text:
Office of Scientific and Technical Information
DOE Green Energy (OSTI)
New methods of repairing mis-machined components are always of interest. In this study, an innovative method using Laser Engineered Net Shape{trademark} (LENS{reg_sign}) forming was used to repair intentionally mis-machined test articles. The components were repaired and subsequently hydrogen charged and burst tested. The LENS repair did not have an adverse effect on the solid state weld process that was used to repair the components. Hydrogen charged samples failed in a similar manner to the uncharged samples. Overall, the prospects for LENS repairing similar products are favorable and further work is encouraged.
Korinko, P; Thad Adams, T
A method to repair mismatched or damaged components using Laser Engineered Net Shaping{sup R} (LENS) technology to apply material was investigated for its feasibility for components exposed to hydrogen. The mechanical properties of LENS bulk materials were also tested for hydrogen compatibility. The LENS process was used to repair simulated and actual mismachined components. These sample components were hydrogen charged and burst tested in the as-received, as-damaged, and as-repaired conditions. The testing showed that there was no apparent additional deficiency associated with hydrogen charging compared to the repair technique. The repair techniques resulted in some components meeting the requirements while others did not. Additional procedure/process development is required prior to recommending production use of LENS.
Korinko, P.; Adams, T.
Osteochondral defect repair using a novel tissue engineering approach: Sheep model study
Science Conference Proceedings (OSTI)
Porous calcium polyphosphate (CPP) constructs of desired density were formed by sintering CPP powders. Articular cartilage was formed on these constructs in cell culture over an 8-week period with the resulting cartilage layer forming on the CPP surface ... Keywords: Articular cartilage repair, implants, in vitro and in vivo studies, osteochondral implants, porous calcium polyphosphate, tissue engineering, tissue ingrowth
R. M. Pilliar; R. A. Kandel; M. D. Grynpas; P. Zalzal; M. Hurtig
Laser engineered net shaping (LENS) for the repair and modification of NWC metal components.
Laser Engineered Net Shaping{trademark} (LENS{reg_sign}) is a layer additive manufacturing process that creates fully dense metal components using a laser, metal powder, and a computer solid model. This process has previously been utilized in research settings to create metal components and new material alloys. The ''Qualification of LENS for the Repair and Modification of Metal NWC Components'' project team has completed a Technology Investment project to investigate the use of LENS for repair of high rigor components. The team submitted components from four NWC sites for repair or modification using the LENS process. These components were then evaluated for their compatibility to high rigor weapons applications. The repairs included hole filling, replacement of weld lips, addition of step joints, and repair of surface flaws and gouges. The parts were evaluated for mechanical properties, corrosion resistance, weldability, and hydrogen compatibility. This document is a record of the LENS processing of each of these component types and includes process parameters, build strategies, and lessons learned. Through this project, the LENS process was shown to successfully repair or modify metal NWC components.
Atwood, Clinton J.; Smugeresky, John E. (Sandia National Labs, Livermore,CA); Gill, David Dennis
Advanced Nuclear Technology: Reduction of American Society of Mechanical Engineers III Weld Fabrication Repairs--Fitness for Purpose
This report provides alternative acceptance criteria to existing American Society of Mechanical Engineers (ASME) Section III acceptance criteria for fabrication welds. The objective is to avoid unnecessary repairs of Class 1 and Class 2 full-penetration butt welds. The bases for the project are threefold: 1) the repair of fabrication flaws is known to contribute to failures during subsequent service, 2) the ASME Code does not currently provide fitness-for-service assessment of fabrication flaws, and 3) a...
An engineering analysis of natural and biomimetic self-repair processes for solar energy harvesting
E-Print Network (OSTI)
Plants have evolved highly sophisticated mechanisms of self-repair to regenerate proteins that become photo-damaged over time. Key to this self-repair process is the reversible self-assembly of protein complexes, which is ...
Boghossian, Ardemis A. (Ardemis Anoush)
Notice of Unplanned Outage at the Mirant Potomac River Plant | Department
Energy.gov (U.S. Department of Energy (DOE)) Indexed Site
Unplanned Outage at the Mirant Potomac River Plant Unplanned Outage at the Mirant Potomac River Plant Notice of Unplanned Outage at the Mirant Potomac River Plant Docket No. EO-05-01. Order No. 202-05-03: Pursuant to the United States Department of Energy ("DOE") Order No_ 202-05-3, issued December 20, 2005 ("DOE Potomac River Order"), Pepco hereby files this notice of an unplanned outage of one of the 230kV circuits serving the Potomac River Substation, and through that station, the District of Columbia. Notice of Unplanned Outage at the Mirant Potomac River Plant More Documents & Publications Re: Potomac River Generating Station Department of Energy, Case No. EO-05-01: Potomac Electric Power Company (PEPCO) Concerning Planned Outages of the 230 kV circuits Further Notice of 230kV Circuit Planned Outages
www.eprg.group.cam.ac.uk Predicting the Contractual Cost of Unplanned Shutdowns of Power
Keywords The growing penetration of intermittent power generation technologies is increasing the importance of efficient electricity balancing mechanisms. This paper presents a model for analysing the financial cost to an electricity supplier when a power generator unexpectedly instananeously shuts down, in the context of the UK National Grid. The simulation probabilistically selects historical market data and includes analysis on the impact on the system buy price of historical unplanned generator shutdowns. A case study is presented for one revolutionary nuclear power station design concept, the Accelerator-Driven Subcritical Reactor (ADSR). The reliability of ADSRs is a key issue facing their future development. The model is used to identify when the economic cost of improving reliability exceeds the cost of unplanned shutdowns. The results are presented in a form that allows the reader to scale the cost of accelerator system failures for any capacity factor and coefficient of reliability, for a range of discount rates and electricity prices. unplanned shutdown, cost, intermittent, accelerator-driven subcritical reactor Contact
Power Stations; An Accelerator-driven Subcritical; Steven J Steer; William J Nuttall; Geoffrey T Parks; Leonardo Vn Gon�alves; Steven J Steer; William J Nuttall; Geoffrey T Parks; Leonardo V N Gon�alves
Welding and Repair Technology Center: Rolled Plate Repair Guide
This report is intended to enlighten and assist power plant engineers in the application of welded rolled plate repairs in both nuclear and balance-of-plant piping systems. This report introduces the engineer to post-construction standards in non-nuclear industries that use these types of repair, often on a widespread basis. Related requirements in those standards are explained in order to assist the engineer in planning and designing balance-of-plant repairs using welded rolled plates in various applica...
Blade reliability collaborative : collection of defect, damage and repair data.
SciTech Connect
The Blade Reliability Collaborative (BRC) was started by the Wind Energy Technologies Department of Sandia National Laboratories and DOE in 2010 with the goal of gaining insight into planned and unplanned O&M issues associated with wind turbine blades. A significant part of BRC is the Blade Defect, Damage and Repair Survey task, which will gather data from blade manufacturers, service companies, operators and prior studies to determine details about the largest sources of blade unreliability. This report summarizes the initial findings from this work.
Ashwill, Thomas D.; Ogilvie, Alistair B.; Paquette, Joshua A.
Welding and Repair Technology Center: Repair Technology for Degraded Pressure Vessel and Heat Exchanger Shells
BackgroundPressure vessels and heat exchangers are subject to a number of degradation mechanisms that can cause thinning of component walls and deterioration of internal components. With many repair options available, the Electric Power Research Institute (EPRI) Welding and Repair Technology Center (WRTC) has developed this report to assist operations and engineering personnel who are faced with defective or failed vessel components. Many available repair options allow ...
Fan Repair Guideline
The successful repair of a fan component is affected by a number of different factors. These include correctly assessing the root cause of failure, determining the best repair option, implementation of proper repair procedures, and compliance with applicable codes and standards. However, in many situations the proper solution is not clearly evident. The purpose of this document is to provide guidance in the area of induced draft / forced draft fan repair. Specifically, this document deals with the repair...
Rapid road repair vehicle
DOE Patents (OSTI)
Disclosed is a rapid road repair vehicle capable of moving over a surface to be repaired at near normal posted traffic speeds to scan for and find at the high rate of speed, imperfections in the pavement surface, prepare the surface imperfection for repair by air pressure and vacuum cleaning, applying a correct amount of the correct patching material to effect the repair, smooth the resulting repaired surface, and catalog the location and quality of the repairs for maintenance records of the road surface. The rapid road repair vehicle can repair surface imperfections at lower cost, improved quality, at a higher rate of speed than was not heretofor possible, with significantly reduced exposure to safety and health hazards associated with this kind of road repair activities in the past. 2 figs.
Mara, L.M.
NLE Websites -- All DOE Office Websites (Extended Search)
Engineering Engineering Engineering1354608000000EngineeringSome of these resources are LANL-only and will require Remote Access./No/Questions? firstname.lastname@example.com Engineering Some of these resources are LANL-only and will require Remote Access. Key Resources Reference Standards Data Sources Organizations Journals Key Resources Engineering Village Includes Engineering Index (Ei) and Compendex Knovel Handbooks, databases, and eBooks integrated with analytical and search tools IEEE Xplore Full text access to technical literature, standards, and conference proceedings in engineering and technology SPIE Digital Library Full-text papers from SPIE journals and proceedings published since 1998; subject coverage includes optics, photonics, electronic imaging, visual information processing, biomedical optics, lasers, and
Electrodynamics Bioscience, Biosecurity, Health Chemical Science Earth, Space Sciences Energy Engineering High Energy Density Plasmas, Fluids Information Science, Computing,...
Repairing structurally complex data
We present a novel algorithm for repairing structurally complex data. Given an assertion that represents desired structural integrity constraints and a structure that violates them, the algorithm performs repair actions that mutate the given structure ...
Sarfraz Khurshid; Iv�n Garc�a; Yuk Lai Suen
Optimizing chondrogenic factors and protein delivery methods for cartilage repair
Joint injuries are common and often result in damage to cartilage, which has a limited ability to repair itself. Tissue engineering is a promising approach for improving cartilage healing in which biomaterials and chemical ...
Florine, Emily Marie
Technical Repair Guidelines for Limitorque Models SMB 0 Through 4 Valve Actuators
This technical repair guide for Limitorque motor-operated valve (MOV) actuator models SMB 0 through 4 represents the third in a series of documents devoted to the comprehensive maintenance and repair of Limitorque actuators. This guide provides instructions for engineering, operations, and maintenance personnel on MOV actuator repair, maintenance, adjustment, and troubleshooting methods.
Technical Repair Guidelines for Limitorque Gear Operator Models HBC 0-10
This technical repair guide (TRG) for Limitorque gear operator models HBC-0 through HBC-10 is the fourth in a series of documents devoted to the comprehensive maintenance and repair of Limitorque valve actuators. This guide provides instructions for engineering, operations, and maintenance personnel on the repair, maintenance, and operation of Limitorque HBC gear operators and their accessories.
Engineering Engineering Lawrence Livermore National Laboratory Home Technologies Core Competencies Showcase Careers Partnerships About Advanced Manufacturing Developing high-performance materials, devices, components, and assemblies enabled by innovative design tools and novel manufacturing techniques Learn more Applied Electromagnetics Supporting the development of electromagnetic systems that are pervasive and paramount to the greater National Security community. Learn more Data Sciences Enabling better decisions through the development and application of state-of-the-art techniques in machine learning, statistics, and decision sciences Learn more Precision Engineering Embracing determinism to guide rigorous design, construction, and metrology of mechatronic systems, instruments, and manufactured components
The two broad categories of fiber-reinforced composite liner repair and deposited weld metal repair technologies were reviewed and evaluated for potential application for internal repair of gas transmission pipelines. Both are used to some extent for other applications and could be further developed for internal, local, structural repair of gas transmission pipelines. Principal conclusions from a survey of natural gas transmission industry pipeline operators can be summarized in terms of the following performance requirements for internal repair: (1) Use of internal repair is most attractive for river crossings, under other bodies of water, in difficult soil conditions, under highways, under congested intersections, and under railway crossings. (2) Internal pipe repair offers a strong potential advantage to the high cost of horizontal direct drilling when a new bore must be created to solve a leak or other problem. (3) Typical travel distances can be divided into three distinct groups: up to 305 m (1,000 ft.); between 305 m and 610 m (1,000 ft. and 2,000 ft.); and beyond 914 m (3,000 ft.). All three groups require pig-based systems. A despooled umbilical system would suffice for the first two groups which represents 81% of survey respondents. The third group would require an onboard self-contained power unit for propulsion and welding/liner repair energy needs. (4) The most common size range for 80% to 90% of operators surveyed is 508 mm (20 in.) to 762 mm (30 in.), with 95% using 558.8 mm (22 in.) pipe. Evaluation trials were conducted on pipe sections with simulated corrosion damage repaired with glass fiber-reinforced composite liners, carbon fiber-reinforced composite liners, and weld deposition. Additional un-repaired pipe sections were evaluated in the virgin condition and with simulated damage. Hydrostatic failure pressures for pipe sections repaired with glass fiber-reinforced composite liner were only marginally greater than that of pipe sections without liners, indicating that this type of liner is only marginally effective at restoring the pressure containing capabilities of pipelines. Failure pressures for larger diameter pipe repaired with a semi-circular patch of carbon fiber-reinforced composite lines were also marginally greater than that of a pipe section with un-repaired simulated damage without a liner. These results indicate that fiber reinforced composite liners have the potential to increase the burst pressure of pipe sections with external damage Carbon fiber based liners are viewed as more promising than glass fiber based liners because of the potential for more closely matching the mechanical properties of steel. Pipe repaired with weld deposition failed at pressures lower than that of un-repaired pipe in both the virgin and damaged conditions, indicating that this repair technology is less effective at restoring the pressure containing capability of pipe than a carbon fiber-reinforced liner repair. Physical testing indicates that carbon fiber-reinforced liner repair is the most promising technology evaluated to-date. In lieu of a field installation on an abandoned pipeline, a preliminary nondestructive testing protocol is being developed to determine the success or failure of the fiber-reinforced liner pipeline repairs. Optimization and validation activities for carbon-fiber repair methods are ongoing.
Bill Bruce; Nancy Porter; George Ritter; Matt Boring; Mark Lozev; Ian Harris; Bill Mohr; Dennis Harwig; Robin Gordon; Chris Neary; Mike Sullivan
The two broad categories of fiber-reinforced composite liner repair and deposited weld metal repair technologies were reviewed and evaluated for potential application for internal repair of gas transmission pipelines. Both are used to some extent for other applications and could be further developed for internal, local, structural repair of gas transmission pipelines. Principal conclusions from a survey of natural gas transmission industry pipeline operators can be summarized in terms of the following performance requirements for internal repair: (1) Use of internal repair is most attractive for river crossings, under other bodies of water, in difficult soil conditions, under highways, under congested intersections, and under railway crossings. (2) Internal pipe repair offers a strong potential advantage to the high cost of horizontal direct drilling when a new bore must be created to solve a leak or other problem. (3) Typical travel distances can be divided into three distinct groups: up to 305 m (1,000 ft.); between 305 m and 610 m (1,000 ft. and 2,000 ft.); and beyond 914 m (3,000 ft.). All three groups require pig-based systems. A despooled umbilical system would suffice for the first two groups which represents 81% of survey respondents. The third group would require an onboard self-contained power unit for propulsion and welding/liner repair energy needs. (4) The most common size range for 80% to 90% of operators surveyed is 508 mm (20 in.) to 762 mm (30 in.), with 95% using 558.8 mm (22 in.) pipe. Evaluation trials were conducted on pipe sections with simulated corrosion damage repaired with glass fiber-reinforced composite liners, carbon fiber-reinforced composite liners, and weld deposition. Additional un-repaired pipe sections were evaluated in the virgin condition and with simulated damage. Hydrostatic failure pressures for pipe sections repaired with glass fiber-reinforced composite liner were only marginally greater than that of pipe sections without liners, indicating that this type of liner is only marginally effective at restoring the pressure containing capabilities of pipelines. Failure pressures for larger diameter pipe repaired with a semi-circular patch of carbon fiber-reinforced composite lines were also marginally greater than that of a pipe section with un-repaired simulated damage without a liner. These results indicate that fiber reinforced composite liners have the potential to increase the burst pressure of pipe sections with external damage Carbon fiber based liners are viewed as more promising than glass fiber based liners because of the potential for more closely matching the mechanical properties of steel. Pipe repaired with weld deposition failed at pressures lower than that of un-repaired pipe in both the virgin and damaged conditions, indicating that this repair technology is less effective at restoring the pressure containing capability of pipe than a carbon fiber-reinforced liner repair. Physical testing indicates that carbon fiber-reinforced liner repair is the most promising technology evaluated to-date. The first round of optimization and validation activities for carbon-fiber repairs are complete. Development of a comprehensive test plan for this process is recommended for use in the field trial portion of this program.
Robin Gordon; Bill Bruce; Ian Harris; Dennis Harwig; George Ritter; Bill Mohr; Matt Boring; Nancy Porter; Mike Sullivan; Chris Neary
The two broad categories of fiber-reinforced composite liner repair and deposited weld metal repair technologies were reviewed and evaluated for potential application for internal repair of gas transmission pipelines. Both are used to some extent for other applications and could be further developed for internal, local, structural repair of gas transmission pipelines. Principal conclusions from a survey of natural gas transmission industry pipeline operators can be summarized in terms of the following performance requirements for internal repair: (1) Use of internal repair is most attractive for river crossings, under other bodies of water, in difficult soil conditions, under highways, under congested intersections, and under railway. (2) Internal pipe repair offers a strong potential advantage to the high cost of horizontal direct drilling when a new bore must be created to solve a leak or other problem. (3) Typical travel distances can be divided into three distinct groups: up to 305 m (1,000 ft.); between 305 m and 610 m (1,000 ft. and 2,000 ft.); and beyond 914 m (3,000 ft.). All three groups require pig-based systems. A despooled umbilical system would suffice for the first two groups which represents 81% of survey respondents. The third group would require an onboard self-contained power unit for propulsion and welding/liner repair energy needs. (4) The most common size range for 80% to 90% of operators surveyed is 508 mm (20 in.) to 762 mm (30 in.), with 95% using 558.8 mm (22 in.) pipe. Evaluation trials were conducted on pipe sections with simulated corrosion damage repaired with glass fiber-reinforced composite liners, carbon fiber-reinforced composite liners, and weld deposition. Additional un-repaired pipe sections were evaluated in the virgin condition and with simulated damage. Hydrostatic failure pressures for pipe sections repaired with glass fiber-reinforced composite liner were only marginally greater than that of pipe sections without liners, indicating that this type of liner is only marginally effective at restoring the pressure containing capabilities of pipelines. Failure pressures for larger diameter pipe repaired with a semi-circular patch of carbon fiber-reinforced composite lines were also marginally greater than that of a pipe section with un-repaired simulated damage without a liner. These results indicate that fiber reinforced composite liners have the potential to increase the burst pressure of pipe sections with external damage Carbon fiber based liners are viewed as more promising than glass fiber based liners because of the potential for more closely matching the mechanical properties of steel. Pipe repaired with weld deposition failed at pressures lower than that of un-repaired pipe in both the virgin and damaged conditions, indicating that this repair technology is less effective at restoring the pressure containing capability of pipe than a carbon fiber-reinforced liner repair. Physical testing indicates that carbon fiber-reinforced liner repair is the most promising technology evaluated to-date. Development of a comprehensive test plan for this process is recommended for use in the field trial portion of this program.
Valve Application, Maintenance, and Repair Guide: In Situ State-of-the-Art Valve Welding Repair (Gate, Globe, & Check Valves), Volum e 2
The Valve Application, Maintenance and Repair Guide is a three volume series that provides a generic overview of valve application selection, maintenance, and repair. Volume 2 of this series is a comprehensive guide for in situ weld repair of gate, globe, and check valve components such as bodies, bonnets, discs, and seats. The information in this guide, though directed toward nuclear plant personnel, will assist all power plant engineers, planners, and maintenance personnel responsible for valve mainten...
Gas Turbine Compressor Field Repair Guideline: GE 7FA
This guideline is designed to assist gas turbine owners confronted with limited damage to compressor rotating blade airfoils. The guideline addresses typical damage to the airfoil tip and leading edge where a limited amount of material trimming and blending is allowable. The guideline provides an engineering basis for implementing safe repairs and avoiding possible risk of airfoil failure due to high-cycle fatigue. In-situ field repair criteria are given for each compressor row R-0 through R-17 for ...
Welding and Repair Technology Center: Repair Welding Handbook
During the life of a power plant, it often becomes necessary to perform weld repairs of various materials in order to continue safe operation. Much work has been completed in this area to assist utilities with choosing appropriate repair techniques based on the materials involved and the damage mechanism that makes the repair necessary. This report captures in one resource a variety of repair methods that have been proven to be effective.
Technical Repair Guidelines for Limitorque Model SMB-000 Valve Actuators: Revision 1
This technical repair guide (TRG) for Limitorque motor-operated valve (MOV) actuator model SMB-000 is the first in a series of documents devoted to the comprehensive maintenance and repair of Limitorque actuators. This guide provides instructions for engineering, operations, and maintenance personnel on MOV actuator repair, maintenance, adjustment, and troubleshooting methods. Originally published in 1989, this document has now been thoroughly revised (Revision 1) to incorporate new information and techn...
Orthopaedic tissue engineering and bone regeneration
Orthopaedic tissue engineering combines the application of scaffold materials, cells and the release of growth factors. It has been described as the science of persuading the body to reconstitute or repair tissues that have failed to regenerate or heal ... Keywords: Bone, biodegradable polymers, biomaterials, cell therapy, fracture repair, orthopaedics, tissue engineering
Glenn Dickson; Fraser Buchanan; David Marsh; Eileen Harkin-Jones; Uel Little; Mervyn McCaigue
Repairs of Deaerators
This report provides a brief background of deaerator operation, including types of deaerators. Materials of construction are reviewed along with inspection, failure mechanisms, and repair methods. Some general information is provided to calculate minimum wall to see if deaerators are suitable for continued operation with defects in place.
Modeling and centralization of strategic inventory for repairable and long lead-time spare parts
This thesis develops an optimal inventory model for repairable and long leadtime spare parts for an Engine overhaul business. In addition, it presents a business case for centralization of inventory. Pratt & Whitney purchased ...
Duncan, Tyeliah Elaine
Industrial motor repair in the United States
This report characterizes the motor repair industry in the United States; summarizes current motor repair and testing practice; and identifies barriers to energy motor repair practice and recommends strategies for overcoming those barriers.
Schueler, V.; Leistner, P.; Douglass, J.
Microsoft PowerPoint - Bull Shoals U1 repair MSB edit 3.ppt
Bull Shoals Unit 1 161kV Bull Shoals Unit 1 161kV Switchyard Feeder Repair Bull Shoals Unit 1 161kV Bull Shoals Unit 1 161kV Switchyard Feeder Repair Switchyard Feeder Repair Mark Dixson Little Rock District US Army Corps US Army Corps of Engineers of Engineers ® ® One Corps Serving The Army and the Nation * Original Equipment - 52 years old. * Unit 1 Oil filled cable pothead failed and exploded on Sept 6 2006. * Resulting fire and fire suppression damaged oil insulated cable system * Minor damage to power plant. Background Background Background US Army Corps US Army Corps of Engineers of Engineers ® ® One Corps Serving The Army and the Nation * Transformer Unit 2 damaged and removed from service. * Cause of fire - Failure of Pothead stress cone assembly and build up of combustible gas * Power Plant lost all power and went in the
Two-dimensional warranty repair strategy based on minimal and complete repairs
For repairable products, the warrantor has options in choosing the degree of repair applied to an item that has failed within the warranty period. We focus on a particular warranty repair strategy, related to the degree of the warranty repair, for non-renewing, ... Keywords: Expected warranty servicing costs, Warranty, Warranty repair strategy
S. Chukova; M. R. Johnston
Inspect and Repair Steam Traps
This revised ITP tip sheet on inspecting and repairing steam traps provide how-to advice for improving industrial steam systems using low-cost, proven practices and technologies.
Not Available
Parsing speech repair without specialized grammar symbols
This paper describes a parsing model for speech with repairs that makes a clear separation between linguistically meaningful symbols in the grammar and operations specific to speech repair in the operation of the parser. This system builds a model of ...
Tim Miller; Luan Nguyen; William Schuler
Localized Hardfacing Repair Techniques, RRAP45
Hardfacing overlays provide a hard, corrosive-resistant wear surface for critical valve, pump, and other component materials susceptible to one or more of the various wear mechanisms. As a result of being hard, these materials are also difficult to deposit and even more difficult to repair. When faced with a repair, owners either replace the hardfaced component or go through a time-consuming and difficult repair task. This report presents repair practices utilized by hardfacing alloy manufacturers, valve...
Gas Turbine Component Repair Shop Capabilities
Aftermarket repair services for gas turbine OM has been undergoing continual transformation beginning with the emergence of independent shops in the 1980s. The original equipment manufacturers (OEMs) in the late 1990s began to aggressively pursue repair services. Gas turbine hot section component repair/replacement coupled with inspection/overhaul technical support has come to be offered as long-term service agreements (LTSAs). These agreements often extend from 6 to 18 years. The repair business continu...
Safety, Capacity, Maintenance and Major Repairs (SCMMR) ...
... repairing and replacing aging mechanical and electrical ... and replacing or upgrading site utility systems; ... will avoid costly infrastructure failures such ...
Safety, Capacity, Maintenance, and Major Repair
... Continue repairing or replacing aging utility systems, exhaust and air ... Continue improvements to site infrastructure, including roads, loading docks ...
Advances in Hydroelectric Turbine Manufacturing and Repair
About this Symposium. Meeting, Materials Science & Technology 2013. Symposium, Advances in Hydroelectric Turbine Manufacturing and Repair. Sponsorship�...
Development and validation of bonded composite doubler repairs for commercial aircraft.
A typical aircraft can experience over 2,000 fatigue cycles (cabin pressurizations) and even greater flight hours in a single year. An unavoidable by-product of aircraft use is that crack, impact, and corrosion flaws develop throughout the aircraft's skin and substructure elements. Economic barriers to the purchase of new aircraft have placed even greater demands on efficient and safe repair methods. The use of bonded composite doublers offers the airframe manufacturers and aircraft maintenance facilities a cost effective method to safely extend the lives of their aircraft. Instead of riveting multiple steel or aluminum plates to facilitate an aircraft repair, it is now possible to bond a single Boron-Epoxy composite doubler to the damaged structure. The FAA's Airworthiness Assurance Center at Sandia National Labs (AANC), Boeing, and Federal Express completed a pilot program to validate and introduce composite doubler repair technology to the U.S. commercial aircraft industry. This project focused on repair of DC-10 fuselage structure and its primary goal was to demonstrate routine use of this repair technology using niche applications that streamline the design-to-installation process. As composite doubler repairs gradually appear in the commercial aircraft arena, successful flight operation data is being accumulated. These commercial aircraft repairs are not only demonstrating the engineering and economic advantages of composite doubler technology but they are also establishing the ability of commercial maintenance depots to safely adopt this repair technique. This report presents the array of engineering activities that were completed in order to make this technology available for widespread commercial aircraft use. Focused laboratory testing was conducted to compliment the field data and to address specific issues regarding damage tolerance and flaw growth in composite doubler repairs. Fatigue and strength tests were performed on a simulated wing repair using a substandard design and a flawed installation. In addition, the new Sol-Gel surface preparation technique was evaluated. Fatigue coupon tests produced Sol-Gel results that could be compared with a large performance database from conventional, riveted repairs. It was demonstrated that not only can composite doublers perform well in severe off-design conditions (low doubler stiffness and presence of defects in doubler installation) but that the Sol-Gel surface preparation technique is easier and quicker to carry out while still producing optimum bonding properties. Nondestructive inspection (NDI) methods were developed so that the potential for disbond and delamination growth could be monitored and crack growth mitigation could be quantified. The NDI methods were validated using full-scale test articles and the FedEx aircraft installations. It was demonstrated that specialized NDI techniques can detect flaws in composite doubler installations before they reach critical size. Probability of Detection studies were integrated into the FedEx training in order to quantify the ability of aircraft maintenance depots to properly monitor these repairs. In addition, Boeing Structural Repair and Nondestructive Testing Manuals were modified to include composite doubler repair and inspection procedures. This report presents the results from the FedEx Pilot Program that involved installation and surveillance of numerous repairs on operating aircraft. Results from critical NDI evaluations are reported in light of damage tolerance assessments for bonded composite doublers. This work has produced significant interest from airlines and aircraft manufacturers. The successful Pilot Program produced flight performance history to establish the durability of bonded composite patches as a permanent repair on commercial aircraft structures. This report discusses both the laboratory data and Pilot Program results from repair installations on operating aircraft to introduce composite doubler repairs into mainstream commercial aircraft use.
Roach, Dennis Patrick; Rackow, Kirk A.
Spring 2009 Engineering Our Future
of whirring wind turbines JeffSammons The Energy Issue: Going Green Donovan Maddox Chair Created Cash Chair and Computer Engineering. Grid-connected wind turbines, solar power plants, and other renewable sources have, to install, maintain, and repair wind turbines and related equipment. The program offers Wind Technician
Zhang, Yuanlin
Optical Mapping of Impulse Propagation in Engineered Cardiac Tissue
Cardiac tissue engineering has a potential to provide functional, synchronously contractile tissue constructs for heart repair, and for studies of development and disease using in vivo�like yet controllable in vitro settings. ...
Radisic, Milica
Gas Turbine Repair Guidelines: GE 9FA
For more than a decade, the Electric Power Research Institute (EPRI) has been developing gas turbine hot section component repair and coating guidelines to assist utilities in the refurbishment of these critical and expensive parts. Utilities, generators, and repair vendors have used these guidelines to perform repairs on blades, turbine vanes, and combustion hardware. Guidelines now exist for a variety of conventional and advanced General Electric, Siemens/Westinghouse, Alstom, and Mitsubishi heavy ...
Alloy 600 Repairs with PTAW Process
Many utilities have Alloy 600 reactor vessel heads (RVHs) that are susceptible to primary water stress corrosion cracking (PWSCC), but have not cracked to date. This has prompted an exploration of repair and mitigation options to prevent future degradation of the RVH. Inconel 52 and Inconel 152, which are resistant to PWSCC, have been identified as potential repair alloys for Alloy 600 type repairs, and have been evaluated with the gas tungsten arc welding (GTAW) and shielded metal arc welding (SMAW) pro...
Gas Turbine Repair Guidelines: Alstom GT26
For more than a decade, the Electric Power Research Institute (EPRI) has been developing gas turbine hot section component repair and coating guidelines to assist utilities and power generators in the refurbishment of these critical and expensive parts. Utilities, generators, and repair vendors have used these guidelines to perform repairs on turbine blades, vanes, and combustion hardware. The guidelines in this volume address the specific features of the Alstom GT26 gas turbine.
Gas Turbine Repair Guidelines: GE 7FA
For more than a decade, the Electric Power Research Institute (EPRI) has been developing gas turbine hot section component repair and coating guidelines to assist utilities in the refurbishment of these critical and expensive parts. Utilities, generators, and repair vendors have used these guidelines to perform repairs on blades, turbine vanes, and combustion hardware. Guidelines now exist for a variety of conventional and advanced General Electric, Siemens/Westinghouse, Alstom, and Mitsubishi heavy fram...
The Gordon conference on mammalian DNA repair
A brief overview of the Gordon Conference on Mammalian Repair held February 1-5, 1993 in Ventura, California is presented.
Cleaver, J.E.; Smerdon, M.J.
