text:
Office of Scientific and Technical Information
U.S. Energy Information Administration (EIA) Indexed Site
OIL & GAS FIELD OUTLINES FROM BUFFERED WELLS The VBA Code below builds oil & gas field boundary outlines (polygons) from buffered wells (points). Input well points layer must be a...
OIL & GAS FIELD OUTLINES FROM BUFFERED WELLS OIL & GAS FIELD OUTLINES FROM BUFFERED WELLS The VBA Code below builds oil & gas field boundary outlines (polygons) from buffered wells (points). Input well points layer must be a feature class (FC) with the following attributes: Field_name Buffer distance (can be unique for each well to represent reservoirs with different drainage radii) ...see figure below. Copy the code into a new module. Inputs: In ArcMap, data frame named "Task 1" Well FC as first layer (layer 0). Output: Polygon feature class in same GDB as the well points FC, with one polygon field record (may be multiple polygon rings) per field_name. Overlapping buffers for the same field name are dissolved and unioned (see figure below). Adds an attribute PCTFEDLAND which can be populated using the VBA
The VBA code provided at the bottom of this document is an updated version The VBA code provided at the bottom of this document is an updated version (from ArcGIS 9.0 to ArcGIS 9.2) of the polygon smoothing algorithm described below. A bug that occurred when multiple wells had the same location was also fixed. SMOOTH OIL & GAS FIELD OUTLINE POLYGONS MADE FROM BUFFERED WELLS Why smooth buffered field outlines? See the issues in the figure below: [pic] The smoothing application provided as VBA code below does the following: Adds area to the concave portions; doesn't add area to convex portions to maintain buffer spacing Fills in non-field "islands" smaller than buffer size Joins separate polygon rings with a "bridge" if sufficiently close Minimizes increase in total field area Methodology: creates trapezoids between neighboring wells within an oil/gas
Thermal field theories and shifted boundary conditions
E-Print Network (OSTI)
The analytic continuation to an imaginary velocity of the canonical partition function of a thermal system expressed in a moving frame has a natural implementation in the Euclidean path-integral formulation in terms of shifted boundary conditions. The Poincare' invariance underlying a relativistic theory implies a dependence of the free-energy on the compact length L_0 and the shift xi only through the combination beta=L_0(1+xi^2)^(1/2). This in turn implies that the energy and the momentum distributions of the thermal theory are related, a fact which is encoded in a set of Ward identities among the correlators of the energy-momentum tensor. The latter have interesting applications in lattice field theory: they offer novel ways to compute thermodynamic potentials, and a set of identities to renormalize non-perturbatively the energy-momentum tensor. At fixed bare parameters the shifted boundary conditions also provide a simple method to vary the temperature in much smaller steps than with the standard procedure.
Leonardo Giusti; Harvey B. Meyer
The analytic continuation to an imaginary velocity of the canonical partition function of a thermal system expressed in a moving frame has a natural implementation in the Euclidean path-integral formulation in terms of shifted boundary conditions. The Poincare' invariance underlying a relativistic theory implies a dependence of the free-energy on the compact length L_0 and the shift xi only through the combination beta=L_0(1+xi^2)^(1/2). This in turn implies that the energy and the momentum distributions of the thermal theory are related, a fact which is encoded in a set of Ward identities among the correlators of the energy-momentum tensor. The latter have interesting applications in lattice field theory: they offer novel ways to compute thermodynamic potentials, and a set of identities to renormalize non-perturbatively the energy-momentum tensor. At fixed bare parameters the shifted boundary conditions also provide a simple method to vary the temperature in much smaller steps than with the standard procedur...
Giusti, Leonardo
Geometric Boundary Data for the Gravitational Field
An outstanding issue in the treatment of boundaries in general relativity is the lack of a local geometric interpretation of the necessary boundary data. For the Cauchy problem, the initial data is supplied by the 3-metric and extrinsic curvature of the initial Cauchy hypersurface.. This Cauchy data determines a solution to Einstein's equations which is unique up to a diffeomorphism. Here, we show how three pieces of boundary data, which are associated locally with the geometry of the boundary, likewise determine a solution of the initial-boundary value problem which is unique up to a diffeomorphism. One piece of this data, constructed from the extrinsic curvature of the boundary, determines the dynamical evolution of the boundary. The other two pieces constitute a conformal class of rank-2, positive definite metrics, which represent the two gravitational degrees of freedom.
H-O. Kreiss; J. Winicour
ARM - Field Campaign - Boundary Layer Cloud IOP
NLE Websites -- All DOE Office Websites (Extended Search)
govCampaignsBoundary Layer Cloud IOP govCampaignsBoundary Layer Cloud IOP Campaign Links Campaign Images Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Boundary Layer Cloud IOP 2005.07.11 - 2005.08.07 Lead Scientist : William Shaw For data sets, see below. Description Investigators from Pacific Northwest National Laboratory, in collaboration with scientists from a number of other institutions, carried out a month of intensive measurements at the ARM Climate Research Facility on the North Slope of Alaska in the summer of 2005. The purpose of these measurements was to determine how much the arctic land surface modifies the way low clouds reflect, absorb, and transmit solar and infrared radiation. This is an important problem because arctic clouds play a prominent role in
Boundary conditions for Einstein's field equations: Analytical and numerical analysis
Outer boundary conditions for strongly and symmetric hyperbolic formulations of 3D Einstein's field equations with a live gauge condition are discussed. The boundary conditions have the property that they ensure constraint propagation and control in a sense made precise in this article the physical degrees of freedom at the boundary. We use Fourier-Laplace transformation techniques to find necessary conditions for the well posedness of the resulting initial-boundary value problem and integrate the resulting three-dimensional nonlinear equations using a finite-differencing code. We obtain a set of constraint-preserving boundary conditions which pass a robust numerical stability test. We explicitly compare these new boundary conditions to standard, maximally dissipative ones through Brill wave evolutions. Our numerical results explicitly show that in the latter case the constraint variables, describing the violation of the constraints, do not converge to zero when resolution is increased while for the new boundary conditions, the constraint variables do decrease as resolution is increased. As an application, we inject pulses of ``gravitational radiation'' through the boundaries of an initially flat spacetime domain, with enough amplitude to generate strong fields and induce large curvature scalars, showing that our boundary conditions are robust enough to handle nonlinear dynamics. We expect our boundary conditions to be useful for improving the accuracy and stability of current binary black hole and binary neutron star simulations, for a successful implementation of characteristic or perturbative matching techniques, and other applications. We also discuss limitations of our approach and possible future directions.
Olivier Sarbach; Manuel Tiglio
Unit Outline Training Guide
Unit Outline Builder Training Guide Document Status: Final Revision Number: 6.0 Revision Date: 14 Approved #12;Online Unit Outline Builder Training Guide Curtin University of Technology Page 2 TABLE................................................................................................................. 4 4. Log in and Select a Unit Outline
ARM - Field Campaign - Lower Atmospheric Boundary Layer Experiment
govCampaignsLower Atmospheric Boundary Layer Experiment govCampaignsLower Atmospheric Boundary Layer Experiment Campaign Links LABLE Website Related Campaigns 2013 Lower Atmospheric Boundary Layer Experiment 2013.05.28, Turner, SGP Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Lower Atmospheric Boundary Layer Experiment 2012.09.17 - 2012.11.13 Lead Scientist : David Turner Description Boundary layer turbulence is an important process that is parameterized in most atmospheric numerical models. Turbulence redistributes energy and mass within the boundary layer. Many different characteristics can impact the character of turbulence in the boundary layer, including different surface types, horizontal wind speed and direction, and the vertical temperature structure of the atmosphere. However, there have been few studies that have
Achieving safety: a field study of boundary objects in aircraft technical support
Science Conference Proceedings (OSTI)
Boundary objects are a critical, but understudied, theoretical construct in CSCW. Through a field study of aircraft technical support, we examined the role of boundary objects in the "achievement of safety" by service engineers. The resolution process ... Keywords: boundary objects, collaborative work, high reliability organizations, hotlines, information reuse, organizational memory, safety, service engineering, technical support
Wayne G. Lutters; Mark S. Ackerman
ARM - Field Campaign - Boundary Layer CO2 Using CW Lidar
govCampaignsBoundary Layer CO2 Using CW Lidar govCampaignsBoundary Layer CO2 Using CW Lidar Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Boundary Layer CO2 Using CW Lidar 2005.05.21 - 2005.05.24 Lead Scientist : Michael Dobbs Description Overflights Underway at ACRF Southern Great Plains Site (M.Dobbs/J.Liljegren) Science collaborators at ITT Industries and the National Aeronautics and Space Administration (NASA) Langley Research Center (LaRC) conducted flights over the Central Facility at ACRF's Southern Great Plains (SGP) site as part of the Climate Sources and Sink (CO2) Intensive Operational Period (IOP), using a CW lidar. The objective of the flights was to validate, by demonstration and comparison with SGP ground observations, the performance of the ITT system when used in conjunction with retrieval
DOE Green Energy (OSTI)
The boundaries of reservoir fluid convection cells are discreet and intricate zones, commonly sealed or reduced in permeabilities, which are often quite readily identifiable in many hydrothermal systems. Cell boundaries in the Geysers Steam Field are more vague; however, they are gradually being revealed by cumulative and extensive wellbore data. A profound example of a type of boundary has been revealed by drilling in one area of the steam field. A proposed model utilizes a sericitic alteration scheme to establish cell self-sealing. Mineralogical, permeability, and temperature properties all coincide so as to allow formation of a boundary model. This reinforces previously held views that the reservoir cell rock and hydrothermal system are greatly out of equilibrium. Such similar phenomena are suggested from drilling experiences in other parts of the steam field. Considerably, more work is required to better define and comprehend the nature and location of reservoir cell boundaries within the Geysers Steam Field.
Hebein, J.L.
Brief paper: Controlling the motion of charged particles in a vacuum electromagnetic field from the boundary
We consider the problem of driving two non-relativistic charged particles in a bounded vacuum electromagnetic field to the same location by applying electromagnetic forces through the boundary of the domain. The dynamics of the particles is modeled by ... Keywords: Boundary feedback, Charged particle, Maxwell-Lorentz system, Nuclear fusion, Perturbed energy
Luis R. Suazo; Weijiu Liu
Boundary S Matrix and the Anti{endash}de Sitter Space to Conformal Field Theory Dictionary
An S matrix analog is defined for anti{endash}de Sitter (Ads) space by constructing {open_quotes}in{close_quotes} and {open_quotes}out{close_quotes} states that asymptote to the timelike boundary. A derivation parallel to that of the Lehmann-Symanzik-Zimmermann formula shows that this {open_quotes}boundary S matrix{close_quotes} is given directly by correlation functions in the boundary conformal theory. This provides a key entry in the AdS to conformal field theory dictionary. {copyright} {ital 1999} {ital The American Physical Society }
Giddings, S.B. [Department of Physics, University of California, Santa Barbara, California 93106-9530 (United States)
Scientist Equipment and Outline
Outline and Equipment Outline and Equipment LIGHT AND COLOR Grade levels: can be adapted for grades 2-8. Length of time: 30-45 minues. Room preference: Double classroom or all-purpose room. Equipment is located in the Lederman Science Center. Talk to Susan Dahl to borrow this set. Spectrum tube power supply, gas tubes and diffraction grating glasses Light box with red, green, and blue translucent film Power chord, extension chord Large set of lenses Small concave and convex lenses Magnetic optics kit, includes a small laser Slinky Flashlight Clear plastic tub, powdered milk Water Radiometer Electromagnetic energy spectrum poster Set of red, green and blue flood lights Where does light come from? Use a boy and a girl to make a human demonstration of molecules and atoms. Have students rub their hands together and notice friction equals heat.
Electromagnetic field of a charge intersecting a cold plasma boundary in a waveguide
SciTech Connect
We analyze the electromagnetic field of a charge crossing a boundary between a vacuum and cold plasma in a waveguide. We obtain exact expressions for the field components and the spectral density of the transition radiation. With the steepest descent technique, we investigate the field components. We show that the electromagnetic field has a different structure in a vacuum than in cold plasma. We also develop an algorithm for the computation of the field based on a certain transformation of the integration path. The behavior of the field depending on distance and time and the spectral density depending on frequency are explored for different charge velocities. Some important physical effects are noted. A considerable increase and concentration of the field near the wave front in the plasma is observed for the case of ultrarelativistic particles. In the plasma, the mode envelopes and spectral density show zero points when the charge velocity is within certain limits.
Alekhina, Tatiana Yu.; Tyukhtin, Andrey V. [Radiophysics Department of St. Petersburg University, 1 Ulyanovskaya, St. Petersburg 198504 (Russian Federation)
Using particle-in-cell simulations, we study the kinetic physics of relativistic shear flow in collisionless electron-positron (e+e-) plasmas. We find efficient magnetic field generation and particle energization at the shear boundary, driven by streaming instabilities across the shear interface and sustained by the shear flow. Nonthermal, anisotropic high-energy particles are accelerated across field lines to produce a power-law tail turning over just below the shear Lorentz factor. These results have important implications for the dissipation and radiation of jets in blazars and gamma-ray bursts.
Liang, Edison; Smith, Ian [Rice University, MS 108, 6100 Main Street, Houston, TX 77005 (United States); Boettcher, Markus, E-mail: firstname.lastname@example.com, E-mail: firstname.lastname@example.com, E-mail: email@example.com [Physics and Astronomy Department, Ohio University, Athens, OH 45701 (United States)
Field_SWAT: A tool for mapping SWAT output to field boundaries
The Soil and Water Assessment Tool (SWAT) hydrological/water quality model divides a watershed into hydrological response units (HRUs) based on unique land cover, soil type, and slope. HRUs are a set of discontinuous land masses that are spatially located ... Keywords: Field responses, HRU, Hydrological response units, SWAT
Naresh Pai; Dharmendra Saraswat; Raghavan Srinivasan
The Vertical Structure of the Wave Bottom Boundary Layer over a Sloping Bed: Theory and Field Measurements
Theoretical solutions for the wave bottom boundary layer (WBL) over a sloping bed are compared with field measurements in the nearshore zone. The WBL theory is constructed using both viscoelastic�diffusion and conventional eddy viscosity ...
Qingping Zou; Alex E. Hay
Variability in the internal wave field induced by the Atlantic Deep Western Boundary Current at 16�N
Five years of continuous mooring data combined with CTD/LADCP measurements from five cruises are used to investigate the influence of the Deep Western Boundary Current (DWBC) on the internal wave field and associated vertical mixing at the ...
Janna K�hler; Christian Mertens; Maren Walter; Uwe St�ber; Monika Rhein; Torsten Kanzow
Energy.gov (U.S. Department of Energy (DOE)) Indexed Site
BLM RD&D Lease Paper 1 Final 04/29/12 BLM RD&D Lease Paper 1 Final 04/29/12 Assessment of Plans and Progress on US Bureau of Land Management Oil Shale RD&D Leases in the United States Peter M. Crawford, Christopher Dean, and Jeffrey Stone, INTEK, Inc. James C. Killen, US Department of Energy Purpose This paper describes the original plans, progress and accomplishments, and future plans for nine oil shale research, development and demonstration (RD&D) projects on six existing RD&D leases awarded in 2006 and 2007 by the United States Department of the Interior, Bureau of Land Management (BLM) to Shell, Chevron, EGL (now AMSO), and OSEC (now Enefit American, respectively); as well as three pending leases to Exxon, Natural Soda, and AuraSource, that were offered in 2010. The outcomes
... step for the 7- and 8- cycle fuel elements � Shim arms, regulating rod, beam tubes, etc. ... 31 mcnp 12/14/0 tally n nps bin norm mctal = f sur d flag u s ...
Marcus Miller and John Williamson for many discussions of the ideas contained in this paper. They are not responsible for the end-product. The views expressed are my own. They do not represent the views of any organisation I am associated with.
Willem H. Buiter; Willem H. Buiter
... Poly(ethylene oxide) in d-ethanol phase separated (2-phase) mixed phase (1-phase) ... d-Water Fraction PEO in d-ethanol/d-water Mixtures UCST ...
... Nanotubes Forro, Europhysics News (2001) Vol. 32 No. 3 W ang, in preparation Page 4. 4 Nanotubes Nonchiral ( �armchair' ) ...
data; but little "useable" information for selecting windows based on heatingcooling energy use * Wide performance range for any one window often exceeds the range across all...
Research Project Research Project Summer Student Research for the Next Linear Collider (NLC) Student Researchers: Rachel Lansom Sara Waugh Advisor: Josef Frisch I.Introduction A. Schematic Diagram II. Electronics: Basic Terms A. Mixing 2 frequencies 1. Calculation III. Noise Tests A. What is Noise? B. Synthesizer Test 1. Goal of Experiment and Diagram of Test Circuit 2. Comparing dBm to mW and Power variation calculation 3. Capacitor plate calculation: acceptable offset distance C. Amplifier Test 1. Graph of rms/gain vs. gain 2. Attenuator Test D. Noise Equation 1. Diagram 2. General equation for determining noise/motion relationship IV. Capacitor A. Sample Calculations 1. Capacitance 2. Frequency B. Diagram C. Photographs D. Measurements 1. Graph: DC Volts per Micron 2. Final Noise Calculations
Yukawa-field approximation of electrostatic free energy and dielectric boundary force This article has been downloaded from IOPscience. Please scroll down to see the full text article.
Yukawa-field approximation of electrostatic free energy and dielectric boundary force This article.1088/0951-7715/24/11/011 Yukawa-field approximation of electrostatic free energy and dielectric boundary force Hsiao-Bing Cheng1. The electrostatic free energy determines the dielectric boundary force that in turn influences crucially
Li, Bo
Use of Synthetic Data to Test Flight Patterns for a Boundary Layer Field Experiment
A virtual research aircraft was flown through a synthetic atmospheric boundary layer to help design a real flight plan that would allow robust turbulence statistics to be obtained in a heterogeneous, evolving, convective boundary layer. The ...
Edi Santoso; Roland Stull
Outline of a Course in Plasma Physics
This outline is part of an educational experiment initiated by the Commission on College Physics. The Commission has undertaken to highlight the need of college curriculum development in various areas of modern physics. One of these areas is the field of plasma physics. Difficulties in preparing a course in this particular field result from the fact that it has grown from fairly disparate areas of physics including gas discharges magnetohydrodynamics and fusion physics. Synthesis of these various fields into a single course in plasma physics has not taken place spontaneously throughout the country and to look into this problem
Plasma Physics Study Group
Plume Dispersion in the Convective Boundary Layer. Part I: CONDORS Field Experiment and Example Measurements
Project CONDORS (CONvective Diffusion Observed by Remote Sensors) measured the dispersion of a nonbuoyant plume in the highly convective boundary layer. Laboratory and numerical models have predicted vertical profiles of a passive tracer that are ...
W. L. Eberhard; W. R. Moninger; G. A. Briggs
An energy absorbing far-field boundary condition for the elastic wave equation
The authors present an energy absorbing non-reflecting boundary condition of Clayton-Engquist type for the elastic wave equation together with a discretization which is stable for any ratio of compressional to shear wave speed. They prove stability for a second order accurate finite-difference discretization of the elastic wave equation in three space dimensions together with a discretization of the proposed non-reflecting boundary condition. The stability proof is based on a discrete energy estimate and is valid for heterogeneous materials. The proof includes all six boundaries of the computational domain where special discretizations are needed at the edges and corners. The stability proof holds also when a free surface boundary condition is imposed on some sides of the computational domain.
Petersson, N A; Sjogreen, B
Scanning retarding field analyzer for plasma profile measurements in the boundary of the Alcator C-Mod tokamak
A new Retarding Field Analyzer (RFA) head has been created for the outer-midplane scanning probe system on the Alcator C-Mod tokamak. The new probe head contains back-to-back retarding field analyzers aligned with the local magnetic field. One faces 'upstream' into the field-aligned plasma flow and the other faces 'downstream' away from the flow. The RFA was created primarily to benchmark ion temperature measurements of an ion sensitive probe; it may also be used to interrogate electrons. However, its construction is robust enough to be used to measure ion and electron temperatures up to the last-closed flux surface in C-Mod. A RFA probe of identical design has been attached to the side of a limiter to explore direct changes to the boundary plasma due to lower hybrid heating and current drive. Design of the high heat flux (>100 MW/m{sup 2}) handling probe and initial results are presented.
Brunner, D.; LaBombard, B.; Ochoukov, R.; Whyte, D. [MIT PSFC Cambridge, Massachusetts 02139 (United States)
DRAFT Outline - Preliminary Framework to Reduce Cyber ...
Page 1. 1 DRAFT Outline - Preliminary Framework to Reduce Cyber Risks to Critical Infrastructure, July 1, 2013 NOTES ...
3-D nonlinear force-free field reconstruction of solar active region 11158 by direct boundary integral equation
A 3-D coronal magnetic field is reconstructed for NOAA 11158 on Feb 14, 2011. A GPU-accelerated direct boundary integral equation (DBIE) method is implemented. This is about 1000 times faster than the original DBIE used on solar NLFFF modeling. Using the SDO/HMI vector magnetogram as the bottom boundary condition, the reconstructed magnetic field lines are compared with the projected EUV loop structures from different views three-dimensionally by SDO/AIA and STEREO A/B spacecraft simultaneously for the first time. They show very good agreement so that the topological configurations of the magnetic fields can be analyzed, thus its role in the flare process of the active region can be better understood. A quantitative comparison with some stereoscopically reconstructed coronal loops shows that the present averaged misalignment angles are at the same order as the state-of-the-art results obtained with reconstructed coronal loops as prescribed conditions and better than other NLFFF methods. It is found that the o...
Wang, Rui; Tan, Baolin
An Application of the Immersed Boundary Method for Recovering the Three-Dimensional Wind Fields over Complex Terrain Using Multiple-Doppler Radar Data
This study develops an extension of a variational-based multiple-Doppler radar synthesis method to construct the three-dimensional wind field over complex topography. The immersed boundary method (IBM) is implemented to take into account the ...
Yu-Chieng Liou; Shao-Fan Chang; Juanzhen Sun
Plume Dispersion in the Convective Boundary Layer. Part II: Analyses of CONDORS Field Experiment Data
Extensive analyses are performed on data from the CONDORS (convective diffusion observed with remote sensors) field experiment, described in detail by Ebeerhard et al. Convective scaling is used to facilitate comparisons with laboratory and ...
G. A. Briggs
Spatially-Resolved Studies of Grain-Boundary Effects in Polycrystalline Solar Cells Using Micro-Photoluminescence and Near-Field Microscopy
Photoluminescence and photocurrent spectroscopies combined with diffraction-limited and sub- diffraction-limited spatial resolution are achieved via micro-photoluminescence (m-PL) and near-field microscopy (NSOM). These methods are used to examine the photo-response of individual grain boundaries in thin-film, polycrystalline solar cells at room and cryogenic temperatures. A systematic m-PL study of the effect of CdCl2-treatment on recombination in CdTe/CdS solar cell structures of varying thickness directly reveals the grain-boundary and surface passivation action of this important post-growth processing step. We achieve 50nm (l/10) spatial resolution in near-field Optical Beam Induced Current imaging (n-OBIC) of polycrystalline silicon solar cells using NSOM, at varying stages of silicon nitride grain-boundary passivation, and measure lateral variations in photo-response of CdTe/CdS solar cells with subwavelength spatial resolution.
Smith, S.; Dhere, R.; Gessert, T.; Stradins, P.; Mascarenhas, A.
Effects of solute and vacancy segregation on antiphase boundary migration in stoichiometric and Al-rich Fe?Al: a phase-field simulation study
Effects of segregation of solute atoms and vacancies on migration of antiphase boundaries (APBs) in stoichiometric (Fe-25 at%Al) and Al-rich (Fe-28 at%Al) Fe?Al at 673 K have been studied using a phase-field method in which ...
Koizumi, Yuichiro
Three-Dimensional Wind Field Analysis from Dual-Doppler Radar Data. Part III: The Boundary Condition: An Optimum Determination Based on a Variational Concept
The choice of the boundary condition when integrating the air mass continuity equation, is a major problem of the 3D wind field analysis from dual (or multiple) Doppler radar data. A zero vertical velocity at ground level seems the most natural ...
M. Chong; J. Testud
provision. #12;Industrial Engineering 29 I. Department efforts to retain students and graduation rates#12;12/23/2011 PROGRAM REVIEW OUTLINE Industrial Engineering I. Program Overview A one to two preparation of graduate students. I. Department efforts to retain students and graduation rates V. Department
Rock, Chris
pFLayer As IFeatureLayer, pOutSR As ISpatialReference) As IPolygon ' project the search geometry (well buffer polygon) into ' whatever the projection of the federal land...
Alaska NAD 83 Official Protraction Diagram (OPD) Outlines | Data...
NAD 83 Official Protraction Diagram (OPD) Outlines Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean ...
Alaska NAD 83 Official Protraction Diagram (OPD) Outlines (clipped...
Official Protraction Diagram (OPD) Outlines (clipped) Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean ...
Method and system for detecting polygon boundaries of structures in images as particle tracks through fields of corners and pixel gradients
A stochastic method and system for detecting polygon structures in images, by detecting a set of best matching corners of predetermined acuteness .alpha. of a polygon model from a set of similarity scores based on GDM features of corners, and tracking polygon boundaries as particle tracks using a sequential Monte Carlo approach. The tracking involves initializing polygon boundary tracking by selecting pairs of corners from the set of best matching corners to define a first side of a corresponding polygon boundary; tracking all intermediate sides of the polygon boundaries using a particle filter, and terminating polygon boundary tracking by determining the last side of the tracked polygon boundaries to close the polygon boundaries. The particle tracks are then blended to determine polygon matches, which may be made available, such as to a user, for ranking and inspection.
Paglieroni, David W. (Pleasanton, CA); Manay, Siddharth (Livermore, CA)
Study on Hydrodynamic Outline of an Unmanned Underwater Vehicle
Unmanned Underwater Vehicle (UUV) is being widely developed and used in many areas. In order to meet the low resistance and low noise requirements of a kind of UUV for long voyage, the outline curve and parameters of different sections of the UUV are ... Keywords: Unmanned underwater vehicle, Hydrodynamic outline, Low resistance, Low noise
Shao Zhiyu, Fang Jing, Feng Shunshan, Cheng Yufeng
President Obama to Outline Plan for America's Energy Security | Department
to Outline Plan for America's Energy Security to Outline Plan for America's Energy Security President Obama to Outline Plan for America's Energy Security March 30, 2011 - 12:00am Addthis Today at 11:20 AM ET, President Obama will deliver a speech at Georgetown University where he will outline his plan for America's energy security. The speech will be streamed live online at www.whitehouse.gov/live. The White House Fact Sheet on America's Energy Security is below. Also, on Friday, April 1, the President will visit a UPS shipping facility in Landover, MD where he will view vehicles from AT&T, FedEx, PepsiCo, UPS and Verizon's clean fleets and deliver remarks to the companies' employees. THE WHITE HOUSE Office of the Press Secretary FOR IMMEDIATE RELEASE March 30, 2011 FACT SHEET: America's Energy Security
Vice President Biden Outlines Funding for Smart Grid Initiatives |
Outlines Funding for Smart Grid Initiatives Outlines Funding for Smart Grid Initiatives Vice President Biden Outlines Funding for Smart Grid Initiatives April 16, 2009 - 12:00am Addthis Washington, DC - Vice President Joe Biden, on a visit to Jefferson City, Missouri, today with Commerce Secretary Gary Locke, detailed plans by the Department of Energy to develop a smart, strong and secure electrical grid, which will create new jobs and help deliver reliable power more effectively with less impact on the environment to customers across the nation. As part of the American Recovery and Reinvestment Act, the Vice President outlined plans to distribute more than $3.3 billion in smart grid technology development grants and an additional $615 million for smart grid storage, monitoring and technology viability.
President Obama to Outline Plan for America's Energy Security President Obama to Outline Plan for America's Energy Security President Obama to Outline Plan for America's Energy Security March 30, 2011 - 12:00am Addthis Today at 11:20 AM ET, President Obama will deliver a speech at Georgetown University where he will outline his plan for America's energy security. The speech will be streamed live online at www.whitehouse.gov/live. The White House Fact Sheet on America's Energy Security is below. Also, on Friday, April 1, the President will visit a UPS shipping facility in Landover, MD where he will view vehicles from AT&T, FedEx, PepsiCo, UPS and Verizon's clean fleets and deliver remarks to the companies' employees. THE WHITE HOUSE Office of the Press Secretary FOR IMMEDIATE RELEASE March 30, 2011 FACT SHEET: America's Energy Security
Fixed-outline thermal-aware 3D floorplanning
In this paper, we present a novel algorithm for 3D floorplanning with fixed outline constraints and a particular emphasis on thermal awareness. A computationally efficient thermal model that can be used to guide the thermal-aware floorplanning algorithm ...
Linfu Xiao; Subarna Sinha; Jingyu Xu; Evangeline F. Y. Young
DOE Outlines Research Needed to Improve Solar Energy Technologies |
Outlines Research Needed to Improve Solar Energy Technologies Outlines Research Needed to Improve Solar Energy Technologies DOE Outlines Research Needed to Improve Solar Energy Technologies August 12, 2005 - 2:39pm Addthis WASHINGTON, D.C. - To help achieve the Bush Administration's goal of increased use of solar and other renewable forms of energy, the Department of Energy's (DOE) Office of Science has released a report describing the basic research needed to produce "revolutionary progress in bringing solar energy to its full potential in the energy marketplace." The report resulted from a workshop of 200 scientists held earlier this year. "The tax credits contained in the historic energy bill signed by President Bush will greatly help expand the use of renewable energy," said Dr. Raymond L. Orbach, Director of DOE's Office of Science. "This research
Extraction of Typographic Elements from Outline Representations of Fonts
Digital typefaces for computer graphics and multimedia applications must be capable of supporting operations such as font variations, transformations, deformations and blending. A powerful implementation of such operations must rely on the inherent typographic attributes of the typeface. However, even today's most advanced typeface representations support only geometric outline representations and basic font variations. In this paper we discuss high-level typeface representations which we term Parametric Typographic Representations (PTRs). We present an algorithm for automatically extracting typographic elements of typefaces from their outline representation, which is an essential initial step in converting typefaces from outline representations to PTRs. The extracted typographic elements include serifs, bars, stems, slants, bows, arcs, curve stems and curve bars. Most notable is the treatment of serifs, which are represented by finite-automata. The algorithm only needs to learn a ser...
Ariel Shamir; Ari Rappoport
O'Leary outlines policy views at confirmation hearing
In her confirmation hearing, Secretary O'Leary outlined her views on various controversial issues. Among these were management of Yucca Mountain and the search for a nuclear waste repository, research on alternative fuels, encouragement of the use of renewable energy sources, and her views on intergrated resource planning.
Simpson, J.
UFO: unified convex optimization algorithms for fixed-outline floorplanning
In this paper, we apply two convex optimization methods, named UFO, for fixed-outline floorplanning. Our approach consists of two stages which are a global distribution stage and a local legalization stage. In the first stage, we first transform modules ...
