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Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Optimization and learning for rough terrain legged locomotion  

Science Conference Proceedings (OSTI)

We present a novel approach to legged locomotion over rough terrain that is thoroughly rooted in optimization. This approach relies on a hierarchy of fast, anytime algorithms to plan a set of footholds, along with the dynamic body motions required ... Keywords: Legged robots, adaptive control, mobile robotics, motion control, nonholonomic motion planning

Matt Zucker; Nathan Ratliff; Martin Stolle; Joel Chestnutt; J Andrew Bagnell; Christopher G Atkeson; James Kuffner

2011-02-01T23:59:59.000Z

2

Hazard avoidance for high-speed rough-terrain unmanned ground vehicles  

E-Print Network (OSTI)

High-speed unmanned ground vehicles have important applications in rough-terrain. In these applications unexpected and dangerous situations can occur that require rapid hazard avoidance maneuvers. At high speeds, there is ...

Spenko, Matthew J. (Matthew Julius), 1976-

2005-01-01T23:59:59.000Z

3

Derivation of Effective Aerodynamic Surface Roughness in Urban Areas from Airborne Lidar Terrain Data  

Science Conference Proceedings (OSTI)

An automated technique was developed that uses only airborne lidar terrain data to derive the necessary parameters for calculation of effective aerodynamic surface roughness in urban areas. The technique provides parameters for geometric models ...

Donald E. Holland; Judith A. Berglund; Joseph P. Spruce; Rodney D. McKellip

2008-10-01T23:59:59.000Z

4

Rough Terrain Autonomous Mobility—Part 2: An Active Vision, Predictive Control Approach  

Science Conference Proceedings (OSTI)

Off-road autonomous navigation is one of the most difficult automation challenges from the point of view of constraints on mobility, speed of motion, lack of environmental structure, density of hazards, and typical lack of prior information. ... Keywords: autonomous vehicles, goal-seeking, mobile robots, obstacle avoidance, requirements analysis, rough terrain mobility, terrain mapping, trajectory generation

Alonzo Kelly; Anthony Stentz

1998-05-01T23:59:59.000Z

5

Urbanizing terrains  

E-Print Network (OSTI)

Urban "sprawl"in the East Attica area of Athens has dramatically changed the former rural economy in a manner consistent with the urbanizing terrain's underlying properties: agricultural subdivisions, existing centres, ...

Romanos, Christoforos

2008-01-01T23:59:59.000Z

6

Representing Drag on Unresolved Terrain as a Distributed Momentum Sink  

Science Conference Proceedings (OSTI)

In numerical weather prediction models, drag on unresolved terrain is usually represented by augmenting the boundary drag on the model atmosphere, in terms of an effective surface roughness length. But as is shown here, if a terrain-following ...

John D. Wilson

2002-05-01T23:59:59.000Z

7

Real-Time streaming and rendering of terrains  

Science Conference Proceedings (OSTI)

Terrains and other geometric models have been traditionally stored locally. Their remote access presents the characteristics that are a combination of file serving and realtime streaming like audio-visual media. This paper presents a terrain streaming ...

Soumyajit Deb; Shiben Bhattacharjee; Suryakant Patidar; P. J. Narayanan

2006-12-01T23:59:59.000Z

8

Rough sets  

Science Conference Proceedings (OSTI)

Rough set theory, introduced by Zdzislaw Pawlak in the early 1980s [11, 12], is a new mathematical tool to deal with vagueness and uncertainty. This approach seems to be of fundamental importance to artificial intelligence (AI) and cognitive sciences, ...

Zdzislaw Pawlak; Jerzy Grzymala-Busse; Roman Slowinski; Wojciech Ziarko

1995-11-01T23:59:59.000Z

9

Minimalistic Control of a Compass Gait Robot in Rough Terrain  

E-Print Network (OSTI)

Although there has been an increasing interest in dynamic bipedal locomotion for significant improvement of energy efficiency and dexterity of mobile robots in the real world, their locomotion capabilities are still mostly ...

Iida, Fumiya

10

Slope preserving lossy terrain compression  

Science Conference Proceedings (OSTI)

Accurate terrain representation with appropriate preservation of important terrain characteristics, especially slope steepness, is becoming more crucial and fundamental as the geographical models are becoming more complex. Based on our earlier success ... Keywords: GIS, PDE solver, terrain elevation data set compression, terrain modeling

Zhongyi Xie; W. Randolph Franklin; Daniel M. Tracy

2010-11-01T23:59:59.000Z

11

A Novel Five Wheeled Rover for All Terrain Navigation  

Science Conference Proceedings (OSTI)

This paper presents a new concept for rough terrain navigation of rovers. The proposed design has reduced number of joints and links from existing suspension concepts. The suspension mechanism is derived from planar four bar mechanism and hence we present ... Keywords: Four bar mechanism, linear programming and dynamics, singularity

Arun Kumar Singh; Arun H. Patil; Anup Kumar Saha

2009-12-01T23:59:59.000Z

12

Empirical-Statistical Method to Estimate the Surface Wind Speed over Complex Terrain  

Science Conference Proceedings (OSTI)

An empirical-statistical method to estimate surface wind speed over complex terrain under strong wind condition is proposed. This method is based on the postulation that the surface wind speed depends on a surface roughness parameter and a ...

Hiromi Yamazawa; Junsei Kondo

1989-09-01T23:59:59.000Z

13

A System for the Hourly Assimilation of Surface Observations in Mountainous and Flat Terrain  

Science Conference Proceedings (OSTI)

An assimilation system is presented that was designed to provide timely, detailed, and coherent analyses of surface data, even when the data are collected in rough terrain where station elevations differ widely and observations are often subject ...

Patricia A. Miller; Stanley G. Benjamin

1992-10-01T23:59:59.000Z

14

Fuzzy rough signatures  

Science Conference Proceedings (OSTI)

We extend the idea of Fuzzy Signature to Fuzzy Rough Signature (FRS). The proposed Fuzzy Rough Signature is capable of handling most kind of uncertainty: epistemic and random uncertainty, vagueness due to indiscernibility, and linguistic vagueness that ... Keywords: aggregation operators, fuzzy probability, fuzzy signatures, generalized weighted relevance aggregation operator (WRAO), mathematical theory of evidence, polymorphic fuzzy signatures (PFS), possibility, probability, probability of fuzzy events, rough fuzzy signatures, rough sets

B. S. U. Mendis; L. T. Kóczy

2009-08-01T23:59:59.000Z

15

ORIGINAL PAPER Rough convex cones and rough convex fuzzy cones  

E-Print Network (OSTI)

Abstract Based on the equivalence relation on a linear space, in this paper we introduce the definition of rough convex cones and rough convex fuzzy cones and discuss some of the fundamental properties of such rough convex cones.

Zuhua Liao; Juan Zhou

2012-01-01T23:59:59.000Z

16

Rough Ride Test Procedure  

NLE Websites -- All DOE Office Websites (Extended Search)

NTP005 NTP005 Revision 2 Effective December 1, 2004 Electric Vehicle Rough Road Course Test Prepared by Electric Transportation Applications Prepared by: _______________________________ Date:__________ Ryan Harkins Approved by: _________________________________________________ Date: _______________ Donald B. Karner ©2004 Electric Transportation Applications All Rights Reserved Procedure ETA-NTP005 Revision 2 2 TABLE OF CONTENTS 1.0 Objectives 3 2.0 Purpose 3 3.0 Documentation 3 4.0 Initial Conditions and Prerequisites 4 5.0 Testing Activity Requirements 6 6.0 Glossary 12 7.0 References 14 Appendices Appendix A - Electric Vehicle Rough Road Test Data Sheet 15

17

Improved visibility computation on massive grid terrains  

Science Conference Proceedings (OSTI)

This paper describes the design and engineering of algorithms for computing visibility maps on massive grid terrains. Given a terrain T, specified by the elevations of points in a regular grid, and given a viewpoint v, the visibility ...

Jeremy Fishman; Herman Haverkort; Laura Toma

2009-11-01T23:59:59.000Z

18

Granular Rough Theory: A representation semantics oriented theory of roughness  

Science Conference Proceedings (OSTI)

The present work is an archival paper for a series of contributions proposed in last few years on building a theory of roughness over pure mereological relations among information granules. There are five major efforts taken in the present paper: (1) ... Keywords: Granular Representation Calculus, Granular Rough Theory, Granular-Rough Computational Web Intelligence

Bo Chen; Ming Sun; Mingtian Zhou

2009-03-01T23:59:59.000Z

19

Rough and Ready Biomass Facility | Open Energy Information  

Open Energy Info (EERE)

and Ready Biomass Facility and Ready Biomass Facility Jump to: navigation, search Name Rough and Ready Biomass Facility Facility Rough and Ready Sector Biomass Owner Rough and Ready Lumber Co. Location Cave Junction, Oregon Coordinates 42.1628912°, -123.6481235° 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":42.1628912,"lon":-123.6481235,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

20

Significant Decrease of Uncertainties in Sensible Heat Flux Simulation Using Temporally Variable Aerodynamic Roughness in Two Typical Forest Ecosystems of China  

Science Conference Proceedings (OSTI)

Aerodynamic roughness length zom is an important parameter for reliably simulating surface fluxes. It varies with wind speed, atmospheric stratification, terrain, and other factors. However, it is usually considered a constant. It is known that ...

Yanlian Zhou; Weimin Ju; Xiaomin Sun; Xuefa Wen; Dexin Guan

2012-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

An analysis of terrain roughness: Generating a GIS application for prescribed burning.  

E-Print Network (OSTI)

??Prescribed burning is a technique used to rejuvenate pastures by enhancing wildlife habitat, brush control, and removing old growth. The technique has become a science… (more)

Crawford, Matthew Allan

2008-01-01T23:59:59.000Z

22

ACCESS CONTROL  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

TERMSDEFINITIONS FROM DOE M 470.4-7 ACCESS CONTROL. The process of permitting access or denying access to information, facilities, nuclear materials, resources, or designated...

23

Turbulent Kinetic Energy Budgets over Mountainous Terrain  

Science Conference Proceedings (OSTI)

The objective of this study is to describe the characteristics of the airflow and turbulence structure over mountainous terrain. Turbulent characteristics of the airflow were measured using well-instrumented aircraft. The shear, buoyancy, ...

Theodore S. Karacostas; John D. Marwitz

1980-02-01T23:59:59.000Z

24

On Thermally Forced Circulations over Heated Terrain  

Science Conference Proceedings (OSTI)

A combination of analytical and numerical models is used to gain insight into the dynamics of thermally forced circulations over diurnally heated terrain. Solutions are obtained for two-layer flows (representing the boundary layer and the ...

Daniel J. Kirshbaum

2013-06-01T23:59:59.000Z

25

The Terrain-Induced Rotor Experiment  

Science Conference Proceedings (OSTI)

The Terrain-Induced Rotor Experiment (T-REX) is a coordinated international project, composed of an observational field campaign and a research program, focused on the investigation of atmospheric rotors and closely related phenomena in complex ...

Vanda Grubiši?; James D. Doyle; Joachim Kuettner; Richard Dirks; Stephen A. Cohn; Laura L. Pan; Stephen Mobbs; Ronald B. Smith; C. David Whiteman; Stanley Czyzyk; Simon Vosper; Martin Weissmann; Samuel Haimov; Stephan F. J. De Wekker; Fotini Katopodes Chow

2008-10-01T23:59:59.000Z

26

Wind and Diffusion Modeling for Complex Terrain  

Science Conference Proceedings (OSTI)

Atmospheric transport and dispersion over complex terrain were investigated. Meteorological and sulfur hexafluoride (SF6) concentration data were collected and used to evaluate the performance of a transport and diffusion model coupled with a ...

Robert M. Cox; John Sontowski; Richard N. Fry Jr.; Catherine M. Dougherty; Thomas J. Smith

1998-10-01T23:59:59.000Z

27

Daytime heat transfer processes over mountainous terrain  

Science Conference Proceedings (OSTI)

The daytime heat transfer mechanisms over mountainous terrain are investigated by means of large-eddy simulations over idealized valleys. Two- and three-dimensional topographies, corresponding to infinite and finite valleys, are used in order to ...

Juerg Schmidli

28

Dispersion into Severe Coastal Complex Terrain  

Science Conference Proceedings (OSTI)

A field study of dispersion using tracer gases from offshore sources into severe coastal complex terrain was conducted in central California. Data were collected on dispersion, surface concentrations trajectories, and stability. An examination of ...

Timothy C. Spangler; James W. Keating

1990-01-01T23:59:59.000Z

29

The Lidars in Flat Terrain (LIFT) Experiment  

Science Conference Proceedings (OSTI)

The authors describe and present early results from the July_August 1996 Lidars in Flat Terrain (LIFT) experiment. LIFT was a boundary layer experiment that made use of recently developed Doppler, aerosol backscatter, and ozone lidars, along with ...

Stephen A. Cohn; Shane D. Mayor; Christian J. Grund; Tammy M. Weckwerth; Christoph Senff

1998-07-01T23:59:59.000Z

30

Scientific Access  

NLE Websites -- All DOE Office Websites (Extended Search)

Scientific Access The APS is a open user facility that makes beam time available to the international scientific community through a peer-reviewed proposal process. Two access...

31

Open Access  

NLE Websites -- All DOE Office Websites (Extended Search)

Communication » Communication » Open Access Open Access Open access (OA) is the practice of providing unrestricted access via the Internet to peer-reviewed scholarly journal articles. Learn more below... Questions? Open Access Email Open access publishing and publications have experienced substantial growth, expansion and uptake in recent years. What exactly is an open access publication? There are many definitions, but in a nutshell an open access publication is a publication that provides immediately free online access to all users worldwide. This may sound like a tall order, and yet there are to date over 4000 journal publications that fit this definition. The need for this type of access has been driven by the out-of-control costs for scholarly publications. Statistics kept by the Association for Research Libraries

32

Instability Analysis of Terrain-Induced Canopy Flows  

Science Conference Proceedings (OSTI)

Tall vegetation and complex terrain create difficult conditions for measuring and modeling net ecosystem–atmosphere exchanges of carbon, water vapor, and pollutants. The instability of canopy flow regimes over complex terrain is critical for ...

Chuixiang Yi

2009-07-01T23:59:59.000Z

33

Open Access  

E-Print Network (OSTI)

© 2007 Brewer; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License

Earl J Brewer; Earl J Brewer

2007-01-01T23:59:59.000Z

34

Vibration-based terrain classification for electric powered wheelchairs  

Science Conference Proceedings (OSTI)

Automated terrain classification for electric powered wheelchairs (EPWs) has two primary motivations. First, certain terrains (e.g., sand and gravel) make wheelchair mobility more difficult. To alleviate this problem the wheelchair control system can ... Keywords: advanced wheelchair systems, electric powered wheelchairs, terrain classification, vibrations

Eric Coyle; Emmanuel G. Collins, Jr.; Edmond DuPont; Dan Ding; Hongwu Wang; Rory A. Cooper; Garrett Grindle

2008-04-01T23:59:59.000Z

35

Real-time tessellation of terrain on graphics hardware  

Science Conference Proceedings (OSTI)

Synthetic terrain is a key element in many applications, which can lessen the sense of realism if it is not handled correctly. We propose a new technique for visualizing terrain surfaces by tessellating them on the GPU. The presented algorithm introduces ... Keywords: GPU, Level of detail, Real-time rendering, Terrain simulation, Tessellation

Oscar Ripolles; Francisco Ramos; Anna Puig-Centelles; Miguel Chover

2012-04-01T23:59:59.000Z

36

ACCESS CONTROL  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

TERMS/DEFINITIONS FROM DOE M 470.4-7 TERMS/DEFINITIONS FROM DOE M 470.4-7 ACCESS CONTROL. The process of permitting access or denying access to information, facilities, nuclear materials, resources, or designated security areas. ACCESS CONTROL MEASURES. Hardware and software features, physical controls, operating procedures, administrative procedures, and various combinations of these designed to detect or prevent unauthorized access to classified information; special nuclear materials; Government property; automated information systems, facilities, or materials; or areas containing the above and to enforce use of these measures to protect Departmental security and property interests. CRITICAL PATH SCENARIO. An adversary-based scenario that is generated during the conduct of a vulnerability assessment and accounts for adversary tactics that

37

Factorization methods for photonics and rough surfaces.  

E-Print Network (OSTI)

??This thesis investigates non-destructive testing problems for rough and periodic surfaces, where the task is to determine such structures from scattered waves. Such problems are… (more)

Lechleiter, Armin

2008-01-01T23:59:59.000Z

38

Electric Utility Terrain Vehicle Demonstration in a Military Base Application  

Science Conference Proceedings (OSTI)

Utility terrain vehicles (UTVs), also called all terrain vehicles (ATVs), are used for a variety of purposes ranging from transporting people and materials to recreation. Examples of uses include transportation at military bases, for beach patrols, at ports, agricultural locations, industrial sites, and local/municipal applications such as at parks and schools. As of August 30, 2012 the Federal Highway Administration estimated that annual fuel usage of All-terrain vehicles to be approximately 173 ...

2013-07-24T23:59:59.000Z

39

Alteration of Terrain Permits (New Hampshire) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Alteration of Terrain Permits (New Hampshire) Alteration of Terrain Permits (New Hampshire) Alteration of Terrain Permits (New Hampshire) < Back Eligibility Agricultural Commercial Construction Fed. Government Fuel Distributor General Public/Consumer Industrial Installer/Contractor Institutional Investor-Owned Utility Local Government Low-Income Residential Multi-Family Residential Municipal/Public Utility Nonprofit Residential Retail Supplier Rural Electric Cooperative Schools State/Provincial Govt Systems Integrator Transportation Tribal Government Utility Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State New Hampshire Program Type Siting and Permitting Provider NH Department of Environmental Services Alteration of Terrain Bureau

40

Numerical Schemes for Rough Parabolic Equations  

SciTech Connect

This paper is devoted to the study of numerical approximation schemes for a class of parabolic equations on (0,1) perturbed by a non-linear rough signal. It is the continuation of Deya (Electron. J. Probab. 16:1489-1518, 2011) and Deya et al. (Probab. Theory Relat. Fields, to appear), where the existence and uniqueness of a solution has been established. The approach combines rough paths methods with standard considerations on discretizing stochastic PDEs. The results apply to a geometric 2-rough path, which covers the case of the multidimensional fractional Brownian motion with Hurst index H>1/3.

Deya, Aurelien, E-mail: deya@iecn.u-nancy.fr [Universite de Nancy 1, Institut Elie Cartan Nancy (France)

2012-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Zigbee-based Internet of Things in 3D Terrains  

Science Conference Proceedings (OSTI)

This paper focuses on the Zigbee-based Internet of Things (IoTs) in 3D terrains. A novel simulation model for IoT is proposed. The effects of various terrains, node's mobility and traffic loads are investigated in this study. Many comprehensive studies ...

Mu-Sheng Lin, Jenq-Shiou Leu, Kuen-Han Li, Jean-Lien C. Wu

2013-08-01T23:59:59.000Z

42

Multiple-Scale Terrain Forcing of Local Wind Fields  

Science Conference Proceedings (OSTI)

Observations and numerical simulations with a hydrostatic model are used to examine effects of regional and local terrain, synoptic forcing, and stability on the wind fields of an intermountain basin. The study area is centered on the Hanford ...

J. C. Doran; E. D. Skyllingstad

1992-05-01T23:59:59.000Z

43

An Observational and Prognostic Numerical Investigation of Complex Terrain Dispersion  

Science Conference Proceedings (OSTI)

The Atmospheric Studies in Complex Terrain Program conducted a field experiment at the interface of the Rocky Mountains and the Great Plains in the winter of 1991. Extensive meteorological observations were taken in northeastern Colorado near ...

Gregory S. Poulos; James E. Bossert

1995-03-01T23:59:59.000Z

44

Boundary-layer updrafts driven by airflow over heated terrain  

Science Conference Proceedings (OSTI)

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

45

On the Computation of Gradients from Observations over Complex Terrain  

Science Conference Proceedings (OSTI)

A mathematical scheme is developed to compute the gradients of observations taken over complex terrain. The method is applied to an artificial example to demonstrate the scheme. An application is made to surface pressure observations between ...

Fred J. Kopp; Paul L. Smith; Harold D. Orville

2001-10-01T23:59:59.000Z

46

Flow over Heated Terrain. Part II: Generation of Convective Precipitation  

Science Conference Proceedings (OSTI)

Previous studies have shown that thunderstorms in the Rocky Mountain region have preferred areas in which to form. There has been some indication that these areas depend on the midtropospheric wind direction. A nonhydrostatic model with a terrain-...

Donna F. Tucker; N. Andrew Crook

2005-09-01T23:59:59.000Z

47

Evaluation of an Air Pollution Analysis System for Complex Terrain  

Science Conference Proceedings (OSTI)

This paper describes results from a study to evaluate components of an operational air quality modeling system for complex terrain. In particular, the Cinder Cone Butte (CCB) “modeler's dataset” is used to evaluate the current technique for ...

D. G. Ross; D. G. Fox

1991-07-01T23:59:59.000Z

48

Implication of Spatial Averaging in Complex-Terrain Wind Studies  

Science Conference Proceedings (OSTI)

Studies of wind over complex terrain have been conducted at three times and two locations in Northern California. Instrumentation included conventional cup-vane anemometers and optical anemometers with spatial averaging over path lengths of 0.6-1 ...

W. M. Porch

1982-09-01T23:59:59.000Z

49

Variability of Surface Air Temperature over Gently Sloped Terrain  

Science Conference Proceedings (OSTI)

Temperature and wind data from a rural micronet and nearby site of the Oklahoma Mesonet are analyzed to study the frequency, strength, and formation processes of cold-pool events in a region with gentle terrain. Spatial analyses were performed ...

David Bodine; Petra M. Klein; Sean C. Arms; Alan Shapiro

2009-06-01T23:59:59.000Z

50

Terrain database interoperability issues in training with distributed interactive simulation  

Science Conference Proceedings (OSTI)

In Distributed Interactive Simulation (DIS), each participating node is responsible for maintaining its own model of the synthetic environment. Problems may arise if significant inconsistencies are allowed to exist between these separate world views, ... Keywords: distributed interactive simulation, terrain databases

Guy A. Schiavone; S. Sureshchandran; Kenneth C. Hardis

1997-07-01T23:59:59.000Z

51

On Computing the Surface Horizontal Pressure Gradient over Elevated Terrain  

Science Conference Proceedings (OSTI)

Methods are proposed for calculating the surface horizontal pressure gradient or geostrophic wind in a local area over elevated terrain from randomly spaced surface observations. These procedures avoid many of the problems associated with sea-...

Maurice Danard

1989-06-01T23:59:59.000Z

52

Computing Hydrostatic Potential Vorticity in Terrain-Following Coordinates  

Science Conference Proceedings (OSTI)

The hydrostatic potential vorticity (HPV) formulated in terrain-following coordinates is reviewed and shown to be equivalent to the widely used HPV formulations in the height, pressure, and isentropic coordinates in the sense that they all ...

Jie Cao; Qin Xu

2011-09-01T23:59:59.000Z

53

Numerical Consistency of Metric Terms in Terrain-Following Coordinates  

Science Conference Proceedings (OSTI)

In numerically integrating the equations of motion in terrain-following coordinates, care must be taken in treating the metric terms that arise due to the sloping coordinate surfaces. In particular, metric terms that appear in the advection and ...

Joseph B. Klemp; William C. Skamarock; Oliver Fuhrer

2003-07-01T23:59:59.000Z

54

On Estimating Dry Deposition Rates in Complex Terrain  

Science Conference Proceedings (OSTI)

In complex terrain, horizontal advection and filtration through a canopy can add substantially to the vertical diffusion component assumed to be the dominant transfer mechanism in conventional deposition velocity formulations. To illustrate this, ...

Bruce B. Hicks

2008-06-01T23:59:59.000Z

55

Classification and modeling of forested terrain using LIDAR sensing  

E-Print Network (OSTI)

To operate autonomously, unmanned ground vehicles (UGVs) must be able to identify the load-bearing surface of the terrain (i.e. the ground) and obstacles. Current sensing techniques work well for structured environments ...

McDaniel, Matthew W

2010-01-01T23:59:59.000Z

56

On relative permeability of rough-walled fractures  

DOE Green Energy (OSTI)

This paper presents a conceptual and numerical model of multiphase flow in fractures. The void space of real rough-walled rock fractures is conceptualized as a two-dimensional heterogeneous porous medium, characterized by aperture as a function of position in the fracture plane. Portions of a fracture are occupied by wetting and non-wetting phase, respectively, according to local capillary pressure and accessibility criteria. Phase occupancy and permeability are derived by assuming a parallel-plate approximation for suitably small subregions in the fracture plane. Wetting and non-wetting phase relative permeabilities are calculated by numerically simulating single phase flows separately in the wetted and non-wetted pore spaces. Illustrative examples indicate that relative permeabilities depend sensitively on the nature and range of spatial correlation between apertures. 30 refs., 7 figs., 1 tab.

Pruess, K.; Tsang, Y.W.

1989-01-01T23:59:59.000Z

57

ROUGHNESS LENGTHS FOR THE SAVANNAH RIVER SITE  

SciTech Connect

Surface roughness values for the areas surrounding the H, D and N-Area meteorological towers were computed from archived 2010 meteorological data. These 15-minute-averaged data were measured with cup anemometers and bidirectional wind vanes (bivanes) 61 m above the surface. The results of the roughness calculation using the standard deviation of elevation angle {sigma}{sub E}, and applying the simple formula based on tree canopy height, gave consistent estimates for roughness around the H-Area tower in the range of 1.76 to 1.86 m (95% confidence interval) with a mean value of 1.81 m. Application of the {sigma}{sub E} method for the 61-m level at D and N-Areas gave mean values of 1.71 and 1.81 with confidence ranges of 1.62-1.81 and 1.73-1.88 meters, respectively. Roughness results are azimuth dependent, and thus are presented as averages over compass sectors spanning 22.5 degrees. Calculated values were compared to other methods of determining roughness, including the standard deviation of the azimuth direction, {sigma}{sub A}, and standard deviation of the wind speed, {sigma}{sub U}. Additional data was obtained from a sonic anemometer at 61-m on the H-Area tower during a period of a few weeks in 2010. Results from the sonic anemometer support our use of {sigma}{sub E} to calculate roughness. Based on the H-Area tower results, a surface roughness of 1.8 m using is recommended for use in dispersion modeling applications that consider the impacts of a contaminant release to individuals along the Site boundary. The canopy surrounding the H-Area tower is relatively uniform (i.e., little variance in roughness by upwind direction), and data supplied by the U.S. Forest Service at Savannah River show that the canopy height and composition surrounding the H-Area tower is reasonably representative of forested areas throughout the SRS reservation. For dispersion modeling analyses requiring assessments of a co-located worker within the respective operations area, recommended area-specific values range from 0.3 m for E Area to 0.7 m for A Area at the Savannah River National Laboratory. These area-specific values, summarized in Table 4-1, were determined using the Environmental Protection Agency's AERSURFACE computer algorithm.

Hunter, C.

2012-03-28T23:59:59.000Z

58

RFCM: A Hybrid Clustering Algorithm Using Rough and Fuzzy Sets  

Science Conference Proceedings (OSTI)

A hybrid unsupervised learning algorithm, termed as rough-fuzzy c-means, is proposed in this paper. It comprises a judicious integration of the principles of rough sets and fuzzy sets. While the concept of lower and upper approximations of rough sets ... Keywords: Pattern recognition, clustering, data mining, fuzzy c-means, rough sets

Pradipta Maji; Sankar K. Pal

2007-12-01T23:59:59.000Z

59

Improving visual quality of synthetic terrains using weathering simulation on graphics processing unit.  

E-Print Network (OSTI)

??Visual simulation of natural eroded terrains using computer graphics has always been a fascinating research field. While many algorithms have been developed to improve terrain… (more)

Nguyen, Hoang Anh.

2008-01-01T23:59:59.000Z

60

Access to the ALS  

NLE Websites -- All DOE Office Websites (Extended Search)

Access to the ALS Access to the ALS Print User Access The ALS experiment floor (Building 6) is a Controlled Access Area for radiation protection. All ALS users are required to...

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Access to the ALS  

NLE Websites -- All DOE Office Websites (Extended Search)

Gate Access Access to the ALS Print User Access The ALS experiment floor (Building 6) is a Controlled Access Area for radiation protection. All ALS users are required to register...

62

Generating color terrain images in an emergency response system  

Science Conference Proceedings (OSTI)

The Atmospheric Release Advisory Capability (ARAC) provides real-time assessments of the consequences resulting from an atmospheric release of radioactive material. In support of this operation, a system has been created which integrates numerical models, data acquisition systems, data analysis techniques, and professional staff. Of particular importance is the rapid generation of graphical images of the terrain surface in the vicinity of the accident site. A terrain data base and an associated acquisition system have been developed that provide the required terrain data. This data is then used as input to a collection of graphics programs which create and display realistic color images of the terrain. The graphics system currently has the capability of generating color shaded relief images from both overhead and perspective viewpoints within minutes. These images serve to quickly familiarize ARAC assessors with the terrain near the release location, and thus permit them to make better informed decisions in modeling the behavior of the released material. 7 refs., 8 figs.

Belles, R.D.

1985-08-01T23:59:59.000Z

63

Combinatorial Block Copolymer Ordering on Tunable Rough  

DOE Green Energy (OSTI)

Morphology control of block copolymer (BCP) thin films through substrate interaction via controlled roughness parameters is of significant interest for numerous high-tech applications ranging from solar cells to high-density storage media. While effects of substrate surface energy (SE) and roughness (R) on BCP morphology have been individually investigated, their synergistic effects have not been explored in any systematic manner. Interestingly, orientation response of BCP to changes in SE can be similar to what can be accomplished with variations in R. Here we present a novel approach for orienting lamellar BCP films of poly(styrene)-block-poly(methyl methacrylate) (PS-PMMA) on spin-coated xerogel (a dried gel of silica nanoparticle network) substrate with simultaneously tunable surface energy, {gamma}{sub s} {approx} 29-53 mJ/m{sup 2}, by UVO exposure and roughness, R{sub rms} {approx} 0.5-30 nm, by sol-gel processing steps of regulating the catalyst concentration and sol aging time. As in previous BCP orientation studies on 20 nm diameter monodisperse silica nanoparticle coated surface, we find a similar but broadened oscillatory BCP orientation behavior with film thickness due to the random rather than periodic rough surfaces. We also find that higher random roughness amplitude is not the necessary criteria for obtaining a vertical orientation of BCP lamellae. Rather, a high surface fractal dimension (D{sub f} > 2.4) of the rough substrate in conjunction with an optimal substrate surface energy {gamma}{sub s} 29 mJ/m{sup 2} results in 100% vertically oriented lamellar microdomains. The AFM measured film surface microstructure correlates well with the internal 3D BCP film structure probed by grazing incidence small-angle X-ray scattering (GISAXS) and rotational small-angle neutron scattering (SANS). In contrast to tunable self-assembled monolayer (SAM)-coated substrates, the xerogel films are very durable and retain their chemical properties over period of several months. These results also highlight importantly that BCP orientation control for nanotechnology is possible not only on specially prepared patterned substrates but also on industrially viable sol-gel substrates.

Kulkarni M. M.; Yager K.; Sharma, A.; Karim, A.

2012-05-01T23:59:59.000Z

64

High-Resolution Aeromagnetic Mapping Of Volcanic Terrain, Yellowstone  

Open Energy Info (EERE)

High-Resolution Aeromagnetic Mapping Of Volcanic Terrain, Yellowstone High-Resolution Aeromagnetic Mapping Of Volcanic Terrain, Yellowstone National Park Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: High-Resolution Aeromagnetic Mapping Of Volcanic Terrain, Yellowstone National Park Details Activities (1) Areas (1) Regions (0) Abstract: High-resolution aeromagnetic data acquired over Yellowstone National Park (YNP) show contrasting patterns reflecting differences in rock composition, types and degree of alteration, and crustal structures that mirror the variable geology of the Yellowstone Plateau. The older, Eocene, Absaroka Volcanic Supergroup, a series of mostly altered, andesitic volcanic and volcaniclastic rocks partially exposed in mountains on the eastern margin of YNP, produces high-amplitude, positive magnetic

65

A timeshared foreline and roughing vacuum system  

SciTech Connect

A system to perform turbomolecular drag foreline pumping and scattering chamber roughing was installed in the Surface Modification and Characterization Research Center at Oak Ridge National Laboratory. The system consists of an oil-free mechanical scroll pump that can be connected to either a roughing manifold serving four scattering chambers or to a foreline ballast tank and manifold serving five turbomolecular drag pumps. A controller mediates the demands of the two manifolds, giving priority to the foreline. Due to the low leakage from the accelerator beamlines, the duty cycle in the foreline pumping mode consists of a few minutes of operating time every few days, greatly reducing wear on the scroll pump. Significant savings are realized due to reduced consumption of liquid nitrogen for sorption pumping, elimination of oil changes and repairs to individual mechanical foreline pumps, and lower electrical power consumption.

Hensley, D.K.; Thomas, D.K.; Poker, D.B. [Oak Ridge National Lab., TN (United States). Solid State Div.

1997-11-01T23:59:59.000Z

66

Real Time Physically-Based Modeling and Simulation of Cratering and Fragmentation of Terrain  

Science Conference Proceedings (OSTI)

Cratering and fragmentation of terrain due to eXplosions are the behaviors of interest in this effort. We propose a physically-based approach to model the eXplosion event and the process of terrain fragmentation resulting in the formation of craters. ... Keywords: dynamic terrain, eXplosion simulation, physics-based modeling, real time system, simulation, terrain database

Nabil Rami; Michael D. Proctor

2007-12-01T23:59:59.000Z

67

All-Terrain Vehicle: Non-Road Electric Vehicle Demonstration  

Science Conference Proceedings (OSTI)

An all-terrain vehicle (ATV) is defined by the American National Standards Institute (ANSI) as one that travels on low-pressure tires, with a seat that is straddled by the operator or the operator and one passenger, along with handlebars for steering control. As the name implies, it is designed to handle a wider variety of terrain than most other vehicles. The gasoline-fueled four-wheel drive option is now the most popular type of ATV, with expanding uses in industries such as farming, ranching, and cons...

2009-12-21T23:59:59.000Z

68

On the Parameterization of Surface Roughness at Regional Scales  

Science Conference Proceedings (OSTI)

A parameterization for surface roughness and blending height at regional scales, under neutral atmospheric stability, is studied and tested. The analysis is based on a suite of large-eddy simulations (LES) over surfaces with varying roughness ...

Elie Bou-Zeid; Marc B. Parlange; Charles Meneveau

2007-01-01T23:59:59.000Z

69

Internal Wave Reflection and Scatter from Sloping Rough Topography  

Science Conference Proceedings (OSTI)

Internal gravity waves propagating in a uniformly stratified ocean are scattered on reflection from a rough inclined boundary. The boundary is inclined at angle ? to the horizontal and the roughness is represented by superimposed sinusoidal ...

S. A. Thorpe

2001-02-01T23:59:59.000Z

70

A Note on the Ocean Surface Roughness Spectrum  

Science Conference Proceedings (OSTI)

In a recent study, the dimensionless surface roughness spectrum has been empirically parameterized as a power-law function of the dimensionless wind speed expressed as the ratio of wind friction velocity and phase speed of the surface roughness ...

Paul A. Hwang

2011-03-01T23:59:59.000Z

71

On the Climate Impact of Surface Roughness Anomalies  

Science Conference Proceedings (OSTI)

Large-scale deployment of wind power may alter climate through alteration of surface roughness. Previous research using GCMs has shown large-scale impacts of surface roughness perturbations but failed to elucidate the dynamic mechanisms that ...

Daniel B. Kirk-Davidoff; David W. Keith

2008-07-01T23:59:59.000Z

72

Geolocation of Multiple Targets from Airborne Video Without Terrain Data  

Science Conference Proceedings (OSTI)

The task of geolocating targets from airborne video is required for many applications in surveillance, law enforcement, reconnaissance, etc. The usual approaches to target geolocation involve terrain data, single target tracking, gimbal control of camera ... Keywords: Geolocation, IMU-Camera calibration, Tracking, Unmanned aerial vehicle

Kyung Min Han; Guilherme N. Desouza

2011-04-01T23:59:59.000Z

73

Access to the ALS  

NLE Websites -- All DOE Office Websites (Extended Search)

Access to the ALS Print User Access The ALS experiment floor (Building 6) is a Controlled Access Area for radiation protection. All ALS users are required to register with the ALS...