International congress on DNA damage and repair: Book of abstracts
This document contains the abstracts of 105 papers presented at the Congress. Topics covered include the Escherichia coli nucleotide excision repair system, DNA repair in malignant transformations, defective DNA repair, and gene regulation. (TEM)
NSLS Services | Repair & Equipment Services
Repair & Equipment Services Repair & Equipment Services Cleaning Facility (BNL Central Shops) Solvent cleaning of vacuum parts and leak checking service is also available. Work is billed to each user via a BNL ILR. Contact the NSLS Building Manager to arrange for any of these services. Electronics Repair Limited repairs for electronic equipment are available from an outside contractor through the Control Room. Contact Control Room Supervisor Randy Church (x2550 or x2736, pager 5310). Shipping memos are filled out on the web, and pick ups are on Fridays. Come to the Control Room for assistance. The user should call the contractor on the day before scheduled pickups to alert the contractor of the pickup. Items to be repaired should be left in the Control Room with the completed shipping memo. Costs are charged to the
Engines - Spark Ignition Engines
Spark Ignition Engines Spark Ignition Engines Thomas Wallner and omni engine Thomas Wallner and the omnivorous engine Background Today the United States import more than 60% of its crude oil and petroleum products. Transportation accounts for a major portion of these imports. Research in this field is focused on reducing the dependency on foreign oil by increasing the engine efficiency on the one hand and blending gasoline with renewable domestic fuels, such as ethanol, on the other. Argonne's Research The main focus of research is on evaluation of advanced combustion concepts and effects of fuel properties on engine efficiency, performance and emissions. The platforms used are a single-cylinder research engine as well as an automotive-size four-cylinder engine with direct fuel injection.
A sociotechnical framework for understanding infrastructure breakdown and repair
This paper looks at how and why infrastructure is repaired. With a new era of infrastructure spending underway, policymakers need to understand and anticipate the particular technical and political challenges posed by infrastructure repair. In particular, as infrastructure problems are increasingly in the public eye with current economic stimulus efforts, the question has increasingly been asked: why has it been so difficult for the United Statesto devote sustained resources to maintaining and upgrading its national infrastructure? This paper provides a sociotechnical framework for understanding the challenges of infrastructure repair, and demonstrates this framework using a case study of seismic retrofit of freeway bridges in California. The design of infrastructure is quite different from other types of design work even when new infrastructure is being designed. Infrastructure projects are almost always situated within, and must work with, existing infrastructure networks. As a result, compared to design of more discrete technological artifacts, the design of infrastructure systems requires a great deal of attention to interfaces as well as adaptation of design to the constraints imposed by existing systems. Also, because of their scale, infrastructural technologies engage with social life at a level where explicit political agendas may playa central role in the design process. The design and building of infrastructure is therefore often an enormously complex feat of sociotechnical engineering, in which technical and political agendas are negotiated together until an outcome is reached that allows the project to move forward. These sociotechnical settlements often result in a complex balancing of powerful interests around infrastructural artifacts; at the same time, less powerful interests have historically often been excluded or marginalized from such settlements.
Sims, Benjamin H [Los Alamos National Laboratory
The technical and economic success of repairable PDC bits
Repairable PDC bits have saved operators and contractors millions of dollars in bit costs alone. The repair of steel-bodied PDC bits has been going on for over 4 years but more recently, due to technical innovations, matrix body bits are becoming repairable. DBS was concerned when starting the repairability project that the quality of a repaired bit be close to that of a new bit. Conventional thinking had it that the repaired bit would at best be slightly inferior to a new bit. However, during our initial evaluation of repaired steel-bodied bits, the authors noticed that, remarkably, the repaired bits overall drilled more footage per run at a higher rate of penetration than new bits. After over 200 bits had been run, repaired, and rerun, in every case and for every bit style the average footage and ROP were slightly higher for the repaired bit.
Matson, L.; Stratabit, D.B.
DART: a data acquisition and repairing tool
An architecture is proposed providing robust data acquisition facilities from input documents containing tabular data. This architecture is based on a data-repairing framework exploiting integrity constraints defined on the input data to support the ...
Bettina Fazzinga; Sergio Flesca; Filippo Furfaro; Francesco Parisi
Energy and Technology Review: Unlocking the mysteries of DNA repair
DNA, the genetic blueprint, has the remarkable property of encoding its own repair following diverse types of structural damage induced by external agents or normal metabolism. We are studying the interplay of DNA damaging agents, repair genes, and their protein products to decipher the complex biochemical pathways that mediate such repair. Our research focuses on repair processes that correct DNA damage produced by chemical mutagens and radiation, both ionizing and ultraviolet. The most important type of DNA repair in human cells is called excision repair. This multistep process removes damaged or inappropriate pieces of DNA -- often as a string of 29 nucleotides containing the damage -- and replaces them with intact ones. We have isolated, cloned, and mapped several human repair genes associated with the nucleotide excision repair pathway and involved in the repair of DNA damage after exposure to ultraviolet light or mutagens in cooked food. We have shown that a defect in one of these repair genes, ERCC2, is responsible for the repair deficiency in one of the groups of patients with the recessive genetic disorder xeroderma pigmentosum (XP group D). We are exploring ways to purify sufficient quantities (milligrams) of the protein products of these and other repair genes so that we can understand their functions. Our long-term goals are to link defective repair proteins to human DNA repair disorders that predispose to cancer, and to produce DNA-repair-deficient mice that can serve as models for the human disorders.
Quirk, W.A.
Isogeometric Simulation of Turbine Blades for Aircraft Engines David Gromann1
Isogeometric Simulation of Turbine Blades for Aircraft Engines David Gro�?mann1 , Bert Jüttler2, in the challenging field of aircraft engines. We study the deformation of turbine blades under the assumption, manufacturing and repairing turbine engines for aircrafts. A challenging task in this field is the efficient
Jüttler, Bert
Valve Application, Maintenance, and Repair Guide
The Valve Application, Maintenance, and Repair Guide is a two-volume series that provides a generic overview of valve application, selection, maintenance, and repair. Volume 1 of the series is a comprehensive reference on the application and use of valves that provides guidance on the selection of specific types of valves on the basis of functional and system requirements. This document is based on an earlier EPRI document (NP-6516, Guide for the Application and Use of Valves in Power Plant Systems). Ext...
Repairable chip bonding/interconnect process
A repairable, chip-to-board interconnect process which addresses cost and testability issues in the multi-chip modules is disclosed. This process can be carried out using a chip-on-sacrificial-substrate technique, involving laser processing. This process avoids the curing/solvent evolution problems encountered in prior approaches, as well is resolving prior plating problems and the requirements for fillets. For repairable high speed chip-to-board connection, transmission lines can be formed on the sides of the chip from chip bond pads, ending in a gull wing at the bottom of the chip for subsequent solder. 10 figs.
Bernhardt, A.F.; Contolini, R.J.; Malba, V.; Riddle, R.A.
A repairable, chip-to-board interconnect process which addresses cost and testability issues in the multi-chip modules. This process can be carried out using a chip-on-sacrificial-substrate technique, involving laser processing. This process avoids the curing/solvent evolution problems encountered in prior approaches, as well is resolving prior plating problems and the requirements for fillets. For repairable high speed chip-to-board connection, transmission lines can be formed on the sides of the chip from chip bond pads, ending in a gull wing at the bottom of the chip for subsequent solder.
Bernhardt, Anthony F. (Berkeley, CA); Contolini, Robert J. (Livermore, CA); Malba, Vincent (Livermore, CA); Riddle, Robert A. (Tracy, CA)
Engineering Institute
Engineering Institute Engineering Institute Engineering Institute Engineering dynamics that include flight, vibration isolation for precision manufacturing, earthquake engineering, blast loading, signal processing, and experimental model analysis. Contact Leader, LANL Charles Farrar Email Leader, UCSD Michael Todd Email LANL Program Administrator Jutta Kayser (505) 663-5649 Email Collaboration for conducting mission-driven, multidisciplinary engineering research and recruiting, revitalization, and retention of current & future staff The Engineering Institute is a collaboration between LANL and the University of California at San Diego (UCSD) Jacobs School of Engineering, whose mission is to develop a comprehensive approach for conducting mission-driven, multidisciplinary engineering research
Microsoft PowerPoint - Powerpoint_WebRepair.ppt [Compatibility...
strand break repair is usually error free. g p y * Double strand breaks can be either error free or error t i i hi h t prone, containing a high error rate. Mechanisms of Repair...
Improved syntactic models for parsing speech with repairs
This paper introduces three new syntactic models for representing speech with repairs. These models are developed to test the intuition that the erroneous parts of speech repairs (reparanda) are not generated or recognized as such while occurring, but ...
Tim Miller
Survey of Gas Turbine Component Repair Shops - 2008 Update
Aftermarket repair services for gas turbine O&M has been undergoing continual transformation beginning with the emergence of independent shops in the 1980s. The original equipment manufacturers (OEMs) began to aggressively pursue repair services in the late 1990s. Gas turbine hot section component repair/replacement coupled with inspection/overhaul technical support has come to be known broadly as long-term service agreements (LTSAs). These agreements often extend from 6 to 18 years. The repair business ...
Welding and Repair Technology Center: Underwater Laser Welding Studies
Repair of internal reactor components has been a continuing challenge for the nuclear industry. High radiation levels, underwater environment, and altered material weldability have made traditional repair methods more difficult to use for internal component repair. One of the key issues is to make seal-weld repairs on cracks that might exist due to stress corrosion or fatigue. Sealing of these cracks by welding might be necessary to maintain pressure boundary or flow requirements. During this research pr...
HRSG Material Selection and Repair Guidelines
The number of failures in heat recovery steam generator (HRSG) components has been quite high during the past decade. Many of these failures are attributed to poor design, improper operation, poor fabrication, or poor installation practices. This report provides repair practices and procedures currently being used to correct a number of these problems. It also identifies domestic and international materials commonly employed.
Welding and Repair Technology Center: Welding and Repair Technical Issues in ASME Section XI
The EPRI Welding and Repair Technology Center (WRTC) supports and is involved in numerous ASME Code changes and new initiatives associated with welding, repair, and replacement activities in the nuclear power generation industry. Due to the complicated nature and numerous topics often associated with code and regulatory issues it can be difficult to keep abreast of the current status and progress of changes and new initiatives. This document is intended to be a single reference for WRTC members to ...
The Electric Power Research Institute (EPRI) Welding and Repair Technology Center (WRTC) was involved in numerous ASME Code changes and new initiatives associated with welding, repair, and replacement activities in the nuclear power generation industry during the year 2013. Due to the complicated nature of code and regulatory issues and its variety of topics, it can be difficult to keep abreast of the current status, progress, and new initiatives. This report is intended to be a single reference for ...
Are software engineers true engineers?
Software engineering is an often used term to describe the activities, methods, and tools of large scale software development. There is an ongoing discussion whether Software Engineering can be considered as an engineering discipline. In ...
Claus Lewerentz; Heinrich Rust
Assessment of airplane design, fabrication, and repair
Engineering programs are most often classes dedicated to how to design things, while the topic of reverse engineering or problem solving is rarely discussed. This unequal presentation of two sides of the same discipline ...
Stolar, Lauren (Lauren Elise)
Shockwave Engine: Wave Disk Engine
Broad Funding Opportunity Announcement Project: MSU is developing a new engine for use in hybrid automobiles that could significantly reduce fuel waste and improve engine efficiency. In a traditional internal combustion engine, air and fuel are ignited, creating high-temperature and high-pressure gases which expand rapidly. This expansion of gases forces the engine�s pistons to pump and powers the car. MSU�s engine has no pistons. It uses the combustion of air and fuel to build up pressure within the engine, generating a shockwave that blasts hot gas exhaust into the blades of the engine�s rotors causing them to turn, which generates electricity. MSU�s redesigned engine would be the size of a cooking pot and contain fewer moving parts�reducing the weight of the engine by 30%. It would also enable a vehicle that could use 60% of its fuel for propulsion.
Stirling engines
The Stirling engine was invented by a Scottish clergyman in 1816, but fell into disuse with the coming of the diesel engine. Advances in materials science and the energy crisis have made a hot air engine economically attractive. Explanations are full and understandable. Includes coverage of the underlying thermodynamics and an interesting historical section. Topics include: Introduction to Stirling engine technology, Theoretical concepts--practical realities, Analysis, simulation and design, Practical aspects, Some alternative energy sources, Present research and development, Stirling engine literature.
Reader, G.T.; Hooper
Welding and Repair Technology Center: Overlay Handbook
This report reflects the commitment of the Electric Power Research Institute (EPRI) to serving its members by developing practical tools and guidance in response to specific needs of the industry.BackgroundThe discovery of primary water stress corrosion cracking (PWSCC) in pressurized water reactor (PWR) vessel heads and components has led to the use of corrosion-resistant high-nickel welding alloys for repair and mitigation activities. To date, more than 30 ...
The discovery of primary water stress corrosion cracking (PWSCC) in pressurized water reactor (PWR) vessel heads and components has led to the use of corrosion-resistant high-nickel welding alloys for repair and mitigation activities. To date, more than 30 PWR units have applied weld overlays to pressurizer welds with detected indications or have applied them as a mitigation method. Although the application of weld overlays appears to be a viable solution to managing this difficult issue, the utility ind...
Welding and Repair Technology Center: Evaluation of High-Chromium Nickel-Base Welding Alloys, Resistance to Solidification Cracking - Update
One of the challenges faced by nuclear power industry engineers and managers responsible for making welding and repair decisions is selection of weld metals that have adequate resistance to stress corrosion cracking (SCC) with acceptable resistance to other forms of cracking. Continued testing and evaluation of new and enhanced high-chromium nickel-base filler metals is important to understanding the influence of slight composition changes on sensitivity to known cracking mechanisms and general ...
Distribution System Audits, Leak Detection, and Repair: Kirtland Air Force Base Leak Detection and Repair Program
Best Management Practice Best Management Practice Case Study #3 Distribution System Audits, Leak Detection, and Repair Kirtland Air Force Base - Leak Detection and Repair Program Overview Kirtland Air Force Base (AFB) performed an award winning leak detection and repair program in 2006. The results of the project are saving Kirtland AFB 179 million gallons each year, which is over 16% of the total water use at the base. Kirtland AFB is located on 52,000 acres, southeast and adjacent to Albuquerque, New Mexico. The area is a high altitude desert, only receiving about 8 inches of rain each year. Kirtland AFB draws water from an under- ground aquifer via seven production wells through- out the base. The base also has access to water from the City of Albuquerque. The underground water
Optical engineering
The Optical Engineering thrust area at Lawrence Livermore National Laboratory (LLNL) was created in the summer of 1996 with the following main objectives: (1) to foster and stimulate leading edge optical engineering research and efforts key to carrying out LLNL's mission and enabling major new programs; (2) to bring together LLNL's broad spectrum of high level optical engineering expertise to support its programs. Optical engineering has become a pervasive and key discipline, with applications across an extremely wide range of technologies, spanning the initial conception through the engineering refinements to enhance revolutionary application. It overlaps other technologies and LLNL engineering thrust areas.
Saito, T T
Engines - Compression-Ignition - Locomotive Engines - emissions...
Locomotive Engine Research Program Drives Down Train Emissions General Motors Electromotive Division locomotive engine EMD Engine Locomotive engine manufacturers face a unique...
Low Dose Radiation Research Program: Quantification of Repair of
Quantification of Repair of Low-Dose-Induced DNA Double-Strand Quantification of Repair of Low-Dose-Induced DNA Double-Strand Breaks in Diploid Human Cells Authors: David Schild,1 and Larry H. Thompson,2 Institutions: 1Life Sciences Division, Lawrence Berkeley National Laboratory; and 2BBR Program, Lawrence Livermore National Laboratory Double-strand breaks (DSBs) are the biochemical lesions of primary concern in radiation related health effects. Compelling evidence from rodent and chicken model systems indicates that homologous recombinational repair (HRR) plays an essential role for cell viability in the repair of spontaneous DSBs arising during DNA replication and an important role in the repair of IR-induced DSBs. IR-induced DSBs are also repaired by error-prone nonhomologous end joining (NHEJ). Using hTERT-immortalized
Combustion Turbine Repair Guidelines: General Electric MS6001 Model B
For more than a decade, EPRI has been developing gas turbine hot section component repair and coating guidelines to assist utilities in the refurbishment of these critical and expensive parts. Utilities, generators, and repair vendors have used these guidelines to perform repairs on blades, turbine vanes, and combustion hardware. Guidelines now exist for a variety of conventional and advanced General Electric, Siemens/Westinghouse, Alstom, and Mitsubishi heavy frame gas turbines. The guidelines in this v...
Combustion Turbine Repair Guidelines: Siemens V94.3A
For more than a decade, EPRI has been developing gas turbine hot section component repair and coating guidelines to assist utilities in the refurbishment of these critical and expensive parts. Utilities and repair vendors have used these guidelines to perform repairs on blades, turbine vanes, and combustion hardware. Guidelines now exist for a variety of conventional and advanced General Electric, Siemens/Westinghouse, Alstom, and Mitsubishi heavy frame gas turbines. The guidelines in this volume address...
LENS repair and modification of metal NW components:materials and applications guide.
Laser Engineered Net Shaping{trademark} (LENS{reg_sign}) is a unique, layer additive, metal manufacturing technique that offers the ability to create fully dense metal features and components directly from a computer solid model. LENS offers opportunities to repair and modify components by adding features to existing geometry, refilling holes, repairing weld lips, and many other potential applications. The material deposited has good mechanical properties with strengths typically slightly higher that wrought material due to grain refinement from a quickly cooling weld pool. The result is a material with properties similar to cold worked material, but without the loss in ductility traditionally seen with such treatments. Furthermore, 304L LENS material exhibits good corrosion resistance and hydrogen compatibility. This report gives a background of the LENS process including materials analysis addressing the requirements of a number of different applications. Suggestions are given to aid both the product engineer and the process engineer in the successful utilization of LENS for their applications. The results of testing on interface strength, machinability, weldability, corrosion resistance, geometric effects, heat treatment, and repair strategy testing are all included. Finally, the qualification of the LENS process is briefly discussed to give the user confidence in selecting LENS as the process of choice for high rigor applications. The testing showed LENS components to have capability in repair/modification applications requiring complex castings (W80-3 D-Bottle bracket), thin wall parts requiring metal to be rebuilt onto the part (W87 Firing Set Housing and Y-12 Test Rings), the filling of counterbores for use in reservoir reclamation welding (SRNL hydrogen compatibility study) and the repair of surface defects on pressure vessels (SRNL gas bottle repair). The material is machinable, as testing has shown that LENS deposited material machines similar to that of welded metal. Tool wear is slightly higher in LENS material than in wrought material, but not so much that one would be concerned with increased tooling cost. The LENS process achieved process qualification for the AY1E0125 D-Bottle Bracket from the W80-3 LEP program, and in the effort, also underwent testing in weapons environments. These tests included structural dynamic response testing and drop testing. The LENS deposited parts were compared in these tests with conventionally machined parts and showed equivalency to such an extent that the parts were accepted for use in parallel path subsystem-level weapon environment testing. The evaluation of LENS has shown that the process can be a viable option when either complete metal parts are needed or existing metal parts require modification or repair. The LENS Qualification Technology Investment team successfully investigated new applications for the LENS process and showed that it has great applicability across the Nuclear Weapons Complex as well as in other high rigor applications.
Smugeresky, John E. (Sandia National Laboratories, Livermore, CA); Gill, David Dennis; Oberhaus, Jason (BWXT Y-12); Adams, Thad (Savannah River National Laboratory); VanCamp, Chad (Kansas City Plant)
Guide for Determining Motor Repair versus Motor Replacement
The Motor Replacement/Refurbishment Guide (MRRG) was written to aid with the determination on whether to repair an existing motor or to purchase a replacement motor. This guideline provides the basic tools necessary to make a determination based upon, but not limited to, the extent of the repair scope and the cost of the repair. This guideline presents a process to be utilized by the station or corporate motor specialist to assess the motor repair scope both initial and revised. The data gathering proces...
Low Dose Radiation Research Program: Quantification of Repair...
Quantification of Repair of Low-Dose-Induced DNA Double-Strand Breaks in Diploid Human Cells David Schild Lawrence Berkeley National Laboratory Berkeley, California Why this...
Lower power prices and high repair costs drive nuclear retirements ...
U.S. Energy Information Administration (EIA)
However, concerns over the length of the review process and the high costs associated with steam generator repairs led SCE to retire both reactors.
Federal Facilities Maintenance, Repair Report Calls for Action
This article is an overview of a recent report by the Federal Facilities Council on "Predicting Outcomes from Investments in Maintenance and Repair of Federal Facilities."
Bartlett, Rosemarie
Classifying aging genes into DNA repair or non-DNA repair-related categories
The elderly population in almost every country is growing faster than ever before. However, our knowledge about the aging process is still limited despite decades of studies on this topic. In this report, we focus on the gradual accumulation of DNA damage ... Keywords: DNA-repair, aging, classification, feature selection, random forest
Yaping Fang, Xinkun Wang, Elias K. Michaelis, Jianwen Fang
Repair worlds: maintenance, repair, and ICT for development in rural Namibia
This paper explores the nature and centrality of maintenance and repair ('M&R') work in the extension and sustainability of ICT infrastructure in the global South. Drawing from pragmatist traditions in CSCW and the social sciences at large, we develop ... Keywords: ethnography, ictd, infrastructure, maintenance, theory
Steven J. Jackson; Alex Pompe; Gabriel Krieshok
institution Naval Facilities Engineering Command Engineering...
will investigate whether a BIPV roof system is structurally sound should not leak for years under normal maintenance and repair and can provide large scale on site renewable...
Structural Repairs for Transmission Structures: Anchors, Poles, and Lattice Construction
This document provides a brief overview of repair methods for transmission line lattice and pole structures and provides guidance on the complex financial issue of how to determine whether a corrosion repair should be accounted for as capital or expense.� �BackgroundAs the North American electrical transmission system ages, many issues have to be addressed to keep the system functioning. The high voltage ...
Engines - Spark Ignition Engines - Hydrogen Engines
large-scale hydrogen infrastructure by using the well-known and widely used internal combustion engine as the device that transforms the energy stored in hydrogen into motion. The...
Information engineering
The Information Engineering thrust area develops information technology to support the programmatic needs of Lawrence Livermore National Laboratory`s Engineering Directorate. Progress in five programmatic areas are described in separate reports contained herein. These are entitled Three-dimensional Object Creation, Manipulation, and Transport, Zephyr:A Secure Internet-Based Process to Streamline Engineering Procurements, Subcarrier Multiplexing: Optical Network Demonstrations, Parallel Optical Interconnect Technology Demonstration, and Intelligent Automation Architecture.
Hunt, D.N.
General Engineers
U.S. Energy Information Administration (EIA) Indexed Site
General Engineers General Engineers The U.S. Energy Information Administration (EIA) within the Department of Energy has forged a world-class information program that stresses quality, teamwork, and employee growth. In support of our program, we offer a variety of profes- sional positions, including the General Engineer, whose work is associated with analytical studies and evaluation projects pertaining to the operations of the energy industry. Responsibilities: General Engineers perform or participate in one or more of the following important functions: * Design modeling systems to represent energy markets and the physical properties of energy industries * Conceive, initiate, monitor and/or conduct planning and evaluation projects and studies of continuing and future
Development of a composite repair system for reinforcing offshore risers
A research program was conducted to investigate the application of composite materials in repairing corroded offshore risers, leading to the development of an optimized repair using a hybrid carbon/E-glass system. The objective of this research program was to investigate the feasibility of extending onshore composite repair techniques to offshore risers by developing integrated analytical and experimental methods. The study considered loads typical for offshore risers including internal pressure, tension, and bending. To fulfill this objective efforts included a state of the art assessment of current composite repair technology, designing a carbon-based composite repair system optimized by numerical simulation with prototype testing, and providing guidelines for industry in repairing and reinforcing offshore risers using composite materials. Research efforts integrated numerical modeling, as well as full-scale testing that included four composite repair manufacturers to assess the current state of the art on pipe samples with simulated corrosion reinforced with composite materials. Analysis and testing were also performed on the optimized carbon/E-glass system. The results of this program demonstrated that composite materials are a viable means for repairing corroded offshore steel risers as adequate reinforcement ensures that the steel risers are not loaded beyond acceptable design limits. For corroded risers, the results demonstrated through analysis and full-scale testing efforts that properly designed composite repair systems can provide adequate structural reinforcement to ensure that excessive strains are not induced in the steel when subjected to internal pressure, axial tension, and bending design loads. This was verified experimentally using strain gages placed beneath the composite repair. This program is the first of its kind and is thought to contribute significantly to the future of offshore riser repairs. It is likely that the findings of this program will foster future investigations involving operators by integrating their insights regarding the need for composite repair based on emerging technology. One of the most significant contributions to the existing body of work is the use of limit analysis in developing design limits for the repair of steel pipes using composite materials.
Alexander, Christopher Richard
Low-Voltage Cable Aging Management Guidance
This report, intended for use by power plant engineers and craft and administrative personnel who are responsible for cable system aging management, provides guidance on the effective and efficient application of current information and techniques related to aging and condition monitoring (CM) of low-voltage cables. The identification of cables that are prone to early aging and the timely replacement or repair of cables that are degraded will minimize unnecessary power losses, unplanned shutdowns, ...
CHEMICAL ENGINEERING AND MANUFACTURING CHEMICAL ENGINEERING Objective Chemical Engineers of chemicals. This lesson introduces students to one component of chemical engineering: food processing, and a chemical engineer 2. How chemical engineers are involved in food production 3. That chemical engineers need
Provancher, William
College of Engineering Profile The College of Engineering at Colorado
College of Engineering Profile 2007-2008 The College of Engineering at Colorado State has a strong and Biological Engineering Civil and Environmental Engineering Electrical and Computer Engineering Mechanical Programs: Chemical and Biological Engineering Civil Engineering Computer Engineering Electrical Engineering
NEWTON's Engineering References
engineering content for K-12 teachers. There are activities, lessons, and curriculum designed to introduce your students to engineering. ENGINEERING.com ENGINEERING.com...
Web engineering
Web Engineering is the application of systematic, disciplined and quantifiable approaches to development, operation, and maintenance of Web-based applications. It is both a pro-active approach and a growing collection of theoretical and empirical research ... Keywords: development methodologies, taxonomy of Web applications, web Engineering, web application development, web-based information systems
Yogesh Deshpande; San Murugesan; Athula Ginige; Steve Hansen; Daniel Schwabe; Martin Gaedke; Bebo White
Guidelines for the Repair of Nuclear Power Plant Safety-Related Motors (NCIG-12)
These guidelines, the twelfth in a series cosponsored by NCIG, provide utilities with information on the repair of all classes of safety-related electric motors. Use of this information will permit capable repair shops to repair motors under the extension of utility quality assurance programs or by dedication of a commercially repaired motor.
Competing risks for repairable systems: A data study
". The maintainable items making up the compressor unit are, among others, valves, internal piping and radial bearing by the corresponding repair. We will therefore follow the OREDA Handbook and make our analysis at the subunit level
Langseth, Helge
Checkpoint repair for out-of-order execution machines
Out-of-order execution and branch prediction are two mechanisms that can be used profitably in the design of Supercomputers to increase performance. Unfortunately this means there must be some kind of repair mechanism, since situations do occur that ...
W. W. Hwu; Y. N. Patt
Solar Water Heating System Maintenance and Repair | Department of Energy
Water Heating System Maintenance and Repair Water Heating System Maintenance and Repair Solar Water Heating System Maintenance and Repair May 30, 2012 - 2:35pm Addthis Rooftop solar water heaters need regular maintenance to operate at peak efficiency. | Photo from iStockphoto.com Rooftop solar water heaters need regular maintenance to operate at peak efficiency. | Photo from iStockphoto.com Solar energy systems require periodic inspections and routine maintenance to keep them operating efficiently. Also, from time to time, components may need repair or replacement. You should also take steps to prevent scaling, corrosion, and freezing. You might be able to handle some of the inspections and maintenance tasks on your own, but others may require a qualified technician. Ask for a cost estimate in writing before having any work done. For some systems, it may
Geothermal Well Maintenance and Repair in Cerro Prieto
When the first well is drilled at a geothermal field, procedures for the cleaning, repair, and control of wells should be established. This aspect will be increasingly important as more wells are drilled. Equipment, tools and techniques need to be improved to achieve economic and safe results. Different systems have been developed and applied in maintenance of wells, in problems of casing incrustations, repairs, plugging, and well control. These systems should be improved, even though they have been reasonably satisfactory to date.
Aguirre, B. D.; Blanco, F. V.
Steam Turbine Casing and Valve Body Repair Guidelines
Today�s flexible mode of operation can result in damage to heavy-section components, such as steam turbine and valve casings. Thus, owners and operators are often faced with repairing a critical component. This report is part of a set of documents that address the key areas in the asset management of steam turbine casings and valve bodies�nondestructive evaluation and damage detection, repair, and life ...
On site ESP repair pays off in Indonesia
This paper discusses how extensive production and use of electric submersible pumps (ESPs) in a remote region of Southeast Asia prompted an oil company to establish its own ESP repair facility. The facility has met three defined objectives, and the scope of its work has been expanded. However, several elements must be present before such a remote operation can be successful. This repair facility is at the Kasim Marine Terminal in Irian Jaya.
Haines, J.D. (Southeast Asia Corp., Applied Technics, Skiatook, OK (US)); Langnes, G.L. (Dragon Pacific Offshore Services PTE, Ltd. (SG)); Hadipoetro, H. (Petromer Trend Corp., Kasmim Marine Terminal, Irian Jaya (ID))
Engineering Emergence
We explore various definitions and characteristics of emergence, how we might recognise and measure emergence, and how we might engineer emergent systems. We discuss the TUNA ("Theory Underpinning Nanotech Assemblers") project, which is investigating ...
Susan Stepney; Fiona A. C. Polack; Heather R. Turner
Harmonic engine
A high efficiency harmonic engine based on a resonantly reciprocating piston expander that extracts work from heat and pressurizes working fluid in a reciprocating piston compressor. The engine preferably includes harmonic oscillator valves capable of oscillating at a resonant frequency for controlling the flow of working fluid into and out of the expander, and also preferably includes a shunt line connecting an expansion chamber of the expander to a buffer chamber of the expander for minimizing pressure variations in the fluidic circuit of the engine. The engine is especially designed to operate with very high temperature input to the expander and very low temperature input to the compressor, to produce very high thermal conversion efficiency.
Bennett, Charles L. (Livermore, CA)
COMPUTER ENGINEERING EECS Department
COMPUTER ENGINEERING EECS Department The Electrical Engineering and Computer Science (EECS) Department at WSU offers undergraduate degrees in electrical engineering, computer engineering and computer science. The EECS Department offers Master of Science degrees in computer science, electrical engineering
Biochemical characterization of the E. coli Very Short Patch Repair pathway and its coordination with methyltransferase repair of 0?-methylguanine
The E. coli Very Short Patch Repair (VSPR) system corrects T:G mismatches that arise through Dcm-mediated methylation and subsequent deamination of the underlined cytosine residue in the palindromic sequence 5'-CCWGG-3' ...
Rye, Peter Thomas
Exposure Evaluation for Benzene, Lead and Noise in Vehicle and Equipment Repair Shops
An exposure assessment was performed at the equipment and vehicle maintenance repair shops operating at the U. S. Department of Energy Hanford site, in Richland, Washington. The maintenance shops repair and maintain vehicles and equipment used in support of the Hanford cleanup mission. There are three general mechanic shops and one auto body repair shop. The mechanics work on heavy equipment used in construction, cranes, commercial motor vehicles, passenger-type vehicles in addition to air compressors, generators, and farm equipment. Services include part fabrication, installation of equipment, repair and maintenance work in the engine compartment, and tire and brake services. Work performed at the auto body shop includes painting and surface preparation which involves applying body filler and sanding. 8-hour time-weighted-average samples were collected for benzene and noise exposure and task-based samples were collected for lead dust work activities involving painted metal surfaces. Benzene samples were obtained using 3M� 3520 sampling badges and were analyzed for additional volatile organic compounds. These compounds were selected based on material safety data sheet information for the aerosol products used by the mechanics for each day of sampling. The compounds included acetone, ethyl ether, toluene, xylene, VM&P naphtha, methyl ethyl ketone, and trichloroethylene. Laboratory data for benzene, VM&P naphtha, methyl ethyl ketone and trichloroethylene were all below the reporting detection limit. Airborne concentrations for acetone, ethyl ether, toluene and xylene were all less than 10% of their occupational exposure limit. The task-based samples obtained for lead dusts were submitted for a metal scan analysis to identify other metals that might be present. Laboratory results for lead dusts were all below the reporting detection limit and airborne concentration for the other metals observed in the samples were less than 10% of the occupational exposure limit. Noise dosimetry sampling was performed on a random basis and was representative of the different work activities within the four shops. Twenty three percent of the noise samples exceeded the occupational exposure limit of 85 decibels for an 8-hour time-weightedaverage. Work activities where noise levels were higher included use of impact wrenches and grinding wheels.