Jai-Ming Lin; Hsi Hung
Unit Outline Policy Commencement Date: 25 February, 2011
Unit Outline Policy Commencement Date: 25 February, 2011 Category: Teaching and Learning Students 1. PURPOSE To ensure all students are provided with essential administrative information about a unit of study and to guide them in achieving the learning outcomes for the unit. 2. APPLICATION All Staff
Radiating Instability of a Meridional Boundary Current
A linear stability analysis of a meridional boundary current on the beta plane is presented. The boundary current is idealized as a constant-speed meridional jet adjacent to a semi-infinite motionless far field. The far-field region can be ...
Hristina G. Hristova; Joseph Pedlosky; Michael A. Spall
Inductive Proof Outlines for Exceptions in Multithreaded Java 1
boundaries. To mirror this modularity of the program behavior, the assertion logic and the proof system is covered by the interference freedom test [13,18], formulated also in the local language. It especially has, communication and object creation is covered by the cooperation test, using the global language. Communication
Steffen, Martin
Underground oil shale retorting. [Basic principles are outlined
The basic principles involved in combustion processing of oil shale are outlined. The manual is designed to serve as an introduction to the subject for the support personnel of the LLL Oil Shale Project. The material is presented in a simple two page format with one page devoted to a figure or table and the facing page contains a brief description of that material. Thus, it can serve as a self-study guide. Following a brief description of oil shale, how it was formed, and the extent of the resource, an overview of the concepts and major technical problems of Modified In-Situ (MIS) Oil Shale Retorting is presented. Finally, the liquid product, shale oil, is compared with typical petroleum crudes.
Campbell, J.H.; Raley, J.H.
The sector structure that organizes the magnetic field of the solar wind into large-scale domains has a clear pattern in the photospheric magnetic field as well. The rotation rate, 27-28.5 days, implies an effectively rigid rotation originating deeper in the solar interior than the sunspots. The photospheric magnetic field is known to be concentrated near that portion (the Hale boundary) in each solar hemisphere, where the change in magnetic sector polarity matches that between the leading and following sunspot polarities in active regions in the respective hemispheres. We report here that flares and microflares also concentrate at the Hale boundaries, implying that flux emergence and the creation of free magnetic energy in the corona also have a direct cause in the deep interior.
Svalgaard, L. [HEPL, Stanford University, Stanford, CA 94304 (United States); Hannah, I. G.; Hudson, H. S., E-mail: email@example.com [School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ (United Kingdom)
that the story of transportation policy can tell us what transportation, is, does, and might do in the future on transportation field in the U.S., today we'd like to interview you on a few topics on transportation in the West and professional background? Especially how did you get into the transportation field? I have long been interested
Levinson, David M.
Adiabatic Eastern Boundary Currents
The dynamics of the eastern boundary current of a high-resolution, idealized model of oceanic circulation are analyzed and interpreted in terms of residual mean theory. In this framework, it is clear that the eastern boundary current is adiabatic ...
Paola Cessi; Christopher L. Wolfe
The Mobility of Interfaces and Grain Boundaries from Molecular ...
Presentation Title, The Mobility of Interfaces and Grain Boundaries from Molecular ... A Hybrid Phase-Field / Transmission Electron Microscopy Approach for�...
South Dakota-Minnesota Boundary Waters Commission (South Dakota...
Field Sites Power Marketing Administration Other Agencies You are here Home Savings South Dakota-Minnesota Boundary Waters Commission (South Dakota) South Dakota-Minnesota...
Beyond Boundary Objects: Collaborative Reuse in Aircraft Technical Support
Boundary objects are a critical, but understudied, theoretical construct in CSCW. Through a field study of aircraft technical support, we examined the role of boundary objects in the practical achievement of safety by service engineers. Their resolution ... Keywords: boundary objects, collaborative work, high reliability organizations, hotlines, information reuse, organizational memory, safety, service engineering, technical support
Supergravity at the boundary of AdS supergravity
We give a general analysis of AdS boundary conditions for spin-3/2 Rarita-Schwinger fields and investigate boundary conditions preserving supersymmetry for a graviton multiplet in AdS{sub 4}. Linear Rarita-Schwinger fields in AdS{sub d} are shown to admit mixed Dirichlet-Neumann boundary conditions when their mass is in the range 0{dictionary, Neumann boundary conditions in d=4 supergravity correspond to gauging the superconformal group of the three-dimensional CFT describing M2-branes, while N=1 supersymmetric mixed boundary conditions couple the CFT to N=1 superconformal topologically massive gravity.
Amsel, Aaron J.; Compere, Geoffrey [Department of Physics, University of California, Santa Barbara, California 93106 (United States)
Membranes with a boundary
We investigate the recently developed theory of multiple membranes. In particular, we consider open membranes, i.e. the theory defined on a membrane world volume with a boundary. We first restrict our attention to the gauge sector of the theory. We obtain a boundary action from the Chern-Simons terms. Secondly, we consider the addition of certain boundary terms to various Chern-Simons theories coupled to matter. These terms ensure the full bulk plus boundary action has the correct amount of supersymmetry. For the ABJM model, this construction motivates the inclusion of a boundary quartic scalar potential. The boundary dynamics obtained from our modified theory produce Basu-Harvey type equations describing membranes ending on a fivebrane. The ultimate goal of this work is to throw light on the theory of fivebranes using the theory of open membranes.
David S Berman; Daniel C Thompson
Grain Boundaries and Interfaces
Oct 8, 2012 ... Applying this algorithm to symmetric tilt grain boundaries offers direct links ... recognized role as an influential component of microstructure.
Boundary conditions for metric fluctuations in Lifshitz
We consider the quantisation of linearised fluctuations of the metric and matter fields about a Lifshitz background, exploring the possibility of alternative boundary conditions, allowing the slow fall-off modes to fluctuate. We find that for $z >2$, slow fall-off modes for some of the linearised fluctuations are normalizable, which opens up the possibility of considering alternative boundary conditions. Analysing stability, we find that alternative boundary conditions for the momentum density are allowed, but alternative boundary conditions for the energy density lead to an instability of the type we recently discovered in a similar analysis for scalar fields on a fixed Lifshitz background. Our investigation is in the context of the simple massive vector model, but we would expect the conclusions to be more general.
Andrade, Tomas
Shape from the Light Field Boundary
Ray-based representations of shape have received little attention in computer vision. In this paper we show that the problem of recovering shape from silhouettes becomes considerably simplified if it is formulated as a reconstruction problem in the space ... Keywords: ray-based representations, 3D surface reconstruction, shape from silhouettes, shape from occluding contour
Kiriakos N. Kutulakos
Realization of the D'B' boundary condition
In this paper we find a realization for the D'B'-boundary conditions, which imposes vanishing normal derivatives of the normal components of the D and B fields. The implementation of the DB boundary, requiring vanishing normal components of D and B, is known. It is shown that the realization of the D'B' boundary can be based on a layer of suitable metamaterial, called the wave-guiding quarter-wave transformer, which transforms the DB boundary to the D'B' boundary. In an appendix, the mixed-impedance boundary, which is a generalization of both DB and D'B' boundaries, is shown to transform to another mixed-impedance boundary through the same transformer.
I. V. Lindell; A. Sihvola; L. bergamin; A. Favaro
ARM - Measurement - Planetary boundary layer height
govMeasurementsPlanetary boundary layer height govMeasurementsPlanetary boundary layer height 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 : Planetary boundary layer height Top of the planetary boundary layer; also known as depth or height of the mixing layer. 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 VCEIL : Vaisala Ceilometer External Instruments NCEPGFS : National Centers for Environment Prediction Global Forecast System Field Campaign Instruments
SLE boundary visits
We study the probabilities with which chordal Schramm-Loewner Evolutions (SLE) visit small neighborhoods of boundary points. We find explicit formulas for general chordal SLE boundary visiting probability amplitudes, also known as SLE boundary zig-zags or order refined SLE multi-point Green's functions on the boundary. Remarkably, an exact answer can be found to this important SLE question for an arbitrarily large number of marked points. The main technique employed is a spin chain - Coulomb gas correspondence between tensor product representations of a quantum group and functions given by Dotsenko-Fateev type integrals. We show how to express these integral formulas in terms of regularized real integrals, and we discuss their numerical evaluation. The results are universal in the sense that apart from an overall multiplicative constant the same formula gives the amplitude for many different formulations of the SLE boundary visit problem. The formula also applies to renormalized boundary visit probabilities for interfaces in critical lattice models of statistical mechanics: we compare the results with numerical simulations of percolation, loop-erased random walk, and Fortuin-Kasteleyn random cluster models at Q=2 and Q=3, and find good agreement.
Niko Jokela; Matti J�rvinen; Kalle Kyt�l�
DOE/E A - 1884 Yuma County, Colorado U. S. Department of Energy Western Area Power Administration December 2012 Wray Wind Energy Project Environmental Assessment For DOE/E A - 1884 Yuma County, Colorado U. S. Department of Energy Western Area Power Administration December 2012 THIS P AGE INTENTIONALLY BLAN K Table of Contents Table of Contents i W ray W ind Energy Project EA TABLE OF CONTENTS 1.0 INTRODUCTION ............................................................................................................ 1 -1 1.1 BACKG RO UND .................................................................................................................................1.1-1 1.2 PURPOS E AND NEED ........................................................................................................................1.2-1
... several points within the sewer system, at the wastewater treatment facility, or ... the NIST Boulder Laboratories by the Department of Energy Office of ...
AC/AB Stacking Boundaries in Bilayer Graphene
Boundaries, including phase boundaries, grain boundaries, and domain boundaries, are known to have an important influence on material properties. Here, dark-field (DF) transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM) imaging are combined to provide a full view of boundaries between AB and AC stacking domains in bilayer graphene across length scales from discrete atoms to the macroscopic continuum. Combining the images with results obtained by density functional theory (DFT) and classical molecular dynamics calculations, we demonstrate that the AB/AC stacking boundaries in bilayer graphene are nanometer-wide strained channels, mostly in the form of ripples, producing smooth low-energy transitions between the two different stackings. Our results provide a new understanding of the novel stacking boundaries in bilayer graphene, which may be applied to other layered two-dimensional materials as well.
Lin, Junhao [ORNL; Fang, Wenjing [Massachusetts Institute of Technology (MIT); Zhou, Wu [ORNL; Lupini, Andrew R [ORNL; Idrobo Tapia, Juan C [ORNL; Kong, Jing [Massachusetts Institute of Technology (MIT); Pennycook, Stephen J [ORNL; Pantelides, Sokrates T [ORNL
Spectral Scaling in a Tidal Boundary Layer
The simple scaling of a tidal bottom boundary layer by the shear velocity, u*, and the wall to the wall describes well the mean Bow field. To test the full extent of this scaling measurements were made of the turbulence spectra in a natural tidal ...
Thomas F. Gross; Arthur R. M. Nowell
Presentation to the EAC - Smart Grid Customer Acceptance Paper Outline - Wanda Reder
Customer Acceptance Customer Acceptance Paper Outline Electricity Advisory Committee October 16,2012 ∗ Wanda Reder ∗ Susan Kelly ∗ Bob Curry ∗ Phyllis Reha ∗ Elliot Roseman ∗ Paula Klein Thanks To ∗ In Smart Grid Committee, Conclusion That Issues & Challenges Associated With Consumer Acceptance Required More Detailed Discussion ∗ Reaching This Conclusion Close To October EAC Meeting Resulted In A Detailed Outline Of A Paper Being Achievable Why Separate Paper On Consumer Acceptance & Why An Outline? ∗ Brief Discussion Of Detailed Outline & Draft Recommendations To Guide Developing A Full Paper For EAC Review ∗ Comments Can Be Submitted Over The Next Two Weeks ∗ Develop An Approach & Schedule To Develop Full Paper For EAC Review
AER 1316H: Introduction and Course Outline Professor D.W. Zingg
AER 1316H: Introduction and Course Outline Professor D.W. Zingg (416-667-7709, dwz, by H. Lomax, T.H. Pulliam, and D.W. Zingg, Springer-Verlag, 2001. (Available at the U. of T. textbook
Zingg, David W.
MECH 410N Outline-2010.doc MECH 410N -Internal Combustion Engines
MECH 410N Outline-2010.doc 01/09/2010 MECH 410N - Internal Combustion Engines COURSE OUTLINE 1-IGNITION ENGINES 2.1. Air-Standard & Fuel-Air Cycle analysis 2.2. Performance Criteria 2.3. SI Engine Combustion 3.2. The Limited Pressure Cycle 3.3. The fuel-air cycle with complete combustion 3.4. Turbocharged
Observed Boundary Layer Wind Structure and Balance in the Hurricane Core. Part I: Hurricane Georges
The GPS dropsonde allows observations at unprecedentedly high horizontal and vertical resolution, and of very high accuracy, within the tropical cyclone boundary layer. These data are used to document the boundary layer wind field of the core of ...
Jeffrey D. Kepert
Modeling the Effects of the Spatially Varying Sea Surface Temperature on the Marine Atmospheric Boundary Layer
A two-dimensional marine planetary boundary layer model is developed and applied to simulate the evolution of coupled dynamic, thermodynamic and cloud properties of the marine boundary layer over a zonally varying sea surface temperature field. ...
Mickey Man-Kui Wai
Observed Diurnal Cycle Climatology of Planetary Boundary Layer Height
An observational climatology of the planetary boundary layer height (PBLH) diurnal cycle, specific to surface characteristics, is derived from 58 286 fine-resolution soundings collected in 14 major field campaigns around the world. An objective ...
Shuyan Liu; Xin-Zhong Liang
Boundary Layer Characteristics over Areas of Inhomogeneous Surface Fluxes
This paper describes results from a June 1992 field program to study the response of the boundary layer over a site with well-defined extreme differences in sensible and latent heat fluxes over clearly separated areas, each with characteristic ...
J. C. Doran; W. J. Shaw; J. M. Hubbe
Marine Boundary Layer Cloud Observations in the Azores
The recent deployment of the Atmospheric Radiation Measurement Program (ARM) Mobile Facility at Graciosa Island, Azores, in the context of the Clouds, Aerosol and Precipitation in the Marine Boundary Layer (CAP-MBL) field campaign added the most ...
Jasmine R�millard; Pavlos Kollias; Edward Luke; Robert Wood
Daytime Evolution of Relative Humidity at the Boundary Layer Top
Data from the Hydrological and Atmospheric Pilot Experiment-Mod�lisation du Bilan Hydrigue (HAPEX-MOBILHY) field program and results from a one-dimensional model of the soil and atmospheric boundary layer are analyzed to study the daytime ...
M. Ek; L. Mahrt
Surface Boundary Conditions for Mesoscale Regional Climate Models
This paper utilizes the best available quality data from multiple sources to develop consistent surface boundary conditions (SBCs) for mesoscale regional climate model (RCM) applications. The primary SBCs include 1) fields of soil characteristic (...
Xin-Zhong Liang; Hyun I. Choi; Kenneth E. Kunkel; Yongjiu Dai; Everette Joseph; Julian X. L. Wang; Praveen Kumar
Stratigraphic Boundaries | Open Energy Information
Open Energy Info (EERE)
Stratigraphic Boundaries Stratigraphic Boundaries Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Print PDF Stratigraphic Boundaries Dictionary.png Stratigraphic Boundaries: No definition has been provided for this term. Add a Definition Controlling Structures List of controlling structures typically associated with geothermal systems: Major Normal Fault Termination of a Major Normal Fault Stepover or Relay Ramp in Normal Fault Zones Apex or Salient of Normal Fault Fault Intersection Accommodation Zone Displacement Transfer Zone Pull-Apart in Strike-Slip Fault Zone Intrusion Margins and Associated Fractures Stratigraphic Boundaries Fissure Swarms Caldera Rim Margins Lithologically Controlled Hydrothermal circulation may occur at the contacts between different lithologies. Examples
Deformation and Transitions at Grain Boundaries
Formation of cell-wall structure during deformation � Intragranular boundaries: GNBs, IDBs, cell-block boundaries, etc. ... Hot Spots and Grain Boundaries.
AER 1318H: Introduction and Course Outline 2012 Professor D.W. Zingg
AER 1318H: Introduction and Course Outline 2012 Professor D.W. Zingg (416-667-7709, dwz.H. Pulliam and D.W. Zingg (will be dis- tributed in pdf form). Schedule and Mark Breakdown 1. Jan. 18 Lecture
County of Los Angeles This page outlines solar PV incentives, financing mechanisms, permitting process, and
/csi-latest-news/2167-why-pay-to-install-solar o Southern California Edison Solar Rooftop Program · This commercial energy grid. www.sce.com/solarleadership/solar-rooftop-program/ Property Assessed Clean Energy (PACECounty of Los Angeles This page outlines solar PV incentives, financing mechanisms, permitting
City of Long Beach This page outlines solar PV incentives, financing mechanisms, permitting process, and
/csi-latest-news/2167-why-pay-to-install-solar o Southern California Edison Solar Rooftop Program · This commercial energy grid. www.sce.com/solarleadership/solar-rooftop-program/ Property Assessed Clean Energy (PACECity of Long Beach This page outlines solar PV incentives, financing mechanisms, permitting process
City of Santa Ana This page outlines solar PV incentives, financing mechanisms, permitting process, and
/csi-latest-news/2167-why-pay-to-install-solar o Southern California Edison Solar Rooftop Program · This commercial energy grid. www.sce.com/solarleadership/solar-rooftop-program/ Secured Financing Secured financingCity of Santa Ana This page outlines solar PV incentives, financing mechanisms, permitting process
City of Palmdale This page outlines solar PV incentives, financing mechanisms, permitting process, and
/csi-latest-news/2167-why-pay-to-install-solar o Southern California Edison Solar Rooftop Program · This commercial energy grid. www.sce.com/solarleadership/solar-rooftop-program/ Property Assessed Clean Energy (PACECity of Palmdale This page outlines solar PV incentives, financing mechanisms, permitting process
City of Palm Desert This page outlines solar PV incentives, financing mechanisms, permitting process, and
/csi-latest-news/2167-why-pay-to-install-solar o Southern California Edison Solar Rooftop Program · This commercial energy grid. www.sce.com/solarleadership/solar-rooftop-program/ Property Assessed Clean Energy (PACECity of Palm Desert This page outlines solar PV incentives, financing mechanisms, permitting
City of Santa Monica This page outlines solar PV incentives, financing mechanisms, permitting process, and interconnection
-initiative/csi-latest- news/2167-why-pay-to-install-solar o Southern California Edison Solar Rooftop Program · This commercial energy grid. www.sce.com/solarleadership/solar-rooftop-program/ Property Assessed Clean Energy (PACECity of Santa Monica This page outlines solar PV incentives, financing mechanisms, permitting
Outline The Ensemble Kalman Filter Parameter estimation Test example Conclusion History matching via
Outline The Ensemble Kalman Filter Parameter estimation Test example Conclusion History matching estimation Test example Conclusion Test case setup · For the test case we use CERE's own in-house Black Oil estimation Test example Conclusion Test case setup · For the test case we use CERE's own in-house Black Oil
Mosegaard, Klaus
Chemical Hygiene Plan The purpose of the Chemical Hygiene Plan (CHP) is to outline laboratory work
Chemical Hygiene Plan I. Policy The purpose of the Chemical Hygiene Plan (CHP) is to outline community are protected from health hazards associated with chemicals with which they work. II. Authority The Chemical Hygiene Plan, required to comply with provisions of CCR Title 8 §5191 et al: A. Standard Operating
de Lijser, Peter
City of Chula Vista This page outlines solar PV incentives, financing mechanisms, permitting process, and
- Thursday 8:00AM - 5:00PM · Federal Solar Incentives o Residential Renewable Energy Tax Credit · A taxpayer_Code=U S02F&re=1&ee=1 · Property Assessed Clean Energy (PACE) Programs o CaliforniaFIRST - The CityCity of Chula Vista This page outlines solar PV incentives, financing mechanisms, permitting
City of San Diego This page outlines solar PV incentives, financing mechanisms, permitting process, and
to actual energy use and is responsible for system performance, operations and maintenance. #12; www.energycenter.org/index.php/incentive-programs/california-solar- initiative/csi-latest-news/2167-why-pay-to-install-solar · Property Assessed Clean Energy (PACE) Programs oCity of San Diego This page outlines solar PV incentives, financing mechanisms, permitting process
Explaining culture: an outline of a theory of socio-technical interactions
This paper presents four criticisms of positivistic research in cross-cultural human-computer interactions. An outline of a theory of cultural influences in socio-technical systems is then presented. Based on the ecological approach to perception and ... Keywords: comparative informatics, computer supported intercultural collaboration (csic), culture, perception and appropriation of affordances, socio-technical interactions, structures and functions of technological intersubjectivity
Ravi K. Vatrapu
Shear Response of an Al S5 Asymmetrical Tilt Grain Boundary ...
... grain boundaries is obviously smaller than that of the symmetrical ones. ... Phase Field Crystal Modeling of Microstructure in Multi-component Alloys.
Plasma waves reflection from a boundary with specular accommodative boundary conditions
In the present work the linearized problem of plasma wave reflection from a boundary of a half--space is solved analytically. Specular accommodative conditions of plasma wave reflection from plasma boundary are taken into consideration. Wave reflectance is found as function of the given parameters of the problem, and its dependence on the normal electron momentum accommodation coefficient is shown by the authors. The case of resonance when the frequency of self-consistent electric field oscillations is close to the proper (Langmuir) plasma oscillations frequency, namely, the case of long wave limit is analyzed. Refs. 17. Figs. 6.
N. V. Gritsienko; A. V. Latyshev; A. A. Yushkanov
New report from White House outlines largest problems facing United States
New report from White House outlines largest problems facing United States New report from White House outlines largest problems facing United States energy grid Home > Blogs > Graham7781's blog Graham7781's picture Submitted by Graham7781(2002) Super contributor 16 August, 2013 - 12:21 energy grid OpenEI President Smart Grid United States White House On Monday, the White House released a new report that identifies the one of the biggest problems facing today's power grid. As prepared by the President's Council of Economic Advisers, the U.S. Department of Energy's Office of Electricity Delivery and Energy Reliability and the White House Office of Science and Technology, the report, entitled "Economic Benefits of Increasing Electric Grid Resilience to Weather Outages," states that the grid is extremely vulnerable to power outages due
Automatic Verification of String Manipulating ProgramsOverview Outline Overview Symbolic String Verification Composite Verification References
Is it Vulnerable? We investigate string verification problem and present an automata-based approach for automatic verification of string manipulating programs based on symbolic string analysis. String analysis plays an important role in the security area. For instance, one can detect various web vulnerabilities like SQL Command Injection and Cross Site Scripting (XSS) attacks. Fang Yu, UCSB Automatic Verification of String Manipulating ProgramsOutline
Fang Yu; Cs Guest Leture
Far field acceleration
Far fields are propagating electromagnetic waves far from their source, boundary surfaces, and free charges. The general principles governing the acceleration of charged particles by far fields are reviewed. A survey of proposed field configurations is given. The two most important schemes, Inverse Cerenkov acceleration and Inverse free electron laser acceleration, are discussed in detail.
Fernow, R.C.
Parameterization of Joint Frequency Distributions of Potential Temperature and Water Vapor Mixing Ratio in the Daytime Convective Boundary Layer
Joint frequency distributions (JFDs) of potential temperature (?) versus water vapor mixing ratio (r) within the convective boundary layer were measured during a new field experiment named Boundary Layer Experiment 1996 (BLX96). These JFDs were ...
Larry K. Berg; Roland B. Stull
Boundary effects of electromagnetic vacuum fluctuations on charged particles
The effects of electromagnetic vacuum fluctuations with the boundary on charged particles is investigated. They may be observed via an electron interference experiment near the conducting plate, where boundary effects of vacuum fluctuations are found significant on coherence reduction of the electrons. The dynamics of the charge under the influence of quantized electromagnetic fields with a conducting plate is also studied. The corresponding stochastic equation of motion is derived in the semiclassical approximation, and the behavior of the charge's velocity fluctuations is discussed.
Tai-Hung Wu; Jen-Tsung Hsiang; Da-Shin Lee
Wu, Tai-Hung; Lee, Da-Shin
Boundary stabilization of transmission problems
We study the transmission problem in bounded domains with dissipative boundary conditions. Under some natural assumptions, we prove uniform bounds of the corresponding resolvents on the real axis at high frequency, and as a consequence, we obtain free of eigenvalues regions. As an application, we get exponential decay of the energy of the solutions of the correpsonding mixed boundary value problems.
Fernando Cardoso; Georgi Vodev
Parameterizing Grid-Averaged Longwave Fluxes for Inhomogeneous Marine Boundary Layer Clouds
This paper examines the relative impacts on grid-averaged longwave flux transmittance (emittance) for marine boundary layer (MBL) cloud fields arising from horizontal variability of optical depth ? and cloud sides. First, using fields of Landsat-...
Howard W. Barker; Bruce A. Wielicki
Epitaxial Stabilization of a Morphotropic Phase Boundary in Lead-Free Ferroelectric Thin Films
energy barrier for phase transformation in these films. The piezoelectric andpiezoelectric charge coefficient direct current density functional theory dysprosium scandate electric field coercive field energyenergy surface� near a structural phase boundary is the origin of the enhanced piezoelectric
Zeches, Robert James
An Evaluation of Boundary Conditions for Modeling Urban Boundary Layers
Numerical modeling of the urban boundary layer is complicated by the need to describe airflow patterns outside of the computational domain. These patterns have an impact on how successfully the simulation is able to model the turbulence associated with the urban boundary layer. This talk presents experiments with the model boundary conditions for simulations that were done to support two Department of Energy observational programs involving the Salt Lake City basin. The Chemical/Biological Non-proliferation Program (CBNP) is concerned with the effects of buildings on influencing dispersion patterns in urban environments. The Vertical Transport and Mixing Program (VTMX) investigating mixing mechanisms in the stable boundary layer and how they are influenced by the channeling caused by drainage flows or by obstacles such as building complexes. Both of these programs are investigating the turbulent mixing caused by building complexes and other urban obstacles.
Calhoun, R.J.; Chan, S.T.; Lee, R.L.
Model curriculum outline for Alternatively Fueled Vehicle (AFV) automotive technician training in light and medium duty CNG and LPG
This model curriculum outline was developed using a turbo-DACUM (Developing a Curriculum) process which utilizes practicing experts to undertake a comprehensive job and task analysis. The job and task analysis serves to establish current baseline data accurately and to improve both the process and the product of the job through constant and continuous improvement of training. The DACUM process is based on the following assumptions: (1) Expert workers are the best source for task analysis. (2) Any occupation can be described effectively in terms of tasks. (3) All tasks imply knowledge, skills, and attitudes/values. A DACUM panel, comprised of six experienced and knowledgeable technicians who are presently working in the field, was given an orientation to the DACUM process. The panel then identified, verified, and sequenced all the necessary job duty areas and tasks. The broad duty categories were rated according to relative importance and assigned percentage ratings in priority order. The panel then rated every task for each of the duties on a scale of 1 to 3. A rating of 3 indicates an {open_quotes}essential{close_quotes} task, a rating of 2 indicates an {open_quotes}important{close_quotes} task, and a rating of 1 indicates a {open_quotes}desirable{close_quotes} task.
The Method of Boundary Perturbation,
Method of Boundary Perturbation, Method of Boundary Perturbation, and Its Application to Wakefield Calculationst Weiren Chou+ Advanced Photon Source Argonne National Laboratory 9700 S. Cass Ave. Argonne, IL 60439 USA Spring Meeting of The American Physical Society Division of Physics of Beams Washington, D.C. April 16-19, 1990 tWork supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Contract W-31-109-ENG-38. tPresent address: SSC Laboratory, Accelerator Division, MS-I046, 2550 Beckleymeade Ave., Dallas, TX 75237, USA. LS-/~ Boundary Perturbation, and Its Application to Wakefield Calculations ABSTRACT The boundary perturbation method, suggested by Zhang and, independently, by Chatard-Moulin, Cooper, and their colleagues, is employed to the wakefield cal-
Modeling the Benthic Boundary Layer
A second-order turbulence closure model is used to study the development of the benthic boundary layer. Results are presented on the effects of a time-dependent oscillatory forcing flow and an initially stably stratified density gradient. Using ...
K. J. Richards
The Import Threat : Detroit's Boundary Objects During the 1980s
ler who sold the car to the consumer, the bank that provided financing to the consumer, the marketing agency that created the advertisements that enticed the consumer to buy the car, the group of individuals who assembled the car, the corporation that hired and trained those individuals, the corporation that provided the tyres, the corporation that provided the rubber for the tyres,... and finally, the government that established the trade policies that made the creation of that car possible and profitable. Coordinating activity and information amongst these various actors is not an easy task. They each have different motivations and goal and lack a common perspective or language. Inter-organizational communication requires a special animal: the Boundary Object. Boundary Objects Star and Griesemer (1989) introduced the Boundary Object to the field of Science Studies. Although they were studying how scientists collected samples for a museum nearly a century ago, Boundary Objects have b
George Goodall
Grain-boundaries and Triple Junctions
Mar 14, 2012 ... For each tilt angle, the perfect boundary is created, as well as one containing a ... The stimulation of migration of general boundary by GBS is�...
Investigating Grain Boundary Structure-Kinetic Property ...
Abstract Scope, Grain boundary energy landscapes contain all the information that is required to describe the kinetic behavior of grain boundaries (GBs).
Grain boundary segregation of carbon in iron
Excess carbon was present near grain boundaries in specimens equilibrated at ... the amount of carbon near the grain boundaries was found to decrease as the
Field observations and lessons learned
This presentation outlines observations and lessons learned from the Megaports program. It provides: (1) details of field and technical observations collected during LANL field activities at ports around the world and details of observations collected during radiation detections system testing at Los Alamos National Laboratory; (2) provides suggestions for improvement and efficiency; and (3) discusses possible program execution changes for more effective operations.
Nielsen, Joh B [Los Alamos National Laboratory
Wind on the boundary for the Abelian sandpile model
We continue our investigation of the two-dimensional Abelian sandpile model in terms of a logarithmic conformal field theory with central charge c=-2, by introducing two new boundary conditions. These have two unusual features: they carry an intrinsic orientation, and, more strangely, they cannot be imposed uniformly on a whole boundary (like the edge of a cylinder). They lead to seven new boundary condition changing fields, some of them being in highest weight representations (weights -1/8, 0 and 3/8), some others belonging to indecomposable representations with rank 2 Jordan cells (lowest weights 0 and 1). Their fusion algebra appears to be in full agreement with the fusion rules conjectured by Gaberdiel and Kausch.
Philippe Ruelle
Boundary Layer Parameterization for a Non-Gaussian Puff Model
The paper presents two boundary layer parameterizations for a model based on a general technique for solving the K equation using the truncated Gram�Charlier expansion (type A) of the concentration field and a finite set of equations for the ...
T. Tirabassi; U. Rizza
Von K�rm�n's Constant in Atmospheric Boundary Layer Flow: Reevaluated
A field experiment has been carried out with the specific objective in mind to determine the value of von K�rm�n's constant in atmospheric boundary layer flow, and also to investigate its possible dependence on the surface Rossby number Ro0. Data ...