74

Reasoning with rough description logics: An approximate concepts approach  

Science Conference Proceedings (OSTI)

The current research progress and the existing problems of uncertain or imprecise knowledge representation and reasoning in description logics are analyzed in this paper. Approximate concepts are introduced to description logics based on rough set theory, ... Keywords: Approximate concepts, Concepts, Description logics, Rough description logics, Rough set theory

Yuncheng Jiang; Ju Wang; Suqin Tang; Bao Xiao

2009-02-01T23:59:59.000Z

75

Capital Access Program (Vermont)  

Energy.gov (U.S. Department of Energy (DOE))

The Capital Access Program provides loan guarantees to small businesses seeking access to commercial credit. Premiums paid by the borrower and matched by Vermont Economic Development Authority fund...

76

Access Venture Partners | Open Energy Information  

Open Energy Info (EERE)

Logo: Access Venture Partners Name Access Venture Partners Address 8787 Turnpike Drive, Suite 260 Place Westminster, Colorado Zip 80030 Region Rockies Area Product Venture Capital Number of employees 1-10 Year founded 1998 Phone number 303-426-8899 Website http://www.accessvp.com/ Coordinates 39.854298°, -105.052635° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.854298,"lon":-105.052635,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

77

PRODUCING SATELLITE-DERIVED IRRADIANCES IN COMPLEX ARID TERRAIN  

Open Energy Info (EERE)

ASES 2003, Austin TX and submitted for publication in Solar Energy ASES 2003, Austin TX and submitted for publication in Solar Energy PRODUCING SATELLITE-DERIVED IRRADIANCES IN COMPLEX ARID TERRAIN Richard Perez & Marek Kmiecik ASRC, the University at Albany 251 Fuller Rd. Albany, NY 12203 perez@asrc.cestm.albany.edu Pierre Ineichen, CUEPE, University of Geneva 7 Route de Drize 1227 Carouge, Switzerland Pierre.Ineichen@cuepe.unige.ch Marek Kmiecik, ASRC Kathleen Moore, IED 251 Fuller Rd. Albany, NY 12203 moore@iedat.com David Renne & Ray George NREL 1617 Cole Blvd. Golden, CO 80401 drenne / ray_george@nrel.nrel.gov ABSTRACT This paper describes a methodology to correct satellite- derived irradiances over complex terrain. The correction applies to satellite models using visible images from geostationary satellites. 1. DESCRIPTION OF CURRENT MODEL

78

All-Terrain Vehicle: Non-Road Electric Vehicle Demonstration  

Science Conference Proceedings (OSTI)

An all-terrain vehicle (ATV) is defined by the American National Standards Institute (ANSI) as one that travels on low-pressure tires, with a seat that is straddled by the operator or the operator and one passenger, along with handlebars for steering control. Most ATVs are gas powered, but replacement of gas-powered ATVs with an electric equivalent could reduce emissions output, fuel consumption, and other petrochemical byproducts resulting from operation of these vehicles. An electric ATV offers all of ...

2010-12-31T23:59:59.000Z

79

Atmospheric transport in complex terrain at Los Alamos, Area G  

Science Conference Proceedings (OSTI)

This report documents the atmospheric dispersion used in the Area G Performance Assessment for off-site airborne dose calculations. Potential airborne contaminants from the mesa top disposal facility disperse in the complex terrain dominated by narrow mesas in parallel to narrow canyons. The dispersion is characterized by site-specific values of X/Q [(Ci/m{sup 3})/(Ci/s)] at each of two designated receptor locations, a {open_quote}maximum off-site dose{close_quote} location and a nearby population center (White Rock, NM). The values of X/Q in each of the sixteen wind sectors are first estimated with the CAP-88 computer code using 1992 annual meteorologic data from Area G and assuming an area source for release. This data captures the dominant wind direction on the mesa tops from the SSW. These dispersion parameters are assumed to apply to open, flat terrain and must be corrected for the complex mesa and canyon terrain terrain surrounding the Area G site. Additional meteorologic data has been collected over two years from six remote temporary meteorological stations operated on the mesas and in the canyons immediately around Area G. These data indicate that the wind flow in the canyons is exclusively bimodel, flowing up canyon during the day and down canyon at night. It is conservatively assumed that all ground level releases from Area G which blow out across an adjacent canyon become entrained in the canyon flow. This effectively combines the contaminant release for several sectors into a single canyon flow which is upstream during the day or downstream at night. This canyon channeling mechanism is implemented in the model by summing the wind sector dispersion factors over those sectors appropriate to the geometry for a release from Area G toward either adjacent canyon.

Vold, E.L.

1997-03-01T23:59:59.000Z

80

Multiscale Evaluation of the Improvements in Surface Snow Simulation through Terrain Adjustments to Radiation  

Science Conference Proceedings (OSTI)

The downwelling shortwave radiation on the earth’s land surface is affected by the terrain characteristics of slope and aspect. These adjustments, in turn, impact the evolution of snow over such terrain. This article presents a multiscale ...

Sujay V. Kumar; Christa D. Peters-Lidard; David Mocko; Yudong Tian

2013-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Exploring the Possible Role of Small-Scale Terrain Drag on Stable Boundary Layers over Land  

Science Conference Proceedings (OSTI)

This paper addresses the possible role of unresolved terrain drag, relative to the turbulent drag on the development of the stable atmospheric boundary layer over land. Adding a first-order estimate for terrain drag to the turbulent drag appears ...

G. J. Steeneveld; A. A. M. Holtslag; C. J. Nappo; B. J. H. van de Wiel; L. Mahrt

2008-10-01T23:59:59.000Z

82

Plume Dispersion Anomalies in a Nocturnal Urban Boundary Layer in Complex Terrain  

Science Conference Proceedings (OSTI)

The URBAN 2000 experiments were conducted in the complex urban and topographical terrain in Salt Lake City, Utah, in stable nighttime conditions. Unexpected plume dispersion often arose because of the interaction of complex terrain and mountain–...

Dennis Finn; Kirk L. Clawson; Roger G. Carter; Jason D. Rich; K. Jerry Allwine

2008-11-01T23:59:59.000Z

83

Web accessible image similarity measurements  

Science Conference Proceedings (OSTI)

Web accessible image similarity measurements. Background: There ... messages). Web Access to Image Similarity Measurements. ...

2013-04-16T23:59:59.000Z

84

Reprinted from "Scattering and Surface Roughness," Z.-H. Gu ...  

Science Conference Proceedings (OSTI)

Page 1. Reprinted from "Scattering and Surface Roughness," Z.-H. Gu and AA Maradudin, Editors, Proc. SPIE 3141, 220-231 (1997) Page 2. Page 3 ...

2010-08-19T23:59:59.000Z

85

Rough surface mitigates electron and gas emission  

SciTech Connect

Heavy-ion beams impinging on surfaces near grazing incidence (to simulate the loss of halo ions) generate copious amounts of electrons and gas that can degrade the beam. We measured emission coefficients of {eta}{sub e} {le} 130 and {eta}{sub 0} {approx} 10{sup 4} respectively, with 1 MeV K{sup +} incident on stainless steel. Electron emission scales as {eta}{sub e} {proportional_to} 1/cos({theta}), where {theta} is the ion angle of incidence relative to normal. If we were to roughen a surface by blasting it with glass beads, then ions that were near grazing incidence (90{sup o}) on smooth surface would strike the rims of the micro-craters at angles closer to normal incidence. This should reduce the electron emission: the factor of 10 reduction, Fig. 1(a), implies an average angle of incidence of 62{sup o}. Gas desorption varies more slowly with {theta} (Fig. 1(b)) decreasing a factor of {approx}2, and along with the electron emission is independent of the angle of incidence on a rough surface. In a quadrupole magnet, electrons emitted by lost primary ions are trapped near the wall by the magnetic field, but grazing incidence ions can backscatter and strike the wall a second time at an azimuth where magnetic field lines intercept the beam. Then, electrons can exist throughout the beam (see the simulations of Cohen, HIF News 1-2/04). The SRIM (TRIM) Monte Carlo code predicts that 60-70% of 1 MeV K{sup +} ions backscatter when incident at 88-89{sup o} from normal on a smooth surface. The scattered ions are mostly within {approx}10{sup o} of the initial direction but a few scatter by up to 90{sup o}. Ion scattering decreases rapidly away from grazing incidence, Fig. 1(c ). At 62 deg. the predicted ion backscattering (from a rough surface) is 3%, down a factor of 20 from the peak, which should significantly reduce electrons in the beam from lost halo ions. These results are published in Phys. Rev. ST - Accelerators and Beams.

Molvik, A

2004-09-03T23:59:59.000Z

86

On-the-Fly Decompression and Rendering of Multiresolution Terrain  

SciTech Connect

We present a streaming geometry compression codec for multiresolution, uniformly-gridded, triangular terrain patches that supports very fast decompression. Our method is based on linear prediction and residual coding for lossless compression of the full-resolution data. As simplified patches on coarser levels in the hierarchy already incur some data loss, we optionally allow further quantization for more lossy compression. The quantization levels are adaptive on a per-patch basis, while still permitting seamless, adaptive tessellations of the terrain. Our geometry compression on such a hierarchy achieves compression ratios of 3:1 to 12:1. Our scheme is not only suitable for fast decompression on the CPU, but also for parallel decoding on the GPU with peak throughput over 2 billion triangles per second. Each terrain patch is independently decompressed on the fly from a variable-rate bitstream by a GPU geometry program with no branches or conditionals. Thus we can store the geometry compressed on the GPU, reducing storage and bandwidth requirements throughout the system. In our rendering approach, only compressed bitstreams and the decoded height values in the view-dependent 'cut' are explicitly stored on the GPU. Normal vectors are computed in a streaming fashion, and remaining geometry and texture coordinates, as well as mesh connectivity, are shared and re-used for all patches. We demonstrate and evaluate our algorithms on a small prototype system in which all compressed geometry fits in the GPU memory and decompression occurs on the fly every rendering frame without any cache maintenance.

Lindstrom, P; Cohen, J D

2009-04-02T23:59:59.000Z

87

Pacific Ethanol Inc formerly Accessity Corporation | Open Energy  

Open Energy Info (EERE)

Ethanol Inc formerly Accessity Corporation Ethanol Inc formerly Accessity Corporation Jump to: navigation, search Name Pacific Ethanol Inc (formerly Accessity Corporation) Place Fresno, California Zip 93711 Product String representation "Accessity has a ... r and marketer." is too long. Coordinates 29.53815°, -95.448909° 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":29.53815,"lon":-95.448909,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

88

Contact mechanics for randomly rough surfaces  

E-Print Network (OSTI)

When two solids are squeezed together they will in general not make atomic contact everywhere within the nominal (or apparent) contact area. This fact has huge practical implications and must be considered in many technological applications. In this paper I briefly review basic theories of contact mechanics. I consider in detail a recently developed contact mechanics theory. I derive boundary conditions for the stress probability distribution function for elastic, elastoplastic and adhesive contact between solids and present numerical results illustrating some aspects of the theory. I analyze contact problems for very smooth polymer (PMMA) and Pyrex glass surfaces prepared by cooling liquids of glassy materials from above the glass transition temperature. I show that the surface roughness which results from the frozen capillary waves can have a large influence on the contact between the solids. The analysis suggest a new explanation for puzzling experimental results [L. Bureau, T. Baumberger and C. Caroli, arXiv:cond-mat/0510232] about the dependence of the frictional shear stress on the load for contact between a glassy polymer lens and flat substrates. I discuss the possibility of testing the theory using numerical methods, e.g., finite element calculations.

Bo N. J. Persson

2006-03-30T23:59:59.000Z

89

AIM-94-0800 Effect of Initial Ice Roughness  

E-Print Network (OSTI)

ice accretion phase. Using5close-up photography and videography Hansman has studied the initial phase of ice accretion. At warm temperatures, a runback zone aft of the rough zone is observed. WaterAIM-94-0800 Effect of Initial Ice Roughness on Airfoil Aerodynamics M. Bragg, M. Kerho and M

Bragg, Michael B.

90

Prediction of surface roughness using artificial neural network in lathe  

Science Conference Proceedings (OSTI)

In this study, the effect of tool geometry on surface roughness has been investigated in universal lathe. Machining process has been carried out on AISI 1040 steel in dry cutting condition using various insert geometry at depth of cut off 0.5 mm. At ... Keywords: artificial neural network, surface roughness, tool geometry

?akir Ta?demir; Süleyman Ne?eli; Ismail Sarita?; Süleyman Yaldiz

2008-06-01T23:59:59.000Z

91

Counterintuitive MCNPX Results for Scintillator Surface Roughness Effect  

Science Conference Proceedings (OSTI)

We have reported on our recent MCNPX simulation results of energy deposition for a group of 8 scintillation detectors, coupled with various rough surface patterns. The MCNPX results generally favored the detectors with various rough surface patterns. The observed MCNPX results are not fully explained by this work.

None

2012-08-12T23:59:59.000Z

92

Learning to visually predict terrain properties for planetary rovers  

E-Print Network (OSTI)

For future planetary exploration missions, improvements in autonomous rover mobility have the potential to increase scientific data return by providing safe access to geologically interesting sites that lie in rugged ...

Brooks, Christopher Allen, 1978-

2009-01-01T23:59:59.000Z

93

Role Based Access Control  

Science Conference Proceedings (OSTI)

... Nash and Poland [10] discuss the application of role based access control to cryptographic authentication devices commonly used in the banking ...

94

Access Grid - CECM  

E-Print Network (OSTI)

"The Access Grid (AG) is the ensemble of resources that can be used to support ... We shall also illustrate the basic capture capacities that Smart Technology's ...

95

Science Open Access Journals  

Office of Scientific and Technical Information (OSTI)

SOAJ allows the user to search multiple open access publications with a single query. Results are consolidated and returned in relevance-ranked order, and users are...

96

Making VRML Accessible  

Science Conference Proceedings (OSTI)

... Paper - Making VRML Accessible for People with Disabilities by Sandy Ressler and Qiming Wang to Appear in Proceeding of ASSETS 98. ...

97

Atmospheric studies in complex terrain: a planning guide for future studies  

Science Conference Proceedings (OSTI)

The objective of this study is to assist the US Department of Energy in Conducting its atmospheric studies in complex terrain (ASCOT0 by defining various complex terrain research systems and relating these options to specific landforms sites. This includes: (1) reviewing past meteorological and diffusion research on complex terrain; (2) relating specific terrain-induced airflow phenomena to specific landforms and time and space scales; (3) evaluating the technical difficulty of modeling and measuring terrain-induced airflow phenomena; and (4) avolving severdal research options and proposing candidate sites for continuing and expanding field and modeling work. To evolve research options using variable candidate sites, four areas were considered: site selection, terrain uniqueness and quantification, definition of research problems and research plans. 36 references, 111 figures, 20 tables.

Orgill, M.M.

1981-02-01T23:59:59.000Z

98

Accessibility validation with RAVEN  

Science Conference Proceedings (OSTI)

Testing is, for most, a necessary evil in the software life cycle. One very important form of testing is the evaluation of software products according to mandated criteria or guidelines such as those that specify level of accessibility. Such evaluations ... Keywords: AOP, GUI, Java, accessibility, reflection, rich-client

Barry Feigenbaum; Michael Squillace

2006-05-01T23:59:59.000Z

99

Accessing HPSS at NERSC  

NLE Websites -- All DOE Office Websites (Extended Search)

Accessing HPSS Accessing HPSS Accessing HPSS Once you have successfully generated an HPSS token you can access NERSC's HPSS in the different ways listed below. HSI and HTAR are usually the best ways to transfer data in and out of HPSS but other methods are also included. Access Method When to use this method Features Limitations HSI When a full-featured unix-like interface is desired high performance (parallel); unix-like user interface; firewall mode client is specific to HPSS version and might not work at other sites; HTAR When you have large collections of smaller (~10MB or less) files high performance (parallel); creates a tar file directly in HPSS along with an index file; more efficient for large collections of file same client limitations as HSI; also does not have firewall mode so using on a remote site with a firewall will require modification of firewall rules

100

Multilinguisme, variation, contact. Des pratiques langagières sur le terrain à l'analyse de corpus hétérogènes.  

E-Print Network (OSTI)

??Ce mémoire de synthèse présente un premier chapitre de positionnements épistémologiques (pratiques langagières, construction des objets, des données et des corpus, linguistique de terrain impliquée,… (more)

Léglise, Isabelle

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Surface Roughness Parameter Estimated with a Drag Technique  

Science Conference Proceedings (OSTI)

The surface roughness parameter, z0, can be estimated with different techniques. These techniques are analyzing the mean wind profile, estimating the surface drag coefficient and using the universal functions according to the Monin-Obukhov ...

Adrie F. G. Jacobs; Emile Schols

1986-11-01T23:59:59.000Z

102

Dark spot formation relative to ITO surface roughness for polyfluorene  

NLE Websites -- All DOE Office Websites (Extended Search)

Dark spot formation relative to ITO surface roughness for polyfluorene Dark spot formation relative to ITO surface roughness for polyfluorene devices Title Dark spot formation relative to ITO surface roughness for polyfluorene devices Publication Type Journal Article Year of Publication 2004 Authors Liu, Gao, John B. Kerr, and Stephen G. Johnson Journal Synthetic Metals Volume 144 Pagination 1-6 Keywords dark spot, failure mechanism, interface, ito surface, oled Abstract The failure behaviors of ITO/PEDOT;PSS/polyfluorene/Al devices are different depending on the surface roughness of the sputtered ITO anode film. The spikes on ITO surface are responsible for the initial local shorts of the device, which develop into dark spots very quickly. Indium adsorption is observed on the polymer and Al cathode interface. A chemical etching procedure is used to smoothen the ITO surface without changing the ITO thickness and the sheet resistance. Devices made out of smooth ITO show minimum changes at polymer-cathode interface during operation.

103

Effective Roughness Length for Turbulent Flow over a Wavy Surface  

Science Conference Proceedings (OSTI)

A two-equation turbulence model is used to calculate the effective roughness length for two-dimensional turbulent flow over small amplitude, wavy surface topography. The governing equations are solved using the method of matched asymptotic ...

S. J. Jacobs

1989-07-01T23:59:59.000Z

104

Influence of surface roughness and waviness upon thermal contact resistance  

E-Print Network (OSTI)

This work deals with the phenomenon of thermal resistance between contacting solids. Attention is directed towards contiguous solids possessing both surface roughness and waviness. When two such surfaces are brought together ...

Yovanovich, M. Michael

1967-01-01T23:59:59.000Z

105

The effect of roughness on aerosol deposition in tubes  

E-Print Network (OSTI)

Experimental measurements of simulated roughness within tubes and the subsequent aerosol penetration performance through these tubes were conducted for a aerosol particle size range of 5 nm to 20 nm and a flow rate range of 28 L/min to 169.9 L/min. The relative roughness for each of the tubes tested are as follows: clean aluminum pipe and clean copper tube, F,/D = 10-4; fine sandpaper pipe, F,/D = 0.017-12 helical ridges per linear centimeter copper tube, F,/D = 0.046; coarse sandpaper pipe, F,/D = 0.065. Non-dimensional quantities were used to produce an empirical model relating roughness to aerosol penetration. The dependent variable, aerosol penetration, was encompassed in the non-dimensional deposition velocity (v,) and modeled as a function of the dependent variables, non-dimensional particle relaxation time (,c,) and relative roughness (&/D). In addition, a method was developed for estimating when to remove the sampling transport lines for cleaning due to the roughness within the transport line. The empirical correlation fits the data over the range of 0. I 6 to 112 L/min. For these conditions, the model deviated from the experimental data by less than 10% with one outlier which deviated by 20% for the coarse sandpaper pipe at a flow rate of 1 12 L/min. The correlation was used to show that the transport lines should be removed for cleaning or replacement once the pressure drop has exceeded 7.5 mm Hg. The experimental data has shown that the aerosol penetration decreases below 85% for an internal roughness comparable to this pressure drop limit. The correlation for aerosol penetration in transport lines with internal roughness presented should be a beneficial engineering tool for predicting the aerosol losses in sampling systems where roughness is a concern. The correlation should be a useful sub-model for aerosol penetration prediction computational tools as well.

Chavez, Mario Cesar

1997-01-01T23:59:59.000Z

106

Ultrawideband radar clutter measurements of forested terrain, 1991--1992  

Science Conference Proceedings (OSTI)

The ultrawideband (UWB) radar clutter measurements project was conducted to provide radar clutter data for new ultrawideband radar systems which are currently under development. A particular goal of this project is to determine if conventional narrow band clutter data may be extrapolated to the UWB case. This report documents measurements conducted in 1991 and additional measurements conducted in 1992. The original project consisted of clutter measurements of forested terrain in the Olympic National Forest near Sequim, WA. The impulse radar system used a 30 kW peak impulse source with a 2 Gigasample/second digitizer to form a UHF (300--1000 MHz) ultrawideband impulse radar system. Additional measurements were conducted in parallel using a Systems Planning Corporation (SPC) step-chirp radar system. This system utilized pulse widths of 1330 nanoseconds over a bandwidth of 300--1000 MHz to obtain similar resolution to the impulse system. Due to the slow digitizer data throughput in the impulse radar system, data collection rates were significantly higher using the step-chirp system. Additional forest clutter measurements were undertaken in 1992 to increase the amount of data available, and especially to increase the amount of data from the impulse radar system.

Sheen, D.M.; Severtsen, R.H.; Prince, J.M.; Davis, K.C.; Collins, H.D.

1993-06-01T23:59:59.000Z

107

An augmented reality system for military operations in urban terrain  

E-Print Network (OSTI)

Many future military operations are expected to occur in urban environments. These complex, 3D battlefields introduce many challenges to the dismounted warfighter. Better situational awareness is required for effective operation in urban environments. However, delivering this information to the dismounted warfighter is extremely difficult. For example, maps draw a user's attention away from the environment and cannot directly represent the three-dimensional nature of the terrain. To overcome these difficulties, we are developing the Battlefield Augmented Reality System (BARS). The system consists of a wearable computer, a wireless network system, and a tracked see-through head-mounted display (HMD). The computer generates graphics that, from the user's perspective, appear to be aligned with the actual environment. For example, a building could be augmented to show its name, a plan of its interior, icons to represent reported sniper locations, and the names of adjacent streets. This paper surveys the current state of development of BARS and describes ongoing research efforts. We describe four major research areas. The first is the development of an effective, efficient user interface for displaying data and processing user inputs. The second is the capability for collaboration between multiple BARS users and other systems. Third, we describe the current hardware for both a mobile and indoor prototype system. Finally, we

Mark A. Livingston; Mark A. Livingston; Lawrence J. Rosenblum; Simon J. Julier; Dennis Brown; Yohan Baillot; J. Edward; Swan Ii; Joseph L. Gabbard; Deborah Hix

2002-01-01T23:59:59.000Z

108

The Broadband Access Facility  

Science Conference Proceedings (OSTI)

The deployment of broadband access networks will revolutionise many aspects of society in the early years of the next millennium. Manufacturers, telecommunications providers and cable television operators world-wide are investing heavily on research ...

J. Kelly; R. Adnams; M. Enrico; M. Whittle

2000-01-01T23:59:59.000Z

109

Thermal Hydraulic Effect of Fuel Plate Surface Roughness  

Science Conference Proceedings (OSTI)

This study presents surface roughness measurements characteristic of the pre-film layer applied to a typical Advanced Test Reactor (ATR) fuel plate. This data is used to estimate the friction factor for thermal hydraulic flow calculations of a Gas Test Loop (GTL) system proposed for incorporation into ATR to provide a fast neutron flux environment for the testing of nuclear fuels and materials. To attain the required neutron flux, the design includes booster fuel plates clad with the same aluminum alloy as the ATR driver fuel and cooled with water supplied by the ATR primary coolant pumps. The objectives of this study are to: (1) determine the surface roughness of the protective boehmite layer applied to the ATR driver fuel prior to reactor operations in order to specify the machining tolerances for the surface finish on simulated booster fuel plates in a GTL hydraulic flow test model, and (2) assess the consequent thermal hydraulic impact due to surface roughness on the coolability of the booster fuel with a similar pre-film layer applied. While the maximum roughness of this coating is specified to be 1.6 µm (63 microinches), no precise data on the actual roughness were available. A representative sample coupon autoclaved with the ATR driver fuel to produce the pre-film coating was analyzed using optical profilometry. Measurements yielded a mean surface roughness of 0.53 µm (21 microinches). Results from a sensitivity study show that a ±15% deviation from the mean measured surface finish would have a minimal effect on coolant temperature, coolant flow rate, and fuel temperature. However, frictional losses from roughnesses greater than 1.5 µm (~60 microinches) produce a marked decrease in flow rate, causing fuel and coolant temperatures to rise sharply.

Donna Post Guillen; Timothy S. Yoder

2008-09-01T23:59:59.000Z

110

Terrain modeling with multifractional Brownian motion and self-regulating processes  

Science Conference Proceedings (OSTI)

Approximate scale-invariance and local regularity properties of natural terrains suggest that they can be a accurately modeled with random processes which are locally fractal. Current models for terrain modeling include fractional and multifractional ... Keywords: (multifractional)brownian motion, digital elevation models, hölderian regularity

Antoine Echelard; Jacques Lévy Véhel; Olivier Barrière

2010-09-01T23:59:59.000Z

111

Rapid gravity and gravity gradiometry terrain corrections via an adaptive quadtree mesh discretization  

E-Print Network (OSTI)

Rapid gravity and gravity gradiometry terrain corrections via an adaptive quadtree mesh discretization Kristofer Davis1,2 M. Andy Kass1 Yaoguo Li1 1 Center for Gravity, Electrical, and Magnetic Studies of gravity gradiometry surveys utilising an adaptive quadtree mesh discretization. The data- and terrain

112

A Model for Objective Simulation of Boundary-Layer Winds in an Area of Complex Terrain  

Science Conference Proceedings (OSTI)

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. André Erasmus

1986-12-01T23:59:59.000Z

113

Optimization of scale and parametrization for terrain segmentation: An application to soil-landscape modeling  

Science Conference Proceedings (OSTI)

This paper presents a procedure to optimize parametrization and scale for terrain-based environmental modeling. The workflow was exemplified on crop yield data, which is assumed to represent a proxy for soil productivity. Focal mean statistics were used ... Keywords: Curvature, Focal mean statistics, OBIA, Regression, Soil productivity., Terrain segmentation

Lucian Drgu; Thomas Schauppenlehner; Andreas Muhar; Josef Strobl; Thomas Blaschke

2009-09-01T23:59:59.000Z

114

I/o-efficient efficient algorithms for computing contours on a terrain  

Science Conference Proceedings (OSTI)

A terrain M is the graph of a bivariate function. We assume that M is represented as a triangulated surface with N vertices. A contour (or isoline) of M is a connected component of a level set of M. Generically, each contour is a closed ... Keywords: contours, geographical information systems, i/o-efficient algorithms, terrains

Pankaj K. Agarwal; Lars Arge; Thomas Mølhave; Bardia Sadri

2008-06-01T23:59:59.000Z

115

ANALYZING SURFACE ROUGHNESS DEPENDENCE OF LINEAR RF LOSSES  

SciTech Connect

Topographic structure on Superconductivity Radio Frequency (SRF) surfaces can contribute additional cavity RF losses describable in terms of surface RF reflectivity and absorption indices of wave scattering theory. At isotropic homogeneous extent, Power Spectrum Density (PSD) of roughness is introduced and quantifies the random surface topographic structure. PSD obtained from different surface treatments of niobium, such Buffered Chemical Polishing (BCP), Electropolishing (EP), Nano-Mechanical Polishing (NMP) and Barrel Centrifugal Polishing (CBP) are compared. A perturbation model is utilized to calculate the additional rough surface RF losses based on PSD statistical analysis. This model will not consider that superconductor becomes normal conducting at fields higher than transition field. One can calculate the RF power dissipation ratio between rough surface and ideal smooth surface within this field range from linear loss mechanisms.

Reece, Charles E. [JLAB; Kelley, Michael J. [JLAB, W& M College; Xu, Chen [JLAB, W& M College

2012-09-01T23:59:59.000Z

116

Observations of a Terrain-Forced Mesoscale Vortex and Canyon Drainage Flows along the Front Range of Colorado  

Science Conference Proceedings (OSTI)

Observations taken during the February 1991 Atmospheric Studies in Complex Terrain (ASCOT) Winter Validation Study are used to describe the wind field associated with a terrain-forced mesoscale vortex and thermally forced canyon drainage flows ...

David H. Levinson; Robert M. Banta

1995-07-01T23:59:59.000Z

117

Hybrid rough sets intelligent system architecture for survival analysis  

Science Conference Proceedings (OSTI)

Survival analysis challenges researchers because of two issues. First, in practice, the studies do not span wide enough to collect all survival times of each individual patient. All of these patients require censor variables and cannot be analyzed without ... Keywords: Kaplan-Meier method, hybrid intelligent systems, reducts, rough sets, soft computing, survival analysis

Puntip Pattaraintakorn; Nick Cercone; Kanlaya Naruedomkul

2007-01-01T23:59:59.000Z

118

Approaches to Conflict Dynamics Based on Rough Sets  

Science Conference Proceedings (OSTI)

Conflict analysis and conflict resolution play an important role in negotiation during contract-management situations in many organizations. The issue here is how to model a combination of complex situations among agents where there are disagreements ... Keywords: Approximation space, conflict, conflict graph, conflict resolution, negotiation, requirements engineering, rough sets

Sheela Ramanna; James F. Peters; Andrzej Skowron

2007-01-01T23:59:59.000Z

119

RoSy: a rough knowledge base system  

Science Conference Proceedings (OSTI)

This paper presents a user-oriented view of ${\\mathcal R}o{\\mathcal S}y$, a ${\\mathcal R}{\\rm ough}$ Knowledge Base ${\\mathcal S}$ystem. The system tackles two problems not fully answered by previous research: the ability to define rough sets in terms ...

Robin Andersson; Aida Vitória; Jan Ma?uszy?ski; Jan Komorowski

2005-08-01T23:59:59.000Z

120

The Roughness Length for Heat of Sparse Vegetation  

Science Conference Proceedings (OSTI)

A dual-source model that solves the energy balance over vegetation and soil separately can be inverted to obtain the roughness length for heat z0h of a single-source model. Model parameters for the dual-source model were taken from previous ...

E. M. Blyth; A. J. Dolman

1995-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Producing Satellite-Derived Irradiances in Complex Arid Terrain | OpenEI  

Open Energy Info (EERE)

Producing Satellite-Derived Irradiances in Complex Arid Terrain Producing Satellite-Derived Irradiances in Complex Arid Terrain Dataset Summary Description (Abstract): This paper describes a methodology to correct satellite-derived irradiances over complex terrain. The correction applies to satellite models using visible images from geostationary satellites. (Purpose): Solar model documentation Source SUNY Albany Date Released June 26th, 2003 (11 years ago) Date Updated August 29th, 2003 (11 years ago) Keywords methodology solar SWERA UNEP validation Data application/pdf icon Download Report (pdf, 690.1 KiB) Quality Metrics Level of Review Some Review Comment Temporal and Spatial Coverage Frequency Time Period 1999 - 2002 License License Other or unspecified, see optional comment below Comment Please cite publication as follows: Perez, R., Ineichen, P., Moore, K., Kmiecik, M., Renné, D., and George, R. 2002.Producing Satellite-Derived Irradiances in Complex Arid Terrain. ASES 2003, Austin TX and submitted for publication in Solar Energy

122

A Simple Method for Spatial Interpolation of the Wind in Complex Terrain  

Science Conference Proceedings (OSTI)

The topographical elevation difference is proposed as a new variable for spatial interpolation of the sparse surface wind measurements to a finer mesh in a complex terrain area. The most used method for the initialization of diagnostic wind field ...

I. Palomino; F. Martín

1995-07-01T23:59:59.000Z

123

Terrain-Induced Turbulence over Lantau Island: 7 June 1994 Tropical Storm Russ Case Study  

Science Conference Proceedings (OSTI)

Numerical simulations of terrain-induced turbulence associated with airflow over Lantau Island of Hong Kong are presented. Lantau is a relatively small island with three narrow peaks rising to between 700 and 950 m above mean sea level. This ...

Terry L. Clark; Teddie Keller; Janice Coen; Peter Neilley; Hsiao-ming Hsu; William D. Hall

1997-07-01T23:59:59.000Z

124

Gravity Wave Breaking over the Central Alps: Role of Complex Terrain  

Science Conference Proceedings (OSTI)

The characteristics of gravity waves excited by the complex terrain of the central Alps during the intensive observational period (IOP) 8 of the Mesoscale Alpine Programme (MAP) is studied through the analysis of aircraft in situ measurements, ...

Qingfang Jiang; James D. Doyle

2004-09-01T23:59:59.000Z

125

Geolocation of man-made reservoirs across terrains of varying complexity using GIS  

Science Conference Proceedings (OSTI)

The Reservoir Sedimentation Survey Information System (RESIS) is one of the world's most comprehensive databases of reservoir sedimentation rates, comprising nearly 6000 surveys for 1819 reservoirs across the continental United States. Sediment surveys ... Keywords: DEM, GIS, Reservoir sedimentation, Terrain complexity

David M. Mixon; David A. Kinner; Robert F. Stallard; James P. M. Syvitski

2008-10-01T23:59:59.000Z

126

Transferability of a Three-Dimensional Air Quality Model between Two Different Sites in Complex Terrain  

Science Conference Proceedings (OSTI)

The three-dimensional, diagnostic, particle-in-cell transport and diffusion model MATHEW/ADPIC is used to test its transferability from one site in complex terrain to another with different characteristics, under stable nighttime drainage flow ...

Rolf Lange

1989-07-01T23:59:59.000Z

127

An Investigation of Terrain Effects on the Mesoscale Spectrum of Atmospheric Motions  

Science Conference Proceedings (OSTI)

Wind and temperature data collected on commercial aircraft during the Global Atmospheric Sampling Program (GASP) are used to investigate the effects of underlying terrain on mesoscale variability, and the observational results are interpreted ...

G. D. Nastrom; D. C. Fritts; K. S. Gage

1987-10-01T23:59:59.000Z

128

An Examination of Residual Wind Fluctuations Observed at 10 m over Flat Terrain  

Science Conference Proceedings (OSTI)

This study investigates the behavior of wind fluctuations observed at the 10-m level over a flat terrain site located some 100 km east of the Rocky Mountains. The purposes were to assess residual fluctuations in order to ascertain effects ...

D. M. Leahey; M. C. Hansen; M. B. Schroeder

1996-01-01T23:59:59.000Z

129

Numerical Study of Terrain-Induced Mesoscale Motions in a Mixed Layer  

Science Conference Proceedings (OSTI)

Numerical integrations using a potential enstrophy conserving scheme are presented for the flow within a mixed layer over hilly terrain using the hydrostatic shallow-water equations with a quadratic drag law. The mesoscale area treated is 150 km ...

Y-J. Han; K. Ueyoshi; J. W. Deardorff

1982-11-01T23:59:59.000Z

130

Lidar Descriptions of Mixing-Layer Thickness Characteristics in a Complex Terrain/Coastal Environment  

Science Conference Proceedings (OSTI)

Airborne lidar and supplementary measurements made during a major study of air chemistry in southern California (SCCCAMP 1985) provided a rare opportunity to examine atmospheric boundary-layer structure in a coastal area with complex terrain. ...

James L. McElroy; Ted B. Smith

1991-05-01T23:59:59.000Z

131

Orographic Clouds in Terrain-Blocked Flows: An Idealized Modeling Study  

Science Conference Proceedings (OSTI)

Idealized numerical simulations of moist strongly stratified flow over topography are used to study the processes that control orographic clouds in terrain-blocked flows as a joint function of the nondimensional flow parameter Nh/U, the ...

Joseph Galewsky

2008-11-01T23:59:59.000Z

132

On the Ability of the WRF Model to Reproduce the Surface Wind Direction over Complex Terrain  

Science Conference Proceedings (OSTI)

The ability of the Weather Research and Forecasting (WRF) model to reproduce the surface wind direction over complex terrain is examined. A simulation spanning a winter season at a high horizontal resolution of 2 km is compared with wind direction ...

Pedro A. Jiménez; Jimy Dudhia

2013-07-01T23:59:59.000Z

133

Average Diurnal Behavior of Surface Winds during Summer at Sites in Complex Terrain  

Science Conference Proceedings (OSTI)

Mean diurnal wind distributions from five surface stations in the rugged Geysers area of northern California were examined to determine how they were affected by the terrain. The one dimensional slope-flow model of Garrett was able to simulate ...

Alfred J. Garrett; Frank G. Smith III

1985-02-01T23:59:59.000Z

134

Radiosity Approach for the Shortwave Surface Radiation Balance in Complex Terrain  

Science Conference Proceedings (OSTI)

The influence of topography on the radiation balance in complex terrain has so far been investigated either with very simple or very sophisticated approaches that are limited, respectively, by an uncontrolled spatial representation of radiative ...