Sweeney, Lynn C.
Recombinant methods for screening human DNA excision repair proficiency
A method for measuring DNA excision repair in response to ultraviolet radiation (UV)-induced DNA damage has been developed, validated, and field-tested in cultured human lymphocytes. The methodology is amenable to population-based screening and should facilitate future epidemiologic studies seeking to investigate associations between excision repair proficiency and cancer susceptibility. The impetus for such endeavors derives from the belief that the high incidence of skin cancer in the genetic disorder xeroderma pigmentosum (XP) primarily is a result of the reduced capacity of patients cells to repair UV-induced DNA damage. For assay, UV-irradiated non-replicating recombinant plasmid DNA harboring a chloramphenicol acetyltransferase (CAT) indicator gene is introduced into lymphocytes using DEAE-dextran short-term transfection conditions. Exposure to UV induces transcriptionally-inactivating DNA photoproducts in the plasmid DNA which inactivate CAT gene expression. Excision repair of the damaged CAT gene is monitored indirectly as a function of reactivated CAT enzyme activity following a 40 hour repair/expression incubation period.
Athas, W.F.
Polymer nanocomposites for high-temperature composite repair
A novel repair agent for resin-injection repair of advanced high temperature composites was developed and characterized. The repair agent was based on bisphenol E cyanate ester (BECy) and reinforced with alumina nanoparticles. To ensure good dispersion and compatibility with the BECy matrix in nanocomposites, the alumina nanoparticles were functionalized with silanes. The BECy nanocomposites, containing bare and functionalized alumina nanoparticles, were prepared and evaluated for their thermal, mechanical, rheological, and viscoelastic properties. The monomer of BECy has an extremely low viscosity at ambient temperature, which is good for processability. The cured BECy polymer is a highly cross-linked network with excellent thermal mechanical properties, with a high glass transition temperature (T{sub g}) of 270 C and decomposition temperature above 350 C. The incorporation of alumina nanoparticles enhances the mechanical and rheological properties of the BECy nanocomposites. Additionally, the alumina nanoparticles are shown to catalyze the cure of BECy. Characterization of the nanocomposites included dynamic mechanical analysis, differential scanning calorimetry, thermogravimetric analysis, rheological and rheokinetic evaluation, and transmission electron microscopy. The experimental results show that the BECy nanocomposite is a good candidate as repair agent for resin-injection repair applications.
Sheng, Xia
Meta search engine.
??Meta search engines allow multiple engine searches to minimize biased information and improve the quality of the results it generates. However, existing meta engine applications� (more)
Chan, Kwok-Pun
Brookhaven Women Engineers' Network
Home | Mission | Other links BWEN Brookhaven Women Engineers' Network BNLlogo Brookhaven Women Engineers' Network Network for professionals in engineering, computing and...
Simple Maintenance Saves Costly Furnace Repair/Replacement | Department of
Simple Maintenance Saves Costly Furnace Repair/Replacement Simple Maintenance Saves Costly Furnace Repair/Replacement Simple Maintenance Saves Costly Furnace Repair/Replacement January 6, 2010 - 8:26am Addthis Chris Stewart Senior Communicator at DOE's National Renewable Energy Laboratory For the past few weeks, my forced-air gas furnace has been on the fritz. I blame this on the fact that I haven't been as diligent as I should have been with regular furnace maintenance, which includes: Checking the condition of the vent connection pipe and chimney Checking the physical integrity of the heat exchanger Adjusting the controls to provide optimum water and air temperature settings for both efficiency and comfort Having a technician perform a combustion-efficiency test Checking the combustion chamber for cracks. Testing for carbon monoxide
Protein Bridges DNA Base and Nucleotide Excision Repair Pathways
Protein Bridges DNA Base and Protein Bridges DNA Base and Nucleotide Excision Repair Pathways Protein Bridges DNA Base and Nucleotide Excision Repair Pathways Print Wednesday, 28 October 2009 00:00 Alkyltransferase proteins (AGT) protect cells from the biological effects of DNA damage caused by the addition of alkyl groups (alkylation). Alkyltransferase-like proteins (ATLs) can do the same, but they lack the reactive cysteine residue that allows the alkyltransferase function, and the mechanism for cell protection has remained unknown. To address this mystery, a British-American team lead by researchers at the Scripps Research Institute recently applied a combination of x-ray structural, biochemical, and genetic studies to ATLs in the yeast Schizosaccharomyces pombe without and with damaged DNA. By showing how a process called non-enzymatic nucleotide flipping activates ATL-initiated DNA repair, their results may improve our understanding of genomic integrity and responses to DNA damage relevant to pathogens and cancer development.
Protein Bridges DNA Base and Nucleotide Excision Repair Pathways Print Protein Bridges DNA Base and Nucleotide Excision Repair Pathways Print Alkyltransferase proteins (AGT) protect cells from the biological effects of DNA damage caused by the addition of alkyl groups (alkylation). Alkyltransferase-like proteins (ATLs) can do the same, but they lack the reactive cysteine residue that allows the alkyltransferase function, and the mechanism for cell protection has remained unknown. To address this mystery, a British-American team lead by researchers at the Scripps Research Institute recently applied a combination of x-ray structural, biochemical, and genetic studies to ATLs in the yeast Schizosaccharomyces pombe without and with damaged DNA. By showing how a process called non-enzymatic nucleotide flipping activates ATL-initiated DNA repair, their results may improve our understanding of genomic integrity and responses to DNA damage relevant to pathogens and cancer development.
RECORD OF CATEGORICAL EXCLUSION DETERMINATION Hygiene Substation Access Road Repairs
Hygiene Substation Access Road Repairs Hygiene Substation Access Road Repairs A. Brief Description of Proposal: Western Area Power Administration proposes to repair the access road/driveway into the Hygiene Substation. There is a low spot in the middle of the driveway that impedes maneuvering oflarge maintenance equipment in and out of the yard. Western plans to fill the low spot with road base and crumbled concrete fill. The Hygiene Substation is located in Boulder County, approximately 2 miles northwest of Longmont, CO (T3N, R69W, Sec 18). All proposed construction will occur within the existing, disturbed substation access road/driveway. B. Number and Title of tile Categorical Exclusion Being Applied: (See text in 10 CFR 1021, Subpart D.) BI.3 Routine maintenance activities and custodial services for buildings, structures,
Welding and Repair Technology Center: Alternative Rules for Temperbead Qualification
Temperbead welding is common practice in the nuclear power industry for in situ repair of quenched and tempered low-alloy steels when post-weld heat treatment is impractical. The temperbead process controls the heat input so that the weld heat-affected zone in the low-alloy steel is tempered by the welding heat of subsequent layers. The tempering achieved in this way eliminates the need for post-weld heat treatment. Unfortunately, repair organizations in the nuclear power industry are ...
Engineered Fire Safety Group
Engineered Fire Safety Group. Welcome. ... Employment/Research Opportunities. Contact. Jason Averill, Leader. Engineered Fire Safety Group. ...
Engineers Constructors
Office of Legacy Management (LM)
Engineers Engineers - Constructors ~ /:~ ( ' r,.... I!~\ l.,_",z;(J;' Bechtel National, Inc. Oak Ridge Office Jackson Plaza Tower 800 Oak Ridge Turnpike Oak Ridge. Tennessee Mail Address: P. O. B01l 350. Oak Ridge. TN 37830 bce-. R. Barber C. t1iller E. Wal ker C. Knoke G. Phillips G. Scott L. Blevins K. Harer DOE File No. 030-04G Professional Land Surveying 1404 Second Street Santa Fe, New Mexico 87501 Attn: Mr. Robert Benavides Reference: Purchase Contract l4501-01j04-PC-19 Bayo Canyon Survey Dear Mr. Benavides: The following are clarifications to the referenced contract specification. The need for clarification to the specification arises from the fact that the Bayo Canyon site is transected by a corporate boundary, the Los Alamos County-Santa Fe County line. This condition affects three items in the specification Scope Of Work: Item 1.2.5, the as-built site plan of the Bayo
Engines - Spark Ignition Engines - Direct Injection - Omnivorous Engine
Direct Injection, Spark-Ignited Engines Direct Injection, Spark-Ignited Engines Omnivorous Engine Omnivorous Engine Setup Omnivorous Engine Setup New engine technology has made possible engines that will operate on a wide variety of fuel inputs, from gasoline to naptha to ethanol to methanol, without driver intervention. Although flexible fuel vehicles have been produced in the millions, their engines have always been optimized for gasoline operation while accepting significant performance and efficiency degradations when using the alternative fuel. This project seeks to combine in-cylinder measurement technology, and advanced controls to optimize spark timing, the quantity and timing of injected fuel, to produce an "omnivorous engine"--one that will be able to run on any liquid spark ignition fuel with optimal efficiency and low
Description of Past Research: Fossil Materials and Repair (Program 87): 2012 Update
The Electric Power Research Institute�s (EPRI�s) Fossil Materials and Repair Program (Program�87) within Major Component Reliability provides integrated materials selection guidance, information about repair technology, and corrosion mitigation methods to improve equipment performance, reliability, and profitability. The program has produced numerous material and repair guidelines and handbooks for application with steam boilers, steam ...
Proceedings: Welding and Repair Technology for Power Plants: Second International Conference
The conference on welding and repair technology for power plants included presentations of case histories, emerging welding technologies, and demonstrated repair techniques and approaches. These proceedings provide technical information discussed at the conference on the repair of turbine rotors, disks, blades, piping, steam generators, headers, reactor pressure vessel internals, valves, pumps, and other components.
Welding and Repair Technology for Power Plants: Fourth RRAC International Conference
The Fourth International Conference on Welding and Repair Technology for Power Plants included presentations of case histories and emerging welding technologies and demonstrations of repair techniques and approaches. These proceedings provide technical information discussed during this conference regarding the repair of steam turbine rotors, discs, blades, piping, steam generators, headers, reactor pressure vessel internals, valves, pumps, combustion turbines, and other components. Sessions included nucl...
Thermosetting Polymer-Matrix Composites for Strucutral Repair Applications
Several classes of thermosetting polymer matrix composites were evaluated for use in structural repair applications. Initial work involved the characterization and evaluation of woven carbon fiber/epoxy matrix composites for structural pipeline repair. Cyanate ester resins were evaluated as a replacement for epoxy in composites for high-temperature pipe repair applications, and as the basis for adhesives for resin infusion repair of high-temperature composite materials. Carbon fiber/cyanate ester matrix composites and fumed silica/cyanate ester nanocomposites were evaluated for their thermal, mechanical, viscoelastic, and rheological properties as they relate to their structure, chemistry, and processing characteristics. The bisphenol E cyanate ester under investigation possesses a high glass transition temperature, excellent mechanical properties, and unique ambient temperature processability. The incorporate of fumed silica served to enhance the mechanical and rheological properties of the polymer and reduce thermal expansion without sacrificing glass transition or drastically altering curing kinetics. Characterization of the composites included dynamic mechanical analysis, thermomechanical analysis, differential scanning calorimetry, thermogravimetric analysis, rheological and rheokinetic evaluation, and transmission electron microscopy.
William Kirby Goertzen
Charge transport-mediated recruitment of DNA repair enzymes
Damaged or mismatched bases in DNA can be repaired by Base Excision Repair (BER) enzymes that replace the defective base. Although the detailed molecular structures of many BER enzymes are known, how they colocalize to lesions remains unclear. One hypothesis involves charge transport (CT) along DNA [Yavin, {\\it et al.}, PNAS, {\\bf 102}, 3546, (2005)]. In this CT mechanism, electrons are released by recently adsorbed BER enzymes and travel along the DNA. The electrons can scatter (by heterogeneities along the DNA) back to the enzyme, destabilizing and knocking it off the DNA, or, they can be absorbed by nearby lesions and guanine radicals. We develop a stochastic model to describe the electron dynamics, and compute probabilities of electron capture by guanine radicals and repair enzymes. We also calculate first passage times of electron return, and ensemble-average these results over guanine radical distributions. Our statistical results provide the rules that enable us to perform implicit-electron Monte-Carlo simulations of repair enzyme binding and redistribution near lesions. When lesions are electron absorbing, we show that the CT mechanism suppresses wasteful buildup of enzymes along intact portions of the DNA, maximizing enzyme concentration near lesions.
Pak-Wing Fok; Chin-Lin Guo; Tom Chou
Troubleshooting, Maintaining, and Repairing Personal Computers: A Technician's Guide
From the Publisher:Efficient, cost-effective troubleshooting and repair techniques in the ultimate hands-on reference for technicians. With this book and your technical skills, there is no computer problem you can't correct. You'll find nearly 400 problems ...
Stephen J. Bigelow
SOLERAS - Analysis of photovoltaic concentrator module failures and repair methods
This report presents the results of the failure analysis, performed from early 1984 through September 1986 on the open-circuited modules, and the assessment of repairing these modules on site at the Solar Village. 16 refs., 26 figs., 19 tabs.
Huraib, F.S.; Imamura, M.S.; Salim, A.A.; Rao, N.R.
30 CHEMICAL ENGINEERING SCHOOL OF ENGINEERING & APPLIED SCIENCE MIAMI UNIVERSITY 2005-2006 The program leads to the degree, Bachelor of Science in Applied Science, with a major in Chemical Engineering The chemical engineering students learn to apply the concepts of chemistry, biochemistry and biological science
Dollar, Anna
Dept. of Mechanical Engineering 1500 Engineering Dr.
of Diesel Engine, Exhaust System, Engine Emissions and Aftertreatment Device Models," SAE Paper 2005 Engine, Emissions, and Exhaust Aftertreatment System Level Model to Simulate Diesel Particulate Filter Diesel Engine, Emissions, and Exhaust Aftertreatment System Level Model," SAE 2009-01-1511, SAE
Sheridan, Jennifer
A tribological and biomimetic study of potential bone joint repair materials
This research investigates materials for bone-joint failure repair using tribological and biomimicking approaches. The materials investigated represent three different repairing strategies. Refractory metals with and without treatment are candidates for total joint replacements due to their mechanical strength, high corrosion resistance and biocompatibility. A composite of biodegradable polytrimethylene carbonate, hydroxyl apatite, and nanotubes was investigated for application as a tissue engineering scaffold. Non-biodegradable polymer polyimide combined with various concentrations of nanotubes was investigated as a cartilage replacement material. A series of experimental approaches were used in this research. These include analysis of material surfaces and debris using high-resolution techniques and tribological experiments, as well as evaluation of nanomechanical properties. Specifically, the surface structure and wear mechanisms were investigated using a scanning electron microscope and an atomic force microscope. Debris morphology and structure was investigated using a transmission electron microscope. The debris composition was analyzed using an X-ray diffractometer. Nanoindentation was incorporated to investigate the surface nanomechanical properties. Polytrimythelene carbonate combined with hydroxyapatite and nanotubes exhibited a friction coefficient lower than UHMWPE. The nanoindentation response mimicked cartilage more closely than UHMWPE. A composite formed with PI and nanotubes showed a varying friction coefficient and varying nanoindentation response with variation in nanotube concentration. Low friction coefficients corresponded with low modulus values. A theory was proposed to explain this behavior based on surface interactions between nanotubes and between nanotubes and PI. A model was developed to simulate the modulus as a function of nanotube concentration. The boronized refractory metals exhibited brittleness and cracking. Higher friction coefficients were associated with the formation of amorphous debris. The friction coefficient for boronized Cr (~0.06) under simulated body fluid conditions was in the range found in natural joints.
Ribeiro, Rahul
A multi-agent simulation system for prediction and scheduling of aero engine overhaul
The Aero Repair and Overhaul industry is facing an increasing challenge of prediction and scheduling of engine overhauls to remain competitive in a complex business arena. An appropriate technology solution is required to achieve efficient schedules while satisfying multiple opposing constraints in a highly dynamic environment. In this paper, we describe Overhaul Prediction and Scheduling, an agentbased simulator developed to tackle this challenge. Using negotiation strategies, it deals with the multi-dimensional scheduling optimisation problem by trading off repair costs, capacity and capability of overhaul bases, among others, in light of in-service unforseen events. It supports effective strategic decision-making via business scenario modelling.
Armin Stranjak; Partha Sarathi Dutta; Mark Ebden; Alex Rogers; Perukrishnen Vytelingum
Engineering Fundamentals - Electrical Engineering, Version 2.0
Engineering Fundamentals � Electrical Engineering (EF-EE) covers the basics of electrical engineering topics. The module provides information about basic electrical engineering terms and concepts that help identify ...
Nature-Inspired Hybrid Structural Materials for Bone Repair
Fabrication of a Cellulosic Nanocomposite Scaffold with Improved Supermolecular Structure as a Potential Cardiovascular Tissue-Engineered Graft .
Renewable Energy Engineering
MSc in Renewable Energy Engineering School of Engineering www.cranfield.ac.uk/soe/renewableenergy #12;Postgraduate study Cranfield University 2 School of Engineering MSc in Renewable Energy Engineering Renewable Energy Engineering MSc in Climate change, growing world populations and limited fossil
Chemical engineering Research !!
Chemical engineering Research !! www.chemeng.lth.se Updated August 2012 #12;WWT Fermentation University/Faculty of Engineering-LTH/Department of Chemical Engineering Membrane Group Ann-Sofi Jönsson More research projects. #12;Lund University/Faculty of Engineering-LTH/Department of Chemical Engineering
Solar Cells, Wound Repair Winning GVC Technologies | ornl.gov
Solar Cells, Wound Repair Winning GVC Technologies Solar Cells, Wound Repair Winning GVC Technologies March 26, 2010 Graduate student teams from the University of Arkansas and the University of Maryland earned first place in the energy and security categories at the 2010 GVC hosted by ORNL March 24-26. The competition, in its fourth year, attracts students developing new technologies and venture investors with expertise in the market. The first-prize winners each received $25,000. Douglas Hutchings, Stephen Ritterbush, and Seth Shumate from Arkansas won first place in the energy division for Silicon Solar Solutions. "Our method replaces the expensive top layer of solar cells with a thinner, large-grain polysilicon at lower temperatures, which reduces cost and is appealing to manufacturers," said Ritterbush.
Science Technology Engineering Math Science Technology Engineering Math Mechanical Engineering Aerospace Engineering
Science Technology Engineering Math Science Technology Engineering Math Mechanical Engineering Loop glider Airboat Straw rockets College Class Science Activity Stomp rockets Underwater copters AND/OR Circuits College Class Science Activity Electronic T/F Motorized flying gliders
Rohs, Remo
DOE Solar Decathlon: Engineering
U.S. Department of Energy Solar Decathlon Contests Engineering The U.S. Department of Energy Solar Decathlon houses represent the best of modern engineering. For the Engineering...
Stirling Engine Assessment
Stirling engines are reciprocating engines that are fueled by an external heat source. This report presents a summary of the technical trends, commercialization status, and economic viability of Stirling engine technology for distributed generation (DG) applications.
DSS for rescheduling of railway services under unplanned events
In the daily activity of railway transport, the need to make decisions when faced with unforeseen incidents is a common event. Quality of service my be affected by decisions that are made by delays or cancellations. In this multiobjective scenario, there ...
B. Adenso-D�az; J. Tuya; M. J. Su�rez-Cabal; M. Goitia-Fuertes
In Situ Temporary Repair of Thermal Barrier Coatings
The durability of thermal barrier coatings (TBCs) on combustion turbine blades and vanes is a critical issue in the power generation industry. Degradation of TBCs occur by the spallation of the ceramic layer � partially stabilized zirconia (PSZ) � that resides on the Al2O3-covered MCrAlY bondcoat. In the event of such local failures of the TBC, a quick in-situ technique to repair the coating would be desirable.
Development of Methods to Repair Header Stub Tube Bends
Repair of flow-accelerated corrosion damage in bent header stub tubes in heat recovery steam generators (HRSGs) is normally accomplished by spreading tubing pendants to gain access, cutting your way in and welding your way out, or plugging damaged tubing. The technology described in this report is being developed to enable the replacement of damaged tubing in a method that will dramatically reduce change-out time in the event of a failure.
HRSG Repair Welding Technologies to Address FAC in Tube Bends
Tube failures that occur in heat recovery steam generators (HRSGs) are often caused by thermal stress or thermal shock associated with cyclic plant operation or by flow-accelerated corrosion. Many premature failures occur along the length of finned tubes or at attachment locations where tubes are joined to the upper or lower header. Because of current tube repair practices and limited access for welding, reoccurring failures are common.
Repair Welding Technologies For Heat Recovery Steam Generators
Repair and Replacement Applications Center Joint Welding Procedure Qualification Program
At the request of the EPRI Repair and Replacement Applications Center subscribers, a Joint Welding Procedure Qualification Program was developed to provide a medium whereby multiple utilities can share in the qualification of specific welding procedures. The program was developed in such a manner that it will supplement existing utility welding qualification programs. Specifically the program incorporates the more stringent attributes of each utility's internal welding program while meeting the individua...
Engineering Experimentation - Nuclear Engineering Division (Argonne...
such as corrosivehazardous materials, high-temperature structural integrity, and remote handling. More... NE Departments involved: Engineering Development and...
Ultimate search engine.
??The search engine is a tool designed to search for information on the web according to the keywords specified by users. Different search engines are� (more)
Patel, Chirag
1998 Environmental Monitoring Program Report for the Idaho National Engineering and Environmental Laboratory
This report describes the calendar year 1998 compliance monitoring and environmental surveillance activities of the Lockheed Martin Idaho Technologies Company Environmental Monitoring Program performed at the Idaho National Engineering and Environmental Laboratory. This report includes results of sampling performed by the Drinking Water, Effluent, Storm Water, Groundwater Monitoring, and Environmental Surveillance Programs. This report compares the 1998 results to program-specific regulatory guidelines and past data to evaluate trends. The primary purposes of the monitoring and surveillance activities are to evaluate environmental conditions, to provide and interpret data, to verify compliance with applicable regulations or standards, and to ensure protection of public health and the environment. Surveillance of environmental media did not identify any previously unknown environmental problems or trends, which would indicate a loss of control or unplanned releases from facility operations. The INEEL complied with permits and applicable regulations, with the exception of nitrogen samples in a disposal pond effluent stream and iron and total coliform bacteria in groundwater downgradient from one disposal pond. Data collected by the Environmental Monitoring Program demonstrate that the public health and environment were protected.
L. V. Street
1997 LMITCO Environmental Monitoring Program Report for the Idaho National Engineering and Environmental Laboratory
This report describes the calendar year 1997 environmental surveillance and compliance monitoring activities of the Lockheed Martin Idaho Technologies Company Environmental Monitoring Program performed at the Idaho National Engineering and Environmental Laboratory. This report includes results of sampling performed by the Radiological Environmental Surveillance, Site Environmental Surveillance, Drinking Water, Effluent Monitoring, Storm Water Monitoring, Groundwater Monitoring, and Special Request Monitoring Programs and compares 1997 data with program-specific regulatory guidelines and past data to evaluate trends. The primary purposes of the surveillance and monitoring activities are to evaluate environmental conditions, to provide and interpret data, to verify compliance with applicable regulations or standard, and to ensure protection of human health and the environment. Surveillance of environmental media did not identify any previously unknown environmental problems or trends indicating a loss of control or unplanned releases from facility operations. With the exception of one nitrogen sample in the disposal pond effluent stream and iron and total coliform bacteria in groundwater downgradient from one disposal pond, compliance with permits and applicable regulations was achieved. Data collected by the Environmental Monitoring Program demonstrate that public health and the environment were protected.
Andersen, B.; Street, L.; Wilhelmsen, R.
HCCI engine control and optimization
natural gas engine setup for stationary power generation. . . . . . . . . . .natural gas engine setup for stationary power generation.
Killingsworth, Nicholas J.
Consolidation on civil engineering and technical infrastructure
The use and age of the civil engineering structure (office buildings, halls, tunnels) and of tertiary technical equipment (mainly HVAC and electricity) at CERN is such that their renovation must be considered in the near future. Due to the large number of buildings and equipment in these conditions, and the restricted budget available it is extremely important to define priorities. The aim of this paper is to give an overview of the current conditions and the related problems, based on data analysis of CERN database and confronting it with the inventory made at CERN by an external company. After having identified the most frequent problems and repairs to carry out, a planning for intervention is therefore presented optimizing the safety aspects, maintenance costs and comfort for the users. The timescale of this intervention is related to the money that will be available in the coming years.
Alves, P; Pepinster, P; van Baaren, W; CERN. Geneva. ST Division
One "Cool Tool" That's Helping Repair Your DNA | Department of Energy
"Cool Tool" That's Helping Repair Your DNA "Cool Tool" That's Helping Repair Your DNA One "Cool Tool" That's Helping Repair Your DNA April 18, 2011 - 1:20pm Addthis Charles Rousseaux Charles Rousseaux Senior Writer, Office of Science What are the key facts? Berkeley Lab's Advanced Light Source produces x-ray light that shines a billion times bright than the sun. Scientists discovered the motor that drives the actual repair of the DNA repair machine called MRN, which is tethered to the rest of the machine in a fairly flexible fashion. Further insight into MRN and other DNA repair machines may also give scientists new insights into fighting some cancers as well as other diseases such as cystic fibrosis. With the arrival of spring, many families are dusting off their tools to make some home improvements. It's worth remembering that nature also has
Artificial Intelligence and Systems Engineering
/PR URL: http://www.dotomi.com Job Titles: Engineering/IT Apprentice, Client Development/Sales Apprentice, Media Apprentice, Account Management Apprentice, Quality Assurance Apprentice Majors: Business: Business. - BS, Engineering: Contract Major, Engineering: Electrical, Engineering: Industrial, Engineering
Sommerville, Ian
and Chemical Engineering
Biological and Chemical Engineering Building #12;2 Biological and Chemical Engineering Building sta is constructing a new building that will house the Department of Chemical Engineering and the Department and Chemical Engineering Building will provide critically needed space for innovators in multiple disciplines
Prinz, Friedrich B.
Combined-Admission Engineering.
that include relevant engineering experiences, such as FIRST Robotics, Talent Search, or Science/Math Bowl students with an assurance of admission to the Hajim School of Engineering and Applied Sciences in one Science · Electrical and Computer Engineering · Materials Science · Mechanical Engineering · Optics
Portman, Douglas
Life Cycle Engineering Group
... for green manufacturing and construction applications; conduct life cycle engineering assessments for energy efficiency and environmental ...
Argonne TDC: Engineering Technologies
Emergency Response. Engineering. Environmental Research. Fuel Cells. Imaging Technology. Material Science. Nanotechnology. Physical Sciences. Sensor ...
Combustion Turbine Repair Guidelines: Siemens V84.3A (SGT6-4000F)
Development of Laser Weld Repair, Cladding, and Heat Treatment Technology for Alloy 600 RPV Penetrations
EPRI has developed innovative laser weld repair technology for Alloy 600 reactor pressure vessel (RPV) head penetrations in pressure water reactors (PWRs). The repair technology consists of an Nd:YAG laser, fiber optic delivery system, optical assembly (weld head), welding filler metal feed system, and manipulator. The laser system will be used to address the repair of axially oriented cracks, stress relief, and cladding operations.
Conference Proceedings: EPRI-RRAC Fifth International Conference on Welding and Repair Technology for Power Plants
The 2002 Fifth International Conference on Welding and Repair Technology for Power Plants included presentations of case histories, emerging welding technologies, and demonstrated repair techniques and approaches. These proceedings provide technical information discussed during this conference on the repair of steam turbine rotors, disks, blades, piping, steam generators, headers, reactor pressure vessel internals, valves, pumps, combustion turbines, and other components. Sessions include nuclear and fos...
Note: A Graph-Theoretical Approach to Level of Repair Analysis
Aug 29, 2004... of repair and maintenance facilities to minimize overall life-cycle costs. ... Category 2: Applications -- OR and Management Sciences�...
Improving Repair Quality of Turbine Nozzles Using SA650 Braze Alloy
improved repairs for key gas turbine components. Airfoil components of High Pressure and Low. Pressure turbines (HPT and LPT) are subject to wear and�...
Aug 29, 2004 ... Acquisition Management System at www.ams.mod.uk/ams). ... LORA seeks to determine an optimal provision of repair and maintenance.
Engineering Analysis - Nuclear Engineering Division (Argonne)
Analysis Analysis DEPARTMENTS Engineering Analysis Nuclear Systems Analysis Research & Test Reactor Nonproliferation and National Security Detection & Diagnostic Systems Engineering Development & Applications Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Celebrating the 70th Anniversary of Chicago Pile 1 (CP-1) Argonne OutLoud on Nuclear Energy Argonne Energy Showcase 2012 Engineering Analysis Bookmark and Share The Engineering Analysis Department activities focus on development and application of new and innovative analysis methods for both nuclear and non-nuclear systems. The Department is organized into sections and groups for Engineering Simulations, Safety Analysis, Innovative Systems Development, Engineering Assessments, Plant Analysis & Control, Process
Engineering and Structural Mechanics - Nuclear Engineering Division
Engineering and Structural Mechanics Engineering and Structural Mechanics Capabilities Engineering Computation and Design Engineering and Structural Mechanics Overview Areas of Application Examples of Analyses Systems/Component Design, Engineering and Drafting Heat Transfer and Fluid Mechanics Multi-physics Reactor Performance and Safety Simulations Other Capabilities Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Engineering and Structural Mechanics Bookmark and Share Analysis of a Reinforced Concrete Structure using the NEPTUNE Finite Element Code Analysis of a Reinforced Concrete Structure using the NEPTUNE Finite Element Code. Depicted are Cracks in the Concrete Surface due to an Internal Pressurization. Click on image to view larger image.
Engineering Computation and Design - Nuclear Engineering Division...
applied in such diverse areas as vacuum and cryogenic systems, manufacturing engineering, hot cell equipment, and spent fuel processing systems. More... NE Departments involved:...
Engineering Engineering Manufacturing Technologies The Manufacturing, Science & Technology Center engineers, fabricates, assembles and characterizes vacuum systems, components, and processes. Staff can trouble shoot and upgrade existing vacuum systems. Capabilities * Engineering expertise to define, design and fabricate vacuum furnaces, deposition sys- tems and any vacuum environment based process or experimental system * Computer-aided engineering of systems including parametric 3-D solid modeling with ProDesktop (Parametric Design) * Outgassing rate measurements and mass spectroscopy of materials and components * Machining and welding capability for con- structing unique vacuum components for prototype or production applications Resources * Experienced design engineering and fabrication
A preliminary design study of the nuclear gas engine, consisting of a gas-cooled reactor directly coupled to a reciprocating engine, is presented. The principles of operation of the proposed gas engine are outlined and typical variations anre discussed. The nuclear gas engine is compared with other reciprocating engines and air compressors. A comparison between the ideal and actual cycles is made, with particular attention given to pumping, heat, and other losses to be expected. The applications and development of the nuclear gas engine are discussed. (W.D.M.)
Fraas, A.P.
The Phillips Stirling engine
This book is about the Stirling engine and its development from the heavy cast-iron machine of the 19th century to that of today. It is a history of a research effort spanning nearly 50 years, together with an outline of principles, and some technical details and descriptions of the more important engines. Contents include: the hot-air engine; the 20th-century revival; the Stirling cycle; rhombic-drive engines; heating and cooling; pistons and seals; electric generators and heat pumps; exotic heat sources; the engine and the environment; swashplate engines; and the past and the future.
Hargreaves, C.M.