Ulf H�gstr�m
Modeling open boundaries in dissipative MHD simulation
The truncation of large physical domains to concentrate computational resources is necessary or desirable in simulating many natural and man-made plasma phenomena. Three open boundary condition (BC) methods for such domain truncation of dissipative magnetohydrodynamics ... Keywords: Approximate Riemann, Artificial boundary, Calderon method, Dissipative, Lacuna, Lacunae, MHD, Magnetohydrodynamics, Non-reflecting boundary, Nonlinear, Open boundary, hyperbolic-parabolic
E. T. Meier; A. H. Glasser; V. S. Lukin; U. Shumlak
Metric deformation and boundary value problems in 3D
A novel perturbative method, proposed by Panda {\\it et al.} [1] to solve the Helmholtz equation in two dimensions, is extended to three dimensions for general boundary surfaces. Although a few numerical works are available in the literature for specific domains in three dimensions such a general analytical prescription is presented for the first time. An appropriate transformation is used to get rid of the asymmetries in the domain boundary by mapping the boundary into an equivalent sphere with a deformed interior metric. The deformed metric produces new source terms in the original homogeneous equation. A deformation parameter measuring the deviation of the boundary from a spherical one is introduced as a perturbative parameter. With the help of standard Rayleigh-Schr{\\"o}dinger perturbative technique the transformed equation is solved and the general solution is written down in a closed form at each order of perturbation. The solutions are boundary condition free and which make them widely applicable for various situations. Once the boundary conditions are applied to these general solutions the eigenvalues and the wavefunctions are obtained order by order. The efficacy of the method has been tested by comparing the analytic values against the numerical ones for three dimensional enclosures of various shapes. The method seems to work quite well for these shapes for both, Dirichlet as well as Neumann boundary conditions. The usage of spherical harmonics to express the asymmetries in the boundary surfaces helps us to consider a wide class of domains in three dimensions and also their fast convergence guarantees the convergence of the perturbative series for the energy. Direct applications of this method can be found in the field of quantum dots, nuclear physics, acoustical and electromagnetic cavities.
Subhasis Panda; S. Pratik Khastgir
Quantum Field Theory and Representation Theory
Quantum Field Theory and Representation Theory Peter Woit firstname.lastname@example.com Department of Mathematics Columbia University Quantum Field Theory and Representation Theory p.1 #12;Outline of the talk · Quantum Mechanics and Representation Theory: Some History Quantum Field Theory and Representation Theory
Woit, Peter
An Investigation of the Boundary Layer Dynamics of Sardinia Island under Sea-Breeze Conditions
A numerical mesoscale model is used to study the wind field and the boundary layer structure of the island of Sardinia during typical summer conditions. The numerical model is three-dimensional and employs a higher-order turbulence closure ...
Dimitrios Melas; Alfredo Lavagnini; Anna-Maria Sempreviva
Wind Direction Dependence of Atmospheric Boundary Layer Turbulence Parameters in the Urban Roughness Sublayer
A variety of atmospheric boundary layer parameters are examined as a function of wind direction in both urban and suburban settings in Oklahoma City, Oklahoma, derived from measurements during the Joint Urban 2003 field campaign. Heterogeneous ...
Cheryl Klipp
An Investigation of the Development of Cumulonimbus Systems over South Florida. Part I: Boundary Layer Interactions
This paper investigates the interactions between two developing cumulonimbus systems and the boundary layer (surface winds, pressure, divergence and temperature fields) on a case study day, 25 August 1975. These two systems formed within 45 min ...
John B. Cunning; Mark Demaria
Sensitivity of MM5-Simulated Boundary Layer Characteristics to Turbulence Parameterizations
The sensitivity of high-resolution mesoscale simulations to boundary layer turbulence parameterizations is investigated using the fifth-generation Pennsylvania State University�NCAR Mesoscale Model (MM5) and observations from two field campaigns. ...
Larry K. Berg; Shiyuan Zhong
A Modeling Study of the Effects of Inhomogeneous Surface Fluxes on Boundary-Layer Properties
A numerical modeling study was conducted to examine the response of the atmospheric boundary layer to inhomogeneous surface fluxes. The study was used to extend the results obtained from a field experiment carried out in spring 1992 in north-...
Shiyuan Zhong; J. C. Doran
A Laboratory Study of the Zonal Structure of Western Boundary Currents
The zonal structure of strongly nonlinear inertial western boundary currents (WBCs) is studied experimentally along a straight �meridional� coast in a 5-m-diameter rotating basin by analyzing the �zonal� profile of the meridional velocity field ...
Stefano Pierini; Vincenzo Malvestuto; Giuseppe Siena; Thomas A. McClimans; Stig M. L�v�s
Numerical Simulations of a Stratocumulus-Capped Boundary Layer Observed over Land
Detailed observations of both mean and turbulence fields of an anticyclonic, quasi-steady state, stratocumulus-capped boundary layer obtained with ground-based and balloonborne equipment during the night of 19/20 November 1976 at Cardington, ...
Chih-Yue Jim Kao; Tetsuji Yamada
A PDF Dispersion Model for Buoyant Plumes in the Convective Boundary Layer
A probability density function (PDF) dispersion model is presented for buoyant plumes in the convective boundary layer (CBL), where the mean concentration field C is obtained from the PDFs py and pz of tracer particle position in the lateral y ...
J. C. Weil; L. A. Corio; R. P. Brower
Aspects of Convective Boundary Layer Turbulence Measured by a Dual-Doppler Lidar System
Special designed dual-Doppler setups can be used to retrieve simultaneous measurements of two wind components with high temporal resolution in several heights throughout the atmospheric boundary layer. During a field campaign in summer 2011, ...
Luisa R�hner; Katja Tr�umner
Retrieval of Urban Boundary Layer Structures from Doppler Lidar Data. Part II: Proper Orthogonal Decomposition
The proper orthogonal decomposition technique is applied to 74 snapshots of 3D wind and temperature fields to study turbulent coherent structures and their interplay in the urban boundary layer over Oklahoma City, Oklahoma. These snapshots of ...
Ching-Long Lin; Quanxin Xia; Ronald Calhoun
Effects of mesoscale surface inhomogeneities on atmospheric boundary layer transfer
Defining the nature of turbulent transfer over horizontally inhomogeneous surfaces remains one of the challenges in meteorology. Because the transfer of energy and momentum through the atmospheric boundary layer forms part of the lower boundary condition for global climate models (GCMs), the problem is important. Over the last two decades, advances in sensor and computer technology wave made good point measurements of turbulent fluxes fairly routine. A fundamental question with respect to climate models, however, is how such point measurements are related to average fluxes over the area of a GCM grid box. In this paper we will use data from the field program to depict the evolution of the boundary layer over adjacent, sharply contrasting surface types on two separate occasions. We will then use simple scaling based on the observations to argue that sub-gridscale motions would often be likely to significantly alter the estimates and resulting parameterizations of GCM-scale surface fluxes in the region.
Shaw, W.J.; Doran, J.C.; Hubbe, J.M.
Boundary determinations for trivariate solids
The trivariate tensor-product B-spline solid is a direct extension of the B-spline patch and has been shown to be useful in the creation and visualization of free-form geometric solids. Visualizing these solid objects requires the determination of the boundary surface of the solid, which is a combination of parametric and implicit surfaces. This paper presents a method that determines the implicit boundary surface by examination of the Jacobian determinant of the defining B-spline function. Using an approximation to this determinant, the domain space is adaptively subdivided until a mesh can be determined such that the boundary surface is close to linear in the cells of the mesh. A variation of the marching cubes algorithm is then used to draw the surface. Interval approximation techniques are used to approximate the Jacobian determinant and to approximate the Jacobian determinant gradient for use in the adaptive subdivision methods. This technique can be used to create free-form solid objects, useful in geometric modeling applications.
Duchaineau, M; Joy, K I
Nenad Antonic & Kresimir Burazin Boundary operator from matrix field formulation
@math.hr firstname.lastname@example.com This work is supported in part by the Croatian MZOS trough projects 037 systems, encompassing also a variety of elliptic and parabolic problems. Even more, he provided
Burazin, Kresimir
The gravity field and plate boundaries in Venezuela
Free-air and simple Bouguer anomaly maps of the Venezuelan continental margin (from 60�W to 72�W and from 7�N to 13�N) are presented. The major features of the free-air map are: the large lows associated with the deep ...
Folinsbee, Robert Allin
Monsoon Trough Boundary Layer Experiment (MONTBLEX)
The Monsoon Trough Boundary Layer Experiment (MONTBLEX) is a multi-institutional, all-India coordinated program to study the atmospheric boundary-layer processes in the monsoon trough (MT) area of northern India. The experiment is being organized ...
Malti Goel; H. N. Srivastava
Disturbances along the Arizona Monsoon Boundary
The possibility of disturbances along the boundary between two air masses in the southwestern United States and northwestern Mexico during the summer is examined. This boundary is an approximately north-south confluent zone resulting from the ...
Thomas J. Moore; Robert L. Gall; Thomas C. Adang
Large-Eddy Boundary Layer Entrainment
A series of large-eddy simulations have been performed to explore boundary layer entrainment under conditions of a strongly capped inversion layer with the boundary layer dynamics driven dominantly by buoyant forcing. Different conditions ...
D. C. Lewellen; W. S. Lewellen
Ocean Boundary Mixing during Ekman Layer Arrest
As a water parcel comes into contact with an ocean boundary, energy is dissipated within the boundary layer with some fraction directed into vertical mixing. In a stratified flow this increases the potential energy associated with the density ...
Scott A. Condie
The properties of mixed reality boundaries
Mixed reality boundaries establish transparent windows between physical and virtual spaces. We introduce a set of properties that allow such boundaries to be configured to support different styles of co-operative activity. These properties are grouped ...
Boriana Koleva; Steve Benford; Chris Greenhalgh
Beyond the no-slip boundary condition
This paper offers a simple macroscopic approach to the question of the slip boundary condition to be imposed upon the tangential component of the fluid velocity at a solid boundary. Plausible reasons are advanced for ...
Brenner, Howard
The GATE Boundary Layer Instrumentation System (BLIS)
A tethered sonde, the Boundary Layer Instrument System (BLIS), was designed for use from shipboard platforms in the GARP Atlantic Tropical Experiment (GATE). This system was able to monitor the thermal and kinematic properties of the boundary ...
Donald P. Wylie; Chester F. Ropelewski
SLE($?,?$)and Boundary Coulomb Gas
We consider the coulomb gas model on the upper half plane with different boundary conditions, namely Drichlet, Neuman and mixed. We related this model to SLE($\\kappa,\\rho$) theories. We derive a set of conditions connecting the total charge of the coulomb gas, the boundary charges, the parameters $\\kappa$ and $\\rho$. Also we study a free fermion theory in presence of a boundary and show with the same methods that it would lead to logarithmic boundary changing operators.
S. Moghimi-Araghi; M. A. Rajabpour; S. Rouhani
Positive solutions for a class of boundary-value problems with integral boundary conditions
This paper investigates the existence and multiplicity of positive solutions for a class of nonlinear boundary-value problems of fourth-order differential equations with integral boundary conditions. The arguments are based upon a specially constructed ... Keywords: Boundary-value problem, Existence, Fixed-point theorem, Integral boundary conditions, Positive solution
Xuemei Zhang; Weigao Ge
Final Report - Plasma Transport at the Magnetospheric Flank Boundary
Progress is highlighted in these areas: 1. Model of magnetic reconnection induced by three-dimensional Kelvin Helmholtz (KH) modes at the magnetospheric flank boundary. 2. Quantitative evaluation of mass transport from the magnetosheath onto closed geomagnetic field for northward IMF. 3. Comparison of mass transfer by cusp reconnection and Flank Kelvin Helmholtz modes. 4. Entropy constraint and plasma transport in the magnetotail - a new mechanism for current sheet thinning. 5. Test particle model for mass transport onto closed geomagnetic field for northward IMF . 6. Influence of density asymmetry and magnetic shear on (a) the linear and nonlinear growth of 3D Kelvin Helmholtz (KH) modes, and (b) three-dimensional KH mediated mass transport. 7. Examination of entropy and plasma transport in the magnetotail. 8. Entropy change and plasma transport by KH mediated reconnection - mixing and heating of plasma. 9. Entropy and plasma transport in the magnetotail - tail reconnection. 10. Wave coupling at the magnetospheric boundary and generation of kinetic Alfven waves.
Otto, Antonius
Carrier mobility measurement across a single grain boundary in polycrystalline silicon using an organic gate thin-film transistor
In this study, we developed a measurement method for field-effect-carrier mobility across a single grain boundary in polycrystalline Si (poly Si) used for solar cell production by using an organic gate field-effect transistor (FET). To prevent precipitation and the diffusion of impurities affecting the electronic characteristics of the grain boundary, all the processing temperatures during FET fabrication were held below 150 deg. C. From the grain boundary, the field-effect mobility was measured at around 21.4 cm{sup 2}/Vs at 297 K, and the temperature dependence of the field-effect mobility suggested the presence of a potential barrier of 0.22 eV at the boundary. The technique presented here is applicable for the monitoring of carrier conduction characteristics at the grain boundary in poly Si used for the production of solar cells.
Hashimoto, Masaki; Kanomata, Kensaku; Momiyama, Katsuaki; Kubota, Shigeru; Hirose, Fumihiko
A High-Resolution Ionic Anemometer for Boundary-Layer Measurements
A new high-resolution ionic anemometer was constructed using inexpensive electronics. Calibration and data procedures are outlined and preliminary results of field trials are given. The detection limit is better than 10?2 m s?1 and the frequency ...
J. Barat
Industry Practices for Field Switchmen Qualification
In 2011, the Electric Power Research Institute (EPRI) Switching Safety & Reliability Task Force launched a project to prepare a report on industry practices for the qualification of field switching personnel. This report summarizes the findings of this research, and outlines the necessary elements of "best practices" for the training and qualification of field switching personnel.
Crystallographic Boundary in a Magnetic Shape Memory Material
Crystallographic Boundary in a Crystallographic Boundary in a Magnetic Shape Memory Material Crystallographic Boundary in a Magnetic Shape Memory Material Print Wednesday, 18 April 2012 11:37 A research team has shown the existence of a special structural boundary in an intermetallic compound by combining the unique measurement facilities at the ALS, the single-crystal production capabilities of Tohoku University (Japan), and the materials science expertise of Johannes-Gutenberg-University (Germany). Conventional shape memory materials, such as the commercially available Nitinol (an alloy of nickel and titanium used in microsensing, actuation, and medical devices), undergo a phase transformation with cooling or heating when large areas of a sample distort along a single axis, and where the atomic-unit cell "stretching" from a cube to a rectangular prism occurs. In contrast, magnetic shape memory (MSM) materials are much more rare but have an advantage: The axis of magnetic anisotropy is coupled to the direction of stretching, so a perfect MSM crystal can be made to flex and bend reversibly by applying an external magnetic field.
Double-Trace Deformations, Mixed Boundary Conditions and Functional Determinants in AdS/CFT
According to the AdS/CFT dictionary, perturbing the large N boundary theory by a relevant double-trace deformation of the form f O^2 corresponds in the bulk to imposing ``mixed'' boundary conditions for the field dual to O. In this note we address various aspects of this correspondence. The change c_{UV} - c_{IR} of the central charge between the UV ad IR fixed points is known from explicit calculations (hep-th/0210093, hep-th/0212138) to be exactly the same in the bulk and in the boundary theories. By comparing the appropriate bulk and boundary functional determinants, we give a simple ``kinematic'' explanation for this universal agreement. We also clarify the prescription for computing AdS/CFT correlators with Delta_- boundary conditions.
Hartman, T; Hartman, Thomas; Rastelli, Leonardo
Thomas Hartman; Leonardo Rastelli
Grain Boundary and Intragranular Deformations during High ...
boundary sliding (GBS) was quantified by measuring microgrid offsets at grain .... microgrids are respectively 5 m and 0.5 m so as to obtain several grid line�...
Modernizing the International Boundary and Water Commission
challenges are present in the Colorado River basin and inalong the R�o Grande and Colorado rivers. While the 1944binational boundary along the Colorado and R�o Grande. The
Kelly, Mary E.; Sz�kely, Alberto
The Influence of Grain Boundary Type upon Damage Evolution at Grain Boundary Interfaces
In a prior work, it was found that grain boundary structure strongly influences damage evolution at grain boundaries in copper samples subjected to either shock compression or incipient spall. Here, several grain boundaries with different grain boundary structures, including a {Sigma}3 (10-1) boundary, are interrogated via conventional transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) to investigate the effects of atomic-scale structural differences on grain boundary strength and mobility. Boundaries are studied both before and after shock compression at a peak shock stress of 10 GPa. Results of the TEM and HRTEM work are used in conjunction with MD modeling to propose a model for shock-induced damage evolution at grain boundary interfaces that is dependent upon coincidence.
Perez-Bergquist, Alejandro G [Los Alamos National Laboratory; Brandl, Christian [Los Alamos National Laboratory; Escobedo, Juan P [Los Alamos National Laboratory; Trujillo, Carl P [Los Alamos National Laboratory; Cerreta, Ellen K [Los Alamos National Laboratory; Gray III, George T [Los Alamos National Laboratory; Germann, Timothy C [Los Alamos National Laboratory
Modeling biofilm processes using the immersed boundary method
Biofilm processes are of interest to researchers in a variety of fields including bioremediation, oil recovery, waste water treatment, medicine, and dentistry. In this paper we describe how this complex, dynamic, fluid-structure interaction can be modeled successfully using the immersed boundary method. The model presented here includes the coupling of hydrodynamics; substrate reaction, diffusion, and convection; as well as the chemotactic response of swimming microbes. Cell-cell aggregation and cell-substratum adhesion are modeled by generating appropriate binding forces between discrete representations of organisms that may hold them together, or if fluid stresses are large, may yield and release the organisms. In this paper, we show two-dimensional numerical simulations to demonstrate several different types of scenarios that may be modeled using immersed boundary methods. These simulations indicate the variety of different phenomena one might expect in biofilm processes. 24 refs., 8 figs., 2 tabs.
Dillon, R.; Fauci, L. [Tulane Univ., New Orleans, LA (United States); Fogelson, A. [Univ. of Utah, Salt Lake City, UT (United States)] [and others
Environmental boundaries to energy development
Public concern about the environment, health and safety consequences of energy technology has been growing steadily for more than two decades in the United States. This concern forms an important boundary condition as the United States seeks to develop a new National Energy Strategy. Furthermore, the international aspects of the energy/environment interface such as acid rain global climate change and stratospheric ozone depletion are very prominent in US thinking. In fact, the energy systems of the world are becoming more closely coupled environmentally and otherwise. Now where is this coupling more important than that between the industrialized and developing world; the choices made by each will have profound effects on the other. The development of energy technologies compatible with both economic growth and improving and sustaining environmental quality represents a major R D challenge to the US and USSR. Decision about adoption of new technology and R D priorities can be improved by better measurements of how energy sources and uses are changing throughout the world and better methods to project the potential consequences of these decisions. Such projection require understanding relative risks of alternating existing and evolving technologies. All of these R D areas, technology improvement energy system monitoring and projection and comparative risk assessment are the topics of this seminar. Progress in each may be enhanced by collaboration and cooperation between our two countries. 7 refs., 27 figs., 5 tabs.
Trivelpiece, A.W.
Imperfect Bose Gas with Attractive Boundary Conditions
The free Bose gas with attractive boundary conditions is an interesting toy model for the study of Bose-Einstein Condensation (BEC), because one has BEC already in one dimension. Here we study for the first time the imperfect Bose gas with these boundary conditions and prove rigorously the occurence of condensation.
Lieselot Vandevenne; Andre Verbeure
Simultaneous Boundary Partitioning and Cameras Synchronization for
the boundary B and the periodicity T. A static variation (WDTs) of the WDT criterion in equa- tion (3) is defined in Alberton et al. (2012). In particular, WDTs(X) := max p0,t0 {t - t0 : p0 X(t), t t0}, (5 is an (open) boundary, a (periodic) cameras trajectory with minimum WDTs can be computed by optimally
Bullo, Francesco
Turbulence Structure of the Convective Boundary Layer. Part III: The Vertical Velocity Budgets of Thermals and Their Environment
The dynamics of thermal updrafts and compensating environmental downdrafts in the convective boundary layer are examined using observations from the Phoenix 78 field experiment. Separate vertical velocity budgets are presented for thermal ...
George S. Young
Air�Sea Exchange in Hurricanes: Synthesis of Observations from the Coupled Boundary Layer Air�Sea Transfer Experiment
The Coupled Boundary Layer Air�Sea Transfer (CBLAST) field program, conducted from 2002 to 2004, has provided a wealth of new air�sea interaction observations in hurricanes. The wind speed range for which turbulent momentum and moisture exchange ...
Peter G. Black; Eric A. D'Asaro; Thomas B. Sanford; William M. Drennan; Jun A. Zhang; Jeffrey R. French; Pearn P. Niiler; Eric J. Terrill; Edward J. Walsh
Modeling the Atmospheric Convective Boundary Layer within a Zero-Order Jump Approach: An Extended Theoretical Framework
The paper presents an extended theoretical background for applied modeling of the atmospheric convective boundary layer within the so-called zero-order jump approach, which implies vertical homogeneity of meteorological fields in the bulk of ...
Evgeni Fedorovich
An Observational and Numerical Study of a Sheared, Convective Boundary Layer. Part I: Phoenix II Observations, Statistical Description, and Visualization
Four-dimensional velocity fields derived from dual Doppler radar observations are the basis of a description and statistical analysis of a convective, sheared planetary boundary layer during an afternoon over the High Plains of eastern Colorado. ...
Jeanne M. Schneider; Douglas K. Lilly
Relation between Mean Boundary-Layer Structure and Cloudiness at the R/V Valdivia during ASTEX
The relationship between boundary-layer thermodynamic structure and cloud fields and their diurnal variation are explored using seven days of data from dw R/V Valdivia during the Atlantic Stratocumulus Transition Experiment. Cloudiness is at a ...
Alan K. Betts; Christopher S. Bretherton; Ernst Klinker
Correction of Motional Electric Field Measurements for Galvanic Distortion
Interactions between motional electric fields and lateral gradients in electrical conductivity (e.g., seafloor topography) produce boundary electric charges and galvanic (i.e., noninductive) secondary electric fields that result in frequency-...
Alan D. Chave; Douglas S. Luther; Christopher S. Meinen
Contract Management Plan Outline
TABLE OF CONTENTS TABLE OF CONTENTS 1.0 Introduction/Overview ..................................................................................................... 1 2.0 Purpose/Applicability/Updates and Distribution........................................................... 1 3.0 Contract Summary ........................................................................................................... 3 4.0 Organizational Roles and Contract Oversight Responsibilities ................................... 6 5.0 Contract Authorities, Delegations and Limitations....................................................... 8 6.0 Contract Administration and Oversight....................................................................... 12 7.0 Communication Protocols ..............................................................................................
NMMSS PROJECT NMMSS PROJECT NMMSS UPGRADE SOFTWARE CONFIGURATION MANAGEMENT PLAN September 2001 Doc No: 135-PL-300A Revision: 1 REVIEWS AND APPROVALS Prepared by: _____________________________ ___________________________ xxxxx Date Software Project Manager _____________________________ ___________________________ xxxxx Date End-User Representative _____________________________ ___________________________ xxxxx Date Security Manager _____________________________ ___________________________ xxxxx Date Software Project Manager's Manager _____________________________ __________________________ xxxxx Date Vice President, Quality Approved by: _____________________________ __________________________
Office of the Executive Secretariat Document Online Coordination System (DOCS) Systems Configuration Management Plan (SCMP) October, 1998 U. S. DEPARTMENT OF ENERGY Assistant Secretary of Human Resources Administration Deputy Assistant Secretary for Information Management Operations, Management, Systems Support, and Customer Service Groups Table of Contents 1. INTRODUCTION ...............................................................................................................................................4 1.1. PURPOSE.........................................................................................................................................................4 1.2. SCOPE.............................................................................................................................................................4
NETL Final Report Outline
Sensor Evaluation for a Robotic In Line Inspection Vehicle for Sensor Evaluation for a Robotic In Line Inspection Vehicle for Detection of Natural Gas Pipeline Defects and Leaks Final Report February 2003 Submitted by Michael Hassard and Gerald Stoker Advanced Diagnostics and Production Testing Department Sandia National Laboratories P.O. Box 5800, MS 0555 And Mark Vaughn and Bob Bickerstaff Mobile Robotics Department Sandia National Laboratories P.O. Box 5800, MS1125 Albuquerque, NM 87185 This work was sponsored by The Strategic Center for Natural Gas Natural Gas Infrastructure Reliability Program, Natural Energy Technology Laboratory (NETL), DOE Office of Fossil Energy ABSTRACT When examining the condition of a pipeline, In-Line Inspection (ILI) utilizing various Non-Destructive Testing (NDT) methods is an essential tool and a significant factor in establishing a quality management
CALIFORNIA ENERGY CALIFORNIA ENERGY COMMISSION PIER Lighting Research Program Project 3.1 Retrofit Fluorescent Dimming with Integrated Lighting Controls FINAL REPORT Consultant Report November 2004 500-01-041-A-5 Arnold Schwarzenegger, Governor Deliverable 3.1.10 Final Report LBNL/Architectural Energy Corporation PIER Lighting Research Program 2 500-01-041 CALIFORNIA ENERGY COMMISSION Prepared By: Lawrence Berkeley National Laboratory Frances Rubinstein, Project Lead Berkeley, CA Managed By: Architectural Energy Corporation Judie Porter Program Director Boulder, CO CEC Contract # 500-01-041 Prepared For: Don Aumann Contract Manager Nancy Jenkins PIER Buildings Program Manager
Instrument for Airborne Remote Sensing of Transmission Instrument for Airborne Remote Sensing of Transmission Pipeline Leaks Final Report August 2004 Submitted by Thomas A. Reichardt, Sanjay Devdas, and Thomas J. Kulp Diagnostics and Remote Sensing Department Sandia National Laboratories P.O. Box 969, MS 9056 Livermore, CA 94551 and Wayne Einfeld Environmental Monitoring and Characterization Department Sandia National Laboratories P.O. Box 5800, MS 0755 Albuquerque, NM 87185 This work was sponsored by The Strategic Center for Natural Gas, Natural Gas Infrastructure Reliability Program, National Energy Technology Laboratory (NETL), DOE Office of Fossil Energy Abstract The pipeline industry would benefit considerably from the development of systems that could provide early warning capabilities for major pipeline integrity and safety issues indicated by
Evaluation of Active and Passive Gas Imagers for Transmission Pipeline Remote Leak Detection Final Report December 2002 Submitted by Thomas A. Reichardt, Sanjay Devdas, and Thomas...
2013 AAOCS Abstract Outline
Guidelines for submission Please submit abstracts by Friday the 20th September 2013 - Submissions can be for oral or poster presentations (please indicate preference) - Submit a single paragraph abstract of ...
Outline 2003 ASER
Air sparge and bioremediation activities continued at the Rock Springs, Wyoming, Oil Shale Retort site and at the Hoe Creek Underground Coal Gasification sites II and III. Hoe...
indicating that the Clean Commute Program can have a significant affect on gasoline usage and emissions. * Over 95% of all trips with the THNK city replaced trips that would...
Final draft report outline
Subcommittee also found the metrics and processes being developed for DOE by Gretchen Jordan, et al. to be valuable (Reference 2). In the current report the Subcommittee has...
Evaluation of Active and Passive Gas Imagers for Evaluation of Active and Passive Gas Imagers for Transmission Pipeline Remote Leak Detection Final Report December 2002 Submitted by Thomas A. Reichardt, Sanjay Devdas, and Thomas J. Kulp Diagnostics and Remote Sensing Department Sandia National Laboratories P.O. Box 969, MS 9056 Livermore, CA 94551 and Wayne Einfeld Environmental Monitoring and Characterization Department Sandia National Laboratories P.O. Box 5800, MS 0755 Albuquerque, NM 87185 This work was sponsored by The Strategic Center for Natural Gas Natural Gas Infrastructure Reliability Program, National Energy Technology Laboratory (NETL), DOE Office of Fossil Energy 2 Abstract The pipeline industry would benefit considerably from the development of systems that could provide early warning capabilities for major pipeline integrity and safety issues caused by leaks.
Outline for today
... Road map on Smart Grid standardization ... 2 . Optimized controls for system storage cells 15. ... 6 . Distribution automation systems 19. ...
INEEL/EXT-04-02482 INEEL/EXT-04-02482 U.S. Department of Energy FreedomCAR & Vehicle Technologies Program Advanced Vehicle Testing Activity NYPA/TH!NK Clean Commute Program Report - Inception through May 2004 TECHNICAL REPORT Don Karner James Francfort Randall Solomon November 2004 Idaho National Engineering and Environmental Laboratory Bechtel BWXT Idaho, LLC INEEL/EXT-04-02482 U.S. Department of Energy FreedomCAR & Vehicle Technologies Program Advanced Vehicle Testing Activity NYPA/TH!NK Clean Commute Program Report - Inception through May 2004 Don Karner 1 James Francfort 2 Randall Solomon 3 November 2004 Idaho National Engineering and Environmental Laboratory Transportation Technology and Infrastructure Department Idaho Falls, Idaho 83415
Fractional extensions of some boundary value problems in oil strata
In the present paper, we solve three boundary value problems related to the temperature field in oil strata -- the fractional extensions of the incomplete lumped formulation and lumped formulation in the linear case and the fractional generalization of the incomplete lumped formulation in the radial case. By using the Caputo differintegral operator and the Laplace transform, the solutions are obtained in integral forms where the integrand is expressed in terms of the convolution of some auxiliary functions of Wright function type. A generalization of the Laplace transform convolution theorem, known as Efros' theorem is widely used.
Garg, Mridula
Property:Building/Boundaries | Open Energy Information
Boundaries Boundaries Jump to: navigation, search This is a property of type String. Boundaries Pages using the property "Building/Boundaries" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + Several buildings + Sweden Building 05K0002 + Part of a building + Sweden Building 05K0003 + One building + Sweden Building 05K0004 + One building + Sweden Building 05K0005 + One building + Sweden Building 05K0006 + Several buildings + Sweden Building 05K0007 + One building + Sweden Building 05K0008 + One building + Sweden Building 05K0009 + One building + Sweden Building 05K0010 + One building + Sweden Building 05K0011 + One building + Sweden Building 05K0012 + One building + Sweden Building 05K0013 + One building + Sweden Building 05K0014 + One building +
Atomistic Simulation of Slow Grain Boundary Motion
Existing atomistic simulation techniques to study grain boundary motion are usually limited to either high velocities or temperatures and are difficult to compare to realistic experimental conditions. Here we introduce an ...
Deng, Chuang
Evaluating Formulations of Stable Boundary Layer Height
Stable boundary layer height h is determined from eddy correlation measurements of the vertical profiles of the buoyancy flux and turbulence energy from a tower over grassland in autumn, a tower over rangeland with variable snow cover during ...
