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


1

Airborne Laser Altimetry Digital Elevation Model, Barrow Environmental Observatory, 0.5m spatial resolution  

SciTech Connect

The dataset is a digital elevation model, DEM, of a 2km by 7km region in the vicinity of the Barrow Environmental Observatory near Barrow, Ak.

Cathy Wilson; Chandana Gangodagamage; Joel Rowland

2013-12-08T23:59:59.000Z

2

Airborne Laser Altimetry Digital Elevation Model, Barrow Environmental Observatory, 0.5m spatial resolution  

DOE Data Explorer (OSTI)

The dataset is a digital elevation model, DEM, of a 2km by 7km region in the vicinity of the Barrow Environmental Observatory near Barrow, Ak.

Cathy Wilson; Chandana Gangodagamage; Joel Rowland

3

Building Outline Extraction from Digital Elevation Models Using Marked Point Processes  

Science Conference Proceedings (OSTI)

This work presents an automatic algorithm for extracting vectorial land registers from altimetric data in dense urban areas. We focus on elementary shape extraction and propose a method that extracts rectangular buildings. The result is a vectorial land ... Keywords: MCMC, RJMCMC, building detection, dense urban area, digital elevation models, image processing, inhomogeneous Poisson point process, land register, laser data, simulated annealing, stochastic geometry

Mathias Ortner; Xavier Descombes; Josiane Zerubia

2007-04-01T23:59:59.000Z

4

The effect of morphological smoothening by reconstruction on the extraction of peaks and pits from digital elevation models  

Science Conference Proceedings (OSTI)

In this paper, the effect of morphological smoothening by reconstruction on the extraction of peaks and pits from digital elevation models (DEMs) is studied. First, a mathematical morphological based algorithm to extract peaks and pits from DEMs is developed. ... Keywords: DEM smoothening, Digital elevation models, Kernel, Morphological smoothening by reconstruction, Peaks and pits

Dinesh Sathyamoorthy

2007-09-01T23:59:59.000Z

5

Application of Low-Cost Digital Elevation Models to Detect Change in Forest Carbon Sequestration Projects  

DOE Green Energy (OSTI)

This two-year study evaluated advanced multispectral digital imagery applications for assessment of forest carbon stock change. A series of bench and field studies in North Carolina and Ohio tested aerial assessments of forest change between two time periods using two software packages (ERDAS and TERREST) for Digital Elevation Model (DEM) creation, automated classification software (eCognition) for canopy segmentation and a multiple ranging laser designed to improve quality of elevation data. Results of the DEM software comparison showed that while TERREST has the potential to produce much higher resolution DEM than ERDAS, it is unable to resolve crucial canopy features adequately. Lab tests demonstrated that additional laser data improves image registration and Z-axis DEM quality. Data collected in the field revealed difficult challenges in correctly modeling the location of laser strike and subsequently determining elevations in both software packages. Automated software segmentation of tree canopies provided stem diameter and biomass carbon estimates that were within 3% of comparable ground based estimates in the Ohio site and produced similar biomass estimates for a limited number of plots in the Duke forest. Tree height change between time periods and canopy segmentation from multispectral imagery allowed calculation of forest carbon stock change at costs that are comparable to those for ground-based methods. This work demonstrates the potential of lower cost imagery systems enhanced with laser data to collect high quality imagery and paired laser data for forestry and environmental applications. Additional research on automated canopy segmentation and multi-temporal image registration is needed to refine these methods for commercial use.

Kenneth Glenn MacDicken

2007-07-31T23:59:59.000Z

6

The effects of digital elevation model resolution on the calculation and predictions of topographic wetness indices.  

DOE Green Energy (OSTI)

One of the largest exports in the Southeast U.S. is forest products. Interest in biofuels using forest biomass has increased recently, leading to more research into better forest management BMPs. The USDA Forest Service, along with the Oak Ridge National Laboratory, University of Georgia and Oregon State University are researching the impacts of intensive forest management for biofuels on water quality and quantity at the Savannah River Site in South Carolina. Surface runoff of saturated areas, transporting excess nutrients and contaminants, is a potential water quality issue under investigation. Detailed maps of variable source areas and soil characteristics would therefore be helpful prior to treatment. The availability of remotely sensed and computed digital elevation models (DEMs) and spatial analysis tools make it easy to calculate terrain attributes. These terrain attributes can be used in models to predict saturated areas or other attributes in the landscape. With laser altimetry, an area can be flown to produce very high resolution data, and the resulting data can be resampled into any resolution of DEM desired. Additionally, there exist many maps that are in various resolutions of DEM, such as those acquired from the U.S. Geological Survey. Problems arise when using maps derived from different resolution DEMs. For example, saturated areas can be under or overestimated depending on the resolution used. The purpose of this study was to examine the effects of DEM resolution on the calculation of topographic wetness indices used to predict variable source areas of saturation, and to find the best resolutions to produce prediction maps of soil attributes like nitrogen, carbon, bulk density and soil texture for low-relief, humid-temperate forested hillslopes. Topographic wetness indices were calculated based on the derived terrain attributes, slope and specific catchment area, from five different DEM resolutions. The DEMs were resampled from LiDAR, which is a laser altimetry remote sensing method, obtained from the USDA Forest Service at Savannah River Site. The specific DEM resolutions were chosen because they are common grid cell sizes (10m, 30m, and 50m) used in mapping for management applications and in research. The finer resolutions (2m and 5m) were chosen for the purpose of determining how finer resolutions performed compared with coarser resolutions at predicting wetness and related soil attributes. The wetness indices were compared across DEMs and with each other in terms of quantile and distribution differences, then in terms of how well they each correlated with measured soil attributes. Spatial and non-spatial analyses were performed, and predictions using regression and geostatistics were examined for efficacy relative to each DEM resolution. Trends in the raw data and analysis results were also revealed.

Drover, Damion, Ryan

2011-12-01T23:59:59.000Z

7

Construction of Digital Elevation Models for a Southern European City and a Comparative Morphological Analysis with Respect to Northern European and North American Cities  

Science Conference Proceedings (OSTI)

A morphometric analysis of a southern European city and the derivation of relevant fluid dynamical parameters for use in urban flow and dispersion models are explained in this paper. Calculated parameters are compared with building statistics ...

Silvana Di Sabatino; Laura S. Leo; Rosella Cataldo; Carlo Ratti; Rex E. Britter

2010-07-01T23:59:59.000Z

8

Digital Modeling of Material Appearance  

Science Conference Proceedings (OSTI)

Computer graphics systems are capable of generating stunningly realistic images of objects that have never physically existed. In order for computers to create these accurately detailed images, digital models of appearance must include robust data to ... Keywords: Computer Graphics

Julie Dorsey; Holly Rushmeier; Franois Sillion

2007-12-01T23:59:59.000Z

9

Digital Elevation Models for the Chajnantor Site  

E-Print Network (OSTI)

Geografico Militar de Chile surveyed the entire country with high quality, high altitude aerial photographs) in Chile with a planar resolution of 5m. Made by McLain Aerial in Tucson from aerial photographs provided) are available at about 30 m resolution for much of the United States through the United State Geological Survey

Groppi, Christopher

10

Automated user modeling for personalized digital libraries  

Science Conference Proceedings (OSTI)

Digital libraries (DLs) have become one of the most typical ways of accessing any kind of digitalized information. Due to this key role, users welcome any improvements on the services they receive from DLs. One trend used to improve digital services ... Keywords: Adaptive library services, Digital libraries, Personalization, User modeling

E. Frias-Martinez; G. Magoulas; S. Chen; R. Macredie

2006-06-01T23:59:59.000Z

11

Automated User Modeling for Personalized Digital Libraries  

E-Print Network (OSTI)

Digital libraries (DL) have become one of the most typical ways of accessing any kind of digitalized information. Due to this key role, users welcome any improvements on the services they receive from digital libraries. One trend used to improve digital services is through personalization. Up to now, the most common approach for personalization in digital libraries has been user-driven. Nevertheless, the design of efficient personalized services has to be done, at least in part, in an automatic way. In this context, machine learning techniques automate the process of constructing user models. This paper proposes a new approach to construct digital libraries that satisfy user’s necessity for information: Adaptive Digital Libraries, libraries that automatically learn user preferences and goals and personalize their interaction using this information.

E. Frias-martinez; G. Magoulas; S. Chen; R. Macredie

2006-01-01T23:59:59.000Z

12

A Surface-Corrected Gaussian Model for Elevated Sources  

Science Conference Proceedings (OSTI)

A Gaussian model for continuous elevated sources is developed which uses a continuous distribution of ground-level sources to replace the use of the image source. For the case of Fickian diffusion with uniform wind, this model is mathematically ...

Thomas J. Overcamp

1983-06-01T23:59:59.000Z

13

Adaptive smoothing of valleys in DEMs using TIN interpolation from ridgeline elevations: An application to morphotectonic aspect analysis  

Science Conference Proceedings (OSTI)

This paper presents a smoothing method that eliminates valleys of various Strahler-order drainage lines from a digital elevation model (DEM), thus enabling the recovery of local and regional trends in a terrain. A novel method for automated extraction ... Keywords: Aspect analysis, Digital drainage analysis, Digital elevation model, Digital terrain modelling, Rose diagram, Smoothing, Tectonic geomorphology

Gyozo Jordan

2007-05-01T23:59:59.000Z

14

Model-Based Troubleshooting of Digital Systems  

E-Print Network (OSTI)

This thesis describes a methodology, a representation, and an implemented program for troubleshooting digital circuit boards at roughly the level of expertise one might expect in a human novice. Existing methods for ...

Hamscher, Walter Charles

1988-08-01T23:59:59.000Z

15

A real models laboratory and an elevator model controlled through programmable controller (PLC)  

Science Conference Proceedings (OSTI)

The paper is focused on description of laboratory models that are used in the process of education at our faculty. The models are connected to programmable logical controllers (PLC) and through these equipments the models are controlled. As the first ... Keywords: PLC, automatic control, education, elevator, real control, real equipment models

Tomas Sysala; Ondrej Vrzal

2011-05-01T23:59:59.000Z

16

Behavioral modeling and digital calibration of pipeline analog to digital converters  

E-Print Network (OSTI)

This research focuses on digital calibration of pipeline analog to digital converters (ADCs) and also modeling of error sources and design parameters of pipeline ADCs. Modern applications such as communications systems require high resolution ADCs at high rates of conversion speed. Pipeline ADCs show great potential for high-speed high-resolution applications. But limited matching property of available process technologies does not permit implementation of high-resolution pipeline ADCs unless a calibration scheme is used. There are two major methods of calibration. The first uses some redundant analog components implemented during the design of the ADC to adjust some of the analog components. These redundant analog components also have limited accuracy and cause some additional problems such as loading and area consumption. Laser trimming of analog components cannot solve the problem due to difficulty of accurate trimming beyond 12-bit. Correcting the component's matching error in digital domain is the second method of calibration. This thesis presents detailed analyses for the possibility of digital correction of the errors due to analog circuitry. As a result an efficient method for the digital calibration method is proposed. This method has the advantage of measuring the required calibration coefficients by sweeping the input voltage through the whole dynamic range.

Bilhan, Erkan

2001-01-01T23:59:59.000Z

17

Elevation cable modeling for interactive simulation of cranes  

Science Conference Proceedings (OSTI)

In this paper, the way to simulate hoisting cables in real time is addressed. We overcome instability in such simulation by considering a two-layered model: a model for the dynamics of a cable passing through a set of pulleys and an oscillation model ... Keywords: flexible cables, interactive simulation, physically-based animation

Ignacio García-Fernández; Marta Pla-Castells; Rafael J. Martínez-Durá

2008-07-01T23:59:59.000Z

18

Vertical Dispersion from Surface and Elevated Releases: An Investigation of a Non-Gaussian Plume Model  

Science Conference Proceedings (OSTI)

The vertical diffusion of a passive tracer released from surface and elevated sources in a neutrally stratified boundary layer has been studied by comparing field and laboratory experiments with a non-Gaussian K-theory model that assumes power-...

Michael J. Brown; S. Pal Arya; William H. Snyder

1993-03-01T23:59:59.000Z

19

An observer model for lesion detectability in contrast-enhanced digital mammography  

Science Conference Proceedings (OSTI)

Lesion detectability in contrast-enhanced digital mammography (CEDM) was studied using a model observer for task-based system evaluation Digital mammography (DM) and CEDM images were simulated to include a realistic mammographic appearance and contrast ... Keywords: contrast enhancement, image perception, image quality, mammography, observer model

Melissa L. Hill; James G. Mainprize; Martin J. Yaffe

2010-06-01T23:59:59.000Z

20

Digital herders and phase transition in a voting model  

E-Print Network (OSTI)

In this paper, we discuss a voting model with two candidates, $C_1$ and $C_2$. We set two types of voters--herders and independents. The voting of independent voters is based on their fundamental values; on the other hand, the voting of herders is based on the number of votes. Herders always select the majority of the previous $r$ votes, which is visible to them. We call them digital herders. We can accurately calculate the distribution of votes for special cases. When $r\\geq 3$, we find that a phase transition occurs at the upper limit of $t$, where $t$ is the discrete time (or number of votes). As the fraction of herders increases, the model features a phase transition beyond which a state where most voters make the correct choice coexists with one where most of them are wrong. On the other hand, when $rperformance is the same as that of the independent voters. At last, from the simple experiments, we recognize the behavior of human beings.

Hisakado, Masato

2011-01-01T23:59:59.000Z

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


21

Multi-scale modeling and experimental investigations of geopolymeric gels at elevated temperatures  

Science Conference Proceedings (OSTI)

Geopolymers are an emerging class of cementitious binders formed by aluminum-silica rich activating materials. Experimental results indicate that geopolymer concrete is relatively stable at elevated temperatures, and could be possibly utilized in applications ... Keywords: Geopolymer concrete, High temperature applications, Microstructure characterization, Multi-scale modeling

Kunal Kupwade-Patil, Fernando Soto, Ancy Kunjumon, Erez N. Allouche, Daniela S. Mainardi

2013-06-01T23:59:59.000Z

22

Common Metadata for Climate Modelling Digital Repositories CIM-enabled OASIS  

E-Print Network (OSTI)

Common Metadata for Climate Modelling Digital Repositories CIM-enabled OASIS CERFACS Technical-1.2.1 Scientific Digital Repositories DOCUMENT Deliverable D5.7 Month 36 Deliverable Title CIM-enabled OASIS to manipulate the CIM Authors S. Valcke, J.M. Epitalon, M.P. Moine, CERFACS Document Status Final Document Link

23

Integrating electronic pathfinders in digital libraries: a model for China  

Science Conference Proceedings (OSTI)

Electronic pathfinders/subject guides help library patrons learn about library resources and develop research strategies. By reviewing the existing literature and the current status of reference service in digital libraries in China, the authors suggest ...

Hanrong Wang; William J. Hubbard

2004-12-01T23:59:59.000Z

24

A Surface Water Protection Assessment Tool that uses Digital Elevation Models1 Darwin L. Sorensen  

E-Print Network (OSTI)

.03, 0.05 (Flammer and Jeppson 1996) and 0.1 (Kouwen and Fathi-Moghadam 2000) for typical rivers, Redlands, CA. Flammer, G. H., and Jeppson, R. W. (1996). Fundamental principles and application of fluid

Tarboton, David

25

Evaluating digital elevation models for glaciologic applications: An example from Nevado Coropuna, Peruvian Andes  

E-Print Network (OSTI)

,b a Department of Geography, University of Colorado, CB 260, Boulder CO 80309, USA b Institute of Arctic and Alpine Research, University of Colorado, CB 450, Boulder CO 80309, USA c Institut de Recherche pour le. The glaciated area was 82.6 km2 in 1962, based on aerial photography. We estimate the glacier area to be ca. 60

Williams, Mark W.

26

Application of Low-Cost Digital Elevation Models to Detect Change...  

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

DEtEct chAngE in forEst cArbon sEquEstrAtion projEcts Background Although combustion of fossil fuels is the major contributor to the buildup of carbon dioxide (CO 2 ) in the...

27

Geometric and radiometric improvement of an ikonos panchromatic image using a digital surface model  

Science Conference Proceedings (OSTI)

High resolution satellite images are now important data sources for map update in urban areas. Digital surface models (DSM) acquired by laser scanning are also becoming popular for urban planning and other applications. This paper deals with the integration ...

José Gonçalves

2006-09-01T23:59:59.000Z

28

On the Application of a Lagrangian Particle–Puff Model to Elevated Sources in Surface Layers with Neutral Stability  

Science Conference Proceedings (OSTI)

A Lagrangian particle–puff model is presented for predicting the statistical properties of tracers dispersing from elevated sources into surface layers with neutral stability. The model is based upon F. A. Gifford’s meandering-plume concept and ...

Andrew Michael Reynolds

2000-07-01T23:59:59.000Z

29

A hybrid SVM/DDBHMM decision fusion modeling for robust continuous digital speech recognition  

Science Conference Proceedings (OSTI)

This paper proposes an improved hybrid support vector machine and duration distribution based hidden Markov (SVM/DDBHMM) decision fusion model for robust continuous digital speech recognition. We investigate the probability outputs combination of support ... Keywords: Duration distribution based hidden Markov model (DDBHMM), Gaussian mixture model, Speech recognition, Support vector machine

Jingwei Liu; Zuoying Wang; Xi Xiao

2007-06-01T23:59:59.000Z

30

TESLA Report 2003-28 TESLA cavity modeling and digital implementation  

E-Print Network (OSTI)

TESLA Report 2003-28 TESLA cavity modeling and digital implementation with FPGA technology solution, Warsaw University of Technology Stefan Simrock TESLA, DESY, Hamburg ABSTRACT The cavity resonator modeling for the TESLA - TeV­Energy Superconducting Linear Accelerator project is initially introduced

31

Integration of regional to outcrop digital data: 3D visualisation of multi-scale geological models  

Science Conference Proceedings (OSTI)

Multi-scale geological models contain three-dimensional, spatially referenced data, typically spanning at least six orders of magnitude from outcrop to regional scale. A large number of different geological and geophysical data sources can be combined ... Keywords: Digital geological mapping, Immersive visualisation, Terrestrial laser-scanning, User interaction, Virtual outcrop models

R. R. Jones; K. J. W. McCaffrey; P. Clegg; R. W. Wilson; N. S. Holliman; R. E. Holdsworth; J. Imber; S. Waggott

2009-01-01T23:59:59.000Z

32

Digital sound synthesis of brass instruments by physical modeling, Digital Audio Effects (DAFx) 04  

E-Print Network (OSTI)

The Functional Transformation Method (FTM) is an established method for sound synthesis by physical modeling, which has proven its feasibility so far by the application to strings and membranes. Based on integral transformations, it provides a discrete solution for continuous physical problems given in form of initialboundary-value problems. This paper extends the range of applications of the FTM to brass instruments. A full continuous physical model of the instrument, consisting of an air column, a mouthpiece and the player’s lips is introduced and solved in the discrete domain. It is shown, that the FTM is a suitable method also for sound synthesis of brass instruments. 1.

Bernhard Krach; Stefan Petrausch; Rudolf Rabenstein

2004-01-01T23:59:59.000Z

33

Data transmission over GSM voice channel using digital modulation technique based on autoregressive modeling of speech production  

Science Conference Proceedings (OSTI)

This paper presents a novel digital data modulation and demodulation algorithm ARDMA based on the principles of autoregressive modeling (AR) of speech production. In the first step a sustained voiced speech signal characteristics are analyzed using autoregressive ... Keywords: Autoregressive modeling, Data transmission systems, Digital modulations, GSM, Linear predictive coding, Speech codecs, Speech production model

Bojan Kotnik; Zdenko Mezgec; Janja Sve?ko; Amor Chowdhury

2009-07-01T23:59:59.000Z

34

Modeling of Digital Instrumentation and Control in Nuclear Power Plant Probabilistic Risk Assessments  

Science Conference Proceedings (OSTI)

Probabilistic risk assessment (PRA) typically models hardware components in terms of their failure probability and the effects that any given component failure has on the system it resides in. Digital systems, which include both hardware and software, bring new modeling challenges: determination of the appropriate level of detail to use in the logic models, and estimation of failure rates for software components. Failure probabilities for hardware are typically based on operating experience with componen...

2012-07-30T23:59:59.000Z

35

Polarimetric remote sensing system analysis: Digital Imaging and Remote Sensing Image Generation (DIRSIG) model  

E-Print Network (OSTI)

i Polarimetric remote sensing system analysis: Digital Imaging and Remote Sensing Image Generation CENTER FOR IMAGING SCIENCE Title of Dissertation: Polarimetric remote sensing system analysis: DIRSIG____________________________________________________________ Date #12;vi #12;vii Polarimetric remote sensing system analysis: DIRSIG model validation and impact

Salvaggio, Carl

36

Modeling Viral Economies for Digital Media Department of ECE  

E-Print Network (OSTI)

for the fixed price OL system shows a similar trend when PSP0 is low. As PSP0 increases, buy- ers start-behavior model that abstracts marketing, pricing, and executed transactions. The model uses simulation to predict constructed an efficient dynamic pricing scheme and evalu- ated its performance in considered multimedia

Kirovski, Darko

37

Towards an Automated Digital Data Forensic Model with specific reference to Investigation Processes  

E-Print Network (OSTI)

Existing digital forensics frameworks do not provide clear guidelines for conducting digital forensics investigation. However, had a framework existed, investigations based on known procedures and processes would follow strict prescribed standardisation. This should direct investigations following a set method for comparisons; ensuring future investigation is following one standard. Digital forensics lack confirmed and tested methods; this became obvious when we consider varied interpretations of the same case by participants using different investigation methods. Previous research covered several approaches to setting a forensics framework, which are mere adaptations of previous models. We found that only a few models present a framework that defines or delivers qualified likeness between the different disciplines. From this, possible pattern analysis from different disciplines is possible (Kohn, 2007). This underlines the need to standardise processes, to ensure proven and consistent results. Digital Forensics Science needs a new approach, defining and standardising investigation processes by affirming an investigation framework. Present research does not enough cover how existing forensic frameworks are used as guideline while conduct investigations. As a result, wide general interpretations are possible instead of following a set standard. Investigation processes and in particular how data confirmation is conducted during and after

Australian Digital; Forensics Conference; Johan Scholtz; Ajit Narayanan; Johan Scholtz; Professor Ajit Narayanan

2010-01-01T23:59:59.000Z

38

Modeling char oxidation behavior under Zone II burning conditions at elevated pressures  

SciTech Connect

For accurate modeling of the coal combustion process at elevated pressures, account must be made for variations in char-particle structure. As pressure is increased, particle swelling increases during the devolatilization of certain bituminous coals, yielding a variety of char-particle structures, from uniform high-density particles to thin-walled non-uniform low-density particles having large internal void volumes. Since under Zone II burning conditions the char conversion rate depends upon the accessibility of the internal surfaces, the char structure plays a key role in determining particle burnout times. In our approach to characterize the impact of char structure on particle burning rates, effectiveness factors appropriate for thin-walled cenospherical particles and thick-walled particles having a few large cavities are defined and related to the effectiveness factor for uniform high-density particles that have no large voids, only a random distribution of pores having a mean pore size in the sub-micron range. For the uniform case, the Thiele modulus approach is used to account for Zone 11 type burning in which internal burning is limited by the combined effects of pore diffusion and the intrinsic chemical reactivity of the carbonaceous material. In the paper, the impact of having a variety of char structures in a mix of particles burning under Zone II burning conditions is demonstrated.

Ma, L.Q.; Mitchell, R. [Stanford University, Stanford, CA (USA). High Temperature Gasdynamics Laboratory

2009-01-15T23:59:59.000Z

39

Research on multi-objective on-line evolution technology of digital circuit based on FPGA model  

Science Conference Proceedings (OSTI)

A novel multi-objective evolutionary mechanism for digital circuits is proposed. Firstly, each CLB of FPGA is configured as minimum evolutionary structure cell (MESC). The two-dimensional array consisted of MESCs by integer scale values is coded. And ... Keywords: FPGA model, On-line evolution, digital circuit, evolvable hardware, multi-objective evolutionary method

Guijun Gao; Youren Wang; Jiang Cui; Rui Yao

2007-09-01T23:59:59.000Z

40

DIALOG: A framework for modeling, analysis and reuse of digital forensic knowledge  

Science Conference Proceedings (OSTI)

This paper presents DIALOG (Digital Investigation Ontology); a framework for the management, reuse, and analysis of Digital Investigation knowledge. DIALOG provides a general, application independent vocabulary that can be used to describe an investigation ... Keywords: Digital, Investigation, Ontology, Registry, Windows

Damir Kahvedi?; Tahar Kechadi

2009-09-01T23:59:59.000Z

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


41

Products and Process Modeling in Cx: A Significant Challenge for Digital-Cx  

E-Print Network (OSTI)

In the next decade, digitalization of commissioning (Cx) is likely to be a key advance, in the field of AEC. This requires that as much of what we do manually, through word processing and spreadsheets can be done through sophisticated computer applications to enhance Cx productivity. The first step in achieving this is the creation of reliable, persistent, accurate, just-in-time, and easily accessible Cx information. Towards this end we are building a proof-of-concept prototype for functional performance tests (FPT) that can help Cx agents derive product models through specifying process descriptions.

Akin, O.; Akinci, B.; Garrett, J.; Lee, K. J.

2008-10-01T23:59:59.000Z

42

Test Cases for Wind Power Plant Dynamic Models on Real-Time Digital Simulator: Preprint  

DOE Green Energy (OSTI)

The objective of this paper is to present test cases for wind turbine generator and wind power plant models commonly used during commissioning of wind power plants to ensure grid integration compatibility. In this paper, different types of wind power plant models based on the Western Electricity Coordinating Council Wind Generator Modeling Group's standardization efforts are implemented on a real-time digital simulator, and different test cases are used to gauge their grid integration capability. The low-voltage ride through and reactive power support capability and limitations of wind turbine generators under different grid conditions are explored. Several types of transient events (e.g., symmetrical and unsymmetrical faults, frequency dips) are included in the test cases. The differences in responses from different types of wind turbine are discussed in detail.

Singh, M.; Muljadi, E.; Gevorgian, V.

2012-06-01T23:59:59.000Z

43

A Markov Model for Assessing the Reliability of a Digital Feedwater Control System  

SciTech Connect

A Markov approach has been selected to represent and quantify the reliability model of a digital feedwater control system (DFWCS). The system state, i.e., whether a system fails or not, is determined by the status of the components that can be characterized by component failure modes. Starting from the system state that has no component failure, possible transitions out of it are all failure modes of all components in the system. Each additional component failure mode will formulate a different system state that may or may not be a system failure state. The Markov transition diagram is developed by strictly following the sequences of component failures (i.e., failure sequences) because the different orders of the same set of failures may affect the system in completely different ways. The formulation and quantification of the Markov model, together with the proposed FMEA (Failure Modes and Effects Analysis) approach, and the development of the supporting automated FMEA tool are considered the three major elements of a generic conceptual framework under which the reliability of digital systems can be assessed.

Chu,T.L.; Yue, M.; Martinez-Guridi, G.; Lehner, J.

2009-02-11T23:59:59.000Z

44

Simulated effects of elevated CO{sub 2} on nitrogen cycling using the NuCM model  

DOE Green Energy (OSTI)

The interactions between elevated CO{sub 2} and N cycling were explored using simulations generated by the Nutrient Cycling Model (NuCM) for a Pinus taeda site at Duke, North Carolina and a mixed deciduous site at Walker Branch, Tennessee. The simulations tested whether N limitation would prevent growth increase in response to elevated CO{sub 2} and whether growth response to CO{sub 2} in N-limited systems could be facilitated by increased biomass/N (reduced concentration) and/or increased litter N mineralization. Nitrogen limitation precluded additional growth when target growth rates and litterfall were increased (simulating potential response to elevated CO{sub 2}) at the Duke site. At the Walker Branch site, increasing target growth and litterfall caused a slight (790) increases in growth. Reducing foliar N concentrations caused reduced growth because of N limitation created by reduced litter quality (C/N ratio), reduced decomposition and N accumulation in forest floor. These effects were most pronounced at the Duke site, where the forest floor N turnover rate was lower than at the Walker Branch site. Reducing wood N concentration allowed prolonged increases in growth because of greater biomass/N; however, N uptake was reduced, allowing greater N immobilization in the forest floor and soil. Increased N mineralization caused increased growth at the Duke site but not at Walker Branch.

D.W. Johnson

1998-10-14T23:59:59.000Z

45

Virtual Shikki and Sazaedo: Shape Modeling in Digital Preservation of Japanese Lacquer Ware and Temples  

Science Conference Proceedings (OSTI)

Abstract: Issues of digital preservation of shapes and internal structures of culturally valuable objects are discussed. An overview of existing approaches to digital shape preservation as well as corresponding problems is given. Our approach is based ...

G. Pasko; A. Pasko; T. Ikedo; C. Vilbrandt

2001-04-01T23:59:59.000Z

46

Elevated Temperature Primary Load Design Method Using Pseudo Elastic-Perfectly Plastic Model  

SciTech Connect

A new primary load design method for elevated temperature service has been developed. Codification of the procedure in an ASME Boiler and Pressure Vessel Code, Section III Code Case is being pursued. The proposed primary load design method is intended to provide the same margins on creep rupture, yielding and creep deformation for a component or structure that are implicit in the allowable stress data. It provides a methodology that does not require stress classification and is also applicable to a full range of temperature above and below the creep regime. Use of elastic-perfectly plastic analysis based on allowable stress with corrections for constraint, steady state stress and creep ductility is described. This approach is intended to ensure that traditional primary stresses are the basis for design, taking into account ductility limits to stress re-distribution and multiaxial rupture criteria.

Carter, Peter [Stress Engineering Services Inc.; Sham, Sam [ORNL; Jetter, Robert I [Consultant

2012-01-01T23:59:59.000Z

47

Understanding digital inequality: comparing continued use behavioral models of the socio-economically advantaged and disadvantaged  

Science Conference Proceedings (OSTI)

Digital inequality is one of the most critical issues in the knowledge economy. The private and public sectors have devoted tremendous resources to address such inequality, yet the results are inconclusive. Theoretically grounded empirical research is ... Keywords: IT policy, digital divide, digital inequality, socio-economic inequality, technology acceptance

J. J. Po-An Hsieh; Arun Rai; Mark Keil

2008-03-01T23:59:59.000Z

48

Elevated Mixed Layers in the Regional Severe Storm Environment: Conceptual Model and Case Studies  

Science Conference Proceedings (OSTI)

A conceptual model of the evolution of the severe local storm environment is discussed in conjunction with three case studies drawn from data obtained during the 1979 SESAME field program. The conceptual model describes how a particular ...

T. N. Carlson; S. G. Benjamin; G. S. Forbes; Y-F. Li

1983-07-01T23:59:59.000Z

49

Speaker Independent Isolated Digit Voice Recognition Using Discrete Hidden Markov Model  

E-Print Network (OSTI)

Many practical interactive voice response systems require speaker independent speech recognition. Achieving speaker independence is dicult as we do not have direct methods to prepare speaker independent reference patterns of the sub-units of the speech and compare a given sub-unit of speech with them. Hidden Markov Models provide better means than other methods to achieve speaker independence with the help of training speech by a suciently large number of speakers. Hidden Markov models have the inherent capability to model the variations in speed of the speech. We developed an interactive voice response system based on discrete Hidden Markov Models. In our system we use a word detector and a linear prediction based signal processing front end which are also developed in this work. We recorded telephone quality speech with the help of modem interface and prepared database of spoken digits of 160 speakers using modem for the training purpose to achieve speaker independence. We also present dierent ne tuning methods to improve the performance of speech recognition. We also present word rejection criterion to improve con dence of the recognition. We also present an interactive voice response system which is developed using the technology developed in this thesis.

K Vasudeva Rao

2000-01-01T23:59:59.000Z

50

AUTOMATIC GENERATION OF DIGITAL BUILDING MODELS FOR COMPLEX STRUCTURES FROM LIDAR DATA  

E-Print Network (OSTI)

Automated and reliable 3D reconstruction of man-made structures is important for various applications in virtual reality, city modeling, military training, etc. This paper is concerned with the automated generation of Digital Building Models (DBM) associated with complex structures comprised of small parts with different slopes, sizes, and shapes, from a LiDAR point cloud. The proposed methodology consists of a sequence of four steps: ground/non-ground point separation; building hypothesis generation; segmentation of planar patches and intermediate boundary generation; and boundary refinement and 3D wire frame generation. First, a novel ground/non-ground point classification technique is proposed based on the visibility analysis among ground and non-ground points in a synthesized perspective view. Once the LiDAR point cloud has been classified into ground and non-ground points, the non-ground points are analyzed and used to generate hypotheses of building instances based on the point attributes and the spatial relationships among the points. The third step of the proposed methodology segments each building hypothesis into a group of planar patches while simultaneously considering the attribute similarity and the spatial proximity among the points. The intermediate boundaries for segmented clusters are produced by using a modified convex hull algorithm. These boundaries are used as initial approximations of the planar surfaces comprising the building model of a given hypothesis. The last step of the proposed methodology utilizes these initial boundaries to come up with a refined set of boundaries, which are connected to produce a wire frame representing the DBM. The performance of the proposed methodology has been evaluated using experimental results from real data.

Changjae Kim; Ayman Habib; Yu-chuan Chang

2008-01-01T23:59:59.000Z

51

Regulation of Digital Businesses with Natural Monopolies or Third-Party Payment Business Models: Antitrust Lessons from the Analysis of Google  

Science Conference Proceedings (OSTI)

Some digital business models may be so innovative that they overwhelm existing regulatory mechanisms, both legislation and historical jurisprudence, and require extension to or modification of antitrust law. Regulatory policies that were developed in ... Keywords: Antitrust, Bundling And Tying, Contestability, Deterred Market Entry, Digital Business Strategies, Essential Facilities Doctrine, Google, Key Word Auctions, Online Search, Relevant Market Share, Sponsored Search

Eric Clemons; Nehal Madhani

2010-01-01T23:59:59.000Z

52

A geometric modelling framework for conceptual structural design from early digital architectural models  

Science Conference Proceedings (OSTI)

Computer support for conceptual structural design is still ineffective. This is due, in part, to the fact that current computer applications do not recognize that structural design and architectural design are highly interdependent processes, particularly ... Keywords: Architectural design, Conceptual structural design, Geometric modeling, Integrated design

Rodrigo Mora; Claude Bédard; Hugues Rivard

2008-04-01T23:59:59.000Z

53

Modeling spatial variability of 137Cs surface activity in a mountain zone  

Science Conference Proceedings (OSTI)

Based on 137Cs surface activity field studies performed on a workshop zone, we succeeded in identifying the main criterion permitting surface activity modeling to be extended. Geomorphometric data derived from the Digital Elevation Model (slope, ...

