text:
Office of Scientific and Technical Information
Unlimited Release
E-Print Network (OSTI)
Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U. S. Department of Energy�s National Nuclear Security Administration under Contract DE-AC04-94AL85000. Approved for public release; further dissemination unlimited. SAND2012-7341P
unknown authors
Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U. S. Department of Energy�s National Nuclear Security Administration under Contract DE-AC04-94AL85000. Approved for public release; further dissemination unlimited. SAND2012-7340P
Office of Scientific and Technical Information (OSTI)
Unlimited Release Unlimited Release Printed November 1987 Proceedings of The Wellbore Sampling Workshop Richard K. Traeger, Barry W. Harding Prepared by Sandia National Laboratories Albuquerque, New Mexico 87185 and Livermore, California 9 4 5 5 0 f o r the United States Department of Energy . under Contract DE-AC04-76DP00789 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency Thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately
Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy�s National Nuclear Security Administration under Contract DE-AC04-94AL85000. Approved for public release, further dissemination unlimited. Issued by Sandia National Laboratories, operated for the United States Department of Energy by Sandia Corporation. NOTICE: This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government, nor any agency thereof, nor any of their employees, nor any of their contractors, subcontractors, or their employees, make any warranty, express or implied, or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represent that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government, any agency thereof, or any of their contractors or subcontractors. The views and opinions expressed herein do not necessarily state or reflect those of the United States Government, any agency thereof,
B. L. Larsen; Barbara L. Larsen
Virtual radiation fields for ALARA determination
SciTech Connect
As computing power has increased, so too has the ability to model and simulate complex systems and processes. In addition, virtual reality technology has made it possible to visualize and understand many complex scientific and engineering problems. For this reason, a virtual dosimetry program called Virtual Radiation Fields (VRF) is developed to model radiation dose rate and cumulative dose to a receptor operating in a virtual radiation environment. With the design and testing of many facilities and products taking place in the virtual world, this program facilitates the concurrent consideration of radiological concerns during the design process. Three-dimensional (3D) graphical presentation of the radiation environment is made possible through the use of IGRIP, a graphical modeling program developed by Deneb Robotics, Inc. The VRF simulation program was designed to model and display a virtual dosimeter. As a demonstration of the program`s capability, the Hanford tank, C-106, was modeled to predict radiation doses to robotic equipment used to remove radioactive waste from the tank. To validate VRF dose predictions, comparison was made with reported values for tank C-106, which showed agreement to within 0.5%. Graphical information is presented regarding the 3D dose rate variation inside the tank. Cumulative dose predictions were made for the cleanup operations of tank C-106. A four-dimensional dose rate map generated by VRF was used to model the dose rate not only in 3D space but also as a function of the amount of waste remaining in the tank. This allowed VRF to predict dose rate at any stage in the waste removal process for an accurate simulation of the radiological conditions throughout the tank cleanup procedure.
Knight, T.W.
Science Conference Proceedings (OSTI)
VRF (virtual radiation fields) was developed to accurately predict the radiation dose received by a person or robotic device with minimum effort. Dose calculations are performed using Monte Carlo techniques while the user interacts with the computer via a user-friendly graphical interface. The code has been utilized for the prediction of radiation doses from the Hanford Reservation waste tanks, particularly tank c-106. This paper describes the features of the code and evaluates it`s application to tank c-106.
Knight, T.W.; Dalton, G.R.; Tulenko, J.S. [Univ. of Flordia, Gainesville, FL (United States)
CONTRACTOR REPORT SAND96-2555 UC-1243 Unlimited Release
NLE Websites -- All DOE Office Websites (Extended Search)
CONTRACTOR REPORT SAND96-2555 UC-1243 Unlimited Release A Study of Productionlnjection Data from Slim Holes and Large-Diameter Wells at the Takigami Geothermal Field, Kyushu,...
Inverters Unlimited Inc | Open Energy Information
Open Energy Info (EERE)
Unlimited Inc Jump to: navigation, search Name Inverters Unlimited Inc Place New York Zip 12205 Sector Solar Product US-based manufacturer of solar inverters. References...
Energy Unlimited Inc | Open Energy Information
Energy Unlimited is a privately held company specializing in the development of wind energy and the total management of wind energy projects. References Energy Unlimited...
Virtual radiation fields -- A virtual environment tool for radiological analysis and simulation
A virtual reality system was developed for computational and graphical modeling and simulation of radiation environments. This system, called Virtual Radiation Fields (VRF), demonstrates the usefulness of radiological analysis in simulation-based design for predicting radiation doses for robotic equipment and personnel working in a radiation environment. The system was developed for use in determining the radiation doses for robotic equipment to be used in tank-waste retrieval operations at the Hanford National Laboratory. As a reference case, specific application is made to simulate cleanup operations for Hanford tank C-106. A three-dimensional model representation of the tank and its predicted radiation levels are presented and analyzed. Tank cleanup operations were simulated to understand how radiation levels change during the cleanup phase and to predict cumulative radiation doses to robotic equipment to aid in the development of maintenance and replacement schedules.
Knight, T.W.; Dalton, G.R.; Tulenko, J.S. [Univ. of Florida, Gainesville, FL (United States). Dept. of Nuclear Engineering Sciences
Virtually distortion-free imaging system for large field, high resolution lithography
DOE Patents (OSTI)
Virtually distortion free large field high resolution imaging is performed using an imaging system which contains large field distortion or field curvature. A reticle is imaged in one direction through the optical system to form an encoded mask. The encoded mask is then imaged back through the imaging system onto a wafer positioned at the reticle position.
Hawryluk, Andrew M. (Modesto, CA); Ceglio, Natale M. (Livermore, CA)
Google+ virtual field trip: "Vehicle Electrification" (11/18/13) | Argonne
Google+ virtual field trip: "Vehicle Electrification" (11/18/13) Google+ virtual field trip: "Vehicle Electrification" (11/18/13) Share Topic Energy Energy efficiency Vehicles Electric drive technology Browse By - Any - Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering ---Diesel ---Electric drive technology ---Hybrid & electric vehicles ---Powertrain research --Building design ---Construction --Manufacturing -Energy sources --Renewable energy ---Bioenergy ---Solar energy --Fossil fuels ---Natural Gas --Nuclear energy ---Nuclear energy modeling & simulation ---Nuclear fuel cycle ---Reactors -Energy usage --Energy storage ---Batteries ----Lithium-ion batteries ----Lithium-air batteries --Electricity transmission --Smart Grid Environment -Biology --Computational biology --Environmental biology
Availability Statements for Unclassified Unlimited STI Products |
Availability Statements for Unclassified Unlimited STI Products Availability Statements for Unclassified Unlimited STI Products Print page Print page Email page Email page DOCUMENT AVAILABILITY Online Access: U.S. Department of Energy (DOE) reports produced after 1991 and a growing number of pre-1991 documents are available free via DOE's SciTech Connect (http://www.osti.gov/scitech) Reports not in digital format may be purchased by the public from the National Technical Information Service (NTIS): U.S. Department of Commerce National Technical Information Service 5301 Shawnee Rd Alexandra, VA 22312 www.ntis.gov Phone: (800) 553-NTIS (6847) or (703) 605-6000 Fax: (703) 605-6900 Email: email@example.com Reports not in digital format are available to DOE and DOE contractors from the Office of Scientific and Technical Information (OSTI):
Solar Unlimited USA | Open Energy Information
Logo: Solar Unlimited USA Name Solar Unlimited USA Address 2353 Park Ave. Place Cedar City, Utah Zip 84721 Sector Solar Product Solar energy systems Year founded 1998 Phone number 435-867-9876 Website http://solarunlimited.net/ Coordinates 37.6944762°, -113.0937928° 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":37.6944762,"lon":-113.0937928,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}
Developing virtual storytellers for the virtual Alhambra
Thanks to the technological advances in the last ten years, the recreation of 3D virtual worlds is becoming increasingly popular in several application fields. Desktop virtual reality is one of the best ways of reaching a good number of users through ... Keywords: interactive storytelling, virtual reality, virtual storyteller, virtual tourism
Jos� L. Fuertes; �ngel L. Gonz�lez; Gonzalo Mariscal; Carlos Ruiz
SANDlA REPORT Unlimited Release
SANDlA REPORT SANDlA REPORT Unlimited Release Printed October 1995 SAND95-2129 UC-607 '4 d Oleoresin Capsicum Toxicology Evaluation and Hazard Review Melecita M. Archuleta Issued by Sandia National Ldxratories, operated for the United States Department of Energy by Sandia Corporation. NOTICE: This report was prepared as an account of work sponsored by a n agency of the United States Government. Neither the United States Govern- ment nor any agency thereof, nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, prod- uct, or process disclosed, or represents that its
SAND76-0260 Unlimited Release
SAND76-0260 SAND76-0260 Unlimited Release Printed July 1976 . POWER SUPPLIES FOR SPACE SYSTEMS QUALITY ASSURANCE BY SANDIA LABORATORIES Robert L. Hannigan Robert R. Harnar Electronic and Electrical Devices Division 951 2 Sandia Laboratories Albuquerque, NM 87115 AB STRAC T This report summarizes the Sandia Laboratories participation in Quality Assurance programs for Radioisotopic Thermoelectric Generators which have been used i n space systems over the past 10 years. Basic elements of this QA program a r e briefly de- scribed and recognition of assistance from other Sandia organizations is included. Descriptions of the various systems f o r which Sandia has had the QA responsibility a r e presented, including SNAP 1 9 (Nimbus, Pioneer, Viking), SNAP 27 (Apollo),
Unlimited Energy GmbH | Open Energy Information
Unlimited Energy GmbH Unlimited Energy GmbH Jump to: navigation, search Name Unlimited Energy GmbH Place Berlin, Germany Zip 12435 Sector Solar, Wind energy Product Unlimited Energy is a German-based project developer, specialising in wind and solar projects. Coordinates 52.516074°, 13.376987° 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":52.516074,"lon":13.376987,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}
Effect of self-magnetic fields on the nonlinear dynamics of relativistic electron beam with virtual cathode
The report is devoted to the results of the numerical study of the virtual cathode (VC) formation conditions in the relativistic electron beam (REB) under the influence of the self-magnetic and external axial magnetic fields. The azimuthal instability of the relativistic electron beam leading to the formation of the vortex electron structure in the system was found out. This instability is determined by the influence of the self-magnetic fields of the relativistic electron beam, and it leads to the decrease of the critical value of the electron beam current (current when the non-stationary virtual cathode is formed in the drift space). The typical dependencies of the critical current on the external uniform magnetic field value were discovered. The effect of the beam thickness on the virtual cathode formation conditions was also analyzed.
Hramov, A. E.; Koronovskii, A. A. [Saratov State University, Astrakhanskaja 83, Saratov 410012, Russia Saratov State Technical University, Politechnicheskaja 77, Saratov 410028 (Russian Federation); Kurkin, S. A. [Saratov State University, Astrakhanskaja 83, Saratov 410012 (Russian Federation); Filatova, A. E. [Saratov State Technical University, Politechnicheskaja 77, Saratov 410028 (Russian Federation)
Virtually distortion-free imaging system for large field, high resolution lithography using electrons, ions or other particle beams
Virtually distortion free large field high resolution imaging is performed using an imaging system which contains large field distortion or field curvature. A reticle is imaged in one direction through the optical system to form an encoded mask. The encoded mask is then imaged back through the imaging system onto a wafer positioned at the reticle position. Particle beams, including electrons, ions and neutral particles, may be used as well as electromagnetic radiation.
Hawryluk, A.M.; Ceglio, N.M.
Energy Unlimited Wind Farm II | Open Energy Information
II II Facility Energy Unlimited Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Energy Unlimited Developer Energy Unlimited Energy Purchaser Southern California Edison Co Location San Gorgonio CA Coordinates 33.9095°, -116.734° 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":33.9095,"lon":-116.734,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}
Joule Unlimited previously Joule Biotechnologies | Open Energy Information
Joule Unlimited previously Joule Biotechnologies Joule Unlimited previously Joule Biotechnologies Jump to: navigation, search Name Joule Unlimited (previously Joule Biotechnologies) Place Cambridge, Massachusetts Zip 2142 Product Massachusetts-based industrial biotechnology company developing transformative systems to enable highly efficient, low-cost cell-based biodiesel production. Coordinates 43.003745°, -89.017499° 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":43.003745,"lon":-89.017499,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}
Immersive Virtual Reality System Using BIM Application With Extended Vertical Field Of View
Building Information Modeling (BIM) model contains information about structural, architectural, MEP (Mechanical Electrical and Plumbing) and other numerous components of a building. Among these components, MEP constitutes about 50% of the project cost, and its design is relatively more complex because of the limited headroom available to locate these components. The coordination of these systems involves locating and routing several subcomponents in a manner that satisfies different types of constraints. The earlier version of BIM Computer Aided Virtual Environment (CAVE) did not have provisions to show the overhead components of a BIM model. Conventionally, models had to be tilted to visualize the overhead components. The process of tilting the models to look up is considered counterintuitive. Some of the popular CAVEs developed by leading Universities have a screen on top to show the overhead components but they have a major shortcoming with them. The BIM models had to be converted to a specific format before they can be visualized in the CAVE environments. This study is an attempt to address the shortcomings of the previous version of the BIM CAVE by suggesting a prototype setup with a 55" LCD screen on top of the existing three vertically placed LCD screens. The addition of one more screen on top increases the vertical field of view, that is, the extent to which the user can see vertically in a BIM model. The new BIM CAVE setup is run by a custom built application that makes use of the .Net API (Application Programming Interface) of the commercially available BIM application, Autodesk Navisworks 2012, to control the camera views for achieving an almost seamless semi-immersive virtual environment. The main objective of this research is to validate the effectiveness of the new setup suggested by using a qualitative research methodology called phenomenological study. Semi-structured informal interviews were conducted with the subject matter experts (SMEs) who are experienced in the field of BIM to know about the differences in the user experience after adding a screen on top of the earlier BIM CAVE setup. The main idea behind this qualitative research technique is to develop an understanding of how the SMEs perceived the idea of looking up to see the overhead components of the BIM model. This thesis explains the steps followed to develop the modified BIM CAVE setup in detail and findings of the qualitative study to know about the effectiveness of the suggested new setup.
Ganapathi Subramanian, Adithya
Distribution Statement A: Approved for public release; distribution is unlimited.
: Approved for public release; distribution is unlimited. AHPCRC, The Army High Performance Computing for the warfighter. High performance computing (HPC) provides significant advantages in designing and characterizing theories and best practices of simulation-based engineering sciences and high performance computing
Prinz, Friedrich B.
Approved for public release; distribution is unlimited. NAVAL POSTGRADUATE SCHOOL
1995 Thesis Advisor: Michael J. Zyda Thesis Co-Advisor: John S. Falby #12;Public reporting burden-18 REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 1. AGENCY USE ONLY (Leave Blank) 2. REPORT DATEApproved for public release; distribution is unlimited. THESIS NAVAL POSTGRADUATE SCHOOL Monterey
Zyda, Michael
Coexistence of unlimited bipartite and multipartite Einstein-Podolsky-Rosen entanglement
Quantum mechanics imposes 'monogamy' constraints on the sharing of entanglement. We show that, despite these limitations, entanglement can be simultaneously present in unlimited two-body and many-body forms in continuous variable systems. This is demonstrated in experimentally producible multimode states of light fields or atomic ensembles, which therefore enable infinitely more freedom in the distribution of information, as opposed to system of qubits where such entanglement structure is impossible. This is a central finding for the quantification, understanding and potential exploitation of shared quantum correlations, and may lead to novel realisations of robust multiparty communication networks and scalable quantum computation.
Adesso, G; Illuminati, F; Adesso, Gerardo; Ericsson, Marie; Illuminati, Fabrizio
SANDIA REPORT SAND2007-4352P Unlimited Release
352P 352P Unlimited Release Printed September 2007 Calendar Year 2006 Annual Site Environmental Report for Sandia National Laboratories, New Mexico Matthew Sneddon, Susan Koss, Rebecca Sanchez and Charlene Cunningham Prepared by Sandia National Laboratories Albuquerque, New Mexico 87185 Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under Contract DE-AC04-94Al85000. Approved for public release; further dissemination unlimited. Issued by Sandia National Laboratories, operated for the United States Department of Energy by Sandia Corporation. NOTICE: This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States
Energy Unlimited Wind Farm I | Open Energy Information
I I Facility Energy Unlimited Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Developer Energy Unlimited Energy Purchaser Southern California Edison Co Location San Gorgonio CA Coordinates 33.9095°, -116.734° 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":33.9095,"lon":-116.734,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}
Innovative Solutions Unlimited, LLC (InSolves) | Open Energy Information
Solutions Unlimited, LLC (InSolves) Solutions Unlimited, LLC (InSolves) Jump to: navigation, search Name Innovative Solutions Unlimited, LLC (InSolves) Address 1862 Shyville Road Place Piketon, Ohio Zip 45661 Sector Renewable Energy Product Consulting; Engineering/architectural/design; Maintenance and repair;Manufacturing; Retail product sales and distribution;Trainining and education;Other:Access Control / Security: Nuclear Phone number 740-289-3282 Website http://www.insolves.com Coordinates 39.0510662°, -82.9957658° 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":39.0510662,"lon":-82.9957658,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}
Virtual Exhibits
the Museum Exhibitions Norris Bradbury Museum Lobby Defense Gallery Research Gallery History Gallery TechLab Virtual Exhibits invisible utility element Virtual Exhibits Virtual...
SANDIA REPORT SAND95-2049 UC-700 Unlimited Release
5-2049 UC-700 5-2049 UC-700 Unlimited Release Printed August 1995 c CHAPARRAL: A Library for Solving Large Enclosure Radiation Heat Transfer Problems Micheal W. Glass Prepared by Sandia National Laboratories Albuquerque, New Mexico 87185 and Livermore, California 94550 for the United S t a t e s Department of Energy under Contract DE-Am-94AL85000 , I , - Issued by Sandia National Laboratories, operated for the United States Department of Energy by Sandia Corporation. NOnCE: This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Govern- ment nor any agency thereof, nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the
SAND97-8490 UC-404 Unlimited Release
SAND97-8490 UC-404 SAND97-8490 UC-404 Unlimited Release Printed March 1997 J Mechanical Properties and Energy Absorption Characteristics of a Polyurethane Foam S. H. Goods, C. L. Neuschwanger, C. Henderson, D. M. Skala DISCLAIMER This report was prepared as a n account of work sponsored by a n agenq of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warrantyy express or impIied, or assumes any legal liabili- ty or responsibility for the accuracy, completeness, or usefulness of any information, appa- ratus, product, or process disdased, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necrsariiy constitute or
SANDIA REPORT SAND98-0260 UC-705 Unlimited Release
8-0260 UC-705 8-0260 UC-705 Unlimited Release Printed February 1998 An Efficient Method for Calculating RMS von Mises Stress in a Random Vibration Environment Daniel J. Segalman, Clay W. G. Fulcher, Garth M. Reese, R Prepared by Sandia National Labora Sc2900Q18-81) Issued by Sanma National Laboratories, operated for the United States Department of Energy by Sandia Corporation. NOTICE: This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Govern- ment nor any agency thereof, nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied, o r assumes any legal liability or responsibility for the accuracy, completeness, o
Strained Ge channel p-type metal-oxide-semiconductor field-effect transistors grown on Si�?��??xGex/Si virtual substrates
We have fabricated strained Ge channel p-type metal-oxide-semiconductor field-effect transistors (p-MOSFETs) on Si�??.�??Ge�??.�?? virtual substrates. The poor interface between silicon dioxide (SiO�??) and the Ge channel ...
Lee, Minjoo L.
CONTRACTOR REPORT SAND952729 Unlimited Release U G A Q O D
r x 12-N -. CONTRACTOR REPORT SAND952729 Unlimited Release U G A Q O D Evaluation of Polyacrylonitrile (PAN) as a Binding Polymer for Absorbers Used to-Treat Liquid Radioactive...
Coexistence of unlimited bipartite and genuine multipartite entanglement: Promiscuous quantum correlations arising from discrete to continuous variable systems
Quantum mechanics imposes 'monogamy' constraints on the sharing of entanglement. We show that, despite these limitations, entanglement can be fully 'promiscuous', i.e. simultaneously present in unlimited two-body and many-body forms in states living in an infinite-dimensional Hilbert space. Monogamy just bounds the divergence rate of the various entanglement contributions. This is demonstrated in simple families of N-mode (N >= 4) Gaussian states of light fields or atomic ensembles, which therefore enable infinitely more freedom in the distribution of information, as opposed to systems of individual qubits. Such a finding is of importance for the quantification, understanding and potential exploitation of shared quantum correlations in continuous variable systems. We discuss how promiscuity gradually arises when considering simple families of discrete variable states, with increasing Hilbert space dimension towards the continuous variable limit. Such models are somehow analogous to Gaussian states with asymptotically diverging, but finite squeezing. In this respect, we find that non-Gaussian states (which in general are more entangled than Gaussian states), exhibit also the interesting feature that their entanglement is more shareable: in the non-Gaussian multipartite arena, unlimited promiscuity can be already achieved among three entangled parties, while this is impossible for Gaussian, even infinitely squeezed states.
Gerardo Adesso; Marie Ericsson; Fabrizio Illuminati
Coexistence of unlimited bipartite and genuine multipartite entanglement: Promiscuous quantum correlations arising from discrete to continuous-variable systems
Quantum mechanics imposes 'monogamy' constraints on the sharing of entanglement. We show that, despite these limitations, entanglement can be fully 'promiscuous', i.e., simultaneously present in unlimited two-body and many-body forms in states living in an infinite-dimensional Hilbert space. Monogamy just bounds the divergence rate of the various entanglement contributions. This is demonstrated in simple families of N-mode (N{>=}4) Gaussian states of light fields or atomic ensembles, which therefore enable infinitely more freedom in the distribution of information, as opposed to systems of individual qubits. Such a finding is of importance for the quantification, understanding, and potential exploitation of shared quantum correlations in continuous variable systems. We discuss how promiscuity gradually arises when considering simple families of discrete variable states, with increasing Hilbert space dimension towards the continuous variable limit. Such models are somehow analogous to Gaussian states with asymptotically diverging, but finite, squeezing. In this respect, we find that non-Gaussian states (which in general are more entangled than Gaussian states) exhibit also the interesting feature that their entanglement is more shareable: in the non-Gaussian multipartite arena, unlimited promiscuity can be already achieved among three entangled parties, while this is impossible for Gaussian, even infinitely squeezed states.
Adesso, Gerardo [Dipartimento di Fisica 'E. R. Caianiello', Universita degli Studi di Salerno, Via S. Allende, I-84081 Baronissi (Italy); CNR-INFM Coherentia , Naples (Italy) and INFN Sezione di Napoli-Gruppo Collegato di Salerno (Italy); Grup d'Informacio Quantica, Universitat Autonoma de Barcelona, E-08193 Bellaterra (Barcelona) (Spain); Ericsson, Marie [Centre for Quantum Computation, DAMTP, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA (United Kingdom); Illuminati, Fabrizio [CNR-INFM Coherentia , Naples (Italy) and INFN Sezione di Napoli-Gruppo ollegato di Salerno (Italy); Dipartimento di Matematica e Informatica Universita degli Studi di Salerno, Via Ponte don Melillo, I-84084 Fisciano (Italy); ISI Foundation for Scientific Interchange, Viale Settimio Severo 65, I-10133 Turin (Italy)
Virtual Tour
*. Bookmark and Share. EBIT Laboratory. EBIT Laboratory Virtual Tour. Click one of the six movies below to download, then ...
IA REP0 SAND85-2809 Unlimited Release UC-92A
IA REP0 SAND85-2809 Unlimited Release UC-92A IA REP0 SAND85-2809 Unlimited Release UC-92A Printed July 1986 High Energy Gas Fracture Experiments in Fluid-Filled Boreholes-Potential Geothermal Application J. F. Cuderman, T. Y. Chu, J. Jung, R. D. Jacobson Prepared by Sandia National Laboratories Albuquerque, New Mexico 87 185 and Livermore, California 94550 for the United States Department of Energy under Contract DE-AC04-76DP00789 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency Thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process
Virtual Money Systems: a Phenomenal Analysis
In the development of virtual communities, a new phenomenon of virtual money is observed and presented high importance to both e-commerce and e-society fields. This paper, as a pioneer research, has attempted to make a phenomenal analysis on the existing virtual money systems. By the analysis, this paper has defined what virtual money is, what its general models are, and how its existing systems work. By the analysis, the features of existing virtual money systems are abstracted and their problems are summarized. Driven by the motivation of utilizing and improving the existing virtual money systems, this paper has outlined a novel generic virtual money system model called Common Money (CONEY) to resolve the problems that bother the existing virtual money systems. Finally, further interesting issues for future research are given. 1.
Jingzhi Guo; Angelina Chow
Primitive Virtual Negative Charge
Physical fields, such as gravity and electromagnetic field, are interpreted as results from rearrangement of vacuum particles to get the equilibrium of net charge density and net mass density in 4-dimensional complex space. Then, both fields should interact to each other in that physical interaction is considered as a field-to-field interaction. Hence, Mass-Charge interaction is introduced with primitive-virtual negative charge defined for the mass. With the concept of Mass-Charge interaction electric equilibrium of the earth is discussed, especially about the electric field and magnetic field of the earth. For unsettled phenomena related with the earth's gravity, such as antigravity phenomenon, gravity anomalies during the solar eclipses, the connection between geomagnetic storms and earthquakes, etc., possible explanations are discussed.
Kim, Kiyoung
Kiyoung Kim
A Self-Gravitational Upper Bound on Localized Energy, Including that of Virtual Particles and Quantum Fields, which Yields a Passable "Dark Energy" Density Estimate
The self-gravitational correction to a localized spherically symmetric static energy distribution is obtained from an upgraded Newtonian model which is energetically self-consistent, and is also obtained from the Birkhoff-theorem extension of the unique "Newtonian" form of the free-space Schwarzschild metric into the interior region of its self-gravitationally corrected source. The two approaches yield identical results, which include a strict prohibition on the gravitational redshift factor ever being other than finite, real and positive. Consequently, the self-gravitationally corrected energy within a sphere of radius r is bounded by r times the "Planck force", namely the fourth power of c divided by G. Even in the absence of spherical symmetry, the same bound, to within a factor of two, is shown to apply. That energy bound rules out any physical singularity at the Schwarzschild radius, and it also cuts off the mass deviation of any interacting quantum virtual particle at the Planck mass. Because quantum uncertainty makes the minimum energy of a quantum field infinite, such a field's self-gravitationally corrected energy essentially attains the Planck force times that field's boundary radius r. Roughly estimating r as c times the age of the universe yields a "dark energy" density of 1.7 joules per cubic kilometer. But if r is put to the Planck length appropriate to the birth of the universe, that energy density changes to the enormous Planck unit value, which could quite conceivably drive primordial "inflation". The density of "dark energy" decreases as the universe expands, but more slowly than the density of ordinary matter decreases. Its evolution suggests "dark energy" has inhomogeneities, which may be "dark matter".
Steven Kenneth Kauffmann
Virtual impactor
A virtual impactor having improved efficiency and low wall losses in which a core of clean air is inserted into the aerosol flow while aerosol flow is maintained adjacent inner wall surfaces of the focusing portion of the impactor. The flow rate of the core and the length of the throat of the impactor's collection probe, as well as the dimensional relationships of other components of the impactor adjacent the separation region of the impactor, are selected to optimize separation efficiency.
Yeh, Hsu-Chi (Albuquerque, NM); Chen, Bean T. (Albuquerque, NM); Cheng, Yung-Sung (Albuquerque, NM); Newton, George J. (Albuquerque, NM)
Evaluation of virtual routing appliances as routers virtual environment.
??A virtual routing appliance is a system for the rapid, automated management and employment of virtual networks. Virtual routing appliances utilize virtual machines to enable� (more)
Al-Amoudi, Ahmed
Virtual Classroom | Department of Energy
Energy.gov (U.S. Department of Energy (DOE)) Indexed Site
Virtual Classroom Virtual Classroom Adobe Connect is as web conferencing tool that is being used as a virtual classroom in an ongoing pilot to conduct virtual Instructor Led...
Virtual Environment and
The levels of immersion and presence felt by users in a Virtual Environment (VE) are very important factors that dictate the quality of the Virtual Reality (VR) experience. Sensori-motor systems, both hardware and software, are the components of a VR system that contribute to generate the VEs and to create the feeling of being there. This paper reviews the different visualization hardware/software components that are at the heart of a VR system and provides means for assessing their performance in the context of various applications. Because of its historical and functional importance in the field of VR, visualization hardware is reviewed first (HMDs, VRDs, stereo glasses, CRT, LCD monitors and Plasma displays...). Then, a list of the most important insights, which should be addressed when designing and assembling a VR system, are discussed. Finally, visualization software is covered in the context of the available hardware components.
Sensori-Motor Activities Visualization; M. Mokhtari; F. Lemieux; F. Bernier; D. Ouellet; R. Drouin; D. Laurendeau; A. Branzan-albu
A virtual impactor is described having improved efficiency and low wall losses in which a core of clean air is inserted into the aerosol flow while aerosol flow is maintained adjacent to the inner wall surfaces of the focusing portion of the impactor. The flow rate of the core and the length of the throat of the impactor's collection probe, as well as the dimensional relationships of other components of the impactor adjacent the separation region of the impactor, are selected to optimize separation efficiency. 4 figs.
Yeh, H.C.; Chen, B.T.; Cheng, Y.S.; Newton, G.J.
PNNL: About - Virtual Tour
Tour PNNL Virtually Virtual Tour How to Navigate Before being directed to the tour webpage, here are few instructions on how to navigate. To move directly into the virtual tour,...
Multiple Crystal Cavities for Unlimited X-ray Energy Resolution and
An Intriguing Twist in the Structure of a Cobalt Oxide Catalyst An Intriguing Twist in the Structure of a Cobalt Oxide Catalyst Breaking Records in Neurological Microradiology Exposing Valence-Bond Model Inadequacies Plants' Rapid Response System Revealed Rewriting the Organofluorine Playbook 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 Multiple Crystal Cavities for Unlimited X-ray Energy Resolution and Coherence AUGUST 21, 2012 Bookmark and Share Fabry-Perot resonance spectra (right) of a single-cavity resonator, two cascaded resonators, and a monolithic two-cavity resonator, respectively. Note the significant background of T1 as the Bragg reflectivity from a 10-μm diamond plate is only 59%. By comparison, spectra T2 and T3 are very
Profit-charging market makers with bounded loss, vanishing bid/ask spreads, and unlimited market depth
Four desiderata for automated market makers have appeared in the literature: (1) bounded loss, (2) the ability to make a profit, (3) a vanishing bid/ask spread, and (4) unlimited market depth. Intriguingly, market makers that satisfy any three ... Keywords: algorithmic finance, automated market makers, financial markets, liquidity, market making, market microstructure, markets, prediction markets, wagering
Abraham Othman; Tuomas Sandholm
Virtual Prairie
Visualizing a Real Prairie: Visualizing a Real Prairie: Tools to Represent Your Data Site Index for ( Quadrat Study Project - Prairie Advocates Project - Online Prairie Data) You may use the virtual prairies you create in your presentation. You will need to save the screen or browser window to save the images you create. On the Macintosh, you type open apple-shift-3 to make a Picture file on the hard drive. You can edit these files with Adobe Photoshop or other image editing applications and put them in your report. On a PC with Windows 95, you can type the key combination of "print screen" and the alt key to save what you have displayed in the browser window to the clipboard and then paste it into an image editing application or directly into your report. Create a Quadrat Using Real Data.
