National Library of Energy BETA

Sample records for roughness terrain accessibility

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

    E-Print Network [OSTI]

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

    2005-01-01

    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 ...

  2. Wind assessment in complex terrain with the numeric model Aiolos implementation of the influence of roughness changes and stability

    E-Print Network [OSTI]

    Heinemann, Detlev

    to the influence of roughness changes and the thermal stratification. Wind potential assessments of two sites of roughness changes on the terrain surface and thermal stratification of the at- mosphere are taken a neutral thermal stratification situation is assumed. But for a north eu- ropean situation a light stable

  3. Bipedal Robotic Walking on Flat-Ground, Up-Slope and Rough Terrain with Human-Inspired Hybrid Zero Dynamics 

    E-Print Network [OSTI]

    Nadubettu Yadukumar, Shishir 1986-

    2012-12-10

    The thesis shows how to achieve bipedal robotic walking on flat-ground, up-slope and rough terrain by using Human-Inspired control. We begin by considering human walking data and find outputs (or virtual constraints) that, when calculated from...

  4. Rough-terrain mobile robot planning and control with application to planetary exploration

    E-Print Network [OSTI]

    Iagnemma, Karl David

    2001-01-01

    Future planetary exploration missions will require mobile robots to perform difficult tasks in highly challenging terrain, with limited human supervision. Current motion planning and control algorithms are not well suited ...

  5. Urbanizing terrains

    E-Print Network [OSTI]

    Romanos, Christoforos

    2008-01-01

    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, ...

  6. Design methods for cost-effective teams of mobile robots in uncertain terrain

    E-Print Network [OSTI]

    Michaluk, Nathaniel

    2014-01-01

    Conducting planetary exploration missions with mobile robots is expensive, with costs ranging from hundreds of millions to billions of dollars. Developing reliable robots to work remotely on rough, uncertain terrain is ...

  7. Minimalistic control of biped walking in rough terrain

    E-Print Network [OSTI]

    Iida, Fumiya

    Toward our comprehensive understanding of legged locomotion in animals and machines, the compass gait model has been intensively studied for a systematic investigation of complex biped locomotion dynamics. While most of ...

  8. Performance-Based Rough Terrain Navigation for Nonholonomic Mobile Robots

    E-Print Network [OSTI]

    Parker, Lynne E.

    , performance issues (e.g., robot safety, or geometric, time-based, and physics- based criteria) are adequately, such as robot safety, or geometric, time-based, and physics-based criteria. However, where uncertainties exist that by incorporating criterion-optimizing design in each module and organizing them in a behavior-based architecture

  9. GIS Fundamentals Lesson 10: Terrain Analysis Lesson 10: Terrain Analyses

    E-Print Network [OSTI]

    Butler, Christopher J.

    GIS Fundamentals Lesson 10: Terrain Analysis Lesson 10: Terrain Analyses What You'll Learn: Basic if needed. You should read chapter 11 in the GIS Fundamentals textbook before starting. Data are located processing, using the ArcGIS Hydrology tools. 1 #12;GIS Fundamentals Lesson 10: Terrain Analysis Project1

  10. Accessibility

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News Publications Traditional Knowledge KiosksAbout UsAboutWeb Policies » Accessibility

  11. Accessibility

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory of raregovAboutRecovery Act Recovery ActARMAccelerators,Access to the

  12. Terrainosaurus: realistic terrain synthesis using genetic algorithms 

    E-Print Network [OSTI]

    Saunders, Ryan L.

    2007-04-25

    a new, design-by-example method for synthesizing terrain height fields. In this approach, the user designs the layout of the terrain by sketching out simple regions using a CAD-style interface, and specifies the desired terrain characteristics...

  13. Representing Terrain With Mathematical Operators

    E-Print Network [OSTI]

    Franklin, W. Randolph

    of the terrain's generation by digging channels in the surface. Given our current reliance on digital map data a series of parameters (including size and area of influence of the drill, as well as the density formation mimics physical phenomena associated with geological terrain formation (such as erosion, digging

  14. All-terrain vehicle

    SciTech Connect (OSTI)

    Somerton-Rayner, M.

    1986-12-16

    This patent describes an all-terrain vehicle comprising: a chassis; four road wheel axles equally spaced along the chassis; suspension means mounting the axles on the chassis; wheels mounted adjacent both ends of each of the axles, the wheels on the foremost and the rearmost axles being steerably mounted; propulsion and driving means including a single internal combustion engine and gearbox, and first and second transfer boxes both coupled to be driven by the engine through the gearbox; the first transfer box driving the first and third axles and the second transfer box driving the second and fourth axles; means for driving in the alternative all four wheels and only the center two wheels; power-assisted steering gear means operatively connected to the steerably-mounted wheels of the foremost axle; and steering coupling means extending between the steerably-mounted wheels on the foremost and rearmost axles so dimensioned that upon steering of the front wheels, the rear wheels perform castoring constrained to a smaller turning angle and a lower rate of angular movement than the front wheels.

  15. Monitoring high-mountain terrain deformation from repeated air-and spaceborne optical data: examples using digital

    E-Print Network [OSTI]

    Kääb, Andreas

    Monitoring high-mountain terrain deformation from repeated air- and spaceborne optical data 2002 Abstract High mountains represent one of the most dynamic environments on earth. Monitoring of F 60 m RMS of the ASTER DEM was found for rough high-mountain topography, and F 18 m RMS

  16. Parallelized Distributed Embedded Control System for 2D Walking Robot for Studying Rough Terrain Locomotion

    E-Print Network [OSTI]

    Strunk, Gavin

    2010-12-10

    , parallelized, embedded control system was developed to provide the control structure for the Jaywalker. This system was chosen for its ability to execute simultaneous tasks efficiently. The two level control system provides a first level to implement a higher...

  17. Development of a Hybrid Powered 2D Biped Walking Machine Designed for Rough Terrain Locomotion

    E-Print Network [OSTI]

    Baker, Bryce C.

    2010-07-28

    Biped robots hold promise as terrestrial explorers because they require a single discrete foothold to place their next step. However, biped robots are multi-input multi-output dynamically unstable machines. This makes ...

  18. Analysis, design, and control of an omnidirectional mobile robot in rough terrain

    E-Print Network [OSTI]

    Udengaard, Martin Richard

    2008-01-01

    An omnidirectional mobile robot is able, kinematically, to move in any direction regardless of current pose. To date, nearly all designs and analyses of omnidirectional mobile robots have considered the case of motion on ...

  19. Web Accessibility Accessibility

    E-Print Network [OSTI]

    Oklahoma, University of

    Web Accessibility #12;Accessibility Webaim This is a pre-y prolific site that vary based on the type of web content. StaFc, content managed and dynamic web sites can benefit from our accessibility review service. Rich media

  20. Creating Standards for Winter Terrain Parks

    E-Print Network [OSTI]

    to engineering frame motivated creation of a 501c(3) non-profit, United States Terrain Park Council Dedicated fatalities (31 male, 6 female) mostly young J. Shealy (2000) Snowboard injury rate doubled during 1990-2000 from 3.37 to 6.97 per 1000 skier days Deaths: 50 (2007-2008) 39 (2008-2009) Compiled by California Ski

  1. Electrokinetic transport in microchannels with random roughness

    SciTech Connect (OSTI)

    Wang, Moran [Los Alamos National Laboratory; Kang, Qinjun [Los Alamos National Laboratory

    2008-01-01

    We present a numerical framework to model the electrokinetic transport in microchannels with random roughness. The three-dimensional microstructure of the rough channel is generated by a random generation-growth method with three statistical parameters to control the number density, the total volume fraction, and the anisotropy characteristics of roughness elements. The governing equations for the electrokinetic transport are solved by a high-efficiency lattice Poisson?Boltzmann method in complex geometries. The effects from the geometric characteristics of roughness on the electrokinetic transport in microchannels are therefore modeled and analyzed. For a given total roughness volume fraction, a higher number density leads to a lower fluctuation because of the random factors. The electroosmotic flow rate increases with the roughness number density nearly logarithmically for a given volume fraction of roughness but decreases with the volume fraction for a given roughness number density. When both the volume fraction and the number density of roughness are given, the electroosmotic flow rate is enhanced by the increase of the characteristic length along the external electric field direction but is reduced by that in the direction across the channel. For a given microstructure of the rough microchannel, the electroosmotic flow rate decreases with the Debye length. It is found that the shape resistance of roughness is responsible for the flow rate reduction in the rough channel compared to the smooth channel even for very thin double layers, and hence plays an important role in microchannel electroosmotic flows.

  2. Concentration of Eigenfunctions in Rough Media

    E-Print Network [OSTI]

    Smith, Hart F.

    Concentration of Eigenfunctions in Rough Media Hart F. Smith Department of Mathematics University of Washington, Seattle UC Irvine - June 18, 2012 Hart F. Smith Eigenfunctions in Rough Media #12;M = compact L2(M) (p) ( p 2 ) Hart F. Smith Eigenfunctions in Rough Media #12;M = compact manifold with volume

  3. SHORT COMMUNICATION Dynamical analysis of winter terrain park jumps

    E-Print Network [OSTI]

    of this work is to show how a dynamical analysis can assess impact injury risks and inform safer terrain park frequently pose a hazard to patrons and may represent a significant liability risk to winter resorts. By performing a simple dynamic analysis of terrain park jumps, the relative risk to impact injuries for any

  4. Benthic Terrain Modeler: Interpreting the Bathymetric Environment Shaun Walbridge1

    E-Print Network [OSTI]

    Wright, Dawn Jeannine

    that they can be used on any digital elevation data. The inclusion of easily customizable terrain classification, aspect, and rugosity from an input bathymetric data set. Additionally, terrain classification scripts allow users the freedom to create their own zone and structure classifications and define

  5. Vibration-based Terrain Classification Using Support Vector Machines

    E-Print Network [OSTI]

    Zell, Andreas

    Vibration-based Terrain Classification Using Support Vector Machines Christian Weiss, Holger Fr a method for terrain classification based on vibration induced in the vehicle's body. An accelerometer mounted on the vehicle measures the vibration perpendicular to the ground surface. We experimentally

  6. Representation of Terrain Data Using a Mathematical "Drill" Operator

    E-Print Network [OSTI]

    Franklin, W. Randolph

    Representation of Terrain Data Using a Mathematical "Drill" Operator Christopher S. Stuetzle1 and W and Franklin (RPI) Autocarto 2012 17 Sep 2012 6 / 24 #12;The Drill Operator v Then cut along an ever deeper Creates hydrography. 1 How can we fit a drill to a terrain location (pixel) p? 2 How can we represent

  7. Title: Digital Terrain Model of Southern Ontario Data Creator /

    E-Print Network [OSTI]

    Title: Digital Terrain Model of Southern Ontario Data Creator / Copyright Owner: First Base/A Coverage Date(s): 2002 Updates: N/A Abstract: The Digital Terrain Model (DTM) of southern Ontario / UTM (17) Resolution: N/A Coordinates: N/A Index Map: N/A Keywords (Place): Ontario Keywords (Subject

  8. Digital terrain modeling with the Chebyshev polynomials

    E-Print Network [OSTI]

    Florinsky, I V

    2015-01-01

    Mathematical problems of digital terrain analysis include interpolation of digital elevation models (DEMs), DEM generalization and denoising, and computation of morphometric variables by calculation of partial derivatives of elevation. Traditionally, these procedures are based on numerical treatments of two-variable discrete functions of elevation. We developed a spectral analytical method and algorithm based on high-order orthogonal expansions using the Chebyshev polynomials of the first kind with the subsequent Fejer summation. The method and algorithm are intended for DEM analytical treatment, such as, DEM global approximation, denoising, and generalization as well as computation of morphometric variables by analytical calculation of partial derivatives. To test the method and algorithm, we used a DEM of the Northern Andes including 230,880 points (the elevation matrix 480 $\\times$ 481). DEMs were reconstructed with 480, 240, 120, 60, and 30 expansion coefficients. The first and second partial derivatives ...

  9. Water Dynamics at Rough Interfaces

    E-Print Network [OSTI]

    Markus Rosenstihl; Kerstin Kämpf; Felix Klameth; Matthias Sattig; Michael Vogel

    2014-07-21

    We use molecular dynamics computer simulations and nuclear magnetic resonance experiments to investigate the dynamics of water at interfaces of molecular roughness and low mobility. We find that, when approaching such interfaces, the structural relaxation of water, i.e., the $\\alpha$ process, slows down even when specific attractive interactions are absent. This prominent effect is accompanied by a smooth transition from Vogel to Arrhenius temperature dependence and by a growing importance of jump events. Consistently, at protein surfaces, deviations from Arrhenius behavior are weak when free water does not exist. Furthermore, in nanoporous silica, a dynamic crossover of liquid water occurs when a fraction of solid water forms near 225 K and, hence, the liquid dynamics changes from bulk-like to interface-dominated. At sufficiently low temperatures, water exhibits a quasi-universal $\\beta$ process, which is characterized by an activation energy of $E_a\\!=\\!0.5$ eV and involves anisotropic reorientation about large angles. As a consequence of its large amplitude, the faster $\\beta$ process destroys essentially all orientational correlation, rendering observation of a possible slower $\\alpha$ process difficult in standard experiments. Nevertheless, we find indications for the existence of structural relaxation down to a glass transition of interfacial water near 185 K. Hydrated proteins show a highly restricted backbone motion with an amplitude, which decreases upon cooling and vanishes at comparable temperatures, providing evidence for a high relevance of water rearrangements in the hydration shell for secondary protein relaxations.

  10. Park Profiler/Jump Analyzer Practical method for determining terrain park jump performance

    E-Print Network [OSTI]

    . Terrain Park jump safety as a rider/resort partnership II. USTPC criteria: Quantifying best practices in terrain park jump design III. "Park Profiler" - practical tool to measure TP jump IV. "Jump Analyzer of flying ... but, as Icarus leaned the hard way, there are risks. #12;Terrain Park Jump Safety Terrain park

  11. Terrain sensing and estimation for dynamic outdoor mobile robots

    E-Print Network [OSTI]

    Ward, Christopher Charles

    2007-01-01

    In many applications, mobile robots are required to travel on outdoor terrain at high speed. Compared to traditional low-speed, laboratory-based robots, outdoor scenarios pose increased perception and mobility challenges ...

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

    E-Print Network [OSTI]

    Tucker, Donna F.; Crook, N. Andrew

    2005-09-01

    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...

  13. Development of the Robotic Touch foot Sensor for 2D walking Robot, for Studying Rough Terrain Locomotion

    E-Print Network [OSTI]

    Lee, Hunwoo

    2012-08-31

    SENSOR ………..14 2.1 Making coil flat and spiral…………………………………………….....14 2.2 Current generator..……………………………………………………….17 2.3 Passive low pass filter….……..…………………………………………19 2.4 Analog to Digital conversion with a sampling clock generator…………19 2....5 Power management and avoiding redundancy with multiplexers……….21 2.6 Microprocessor to read ADC …………………………………………...23 2.7 Test beds for developed sensors…………………………………………23 3. Trouble shoots……………………………………………………………………25 3.1 Interference among coils...

  14. Rough surface reconstruction for ultrasonic NDE simulation

    SciTech Connect (OSTI)

    Choi, Wonjae; Shi, Fan; Lowe, Michael J. S.; Skelton, Elizabeth A.; Craster, Richard V.

    2014-02-18

    The reflection of ultrasound from rough surfaces is an important topic for the NDE of safety-critical components, such as pressure-containing components in power stations. The specular reflection from a rough surface of a defect is normally lower than it would be from a flat surface, so it is typical to apply a safety factor in order that justification cases for inspection planning are conservative. The study of the statistics of the rough surfaces that might be expected in candidate defects according to materials and loading, and the reflections from them, can be useful to develop arguments for realistic safety factors. This paper presents a study of real rough crack surfaces that are representative of the potential defects in pressure-containing power plant. Two-dimensional (area) values of the height of the roughness have been measured and their statistics analysed. Then a means to reconstruct model cases with similar statistics, so as to enable the creation of multiple realistic realizations of the surfaces, has been investigated, using random field theory. Rough surfaces are reconstructed, based on a real surface, and results for these two-dimensional descriptions of the original surface have been compared with those from the conventional model based on a one-dimensional correlation coefficient function. In addition, ultrasonic reflections from them are simulated using a finite element method.

  15. A CONSTRUCTION OF THE ROUGH PATH ABOVE FRACTIONAL ...

    E-Print Network [OSTI]

    2013-03-05

    Appl. 120 (2010) 1444–1472], where the construction of a rough path over B was first introduced. 1. Introduction. Rough paths analysis is a theory introduced by ...

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

    E-Print Network [OSTI]

    Texas at San Antonio, University of

    Geostatistical Mapping of Mountain Precipitation Incorporating Autosearched Effects of Terrain 2004, in final form 30 March 2005) ABSTRACT Hydrologic and ecologic studies in mountainous terrain mountain precipitation using only precipi- tation gauge data. The ASOADeK model considers both

  17. Accessible buildings Moderately accessible buildings*

    E-Print Network [OSTI]

    Lee, Dongwon

    Campus neighborhood map Moderately accessible paths** Accessible building entrance via parking lot to the University Park campus. This map, provided by UAC, is designed to assist persons with disabilities in finding accessibility. Your observations and suggestions regarding architectural For more information on UAC, you can

  18. Parallel Implementation of a Vehicle-Tire-Terrain Interaction Model

    E-Print Network [OSTI]

    Negrut, Dan

    (VTTIM) · Three components o Vehicle o Tire o Terrain/Soil mechanics · Two interfaces o Vehicle support for ANCF `tire' 9 #12;Types of Soil Mechanics Models · Empirical Methods o WES numerics, Bekker of Tire Models · Rigid o Simple to implement in parallel o Only accurate if deformation of soil is much

  19. Towards a mathematics of terrain W. Randolph Franklin

    E-Print Network [OSTI]

    Franklin, W. Randolph

    explicitly, and · enforces global consistencies. Why? To put compression and other ops on a logical is derivative of elevation, but · that amplifies errors, and · lossy compression has errors, so · maybe we want the geology) to deep (simulating every molecule). · One solution: Scooping. Carve terrain from a block using

  20. The All Terrain Bio nano Gear for Space Radiation Detection System

    E-Print Network [OSTI]

    Mavroidis, Constantinos

    The All Terrain Bio nano Gear for Space Radiation Detection System Ajay Ummat, Constantinos in real-time while an astronaut is in the mission. All Terrain Bio-nano (ATB) gear system is one the current or any other future space suits. The proposed All Terrain Bio nano (ATB) gear is one such concept

  1. Combinatorial Block Copolymer Ordering on Tunable Rough

    SciTech Connect (OSTI)

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

    2012-05-01

    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.

  2. Correlating toughness and roughness in ductile fracture

    E-Print Network [OSTI]

    Ponson, Laurent; Osovski, Shmulik; Bouchaud, Elisabeth; Tvergaard, Viggo; Needleman, Alan

    2013-01-01

    Three dimensional calculations of ductile crack growth under mode I plane strain, small scale yielding conditions are carried out using an elastic-viscoplastic constitutive relation for a progres- sively cavitating plastic solid with two populations of void nucleating second phase particles. Full field solutions are obtained for three dimensional material microstructures characterized by ran- dom distributions of void nucleating particles. Crack growth resistance curves and fracture surface roughness statistics are calculated using standard procedures. The range of void nucleating particle volume fractions considered give rise to values of toughness, JIC, that vary by a factor of four. For all volume fractions considered, the computed fracture surfaces are self-affine over a size range of about two orders of magnitude with a roughness exponent of 0.54 $\\pm$ 0.03. For small void nucleating particle volume fractions, the mean large particle spacing serves as a single dominant length scale. In this regime, the c...

  3. Correlating toughness and roughness in ductile fracture

    E-Print Network [OSTI]

    Laurent Ponson; Ankit Srivastava; Shmulik Osovski; Elisabeth Bouchaud; Viggo Tvergaard; Alan Needleman

    2013-07-16

    Three dimensional calculations of ductile crack growth under mode I plane strain, small scale yielding conditions are carried out using an elastic-viscoplastic constitutive relation for a progres- sively cavitating plastic solid with two populations of void nucleating second phase particles. Full field solutions are obtained for three dimensional material microstructures characterized by ran- dom distributions of void nucleating particles. Crack growth resistance curves and fracture surface roughness statistics are calculated using standard procedures. The range of void nucleating particle volume fractions considered give rise to values of toughness, JIC, that vary by a factor of four. For all volume fractions considered, the computed fracture surfaces are self-affine over a size range of about two orders of magnitude with a roughness exponent of 0.54 $\\pm$ 0.03. For small void nucleating particle volume fractions, the mean large particle spacing serves as a single dominant length scale. In this regime, the correlation length of the fracture surface corresponding to the cut-off of the self-affine behavior is found to be linearly related to JIC thus quantitatively correlating toughness and fracture surface roughness.

  4. Distributed Roughness Receptivity in a Flat Plate Boundary Layer 

    E-Print Network [OSTI]

    Kuester, Matthew Scott

    2014-04-18

    the incoming boundary layer. This dissertation describes an experiment specifically designed to study the shielding effect. Three roughness configurations, a deterministic distributed roughness patch, a slanted rectangle, and the combination of the two, were...

  5. A fast direct numerical simulation method for characterising hydraulic roughness

    E-Print Network [OSTI]

    Chung, Daniel; MacDonald, Michael; Hutchins, Nicholas; Ooi, Andrew

    2015-01-01

    We describe a fast direct numerical simulation (DNS) method that promises to directly characterise the hydraulic roughness of any given rough surface, from the hydraulically smooth to the fully rough regime. The method circumvents the unfavourable computational cost associated with simulating high-Reynolds-number flows by employing minimal-span channels (Jimenez & Moin 1991). Proof-of-concept simulations demonstrate that flows in minimal-span channels are sufficient for capturing the downward velocity shift, that is, the Hama roughness function, predicted by flows in full-span channels. We consider two sets of simulations, first with modelled roughness imposed by body forces, and second with explicit roughness described by roughness-conforming grids. Owing to the minimal cost, we are able to conduct DNSs with increasing roughness Reynolds numbers while maintaining a fixed blockage ratio, as is typical in full-scale applications. The present method promises a practical, fast and accurate tool for character...

  6. Adhesive rough contacts near complete contact

    E-Print Network [OSTI]

    M. Ciavarella

    2015-05-01

    Recently, there has been some debate over the effect of adhesion on the contact of rough surfaces. Classical asperity theories predict, in agreement with experimental observations, that adhesion is always destroyed by roughness except if the amplitude of the same is extremely small, and the materials are particularly soft. This happens for all fractal dimensions. However, these theories are limited due to the geometrical simplification, which may be particularly strong in conditions near full contact. We introduce therefore a simple model for adhesion, which aims at being rigorous near full contact, where we postulate there are only small isolated gaps between the two bodies. The gaps can be considered as "pressurized cracks" by using Ken Johnson's idea of searching a corrective solution to the full contact solution. The solution is an extension of the adhesive-less solution proposed recently by Xu, Jackson, and Marghitu (XJM model) (2014). This process seems to confirm recent theories using the JKR theory, namely that the effect of adhesion depends critically on the fractal dimension. For D2.5, seems for large enough magnifications that a full fractal roughness completely destroys adhesion. These results are partly paradoxical since strong adhesion is not observed in nature except in special cases. A possible way out of the paradox may be that the conclusion is relevant for the near full contact regime, where the strong role of flaws at the interfaces, and of gaps full of contaminant, trapped air or liquid in pressure, needs to be further explored. If conditions near full contact are not achieved on loading, probably the conclusions of classical asperity theories may be confirmed.

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

    SciTech Connect (OSTI)

    Orgill, M.M.

    1981-02-01

    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.

  8. Hydrothermal coupling in a rough fracture

    E-Print Network [OSTI]

    Neuville, A; Schmittbuhl, J; Neuville, Am\\'{e}lie; Toussaint, Renaud; Schmittbuhl, Jean

    2006-01-01

    Heat exchange during laminar flow is studied at the fracture scale on the basis of the Stokes equation. We used a synthetic aperture model (a self-affine model) that has been shown to be a realistic geometrical description of the fracture morphology. We developed a numerical modelling using a finite difference scheme of the hydrodynamic flow and its coupling with an advection/conduction description of the fluid heat. As a first step, temperature within the surrounding rock is supposed to be constant. Influence of the fracture roughness on the heat flux through the wall, is estimated and a thermalization length is shown to emerge. Implications for the Soultz-sous-For\\^{e}ts geothermal project are discussed.

  9. Towards a transdisciplinary approach to rural electrification planning for universal access in India

    E-Print Network [OSTI]

    Borofsky, Yael

    2015-01-01

    Around 30% of India's roughly 1.2 billion people lack access to electricity, largely in rural areas. National and state rural electrification efforts are predominantly focused on grid extension, but interest in off-grid ...

  10. On-the-Fly Decompression and Rendering of Multiresolution Terrain

    SciTech Connect (OSTI)

    Lindstrom, P; Cohen, J D

    2009-04-02

    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.

  11. Wetting, Spreading, and Adsorption on Randomly Rough Surfaces

    E-Print Network [OSTI]

    S. Herminghaus

    2011-11-17

    The wetting properties of solid substrates with customary (i.e., macroscopic) random roughness are considered as a function of the microscopic contact angle of the wetting liquid and its partial pressure in the surrounding gas phase. Analytic expressions are derived which allow for any given lateral correlation function and height distribution of the roughness to calculate the wetting phase diagram, the adsorption isotherms, and to locate the percolation transition in the adsorbed liquid film. Most features turn out to depend only on a few key parameters of the roughness, which can be clearly identified. It is shown that a first order transition in the adsorbed film thickness, which we term 'Wenzel prewetting', occurs generically on typical roughness topographies, but is absent on purely Gaussian roughness. It is thereby shown that even subtle deviations from Gaussian roughness characteristics may be essential for correctly predicting even qualitative aspects of wetting.

  12. Enhanced Tissue Adhesion by Increased Porosity and Surface Roughness...

    Office of Scientific and Technical Information (OSTI)

    Enhanced Tissue Adhesion by Increased Porosity and Surface Roughness of Carbon Based Biomaterials Citation Details In-Document Search Title: Enhanced Tissue Adhesion by Increased...

  13. FOREST-AIR FLUXES OF CARBON, WATER AND ENERGY OVER NON-FLAT TERRAIN

    E-Print Network [OSTI]

    Lee, Xuhui

    FOREST-AIR FLUXES OF CARBON, WATER AND ENERGY OVER NON-FLAT TERRAIN XUHUI LEE and XINZHANG HU-air exchange of carbon, water, and energy was conducted at a mid-latitude, mixed forest on non-flat terrain to address this question, we conducted a field experiment on energy and carbon exchanges in a mixed forest

  14. Title: Digital Terrain Model of Southern Ontario: City of Toronto Data Creator /

    E-Print Network [OSTI]

    Title: Digital Terrain Model of Southern Ontario: City of Toronto Data Creator / Copyright Owner Ontario is a topographic model of the earth's surface. The data files outline features such as: bridge: N/A Keywords (Place): Toronto, Ontario Keywords (Subject): Contours, Digital Terrain Models

  15. Stability of Passive Dynamic Walking on Uneven Terrain Katie Byl and Russ Tedrake

    E-Print Network [OSTI]

    Tedrake, Russ

    and MFPTs on uneven terrain. mh/m a (m) MFPT: std .5° MFPT: std 1.0° walker #1 2.0 .6 20 6 walker #2 0.3 .7 Institute of Technology email: katiebyl@mit.edu, russt@mit.edu, web: http terrain. Although deterministic definitions of stability do not apply, for sufficiently low levels

  16. A Realistic Framework for Delay-Tolerant Network Routing in Open Terrains with

    E-Print Network [OSTI]

    A Realistic Framework for Delay-Tolerant Network Routing in Open Terrains with Continuous Churn to classify routing protocols based on the difference in their behavior under churn. Keywords: Delay model churn in the network, by having these nodes enter the terrain as a Poisson process and exit

  17. Optimal Complete Terrain Coverage using an Unmanned Aerial Vehicle Anqi Xu, Chatavut Viriyasuthee, and Ioannis Rekleitis

    E-Print Network [OSTI]

    Dudek, Gregory

    Optimal Complete Terrain Coverage using an Unmanned Aerial Vehicle Anqi Xu, Chatavut Viriyasuthee an aerial vehicle. Ex- tensive experimental results in simulation validate the presented system, along. INTRODUCTION This paper presents a realization of an optimal terrain coverage algorithm for an Unmanned Aerial

  18. CHARACTERIZATION OF SURFACE ROUGHNESS AND INITIAL CONDITIONS FOR CYLINDRICAL HYDRODYNAMIC

    E-Print Network [OSTI]

    Barnes, Cris W.

    CHARACTERIZATION OF SURFACE ROUGHNESS AND INITIAL CONDITIONS FOR CYLINDRICAL HYDRODYNAMIC AND MIX across a variable density interface, that interface must be well characterized. There exist a number, characterizing, and affecting the surface roughness was driven by Ablative Rayleigh-Taylor work5

  19. Counterintuitive MCNPX Results for Scintillator Surface Roughness Effect

    SciTech Connect (OSTI)

    2012-08-12

    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.