Nora Helbig; Henning Löwe; Michael Lehning

2009-09-01T23:59:59.000Z

135

Accurate Wind Characterization in Complex Terrain Using the Immersed Boundary Method  

DOE Green Energy (OSTI)

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

2009-09-30T23:59:59.000Z

136

Mesoscale Boundary Layer Evolution over Complex Terrain. Part I. Numerical Simulation of the Diurnal Cycle  

Science Conference Proceedings (OSTI)

The continuous development of a meso-?-scale boundary layer over sloping terrain upwind of a high mountain barrier was simulated through a complete diurnal cycle using a nonhydrostatic boundary-layer model. The simulation detailed the evolution ...

David C. Bader; Thomas B. McKee; Gregory J. Tripoli

1987-10-01T23:59:59.000Z

137

Mesoscale Modeling and Four-Dimensional Data Assimilation in Areas of Highly Complex Terrain  

Science Conference Proceedings (OSTI)

A multiscale four-dimensional data assimilation (FDDA) technique, based on Newtonian relaxation, is incorporated into a mesoscale model and evaluated using meteorological and tracer data collected during the Atmospheric Studies in Complex Terrain ...

J. D. Fast

1995-12-01T23:59:59.000Z

138

The Principles of Laboratory Modeling of Stratified Atmospheric Flows over Complex Terrain  

Science Conference Proceedings (OSTI)

Laboratory modeling provides a reasonably quick and relatively inexpensive method for investigating stratified air Row around mesoscale topography. Quantitative results for stratified flow over complex terrain may be obtained from suitably ...

Peter G. Baines; Peter C. Manins

1989-11-01T23:59:59.000Z

139

Regional-Scale Flows in Mountainous Terrain. Part II: Simplified Numerical Experiments  

Science Conference Proceedings (OSTI)

A series of two- and three-dimensional idealized numerical experiments are conducted to examine the effects of different physical processes upon the development of the thermally driven regional-scale circulations over mountainous terrain ...

James E. Bossert; William R. Cotton

1994-07-01T23:59:59.000Z

140

Three-Dimensional Numerical Model Simulations of Airflow Over Mountainous Terrain: A Comparison with Observations  

Science Conference Proceedings (OSTI)

Numerical simulations of airflow over two different choices of mountainous terrain and the comparisons of results with aircraft observations are presented. Two wintertime casts for flow over Elk Mountain, Wyoming where surface heating is assumed ...

Terry L. Clark; Robert Gall

1982-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Spatial Interpolation of Meteorological Data in Complex Terrain Using Temporal Statistics  

Science Conference Proceedings (OSTI)

Diagnostic wind field numerical models have significant difficulty developing representative wind velocities in complex terrain. A large of this difficulty begins with the initial wind field interpolation. If this interpolated wind field does not ...

William Porch; Daniel Rodriguez

1987-12-01T23:59:59.000Z

142

A Forward-in-Time Anelastic Nonhydrostatic Model in a Terrain-Following Coordinate  

Science Conference Proceedings (OSTI)

A three-dimensional (3D) forward-in-time anelastic nonhydrostatic model in a terrain-following coordinate is developed to investigate mesoscale circulations over topography. The anelastic nonhydrostatic model utilizes the deep-continuity equation,...

Ching-Yuang Huang

2000-07-01T23:59:59.000Z

143

An Analysis of Wind Direction and Horizontal Wind Component Fluctuations over Complex Terrain  

Science Conference Proceedings (OSTI)

Based on an extensive wind dataset over complex terrain, the commonly used small-angle approximation ?v ? ??V is studied and found to overestimate over all wind speeds and ?? values observed. This should be anticipated due to the assumptions ...

K. H. Papadopoulos; C. G. Helmis; G. T. Amanatidis

1992-09-01T23:59:59.000Z

144

Implications of Small-Scale Flow Features to Modeling Dispersion over Complex Terrain  

Science Conference Proceedings (OSTI)

Small-scale, topographically forced wind systems often have a strong influence on flow over complex terrain. A problem is that these systems are very difficult to measure, because of their limited spatial and temporal extent. They can be ...

R. M. Banta; L. D. Olivier; P. H. Gudiksen; R. Lange

1996-03-01T23:59:59.000Z

145

Impact of Environmental Variations on Simulated Squall Lines Interacting with Terrain  

Science Conference Proceedings (OSTI)

The complex evolution of convective systems crossing (or attempting to cross) mountainous terrain represents a substantial forecasting challenge. This study examines the processes associated with environments of “crossing” squall lines (which were ...

Casey E. Letkewicz; Matthew D. Parker

2011-10-01T23:59:59.000Z

146

QNH: Mesoscale Bounded Derivative Initialization and Winter Storm Test over Complex Terrain  

Science Conference Proceedings (OSTI)

Mesoscale bounded derivative initialization (BDI) is utilized to derive dynamical constraints, from which elliptic equations are formulated to derive smooth initial fields over complex terrain for mesoscale models. The initialization is ...

J. L. Lee; A. E. MacDonald

2000-04-01T23:59:59.000Z

147

An implementation of terrain geomorphing in the vertex shader for synthetic planetary surfaces  

E-Print Network (OSTI)

The purpose of this research is to develop the three-dimensional models of planetary surfaces which can be used in the test environments for the Vision-Based Navigation Systems' (VBNS) terrain recognition and navigation ...

Colagiovanni, Lawrence W. (Lawrence William)

2008-01-01T23:59:59.000Z

148

Geostatistical Mapping of Precipitation from Rain Gauge Data Using Atmospheric and Terrain Characteristics  

Science Conference Proceedings (OSTI)

A geostatistical framework for integrating lower-atmosphere state variables and terrain characteristics into the spatial interpolation of rainfall is presented. Lower-atmosphere state variables considered are specific humidity and wind, derived ...

Phaedon C. Kyriakidis; Jinwon Kim; Norman L. Miller

2001-11-01T23:59:59.000Z

149

Spatial Snow Modeling of Wind-Redistributed Snow Using Terrain-Based Parameters  

Science Conference Proceedings (OSTI)

Wind is widely recognized as one of the dominant controls of snow accumulation and distribution in exposed alpine regions. Complex and highly variable wind fields in rugged terrain lead to similarly complex snow distribution fields with areas of ...

Adam Winstral; Kelly Elder; Robert E. Davis

2002-10-01T23:59:59.000Z

150

Relationship of Synoptic Winds and Complex Terrain Flows during the MISTRAL Field Experiment  

Science Conference Proceedings (OSTI)

The relationship between the surface and synoptic wind direction is examined climatologically in a complex terrain region. Surface winds were observed over a 1-yr period during the MISTRAL project in the Basel, Switzerland, area. The measurement ...

Rudolf O. Weber; Pirmin Kaufmann

1998-11-01T23:59:59.000Z

151

Diagnostic Wind Field Modeling for Complex Terrain: Model Development and Testing  

Science Conference Proceedings (OSTI)

A three dimensional diagnostic wind field model is shown to be capable of generating potential flow solutions associated with simple terrain features. This is achieved by modifying an initially uniform background wind to make the flow divergence ...

D. G. Ross; I. N. Smith; P. C. Manins; D. G. Fox

1988-07-01T23:59:59.000Z

152

Verification of Mesoscale Numerical Weather Forecasts in Mountainous Terrain for Application to Avalanche Prediction  

Science Conference Proceedings (OSTI)

Two high-resolution, real-time, numerical weather prediction (NWP) models are verified against case study observations to quantify their accuracy and skill in the mountainous terrain of western Canada. These models, run daily at the University of ...

Claudia Roeger; Roland Stull; David McClung; Joshua Hacker; Xingxiu Deng; Henryk Modzelewski

2003-12-01T23:59:59.000Z

153

The Energy Budget of Canadian Shield Subarctic Terrain and Its Impact on Hillslope Hydrological Processes  

Science Conference Proceedings (OSTI)

The objective of the study is to determine the local processes that control the partitioning of the energy budget of shield terrain in the western Canadian subarctic. The magnitude of the spring snowmelt and its potential to flood exposed bedrock ...

Christopher Spence; Wayne R. Rouse

2002-04-01T23:59:59.000Z

154

Sensitivities of Orographic Precipitation to Terrain Geometry and Upstream Conditions in Idealized Simulations  

Science Conference Proceedings (OSTI)

This study examines how variations in relatively simple terrain geometries influence orographic precipitation and its spatial patterns of sensitivity to small changes in upstream conditions. An idealized three-dimensional model is used to simulate ...

Campbell D. Watson; Todd P. Lane

2012-04-01T23:59:59.000Z

155

Near-Real-Time Applications of a Mesoscale Analysis System to Complex Terrain  

Science Conference Proceedings (OSTI)

Several mesoscale data analysis systems are reviewed, of which one is then adapted and applied to the complex terrain of northwest Utah and the western United States. The analysis system relies on the simple, but computationally efficient, ...

Steven M. Lazarus; Carol M. Ciliberti; John D. Horel; Keith A. Brewster

2002-10-01T23:59:59.000Z

156

Geostatistical Mapping of Mountain Precipitation Incorporating Autosearched Effects of Terrain and Climatic Characteristics  

Science Conference Proceedings (OSTI)

Hydrologic and ecologic studies in mountainous terrain are sensitive to the temporal and spatial distribution of precipitation. In this study a geostatistical model, Auto-Searched Orographic and Atmospheric Effects Detrended Kriging (ASOADeK), is ...

Huade Guan; John L. Wilson; Oleg Makhnin

2005-12-01T23:59:59.000Z

157

A Mesoscale Analysis Method for Surface Potential Temperature in Mountainous and Coastal Terrain  

Science Conference Proceedings (OSTI)

A technique is developed to anisotropically spread surface observations in steep valleys. The goal is to create an improved objective analysis for the lowest, terrain-following numerical weather prediction (NWP) model level in mountainous ...

Xingxiu Deng; Roland Stull

2005-02-01T23:59:59.000Z

158

A Simple Model for Correcting Sodar and Lidar Errors in Complex Terrain  

Science Conference Proceedings (OSTI)

Ground-based sensing of wind profiles by sodars and lidars is becoming the standard for wind energy and other applications. However, there remain difficulties in complex terrain since the instruments sense wind components in spatially separated ...

Stuart Bradley

2012-12-01T23:59:59.000Z

159

Airborne Doppler Lidar Measurements of Valley Flows in Complex Coastal Terrain  

Science Conference Proceedings (OSTI)

Three-dimensional winds obtained with an airborne Doppler lidar are used to investigate the spatial structure of topographically driven flows in complex coastal terrain in Southern California. The airborne Doppler lidar collected four hours of ...

S. F. J. De Wekker; K. S. Godwin; G. D. Emmitt; S. Greco

2012-08-01T23:59:59.000Z

160

Access Grid | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Access Grid Access Grid Access Grid The Access Grid is the ensemble of resources that can be used to support human interaction across the grid. It consists of multimedia display, presentation and interactive environments, interfaces to grid middleware, and interfaces to visualization environments. The Access Grid will support large-scale distributed meetings, collaborative work sessions, seminars, lectures, tutorials and training. The Access Grid design point is group-to-group communication (thus differentiating it from desktop to desktop based tools that focus on individual communication). The Access Grid environment must enable both formal and informal group interactions. Large-format displays integrated with intelligent or active meeting rooms are a central feature of the Access Grid nodes. Access Grid nodes are

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Impact of Ice Crystal Roughness on Satellite Retrieved Cloud Properties  

NLE Websites -- All DOE Office Websites (Extended Search)

Ice Crystal Roughness on Satellite Retrieved Cloud Properties Ice Crystal Roughness on Satellite Retrieved Cloud Properties P. Minnis 1 , P. W. Heck 2 , R. F. Arduini 3 , R. Palikonda 3 , J. K. Ayers 3 , M. M. Khaiyer 3 , P. Yang 4 , Y. Xie 4 3 Science Systems & Applications, Inc. Hampton, VA 1 NASA Langley Research Center Hampton, VA Current Cirrus Models Inadequate Cirrus cloud optical depths Ï„ (heights z e ) are often over (under) estimated when derived from solar reflectances. In situ data suggest smaller asymmetry factors, g, than used in most retrieval models. Multi-angle measurements point to smoother phase functions than for solid, smooth xtals. Calculations show that solid crystals with roughened facets or embedded bubbles --both observed in real cirrus particles-- yield smoother phase functions & smaller g

162

Heat transfer between elastic solids with randomly rough surfaces  

E-Print Network (OSTI)

We study the heat transfer between elastic solids with randomly rough surfaces. We include both the heat transfer from the area of real contact, and the heat transfer between the surfaces in the noncontact regions. We apply a recently developed contact mechanics theory, which accounts for the hierarchical nature of the contact between solids with roughness on many different length scales. For elastic contact, at the highest (atomic) resolution the area of real contact typically consists of atomic (nanometer) sized regions, and we discuss the implications of this for the heat transfer. For solids with very smooth surfaces, as is typical in many modern engineering applications, the interfacial separation in the non-contact regions will be very small, and for this case we show the importance of the radiative heat transfer associated with the evanescent electromagnetic waves which exist outside of all bodies.

B. N. J. Persson; B. Lorenz; A. I. Volokitin

2009-08-27T23:59:59.000Z

163

Specification of Surface Roughness for Hydraulic Flow Test Plates  

Science Conference Proceedings (OSTI)

A study was performed to determine the surface roughness of the corrosion layer on aluminum clad booster fuel plates for the proposed Gas Test Loop (GTL) system to be incorporated into the Advanced Test Reactor (ATR) at the Idaho National Laboratory. A layer of boehmite (a crystalline, non-porous gamma-alumina hydrate) is typically pre-formed on the surface of the fuel cladding prior to exposure to reactor operation to prevent the uncontrolled buildup of corrosion product on the surface. A representative sample coupon autoclaved with the ATR driver fuel to produce the boehmite layer was analyzed using optical profilometry to determine the mean surface roughness, a parameter that can have significant impact on the coolant flow past the fuel plates. This information was used to specify the surface finish of mockup fuel plates for a hydraulic flow test model. The purpose of the flow test is to obtain loss coefficients describing the resistance of the coolant flow paths, which are necessary for accurate thermal hydraulic analyses of the water-cooled booster fuel assembly. It is recommended that the surface roughness of the boehmite layer on the fuel cladding be replicated for the flow test. While it is very important to know the order of magnitude of the surface roughness, this value does not need to be matched exactly. Maintaining a reasonable dimensional tolerance for the surface finish on each side of the 12 mockup fuel plates would ensure relative uniformity in the flow among the four coolant channels. Results obtained from thermal hydraulic analyses indicate that ±15% deviation from a surface finish (i.e., Ra) of 0.53 ìm would have a minimal effect on coolant temperature, coolant flow rate, and fuel temperature.

Donna Post Guillen; Timothy S. Yoder

2006-05-01T23:59:59.000Z

164

Effect of Grit Blasting on Substrate Roughness and Coating Adhesion  

Science Conference Proceedings (OSTI)

Statistically designed experiments were performed to compare the surface roughnesses produced by grit blasting A36/1020 steel with different abrasives. Grit blast media, blast pressure, and working distance were varied using a Box-type statistical design of experiment (SDE) approach. The surface textures produced by four metal grits (HG16, HG18, HG25, and HG40) and three conventional grits (copper slag, coal slag, and chilled iron) were compared. Substrate roughness was measured using surface profilometry and correlated with operating parameters. The HG16 grit produced the highest surface roughness of all the grits tested. Aluminum and zinc-aluminum coatings were deposited on the grit-blasted substrates using a Twin-Wire Electric Arc (TWEA) process. Bond strength of the coatings was measured with a portable adhesion tester in accordance with ASTM standard D4541. The coatings on substrates roughened with steel grit exhibit superior bond strength to those on substrates prepared with conventional grit. For aluminum coatings sprayed onto surfaces prepared with the HG16 grit, the bond strength was most influenced by current, spray distance, and spray gun pressure (in that order). The highest bond strength for the zinc-aluminum coatings was attained on surfaces prepared using the metal grits.

Dominic Varacalle; Donna Guillen; Doug Deason; William Rhodaberger; Elliott Sampson

2006-09-01T23:59:59.000Z

165

Foam flow through a transparent rough-walled rock fracture  

SciTech Connect

This paper presents an experimental study of nitrogen, water, and aqueous foam flow through a transparent replica of a natural rough-walled rock fracture with a hydraulic aperture of roughly 30 {mu}m. It is established that single-phase flow of both nitrogen and water is well described by analogy to flow between parallel plates. Inertial effects caused by fracture roughness become important in single-phase flow as the Reynolds number approaches 1. Foam exhibits effective control of gas mobility. Foam flow resistances are approximately 10 to 20 times greater than those of nitrogen over foam qualities spanning from 0.60 to 0.99 indicating effective gas-mobility control. Because previous studies of foam flow have focused mainly upon unfractured porous media, little information is available about foam flow mechanisms in fractured media. The transparency of the fracture allowed flow visualization and demonstrated that foam rheology in fractured media depends upon bubble shape and size. Changes in flow behavior are directly tied to transitions in bubble morphology.

Kovscek, A.; Tretheway, D.; Radke, C. [and others

1995-07-01T23:59:59.000Z

166

Applicability of digital terrain analyses to wind energy prospecting and siting  

DOE Green Energy (OSTI)

The recent publication of the Digital Elevation Model (DEM) database by the US Geological Survey (USGS) has provided a unique opportunity for the development of cost-effective wind energy prospecting technology. This database contains terrain elevation values on a Latitude-Longitude grid with a resolution of 3 arc-seconds (about 90 m) for the contiguous United States, Hawaii, and Puerto Rico. This database has been coupled with software that will produce shaded-relief maps on a laser printer in a format compatible with the state wind power maps in the US wind energy atlas. By providing a much higher resolution of the terrain features than was possible when the US atlas was prepared, these maps can be useful in general wind prospecting activities. As highly resolved as the 90-m DEM data seem to be when compared to the atlas grid, they still appear to be too coarse to resolve terrain features in the detail required for local wind flow characterization and wind plant layout. Gridded terrain data at about 10-m resolution are available from the USGS for some areas of the United States. In areas where these data are unavailable, they may be generated by digitizing and gridding the contours from a 1:24,000-scale USGS map over the area of interest. Comparisons of terrain profiles from cross sections of the 10-m and 90-m data provide an indication of the effect of resolution on the reliability of terrain feature representation. Oblique views of the terrain in shaded-relief format provide a dramatic enhancement of the shape and relative position of features of interest.

Wendell, L.L.; Gower, G.L.; Birn, M.B. [Pacific Northwest Lab., Richland, WA (United States); Castellano, C.C. [USDOE, Washington, DC (United States)

1993-07-01T23:59:59.000Z

167

VEHICLE ACCESS PORTALS  

NLE Websites -- All DOE Office Websites (Extended Search)

East Jemez Road (Map 1) East Jemez Road (Map 1) VEHICLE ACCESS PORTALS Traffic Lane 1: Closed except for emergencies and maintenance operations. Traffic Lanes 2-7: Drivers required to stop and present LANL badges or other form of valid identification to Protective Force officers. Drivers may proceed upon direction of the officers. Note: Commercial delivery vehicle drivers must also pres- ent their inspection passes from Post 10. More Information: spp-questions@lanl.gov Non-work Hours Vehicles entering LANL at the East Jemez VAPs during non-work hours (between 7

168

ARCS – Access Rate Control System  

protected steel housing. ... Access Rate Control System This rugged, maintenance- ... Y-12 is seeking an industry partner to fully com-

169

Topic: Emergency Egress and Access  

Science Conference Proceedings (OSTI)

Topic: Emergency Egress and Access. Fire Research Seminar Series. NIST WTC Recommendations Are Basis for New Set of Revised Codes. ...

2012-08-20T23:59:59.000Z

170

Open Access Transmission Tariff  

NLE Websites -- All DOE Office Websites (Extended Search)

Transmission | OATT Transmission | OATT Skip Navigation Links Transmission Functions Infrastructure projects Interconnection OASIS OATT Western Open Access Transmission Service Tariff Revision Western Area Power Administration submitted its revised Open Access Transmission Service Tariff with the Federal Energy Regulatory Commission on Sept. 30, 2009. The tariff became effective on Dec. 1, 2009, as modified by Western's March 2, 2011 compliance filing. The revised tariff was developed to comply with FERC Order No. 890 and to be consistent with Western's statutory and regulatory requirements. It addresses changes in transmission services and planning. FERC issued an order on Dec. 2, 2010, granting Western's petition for a Declaratory Order approving the tariff as an acceptable reciprocity tariff, subject to Western making a compliance filing within 30 days to address items in Attachment C, Attachment P and Attachment Q. Western made its compliance filing on March 2, 2010, addressing FERC's Dec. 2, 2010, order. FERC accepted Western's March 2, 2011 compliance filing on April 25, 2011. Western has made several ministerial filings to its OATT as part of FERC's eTariff viewer system, the last of these was approved on March 29, 2013. Further detail can be found in the links below.Current OATT

171

NSLS User Access | Training  

NLE Websites -- All DOE Office Websites (Extended Search)

Training Training Training for New Users and Users with Expired Training and/or Badges: All new users and users with expired badges must complete or update the training modules shown below prior to access to the experimental floor. The training can be completed online prior to arrival at the NSLS and is strongly recommended to save considerable time during check-in at the Guest, User, Visitor (GUV) Center in Building 400. Please note each training module is followed by an exam which asks for your name and guest number. If you do not already have a guest number, leave this entry blank. All new users and users with expired badges MUST arrive on a weekday (no weekends or holidays) and check in at the GUV Center so that your training can be verified and to receive a photo ID badge (new or updated). The GUV

172

Template Discontinuation Access  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

FOR SUBJECT FOR SUBJECT FROM: Personnel Security Program Manager SUBJECT: Discontinuation of Access Eligibility Determination Reference is made to your Questionnaire for National Security Positions signed on [insert date], which was forwarded to this office in connection with a Department of Energy security clearance request. A review of that form disclosed recent use of illegal drugs. [Insert a brief description of the circumstances such as: Specifically, you listed marijuana use 1 time in 5/02; 1 time in 2/03; and 1 time in 3/07.] This office has discontinued the personnel security processing of your security clearance due to your illegal drug usage within twelve months of the signing of your security clearance application.

173

Enhancing evolutionary instance selection algorithms by means of fuzzy rough set based feature selection  

Science Conference Proceedings (OSTI)

In recent years, fuzzy rough set theory has emerged as a suitable tool for performing feature selection. Fuzzy rough feature selection enables us to analyze the discernibility of the attributes, highlighting the most attractive features in the construction ... Keywords: Evolutionary algorithms, Feature selection, Instance selection, Nearest neighbor, Rough sets

Joaquín Derrac; Chris Cornelis; Salvador García; Francisco Herrera

2012-03-01T23:59:59.000Z

174

Research on operating parameters and energy consumption of cold store based on rough set theory  

Science Conference Proceedings (OSTI)

Rough set theory is applied to analyze the energy consumption of an industrial cold storage facility for the first time. The features of rough set theory in data extraction are analyzed. The operating parameters collected in a sample refrigerating plant ... Keywords: cold store, energy consumption, operating parameters, rough set

Jianyi Zhang; Ying Xu; Fei Chen

2009-08-01T23:59:59.000Z

175

The modified Beckmann-Kirchhoff scattering theory for rough surface analysis  

Science Conference Proceedings (OSTI)

This paper focusses on how reflectance models based on scattering theory and reported in the physics literature can be used for making estimates of surface roughness parameters using reflectance measurements obtained with a digital camera. We commence ... Keywords: BRDF measurements, Beckmann model, Physics-based reflectance models, Rough surface scattering, Roughness estimation

Hossein Ragheb; Edwin R. Hancock

2007-07-01T23:59:59.000Z

176

Evaluating Satellite-Based Cloud Persistence and Displacement Nowcasting Techniques over Complex Terrain  

Science Conference Proceedings (OSTI)

The Moderate Resolution Imaging Spectroradiometer (MODIS) sensor aboard the Terra and Aqua satellites allows roughly for the same region of Earth to be sampled twice in a nowcasting time frame. Using the MODIS cloud mask at 5-km resolution and ...

Eric M. Guillot; Thomas H. Vonder Haar; John M. Forsythe; Steven J. Fletcher

2012-04-01T23:59:59.000Z

177

The apparent surface roughness of moving sand transported by wind  

E-Print Network (OSTI)

We present a comprehensive analytical model of aeolian sand transport in saltation. It quantifies the momentum transfer from the wind to the transported sand by providing expressions for the thickness of the saltation layer and the apparent surface roughness. These expressions are for the first time entirely derived from basic physical principles. The model further predicts the sand transport rate (mass flux) and the impact threshold shear velocity. We show that the model predictions are in very good agreement with experiments and numerical state of the art simulations of aeolian saltation.

Thomas Pähtz; Jasper F. Kok; Hans J. Herrmann

2011-11-05T23:59:59.000Z

178

Rough Rock, Arizona: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Rock, Arizona: Energy Resources Rock, Arizona: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 36.4072229°, -109.8728929° 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":36.4072229,"lon":-109.8728929,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

179

REMOTE ACCESS SERVICES | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

REMOTE ACCESS SERVICES REMOTE ACCESS SERVICES REMOTE ACCESS SERVICES Access the information you need... Anywhere. Anytime. Different service providers within the Department offer remote access services based on your specific work requirements. If you need assistance, please contact your individual service provider. Energy IT Services (EITS) Remote Access Services Outlook Web Access RSA Token Login RSA Token Instructions HSPD-12 Login HSPD-12 Badge Instructions Virtual Private Network Instructions Citrix Workplace Instructions Energy Information Administration (EIA) Remote Access Services Outlook Web Access EIA VPN Office of Intelligence and Counterintelligence (IN) Remote Access Services Outlook Web Access Office of Science (SC) Remote Access Services Citrix Workplace Help for EITS Customers

180

Furman University OPEN ACCESS PLUS MEDICAL  

E-Print Network (OSTI)

Furman University OPEN ACCESS PLUS MEDICAL BENEFITS ­ Core Plan OPEN ACCESS PLUS MEDICAL BENEFITS ............................................................................................................................................11 Open Access Plus Medical Benefits

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Influence of roughness on near-field heat transfer between two plates  

E-Print Network (OSTI)

The surface roughness correction to the near-field heat transfer between two rough bulk materials is discussed by using second-order perturbation theory. The results allow for estimating the impact of surface roughness to the heat transfer in recent experiments between two plates and between a microsphere and a plate (using the Derjaguin approximation). Furthermore, we show that the proximity approximation for describing rough surfaces is valid for distances much smaller than the correlation length of the surface roughness even if the heat transfer is dominated by the coupling of surface modes.

Svend-Age Biehs; Jean-Jacques Greffet

2011-03-11T23:59:59.000Z

182

File:Wind rough example.pdf | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search File Edit History Facebook icon Twitter icon » File:Wind rough example.pdf Jump to: navigation, search File File history File usage Metadata File:Wind rough example.pdf Size of this preview: 776 × 600 pixels. Go to page 1 2 Go! next page → next page → Full resolution ‎(1,650 × 1,275 pixels, file size: 196 KB, MIME type: application/pdf, 2 pages) File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 18:03, 2 January 2014 Thumbnail for version as of 18:03, 2 January 2014 1,650 × 1,275, 2 pages (196 KB) Foteri (Talk | contribs) Category:Wind for Schools Portal CurriculaCategory:Wind for Schools Elementary School Curricula

183

Crack Surface Roughness in Three-Dimensional Random Fuse Networks  

SciTech Connect

Using large system sizes with extensive statistical sampling, we analyze the scaling properties of crack roughness and damage profiles in the three-dimensional random fuse model. The analysis of damage profiles indicates that damage accumulates in a diffusive manner up to the peak load, and localization sets in abruptly at the peak load starting from a uniform damage landscape. The global crack width scales as $W \\sim L^{0.5}$ and is consistent with the scaling of localization length $\\xi \\sim L^{0.5}$ used in the data collapse of damage profiles in the post-peak regime. This consistency between the global crack roughness exponent and the post-peak damage profile localization length supports the idea that the post-peak damage profile is predominantly due to the localization produced by the catastrophic failure, which at the same time results in the formation of the final crack. Finally, the crack width distributions can be collapsed for different system sizes and follow a log-normal distribution.

Nukala, Phani K [ORNL; Zapperi, Stefano [University of La Sapienza, Rome; Simunovic, Srdjan [ORNL

2006-01-01T23:59:59.000Z

184

Laboratory Access | Sample Preparation Laboratories  

NLE Websites -- All DOE Office Websites (Extended Search)

Access Access Planning Ahead Planning Ahead Please complete the Beam Time Request (BTR) and Support Request forms thourgh the User Portal. Thorough chemical and sample information must be included in your BTR. Support Request forms include a list of collaborators that require laboratory access and your group's laboratory equipment requests. Researcher safety is taken seriously at SLAC. Please remember that radioactive materials, nanomaterials, and biohazardous materials have additional safety requirements. Refer to the SSRL or LCLS Safety Offices for further guidance. Upon Arrival Upon Arrival Once you arrive you must complete training and access forms before accessing the Sample Preparation Laboratories (SPL). All Sample Prep Lab doors are locked with access key codes. Once your SPL

185

Optical access port  

DOE Patents (OSTI)

A 0.025 m diameter optical access port system is provided for a high-pressure (20.4 bars) and high-temperature (538{degrees}C) fixed-bed coal gasification process stream. A pair of proximal channels lead into the pipe containing the process stream with the proximal channels disposed on opposite sides of the pipe and coaxial. A pair of ball valves are attached to respective ends of proximal channels for fluidly closing the respective channels in a closed position and for providing a fluid and optical aperture in an open position. A pair of distal channels are connected to respective ball valves. These distal channels are also coaxial with each other and with the proximal channels. Each distal channel includes an optical window disposed therein and associated sealing gaskets. A purge gas is introduced into each distal channel adjacent a respective optical window. The purge gas is heated by a heater before entry into the distal channels. Preferably the optical windows are made of fused silica and the seals are Grafoil gaskets which are pressed against the optical window. 3 figs.

Lutz, S.A.; Anderson, R.J.

1988-09-14T23:59:59.000Z

186

Access Control Policy Tool (ACPT)  

Science Conference Proceedings (OSTI)

... In regard to cyber security, privacy, and information sharing, access control is one of the crucial elements in protecting the nation's critical IT ...

2013-01-15T23:59:59.000Z

187

Foreign National Access Request Form  

NLE Websites -- All DOE Office Websites (Extended Search)

will be allowed access to the ANL facility prior to approval by the Security and Counterintelligence Division. The visitor must have a valid passport and visa (or supplemental...

188

Science Open Access Journals - About  

Office of Scientific and Technical Information (OSTI)

SOAJ allows the user to search multiple open access publications with a single query. The query is sent simultaneously to each individual database searched by SOAJ,...

189

A High-Resolution Air Pollution Model Suitable for Dispersion Studies in Complex Terrain  

Science Conference Proceedings (OSTI)

The development of an air pollution transport model that uses an expanding terrain-following coordinate with high resolution in analytic form near the surface and a high-order accurate transport algorithm is described. The model is designed to be ...

Ming Liu; John J. Carroll

1996-10-01T23:59:59.000Z

190

Modeling of Summertime Flow and Dispersion in the Coastal Terrain of Southeastern Australia  

Science Conference Proceedings (OSTI)

The Latrobe Valley is situated in a coastal region of complex terrain in southeastern Australia. During typical summertime conditions of light synoptic winds and clear skies, the low-level regional wind field is dominated by sea-breeze and slope-...

William L. Physick; Deborah J. Abbs

1991-04-01T23:59:59.000Z

191

An Experimental Investigation on the Wake Interference of Wind Turbines Sited Over Complex Terrains  

E-Print Network (OSTI)

1 An Experimental Investigation on the Wake Interference of Wind Turbines Sited Over Complex, 50011 An experimental study was conducted to investigate the interferences of wind turbines sited over conducted in a large wind tunnel with of wind turbine models sited over a flat terrain (baseline case

Hu, Hui

192

Procedural Reproduction of Terrain Textures with Geographic Data Carsten Dachsbacher1,3  

E-Print Network (OSTI)

. As a consequence the native instructions of a GPU's pixel shader allow a very simple imple- mentation. The procedural model is imple- mented as vertex and fragment shaders and entirely executed on graphics hardware Textures for Terrain Rendering. In Shader X4 (2005), Charles River Media. [Fai05] FAIRCLOUGH M.: Terragen v

Bolch, Tobias

193

Dynamical Downscaling of Wind Speed in Complex Terrain Prone To Bora-Type Flows  

Science Conference Proceedings (OSTI)

The results of numerically modeled wind speed climate, a primary component of wind energy resource assessment in the complex terrain of Croatia, are given. For that purpose, dynamical downscaling of 10 yr (1992–2001) of the 40-yr ECMWF Re-Analysis ...

Kristian Horvath; Alica Baji?; Stjepan Ivatek-Šahdan

2011-08-01T23:59:59.000Z

194

On the Laws of Geostrophic Drag and Heat Transfer over a Slightly Inclined Terrain  

Science Conference Proceedings (OSTI)

Analytical solutions of a set of equations that couples the Ekman boundary layer and the Prandtl slope wind equations are presented for terrain inclinations with an upper limit of 0.2. With the aid of the logarithmic asymptotes for wind and ...

Lev N. Gutman; JoséW. Melgarejo

1981-08-01T23:59:59.000Z

195

A Flash-Flooding Storm at the Steep Edge of High Terrain: Disaster in the Himalayas  

Science Conference Proceedings (OSTI)

Flash floods on the edge of high terrain, such as the Himalayas or Rocky Mountains, are especially dangerous and hard to predict. The Leh flood of 2010 at the edge of the Himalayan Plateau in India is an example of the tragic consequences of such storms. ...

Kristen L. Rasmussen; Robert A. Houze Jr.

2012-11-01T23:59:59.000Z

196

Electric Utility Terrain Vehicle Demonstration at a Military Base in Florida  

Science Conference Proceedings (OSTI)

Non-road electric vehicles such as lift trucks, airport ground support equipment and underground mining vehicles have proven themselves in the marketplace. However, heavy-duty utility-terrain vehicles (UTVs) powered exclusively by electricity have been introduced only recently. To test the capabilities of electric UTVs, two demonstration vehicles were instrumented for data acquisition and placed in ...

2013-07-31T23:59:59.000Z

197

Sink placement on a 3D terrain for border surveillance in wireless sensor networks  

Science Conference Proceedings (OSTI)

With their distributed nature and redundant operation capability, wireless sensor networks are very suitable for border surveillance scenarios that track intruders trying to breach to a safe side. In such scenarios, keeping the operation going on for ... Keywords: Border surveillance, Discrete event simulation, Genetic algorithms, Sink placement, Three dimensional terrain, Wireless sensor networks

Rabun Kosar; Cem Ersoy

2012-02-01T23:59:59.000Z

198

Furman University OPEN ACCESS PLUS MEDICAL  

E-Print Network (OSTI)

8:54 AM Furman University OPEN ACCESS PLUS MEDICAL BENEFITS ­ Basic Plan OPEN ACCESS PLUS MEDICAL ...................................................................................................................................................10 Open Access Plus Medical Benefits Basic Plan ...............................................................................................................................................................12 Open Access Plus Medical Benefits Core Plan

199

Internal Controls Over Sensitive Compartmented Information Access...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Controls Over Sensitive Compartmented Information Access for Selected Field Intelligence Elements, IG-0796 Internal Controls Over Sensitive Compartmented Information Access...

200

Water infiltration and intermittent flow in rough-walled fractures  

DOE Green Energy (OSTI)

Flow visualization experiments were conducted in transparent replicas of natural rough-walled fractures. The fracture was inclined to observe the interplay between capillary and gravity forces. Water was introduced into the fracture by a capillary siphon. Preferential flow paths were observed, where intermittent flow frequently occurred. The water infiltration experiments suggest that intermittent flow in fractures appears to be the rule rather than the exception. In order to investigate the mechanism causing intermittent flow in fractures, parallel plates with different apertures were assembled using lucite and glass. A medium-coarse-fine pore structure is believed to cause the intermittency in flow. Intermittent flow was successfully produced in the parallel plate experiments using the lucite plates. After several trials, intermittent flow was also produced in the glass plates.

Su, G.

1995-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Visual Terrain Mapping for Mars Exploration1,2 0-7803-8155-6/04/$17.00 2004 IEEE  

E-Print Network (OSTI)

1 Visual Terrain Mapping for Mars Exploration1,2 1 0-7803-8155-6/04/$17.00© 2004 IEEE 2 IEEEAC. The techniques used include wide-baseline stereo mapping for terrain distant from the rover, bundle adjustment images. However, current rover technologies do not allow rovers to autonomously navigate to distant

Li, Rongxing Â?RonÂ?