J. M. Métivier; L. Pourcelot

2002-01-01T23:59:59.000Z

54

Coupling Aerosol-Cloud-Radiative Processes in the WRF-Chem Model: Investigating the Radiative Impact of Elevated Point Sources  

Science Conference Proceedings (OSTI)

The local and regional influence of elevated point sources on summertime aerosol forcing and cloud-aerosol interactions in northeastern North America was investigated using the WRF-Chem community model. The direct effects of aerosols on incoming solar radiation were simulated using existing modules to relate aerosol sizes and chemical composition to aerosol optical properties. Indirect effects were simulated by adding a prognostic treatment of cloud droplet number and adding modules that activate aerosol particles to form cloud droplets, simulate aqueous phase chemistry, and tie a two-moment treatment of cloud water (cloud water mass and cloud droplet number) to an existing radiation scheme. Fully interactive feedbacks thus were created within the modified model, with aerosols affecting cloud droplet number and cloud radiative properties, and clouds altering aerosol size and composition via aqueous processes, wet scavenging, and gas-phase-related photolytic processes. Comparisons of a baseline simulation with observations show that the model captured the general temporal cycle of aerosol optical depths (AODs) and produced clouds of comparable thickness to observations at approximately the proper times and places. The model slightly overpredicted SO2 mixing ratios and PM2.5 mass, but reproduced the range of observed SO2 to sulfate aerosol ratios, suggesting that atmospheric oxidation processes leading to aerosol sulfate formation are captured in the model. The baseline simulation was compared to a sensitivity simulation in which all emissions at model levels above the surface layer were set to zero, thus removing stack emissions. Instantaneous, site-specific differences for aerosol and cloud related properties between the two simulations could be quite large, as removing above-surface emission sources influenced when and where clouds formed within the modeling domain. When summed spatially over the finest resolution model domain (the extent of which corresponds to the typical size of a single GCM grid cell) and temporally over a three day analysis period, total rainfall in the sensitivity simulation increased by 31% over that in the baseline simulation. Fewer optically thin clouds, arbitrarily defined as a cloud exhibiting an optical depth less than 1, formed in the sensitivity simulation. Domain-averaged AODs dropped from 0.46 in the baseline simulation to 0.38 in the sensitivity simulation. The overall net effect of additional aerosols attributable to primary particulates and aerosol precursors from point source emissions above the surface was a domain-averaged reduction of 5 W m-2 in mean daytime downwelling shortwave radiation.

Chapman, Elaine G.; Gustafson, William I.; Easter, Richard C.; Barnard, James C.; Ghan, Steven J.; Pekour, Mikhail S.; Fast, Jerome D.

2009-02-01T23:59:59.000Z

55

Digital PCR  

Science Conference Proceedings (OSTI)

*. Bookmark and Share. Digital PCR. Summary: Digital PCR (dPCR) is a method used to quantify nucleic acids (DNA, RNA, cDNA). ...

2013-04-26T23:59:59.000Z

56

Digital materials for digital fabrication  

E-Print Network (OSTI)

This thesis introduces digital materials by analogy with digital computation and digital communications. Traditional fabrication techniques include pick-and-place, roll-to-roll, molding, patterning and more. Current research ...

Popescu, George A

2007-01-01T23:59:59.000Z

57

This study aims to quantify the effects of topographic vari-ability (measured by coefficient variation of elevation, CV) and  

E-Print Network (OSTI)

, and topographic variability. Introduction As defined by the U.S. Geological Survey, a grid Digital Elevation Model transmission of a laser PHOTOGRAMMETRIC ENGINEERING & REMOTE SENSING June 2010 1 Sierra Nevada Research). The use of airborne lidar sensors for topographic mapping is rapidly becoming a standard practice

Guo, Qinghua

58

Digital buildings - Challenges and opportunities  

Science Conference Proceedings (OSTI)

This paper considers the wider implications of digital buildings (as currently exemplified by building information models) becoming the norm within the building construction sector. Current deployment is reviewed and the growing opportunity to better ... Keywords: BIM, Building, Digital, Futures, Sustainability

Alastair Watson

2011-10-01T23:59:59.000Z

59

Circuit breaker model for digital simulation based on Mayr`s and Cassie`s differential arc equations  

Science Conference Proceedings (OSTI)

A model of a circuit breaker for digital simulation programs based on the Mayr`s and Cassie`s differential arc equations was developed. The model can be used to determine the current interruption capability of the circuit breaker. The theoretical basis and the structure of the model are described. The model is verified on a sample of measured results, and the use of the model for practical application is demonstrated. Although the validation of the model is limited to the vicinity of current zero, it can be usefully used. Its advantage lies in the fact, that the simulation programs set and solve the system of breaker and network differential equations. Calculation of a breaker capability can so be done using a complex network.

Bizjak, G.; Zunko, P. [Univ. of Ljubljana (Slovenia). Faculty for Electrical and Computer Engineering; Povh, D. [Siemens AG, Erlangen (Germany)

1995-07-01T23:59:59.000Z

60

Digital control systems in nuclear power plants: Failure information, modeling concepts, and applications. Revision 1  

SciTech Connect

This report briefly describes some current applications of advanced computerized digital display and control systems at US commercial nuclear power plants and presents the results of a literature search that was made to gather information on the reliability of these systems. Both hardware and software reliability were addressed in this review. Only limited failure rate information was found, with the chemical process industry being the primary source of information on hardware failure rates and expert opinion the primary source for software failure rates. Safety-grade digital control systems are typically installed on a functional like-for-like basis, replacing older analog systems without substantially changing interactions with other plant systems. Future work includes performing a limited probabilistic risk assessment of a representative DCS to assess its risk significance.

Galyean, W.J.

1993-06-23T23:59:59.000Z

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


61

Digital Forensics  

Science Conference Proceedings (OSTI)

... Hany Farid Department of Computer Science Institute for Security ... the advent of digital cameras, powerful personal computers, and sophisticated ...

2010-10-05T23:59:59.000Z

62

Solar radiation modelling  

Science Conference Proceedings (OSTI)

The Sun is the main energy source of the life on the Earth. Thus, solar radiation energy data and models are important for many areas of research and applications. Many parameters influence the amount of solar energy at a particular standing point of ... Keywords: Digital elevation model, Energy of quasiglobal radiation, Meteorology, Shadows, Virtual Sun motion

Klemen Zakšek; Toma Podobnikar; Krištof Oštir

2005-03-01T23:59:59.000Z

63

Digital preservation: overview of current developments  

Science Conference Proceedings (OSTI)

ICSTI and ICSU Press, with support from UNESCO, co-sponsored a workshop on digital archiving that brought major stakeholders together to identify the key issues for each group in January 2000. The state of digital archiving art and practice at the time ... Keywords: business models, cooperation, digital archiving, digital preservation, framework, funding, guidelines, policies, projects, stakeholder roles, technologies

Gail M. Hodge

2002-01-01T23:59:59.000Z

64

Digital PCR  

Science Conference Proceedings (OSTI)

... Emulsion generator produces water-in-oil ... Number of PCR cycles Page 68. ... based on quote for 12.765 digital arrays 2012 &list price Sept 2012 ...

2013-04-16T23:59:59.000Z

65

Modeling Global and Regional Net Primary Production under Elevated Atmospheric CO2: On a Potential Source of Uncertainty  

Science Conference Proceedings (OSTI)

Terrestrial ecosystem models are built, among several reasons, to explore how the Earth’s biosphere responds to climate change and to the projected continual increase of atmospheric CO2 concentration. Many of these models adopt the Farquhar et ...

Mustapha El Maayar; Navin Ramankutty; Christopher J. Kucharik

2006-01-01T23:59:59.000Z

66

Digital Strategy  

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

New expectations require the Federal Government to be ready to deliver and receive digital information and services anytime, anywhere and on any device. It must do so safely, securely, and with...

67

Digital diorama  

E-Print Network (OSTI)

Digital Diorama may be briefly presented as: a historical exploration of the vision devices, performances, and installations of the nineteenth century, and their influences on the project. These histories of the magic ...

Spikol, Daniel

1992-01-01T23:59:59.000Z

68

Terrain modeling with multifractional Brownian motion and self-regulating processes  

Science Conference Proceedings (OSTI)

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

Antoine Echelard; Jacques Lévy Véhel; Olivier Barrière

2010-09-01T23:59:59.000Z

69

Digital outcrop mapping of a reservoir-scale incised valley fill, Sego Sandstone, Book Cliffs, Utah  

E-Print Network (OSTI)

Outcrop analog studies have long been used to define subsurface correlation strategies and improve predictions of reservoir heterogeneities that can complicate production behavior. Recent advancements in geographic information software, 3D geologic modeling techniques, and survey equipment have the potential to revolutionize outcrop analog studies. A workflow is developed to create digital outcrop models using a reflectorless total station, a digital camera, Erdas Photogrammetry Module™, and Gocad™ to document complex stratal variations across kilometers-long outcrops. Combining outcrop digital elevation models with orthorectified photographs and detailed sedimentologic logs provides a framework for static 3D reservoir analog models. Developed methodologies are demonstrated by mapping rock variations and stratal geometries within several kilometers-long, sub-parallel exposures of the Lower Sego Sandstone in San Arroyo Canyon, Book Cliffs, Utah. The digital outcrop model of the Lower Sego Sandstone documents complex bedding geometry and facies distribution within two sharp-based sandstone layers. A mapping of allostratigraphic surfaces through the digital outcrop model provided a framework in which to analyze facies variations. These surfaces included: 1) Basal erosion surfaces of these layers interpreted to have formed by tidal erosion of the sea floor during shoreline regression; 2) a high relief erosion surface within the upper layer interpreted to have formed during lowstand fluvial incision; and 3) top contacts of layers defined by abrupt fining to marine shale, which are interpreted to record marine ravinement during transgression. Facies variations within the lower layer include low sinuosity distributary channel deposits incised into highly marine bioturbated sandstone. Deposits above the high-relief erosion surface within the upper layer are a classic valley fill succession, which processes upward from lowstand fluvial channel deposits, to heterolithic estuarine deposits, and finally to sandy landward-dipping beds of an estuarine mouth shoal deposit. The digital outcrop model allows surfaces and facies observation to be mapped within a structured 3D coordinate system to define reservoir analog models.

Fey, Matthew F.

2006-08-01T23:59:59.000Z

70

Digital Bangladesh: a change we can believe in?  

Science Conference Proceedings (OSTI)

Turning Bangladesh, one of the world's least developed countries, into a digitally developed nation by 2021 was one of the main electoral pledges of the present government. This vision, widely known as 'Digital Bangladesh', has contributed to a decisive ... Keywords: ICTs, digital access model, digital bangladesh, national ICT policy 2009

M. Sirajul Islam; Åke Grönlund

2011-08-01T23:59:59.000Z

71

Microstructure and Property Evolution in Advanced Cladding and Duct Materials Under Long-Term and Elevated Temperature Irradiation: Modeling and Experimental Inbestigation  

Science Conference Proceedings (OSTI)

The in-service degradation of reactor core materials is related to underlying changes in the irradiated microstructure. During reactor operation, structural components and cladding experience displacement of atoms by collisions with neutrons at temperatures at which the radiation-induced defects are mobile, leading to microstructure evolution under irradiation that can degrade material properties. At the doses and temperatures relevant to fast reactor operation, the microstructure evolves by dislocation loop formation and growth, microchemistry changes due to radiation-induced segregation, radiation-induced precipitation, destabilization of the existing precipitate structure, and in some cases, void formation and growth. These processes do not occur independently; rather, their evolution is highly interlinked. Radiationinduced segregation of Cr and existing chromium carbide coverage in irradiated alloy T91 track each other closely. The radiation-induced precipitation of Ni-Si precipitates and RIS of Ni and Si in alloys T91 and HCM12A are likely related. Neither the evolution of these processes nor their coupling is understood under the conditions required for materials performance in fast reactors (temperature range 300-600°C and doses beyond 200 dpa). Further, predictive modeling is not yet possible as models for microstructure evolution must be developed along with experiments to characterize these key processes and provide tools for extrapolation. To extend the range of operation of nuclear fuel cladding and structural materials in advanced nuclear energy and transmutation systems to that required for the fast reactor, the irradiation-induced evolution of the microstructure, microchemistry, and the associated mechanical properties at relevant temperatures and doses must be understood. Predictive modeling relies on an understanding of the physical processes and also on the development of microstructure and microchemical models to describe their evolution under irradiation. This project will focus on modeling microstructural and microchemical evolution of irradiated alloys by performing detailed modeling of such microstructure evolution processes coupled with well-designed in situ experiments that can provide validation and benchmarking to the computer codes. The broad scientific and technical objectives of this proposal are to evaluate the microstructure and microchemical evolution in advanced ferritic/martensitic and oxide dispersion strengthened (ODS) alloys for cladding and duct reactor materials under long-term and elevated temperature irradiation, leading to improved ability to model structural materials performance and lifetime. Specifically, we propose four research thrusts, namely Thrust 1: Identify the formation mechanism and evolution for dislocation loops with Burgers vector of a and determine whether the defect microstructure (predominately dislocation loop/dislocation density) saturates at high dose. Thrust 2: Identify whether a threshold irradiation temperature or dose exists for the nucleation of growing voids that mark the beginning of irradiation-induced swelling, and begin to probe the limits of thermal stability of the tempered Martensitic structure under irradiation. Thrust 3: Evaluate the stability of nanometer sized Y- Ti-O based oxide dispersion strengthened (ODS) particles at high fluence/temperature. Thrust 4: Evaluate the extent to which precipitates form and/or dissolve as a function of irradiation temperature and dose, and how these changes are driven by radiation induced segregation and microchemical evolutions and determined by the initial microstructure.

Wirth, Brian; Morgan, Dane; Kaoumi, Djamel; Motta, Arthur

2013-12-01T23:59:59.000Z

72

Microstructure and Property Evolution in Advanced Cladding and Duct Materials Under Long-Term and Elevated Temperature Irradiation: Modeling and Experimental Inbestigation  

SciTech Connect

The in-service degradation of reactor core materials is related to underlying changes in the irradiated microstructure. During reactor operation, structural components and cladding experience displacement of atoms by collisions with neutrons at temperatures at which the radiation-induced defects are mobile, leading to microstructure evolution under irradiation that can degrade material properties. At the doses and temperatures relevant to fast reactor operation, the microstructure evolves by dislocation loop formation and growth, microchemistry changes due to radiation-induced segregation, radiation-induced precipitation, destabilization of the existing precipitate structure, and in some cases, void formation and growth. These processes do not occur independently; rather, their evolution is highly interlinked. Radiationinduced segregation of Cr and existing chromium carbide coverage in irradiated alloy T91 track each other closely. The radiation-induced precipitation of Ni-Si precipitates and RIS of Ni and Si in alloys T91 and HCM12A are likely related. Neither the evolution of these processes nor their coupling is understood under the conditions required for materials performance in fast reactors (temperature range 300-600°C and doses beyond 200 dpa). Further, predictive modeling is not yet possible as models for microstructure evolution must be developed along with experiments to characterize these key processes and provide tools for extrapolation. To extend the range of operation of nuclear fuel cladding and structural materials in advanced nuclear energy and transmutation systems to that required for the fast reactor, the irradiation-induced evolution of the microstructure, microchemistry, and the associated mechanical properties at relevant temperatures and doses must be understood. Predictive modeling relies on an understanding of the physical processes and also on the development of microstructure and microchemical models to describe their evolution under irradiation. This project will focus on modeling microstructural and microchemical evolution of irradiated alloys by performing detailed modeling of such microstructure evolution processes coupled with well-designed in situ experiments that can provide validation and benchmarking to the computer codes. The broad scientific and technical objectives of this proposal are to evaluate the microstructure and microchemical evolution in advanced ferritic/martensitic and oxide dispersion strengthened (ODS) alloys for cladding and duct reactor materials under long-term and elevated temperature irradiation, leading to improved ability to model structural materials performance and lifetime. Specifically, we propose four research thrusts, namely Thrust 1: Identify the formation mechanism and evolution for dislocation loops with Burgers vector of a<100> and determine whether the defect microstructure (predominately dislocation loop/dislocation density) saturates at high dose. Thrust 2: Identify whether a threshold irradiation temperature or dose exists for the nucleation of growing voids that mark the beginning of irradiation-induced swelling, and begin to probe the limits of thermal stability of the tempered Martensitic structure under irradiation. Thrust 3: Evaluate the stability of nanometer sized Y- Ti-O based oxide dispersion strengthened (ODS) particles at high fluence/temperature. Thrust 4: Evaluate the extent to which precipitates form and/or dissolve as a function of irradiation temperature and dose, and how these changes are driven by radiation induced segregation and microchemical evolutions and determined by the initial microstructure.

Wirth, Brian; Morgan, Dane; Kaoumi, Djamel; Motta, Arthur

2013-12-01T23:59:59.000Z

73

Preserving digital information forever  

Science Conference Proceedings (OSTI)

Well within our lifetime we can expect to see most information being created, stored and used digitally. Despite the growing importance of digital data, the wider community pays almost no attention to the problems of preserving this digital information ... Keywords: archiving, digital preservation

Andrew Waugh; Ross Wilkinson; Brendan Hills; Jon Dell'oro

2000-06-01T23:59:59.000Z

74

MODELING THE IMPACT OF ELEVATED MERCURY IN DEFENSE WASTE PROCESSING FACILITY MELTER FEED ON THE MELTER OFF-GAS SYSTEM - PRELIMINARY REPORT  

SciTech Connect

The Defense Waste Processing Facility (DWPF) is currently evaluating an alternative Chemical Process Cell (CPC) flowsheet to increase throughput. It includes removal of the steam-stripping step, which would significantly reduce the CPC processing time and lessen the sampling needs. However, its downside would be to send 100% of the mercury that come in with the sludge straight to the melter. For example, the new mercury content in the Sludge Batch 5 (SB5) melter feed is projected to be 25 times higher than that in the SB4 with nominal steam stripping of mercury. This task was initiated to study the impact of the worst-case scenario of zero-mercury-removal in the CPC on the DWPF melter off-gas system. It is stressed that this study is intended to be scoping in nature, so the results presented in this report are preliminary. In order to study the impact of elevated mercury levels in the feed, it is necessary to be able to predict how mercury would speciate in the melter exhaust under varying melter operating conditions. A homogeneous gas-phase oxidation model of mercury by chloride was developed to do just that. The model contains two critical parameters pertaining to the partitioning of chloride among HCl, Cl, Cl{sub 2}, and chloride salts in the melter vapor space. The values for these parameters were determined at two different melter vapor space temperatures by matching the calculated molar ratio of HgCl (or Hg{sub 2}Cl{sub 2}) to HgCl{sub 2} with those measured during the Experimental-Scale Ceramic Melter (ESCM) tests run at the Pacific Northwest National Laboratory (PNNL). The calibrated model was then applied to the SB5 simulant used in the earlier flowsheet study with an assumed mercury stripping efficiency of zero; the molar ratio of Cl-to-Hg in the resulting melter feed was only 0.4, compared to 12 for the ESCM feeds. The results of the model run at the indicated melter vapor space temperature of 650 C (TI4085D) showed that due to excessive shortage of chloride, only 6% of the mercury fed is expected to get oxidized, mostly as HgCl, while the remaining mercury would exist either as elemental mercury vapor (90%) or HgO (4%). Noting that the measured chloride level in the SB5 qualification sample was an order of magnitude lower than that used in the SB5 simulant, the degree of chloride shortage will be even greater. As a result, the projected level of HgCl in the actual SB5 melter exhaust will be even lower than 6% of the total mercury fed, while that of elemental mercury is likely to be greater than 90%. The homogeneous oxidation of mercury in the off-gas was deemed to be of primary importance based on the postulation that mercury and other volatile salts form submicron sized aerosols upon condensation and thus remain largely in the gas stream downstream of the quencher where they can deposit in the off-gas lines, Steam-Atomized Scrubbers (SAS), and High-Efficiency Mist Eliminator (HEME). Formation of these submicron semi-volatile salts in the condensate liquid is considered to be unlikely, so the liquid phase reactions were considered to be less important. However, subsequent oxidation of mercury in the liquid phase in the off-gas system was examined in a simplified model of the off-gas condensate. It was found that the condensate chemistry was consistent with further oxidation of elemental mercury to Hg{sub 2}Cl{sub 2} and conversion of HgO to chlorides. The results were consistent with the available experimental data. It should also be noted that the model predictions presented in this report do not include any physically entrained solids, which typically account for much of the off-gas carryover on a mass basis. The high elemental mercury vapor content predicted at the DWPF Quencher inlet means that physically entrained solids could provide the necessary surface onto which elemental mercury vapor could condense, thereby coating the solids as well as the internal surfaces of the off-gas system with mercury. Clearly, there are many process benefits to be gained by removing the steam-stripping step from the CPC c

Zamecnik, J.; Choi, A.

2009-03-25T23:59:59.000Z

75

MODELING THE IMPACT OF ELEVATED MERCURY IN DEFENSE WASTE PROCESSING FACILITY MELTER FEED ON THE MELTER OFF-GAS SYSTEM-PRELIMINARY REPORT  

SciTech Connect

The Defense Waste Processing Facility (DWPF) is currently evaluating an alternative Chemical Process Cell (CPC) flowsheet to increase throughput. It includes removal of the steam-stripping step, which would significantly reduce the CPC processing time and lessen the sampling needs. However, its downside would be to send 100% of the mercury that comes in with the sludge straight to the melter. For example, the new mercury content in the Sludge Batch 5 (SB5) melter feed is projected to be 25 times higher than that in the SB4 with nominal steam stripping of mercury. This task was initiated to study the impact of the worst-case scenario of zero-mercury-removal in the CPC on the DWPF melter offgas system. It is stressed that this study is intended to be scoping in nature, so the results presented in this report are preliminary. In order to study the impact of elevated mercury levels in the feed, it is necessary to be able to predict how mercury would speciate in the melter exhaust under varying melter operating conditions. A homogeneous gas-phase oxidation model of mercury by chloride was developed to do just that. The model contains two critical parameters pertaining to the partitioning of chloride among HCl, Cl, Cl{sub 2}, and chloride salts in the melter vapor space. The values for these parameters were determined at two different melter vapor space temperatures by matching the calculated molar ratio of HgCl (or Hg{sub 2}Cl{sub 2}) to HgCl{sub 2} with those measured during the Experimental-Scale Ceramic Melter (ESCM) tests run at the Pacific Northwest National Laboratory (PNNL). The calibrated model was then applied to the SB5 simulant used in the earlier flowsheet study with an assumed mercury stripping efficiency of zero; the molar ratio of Cl-to-Hg in the resulting melter feed was only 0.4, compared to 12 for the ESCM feeds. The results of the model run at the indicated melter vapor space temperature of 650 C (TI4085D) showed that due to excessive shortage of chloride, only 6% of the mercury fed is expected to get oxidized, mostly as HgCl, while the remaining mercury would exist either as elemental mercury vapor (90%) or HgO (4%). Noting that the measured chloride level in the SB5 qualification sample was an order of magnitude lower than that used in the SB5 simulant, the degree of chloride shortage will be even greater. As a result, the projected level of HgCl in the actual SB5 melter exhaust will be even lower than 6% of the total mercury fed, while that of elemental mercury is likely to be greater than 90%. The homogeneous oxidation of mercury in the off-gas was deemed to be of primary importance based on the postulation that mercury and other volatile salts form submicron sized aerosols upon condensation and thus remain largely in the gas stream downstream of the quencher where they can deposit in the off-gas lines, Steam-Atomized Scrubbers (SAS), and High-Efficiency Mist Eliminator (HEME). Formation of these submicron semi-volatile salts in the condensate liquid is considered to be unlikely, so the liquid phase reactions were considered to be less important. However, subsequent oxidation of mercury in the liquid phase in the off-gas system was examined in a simplified model of the off-gas condensate. It was found that the condensate chemistry was consistent with further oxidation of elemental mercury to Hg{sub 2}Cl{sub 2} and conversion of HgO to chlorides. The results were consistent with the available experimental data. It should also be noted that the model predictions presented in this report do not include any physically entrained solids, which typically account for much of the off-gas carryover on a mass basis. The high elemental mercury vapor content predicted at the DWPF Quencher inlet means that physically entrained solids could provide the necessary surface onto which elemental mercury vapor could condense, thereby coating the solids as well as the internal surfaces of the off-gas system with mercury. Clearly, there are many process benefits to be gained by removing the steam-stripping step from the CPC c

Zamecnik, J.; Choi, A.

2010-08-18T23:59:59.000Z

76

Digital Sensor Technology  

SciTech Connect

The nuclear industry has been slow to incorporate digital sensor technology into nuclear plant designs due to concerns with digital qualification issues. However, the benefits of digital sensor technology for nuclear plant instrumentation are substantial in terms of accuracy, reliability, availability, and maintainability. This report demonstrates these benefits in direct comparisons of digital and analog sensor applications. It also addresses the qualification issues that must be addressed in the application of digital sensor technology.

Ted Quinn; Jerry Mauck; Richard Bockhorst; Ken Thomas

2013-07-01T23:59:59.000Z

77

Improving Water Management: Applying ModelBuilder to site water impoundments using AEM survey data  

Science Conference Proceedings (OSTI)

ArcGIS ModelBuilder was used to create a GIS-based decision support model that incorporated digital elevation data and electromagnetic geophysical results gathered by helicopter to screen potential sites for water disposal impoundments produced from coal bed natural gas.

Sams, J.I.; Lipinski, B.A.; Harbert, W.P.; Ackman, T.E.

2007-01-01T23:59:59.000Z

78

MBD Driven Digital Product Collaborative Definition Technology  

Science Conference Proceedings (OSTI)

Recording and exchanging the collaborative product definition information is an important aspect of digital product collaborative development process. To resolve the problem of records the product collaborative definition information, promote the implementation ... Keywords: digital product definition, MBD, collaboration, product manufacturing information, integrated model

QiuZhong Zhou; QingChun Fan

2010-11-01T23:59:59.000Z

79

Digital Identities | Department of Energy  

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

Digital Identities Digital Identities Public Key Infrastructure (PKI) is a comprehensive system that provides public-key encryption and digital signature services across a wide...

80

GIS-based modeling of secondary hydrocarbon migration pathways and its application in the northern Songliao Basin, northeast China  

Science Conference Proceedings (OSTI)

Hydrocarbon migration pathways are the linkage between hydrocarbon source areas and accumulation sites. Modeling accurately the pathways of hydrocarbon migration is of important significance in determining the location of favorable petroleum exploration ... Keywords: Digital elevation model (DEM), Geographic information system (GIS), Migration pathway, Oil and gas-bearing basin, Visualization

Xuefeng Liu; Guangfa Zhong; Jingyuan Yin; Youbin He; Xianhua Li

2008-09-01T23:59:59.000Z

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


81

A digital rock density map of New Zealand  

Science Conference Proceedings (OSTI)

Digital geological maps of New Zealand (QMAP) are combined with 9256 samples with rock density measurements from the national rock catalogue PETLAB and supplementary geological sources to generate a first digital density model of New Zealand. This digital ... Keywords: Crust, Database, Density, Geological mapping, Gravimetry, Rock types

Robert Tenzer; Pascal Sirguey; Mark Rattenbury; Julia Nicolson

2011-08-01T23:59:59.000Z

82

Monitoring the Coupling-Update Frequency of a Limited-Area Model by Means of a Recursive Digital Filter  

Science Conference Proceedings (OSTI)

In operational applications lateral-boundary coupling data are provided to one-way nested limited-area models with time intervals of more than an order of magnitude larger than the time step of the coupled model. In practice, these fixed coupling-...

Piet Termonia

2004-08-01T23:59:59.000Z

83

Elevated Transportation Company  

E-Print Network (OSTI)

Being stuck in traffic doesn’t have to be a way of life. By approving citizens Initiative 53, Seattle voters asked for an alternative to traffic congestion through a new, expanded monorail system that would speed travelers up and over the cars below. The Elevated Transportation Company was asked to plan the new monorail and develop a proposal to build it. This document, the ETC Seattle Popular Monorail Plan, is our response. In it, we call for the creation of a 5-line, 58-mile citywide monorail system, and present a detailed proposal for the first line to be built, the 14-mile Green Line from Ballard and West Seattle to Downtown. The Plan includes a proposed route for the Green Line as well as cost, revenue, and ridership estimates, together with a proposal to fund Green Line construction and start-up. As we present this Plan today, we do so with great enthusiasm for the promise of monorail transportation in 21st century Seattle. A monorail system will give us a fast, elevated alternative to traffic congestion, and seamless mobility between Downtown and the neighborhoods. It will be safe, separated from cars and pedestrians. And it will be good for the environment, with its nonpolluting electric cars running quietly along the guideway beams. Our work has undergone extensive public review and comment as well as rigorous technical analysis from independent experts. The Plan has been refined and strengthened over the months and we are confident that it not only proposes a viable and efficient

Kristina Hill; Board Vice-chair; Donald King; Jeanne Kohl-welles

2002-01-01T23:59:59.000Z

84

Panel on digital preservation  

Science Conference Proceedings (OSTI)

Digital information in any form is at risk. Software and hardware become obsolete, and versions and file formats change, making data inaccessible. Data stored in even the simplest form are in danger due to computer media degradation and obsolescence. ... Keywords: archival systems, digital libraries, digital preservation, metadata

Joyce Ray; Robin Dale; Reagan Moore; Vicky Reich; William Underwood; Alexa T. McCray

2002-07-01T23:59:59.000Z

85

NIST Forensic Science -- Digital Evidence  

Science Conference Proceedings (OSTI)

... Sign up to receive news about NIST Forensic Science. *Email Address. ... NIST Forensic Science -- Digital Evidence. Digital ...

2013-09-13T23:59:59.000Z

86

Digital fabrication in the architectural design process  

E-Print Network (OSTI)

Digital fabrication is affecting the architectural design process due to the increasingly important role it has in the fabrication of architectural models. Many design professionals, professors, and students have experienced ...

Seely, Jennifer C. K., 1975-

2004-01-01T23:59:59.000Z

87

Forest succession at elevated CO2  

DOE Green Energy (OSTI)

We tested hypotheses concerning the response of forest succession to elevated CO2 in the FACTS-1 site at the Duke Forest. We quantified growth and survival of naturally recruited seedlings, tree saplings, vines, and shrubs under ambient and elevated CO2. We planted seeds and seedlings to augment sample sites. We augmented CO2 treatments with estimates of shade tolerance and nutrient limitation while controlling for soil and light effects to place CO2 treatments within the context of natural variability at the site. Results are now being analyzed and used to parameterize forest models of CO2 response.

Clark, James S.; Schlesinger, William H.

2002-02-01T23:59:59.000Z

88

U-084: Cisco Digital Media Manager Lets Remote Authenticated Users Gain  

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

84: Cisco Digital Media Manager Lets Remote Authenticated Users 84: Cisco Digital Media Manager Lets Remote Authenticated Users Gain Elevated Privileges U-084: Cisco Digital Media Manager Lets Remote Authenticated Users Gain Elevated Privileges January 19, 2012 - 9:00am Addthis PROBLEM: A remote authenticated user can gain elevated privileges on the target system. PLATFORM: Cisco Digital Media Manager: Version(s) 5.22 and prior, 5.2.3 ABSTRACT: The system does not properly validate unreferenced URLs. REFERENCE LINKS: Vendor Advisory SecurityTracker Alert ID: 1026541 CVE-2012-0329 IMPACT ASSESSMENT: medium Discussion: Cisco Show and Share is not directly affected by this vulnerability, but a user can exploit the Cisco Digital Media Manager to gain full access to Cisco Show and Share. Impact: A remote authenticated user can send a specially crafted URL via TCP port

89

U-084: Cisco Digital Media Manager Lets Remote Authenticated Users Gain  

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

4: Cisco Digital Media Manager Lets Remote Authenticated Users 4: Cisco Digital Media Manager Lets Remote Authenticated Users Gain Elevated Privileges U-084: Cisco Digital Media Manager Lets Remote Authenticated Users Gain Elevated Privileges January 19, 2012 - 9:00am Addthis PROBLEM: A remote authenticated user can gain elevated privileges on the target system. PLATFORM: Cisco Digital Media Manager: Version(s) 5.22 and prior, 5.2.3 ABSTRACT: The system does not properly validate unreferenced URLs. REFERENCE LINKS: Vendor Advisory SecurityTracker Alert ID: 1026541 CVE-2012-0329 IMPACT ASSESSMENT: medium Discussion: Cisco Show and Share is not directly affected by this vulnerability, but a user can exploit the Cisco Digital Media Manager to gain full access to Cisco Show and Share. Impact: A remote authenticated user can send a specially crafted URL via TCP port

90

Use of Elevators During Fires  

Science Conference Proceedings (OSTI)

... Smoke Control for Elevators. Klote, JH ASHRAE Journal, Vol. 26, No. 4, 23-33, April 1984. NBSIR 83-2715; 60 p. June 1983. ...