  20. Accessing PDSF

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News Publications Traditional Knowledge KiosksAbout UsAboutWeb Policies »FacilitiesAccessing

  1. Accessibility | NREL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory of raregovAboutRecovery Act Recovery ActARMAccelerators,Access toServices

  2. Gate Access

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid you not find whatGasEnergyfeatureCleanperformanceCareersGate Access Gate

  3. Remote Access

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-RichProtonAbout UsRegionalScientific andRemote Access Remote

  4. Gravitational quantum states of neutrons in a rough waveguide

    E-Print Network [OSTI]

    A. E. Meyerovich; V. V. Nesvizhevsky

    2006-03-22

    A theory of gravitational quantum states of ultracold neutrons in waveguides with absorbing/scattering walls is presented. The theory covers recent experiments in which the ultracold neutrons were beamed between a mirror and a rough scatterer/absorber. The analysis is based on a recently developed theory of quantum transport along random rough walls which is modified in order to include leaky (absorbing) interfaces and, more importantly, the low-amplitude high-aperture roughness. The calculations are focused on a regime when the direct transitions into the continuous spectrum above the absorption threshold dominate the depletion of neutrons from the gravitational states and are more efficient than the processes involving the intermediate states. The theoretical results for the neutron count are sensitive to the correlation radius (lateral size) of surface inhomogeneities and to the ratio of the particle energy to the absorption threshold in a weak roughness limit. The main impediment for observation of the higher gravitational states is the "overhang" of the particle wave functions which can be overcome only by use scatterers with strong roughness. In general, the strong roughness with high amplitude is preferable if one wants just to detect the individual gravitational states, while the strong roughness experiments with small amplitude and high aperture are preferable for the quantitative analysis of the data. We also discuss the ways to further improve the accuracy of calculations and to optimize the experimental regime.

  5. Wetting on Random Roughness: the Ubiquity of Wenzel Prewetting

    E-Print Network [OSTI]

    Stephan Herminghaus

    2012-03-23

    The wetting properties of solid substrates with macroscopic random roughness are considered as a function of the microscopic contact angle of the wetting liquid and its partial pressure in the surrounding gas phase. It is shown that Wenzel prewetting, which has been recently predicted for a rather wide class of roughness pro?les derived from Gaussian random processes by a general distortion procedure, should in fact be ubiquitous and prevail under even much milder conditions. The well-known transition occurring at Wenzel's angle is accompanied by a prewetting transition, at which a jump in the adsorbed liquid volume occurs. This should be present on most surfaces bearing homogeneous, isotropic random roughness.

  6. Learning to visually predict terrain properties for planetary rovers

    E-Print Network [OSTI]

    Brooks, Christopher Allen, 1978-

    2009-01-01

    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 ...

  7. Influence of surface roughness and waviness upon thermal contact resistance

    E-Print Network [OSTI]

    Yovanovich, M. Michael

    1967-01-01

    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 ...

  8. Effect of Surface Roughness on Wind Turbine Performance 

    E-Print Network [OSTI]

    Ehrmann, Robert Schaefer

    2014-06-25

    Wind farm operators observe production deficits as machines age. Quantifying deterioration on individual components is difficult, but one potential explanation is accumulation of blade surface roughness. Historically, wind turbine airfoils were...

  9. PROPAGATION OF SINGULARITIES FOR ROUGH METRICS HART F. SMITH

    E-Print Network [OSTI]

    Smith, Hart F.

    PROPAGATION OF SINGULARITIES FOR ROUGH METRICS HART F. SMITH Abstract. We use a wave packet the Simons Foundation (# 266371 to Hart Smith). 1 #12;2 HART F. SMITH H¨ormander's theorem [9] on propagation

  10. Hypersonic Measurements of Roughness-Induced Transient Growth 

    E-Print Network [OSTI]

    Sharp, Nicole Susanne

    2014-04-17

    The effects of surface roughness on boundary-layer disturbance growth and laminar-to-turbulent transition are not well understood, especially in hypersonic boundary layers. The transient growth mechanism that produces algebraic growth of stream wise...

  11. Sept 2001 Rough Draft OFFM Policy Letter 02-1.doc | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Sept 2001 Rough Draft OFFM Policy Letter 02-1.doc Sept 2001 Rough Draft OFFM Policy Letter 02-1.doc Sept 2001 Rough Draft OFFM Policy Letter 02-1.doc More Documents & Publications...

  12. Modelling of wind turbine wakes in complex terrain using computational fluid dynamics 

    E-Print Network [OSTI]

    Makridis, Alexandros

    2012-06-25

    This thesis focuses on modelling of wind turbine wakes when they are affected by real complex terrain features, such as hills and forests, and also examines the effect of the rotational momentum imparted to the downstream ...

  13. Mapping textures on 3d terrains: a hybrid cellular automata approach 

    E-Print Network [OSTI]

    Sinvhal, Swapnil

    2007-04-25

    It is a time consuming task to generate textures for large 3D terrain surfaces in computer games, flight simulations and computer animations. This work explores the use of cellular automata in the automatic generation of ...

  14. Guidance and control using model predictive control for low altitude real-time terrain following flight

    E-Print Network [OSTI]

    Lapp, Tiffany Rae, 1979-

    2004-01-01

    This thesis presents the design and implementation of a model predictive control based trajectory optimization method for Nap-of-the-Earth (NOE) flight. A NOE trajectory reference is generated over a subspace of the terrain. ...

  15. The design of a frame for an all terrain, lever propelled wheelchair

    E-Print Network [OSTI]

    Walton, John Michael

    2011-01-01

    This thesis outlines the process of designing a frame for the Leveraged Freedom Chair (LFC) Prime, an all-terrain levered powered wheelchair designed to improve the mobility of disabled individuals. This design allows for ...

  16. L2-Gain Optimization for Robust Bipedal Walking on Unknown Terrain Hongkai Dai and Russ Tedrake

    E-Print Network [OSTI]

    Tedrake, Russ

    control analysis and design methodologies without additional machinery. We attempt to provide that machinery here. In particular, we quantify the robustness of the system to terrain perturbations by defining

  17. Ph.D. Showcase: Measuring Terrain Distances Through Extracted Channel Networks

    E-Print Network [OSTI]

    Franklin, W. Randolph

    of elevation data. This is a crucial step in better- ing the design and construction of levees and dams. (Fully An important characteristic of a terrain is the drainage, or channel, network, because hydraulic erosion

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

    SciTech Connect (OSTI)

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

    1993-06-01

    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.

  19. Internet architecture Access networks

    E-Print Network [OSTI]

    architecture (1) router PC server wireless laptop smartphone Wired Communication links in router)/wireless access point Ethernet Wireless access point Wireless laptops Router links " connect end systems/routers/switches/access points " fiber, copper and radio " transmission rate

  20. Application of Rough Set Theory to Analysis of Hydrocyclone Operation

    E-Print Network [OSTI]

    Owladeghaffari, H; Irannajad, M

    2008-01-01

    This paper describes application of rough set theory, on the analysis of hydrocyclone operation. In this manner, using Self Organizing Map (SOM) as preprocessing step, best crisp granules of data are obtained. Then, using a combining of SOM and rough set theory (RST)-called SORST-, the dominant rules on the information table, obtained from laboratory tests, are extracted. Based on these rules, an approximate estimation on decision attribute is fulfilled. Finally, a brief comparison of this method with the SOM-NFIS system (briefly SONFIS) is highlighted.

  1. E ective boundary conditions for laminar ows over periodic rough boundaries

    E-Print Network [OSTI]

    Achdou, Yves

    E#27;ective boundary conditions for laminar #29;ows over periodic rough boundaries Yves Achdou #3 are proposed for a laminar #29;ow over a rough wall with periodic roughness elements. These e#27;ective is such an approach ? In this paper, we wish to answer these questions for laminar #29;ows over periodic rough walls

  2. ORIGINAL PAPER Transient Heat Conduction Between Rough Sliding Surfaces

    E-Print Network [OSTI]

    Awtar, Shorya

    , and the results are combined with the height distributions to determine the mean heat flux and the mean normal increases with the square root of the sliding speed and decreases with the 3/4 power of the combined RMSORIGINAL PAPER Transient Heat Conduction Between Rough Sliding Surfaces Yuwei Liu · J. R. Barber

  3. Analysis of the Scattering by an Unbounded Rough Surface

    E-Print Network [OSTI]

    2011-11-12

    eling acoustic and electromagnetic wave propagation over outdoor ground and sea surfaces, optical scattering from the ... been intensively examined by researchers in the engineering community. ..... explicit characterization of the norm in H1(?) via Fourier coefficient: ...... rough surfaces, Wave Motion, 24 (1996)

  4. LARGE EDDY SIMULATION OF TURBULENT BOUNDARY LAYERS OVER ROUGH BEDS

    E-Print Network [OSTI]

    Pawlak, Geno

    that determines the response of the boundary layer is not clear. One method to characterize the irregular nature with different spectral slopes using 2D 10 % loading square waves as basis functions. These square waves can) is then used to simulate the turbulent boundary layer over the rough beds. The LES solver is first validated

  5. Open Access Task Force Open Access to

    E-Print Network [OSTI]

    Jiang, Huiqiang

    Libraries Initiative launched by National Science Foundation; Social Sciences Research Network (SSRN Library System rgmiller@pitt.edu #12;Open Access Task Force Open Access is... · A family of copyright · The only constraint on reproduction and distribution, and the only role for copyright in this domain

  6. Immersed Boundary Methods for High-Resolution Simulation of Atmospheric Boundary-Layer Flow Over Complex Terrain

    E-Print Network [OSTI]

    Chow, Fotini Katopodes

    models, such as the Weather Research and Forecasting (WRF) model, are in- creasingly used for high facilitates explicit resolution of complex terrain, even urban terrain, in the WRF mesoscale model. First gradient boundary conditions. Specified diurnal heating in a valley, producing anabatic winds, is used

  7. Combinatorial Block Copolymer Ordering on Tunable Rough Substrates

    SciTech Connect (OSTI)

    Kulkarni, Manish M.; Yager, Kevin G.; Sharma, Ashutosh; Karim, Alamgir (IIT-India); (Akron); (BNL)

    2012-10-25

    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} {approx} 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.

  8. Heat transfer between elastic solids with randomly rough surfaces

    E-Print Network [OSTI]

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

    2009-08-27

    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.

  9. Accessing Online COR Training

    Office of Energy Efficiency and Renewable Energy (EERE)

    Contracting Officer’s Representative (COR) training is now be available in an online format. "Accessing Online COR Training" provides a step-by-step guide to access the online COR course. 

  10. Capillary adhesion between elastic solids with randomly rough surfaces

    E-Print Network [OSTI]

    B. N. J. Persson

    2008-05-06

    I study how the contact area and the work of adhesion, between two elastic solids with randomly rough surfaces, depend on the relative humidity. The surfaces are assumed to be hydrophilic, and capillary bridges form at the interface between the solids. For elastically hard solids with relative smooth surfaces, the area of real contact and therefore also the sliding friction, are maximal when there is just enough liquid to fill out the interfacial space between the solids, which typically occurs for $d_{\\rm K} \\approx 3 h_{\\rm rms}$, where $d_{\\rm K}$ is the height of the capillary bridge and $h_{\\rm rms}$ the root-mean-square roughness of the (combined) surface roughness profile. For elastically soft solids, the area of real contact is maximal for very low humidity (i.e., small $d_{\\rm K}$), where the capillary bridges are able to pull the solids into nearly complete contact. In both case, the work of adhesion is maximal (and equal to $2\\gamma {\\rm cos}\\theta$, where $\\gamma$ is the liquid surface tension and $\\theta$ the liquid-solid contact angle) when $d_{\\rm K} >> h_{\\rm rms}$, corresponding to high relative humidity.

  11. The Inverting Effect of Curvature in Winter Terrain Park Jump Takeoffs J. A. McNeil

    E-Print Network [OSTI]

    a significantly greater head/neck injury risk to resort patrons than normal skiing activities [1­4]. One intentionally, curvature in the takeoff can lead to involuntary inversion. In this work we lay out the basic a potential injury risk. A mitigating takeoff design criterion adopted by the US Terrain Park Council based

  12. Modelling the "Pop" in Winter Terrain Park Jumps J. A. McNeil

    E-Print Network [OSTI]

    at ski resorts have found that jumping generally poses a signif- icantly greater risk of spine and head found that jumping generally (whether in a terrain park or not) poses a significantly greater risk of the feature." The authors have since identified experimental errors in this work and an erratum has been

  13. SVMs for Vibration-based Terrain Classification Christian Weiss, Matthias Stark, and Andreas Zell

    E-Print Network [OSTI]

    Zell, Andreas

    SVMs for Vibration-based Terrain Classification Christian Weiss, Matthias Stark, and Andreas Zell mobile robot traverses different types of ground surfaces, different types of vibrations are induced in the body of the robot. These vibrations can be used to learn a discrimination between different surfaces

  14. Using Immersive 3D Terrain Models For Fusion Of UAV Surveillance Imagery

    E-Print Network [OSTI]

    Scerri, Paul

    Using Immersive 3D Terrain Models For Fusion Of UAV Surveillance Imagery Sean Owens , Katia Sycara and Paul Scerri Carnegie Mellon University, Pittsburgh, PA, 15213, USA Teams of small and micro UAVs a single operator to utilize data from several UAVs and interact with the data in a more natural and less

  15. Horizontal structures in granulite terrains: A record of mountain building or mountain collapse?

    E-Print Network [OSTI]

    Sandiford, Mike

    Horizontal structures in granulite terrains: A record of mountain building or mountain collapse horizontal structures occurred during the metamorphic culmination and was followed by isobaric cooling that no significant erosional denudation fol- lowed the development of the horizontal structures and thus precludes

  16. Approximating the Visible Region of a Point on a Terrain Boaz Ben-Moshe

    E-Print Network [OSTI]

    Ben-Moshe, Boaz

    enough; that is, whenever the difference between the sets of visible segments along the cross sections computes the (projections of the) visible por- tions of the cross section of T in this direc§ Abstract Given a terrain T and a point p on or above it, we wish to compute the region Rp that is visible

  17. Saving the soil: AgriLife units work to improve training terrain 

    E-Print Network [OSTI]

    Orth, Melanie

    2011-01-01

    Saving the soil AgriLife units work to improve training terrain Story by Melanie Orth txH2O | pg. 9 Heavy tanks and armored vehicles that have continually rolled over the 67,000-acre West Range at Fort Hood for the past 60 years have...

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

    E-Print Network [OSTI]

    Hu, Hui

    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

  19. CO2 transport over complex terrain Jielun Sun a,*, Sean P. Burns a

    E-Print Network [OSTI]

    Stephens, Britton B.

    CO2 transport over complex terrain Jielun Sun a,*, Sean P. Burns a , Anthony C. Delany a , Steven P; accepted 15 February 2007 Abstract CO2 transport processes relevant for estimating net ecosystem exchange investigated during a pilot experiment. We found that cold, moist, and CO2- rich air was transported downslope

  20. Large Eddy Simulation of Stable Boundary Layer Turbulent Processes in Complex Terrain

    SciTech Connect (OSTI)

    Eric D. Skyllingstad

    2005-01-26

    Research was performed using a turbulence boundary layer model to study the behavior of cold, dense flows in regions of complex terrain. Results show that flows develop a balance between turbulent entrainment of warm ambient air and dense, cold air created by surface cooling. Flow depth and strength is a function of downslope distance, slope angle and angle changes, and the ambient air temperature.

  1. Autonomous Vision-based Landing and Terrain Mapping Using an MPC-controlled Unmanned Rotorcraft

    E-Print Network [OSTI]

    Sastry, S. Shankar

    determines the best trajectory to cover large areas of terrain or to perform closer inspection of potential by tracking the refer- ence trajectory as computed by a real-time MPC-based op- timization. This trajectory. of Aerospace Engineering, Ko- rea Advanced Institute of Science and Technology, Daejeon, South Korea: hcshim

  2. Effects of hydraulic roughness on surface textures of gravel-bed rivers

    E-Print Network [OSTI]

    Montgomery, David R.

    Effects of hydraulic roughness on surface textures of gravel-bed rivers John M. Buffington1 that bed-surface grain size is responsive to hydraulic roughness caused by bank irregularities, bars condition of low hydraulic roughness. For a given 0bf , channels with progressively greater hydraulic

  3. Independent External Peer Review Report Rough River Dam 18 August 2011 ii

    E-Print Network [OSTI]

    US Army Corps of Engineers

    #12;Independent External Peer Review Report ­ Rough River Dam 18 August 2011 ii This page intentionally blank. #12;Independent External Peer Review Report ­ Rough River Dam 18 August 2011 iii Table Panel Members B-1 Appendix C ­ Charge for IEPR Panel C-1 List of Figures Figure 1. Rough River Dam 4

  4. Scaling laws governing the roughness of the swash edge line

    E-Print Network [OSTI]

    Ed. Bormashenko; A. Musin; R. Grynuov

    2014-02-23

    The physics of swash i.e. a layer of water that washes up on the beach after an incoming wave has broken is complicated and intriguing. It includes perplexed hydrodynamic and sediment transport events. In our paper we address to the roughness of the moving swash boundary at which a beach, water and air meet. We treat the behavior of this boundary as an interfacial phenomenon, without going into details of formation of edge waves and beach cusps, covered broadly in literature. This "crude" approach turns out to be productive and revealing the resemblance of the swash line with a broad diversity of effects arising from the random pinning of moving boundaries.

  5. Scaling laws governing the roughness of the swash edge line

    E-Print Network [OSTI]

    Bormashenko, Ed; Grynuov, R

    2014-01-01

    The physics of swash i.e. a layer of water that washes up on the beach after an incoming wave has broken is complicated and intriguing. It includes perplexed hydrodynamic and sediment transport events. In our paper we address to the roughness of the moving swash boundary at which a beach, water and air meet. We treat the behavior of this boundary as an interfacial phenomenon, without going into details of formation of edge waves and beach cusps, covered broadly in literature. This "crude" approach turns out to be productive and revealing the resemblance of the swash line with a broad diversity of effects arising from the random pinning of moving boundaries.

  6. File:Wind rough example.pdf | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePowerEdistoWhiskey flats 100k.pdf Jump to: navigation, searchWind rough

  7. Semiclassical Theory of Integrable and Rough Andreev Billiards

    E-Print Network [OSTI]

    W. Ihra; M. Leadbeater; J. L. Vega; K. Richter

    1999-09-08

    We study the effect on the density of states in mesoscopic ballistic billiards to which a superconducting lead is attached. The expression for the density of states is derived in the semiclassical S-matrix formalism shedding insight into the origin of the differences between the semiclassical theory and the corresponding result derived from random matrix models. Applications to a square billiard geometry and billiards with boundary roughness are discussed. The saturation of the quasiparticle excitation spectrum is related to the classical dynamics of the billiard. The influence of weak magnetic fields on the proximity effect in rough Andreev billiards is discussed and an analytical formula is derived. The semiclassical theory provides an interpretation for the suppression of the proximity effect in the presence of magnetic fields as a coherence effect of time reversed trajectories, similar to the weak localisation correction of the magneto-resistance in chaotic mesoscopic systems. The semiclassical theory is shown to be in good agreement with quantum mechanical calculations.

  8. Evaluation of Single-Doppler Radar Wind Retrievals in Flat and Complex Terrain

    SciTech Connect (OSTI)

    Newsom, Rob K.; Berg, Larry K.; Pekour, Mikhail S.; Fast, Jerome D.; Xu, Qin; Zhang, Pengfei; Yang, Qing; Shaw, William J.; Flaherty, Julia E.

    2014-08-01

    The accuracy of winds derived from NEXRAD level II data is assessed by comparison with independent observations from 915 MHz radar wind profilers. The evaluation is carried out at two locations with very different terrain characteristics. One site is located in an area of complex terrain within the State Line Wind Energy Center in northeast Oregon. The other site is located in an area of flat terrain on the east-central Florida coast. The National Severe Storm Laboratory’s 2DVar algorithm is used to retrieve wind fields from the KPDT (Pendleton OR) and KMLB (Melbourne FL) NEXRAD radars. Comparisons between the 2DVar retrievals and the radar profilers were conducted over a period of about 6 months and at multiple height levels at each of the profiler sites. Wind speed correlations at most observation height levels fell in the range from 0.7 to 0.8, indicating that the retrieved winds followed temporal fluctuations in the profiler-observed winds reasonably well. The retrieved winds, however, consistently exhibited slow biases in the range of1 to 2 ms-1. Wind speed difference distributions were broad with standard deviations in the range from 3 to 4 ms-1. Results from the Florida site showed little change in the wind speed correlations and difference standard deviations with altitude between about 300 and 1400 m AGL. Over this same height range, results from the Oregon site showed a monotonic increase in the wind speed correlation and a monotonic decrease in the wind speed difference standard deviation with increasing altitude. The poorest overall agreement occurred at the lowest observable level (~300 m AGL) at the Oregon site, where the effects of the complex terrain were greatest.

  9. Local contact stress measurements at a rough interface

    E-Print Network [OSTI]

    J. Scheibert; A. Prevost; J. Frelat; P. Rey; G. Debrégeas

    2007-11-07

    An original MEMS-based force sensing device is designed which allows to measure spatially resolved normal and tangential stress fields at the base of an elastomeric film. This device is used for the study of the contact stress between a rough film and a smooth glass sphere under normal load. The measured profiles are compared to Finite Elements Method calculations for a smooth contact with boundary conditions obeying Amontons-Coulomb's friction law. The accuracy of the measurements allows to discriminate between dry and lubricated contact conditions and to evidence load-dependent deviations from Amontons-Coulomb's profiles. These deviations are qualitatively interpreted by taking into account the finite compliance of the micro-contact population.

  10. A rough analytic relation on partial differential equations

    E-Print Network [OSTI]

    Kato, Tsuyoshi

    2010-01-01

    We introduce some analytic relations on the set of partial differential equations of two variables. It relies on a new comparison method to give rough asymptotic estimates for solutions which obey different partial differential equations. It uses a kind of scale transform called tropical geometry which connects automata with real rational dynamics. Two different solutions can be considered when their defining equations are transformed to the same automata at infinity. We have a systematic way to construct related pairs of different partial differential equations, and also construct some unrelated pairs concretely. These verify that the new relations are non trivial. We also make numerical calculations and compare the results for both related and unrelated pairs of PDEs.

  11. Thermodynamics of sustaining gases in the roughness of submerged superhydrophobic surfaces

    E-Print Network [OSTI]

    Neelesh A. Patankar

    2015-05-22

    Rough surfaces submerged in a liquid can remain almost dry if the liquid does not fully wet the roughness and gases are sustained in roughness grooves. Such partially dry surfaces can help reduce drag or enhance boiling. Gases sustained in roughness grooves would be composed of air and the vapor phase of the liquid itself. The thermodynamics of sustaining vapor was considered in a prior work [Patankar, Soft Matter, 2010, 6:1613]. Here, the thermodynamics of sustaining gases (e.g. air) is considered. Governing equations are presented along with a solution methodology to determine a critical condition to sustain gases. The critical roughness scale to sustain gases is estimated for different degrees of saturation of gases dissolved in the liquid. It is shown that roughness spacings of less than a micron are essential to sustain gases on surfaces submerged in water at atmospheric pressure. This is consistent with prior empirical data.

  12. Identity and Access Management: Access Management Survey 1 Access Management Survey Questions

    E-Print Network [OSTI]

    Maroncelli, Mark

    Identity and Access Management: Access Management Survey 1 Access Management Survey Questions The Identity and Access Management (IAM) Technical Architect Group (TAG) was formed by Kevin Morooney, the vice assistance with defining the requirements for Access Management, as outlined in Strategic Recommendations 4

  13. ACCESS Magazine Fall 2006

    E-Print Network [OSTI]

    2006-01-01

    of cars whose owners have prepaid to enter the CCZ; privateowners who have not prepaid and do not pay by midnight areA LMANAC : Unlimited Access: Prepaid Transit at Universities

  14. Accessibility HANDBOOK AND

    E-Print Network [OSTI]

    Accessibility Awareness HANDBOOK AND LEARNING MODULE A Guide for Faculty and Staff #12;Table Awareness Handbook and Learning Module 1 Sometimes the worst thing about having a disability is that people

  15. Accessing the spoken word 

    E-Print Network [OSTI]

    Goldman, Jerry; Renals, Steve; Bird, Steven; de Jong, Franciska; Federico, Marcello; Fleischhauer, Carl; Kornbluh, Mark; Lamel, Lori; Oard, Douglas W; Stewart, Claire; Wright, Richard

    Spoken-word audio collections cover many domains, including radio and television broadcasts, oral narratives, governmental proceedings, lectures, and telephone conversations. The collection, access, and preservation of such data is stimulated...

  16. Surface Roughness of Stainless Steel Bender Mirrors for Focusing Soft X-rays

    E-Print Network [OSTI]

    2005-01-01

    Surface Roughness of Stainless Steel Bender Mirrors forWe have used polished stainless steel as a mirror substratefor smooth polishing. Stainless steel is stronger and can be

  17. Flow rule of dense granular flows down a rough incline

    E-Print Network [OSTI]

    Tamas Borzsonyi; Robert E. Ecke

    2007-07-09

    We present experimental findings on the flow rule for granular flows on a rough inclined plane using various materials including sand and glass beads of various sizes and four types of copper particles with different shapes. We characterize the materials by measuring $h_s$ (the thickness at which the flow subsides) as a function of the plane inclination $\\theta$ on various surfaces. Measuring the surface velocity $u$ of the flow as a function of flow thickness $h$, we find that for sand and glass beads the Pouliquen flow rule $u/\\sqrt{gh} \\sim \\beta h/h_s$ provides reasonable but not perfect collapse of the $u(h)$ curves measured for various $\\theta$ and mean particle diameter $d$. Improved collapse is obtained for sand and glass beads by using a recently proposed scaling of the form $u/\\sqrt{gh} =\\beta \\cdot h \\tan^2\\theta /h_s\\ \\tan^2\\theta_1$ where $\\theta_1$ is the angle at which the $h_s(\\theta)$ curves diverge. Measuring the slope $\\beta$ for ten different sizes of sand and glass beads, we find a systematic, strong increase of $\\beta$ with the divergence angle $\\theta_1$ of $h_s$. The copper materials with different shapes are not well described by either flow rule with $u \\sim h^{3/2}$.

  18. Lyapunov instability of rough hard-disk fluids

    E-Print Network [OSTI]

    Jacobus A. van Meel; Harald A. Posch

    2009-04-02

    The dynamical instability of rough hard-disk fluids in two dimensions is characterized through the Lyapunov spectrum and the Kolmogorov-Sinai entropy, $h_{KS}$, for a wide range of densities and moments of inertia $I$. For small $I$ the spectrum separates into translation-dominated and rotation-dominated parts. With increasing $I$ the rotation-dominated part is gradually filled in at the expense of translation, until such a separation becomes meaningless. At any density, the rate of phase-space mixing, given by $h_{KS}$, becomes less and less effective the more the rotation affects the dynamics. However, the degree of dynamical chaos, measured by the maximum Lyapunov exponent, is only enhanced by the rotational degrees of freedom for high-density gases, but is diminished for lower densities. Surprisingly, no traces of Lyapunov modes were found in the spectrum for larger moments of inertia. The spatial localization of the perturbation vector associated with the maximum exponent however persists for any $I$.

  19. Surface roughness and geological mapping at sub-hectometer scale from the High

    E-Print Network [OSTI]

    Cord, Aurélien

    and characterized in terms of roughness. Key words: Geological Processes, Impact Processes, Image Processing, Mars valuable insights into the characterization of and discrimination between these geological processesSurface roughness and geological mapping at sub-hectometer scale from the High Resolution Stereo

  20. Evolution of swelling pressure of cohesive-frictional, rough and elasto-plastic granulates

    E-Print Network [OSTI]

    Luding, Stefan

    with cohesive-frictional, rough and elasto-plastic "mi- croscopic" contact properties. The spherical particlesEvolution of swelling pressure of cohesive- frictional, rough and elasto-plastic granulates Stefan as function of pressure for different micro- scopic contact properties. Keywords: granular materials, discrete

  1. Computation of the drag force on a rough sphere close to a wall

    E-Print Network [OSTI]

    Gérard-Varet, David

    2011-01-01

    We consider the effect of surface roughness on solid-solid contact in a Stokes flow. Various models for the roughness are considered, and a unified methodology is given to derive the corresponding asymptotics of the drag force. In this way, we recover and clarify the various expressions that can be found in the litterature.

  2. American Institute of Aeronautics and Astronautics Effects of Surface Roughness on Laminar Separation Bubble over a

    E-Print Network [OSTI]

    Wang, Zhi Jian "ZJ"

    1 American Institute of Aeronautics and Astronautics Effects of Surface Roughness on Laminar Engineering and CFD Center, Iowa State University, Ames, IA 50011 Laminar separation bubbles (LSBs) are often of surface roughness on laminar separation and turbulent transition can provide insights into the design

  3. A FETCH DEPENDENT MODEL OF SEA SURFACE ROUGHNESS FOR OFFSHORE WIND POWER UTILISATION

    E-Print Network [OSTI]

    Heinemann, Detlev

    A FETCH DEPENDENT MODEL OF SEA SURFACE ROUGHNESS FOR OFFSHORE WIND POWER UTILISATION Bernhard Lange, Resources, Roughness, Coastal Sea Areas, Waves, Rødsand 1 INTRODUCTION Large offshore wind farms are being wind conditions of offshore sites, since the higher energy yield has to compensate the additional

  4. Roughness Tolerance Studies for the Undulator Beam Pipe Chamber of LCLS-II

    E-Print Network [OSTI]

    Bane, K

    2014-01-01

    We investigate the effect of wall roughness on the wakefield-induced energy variation in the undulator beam pipe of LCLS-II. We find that a wall roughness equivalent to an rms surface slope of 30 mr increases the total induced energy variation within the bunch (due to the resistive wall wake) by a modest 20%.