D. Vickers; L. Mahrt
Subsidence in the Nocturnal Boundary Layer
Nights with clear skies and strong radiative cooling that favor the formation of statically stable nocturnal boundary layers (NBL) are also those nights most likely to have subsidence, because of the presence of synoptic high-pressure regions. ...
Merrilee A. Carlson; Roland B. Stull
Grain Boundary Energy Function for FCC Metals
Conference Tools for 2012 TMS Annual Meeting & Exhibition ... material-specific parameters that can be fit to energies measured or computed for just a handful of special boundaries. ... Cluster Expansion Methods - Progress and Outlook.
Propagation of Tracer Signals in Boundary Currents
The propagation of a range of tracer signals in a simple model of the deep western boundary current is examined. Analytical expressions are derived in certain limits for the transit-time distributions and the propagation times (tracer ages) of ...
Darryn W. Waugh; Timothy M. Hall
Nonlinear boundary value problem of magnetic insulation
On the basis of generalization of upper and lower solution method to the singular two point boundary value problems, the existence theorem of solutions for the system, which models a process of magnetic insulation in plasma is proved.
A. V. Sinitsyn
Radiation Boundary Conditions in Numerical Modeling
A two-dimensional anelastic model is used to study the propagation of errors arising from the use of open lateral boundaries. Reference experiments were performed using very large horizontal domains. Other experiments were carried out in smaller ...
Mark Hedley; M. K. Yau
Slope Control in Western Boundary Currents
An analytic solution is presented for the steady-state depth-averaged western boundary current flowing over the continental slope by combining three highly idealized models: the Stommel model, the Munk model, and the arrested topographic wave ...
Sang-Ki Lee; J. L. Pelegr�; John Kroll
Grain boundary dissipation in high-{Tc} superconductors
Thin-film and bulk [001] tilt bicrystal grain boundaries (GBs) in YBa{sub 2}Cu{sub 3}O{sub 7} exhibit a strong dependence of critical current density, J{sub c} on misorientation angle. What was initially difficult to understand was the 30x smaller J{sub c} in bulk GBs which are microscopically more perfect. The authors review an explanation of this zero-field data, which is based on the pinning of Josephson vortices by the meandering found in thin-film GBs. In addition, there is evidence that J{sub c} of GBs does not drop as quickly with applied magnetic field as expected by simple Josephson junction models. The long-wavelength pinning potential due to meandering is less effective at high fields, but Gurevich and Cooley (GC) proposed a new mechanism for an enhanced GB J{sub c} arising from pinned Abrikosov vortices in the banks of a GB which present a static, quasiperiodic pinning potential to pin GB vortices. They find a peak in J{sub c} and an unusual hysteresis which give considerable support to the GC concept. In low fields, the GBs exhibit a larger J{sub c} for field cooling, which is opposite to the usual hysteresis but agrees with GC due to the larger Abrikosov vortex density in the banks. Magnetization data on the same sample are consistent including the identification of the irreversibility field.
Gray, K. E.; Miller, D. J.; Field, M. B.; Kim, D. H.; Berghuis, P.
Causal Viscosity in Accretion Disc Boundary Layers
The structure of the boundary layer region between the disc and a comparatively slowly rotating star is studied using a causal prescription for viscosity. The vertically integrated viscous stress relaxes towards its equilibrium value on a relaxation timescale $\\tau$, which naturally yields a finite speed of propagation for viscous information. For a standard alpha prescription with alpha in the range 0.1-0.01, and ratio of viscous speed to sound speed in the range 0.02-0.5, details in the boundary layer are strongly affected by the causality constraint. We study both steady state polytropic models and time dependent models, taking into account energy dissipation and transport. Steady state solutions are always subviscous with a variety of $\\Omega$ profiles which may exhibit near discontinuities. For alpha =0.01 and small viscous speeds, the boundary layer adjusted to a near steady state. A long wavelength oscillation generated by viscous overstability could be seen at times near the outer boundary. Being confined there, the boundary layer remained almost stationary. However, for alpha =0.1 and large viscous speeds, short wavelength disturbances were seen throughout which could significantly affect the power output in the boundary layer. This could be potentially important in producing time dependent behaviour in accreting systems such as CVs and protostars.
W. Kley; J. C. B. Papaloizou
Home Science Highlights Science Briefs Crystallographic Boundary in a Magnetic Shape Memory Material Crystallographic Boundary in a Magnetic Shape Memory Material Print...
Tendency of Cooperative Grain Boundary Sliding in Nanocrystalline ...
Presentation Title, Tendency of Cooperative Grain Boundary Sliding in ... The objective of this research is to identify the tendency of cooperative grain boundary�...
3D scalar model as a 4D perfect conductor limit: Dimensional reduction and variational boundary conditions
Under dimensional reduction, a system in D spacetime dimensions will not necessarily yield its D-1-dimensional analog version. Among other things, this result will depend on the boundary conditions and the dimension D of the system. We investigate this question for scalar and Abelian gauge fields under boundary conditions that obey the symmetries of the action. We apply our findings to the Casimir piston, an ideal system for detecting boundary effects. Our investigation is not limited to extra dimensions and we show that the original piston scenario proposed in 2004, a toy model involving a scalar field in 3D (2+1) dimensions, can be obtained via dimensional reduction from a more realistic 4D electromagnetic (EM) system. We show that for perfect conductor conditions, a D-dimensional EM field reduces to a D-1 scalar field and not its lower-dimensional version. For Dirichlet boundary conditions, no theory is recovered under dimensional reduction and the Casimir pressure goes to zero in any dimension. This ''zero Dirichlet'' result is useful for understanding the EM case. We then identify two special systems where the lower-dimensional version is recovered in any dimension: systems with perfect magnetic conductor (PMC) and Neumann boundary conditions. We show that these two boundary conditions can be obtained from a variational procedure in which the action vanishes outside the bounded region. The fields are free to vary on the surface and have zero modes, which survive after dimensional reduction.
Edery, Ariel [Physics Department, Bishop's University, 2600 College Street, Sherbrooke, Quebec, J1M 0C8 (Canada); Kavli Institute for Theoretical Physics, University of California, Kohn Hall, Santa Barbara, California 93106 (United States); Graham, Noah [Kavli Institute for Theoretical Physics, University of California, Kohn Hall, Santa Barbara, California 93106 (United States); Department of Physics, Middlebury College, Middlebury, Vermont 05753 (United States); MacDonald, Ilana [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, Ontario, M5S 3H4 (Canada); Physics Department, Bishop's University, 2600 College Street, Sherbrooke, Quebec, J1M 0C8 (Canada)
Free-Field Representation of Permutation Branes in Gepner Models
We consider free-field realization of Gepner models basing on free-field realization of N=2 superconformal minimal models. Using this realization we analyse A/B-type boundary conditions starting from the ansatz when left-moving and right-moving free-fields degrees of freedom are glued at the boundary by an arbitrary constant matrix. It is shown that the only boundary conditions consistent with the singular vectors structure of unitary minimal models representations are given by permutation matrices and give thereby explicit free-field construction of permutation branes of Recknagel.
S. E. Parkhomenko
Boundary conditions for NLTE polarized radiative transfer with incident radiation
Polarized NLTE radiative transfer in the presence of scattering in spectral lines and/or in continua may be cast in a so-called reduced form for six reduced components of the radiation field. In this formalism the six components of the reduced source function are angle-independent quantities. It thus reduces drastically the storage requirement of numerical codes. This approach encounters a fundamental problem when the medium is illuminated by a polarized incident radiation, because there is a priori no way of relating the known (and measurable) Stokes parameters of the incident radiation to boundary conditions for the reduced equations. The origin of this problem is that there is no unique way of deriving the radiation reduced components from its Stokes parameters (only the inverse operation is clearly defined). The method proposed here aims at enabling to work with arbitrary incident radiation field (polarized or unpolarized). In previous works an ad-hoc treatment of the boundary conditions, applying to case...
Faurobert, Marianne; Atanackovic, Olga
Evolution of twisted magnetic fields
The magnetic field of the solar corona evolves quasistatically in response to slowly changing photospheric boundary conditions. The magnetic topology is preserved by the low resistivity of the solar atmosphere. We show that a magnetic flux coordinate system simplifies the problem of calculating field evolution with invariant topology. As an example, we calculate the equilibrium of a thin magnetic flux tube with small twist per unit length.
Zweibel, E.G.; Boozer, A.H.
Gluon field distribution in baryons
Methods for revealing the distribution of gluon fields within the three-quark static-baryon potential are presented. In particular, we outline methods for studying the sensitivity of the source on the emerging vacuum response for the three-quark system. At the same time, we explore the possibility of revealing gluon-field distributions in three-quark systems in QCD without the use of gauge-dependent smoothing techniques. Renderings of flux tubes from a preliminary high-statistics study on a 12^3 X 24 lattice are presented.
F. Bissey; F-G. Cao; A. Kitson; B. G. Lasscock; D. B. Leinweber; A. I. Signal; A. G. Williams; J. M. Zanotti
Importance of Low-Angle Grain Boundaries in YBa2Cu3O7-? Coated Conductors
behaviour of single grain boundaries in YBa2Cu3O7?? with an emphasis on those with misorientation angles less than 10 degrees. This cutoff is chosen following the work of Redwing and Heinig [65, 7] who showed, with some variation with magnetic field...
Durrell, John H; Rutter, Noel Anthony
Revisiting the Definition of the Drag Coefficient in the Marine Atmospheric Boundary Layer
A new functional form of the neutral drag coefficient for moderate to high wind speeds in the marine atmospheric boundary layer for a range of field measurements as reported in the literature is proposed. This new form is found to describe a wide ...
Richard J. Foreman; Stefan Emeis
Large-Eddy Simulations and Observations of Atmospheric Marine Boundary Layers above Nonequilibrium Surface Waves
Winds and waves in marine boundary layers are often in an unsettled state when fast-running swell generated by distant storms propagates into local regions and modifies the overlying turbulent fields. A large-eddy simulation (LES) model with the ...
Peter P. Sullivan; James B. Edson; Tihomir Hristov; James C. McWilliams
Effect of Top and Bottom Boundary Conditions on Symmetric Instability under Full-Component Coriolis Force
The linear stability of a zonal flow confined in a domain within horizontal top and bottom boundaries is examined under full consideration of the Coriolis force. The basic zonal flow is assumed to be in thermal wind balance with the density field ...
Toshihisa Itano; Akira Kasahara
A Model for Objective Simulation of Boundary-Layer Winds in an Area of Complex Terrain
An objective analysis model is formulated to simulate the boundary-layer wind field in an area of complex terrain on the island of Oahu, Hawaii. The model is designed to reproduce the effects of the terrain on the undisturbed trade wind flow in ...
D. Andr� Erasmus
The Amazon Boundary-Layer Experiment (ABLE 2B): A Meteorological Perspective
In July and August 1985, and April and May 1987, two atmospheric chemistry field experiments called the Amazon Boundary-layer Experiments, (ABLE 2A and 2B) were conducted from a base near Manaus, Brazil in the central Amazon basin. The ...
Michael Garstang; Steven Greco; John Scala; Robert Swap; Stanley Ulanski; David Fitzjarrald; David Martin; Edward Browell; Mark Shipman; Vickie Connors; Robert Harriss; Robert Talbot
Measurement of Turbulence in the Oceanic Bottom Boundary layer with an Acoustic Current Meter Array
A vertical array of acoustic current meters measures the vector flow field in the lowest 5 m of the oceanic boundary layer. By resolving the velocity to 0.03 cm s?1 over 15 cm paths, it samples the dominant turbulent eddies responsible for ...
Albert J. Williams 3rd; John S. Tochko; Richard L. Koehler; William D. Grant; Thomas F. Gross; Christopher V. R. Dunn
The IMADA-AVER Boundary Layer Experiment in the Mexico City Area
A boundary layer field experiment in the Mexico City basin during the period 24 February�22 March 1997 is described. A total of six sites were instrumented. At four of the sites, 915-MHz radar wind profilers were deployed and radiosondes were ...
J. C. Doran; X. Bian; S. F. J. de Wekker; S. Edgerton; J. D. Fast; J. M. Hubbe; W. J. Shaw; C. D. Whiteman; S. Abbott; C. King; J. Leach; M. Mulhearn; C. Russell; B. Templeman; D. Wolfe; J. Archuleta; S. Elliott; A. Fernandez; D. Langley; J. T. Lee; W. Porch; L. Tellier; J. Chow; J. G. Watson; R. L. Coulter; T. J. Martin; J. D. Shannon; R. White; D. Martinez; J. L. Martinez; V. Mora; G. Sosa; G. Mercado; J. L. Pena; R. Salas; R. Petty
Numerical Simulation of Transient Boundary-Forced Radiation. Part II: The Modon Regime
In Part I of the present work we studied the transient Rossby wave radiation excited in the far field by a northern boundary forcing. We proposed as a possible mechanism responsible for transient pulses of Rossby waves the sudden growth to finite ...
Paola Malanotte-Rizzoli; Roberta E. Young; Dale B. Haidvogel
Boundary representations and pure completely positive maps
In 2006, Arveson resolved a long-standing problem by showing that for any element $x$ of a separable self-adjoint unital subspace $S\\subseteq B(H)$, $\\|x\\|=\\sup\\|\\pi(x)\\|$, where $\\pi$ runs over the boundary representations for $S$. Here we show that "sup" can be replaced by "max". This implies that the Choquet boundary for a separable operator system is a boundary in the classical sense; a similar result is obtained in terms of pure matrix states when $S$ is not assumed to be separable. For matrix convex sets associated to operator systems in matrix algebras, we apply the above results to improve the Webster-Winkler Krein-Milman theorem.
Kleski, Craig
Wireless boundary monitor system and method
DOE Patents (OSTI)
A wireless boundary monitor system used to monitor the integrity of a boundary surrounding an area uses at least two housings having at least one transmitting means for emitting ultrasonic pressure waves to a medium. Each of the housings has a plurality of receiving means for sensing the pressure waves in the medium. The transmitting means and the receiving means of each housing are aimable and communicably linked. At least one of the housings is equipped with a local alarm means for emitting a first alarm indication whereby, when the pressure waves propagating from a transmitting means to a receiving means are sufficiently blocked by an object a local alarm means or a remote alarm means or a combination thereof emit respective alarm indications. The system may be reset either manually or automatically. This wireless boundary monitor system has useful applications in both indoor and outdoor environments.
Haynes, Howard D. (Knoxville, TN); Ayers, Curtis W. (Kingston, TN)
A wireless boundary monitor system used to monitor the integrity of a boundary surrounding an area uses at least two housings having at least one transmitting means for emitting ultrasonic pressure waves to a medium. Each of the housings has a plurality of receiving means for sensing the pressure waves in the medium. The transmitting means and the receiving means of each housing are aimable and communicably linked. At least one of the housings is equipped with a local alarm means for emitting a first alarm indication whereby, when the pressure waves propagating from a transmitting means to a receiving means are sufficiently blocked by an object a local alarm means or a remote alarm means or a combination thereof emit respective alarm indications. The system may be reset either manually or automatically. This wireless boundary monitor system has useful applications in both indoor and outdoor environments. 4 figs.
Haynes, H.D.; Ayers, C.W.
Tangential residual as error estimator in the boundary element method
In this paper a new error estimator based on tangential derivative Boundary Integral Equation residuals for 2D Laplace and Helmholtz equations is shown. The direct problem for general mixed boundary conditions is solved using standard and hypersingular ... Keywords: Adaptivity, Boundary Integral Equation residual, Boundary element method, Error estimation, Mesh adaptation, Mesh refinement, Nodal sensitivity
Alejandro E. Mart�nez-Castro; Rafael Gallego
An accurate moving boundary formulation in cut-cell methods
A cut-cell method for Cartesian meshes to simulate viscous compressible flows with moving boundaries is presented. We focus on eliminating unphysical oscillations occurring in Cartesian grid methods extended to moving-boundary problems. In these methods, ... Keywords: Compressible Navier-Stokes, Cut-cell method, Immersed boundary method, Moving boundary, Oscillating cylinder, Spurious force oscillations
Lennart Schneiders; Daniel Hartmann; Matthias Meinke; Wolfgang Schr�Der
151�0'0W 150�0'0W 149�0'0W 148�0'0W Northern Alaska (North ...
U.S. Energy Information Administration (EIA)
KUPARUK RIVER PRUDHOE BAY MILNE NPOINT ALPINE LISBURNE TARN BOREALIS NIAKUK ENDICOTT ORION ... Fields The mapped oil and gas field boundary outlines were created by
Boundary layer eddies at the Goodnoe Hills site
Data from nine instrumented meteorological towers at the MOD-2 wind turbine site at Goodnoe Hills in Washington State were analyzed to evaluate high-frequency perturbations, which were observed in the lower boundary-layer flow. Horizontal winds and temperature measurements for a period of 8 min, undisturbed by turbine operation, were available for this study. The data are in 1-s values from June 27, 1985. Throughout the study, departures from the mean for the period and for each sensor were used on area maps and on line-time and tower-time cross sections. Conventional streamline and isotach analyses were employed; they show highly organized flow fields with embedded perturbations traversing the site. Most of the flow fields have a well-developed vortical structure that reaches from the surface through the top level of the highest tower. These structures consist of a system of clockwise and counter-clockwise circulations. The wave length is about 500 to 600 m. Their wave speed is slightly greater than the mean wind speed and their movement is in the general direction of the mean flow. The results of the study show two main reasons why wind conditions and turbine power output in a wind farm may vary in a remarkable and abrupt fashion in space and time under certain circumstances: (1) The boundary-layer flow contains highly organized coherent perturbations with a typical size of 300 {times} 300 M{sup 2}. (2) The transition zones between the perturbations moving through a wind farm are associated with very definitive changes in the wind field that are on the order of meters and seconds. 2 refs., 11 figs.
Aspliden, C.I.; Wendell, L.L.; Clem, K.S.; Gower, G.L.
Nonlinear Regimes of Baroclinic Boundary Currents
A process study is conducted on the evolution of boundary currents in a two-layer quasigeostrophic model on the f plane. These currents are composed of two strips of uniform potential vorticity (PV), one in each layer, and both hugging the coast. ...
Xavier J. Capet; Xavier J. Carton
The Western Boundary Undercurrent off the Bahamas
Two tritium sections through the deep western boundary current east of the Bahamas taken in late 1980 and early 1981 are presented. Tritium from the bomb tests in the late 1950s and early 1960s is used to identify recently formed deep waters in ...
Donald B. Olson; Gote H. Ostlund; Jorge Sarmiento
Boundary stability under nonequilibrium conditions. Final report
Summaries of research accomplished are given for the following areas: Morphological (Diffusional) Stability; A New Algorithm for Numerical Modeling of Non-equilibrium Materials Behavior; A Unified Treatment of Single and Microcrystalline Film Edge Instabilities; and Validation of the Structure Based Grain Boundary Diffusion/Migration Model.
Hackney, S.A.; Lee, J.K.; Plichta, M.R.
Boundary-Layer Damping of Baroclinic Instability
A shooting method is applied to a 100-level perturbation model with an explicit Ekman layer. Growth rates for a no-slip boundary condition are similar to those found previously. It is noted that the large cross-isobaric flow of the classic Ekman ...
D. O. Staley
Spectral Domain Boundaries in Cellular Automata
Let A^{Z^D} be the Cantor space of Z^D-indexed configurations in a finite alphabet A, and let ? be the Z^D-action of shifts on A^{Z^D}. A cellular automaton is a continuous, ?-commuting self-map ? of A^{Z^D}, and a ?-invariant ... Keywords: Cellular automaton, defect, domain boundary, kink, subshift
Marcus Pivato
Parabolic systems with coupled boundary conditions
We consider elliptic operators with operator-valued coefficients and discuss the associated parabolic problems. The unknowns are functions with values in a Hilbert space $W$. The system is equipped with a general class of coupled boundary conditions of the form $f_{|\\partial\\Omega}\\in \\mathcal Y$ and $\\frac{\\partial f}{\\partial \
Stefano Cardanobile; Delio Mugnolo
Building boundaries and negotiating work at home
Millions of people are now working full-or part-time at home. Computer technology allows workers remote access to materials and facilitates communication with coworkers and supervisors. Companies are developing telecommuting programs to benefit both ... Keywords: boundaries, groups, home, telecommuting, telework, virtual environments, work
Christine Salazar
TCRD Boundary 1) Pacific Northwest National Laboratory
TCRD Boundary 1) Pacific Northwest National Laboratory 2) Fluor Hanford 3) Thompson Mechanical-Tech, Inc. 28) YAHSGS 29) Washington Closure Hanford 30) KinderCare 31) A.M. Express 32) Energy Solutions 33 (Cougar Café) 74) Corporate Wellness Center 75) University Park Condominiums 76) CH2M Hill Hanford Group
Simultaneous Measurement of Condensation and Thermal Accommodation Coefficients for Cloud Droplet Growth in Due Consideration of a New Moving Surface-Boundary Effect
A droplet growth theory that describes a new effect of vapor and temperature field shift due to the growth-based movement of droplet surface boundary (moving boundary effect) was derived and found to enhance the growth rate as a function of ...
Norihiko Fukuta; Marcus N. Myers
Crystallographic Characteristics of Grain Boundaries in Dense Yttria-Stabilized Zirconia
and that the boundary plane distribution is inversely correlated to the boundary energy distribution.
Lam Helmick; Shen J. Dillon; Kirk Gerdes; Randall Gemmen; Gregory S. Rohrer; Sridhar Seetharaman; Paul A. Salvador
Optimized boundary driven flows for dynamos in a sphere
We perform numerical optimization of the axisymmetric flows in a sphere to minimize the critical magnetic Reynolds number Rm{sub cr} required for dynamo onset. The optimization is done for the class of laminar incompressible flows of von Karman type satisfying the steady-state Navier-Stokes equation. Such flows are determined by equatorially antisymmetric profiles of driving azimuthal (toroidal) velocity specified at the spherical boundary. The model is relevant to the Madison plasma dynamo experiment, whose spherical boundary is capable of differential driving of plasma in the azimuthal direction. We show that the dynamo onset in this system depends strongly on details of the driving velocity profile and the fluid Reynolds number Re. It is found that the overall lowest Rm{sub cr} Almost-Equal-To 200 is achieved at Re Almost-Equal-To 240 for the flow, which is hydrodynamically marginally stable. We also show that the optimized flows can sustain dynamos only in the range Rm{sub cr}fields are presented.
Khalzov, I. V.; Brown, B. P.; Cooper, C. M.; Weisberg, D. B.; Forest, C. B. [Center for Magnetic Self Organization in Laboratory and Astrophysical Plasmas, University of Wisconsin-Madison, 1150 University Avenue, Madison, Wisconsin 53706 (United States)
Boundary layer structure over areas of heterogeneous heat fluxes
In general circulation models (GCMs), some properties of a grid element are necessarily considered homogeneous. That is, for each grid volume there is associated a particular combination of boundary layer depth, vertical profiles of wind and temperature, surface fluxes of sensible and latent heat, etc. In reality, all of these quantities may exhibit significant spatial variations within the grid area, and the larger the area the greater the likely variations. In balancing the benefits of higher resolution against increased computational time and expense, it is useful to consider what the consequences of such subgrid-scale variability may be. Moveover, in interpreting the results of a simulation, one must be able to define an appropriate average value over a grid. There are two aspects of this latter problem: (1) in observations, how does one take a set of discrete or volume-averaged measurements and relate these to properties of the entire domain, and (2) in computations, how can subgrid-scale features be accounted for in the model parameterizations To address these and related issues, two field campaigns were carried out near Boardman, Oregon, in June 1991 and 1992. These campaigns were designed to measure the surface fluxes of latent and sensible heat over adjacent areas with strongly contrasting surface types and to measure the response of the boundary layer to those fluxes. This paper discuses some initial findings from those campaigns.
Doran, J.C. (Pacific Northwest Lab., Richland, WA (United States)); Barnes, F.J. (Los Alamos National Lab., NM (United States)); Coulter, R.L. (Argonne National Lab., IL (United States)); Crawford, T.L. (National Oceanic and Atmospheric Administration, Oak Ridge, TN (United States). Air Resources Lab. Atmospheric Turbulence and Diffusion Div.)
In general circulation models (GCMs), some properties of a grid element are necessarily considered homogeneous. That is, for each grid volume there is associated a particular combination of boundary layer depth, vertical profiles of wind and temperature, surface fluxes of sensible and latent heat, etc. In reality, all of these quantities may exhibit significant spatial variations the grid area, and the larger the area the greater the likely variations. In balancing the benefits of higher resolution against increased computational time and expense, it is useful to consider what the consequences of such subgrid-scale variability may be. Moreover, in interpreting the results of a simulation, one must be able to define an appropriate average value over a grid. There are two aspects of this latter problem: (1) in observations, how does one take a set of discrete or volume-averaged measurements and relate these to properties of the entire domain, and (2) in computations, how can subgrid-scale features be accounted for in the model parameterizations? To address these and related issues, two field campaigns were carried out near Boardman, Oregon, in June 1991 and 1992. These campaigns were designed to measure the surface fluxes of latent and sensible heat over adjacent areas with strongly contrasting surface types and to measure the response of the boundary layer to those fluxes. This paper discusses some initial findings from those campaigns.
Doran, J.C. [Pacific Northwest Lab., Richland, WA (United States); Barnes, F.J. [Los Alamos National Lab., NM (United States); Coulter, R.L. [Argonne National Lab., IL (United States); Crawford, T.L. [National Oceanic and Atmospheric Administration, Oak Ridge, TN (United States). Air Resources Lab. Atmospheric Turbulence and Diffusion Div.
In general circulation models (GCMs), some properties of a grid element are necessarily considered homogeneous. That is, for each grid volume there is associated a particular combination of boundary layer depth, vertical profiles of wind and temperature, surface fluxes of sensible and latent heat, etc. In reality, all of these quantities may exhibit significant spatial variations within the grid area, and the larger the area the greater the likely variations. In balancing the benefits of higher resolution against increased computational time and expense, it is useful to consider what the consequences of such subgrid-scale variability may be. Moveover, in interpreting the results of a simulation, one must be able to define an appropriate average value over a grid. There are two aspects of this latter problem: (1) in observations, how does one take a set of discrete or volume-averaged measurements and relate these to properties of the entire domain, and (2) in computations, how can subgrid-scale features be accounted for in the model parameterizations? To address these and related issues, two field campaigns were carried out near Boardman, Oregon, in June 1991 and 1992. These campaigns were designed to measure the surface fluxes of latent and sensible heat over adjacent areas with strongly contrasting surface types and to measure the response of the boundary layer to those fluxes. This paper discuses some initial findings from those campaigns.
In general circulation models (GCMs), some properties of a grid element are necessarily considered homogeneous. That is, for each grid volume there is associated a particular combination of boundary layer depth, vertical profiles of wind and temperature, surface fluxes of sensible and latent heat, etc. In reality, all of these quantities may exhibit significant spatial variations the grid area, and the larger the area the greater the likely variations. In balancing the benefits of higher resolution against increased computational time and expense, it is useful to consider what the consequences of such subgrid-scale variability may be. Moreover, in interpreting the results of a simulation, one must be able to define an appropriate average value over a grid. There are two aspects of this latter problem: (1) in observations, how does one take a set of discrete or volume-averaged measurements and relate these to properties of the entire domain, and (2) in computations, how can subgrid-scale features be accounted for in the model parameterizations To address these and related issues, two field campaigns were carried out near Boardman, Oregon, in June 1991 and 1992. These campaigns were designed to measure the surface fluxes of latent and sensible heat over adjacent areas with strongly contrasting surface types and to measure the response of the boundary layer to those fluxes. This paper discusses some initial findings from those campaigns.
In-Situ Observation of the Stress-Induced Stochastic Twin Boundary Motion in off Stoichiometric NiMnGa Single Crystal
Stochastic motion of the type II twin boundary in off stoichiometric NiMnGa single crystal is confirmed by in-situ X-ray microdiffraction during external stress field loading. Assymmetry between tensile and compressive parts of the loading and large hysteresis loop is found. Formation of local strained regions is predecessing each boundary movement. The location of strained regions adjusts to the position of the twin boundary. Abrupt motion of the boundary correlates with the corresponding spikes at the load/displacement curve.
Barabash, Rozaliya [ORNL; Kirchlechner, Christoph [Max-Planck-Institut fur Eisenforschung, Germany; Robach, Odile [European Synchrotron Radiation Facility (ESRF); Sozinov, Alexei [AdaptaMat, Finland
Hierarchical Bayesian Approach to Boundary Value Problems with Stochastic Boundary Conditions
Boundary value problems are ubiquitous in the atmospheric and ocean sciences. Typical settings include bounded, partially bounded, global, and limited area domains, discretized for applications of numerical models of the relevant fluid equations. ...
Christopher K. Wikle; L. Mark Berliner; Ralph F. Milliff
Assimilating Coherent Doppler Lidar Measurements into a Model of the Atmospheric Boundary Layer. Part I: Algorithm Development and Sensitivity to Measurement Error
A four-dimensional variational data assimilation (4DVAR) algorithm for retrieval of spatially and temporally resolved velocity and thermodynamic fields within the atmospheric boundary layer (ABL) is described and applied to a coherent Doppler ...
Rob K. Newsom; Robert M. Banta
A Parameterization for Computing Grid-Averaged Solar Fluxes for Inhomogeneous Marine Boundary Layer Clouds. Part I: Methodology and Homogeneous Biases
A method of computing grid-averaged solar radiative fluxes for horizontally inhomogeneous marine boundary layer cloud fields is presented. Its underlying assumptions are as follows: i) the independent pixel approximation (IPA) is applicable and ...
Howard W. Barker
Abrupt grain boundary melting in ice
The effect of impurities on the grain boundary melting of ice is investigated through an extension of Derjaguin-Landau-Verwey-Overbeek theory, in which we include retarded potential effects in a calculation of the full frequency dependent van der Waals and Coulombic interactions within a grain boundary. At high dopant concentrations the classical solutal effect dominates the melting behavior. However, depending on the amount of impurity and the surface charge density, as temperature decreases, the attractive tail of the dispersion force interaction begins to compete effectively with the repulsive screened Coulomb interaction. This leads to a film-thickness/temperature curve that changes depending on the relative strengths of these interactions and exhibits a decrease in the film thickness with increasing impurity level. More striking is the fact that at very large film thicknesses, the repulsive Coulomb interaction can be effectively screened leading to an abrupt reduction to zero film thickness.
L. Benatov; J. S. Wettlaufer
Nuclear Power Plant Containment Pressure Boundary Research
Research to address aging of the containment pressure boundary in light-water reactor plants is summarized. This research is aimed at understanding the significant factors relating occurrence of corrosion, efficacy of inspection, and structural capacity reduction of steel containment and liners of concrete containment. This understanding will lead to improvements in risk-informed regulatory decision making. Containment pressure boundary components are described and potential aging factors identified. Quantitative tools for condition assessments of aging structures to maintain an acceptable level of reliability over the service life of the plant are discussed. Finally, the impact of aging (i.e., loss of shell thickness due to corrosion) on steel containment fragility for a pressurized water reactor ice-condenser plant is presented.