202

Effects of the roughness characteristics on the wire tool surface for the electrical discharge machining properties  

Science Conference Proceedings (OSTI)

Wire electrical discharge machining (WEDM) has been investigated to obtain the better discharge machining properties of the removal rate and the surface roughness in a few decades. Recently, it revealed that the rough tool electrodes can improve the WEDM properties for some sort of materials. In this study, the rough wire electrodes using a wet blasting method was developed and evaluated the machining performance for the insulated Si{sub 3}N{sub 4} in the WEDM processes. As the results, it could not recognize the advantage of roughness wire electrode under the high-energy condition, but it found that the electro-conductive layer thickness became thinner in comparison with those of normal wires. On the contrary, it could be obtained the better surface roughness in the low energy condition. It was supposed that the roughed wire surface generates the homogeneous dispersion discharges on the workpiece.

Fukuzawa, Yasushi; Yamashita, Masahide; Mamuro, Hiroaki; Yamashita, Ken [Nagaoka University of Technology, Department of Mechanical Engineering, 1603-1 Kamitomioka-machi, Nagaoka, Niigata, 940-2188 (Japan); Ogata, Masayoshi [Macoho Co., Ltd. 525 Kanawa, Isurugi-machi, Nagaoka, Niigata 940-2032 JAPAN (Japan)

2011-01-17T23:59:59.000Z

203

Abstract--Face Milling is today the most effective and productive manufacturing method for roughing and finishing large  

E-Print Network (OSTI)

Surface Roughness in Cnc Face Milling of Cobalt-Based Alloy (Stellite 6)", The International Journal

Aristomenis, Antoniadis

204

ROUGH-TOOTHED DOLPHIN (Steno bredanensis): Northern Gulf of Mexico Stock  

E-Print Network (OSTI)

The rough-toothed dolphin is distributed worldwide in tropical to warm temperate waters (Leatherwood and Reeves 1983; Miyazaki and Perrin 1994). Rough-toothed dolphins occur in both oceanic and continental shelf waters in the northern Gulf of Mexico (Fulling et al. 2003; Mullin and Fulling, in review). Rough-toothed dolphins were seen in all seasons during GulfCet aerial surveys of the northern Gulf of Mexico between

Stock Definition; Geographic Range

2003-01-01T23:59:59.000Z

205

The Influence of Groundwater Flow on Thermal Regimes in Mountainous Terrain  

DOE Green Energy (OSTI)

Active circulation of cool groundwater in mountainous terrain can cause an advective disturbance of the thermal regime. This factor complicates interpretation of data collected in geothermal exploration programs. An isothermal free-surface model has been developed which provides qualitative insight into the nature of an advective disturbance as it is affected by topography, permeability and climate. A fully coupled model of fluid and heat transfer is being developed for quantitative study of idealized mountain hydrothermal systems.

Forster, Craig; Smith, Leslie

1986-01-21T23:59:59.000Z

206

Notices Accessible Format: Individuals with  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

472 Federal Register 472 Federal Register / Vol. 77, No. 83 / Monday, April 30, 2012 / Notices Accessible Format: Individuals with disabilities can obtain this document in an accessible format (e.g., braille, large print, audiotape, or computer diskette) on request to the program contact person listed under FOR FURTHER INFORMATION CONTACT. Electronic Access to This Document: The official version of this document is the document published in the Federal Register. Free Internet access to the official edition of the Federal Register and the Code of Federal Regulations is available via the Federal Digital System at: www.gpo.gov/fdsys. At this site you can view this document, as well as all other documents of this Department published in the Federal Register, in text or Adobe Portable Document

207

Network Access to Multimedia Information  

Science Conference Proceedings (OSTI)

This report summarises the requirements of research and academic network users for network access to multimedia information. It does this by investigating some of the projects planned or currently underway in the community. Existing information systems ...

C. Adie

1994-05-01T23:59:59.000Z

208

Categorical Exclusion for Access Road  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Access Road Access Road Improvements along the Pinnacle Peak- Prescott 230-kV Transmission Line between Structures 16813 and 170/1 Yavapai County. Arizona * RECORD OF CATEGORICAL EXCLUSION DETERMINATION A. Proposed Action: Western proposes to improve access roads along a portion of the Pinnacle Peak to Prescott 230-kV Transmission Line (Structures 168/3 and 170/1). which are currently impassable. to maintain worker safety and the reliability of the bulk electric system. Western plans to blade and grade the existing access road where it enters and leaves three washes so that Western's maintenance vehicles can drive across the washes. We will remove dirt from the road prism by starting at wash edges and pulling dirt up slope in order to create ramps with grades suitable for our equipment.

209

XML access control using static analysis  

Science Conference Proceedings (OSTI)

Access control policies for XML typically use regular path expressions such as XPath for specifying the objects for access-control policies. However such access-control policies are burdens to the query engines for XML documents. To relieve this burden, ... Keywords: Access control, XML, XPath, XQuery, automaton, query optimization, schema, static analysis, value-based access control, view schema

Makoto Murata; Akihiko Tozawa; Michiharu Kudo; Satoshi Hada

2006-08-01T23:59:59.000Z

210

Classical and dominance-based rough sets in the search for genes under balancing selection  

Science Conference Proceedings (OSTI)

Since the time of Kimura’s theory of neutral evolution at molecular level the search for genes under natural selection is one of the crucial problems in population genetics. There exists quite a number of statistical tests designed for it, however, ... Keywords: ATM, BLM, RECQL, WRN, balancing selection, classical rough sets approach, dominance-based rough sets approach, natural selection, neutrality tests

Krzysztof A. Cyran

2010-01-01T23:59:59.000Z

211

Power Transformer Fault Diagnosis Based on Integrated of Rough Set Theory and Evidence Theory  

Science Conference Proceedings (OSTI)

When using chromatography data analysis in diagnosis of power transformer fault, fault information cannot be make full use, which can't effectively discover knowledge hidden in data. In this paper a method integreted of rough set theory and evidence ... Keywords: Rough Set, Evidence Theory, Power Transformer, Fault Diagnosis

Zhou Ai-Hua, Yao Yi, Song Hong, Zeng Xiao-Hui

2013-01-01T23:59:59.000Z

212

A Simple Formula for Estimation of the Roughness Length for Heat Transfer over Partly Vegetated Surfaces  

Science Conference Proceedings (OSTI)

A simple formula for computation of the effective roughness length z0Heff for heat transfer or rather for the parameter kB?1eff [=ln(z0Meff/z0Heff) with z0Meff = roughness length for momentum], which are needed in single-source models for evaluating ...

K. Blümel

1999-06-01T23:59:59.000Z

213

HM-ACCESS Project | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

HM-ACCESS Project HM-ACCESS Project Framework for the Use of Electronic Shipping Papers for the Transport of Hazardous Materials HM-ACCESS Project (Framework for the Use of...

214

2e Carbon Access | Open Energy Information  

Open Energy Info (EERE)

Access Jump to: navigation, search Name 2e Carbon Access Place New York, New York Zip 10280 Sector Carbon Product 2E Carbon Access is an enterprise focused solely on bringing...

215

Near-field heat transfer between a nanoparticle and a rough surface  

E-Print Network (OSTI)

In this work we focus on the surface roughness correction to the near-field radiative heat transfer between a nanoparticle and a material with a rough surface utilizing a direct perturbation theory up to second order in the surface profile. We discuss the different distance regimes for the local density of states above the rough material and the heat flux analytically and numerically. We show that the heat transfer rate is larger than that corresponding to a flat surface at short distances. At larger distances it can become smaller due to surface polariton scattering by the rough surface. For distances much smaller than the correlation length of the surface profile, we show that the results converge to a proximity approximation, whereas in the opposite limit the rough surface can be replaced by an equivalent surface layer.

Svend-Age Biehs; Jean-Jacques Greffet

2011-03-11T23:59:59.000Z

216

NBP RFI: Data Access | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Access NBP RFI: Data Access Neustar, Inc. ("Neustar") hereby submits comments in response to the captioned Request for Information ("RFI") of the Department of Energy ("DOE"). The...

217

International Electricity Trade - Open Access | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

International Electricity Trade - Open Access International Electricity Trade - Open Access DOE has consistently expressed its policy that international electricity trade should be...

218

Remote Access of Computer Controlled Experiments.  

E-Print Network (OSTI)

??In this paper, we present a way for students to access and operate laboratory equipment, controlled by a laboratory computer via a remote access program.… (more)

Nilsson, Kristian; Zackrisson, Johan

2008-01-01T23:59:59.000Z

219

Surface Energy Balance of the Western and Central Canadian Subarctic: Variations in the Energy Balance among Five Major Terrain Types  

Science Conference Proceedings (OSTI)

In this study, the surface energy balance of 10 sites in the western and central Canadian subarctic is examined. Each research site is classified into one of five terrain types (lake, wetland, shrub tundra, upland tundra, and coniferous forest) ...

Andrea K. Eaton; Wayne R. Rouse; Peter M. Lafleur; Philip Marsh; Peter D. Blanken

2001-09-01T23:59:59.000Z

220

Analysis of WRF Model Wind Estimate Sensitivity to Physics Parameterization Choice and Terrain Representation in Andalusia (Southern Spain)  

Science Conference Proceedings (OSTI)

This paper reports on an evaluation of the relative roles of choice of parameterization scheme and terrain representation in the Weather Research and Forecasting (WRF) mesoscale model, in the context of a regional wind resource assessment. As a ...

F. J. Santos-Alamillos; D. Pozo-Vázquez; J. A. Ruiz-Arias; V. Lara-Fanego; J. Tovar-Pescador

2013-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Radar-Based Quantitative Precipitation Estimation for the Cool Season in Complex Terrain: Case Studies from the NOAA Hydrometeorology Testbed  

Science Conference Proceedings (OSTI)

This study explores error sources of the National Weather Service operational radar-based quantitative precipitation estimation (QPE) during the cool season over the complex terrain of the western United States. A new, operationally geared radar ...

Jian Zhang; Youcun Qi; David Kingsmill; Kenneth Howard

2012-12-01T23:59:59.000Z

222

Isobaric Height Perturbations Associated with Mountain Waves Measured by Aircraft during the Terrain-Induced Rotor Experiment  

Science Conference Proceedings (OSTI)

It has only been in the last few years that accurate measurement of the horizontal pressure gradient has been possible over complex terrain using an airborne platform. To infer forcing mechanisms for the wind, an independent measure of the height ...

Thomas R. Parish; Larry D. Oolman

2012-12-01T23:59:59.000Z

223

An Intense, Quasi-Steady Thunderstorm over Mountainous Terrain. Part II: Doppler Radar Observations of the Storm Morphological Structure  

Science Conference Proceedings (OSTI)

An analysis of an intense, quasi-steady thunderstorm which developed over mountainous terrain is presented. This storm, extensively analyzed using multiple Doppler radar and surface mesonet data, formed within an environment having strong low-...

Kevin R. Knupp; William R. Cotton

1982-02-01T23:59:59.000Z

224

Examination of Errors in Near-Surface Temperature and Wind from WRF Numerical Simulations in Regions of Complex Terrain  

Science Conference Proceedings (OSTI)

The performance of an advanced research version of the Weather Research and Forecasting Model (WRF) in predicting near-surface atmospheric temperature and wind conditions under various terrain and weather regimes is examined. Verification of 2-m ...

Hailing Zhang; Zhaoxia Pu; Xuebo Zhang

2013-06-01T23:59:59.000Z

225

Evaluation of Turbulence Closure Models for Large-Eddy Simulation over Complex Terrain: Flow over Askervein Hill  

Science Conference Proceedings (OSTI)

The evaluation of turbulence closure models for large-eddy simulation (LES) has primarily been performed over flat terrain, where comparisons with theory and observations are simplified. The authors have previously developed improved closure ...

Fotini Katopodes Chow; Robert L. Street

2009-05-01T23:59:59.000Z

226

A Model Study of the Stably Stratified Steady-State Atmospheric Boundary Layer over a Slightly Inclined Terrain  

Science Conference Proceedings (OSTI)

A simple, steady-state, numerical model is used to examine the Rossby-number similarity theory of the atmospheric boundary layer over a slightly inclined terrain. The model confirms the similarity predictions. The slope-influenced universal ...

Zbigniew Sorbjan

1984-06-01T23:59:59.000Z

227

An Immersed Boundary Method Enabling Large-Eddy Simulations of Flow over Complex Terrain in the WRF Model  

Science Conference Proceedings (OSTI)

This paper describes a three-dimensional immersed boundary method (IBM) that facilitates the explicit resolution of complex terrain within the Weather Research and Forecasting (WRF) model. Two interpolation methods—trilinear and inverse distance ...

Katherine A. Lundquist; Fotini Katopodes Chow; Julie K. Lundquist

2012-12-01T23:59:59.000Z

228

A Method for Imposing Surface Stress and Heat Flux Conditions in Finite-Difference Models with Steep Terrain  

Science Conference Proceedings (OSTI)

A numerical implementation of the surface stress boundary condition is presented for finite-difference models in which the terrain slope and curvature cannot necessarily be considered small. The method involves reducing the discretized stress ...

C. C. Epifanio

2007-03-01T23:59:59.000Z

229

High-Resolution Large-Eddy Simulations of Scalar Transport in Atmospheric Boundary Layer Flow over Complex Terrain  

Science Conference Proceedings (OSTI)

This paper presents high-resolution numerical simulations of the atmospheric flow and concentration fields accompanying scalar transport and diffusion from a point source in complex terrain. Scalar dispersion is affected not only by mean flow, ...

Takenobu Michioka; Fotini Katopodes Chow

2008-12-01T23:59:59.000Z

230

Modeling Wind Field and Pollution Transport over a Complex Terrain Using an Emergency Dose Information Code SPEEDI  

Science Conference Proceedings (OSTI)

Atmospheric dispersion code system SPEEDI (System for Prediction of Environmental Emergency Dose Information) has been applied to simulate the field experiments conducted over a complex terrain. A diagnostic mass-consistent wind field model of ...

R. Venkatesan; M. Möllmann-Coers; A. Natarajan

1997-09-01T23:59:59.000Z

231

Adding Complex Terrain and Stable Atmospheric Condition Capability to the Simulator for On/Offshore Wind Farm Applications (SOWFA) (Presentation)  

DOE Green Energy (OSTI)

This presentation describes changes made to NREL's OpenFOAM-based wind plant aerodynamics solver so that it can compute the stably stratified atmospheric boundary layer and flow over terrain. Background about the flow solver, the Simulator for Off/Onshore Wind Farm Applications (SOWFA) is given, followed by details of the stable stratification/complex terrain modifications to SOWFA, along with some preliminary results calculations of a stable atmospheric boundary layer and flow over a simple set of hills.

Churchfield, M. J.

2013-06-01T23:59:59.000Z

232

Adding Complex Terrain and Stable Atmospheric Condition Capability to the Simulator for On/Offshore Wind Farm Applications (SOWFA) (Presentation)  

SciTech Connect

This presentation describes changes made to NREL's OpenFOAM-based wind plant aerodynamics solver so that it can compute the stably stratified atmospheric boundary layer and flow over terrain. Background about the flow solver, the Simulator for Off/Onshore Wind Farm Applications (SOWFA) is given, followed by details of the stable stratification/complex terrain modifications to SOWFA, along with some preliminary results calculations of a stable atmospheric boundary layer and flow over a simple set of hills.

Churchfield, M. J.

2013-06-01T23:59:59.000Z

233

Final Report of the Grant: ''Vertical Transport and Mixing in Complex Terrain Airsheds''  

SciTech Connect

Stable stratification associated with nocturnal thermal circulation in areas of complex terrain leads to interesting and important phenomena that govern local meteorology and contaminant dispersion. Given that most urban areas are in complex topography, understanding and prediction of such phenomena are of immediate practical importance. This project dealt with theoretical, laboratory, numerical and field experimental studies aimed at understanding stratified flow and turbulence phenomena in urban areas, with particular emphasis on flow, turbulence and contaminant transport and diffusion in such flows. A myriad of new results were obtained and some of these results were used to improve the predictive capabilities of the models.

Harindra Joseph Fernando James Anderson Don Boyer Neil Berman

2004-12-29T23:59:59.000Z

234

USRI Admins Accessing USRI Reports  

E-Print Network (OSTI)

button #12;Step 6: Search by Instructor Search Area Enter: Instructors ID; or Instructors full or partC Access Enter the following: User name, and Password with secure ID#s #12;Step 3: Click on the following: Mandatory Parameters Selections Select Term; Select Course Career; Select Releasable Type; Click

Habib, Ayman

235

Flexible access control for javascript  

Science Conference Proceedings (OSTI)

Providing security guarantees for systems built out of untrusted components requires the ability to define and enforce access control policies over untrusted code. In Web 2.0 applications, JavaScript code from different origins is often combined on a ... Keywords: delimited histories, javascript, same-origin policy, security

Gregor Richards, Christian Hammer, Francesco Zappa Nardelli, Suresh Jagannathan, Jan Vitek

2013-10-01T23:59:59.000Z

236

Effects of all-terrain vehicle trails on stream channel characteristics, Ouachita National Forest, Arkansas  

E-Print Network (OSTI)

Research shows that road and trail crossings have negative impacts on forest streams, and that off-road vehicles are detrimental to the environment. However, little information is available concerning the effects of such vehicles on stream channels and riverine environments. This research investigates the effects of all-terrain vehicles (ATVs), one of the many types of off-road vehicles, on stream channel characteristics in the Ouachita National Forest, Arkansas, where the Wolf Pen Gap All-Terrain Vehicle Trail system was built and opened to public use in 1991. Statistical analysis revealed significant differences in stream pool characteristics between the "pristine" control stream (Caney Creek) and those affected by ATV trails (Board Camp Creek and Gap Creek) in the national forest. Pools in Board Camp Creek and Gap Creek were found to have increased amounts of sands and fines, higher values of embeddedness, lower depths, and less volume. These characteristics are consistent with observations that ATV trails are primary sources of sediment input into stream channels. Statistical differences in pool characteristics between streams affected by forest roads (Brushy Creek) and those by ATV trails were also revealed, although forest roads apparently impact streams to a lesser extent than ATV trails. The effects of roads and trails on stream pool characteristics were illustrated using Geographic Information Systems. These findings have important implications for the ecological integrity of stream systems in areas affected by ATV trails. They also contribute potentially valuable information in the management context.

Rohrer, Deven Michelle

2001-01-01T23:59:59.000Z

237

NBP_RFI_Data_Access.PDF | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

NBPRFIDataAccess.PDF NBPRFIDataAccess.PDF NBPRFIDataAccess.PDF More Documents & Publications Silver Spring Networks comments on DOE NBP RFI: Data Access...

238

PIA - Foreign Access Central Tracking System (FACTS) | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Access Central Tracking System (FACTS) PIA - Foreign Access Central Tracking System (FACTS) PIA - Foreign Access Central Tracking System (FACTS) PIA - Foreign Access Central...

239

ETTP Security Access Control System (ESACS) | Department of Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

ETTP Security Access Control System (ESACS) ETTP Security Access Control System (ESACS) ETTP Security Access Control System (ESACS) ETTP Security Access Control System (ESACS) More...

240

Influence of Land Surface Roughness on Atmospheric Circulation and Precipitation: A Sensitivity Study with a General Circulation Model  

Science Conference Proceedings (OSTI)

The influence of land surface roughness on the large scale atmospheric circulation and rainfall was examined by comparing three sets of simulations made with a general circulation model in which the land surface roughness length, z0, was reduced ...

Y. C. Sud; J. Shukla; Y. Mintz

1988-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Ocean Surface Roughness Spectrum in High Wind Condition for Microwave Backscatter and Emission Computations  

Science Conference Proceedings (OSTI)

Ocean surface roughness plays an important role in air–sea interaction and ocean remote sensing. Its primary contribution is from surface waves much shorter than the energetic wave components near the peak of the wave energy spectrum. Field ...

Paul A. Hwang; Derek M. Burrage; David W. Wang; Joel C. Wesson

2013-09-01T23:59:59.000Z

242

Large Eddy Simulation of Internal Boundary Layers Created by a Change in Surface Roughness  

Science Conference Proceedings (OSTI)

Turbulence in a ?-mesoscale internal boundary layer (IBL) formed by a discontinuous change in surface roughness has been investigated using a large eddy simulation (LES) model to explicitly treat turbulent transport. Two cases are examined: a ...

John W. Glendening; Ching-Long Lin

2002-05-01T23:59:59.000Z

243

A Mechanism for Local Dissipation of Internal Tides Generated at Rough Topography  

Science Conference Proceedings (OSTI)

Fine- and micro-structure observations indicate that turbulent mixing is enhanced within O(1) km above rough topography. Enhanced mixing is associated with internal wave breaking and, in many regions of the ocean, has been linked to the breaking ...

Maxim Nikurashin; Sonya Legg

2011-02-01T23:59:59.000Z

244

Roughness Lengths for Momentum and Heat Derived from Outdoor Urban Scale Models  

Science Conference Proceedings (OSTI)

Urban climate experimental results from the Comprehensive Outdoor Scale Model (COSMO) were used to estimate roughness lengths for momentum and heat. Two different physical scale models were used to investigate the scale dependence of the ...

M. Kanda; M. Kanega; T. Kawai; R. Moriwaki; H. Sugawara

2007-07-01T23:59:59.000Z

245

Method for Estimation of Surface Roughness and Similarity Function of Wind Speed Vertical Profile  

Science Conference Proceedings (OSTI)

This study is aimed at identifying and refining a method suitable to estimate the surface roughness length (z0) and the universal similarity function of the wind speed profile (?M) based on ultrasonic anemometer measurements carried out at only ...

Roberto Sozzi; Maurizio Favaron; Teodoro Georgiadis

1998-05-01T23:59:59.000Z

246

On Detection of a Wave Age Dependency for the Sea Surface Roughness  

Science Conference Proceedings (OSTI)

The wave age dependency of the nondimensional sea surface roughness (also called the Charnock parameter) is investigated with data from the new field measurement program at Rødsand in the Danish Baltic Sea. An increasing Charnock parameter with ...

B. Lange; H. K. Johnson; S. Larsen; J. Højstrup; H. Kofoed-Hansen; M. J. Yelland

2004-06-01T23:59:59.000Z

247

Assessment of Roughness Length Schemes Implemented within the Noah Land Surface Model for High Altitude Regions  

Science Conference Proceedings (OSTI)

Current land surface models still have difficulties with producing reliable surface heat fluxes and skin temperature (Tsfc) estimates for high altitude regions, which may be addressed via adequate parameterization of the roughness lengths for ...

Donghai Zheng; Rogier Van Der Velde; Zhongbo Su; Martijn J. Booij; Arjen Y. Hoekstra

248

Ocean Surface Roughness Spectrum in High Wind Condition for Microwave Backscatter and Emission Computations  

Science Conference Proceedings (OSTI)

Ocean surface roughness plays an important role in air-sea interaction and ocean remote sensing. Its primary contribution is from surface waves much shorter than the energetic wave components near the peak of the wave energy spectrum. Field ...

Paul A. Hwang; Derek M. Burrage; David W. Wang; Joel C. Wesson

249

Eddy-Induced Modulation of Turbulent Dissipation over Rough Topography in the Southern Ocean  

Science Conference Proceedings (OSTI)

Mesoscale eddies are universal features of the ocean circulation, yet the processes by which their energy is dissipated remain poorly understood. One hypothesis argues that the interaction of strong geostrophic flows with rough bottom topography ...

J. Alexander Brearley; Katy L. Sheen; Alberto C. Naveira Garabato; David A. Smeed; Stephanie Waterman

2013-11-01T23:59:59.000Z

250

Scintillometer-Based Estimates of Sensible Heat Flux Using Lidar-Derived Surface Roughness  

Science Conference Proceedings (OSTI)

The estimation of sensible heat flux, H, using large aperture scintillometer (LAS) under varying surface heterogeneity conditions was investigated. Surface roughness features characterized by variable topography and vegetation height were ...

Hatim M. E. Geli; Christopher M. U. Neale; Doyle Watts; John Osterberg; Henk A. R. De Bruin; Wim Kohsiek; Robert T. Pack; Lawrence E. Hipps

2012-08-01T23:59:59.000Z

251

Enhancement of vortex induced forces and motion through surface roughness control  

SciTech Connect

Roughness is added to the surface of a bluff body in a relative motion with respect to a fluid. The amount, size, and distribution of roughness on the body surface is controlled passively or actively to modify the flow around the body and subsequently the Vortex Induced Forces and Motion (VIFM). The added roughness, when designed and implemented appropriately, affects in a predetermined way the boundary layer, the separation of the boundary layer, the level of turbulence, the wake, the drag and lift forces, and consequently the Vortex Induced Motion (VIM), and the fluid-structure interaction. The goal of surface roughness control is to increase Vortex Induced Forces and Motion. Enhancement is needed in such applications as harnessing of clean and renewable energy from ocean/river currents using the ocean energy converter VIVACE (Vortex Induced Vibration for Aquatic Clean Energy).

Bernitsas, Michael M. (Saline, MI); Raghavan, Kamaldev (Houston, TX)

2011-11-01T23:59:59.000Z

252

Effects of surface roughness and vortex generators on the LS(1)-0417MOD airfoil  

DOE Green Energy (OSTI)

An 18-inch constant-chord model of the LS(l)-0417MOD airfoil section was tested under two dimensional steady state conditions ate University 7{times}10 Subsonic Wind Tunnel. The objective was to document section lift and moment characteristics model and air flow conditions. Surface pressure data was acquired at {minus}60{degrees} through + 230{degrees} geometric angles of attack, at a nominal 1 million Reynolds number. Cases with and without leading edge grit roughness were investigated. The leading edge mulated blade conditions in the field. Additionally, surface pressure data were acquired for Reynolds numbers of 1.5 and 2.0 million, with and without leading edge grit roughness; the angle of attack was limited to a {minus}20{degrees} to 40{degrees} range. In general, results showed lift curve slope sensitivities to Reynolds number and roughness. The maximum lift coefficient was reduced as much as 29% by leading edge roughness. Moment coefficient showed little sensitivity to roughness beyond 50{degrees} angle of attack, but the expected decambering effect of a thicker boundary layer with roughness did show at lower angles. Tests were also conducted with vortex generators located at the 30% chord location on the upper surface only, at 1 and 1.5 million Reynolds numbers, with and without leading edge grit roughness. In general, with leading edge grit roughness applied, the vortex generators restored 85 percent of the baseline level of maximum lift coefficient but with a more sudden stall break and at a higher angle of attack than the baseline.

Reuss, R.L.; Hoffman, M.J.; Gregorek, G.M. [Ohio State Univ., Columbus, OH (United States)

1995-12-01T23:59:59.000Z

253

Boundary-Layer Receptivity to Three-Dimensional Roughness Arrays on a Swept-Wing  

E-Print Network (OSTI)

On-going efforts to reduce aircraft drag through transition delay focus on understanding the process of boundary-layer transition from a physics-based perspective. For swept-wings subject to transition dominated by a stationary crossflow instability, one of the remaining challenges is understanding how freestream disturbances and surface features such as surface roughness create the initial amplitudes for unstable waves. These waves grow, modify the mean flow and create conditions for secondary instabilities to occur, which in turn ultimately lead to transition. Computational methods that model the primary and secondary instability growth can accurately model disturbance evolution as long as appropriate initial conditions are supplied. Additionally, transition delay using discrete roughness arrays that exploit known sensitivities to surface roughness has been demonstrated in flight and wind tunnel testing; however, inconsistencies in performance from the two test platforms indicate further testing is required. This study uses detailed hotwire boundary-layer velocity scans to quantify the relationship between roughness height and initial disturbance amplitude. Naphthalene flow visualization provides insight into how transition changes as a result of roughness height and spacing. Micron-sized, circular roughness elements were applied near the leading edge of the ASU(67)-0315 model installed at an angle of attack of -2.9 degrees in the Klebanoff-Saric Wind Tunnel. Extensive flow quality measurements show turbulence intensities less than 0.02% over the speed range of interest. A survey of multiple roughness heights for the most unstable and control wavelengths and Reynolds numbers of 2.4 x 10? 2.8 x 10? and 3.2 x 10? was completed for chord locations of 10%, 15% and 20%. When care was taken to measure in the region of linear stability, it was found that the disturbance amplitude varies almost linearly with roughness height. Naphthalene flow visualization indicates that moderate changes in already-low freestream turbulence levels can have a significant impact on transition behavior.

Hunt, Lauren Elizabeth

2011-12-01T23:59:59.000Z

254

SunShot Initiative: Access to Capital  

NLE Websites -- All DOE Office Websites (Extended Search)

Access to Capital to someone by Access to Capital to someone by E-mail Share SunShot Initiative: Access to Capital on Facebook Tweet about SunShot Initiative: Access to Capital on Twitter Bookmark SunShot Initiative: Access to Capital on Google Bookmark SunShot Initiative: Access to Capital on Delicious Rank SunShot Initiative: Access to Capital on Digg Find More places to share SunShot Initiative: Access to Capital on AddThis.com... Concentrating Solar Power Photovoltaics Systems Integration Balance of Systems Reducing Non-Hardware Costs Lowering Barriers Fostering Growth Access to Capital Photo of a room full of people seated in rows with a few standing in the background. Two hands in the crowd are holding up sheets of paper with 'Like'. Participants at the SunShot Summit breakout session "Big and Small Ideas:

255

Simulation of surface roughness during the formation of thermal spray coatings  

SciTech Connect

The formation of a thermal spray coating was analyzed to identify methods to reduce the surface roughness of the coating. A new methodology was developed which uses a string of equally spaced node points to define the shape of the coating surface and to track the shape change as the thermal spray mass is deposited. This allows the calculation of arbitrary shapes for the coating surface which may be very complex. The model simulates the stochastic deposition of a large number of thermal spray droplets, where experimental data is used for the mass flux distribution on the target surface. This data shows that when the thermal spray mass impinges on the target surface, a large fraction of it (over-spray) splashes off the target and is re-deposited with a small spray angle, resulting in a large coating roughness. This analysis was used in a parameter study to identify methods for reducing the coating roughness. Effect of the shape of the profile for the pre-roughened substrate was found to be small. Decreasing the droplet size by a factor of 2 decreased the roughness by 13%. Increasing the spray angle for the over-spray by a factor of 2 decreased the roughness by 50%, and decreasing the amount of over- spray by a factor of 2 decreased the roughness by 51%.

Kanouff, M.P.

1996-07-01T23:59:59.000Z

256

An Access Definition and Query Language : Towards a Unified Access Control Model.  

E-Print Network (OSTI)

??In this work we suggest a meta access control model emulating established access control models by configuration and offering enhanced features like the delegation of… (more)

Sonnenbichler, Andreas

2013-01-01T23:59:59.000Z

257

NBP RFI: Data Access | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Access NBP RFI: Data Access Reply comments from Cleco Power LLC on DOE Request for Information-Implementing the National Broadband Plan by Empowering Customers and the Smart Grid:...

258

Game Accessibility: Enabling Everyone to Play  

Science Conference Proceedings (OSTI)

There is a growing push to make computer games accessible to the disabled. Keywords: Games,Assistive technology,Assistive devices,game developers,games,accessibility,disabilities,disabled,adaptive technology

Lee Garber

2013-06-01T23:59:59.000Z

259

arXiv.org help - Web Accessibility  

NLE Websites -- All DOE Office Websites (Extended Search)

Web Accessibility The arXiv.org web site is designed to work on the largest possible set of browsers and platforms, and to be accessible to users with disabilities. Our web pages...

260

Access Solar Energy LLC | Open Energy Information  

Open Energy Info (EERE)

Access Solar Energy LLC Jump to: navigation, search Name Access Solar Energy LLC Place Park CIty, Utah Zip 84060 Sector Renewable Energy, Solar Product Utah-based developers of...

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Access Control: Policies, Models, and Mechanisms  

Science Conference Proceedings (OSTI)

Access control is the process of mediating every request to resources and data maintained by a system and determining whether the request should be granted or denied. The access control decision is enforced by a mechanism implementing regulations established ...

Pierangela Samarati; Sabrina De Capitani di Vimercati

2000-09-01T23:59:59.000Z

262

Survey of Substation Equipment Access Control Policies  

Science Conference Proceedings (OSTI)

Utility management and control of access to substations and equipment can help prevent not only unauthorized access by outside agents with ill intent, but also erroneous access to, or erroneous operation of, utility equipment by utility personnel.  This report provides the results of an EPRI–sponsored research project to identify how utilities manage access to transmission and distribution substations and equipment. BackgroundThe enhanced ...

2012-11-20T23:59:59.000Z

263

Transmission Access Charge Informational Filing  

E-Print Network (OSTI)

of any new Participating Transmission Owner (“Participating TO”) during the proceeding six months or (2) changes to Transmission Revenue Requirements of any of the Participating TOs. 1 Because the Access Charges are determined through a formula rate mechanism, these semi-annual adjustments take place automatically. In the enclosed informational filing, the ISO is providing notice regarding the updated Access Charges that reflect the charges that will be in effect beginning January 1, 2002 in accordance with the formula rate. The adjusted charges are based on the modified Transmission Revenue Requirements, both High Voltage and Low Voltage as a result of: (1) the Offer of Settlement accepted by the Commission in Pacific Gas & Electric Company’s (“PG&E”) Docket No. ER01-66-000, (2) San Diego Gas and Electric Company’s supplemental surcharge accepted, subject to refund, in Docket No. ER01-3074-000, and (3) the annual adjustment to the Transmission Revenue Balancing Account (“TRBA”) of the Participating TOs. 1 Capitalized terms not otherwise defined herein are defined in the Master Definitions

unknown authors

2001-01-01T23:59:59.000Z

264

Substation Security and Remote Access Implementation Strategies  

Science Conference Proceedings (OSTI)

This project analyzed control system remote access solutions in a side-by-side comparison. Five systems were lab-tested against common functions used by utilities to access and manage electronic control systems. The five vendors’ products met the basic remote access requirements tested.BackgroundElectronic control systems that actuate protective equipment and physical operations in the ...

2012-12-20T23:59:59.000Z

265

A propositional policy algebra for access control  

Science Conference Proceedings (OSTI)

Security-sensitive environments protect their information resources against unauthorized use by enforcing access control mechanisms driven by access control policies. Due to the need to compare, contrast, and compose such protected information resources, ... Keywords: Access control, policy algebra, policy composition, security policy

Duminda Wijesekera; Sushil Jajodia

2003-05-01T23:59:59.000Z

266

Programmer-focused website accessibility evaluations  

Science Conference Proceedings (OSTI)

Suggested methods for conducting website accessibility evaluations have typically focused on the needs of end-users who have disabilities. However, programmers, not people with disabilities, are the end-users of evaluations reports generated by accessibility ... Keywords: accessibility, evaluation, internet, reporting

Chris Law; Julie Jacko; Paula Edwards

2005-10-01T23:59:59.000Z

267

A systematic approach to static access control  

Science Conference Proceedings (OSTI)

The Java Security Architecture includes a dynamic mechanism for enforcing access control checks, the so-called stack inspection process. While the architecture has several appealing features, access control checks are all implemented via dynamic ... Keywords: Type systems, access control, stack inspection

François Pottier; Christian Skalka; Scott Smith

2005-03-01T23:59:59.000Z

268

Mission-Aware Medium Access Control in Random Access Networks  

E-Print Network (OSTI)

We study mission-critical networking in wireless communication networks, where network users are subject to critical events such as emergencies and crises. If a critical event occurs to a user, the user needs to send necessary information for help as early as possible. However, most existing medium access control (MAC) protocols are not adequate to meet the urgent need for information transmission by users in a critical situation. In this paer, we propose a novel class of MAC protocols that utilize available past information as well as current information. Our proposed protocols are mission-aware since they prescribe different transmission decision rules to users in different situations. We show that the proposed protocols perform well not only when the system faces a critical situation but also when there is no critical situation. By utilizing past information, the proposed protocols coordinate transmissions by users to achieve high throughput in the normal phase of operation and to let a user in a critical ...

Park, Jaeok

2009-01-01T23:59:59.000Z

269

Stochastic modeling of random roughness in shock scattering problems: theory and simulations  

Science Conference Proceedings (OSTI)

Random rougness is omnipresent in engineering applications and may often affect performance in unexpected way. Here, we employ synergistically stochastic simulations and second-order stochastic perturbation analysis to study supersonic flow past a wedge with random rough surface. The roughness (of length $d$) starting at the wedge apex is modeled as stochastic process (with zero mean and correlation length $A$) obtained from a new stochastic differential equation. A multi-element probabilistic collocation method (ME-PCM) based on {\\em sparse grids} is employed to solve the stochastic Euler equations while a WENO scheme is used to discretize the equations in two spatial dimensions. The perturbation analysis is used to verify the stochastic simulations and to provide insight for small values of $A$, where stochastic simulations become prohibitively expensive. % We show that the random roughness enhances the lift and drag forces on the wedge beyond the rough region, and this enhancement is proportional to $(d/A)^2$. The effects become more pronounced as the Mach number increases. These results can be used in designing smart rough skins for airfoils for maxiumum lift enhancement at a minimum drag penalty.