2013-11-26T23:59:59.000Z

91

On The Independence Of Digits In Connected Digit Strings  

E-Print Network (OSTI)

One of the frequently used assumptions in Speaker Verification is that two speech segments (phonemes, subwords, words) are considered to be independent. And therefore, the log-likelihood of a test utterance is just the sum of the log-likelihoods of the speech segments in that utterance. This paper reports about cases in which this observation-independence assumption seems to be violated, namely for those test utterances which call a certain speech model more than once. For example, a pin code which contains a non-unique digit set performs worse in verification than a pin code which consists of four different digits. Results illustrate that violating the independence assumption too much might result in increasing EERs while more information (in form of digits) is added to the test utterance. 1. INTRODUCTION In Speaker Verification (SV) systems using passwords in the form of fixed or prompted digit strings it seems usual to compute the log-likelihood of a claimant being the true speaker...

Johan Koolwaaij; Lou Boves

1995-01-01T23:59:59.000Z

92

Sensitivity of terrestrial ecosystems to elevated atmospheric CO{sub 2}: Comparisons of model simulation studies to CO{sub 2} effect  

Science Conference Proceedings (OSTI)

In the context of a project to compare terrestrial ecosystem models, the Vegetation/Ecosystem Modeling and Analysis Project (VEMAP), we have analyzed how three biogeochemistry models link plant growth to doubled atmospheric CO{sub 2}. A common set of input data was used to drive three biogeochemistry models, BIOME-BGC, CENTURY and TEM. For the continental United States the simulation results show that with doubled CO{sub 2}, NPP increased by 8.7%, 5.0% and 10.8% for TEM, CENTURY and BIOME-BGC, respectively. At the biome level the range of NPP estimates varied considerably among models. TEM-simulated enhancement of NPP ranged from 2% to 28%; CENTURY, from 2% to 9%; and BIOME-BGC, from 4% to 27%. A transect analysis across several biomes along a latitude at 41.5 N shows that the TEM-simulated CO{sub 2} enhancement of NPP ranged from 0% to 22%; CENTURY, from 1% to 10% and BIOME-BGC, from 1% to 63%. In this study, we have investigated the underlying mechanisms of the three models to reveal how increased CO{sub 2} affects photosynthesis rate, water using efficiency and nutrient cycles. The relative importance of these mechanisms in each of the three biogeochemistry models will be discussed.

Pan, Y. [Marine Biological Lab., Woods Hole, MA (United States)

1995-06-01T23:59:59.000Z

93

Dynamics of Elevated Vortices  

Science Conference Proceedings (OSTI)

Theoretical hydrodynamic models for the behavior of vortices with axially varying rotation rates are presented. The flows are inviscid, axisymmetric, and incompressible. Two flow classes are considered: (i) radially unbounded solid body–type ...

Alan Shapiro; Paul Markowski

1999-05-01T23:59:59.000Z

94

Digital Jordan curve theorems  

E-Print Network (OSTI)

Abstract. Efim Khalimsky’s digital Jordan curve theorem states that the complement of a Jordan curve in the digital plane equipped with the Khalimsky topology has exactly two connectivity components. We present a new, short proof of this theorem using induction on the Euclidean length of the curve. We also prove that the theorem holds with another topology on the digital plane but then only for a restricted class of Jordan curves. 1

Christer O. Kiselman

2000-01-01T23:59:59.000Z

95

Digitization Best Practices  

SciTech Connect

This project involved performing tests and documenting results to determine best practices for digitizing older print documents. The digitization process is complicated, especially when original documents exhibit non-standard fonts and are faded. Tests focused on solutions to improve high quality scanning, increase OCR accuracy, and efficiently use embedded metadata. Results are summarized. From the test results on the right sides, we know that when we plan to digitize documents, we should balance Quantity and Quality based on our expectation, and then make final decision for the digitization process.

Xue, Fei [Los Alamos National Laboratory; Holtkamp, Irma S. [Los Alamos National Laboratory; Knudson, Frances L. [Los Alamos National Laboratory

2012-07-31T23:59:59.000Z

96

Digital Media Quality  

Science Conference Proceedings (OSTI)

... video. This work was reported to the 2004 SPIE Conference on Applications of Digital Image Processing XXVII. SubjectiveAssessMethodsForMPEG ...

2010-10-05T23:59:59.000Z

97

Adaptive cooling of integrated circuits using digital microfluidics  

Science Conference Proceedings (OSTI)

Thermal management is critical for integrated circuit (IC) design. With each new IC technology generation, feature sizes decrease, while operating speeds and package densities increase. These factors contribute to elevated die temperatures detrimental ... Keywords: adaptive cooling, chip cooling, digital microfluidics, electrowetting, hot-spot cooling, microfluidics

Philip Y. Paik; Vamsee K. Pamula; Krishnendu Chakrabarty

2008-04-01T23:59:59.000Z

98

Application of linear multiple model predictive control (MMPC) framework towards dynamic maximazation of oxygen yield in an elevated-pressure air separation unit  

SciTech Connect

In a typical air separation unit (ASU) utilizing either a simple gaseous oxygen (GOX) cycle or a pumped liquid oxygen (PLOX) cycle, the flowrate of liquid nitrogen (LN2) stream connecting high-pressure and low-pressure ASU columns plays an important role in the total oxygen yield. It has been observed that this yield reaches a maximum at a certain optimal flowrate of LN2 stream. At nominal full-load operation, the flowrate of LN2 stream is maintained near this optimum value, whereas at part-load conditions this flowrate is typically modified in proportion with the load-change (oxygen demand) through a ratio/feed-forward controller. Due to nonlinearity in the entire ASU process, the ratio-modified LN2 flowrate does not guarantee an optimal oxygen yield at part-load conditions. This is further exacerbated when process disturbances in form of “cold-box” heat-leaks enter the system. To address this problem of dynamically maximizing the oxygen yield while the ASU undergoes a load-change and/or a process disturbance, a multiple model predictive control (MMPC) algorithm is proposed. This approach has been used in previous studies to handle large ramp-rates of oxygen demand posed by the gasifier in an IGCC plant. In this study, the proposed algorithm uses linear step-response “blackbox” models surrounding the operating points corresponding to maximum oxygen yield points at different loads. It has been shown that at any operating point of the ASU, the MMPC algorithm, through model-weight calculation based on plant measurements, naturally and continuously selects the dominant model(s) corresponding to the current plant state, while making control-move decisions that approach the maximum oxygen yield point. This dynamically facilitates less energy consumption in form of compressed feed-air compared to a simple ratio control during load-swings. In addition, since a linear optimization problem is solved at each time step, the approach involves much less computational cost compared to a firstprinciple based nonlinear MPC. Introduction

Mahapatra, P.; Zitney, S.; Bequette, B. Wayne

2012-01-01T23:59:59.000Z

99

Data visualisation in digital forensics.  

E-Print Network (OSTI)

??As digital crimes have risen, so has the need for digital forensics. Numerous state-of-the-art tools have been developed to assist digital investigators conduct proper investigations… (more)

Fei, Bennie Kar Leung

2007-01-01T23:59:59.000Z

100

Parallel digital forensics infrastructure.  

Science Conference Proceedings (OSTI)

This report documents the architecture and implementation of a Parallel Digital Forensics infrastructure. This infrastructure is necessary for supporting the design, implementation, and testing of new classes of parallel digital forensics tools. Digital Forensics has become extremely difficult with data sets of one terabyte and larger. The only way to overcome the processing time of these large sets is to identify and develop new parallel algorithms for performing the analysis. To support algorithm research, a flexible base infrastructure is required. A candidate architecture for this base infrastructure was designed, instantiated, and tested by this project, in collaboration with New Mexico Tech. Previous infrastructures were not designed and built specifically for the development and testing of parallel algorithms. With the size of forensics data sets only expected to increase significantly, this type of infrastructure support is necessary for continued research in parallel digital forensics. This report documents the implementation of the parallel digital forensics (PDF) infrastructure architecture and implementation.

Liebrock, Lorie M. (New Mexico Tech, Socorro, NM); Duggan, David Patrick

2009-10-01T23:59:59.000Z

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


101

Fast transient digitizer  

DOE Patents (OSTI)

Method and apparatus for sequentially scanning a plurality of target elements with an electron scanning beam modulated in accordance with variations in a high-frequency analog signal to provide discrete analog signal samples representative of successive portions of the analog signal; coupling the discrete analog signal samples from each of the target elements to a different one of a plurality of high speed storage devices; converting the discrete analog signal samples to equivalent digital signals; and storing the digital signals in a digital memory unit for subsequent measurement or display.

Villa, Francesco (Palo Alto, CA)

1982-01-01T23:59:59.000Z

102

Digital sonar system  

DOE Patents (OSTI)

A transponder of an active digital sonar system identifies a multifrequency underwater activating sonar signal received from a remote sonar transmitter. The transponder includes a transducer that receives acoustic waves, including the activating sonar signal, and generates an analog electrical receipt signal. The analog electrical receipt signal is converted to a digital receipt signal and cross-correlated with a digital transmission signal pattern corresponding to the activating sonar signal. A relative peak in the cross-correlation value is indicative of the activating sonar signal having been received by the transponder. In response to identifying the activating sonar signal, the transponder transmits a responding multifrequency sonar signal. 4 figs.

Young, K.K.; Wilkes, R.J.

1995-11-21T23:59:59.000Z

103

Digital sonar system  

DOE Patents (OSTI)

A transponder of an active digital sonar system identifies a multifrequency underwater activating sonar signal received from a remote sonar transmitter. The transponder includes a transducer that receives acoustic waves, including the activating sonar signal, and generates an analog electrical receipt signal. The analog electrical receipt signal is converted to a digital receipt signal and cross-correlated with a digital transmission signal pattern corresponding to the activating sonar signal. A relative peak in the cross-correlation value is indicative of the activating sonar signal having been received by the transponder. In response to identifying the activating sonar signal, the transponder transmits a responding multifrequency sonar signal.

Young, Kenneth K. (Seattle, WA); Wilkes, R. Jeffrey (Seattle, WA)

1995-01-01T23:59:59.000Z

104

Representing digital assets usingMPEG-21 Digital Item Declaration  

Science Conference Proceedings (OSTI)

Various XML-based approaches aimed at representing compound digital assets have emerged over the last several years. Approaches that are of specific relevance to the digital library community include the Metadata Encoding and Transmission Standard (METS), ... Keywords: Digital Item, Digital asset, MPEG-21 DID, OAI-PMH, OpenURL

Jeroen Bekaert; Emiel De Kooning; Herbert de Sompel

2006-04-01T23:59:59.000Z

105

Digital Image Authentication: A Review  

Science Conference Proceedings (OSTI)

Digital image authentication refers to all the techniques performing anti-falsification, digital image copyright protection, or access control. A large number of DIA techniques have been developed to authenticate digital images, including cryptography-based ... Keywords: Data Hiding, Digital Fingerprints, Forensic Science, Image Authentication, Watermarking

Chia-Hung Wei; Yue Li

2011-04-01T23:59:59.000Z

106

Sloan digital sky survey  

SciTech Connect

The Sloan Digital Sky Survey will produce a detailed digital photometric map of half the northern sky to about 23 magnitude using a special purpose wide field 2.5 meter telescope. From this map we will select {approximately} 10{sup 6} galaxies and 10{sup 5} quasars, and obtain high resolution spectra using the same telescope. The imaging catalog will contain 10{sup 8} galaxies, a similar number of stars, and 10{sup 6} quasar candidates.

Kent, S.M.; Stoughton, C.; Newberg, H.; Loveday, J.; Petravick, D.; Gurbani, V.; Berman, E.; Sergey, G. [Fermi National Accelerator Lab., Batavia, IL (United States); Lupton, R. [Princeton Univ., NJ (United States)

1994-04-01T23:59:59.000Z

107

Marathon pacing and elevation change  

E-Print Network (OSTI)

An analysis of marathon pacing and elevation change is presented. It is based on an empirical observation of how the pace of elite and non-elite marathon runners change over the course of the marathon and a simple approximation of the energy cost of ascent and decent. It was observed that the pace of the runners slowed in a regular manner that could be broken up into four regions. That observation can be used to project target paces for a desired marathon finish time. However, that estimate fails to take in to account the energetic costs of elevation changes (hills) along the marathon course. Several approximations are made to give a coarse estimate of target paces for marathon run on courses with significant elevation changes, i.e. a hilly course. The 2012 Oakland Marathon course is used as and example of a hilly course and the times of 23 finishers are examined.

Elliott, J B

2012-01-01T23:59:59.000Z

108

Special Issue: High Elevation Forests  

E-Print Network (OSTI)

Resources, Colorado State University William Ciesla, Aerial Survey Coordinator, U.S. Forest Service (retired material for homes. They also capture, purify, and release water for our use. Recent aerial surveys confirmSpecial Issue: High Elevation Forests 2008 The Health of Colorado's Forests Report #12;David A

109

Transistor sizing for large combinational digital CMOS circuits  

Science Conference Proceedings (OSTI)

This article describes a new method to determine the device sizes of combinational digital CMOS circuits for an upper limit on the signal propagation delays. By modeling gate delay and area or power consumption of a circuit as a simple analytical function ... Keywords: Transistor sizing, digital combinational CMOS circuits, timing optimization

Lucas S. Heusler; Wolfgang Fichtner

1991-01-01T23:59:59.000Z

110

Optimization of a dual-energy contrast-enhanced technique for a photon-counting digital breast tomosynthesis system: I. A theoretical model  

SciTech Connect

Purpose: Dual-energy (DE) iodine contrast-enhanced x-ray imaging of the breast has been shown to identify cancers that would otherwise be mammographically occult. In this article, theoretical modeling was performed to obtain optimally enhanced iodine images for a photon-counting digital breast tomosynthesis (DBT) system using a DE acquisition technique. Methods: In the system examined, the breast is scanned with a multislit prepatient collimator aligned with a multidetector camera. Each detector collects a projection image at a unique angle during the scan. Low-energy (LE) and high-energy (HE) projection images are acquired simultaneously in a single scan by covering alternate collimator slits with Sn and Cu filters, respectively. Sn filters ranging from 0.08 to 0.22 mm thickness and Cu filters from 0.11 to 0.27 mm thickness were investigated. A tube voltage of 49 kV was selected. Tomographic images, hereafter referred to as DBT images, were reconstructed using a shift-and-add algorithm. Iodine-enhanced DBT images were acquired by performing a weighted logarithmic subtraction of the HE and LE DBT images. The DE technique was evaluated for 20-80 mm thick breasts. Weighting factors, w{sub t}, that optimally cancel breast tissue were computed. Signal-difference-to-noise ratios (SDNRs) between iodine-enhanced and nonenhanced breast tissue normalized to the square root of the mean glandular dose (MGD) were computed as a function of the fraction of the MGD allocated to the HE images. Peak SDNR/{radical}(MGD) and optimal dose allocations were identified. SDNR/{radical}(MGD) and dose allocations were computed for several practical feasible system configurations (i.e., determined by the number of collimator slits covered by Sn and Cu). A practical system configuration and Sn-Cu filter pair that accounts for the trade-off between SDNR, tube-output, and MGD were selected. Results: w{sub t} depends on the Sn-Cu filter combination used, as well as on the breast thickness; to optimally cancel 0% with 50% glandular breast tissue, w{sub t} values were found to range from 0.46 to 0.72 for all breast thicknesses and Sn-Cu filter pairs studied. The optimal w{sub t} values needed to cancel all possible breast tissue glandularites vary by less than 1% for 20 mm thick breasts and 18% for 80 mm breasts. The system configuration where one collimator slit covered by Sn is alternated with two collimator slits covered by Cu delivers SDNR/{radical}(MGD) nearest to the peak value. A reasonable compromise is a 0.16 mm Sn-0.23 mm Cu filter pair, resulting in SDNR values between 1.64 and 0.61 and MGD between 0.70 and 0.53 mGy for 20-80 mm thick breasts at the maximum tube current. Conclusions: A DE acquisition technique for a photon-counting DBT imaging system has been developed and optimized.

Carton, Ann-Katherine; Ullberg, Christer; Lindman, Karin; Acciavatti, Raymond; Francke, Tom; Maidment, Andrew D. A. [University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States); XCounter AB, Svaerdvaegen 11, SE-182 33 Danderyd (Sweden); University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States); XCounter AB, Svaerdvaegen 11, SE-182 33 Danderyd (Sweden); University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)

2010-11-15T23:59:59.000Z

111

Digital optical conversion module  

DOE Patents (OSTI)

A digital optical conversion module used to convert an analog signal to a computer compatible digital signal including a voltage-to-frequency converter, frequency offset response circuitry, and an electrical-to-optical converter. Also used in conjunction with the digital optical conversion module is an optical link and an interface at the computer for converting the optical signal back to an electrical signal. Suitable for use in hostile environments having high levels of electromagnetic interference, the conversion module retains high resolution of the analog signal while eliminating the potential for errors due to noise and interference. The module can be used to link analog output scientific equipment such as an electrometer used with a mass spectrometer to a computer.

Kotter, Dale K. (North Shelley, ID); Rankin, Richard A. (Ammon, ID)

1991-02-26T23:59:59.000Z

112

Digital optical conversion module  

DOE Patents (OSTI)

A digital optical conversion module used to convert an analog signal to a computer compatible digital signal including a voltage-to-frequency converter, frequency offset response circuitry, and an electrical-to-optical converter. Also used in conjunction with the digital optical conversion module is an optical link and an interface at the computer for converting the optical signal back to an electrical signal. Suitable for use in hostile environments having high levels of electromagnetic interference, the conversion module retains high resolution of the analog signal while eliminating the potential for errors due to noise and interference. The module can be used to link analog output scientific equipment such as an electrometer used with a mass spectrometer to a computer. 2 figs.

Kotter, D.K.; Rankin, R.A.

1988-07-19T23:59:59.000Z

113

Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques  

Open Energy Info (EERE)

Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques '02- Workshop Proceedings Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Digital Geologic Field Mapping Using Arcpad, In: Digital Mapping Techniques '02- Workshop Proceedings Abstract Research into the practicality of digital mapping by Placer Dome Exploration identified hardware and software solutions to enhance the efficiency and accuracy of field work. The goal of the research was to find a lightweight hardware-software system that allows the user to build a digital map from field observations in much the same way as pen and paper methods. The focus of the research was to minimize the size and weight of computer systems. Systems identified consist of a wearable PC or handheld

114

The Open Digital Rights Language: XML for Digital Rights Management  

Science Conference Proceedings (OSTI)

Digital Rights Management (DRM) covers a broad area of intellectual property management and enforcement. DRM aims to provide secure and trusted services to control the use and distribution of content. DRM technologies have evolved from the primarily ... Keywords: Digital Rights Management (DRM), Open Digital Rights Language (ODRL), Open Mobile Alliance (OMA), Rights Expression Language, XML, XML Schema

Renato Iannella

2004-07-01T23:59:59.000Z

115

How to choose a digital preservation strategy: evaluating a preservation planning procedure  

Science Conference Proceedings (OSTI)

An increasing number of institutions throughout the world face legal obligations or business needs to collect and preserve digital objects over several decades. A range of tools exists today to support the variety of preservation strategies such as migration ... Keywords: OAIS model, digital libraries, digital preservation, evaluation, preservation planning, utility analysis

Stephan Strodl; Christoph Becker; Robert Neumayer; Andreas Rauber

2007-06-01T23:59:59.000Z

116

Digital Strategy | Department of Energy  

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

Digital Strategy Digital Strategy Digital Strategy November 21, 2013 - 5:15pm Addthis Implementing the Federal Digital Strategy Implementing the Federal Digital Strategy Alex Cohen Alex Cohen Senior Digital Information Strategist New expectations require the Federal Government to be ready to deliver and receive digital information and services anytime, anywhere and on any device. It must do so safely, securely, and with fewer resources. To build for the future, the Federal Government has developed a Digital Strategy that embraces the opportunity to innovate more with less, and enables entrepreneurs to better leverage government data to improve the quality of services to the American people. The Energy Department has responded to this challenge through key initiatives that make high-value data sets available through API's that

117

Additive assembly of digital materials  

E-Print Network (OSTI)

This thesis develops the use of additive assembly of press-fit digital materials as a new rapid-prototyping process. Digital materials consist of a finite set of parts that have discrete connections and occupy discrete ...

Ward, Jonathan (Jonathan Daniel)

2010-01-01T23:59:59.000Z

118

ELECTRONIC DIGITAL COMPUTER  

DOE Patents (OSTI)

The electronic digital computer is designed to solve systems involving a plurality of simultaneous linear equations. The computer can solve a system which converges rather rapidly when using Von Seidel's method of approximation and performs the summations required for solving for the unknown terms by a method of successive approximations.

Stone, J.J. Jr.; Bettis, E.S.; Mann, E.R.

1957-10-01T23:59:59.000Z

119

Double-digit growth  

SciTech Connect

The global need for additional generating capacity continues to grow at double digit rates in some cases. Opportunities for partnerships and joint ventures vary considerably by country and region. A closer look is taken at five countries where the playing fields are increasingly tipping to favor outside partners in power development projects -- India, Indonesia, Malaysia, Thailand, and Mexico.

Cartselos, T.; Meade, W.; Hernandez, L.

1993-09-01T23:59:59.000Z

120

RFI Comments - Digital Management Inc.  

Science Conference Proceedings (OSTI)

... Lessons from energy, oil, gas, or any large manufacturing industry ... Enterprise Encryption Key and Digital Certificate Management Market Outlook. ...

2013-04-08T23:59:59.000Z

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


121

Optical watthour meter digitizer  

SciTech Connect

As concern about energy conservation and energy-use efficiency increases, a simple and inexpensive instrument that would provide accurate, reliable and high-resolution data on electrical energy usage should find widespread application in research and industrial facilities. An instrument that would also provide one or more outputs compatible with a wide range of digital data acquisition systems would be especially appropriate, since the use of automatic data logging equipment is now common, even in small-scale and low-budget operations. An optical watthour meter digitizer was developed which meets these criteria. Based on the induction-type watthour meter, the digitizer provides an output pulse for a fixed amount of energy use. The digitizer senses the motion of the rotor disc of the meter by optically detecting passage of a nonreflective area painted on the underside of the disc. The passage of such area initiates a logic-compatible output pulse that can be used to measure power or energy usage in a variety of ways. The accuracy of the measurement is determined by the watthour meter. The resolution of the measurement is determined by the K/sub h/ constant (in watthours per revolution) of the meter and the number of equally spaced targets painted on the disc. The resolution of this device can be as small as a fraction of a watthour; the resolution of the manually read register on a watthour meter is typically a fraction of a kilowatthour. Several digitizers were fabricated, bench-tested, and installed in the field for long-term performance testing. All are performing satisfactorily.

Andrews, W.H.

1980-10-01T23:59:59.000Z

122

Crossing the Digital Divide  

SciTech Connect

Nuclear utilities continue to upgrade aging instrumentation and control (I&C) systems with modern digital-based systems to address reliability and obsolescence concerns. In addition, the industry has demonstrated that these systems can be successfully developed and deployed even for highly safety-significant applications, such as reactor protection. However, three factors have retarded wide-scale implementation of digital technology for plant modernization and business innovation: *Large-scale digital upgrades entail considerable risk; *The upgrades are very costly and have not led to bottom-line business improvement, financial or otherwise; *Cyber Security concerns discourage wide-scale digital integration. A new national research program is under way that has been designed to address these industry concerns about expanding the use of digital technology. The Idaho National Laboratory (INL) has lead responsibility for the Advanced Instrumentation, Information, and Control Systems Technologies research pathway within the Light Water Reactor Sustainability (LWRS) Program. The LWRS Program is a research and development (R&D) program sponsored by the U.S. Department of Energy (DOE) and performed in close collaboration with industry R&D and improvement programs (as defined in INL’s FY2009–2013 Light Water Reactor Sustainability Research and Development Program Plan, INL/MIS08-14918). Its purpose is to provide the technical foundations for licensing and managing the long-term, safe, and economical operation of existing nuclear power plants. The DOE’s program focus is on longer-term and higher-risk/reward research that contributes to the national policy objectives of energy security and environmental security. The specific concern addressed by this program is that large-scale I&C obsolescence could become a life-limiting issue for the current nuclear operating fleet.

Ken Thomas

2011-11-01T23:59:59.000Z

123

A digital metadata schema repository  

Science Conference Proceedings (OSTI)

The metadata schema of a digital archive describes the structure and attributes of metadata. Analysis and definition of metadata schema for a new digital archive must be carefully performed at the first stage. To ease the task, we implement a metadata ... Keywords: HTML, XML, digital archive, metadata schema repository, native XML database, web-based

Yen-Chun Lin; Hsiang-An Wang; Chien-Chung Huang; Wei Chen

2008-05-01T23:59:59.000Z

124

The Sustainable Enterprise: Enabling the Digital Thread  

Science Conference Proceedings (OSTI)

Page 1. The Sustainable Enterprise: Enabling the Digital Thread ... Verify & Validate Digital Thread Supports Honeywell's Sustainable Enterprise ...

2013-02-28T23:59:59.000Z

125

Elevation leads to altruistic behavior  

E-Print Network (OSTI)

of an emotion are key to understand- ing its origins, functions, or social consequences (e.g., Frijda, 1987; Lazarus, 1991; Nesse, 1990; Russell, 1991; Tooby & Cosmides, 2008). However, to date, there is only limited evi- dence that elevation affects prosocial... Received 5/3/09; Revision accepted 6/29/09 Research Report 316 Schnall et al. Negro College Fund (UNCF). In a second experiment, partici- pants read about acts of compassion and then were asked to donate some or all of their $5 participation payment...

Schnall, Simone; Roper, Jean; Fessler, Daniel M. T.

2010-01-01T23:59:59.000Z

126

Digital scale converter  

DOE Patents (OSTI)

A digital scale converter is provided for binary coded decimal (BCD) conversion. The converter may be programmed to convert a BCD value of a first scale to the equivalent value of a second scale according to a known ratio. The value to be converted is loaded into a first BCD counter and counted down to zero while a second BCD counter registers counts from zero or an offset value depending upon the conversion. Programmable rate multipliers are used to generate pulses at selected rates to the counters for the proper conversion ratio. The value present in the second counter at the time the first counter is counted to the zero count is the equivalent value of the second scale. This value may be read out and displayed on a conventional seven-segment digital display.

Upton, Richard G. (Oak Ridge, TN)

1978-01-01T23:59:59.000Z

127

Metrological digital audio reconstruction  

DOE Patents (OSTI)

Audio information stored in the undulations of grooves in a medium such as a phonograph record may be reconstructed, with little or no contact, by measuring the groove shape using precision metrology methods coupled with digital image processing and numerical analysis. The effects of damage, wear, and contamination may be compensated, in many cases, through image processing and analysis methods. The speed and data handling capacity of available computing hardware make this approach practical. Two examples used a general purpose optical metrology system to study a 50 year old 78 r.p.m. phonograph record and a commercial confocal scanning probe to study a 1920's celluloid Edison cylinder. Comparisons are presented with stylus playback of the samples and with a digitally re-mastered version of an original magnetic recording. There is also a more extensive implementation of this approach, with dedicated hardware and software.

Fadeyev; Vitaliy (Berkeley, CA), Haber; Carl (Berkeley, CA)

2004-02-19T23:59:59.000Z

128

DIGITAL Q METER  

DOE Patents (OSTI)

A digital Q meter is described for measuring the Q of mechanical or electrical devices. The meter comprises in combination a transducer coupled to an input amplifier, and an upper and lower level discriminator coupled to the amplifier and having their outputs coupled to an anticoincidence gate. The output of the gate is connected to a scaler. The lower level discriminator is adjusted to a threshold level of 36.8 percent of the operating threshold level of the upper level discriminator. (AEC)

Briscoe, W.L.

1962-02-13T23:59:59.000Z

129

An automated vision-based method for rapid 3D energy performance modeling of existing buildings using thermal and digital imagery  

Science Conference Proceedings (OSTI)

Modeling the energy performance of existing buildings enables quick identification and reporting of potential areas for building retrofit. However, current modeling practices of using energy simulation tools do not model the energy performance of buildings ... Keywords: 3D reconstruction, Building retrofit, Energy performance modeling, Structure-from-Motion, Thermography

Youngjib Ham, Mani Golparvar-Fard

2013-08-01T23:59:59.000Z

130

Applicability of digital terrain analyses to wind energy prospecting and siting  

DOE Green Energy (OSTI)

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

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

1993-07-01T23:59:59.000Z

131

DOE Digital Photo Archive  

DOE Data Explorer (OSTI)

The DOE Digital Photo Archive is a resource made available to the DOE community as well as the general public for the purposes of enhancing communication, education, and ultimately the overall mission of the Department of Energy (DOE). The images in the Archive are downloadable as low resolution JPG files and may easily and quickly be requested in high resolution. The database can be browsed or is searchable by science program, sites by name, geographic locations, etc. Each photo has a caption or brief summary, and most are not copyrighted.

132

Stored program digital process controller  

DOE Patents (OSTI)

A digital process control function generator wherein a timing clock, in conjunction with programmable read only memories controls variables in a process with respect to time.

Stephenson, Dwight L. (Los Alamos, NM)

1977-01-04T23:59:59.000Z

133

NIST Digital Media Group: publications  

Science Conference Proceedings (OSTI)

... Guide (See above guide) Download PDF (294 KB) NIST/Library of Congress ... SPIE Conf. ... Mastering and Archiving Uncompressed Digital Video Test ...

134

Digital Holographic Interferometry and Speckle Correlation  

Science Conference Proceedings (OSTI)

Relations and combinations between holographic interferometry and speckle correlation in contouring by phase?shifting digital holography are discussed. Three?dimensional distributions of correlations of the complex amplitudes and intensities before and after the laser wavelength shift are calculated in numerical simulations where a rough surface is modeled with random numbers. Fringe localization related to speckle displacement as well as speckle suppression in phase analysis are demonstrated for general surface shape and recording conditions.

Ichirou Yamaguchi; Scientist Emeritus of RIKEN

2010-01-01T23:59:59.000Z

135

The digital laser  

E-Print Network (OSTI)

It is well-known how to control the spatial output from a laser, with most solutions to date involving customised intra-cavity elements in the form of apertures, diffractive optics and free-form mirrors. These optical elements require considerable design and fabrication effort and suffer from the further disadvantage of being immutably connected to the selection of a particular spatial mode. Consequently, most laser systems are designed for the ubiquitous Gaussian mode, whereas it is clear that there are many instances when a customised mode would be preferable. We overcome these limitations with the first digital laser, comprising an electrically addressed reflective phase-only spatial light modulator as an intra-cavity holographic mirror. The phase and amplitude of the holographic mirror may be controlled as simply as writing a new gray-scale image (computer generated hologram) to the device: on-demand laser modes. We show that we can digitally control the laser modes with ease, albeit with higher round-tri...

Ngcobo, Sandile; Burger, Liesl; Forbes, Andrew

2013-01-01T23:59:59.000Z

136

Evidence for Stratospheric Downwelling Associated with High-Elevation Topography  

SciTech Connect

The continued presence of elevated chlorine-36 in Sierra Nevada streams is commonly interpreted as residual nuclear fallout, but this prolonged storage contradicts accepted hydrologic models, which indicate much less short-term groundwater storage. Our hypothesis is that the chlorine-36 source is stratospheric downwelling during high-intensity storms by measuring beryllium-7 and -10, sodium-22, and chlorium-36 in precipitation, lake, and soil samples. These nuclides are produced in abundance in the stratosphere and, except for chlorine-36, did not occur as nuclear fallout. This project will either substantially change hydrologic models or reveal an unrecognized pathway for stratosphere-troposphere exchange. Either result will have substantial scientific impact. The test of the hypothesis is straightforward. If stratospheric downwelling occurs to the extent indicated by observed Sierran chlorine-36 levels, it should be detectable by elevated levels of beryllium-7 and -10, sodium-22, and chlorine-36 in storm precipitation. Samples will be collected from an established array of sampling locations. If elevated levels of these nuclides are not found, it would cast severe doubt on the hypothesis. In this case, Sierran hydrologic models will have to take into account high levels of long-term groundwater storage. If elevated levels of these nuclides are found in Sierran precipitation, it could only be from stratospheric input, both because nuclear fallout is no longer occurring and because beryllium-7 and -10 and sodium-22 are not produced by atmospheric nuclear tests.

Finkel, R

2009-01-28T23:59:59.000Z

137

TABLE OF CONTENTS Structural Aluminides for Elevated ...  

Science Conference Proceedings (OSTI)

Structural Aluminides for Elevated ..... Influence of Oxidation Protective Coatings on the Ductility of ... Protection of TiAl-Alloys for Automotive and Aero-Engine.

138

DIGITAL VIDEO CAMCORDER Instruction Manual  

E-Print Network (OSTI)

'emploi VIDEOCÁMARA Y GRABADORA DIGITAL Manual de Instrucciones ENGLISH FRAN�AIS ESPA�OL Mini Digital Video Cassette. This equipment generates, uses and can radiate radio frequency energy and, if not installed and use in accordance devices or other sources of electric or magnetic radiation. They may cause picture interference

139

Image enhancement by digital computer  

Science Conference Proceedings (OSTI)

In the past 15 years digital computers have been used to greatly improve from images. In this paper we review and discuss a number of techniques for the enhancement of imagery by digital computer. The implications of this technology to verification of arms control treaties is left to the reader.

B. R. Hunt

1983-01-01T23:59:59.000Z

140

OpenEI Community - Federal Digital Strategy  

Open Energy Info (EERE)

part of the Federal Digital Strategy http:en.openei.orgcommunityblogopenei-part-federal-digital-strategy

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


141

New Plug-Together Digital Multimeter  

E-Print Network (OSTI)

in sections that plug together to form a compactnstrument, giving the user a chorce of capabilities By Albert Gookin 'TtHS PHOTO below shows Hewlett-Packard's section (Model 347o1A) that measures only dc in I newest a-digit voltmeter, the Model 3470 Mea- four ranges from 1 volt full-scale to 1000 volts. Future plug-on sections will include autoranging, high-sensitivity current measurements and other functional capabilities. For those who wish to design their own signal-conditioning circuits, an empty bottom section is also available Iouter shells are cast aluminum]. Center sections can be placed between the top and

unknown authors

1972-01-01T23:59:59.000Z

142

Digital Divide: How Can Digital Libraries Bridge the Gap?  

Science Conference Proceedings (OSTI)

Recent developments in Information and Communication Technologies (ICT) have, while making our life easier, created a social divide known as the digital divide. Statistics show that there are significant disparities among the populations in the developed ...