Deeply Virtual Neutrino Scattering
We investigate the extension of the deeply virtual Compton scattering process into the weak interaction sector.
Ales Psaker
The metaplastic virtual spaces
Virtual reality systems need new metaphors for their communication. This paper presents a fuzzy enhanced semantic virtual space model. The application of the model tries to improve its conceptualization and definition of a new virtual world system. The ... Keywords: fuzzy, metaphysical, semantic spaces, synaesthesia, virtual reality
Gianluca Mura
Virtual Laboratories
At the frontier of most areas in science, computer simulations play a central role. The traditional division of natural science into experimental and theoretical investigations is now completely outdated. Instead, theory, simulation, and experimentation form three equally essential aspects, each with its own unique flavor and challenges. Yet, education in computational science is still lagging far behind, and the number of text books in this area is minuscule compared to the many text books on theoretical and experimental science. As a result, many researchers still carry out simulations in a haphazard way, without properly setting up the computational equivalent of a well equipped laboratory. The art of creating such a virtual laboratory, while providing proper extensibility and documentation, is still in its infancy. A new approach is described here, Open Knowledge, as an extension of the notion of Open Source software. Besides open source code, manuals, and primers, an open knowledge project provides simulated dialogues between code developers, thus sharing not only the code, but also the motivations behind the code.
Piet Hut
Virtual button interface
An apparatus and method of issuing commands to a computer by a user interfacing with a virtual reality environment. To issue a command, the user directs gaze at a virtual button within the virtual reality environment, causing a perceptible change in the virtual button, which then sends a command corresponding to the virtual button to the computer, optionally after a confirming action is performed by the user, such as depressing a thumb switch.
Jones, Jake S. (Albuquerque, NM)
An apparatus and method of issuing commands to a computer by a user interfacing with a virtual reality environment are disclosed. To issue a command, the user directs gaze at a virtual button within the virtual reality environment, causing a perceptible change in the virtual button, which then sends a command corresponding to the virtual button to the computer, optionally after a confirming action is performed by the user, such as depressing a thumb switch. 4 figs.
Jones, J.S.
Virtual PCR
The polymerase chain reaction (PCR) stands among the keystone technologies for analysis of biological sequence data. PCR is used to amplify DNA, to generate many copies from as little as a single template. This is essential, for example, in processing forensic DNA samples, pathogen detection in clinical or biothreat surveillance applications, and medical genotyping for diagnosis and treatment of disease. It is used in virtually every laboratory doing molecular, cellular, genetic, ecologic, forensic, or medical research. Despite its ubiquity, we lack the precise predictive capability that would enable detailed optimization of PCR reaction dynamics. In this LDRD, we proposed to develop Virtual PCR (VPCR) software, a computational method to model the kinetic, thermodynamic, and biological processes of PCR reactions. Given a successful completion, these tools will allow us to predict both the sequences and concentrations of all species that are amplified during PCR. The ability to answer the following questions will allow us both to optimize the PCR process and interpret the PCR results: What products are amplified when sequence mixtures are present, containing multiple, closely related targets and multiplexed primers, which may hybridize with sequence mismatches? What are the effects of time, temperature, and DNA concentrations on the concentrations of products? A better understanding of these issues will improve the design and interpretation of PCR reactions. The status of the VPCR project after 1.5 years of funding is consistent with the goals of the overall project which was scoped for 3 years of funding. At half way through the projected timeline of the project we have an early beta version of the VPCR code. We have begun investigating means to improve the robustness of the code, performed preliminary experiments to test the code and begun drafting manuscripts for publication. Although an experimental protocol for testing the code was developed, the preliminary experiments were tainted by contaminated products received from the manufacturer. Much knowledge has been gained in the development of the code thus far, but without final debugging, increasing its robustness and verifying it against experimental results, the papers which we have drafted to share our findings still require the final data necessary for publication. The following sections summarize our final progress on VPCR as it stands after 1.5 years of effort on an ambitious project scoped for a 3 year period. We have additional details of the methods than are provided here, but would like to have legal protection in place before releasing them. The result of this project, a suite of programs that predict PCR products as a function of reaction conditions and sequences, will be used to address outstanding questions in pathogen detection and forensics at LLNL. VPCR should enable scientists to optimize PCR protocols in terms of time, temperature, ion concentration, and primer sequences and concentrations, and to estimate products and error rates in advance of performing experiments. Our proposed capabilities are well ahead of all currently available technologies, which do not model non-equilibrium kinetics, polymerase extension, or predict multiple or undesired PCR products. We are currently seeking DHS funding to complete the project, at which time licensing opportunities will be explored, an updated patent application will be prepared, and a publication will be submitted. A provisional and a full patent application have already been filed (1).
Gardner, S N; Clague, D S; Vandersall, J A; Hon, G; Williams, P L
Hot Virtual Reality Sites
... Further, NIST does not endorse any commercial ... Academia Clemson University's VR research and activities. ... a good section on virtual environments ...
Getting `virtual' wrongs right
Whilst some philosophical progress has been made on the ethical evaluation of playing video games, the exact subject matter of this enquiry remains surprisingly opaque. `Virtual murder', simulation, representation and more are found in a literature yet ... Keywords: Computer games, Fiction, Interactivity, Playfulness, Virtual, Virtual murder
Robert Francis Seddon
Virtual Data System on distributed virtual machines in computational grids
This paper presents the work of building a Grid workflow system on distributed virtual machines. A Grid Virtualisation Engine (GVE) is implemented to manage virtual machines as computing resources for Grid applications. The Virtual Data System ... Keywords: compact muon solenoid, distributed virtual machines, grid computing, grid workflow, high energy physics applications, virtual data systems
Lizhe Wang; Gregor Von Laszewski; Jie Tao; Marcel Kunze
DOE Virtual University
Energy.gov (U.S. Department of Energy (DOE))
The Department of Energy Virtual University (DVU) is a central venue for executing, managing, partnering and sharing corporate learning activities and programs. The DVU provides employees cost...
Matsushita's Virtual Kitchen
... Virtual Kitchen, a retail application set up in Japan to help people choose appliances and furnishings for the relatively small kitchen apartment ...
DOE Virtual University | Department of Energy
Services » Learning & Development » DOE Virtual University Services » Learning & Development » DOE Virtual University DOE Virtual University Learn more about DVU The Department of Energy Virtual University (DVU) is a central venue for executing, managing, partnering, and sharing corporate learning activities and programs. Read more Training Resources The Training Resources webpage has the links to the commonly used course catalogs and course schedules used by DOE employees. Course registration links can also be found here. Read more College of Science The College of Science's (CS) mission is to provide DOE employees with the information resources necessary to keep current in the field of science. Read more College of Health Safety & Security Through the National Training Center (NTC), the Office of Health, Safety
Virtual Circuits (OSCARS)
Virtual Circuits (OSCARS) Virtual Circuits (OSCARS) Services Overview ECS Audio/Video Conferencing Fasterdata IPv6 Network Network Performance Tools (perfSONAR) ESnet OID Registry PGP Key Service Virtual Circuits (OSCARS) OSCARS Case Study Documentation Links Hardware Requirements DOE Grids Service Transition Contact Us Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: firstname.lastname@example.com Provide Web Site Feedback: email@example.com Virtual Circuits (OSCARS) ESnet's On-Demand Secure Circuits and Advance Reservation System (OSCARS) provides multi-domain, high-bandwidth virtual circuits that guarantee end-to-end network data transfer performance. Originally a research concept, OSCARS has grown into a robust production service. Currently
Designing and embedding reliable virtual infrastructures
In a virtualized infrastructure where physical resources are shared, a single physical server failure will terminate several virtual servers and crippling the virtual infrastructures which contained those virtual servers. In the worst case, more failures ... Keywords: infrastructure virtualization
Wai-Leong Yeow; C�dric Westphal; Ula? Kozat
High availability using virtualization
High availability has always been one of the main problems for a data center. Till now high availability was achieved by host per host redundancy, a highly expensive method in terms of hardware and human costs. A new approach to the problem can be offered by virtualization. Using virtualization, it is possible to achieve a redundancy system for all the services running on a data center. This new approach to high availability allows to share the running virtual machines over the servers up and running, by exploiting the features of the virtualization layer: start, stop and move virtual machines between physical hosts. The system (3RC) is based on a finite state machine with hysteresis, providing the possibility to restart each virtual machine over any physical host, or reinstall it from scratch. A complete infrastructure has been developed to install operating system and middleware in a few minutes. To virtualize the main servers of a data center, a new procedure has been developed to migrate physical to virtu...
Calzolari, Federico
The Lure of the Virtual
Although organizational scholars have begun to study virtual work, they have yet to fully grapple with its diversity. We draw on semiotics to distinguish among three types of virtual work (virtual teams, remote control, and simulations) based on what ... Keywords: digitization, organizing for innovation, product design, representation, semiotics, simulation, technological change, virtual work
Diane E. Bailey; Paul M. Leonardi; Stephen R. Barley
Design and Implementation of the Radioactive Aerosol's Concentration Measurement System Based on Virtual Training
A Virtual Training System of radioactive aerosol 's concentration measurement is constructed based on Virtual Reality. Firstly, 3-d geometric models about radioactive aerosol's outer environment, detector, intelligent scaler and air sampling pump etc. ... Keywords: Virtual Training, Radioactivity, Aerosol, Radiation Field component
Hui Wei-hua; Huang Chang-qiang; Ding Da-li
Prudhoe Bay Oil Production Optimization: Using Virtual
total field oil production by optimizing the gas discharge rates and pressures at the separation1 Prudhoe Bay Oil Production Optimization: Using Virtual Intelligence Techniques, Stage One: Neural Model Building Shahab D. Mohaghegh, West Virginia University Lynda A. Hutchins, BP Exploration (Alaska
Mohaghegh, Shahab
In the Virtual Extension
To ensure the timely publication of articles, Communications created the Virtual Extension (VE) to expand the page limitations of the print edition by bringing readers the same high-quality articles in an online-only format. VE articles undergo ...
CACM Staff
Virtual Doppler Lidar Instrument
Doppler lidars measure the range-resolved line-of-sight wind component by extracting the Doppler shift of radiation backscattered from atmospheric aerosols and molecules. A virtual instrument was developed to simulate wind measurements by flying ...
Ines Leike; J�rgen Streicher; Christian Werner; Viktor Banakh; Igor Smalikho; Werner Wergen; Alexander Cress
ARM - Measurement - Virtual temperature
govMeasurementsVirtual temperature govMeasurementsVirtual temperature ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Virtual temperature The virtual temperature Tv = T(1 + rv/{epsilon}), where rv is the mixing ratio, and {epsilon} is the ratio of the gas constants of air and water vapor ( 0.622). Categories Atmospheric State Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. ARM Instruments CO2FLX : Carbon Dioxide Flux Measurement Systems MWRP : Microwave Radiometer Profiler RWP : Radar Wind Profiler
ERDC/CERL TN-13-1 February 2013 Approved for public release; distribution is unlimited.
.sirsi.net/client/search/asset:asset?t:ac=$N/1006361 #12;CASI 2013 Work Plan 17 Operational Energy Base Camp Studies: Literature Review of Findings #12;CASI 2013 Work Plan 10 Energy and Water Conservation Assessments: A Field Guide outlines common: IMCOM POC: James Westervelt, CERL #12;CASI 2013 Work Plan 16 Sustainable Energy Solutions Lead: Franklin
US Army Corps of Engineers
Approved for public release; further dissemination unlimited UCRL-JC-152827
-0062 Telephone: (865) 576-8401 Facsimile: (865) 576-5728 E-mail: firstname.lastname@example.com Available for the sale with a magnetized coaxial plasma gun. The Sustained Spheromak Physics Experiment [2] (SSPX) shown in Fig. 1 to the coaxial gun, nine magnetic field coils are utilized to shape the vacuum magnetic flux. This flexibility
Improving virtual appliance management through virtual layered file systems
Managing many computers is difficult. Recent virtualization trends exacerbate this problem by making it easy to create and deploy multiple virtual appliances per physical machine, each of which can be configured with different applications and utilities. ...
Shaya Potter; Jason Nieh
High efficiency virtual impactor
Environmental monitoring of atmospheric air is facilitated by a single stage virtual impactor for separating an inlet flow (Q/sub 0/) having particulate contaminants into a coarse particle flow (Q/sub 1/) and a fine particle flow (Q/sub 2/) to enable collection of such particles on different filters for separate analysis. An inlet particle acceleration nozzle and coarse particle collection probe member having a virtual impaction opening are aligned along a single axis and spaced apart to define a flow separation region at which the fine particle flow (Q/sub 2/) is drawn radially outward into a chamber while the coarse particle flow (Q/sub 1/) enters the virtual impaction opening.
Loo, B.W.
Virtual People: Capturing Human Models to Populate Virtual Worlds
In this paper a new technique is introduced for automatically building recognisable moving 3D models of individual people Realistic modelling of people is essential for advanced multimedia, augmented reality and immersive virtual reality. Current systems ... Keywords: Avatar, Virtual Human, Whole-body Modelling, Humanoid Animation, Virtual Reality, VRML, Vision Techniques, 3D Reconstruction
Adrian Hilton; Daniel Beresford; Thomas Gentils; Raymond Smith; Wei Sun
Multimodal astronaut virtual training prototype
A few dedicated training simulator applications exist that mix realistic interaction devices-like real cockpits in flight simulators-with virtual environment (VE) components. Dedicated virtual reality (VR) systems have been utilized also in astronaut ...
Jukka R�nkk�; Jussi Markkanen; Raimo Launonen; Marinella Ferrino; Enrico Gaia; Valter Basso; Harshada Patel; Mirabelle D'Cruz; Seppo Laukkanen
Virtual Environments for Health Care
... condition and state of consciousness" (Kahaner, 1994 ... reality] stimulations to the human" (Nakajima, Nomura ... of virtual reality simulations to humans. ...
Virtual Human Problem Solving Environments
Abstract. Interest in complex integrated digital or virtual human modeling has seen a significant increase over the last decade. Coincident with that increased interest, Oak Ridge National Laboratory (ORNL) initiated the development of a human simulation tool, the Virtual Human. The Virtual Human includes a problem-solving environment (PSE) for implementing the integration of physiological models in different programming languages and connecting physiological function to anatomy. The Virtual Human PSE (VHPSE) provides the computational framework with which to develop the concept of a "Virtual Human." Supporting the framework is a data definition for modeling parameters, PhysioML, a Virtual Human Database (VHDB), and a Web-based graphical user interface (GUI) developed using Java. Following description of the VHPSE, we discuss four example implementations of models within the framework. Further expansion of a human modeling environment was carried out in the Defense Advanced Research Projects Agency Virtual Soldier Project. SCIRun served as the Virtual Soldier problem solving environment (VSPSE). We review and compare specific developments in these projects that have significant potential for the future of Virtual Human modeling and simulation. We conclude with an evaluation of areas of future work that will provide important extensions to the VHPSE and VSPSE and make possible a fully-integrated environment for human anatomical and physiological modeling: the Virtual Human.
Ward, Richard C [ORNL; Pouchard, Line Catherine [ORNL; Munro, Nancy B [ORNL; Fischer, Sarah Kathleen [ORNL
Virtual Enterprise Modeling and Support Infrastructures: Applying Multi-agent System Approaches
Virtual enterprises paradigm represents an important application field for multi-agent approaches, both in terms of modeling and infrastructure development This article summarizes the main challenges in this field and describes several current Multi-Agent ...
Luis M. Camarinha-Matos; Hamideh Afsarmanesh
Cultural learning in virtual heritage: an overview
The aim of this paper is to present the overview of cultural learning in virtual heritage. In the past, works done on virtual heritage were mostly focused on replicating and visualizing heritage objects for presentation using virtual reality. However, ... Keywords: cultural learning, virtual environment, virtual heritage, visual informatics
Nazrita Ibrahim; Nazlena Mohamad Ali; Noor Faezah Mohd Yatim
Virtual collaboration in oil and gas organizations
This paper covers some general observations regarding the relations between remote operation concepts and virtual organizations. In this paper we will show that remote operation concepts among other things involve developing systems supporting communication ... Keywords: line of operation, lines of operation, remote operation, virtual collaboration, virtual communication, virtual organizations, virtual room
Kenneth Gulbrands�y; Vidar Heps�; Amund Skavhaug
Virtual Rapid Chloride Permeability Test
... final temperature can be manually copied to the final temperature in the test conditions box ... Type of software: Virtual testing of chloride permeability. ...
Development of Virtual Power Plants
Virtual Power Plants We are working in the emerging intersection between information, computation, and complexity Applications * Design * Environmental modeling * Controls with...
Virtual Frog Dissection Kit Tutorial
and function Item 8: Using a different language Item 10: Resetting to defaults Berkeley Lab | ACS | Notice to Users | Whole Frog Project | Virtual Frog Page last modified: 0126...
Applying Virtual Environments to Manufacturing
... Users bring their architectural plans to the Matsushita store ... extension to the original virtual wind tunnel, NASA ... tracker with a graphics generator or a ...
Pools of virtual boxes: building campus grids with virtual machines
A campus grid is a critical component of research cyberinfrastructure. A grid facilitates resource sharing, improving collaboration and increasing the capability to address large scale scientific and engineering problems. Resources comprising a grid ... Keywords: campus grid, deployment, distributed computing, high throughput computing, virtual machines, virtualization
David J. Herzfeld; Lars E. Olson; Craig A. Struble
E-commerce transactions in a virtual environment: virtual transactions
E-commerce is a fundamental method of doing business, such that for a firm to say it is trading at all in the modern market-place it must have some element of on-line presence. Coupled with this is the explosion of the "population" of Massively Multiplayer ... Keywords: E-commerce, Electronic commerce, Metaverses, Virtual environments, Virtual worlds
Simon Scarle; Sylvester Arnab; Ian Dunwell; Panagiotis Petridis; Aristidis Protopsaltis; Sara Freitas
Virtual Optical Comparator
The Virtual Optical Comparator, VOC, was conceived as a result of the limitations of conventional optical comparators and vision systems. Piece part designs for mechanisms have started to include precision features on the face of parts that must be viewed using a reflected image rather than a profile shadow. The VOC concept uses a computer generated overlay and a digital camera to measure features on a video screen. The advantage of this system is superior edge detection compared to traditional systems. No vinyl charts are procured or inspected. The part size and expensive fixtures are no longer a concern because of the range of the X-Y table of the Virtual Optical Comparator. Product redesigns require only changes to the CAD image overlays; new vinyl charts are not required. The inspection process is more ergonomic by allowing the operator to view the part sitting at a desk rather than standing over a 30 inch screen. The procurement cost for the VOC will be less than a traditional comparator with a much smaller footprint with less maintenance and energy requirements.
Thompson, Greg
Uncertainty and Virtual Particles
Incertidumbre y partículas virtuales Incertidumbre y partículas virtuales Volver Principal ESTOY PERDIDO!!! El principio de incerteza de Heisenberg: En 1927, Heisenberg enunció una propiedad fundamental de la mecánica cuántica que dice que es imposible medir EN FORMA EXACTA AMBOS, la posición de una partícula y su ímpetu. Cuanto mayor sea la precisión con que determinamos una, menos sabremos de la otra. Este es el llamado Principio de incerteza de Heisenberg. La relación matemática que lo expresa es: Significa que la incertidumbre en la posición (x), multiplicada por la incertidumbre en el momento (p), es mayor o igual que una constante (h-barra dividido por dos.) Este principio puede también ser escrito en términos de energía y tiempo: Significa que la incertidumbre en la energía de una partícula
Virtual stationary timed automata for mobile networks
In this thesis, we formally define a programming abstraction for mobile networks called the Virtual Stationary Automata programming layer, consisting of real mobile clients, virtual timed I/O automata called virtual ...
Nolte, Tina Ann, 1979-
Static virtual channel allocation in oblivious routing
Most virtual channel routers have multiple virtual channels to mitigate the effects of head-of-line blocking. When there are more flows than virtual channels at a link, packets or flows must compete for channels, either ...
Shim, Keun Sup
Qualitative physics in virtual environments
In this paper, we describe a new approach to the creation of virtual environments, which uses qualitative physics to implement object behaviour. We adopted Qualitative Process Theory as a qualitative reasoning formalism, due to its representational properties ... Keywords: intelligent virtual environments, modelling and simulation, qualitative physics
Marc Cavazza; Simon Hartley; Jean-Luc Lugrin; Mikael Le Bras
Management of high availability services using virtualization.
??This thesis examines the use of virtualization in management of high availability services using open source tools. The services are hosted in virtual machines, which� (more)
Braastad, Espen
Digital Windows: cause + effect between reality + virtuality.
??Digital Windows allow real people in the real world to interact with virtual objects in a virtual world through a direct relationship between real-space and� (more)
Sumsion, F
Performance evaluation and characterization of virtual appliances.
??System virtualization technology continues to increase in popularity across the datacenter. Independent Software Vendors (ISVs) are now using virtual machines to deliver software appliances to� (more)
Chen, Zhaoqian
Idaho National Laboratory - Hydropower Program- Virtual Hydropower...
Virtual Hydropower Prospector do Brasil Access the Virtual Hydropower Prospector do Brasil Disclaimers NOTICE TO USERS The water energy resource and potential project information...
Walking > walking-in-place > flying, in virtual environments
Keywords: human factors, locomotion, neural networks, presence, virtual reality, virtual walking, visual cliff
Martin Usoh; Kevin Arthur; Mary C. Whitton; Rui Bastos; Anthony Steed; Mel Slater; Frederick P. Brooks, Jr.
DOE/RMOTC/05.98001 Hydro-Balanced Stuffing Box Field Test Field Test Project Report
RMOTC/05.98001 RMOTC/05.98001 Hydro-Balanced Stuffing Box Field Test Field Test Project Report Date Published: May 28, 1999 Leo A. Giangiacomo, P.E. Rocky Mountain Oilfield Testing Center 907 N. Poplar, Suite 150 Casper, WY 82601 Distribution A. Approved for public release; Further dissemination unlimited. (Unclassified Unlimited) DOE/RMOTC/05.98001 Hydro-Balanced Stuffing Box Field Test Test Project Report Test Project Report Test Project Report Test Project Report Date Published: May 28, 1999 Leo A. Giangiacomo, P.E. PREPARED FOR THE U.S. DEPARTMENT OF ENERGY ROCKY MOUNTAIN OILFIELD TESTING CENTER 907 N. Poplar, Suite 150 Casper, WY 82601 Work Performed Under RMOTC ERIP Funding Disclaimer This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States
Phone virtualization using a microkemel hypervisor
Virtualization of multi-core hardware is becoming important in enterprise computing using hypervisors such as VMware or Xen. For desktop phones, virtualization can be used to simultaneously run multiple phone OSes on the same desktop phone, and provide ... Keywords: L4, OKL4, embedded microkernel, hypervisor, phone virtualization, virtualization
Amrit Acharya; John Buford; Venky Krishnaswamy
Virtualization: a way towards dynamic IT
This paper focuses on different aspects of Virtualization that will help the IT & development organization to become more strategic to their business. The Dynamic IT strategy helps businesses enhance the capability and efficiency of their people, processes, ... Keywords: virtualization, virtualization software and applications, virtualization types
U. Pawar; M. Bhelotkar
Review: Virtual machine tools and virtual machining-A technological review
Virtual manufacturing systems provide a useful means for products to be manufactured 'right the first time' without the need of physical testing on the shop floor. Earlier research was mostly on developing a virtual manufacturing environment. Over the ... Keywords: Machining simulation, Virtual machine tool, Virtual machining, Virtual system
Aini Abdul Kadir; Xun Xu; Enrico H�mmerle
Virtual workplaces : when metaphors breakdown
Our model of work is shaped by the places we choose to work and the tools we choose to work with. As we introduce new technologies and build new environments our model is changing. Today's virtual workplaces are grounded ...
Gallemore, Thomas W. I. (Thomas Wilson Ira), 1969-
Real illumination from virtual environments
We introduce a method for actively controlling the illumination in a room so that it is consistent with a virtual world. In combination with a high dynamic range display, the system produces both uniform and directional illumination at intensity levels ...
Abhijeet Ghosh; Matthew Trentacoste; Helge Seetzen; Wolfgang Heidrich
Virtual urban traffic network simulator
In this project, I designed and implemented a virtual urban traffic network simulator. The simulator serves as a testbed for human-subject experiments to determine driver behavior in road networks and also as a platform ...
Uh, Jason (Jason J.)
Virtual workspaces in the grid
Despite significant progress in the development of Grid infrastructure, the provisioning of a customized and controllable remote execution environment remains an open issue. This paper introduces the concept of a virtual workspace, a configurable execution ...
Katarzyna Keahey; Ian Foster; Timothy Freeman; Xuehai Zhang; Daniel Galron
Virtual Team Trust: Instrument Development and Validation in an IS Educational Environment
Trust is a major factor influencing the cohesiveness among virtual team members. While recent research in the fields of information systems and management has examined this construct, there are no existing instruments that measure all the different bases ...
Saonee Sarker; Joseph S. Valacich; Suprateek Sarker
Reti attive di distribuzione: le applicazioni Virtual Power Plant e Virtual Utility.
??Il presente lavoro si occupa di nuove applicazioni per la gestione e l�ottimizzazione di risorse distribuite, cos� dette Virtual Power Plant (VPP) o Virtual Utility� (more)
Baroncelli, Paolo
Virtual instrumentation to study galaxies
The MIGALE project (http://www.sai.msu.su/migale) provides databases and data analysis tools to study the evolution of galaxies from z=1 to z=0. It develops and maintain a general database, HyperLeda, to give a homogenized parameterization for 3 million objects, and several archives or specialized databases. It also develops tools to analyse on-the-fly data extracted from the database or obtained through the Virtual Observatory (Virtual Instruments). The package made for this project, Pleinpot, is distributed as open source.
Ph. Prugniel; I. Chilingarian; H. Flores; J. Guibert; R. Haigron; I. Jegouzo; F. Royer; F. Tajahmady; G. Theureau; J. Vetois
Virtualized application performance prediction using system metrics
Virtualized datacenter administrators would like to consolidate virtual machines (VMs) onto as few physical hosts as possible in order to decrease costs, but must leave enough physical resources for each VM to meet application ...
Wanderman-Milne, Skye A
Virtual articulation and kinematic abstraction in robotics
This thesis presents the theory, implementation, novel applications, and experimental validation of a general-purpose framework for applying virtual modifications to an articulated robot, or virtual articulations. These ...
Vona, Marsette Arthur, 1977-
A Web-Based Virtual Lighting Simulator
A Web-Based Virtual Lighting Simulator Title A Web-Based Virtual Lighting Simulator Publication Type Conference Paper LBNL Report Number LBNL-51065 Year of Publication 2002 Authors...
Instructions for Using Virtual Private Network
Virtual Private Network provides access to network drives, and is recommended for use only from a ETIS-provided laptop.�
Virtual Reality for Manufacturing Case Studies
Virtual Reality for Manufacturing - Case Studies. Sandy Ressler National Institute of Standards and Technology firstname.lastname@example.com. ...
Teaching Virtual Reality: Why and How?
This article looks at the teaching aspects of virtual reality, as opposed to the use of virtual reality as a teaching tool (in virtual teaching environments). It is motivated by a perceived need for clarity, focus, and dialogue that are lacking within ...
Grigore C. Burdea
Virtual worlds as a medium for advertising
Online virtual worlds, such as Second Life, are rapidly becoming recognized as a technology of substantial future importance for marketers and advertisers. Many of these virtual worlds provide the potential medium for very rich and varied new and enhanced ... Keywords: MMOG, advertising, marketing, online game, second life, virtual world
Stuart Barnes
A new approach to virtual palpation
In this paper, a new approach to virtual medical abdominal palpation has been introduced. Firstly, we describe palpation as a medical procedure. Then, we analyze the necessity of virtual palpation. Next, we present our survey on the existing work on ... Keywords: function-based, haptic device, palpation, respiration, virtual reality
Shamima Yasmin; Alexei Sourin
Virtual 95th AOCS Annual Meeting & Expo
2004 CD-ROM contains over 120 presentations from many oral and poster presenters from the 95th AOCS Annual Meeting & Expo. Virtual 95th AOCS Annual Meeting & Expo Virtual Meetings DVD & CD-ROMs Expanding on the previous Virtual AOCS Annual Meeting &
The human agent virtual environment
In this paper we describe a multi-agent simulation called the Human Agent Virtual Environment (or HAVE). HAVE is a test bed to explore agent-environment interaction in multi-agent simulation for defence applications. The primary research driver in the ... Keywords: agents and cognitive models, defence, multi-agent simulation and modeling
Michael Papasimeon; Adrian R. Pearce; Simon Goss
Dynamic virtual credit card numbers
Theft of stored credit card information is an increasing threat to e-commerce.We propose a dynamic virtual credit card number scheme that reduces the damage caused by stolen credit card numbers. A user can use an existing credit card account to generate ... Keywords: credit card theft, e-commerce
Ian Molloy; Jiangtao Li; Ninghui Li
Virtual Fieldwork Using Google Earth
Virtual Fieldwork Using Google Earth Advanced Techniques #12;Digital Explorer 1 Gough Square London Fieldwork Using Google Earth compiled by Jamie Buchanan-Dunlop Digital Explorer 71 Regent Studios 8 Andrews Buchanan-Dunlop © 2008 Google © 2008 Ricardo Sgrillo All rights reserved cover design by rob `at
Smith-Konter, Bridget
Empathy in virtual learning environments
How do we engage teachers and learners in the learning process and what are the benefits of this? How do we get students to learn? Many academic institutions of all levels are asking these questions. Throughout the years new teaching methodologies ... Keywords: Second Life, VLEs, e-learning, empathy, engagement, online learning, teaching methodologies, virtual learning environments
Judith Molka-Danielsen; Bryan W. Carter; Alastair Creelman
Virtual Testing for Smart Buildings
Smart buildings promise to revolutionize the way we live. Applications ranging from climate control to fire management can have significant impact on the quality and cost of these services. However, smart buildings and any technology with direct effect ... Keywords: Virtual testing, Smart buildings, HVAC, Pervasive computing
Julien Bruneau; Charles Consel; Marcia O'Malley; Walid Taha; Wail Masry Hannourah
Input devices in mental health applications: steering performance in a virtual reality paths with WiiMote
Recent studies present Virtual Reality (VR) as potentially effective technology in the Mental Health (MH) field. The objective of this paper is to evaluate two interaction techniques (traditional vs novel) using a popular and low-cost input device (WiiMote) ... Keywords: mental health, steering law, virtual reality
Maja Wrzesien; Mar�a Jos� Rup�rez; Mariano Alca�iz
Transportation planning: A virtual reality
An important factor in the development of any base technology is generating it in such a way that these technologies will continue to be useful through systems upgrades and implementation philosophy metamorphoses. Base technologies of traffic engineering including transportation modeling, traffic impact forecasting, traffic operation management, emergency situation routing and re-routing, and signal systems optimization should all be designed with the future in mind. Advanced Traffic Engineering topics, such as Intelligent Vehicle Highway Systems, are designed with advanced engineering concepts such as rules-based design and artificial intelligence. All aspects of development of base technologies must include Total Quality Engineering as the primary factor in order to succeed. This philosophy for development of base technologies for the County of Los Alamos is being developed leveraging the resources of the Center for Advanced Engineering Technology (CAET) at the Los Alamos National Laboratory. The mission of the CAET is to develop next-generation engineering technology that supports the Los Alamos National Laboratory`s mission and to transfer that technology to industry and academia. The CAET`s goal is to promote industrial, academic, and government interactions in diverse areas of engineering technology, such as, design, analysis, manufacturing, virtual enterprise, robotics, telepresence, rapid prototyping, and virtual environment technology. The Center is expanding, enhancing, and increasing core competencies at the Los Alamos National Laboratory. The CAET has three major thrust areas: development of base technologies, virtual environment technology applications, and educational outreach and training. Virtual environment technology immerses a user in a nonexistent or augmented environment for research or training purposes. Virtual environment technology illustrates the axiom, ``The best way to learn is by doing.``
Bradley, J. [Johnson Controls, International (United States); Hefele, J.; Dolin, R.M. [Los Alamos National Lab., NM (United States)
Residential Transient Magnetic Field Research
Residential populations are exposed, in some measure, to transient magnetic fields. Such fields result from virtually all electric and electronic switching operations that may occur within the residence or external to the residence. This report presents the first phase of a study to better characterize these fields and, ultimately, describe their relationship to utility wiring configurations.