Lin, Guang; Su, Chau-Hsing; Karniadakis, George E.

2008-08-01T23:59:59.000Z

270

Regional Weather Prediction with a Model Combining Terrain-following and Isentropic Coordinates. Part I: Model Description  

Science Conference Proceedings (OSTI)

A short-range numerical prediction model, which is part of a real-time 3-h data assimilation and forecast system, is described. The distinguishing feature of the model is the use of terrain-following (?) coordinate surfaces in the lower ...

Rainer Bleck; Stanley G. Benjamin

1993-06-01T23:59:59.000Z

271

Numerical Study of Terrain-Induced Mesoscale Motions and Hydrostatic Form Drag in a Heated, Growing Mixed Layer  

Science Conference Proceedings (OSTI)

A four-layer three-dimensional model whose lowest layer is a time and space-dependent, well-mixed boundary layer is employed over artificial, irregular terrain on the mesoscale during a daytime heating cycle. Only if the surface heating and mixed-...

J. W. Deardorff; K. Ueyoshi; Y-J. Han

1984-04-01T23:59:59.000Z

272

Wind Regimes in Complex Terrain of the Great Valley of Eastern Tennessee  

Science Conference Proceedings (OSTI)

This research was designed to provide an understanding of physical wind mechanisms within the complex terrain of the Great Valley of Eastern Tennessee to assess the impacts of regional air flow with regard to synoptic and mesoscale weather changes, wind direction shifts, and air quality. Meteorological data from 2008 2009 were analyzed from 13 meteorological sites along with associated upper level data. Up to 15 ancillary sites were used for reference. Two-step complete linkage and K-means cluster analyses, synoptic weather studies, and ambient meteorological comparisons were performed to generate hourly wind classifications. These wind regimes revealed seasonal variations of underlying physical wind mechanisms (forced channeled, vertically coupled, pressure-driven, and thermally-driven winds). Synoptic and ambient meteorological analysis (mixing depth, pressure gradient, pressure gradient ratio, atmospheric and surface stability) suggested up to 93% accuracy for the clustered results. Probabilistic prediction schemes of wind flow and wind class change were developed through characterization of flow change data and wind class succession. Data analysis revealed that wind flow in the Great Valley was dominated by forced channeled winds (45 67%) and vertically coupled flow (22 38%). Down-valley pressure-driven and thermally-driven winds also played significant roles (0 17% and 2 20%, respectively), usually accompanied by convergent wind patterns (15 20%) and large wind direction shifts, especially in the Central/Upper Great Valley. The behavior of most wind regimes was associated with detectable pressure differences between the Lower and Upper Great Valley. Mixing depth and synoptic pressure gradients were significant contributors to wind pattern behavior. Up to 15 wind classes and 10 sub-classes were identified in the Central Great Valley with 67 joined classes for the Great Valley at-large. Two-thirds of Great Valley at-large flow was defined by 12 classes. Winds flowed on-axis only 40% of the time. The Great Smoky Mountains helped create down-valley pressure-driven winds, downslope mountain breezes, and divergent air flow. The Cumberland Mountains and Plateau were associated with wind speed reductions in the Central Great Valley, Emory Gap Flow, weak thermally-driven winds, and northwesterly down sloping. Ridge-and-valley terrain enhanced wind direction reversals, pressure-driven winds, as well as locally and regionally produced thermally-driven flow.

Birdwell, Kevin R [ORNL

2011-05-01T23:59:59.000Z

273

Utility Data Accessibility Map | Open Energy Information  

Open Energy Info (EERE)

Utility Data Accessibility Map Utility Data Accessibility Map Jump to: navigation, search Residential Commercial Benchmarking Energy Efficiency Delivery of Data Time Period Frequency of Data Access to Data Residential frequency of data access Ua Utility Data Access Map Having access to your electricity use data is a very important step in understanding your overall energy usage. Comparing historical data to your current usage is one way to see trends and determine ways for reducing electricity costs and improving overall efficiency. We asked all U.S. electric utility companies to tell us how accessible their electricity use data is for both residential and commercial customers. The results are updated live based on the responses we have to date. As more utilities provide information, the utility boundaries will be automatically colored

274

Chapter_12_Special_Access_Programs  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2 2 Special Access Programs This chapter describes the DOE Special Access Program (SAP) at DOE HQ and implements the requirements of: * Executive Order 13526, Classified National Security Information, Section 4.3, Special Access Programs, and Section 5.4, General Responsibilities, subparagraph (d). * DOE Order 471.5, Special Access Programs. A SAP is a program established for a specific class of classified information that imposes safeguarding and access requirements exceeding those normally required for information at the same classification level. Terms and activities such as Limited Access, Controlled Access, and Limited Distribution programs are not authorized. HQ Implementation Procedures SAP administration for both DOE and NNSA is handled through the Executive

275

Access Fund Partners LP | Open Energy Information  

Open Energy Info (EERE)

Access Fund Partners LP Access Fund Partners LP Jump to: navigation, search Name Access Fund Partners, LP Place San Juan Capistrano, California Zip 92675 Product Boutique investment banking and investment advisory firm with clean energy focus References Access Fund Partners, LP[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Access Fund Partners, LP is a company located in San Juan Capistrano, California . References ↑ "Access Fund Partners, LP" Retrieved from "http://en.openei.org/w/index.php?title=Access_Fund_Partners_LP&oldid=341703" Categories: Clean Energy Organizations Companies Organizations Stubs What links here Related changes Special pages Printable version

276

Tailoring interfacial exchange coupling with low-energy ion beam bombardment: Tuning the interface roughness  

SciTech Connect

By ascertaining NiO surface roughness in a Ni{sub 80}Fe{sub 20}/NiO film system, we were able to correlate the effects of altered interface roughness from low-energy ion-beam bombardment of the NiO layer and the different thermal instabilities in the NiO nanocrystallites. From experiment and by modelling the temperature dependence of the exchange bias field and coercivity, we have found that reducing the interface roughness and changing the interface texture from an irregular to striped conformation enhanced the exchange coupling strength. Our results were in good agreement with recent simulations using the domain state model that incorporated interface mixing.

Lin, K.-W.; Shueh, C.; Huang, H.-R.; Hsu, H.-F. [Department of Materials Science and Engineering, National Chung Hsing University, Tiachung 402, Taiwan (China); Mirza, M.; Lierop, J. van [Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2 (Canada)

2012-03-19T23:59:59.000Z

277

Adhesive contact of rough surfaces: comparison between numerical calculations and analytical theories  

E-Print Network (OSTI)

We have employed a numerical procedure to analyze the adhesive contact between a soft elastic layer and a rough rigid substrate. The solution of the problem is obtained by calculating the Green's function which links the pressure distribution to the normal displacements at the interface. The problem is then formulated in the form of a Fredholm integral equation of the first kind with a logarithmic kernel, and the boundaries of the contact area are calculated by requiring that the energy of the system is stationary. The methodology has been employed to study the adhesive contact between an elastic semi-infinite solid and a randomly rough rigid profile with a self-affine fractal geometry. We show that, even in presence of adhesion, the true contact area still linearly depends on the applied load. The numerical results are then critically compared with the prediction of an extended version of the Persson's contact mechanics theory, able to handle anisotropic surfaces, as 1D interfaces. It is shown that, for any given load, Persson's theory underestimates the contact area of about 50% in comparison with our numerical calculations. We find that this discrepancy is larger than what is found for 2D rough surfaces in case of adhesionless contact. We argue that this increased difference might be explained, at least partially, by considering that Persson's theory is a mean field theory in spirit, so it should work better for 2D rough surfaces rather than for 1D rough surfaces. We also observe, that the predicted value of separation is in very good agreement with our numerical results as well as the exponent of the power spectral density of the contact pressure distribution and of the elastic displacement of the solid. Therefore, we conclude that Persson's theory captures almost exactly the main qualitative behavior of the rough contact phenomena.

Giuseppe Carbone; Michele Scaraggi; Ugo Tartaglino

2010-06-03T23:59:59.000Z

278

Shear Wave Velocity Structure of Southern African Crust: Evidence for Compositional Heterogeneity within Archaean and Proterozoic Terrains  

Science Conference Proceedings (OSTI)

Crustal structure in southern Africa has been investigated by jointly inverting receiver functions and Rayleigh wave group velocities for 89 broadband seismic stations spanning much of the Precambrian shield of southern Africa. 1-D shear wave velocity profiles obtained from the inversion yield Moho depths that are similar to those reported in previous studies and show considerable variability in the shear wave velocity structure of the lower part of the crust between some terrains. For many of the Archaean and Proterozoic terrains in the shield, S velocities reach 4.0 km/s or higher over a substantial part of the lower crust. However, for most of the Kimberley terrain and adjacent parts of the Kheis Province and Witwatersrand terrain, as well as for the western part of the Tokwe terrain, mean shear wave velocities of {le} 3.9 km/s characterize the lower part of the crust along with slightly ({approx}5 km) thinner crust. These findings indicate that the lower crust across much of the shield has a predominantly mafic composition, except for the southwest portion of the Kaapvaal Craton and western portion of the Zimbabwe Craton, where the lower crust is intermediate-to-felsic in composition. The parts of the Kaapvaal Craton underlain by intermediate-to-felsic lower crust coincide with regions where Ventersdorp rocks have been preserved, and thus we suggest that the intermediate-to-felsic composition of the lower crust and the shallower Moho may have resulted from crustal melting during the Ventersdorp tectonomagmatic event at c. 2.7 Ga and concomitant crustal thinning caused by rifting.

Kgaswane, E M; Nyblade, A A; Julia, J; Dirks, P H H M; Durrheim, R J; Pasyanos, M E

2008-11-11T23:59:59.000Z

279

On the impact of Gold Open Access journals  

Science Conference Proceedings (OSTI)

Gold Open Access (=Open Access publishing) is for many the preferred route to achieve unrestricted and immediate access to research output. However, true Gold Open Access journals are still outnumbered by traditional journals. Moreover availability of ... Keywords: Directory of Open Access journals (DOAJ), Gold Open Access, Impact analysis, Impact evolution, Journal citation reports (JCR), Journal impact factor, Open Access publishing, SJR, SNIP, Ulrichsweb

Christian Gumpenberger; María-Antonia Ovalle-Perandones; Juan Gorraiz

2013-07-01T23:59:59.000Z

280

Kosterlitz-Thouless Transition in 4He Films Adsorbed to Rough Calcium Fluoride  

Science Conference Proceedings (OSTI)

Previous measurements in our lab have shown that the onset of superfluidity at the KT transition, typically seen as a sharp change in the frequency of a smooth-surface quartz crystal microbalance, becomes less identifiable in the presence of increasing surface roughness or disorder, while the peak in the dissipation is unchanged. Using a series of microbalances coated with increasingly rough CaF2, we have extended our measurements to lower 4He film coverages and thus lower temperatures. We find at lower 4He coverages that the presence of disorder on the substrate has a diminished effect on the frequency shift.

Luhman, D. R.; Hallock, R. B. [Laboratory of Low Temperature Physics, Department of Physics, University of Massachusetts, Amherst, 01003 (United States)

2006-09-07T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Global Distribution of Ice Cloud Particle Shape and Roughness from PARASOL Satellite Measurements  

E-Print Network (OSTI)

The energy balance of the Earth is regulated in part by ice clouds, which both reflect shortwave solar radiation and absorb infrared radiation from the Earth. These clouds appear frequently worldwide, with up to 70% coverage in tropical regions. The microphysics of ice clouds determines their radiative properties, and is important for accurately predicting the role of ice clouds in Earth’s energy balance. However, describing the microphysics of ice clouds remains a challenging problem, especially with regard to the shape of ice particles and the degree of ice particle surface roughening. In-situ studies have found evidence for ice surface roughness and have found many complex ice geometries; however, these studies are limited spatially and temporally. An approach which allows large-scale analysis is to retrieve these properties via theoretical modeling using satellite observations of polarized reflectance from ice clouds, since polarized reflectance is sensitive to the shape and roughness of ice particles. The theoretical model requires the scattering properties of simulated ice particles. These properties are obtained for 10 different ice shapes and 17 different levels of surface roughness. Simulations are performed for 3 different effective ice particle diameters: 30, 60 and 90 ?m. Overall, the retrieved shape is dominated by the compact aggregate of columns. Although the exact composition of shapes varies from month to month, the compact aggregate of columns remains the most commonly retrieved shape. The retrieved roughness varies from moderately rough at ? = 0.1 to severely rough at ? = 0.5. Retrieved roughness varies more than shape, and smooth surfaced ice is most prominent in January. Tropical regions tend to have ice particles that are more roughened, while the midlatitudes and polar regions tend to have more smooth ice. In almost all cases, roughened ice represents > 60% of the total retrievals. The asymmetry parameter inferred from the retrieval of ice particle shape and roughness has a mean value near 0.77, with only small differences based on assumed ice effective diameter. The median value of the asymmetry parameter has a nearly constant value of approximately 0.75.

Cole, Benjamin

2013-08-01T23:59:59.000Z

282

A Fetch Dependent Model Of Sea Surface Roughness For Offshore Wind Power Utilisation  

E-Print Network (OSTI)

The sea surface roughness z 0 is usually determined from friction velocity u * with the Charnock relation as z 0 =z ch u * /g, where g is the gravitational acceleration and z ch an empirical parameter, which was meant to be a constant, but turned out to be site specific for sites with coastal influence. Several attempts to improve this relation aim on finding a power law between a non-dimensional sea surface roughness and a non-dimensional group describing the influence of the wave field. The Rdsand field measurement was used to test several proposed relations. A significant

Bernhard Lange; Jørgen Højstrup; Søren Larsen; Rebecca Barthelmie

2001-01-01T23:59:59.000Z

283

Instructions for using HSPD-12 Authenticated Outlook Web Access...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

using HSPD-12 Authenticated Outlook Web Access (OWA) Instructions for using HSPD-12 Authenticated Outlook Web Access (OWA) Provides instructions for remote Outlook access using...

284

SPEED CONTROL SYSTEM FOR AN ACCESS GATE - Energy Innovation Portal  

An access control apparatus for an access gate. The access gate typically has a rotator that is configured to rotate around a rotator axis at a first ...

285

SLAC Lightsource User Access Guidelines and Agreement  

NLE Websites -- All DOE Office Websites (Extended Search)

Lightsource User Access Guidelines & Agreement Lightsource User Access Guidelines & Agreement August 3, 2011 SLAC-I-030-306-001-00-R002 1 SLAC Lightsource User Access Guidelines and Agreement LCLS / SSRL User Research Administration approval (signature/date): LCLS Safety Office approval (signature/date): SSRL Safety Office approval (signature/date): XFO Operations approval (signature/date): Revision Record Revision Date Revised Section(s) Affected Description of Change R001 October 4 th , 2010 User Form Updated SLAC Lightsource User Access Agreement Form R000 Sept 14, 2009 Original Release SLAC Lightsource User Access Guidelines & Agreement August 3, 2011 SLAC-I-030-306-001-00-R002 1 SLAC LIGHTSOURCE USER ACCESS GUIDELINES & AGREEMENT Introduction Welcome to SSRL and LCLS, SLAC's lightsource user facilities. We hope that your stay here will be

286

Rough Sets in the Interpretation of Statistical Tests Outcomes for Genes Under Hypothetical Balancing Selection  

Science Conference Proceedings (OSTI)

Detection of natural selection at the molecular level is one of the crucial problems in contemporary population genetics. There exists a number of statistical tests designed for it, however, the interpretation of the outcomes is often obscure, because ... Keywords: ATM, BLM, RECQL, WRN, natural selection, neutrality tests, rough sets

Krzysztof Cyran

2007-06-01T23:59:59.000Z

287

The Rough Guide to the iPad, 2nd edition  

Science Conference Proceedings (OSTI)

It's an eBook reader. It's a touch-screen computer. It's a games machine. It's a movie player. It's for browsing the web and sending emails. Whatever you think the Apple iPad is, "The Rough Guide to the iPad" will show you that it's so much more, and ...

Peter Buckley

2011-06-01T23:59:59.000Z

288

A Controller Design for the Khepera Robot: A Rough Set Approach  

Science Conference Proceedings (OSTI)

The Khepera robot belongs to the family of miniature mobile robots of the K-Team firm. It is used in a number of places for scientific and educational purposes. Considering its advantages (such as small size, precision of movement, ease of control), ... Keywords: Artificial intelligence, Khepera robot, control design, expert system, fuzzy systems, machine learning, rough sets

Zbigniew Suraj; James F. Peters; Piotr Grochowalski

2005-02-01T23:59:59.000Z

289

Discovering patterns of missing data in survey databases: An application of rough sets  

Science Conference Proceedings (OSTI)

Databases for data mining often have missing values. Missing data are often mistreated in data mining and valuable knowledge related to missing data is often overlooked. This study discusses patterns of missing data in survey databases. It proposes a ... Keywords: Association rules, Data mining, Knowledge discovery, Missing values, Rough sets, Rule induction, Survey

Hai Wang; Shouhong Wang

2009-04-01T23:59:59.000Z

290

Effect of Roughness as Determined by Atomic Force Microscopy on the Wetting Properties of PTFE Thin  

E-Print Network (OSTI)

Effect of Roughness as Determined by Atomic Force Microscopy on the Wetting Properties of PTFE Thin Engineering College of Mines and Earth Sciences University of Utah Salt Lake City, Utah 84112 and G. YAMAUCHI films has been investigated using atomic force microscopy (AFM) and contact angle goniometry. Surface

Drelich, Jaroslaw W.

291

Contribution of Boussinesq pressure and bottom roughness terms for open channel flows with shocks  

Science Conference Proceedings (OSTI)

For high-velocity flows accompanied with hydraulic jump, this paper attempts to evaluate the contribution of non-hydrostatic (i.e., Boussinesq) pressure term and the bottom roughness coefficient. To perform this analysis, we have solved the one-dimensional ... Keywords: high resolution, hydraulic jump, hydrostatic, modeling, shocks

Prasada Rao

2002-12-01T23:59:59.000Z

292

Stock Trading Using RSPOP: A Novel Rough Set-Based Neuro-Fuzzy Approach  

Science Conference Proceedings (OSTI)

This paper investigates the method of forecasting stock price difference on artificially generated price series data using neuro-fuzzy systems and neural networks. As trading profits is more important to an investor than statistical performance, this ... Keywords: Forecasting theory, fuzzy neural networks, rough set theory, stock market, time series

K. K. Ang; C. Quek

2006-09-01T23:59:59.000Z

293

A New Drag Relation for Aerodynamically Rough Flow over the Ocean  

Science Conference Proceedings (OSTI)

From almost 7000 near-surface eddy-covariance flux measurements over the sea, the authors deduce a new air–sea drag relation for aerodynamically rough flow:Here u* is the measured friction velocity, and UN10 is the neutral-stability wind speed at ...

Edgar L Andreas; Larry Mahrt; Dean Vickers

2012-08-01T23:59:59.000Z

294

Effective thermal conductivity of rough spherical packed beds Majid Bahrami *, M. Michael Yovanovich, J. Richard Culham  

E-Print Network (OSTI)

relationships. The present model accounts for the thermophysical properties of spheres and the gas, load-dimensional numerical analysis which makes the FEM modeling extremely expen- sive from the calculative point of view [3]. In addition, ther- mal contact resistance (TCR) of rough spheres must be fed into the software as boundary

Bahrami, Majid

295

Application of Particle Swarm Optimization technique for achieving desired milled surface roughness in minimum machining time  

Science Conference Proceedings (OSTI)

Face milling is a widely used machining operation to produce various components. The finished component depends not only on the dimensional accuracy but also on the surface finish. The present method of selection of machining parameters by trial and ... Keywords: Face milling, Machining parameters, Machining time, Particle Swarm Optimization, Surface roughness

S. Bharathi Raja; N. Baskar

2012-04-01T23:59:59.000Z

296

Combining rough set and case based reasoning for process conditions selection in camshaft grinding  

Science Conference Proceedings (OSTI)

Case Based Reasoning (CBR) is a novel paradigm that uses previous cases to solve new, unseen and different problems. However, redundant features may not only dramatically increase the case memory, but also make the case retrieval more time-consuming. ... Keywords: Camshaft grinding, Case based reasoning, Case evaluation, Case reclassify, Feature reduction, Genetic algorithm, Rough set

X. H. Zhang; Z. H. Deng; W. Liu; H. Cao

2013-04-01T23:59:59.000Z

297

Temporal and Spatial Aspects of Velocity Variance in the Urban Surface Roughness Layer  

Science Conference Proceedings (OSTI)

Data from six urban areas in a nationwide network of sites within the surface roughness layer are examined. It is found that the average velocity variances in time, derived by averaging the conventional variances from a network of n stations, are ...

Bruce B. Hicks; Elena Novakovskaia; Ronald J. Dobosy; William R. Pendergrass III; William J. Callahan

2013-03-01T23:59:59.000Z

298

Rough set-based approach for modeling relationship measures in product planning  

Science Conference Proceedings (OSTI)

Quality function deployment (QFD) provides a planning and problem-solving methodology that is widely renowned for translating customer requirements (CRs) into engineering characteristics (ECs) for new product development. As the first phase of QFD, product ... Keywords: Customer requirement, Engineering characteristic, Quality function deployment, Relationship measure, Rough set

Yan-Lai Li; Jia-Fu Tang; Kwai-Sang Chin; Xing-Gang Luo; Yi Han

2012-06-01T23:59:59.000Z

299

Exploring the boundary region of tolerance rough sets for feature selection  

Science Conference Proceedings (OSTI)

Of all of the challenges which face the effective application of computational intelligence technologies for pattern recognition, dataset dimensionality is undoubtedly one of the primary impediments. In order for pattern classifiers to be efficient, ... Keywords: Attribute reduction, Classification, Feature selection, Rough sets

Neil Mac Parthaláin; Qiang Shen

2009-05-01T23:59:59.000Z

300

The generic genetic algorithm incorporates with rough set theory - An application of the web services composition  

Science Conference Proceedings (OSTI)

Evolutionary computing (EC) techniques have been used traditionally used for solving challenging optimization problems. But the increase in data and information has reduced the performance capacity of the GA, but highlighted the cost of finding a solution ... Keywords: Generic, Genetic algorithm, Rough set, Web services, Web services composition

Wen-Yau Liang; Chun-Che Huang

2009-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Uncertainty handling in navigation services using rough and fuzzy set theory  

Science Conference Proceedings (OSTI)

Navigation services, such as used in cars, are widely used nowadays. Many applications, positioning technologies and techniques have been developed to make navigation systems easier to use. However current navigation systems suffer from different aspects ... Keywords: fuzzy set theory, location based services, navigation services, rough set theory, spatio-temporal objects, uncertainty

Anahid Basiri; Pouria Amirian; Adam Winstanley; Colin Kuntzsch; Monika Sester

2012-11-01T23:59:59.000Z

302

Site Access Policy | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Laboratory About Work with Argonne Safety News Community Events Careers Directory Energy Environment Security User Facilities Science Technology Visiting Argonne Site Access...

303

Presenting Accessibility to Mobility-Impaired Travelers  

E-Print Network (OSTI)

Behaviors of the Mobility-Disabled Consumer." Journal ofCampus Access Guide at the Disabled Student Program at UCto dental services for disabled people. A questionnaire

Nuernberger, Andrea

2008-01-01T23:59:59.000Z

304

Adjudicative Guidelines for Determining Eligibility for Access...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

to help a foreign person, group, or country by providing that information; (c) counterintelligence information, that may be classified, indicates that the individual's access to...

305

Expanding Researcher Access to EIA Microdata  

U.S. Energy Information Administration (EIA)

personal computers at remote locations. EIA’s research access program is much more limited than those offered by other statistical agencies.

306

ORISE Resources: Puerto Rico Equal Access Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Minority AIDS Council (NMAC) and Office of AIDS Research (OAR) Puerto Rico Equal Access Program (PREAP). This PREAP training was specifically developed for the Puerto Rican...

307

Technology and Access to Knowledge - CECM  

E-Print Network (OSTI)

Feb 9, 1998 ... Technology and Access to Knowledge. Mathematics as a branch of human knowledge is several millenia old, and though each individual ...

308

NBP RFI: Data Access | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

for approximately 11 percent of all electric energy sold in the United States. NBP RFI: Data Access More Documents & Publications Re: DOE Request for Information - Implementing the...

309

Content-Based Access to Unstructured Information  

Science Conference Proceedings (OSTI)

... of automatic systems that can provide content-based access to information that has not been explicitly structured for machine consumption. ...

2012-01-03T23:59:59.000Z

310

Data Center Access Policies and Version 2.0  

E-Print Network (OSTI)

Data Center Access Policies and Procedures Version 2.0 Tuesday, April 6, 2010 University://uits.arizona.edu #12;Table of Contents UITS Data Center Access Policies and Procedures!3 .Introduction!3 Overview!3 Data Center Access!3 Data Center Access - Levels of Access!4 Periodic Review and Termination of Access

Watkins, Joseph C.

311

Archive Access and Accessibility: A Progress Report on Social Networking at Work  

E-Print Network (OSTI)

bubble demo: http://lah.soas.ac.uk/projects/dev/bubble-player/wilbur.html 34 Access is also about perceptions ? perceptions of interfaces – like Facebook, ELAR “reduces distance and power disparities, supports interactions” ? difficult access mistaken...

Nathan, David

2010-12-10T23:59:59.000Z

312

Three web accessibility evaluation perspectives for RIA  

Science Conference Proceedings (OSTI)

With the increasing popularity of Rich Internet Applications (RIAs), several challenges arise in the area of web accessibility evaluation. A particular set of challenges emerges from RIAs dynamic nature: original static Web specifications can change ... Keywords: automated evaluation, web accessibility, web browser processing, web science

Nádia Fernandes, Ana Sofia Batista, Daniel Costa, Carlos Duarte, Luís Carriço

2013-05-01T23:59:59.000Z

313

Web Accessibility Office of Diversity and Inclusion  

E-Print Network (OSTI)

Web Accessibility Office of Diversity and Inclusion Applies to: Any website conducting university of the art digital and web based information delivery of information is increasingly central in carrying out constituencies. This policy establishes minimum standards for the accessibility of web based information

Jones, Michelle

314

National Radiobiology Archives Distributed Access user's manual  

SciTech Connect

This User's Manual describes installation and use of the National Radiobiology Archives (NRA) Distributed Access package. The package consists of a distributed subset of information representative of the NRA databases and database access software which provide an introduction to the scope and style of the NRA Information Systems.

Watson, C.; Smith, S. (Pacific Northwest Lab., Richland, WA (United States)); Prather, J. (Linfield Coll., McMinnville, OR (United States))

1991-11-01T23:59:59.000Z

315

Improving Access to Web Content at Google  

E-Print Network (OSTI)

1 Improving Access to Web Content at Google Loretta Guarino Reid (LorettaGuarino@google.com) Srinivas Annam (AnnamS@google.com) March 12, 2008 #12;2 Overview Accessibility developments for : · Gmail · Search · Toolbar · Maps & Transit · Books · Video & Captions · Short Topics ­ Calendar, Google Groups

Cortes, Corinna

316

Distributed user access control in sensor networks  

Science Conference Proceedings (OSTI)

User access control in sensor networks defines a process of granting user the access right to the information and resources. It is essential for the future real sensor network deployment in which sensors may provide users with different services in terms ...

Haodong Wang; Qun Li

2006-06-01T23:59:59.000Z

317

Locally Accessible Information and Distillation of Entanglement  

E-Print Network (OSTI)

A new type of complementary relation is found between locally accessible information and final average entanglement for given ensemble. It is also shown that in some well known distillation protocol, this complementary relation is optimally satisfied. We discuss the interesting trade-off between locally accessible information and distillable entanglement for some states.

Sibasish Ghosh; Pramod Joag; Guruprasad Kar; Samir Kunkri; Anirban Roy

2004-03-18T23:59:59.000Z

318

Transformer fault diagnosis based on reasoning integration of rough set and fuzzy set and Bayesian optimal classifier  

Science Conference Proceedings (OSTI)

In accordance with intelligent complementary strategies, a new transformer fault diagnosis method is proposed based on rough set (RS) and fuzzy set (FS) and Bayesian optimal classifier in this paper. Through RS reduction, the diagnostic decision table ... Keywords: Bayesian optimal classifier, fault diagnosis, fuzzy set, information entropy, intelligent complementary, rough set, transformer

Hongsheng Su; Haiying Dong

2009-01-01T23:59:59.000Z

319

Ethiopia Energy Access Project | Open Energy Information  

Open Energy Info (EERE)

Ethiopia Energy Access Project Ethiopia Energy Access Project Jump to: navigation, search Name of project Ethiopia Energy Access Project Location of project Ethiopia Energy Services Lighting, Cooking and water heating, Information and communications Year initiated 2005 Organization World Bank Website http://documents.worldbank.org Coordinates 9.145°, 40.489673° References The World Bank[1] The Energy Access Project for Ethiopia will establish a sustainable program for expanding the population's access to electricity and improving the quality and adequacy of electricity supply, reduce environmental degradation and improve energy end-use efficiency; reduce the barriers to the wide spread adoption of renewable energy technologies, and provide technical support for institutional and capacity building of key sector

320

ESCORT: a decentralized and localized access control system for mobile wireless access to secured domains  

Science Conference Proceedings (OSTI)

In this work we design and implement ESCORT, a backward compatible, efficient, and secure access control system, to facilitate mobile wireless access to secured wireless LANs. In mobile environments, a mobile guest may frequently ... Keywords: decentralized access control, identity privacy, location privacy, mobile privacy, wireless security

Jiejun Kong; Shirshanka Das; Edward Tsai; Mario Gerla

2003-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Electrochemical machining process for forming surface roughness elements on a gas turbine shroud  

SciTech Connect

The back side recessed cooling surface of a shroud defining in part the hot gas path of a turbine is electrochemically machined to provide surface roughness elements and spaces therebetween to increase the heat transfer coefficient. To accomplish this, an electrode with insulating dielectric portions and non-insulating portions is disposed in opposition to the cooling surface. By passing an electrolyte between the cooling surface and electrode and applying an electrical current between the electrode and a shroud, roughness elements and spaces therebetween are formed in the cooling surface in opposition to the insulating and non-insulating portions of the electrode, hence increasing the surface area and heat transfer coefficient of the shroud.

Lee, Ching-Pang (Cincinnati, OH); Johnson, Robert Alan (Simpsonville, SC); Wei, Bin (Mechanicville, NY); Wang, Hsin-Pang (Rexford, NY)

2002-01-01T23:59:59.000Z

322

Energy production rates in fluid mixtures of inelastic rough hard spheres  

E-Print Network (OSTI)

The aim of this work is to explore the combined effect of polydispersity and roughness on the partial energy production rates and on the total cooling rate of a granular fluid mixture. We consider a mixture of inelastic rough hard spheres of different number densities, masses, diameters, moments of inertia, and mutual coefficients of normal and tangential restitution. Starting from the first equation of the BBGKY hierarchy, the collisional energy production rates associated with the translational and rotational temperatures ($T_i^\\text{tr}$ and $T_i^\\text{rot}$) are expressed in terms of two-body average values. Next, those average values are estimated by assuming a velocity distribution function based on maximum-entropy arguments, allowing us to express the energy production rates and the total cooling rate in terms of the partial temperatures and the parameters of the mixture. Finally, the results are applied to the homogeneous cooling state of a binary mixture and the influence of inelasticity and roughness on the temperature ratios $T_1^\\text{tr}/T_1^\\text{rot}$, $T_2^\\text{tr}/T_1^\\text{tr}$, and $T_2^\\text{rot}/T_1^\\text{rot}$ is analyzed.

Andrés Santos; Gilberto M. Kremer; Vicente Garzó

2009-10-29T23:59:59.000Z

323

The Resonator Impedance Model of Surface Roughness Applied to the LCLS Parameters  

E-Print Network (OSTI)

The resonator impedance model of surface roughness in a cylindrical beam tube, derived in Ref. 1, is compared to the inductive impedance model of Ref. 2. It is shown that for long, smooth bunches the two models both give an inductive response, that the e#ective inductance per length is proportional to the corrugation depth over the beam pipe radius, and that the absolute results also are comparable. For a non-smooth bunch shape, such as is found in the undulator region of the LCLS, however, the inductive impedance model is no longer valid; and the resonator model gives a non-inductive response, with the induced energy spread decreasing much more slowly with increasing bunch length than for a smooth distribution. When applied to the actual bunch shape and parameters in the LCLS, the resonator model predicts that, to remain within tolerances for induced energy spread, the beam tube roughness must be kept to 10 nm. Further calculations suggest, however, that if the period-to-depth aspect ratio of the surface features is large, #as has been found in recent measurements of polished beam tube surfaces#, then the wake#eld e#ect may be greatly suppressed, and the roughness tolerance greatly increased.

Karl L.F. Bane; Alexander Novokhatskii

1999-01-01T23:59:59.000Z

324

Effects of Terrain Heights and Sizes on Island-Scale Circulations and Rainfall for the Island of Hawaii during HaRP  

Science Conference Proceedings (OSTI)

Islands in Hawaii have different sizes and terrain heights with notable differences in climate and weather. In this study, the fifth-generation Pennsylvania State University–NCAR Mesoscale Model (MM5) land surface model (LSM) is used to conduct ...

Yang Yang; Yi-Leng Chen

2008-01-01T23:59:59.000Z

325

Estimating the Urban Heat Island Contribution to Urban and Rural Air Temperature Differences over Complex Terrain: Application to an Arid City  

Science Conference Proceedings (OSTI)

This study proposes a method for estimating the canopy-layer net urban heat island (UHI) in regions with complex terrain that lack preurban observations. The approach is based on a linear relationship between the urban–rural temperature ...

Hadas Saaroni; Baruch Ziv

2010-10-01T23:59:59.000Z

326

Role of Topography in Forcing Low-Level Jets in the Central United States during the 1993 Flood-Altered Terrain Simulations  

Science Conference Proceedings (OSTI)

Regional model sensitivity simulations in which the height of elevated terrain was reduced to explore simulated changes in features of the low-level jet (LLJ) are presented. Such an approach has not been reported, and it provides complementary ...

Zaitao Pan; Moti Segal; Raymond W. Arritt

2004-01-01T23:59:59.000Z

327

Weather Forecasts by the WRF-ARW Model with the GSI Data Assimilation System in the Complex Terrain Areas of Southwest Asia  

Science Conference Proceedings (OSTI)

This paper will first describe the forecasting errors encountered from running the National Center for Atmospheric Research (NCAR) mesoscale model (the Advanced Research Weather Research and Forecasting model; ARW) in the complex terrain of ...

J. Xu; S. Rugg; L. Byerle; Z. Liu

2009-08-01T23:59:59.000Z

328

A Comparison of Methods for Computing the Sigma-Coordinate Pressure Gradient Force for Flow over Sloped Terrain in a Hybrid Theta-Sigma Model  

Science Conference Proceedings (OSTI)

Five methods for computing the pressure gradient force within a sigma domain of a hybrid model are compared for flow over a steeply sloped terrain. The comparison includes pressure gradient calculations determined from a direct transformation to ...

Donald R. Johnson; Louis W. Uccellini

1983-04-01T23:59:59.000Z

329

Downscaling Climate over Complex Terrain: High Finescale (<1000 m) Spatial Variation of Near-Ground Temperatures in a Montane Forested Landscape (Great Smoky Mountains)  

Science Conference Proceedings (OSTI)

Landscape-driven microclimates in mountainous terrain pose significant obstacles to predicting the response of organisms to atmospheric warming, but few if any studies have documented the extent of such finescale variation over large regions. ...

Jason D. Fridley

2009-05-01T23:59:59.000Z

330

A Numerical Sensitivity Study on the Impact of Soil Moisture on Convection-Related Parameters and Convective Precipitation over Complex Terrain  

Science Conference Proceedings (OSTI)

The impact of soil moisture on convection-related parameters and convective precipitation over complex terrain is studied by numerical experiments using the nonhydrostatic Consortium for Small-Scale Modeling (COSMO) model. For 1 day of the ...