  5. Internal wave generation from rough topography D. A. Aguilar and B. R. Sutherlanda

    E-Print Network [OSTI]

    Sutherland, Bruce

    Internal wave generation from rough topography D. A. Aguilar and B. R. Sutherlanda Department examine internal wave generation above and in the lee of finite-amplitude periodic topography having various degrees of roughness. We show that internal waves are generated not only by flow over the hills

  6. High-order solutions of three-dimensional rough-surface scattering problems at high frequencies.

    E-Print Network [OSTI]

    Turc, Catalin

    High-order solutions of three-dimensional rough-surface scattering problems at high frequencies. I-order numerical method for the solution of high- frequency scattering problems from rough surfaces in three dimensions. The method is based on the asymptotic solution of appropriate integral equations in the high-frequency

  7. Lyapunov instability of rough hard-disk fluids Jacobus A. van Meel*

    E-Print Network [OSTI]

    Posch, Harald A.

    Lyapunov instability of rough hard-disk fluids Jacobus A. van Meel* FOM Institute for Atomic The dynamical instability of rough hard-disk fluids in two dimensions is characterized through the Lyapunov, measured by the maximum Lyapunov exponent, is only enhanced by the rotational degrees of freedom for high

  8. Rough Algebras and Automated Deduction Anita Wasilewska 1 and Laurent Vigneron 2

    E-Print Network [OSTI]

    Rusinowitch, Michaël

    of Boole himself led to the notion which we now call Boolean algebra, but one of the turning pointsRough Algebras and Automated Deduction Anita Wasilewska 1 and Laurent Vigneron 2 1 Department algebras investigated here are particular cases of topological rough algebras introduced in [26]. We

  9. Engineering Gaussian disorder at rough interfaces for light trapping in thin-film solar cells

    E-Print Network [OSTI]

    Engineering Gaussian disorder at rough interfaces for light trapping in thin-film solar cells Piotr A theoretical study of randomly rough interfaces to obtain light trapping in thin-film silicon solar cells of thin-film solar cells. © 2012 Optical Society of America OCIS codes: 040.5350, 050.1950. Reducing

  10. An approximate model for the adhesive contact of rough viscoelastic surfaces

    E-Print Network [OSTI]

    Guillaume Haiat; Etienne Barthel

    2007-09-05

    Surface roughness is known to easily suppress the adhesion of elastic surfaces. Here a simple model for the contact of \\emph{viscoelastic} rough surfaces with significant levels of adhesion is presented. This approach is derived from our previous model [E. Barthel and G. Haiat {\\em Langmuir}, 18 9362 2002] for the adhesive contact of viscoelastic spheres. For simplicity a simple loading/unloading history (infinitely fast loading and constant pull-out velocity) is assumed. The model provides approximate analytical expressions for the asperity response and exhibits the full viscoelastic adhesive contact phenomenology such as stress relaxation inside the contact zone and creep at the contact edges. Combining this model with a Greenwood-Williamson statistical modeling of rough surfaces, we propose a quantitative assessment of the adhesion to rough viscoelastic surfaces. We show that moderate viscoelasticity efficiently restores adhesion on rough surfaces over a wide dynamic range.

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

    E-Print Network [OSTI]

    Svend-Age Biehs; Jean-Jacques Greffet

    2011-03-11

    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.

  12. A case study of pipeline route selection and design through discontinuous permafrost terrain in northwestern Alberta

    SciTech Connect (OSTI)

    Wiechnik, C.; Boivin, R.; Henderson, J.; Bowman, M.

    1996-12-31

    As the natural gas pipeline system in Western Canada expands northward, it traverses the discontinuous permafrost zone. As the ground temperature of the frozen soil in this zone is just below freezing, it can be expected that within the design life of a pipeline the permafrost adjacent to it will melt due to the disturbance of the insulating cover by construction activities. Differential settlement at the thawing frozen/unfrozen soil interfaces gives rise to pipeline strain. Based on the calculated settlement and resulting strain level, a cost effective mechanical or civil design solution can be selected to mitigate the differential settlement problem. Since these design solutions can be costly, it is desirable to combine them with a pipeline route that traverses the least amount of discontinuous permafrost terrain while minimizing the overall length of the pipeline. This paper will detail the framework utilized to select the routing for a package of pipeline projects in northwestern Alberta. It is believed that the increased front end effort will result in lower operating costs and an overall reduced life-cycle cost. This basic design methodology can be applied to any project that traverses discontinuous permafrost terrain.

  13. Accessible Parking Motorcycle Parking

    E-Print Network [OSTI]

    Nanyes, Ollie

    Hartmann Center Comstock Hall Holmes Main Street Parking Deck Transitional Parking Lot Lovelace JobstNorth Accessible Parking Motorcycle Parking Visitors Commuter Student Resident Student Resident St & Staff University Vehicles © Bradley University · 06/18/14 Emergency Phone Parking Legend FIJI

  14. Library Guide Access ... 3

    E-Print Network [OSTI]

    Steiner, Ullrich

    ____________________________ Library Guide 2012-2013 #12;Contents Access ... 3 Finding things ... 4-6 Layout and classification... 7 Floor plans ... 8-9 Borrowing things ... 10 Renewing and returning things;Sidney Sussex Library Guide 2012-2013 Welcome to the Richard Powell Library Tel: (01223) 338852 e

  15. Library Guide Access ... 3

    E-Print Network [OSTI]

    Steiner, Ullrich

    ____________________________ Library Guide 2014-2015 #12;Contents Access ... 3 Finding things ... 4-6 Layout and classification... 7 Floor plans ... 8-9 Borrowing things ... 10 Renewing and returning things;Sidney Sussex Library Guide 2014-2015 Welcome to the Richard Powell Library Tel: (01223) 338852 e

  16. Deregulation Direct Access

    E-Print Network [OSTI]

    Kammen, Daniel M.

    AB 1890 AB1X Aggregator Blue Book CEC CPUC CTC Deregulation Direct Access Divestiture DWR EOB EPAct an initiative on the ballot in response to the energy crisis. www.ftcr.org ESPs that sell electricity generated of peak demand. Investor Owned Utility. A private electric utility (owned by shareholders) regulated

  17. Special Access Programs

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2011-03-29

    This Order is for OFFICIAL USE ONLY and will not be distributed on the Directives' Portal. For distribution, please contact the Executive Secretary of the Special Access Program Oversight Committee at (202) 586-3345. Does not cancel/supersede other directives.

  18. Access for All 

    E-Print Network [OSTI]

    Stearns, Linda Lea Merenda

    2012-07-16

    district to determine if there is fair and equitable access for all students. The paper contains two major components. The first is quantitative study of the four entrance requirements for 8th grade Algebra I Pre-AP at a central Texas middle school...

  19. Development of an Integrated Sensor System for Obstacle Detection and Terrain Evaluation for Application to Unmanned Ground

    E-Print Network [OSTI]

    Florida, University of

    Development of an Integrated Sensor System for Obstacle Detection and Terrain Evaluation field of view of 50 degrees and 38 degrees, respectively. Two sensor systems were utilized to evaluate., Wexford Pennsylvania ABSTRACT This paper describes the development and performance of a sensor system

  20. Innovative Gamma Ray Spectrometer Detection Systems for Conducting Scanning Surveys on Challenging Terrain - 13583

    SciTech Connect (OSTI)

    Palladino, Carl; Mason, Bryan; Engle, Matt; LeVangie, James [The Palladino Company, Inc., 720 Fillmore St., San Francisco, CA 94117 (United States)] [The Palladino Company, Inc., 720 Fillmore St., San Francisco, CA 94117 (United States); Dempsey, Gregg [United States Environmental Protection Agency, P.O. Box 98517, Las Vegas, NV 89193-8517 (United States)] [United States Environmental Protection Agency, P.O. Box 98517, Las Vegas, NV 89193-8517 (United States); Klemovich, Ron [HydroGeoLogic, Inc., 6340 Glenwood, Suite 200, Building No. 7, Overland Park, KS 66202 (United States)] [HydroGeoLogic, Inc., 6340 Glenwood, Suite 200, Building No. 7, Overland Park, KS 66202 (United States)

    2013-07-01

    The Santa Susana Field Laboratory located near Simi Valley, California was investigated to determine the nature and extent of gamma radiation anomalies. The primary objective was to conduct gamma scanning surveys over 100 percent of the approximately 1,906,000 square meters (471 acre) project site with the most sensitive detection system possible. The site had challenging topography that was not conducive to traditional gamma scanning detection systems. Terrain slope varied from horizontal to 48 degrees and the ground surface ranged from flat, grassy meadows to steep, rocky hillsides. In addition, the site was home to many protected endangered plant and animal species, and archaeologically significant sites that required minimal to no disturbance of the ground surface. Therefore, four innovative and unique gamma ray spectrometer detection systems were designed and constructed to successfully conduct gamma scanning surveys of approximately 1,076,000 square meters (266 acres) of the site. (authors)

  1. Access Management Software Requirements Specification

    E-Print Network [OSTI]

    Maroncelli, Mark

    · Access to directory data · Emergency Rehire · Multiple IDs · Deceased Employee · Outreach Registration and Abbreviations Abbreviation Definition Group Collection of people who exist in the Penn State Directory. Role · Employee Confidentiality · Provisioning of an employee's digital Identity · Student early access

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

    SciTech Connect (OSTI)

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

    2008-11-11

    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.

  3. Very high efficiency phosphorescent organic light-emitting devices by using rough indium tin oxide

    SciTech Connect (OSTI)

    Zhang, Yingjie; Aziz, Hany, E-mail: h2aziz@uwaterloo.ca [Department of Electrical and Computer Engineering and Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1 (Canada)

    2014-07-07

    The efficiency of organic light-emitting devices (OLEDs) is shown to significantly depend on the roughness of the indium tin oxide (ITO) anode. By using rougher ITO, light trapped in the ITO/organic wave-guided mode can be efficiently extracted, and a light outcoupling enhancement as high as 40% is achieved. Moreover, contrary to expectations, the lifetime of OLEDs is not affected by ITO roughness. Finally, an OLED employing rough ITO anode that exhibits a current efficiency of 56?cd/A at the remarkably high brightness of 10{sup 5}?cd/m{sup 2} is obtained. This represents the highest current efficiency at such high brightness to date for an OLED utilizing an ITO anode, without any external light outcoupling techniques. The results demonstrate the significant efficiency benefits of using ITO with higher roughness in OLEDs.

  4. Comprehensive Evaluation Model of Building Energy Efficiency Based on Rough Sets Theory 

    E-Print Network [OSTI]

    Ding, L.; Ruan, X.; Huang, J.; Li, Y.

    2006-01-01

    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...

  5. Significance of the Casimir force and surface roughness for actuation dynamics of MEMS

    E-Print Network [OSTI]

    Wijnand Broer; George Palasantzas; Jasper Knoester; Vitaly B. Svetovoy

    2013-03-14

    Using the measured optical response and surface roughness topography as inputs, we perform realistic calculations of the combined effect of Casimir and electrostatic forces on the actuation dynamics of micro-electromechanical systems (MEMS). In contrast with the expectations, roughness can influence MEMS dynamics even at distances between bodies significantly larger than the root-mean-square roughness. This effect is associated with statistically rare high asperities that can be locally close to the point of contact. It is found that, even though surface roughness appears to have a detrimental effect on the availability of stable equilibria, it ensures that those equilibria can be reached more easily than in the case of flat surfaces. Hence our findings play a principal role for the stability of microdevices such as vibration sensors, switches, and other related MEM architectures operating at distances below 100 nm.

  6. Reduction of vortex induced forces and motion through surface roughness control

    DOE Patents [OSTI]

    Bernitsas, Michael M; Raghavan, Kamaldev

    2014-04-01

    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 decrease/suppress Vortex Induced Forces and Motion. Suppression is required when fluid-structure interaction becomes destructive as in VIM of flexible cylinders or rigid cylinders on elastic support, such as underwater pipelines, marine risers, tubes in heat exchangers, nuclear fuel rods, cooling towers, SPAR offshore platforms.

  7. Enhancement of vortex induced forces and motion through surface roughness control

    DOE Patents [OSTI]

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

    2011-11-01

    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).

  8. Solid Deuterium-Tritium Surface Roughness In A Beryllium Inertial Confinement Fusion Shell

    SciTech Connect (OSTI)

    Kozioziemski, B J; Sater, J D; Moody, J D; Montgomery, D S; Gautier, C

    2006-04-19

    Solid deuterium-tritium (D-T) fuel layers for inertial confinement fusion experiments were formed inside of a 2 mm diameter beryllium shell and were characterized using phase-contrast enhanced x-ray imaging. The solid D-T surface roughness is found to be 0.4 {micro}m for modes 7-128 at 1.5 K below the melting temperature. The layer roughness is found to increase with decreasing temperature, in agreement with previous visible light characterization studies. However, phase-contrast enhanced x-ray imaging provides a more robust surface roughness measurement than visible light methods. The new x-ray imaging results demonstrate clearly that the surface roughness decreases with time for solid D-T layers held at 1.5 K below the melting temperature.

  9. hp-finite-elements for simulating electromagnetic fields in optical devices with rough textures

    E-Print Network [OSTI]

    Burger, S; Hammerschmidt, M; Herrmann, S; Pomplun, J; Schmidt, F; Wohlfeil, B; Zschiedrich, L

    2015-01-01

    The finite-element method is a preferred numerical method when electromagnetic fields at high accuracy are to be computed in nano-optics design. Here, we demonstrate a finite-element method using hp-adaptivity on tetrahedral meshes for computation of electromagnetic fields in a device with rough textures. The method allows for efficient computations on meshes with strong variations in element sizes. This enables to use precise geometry resolution of the rough textures. Convergence to highly accurate results is observed.

  10. Development of an Immersed Boundary Method to Resolve Complex Terrain in the Weather Research and Forecasting Model

    SciTech Connect (OSTI)

    Lunquist, K A; Chow, F K; Lundquist, J K; Mirocha, J D

    2007-09-04

    Flow and dispersion processes in urban areas are profoundly influenced by the presence of buildings which divert mean flow, affect surface heating and cooling, and alter the structure of turbulence in the lower atmosphere. Accurate prediction of velocity, temperature, and turbulent kinetic energy fields are necessary for determining the transport and dispersion of scalars. Correct predictions of scalar concentrations are vital in densely populated urban areas where they are used to aid in emergency response planning for accidental or intentional releases of hazardous substances. Traditionally, urban flow simulations have been performed by computational fluid dynamics (CFD) codes which can accommodate the geometric complexity inherent to urban landscapes. In these types of models the grid is aligned with the solid boundaries, and the boundary conditions are applied to the computational nodes coincident with the surface. If the CFD code uses a structured curvilinear mesh, then time-consuming manual manipulation is needed to ensure that the mesh conforms to the solid boundaries while minimizing skewness. If the CFD code uses an unstructured grid, then the solver cannot be optimized for the underlying data structure which takes an irregular form. Unstructured solvers are therefore often slower and more memory intensive than their structured counterparts. Additionally, urban-scale CFD models are often forced at lateral boundaries with idealized flow, neglecting dynamic forcing due to synoptic scale weather patterns. These CFD codes solve the incompressible Navier-Stokes equations and include limited options for representing atmospheric processes such as surface fluxes and moisture. Traditional CFD codes therefore posses several drawbacks, due to the expense of either creating the grid or solving the resulting algebraic system of equations, and due to the idealized boundary conditions and the lack of full atmospheric physics. Meso-scale atmospheric boundary layer simulations, on the other hand, are performed by numerical weather prediction (NWP) codes, which cannot handle the geometry of the urban landscape, but do provide a more complete representation of atmospheric physics. NWP codes typically use structured grids with terrain-following vertical coordinates, include a full suite of atmospheric physics parameterizations, and allow for dynamic synoptic scale lateral forcing through grid nesting. Terrain following grids are unsuitable for urban terrain, as steep terrain gradients cause extreme distortion of the computational cells. In this work, we introduce and develop an immersed boundary method (IBM) to allow the favorable properties of a numerical weather prediction code to be combined with the ability to handle complex terrain. IBM uses a non-conforming structured grid, and allows solid boundaries to pass through the computational cells. As the terrain passes through the mesh in an arbitrary manner, the main goal of the IBM is to apply the boundary condition on the interior of the domain as accurately as possible. With the implementation of the IBM, numerical weather prediction codes can be used to explicitly resolve urban terrain. Heterogeneous urban domains using the IBM can be nested into larger mesoscale domains using a terrain-following coordinate. The larger mesoscale domain provides lateral boundary conditions to the urban domain with the correct forcing, allowing seamless integration between mesoscale and urban scale models. Further discussion of the scope of this project is given by Lundquist et al. [2007]. The current paper describes the implementation of an IBM into the Weather Research and Forecasting (WRF) model, which is an open source numerical weather prediction code. The WRF model solves the non-hydrostatic compressible Navier-Stokes equations, and employs an isobaric terrain-following vertical coordinate. Many types of IB methods have been developed by researchers; a comprehensive review can be found in Mittal and Iaccarino [2005]. To the authors knowledge, this is the first IBM approach that is able to

  11. Access to the ALS

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsicloudden Documentation DataStreamsTotalproposalsAboutAcceleratingthYourAccess to the

  12. Access to the ALS

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory of raregovAboutRecovery Act Recovery ActARMAccelerators,Access to the ALS

  13. Accessibility - Hanford Site

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory of raregovAboutRecovery Act Recovery ActARMAccelerators,Access to

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

    SciTech Connect (OSTI)

    Birdwell, Kevin R [ORNL

    2011-05-01

    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.

  15. Large-eddy simulations of surface roughness parameter sensitivity to canopy-structure characteristics

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Maurer, K. D.; Bohrer, G.; Kenny, W. T.; Ivanov, V. Y.

    2015-04-30

    Surface roughness parameters, namely the roughness length and displacement height, are an integral input used to model surface fluxes. However, most models assume these parameters to be a fixed property of plant functional type and disregard the governing structural heterogeneity and dynamics. In this study, we use large-eddy simulations to explore, in silico, the effects of canopy-structure characteristics on surface roughness parameters. We performed a virtual experiment to test the sensitivity of resolved surface roughness to four axes of canopy structure: (1) leaf area index, (2) the vertical profile of leaf density, (3) canopy height, and (4) canopy gap fraction.more »We found roughness parameters to be highly variable, but uncovered positive relationships between displacement height and maximum canopy height, aerodynamic canopy height and maximum canopy height and leaf area index, and eddy-penetration depth and gap fraction. We also found negative relationships between aerodynamic canopy height and gap fraction, as well as between eddy-penetration depth and maximum canopy height and leaf area index. We generalized our model results into a virtual "biometric" parameterization that relates roughness length and displacement height to canopy height, leaf area index, and gap fraction. Using a decade of wind and canopy-structure observations in a site in Michigan, we tested the effectiveness of our model-driven biometric parameterization approach in predicting the friction velocity over heterogeneous and disturbed canopies. We compared the accuracy of these predictions with the friction-velocity predictions obtained from the common simple approximation related to canopy height, the values calculated with large-eddy simulations of the explicit canopy structure as measured by airborne and ground-based lidar, two other parameterization approaches that utilize varying canopy-structure inputs, and the annual and decadal means of the surface roughness parameters at the site from meteorological observations. We found that the classical representation of constant roughness parameters (in space and time) as a fraction of canopy height performed relatively well. Nonetheless, of the approaches we tested, most of the empirical approaches that incorporate seasonal and interannual variation of roughness length and displacement height as a function of the dynamics of canopy structure produced more precise and less biased estimates for friction velocity than models with temporally invariable parameters.« less

  16. Terramechanical analysis of rover wheel mobility over simulated Martian terrain at various slip conditions and vertical loads

    E-Print Network [OSTI]

    Puszko, Gregory D

    2013-01-01

    Unmanned Mars rovers are presented with the unique challenge of requiring autonomous driving control over rough, adverse territory. A software package, dubbed Artemis, was developed in order to model the expected forces ...

  17. Approximating the Visible Region of a Point on a Terrain Boaz BenMoshe # Paz Carmi + Matthew J. Katz #

    E-Print Network [OSTI]

    Katz, Matthew "Matya"

    supporting ray shooting queries from p, due to Cole and Sharir [5], and its running time is O(n log 2 n. Katz # Abstract Given a terrain and a point p on or above it, we wish to compute the region R p that is visible from p. We present a generic radar­like algorithm for computing an approxima­ tion of R p

  18. Vehicle barrier with access delay

    DOE Patents [OSTI]

    Swahlan, David J; Wilke, Jason

    2013-09-03

    An access delay vehicle barrier for stopping unauthorized entry into secure areas by a vehicle ramming attack includes access delay features for preventing and/or delaying an adversary from defeating or compromising the barrier. A horizontally deployed barrier member can include an exterior steel casing, an interior steel reinforcing member and access delay members disposed within the casing and between the casing and the interior reinforcing member. Access delay members can include wooden structural lumber, concrete and/or polymeric members that in combination with the exterior casing and interior reinforcing member act cooperatively to impair an adversarial attach by thermal, mechanical and/or explosive tools.

  19. The friction factor of two-dimensional rough-boundary turbulent soap film flows

    E-Print Network [OSTI]

    Nicholas Guttenberg; Nigel Goldenfeld

    2009-03-25

    We use momentum transfer arguments to predict the friction factor $f$ in two-dimensional turbulent soap-film flows with rough boundaries (an analogue of three-dimensional pipe flow) as a function of Reynolds number Re and roughness $r$, considering separately the inverse energy cascade and the forward enstrophy cascade. At intermediate Re, we predict a Blasius-like friction factor scaling of $f\\propto\\textrm{Re}^{-1/2}$ in flows dominated by the enstrophy cascade, distinct from the energy cascade scaling of $\\textrm{Re}^{-1/4}$. For large Re, $f \\sim r$ in the enstrophy-dominated case. We use conformal map techniques to perform direct numerical simulations that are in satisfactory agreement with theory, and exhibit data collapse scaling of roughness-induced criticality, previously shown to arise in the 3D pipe data of Nikuradse.

  20. Rough surface electrical contact resistance considering scale dependent properties and quantum effects

    SciTech Connect (OSTI)

    Jackson, Robert L.; Crandall, Erika R.; Bozack, Michael J.

    2015-05-21

    The objective of this work is to evaluate the effect of scale dependent mechanical and electrical properties on electrical contact resistance (ECR) between rough surfaces. This work attempts to build on existing ECR models that neglect potentially important quantum- and size-dependent contact and electrical conduction mechanisms present due to the asperity sizes on typical surfaces. The electrical conductance at small scales can quantize or show a stepping trend as the contact area is varied in the range of the free electron Fermi wavelength squared. This work then evaluates if these effects remain important for the interface between rough surfaces, which may include many small scale contacts of varying sizes. The results suggest that these effects may be significant in some cases, while insignificant for others. It depends on the load and the multiscale structure of the surface roughness.

  1. Information Access Router for Integrated Information Access System Koji Murakami

    E-Print Network [OSTI]

    Information Access Router for Integrated Information Access System Koji Murakami Department System (IIAS) that accepts diverse kinds of questions and provides the requested information in the most will report on the implementation of one important com- ponent of the system, the Information Ac- cess Router

  2. General contact mechanics theory for randomly rough surfaces with application to rubber friction

    E-Print Network [OSTI]

    Michele Scaraggi; Bo N. J. Persson

    2015-06-23

    We generalize the Persson contact mechanics and rubber friction theory to the case where both surfaces have surface roughness. The solids can be rigid, elastic or viscoelastic, and can be homogeneous or layered. We calculate the contact area, the viscoelastic contribution to the friction force, and the average interfacial separation as a function of the sliding speed and the nominal contact pressure. We illustrate the theory with numerical results for a rubber block sliding on a road surface. We find that with increasing sliding speed, the influence of the roughness on the rubber block decreases, and for typical sliding speeds involved in tire dynamics it can be neglected.

  3. Effect of surface roughness and polymeric additive on nucleate pool boiling at subatmospheric pressures

    SciTech Connect (OSTI)

    Tewari, P.K.; Verma, R.K.; Ramani, M.P.S.; Mahajan, S.P.

    1986-09-01

    This investigation pertains to boiling heat transfer from a submerged flat surface at subatmospheric and atmospheric pressures in the presence of hydroxy ethyl cellulose (HEC) as a polymeric additive in small doses. Boiling was carried out in presence of the additive on smooth and rough aluminium surfaces having effective cavity size within the range as predicted by Hsu model and the pressure was kept in the range of 8 - 100 KN/sq.m (abs). Effects of surface roughness, saturation pressure and polymer concentration on boiling heat transfer were studied and the results were compared with Rohsenow's correlation.

  4. TABLE OF CONTENTS Safe Access

    E-Print Network [OSTI]

    US Army Corps of Engineers

    , construction, and maintenance of the means of access, and b. Erection and dismantling procedures of scaffolds, including provisions for providing fall protection (FP) during the erection or dismantling when the erection or dismantling involves work at heights. > See Sections 21.K.02 and 22.A.03. 24.A.03 Job-made means of access

  5. Remote direct memory access

    DOE Patents [OSTI]

    Archer, Charles J.; Blocksome, Michael A.

    2012-12-11

    Methods, parallel computers, and computer program products are disclosed for remote direct memory access. Embodiments include transmitting, from an origin DMA engine on an origin compute node to a plurality target DMA engines on target compute nodes, a request to send message, the request to send message specifying a data to be transferred from the origin DMA engine to data storage on each target compute node; receiving, by each target DMA engine on each target compute node, the request to send message; preparing, by each target DMA engine, to store data according to the data storage reference and the data length, including assigning a base storage address for the data storage reference; sending, by one or more of the target DMA engines, an acknowledgment message acknowledging that all the target DMA engines are prepared to receive a data transmission from the origin DMA engine; receiving, by the origin DMA engine, the acknowledgement message from the one or more of the target DMA engines; and transferring, by the origin DMA engine, data to data storage on each of the target compute nodes according to the data storage reference using a single direct put operation.

  6. A quantum access network

    E-Print Network [OSTI]

    Bernd Fröhlich; James F. Dynes; Marco Lucamarini; Andrew W. Sharpe; Zhiliang Yuan; Andrew J. Shields

    2014-09-02

    The theoretically proven security of quantum key distribution (QKD) could revolutionise how information exchange is protected in the future. Several field tests of QKD have proven it to be a reliable technology for cryptographic key exchange and have demonstrated nodal networks of point-to-point links. However, so far no convincing answer has been given to the question of how to extend the scope of QKD beyond niche applications in dedicated high security networks. Here we show that adopting simple and cost-effective telecommunication technologies to form a quantum access network can greatly expand the number of users in quantum networks and therefore vastly broaden their appeal. We are able to demonstrate that a high-speed single-photon detector positioned at a network node can be shared between up to 64 users for exchanging secret keys with the node, thereby significantly reducing the hardware requirements for each user added to the network. This point-to-multipoint architecture removes one of the main obstacles restricting the widespread application of QKD. It presents a viable method for realising multi-user QKD networks with resource efficiency and brings QKD closer to becoming the first widespread technology based on quantum physics.

  7. Distance-based accessibility indices

    E-Print Network [OSTI]

    Csató, László

    2015-01-01

    The paper attempts to develop a suitable accessibility index for networks where each link has a value such that a smaller number is preferred like distance, cost, or travel time. A measure called distance sum is characterized by three independent properties: anonymity, an appropriately chosen independence axiom, and dominance preservation, which requires that a node not far to any other is at least as accessible. We argue for the need of eliminating the independence property in certain applications. Therefore generalized distance sum, a family of accessibility indices, will be suggested. It is linear, considers the accessibility of vertices besides their distances and depends on a parameter in order to control its deviation from distance sum. Generalized distance sum is anonymous and satisfies dominance preservation if its parameter meets a sufficient condition. Two detailed examples demonstrate its ability to reflect the vulnerability of accessibility to link disruptions.

  8. Atmospheric Momentum Roughness Applied to Stage-Discharge Relationships in Flood Plains

    E-Print Network [OSTI]

    Atmospheric Momentum Roughness Applied to Stage-Discharge Relationships in Flood Plains Jennifer M and discharge relationship for turbulent flows over vegetated flood plains. The model is based on the turbulent sites. The model estimates of the flood flow discharges from a natural site are compared to observed

  9. Numerical method for calculating the apparent eddy current conductivity loss on randomly rough surfaces

    E-Print Network [OSTI]

    Nagy, Peter B.

    Numerical method for calculating the apparent eddy current conductivity loss on randomly rough Because of their frequency-dependent penetration depth, eddy current measurements are capable of mapping of eddy current conductivity, thereby decreasing the accuracy of the measurements, especially in thermally

  10. A simple numerical model of the apparent loss of eddy current conductivity due to surface roughness

    E-Print Network [OSTI]

    Nagy, Peter B.

    A simple numerical model of the apparent loss of eddy current conductivity due to surface roughness of eddy current conductivity has been suggested as a possible means to allow the nondestructive evaluation, the path of the eddy current must follow a more tortuous route in the material, which produces a reduction

  11. Importance of thermal effects and sea surface roughness for offshore wind resource assessment

    E-Print Network [OSTI]

    Heinemann, Detlev

    Importance of thermal effects and sea surface roughness for offshore wind resource assessment National Laboratory, Roskilde, Denmark Abstract The economic feasibility of offshore wind power utilisation depends on the favourable wind conditions offshore compared to sites on land, which have to compensate

  12. FRICTION FACTOR IN HIGH PRESSURE NATURAL GAS PIPELINES FROM ROUGHNESS MEASUREMENTS

    E-Print Network [OSTI]

    Gudmundsson, Jon Steinar

    FRICTION FACTOR IN HIGH PRESSURE NATURAL GAS PIPELINES FROM ROUGHNESS MEASUREMENTS DETERMINATION DU and Technology, Norway ABSTRACT Pressure drop experiments on natural gas flow at 80 to 120 bar pressure and high of natural gas at typical operating pressures (100-180 bar). At such Reynolds numbers the classical Colebrook

  13. Flow over rough topography. A preliminary study with high resolution topography at Ormen Lange

    E-Print Network [OSTI]

    Avlesen, Helge

    Flow over rough topography. A preliminary study with high resolution topography at Ormen Lange not able to march as long in time as desired, due to stability issues. On the given topography for selected horizontal sections, after im- posing a constant velocity flow over the given topography

  14. Under consideration for publication in J. Fluid Mech. 1 Nonlinear dynamics over rough topography

    E-Print Network [OSTI]

    Vanneste, Jacques

    Under consideration for publication in J. Fluid Mech. 1 Nonlinear dynamics over rough topography-dimensional, pe- riodic or random, small-scale topography is investigated using an asymptotic approach. Averaged (or homogenised) evolution equations which account for the flow-topography in- teraction are derived

  15. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 1 A Simplified Formulation for Rough Surface

    E-Print Network [OSTI]

    IEEEProof IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 1 A Simplified Formulation for Rough paper. To download the IEEE Taxonomy, go to http://www.30 ieee.org/documents/taxonomy_v101.pdf.31 I, OH 43210 USA. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee

  16. Effect of Substrate Roughness on D Spacing Supports Theoretical Resolution of Vapor Pressure Paradox

    E-Print Network [OSTI]

    Nagle, John F.