Gobinda G. Chowdhury

2002-12-01T23:59:59.000Z

143

An Emulated Digital CNN Implementation  

Science Conference Proceedings (OSTI)

A new emulated digital CNN Universal Machine chip architecture is introduced and the main steps of the design process are shown in this paper. One core processor can be implemented on 2 × 2 mm^2 silicon ...

Péter Keresztes; ákos Zarándy; Tamás Roska; Péter Szolgay; Tamás Bezák; Timót Hidvégi; Péter Jónás; Attila Katona

1999-11-01T23:59:59.000Z

144

Preserving digital data in heterogeneous environments  

Science Conference Proceedings (OSTI)

Digital preservation aims at maintaining digital objects accessible over a long period of time, regardless of the challenges of organizational or technological changes or failures. In particular, data produced in e-Science domains could be reliably stored ... Keywords: data grids, dependability, digital libraries, digital preservation

Gonçalo Antunes; José Barateiro; Manuel Cabral; José Borbinha; Rodrigo Rodrigues

2009-06-01T23:59:59.000Z

145

Decimal System and Double Digits  

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

Decimal System and Double Digits Decimal System and Double Digits Name: Ken Status: other Grade: other Country: Canada Date: April 2011 Question: If the origin of the decimal system reflects counting on ten fingers and if zero came into use after the decimal system had been established why did we not create a single symbol for our tenth digit rather than use the double digit 10? If T were to represent the tenth number this would have created a counting system where the number series 1,2...9,T is followed by the same series having a 1 to the left then followed by the same series having a 2 to the left, etc. The T would be the last number in a series of ten single digits rather than be the first number in a series of double digits. The symbol zero would be used only between negative one and positive one because it represents the existence of nothing and, therefore, would have no other function.

146

A Automated Tool for Supporting FMEAs of Digital Systems  

SciTech Connect

Although designs of digital systems can be very different from each other, they typically use many of the same types of generic digital components. Determining the impacts of the failure modes of these generic components on a digital system can be used to support development of a reliability model of the system. A novel approach was proposed for such a purpose by decomposing the system into a level of the generic digital components and propagating failure modes to the system level, which generally is time-consuming and difficult to implement. To overcome the associated issues of implementing the proposed FMEA approach, an automated tool for a digital feedwater control system (DFWCS) has been developed in this study. The automated FMEA tool is in nature a simulation platform developed by using or recreating the original source code of the different module software interfaced by input and output variables that represent physical signals exchanged between modules, the system, and the controlled process. For any given failure mode, its impacts on associated signals are determined first and the variables that correspond to these signals are modified accordingly by the simulation. Criteria are also developed, as part of the simulation platform, to determine whether the system has lost its automatic control function, which is defined as a system failure in this study. The conceptual development of the automated FMEA support tool can be generalized and applied to support FMEAs for reliability assessment of complex digital systems.

Yue,M.; Chu, T.-L.; Martinez-Guridi, G.; Lehner, J.

2008-09-07T23:59:59.000Z

147

Safety Share Elevators, Escalators and Moving Walkways  

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

3, 2010 3, 2010 Safety Share Elevators, Escalators and Moving Walkways Dick Donovan, of HS-70, informed the HSS VPP Committee about a recent safety incident he experienced while at an airport in Las Vegas. Dick tripped as he was getting off of the escalator. The incident made him consider the day-to-day hazards we take for granted. With this in mind, Dick made an effort to look around to find safety information about using elevators, escalators and moving walkways. Dick came across some useful safety information provided by the Otis Elevator Company. The web site below provides links to two good one-page reminders for safety on elevators, escalators, and moving walkways. http://www.otis.com/site/us/Pages/SafetyforAll.aspx Dick also found more interactive presentations on the same material, see website below. These

148

Broadband phase-preserved optical elevator  

E-Print Network (OSTI)

Phase-preserved optical elevator is an optical device to lift up an entire plane virtually without distortion in light path or phase. Using transformation optics, we have predicted and observed the realization of such a broadband phase-preserved optical elevator, made of a natural homogeneous birefringent crystal without resorting to absorptive and narrowband metamaterials involving time-consuming nano-fabrication. In our demonstration, the optical elevator is designed to lift a sheet upwards, and the phase is verified to be preserved always. The camouflage capability is also demonstrated in the presence of adjacent objects of the same scale at will. The elevating device functions in different surrounding media over the wavelength range of 400-700 nm. Our work opens up prospects for studies of light trapping, solar energy, illusion optics, communication, and imaging.

Yuan Luo; Tiancheng Han; Baile Zhang; Cheng-Wei Qiu; George Barbastathis

2011-09-30T23:59:59.000Z

149

Lighting Group: Controls: Advanced Digital Controls  

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

Advanced Digital Controls Advanced Digital Controls HPCBS Advanced Digital Controls Objective The goal of this project is to hasten the adoption of digital lighting control systems to allow commercial building operators to optimize the neergy performance of their lighting systems, implement demand responsive control, and improve occupant comfort and productivity. The specific objectives are as follows: (1) Advance the adoption of digital lighting control systems by working with industry to embed IBECS technology into existing analog control and DALI products, and by developing compelling demonstrations of digital control systems for evaluation by early adopters. (2) In collaboration with equipment manufacturers, produce digital lighting system prototypes that demonstrate the advantages of digitally controlled lighting systems to innovative property managers and other energy stakeholders. A digitally controlled lighting system consists of lights that are individually controllable via a network. The advantages of digital control are:

150

Modeling Topographic Solar Radiation Using GOES Data  

Science Conference Proceedings (OSTI)

In this paper the authors present an algorithm that combines solar radiation fields derived from Geostationary Operational Environmental Satellite (GOES) observations with digital elevation data to produce topographically varying insolation ...

R. Dubayah; S. Loechel

1997-02-01T23:59:59.000Z

151

From Digital Library to Digital Government: A Case Study in Crime Data Mapping and Mining  

Science Conference Proceedings (OSTI)

In light of the significant research activities in digital library, digital government, and e-commerce over the past decade, there seems to be common threads among them and unique challenges and opportunities ahead. For digital library, we are beginning ...

Hsinchun Chen

2002-12-01T23:59:59.000Z

152

On the long-term retention of geometry-centric digital engineering artifacts  

Science Conference Proceedings (OSTI)

This paper discusses the challenges of long-term preservation of digital geometric models and the engineering processes associated with them. For engineering, design, manufacturing, and physics-based simulation data this requires formats that are accessible ... Keywords: Digital preservation, Knowledge capture, Long-term knowledge retention, Representation, Standards

William C. Regli; Joseph B. Kopena; Michael Grauer

2011-07-01T23:59:59.000Z

153

Digital Innovation and the Division of Innovative Labor: Digital Controls in the Automotive Industry  

Science Conference Proceedings (OSTI)

In this study of the U.S. automobile industry, we highlight the way the division of innovative labor across firms in the supply chain can be influenced by a particular form of digital innovation known as “digital control systems.” Digital ... Keywords: automotive industry, digital control hierarchy, digital controls, digital innovation, division of innovative labor, dual-product hierarchy, inclusionary hierarchy, mirroring hypothesis, systems integration

Jaegul Lee; Nicholas Berente

2012-09-01T23:59:59.000Z

154

Electrostatic Climber for Space Elevator and Launcher  

E-Print Network (OSTI)

Author details research on the new, very prospective, electrostatic Space Elevator climber based on a new electrostatic linear engine previously offered at the 42nd Joint Propulsion Conference (AIAA-2006-5229) and published in AEAT, Vol.78, No.6, 2006, pp. 502-508. The electrostatic climber discussed can have any speed (and braking), the energy for climber movement is delivered by a lightweight high-voltage line into a Space Elevator-holding cable from Earth electric generator. This electric line also can be used for delivery electric energy to a Geosynchronous Space Station. At present, the best solution of the climber problem (announced by NASA as one important awarding problem of Space Elevator) is problematic. Author also shows the linear electrostatic engine may be used as realistic power space launcher at the present time. Two projects illustrate these new devices. Key words: Space elevator, Electrostatic climber for space elevator, Electrostatic space launcher, Electrostatic accelerator. This work is presented as paper AIAA-2007-5838 for 43 Joint Propulsion Conference, Cincinnati, Ohio, USA, 9-11 July, 2007,

A. Bolonkin

2007-05-14T23:59:59.000Z

155

Apparatus and method for managing digital resources by passing digital resource tokens between queues  

DOE Patents (OSTI)

A method of managing digital resources of a digital system includes the step of reserving token values for certain digital resources in the digital system. A selected token value in a free-buffer-queue is then matched to an incoming digital resource request. The selected token value is then moved to a valid-request-queue. The selected token is subsequently removed from the valid-request-queue to allow a digital agent in the digital system to process the incoming digital resource request associated with the selected token. Thereafter, the selected token is returned to the free-buffer-queue. 6 figs.

Crawford, H.J.; Lindenstruth, V.

1999-06-29T23:59:59.000Z

156

Adaptive Cooling of Integrated Circuits using Digital Microfluidics. Artech House  

E-Print Network (OSTI)

Abstract—Thermal management is critical for integrated circuit (IC) design. With each new IC technology generation, feature sizes decrease, while operating speeds and package densities increase. These factors contribute to elevated die temperatures detrimental to circuit performance and reliability. Furthermore, hot spots due to spatially nonuniform heat flux in ICs can cause physical stress that further reduces reliability. While a number of chip cooling techniques have been proposed in the literature, most are still unable to address the varying thermal profiles of an IC and their capability to remove a large amount of heat is undermined by their lack of reconfigurability of flows. We present an alternative cooling technique based on a recently invented "digital microfluidic " platform. This novel digital fluid handling platform uses a phenomenon known as electrowetting, and allows for a vast array of discrete droplets of liquid, ranging from microliters to nanoliters, and potentially picoliters, to be independently moved along a substrate. While this technology was originally developed for a biological and chemical lab-on-a-chip, we show how it can be adapted to be used as a fully reconfigurable, adaptive cooling platform. Index Terms—Adaptive cooling, chip cooling, digital microfluidics, electrowetting, hot-spot cooling, microfluidics. I.

Philip Y. Paik; Vamsee K. Pamula; Krishnendu Chakrabarty

2007-01-01T23:59:59.000Z

157

Digital Networks: Electronics and Beyond  

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

Digital Networks: Electronics and Beyond Digital Networks: Electronics and Beyond Speaker(s): Bruce Nordman Date: January 9, 2009 - 12:00pm Location: 90-3122 For the last five years or so, I have made digital networks my prime research focus. For the most part, this has concentrated on IT networks as with PCs and servers, and the network interfaces and network devices that enable it. I will outline how to think about networks as they collide with energy use and efficiency, and report on the several projects we have underway in this area. Networks have a unique relationship to industry standards and I will outline some of the challenges and opportunities this brings. In addition, we have the looming prospect of the networking of many non-electronic loads in buildings (particularly lighting and climate

158

Digitally controlled distributed phase shifter  

DOE Patents (OSTI)

A digitally controlled distributed phase shifter is comprised of N phase shifters. Digital control is achieved by using N binary length-weighted electrodes located on the top surface of a waveguide. A control terminal is attached to each electrode thereby allowing the application of a control signal. The control signal is either one of two discrete bias voltages. The application of the discrete bias voltages change the modal index of a portion of the waveguide that corresponds to a length of the electrode to which the bias voltage is applied, thereby causing the phase to change through the underlying portion of the waveguide. The digitally controlled distributed phase shift network has a total phase shift comprised of the sum of the individual phase shifters.

Hietala, V.M.; Kravitz, S.H.; Vawter, G.A.

1992-12-31T23:59:59.000Z

159

Digitally controlled distributed phase shifter  

DOE Patents (OSTI)

A digitally controlled distributed phase shifter is comprised of N phase shifters. Digital control is achieved by using N binary length-weighted electrodes located on the top surface of a waveguide. A control terminal is attached to each electrode thereby allowing the application of a control signal. The control signal is either one or two discrete bias voltages. The application of the discrete bias voltages changes the modal index of a portion of the waveguide that corresponds to a length of the electrode to which the bias voltage is applied, thereby causing the phase to change through the underlying portion of the waveguide. The digitally controlled distributed phase shift network has a total phase shift comprised of the sum of the individual phase shifters.

Hietala, V.M.; Kravitz, S.H.; Vawter, G.A.

1993-08-17T23:59:59.000Z

160

Digital Surveying Directional Surveying Specialists | Open Energy  

Open Energy Info (EERE)

Digital Surveying Directional Surveying Specialists Digital Surveying Directional Surveying Specialists Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Digital Surveying Directional Surveying Specialists Author Directional Surveying Specialists Published Publisher Not Provided, 2012 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Digital Surveying Directional Surveying Specialists Citation Directional Surveying Specialists. Digital Surveying Directional Surveying Specialists [Internet]. 2012. [cited 2013/10/08]. Available from: http://www.digitalsurveying.co.za/services/geophysical-borehole-surveying/overview/optical-televiewer/ Retrieved from "http://en.openei.org/w/index.php?title=Digital_Surveying_Directional_Surveying_Specialists&oldid=690244"

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


161

Elevance Renewable Sciences Inc | Open Energy Information  

Open Energy Info (EERE)

Elevance Renewable Sciences Inc Elevance Renewable Sciences Inc Jump to: navigation, search Name Elevance Renewable Sciences Inc Place Bolingbrook, Illinois Zip 60440 Sector Biofuels, Renewable Energy Product Illinois-based developer of biofuels and renewable chemicals from plant-based oils and animal fats. Coordinates 41.698175°, -88.081199° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":41.698175,"lon":-88.081199,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

162

U-030: Apache Tomcat Lets Untrusted Web Applications Gain Elevated...  

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

0: Apache Tomcat Lets Untrusted Web Applications Gain Elevated Privileges U-030: Apache Tomcat Lets Untrusted Web Applications Gain Elevated Privileges November 9, 2011 - 8:30am...

163

Sensitivity of the South Asian monsoon to elevated and non-elevated heating  

E-Print Network (OSTI)

Sensitivity of the South Asian monsoon to elevated and non-elevated heating William R. Boos1 the South Asian summer monsoon, but recent work showed this monsoon was largely unaffected by removal. There is debate about whether those mountain ranges generate a strong monsoon by insulating the thermal maximum

164

References. Digital Images and Computer Modelling in ...  

Science Conference Proceedings (OSTI)

... A field example and implications for clay-lined waste ... 13 C. Kittel, Introduction to Solid State Physics ... Studying Porous Media, J. Colloid and Interface ...

2003-02-05T23:59:59.000Z

165

Privacy, Predictability or Serendipity and Digital Cities  

Science Conference Proceedings (OSTI)

This paper explores the relationship of unplanned social interaction and the fear associated with current attitudes about cities, both place-based and digital. The symbiotic relationship of the physical and digital city is considered. Specifically, the ...

Gary Gumpert; Susan Drucker

2001-10-01T23:59:59.000Z

166

Digital Watermarking and Steganography, 2 edition  

Science Conference Proceedings (OSTI)

Digital audio, video, images, and documents are flying through cyberspace to their respective owners. Unfortunately, along the way, individuals may choose to intervene and take this content for themselves. Digital watermarking and steganography technology ... Keywords: Networking, Security

Ingemar Cox; Matthew Miller; Jeffrey Bloom; Jessica Fridrich; Ton Kalker

2007-11-01T23:59:59.000Z

167

Representing aggregate works in the digital library  

Science Conference Proceedings (OSTI)

This paper studies the challenge of representing aggregate works such as encyclopedias, collected poems and journals in heterogenous digital library collections. Reflecting on the materials used by humanities academics, we demonstrate the varied range ... Keywords: aggregate documents, architecture, digital libraries

George Buchanan; Jeremy Gow; Ann Blandford; Jon Rimmer; Claire Warwick

2007-06-01T23:59:59.000Z

168

Digital cellular solids : reconfigurable composite materials  

E-Print Network (OSTI)

Digital materials are comprised of a small number of types of discrete physical building blocks, which assemble to form constructions that meet the versatility and scalability of digital computation and communication ...

Cheung, Kenneth Chun-Wai

2012-01-01T23:59:59.000Z

169

'Power and the digital divide'  

Science Conference Proceedings (OSTI)

The ethical and political dilemmas raised by Information and Communication Technology (ICT) have only just begun to be understood. The impact of centralised data collection, mass communication technologies or the centrality of computer technology as ... Keywords: Foucault, Information and Communication Technology (ICT), coercion, digital divide, force, power

Jeremy Moss

2002-08-01T23:59:59.000Z

170

Plasma digital density determining device  

DOE Patents (OSTI)

The density of a decaying plasma in an electrically conducting enclosure is determined by applying an excitation to the cavity formed by the enclosure and counting digitally the number of resonant frequencies traversed by the combination of the cavity and the decaying plasma.

Sprott, Julien C. (Madison, WI); Lovell, Thomas W. (Madison, WI); Holly, Donald J. (Madison, WI)

1976-01-01T23:59:59.000Z

171

Digital signal generation for wireless communication systems  

E-Print Network (OSTI)

be achieved. (Supply voltage requirements will be discussedvoltages of digital CMOS processes. 2) Strict adjacent channel power ratio (ACPR) requirements

Rode, Jeremy

2010-01-01T23:59:59.000Z

172

Long-Term Preservation of Digital Material  

E-Print Network (OSTI)

Long-Term Preservation of Digital Material { Building an Archive to Preserve Digital Cultural Heritage from the Internet by Andreas Aschenbrenner Digital information has become seemingly ubiquitous, as technology saturates all aspects of our life. Consequently, people become increasingly dependent on digital information and the Internet as a medium for gaining and exchanging information. At the same time, the structure and content of the Internet growingly mirrors society, making it an important part of our modern cultural heritage.

Andreas Aschenbrenner

2001-01-01T23:59:59.000Z

173

COE 202: Digital Logic Design Combinational Circuits  

E-Print Network (OSTI)

is digital readout found in electronic devices like clocks, TVs, etc. · Made of seven light-emitting diodes

Almulhem, Ahmad

174

Digital inclusion in Chilean in rural schools  

Science Conference Proceedings (OSTI)

This paper analyzes conditions for improving digital inclusion in Chilean rural schools, using a multidimensional definition of digital divide. Using qualitative and quantitative data, we focus on teacher's skills, access to communication, Internet connection ... Keywords: digital divide, internet, rural schools, teachers

Jaime Sánchez

2010-06-01T23:59:59.000Z

175

Mobile digital calendars in knowledge work  

Science Conference Proceedings (OSTI)

This article investigates the usage of mobile digital-calendar solutions in a knowledge work setting through the means of an empirical survey (n = 220) among managers and experts in a global telecommunications company. It is indicated, that the mobile digital ... Keywords: PIM, calendar use, digital calendars, electronic calendaring, electronic scheduling, global telecommunications, knowledge work, mobile calendars, mobile communications, mobile computing, personal information management

Anna Sell

2008-08-01T23:59:59.000Z

176

Using standards in digital library design & development  

Science Conference Proceedings (OSTI)

This tutorial will cover a set of Standards and defacto Standards that can play a role in the design and development of Digital Library applications. The Standards that will be discussed are the ISO MPEG-21 Digital Item Declaration, the ISO MPEG-21 Digital ...

Jeroen Bekaert; Xiaoming Liu; Herbert Van de Sompel

2005-06-01T23:59:59.000Z

177

Governance of labor in digital video networks  

Science Conference Proceedings (OSTI)

Theories of digitally distributed labor tend to fall into an idealized, oppositional binary that conflates digital labor systems with critiques that are judgmental rather than based on detailed analyses of the actual system or site. On the one hand are ... Keywords: algorithm, beta, crowdsourcing, digital, governance, internet, technology, television, video

Adam Fish

2011-02-01T23:59:59.000Z

178

Design computing of complex-curved geometry using digital fabrication methods  

E-Print Network (OSTI)

The production of design information for digital fabrication is presented in this thesis. This thesis outlines the research of generating information for physical construction as architectural models of complex curved walls ...

Griffith, Kenfield A. (Kenfield Allistair)

2006-01-01T23:59:59.000Z

179

Analysis of a digital chirp synthesizer  

Science Conference Proceedings (OSTI)

Definite advantages are gained by using a chirp (linear-FM) waveform for radar pulse compression. Digital generation of this waveform provides programmability, predictability, and repeatability. Of the digital implementations considered, the digital chirp synthesizer is shown to have the most flexibility and is more readily miniaturized than the arbitrary waveform generator design. Elements and features of the digital chirp synthesizer are examined and design considerations are presented. A TTL breadboard circuit that was built demonstrates the soundness of the fundamental design of the digital chirp synthesizer concept. 10 refs., 18 figs., 10 tabs.

Allen, C.T.

1988-08-01T23:59:59.000Z

180

Digital Anthropology: Projects and Platforms  

E-Print Network (OSTI)

. Current plans include expanding the discussion boards and encouraging broad-scale participation, both inside and outside the discipline, where conversations are staged around pressing events, vexed disciplinary issues (ethnographic futures, digitality... social change in contemporary Nepal on the macro-level. Mark Turin is also involved in another worthy online effort, World Oral Literature Project – “An urgent global initiative to document and make accessible endangered oral literatures before...

Lende, Daniel

2011-11-28T23:59:59.000Z

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


181

Elevated Convection and Castellanus: Ambiguities, Significance, and Questions  

Science Conference Proceedings (OSTI)

The term elevated convection is used to describe convection where the constituent air parcels originate from a layer above the planetary boundary layer. Because elevated convection can produce severe hail, damaging surface wind, and excessive ...

Stephen F. Corfidi; Sarah J. Corfidi; David M. Schultz

2008-12-01T23:59:59.000Z

182

Clean Cities: National Clean Fleets Partner: ThyssenKrupp Elevator  

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

Clean Fleets Partner: ThyssenKrupp Elevator Photo of a ThyssenKrupp van parked at a propane fueling station. Between 2009 and 2011, ThyssenKrupp Elevator reduced the petroleum...

183

Fully Nonlinear Statistics of Wave Crest Elevation Calculated Using a Spectral Response Surface Method: Applications to Unidirectional Sea States  

Science Conference Proceedings (OSTI)

This paper concerns the calculation of the probability of exceedance of wave crest elevation. The statistics have been calculated for broadbanded, unidirectional, deep-water sea states by incorporating a fully nonlinear wave model into a spectral ...

R. S. Gibson; C. Swan; P. S. Tromans

2007-01-01T23:59:59.000Z

184

Color spaces in digital video  

SciTech Connect

Whether it`s photography, computer graphics, publishing, or video; each medium has a defined color space, or gamut, which defines the extent that a given set of RGB colors can be mixed. When converting from one medium to another, an image must go through some form of conversion which maps colors into the destination color space. The conversion process isn`t always straight forward, easy, or reversible. In video, two common analog composite color spaces are Y`tjv (used in PAL) and Y`IQ (used in NTSC). These two color spaces have been around since the beginning of color television, and are primarily used in video transmission. Another analog scheme used in broadcast studios is Y`, R`-Y`, B`-Y` (used in Betacam and Mll) which is a component format. Y`, R`-Y`,B`-Y` maintains the color information of RGB but in less space. From this, the digital component video specification, ITU-Rec. 601-4 (formerly CCIR Rec. 601) was based. The color space for Rec. 601 is symbolized as Y`CbCr. Digital video formats such as DV, Dl, Digital-S, etc., use Rec. 601 to define their color gamut. Digital composite video (for D2 tape) is digitized analog Y`UV and is seeing decreased use. Because so much information is contained in video, segments of any significant length usually require some form of data compression. All of the above mentioned analog video formats are a means of reducing the bandwidth of RGB video. Video bulk storage devices, such as digital disk recorders, usually store frames in Y`CbCr format, even if no other compression method is used. Computer graphics and computer animations originate in RGB format because RGB must be used to calculate lighting and shadows. But storage of long animations in RGB format is usually cost prohibitive and a 30 frame-per-second data rate of uncompressed RGB is beyond most computers. By taking advantage of certain aspects of the human visual system, true color 24-bit RGB video images can be compressed with minimal loss of visual information. For example, humans `see` more white-to-black (luminance) detail then red, green, or blue color detail. Also, the eye is most sensitive to green colors. Taking advantage of this, both composite and component video allocates more bandwidth for the luma (Y`) signal than the chroma signals. Y`611 is composed of 59% green`, 30% red`, and 11% blue` (prime symbol denotes gamma corrected colors). This luma signal also maintains compatibility with black and white television receivers. Component digital video converts R`G`B` signals (either from a camera or a computer) to a monochromatic brightness signal Y` (referred here as luma to distinguish it from the CIE luminance linear- light quantity), and two color difference signals Cb and Cr. These last two are the blue and red signals with the luma component subtracted out. As you know, computer graphic images are composed of red, green, and blue elements defined in a linear color space. Color monitors do not display RGB linearly. A linear RGB color space image must be gamma corrected to be displayed properly on a CRT. Gamma correction, which is approximately a 0.45 power function, must also be employed before converting an RGB image to video color space. Gamma correction is defined for video in the international standard: ITU-Rec. BT.709-4. The gamma correction transform is the same for red, green, and blue. The color coding standard for component digital video and high definition video symbolizes gamma corrected luma by Y`, the blue difference signal by Cb (Cb = B` -Y`), and the red color difference signal by Cr (Cr = R` - Y`). Component analog HDTV uses Y`PbPr. To reduce conversion errors, clip in R`G`B`, not in Y`CbCr space. View video on a video monitor, computer monitor phosphors are wrong. Use a large word size (double precision) to avoid warp around, the0232n round the results to values between 0 and 255. And finally, recall that multiplying two 8- bit numbers results in a 16-bit number, so values need to be clipped to 8-bits.

Gaunt, R.

1997-05-01T23:59:59.000Z

185

Digital electronic bone growth stimulator  

DOE Patents (OSTI)

A device is described for stimulating bone tissue by applying a low level alternating current signal directly to the patient`s skin. A crystal oscillator, a binary divider chain and digital logic gates are used to generate the desired waveforms that reproduce the natural electrical characteristics found in bone tissue needed for stimulating bone growth and treating osteoporosis. The device, powered by a battery, contains a switch allowing selection of the correct waveform for bone growth stimulation or osteoporosis treatment so that, when attached to the skin of the patient using standard skin contact electrodes, the correct signal is communicated to the underlying bone structures. 5 figs.

Kronberg, J.W.

1995-05-09T23:59:59.000Z

186

Digital electronic bone growth stimulator  

DOE Patents (OSTI)

A device for stimulating bone tissue by applying a low level alternating current signal directly to the patient's skin. A crystal oscillator, a binary divider chain and digital logic gates are used to generate the desired waveforms that reproduce the natural electrical characteristics found in bone tissue needed for stimulating bone growth and treating osteoporosis. The device, powered by a battery, contains a switch allowing selection of the correct waveform for bone growth stimulation or osteoporosis treatment so that, when attached to the skin of the patient using standard skin contact electrodes, the correct signal is communicated to the underlying bone structures.

Kronberg, James W. (Aiken, SC)

1995-01-01T23:59:59.000Z

187

BIM-Based Digital Lighting Controls  

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

industry has been slow to embrace new technologies and concepts, and electrical installers are largely unfamiliar with digital control technologies. For a lighting controls...

188

NIST Releases Updates to Digital Signature Standard  

Science Conference Proceedings (OSTI)

... The National Institute of Standards and Technology (NIST) has released a revision to the digital standard used to ensure the integrity of electronic ...

2013-07-25T23:59:59.000Z

189

New Reference Standards for Digital Mammography  

Science Conference Proceedings (OSTI)

New Reference Standards for Digital Mammography. ... The NIST 100 kV tungsten anode x-ray unit and the Ritz primary standard free-air ionization ...

2013-03-13T23:59:59.000Z

190

Universal digital quantum simulation with trapped ions  

E-Print Network (OSTI)

A digital quantum simulator is an envisioned quantum device that can be pro- grammed to efficiently simulate any other local system. We demonstrate and investigate the digital approach to quantum simulation in a system of trapped ions. Using sequences of up to 100 gates and 6 qubits, the full time dynamics of a range of spin systems are digitally simulated. Interactions beyond those naturally present in our simulator are accurately reproduced and quantitative bounds are provided for the overall simulation quality. Our results demon- strate the key principles of digital quantum simulation and provide evidence that the level of control required for a full-scale device is within reach.

B. P. Lanyon; C. Hempel; D. Nigg; M. Müller; R. Gerritsma; F. Zähringer; P. Schindler; J. T. Barreiro; M. Rambach; G. Kirchmair; M. Hennrich; P. Zoller; R. Blatt; C. F. Roos

2011-09-07T23:59:59.000Z

191

Axial Tomography from Digitized Real Time Radiography  

DOE R&D Accomplishments (OSTI)

Axial tomography from digitized real time radiographs provides a useful tool for industrial radiography and tomography. The components of this system are: x-ray source, image intensifier, video camera, video line extractor and digitizer, data storage and reconstruction computers. With this system it is possible to view a two dimensional x-ray image in real time at each angle of rotation and select the tomography plane of interest by choosing which video line to digitize. The digitization of a video line requires less than a second making data acquisition relatively short. Further improvements on this system are planned and initial results are reported.

Zolnay, A. S.; McDonald, W. M.; Doupont, P. A.; McKinney, R. L.; Lee, M. M.

1985-01-18T23:59:59.000Z

192

Carbon NanoTube Digital Electronics Workshop  

Science Conference Proceedings (OSTI)

Carbon NanoTube Digital Electronics Workshop. Purpose: To review and discuss the current status and potential benefits of carbon nanotubes in ...

2012-08-29T23:59:59.000Z

193

Axial tomography from digitized real time radiography  

SciTech Connect

Axial tomography from digitized real time radiographs provides a useful tool for industrial radiography and tomography. The components of this system are: x-ray source, image intensifier, video camera, video line extractor and digitizer, data storage and reconstruction computers. With this system it is possible to view a two dimensional x-ray image in real time at each angle of rotation and select the tomography plane of interest by choosing which video line to digitize. The digitization of a video line requires less than a second making data acquisition relatively short. Further improvements on this system are planned and initial results are reported.

Zolnay, A.S.; McDonald, W.M.; Doupont, P.A.; McKinney, R.L.; Lee, M.M.

1985-01-18T23:59:59.000Z

194

Digital Windows: cause + effect between reality + virtuality.  

E-Print Network (OSTI)

??Digital Windows allow real people in the real world to interact with virtual objects in a virtual world through a direct relationship between real-space and… (more)

Sumsion, F

2007-01-01T23:59:59.000Z

195

Digital Mapping Of Structurally Controlled Geothermal Features...  

Open Energy Info (EERE)

Gps Units And Pocket Computers Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Digital Mapping Of Structurally Controlled Geothermal Features With...

196

Digital Mapping Of Structurally Controlled Geothermal Features...  

Open Energy Info (EERE)

GPS Units And Pocket Computers Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Digital Mapping Of Structurally Controlled Geothermal Features...

197

Boulder County - Elevations Energy Loans Program (Colorado) | Department of  

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

Boulder County - Elevations Energy Loans Program (Colorado) Boulder County - Elevations Energy Loans Program (Colorado) Boulder County - Elevations Energy Loans Program (Colorado) < Back Eligibility Commercial Residential Savings Category Home Weatherization Commercial Weatherization Heating & Cooling Commercial Heating & Cooling Cooling Appliances & Electronics Sealing Your Home Ventilation Heating Heat Pumps Commercial Lighting Lighting Manufacturing Water Heating Windows, Doors, & Skylights Solar Buying & Making Electricity Program Info State Colorado Program Type Local Loan Program Rebate Amount Residential: $500 - $25,000 Commercial: $1,000 - $150,000 Provider Elevations Credit Union The Elevations Energy Loan can be used to finance a wide variety of efficiency and renewable energy projects in homes and businesses. Homes and

198

Importance of Elevation and Temperature Inversions for the Interpretation  

Open Energy Info (EERE)

Importance of Elevation and Temperature Inversions for the Interpretation Importance of Elevation and Temperature Inversions for the Interpretation of Thermal Infrared Satellite Images Used in Geothermal Exploration Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Importance of Elevation and Temperature Inversions for the Interpretation of Thermal Infrared Satellite Images Used in Geothermal Exploration Details Activities (1) Areas (1) Regions (0) Abstract: Examples of nighttime temperature inversions are shown in thermal infrared satellite images collected over the Coso geothermal field in eastern California. Temperature-elevation plots show the normal trend of temperature decrease with elevation, on which temperature inversions appear superimposed as opposite trends. Such inversions are common and they should

199

Traction sheave elevator, hoisting unit and machine space  

DOE Patents (OSTI)

Traction sheave elevator consisting of an elevator car moving along elevator guide rails, a counterweight moving along counterweight guide rails, a set of hoisting ropes (3) on which the elevator car and counterweight are suspended, and a drive machine unit (6) driving a traction sheave (7) acting on the hoisting ropes (3) and placed in the elevator shaft. The drive machine unit (6) is of a flat construction. A wall of the elevator shaft is provided with a machine space with its open side facing towards the shaft, the essential parts of the drive machine unit (6) being placed in the space. The hoisting unit (9) of the traction sheave elevator consists of a substantially discoidal drive machine unit (6) and an instrument panel (8) mounted on the frame (20) of the hoisting unit.

Hakala, Harri (Hyvinkaa, FI); Mustalahti, Jorma (Hyvinkaa, FI); Aulanko, Esko (Kerava, FI)

2000-01-01T23:59:59.000Z

200

Salticus: Guided Crawling for Personal Digital Libraries  

E-Print Network (OSTI)

In this paper, we describe Salticus, a web crawler that learns from users' web browsing activity. Salticus enables users to build a personal digital library by collecting documents and generalizing over the user's choices. Keywords personal digital library, business intelligence, web crawling, document acquisition 1.