The Entire Engineering Archive
Engineering Archives Engineering Archives Engineering Archives, Since November 1991 Table of Contents: Strongest geometric figure Geometric figures - bridges High school preparation for engineering Engineering fields and mathematics Future of mechanical engineering Absorbing energy in a crash Braking force of automobiles US fast-breeder policy Fusion energy to power Electricity generation Photovoltaic motors Variable speed motor Space plane Building on the moon Why does the Shuttle turn on launch? Gyroscopes Triangulation Magnets in speakers Speaker impedance Permanent magnet manufacture E/M interference FM modulation Pressure rise in pipe expansion Drag coefficient and Reynolds' Number Boundary layers Cavitation Is it more efficient to turn off fluorescent Uninterruptable power supply Electrical current
1999 Gordon Research Conference on Mammalian DNA Repair. Final Progress Report
This Conference will examine DNA repair as the key component in genomic surveillance that is so crucial to the overall integrity and function of mammalian cells. Recent discoveries have catapulted the field of DNA repair into a pivotal position for fundamental investigations into oncology, aging, environmental health, and developmental biology. We hope to highlight the most promising and exciting avenues of research in robust discussions at this conference. This Mammalian DNA Repair Gordon Conference differs from the past conferences in this series, in which the programs were broader in scope, with respect to topics and biological systems covered. A conference sponsored by the Genetics Society in April 1998 emphasized recombinational mechanisms for double-strand break repair and the role of mismatch repair deficiency in colorectal cancer. These topics will therefore receive somewhat less emphasis in the upcoming Conference. In view of the recent mechanistic advances in mammalian DNA repair, an upcoming comprehensive DNA repair meeting next autumn at Hilton Head; and the limited enrollment for Gordon Conferences we have decided to focus session-by-session on particular areas of controversy and/or new developments specifically in mammalian systems. Thus, the principal presentations will draw upon results from other cellular systems only to the extent that they impact our understanding of mammalian DNA repair.
Repair Technology for Degraded Pressure Vessel and Heat Exchanger Shells: RRAC Task 91
The ability to repair pressure vessels and heat exchangers offers utilities significant cost savings compared to replacing these components. This is especially the case if outage time and loss of production are factored into the cost of replacement. This guide provides a review of various current and proposed repair methods that can be used for pressure vessel and heat exchanger applications.
Manual of Bearing Failures and Repair in Power Plant Rotating Equipment
Bearing failures are a leading cause of unavailability for power plant rotating machinery, often resulting in prolonged forced outages and costly repairs. This manual, which assists utilities in identifying bearing failure modes and selecting remedial actions to prevent future failures, provides guidelines for repair techniques.
Change-point detection in failure intensity: A case study with repairable artillery systems
Repairable systems can experience unexpected environmental changes over long operational periods. Such changes affect the incidence of failures, causing different system failure patterns before and after the changes. In this article, we propose an informational ... Keywords: Change-point, Homogeneous Poisson process, Modified information criterion, Repairable system, Schwarz information criterion, Statistical trend test
Suk Joo Bae; Byeong Min Mun; Kyung Yong Kim
A Systematic Stochastic Petri Net Based Methodology for Transformer Fault Diagnosis and Repair Actions
Transformer fault diagnosis and repair is a complex task that includes many possible types of faults and demands special trained personnel. Moreover, the minimization of the time needed for transformer fault diagnosis and repair is an important task ... Keywords: power system reliability, stochastic petri nets, transformer fault diagnosis
P. S. Georgilakis; J. A. Katsigiannis; K. P. Valavanis; A. T. Souflaris
State-of-the-Art Weld Repair Technology for Rotating Components
Deregulation of the power industry, increased competition, enhanced environmental regulations, and aging or degraded equipment continue to place greater economic pressures on utilities. Weld repair of rotors and discs offers a viable means of extending the life of in-service rotors and discs. This report provides comprehensive repair guidelines for utilities.
College of Engineering CME Chemical Engineering
: COM 199, CME 455, CME 550 and engineering standing. CME 462 PROCESS CONTROL. (3) Basic theory. Technologies covered include coal, natural gas, nuclear, biomass, wind, solar and advanced technologies. Prereq: Engineering standing or consent of instructor. (Same as EGR 542.) CME 550 CHEMICAL REACTOR DESIGN. (3
Kim, Mi-Ok
A generalized linear-quadratic model incorporating reciprocal time pattern of radiation damage repair
Purpose: It has been conventionally assumed that the repair rate for sublethal damage (SLD) remains constant during the entire radiation course. However, increasing evidence from animal studies suggest that this may not the case. Rather, it appears that the repair rate for radiation-induced SLD slows down with increasing time. Such a slowdown in repair would suggest that the exponential repair pattern would not necessarily accurately predict repair process. As a result, the purpose of this study was to investigate a new generalized linear-quadratic (LQ) model incorporating a repair pattern with reciprocal time. The new formulas were tested with published experimental data. Methods: The LQ model has been widely used in radiation therapy, and the parameter G in the surviving fraction represents the repair process of sublethal damage with T{sub r} as the repair half-time. When a reciprocal pattern of repair process was adopted, a closed form of G was derived analytically for arbitrary radiation schemes. The published animal data adopted to test the reciprocal formulas. Results: A generalized LQ model to describe the repair process in a reciprocal pattern was obtained. Subsequently, formulas for special cases were derived from this general form. The reciprocal model showed a better fit to the animal data than the exponential model, particularly for the ED50 data (reduced {chi}{sup 2}{sub min} of 2.0 vs 4.3, p = 0.11 vs 0.006), with the following gLQ parameters: {alpha}/{beta} = 2.6-4.8 Gy, T{sub r} = 3.2-3.9 h for rat feet skin, and {alpha}/{beta} = 0.9 Gy, T{sub r} = 1.1 h for rat spinal cord. Conclusions: These results of repair process following a reciprocal time suggest that the generalized LQ model incorporating the reciprocal time of sublethal damage repair shows a better fit than the exponential repair model. These formulas can be used to analyze the experimental and clinical data, where a slowing-down repair process appears during the course of radiation therapy.
Huang, Zhibin; Mayr, Nina A.; Lo, Simon S.; Wang, Jian Z.; Jia Guang; Yuh, William T. C.; Johnke, Roberta [Department of Radiation Oncology, East Carolina University, Greenville, North Carolina 27834 (United States); Department of Radiation Oncology, Ohio State University, Columbus, Ohio 43210 (United States); Department of Radiation Oncology, University Hospitals Case Medical Center, Case Western Reserve University, Cleveland, Ohio 44106 (United States); Department of Radiation Oncology, Ohio State University, Columbus, Ohio 43210 (United States); Department of Radiology, Ohio State University, Columbus, Ohio 43210 (United States); Department of Radiation Oncology, East Carolina University, Greenville, North Carolina, 27834 (United States)
Engine lubrication oil aeration
The lubrication system of an internal combustion engine serves many purposes. It lubricates moving parts, cools the engine, removes impurities, supports loads, and minimizes friction. The entrapment of air in the lubricating ...
Baran, Bridget A. (Bridget Anne)
Electrical engineering Electricity
generation Transmission Distribution · Electrical generators · Electric motors · High voltage engineering associated with the systems Electrical engineering · Electric power generation Transmission Distribution The electricity transported to load locations from a power station transmission subsystem The transmission system
�?nay, Devrim
Transportation Engineering Graduate Programs Department of Civil & Environmental Engineering
Transportation Engineering Graduate Programs Department of Civil & Environmental Engineering Maseeh College of Engineering & Computer Science STUDY TRANSPORTATION ENGINEERING AT Portland, Oregon is famous for its multimodal transportation system. Why not come to Portland State University and study
Bertini, Robert L.
www.mdpi.com/journal/ijms Chromatin Dynamics during Nucleotide Excision Repair: Histones on the Move
Abstract: It has been a long-standing question how DNA damage repair proceeds in a nuclear environment where DNA is packaged into chromatin. Several decades of analysis combining in vitro and in vivo studies in various model organisms ranging from yeast to human have markedly increased our understanding of the mechanisms underlying chromatin disorganization upon damage detection and re-assembly after repair. Here, we review the methods that have been developed over the years to delineate chromatin alterations in response to DNA damage by focusing on the well-characterized Nucleotide Excision Repair (NER) pathway. We also highlight how these methods have provided key mechanistic insight into histone dynamics coupled to repair in mammals, raising new issues about the maintenance of chromatin integrity. In particular, we discuss how NER factors and central players in chromatin dynamics such as histone modifiers, nucleosome remodeling factors, and histone chaperones function to mobilize histones during repair.
Salom� Adam; Sophie E. Polo
Reducing Diesel Engine Emissions
Reducing Reducing Diesel Engine Emissions 2 0 1 0 Green TransporTaTion TechnoloGies Compared to traditional gasoline engines, diesel engines require less maintenance, generate energy more efficiently, and produce less carbon dioxide emissions. But when uncontrolled, diesel engines churn out harmful emissions like particu- late matter (PM) and nitrogen oxides (NO x ). Researchers at Argonne National Laboratory are currently working to develop
Chemical Engineering & Processing Thermodynamics ...
... Engineering & Processing Thermodynamics Information at ... Phase Equilibrium Data (01/30 ... Connecting Thermodynamic and Dynamic Properties of ...
NSLS Operations & Engineering
Operations & Engineering Electrical Equipment Controls & Diagnostics Computer Systems Power Systems Mechanical Design Mechanical Tech Utilities Vacuum Work Planning & Controls...
Systems Engineering Group
... advances, and deploys measurement science to address application of engineering information systems to complex cyber-physical systems. ...
Journal of Biological Engineering
5Department of Electrical Engineering, University of California, Berkeley, CA 94720, USA ... Institute of Science and Technology, Ulsan, Korea
Engineering Laboratory Homepage
... and InfrastructureDisaster-Resilient Buildings, Infrastructure, and ... of the Manufacturing Engineering Laboratory. ... Net-Zero Energy Residential Test ...
Topic: Wind Engineering
Topic: Wind Engineering. Forty-Fourth Meeting of the UJNR Panel on Wind and Seismic Effects. NIST researchers collected ...
Energy Technology Engineering Center
Technology Engineering Center Technology Engineering Center 41 00 Guardian Street, Suite # 160 Simi Valley, CA 93063 Memorandum for: Gregory H. Woods General Council January 30, 2013 FROM: John Jones EL\= Federal Proje� irector Energy Technology Engineering Center (ETEC) Project Office SUBJECT: Annual National Environmental Policy Act {NEPA) Planning Summary Attached is the 2013 Annual NEPA Planning Summary for the ETEC Project Office.
UML for systems engineering
The paper provides an introduction to the employment of Unified Modeling Language (UML) in systems engineering. The standard being developed for this purpose is the Systems Modeling Language (SysML) specification. This paper, while not dealing with SysML ... Keywords: DoDAF, Software engineering, SysML, Systems engineering, UML
Brian Willard
ELECTRICAL & COMPUTER ENGINEERING SEMINAR "Considerations for Curriculum Planning and Revitalization in Engineering" by Prof. Michael A. de Miranda School of Education and Department of Electrical and Computer Engineering Colorado State University Monday, Feb. 20, 2012, 11:00 a.m. Location: LSC 210 Abstract
Electrical, Computer, and Energy Engineering University of Colorado--Boulder Monday, April 2, 2012, 11:00 a an Associate Professor with the Department of Electrical Engineering, University of Colorado, Boulder. He hadELECTRICAL & COMPUTER ENGINEERING SEMINAR "A Random Walk on Image Patches" by Prof. Francois Meyer
users to enter more specific and complex queries. Most search engines cover only a small portion the proximity of the query terms within a page. As another example, a search engine may keep track of the number is also mostly true as the average number of terms in a search engine query is slightly over two. When
Meng, Weiyi
experiences, such as FIRST Robotics, Talent Search, or Science/Math Bowl Admission If you're selected of admission to the Hajim School of Engineering and Applied Sciences in one of nine master's programs: · Alternative Energy · Biomedical Engineering · Chemical Engineering · Computer Science · Electrical
Search, or Science/Math Bowl Admission If you're selected for a GEAR interview, you'll be notified of admission to the Hajim School of Engineering and Applied Sciences in one of nine master's programs: · Alternative Energy · Biomedical Engineering · Chemical Engineering · Computer Science · Electrical
of Science in Biomedical Engineering* BSBME Biomedical Eng BME --ineering CHEMICAL & BIOLOGICA ENGINEERING L Bachelor of Science in Chemical Engineering* BSCHE Chemical Engin CHE --eering CIVIL & ENVIRONMENTA ENGINEERING Bachelor of Science in Civil Engineering* BSCE Civil Engineerin CE --g L Bachelor of Science
Tufts University
PhD Chemical Engineering MS Chemical Engineering
1 PhD Chemical Engineering MS Chemical Engineering Bylaws Gene and Linda Voiland School of ChemicalD Chemical Engineering, MS Chemical Engineering B. Discipline: Edgar, et al.1 provide a succinct description of chemical engineering: "chemical engineers seek to understand, manipulate, and control the molecular basis
Collins, Gary S.
Chemical Engineering The George R. Brown School of Engineering
110 Chemical Engineering The George R. Brown School of Engineering Chair Kyriacos Zygourakis of study leading to the nonthesis Master of Chemical Engineering (M.Ch.E.) degree. A joint M, and biomedical engineering. #12;Chemical Engineering 111 Degree Requirements for B.S. in Chemical Engineering
Richards-Kortum, Rebecca
117 Chemical Engineering The George R. Brown School of Engineering Chair Kyriacos Zygourakis,studentsmayapplyforafifthyearofstudyleadingtothenonthesis Master of Chemical Engineering (M.Ch.E.) degree. A joint M.B.A./M.Ch.E. degree is also available, and biomedical engineering. #12;Chemical Engineering 119118 DEPARTMENTS / Chemical Engineering For CENG 301 Math
120 Chemical Engineering The George R. Brown School of Engineering Chair Kyriacos Zygourakis,studentsmayapplyforafifthyearofstudyleadingtothenonthesis Master of Chemical Engineering (M.Ch.E.) degree. A joint M.B.A./M.Ch.E. degree is also available, and biomedical engineering. #12;Chemical Engineering 121 Degree Requirements for B.S. in Chemical Engineering
ARM - Engineering Work Request & Engineering Work Order Guidelines
Work Request & Engineering Work Request & Engineering Work Order Guidelines Page Contents: Introduction Discussion of the ARM Climate Research Facility Engineering Process: The Engineering Change Request (ECR) and the Engineering Change Order (ECO) Operations and Engineering Task Consulting: The Engineering Work Request (EWR) and the Engineering Work Order (EWO) Relationship of the ECR/ECO and EWR/EWO to the Engineering Task Tracking Tool Relationship of the ECR/ECO and EWR/EWO to the Existing Configuration Control Process in the ARM Climate Research Facility(PIF/CAR, PRR, ORR, and BCR) Glossary Frequently Asked Questions (PDF, 173K) Engineering Work Request & Engineering Work Order Guidelines Process Guidelines for the Engineering Change Request/Engineering Change Order and Engineering Work Request/Engineering Work Order
Wind Engineering Information at NIST
NIST Home > Wind Engineering Information at NIST. Wind Engineering Information at NIST. (the links below are a compilation ...
Health physics support for thermal shield repair at Connecticut Yankee
This article describes the radiation and safety controls used by Connecticut Yankee Atomic Power Company to support underwater repair work on the Haddam Neck Plant's core barrel thermal shield. The work was conducted by divers in the reactor cavity using remote tools and protected by a specially-constructed physical barrier that restricted their movements to a carefully defined and thoroughly surveyed area. A unique dosimetry test rig was used to determine the dose rate profiles within the work areas, and all underwater survey equipment was qualified against personnel dosimetric devices. Underwater operations were monitored and controlled by remote means (video surveillance and dosimetry telemetry), and health physics technicians were rotated through job coverage to avoid complacency and maximize training opportunities. A single, hot particle event occurred during one dive, but this was identified almost immediately and controlled to prevent excessive exposure to the diver.
Nevelos, W.F.; Gates, W.J. (Connecticut Yankee Atomic Power Co., East Hampton, CT (United States))
Interfacial instability and DNA fork reversal by repair proteins
A repair protein like RecG moves the stalled replication fork in the direction from the zipped to the unzipped state of DNA. It is proposed here that a softening of the zipped-unzipped interface at the fork results in the front propagating towards the unzipped side. In this scenario, an ordinary helicase destabilizes the zipped state locally near the interface and the fork propagates towards the zipped side. The softening of the interface can be produced by the aromatic interaction, predicted from crystal structure, between RecG and the nascent broken base pairs at the Y-fork. A numerical analysis of the model also reveals the possibility of a stop and go type motion.
Somendra M. Bhattacharjee
Removal of Dioxin Contamination for Gas Turbine Generator Set Repair
Decontamination projects are typically undertaken in the interest of reducing disposal costs. This goal can be achieved because decontamination concentrates the contaminant into a smaller volume or changes its form so that a lower cost disposal technology becomes available. Less frequently, decontamination adds value back to the fouled structure or contaminated piece of equipment. This removal of dioxins from a gas turbine generator set is one of the latter cases. A multi-million dollar piece of equipment could have been destined for the scrap pile. Instead, an innovative, non-destructive decontamination technology, developed under EPA and DOE demonstration programs has was employed so that the set could repaired and put back into service. The TechXtractchemical decontamination technology reduced surface dioxin / furan concentrations from as high as 24,000 ng / m2 to less than 25 ng / m2 and below detection limits.
Fay, W. S.; Borah, R.E.
Optimized hydrogen piston engines
Hydrogen piston engines can be simultaneously optimized for improved thermal efficiency and for extremely low emissions. Using these engines in constant-speed, constant-load systems such as series hybrid-electric automobiles or home cogeneration systems can result in significantly improved energy efficiency. For the same electrical energy produced, the emissions from such engines can be comparable to those from natural gas-fired steam power plants. These hydrogen-fueled high-efficiency, low-emission (HELE) engines are a mechanical equivalent of hydrogen fuel cells. HELE engines could facilitate the transition to a hydrogen fuel cell economy using near-term technology.
Smith, J.R.
NREL: Photovoltaics Research - Engineering
Photovoltaic Engineering Photovoltaic Engineering Photovoltaic (PV) Engineering at NREL supports commercial and emerging PV technology development. Our support covers the following three areas: Engineering Testing and Evaluation. We provide engineering testing and evaluation of PV products developed by companies during work sponsored by the U.S. Department of Energy (DOE). We determine if products meet performance criteria established by DOE for a company's contractual obligations. Standards Development. We support the development of national and international standards. Current work includes investigating methods of preconditioning cadmium telluride and copper indium gallium diselenide PV modules so that when they are tested for reporting conditions, the results are correlated with subsequent field measurements.
The Department of Mechanical Engineering --Engineering Mechanics
, Missile, Research, Development and Engineering Directorate's Propulsion Iaborato'. Ills primaly areas of research are in numerical combustion, and the thermal and mechanical aging ofnitrate esterpropellants decomposition and combustion. Stabilizers are added to the propellants to neutralize the decomposition products
Endres. William J.
Fabrication Flaw Density and Distribution In Repairs to Reactor Pressure Vessel and Piping Welds
The Pacific Northwest National Laboratory is developing a generalized fabrication flaw distribution for the population of nuclear reactor pressure vessels and for piping welds in U.S. operating reactors. The purpose of the generalized flaw distribution is to predict component-specific flaw densities. The estimates of fabrication flaws are intended for use in fracture mechanics structural integrity assessments. Structural integrity assessments, such as estimating the frequency of loss-of-coolant accidents, are performed by computer codes that require, as input, accurate estimates of flaw densities. Welds from four different reactor pressure vessels and a collection of archived pipes have been studied to develop empirical estimates of fabrication flaw densities. This report describes the fabrication flaw distribution and characterization in the repair weld metal of vessels and piping. This work indicates that large flaws occur in these repairs. These results show that repair flaws are complex in composition and sometimes include cracks on the ends of the repair cavities. Parametric analysis using an exponential fit is performed on the data. The relevance of construction records is established for describing fabrication processes and product forms. An analysis of these records shows there was a significant change in repair frequency over the years when these components were fabricated. A description of repair flaw morphology is provided with a discussion of fracture mechanics significance. Fabrication flaws in repairs are characterized using optimized-access, high-sensitivity nondestructive ultrasonic testing. Flaw characterizations are then validated by other nondestructive evaluation techniques and complemented by destructive testing.
GJ Schuster, FA Simonen, SR Doctor
Effect of multiple repairs in girth welds of pipelines on the mechanical properties
This work presents the results of multiple weld repairs in the same area in seamless API X-52 microalloyed steel pipe. Four conditions of shielded metal arc welding repairs and one as-welded specimen of the girth weld were characterized to determine changes in the microstructure, grain size in the heat affected zone, and to evaluate their effect on the mechanical properties of the weld joints. The mechanical properties by means of tension tests, Charpy-V impact resistance and Vickers hardness of the welds were analyzed. The results indicate that significant changes are not generated in the microstructural constituents of the heat affected zone. Grain growth in the heat affected zone at the specimen mid-thickness with the number of repairs was observed. Tensile strength of the weld joints meets the requirement of the API 1104 standard even after the fourth weld repair. Significant reduction in Charpy-V impact resistance with the number of weld repairs was found when the notch location was in the intersection of the fusion line with the specimen mid-thickness. A significant increase in the Vickers hardness of the heat affected zone occurred after the first repair and a gradual decrease in the Vickers hardness occurred as the number of repairs increases.
Vega, O.E.; Hallen, J.M. [Departamento de Ingenieria Metalurgica, ESIQIE-IPN, Laboratorios Pesados de Metalurgia, UPALM, Zacatenco, C.P. 07738, Mexico D.F. (Mexico); Villagomez, A. [Construcciones Maritimas Mexicanas, CMM-PROTEXA, Av. Periferica s/n, Fracc. Lomas de Holche, C.P. 24120, Cd. del Carmen, Campeche (Mexico); Contreras, A. [Instituto Mexicano del Petroleo, Investigacion en Ductos, Corrosion y Materiales, Eje Central Lazaro Cardenas Norte 152 Col. San Bartolo Atepehuacan, C.P. 07730, Mexico D.F. (Mexico)], E-mail: email@example.com
Engineering Fundamentals - Civil Engineering Topics, Version 2.0
The Civil Engineering Topics, v2.0 module of Engineering Fundamentals provides information about basic civil engineering terms and concepts in order to identify civil engineering-related design, materials, and safety considerations, as they relate to nuclear power plant employees. It is intended for use as orientation training of new engineering support personnel.Benefits & ValueEngineering Fundamental � Civil Engineering Topics will allow for the ...
Staged combustion with piston engine and turbine engine supercharger
A combustion engine method and system provides increased fuel efficiency and reduces polluting exhaust emissions by burning fuel in a two-stage combustion system. Fuel is combusted in a piston engine in a first stage producing piston engine exhaust gases. Fuel contained in the piston engine exhaust gases is combusted in a second stage turbine engine. Turbine engine exhaust gases are used to supercharge the piston engine.
Fischer, Larry E. (Los Gatos, CA); Anderson, Brian L. (Lodi, CA); O' Brien, Kevin C. (San Ramon, CA)
Microsoft Word - SPR Emergency Pipeline Repair, 2013-2017 NEPA.docx
Emergency Pipeline and Piping Repair, 2013-2017 Emergency Pipeline and Piping Repair, 2013-2017 Description: Subcontractor shall shall provide all labor, materials, equipment, supervision, transportation and services required to perform emergency repairs on the SPR system site piping (including underground fire protection systems and offsite pipelines). Subcontractor shall mobilize equipment to perform excavation, backfill, hydrostatic testing, welding and cutting, blasting, coating and painting of large and small diameter piping systems on the SPR facilities and offsite pipelines. Subcontractor shall also assist in emergency exercises by assemblying temporary piping spools and positioning pump skids and temporary supports. This NEPA document covers the period from 2013-2017.
Engine fuels from biomass
Methods discussed for the conversion of biomass to engine fuels include the production of producer gas, anaerobic fermentation to give biogas, fermentation of sugars and starches to give EtOH, and the production of synthesis gas for conversion to MeOH or hydrocarbons. Also discussed are the suitability of these fuels for particular engines, biomass availability, and the economics of biomass-derived engine fuels.
Parker, H.W.
Engineering Salary Trends
Salaries of Engineers in Education 1994 reports salaries of full-time faculty at ... to earn higher salaries at medium-sized companies (500-4,999 employees),�...
Search engine credibility.
??While search engines have become increasingly popular over the past years, little research is concerned with how they attend to credibility. Through interviews with six� (more)
Floden, Asbj�rn
Engineering Science at NERSC
Engineering Science Bell1.png Researchers in this area develop and apply a variety of advanced computational methodologies for solving large-scale complex fluid flow problems with...
NASA and Green Engineering
... First course offered in January 2011; 5 offerings so far. 12. Sponsors: Office of the Chief Engineer and Environmental Management Div. ...
Tools for Engineered Surfaces
... Heat Exchangers, Steam Condensers. 2636.3, 216, 21,000. ... Turbines and Turbine Generator Sets, 67, 6, 4, 2. IC Engines, 263, 19, 8, 4. ...
Documents: Engineering Studies
of Depleted UF6 99 KB details HTML Icon Preconceptual Design Studies and Cost Data of Depleted Uranium Hexafluoride Conversion Plants 4 KB details Engineering Analysis Report...
Bioinspired Materials Engineering
Bioinspired Crystal Growth by Organic/Inorganic Crystal Engineering � Bioinspired Materials Design from Renewable Resources � Biological Synthesis of TiNi�...
Diesel Engine Alternatives
There are basically three different modes of combustion possible for use in reciprocating engines. These include, diffusion burning, as occurs in current diesel engines, flame propagation combustion such as used in conventional SI engines, and homogeneous combustion such as is used in the SwRI HCCI engine. Diesel engines currently offer significant fuel consumption benefits relative to other powerplants for on and off road applications; however, costs and efficiency may become problems as the emissions standards become even more stringent. This presentation presents a discussion of the potentials of HCCI and flame propagation engines as alternatives to the diesel engines. It is suggested that as the emissions standards become more and more stringent, the advantages of the diesel may disappear. The potential for HCCI is limited by the availability of the appropriate fuel. The potential of flame propagation engines is limited by several factors including knock, EGR tolerance, high BMEP operation, and throttling. These limitations are discussed in the context of potential for improvement of the efficiency of the flame propagation engine.
Ryan, T
Improving Search Engine Reliability
Search engines on the Internet are used daily to access and find information. While these services are providing an easy way to find information globally
Jyoti Pruthi; Ela Kumar
Biosystems Engineering, 1 edition
Maximize productivity while minimizing environmental impactDevelop sustainable products, energy sources, and processes using the concepts and methods contained in this interdisciplinary resource. Biosystems Engineering discusses ...
Ahindra Nag
Stirling Engine Cycle Efficiency.
??ABSTRACT This study strives to provide a clear explanation of the Stirling engine and its efficiency using new automation technology and the Lab View software.� (more)
Naddaf, Nasrollah
Internal combustion engine
An improvement to an internal combustion engine is disclosed that has a fuel system for feeding a fuel-air mixture to the combustion chambers and an electrical generation system, such as an alternator. An electrolytic cell is attached adjacent to the engine to generate hydrogen and oxygen upon the application of a voltage between the cathode and anode of the electrolytic cell. The gas feed connects the electrolytic cell to the engine fuel system for feeding the hydrogen and oxygen to the engine combustion chambers. Improvements include placing the electrolytic cell under a predetermined pressure to prevent the electrolyte from boiling off, a cooling system for the electrolytic cell and safety features.
Valdespino, J.M.
LNG � Engine Delivery
This is a method of improved delivery of liquid natural gas (LNG) within an engine delivery system. The LNG gas is first be pumped into the insulated ...
Stirling engine heating system
A hot gas engine is described wherein a working gas flows back and forth in a closed path between a relatively cooler compression cylinder side of the engine and a relatively hotter expansion cylinder side of the engine and the path contains means including a heat source and a heat sink acting upon the gas in cooperation with the compression and expansion cylinders to cause the gas to execute a thermodynamic cycle wherein useful mechanical output power is developed by the engine, the improvement in the heat source which comprises a plurality of individual tubes each forming a portion of the closed path for the working gas.
Johansson, L.N.; Houtman, W.H.; Percival, W.H.
NREL: Systems Engineering - Workshops
Workshops The Wind Energy Systems Engineering Workshop is a biennial workshop that invites speakers from academia, industry, and international research laboratories to discuss...
Plug repairs of marine glass fiber / vinyl ester laminates subjected to uniaxial tension
Glass fiber/vinyl ester composite laminates are currently being used and proposed for the hulls, bulkheads, and superstructures of large ships. This thesis examines the effectiveness of the repair of such laminates using ...
Michelis, Alexandros
Maintenance and repair: a simulation model for field service with condition-based maintenance
In this paper, we consider field service in which service providers are responsible for maintaining equipment performance. To do so, preventive maintenance work is usually required in addition to repairs. Field service managers are often faced with the ...
Yiqing Lin; Arthur Hsu; Ravi Rajamani
Tiny Terminators: New Micro-Robots Assemble, Repair Themselves and Are Surprisingly Strong
Energy.gov (U.S. Department of Energy (DOE))
Tiny robots that can assemble and repair themselves? Watch a video of Argonne National Laboratory's micro-robots that easily perform tasks that can challenge other robots, including moving objects that are larger than themselves.
In-Situ Repairs of Oil Industry Pipelines, Tanks and Vessels by ...
Abstract Scope, Metal arc welding under oil (MAW-UO) is a new, revolutionary process to repair a pipeline, tank or vessel by welding in case of flaws and�...
Review of Maintenance and Repair Times for Components in Technological Facilities
This report is a compilation of some unique component repair time data and it also presents citations of more extensive reports where lists of repair times can be found. This collection of information should support analysts who seek to quantify maintainability and availability of high technology and nuclear energy production systems. While there are newer sources of repair time information, most, if not all, of the newer sources are proprietary and cannot be shared. This report offers data that, while older, is openly accessible and can serve as reasonable estimates of repair times, at least for initial studies. Some times were found for maintenance times in radiation environments, and some guidance for multiplicative factors to use to account for work in contamination areas.
L. C. Cadwallader
Low Dose Radiation Induced DNA Damage Signaling and Repair Responses in
Induced DNA Damage Signaling and Repair Responses in Induced DNA Damage Signaling and Repair Responses in Human 3-Dimensional Skin Model System Yanrong Su, Jarah Meador and Adayabalam S. Balajee Center for Radiological Research, College of Physicians and Surgeons, Columbia University, 630 West, 168th Street, New York, NY 10032. Exposure to ionizing radiation (IR) inflicts a wide variety of lesions in the genomic DNA. Among them, DNA double strand break (DSB) is considered to be the critical lesion for most of the deleterious radiation effects including carcinogenesis. Much of our knowledge on induction and repair kinetics of DSB has come from studies in two dimensional cell culture systems. However, the damage signaling and repair responses to DSB in tissue microenvironment are largely unknown. Knowledge of tissue responses to
ASSESSMENT OF INDIVIDUAL VARIATION IN DNA DOUBLE-STRAND ASSESSMENT OF INDIVIDUAL VARIATION IN DNA DOUBLE-STRAND BREAK REPAIR CAPACITY IN HUMAN DIPLOID FIBROBLASTS Paul F. Wilson, John M. Hinz, Peter B. Nham, Salustra S. Urbin, Cynthia B. Thomas, Irene M. Jones, and Larry H. Thompson Biosciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA The induction of bi-stranded clustered DNA damage (BCD), which includes direct DNA double-strand breaks (DSBs), is a hallmark of ionizing radiation (IR) exposure. Incorrectly repaired DSBs can cause chromosomal rearrangements and an increased risk of genomic instability and cancer. Because there is polymorphic variation in DNA repair genes and much of this variation is predicted to have a functional impact, healthy people likely vary in their capacity to repair DSBs and other BCD. This project
A Protein that Repairs Damage to Cancer Cells | Advanced Photon Source
An X-ray Vortex on the Horizon? An X-ray Vortex on the Horizon? How Two Drops Become One Scientists Discover How Nanocluster Contaminants Increase Risk of Spreading Mobile RNA is Poised and Ready Glass Does a Double-Take Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed A Protein that Repairs Damage to Cancer Cells MAY 5, 2008 Bookmark and Share The ABH2-DNA complex. A team of University of Chicago scientists has shown how two proteins locate and repair damaged genetic material inside cells. Because one of the proteins detects and repairs DNA damage that may result from a certain type of cancer therapy, the researchers raised the possibility of designing a molecule that could interfere with the repair process, making cancer
Comparison of American Petroleum Institute 579/American Society of Mechanical Engineers FFS1 with EPRI Life Assessment Guidelines
The American Society of Mechanical Engineers (ASME) governs the design and construction of power boilers and piping systems in the United States and many other countries. The ASME rules generally cover only the design and construction of these components, whereas rules for maintenance, repair, and life assessment are not addressed. Recently, ASME has been developing guidelines for post-construction activities, including damage assessment and life prediction. The Electric Power Research Institute (EPRI) h...