    Effect of Substrate Roughness on D Spacing Supports Theoretical Resolution of Vapor Pressure with and provides experimental support for a recently proposed theoretical resolution of the vapor pressure paradox has been called the vapor pressure paradox (Rand and Parsegian, 1989). Resolving this paradox

  17. Stress Drop during Earthquakes: Effect of Fault Roughness Scaling by Thibault Candela, Franois Renard,*

    E-Print Network [OSTI]

    Schmittbuhl, Jean

    Stress Drop during Earthquakes: Effect of Fault Roughness Scaling by Thibault Candela, François parameter of static stress drop during an earthquake is related to the scaling properties of the fault and focusing on elastic deformation of the topography, which is the dominant mode at large scales, the stress

  18. Hydrothermal coupling in a self-affine rough fracture A. Neuville,* R. Toussaint, and J. Schmittbuhl

    E-Print Network [OSTI]

    Schmittbuhl, Jean

    - thermics is an intensively developing field. Deep enhanced geothermal systems EGSs are based on the energy the hydraulic flow and subse- quently to enhance the thermal exchange. Fracture roughness might, in the opposite as an ellipse or a poly- hedron. This is the case in most fracture network models used for geothermal 10

  19. Roughly 120 years ago, an incon-spicuous pest took a ride on a

    E-Print Network [OSTI]

    Latchininsky, Alexandre

    Roughly 120 years ago, an incon- spicuous pest took a ride on a ship from Europe bound discussed the projects he had avail- able, the horn fly project fit best with my background. Horn Fly First, the cattle use costly energy meant for growth to rid themselves of the flies. Some of the behavioral changes

  20. Hydro-thermal flow in a rough fracture EC Contract SES6-CT-2003-502706

    E-Print Network [OSTI]

    Toussaint, Renaud

    Hydro-thermal flow in a rough fracture EC Contract SES6-CT-2003-502706 PARTICIPANT ORGANIZATION NAME: CNRS Synthetic 2nd year report Related with Work Package............ HYDRO-THERMAL FLOW in the influence of a realistic geometry of the fracture on its hydro-thermal response. Several studies have

  1. Relations in Mathematical Morphology with applications to Graphs and Rough Sets

    E-Print Network [OSTI]

    Stell, John

    School of Computing, University of Leeds Leeds, LS2 9JT, U.K. jgs@comp.leeds.ac.uk Abstract. Rough sets of morphology for graphs. The structure of the paper is as follows. I begin in Section 2 with a brief review

  2. Light trapping in thin-film solar cells with randomly rough and hybrid

    E-Print Network [OSTI]

    Light trapping in thin-film solar cells with randomly rough and hybrid textures Piotr Kowalczewski. M. Smets, and M. Zeman, "Plasmonic light trapping in thin-film silicon solar cells with improved Lambertian limits in thin film silicon solar cells with 1D and 2D periodic patterns," Opt. Express 20, A224­A

  3. ENGINEERED SUBSTRATES FOR THIN-FILM SOLAR CELLS: SCATTERING PROPERTIES OF 1D ROUGHNESS

    E-Print Network [OSTI]

    ENGINEERED SUBSTRATES FOR THIN-FILM SOLAR CELLS: SCATTERING PROPERTIES OF 1D ROUGHNESS S. Del Sorbo, Optical Properties, Substrates, Texturisation, Thin Film Solar Cells 1 MOTIVATION OF THIS WORK The aim of thin film technology is to reduce both the electrical transport losses in the bulk region of a solar

  4. Molecular Dynamics Simulation of Thin Films with Rough and Asymmetric Interfaces

    E-Print Network [OSTI]

    Walker, D. Greg

    Molecular Dynamics Simulation of Thin Films with Rough and Asymmetric Interfaces N.A. Roberts with the use of interfaces and shows that pristine, imperfect and asymmetric interfaces in thin films can interface whose features are of the order of the phonon wavelength. At a constant temperature difference

  5. Gravitational quantum states of neutrons in a rough waveguide A. E. Meyerovich

    E-Print Network [OSTI]

    Meyerovich, Alex

    of such states is indeed a major experimental challenge. What is more, the measure- ments in this energy range/absorber. The analysis is based on a recently developed theory of quantum transport along random rough walls which and are more efficient than the processes involving the intermediate states. The theoretical results

  6. Effect of surface roughness on magnetic domain wall thickness, domain size, and coercivity

    E-Print Network [OSTI]

    Wang, Gwo-Ching

    , Rensselaer Polytechnic Institute, Troy, New York 12180-3590 G. Palasantzas and J. Th. M. De Hosson Department nm thick deposited on plasma etched Si 100 substrates showed that, by increasing surface rough- ness nearly linearly with film thickness. Such an increase of the thickness fluctuations5 was attributed

  7. Access Digital Library, Search, News and more

    E-Print Network [OSTI]

    Goodrich, Lisa V.

    [General] Access Digital Library, Search, News and more [Education] Access MyCourses content [Research] Access Digital Library, NCBI Blast and more [Personal] Access your portable bookmarks using My and 500 textbooks via the Digital Library, one click access to NCBI Blast sequence databases. [General

  8. Large eddy simulations of surface roughness parameter sensitivity to canopy-structure characteristics

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Maurer, K. D.; Bohrer, G.; Ivanov, V. Y.

    2014-11-27

    Surface roughness parameters are at the core of every model representation of the coupling and interactions between land-surface and atmosphere, and are used in every model of surface fluxes. However, most models assume these parameters to be a fixed property of plant functional type and do not vary them in response to spatial or temporal changes to canopy structure. In part, this is due to the difficulty of reducing the complexity of canopy structure and its spatiotemporal dynamic and heterogeneity to less than a handful of parameters describing its effects of atmosphere–surface interactions. In this study we use large-eddy simulationsmore »to explore, in silico, the effects of canopy structure characteristics on surface roughness parameters. We performed a virtual experiment to test the sensitivity of resolved surface roughness to four axes of canopy structure: (1) leaf area index, (2) the vertical profile of leaf density, (3) canopy height, and (4) canopy gap fraction. We found roughness parameters to be highly variable, but were able to find positive relationships between displacement height and maximum canopy height, aerodynamic canopy height and maximum canopy height and leaf area index, and eddy-penetration depth and gap fraction. We also found negative relationships between aerodynamic canopy height and gap fraction, and between eddy-penetration depth and maximum canopy height and leaf area index. Using a decade of wind and canopy structure observations in a site in Michigan, we tested the effectiveness of our model-resolved parameters in predicting the frictional velocity over heterogeneous and disturbed canopies. We compared it with three other semi-empirical models and with a decade of meteorological observations. We found that parameterizations with fixed representations of roughness performed relatively well. Nonetheless, some empirical approaches that incorporate seasonal and inter-annual changes to the canopy structure performed even better than models with temporally fixed parameters.« less

  9. Fall Graduation Access Information Accessibility, Wheelchairs, and Disability

    E-Print Network [OSTI]

    needs parking pass" on the dashboard of the car. The first two parking bays in the lot nearest Cassell in the portal areas. The band platform area is not accessible for wheelchairs (between Aisles 11 and 13). #12

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

    Broader source: Energy.gov [DOE]

    A vulnerability was reported in RSA Access Manager. A remote user can gain access to the target system.

  11. ACADEMIC AFFAIRS ACCESS AND ADMINISTRATION

    E-Print Network [OSTI]

    Arnold, Elizabeth A.

    , Accounting Operations & Disbursements Copy Centers Dining Services Facilities Management Finance Human & Reporting Prospect Research Quality Assurance Campaign Management College Engagement Donor RelationsACADEMIC AFFAIRS ACCESS AND ENROLLMENT MANAGEMENT ADMINISTRATION AND FINANCE STUDENT AFFAIRS

  12. Surface roughness and interface width scaling of magnetron sputter deposited Ni/Ti multilayers

    SciTech Connect (OSTI)

    Maidul Haque, S.; Biswas, A.; Tokas, R. B.; Bhattacharyya, D.; Sahoo, N. K.; Bhattacharya, Debarati

    2013-09-14

    Using an indigenously built r.f. magnetron sputtering system, several single layer Ti and Ni films have been deposited at varying deposition conditions. All the samples have been characterized by Grazing Incidence X-ray Reflectivity (GIXR) and Atomic Force Microscopy to estimate their thickness, density, and roughness and a power law dependence of the surface roughness on the film thickness has been established. Subsequently, at optimized deposition condition of Ti and Ni, four Ni/Ti multilayers of 11-layer, 21-layer, 31-layer, and 51-layer having different bilayer thickness have been deposited. The multilayer samples have been characterized by GIXR and neutron reflectivity measurements and the experimental data have been fitted assuming an appropriate sample structure. A power law correlation between the interface width and bilayer thickness has been observed for the multilayer samples, which was explained in the light of alternate roughening/smoothening of multilayers and assuming that at the interface the growth “restarts” every time.

  13. Wetting Transitions of Condensed Droplets on Superhydrophobic Surfaces with Two-Tier Roughness

    E-Print Network [OSTI]

    Lv, Cunjing; Zhang, Xiwen; He, Feng

    2015-01-01

    Although realizing wetting transitions of droplets spontaneously on solid rough surfaces is quite challenging, it is becoming a key research topic in many practical applications which require highly efficient removal of liquid. We report wetting transitions of condensed droplets occurring spontaneously on pillared surfaces with two-tier roughness owing to excellent superhydrophobicity. The phenomenon results from further decreased Laplace pressure on the top side of the individual droplet when its size becomes comparable to the scale of the micropillars, which leads to a surprising robust spontaneous wetting transition, from valleys to tops of the pillars. A simple scaling law is derived theoretically, which demonstrates that the critical size of the droplet is determined by the space of the micropillars. For this reason, highly efficient removal of water benefits greatly from smaller micropillar space. Furthermore, three wetting transition modes exist, in which the in situ wetting behaviors are in good agree...

  14. Interfacial Friction in Gas-Liquid Annular Flow: Analogies to Full and Transition Roughness

    SciTech Connect (OSTI)

    Bauer, R.C.; Beus, S.G.; Fore, L.B.

    1999-03-01

    New film thickness and pressure gradient data were obtained in a 5.08 by 101.6 mm duct for nitrogen and water in annular flow. Pressures of 3.4 and 17 atm and temperatures of 38 and 93 C were used to vary the gas density and liquid viscosity. These data are used to compute interfacial shear stresses and interfacial friction factors for comparison with several accepted literature correlations. These comparisons are reasonable for small values of the relative film thickness. However, the new data cover conditions not approached by the data used to construct those correlations. By combining the current data with the results of two other comprehensive modern experimental studies, a new correlation for the interfacial friction factor has been developed. This correlation adds elements of transition roughness to Wallis' fully-rough analogy to better predict interfacial friction factors over a wide range of gas Reynolds numbers and liquid film thicknesses.

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

    DOE Patents [OSTI]

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

    2002-01-01

    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.

  16. Energy production rates in fluid mixtures of inelastic rough hard spheres

    E-Print Network [OSTI]

    Andrés Santos; Gilberto M. Kremer; Vicente Garzó

    2010-07-16

    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.

  17. Molecular Dynamics Simulation Study of Interaction between Model Rough Hydrophobic Surfaces

    E-Print Network [OSTI]

    Changsun Eun; Max L. Berkowitz

    2011-06-01

    We study some aspects of hydrophobic interaction between molecular rough and flexible model surfaces. The model we use in this work is based on a model we used previously (Eun, C.; Berkowitz, M. L. J. Phys. Chem. B 2009, 113, 13222-13228), when we studied the interaction between model patches of lipid membranes. Our original model consisted of two graphene plates with attached polar headgroups; the plates were immersed in a water bath. The interaction between such plates can be considered as an example of a hydrophilic interaction. In the present work we modify our previous model by removing the charge from the zwitterionic headgroups. As a result of this procedure, the plate character changes; it becomes hydrophobic. By separating the total interaction (or potential of mean force, PMF) between plates into the direct and the water-mediated interactions we observe that the latter changes from repulsive to attractive, clearly emphasizing the important role of water as a medium. We also investigate the effect of roughness and flexibility of the headgroups on the interaction between plates and observe that roughness enhances the character of the hydrophobic interaction. The presence of a dewetting transition in a confined space between charge-removed plates confirms that the interaction between plates is strongly hydrophobic. In addition, we notice that there is a shallow local minimum in the PMF in case of charge-removed plates. We find that this minimum is associated with the configurational changes that flexible headgroups undergo, as the two plates are brought together.

  18. The Effect of Excimer Laser Treatment on the Surface Roughness and Fracture Strength of Alumina Substrates

    SciTech Connect (OSTI)

    Smoot, J.E.

    1998-05-13

    The microelectronics industry requires alumina substrates with exceptionally smooth surfaces and few surface defects to allow successful deposition of metallic films for reliable electronic performance. Irradiation by a 248-nm wavelength excimer laser beam (KrF) at a fluence of 125 mJ/mm{sup 2} and at various angles of incidence is shown to significantly reduce the surface roughness of alumina substrates. However, irradiation also creates a fine particulate deposit of alumina that only partially adheres to the substrate and impedes deposition of metal films. Annealing in air between 1350 C and 1450 C was found to remove the particles by sintering. As-received material showed surface roughness average (R{sub a}) mean values of 457 nm, which was reduced to 60 nm (mean) following irradiation and 71 nm (mean) following irradiation and annealing at 1350 C. Irradiation also produced a decrease in the number and severity of surface defects. The flexural strength and Weibull modulus were both increased by laser irradiation and thermal treatment. Flexural strength went from an as-received value of 450 MPa to 560 MPa following irradiation/sintering, measured at 10% probability of failure. The Weibull modulus was increased from the as-received value of about 9, to about 13 following irradiation/sintering. It was concluded that irradiation at an angle of incidence of 60{degree} from perpendicular was most effective in producing a low surface roughness.

  19. Lamellar Diblock Copolymers on Rough Substrates: Self-consistent Field Theory Studies

    E-Print Network [OSTI]

    Xingkun Man; Jiuzhou Tang; Pan Zhou; Dadong Yan; David Andelman

    2015-08-18

    We present numerical calculations of lamellar phases of di-block copolymers (BCP) confined between two surfaces, where the top surface is flat and the bottom one is corrugated. The corrugated substrate is assumed to have a single $q$-mode of lateral undulations with a wavenumber q_s and amplitude R. We focus on the effects of substrate roughness, parameterized by the dimensionless quantity, q_sR, on the relative stability between parallel and perpendicular orientations of the lamellar phase. The competition between film confinement, energy cost of elastic deformation and gain in surface energy induces a parallel-to-perpendicular transition of the BCP lamellae. Employing self-consistent field theory (SCFT), we study the critical substrate roughness value corresponding to this transition. The critical value increases as function of the surface preference towards one of the two BCP components, and as function of film thickness. But, it decreases with increasing values of the Flory-Huggins parameter. Our findings are equivalent to stating that the critical value decreases as the BCP molecular weight or the natural BCP periodicity increases. We further show that the rough substrate can overcome the formation of parallel lamellae in cases where the top surface has a preference towards one of the two BCP components. Our results are in good agreement with previous experiments, and highlight the physical conditions behind the perpendicular orientation of lamellar phases, as is desired in nanolithography and other industrial applications.

  20. Forests for People Access, recreation & tourism

    E-Print Network [OSTI]

    Strategy Forests for People Access, recreation & tourism on the national forest estate #12;#12;Access, recreation and tourism on the national forest estate | 3 Forests for People Access, recreation and tourism on the national forest estate Setting the scene Everyone has a right of responsible access

  1. LOCH: Open Access Implementation Responsibility Matrix 

    E-Print Network [OSTI]

    Krzak, Anna

    2015-02-05

    Draft Responsibility Matrix for College of Medicine and Veterinary Medicine for REF Open Access requirements implementation.

  2. PennAccess: Towne Building Entrance Information

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    PennAccess: Towne Building Entrance Information: 220 South 33rd Street . Philadelphia . PA . 19104 1. Towne Building is accessible through the main entrance to Levine Hall off Chancellor Walk. This entrance does not access the basement of the Towne Building. 2. There is also access through the Levine

  3. Effect of the porosity on the fracture surface roughness of sintered materials: From anisotropic to isotropic self-affine scaling

    E-Print Network [OSTI]

    Tristan Cambonie; Jonathan Bares; Lamine Hattali; Daniel Bonamy; Véronique Lazarus; Harold Auradou

    2015-01-16

    To unravel how the microstructure affects the fracture surface roughness in heterogeneous brittle solids like rocks or ceramics, we characterized the roughness statistics of post-mortem fracture surfaces in home-made materials of adjustable microstructure length-scale and porosity, obtained by sintering monodisperse polystyrene beads. Beyond the characteristic size of disorder, the roughness profiles are found to exhibit self-affine scaling features evolving with porosity. Starting from a null value and increasing the porosity, we quantitatively modify the self-affine scaling properties from anisotropic (at low porosity) to isotropic (for porosity larger than 10 %).

  4. Cybersecurity Framework AccessControl

    E-Print Network [OSTI]

    Cybersecurity Framework AccessControl Policy Machine Cloud Computing Cryptography Evaluation Guidelines Standards Systems SecurityPractices Critical Infrastructure Verification Security Controls Assets-170 Computer Security Division 2013 Annual Report #12;#12;NIST Special Publication 800-170 Computer Security

  5. open access journal Public Health

    E-Print Network [OSTI]

    Oakley, Jeremy

    open access journal Journal of Public Health in AfricaeISSN 2038-9930 i www the Journal of Public Health in Africa is a peer-reviewed, electronic quarterly, that focuses on health issues in the African continent. The journal editors seek high quality original articles on public health related issues

  6. RESTRICTED ACCESS to Groat Road

    E-Print Network [OSTI]

    MacMillan, Andrew

    RESTRICTED ACCESS to Dudely B Menzies Bridge to Kinsmen Park to High Level Bridge to Groat Road 89 Ave Edinboro Road Saskatchewan Drive Saskatchewan Drive Saskatchewan Drive 88 Corbett Field West Aberhart Centre Childcare Centre South Field Car Park Thermal Energy Storage Corbett Hall Canadian Blood

  7. Single-layer MoS{sub 2} roughness and sliding friction quenching by interaction with atomically flat substrates

    SciTech Connect (OSTI)

    Quereda, J.; Castellanos-Gomez, A.; Agraït, N.; Rubio-Bollinger, G.

    2014-08-04

    We experimentally study the surface roughness and the lateral friction force in single-layer MoS{sub 2} crystals deposited on different substrates: SiO{sub 2}, mica, and hexagonal boron nitride (h-BN). Roughness and sliding friction measurements are performed by atomic force microscopy. We find a strong dependence of the MoS{sub 2} roughness on the underlying substrate material, being h-BN the substrate which better preserves the flatness of the MoS{sub 2} crystal. The lateral friction also lowers as the roughness decreases, and attains its lowest value for MoS{sub 2} flakes on h-BN substrates. However, it is still higher than for the surface of a bulk MoS{sub 2} crystal, which we attribute to the deformation of the flake due to competing tip-to-flake and flake-to-substrate interactions.

  8. Rough contact mechanics for graded bulk rheology: The role of small-scale wavelengths on rubber friction

    E-Print Network [OSTI]

    Michele Scaraggi; Davide Comingio

    2015-10-13

    We present a numerical model for the prediction of the rough contact mechanics of a viscoelastic block, with graded rheology, in steady sliding contact with a randomly rough rigid surface. In particular, we derive the effective surface response of a stepwise or continuously-graded block in the Fourier domain, which is then embedded in a Fourier-based residuals molecular dynamic formulation of the contact mechanics. Finally we discuss on the role of small-scale wavelengths on rubber friction and contact area, and we demonstrate that the rough contact mechanics exhibits effective interface properties which converge to asymptotes upon increase of the small-scale roughness content, when a realistic rheology of the confinement is taken into account.

  9. MEMS-based contact stress field measurements at a rough elastomeric layer: local test of Amontons' friction law in static

    E-Print Network [OSTI]

    Adda-Bedia, Mokhtar

    MEMS-based contact stress field measurements at a rough elastomeric layer: local test of Amontons/Universit´e Paris 6, Paris, France Abstract. We present the results of recent friction experiments in which a MEMS

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

    E-Print Network [OSTI]

    Chen, Yi-Leng

    of Hawaii during HaRP YANG YANG AND YI-LENG CHEN Department of Meteorology, SOEST, University of Hawaii at Manoa, Honolulu, Hawaii (Manuscript received 9 August 2006, in final form 23 April 2007) ABSTRACT Islands in Hawaii have different sizes and terrain heights with notable differences in climate and weather

  11. Assessing Terrain Stability in a GIS using SINMAP Pack, R.T. Research Associate Professor, Tarboton, D.G., Associate Professor1

    E-Print Network [OSTI]

    Tarboton, David

    Assessing Terrain Stability in a GIS using SINMAP Pack, R.T. Research Associate Professor, Tarboton State University, Logan, UT 84322-5230 Presented at the 15th annual GIS conference, GIS 2001, February 19-22, Vancouver, British Columbia Abstract SINMAP (Stability Index MAPping) is an ArcView GIS

  12. Effects of grit roughness and pitch oscillations on the S814 airfoil

    SciTech Connect (OSTI)

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

    1996-07-01

    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.

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

    SciTech Connect (OSTI)

    Rich Johnson; Yu-Hsin Tung; Hiroyuki Sato

    2011-07-01

    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.

  14. Force and torque acting on particles in a transitionally rough open channel flow

    E-Print Network [OSTI]

    Chan-Braun, Clemens; Uhlmann, Markus

    2011-01-01

    Direct numerical simulation of open channel flow over a geometrically rough wall has been performed at a bulk Reynolds number of approximately 2900. The wall consisted of a layer of spheres in a square arrangement. Two cases have been considered. In the first case the spheres are small (with diameter equivalent to 10.7 wall units) and the limit of the hydraulically smooth flow regime is approached. In the second case the spheres are more than three times larger (49.3 wall units) and the flow is in the transitionally rough flow regime. Special emphasis is given on the characterisation of the force and torque acting on a particle due to the turbulent flow. It is found that in both cases the mean drag, lift and spanwise torque are to a large extent produced at the top region of the particle surface. The intensity of the particle force fluctuations is significantly larger in the large-sphere case, while the trend differs for the fluctuations of the individual components of the torque. A simplified model is used t...

  15. Steady state in a gas of inelastic rough spheres heated by a uniform stochastic force

    E-Print Network [OSTI]

    Francisco Vega Reyes; Andrés Santos

    2015-11-04

    We study here the steady state attained in a granular gas of inelastic rough spheres that is subject to a spatially uniform random volume force. The stochastic force has the form of the so-called white noise and acts by adding impulse to the particle translational velocities. We work out an analytical solution of the corresponding velocity distribution function from a Sonine polynomial expansion that displays energy non-equipartition between the translational and rotational modes, translational and rotational kurtoses, and translational-rotational velocity correlations. By comparison with a numerical solution of the Boltzmann kinetic equation (by means of the Direct Simulation Monte Carlo method) we show that our analytical solution provides a good description that is quantitatively very accurate in certain ranges of inelasticity and roughness. We also find three important features that make the forced granular gas steady state very different from the homogeneous cooling state (attained by an unforced granular gas). First, the marginal velocity distributions are always close to a Maxwellian. Second, there is a continuous transition to the purely smooth limit (where the effects of particle rotations are ignored). And third, the angular translational-rotational velocity correlations show a preference for a quasiperpendicular mutual orientation (which is called "lifted-tennis-ball" behavior).

  16. Subject Access to Your Information 

    E-Print Network [OSTI]

    Tucker, Sandra

    2006-08-01

    =ISO-8859-1 Subject Access to Your Information Sandy Tucker Texas A&M University Libraries August 1, 2006 Second International Symposium on Transportation Technology Transfer Introduction You have packages ? books, pamphlets, files, electronic... Lists Transportation Research Thesaurus Your own list Use a Short List or a Long List of Terms? If you have a small collection, a short list of terms is appropriate. If you have a large collection, a longer list of more specific terms...

  17. Alexandria Digital Library Project Content Access Characterization

    E-Print Network [OSTI]

    Janée, Greg

    Alexandria Digital Library Project Content Access Characterization in Digital Libraries Greg Janée · James Frew · David Valentine University of California, Santa Barbara #12;Alexandria Digital Library environments e.g., GIS #12;Alexandria Digital Library Project Janée, Frew, Valentine · Content Access

  18. Metropolitan Accessibility and Transportation Sustainability:Sustainability

    E-Print Network [OSTI]

    Papalambros, Panos

    Metropolitan Accessibility and Transportation Sustainability:Sustainability: Comparative Reduce (fulfillment of)Promote Sustainability: Meet needs of (fulfillment of) needs present Institute SMART Sustainable Mobility and Accessibility Research andSMART Sustainable Mobility

  19. HM-ACCESS Project | Department of Energy

    Office of Environmental Management (EM)

    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 Electronic...

  20. Premier Access Insurance Company Certificate of Insurance

    E-Print Network [OSTI]

    Leistikow, Bruce N.

    Premier Access Insurance Company Certificate of Insurance Policy/Group Number: 3725 We certify provided by Premier Access Insurance Company for You and Your eligible Dependents. All terms and benefits...................................................... Family Deductible Amount

  1. Identity, Credential, and Access Management (ICAM)

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2013-02-19

    To establish requirements and responsibilities for DOE identity, credential, and access management program. Cancels DOE N 206.4.

  2. Characterizing Open Access Publishing at Your Institution 

    E-Print Network [OSTI]

    Hubbard, David E.; Li, Yu

    2014-11-03

    Medical Library, 2008) Open Access (OA) “… digital, online, free of charge, and free of most copyright and licensing restrictions.” (Suber, 2012, p. 4) “Flavors” of Open Access Gold: provide immediate open access, peer reviewed; authors retain copyright... Green: self-archiving; not necessarily peer reviewed Hybrid: some open access Delayed: embargo period Some Questions about OA Publishing? How much OA publishing is there at my institution? In what OA journals are my faculty publishing? In what...

  3. Accessing Fieldbus Systems via Web Services

    E-Print Network [OSTI]

    Turau, Volker

    Accessing Fieldbus Systems via Web Services Marcus Venzke1 and Stefan Pitzek2 1 Telematics -- This paper discusses accessing fieldbus systems via web services over the Internet or intranets, having validation. It rejects all accesses not conforming to the specification of the web service's interface. 1

  4. The University of Western Ontario's Accessibility Plan

    E-Print Network [OSTI]

    Lennard, William N.

    The University of Western Ontario's Accessibility Plan September 2004 to August 2005 Prepared Appendix C ­ King's University College Accessibility Plan #12;3 The University of Western Ontario's Annual Accessibility Plan September 30, 2004 Introduction In December 2001, Ontario passed the Ontarians

  5. The University of Western Ontario's Accessibility Plan

    E-Print Network [OSTI]

    Lennard, William N.

    The University of Western Ontario's Accessibility Plan September 2005 to August 2006 Prepared ........................................................................................................15 Appendix A ­ Members of WODAC Appendix B ­ The University of Western Ontario Accessibility of Western Ontario's Annual Accessibility Plan September 30, 2005 Introduction In December 2001, Ontario

  6. Building Access Program Facilities Management Bridge Group

    E-Print Network [OSTI]

    Building Access Program Facilities Management Bridge Group January 21, 2014 #12;Campus Safety Initiatives · Lighting and Landscaping · Video Surveillance · Building Access #12;The Challenge · How do we;Components of Building Access · Perimeter automation · Tightening of public hours #12;Perimeter Automation

  7. Human Resources Security Access Matrix Function Training

    E-Print Network [OSTI]

    Wu, Shin-Tson

    June 2013 Human Resources Security Access Matrix Function Training Course Required Class Mode Training Course Prerequisite Security Access Form Required Contact for Additional Information Complete Electronic I-9 Forms REC001: I-9 /E-Verify Web Training OR Online OR None Electronic I-9 Security Access Form

  8. Improved detection of rough defects for ultrasonic NDE inspections based on finite element modeling of elastic wave scattering

    SciTech Connect (OSTI)

    Pettit, J. R. [Rolls-Royce Nuclear, PO BOX 2000, Derby, UK, DE21 7XX and Research Centre for NDE, Imperial College London, Exhibition Road, London SW7 2AZ (United Kingdom); Walker, A. [Rolls-Royce Nuclear, PO BOX 2000, Derby DE21 7XX (United Kingdom); Lowe, M. J. S. [Research Centre for NDE, Imperial College London, Exhibition Road, London SW7 2AZ (United Kingdom)

    2014-02-18

    Defects which posses rough surfaces greatly affect ultrasonic wave scattering behaviour, often reducing the magnitude of reflected signals. Ultrasonic inspections rely upon this response for detecting and sizing flaws. For safety critical components reliable characterisation is crucial. Therefore, providing an accurate means to predict reductions in signal amplitude is essential. An extension of Kirchhoff theory has formed the basis for the UK power industry inspection justifications. However, it is widely recognised that these predictions are pessimistic owing to analytical approximations. A numerical full field modelling approach does not fall victim to such limitations. Here, a Finite Element model is used to aid in setting a non-conservative reporting threshold during the inspection of a large pressure vessel forging that might contain embedded rough defects. The ultrasonic response from multiple rough surfaces defined by the same statistical class is calculated for normal incident compression waves. The approach is validated by comparing coherent scattering with predictions made by Kirchhoff theory. At lower levels of roughness excellent agreement is observed, whilst higher values confirm the pessimism of Kirchhoff theory. Furthermore, the mean amplitude in the specular direction is calculated. This represents the information obtained during an inspection, indicating that reductions due to increasing roughness are significantly less than the coherent component currently being used.