DOE Solar Decathlon: Virtual Tours
News News Photos Daily Photos Gallery of Houses Virtual Tours Videos Product Directory Village Energy Balance Education Sponsors History FAQs Contacts Virtual Tours Explore the U.S. Department of Energy Solar Decathlon 2013 houses through 360° panoramic images. Select a team from the list below to take a peek inside. Then use your mouse and the controls in the bottom right corner of the tour image to rotate your view. U.S. Department of Energy Solar Decathlon Mobile Search Search Search Help More Search Options Orange County Great Park, Irvine, California, Oct. 3-13, 2013 Photo of a large group of cheering decathletes. They stand at the end of the Solar Decathlon 2013 village and hold a banner that says "U.S. Department of Energy Solar Decathlon." U.S. Department of Energy Solar Decathlon
Prudhoe Bay Oil Production Optimization: Using Virtual intelligence Techniques, Stage One: Neural Model Building
SPE 77659 Prudhoe Bay Oil Production Optimization: Using Virtual intelligence Techniques, Stage One Exploration (Alaska) and Carl D. Sisk SPE, BP Exploration Copyright 2002, Society of Petroleum Engineers Inc, TX 75083-3836, U.S.A., fax 01-972-952-9435. Abstract Field data from the Prudhoe Bay oil field
Worldwide R&D of Virtual Observatory
Virtual Observatory (VO) is a data intensive online astronomical research and education environment, taking advantages of advanced information technologies to achieve seamless and uniform access to astronomical information. The concept of VO was introduced in late of 1990s to meet challenges brought up with data avalanche in astronomy. This paper reviews current status of International Virtual Observatory Alliance, technical highlights from world wide VO projects, and a brief introduction of Chinese Virtual Observatory.
Chenzhou Cui; Yongheng Zhao
A virtual company concept for reservoir management
This paper describes how reservoir management problems were pursued with a virtual company concept via the Internet and World Wide Web. The focus of the paper is on the implementation of virtual asset management teams that were assembled with small independent oil companies. The paper highlights the mechanics of how the virtual team transferred data and interpretations, evaluated geological models of complex reservoirs, and used results of simulation studies to analyze various reservoir management strategies.
Martin, F.D. [Dave Martin and Associates, Inc. (United States); Kendall, R.P.; Whitney, E.M. [Los Alamos National Lab., NM (United States)
Distributed virtual environment scalability and security
here. I define a virtual environment (VE) as a computer simulation typically involving space and time. This definitely restricts our examination to computerized systems, where otherwise it could rightly include war simulations going back thousands... in the Manhattan Project to model nuclear detonation, implementing a narrowly scoped, non-real-time virtual environment. In subsequent years computer capacity has grown, and with it the scope and responsiveness of virtual environments. VEs are still used...
Miller, John
A virtual ad hoc network testbed
Testing of applications for ad hoc networks poses a special technical challenge due to the difficulty of conducting experiments in an ad hoc network environment at a scale larger than a few nodes. One approach is to conduct experiments in a testbed that ... Keywords: MANETs, SITL, VAN, emulation, hybrid testbed, mobile ad hoc networks, mobile networks, network management, shadow nodes, simulation, software-in-, the-loop, virtual ad hoc networks, virtual machines, virtual networks, virtualisation
Alex Poylisher; Constantin Serban; John Lee; Tai-Chuan Lu; Ritu Chadha; Cho-Yu Jason Chiang; Robert Orlando; Kimberly Jakubowski
Individual Virtual Competence and Its Influence on Work Outcomes
Witnessing both opportunities and challenges in virtual work arrangements, researchers have explored a number of technological, social, and organizational factors in order to improve virtual work effectiveness. However, there is limited understanding ... Keywords: Individual Virtual Competence, Individual Work Outcomes, Virtual Organization, Virtual Work
Yinglei Wang; Nicole Haggerty
Honors for the Virtual Frog Dissection Kit
on Jeopardy in a high school tournament show in November of 1999. Berkeley Lab | ACS | Notice to Users | Whole Frog Project | Virtual Frog Page last modified: 012305...
Playing the Environment: Games as Virtual Ecologies
Playing the Environment: Games as Virtual Ecologies Alendasocial realism, games, environment, ecology 1. INTRODUCTIONversions of the environment? The answer is multifaceted.
Chang, Alenda Y.
Architectural Lighting Analysis in Virtual Lighting Laboratory
Architectural Lighting Analysis in Virtual Lighting Laboratory NOTICE Due to the current lapse of federal funding, Berkeley Lab websites are accessible, but may not be updated...
Virtual Office Community & Computer Lab (VOCC) | ORNL
Virtual Office Community and Computer Lab May 30, 2013 CASL's contributing scientist Jin Yan from Westinghouse explains assembly design to DOE Under Secretary for Science, Steven...
Virtual Hydropower Prospecting � Searching for Hydropower Gold
DOE Green Energy (OSTI)
The availability of geographic information system (GIS) tools and analytical modeling of natural streams has made it possible to perform virtual �river inventories� that were formerly done using topographic maps, stream flow estimates, and physical reconnaissance. The Idaho National Laboratory (INL) in collaboration with the U.S. Geological Survey (USGS) virtually assessed the gross power potential of all natural streams in the United States of America and identified feasible potential project sites and estimated their developable power potential. The results of this virtual prospecting have been incorporated into a GIS application called the Virtual Hydropower Prospector that is available for public use on the Internet.
Douglas G. Hall
Exploring Genome Rearrangements using Virtual ... - CECM
ported extensive transfer of chloroplast DNA to nuclear. DNA [4]. VIRTUAL HYBRIDIZATION. Approximate string matching is defined as identifying, in a text �...
The water energy resource and potential project information provided by the Virtual Hydropower Prospector (VHP) is as accurate as possible within the limitations of the...
Magnetic field generator
A magnetic field generating device provides a useful magnetic field within a specific retgion, while keeping nearby surrounding regions virtually field free. By placing an appropriate current density along a flux line of the source, the stray field effects of the generator may be contained. One current carrying structure may support a truncated cosine distribution, and it may be surrounded by a current structure which follows a flux line that would occur in a full coaxial double cosine distribution. Strong magnetic fields may be generated and contained using superconducting cables to approximate required current surfaces.
Krienin, Frank (Shoreham, NY)
Hybrid Contacts for CZT Virtual Frisch-grid Detectors
In our previous design of virtual Frisch-grid CdZnTe (CZT) detectors, the charge drift-lines can be terminated at the side surfaces before the carriers reach the collecting anode; this results in a loss of signal from the interacting events near the detector's edges. Here, we describe our new design for the anode contact that reduces these edge effects by focusing the electric field towards the detectors' central axes. Four detectors were fabricated with the new hybrid anode contact, and their performances were evaluated and compared to those from the previous design for our virtual Frisch-grid detectors. The results obtained for all four showed similar improvement: therefore, we illustrate them with the findings from one detector.
Camarda G.; Bolotnikov, A.E.; Chan, W.; Cui, Y.; Gul R.; Hossain, A.; Kim, K.; Yang, G.; James, R.B.
Pipeline Morphing and Virtual Pipelines
Pipeline morphing is a simple but effectivetechnique for reconfiguring pipelined FPGA designs at run time. By overlapping computation and reconfiguration, the latency associated with emptying and refilling a pipeline can be avoided. Weshowhow morphing can be applied to linear and mesh pipelines at both word-level and bit-level, and explain how this method can be implemented using Xilinx 6200 FPGAs. We also present an approach using morphing to map a large virtual pipeline onto a small physical pipeline, and the trade-offs involved are discussed.
W. Luk; N. Shirazi; S. R. Guo; P. Y. K. Cheung
EMMA: an adaptive display for virtual therapy
Environments used up to now for therapeutic applications are invariable ones. Their contents can not be changed neither by the therapist nor by the patient. However, this is a technical issue that can be solved with current technology. In this paper, ... Keywords: adaptive display, virtual reality, virtual therapy
Mariano Alca�iz; Cristina Botella; Beatriz Rey; Rosa Ba�os; Jose A. Lozano; Nuria Lasso de la Vega; Diana Castilla; Javier Montesa; Antonio Hospitaler
High availability using virtualization - 3RC
High availability has always been one of the main problems for a data center. Till now high availability was achieved by host per host redundancy, a highly expensive method in terms of hardware and human costs. A new approach to the problem can be offered by virtualization. Using virtualization, it is possible to achieve a redundancy system for all the services running on a data center. This new approach to high availability allows the running virtual machines to be distributed over a small number of servers, by exploiting the features of the virtualization layer: start, stop and move virtual machines between physical hosts. The 3RC system is based on a finite state machine, providing the possibility to restart each virtual machine over any physical host, or reinstall it from scratch. A complete infrastructure has been developed to install operating system and middleware in a few minutes. To virtualize the main servers of a data center, a new procedure has been developed to migrate physical to virtual hosts. ...
Calzolari, Federico; Ciampa, Alberto; Mazzoni, Enrico; Domenici, Andrea; Vaglini, Gigliola; 10.1088/1742-6596/219/5/052017
Evolutionary virtual agent at an exhibition
This paper describes the Evolutionary Virtual Agent (EVA) prototype designed as an interactive entertainment system for a multimedia exhibition. This implementation uses a behavioral engine based on a dynamical subsumption architecture and a 3D animated ... Keywords: conversational character, intelligent agent, physical model, virtual creature
Jean-Claude Heudin
Virtualizing office hours in CS 50
In Fall 2007, we introduced "virtual office hours" into Harvard College's introductory computer science course, CS 50, so that students could meet with teaching fellows (TFs) online to discuss problem sets at any hour from anywhere. Our goals were to ... Keywords: CSCW, collaboration, distance education, virtual office hours
David J. Malan
Enabling scientific workflows in virtual reality
To advance research and improve the scientific return on data collection and interpretation efforts in the geosciences, we have developed methods of interactive visualization, with a special focus on immersive virtual reality (VR) environments. Earth ... Keywords: geosciences, scientific visualization, virtual reality, workflow
Oliver Kreylos; Gerald Bawden; Tony Bernardin; Magali I. Billen; Eric S. Cowgill; Ryan D. Gold; Bernd Hamann; Margarete Jadamec; Louise H. Kellogg; Oliver G. Staadt; Dawn Y. Sumner
Performance implications of virtualizing multicore cluster machines
High performance computers are typified by cluster machines constructed from multicore nodes and using high performance interconnects like Infiniband. Virtualizing such 'capacity computing' platforms implies the shared use of not only the nodes and node ... Keywords: Infiniband, high-performance computing, virtualization
Adit Ranadive; Mukil Kesavan; Ada Gavrilovska; Karsten Schwan
A logic approach to virtual sensor networks
This paper presents a technique that builds a layer of virtual sensors over a sensor network. The virtual sensors are able to infer and provide data for the physical sensors that do not work. The key assumption of our approach is that the physical quantities ...
Luciano Caroprese; Carmela Comito; Domenico Talia; Ester Zumpano
Research on virtual assembly of supercritical boiler
Supercritical boiler is an important measure to solve problems like electricity shortage or energy intensity, with its high combustion efficiency. As supercritical boiler is a large and complex product, it may appear some problems of collision, location ... Keywords: interaction, lightweight model, supercritical boiler, virtools, virtual assembly, virtual reality
Pi-Guang Wei; Wen-Hua Zhu; Hao Zhou
Formalizing the evolution of virtual communities
Collaboration increasingly takes place in virtual communities using the Internet. These communities are socio-technical systems that tend to evolve strongly and become more complex over time. To ensure that the changes to these complex socio-technical ... Keywords: Conversations for specification, Specification process model, Theory of communicative action, Virtual communities
Aldo de Moor; Hans Weigand
Virtual screening on large scale grids
Large scale grids for in silico drug discovery open opportunities of particular interest to neglected and emerging diseases. In 2005 and 2006, we have been able to deploy large scale virtual docking within the framework of the WISDOM initiative against ... Keywords: Avian influenza, Large scale grids, Malaria, Virtual screening
Nicolas Jacq; Vincent Breton; Hsin-Yen Chen; Li-Yung Ho; Martin Hofmann; Vinod Kasam; Hurng-Chun Lee; Yannick Legr�; Simon C. Lin; Astrid Maa�; Emmanuel Medernach; Ivan Merelli; Luciano Milanesi; Giulio Rastelli; Matthieu Reichstadt; Jean Salzemann; Horst Schwichtenberg; Ying-Ta Wu; Marc Zimmermann
Grid-enabled high throughput virtual screening
Large scale grids for in silico drug discovery open opportunities of particular interest to neglected and emerging diseases. In 2005 and 2006, we have been able to deploy large scale virtual docking within the framework of the WISDOM initiative against ... Keywords: avian influenza, large scale grids, malaria, virtual screening
Nicolas Jacq; Vincent Breton; Hsin-Yen Chen; Li-Yung Ho; Martin Hofmann; Hurng-Chun Lee; Yannick Legr�; Simon C. Lin; Astrid Maa�; Emmanuel Medernach; Ivan Merelli; Luciano Milanesi; Giulio Rastelli; Matthieu Reichstadt; Jean Salzemann; Horst Schwichtenberg; Mahendrakar Sridhar; Vinod Kasam; Ying-Ta Wu; Marc Zimmermann
Security and trust in virtual healthcare communities
The main purpose of a virtual healthcare community is to enforce members' collaboration and allow them collectively conduct health care activities. Patient monitoring and medical consultation and support are the most popular activities inside health ... Keywords: health care, security, teleconsultation, trust, virtual communities
Anargyros Chryssanthou; Iraklis Varlamis; Charikleia Latsiou
T-608: HP Virtual Server Environment Lets Remote Authenticated...
8: HP Virtual Server Environment Lets Remote Authenticated Users Gain Elevated Privileges T-608: HP Virtual Server Environment Lets Remote Authenticated Users Gain Elevated...
OLADE Virtual Energy Training Program (CAPEV) | Open Energy Informatio...
Search Page Edit with form History Facebook icon Twitter icon OLADE Virtual Energy Training Program (CAPEV) Jump to: navigation, search Tool Summary Name: OLADE Virtual Energy...
The Virtual Gas Turbine System for Alloy Assesment
Key words: Virtual turbine, Alloy design program, Gas turbine design program, Nickel-base ... developed a virtual gas turbine (VT) system as a combination of.
3Book: A Scalable 3D Virtual Book
This paper describes the 3Book, a 3D interactive visualization of a codex book as a component for digital library and information-intensive applications. The 3Book is able to represent books of almost unlimited length, allows users to read large format books, and has features to enhance reading and sensemaking.
Stuart K. Card; Lichan Hong; Jock D. Mackinlay; Ed H. Chi; H. Chi
Virtual 94th AOCS Annual Meeting and Expo
AOCS has created the first Virtual AOCS Annual Meeting & Expo on CD-ROM. Virtual 94th AOCS Annual Meeting and Expo Virtual Meetings DVD & CD-ROMs AOCS has created the first Virtual AOCS Annual Meeting & Expo on CD-ROM.� bstracts for ev
A semantics driven user interface for virtual saarlouis
Virtual reality can support edutainment applications which seek to provide an engaging experience with virtual objects and spaces. However, these environments often contain scripted avatars and activities that lack the ability to respond or adapt to ... Keywords: ISReal, agents, semantic virtual worlds, virtual saarlouis
Deborah Richards; Stefan Warwas
Applications of virtual reality for visually impaired people
This paper describes in detail the development and applications of a Virtual Reality Simulator for Visually Impaired People. It makes an auditory representation of the virtual environment, rendering the virtual world entirely through the hearing. The ... Keywords: electromagnetic position tracker, spatial sound, virtual reality, visually impaired
M. A. Torres-Gil; O. Casanova-Gonzalez; J. L. Gonzalez-Mora
Dynamic Rightsizing with Quality-Controlled Algorithms in Virtualization Environments
Virtualization and partitioning are the means by which multiple application instances can share and run multiple virtual machines supported by a platform. In a Green Cloud environment, the goal is to consolidate multiple applications onto virtual machines ... Keywords: Cloud Computing, Energy-Saving, Green Cloud, Queuing, Theory Virtual Machine
Ming-Jeng Yang; Chin-Lin Kuo; Yao-Ming Yeh
Improving energy efficiency of buffer cache in virtual machines
Main memory contributes a large fraction of energy consumption in powerful servers running virtualization software to support concurrent virtual machines (VMs). Furthermore, data-intensive applications executing inside virtual machines increase the demand ... Keywords: Buffer Cache,Virtual Machine,Energy Management
Lei Ye; Chris Gniady
Past Project on Visualization and Virtual Reality for ...
NAME: Visualization and Virtual Reality for Manufacturing CONTACT: Sandy Ressler, email@example.com IMPETUS ...
Towards virtualizing the helpdesk: assessing the relevance of knowledge across distance
Managers of information systems face a knowledge crisis as they operate in increasingly heterogeneous, hostile, expertise-poor environments. This problem is compounded for small organizations. This paper presents results from field research on the feasibility ... Keywords: cross-organizational, information reuse, knowledge management, organizational memory, relevance, virtual helpdesk
Kevin F. White; Wayne G. Lutters; Anita H. Komlodi
Multiscale Convective Organization and the YOTC Virtual Global Field Campaign
The Year of Tropical Convection (YOTC) project recognizes that major improvements are needed in how the tropics are represented in climate models. Tropical convection is organized into multiscale precipitation systems with an underlying chaotic order. ...
Mitchell W. Moncrieff; Duane E. Waliser; Martin J. Miller; Melvyn A. Shapiro; Ghassem R. Asrar; James Caughey
Virtual Field Campaigns on Deep Tropical Convection in Climate Models
High-resolution time�height data over warm tropical oceans are examined, from three global atmosphere models [GFDL�s Atmosphere Model 2 (AM2), NCAR�s Community Atmosphere Model, version 3 (CAM3), and a NASA Global Modeling and Assimilation Office ...
Brian Mapes; Julio Bacmeister; Marat Khairoutdinov; Cecile Hannay; Ming Zhao
Trust negotiation: authorization for virtual organizations
Trust negotiation is an authorization approach for open distributed systems, such as dynamic coalitions and other types of virtual organizations. Under the trust negotiation approach to authorization, every resource that might be shared within the coalition ...
M. Winslett; Adam J. Lee; Kenneth J. Perano
Virtualisation: Real security for virtual machines
Server virtualisation offers many real benefits to enterprises, maximising hardware resources and providing significant cost and energy savings. But there is a downside: all of the security issues we battle on networked systems also plague virtual machines, ...
Ulf Mattsson
Virtual CSU-CHILL Radar: The VCHILL
The Virtual CHILL (VCHILL) system makes it possible to transfer the educational and research experience of the Colorado State University dual polarization radar to remote locations over the Internet. The VCHILL operation includes remote control ...
V. Chandrasekar; Yoong-Goog Cho; D. Brunkow; A. Jayasumana
Stakeholder collaboration and engagement in virtual projects
Stakeholder management is an important and common practice in any project, as it allows managers to better manage process, performance and risk. In virtual projects, collaboration and engagement with stakeholders is relatively more complex, challenging, ...
Ofer Zwikael; Arun A. Elias; Mark J. Ahn
Pragmatic Lighting Transition Design for Virtual Environments
This abstract describes and motivates Ideel, a tool to explore expression of high-level lighting design changes for interactive virtual environments. Ideel allows lighting designers to quickly describe lighting changes using a sketchbased interface.
Joshua B. Gross
Robotics virtual rail system and method
A virtual track or rail system and method is described for execution by a robot. A user, through a user interface, generates a desired path comprised of at least one segment representative of the virtual track for the robot. Start and end points are assigned to the desired path and velocities are also associated with each of the at least one segment of the desired path. A waypoint file is generated including positions along the virtual track representing the desired path with the positions beginning from the start point to the end point including the velocities of each of the at least one segment. The waypoint file is sent to the robot for traversing along the virtual track.
Bruemmer, David J. (Idaho Falls, ID); Few, Douglas A. (Idaho Falls, ID); Walton, Miles C. (Idaho Falls, ID)
Occlusion Culling in Large Virtual Environments
In this paper, occlusion testing in very large virtual environments is discussed from two perspectives: a theoretical one, discussing occlusion culling in relation to detail elision (level of detail), and a practical one, relating to an adaptive occlusion-culling ...
Karsten Bormann
Applied Virtual Intelligence in Oil & Gas Industry;
1 Applied Virtual Intelligence in Oil & Gas Industry; Past, Present, & Future Shahab D. Mohaghegh on a daily basis by almost everyone. Credit Card Fraud Detection Bank Loan Approval Bomb Sniffing Devices
Home-based Shared Virtual Memory
In this dissertation, I investigate how to improve the performance of shared virtual memory (SVM) by examining consistency models, protocols, hardware support and applications. The main conclusion of this research is that the performance of shared virtual memory can be significantly improved when performance-enhancing techniques from all these areas are combined. This dissertation proposes home-based lazy release consistency as a simple, effective, and scalable way to build shared virtual memory systems. In home-based protocols each shared page has a home to which all writes are propagated and from which all copies are derived. Two home-based protocols are described, implemented and evaluated on two hardware and software platforms: Automatic Update Release Consistency (AURC), which requires hardware support for fine-grained remote writes (automatic updates), and Homebased Lazy Release Consistency (HLRC), which is implemented exclusively in software. The dissertation investigates the ...
Liviu Iftode
Architectural Lighting Analysis in Virtual Lighting Laboratory Architectural Lighting Analysis in Virtual Lighting Laboratory Speaker(s): Mehlika Inanici Date: July 7, 2003 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Satkartar K. Kinney Virtual Lighting Laboratory is a Radiance-based lighting analysis tool and methodology that proposes transformations in the utilization of computer visualization in lighting analysis and design decision-making. It is a computer environment, where the user has been provided with matrices of illuminance and luminance values extracted from high dynamic range images. The principal idea is to provide the laboratory to the designer and researcher to explore various lighting analysis techniques instead of imposing limited number of predetermined metrics. In addition, it introduces an analysis approach for temporal and spatial lighting
Ion mobility spectrometer with virtual aperture grid
An ion mobility spectrometer does not require a physical aperture grid to prevent premature ion detector response. The last electrodes adjacent to the ion collector (typically the last four or five) have an electrode pitch that is less than the width of the ion swarm and each of the adjacent electrodes is connected to a source of free charge, thereby providing a virtual aperture grid at the end of the drift region that shields the ion collector from the mirror current of the approaching ion swarm. The virtual aperture grid is less complex in assembly and function and is less sensitive to vibrations than the physical aperture grid.
Pfeifer, Kent B. (Los Lunas, NM); Rumpf, Arthur N. (Albuquerque, NM)
Some aspects of virtual black holes
We first consider consistently third-quantize modified gravity. We then analyze certain aspects of virtual black holes in this third-quantized modified gravity. We see how a statistical mechanical origin for the Bekenstein-Hawking entropy naturally arises in this model. Furthermore, the area and hence the entropy of a real macroscopic black hole is quantized in this model. Virtual black holes cause a loss of quantum coherence, which gives an intrinsic entropy to all physical systems that can be used to define a direction of time and hence provide a solution to the problem of time.
Faizal, M., E-mail: firstname.lastname@example.com [University of Durham, Department of Mathematics (United Kingdom)
Providing More Interactivity to Virtual Museums: A Proposal for a VR Authoring Tool
This paper describes the museuVirtual project that is developing an authoring tool for the collaborative building of nonimmersive museums in virtual reality. The rationale behind museuVirtual is based on the observation that virtual museums found on ...
Raul S. Wazlawick; Marta C. Rosatelli; Edla M. F. Ramos; Walter A. Cybis; Bernd H. Storb; Vera R. N. Schuhmacher; Antonio C. Mariani; Tereza Kirner; Claudio Kirner; Lea C. Fagundes
The Mobile Animator: Interactive Character Animation in Collaborative Virtual Environments
We have designed a mobile -PDA-based- interfacefor real-time control of virtual characters in multiusersemi-immersive Virtual Environments -using a large rear-projectionscreen. The proof-of-concept implementation wepresent shows the potential of handheld ...
Mario Guti�rrez; Fr�d�ric Vexo; Daniel Thalmann
Navigation, Wayfinding, and Place Experience within a Virtual City
We report a qualitative study of navigation, wayfinding, and place experience within a virtual city. �Cityscape� is a virtual environment (VE), partially algorithmically generated and intended to be redolent of the aggregate forms of real ...
Craig D. Murray; John M. Bowers; Adrian J. West; Steve Pettifer; Simon Gibson
DOE Virtual Library of Energy Science and Technology | OSTI,...
DOE Virtual Library of Energy Science and Technology DOE Virtual Library of Energy Science and Technology April 13, 1999 Walter L. Warnick, Ph.D., Director Office of Scientific and...
Perspective isosurface and direct volume rendering for virtual endoscopy applications
Virtual endoscopy has proven to be a very powerful tool in endoscopic surgery. However, most virtual endoscopy systems are restricted to rendering isosurfaces or require segmentation in order to visualize additional objects behind occluding tissue. This ...
Henning Scharsach; Markus Hadwiger; Andr� Neubauer; Stefan Wolfsberger; Katja B�hler
Development of extensible virtual instruments for SCADA applications
This paper presents an architecture and design of a solution for virtual instrumentation in SCADA systems. The aim of this approach is to propose a way to design virtual instrumentation based on software components, which ensures uniform, consistent ...
Traian Turc; Adrian Gligor; Cristian Dumitru; Alexandru Morar
Education: Digital Resource Center - WEB: The Virtual Nuclear Tourist
Sep 24, 2007 ... The Virtual Nuclear Tourist website provides extensive balanced information about nuclear power plants. Topics include nuclear power�...
An application of shared virtual reality to situational training
This paper presents current research being undertaken at Sandia National Laboratories to develop a distributed, shared virtual reality simulation system. The architecture of the system is presented within the framework of an initial application: situational ... Keywords: Sandia National Laboratories, computer based training, distributed shared virtual reality simulation, escort training, groupware, inspector training, nuclear nonproliferation treaties, research, shared virtual reality, situational training, user interfaces, virtual reality
S. Stansfield; D. Shawver; N. Miner; D. Rogers
Virtual Wind Speed Sensor for Wind Turbines Andrew Kusiak1
Virtual Wind Speed Sensor for Wind Turbines Andrew Kusiak1 ; Haiyang Zheng2 ; and Zijun Zhang3 Abstract: A data-driven approach for development of a virtual wind-speed sensor for wind turbines is presented. The virtual wind-speed sensor is built from historical wind-farm data by data-mining algorithms
Kusiak, Andrew
Virtual bidding: the good, the bad and the ugly
Virtual bidding has become an integral part of major organized electricity markets in the U.S. over the last decade; in some markets, virtual bids set the price half the time. Although virtual bidding can enhance the efficiency of electricity markets, that does not come without risk. (author)
Celebi, Metin; Hajos, Attila; Hanser, Philip Q
Transparent Accelerator Migration in a Virtualized GPU Environment
This paper presents a framework to support transparent, live migration of virtual GPU accelerators in a virtualized execution environment. Migration is a critical capability in such environments because it provides support for fault tolerance, on-demand ... Keywords: GPU, Virtualization, OpenCL, Migration, VOCL
Shucai Xiao; Pavan Balaji; James Dinan; Qian Zhu; Rajeev Thakur; Susan Coghlan; Heshan Lin; Gaojin Wen; Jue Hong; Wu-chun Feng
Virtual environment for solar energy systems design and testing
This paper refers to a virtual environment which represents the main support for experiments with photovoltaic energy systems in the design and testing stage. This software environment is very useful because, compairing to the experiments with real energetic ... Keywords: artificial intelligence, photovoltaic energy systems, simulator, synchronization, virtual environment, virtual experiments
Lucian Milea; Orest Oltu; Marius Stoian; Sanda Osiceanu
Ada and grace: toward realistic and engaging virtual museum guides
To increase the interest and engagement of middle school students in science and technology, the InterFaces project has created virtual museum guides that are in use at the Museum of Science, Boston. The characters use natural language interaction and ... Keywords: STEM, informal science education, natural language interaction, photoreal characters, virtual human applications, virtual museum guides
William Swartout; David Traum; Ron Artstein; Dan Noren; Paul Debevec; Kerry Bronnenkant; Josh Williams; Anton Leuski; Shrikanth Narayanan; Diane Piepol; Chad Lane; Jacquelyn Morie; Priti Aggarwal; Matt Liewer; Jen-Yuan Chiang; Jillian Gerten; Selina Chu; Kyle White
Energy Efficient Allocation of Virtual Machines in Cloud Data Centers
Rapid growth of the demand for computational power has led to the creation of large-scale data centers. They consume enormous amounts of electrical power resulting in high operational costs and carbon dioxide emissions. Moreover, modern Cloud computing ... Keywords: Energy efficiency, Cloud computing, Energy consumption, Green IT, Resource management, Virtualization, Allocation of virtual machines, Live migration of virtual machines
Anton Beloglazov; Rajkumar Buyya
Investigation on Virtual Assembly and Motion Simulation of Scroll Compressor
It is efficient and economic to excogitate new product of a scroll compressor by means of virtual design. It accords with development and requirement of scroll compressors products currently. Virtual assembly and motion simulation is important process ... Keywords: scroll compressor, virtual assembly, assembly scheme, motion simulation
Haisheng Li; Yinghua Chen
Provisioning Virtual Resources Adaptively in Elastic Compute Cloud Platforms
Provisioning Virtual machines on demand is significant in elastic compute cloud for reliable service delivery. The importance and major difficulty lies in satisfying the conflicting objectives of satisfying contracted service level agreement while lowering ... Keywords: Dynamic Resource Provision, Multi-Tier Applications, Virtual Machines, Virtualized Cloud Platform
Fan Zhang; Junwei Cao; Hong Cai; Cheng Wu
Network traces of virtual worlds: measurements and applications
Although network traces of virtual worlds are valuable to ISPs (Internet service providers), virtual world software developers, and research communities, they do not exist in the public domain. In this work, we implement a complete testbed to efficiently ... Keywords: traffic measurement, traffic modeling, virtual world
Yichuan Wang; Cheng-Hsin Hsu; Jatinder Pal Singh; Xin Liu
Interactive digital storytelling in the sarajevo survival tools virtual environment
Virtual museums enable Internet users to explore museum collections online. The question is how to enhance the viewer's experience and learning in such environments. In the Sarajevo Survival Tools virtual museum we introduced a new concept of interactive ... Keywords: storytelling, user study, virtual museums
Selma Rizvic; Aida Sadzak; Vedad Hulusic; Amela Karahasanovic
Memory-efficient and scalable virtual routers using FPGA
Router virtualization has recently gained much interest in the research community. It allows multiple virtual router instances to run on a common physical router platform. The key metrics in designing network virtual routers are: (1) number of supported ... Keywords: fpga, ip lookup, pipeline, virutal routers
Hoang Le; Thilan Ganegedara; Viktor K. Prasanna
A virtual environment for network testing
The testing of network-based solutions demands a series of tedious tasks such as the deployment of the solution at different nodes and the configuration of different topologies. The manual execution of these tasks is very time consuming and a configurable ... Keywords: Re-configuration, Software testing, Virtual network
Wade A. Fagen; Jo�o W. Cangussu; Ram Dantu
Intelligent content production for a virtual speaker
We present a graphically embodied animated agent (a virtual speaker) capable of reading a plain English text and rendering it in a form of speech accompanied by the appropriate facial gestures. Our system uses a lexical analysis of an English text and ...