The objective of this program was to design and formulate organic polymer-based material systems suitable for repairing and restoring the overlay panels of insulating lightweight polymer concrete (ILPC) from the concrete floor and slope wall of a dike at KeySpan liquefied natural gas (LNG) facility in Greenpoint, Brooklyn, NY, just over sixteen years ago. It also included undertaking a small-scale field demonstration to ensure that the commercial repairing technologies were applicable to the designed and formulated materials.
Welding and Repair Technology Center: Essential and Emergency Service Water System Issues
Because of the numerous ASME Code and Regulatory (Nuclear Regulatory Commission) documents addressing operability and repair of through-wall leakage in class 2 and 3 systems, inconsistencies exist in their interpretation and application. This report is intended to summarize and clarify the current Code and Regulatory requirements and provisions applicable to operability and repair of essential and emergency service water systems with leakage through the pressure boundary.
Technical Repair Guidelines for the Limitorque Model SMB-00 Valve Actuator
This technical repair guideline (TRG) is the second in a series of documents devoted to comprehensive maintenance and repair of the motor-operated Limitorque SMB-00 valve actuator. The Limitorque SMB-00 valve actuator is mounted on a nonrotating rising stem valve and is applicable to other types of valves and installation arrangements. This report was written with the latest available information, however, changes to the actuator's design, parts availability, etc. may supersede this document but will not...
Topical Report: Application of the Excavate and Weld Repair Process for Repair and Mitigation of Alloy 182 and 82 in PWRs
Weld overlay is a mature technology for the repair of PWR nozzle dissimilar metal butt welds that are susceptible to primary water stress corrosion cracking (PWSCC). While weld-overlay technology continues to serve the industry well, a viable alternative is desirable for large-bore nozzle welds (>24 inches outside diameter) to minimize the time required to perform the repair and to serve in cases in which significant physical interferences near the Alloy 82/182 dissimilar metal weld would make it difficu...
WEB RESOURCE: Nuclear Engineering Materials - TMS
Feb 12, 2007 ... "Nuclear Engineering Materials." Engineering Physics Department, College of Engineering. University of Wisconsin-Madison, Fall 2006.
Repair of UV damaged DNA, genes and proteins of yeast and human
Our objectives are to determine the molecular mechanism of the incision step of excision repair of ultraviolet (UV) light damaged DNA in eukaryotic organisms, using the yeast Saccharomyces cerevisiae as a model system, as well as studying the human homologs of yeast excision repair and postreplication repair proteins. In addition to its single-stranded DNA-dependent A TPase and DNA helicase activities, we have found that RAD3 protein also possesses DNA-RNA helicase activity, and that like RAD3, the Schizosaccharomyces pombe RAD3 homolog, rhp3{sup +}, is an essential gene. We have overexpressed the human RAD3 homolog, ERCC2, in yeast to facilitate its purification. The RAD10 protein was purified to homogeneity and shown to bind DNA. ERCC3y, the yeast homolog of the human ERCC-3/XP-B gene, has been sequenced and shown to be essential for viability. The Drosophila and human homologs of RAD6, required for postreplication repair and UV induced mutagenesis, were shown to complement the rad6 {Delta} mutation of yeast. Since defective DNA repair and enhanced neoplasia characterize several human genetic diseases, and repair proteins are highly conserved between yeast and man, a thorough understanding of the molecular mechanisms of DNA repir in yeast should provide a better understanding of the causes of carcinogenesis.
Prakash, L.
An introductory software engineering course for software engineering program
One important issue in undergraduate software engineering curriculum is how to help students establish the concept of software engineering at the beginning of software engineering undergraduate program and to provide a reasonable basis of knowledge and ...
Dong Shao; Bin Luo; Eryu Ding; Qin Liu
COLLEGE OF ENGINEERING Environment
.D. degrees in electrical engineering from Colorado State, has made pioneering contributions in the area at a semiconductor company as a designer prior to starting her Ph.D. program in electrical engineering at Colorado solutions they apply to, Colorado State continues to develop itself as the "Green University," which gives
Mining engineering analysis
An attempt is made to fill the gap between theory and application in mining engineering. The book is based on SME Mining Engineering Handbook and the Coal Mining Technology - Theory and Practice. Each chapter deals with the theory and then presents problems of applications and the solutions to them. Topics considered include underground mining, surface mining, geophysics, mining equipment, and rock mechanics.
Bise, C.J.
SAFETY HANDBOOK For CHEMICAL AND PAPER ENGINEERING 2010-2011 #12;Page 1 Safety Guidelines Department of Chemical and Paper Engineering Miami University - Oxford, Ohio 45056 The following safety and Laboratory Coordinator Responsibilities III. Emergency Procedures IV. Chemical Storage V. Routine
Stirling engine piston ring
A piston ring design for a Stirling engine wherein the contact pressure between the piston and the cylinder is maintained at a uniform level, independent of engine conditions through a balancing of the pressure exerted upon the ring's surface and thereby allowing the contact pressure on the ring to be predetermined through the use of a preloaded expander ring.
Howarth, Roy B. (Clifton Park, NY)
Hydrogen Fuel Cell Engines
#12;#12;Hydrogen Fuel Cell Engines MODULE 11:GLOSSARY AND CONVERSIONS CONTENTS 11.1 GLOSSARY Cell Engines MODULE 11:GLOSSARY AND CONVERSIONS OBJECTIVES This module is for reference only. Hydrogen MODULE 11: GLOSSARY AND CONVERSIONS PAGE 11-1 11.1 Glossary This glossary covers words, phrases
Gas turbine engines
A core engine or gas generator is described for use in a range of gas turbine engines. A multi-stage compressor and a single stage supersonic turbine are mounted on a single shaft. The compressor includes a number of stages of variable angle and the gas generator has an annular combustion chamber.
MacDonald, A.G.
Free piston stirling engines
This book presents a basic introduction to free piston Stirling engine technology through a review of specialized background material. It also includes information based on actual construction and operation experience with these machines, as well as theoretical and analytical insights into free piston Stirling engine technology.
Walker, C.
Computer Science & Computer Engineering
CSCE Computer Science & Computer Engineering #12;Computer scientists and computer engineers design and implement e cient software and hardware solutions to computer-solvable problems. They are involved, virtual reality and robotics. Within the Computer Science department, we o er four exciting majors from
Metabolic Engineering VII Conference
The aims of this Metabolic Engineering conference are to provide a forum for academic and industrial researchers in the field; to bring together the different scientific disciplines that contribute to the design, analysis and optimization of metabolic pathways; and to explore the role of Metabolic Engineering in the areas of health and sustainability. Presentations, both written and oral, panel discussions, and workshops will focus on both applications and techniques used for pathway engineering. Various applications including bioenergy, industrial chemicals and materials, drug targets, health, agriculture, and nutrition will be discussed. Workshops focused on technology development for mathematical and experimental techniques important for metabolic engineering applications will be held for more in depth discussion. This 2008 meeting will celebrate our conference tradition of high quality and relevance to both industrial and academic participants, with topics ranging from the frontiers of fundamental science to the practical aspects of metabolic engineering.
Kevin Korpics
Thermoacoustic engines and refrigerators
This report is a transcript of a practice lecture given in preparation for a review lecture on the operation of thermoacoustic engines and refrigerators. The author begins by a brief review of the thermodynamic principles underlying the operation of thermoacoustic engines and refrigerators. Remember from thermodynamics class that there are two kinds of heat engines, the heat engine or the prime mover which produces work from heat, and the refrigerator or heat pump that uses work to pump heat. The device operates between two thermal reservoirs at temperatures T{sub hot} and T{sub cold}. In the heat engine, heat flows into the device from the reservoir at T{sub hot}, produces work, and delivers waste heat into the reservoir at T{sub cold}. In the refrigerator, work flows into the device, lifting heat Q{sub cold} from reservoir at T{sub cold} and rejecting waste heat into the reservoir at T{sub hot}.
Swift, G.
CHEMICAL ENGINEERING AT McGILL Bachelor of Engineering in Chemical Engineering
CHEMICAL ENGINEERING AT McGILL Bachelor of Engineering in Chemical Engineering What is chemical engineering? Chemical engineers design processes and systems that produce everything from plastics and paper to pharmaceuticals, processed foods and advanced materials.What a chemist might produce in a test tube, chemical
Barthelat, Francois
COMPUTER ENGINEERING AT McGILL Bachelor of Engineering in Computer Engineering
COMPUTER ENGINEERING AT McGILL Bachelor of Engineering in Computer Engineering What is computer engineering? It's almost impossible to imagine our contemporary world without computer technology. Almost on computers in some form or another, and computer engineers make it all possible.They design and develop
Engineering Fundamentals - Mechanical Engineering Topics, Version 4.0
The Mechanical Engineering module covers basic terms and concepts of mechanical engineering and discusses their applications in nuclear power plants. This course will ...
Toward Integrated Life-limit Materials Engineering of Turbine Engine ...
... the design and life management of future turbine engine rotor alloys and components. ... loading variables found in the operation of advanced turbine engines.
550andengineeringstanding. CME 462 PROCESS CONTROL. (3) Basic theory of automatic control devices. Technologies covered include coal, natural gas, nuclear, biomass, wind, solar and advanced technologies. Prereq: Engineering standing or consent of instructor. (Same as EGR 542.) CME 550 CHEMICAL REACTOR DESIGN. (3
The Breadth of Mechanical Engineering
;Industrial Engineering Industrial Economics Engineering Statistics Quality Control Cost and Time Estimating Astronautics Traffic Engineering #12;Building Construction and Equipment Planning and Contracts Structural Processes Foundry Metal Working Plastics Welding Material Removal Surface-Texture Control #12;Pumps
Fabrikant, Sara Irina
Mechanical, Aerospace and Civil Engineering
and Technology (IET); the Chartered Institution of Building Services Engineers (CIBSE), and the Energy Institute Institution of Building Services Engineers (CIBSE) The Energy Institute (EI) Institution of Civil Engineers
Heil, Matthias
First-wall, blanket, and shield engineering test program for magnetically confined fusion power reactors
The key engineering areas identified for early study relate to FW/B/S system thermal-hydraulics, thermomechnics, nucleonics, electromagnetics, assembly, maintenance, and repair. Programmatic guidance derived frm planning exercises involving over thirty organizations (laboratories, industries, and universities) has indicated (1) that meaningful near term engineering testing should be feasible within the bounds of a modest funding base, (2) that there are existing facilities and expertise which can be profitably utilized in this testing, and (3) that near term efforts should focus on the measurement of engineering data and the verification/calibration of predictive methods for anticipated normal operational and transient FW/B/S conditions. The remainder of this paper discusses in more detail the planning strategies, proposed approach to near term testing, and longer range needs for integrated FW/B/S test facilities.
Maroni, V.A.
Principles of models based engineering
This report describes a Models Based Engineering (MBE) philosophy and implementation strategy that has been developed at Los Alamos National Laboratory`s Center for Advanced Engineering Technology. A major theme in this discussion is that models based engineering is an information management technology enabling the development of information driven engineering. Unlike other information management technologies, models based engineering encompasses the breadth of engineering information, from design intent through product definition to consumer application.
Dolin, R.M.; Hefele, J.
Sandia National Laboratories Encryption Engine
engine pipeline full so that the encryption engine can run at full capacity in CBC mode or other encryption modes requiring feedback from previous ...
Engines, turbines and compressors directory
This book is a directory of engines, turbines and compressors. It adds and deletes compressor engines in use by the gas industry.
NREL: Wind Research - Systems Engineering
Computer-Aided Engineering Systems Engineering Controls Analysis Testing Utility Grid Integration Assessment Wind Resource Assessment Projects Facilities Research Staff Working...
Windward Engineering | Open Energy Information
Open Energy Info (EERE)
"Windward Engineering" Retrieved from "http:en.openei.orgwindex.php?titleWindwardEngineering&oldid353118" Categories: Clean Energy Organizations Companies Organizations...
SC e-journals, Engineering
Office of Scientific and Technical Information (OSTI)
Engineering Engineering ACM Transactions on Design Automation of Electronic Systems (TODAES) ACM Transactions on Embedded Computing Systems (TECS) ACS Nano Acta Mechanica Acta Mechanica Sinica Adsorption Advanced Engineering Materials Advanced Powder Technology Advanced Robotics Advances in Computational Mathematics Advances In Engineering Software Advances in Materials Science and Engineering - OAJ Advances in Mathematical Engineering - OAJ Advances in Optics and Photonics AlChE Journal Algorithmica American Journal of Engineering and Applied Sciences - OAJ Analog Integrated Circuits and Signal Processing Annals of Nuclear Energy Annual Review of Fluid Mechanics Annual Review of Materials Research Applicable Algebra in Engineering, Communication and Computing Applied Composite Materials
Chemical Engineering | More Science | ORNL
Chemical and Engineering Materials Clean Energy Nuclear Sciences Computer Science Earth and Atmospheric Sciences Materials Science and Engineering Mathematics Physics More Science Home | Science & Discovery | More Science | Engineering SHARE Engineering Engineering at ORNL is integrated with nearly all of the scientific research areas and user facilities. In particular, ORNL has core capabilities chemical engineering and systems engineering. Chemical engineering moves knowledge gained from fundamental chemical research toward applications. For example, this capability supports the development of fuel reprocessing techniques and enables radioisotope production, isotope separation, and development of isotope applications. This capacity also contributes to advances in energy efficiency, renewable
E85 Optimized Engine
A 5.0L V8 twin-turbocharged direct injection engine was designed, built, and tested for the purpose of assessing the fuel economy and performance in the F-Series pickup of the Dual Fuel engine concept and of an E85 optimized FFV engine. Additionally, production 3.5L gasoline turbocharged direct injection (GTDI) �??EcoBoost�?� engines were converted to Dual Fuel capability and used to evaluate the cold start emissions and fuel system robustness of the Dual Fuel engine concept. Project objectives were: to develop a roadmap to demonstrate a minimized fuel economy penalty for an F-Series FFV truck with a highly boosted, high compression ratio spark ignition engine optimized to run with ethanol fuel blends up to E85; to reduce FTP 75 energy consumption by 15% - 20% compared to an equally powered vehicle with a current production gasoline engine; and to meet ULEV emissions, with a stretch target of ULEV II / Tier II Bin 4. All project objectives were met or exceeded.
Stanley Bower
DNA repair decline during mouse spermiogenesis results in the accumulation of heritable DNA damage
The post-meiotic phase of mouse spermatogenesis (spermiogenesis) is very sensitive to the genomic effects of environmental mutagens because as male germ cells form mature sperm they progressively lose the ability to repair DNA damage. We hypothesized that repeated exposures to mutagens during this repair-deficient phase result in the accumulation of heritable genomic damage in mouse sperm that leads to chromosomal aberrations in zygotes after fertilization. We used a combination of single or fractionated exposures to diepoxybutane (DEB), a component of tobacco smoke, to investigate how differential DNA repair efficiencies during the three weeks of spermiogenesis affected the accumulation of DEB-induced heritable damage in early spermatids (21-15 days before fertilization, dbf), late spermatids (14-8 dbf) and sperm (7- 1 dbf). Analysis of chromosomalaberrations in zygotic metaphases using PAINT/DAPI showed that late spermatids and sperm are unable to repair DEB-induced DNA damage as demonstrated by significant increases (P<0.001) in the frequencies of zygotes with chromosomal aberrations. Comparisons between single and fractionated exposures suggested that the DNA repair-deficient window during late spermiogenesis may be less than two weeks in the mouse and that during this repair-deficient window there is accumulation of DNA damage in sperm. Finally, the dose-response study in sperm indicated a linear response for both single and repeated exposures. These findings show that the differential DNA repair capacity of post-meioitic male germ cells has a major impact on the risk of paternally transmitted heritable damage and suggest that chronic exposures that may occur in the weeks prior to fertilization because of occupational or lifestyle factors (i.e, smoking) can lead to an accumulation of genetic damage in sperm and result in heritable chromosomal aberrations of paternal origin.
Marchetti, Francesco; Marchetti, Francesco; Wryobek, Andrew J
DNA Repair Decline During Mouse Spermiogenesis Results in the Accumulation of Heritable DNA Damage
The post-meiotic phase of mouse spermatogenesis (spermiogenesis) is very sensitive to the genomic effects of environmental mutagens because as male germ cells form mature sperm they progressively lose the ability to repair DNA damage. We hypothesized that repeated exposures to mutagens during this repair-deficient phase result in the accumulation of heritable genomic damage in mouse sperm that leads to chromosomal aberrations in zygotes after fertilization. We used a combination of single or fractionated exposures to diepoxybutane (DEB), a component of tobacco smoke, to investigate how differential DNA repair efficiencies during the three weeks of spermiogenesis affected the accumulation of DEB-induced heritable damage in early spermatids (21-15 days before fertilization, dbf), late spermatids (14-8 dbf) and sperm (7-1 dbf). Analysis of chromosomal aberrations in zygotic metaphases using PAINT/DAPI showed that late spermatids and sperm are unable to repair DEB-induced DNA damage as demonstrated by significant increases (P<0.001) in the frequencies of zygotes with chromosomal aberrations. Comparisons between single and fractionated exposures suggested that the DNA repair-deficient window during late spermiogenesis may be less than two weeks in the mouse and that during this repair-deficient window there is accumulation of DNA damage in sperm. Finally, the dose-response study in sperm indicated a linear response for both single and repeated exposures. These findings show that the differential DNA repair capacity of post-meioitic male germ cells has a major impact on the risk of paternally transmitted heritable damage and suggest that chronic exposures that may occur in the weeks prior to fertilization because of occupational or lifestyle factors (i.e, smoking) can lead to an accumulation of genetic damage in sperm and result in heritable chromosomal aberrations of paternal origin.
Marchetti, Francesco; Marchetti, Francesco; Wyrobek, Andrew J.
Heavy Truck Engine Program
The Heavy Duty Truck Engine Program at Cummins embodied three significant development phases. All phases of work strove to demonstrate a high level of diesel engine efficiency in the face of increasingly stringent emission requirements. Concurrently, aftertreatment system development and refinement was pursued in support of these efficiency demonstrations. The program's first phase focused on the demonstration in-vehicle of a high level of heavy duty diesel engine efficiency (45% Brake Thermal Efficiency) at a typical cruise condition while achieving composite emissions results which met the 2004 U.S. EPA legislated standards. With a combination of engine combustion calibration tuning and the development and application of Urea-based SCR and particulate aftertreatment, these demonstrations were successfully performed by Q4 of 2002. The second phase of the program directed efforts towards an in-vehicle demonstration of an engine system capable of meeting 2007 U.S. EPA legislated emissions requirements while achieving 45% Brake Thermal Efficiency at cruise conditions. Through further combustion optimization, the refinement of Cummins Cooled EGR architecture, the application of a high pressure common rail fuel system and the incorporation of optimized engine parasitics, Cummins Inc. successfully demonstrated these deliverables in Q2 of 2004. The program's final phase set a stretch goal of demonstrating 50% Brake Thermal Efficiency from a heavy duty diesel engine system capable of meeting 2010 U.S. EPA legislated emissions requirements. Cummins chose to pursue this goal through further combustion development and refinement of the Cooled EGR system architecture and also applied a Rankine cycle Waste Heat Recovery technique to convert otherwise wasted thermal energy to useful power. The engine and heat recovery system was demonstrated to achieve 50% Brake Thermal Efficiency while operating at a torque peak condition in second quarter, 2006. The 50% efficient engine system was capable of meeting 2010 emissions requirements through the application of NOx and particulate matter reduction techniques proven earlier in the program.
Nelson, Christopher
Gas Turbine Repair Guideline: GE 6FA/FA+e, Volume 19: GE MS6001 Model FA/FA+e
Effect of laser e LED radiations associated or not on dorsal cutaneous wound repair in a rodent model: histologic study.
??The aim of the present investigation was to evaluate histologically tissue repair on dorsal cutaneous wounds in a rodent model treated with Laser and/or LED,� (more)
Ana Paula Cavalcanti de Sousa
Development of a rapid design procedure for emergency repair of bridge columns using fiber-reinforced polymers
with success including wet layup, winding with wet tow orthen installed; whereas, wet layup based fabrication of FRPfor emergency repair. FRP wet layup also allows for ease of
Slater, Susan E.
Plant Support Engineering: Generic Handbook for New System Engineers
In view of the demographics of todays nuclear plant system engineering organizations, newly hired and often inexperienced engineers are frequently assigned positions as system engineers. System engineering and training organizations are challenged with efficiently and effectively developing these individuals as expeditiously as possible.
FAMU-FSU College of Engineering Department of Mechanical Engineering
a conventional power cycle, for example, through a steam turbine or Stirling engine. Four main elements
Krothapalli, Anjaneyulu
The rapid recognition and repair of DNA damage is essential for the maintenance of genomic integrity and cellular survival. Multiple complex and interconnected DNA damage responses exist within cells to preserve the human genome, and these repair pathways are carried out by a specifi c interplay of protein-protein interactions. Thus a failure in the coordination of these processes, perhaps brought about by a breakdown in any one multifunctional repair protein, can lead to genomic instability, developmental and immunological abnormalities, cancer and premature aging. This study demonstrates a novel interaction between two such repair proteins, Xeroderma pigmentosum group G protein (XPG) and Werner syndrome helicase (WRN), that are both highly pleiotropic and associated with inherited genetic disorders when mutated. XPG is a structure-specifi c endonuclease required for the repair of UV-damaged DNA by nucleotide excision repair (NER), and mutations in XPG result in the diseases Xeroderma pigmentosum (XP) and Cockayne syndrome (CS). A loss of XPG incision activity results in XP, whereas a loss of non-enzymatic function(s) of XPG causes CS. WRN is a multifunctional protein involved in double-strand break repair (DSBR), and consists of 3��5� DNA-dependent helicase, 3��5� exonuclease, and single-strand DNA annealing activities. Nonfunctional WRN protein leads to Werner syndrome, a premature aging disorder with increased cancer incidence. Far Western analysis was used to map the interacting domains between XPG and WRN by denaturing gel electrophoresis, which separated purifi ed full length and recombinant XPG and WRN deletion constructs, based primarily upon the length of each polypeptide. Specifi c interacting domains were visualized when probed with the secondary protein of interest which was then detected by traditional Western analysis using the antibody of the secondary protein. The interaction between XPG and WRN was mapped to the C-terminal region of XPG as well as the C-terminal region of WRN. The physical interaction between XPG and WRN links NER, (made evident by the disease XP) with DSBR, which imparts additional knowledge of the overlapping nature of these two proteins and the previously distinct DNA repair pathways they are associated with. Since genomic integrity is constantly threatened by both endogenous and exogenous (internal and external) damage, understanding the roles of these proteins in coordinating DNA repair processes with replication will signifi cantly further understanding how defects instigate physiological consequences in response to various DNA damaging sources. This ultimately contributes to our understanding of cancer and premature aging.
Rangaraj, K.; Cooper, P.K.; Trego, K.S.
Director for Engineering
Electrical Systems Design Fire Alarm Systems Audio/Video Systems Energy Analysis Power & Light Analysis Cordero Manager for Architectural Services Jeff Sutherland, AIA Manager for Electrical Engineering David Contract Management Construction Inspection HVAC Design Plumbing Design Fire Suppression System Energy
Engineering responses to pandemics
Focusing on pandemic influenza, this chapter approaches the planning for and response to such a major worldwide health event as a complex engineering systems problem. Action-oriented analysis of pandemics requires a broad inclusion of academic disciplines ...
Richard C. Larson; Karima R. Nigmatulina
Engineering secure software
In recent years computer software has gained notoriety for the endemic nature of security problems in software. These problems have been exploited with malicious intent by attackers. Most attempts at fixing these problems have been after-the-fact fixes in the form of software patches. The root causes for security problems in software are explored. A survey of research attempts at engineering secure software is presented. The techniques discussed range from those that are very similar to classical software engineering, to those that may be used in analyses of security requirements, as well as tools that can help engineer secure software. The survey classifies the approaches as process-oriented and as tools-oriented. The current approaches are incomplete in nature. They seem to address the security problem in parts and not in the whole. A comprehensive methodology, integrated with evolutionary software engineering practices is presented. The methodology combines both process and tools oriented approaches to construct secure software.
Jetly, Prateek
This 2008 meeting will celebrate our conference tradition of high quality and relevance to both industrial and academic participants, with topics ranging from the frontiers of fundamental science to the practical aspects of metabolic engineering.
Department Of Engineering.
& Engineering Materials for nuclear energy system, fission reactors, nuclear fuels, energy policy solidification; microgravity processing. Xudong Wang Assistant Professor, Materials Sci & Eng Nanomaterials and photoelectrochemical devices; nanomaterials for energy storage; nanoelectronics; nano-biomaterials. Jay Samuel Senior
Li, Yi
Displacer for Stirling engine
In a Stirling engine and the like, a displacer piston having a plurality of internal baffles and insulation so as to prevent undesired heat transfer across the displacer piston.
Brown, A. T.
Omnivorous Engine Project
The new U.S. Renewable Fuel The new U.S. Renewable Fuel Standard requires that the production of ethanol and advanced biofuels be increased to 36 billion gallons by 2022. The production of ethanol will be capped at 15 billion gallons, leaving 21 billion gallons to come from other sources such as bio-butanol. While current flex-fuel engines are designed and calibrated to use gasoline, they do not take full advantage of the specific beneficial properties of alternative fuels and do not operate at maximum efficiency. Argonne's Approach Argonne's Center for Transportation Research set up a dedicated test engine for alternative fuels research. Its key features are: * State-of-the-art engine test cell with low- and high-speed data acquisition * Modern, fully-instrumented 4-cylinder direct-injection engine
6 6 I N S P E C T I O N R E P O R T U.S. DEPARTMENT OF ENERGY OFFICE OF INSPECTOR GENERAL OFFICE OF INSPECTIONS FOLLOW-ON INSPECTION OF THE DEPARTMENT OF ENERGY'S VALUE ENGINEERING PROGRAM DECEMBER 2001 U.S. DEPARTMENT OF ENERGY Washington, DC 20585 December 20, 2001 MEMORANDUM FOR THE SECRETARY FROM: Gregory H. Friedman /s/ Inspector General SUBJECT: INFORMATION: Report on "Follow-on Inspection of the Department of Energy's Value Engineering Program" BACKGROUND Value Engineering is a recognized management tool which, if properly implemented and executed, can streamline operations, improve quality, and reduce costs. Through the use of methodologies such as Value Engineering, Federal agencies are realizing an average of more than $20 in savings/costs avoidance for each dollar spent on performing the value effort.
NEHRP - Earthquake Engineering Research Needs Reports
Library. Research Needs Reports Earthquake Engineering. Earthquake Engineering. 2004. Preventing Earthquake Disasters ...
Chemical Engineering & Processing Humidity Information at ...
NIST Home > Chemical Engineering & Processing Humidity Information at NIST. Chemical Engineering & Processing Humidity Information at NIST. ...
Enhancement of DNA repair capacity of mammalian cells by carcinogen treatment
To determine whether DNA excision repair is enhanced in mammalian cells in response to DNA damage, as it is in bacteria as part of the SOS response, we used an expression vector-host cell reactivation assay to measure cellular DNA repair capacity. When UV-damaged chloramphenicol acetyltransferase (CAT) vector DNA was introduced into monkey cells (CV-1), the level of CAT activity was inversely related to the UV fluence due to inhibition of CAT gene expression by UV photoproducts. When CV-1 cells were treated with either UV radiation or mitomycin C, 24-48 h before transfection, CAT expression from the UV-irradiated plasmid was increased. This increase also occurred in a line of normal human cells, but not in repair-deficient human xeroderma pigmentosum cells. We confirmed that this increase in CAT expression was due to repair, and not to production of damage-free templates by recombination; the frequency of generation of supF+ recombinants after transfection with UV-irradiated pZ189 vectors carrying different point mutations in the supF gene did not significantly increase in carcinogen-treated CV-1 cells. From these results we conclude that carcinogen treatment enhances the excision-repair capacity of normal mammalian cells.
Protic, M.; Roilides, E.; Levine, A.S.; Dixon, K.
At the Department of Energy, Richland Operations (DOE-RL) Hanford site in eastern Washington, a 350 mm (14 inch) diameter high density polyethylene (HDPE) pump recirculation pipeline failed at a bonded joint adjacent to a radiologically and chemically contaminated groundwater storage basin. The responsible DOE-RL contractor, CH2MHill Plateau Remediation Company, applied a fiberglass reinforced plastic (composite) field repair system to the failed joint. The system was devised specifically for the HDPE pipe repair at the Hanford site, and had not been used on this type of plastic piping previously. This paper introduces the pipe failure scenario, describes the options considered for repair and discusses the ultimate resolution of the problem. The failed pipeline was successfully returned to service with minimal impact on waste water treatment plant operating capacity. Additionally, radiological and chemical exposures to facility personnel were maintained as low as reasonably achievable (ALARA). The repair is considered a success for the near term, and future monitoring will prove whether the repair can be considered for long term service and as a viable alternative for similar piping failures at the Hanford site.
Diesel Engine Analysis Guide
This guide provides a thorough background on diesel engine analysis including combustion, vibration, and ultrasonic analysis theory. Interpretation of results is also provided. This guide is intended to enable nuclear utility personnel to make informed decisions regarding the nature and use of diesel engine analysis, including how to set up an effective program, how to establish analysis guidelines, how to make use of the resulting data to plan maintenance, determine the causes of off-design operating co...
NGNP Engineering Status
The objectives of Phase 1 Engineering and Design scope are to: 1) complete the initial design activities for a prototype nuclear reactor and plant that is capable of co-generating electricity, hydrogen, and process heat; 2) identify technological aspects of the NGNP that need further advancement by research and development activities; and 3) provide engineering support to the early licensing process, including technical input to white papers and developing the basis for future safety analyses.
John Collins
Liquid metal thermoacoustic engine
We are studying a liquid metal thermoacoustic engine both theoretically and experimentally. This type of engine promises to produce large quantities of electrical energy from heat at modest efficiency with no moving parts. A sound wave is usually thought of as consisting of pressure oscillations, but always attendant to the pressure oscillation are temperature oscillations. The combination produces a rich variety of ''thermoacoustic'' effects. These effects are usually so small that they are never noticed in everyday life; nevertheless under the right circumstances they can be harnessed to produce powerful heat engines, heat pumps, and refrigerators. In our liquid metal thermoacoustic engine, heat flow from a high temperature source to a low temperature sink generates a high-amplitude standing acoustic wave in liquid sodium. This acoustic power is converted to electric power by a simple magnetohydrodynamic effect at the acoustic oscillation frequency. We have developed a detailed thermoacoustic theory applicable to this engine, and find that a reasonably designed liquid sodium engine operating between 700/sup 0/C and 100/sup 0/C should generate about 60 W/cm/sup 2/ of acoustic power at about 1/3 of Carnot's efficiency. Construction of a 3000 W-thermal laboratory model engine has just been completed, and we have exciting preliminary experimental results as of the time of preparation of this manuscript showing, basically, that the engine works. We have also designed and built a 1 kHz liquid sodium magnetohydrodynamic generator and have extensive measurements on it. It is now very well characterized both experimentally and theoretically. The first generator of its kind, it already converts acoustic power to electric power with 40% efficiency. 16 refs., 5 figs.
Swift, G.W.; Migliori, A.; Wheatley, J.C.
Stirling engine power control
A power control method and apparatus for a Stirling engine including a valved duct connected to the junction of the regenerator and the cooler and running to a bypass chamber connected between the heater and the cylinder. An oscillating zone of demarcation between the hot and cold portions of the working gas is established in the bypass chamber, and the engine pistons and cylinders can run cold.
Fraser, James P. (Scotia, NY)
Intrinsically irreversible heat engine
A class of heat engines based on an intrinsically irreversible heat transfer process is disclosed. In a typical embodiment the engine comprises a compressible fluid that is cyclically compressed and expanded while at the same time being driven in reciprocal motion by a positive displacement drive means. A second thermodynamic medium is maintained in imperfect thermal contact with the fluid and bears a broken thermodynamic symmetry with respect to the fluid. The second thermodynamic medium is a structure adapted to have a low fluid flow impedance with respect to the compressible fluid, and which is further adapted to be in only moderate thermal contact with the fluid. In operation, thermal energy is pumped along the second medium due to a phase lag between the cyclical heating and cooling of the fluid and the resulting heat conduction between the fluid and the medium. In a preferred embodiment the engine comprises an acoustical drive and a housing containing a gas which is driven at a resonant frequency so as to be maintained in a standing wave. Operation of the engine at acoustic frequencies improves the power density and coefficient of performance. The second thermodynamic medium can be coupled to suitable heat exchangers to utilize the engine as a simple refrigeration device having no mechanical moving parts. Alternatively, the engine is reversible in function so as to be utilizable as a prime mover by coupling it to suitable sources and sinks of heat.