  9. Video, Audio, and Animation Text Versions for Web Accessibility...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Video, Audio, and Animation Text Versions for Web Accessibility Video, Audio, and Animation Text Versions for Web Accessibility For accessibility, Section 508 requires text...

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

    E-Print Network [OSTI]

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

    2009-10-06

    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.

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

    SciTech Connect (OSTI)

    Li, Ting (Ventura, CA)

    2011-04-26

    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.

  12. The apparent roughness of a sand surface blown by wind from an analytical model of saltation

    E-Print Network [OSTI]

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

    2015-03-16

    We present an analytical model of aeolian sand transport. The model 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 derived from basic physical principles and a small number of assumptions. The model further predicts the sand transport rate (mass flux) and the impact threshold (the smallest value of the wind shear velocity at which saltation can be sustained). We show that, in contrast to previous studies, the present model's predictions are in very good agreement with a range of experiments, as well as with numerical simulations of aeolian saltation. Because of its physical basis, we anticipate that our model will find application in studies of aeolian sand transport on both Earth and Mars.

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

    DOE Patents [OSTI]

    Li, Ting

    2013-08-13

    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.

  14. Adhesion between elastic solids with randomly rough surfaces: comparison of analytical theory with molecular dynamics simulations

    E-Print Network [OSTI]

    N. Mulakaluri; B. N. J. Persson

    2011-12-22

    The adhesive contact between elastic solids with randomly rough, self affine fractal surfaces is studied by molecular dynamics (MD) simulations. The interfacial binding energy obtained from the simulations of nominally flat and curved surfaces is compared with the predictions of the contact mechanics theory by Persson. Theoretical and simulation results agree rather well, and most of the differences observed can be attributed to finite size effects and to the long-range nature of the interaction between the atoms in the block and the substrate in the MD model, as compared to the analytical theory which is for an infinite system with interfacial contact interaction. For curved surfaces (JKR-type of problem) the effective interfacial energy exhibit a weak hysteresis which may be due to the influence of local irreversible detachment processes in the vicinity of the opening crack tip during pull-off.

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

    SciTech Connect (OSTI)

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

    1995-12-01

    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.

  16. Laboratory Access | Sample Preparation Laboratories

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJesse Bergkamp Graduate student Subtask22BackgroundLabSanta'sNewNaturalAccess

  17. Detailed comparative study and a mechanistic model of resuspension of spherical particles from rough and smooth surfaces

    E-Print Network [OSTI]

    Shnapp, Ron

    2014-01-01

    Resuspension of solid particles by a tornado-like vortex from surfaces of different roughness is studied using a three-dimensional particle tracking velocimetry (3D-PTV) method. By utilizing the three-dimensional information on particle positions, velocities and accelerations before, during and after the resuspension (lift-off) event, we demonstrate that the resuspension efficiency is significantly higher from the rough surface, and propose a mechanistic model of this peculiar effect. The results indicate that for all Reynolds numbers tested, the resuspension rate, as well as particle velocities and accelerations, are higher over the rough surface, as compared to the smooth counterpart. The results and the model can help to improve modeling and analysis of resuspension rates in engineering and environmental applications.

  18. Roughness of the SiC/SiO{sub 2} vicinal interface and atomic structure of the transition layers

    SciTech Connect (OSTI)

    Liu, Peizhi; Li, Guoliang; Duscher, Gerd, E-mail: gduscher@utk.edu [Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996 (United States); Sharma, Yogesh K.; Ahyi, Ayayi C.; Isaacs-Smith, Tamara; Williams, John R.; Dhar, Sarit [Department of Physics, Auburn University, Auburn, Alabama 36849 (United States)

    2014-11-01

    The SiC/SiO{sub 2} interface is generally considered to be the cause for the reduced electron mobility of SiC power devices. Previous studies have shown a correlation between the mobility and the transition layer width at the SiC/SiO{sub 2} interface. The authors investigated this interface with atomic resolution Z-contrast imaging and electron energy-loss spectroscopy, and discovered that this transition region was due to the roughness of the vicinal interface. The roughness of a vicinal interface consisted of atomic steps and facets deviating from the ideal off-axis cut plane. The authors conclude that this roughness is limiting the mobility in the channels of SiC MOSFETs.

  19. Marine carbonate embayment system in an Eolian dune terrain, Permian Upper Minnelusa Formation, Rozet Area, Powder River Basin, Wyoming

    SciTech Connect (OSTI)

    Achauer, C.W.

    1987-05-01

    The eolian origin for Minnelusa sandstones has been stressed in numerous published articles. However, the dolomites that are interbedded with the eolian sandstones have received little attention. Isopach mapping of one of the dolomite units (Dolomite I) reflects a marine embayment system whose individual embayments range from 1/2 to 1 mi in width and trend primarily in a northwest direction. Consistently the embayment dolomites pinch out against the flanks of reworked, low relief, broad, eolian dune ridges. So far, 108 mi/sup 2/ of the Dolomite I marine embayment system have been mapped, but the overall extent of the system is undoubtedly much greater. Dolomite I is rarely cored, but cores from stratigraphically higher embayment dolomites in the upper Minnelusa show that these dolomites display the following, shoaling-upward sequence: (1) subtidal, sparingly fossiliferous dolomite; (2) intertidal, algal-laminated or brecciated or mud-cracked dolomite; and (3) very thin, supratidal, nodular anhydrite. The embayments, therefore, became the sites of marine sabkhas located between eolian dunes. Two main conclusions emerge from this study: (1) the juxtaposition of eolian sandstones and marine dolomites in a tectonically stable area suggests that eustatic sea level changes and a very arid climate were responsible for the marked environmental and lithologic changes observed in the upper Minnelusa, and (2) arid, coastal, evaporitic sabkhas bordered by eolian dunes are known from a number of modern and ancient cases, but marine carbonate embayments and associated evaporitic sabkhas that penetrate deeply into eolian sandstone terrains are rare.

  20. Evaluation of WRF predicted near hub-height winds and ramp events over a Pacific Northwest site with complex terrain

    SciTech Connect (OSTI)

    Yang, Qing; Berg, Larry K.; Pekour, Mikhail S.; Fast, Jerome D.; Newsom, Rob K.; Stoelinga, Mark; Finley, Cathy

    2013-08-16

    The WRF model version 3.3 is used to simulate near hub-height winds and power ramps utilizing three commonly used planetary boundary-layer (PBL) schemes: Mellor-Yamada-Janji? (MYJ), University of Washington (UW), and Yonsei University (YSU). The predicted winds have small mean biases compared with observations. Power ramps and step changes (changes within an hour) consistently show that the UW scheme performed better in predicting up ramps under stable conditions with higher prediction accuracy and capture rates. Both YSU and UW scheme show good performance predicting up- and down- ramps under unstable conditions with YSU being slightly better for ramp durations longer than an hour. MYJ is the most successful simulating down-ramps under stable conditions. The high wind speed and large shear associated with low-level jets are frequently associated with power ramps, and the biases in predicted low-level jet explain some of the shown differences in ramp predictions among different PBL schemes. Low-level jets were observed as low as ~200 m in altitude over the Columbia Basin Wind Energy Study (CBWES) site, located in an area of complex terrain. The shear, low-level peak wind speeds, as well as the height of maximum wind speed are not well predicted. Model simulations with 3 PBL schemes show the largest variability among them under stable conditions.

  1. Sealed head access area enclosure

    DOE Patents [OSTI]

    Golden, Martin P. (Trafford, PA); Govi, Aldo R. (Greensburg, PA)

    1978-01-01

    A liquid-metal-cooled fast breeder power reactor is provided with a sealed head access area enclosure disposed above the reactor vessel head consisting of a plurality of prefabricated structural panels including a center panel removably sealed into position with inflatable seals, and outer panels sealed into position with semipermanent sealant joints. The sealant joints are located in the joint between the edge of the panels and the reactor containment structure and include from bottom to top an inverted U-shaped strip, a lower layer of a room temperature vulcanizing material, a separator strip defining a test space therewithin, and an upper layer of a room temperature vulcanizing material. The test space is tapped by a normally plugged passage extending to the top of the enclosure for testing the seal or introducing a buffer gas thereinto.

  2. SLAC All Access: Laser Labs

    ScienceCinema (OSTI)

    Minitti, Mike; Woods Mike

    2014-06-03

    From supermarket checkouts to video game consoles, lasers are ubiquitous in our lives. Here at SLAC, high-power lasers are critical to the cutting-edge research conducted at the laboratory. But, despite what you might imagine, SLAC's research lasers bear little resemblance to the blasters and phasers of science fiction. In this edition of All Access we put on our safety goggles for a peek at what goes on inside some of SLAC's many laser labs. LCLS staff scientist Mike Minitti and SLAC laser safety officer Mike Woods detail how these lasers are used to study the behavior of subatomic particles, broaden our understanding of cosmic rays and even unlock the mysteries of photosynthesis.

  3. T-606: Sun Java System Access Manager Lets Remote Users Partially Modify Data and Remote Authenticated Users Partially Access Data

    Broader source: Energy.gov [DOE]

    Sun Java System Access Manager Lets Remote Users Partially Modify Data and Remote Authenticated Users Partially Access Data.

  4. Lattice Boltzmann simulations in microfluidics: probing the no-slip boundary condition in hydrophobic, rough, and surface nanobubble laden microchannels

    E-Print Network [OSTI]

    Jens Harting; Christian Kunert; Jari Hyväluoma

    2009-10-19

    In this contribution we review recent efforts on investigations of the effect of (apparent) boundary slip by utilizing lattice Boltzmann simulations. We demonstrate the applicability of the method to treat fundamental questions in microfluidics by investigating fluid flow in hydrophobic and rough microchannels as well as over surfaces covered by nano- or microscale gas bubbles.

  5. Interpretation of recent seismic data from a frontier hydrocarbon province: western Rough Creek graben, southern Illinois and western Kentucky

    SciTech Connect (OSTI)

    Bertagne, A.J.; Pisasale, E.T.; Leising, T.C.

    1986-05-01

    The northern basement fault of the Rough Creek graben is seismically discernible and has surface expression in the Rough Creek fault zone. The southern basement fault is not clearly defined seismically, but can be inferred from shallow faulting and gravity data. This fault is roughly coincident with the Pennyrile fault zone. Extensional faults that formed the rift boundaries were the sites of late-stage compressional and extensional tectonics. Flower structures observed along the graben boundaries probably indicate post-Pennsylvanian wrench faulting. The basement within the graben plunges north-northwest, with the lowest point occurring south of the Rough Creek fault zone. Pre-Knox sediments thicken to approximately 12,000 in this area. The Knox Megagroup thickens toward the Mississippi Embayment, ranging from 4800 ft (southeastern graben area) to more than 7000 ft (west end of graben). Upper Ordovician to Devonian units also display westward thickening. The top of the Meramecian, New Albany, Maquoketa, and the base of the Knox generate continuous, high-amplitude seismic reflections due to large impedance contrasts between clastic and carbonate units. Shallow oil and gas production (Mississippian and Pennsylvanian) is present in this area. However, deep horizons (Knox, Lower Cambrian) remain relatively untested. Potential hydrocarbon traps in the pre-Knox sequence observed on seismic include fault blocks and updip pinch-outs.

  6. Effect of edge roughness on electronic transport in graphene nanoribbon channel metal-oxide-semiconductor field-effect transistors

    E-Print Network [OSTI]

    Gilbert, Matthew

    Effect of edge roughness on electronic transport in graphene nanoribbon channel metal-oxide-semiconductor on transport in graphene nanoribbon metal-oxide-semiconductor field-effect transistors MOSFETs are reported of Physics. DOI: 10.1063/1.2839330 Graphene has recently generated considerable interest as a semiconductor

  7. High-order solutions of three-dimensional rough-surface scattering problems at high-frequencies.

    E-Print Network [OSTI]

    Turc, Catalin

    High-order solutions of three-dimensional rough-surface scattering problems at high-frequencies. II with the capability of delivering very accurate results from low to high frequencies at a cost that is independent and polarizations. Submitted to: Waves Random Media #12;High-order high-frequency scattering solutions 2 1

  8. September 15, 2003 / Vol. 28, No. 18 / OPTICS LETTERS 1665 Heat treatment for reduction of surface roughness

    E-Print Network [OSTI]

    Avrutsky, Ivan

    September 15, 2003 / Vol. 28, No. 18 / OPTICS LETTERS 1665 Heat treatment for reduction of surface postdevelopment heat treatment of the photoresist polymer used in the preparation of holographic gratings has been the postdevelopment heat treatment to reduce the surface roughness, the setup shown in Fig. 1 was used. The diffracted

  9. GEOPHYSICAL RESEARCH LETTERS, VOL. 28, NO. 5, PAGES 811-814, MARCH 1, 2001 Parameterizing Tidal Dissipation over Rough

    E-Print Network [OSTI]

    Jayne, Steven

    of barotropic tidal energy. The first line of evidence comes from observations of mix- ing in the abyssal Brazil ocean, the energy flux carried by internal waves generated over rough topog- raphy dominates the energy issues. The first is whether including a parameterization for internal wave energy-flux in a model

  10. The Access Almanac: Graduated Parking Fines

    E-Print Network [OSTI]

    Shoup, Donald

    2010-01-01

    THE ACCESS ALMANAC Graduated Parking Fines BY DONALD SHOUPC ITIES OFTEN INCREASE THEIR PARKING FINESWHEN overtime parking in a calendar year is $35, the second

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

    Broader source: Energy.gov (indexed) [DOE]

    DOE has consistently expressed its policy that international electricity trade should be subject to the same principles of comparable open access and non-discrimination that apply...

  12. UH Parking Access & Mid-Pacific Institute

    E-Print Network [OSTI]

    Pacific Ocean Science & Technology Kuykendall Annex Information Technology Center Krauss Hall Holmes HallStairs Pond UH Parking Access & Mid-Pacific Institute Exit Dole Street Offices Multipurpose

  13. Adjudicative Guidelines for Determining Eligibility for Access...

    Broader source: Energy.gov (indexed) [DOE]

    consultants, contractors, employees of contractors, licensees, certificate holders or grantees and their employees and other individuals who require access to classified...

  14. Image Formation by Incoherent and Coherent Transition Radiation from Flat and Rough Surfaces

    SciTech Connect (OSTI)

    Stupakov, Gennady; /SLAC

    2012-03-01

    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.

  15. IDC Reengineering Phase 2 & 3 Rough Order of Magnitude (ROM) Cost Estimate Summary (Leveraged NDC Case).

    SciTech Connect (OSTI)

    Harris, James M.; Prescott, Ryan; Dawson, Jericah M.; Huelskamp, Robert M.

    2014-11-01

    Sandia National Laboratories has prepared a ROM cost estimate for budgetary planning for the IDC Reengineering Phase 2 & 3 effort, based on leveraging a fully funded, Sandia executed NDC Modernization project. This report provides the ROM cost estimate and describes the methodology, assumptions, and cost model details used to create the ROM cost estimate. ROM Cost Estimate Disclaimer Contained herein is a Rough Order of Magnitude (ROM) cost estimate that has been provided to enable initial planning for this proposed project. This ROM cost estimate is submitted to facilitate informal discussions in relation to this project and is NOT intended to commit Sandia National Laboratories (Sandia) or its resources. Furthermore, as a Federally Funded Research and Development Center (FFRDC), Sandia must be compliant with the Anti-Deficiency Act and operate on a full-cost recovery basis. Therefore, while Sandia, in conjunction with the Sponsor, will use best judgment to execute work and to address the highest risks and most important issues in order to effectively manage within cost constraints, this ROM estimate and any subsequent approved cost estimates are on a 'full-cost recovery' basis. Thus, work can neither commence nor continue unless adequate funding has been accepted and certified by DOE.

  16. Design of robotic quadruped legs

    E-Print Network [OSTI]

    McKenzie, Jacob Elijah

    2012-01-01

    Prized for their performance on prepared surfaces, wheeled vehicles are often limited in mobility by rough and unstructured terrain. Conversely, systems that rely on legs have shown promising rough terrain performance but ...

  17. SDO/IRIS Data Access Hands-on Web Access to SDO Data from JSOC

    E-Print Network [OSTI]

    SDO/IRIS Data Access Hands-on Shuo Wang SWRL/NJIT March 2014 #12;Web Access to SDO Data from JSOC 2010) at: http://jsoc.stanford.edu/doc/exports/tour.pdf See my PowerPoint file titled "Web Access

  18. ACCESSIBLE TEXT ENTRY ACCESSIBLE HANDHELD AND DESKTOP TEXT ENTRY FOR PEOPLE WITH

    E-Print Network [OSTI]

    Wobbrock, Jacob O.

    a new text entry method for PDAs and mobile phones called EdgeWrite, which provides physical stabilityACCESSIBLE TEXT ENTRY ACCESSIBLE HANDHELD AND DESKTOP TEXT ENTRY FOR PEOPLE WITH MOTOR IMPAIRMENTS the EdgeWrite design to common input devices for desktop computer access, thus lowering the cost

  19. UCSB Geography Access Authorization Record Fall 2014 Geography Access Control / Identification Application

    E-Print Network [OSTI]

    California at Santa Barbara, University of

    UCSB Geography Access Authorization Record Fall 2014 Geography Access Control / Identification): Geography Use of this card is for University academic purposes only. The issued access/identification card of Geography as soon as possible. I hereby certify that the above information is true and correct, and I

  20. RESEARCH & INNOVATION OFFICE EASY ACCESS IP

    E-Print Network [OSTI]

    University of Technology, Sydney

    RESEARCH & INNOVATION OFFICE EASY ACCESS IP AN INTRODUCTION FOR INDUSTRY PARTNERS FEBRUARY 2014 #12 to provide industry with greater opportunity and incentive to develop products and services that will lead regardless of how successful the end product is You gain easy access to cutting edge science, technology

  1. Access Paths Multi-dimensional Index Structures

    E-Print Network [OSTI]

    Mannheim, Universität

    for result TID-lists) · high cost for intersection if one of the indexes deliverse many results · But') · index.find_key(`ZH1984') · Discussion: · cost equivalent to the cost of a one-dimensional access! KeyAccess Paths Multi-dimensional Index Structures 1Freitag, 4. Juni 2010 #12;September 27, 2007

  2. The University of Western Ontario's Accessibility Plan

    E-Print Network [OSTI]

    Lennard, William N.

    The University of Western Ontario's Accessibility Plan September 2008 to August 2009 Prepared ........................................................................................................15 Appendix A Members of WODAC #12;3 The University of Western Ontario's Annual Accessibility Plan September 30, 2008 Introduction In December 2001, Ontario passed the Ontarians with Disabilities Act, 2001

  3. The University of Western Ontario's Accessibility Plan

    E-Print Network [OSTI]

    Lennard, William N.

    The University of Western Ontario's Accessibility Plan September 2006 to August 2007 Prepared;3 The University of Western Ontario's Annual Accessibility Plan September 30, 2006 Introduction In December 2001, Ontario passed the Ontarians with Disabilities Act, 2001 (the "Act"). The purpose of the Act is to improve

  4. The University of Western Ontario's Accessibility Plan

    E-Print Network [OSTI]

    Lennard, William N.

    The University of Western Ontario's Accessibility Plan September 2011 to August 2012 Prepared .....................................................................................17 #12;3 Introduction In December 2001, Ontario passed the Ontarians with Disabilities Act, 2001 (the Ontario has reported on its compliance with the customer service standard under the Accessibility

  5. The University of Western Ontario's Accessibility Plan

    E-Print Network [OSTI]

    Lennard, William N.

    The University of Western Ontario's Accessibility Plan September 2007 to August 2008 Prepared ........................................................................................................12 Appendix A Members of WODAC #12;3 The University of Western Ontario's Annual Accessibility Plan September 30, 2007 Introduction In December 2001, Ontario passed the Ontarians with Disabilities Act, 2001

  6. Foreign National Access to DOE Cyber Systems

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1999-11-01

    DOE N 205.16, dated 9-15-05, extends this Notice until 9-30-06, unless sooner rescinded. To ensure foreign national access to DOE cyber systems continues to advance DOE program objectives while enforcing information access restrictions.

  7. Logic in Access Control (Tutorial Notes)

    E-Print Network [OSTI]

    Ahmed, Amal

    of California, Santa Cruz Abstract. Access control is central to security in computer systems. Over the years to a tutorial given at the 2009 International School on Foundations of Security Analysis and Design. 1 provide a simple, solid, and general foundation for access control, as well as methods for designing

  8. University Library Fact Sheet Sconul Access

    E-Print Network [OSTI]

    Brierley, Andrew

    University Library Fact Sheet Sconul Access Opening Hours Please consult the library website for our current opening hours: http://www.st-andrews.ac.uk/library/ Library Cards To borrow books and access the Library you must bring your card with you to the library on each visit. Please notify

  9. National Radiobiology Archives Distributed Access user's manual

    SciTech Connect (OSTI)

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

    1991-11-01

    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.

  10. Web Accessibility Office of Diversity and Inclusion

    E-Print Network [OSTI]

    Jones, Michelle

    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

  11. Light trapping and electrical transport in thin-film solar cells with randomly rough Piotr Kowalczewski, Angelo Bozzola, Marco Liscidini, and Lucio Claudio Andreani

    E-Print Network [OSTI]

    Light trapping and electrical transport in thin-film solar cells with randomly rough textures Piotr solar cells J. Appl. Phys. 105, 094511 (2009); 10.1063/1.3108689 Local versus global absorption in thin-film in thin-film solar cells with randomly rough textures Piotr Kowalczewski,a) Angelo Bozzola, Marco

  12. Stranski-Krastanow islanding initiated on the stochastic rough surfaces of the epitaxially strained thin films

    SciTech Connect (OSTI)

    Tarik Ogurtani, Omer; Celik, Aytac; Emre Oren, Ersin

    2014-06-14

    Quantum dots (QD) have discrete energy spectrum, which can be adjusted over a wide range by tuning composition, density, size, lattice strain, and morphology. These features make quantum dots attractive for the design and fabrication of novel electronic, magnetic and photonic devices and other functional materials used in cutting-edge applications. The formation of QD on epitaxially strained thin film surfaces, known as Stranski-Krastanow (SK) islands, has attracted great attention due to their unique electronic properties. Here, we present a systematic dynamical simulation study for the spontaneous evolution of the SK islands on the stochastically rough surfaces (nucleationless growth). During the development of SK islands through the mass accumulation at randomly selected regions of the film via surface drift-diffusion (induced by the capillary and mismatch stresses) with and/or without growth, one also observes the formation of an extremely thin wetting layer having a thickness of a few Angstroms. Above a certain threshold level of the mismatch strain and/or the size of the patch, the formation of multiple islands separated by shallow wetting layers is also observed as metastable states such as doublets even multiplets. These islands are converted into a distinct SK islands after long annealing times by coalescence through the long range surface diffusion. Extensive computer simulation studies demonstrated that after an initial transient regime, there is a strong quadratic relationship between the height of the SK singlet and the intensity of the lattice mismatch strain (in a wide range of stresses up to 8.5?GPa for germanium thin crystalline films), with the exception at those critical points where the morphological (shape change with necking) transition takes place.

  13. Effects of grit roughness and pitch oscillations on the S809 airfoil

    SciTech Connect (OSTI)

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

    1995-12-01

    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.

  14. BUILDING CONNECTION SOUTH BLOCK: ACCESS VIA MAIN ENTRANCE

    E-Print Network [OSTI]

    Shoubridge, Eric

    ENTRANCE ELEVATOR WASHROOMS BUILDING CONNECTION SOUTH BLOCK: ACCESS VIA MAIN ENTRANCE NORTH BLOCK: ACCESS VIA MAIN ENTRANCE WEST BLOCK: ALL LEVELS ARE ACCESSIBLE BY PUBLIC ELEVATOR SOUTH BLOCK MAIN ENTRANCE NORTH BLOCK: ACCESS VIA MAIN ENTRANCE WEST BLOCK: ALL LEVELS ARE ACCESSIBLE BY PUBLIC

  15. Wall-slip of highly filled powder injection molding compounds: Effect of flow channel geometry and roughness

    SciTech Connect (OSTI)

    Hausnerova, Berenika; Sanetrnik, Daniel [Dept. of Production Engineering, Faculty of Technology, Tomas Bata University in Zlin, nám. T.G. Masaryka 5555, 760 01 Zlín, Czech Republic and Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, Nad Ovc (Czech Republic); Paravanova, Gordana [Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, Nad Ovcírnou 3685, 760 01 Zlín (Czech Republic)

    2014-05-15

    The paper deals with the rheological behavior of highly filled compounds proceeded via powder injection molding (PIM) and applied in many sectors of industry (automotive, medicine, electronic or military). Online rheometer equipped with slit dies varying in surface roughness and dimensions was applied to investigate the wall-slip as a rheological phenomenon, which can be considered as a parameter indicating the separation of compound components (polymer binder and metallic powder) during high shear rates when injection molded.

  16. ETSU College of Medicine Onity Door Access Authorization Form

    E-Print Network [OSTI]

    Karsai, Istvan

    ETSU College of Medicine Onity Door Access Authorization Form Please grant access to: 6 access. ____ ALL AREAS (ETSU Service Personnel Only) Medical School Research & Training, VA Bldg. #119-Mail: johnsodl@etsu.edu #12;

  17. Policy 3507 Information Technology Accessibility 1 OLD DOMINION UNIVERSITY

    E-Print Network [OSTI]

    Policy 3507 ­ Information Technology Accessibility 1 OLD DOMINION UNIVERSITY University Policy Policy #3507 INFORMATION TECHNOLOGY ACCESSIBILITY POLICY Responsible Oversight Executive: Vice President, regardless of physical disability, will have the opportunity for appropriate access to information technology

  18. Nemesis: Preventing Authentication & Access Control Vulnerabilities in Web Applications

    E-Print Network [OSTI]

    Sabatini, David M.

    Nemesis: Preventing Authentication & Access Control Vulnerabilities in Web Applications Michael web applications. Authentication attacks occur when a web application authenticates users unsafely, granting access to web clients that lack the ap- propriate credentials. Access control attacks occur when

  19. Random access wireless networks with controlled mobility

    E-Print Network [OSTI]

    Modiano, Eytan H.

    This paper considers wireless networks where messages arriving randomly (in time and space) are collected by a mobile receiver. The messages are transmitted to the mobile receiver according to a random access scheme and ...

  20. The Access Almanac: Solar Parking Requirements

    E-Print Network [OSTI]

    Shoup, Donald

    2012-01-01

    getting solar power from our parking lots. ? A C C E S STHE ACCESS ALMANAC Solar Parking Requirements DONALD SHOUP SC E I N T H E S U N — on parking lots surrounding commercial

  1. The Access Almanac: The Parking of Nations

    E-Print Network [OSTI]

    Shoup, Donald; Stark, Seth

    2000-01-01

    THE ACCESS ALMANAC The Parking of Nations B Y D O N A L D Spaved paradise and put up a parking lot. — Joni Mitchell V E4.4 billion vehicles. Parking would be a global problem. How

  2. Metadata Value Chain for Open Access Journals 

    E-Print Network [OSTI]

    Mercer, Holly; Dyas-Correia, Sharon

    2011-01-01

    In this session, Holly Mercer presented a case for finding global solutions to improve the metadata that is available for journals, particularly small, independent open access journals. She discussed the scholarly communication lifecycle...

  3. CIVIL ENGINEERING LAB ACCESS REQUEST FORM Instructions

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    CIVIL ENGINEERING LAB ACCESS REQUEST FORM Instructions: 1) Fill out request 2) A request may Estimated Key Return Date/When does job terminate? Section C: Approval Signatures (for Civil Engineering use

  4. Fair resource allocation in multiple access channels

    E-Print Network [OSTI]

    ParandehGheibi, Ali

    2008-01-01

    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 ...

  5. The University of Western Ontario's Accessibility Plan

    E-Print Network [OSTI]

    Lennard, William N.

    The University of Western Ontario's Accessibility Plan September 2010 to August .....................................................................................15 #12;3 Introduction In December 2001, Ontario of this report, remain in force. As of March 2010, the University of Western Ontario has reported on its

  6. JOBAID-ACCESSING AND MODIFYING TALENT PROFILE

    Broader source: Energy.gov [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...

  7. Accessible Programming using Program Synthesis Rishabh Singh

    E-Print Network [OSTI]

    Accessible Programming using Program Synthesis by Rishabh Singh Bachelor of Technology (Honors Singh, MMXIV. All rights reserved. The author hereby grants to MIT permission to reproduce singh Submitted to the Department of Electrical Engineering and Computer Science in partial fulfillment

  8. Decision Analysis of Dynamic Spectrum Access Rules

    SciTech Connect (OSTI)

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

    2011-12-01

    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.