Robin Burke

2001-01-01T23:59:59.000Z

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


201

Salticus: guided crawling for personal digital libraries  

Science Conference Proceedings (OSTI)

In this paper, we describe Salticus, a web crawler that learns from us ers web browsing activity. Salticus enables users to build a personal digital library by collecting documents and generalizing over the user's choices. Keywords: business intelligence, crawling, document acquisition, personal digital library

Robin Burke

2001-01-01T23:59:59.000Z

202

Light-weight communal digital libraries  

Science Conference Proceedings (OSTI)

We describe Kepler, a collection of light-weight utilities that allow for simple and quick digital library construction. Kepler bridges the gap between established, organization-backed digital libraries and groups of researchers that wish to publish ... Keywords: Documentation, Performance, Design

Kurt J. Maly; Michael L. Nelson; Mohammad Zubair; Ashraf Amrou; S. Kothasama; Lan Wang; Richard Luce

2004-06-01T23:59:59.000Z

203

A personalized recommender system for digital libraries  

Science Conference Proceedings (OSTI)

This paper presents the evaluation of a Recommender System for scientific articles in digital libraries. This system is geared towards the Computer Science scientific community. Technologically speaking, the proposed system was developed under the Semantic ... Keywords: digital library, recommender system, semantic web, user profile

Giseli Rabello Lopes; Maria Aparecida Martins Souto; Leandro Krug Wives; José Palazzo Moreira de Oliveira

2008-10-01T23:59:59.000Z

204

Reducing Unauthorized Modification of Digital Objects  

E-Print Network (OSTI)

-locking at the application package level (as is done in Android [11] ­ see §5.1), provides protection of such configuration Abstract--We consider the problem of malicious modification of digital objects. We present a protection mechanism designed to protect against unauthorized replacement or modification of digital objects while

Van Oorschot, Paul

205

Situating digital storytelling within African communities  

Science Conference Proceedings (OSTI)

We reflect on the methods, activities and perspectives we used to situate digital storytelling in two rural African communities in South Africa and Kenya. We demonstrate how in-depth ethnography in a village in the Eastern Cape of South Africa and a ... Keywords: Cross-cultural, Digital storytelling, ICT4D, Mobile devices, Oral knowledge, Rural

Thomas Reitmaier; Nicola J. Bidwell; Gary Marsden

2011-09-01T23:59:59.000Z

206

Perception and Digital Media in India  

Science Conference Proceedings (OSTI)

This essay analyzes the body politics at the center of both business services outsourcing labor also termed affective, immaterial, or communicative labor and the value-adding digital image in contemporary Indian media. The author uses a "media assemblage" ... Keywords: Affect, Digital Media, Electronic Commerce, India, Information Systems, Value Added

Amit S. Rai

2012-10-01T23:59:59.000Z

207

Digital video display systems and dynamic graphics  

Science Conference Proceedings (OSTI)

Most digital video display systems have been capable of producing only text or static imagery. This paper shows that these limitations are not intrinsic to the technology, but are rather a direct consequence of the display system architecture. The paper ... Keywords: Animated graphics, Computer animation, Digital video display, Dynamic graphics, Raster display, Raster graphics, Video display, Video raster system

Ronald Baecker

1979-08-01T23:59:59.000Z

208

Older adults as digital content producers  

Science Conference Proceedings (OSTI)

Older adults are normally characterized as consumers, rather than producers, of digital content. Current research concerning the design of technologies for older adults typically focuses on providing access to digital resources. Access is important, ... Keywords: older adults, social connection, user-generated content

Jenny Waycott; Frank Vetere; Sonja Pedell; Lars Kulik; Elizabeth Ozanne; Alan Gruner; John Downs

2013-04-01T23:59:59.000Z

209

A Free Exchange e-Marketplace for Digital Services.  

E-Print Network (OSTI)

??The digital era is witnessing a remarkable evolution of digital services. While the prospects are countless, the e-marketplaces of digital services are encountering inherent game-theoretic… (more)

Ghonaim, Wafa M. I.

2013-01-01T23:59:59.000Z

210

Elevated-Pressure Air Separation Unit...  

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

3-8 (2013). Liese, E.A. and S.E. Zitney, "A Dynamic Process Model of a Natural Gas Combined Cycle - Model Development with Startup and Shutdown Simulations," Proc. of the...

211

Federal Digital Strategy | Department of Energy  

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

Federal Digital Strategy Federal Digital Strategy Federal Digital Strategy New expectations require the Federal Government to be ready to deliver and receive digital information and services anytime, anywhere and on any device. It must do so safely, securely, and with fewer resources. To build for the future, the Federal Government has developed a Digital Strategy that embraces the opportunity to innovate more with less, and enables entrepreneurs to better leverage government data to improve the quality of services to the American people. The Energy Department has responded to this challenge through key initiatives that make high-value data sets available through API's that allow programmers to use data to reveal new opportunities and trends, websites that follow best practices for mobile design, and applications

212

Federal Digital Strategy | Department of Energy  

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

Federal Digital Strategy Federal Digital Strategy Federal Digital Strategy New expectations require the Federal Government to be ready to deliver and receive digital information and services anytime, anywhere and on any device. It must do so safely, securely, and with fewer resources. To build for the future, the Federal Government has developed a Digital Strategy that embraces the opportunity to innovate more with less, and enables entrepreneurs to better leverage government data to improve the quality of services to the American people. The Energy Department has responded to this challenge through key initiatives that make high-value data sets available through API's that allow programmers to use data to reveal new opportunities and trends, websites that follow best practices for mobile design, and applications

213

Requesting a Digital ID | Department of Energy  

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

Requesting a Digital ID Requesting a Digital ID Requesting a Digital ID Step One - Registering with MIS To request a DOE Digital Identity you must first register in DOE's Management Information System (MIS) by going to https://mis.doe.gov, selecting "Requesting Access" and following the onscreen instructions. Note: DOE Federal employees are already registered and do not need to complete this step, they may skip to step 2. During the registration process you will be required to search for, and select, a DOE sponsor. Your DOE sponsor is the DOE federal employee that is certifying that you have a recognized relationship with the Department and have a valid need for a DOE Digital Identity. For contractors this person is often your Contract Task Manager, Contracting Officer's Representatives

214

Digital Lumens | Open Energy Information  

Open Energy Info (EERE)

Lumens Lumens Jump to: navigation, search Name Digital Lumens Address 110 Canal Street Place Boston, Massachusetts Zip 02114 Product Intelligent Lighting System Year founded 2008 Number of employees 11-50 Phone number (617) 723-1200 Website http://www.digitallumens.com Coordinates 42.3644808°, -71.0602745° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.3644808,"lon":-71.0602745,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

215

The Digital Revolution in Measurements  

Science Conference Proceedings (OSTI)

This paper considers what it means to make a measurement, and the changes in measurement technology over the years. The impact of the latest changes, which have resulted in most electrical measurements being done digitally, is explored. It is argued that the process of measurement can be considered equivalent to one of data compression. The smart grid will certainly result in many more signals being made available, and therefore a great deal of data compression will be taking place. Measurements will be made in parts of the power system presently unmonitored, as well as parts that are already well covered by instrumentation. The smart grid engineer must decide what it means to have “useful” information. Unless care is taken, the signal processing may furnish information that is not useful, and may not even make sense. The paper concludes by examining the possibilities of data compression from multiple separate signals.

Kirkham, Harold

2013-02-27T23:59:59.000Z

216

e-Infrastructure and Digital Preservation: Challenges and Outlook  

E-Print Network (OSTI)

long- term preservation infrastructure adapted to the needsCalifornia e-Infrastructure and Digital Preservation:digital preservation infrastructure. Up to now, the existing

Altenhöner, Reinhard

2009-01-01T23:59:59.000Z

217

Research Library teams shares 2010 Digital Preservation Award  

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

2010 Digital Preservation Award Research Library teams shares 2010 Digital Preservation Award Winning for their development of Memento-a unique computer architecture that uses a...

218

Computing and fabricating multilayer models  

E-Print Network (OSTI)

We present a method for automatically converting a digital 3D model into a multilayer model: a parallel stack of high-resolution 2D images embedded within a semi-transparent medium. Multilayer models can be produced quickly ...

Holroyd, Michael

219

Importance of Elevation and Temperature Inversions for the Interpretat...  

Open Energy Info (EERE)

Importance of Elevation and Temperature Inversions for the Interpretation of Thermal Infrared Satellite Images Used in Geothermal Exploration Jump to: navigation, search GEOTHERMAL...

220

Design on Elevated-Temperature and Methanol-Blocking Proton ...  

Science Conference Proceedings (OSTI)

Presentation Title, Design on Elevated-Temperature and Methanol-Blocking Proton Exchange Membrane for Fuel Cell Application. Author(s), Yan Xiang.

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


221

An investigation of the role of digital libraries in bridging the digital divide in developing Arab countries: the case of Yarmouk University, Jordan.  

E-Print Network (OSTI)

??Developing countries are often said to suffer the disadvantages created by a ‘digital divide’ – the gap between the digitally advantaged and the digitally disadvantaged.… (more)

Obeidat, Othman

2009-01-01T23:59:59.000Z

222

Energy Savings Assessment for Digital-to-Analog Converter Boxes  

SciTech Connect

The Digital Television (DTV) Converter Box Coupon Program was administered by the U.S. government to subsidize purchases of digital-to-analog converter boxes, with up to two $40 coupons for each eligible household. In order to qualify as Coupon Eligible Converter Boxes (CECBs), these devices had to meet a number of minimum performance specifications, including energy efficiency standards. The Energy Star Program also established voluntary energy efficiency specifications that are more stringent than the CECB requirements. In this study, we measured the power and energy consumptions for a sample of 12 CECBs (including 6 Energy Star labeled models) in-use in homes and estimated aggregate energy savings produced by the energy efficiency policies. Based on the 35 million coupons redeemed through the end of the program, our analysis indicates that between 2500 and 3700 GWh per year are saved as a result of the energy efficiency policies implemented on digital-to-analog converter boxes. The energy savings generated are equivalent to the annual electricity use of 280,000 average US homes.

Cheung, Hoi Ying Iris; Meier, Alan; Brown, Richard

2011-01-18T23:59:59.000Z

223

Digital electronic bone growth stimulator  

DOE Patents (OSTI)

The present invention relates to the electrical treatment of biological tissue. In particular, the present invention discloses a device that produces discrete electrical pulse trains for treating osteoporosis and accelerating bone growth. According to its major aspects and broadly stated, the present invention consists of an electrical circuit configuration capable of generating Bassett-type waveforms shown with alternative signals provide for the treatment of either fractured bones or osteoporosis. The signal generator comprises a quartz clock, an oscillator circuit, a binary divider chain, and a plurality of simple, digital logic gates. Signals are delivered efficiently, with little or no distortion, and uniformly distributed throughout the area of injury. Perferably, power is furnished by widely available and inexpensive radio batteries, needing replacement only once in several days. The present invention can be affixed to a medical cast without a great increase in either weight or bulk. Also, the disclosed stimulator can be used to treat osteoporosis or to strengthen a healing bone after the cast has been removed by attaching the device to the patient`s skin or clothing.

Kronberg, J.W.

1993-01-01T23:59:59.000Z

224

Browsing and visualizing digital bibliographic data  

Science Conference Proceedings (OSTI)

Access to publications is provided by conventional libraries, digital libraries operated by learned societies or commercial publishers, and a huge number of web sites maintained by the scientists themselves or their institutions. But comprehensive meta-indices ...

Stefan Klink; Michael Ley; Emma Rabbidge; Patrick Reuther; Bernd Walter; Alexander Weber

2004-05-01T23:59:59.000Z

225

Materials Sustainability: Digital Resource Center -- Recycling - Steel  

Science Conference Proceedings (OSTI)

Use this area to submit digital resources and/or make comments on the resources posted by others. DO NOT use this area of the site to initiate discussion  ...

226

Finding related papers in literature digital libraries  

Science Conference Proceedings (OSTI)

This paper is about searching literature digital libraries to find "related" publications of a given publication. Existing approaches do not take into account publication topics in the relatedness computation, allowing topic diffusion across query output ...

Nattakarn Ratprasartporn; Gultekin Ozsoyoglu

2007-09-01T23:59:59.000Z

227

Materials Sustainability: Digital Resource Center -- Recycling ...  

Science Conference Proceedings (OSTI)

Use this area to submit digital resources and/or make comments on the resources posted by others. DO NOT use this area of the site to initiate discussion  ...

228

Radio frequency digital to analog converter  

E-Print Network (OSTI)

Dynamic performance of high speed, high resolution digital-to-analog converters (DACs) is limited by distortion at the data switching instants. Inter-symbol interference (ISI), imperfect timing synchronization and clock ...

Luschas, Susan, 1975-

2003-01-01T23:59:59.000Z

229

Advanced Digital Microscopy is Revolutionizing Failure Analysis  

Science Conference Proceedings (OSTI)

A variety of lighting options, like the High Dynamic Range (HDR) function, make digital microscopes ideal systems for imaging low-contrast and reflective targets. ... Incipient SCC Damage in Primary Loop Piping Using Fiber Optic Strain Gages.

230

SIP : a smart digital image processing library  

E-Print Network (OSTI)

The Smart Image Processing (SIP) library was developed to provide automated real-time digital image processing functions on camera phones with integer microprocessors. Many of the functions are not available on commercial ...

Zhou, Mengyao

2005-01-01T23:59:59.000Z

231

Buckets: Smart Objects for Digital Libraries  

Science Conference Proceedings (OSTI)

Current discussion of digital libraries (DLs) is often dominated by the merits of the respective storage, search and retrieval functionality of archives, repositories, search engines, search interfaces and database systems. While these technologies are ...

Nelson Michael L.

2001-08-01T23:59:59.000Z

232

Applying digital library technologies to nuclear forensics  

Science Conference Proceedings (OSTI)

Digital Libraries will enhance the value of forensic endeavors if they provide tools that enable data mining capabilities. In fact, collecting data without such tools can result in investigators becoming overwhelmed. Currently, the quantity of highly ...

Electra Sutton; Chloe Reynolds; Fredric C. Gey; Ray R. Larson

2012-09-01T23:59:59.000Z

233

Defining digital space through a visual language  

E-Print Network (OSTI)

Current approaches toward digital spaces mainly mimic the physical space that surrounds us. While this approach is valid in a wide range of applications and research, the goal of this thesis is to propose an alternative ...

Kilian, Axel, 1971-

2000-01-01T23:59:59.000Z

234

Digital Libraries and Document Image Analysis  

Science Conference Proceedings (OSTI)

The rapid growth of digital libraries (DLs) worldwideposes many new challenges for document image analysis(DIA) research and development. DLs promise to offermore people access to larger document collections, and atfar greater speed, than physical libraries ...

Henry S. Baird

2003-08-01T23:59:59.000Z

235

Integrated optical analog-to-digital converter  

E-Print Network (OSTI)

An optically-sampled frequency-demultiplexed wideband analog-to-digital converter (ADC) which has potential to exceed the performance of electronic ADCs by orders of magnitude is studied analytically and numerically. The ...

Khilo, Anatol

2008-01-01T23:59:59.000Z

236

Revealing your hand: caveats in implementing digital business strategy  

Science Conference Proceedings (OSTI)

Digital business strategies (DBS) offer significant opportunities for firms to enhance competitiveness. Unlike the large proprietary systems of the 1980s, today's "micro-applications" allow firms to create and reconfigure digital capabilities to appropriate ... Keywords: competitiveness, design, digital business strategy, digitization, flexibility, phasing

Varun Grover, Rajiv Kohli

2013-06-01T23:59:59.000Z

237

Co-authorship networks in the digital library research community  

Science Conference Proceedings (OSTI)

The field of digital libraries (DLs) coalesced in 1994: the first digital library conferences were held that year, awareness of the World Wide Web was accelerating, and the National Science Foundation awarded $24 Million (US) for the Digital Library ... Keywords: AuthorRank, Co-authorship, Digital library, Social network analysis

Xiaoming Liu; Johan Bollen; Michael L. Nelson; Herbert Van de Sompel

2005-12-01T23:59:59.000Z

238

Co-authorship networks in the digital library research community  

Science Conference Proceedings (OSTI)

The field of digital libraries (DLs) coalesced in 1994: the first digital library conferences were held that year, awareness of the World Wide Web was accelerating, and the National Science Foundation awarded $24 Million (US) for the Digital Library ... Keywords: authorrank, co-authorship, digital library, social network analysis

Xiaoming Liu; Johan Bollen; Michael L. Nelson; Herbert Van de Sompel

2005-12-01T23:59:59.000Z

239

Digital Libraries for the Next Millennium: Challenges and Research Directions  

Science Conference Proceedings (OSTI)

The unprecedented growth of Internet technologies has made resources on the World Wide Web instantly accessible to various user communities through digital libraries. Since the early 1990s, there have been several digital library initiatives sponsored ... Keywords: digital library, metadata management, resource harvesting, resource sharing, socioeconomic context of digital library, software agent

Sudha Ram; Jinsoo Park; Dongwon Lee

1999-07-01T23:59:59.000Z

240

An ecologically inspired simulation tool for managing digital ecosystems  

Science Conference Proceedings (OSTI)

In this paper we present an ecologically inspired multi-agent based simulation tool for finding and analysing networks of collaborations in a digital ecosystem. Digital ecosystems are defined as open, self-organising environments inside which digital ... Keywords: collaboration, complex networks, digital ecosystems, ecology, multi-agent systems, mutualism

Miguel Lurgi

2010-10-01T23:59:59.000Z

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


241

Characterization of a 16-Bit Digitizer for Lidar Data Acquisition  

E-Print Network (OSTI)

A 6-MHz 16-bit waveform digitizer was evaluated for use in atmospheric differential absorption lidar (DIAL) measurements of ozone. The digitizer noise characteristics were evaluated, and actual ozone DIAL atmospheric returns were digitized. This digitizer could replace computer-automated measurement and control (CAMAC)-based commercial digitizers and improve voltage accuracy. Introduction The waveform digitizer is a critical component of lidar detection systems; it transforms the analog detector output into a digital signal by measuring the signal voltage in a discrete time interval determined by an external clock. The accuracy of the digital voltage level increases with the digitizer bit level. Technology has advanced to the point where 8- and 12-bit waveform digitizers are commercially available and commonly used in computer-automated measurement and control (CAMAC) crates, which are readily interfaced to computer systems. These systems have worked well for ground and aircraft-borne...

Cynthia Williamson And; Cynthia K. Williamson; Russell J. De Young

2000-01-01T23:59:59.000Z

242

Security assessment of power systems including energy storage and with the integration of wind energy. Volume I. Digital transient simulation effort consulting Agreement No. 1. Final report  

DOE Green Energy (OSTI)

The purpose of the effort reported has been to adapt the MOD-2 simulation models for implementation on a digital transient stability program. This has involved: selection of an appropriate host program, examination of the host program interface, analysis of the analog models for digital implementation, FORTRAN coding of the model equations, installation and debugging on the host program, and final model verification. Synchronous machine equations are analyzed, with particular emphasis on numerical solution. (LEW)

Anderson, P. M.

1982-06-30T23:59:59.000Z

243

U-030: Apache Tomcat Lets Untrusted Web Applications Gain Elevated  

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

30: Apache Tomcat Lets Untrusted Web Applications Gain Elevated 30: Apache Tomcat Lets Untrusted Web Applications Gain Elevated Privileges U-030: Apache Tomcat Lets Untrusted Web Applications Gain Elevated Privileges November 9, 2011 - 8:30am Addthis PROBLEM: Apache Tomcat Lets Untrusted Web Applications Gain Elevated Privileges. PLATFORM: Apache Tomcat 7.0.0-7.0.21. ABSTRACT: An untrusted web application can access Manager application functions. reference LINKS: Apache Tomcat 7.x vulnerabilities SecurityTracker Alert ID: 1026295 CVE-2011-3376 IMPACT ASSESSMENT: Medium Discussion: A vulnerability was reported in Apache Tomcat. A local user (application) can obtain elevated privileges on the target system. A local web application (that is not trusted) can access Manager application functions without being marked as privileged. This can be exploited to obtain

244

City and County of Denver - Elevations Energy Loans Program (Colorado) |  

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

City and County of Denver - Elevations Energy Loans Program City and County of Denver - Elevations Energy Loans Program (Colorado) City and County of Denver - Elevations Energy Loans Program (Colorado) < Back Eligibility Commercial Residential Savings Category Home Weatherization Commercial Weatherization Heating & Cooling Commercial Heating & Cooling Cooling Appliances & Electronics Sealing Your Home Ventilation Heating Heat Pumps Commercial Lighting Lighting Manufacturing Water Heating Windows, Doors, & Skylights Solar Buying & Making Electricity Program Info State Colorado Program Type Local Loan Program Rebate Amount Residential: $500 - $25,000 Commercial: $1,000 - $150,000 Provider Elevations Credit Union The Elevations Energy Loan can be used to finance a wide variety of efficiency and renewable energy projects in homes and businesses. Homes and

245

Methods and systems for detecting abnormal digital traffic  

DOE Patents (OSTI)

Aspects of the present invention encompass methods and systems for detecting abnormal digital traffic by assigning characterizations of network behaviors according to knowledge nodes and calculating a confidence value based on the characterizations from at least one knowledge node and on weighting factors associated with the knowledge nodes. The knowledge nodes include a characterization model based on prior network information. At least one of the knowledge nodes should not be based on fixed thresholds or signatures. The confidence value includes a quantification of the degree of confidence that the network behaviors constitute abnormal network traffic.

Goranson, Craig A [Kennewick, WA; Burnette, John R [Kennewick, WA

2011-03-22T23:59:59.000Z

246

Digital artifacts as legacy: exploring the lifespan and value of digital data  

Science Conference Proceedings (OSTI)

Legacy is the meaningful and complex way in which information, values, and possessions are passed on to others. As digital systems and information become meaningfully parts of people's everyday and social relationships, it is essential to develop new ... Keywords: design, digital artifacts, inheritance, interviews, legacy, reflective design, speculative design, technology probes

Rebecca Gulotta; William Odom; Jodi Forlizzi; Haakon Faste

2013-04-01T23:59:59.000Z

247

Model interoperability in building information modelling  

Science Conference Proceedings (OSTI)

The exchange of design models in the design and construction industry is evolving away from 2-dimensional computer-aided design (CAD) and paper towards semantically-rich 3-dimensional digital models. This approach, known as Building Information Modelling ... Keywords: Building Information Modelling, Interoperability

Jim Steel; Robin Drogemuller; Bianca Toth

2012-02-01T23:59:59.000Z

248

Digitally programmable signal generator and method  

DOE Patents (OSTI)

A digitally programmable waveform generator for generating completely arbitrary digital or analog waveforms from very low frequencies to frequencies in the gigasample per second range. A memory array with multiple parallel outputs is addressed; then the parallel output data is latched into buffer storage from which it is serially multiplexed out at a data rate many times faster than the access time of the memory array itself. While data is being multiplexed out serially, the memory array is accessed with the next required address and presents its data to the buffer storage before the serial multiplexing of the last group of data is completed, allowing this new data to then be latched into the buffer storage for smooth continuous serial data output. In a preferred implementation, a plurality of these serial data outputs are paralleled to form the input to a digital to analog converter, providing a programmable analog output.

Priatko, Gordon J. (Oakland, CA); Kaskey, Jeffrey A. (San Leandro, CA)

1989-01-01T23:59:59.000Z

249

Archives and History Office: Digital Resources  

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

Resources > Digital Resources Resources > Digital Resources Digital Resources Informal History, Part 1 The Histories page provides publications that examine SLAC history or particular events, experiments, and equipment. Publications are listed in reverse chronological order (i.e. newest listed first). Edward L. Ginzton and the MARK III accelerator at Stanford University as it nears its completion in 1952. Copies of Stanford University Physics Department Project M Reports held by the SLAC Archives and History Office, including those produced by the Microwave Lab, and the High-Energy Physics Lab (HEPL) have been scanned and are now available online. Linac construction site showing curved and straight sections in rain and mud, 1963. Copies of ABA reports held by the SLAC Archives have been scanned and are now available online along with a list of ABA numbered reports relating to the development of the SLAC proposal and known to the SLAC Archives and History Office.

250

Lidar Observation of Elevated Pollution Layers over Los Angeles  

Science Conference Proceedings (OSTI)

Elevated pollution layers are observed over Los Angeles with an aircraft equipped with a downward-looking lidar. For the first time, detailed ancillary upper-air kinematic and thermodynamic data were collected simultaneously to aid in the ...

Roger M. Wakimoto; James L. McElroy

1986-11-01T23:59:59.000Z

251

Property:Building/SPElectrtyUsePercElevators | Open Energy Information  

Open Energy Info (EERE)

SPElectrtyUsePercElevators SPElectrtyUsePercElevators Jump to: navigation, search This is a property of type String. Elevators Pages using the property "Building/SPElectrtyUsePercElevators" Showing 25 pages using this property. (previous 25) (next 25) S Sweden Building 05K0001 + 0.0 + Sweden Building 05K0002 + 0.125907012528 + Sweden Building 05K0003 + 7.93251470469 + Sweden Building 05K0004 + 0.0177143892458 + Sweden Building 05K0005 + 0.0 + Sweden Building 05K0006 + 0.0 + Sweden Building 05K0007 + 1.06750770532 + Sweden Building 05K0008 + 0.461813811056 + Sweden Building 05K0009 + 0.11704275811 + Sweden Building 05K0010 + 0.0 + Sweden Building 05K0011 + 0.0 + Sweden Building 05K0012 + 0.0 + Sweden Building 05K0013 + 0.237557009519 + Sweden Building 05K0014 + 1.64859225677 +

252

On Computing the Surface Horizontal Pressure Gradient over Elevated Terrain  

Science Conference Proceedings (OSTI)

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

Maurice Danard

1989-06-01T23:59:59.000Z

253

Determination of Radiosonde Station Elevation from Observational Data  

Science Conference Proceedings (OSTI)

Correct radiosonde station elevation (balloon release height) is important in quality control of radiosonde soundings. Incorrect heights introduce errors in calculated temperature trends and numerical forecasts. Radiosonde metadata frequently ...

Oleg A. Alduchov; Robert E. Eskridge

2002-04-01T23:59:59.000Z

254

The effect of smoke from plastics on digital communications equipment  

SciTech Connect

Smoke from plastics can cause immediate problems in electrical equipment in the form of shorting and increased leakage currents, as well as long-term corrosion (metal loss). The short-term problems can be especially serious for critical control instrumentation such as that found in nuclear reactors or telecommunications systems. The US Nuclear Regulatory Commission and Sandia National Laboratories are sponsoring a program to determine the modes and probabilities of digital equipment failure during exposure to smoke and up to 24 hours after the exposure. Early tests on computer systems have shown that the most common immediate problems are temporary and are likely to be caused by increased leakage currents. High-voltage circuits are especially vulnerable since the charged particles in smoke are drawn to those surfaces. To study failure probabilities, smoke exposure tests with real-time measurements will be carried out to determine how the electrical properties of the environment are affected by smoke concentration and content. Digital communication cable will be included in the tests because temporary shorts that cannot be detected through dc measurements may cause interruptions in communications between computers. The reaction of the equipment to changed electrical properties of the environment will be modeled. Equipment that can be used for testing and modeling is being solicited.

Tanaka, T.J. [Sandia National Labs., Albuquerque, NM (United States). Accident and Consequence Analysis Dept.; Chapin, J.T. [Lucent Technologies, Norcross, GA (United States). Bell Labs.

1998-07-01T23:59:59.000Z

255

PWR Field Experience with Elevated, Constant pH  

Science Conference Proceedings (OSTI)

This report analyzes chemistry data from several pressurized water reactors (PWRs) operating reactor coolant with elevated, constant pH to determine its effectiveness for managing core performance and dose rate problems stemming from corrosion product and activity transport. The operating data are supplemented with relevant shutdown and startup experience to identify the overall impact of elevated, constant pH on primary system operation.

2001-12-06T23:59:59.000Z

256

PaperView: augmenting physical surfaces with location-aware digital information  

Science Conference Proceedings (OSTI)

A frequent need of museums is to provide visitors with context-sensitive information about exhibits in the form of maps, or scale models. This paper suggests an augmented-reality approach for supplementing physical surfaces with digital information, ... Keywords: interaction design, interactive museum exhibits, magic lens

Dimitris Grammenos; Damien Michel; Xenophon Zabulis; Antonis A. Argyros

2011-01-01T23:59:59.000Z

257

EFFECTS OF ELEVATED CO2 ON ROOT FUNCTION AND SOIL RESPIRATION IN A MOJAVE DESERT ECOSYSTEM  

DOE Green Energy (OSTI)

Increases in atmospheric CO{sub 2} concentration during the last 250 years are unequivocal, and CO{sub 2} will continue to increase at least for the next several decades (Houghton et al. 2001, Keeling & Whorf 2002). Arid ecosystems are some of the most important biomes globally on a land surface area basis, are increasing in area at an alarming pace (Dregne 1991), and have a strong coupling with regional climate (Asner & Heidebrecht 2005). These water-limited ecosystems also are predicted to be the most sensitive to elevated CO{sub 2}, in part because they are stressful environments where plant responses to elevated CO{sub 2} may be amplified (Strain & Bazzaz 1983). Indeed, all C{sub 3} species examined at the Nevada Desert FACE Facility (NDFF) have shown increased A{sub net} under elevated CO{sub 2} (Ellsworth et al. 2004, Naumburg et al. 2003, Nowak et al. 2004). Furthermore, increased shoot growth for individual species under elevated CO{sub 2} was spectacular in a very wet year (Smith et al. 2000), although the response in low to average precipitation years has been smaller (Housman et al. 2006). Increases in perennial cover and biomass at the NDFF are consistent with long term trends in the Mojave Desert and elsewhere in the Southwest, indicating C sequestration in woody biomass (Potter et al. 2006). Elevated CO{sub 2} also increases belowground net primary production (BNPP), with average increases of 70%, 21%, and 11% for forests, bogs, and grasslands, respectively (Nowak et al. 2004). Although detailed studies of elevated CO{sub 2} responses for desert root systems were virtually non-existent prior to our research, we anticipated that C sequestration may occur by desert root systems for several reasons. First, desert ecosystems exhibit increases in net photosynthesis and primary production at elevated CO{sub 2}. If large quantities of root litter enter the ecosystem at a time when most decomposers are inactive, significant quantities of carbon may be stored belowground in relatively recalcitrant forms. Indeed, a model-based analysis predicted that the arid/semiarid southwestern bioclimatic region had one of the highest rates of net carbon storage in the United States over the past century (Schimel et al. 2000). Second, root systems of desert plants are often extensive (Foxx et al. 1984, Hartle et al. 2006) with relatively large proportions of roots deep in the soil (Schenk & Jackson 2002). Thus, an understanding of belowground processes in desert ecosystems provides information on the potential for terrestrial carbon sequestration in desert ecosystems.

Nowak, Robert S.

2007-12-19T23:59:59.000Z

258

DIY Media: Digital Literacies and Learning through Popular Cultural Production  

Science Conference Proceedings (OSTI)

Schools remain notorious for co-opting digital technologies to business as usual approaches to teaching new literacies. DIY Media addresses this issue head-on, and describes expansive and creative practices of digital literacy that are increasingly influential ...

Michele Knobel; Colin Lankshear

2010-02-01T23:59:59.000Z

259

Record for pi : 206 billion decimal digits - CECM  

E-Print Network (OSTI)

... digits difference. Then we are declaring 206,158,430,000 decimal digits as the new world record. (More details soon at http://pi2.cc.u-tokyo.ac.jp/index.html) ...

260

Direct Digital Control for Building HVAC Systems, 2nd edition  

Science Conference Proceedings (OSTI)

From the Publisher:Direct Digital Control for Building HVAC Systems, Second Edition, is thoroughly updated and expanded to include complete coverage of the architecture of modern digital control systems, distributed intelligence networked systems, communication ...

Michael J. L. Coffin

1998-06-01T23:59:59.000Z

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


261

T-711: Fraudulent Google Digital Certificates Could Allow Man...  

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

11: Fraudulent Google Digital Certificates Could Allow Man-in-the-Middle Attacks T-711: Fraudulent Google Digital Certificates Could Allow Man-in-the-Middle Attacks September 7,...

262

Determining the Publication Impact of a Digital Library  

Science Conference Proceedings (OSTI)

We attempt to assess the publicatin impact of a digital library (DL) of aerospace scientific and technical information (STI). The Langley Technical Report Server (LTRS) is a digital library of over 1,400 electronic publications authored by NASA Langley ...

Kaplan Nancy R.; Nelson Michael L.

2000-01-01T23:59:59.000Z

263

Content value chains modelling using a copyright ontology  

Science Conference Proceedings (OSTI)

Existing digital rights management (DRM) systems, initiatives like Creative Commons or research works as some digital rights ontologies provide limited support for content value chains modelling and management. This is becoming a critical issue as content ... Keywords: Content value chain, Copyright, Digital rights management, Ontology, Reasoning

Roberto García; Rosa Gil

2010-06-01T23:59:59.000Z

264

A new aspect in robust digital watermarking  

Science Conference Proceedings (OSTI)

Generally, in watermarking scheme the size of the watermark is very small when compare to host image. On the contrary, this is an attempt in which a new watermarking scheme is presented where the size of host image is very small when compare with watermark ... Keywords: Digital watermarking, Normalized mass matrix, Oversampling, Singular value decomposition, Stationary wavelet transform

Gaurav Bhatnagar; Q. M. Wu; Balasubramanian Raman

2013-09-01T23:59:59.000Z

265

Columbia University Libraries Preservation & Digital Conversion Division  

E-Print Network (OSTI)

Columbia University Libraries Preservation & Digital Conversion Division Disaster Response Manual for Care of Library Materials 2008 Edition #12;CUL Disaster Response Manual 2008 2 TABLE OF CONTENTS page. Disaster Response Coordinators List 31 B. Disaster Supply Center List 32 C. Vendor List 33 D. LSO

Salzman, Daniel

266

Digital Camera System on a Chip  

Science Conference Proceedings (OSTI)

Since the early 1990s, there has been an explosion of activity in the area of CMOS image sensors. Up until recently, the dominant and nearly only solid-state image sensor technology was the charge-coupled device (CCD). However, most microprocessors, ... Keywords: charge-coupled devices, signal processing, image sensors, CMOS, digital cameras

Eric R. Fossum

1998-05-01T23:59:59.000Z

267

Battery-Powered Digital CMOS Massoud Pedram  

E-Print Network (OSTI)

1 Page 1 USC Low Power CAD Massoud Pedram Battery-Powered Digital CMOS Design Massoud Pedram Power CAD Massoud Pedram Motivation Extending the battery service life of battery-powered micro in the VLSI circuit Y The battery system is assumed to be an ideal source that delivers a fixed amount

Pedram, Massoud

268

Digitization Noise in Power Spectral Analysis  

Science Conference Proceedings (OSTI)

It is well-known that the digitization noise variance is ?2/12 for a continuous time series sampled with the signal resolution ?. It is also generally accepted that this variance often has a white-power spectral density. We have examined in ...