Wheatley, J.C.; Swift, G.W.; Migliori, A.
Engine Removal Projection Tool
The US Navy has over 3500 gas turbine engines used throughout the surface fleet for propulsion and the generation of electrical power. Past data is used to forecast the number of engine removals for the next ten years and determine engine down times between removals. Currently this is done via a FORTRAN program created in the early 1970s. This paper presents results of R&D associated with creating a new algorithm and software program. We tested over 60 techniques on data spanning 20 years from over 3100 engines and 120 ships. Investigated techniques for the forecast basis including moving averages, empirical negative binomial, generalized linear models, Cox regression, and Kaplan Meier survival curves, most of which are documented in engineering, medical and scientific research literature. We applied those techniques to the data, and chose the best algorithm based on its performance on real-world data. The software uses the best algorithm in combination with user-friendly interfaces and intuitively understandable displays. The user can select a specific engine type, forecast time period, and op-tempo. Graphical displays and numerical tables present forecasts and uncertainty intervals. The technology developed for the project is applicable to other logistic forecasting challenges.
Ferryman, Thomas A.; Matzke, Brett D.; Wilson, John E.; Sharp, Julia L.; Greitzer, Frank L.
A class of heat engines based on an intrinsically irreversible heat transfer process is disclosed. In a typical embodiment the engine comprises a compressible fluid that is cyclically compressed and expanded while at the same time being driven in reciprocal motion by a positive displacement drive means. A second thermodynamic medium is maintained in imperfect thermal contact with the fluid and bears a broken thermodynamic symmetry with respect to the fluid. the second thermodynamic medium is a structure adapted to have a low fluid flow impedance with respect to the compressible fluid, and which is further adapted to be in only moderate thermal contact with the fluid. In operation, thermal energy is pumped along the second medium due to a phase lag between the cyclical heating and cooling of the fluid and the resulting heat conduction between the fluid and the medium. In a preferred embodiment the engine comprises an acoustical drive and a housing containing a gas which is driven at a resonant frequency so as to be maintained in a standing wave. Operation of the engine at acoustic frequencies improves the power density and coefficient of performance. The second thermodynamic medium can be coupled to suitable heat exchangers to utilize the engine as a simple refrigeration device having no mechanical moving parts. Alternatively, the engine is reversible in function so as to be utilizable as a prime mover by coupling it to suitable sources and sinks of heat.
Wheatley, John C. (Los Alamos, NM); Swift, Gregory W. (Los Alamos, NM); Migliori, Albert (Santa Fe, NM)
A class of heat engines based on an intrinsically irreversible heat transfer process is disclosed. In a typical embodiment the engine comprises a compressible fluid that is cyclically compressed and expanded while at the same time being driven in reciprocal motion by a positive displacement drive means. A second thermodynamic medium is maintained in imperfect thermal contact with the fluid and bears a broken thermodynamic symmetry with respect to the fluid. The second thermodynamic medium is a structure adapted to have a low fluid flow impedance with respect to the compressible fluid, and which is further adapted to be in only moderate thermal contact with the fluid. In operation, thermal energy is pumped along the second medium due to a phase lag between the cyclical heating and cooling of the fluid and the resulting heat conduction between the fluid and the medium. In a preferred embodiment the engine comprises an acoustical drive and a housing containing a gas which is driven at a resonant frequency so as to be maintained in a standing wave. Operation of the engine at acoustic frequencies improves the power density and coefficient of performance. The second thermodynamic medium can be coupled to suitable heat exchangers to utilize the engine as a simple refrigeration device having no mechanical moving parts. Alternatively, the engine is reversible in function so as to be utilizable as a prime mover by coupling it to suitable sources and sinks of heat. 11 figs.
Multiphase Stirling Engines
Analysis, design, fabrication, and experimental assessment of a symmetric three-phase free-piston Stirling engine system is discussed in this paper. The system is designed to operate with moderate-temperature heat input that is consistent with solar-thermal collectors. Diaphragm pistons and nylon flexures are considered for this prototype to eliminate surface friction and to provide appropriate seals. In addition, low loss diaphragm pistons, etched and woven-wire screen heat exchangers, and plastic flexures, as the main components of the system, are outlined. The experimental results are presented and compared with design analysis. Experiments successfully confirm the design models for heat exchanger flow friction losses and gas spring hysteresis dissipation. Furthermore, it is revealed that gas spring hysteresis loss is an important dissipation phenomenon for low-power Stirling engines and should be carefully addressed in design. Analysis shows that the gas hysteresis dissipation is reduced drastically by increasing the number of phases in a multiphase Stirling engine system. It is further shown that for an even number of phases, half of the engine chambers could be eliminated by utilizing a reversing mechanism within the multiphase system. The mathematical formulation and modal analysis of multiphase Stirling engine system are then extended to a system that incorporates a reverser. By introducing a reverser to the fabricated prototype, the system successfully operates in engine mode. The system proves its self-starting capability and validates the computed start-up temperature. ?DOI: 10.1115/1.3097274? 1
Artin Der Minassians; Seth R. Sanders
Chemical and Paper Engineering Student Handbook
Chemical and Paper Engineering Student Handbook 2010-2011 #12;i Table of Contents 2010-2011 Letter-2011.......................................................................... 32 Chemical Engineering Major Curriculum .......................................... 2010.............................. Double Major: Chemical Engineering and Paper Science and Engineering......... 60 Chemical Engineering
SNF Project Engineering Process Improvement Plan
This plan documents the SNF Project activities and plans to support its engineering process. It describes five SNF Project Engineering initiatives: new engineering procedures, qualification cards process; configuration management, engineering self assessments, and integrated schedule for engineering activities.
E-Alerts: Combustion, engines, and propellants (reciprocation and rotating combustion engines). E-mail newsletter
Design, performance, and testing of reciprocating and rotating engines of various configurations for all types of propulsion. Includes internal and external combustion engines; engine exhaust systems; engine air systems components; engine structures; stirling and diesel engines.
Fundamental Interaction Mechanisms of Engineered ...
Fundamental Interaction Mechanisms of Engineered Nanomaterials with DNA. Summary: We utilized isotope-dilution liquid ...
The Honolulu Engineer District Introduction
with jurisdiction over the Honolulu, Far East, and Okinawa districts.' Several histories of the engineer wartime
US Army Corps of Engineers
Genetically Engineered Ethanol Producing Microorganisms ...
Search PNNL. PNNL Home; About; Research; Publications; Jobs; News; Contacts; Genetically Engineered Ethanol Producing Microorganisms. Battelle ...
Engineering Research Division publication report
This bibliography with abstracts lists citations of 118 formal reports in electronics engineering. (LEW)
Miller, E.K.; Livingston, P.L.
Information Systems Engineering Guidance (ISEG)
Departmental Information Systems Engineering (DISE) Departmental Information Systems Engineering (DISE) Volume 1 Information Systems Engineering Lifecycle January 31, 2002 Software Quality and Systems Engineering Program Office of the Associate CIO of Architecture, Standards & Planning Office of the Chief Information Officer Title Page Document Series: Departmental Information Systems Engineering Document Name: Volume 1, Information Systems Engineering Lifecycle Publication Date: 01/31/02 Document Owner: Software Quality and Systems Engineering Program Office of the Associate CIO of Architecture, Standards & Planning The concepts and processes in this document are aligned with the DOE Information Management (IM) Strategic Plan Mission and Goals. The Information Management Mission is:
The Role of DNA double-strand break repair in cellular response to low
DNA double-strand break repair in cellular response to low DNA double-strand break repair in cellular response to low dose radiation exposure. David J. Chen Division of Molecular Radiation Biology, Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas TX 75390 It has been assumed that molecular pathways that involved in the biological response for low dose of radiation should be similar to those for high dose radiation in general. The low dose-rate effect and DNA double-strand break repair are inextricably linked in mammalian cells. It has been reported that mammalian mutant cells deficient in nonhomologous end join (NHEJ) pathway have little or no cellular recovery when expose to low-dose-rate radiation. Recently, it has also been reported that cells deficient in
Emailed Comments of Elizabeth Chimento RE: Pepco Scheduled Line Repair Dec.
Emailed Comments of Elizabeth Chimento RE: Pepco Scheduled Line Emailed Comments of Elizabeth Chimento RE: Pepco Scheduled Line Repair Dec. 1-20, 2006 Emailed Comments of Elizabeth Chimento RE: Pepco Scheduled Line Repair Dec. 1-20, 2006 Docket No. EO-05-01. Regarding the planned line outage, scheduled for Feb. 20 through Mar. 6, I am requesting that the residents near the plant be moved for the duration of the outage to protect their health. Emailed Comments of Elizabeth Chimento RE: Pepco Scheduled Line Repair Dec. 1-20, 2006 More Documents & Publications Letter from Elizabeth Chimento and Poul Hertel to the Federal Energy Regulatory Commission Re: District of Columbia Public Service Commission Emergency Petition and Complaint Docket No. EL05-145-000 Re: Potomac River Generating Station Department of Energy Case No.
Evaluation of bisphenol E cyanate ester for the resin-injection repair of advanced composites
This thesis is a compilation of a general introduction and literature review that ties together the subsequent chapters which consist of two journal articles that have yet to be submitted for publication. The overall topic relates to the evaluation and application of a new class of cyanate ester resin with unique properties that lend it applicable to use as a resin for injection repair of high glass transition temperature polymer matrix composites. The first article (Chapter 2) details the evaluation and optimization of adhesive properties of this cyanate ester and alumina nanocomposites under different conditions. The second article (Chapter 3) describes the development and evaluation of an injection repair system for repairing delaminations in polymer matrix composites.
Wilber Yaote Lio
Ceramic Automotive Stirling Engine Program
The Ceramic Automotive Stirling Engine Program evaluated the application of advanced ceramic materials to an automotive Stirling engine. The objective of the program was to evaluate the technical feasibility of utilizing advanced ceramics to increase peak engine operating temperature, and to evaluate the performance benefits of such an increase. Manufacturing cost estimates were also developed for various ceramic engine components and compared with conventional metallic engine component costs.
September 2006 Quarterly Technical Report September 2006 Quarterly Technical Report Sixteenth Technical Quarterly Report: July 2006 - September 2006 Cooperative Agreement Award Number DE-FC-01NT41332 Submitted to the United States Department of Energy National Energy Technology Laboratory ADD Document Control by BP Exploration (Alaska), Inc. Robert Hunter (Principal Investigator) P.O. Box 196612 Anchorage, Alaska 99519-6612 Email: email@example.com email@example.com Tel: (907)-339-6377 with University of Alaska Fairbanks Shirish Patil (Principal Investigator) 425 Duckering Building P.O. Box 755880 Fairbanks, Alaska 99775-5880 and Arizona Board of Regents University of Arizona, Tucson Robert Casavant (Principal Investigator) Dept. Mining and Geological Engineering Rm. 245, Mines and Metallurgy Bldg. #12
Single rotor turbine engine
There has been invented a turbine engine with a single rotor which cools the engine, functions as a radial compressor, pushes air through the engine to the ignition point, and acts as an axial turbine for powering the compressor. The invention engine is designed to use a simple scheme of conventional passage shapes to provide both a radial and axial flow pattern through the single rotor, thereby allowing the radial intake air flow to cool the turbine blades and turbine exhaust gases in an axial flow to be used for energy transfer. In an alternative embodiment, an electric generator is incorporated in the engine to specifically adapt the invention for power generation. Magnets are embedded in the exhaust face of the single rotor proximate to a ring of stationary magnetic cores with windings to provide for the generation of electricity. In this alternative embodiment, the turbine is a radial inflow turbine rather than an axial turbine as used in the first embodiment. Radial inflow passages of conventional design are interleaved with radial compressor passages to allow the intake air to cool the turbine blades.
Platts, David A. (Los Alamos, NM)
DNA repair in cells sensitive and resistant to cis-diamminedichloroplatinum(II): Host cell reactivation of damaged plasmid DNA
cis-Diamminedichloroplatinum(II) (cis-DDP) has a broad clinical application as an effective anticancer drug. However, development of resistance to the cytotoxic effects is a limiting factor. In an attempt to understand the mechanism of resistance, the authors have employed a host cell reactivation assay of DNA repair using a cis-DDP-damaged plasmid vector. The efficiency of DNA repair was assayed by measuring the activity of an enzyme coded for by the plasmid vector. The plasmid expression vector pRSV cat contains the bacterial gene coding for chloramphenicol acetyltransferase (CAT) in a configuration which permits expression in mammalian cells. The plasmid was transfected into repair-proficient and -deficient Chinese hamster ovary cells, and CAT activity was subsequently measured in cell lysates. In the repair-deficient cells, one cis-DDP adduct per cat gene was sufficient to eliminate expression. An equivalent inhibition of CAT expression in the repair-proficient cells did not occur until about 8 times the amount of damage was introduced into the plasmid. These results implicate DNA intrastrand cross-links as the lesions responsible for the inhibition of CAT expression. This assay was used to investigate the potential role of DNA repair in mediating cis-DDP resistance in murine leukemia L1210 cells. The assay readily detects the presence or absence of repair and confirms that these resistant L1210 cells have an enhanced capacity for repair of cis-DDP-induced intrastrand cross-links.
Sheibani, N.; Jennerwein, M.M.; Eastman, A. (Univ. of Nebraska Medical Center, Omaha (USA))
MAINTENANCE SHOP The shop manager, Clint Steffan has over 25 years experience in Electronic design, test, and repair in
MAINTENANCE SHOP The shop manager, Clint Steffan has over 25 years experience in Electronic design the capability of repairing most electronic, mechanical and electro-mechanical equipment, including refrigeration source for parts instead of buying from equipment manufacturer. Repair/recharge small refrigeration
Lajeunesse, Marc J.
BEW Engineering | Open Energy Information
BEW Engineering BEW Engineering Jump to: navigation, search Name BEW Engineering Place San Ramon, California Zip 94583 Sector Services Product BEW Engineering provides engineering consulting services, and performs research and development in electrical power systems for bulk power and distributed energy resource applications. References BEW Engineering[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. BEW Engineering is a company located in San Ramon, California . References ↑ "BEW Engineering" Retrieved from "http://en.openei.org/w/index.php?title=BEW_Engineering&oldid=342696" Categories: Clean Energy Organizations Companies Organizations Stubs What links here
Free-piston engine
A combustion system which can utilize high compression ratios, short burn durations, and homogeneous fuel/air mixtures in conjunction with low equivalence ratios. In particular, a free-piston, two-stroke autoignition internal combustion engine including an electrical generator having a linear alternator with a double-ended free piston that oscillates inside a closed cylinder is provided. Fuel and air are introduced in a two-stroke cycle fashion on each end, where the cylinder charge is compressed to the point of autoignition without spark plugs. The piston is driven in an oscillating motion as combustion occurs successively on each end. This leads to rapid combustion at almost constant volume for any fuel/air equivalence ratio mixture at very high compression ratios. The engine is characterized by high thermal efficiency and low NO.sub.x emissions. The engine is particularly suited for generating electrical current in a hybrid automobile.
Van Blarigan, Peter (Truckee, CA)
Departmental Information Systems Engineering (DISE) Departmental Information Systems Engineering (DISE) Guidance Volume 2 Managing DOE IT Projects March 26, 2002 Revised December 27, 2002 Developed by the Software Quality and Systems Engineering Program Office of the Chief Information Officer Departmental Information Systems Engineering Guidance Title Page Document Series: Departmental Information Systems Engineering (DISE) Guidance Document Name: Volume 2, Managing DOE IT Projects Publication Date: 03/26/03, Revised 12/27/02 Document Owner: Office of the Chief Information Officer Software Quality and Systems Engineering Brenda Coblentz, IM-21, Program Manager Acknowledgement: Wayne Jones, author of the DOE (HQ) IM Project Management Guide, September 1998
Value engineering: A new focus for women in engineering
Value Engineering is an organized problem solving technique that utilizes communication and teamwork skills -- skills heralded as strengths for women. Value Engineering offers an excellent career opportunity for women in the engineering profession. It is an expanded career path that is currently being overlooked by women. Value Engineering is supported by SAVE (Society of American Value Engineers) and certification in the process can be achieved in two years. For women in the engineering profession, VE is an ideal place to redirect their existing skills and training. The number of certified women is a minority, creating a wide-open field of opportunity in federal and state agencies as well as private industry. Value Engineering can provide that new avenue for engineering careers -- a new direction where current skills can be applied to a diverse and exciting profession. 1 fig.
Anderson, L.C.
Automotive Stirling Engine Development Program Mod I Stirling engine development
The Automotive Stirling Engine (ASE) Development Program was established to enable research and development of alternate propulsion systems. The program was awarded to Mechanical Technology Incorporated (MTI) for the purpose of developing an automotive Stirling engine, and transferring Stirling-engine technology to the United States. MTI has fabricated and tested four Mod I engines that have accumulated over 1900 test hours to date. The engines evaluated in the test cell have achieved an average of 34.5% efficiency at their maximum efficiency point (2000 rpm), and have developed an average maximum output power (power available to the drive train) level of 54.4 kW (73.2 bhp). All engines are still operating, and are being used to develop components and control strategy for the Upgraded Mod I engine design (predicted to increase maximum power output and efficiency while reducing total engine system weight).
Simetkosky, M.A.
A key-based coordination algorithm for dynamic readiness and repair service coordination
This paper describes an agent application for the coordination of air-craft repair, refit, refuel, and rearm teams in a dynamic setting. The paper also presents a new algorithm for dynamic distributed service team coordination and compares its performance ... Keywords: TAEMS, coordination, dynamic, intelligent agents, multi-agent systems, real-time, teams
Tom Wagner; Valerie Guralnik; John Phelps
Simulation and validation of repair welding and heat treatment of an alloy 718 plate
This paper describes simulation of repair welding and heat treatment together with measurements for validation. The possibility to replace global heat treatment with local using induction heating is evaluated with respect to obtained residual stresses. ... Keywords: Dislocation density based plasticity model, Finite element simulation, Heat treatment, Induction heating, Residual stress measurement
M. Fisk; A. Lundb�Ck
The Effect of Price Expectations on Auto-Repair Price Quotes
We show that price expectations alter outcomes in a negotiated price environment. By experimentally manipulating the price expectations that consumers communicate to firms, we show that consumers � price expectations alter outcomes by directly changing firms � behavior. We implement a large-scale field experiment in which callers request price quotes from automotive repair shops. We find that repair shops quote higher prices if they know that callers � perception of the market price is high. We find that women are quoted higher prices than men when callers signal that they are uninformed about market prices. However, gender differences disappear when callers mention an expected price for the repair. Finally, we find that repair shops are more likely to offer In an environment in which prices customarily are negotiated, it can be difficult and time-consuming for consumers to gather enough information to create a good estimate of the market price. This phenomenon is common to many industries: buying a car entails lengthy negotiations in which dealers want to know about a consumer�s current vehicle, her financing preferences, the available
Meghan R. Busse; Florian Zettelmeyer
Evaluation of Hardware and Procedures for Astronaut Assembly and Repair of Large Precision Reflectors
A detailed procedure is presented that enables astronauts in extravehicular activity (EVA) to efficiently assemble and repair large (i.e., greater than 10m-diameter) segmented reflectors, supported by a truss, for space-based optical or radio-frequency ...
Lake Mark S.; Jr Walter L. Heard; Watson Judith J.; Collins Timothy J.
Overview of NCHRP Design Guideline for EPS-Block Geofoam in Slope Stabilization and Repair
Manhattan College Bronx, New York 10471 Tel: (718) 826-7177 E-mail: email@example.com Dov and repair applications based on the results of National Cooperative Highway Research Program (NCHRP) Project was performed under NCHRP Project 24-11(01) and produced a design guideline for use of EPS blocks in stand
Horvath, John S.
Fagen Engineering LLC | Open Energy Information
Engineering LLC Place Granite Falls, Minnesota Zip 56241 Product Designs and builds ethanol production plants and other engineering projects. References Fagen Engineering LLC1...
Engineer, Sandia National Laboratories | National Nuclear Security...
National Nuclear Security Administration (NNSA)
Clifford Ho Engineer, Sandia National Laboratories Clifford Ho Clifford Ho Role: Engineer, Sandia National Laboratories Award: Asian American Engineer of the Year Profile: Clifford...
Clifford Ho, a Sandia engineer, has been selected by the Chinese Institute of Engineers - USA to receive the Asian American Engineer of the Year Award. The honor is...
BGA Engineering LLC | Open Energy Information
Solar Product Engineering firm specialising in substation engineering and design, power plant engineering and on-site generation, including cogeneration, solar and...
Mining Engineering Strategic Plan
, coal, base and ferrous metals. Action 1.3.2: The Tianfu Mining University Opportunity: Strengthen.1.2: Endowed Chair in Energy: Endow a $3 million Chair in Mining Engineering with emphasis on Energy form Coal Control, Mineral-Materials-Coal Processing, Mine Health and Safety, and Mine Survey laboratories. Action 4
Ragsdell, Kenneth M.
Mechanical engineering Department Seminar
power generation gas turbines and jet engines. As the energy efficiency of gas turbines in- creases to pro- vide thermal protection to turbine blades and vanes in the hottest sections of both electric with turbine inlet turbine, advances in turbine efficiency depend on improved ther- mal barrier coatings
the batteries, and to power accessories like the air condi- tioner and heater. Hybrid electric cars can exceed#12;#12;Hydrogen Fuel Cell Engines MODULE 8: FUEL CELL HYBRID ELECTRIC VEHICLES CONTENTS 8.1 HYBRID ELECTRIC VEHICLES .................................................................................. 8-1 8
Handbook of energy engineering
This book covers the following topics: Fundamentals of energy engineering; Energy economic analysis; Energy auditing and accounting; Electrical system optimization; Waste heat recovery; Utility system optimization; Heating, ventilation, air conditioning, and building system optimization; HVAC equipment; Cogeneration: theory and practice; Control systems; Computer applications; Thermal storage; Passive solar energy systems; and Energy management.
Mehta, D.P.; Thumann, A.
the Chair Advanced Power Systems Research Group Engineering Education Innovation Research Group Mechanics of MultiScale Materials Research Group MultiScale Systems and Sensors Research Group Space Systems Research Group Sustainable Manufacturing and Design Research Group Faculty Profiles Michigan
Engineering Annual Summary 1996
Fiscal year 1996 has been a year of significant change for the Lawrence Livermore National Laboratory (LLNL) in general and for Engineering in particular. Among these changes, the Laboratory`s national security mission was better defined, the stockpile stewardship program objectives became crisper, LLNL`s investment in high-performance computing was re-emphasized with the procurement of a $100 million supercomputer for the Laboratory`s Accelerated Strategic Computing Initiative (ASCI) program, two major Laser programs (the National Ignition Facility and Atomic Vapor Laser Isotope Separation) expanded significantly, and DOE`s human genome efforts moved to the next phase of development. In the area of business operations, LLNL`s Cost Cutting Initiative Program (CCIP) was completed and the Laboratory restructured its workforce using a Voluntary Separation Incentive Program (VSIP). Engineering similarly also saw many technical and programmatic successes, as well as changes, starting with completion of its strategic plan, significant consolidation of its facilities, restructuring of its workforce, reduction of its overhead costs, substantial transfers of staff between programs, and finally my personal arrival at Livermore. This report is the first opportunity to capture some of Engineering`s FY96 activities and accomplishments in a succinct fashion, and to relate these to our strategic plan.
Dimolitsas, S.
a solar-powered house that is energy-efficient, affordable, and attractive. ·Every graduating major of Energy Solar Decathlon 2013. Engineering and architecture students will design then build and operate to the future of Las Vegas. Their work is funded by agencies including the National Science Foundation
Hemmers, Oliver
Logic Engines as Interactors
We introduce a new programming language construct, Interactors , supporting the agent-oriented view that programming is a dialog between simple, self-contained, autonomous building blocks. We define Interactors ... Keywords: agent oriented programming language constructs, generalized iterators, logic engines, metaprogramming
Paul Tarau
Engineeringtechnology COLLEGE of ENGINEERING
to support the rapidly evolving advanced powertrain sector, including alternative fuel, clean diesel campus. Associate Professor Caisheng Wang's wind turbine tops the roof of the Engineering Technology Building, harnessing the wind to create a renewable energy system strong enough to power a computer lab
Chinnam, Ratna Babu
DOE Systems Engineering Methodology
Systems Engineering Methodology (SEM) In-Stage Assessment Process Guide Version 3 September 2002 U.S. Department of Energy Office of the Chief Information Officer In-Stage Assessment Process Date: September 2002 Page i Rev Date: Table of Contents Section Page 1.0 Overview .......................................................................................................................................... 1 Introduction........................................................................................................................ 1 Purpose .............................................................................................................................. 1 Who Conducts ...................................................................................................................
Cloud engineering is Search Based Software Engineering too
Many of the problems posed by the migration of computation to cloud platforms can be formulated and solved using techniques associated with Search Based Software Engineering (SBSE). Much of cloud software engineering involves problems of optimisation: ... Keywords: Cloud computing, Search Based Software Engineering (SBSE)
Mark Harman, Kiran Lakhotia, Jeremy Singer, David R. White, Shin Yoo
STM Stirling Engine-Generators
Stirling engines have recently been introduced to the distributed generation market. This project summarizes the experience of three projects implementing Stirling engine-generators from one manufacturer in applications where they are fueled with digester gas.
UCL Science Library Map Engineering
UCL Science Library Map Floor 4 Engineering Engineering Periodicals Guter Collection Sta Training Room Floor 3 Chemistry Computer Science Geology Geosciences Periodicals History of Science Maths Maths Periodicals Physical Sciences Periodicals Physics Computer Cluster Group Study Area Information Library
Crawford, Ian
International Governance of Climate Engineering
Solar Radiation Management Governance Initiative conference); Daniel Bodansky, Governing Climate Engineering: Scenarios for Analysis (Harvard Project on Climate Agreements,
Parson, Edward; Ernst, Lia
Organization - Nuclear Engineering Division (Argonne)
Nuclear Safety Materials Disposition Decontamination & Decommissioning Nuclear Criticality Safety Nuclear Data Program Nuclear Waste Form Modeling Departments Engineering...
Achievements: Nuclear Engineering Division (Argonne)
Argonne Chemical Sciences & Engineering - People
Ceramic Electrochemistry Electrochemical Projects Support Anthony Burrell Electrochemical Energy Storage Management and Support Basic Research Applied R&D Engineering...
Integrated Computational Materials Engineering (ICME)
Presentation Title, Integrated Computational Materials Engineering (ICME) in the Automotive Industry: Successes and Opportunities. Author(s), Louis Gerard�...
wind engineering & natural disaster mitigation
wind engineering & natural disaster mitigation #12;wind engineering & natural disaster mitigation Investment WindEEE Dome at Advanced Manufacturing Park $31million Insurance Research Lab for Better Homes $8million Advanced Facility for Avian Research $9million #12;wind engineering & natural disaster mitigation
Sinnamon, Gordon J.
Industrial Engineering Department Graduate Handbook
Handbook Page 4 Engineering Graduate Program if: (1) his/her undergraduate degree lacks fundamental by the student and the I.E. Graduate Advisor. #12;IE Department Graduate Handbook Page 5 4.2 Fundamental SystemsIndustrial Engineering Department Graduate Handbook Master of Science in Industrial Engineering
Rock, Chris
Engineering of markets and artifacts
In this paper, we continue the dialog started by Roth [19] between economics and engineering in the context of design of markets. We take the position that markets and engineered artifacts are thee the products of a social process of design formulation. ... Keywords: engineering design, market design, methodologies, modeling, testing
Eswaran Subrahmanian; Sarosh N. Talukdar
Engine idle speed control system
An idle speed control system is described for an internal combustion engine having a fuel delivery means for supplying fuel to the engine, the idle speed control system comprising in combination: means for controlling the fuel delivery means to supply a scheduled idle fuel quantity during a idle operating state of the engine; means for sensing the engine idle speed; integrator means responsive to the engine idle speed and a desired engine idle speed for adjusting the scheduled idle fuel quantity in direction and amount to cause correspondence between the engine idle speed and the desired engine idle speed, the integrator means adjustment being a measure of engine load conditions; and means for establishing the scheduled idle fuel quantity, the means including (A) means for establishing a family of curves as a function of the amount of integrator adjustment of the scheduled idle fuel quantity, each curve of the family of curves representing idle fuel quantity as a function of engine idle speed for a respective engine load condition, and (B) means for selecting the curve corresponding to the integrator adjustment of the scheduled idle fuel quantity and providing the scheduled fuel quantity from the selected curve in accord with the sensed engine idle speed.
Ament, F.
Ecological Engineering Undergraduate Advising Guide
, biochemistry and engineering analysis and design, students in this program will receive training in biology with ecological, agricultural and natural resource systems management. Students receive training in engineering engineering design and analysis techniques to address a wide range of ecological, agricultural and natural
Tullos, Desiree
CHEMICAL ENGINEERING Fall 2013-Winter 2014
ADVANCED CHEMICAL ENGINEERING Fall 2013-Winter 2014 Certificate Program CONTINUING AND PROFESSIONAL EDUCATIONCONTINUING AND PROFESSIONAL EDUCATION #12;About the Advanced Chemical Engineering Certificate Program The new Advanced Chemical Engineering Certificate Program offers professionals in chemi- cal engineering
California at Davis, University of
University of Ljubljana Faculty of Electrical Engineering
calculation for different criteria. Ancillary service management: load forecast, power system reserve forecast#12;2 3 University of Ljubljana Faculty of Electrical Engineering University of Ljubljana Faculty of Electrical Engineering Doctoral Programme Electrical Engineering Doctoral Programme Electrical Engineering
�?umer, Slobodan
ARM - Engineering Change Request & Engineering Change Order Guidelines
Change Request & Change Request & Engineering Change Order Guidelines Page Contents: Guideline for Starting a Request for a New ARM Product, Capability, or Functionality Engineering Task Tracking Tool Tracking Capabilities Getting Closure, the Baseline Change Request Glossary Engineering Change Request & Engineering Change Order Guidelines Requesting Engineered Products and Services in ARM Guideline for Starting a Request for a New ARM Product, Capability, or Functionality The purpose of this guideline is to establish a method that members of the ARM Infrastructure team may use to submit requests for products and services from the ARM Engineering Group. The concept of "new product, capability, or functionality" refers to the idea that requests the ARM Infrastructure Team to make to the Engineering Group that will ultimately
Vehicle Technologies Office: Combustion Engine Research
Combustion Engine Combustion Engine Research to someone by E-mail Share Vehicle Technologies Office: Combustion Engine Research on Facebook Tweet about Vehicle Technologies Office: Combustion Engine Research on Twitter Bookmark Vehicle Technologies Office: Combustion Engine Research on Google Bookmark Vehicle Technologies Office: Combustion Engine Research on Delicious Rank Vehicle Technologies Office: Combustion Engine Research on Digg Find More places to share Vehicle Technologies Office: Combustion Engine Research on AddThis.com... Just the Basics Hybrid & Vehicle Systems Energy Storage Advanced Power Electronics & Electrical Machines Advanced Combustion Engines Combustion Engines Emission Control Waste Heat Recovery Fuels & Lubricants Materials Technologies Combustion Engine Research
Engineered Fire Safety Group Staff Directory
Engineered Fire Safety Group Staff. Staff Listing. Thomas G. Cleary, (Acting) Leader, Chemical Engineer, 301-975-6858. Carla ...
SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM: Project Tracking...
SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM: Project Tracking Checklist SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM: Project Tracking Checklist The following checklist is...
SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM | Department of...
Training Checklist SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM More Documents & Publications SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM SOFTWARE QUALITY & SYSTEMS...