  9. Audio information access from meeting rooms. 

    E-Print Network [OSTI]

    Renals, Steve; Ellis, Dan

    2003-01-01

    We investigate approaches to accessing information from the streams of audio data that result from multi-channel recordings of meetings. The methods investigated use word-level transcriptions, and information derived ...

  10. MAPPING CLOUDS AND TERRAIN OF EARTH-LIKE PLANETS FROM PHOTOMETRIC VARIABILITY: DEMONSTRATION WITH PLANETS IN FACE-ON ORBITS

    SciTech Connect (OSTI)

    Kawahara, Hajime [Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397 (Japan); Fujii, Yuka, E-mail: kawa_h@tmu.ac.jp [Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)

    2011-10-01

    We develop an inversion technique of annual scattered light curves to sketch a two-dimensional albedo map of exoplanets in face-on orbits. As a test bed for future observations of extrasolar terrestrial planets, we apply this mapping technique to simulated light curves of a mock Earth-twin at a distance of 10 pc in a face-on circular orbit. A primary feature in recovered albedo maps traces the annual mean distribution of clouds. To extract information of other surface types, we attempt to reduce the cloud signal by taking the difference of two bands. We find that the inversion of reflectivity difference between 0.8-0.9 and 0.4-0.5 {mu}m bands roughly recovers the continental distribution, except for high latitude regions persistently covered with clouds and snow. The inversion of the reflectivity difference across the red edge (0.8-0.9 and 0.6-0.7 {mu}m) emphasizes the vegetation features near the equator. The planetary obliquity and equinox can be estimated simultaneously with the mapping under the presence of clouds. We conclude that the photometric variability of the scattered light will be a powerful means for exploring the habitat of a second Earth.

  11. Surface smoothing effect of an amorphous thin film deposited by atomic layer deposition on a surface with nano-sized roughness

    SciTech Connect (OSTI)

    Lau, W. S. Wan, X.; Xu, Y.; Wong, H.; Zhang, J.; Luo, J. K.; Institute of Renewable Energy and Environment Technology, Bolton University, Deane Road, Bolton BL3 5 AB

    2014-02-15

    Previously, Lau (one of the authors) pointed out that the deposition of an amorphous thin film by atomic layer deposition (ALD) on a substrate with nano-sized roughness probably has a surface smoothing effect. In this letter, polycrystalline zinc oxide deposited by ALD onto a smooth substrate was used as a substrate with nano-sized roughness. Atomic force microscopy (AFM) and cross-sectional transmission electron microscopy (XTEM) were used to demonstrate that an amorphous aluminum oxide thin film deposited by ALD can reduce the surface roughness of a polycrystalline zinc oxide coated substrate.

  12. Application for Permit to Construct Access Driveway Facilities...

    Open Energy Info (EERE)

    relocate an access connection to state ROWs. Published NA Year Signed or Took Effect 2000 Legal Citation Application for Permit to Construct Access Driveway Facilities on...

  13. Green Button: Providing Consumers with Access to Their Energy...

    Broader source: Energy.gov (indexed) [DOE]

    customers in California now have access to their electricity usage data through the Green Button program, and millions more will get access as the program expands. This...

  14. Thanks to Energy Department Funding, Safer Access to Offshore...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Thanks to Energy Department Funding, Safer Access to Offshore Wind Turbine Platforms is Demonstrated Thanks to Energy Department Funding, Safer Access to Offshore Wind Turbine...

  15. Acronyms A AAAP Accelerated Access Authorization Program ACREM...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    12 I IAA Interim Access Authorization ICAM Identity, Credential, and Access Management IEA Office of Independent Enterprise Assessments IG Inspector General IN Office of...

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

    Energy Savers [EERE]

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

  17. Energy Department Announces Funding to Access Higher Quality...

    Office of Environmental Management (EM)

    Energy Department Announces Funding to Access Higher Quality Wind Resources and Lower Costs Energy Department Announces Funding to Access Higher Quality Wind Resources and Lower...

  18. KuppingerCole Leadership Compass Cloud User and Access Management

    E-Print Network [OSTI]

    Chaudhuri, Surajit

    and Access Management Leaders in innovation, product features, and market reach for Cloud User and Access .............................................................................................................................................9 3. Product Rating........................................................................................................................................17 9. Product Leaders

  19. Department of Energy Data Access and Privacy Issues Related To...

    Energy Savers [EERE]

    Department of Energy Data Access and Privacy Issues Related To Smart Grid Technologies Department of Energy Data Access and Privacy Issues Related To Smart Grid Technologies This...

  20. NBP RFI: Data Access, Third Party Use, and Privacy- Comments...

    Energy Savers [EERE]

    & Publications Comments of Oncor Electric Delivery Company LLC Department of Energy Data Access and Privacy Issues Related To Smart Grid Technologies NBP RFI: Data Access,...

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

    Energy Savers [EERE]

    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...

  2. Request Access to the PARSIIe Project Management Lessons Learned...

    Energy Savers [EERE]

    Request Access to the PARSIIe Project Management Lessons Learned (PMLL) Repository Request Access to the PARSIIe Project Management Lessons Learned (PMLL) Repository PURPOSE...

  3. Increasing Community Access to Solar: Designing and Developing...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Increasing Community Access to Solar: Designing and Developing a Shared Solar Photovoltaic System (Fact Sheet), U.S. Department of Energy (DOE) Increasing Community Access to...

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

    Office of Energy Efficiency and Renewable Energy (EERE) 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...

  5. Comparison of collisions on HOV facilities with limited and continuous access

    E-Print Network [OSTI]

    Jang, Kitae; Chung, Koohong; Ragland, David R.; Chan, Ching-Yao

    2008-01-01

    in continuous access while slightly higher proportion ofcontinuous access HOV lanes, limited access HOV lanes have a higher proportion

  6. Enabling Remedyforce Accessibility v1.0 Page 1 Enabling Remedyforce Accessibility

    E-Print Network [OSTI]

    Guillas, Serge

    SERVICES DIVISION #12;Enabling Remedyforce Accessibility v1.0 Page 2 DOCUMENT HISTORY Version Amendments...................................................................................................................................11 Internet Explorer...............................................................................................................................11 Internet Explorer

  7. Experimental and Computational Study of the Effect of the System Size on Rough Surfaces Formed by Sedimenting Particles in Quasi-Two-Dimensions

    E-Print Network [OSTI]

    K. V. McCloud; U. Cardak; M. L. Kurnaz

    2004-08-22

    The roughness exponent of surfaces obtained by dispersing silica spheres into a quasi-two-dimensional cell is examined using experimental and computational methods. The cell consists of two glass plates separated by a gap, which is comparable in size to the diameter of the beads. We have studied the effect of changing the gap between the plates to a limit of about twice the diameter of the beads. If the conventional scaling analysis is performed, the roughness exponent is found to be robust against changes in the gap between the plates. The surfaces formed have two roughness exponents in two length scales, which have a crossover length about 1 cm.; however, the computational results do not show the same crossover behavior. The single exponent obtained from the simulations stays between the two roughness exponents obtained in the experiments.

  8. Access Nets: Modeling Access to Physical Robert Frohardt, Bor-Yuh Evan Chang, and Sriram Sankaranarayanan

    E-Print Network [OSTI]

    Chang, Bor-Yuh Evan

    Access Nets: Modeling Access to Physical Spaces Robert Frohardt, Bor-Yuh Evan Chang, and Sriram) Robert Frohardt, Bor-Yuh Evan Chang, and Sriram Sankaranarayanan University of Colorado, Boulder, Colorado, USA {frohardt,bec,srirams}@cs.colorado.edu Abstract. Electronic, software-managed mechanisms

  9. ETSU College of Medicine CBORD Door Access Authorization Form

    E-Print Network [OSTI]

    Karsai, Istvan

    ETSU College of Medicine CBORD Door Access Authorization Form 6/13/2011 Please grant access to: This access will remain in effect until the individual is no longer an active ETSU faculty list areas this individual will need access to: ____ ALL AREAS - ETSU Service Personnel Only ­ (i

  10. Cooperative Cache-Based Data Access in Ad Hoc Networks

    E-Print Network [OSTI]

    Yener, Aylin

    1 Cooperative Cache-Based Data Access in Ad Hoc Networks Guohong Cao, Liangzhong Yin and Chita R: Cooperative cache-based data access framework #12;6 Data Access Framework The cooperative cache-based data data authentication based on sensitivity. #12;16 Conclusion A cooperative cache-based data access

  11. Quantum internet using code division multiple access

    E-Print Network [OSTI]

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

    2013-09-12

    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.

  12. DATA ACCESS POLICY As NJIT has moved to a distributed data access environment, policy has been established

    E-Print Network [OSTI]

    DATA ACCESS POLICY As NJIT has moved to a distributed data access environment, policy has been established to protect the computer-based institutional data from unauthorized (c.q. other improprietary) access and us. Attached is a policy statement regarding data access at the New Jersey Institute

  13. AIM Access Request Access to confidential student information is protected under the Family Educational Rights and Privacy Act (FERPA), and

    E-Print Network [OSTI]

    Hart, Gus

    of the options below and provide the required information to the right. Replace an existing employee who hasAIM Access Request Access to confidential student information is protected under the Family Educational Rights and Privacy Act (FERPA), and access should only be requested when there is a need to access

  14. Supplemental Note 1. Access to datasets.................................................................pg. 5 Table S1: Accession IDs and internet URLs for access to datasets

    E-Print Network [OSTI]

    Lonardi, Stefano

    SI Guide Supplemental Note 1. Access to datasets.................................................................pg. 5 Table S1: Accession IDs and internet URLs for access to datasets Supplemental Note 2. Physical map statistics of barley HICF map S2.2 Selection of "gene-bearing" BAC clones Supplemental Note 3. Genomic

  15. Special Library Access Enrollment Form INSTRUCTIONS

    E-Print Network [OSTI]

    California at Berkeley, University of

    by the borrowing library. (National ILL code, 1980, IV.I) I accept full responsibility for compliance with USpecial Library Access Enrollment Form INSTRUCTIONS: Complete form, enclose payment, and send to: SLA Service, 133 Doe Library, University of California, Berkeley, CA 94720-6000 Minimum deposit

  16. INTERNET AND FREE ACCESS TO SCHOLARLY PUBLICATIONS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 INTERNET AND FREE ACCESS TO SCHOLARLY PUBLICATIONS Jean-Philippe Rennard Grenoble Graduate School of this evolution and presents the path toward a new economic model of scholarly publications. "If I have seen., Encyclopaedia of E-Commerce, E-Government and Mobile Commerce, IGR, 2006. Abstract: The mean price of scholarly

  17. OUTLOOK -MOBILE DEVICE ACCESS QUICK REFERENCE GUIDE

    E-Print Network [OSTI]

    Liley, David

    th OUTLOOK - MOBILE DEVICE ACCESS QUICK REFERENCE GUIDE Quick Reference Guide is designed to step you through the initial set up of your Outlook email account on your Mac. Note: If you're opening Microsoft Outlook 2011 for the first time, you will see the Welcome to Microsoft Outlook for Mac window

  18. OUTLOOK -MOBILE DEVICE ACCESS QUICK REFERENCE GUIDE

    E-Print Network [OSTI]

    Liley, David

    th OUTLOOK - MOBILE DEVICE ACCESS QUICK REFERENCE GUIDE This Quick Reference Guide is designed to step you through the setup of your Outlook email account on your mobile device. When to use this Guide is Outlook. NOTE: After you have set up your account you must remove your old GWSync account ITS

  19. Improving School Governance | 3 Open access publishing

    E-Print Network [OSTI]

    Rambaut, Andrew

    proposed. We would especially like to thank David Carr and Robert Kiley for their attention and support Access Article Processing Charges Bo-Christer Björk and David Solomon March 2014 #12;1 Developing of the Steering Group for their thoughtful feedback throughout the project. Funding group representatives: David

  20. TRANSMISSION OPEN ACCESS IN CHILE Hugh Rudnick

    E-Print Network [OSTI]

    Catholic University of Chile (Universidad Católica de Chile)

    considered or are considering deregulating their electric power sectors to allow for competition among implemented in Chilean electric power systems, the incorporation of an open access scheme, the application conditions in interconnected power systems. One line of thinking has viewed the third party use

  1. Special Access Program Policies, Responsibilities, and Procedure

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2007-10-29

    This Manual is for OFFICIAL USE ONLY and will not be distributed on the Directives Portal. For distribution, please contact the Executive Secretary of the Special Access Program Oversight Committee at 202-586-6775. Cancels DOE M 471.2-3A. Canceled by DOE O 471.5.

  2. Special Access Program Policies, Responsibilities, and Procedures

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2002-07-11

    Special Access Program Policies, Responsibilities, and Procedures This Manual is for OFFICIAL USE ONLY and will not be distributed on the Directives Portal. For distribution, please contact the Director, Office of Security, at 202-586-6775. Cancels: DOE M 471.2-3

  3. fort jackson UNIVERSITY OF SOUTH CAROLINA accessible

    E-Print Network [OSTI]

    Almor, Amit

    fort jackson UNIVERSITY OF SOUTH CAROLINA accessible dream choose convenient think form your own at the University of South Carolina Fort Jackson. Our program offers immediate benefits--convenience, flexibility can be applied to a four-year program at South Carolina and are transferable to most other colleges

  4. Information Access and Privacy Protection Office

    E-Print Network [OSTI]

    deYoung, Brad

    Information Access and Privacy Protection Office I A P P Guidelines for Using Personal Information in Email and Faxes Memorial University employees are required to protect personal information (defined personal information ­ your own or someone else's. Email and faxes, in particular, pose challenges

  5. Top Tips for Accessing Oxford's Information Resources

    E-Print Network [OSTI]

    Oxford, University of

    Top Tips for Accessing Oxford's Information Resources And How Brasenose College Library Fits In #12, electronic journals and books Top Tip 1: Attend the Bodleian induction sessions for your subject #12;Oxford ­ departmental, faculty, college Top Tip 2: Explore smaller libraries ­ www

  6. Top Tips for Accessing Oxford's Information Resources

    E-Print Network [OSTI]

    Oxford, University of

    Top Tips for Accessing Oxford's Information Resources And How Brasenose College Library Fits In #12, electronic journals and books Top Tip 1: Attend the induction session in your departmental library #12;Oxford ­ departmental, faculty, college Top Tip 2: Explore smaller libraries ­ www

  7. Open Access and the Chemical Semantic Web

    E-Print Network [OSTI]

    Murray-Rust, Peter; Rzepa, Henry S

    2004-11-21

    stream_source_info mini-abstract.html.txt stream_content_type text/plain stream_size 1868 Content-Encoding ISO-8859-1 stream_name mini-abstract.html.txt Content-Type text/plain; charset=ISO-8859-1 Open Access and the Chemical...

  8. The University of Western Ontario's Accessibility Plan

    E-Print Network [OSTI]

    Lennard, William N.

    The University of Western Ontario's Accessibility Plan September 2009 to August 2010 Prepared;3 Introduction In December 2001, Ontario passed the Ontarians with Disabilities Act, 2001 (the "Act Ontario will report on customer service standard pursuant to Ontario regulations 429/07 and 430/07 which

  9. Raphael Rom Moshe Sidi Multiple Access Protocols

    E-Print Network [OSTI]

    of networks by those who are responsible for their operation as well as by those whose task it is to design. This book concentrates on mechanisms for link access in multiaccess communication systems including local, some knowl- edge in stochastic processes and just a bit of elementary queueing systems

  10. The Pulse Protocol: Energy Efficient Infrastructure Access

    E-Print Network [OSTI]

    Awerbuch, Baruch

    The Pulse Protocol: Energy Efficient Infrastructure Access Baruch Awerbuch, David Holmer, herb}@cs.jhu.edu Abstract-- We present the Pulse protocol which is designed for multi-hop wireless. The Pulse protocol utilizes a periodic flood initiated at the network gateways which provides both routing

  11. RESEARCH Open Access Reconciling taxonomy and phylogenetic

    E-Print Network [OSTI]

    Matsen, Frederick A. "Erick"

    RESEARCH Open Access Reconciling taxonomy and phylogenetic inference: formalism and algorithms: Although taxonomy is often used informally to evaluate the results of phylogenetic inference and the root that solves a "subcoloring" problem to express the difference between a taxonomy and a phylogeny at a given

  12. Ranking websites through prioritized web accessibility barriers

    E-Print Network [OSTI]

    Brajnik, Giorgio

    of these comments apply as well to the current WCAG 2.0 draft, to Section 508 and to the Italian official technical criteria in WCAG 2.0), or when they do it (like priority levels in WCAG 1.0) they do not depend on specificRanking websites through prioritized web accessibility barriers Giorgio Brajnik Dip. di Matematica

  13. University of Bristol -Access Agreement 1. Background

    E-Print Network [OSTI]

    Wiesner, Karoline

    1 University of Bristol - Access Agreement 2013 Entry 1. Background The University developed its to the government grant package. The move to a new financial environment in 2012/13 necessitated a more fundamental degree will have to pay the full cost fees (£18,450 a year in 2012/13). #12;2 · Students who are entitled

  14. UH Parking Access & Mid-Pacific Institute

    E-Print Network [OSTI]

    Hall Keller Hall Physical Science Building Pacific Ocean Science & Technology Kuykendall AnnexStairs Pond UH Parking Access & Mid-Pacific Institute Exit M¯anoa Innovation Center and Kau Auxiliary Services Pacific Biomedical Warehouse Agricultural Science Shops Campus Security n Landscaping

  15. UH Parking Access & Mid-Pacific Institute

    E-Print Network [OSTI]

    Hall Keller Hall Physical Science Building Pacific Ocean Science & Technology Kuykendall Annex44 44 Stairs Pond UH Parking Access & Mid-Pacific Institute Exit M¯anoa Innovation Center and Kau Auxiliary Services Pacific Biomedical Warehouse Agricultural Science Shops Campus Security n Landscaping

  16. Accessibility Application Blue Badge Car Park UK

    E-Print Network [OSTI]

    Painter, Kevin

    i Accessibility Application Blue Badge Car Park UK Konstantinos Grassos H00113751 August 2012. In this project, Blue Badge Car Park (BBCP) is presented which is actually a mobile-based park finder application. It specifically focuses on finding parking spaces for wheelchair users, which are indicated by the blue badge

  17. ACCESS TO INFORMATION MANUAL NATIONAL RESEARCH FOUNDATION

    E-Print Network [OSTI]

    Jarrett, Thomas H.

    of poverty, wealth creation and knowledge generation and preservation. The NRF views the Promotion of Access an opportunity to deal with knowledge and information management in a holistic and integrated manner so, but rather an opportunity to deal with information management in a holistic and integrated manner. The NRF

  18. Speed control system for an access gate

    DOE Patents [OSTI]

    Bzorgi, Fariborz M. (Knoxville, TN)

    2012-03-20

    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.

  19. National Radiobiology Archives distributed access programmer's guide

    SciTech Connect (OSTI)

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

    1991-12-01

    The National Radiobiology Archives is a comprehensive effort to gather, organize, and catalog original data, representative specimens, and supporting materials related to significant radiobiology studies. This provides researchers with information for analyses which compare or combine results of these and other studies and with materials for analysis by advanced molecular biology techniques. This Programmer's Guide document describes the database access software, NRADEMO, and the subset loading script NRADEMO/MAINT/MAINTAIN, which comprise the National Laboratory Archives Distributed Access Package. The guide is intended for use by an experienced database management specialist. It contains information about the physical and logical organization of the software and data files. It also contains printouts of all the scripts and associated batch processing files. It is part of a suite of documents published by the National Radiobiology Archives.

  20. Experimental study of laser-oxygen cutting of low-carbon steel using fibre and CO{sub 2} lasers under conditions of minimal roughness

    SciTech Connect (OSTI)

    Golyshev, A A; Malikov, A G; Orishich, A M; Shulyatyev, V B [S.A. Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk (Russian Federation)

    2014-10-31

    The results of an experimental study of laser-oxygen cutting of low-carbon steel using fibre and CO{sub 2} lasers are generalised. The dependence of roughness of the cut surface on the cutting parameters is investigated, and the conditions under which the surface roughness is minimal are formulated. It is shown that for both types of lasers these conditions can be expressed in the same way in terms of the dimensionless variables – the Péclet number Pe and the output power Q of laser radiation per unit thickness of the cut sheet – and take the form of the similarity laws: Pe = const, Q = const. The optimal values of Pe and Q are found. We have derived empirical expressions that relate the laser power and cutting speed with the thickness of the cut sheet under the condition of minimal roughness in the case of cutting by means of radiation from fibre and CO{sub 2} lasers. (laser technologies)

  1. Low latency memory access and synchronization

    DOE Patents [OSTI]

    Blumrich, Matthias A. (Ridgefield, CT); Chen, Dong (Croton On Hudson, NY); Coteus, Paul W. (Yorktown Heights, NY); Gara, Alan G. (Mount Kisco, NY); Giampapa, Mark E. (Irvington, NY); Heidelberger, Philip (Cortlandt Manor, NY); Hoenicke, Dirk (Ossining, NY); Ohmacht, Martin (Brewster, NY); Steinmacher-Burow, Burkhard D. (Mount Kisco, NY); Takken, Todd E. (Mount Kisco, NY); Vranas, Pavlos M. (Bedford Hills, NY)

    2007-02-06

    A low latency memory system access is provided in association with a weakly-ordered multiprocessor system. Each processor in the multiprocessor shares resources, and each shared resource has an associated lock within a locking device that provides support for synchronization between the multiple processors in the multiprocessor and the orderly sharing of the resources. A processor only has permission to access a resource when it owns the lock associated with that resource, and an attempt by a processor to own a lock requires only a single load operation, rather than a traditional atomic load followed by store, such that the processor only performs a read operation and the hardware locking device performs a subsequent write operation rather than the processor. A simple prefetching for non-contiguous data structures is also disclosed. A memory line is redefined so that in addition to the normal physical memory data, every line includes a pointer that is large enough to point to any other line in the memory, wherein the pointers to determine which memory line to prefetch rather than some other predictive algorithm. This enables hardware to effectively prefetch memory access patterns that are non-contiguous, but repetitive.

  2. Low latency memory access and synchronization

    DOE Patents [OSTI]

    Blumrich, Matthias A. (Ridgefield, CT); Chen, Dong (Croton On Hudson, NY); Coteus, Paul W. (Yorktown Heights, NY); Gara, Alan G. (Mount Kisco, NY); Giampapa, Mark E. (Irvington, NY); Heidelberger, Philip (Cortlandt Manor, NY); Hoenicke, Dirk (Ossining, NY); Ohmacht, Martin (Brewster, NY); Steinmacher-Burow, Burkhard D. (Mount Kisco, NY); Takken, Todd E. (Mount Kisco, NY), Vranas; Pavlos M. (Bedford Hills, NY)

    2010-10-19

    A low latency memory system access is provided in association with a weakly-ordered multiprocessor system. Bach processor in the multiprocessor shares resources, and each shared resource has an associated lock within a locking device that provides support for synchronization between the multiple processors in the multiprocessor and the orderly sharing of the resources. A processor only has permission to access a resource when it owns the lock associated with that resource, and an attempt by a processor to own a lock requires only a single load operation, rather than a traditional atomic load followed by store, such that the processor only performs a read operation and the hardware locking device performs a subsequent write operation rather than the processor. A simple prefetching for non-contiguous data structures is also disclosed. A memory line is redefined so that in addition to the normal physical memory data, every line includes a pointer that is large enough to point to any other line in the memory, wherein the pointers to determine which memory line to prefetch rather than some other predictive algorithm. This enables hardware to effectively prefetch memory access patterns that are non-contiguous, but repetitive.

  3. Auctions to gas transmission access : the British experience

    E-Print Network [OSTI]

    McDaniel, Tanga

    2002-01-01

    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. ...

  4. Phase II Smart Grid Data Access Funding Opportunity Winner Announced...

    Office of Environmental Management (EM)

    Phase II Smart Grid Data Access Funding Opportunity Winner Announced Phase II Smart Grid Data Access Funding Opportunity Winner Announced January 8, 2014 - 12:00am Addthis The...

  5. Sensing-based Opportunistic Channel Access Department of Computer Science

    E-Print Network [OSTI]

    Liu, Xin

    and adapt to appropriate frequency, power, and transmission schemes. They can opportunistically access initiatives and advanced radio technology, more flexible opportunistic spectrum access has great potential initiatives towards flexible and dynamic spectrum policies, including regulation recommendations [7

  6. BUILDING CONNECTION ACCESS VIA ENTRANCE NEAR ROUNDABOUT AND ENTRANCE FACING

    E-Print Network [OSTI]

    Shoubridge, Eric

    1ST FLOOR ENTRANCE ELEVATOR WASHROOMS BUILDING CONNECTION ACCESS VIA ENTRANCE NEAR ROUNDABOUT AND 7TH FLOOR CONNECT WITH MCINTYRE MEDICAL BUILDING LIFE SCIENCES COMPLEX 3649 PROMENADE SIR WASHROOM #12;ENTRANCE ELEVATOR WASHROOMS BUILDING CONNECTION ACCESS VIA ENTRANCE NEAR ROUNDABOUT

  7. CHANGE IN ACCEPTABLE ID DOCUMENTS FOR JLAB ACCESS:

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    JLAB ACCESS: The REAL ID Act (Public Law 109-13) now determines which state driver's license can be presented and accepted as a valid ID document for access to Jefferson Lab. The...

  8. Peering, Transit, Interconnection: Internet Access in Central Europe

    E-Print Network [OSTI]

    McGarty, Terrence P.

    2002-07-22

    This paper presents a review of the alternatives for Internet access in Central Europe and the evolution of the

  9. LOCH: Planning for Open Access in REF - Discussion Points 

    E-Print Network [OSTI]

    Tate, Dominic; Aucock, Janet

    2015-03-19

    Slides and checklist from facilitated discussion session from ARMA Open Access Good Practice event (London 19-03-2015).

  10. Industrial engineering study of tank farm access qualifications and validations

    SciTech Connect (OSTI)

    Sterling, S.G., Westinghouse Hanford

    1996-07-01

    Engineering study of alternatives to reduce costs of validation worker`s qualification prior to Tank Farm area access.

  11. A Utility Regulator's Guide to Data Access for Commercial Building...

    Broader source: Energy.gov (indexed) [DOE]

    benchmarking. A Utility Regulator's Guide to Data Access for Commercial Building Energy Performance Benchmarking More Documents & Publications Better Buildings Challenge...

  12. Building Access Policy Responsible Administrative Unit: Finance & Administration

    E-Print Network [OSTI]

    Access Manager: Web-based software that Building Proctors will use to grant or deny electronic building

  13. IBM Human Ability and Accessibility Center Executive brief

    E-Print Network [OSTI]

    to making products and services accessible, to its commitment to research, IBM has been an industry leader graduated from New York's Pace University with a Master's degree in computer science. A skilled and highlyIBM Human Ability and Accessibility Center Executive brief Accessibility at IBM: An integrated

  14. Abstract of thesis Separating Instruction Fetches from Memory Accesses : ILAR

    E-Print Network [OSTI]

    Dietz, Henry G. "Hank"

    Abstract of thesis Separating Instruction Fetches from Memory Accesses : ILAR (Instruction Line access performance. This thesis investigates applying the same ideas to improve instruction access. ILAR instruction. This thesis proposes an instruction set architecture for ILAR, investigates a mechanism to load

  15. CARPOOL: Extending Free Internet Access over DTN in Urban Environments

    E-Print Network [OSTI]

    Tsaoussidis, Vassilis

    - tolerant access to the Internet for everyone, and (iii) has energy- efficient design that delegates allCARPOOL: Extending Free Internet Access over DTN in Urban Environments Ioannis Komnios and Vassilis-tolerant Internet access to all. Targeting an urban scenario, where means of public transport, such as buses

  16. Time Series Photometry Data: Standard Access, Standard Formats

    E-Print Network [OSTI]

    Holl, András

    Time Series Photometry Data: Standard Access, Standard Formats Andr#19; as Holl Konkoly Observatory a discussion on data access and #12;le format aspects of photometry. Introduction Presently there is time series photometry data available in public databases, but the access to these varies from one collection

  17. Optimal Multiple Assignments with (,)-Scheme for General Access Structures

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Optimal Multiple Assignments with (,)-Scheme for General Access Structures Qiang Li, Xiangxue Li to construct an optimal multiple assignment with threshold schemes for general access structure. In this paper the values of either 0 or 1. We also show that given a complete access structure, an optimal scheme may

  18. Harvard Open Access Project Good Practices For University

    E-Print Network [OSTI]

    Chen, Yiling

    Talking about a policy 66 Revising this guide 67 Additional resources 71 (Endnotes) #12;Good Practices Practices for University Open-Access Policies Preface This is a guide to good practices for university open2013-09-30 Harvard Open Access Project Good Practices For University Open-Access Policies Edited

  19. Dynamic Query Optimization under Access Limitations and Dependencies

    E-Print Network [OSTI]

    Calvanese, Diego

    : Unlike relational tables in a database, data sources on the Web typically can only be accessed in limited ways. In particular, some of the source fields may be required as input and thus need to be mandatorily filled in order to access the source. Answering queries over sources with access limitations is a complex

  20. SECURITY FOR ENTERPRISE TELEWORK AND REMOTE ACCESS Karen Scarfone, Editor

    E-Print Network [OSTI]

    device and a remote access server, often a virtual private network (VPN) gateway. The tunnel uses based on their high-level architectures: tunneling, portals, remote desktop access, and direct application access. Tunneling involves establishing a secure communications tunnel between a telework client

  1. University of Calgary Human Resources Accessing HR Manager Reports

    E-Print Network [OSTI]

    Calgary, University of

    University of Calgary ­ Human Resources Accessing HR Manager Reports For those who are Reports to Managers (i.e. those who have employees reporting to them), use this guide to access Manager Reports, which provide information on those employees within your reporting structure. Note: Access to Manager Reports

  2. Solvent Accessibility of the Thrombin-thrombomodulin Interface

    E-Print Network [OSTI]

    Komives, Elizabeth A.