L. Kristensen; P. Kirkegaard

1987-06-01T23:59:59.000Z

269

Developing digital cartography in rural planning applications  

Science Conference Proceedings (OSTI)

The main objective of the present study is to develop an efficient methodology at a reasonable cost, that will allow the use of the latest technological developments in the areas of image analysis and geographical information systems (GIS) for the generation, ... Keywords: Cartography updating, Digital aerial photogrammetry, GIS, High resolution satellite, Rural planning and development

Fernando J. Aguilar; Fernando Carvajal; Manuel A. Aguilar; Francisco Agüera

2007-02-01T23:59:59.000Z

270

Digital radiographic systems detect boiler tube cracks  

SciTech Connect

Boiler water wall leaks have been a major cause of steam plant forced outages. But conventional nondestructive evaluation techniques have a poor track record of detecting corrosion fatigue cracking on the inside surface of the cold side of waterwall tubing. EPRI is performing field trials of a prototype direct-digital radiographic system that promises to be a game changer. 8 figs.

Walker, S. [EPRI, Charlotte, NC (United States)

2008-06-15T23:59:59.000Z

271

Making digital leaf collages with blow painting!  

Science Conference Proceedings (OSTI)

We present a novel play interface called Blow Painting that enables people to create leaf collage paintings on a digital canvas by blowing at a toy windmill. The toy windmill detects the blowing action and direction with its embedded microphone and rotation ... Keywords: blowing, collage, daily experience, embodiment, interaction, leaf stencils, painting, play, rfid, tangible object

Yang-Ting Shen; Ellen Yi-Luen Do

2010-01-01T23:59:59.000Z

272

On random sampling auctions for digital goods  

Science Conference Proceedings (OSTI)

In the context of auctions for digital goods, an interesting Random Sampling Optimal Price auction (RSOP) has been proposed by Goldberg, Hartline and Wright; this leads to a truthful mechanism. Since random sampling is a popular approach for auctions ... Keywords: auction, mechanism design, random sampling

Saeed Alaei; Azarakhsh Malekian; Aravind Srinivasan

2009-07-01T23:59:59.000Z

273

The Design of A Digital IC for Thyristor Triggering  

Science Conference Proceedings (OSTI)

This paper presents the functional description and the design of a fully digital integrated circuit for thyristor firing control in a 1 /spl mu/m CMOS technology. The architecture is based on the equidistant firing method, which allows the change of ... Keywords: CMOS digital integrated circuits, digital IC, thyristor triggering, digital integrated circuit, thyristor firing control, CMOS technology, equidistant firing method, DTC06 IC, 1 micron

T. C. Pimenta; L. L. G. Vermaas; P. C. Crepaldi; R. L. Moreno

1997-01-01T23:59:59.000Z

274

The FIPS 186-4 Digital Signature Algorithm Validation System ...  

Science Conference Proceedings (OSTI)

... pass for formal validation, and general instruction for interfacing ... 5 Design Philosophy of the Digital Signature Algorithm Validation System ...

2013-09-17T23:59:59.000Z

275

Magnesium: Digital Resource Center - ARTICLE: Safe Machining of ...  

Science Conference Proceedings (OSTI)

Sep 7, 2007... Other ==== Miscellaneous Digital Resources in Magnesium. Spacer ... Topic Title: ARTICLE: Safe Machining of Magnesium Parts by Cutting ...

276

Energy Efficient Digital Logic Using Nanoscale Magnetic Devices  

E-Print Network (OSTI)

the power consumption of future digital logic devices. Theimpact of device scaling on power consumption [6, 7].

Lambson, Brian

2013-01-01T23:59:59.000Z

277

Optimal Elevation and Configuration of Hanford's Double-Shell Tank Waste Mixer Pumps  

SciTech Connect

The objective of this study was to compare the mixing performance of the Lawrence pump, which has injection nozzles at the top, with an alternative pump that has injection nozzles at the bottom, and to determine the optimal elevation for the alternative pump. Sixteen cases were evaluated: two sludge thicknesses at eight levels. A two-step evaluation approach was used: Step 1 to evaluate all 16 cases with the non-rotating mixer pump model and Step 2 to further evaluate four of those cases with the more realistic rotating mixer pump model. The TEMPEST code was used.

Onishi, Yasuo; Yokuda, Satoru T.; Majumder, Catherine A.

2002-05-15T23:59:59.000Z

278

DIGITAL STANDARDS BIBLIOGRAPHY VERSION 2.0: EXPOSURE DRAFT  

E-Print Network (OSTI)

The Collections Council of Australia Ltd is supported by the Cultural Ministers Council. The Bibliography of Digital Standards is a preliminary list of standards and guidelines that inform and assist the creation and management of digital collections. The Bibliography was initially published as part of the Collection Council of Australia’s Summit on Digital Collections: Working Papers in August 2007. It is currently

Collections Council

2008-01-01T23:59:59.000Z

279

The digital divide and e-government services  

Science Conference Proceedings (OSTI)

There is much research examining the digital divide and what it looks like in society. This research often describes the digital divide as yet another symptom of the current socio-economic division in our society. Based on this research, one would expect ... Keywords: digital divide, e-governance, e-government, internet, mobile divide, public assistance, socio-economic, welfare

Thad E. Hall; Jennifer Owens

2011-09-01T23:59:59.000Z

280

Digital homes on wheels: designing for the unimagined home  

Science Conference Proceedings (OSTI)

Design for the digital home is often predicated on an ideal, imagined domestic space that is expansive, stable, occupied by a "busy" nuclear family, and does not always match existing, real-life digital homes. Using American retirees living full time ... Keywords: Design, Digital Home, Ethnography, Mobility, Recreational vehicle

Alexandra Zafiroglu; Michele Chang

2007-06-01T23:59:59.000Z

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


281

Effects of Vegetation Structure and Elevation on Lower Keys Marsh Rabbit Density  

E-Print Network (OSTI)

The Lower Keys marsh rabbit (Sylvilagus palustris hefneri, LKMR), 1 of 3 subspecies of Sylvilagus palustris, is endemic to the Lower Florida Keys. The LKMR is listed as an endangered species due to predation by feral and free roaming domestic cats (Felis catus) and raccoons (Procyon lotor), road mortality, effects of storm surges, sea level rise, the small declining metapopulation size, and possible habitat loss from hardwood encroachment. The purpose of this study was to determine the current LKMR density on lands managed by the United States Navy, Naval Air Station Key West and evaluate how vegetation structure and patch elevation effect LKMR population density. I conducted fecal pellet counts to determine LKMR density, collected vegetation data using percent composition of ground cover, Robel range pole, and point-centered quarter methods, and obtained data on patch area and elevation. I used simple linear regression to assess the relationship between LKMR density and 9 measured vegetation characteristics, patch area, and patch elevation to determine which variables have an influence on LKMR density and the relationship between them. In my examination of the simple regression models, 6 out of the 11 variables appeared to influence LKMR population density. The average per patch percent composition of nonliving material and grasses, maximum height of vegetation at the range pole, distance to nearest woody vegetation, patch elevation, and visual obstruction readings (VOR) individually accounted for 26.4%, 30.4% , 18.1%, 8.5%, 6.8%, and 1.4% of the variability in LKMR density, respectively. According to the regression models, LKMR density increased in patches with greater amounts of grasses and with greater distance to woody vegetation. Habitat management is vital to the recovery of the LKMR and needs to focus on providing greater amounts of grasses and reducing the amount of woody vegetation encroachment to enhance LKMR population density.

Dedrickson, Angela

2011-12-01T23:59:59.000Z

282

Forest soil carbon inventories and dynamics along an elevation gradient in the southern Appalachian Mountains  

Science Conference Proceedings (OSTI)

Soil organic carbon (SOC) was partitioned between unprotected and protected pools in six forests along an elevation gradient in the southern Appalachian Mountains using two physical methods: flotation in aqueous CaCl{sub 2} (1.4 g/mL) and wet sieving through a 0.053 mm sieve. Both methods produced results that were qualitatively and quantitatively similar. Along the elevation gradient, 28 to 53% of the SOC was associated with an unprotected pool that included forest floor O-layers and other labile soil organic matter (SOM) in various stages of decomposition. Most (71 to 83%) of the C in the mineral soil at the six forest sites was identified as protected because of its association with a heavy soil fraction (> 1.4 g/mL) or a silt-clay soil fraction. Total inventories of SOC in the forests (to a depth of 30 cm) ranged from 384 to 1244 mg C/cm{sup 2}. The turnover time of the unprotected SOC was negatively correlated (r = -0.95, p < 0.05) with mean annual air temperature (MAT) across the elevation gradient. Measured SOC inventories, annual C returns to the forest floor, and estimates of C turnover associated with the protected soil pool were used to parameterize a simple model of SOC dynamics. Steady-state predictions with the model indicated that, with no change in C inputs, the low- (235-335 m), mid- (940-1000 m), and high- (1650-1670 m) elevation forests under study might surrender {approx} 40 to 45% of their current SOC inventory following a 4 C increase in MAT. Substantial losses of unprotected SOM as a result of a warmer climate could have long-term impacts on hydrology, soil quality, and plant nutrition in forest ecosystems throughout the southern Appalachian Mountains.

Garten Jr, Charles T [ORNL; Post, Wilfred M [ORNL; Hanson, Paul J [ORNL; Cooper, Lee W [ORNL

1999-05-01T23:59:59.000Z

283

The Digital Geography Lab at Salem State University: The Evolution of One of the Oldest Educational Digital Geospatial Labs  

Science Conference Proceedings (OSTI)

Established in 1983, the Digital Geography Lab (DGL) at Salem State University (SSU) is one of the oldest higher-education digital spatial labs. This paper details the evolution of the DGL as well as its current status as one of the best computer labs ... Keywords: Computer Lab, Digital Geography Lab (DGL), GIS, Geography, Higher Education

Stephen S. Young; Kym Pappathanasi

2012-07-01T23:59:59.000Z

284

Florida Billboards Elevate Renewable Energy Education | Department of  

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

Florida Billboards Elevate Renewable Energy Education Florida Billboards Elevate Renewable Energy Education Florida Billboards Elevate Renewable Energy Education July 9, 2010 - 10:26am Addthis A wind turbine tops a Lamar Advertising billboard in Pensacola, Florida | Photo courtesy of Karena Cawthon A wind turbine tops a Lamar Advertising billboard in Pensacola, Florida | Photo courtesy of Karena Cawthon Maya Payne Smart Former Writer for Energy Empowers, EERE Drivers along the Florida stretches of I-10, I-110, I-75 and other highways will soon see more than advertising messages on roadside signs. Lamar Advertising is converting almost 1500 of its Florida billboards to renewable energy devices. Solar panels and wind turbines will top the displays. The company hopes to communicate the value of renewable energy to millions

285

Metadata for Digital Libraries: Architecture and Design Rationale \\Lambda Michelle Baldonado ChenChuan K. Chang Luis Gravano  

E-Print Network (OSTI)

, the full text of #12; a textual document would be included as the value of its Full Text attribute, interoperabil­ ity, attribute model, attribute model translation, meta­ data repository, InfoBus, proxy this information metadata. In an earlier paper [1], we analyzed the needs of our digital library InfoBus archi

Gravano, Luis

286

Practical Maintenance of Digital Systems: Guidance to Maximize the Benefits of Digital Technology for the Maintenance of Digital Sys tems and Plant Equipment  

Science Conference Proceedings (OSTI)

For operators to take maximum advantage of digital technology being implemented in nuclear power plants, they must reduce the cost and likelihood of human errors in maintenance and testing of new digital systems and human-system interfaces (HSIs). Designing for maintenance and testing is a fundamental part of the design effort for any plant system -- and digital upgrade modifications are no exception. This report provides guidance for plant operators and designers for achieving cost-effective maintainabi...

2004-10-11T23:59:59.000Z

287

Processing of 3-Line Imagery on a Digital Photogrammetric Workstation  

E-Print Network (OSTI)

One of the main topics in photogrammetry is the development of automatic processing techniques, e.g. for aerotriangulation and stereo restitution, both starting from digital aerial imagery. On the other hand digital cameras and sensors gain more and more importance. One of the most promising sensor concept makes use of three linear CCD arrays. This paper deals with the special geometry of 3-line imagery and the consequences for the processing on a digital photogrammetric workstation. Keywords: digital photogrammetric workstations, 3-line imagery, stereo restitution, MOMS-02 1. INTRODUCTION Digital photogrammetric systems are still one of the main topics in ISPRS Commission II. During the period 1992-- 1996 the Intercommision Working Group II/III "Digital Photogrammetric Systems" dealt with this research topic, and also in the period 1996--2000 the ISPRS Working Group II/8 "Digital Systems for Image Analysis" will consider systems for automatic image orientation, generation of digita...

Rüdiger Brand; Timm Ohlhof; Manfred Stephani

1997-01-01T23:59:59.000Z

288

A New Digital Lighting Control System  

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

A New Digital Lighting Control System A New Digital Lighting Control System Speaker(s): Charles Knuffke Date: June 29, 2010 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Francis Rubinstein When various Lighting Controls components are discussed, they're usually slotted into separate "silos" - Occupancy Sensors, Relay Panels, Dimming Controls, and Daylighting Controls. Trying to combine two or more of these into a single system usually requires a fair amount of technical expertise and often help from different manufacturers. Combine that with the need under LEED to get these systems commissioned, often without detailed sequence of operation information, and that helps to explains why many view Lighting Controls as overly complex. And try to integrate the Lighting Controls into a larger overall building management system so their

289

Digitally programmable signal generator and method  

DOE Patents (OSTI)

A digitally programmable signal generator (DPSG) and method are disclosed. The DPSG can be used in applications such as Atomic Vapor Laser Isotope Separation (AVLIS) to create an optimal match between the process laser's spectral profile and that of the vaporized material. Other applications include optical telecommunications, non-optical telecommunication in the microwave and radio spectrum, radar, electronic countermeasures, high speed computer interconnects, local area networks, high definition video transport and the multiplexing of large quantities of slow digital memory into high speed data streams. This invention extends the operation of DPSGs into the GHz range, while preserving all of the current art's DPSGs' operational features.

Priatko, G.J.; Kaskey, J.A.

1986-09-02T23:59:59.000Z

290

Fundamental concepts of digital image processing  

SciTech Connect

The field of a digital-image processing has experienced dramatic growth and increasingly widespread applicability in recent years. Fortunately, advances in computer technology have kept pace with the rapid growth in volume of image data in these and other applications. Digital image processing has become economical in many fields of research and in industrial and military applications. While each application has requirements unique from the others, all are concerned with faster, cheaper, more accurate, and more extensive computation. The trend is toward real-time and interactive operations, where the user of the system obtains preliminary results within a short enough time that the next decision can be made by the human processor without loss of concentration on the task at hand. An example of this is the obtaining of two-dimensional (2-D) computer-aided tomography (CAT) images. A medical decision might be made while the patient is still under observation rather than days later.

Twogood, R.E.

1983-03-01T23:59:59.000Z

291

Measuring microfocus focal spots using digital radiography  

SciTech Connect

Measurement of microfocus spot size can be important for several reasons: (1) Quality assurance during manufacture of microfocus tubes; (2) Tracking performance and stability of microfocus tubes; (3) Determining magnification (especially important for digital radiography where the native spatial resolution of the digital system is not adequate for the application); (4) Knowledge of unsharpness from the focal spot alone. The European Standard EN 12543-5 is based on a simple geometrical method of calculating focal spot size from unsharpness of high magnification film radiographs. When determining microfocus focal spot dimensions using unsharpness measurements both signal-to-noise (SNR) and magnification can be important. There is a maximum accuracy that is a function of SNR and therefore an optimal magnification. Greater than optimal magnification can be used but it will not increase accuracy.

Fry, David A [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

292

TRAINING SEMINARS OFFERED DIGITAL TROUBLESHOOTING VIDEOTAPES AVAILABLE  

E-Print Network (OSTI)

Hewlett-Packard is offering a series of seminars for service technicians. Some of these are very general (such as Digital Troubleshooting), while others apply to a specific product. Since this is of such significance to service personnel, the September-October and November-December issue of BENCH BRIEFS e has been combined into a special double issue on service training. A number of locations have been chosen for seminars in January and February, 1976. See the following pages for details of course offerings and locations. Most seminars include laboratory time to allow hands-on experience with the hardware. To ensure individual attention for the attendees, all seminars are limited in size. We suggest registering early to avoid disappointment. Registration will be handled on a first-come firstserved basis. Many of these seminars are available at your facility at reduced rates for large groups. Please inquire for details. NOTE: While these seminars are being held only in the U.S. and Canada, readers in other countries will be interested to know that service training seminars are being planned for several additional locations throughout the world. We encourage your comments. Please lcontact your local HP sales engineer or write directly to the BENCH BRIEFS Editor at the address on the last page. A series of fourteen videotapes is available to help train service personnel on the increasingly encompassing area of digital electronics. Each of the videotapes is less than 30 minutes in length. The tapes were prepared by Dick Gasperini, BENCH BRIEFS Editor, who has repeatedly presented and revised the material in live seminars throughout the world. The information in the videotape series and in the textbook is very similar to the first two days of the Digital Troubleshooting seminar described on the next page. The individual tapes are: 1. Digital vs Analog (17 min) 2. RTL and DTL (16 min)

unknown authors

1975-01-01T23:59:59.000Z

293

Digital computer operation of a nuclear reactor  

DOE Patents (OSTI)

A method is described for the safe operation of a complex system such as a nuclear reactor using a digital computer. The computer is supplied with a data base containing a list of the safe state of the reactor and a list of operating instructions for achieving a safe state when the actual state of the reactor does not correspond to a listed safe state, the computer selects operating instructions to return the reactor to a safe state.

Colley, R.W.

1982-06-29T23:59:59.000Z

294

Digital computer operation of a nuclear reactor  

DOE Patents (OSTI)

A method is described for the safe operation of a complex system such as a nuclear reactor using a digital computer. The computer is supplied with a data base containing a list of the safe state of the reactor and a list of operating instructions for achieving a safe state when the actual state of the reactor does not correspond to a listed safe state, the computer selects operating instructions to return the reactor to a safe state.

Colley, Robert W. (Richland, WA)

1984-01-01T23:59:59.000Z

295

Proceedings: Distributed Digital Systems, Plant Process  

Science Conference Proceedings (OSTI)

A workshop on Distributed Digital Systems, Plant Process Computers, and Networks was held in Charlotte, North Carolina on August 16-18, 1994. The purpose of the workshop was to provide a forum for technology transfer, technical information exchange, and education. The workshop was attended by more than 100 representatives of electric utilities, equipment manufacturers, engineering service organizations, and government agencies. The workshop consisted of three days of presentations, exhibitions, a panel d...

1995-03-31T23:59:59.000Z

296

Handbook on Regression Testing of Digital Systems  

Science Conference Proceedings (OSTI)

Even after established use in power plants, digital monitoring, control, and protection systems typically undergo necessary changes to fix defects, make necessary improvements to functionality, and adapt to the evolution of commercially supported components. These common changes can introduce new defects and cause previously fixed defects to reappear. This handbook is concerned with regression testing, a software testing technique that focuses on ensuring that modifications to proven software-based syste...

2008-02-28T23:59:59.000Z

297

Digital Radiographic Image Storage and Retrieval  

Science Conference Proceedings (OSTI)

Fabrication and construction radiographs of nuclear plant components contain information valuable for clarifying inservice inspection results and assessing component remaining life. Preservation of radiographic information has become an issue in light of observed instances of degraded radiographs in nuclear plant collections. This report summarizes results to date of a project to provide guidance for evaluating a radiographic film collection and progress on establishing film digitization criteria as an a...

1994-01-01T23:59:59.000Z

298

THE EFFECT OF ELEVATED [CO2] AND ELEVATED TEMPERATURE ON TREE GROWTH AND PHYSIOLOGY  

E-Print Network (OSTI)

407 459 549 577 582 Manufacturer Haier Frigidaire Frigidaire Frigidaire Frigidaire Frigidaire Whirlpool Frigidaire Whirlpool Frigidaire Brand Name Haier Frigidaire Frigidaire Crosley Frigidaire Frigidaire Amana Frigidaire Amana Frigidaire Model Number ESRN046BB FFPT10F3MW FFHT1513LW CRT185HLW/B FFTH

Teskey, Robert O.

299

Image display device in digital TV  

DOE Patents (OSTI)

Disclosed is an image display device in a digital TV that is capable of carrying out the conversion into various kinds of resolution by using single bit map data in the digital TV. The image display device includes: a data processing part for executing bit map conversion, compression, restoration and format-conversion for text data; a memory for storing the bit map data obtained according to the bit map conversion and compression in the data processing part and image data inputted from an arbitrary receiving part, the receiving part receiving one of digital image data and analog image data; an image outputting part for reading the image data from the memory; and a display processing part for mixing the image data read from the image outputting part and the bit map data converted in format from the a data processing part. Therefore, the image display device according to the present invention can convert text data in such a manner as to correspond with various resolution, carry out the compression for bit map data, thereby reducing the memory space, and support text data of an HTML format, thereby providing the image with the text data of various shapes.

Choi, Seung Jong (Seoul, KR)

2006-07-18T23:59:59.000Z

300

Digital instability of a confined elastic meniscus  

E-Print Network (OSTI)

Thin soft elastic layers serving as joints between relatively rigid bodies may function as sealants, thermal, electrical, or mechanical insulators, bearings, or adhesives. When such a joint is stressed, even though perfect adhesion is maintained, the exposed free meniscus in the thin elastic layer becomes unstable, leading to the formation of spatially periodic digits of air that invade the elastic layer, reminiscent of viscous fingering in a thin fluid layer. How- ever, the elastic instability is reversible and rate-independent, dis- appearing when the joint is unstressed. We use theory, experiments, and numerical simulations to show that the transition to the digital state is sudden (first-order), the wavelength and amplitude of the fingers are proportional to the thickness of the elastic layer, and the required separation to trigger the instability is inversely proportional to the in-plane dimension of the layer. Our study reveals the energetic origin of this instability and has implications for the strength of polymeric adhesives; it also suggests a method for patterning thin films reversibly with any arrangement of localized fingers in a digital elastic memory, which we confirm experimentally.

John S. Biggins; Baudouin Saintyves; Zhiyan Wei; Elisabeth Bouchaud; L. Mahadevan

2013-08-13T23:59:59.000Z

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


301

Portable Digital Radiography and Computed Tomography Manual  

SciTech Connect

This user manual describes the function and use of the portable digital radiography and computed tomography (DRCT) scanner. The manual gives a general overview of x-ray imaging systems along with a description of the DRCT system. An inventory of the all the system components, organized by shipping container, is also included. In addition, detailed, step-by-step procedures are provided for all of the exercises necessary for a novice user to successfully collect digital radiographs and tomographic images of an object, including instructions on system assembly and detector calibration and system alignment. There is also a short section covering the limited system care and maintenance needs. Descriptions of the included software packages, the DRCT Digital Imager used for system operation, and the DRCT Image Processing Interface used for image viewing and tomographic data reconstruction are given in the appendixes. The appendixes also include a cheat sheet for more experienced users, a listing of known system problems and how to mitigate them, and an inventory check-off sheet suitable for copying and including with the machine for shipment purposes.

Not Available

2007-11-01T23:59:59.000Z

302

Moisture Retention Curves of Topopah Spring Tuff at Elevated Temperatures  

SciTech Connect

Knowledge of unsaturated flow and transport in porous media is critical for understanding the movement of water and solute through the unsaturated zone. The suction potential of rock determines the imbibition of water and, therefore, the moisture retention in the matrix. That, in turn, affects the relative importance of matrix flow and fracture flow, and their interaction, because greater suction potential moves more water from fractures into the matrix and therefore retards fracture flow. The moisture content as a function of the suction potential is called a moisture retention curve or a characteristic curve. Moisture-retention data are important input for numerical models of water movement in unsaturated porous media. Also important are the effect of sample history on the moisture-retention curves and whether there is significant hysteresis between wetting and drying measurements. The Yucca Mountain Site Characterization Project (YMP) of the U.S. Department of Energy is studying the suitability of the tuffaceous rock at Yucca Mountain, Nevada, for a potential high-level nuclear waste repository. The potential repository horizon will be in the unsaturated zone of the Topopah Spring member (densely welded) of the Paintbrush Tuff unit at Yucca Mountain. This unit is highly fractured. Therefore, transport of water within the near field of the nuclear waste package in the repository is strongly influenced by the suction potential of the repository host rocks at elevated temperatures. In a high-level nuclear waste repository, the rock mass around the waste packages will become dry because of the thermal load of the waste but will then re-wet during the cool-down period as the thermal output of the waste packages declines. Much of this process will occur at temperatures above ambient temperature. The goal of our work is to determine the importance of temperature and the wetting-drying hysteresis on the measured moisture retention curves of the densely welded tuff. For Topopah Spring tuff the suction potential is assumed to be primary due to the matric potential.

Lin, W.; Roberts, J.; Carlberg, E.; Ruddle, D.; Pletcher, R.

2001-11-30T23:59:59.000Z

303

Accelerating explicit state model checking on an FPGA: PHAST.  

E-Print Network (OSTI)

??Verification has become an increasingly important part of the hardware design process. One technique used to verify digital circuits is explicit state model checking. PHAST,… (more)

Tie, Mary Ellen

2012-01-01T23:59:59.000Z

304

A hydrologic information system for water availability modeling.  

E-Print Network (OSTI)

??Texas water availability modeling has undergone a transition from paper-based documents to digital databases and GIS maps. This results in many discrete components: a water… (more)

Siler, Clark D., 1978-

2011-01-01T23:59:59.000Z

305

A particle swarm optimization algorithm for optimal car-call allocation in elevator group control systems  

Science Conference Proceedings (OSTI)

High-rise buildings require the installation of complex elevator group control systems (EGCSs). In vertical transportation, when a passenger makes a hall call by pressing a landing call button installed at the floor and located near the cars of the elevator ... Keywords: Elevator, Elevator group control system, Lift, Particle swarm optimization, Vertical transportation

Berna Bolat; O?Uz Altun; Pablo CortéS

2013-05-01T23:59:59.000Z

306

Digitizing Legacy STI | Scientific and Technical Information Program  

Office of Scientific and Technical Information (OSTI)

Digitizing Legacy STI Digitizing Legacy STI Print page Print page Email page Email page As electronic access to information becomes the norm, many sites are engaged in digitizing their legacy documents (those produced in print prior to 2001). Making these files available through the OSTI databases will help realize the full potential of the Department's scientific and technical information. OSTI will work together with sites across the DOE Complex to provide access to digitized full-text documents in announcement notices in the Energy Link (E-Link) system that do not contain digitized full-text documents. Finding Digitized STI at OSTI DOE and major DOE contractor sites with E-Link access can utilize the Full-text Change report accessible through the Reports section of E-Link. Sites can search by date range for all full-text items that have

307

Renewable Energy & Energy Efficiency Partnership (REEEP) Digital Library |  

Open Energy Info (EERE)

Renewable Energy & Energy Efficiency Partnership (REEEP) Digital Library Renewable Energy & Energy Efficiency Partnership (REEEP) Digital Library Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Renewable Energy and Energy Efficiency Partnership (REEEP) Digital Library Agency/Company /Organization: Renewable Energy and Energy Efficiency Partnership Sector: Energy Focus Area: Energy Efficiency Resource Type: Training materials Website: toolkits.reeep.org/ References: Renewable Energy & Energy Efficiency Partnership (REEEP) Digital Library[1] Logo: Renewable Energy and Energy Efficiency Partnership (REEEP) Digital Library The REEEP digital library offers an array of information in the field of Renewable Energy and Energy Efficiency. These range from policy papers and case studies to presentations that are produced by REEEP funded projects

308

Requirements Engineering for Digital Upgrades: Specification, Analysis, and Tracking  

Science Conference Proceedings (OSTI)

As nuclear power plants upgrade their instrumentation and control (I&C) systems with digital equipment to continue meeting safety and reliability requirements while controlling operating costs, the transition to the new technology has brought new challenges in properly specifying and confirming the correct performance of digital systems and devices. This guideline describes an approach that utilities can use to refine and improve their processes for developing and verifying requirements for digital upgra...

1997-12-09T23:59:59.000Z

309

Handbook for Evaluating Critical Digital Equipment and Systems  

Science Conference Proceedings (OSTI)

Power plants are increasingly upgrading their instrumentation and control (IC) systems, replacing aging and obsolete analog equipment with software-based digital systems. For applications that are critical to safety or plant operability, utilities need to have high confidence that these new digital systems are sufficiently dependable that they will not degrade safety or plant reliability. This handbook suggests and describes in detail a critical digital review (CDR) technique that examines the design of ...

2005-11-28T23:59:59.000Z

310

A digital control algorithm for diesel engine governing  

SciTech Connect

The performance of a microprocessor based precision engine speed control system was investigated. A sample rate selection criteria is presented along with a procedure to implement a high performance digital PID control algorithm. The algorithm requires a digital speed sensor of 12 to 14 bits to minimize excessive fuel rack motion at a steady state due to digital quantization effects. Computer simulation and experimental test results of the algorithm are presented for an 1800 RPM, 125 Kilowatt engine generator set.

Garvey, P.C.

1985-01-01T23:59:59.000Z

311

Sloan Digital Sky Survey Photometric Calibration Revisited  

SciTech Connect

The Sloan Digital Sky Survey calibration is revisited to obtain the most accurate photometric calibration. A small but significant error is found in the flat-fielding of the Photometric telescope used for calibration. Two SDSS star catalogs are compared and the average difference in magnitude as a function of right ascension and declination exhibits small systematic errors in relative calibration. The photometric transformation from the SDSS Photometric Telescope to the 2.5 m telescope is recomputed and compared to synthetic magnitudes computed from measured filter bandpasses.

Marriner, John; /Fermilab

2012-06-29T23:59:59.000Z

312

Corrosion resistant coatings suitable for elevated temperature application  

DOE Patents (OSTI)

The present invention relates to corrosion resistance coatings suitable for elevated temperature applications, which employ compositions of iron (Fe), chromium (Cr), nickel (Ni) and/or aluminum (Al). The compositions may be configured to regulate the diffusion of metals between a coating and a substrate, which may then influence coating performance, via the formation of an inter-diffusion barrier layer. The inter-diffusion barrier layer may comprise a face-centered cubic phase.

Chan, Kwai S. (San Antonio, TX); Cheruvu, Narayana Sastry (San Antonio, TX); Liang, Wuwei (Austin, TX)

2012-07-31T23:59:59.000Z

313

Elevated Hydrogen Management for Three Mile Island Unit 1  

Science Conference Proceedings (OSTI)

The Chemistry, Fuel Reliability and Material Reliability Programs at the Electric Power Research Institute (EPRI) have developed a comprehensive Elevated Reactor Coolant System (RCS) Hydrogen Program that is focused on qualification of plant operation with dissolved hydrogen concentration in the RCS greater than 50 standard cubic centimeters per kilogram (scc/kg) and up to 60 scc/kg to mitigate primary water stress corrosion cracking (PWSCC) in nickel-based alloys. Currently, the industry-wide RCS upper ...

2010-12-22T23:59:59.000Z

314

Space, place, and database : layers of digital cartography  

E-Print Network (OSTI)

This paper addresses the changes in cartography since digitization and widespread popular dissemination. Cybercartography, an emergent system of maps, mapmaking tools, and mapmakers, forces a rethinking of spatial ...

Finkelberg, Amanda (Amanda Suzanne)

2007-01-01T23:59:59.000Z

315

Digital Offshore Cadastre (DOC) - Pacific83 - Baseline Points...  

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

Points Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean Data Digital Offshore Cadastre (DOC) -...

316

Digital Offshore Cadastre (DOC) - Pacific83 - Ecological Preserve...  

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

Ecological Preserve Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean Data Digital Offshore Cadastre...

317

Digital Offshore Cadastre (DOC) ? Pacific83 ? OCS Blocks |...  

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

OCS Blocks Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean Data Digital Offshore Cadastre (DOC) ...

318

Digital Offshore Cadastre (DOC) ? Pacific83 ? Planning Area...  

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

Planning Area Outlines Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean Data Digital Offshore Cadastre...

319

Digital Offshore Cadastre (DOC) - Pacific83 Â? Continental...  

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

Continental Shelf Boundaries Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean Data Digital...

320

Digital Offshore Cadastre (DOC) - Pacific83 - Baseline Tangent...  

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

Tangent Lines Ocean Data Tools Technical Guide Map Gallery Regional Planning Feedback Ocean You are here Data.gov Communities Ocean Data Digital Offshore Cadastre (DOC) -...

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


321

Materials for Nuclear Power: Digital Resource Center - TMS  

Science Conference Proceedings (OSTI)

Spacer 62115 users are registered to the Materials for Nuclear Power: Digital Resource Center forum. Spacer There are currently 0 users logged in. Spacer ...

322

U-034: Fraudulent Digital Certificates Could Allow Spoofing ...  

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

Addthis PROBLEM: Fraudulent Digital Certificates Could Allow Spoofing. PLATFORM: Windows XP Service Pack 3 Windows XP Professional x64 Edition Service Pack 2 Windows Server...