& SYSTEMS ENGINEERING PROGRAM: Project Planning Checklist SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM: Software Design Checklist Energy.gov Careers & Internships Policy &...
SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM: Project Planning...
SYSTEMS ENGINEERING PROGRAM: Requirements Management Checklist SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM: Project Tracking Checklist Energy.gov Careers & Internships Policy &...
SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM: Software Design...
SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM : Acceptance Checklist...
& SYSTEMS ENGINEERING PROGRAM: Software Design Checklist SOFTWARE QUALITY & SYSTEMS ENGINEERING PROGRAM: Project Tracking Checklist Energy.gov Careers & Internships Policy &...
Index Terms --Smart grid; power engineering education; power engineering curriculum; power engineering re-
1 Index Terms -- Smart grid; power engineering education; power engineering curriculum; power the United States power system has led to an engineering initiative va- riously known as `smart grid the smart grid will be educated, how they should be trained, and to what levels of comprehension
An improved engine is provided that more efficiently consumes difficult fuels such as coal slurries or powdered coal. The engine includes a precombustion chamber having a portion thereof formed by an ignition plug. The precombustion chamber is arranged so that when the piston is proximate the head, the precombustion chamber is sealed from the main cylinder or the main combustion chamber and when the piston is remote from the head, the precombustion chamber and main combustion chamber are in communication. The time for burning of fuel in the precombustion chamber can be regulated by the distance required to move the piston from the top dead center position to the position wherein the precombustion chamber and main combustion chamber are in communication.
Baker, Quentin A. (P.O. Box 6477, San Antonio, TX 78209); Mecredy, Henry E. (1630-C W. 6th, Austin, TX 78703); O' Neal, Glenn B. (6503 Wagner Way, San Antonio, TX 78256)
Engines Photo Archive
Engines Photo Archive Engines Photo Archive The following images may be used freely as long as they are accompanied by a statement that they were used "Courtesy of Argonne National Laboratory" (see our disclaimer). To download the high-resolution version of each picture, right-click on the "Download high-resolution image" text beneath the picture and select "Save Link As..." from the resulting pop-up menu. A researcher readies an endoscope to capture diesel emissions images. Diesel Emissions: Readying an endoscope to capture diesel emissions images.Photo courtesy of Argonne National Laboratory. Download high-resolution image. A researcher readies an endoscope to capture diesel emissions images. Diesel Particulates: Argonne's micro-imaging system for diesel particulates. Read story. Download high-resolution image.
HANFORD ENGINEER WORKS HANFORD ENGINEER WORKS IJd *P-t - - ~~~ssiticatiC+n cwcetted rat G.E. NUCLEONICS PROJECT xi I ~@L.%&~--G-ENERAI,@ ELECTRIC z ,m ._.__.-. _ I--..-. By Authority of. COMPANY ._ Atmic Energy Commission Office of Hanford Dire&xl Operations Riohland, Washington Attention; Mr. Carleton Shugg, Manager ./ ALPKA-ROLLED EL'GIL%I jw -879 ' . *_ a. f' Richland, Washington February 6, 1948 , Thla Dclc.Jv-
An Engineering Test Reactor
A relatively inexpensive reactor for the specific purpose of testing a sub-critical portion of another reactor under conditions that would exist during actual operation is discussed. It is concluded that an engineering tool for reactor development work that bridges the present gap between exponential and criticality experiments and the actual full scale operating reactor is feasible. An example of such a test reactor which would not entail development effort to ut into operation is depicted.
Fahrner, T.; Stoker, R.L.; Thomson, A.S.
Modular Aneutronic Fusion Engine
NASA's JUNO mission will arrive at Jupiter in July 2016, after nearly five years in space. Since operational costs tend to rise with mission time, minimizing such times becomes a top priority. We present the conceptual design for a 10MW aneutronic fusion engine with high exhaust velocities that would reduce transit time for a Jupiter mission to eighteen months and enable more challenging exploration missions in the solar system and beyond. __________________________________________________
Gary Pajer, Yosef Razin, Michael Paluszek, A.H. Glasser and Samuel Cohen
Stirling cycle engine
In a Stirling cycle engine having a plurality of working gas charges separated by pistons reciprocating in cylinders, the total gas content is minimized and the mean pressure equalization among the serial cylinders is improved by using two piston rings axially spaced at least as much as the piston stroke and by providing a duct in the cylinder wall opening in the space between the two piston rings and leading to a source of minimum or maximum working gas pressure.
Lundholm, Gunnar (Lund, SE)
MARS Flight Engineering Status
The Multi-sensor Airborne Radiation Survey Flight Engineering project (MARS FE) has designed a high purity germanium (HPGe) crystal array for conducting a wide range of field measurements. In addition to the HPGe detector system, a platform-specific shock and vibration isolation system and environmental housing have been designed to support demonstration activities in a maritime environment on an Unmanned Surface Vehicle (USV). This report describes the status of the equipment as of the end of FY09.
Fast, James E.; Dorow, Kevin E.; Morris, Scott J.; Thompson, Robert C.; Willett, Jesse A.
Photonically Engineered Incandescent Emitter
A photonically engineered incandescence is disclosed. The emitter materials and photonic crystal structure can be chosen to modify or suppress thermal radiation above a cutoff wavelength, causing the emitter to selectively emit in the visible and near-infrared portions of the spectrum. An efficient incandescent lamp is enabled thereby. A method for fabricating a three-dimensional photonic crystal of a structural material, suitable for the incandescent emitter, is also disclosed.
Gee, James M. (Albuquerque, NM); Lin, Shawn-Yu (Albuquerque, NM); Fleming, James G. (Albuquerque, NM); Moreno, James B. (Albuquerque, NM)
US Army Corps of Engineers BUILDING STRONG
® Office Structure Par 005 / Office of Engineer Inspector General 01 *Supv Engineer Inspector General GS-15 02 Engineer Inspector General Rep GS-13 03 Administrative Officer GS-09 *The Engineer InspectorUS Army Corps of Engineers BUILDING STRONG® Mission Briefing The Engineer Inspector General #12
Materials Science and Engineering
Materials Science and Engineering Materials Science and Engineering 1 Fe---Cr A lloys f or A dvanced N uclear E nergy A pplica9ons Ron S caEngineering 2 Thermodynamic S tabiliza9on o f G rain S ize The concept is that non---equilibrium solutes introduced by mechanical alloying can segregate to grain b oundaries, p roducing
Honda motor company's CVCC engine
Honda Motor Company of Japan in a four-year period from 1968 to 1872 designed, tested, and mass-produced a stratified charge engine, the CVCC, which in comparison to conventional engines of similar output at the time was lower in CO, HC and NO/sub x/ emissions and higher in fuel economy. Honda developed the CVCC engine without government assistance or outside help. Honda's success came at a time when steadily increasing fuel costs and the various provisions of the Clean Air Act had forced US automakers to consider possible alternatives to the conventional gasoline engine. While most major engine manufacturers had investigated some form of stratified charge engine, Honda's CVCC was the only one to find successful market application. This case study examines the circumstances surrounding the development of the CVCC engine and its introduction into the Japanese and American markets.
Abernathy, W.J.; Ronan, L.
Mechanical Engineering Department technical abstracts
The Mechanical Engineering Department publishes abstracts twice a year to inform readers of the broad range of technical activities in the Department, and to promote an exchange of ideas. Details of the work covered by an abstract may be obtained by contacting the author(s). General information about the current role and activities of each of the Department's seven divisions precedes the technical abstracts. Further information about a division's work may be obtained from the division leader, whose name is given at the end of each divisional summary. The Department's seven divisions are as follows: Nuclear Test Engineering Division, Nuclear Explosives Engineering Division, Weapons Engineering Division, Energy Systems Engineering Division, Engineering Sciences Division, Magnetic Fusion Engineering Division and Materials Fabrication Division.
Bandgap Engineering | Open Energy Information
Engineering Engineering Jump to: navigation, search Name Bandgap Engineering Place Woburn, Massachusetts Zip 1801 Sector Efficiency Product US-based company developing highly tunable and inexpensive methods for nano-structuring silicon and is applying these technologies to high efficiency photovoltaic systems and high capacity Li-ion batteries. References Bandgap Engineering[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Bandgap Engineering is a company located in Woburn, Massachusetts . References ↑ "Bandgap Engineering" Retrieved from "http://en.openei.org/w/index.php?title=Bandgap_Engineering&oldid=342515" Categories: Clean Energy Organizations
Nikon Instruments Inc. | Resource Center -Research Papers -New insights into DNA repair http://www.nikoninstruments.com/Resource-Center/Research-Papers/New-insights-into-DNA-repair[4/10/2012 10:42:30 AM
, such as exposure to UV light, other forms of radiation, and certain environmental chemicals. DNA repair processes was performed using an Eclipse TE2000-U inverted microscope with a total internal reflection fluorescence (TIRF
Kowalczykowski, Stephen C.
Optimal maintenance and repair policies in infrastructure management under uncertain facility deterioration rates: an adaptive control approach
1987. Optimal maintenance decisions for pavement management.maintenance and repair policies in infrastructure managementmanagement systems. In Section 3 we present AC formulations for the problem of ?nding optimal maintenance and
Madanat, S M; Durango, Pablo L
Role of Cell Cycle Regulation and MLH1, A Key DNA Mismatch Repair Protein, In Adaptive Survival Responses. Final Report
Due to several interesting findings on both adaptive survival responses (ASRs) and DNA mismatch repair (MMR), this grant was separated into two discrete Specific Aim sets (each with their own discrete hypotheses). The described experiments were simultaneously performed.
David A. Boothman
Low Dose Radiation Research Program: Checkpoint Responses and Repair of a
Checkpoint Responses and Repair of a Broken Chromosome in Budding Checkpoint Responses and Repair of a Broken Chromosome in Budding Yeast. Authors: André Walther, Mreshwar B. Vaze, Anna Malkova, Grzegorz Ira, Xuan Wang, Jung-Ae Kim, Neal Sugawara, James E. Haber Brandeis University, Waltham, Massachusetts We have studied how yeast cells respond to the creation of a single double-strand break (DSB) by using a site-specific endonuclease to create one (or more) DSBs. In collaboration with R. Schroff, M. Licheten and W. Bonner (NIH) we have shown that a single DSB rapidly becomes associated with histone H2AX-phosphorylation (y-H2AX) covering a distance of about 25 kb on either side of the DSB. The drop-off in phosphorylation is not attributable to specific boundary sequences. y-H2AX can be phosphorylated by either ATR (Mec1) or ATM (Tel1) protein kinases. A mutation that removes
Weld Repair of a Stamped Pressure Vessel in a Radiologically Controlled Zone
In September 2012 an ASME B&PVC Section VIII stamped pressure vessel located at the DOE Hanford Site Effluent Treatment Facility (ETF) developed a through-wall leak. The vessel, a steam/brine heat exchanger, operated in a radiologically controlled zone (by the CH2MHill PRC or CHPRC), had been in service for approximately 17 years. The heat exchanger is part of a single train evaporator process and its failure caused the entire system to be shut down, significantly impacting facility operations. This paper describes the activities associated with failure characterization, technical decision making/planning for repair by welding, logistical challenges associated with performing work in a radiologically controlled zone, performing the repair, and administrative considerations related to ASME code requirements.
Cannell, Gary L. [Fluor Enterprises, Inc.; Huth, Ralph J. [CH2MHill Plateau Remediation Company; Hallum, Randall T. [Fluor Government Group
Subterranean barriers, methods, and apparatuses for forming, inspecting, selectively heating, and repairing same
A subterranean barrier and method for forming same are disclosed, the barrier including a plurality of casing strings wherein at least one casing string of the plurality of casing strings may be affixed to at least another adjacent casing string of the plurality of casing strings through at least one weld, at least one adhesive joint, or both. A method and system for nondestructively inspecting a subterranean barrier is disclosed. For instance, a radiographic signal may be emitted from within a casing string toward an adjacent casing string and the radiographic signal may be detected from within the adjacent casing string. A method of repairing a barrier including removing at least a portion of a casing string and welding a repair element within the casing string is disclosed. A method of selectively heating at least one casing string forming at least a portion of a subterranean barrier is disclosed.
Nickelson, Reva A. (Shelley, ID); Sloan, Paul A. (Rigby, ID); Richardson, John G. (Idaho Falls, ID); Walsh, Stephanie (Idaho Falls, ID); Kostelnik, Kevin M. (Idaho, ID)
Standard practice for infrared flash thermography of composite panels and repair patches used in aerospace applications
1.1 This practice describes a procedure for detecting subsurface flaws in composite panels and repair patches using Flash Thermography (FT), in which an infrared (IR) camera is used to detect anomalous cooling behavior of a sample surface after it has been heated with a spatially uniform light pulse from a flash lamp array. 1.2 This practice describes established FT test methods that are currently used by industry, and have demonstrated utility in quality assurance of composite structures during post-manufacturing and in-service examinations. 1.3 This practice has utility for testing of polymer composite panels and repair patches containing, but not limited to, bismaleimide, epoxy, phenolic, poly(amide imide), polybenzimidazole, polyester (thermosetting and thermoplastic), poly(ether ether ketone), poly(ether imide), polyimide (thermosetting and thermoplastic), poly(phenylene sulfide), or polysulfone matrices; and alumina, aramid, boron, carbon, glass, quartz, or silicon carbide fibers. Typical as-fabricate...
American Society for Testing and Materials. Philadelphia
Low Dose Radiation Research Program: Genetic Control of Repair and Adaptive
Repair and Adaptive Responses to Low-level DNA Damage Repair and Adaptive Responses to Low-level DNA Damage James E. Haber Brandeis University Why This Project In order to fully understand mechanisms resulting in effects of low dose, whole system rather than cells must be examined. Although not identical to mammalian systems, simple systems usually have many similarities and give direction for further study of more complex systems. We use the budding yeast, Saccharomyces cerevisiae, as a model system because it is easy to manipulate and its genome is simple and well characterized. Project Goals Examine mechanisms and effects of low dose radiation response for: Genetic recombination mechanisms that lead to genomic instability Genetic factors that affect individual susceptibility to low-dose radiation The adaptive response
Gene Expression Pathways Activated and Repair of DNA of Double Strand
Pathways Activated and Repair of DNA of Double Strand Pathways Activated and Repair of DNA of Double Strand Breaks (DSBs) Following Low Dose Ionizing Radiation in Human Bronchial Epithelial Cells (HBECs) With and Without Defined Premalignant Oncogenic Changes John Minna University of Texas Southwestern Medical Center at Dallas Abstract We want to determine the effect of low dose ionizing radiation on the molecular progression of lung epithelial cells towards lung cancer. Our endpoints are focused on specific molecular and cellular changes known to be associated with lung cancer development and quantitating those changes as a function of low dose ionizing radiation. We use immortalized human bronchial epithelial cells (HBECs) developed from >40 individuals (including those from current, former, and never smokers, males, females,
Connections Between the TCR Proteins XPG and CSB, Repair of Oxidative DNA
Connections Between the TCR Proteins XPG and CSB, Repair of Oxidative DNA Connections Between the TCR Proteins XPG and CSB, Repair of Oxidative DNA Base Damage, and the Radio-Adaptive Response Helen Budworth, Brett Haltiwanger, Altaf Sarker, Torsten Grösser, Björn Rydberg, and Priscilla K. Cooper* Life Sciences Division, MailStop 74-157, Lawrence Berkeley National Laboratory, Berkeley, CA 94720; *Corresponding author A key question that is central to accurately assessing human health risks from environmentally relevant low level (low dose, low dose rate) exposures to ionizing radiation is whether cellular responses measured at the higher doses for which there are strong epidemiological health data and the high doses commonly used in laboratory experiments extrapolate in a linear fashion to low doses. Recent data suggest that they may not. For example, low-dose hypersensitivity for
A Key Step in Repairing DNA Double-Strand Breaks | Advanced Photon Source
X-ray Rainbow X-ray Rainbow An Insulating Breakthrough Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed A Key Step in Repairing DNA Double-Strand Breaks JANUARY 10, 2007 Bookmark and Share The atomic structure of the protein 53BP1 identified by Mayo researchers. (Courtesy: Mayo Clinic) A team of Mayo Clinic researchers has uncovered a key step in the molecular pathway of repairing DNA double-strand breaks. The studies were carried out using the 19-ID beamline (SBC-CAT) at the Advanced Photon Source (APS, Argonne) and the X12-C beamline at the National Synchrotron Light Source (NSLS, Brookhaven National Laboratory). Both the APS and the NSLS are funded by the U.S. Department of Energy's Office of Basic Energy
Vehicle Technologies Office: Advanced Combustion Engines
Advanced Combustion Advanced Combustion Engines to someone by E-mail Share Vehicle Technologies Office: Advanced Combustion Engines on Facebook Tweet about Vehicle Technologies Office: Advanced Combustion Engines on Twitter Bookmark Vehicle Technologies Office: Advanced Combustion Engines on Google Bookmark Vehicle Technologies Office: Advanced Combustion Engines on Delicious Rank Vehicle Technologies Office: Advanced Combustion Engines on Digg Find More places to share Vehicle Technologies Office: Advanced Combustion Engines on AddThis.com... Just the Basics Hybrid & Vehicle Systems Energy Storage Advanced Power Electronics & Electrical Machines Advanced Combustion Engines Combustion Engines Emission Control Waste Heat Recovery Fuels & Lubricants Materials Technologies Advanced Combustion Engines
To: Mansueti, Lawrence Subject: RE: Pepco Scheduled Line Repair Dec. 1-20, 2006
From: email@example.com [mailto:firstname.lastname@example.com] Sent: Monday, January 29, 2007 6:28 PM To: Mansueti, Lawrence Subject: RE: Pepco Scheduled Line Repair Dec. 1-20, 2006 Larry, Regarding the planned line outage, scheduled for Feb. 20 through Mar. 6, I am requesting that the residents near the plant be moved for the duration of the outage to protect their health. Would you include this comment also in the ongoing recorded discussion? Thank you. Elizabeth
Review of Weld Repair Options for Grade 91, Part 2: Damage Development and Distribution
This report reviews the likely creep damage distributions in weld repairs in Grade 91 steel. Information is provided in terms of the various weld metals that may be used, including nickel-based, matching P91 (B9), and standard P9 (B8) weld metals. The different damage distributions for each type, with associated implications for nondestructive evaluation, are discussed. In particular, the limitations of using surface ...
Turbine bearing failures in electric utilities can be responsible for outages resulting in significant lost generation time. In addition to bearing failures in the turbogenerators, failures may occur in other rotating equipment, such as pumps, fans, and auxiliary systems. Knowledge of bearing failure mechanisms and causes allows utilities to introduce safeguards into their occurrence and take faster remedial action. EPRI released the initial report, Manual of Bearing Failures and Repair in Power Plant Ro...
Precracked RC T-beams Repaired in Shear with Externally Bonded CFRP Sheets
, strengthening and repair of existing structures, advanced numerical analyses, glass fiber reinforced polymer pipelines and sustainable concrete. Chris Morley is a former Senior Lecturer in Concrete Structures at Cambridge University, UK. He has always been... effective since only a fairly short bonded length is available for force transfer. Another explanation could be that the �deeper� beams had more CFRP area bridging a shear crack compared to the �shallower� beams. Shear force-deflection relationship...
Dirar, Samir; Lees, Janet M.; Morley, Chris T.
Computer Based Training (CBT) Buried Pipe Condition Assessment and Repair, Version 1.0
The purpose of this training module is to provide an understanding of the inspection of buried piping. Course 1 of the course covers initial direct condition assessment of excavated buried pipe. Course 2 covers buried pipe coating repairs and final as-left inspections of piping. The CBT includes graphics, interactive features, and review questions to help the student better understand the subject. Windows XP, Vista, 7
Nondestructive Evaluation: Risk-Informed In-Service Repair and Replacement: Draft Methodology
Code Case N-660, Revision 0, "Risk-Informed Safety Classification for Use in Risk-Informed Repair/Replacement Activities," was published by ASME and was developed to expand the breadth of risk-informed Section XI requirements to pressure boundary components. This report provides a generic draft methodology and technical basis for revisions to N-660 for Class 2 and 3 systems based on lessons learned from pilot application to Arkansas Nuclear One (ANO), Unit 2.
A thrust generating engine utilizing cesium vapor as the propellant fuel is designed. The cesium is vaporized by heat and is passed through a heated porous tungsten electrode whereby each cesium atom is fonized. Upon emergfng from the tungsten electrode, the ions are accelerated rearwardly from the rocket through an electric field between the tungsten electrode and an adjacent accelerating electrode grid structure. To avoid creating a large negative charge on the space craft as a result of the expulsion of the positive ions, a source of electrons is disposed adjacent the ion stream to neutralize the cesium atoms following acceleration thereof. (AEC)
Ehlers, K.W.; Voelker, F. III
Acoustical heat pumping engine
The disclosure is directed to an acoustical heat pumping engine without moving seals. A tubular housing holds a compressible fluid capable of supporting an acoustical standing wave. An acoustical driver is disposed at one end of the housing and the other end is capped. A second thermodynamic medium is disposed in the housing near to but spaced from the capped end. Heat is pumped along the second thermodynamic medium toward the capped end as a consequence both of the pressure oscillation due to the driver and imperfect thermal contact between the fluid and the second thermodynamic medium. 2 figs.
Materials science and engineering
During FY-96, work within the Materials Science and Engineering Thrust Area was focused on material modeling. Our motivation for this work is to develop the capability to study the structural response of materials as well as material processing. These capabilities have been applied to a broad range of problems, in support of many programs at Lawrence Livermore National Laboratory. These studies are described in (1) Strength and Fracture Toughness of Material Interfaces; (2) Damage Evolution in Fiber Composite Materials; (3) Flashlamp Envelope Optical Properties and Failure Analysis; (4) Synthesis and Processing of Nanocrystalline Hydroxyapatite; and (5) Room Temperature Creep Compliance of Bulk Kel-E.
Lesuer, D.R.
The disclosure is directed to an acoustical heat pumping engine without moving seals. A tubular housing holds a compressible fluid capable of supporting an acoustical standing wave. An acoustical driver is disposed at one end of the housing and the other end is capped. A second thermodynamic medium is disposed in the housing near to but spaced from the capped end. Heat is pumped along the second thermodynamic medium toward the capped end as a consequence both of the pressure oscillation due to the driver and imperfect thermal contact between the fluid and the second thermodynamic medium.
Engineering | National Nuclear Security Administration
Engineering | National Nuclear Security Administration Engineering | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Engineering Home > About Us > Our Programs > Defense Programs > Future Science & Technology Programs > Engineering Engineering NNSA uses modern tools and capabilities in the engineering sciences field which are needed to ensure the safety, security, reliability and
Just the Basics: Diesel Engine
Today's direct-injection diesel Today's direct-injection diesel engines are more rugged, powerful, durable, and reliable than gasoline engines, and use fuel much more efficiently, as well. Diesel Engines Yesterday, Today, and Tomorrow Diesels are workhorse engines. That's why you find them powering heavy- duty trucks, buses, tractors, and trains, not to mention large ships, bulldozers, cranes, and other construction equipment. In the past, diesels fit the stereotype of muscle-bound behe- moths. They were dirty and sluggish, smelly and loud. That image doesn't apply to today's diesel engines, however, and tomorrow's diesels will show even greater improvements. They will be even more fuel efficient, more flexible in the fuels they can use, and also much cleaner in emissions. How Diesel Engines Work
DNA repair in mammalian cells exposed to combinations of carcinogenic agents. [uv radiation; AAAF; 4-NQO; DMBA-epoxide; ICR-170
Cells defective in one or more aspects of repair are killed and often mutagenized more readily than normal cells by DNA damaging agents, and humans whose cells are deficient in repair are at an increased carcinogenic risk compared to normal individuals. The excision repair of uv induced pyrimidine dimers is a well studied system, but the details of the steps in this repair system are far from being understood in human cells. We know that there are a number of chemicals that mimic uv in that normal human cells repair DNA damage from both these agents and from uv by a long patch excision repair system, and that xeroderma pigmentosum cells defective in repair of uv are also defective in the repair of damage from these chemicals. The chemicals we have investigated are AAAF, 4-NQO, DMBA-epoxide, and ICR-170. We describe experiments, using several techniques, in which DNA excision repair is measured after treatment of various human cell strains with combinations of uv and these agents. If two agents have a common rate limiting step then, at doses high enough to saturate the repair system, one would expect the observed repair after a treatment with a combination of agents to be equal to that from one agent alone. Such is not the case for normal human or excision-deficient XP cells. In the former repair is additive and in the latter repair is usually appreciably less than that observed with either agent alone. Models that attempt to explain these surprising results involve complexes of enzymes and cofactors.
Setlow, R.B.; Ahmed, F.E.
The smallest possible heat engines
We construct the smallest possible self contained heat engines; one composed of only two qubits, the other of only a single qutrit. The engines are self-contained as they do not require external sources of work and/or control. They are able to produce work which is used to continuously lift a weight. Despite the dimension of the engine being small, it is still able to operate at the Carnot efficiency.
Noah Linden; Sandu Popescu; Paul Skrzypczyk
High temperature turbine engine structure
A high temperature ceramic/metallic turbine engine includes a metallic housing which journals a rotor member of the turbine engine. A ceramic disk-like shroud portion of the engine is supported on the metallic housing portion and maintains a close running clearance with the rotor member. A ceramic spacer assembly maintains the close running clearance of the shroud portion and rotor member despite differential thermal movements between the shroud portion and metallic housing portion.
Carruthers, William D. (Mesa, AZ); Boyd, Gary L. (Tempe, AZ)
Steam Turbine Performance Engineer's Guide
The Steam Turbine Performance Engineer's Guide is meant to present the steam turbine performance engineer with the expected and important functions and responsibilities necessary to succeed in this position that are not necessarily taught in college. The instructions and recommendations in this guide, when properly executed, will improve the effectiveness of steam turbine performance engineers, positively affecting both the performance and reliability of the steam turbines under their care.
Mechanical Engineering Department Technical Review
The Mechanical Engineering Department Technical Review is published to inform readers of various technical activities within the Department, promote exchange of ideas, and give credit to personnel who are achieving the results. The report is presented in two parts: technical achievements and publication abstracts. The first is divided into seven sections, each of which reports on an engineering division and its specific activities related to nuclear tests, nuclear explosives, weapons, energy systems, engineering sciences, magnetic fusion, and materials fabrication.
Carr, R.B.; Denney, R.M. (eds.)
Quality engineering as a profession.
Over the course of time, the profession of quality engineering has witnessed significant change, from its original emphasis on quality control and inspection to a more contemporary focus on upholding quality processes throughout the organization and its product realization activities. This paper describes the profession of quality engineering, exploring how today's quality engineers and quality professionals are certified individuals committed to upholding quality processes and principles while working with different dimensions of product development. It also discusses the future of the quality engineering profession and the future of the quality movement as a whole.
Kolb, Rachel R.; Hoover, Marcey L.
Systems Engineering Advancement Research Initiative
strategic partners Define and research fundamental concepts for advanced system engineering Contribute materials, and handbooks to inspire, inform, and guide students and practitioners VENUE SEAri is located
de Weck, Olivier L.
Materials Engineer Unravels Mutation Mystery
Aug 31, 2010 ... Just ask Kalina Hristova, an associate professor of materials science and engineering at Johns Hopkins University, who has spent more than�...
Recycling of Engine Serviced Superalloys
of gas turbine engines and other high temperature applications. Elements such ... processes and tight controls have limited the use of large amounts of available.
Computational methods in structural engineering.
???The present research is focused on computational methods in structural engineering. The main work includes three parts: 1) the development of cubic B-spline finite elements� (more)
Yang, Hao (??)
Engineering and Technology Research & Development
Wang, Xiaoxing Wang July 09, 2012 Copyright 2012 RTI. All rights reserved Center for Energy Technology 2012 NETL CO 2 Capture Technology Meeting Engineering and Technology...
Argonne Chemical Sciences & Engineering - Publications
and Fuel Cell Materials Ceramic Electrochemistry lithium-ion battery Electrochemical Energy Storage Basic Research Applied R&D Engineering Electrochemical Analysis and...
Development of Alternative Engine Materials
ature strength(31,32), and reinforced rings are envisioned in various IHPTET engine tests. The development of r-based materials with a balance of properties.
Engineered refractories for slagging gasifiers
Successful field trials in commercial slagging gasifier systems have been made of improved refractory materials engineered specifically for longer service life in this application.
Kwong, Kyei-sing; Bennett, James P.; Krabbe, Rick; Thomas, Hugh; Powell, Cynthia A.
Engineering performance of Bringelly shale.
??SYNOPSIS This thesis is concerned with the general and fundamental engineering characterisation of a geological formation within Wianamatta group, known as Bringelly shale. Bringelly shale� (more)
William, Ezzat
SEAMOPT - Stirling engine optimization code
Experience is described with use of a fast-running Stirling engine optimization code developed at Argonne intended for public release. Stirling engine modeling is provided by the SEAM1 thermodynamic code. An interface was written to combine SEAM1 with a general optimization code and assess maximum component stress levels. Thus full engine thermodynamic and structural simulation is done during the optimization process. Several examples of the use of this code to optimize the GPU-3 engine are described. In one case efficiency was improved by over 25%.
Heames, T.J.; Daley, J.G.
Biomass Engineering Prize Competition Announced
Posted on: 7/30/2010 12:00:00 AM... The DownEast 2010 Biomass Engineering Prize Competition is seeking innovative solutions focused on revitalizing an�...
JOINT ELECTRICAL & COMPUTER ENGINEERING AND PHYSICS COLLOQUIUM "Speckle Statistics, Coherence confirmation of the increase in the well- defined polarization state of the output radiation. In the joint
Engineering Biofuels from Photosynthetic Bacteria
interdisciplinary target molecule selection and testing ... Engineering Biofuels from Photosynthetic Bacteria (IN 09001) November 2012 tdc_es_in09001_1112_mn
Engineered Infills for Concrete Barriers
... INEEL Idaho National Engineering and Environmental Laboratory ... a 240 MW thermal sodium�cooled, graphite ... for cement based waste forms which ...
Alternative Energy Engineering Activity (Minnesota)
This statute establishes an alternative energy engineering activity to provide on-site technical assistance for alternative energy and conservation projects; develop information materials and...
Engine Combustion & Efficiency - FEERC
Engine Combustion & Efficiency Engine Combustion & Efficiency ORNL currently and historically supports the U.S. DOE on multi-cylinder and vehicle applications of diesel combustion, lean burn gasoline combustion, and low temperature combustion processes, and performs principal research on efficiency enabling technologies including emission controls, thermal energy recovery, and bio-renewable fuels. Research areas span from fundamental concepts to engine/vehicle integration and demonstration with a particular emphasis on the following areas: Thermodynamics for identifying and characterizing efficiency opportunities for engine-systems as well as the development of non-conventional combustion concepts for reducing fundamental combustion losses. Nonlinear sciences for improving the physical understanding and
Kevin E. Lansey Department of Civil Engineering and Engineering Mechanics
significant publications Lansey, K. and P. Boulos, Comprehensive Handbook on Water Quality Analysis Distribution Systems Analysis Handbook for Engineers and Planners, MW Soft, Inc., 2nd edition, 2006. Lansey, K for Water Distribution Pipe Network Models," ASCE Journal of Hydraulic Engineering, 127(4), April, 2001, pp
Scott, Christopher
US Army Corps of Engineers Engineer Research and Development Center
Energy Star or FEMP designated products #12;8 US Army Corps of Engineers® Engineer Research.5% or more in 2013 and beyond (DoD Internal Guidance is 25% by 2025) Energy Efficient Products Install · Renewable, Renewable, Renewable · Net Zero Energy Energy Efficiency (Conservation) Energy Production
This Final Technical Report discusses the progress was made on the experimental and numerical tasks over the duration of this project regarding a new technique for decreasing engine friction and wear via liner rotation. The experimental subtasks involved quantifying the reduction in engine friction for a prototype rotating liner engine relative to a comparable baseline engine. Both engine were single cylinder conversions of nominally identical production four-cylinder engines. Hot motoring tests were conducted initially and revealed that liner rotation decreased engine friction by 20% under motoring conditions. A well-established model was used to estimate that liner rotation should decrease the friction of a four-cylinder engine by 40% under hot motoring conditions. Hot motoring tear-down tests revealed that the crankshaft and valve train frictional losses were essentially the same for the two engines, as expected. However, the rotating liner engine had much lower (>70%) piston assembly friction compared to the conventional engine. Finally, we used the Instantaneous IMEP method to compare the crank-angle resolved piston assembly friction for the two engines. Under hot motoring conditions, these measurements revealed a significant reduction in piston assembly friction, especially in the vicinity of compression TDC when the lubrication regime transitions from hydrodynamic through mixed and into boundary friction. We have some remaining problems with these measurements that we expect to solve during the next few weeks. We will then perform these measurements under firing conditions. We also proposed to improve the state-of-the-art of numerical modeling of piston assembly friction for conventional engines and then to extend this model to rotating liner engines. Our research team first modeled a single ring in the Purdue ring-liner test rig. Our model showed good agreement with the test rig data for a range of speeds and loads. We then modeled a complete piston assembly in an engine. The model appears to produce the correct behavior, but we cannot quantify its strengths or weaknesses until our crank-angle-resolved measurements have been completed. Finally, we proposed and implemented a model for the effects of liner rotation on piston assembly friction. Here, we propose that the rotating liner design is analogous to the shaft-bushing mechanism. Therefore, we used the side-slip rolling friction model to simulate the effects of liner rotation. This model appears to be promising, but final analysis of its strengths and/or weaknesses must await our crank-angle-resolved measurements.