    Solvent Accessibility of the Thrombin- thrombomodulin Interface Jeffrey G. Mandell1 , Abel Baerga Characterization RIKEN 2-1 Hirosawa, Wako, Saitama 351-01, Japan The kinetics of solvent accessibility exchange due to solvent accessibility at the interface from H/2 H exchange due to complex dissociation

  3. Open Access Data in Polar and Cryospheric Remote Sensing

    E-Print Network [OSTI]

    Pope, Allen; Rees, W. Gareth; Fox, Adrian J.; Fleming, Andrew

    2014-07-01

    , access, sharing and use. Keywords: polar; Arctic; Antarctic; cryosphere; glaciers; permafrost; snow; sea ice; data; open access; multispectral; SAR; passive microwave; airphot; scatterometry; DEMs; software OPEN ACCESS Remote Sens. 2014, 6 6184 1... equivalent, ocean circulation, tree line migration, permafrost lake dynamics, circumpolar environmental impact assessment or penguin populations, recent research has clearly demonstrated the increasing importance of Earth observation. Nevertheless, many...

  4. Access Control for Home Data Sharing: Attitudes, Needs and Practices

    E-Print Network [OSTI]

    Bauer, Lujo

    these findings and present a set of associated guidelines for designing usable access- control systems- tal models of access control and security are often misaligned with current systems. We detail organizations have system administrators to set up and maintain access-control policies, but home users typ

  5. Access Point Selection for Improving Throughput Fairness in Wireless LANs

    E-Print Network [OSTI]

    Siris, Vasilios A.

    Access Point Selection for Improving Throughput Fairness in Wireless LANs Vasilios A. Siris investigate the problem of access point selection in wireless LANs based on the IEEE 802.11 standard, when solely at the wireless stations, which passively monitor the activity of each access point's channel

  6. Invited Viewer Invited Viewer iSIS Portal Access

    E-Print Network [OSTI]

    Dennett, Daniel

    1 Invited Viewer Invited Viewer iSIS Portal Access Tufts "Invited Viewers" such as parents and spouses can be granted view-only access to a student's iSIS secure personal information. Students previously registered by another student or you do not have a Tufts Username and active iSIS access (most

  7. Financing medicine's last mile in Uganda : exploring linkages between patient access to medicine and supply chain access to finance

    E-Print Network [OSTI]

    Dokmo, Charles Alexander

    2015-01-01

    Pharmaceutical companies operating in Africa are well positioned to contribute to the United Nations' ongoing efforts to improve access to medicine in Africa. This thesis explores how access to finance for businesses in ...

  8. Last Name First Name Ext. Access E-mail Last Name First Name Ext. Remote Access E-mail

    E-Print Network [OSTI]

    Columbia University

    Last Name First Name Ext. Remote Access E-mail Last Name First Name Ext. Remote Access E-mail Adamo-781-7186 jsquires Ghani Saleh 8979 sghani Strom David 8938 dstrom Gitelman Yitzhak 8943 ygitelma Sydor Elisabeth

  9. Accessibility Resources for Western Resources specified below are intended to supplement those listed in the Accessible Service and

    E-Print Network [OSTI]

    Lennard, William N.

    the provision of accessible text for students who are blind or have low vision. FM System Head Sets Head sets

  10. A KNOWLEDGE BASED SYSTEM FOR PROVIDING INTELLIGENT ACCESS TO A PETROLEUM USER DATABASE

    E-Print Network [OSTI]

    Rosenberg, Steven

    2011-01-01

    INTELLIGENT ACCESS TO A PETROLEUM USER DATABASE StevenINTELLIGENT ACCESS TO A PETROLEUM USER DATABASE StevenINTELLIGENT ACCESS TO A PETROLEUM USER DATABASE Steven

  11. Guidelines for Internet Access to Journals This information provides publishers' Guidelines for Institutional Subscribers regarding Internet Access to Uni-

    E-Print Network [OSTI]

    Sprott, Julien Clinton

    Guidelines for Internet Access to Journals This information provides publishers' Guidelines for Institutional Subscribers regarding Internet Access to Uni- versity of Wisconsin Press Journal content. · INTERNET ACCESS is defined as the viewing and use of subscribed Journal content online via the World Wide

  12. Parental Internet Access Consent Form Student: By signing below, I understand that access to the University of Nevada,

    E-Print Network [OSTI]

    Parental Internet Access Consent Form Student: By signing below, I understand that access or Guardian: I grant permission for my child to be allowed access to the Internet through facilities of the Internet's interconnected systems to which the University connects and does not warrant the accuracy

  13. Improving Access to Foundational Energy Performance Data

    SciTech Connect (OSTI)

    Studer, D.; Livingood, W.; Torcellini, P.

    2014-08-01

    Access to foundational energy performance data is key to improving the efficiency of the built environment. However, stakeholders often lack access to what they perceive as credible energy performance data. Therefore, even if a stakeholder determines that a product would increase efficiency, they often have difficulty convincing their management to move forward. Even when credible data do exist, such data are not always sufficient to support detailed energy performance analyses, or the development of robust business cases. One reason for this is that the data parameters that are provided are generally based on the respective industry norms. Thus, for mature industries with extensive testing standards, the data made available are often quite detailed. But for emerging technologies, or for industries with less well-developed testing standards, available data are generally insufficient to support robust analysis. However, even for mature technologies, there is no guarantee that the data being supplied are the same data needed to accurately evaluate a product?s energy performance. To address these challenges, the U.S. Department of Energy funded development of a free, publically accessible Web-based portal, the Technology Performance Exchange(TM), to facilitate the transparent identification, storage, and sharing of foundational energy performance data. The Technology Performance Exchange identifies the intrinsic, technology-specific parameters necessary for a user to perform a credible energy analysis and includes a robust database to store these data. End users can leverage stored data to evaluate the site-specific performance of various technologies, support financial analyses with greater confidence, and make better informed procurement decisions.

  14. WYDOT Access Manual | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-EnhancingEt Al.,Turin,Village of Wellington,FL97-11 SEPAStorageWWTP PowerAccess Manual

  15. Open Access: From Myth to Paradox

    SciTech Connect (OSTI)

    Ginsparg, Paul (Cornell University) [Cornell University

    2009-05-06

    True open access to scientific publications not only gives readers the possibility to read articles without paying subscription, but also makes the material available for automated ingestion and harvesting by 3rd parties. Once articles and associated data become universally treatable as computable objects, openly available to 3rd party aggregators and value-added services, what new services can we expect, and how will they change the way that researchers interact with their scholarly communications infrastructure? I will discuss straightforward applications of existing ideas and services, including citation analysis, collaborative filtering, external database linkages, interoperability, and other forms of automated markup, and speculate on the sociology of the next generation of users.

  16. Open Access: From Myth to Paradox

    ScienceCinema (OSTI)

    Ginsparg, Paul [Cornell University, Ithaca, New York, United States

    2010-01-08

    True open access to scientific publications not only gives readers the possibility to read articles without paying subscription, but also makes the material available for automated ingestion and harvesting by 3rd parties. Once articles and associated data become universally treatable as computable objects, openly available to 3rd party aggregators and value-added services, what new services can we expect, and how will they change the way that researchers interact with their scholarly communications infrastructure? I will discuss straightforward applications of existing ideas and services, including citation analysis, collaborative filtering, external database linkages, interoperability, and other forms of automated markup, and speculate on the sociology of the next generation of users.

  17. Access Your Files | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsicloudden Documentation DataStreamsTotalproposalsAboutAcceleratingthYour Files Access

  18. UF Access List | Stanford Synchrotron Radiation Lightsource

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired SolarAbout /Two ElectrondiesellonglonggasolineU.S. 9,StudentUF Access

  19. Access Solar Energy LLC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAand DaltonSolar Energy LLC Jump to: navigation, search Name: Access Solar

  20. Accessing the Laboratory | The Ames Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory of raregovAboutRecovery Act Recovery ActARMAccelerators,Access

  1. Accounts & Access | Argonne Leadership Computing Facility

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory of raregovAboutRecovery Act Recovery ActARMAccelerators,Access Account

  2. User Access Program | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking With WIPPfinalUnexpectedofWyko NT33004.DepartmentUsedUser Access

  3. Access to OUO | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12 Beta-3AUDIT REPORT: OAS-L-13-11Program:AcceleratingOUO Access to

  4. Access to UCNI | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12 Beta-3AUDIT REPORT: OAS-L-13-11Program:AcceleratingOUO AccessUCNI

  5. REMOTE ACCESS SERVICES | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data CenterFinancialInvesting inServices »AboutEnergyPublicREMOTE ACCESS

  6. COMPARISON OF SEA SURFACE ROUGHNESS MODELS FOR OFFSHORE WIND POWER UTILISATION Bernhard Lange(1), Jrgen Hjstrup(2), Sren Larsen(2), Rebecca Barthelmie(2)

    E-Print Network [OSTI]

    Heinemann, Detlev

    COMPARISON OF SEA SURFACE ROUGHNESS MODELS FOR OFFSHORE WIND POWER UTILISATION Bernhard Lange(1 Large offshore wind farms are being built in several countries in Europe. The economic viability of such projects depends on the favourable wind conditions of offshore sites, since the higher energy yield has

  7. 44 IEEE TRANSACTIONS ON ELECTRONICS PACKAGING MANUFACTURING, VOL. 24, NO. 1, JANUARY 2001 Rough Set Theory: A Data Mining Tool for

    E-Print Network [OSTI]

    Kusiak, Andrew

    Theory: A Data Mining Tool for Semiconductor Manufacturing Andrew Kusiak, Member, IEEE Abstract of data. Data mining has emerged as a discipline that contributes tools for data analysis, discovery and other aspects of data mining are introduced. The rough set theory offers a viable approach

  8. Suppression of thermal conductivity in graphene nanoribbons with rough edges Alexander V. Savin,1,2 Yuri S. Kivshar,2 and Bambi Hu3,4

    E-Print Network [OSTI]

    , Moscow 119991, Russia 2Nonlinear Physics Center, Research School of Physics and Engineering, Australian, the thermal properties of graphene are also of both fundamental and practical im- portance. SeveralSuppression of thermal conductivity in graphene nanoribbons with rough edges Alexander V. Savin,1

  9. Managed Access by Controlled Sensing (MACS)

    SciTech Connect (OSTI)

    Curtiss, J.A.; Indusi, J.P.

    1994-08-01

    During chemical weapons challenge inspections, the CWC treaty allows ``alternate means`` of access to be proposed by the nation challenged. BNL`s Safeguards, Safety and Nonproliferation Division is funded by the Defense Nuclear Agency to develop a system to provide the challenge inspection team with a ``virtual presence`` within the facility while denying personal access. A general purpose configuration of a mobile station manned by site personnel and a base station manned by the challenge inspector, supported by a flexible communication system, will allow facility personnel to tailor the basic model to their site. Design of the MACS system is based on maximum use of commercial equipment that is available on the international market. Design requirements for the MACS system include methods of establishing geographical position, distance measuring equipment for use in verifying dimensions on floor plans, video and two-way audio links between the mobile unit and the base station, and portability and versatility of the equipment. The MACS platform will also support deployment of selected instrumentation which the site may offer to the challenge inspection team. This paper describes the design and construction of the prototype MACS system.

  10. Review of the margins for ASME code fatigue design curve - effects of surface roughness and material variability.

    SciTech Connect (OSTI)

    Chopra, O. K.; Shack, W. J.; Energy Technology

    2003-10-03

    The ASME Boiler and Pressure Vessel Code provides rules for the construction of nuclear power plant components. The Code specifies fatigue design curves for structural materials. However, the effects of light water reactor (LWR) coolant environments are not explicitly addressed by the Code design curves. Existing fatigue strain-vs.-life ({var_epsilon}-N) data illustrate potentially significant effects of LWR coolant environments on the fatigue resistance of pressure vessel and piping steels. This report provides an overview of the existing fatigue {var_epsilon}-N data for carbon and low-alloy steels and wrought and cast austenitic SSs to define the effects of key material, loading, and environmental parameters on the fatigue lives of the steels. Experimental data are presented on the effects of surface roughness on the fatigue life of these steels in air and LWR environments. Statistical models are presented for estimating the fatigue {var_epsilon}-N curves as a function of the material, loading, and environmental parameters. Two methods for incorporating environmental effects into the ASME Code fatigue evaluations are discussed. Data available in the literature have been reviewed to evaluate the conservatism in the existing ASME Code fatigue evaluations. A critical review of the margins for ASME Code fatigue design curves is presented.

  11. Delivery, Management and Access Model for E-prints and Open Access Journals

    E-Print Network [OSTI]

    Southampton, University of

    selection criteria 26 5.2.2 Responsibility for long term preservation 27 #12;5.2.2.1 Open access journals 27 of Information Science, Loughborough University and Information & Library Services, Cranfield University] Authors University, Loughborough, Leicestershire, LE11 3TU, and Information & Library Services, Cranfield University

  12. Mandatory Access Control With discretionary access control (DAC) policies, authorization to perform op-

    E-Print Network [OSTI]

    Schneider, Fred B.

    security TS (Top Secret) exceptionally grave S (Secret) serious C (Confidential) some U (Unclassified) none;164 Chapter 8. Mandatory Access Control ing people to keep secret what they read. A person could see a document D only if (i) there was reason to trust that person would not divulge the secrets in D and (ii

  13. Open Access Authorization for Thesis or Dissertation The University of South Carolina is committed to digital open access of information. Open access allows

    E-Print Network [OSTI]

    Almor, Amit

    Open Access Authorization for Thesis or Dissertation The University of South Carolina is committed a paywall limits access to public records. Our electronic repository allows the University of South Carolina signature below indicates that I understand the University of South Carolina commitment to digital open

  14. Controlling rough paths

    E-Print Network [OSTI]

    2013-03-05

    and observe that all the terms are in OCd. 2?I; V. #2. ? so that QAZ d. 2?I; V. #2. ? is in the domain of L; then. jjLQjjd;I p. 1. 2d ? 2. ½jjRZjjZ;I jjWjjg;I jjZ0jjN;I jjXjjg;I ...

  15. Remote direct memory access over datagrams

    DOE Patents [OSTI]

    Grant, Ryan Eric; Rashti, Mohammad Javad; Balaji, Pavan; Afsahi, Ahmad

    2014-12-02

    A communication stack for providing remote direct memory access (RDMA) over a datagram network is disclosed. The communication stack has a user level interface configured to accept datagram related input and communicate with an RDMA enabled network interface card (NIC) via an NIC driver. The communication stack also has an RDMA protocol layer configured to supply one or more data transfer primitives for the datagram related input of the user level. The communication stack further has a direct data placement (DDP) layer configured to transfer the datagram related input from a user storage to a transport layer based on the one or more data transfer primitives by way of a lower layer protocol (LLP) over the datagram network.

  16. Direct memory access transfer completion notification

    DOE Patents [OSTI]

    Chen, Dong (Croton on Hudson, NY); Giampapa, Mark E. (Irvington, NY); Heidelberger, Philip (Cortlandt Manor, NY); Kumar, Sameer (White Plains, NY); Parker, Jeffrey J. (Rochester, MN); Steinmacher-Burow, Burkhard D. (Esslingen, DE); Vranas, Pavlos (Danville, CA)

    2010-07-27

    Methods, compute nodes, and computer program products are provided for direct memory access (`DMA`) transfer completion notification. Embodiments include determining, by an origin DMA engine on an origin compute node, whether a data descriptor for an application message to be sent to a target compute node is currently in an injection first-in-first-out (`FIFO`) buffer in dependence upon a sequence number previously associated with the data descriptor, the total number of descriptors currently in the injection FIFO buffer, and the current sequence number for the newest data descriptor stored in the injection FIFO buffer; and notifying a processor core on the origin DMA engine that the message has been sent if the data descriptor for the message is not currently in the injection FIFO buffer.

  17. The Access Almanac: Ending the Abuse of Disabled Parking Placards

    E-Print Network [OSTI]

    Shoup, Donald

    2011-01-01

    Ending the Abuse of Disabled Parking Placards DONALD SHOUP Aattention for repeatedly parking illegally in spaceshandicappedfraud.org. Making curb parking accessible to

  18. Automatic Learning of Block Storage Access Time Models

    E-Print Network [OSTI]

    Crume, Adam

    2015-01-01

    3 Storage devices 3.1 Scope ofedge-on . . . . . . . . Queueing in a storage device with noAUTOMATIC LEARNING OF BLOCK STORAGE ACCESS TIME MODELS A

  19. Proposed Open Access Requirement for International Electric Transmissi...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Open Access Requirement for International Electric Transmission Facilities and Delegation to the Federal Energy Regulatory Commission: Federal Register Notice Volume 64, No. 143 -...

  20. T-701: Citrix Access Gateway Enterprise Edition Input Validation...

    Broader source: Energy.gov (indexed) [DOE]

    ABSTRACT: Citrix Access Gateway Enterprise Edition Input Validation Flaw in Logon Portal Permits Cross-Site Scripting Attacks. reference LINKS: SecurityTracker Alert ID:...

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

    Energy Savers [EERE]

    Data Access Honeywell Responses To Request for Information (RFI) from the Department of Energy on Implementing the National Broadband Plan by Empowering Consumers and the Smart...

  2. V-106: Citrix Access Gateway Unspecified Security Bypass Vulnerability

    Broader source: Energy.gov [DOE]

    A vulnerability has been reported in Citrix Access Gateway, which can be exploited by malicious people to bypass certain security restrictions.

  3. Reducing rural poverty through increased access to energy services...

    Open Energy Info (EERE)

    Reducing rural poverty through increased access to energy services: a review of the multifunctional platform project in Mali Jump to: navigation, search Tool Summary LAUNCH TOOL...

  4. Power Africa's Beyond the Grid Increasing Access through Small...

    Broader source: Energy.gov (indexed) [DOE]

    the U.S. Government is formally launching an innovative framework under President Obama's Power Africa initiative to increase energy access for underserved populations across...

  5. Accessing Low-Cost Capital Through Securitization (Poster)

    SciTech Connect (OSTI)

    Mendelsohn, M.

    2014-10-01

    Poster for Solar Power International conference presents information on NREL's effort to open capital markets through securitization via Solar Access to Public Capital (SAPC) working group's efforts.

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

    Broader source: Energy.gov (indexed) [DOE]

    Microsoft Internet Explorer Object Access Bug Lets Remote Users Execute Arbitrary Code PLATFORM: Internet Explorer 8 ABSTRACT: A vulnerability was reported in Microsoft Internet...

  7. Idaho - Access Management: Standards and Procedures for Highway...

    Open Energy Info (EERE)

    - Access Management: Standards and Procedures for Highway Right-of-Way Encroachments Jump to: navigation, search OpenEI Reference LibraryAdd to library PermittingRegulatory...

  8. Updated May 2012 MILITARY ACCESSIONS VITAL TO NATIONAL INTEREST (MAVNI)

    E-Print Network [OSTI]

    Arnold, Jonathan

    Updated May 2012 MILITARY ACCESSIONS VITAL TO NATIONAL INTEREST (MAVNI) RECRUITMENT PILOT are considered to be vital to the national interest. Those holding critical skills ­ physicians, nurses

  9. U-211: EMC Celerra/VNX/VNXe Access Control Bug Lets Remote Authenticated Users Access Files/Directories

    Broader source: Energy.gov [DOE]

    A vulnerability was reported in EMC Celerra/VNX/VNXe. A remote authenticated user can access files and directories on the target file system.

  10. Iterative Water-filling for Gaussian Vector Multiple Access Channels

    E-Print Network [OSTI]

    Li, Tiffany Jing

    Iterative Water-filling for Gaussian Vector Multiple Access Channels W. Yu, W. Rhee, S. Boyd, and J. Cioffi Zhenlei Shen Lehigh University March 29, 2005 Zhenlei Shen (Lehigh) Iterative Water-filling for Gaussian Vector Multiple Access ChannelsMarch 29, 2005 1 / 13 #12;1 Quick Review 2 Iterative Water

  11. Announced Dynamic Access Probability protocol for next generation wireless networks

    E-Print Network [OSTI]

    Levy, Hanoch

    Announced Dynamic Access Probability protocol for next generation wireless networks Z. NAOR #3; H probability. Keywords: wireless networks, multiple access, MAC #3; naorz@post.tau.ac.il y hanoch@cs.tau.ac.il 1 #12; 1 Introduction Wireless networks are rapidly expanding. Future satellite-based networks

  12. Negotiating Multichannel Sensing and Access In Cognitive Radio Wireless Networks

    E-Print Network [OSTI]

    Islam, M. Saif

    Negotiating Multichannel Sensing and Access In Cognitive Radio Wireless Networks Hua Liu§, Bhaskar the coordination among secondary users on channel sensing strategy in cognitive wireless networks. In this problem and potentially access in a cognitive radio network? If users may have a potentially different valuation of each

  13. Towards an Accessible Web through Semantic Web Standards

    E-Print Network [OSTI]

    Watt, Stephen M.

    1 Towards an Accessible Web through Semantic Web Standards Clare M. So, Mark Perry and Stephen M Abstract-- Making information on the Web accessible to all people, including to those having special needs than actual semantic content that is rendered by alternative technologies. To make the Web more

  14. A Framework for Flexible Access Control in Digital Library Systems

    E-Print Network [OSTI]

    Ray, Indrajit

    A Framework for Flexible Access Control in Digital Library Systems Indrajit Ray and Sudip. Traditional access control models are often found to be inadequate for digital libraries. This is because the user population for digital libraries is very dynamic and not completely known in advance. In addition

  15. The Energy Harvesting Multiple Access Channel with Energy Storage Losses

    E-Print Network [OSTI]

    Yener, Aylin

    The Energy Harvesting Multiple Access Channel with Energy Storage Losses Kaya Tutuncuoglu and Aylin considers a Gaussian multiple access channel with two energy harvesting transmitters with lossy energy storage. The power allocation policy maximizing the average weighted sum rate given the energy harvesting

  16. OSU-Tulsa Helmerich Research Center Card Access Request Form

    E-Print Network [OSTI]

    Veiga, Pedro Manuel Barbosa

    OSU-Tulsa Helmerich Research Center Card Access Request Form *Please submit form to the University that it will NOT be loaned or transferred to any person. If this access card is lost or stolen, OSU-Tulsa University Police: ________________________ OSU-Tulsa University Police 2/4/13 University Police use only Date: _____________ Processed by

  17. Test Access Mechanism Optimization, Test Scheduling, and Tester Data Volume

    E-Print Network [OSTI]

    Chakrabarty, Krishnendu

    Test Access Mechanism Optimization, Test Scheduling, and Tester Data Volume Reduction for System Marinissen, Senior Member, IEEE Abstract--We describe an integrated framework for system-on-chip (SOC) test automation. Our framework is based on a new test access mechanism (TAM) architecture consisting of flexible

  18. Towards an Accessible Web through Semantic Web Standards

    E-Print Network [OSTI]

    Perry, Mark

    Towards an Accessible Web through Semantic Web Standards Clare M. So, Mark Perry and Stephen M Abstract-- Making information on the Web accessible to all people, including to those having special needs than actual semantic content that is rendered by alternative technologies. To make the Web more

  19. ISSN:2155-6199 The International Open Access

    E-Print Network [OSTI]

    Brown, Sally

    ISSN:2155-6199 The International Open Access Journal of Bioremediation & Biodegradation Special, S7 http://dx.doi.org/10.4172/2155-6199.S7-001 Research Article Open Access Bioremediation.S. Environmental Protection Agency sampling survey of 945 groundwater-based drinking water supplies [3

  20. Utility-Optimal Random Access for Wireless Multimedia Networks

    E-Print Network [OSTI]

    Wong, Vincent

    Utility-Optimal Random Access for Wireless Multimedia Networks Man Hon Cheung, Hamed Mohsenian-of-service (QoS) requirements, we model their utilities with concave, step, and quasi-concave functions. We to the users for random access, based on solving a non-convex network utility maximization problem. We propose

  1. Medium Access Control with Physical Layer Assisted Loss Differentiation

    E-Print Network [OSTI]

    Xu, Zhengyuan "Daniel"

    (BEB) algorithm used in IEEE 802.11 DCF suffers from the unfairness problem and yields low throughput (BEB) algorithm. DCF uses two techniques: the default basic access mechanism and the request/CTS access scheme is widely used. Our work mainly focuses on the RTS/CTS mechanism in DCF. However, the BEB

  2. JLab Registration/International Services - Identification/Access...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Access Badge Badge Office hours: Monday - Thursday: 9:00am - 11:00am 2:00pm - 4:00pm Friday: 9:00am - 11:00am 2:00pm - 3:00pm CHANGE IN ACCEPTABLE ID DOCUMENTS FOR JLAB ACCESS The...

  3. European Geosciences Union Open Access Publications of the

    E-Print Network [OSTI]

    Demouchy, Sylvie

    European Geosciences Union Open Access Publications of the European Geosciences Union (EGU Director 1988-2007 #12;European Geosciences Union Mission Statement for Publications "Dedicated to the pursuit of excellence and free and universal accessibility of scientific publications in all areas

  4. A Smart Energy System with Distributed Access Control

    E-Print Network [OSTI]

    Shinozuka, Masanobu

    A Smart Energy System with Distributed Access Control Cheng-Ting Lee, Cheng-Hsun Yang, Chun.chou}@gmail.com Abstract--This paper presents a new smart energy (SE) system with distributed access control. Many other SE with minimal power, latency, and cost overhead. I. INTRODUCTION Smart energy (SE) systems have been one

  5. Statler College Research Data Center Access and Usage Policy

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    Statler College Research Data Center Access and Usage Policy Objective Access to the Statler College Research Data Center (RDC) will be restricted to protect Statler computer and server operations they are in the data center. The RDC is monitored by cameras at all times and all activities in the data center shall

  6. Cooperative Decentralized Resource Allocation in Heterogeneous Wireless Access Medium

    E-Print Network [OSTI]

    Zhuang, Weihua

    1 Cooperative Decentralized Resource Allocation in Heterogeneous Wireless Access Medium Muhammad--In this paper, radio resource allocation in a hetero- geneous wireless access medium is investigated. Mobile the performance tradeoffs of the proposed algorithm. Index Terms--Heterogeneous wireless networks, resource allo

  7. Java Libraries for Accessing the Princeton Wordnet: Comparison and Evaluation

    E-Print Network [OSTI]

    direct access to the Princeton Wordnet data, so as to help Java developers find the library 1 See Table 6- cess the information in the original Prince- ton Wordnet databases. From this compari- son emerges-coverage, easiest-to-use library available. A Java developer seeking to access the Prince- ton Wordnet is faced

  8. Structure for common access and support of fuel cell stacks

    DOE Patents [OSTI]

    Walsh, Michael M. (Fairfield, CT)

    2000-01-01

    A structure provides common support and access to multiple fuel cells externally mounted thereto. The structure has openings leading to passages defined therein for providing the access. Various other fuel cell power system components are connected at the openings, such as reactant and coolant sources.

  9. Ontology-Based Data Access: From Theory to Practice

    E-Print Network [OSTI]

    Calvanese, Diego

    Ontology-Based Data Access: From Theory to Practice Diego Calvanese KRDB Research Centre-DBMS architecture: Data Source Application Data Source Data Source Application Application Ideal architecture based on a DBMS: Application DBMS Application Application Diego Calvanese (FUB) Ontology-Based Data Access: From

  10. PICTURE NAMING AND LEXICAL ACCESS IN ITALIAN CHILDREN AND ADULTS

    E-Print Network [OSTI]

    PICTURE NAMING AND LEXICAL ACCESS IN ITALIAN CHILDREN AND ADULTS Simonetta D'Amico University, 00185 Roma (damicosi@tin.it). #12;2 PICTURE NAMING AND LEXICAL ACCESS IN ITALIAN CHILDREN AND ADULTS) and 50 Italian-speaking adults in a timed picture-naming task, with 250 pictures (simple line drawings

  11. Access Control Policy Misconfiguration Detection in Online Social Yousra Javed

    E-Print Network [OSTI]

    Shehab, Mohamed

    and actual privacy settings causes access control misconfigurations, raising the risk of unintentional we scan the Facebook user's access control policies. We implemented a prototype Facebook ap show that the users' intended policies were significantly different than their actual policies. Our

  12. UNBC LIBRARY CARD AND BORROWER ACCESS APPLICATION FORM

    E-Print Network [OSTI]

    Northern British Columbia, University of

    UNBC LIBRARY CARD AND BORROWER ACCESS APPLICATION FORM For Faculty Authorized Users UNBC FACULTY: 20020_________________ Please issue a Faculty Authorized Library card to the following person so that s/he may borrow Library materials and access services in my name for my UNBC academic use. Please extend

  13. Towards Universal Accessibility of ETDs: Building the NDLTD Union Archive

    E-Print Network [OSTI]

    Suleman, Hussein

    Towards Universal Accessibility of ETDs: Building the NDLTD Union Archive Hussein Suleman to newcomers the existence of a collection of accessible ETDs. While many current members do indeed have such collections at the level of institutions or consortia, there is no single mechanism to aggregate all ETDs

  14. Regulating Wireless Access Pricing Kwanfong Leung and Jianwei Huang

    E-Print Network [OSTI]

    Huang, Jianwei

    user prices change with network's market shares and bandwidth costs. When such direct control change with the network costs and market shares. · Social optimal access pricing: We showRegulating Wireless Access Pricing Kwanfong Leung and Jianwei Huang Department of Information

  15. Access Nets: Modeling Access to Physical Spaces Robert Frohardt, Bor-Yuh Evan Chang, and Sriram Sankaranarayanan

    E-Print Network [OSTI]

    Chang, Bor-Yuh Evan

    Access Nets: Modeling Access to Physical Spaces Robert Frohardt, Bor-Yuh Evan Chang, and Sriram Sankaranarayanan University of Colorado, Boulder, Colorado, USA {frohardt,bec,srirams}@cs.colorado.edu Abstract Frohardt, Bor-Yuh Evan Chang, and Sriram Sankaranarayanan Lobby Archive Gallery visitor guard curator

  16. 61CanCer InformatICs 2014:13(s5) Open Access: Full open access to

    E-Print Network [OSTI]

    Geman, Donald

    61CanCer InformatICs 2014:13(s5) Open Access: Full open access to this and thousands of other papers at http://www.la-press.com. Cancer Informatics Supplementary Issue: Network and Pathway Analysis of Cancer Susceptibility (A) Introduction Cellular signaling generates a chain of protein

  17. Efficient Memory Access with NumPy Global Arrays using Local Memory Access

    SciTech Connect (OSTI)

    Daily, Jeffrey A.; Berghofer, Dan C.