Cherry, J.L.; Chokshi, N.C.; Costello, J.F.; Ellingwood, B.R.; Naus, D.J.
Boundary Plasma Turbulence Simulations for Tokamaks
The boundary plasma turbulence code BOUT models tokamak boundary-plasma turbulence in a realistic divertor geometry using modified Braginskii equations for plasma vorticity, density (ni), electron and ion temperature (T{sub e}; T{sub i}) and parallel momenta. The BOUT code solves for the plasma fluid equations in a three dimensional (3D) toroidal segment (or a toroidal wedge), including the region somewhat inside the separatrix and extending into the scrape-off layer; the private flux region is also included. In this paper, a description is given of the sophisticated physical models, innovative numerical algorithms, and modern software design used to simulate edge-plasmas in magnetic fusion energy devices. The BOUT code's unique capabilities and functionality are exemplified via simulations of the impact of plasma density on tokamak edge turbulence and blob dynamics.
Xu, X; Umansky, M; Dudson, B; Snyder, P
Crosswalk of Target Capabilities to Core Capabilities The following table maps the target capabilities outlined in the former Target Capabilities List (TCL) version
capabilities outlined in the former Target Capabilities List (TCL) version 2.0, released in September 2007 was performed such that all thirty-seven target capabilities from the TCL were mapped; and each target target capability in the TCL. This crosswalk was created to support the transition that states
Harms, Kyle E.
Energy Unit lecture outline & graphics Fritz Stahr Tues 1/21/03 -Transportation of Energy & Energy of Transportation an intricate link
Energy Unit lecture outline & graphics Fritz Stahr Tues 1/21/03 - Transportation of Energy & Energy of Transportation an intricate link - history of settlement & industry largely due to transportation and energy supplies - initial towns on rivers or by sea where ships could service cargo as water
Connecting Windows 7 to the network This document outlines the procedure for setting up Windows 7 to use the College and University network. It assumes that
Connecting Windows 7 to the network This document outlines the procedure for setting up Windows 7 apart from the lack of networking facilities. If Windows 7 has not yet been installed, please see the documentation that came with Windows 7 or with the computer. You must not attempt to use the network until you
Goldschmidt, Christina
Wireless connection instructions -Windows This document outlines the procedure for setting up Windows7, Vista or XP to use the College wireless network. It assumes
Wireless connection instructions - Windows This document outlines the procedure for setting up Windows7, Vista or XP to use the College wireless network. It assumes that you have already connected your Wireless Networks window Registering your computer Start your web browser, ie. Internet Explorer Your
Gravity-induced phase-shift of light: outline of an interferometric test of the Equivalence Principle
I analyze the change of the interference pattern in an optical interferometer when it passes from rest to free fall. It is shown that the "disconnection" of the gravitational field causes a jump in the phase difference that could be measured with the current sensitivity of these instruments. For this reason, I propose to the optical interferometry community the possibility of a test of the Equivalence Principle based on the aforementioned effect.
Eduardo Diaz-Miguel
Remote field eddy current inspection
The Remote Field Eddy Current (RFEC) technique uses an internal probe to inspect conducting tubes nondestructively. A coaxial solenoidal exciter, energized with low frequency AC, and detector coils near the inside of the pipe wall are separated by about two pipe diameters to obtain through wall transmission and equal sensitivity to defects on the outside or inside of the pipe wall. Calculation methods are outlined and the voltage plane polar plot signal representation for defect measurement is described. Slit defect interactions in ferromagnetic and non-ferromagnetic tubes are discussed. Defect-induced anomalous fields are interpreted in terms of anomalous source eddy current and missing magnetization defect models. The use of computer animations to represent the time variations of high resolution field measurements and calculations is described.
Atherton, D.L. [Queen`s Univ., Kingston, Ontario (Canada). Dept. of Physics
Behavior of Turbulence Statistics in the Convective Boundary Layer
Velocity variances in the convective boundary layer are examined using data derived in PBL experiments over land (Minnesota) and ocean (the Coral Sea) supported by data from the Kansas study of the surface boundary layer. In the freely convective ...
B. B. Hicks
A Step toward Transparent Boundary Conditions for Meteorological Models
Transparent boundary conditions for the linearized shallow water equations are constructed by incorporating the boundary conditions into equations that describe unidirectional waves. The shallow water equations are then discretized using a semi-...
A. McDonald
An Open Boundary Condition for Numerical Coastal Circulation Models
Open boundaries (OBs) are usually unavoidable in numerical coastal circulation simulations. At OBs, an appropriate open boundary condition (OBC) is required so that outgoing waves freely pass to the exterior without creating reflections back into ...
Peifeng Ma; Ole Secher Madsen
Single-Point Closures in a Neutrally Stratified Boundary Layer
Closure assumptions often employed in single-point closure models for boundary-layer applications are evaluated against a neutrally stratified planetary boundary-layer flow generated by large-eddy simulation. The contributions from slow and rapid ...
Anders Andr�n; Chin-Hoh Moeng
Toward More Accurate Wave-Permeable Boundary Conditions
This paper investigates several fundamental aspects of wave-permeable, or �radiation,� lateral boundary conditions. Orlanski (1976) proposed that approximate wave-permeable boundary conditions could be constructed by advecting disturbances out of ...
Dale R. Durran; Ming-Jen Yang; Donald N. Slinn; Randy G. Brown
Boundary Conditions for Limited-Area Ensemble Kalman Filters
One aspect of implementing a limited-area ensemble Kalman filter (EnKF) involves the specification of a suitable ensemble of lateral boundary conditions. Two classes of methods to populate a boundary condition ensemble are proposed. In the first ...
Ryan D. Torn; Gregory J. Hakim; Chris Snyder
Autumnal Mixed-Phase Cloudy Boundary Layers in the Arctic
Two mixed-phase cloudy boundary layer events observed over the Arctic ice pack in autumn are extensively analyzed. The local dynamic and thermodynamic structure of the boundary layers is determined from aircraft measurements including analysis of ...
James O. Pinto
Surface and Grain Boundary Segregation in Oxides: Implications for ...
Abstract Scope, A comprehensive understanding of the segregation behavior ... We examine segregation to a series of grain boundaries as well as to free surfaces, ... Atomic-scale Observations of Grain Boundary Structure in Bismuth Telluride.
The Boundary Layer of Tropical Cyclone Kerry (1979)
The boundary layer structure of Tropical Cyclone Kerry (1979) is investigated using composite analysis of research aircraft, surface ship, and automatic weather station observations. The boundary layer was moist, convective, and strongly ...
Peter G. Black; Greg J. Holland
Choosing a Boundary Layer Parameterization for Tropical Cyclone Modeling
The boundary layer in a tropical cyclone is in some respects unlike that elsewhere in the atmosphere. It is therefore necessary to evaluate boundary layer parameterizations for their suitability for use in tropical cyclone simulation. Previous ...
The Role of Boundary Layer Processes in Limiting PV Homogenization
A ?-plane multilevel quasigeostrophic channel model with interactive static stability and a simplified parameterization of atmospheric boundary layer physics is used to study the role of different boundary layer processes in eddy equilibration ...
Yang Zhang; Peter H. Stone; Amy Solomon
A Cloudiness Transition in a Marine Boundary Layer
In situ aircraft data and lidar data are used to analyze a transition in the boundary layer thermodynamic structure from a clear boundary layer through small cumulus and broken stratocumulus to a deck of solid stratocumulus. The data was ...
Alan K. Betts; Reinout Boers
BLIPS: A System for Studying Benthic Boundary Layer Dynamics
A Boundary Layer Interaction Profiting System (BLIPS) has been developed to measure kinematic quantities necessary for verification of theoretical, two-phase boundary layer flow models. BLIPS sensors include electromagnetic current meters, ...
Charles E. Adams Jr.; Winfield Hill; Rodney Fredericks
Alternative Nonlocal Descriptions of Boundary-Layer Evolution
Two alternative parameterizations for nonlocal turbulence mixing are tested in a 1D boundary-layer model against a dataset from the 1983 Boundary-Layer Experiment (BLX83) in Oklahoma. One method, proposed previously by Stull and Driedonks, is ...
Qing Zhang; Roland Stull
Evaluation of Boundary Layer Depth Estimates at Summit Station, Greenland
Boundary layer conditions in polar regions have been shown to have a significant impact on the levels of trace gases in the lower atmosphere. The ability to properly describe boundary layer characteristics (e.g., stability, depth, and variations ...
B. Van Dam; D. Helmig; W. Neff; L. Kramer
Space-efficient boundary representation of volumetric objects
In this paper we present a compression technique for efficiently representing boundary objects from volumetric data-sets. Exploiting spatial coherency within object contours, we are able to reduce the size of the volumetric boundary down to the size ...
Lukas Mroz; Helwig Hauser
Surface wave multipath signals in near-field microwave imaging
Microwave imaging techniques are prone to signal corruption from unwanted multipath signals. Near-field systems are especially vulnerable because signals can scatter and reflect from structural objects within or on the boundary of the imaging zone. These ...
Paul M. Meaney; Fridon Shubitidze; Margaret W. Fanning; Maciej Kmiec; Neil R. Epstein; Keith D. Paulsen
Ocean Surface Pressure Fields from Satellite-Sensed Winds
The University of Washington's planetary boundary layer model is inverted to use remotely sensed satellite scatterometer-derived surface winds as input to calculate maritime surface pressure fields. The analysis of three different synoptic storm ...
Robert A. Brown; Gad Levy
Modelling and Grain Boundary Engineering for High Performance ...
... useful information for future development of polysilicon sollar cell with high performance photovoltaic and electric properties by grain boundary engineering,
Optimal Control of Free Boundary Problems with Surface ...
... Up, Optimal Control of Free Boundary Problems with Surface Tension Effects. Harbir Antil Department of Mathematical Sciences ...
High Throughput Quantification of Grain Boundary Segregation by ...
... by Correlative Transmission Electron Microscopy and Atom Probe Tomography ... Line Tension of Grain Boundary Triple Junctions in the Copper Tricrystals.
Free boundary regularity for a problem with right hand side
We consider a one-phase free boundary problem with variable coefficients and non-zero right hand side. We prove that flat free boundaries are $C^{1,\\alpha}$ using a different approach than the classical supconvolution method of Caffarelli. We use this result to obtain that Lipschitz free boundaries are $C^{1,\\alpha}$.
De Silva, Daniela
Pressure boundary conditions for computing incompressible flows with SPH
In Smoothed Particle Hydrodynamics (SPH) methods for fluid flow, incompressibility may be imposed by a projection method with an artificial homogeneous Neumann boundary condition for the pressure Poisson equation. This is often inconsistent with physical ... Keywords: Boundary conditions, Flow around obstacle, Incompressibility, Open-boundary flows, Pressure Poisson equation, Projection scheme, Smoothed Particle Hydrodynamics
S. Majid Hosseini; James J. Feng
Twin boundary cavitation in aged type 304 stainless steel
A transition from grain to twin boundary cavitation was observed in aged- and-creep-tested type 304 stainless steel. Evidence of twin boundary cavitation has also been observed for unaged material under certain test conditions. This same behavior was also found in aged type 316 stainless steel. Several possible reasons have been suggested for the absence of frequently observed grain boundary cavitation. (auth)
Sikka, V.K.; Swindeman, R.W.; Brinkman, C.R.
A System Level Boundary Scan Controller Board for VME Applications
In this article an application of boundary scan test at system level is analyzed. The objective is met through the description of the design and implementation options of a VME boundary scan controller board prototype and the corresponding software. ... Keywords: ATPG, IEEE 1149.1 boundary scan test, board level test and system level test
Nuno Cardoso; Carlos Beltr�n Almeida; Jos� Carlos Da Silva
Study of the Lateral Boundary Condition Temporal Resolution Problem and a Proposed Solution by Means of Boundary Error Restarts
To properly utilize coupled limited-area models (LAMs), the time scales of the cross-boundary fluxes in the available lateral boundary data must be assessed. In current operational practice, the update frequencies of these data are usually ...
Piet Termonia; Alex Deckmyn; Rafiq Hamdi
Seasonal Simulations of the Planetary Boundary Layer and Boundary-Layer Stratocumulus Clouds with a General Circulation Model
The UCLA general circulation model (GCM) has been used to simulate the seasonally varying planetary boundary layer (PBL), as well as boundary-layer stratus and stratocumulus clouds. The PBL depth is a prognostic variable of the GCM, incorporated ...
David A. Randall; James A. Abeles; Thomas G. Corsetti
Invariance properties of boundary sets of open embeddings of manifolds and their application to the abstract boundary
The {\\em abstract boundary\\/} (or {\\em {\\em a\\/}-boundary\\/}) of Scott and Szekeres \\cite{Scott94} constitutes a ``boundary'' to any $n$-dimensional, paracompact, connected, Hausdorff, $C^\\infty$-manifold (without a boundary in the usual sense). In general relativity one deals with a {\\em space-% time\\/} $(\\cM,g)$ (a 4-dimensional manifold $\\cM$ with a Lorentzian metric $g$), together with a chosen preferred class of curves in $\\cM$. In this case the {\\em a\\/}-boundary points may represent ``singularities'' or ``points at infinity''. Since the {\\em a\\/}-boundary itself, however, does not depend on the existence of further structure on the manifold such as a Lorentzian metric or connection, it is possible for it to be used in many contexts. In this paper we develop some purely topological properties of abstract boundary sets and abstract boundary points ({\\em a\\/}-boundary points). We prove, amongst other things, that compactness is invariant under boundary set equivalence, and introduce another invariant concept ({\\em isolation\\/}), which encapsulates the notion that a boundary set is ``separated'' from other boundary points of the same embedding. ....... [The abstract continues in paper proper - truncated to fit here.
Christopher J. Fama; Susan M. Scott
Anti-de Sitter boundary in Poincare coordinates
We study the space-time boundary of a Poincare patch of Anti-de Sitter (AdS) space. We map the Poincare AdS boundary to the global coordinate chart and show why this boundary is not equivalent to the global AdS boundary. The Poincare AdS boundary is shown to contain points of the bulk of the entire AdS space. The Euclidean AdS space is also discussed. In this case one can define a semi-global chart that divides the AdS space in the same way as the corresponding Euclidean Poincare chart.
Bayona, C A; Bayona, Carlos Alfonso; Braga, Nelson R. F.
Density functional theory was employed to investigate grain boundary (GB) properties of W alloys. A range of substitutional solutes across the Periodic Table was investigated to understand the behavior of different electronic orbitals in changing the GB cleavage energy in the ?27a[110]{525} GB. A number of transition metals were predicted to enhance the GB cohesion. This includes Ru, Re, Os, Ir, V, Cr, Mn, Fe, Co, Ti, Hf, Ta and Nb. While lanthanides, s and p elements were tended to cause GB embrittlement.
Setyawan, Wahyu; Kurtz, Richard J.
The minisodar and planetary boundary layer studies
The minisodar, in addition to being smaller than conventional sodar, operates at higher frequencies, obtains usable signal returns closer to the surface, and can use smaller range gates. Because the max range is generally limited to the lower 200 m above the surface, the minisodar is not able to interrogate the entire daytime atmospheric Planetary Boundary Layer (PBL); however it can be a very useful tool for understanding the PBL. In concert with other instruments, the minisodar can add significant new insights to our understanding of the PBL. This paper gives examples of past and potential uses of minisodars in such situations.
Coulter, R.L.
Grain boundary characterization in an X750 alloy
Grain boundary chemistry in an X750 Ni alloy was analyzed by atom probe tomography in an effort to clarify the possible roles of elemental segregation and carbide presence on the stress corrosion cracking behavior of Ni alloys. Two types of cracks are observed: straight cracks along twin boundaries and wavy cracks at general boundaries. It was found that carbides (M23C6 and TiC) are present at both twin and general boundaries, with comparable B and P segregation for all types of grain boundaries. Twin boundaries intercept ?� precipitates while the general boundaries wave around the ?� and carbide precipitates. Near a crack tip, oxidation takes place on the periphery of carbide precipitate.
Kevin Fisher; Sebastien Teysseyre; Emmanuelle Marquis
Particle exhaust from plasma discharges with an expanded-boundary divertor
Measurements of the divertor-region plasma characteristics and argon exhaust efficiencies of the expanded-boundary divertor are reported. High plasma and neutral-hydrogen densities (approx.10/sup 14//cm/sup -3/) are observed in the divertor region, and the exhaust efficiency for injected argon exceeds 95%. A simple model based on electron heat conduction parallel to the diverted field lines and frictional force due to proton-argon collisions in the divertor region accurately describes the experimental observations.
Mahdavi, M.A.; DeBoo, J.C.; Hsieh, C.L.; Ohyabu, N.; Stambaugh, R.D.; Wesley, J.C.
An Interactive Method for Processing and Display of Sea-Surface Temperature Fields Using VAS Multispectral Data
A technique for interactively producing sea-surface temperatures (SST)from VAS multispectral radiance observations and displaying the derived field is outlined. High-resolution composite images using data from several times per day and over a ...
John J. Bates; William L. Smith; Gary S. Wade; Harold M. Woo1f
Dynamic Boundaries of Event Horizon Magnetospheres
This Letter analyzes 3-dimensional simulations of Kerr black hole magnetospheres that obey the general relativistic equations of perfect magnetohydrodynamics (MHD). Particular emphasis is on the event horizon magnetosphere (EHM) which is defined as the the large scale poloidal magnetic flux that threads the event horizon of a black hole (This is distinct from the poloidal magnetic flux that threads the equatorial plane of the ergosphere, which forms the ergospheric disk magnetosphere). Standard MHD theoretical treatments of Poynting jets in the EHM are predicated on the assumption that the plasma comprising the boundaries of the EHM plays no role in producing the Poynting flux. The energy flux is electrodynamic in origin and it is essentially conserved from the horizon to infinity, this is known as the Blandford-Znajek (B-Z) mechanism. To the contrary, within the 3-D simulations, the lateral boundaries are strong pistons for MHD waves and actually inject prodigious quantities of Poynting flux into the EHM. At high black hole spin rates, strong sources of Poynting flux adjacent to the EHM from the ergospheric disk will actually diffuse to higher latitudes and swamp any putative B-Z effects. This is in contrast to lower spin rates, which are characterized by much lower output powers and modest amounts of Poynting flux are injected into the EHM from the accretion disk corona.
Brian Punsly
Soot profiles in boundary-layer flames
Carbon particulate volume fractions and approximate particle size distributions are measured in a free laminar combusting boundary layer for liquid hydrocarbon fuels (n-heptane, iso-octane, cyclohexane, cyclohexene, toluene) and polymethylmethacrylate (PMMA). A multiwavelength laser transmission technique determines a most probable radius and the total particle concentration, which are two parameters in an assumed form for the size distribution. In the combusting boundary layer, a sooting region exists between the pyrolyzing fuel surface and the flame zone. The liquid fuel soot volume fractions, f/sub v/, range from f/sub v/ approx. 10/sup -7/ for n-heptane, a paraffin, to f/sub v approx. 10/sup -5/ for toluene, an aromatic. The PMMA volume fractions, f/sub v/ approx. 5 X 10/sup -7/, are approximately the same as the values previously reported for pool fires. The soot volume fractions increase with height; convection of carbon particles downstream widens the soot region with height. For all fuels tested, the most probable radius is between 20 nm and 50 nm, and it changes only slightly with height and distance from the fuel surface.
Beier, R.A.; Pagni, P.J.
ARM - Field Campaign - Precision Gas Sampling (PGS) Validation Field
govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign govCampaignsPrecision Gas Sampling (PGS) Validation Field Campaign Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : Precision Gas Sampling (PGS) Validation Field Campaign 2003.04.02 - 2003.09.02 Lead Scientist : Marc Fischer For data sets, see below. Description Ecosystem-atmosphere exchange of carbon, water, and energy varies with climate, soil, and land management, in ways 1) that influence the CO2 flux and planetary boundary layer CO2 concentration in ARM CART and 2) that we can model and predict. This activity repeated portable flux system measurements that we performed in spring 2002, by continuing measurements of the spatial heterogeneity of carbon, water, and energy fluxes in fields surrounding the ARM SGP Central Facility (CF).
Moving branes in the presence of background tachyon fields
We compute the boundary state associated with a moving Dp-brane in the presence of the open string tachyon field as a background field. The effect of the tachyon condensation on the boundary state is discussed. It leads to a boundary state associated with a lower-dimensional moving D-brane or a stationary instantonic D-brane. The former originates from condensation along the spatial directions and the latter comes from the temporal direction of the D-brane worldvolume. Using the boundary state, we also study the interaction amplitude between two arbitrary Dp{sub 1}- and Dp{sub 2}-branes. The long-range behavior of the amplitude is investigated, demonstrating an obvious deviation from the conventional form, due to the presence of the background tachyon field.
Rezaei, Z., E-mail: firstname.lastname@example.com; Kamani, D., E-mail: email@example.com [Amirkabir University of Technology (Tehran Polytechnic), Physics Department (Iran, Islamic Republic of)
On Nahm's transformation with twisted boundary conditions
Following two different tracks, we arrive at a definition of Nahm's transformation valid for self-dual fields on the 4-dimensional torus with non-zero twist tensor.The transform is again a self-dual gauge field defined on a new torus and with non-zero twist tensor. It preserves the property of being an involution.
A. Gonzalez-Arroyo
Particle-in-Cell Simulations of Relativistic Shear Flow Boundary Layer
Using 2.5-dimensional Particle-in-Cell simulations, we studied the kinetic physics of relativistic shear flows. We find efficient magnetic field generation and nonthermal particle acceleration at the shear boundary. Ordered flux tubes/sheets with alternating polarities and peak fields reaching equipartition values are generated and sustained by the free-energy of the shear flow. Nonthermal high-energy particles are accelerated by diffusive acceleration. A quasi-power-law tail truncated at low energies is achieved at strong shears. These results have important implications for the dissipation and radiation of relativistic jets.
Liang, Edison; Boettcher, Markus
SELECTING A CONSULTANT IN THE RESOURCE RECOVERY FIELD HENRY V. TEASE Combustion Engineering, Inc. Windsor, Connecticut ABSTRACT This paper outlines a set of criteria which can be used to select used to select a construc tion manager for a large resource recovery project. BACKGROUND Interest
Columbia University
Nocturnal Low-Level-Jet-Dominated Atmospheric Boundary Layer Observed by a Doppler Lidar over Oklahoma City during JU2003
Boundary layer wind data observed by a Doppler lidar and sonic anemometers during the mornings of three intensive observational periods (IOP2, IOP3, and IOP7) of the Joint Urban 2003 (JU2003) field experiment are analyzed to extract the mean and ...
Yansen Wang; Cheryl L. Klipp; Dennis M. Garvey; David A. Ligon; Chatt C. Williamson; Sam S. Chang; Rob K. Newsom; Ronald Calhoun
The problem of current continuity and viscous drag at the boundaries in rotating-plasma experiments is discussed. A hypothetical model having a steady state with axial symmetry is emphasized; it is shown that the discharge impedance derived from this model does not agree with many observations. The Homopolar III'' experiment is described in which the flux surfaces were strongly convex and parallel to the toroidal-shaped electrodes. In this way friction at the insulators was reduced. But the structure of the discharge deviated drastically from axial symmetry near the outer surface. Several studies led to the conclusion that the flow pattern probably involved secondary flows. A detailed analysis of this structure was not possible. It was also found that the rotational speed could not be raised above a few cm/ mu sec because the insulators failed in spite of the special design of the experiment. 28 references. (auth)
Kunkel, W.B.; Baker, W.R.; Bratenahl, A.; Halbach, K.
Notes on parafermionic QFT's with boundary interaction
The main result of these notes is an analytical expression for the partition function of the circular brane model for arbitrary values of the topological angle. The model has important applications in condensed matter physics. It is related to the dissipative rotator (Ambegaokar-Eckern-Schon) model and describes a ``weakly blocked'' quantum dot with an infinite number of tunneling channels under a finite gate voltage bias. A numerical check of the analytical solution by means of Monte Carlo simulations has been performed recently. To derive the main result we study the so-called boundary parafermionic sine-Gordon model. The latter is of certain interest to condensed matter applications, namely as a toy model for a point junction in the multichannel quantum wire.
S. L. Lukyanov
Reflection and transmission at dimensional boundaries
An inhomogeneous Kaluza-Klein compactification of a higher dimensional spacetime may give rise to an effective 4d spacetime with distinct domains having different sizes of the extra dimensions. The domains are separated by domain walls generated by the extra dimensional scale factor. The scattering of electromagnetic and massive particle waves at such boundaries is examined here for models without warping or branes. We consider the limits corresponding to thin (thick) domain walls, i.e., limits where wavelengths are large (small) in comparison to wall thickness. We also obtain numerical solutions for a wall of arbitrary thickness and extract the reflection and transmission coefficients as functions of frequency. Results are obtained which qualitatively resemble those for electroweak domain walls and other "ordinary" domain walls for 4d theories.
Nelson De Leon; John Morris
A Reduced-Boundary-Function Method for Convective Heat Transfer With Axial Heat Conduction and Viscous Dissipation
We introduce a new method of solution for the convective heat transfer under forced laminar flow that is confined by two parallel plates with a distance of 2a or by a circular tube with a radius of a. The advection-conduction equation is first mapped onto the boundary. The original problem of solving the unknown field T(x,r,t) is reduced to seek the solutions of T at the boundary (r = a or r = 0, r is the distance from the centerline shown in Fig. 1), i.e., the boundary functions T{sub a}(x,t) {triple_bond} T(x,r=a,t) and/or T{sub 0}(x,t) {triple_bond} T(x,r=0,t). In this manner, the original problem is significantly simplified by reducing the problem dimensionality from 3 to 2. The unknown field T(x,r,t) can be eventually solved in terms of these boundary functions. The method is applied to the convective heat transfer with uniform wall temperature boundary condition and with heat exchange between flowing fluids and its surroundings that is relevant to the geothermal applications. Analytical solutions are presented and validated for the steady-state problem using the proposed method.
Zhijie Xu
A Reduced-Boundary-Function Method for Convective Heat Transfer with Axial Heat Conduction and Viscous Dissipation
We introduce a method of solution for the convective heat transfer under forced laminar flow that is confined by two parallel plates with a distance of 2a or by a circular tube with a radius of a. The advection-conduction equation is first mapped onto the boundary. The original problem of solving the unknown field is reduced to seek the solutions of T at the boundary (r=a or r=0, r is the distance from the centerline shown in Fig. 1), i.e. the boundary functions and/or . In this manner, the original problem is significantly simplified by reducing the problem dimensionality from 3 to 2. The unknown field can be eventually solved in terms of these boundary functions. The method is applied to the convective heat transfer with uniform wall temperature boundary condition and with heat exchange between flowing fluids and its surroundings that is relevant to the geothermal applications. Analytical solutions are presented and validated for the steady state problem using the proposed method.
Xu, Zhijie
United States stem cells research boundaries
Recent empirical work has demonstrated the importance of a number of elements of scientific infrastructure that seem to be crucial particularly in fields such as molecular and cellular biology in which the materiality of ...
Elichabe, Beno�t
Boundary-Forced Nonlinear Planetary Radiation
In recent years there has been renewed interest in the Gulf Stream system and its interaction with the mesoscale oceanic eddy field. An important question, not yet adequately addressed, concern the possible generation mechanisms of the mesoscale ...
Paola Malanotte-Rizzoli
Confining Boundary conditions from dynamical Coupling Constants
It is shown that it is possible to consistently and gauge invariantly formulate models where the coupling constant is a non trivial function of a scalar field . In the $U(1)$ case the coupling to the gauge field contains a term of the form $g(\\phi)j_\\mu (A^{\\mu} +\\partial^{\\mu}B)$ where $B$ is an auxiliary field and $j_\\mu$ is the Dirac current. The scalar field $\\phi$ determines the local value of the coupling of the gauge field to the Dirac particle. The consistency of the equations determine the condition $\\partial^{\\mu}\\phi j_\\mu = 0$ which implies that the Dirac current cannot have a component in the direction of the gradient of the scalar field. As a consequence, if $\\phi$ has a soliton behaviour, like defining a bubble that connects two vacuua, we obtain that the Dirac current cannot have a flux through the wall of the bubble, defining a confinement mechanism where the fermions are kept inside those bags. Consistent models with time dependent fine structure constant can be also constructed
E. I. Guendelman; R. Steiner
Solidification Behavior at Fusion Boundary Region in Dissimilar ...
Different dilutions were performed in the button arc melting process in order to simulate the fusion boundary region and then analyzed using SSDTA� technique.
Statistics of Grain Boundary Crystallography in Surrogates for Oxide ...
Presentation Title, Statistics of Grain Boundary Crystallography in Surrogates for ... of TIG Welded and Laser-surface Melted SUS 304 for Nuclear Power Plants.
The Structure of Uranium Dioxide Grain Boundaries and its ...
The atomic structures of symmetric ?5 tilt, ?5 twist, and amorphous grain boundaries in uranium dioxide are explored in this work using empirical potentials and�...
Effects of Grain Boundary Precipitation on Creep Rupture Properties ...
gas turbine disks 'JU5). For Alloy 706, a stabilizing heat treatment is proposed to improve the creep rupture life, which is performed to produced grain boundary�...
Atlantic NAD83 Submerged Lands Act Boundary | Data.gov
NAD83 Submerged Lands Act Boundary Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean Data Atlantic...
Atlantic NAD 83 Continental Shelf Boundary (CSB) | Data.gov
Continental Shelf Boundary (CSB) Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean Data Atlantic NAD 83...
A Rate Equation for the Nocturnal Boundary-Layer Height
A rate equation is derived which describes the development of the boundary-layer height under stable conditions as a function of time.
F. T. M. Nieuwstadt; H. Tennekes
Boundary Layer Flame Spread over PMMA within the Initial ...
... INTRODUCTION Boundary layer-type flames are prevalent in wall fires, ceiling fires, and wind-driven fires on flat surfaces such as floors and roofs. ...
Regional Scale Surface CO2 Exchange Estimates Using a Boundary...
boundary layer height, and equated entrainment rate with large-scale subsidence velocities obtained from (1) NCEP reanalysis, (2) the Rapid Update Cycle (RUC)...
Atomic-scale Characterization of Grain Boundary Embrittlement in ...
The present study was performed determine the grain boundary chemistry in .... Creep of Service-Exposed SUS 316 HTB Superheater Tubes of Fossil Boilers.
The Current-voltage Characteristics of Grain Boundaries in Ionic ...
Presentation Title, The Current-voltage Characteristics of Grain Boundaries in Ionic ... A High-temperature M�ssbauer Study of Iron-doped Ruddlesden-popper �...
A class of moving boundary problems arising in drying processes
Keywords: drying processes, heat and mass transfer, moving boundary value problems, multiphase flows in porous media, quasilinear parabolic systems, wellposedness of solutions
M. Ilic
Grain Boundary Characterization of Solid Oxide Fuel Cell Cathode ...
However, little is known about the crystallographic nature of grain boundaries and pore ... Computer Simulations of Realistic Multi-Phase Three-Dimensional�...