323

Digital TV vs internet: similarities suggest future opportunities for SMEs to advertise on digital TV  

Science Conference Proceedings (OSTI)

Television has been a medium commonly used by enterprises to promote their values, products, services and offers. TV advertising can be expensive, affordable only to enterprises with a substantial budget for promotion. That leaves a great number of Small ... Keywords: advertising, connected tv, digital tv, small business, sme

Rafael Gonçalez Carneiro

2011-06-01T23:59:59.000Z

324

Modeling Incinerator Flue Train Performance with a Digital Computer  

E-Print Network (OSTI)

as a matrix of pressure/volume points, along with fan speed and horsepower requirements at the design point of incinerator performance under a wide range of conditions, Furnace and flue train design data are fed that requirements can be met under all conditions at a reasonable cost. The municipal design picture is complicated

Columbia University

325

Automatic Digital Surface Model (DSM) Generation from Linear Array Images  

E-Print Network (OSTI)

the ability to acquire more than 2 views of the terrain surface during a single flight line or orbit by far not live up to the standards set by manual measurements. Therefore, efforts have to be made and automatic quality control, and works with a coarse-to-fine hierarchical matching strategy. The most

Giger, Christine

326

Thermal Modeling of Direct Digital Melt Deposition Processes  

Science Conference Proceedings (OSTI)

The Research on Controlling the Pre-Bending Deformation before Straightening and the Residual Stresses after Straightening of 100-Meter Rail.

327

Models  

E-Print Network (OSTI)

• A very typical statistical/econometric model assumes something like yt ? i.i.d. f (y, x, ?) (1) where f (·) is a parametric family known up to parameters ?. • Parameter estimation: maximum likelihood ˆ?n = arg max ? ln f (Yt, Xt, ?) (2) t • What if the basic model assumptions of (1) are violated? The parametric family may not contain the true model f0(x, y) that generated the data; or the data may not be i.i.d.; etc. Misspecified

Stas Kolenikov; U Of Missouri; U Of Missouri

2007-01-01T23:59:59.000Z

328

Analog-to-digital converter with data processing  

DOE Patents (OSTI)

This device incorporates an analog-digital converter including a data processing section which can be used to perform data processing on digitized data as is generated, off-line from the system processor. It consists of a 12 bit analog to digital converter for generating discrete digital data representative of an input analog signal, a data bus coupled to receive the digital data as is generated, a 512 Kbyte memory RAM to store the digitized data, and a system bus coupled to the data processing element for outputting the result of the performed operation. This is the first device with analog to digital converters and memory. It is the first module to be designed to the VXIbus format. This device is the first to incorporate an averaging circuit in the design. It has a sealed analog module (outputs the sum and difference of the log signals for both the X and the Y axis of the beam position module), memory channels, four averaging channels the programmable trigger and digitizer clock logic, and a VXIbus interface. This device is useful in the fields of data acquisition, data processing, communication systems, instrumentation and electronics.

Jones, A.

1993-01-01T23:59:59.000Z

329

Usage derived recommendations for a video digital library  

Science Conference Proceedings (OSTI)

We describe a minimalist methodology to develop usage-based recommender systems for multimedia digital libraries. A prototype recommender system based on this strategy was implemented for the Open Video Project, a digital library of videos that are freely ... Keywords: Open Video Project, Recommender systems, Usage analysis, Video

Johan Bollen; Michael L. Nelson; Gary Geisler; Raquel Araujo

2007-08-01T23:59:59.000Z

330

Make Money with your Digital Photography, 1st edition  

Science Conference Proceedings (OSTI)

Learn to find the opportunities and make money with your digital cameraMost digital photo buffs have thought about turning their hobby into a side business, but building a successful business takes more than passion and photographic skill. Erin Manning ...

Erin Manning

2011-05-01T23:59:59.000Z

331

Global Trends in Digital Governance: A Longitudinal Study  

Science Conference Proceedings (OSTI)

This paper highlights the research findings of a digital governance survey conducted in the fall of 2009. The study replicates previous surveys of large municipalities worldwide in 2007, 2005, and 2003. This longitudinal assessment, focused on the assessment ... Keywords: Citizen Participation, Digital Democracy, E-Governance, E-Government, Privacy, Services, Usability

Marc Holzer; Aroon Manoharan; Marc Fudge

2011-04-01T23:59:59.000Z

332

Supporting sociable literacy in the international children's digital library  

Science Conference Proceedings (OSTI)

As each generation of children grows up in a world shaped by the affordances available to them in both physical and digital environments, their expectations of tools to support changing literacy practices make new demands on technologists and designers. ... Keywords: children, contextual inquiry, cooperative inquiry, digital libraries, participatory design, sociable literacy

Nancy Kaplan; Yoram Chisik; Kendra Knudtzon; Rahul Kulkarni; Stuart Moulthrop; Kathryn Summers; Holly Weeks

2004-06-01T23:59:59.000Z

333

Cybercrime: Legal Standards Governing the Collection of Digital Evidence  

Science Conference Proceedings (OSTI)

The prosecution of cybercriminals depends upon the collection of digital evidence. In the United States, a complicated system of constitutional and statutory provisions govern what law enforcement officers can, and cannot, do in collecting digital evidence, ... Keywords: ECPA, Fourth Amendment, Patriot Act, Title III, wiretapping

Joseph J. Schwerha, IV

2004-06-01T23:59:59.000Z

334

A Measurement Framework for Evaluating Emulators for Digital Preservation  

Science Conference Proceedings (OSTI)

Accessible emulation is often the method of choice for maintaining digital objects, specifically complex ones such as applications, business processes, or electronic art. However, validating the emulator’s ability to faithfully reproduce the original ... Keywords: Emulation, automated testing, characteristics of rendered content, digital preservation, preserving interactive content, system properties

Mark Guttenbrunner; Andreas Rauber

2012-05-01T23:59:59.000Z

335

Robust Numerical Integration Using Wave-Digital Concepts  

Science Conference Proceedings (OSTI)

Numerical integration of linear and nonlinear ordinary and partial differential equations describing physically realistic systems can be achieved by means of principles derived from those originally developed in the context of wave digital filters, thus ... Keywords: Robust numerical integration, linear and nonlinear ordinary and partial differential equations, multidimensional causal and passive systems, wave-digital approach

Alfred Fettweis

2006-01-01T23:59:59.000Z

336

MPEG-21 digital items in research and practice  

Science Conference Proceedings (OSTI)

The aim of the MPEG-21 standard, the so-called Multimedia Framework, is to enable transparent and augmented use of multimedia resources across a wide range of networks, devices, user preferences, and communities, notably for trading (of bits). As such, ... Keywords: DANAE, ENTHRONE, MPEG-21, P2P-Next, UPnP, application, digital item, digital library, usage

Christian Timmerer; Hermann Hellwagner

2010-04-01T23:59:59.000Z

337

Digital cultural collections in an age of reuse and remixes  

Science Conference Proceedings (OSTI)

This paper reports the results of a survey of U.S. cultural institution (CI) professionals about whether CI should seek to control access to and use of digital cultural collections. It describes motivations that encourage institutions to control access ... Keywords: archives, copyright, digital collections, licensing, museums, open access, privacy

Kristin R. Eschenfelder; Michelle Caswell

2010-10-01T23:59:59.000Z

338

Simulation of implosion and transportation of ore in digital mine  

Science Conference Proceedings (OSTI)

Digital mining technology and software development are essential for informatization in China coal industry. We adopt .net3.0 platform and OpenGL graphics library to develop a system to simulate the process of ore's implosion and the process of ore's ... Keywords: digital mine, particle system, simulation of implosion, transportation of ore

Xixi Huang; Dongyong Yan; Fuli Wu; Nan Xiang; Mingmin Zhang

2011-01-01T23:59:59.000Z

339

Query parameters for harvesting digital video and associated contextual information  

Science Conference Proceedings (OSTI)

Video is increasingly important to digital libraries and archives as both primary content and as context for the primary objects in collections. Services like YouTube not only offer large numbers of videos but also usage data such as comments and ratings ... Keywords: digital curation, harvesting, video mining

Gary Marchionini; Chirag Shah; Christopher A. Lee; Robert Capra

2009-06-01T23:59:59.000Z

340

A collusion attack optimization strategy for digital fingerprinting  

Science Conference Proceedings (OSTI)

Collusion attack is a cost-efficient attack for digital fingerprinting. In this article, we propose a novel collusion attack strategy, Iterative Optimization Collusion Attack (IOCA), which is based upon the gradient attack and the principle of ... Keywords: Multimedia security, collusion attack, digital fingerprinting, optimization

Hui Feng; Hefei Ling; Fuhao Zou; Weiqi Yan; Zhengding Lu

2012-09-01T23:59:59.000Z

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


341

Browse and Search Patterns in a Digital Image Database  

Science Conference Proceedings (OSTI)

A prototype image retrieval system with browse and search capabilities was developed to investigate patterns of searching a collection of digital visual images, as well as factors, such as image size, resolution, and download speed, which affect browsing. The ... Keywords: browsing, digital images, image retrieval, user studies

C. Olivia Frost; Bradley Taylor; Anna Noakes; Stephen Markel; Deborah Torres; Karen M. Drabenstott

2000-01-01T23:59:59.000Z

342

Network Electricity Use Associated with Wireless Personal Digital Assistants  

E-Print Network (OSTI)

Network Electricity Use Associated with Wireless Personal Digital Assistants Jonathan Koomey1 the widely cited claim that the network electricity use associated with a wireless personal digital assistant PDA is equal to the electricity consumed by a refrigerator. It compiles estimates of the data flows

Kammen, Daniel M.

343

Digital plasma control system and Alcasim simulation code for Alcator C-Mod  

E-Print Network (OSTI)

Abstract The Alcator C-Mod control system was upgraded to digital architecture DPCS (Digital Plasma Control System). The main features of the digital system are the high flexibility, robustness and maintainability. The ...

Ferrara, Marco, Ph. D. Massachusetts Institute of Technology

2005-01-01T23:59:59.000Z

344

Techniques for high-performance digital frequency synthesis and phase control  

E-Print Network (OSTI)

This thesis presents a 3.6-GHz, 500-kHz bandwidth digital [delta][sigma] frequency synthesizer architecture that leverages a recently invented noise-shaping time-to-digital converter (TDC) and an all-digital quantization ...

Hsu, Chun-Ming, Ph. D. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

345

A Security Study of Digital TV Distribution Systems  

E-Print Network (OSTI)

1 This Thesis corresponds to 20 weeks of full-time work for the authors. For digital TV distribution, the current predominant business model is vertical. That is, TV operators and end users are locked to some certain proprietary conditional access (CA) systems, CA vendors control set-top-box manufacturers with their proprietary technology, and subscribers can achieve new services at the cost of changing STBs. Thus the horizontal business model is required to enable the open and competing market for any TV operator, and the attractive services for subscribers. The SSNF 2 is making efforts on providing households high quality TV services over the urban networks, where households can freely choose the competing offerings via an open platform. The traditional battleground of TV operators is in broadcast networks; however, the more mature IP technology becomes, TV operators will increase interests in providing services in IP networks. Furthermore, TV operators are aware of the possible additional value from the mobile distribution channel due to the evolution of cellular networks from “pure voice telephony networks to universal data networks ” [67].

Nariman Molavi; Xu Zhao; Copyright Nariman Molavi; Xu Zhao

2005-01-01T23:59:59.000Z

346

ADVISORY ALERT: Dekker, Ltd. Digital Signature - PARS II Reporting  

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

ADVISORY ALERT: Dekker, Ltd. Digital Signature - PARS II Reporting ADVISORY ALERT: Dekker, Ltd. Digital Signature - PARS II Reporting As you know, to run reports in the PARS II, users must install an active X control to their workstations. The FIRST TIME a user attempts to run a report after installing the Active X control, a Security Warning will appear stating: That warning appears because, although the digital signature is valid, the digital signature is from a publisher (in this case Dekker, Ltd.) whom you have not yet chosen to trust. The following steps instruct you how to clear the security warning so that you may continue working with PARS II reports. Please note: Once you complete the process of accepting the Dekker, LTd. digital signature, this warning will not re-appear. This process must be done ONCE to "inform" your PC that Dekker, LTd. is an

347

Elevated atmospheric carbon dioxide in agroecosystems affects groundwater quality  

Science Conference Proceedings (OSTI)

Increasing atmospheric carbon dioxide (CO{sub 2}) concentration has led to concerns about global changes to the environment. One area of global change that has not been addressed is the effect of elevated atmospheric CO{sub 2} on groundwater quality below agroecosystems. Elevated CO{sub 2} concentration alterations of plant growth and C/N ratios may modify C and N cycling in soil and affect nitrate (NO{sub 3}{sup {minus}}) leaching to groundwater. This study was conducted to examine the effects of a legume (soybean [Glycine max (L.) Merr.]) and a nonlegume (grain sorghum [Sorghum bicolor (L.) Moench]) CO{sub 2}-enriched agroecosystems on NO{sub 3}{sup {minus}} movement below the root zone in a Blanton loamy sand (loamy siliceous, thermic, Grossarenic Paleudults). The study was a split-plot design replicated three times with plant species (soybean and grain sorghum) as the main plots and CO{sub 2} concentration ({approximately}360 and {approximately}720 {mu}L L{sup {minus}1} CO{sub 2}) as subplots using open-top field chambers. Fertilizer application was made with {sup 15}N-depleted NH{sub 4}NO{sub 3} to act as a fertilizer tracer. Soil solution samples were collected weekly at 90-cm depth for a 2-yr period and monitored for NO{sub 3}{sup {minus}}-N concentrations. Isotope analysis of soil solution indicated that the decomposition of organic matter was the primary source of No{sub 3}{sup {minus}}-N in soil solution below the root zone through most of the monitoring period. Significant differences were observed for NO{sub 3}{sup {minus}}-N concentrations between soybean and grain sorghum, with soybean having the higher NO{sub 3}{sup {minus}}-N concentration. Elevated CO{sub 2} increased total dry weight, total N content, and C/N ratio of residue returned to soil in both years. Elevated CO{sub 2} significantly decreased NO{sub 3}{sup {minus}}-N concentrations below the root zone in both soybean and grain sorghum. 37 refs., 2 figs., 2 tabs.

Torbert, H.A. [Blackland, Soil and Water Research Lab., Temple, TX (United States); Prior, S.A.; Rogers, H.H. [National Soil Dynamics Lab., Auburn, AL (United States); Schlesinger, W.H. [Duke Univ., Durham, NC (United States); Mullins, G.L.; Runion, G.B. [Auburn Univ., AL (United States)

1996-07-01T23:59:59.000Z

348

Digital Bond Fact Sheet.cdr  

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

cost-shared effort between industry and cost-shared effort between industry and Cyber Security Audit and Attack Detection Toolkit Cyber Security Audit and Attack Detection Toolkit Bandolier Audit Files for optimizing security configurations and the Portaledge event detection capability for energy control systems Bandolier Audit Files for optimizing security configurations and the Portaledge event detection capability for energy control systems Cyber Security for Energy Delivery Systems Electricity Delivery & Energy Reliability Project Lead: Digital Bond Partners: OSIsoft Tenable Network Security PacifiCorp Tennessee Valley Authority Other Participating Vendors: ABB AREVA Emerson Matrikon SNC Telvent Bandolier and Portaledge The Concept Bandolier-The Approach By building configuration audit and attack detection capabilities into tools already

349

Digital Gas Inc | Open Energy Information  

Open Energy Info (EERE)

Inc Inc Jump to: navigation, search Name Digital Gas Inc Place Dallas, Texas Sector Solar Product Company with a number of subsidiaries involved in mining, solar power, waste burning, energy saving, farming and electronics. Coordinates 32.778155°, -96.795404° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":32.778155,"lon":-96.795404,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

350

Class 1E digital systems studies  

SciTech Connect

This document is furnished as part of the effort to develop NRC Class 1E Digital Computer Systems Guidelines which is Task 8 of USAF Rome Laboratories Contract F30602-89-D-0100. The report addresses four major topics, namely, computer programming languages, software design and development, software testing and fault tolerance and fault avoidance. The topics are intended as stepping stones leading to a Draft Regulatory Guide document. As part of this task a small scale survey of software fault avoidance and fault tolerance practices was conducted among vendors of nuclear safety related systems and among agencies that develop software for other applications demanding very high reliability. The findings of the present report are in part based on the survey and in part on review of software literature relating to nuclear and other critical installations, as well as on the authors` experience in these areas.

Hecht, H.; Tai, A.T.; Tso, K.S. [SoHaR, Inc., Beverly Hills, CA (United States)

1993-10-01T23:59:59.000Z

351

The application of taylor weighting, digital phase shifters, and digital attenuators to phased-array antennas.  

SciTech Connect

Application of Taylor weighting (taper) to an antenna aperture can achieve low peak sidelobes, but combining the Taylor weighting with quantized attenuators and phase shifters at each radiating element will impact the performance of a phased-array antenna. An examination of array performance is undertaken from the simple point of view of the characteristics of the array factor. Design rules and guidelines for determining the Taylor-weighting parameters, the number of bits required for the digital phase shifter, and the dynamic range and number of bits required for the digital attenuator are developed. For a radar application, when each element is fed directly from a transmit/receive module, the total power radiated by the array will be reduced as a result of the taper. Consequently, the issue of whether to apply the taper on both transmit and receive configurations, or only on the receive configuration is examined with respect to two-way sidelobe performance.

Brock, Billy C.

2008-03-01T23:59:59.000Z

352

Storage and retrieval of large digital images  

DOE Patents (OSTI)

Image compression and viewing are implemented with (1) a method for performing DWT-based compression on a large digital image with a computer system possessing a two-level system of memory and (2) a method for selectively viewing areas of the image from its compressed representation at multiple resolutions and, if desired, in a client-server environment. The compression of a large digital image I(x,y) is accomplished by first defining a plurality of discrete tile image data subsets T{sub ij}(x,y) that, upon superposition, form the complete set of image data I(x,y). A seamless wavelet-based compression process is effected on I(x,y) that is comprised of successively inputting the tiles T{sub ij}(x,y) in a selected sequence to a DWT routine, and storing the resulting DWT coefficients in a first primary memory. These coefficients are periodically compressed and transferred to a secondary memory to maintain sufficient memory in the primary memory for data processing. The sequence of DWT operations on the tiles T{sub ij}(x,y) effectively calculates a seamless DWT of I(x,y). Data retrieval consists of specifying a resolution and a region of I(x,y) for display. The subset of stored DWT coefficients corresponding to each requested scene is determined and then decompressed for input to an inverse DWT, the output of which forms the image display. The repeated process whereby image views are specified may take the form an interaction with a computer pointing device on an image display from a previous retrieval. 6 figs.

Bradley, J.N.

1998-01-20T23:59:59.000Z

353

Synchronous Squamous Cell Carcinoma in Multiple Digits  

E-Print Network (OSTI)

Cancers of the perionychium are relatively rare occurrences and are often related to chronic inflammation associated with trauma, infection, exposure to ultraviolet radiation, or other carcinogens. Squamous cell carcinoma is the most common tumor reported of the nail bed. Synchronous squamous cell carcinomas of the perionychium have been rarely reported. We present a case of a 46-year-old woman with synchronous squamous cell carcinomas involving both hands and multiple digits. Treatment modalities include chemotherapeutics, Mohs surgery, and amputation. Early diagnosis of squamous cell carcinoma of the nail bed provides the greatest chance to preserve maximal function of the hand. Onychomycosis may be the presenting symptom of a patient with squamous cell carcinoma and may also be a predisposing factor in patients with occupational risk factors. Suspicion of this disease process can help the clinician establish the diagnosis via biopsy and provide optimal care for these patients. Cancers of the perionychium are relatively rare occurrences and are often related to chronic inflammation associated with trauma, infection, exposure to ultraviolet radiation, or other carcinogens. Squamous cell carcinoma is the most common tumor reported of the nail bed. Synchronous squamous cell carcinomas of the perionychium have been rarely reported. We present a case of a 46-year-old woman with synchronous squamous cell carcinomas involving both hands and multiple digits. CASE REPORT A 46-year-old white female was referred from the dermatology clinic with a biopsy-proven squamous cell carcinoma of the left ring finger perionychium. Physical examination demonstrated erythematous scaly lesions with the absence of a nail plate at the left thumb, index Authors have no financial disclaimers or conflicts to disclose. 70 ABNER ET AT finger, and ring finger as well as the right long finger, without associated lymphadenopathy (Fig 1). She described chronic onychomycosis of the nails attributed to her job as a dishwasher.

Morton L. Kasdan; Bradon J. Wilhelmi; Mda A B

2011-01-01T23:59:59.000Z

354

The experience and image of American elevated railways : rapid transit infrastructure in the urban consciousness  

E-Print Network (OSTI)

At the turn of the twentieth century, elevated railways were built out of a practical need to literally "elevate" traffic above the street. In most cases, these lines served two distinct purposes. They served existing ...

Hansen, Gordon Benedict

2009-01-01T23:59:59.000Z

355

U-092: Sudo Format String Bug Lets Local Users Gain Elevated...  

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

2: Sudo Format String Bug Lets Local Users Gain Elevated Privileges U-092: Sudo Format String Bug Lets Local Users Gain Elevated Privileges January 31, 2012 - 5:45am Addthis...

356

Determining Weather Radar Antenna Pointing Using Signals Detected from the Sun at Low Antenna Elevations  

Science Conference Proceedings (OSTI)

A method to determine the elevation and azimuth biases of the radar antenna using solar signals observed by a scanning radar is presented. Data recorded at low elevation angles where the atmospheric refraction has a significant effect on the ...

Asko Huuskonen; Iwan Holleman

2007-03-01T23:59:59.000Z

357

A digital optical phase-locked loop for diode lasers based on field programmable gate array  

Science Conference Proceedings (OSTI)

We have designed and implemented a highly digital optical phase-locked loop (OPLL) for diode lasers in atom interferometry. The three parts of controlling circuit in this OPLL, including phase and frequency detector (PFD), loop filter and proportional integral derivative (PID) controller, are implemented in a single field programmable gate array chip. A structure type compatible with the model MAX9382/MCH12140 is chosen for PFD and pipeline and parallelism technology have been adapted in PID controller. Especially, high speed clock and twisted ring counter have been integrated in the most crucial part, the loop filter. This OPLL has the narrow beat note line width below 1 Hz, residual mean-square phase error of 0.14 rad{sup 2} and transition time of 100 {mu}s under 10 MHz frequency step. A main innovation of this design is the completely digitalization of the whole controlling circuit in OPLL for diode lasers.

Xu Zhouxiang; Zhang Xian; Huang Kaikai; Lu Xuanhui [Physics Department, Zhejiang University, Hangzhou, 310027 (China)

2012-09-15T23:59:59.000Z

358

The Digital-Surrogate Seal of Approval: a Consumer-oriented Standard  

E-Print Network (OSTI)

A Resource List for Standards Related to Digital Imaging ofa Consumer-oriented Standard James A. Jacobs University ofJustification of a New Standard Digitization of existing

Jacobs, James A; Jacobs, James R

2013-01-01T23:59:59.000Z

359

An introduction to Digital Addressable Lighting Interface (DALI) systems & study of a DALI day lighting application.  

E-Print Network (OSTI)

??The DALI (Digital Addressable Lighting Interface) protocol has set forth the requirements for a digital fluorescent ballast that out performs its predecessors with respect to… (more)

Meyer, Lisa

2007-01-01T23:59:59.000Z

360

Vendor-neutral case input and window and level managemnet for a digital teaching file system;.  

E-Print Network (OSTI)

??Although digital teaching files are important to radiology education, there is no current satisfactory solutions for export of Digital Imaging and Communications in Medicine (DICOM)… (more)

Kamauu, Aaron Wailana Charles

2006-01-01T23:59:59.000Z

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


361

Irreversible transformations of native celluloses, upon exposure to elevated temperatures  

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

Carbohydrate Polymers 100 (2014) 2- 8 Carbohydrate Polymers 100 (2014) 2- 8 Contents lists available at ScienceDirect Carbohydrate Polymers j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / c a r b p o l Irreversible transformations of native celluloses, upon exposure to elevated temperatures R.S. Atalla a , M.F. Crowley b , M.E. Himmel b , R.H. Atalla a,c,∗ a Cellulose Sciences International, Madison, WI, United States b National Renewable Energy Laboratory, Golden, CO, United States c University of Wisconsin-Madison, Madison, WI, United States a r t i c l e i n f o Article history: Received 29 August 2012 Received in revised form 4 June 2013 Accepted 7 June 2013 Available online 15 June 2013 Keywords: Transformation Irreversible Celluloses Elevated Temperatures Native Accessibility Aggregation a b s t r a c t Current research, basic and applied, assumes that observed recalcitrance of celluloses is an inherent

362

Rangeland Plant response to elevated CO{sub 2}  

SciTech Connect

Plots of a tallgrass prairie ecosystem were exposed to ambient and twice-ambient CO{sub 2} concentrations in open-top chambers and compared to unchambered ambient CO{sub 2} plots during the entire growing season from 1989 through 1993. Dominant species were Andropogon geradii, A. scoparius, and Sorghastrum nutans (C{sub 4}) and Poa pratensis (C{sub 3}). Aboveground biomass and leaf area were estimated by periodic sampling throughout the growing season in 1989 and 1990. In 1991, 1992, and 1993, peak biomass and leaf area were estimated by an early August harvest. Compared to ambient CO{sub 2} levels, elevated CO{sub 2} increased production of C{sub 4} grass species in 1989-1991, but in 1992 and 1993, wet years, there was no difference in C{sub 4} biomass production among treatments. Biomass production of C{sub 3} grass species did not differ among treatments any year. Root ingrowth biomass was greater in 1990 and 1991 on elevated CO{sub 2} plots compared to ambient or chambered-ambient plots. In 1992 and 1993, there was no difference in root ingrowth biomass among treatments.

Owensby, C.E.; Coyne, P.I.; Ham, J.M.; Parton, W.; Rice, C.; Auen, L.M.; Adam, N.

1994-12-31T23:59:59.000Z

363

Virtual cityscapes: recent advances in crowd modeling and traffic simulation  

Science Conference Proceedings (OSTI)

We survey our recent work on interactive modeling, generation, and control of large-scale crowds and traffic for simulating digital cities. These include multi-agent navigation, simulating large crowds with emerging behaviors as well as interactive simulation ... Keywords: continuum traffic, crowd modeling, digital cities, multi-agent simulation

Ming C. Lin; Dinesh Manocha

2010-09-01T23:59:59.000Z

364

Prototype of time digitizing system for BESIII endcap TOF upgrade  

E-Print Network (OSTI)

The prototype of time digitizing system for the upgrade of BESIII endcap TOF (ETOF) is introduced in this paper. The ETOF readout electronics has a formation of distributed architecture that hit signal from multi-gap resistive plate chamber (MRPC) is signaled as LVDS by front-end electronics (FEE) and sent to the back-end time digitizing system via long shield differential twisted pair cables. The ETOF digitizing system consists of 2 VME crates each of which contains modules of time digitizing, clock, trigger and fast control etc. The time digitizing module (TDIG) of this prototype can support up to 72 electrical channels of hit information measurement. The fast control (FCTL) module can operate at barrel or endcap mode. The barrel FCTL fans fast control signals from the trigger system out to endcap FCTLs, merges data from endcaps and transfers to the trigger system. Without modifying the barrel TOF structure, this time digitizing architecture benefits for improving ETOF performance without degrading barrel TOF measuring. Lab experiments show that the time resolution of this digitizing system can be less than 20ps, and the data throughput to DAQ can be about 92Mbps. Beam experiments show that the complete time resolution can be less than 45ps.

Cao Ping; Sun Wei-Jia; Ji Xiao-Lu; Fan Huan-Huan; Wang Si-Yu; Liu Shu-Bin; An Qi

2013-05-30T23:59:59.000Z

365

Modeling  

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

ALE-AMR ALE-AMR code Wangyi Liu, John Bernard, Alex Friedman, Nathan Masters, Aaron Fisher, Velemir Mlaker, Alice Koniges, David Eder June 4, 2011 Abstract In this paper we describe an implementation of a single-fluid inter- face model in the ALE-AMR code to simulate surface tension effects. The model does not require explicit information on the physical state of the two phases. The only change to the existing fluid equations is an additional term in the stress tensor. We show results of applying the model to an expanding Al droplet surrounded by an Al vapor, where additional droplets are created. 1 Introduction The Neutralized Drift Compression Experiment II (NDCX II) is an induction accelerator planned for initial commissioning in 2012. The final design calls for a 3 MeV, Li+ ion beam, delivered in a bunch with characteristic pulse duration of 1 ns, and transverse dimension of order 1 mm. The

366

Complexation of Neptunium(V) with Fluoride at Elevated Temperatures  

SciTech Connect

Complexation of neptunium(V) with fluoride at elevated temperatures was studied by spectrophotometry and microcalorimetry. Two successive complexes, NpO{sub 2}F(aq) and NpO{sub 2}F{sub 2}{sup -}, were identified by spectrophotometry in the temperature range of 10-70 C. Thermodynamic parameters, including the equilibrium constants and enthalpy of complexation between Np(V) and fluoride at 10-70 C were determined. Results show that the complexation of Np(V) with fluoride is endothermic and that the complexation is enhanced by the increase in temperature - a two-fold increase in the stability constants of NpO{sub 2}F(aq) and more than five-fold increase in the stability constants of NpO{sub 2}F{sub 2}{sup -} as the temperature is increased from 10 to 70 C.

Rao, Linfeng; Tian, Guoxin; Xia, Yuanxian; Friese, Judah I.

2008-06-16T23:59:59.000Z

367

Microelectromechanical apparatus for elevating and tilting a platform  

DOE Patents (OSTI)

A microelectromechanical (MEM) apparatus is disclosed which has a platform that can be elevated above a substrate and tilted at an arbitrary angle using a plurality of flexible members which support the platform and control its movement. Each flexible member is further controlled by one or more MEM actuators which act to bend the flexible member. The MEM actuators can be electrostatic comb actuators or vertical zip actuators, or a combination thereof. The MEM apparatus can include a mirror coating to form a programmable mirror for redirecting or switching one or more light beams for use in a projection display. The MEM apparatus with the mirror coating also has applications for switching light beams between optical fibers for use in a local area fiber optic network, or for use in fiber optic telecommunications or data communications systems.

Miller, Samuel Lee (Albuquerque, NM); McWhorter, Paul Jackson (Albuquerque, NM); Rodgers, Murray Steven (Albuquerque, NM); Sniegowski, Jeffry J. (Edgewood, NM); Barnes, Stephen M. (Albuquerque, NM)

2003-04-08T23:59:59.000Z

368

Measuring microfocal spots using digital radiography  

SciTech Connect

Measurement of microfocus spot size can be important for several reasons: (1) Quality assurance during manufacture of microfocus tubes; (2) Tracking performance and stability of microfocus tubes; (3) Determining magnification is especially important for digital radiography where the native spatial resolution of the digital system is not adequate for the application; and (4) Knowledge of unsharpness from the focal spot alone. The European Standard EN 12543-5 is based on a simple geometrical method of calculating focal spot size from unsharpness of high magnification film radiographs. The following equations are used for the focal spot size measurement: By similar triangles the following equations are presupposed: f/a = U/b and M = (a+b)/a. These equations can be combined to yield the well known expression: U = f(M - 1). Solving for f, f = U/(M-1). Therefore, the focal spot size, f, can be calculated by measuring the radiographic unsharpness and magnification of a known object. This is the basis for these tests. The European standard actually uses one-half of the unsharpness (which are then added together) from both sides of the object to avoid additional unsharpness contributions due to edge transmission unsharpness of the round test object (the outside of the object is measured). So the equation becomes f = (1/2 U{sub 1} + 1/2 U{sub 2})/(M-1). In practice 1/2 U is measured from the 50% to the 90% signal points on the transition profile from ''black'' to ''white,'' (positive image) or attenuated to unattenuated portion of the image. The 50% to 90% points are chosen as a best fit to an assumed Gaussian radiation distribution from the focal spot and to avoid edge transmission effects. 1/2 U{sub 1} + 1/2 U{sub 2} corresponds about to the full width at half height of a Gaussian focal spot. A highly absorbing material (Tungsten, Tungsten Alloy, or Platinum) is used for the object. Either wires or a sphere are used as the object to eliminate alignment issues. One possibility is to use the wires in the ASTM E2002 unsharpness gage and take two orthogonal images. The signal levels in the image need to be linear with radiation exposure and so may need conversion if a nonlinear detector is used to acquire the image.

Fry, David A [Los Alamos National Laboratory; Ewert, Uwe [BAM

2009-01-01T23:59:59.000Z

369

General application of rapid 3-D digitizing and tool path generation for complex shapes  

SciTech Connect

A system for automatic tool path generation was developed at Sandia National Laboratories for finish machining operations. The system consists of a commercially available 5-axis milling machine controlled by Sandia developed software. This system was used to remove overspray on cast turbine blades. A laser-based, structured-light sensor, mounted on a tool holder, is used to collect 3D data points around the surface of the turbine blade. Using the digitized model of the blade, a tool path is generated which will drive a 0.375 inch grinding pin around the tip of the blade. A fuzzified digital filter was developed to properly eliminate false sensor readings caused by burrs, holes and overspray. The digital filter was found to successfully generate the correct tool path for a blade with intentionally scanned holes and defects. The fuzzified filter improved the computation efficiency by a factor of 25. For application to general parts, an adaptive scanning algorithm was developed and presented with simulation and experimental results. A right pyramid and an ellipsoid were scanned successfully with the adaptive algorithm in simulation studies. In actual experiments, a nose cone and a turbine blade were successfully scanned. A complex shaped turbine blade was successfully scanned and finished machined using these algorithms.

Kwok, K.S.; Loucks, C.S.; Driessen, B.J.