Karlo Smid; Igor S. Pandzic; Viktorija Radman
Applications of Virtual Reality to Nuclear Safeguards
This paper explores two potential applications of Virtual Reality (VR) to international nuclear safeguards: training and information organization and navigation. The applications are represented by two existing prototype systems, one for training nuclear weapons dismantlement and one utilizing a VR model to facilitate intuitive access to related sets of information.
Stansfield, S.
Creating Chinkin works in the virtual space
In this paper, a method to enable people to experience "Chinkin" in the virtual space is introduced. Chinkin is a traditional artistic technique to draw designs on lacquer ware with fine lines and dots, and it was widely used to produce Daimyo's utensils ...
Shinji Mizuno
Integrating Pedagogical Agents into Virtual Environments
In order for a virtual environment to be effective as a training tool, it is not enough to concentrate on the fidelity of the renderings and the accuracy of the simulated behaviors. The environment should help trainees develop an understanding of the ...
W. Lewis Johnson; Jeff Rickel; Randy Stiles; Allen Munro
Virtual Prairie: Going Green with Volunteer Computing
A Multi-species prairie composed primarily of clonal plants can achieve different ecological functions. They can be a good source of biofuel, a mean of water purification in agriculture or a biodiversity guardian. The goal of the Virtual Prairie project ...
Malek Smaoui; Marc Garbey; Cendrine Mony
Real-time individualized virtual humans
This tutorial will present the latest techniques to model fast individualized animatable virtual humans for Real-Time applications. As a human is composed of a head and a body, we will analyze how these two parts can be modeled and globally animated ...
Nadia Magnenat-Thalmann; Daniel Thalmann
Towards a virtual organization for data cyberinfrastructure
We report on the exploratory stages of multi-university, multi-research-site, multi-year effort to investigate and compare data practices in multiple cyberinfrastructure projects and their emerging virtual organizations. Our long-term goal is to understand ... Keywords: collaborative work, cyberinfrastructure, scientific data, sensor networks
Christine L. Borgman; Geoffrey C. Bowker; Thomas A. Finholt; Jillian C. Wallis
Environmental-aware virtual data center network
Cloud computing services have recently become a ubiquitous service delivery model, covering a wide range of applications from personal file sharing to being an enterprise data warehouse. Building green data center networks providing cloud computing services ... Keywords: Green ICT, GreenStar Network, Mantychore FP7, Neutral carbon network, Virtual data center
Kim Khoa Nguyen; Mohamed Cheriet; Mathieu Lemay; Victor Reijs; Andrew Mackarel; Alin Pastrama
Green Flexible Opportunistic Computing with Virtualization
Energy efficiency and High computing power are basic design considerations across modern-day computing solutions due to different concerns such as system performance, operational cost, and environmental issues. Opportunistic grid infrastructures offer ... Keywords: grid computing, opportunistic computing, scalable architectures, energy-aware systems, virtualization, performance of systems
Harold Castro; German Sotelo; Cesar O. Diaz; Pascal Bouvry
February 13, 2008 Virtualized Environments for the Harness High Performance Computing Workbench 1/17 Virtualized Environments for the Harness
February 13, 2008 Virtualized Environments for the Harness High Performance Computing Workbench 1/17 Virtualized Environments for the Harness High Performance Computing Workbench Björn Könning1,2, Christian Virtualized Environments for the Harness High Performance Computing Workbench 4/17 Harness HPC Workbench
Engelmann, Christian
vHadoop: A Scalable Hadoop Virtual Cluster Platform for MapReduce-Based Parallel Machine Learning with Performance Consideration
Big data processing is currently becoming increasingly important in modern era due to the continuous growth of the amount of data generated by various fields such as particle physics, human genomics, earth observation, etc. However, the efficiency of ... Keywords: Hadoop, MapReduce, Virtual Cluster, Cloud Computing, Machine Learning, Big Data
Kejiang Ye; Xiaohong Jiang; Yanzhang He; Xiang Li; Haiming Yan; Peng Huang
Virtual Reality in Brazil 2011: RPR-SORS: Real-time photorealistic rendering of synthetic objects into real scenes
This paper presents a review of the Photorealistic Augmented Reality field and proposes a solution for interactively rendering virtual objects into dynamic real scenes in a photorealistic way. This solution features a rendering pipeline that comprises ... Keywords: Augmented reality, Authoring toolkit, Computer graphics, Photorealism, Pipeline
Saulo A. Pessoa; Guilherme de S. Moura; Joao Paulo S. do M. Lima; Veronica Teichrieb; Judith Kelner
Integrating High Performance Computing and Virtual Environments
High performance computing has become accepted as a tool that can be used to solve many large scale computational problems. Because of the complexity of the problems associated with high performance computing, visualization of the output of high performance computing applications has always been an important factor in providing a complete problem solving environment for the high performance computing user. As visualization technology advances, it is important to consider what impacts those advances will have on the integration of high performance computing and visualization. Virtual environments are the most recent, and arguably the most powerful, visualization environments in use today. In this paper we analyze the current state of the research of integrating visualization, and in particular virtual environments, with high performance computing. We also present a framework for implementing such an environment and report on the status of its implementation at the Australian National Un...
Brian Corrie; David Sitsky; Paul Mackerras
Virtual Appliances for Deploying and Maintaining Software
This paper attempts to address the complexity of system administration by making the labor of applying software updates independent of the number of computers on which the software is run. Complete networks of machines are packaged up as data; we refer to them as virtual appliances. The publisher of an appliance controls the software installed on the appliance, from the operating system to the applications, and is responsible for keeping the appliance up to date. These appliances can be configured by users to fit their needs; the configuration is captured such that it can be reapplied automatically when the appliance's software is updated. We have developed a compute utility, called the Collective, which assigns virtual appliances to hardware dynamically and automatically. By keeping software up to date, our approach prevents security break-ins due to fixed vulnerabilities.
Constantine Sapuntzakis David; David Brumley; Ramesh Chandra; Nickolai Zeldovich; Jim Chow; Monica S. Lam; Mendel Rosenblum
Improving query performance in virtual data warehouses
In order to improve the quality of Business Intelligence Systems in an organization we can choose to build the system using BI techniques such as OLAP and data warehousing or by using traditional reports based on SQL queries. The cost and developing ... Keywords: SQL query plans, analytical functions, business intelligence projects, data extraction, indexes, partitioning techniques, query optimization and performance, tuning and optimization, virtual data warehouse
Adela B�ra; Ion Lungu; Manole Velicanu; Vlad Diaconita; Iuliana Botha
Virtual Hydropower Prospector | Open Energy Information
Virtual Hydropower Prospector Virtual Hydropower Prospector Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Virtual Hydropower Prospector Agency/Company /Organization: Idaho National Laboratory Sector: Energy Topics: Resource assessment Resource Type: Software/modeling tools User Interface: Website Website: hydropower.inl.gov/prospector/index.shtml Country: United States Cost: Free Northern America Coordinates: 37.09024°, -95.712891° 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":37.09024,"lon":-95.712891,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}
A web-based virtual lighting simulator
This paper is about a web-based ''virtual lighting simulator,'' which is intended to allow architects and lighting designers to quickly assess the effect of key parameters on the daylighting and lighting performance in various space types. The virtual lighting simulator consists of a web-based interface that allows navigation through a large database of images and data, which were generated through parametric lighting simulations. At its current form, the virtual lighting simulator has two main modules, one for daylighting and one for electric lighting. The daylighting module includes images and data for a small office space, varying most key daylighting parameters, such as window size and orientation, glazing type, surface reflectance, sky conditions, time of the year, etc. The electric lighting module includes images and data for five space types (classroom, small office, large open office, warehouse and small retail), varying key lighting parameters, such as the electric lighting system, surface reflectance, dimming/switching, etc. The computed images include perspectives and plans and are displayed in various formats to support qualitative as well as quantitative assessment. The quantitative information is in the form of iso-contour lines superimposed on the images, as well as false color images and statistical information on work plane illuminance. The qualitative information includes images that are adjusted to account for the sensitivity and adaptation of the human eye. The paper also includes a section on the major technical issues and their resolution.
Papamichael, Konstantinos; Lai, Judy; Fuller, Daniel; Tariq, Tara
Recent Developments in Virtual Reality Based Education
A series of virtual reality based educational modules are being developed to explore the capabilities of this emerging technology, and to determine how and where virtual reality can provide the greatest benefits to engineering educators. The most advanced application, Vicher, has been significantly expanded and split into two modules. Student evaluations of a newly developed safety analysis module show great promise, but also the need for further development. Other modules being developed cover topics in atomic crystal structures, fluid flow characteristics, thermodynamic relationships, and four component azeotropic distillation. This paper will describe the latest developments in the ongoing investigation of virtual reality as an educational medium. INTRODUCTION AND BACKGROUND Engineering educators are making use of an increasing number of computer simulation packages to aid them in attaining their educational objectives 5,7,9,10. The reasons for doing so include the desire to reach students that have alternate learning styles 4,11, to provide experience based education 6, and to augment traditional laboratory facilities that are being stretched increasingly thin with growing enrollments 3.
John T. Bell; H. Scott Fogler
T-678: Red Hat Enterprise Virtualization Hypervisor VLAN Packet Processing
8: Red Hat Enterprise Virtualization Hypervisor VLAN Packet 8: Red Hat Enterprise Virtualization Hypervisor VLAN Packet Processing Flaw Lets Remote Users Deny Service T-678: Red Hat Enterprise Virtualization Hypervisor VLAN Packet Processing Flaw Lets Remote Users Deny Service July 28, 2011 - 3:47pm Addthis PROBLEM: A vulnerability was reported in Red Hat Enterprise Virtualization Hypervisor. A remote user can cause denial of service conditions. PLATFORM: Red Hat Enterprise Virtualization-hypervisor package. ABSTRACT: Red Hat Enterprise Virtualization Hypervisor VLAN Packet Processing Flaw Lets Remote Users Deny Service. reference LINKS: RHSA-2011:1090-1 SecurityTracker Alert ID: 1025853 CVE-2011-1576 RHBA-2011:1068-1,Hypervisor is based on KVM - Bug Fix Advisory IMPACT ASSESSMENT: Medium Discussion: A flaw was found that allowed napi_reuse_skb() to be called on VLAN
Best Practices for Engaging Virtual Training | Department of Energy
You are here You are here Home » Best Practices for Engaging Virtual Training Best Practices for Engaging Virtual Training Course Title: CCBP-Best Practices for Engaging Virtual Training Date: Online course Time: At your discretion Registration link: Best Practices for Engaging Virtual Training / http://www.trainingindustry.com/webinars/best-practices-for-engaging-virtual-training.aspx Course type: Recorded Webinar Course Location: N/A Course Description: Ensuring that virtual training is engaging and grabs the attention of the audience is crucial to the success of the program. Join us for this TrainingIndustry.com webinar, presented on the Adobe Connect platform, to hear Jacqueline Beck, a Master Trainer for Adobe, share her expertise and tips on best practices for engaging learners in the
Why give away something for nothing? Investigating virtual goods pricing and permission strategies
With the rapid increase of virtual goods created for virtual world exchanges and the record growth of user-to-user transactions in these in-world economies, an important question is how a creator sets prices for a virtual good so as to maximize her profit ... Keywords: Virtual worlds, digital goods, permissions, pricing strategy, virtual goods
Sulin Ba; Dan Ke; Jan Stallaert; Zhongju Zhang
Using a dance pad to navigate through the virtual heritage environment of macquarie lighthouse, Sydney
In this paper we look at the potential of a novel navigational interface, a dance pad, to allow users to intuitively explore a virtual heritage environment. An immersive Virtual Reality environment has been created to learn about the historical background ... Keywords: USB dance pad, alternative HCI input devices, virtual heritage, virtual reality, virtual-immersive environments
Eric Fassbender; Debbie Richards
Theoretical and Practical Aspects of Conducting Meetings and Events in Virtual Worlds
Whether businesses will make use of virtual worlds for meetings, training, and events is not just an academic question. Use of existing and newly developed virtual worlds is expected to grow for the near future. International companies are entering a ... Keywords: Collaborative Meetings, Second Life, Virtual Business Applications, Virtual Meetings and Events, Virtual Worlds
Arhlene A. Flowers; Kimberly Gregson
Virtual Power Plant Simulation and Control Scheme Design.
?? Virtual Power Plant (VPP) is a concept that aggregate Distributed Energy Resources (DER) together, aims to overcome the capacity limits of single DER and� (more)
Chen, Zhenwei
Virtual Office Community and Computing Lab | ornl.gov
effective tool with our industry and university partners and we look forward to other DOE energy science organizations becoming members of this virtual collaboration framework",...
Experts To Examine Virtual Enterprise Uses of Info Tech
Experts To Examine Virtual Enterprise Uses of Info Tech. ... tools and technology can be used in consort ... its 5.7 working group on the use of computer ...
Protection of Data in Virtual and Physical Computing Environments
Protection of Data in Virtual and Physical Computing Environments Note: The technology described above is an early stage opportunity. Licensing rights to this ...
CyclePad: an articulate virtual laboratory for engineering thermodynamics
Keywords: AI and education, cased-based coaching, compositional modeling, engineering thermodynamics, functional reasoning, intelligent learning environments, qualitative reasoning, virtual laboratories
Kenneth D. Forbus; Sven E. Kuehne; Peter B. Whalley; John O. Everett; Leo Ureel; Mike Brokowski; Julie Baher
Step Inside the Cyberworld of a Virtual Reality Steel Mill
Although virtual reality displays are frequently seen at computer trade shows, Tippins is the first to incorporate it into the steel manufacturing industry, said�...
Virtual Screening of Materials for Gaseous Fuel Storage
Presentation Title, Virtual Screening of Materials for Gaseous Fuel Storage .... Numerical Study on Behavior of Top-Blown Supersonic Jets and Their Interaction �...
Advanced Virtual Energy Simulation Training And Research (AVESTAR...
Gasifier Optimization and Plant Supporting Systems Advanced Virtual Energy Simulation Training And Research (AVESTAR(tm)) Facility NETL Office of Research and Development Project...
Towards IQ-Appliances: Quality-awareness in Information Virtualization .
??Our research addresses two important problems that arise in modern large-scale distributed systems: 1. The necessity to virtualize their data flows by applying actions such� (more)
Niranjan Mysore, Radhika
PNNL offers 'virtual tour' of Shallow Underground Laboratory...
PNNL offers 'virtual tour' of Shallow Underground Laboratory | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the...
Virtual environments for nuclear power plant design
In the design and operation of nuclear power plants, the visualization process inherent in virtual environments (VE) allows for abstract design concepts to be made concrete and simulated without using a physical mock-up. This helps reduce the time and effort required to design and understand the system, thus providing the design team with a less complicated arrangement. Also, the outcome of human interactions with the components and system can be minimized through various testing of scenarios in real-time without the threat of injury to the user or damage to the equipment. If implemented, this will lead to a minimal total design and construction effort for nuclear power plants (NPP).
Brown-VanHoozer, S.A.; Singleterry, R.C. Jr.; King, R.W. [and others
Virtual Divestitures, Will They Make A Difference?: Cournot Competition, Options Markets and Efficiency
of such a divestiture of Virtual Power Plants (VPPs), andand physical Virtual Power Plants. The second goal (sectionFabra (2004). Virtual Power Plants In this new philosophy of
Willems, Bert
Proceedings of the 2007 ACM symposium on Virtual reality software and technology
ACM Symposium on Virtual Reality Software and Technology (VRST) is an eminent forum for dissemination of the latest research results in virtual reality. The goal of this symposium is to provide an opportunity for researchers in virtual reality and applications ...
Aditi Majumder; Larry Hodges; Daniel Cohen-Or; Stephen N. Spencer
Research Commentary---Virtual Worlds: A Performative Perspective on Globally Distributed, Immersive Work
Virtual worlds are immersive, simulated, persistent, and dynamic environments that include rich graphical three dimensional spaces, high fidelity audio, motion, viewpoint, and interactivity. Initially dismissed as environments of play, virtual worlds ... Keywords: boundaries, identity, performativity, presence, virtual worlds
Ulrike Schultze; Wanda J. Orlikowski
Relevant measurements for polyps in 3D virtual colonoscopy
Virtual Colonoscopy is an innovative method to discover colon neoplasias created in order to alleviate patients aches generated by the standard colonoscopy. For the same reason, we have realized an automatic process finalized to find polyps into the ... Keywords: CT colonography, image processing, polyp distance, rendering, segmentation, skeletonization, virtual colonoscopy
Vitoantonio Bevilacqua; Marianna Notarnicola; Marco Cortellino; Antonio Scarpa; Diego Taurino; Giuseppe Mastronardi
Evolution of vision capabilities in embodied virtual creatures
We evolve light following behaviours in virtual creatures through neural network training using an incremental evolution approach. The neural controllers of creatures evolved for movement are augmented with simple visual neurons and neural connections. ... Keywords: artificial life, evolution, genetic algorithms, learning, virtual creatures, vision
Marcin L. Pilat; Christian Jacob
Personal varrier: autostereoscopic virtual reality display for distributed scientific visualization
As scientific data sets increase in size, dimensionality, and complexity, new high resolution, interactive, collaborative networked display systems are required to view them in real-time. Increasingly, the principles of virtual reality (VR) are being ... Keywords: 3D display, autostereo, autostereoscopy, camera-based tracking, parallax barrier, personal varrier, varrier, virtual reality
Tom Peterka; Daniel J. Sandin; Jinghua Ge; Javier Girado; Robert Kooima; Jason Leigh; Andrew Johnson; Marcus Thiebaux; Thomas A. DeFanti
Transcranial Doppler: A Tool for Augmented Cognition in Virtual Environments
In this work, we propose the use of Transcranial Doppler Monitoring (TCD) as a tool to measure brain activity during the exposure to virtual environments (VE) that can be used in Augmented Cognition (AugCog) systems. The technique is non-invasive, and ... Keywords: Augmented Cognition, Cognitive State Assessment, Neurophysiological Data, Transcranial Doppler, Virtual Reality
Beatriz Rey; Mariano Alca�iz; Valery Naranjo; Jose Tembl; Vera Parkhutik
The VarrierTM autostereoscopic virtual reality display
Virtual reality (VR) has long been hampered by the gear needed to make the experience possible; specifically, stereo glasses and tracking devices. Autostereoscopic display devices are gaining popularity by freeing the user from stereo glasses, however ... Keywords: 3D display, autostereoscopic display, camera-based tracking, parallax barrier, varrier, virtual reality
Daniel J. Sandin; Todd Margolis; Jinghua Ge; Javier Girado; Tom Peterka; Thomas A. DeFanti
From Virtual Organization to E-Business: Transformational Structuration
This article shows how the technical hype of 1990s has been transformed into the e-business organizations at the beginning of the 21st century. The authors took an interpretive stance in this study, grounded theory, and investigated the ontology of virtual ... Keywords: E-Business, Flexible Domination, Grounded Theory, Metaphors, Structuration Theory, Transformational Structuration, Virtualization
Pairin Katerattanakul; Ben B. Kim; James J. Lee; Bandula Jayatilaka; Ted E. Lee; Soongoo Hong
Developing Virtual Reality Applications: Foundations of Effective Design
Virtual Reality systems enable organizations to cut costs and time, maintain financial and organizational control over the development process, digitally evaluate products before having them created, and allow for greater creative exploration. In this ... Keywords: Computer Graphics, User Interfaces, Virtual Reality
Alan Craig; William R. Sherman; Jeffrey D. Will
Shifting GEARS to enable guest-context virtual services
We argue that the implementation of VMM-based virtual services for a guest should extend into the guest itself, even without its cooperation. Placing service components directly into the guest OS or application can reduce implementation complexity and ... Keywords: code transformation, services, virtual machines
Kyle C. Hale; Lei Xia; Peter A. Dinda
A flexible service selection for executing virtual services
With the adoption of a service-oriented paradigm on the Web, many software services are likely to fulfil similar functional needs for end-users. We propose to aggregate functionally equivalent software services within one single virtual service, that ... Keywords: marketplace, service aggregation, service discovery, service selection, service selector, virtual service
Nassim Laga; Emmanuel Bertin; Noel Crespi; Ivan Bedini; Benjamin Molina; Zhenzhen Zhao
Exploring Power-Efficient Provisioning for Online Virtual Network Requests
In the paradigm of cloud computing, multiple users can share the cloud infrastructure resources. The application or service requests from a user can be abstracted as a virtual network (VN) request and submitted to the cloud-based data centers. How to ... Keywords: power efficien, provisioning, virtual network request, embedding, datacenters
Gang Sun, Hongfang Yu, Vishal Anand, Dan Liao, Lemin Li
Ideal, real and virtual textile structure modelling and visualization
Usually the software for textile visualization uses ideal model based on simplified structure assumptions that may not be in a good agreement with reality. Real model reconstructs a small volume of structure from 2D parallel cuts. Proposed virtual model ... Keywords: FFT, OpenGL, VRML, image processing, virtual reality
Miloslav Kosek; Tomas Mikolanda; Bohumila Koskova
Plug-in-hybrid electric vehicles park as virtual DVR
Plug-in-hybrid electric vehicles park as virtual DVR F.R. Islam and H.R. Pota Dynamic voltage in a real-life low voltage power system. Hybrid-electric power technologies and advances in batteries make electric vehicle (PHEV) batteries and their bidirectional charger in a charging station as virtual dynamic
Pota, Himanshu Roy
Review: The evolution of virtual fences: A review
A virtual fence can be defined as a structure serving as an enclosure, a barrier, or a boundary without a physical barrier. The concept of virtual fencing occurs increasingly in discussions wherever free-ranging livestock is managed. It is especially ... Keywords: Animal welfare, Fence injury, Global positioning system, Learning behaviour, Nature conservation, Remote gathering
Christina Umstatter
Going to town: Visualized perspectives and navigation through virtual environments
Two experiments examined how spatial learning perspectives support navigation through virtual urban environments. Participants briefly learned the overall layout of a virtual desktop environment, and then were taken on a simulated journey ending at a ... Keywords: Navigation, Spatial cognition, Spatial perspectives, Spatial visualizations
Tad T. Bruny�; Aaron Gardony; Caroline R. Mahoney; Holly A. Taylor
Back to the Holodeck: new life for virtual reality?
This paper examines the gap between optimistic 1990s predictions of "immersive" Virtual Reality and the fact that these systems are not in widespread use today (2007). In particular, Janet Murray's 1997 adoption of the science fiction device "The Holodeck" ... Keywords: augmented reality, desktop VR, experience, holodeck, immersion, peak oil, technology, virtual reality
Andrew Hutchison
A fault-tolerant strategy for virtualized HPC clusters
Virtualization is a common strategy for improving the utilization of existing computing resources, particularly within data centers. However, its use for high performance computing (HPC) applications is currently limited despite its potential for both ... Keywords: Benchmark, Checkpointing, Fault-tolerance, MPI, Virtualization
John Paul Walters; Vipin Chaudhary
Human computer interaction with hand gestures in virtual environment
With the ever increasing and flourishing phenomena of growth in virtual environments based upon computer systems; demands for new kind of interaction devices have emerged. The present used devices like keyboard, mouse and pen are cumbrousome within these ... Keywords: hand gestures, human computer interaction, virtual environment
Siddharth S. Rautaray; Anand Kumar; Anupam Agrawal
Virtual reality training applications for the mining industry
Virtual reality is a rapidly growing technology which utilises the ever-increasing power of computers to simulate real-world and imaginary environments and situations with a high degree of realism and interactiveness. Safety in the South African mining ... Keywords: mining training applications, realism, safety training, virtual reality
Etienne van Wyk; Ruth de Villiers
An empirical investigation of virtual Interaction in supporting learning
This research investigates "virtual interaction," a special type of interaction between a learner and a rich media representation of an instructor. Guided by the Technology Mediated Learning (TML) research framework, the research investigates the impacts ... Keywords: e-learning, question answering, technology mediated learning (TML), virtual interaction
Jinwei Cao; Janna M. Crews; Ming Lin; Judee K. Burgoon; Jay F. Nunamaker, Jr.
Leadership Constraints: Leading Global Virtual Teams Through Environmental Complexity
This research focused on the question: What leadership constraints contribute to the complexity of the working environment faced by global virtual team leaders and how do those leadership constraints impact the behavior of leaders when they are trying ... Keywords: Computer Mediated Communication, Constraints, Global Virtual Team, Leadership, Telework
Leslie C. Tworoger, Cynthia P. Ruppel, Baiyun Gong, Randolph A. Pohlman
A real-time virtual machine implementation for small microcontrollers
A way to host a full general purpose virtual machine (VM) interpreter on a very small microcontroller platform is described. This machine provides a comprehensive set of general and enhanced functionality efficiently by abstracting the VM instruction ... Keywords: Microcontrollers, Real-time systems, Virtual machine
W. Roger Davis; Phillip A. Laplante; Bo I. Sand�n
A Virtual Reality Patient and Environments for Image Guided Diagnosis
We describe a real-time virtual reality platform and a novel visualization technique designed to deliver constant rendering speed of highly detailed anatomical structures at interactive rates using portable, and low-cost computers. Our solution represents ... Keywords: Anatomical Guidance, Augmented Reality, FAST Exam, Virtual Human Interface
Barnabas Takacs; David Hanak; Kirby G. Voshburg
Education---Oriented Virtual Environment for Clothing Thermal Functional Performance
This paper presents a simulation environment for the education of clothing thermal function. It allows learners in a virtual environment to learn the clothing thermal comfort theory and identify the most important factors that influence clothing thermal ... Keywords: Visualization, clothing thermal functional performance, education oriented, virtual environment
Xiaonan Luo; Wenbang Hou; Yi Li
Cells: A Self-Hosting Virtual Infrastructure Service
We describe the design and implementation of Cells, a novel multi-tenanted virtual infrastructure service. Cells has the unique property of being self-hosting: it operates its own management system within one of the tenant virtual infrastructures that ... Keywords: cloud computing, infrastructure as a service
Alistair Coles; Eric Deliot; Aled Edwards; Anna Fischer; Patrick Goldsack; Julio Guijarro; Rycharde Hawkes; Johannes Kirschnick; Steve Loughran; Paul Murray; Lawrence Wilcock
Reviren: augmenting virtual environments with personal digital assistants
Our research group is currently embarked on building cheap display-based virtual environments. With the use of Personal Digital Assistants becoming more widespread and commonplace, there is a need to investigate ways of allowing them to integrate better ... Keywords: design, dynamic interface, human factors, mobile interface, virtual environment control
Richard Schroder; Marc Bosma; Andrew Cousins; Gary Marsden
Virtualisation: An overview of the best known virtual solutions
Our overview of virtual solutions will begin with the numerous available open source options. Xen is one of those currently attracting the most attention, thanks to its performance and zero cost. The Xen virtual machine component is part of the kernel, ...
Dario Forte
Virtual International Research/Education Center: Energy Saving LEDs
This paper presents an establish and operation of energy saving LEDs virtual international research/education center. This is a long-term international engineering education and research collaboration program among California Polytechnic State University ... Keywords: Virtual, research/education center, LEDs
Xiaomin Jin, Xiao-Hua Yu, Xiang-Ning Kang, Guo-Yi Zhang, Guifang Dong
On the classification and management of Virtual Organisation Breeding Environments
Wide variety of domains and applications have identified the need for collaboration among heterogeneous, autonomous and geographically disperse organisations. Virtual Organisations (VOs) represent a main form of network for goal-oriented ... Keywords: VBE challenges, VBE competency management, VBE management, VBE trust management, breeding environments, collaboration, collaborative networks, information management, information technology, technology management, virtual organisations
Hamideh Afsarmanesh; Luis M. Camarinha-Matos
Emotional and aesthetic factors of virtual mobile learning environments
This paper discusses the theoretical starting points and design considerations for addressing the emotional and aesthetic aspects of Virtual Learning Environments (VLEs) in support of ubiquitous teaching, studying and learning. It is asserted ... Keywords: VLEs, aesthetics, communication, emotions, learning regulation, mobile learning, network-based learning, psychosocial regulation, ubiquitous learning, ubiquitous studying, virtual learning environments
Tom Page; Marian Hepburn; Miika Lehtonen; Gisli Thorsteinsson; Subramanian Arunachalam
Editing, reviewing, and anti-plagiarism policies for virtual environments
Both traditional and virtual environments face the plague of plagiarism and are confronted with decreasing attention to perfecting original research and study skills. Among all, e-sources seem most exposed and tempting for the ones who seek an easy way ... Keywords: citation, copyright laws, editing and reviewing for virtual environments, plagiarism
Suzana Carmen Cismas
Magnetic Fields from Electrical Appliances and Devices
A major emphasis of research addressing potential health effects associated with power-frequency magnetic fields has been on assessing exposure to magnetic fields attributable to loads and their associated ground currents flowing on electrical transmission and distribution systems. Though these exposures can vary widely both over time and among residences, they are nonetheless present virtually all of the time. These exposures have remained a focus of attention for the scientific community largely becaus...