Computed Grain Boundary Energies: Trends among Elements and ...
The energies computed for boundaries in different elements but with the ... In-Situ TEM Investigation of Interfacial Processes in Aqueous and Environmental�...
Study of the Relationship between Twin Boundary Fraction and ...
The twin boundary fraction, given as multiples of random distribution (MRD), ... Strain Gradient and Degradation in Magnetic Properties: Focus Transformer Steel.
Calculation of Grain Boundary Mobility in Slow-Moving Nickel ...
Grain boundaries with a wide range of mobility are selected in this study. .... Grains: Molecular-Dynamics Simulations and In-Situ Electron Microscopy Studies of�...
The Mobility and Grain Boundaries Study of Austenite-Ferrite ...
Atomic-Scale Modeling of the Mobility of Boundaries of Deformation Twins in .... Molecular-Dynamics Simulations and In-Situ Electron Microscopy Studies of�...
A Comprehensive Investigation of Low Angle Grain Boundary ...
Abstract Scope, Grain boundary mobility plays influential role in controlling the ... A New Treatment for the Kinetics of Isothermal Oxidation of Zinc Powders.
The Quantification of Resistance of Grain Boundaries to Short ...
Presentation Title, The Quantification of Resistance of Grain Boundaries to Short Fatigue Crack Propagation in Three-Dimensions in High Strength Al Alloys.
Effects of Grain Boundary Morphology and Dislocation Substructure ...
South Dakota School of Mines & Technology, Rapid City, SD 57701, USA. Abstract. An extensive investigation of the effects of grain boundary morphology.
Impact of MHD Equilibrium Input Variations on the High-Beta Stability Boundaries of NSTX
Ideal MHD stability limits of anticipated plasma configurations for the National Spherical Torus Experiment (NSTX) [Ono, M., et al., Nucl. Fusion 40 (2000) 557] and the dependence on the parameters defining the MHD equilibrium are evaluated. The study provides a quantitative computational evaluation of the stability limit variations induced by changes to the equilibrium of NSTX high-beta plasmas. The analysis is based on a reference free-boundary equilibrium with beta = 41.5%, monotonic safety factor q profile, and broad pressure profile p. On this reference target local variation of the plasma boundary, safety factor q, and pressure p profiles are imposed. Localized inflection of the outboard plasma boundary, produced by near-field effects from poloidal shaping field coils, weaken the stability due to the destabilization of high-n ballooning modes. Variation of the q profile at different radial location can also degrade stability. Both experimental profiles from existing tokamaks and spherical torus machines and profiles generated from transport modeling of anticipated neutral-beam-heated plasmas are used. Degraded stability is found at increasing pressure peaking factor due to the destabilization of n = 1 kink/ballooning modes. Direct access to the second region of stability is found in certain configurations and, for the entire set of variations considered, the lower calculated beta-limits values are still in the range of 20.0% without considering the stabilizing effect of the passive conducting structures.
F. Paoletti; S.A. Sabbagh; J. Manickam; J. Menard; R.J. Akers; D. Gates; S.M. Kaye; L. Lao
Boundary diffraction wave integrals for diffraction modeling of external occulters
An occulter is a large diffracting screen which may be flown in conjunction with a telescope to image extrasolar planets. The edge is shaped to minimize the diffracted light in a region beyond the occulter, and a telescope may be placed in this dark shadow to view an extrasolar system with the starlight removed. Errors in position, orientation, and shape of the occulter will diffract additional light into this region, and a challenge of modeling an occulter system is to accurately and quickly model these effects. We present a fast method for the calculation of electric fields following an occulter, based on the concept of the boundary diffraction wave: the 2D structure of the occulter is reduced to a 1D edge integral which directly incorporates the occulter shape, and which can be easily adjusted to include changes in occulter position and shape, as well as the effects of sources---such as exoplanets---which arrive off-axis to the occulter. The structure of a typical implementation of the algorithm is include...
Cady, E
Numerical Characteriztion of the Fracture Behavior of Solid Oxide Fuel Cell Materials by Means of Modified Boundary Layer Modeling
A modified boundary layer modeling approach is used to predict the fracture toughness and crack resistance behaviors of solid oxide fuel cell (SOFC) materials. In this approach, a pre-existing crack inside a layer or at an interface between two different layers is assumed under plane strain conditions. Fracture is allowed to occur in a small process window situated at the crack tip. The process window is contained in a circular region, which can involve two different materials and their interface. Elastic asymptotic crack-tip fields are prescribed as remote boundary conditions. Special attention focuses on the cracking of the interface between the glass seal and the electrolyte material.
Nguyen, Ba Nghiep; Koeppel, Brian J.; Singh, Prabhakar; Khaleel, Mohammad A.; Ahzi, Said
Boundary integral methods for unsaturated flow
Many large simulations may be required to assess the performance of Yucca Mountain as a possible site for the nations first high level nuclear waste repository. A boundary integral equation method (BIEM) is described for numerical analysis of quasilinear steady unsaturated flow in homogeneous material. The applicability of the exponential model for the dependence of hydraulic conductivity on pressure head is discussed briefly. This constitutive assumption is at the heart of the quasilinear transformation. Materials which display a wide distribution in pore-size are described reasonably well by the exponential. For materials with a narrow range in pore-size, the exponential is suitable over more limited ranges in pressure head. The numerical implementation of the BIEM is used to investigate the infiltration from a strip source to a water table. The net infiltration of moisture into a finite-depth layer is well-described by results for a semi-infinite layer if {alpha}D > 4, where {alpha} is the sorptive number and D is the depth to the water table. the distribution of moisture exhibits a similar dependence on {alpha}D. 11 refs., 4 figs.,
Martinez, M.J.; McTigue, D.F.
Visualization of the Operating Boundaries (VOB) 1.0
Visualization of the Operating Boundaries (VOB) 1.0�provides�visualization of power system operating boundaries and margins.Benefits & ValueImprove situational awarenessOperator-friendly graphical user interface (GUI)Consolidate of multiple data sources for visualizationOperating SystemWindows XP/Vista/7Internet Explorer 8 or ...
Evolution of a Marine Boundary-Layer Jet
High-resolution profiles of temperature and wind-speed measurements were made with a tethered baloon in and above the marine boundary layer at San Nicolas Island (SNI) during a period when the cloud-free boundary layer grew from near the sea ...
H. Gerber; Simon Chang; Teddy Holt
A modified boundary integral evolution formulation for the wave equation
We apply a modified boundary integral formulation otherwise known as the Green element method (GEM) to the solution of the two-dimensional scalar wave equation. GEM essentially combines three techniques namely: (a) finite difference approximation of ... Keywords: Boundary element method, Green element method, Overhauser elements, Wave equation
Okey Oseloka Onyejekwe
Enterprises as systems: Context, boundaries, and practical implications
The focus of this paper is to describe the domain of enterprise analysis. This is accomplished through an exploration of relevant definitions, a discussion on boundaries, and a summary of practical implications for researchers and practitioners. Specifically, ... Keywords: Enterprise boundaries, enterprise analysis, enterprise architecting, enterprise integration, enterprise transformation, lean
Ricardo Valerdi; Deborah Nightingale; Craig Blackburn
Model of Trace Gas Flux in Boundary Layer
Mathematical model of the turbulent flux in the three-layer boundary system is presented. Turbulence is described as a presence of the nonzero vorticity. Generalized advection-diffusion-reaction equation is derived for arbitrary number components in the flux. The fluxes in the layers are objects for matching requirements on the boundaries between the layers.
I. I. Vasenev; I. S. Nurgaliev
Linear and nonlinear degenerate boundary value problems in Besov spaces
The boundary value problems for linear and nonlinear degenerate differential-operator equations in Banach-valued Besov spaces are studied. Several conditions for the separability of linear elliptic problems are given. Moreover, the positivity and the ... Keywords: Banach-valued Besov spaces, Boundary value problems, Differential-operator equations, Interpolation of Banach spaces, Operator-valued multipliers
Veli B. Shakhmurov; Ravi P. Agarwal
An immersed boundary method for complex incompressible flows
An immersed boundary method for time-dependent, three-dimensional, incompressible flows is presented in this paper. The incompressible Navier-Stokes equations are discretized using a low-diffusion flux splitting method for the inviscid fluxes and second-order ... Keywords: High Reynolds number flows, Immersed boundary method, Incompressible Navier-Stokes equations
Jung-Il Choi; Roshan C. Oberoi; Jack R. Edwards; Jacky A. Rosati
A major lithospheric boundary in eastern California defined by isotope
major lithospheric boundary in eastern California defined by isotope major lithospheric boundary in eastern California defined by isotope ratios in Cenozoic basalts from the Coso Range and surrounding areas Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: A major lithospheric boundary in eastern California defined by isotope ratios in Cenozoic basalts from the Coso Range and surrounding areas Details Activities (1) Areas (1) Regions (0) Abstract: Sr and Nd isotope ratios of Miocene-Recent basalts in eastern California, when screened for crustal contamination, vary dramatically and indicate the presence of a major lithospheric boundary that is not obvious from surface geology. Tectonic and geochemical interpretation of this boundary is difficult, however, because there are so many potential
Dusty boundary layer in a surface-burst explosion
Dusty boundary layers are an inherent feature of explosions over ground surfaces. Detailed knowledge of dusty boundary layer characteristics is needed in explosion safety analysis (e.g., to calculate the drag loads on structures). Also, to predicct the amount of dust in the rising fireball of an explsion, one must know the dusty boundary layer swept up during the positive and negative phases of the blast wave and how much of this boundary layer dust is entrained into the stem of the dust cloud. This paper describes the results of numerical simulations of the dusty boundary layer created by a surface burst explosion. The evolution of the flow was calculated by a high-order Godunov code that solves the nonsteady conservation laws.
Kuhl, A.L. [Lawrence Livermore National Lab., El Segundo, CA (United States); Ferguson, R.E.; Chien, K.Y.; Collins, J.P. [Naval Surface Warfare Center, Silver Spring, MD (United States)
Oil and Gas Field Code Master List 1990
This is the ninth annual edition of the Energy Information Administration's (EIA) Oil and Gas Field Code Master List. It reflects data collected through October 1990 and provides standardized field name spellings and codes for all identified oil and/or gas fields in the United States. There are 54,963 field records in this year's Oil and Gas Field Code Master List (FCML). This amounts to 467 more than in last year's report. As it is maintained by EIA, the Master List includes: Field records for each state and county in which a field resides; field records for each offshore area block in the Gulf of Mexico in which a field resides;field records for each alias field name; fields crossing state boundaries that may be assigned different names by the respective state naming authorities.
Not Available
Exact Solution for the Stokes Problem of an Infinite Cylinder in a Fluid with Harmonic Boundary Conditions at Infinity
We present an exact solution for the time-dependent Stokes problem of an infinite cylinder of radius r=a in a fluid with harmonic boundary conditions at infinity. This is a 3-dimensional problem but, because of translational invariance along the axis of the cylinder it effectively reduces to a 2-dimensional one. The Stokes problem being a linear reduction of the full Navier-Stokes equations, we show how to satisfy the no-slip boundary condition at the cylinder surface and the harmonic boundary condition at infinity, exhibit the full velocity field for radius r>a, and discuss the nature of the solutions for the specific case of air at sea level.
Andreas N. Vollmayr; Jan-Moritz P. Franosch; J. Leo van Hemmen
0/ 177 0/ 177 Implementation Plan and Initial Development of Nuclear Concrete Materials Database for Light Water Reactor Sustainability Program September 30, 2010 Prepared by Weiju Ren and Dan Naus Oak Ridge National Laboratory Barry Oland XCEL Engineering DOCUMENT AVAILABILITY Reports produced after January 1, 1996, are generally available free via the U.S. Department of Energy (DOE) Information Bridge. Web site http://www.osti.gov/bridge Reports produced before January 1, 1996, may be purchased by members of the public from the following source. National Technical Information Service 5285 Port Royal Road Springfield, VA 22161 Telephone 703-605-6000 (1-800-553-6847) TDD 703-487-4639 Fax 703-605-6900 E-mail email@example.com
Brainstorming Outline: Combining Subgroup Deliverables
... Email, Michael Seablom, NASA Headquarters, michael.s ... new skill sets, organization structures, processes ... Namenode - Directory service for Hadoop. ...
Outline for MOU Writing Guide
... by others arising out of the terms of this ... not to exceed [insert #] days ? Process search result verifications in ... Enter cases into the UL and UL palm ...
The effect of temperature and magnetic field on a quantum rod qubit
The Hamiltonian of a quantum rod (QR) with an ellipsoidal boundary is given after a coordinate transformation, which changes the ellipsoidal boundary into a spherical one. We obtain the eigenenergies and eigenfunctions of the ground and the first excited ... Keywords: Magnetic field, Quantum rod, Qubit, Temperature effect
Yong Sun; Zhao-Hua Ding; Jing-Lin Xiao
South Dakota-Minnesota Boundary Waters Commission (Minnesota) | Department
Dakota-Minnesota Boundary Waters Commission (Minnesota) Dakota-Minnesota Boundary Waters Commission (Minnesota) South Dakota-Minnesota Boundary Waters Commission (Minnesota) < Back Eligibility Utility Fed. Government Commercial Agricultural Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Residential Installer/Contractor Rural Electric Cooperative Tribal Government Low-Income Residential Schools Retail Supplier Institutional Multi-Family Residential Systems Integrator Fuel Distributor Nonprofit General Public/Consumer Transportation Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State Minnesota Program Type Environmental Regulations This section establishes an interstate commission to set standards for
A Cartesian embedded boundary method for hyperbolic conservation laws
The authors develop an embedded boundary finite difference technique for solving the compressible two- or three-dimensional Euler equations in complex geometries on a Cartesian grid. The method is second order accurate with an explicit time step determined by the grid size away from the boundary. Slope limiters are used on the embedded boundary to avoid non-physical oscillations near shock waves. They show computed examples of supersonic flow past a cylinder and compare with results computed on a body fitted grid. Furthermore, they discuss the implementation of the method for thin geometries, and show computed examples of transonic flow past an airfoil.
Sjogreen, B; Petersson, N A
Morphotropic Phase Boundaries in Ferromagnets: Tb1 xDyxFe2 Alloys
The structure and properties of the ferromagnet Tb1 xDyxFe2 are explored through the morphotropic phase boundary (MPB) separating ferroic phases of differing symmetry. Our synchrotron data support a first order structural transition, with a broadening MPB width at higher temperatures. The optimal point for magnetomechanical applications is not centered on the MPB but lies on the rhombohedral side, where the high striction of the rhombohedral majority phase combines with the softened anisotropy of the MPB. We compare our findings with single ion crystal field theory and with ferroelectric MPBs.
Bergstrom, Richard [University of Maryland; Wuttig, Manfred [University of Maryland; Cullen, James [University of Maryland; Zavalij, Peter [University of Maryland; Dennis, Cindi [National Institute of Standards and Technology (NIST), Gaithersburg, MD; Garlea, Vasile O [ORNL; Laver, Mark [University of Maryland
Superfluid-Mott Insulator Transition of Spin-2 Cold Bosons in an Optical Lattice in a Magnetic Field
The superfluid-Mott insulator transition of spin-2 boson atoms with repulsive interaction in an optical lattice in a magnetic field is presented. By using the mean field theory, Mott ground states and phase diagrams of superfluid-Mott insulator transition at zero temperature are revealed. Applied magnetic field leads to some phase boundaries splitting. For all the initial Mott ground states containing multiple spin components, different spin components take on different phase boundaries. It is found that in this system the phase boundaries with different magnetization can be moved in different ways by only changing the intensity of the applied magnetic field.
Shuo Jin; Jing-Min Hou; Bing-Hao Xie; Li-Jun Tian; Mo-Lin Ge
Hydrodynamic slip boundary condition at chemically patterned surfaces: A continuum deduction from molecular dynamics
We investigate the slip boundary condition for single-phase flow past a chemically patterned surface. Molecular dynamics (MD) simulations show that modulation of fluid-solid interaction along a chemically patterned surface induces a lateral structure in the fluid molecular organization near the surface. Consequently, various forces and stresses in the fluid vary along the patterned surface. Given the presence of these lateral variations, a general scheme is developed to extract hydrodynamic information from MD data. With the help of this scheme, the validity of the Navier slip boundary condition is verified for the chemically patterned surface, where a local slip length can be defined. Based on the MD results, a continuum hydrodynamic model is formulated using the Navier-Stokes equation and the Navier boundary condition, with a slip length varying along the patterned surface. Steady-state velocity fields from continuum calculations are in quantitative agreement with those from MD simulations. It is shown that, when the pattern period is sufficiently small, the solid surface appears to be homogeneous, with an effective slip length that can be controlled by surface patterning. Such a tunable slip length may have important applications in nanofluidics.
Tiezheng Qian; Xiao-Ping Wang; Ping Sheng
Evolution of the lower planetary boundary layer over strongly contrasting surfaces
In a multilaboratory field study held near Boardman in northeastern Oregon in June 1991, various properties of the surface and lower atmospheric boundary layer over heavily irrigated cropland and adjacent desert steppe were investigated in the initial campaign of the Atmospheric Radiation Measurement (ARM) program. The locale was selected because its disparate characteristics over various spatial scales stress the ability of general circulation models (GCMS) to describe lower boundary conditions, particularly across the discontinuity between desert (in which turbulent flux of heat must be primarily as sensible heat) and large irrigated tracts (in which turbulent flux of latent heat should be the larger term). This campaign of ARM seeks to increase knowledge in three critical areas: (1) determination of the relationships between surface heat fluxes measured over multiple scales and the controlling surface parameters within each scale, (2) integration of local and nearly local heat flux estimates to produce estimates appropriate for GCM grid cells of 100-200 km horizontal dimension, and (3) characterization of the growth and development of the atmospheric boundary layer near transitions between surfaces with strongly contrasting moisture availabilities.
Coulter, R.L.; Gao, W.; Martin, T.J.; Shannon, J.D. [Argonne National Lab., IL (United States); Doran, J.C.; Hubbe, J.M.; Shaw, W.M. [Pacific Northwest Lab., Richland, WA (United States)
Coulter, R.L.; Gao, W.; Martin, T.J.; Shannon, J.D. (Argonne National Lab., IL (United States)); Doran, J.C.; Hubbe, J.M.; Shaw, W.M. (Pacific Northwest Lab., Richland, WA (United States))
Boundary Waters Canoe Area (Minnesota) | Department of Energy
Boundary Waters Canoe Area (Minnesota) Boundary Waters Canoe Area (Minnesota) Boundary Waters Canoe Area (Minnesota) < Back Eligibility Utility Fed. Government Commercial Agricultural Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Residential Installer/Contractor Rural Electric Cooperative Tribal Government Low-Income Residential Schools Retail Supplier Institutional Multi-Family Residential Systems Integrator Fuel Distributor Nonprofit General Public/Consumer Transportation Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State Minnesota Program Type Environmental Regulations The Boundary Waters Canoe Area occupies a large section of northern Minnesota, and is preserved as a primitive wilderness area. Construction
Convective Boundary Layers Driven by Nonstationary Surface Heat Fluxes
In this study the response of dry convective boundary layers to nonstationary surface heat fluxes is systematically investigated. This is relevant not only during sunset and sunrise but also, for example, when clouds modulate incoming solar ...
Robert van Driel; Harm J. J. Jonker
Composite Structure of Plumes in Stratus-topped Boundary Layers
Knowledge of convective plumes within the clear convective boundary layer (CBL) is quite advanced owing to direct measurements, tank experiments, and large-eddy simulation studies. As a result, modeling of the CBL is relatively successful. ...
Chin-Hoh Moeng; Ulrich Schumann
Countergradient vorticity Flux Generated in Continental Boundary Currents
It is suggested that the inshore shear of continental boundary flows like the Florida Current can be accounted for by a countergradient vorticity flux, rather than by lateral diffusion to the shore. Two simple barotropic models with cross-stream ...
Melvin E. Stern
Grain boundary dynamics in stripe phases of non potential systems
We describe numerical solutions of two non potential models of pattern formation in nonequilibrium systems to address the motion and decay of grain boundaries separating domains of stripe configurations of different orientations. We first address wavenumber selection because of the boundary, and possible decay modes when the periodicity of the stripe phases is different from the selected wavenumber for a stationary boundary. We discuss several decay modes including long wavelength undulations of the moving boundary as well as the formation of localized defects and their subsequent motion. We find three different regimes as a function of the distance to the stripe phase threshold and initial wavenumber, and then correlate these findings with domain morphology during domain coarsening in a large aspect ratio configuration.
Zhi-Feng Huang; Jorge Vinals
Measurements of Boundary Layer Profiles in an Urban Environment
Boundary layer profiles of mean temperature, velocity, and small-scale turbulence from in situ sensors, Doppler lidar, sodar, and rawinsondes are intercompared for an urban environment. A new Doppler lidar algorithm is presented to produce high-...
Rod Frehlich; Yannick Meillier; Michael L. Jensen; Ben Balsley; Robert Sharman
Coastal Boundary Layer Characteristics during Summer Stratification in Lake Ontario
Simultaneous measurements of Eulerian and Lagrangian currents along the north shore of Lake Ontario are analyzed to provide the mean flow properties and horizontal turbulent exchange characteristics in the coastal boundary layer (CBL). The summer ...
Y. R. Rao; C. R. Murthy
A �Balanced� Approach to Stable Boundary Layer Dynamics
Semiempirical arguments from Roach and Nieuwstadt concerning Richardson numbers Ri, Rf in stably stratified shear layers and boundary layers appear to bypass uncertainties of turbulence closures. Here it is shown that these arguments can be ...
S. H. Derbyshire
Gust Structure in the Neutral Surface Boundary Layer
Measured characteristics of gust amplitudes and times in the neutral surface boundary layer are presented. The probability of gust amplitudes exceeding a prescribed level is shown to decrease exponentially with amplitude, provided the amplitude ...
J. C. Doran; D. C. Powell
A Study of Tornadic Thunderstorm Interactions with Thermal Boundaries
It has been frequently observed that thunderstorms which interact with a warm front, or an old thunder-storm outflow boundary, are likely to increase in severity and become tornadic. The physical mechanisms responsible for this observed ...
Robert A. Maddox; L. Ray Hoxit; Charles F. Chappell
Analysis of Outflow Boundary Collisions in North-Central Alabama
Ninety-four outflow boundary (OB) collisions were documented in north-central Alabama over the summers of 2005�07 using the Advanced Radar for Meteorological and Operational Research (ARMOR) dual-polarimetric radar located at the Huntsville, ...
Stephen J. Harrison; John R. Mecikalski; Kevin R. Knupp
Measurements of the Marine Boundary Layer from an Airship
In 1992 and 1993, the authors made measurements of the marine boundary layer off the coast of Oregon from an airship. In 1992, these measurements consisted of coherent microwave backscatter measurements at Ku band taken from the gondola of the ...
William J. Plant; William C. Keller; Vahid Hesany; Kenneth Hayes; Karl W. Hoppel; Theodore V. Blanc
Some Turbulence Characteristics in Stable Atmospheric Boundary Layer Flow
Atmospheric boundary layer measurements during stable and near neutral condition from seven sites in different kinds of terrain have been analyzed in order to find relationships among turbulence parameters.
Ann-Sofi Smedman
Toward Convective Boundary Layer Parameterization: A Scalar Transport Module
Recent results from large-eddy simulations indicate that the eddy diffusivity for scalar diffusion through the top of a convective boundary layer is different from that for diffusion through the bottom. From this, one can show that the eddy ...
John C. Wyngaard
Boundary Layer Oscillations from Thunderstorms at Sydney Airport
Analyses of wind velocity and air pressure data, acquired by a set of low-level anemometers at Sydney Airport, Australia, indicate the passage of a set of three remarkably smooth atmospheric boundary layer oscillations that traveled ahead of a ...
Richard Manasseh; Jason H. Middleton
The Influence of Preexisting Boundaries on Supercell Evolution
A three-dimensional nonhydrostatic cloud model is used to study the evolution of supercell thunderstorms, with emphasis on the low-level mesocyclone, interacting with preexisting boundaries. The impacts of low-level environmental shear, storm ...
Nolan T. Atkins; Morris L. Weisman; Louis J. Wicker
The Surface Boundary Layer in Coastal Upwelling Regions
Observations from the Oregon, northwest Africa, Peru, and northern California shelves are used to examine the characteristics of the surface boundary layer in coastal regions during the upwelling season. The observations from these four regions ...
Steven J. Lentz
Analytical Parameterizations of Diffusion: The Convective Boundary Layer
A brief review is made of data bases which have been used for developing diffusion parameterizations for the convective boundary layer (CBL). A variety of parameterizations for lateral and vertical dispersion, ?y and ?z, are surveyed; some of ...
Gary A. Briggs
Nonlocal Treatment of the Buoyancy-Shear-Driven Boundary Layer
A successful description of a convective boundary layer requires that the model employed takes into account the nonlocal nature of turbulent convection. In this paper new third-order moments (TOMs) are presented and tested. Numerical solutions ...
E. Ferrero; N. Colonna
Observations of Vertical Wind Shear Heterogeneity in Convective Boundary Layers
Dual-Doppler wind syntheses from mobile radar observations obtained during the International H2O Project document some of the spatial variability of vertical wind profiles in convective boundary layers. Much of the variability of popular ...
Paul Markowski; Yvette Richardson
Multiscale Large Eddy States in Weakly Stratified Planetary Boundary Layers
We first discuss observations of two classes of two-dimensional large eddy states in weakly stratified atmospheric boundary layers. One class is characterized by large eddies with a single horizontal scale. The other contains multiscale large ...
Pierre D. Mourad; Robert A. Brown
Energy Dissipation and Upwelling in a Western Boundary Current
Energy dissipation in a western boundary current begins with the conversion of mean potential energy into kinetic energy of �primary� eddies. The rate of this energy conversion is taken to equal the total energy dissipation rate, in analogy with ...
G. T. Csanady
Dispersion of Small Suspended Particles in a Wave Boundary Layer
The dispersion of heavy suspensions in a wave boundary layer over a nonerodible bed is examined theoretically. Focusing attention on the horizontal variation of the ambient wave pattern, an effective convection-diffusion equation is derived by ...
Chiang C. Mei; Chimin Chian
Boundary-layer updrafts driven by airflow over heated terrain
This study presents linear and nonlinear scalings for boundary-layer ascent forced by airflow over heated terrain and compares them to results from corresponding high-resolution numerical simulations. Close agreement between theory and simulation ...
Daniel J. Kirshbaum; Chun-Chih Wang
Optimization Approach to the Treatment of Open Boundary Conditions
A solution to an optimization problem is developed that deals with minimizing a measure of difference between the values of observed and predicted variables at an open ocean boundary. Minimization is based on the change of the flux of energy ...
I. Shulman; James K. Lewis
Sensitivity of Boundary-layer and Deep Convective Cloud Simulations...
convective clouds using a cloud resolving model (CRM). A CRM usually uses a vertical grid spacing less than 100 m to simulate boundary layer clouds such as shallow cumuli and...
Elastic Strain Energy Effects on Grain Boundary Segregation and ...
Symposium, Integrated Computational Materials Engineering: Modeling and Simulation Applied to Metals Processing. Presentation Title, Elastic Strain Energy Effects on Grain Boundary ... Diffusivity and Mobility Data: Building Blocks for ICME.
Estuarine Boundary Layer Mixing Processes: Insights from Dye Experiments
A series of dye releases in the Hudson River estuary elucidated diapycnal mixing rates and temporal variability over tidal and fortnightly time scales. Dye was injected in the bottom boundary layer for each of four releases during different ...
Robert J. Chant; Wayne R. Geyer; Robert Houghton; Elias Hunter; James Lerczak
Low-Frequency Baroclinic Waves off Coastal Boundaries
The behavior of low-frequency baroclinic Rossby wave motion in the vicinity of coastal boundaries is investigated using linearized modulated wave theory in a stratified, constant-depth, equatorial ?-plane ocean. A primary objective is to obtain ...
R. Grimshaw; J. S. Allen
Pseudospectral Technique for Calculation of Atmospheric Boundary Layer Flows
A pseudospectral method and its numerical solution algorithm for application to boundary layer problems in the atmosphere are presented. The method introduces the evaluation of a polynomial function when the solution is expressed as the sum of a ...
H. N. Lee; J. K. Shi
Intermittent and Elliptical Inertial Oscillations in the Atmospheric Boundary Layer
As a convective boundary layer over land decays in the late afternoon, the atmosphere responds to the release of turbulent stresses. For many years, this response has been presumed to take the form of an inertial oscillation, a horizontal ...
Julie K. Lundquist
Pushing Boundaries on Performance & Design: the ClimateMaster...
Boundaries on Performance & Design: the ClimateMaster Trilogy 40 Q-Mode(tm) Geothermal Heat Pump August 01, 2013 The ClimateMaster Trilogy 40 Q-Mode(tm) Geothermal Heat...
Benthic Boundary-Layer Velocity Profiles: Dependence on Averaging Period
The relationship between benthic boundary-layer velocity profiles and current meter averaging time is investigated using detailed (0.61 Hz) current measurements recorded within 1 m of the bottom on the inner continental shelf. The percentage of ...
Barry M. Lesht
Dynamical Modeling of Flow in Cumulus-Filled Boundary Layers
A primitive equation planetary boundary layer (PBL) model is constructed and applied to simulate the downwind evolution of coupled dynamic, thermodynamic and cloud properties in the PBL over warmer mean. A multilayered approach is adopted to ...
Chiu-Wai Yuen
A Second-Order Bulk Boundary-Layer Model
Bulk mass-flux models represent the large eddies that are primarily responsible for the turbulent fluxes in the planetary boundary layer as convective circulations, with an associated convective mass flux. In order for such models to be useful, ...
David A. Randall; Qingqiu Shao; Chin-Hoh Moeng
Spectral Characteristics of the Convective Boundary Layer Over Uneven Terrain
The paper describes a convective boundary layer experiment conducted in April 1978 at the Boulder Atmospheric Observatory, and examines the spectral behavior of wind velocity and temperature from the Observatory's 300 m tower, from aircraft ...
J. C. Kaimal; R. A. Eversole; D. H. Lenschow; B. B. Stankov; P. H. Kahn; J. A. Businger
Drizzle in Stratiform Boundary Layer Clouds. Part II: Microphysical Aspects
This is the second of two observational papers examining drizzle in stratiform boundary layer clouds. Part I details the vertical and horizontal structure of cloud and drizzle parameters, including some bulk microphysical variables. In this paper,...
R. Wood
On Boundary Value Problems of the Ideal-Fluid Thermocline
Recent developments of ideal-fluid thermocline models are briefly reviewed. Using density coordinates, boundary value problems are formulated for the ideal-fluid thermocline with continuous stratification. Ekman pumping and surface density are ...
Rui Xin Huang
One-Month Forecast Experiments�without Anomaly Boundary Forcings
A series of one-month forecasts were carried out for eight January cases, using a particular prediction model and prescribing climatological sea-surface temperature as the boundary condition. Each forecast is a stochastic prediction that consists ...