Christian Barthlott; Norbert Kalthoff

2011-12-01T23:59:59.000Z

331

Rail Access to Yucca Mountain: Critical Issues  

SciTech Connect

The proposed Yucca Mountain repository site currently lacks rail access. The nearest mainline railroad is almost 100 miles away. Absence of rail access could result in many thousands of truck shipments of spent nuclear fuel and high-level radioactive waste. Direct rail access to the repository could significantly reduce the number of truck shipments and total shipments. The U.S. Department of Energy (DOE) identified five potential rail access corridors, ranging in length from 98 miles to 323 miles, in the Final Environmental Impact Statement (FEIS) for Yucca Mountain. The FEIS also considers an alternative to rail spur construction, heavy-haul truck (HHT) delivery of rail casks from one of three potential intermodal transfer stations. The authors examine the feasibility and cost of the five rail corridors, and DOE's alternative proposal for HHT transport. The authors also address the potential for rail shipments through the Las Vegas metropolitan area.

Halstead, R. J.; Dilger, F.; Moore, R. C.

2003-02-25T23:59:59.000Z

332

PARS II User Account Access Guide  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Office of Management Office of Management Office of Engineering and Construction Management User Account Access Guide for PARS II Version 1.5 June 25, 2011 Submitted by: Energy Enterprise Solutions 20440 Century Blvd. Suite 150 Germantown, MD 20874 Phone 301-916-0050 Fax 301-916-0066 www.eesllc.net June 25, 2011 (V1.5) PARS II User Account Access Guide ii This page intentionally left blank. June 25, 2011 (V1.5) PARS II User Account Access Guide iii Title Page Document Name: User Account Access Guide for PARS II Version Number: V1.5 Publication Date: June 25, 2011 Contract Number: DE-AT01-06IM00102 Project Number: 1ME07 CLIN 4 Prepared by: Scott Burns, Energy Enterprise Solutions, LLC Reviewed by: Judith Bernsen, Energy Enterprise Solutions, LLC

333

Dynamic spectrum access -- concepts and future architectures  

Science Conference Proceedings (OSTI)

New trends and developments in radio technology are enhancing the future capabilities of devices to access electromagnetic spectrum using the full range of dimensions associated with the spectrum. This increased capability, together with current developments ...

M. Nekovee

2006-04-01T23:59:59.000Z

334

Decision Analysis of Dynamic Spectrum Access Rules  

SciTech Connect

A current trend in spectrum regulation is to incorporate spectrum sharing through the design of spectrum access rules that support Dynamic Spectrum Access (DSA). This paper develops a decision-theoretic framework for regulators to assess the impacts of different decision rules on both primary and secondary operators. We analyze access rules based on sensing and exclusion areas, which in practice can be enforced through geolocation databases. Our results show that receiver-only sensing provides insufficient protection for primary and co-existing secondary users and overall low social welfare. On the other hand, using sensing information between the transmitter and receiver of a communication link, provides dramatic increases in system performance. The performance of using these link end points is relatively close to that of using many cooperative sensing nodes associated to the same access point and large link exclusion areas. These results are useful to regulators and network developers in understanding in developing rules for future DSA regulation.

Juan D. Deaton; Luiz A. DaSilva; Christian Wernz

2011-12-01T23:59:59.000Z

335

Accessing speech data using strategic fixation  

Science Conference Proceedings (OSTI)

When users access information from text, they engage in strategic fixation, visually scanning the text to focus on regions of interest. However, because speech is both serial and ephemeral, it does not readily support strategic fixation. This paper describes ...

Steve Whittaker; Julia Hirschberg

2007-04-01T23:59:59.000Z

336

Fair resource allocation in multiple access channels  

E-Print Network (OSTI)

We consider the problem of resource allocation in a multiple access channel. Our objective is to obtain rate and power allocation policies that maximize a general concave utility function of average transmission rates over ...

ParandehGheibi, Ali

2008-01-01T23:59:59.000Z

337

JOBAID-ACCESSING AND MODIFYING TALENT PROFILE  

Energy.gov (U.S. Department of Energy (DOE))

The purpose of this job aid is to guide users through the step-by-step process of accessing their talent profiles, adding information to their profiles, and editing existing talent profile...

338

North Carolina Capital Access Program (North Carolina)  

Energy.gov (U.S. Department of Energy (DOE))

The North Carolina Capital Access Program provides matching reserve funds for business loans that are beyond the traditional lending means of a lender’s usual standards. The average CAP loan is ...

339

Radio over fiber in multimedia access networks  

Science Conference Proceedings (OSTI)

Dominant broadband access technologies today are Digital Subscriber Line (DSL) and hybrid fiber coaxial (HFC) networks. DSL leads, with global subscribers exceeding 100 million, while cable-modem subscribers worldwide total 55 million in 2005 [1]. Recently, ...

Xavier Fernando

2006-09-01T23:59:59.000Z

340

Data Link Switching Client Access Protocol  

Science Conference Proceedings (OSTI)

This memo describes the Data Link Switching Client Access Protocol that is used between workstations and routers to transport SNA/ NetBIOS traffic over TCP sessions. Any questions or comments should be sent to dcap@cisco.com.

S. Chiang; J. Lee; H. Yasuda

1997-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

U-205: RSA Access Manager Session Replay Flaw Lets Remote Users Access the  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

5: RSA Access Manager Session Replay Flaw Lets Remote Users 5: RSA Access Manager Session Replay Flaw Lets Remote Users Access the System U-205: RSA Access Manager Session Replay Flaw Lets Remote Users Access the System July 5, 2012 - 7:02am Addthis PROBLEM: RSA Access Manager Session Replay Flaw Lets Remote Users Access the System PLATFORM: Version(s): Server version 6.0.x, 6.1, 6.1 SP1, 6.1 SP2, 6.1 SP3; all Agent versions ABSTRACT: A vulnerability was reported in RSA Access Manager. A remote user can gain access to the target system. reference LINKS: SecurityFocus ESA-2012-026 SecurityTracker Alert ID: 1027220 CVE-2012-2281 RSA SecurCare Online MPACT ASSESSMENT: Medium Discussion: RSA Access Manager contains a vulnerability that can be potentially exploited by a malicious user to replay the session with compromised session tokens. This is due to improper invalidation of session tokens

342

U-205: RSA Access Manager Session Replay Flaw Lets Remote Users Access the  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

205: RSA Access Manager Session Replay Flaw Lets Remote Users 205: RSA Access Manager Session Replay Flaw Lets Remote Users Access the System U-205: RSA Access Manager Session Replay Flaw Lets Remote Users Access the System July 5, 2012 - 7:02am Addthis PROBLEM: RSA Access Manager Session Replay Flaw Lets Remote Users Access the System PLATFORM: Version(s): Server version 6.0.x, 6.1, 6.1 SP1, 6.1 SP2, 6.1 SP3; all Agent versions ABSTRACT: A vulnerability was reported in RSA Access Manager. A remote user can gain access to the target system. reference LINKS: SecurityFocus ESA-2012-026 SecurityTracker Alert ID: 1027220 CVE-2012-2281 RSA SecurCare Online MPACT ASSESSMENT: Medium Discussion: RSA Access Manager contains a vulnerability that can be potentially exploited by a malicious user to replay the session with compromised session tokens. This is due to improper invalidation of session tokens

343

Issues In Natural Language Access To Databases From A Logic Programming Perspective  

E-Print Network (OSTI)

I shall discuss issues in natural language (NL) access to databases in the light of an experimental NL question-answering system, Chat, which I wrote with Fernando Perelra at Edinburgh University, and which is described more fully elsewhere [8] [6] [5]. Our approach was strongly influenced by the work of Alain Colmerauer [2] and Veronlca Dahl [3] at Marseille University. Chat processes a NL question in three main stages: translation planning execution English .... > logic .... > Prolog .... > answer corresponding roughly to: "What does the question mean?", "How shall I answer it?", "What is the answer?". The meaning of a NL question, and the database of information about the application domain, are both represented as statements in an extension of a subset of first-order logic, which we call "definite closed world" (DCW) logic. This logic is a subset of first-order logic, in that it admits only "definite" statements; uncertain information ("Either this or that") is no

David H. D. Warren

1982-01-01T23:59:59.000Z

344

Improving the Noah Land Surface Model in Arid Regions with an Appropriate Parameterization of the Thermal Roughness Length  

Science Conference Proceedings (OSTI)

Daytime land surface temperatures in arid and semiarid regions are typically not well simulated in current land surface models (LSMs). This study first evaluates the importance of parameterizing the thermal roughness length (z0h) to model the ...

Yingying Chen; Kun Yang; Degang Zhou; Jun Qin; Xiaofeng Guo

2010-08-01T23:59:59.000Z

345

A New Scheme for Effective Roughness Length and Effective Zero-Plane Displacement in Land Surface Models  

Science Conference Proceedings (OSTI)

Based on the similarity theory of the atmospheric surface layer and the flux conservation and mass conservation laws, a new scheme for determining the effective roughness length (ERL) and the effective zero-plane displacement (EZPD) for a ...

Zhong Zhong; Wei Lu; Shuai Song; Yaocun Zhang

2011-12-01T23:59:59.000Z

346

Influences of Sea Surface Temperature Gradients and Surface Roughness Changes on the Motion of Surface Oil: A Simple Idealized Study  

Science Conference Proceedings (OSTI)

The authors' modeling shows that changes in sea surface temperature (SST) gradients and surface roughness between oil-free water and oil slicks influence the motion of the slick. Physically significant changes occur in surface wind speed, surface ...

Yangxing Zheng; Mark A. Bourassa; Paul Hughes

2013-07-01T23:59:59.000Z

347

A Self-Contained Sector-Scanning Sonar for Bottom Roughness Observations as Part of Sediment Transport Studies  

Science Conference Proceedings (OSTI)

Studies and models of sediment transport in the bottom boundary layer require knowledge of the bottom roughness as a parameter affecting the suspension and transport of sediment. Knowledge of this has often been quite imprecise since measurements ...

J. D. Irish; J. F. Lynch; P. A. Traykovski; A. E. Newhall; K. Prada; A. E. Hay

1999-11-01T23:59:59.000Z

348

An Improvement of Roughness Height Parameterization of the Surface Energy Balance System (SEBS) over the Tibetan Plateau  

Science Conference Proceedings (OSTI)

Roughness height for heat transfer is a crucial parameter in the estimation of sensible heat flux. In this study, the performance of the Surface Energy Balance System (SEBS) has been tested and evaluated for typical land surfaces on the Tibetan ...

Xuelong Chen; Zhongbo Su; Yaoming Ma; Kun Yang; Jun Wen; Yu Zhang

2013-03-01T23:59:59.000Z

349

Property:EnergyAccessYearInitiated | Open Energy Information  

Open Energy Info (EERE)

EnergyAccessYearInitiated EnergyAccessYearInitiated Jump to: navigation, search Property Name EnergyAccessYearInitiated Property Type Date Description Year Initiated Pages using the property "EnergyAccessYearInitiated" Showing 10 pages using this property. B Benin: Increased Access to Modern Energy Project + 2009 + Burkina Faso Energy Access Project + 2007 + E Ethiopia Energy Access Project + 2005 + G Ghana Energy Development and Access Project (GEDAP) + 2007 + M Mongolia Renewable Energy and Rural Electricity Access Project + 2006 + P Papua New Guinea Improved Energy Access for Rural Communities + 2012 + R Republic of Yemen Energy Access Project + 2006 + S Sri Lanka Credit to Connect + 2011 + T Tanzania Energy Development and Access Expansion Project + 2007 + V Viet Nam Rural Electrification + 2009 +

350

Center for Nanoscale Materials User Access Program Overview  

NLE Websites -- All DOE Office Websites (Extended Search)

Materials User Access Program Overview Materials User Access Program Overview CNM User Access Program Overview 1. Objective ............................................................................................................................................... 1 2. Submission Guidelines .......................................................................................................................... 1 2.1 Proposal Content ............................................................................................................................ 1 3. Proposal Review Process ....................................................................................................................... 2 3.1 Proposal Evaluation Board .............................................................................................................. 2

351

Environment/Health/Safety/Security (EHSS): Building Access  

NLE Websites -- All DOE Office Websites (Extended Search)

Building Access Building Access Access Control - On-site access is controlled by either keys or by LBNL's automated access control system. LBNL's automated access control system is used for exterior perimeter doors to most buildings, as well as some individual labs, offices, and equipment. The access system is linked to the LBNL Human Resources PeopleSoft database and is updated with the employees' or affiliates' current appointment status at the Laboratory. . If your LBNL appointment end date has expired, then your access will be suspended. Security Access Managers (SAM) Administrators - LBNL's automated access control system is a decentralized access permission control structure managed by each Division or major program via Security Access Managers (SAM) Administrators and In-putters. Go here for the current

352

An empirical comparison of monitoring algorithms for access anomaly detection  

Science Conference Proceedings (OSTI)

One of the major disadvantages of parallel programming with shared memory is the nondeterministic behavior caused by uncoordinated access to shared variables, known as access anomalies. Monitoring program execution to detect access anomalies ...

A. Dinning; E. Schonberg

1990-02-01T23:59:59.000Z

353

Web accessibility testing: when the method is the culprit  

Science Conference Proceedings (OSTI)

Testing accessibility of a web site is still an art. Lack of appropriate definitions of accessibility and of standard testing methods are some of the reasons why Web accessibility is so difficult to achieve The paper describes a heuristic walkthrough ...

Giorgio Brajnik

2006-07-01T23:59:59.000Z

354

Effects of grit roughness and pitch oscillations on the S814 airfoil  

DOE Green Energy (OSTI)

Horizontal-axis wind turbine rotors experience unsteady aerodynamics when the rotor is yawed, when rotor blades pass through the support tower wake, and when the wind is gusting. An understanding of this unsteady behavior is necessary to assist in the design of new rotor airfoils. The rotors also experience performance degradation due to surface roughness. These surface irregularities are due to the accumulation of insect debris, ice, and/or the aging process. Wind tunnel studies that examine both the steady and unsteady behavior of airfoils can help define pertinent flow phenomena, and the resultant data can also be used to validate analytical computer codes. An S814 airfoil model was tested in The Ohio State University Aeronautical and Astronautical Research Laboratory (OSU/AARL) 3 X 5 subsonic wind tunnel (3 X 5) under steady flow with both stationary model conditions and pitch oscillations. To study the extent of performance loss due to surface roughness, a leading edge grit roughness pattern (LEGR) was used to simulate leading edge contamination. After baseline cases were completed, the LEGR was applied for both steady state and model pitch oscillation cases. The Reynolds numbers for steady state conditions were 0.75, 1, 1.25 and 1.5 million, while the angle of attack ranged from -20{degrees} to +40{degrees}. While the model underwent pitch oscillations, data were acquired at Reynolds numbers of 0.75, 1, 1.25, and 1.5 million, at frequencies of 0.6, 1.2, and 1.8 Hz. Two sine wave forcing functions {+-}5.5{degrees} and {+-}10{degrees}, were used; at mean angles of attack of 8{degrees}, 14{degrees}, and 20{degrees}. For purposes herein, any reference to unsteady conditions means the model was in pitch oscillation.

Janiszewska, J.M.; Ramsay, R.R.; Hoffmann, M.J.; Gregorek, G.M. [Ohio State Univ., Columbus, OH (United States)

1996-07-01T23:59:59.000Z

355

EFFECTS OF GRAPHITE SURFACE ROUGHNESS ON BYPASS FLOW COMPUTATIONS FOR AN HTGR  

SciTech Connect

Bypass flow in a prismatic high temperature gas reactor (HTGR) occurs between graphite blocks as they sit side by side in the core. Bypass flow is not intentionally designed to occur in the reactor, but is present because of tolerances in manufacture, imperfect installation and expansion and shrinkage of the blocks from heating and irradiation. It is desired to increase the knowledge of the effects of such flow, which has been estimated to be as much as 20% of the total helium coolant flow. Computational fluid dynamic (CFD) simulations can provide estimates of the scale and impacts of bypass flow. Previous CFD calculations have examined the effects of bypass gap width, level and distribution of heat generation and effects of shrinkage. The present contribution examines the effects of graphite surface roughness on the bypass flow for different relative roughness factors on three gap widths. Such calculations should be validated using specific bypass flow measurements. While such experiments are currently underway for the specific reference prismatic HTGR design for the next generation nuclear plant (NGNP) program of the U. S. Dept. of Energy, the data are not yet available. To enhance confidence in the present calculations, wall shear stress and heat transfer results for several turbulence models and their associated wall treatments are first compared for flow in a single tube that is representative of a coolant channel in the prismatic HTGR core. The results are compared to published correlations for wall shear stress and Nusselt number in turbulent pipe flow. Turbulence models that perform well are then used to make bypass flow calculations in a symmetric onetwelfth sector of a prismatic block that includes bypass flow. The comparison of shear stress and Nusselt number results with published correlations constitutes a partial validation of the CFD model. Calculations are also compared to ones made previously using a different CFD code. Results indicate that increasing surface roughness increases the maximum fuel and helium temperatures as do increases in gap width. However, maximum coolant temperature variation due to increased gap width is not changed by surface roughness.

Rich Johnson; Yu-Hsin Tung; Hiroyuki Sato

2011-07-01T23:59:59.000Z

356

Experimental investigation of electric field distributions in a chaotic 3D microwave rough billiard  

E-Print Network (OSTI)

We present the first experimental study of the electric field distributions E_N of a three-dimensional (3D) microwave chaotic rough billiard with the translational symmetry. The translational symmetry means that the cross-section of the billiard is invariant under translation along z direction. The 3D electric field distributions were measured up to the level number N = 489. In this way the experimental spatial correlation functions C_{N,p}(x,s) ~ were found and compared with the theoretical ones. The experimental results for higher two-dimensional level number N_{|} appeared to be in good agreement with the theoretical predictions.

Oleg Tymoshchuk; Nazar Savytskyy; Oleh Hul; Szymon Bauch; Leszek Sirko

2009-03-17T23:59:59.000Z

357

Artificial Neural Network and Rough Set for HV Bushings Condition Monitoring  

E-Print Network (OSTI)

Most transformer failures are attributed to bushings failures. Hence it is necessary to monitor the condition of bushings. In this paper three methods are developed to monitor the condition of oil filled bushing. Multi-layer perceptron (MLP), Radial basis function (RBF) and Rough Set (RS) models are developed and combined through majority voting to form a committee. The MLP performs better that the RBF and the RS is terms of classification accuracy. The RBF is the fasted to train. The committee performs better than the individual models. The diversity of models is measured to evaluate their similarity when used in the committee.

Mpanza, LJ

2011-01-01T23:59:59.000Z

358

Ant Colony Optimization of Rough Set for HV Bushings Fault Detection  

E-Print Network (OSTI)

Most transformer failures are attributed to bushings failures. Hence it is necessary to monitor the condition of bushings. In this paper three methods are developed to monitor the condition of oil filled bushing. Multi-layer perceptron (MLP), Radial basis function (RBF) and Rough Set (RS) models are developed and combined through majority voting to form a committee. The MLP performs better that the RBF and the RS is terms of classification accuracy. The RBF is the fasted to train. The committee performs better than the individual models. The diversity of models is measured to evaluate their similarity when used in the committee.

Mpanza, J L

2011-01-01T23:59:59.000Z

359

NBP RFI: Data Access Honeywell Responses To Request for Information...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

on Implementing the National Broadband Plan by Empowering Consumers and the Smart Grid: Data Access, Third Party Use, and Privacy NBP RFI: Data Access Honeywell Responses To...

360

RE: NBP RFI: Data Access | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

RE: NBP RFI: Data Access RE: NBP RFI: Data Access Comments from Building Owners and Managers Association International on DOE Request for Information-Implementing the National...

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Public Roundtable- Data Access and Privacy Issues Related to...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Roundtable- Data Access and Privacy Issues Related to Smart Grid Technologies Public Roundtable- Data Access and Privacy Issues Related to Smart Grid Technologies Transcript of...

362

RE: NBP RFI: Data Access | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

RE: NBP RFI: Data Access RE: NBP RFI: Data Access Comments from Southern California Edison on DOE Request for Information-Implementing the National Broadband Plan by Empowering...

363

Environment/Health/Safety/Security (EHSS): Site Access  

NLE Websites -- All DOE Office Websites (Extended Search)

Site Access Office Site Access Office Contact Information | Feedback Most-viewed links: Badging Getting a badge - new, stolen, or replacement. Building Access On-site access, key requests, Security Access Managers. Visitor Access Visitor passes, general information. Parking at the Lab Permits, parking map, vehicles registration, parking policy. Other information: FAQ Frequently Asked Questions. Foreign National Access Information on access to DOE sites. Gate Information Information on the different Lab gates. Getting to the Lab Directions and options for getting to Berkeley Lab: buses, carpooling, rapid transit, biking. Guest House Guest House information. Lost and Found Lost and found information and contacts. Meeting and Conference Meeting and conference procedures and general information.

364

Wind Access and Permitting Law | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Access and Permitting Law Wind Access and Permitting Law < Back Eligibility Residential Savings Category Wind Buying & Making Electricity Program Info State Delaware Program Type...

365

Green Button Energy Data Access Expanding Across America | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Green Button Energy Data Access Expanding Across America Green Button Energy Data Access Expanding Across America October 17, 2012 - 6:01pm Addthis Utilities demonstrating the...

366

Re~ Request for Information NBP RFI: Data Access | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

for Information NBP RFI: Data Access Re Request for Information NBP RFI: Data Access Xcel Energy, a combination electricity and natural gas utility operating in eight Midwestern...

367

Request for Information NBP RFI: Data Access | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

for Information NBP RFI: Data Access Request for Information NBP RFI: Data Access Xcel Energy, a combination electricity and natural gas utility operating in eight Midwestern...

368

Reading Systems for eBooks Need to Become Accessible  

Science Conference Proceedings (OSTI)

Reading Systems for eBooks Need to Become Accessible. While the Publication Structure 1.0 spec is accessible, the reading systems are not. ...

2001-05-25T23:59:59.000Z

369

V-149: Microsoft Internet Explorer Object Access Bug Lets Remote...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

9: Microsoft Internet Explorer Object Access Bug Lets Remote Users Execute Arbitrary Code V-149: Microsoft Internet Explorer Object Access Bug Lets Remote Users Execute Arbitrary...

370

Solar access of residential rooftops in four California cities  

E-Print Network (OSTI)

the solar access of rooftop solar-energy systems, includingthermal collection by rooftop solar-energy equipment. It canthe solar access of rooftop solar-energy systems, including

Levinson, Ronnen

2010-01-01T23:59:59.000Z

371

Public Roundtable- Data Access and Privacy Issues Related to...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Public Roundtable- Data Access and Privacy Issues Related to Smart Grid Technologies Public Roundtable- Data Access and Privacy Issues Related to Smart Grid Technologies Transcript...

372

Rail Access Modes and Catchment Areas for the BART System  

E-Print Network (OSTI)

parking supplies), ridership (e.g. , rail modal splits), andof California at Berkeley Rail Access Modes and CatchmentHypothesized Distributions of Rail Station Access Modes as a

Cervero, Robert

1995-01-01T23:59:59.000Z

373

City of Boulder - Solar Access Ordinance (Colorado) | Open Energy...  

Open Energy Info (EERE)

solar access ordinance guarantees access, or "solar fences," to sunlight for homeowners and renters in the city. This is done by setting limits on the amount of permitted...

374

ORISE Resources: Equal Access Initiative Computer Grants Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Equal Access Initiative Computer Grants Program The Equal Access Initiative Computer Grants Program is sponsored by the National Minority AIDS Council (NMAC) and the National...

375

V-120: EMC Smarts Network Configuration Manager Java RMI Access...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

0: EMC Smarts Network Configuration Manager Java RMI Access Control Flaw Lets Remote Users Gain Full Control V-120: EMC Smarts Network Configuration Manager Java RMI Access Control...

376

T-592: Cisco Security Advisory: Cisco Secure Access Control System...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

2: Cisco Security Advisory: Cisco Secure Access Control System Unauthorized Password Change Vulnerability T-592: Cisco Security Advisory: Cisco Secure Access Control System...

377

Test Procedure for §170.302 (p) Emergency Access  

Science Conference Proceedings (OSTI)

... September 24, 2010 1 Test Procedure for §170.302 (p) Emergency Access ... 170.302(p) Emergency Access. Permit authorized users ...

2013-11-06T23:59:59.000Z

378

Uniform Transboundary Pollution Reciprocal Access Act (Montana) |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Uniform Transboundary Pollution Reciprocal Access Act (Montana) Uniform Transboundary Pollution Reciprocal Access Act (Montana) Uniform Transboundary Pollution Reciprocal Access Act (Montana) < Back Eligibility Utility Fed. Government Commercial Agricultural Investor-Owned Utility State/Provincial Govt Industrial Construction Municipal/Public Utility Local Government Installer/Contractor Rural Electric Cooperative Tribal Government Institutional Fuel Distributor Transportation Program Info State Montana Program Type Environmental Regulations This Act allows any entity in a Reciprocating Jurisdiction harmed by pollution originating in the state of Montana to bring an action or other proceeding against the source of that pollution in the state of Montana. Such an entity has the same rights in the state of Montana as they would if

379

NBP RFI: Data Access | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

NBP RFI: Data Access NBP RFI: Data Access NBP RFI: Data Access The National Rural Electric Cooperative Association (NRECA) is the national service organization representing more than 900 not-for-profit, member-owned rural electric cooperatives ("Cooperatives"). Most of NRECA's members are distribution cooperatives, providing retail electric service to more than 42 million consumers in 47 states. NRECA members also include approximately 66 generation and transmission ("G&T") cooperatives that supply wholesale power to their distribution cooperative member-owners. Cooperatives provide service to approximately 75 percent of the nation's land mass, resulting in a consumer density of just seven consumers per mile of line, significantly less density than that of

380

Notices Electronic Access to This Document:  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

805 Federal Register 805 Federal Register / Vol. 77, No. 67 / Friday, April 6, 2012 / Notices Electronic Access to This Document: The official version of this document is the document published in the Federal Register. Free Internet access to the official edition of the Federal Register and the Code of Federal Regulations is available via the Federal Digital System at: www.gpo.gov/fdsys. At this site you can view this document, as well as all other documents of this Department published in the Federal Register, in text or Adobe Portable Document Format (PDF). To use PDF you must have Adobe Acrobat Reader, which is available free at the site. You may also access documents of the Department published in the Federal Register by using the article search feature at: www.federalregister.gov.

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Security and Access Policy Security of and access to campus facilities, including campus residences  

E-Print Network (OSTI)

Security and Access Policy Security of and access to campus facilities, including campus residences facilities. Residence halls are secured 24 hours a day. Over extended breaks, the doors of all residence halls will be secured around the clock. Some facilities may have individual hours, which may vary

Escher, Christine

382

Quantum internet using code division multiple access  

E-Print Network (OSTI)

A crucial open problem in large-scale quantum networks is how to efficiently transmit quantum data among many pairs of users via a common data-transmission medium. We propose a solution by developing a quantum code division multiple access (q-CDMA) approach in which quantum information is chaotically encoded to spread its spectral content, and then decoded via chaos synchronization to separate different sender-receiver pairs. In comparison to other existing approaches, such as frequency division multiple access (FDMA), the proposed q-CDMA can greatly increase the information rates per channel used, especially for very noisy quantum channels.

Jing Zhang; Yu-xi Liu; Sahin Kaya Ozdemir; Re-Bing Wu; Feifei Gao; Xiang-Bin Wang; Lan Yang; Franco Nori

2012-04-08T23:59:59.000Z

383

Codeposition on hot CVD surfaces: Particle dynamics and deposit roughness interactions  

SciTech Connect

To capture in a tractable manner essential coupling effects in CVD systems when particles generated in thermal boundary layers also deposit, a film theory was developed that predicts simultaneous vapor and particle deposition rates at a hot deposition surface. The codeposition rate prediction method also calculates for the first time the corresponding solid deposit roughness using recently published results of particle-level simulations. For the numerical illustrations, the growth of TiO{sub 2}(s) films by the codeposition of titanium tetra-isopropoxide vapor and film-nucleated/grown TiO{sub 2} particles (generated in the thermal boundary layer) was considered. Experimental rate data for this system are available. The continuum and particle-level simulation methods provide: the interplay of vapor precursor kinetics, particle nucleation, growth, coagulation and diffusion in determining the complex ``structure`` of such multiphase chemically reacting boundary layers; wall deposition rates of both surviving vapors and film-nucleated particles; and the ``self-consistent`` microstructure (surface roughness) of the resulting solid deposit. Timely and tractable generalizations are discussed in the light of recent results for the transport properties and stability of ``fractal-like`` aggregated particles.

Tandon, P.; Rosner, D.E. [Yale Univ., New Haven, CT (United States)

1996-06-01T23:59:59.000Z

384

Adhesive contact of rough surfaces: comparison between numerical calculations and analytical theories  

E-Print Network (OSTI)

We have employed a numerical procedure to analyze the adhesive contact between a soft elastic layer and a rough rigid substrate. The solution of the problem is obtained by calculating the Green's function which links the pressure distribution to the normal displacements at the interface. The problem is then formulated in the form of a Fredholm integral equation of the first kind with a logarithmic kernel, and the boundaries of the contact area are calculated by requiring that the energy of the system is stationary. The methodology has been employed to study the adhesive contact between an elastic semi-infinite solid and a randomly rough rigid profile with a self-affine fractal geometry. We show that, even in presence of adhesion, the true contact area still linearly depends on the applied load. The numerical results are then critically compared with the prediction of an extended version of the Persson's contact mechanics theory, able to handle anisotropic surfaces, as 1D interfaces. It is shown that, for any ...

Carbone, Giuseppe; Tartaglino, Ugo; 10.1140/epje/i2009-10508-5

2010-01-01T23:59:59.000Z

385

Access to recorded interviews: A research agenda  

Science Conference Proceedings (OSTI)

Recorded interviews form a rich basis for scholarly inquiry. Examples include oral histories, community memory projects, and interviews conducted for broadcast media. Emerging technologies offer the potential to radically transform the way in which recorded ... Keywords: Interviews, access technology, oral history, speech indexing, spoken word archives

Franciska De Jong; Douglas W. Oard; Willemijn Heeren; Roeland Ordelman

2008-06-01T23:59:59.000Z

386

Open Access and UK universities: an introduction  

E-Print Network (OSTI)

both Gold and Green OA options but with a preference for Gold (= immediate access and maximum opportunity for re-use) • Preferred Green embargos: max. 6 months (STEM) & 12 months (A/H/SS) – but 12 /24 months are acceptable during transition period...

Morgan, Peter

2013-05-17T23:59:59.000Z

387

Tolerating data access latency with register preloading  

Science Conference Proceedings (OSTI)

By exploiting fine grain parallelism, superscalar processors can potentially increase the performance of future supercomputers. However, supercomputers typically have a long access delay to their first level memory which can severely restrict the performance ... Keywords: VLIW/superscalar processor, data dependence analysis, load latency, register file, register preload

William Y. Chen; Scott A. Mahlke; Wen-mei W. Hwu; Tokuzo Kiyohara; Pohua P. Chang

1992-08-01T23:59:59.000Z

388

Securing network access in wireless sensor networks  

Science Conference Proceedings (OSTI)

In wireless sensor networks, it is critical to restrict the network access only to eligible sensor nodes, while messages from outsiders will not be forwarded in the networks. In this paper, we present the design, implementation, and evaluation of a secure ... Keywords: elliptic curve cryptography, security, sensor networks

Kun Sun; An Liu; Roger Xu; Peng Ning; Douglas Maughan

2009-03-01T23:59:59.000Z

389

Providing Access to High Performance Computing Technologies  

E-Print Network (OSTI)

Providing Access to High Performance Computing Technologies Jack Dongarra 1 , Shirley Browne 2 to high performance computing technologies. One effort, the National HPCC Software Exchange, is providing scientists involved with High Performance Computing and Communications (HPCC) [1] 3 . The NHSE facilitates

Dongarra, Jack

390

Consumer Devices for eCommerce Access  

Science Conference Proceedings (OSTI)

It is widely predicted that electronic commerce will have a far-reaching impact on businesses in the next few years. For this to occur it will be essential that users are able to access and use eCommerce services when and where they wish, at times and ...

M. C. Revett; G. J. South

1999-07-01T23:59:59.000Z

391

Creating home network access for the elderly  

Science Conference Proceedings (OSTI)

Wireless broadband networks for home environment present us with many challenges unfamiliar in more public settings. At home, we encounter the end-users with little ICT experience. Probably among the most challenging members of the home network are the ... Keywords: accessibility, authentication, home networks, security, usability, user interface design

Kristiina Karvonen

2007-07-01T23:59:59.000Z

392

Speed control system for an access gate  

DOE Patents (OSTI)

An access control apparatus for an access gate. The access gate typically has a rotator that is configured to rotate around a rotator axis at a first variable speed in a forward direction. The access control apparatus may include a transmission that typically has an input element that is operatively connected to the rotator. The input element is generally configured to rotate at an input speed that is proportional to the first variable speed. The transmission typically also has an output element that has an output speed that is higher than the input speed. The input element and the output element may rotate around a common transmission axis. A retardation mechanism may be employed. The retardation mechanism is typically configured to rotate around a retardation mechanism axis. Generally the retardation mechanism is operatively connected to the output element of the transmission and is configured to retard motion of the access gate in the forward direction when the first variable speed is above a control-limit speed. In many embodiments the transmission axis and the retardation mechanism axis are substantially co-axial. Some embodiments include a freewheel/catch mechanism that has an input connection that is operatively connected to the rotator. The input connection may be configured to engage an output connection when the rotator is rotated at the first variable speed in a forward direction and configured for substantially unrestricted rotation when the rotator is rotated in a reverse direction opposite the forward direction. The input element of the transmission is typically operatively connected to the output connection of the freewheel/catch mechanism.

Bzorgi, Fariborz M. (Knoxville, TN)

2012-03-20T23:59:59.000Z

393

5.3 Identity Management - Data Access Authorization Policy ...  

Science Conference Proceedings (OSTI)

****WORKING DOCUMENT****. 5.3 Identity Management - Data Access Authorization Policy Management in the Cloud. ...

2010-11-02T23:59:59.000Z

394

An access control model for dynamic client-side content  

Science Conference Proceedings (OSTI)

The focus of access control in client/server environments is on protecting sensitive server resources by determining whether or not a client is authorized to access those resources. The set of resources are usually static, and an access control policy ... Keywords: access control, authentication, credentials, trust negotiation

Adam Hess; Kent E. Seamons

2003-06-01T23:59:59.000Z

395

Chemistry Central Journal Commentary Open access and medicinal chemistry  

E-Print Network (OSTI)

This is an Open Access article distributed under the terms of the Creative Commons Attribution License

Chris Swain; Chris Swain

2007-01-01T23:59:59.000Z

396

Guidelines for Handling Confidential Information by Remote Access  

E-Print Network (OSTI)

Guidelines for Handling Confidential Information by Remote Access You have signed an OHSU of your access to OHSU electronic information and/or other sanctions. Remember, using remote access of the OHSU facilities. When you are utilizing remote access, you must provide the same level of security used

Chapman, Michael S.

397

NIST Offering Free Access to Standards for First Responders  

Science Conference Proceedings (OSTI)

NIST Offering Free Access to Standards for First Responders. From NIST Tech Beat: April 26, 2011. ...

2011-04-26T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Neighborhood Electric Neighborhood Electric Vehicle (NEV) Access to Roadways to someone by E-mail Share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Facebook Tweet about Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Twitter Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Google Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Delicious Rank Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Digg Find More places to share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on AddThis.com... More in this section... Federal State

402

Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Neighborhood Electric Neighborhood Electric Vehicle (NEV) Access to Roadways to someone by E-mail Share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Facebook Tweet about Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Twitter Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Google Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Delicious Rank Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Digg Find More places to share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on AddThis.com... More in this section... Federal State

403

Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Neighborhood Electric Neighborhood Electric Vehicle (NEV) Access to Roadways to someone by E-mail Share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Facebook Tweet about Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Twitter Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Google Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Delicious Rank Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Digg Find More places to share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on AddThis.com... More in this section... Federal State

404

Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Neighborhood Electric Neighborhood Electric Vehicle (NEV) Access to Roadways to someone by E-mail Share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Facebook Tweet about Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Twitter Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Google Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Delicious Rank Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Digg Find More places to share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on AddThis.com... More in this section... Federal State

405

Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Neighborhood Electric Neighborhood Electric Vehicle (NEV) Access to Roadways to someone by E-mail Share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Facebook Tweet about Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Twitter Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Google Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Delicious Rank Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Digg Find More places to share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on AddThis.com... More in this section... Federal State

406

Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Neighborhood Electric Neighborhood Electric Vehicle (NEV) Access to Roadways to someone by E-mail Share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Facebook Tweet about Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Twitter Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Google Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Delicious Rank Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Digg Find More places to share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on AddThis.com... More in this section... Federal State

407

Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Neighborhood Electric Neighborhood Electric Vehicle (NEV) Access to Roadways to someone by E-mail Share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Facebook Tweet about Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Twitter Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Google Bookmark Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Delicious Rank Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on Digg Find More places to share Alternative Fuels Data Center: Neighborhood Electric Vehicle (NEV) Access to Roadways on AddThis.com... More in this section... Federal State

408

Query Evaluation in the Presence of Fine-grained Access Control.  