Approved for public release; distribution is unlimited.
a complete molecular level understanding of the chemistry and physics of living systems and astounding approaches to energy sufficiency are considered along with the potential of biological systems for providing increasingly toward the goal of understanding complete molecular networks in living systems. Understanding
of the scientific Literature As it Pertains To Gulf War Illnesses, Vol 7 Depleted Uranium, MR-1018/7-OSD, 1999, RAND. Depleted Uranium in Balkan Residents. Report prepared for D.MacLeod of BBC Scotland by : Prof. NL'URANIUM ET LES ARMES �? L'URANIUM APPAUVRI. Pierre Roussel* Institut de Physique Nucléaire, CNRS
and target. Hard targets include clandestine drug manufacturing facilities, terrorist #12;strongholds group. Large populations of micrites could be introduced into hard targets, carrying in exotic taggant
Beam discharge excited by distributed virtual cathode
A new type of beam discharge, i.e., beam discharge with a distributed virtual cathode (VC) is proposed and considered by numerical simulation. The discharge is established during counter motion of high-current electron beams in a gas-filled equipotential cavity and is characterized by a state of hot dense electron plasma of primary electrons. The discharge temporal dynamics is studied. It is shown that the VC lifetime depends linearly from this sum in a wide range of the sum of beam currents, from the boundary current of two-beam instability to the critical current of Pierce instability. Generation of nonlinear electrostatic structures shaped as phase bubbles in the discharge is detected, and their dynamics is studied. The parameters are determined, at which the multiple coexistence of phase bubbles and their coalescence during collisions is observed.
Barabanov, V. N.; Dubinov, A. E.; Loiko, M. V.; Saikov, S. K.; Selemir, V. D. [All-Russia Research Institute of Experimental Physics, Russian Federal Nuclear Center (Russian Federation); Tarakanov, V. P. [Russian Academy of Sciences, Joint Institute for High Temperatures (Russian Federation)
Unitary constraints on Deeply Virtual Compton Scattering
At moderately low momentum transfer ($-t$ up to 1 GeV$^2$) the coupling to the vector meson production channels gives the dominant contribution to real Compton and deeply virtual Compton scattering (DVCS). Starting from a Regge Pole approach that successfully describes vector meson production, the singular part of the corresponding box diagrams (where the intermediate vector meson-baryon pair propagates on-shell) is evaluated without any further assumptions (unitarity). Such a treatment explains not only the unexpectedly large DVCS unpolarized cross section that has been recently measured at Jefferson Laboratory (JLab), but also all the beam spin and charge asymmetries that has been measured at JLab and Hermes, without explicit need of Generalized Parton Distributions (GPD). The issue of the relationship between the two approaches is addressed.
J.M. Laget
EULER - A Real Virtual Library for Mathematics
The EULER project completed its work in November 2002. It forms the last part of a very successful project in the specialized but global discipline of mathematics. After a successful RTD project had created the technology, a take-up project has effectively exploited it to the point where its future is assured through a not-for-profit consortium. EULER is a European based, world class, real virtual library for mathematics with up-to-date technological solutions, well accepted by users. In particular, EULER provides a world reference and delivery service, transparent to the end user and offering full coverage of the mathematics literature world-wide, including bibliographic data, peer reviews and/or abstracts, indexing, classification and search, transparent access to library services, co-operation with commercial information providers (publishers, bookstores). The EULER services provide a gateway to the electronic catalogues and repositories of participating institutions, while the latter retain complete respo...
Jost, Michael
A web-based approach to image-based lighting using high dynamic range images and QuickTime object virtual reality
This thesis presents a web-based approach to lighting three-dimensional geometry in a virtual scene. The use of High Dynamic Range (HDR) images for the lighting model makes it possible to convey a greater sense of photorealism than can be provided with a conventional computer generated three-point lighting setup. The use of QuickTime � Object Virtual Reality to display the three-dimensional geometry offers a sophisticated user experience and a convenient method for viewing virtual objects over the web. With this work, I generate original High Dynamic Range images for the purpose of image-based lighting and use the QuickTime � Object Virtual Reality framework to creatively alter the paradigm of object VR for use in object lighting. The result is two scenarios: one that allows for the virtual manipulation of an object within a lit scene, and another with the virtual manipulation of light around a static object. Future work might include the animation of High Dynamic Range image-based lighting, with emphasis on such features as depth of field and glare generation.
Cuellar, Tamara Melissa
Six virtual inches to the left: The problem with IPng
This memo describes an Internet information track protocol for the Internet community. It proposes that a locator address (TA) be assigned to Transmission Control Protocol (TCP). The purpose of this TA is to uniquely identify an Internet node without specifing any routing information. This new version of TCP would contain support for high bandwidth-delay networks. Support for multiple network layer (Internet Protocol) protocols is also possible with this new TCP. Distribution of this document is unlimited. This RFC suggests that a new version of TCP be developed (TCPv11) and deployed. This version of TCP would contain a globally unique transport protocol address (TA). Assiging an address to TCP would allow for the support of multiple network layer protocols (IPng`s). The Ta would identify the location of an Internet node. The IPng layer would provide routing information to the Internet. Seperating the location and routing functions will greatly increase the versitily of the Internet.
Carlson, R. [Argonne National Lab., IL (United States); Ficarella, D. [Motorola (United States)
Data Protection and Rapid Recovery From Attack With A Virtual Private File Server and Virtual Machine Appliances
When a personal computer is attacked, both personal data like digital photos and system configuration information like installed programs can be lost. To protect personal data, we house it in a file server virtual machine running on the same physical host and export it to other virtual machines running on the same host. We implement this private file server virtual machine using a modified version of an NFS server installed in a virtual machine under various virtualization environments such as Xen and VMware. We also demonstrate that by placing the user�s applications in a virtual machine rather than directly on the base machine we can provide near instant recovery of system configuration information. We quantify the costs of this architecture by comparing benchmarks running directly on a base operating system and accessing data in a local filesystem to those running in a guest operating system and accessing data in an NFS partition mounted from a file server virtual machine. We find that for Xen the overhead of read intensive workloads is at most 5 % and for write intensive workloads the overhead is at most 24%. For system benchmarks that stress CPU and memory performance, we see no noticeable degradation.
Jeanna N. Matthews; Jason J. Herne; Todd M. Deshane; Patty A. Jablonski; Leslie R. Cherian; Mike T. Mccabe
Tangible authoring of 3D virtual scenes in dynamic augmented reality environment
This paper proposes tangible interfaces and interactions for authoring 3D virtual and immersive scenes easily and intuitively in tangible augmented reality (AR) environment. It provides tangible interfaces for manipulating virtual objects in a natural ... Keywords: Augmented reality, RFID, Tangible interface, Virtual reality, Virtual studio
Jae Yeol Lee; Dong Woo Seo; Gue Won Rhee
Evaluation of the sense of presence and immersion in virtual rehabilitation: influence of user movement feedback
Virtual Rehabilitation has undergone enormous development in recent years. Most existing Virtual Rehabilitation Systems include a tracking system to provide users with feedback of their movements, allowing them to interact with the virtual environment. ... Keywords: human computer interaction, immersion, presence, tracking, virtual rehabilitation
Sergio Albiol-P�rez; Jos�-Antonio Gil-G�mez; Mariano Alca�iz; Habib Moussa Fardoun
Chicken Killers or Bandwidth Patriots?: A Case Study of Ethics in Virtual Reality
In 2008, a resident of a computerized virtual world called "Second Life" programmed and began selling a "realistic" virtual chicken. It required food and water to survive, was vulnerable to physical damage, and could reproduce. This development led to ... Keywords: Cyberspace, Ethics, Just War, Resource Dilemma, Virtual Reality, Virtual Worlds
Kurt Reymers
Evolution of a virtual community: understanding design issues through a longitudinal study
Keywords: Internet, computer mediated communication, evolutionary design, information systems design, longitudinal study, participative design, virtual communities
Arvind Malhotra; Sanjay Gosain; Alexander Hars
Let's keep in touch online: a Facebook aware virtual human interface
A virtual human is an effective interface for interacting with users and plays an important role in carrying out certain tasks. As social networking sites are getting more and more popular, we propose a Facebook aware virtual human. The social networking ... Keywords: Dialogue, Human-virtual human interaction, Social networking sites, Virtual humans
Gengdai Liu; Shantanu Choudhary; Juzheng Zhang; Nadia Magenenat-Thalmann
A location-aware virtual character in a smart room: effects on performance, presence and adaptivity
Location-aware ambient environments are relevant in designing interactive virtual characters. However, they raise several questions about spatial behaviors to be displayed by virtual characters, and about the perception of virtual characters by users. ... Keywords: adaptive agents, ambient interaction, experimental studies, interactive virtual agent, multimodal user interfaces, spatial behaviors
Ning Tan; Ga�tan Pruvost; Matthieu Courgeon; C�line Clavel; Yacine Bellik; Jean-Claude Martin
Virtual item sales as a revenue model: identifying attributes that drive purchase decisions
The global market for virtual items, characters and currencies was estimated to exceed 2.1 Billion USD in 2007. Selling virtual goods for real money is an increasingly common revenue model not only for online games and virtual worlds, but for social ... Keywords: Business model, Consumer behaviour, Online communities, Purchase drivers, RMT, Virtual consumption
Vili Lehdonvirta
Categorisation of data management solutions for heterogeneous data in collaborative virtual engineering
Computer based virtual development is the basis of product engineering, called virtual engineering. The increasing demand of virtual engineering solutions for new domains and companies leads to a huge width of approaches in this area. To enhance the ... Keywords: PDM, PLM, collaboration, data management, exchange, integration, virtual engineering
Stephan Vornholt; Ingolf Geist; Yuexiao Li
NETL: Gasification Systems - Advanced Virtual Energy Simulation Training
Advanced Virtual Energy Simulation Training And Research (AVESTAR(tm)) Facility Advanced Virtual Energy Simulation Training And Research (AVESTAR(tm)) Facility Project No: Adv Gas-FY131415 Task 6 Developed as a part of NETL's initiative to advance new clean coal technology, the Advanced Virtual Energy Simulation Training And Research (AVESTARTM) Center is focused on training engineers and energy plant operators in the efficient, productive, and safe operation of highly efficient power generation systems that also protect the environment. Comprehensive dynamic simulator-based instruction better prepares operators and engineers to manage advanced energy plants according to economic constraints while minimizing or avoiding the impact of any potentially harmful, wasteful, or inefficient events. Advanced Virtual Energy Simulation Training and Research Center - AVESTAR
Building Energy Software Tools Directory: IES Virtual Environment
IES Virtual Environment IES Virtual Environment IES Virtual Environment Logo The IES Virtual Environment (IESVE) is a powerful, in-depth suite of building performance analysis tools. It allows the design and operation of comfortable buildings that consume significantly less energy. Whether working on a new build or renovation project, the VE allows designers to test different options, identify best passive solutions, compare low-carbon & renewable technologies, and draw conclusions on energy use, CO2 emissions, occupant comfort, and much more. There are various tools in the suite; each designed to provide sustainable analysis at levels suitable for different design team members and design stages. All utilise our Apache dynamic thermal simulation engine, and an integrated central data model, which has direct links to SketchUp,
Constructing battery-aware virtual backbones in wireless sensor networks
A critical issue in battery-powered sensor networks is to construct energy efficient virtual backbones for network routing. Recent study in battery technology reveals that batteries tend to discharge more power than needed and reimburse the overdischarged ...
Chi Ma; Yuanyuan Yang; Zhenghao Zhang
From physical to virtual : extending the gallery experience online
This thesis is an exploration of the ways in which interactive features in the virtual space can be developed to complement physical museum exhibitions, as well as create opportunities for museums to reach broader audiences. ...
Ho, Moneta Kwok-Ching, 1976-
Hadley Cell Dynamics in a Virtually Dry Snowball Earth Atmosphere
The Hadley cell of a virtually dry snowball Earth atmosphere under equinox insolation is studied in a comprehensive atmospheric general circulation model. In contrast to the Hadley cell of modern Earth, momentum transport by dry convection, which ...
Aiko Voigt; Isaac M. Held; Jochem Marotzke
Analysing virtual organisation risk sources: an analytical network process approach
SMEs have to collaborate with other enterprises in a virtual organisation (VO) forms to cope with an increasingly dynamic and competitive environment. Despite the increased interest in the area of collaboration information is still lacking about the ...
Mohammad Alawamleh; Keith Popplewell
Computational Engineering on the Grid: Crafting a Distributed Virtual Reactor
This paper reports on our research into supporting collaborative distributed applications on the Grid. Our case study application, a Virtual Reactor problem solving environment, was built for simulation of industrially important technology of plasma ...
V. V. Krzhizhanovskaya; V. V. Korkhov; A. Tirado-Ramos; D. J. Groen; I. V. Shoshmina; I. A. Valuev; I. V. Morozov; N. V. Malyshkin; Y. E. Gorbachev; P. M. A. Sloot
The Heavy Ion Fusion Science Virtual National Laboratory
Slide 1 The Heavy Ion Fusion Science Virtual National Laboratory Python in a Parallel Environment Dave Grote - LLNL & LBNL NUG2013 User Day Wednesday, February 15, 2013 Slide 2 The...
Resilient hosting in a continuously available virtualized environment
In this paper, we describe continuously available services and application hosting on the Events/IBM.com� Infrastructure (EI)-a continuously available virtualized environment based on three active data centers that has demonstrated 100-percent availability ...
R R. Scadden; R J. Bogdany; J. W. Clifford; H. D. Pearthree; R. A. Locke
Optimal operation of a virtual power plant with risk management
In the evolving smart power systems (or smart grids), distributed generators (DG) and virtual power plants (VPP) have major roles in providing electric energy for microgrids. This paper studies the optimal operation of a VPP in a microgrid considering ...
H. Taheri; A. Rahimi-Kian; H. Ghasemi; B. Alizadeh
A case for high performance computing with virtual machines
Virtual machine (VM) technologies are experiencing a resurgence in both industry and research communities. VMs offer many desirable features such as security, ease of management, OS customization, performance isolation, check-pointing, and migration, ...
Wei Huang; Jiuxing Liu; Bulent Abali; Dhabaleswar K. Panda
Architectural support for secure virtualization under a vulnerable hypervisor
Although cloud computing has emerged as a promising future computing model, security concerns due to malicious tenants have been deterring its fast adoption. In cloud computing, multiple tenants may share physical systems by using virtualization techniques. ...
Seongwook Jin; Jeongseob Ahn; Sanghoon Cha; Jaehyuk Huh
Towards a scalable and flexible architecture for virtual private networks
Virtual Private Networks (VPNs) are commonly used to provide secure connectivity over public networks. VPNs use tunnels to provide encryption, compression, and authentication functions, which are identically applied to every packet passing through them. ...
Shashank Khanvilkar; Ashfaq Khokhar
Virtual Model Control of a Biped Walking Robot
The transformation from high level task specification to low level motion control is a fundamental issue in sensorimotor control in animals and robots. This thesis develops a control scheme called virtual model control ...
Pratt, Jerry E.
VPM tokens: virtual machine-aware power budgeting in datacenters
Power consumption and cooling overheads are becoming increasingly significant for enterprise datacenters, affecting overall costs and the ability to extend resource capacities. To help mitigate these issues, active power management technologies are being ... Keywords: Power management, Virtualization
Ripal Nathuji; Karsten Schwan; Ankit Somani; Yogendra Joshi
High fidelity sensor simulations for the virtual autonomous navigation environment
The Virtual Autonomous Navigation Environment (VANE) is a high-fidelity simulation environment for ground robotics. Physicsbased realism is the primary goal of the VANE. The VANE simulation incorporates realistic lighting, vehicle-terrain interaction, ...
Chris Goodin; Phillip J. Durst; Burhman Gates; Chris Cummins; Jody Priddy
A review of using virtual reality for learning
The major concern of educators is how to enhance the outcome of education. Better education media used to assist teaching has constantly been sought by researchers in the educational technology domain. Virtual Reality (VR) has been identified as one ...
Elinda Ai-Lim Lee; Kok Wai Wong
National Nuclear Security Administration (NNSA)
for the Comprehensive-Nuclear-Test Ban Treaty to basic science research such as the search for dark matter in the universe or neutrinoless double-beta decay. The virtual tour...
Towards reactive scheduling for large-scale virtual power plants
Concerning distributed energy management, virtual power plants are a frequently discussed topic. Although there are several different approaches to the coordination of distributed energy resources in this context, the inherent dynamics of this complex ...
Martin Tr�schel; Hans-J�rgen Appelrath
Incorporating Quality-of-Service in the Virtual Interface Architecture
User-level Networking (ULN) is gaining rapid acceptance in the commercial world with Virtual Interface Architecture (VIA), and Infiniband more recently, being touted as the interface of choice to diverse peripherals. There is an important issue with ...
Shailabh Nagar; Chun Liu; Gokul B. Kandiraju; Anand Sivasubramaniam; N. Gautam
On using virtual circuits for GridFTP transfers
The goal of this work is to characterize scientific data transfers and to determine the suitability of dynamic virtual circuit service for these transfers instead of the currently used IP-routed service. Specifically, logs collected by servers executing ...
Z. Liu, M. Veeraraghavan, Z. Yan, C. Tracy, J. Tie, I. Foster, J. Dennis, J. Hick, Y. Li, W. Yang
A virtual channel technique for supporting P2P streaming
Nowadays, some powerful client devices, e.g., smart phone, set top boxes and digital video recorders, are commonly used to enhance digital TV broadcasting services. This paper proposes a virtual channel platform by organizing these client devices to ...
Jau-Wu Huang; Nien-Chen Lin; Kai-Chao Yang; Chen-Lung Chan; Jia-Shung Wang
Enforcing performance isolation across virtual machines in xen
Virtual machines (VMs) have recently emerged as the basis for allocating resources in enterprise settings and hosting centers. One benefit of VMs in these environments is the ability to multiplex several operating systems on hardware based on dynamically ...
Diwaker Gupta; Ludmila Cherkasova; Rob Gardner; Amin Vahdat
A Framework for IP Based Virtual Private Networks
This document describes a framework for Virtual Private Networks (VPNs) running across IP backbones. It discusses the various different types of VPNs, their respective requirements, and proposes specific mechanisms that could be used to implement each ...
B. Gleeson; A. Lin; J. Heinanen; G. Armitage; A. Malis
A tangible interface for a virtual reality presentation and design
It is important for city planning projects and large-scale building construction to involve stakeholders and feedback their opinion to the project. This thesis introduces a Tangible Interface for Virtual Reality Presentation ...
Oishi, Jun, 1966-
Traffic condition tracking and visualization in virtual city testbed
Computer traffic simulation is a tool widely used to understand how humans behave under varying traffic conditions. The Virtual City Testbed is a traffic simulation framework built to closely model human behavior by allowing ...
Zhu, Boyuan, M. Eng. Massachusetts Institute of Technology
Using Virtual Worlds to Explore Electric Power Grids and Plants
We present the design and implementation of two virtual worlds -- a QuickTime VR model of a power plant and a VRML model of a power grid -- to be used in electric power systems courses. These educational aids provide an economical and accessible way to help students relate and differentiate the mathematical description of a device and its actual appearance. The paper also briefly describes the technologies behind these virtual worlds and their deployment via the World Wide Web.
Agust�n A. Irizarry-rivera; Manuel A. P�rez-Quiones; Rudolph P. Darken
Virtual environmental applications for buried waste characterization technology evaluation report
The project, Virtual Environment Applications for Buried Waste Characterization, was initiated in the Buried Waste Integrated Demonstration Program in fiscal year 1994. This project is a research and development effort that supports the remediation of buried waste by identifying and examining the issues, needs, and feasibility of creating virtual environments using available characterization and other data. This document describes the progress and results from this project during the past year.
U.S.-U.K. Collaboration on Virtual Plant Simulation
U.S.-U.K. Collaboration on U.S.-U.K. Collaboration on Virtual Plant Simulation Background Under the auspices of the U.S.-U.K. Memorandum of Understanding and Implementing Agreement for Fossil Energy Research and Technology Development, the U.S. Department of Energy's (DOE) National Energy Technology Laboratory (NETL) participated in a three-year collaboration on virtual plant simulation with a project team supported by the Department for Business, Enterprise & Regulatory Reform in
Structured Query Language for Virtual Observatory
Currently two query languages are defined as standards for the Virtual Observatory (VO). Astronomical Data Query Language (ADQL) is used for catalog data query and Simple Image Access Protocol (SIAP) is for image data query. As a result, when we query each data service, we need to know in advance which language is supported and then construct a query language accordingly. The construct of SIAP is simple, but they have a limited capability. For example, there is no way to specify multiple regions in one query, and it is difficult to specify complex query conditions. In this paper, we propose a unified query language for any kind of astronomical database on the basis of SQL99. SQL is a query language optimized for a table data, so to apply the SQL to the image and spectrum data set, the data structure need to be mapped to a table like structure. We present specification of this query language and an example of the architecture for the database system.
Yuji Shirasaki; Masatoshi Ohishi; Yoshihiko Mizumoto; Masahiro Tanaka; Satoshi Honda; Masafumi Oe; Naoki Yasuda; Yoshifumi Masunaga
Site remediation in a virtual environment
We describe the process used in combining an existing computer simulation with both Virtual Reality (VR) input and output devices, and conventional visualization tools, so as to make the simulation easier to use and the results easier to understand. VR input technology facilitates direct user manipulation of three dimensional simulation parameters. Commercially available visualization tools provide a flexible environment for representing abstract scientific data. VR output technology provides a more flexible and convincing way to view the visualization results than is afforded in contemporary visualization software. The desired goal of this process is a prototype system that minimizes man-machine interface barriers, as well as enhanced control over the simulation itself, so as to maximize the use of scientific judgement and intuition. In environmental remediation, the goal is to clean up contaminants either by removing them or rendering them non-toxic. A computer model simulates water or chemical flooding to mobilize and extract hydrocarbon contaminants from a volume of saturated soil/rock. Several wells are drilled in the vicinity of the contaminant, water and/or chemicals are injected into some of the wells, and fluid containing the mobilized hydrocarbons is pumped out of the remaining wells. The user is tasked with finding well locations and pumping rates that maximize recovery of the contaminants while minimizing drilling and pumping costs to clean up the site of interest.
Bethel, W.; Jacobsen, J.; Holland, P.
Generation IV Nuclear Energy Systems Construction Cost Reductions through the Use of Virtual Environments - Task 5 Report: Generation IV Reactor Virtual Mockup Proof-of-Principle Study
Task 5 report is part of a 3 year DOE NERI-sponsored effort evaluating immersive virtual reality (CAVE) technology for design review, construction planning, and maintenance planning and training for next generation nuclear power plants. Program covers development of full-scale virtual mockups generated from 3D CAD data presented in a CAVE visualization facility. Created a virtual mockup of PBMR reactor cavity and discussed applications of virtual mockup technology to improve Gen IV design review, construction planning, and maintenance planning.
Timothy Shaw; Anthony Baratta; Vaughn Whisker
Dealing with cultural differences in a 3D virtual classroom: a case study of collaboratively constructing a virtual Tower of Babel
The collaboration project described in this paper involved students across three cooperating institutions, on three different continents in different time zones, building a virtual Tower of Babel in a 3D Collaborative Virtual Environment (3D CVE). Much ... Keywords: 3D collaborative virtual environments, collaborative learning, multi-cultural classroom
Ekaterina Prasolova-F�rland; Theodor G. Wyeld; Teng-Wen Chang
Large scale test simulations using the Virtual Environment for Test Optimization (VETO)
The Virtual Environment for Test Optimization (VETO) is a set of simulation tools under development at Sandia to enable test engineers to do computer simulations of tests. The tool set utilizes analysis codes and test information to optimize design parameters and to provide an accurate model of the test environment which aides in the maximization of test performance, training, and safety. Previous VETO effort has included the development of two structural dynamics simulation modules that provide design and optimization tools for modal and vibration testing. These modules have allowed test engineers to model and simulate complex laboratory testing, to evaluate dynamic response behavior, and to investigate system testability. Further development of the VETO tool set will address the accurate modeling of large scale field test environments at Sandia. These field test environments provide weapon system certification capabilities and have different simulation requirements than those of laboratory testing.
Klenke, S.E.; Heffelfinger, S.R.; Bell, H.J.; Shierling, C.L.
Variation of anode grid surface morphology and its effect on operation of a triode virtual cathode oscillator
After repeatedly operation of a triode virtual cathode oscillator, the surface morphology of anode grid is studied by a scanning electron microscope. It is found that there are many quasi-periodic sawteeth formed on the anode grid, which are about 300-500 {mu}m in height, {approx}200 {mu}m in width, and 150-200 {mu}m in period. The formation of this sawteeth implies that there is possible Rayleigh-Taylor-like instability on the anode grid during the irradiation by high-current relativistic electron beam. These sawteeth enhance the electric field on anode grid, leading to more feasible of anode plasma generation, and more rapidly expansion of that plasma. As a result, the electron transmissivity of anode grid is decreased, the output microwave power of the virtual cathode oscillator is lowered and its operational performance is degraded.
Xu Qifu; Cai Dan; Zhang Qiang; Zhao Xuelong; Zhao Qi; Cheng Guoxin; Liu Lie [College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)
Energy management for hypervisor-based virtual machines
Current approaches to power management are based on operating systems with full knowledge of and full control over the underlying hardware; the distributed nature of multi-layered virtual machine environments renders such approaches insufficient. In this paper, we present a novel framework for energy management in modular, multi-layered operating system structures. The framework provides a unified model to partition and distribute energy, and mechanisms for energy-aware resource accounting and allocation. As a key property, the framework explicitly takes the recursive energy consumption into account, which is spent, e.g., in the virtualization layer or subsequent driver components. Our prototypical implementation targets hypervisor-based virtual machine systems and comprises two components: a host-level subsystem, which controls machine-wide energy constraints and enforces them among all guest OSes and service components, and, complementary, an energy-aware guest operating system, capable of fine-grained applicationspecific energy management. Guest level energy management thereby relies on effective virtualization of physical energy effects provided by the virtual machine monitor. Experiments with CPU and disk devices and an external data acquisition system demonstrate that our framework accurately controls and stipulates the power consumption of individual hardware devices, both for energy-aware and energyunaware guest operating systems. 1
Jan Stoess; Christian Lang; Frank Bellosa
Photon Redshift in a Magnetic field
Previous results from the authors concerning the arising a tiny photon anomalous paramagnetic moment are also interpreted as a red-shift in analogy to the gravitational known effect. It is due to the photon interaction with the magnetized virtual electron-positron background which withdraw transverse momentum from photons and is polarization-dependent. If the photon frequency red-shift implies a change in time, a clock would go faster for increasing magnetic field intensity.
Rojas, H P�rez
Virtual building environments (VBE) - Applying information modeling to buildings
A Virtual Building Environment (VBE) is a ''place'' where building industry project staffs can get help in creating Building Information Models (BIM) and in the use of virtual buildings. It consists of a group of industry software that is operated by industry experts who are also experts in the use of that software. The purpose of a VBE is to facilitate expert use of appropriate software applications in conjunction with each other to efficiently support multidisciplinary work. This paper defines BIM and virtual buildings, and describes VBE objectives, set-up and characteristics of operation. It informs about the VBE Initiative and the benefits from a couple of early VBE projects.
Bazjanac, Vladimir
Virtual Library on Genetics from Oak Ridge National Laboratory
DOE Data Explorer (OSTI)
The World Wide Web (WWW) Virtual Library is a collaborative effort to provide topic indices that break down into many subtopics guiding users to vast resources of information around the world. ORNL hosts the Virtual Library on Genetics as part of the WWWVL's Biosciences topic area. The VL on Genetics is also a collection of links to information resources that supported the DOE Human Genome Project. That project has now evolved into Genomics: GTL. GTL is DOE's next step in genomics--builds on data and resources from the Human Genome Project, the Microbial Genome Program, and systems biology. GTL will accelerate understanding of dynamic living systems for solutions to DOE mission challenges in energy and the environment. The section of the Virtual Library on Genetics that is titled Organisms guides users to genetic information resources and gene sequences for animals, insects, microbes, and plant life.
Virtual Reading Room after to 2000 | National Nuclear Security
after to 2000 | National Nuclear Security after to 2000 | 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 Virtual Reading Room after to 2000 Home > About Us > Our Operations > NNSA Office of General Counsel > Freedom of Information Act (FOIA) > Virtual Reading Room after to 2000 Virtual Reading Room after to 2000 Printer-friendly version Printer-friendly version
Unlocking Customer Value: The Virtual Power Plant | Department of Energy
Unlocking Customer Value: The Virtual Power Plant Unlocking Customer Value: The Virtual Power Plant Unlocking Customer Value: The Virtual Power Plant The utility world has changed drastically in the last 10 years. New technologies like Smart Meters and fully functional Smart Grid concepts have made large inroads into the utility space and no one should want to be left behind. Utilities also face additional pressures from regulatory bodies who are continuing to encourage carbon reduction and greater customer flexibility. Utilities need to balance these new requirements with the financial obligations of providing reliable power (at a reasonable price) while attempting to meet shareholder expectations. Each of these goals are not necessarily complimentary, thus utilities need to determine how to address each one.
Virtual Reading Room prior to 2000 | National Nuclear Security
prior to 2000 | National Nuclear Security prior to 2000 | 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 Virtual Reading Room prior to 2000 Home > About Us > Our Operations > NNSA Office of General Counsel > Freedom of Information Act (FOIA) > Virtual Reading Room prior to 2000 Virtual Reading Room prior to 2000 Printer-friendly version Printer-friendly version
Los Alamos' New Virtualized Data Center Saves Energy and Cash |
Alamos' New Virtualized Data Center Saves Energy and Cash Alamos' New Virtualized Data Center Saves Energy and Cash Los Alamos' New Virtualized Data Center Saves Energy and Cash March 7, 2011 - 3:15pm Addthis It takes 8,900 kilowatt hours to provide electricity to one U.S. house for a year. With the energy saved annually through Infrastructure on Demand, LANL can power 216 homes. | Photo Courtesy of LANL It takes 8,900 kilowatt hours to provide electricity to one U.S. house for a year. With the energy saved annually through Infrastructure on Demand, LANL can power 216 homes. | Photo Courtesy of LANL Sarah LaMonaca Communications Specialist, Office of Energy Efficiency & Renewable Energy What are the key facts? Data centers are responsible for nearly 2% of U.S. electricity consumption -- a price tag of $4.5 billion.