K. Miyakoda; J. Sirutis; J. Ploshay
Radiative Cooling Effects within and above the Nocturnal Boundary Layer
For representative tropospheric profiles of water vapor, CO2 and temperature we have calculated in situ longwave radiative flux divergence for use in a simplified second-order closure model of nocturnal boundary-layer evolution. The time ...
J. R. Garratt; R. A. Brost
Nonlinear Evolution of Linearly Unstable Barotropic Boundary Currents
The nonlinear evolution of linearly unstable barotropic boundary currents, consisting of three piecewise uniform vorticity regions, was investigated using the contour dynamics method. A physical interpretation of the nonlinear behavior of the ...
Koji Shimada; Atsushi Kubokawa
Large-Eddy Simulation of the Convective Atmospheric Boundary Layer
Large-eddy simulations of a free convective atmospheric boundary layer with an overlying capping inversion are considered. Attention is given to the dependence of the results upon the various factors influencing the simulation: the subgrid model, ...
P. J. Mason
The Temporal Behavior of the Atmospheric Boundary Layer in Israel
Upper-air measurements collected for three consecutive years (1987�89) from the Israel Meteorological Service permanent sounding site, in Beit-Dagan, Israel, enabled the temporal behavior of the atmospheric boundary layer over Israel to be ...
Uri Dayan; Jacob Rodnizki
Lidar Observation of the Atmospheric Boundary Layer in Jerusalem
The temporal variation of the atmospheric boundary layer (ABL) over Jerusalem is accurately measured by means of a lidar system. The findings are explained and discussed based on the specific synoptic situation of typical summer days in the ...
Ram Hashmonay; Ariel Cohen; Uri Dayan
Evolution of Nitrogen Oxide Chemistry in the Nocturnal Boundary Layer
The nocturnal cycle of nitrogen oxides in the atmospheric boundary layer is studied by means of a one-dimensional model. The model solves the conservation equations of momentum, entropy, total water content, and of five chemical species. The ...
S. Galmarini; P. G. Duynkerke; J. Vil�-Guerau de Arellano
The Nocturnal Boundary Layer: Model Calculations Compared with Observations
The structure and evolution of the nocturnal boundary layer (NBL) is simulated using a model which includes the transfer of energy by radiation and turbulence. The radiation scheme is an accurate narrow band model which simulates the absorption ...
Stephen A. Tjemkes; Peter G. Duynkergke
Dynamics and Boundary Layer Processes in Two Asian Cyclones
An explosive and nonexplosive cyclone that developed during March 1986 along the coast of Japan are analyzed to illustrate the possible interaction of moist baroclinic dynamics, boundary layer structure and surface heat and moisture fluxes in ...
Wendell A. Nuss; Shun I. Kamikawa
Racoro Extended-Term Aircraft Observations of Boundary Layer Clouds
A first-of-a-kind, extended-term cloud aircraft campaign was conducted to obtain an in situ statistical characterization of continental boundary layer clouds needed to investigate cloud processes and refine retrieval algorithms. Coordinated by the ...
Andrew M. Vogelmann; Greg M. McFarquhar; John A. Ogren; David D. Turner; Jennifer M. Comstock; Graham Feingold; Charles N. Long; Haflidi H. Jonsson; Anthony Bucholtz; Don R. Collins; Glenn S. Diskin; Hermann Gerber; R. Paul Lawson; Roy K. Woods; Elisabeth Andrews; Hee-Jung Yang; J. Christine Chiu; Daniel Hartsock; John M. Hubbe; Chaomei Lo; Alexander Marshak; Justin W. Monroe; Sally A. McFarlane; Beat Schmid; Jason M. Tomlinson; Tami Toto
Boundary Layer Dynamics and Cross-Equatorial Hadley Circulation
The behavior of the Hadley circulation is analyzed in the context of an idealized axisymmetric atmosphere. It is argued that the cross-equatorial Hadley circulation exhibits two different regimes depending on the depth of the planetary boundary ...
Olivier Pauluis
Physical Processes within the Nocturnal Stratus-topped Boundary Layer
Within the stratus-topped boundary layer many physical processes are involved: longwave radiation cooling, entrainment, latent heating, surface heating, solar heating, drizzling, etc. How all processes combine to maintain the turbulence within ...
Chin-Hoh Moeng; Shaohua Shen; David A. Randall
Propagation of meridional circulation anomalies along western and eastern boundaries
Motivated by the adjustment of the meridional overturning circulation to localized forcing, solutions are presented from a reduced-gravity model for the propagation of waves along western and eastern boundaries. For wave periods exceeding a few ...
David P. Marshall; Helen L. Johnson
The Eastern Boundary of the Subtropical North Atlantic
A quasi-meridional hydrographic section carried out between 60� and 20�N offshore from the European and African continental slopes is analyzed in terms of water masses and zonal transports in and out of the eastern boundary. Outstanding features ...
M. Arhan; A. Colin De Verdi�re; L. M�mery
Grain-Boundary Physics in Polycrystalline Photovoltaic Materials: Preprint
This paper describes a study of the atomic structure and electronic effects of grain boundaries in polycrystalline photovoltaic materials such as Si, CdTe, CuInSe2, and CuGaSe2.
Yan, Y.; Jiang, C. S.; Wu, X. Z.; Noufi, R.; Wei, S. H.; Al-Jassim, M. M.
Federal Failures: The Ohio-Michigan Boundary Dispute.
??The Ohio-Michigan boundary dispute, that reached a climactic point in the mid 1830s, was the product of congressional neglect and oversight. Congress through the establishment� (more)
Badenhop, Stephen W.
Social and Cultural Boundaries in Pre-Modern Poland.
??Boundaries�physical, political, social, religious, and cultural�were a key feature of life in medieval and early modern Poland, and this volume focuses on the ways in� (more)
Teter, Magda
Changes in the Deep Western Boundary Current at 53�N
Southward transports in the deep western boundary current across 53�N, over 1949�99, are determined from a historical reconstruction. Long-term mean transports, for given water masses, for net southward transport (the southward component of the ...
Paul G. Myers; Nilgun Kulan
Boundary Layer Clouds and Vegetation�Atmosphere Feedbacks
An analysis of boundary layer cumulus clouds and their impact on land surface�atmosphere exchange is presented. Seasonal trends indicate that in response to increasing insolation and sensible heat flux, both the mixed-layer height (zi) and the ...
Jeffrey M. Freedman; David R. Fitzjarrald; Kathleen E. Moore; Ricardo K. Sakai
Observations of Boundary Mixing over the Continental Slope
Observations of mixing over the continental slope using a towed body reveal a great lateral extent (several kilometers) of continuously turbulent fluid within a few hundred meters of the boundary at depth 1600 m. The largest turbulent dissipation ...
J. N. Moum; D. R. Caldwell; J. D. Nash; G. D. Gunderson
A Theory of Gravity Wave Absorption by a Boundary Layer
A one-layer model of the atmospheric boundary layer (BL) is proposed to explain the nature of lee-wave attenuation and gravity wave absorption seen in numerical simulations. Two complex coefficients are defined: the compliance coefficient and the ...
Ronald B. Smith; Qingfang Jiang; James D. Doyle
Convectively Driven Mixing in the Bottom Boundary Layer
Closely spaced vertical profiles through the bottom boundary layer over a sloping continental shelf during relaxation from coastal upwelling reveal structure that is consistent with convectively driven mixing. Parcels of fluid were observed ...
J. N. Moum; A. Perlin; J. M. Klymak; M. D. Levine; T. Boyd; P. M. Kosro
An Analysis of the Klemp and Durran Radiation Boundary Condition as Applied to Dissipative Internal Waves
Numerical simulations of the oceanic (atmospheric) boundary layer are complicated by the need to specify appropriate �outflow� or �radiation� boundary conditions at the artificial lower (upper) boundary of the computational domain. If the ...
Gregory P. Chini; Sidney Leibovich
Properties and Parameterization of the Stable Boundary Layer over Moderate Topography
Numerical simulations are used to investigate the impact on the stable boundary layer of moderate topography (with hill heights in some cases comparable to the undisturbed boundary layer depth). Area-averaged properties of the resulting boundary ...
A. R. Brown; N. Wood
The Martin Boundary Of The Young-Fibonacci Lattice
In this paper we find the Martin boundary for the Young-Fibonacci lattice YF. Along with the lattice of Young diagrams, this is the most interesting example of a differential partially ordered set. The Martin boundary construction provides an explicit Poisson-type integral representation of non-negative harmonic functions on YF. The latter are in a canonical correspondence with a set of traces on Okada locally semisimple algebra.
Frederick M. Goodman; Sergei V. Kerov
Mixing materials within zone boundaries using shape overlays
Shape overlays provide a means of statically imposing a physical region containing specified material properties onto a zoned mesh. In the most general case, material interface boundaries are unrelated to mesh zone boundaries, causing zones to contain a mixture of materials, and the mesh itself is not uniform in physical space. We develop and apply an algorithm for shape overlays on nonorthogonal, nonuniform meshes in two dimensions. Examples of shape generation in a multiblock uid dynamics code are shown.
Grandy, J.
Boundary Conditions for Three-Body Scattering in Configuration Space
The asymptotic behavior of three-body scattering wave functions in configuration space is studied by considering a model equation that has the same asymptotic form as the Faddeev equations. Boundary conditions for the wave function are derived, and their validity is verified by numerical calculations. It is shown that these boundary conditions for the partial differential equation can be used to obtain accurate numerical solutions for the wave function.
G. L. Payne; W. Gloeckle; J. L. Friar
Materials Handbook for Nuclear Plant Pressure Boundary Applications (2013)
Utility engineers require accurate structural materials properties and performance data to make decisions regarding the adequacy of materials for nuclear power applications. To meet this need, the Electric Power Research Institute (EPRI) publishes the Materials Handbook for Nuclear Plant Pressure Boundary Applications, which has been updated and revised since its initial publication in 1998. The primary focus of the handbook is on pressure boundary materials such as those used for piping ...
A Hurricane Boundary Layer and Wind Field Model for Use in Engineering Applications
This article examines the radial dependence of the height of the maximum wind speed in a hurricane, which is found to lower with increasing inertial stability (which in turn depends on increasing wind speed and decreasing radius) near the ...
Peter J. Vickery; Dhiraj Wadhera; Mark D. Powell; Yingzhao Chen
Comparison of Methods for Estimating Mixing Height Used during the 1992 Atlanta Field Intensive
During the summer of 1992, measurements of the boundary layer mixing height were conducted at five locations around the city of Atlanta, Georgia, as part of the 1992 Atlanta Field Intensive of the Southern Oxidants Research Program on Ozone Non-...
Frank J. Marsik; Kenneth W. Fischer; Tracey D. McDonald; Perry J. Samson
Retrieval of Microscale Wind and Temperature Fields from Single- and Dual-Doppler Lidar Data
Dual-Doppler lidar observations are used to assess the accuracy of single-Doppler retrievals of microscale wind and temperature fields in a shear-driven convective boundary layer. The retrieval algorithm, which is based on four-dimensional ...
Rob K. Newsom; David Ligon; Ron Calhoun; Rob Heap; Edward Cregan; Marko Princevac
Intra- and inter-grain currents in coated conductors with arbitrary grain boundary properties from magnetic measurements
A generalized methodology is described for determining both the intragranular and through-grain-boundary critical current densities in practical coated conductors from contact-free magnetic hysteresis measurements. The model incorporates the vector nature of current density J within the superconducting grains and current conservation with respect to the grain boundaries. Using physically observed values for the grain aspect ratio as input, the analysis yields the low-field intragranular critical current density J{sub c}{sup G} from a single field-dependent measurement of the global J{sub c} and provides a consistent description that spans the entire range from the weak-link (J{sub c}/J{sub c}{sup G}) to the single-grain (J{sub c}/J{sub c}{sup G} {yields} 1) limit. Results are given for ex situ processed RBCO coatings on RABiTS.
Feenstra, Roeland [ORNL; Sinclair IV, John W [ORNL; Thompson, James R [ORNL; Christen, David K [ORNL
Boundary Layer Depth, Entrainment, and Decoupling in the Cloud-Capped Subtropical and Tropical Marine Boundary Layer
Estimates of marine boundary layer (MBL) depth and degree of decoupling for two regions of the subtropical and tropical east Pacific are presented using satellite observations from the Moderate Resolution Imaging Spectroradiometer (MODIS) and the ...
Robert Wood; Christopher S. Bretherton
Darboux transformation of boundary conditions of regular Dirac Sturm--Liouville problem
It is shown that boundary conditions of the Darboux transformed Dirac Sturm--Liouville problem are always zero-valued independently on boundary conditions of initial problem.
Ekaterina Pozdeeva; Alexander Tarasov
Biofuel Boundaries: Estimating the Medium-Term Supply Potential of Domestic Biofuels
Biofuel Boundaries: Estimating the Medium-Term SupplyAugust 22, 2007 Biofuel Boundaries: Estimating the Medium-significant amount of liquid biofuel (equivalent to 30-100%
Jones, Andrew; O'Hare, Michael; Farrell, Alexander
The influence of vortex pinning and grain boundary structure on critical currents across grain boundaries in YBa{sub 2}Cu{sub 3}O{sub x}.
We have used studies of single grain boundaries in YBCO thin films and bulk bicrystals to study the influence of vortex pinning along a grain boundary on dissipation. The critical current density for transport across grain boundaries in thin films is typically more than an order of magnitude larger than that measured for transport across grain boundaries in bulk samples. For low disorientation angles, the difference in critical current density within the grains that form the boundary can contribute to the substantial differences in current density measured across the boundary. However, substantial differences exist in the critical current density across boundaries in thin film compared to bulk bicrystals even in the higher angle regime in which grain boundary dissipation dominates. The differences in critical current density in this regime can be understood on the basis of vortex pinning along the boundary.
Miller, D. J.
Nocturnal Low-Level-Jet-Dominated Atmospheric Boundary Layer Observed by a Doppler Lidar Over Oklahoma City during JU2003
Boundary layer wind data observed by a Doppler lidar and sonic anemometers during the mornings of three intensive observational periods (IOP2, IOP3, and IOP7) of the Joint Urban 2003 (JU2003) field experiment are analyzed to extract the mean and turbulent characteristics of airflow over Oklahoma City, Oklahoma. A strong nocturnal low-level jet (LLJ) dominated the flow in the boundary layer over the measurement domain from midnight to the morning hours. Lidar scans through the LLJ taken after sunrise indicate that the LLJ elevation shows a gradual increase of 25-100 m over the urban area relative to that over the upstream suburban area. The mean wind speed beneath the jet over the urban area is about 10%-15% slower than that over the suburban area. Sonic anemometer observations combined with Doppler lidar observations in the urban and suburban areas are also analyzed to investigate the boundary layer turbulence production in the LLJ-dominated atmospheric boundary layer. The turbulence kinetic energy was higher over the urban domain mainly because of the shear production of building surfaces and building wakes. Direct transport of turbulent momentum flux from the LLJ to the urban street level was very small because of the relatively high elevation of the jet. However, since the LLJ dominated the mean wind in the boundary layer, the turbulence kinetic energy in the urban domain is correlated directly with the LLJ maximum speed and inversely with its height. The results indicate that the jet Richardson number is a reasonably good indicator for turbulent kinetic energy over the urban domain in the LLJ-dominated atmospheric boundary layer.
Wang, Yansen; Klipp, Cheryl L.; Garvey, Dennis M.; Ligon, David; Williamson, Chatt C.; Chang, Sam S.; Newsom, Rob K.; Calhoun, Ron
Field Mapping At Marysville Mt Area (Blackwell) | Open Energy Information
Mt Area (Blackwell) Mt Area (Blackwell) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Field Mapping At Marysville Mt Area (Blackwell) Exploration Activity Details Location Marysville Mt Area Exploration Technique Field Mapping Activity Date Usefulness useful DOE-funding Unknown Notes Geologic mapping has outlined a structure which may be a partial control on the high heat flow. The Cretaceous intrusive (outlined by the magnetic data) and the heat flow anomaly occupy a broad dome in the Precambrian rocks, the stock outcropping in the northwest portion of the dome, and the heat flow anomaly restricted to the southwest portion of the dome. References D. D. Blackwell (Unknown) Exploration In A Blind Geothermal Area Near Marysville, Montana, Usa
Grain boundary networks in high-performance, heteroepitaxial, YBCO films on polycrystalline, cube-textured metals
Grain boundaries (GBs) in high-temperature superconductors suppress the critical current density (Jc) dramatically [1-3]. The Jc drops exponentially when GB-misorientation exceeds 4 [3]. To reduce the number of high-angle GBs, fabrication of biaxially-textured, superconducting wires via epitaxial growth on cube-textured metals has been widely investigated [4-6]. Such wires have exhibited very high-Jc in applied magnetic fields despite having a majority of GBs with total misorientations greater than 4 . Here we show that GB networks in these wires have numerous GBs with out-of-plane misorientations > 4 and few boundaries having in-plane misorientations > 4 . The high performance can be explained if the Jc is determined primarily by in-plane misorientations. This supposition was confirmed by in-field transport measurements on artificially fabricated bicrystals of superconductors having only out-of-plane misorientations. Atomic resolution imaging of bicrystals with out-of-plane misorientations show that superconducting ab-planes are continuous across such GBs in contrast to GBs with in-plane misorientations.
Goyal, Amit [ORNL; Field, Dr. David [Washington State University; Held, R. [Institute of Physics, Augsburg University, Augsburg, Germany; Mannhart, J. [Institute of Physics, Augsburg University, Augsburg, Germany
A field project over the Atmospheric Radiation Measurement-Clouds and Radiation Testbed (ARM-CART) site during a period of several nights in September, 2007 was conducted to explore the evolution of the low-level jet (LLJ). Data was collected from a tower and a sodar and analyzed for turbulent behavior. To study the full range of nocturnal boundary layer (NBL) behavior, the Regional Atmospheric Modeling System (RAMS) was used to simulate the ARM-CART NBL field experiment and validated against the data collected from the site. This model was run at high resolution, and is ideal for calculating the interactions among the various motions within the boundary layer and their influence on the surface. The model reproduces adequately the synoptic situation and the formation and dissolution cycles of the low-level jet, although it suffers from insufficient cloud production and excessive nocturnal cooling. The authors suggest that observed heat flux data may further improve the realism of the simulations both in the cloud formation and in the jet characteristics. In a higher resolution simulation, the NBL experiences motion on a range of timescales as revealed by a wavelet analysis, and these are affected by the presence of the LLJ. The model can therefore be used to provide information on activity throughout the depth of the NBL.
Werth, D.; Kurzeja, R.; Parker, M.
Appendix to ISAB and ISRP Review of the Salmonid Field Protocols Handbook (ISAB&ISRP 2007-5)
Appendix to ISAB and ISRP Review of the Salmonid Field Protocols Handbook (ISAB&ISRP 2007-5) Specific Comments on Handbook Sections and Field Protocols Comments are given under the titles of the respective chapters, as outlined below. The page on which each chapter starts in the Handbook is also
Observations from the EUV Imaging Spectrometer (EIS) on board Hinode have revealed outflows and non-thermal line broadening in low intensity regions at the edges of active regions (ARs). We use data from Hinode's EIS, Solar Dynamic Observatory's Atmospheric Imaging Assembly and Helioseismic and Magnetic Imager, and the Transition Region and Coronal Explorer instrument to investigate the boundaries of arcade-like AR cores for NOAA ARs 11112, 10978, and 9077. A narrow, low intensity region that is observed at the core's periphery as a dark band shows outflows and increased spectral line broadening. This dark band is found to exist for days and appears between the bright coronal loop structures of different coronal topologies. We find a case where the dark band region is formed between the magnetic field from emerging flux and the field of the pre-existing flux. A magnetic field extrapolation indicates that this dark band is coincident with the spine lines or magnetic separatrices in the extrapolated field. This occurs over unipolar regions where the brightened coronal field is separated in connectivity and topology. This separation does not appear to be infinitesimal and an initial estimate of the minimum distance of separation is found to be Almost-Equal-To 1.5-3.5 Mm.
Scott, J. T.; Martens, P. C. H.; Tarr, L. [Department of Physics, Montana State University, Bozeman, MT 59717 (United States)
Charge Transport Anisotropy Due to Grain Boundaries in Directionally
Charge Transport Anisotropy Due to Grain Charge Transport Anisotropy Due to Grain Boundaries in Directionally Crystallized Thin Films of Regio-Regular Poly(3-hexylthiophene) Semicrystalline polymers, such as polythiophenes, hold much promise as active layers in printable electronic devices such as photovoltaic cells, sensors, and thin film transistors. As organic semiconductors approach commercialization, there is a need to better understand the relationship between charge transport and microstructure, in particular, to identify the inherent bottlenecks to charge transport. In semicrystalline and polycrystalline materials, charge transport is most likely dominated by grain-boundary effects, although the exact mechanism is not well understood. Unfortunately, grain boundaries in semicrystalline thin films are difficult to characterize: the grains are too small to allow for measurements across individual grain boundaries (as is often done for polycrystalline films of small molecules) and bulk measurements are complicated by the unknown orientation of polymer chains within the grain. To better understand the effect of chain orientation on grain boundaries, we use anisotropic thin films of poly(3-hexylthiophene) (P3HT) - one of the most well-studied polymeric semiconductors, as a tool to study charge transport.
Application of a Perturbation Recycling Method in the Large-Eddy Simulation of a Mesoscale Convective Internal Boundary Layer
An arrangement of boundary conditions is described and demonstrated that facilitates the large-eddy simulation (LES) of inhomogeneous boundary layers such as internal boundary layers. In addition to the domain where the internal boundary layer ...
Shane D. Mayor; Philippe R. Spalart; Gregory J. Tripoli
General Outline for Conducting Quality Inspections and Tests of Concrete Placement at Nuclear Facilities: Standard and Optimized for Electronic Viewing Versions
This field guide provides a field-deployable resource for utility professionals who are responsible for inspecting and testing concrete placements at nuclear facilities. It addresses development and submittal of concrete mixes, qualification and inspection of batching facilities, qualification of testing agencies and personnel, review of construction procedures, and development of inspection and testing plans. It also provides checklists for pre-placement inspection; concrete conveyance; placement ...
A Combined Local and Nonlocal Closure Model for the Atmospheric Boundary Layer. Part II: Application and Evaluation in a Mesoscale Meteorological Model
A new combined local and nonlocal closure atmospheric boundary layer model called the Asymmetric Convective Model, version 2, (ACM2) was described and tested in one-dimensional form and was compared with large-eddy simulations and field data in ...
Jonathan E. Pleim
A dual mass flux framework for boundary layer convection
A dual mass flux framework for boundary layer convection A dual mass flux framework for boundary layer convection Neggers, Roel European Centre for Medium-range Weather Forecasts (ECMWF) Category: Modeling A new convective boundary layer scheme is presented that is currently being developed for the Integrated Forecasting System (IFS) of the European Centre for Medium-range Weather Forecasts (ECMWF). Part of the total turbulent flux is modeled through advective mass flux by multiple updrafts, initialized at the surface. Two groups of updrafts are explicitly represented; i) updrafts that never reach their lifting condensation level, and ii) updrafts that condensate and become cloudy. Key new ingredient is the flexibility of the associated updraft area fractions, as a function of model state. As a result, an extra degree of freedom is introduced in the
Mineral Deformation at Earth's Core-Mantle Boundary
Mineral Deformation at Earth's Core-Mantle Boundary Print Mineral Deformation at Earth's Core-Mantle Boundary Print Earth is a dynamic planet in which convection takes place on the scale of thousands of kilometers. Because Earth is mostly solid (except for its liquid-iron outer core), this convection causes deformation of solid rocks by plastic flow. At the core-mantle boundary (CMB), 2900 km deep, seismologists have discovered that seismic waves travel faster in certain directions. This seismic anisotropy appears to be related to the deformation of the constituent minerals. To understand the deformation mechanisms of mineral phases at this depth, researchers from Yale and UC Berkeley re-created the ultrahigh pressures of the deep Earth at ALS Beamline 12.2.2 while conducting in situ x-ray diffraction experiments to probe changes in crystal orientations.
Microsoft Word - Bell-BoundaryFiber_CX_2013
Amanda Williams Amanda Williams Project Manager - TEP-TPP-3 Proposed Action: Bell-Boundary Fiber Project Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.7 - Fiber optic cable Location: Spokane and Pend Orielle counties, WA Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA is proposing to install new fiber optic line along 90 miles of existing BPA transmission lines in Spokane and Pend Orielle counties in Washington (see Figure 1). It would extend from Bell Substation in Spokane, WA to Boundary Substation 8 miles north of Metaline Falls, WA. The fiber would be strung on the Bell-Boundary No. 1 transmission line and run through Sacheen and Cusick substations along the route. BPA would install overhead fiber optic cable on existing towers or on fiber optic wood poles where
Optimal Control of a Parabolic Equation with Dynamic Boundary Condition
We investigate a control problem for the heat equation. The goal is to find an optimal heat transfer coefficient in the dynamic boundary condition such that a desired temperature distribution at the boundary is adhered. To this end we consider a function space setting in which the heat flux across the boundary is forced to be an L{sup p} function with respect to the surface measure, which in turn implies higher regularity for the time derivative of temperature. We show that the corresponding elliptic operator generates a strongly continuous semigroup of contractions and apply the concept of maximal parabolic regularity. This allows to show the existence of an optimal control and the derivation of necessary and sufficient optimality conditions.
Hoemberg, D., E-mail: firstname.lastname@example.com; Krumbiegel, K., E-mail: firstname.lastname@example.com [Weierstrass Institute for Applied Mathematics and Stochastics, Nonlinear Optimization and Inverse Problems (Germany); Rehberg, J., E-mail: email@example.com [Weierstrass Institute for Applied Mathematics and Stochastics, Partial Differential Equations (Germany)
Boundary conditions on internal three-body wave functions
For a three-body system, a quantum wave function {Psi}{sub m}{sup {ell}} with definite {ell} and m quantum numbers may be expressed in terms of an internal wave function {chi}{sub k}{sup {ell}} which is a function of three internal coordinates. This article provides necessary and sufficient constraints on {chi}{sub k}{sup {ell}} to ensure that the external wave function {Psi}{sub k}{sup {ell}} is analytic. These constraints effectively amount to boundary conditions on {chi}{sub k}{sup {ell}} and its derivatives at the boundary of the internal space. Such conditions find similarities in the (planar) two-body problem where the wave function (to lowest order) has the form r{sup |m|} at the origin. We expect the boundary conditions to prove useful for constructing singularity free three-body basis sets for the case of nonvanishing angular momentum.
Mitchell, Kevin A.; Littlejohn, Robert G.
Oil and gas field code master list 1997
The Oil and Gas Field Code Master List 1997 is the sixteenth annual listing of all identified oil and gas fields in the US. It is updated with field information collected through October 1997. The purpose of this publication is to provide unique, standardized codes for identification of domestic fields. Use of these field codes fosters consistency of field identification by government and industry. As a result of their widespread adoption they have in effect become a national standard. The use of field names and codes listed in this publication is required on survey forms and other reports regarding field-specific data collected by EIA. There are 58,366 field records in this year`s FCML, 437 more than last year. The FCML includes: field records for each State and county in which a field resides; field records for each offshore area block in the Gulf of Mexico in which a field resides; field records for each alias field name (definition of alias is listed); fields crossing State boundaries that may be assigned different names by the respective State naming authorities. This report also contains an Invalid Field Record List of 4 records that have been removed from the FCML since last year`s report. These records were found to be either technically incorrect or to represent field names which were never recognized by State naming authorities.
MLPG method for two-dimensional diffusion equation with Neumann's and non-classical boundary conditions
In this paper, a meshless local Petrov-Galerkin (MLPG) method is presented to treat parabolic partial differential equations with Neumann's and non-classical boundary conditions. A difficulty in implementing the MLPG method is imposing boundary conditions. ... Keywords: Finite differences, Heat equation, MLPG method, Neumann's boundary conditions, Non-classical integral boundary condition, Parabolic partial differential equations
S. Abbasbandy; A. Shirzadi
Gradient zone boundary control in salt gradient solar ponds
A method and apparatus for suppressing zone boundary migration in a salt gradient solar pond includes extending perforated membranes across the pond at the boundaries, between the convective and non-convective zones, the perforations being small enough in size to prevent individual turbulence disturbances from penetrating the hole, but being large enough to allow easy molecular diffusion of salt thereby preventing the formation of convective zones in the gradient layer. The total area of the perforations is a sizable fraction of the membrane area to allow sufficient salt diffusion while preventing turbulent entrainment into the gradient zone.
Hull, John R. (Downers Grove, IL)
Contaminant Boundary at the Faultless Underground Nuclear Test
The U.S. Department of Energy (DOE) and the Nevada Division of Environmental Protection (NDEP) have reached agreement on a corrective action strategy applicable to address the extent and potential impact of radionuclide contamination of groundwater at underground nuclear test locations. This strategy is described in detail in the Federal Facility Agreement and Consent Order (FFACO, 2000). As part of the corrective action strategy, the nuclear detonations that occurred underground were identified as geographically distinct corrective action units (CAUs). The strategic objective for each CAU is to estimate over a 1,000-yr time period, with uncertainty quantified, the three-dimensional extent of groundwater contamination that would be considered unsafe for domestic and municipal use. Two types of boundaries (contaminant and compliance) are discussed in the FFACO that will map the three-dimensional extent of radionuclide contamination. The contaminant boundary will identify the region wi th 95 percent certainty that contaminants do not exist above a threshold value. It will be prepared by the DOE and presented to NDEP. The compliance boundary will be produced as a result of negotiation between the DOE and NDEP, and can be coincident with, or differ from, the contaminant boundary. Two different thresholds are considered for the contaminant boundary. One is based on the enforceable National Primary Drinking Water Regulations for radionuclides, which were developed as a requirement of the Safe Drinking Water Act. The other is a risk-based threshold considering applicable lifetime excess cancer-risk-based criteria The contaminant boundary for the Faultless underground nuclear test at the Central Nevada Test Area (CNTA) is calculated using a newly developed groundwater flow and radionuclide transport model that incorporates aspects of both the original three-dimensional model (Pohlmann et al., 1999) and the two-dimensional model developed for the Faultless data decision analysis (DDA) (Pohll and Mihevc, 2000). This new model includes the uncertainty in the three-dimensional spatial distribution of lithology and hydraulic conductivity from the 1999 model as well as the uncertainty in the other flow and transport parameters from the 2000 DDA model. Additionally, the new model focuses on a much smaller region than was included in the earlier models, that is, the subsurface within the UC-1 land withdrawal area where the 1999 model predicted radionuclide transport will occur over the next 1,000 years. The purpose of this unclassified document is to present the modifications to the CNTA groundwater flow and transport model, to present the methodology used to calculate contaminant boundaries, and to present the Safe Drinking Water Act and risk-derived contaminant boundaries for the Faultless underground nuclear test CAU.