    2013-08-03

    This paper discusses the work completed working with Global Arrays of data on distributed multi-computer systems and improving their performance. The tasks completed were done at Pacific Northwest National Laboratory in the Science Undergrad Laboratory Internship program in the summer of 2013 for the Data Intensive Computing Group in the Fundamental and Computational Sciences DIrectorate. This work was done on the Global Arrays Toolkit developed by this group. This toolkit is an interface for programmers to more easily create arrays of data on networks of computers. This is useful because scientific computation is often done on large amounts of data sometimes so large that individual computers cannot hold all of it. This data is held in array form and can best be processed on supercomputers which often consist of a network of individual computers doing their computation in parallel. One major challenge for this sort of programming is that operations on arrays on multiple computers is very complex and an interface is needed so that these arrays seem like they are on a single computer. This is what global arrays does. The work done here is to use more efficient operations on that data that requires less copying of data to be completed. This saves a lot of time because copying data on many different computers is time intensive. The way this challenge was solved is when data to be operated on with binary operations are on the same computer, they are not copied when they are accessed. When they are on separate computers, only one set is copied when accessed. This saves time because of less copying done although more data access operations were done.

  18. New Terrain for Rural Politics

    E-Print Network [OSTI]

    Fox, Jonathan A

    1992-01-01

    sobrevivir en Santa Maria. Democracia social en un sindicato5. Maruja Barrig, "Democracia Emergente y Movimiento dein Movimientos Sociales y Democracia: Lafundacidnde un nuevo

  19. DISCLAIMER

    Broader source: Energy.gov (indexed) [DOE]

    the pollutants away from their source and by turbulent air motion that results from solar heating of the earth's surface and air movement over rough terrain and surfaces....

  20. Microsoft Word - Class 1 S Access Road-031611 FINAL.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    site using the South Access Road. The South Access Road has been upgraded using the same criteria and design standards as the North Access Road and New Mexico Department of...

  1. A Model of Accessibility Services Provision for Students with Disabilities in Higher Education

    E-Print Network [OSTI]

    Kouroupetroglou, Georgios

    23 A Model of Accessibility Services Provision for Students with Disabilities in Higher Education, Accessibility Service, Universal Learning Design, Tertiary Education, Assistive Technologies, Accessibility, Educational Facilities Abstract The number of universities offering services for students with disabilities

  2. FINGERPRINTING AND CRIMINAL HISTORY RECORD CHECK, For Unescorted Access to

    E-Print Network [OSTI]

    Su, Xiao

    FINGERPRINTING AND CRIMINAL HISTORY RECORD CHECK, For Unescorted Access to Radioactive Material of the law and prudent practices, conduct fingerprinting criminal history record checks on current employees an employee's or prospective employee's criminal history and fingerprinting record must be balanced

  3. Transpiring purging access probe for particulate laden or hazardous environments

    DOE Patents [OSTI]

    VanOsdol, John G

    2013-12-03

    An access probe for remote-sensing access through a viewing port, viewing volume, and access port into a vessel. The physical boundary around the viewing volume is partially formed by a porous sleeve lying between the viewing volume and a fluid conduit. In a first mode of operation, a fluid supplied to the fluid conduit encounters the porous sleeve and flows through the porous material to maintain the viewing volume free of ash or other matter. When additional fluid force is needed to clear the viewing volume, the pressure of the fluid flow is increased sufficiently to slidably translate the porous sleeve, greatly increasing the flow into the viewing volume. The porous sleeve is returned to position by an actuating spring. The access probe thereby provides for alternate modes of operation based on the pressure of an actuating fluid.

  4. City of Kansas City- Solar Easements and Geothermal Access

    Broader source: Energy.gov [DOE]

    Owners of accessory solar energy systems are responsible for negotiating with other property owners for any desired solar easements to protect access to sunlight. An easements must be recorded in...

  5. Packing efficiency and accessible surface area of crumpled graphene

    E-Print Network [OSTI]

    Cranford, Steven Wayne

    Graphene holds promise as an ultracapacitor due to its high specific surface area and intrinsic capacitance. To exploit both, a maximum surface area must be accessible while the two-dimensional (2D) graphene is deformed ...

  6. MICHIGAN TECHNOLOGICAL UNIVERSITY REQUEST FOR BANNER ACCESS -HUMAN RESOURCES

    E-Print Network [OSTI]

    Employee/HRIS Payroll Training Reports Employee General Inquiry Employee Directory Student Directory Employee Information Payroll (earnings and deductions) Position Management/Classification Banner Access ­ Update AAO Training Benefit Information Bargaining Unit Departmental Time Entry Employee Information

  7. Electrifying the bottom of the pyramid : improving access in slums

    E-Print Network [OSTI]

    Scott, Cecilia (Cecilia Lauren)

    2010-01-01

    Slums are expanding in Latin America, Asia, and Africa, and as a result, the lack of safe, reliable electricity access in these regions is expanding. Addressing this issue will require a comprehensive strategy that caters ...

  8. Control of Substrate Access to the Active Site and Catalytic...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Control of Substrate Access to the Active Site and Catalytic Mechanism of Methane and Toluene Monooxygenases Friday, June 22, 2012 - 3:30pm SSRL Main Conference Room 137-322 Prof....

  9. Open Access Policies and Practices for Increasing Scholarly Contributions

    E-Print Network [OSTI]

    Willinsky, John

    2009-03-26

    John Willinsky, Professor of Education at Stanford University, presents "Open Access Policies and Practices for Increasing Scholarly Contributions," February 19, 2009 at the University of Kansas. Presentation sponsored by ...

  10. Hybrid Access Control Mechanism in Two-Tier Femtocell Networks 

    E-Print Network [OSTI]

    Mantravadi, Sirisha 1987-

    2012-08-21

    , enables users to overcome the interference in the system and satisfy their minimum QoS requirements. The optimal allocation of femtocell resources is incorporated into the access control algorithm through a constrained sum-rate maximization to protect...

  11. Engineering a campus-wide accessible music library

    E-Print Network [OSTI]

    Winstein, Keith J

    2005-01-01

    The Library Access to Music Project has created a new kind of music library at the Massachusetts Institute of Technology. The library is always open and available in dormitory rooms and classrooms, because it transmits ...

  12. Successful Restoration of Arteriovenous Dialysis Access Patency after Late Intervention

    E-Print Network [OSTI]

    El-Damanawi, Ragada; Kershew, Stephanie; Campbell, Gary; Hiemstra, Thomas F.

    2014-11-16

    -intensity warfarin is ineffective for the prevention of PTFE graft failure in patients on hemodialysis: a randomized controlled trial. J Am Soc Nephrol 2002; 13: 2331–2337. Table 1: Baseline Patient and Access Characteristics PATIENTS n 38 Male (%) 21...

  13. Accessibility of Computer Science: A Reflection for Faculty Members

    E-Print Network [OSTI]

    O'Leary, Dianne P.

    Accessibility of Computer Science: A Reflection for Faculty Members Dianne P. O'Leary http O'Leary. Copyright Dianne P. O'Leary, 1999 Version 1: June 1999 1 Picture Yourself: You are male

  14. Pedestrian Only Area University visitors' car parks (limited access)

    E-Print Network [OSTI]

    Wirosoetisno, Djoko

    Campus Map Pedestrian Only Area Car Parks University visitors' car parks (limited access) Other university car parks Public multi-storey car park Lawns Free City Bus Stop ST. GEORGE'S FIELD WOODHOUSE LAN E

  15. Does anyone have access to 2012 average residential rates by...

    Open Energy Info (EERE)

    Does anyone have access to 2012 average residential rates by utility company? I'm seeing an inconsistency between the OpenEI website and EIA 861 data set. Home > Groups > Utility...

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

    Broader source: Energy.gov (indexed) [DOE]

    EMC Smarts Network Configuration Manager Java RMI Access Control Flaw Lets Remote Users Gain Full Control PLATFORM: Version(s): prior to 9.2 ABSTRACT: Two vulnerabilities were...

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

    Broader source: Energy.gov (indexed) [DOE]

    A vulnerability was reported in Cisco Secure Access Control System. A remote user can change the passwords of arbitrary users. PLATFORM: Cisco Secure ACS versions 5.1 patch 3, 4,...

  18. Ergodic Secret Alignment for the Fading Multiple Access Wiretap Channel

    E-Print Network [OSTI]

    Ulukus, Sennur

    Ergodic Secret Alignment for the Fading Multiple Access Wiretap Channel Raef Bassily Sennur Ulukus a technique (on top of Gaussian signaling) that uses the power of a non-transmitting node in jamming

  19. Accessing and Viewing NETL Solicitations/Funding Opportunity...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Accessing NETL SolicitationsFunding Opportunity Announcements in FedConnect In the Internet Explorer browser, enter the FedConnect URL www.FedConnect.net On the Main Page, click...

  20. Recommendations concerning energy information model documentation, public access, and evaluation

    E-Print Network [OSTI]

    Wood, David O.

    1979-01-01

    In this study we provide an analysis of the factors underlying Congressional concern regarding model documentation, policies for public access, and evaluation procedures of the Energy Information Administration (EIA) and ...

  1. SOFTWARE Open Access RNAexinv: An extended inverse RNA folding from

    E-Print Network [OSTI]

    Barash, Danny

    SOFTWARE Open Access RNAexinv: An extended inverse RNA folding from shape and physical attributes problem that aims to predict the secondary structure of a given RNA sequence. Software packages are nowa

  2. Variations on the Gaussian Multiple-Access Channel Alfonso Martinez

    E-Print Network [OSTI]

    energy channel (AE-Q). The alternative models we study are non-coherent, in the sense that information channel, including a multiple-access sce- nario, was studied by Verd´u [1]. We establish a correspondence

  3. Wideband Channel Sounding Techniques for Dynamic Spectrum Access Networks

    E-Print Network [OSTI]

    Chen, Qi

    2009-01-01

    large bandwidth with minimal interference. It is based on the STDCC channel sounder and Multicarrier Direct Sequence Code Division Multiple Access (MC-DS-CDMA) technique. The STDCC technique, defined by Parsons [2], was first employed by Cox...

  4. NMDOT Application for Permit to Construct an Access or Median...

    Open Energy Info (EERE)

    NMDOT Application for Permit to Construct an Access or Median Opening on Public Right of Way Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document-...

  5. Securing Remote Access Inside Wireless Mesh Networks (Full Version)

    E-Print Network [OSTI]

    Manulis, Mark

    home network while remaining transparent to the routing infrastructure. In WMNs this transparency can and round-optimal remote network access protocol in which inter- mediate mesh routers are considered

  6. A System for Open-Access 3 He Human Lung

    E-Print Network [OSTI]

    Walsworth, Ronald L.

    A System for Open-Access 3 He Human Lung Imaging at Very Low Field I.C. RUSET,1 L.L. TSAI,2,3 R describe a prototype system built to allow open-access very-low-field MRI of human lungs using laser images of human lungs. We include discussion on challenges unique to imaging at 50­200 kHz, including

  7. Non-Utility Generation and Transmission Access in Texas 

    E-Print Network [OSTI]

    Panjavan, S.; Adib, P.

    1993-01-01

    . The lack of transmission access clearly restricted IPPs' ability to compete in the power supply market. In the Energy Policy Act of 1992, the first impediment was eliminated by amending the PUHCA to allow IPPs to operate facilities without coming...-UTILITY GENERATION AND TRANSMISSION ACCESS IN TEXAS' Sarut Panjavan Senior Power Systems Engineer Public Utility Commission ofTexas Austin, Texas ABSTRACT Power from non-utility generators (NUG) is an important part of the generation mix in Texas...

  8. Description and Access in Rare Books Cataloging: A Historical Survey

    E-Print Network [OSTI]

    Whittaker, Beth M.

    2003-01-01

    larger library catalog. Also, the development of specialized thesauri for providing con-trolled vocabulary access to terms outside the broader realm of sources such as Library of Congress subject headings allowed the application of these thesaurus terms... larger library catalog. Also, the development of specialized thesauri for providing con-trolled vocabulary access to terms outside the broader realm of sources such as Library of Congress subject headings allowed the application of these thesaurus terms...

  9. UNIVERSIT DE MONTRAL SECURE ACCESS CONTROL ARCHITECTURES FOR MULTI-TENANCY CLOUD

    E-Print Network [OSTI]

    Meunier, Michel

    ! UNIVERSITÉ DE MONTRÉAL SECURE ACCESS CONTROL ARCHITECTURES FOR MULTI-TENANCY CLOUD ENVIRONMENTS mémoire intitulé: SECURE ACCESS CONTROL ARCHITECTURES FOR MULTI-TENANCY CLOUD ENVIRONMENTS présenté par

  10. Fulfilling the promise of the personal computer : the development of accessible computer technologies, 1970-1998

    E-Print Network [OSTI]

    Petrick, Elizabeth

    2012-01-01

    of Disability Rights and Accessible Computer Technologies…of Disability Rights and Accessible Computer Technologiesof Disability Rights………..…… 2.2 Computer Technology and

  11. Kinetic Accessibility of Buried DNA Sites in Nucleosomes

    E-Print Network [OSTI]

    Wolfram Mobius; Richard A. Neher; Ulrich Gerland

    2007-08-21

    Using a theoretical model for spontaneous partial DNA unwrapping from histones, we study the transient exposure of protein-binding DNA sites within nucleosomes. We focus on the functional dependence of the rates for site exposure and reburial on the site position, which is measurable experimentally and pertinent to gene regulation. We find the dependence to be roughly described by a random walker model. Close inspection reveals a surprising physical effect of flexibility-assisted barrier crossing, which we characterize within a toy model, the "semiflexible Brownian rotor."

  12. Scalable Database Access Technologies for ATLAS Distributed Computing

    E-Print Network [OSTI]

    A. Vaniachine; for the ATLAS Collaboration

    2009-10-02

    ATLAS event data processing requires access to non-event data (detector conditions, calibrations, etc.) stored in relational databases. The database-resident data are crucial for the event data reconstruction processing steps and often required for user analysis. A main focus of ATLAS database operations is on the worldwide distribution of the Conditions DB data, which are necessary for every ATLAS data processing job. Since Conditions DB access is critical for operations with real data, we have developed the system where a different technology can be used as a redundant backup. Redundant database operations infrastructure fully satisfies the requirements of ATLAS reprocessing, which has been proven on a scale of one billion database queries during two reprocessing campaigns of 0.5 PB of single-beam and cosmics data on the Grid. To collect experience and provide input for a best choice of technologies, several promising options for efficient database access in user analysis were evaluated successfully. We present ATLAS experience with scalable database access technologies and describe our approach for prevention of database access bottlenecks in a Grid computing environment.

  13. Establishing a Secure Data Center with Remote Access: Preprint

    SciTech Connect (OSTI)

    Gonder, J.; Burton, E.; Murakami, E.

    2012-04-01

    Access to existing travel data is critical for many analysis efforts that lack the time or resources to support detailed data collection. High-resolution data sets provide particular value, but also present a challenge for preserving the anonymity of the original survey participants. To address this dilemma of providing data access while preserving privacy, the National Renewable Energy Laboratory and the U.S. Department of Transportation have launched the Transportation Secure Data Center (TSDC). TSDC data sets include those from regional travel surveys and studies that increasingly use global positioning system devices. Data provided by different collecting agencies varies with respect to formatting, elements included and level of processing conducted in support of the original purpose. The TSDC relies on a number of geospatial and other analysis tools to ensure data quality and to generate useful information outputs. TSDC users can access the processed data in two different ways. The first is by downloading summary results and second-by-second vehicle speed profiles (with latitude/longitude information removed) from a publicly-accessible website. The second method involves applying for a remote connection account to a controlled-access environment where spatial analysis can be conducted, but raw data cannot be removed.

  14. ISIS 9.0 | Student Center Access to Parent Center 1 Revised: 10.3.13

    E-Print Network [OSTI]

    Capogna, Luca

    ISIS 9.0 | Student Center ­ Access to Parent Center 1 Revised: 10.3.13 Student Center ­ Access to Parent Center ISIS 9.0 Authorization to Access Your Student Account The Parent/Family Authorization student academic and financial information start by accessing your ISIS Student Center and selecting

  15. Using Outlook Web Access Last Updated: September 2, 2010 Page 1 of 4

    E-Print Network [OSTI]

    Zhou, Chongwu

    Using Outlook Web Access Last Updated: September 2, 2010 Page 1 of 4 Outlook Web Access is another additional software. Most of what could be accessed from an installation of Microsoft Outlook could will lengthen the period of activity before the session is logged off. Selecting Outlook Web Access Light if you

  16. Opportunities for Process Monitoring Techniques at Delayed Access Facilities

    SciTech Connect (OSTI)

    Curtis, Michael M.; Gitau, Ernest TN; Johnson, Shirley J.; Schanfein, Mark; Toomey, Christopher

    2013-09-20

    Except for specific cases where the International Atomic Energy Agency (IAEA) maintains a continuous presence at a facility (such as the Japanese Rokkasho Reprocessing Plant), there is always a period of time or delay between the moment a State is notified or aware of an upcoming inspection, and the time the inspector actually enters the material balance area or facility. Termed by the authors as “delayed access,” this period of time between inspection notice and inspector entrance to a facility poses a concern. Delayed access also has the potential to reduce the effectiveness of measures applied as part of the Safeguards Approach for a facility (such as short-notice inspections). This report investigates the feasibility of using process monitoring to address safeguards challenges posed by delayed access at a subset of facility types.

  17. Any Data, Any Time, Anywhere: Global Data Access for Science

    E-Print Network [OSTI]

    Bloom, Kenneth; Bockelman, Brian; Bradley, Daniel; Dasu, Sridhara; Dost, Jeff; Fanzago, Federica; Sfiligoi, Igor; Tadel, Alja Mrak; Tadel, Matevz; Vuosalo, Carl; Würthwein, Frank; Yagil, Avi; Zvada, Marian

    2015-01-01

    Data access is key to science driven by distributed high-throughput computing (DHTC), an essential technology for many major research projects such as High Energy Physics (HEP) experiments. However, achieving efficient data access becomes quite difficult when many independent storage sites are involved because users are burdened with learning the intricacies of accessing each system and keeping careful track of data location. We present an alternate approach: the Any Data, Any Time, Anywhere infrastructure. Combining several existing software products, AAA presents a global, unified view of storage systems - a "data federation," a global filesystem for software delivery, and a workflow management system. We present how one HEP experiment, the Compact Muon Solenoid (CMS), is utilizing the AAA infrastructure and some simple performance metrics.

  18. Any Data, Any Time, Anywhere: Global Data Access for Science

    E-Print Network [OSTI]

    Kenneth Bloom; Tommaso Boccali; Brian Bockelman; Daniel Bradley; Sridhara Dasu; Jeff Dost; Federica Fanzago; Igor Sfiligoi; Alja Mrak Tadel; Matevz Tadel; Carl Vuosalo; Frank Würthwein; Avi Yagil; Marian Zvada

    2015-08-06

    Data access is key to science driven by distributed high-throughput computing (DHTC), an essential technology for many major research projects such as High Energy Physics (HEP) experiments. However, achieving efficient data access becomes quite difficult when many independent storage sites are involved because users are burdened with learning the intricacies of accessing each system and keeping careful track of data location. We present an alternate approach: the Any Data, Any Time, Anywhere infrastructure. Combining several existing software products, AAA presents a global, unified view of storage systems - a "data federation," a global filesystem for software delivery, and a workflow management system. We present how one HEP experiment, the Compact Muon Solenoid (CMS), is utilizing the AAA infrastructure and some simple performance metrics.

  19. Subscriber access provided by -Access paid by the | UC Riverside Libraries Analytical Chemistry is published by the American Chemical Society. 1155

    E-Print Network [OSTI]

    Chen, Wilfred

    Subscriber access provided by - Access paid by the | UC Riverside Libraries Analytical Chemistry) chem- istries were compared. EDC was established to be the most effective chemistry and was used

  20. Equal Access Initiative HIV/AIDS Information Resources from NLM

    SciTech Connect (OSTI)

    Templin-Branner W. and N. Dancy

    2010-09-11

    The Equal Access Initiative: HIV/AIDS Information Resources from the National Library of Medicine training is designed specifically for the National Minority AIDS Council 2010 Equal Access Initiative (EAI) Computer Grants Program awardees to provide valuable health information resources from the National Library of Medicine and other reliable sources to increase awareness of the wealth of treatment information and educational materials that are available on the Internet and to improve prevention and treatment education for their clients. These resources will also meet the needs of community-based

  1. Quantum Random Access Codes using Single $d$-level Systems

    E-Print Network [OSTI]

    Armin Tavakoli; Alley Hameedi; Breno Marques; Mohamed Bourennane

    2015-04-30

    Random access codes (RACs) are used by a party to despite limited communication access an arbitrary subset of information held by another party. Quantum resources are known to enable RACs that break classical limitations. Here, we study quantum and classical RACs with high-level communication. We derive average performances of classical RACs and present families of high-level quantum RACs. Our results show that high-level quantum systems can significantly increase the advantage of quantum RACs over the classical counterparts. We demonstrate our findings in an experimental realization of a quantum RAC with four-level communication.

  2. 6 Scalable End-user Access to Big Data 1 6.1 The Data Access Problem of Big Data . . . . . . . . . . . . . . . . . . . . . 2

    E-Print Network [OSTI]

    Calvanese, Diego

    Contents 6 Scalable End-user Access to Big Data 1 6.1 The Data Access Problem of Big Data;Chapter 6 Scalable End-user Access to Big Data Martin Giese,1 Diego Calvanese,2 Peter Haase,3 Ian Horrocks-users typically face when dealing with Big Data: · They need to pose ad hoc queries to a collection of data

  3. Software Requests Mann Library Public Access Computing Mann Library's public access computing (PAC) environment deploys a suite of software that is available at

    E-Print Network [OSTI]

    Angenent, Lars T.

    Software Requests ­ Mann Library Public Access Computing Mann Library's public access computing for requesting Mann Library public access computing software is: Sara E. Wright, 254-6218, sew268@cornell.edu #12; to academic and research-related resources, by all patrons of the Library. Software for instruction

  4. METHODOLOGY Open Access Modular assembly of designer PUF proteins for

    E-Print Network [OSTI]

    Zhao, Huimin

    METHODOLOGY Open Access Modular assembly of designer PUF proteins for specific post of the PUF domain assembly method for RBP engineering, we fused the PUF domain to a post and applied biology and medicine. Keywords: Protein engineering, RNA-binding protein, Post

  5. Publication Agreement Addendum Columbia University Open Access Policy & Scholarly Uses

    E-Print Network [OSTI]

    Salzman, Daniel

    Publication Agreement Addendum Columbia University Open Access Policy & Scholarly Uses This Amendment is made a part of the publication agreement between the Publisher and the Author named below: ___________________________________________________________________ ___________________________________________________________________ To the extent there is any conflict between this Amendment and the publication agreement, this Amendment

  6. Ergonomic accessibility standards D. W. Fourney, J. A. Carter

    E-Print Network [OSTI]

    Carter, Jim

    Ergonomic accessibility standards D. W. Fourney, J. A. Carter a a Department of Computer Science to be used in calls-for-proposal for personal computer systems [1]. The Human Factors and Ergonomics Society committee submitted their work to date to ISO committee TC159/SC4/WG5 Software Ergonomics and Human Computer

  7. Accessing Heritage Documents according to Space Criteria within Digital Libraries

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Accessing Heritage Documents according to Space Criteria within Digital Libraries Christophe, Geographic Information Retrieval and Visualization, Non-Structured Documents, Digital Libraries, Cultural on digital libraries and proposes to extend the basic services of existing Library Management System with new

  8. PREFACE Open Access Energy and energy policy: chemistry's role

    E-Print Network [OSTI]

    Berry, R. Stephen

    PREFACE Open Access Energy and energy policy: chemistry's role Steve Berry This supplement. Published: 23 April 2012 doi:10.1186/1752-153X-6-S1-I1 Cite this article as: Berry: Energy and energy policy plays a key role, even if it is not the only key contributing subject. Obviously energy is very much

  9. Diesel: Applying Privilege Separation to Database Access Adrienne Porter Felt

    E-Print Network [OSTI]

    Wagner, David

    Diesel: Applying Privilege Separation to Database Access Adrienne Porter Felt UC Berkeley apf reviewers. We construct a system called Diesel, which implements data sep- aration by intercepting database queries and applying mod- ules' restrictions to the queries. We evaluate Diesel on three widely

  10. RESEARCH ARTICLE Open Access The dynamic architecture of the metabolic

    E-Print Network [OSTI]

    Breitling, Rainer

    RESEARCH ARTICLE Open Access The dynamic architecture of the metabolic switch in Streptomyces during this switch, using a specifically designed Affymetrix genechip and a high-resolution time and regula- tion of the "metabolic switch" continue to emerge as we begin to apply postgenomic technology

  11. CASE REPORT Open Access Gut microeukaryotes during anorexia nervosa

    E-Print Network [OSTI]

    Boyer, Edmond

    CASE REPORT Open Access Gut microeukaryotes during anorexia nervosa: a case report Nina Gouba1-old Caucasian woman was admitted in an intensive care unit for severe malnutrition in anorexia nervosa. One health. Keywords: Anorexia nervosa, Gut, Microeukaryotes, Polymerase chain reaction, Culture Background

  12. Some Randomly Accessed Memories From my Days at the ISI

    E-Print Network [OSTI]

    Jammalamadaka, S. Rao

    Some Randomly Accessed Memories From my Days at the ISI Sreenivasa Rao Jammalamadaka (J.S. Rao that would trump engineering. Along with my uncle who came to drop me off at the ISI, we entered the RTS at the ISI in those days, Professor only meant PCM and perhaps JBS because he didn't have a formal doctorate

  13. Introduction Access to sanitation services in Ethiopia is currently

    E-Print Network [OSTI]

    Introduction Access to sanitation services in Ethiopia is currently reported at 43% (WaterAid, 2010 coverage in the Amhara Region increased from 4% in 2004 (OLoughlin et al., 2006) to 63% in 2010 (Water construction and excavation of waste disposal pits by going house to house. In addition, some implementers

  14. Circuit-Switched Memory Access in Photonic Interconnection Networks for

    E-Print Network [OSTI]

    Bergman, Keren

    streaming access to memory, and very stringent energy constraints [12], [46], [50]. While commodity general characteristics that will impede per- formance scaling and energy efficiency for applications that require large lower frequencies, currently up to 1600 MT/s with the most recent DDR3 implementation [32]. Recent

  15. REVIEW Open Access Endogenous retroviruses and multiple sclerosis

    E-Print Network [OSTI]

    Schierup, Mikkel Heide

    REVIEW Open Access Endogenous retroviruses and multiple sclerosis­ new pieces to the puzzle Kari K a role in multiple sclerosis (MS) has long been considered; accumulating findings suggest this to be most alternative ways to challenge autoimmune diseases. Keywords: Multiple sclerosis, Endogenous retroviruses, HERV

  16. A Comparative Test of Web Accessibility Evaluation Methods

    E-Print Network [OSTI]

    Brajnik, Giorgio

    for usability evaluation methods is likely to re- peat for accessibility: that there is uncertainty about, teams involved in qual- ity assessment, developers) could: 1) optimize resources ex- pended in assessing different levels of qual- ity, require different levels of resources, and differ for their applicability

  17. A Transmission Control Scheme for Media Access in Sensor Networks

    E-Print Network [OSTI]

    Han, Richard Y.

    around tens of bytes. Multi-path interference and short, irregular transmission range result, the underlying media access con- trol (MAC) and transmission control protocols are critical enabling technology correlated. Over lengthy periods there may be little activity or traffic, but for short periods the traffic

  18. RESEARCH Open Access Transient receptor potential genes, smoking,

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    RESEARCH Open Access Transient receptor potential genes, smoking, occupational exposures and cough chemicals and may play an important role in the pathogenesis of cough. The aim was to study the influence of single nucleotide polymorphisms (SNPs) in TRP genes and irritant exposures on cough. Methods: Nocturnal

  19. REVIEW Open Access Assessing environmental impacts of offshore wind

    E-Print Network [OSTI]

    Aberdeen, University of

    REVIEW Open Access Assessing environmental impacts of offshore wind farms: lessons learned and recommendations for the future Helen Bailey1* , Kate L Brookes2 and Paul M Thompson3 Abstract Offshore wind power literature and our experience with assessing impacts of offshore wind developments on marine mammals

  20. Multiple Access Channel Optimal Spectrum Balancing for Upstream DSL Transmission

    E-Print Network [OSTI]

    -- Crosstalk, digital subscriber lines (DSL), dy- namic spectrum management (DSM), multiple access channel (MAC), decision feedback equalization. I. INTRODUCTION THE increasing demand for high speed services forces DSL coordination at the transmitter side and/or the receiver side, the crosstalk can be cancelled which leads