E-Print Network (OSTI)

??Access controls are mechanisms to enhance security by protecting data from unauthorized accesses. In contrast to traditional access controls that grant access rights at the… (more)

Zhang, Huaxin

2008-01-01T23:59:59.000Z

409

A study of pitch oscillation and roughness on airfoils used for horizontal axis wind turbines  

DOE Green Energy (OSTI)

Under subcontract XF-1-11009-3 the Ohio State University Aeronautical and Astronautical Research Laboratory (OSU/AARL) with the National Renewable Energy Laboratory (NREL) developed an extensive database of empirical aerodynamic data. These data will assist in the development of analytical models and in the design of new airfoils for wind turbines. To accomplish the main objective, airfoil models were designed, built and wind tunnel tested with and without model leading edge grit roughness (LEGR). LEGR simulates surface irregularities due to the accumulation of insect debris, ice, and/or the aging process. This report is a summary of project project activity for Phase III, which encompasses the time period from September 17, 1 993 to September 6, 1 994.

Gregorek, G.M.; Hoffmann, M.J.; Ramsay, R.R.; Janiszewska, J.M. [Ohio State Univ., Columbus, OH (United States)

1995-12-01T23:59:59.000Z

410

Experimental and theoretical studies of friction and heat transfer in rough passages  

SciTech Connect

This document discusses activities during this reporting period. A paper based on the results presented in the first final report (DOE/CE/90029-2) and entitled The Role of Transition in Determining Friction and Heat Transfer in Smooth and Rough Passages'' was published in the October issue (Volume 33) of the International Journal of Heat and Mass Transfer. Beginning with the minimum objectives established at the outset of the period covered by this report, the general picture can be summed up as follows: detailed heat transfer and pressure drop (with and without heating) measurements with the smooth tube, fabrication of the eleven (enhanced tube) heat transfer test sections, tests with two of the three Hitachi tubes, and the construction of the liquid test facility were completed. In short, the minimum objectives were, for the most part, accomplished satisfactorily. 6 refs., 10 figs., 1 tab.

Obot, N.T.; Esen, E.B.

1990-12-01T23:59:59.000Z

411

Numerical study of roughness distributions in nonlinear models of interface growth  

E-Print Network (OSTI)

We analyze the shapes of roughness distributions of discrete models in the Kardar, Parisi and Zhang (KPZ) and in the Villain, Lai and Das Sarma (VLDS) classes of interface growth, in one and two dimensions. Three KPZ models in d=2 confirm the expected scaling of the distribution and show a stretched exponential tail approximately as exp[-x^(0.8)], with a significant asymmetry near the maximum. Conserved restricted solid-on-solid models belonging to the VLDS class were simulated in d=1 and d=2. The tail in d=1 has the form exp(-x^2) and, in d=2, has a simple exponential decay, but is quantitatively different from the distribution of the linear fourth-order (Mullins-Herring) theory. It is not possible to fit any of the above distributions to those of 1/f^\\alpha noise interfaces, in contrast with recently studied models with depinning transitions.

Fabio D. A. Aarão Reis

2005-08-09T23:59:59.000Z

412

Water-waves modes trapped in a canal by a body with the rough surface  

E-Print Network (OSTI)

The problem about a body in a three dimensional infinite channel is considered in the framework of the theory of linear water-waves. The body has a rough surface characterized by a small parameter $\\epsilon>0$ while the distance of the body to the water surface is also of order $\\epsilon$. Under a certain symmetry assumption, the accumulation effect for trapped mode frequencies is established, namely, it is proved that, for any given $d>0$ and integer $N>0$, there exists $\\epsilon(d,N)>0$ such that the problem has at least $N$ eigenvalues in the interval $(0,d)$ of the continuous spectrum in the case $\\epsilon\\in(0,\\epsilon(d,N)) $. The corresponding eigenfunctions decay exponentially at infinity, have finite energy, and imply trapped modes.

G. Cardone; T. Durante; S. A. Nazarov

2009-10-06T23:59:59.000Z

413

Fluid flow analysis in a rough fracture (type II) using complex networks and lattice Boltzmann method  

E-Print Network (OSTI)

Complexity of fluid flow in a rough fracture is induced by the complex configurations of opening areas between the fracture planes. In this study, we model fluid flow in an evolvable real rock joint structure, which under certain normal load is sheared. In an experimental study, information regarding about apertures of the rock joint during consecutive 20 mm displacements and fluid flow (permeability) in different pressure heads have been recorded by a scanner laser. Our aim in this study is to simulate the fluid flow in the mentioned complex geometries using the lattice Boltzmann method (LBM), while the characteristics of the aperture field will be compared with the modeled fluid flow permeability To characterize the aperture, we use a new concept in the graph theory, namely: complex networks and motif analysis of the corresponding networks. In this approach, the similar aperture profile along the fluid flow direction is mapped in to a network space. The modeled permeability using the LBM shows good correlat...

Ghaffari, H; Sharifzadeh, M; Young, R P

2011-01-01T23:59:59.000Z

414

Organic photosensitive cells grown on rough electrode with nano-scale morphology control  

DOE Patents (OSTI)

An optoelectronic device and a method for fabricating the optoelectronic device includes a first electrode disposed on a substrate, an exposed surface of the first electrode having a root mean square roughness of at least 30 nm and a height variation of at least 200 nm, the first electrode being transparent. A conformal layer of a first organic semiconductor material is deposited onto the first electrode by organic vapor phase deposition, the first organic semiconductor material being a small molecule material. A layer of a second organic semiconductor material is deposited over the conformal layer. At least some of the layer of the second organic semiconductor material directly contacts the conformal layer. A second electrode is deposited over the layer of the second organic semiconductor material. The first organic semiconductor material is of a donor-type or an acceptor-type relative to the second organic semiconductor material, which is of the other material type.

Yang, Fan (Piscataway, NJ); Forrest, Stephen R. (Ann Arbor, MI)

2011-06-07T23:59:59.000Z

415

Chamber Surface Roughness and Electron Cloud for the Advanced Photon Source Superconducting Undulator  

E-Print Network (OSTI)

The electron cloud is a possible heat source in the superconducting undulator (SCU) designed for the Advanced Photon Source (APS), a 7-GeV electron synchrotron radiation source at Argonne National Laboratory. In electron cloud generation extensive research has been done, and is continuing, to understand the secondary electron component. However, little work has been done to understand the parameters of photoemission in the accelerator environment. To better understand the primary electron generation in the APS; a beamline at the Australian Light Source synchrotron was used to characterize two samples of the Al APS vacuum chamber. The total photoelectron yield and the photoemission spectra were measured. Four parameters were varied: surface roughness, sample temperature, incident photon energy, and incident photon angle, with their results presented here.

Boon, Laura

2013-01-01T23:59:59.000Z

416

Light emitting diode with high aspect ratio submicron roughness for light extraction and methods of forming  

DOE Patents (OSTI)

The surface morphology of an LED light emitting surface is changed by applying a reactive ion etch (RIE) process to the light emitting surface. High aspect ratio, submicron roughness is formed on the light emitting surface by transferring a thin film metal hard-mask having submicron patterns to the surface prior to applying a reactive ion etch process. The submicron patterns in the metal hard-mask can be formed using a low cost, commercially available nano-patterned template which is transferred to the surface with the mask. After subsequently binding the mask to the surface, the template is removed and the RIE process is applied for time duration sufficient to change the morphology of the surface. The modified surface contains non-symmetric, submicron structures having high aspect ratio which increase the efficiency of the device.

Li, Ting (Ventura, CA)

2011-04-26T23:59:59.000Z

417

Light emitting diode with high aspect ratio submicron roughness for light extraction and methods of forming  

SciTech Connect

The surface morphology of an LED light emitting surface is changed by applying a reactive ion etch (RIE) process to the light emitting surface. High aspect ratio, submicron roughness is formed on the light emitting surface by transferring a thin film metal hard-mask having submicron patterns to the surface prior to applying a reactive ion etch process. The submicron patterns in the metal hard-mask can be formed using a low cost, commercially available nano-patterned template which is transferred to the surface with the mask. After subsequently binding the mask to the surface, the template is removed and the RIE process is applied for time duration sufficient to change the morphology of the surface. The modified surface contains non-symmetric, submicron structures having high aspect ratio which increase the efficiency of the device.

Li, Ting

2013-08-13T23:59:59.000Z

418

Surface roughness effects on the solar reflectance of cool asphalt shingles  

Science Conference Proceedings (OSTI)

We analyze the solar reflectance of asphalt roofing shingles that are covered with pigmented mineral roofing granules. The reflecting surface is rough, with a total area approximately twice the nominal area. We introduce a simple analytical model that relates the 'micro-reflectance' of a small surface region to the 'macro-reflectance' of the shingle. This model uses a mean field approximation to account for multiple scattering effects. The model is then used to compute the reflectance of shingles with a mixture of different colored granules, when the reflectances of the corresponding mono-color shingles are known. Simple linear averaging works well, with small corrections to linear averaging derived for highly reflective materials. Reflective base granules and reflective surface coatings aid achievement of high solar reflectance. Other factors that influence the solar reflectance are the size distribution of the granules, coverage of the asphalt substrate, and orientation of the granules as affected by rollers during fabrication.

Akbari, Hashem; Berdahl, Paul; Akbari, Hashem; Jacobs, Jeffry; Klink, Frank

2008-02-17T23:59:59.000Z

419

Effects of grit roughness and pitch oscillations on the LS(1)-0417MOD airfoil  

DOE Green Energy (OSTI)

Horizontal axis wind turbine rotors experience unsteady aerodynamics due to wind shear when the rotor is yawed, when rotor blades pass through the support tower wake, and when the wind is gusting. An understanding of this unsteady behavior is necessary to assist in the calculations of rotor performance and loads. The rotors also experience performance degradation caused by surface roughness. These surface irregularities are due to the accumulation of insect debris, ice, and/or the aging process. Wind tunnel studies that examine both the steady and unsteady behavior of airfoils can help define pertinent flow phenomena, and the resultant data can be used to validate analytical computer codes. An LS(l)-0417MOD airfoil model was tested in The Ohio State University Aeronautical and Astronautical Research Laboratory (OSU/AARL) 3{times}5 subsonic wind tunnel (3{times}5) under steady flow and stationary model conditions, as well as with the model undergoing pitch oscillations. To study the possible extent of performance loss due to surface roughness, a standard grit pattern (LEGR) was used to simulate leading edge contamination. After baseline cases were completed, the LEGR was applied for both steady state and model pitch oscillation cases. The Reynolds numbers for steady state conditions were 0.75, 1, 1.25, and 1.5 million, while the angle of attack ranged from {minus}20{degrees} to +40{degrees}. With the model undergoing pitch oscillations, data were acquired at Reynolds numbers of 0.75, 1, 1.25, and 1.5 million, at frequencies of 0.6, 1.2, and 1.8 Hz. Two sine wave forcing functions were used, {plus_minus} 5.5%{degrees} and {plus_minus} 10{degrees}, at mean angles of attack of 8{degrees}, 14{degrees}, and 20{degrees}. For purposes herein, any reference to unsteady conditions foil model was in pitch oscillation about the quarter chord.

Janiszewska, J.M.; Ramsay, R.R.; Hoffman, M.J.; Gregorek, G.M. [Ohio State Univ., Columbus, OH (United States)

1996-01-01T23:59:59.000Z

420

Effects of grit roughness and pitch oscillations on the LS(1)-0421MOD airfoil  

DOE Green Energy (OSTI)

An LS(1)-0421 MOD airfoil model was tested in The Ohio State University Aeronautical and Astronautical Research Laboratory (OSU/AARL) 3{times}5 subsonic wind tunnel (3{times}5) under steady flow and stationary model conditions, and also with the model undergoing pitch oscillations. In order to study the possible extent of performance loss due to surface roughness, a leading edge grit roughness (LEGR) pattern was developed to simulate leading edge contamination. After baseline cases were completed, the LEGR was applied for both steady state and model pitch oscillation cases. The Reynolds numbers for steady state conditions were 0.75, 1, and 1.25 million, while the angle of attack ranged from {minus}10{degrees} to +40{degrees}. With the model undergoing pitch oscillations, data was acquired at Reynolds numbers of 0.75, 1, 1.25, and 1.5 million, at frequencies of 0.6, 1.2, and 1.8 Hz. Two sine wave forcing functions were used; {plus_minus} 5.5{degrees} and {plus_minus} 10{degrees}, at mean angles of attack of 8{degrees}, 14{degrees}, and 20{degrees}. For this report, unsteady conditions refer to the model in pitch oscillation. In general, the maximum unsteady lift coefficient was from 10% to 50% higher than the steady state maximum lift coefficient. Variation in the quarter chord pitching moment coefficient was nearly two times greater than steady state values at high angles of attack. These findings indicate the importance of considering the unsteady flow behavior occurring in wind turbine operation for accurate load estimates.

Reuss, R.L.; HOffman, M.J.; Gregorek, G.M. [Ohio State Univ., Columbus, OH (United States)

1995-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Effects of grit roughness and pitch oscillations on the S815 airfoil  

DOE Green Energy (OSTI)

Horizontal axis wind turbine rotors experience unsteady aerodynamics due to wind shear when the rotor is yawed, when rotor blades pass through the support tower wake, and when the wind is gusting. An understanding of this unsteady behavior is necessary to assist in the calculation of rotor performance and loads. The rotors also experience performance degradation due to surface roughness. These surface irregularities are cause by the accumulation of insect debris, ice, and the aging process. Wind tunnel studies that examine both the steady and unsteady behavior of airfoils can help define pertinent flow phenomena, and the resultant data can be used to validate analytical computer codes. A S815 airfoil model was tested in The Ohio State University Aeronautical and Astronautical Research Laboratory (OSU/AARL) 3 x 5 subsonic wind tunnel (3 x 5) under steady flow and stationary model conditions, as well as with the model undergoing pitch oscillations. To study the possible extent of performance loss due to surface roughness, a standard grit pattern (LEGR) was used to simulate leading edge contamination. After baseline cases were completed, the LEGR was applied for both steady state and model pitch oscillation cases. The Reynolds numbers used for steady state conditions were 0.75, 1, 1.25, and 1.4 million, while the angle of attack ranged from {minus}20{degree} to +40{degree}. With the model undergoing pitch oscillations, data were acquired at Reynolds numbers of 0.75, 1, 1.25, and 1.4 million, at frequencies of 0.6, 1.2, and 1.8 Hz. Two sine wave forcing functions were used; {+-}5.5{degree} and {+-}10{degree}, at mean angles of attack of 8{degree}, 14{degree}, and 20{degree}. For purposes herein, any reference to unsteady conditions means that the model was in pitch oscillation about the quarter chord.

Reuss Ramsay, R.; Hoffman, M.J.; Gregorek, G.M. [Ohio State Univ., Columbus, OH (United States)

1996-07-01T23:59:59.000Z

422

Surface Roughness of Stainless Steel Bender Mirrors for FocusingSoft X-rays  

Science Conference Proceedings (OSTI)

We have used polished stainless steel as a mirror substrate to provide focusing of soft x-rays in grazing incidence reflection. The substrate is bent to an elliptical shape with large curvature and high stresses in the substrate require a strong elastic material. Conventional material choices of silicon or of glass will not withstand the stress required. The use of steel allows the substrates to be polished and installed flat, using screws in tapped holes. The ultra-high-vacuum bender mechanism is motorized and computer controlled. These mirrors are used to deliver focused beams of soft x-rays onto the surface of a sample for experiments at the Advanced Light Source (ALS). They provide an illumination field that can be as small as the mirror demagnification allows, for localized study, and can be enlarged, under computer control,for survey measurements over areas of the surface up to several millimeters. The critical issue of the quality of the steel surface, polished and coated with gold, which limits the minimum achievable focused spot size is discussed in detail. Comparison is made to a polished, gold coated, electroless nickel surface, which provides a smoother finish. Surface measurements are presented as power spectral densities, as a function of spatial frequency. The surface height distributions measured with an interferometric microscope, and complemented by atomic force microscope measurements, are used to compute power spectral densities and then to evaluate the surface roughness. The effects of roughness in reducing the specular reflectivity are verified by soft x-ray measurements.

Yashchuk, Valeriy V.; Gullikson, Eric M.; Howells, Malcolm R.; Irick, Steve C.; MacDowell, Alastair A.; McKinney, Wayne R.; Salmassi,Farhad; Warwick, Tony; Metz, James P.; Tonnessen, Thomas W.

2005-10-11T23:59:59.000Z

423

Effects of grit roughness and pitch oscillations on the S801 airfoil  

DOE Green Energy (OSTI)

Horizontal axis wind turbine rotors experience unsteady aerodynamics due to wind shear when the rotor is yawed, when rotor blades pass through the support tower wake, and when the wind is gusting. An understanding of this unsteady behavior is necessary to assist in the calculation of rotor performance and loads. The rotors also experience performance degradation due to surface roughness. These surface irregularities are due to the accumulation of insect debris, ice, and the aging process. Wind tunnel studies that examine both the steady and unsteady behavior of airfoils can help define pertinent flow phenomena, and the resultant data can be used to validate analytical computer codes. A S801 airfoil model was tested in The Ohio State University Aeronautical and Astronautical Research Laboratory (OSU/AARL) 3x5 subsonic wind tunnel (3x5) under steady flow and stationary model conditions, as well as with the model undergoing pitch oscillations. To study the possible extent of performance loss due to surface roughness, a standard grit pattern (LEGR) was used to simulate leading edge contamination. After baseline cases were completed, the LEGR was applied for both steady state and model pitch oscillation cases. The Reynolds numbers used for steady state conditions were 0.75, 1, 1.25, and 1.5 million, while the angle of attack ranged from -20{degrees} to +40{degrees}. With the model undergoing pitch oscillations, data were acquired at Reynolds numbers of 0.75, 1, 1.25, and 1.4 million, at frequencies of 0.6, 1.2, and 1.8 Hz. Two sine wave forcing functions were used, {plus_minus} 5.5 {degrees}and {plus_minus} 10{degrees}, at mean angles of attack of 8{degrees} 14{degrees} and 20{degrees} For purposes herein, any reference to unsteady conditions means that the airfoil model was in pitch oscillation about the quarter chord.

Ramsay, R.R.; Hoffman, M.J.; Gregorek, G.M. [Ohio State Univ., Columbus, OH (United States)

1996-01-01T23:59:59.000Z

424

Pricing and Security of ResidentialPricing and Security of Residential Broadband AccessBroadband Access  

E-Print Network (OSTI)

and Department of Electrical Engineering Pennsylvania State University kesidis@engr.psu.edu Carlos Kirjner McKinsey and Company, New York Carlos_Kirjner@Mckinsey.com #12;2 OutlineOutline Growth in residential broadband access

Yener, Aylin

425

Executive Order 12968 Access to Classified Information  

NLE Websites -- All DOE Office Websites (Extended Search)

40243 40243 Monday August 7, 1995 Part IV The President Executive Order 12968-Access to Classified Information Presidential Determination No. 95-32 of July 28, 1995 Presidential Determination No. 95-33 of July 31, 1995 Presidential Documents 40245 Federal Register Vol. 60, No. 151 Monday, August 7, 1995 Title 3- The President Executive Order 12968 of August 2, 1995 Access to Classified Information The national interest requires that certain information be maintained in confidence through a system of classification in order to protect our citizens, our democratic institutions, and our participation within the community of nations. The unauthorized disclosure of information classified in the national interest can cause irreparable damage to the national security and loss of human life.

426

NSLS User Access | Requesting Beam Time  

NLE Websites -- All DOE Office Websites (Extended Search)

Requesting Beam Time Requesting Beam Time Use one of the following options depending on your research: General User Proposal General User proposals are peer reviewed for scientific merit by a Proposal Review Panel (PRP). General User proposals compete for beamtime with other General User Proposals based on scientific merit. Once the original proposal and beam time request is reviewed and rated in the PASS System, additional beam time requests can be submitted against the original proposal for its lifetime, a period of up to six cycles (two years). Data taken during experiments associated with a General User proposal is considered to be in the public domain. There is no charge for General User beamtime. Rapid Access Rapid Access proposals are a subset of General User proposals available for

427

Accounts & Access | Argonne Leadership Computing Facility  

NLE Websites -- All DOE Office Websites (Extended Search)

Account Information Accounts and Access FAQ Connect & Log In Using CRYPTOCards SSH Keys on Surveyor Disk Space Quota Management Allocations Decommissioning of BG/P Systems and Resources Blue Gene/Q Versus Blue Gene/P Mira/Cetus/Vesta Intrepid/Challenger/Surveyor Tukey Eureka / Gadzooks Policies Documentation Feedback Please provide feedback to help guide us as we continue to build documentation for our new computing resource. [Feedback Form] Accounts & Access Account Information Account Information: All computing carried out on the ALCF systems is associated with a user "account." This account is used to log onto the login servers and run jobs on the resources. Using CRYPTOcards Using CRYPTOCards: Useful information to guide you in using and troubleshooting your CRYPTOcard.

428

Easy Access to Energy Improvement Funds  

NLE Websites -- All DOE Office Websites (Extended Search)

EASY ACCESS TO ENERGY IMPROVEMENT EASY ACCESS TO ENERGY IMPROVEMENT FUNDS IN THE PUBLIC SECTOR Are you postponing the installation of energy efficiency projects because the money is not in your current budget? Do you find yourself weighing the benefits of installing energy efficiency equipment today against the hassles and expense of requesting new or additional debt? Are energy efficiency projects being delayed because you are understaffed? If you answered "YES" to any of these questions, you will be happy to know there are several simple, fast, legal, and well-tested financing alternatives that may address your concerns. In the public sector, two of the most popular mechanisms for financing energy efficiency projects are performance contracts and tax- exempt lease-purchase agreements. A

429

Safety testing for LHC access system  

E-Print Network (OSTI)

In the domain of Safety Real-Time Systems the problem of testing represents always a big effort in terms of time, costs and efficiency to guarantee an adequate coverage degree. Exhaustive tests may, in fact, not be practicable for large and distributed systems. This paper describes the testing process followed during the validation of the CERN's LHC Access System [1], responsible for monitoring and preventing physical risks for the personnel accessing the underground areas. In the paper we also present a novel strategy for the testing problem, intended to drastically reduce the time for the test patterns generation and execution. In particular, we propose a methodology for blackbox testing that relies on the application of Model Checking techniques. Model Checking is a formal method from computer science, commonly adopted to prove correctness of systemâ??s models through an automatic systemâ??s state space exploration against some property formulas.

Valentini, F; Ninin, P; Scibile, S

2008-01-01T23:59:59.000Z

430

Open Access Transmission and Renewable Energy Technologies  

Science Conference Proceedings (OSTI)

In April 1996, the Federal Regulatory Commission (PERC) approved Orders 888 and 889 and released a draft rule for public comment on capacity reservation tariffs (CRTs). Order No. 888 requires electric utilities to file transmission tariffs that would allow transmission access to third parties who want to conduct wholesale transactions, and Order No. 889 requires transmission-owning utilities to set up open access, same-time information systems (OASIS), using commercial software and Internet protocols. This paper discusses these Orders in detail, as well as some of the issues before FERC with implications for renewables, which include: transmission pricing; transmission terms and conditions; reassignment of transmission capacity; defining state and FERC jurisdiction over transmission and distribution; the pricing of ancillary services; and the adoption and implementation of independent system operators.

Porter, K.

1996-09-01T23:59:59.000Z

431

Accessibility in 5-Axis Milling Environment  

E-Print Network (OSTI)

Using algorithms from computer graphics, namely hidden line and surface removal, techniques have been constructed to derive the 3-axis visible or millable set of a computer model from a given orientation or simulate and verify machining toolpaths. In this paper, an approach that reduces the accessibility problem of 5-axis milling using a flat end tool into a 3-axis accessibility problem is discussed. Using this approach, global detection of possible gouging into other parts, while a 5-axis flat end mill is in use, is made feasible and collisions can be avoided. Key Words: NURBs, accessibility, 5-axis machining. 1 Introduction Several methods are in use, when freeform computer models are realized using milling machines. Possibly the most common approach utilizes a ball end tool with three degrees of freedom, namely translation in x, y, and z [1, 2, 4, 5, 6, 7]. The ball end center of the tool follows an offset [8] to the model by the tool radius while the ball end surface is tangent to...

Gershon Elber

1997-01-01T23:59:59.000Z

432

Enhanced electron transport in dye-sensitized solar cells using short ZnO nanotips on a rough metal anode.  

DOE Green Energy (OSTI)

Many efforts have been directed toward the enhancement of electron transport in dye-sensitized solar cells (DSSC) using one-dimensional nanoarchitectured semiconductors. However, the improvement resulting from these ordered 1-D nanostructured electrodes is often offset or diminished by the deterioration in other device parameters intrinsically associated with the use of these 1-D nanostructures, such as the two-sided effect of the length of the nanowires impacting the series resistance and roughness factor. In this work, we mitigate this problem by allocating part of the roughness factor to the collecting anode instead of imparting all the roughness factors onto the semiconductor layer attached to the anode. A microscopically rough Zn microtip array is used as an electron-collecting anode on which ZnO nanotips are grown to serve as the semiconductor component of the DSSC. For the same surface roughness factor, our Zn-microtip|ZnO-nanotip DSSC exhibits an enhanced fill factor compared with DSSCs that have ZnO nanowires supported by a planar anode. In addition, the open-circuit voltage of the Zn-microtip|ZnO-nanotip DSSC is also improved due to a favorable band shift at the Zn-ZnO interface, which raises the Fermi level of the semiconductor and consequently enlarges the energy gap between the quasi-Fermi level of ZnO and the redox species. With these improvements, the overall efficiency becomes 1.4% with an open-circuit voltage of 770 mV, while the surface roughness factor of ZnO is approximately 60. Electrochemical impedance spectroscopic study reveals that the electron collection time is much shorter than the electron lifetime, suggesting that fast electron collection occurs in our device due to the significantly reduced electron collection distance along the short ZnO nanotips. The overall improvement demonstrates a new approach to enhance the efficiency of dye-sensitized solar cells.

Yang, Z.; Xu, T.; Ito, Y.; Welp, U.; Kwok, W. K.; Materials Science Division; Northern Illinois Univ.

2009-10-22T23:59:59.000Z

433

Alternative Fuels Data Center: Access to State Alternative Fueling Stations  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Access to State Access to State Alternative Fueling Stations to someone by E-mail Share Alternative Fuels Data Center: Access to State Alternative Fueling Stations on Facebook Tweet about Alternative Fuels Data Center: Access to State Alternative Fueling Stations on Twitter Bookmark Alternative Fuels Data Center: Access to State Alternative Fueling Stations on Google Bookmark Alternative Fuels Data Center: Access to State Alternative Fueling Stations on Delicious Rank Alternative Fuels Data Center: Access to State Alternative Fueling Stations on Digg Find More places to share Alternative Fuels Data Center: Access to State Alternative Fueling Stations on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Access to State Alternative Fueling Stations

434

Tech. Rep. MSSU-COE-ERC-00-13, Engineering Research Center, Mississippi State University, 2000. Decoding of Large Terrains Using a Hardware Rendering Pipeline  

E-Print Network (OSTI)

the transmission and storage of enormous quantities of data [?]. For example, the application of interest of a digital elevation map (DEM) providing a 3D terrain surface; coupled to this 3D surface is an image mosaic between grid points of the DEM are generated. With larger DEMs, the sheer number of polygons can overwhelm

Fowler, James E.

435

Quarterly Journal of the Royal Meteorological Society Q. J. R. Meteorol. Soc. 136: 593616, April 2010 Part A Summer monsoon convection in the Himalayan region: Terrain  

E-Print Network (OSTI)

2010 Part A Summer monsoon convection in the Himalayan region: Terrain and land cover effects Socorro summer monsoon, convection occurs frequently near the Himalayan foothills. However, the nature-resolution numerical simulations and available observations from two case-studies and of the monsoon climatology

Niyogi, Dev

436

Influence of initial and boundary conditions for ozone modeling in very complex terrains: A case study in the northeastern Iberian Peninsula  

Science Conference Proceedings (OSTI)

Initial (IC) and boundary conditions (BC) are required in order to solve the set of stiff differential equations included in air quality models. In this work, the influences of IC-BC are analyzed in the northeastern Iberian Peninsula (NEIP) by applying ... Keywords: Air quality modeling, Complex terrains, Initial and boundary conditions, Ozone, Photochemistry

Pedro Jiménez; René Parra; José M. Baldasano

2007-09-01T23:59:59.000Z

437

The Effect of Topographic Variability on Initial Condition Sensitivity of Low-Level Wind Forecasts. Part II: Experiments Using Real Terrain and Observations  

Science Conference Proceedings (OSTI)

A study by Bieringer et al., which is Part I of this two-part study, demonstrated analytically using the shallow-water equations and numerically in controlled experiments that the presence of terrain can result in an enhancement of sensitivities ...

Paul E. Bieringer; Peter S. Ray; Andrew J. Annunzio

2013-07-01T23:59:59.000Z

438

Block-Iterative Method of Solving the Nonhydrostatic Pressure in Terrain-Following Coordinates: Two-Level Pressure and Truncation Error Analysis  

Science Conference Proceedings (OSTI)

A technique for the treatment of the pressure in anelastic, nonhydrostatic terrain-following coordinates is described. It involves the use of two levels of pressure in such a manner so as to ensure that the anelastic mass-continuity equation is ...

Terry L. Clark

2003-07-01T23:59:59.000Z

439

Incorporation of Stratification Effects on the Oceanic Roughness Length in the Derivation of the Neutral Drag Coefficient  

Science Conference Proceedings (OSTI)

Based on the assumption that, over the sea, the roughness length of the wind profile scales with the wind stress, a new formulation that describes the drag coefficient as a function of the given neutral drag coefficient and stability is derived. ...

Gerald Geernaert; Kristina B. Katsaros

1986-09-01T23:59:59.000Z

440

Effluent Quality Prediction of Wastewater Treatment Plant Based on Fuzzy-Rough Sets and Artificial Neural Networks  

Science Conference Proceedings (OSTI)

Effluent ammonia-nitrogen (NH3-N), chemical oxygen demand (COD) and total nitrogen (TN) removals are the most common environmental and process performance indicator for all types of wastewater treatment plants (WWTPs). In this paper, a soft computing ... Keywords: neural network, fuzzy rough sets, input variable selection, wastewater treatment, prediction, soft computing

Fei Luo; Ren-hui Yu; Yu-ge Xu; Yan Li

2009-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

GEOPHYSICAL RESEARCH LETTERS, VOL. 28, NO. 5, PAGES 811-814, MARCH 1, 2001 Parameterizing Tidal Dissipation over Rough  

E-Print Network (OSTI)

ocean, the energy flux carried by internal waves generated over rough topog- raphy dominates the energy that the inclusion of this dissipation mechanism improves hydro- dynamical models of the ocean tide. It also issues. The first is whether including a parameterization for internal wave energy-flux in a model

Jayne, Steven

442

Alternative Fuels Data Center: Public Access to State Compressed Natural  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Public Access to State Public Access to State Compressed Natural Gas (CNG) Fueling Stations to someone by E-mail Share Alternative Fuels Data Center: Public Access to State Compressed Natural Gas (CNG) Fueling Stations on Facebook Tweet about Alternative Fuels Data Center: Public Access to State Compressed Natural Gas (CNG) Fueling Stations on Twitter Bookmark Alternative Fuels Data Center: Public Access to State Compressed Natural Gas (CNG) Fueling Stations on Google Bookmark Alternative Fuels Data Center: Public Access to State Compressed Natural Gas (CNG) Fueling Stations on Delicious Rank Alternative Fuels Data Center: Public Access to State Compressed Natural Gas (CNG) Fueling Stations on Digg Find More places to share Alternative Fuels Data Center: Public Access to State Compressed Natural Gas (CNG) Fueling Stations on

443

Alternative Fuels Data Center: Limited Speed Vehicle Access to Roadways  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Limited Speed Vehicle Limited Speed Vehicle Access to Roadways to someone by E-mail Share Alternative Fuels Data Center: Limited Speed Vehicle Access to Roadways on Facebook Tweet about Alternative Fuels Data Center: Limited Speed Vehicle Access to Roadways on Twitter Bookmark Alternative Fuels Data Center: Limited Speed Vehicle Access to Roadways on Google Bookmark Alternative Fuels Data Center: Limited Speed Vehicle Access to Roadways on Delicious Rank Alternative Fuels Data Center: Limited Speed Vehicle Access to Roadways on Digg Find More places to share Alternative Fuels Data Center: Limited Speed Vehicle Access to Roadways on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Limited Speed Vehicle Access to Roadways A limited speed vehicle is defined as a vehicle that is capable of

444

Solar/Wind Access Policy | Open Energy Information  

Open Energy Info (EERE)

Solar/Wind Access Policy Solar/Wind Access Policy < Solar Jump to: navigation, search Solar and wind access laws are designed to establish a right to install and operate a solar or wind energy system at a home or other facility. Some solar access laws also ensure a system owner's access to sunlight. These laws may be implemented at both the state and local levels. In some states, access rights prohibit homeowners associations, neighborhood covenants and local ordinances from restricting a homeowner's right to use solar energy. Easements, the most common form of solar access law, allow for the rights to existing access to a renewable resource on the part of one property owner to be secured from an owner whose property could be developed in such a way as to restrict that resource. An easement is

445

Web accessibility compliance of government web sites in Korea  

Science Conference Proceedings (OSTI)

This paper introduces Korean web accessibility activities, such as relational laws, ordinances, policies, guidelines. It also presents analytical result of the investigation on web-contents accessibilities of the 39 Korean government agencies. The result ...

Joonho Hyun; Doojin Choi; Sukil Kim

2007-07-01T23:59:59.000Z

446

Re: NBP RFI: Data Access | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

the topics of data access, third party usage and privacy as they relate to consumers energy usage information and the Smart Grid. Re: NBP RFI: Data Access More Documents &...

447

Auctions to gas transmission access : the British experience  

E-Print Network (OSTI)

When access to monopoly owned networks is constrained auctioning access rights can increase the efficiency of allocations relative to negotiation and grandfathering when there is sufficient competition among network users. ...

McDaniel, Tanga

2002-01-01T23:59:59.000Z

448

Green Button: Providing Consumers with Access to Their Energy...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Green Button: Providing Consumers with Access to Their Energy Data Green Button: Providing Consumers with Access to Their Energy Data January 19, 2012 - 2:54pm Addthis Aneesh...

449

Foundation for a time interval access control model  

Science Conference Proceedings (OSTI)

A new model for representing temporal access control policies is introduced. In this model, temporal authorizations are represented by time attributes associated with both subjects and objects, and a “time interval access graph.” The time ...

Francis B. Afinidad; Timothy E. Levin; Cynthia E. Irvine; Thuy D. Nguyen

2005-09-01T23:59:59.000Z

450

Femtocell access control strategy in UMTS and LTE  

Science Conference Proceedings (OSTI)

Femtocells have become an attractive device for operators to offer extended services on their licensed UMTS/LTE spectrum. In this article we focus on the access control strategy -- a crucial aspect for operators to give preferential access to femtocells ...

Assen Golaup; Mona Mustapha; Leo Boonchin Patanapongpibul

2009-09-01T23:59:59.000Z

451

Questions_and_Answers_on_the_New_Access_Control_System  

NLE Websites -- All DOE Office Websites (Extended Search)

Questions and Answers on the New Access Control System for HQ Security Areas September 15, 2010 Question: Why is the current access control system to security areas being changed?...

452

Access Rate Control System | Y-12 National Security Complex  

NLE Websites -- All DOE Office Websites (Extended Search)

Access Rate Control System Access Rate Control System The mp4 video format is not supported by this browser. Download video Captions: On Time: 4:03 min Developed to support...