EGR Distribution in Engine Cylinders Using Advanced Virtual Simulation
Exhaust Gas Recirculation (EGR) is a well-known technology for reduction of NOx in diesel engines. With the demand for extremely low engine out NOx emissions, it is important to have a consistently balanced EGR flow to individual engine cylinders. Otherwise, the variation in the cylinders' NOx contribution to the overall engine emissions will produce unacceptable variability. This presentation will demonstrate the effective use of advanced virtual simulation in the development of a balanced EGR distribution in engine cylinders. An initial design is analyzed reflecting the variance in the EGR distribution, quantitatively and visually. Iterative virtual lab tests result in an optimized system.
Fan, Xuetong
Future Directions of the Conferencing and Collaboration Field
In this paper, the authors discuss fifteen semi-structured interviews carried out in 2010 with international industry experts and thought leaders within the conferencing and collaboration C&C field. The interviews focused on 5, 10, and 15-year time ... Keywords: 3D Worlds, Audio, CVE, Cloud Computing, Collaboration, Conferencing, Teleconferencing, Virtual Meetings
Alfie Keary; Sam Redfern
AC Loss Reduction in Filamentized YBCO Coated Conductors with Virtual Transverse Cross-cuts
While the performance of YBa{sub 2}Cu{sub 3}O{sub 7-x} (YBCO)-based coated conductors under dc currents has improved significantly in recent years, filamentization is being investigated as a technique to reduce ac loss so that the 2nd generation (2G) high temperature superconducting (HTS) wires can also be utilized in various ac power applications such as cables, transformers and fault current limiters. Experimental studies have shown that simply filamentizing the superconducting layer is not effective enough to reduce ac loss because of incomplete flux penetration in between the filaments as the length of the tape increases. To introduce flux penetration in between the filaments more uniformly and further reduce the ac loss, virtual transverse cross-cuts were made in superconducting filaments of the coated conductors fabricated using the metal organic chemical vapor deposition (MOCVD) method. The virtual transverse cross-cuts were formed by making cross-cuts (17 - 120 {micro}m wide) on the IBAD (ion beam assisted deposition)-MgO templates using laser scribing followed by depositing the superconducting layer ({approx} 0.6 {micro}m thick). AC losses were measured and compared for filamentized conductors with and without the cross-cuts under applied peak ac fields up to 100 mT. The results were analyzed to evaluate the efficacy of filament decoupling and the feasibility of using this method to achieve ac loss reduction.
Zhang, Yifei [ORNL; Duckworth, Robert C [ORNL; Ha, Tam T [ORNL; List III, Frederick Alyious [ORNL; Gouge, Michael J [ORNL; Chen, Y [SuperPower Incorporated, Schenectady, New York; X, Xiong, [SuperPower Incorporated, Schenectady, New York; Selvamanickam, V. [SuperPower Incorporated, Schenectady, New York
The Effect of Neglecting the Virtual Temperature Correction on CAPE Calculations
A simple theoretical analysis of the impact of neglecting the virtual correction on calculation of CAPE is made. This theory suggests that while ignoring the virtual correction does not introduce much error for large CAPE values, the relative ...
Charles A. Doswell III; Erik N. Rasmussen
Project PEAC : a Personal, Expressive Avatar Controller for the operation of virtual characters
The purpose of this thesis was to design and construct a prototype for the control of virtual avatars in a virtual space. It was designed with the intent to feature multiple interfaces such that the user would have many ...
Santos, Kristopher B. dos
Storage and network requirements of a low-cost computer-based virtual classroom
In this paper we investigate the network and storage requirements of a virtual classroom. The virtual classroom replaces traditional class methodologies by using the computer as the sole instrument for all class activity. The instructor and the students ...
Paul Juell; Daniel Brekke; Ronald Vetter; John Wasson
Improving virtualization in the presence of software managed translation lookaside buffers
Virtualization has become an important technology that is used across many platforms, particularly servers, to increase utilization, multi-tenancy and security. Virtualization introduces additional overhead that often relates to memory management, interrupt ...
Xiaotao Chang, Hubertus Franke, Yi Ge, Tao Liu, Kun Wang, Jimi Xenidis, Fei Chen, Yu Zhang
The development of a drug discovery virtual screening application on Taiwan unigrid
This paper describes the development of an in silico virtual screening application on Taiwan Unigrid. In silico virtual screening is one of the most promising approach to accelerate the drug development process. This pilot application implementation ...
Li-Yung Ho; Pangfeng Liu; Chien-Min Wang; Jan-Jan Wu
TR2004-518, Dartmouth College, Computer Science Creating and Detecting Doctored and Virtual Images
of "virtual porn". In 2002, the United States Supreme Court found that portions of the CPPA, being overly types of "virtual porn". In 2002 the United States Supreme Court found that portions of the CPPA, being
Farid, Hany
Antecedents of the Closeness of Human-Avatar Relationships in a Virtual World
Virtual worlds e.g., Second Life, where users interact and form relationships with other users' virtual identities represented by avatars i.e., human-avatar relationships, are increasingly influential in today's businesses and society. Nevertheless, ... Keywords: Avatar, Human-Avatar Relationship, Human-Computer Interaction, Relationship Closeness, Second Life, Virtual World
Yi Zhao; Weiquan Wang; Yan Zhu
Super-feet: a wireless hand-free navigation system for virtual environments
Navigation is a fundamental task in virtual environments. Some of the metaphors that are used to determine where users want to be placed at each moment are based on physical locomotion. Usually, these techniques require the use of several sensors and ... Keywords: navigation in virtual environments, user interface events, virtual reality ergonomics
Beatriz Rey; Jose A. Lozano; Mariano Alca�iz; Luciano Gamberini; Merche Calvet; Daniel Kerrigan; Francesco Martino
Using virtual reality and mood-induction procedures to test products with consumers of ceramic tiles
This work describes a Virtual Reality Environment (VRE), through which users are able to view and test ceramic tile products. Users' virtual interfacing with the products generated emotional experiences that allowed them to feel ''engaged'' with the ... Keywords: Consumers, Mood-induction procedures, Product testing, Relaxation, Sense of presence, Virtual reality
Berenice Serrano; Cristina Botella; Rosa M. Ba�Os; Mariano Alca�Iz
Effectiveness of a Virtual Laboratory as a preparatory resource for Distance Education chemistry students
Many have argued that interactive 3D virtual environments have great educational potential due to their ability to engage learners in the exploration, construction and manipulation of virtual objects, structures and metaphorical representations of ideas. ... Keywords: Chemistry education, Distance Education, Interactive learning environments, Post-secondary education, Simulations, Virtual reality
Barney Dalgarno; Andrea G. Bishop; William Adlong; Danny R. Bedgood, Jr.
A light-weight virtual machine monitor for Blue Gene/P
In this paper, we present a light-weight, micro--kernel-based virtual machine monitor (VMM) for the Blue Gene/P Supercomputer. Our VMM comprises a small ?-kernel with virtualization capabilities and, atop, a user-level VMM component that manages virtual ...
Jan Stoess; Jonathan Appavoo; Udo Steinberg; Amos Waterland; Volkmar Uhlig; Jens Kehne
Genomic control of agent morphogenesis in a physically correct virtual environment
Based on the analysis of the morphogenesis process of real biological organisms, the basic principles are formulated for the simulation of genomic control of the morphogenesis of a virtual agent in a physically correct environment. A model of the genome ... Keywords: agent morphogenesis, artificial intelligence, genetic algorithm, genomic control, physically correct virtual environment, virtual agent
Z. V. Nagoev
Smart Grid Security Educational Training with ThunderCloud: A Virtual Security Test Bed
In this paper, we describe a cloud based virtual smart grid test bed: ThunderCloud, which can be used for domain-specific security educational training applicable to the smart grid environment. The test bed consists of virtual machines connected using ... Keywords: Domain-Specific Security Training, Smart Grid, Virtual Test Bed
Joseph Stites, Ambareen Siraj, Eric L. Brown
m+pSpaces: virtual workspaces in the spatially-aware mobile environment
We introduce spatially-aware virtual workspaces for the mobile environment. The notion of virtual workspaces was initially conceived to alleviate mental workload in desktop environments with limited display real-estate. Using spatial properties of mobile ... Keywords: m+pspaces, mobile virtual workspace, multidisplay environments, pico-projectors, spatially-aware displays
Jessica Cauchard; Markus L�chtefeld; Mike Fraser; Antonio Kr�ger; Sriram Subramanian
The study and realization of virtual organization file system based on DHT technology
Virtual Organization File System (VOFS) allows users from different virtual organizations sharing and accessing files through the Internet. It is a dynamic file sharing system and quite different from conventional file sharing solutions. However, All ... Keywords: P2P network, chord, distributed hash table (DHT), grid, peer, virtual organization file system(VOFS)
Jiqing Liu; Jinhua Huang; Chen Xing
SnowFlock: Virtual Machine Cloning as a First-Class Cloud Primitive
A basic building block of cloud computing is virtualization. Virtual machines (VMs) encapsulate a user�s computing environment and efficiently isolate it from that of other users. VMs, however, are large entities, and no clear APIs exist yet to ... Keywords: Virtualization, cloud computing
H. Andr�s Lagar-Cavilla; Joseph A. Whitney; Roy Bryant; Philip Patchin; Michael Brudno; Eyal de Lara; Stephen M. Rumble; M. Satyanarayanan; Adin Scannell
Evaluating human-robot interaction during a manipulation experiment conducted in immersive virtual reality
This paper presents the main highlights of a Human-Robot Interaction (HRI) study conducted during a manipulation experiment performed in Cave Automatic Virtual Environment (CAVE). Our aim is to assess whether using immersive Virtual Reality (VR) for ... Keywords: CAVE, human-robot interaction, immersive virtual reality, manipulation, presence
Mihai Duguleana; Florin Grigorie Barbuceanu; Gheorghe Mogan
3D Virtual worlds and the metaverse: Current status and future possibilities
Moving from a set of independent virtual worlds to an integrated network of 3D virtual worlds or Metaverse rests on progress in four areas: immersive realism, ubiquity of access and identity, interoperability, and scalability. For each area, the current ... Keywords: Immersion, Internet, second life, virtual worlds
John David N. Dionisio, William G. Burns III, Richard Gilbert
A Distributed Virtual Backbone Development Scheme for Ad-Hoc Wireless Networks
The virtual backbone is an approach for solving routing problems in ad-hoc wireless networks. The virtual backbone approach features low latency, moderate routing overhead and is a hybrid scheme that uses the table-driven and on-demand routing ... Keywords: Steiner tree, ad-hoc networks, clustering, routing, virtual backbone
Jyh-Horng Lin; Chyi-Ren Dow; Shiow-Fen Hwang
The Role of Communication and Trust in Global Virtual Teams: A Social Network Perspective
The importance of communication and trust in the context of global virtual teams has been noted and reiterated in the information systems (IS) literature. Yet precisely how communication and trust influence certain outcomes within virtual teams remains ... Keywords: Communication, Distributed Teams, Global Virtual Teams, Hybrid Teams, Individual Performance, Mediation, Networked Individualism, Social Network Analysis, Trust
Saonee Sarker; Manju Ahuja; Suprateek Sarker; Sarah Kirkeby
On the Economics of 3G Mobile Virtual Network Operators (MVNOs)
The paper assesses the market conditions and dynamics, the architectures and the different approaches for deployment of 3G Mobile Virtual Network Operators (MVNOs), in an attempt to address specific advantages and pitfalls. Following the definition of ... Keywords: (MVNOs), 3G economics, 3G market, 3G systems, UMTS, mobile internet economics, mobile operators, mobile virtual network operators, techno-economics, virtual network operators
D. Varoutas; D. Katsianis; Th. Sphicopoulos; K. Stordahl; I. Welling
Virtual InfiniBand clusters for HPC clouds
High Performance Computing (HPC) employs fast interconnect technologies to provide low communication and synchronization latencies for tightly coupled parallel compute jobs. Contemporary HPC clusters have a fixed capacity and static runtime environments; ... Keywords: HPC, InfiniBand, cloud computing, cluster, virtualization
Marius Hillenbrand; Viktor Mauch; Jan Stoess; Konrad Miller; Frank Bellosa
Exploring Humanoid Robots Locomotion Capabilities in Virtual Disaster Response Scenarios
Exploring Humanoid Robots Locomotion Capabilities in Virtual Disaster Response Scenarios Karim. INTRODUCTION Disaster response is attracting attention from the robotics research community, and even more by the DARPA's call on disaster operations. Hence, we focus on locomotion tasks that apparently require human
Paris-Sud XI, Université de
Catenation and Specialization for Tcl Virtual Machine Performance
Catenation and Specialization for Tcl Virtual Machine Performance Benjamin Vitale bv @ cs-in-time native-code compilation. In the context of the Tcl VM, we convert bytecodes to native Sparc code implementation. These are relatively long in Tcl, but dispatch is still a signif- icant overhead. However
Abdelrahman, Tarek S.
The rhizomatic structure of cyberspace: virtuality and its possibilities
This theoretical essay concentrates on a reflection about the multiple possibilities that unfold due to the interactions in cyberspace. As a goal, we stress the actuality and identify possible lines of flights; it is an attempt to chart areas still to ... Keywords: cyberspace interactions, lines of flight, rhizome, virtual universe
Leandro Mauricio Medeiros Vieira; Marcos Ferasso
Collateral requirements for virtual transactions on the NYISO
The New York ISO's proposed tariff revisions for establishing collateral for virtual transactions offers several benefits but is burdened by a serious shortcoming: it neglects recent shifts in supply and demand that will affect the premium. The author weighs the existing and proposed methods and also considers two alternatives. (author)
Hadsell, Lester
Collaborative virtual environments in the year of the dragon
Three suggestions are made for extensions from and to CVE's: awareness of others, multiple media, and scalability. Awareness of others and their activities is strongly desirable in all media and applications, not just ... Keywords: CVE, awareness, multiple media, scalability, virtual reality
Samuli Pekkola; Mike Robinson; Markku-Juhani O. Saarinen; Jonni Korhonen; Saku Hujala; Tero Toivonen
Processor virtualization and split compilation for heterogeneous multicore embedded systems
Embedded multiprocessors have always been heterogeneous, driven by the power-efficiency and compute-density of hardware specialization. We aim to achieve portability and sustained performance of complete applications, leveraging diverse programmable ... Keywords: annotations, back-end optimization, bytecode language, heterogeneous multicore, portable performance, specialization, split compilation, vectorization, virtualization
Albert Cohen; Erven Rohou
Shared virtual environment (SVE): a framework for developing social games
The communication channels are changing. More and more, face to face communication is being replaced by computer mediated communication. Using mediated communication, the non-verbal communication cues that are available in face to face communication ... Keywords: games, pervasive games, shared virtual environment, social gaming
M. Carmen Juan; Mariano Alca�iz; Luciano Gamberini; Irene Zaragoza; F. Martino
Ten Steps to Developing Virtual Reality Applications for Engineering Education
several years to develop a series of virtual reality ( VR) based computer modules for use in undergraduate engineering education. The goals of this work have been threefold: 1. To produce modules with as much practical use to as many students as possible.
Efficient virtual machine support of runtime structural reflection
Increasing trends towards adaptive, distributed, generative and pervasive software have made object-oriented dynamically typed languages become increasingly popular. These languages offer dynamic software evolution by means of reflection, facilitating ... Keywords: Dynamically typed languages, JIT compilation, Prototype-based object-oriented model, SSCLI, Structural reflection, Virtual machine
Francisco Ortin; Jose Manuel Redondo; J. Baltasar Garc�a Perez-Schofield
Virtual reality representation of Martian soil for space exploration
Space exploration is a very challenging task for various reasons, such as hostile environments, different gravity laws, either unknown or unpredictable phenomena which need ad hoc technological solutions to be devised first and then put in practice. ... Keywords: Digital Elevation Model, Space Exploration, Terrain Representation, Virtual Reality
L. Piovano; M. M. Brunello; I. Musso; L. Rocci; V. Basso
The virtual power system testbed and inter-testbed integration
The Virtual Power System Testbed (VPST) at University of Illinois at Urbana-Champaign is part of the Trustworthy Cyber Infrastructure for the Power Grid (TCIP) and is maintained by members of the Information Trust Institute (ITI). VPST is designed to ...
David C. Bergman; Dong Jin; David M. Nicol; Tim Yardley
Traxion: a tactile interaction device with virtual force sensation
This paper introduces a new mechanism to induce a virtual force based on human illusory sensations. An asymmetric signal is applied to a tactile actuator consisting of an electromagnetic coil, a metal weight, and a spring, such that the user feels that ... Keywords: illusion, input devices, tactile interactions
Jun Rekimoto
On the competitive effects of mobile virtual network operators
Mobile virtual network operators (MVNOs) offer mobile telecoms services by purchasing capacity from mobile network operators (MNOs) and competing with the latter at the retail level. This paper employs a two stage model and analyses to what extent MVNOs ... Keywords: Competition, L13, L42, L96, MVNO, Mobile telecommunication, Regulation
Philip Kalmus; Lars Wiethaus
Spectral Analysis via the Virtual Observatory: The Service Theossa
In the framework of the Virtual Observatory, the newly developed service TheoSSA provides access to theoretical stellar spectral-energy distributions. In a pilot phase, this service is based on the well established Tuebingen NLTE Model-Atmosphere Package for hot, compact stars. We demonstrate its present capabilities and future extensions.
Ringat, Ellen; Werner, Klaus
Application-aware cross-layer virtual machine resource management
Existing resource management solutions in datacenters and cloud systems typically treat VMs as black boxes when making resource allocation decisions. This paper advocates the cooperation between VM host- and guest-layer schedulers for optimizing the ... Keywords: autonomic computing, fuzzy modeling, resource management, virtualization
Lixi Wang; Jing Xu; Ming Zhao
A Survey on Database Performance in Virtualized Cloud Environments
Cloud Computing emerged as a major paradigm over the years. Major challenges it poses to computer science are related to latency, scale, and reliability issues. It leverages strong economical aspects and provides sound answers to questions like energy ... Keywords: Cloud Computing, Database Management Systems DBMS, Online Transaction Processing OLTP, Performance, Virtualization
Alejandro Buchmann; Todor Ivanov; Ilia Petrov
Visual attention based information culling for Distributed Virtual Environments
The central goal in Distributed Virtual Environments (DVEs) is to provide an experience of the shared world that is perceptually plausible for the immersed user. This has to be achieved in the face of network issues such as bandwidth limitations and ...
Ashweeni Kumar Beeharee; Adrian J. West; Roger Hubbold
Stakeholders' roles in virtual project environment: A case study
The rising cost of resources within an organization, increasing capability of information technology, the need to conduct project at different places and availability of competent and inexpensive manpower elsewhere have promoted many companies to adopt ... Keywords: Communication, D83, Management, O22, Project of projects, Stakeholders, Virtual environment
Shaligram Pokharel
VIRTUAL E-MOTOR AS A TOOL FOR THE DEVELOPMENT OF POWERTRAIN CONTROLLERS The introduction of electric motors in powertrains provides many possibilities to influence the vehicle driveability using the inverter. The high dynamic response of electric motors can be put to use for the compensation of powertrain
Noé, Reinhold
Networked Graphics: Building Networked Games and Virtual Environments
This broad-ranging book equips programmers and designers with a thorough grounding in the techniques used to create truly network-enabled computer graphics and games. Written for graphics/game/VE developers and students, it assumes no prior knowledge ... Keywords: Computer Animation, Computer Graphics, Computer Science, Computers, Game Programming, Interactive & Multimedia, Networking, Video & Electronic, Virtual Reality
Anthony Steed; Manuel Fradinho Oliveira
Real-Time Camera Planning for Navigation in Virtual Environments
In this work, we have developed a real-time camera control module for navigation in virtual environments. With this module, the tracking motion of a third-person camera can be generated automatically to allow a user to focus on the control of an avatar. ... Keywords: Budget-based Planning, Intelligent Cam-era Control, Probabilistic Roadmap, Real-Time Camera Planning
Tsai-Yen Li; Chung-Chiang Cheng
Virtual Machine Services: An Opportunity for Hardware Customization
of transistor count, which is leading to archi- tecture heterogeneity and customization. (2) Software developers (Virtual Machine), which executes services such as profiling, compilation, scheduling, and memory for potential improvements in energy through the use of hardware heterogeneity. This paper uses systematic
McKinley, Kathryn S.
I/O performance of virtualized cloud environments
The scientific community is exploring the suitability of cloud infrastructure to handle High Performance Computing (HPC) applications. The goal of Magellan, a project funded through DOE ASCR, is to investigate the potential role of cloud computing to ... Keywords: I/O benchmarking, cloud, virtual environments
Devarshi Ghoshal; Richard Shane Canon; Lavanya Ramakrishnan
Long Term Climate Simulations Using an Adaptable Virtual Machine.
the DOE NERSC, a re mote machine could be added to the virtual machine until the NERSC account test bed. Another is to include the NERSC machines at LBL, the Cray C90 and the Cray T3E connections, particularly into NERSC, would be important for the success of this project. The latency
Applications of Virtual Data in the LIGO Experiment
Many Physics experiments today generate large volumes of data. That data is then processed in many ways in order to achieve the understanding of fundamental physical phenomena. Virtual Data is a concept that unifies the view of the data whether it is ...
Ewa Deelman; Carl Kesselman; Roy Williams; Kent Blackburn; Albert Lazzarini; Scott Koranda
Emohawk: Learning Virtual Characters by Doing Michal Bda, Cyril Brom
architectures, c) coordination of multiple characters; i.e., unfolding "atomic bits" of a story, d) composing a story from these "atomic bits". The primary audience is university students and teachers of general with the environment from the observer's perspective. Fig. 1. Emohawk content in Unreal Engine 2: a) a virtual city, b
Brom, Cyril
Virtual Economy Simulation and Gaming - An Agent Based Approach
In this paper we analyze an economic systems as agent based bottom up models. For the purpose we introduce a small national economy called a virtual economy and an exchange algebra for state space description. We construct dynamical agent based simulation ...
Hiroshi Deguchi; Takao Terano; Koichi Kurumatani; Taro Yuzawa; Shigeji Hashimoto; Hiroyuki Matsui; Akio Sashima; Toshiyuki Kaneda
Cooperatives of distributed energy resources for efficient virtual power plants
The creation of Virtual Power Plants (VPPs) has been suggested in recent years as the means for achieving the cost-efficient integration of the many distributed energy resources (DERs) that are starting to emerge in the electricity network. In this work, ... Keywords: coalition formation, energy and emissions, incentives for cooperation, simulation
Georgios Chalkiadakis; Valentin Robu; Ramachandra Kota; Alex Rogers; Nicholas R. Jennings
Measurements and characterization - Data transfer and virtual lab
This brochure presents the capabilities that the Measurements and Characterization Division has for transferring secure characterization data to clients over the Web, and for collaborating in R and D via the Web over distances (i.e., working as a virtual lab).
Cook, G.
Energy Optimization with Multi Virtual Gravity for Robotic Gait
Although people's legs are capable of a broad range of muscle-use and gait patterns, they generally prefer just two, walking and running. A popular hypothesis regarding legged locomotion is that humans and other large animals walk and run in a manner ... Keywords: Biped Robot, Virtual Gravity, Optimization, Piecewise Torque, Energy
Lipeng Yuan; Liming Yuan; Hongying Lu
Improving the Effectiveness of Virtual Teams by Adapting Team Processes
Results are presented from a study on virtual teams and whether appropriate early training can positively influence their effectiveness. Sixteen teams that worked together for periods ranging from three months to three years were studied. Team processes ... Keywords: brainstorming, collaboration, communication, computer-mediated, consensus, decision-making, dispersed, distance, geographically distributed
Daniel J. Rice; Barry D. Davidson; John F. Dannenhoffer; Geri K. Gay
Applied Environmental Microbiology | VIMSS - Virtual Institute for
Collection of Soil Samples Collection of Soil Samples Identification of Natural Stressors Profiling of Microbial Population Field and Simulated Conceptual Model Facilities The Applied Environmental Microbiology (AEM) Core is the source of environmental data and samples that determine the stressors that will be studied, pro-vides the environments for growing the organisms to be tested, simulates stressed environments, and verifies the conceptual models to determine how these stress regulatory pathways control the biogeochemistry of contaminated sites. The specific goals of the AEM Core are to: Survey and map DOE sites contaminated by metals and radionuclides using chemical and molecular/ microbiological parameters to determine major microbial populations and potential stressors for Desulfovibrio vulgaris,
Nuclear Fusion Power
Power Nuclear fusion reactors, if they can be made to work, promise virtually unlimited power for the indefinite future. This is because the fuel, isotopes of hydrogen, are...
VR/IS Lab Virtual Actor research overview
This overview presents current research at Sandia National Laboratories in the Virtual Reality and Intelligent Simulation Lab. Into an existing distributed VR environment which we have been developing, and which provides shared immersion for multiple users, we are adding virtual actor support. The virtual actor support we are adding to this environment is intended to provide semi-autonomous actors, with oversight and high-level guiding control by a director/user, and to allow the overall action to be driven by a scenario. We present an overview of the environment into which our virtual actors will be added in Section 3, and discuss the direction of the Virtual Actor research itself in Section 4. We will briefly review related work in Section 2. First however we need to place the research in the context of what motivates it. The motivation for our construction of this environment, and the line of research associated with it, is based on a long-term program of providing support, through simulation, for situational training, by which we mean a type of training in which students learn to handle multiple situations or scenarios. In these situations, the student may encounter events ranging from the routine occurance to the rare emergency. Indeed, the appeal of such training systems is that they could allow the student to experience and develop effective responses for situations they would otherwise have no opportunity to practice, until they happened to encounter an actual occurance. Examples of the type of students for this kind of training would be security forces or emergency response forces. An example of the type of training scenario we would like to support is given in Section 4.2.
Shawver, D.M.; Stansfield, S.
A virtual corporation tackles SO[sub 2] allowance tracking
Beginning in 1995, electric utilities will manage a new corporate asset, an SO[sub 2] emission allowance. The government's allowance program unleashed an accountability monster. How would utilities track thousands of allowance serial numbers They needed a software tool to oversee the myriad SO[sub 2] allowances they would receive from the EPA; provide decisionmaking information about allowance costs, year of issue, and usage; and generate the requisite reports -- but no computer solution existed. For 10 utilities and one software supplier, the way to tame the monster was to form a [open quotes]virtual corporation.[close quotes] The term describes a group of companies that unite to address a specific problem or opportunity. By forming an alliance, they can react to a problem. Electric Software Products (ESP), a developer of software for electric utilities, saw an opportunity to act as the facilitator and software developer for an alliance of Phase 1-affected utilities. The goal of the virtual corporation as seen by ESP was to develop a virtual product that could handle the nuances of tracking and reporting SO[sub 2] allowances. A virtual product is one that can be produced quickly and customized in response to customer demand. The virtual product resulting from the utility collaboration was named the Allowance Tracking Workstation[trademark] (ATW). Version 1.0 of the ATW is scheduled for release on May 27, 1994. Through the Development Group format, the ATW will be flexible enough to meet the changing needs of its customers, the electric utilities.
Plank, K.; Gloski, D.
The birth of the virtual clinic: the Virtual Terrorism Response Academy as serious game and epistemological space
The Interactive Media Laboratory at Dartmouth Medical School produces computer games and multimedia programs for public health preparedness. With funding from the U.S. Department of Homeland Security, the IML is now developing the Virtual Terrorism ... Keywords: computer game, computer simulation, crisis management, epistemological space, public rhetoric
Elizabeth Losh
Generation IV Nuclear Energy Systems Construction Cost Reductions through the Use of Virtual Environments - Task 4 Report: Virtual Mockup Maintenance Task Evaluation
Task 4 report of 3 year DOE NERI-sponsored effort evaluating immersive virtual reality (CAVE) technology for design review, construction planning, and maintenance planning and training for next generation nuclear power plants. Program covers development of full-scale virtual mockups generated from 3D CAD data presented in a CAVE visualization facility. This report focuses on using Full-scale virtual mockups for nuclear power plant training applications.
T-588: HP Virtual SAN Appliance Stack Overflow | Department of Energy
T-588: HP Virtual SAN Appliance Stack Overflow T-588: HP Virtual SAN Appliance Stack Overflow T-588: HP Virtual SAN Appliance Stack Overflow March 25, 2011 - 5:05pm Addthis PROBLEM: HP Virtual SAN Appliance Stack Overflow in 'hydra.exe' Lets Remote Users Execute Arbitrary Code. PLATFORM: HP StorageWorks P4000 Virtual SAN Appliance Software ABSTRACT: A vulnerability has been reported in HP StorageWorks P4000 Virtual SAN Appliance Software, which can be exploited by malicious people to compromise a vulnerable system. reference LINKS: Secunia advisory 34782 SecurityTracker Alert ID: 1025249 ZDI-11-111 Bugtraq ID: 47005 IMPACT ASSESSMENT: High Discussion: Hewlett-Packard Virtual SAN Appliance is prone to a remote buffer-overflow vulnerability. Attackers may exploit this issue to execute arbitrary code within the context of the affected application. Failed exploit attempts may result in
V-189: Oracle VirtualBox 'tracepath' Bug Lets Local Guest Users Deny
9: Oracle VirtualBox 'tracepath' Bug Lets Local Guest Users 9: Oracle VirtualBox 'tracepath' Bug Lets Local Guest Users Deny Service on the Target Host V-189: Oracle VirtualBox 'tracepath' Bug Lets Local Guest Users Deny Service on the Target Host July 1, 2013 - 12:48am Addthis PROBLEM: Oracle VirtualBox 'tracepath' Bug Lets Local Guest Users Deny Service on the Target Host PLATFORM: VirtualBox 4.2.12 ABSTRACT: A vulnerability was reported in Oracle VirtualBox. REFERENCE LINKS: VirtualBox ticket: 11863 SecurityTracker Alert ID: 1028712 IMPACT ASSESSMENT: Medium DISCUSSION: A local user on the guest operating system can issue a 'tracepath' command to cause the network on the target host system to become unavailable. IMPACT: A local user on a guest operating system can cause denial of service conditions on the target host system.
CZT Virtual Frisch-grid Detector: Principles and Applications
Cadmium Zinc Telluride (CdZnTe or CZT) is a very attractive material for using as room-temperature semiconductor detectors, because it has a wide bandgap and a high atomic number. However, due to the material's poor hole mobility, several special techniques were developed to ensure its suitability for radiation detection. Among them, the virtual Frisch-grid CZT detector is an attractive option, having a simple configuration, yet delivering an outstanding spectral performance. The goal of our group in Brookhaven National Laboratory (BNL) is to improve the performance of Frisch-ring CZT detectors; most recently, that effort focused on the non-contacting Frisch-ring detector, allowing us to build an inexpensive, large-volume detector array with high energy-resolution and a large effective area. In this paper, the principles of virtual Frisch-grid detectors are described, especially BNL's innovative improvements. The potential applications of virtual Frisch-grid detectors are discussed, and as an example, a hand-held gamma-ray spectrometer using a CZT virtual Frischgrid detector array is introduced, which is a self-contained device with a radiation detector, readout circuit, communication circuit, and high-voltage supply. It has good energy resolution of 1.4% (FWHM of 662-keV peak) with a total detection volume of {approx}20 cm{sup 3}. Such a portable inexpensive device can be used widely in nonproliferation applications, non-destructive detection, radiation imaging, and for homeland security. Extended systems based on the same technology have potential applications in industrial- and nuclear-medical-imaging.