Greg Pohll; Karl Pohlmann; Jeff Daniels; Ahmed Hassan; Jenny Chapman
Boundary Analysis for H2 Production by Fermentation
Boundary Analysis for Boundary Analysis for H2 Production by Fermentation Submitted To: National Renewable Energy Laboratory by Tim Eggeman, Ph.D., P.E. Neoterics International March 12, 2004 Bioprocess * Energy * Chemicals * Polymers NEOTERICS INTERNATIONAL Using Technology to Create Business Innovation 303-358-6390 2319 S. Ellis Ct. email@example.com Lakewood, CO 80228 March 12, 2004 Margaret Mann National Renewable Energy Laboratory 1617 Cole Boulevard, MS 1613 Golden, CO 80401 Dear Maggie: Enclosed is a conceptual design and order-of-magnitude economic analysis for the production of hydrogen by fermentation of carbohydrates under the following design basis:
Improvements on open and traction boundary conditions for Navier-Stokes time-splitting methods
We present in this paper a numerical scheme for incompressible Navier-Stokes equations with open and traction boundary conditions, in the framework of pressure-correction methods. A new way to enforce this type of boundary condition is proposed and provides ... Keywords: Bifurcated tube, Fractional step methods, Navier-Stokes equations, Open boundary condition, Pressure boundary condition, Pressure-correction methods, Projection methods, Square cylinder, Traction boundary condition
A. Poux; S. Glockner; M. Aza�ez
RACORO Extended-Term Aircraft Observations of Boundary-Layer Clouds
A first-of-a-kind, extended-term cloud aircraft campaign was conducted to obtain an in-situ statistical characterization of boundary-layer clouds needed to investigate cloud processes and refine retrieval algorithms. Coordinated by the Atmospheric Radiation Measurement (ARM) Aerial Facility (AAF), the Routine AAF Clouds with Low Optical Water Depths (CLOWD) Optical Radiative Observations (RACORO) field campaign operated over the ARM Southern Great Plains (SGP) site from 22 January to 30 June 2009, collecting 260 h of data during 59 research flights. A comprehensive payload aboard the Center for Interdisciplinary Remotely-Piloted Aircraft Studies (CIRPAS) Twin Otter aircraft measured cloud microphysics, solar and thermal radiation, aerosol properties, and atmospheric state parameters. Proximity to the SGP's extensive complement of surface measurements provides ancillary data that supports modeling studies and enables evaluating a variety of surface retrieval algorithms. The five-month duration enabled sampling a range of conditions associated with the seasonal transition from winter to summer. Although about two-thirds of the cloud flights occurred in May and June, boundary-layer cloud fields were sampled under a variety of environmental and aerosol conditions, with about 75% of the flights occurring in cumulus and stratocumulus. Preliminary analyses show how these data are being used to analyze cloud-aerosol relationships, determine the aerosol sizes that are responsible for nucleating cloud drops, characterize the horizontal variability of the cloud radiative impacts, and evaluate air-borne and surface-based cloud property retrievals. We discuss how conducting an extended-term campaign requires a simplified operating paradigm that is different from that used for typical, short-term, intensive aircraft field programs.
Vogelmann, A. M.; McFarquhar, Greg; Ogren, John A.; Turner, David D.; Comstock, Jennifer M.; Feingold, G.; Long, Charles N.; Jonsson, Haf; Bucholtz, Anthony; Collins, Donald R.; Diskin, G. S.; Gerber, H.; Lawson, Paul; Woods, Roy; Andrews, Elizabeth; Yang, Hee-Jung; Chiu, Christine J.; Hartsock, Daniel; Hubbe, John M.; Lo, Chaomei; Marshak, A.; Monroe, Justin; McFarlane, Sally A.; Schmid, Beat; Tomlinson, Jason M.; Toto, Tami
We perform global unstratified three-dimensional magnetohydrodynamic simulations of an astrophysical boundary layer (BL)-an interface region between an accretion disk and a weakly magnetized accreting object such as a white dwarf-with the goal of understanding the effects of magnetic field on the BL. We use cylindrical coordinates with an isothermal equation of state and investigate a number of initial field geometries including toroidal, vertical, and vertical with zero net flux. Our initial setup consists of a Keplerian disk attached to a non-rotating star. In a previous work, we found that in hydrodynamical simulations, sound waves excited by shear in the BL were able to efficiently transport angular momentum and drive mass accretion onto the star. Here we confirm that in MHD simulations, waves serve as an efficient means of angular momentum transport in the vicinity of the BL, despite the magnetorotational instability (MRI) operating in the disk. In particular, the angular momentum current due to waves is at times larger than the angular momentum current due to MRI. Our results suggest that angular momentum transport in the BL and its vicinity is a global phenomenon occurring through dissipation of waves and shocks. This point of view is quite different from the standard picture of transport by a local anomalous turbulent viscosity. In addition to angular momentum transport, we also study magnetic field amplification within the BL. We find that the field is indeed amplified in the BL, but only by a factor of a few, and remains subthermal.
Belyaev, Mikhail A.; Rafikov, Roman R.; Stone, James M., E-mail: firstname.lastname@example.com [Department of Astrophysical Sciences, Princeton University, Ivy Lane, Princeton, NJ 08540 (United States)
Renewal series and square-root boundaries for Bessel processes
We show how a description of Brownian exponential functionals as a renewal series gives access to the law of the hitting time of a square-root boundary by a Bessel process. This extends classical results by Breiman and Shepp, concerning Brownian motion, and recovers by different means, extensions for Bessel processes, obtained independently by Delong and Yor.
Enriquez, Nathanael; Yor, Marc
Thermally Indirect Motions in the Convective Atmospheric Boundary Layer
The energetics of the dry convective boundary layer is studied by partitioning the turbulent heat flux into thermally indirect (w???thermally direct (w???>0) components as a function of z/Zi. It is found that except for the inversion ...
J. M. Wilczak; Joost A. Businger
PROVISIONAL AGENDA Forum on Modeling the Atmospheric Boundary Layer
turbulence, surface layer turbulence, surface heat and moisture representations, heterogenous sub-grid scale-0915 Coordinate System Roger Pielke, Sr., Chair (generalized vertical coordinate, horizontal spatial grid (on your own) 1400-1545 Sub-Grid Scale Fluxes Jon Mercurio, Chair (planetary boundary layer
An Unstable Elliptic Free Boundary Problem arising in Solid Combustion
An Unstable Elliptic Free Boundary Problem arising in Solid Combustion R. Monneau Ecole Nationale in solid combustion. The maximal solution and every local minimizer of the energy are regular, that is, {u combustion, singularity, unstable problem, Aleksandrov reflection, unique blow-up limit, second variation
Monneau, Régis
Coupled Motion of Interstitial-loaded Grain Boundaries in Bcc ...
... Radiation Damage Healing Mechanism under Fusion Reactor Conditions ... Atomic-Scale Modeling of the Mobility of Boundaries of Deformation Twins in Alpha-Iron ... Characterization of Reaction Layers in Mn1.5Co1.5O4 Coated Fuel Cell�...
Numerical Simulation of Boundary Layer Variables Using ??? Closure Scheme
In this study, a one-and-a-half-order ??? closure scheme is used to study the planetary boundary layer development over a full diurnal cycle using Wangara 33d-day observations as initial conditions. The simulated results are compared with a first-...
N. Ramanathan; K. Srinivasan; B. V. Seshasayee
Ceilometer Retrieval of the Boundary Layer Vertical Aerosol Extinction Structure
The CT25K ceilometer is a general-purpose cloud height sensor employing lidar technology for detection of clouds. In this paper it is shown that it can also be used to retrieve aerosol optical properties in the boundary layer. The authors present ...
K. M. Markowicz; P. J. Flatau; A. E. Kardas; J. Remiszewska; K. Stelmaszczyk; L. Woeste
Kinematic Observations of Misocyclones along Boundaries during IHOP
During the International H2O Project, mobile radars collected high-resolution data of several 0.5�2-km-wide vertically oriented vortices (or misocyclones) along at least five mesoscale airmass boundaries. This study analyzes the properties of the ...
James N. Marquis; Yvette P. Richardson; Joshua M. Wurman
Consumer sovereignty: New boundaries for telecommunications and broadband access
Antitrust and consumer protection laws share a common purpose to facilitate the exercise of effective consumer choice. This article uses this concept of consumer sovereignty to frame analysis of the shifting boundaries between the industry-specific and ... Keywords: Antitrust, Broadband, Consumer protection, Deregulation, Regulatory policy
Barbara A. Cherry
Boundary geometric control of a counter-current heat exchanger
Boundary geometric control of a counter-current heat exchanger Ahmed MAIDIa , Moussa DIAFb , Jean control of a counter-current heat exchanger whose control is designed considering a model based on two. The objective consists in controlling the internal fluid temperature, at the heat exchanger outlet
Hysteresis of a Western Boundary Current Leaping across a Gap
An idealized problem of a western boundary current of Munk thickness LM flowing across a gap in a ridge is considered using a single-layer depth-averaged approach. When the gap (of width 2a) is narrow, a 3.12LM, viscous forces alone restrict ...
Vitalii A. Sheremet
Absorption of Internal Waves by the Benthic Boundary Layer
The interaction of near-inertial velocities with the benthic boundary layer above a flat bottom is investigated using a diagnostic model and a 3-month time series of velocity from a fixed array of current meters. The observed near-inertial ...
Eric D'Asaro
Chaos and �Bursting� in the Planetary Boundary Layer
A theoretical study of the intermittent breakdowns of the planetary boundary layer (PBL) has been carried out using a one-dimensional, �flat� terrain, PBL model of the type originally developed by A.K. Blackadar. It was found that the turbulent ...
Douglas O. ReVelle
Nonhomogeneos Boundary-Value Problem for Semilinear Hyperbolic Equation. Stability
We discuss the solvability of the nonhomogeneous boundary-value problem for the semilinear equation of the vibrating string x tt (t, ... Keywords: 35L20, Primary 35L05, Secondary 58J45, Wave equations, nonconvex duality, variational method, weak solutions
Andrzej Nowakowski
Extending boundaries with meta-design and cultures of participation
Human-computer interaction (HCI) has refocused many research efforts within computer science from a technology-centered view to a human-centered view. The developments so far, however, have seen humans mostly as users and consumers rather than as active ... Keywords: boundaries, control, cultures of participation, distances, meta-design, motivation, socio-technical environments, systemic problems
Gerhard Fischer
Time Scales of the Trade Wind Boundary Layer Adjustment
The adjustment of the trade wind atmospheric boundary layer to an abrupt sea surface warming is investigated using a large-eddy simulation (LES) and two simple bulk models: a mixed-layer model (MLM), and a model based on the mixing-line hypothesis ...
Gilles Bellon; Bjorn Stevens
Dynamics of Transport under Random Fluxes on the Boundary
the anomalies as added scalar terms in the heat and transport equations. In most studies, Wiener white noise (non-homogenous Neumann) and with a stochastic term added to the boundary, viz: Wiener white: Wiener white, Wiener colored, L´evy white, and L´evy colored noise. L´evy processes form a more general
Duan, Jinqiao
Investigation of SCC Susceptibility in the Grain Boundary Controlled ...
Crack Growth Rates of Irradiated Commercial Stainless Steels in BWR and PWR ... Detailed Root Cause Analysis of SG Tube ODSCC Indications within the Tube Sheets of NPP Biblis Unit A .... Radiation Damage in Fe-C-Met Model Alloys ... Stress Corrosion Cracking Behavior near the Fusion Boundary of Dissimilar Weld
INITIAL BOUNDARY VALUE PROBLEMS FOR A QUASILINEAR PARABOLIC SYSTEM IN THREE-PHASE CAPILLARY FLOW problems for a quasi- linear parabolic system motivated by three-phase ow in porous medium in the presence quasilinear parabolic sys- tems of the form (1.1) u t + f(u) x = (B(u)u x ) x ; 0
A Vertically Averaged Circulation Model Using Boundary-Fitted Coordinates
A two-dimensional vertically averaged circulation model using boundary-fitted coordinates has been developed for predicting sea level and currants in estuarine and shelf waters. The basic idea of the approach is to use a set of coupled quasi-...
Malcolm L. Spaulding
Velocity and Stress in the Deep-Ocean Boundary Layer
In order to predict the response of deep ocean sediments to the near-bottom currents, accurate estimates of the near-bottom velocity and the boundary shear stress are necessary. Because of the unsteady nature of deep ocean currents, dynamic ...
S. R. McLean; J. Yean
Influence of Soil Moisture on Boundary Layer Cloud Development
The daytime interaction of the land surface with the atmospheric boundary layer (ABL) is studied using a coupled one-dimensional (column) land surface�ABL model. This is an extension of earlier work that focused on modeling the ABL for 31 May ...
M. B. Ek; A. A. M. Holtslag
Incoherent twin boundary migration induced by ion irradiation in Cu
Grain boundaries can act as sinks for radiation-induced point defects. The sink capability is dependent on the atomic structures and varies with the type of point defects. Using high-resolution transmission electron microscopy, we observed that {Sigma}3{l_brace}112{r_brace} incoherent twin boundary (ITB) in Cu films migrates under Cu{sup 3+} ion irradiation. Using atomistic modeling, we found that {Sigma}3{l_brace}112{r_brace} ITB has the preferred sites for adsorbing interstitials and the preferential diffusion channels along the Shockley partial dislocations. Coupling with the high mobility of grain boundary Shockley dislocations within {Sigma}3{l_brace}112{r_brace} ITB, we infer that {Sigma}3{l_brace}112{r_brace} ITB migrates through the collective glide of grain boundary Shockley dislocations, driven by a concurrent reduction in the density of radiation-induced defects, which is demonstrated by the distribution of nearby radiation-induced defects.
Li, N.; Misra, A. [Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Wang, J.; Wang, Y. Q. [Materials Science and Technology Division, MST-8, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Serruys, Y. [CEA, DEN, Service de Recherches de Metallurgie Physique, Laboratoire JANNUS, F-91191 Gif-sur-Yvette (France); Nastasi, M. [Nebraska Center for Energy Sciences Research, University of Nebraska, Lincoln, Nebraska 68588 (United States)
Generating Cosmological Gaussian Random Fields
We present a generic algorithm for generating Gaussian random initial conditions for cosmological simulations on periodic rectangular lattices. We show that imposing periodic boundary conditions on the real-space correlator and choosing initial conditions by convolving a white noise random field results in a significantly smaller error than the traditional procedure of using the power spectrum. This convolution picture produces exact correlation functions out to separations of L/2, where L is the box size, which is the maximum theoretically allowed. This method also produces tophat sphere fluctuations which are exact at radii $ R \\le L/4 $. It is equivalent to windowing the power spectrum with the simulation volume before discretizing, thus bypassing sparse sampling problems. The mean density perturbation in the volume is no longer constrained to be zero, allowing one to assemble a large simulation using a series of smaller ones. This is especially important for simulations of Lyman-$\\alpha$ systems where sma...
Pen, U L
Quark-gluon plasma in an external magnetic field
Using numerical simulations of lattice QCD we calculate the effect of an external magnetic field on the equation of state of the quark-gluon plasma. The results are obtained using a Taylor expansion of the pressure with respect to the magnetic field for the first time. The coefficients of the expansion are computed to second order in the magnetic field. Our setup for the external magnetic field avoids complications arising from toroidal boundary conditions, making a Taylor series expansion straightforward. This study is exploratory and is meant to serve as a proof of principle.
L. Levkova; C. DeTar
ARM - Field Campaign - CASES Data Analysis
govCampaignsCASES Data Analysis govCampaignsCASES Data Analysis Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Campaign : CASES Data Analysis 2004.07.01 - 2009.06.30 Lead Scientist : Margaret LeMone Description CASES Data Analysis: Potential Benefits Diurnal variation of the Atmospheric Boundary Layer. Taken together, the two Cooperative Atmosphere Surface Exchange Study (CASES) field programs, CASES-97 (morning and evening) and CASES-99 (evening, night, morning) provide a robust dataset for looking at the diurnal changes of the wind, temperature, humidity and their vertical transports near the ground and through the lowest few kilometers where surface effects are directly felt - the atmospheric boundary layer. Much of our observational knowledge
Influences on the Height of the Stable Boundary Layer as seen in Large-Eddy Simulations
Numerical weather prediction (NWP) models and atmospheric dispersion models rely on parameterizations of planetary boundary layer height. In the case of a stable boundary layer, errors in boundary layer height estimation can result in gross errors in boundary-layer evolution and in prediction of turbulent mixing within the boundary layer. We use large-eddy simulations (LES) of moderately stable boundary layers to characterize the effects of various physical processes on stable boundary layers. The stable boundary layer height is assumed to be a function of surface friction velocity, geostrophic wind, Monin-Obukhov length, and the strength of the temperature inversion atop the stable boundary layer. This temperature inversion induces gravity waves with a frequency determined by the strength of the temperature inversion.
Kosovic, B; Lundquist, J K
Nuclear Georeactor Generation of Earth's Geomagnetic Field
The purpose of this communication is to suggest that the mechanism for generating the geomagnetic field and the energy source for powering it are one and the same, a nuclear georeactor at the center of the Earth. Toward this end, I: i) Present evidence that the nuclear georeactor fission-product sub-shell is fluid; ii)Suggest that the geomagnetic field is generated within the georeactor sub-shell, rather than within Earth's iron-alloy fluid core; iii) Describe why convection appears more feasible within the georeactor sub-shell than within the iron-alloy core; iv) Disclose additional relative physical advantages for georeactor sub-shell dynamo operation; and, v) Outline briefly the research that should be conducted to advance the state of knowledge of georeactor-geomagnetic field generation. The concept of geomagnetic field production by the nuclear georeactor is presented specifically for the Earth. The concepts and principles, however, are generally applicable to planetary magnetic field production.
Herndon, J Marvin
J. Marvin Herndon
Coupled Mesoscale-Large-Eddy Modeling of Realistic Stable Boundary Layer Turbulence
Site-specific flow and turbulence information are needed for various practical applications, ranging from aerodynamic/aeroelastic modeling for wind turbine design to optical diffraction calculations. Even though highly desirable, collecting on-site meteorological measurements can be an expensive, time-consuming, and sometimes a challenging task. In this work, we propose a coupled mesoscale-large-eddy modeling framework to synthetically generate site-specific flow and turbulence data. The workhorses behind our framework are a state-of-the-art, open-source atmospheric model called the Weather Research and Forecasting (WRF) model and a tuning-free large-eddy simulation (LES) model. Using this coupled framework, we simulate a nighttime stable boundary layer (SBL) case from the well-known CASES-99 field campaign. One of the unique aspects of this work is the usage of a diverse range of observations for characterization and validation. The coupled models reproduce certain characteristics of observed low-level jets....
Wang, Yao; Manuel, Lance
Accurate Wind Characterization in Complex Terrain Using the Immersed Boundary Method
This paper describes an immersed boundary method (IBM) that facilitates the explicit resolution of complex terrain within the Weather Research and Forecasting (WRF) model. Two different interpolation methods, trilinear and inverse distance weighting, are used at the core of the IBM algorithm. Functional aspects of the algorithm's implementation and the accuracy of results are considered. Simulations of flow over a three-dimensional hill with shallow terrain slopes are preformed with both WRF's native terrain-following coordinate and with both IB methods. Comparisons of flow fields from the three simulations show excellent agreement, indicating that both IB methods produce accurate results. However, when ease of implementation is considered, inverse distance weighting is superior. Furthermore, inverse distance weighting is shown to be more adept at handling highly complex urban terrain, where the trilinear interpolation algorithm breaks down. This capability is demonstrated by using the inverse distance weighting core of the IBM to model atmospheric flow in downtown Oklahoma City.
Lundquist, K A; Chow, F K; Lundquist, J K; Kosovic, B
Boundary County, Idaho: Energy Resources | Open Energy Information
Boundary County, Idaho: Energy Resources Boundary County, Idaho: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 48.7987617°, -116.5627065° 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":48.7987617,"lon":-116.5627065,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}
Compressibility Consideration in the Boundary of a Strongly Collapsing Bubble
Equations of radial motion of a gas bubble in a compressible viscous liquid have been modified to account for compressibility at the bubble boundary. It has been done by deriving a new bubble boundary equation. This equation has a new term due to liquid compressibility. The influence of this term in the bubble dynamics has been numerically investigated using isothermal-adiabatic model for the gas bubble evolution. The results clearly indicate that at the end of the collapse the new term has very significant role and its consideration dramatically changes the bubble characteristics. The effect of this term is more prominent for the more intense collapses, so that its consideration scales up the maximum values of gas pressure and gas temperature. We have also reasoned that the new bubble behavior will be established even when the effects of mass (water vapor) exchange, chemical reactions, and gas dynamics inside the bubble are taken into account in the model.
Moshaii, A; Taeibi-Rahni, M; Moshaii, Ahmad; Sadighi-Bonabi, Rasool; Taeibi-Rahni, Mohammad
Warm Bias and Parameterization of Boundary Upwelling in Ocean Models
It has been demonstrated that Eastern Boundary Currents (EBC) are a baroclinic intensification of the interior circulation of the ocean due to the emergence of mesoscale eddies in response to the sharp buoyancy gradients driven by the wind-stress and the thermal surface forcing. The eddies accomplish the heat and salt transport necessary to insure that the subsurface flow is adiabatic, compensating for the heat and salt transport effected by the mean currents. The EBC thus generated occurs on a cross-shore scale of order 20-100 km, and thus this scale needs to be resolved in climate models in order to capture the meridional transport by the EBC. Our result indicate that changes in the near shore currents on the oceanic eastern boundaries are linked not just to local forcing, such as coastal changes in the winds, but depend on the basin-wide circulation as well.
Cessi, Paola; Wolfe, Christopher
Technoeconomic Boundary Analysis of Biological Pathways to Hydrogen Production
60-46674 60-46674 September 2009 Technoeconomic Boundary Analysis of Biological Pathways to Hydrogen Production March 27, 2008 - August 31, 2009 B.D. James, G.N. Baum, J. Perez, and K.N. Baum Directed Technologies, Inc. Arlington, Virginia National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov NREL is a national laboratory of the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Operated by the Alliance for Sustainable Energy, LLC Contract No. DE-AC36-08-GO28308 Subcontract Report NREL/SR-560-46674 September 2009 Technoeconomic Boundary Analysis of Biological Pathways to Hydrogen Production March 27, 2008 - August 31, 2009 B.D. James, G.N. Baum, J. Perez, and K.N. Baum
On the Boundary Condition Between Two Multiplying Media
DOE R&D Accomplishments (OSTI)
The transition region between two parts of a pile which have different compositions is investigated. In the case where the moderator is the same in both parts of the pile, it is found that the diffusion constant times thermal neutron density plus diffusion constant times fast neutron density satisfies the usual pile equations everywhere, right to the boundary. More complicated formulae apply in a more general case.
Friedman, F. L.; Wigner, E. P.
Original articles: Vortex states in axially symmetric superconductors in applied magnetic field
We solve analytically the linearized Ginzburg-Landau (GL) equation in the presence of an uniform magnetic field with cylindrical boundary conditions. The solution of the non-linear GL equation is provided as an expansion in the basis of linearized solutions. ... Keywords: Axial magnetic field, Mesoscopic superconductivity, Nonlinear Ginzburg-Landau equation, Vortex
Andrei Ludu; Milorad V. Milo�evi?; Francois M. Peeters
Suppressant: Electric Fields
*. Bookmark and Share. Suppressant:Electric Fields. Fire Extinguishment of Pool Flames by Means of a DC electric Field.. ...
Boundary-Spokane/Colville Valley Support Project : Environmental Assessment.
Systems studies conducted by Bonneville Power Administration indicate a need to reinforce the existing transmission system in the Colville Valley area of Washington. Analysis of several options concluded that the optimal solution for reliability and transmission loss concerns, to serve load growth, and to integrate new power generation projects was to increase transmission voltage capacity between Half Moon Substation and Boundary Substation. The Boundary-Spokane/Colville Valley Support Project is a plan to accomplish this. The project involves rebuilding an existing 91-mile single-circuit 115-kV line between Half Moon Substation and Metaline Falls to double-circuit 230-kV configuration, and adding a single-circuit 230-kV line between Metaline Falls and Boundary Substation, a distance of 9 miles. A route option and a tower design option are being evaluated for selected sections of the proposed route. The proposed action, including route and tower design options, is evaluated in this document. This evaluation includes assessments of the level of environmental impacts and impact ratings, and a comparison of options. In addition, the advantages and disadvantages of the delay/no-action and conservation alternatives are evaluated and compared to the consequences of the proposed action. Alternatives to the proposed action are described. 6 figs., 10 tabs.
United States. Bonneville Power Administration.
Internal split field generator
A generator includes a coil of conductive material. A stationary magnetic field source applies a stationary magnetic field to the coil. An internal magnetic field source is disposed within a cavity of the coil to apply a moving magnetic field to the coil. The stationary magnetic field interacts with the moving magnetic field to generate an electrical energy in the coil.
Thundat; ,Thomas George (Knoxville, TN); Van Neste, Charles W. (Kingston, TN); Vass, Arpad Alexander (Oak Ridge, TN)
The percolation behavior of grain boundary networks is characterized in two- and three-dimensional lattices with circular macroscale cross-sections that correspond to nuclear fuel elements. The percolation of gas bubbles on grain boundaries, and the subsequent percolation of grain boundary networks is the primary mechanism of fission gas release from nuclear fuels. Both radial cracks and radial gradients in grain boundary property distributions are correlated with the fraction of grain boundaries vented to the free surfaces. Our results show that cracks surprisingly do not significantly increase the percolation of uniform grain boundary networks. However, for networks with radial gradients in boundary properties, the cracks can considerably raise the vented grain boundary content.
Paul C. Millett
Diffusive-to-ballistic transition in grain boundary motion studied by atomistic simulations
An adapted simulation method is used to systematically study grain boundary motion at velocities and driving forces across more than five orders of magnitude. This analysis reveals that grain boundary migration can occur ...
Boundary Layer under Near-Inertial Internal Waves over a Critically Sloping Bottom
Internal waves reflecting off sloping bottoms have been shown to have boundary-layer scales proportional to ?� (? is viscosity). As the characteristic slope of the wave approaches the slope of the bottom, the boundary-layer scale increases ...
R. Lee Gordon
Conserved Variable Analysis of the Convective Boundary Layer Thermodynamic Structure over the Tropical Oceans
An analysis of FGGE dropwindsonde data using conserved thermodynamic variables shows mixing line structures for the convective boundary layer over the equatorial Pacific. Deeper boundary layers show a double structure. Reversals of the gradients ...
Alan K. Betts; Bruce A. Albrecht
An Equatorial Diffusive Boundary Layer and the Equatorial Stacked Jets in Thermally Driven OGCMs
New equatorial boundary layer solutions are found in a reduced-gravity model with large horizontal diffusivity. Analytical and semianalytical solutions are obtained and the structure of the boundary layer is discussed. The equatorial �stacked ...
Ryo Furue
A cartesian grid embedded boundary method for the heat equation and poisson's equation in three dimensions
A Cartesian grid embedded boundary method for the heatA Cartesian Grid Embedded Boundary Method for the HeatError Grid Size Fig. 17. Solution error for heat equation on
Schwartz, Peter; Barad, Michael; Colella, Phillip; Ligocki, Terry
A Parameter Study of Interactions Between Convective Clouds, the Convective Boundary Layer, and a Forested Surface
A numerical model was developed which included cloud parameterizations, a convective boundary layer, solar and longwave radiation, a soil layer and a parameterized forest layer. The model simulated the growth of the convective boundary layer and ...
Alfred J. Garrett
Potential Vorticity Dynamics of Boundary Currents in a Quasi-geostrophic Ocean
Boundary layer potential vorticity dynamics for a quasi-geostrophic, eddy-resolving general circulation ocean model are studied using both Lagrangian and Eulerian analyses. Active western boundary layers are found not only in the upper wind-...
M. Susan Lozier; Stephen C. Riser
Turbulent Fluxes in the Hurricane Boundary Layer. Part II: Latent Heat Flux
As part of the recent ONR-sponsored Coupled Boundary Layer Air�Sea Transfer (CBLAST) Departmental Research Initiative, an aircraft was instrumented to carry out direct turbulent flux measurements in the high wind boundary layer of a hurricane. ...
William M. Drennan; Jun A. Zhang; Jeffrey R. French; Cyril McCormick; Peter G. Black
Marine Downscaling of a Future Climate Scenario for Australian Boundary Currents
Ocean boundary currents are poorly represented in existing coupled climate models, partly because of their insufficient resolution to resolve narrow jets. Therefore, there is limited confidence in the simulated response of boundary currents to ...
Chaojiao Sun; Ming Feng; Richard J. Matear; Matthew A. Chamberlain; Peter Craig; Ken R. Ridgway; Andreas Schiller
Circulation and Transport in the Western Boundary Currents at Cape Farewell, Greenland
The circulation and volume transports in the western boundary currents around Cape Farewell, Greenland, are derived from full-depth hydrographic and velocity measurements from August�September 2005. The western boundary currents from surface to ...
N. P. Holliday; S. Bacon; J. Allen; E. L. McDonagh
Quasi-Steady Symmetric Regimes of a Rotating Annulus Differentially Heated on the Horizontal Boundaries
The symmetric flows in a rotating annulus with its horizontal boundaries maintained at temperatures as linear functions of radial distance r and with its vertical boundaries thermally insulated are studied analytically and numerically for ...
Charles Quon
The Structure of Turbulence in the Near-neutral Atmospheric Boundary Layer
In this paper, the idea of local similarity, previously used to study turbulence in the stably stratified boundary layer, is used to investigate the structure of turbulence in the neutral atmospheric boundary layer and to relate this structure to ...
A. L. M. Grant
Boundary-Layer Transition across a Stratocumulus Cloud Edge in a Coastal Zone
We examine the lateral transition from a stratocumulus-covered boundary layer to a clear-sky convective boundary layer during onshore flow in a coastal environment, using both mobile sodar observations and a numerical model. During four ...
C. E. Skupniewicz; J. W. Glendening; R. F. Kamada
Determining the Strength of the Deep Western Boundary Current Using the Chlorofluoromethane Ratio
The dilution of a passive tracer during deep water formation and the subsequent advection/mixing in a deep boundary current is modeled with application to chlorofluoromethanes (CFMs) in the North Atlantic. Two different types of boundary currents ...
Robert S. Pickart; Nelson G. Hogg; William M. Smethie Jr.
Aircraft Observations of Boundary Layer Rolls off the Coast of California
Large-scale horizontal rolls can have a significant influence on turbulent transport across the atmospheric boundary layer. The formation and maintenance of such rolls is dependent on the thermal and dynamic stability of the boundary layer (BL). ...
Ian M. Brooks; David P. Rogers
On the Mellor�Yamada Turbulence Closure Scheme: The Surface Boundary Condition for q2
A numerical model that uses a level-2� turbulence closure scheme is used to compare two boundary conditions for the turbulent energy at the air�sea interface. One boundary condition, the most commonly used, sets the turbulent kinetic energy ...
Michael W. Stacey; Stephen Pond
Boundary conditions, effective action, and Virasoro algebra for AdS?
We construct an effective action of General Relativity for small excitations from asymptotic transformations and use it to study conformal symmetry in the boundary of AdS3. By requiring finiteness of the boundary effective ...
Porfyriadis, Achilleas P