Ron Matthews
Upper extremity pain and computer use among engineering graduate students
by Computer Science and Electrical Engineering graduatethe Computer Science and Electrical Engineering Departmentof 206 Electrical Engineering and Computer Science graduate
Schlossberg, E B; Morrow, S; Llosa, A E; Mamary, E; Dietrich, P; Rempel, D M
of materials, and energy storage and conversion. Ju obtained a PhD degree in nuclear engineering from MIT Nuclear Engineering & Radiological Sciences And Materials Science & Engineering Present the First Annual of Nuclear Science and Engineering Department of Materials Science and Engineering "Plumber's Wonderland
Lin, Zhiqun
Texas Tech University's New Petroleum Engineering Building
Texas Tech University's New Petroleum Engineering Building: A New Era in Petroleum Engineering Production and Operations Education Summer 2012 Engineering Our Future Texas Tech University - Edward E. Whitacre Jr. College of Engineering Texas Tech Makes Progress to Tier One Five Distinguished Engineers
Exciting youth about science and engineering : the Stirling Engine class; Stirling Engine class.
??The problem of a lack of science and engineering opportunities for youth has been identified. While other programs and attempted solutions exist, a novel approach� (more)
Barrag�n, Patrick R
Turbocharged engine operations using knock resistant fuel blends for engine efficiency improvements
Engine downsizing with a turbocharger has become popular these days in automotive industries. Downsizing the engine lets the engine operate in a more efficient region, and the engine boosting compensates for the power loss ...
Jo, Young Suk
Optimal Infrastructure System Maintenance and Repair Policies with Random Deterioration Model Parameters
Deterioration,� Journal of Infrastructure System , ASCE,Maintenance Policies for Infrastructure Networks,� Computer-Aided Civil and Infrastructure Engineering , Vol. 15, No. 1,
Park, Sejung
?' $ 5 . . 7 pi -ON RESEARCH AND ENGINEERING COMPANY CLINTON TOWNSHIP, ROUTE 22 EAST, ANNANDALE, NEW iERSEY 08801 July 18, 1988 Mr. Ken Wills Weston/OTS 20030 Century Blvd Suite 301 Germantown, MD 20874 Dear Ken, Per our conversation on July 11, 1988, enclosed is a current plot plan of the Linden Technology Center (old Standard Oil Development Company site). I hope this satisfies your in- formation needs regarding the study you are doing concerning AEC contractor sites. We believe we have provided Mr. Charles young with all the information he required. If you have further questions, please call me at (2011 730-3053. Very truly yours, I Paul C. Bucknam PCB:bam Enclosure 07188Ol.pcb LINDEN TECHNOLOGY CENTER. LINDEN, N.J. VISITORS PARKING PLAN YOU ARE HERE WE HOPE YOUR VISIT WILL BE PRODUCTIVE AND SAFE
Image Content Engine (ICE)
The Image Content Engine (ICE) is being developed to provide cueing assistance to human image analysts faced with increasingly large and intractable amounts of image data. The ICE architecture includes user configurable feature extraction pipelines which produce intermediate feature vector and match surface files which can then be accessed by interactive relational queries. Application of the feature extraction algorithms to large collections of images may be extremely time consuming and is launched as a batch job on a Linux cluster. The query interface accesses only the intermediate files and returns candidate hits nearly instantaneously. Queries may be posed for individual objects or collections. The query interface prompts the user for feedback, and applies relevance feedback algorithms to revise the feature vector weighting and focus on relevant search results. Examples of feature extraction and both model-based and search-by-example queries are presented.
Brase, J M
Inorganic polymer engineering materials
Phosphazene-based, inorganic-polymer composites have been produced and evaluated as potential engineering materials. The thermal, chemical, and mechanical properties of several different composites made from one polymer formulation have been measured. Measured properties are very good, and the composites show excellent promise for structural applications in harsh environments. Chopped fiberglass, mineral, cellulose, and woodflour filled composites were tested. Chopped fiberglass filled composites showed the best overall properties. The phosphazene composites are very hard and rigid. They have low dielectric constants and typical linear thermal expansion coefficients for polymers. In most cases, the phosphazene materials performed as well or better than analogous, commercially available, filled phenolic composites. After 3 to 5 weeks of exposure, both the phosphazene and phenolics were degraded to aqueous bases and acids. The glass filled phosphazene samples were least affected.
Stone, M.L.
Wind Engineering & Natural Disaster Mitigation
Wind Engineering & Natural Disaster Mitigation For more than 45 years, Western University has been internationally recognized as the leading university for wind engineering and wind- related research. Its of environmental disaster mitigation, with specific strengths in wind and earthquake research. Boundary Layer Wind
Civil & Environmental Engineering Student Handbook
1 Civil & Environmental Engineering Student Handbook Fall 2013/Spring 2014 WELCOME Welcome to the Department of Civil and Environmental Engineering. The intent of this Handbook is to introduce you to the Department, the faculty, and the undergraduate programs and activities. This Handbook also provides details
Massachusetts at Amherst, University of
Chemical Engineering and Materials Science
from vegetable oil. Earn a degree in chemical engineering, and you could enjoy a career working to commercialize new ideas, technologies and products. Students learn to solve problems and bring inventions through tissue engineering of large vessels and heart valves, or inventing clean-burning alternative fuel
Engineering and design Taught degrees
in Mechanical Engineering MSc in Satellite Communication Systems MSc in Sustainable Energy Technology Research, mathematics, physics or an applied science. Also refer to Applicant profile, listed with relevant course in Mechanical Engineering, the MSc in Sustainable Energy Technology or a research degree, we must receive your
Sussex, University of
Stirling engine with pressurized crankcase
A two piston Stirling engine wherein the pistons are coupled to a common crankshaft via bearing means, the pistons include pad means to minimize friction between the pistons and the cylinders during reciprocation of the pistons, means for pressurizing the engine crankcase, and means for cooling the crankshaft and the bearing means eliminating the need for oil in the crankcase.
Corey, John A. (Melrose, NY)
Vanderbilt Department of Mechanical Engineering
C A T I O N Stirling engine design #12;27 "I'm not the same person I was one-and-a-half years ago. I display Stirling engine components. Front - Eric Clarke, l to r- Dan Cordon, Nathaniel Allen, Dan Gerbus
Simaan, Nabil
EMC Engineers | Open Energy Information
EMC Engineers EMC Engineers Jump to: navigation, search Logo: EMC Engineers Name EMC Engineers Address 143 Union Blvd Suite 350 Place Lakewood, Colorado Zip 80228 Sector Efficiency Product Energy Engineering Year founded 1976 Number of employees 51-200 Phone number 303-974-1200 Website http://www.emcengineers.com/ Coordinates 39.716798°, -105.134352° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.716798,"lon":-105.134352,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}
HCCI Engine Optimization and Control
The goal of this project was to develop methods to optimize and control Homogeneous-Charge Compression Ignition (HCCI) engines, with emphasis on diesel-fueled engines. HCCI offers the potential of nearly eliminating IC engine NOx and particulate emissions at reduced cost over Compression Ignition Direct Injection engines (CIDI) by controlling pollutant emissions in-cylinder. The project was initiated in January, 2002, and the present report is the final report for work conducted on the project through December 31, 2004. Periodic progress has also been reported at bi-annual working group meetings held at USCAR, Detroit, MI, and at the Sandia National Laboratories. Copies of these presentation materials are available on CD-ROM, as distributed by the Sandia National Labs. In addition, progress has been documented in DOE Advanced Combustion Engine R&D Annual Progress Reports for FY 2002, 2003 and 2004. These reports are included as the Appendices in this Final report.
Rolf D. Reitz
APS Research Fuels Engineering Interest
5th, 2003 5th, 2003 APS Research Fuels Engineering Interest Award-winning research on the characteristics of fuel sprays from injectors is one of the featured articles in the May 2003 issue of Mechanical Engineering and on the Web site of that magazine. The studies, carried out at APS's X-ray Operation and Research beamline 1-BM and the Cornell High Energy Synchrotron Source, revealed startling new information about fuel sprays, including the presence of a shockwave as the spray leaves the injector nozzle. Entitled "Penetrating Vision," the article in Mechanical Engineering, by associate editor John DeGaspari, notes that "an investigative technique using x-rays is causing engine designers to sit up and take notice." In the article, Scott Parrish, General Motors R&D senior research engineer, notes
Engineering and Support Center, Huntsville Engineering and Support Center, Huntsville FUPWG Oct 20-21, 2010 Margaret Simmons U.S. Army Corps of Engineers Huntsville Center (256) 895-1101 firstname.lastname@example.com Disclaimer: The views expressed in this presentation are those of the author and do not represent the views of the Army or the Army Corps of Engineers. US Army Engineering and Support Center, Huntsville * DEMOLISHED BUILDINGS - Contract provides that adjustments can be made for changes in building usage and building occupancy - but doesn't contain the process to make the adjustment - Building is demolished so NO ENERGY is being consumed - however this is not due to the ESPC project - Should the contractor be given credit? Contracts allows for adjustment so yes. However, since building is gone, contractor
Materials - Catalysts for Diesel Engines
Argonne's deNOx Catalyst Begins Extensive Diesel Engine Exhaust Testing Argonne's deNOx Catalyst Begins Extensive Diesel Engine Exhaust Testing denox monolith Argonne's deNOx catalyst can be prepared as a powder or a monolith. chris marshall Principal investigator Chris Marshall shows the monolith form of the Argonne deNOx catalyst with a sensor inserted for testing. doug longman Mechanical engineer Doug Longman inserts the instrumented deNOx catalyst monolith into the aftertreatment chamber of Argonne's heavy-duty Caterpillar diesel test engine. Background Diesel engines, while efficient, produce many undesirable combustion byproducts in their exhaust. While we tend to think of the sooty exhaust products we see as the bad stuff, it is the less-visible exhaust products such as nitrogen oxides (NOx) that create bigger problems.
CHEN 3600 Computer-Aided Chemical Engineering Chemical Engineering Department Notes 4
CHEN 3600 Computer-Aided Chemical Engineering Chemical Engineering Department Notes 4 EWE-Aided Chemical Engineering Chemical Engineering Department Notes 4 EWE: "Engineering With Excel" Larsen Page 2 will be added using "cutting and pasting". #12;CHEN 3600 Computer-Aided Chemical Engineering Chemical
Clement, Prabhakar
SEE: a Search Engine for Search Engines Hyun-Woo Kim
SEE: a Search Engine for Search Engines Hyun-Woo Kim College of Information Sciences and Technology describe the way how I developed a new kind of search engine named SEE, a search engine for search engines, which could be used for finding other relevant search engines retrieving its own databases, which
Argonne Chemical Sciences & Engineering - People - Catalysis...
Fuel Cell Engineering Shabbir Ahmed, Chemical Engineer and Group Leader phone: 630252-4553, fax: 630972-4553, firstname.lastname@example.com Ph.D., Chemical Engineering, University of Nebraska...
Visualization & Engineering Design Graphics with Augmented Reality
Visualization and Engineering Design Graphics with Augmented Reality is designed as a learning tool to help the aspiring engineer learn the language of engineering graphics. In this regard, this book is hardly unique, as there have been literally hundreds ...
Jorge Dorribo Camba, Jeffrey Otey, Manuel Contero, Mariano Alcaniz
Heavy Vehicle and Engine Resource Guide
The Heavy Vehicle and Engine Resource Guide is a catalog of medium- and heavy-duty engines and vehicles with alternative fuel and advanced powertrain options. This edition covers model year 2003 engines and vehicles.
The Commonwealth's Leading College of Engineering
systems for far-field acoustics; particle image velocimetry; surface microphones for pressure measurement and Ocean Engineering....................540-231-6611 Biological Systems Engineering .......................................540-231-6555 Engineering Science and Mechanics .................540-231-6651 Industrial and Systems
Virginia Tech
Chapter 48 - Value Engineering | Department of Energy
are here Home Chapter 48 - Value Engineering Chapter 48 - Value Engineering 48ValueEngineering0.pdf More Documents & Publications CHAPTER 3 Audit Report: OAS-L-07-08...
Hybrid simulation of a free piston engine
The free piston engine principle is one which has intrigued mechanical engineers for decades. Indeed, the original gas engine of Otto and Langden employed a piston assembly which did not contain the now conventional connecting rod and camshaft arrangement ...
R. E. Gagne; E. J. Wright
SunShot Initiative: Dish Engine
Dish Engine to someone by E-mail Dish Engine to someone by E-mail Share SunShot Initiative: Dish Engine on Facebook Tweet about SunShot Initiative: Dish Engine on Twitter Bookmark SunShot Initiative: Dish Engine on Google Bookmark SunShot Initiative: Dish Engine on Delicious Rank SunShot Initiative: Dish Engine on Digg Find More places to share SunShot Initiative: Dish Engine on AddThis.com... Concentrating Solar Power Systems Parabolic Trough Linear Fresnel Power Tower Dish Engine Components Competitive Awards Staff Photovoltaics Systems Integration Balance of Systems Dish Engine DOE funds solar research and development (R&D) in dish/engine systems as one of four concentrating solar power (CSP) technologies aiming to meet the goals of the SunShot Initiative. CSP dish engines, which provide high solar
Involvement of DNA polymerase beta in repairing oxidative damages induced by antitumor drug adriamycin
Adriamycin (ADM) is a widely used antineoplastic drug. However, the increasing cellular resistance has become a serious limitation to ADM clinical application. The most important mechanism related to ADM-induced cell death is oxidative DNA damage mediated by reactive oxygen species (ROS). Base excision repair (BER) is a major pathway in the repair of DNA single strand break (SSB) and oxidized base. In this study, we firstly applied the murine embryo fibroblasts wild-type (pol {beta} +/+) and homozygous pol {beta} null cell (pol {beta} -/-) as a model to investigate ADM DNA-damaging effects and the molecular basis underlying these effects. Here, cellular sensitivity to ADM was examined using colorimetric assay and colony forming assay. ADM-induced cellular ROS level and the alteration of superoxide dismutase (SOD) activity were measured by commercial kits. Further, DNA strand break, chromosomal damage and gene mutation were assessed by comet assay, micronucleus test and hprt gene mutation assay, respectively. The results showed that pol {beta} -/- cells were more sensitive to ADM compared with pol {beta} +/+ cells and more severe SSB and chromosomal damage as well as higher hprt gene mutation frequency were observed in pol {beta} -/- cells. ROS level in pol {beta} -/- cells increased along with decreased activity of SOD. These results demonstrated that pol {beta} deficiency could enable ROS accumulation with SOD activity decrease, further elevate oxidative DNA damage, and subsequently result in SSB, chromosome cleavage as well as gene mutation, which may be partly responsible for the cytotoxicity of ADM and the hypersensitivity of pol {beta} -/- cells to ADM. These findings suggested that pol {beta} is vital for repairing oxidative damage induced by ADM.
Liu Shukun; Wu Mei [Department of Environmental Health, Sichuan University, West China School of Public Health, Chengdu (China); Zhang Zunzhen, E-mail: email@example.com [Department of Environmental Health, Sichuan University, West China School of Public Health, Chengdu (China)
Development and validation of nondestructive inspection techniques for composite doubler repairs on commercial aircraft
Composite doublers, or repair patches, provide an innovative repair technique which can enhance the way aircraft are maintained. Instead of riveting multiple steel or aluminum plates to facilitate an aircraft repair, it is possible to bond a single boron-epoxy composite doubler to the damaged structure. In order for the use of composite doublers to achieve widespread use in the civil aviation industry, it is imperative that methods be developed which can quickly and reliably assess the integrity of the doubler. In this study, a specific composite application was chosen on an L-1011 aircraft in order to focus the tasks on application and operation issues. Primary among inspection requirements for these doublers is the identification of disbonds, between the composite laminate and aluminum parent material, and delaminations in the composite laminate. Surveillance of cracks or corrosion in the parent aluminum material beneath the doubler is also a concern. No single nondestructive inspection (NDI) method can inspect for every flaw type, therefore it is important to be aware of available NDI techniques and to properly address their capabilities and limitations. A series of NDI tests were conducted on laboratory test structures and on full-scale aircraft fuselage sections. Specific challenges, unique to bonded composite doubler applications, were highlighted. An array of conventional and advanced NDI techniques were evaluated. Flaw detection sensitivity studies were conducted on applicable eddy current, ultrasonic, X-ray and thermography based devices. The application of these NDI techniques to composite doublers and the results from test specimens, which were loaded to provide a changing flaw profile, are presented in this report. It was found that a team of these techniques can identify flaws in composite doubler installations well before they reach critical size.
Roach, D.; Walkington, P.
DNA Repair Biomarkers Predict Response to Neoadjuvant Chemoradiotherapy in Esophageal Cancer
Purpose: The addition of neoadjuvant chemoradiotherapy prior to surgical resection for esophageal cancer has improved clinical outcomes in some trials. Pathologic complete response (pCR) following neoadjuvant therapy is associated with better clinical outcome in these patients, but only 22% to 40% of patients achieve pCR. Because both chemotherapy and radiotherapy act by inducing DNA damage, we analyzed proteins selected from multiple DNA repair pathways, using quantitative immunohistochemistry coupled with a digital pathology platform, as possible biomarkers of treatment response and clinical outcome. Methods and Materials: We identified 79 patients diagnosed with esophageal cancer between October 1994 and September 2002, with biopsy tissue available, who underwent neoadjuvant chemoradiotherapy prior to surgery at the Massachusetts General Hospital and used their archived, formalin-fixed, paraffin-embedded biopsy samples to create tissue microarrays (TMA). TMA sections were stained using antibodies against proteins in various DNA repair pathways including XPF, FANCD2, PAR, MLH1, PARP1, and phosphorylated MAPKAP kinase 2 (pMK2). Stained TMA slides were evaluated using machine-based image analysis, and scoring incorporated both the intensity and the quantity of positive tumor nuclei. Biomarker scores and clinical data were assessed for correlations with clinical outcome. Results: Higher scores for MLH1 (p = 0.018) and lower scores for FANCD2 (p = 0.037) were associated with pathologic response to neoadjuvant chemoradiation on multivariable analysis. Staining of MLH1, PARP1, XPF, and PAR was associated with recurrence-free survival, and staining of PARP1 and FANCD2 was associated with overall survival on multivariable analysis. Conclusions: DNA repair proteins analyzed by immunohistochemistry may be useful as predictive markers for response to neoadjuvant chemoradiotherapy in patients with esophageal cancer. These results are hypothesis generating and need confirmation in an independent data set.
Alexander, Brian M., E-mail: email@example.com [Department of Radiation Oncology, Dana-Farber/Brigham and Women's Cancer Center, Boston, Massachusetts (United States); Wang Xiaozhe [On-Q-ity, Inc., Waltham, Massachusetts (United States); Niemierko, Andrzej [Department of Radiation Oncology, Massachusetts General Hospital, Boston, Massachusetts (United States); Weaver, David T. [On-Q-ity, Inc., Waltham, Massachusetts (United States); Mak, Raymond H. [Department of Radiation Oncology, Dana-Farber/Brigham and Women's Cancer Center, Boston, Massachusetts (United States); Roof, Kevin S. [Southeast Radiation Oncology, Charlotte, North Carolina (United States); Fidias, Panagiotis [Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts (United States); Wain, John [Department of Surgery, Massachusetts General Hospital, Boston, Massachusetts (United States); Choi, Noah C. [Department of Radiation Oncology, Massachusetts General Hospital, Boston, Massachusetts (United States)
Suberoylanilide Hydroxyamic Acid Modification of Chromatin Architecture Affects DNA Break Formation and Repair
Purpose: Chromatin-modifying compounds that inhibit the activity of histone deacetylases have shown potency as radiosensitizers, but the action of these drugs at a molecular level is not clear. Here we investigated the effect of suberoylanilide hydroxyamic acid (SAHA) on DNA breaks and their repair and induction of rearrangements. Methods and Materials: The effect of SAHA on both clonogenic survival and repair was assessed using cell lines SCC-25, MCF7, and TK6. In order to study unique DNA double-strand breaks, anti-CD95 antibody was employed to introduce a DNA double-strand break at a known location within the 11q23 region. The effects of SAHA on DNA cleavage and rearrangements were analyzed by ligation-mediated PCR and inverse PCR, respectively. Results: SAHA acts as radiosensitizer at 1 {mu}M, with dose enhancement factors (DEFs) at 10% survival of: SCC-25 - 1.24 +- 0.05; MCF7 - 1.16 +- 0.09 and TK6 - 1.17 +- 0.05, and it reduced the capacity of SCC-25 cells to repair radiation induced lesions. Additionally, SAHA treatment diffused site-specific fragmentation over at least 1 kbp in TK6 cells. Chromosomal rearrangements produced in TK6 cells exposed to SAHA showed a reduction in microhomology at the breakpoint between 11q23 and partner chromosomes. Conclusions: SAHA shows efficacy as a radiosensitizer at clinically obtainable levels. In its presence, targeted DNA strand breaks occur over an expanded region, indicating increased chromatin access. The rejoining of such breaks is degraded by SAHA when measured as rearrangements at the molecular level and rejoining that contributes to cell survival.
Singh, Sheetal; Le Hongan; Shih, S.-J.; Ho, Bay [Department of Radiation Oncology, University of California at Davis, 4501 X St., Sacramento, California 95817 (United States); Vaughan, Andrew T., E-mail: firstname.lastname@example.com [Department of Radiation Oncology, University of California at Davis, 4501 X St., Sacramento, California 95817 (United States); Department of Veterans Affairs, Mather, California 95655 (United States)
Inhibition of homologous recombination repair in irradiated tumor cells pretreated with Hsp90 inhibitor 17-allylamino-17-demethoxygeldanamycin
In order to investigate the mechanism of radio-sensitization by an Hsp90 inhibitor 17-allylamino-17-demethoxygeldanamycin (17-AAG), we studied repair of DNA double strand breaks (DSBs) in irradiated human cells pre-treated with 17-AAG. DSBs are thought to be the critical target for radiation-induced cell death. Two human tumor cell lines DU145 and SQ-5 which showed clear radio-sensitization by 17-AAG revealed a significant inhibition of DSB repair, while normal human cells which did not show radio-sensitization by the drug indicated no change in the DSB repair kinetics with 17-AAG. We further demonstrated that BRCA2 was a novel client protein for Hsp90, and 17-AAG caused the degradation of BRCA2 and in turn altered the behavior of Rad51, a critical protein for homologous recombination (HR) pathway of DSB repair. Our data demonstrate for the first time that 17-AAG inhibits the HR repair process and could provide a new therapeutic strategy to selectively result in higher tumor cell killing.
Noguchi, Miho [Graduate School of Science and Technology, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522 (Japan); Heavy-Ion Radiobiology Research Group, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage-ku, Chiba 263-8555 (Japan); Yu, Dong [Heavy-Ion Radiobiology Research Group, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage-ku, Chiba 263-8555 (Japan); Hirayama, Ryoichi [Heavy-Ion Radiobiology Research Group, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage-ku, Chiba 263-8555 (Japan); Ninomiya, Yasuharu [Heavy-Ion Radiobiology Research Group, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage-ku, Chiba 263-8555 (Japan); Sekine, Emiko [Heavy-Ion Radiobiology Research Group, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage-ku, Chiba 263-8555 (Japan); Kubota, Nobuo [Department of Radiological Sciences, Ibaraki Prefectural University of Health Sciences, 4669-2 Ami, Ami-machi, Inashiki-gun, Ibaraki 300-0394 (Japan); Ando, Koichi [Graduate School of Science and Technology, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522 (Japan); Heavy-Ion Radiobiology Research Group, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage-ku, Chiba 263-8555 (Japan); Okayasu, Ryuichi [Heavy-Ion Radiobiology Research Group, National Institute of Radiological Sciences, 4-9-1, Anagawa, Inage-ku, Chiba 263-8555 (Japan)]. E-mail: firstname.lastname@example.com
BWRVIP-53-A: BWR Vessel and lnternals Project, Standby Liquid Control Line Repair Design Criteria
The Boiling Water Reactor Vessel and Internals Project (BWRVIP), formed in June, 1994, is an association of utilities focused exclusively on BWR vessel and internals issues. This BWRVIP report documents criteria which can be used to design a repair for the standby liquid control (SLC) line in a BWR. A previous version of this report was published as BWRVIP-53 (TR-108716). This report (BWRVIP-53- A) incorporates changes proposed by the BWRVIP in response to U.S. Nuclear Regulatory Commission (NRC) Request...
Welding and Repair Technology Center: Assessment of Friction Stir Welding for Nuclear Applications
This report describes a study that was conducted to determine the usability of friction stir welding (FSW) for the repair of nuclear power plant components. The first phase of the study has performinged in air and underwater welding on 304 SS, 308L SS, Alloy182, and Alloy 600 test plates. In addition, crack sealing tests were carried out using electric discharge machining notches in these test plates. A patch seal test was also added to the test matrix to determine if a flat plate could be ...
NRG Chemical Engineering | Open Energy Information
Chemical Engineering Jump to: navigation, search Name NRG Chemical Engineering Place United Kingdom Sector Biofuels Product UK-based firm which in May 2007 signed an agreement with...
Argonne Chemical Sciences & Engineering - 2008 Awards
8 Awards Robert E. Wilson Award, American Institute of Chemical Engineers, Nuclear Engineering Division, Ralph Leonard President's Achievement Award, American Scientific...
COURSE NOTES: Nuclear Engineering Materials (NEEP 423)
Jul 2, 2008 ... "Nuclear Engineering Materials (NEEP 423)." Department of Engineering Physics . Fall 2006. University of Wisconsin-Madison. Launch Site
ORISE: Nuclear engineering graduates decrease in 2009
Nuclear engineering degrees decrease, enrollments increase in 2009 ORISE report shows unexpected decline in 2009 in nuclear engineering degrees but largest enrollment since mid...
LedEngin Inc | Open Energy Information
Name LedEngin, Inc Place Santa Clara, California Zip 95054 Product Developer of Light Emitting Diode (LED) technology for medical and portable applications. References LedEngin,...
AMO Industrial Distributed Energy: Advanced Reciprocating Engine...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
gas fueled engines for power generation that combine high efficiency, low emissions, fuel flexibility, and reduced cost of ownership. Phase I of the Cummins reciprocating engine...
Scientific Software Engineering: High Performance Computing,...
1 Home Services Software Quality Assurance Software Engineering CONTACTS Group Leader Steve Painter Deputy Group Leader Cecilia Rivenburgh Software Engineering Lead Scott Matthews...
Incorporating Green Engineering and Sustainability into the ...
Presentation Title, Incorporating Green Engineering and Sustainability into the Engineering Curriculum. Author(s), Richard D Sisson, James C O'Shaughnessy, �...
Engine emissions control apparatus and method
This patent describes an apparatus for reducing the emissions of a diesel engine. It comprises: a hydrous alcohol fuel of between about 33 percent and about 70 percent alcohol by volume and between about 30 percent and 67 percent water by volume; a fuel injector for delivering the hydrous alcohol fuel for combustion in the engine; and means for controlling the delivery of the fuel to the engine in response to operating conditions of the engine, such that the fuel is delivered for combustion only when the engine is being operated to increase the rate of engine revolutions and when the engine is being operated substantially to maintain the rate of engine revolutions.
Fosseen, D.
Environment/Health/Safety (EHS): Safety Engineering
Safety Engineering Safety Engineering provides occupational safety services to support the Lab's mission. This includes injury and illness prevention and loss control systems for...
Renewable Energy Engineering LLC | Open Energy Information
Engineering LLC Jump to: navigation, search Name Renewable Energy Engineering, LLC Place Newberg, Oregon Zip 22700 Sector Renewable Energy Product Oregon-based renewable energy...
Tomorrow's Women Engineers | Department of Energy
Women Engineers December 8, 2010 - 11:53am Addthis Middle school girls attending the Argonne National Laboratorys "Introduce a Girl to Engineering Day." Middle school girls...
Argonne TDC: Packer Engineering - Argonne National Laboratory
Simulation work with small business leads to 250 jobs in Illinois. Packer Engineering Naperville, IL. Packer Engineering worked with Argonne to share advanced ...
A Roadmap for Engineering Piezoelectricity in Graphene
Roadmap for Engineering Piezoelectricity in Graphene A Roadmap for Engineering Piezoelectricity in Graphene Doping this 'Miracle Material' May Lead to New Array of Nanoscale...
Argonne Chemical Sciences & Engineering - National Security ...
Security Home National Security - Nanoscale Engineering Super-absorbent gel Using this spray-on, super-absorbent gel and engineered nanoparticles, Argonne researchers are...
Sputnik Engineering AG | Open Energy Information
"Sputnik Engineering AG" Retrieved from "http:en.openei.orgwindex.php?titleSputnikEngineeringAG&oldid351629" Categories: Clean Energy Organizations Companies...
Caledonian College of Engineering | Open Energy Information
Engineering" Retrieved from "http:en.openei.orgwindex.php?titleCaledonianCollegeofEngineering&oldid343147" Categories: Clean Energy Organizations Companies Organizations...
BPM Diesel Engineering | Open Energy Information
Diesel Engineering" Retrieved from "http:en.openei.orgwindex.php?titleBPMDieselEngineering&oldid342997" Categories: Clean Energy Organizations Companies Organizations...
Biomass Engineering Ltd | Open Energy Information
"Biomass Engineering Ltd" Retrieved from "http:en.openei.orgwindex.php?titleBiomassEngineeringLtd&oldid342847" Categories: Clean Energy Organizations Companies...
Departmental Information Systems Engineering (Volume 1) | Department...
Documents & Publications Departmental Information Systems Engineering (Volume 2) Systems Engineering Methodology (SEM) Audit Report: IG-0836 Energy.gov Careers & Internships...
Geothermal Engineering Ltd | Open Energy Information
Engineering Ltd." Retrieved from "http:en.openei.orgwindex.php?titleGeothermalEngineeringLtd&oldid345808" Categories: Clean Energy Organizations Companies...
Intern Programs | Italian SSSA Engineering Graduate Students
summer internships to outstanding graduate engineering students. In this comprehensive program interns work with scientists or engineers on projects related to Fermilab's...
Systems Engineering | Global and Regional Solutions
technologies to a wide range of complex systems. Some examples of program areas include nuclear power plant safety, human factors engineering, and electric power engineering....
Dynamics of Free Piston Stirling Engines.
??Free piston Stirling engines (FPSEs) are examples of closed cycle regenerative engines, which can be used to convert thermal energy into mechanical energy. FPSEs are� (more)
Choudhary, Farhan
Chemical and Engineering Materials | Neutron Science | ORNL
Materials SHARE Chemical and Engineering Materials Neutron-based research at SNS and HFIR in Chemical and Engineering Materials strives to understand the structure and dynamics...
Sandia National Labs: Materials Science & Engineering, Materials...
MATERIALS SCIENCE & ENGINEERING HOME OrganizationMission Capabilities Awards & Accomplishments Patents MATERIALS SCIENCE AND ENGINEERING CENTER Techniques 1 2 3 4 5 6 7 These are...