Cui,Y.; Bolotnikov, A.; Camarda, G.; Hossain, A.; James, R. B.
A scalable virtual circuit routing scheme for ATM networks
Abstract: We present a scalable VC routing protocol based on the viewserver hierarchy. Each viewserver maintains a partial view of the network. By querying these viewservers, a source obtains a merged view that contains a path to the destination. The ... Keywords: ATM networks, asynchronous transfer mode, blocking probability, destination, packet switching networks, real-time workload, scalable VC routing protocol, scalable virtual circuit routing, setup request packet, simulation, source, storage, viewserver hierarchy
Deeply Virtual Exclusive Processes and Generalized Parton Distributions
The goal of the comprehensive program in Deeply Virtual Exclusive Scattering at Jefferson Laboratory is to create transverse spatial images of quarks and gluons as a function of their longitudinal momentum fraction in the proton, the neutron, and in nuclei. These functions are the Generalized Parton Distributions (GPDs) of the target nucleus. Cross section measurements of the Deeply Virtual Compton Scattering (DVCS) reaction ep {yields} ep{gamma} in Hall A support the QCD factorization of the scattering amplitude for Q^2 {>=} 2 GeV^2. Quasi-free neutron-DVCS measurements on the Deuteron indicate sensitivity to the quark angular momentum sum rule. Fully exclusive H(e, e'p{gamma} ) measurements have been made in a wide kinematic range in CLAS with polarized beam, and with both unpolarized and longitudinally polarized targets. Existing models are qualitatively consistent with the JLab data, but there is a clear need for less constrained models. Deeply virtual vector meson production is studied in CLAS. The 12 GeV upgrade will be essential for for these channels. The {rho} and {omega} channels reactions offer the prospect of flavor sensitivity to the quark GPDs, while the {phi}-production channel is dominated by the gluon distribution.
Short paper: 3-Hand Manipulation of Virtual Objects
In this paper we introduce a new 3D interaction technique called �3-Hand Manipulation�, for multi-user collaborative manipulation of 3D objects. The 3-Hand Manipulation relies on the use of three manipulation points that can be used simultaneously by three different �hands � of two or three users. Interestingly, the three translation motions of the manipulation points can fully determine the resulting 6 degrees of freedom motion of the manipulated object. We describe the implementation of the 3-Hand Manipulation, its graphical representations and an illustration of its use by two or three users on an insertion task in immersive virtual environment. This technique could be used in various applications of collaborative VR such as for virtual prototyping, training simulations, assembly and maintenance simulations. Categories and Subject Descriptors (according to ACM CCS): H.5.1 [Information Interfaces and Presentation (e.g. HCI)]: Multimedia Information Systems�Artificial, augmented, and virtual realities; I.3.6 [Computer Graphics]: Methodology and Techniques�Interaction techniques
Laurent Aguerreche; Thierry Duval; Anatole L�cuyer
Improving protein flexibility predictions by combining statistical sampling with a mean-field virtual Pebble Game
The Pebble Game (PG) algorithm is an efficient method to characterize protein flexibility. The PG calculates several mechanical graph rigidity quantities based on a network of chemical interactions. Because noncovalent chemical interactions continually ... Keywords: Pebble Game, graph rigidity, protein flexibility, rigid cluster decomposition
Luis C. Gonz�lez; Dennis R. Livesay; Donald J. Jacobs
Virtual "Open House" Makes it Easier to Tour NETL Labs | Department of
Virtual "Open House" Makes it Easier to Tour NETL Labs Virtual "Open House" Makes it Easier to Tour NETL Labs Virtual "Open House" Makes it Easier to Tour NETL Labs July 11, 2013 - 3:47pm Addthis Virtual âOpen Houseâ Makes it Easier to Tour NETL Labs NETL's Virtual Open House Have you ever wondered what it's like to work with a first class technology lab? Are you looking for a cutting-edge facility where you can be a part of important research projects? Or are you just interested in the latest research on energy technologies? The Office of Fossil Energy's National Energy Technology Laboratory (NETL) has just made it easier for you with a one-stop web "open house" that provides an overview from the lab's director, briefings from other lab leaders, and a virtual tour of its sites in Oregon, Pennsylvania, and
T-608: HP Virtual Server Environment Lets Remote Authenticated Users Gain
8: HP Virtual Server Environment Lets Remote Authenticated 8: HP Virtual Server Environment Lets Remote Authenticated Users Gain Elevated Privileges T-608: HP Virtual Server Environment Lets Remote Authenticated Users Gain Elevated Privileges April 22, 2011 - 7:47am Addthis PROBLEM: A vulnerability was reported in HP Virtual Server Environment. A remote authenticated user can obtain elevated privileges on the target system. PLATFORM: HP Virtual Server Environment prior to v6.3 ABSTRACT: A potential security vulnerability has been identified in HP Virtual Server Environment for Windows. The vulnerability could be exploited remotely to elevate privileges. reference LINKS: HP Document ID: c02749050 SecurityTracker Alert ID: 1025429 CVE-2011-1724 HP Insight Software media set 6.3 HP Technical Knowledge Base Discussion: System management and security procedures must be reviewed frequently to
Circular, elliptic and oval billiards in a gravitational field
We consider classical dynamical properties of a particle in a constant gravitational force and making specular reflections with circular, elliptic or oval boundaries. The model and collision map are described and a detailed study of the energy regimes is made. The linear stability of fixed points is studied, yielding exact analytical expressions for parameter values at which a period-doubling bifurcation occurs. The dynamics is apparently ergodic at certain energies in all three models, in contrast to the regularity of the circular and elliptic billiard dynamics in the field-free case. This finding is confirmed using a sensitive test involving Lyapunov weighted dynamics. In the last part of the paper a time dependence is introduced in the billiard boundary, where it is shown that for the circular billiard the average velocity saturates for zero gravitational force but in the presence of gravitational it increases with a very slow growth rate, which may be explained using Arnold diffusion. For the oval billiard, where chaos is present in the static case, the particle has an unlimited velocity growth with an exponent of approximately 1/6.
D. R. da Costa; C. P. Dettmann; E. D. Leonel
Observation of high-power millimeter wave emission from a virtual cathode
Intense bursts of mm wave power have been observed in microwave generation experiments with a relativistic electron beam (REB) virtual cathode oscillator. In this device an electron beam is injected into a drift space at a current above the space-charge-limit, and a potential develops downstream which is large enough to reflect electrons back to the source region. Two mechanisms can give rise to microwave oscillations in a virtual cathode device: electrons reflexing between the real and virtual cathodes, and oscillations in the amplitude and position of the virtual cathode. Typically both mechanisms are present, but in the present experiments reflexing has been shown to be dominant.
Davis, H.A.; Bartsch, R.R.; Sherwood, E.G.; Stringfield, R.M.; Thode, L.E.
Planning and adjustments for the control of reach extent in a virtual environment
1. Holden MK: Virtual environments for motor rehabilitation:a physical 3-dimensional environment in healthy and strokevirtual versus physical environment. Acta Psychol (Amst)
Stewart, Jill Campbell; Gordon, James; Winstein, Carolee J
Virtual Long Baseline (VLBL) autonomous underwater vehicle navigation using a single transponder .
??This thesis presents a simulation of autonomous underwater vehicle navigation using a single transponder to create a virtual long baseline (VLBL). Similarly to LBL systems,� (more)
LaPointe, Cara E. G.
Virtual Appliances in the Collective: A Road to Hassle-Free Computing
This paper describes the vision of the Collective, a compute utility which runs internet services as well as the highly interactive applications we run on desktop computers today. As part of this vision, we wish to shift the burden of administrating the desktops from users to professionals. To decrease the cost of administering systems, we find inspiration in the reliability and maintainability of network-connected computer appliances. We argue for structuring our software as a group of networked appliances, each appliance virtualized on a virtual machine monitor. We show how to run virtual appliances in the Collective system and examine some ways in which individuals and groups may adopt virtual appliances.
Constantine Sapuntzakis; Monica S. Lam; A Road; Hassle-free Computing
??Com o desenvolvimento e a prolifera��o dos monitores de m�quinas virtuais, surgiu um novo conceito, uma nova tend�ncia na �rea de virtualiza��o de sistemas: virtual� (more)
Diego Luis Kreutz
Collision Detection and Merging of Deformable B-Spline Surfaces in Virtual Reality Environment.
??This thesis presents a computational framework for representing, manipulating and merging rigid and deformable freeform objects in virtual reality (VR) environment. The core algorithms for� (more)
Pungotra, Harish
The Virtual Control Room for Fusion Energy Sciences (V3) (A24771)
Proc. Of The Virtual Control Room For Fusion Energy Sciences (V3)US DOE National Collaboratories Program Meeting(2004) Champaign Illinois, US, 2004999610460
Schissel, D.P.
Breakthrough: MFiX: Building Industry-Scale Machines in a Virtual World
This powerful virtual modeling software is making huge strides in energy efficiency in coal gasification processes, and also predicting volcanic eruptions.
profit maximizing price production costs for a monopolistto pay the virtual production costs to the seller of thefor the variable production costs of the plant. Regulators
User's Guide Virtual Hydropower Prospector Version 1.1
The Virtual Hydropower Prospector is a web-based geographic information system (GIS) application for displaying U.S. water energy resource sites on hydrologic region maps. The application assists the user in locating sites of interest and performing preliminary, development feasibility assessments. These assessments are facilitated by displaying contextual features in addition to the water energy resource sites such as hydrograpy, roads, power infrastructure, populated places, and land use and control. This guide provides instructions for operating the application to select what features are displayed and the extent of the map view. It also provides tools for selecting features of particular interest and displaying their attribute information.
Douglas G. Hall; Sera E. White; Julie A. Brizzee; Randy D. Lee
Beam Spin Asymmetry Measurements from Deeply Virtual Meson Production
Study of deeply virtual exclusive meson production (DVMP), is being conducted in the E1-DVCS experiment with the CLAS detector at Jefferson Lab. The main motivation of the experiment is to characterize the partonic properties of the nucleon in the framework of generalized parton distributions (GPDs). The data were taken in the spring of 2005 using a 5.7 GeV longitudinally polarized electron beam and an unpolarized hydrogen target. We report on the on-going beam spin asymmetry analysis for pseudo-scalar channels and future experiments.
K. Joo; R. De Masi; M. Garcon; V. Kubarovsky; P. Stoler; M. Ungaro; B. Zhao
Prototyping Faithful Execution in a Java virtual machine.
This report presents the implementation of a stateless scheme for Faithful Execution, the design for which is presented in a companion report, ''Principles of Faithful Execution in the Implementation of Trusted Objects'' (SAND 2003-2328). We added a simple cryptographic capability to an already simplified class loader and its associated Java Virtual Machine (JVM) to provide a byte-level implementation of Faithful Execution. The extended class loader and JVM we refer to collectively as the Sandia Faithfully Executing Java architecture (or JavaFE for short). This prototype is intended to enable exploration of more sophisticated techniques which we intend to implement in hardware.
Tarman, Thomas David; Campbell, Philip LaRoche; Pierson, Lyndon George
Decentralised optimisation of cogeneration in virtual power plants
Within several projects we investigated grid structures and management strategies for active grids with high penetration of renewable energy resources and distributed generation (RES and DG). Those ''smart grids'' should be designed and managed by model based methods, which are elaborated within these projects. Cogeneration plants (CHP) can reduce the greenhouse gas emissions by locally producing heat and electricity. The integration of thermal storage devices is suitable to get more flexibility for the cogeneration operation. If several power plants are bound to centrally managed clusters, it is called ''virtual power plant''. To operate smart grids optimally, new optimisation and model reduction techniques are necessary to get rid with the complexity. There is a great potential for the optimised management of CHPs, which is not yet used. Due to the fact that electrical and thermal demands do not occur simultaneously, a thermally driven CHP cannot supply electrical peak loads when needed. With the usage of thermal storage systems it is possible to decouple electric and thermal production. We developed an optimisation method based on mixed integer linear programming (MILP) for the management of local heat supply systems with CHPs, heating boilers and thermal storages. The algorithm allows the production of thermal and electric energy with a maximal benefit. In addition to fuel and maintenance costs it is assumed that the produced electricity of the CHP is sold at dynamic prices. This developed optimisation algorithm was used for an existing local heat system with 5 CHP units of the same type. An analysis of the potential showed that about 10% increase in benefit is possible compared to a typical thermally driven CHP system under current German boundary conditions. The quality of the optimisation result depends on an accurate prognosis of the thermal load which is realised with an empiric formula fitted with measured data by a multiple regression method. The key functionality of a virtual power plant is to increase the value of the produced power by clustering different plants. The first step of the optimisation concerns the local operation of the individual power generator, the second step is to calculate the contribution to the virtual power plant. With small extensions the suggested MILP algorithm can be used for an overall EEX (European Energy Exchange) optimised management of clustered CHP systems in form of the virtual power plant. This algorithm has been used to control cogeneration plants within a distribution grid. (author)
Wille-Haussmann, Bernhard; Erge, Thomas; Wittwer, Christof [Fraunhofer Institute for Solar Energy Systems ISE, Heidenhofstrasse 2, 79110 Freiburg (Germany)
Modelling Complex Fenestration Systems using physical and virtual models
Physical or virtual models are commonly used to visualize the conceptual ideas of architects, lighting designers and researchers; they are also employed to assess the daylighting performance of buildings, particularly in cases where Complex Fenestration Systems (CFS) are considered. Recent studies have however revealed a general tendency of physical models to over-estimate this performance, compared to those of real buildings; these discrepancies can be attributed to several reasons. In order to identify the main error sources, a series of comparisons in-between a real building (a single office room within a test module) and the corresponding physical and virtual models was undertaken. The physical model was placed in outdoor conditions, which were strictly identical to those of the real building, as well as underneath a scanning sky simulator. The virtual model simulations were carried out by way of the Radiance program using the GenSky function; an alternative evaluation method, named Partial Daylight Factor method (PDF method), was also employed with the physical model together with sky luminance distributions acquired by a digital sky scanner during the monitoring of the real building. The overall daylighting performance of physical and virtual models were assessed and compared. The causes of discrepancies between the daylighting performance of the real building and the models were analysed. The main identified sources of errors are the reproduction of building details, the CFS modelling and the mocking-up of the geometrical and photometrical properties. To study the impact of these errors on daylighting performance assessment, computer simulation models created using the Radiance program were also used to carry out a sensitivity analysis of modelling errors. The study of the models showed that large discrepancies can occur in daylighting performance assessment. In case of improper mocking-up of the glazing for instance, relative divergences of 25-40% can be found in different room locations, suggesting that more light is entering than actually monitored in the real building. All these discrepancies can however be reduced by making an effort to carefully mock up the geometry and photometry of the real building. A synthesis is presented in this article which can be used as guidelines for daylighting designers to avoid or estimate errors during CFS daylighting performance assessment. (author)
Thanachareonkit, Anothai; Scartezzini, Jean-Louis [Solar Energy and Building Physics Laboratory (LESO-PB), Ecole Polytechnique Federale de Lausanne (EPFL), CH-1015 Lausanne (Switzerland)
Network worlds : from link analysis to virtual places.
Significant progress is being made in knowledge systems through recent advances in the science of very large networks. Attention is now turning in many quarters to the potential impact on counter-terrorism methods. After reviewing some of these advances, we will discuss the difference between such 'network analytic' approaches, which focus on large, homogeneous graph strucures, and what we are calling 'link analytic' approaches, which focus on somewhat smaller graphs with heterogeneous link types. We use this venue to begin the process of rigorously defining link analysis methods, especially the concept of chaining of views of multidimensional databases. We conclude with some speculation on potential connections to virtual world architectures.
Joslyn, C. (Cliff)
Advanced virtual energy simulation training and research: IGCC with CO2 capture power plant
In this presentation, we highlight the deployment of a real-time dynamic simulator of an integrated gasification combined cycle (IGCC) power plant with CO{sub 2} capture at the Department of Energy's (DOE) National Energy Technology Laboratory's (NETL) Advanced Virtual Energy Simulation Training and Research (AVESTARTM) Center. The Center was established as part of the DOE's accelerating initiative to advance new clean coal technology for power generation. IGCC systems are an attractive technology option, generating low-cost electricity by converting coal and/or other fuels into a clean synthesis gas mixture in a process that is efficient and environmentally superior to conventional power plants. The IGCC dynamic simulator builds on, and reaches beyond, conventional power plant simulators to merge, for the first time, a 'gasification with CO{sub 2} capture' process simulator with a 'combined-cycle' power simulator. Fueled with coal, petroleum coke, and/or biomass, the gasification island of the simulated IGCC plant consists of two oxygen-blown, downward-fired, entrained-flow, slagging gasifiers with radiant syngas coolers and two-stage sour shift reactors, followed by a dual-stage acid gas removal process for CO{sub 2} capture. The combined cycle island consists of two F-class gas turbines, steam turbine, and a heat recovery steam generator with three-pressure levels. The dynamic simulator can be used for normal base-load operation, as well as plant start-up and shut down. The real-time dynamic simulator also responds satisfactorily to process disturbances, feedstock blending and switchovers, fluctuations in ambient conditions, and power demand load shedding. In addition, the full-scope simulator handles a wide range of abnormal situations, including equipment malfunctions and failures, together with changes initiated through actions from plant field operators. By providing a comprehensive IGCC operator training system, the AVESTAR Center is poised to develop a workforce well-prepared to operate and control commercial-scale gasification-based power plants capable of 90% pre-combustion CO{sub 2} capture and compression, as well as low sulfur, mercury, and NOx emissions. With additional support from the NETL-Regional University Alliance (NETL-RUA), the Center will educate and train engineering students and researchers by providing hands-on 'learning by operating' experience The AVESTAR Center also offers unique collaborative R&D opportunities in high-fidelity dynamic modeling, advanced process control, real-time optimization, and virtual plant simulation. Objectives and goals are aimed at safe and effective management of power generation systems for optimal efficiency, while protecting the environment. To add another dimension of realism to the AVESTAR experience, NETL will introduce an immersive training system with innovative three-dimensional virtual reality technology. Wearing a stereoscopic headset or eyewear, trainees will enter an interactive virtual environment that will allow them to move freely throughout the simulated 3-D facility to study and learn various aspects of IGCC plant operation, control, and safety. Such combined operator and immersive training systems go beyond traditional simulation and include more realistic scenarios, improved communication, and collaboration among co-workers.
Zitney, S.; Liese, E.; Mahapatra, P.; Bhattacharyya, D.; Provost, G.
Trident pair production in a constant crossed field
For the trident process in a constant crossed field, we isolate the one-step mechanism involving a virtual intermediate photon from the two-step mechanism involving a real photon. The one-step process is found to be measurable combining currently-available electron beams with few-cycle laser pulses. The two-step process differs appreciably in magnitude and dynamics from integrating the product of sub-steps over photon lightfront momentum, challenging numerical simulation efforts.
King, B
Timelike Virtual Compton Scattering from Electron-Positron Radiative Annihilation
We propose measurements of the deeply virtual Compton amplitude (DVCS) {gamma}* {yields} H{bar H}{gamma} in the timelike t = (p{sub H} + p{sub {bar H}}){sup 2} > 0 kinematic domain which is accessible at electron-positron colliders via the radiative annihilation process e{sup +}e{sup -} {yields} H{bar H}{gamma}. These processes allow the measurement of timelike deeply virtual Compton scattering for a variety of H{bar H} hadron pairs such as {pi}{sup +}{pi}{sup -}, K{sup +}K{sup -}, and D{bar D} as well as p{bar p}. As in the conventional spacelike DVCS, there are interfering coherent amplitudes contributing to the timelike processes involving C = - form factors. The interference between the amplitudes measures the phase of the C = + timelike DVCS amplitude relative to the phase of the timelike form factors and can be isolated by considering the forward-backward e{sup +} {leftrightarrow} e{sup -} asymmetry. The J = 0 fixed pole contribution which arises from the local coupling of the two photons to the quark current plays a special role. As an example we present a simple model.
Afanasev, Andrei; /Hampton U. /Jefferson Lab; Brodsky, Stanley J.; /SLAC; Carlson, Carl E.; /William-Mary Coll.; Mukherjee, Asmita; /Indian Inst. Tech., Mumbai
Virtual laboratories: Collaborative environments and facilities-on-line
The Department of Energy (DOE) has major research laboratories in a number of locations in the US, typically co-located with large research instruments or research facilities valued at tens of millions to even billions of dollars. Present budget exigencies facing the entire nation are felt very deeply at DOE, just as elsewhere. Advances over the last few years in networking and computing technologies make virtual collaborative environments and conduct of experiments over the internetwork structure a possibility. The authors believe that development of these collaborative environments and facilities-on-line could lead to a ``virtual laboratory`` with tremendous potential for decreasing the costs of research and increasing the productivity of their capital investment in research facilities. The majority of these cost savings would be due to increased productivity of their research efforts, better utilization of resources and facilities, and avoiding duplication of expensive facilities. A vision of how this might all fit together and a discussion of the infrastructure necessary to enable these developments is presented.
Thomas, C.E. Jr. [Oak Ridge National Lab., TN (United States). I and C Div.; Cavallini, J.S.; Seweryniak, G.R.; Kitchens, T.A.; Hitchcock, D.A.; Scott, M.A.; Welch, L.C. [Dept. of Energy, Germantown, MD (United States). Mathematical Information, and Computational Sciences Div.; Aiken, R.J. [Dept. of Energy, Germantown, MD (United States). Mathematical Information, and Computational Sciences Div.]|[Lawrence Livermore National Lab., CA (United States); Stevens, R.L. [Argonne National Lab., IL (United States). Mathematics and Computer Sciences Div.
SVOPME: A scalable virtual organization privileges management environment
Grids enable uniform access to resources by implementing standard interfaces to resource gateways. In the Open Science Grid (OSG), privileges are granted on the basis of the user's membership to a Virtual Organization (VO). However, Grid sites are solely responsible to determine and control access privileges to resources using users identity and personal attributes, which are available through Grid credentials. While this guarantees full control on access rights to the sites, it makes VO privileges heterogeneous throughout the Grid and hardly fits with the Grid paradigm of uniform access to resources. To address these challenges, we are developing the Scalable Virtual Organization Privileges Management Environment (SVOPME), which provides tools for VOs to define and publish desired privileges and assists sites to provide the appropriate access policies. Moreover, SVOPME provides tools for Grid sites to analyze site access policies for various resources, verify compliance with preferred VO policies, and generate directives for site administrators on how the local access policies can be amended to achieve such compliance without taking control of local configurations away from site administrators. This paper discusses what access policies are of interest to the OSG community and how SVOPME implements privilege management for OSG.
Garzoglio, Gabriele; /Fermilab; Wang, Nanbor; /Tech-X, Boulder; Sfiligoi, Igor; Levshina, Tanya; /Fermilab; Anathan, Balamurali; /Tech-X, Boulder
I/O Performance of Virtualized Cloud Environments
The scientific community is exploring the suitability of cloud infrastructure to handle High Performance Computing (HPC) applications. The goal of Magellan, a project funded through DOE ASCR, is to investigate the potential role of cloud computing to address the computing needs of the Department of Energy?s Office of Science, especially for mid-range computing and data-intensive applications which are not served through existing DOE centers today. Prior work has shown that applications with significant communication orI/O tend to perform poorly in virtualized cloud environments. However, there is a limited understanding of the I/O characteristics in virtualized cloud environments. This paper will present our results in benchmarking the I/O performance over different cloud and HPC platforms to identify the major bottlenecks in existing infrastructure. We compare the I/O performance using IOR benchmark on two cloud platforms - Amazon and Magellan. We analyze the performance of different storage options available, different instance types in multiple availability zones. Finally, we perform large-scale tests in order to analyze the variability in the I/O patterns over time and region. Our results highlight the overhead and variability in I/O performance on both public and private cloud solutions. Our results will help applications decide between the different storage options enabling applications to make effective choices.
Ghoshal, Devarshi; Canon, Shane; Ramakrishnan, Lavanya
Modal test optimization using VETO (Virtual Environment for Test Optimization)
We present a software environment integrating analysis and test-based models to support optimal modal test design through a Virtual Environment for Test Optimization (VETO). A goal in developing this software tool is to provide test and analysis organizations with a capability of mathematically simulating the complete test environment in software. Derived models of test equipment, instrumentation and hardware can be combined within the VETO to provide the user with a unique analysis and visualization capability to evaluate new and existing test methods. The VETO assists analysis and test engineers in maximizing the value of each modal test. It is particularly advantageous for structural dynamics model reconciliation applications. The VETO enables an engineer to interact with a finite element model of a test object to optimally place sensors and exciters and to investigate the selection of data acquisition parameters needed to conduct a complete modal survey. Additionally, the user can evaluate the use of different types of instrumentation such as filters, amplifiers and transducers for which models are available in the VETO. The dynamic response of most of the virtual instruments (including the device under test) is modeled in the state space domain. Design of modal excitation levels and appropriate test instrumentation are facilitated by the VETO`s ability to simulate such features as unmeasured external inputs, A/D quantization effects, and electronic noise. Measures of the quality of the experimental design, including the Modal Assurance Criterion, and the Normal Mode Indicator Function are available.
Klenke, S.E.; Reese, G.M.; Schoof, L.A.; Shierling, C.
Virtual heliodon: Spatially augmented reality for architectural daylighting design
We present an application of interactive global illumination and spatially augmented reality to architectural daylight modeling that allows designers to explore alternative designs and new technologies for improving the sustainability of their buildings. Images of a model in the real world, captured by a camera above the scene, are processed to construct a virtual 3D model. To achieve interactive rendering rates, we use a hybrid rendering technique, leveraging radiosity to simulate the inter-reflectance between diffuse patches and shadow volumes to generate per-pixel direct illumination. The rendered images are then projected on the real model by four calibrated projectors to help users study the daylighting illumination. The virtual heliodon is a physical design environment in which multiple designers, a designer and a client, or a teacher and students can gather to experience animated visualizations of the natural illumination within a proposed design by controlling the time of day, season, and climate. Furthermore, participants may interactively redesign the geometry and materials of the space by manipulating physical design elements and see the updated lighting simulation.
Yu Sheng; Theodore C. Yapo; Christopher Young; Barbara Cutler
Towards a pluralist internet using a virtual machine server for network customization
The Internet success is frequently credited to its basic pillars, the end-to-end argument and the TCP/IP protocol stack. Nevertheless, this simple architecture does not facilitate the addition of new services such as mobility, security, and quality of ... Keywords: future internet, virtual machine server, virtualization
Rafael dos Santos Alves; Miguel Elias M. Campista; Lu�s Henrique M. K. Costa; Otto Carlos M. B. Duarte
A system for rapid creation and assessment of conceptual large vehicle designs using immersive virtual reality
Currently, new product concepts are often evaluated by developing detailed virtual part and assembly models with traditional computer aided design (CAD) tools followed by appropriate analyses (e.g., finite element analysis, computational fluid dynamics, ... Keywords: Conceptual design, Product configuration, Virtual reality
Christian Noon; Ruqin Zhang; Eliot Winer; James Oliver; Brian Gilmore; Jerry Duncan
Learning by teaching with virtual peers and the effects of technological design choices on learning
Advancements in technology have brought about new forms of learning and online instruction that allow communication through virtual representations without physically meeting in person. This study builds on previous work involving recursive feedback ... Keywords: Computer-mediated communication, Cooperative/collaborative learning, Interactive learning environments, Teaching/learning strategies, Virtual reality
Sandra Y. Okita; Selen Turkay; Mihwa Kim; Yumiko Murai
Emotional effects of shooting activities: 'real' versus 'virtual' actions and targets
The results of an empirical study are presented to investigate the relationship between different action types (real versus virtual shooting) and different target types (real versus virtual targets) on the actual emotional state (well being) of the player. ... Keywords: Wolfenstein game, combat sport, emotional effect, laser tag, mood, shooting game, well-being
Matthias Rauterberg
Enhancing human-machine interactions: virtual interface alteration through wearable computers
This paper studies a novel approach advocating the virtual alteration of real-world interfaces through a form of augmented reality. Following an introduction reminding the need for easy to use and more consistent interfaces across our many day to day ... Keywords: augmented reality, interaction enhancement, virtual interface alteration, wearable computer
Alexandre Plouznikoff; Nicolas Plouznikoff; Jean-Marc Robert; Michel Desmarais
Secure virtual architecture: a safe execution environment for commodity operating systems
This paper describes an efficient and robust approach to provide a safe execution environment for an entire operating system, such as Linux, and all its applications. The approach, which we call Secure Virtual Architecture (SVA), defines ... Keywords: compiler, memory safety, operating systems, security, type safety, typed assembly language, virtual machine
John Criswell; Andrew Lenharth; Dinakar Dhurjati; Vikram Adve
Design and evaluation of a multi-user virtual audio chat
As advanced Internet services, networked virtual reality (NVR) applications impose certain quality of service (QoS) requirements, due to rich multimedia content and perceived "real-time" interactivity. Two different representations of QoS are needed ... Keywords: audio chat, multi-user application, quality of service, subjective quality, virtual reality
Maja Matijasevic; Lea Skorin-Kapov
Virtual worlds - past, present, and future: New directions in social computing
Virtual worlds, where thousands of people can interact simultaneously within the same three-dimensional environment, represent a frontier in social computing with critical implications for business, education, social sciences, and our society at large. ... Keywords: Avatars, Gaming, Social computing, Virtual worlds
Paul R. Messinger; Eleni Stroulia; Kelly Lyons; Michael Bone; Run H. Niu; Kristen Smirnov; Stephen Perelgut
Virtual venue management users manual : access grid toolkit documentation, version 2.3.
An Access Grid Venue Server provides access to individual Virtual Venues, virtual spaces where users can collaborate using the Access Grid Venue Client software. This manual describes the Venue Server component of the Access Grid Toolkit, version 2.3. Covered here are the basic operations of starting a venue server, modifying its configuration, and modifying the configuration of the individual venues.