453

Effects of surface roughness and vortex generators on the NACA 4415 airfoil  

DOE Green Energy (OSTI)

Wind turbines in the field can be subjected to many and varying wind conditions, including high winds with rotor locked or with yaw excursions. In some cases the rotor blades may be subjected to unusually large angles of attack that possibly result in unexpected loads and deflections. To better understand loadings at unusual angles of attack, a wind tunnel test was performed. An 18-inch constant chord model of the NACA 4415 airfoil section was tested under two dimensional steady state conditions in the Ohio State University Aeronautical and Astronautical Research Laboratory (OSU/AARL) 7 x 10 Subsonic Wind Tunnel (7 x 10). The objective of these tests was to document section lift and moment characteristics under various model and air flow conditions. These included a normal angle of attack range of {minus}20{degree} to +40{degree}, an extended angle of attack range of {minus}60{degree} to +230{degree}, applications of leading edge grit roughness (LEGR), and use of vortex generators (VGs), all at chord Reynolds numbers as high as possible for the particular model configuration. To realistically satisfy these conditions the 7 x 10 offered a tunnel-height-to-model-chord ratio of 6.7, suggesting low interference effects even at the relatively high lift and drag conditions expected during the test. Significantly, it also provided chord Reynolds numbers up to 2.0 million. 167 figs., 13 tabs.

Reuss, R.L.; Hoffman, M.J.; Gregorek, G.M. [Ohio State Univ., Columbus, OH (United States)

1995-12-01T23:59:59.000Z

454

Comprehensive Evaluation Model of Building Energy Efficiency Based on Rough Sets Theory  

E-Print Network (OSTI)

In order to improve the objectivity of building energy efficiency evaluation, this paper uses a new method to evaluate building energy efficiency on the basis of rough sets theory. The contribution of different subentry evaluation indicators to comprehensive evaluation is calculated with the conception of attribute-significance, and then their weights are decided by using weighted normalization. According to characteristics of subentry evaluation indicators, their scores are conformed, in the end their comprehensive evaluation is calculated depending on sums of weight normalization. The model is validated by the swatches that are given on base of the software "DeST". It is concluded that the comprehensive evaluation on base of the model coincides with the result of the software " DeST ". The contribution of shape coefficient is most important among the different factors, and building orientation is next. The method by which weight can be decided with the conception "attribute- significance from RS cuts down man-made factors” interfere., and objective results can be obtained.

Ding, L.; Ruan, X.; Huang, J.; Li, Y.

2006-01-01T23:59:59.000Z

455

Image Formation by Incoherent and Coherent Transition Radiation from Flat and Rough Surfaces  

SciTech Connect

In this paper we derive equations for the image formation of transverse profile of a relativistic beam obtained by means of optical transition radiation (OTR) from flat and rough metal surfaces. The motivation behind this study lies in the desire to suppress coherent transition radiation (COTR) observed in experiments at modern free electron lasers. The physical mechanism behind the problem of COTR is that the OTR is predominantly radiated at small angles of order of 1/{gamma} where {gamma} is the relativistic factor of the beam. This means that the transverse formation size of the image is of order of {bar {lambda}}{gamma} where {bar {lambda}} = {lambda}/2{pi} with {lambda} the radiation wavelength. For relativistic beams this can be comparable or even exceed the transverse size of the beam, which would mean that the image of the beam has very little to do with its transverse profile. It is fortuitous, however, that the incoherent image is formed by adding radiation energy of electrons and results in the transverse formation size being of order of {bar {lambda}}/{theta}{sub a}, with {theta}{sub a} is the aperture angle of the optical system. The COTR image, in contrast, is formed by adding electromagnetic field of electrons, and leads to the formation size {bar {lambda}}{gamma}. In situations when the COTR intensity exceeds that of OTR the COTR imaging makes the diagnostic incapable of measuring the beam profile.

Stupakov, Gennady; /SLAC

2012-03-01T23:59:59.000Z

456

Rapid gravity and gravity gradiometry terrain correction via adaptive quadtree mesh discretization Kristofer Davis, M. Andy Kass, and Yaoguo Li, Center for Gravity, Electrical and Magnetic Studies, Colorado School  

E-Print Network (OSTI)

Rapid gravity and gravity gradiometry terrain correction via adaptive quadtree mesh discretization Kristofer Davis, M. Andy Kass, and Yaoguo Li, Center for Gravity, Electrical and Magnetic Studies, Colorado School of Mines SUMMARY We present a method for modeling the terrain response in gravity and gravity

457

Gender and lexical access in Bulgarian  

E-Print Network (OSTI)

Two procedures were used to explore the effects of semantic and grammatical gender on the recognition and processing of Bulgarian nouns, in relation to other factors that are known to affect lexical access. This study in a three-gender language was modeled on previous work in Italian, a two-gender language (Bates, Devescovi, Pizzamiglio, D’Amico, & Hernandez, 1995). Words were presented auditorily in randomized lists in two tasks: (1) repeat the word as quickly as possible and (2) determine the grammatical gender of the noun as soon as possible and indicate the decision by pressing a button. Reaction times in both tasks were influenced by phonological factors, word frequency, and irregularity of gender marking, but semantic and grammatical gender affected only gender monitoring. The significant contribution of semantic gender to processing in Bulgarian contrasts with previous findings for Italian. Also, we obtained an interaction between sex of the subject and noun gender, reflecting a bias toward one’s own grammatical gender “counterpart ” (especially for females). Reanalysis of the prior study in Italian showed a similar interaction but confirmed no effects of the semantic gender of the noun, suggesting that these two natural gender effects can dissociate. Possible reasons for cross-linguistic differences are discussed, with implications for comparative studies of gender and lexical access. Recently, there has been a surge of interest in the nature

Elena Andonova; Antonella Devescovi

2004-01-01T23:59:59.000Z

458

Context and Structure in Automated Full-Text Information Access  

E-Print Network (OSTI)

Context and Structure in Automated Full-Text Information Access Marti A. Hearst Report No. UCB 94720 #12;#12;Context and Structure in Automated Full-Text Information Access by Marti A. Hearst B and Structure in Automated Full-Text Information Access Copyright c 1994 by Marti A. Hearst #12;In memory of my

Hearst, Marti

459

Risk-based access control systems built on fuzzy inferences  

Science Conference Proceedings (OSTI)

Fuzzy inference is a promising approach to implement risk-based access control systems. However, its application to access control raises some novel problems that have not been yet investigated. First, because there are many different fuzzy operations, ... Keywords: access control, fuzzy inference, risk

Qun Ni; Elisa Bertino; Jorge Lobo

2010-04-01T23:59:59.000Z

460

Oblivious transfer with complex attribute-based access control  

Science Conference Proceedings (OSTI)

In this paper, we present oblivious transfer with complex attribute-based access control policies. The protocol allows a database server to directly enforce "and" and "or" access control policies (c11 ? c12 ... Keywords: access control, attribute-based encryption, oblivious transfer

Lingling Xu; Fangguo Zhang

2010-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Achieving distributed user access control in sensor networks  

Science Conference Proceedings (OSTI)

User access control in sensor networks defines a process of granting user an access right to the stored information. It is essential for future real sensor network deployment in which sensors may provide users with different services in terms of data ... Keywords: Elliptic Curve Cryptography, Public key cryptography, Sensor networks, User access control

Haodong Wang; Qun Li

2012-05-01T23:59:59.000Z

462

Trading in risk: using markets to improve access control  

Science Conference Proceedings (OSTI)

With the increasing need to securely share information, current access control systems are proving too in flexible and difficult to adapt. Recent work on risk-based access control systems has shown promise at resolving the inadequacies of traditional ... Keywords: market, risk, risk-based access control

Ian Molloy; Pau-Chen Cheng; Pankaj Rohatgi

2009-08-01T23:59:59.000Z

463

Precipitation over Concave Terrain  

Science Conference Proceedings (OSTI)

Many topographic barriers are comprised of a series of concave or convex ridges that modulate the intensity and distribution of precipitation over mountainous areas. In this model-based idealized study, stratiform precipitation associated with ...

Qingfang Jiang

2006-09-01T23:59:59.000Z

464

The Energy Access Situation in Developing Countries | Open Energy  

Open Energy Info (EERE)

Energy Access Situation in Developing Countries Energy Access Situation in Developing Countries Jump to: navigation, search Tool Summary Name: The Energy Access Situation in Developing Countries Agency/Company /Organization: World Health Organization (WHO), United Nations Development Programme (UNDP) Sector: Energy Focus Area: Renewable Energy, Biomass, Energy Efficiency Topics: Co-benefits assessment, - Energy Access, - Health Resource Type: Presentation, Technical report User Interface: Website Website: www.who.int/indoorair/publications/energyaccesssituation/en/index.html Cost: Free A Review focusing on the Least Developed Countries and Sub-Saharan Africa The "Energy Access Situation in Developing Countries - A Review focusing on the Least Developed Countries and Sub-Saharan Africa" report draws

465

City of Boulder - Solar Access Ordinance | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Access Ordinance Access Ordinance City of Boulder - Solar Access Ordinance < Back Eligibility Construction Residential Savings Category Heating & Cooling Commercial Heating & Cooling Solar Heating Buying & Making Electricity Water Heating Program Info State Colorado Program Type Solar/Wind Access Policy Provider City of Boulder The City of Boulder's solar access ordinance guarantees access, or "solar fences," to sunlight for homeowners and renters in the city. This is done by setting limits on the amount of permitted shading by new construction. A solar access permit is available to those who have installed or who plan to install a solar energy system and need more protection than is provided by the ordinance. For new developments, all units which are not planned to

466

UN-Energy-Measuring Energy Access | Open Energy Information  

Open Energy Info (EERE)

UN-Energy-Measuring Energy Access UN-Energy-Measuring Energy Access Jump to: navigation, search Tool Summary LAUNCH TOOL Name: UN-Energy-Measuring Energy Access Agency/Company /Organization: United Nations Energy Knowledge Network (UN-Energy) Sector: Energy Focus Area: Renewable Energy, Non-renewable Energy Topics: Co-benefits assessment, - Energy Access Resource Type: Dataset, Maps Website: www.un-energy.org/measuring-energy-access Cost: Free Language: English UN-Energy-Measuring Energy Access Screenshot References: UN-Energy-Measuring Energy Access[1] "A reliable and comprehensive information base is necessary to inform target-setting and to monitor outcomes. Openly available and visually attractive information presentation can support the design of innovative policies and measures, and underpin detailed analysis. UN-Energy, the

467

Alternative Fuels Data Center: Alternative Fuel Vehicle (AFV) Access to  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Alternative Fuel Alternative Fuel Vehicle (AFV) Access to Tunnels to someone by E-mail Share Alternative Fuels Data Center: Alternative Fuel Vehicle (AFV) Access to Tunnels on Facebook Tweet about Alternative Fuels Data Center: Alternative Fuel Vehicle (AFV) Access to Tunnels on Twitter Bookmark Alternative Fuels Data Center: Alternative Fuel Vehicle (AFV) Access to Tunnels on Google Bookmark Alternative Fuels Data Center: Alternative Fuel Vehicle (AFV) Access to Tunnels on Delicious Rank Alternative Fuels Data Center: Alternative Fuel Vehicle (AFV) Access to Tunnels on Digg Find More places to share Alternative Fuels Data Center: Alternative Fuel Vehicle (AFV) Access to Tunnels on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type

468

Mozambique-Biofuels, Land Access and Rural Livelihoods | Open Energy  

Open Energy Info (EERE)

Biofuels, Land Access and Rural Livelihoods Biofuels, Land Access and Rural Livelihoods Jump to: navigation, search Name Mozambique-Biofuels, Land Access and Rural Livelihoods Agency/Company /Organization International Institute for Environment and Development Sector Energy, Land Focus Area Biomass, - Biofuels, Forestry, Agriculture Topics Implementation, Co-benefits assessment, - Energy Access, Resource assessment, Background analysis Resource Type Publications, Case studies/examples Website http://www.iied.org/pubs/pdfs/ Country Mozambique UN Region Eastern Africa References Mozambique-Biofuels, Land Access and Rural Livelihoods[1] Mozambique-Biofuels, Land Access and Rural Livelihoods Screenshot Background "This report documents how the spread of biofuels is affecting land access for poorer groups in Mozambique, and what actions are being taken,

469

Access to Climate Change Technology by Developing Countries | Open Energy  

Open Energy Info (EERE)

Access to Climate Change Technology by Developing Countries Access to Climate Change Technology by Developing Countries Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Access to Climate Change Technology by Developing Countries Agency/Company /Organization: International Centre for Trade and Sustainable Development Sector: Energy, Land Focus Area: Renewable Energy Topics: Finance, Implementation Resource Type: Publications, Guide/manual Website: ictsd.org/downloads/2009/11/access-to-climate-change-technology-by-dev Access to Climate Change Technology by Developing Countries Screenshot References: Developing Country-Access to CC Tech[1] "The paper critically examines various approaches that have been suggested for achieving greater access to climate change technology by developing countries, including compulsory licensing, patent pools, patent databases

470

Access Energy Coop | Open Energy Information  

Open Energy Info (EERE)

Coop Coop Jump to: navigation, search Name Access Energy Coop Place Iowa Utility Id 16611 Utility Location Yes Ownership C NERC Location SERC NERC SERC Yes ISO Other Yes Activity Distribution Yes Alt Fuel Vehicle Yes Alt Fuel Vehicle2 Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png Interruptible Large Power Rate* Industrial Large Commercial Rate Commercial Large Power Rate Schedule Industrial Residential Single Phase Rate Residential Security Lights HPS 100 W Lighting Security Lights HPS 1000 W Lighting Security Lights HPS 250 W Lighting Security Lights HPS 400 W Lighting

471

Template for Discontinuation of Access Eligibility Determination  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

MEMORANDUM FOR (SUBJECT'S NAME) MEMORANDUM FOR (SUBJECT'S NAME) FROM: Personnel Security Program Manager SUBJECT: Discontinuation of Access Eligibility Determination Reference is made to your Questionnaire for National Security Positions (QNSP) signed [insert date], which was forwarded to this office in connection with a Department of Energy security clearance request. Your case was submitted to the Office of Personnel Management (OPM) and an investigation dated [insert date] has been received. [Insert a brief description of the circumstances such as: A review of your case reveals that you listed marijuana use 5-10 times from 8/01 to 5/05 on your QNSP. During the personal subject interview with OPM, you stated that the end date for the marijuana use was incorrect and the last time

472

Science Open Access Journals - Alerts Help  

Office of Scientific and Technical Information (OSTI)

SOAJ Alerts Fast Facts SOAJ Alerts Fast Facts You can easily create an alert right from the results page. Alerts run automatically, based on the schedule you choose. New relevantly ranked results are automatically sent to you through email or an individual or shared RSS/ATOM feed. There is no limit to the number of alerts you can create. Up to 6 previous sets of alert results may be accessed, with permanent links to the sources where possible. Selected results can be emailed, printed, or downloaded into a citation manager such as EndNote, RefWorks or Bib Tex. Alerts Help Alerts will make your recurring searches even easier by automating your search and sending you the results on a regular basis. To receive alerts on your topic(s) of interest, simply create an Alerts account, specify your

473

Effects of grit roughness and pitch oscillations on the NACA 4415 airfoil  

DOE Green Energy (OSTI)

A NACA 4415 airfoil model was tested in The Ohio State University Aeronautical and Astronautical Research Laboratory 3 x 5 subsonic wind tunnel under steady state and unsteady conditions. The test defined baseline conditions for steady state angles of attack from {minus}10{degree} to +40{degree} and examined unsteady behavior by oscillating the model about its pitch axis for three mean angles, three frequencies, and two amplitudes. For all cases, Reynolds numbers of 0.75, 1, 1.25, and 1.5 million were used. In addition, these were repeated after the application of leading edge grit roughness (LEGR) to determine contamination effects on the airfoil performance. Steady state results of the NACA 4415 testing at Reynolds number of 1.25 million showed a baseline maximum lift coefficient of 1.30 at 12.3{degree} angle of attack. The application of LEGR reduced the maximum lift coefficient by 20% and increased the 0.0090 minimum drag coefficient value by 62%. The zero lift pitching moment of {minus}0.0967 showed a 13% reduction in magnitude to {minus}0.0842 with LEGR applied. Data were also obtained for two pitch oscillation amplitudes: {+-}5.5{degree} and {+-}10{degree}. The larger amplitude consistently gave a higher maximum lift coefficient than the smaller amplitude, and both unsteady maximum lift coefficients were greater than the steady state values. Stall is delayed on the airfoil while the angle of attack is increasing, thereby causing an increase in maximum lift coefficient. A hysteresis behavior was exhibited for all the unsteady test cases. The hysteresis loops were larger for the higher reduced frequencies and for the larger amplitude oscillations. As in the steady case, the effect of LEGR in the unsteady case was to reduce the lift coefficient at high angles of attack. In addition, with LEGR, the hysteresis behavior persisted into lower angles of attack than for the clean case.

Hoffmann, M.J.; Reuss Ramsay, R.; Gregorek, G.M. [Ohio State Univ., Columbus, OH (United States)

1996-07-01T23:59:59.000Z

474

Effects of grit roughness and pitch oscillations on the S809 airfoil  

DOE Green Energy (OSTI)

An S809 airfoil model was tested in The Ohio State University Aeronautical and Astronautical Research Laboratory (OSU/AARL) 3{times}5 subsonic wind tunnel (3{times}5) under steady flow and stationary model conditions, and also with the model undergoing pitch oscillations. To study the possible extent of performance loss due to surface roughness, a standard grit pattern (LEGR) was developed to simulate leading edge contamination. After baseline cases were completed, the LEGR was applied for both steady state and model pitch oscillation cases. The Reynolds numbers for steady state conditions were 0.75, 1, 1.25, and 1.5 million, while the angle of attack ranged from {minus}20, to +40 {degrees}. With the model undergoing pitch oscillations, data were acquired at Reynolds numbers of 0.75, 1, 1.25, and 1.4 million, at frequencies of 0.6, 1.2, and 1.8 Hz. Two sine wave forcing functions were used; {plus_minus} 5.5{degrees} and {plus_minus} 10{degrees}, at mean angles of attack of 8{degrees}, 14{degrees}, and 20{degrees}. For purposes herein, any reference to unsteady conditions means the model was in pitch oscillation about the quarter chord. In general, the unsteady maximum lift coefficient was from 4% to 86% higher than the steady state maximum lift coefficient, and variation in the quarter chord pitching moment coefficient magnitude was from {minus}83% to 195% relative to steady state values at high angles of attack. These findings indicate the importance of considering the unsteady flow behavior occurring in wind turbine operation to obtain accurate load estimates.

Ramsay, R.F.; Hoffman, M.J.; Gregorek, G.M. [Ohio State Univ., Columbus, OH (United States)

1995-12-01T23:59:59.000Z

475

Effects of grit roughness and pitch oscillations on the S810 airfoil  

DOE Green Energy (OSTI)

An S810 airfoil model was tested in The Ohio State University Aeronautical and Astronautical Research Laboratory 3 x 5 subsonic wind tunnel under steady state and unsteady conditions. The test defined baseline conditions for steady state angles of attack from -20{degrees} to +40{degrees} and examined unsteady behavior by oscillating the model about its pitch axis for three mean angles, three frequencies, and two amplitudes. For all cases, Reynolds numbers of 0.75, 1, 1.25, and 1.5 million were used. In addition, the above conditions were repeated after the application of leading edge grit roughness (LEGR) to determine contamination effects on the airfoil performance. Baseline steady state results of the S810 testing showed a maximum lift coefficient of 1.15 at 15.2{degrees}angle of attack. The application of LEGR reduced the maximum lift coefficient by 12% and increased the 0.0085 minimum drag coefficient value by 88%. The zero lift pitching moment of -0.0286 showed a 16% reduction in magnitude to -0.0241 with LEGR applied. Data were also obtained for two pitch oscillation amplitudes: {plus_minus}5.5{degrees} and {plus_minus}10{degrees}. The larger amplitude consistently gave a higher maximum lift coefficient than the smaller amplitude and both sets of unsteady maximum lift coefficients were greater than the steady state values. Stall was delayed on the airfoil while the angle of attack was increasing, thereby causing an increase in maximum lift coefficient. A hysteresis behavior was exhibited for all the unsteady test cases. The hysteresis loops were larger for the higher reduced frequencies and for the larger amplitude oscillations. In addition to the hysteresis behavior, an unusual feature of these data were a sudden increase in the lift coefficient where the onset of stall was expected. As in the steady case, the effect of LEGR in the unsteady case was to reduce the lift coefficient at high angles of attack.

Ramsay, R.R.; Hoffman, M.J.; Gregorek, G.M. [Ohio State Univ., Columbus, OH (United States)

1996-01-01T23:59:59.000Z

476

Estimating solar access of typical residential rooftops: A case study in San Jose, CA  

E-Print Network (OSTI)

the solar access of rooftop solar-energy systems, includingthe solar access of rooftop solar-energy systems, includingof shading on residential rooftop solar access in various

Levinson, Ronnen M

2008-01-01T23:59:59.000Z

477

A KNOWLEDGE BASED SYSTEM FOR PROVIDING INTELLIGENT ACCESS TO A PETROLEUM USER DATABASE  

E-Print Network (OSTI)

INTELLIGENT ACCESS TO A PETROLEUM USER DATABASE StevenINTELLIGENT ACCESS TO A PETROLEUM USER DATABASE StevenINTELLIGENT ACCESS TO A PETROLEUM USER DATABASE Steven

Rosenberg, Steven

2011-01-01T23:59:59.000Z

478

T-606: Sun Java System Access Manager Lets Remote Users Partially...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

06: Sun Java System Access Manager Lets Remote Users Partially Modify Data and Remote Authenticated Users Partially Access Data T-606: Sun Java System Access Manager Lets Remote...

479

Elsevier Editorial System(tm) for Computer Vision and Image Understanding Manuscript Draft Manuscript Number: Title: Terrain Modelling from lidar range data in natural landscapes: a predictive and Bayesian framework Article Type: Special Issue: New Advanc  

E-Print Network (OSTI)

Abstract: The Earth's topography, including vegetation and human-made features, reduced to a virtual 3D representation is a key geographic layer for any extended development or risk management project. Processed from multiple aerial images, or from airborne lidar systems, the 3D topography is first represented as a point cloud. This article deals with the generation of Digital Terrain Models in natural landscapes. We present a global methodology for estimating the terrain height by deriving a predictive filter paradigm. Under the assumption that the terrain topography (elevation and slope) is regular in a neighbouring system, a predictive filter combines linearly the predicted topographic values and the effective measured values. In this paper, it is applied to 3D lidar data which are known to be of high altimetric accuracy. The algorithm generates an adaptive local geometry wherein the altimetric distribution of the point cloud is analysed. Since local terrain elevations depend on the local slope, a predictive filter is first applied on the slopes then on the terrain elevations. The algorithm propagates through the point cloud following specific rules in order to optimize the probability of computing areas containing terrain points. Considered as an initial surface, theprevious DTM is finally regularized in a Bayesian framework. Our approach is based on the definition of an energy function that manages the evolution of a terrain surface. The energy is designed as a compromise between a data attraction term and a regularization term. The minimum of this energy corresponds to the

unknown authors

2008-01-01T23:59:59.000Z

480

Surface Termination and Roughness of Ge(100) Cleaned by HF and HCl Solutions  

DOE Green Energy (OSTI)

Oxide removal from Ge(100) surfaces treated by HCl and HF solutions with different concentrations are systematically studied by synchrotron radiation photoelectron spectroscopy (SR-PES). SR-PES results show that clean surfaces without any oxide can be obtained after wet chemical cleaning followed by vacuum annealing with a residual carbon contamination of less than 0.02 monolayer. HF etching leads to a hydrogen terminated Ge surface whose hydrogen coverage is a function of the HF concentration. In contrast, HCl etching yields a chlorine terminated surface. Possible etching mechanisms are discussed. Surface roughness after HF and HCl treatments is also investigated by AFM, which shows that HF treatment leaves a rougher surface than HCl. Germanium (Ge) is increasingly being studied for MOSFET applications to take advantage of its high intrinsic electron and hole mobility. To fabricate high performance devices on Ge, it is essential to understand Ge surface chemistry and find an effective way to clean and passivate its surface. Although Si surface cleaning and passivation have been extensively studied, only recently has some research been done on Ge surfaces. Conventional XPS results show that HF etching removes Ge oxide and carbon contamination significantly, and HCl etching leads to a chlorine terminated Ge(111) surface, which only forms Ge monochloride. However, it is difficult to probe the details of the chemical nature of treated surfaces and quantify the surface termination and cleanness with conventional XPS, because of its limited surface sensitivity and resolution. In addition, little attention has been paid to the HF concentration, which turns out to be an important factor in the surface hydrogen passivation. In this work, we study the Ge(100) surfaces treated by aqueous HCl and HF solutions with three different concentrations by synchrotron radiation photoelectron spectroscopy (SR-PES) at Stanford Synchrotron Radiation Laboratory (SSRL). Using SR-PES, we can tune the photon energy to achieve very high surface sensitivity and good resolution, so the chemical states of treated surfaces can be resolved unambiguously, and the surface termination and cleanness can be quantified. We find that HF treatment results in a hydrogen terminated surface, and the hydrogen coverage depends on the HF concentration. In contrast, a Cl terminated Ge(100) surface is achieved after HCl treatment. Both monochloride and dichloride are formed on the surface. The termination difference between HF etching and HCl etching can be explained by the etching mechanism. In both cases, the residual carbon and oxygen after chemical etching can be removed by vacuum annealing.

Sun, Shiyu; /SLAC, SSRL

2005-10-10T23:59:59.000Z

Note: This page contains sample records for the topic "roughness terrain accessibility" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Measuring Energy Access: Supporting a Global Target | Open Energy  

Open Energy Info (EERE)

Measuring Energy Access: Supporting a Global Target Measuring Energy Access: Supporting a Global Target Jump to: navigation, search Tool Summary Name: Measuring Energy Access: Supporting a Global Target Agency/Company /Organization: Columbia University Sector: Energy Focus Area: Renewable Energy, Non-renewable Energy Topics: Co-benefits assessment, - Energy Access Resource Type: Publications Website: www.unido.org/fileadmin/user_media/Services/Energy_and_Climate_Change/ Cost: Free Language: English References: Measuring Energy Access: Supporting a Global Target[1] "This paper first describes the relevant context, definitions, data, and links to national policies and energy planning. Section 2 reviews relevant development and energy metrics. Several options for measuring energy access are then presented in section 3. Finally, Section 4 offers thoughts on

482

OpenEI:Utility data access map | Open Energy Information  

Open Energy Info (EERE)

Utility data access map Utility data access map Jump to: navigation, search Ret Utility Data Access Map Having access to your electricity use data is a very important step in understanding your overall energy usage. Comparing historical data to your current usage is one way to see trends and determine ways for reducing electricity costs and improving overall efficiency. We asked all U.S. electric utility companies to tell us how accessible their electricity use data is for both residential and commercial customers. The results are updated live based on the responses we have to date. As more utilities provide information, the utility boundaries will be automatically colored and the overall map will become more complete. Try searching for your utility company to see your electricity data access options.

483

Automotive Accessibility and Efficiency Meet in the Innovative MV-1 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Automotive Accessibility and Efficiency Meet in the Innovative MV-1 Automotive Accessibility and Efficiency Meet in the Innovative MV-1 Automotive Accessibility and Efficiency Meet in the Innovative MV-1 March 11, 2011 - 4:03pm Addthis The MV-1, a new wheelchair accessible, fuel-efficient vehicle | Photo Courtesy of Vehicle Production Group The MV-1, a new wheelchair accessible, fuel-efficient vehicle | Photo Courtesy of Vehicle Production Group Daniel B. Poneman Daniel B. Poneman Deputy Secretary of Energy Yesterday, the Department of Energy announced that we've now finalized a loan for nearly $50 million to the Vehicle Production Group - or VPG. The project will support the development and manufacturing of a new wheelchair accessible, fuel-efficient car, the MV-1, that will run on compressed natural gas instead of gasoline, produce low emissions, and create 900 jobs

484

Burkina Faso Energy Access Project | Open Energy Information  

Open Energy Info (EERE)

Faso Energy Access Project Faso Energy Access Project Jump to: navigation, search Name of project Burkina Faso Energy Access Project Location of project Burkina Faso Year initiated 2007 Organization World Bank Website http://documents.worldbank.org Coordinates 12.238333°, -1.561593° References Document[1] Energy Access Project aims to support Burkina Faso's efforts to increase access to, and use of energy services to improve living conditions in selected rural, peri-urban, and urban areas. The project includes the following components : increasing access to electricity services in the urban, peri-urban and rural areas; woodfuels supply management and inter-fuel substitution initiatives; and institutional strengthening, capacity development, and harmonization. References ↑ "Document"

485

Adjudicative Guidelines for Determining Eligibility for Access to  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Adjudicative Guidelines for Determining Eligibility for Access to Adjudicative Guidelines for Determining Eligibility for Access to Classified Information Adjudicative Guidelines for Determining Eligibility for Access to Classified Information Introduction. The following adjudicative guidelines are established for all U.S. government civilian and military personnel, consultants, contractors, employees of contractors, licensees, certificate holders or grantees and their employees and other individuals who require access to classified information. They apply to persons being considered for initial or continued eligibility for access to classified information, to include sensitive compartmented information and special access programs, and are to be used by government departments and agencies in all final clearance determinations. Government departments and agencies may also choose to

486

Definition: Open Access Same Time Information Service | Open Energy  

Open Energy Info (EERE)

Access Same Time Information Service Access Same Time Information Service Jump to: navigation, search Dictionary.png Open Access Same Time Information Service An electronic posting system that the Transmission Service Provider maintains for transmission access data and that allows all transmission customers to view the data simultaneously.[1] View on Wikipedia Wikipedia Definition Also Known As Open Access Same-Time Information System (OASIS) Related Terms transmission lines, transmission Service Provider, system, electricity generation, transmission line References ↑ Glossary of Terms Used in Reliability Standards An inli LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ne Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Open_Access_Same_Time_Information_Service&oldid=480308"

487

Overview of Access Authorization Process for Applicants, May, 2013 |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Overview of Access Authorization Process for Applicants, May, 2013 Overview of Access Authorization Process for Applicants, May, 2013 Overview of Access Authorization Process for Applicants, May, 2013 May, 2013 This overview will help individuals new to the process understand what it means to obtain and maintain a Department of Energy (DOE) security clearance or access authorization This overview will help individuals new to the process understand what it means to obtain and maintain a Department of Energy (DOE) security clearance or access authorization. You are a part of a select group of individuals who are being considered for access to classified information maintained by DOE. As you know, the protection of classified information is very important to our national security. Generally, classified information is official information or material that requires protection in

488

Using Microfinance to Expand Access to Energy Services | Open Energy  

Open Energy Info (EERE)

Using Microfinance to Expand Access to Energy Services Using Microfinance to Expand Access to Energy Services Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Using Microfinance to Expand Access to Energy Services Agency/Company /Organization: United States Agency for International Development Sector: Energy Focus Area: Renewable Energy Topics: Co-benefits assessment, - Energy Access, Finance Resource Type: Case studies/examples, Lessons learned/best practices, Publications Website: waterwiki.net/images/6/65/File_Energy_Summary_FINAL.pdf Language: English References: Using Microfinance to Expand Access to Energy Services[1] Logo: Using Microfinance to Expand Access to Energy Services "To carry out this research, SES and the SEEP Network invited MFIs in Africa, Asia, Latin America and the Caribbean (LAC) to participate in an

489

V-106: Citrix Access Gateway Unspecified Security Bypass Vulnerability |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

6: Citrix Access Gateway Unspecified Security Bypass 6: Citrix Access Gateway Unspecified Security Bypass Vulnerability V-106: Citrix Access Gateway Unspecified Security Bypass Vulnerability March 7, 2013 - 6:00am Addthis PROBLEM: A vulnerability has been reported in Citrix Access Gateway PLATFORM: Standard Edition 5.0.x prior to 5.0.4.223524. Versions 4.5.x and 4.6.x are not affected by this vulnerability ABSTRACT: A vulnerability has been reported in Citrix Access Gateway, which can be exploited by malicious people to bypass certain security restrictions. REFERENCE LINKS: Secunia Advisory SA52479 Security Tracker Alert ID 1028255 com/id/1028255 CVE-2013-2263 Citrix Knowledge Center IMPACT ASSESSMENT: High DISCUSSION: The vulnerability could allow an unauthenticated user to gain access to network resources. IMPACT:

490

IEA-Electricity Access Database | Open Energy Information  

Open Energy Info (EERE)

IEA-Electricity Access Database IEA-Electricity Access Database Jump to: navigation, search Tool Summary LAUNCH TOOL Name: IEA-Electricity Access Database Agency/Company /Organization: International Energy Agency (IEA) Topics: Co-benefits assessment, - Energy Access Resource Type: Dataset Website: www.iea.org/weo/electricity.asp Language: English IEA-Electricity Access Database Screenshot References: Electricity Access Database[1] "In a continuing effort to improve our understanding of the electrification process, we have updated, for the fifth time, the database on electrification rates that we first built for WEO-2002. The database shows detailed data on urban and rural electrification collected from industry, national surveys and international sources. Based on this updated analysis,

491

China: International Trade and WTO Accession  

E-Print Network (OSTI)

This Working Paper should not be reported as representing the views of the IMF. The views expressed in this Working Paper are those of the author(s) and do not necessarily represent those of the IMF or IMF policy. Working Papers describe research in progress by the author(s) and are published to elicit comments and to further debate. China’s increasing integration with the global economy has contributed to sustained growth in international trade. Its exports have become more diversified, and greater penetration of industrial country markets has been accompanied by a surge in China’s imports from all regions—especially Asia, where China plays an increasingly central role in regional specialization. Tariff reforms have been implemented in China since the 1980s; and, with its recent WTO accession, China has committed itself to additional reforms that are farreaching and challenging. Sustained implementation of these commitments would further deepen China’s international integration and generate benefits for most partner countries.

Thomas Rumbaugh; Nicolas Blancher; International Monetary; Fund Wp; Prepared Thomas Rumbaugh; Nicolas Blancher

2004-01-01T23:59:59.000Z

492

A survey on emerging broadband wireless access technologies  

Science Conference Proceedings (OSTI)

Wireless broadband technologies provide ubiquitous broadband access to wireless users, enabling services that were available only to wireline users. In this paper, we summarize emerging wireless broadband access technologies, ranging from WLANs to satellite ... Keywords: HAPs, HiperACCESS, HiperLAN, HiperMAN, IEEE 802.11, IEEE 802.16, IEEE 802.20, IEEE 802.22, Satellite, WLAN, WMAN, WWAN, WiBro, WiFi, WiMAX

Mehmet S. Kuran; Tuna Tugcu

2007-08-01T23:59:59.000Z

493

Adjudicative Guidelines for Determining Eligibility for Access to Classified Information  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Adjudicative Guidelines for Determining Eligibility for Adjudicative Guidelines for Determining Eligibility for Access to Classified Information 1. Introduction. The following adjudicative guidelines are established for all U.S. government civilian and military personnel, consultants, contractors, employees of contractors, licensees, certificate holders or grantees and their employees and other individuals who require access to classified information. They apply to persons being considered for initial or continued eligibility for access to classified information, to include sensitive compartmented information and special access programs, and are to be used by government departments and agencies in all final clearance determinations. Government departments and agencies may also choose to apply these

494

Role Based Access Control for the World Wide Web  

Science Conference Proceedings (OSTI)

... The other way to use RBAC/Web is to modify the UNIX Web server to call the RBAC/Web API to determine RBAC access. ...

495

Adding Attributes to Role-Based Access Control  

Science Conference Proceedings (OSTI)

... allow access if the subject is a teller working between ... Edward J. Coyne is a senior security engineer at Science ... Contact him at ed.coyne@va.gov. ...

2010-06-15T23:59:59.000Z

496

TMS and Springer Launch New and Innovative Open Access Journal  

Science Conference Proceedings (OSTI)

Oct 16, 2011... 2011 Conference & Exhibition (MS&T'11) in Columbus, Ohio, The journal will begin publishing in early 2012. Under the Open Access model, ...

497

Definition: Open Access Transmission Tariff | Open Energy Information  

Open Energy Info (EERE)

navigation, search Dictionary.png Open Access Transmission Tariff Electronic transmission tariff accepted by the U.S. Federal Energy Regulatory Commission requiring the...

498

OSTP Directs Federal Agencies to Increase Public Access to Scientific...  

Office of Scientific and Technical Information (OSTI)

OSTP Directs Federal Agencies to Increase Public Access to Scientific Publications open book The White House Office of Science and Technology Policy (OSTP) has issued a major...

499

Effect of memory access and caching on high performance computing.  

E-Print Network (OSTI)

??High-performance computing is often limited by memory access. As speeds increase, processors are often waiting on data transfers to and from memory. Classic memory controllers… (more)

Groening, James

2012-01-01T23:59:59.000Z

500

Utilization and fairness in spectrum assignment for opportunistic spectrum access  

E-Print Network (OSTI)

users’ channel availability and transmission power, which inits own channel availability and transmission constraints.transmission link or a broadcast access point. The channel availability

Peng, ChunYi; Zheng, Haitao; Zhao, Ben Y

2006-01-01T23:59:59.000Z