Judson, I. R.; Lefvert, S.; Olson, E.; Uram, T. D.; Mathematics and Computer Science
Virtual topology dynamics and handover mechanisms in Earth-fixed LEO satellite systems
Handling network mobility in a highly dynamic LEO satellite network is a critical issue to achieve seamless and efficient integration of satellite and terrestrial networks. In Earth-fixed satellite systems, this task could be simplified by representing ... Keywords: Earth-fixed satellite systems, Handover mechanisms, Soft handover, Virtual node, Virtual topology
�mer Kor�ak; Fatih Alag�z
Mitigating attacks against virtual coordinate based routing in wireless sensor networks
Virtual coordinate system (VCS) based routing provides a practical, efficient and scalable means for point-to-point routing in wireless sensor networks. Several VCS-based routing protocols have been proposed in the last few years, all assuming that nodes ... Keywords: beacon vector routing, routing, secure beacon vector routing, security, sensor network routing, virtual coordinate system
Jing Dong; Kurt E. Ackermann; Brett Bavar; Cristina Nita-Rotaru
fMRI assessment of small animals' phobia using virtual reality as stimulus
Up to now, still images or videos of real animals have been used in functional Magnetic Resonance Imaging (fMRI) protocols to evaluate brain activations associated to small animals' phobia. Our aim in the present work is to evaluate the use of virtual ... Keywords: clinical assessment, neuroimaging, small animals' phobia, virtual reality
Miriam Clemente; Beatriz Rey; Mariano Alca�iz; Aina Rodr�guez-Pujadas; Alfonso Barros-Loscertales; C�sar �vila; Juani Bret�n-L�pez; Cristina Botella; Rosa M. Ba�os
Contact model, fit process and, foot animation for the virtual simulator of the footwear comfort
This paper describes the new advances carried out for Simucal. Simucal was introduced in [13] and it is a footwear virtual simulator designed to perform studies of comfort and functionality in CAD footwear design. In this paper, a new finite element ... Keywords: Contact model, Foot animation, Shoe upper, Virtual simulation
M. J. Rup�rez; C. Monserrat; S. Alemany; M. C. Juan; M. Alca��z
A framework for defining and describing key design features of virtual citizen science projects
Virtual citizen science (VCS) uses computer-mediated interaction (usually a Web-based platform) to enable the public to work with professional scientists conducting research. However, there is currently a lack of research about the core features of VCS ... Keywords: Zooniverse, functionality, taxonomy, usability, virtual citizen science
Jason Reed; Whitney Rodriguez; Angelique Rickhoff
Virtual network on demand: dedicating network resources to distributed scientific workflows
The VNOD project aims to build an on-demand network virtualization infrastructure that can deliver the unprecedented networking performance and quality of service required by modern, distributed, data-intensive applications utilized by user communities. ... Keywords: co-scheduling, network, virtualization
Dimitrios Katramatos; Sushant Sharma; Dantong Yu
Virtual sensors for estimation of energy consumption and thermal comfort in buildings with underfloor heating
Evaluating a building's performance usually requires a high number of sensors especially if individual rooms are analyzed. This paper introduces a simple and scalable model-based virtual sensor that allows analysis of a buildings' heat consumption down ... Keywords: Building performance analysis, Energy efficiency, Hybrid HVAC systems, Virtual sensors
Joern Ploennigs; Ammar Ahmed; Burkhard Hensel; Paul Stack; Karsten Menzel
Adding semantic annotations, navigation paths and tour guides to existing virtual environments
Nowadays, more Virtual Environments (VEs) are becoming available on the Web. This means that VEs are becoming accessible to a larger and more diverse audience. It also means that it is more likely that the use of these VEs (i.e. how to interact with ... Keywords: navigation paths, semantic annotations, tour guides, virtual reality
Frederic Kleinermann; Olga De Troyer; Christophe Creelle; Bram Pellens
Blending real and virtual worlds using self-reflection and fiducials
This paper presents an enhanced version of a portable out-of-the-box platform for semi-immersive interactive applications. The enhanced version combines stereoscopic visualization, marker-less user tracking, and multi-touch with self-reflection of users ... Keywords: fiducials, fish tank virtual reality, interactive virtual art, mixed reality, multi-touch, self-reflection
Martin Fischbach; Dennis Wiebusch; Marc Erich Latoschik; Gerd Bruder; Frank Steinicke
An experience of using virtual worlds and tangible interfaces for teaching computer science
In this paper we present Cubica, an educational application that integrates virtual worlds with tangible interfaces. The application is focused on teaching computer science, in particular "sorting algorithms". The tangible interface is used to ... Keywords: e-learning, mixed reality, tangible user interfaces, virtual worlds
Juan Mateu; Xavier Alam�n
A fuzzy trust evaluation method for knowledge sharing in virtual enterprises
The success of virtual enterprises (VEs) depends on the effective sharing of related resources between various enterprises or workers who perform related activities. Specifically, VE success hinges on the integration and sharing of information and knowledge. ... Keywords: Fuzzy theory, Knowledge sharing, Trust, Virtual enterprise
Tsung-Yi Chen; Yuh-Min Chen; Chia-Jou Lin; Pin-Yuan Chen
Virtual assistant: an artificial agent for enhancing content acquisition: how ambient media elicit information from humans
In this paper, we propose a novel framework "Virtual Assistant" for enhancing content potentially procured by ambient media. The Virtual Assistant is an artificial agent simulating a human assistant shown in TV programs and prompts users to provide feedback ... Keywords: ambient media, artificial agent, content acquisition
Motoyuki Ozeki; Shunichi Maeda; Kanako Obata; Yuichi Nakamura
User population and user contributions to virtual publics: a systems model
This paper provides a comprehensive review of empirical research into user contributions to computer-mediated discourse in public cyber-spaces, referred to here as virtual publics. This review is used to build a systems model of such discourse. The major ... Keywords: computer mediated communication, coordination theory, discourse structures, group communication, information overload, systems theory, virtual communities
Quentin Jones; Sheizaf Rafaeli
Impact of Flow and Brand Equity in 3D Virtual Worlds
This research is a partial test of Park et al.'s 2008 model to assess the impact of flow and brand equity in 3D virtual worlds. It draws on flow theory as its main theoretical foundation to understand and empirically assess the impact of flow on brand ... Keywords: 3D Virtual Worlds, Brand Equity, Challenges, Flow, Intention, Skills
David DeWester; Brenda Eschenbrenner; So Ra Park; Fiona Fui-Hoon Nah
Challenges for success in stereo gaming: a Virtual Boy case study
Stereo video stands to revolutionize the medium of videogames in the same way that stereo sound revolutionized the audio experience. It is a pending revolution. Despite years of research, development, and hype, 3D stereo video ubiquity in videogames ... Keywords: 3D, LCD shutter glasses, Virtual Boy, case study, depth perception, head-mounted display, stereoscopic, virtual reality
Matt Zachara; Jos� P. Zagal
Inducing models of behavior from expert task performance in virtual environments
We developed an end-to-end process for inducing models of behavior from expert task performance through in-depth case study. A subject matter expert (SME) performed navigational and adversarial tasks in a virtual tank combat simulation, using the dTank ... Keywords: Avatar, Cue learning, Hierarchical task network, Instance-based learning, Spatial representations, Virtual environment
Bradley J. Best
The development and evaluation of a virtual radiotherapy treatment machine using an immersive visualisation environment
Due to the lengthy learning process associated with complicated clinical techniques, undergraduate radiotherapy students can struggle to access sufficient time or patients to gain the level of expertise they require. By developing a hybrid virtual environment ... Keywords: Evaluation of CAL systems, Interactive learning environments, Post-secondary education, Simulations, Virtual reality
P. Bridge; R. M. Appleyard; J. W. Ward; R. Philips; A. W. Beavis
A virtual square grid-based coverage algorithm of redundant node for wireless sensor network
A virtual square grid-based coverage algorithm (VSGCA) is proposed in this paper. Each sensor node divides its sensing range into virtual square grids, if all the grids are covered by neighbors, the target node is redundant node. Compared with some previous ... Keywords: Coverage, Energy conservation, Square grid, Wireless sensor network (WSN)
Yanheng Liu; Longxiang Suo; Dayang Sun; Aimin Wang
Symmetric and asymmetric action integration during cooperative object manipulation in virtual environments
Cooperation between multiple users in a virtual environment (VE) can take place at one of three levels. These are defined as where users can perceive each other (Level 1), individually change the scene (Level 2), or simultaneously act on and manipulate ... Keywords: Virtual environments, object manipulation, piano movers' problem, rules of interaction
Roy A. Ruddle; Justin C. D. Savage; Dylan M. Jones
Distributed risk management model and algorithm for virtual enterprise with private information
For the desired profit and anticipated goal, the virtual enterprise (VE) must avoid the risk successfully. In view of its characteristics, such as the diversity of partners and distribution of cooperative regions, the idea of distributed decision-making ... Keywords: distributed decision making, risk management, synthetic evaluation, taboo search, virtual enterprise
Xianli Sun; Min Huang; Xingwei Wang; Fuqiang Lu
Real Time Simulation and Online Control for Virtual Test Drives of Cars
Virtual prototyping plays a key role in modern car engineering. For virtual test drives of entire cars in the computer, mathematical and computational models of the vehicle, the road, and the driver are presented. The numerical simulation must be performed in real time for application in Hardware-in-the-Loop experiments. Numerical results are presented for the ISO slalom test.
Cornelius Chucholowski; Martin V�gel; Oskar von Stryk; Thiess-Magnus Wolter
Blending the real and virtual in games: the model of fantasy sports
Fantasy sports provide participants with the opportunity to play the role of coach for a team of athletes they select. The better the athletes perform in their real-world competitions, the better the virtual teams they are on will perform. Leagues for ... Keywords: fantasy sports, games, on-line rhetoric, spectatorship, virtual communities
Frank M. Shipman
A multi-agent based infrastructure to support virtual communities in elderly care
The growing numbers of the elderly population impose an urgent need to develop new approaches to care provision. The convergence of a number of technologies such as multi-agent systems, federated information management, safe communications, hypermedia ... Keywords: agent-based systems, care provision, care services, elderly care support, elderly population, federated information management, multi-agent systems, virtual community, virtual organisation
CloudNet: dynamic pooling of cloud resources by live WAN migration of virtual machines
Virtual machine technology and the ease with which VMs can be migrated within the LAN, has changed the scope of resource management from allocating resources on a single server to manipulating pools of resources within a data center. We expect WAN migration ... Keywords: cloud computing, virtualization, wan migration
Timothy Wood; K. K. Ramakrishnan; Prashant Shenoy; Jacobus van der Merwe
Agent Technologies for Virtual Enterprises in the One-of-a-Kind-Production Industry
One-of-a-kind-products (OKP) virtual enterprises are highly individualized and perform unique projects. Structural and behavioral modeling are important aspects of the use of agents to support their information systems. This paper discusses business ... Keywords: Software Agent Provider, Virtual Enterprises
Jeroen W.J. Gijsen; Nicholas B. Szirbik; Gerd Wagner
A multimodal virtual anatomy e-learning tool for medical education
Computer-aided learning (CAL) has great potential in facilitating learning. In medical education, several approaches using CAL have been used. In this paper, we present a novel software platform which we designed to provide a virtual learning environment ... Keywords: 3D graphics, direct volume rendering, medical educationd, virtual learning environment
Jianfeng Lu; Li Li; Goh Poh Sun
U.S. Army Modeling and Simulation Executable Architecture Deployment Cloud Virtualization Strategy
Our research has included leveraging Virtualization Technologies to provide integration, configuration and execution relief of Modeling & Simulation (M&S) event planning, instantiation and analysis. We have achieved this through a single service that ... Keywords: Virtualization, Cloud Computing, Modeling & Simulation (M&S), Distributed M&S, Hypervisor
Shaun Murphy; Scott Gallant; Chris Gaughan; Manny Diego
The development of VAG--a 3D virtual agribusiness environment and strategy game
VAG--a prototype animated, interactive, three-dimensional virtual environment model of a supply chain in the agribusiness sector has been developed as a CD-based game of strategy. Users (players) have to both create their supply chain by choosing the ... Keywords: Agribusiness, Computer games education, Supply chain, Virtual reality
Kim P. Bryceson
Parametric virtual laboratory development: A hydropower case study with student perspectives
In order to take advantage of trends such as genetic-design students need to be familiar, and comfortable, with the concept of parametric computer models and how their parameters relate to physical-forms. Virtual learning software can aid in creating ... Keywords: 3D modeling, Graphics, Hydropower, Parametric, Rotors, Virtual learning
Andrew M. Thomas, Venkatesh C. Vijay, Pathmeswaran Raju, Craig Chapman, Parmjit Chima, Alok Mathur, Adel Chemaly
Direct address translation for virtual memory in energy-efficient embedded systems
This article presents a methodology for virtual memory support in energy-efficient embedded systems. A holistic approach is proposed, where the combined efforts of compiler, operating system, and hardware architecture achieve a significant system power ... Keywords: Low-power embedded systems, address translation, virtual memory
Xiangrong Zhou; Peter Petrov
A Virtual Agent's Behavior Selection by Using Actions for Focusing of Attention
In this paper we present an approach for focusing of IVA's attention in order to select appropriate behavior in continuously changing virtual environment. An action for focusing of attention represents the act of moving the attention to the currently ... Keywords: action for focusing of attention, behavior selection, virtual agent
Haris Supic
Using semantics to bridge the information and knowledge sharing gaps in virtual engineering
In a Product Life Cycle (PLC) scenario, different Virtual Engineering Applications (VEA) are used in order to design, calculate and, in general, to provide an application scenario for computation engineering. The diverse VEA are not necessarily available ... Keywords: ontologies, product life cycle, virtual engineering
Javier Vaquero; Carlos Toro; Carlos Palenzuela; Eneko Azpeitia
Effects of multi-symbols on enhancing virtual reality based collaborative task
Applying virtual reality (VR) technologies to enhance learning becomes more and more popular. This research intends to investigate how multi-symbolic representations could help users being aware of collaborative context and partner's needs to enhance ... Keywords: collaboration, haptics, multi-symbols, virtual reality
Shih-Ching Yeh; Wu-Yuin Hwang; Jing-Liang Wang; Yuin-Ren Chen
Energy-efficient and multifaceted resource management for profit-driven virtualized data centers
As long as virtualization has been introduced in data centers, it has been opening new chances for resource management. Nowadays, it is not just used as a tool for consolidating underused nodes and save power; it also allows new solutions to well-known ... Keywords: Energy efficiency, Provider's profit, Resource management, SLA, Virtualized data center
��igo Goiri; Josep Ll. Berral; J. Oriol Fit�; Ferran Juli�; Ramon Nou; Jordi Guitart; Ricard Gavald�; Jordi Torres
Students' Experiences and Perceptions of Using a Virtual Environment for Project-Based Assessment in an Online Introductory Statistics Course
using an online virtual environment. In M. Sharma, A. Yeung,and play flute) and environment (e.g. nap, read book andof Using a Virtual Environment for Project- Based Assessment
Baglin, James; Bedford, Anthony; Bulmer, Michael
oro.open.ac.uk Investigating Affordances of Virtual Worlds for Real World B2C E-Commerce
and other research outputs Investigating affordances of virtual worlds for real world B2C e-commerce
Minh Minocha; Shailey Roberts; Dave Laing; Darren Investigating; Minh Quang Tran; Shailey Minocha; Dave Roberts; Angus Laing; Darren Langdridge
Analyzing the level of presence while navigating in a virtual environment during an fMRI scan
We have conducted an fMRI research using virtual reality to study the level of presence that subjects experience during the navigation through a virtual environment, in comparison with the presence felt during a video or a photograph viewing task. The ... Keywords: SUS questionnaire, fMRI, navigation, presence, virtual reality
Miriam Clemente; Alejandro Rodr�guez; Beatriz Rey; Aina Rodr�guez; Rosa M. Ba�os; Cristina Botella; Mariano Alca�iz; C�sar �vila
Constructing a virtual tower of Babel: a case study in cross-cultural collaboration across three continents
The collaboration project described in this paper revolves around the construction of a virtual Tower of Babel in a 3D Collaborative Virtual Environment (3D CVE). It involved students across three cooperating institutions, on three different continents ... Keywords: 3D collaborative virtual environments, multi-cultural classroom
Ekaterina Prasolova-F�rland; Theodor Wyeld; Teng-Wen Chang
Setting the best view of a virtual teacher in a mixed reality physical-task learning support system
In this research, we investigated the virtual teacher's positions and orientations that led to optimal learning outcome in mixed-reality environment. First, this study showed that the virtual teacher's position and orientation have an effect on learning ... Keywords: Collaborative computing, Human computer interaction, Mixed reality, Physical tasks learning, Virtual reality
Mamoun Nawahdah, Tomoo Inoue
Constraint-based 3D direct manipulations for intuitive and precise solid modelling in a virtual reality environment
The absence of constraints when interacting with virtual objects is one of the major limitations in the current Virtual Reality (VR) environments. Without constraints, it is difficult to perform precise interactive manipulations and precise solid modelling ... Keywords: allowable motions, constraint recognition, constraint solving, constraint-based manipulations, solid modelling, virtual reality
Y. Zhong; W. M�ller-Wittig
Implementing Virtual Reality Interfaces for the Geosciences June 11, 1996 LBL Report Number 38618 12 9.0 Acknowledgment
, N., ``Virtual Reality: Oxymoron or Pleonasm?,'' Wired, Volume 1, Number 6, December 1993. [MCC87] McImplementing Virtual Reality Interfaces for the Geosciences June 11, 1996 LBL Report Number 38618Hall, 1982. [BET95] W. Bethel, `Modular Virtual Reality Visualization Tools,'' LBL Technical Report Number
A successful methodology for designing and implementing virtual work teams
A system has been implemented at Los Alamos National Laboratory to rapidly staff and manage project teams. These project teams are created and subsequently perform their project functions using information technology as the communication medium. A simplified model of group interactions was used to guide the design and implementation of the system. The model uses three primary axes of group interactions to express the functional requirements that must be supported by a virtual work team application. The evolution of the approach and its relationship to traditional project management are described. A number of design characteristics were found to be critical to the success of the implementation and are presented. The technology and supporting processes and the business results stemming from implementation of the system are described in a limited manner.
Stuewe, R.B.; Barnes, M.G.; Hughes, D.K.
Development of a Context Aware Virtual Smart Home Simulator
Context awareness is the most important research area in ubiquitous computing. In particular, for smart home, context awareness attempts to bring the best services to the home habitants. However, the implementation in the real environment is not easy and takes a long time from building the scratch. Thus, to support the implementation in the real smart home, it is necessary to demonstrate that thing can be done in the simulator in which context information can be created by virtual sensors instead of physical sensors. In this paper, we propose ISS, an Interactive Smart home Simulator system aiming at controlling and simulating the behavior of an intelligent house. The developed system aims to provide architects, designers a simulation and useful tool for understanding the interaction between environment, people and the impact of embedded and pervasive technology on in daily life. In this research, the smart house is considered as an environment made up of independent and distributed devices interacting to supp...
Van Nguyen, Tam; Choi, Deokjai
Virtual Design and Modeling of Various Manufacturing Processes for Remote . . .
As currently envisioned, over 70,000 tons of high-level nuclear waste would be stored inside the planned Yucca Mountain repository. After emplacement, the site must be maintained and guarded for over 10,000 years. The reprocessing of spent nuclear fuel is a possible alternative to geological storage. Here, depleted Uranium would be separated from Plutonium and Minor Actinides. While Plutonium can be �burned � in commercial nuclear reactors, the minor actinides would be transmuted into other elements. The large-scale deployment of remote fabrication and refabrication processes (approx. 100 tons of Minor Actinides (MA) annually) will be required. Process automation has the potential to decrease the cost of remote fuel fabrication and to make transmutation a more economically viable process. Reprocessing and transmutation would reduce the high-level waste volume by over 99%, and reduce the lifetime of the repository to approximately 300 years. The objective of this thesis is the virtual design and simulation of manufacturing
Jamil Mohamad Renno
Virtual Welded - Joint Design Integrating Advanced Materials and Processing Technology
Virtual Welede-Joint Design, a systematic modeling approach, has been developed in this project to predict the relationship of welding process, microstructure, properties, residual stress, and the ultimate weld fatique strength. This systematic modeling approach was applied in the welding of high strength steel. A special welding wire was developed in this project to introduce compressive residual stress at weld toe. The results from both modeling and experiments demonstrated that more than 10x fatique life improvement can be acheived in high strength steel welds by the combination of compressive residual stress from the special welding wire and the desired weld bead shape from a unique welding process. The results indicate a technology breakthrough in the design of lightweight and high fatique performance welded structures using high strength steels.
Yang, Zhishang; Ludewig, Howard W.; Babu, S. Suresh
Deeply virtual Compton scattering from gauge/gravity duality
We use gauge/gravity duality to study deeply virtual Compton scattering (DVCS) in the limit of high center of mass energy at fixed momentum transfer, corresponding to the limit of low Bjorken x, where the process is dominated by the exchange of the pomeron. At strong coupling, the pomeron is described as the graviton Regge trajectory in AdS space, with a hard wall to mimic confinement effects. This model agrees with HERA data in a large kinematical range. The behavior of the DVCS cross section for very high energies, inside saturation, can be explained by a simple AdS black disk model. In a restricted kinematical window, this model agrees with HERA data as well.
Costa, Miguel S.; Djuric, Marko [University of Porto (Portugal)
VIMSS - Virtual Institute for Microbial Stress and Survival
featuredproject ESPP222 Environmental Stress Pathway Project (ESPP2) formerly known as Rapid Deduction of Stress Response Pathways in Metal/Radionuclide Reducing Bacteria Adam Arkin, co-Principal Investigator (LBNL, Physical Biosciences Division) and Terry Hazen, co-Principal Investigator (LBNL, Earth Sciences Division) ESPP2 is developing computational models that describe and predict the behavior of gene regulatory networks in microbes in response to the environmental conditions found in DOE waste sites. The research takes place within the Virtual Institute for Microbial Stress and Survival (VIMSS). >> More about ESPP2 >> View all projects featured project desufovibrio microbesonline.com MicrobesOnline is designed specifically to facilitate comparative studies on prokaryotic genomes.
Virtual Frog Dissection: Interactive 3D Graphics Via the Web
Dissection: Interactive 3D Graphics Via the Web Dissection: Interactive 3D Graphics Via the Web David Robertson, William Johnston, and Wing Nip Imaging and Distributed Computing Group Lawrence Berkeley National Laboratory Published in Proceedings, The Second International WWW Conference '94: Mosaic and the Web, Chicago, IL (1994). Hyperlinks have been updated periodically to replace stale links. ABSTRACT We have developed a set of techniques for providing interactive 3D graphics via the World Wide Web (WWW) as part of the ``Whole Frog'' project [ 1 ]. We had three goals: (1) to provide K-12 biology students with the ability to explore the anatomy of a frog with a virtual dissection tool; (2) to show the feasibility of interactive visualization over the Web; and (3) to show the possibility for the Web and its associated browsers to be an
AVESTAR® - Advanced Virtual Energy Simulation Training And Research Center
Avestar Video Avestar Video AVESTAR Center for Operational Excellence of Clean Energy Systems The AVESTAR Center is dedicated to accelerating progress toward achieving operational excellence for the nation's energy systems, from smart power plants to smart grid. Attaining operational excellence requires maximizing the efficiency and profitability from operations through excellent automation and control, all while reducing negative environmental impact and improving safety. Driving people excellence via the development, training, and empowerment of a highly-skilled engineering and operations workforce is another critical component of operational excellence. The AVESTAR Center is addressing all of these challenges by bringing together dynamic simulation, control, and 3D virtual reality technologies, state-of-the-art training simulators and facilities, and leading industry experts to focus on the optimal operation of clean energy systems in the smart grid era.
Model test optimization using the virtual environment for test optimization
We present a software environment integrating analysis and test-based models to support optimal modal test design through a Virtual Environment for Test Optimization (VETO). The VETO assists analysis and test engineers to maximize the value of each modal test. It is particularly advantageous for structural dynamics model reconciliation applications. The VETO enables an engineer to interact with a finite element model of a test object to optimally place sensors and exciters and to investigate the selection of data acquisition parameters needed to conduct a complete modal survey. Additionally, the user can evaluate the use of different types of instrumentation such as filters, amplifiers and transducers for which models are available in the VETO. The dynamic response of most of the virtual instruments (including the device under test) are modeled in the state space domain. Design of modal excitation levels and appropriate test instrumentation are facilitated by the VETO`s ability to simulate such features as unmeasured external inputs, A/D quantization effects, and electronic noise. Measures of the quality of the experimental design, including the Modal Assurance Criterion, and the Normal Mode Indicator Function are available. The VETO also integrates tools such as Effective Independence and minamac to assist in selection of optimal sensor locations. The software is designed about three distinct modules: (1) a main controller and GUI written in C++, (2) a visualization model, taken from FEAVR, running under AVS, and (3) a state space model and time integration module built in SIMULINK. These modules are designed to run as separate processes on interconnected machines.
Transport of Magnetic Fields in Convective, Accreting Supernova Cores
We consider the amplification and transport of a magnetic field in the collapsed core of a massive star, including both the region between the neutrinosphere and the shock, and the central, opaque core. An analytical argument explains why rapid convective overturns persist within a newly formed neutron star for roughly 10 seconds ($> 10^3$ overturns), consistent with recent numerical models. A dynamical balance between turbulent and magnetic stresses within this convective layer corresponds to flux densities in excess of $10^{15}$G. Material accreting onto the core is heated by neutrinos and also becomes strongly convective. We compare the expected magnetic stresses in this convective `gain layer' with those deep inside the neutron core. Buoyant motions of magnetized fluid are greatly aided by the intense neutrino flux. We calculate the transport rate through a medium containing free neutrons protons, and electrons, in the limiting cases of degenerate or non-degenerate nucleons. Fields stronger than $\\sim 10^{13}$ G are able to rise through the outer degenerate layers of the neutron core during the last stages of Kelvin-Helmholtz cooling (up to 10 seconds post-collapse), even though these layers have become stable to convection. We also find the equilibrium shape of a thin magnetic flux rope in the dense hydrostatic atmosphere of the neutron star, along with the critical separation of the footpoints above which the rope undergoes unlimited expansion against gravity. The implications of these results for pulsar magnetism are summarized, and applied to the case of late fallback over the first 1,000-10,000 s of the life of a neutron star
Christopher Thompson; Norman Murray
Thermodynamics of the Three-dimensional Black Hole with a Coulomb-like Field
In this paper, we study the thermodynamical properties of the (2+1)dimensional black hole with a Coulomb-like electric field and the differential form of the first law of thermodynamics is derived considering a virtual displacement of its event horizon. This approach shows that it is possible to give a thermodynamical interpretation to the field equations near the horizon. The Lambda=0 solution is studied and its interesting thermodynamical properties are commented.
Alexis Larranaga; Luz Angela Garcia
In this report is described the work effort to develop and demonstrate a software framework to support advanced process simulations to evaluate the performance of advanced power systems. Integrated into the framework are a broad range of models, analysis tools, and visualization methods that can be used for the plant evaluation. The framework provides a tightly integrated problem-solving environment, with plug-and-play functionality, and includes a hierarchy of models, ranging from fast running process models to detailed reacting CFD models. The framework places no inherent limitations on the type of physics that can be modeled, numerical techniques, or programming languages used to implement the equipment models, or the type or amount of data that can be exchanged between models. Tools are provided to analyze simulation results at multiple levels of detail, ranging from simple tabular outputs to advanced solution visualization methods. All models and tools communicate in a seamless manner. The framework can be coupled to other software frameworks that provide different modeling capabilities. Three software frameworks were developed during the course of the project. The first framework focused on simulating the performance of the DOE Low Emissions Boiler System Proof of Concept facility, an advanced pulverized-coal combustion-based power plant. The second framework targeted simulating the performance of an Integrated coal Gasification Combined Cycle - Fuel Cell Turbine (IGCC-FCT) plant configuration. The coal gasifier models included both CFD and process models for the commercially dominant systems. Interfacing models to the framework was performed using VES-Open, and tests were performed to demonstrate interfacing CAPE-Open compliant models to the framework. The IGCC-FCT framework was subsequently extended to support Virtual Engineering concepts in which plant configurations can be constructed and interrogated in a three-dimensional, user-centered, interactive, immersive environment. The Virtual Engineering Framework (VEF), in effect a prototype framework, was developed through close collaboration with NETL supported research teams from Iowa State University Virtual Reality Applications Center (ISU-VRAC) and Carnegie Mellon University (CMU). The VEF is open source, compatible across systems ranging from inexpensive desktop PCs to large-scale, immersive facilities and provides support for heterogeneous distributed computing of plant simulations. The ability to compute plant economics through an interface that coupled the CMU IECM tool to the VEF was demonstrated, and the ability to couple the VEF to Aspen Plus, a commercial flowsheet modeling tool, was demonstrated. Models were interfaced to the framework using VES-Open. Tests were performed for interfacing CAPE-Open-compliant models to the framework. Where available, the developed models and plant simulations have been benchmarked against data from the open literature. The VEF has been installed at NETL. The VEF provides simulation capabilities not available in commercial simulation tools. It provides DOE engineers, scientists, and decision makers with a flexible and extensible simulation system that can be used to reduce the time, technical risk, and cost to develop the next generation of advanced, coal-fired power systems that will have low emissions and high efficiency. Furthermore, the VEF provides a common simulation system that NETL can use to help manage Advanced Power Systems Research projects, including both combustion- and gasification-based technologies.
Mike Bockelie; Dave Swensen; Martin Denison; Adel Sarofim; Connie Senior
Approved for public release; distri6ufion is unlimited.
-1946)............................................................................... 3 Early Cold War Era (1946-1956)............................................................................. 6 Late Cold War Era (1956-1990) .............................................................................. 7 Controlled ThermonuclearResearch Fusion and Controlled Thermonuclear
SANDIA REPORT SAND964839 UC-400 Unlimited Release
relevance. Although the Li - thionyl chloride system yields high open circuit voltage and energy density, it has start-up problems after storage (i.e. voltage-delay), shows...
LA-14427-ENV Approved for public release; distribution is unlimited.
, -252, -253, and -254, curium-240, -241, -242, -243, -244, -245, -246 and -247, einsteinium-252, - 253, -254 and -255, fermium-257, gadolinium-148, mendelevium-258, neptunium-235 and - 237, polonium-210
MONTEREY, CALIFORNIA Approved for public release; distribution is unlimited
12b. DISTRIBUTION CODE A 13. ABSTRACT The Navy Non-nuclear Ordnance Requirements (NNOR) assessment determines annually the preferred inventory levels for most Navy munitions. This requirement determination current budgetary constraints (about $2 billion annually) by subjectively imposing a series of procurement
SANDIA REPORT SAND2007-4407P Unlimited Release
Tonopah Test Range U UDP underground discharge points USAF U.S. Air Force USFS U.S. Forest Service USGS U.S. Geological Survey USN United States Navy UST underground storage...
Ducks Unlimited Pledges to Help Save Coastal Louisiana ...
U.S. Energy Information Administration (EIA)
Don Young at America's Energy Coast Press Conference in New Orleans, Louisiana. DU Executive Vice President Don Young speaks in favor of a Louisiana ...
LA-14445-ENV Approved for public release; distribution is unlimited.
.................................................................................................................................5-70 8. White Rock Canyon Springs ................................................................................................................................... 7-6 5. TAL Elements: Follow-up of 2009 Results of Soil Manganese at Two Mile Mesa at TA-6
DISTRIBUTION RESTRICTION: Approved for public release; distribution is unlimited
reinforcement corrosion in reinforced concrete, recycling and reuse of waste materials and industrial by materials, and waste management. He developed new types of cements based on calcined clays and laterites, insoluble gypsum, and binders for wastes immobilization. To date, more than 200 scientific papers
SANDIA REPORT SAND2007-1199P Unlimited Release
in tables within each section, and trend graphs in Section 4-8. DOE drinking water guidelines are calculated as four percent of the published derived concentration guide...