1997-09-01T23:59:59.000Z

370

Transient digitizer with displacement current samplers  

DOE Patents (OSTI)

A low component count, high speed sample gate, and digitizer architecture using the sample gates is based on use of a signal transmission line, a strobe transmission line and a plurality of sample gates connected to the sample transmission line at a plurality of positions. The sample gates include a strobe pickoff structure near the strobe transmission line which generates a charge displacement current in response to propagation of the strobe signal on the strobe transmission line sufficient to trigger the sample gate. The sample gate comprises a two-diode sampling bridge and is connected to a meandered signal transmission line at one end and to a charge-holding cap at the other. The common cathodes are reverse biased. A voltage step is propagated down the strobe transmission line. As the step propagates past a capacitive pickoff, displacement current i=c(dv/dT), flows into the cathodes, driving the bridge into conduction and thereby charging the charge-holding capacitor to a value related to the signal. A charge amplifier converts the charge on the charge-holding capacitor to an output voltage. The sampler is mounted on a printed circuit board, and the sample transmission line and strobe transmission line comprise coplanar microstrips formed on a surface of the substrate. Also, the strobe pickoff structure may comprise a planar pad adjacent the strobe transmission line on the printed circuit board. 16 figs.

McEwan, T.E.

1996-05-21T23:59:59.000Z

371

Transient digitizer with displacement current samplers  

DOE Patents (OSTI)

A low component count, high speed sample gate, and digitizer architecture using the sample gates is based on use of a signal transmission line, a strobe transmission line and a plurality of sample gates connected to the sample transmission line at a plurality of positions. The sample gates include a strobe pickoff structure near the strobe transmission line which generates a charge displacement current in response to propagation of the strobe signal on the strobe transmission line sufficient to trigger the sample gate. The sample gate comprises a two-diode sampling bridge and is connected to a meandered signal transmission line at one end and to a charge-holding cap at the other. The common cathodes are reverse biased. A voltage step is propagated down the strobe transmission line. As the step propagates past a capacitive pickoff, displacement current i=c(dv/dT), flows into the cathodes, driving the bridge into conduction and thereby charging the charge-holding capacitor to a value related to the signal. A charge amplifier converts the charge on the charge-holding capacitor to an output voltage. The sampler is mounted on a printed circuit board, and the sample transmission line and strobe transmission line comprise coplanar microstrips formed on a surface of the substrate. Also, the strobe pickoff structure may comprise a planar pad adjacent the strobe transmission line on the printed circuit board.

McEwan, Thomas E. (Livermore, CA)

1996-01-01T23:59:59.000Z

372

PRESSURIZER ANALYSIS AND THE PRE DIGITAL PROGRAM  

SciTech Connect

An analysis is given which was programmed for the Philco 2000 (TRANSAC) Computer in order to provide a means for making pressurizer design and performance calculations. The analysis and digital program provide the exibility for studying the effects of various assumptions such as the type of steam compression process (i.e., isentropic or saturation), spray efficiency, wall condensation, and mixing of the pressurizer water and of the insurge. Also included in the program are data on pressure controlled steam and water relief,valves (total of four), pressure controlled heaters (total of five), pressure controlled spray valve, and various input formats allowing the use of either total surge, surge rate or bulk average temperature for the surge, spray fraction or spray rate for the spray and either temperatures or enthalpies for the surge and spray energies. The program uses steam and water properties in the form of empirical equations where the empirical constants in these equations may be changed depending upon the range of interest of the problem. (auth)

Findlay, J.A.

1961-07-14T23:59:59.000Z

373

Closed orbit feedback with digital signal processing  

SciTech Connect

The closed orbit feedback experiment conducted on the SPEAR using the singular value decomposition (SVD) technique and digital signal processing (DSP) is presented. The beam response matrix, defined as beam motion at beam position monitor (BPM) locations per unit kick by corrector magnets, was measured and then analyzed using SVD. Ten BPMs, sixteen correctors, and the eight largest SVD eigenvalues were used for closed orbit correction. The maximum sampling frequency for the closed loop feedback was measured at 37 Hz. Using the proportional and integral (PI) control algorithm with the gains Kp = 3 and K{sub I} = 0.05 and the open-loop bandwidth corresponding to 1% of the sampling frequency, a correction bandwidth ({minus}3 dB) of approximately 0.8 Hz was achieved. Time domain measurements showed that the response time of the closed loop feedback system for 1/e decay was approximately 0.25 second. This result implies {approximately} 100 Hz correction bandwidth for the planned beam position feedback system for the Advanced Photon Source storage ring with the projected 4-kHz sampling frequency.

Chung, Y.; Kirchman, J.; Lenkszus, F. [and others

1994-08-01T23:59:59.000Z

374

Digital Book Showcases Washington Wind Project | Department of Energy  

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

Digital Book Showcases Washington Wind Project Digital Book Showcases Washington Wind Project Digital Book Showcases Washington Wind Project June 24, 2010 - 12:09pm Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE In what looks and feels more like an e-book on the iPad than a website, a new digital book by Cannon Power Group, a San Diego-based developer of utility-scale wind, tells the story of the construction of a 400 MW wind farm along a 26-mile stretch in Goldendale, Washington, located on a ridgeline plateau about 125 miles east of Portland, Oregon. "The New American Farm" chronicles the stages of the Windy Flats/Windy Point project in seven interactive chapters: from "Prospecting" (finding the right site) to "Planting" (installing 175, 300-foot turbines) to

375

Digital Mapping Of Structurally Controlled Geothermal Features With GPS  

Open Energy Info (EERE)

Digital Mapping Of Structurally Controlled Geothermal Features With GPS Digital Mapping Of Structurally Controlled Geothermal Features With GPS Units And Pocket Computers Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Digital Mapping Of Structurally Controlled Geothermal Features With GPS Units And Pocket Computers Abstract Hand-held global positioning system (GPS) units and pocket personal computers (PCs) were used to map surface geothermal features at the Bradys Hot Springs and Salt Wells geothermal systems, Churchill County, Nevada, in less time and with greater accuracy than would have been possible with conventional mapping methods. Geothermal features that were mapped include fumaroles, mud pots, warm ground, sinter, and a variety of silicified rocks. In both areas, the digital mapping was able to resolve structural

376

Integrating digital design and fabrication and craft production  

E-Print Network (OSTI)

This thesis examines if methods of manual craft production can be utilised to overcome the indeterminacies of physical materials and processes that hinder Digital Design and Fabrication (DDF). Indeterminacies in physical ...

Kamath, Ayodh Vasant

2009-01-01T23:59:59.000Z

377

Semantic representation of digital ink in the classroom learning partner  

E-Print Network (OSTI)

The research presented in this thesis addresses a critical issue in the introduction of new tablet-PC-based educational technology in the classroom: interpretation and semantic representation of digital ink. The teaching ...

Rbeiz, Michel A

2006-01-01T23:59:59.000Z

378

An energy optimal power supply for digital circuits  

E-Print Network (OSTI)

The energy efficiency of digital circuits continues to be a major factor in determining the size and weight of battery-operated electronics. Integration of more functionality in a single system has made battery longevity ...

Ramadass, Yogesh Kumar

2006-01-01T23:59:59.000Z

379

An Interactive System for Compositing Digital Radar and Satellite Data  

Science Conference Proceedings (OSTI)

This paper describes an approach for compositing digital radar data and GOES satellite data for meteorological analysis. The processing is performed on a user-oriented image processing system, and is designed to be used in the research mode. It ...

Gerald M. Heymsfield; Koushik K. Ghosh; Lily C. Chen

1983-05-01T23:59:59.000Z

380

Digital Mapping Of Structurally Controlled Geothermal Features With Gps  

Open Energy Info (EERE)

Digital Mapping Of Structurally Controlled Geothermal Features With Gps Digital Mapping Of Structurally Controlled Geothermal Features With Gps Units And Pocket Computers Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Digital Mapping Of Structurally Controlled Geothermal Features With Gps Units And Pocket Computers Details Activities (1) Areas (1) Regions (0) Abstract: Hand-held global positioning system (GPS) units and pocket personal computers (PCs) were used to map surface geothermal features at the Bradys Hot Springs and Salt Wells geothermal systems, Churchill County, Nevada, in less time and with greater accuracy than would have been possible with conventional mapping methods. Geothermal features that were mapped include fumaroles, mud pots, warm ground, sinter, and a variety of silicified rocks. In both areas, the digital mapping was able to resolve

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


381

T-724: Microsoft Security Advisory: Fraudulent digital certificates could  

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

724: Microsoft Security Advisory: Fraudulent digital certificates 724: Microsoft Security Advisory: Fraudulent digital certificates could allow spoofing T-724: Microsoft Security Advisory: Fraudulent digital certificates could allow spoofing September 22, 2011 - 12:45pm Addthis PROBLEM: Microsoft Security Advisory: Fraudulent digital certificates could allow spoofing. PLATFORM: Microsoft Untrusted Certificate Store: DigiNotar root certificates ABSTRACT: Microsoft has released a Microsoft security advisory about this issue for IT professionals. reference LINKS: MS Article ID: 2616676 Microsoft Security Advisory: 2607712 DOE-CIRC Tech Bulletin: T-706 IMPACT ASSESSMENT: Medium Discussion: The Microsoft update revokes the trust of the following DigiNotar root certificates by putting them in the Microsoft Untrusted Certificate Store:

382

Digital Object Identifiers (DOI) | Scientific and Technical Information  

Office of Scientific and Technical Information (OSTI)

Digital Object Identifiers (DOI) Digital Object Identifiers (DOI) Print page Print page Email page Email page A Digital Object Identifier (DOI) is a permanent, unique name used in the web-based global naming and resolution system that provides for the identification, retrieval, exchange and maintenance of intellectual property. DOIs assist the publishing community with electronic commerce and copyright management of digital objects published on the Internet. Development of the DOI System was initiated in 1997 by the Association of American Publishers, and is now managed by the International DOI Foundation. The DOI System was initially developed by the publishing community but is now a non-profit collaboration to develop infrastructure for persistent identification and management of content. Approximately 2000

383

Record for pi : 51.5 billion decimal digits - CECM  

E-Print Network (OSTI)

From: kanada@pi.cc.u-tokyo.ac.jp (Yasumasa KANADA) Subject: New world record of pi : 51.5 billion decimal digits. Dear pi people;. Now is the time for the ...

384

The authoring of optical videodiscs with digital data  

E-Print Network (OSTI)

The optical videodisc is a publishing medium that permanently stores large amounts of visual and aural data. The technology needed to support videodiscs is understood and available. Digital augmentation of the optical ...

Yelick, Steven

1982-01-01T23:59:59.000Z

385

The New Digital Forecast Database of the National Weather Service  

Science Conference Proceedings (OSTI)

The National Weather Service (NWS) has entered a new era in the production and dissemination of weather information and service to the nation. No longer are textual forecasts the primary medium of dissemination, but a digital database of official ...

Harry R. Glahn; David P. Ruth

2003-02-01T23:59:59.000Z

386

6.111 Introductory Digital Systems Laboratory, Spring 2004  

E-Print Network (OSTI)

Lectures and labs on digital logic, flipflops, PALs, counters, timing, synchronization, finite-state machines, and microprogrammed systems prepare students for the design and implementation of a final project of their ...

Chandrakasan, Anantha P.

387

Web-Based Integration of Printed and Digital Information  

Science Conference Proceedings (OSTI)

The affordances of paper have ensured its retention as a key information medium, in spite of dramatic increases in the use of digital technologies for information storage, processing and delivery. Recent developments in paper, printing and wand technologies ...

Moira C. Norrie; Beat Signer

2003-01-01T23:59:59.000Z

388

Preserving digital media: towards a preservation solution evaluation metric  

Science Conference Proceedings (OSTI)

With an increasing amount of information being digitized or directly created and subsequently existing only electronically, and coupled with an ever increasing variety of file formats and integrated document functionalities, long-term preservation solutions ...

Carl Rauch; Andreas Rauber

2004-12-01T23:59:59.000Z

389

Definitions of Extension Managed Objects for Asymmetric Digital Subscriber Lines  

Science Conference Proceedings (OSTI)

This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes additional managed objects used for managing Asymmetric Digital Subscriber Line (ADSL) ...

F. Ly; G. Bathrick

2002-12-01T23:59:59.000Z

390

Teaching digital hardware by using complex lab projects  

Science Conference Proceedings (OSTI)

Indiana University's Department of Computer Science teaches digital hardware organization and design as a two-semester course sequence at the senior/graduate level. The courses are four credit hours each and have classroom and laboratory components. ...

Franklin Prosser; David Winkel

1987-02-01T23:59:59.000Z

391

Users, technology and space in libraries in the digital age  

E-Print Network (OSTI)

This thesis is a user research study of emerging issues in the use of libraries as public spaces and as information repositories in the digital age. Till recently strong physicality was attached to the library with the ...

G-Chandorkar, Tripti (Gore-Chandorkar)

2005-01-01T23:59:59.000Z

392

Digital ear scanner : measuring the compliance of the ear  

E-Print Network (OSTI)

This paper seeks to resolve the biggest problem with hearing aids, their physical fit. By digitally scanning the ear canal and taking the dynamics of the ear into account the performance and comfort of a hearing aid can ...

Hernandez-Stewart, Daniel

2010-01-01T23:59:59.000Z

393

Wired / unwired : the urban geography of digital networks  

E-Print Network (OSTI)

This dissertation examines the development of digital network infrastructure in the world's great cities at the turn of the 20th century. Drawing upon the concept of cities as information systems and techniques of ...

Townsend, Anthony M. (Anthony Michael), 1973-

2003-01-01T23:59:59.000Z

394

Tangible interfaces for manipulating aggregates of digital information  

E-Print Network (OSTI)

This thesis develops new approaches for people to physically represent and interact with aggregates of digital information. These support the concept of Tangible User Interfaces (TUIs), a genre of human-computer interaction ...

Ullmer, Brygg Anders

2002-01-01T23:59:59.000Z

395

Scalable Access within the Context of Digital Libraries  

E-Print Network (OSTI)

This paper presents a summary of some of the work-in-progress within the Alexandria Digital Library Project. In particular, we present scalable methods of locating information at different levels within a distributed digital library environment. Starting at the high level, we show how queries can be routed to appropriate information sources. At a given source, efficient query processing is supported by using materialized views and multidimensional index structures. Finally, we propose solutions to the problem of storage and retrieval of large objects on secondary and tertiary storage. 1 Introduction Library services provide efficient access to information implicit in collections of information-bearing objects such as text documents and maps. Traditional libraries, based on information in non-digital form, are characterized by a limited set of services that provide relatively coarse-grained access to the information in controlled collections of items. Digital libraries, based on infor...

X. Cheng; R. Dolin; M. Neary; S. Prabhakar; K. V. Ravi; Kanth D. Wu; D. Agrawal; A. El; Abbadi M. Freeston; A. Singh; T. Smith; J. Su

1997-01-01T23:59:59.000Z

396

Advanced digital demodulators for on-board processing payloads  

Science Conference Proceedings (OSTI)

Starting with a short summary of the development status of digital demodulators for on-board processing applications, the motivation for and scope of the COMED development program is given. The requirements specifications and realisation concepts for ...

Bernd Hespeler; Stefan Kull; Christof Kärner

2001-04-01T23:59:59.000Z

397

Chapter generation for digital video recorder based on perceptual clustering  

Science Conference Proceedings (OSTI)

We propose a novel automatic chapter generating technique for digital video recorder (DVR) based on a perceptual clustering. Clustering with two-staged hierarchy is introduced for the first time, showing better performance than previous approaches without ...

M. Yamauchi; M. Kimura; J. Ohmiya; J. Nishikawa; I. Okabayashi

2006-09-01T23:59:59.000Z

398

Applied high resolution digital control for universal precision systems  

E-Print Network (OSTI)

This thesis describes the design and characterization of a high-resolution analog interface for dSPACE digital control systems and a high-resolution, high-speed data acquisition and control system. These designs are intended ...

Gawlik, Aaron John

2008-01-01T23:59:59.000Z

399

Digital making : exploring design with computer controlled fabrication  

E-Print Network (OSTI)

This thesis examines the underlying issues innate to the design process of developing architectural solutions using the digital for "making" architecture, focusing on architectural production. It proposes an alternative ...

Kashyap, Sameer, 1978-

2004-01-01T23:59:59.000Z

400

Materials for Nuclear Power: Digital Resource Center -- Nuclear ...  

Science Conference Proceedings (OSTI)

Use this area to submit digital resources and/or make comments on the resources posted by others. DO NOT use this area of the site to initiate discussion  ...

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


401

Materials for Nuclear Power: Digital Resource Center -- Materials ...  

Science Conference Proceedings (OSTI)

May 7, 2007 ... Use this area to submit digital resources and/or make comments on the resources posted by others. DO NOT use this area of the site to initiate ...

402

A TIME PROJECTION CHAMBER DIGITIZER TEST SYSTEM USING A MICROCOMPUTER  

E-Print Network (OSTI)

R. Nygren, "The Time Projection Chamber", Physics Today, pp.out System for the Time Projection Chamber", IEEE Trans.on Nuclear Science A TIME PROJECTION CHAMBER DIGITIZER TEST

Nunnally, Curtis

2013-01-01T23:59:59.000Z

403

Coastal Oceanography Applications of Digital Image Data from Marine Radar  

Science Conference Proceedings (OSTI)

A marine radar attached to a digital image capture system has been adapted for deployment from shore sites. Optimum operating parameters have been identified in relation to the resolution and sampling capabilities of both the radar and the ...

I. S. Robinson; N. P. Ward; C. P. Gommenginger; M. A. Tenorio-Gonzales

2000-05-01T23:59:59.000Z

404

An Implementation of Key-Based Digital Signal Steganography  

Science Conference Proceedings (OSTI)

A real-life requirement motivated this case study of secure covert communication. An independently researched process is described in detail with an emphasis on implementation issues regarding digital images. A scheme using stego keys to create pseudo-random ...

Toby Sharp

2001-04-01T23:59:59.000Z

405

Formal Methods and Digital Systems Validation for Airborne Systems  

Science Conference Proceedings (OSTI)

This report was prepared to supplement a forthcoming chapter on formal methods in the FAA Digital Systems Validation Handbook. Its purpose is to outline the technical basis for formal methods in computer science, to explain the use of formal methods ...

Rushby John

2003-12-01T23:59:59.000Z

406

Preventive Maintenance Practices for Digital Instrumentation and Control Systems  

Science Conference Proceedings (OSTI)

The lack of industry-accepted preventive maintenance (PM) guidance for digital instrumentation and control (I&C) systems may be leading to failures and inadequate maintenance activities, which may be insufficient or overly conservative. Nuclear plants are installing digital components and I&C systems, especially for non-safety-related applications. In some cases, the PM practices being used are the same as or minor modifications of the practices used for analog equipment and systems. ...

2013-08-12T23:59:59.000Z

407

Rigorous, Systematic Testing of Digital Instrumentation and Control Systems  

Science Conference Proceedings (OSTI)

Newly installed digital Instrumentation and Control (I&C) systems in nuclear plants can exhibit unexpected or undesired behaviors, sometimes with costly results such as unplanned trips or violations of technical specifications. Inadequate testing during digital system development and implementation has been identified both by the Institute of Nuclear Power Operations (INPO) and EPRI as a contributor to recent plant scrams, power reduction events, and unanticipated equipment responses. Therefore, ...

2012-12-01T23:59:59.000Z

408

Query Routing in Large-scale Digital Library Systems  

E-Print Network (OSTI)

Modern digital libraries require user-friendly and yet responsive access to the rapidly growing, heterogeneous, and distributed collection of information sources. However, the increasing volume and diversity of digital information available online have led to a growing problem that conventional data management systems do not have, namely #nding which information sources out of many candidate choices are the most relevant to answer a given user query.We refer to this problem as the query routing problem.

Ling Liu

1997-01-01T23:59:59.000Z

409

Digital Operating Experience in the Republic of Korea  

Science Conference Proceedings (OSTI)

This report documents an investigation of digital system operating experience in Korea Hydro Nuclear Power (KHNP) nuclear plants, with a focus on events in which software common-cause failure (CCF) was or could have been a significant factor. CCF remains an unsettled technical and regulatory issue, both for new plants and for digital upgrades at operating plants. The concern is the potential for CCFs to disable multiple equipment trains or systems that use identical software-based components.

2011-11-22T23:59:59.000Z

410

Training Module for Cyber Security in Nuclear Plant Digital Modifications  

Science Conference Proceedings (OSTI)

Nuclear power plants face increasing regulatory requirements from the U.S. Nuclear Regulatory Commission (NRC) and the Federal Energy Regulatory Commission (FERC) for cyber security of digital devices, components, and systems. The focus of these cyber security requirements is to protect plant digital computer systems, communications systems, and networks from cyber attacks that would affect reactor safety or generation reliability. This Electric Power Research Institute (EPRI) computer-based training mod...

2011-04-28T23:59:59.000Z

411

MULTIPLE INPUT BINARY ADDER EMPLOYING MAGNETIC DRUM DIGITAL COMPUTING APPARATUS  

DOE Patents (OSTI)

A digital computing apparatus is described for adding a plurality of multi-digit binary numbers. The apparatus comprises a rotating magnetic drum, a recording head, first and second reading heads disposed adjacent to the first and second recording tracks, and a series of timing signals recorded on the first track. A series of N groups of digit-representing signals is delivered to the recording head at time intervals corresponding to the timing signals, each group consisting of digits of the same significance in the numbers, and the signal series is recorded on the second track of the drum in synchronism with the timing signals on the first track. The multistage registers are stepped cyclically through all positions, and each of the multistage registers is coupled to the control lead of a separate gate circuit to open the corresponding gate at only one selected position in each cycle. One of the gates has its input coupled to the bistable element to receive the sum digit, and the output lead of this gate is coupled to the recording device. The inputs of the other gates receive the digits to be added from the second reading head, and the outputs of these gates are coupled to the adding register. A phase-setting pulse source is connected to each of the multistage registers individually to step the multistage registers to different initial positions in the cycle, and the phase-setting pulse source is actuated each N time interval to shift a sum digit to the bistable element, where the multistage register coupled to bistable element is operated by the phase- setting pulse source to that position in its cycle N steps before opening the first gate, so that this gate opens in synchronism with each of the shifts to pass the sum digits to the recording head.

Cooke-Yarborough, E.H.

1960-12-01T23:59:59.000Z

412

Curating Architectural 3D CAD Models  

E-Print Network (OSTI)

Increasing demand to manage and preserve 3-dimensional models for a variety of physical phenomena (e.g., building and engineering designs, computer games, or scientific visualizations) is creating new challenges for digital ...

Smith, MacKenzie

413

Numerical Simulation and Modelling of Electronic and Biochemical Systems  

Science Conference Proceedings (OSTI)

Numerical simulation and modelling are witnessing a resurgence. Designing systems with integrated wireless components, mixed-signal blocks and nanoscale, multi-GHz "digital" circuits is requiring extensive low-level modelling and simulation. Analysis ...

Jaijeet Roychowdhury

2009-02-01T23:59:59.000Z

414

Environmental testing of an experimental digital safety channel  

SciTech Connect

This document presents the results of environmental stress tests performed on an experimental digital safety channel (EDSC) assembled at the Oak Ridge National Laboratory (ORNL) as part of the NRC-sponsored Qualification of Advanced Instrumentation and Controls (W) System program. The objective of this study is to investigate failure modes and vulnerabilities of microprocessor-based technologies when subjected to environmental stressors. The study contributes to the technical basis for environmental qualification of safety-related digital I&C systems. The EDSC employs technologies and digital subsystems representative of those proposed for use in advanced light-water reactors (ALWRs) or for retrofits in existing plants. Subsystems include computers, electrical and optical serial communication links, fiber-optic network links, analog-to-digital and digital-to-analog converters, and multiplexers. The EDSC was subjected to selected stressors that are a potential risk to digital equipment in a mild environment. The selected stressors were electromagnetic and radio-frequency interference (EMYRFI), temperature, humidity, and smoke exposure. The stressors were applied over ranges that were considerably higher than what the channel is likely to experience in a normal nuclear power plant environment. Ranges of stress were selected at a sufficiently high level to induce errors so that failure modes that are characteristic of the technologies employed could be identified.

Korsah, K.; Tanaka, T.J.; Wilson, T.L. Jr.; Wood, R.T.

1996-09-01T23:59:59.000Z

415

Integrated Computational Materials Engineering: Digital Resource ...  

Science Conference Proceedings (OSTI)

Feb 15, 2007 ... For other multi-scale computational research project descriptions including: " Computational Modeling of Fatigue, Fracture, and Ductile Failure ...

416

Digital Manufacturing and Design Innovation (DMDI) Institute  

Science Conference Proceedings (OSTI)

... Advanced Analysis: This area capitalizes on advances in high-performance computing to develop physics-based models of material performance ...

2013-05-08T23:59:59.000Z

417

W.: Auto Cropping for Digital Photographs  

E-Print Network (OSTI)

In this paper, we propose an effective approach to the nearly untouched problem, still photograph auto cropping, which is one of the important features to automatically enhance photographs. To obtain an optimal result, we first formulate auto cropping as an optimization problem by defining an energy function, which consists of three sub models: composition sub model, conservative sub model and penalty sub model. Then, particle swarm optimization (PSO) is employed to obtain the optimal solution by maximizing the objective function. Experimental results and user studies over hundreds of photographs show that the proposed approach is effective and accurate in most cases, and can be used in many practical multimedia applications. 1.

Mingju Zhang

2005-01-01T23:59:59.000Z

418

elevated temperature coatings:science and technology iv  

Science Conference Proceedings (OSTI)

Vladamir K. Tolpygo and David R. Clarke. MODELING .... R. Keith Bird, Terryl A. Wallace and. Sankara N. ... Narendra B. Dahotre and Lalitha R. Katipelli.

419

The Effect of Elevated Temperature on Concrete Materials and Structures - a Literature Review.  

Science Conference Proceedings (OSTI)

The objective of this limited study was to provide an overview of the effects of elevated temperature on the behavior of concrete materials and structures. In meeting this objective the effects of elevated temperatures on the properties of ordinary Portland cement concrete constituent materials and concretes are summarized. The effects of elevated temperature on high-strength concrete materials are noted and their performance compared to normal strength concretes. A review of concrete materials for elevated-temperature service is presented. Nuclear power plant and general civil engineering design codes are described. Design considerations and analytical techniques for evaluating the response of reinforced concrete structures to elevated-temperature conditions are presented. Pertinent studies in which reinforced concrete structural elements were subjected to elevated temperatures are described.

Naus, Dan J [ORNL

2006-03-01T23:59:59.000Z

420

Evaluation of Generic EBS Design Concepts and Process Models...  

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

temperatures and pressures; 4) thermodynamic modeling and database development; 5) Molecular Dynamics (MD) study of clay hydration at ambient and elevated temperatures; and 6)...

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


421

Elsevier Editorial System(tm) for Computer Vision and Image Understanding Manuscript Draft Manuscript Number: Title: Terrain Modelling from lidar range data in natural landscapes: a predictive and Bayesian framework Article Type: Special Issue: New Advanc  

E-Print Network (OSTI)

Abstract: The Earth's topography, including vegetation and human-made features, reduced to a virtual 3D representation is a key geographic layer for any extended development or risk management project. Processed from multiple aerial images, or from airborne lidar systems, the 3D topography is first represented as a point cloud. This article deals with the generation of Digital Terrain Models in natural landscapes. We present a global methodology for estimating the terrain height by deriving a predictive filter paradigm. Under the assumption that the terrain topography (elevation and slope) is regular in a neighbouring system, a predictive filter combines linearly the predicted topographic values and the effective measured values. In this paper, it is applied to 3D lidar data which are known to be of high altimetric accuracy. The algorithm generates an adaptive local geometry wherein the altimetric distribution of the point cloud is analysed. Since local terrain elevations depend on the local slope, a predictive filter is first applied on the slopes then on the terrain elevations. The algorithm propagates through the point cloud following specific rules in order to optimize the probability of computing areas containing terrain points. Considered as an initial surface, theprevious DTM is finally regularized in a Bayesian framework. Our approach is based on the definition of an energy function that manages the evolution of a terrain surface. The energy is designed as a compromise between a data attraction term and a regularization term. The minimum of this energy corresponds to the

unknown authors

2008-01-01T23:59:59.000Z

422

Erosion-Corrosion of Iron and Nickel Alloys at Elevated Temperature...  

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

gases flow 4. Erosion-corrosion occurs when the gas entrained coal ash impacts the boiler components in the elevated temperature combustion gas environment. This work...

423

Wind Shear and Turbulence Profiles at Elevated Heights: Great Lakes and Midwest Sites (Poster)  

DOE Green Energy (OSTI)

Analyzed wind resource characteristics at elevated heights (50 m-200+m) incuding shear and turbulence profiles for some areas of the Great Lakes and M idwest sites.

Elliott, D.; Schwartz, M.; Scott, G.

2009-05-01T23:59:59.000Z

424

The UCONABC usage control model  

Science Conference Proceedings (OSTI)

In this paper, we introduce the family of UCONABC models for usage control (UCON), which integrate Authorizations (A), oBligations (B), and Conditions (C). We call these core models because they address the essence of UCON, leaving ... Keywords: access control, digital rights management, privacy, trust, usage control

Jaehong Park; Ravi Sandhu

2004-02-01T23:59:59.000Z

425

Investigation on digitized RF transport over fiber.  

E-Print Network (OSTI)

??Finally, the thesis investigates the power consumptions and energy-saving potentials of the fiber-wireless integration techniques. A mathematical model for estimating the base station power consumption… (more)

Yang, Yizhuo

2011-01-01T23:59:59.000Z

426

Affordable Digital Planetariums with WorldWide Telescope  

E-Print Network (OSTI)

Digital planetariums can provide a broader range of educational experiences than the more classical planetariums that use star-balls. This is because of their ability to project images, content from current research and the 3D distribution of the stars and galaxies. While there are hundreds of planetariums in the country the reason that few of these are full digital is the cost. In collaboration with Microsoft Research (MSR) we have developed a way to digitize existing planetariums for approximately \\$40,000 using software freely available. We describe here how off the shelf equipment, together with MSR's WorldWide Telescope client can provide a rich and truly interactive experience. This will enable students and the public to pan though multi-wavelength full-sky scientific data sets, explore 3d visualizations of our Solar System (including trajectories of millions of minor planets), near-by stars, and the SDSS galaxy catalog.

Rosenfield, Philip; Fay, Jonathan; Carey, Larry; Sayres, Conor; Tofflemire, Benjamin

2010-01-01T23:59:59.000Z

427

Classification of Multispectral High-Resolution Satellite Imagery Using LIDAR Elevation Data  

Science Conference Proceedings (OSTI)

This paper studies the influence of airborne LIDAR elevation data on the classification of multispectral SPOT5 imagery over a semi-urban area; to do this, multispectral and LIDAR elevation data are integrated in a single imagery file composed of independent ... Keywords: Classification, LIDAR, Satellite Imagery, Support Vector Machine

María C. Alonso; José A. Malpica

2008-12-01T23:59:59.000Z

428

The effect of multiple entrances on the elevator round trip time under up-peak traffic  

Science Conference Proceedings (OSTI)

The design of vertical transportation systems relies on the calculation of the interval as an indicator of the quality of service. This in turn involves the accurate calculation of the round trip time of a single elevator. The calculation of the round ... Keywords: Basement, Elevator, Interval, Lift, Round trip time, Up peak traffic

Lutfi Al-Sharif

2010-08-01T23:59:59.000Z

429

Sublimation of Intercepted Snow within a Subalpine Forest Canopy at Two Elevations  

Science Conference Proceedings (OSTI)

To determine how elevation affects the sublimation rate from intercepted snow within a subalpine forest canopy, a cut subalpine fir and an artificial conifer were weighed at each of two elevations (3230 and 2920 m) at a U.S. continental site (39°...

James Montesi; Kelly Elder; R. A. Schmidt; Robert E. Davis

2004-10-01T23:59:59.000Z

430

High Temperature Measurements Of Martensitic transformations Using Digital Holography  

SciTech Connect

During thermal cycling of nickel-aluminum-platinum (NiAlPt) and single crystal Fe-15Cr-15Ni alloys, the structural changes associated with the martensite to austenite phase transformation were measured using dual-wavelength digital holography. Real-time in-situ measurements reveal the formation of striations within the NiPtAl alloy at 70 C and the FeCrNi alloy at 520 C. The results demonstrate that digital holography is an effective technique for acquiring non-contact, high precision information of the surface evolution of alloys at high temperatures.

Thiesing, Benjamin [Northern Arizona University; Mann, Christopher J [Northern Arizona University; Dryepondt, Sebastien N [ORNL

2013-01-01T23:59:59.000Z

431

Digital intermediate frequency QAM modulator using parallel processing  

DOE Patents (OSTI)

The digital Intermediate Frequency (IF) modulator applies to various modulation types and offers a simple and low cost method to implement a high-speed digital IF modulator using field programmable gate arrays (FPGAs). The architecture eliminates multipliers and sequential processing by storing the pre-computed modulated cosine and sine carriers in ROM look-up-tables (LUTs). The high-speed input data stream is parallel processed using the corresponding LUTs, which reduces the main processing speed, allowing the use of low cost FPGAs.

Pao, Hsueh-Yuan (Livermore, CA); Tran, Binh-Nien (San Ramon, CA)

2008-05-27T23:59:59.000Z

432

3D Object Digitization: Majority Interpolation and Marching Cubes  

E-Print Network (OSTI)

In a previous paper we showed that a 3D object can be digitized without changing the topology if the object is r-regular and if the reconstruction method fulfills certain requirements. In this paper we give two important examples for such reconstruction methods. First, we introduce Majority Interpolation, an algorithm to interpolate sampling points at doubled resolution such that topological ambiguities are resolved. Second, we show how the well-known Marching Cubes algorithm has to be modified such that it is topology preserving. This is the first approach of digitizing 3D objects which guarantees topology preservation for voxel-based or polygonal surface-based reconstructions. 1

Peer Stelldinger

2006-01-01T23:59:59.000Z

433

Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies  

E-Print Network (OSTI)

Permission to make digital or hard copies of all or part of this work for personal or classroom use Point Model: a user has repeatedly acquired the shown crosshairs using finger postures ranging from 90 than capacitive sensing. INTRODUCTION Acquiring a small target on a touch screen is error prone. We can

Baudisch, Patrick

434

Critical reflection in a digital media artwork - Playas: homeland mirage  

E-Print Network (OSTI)

The introduction of digital media into the working practice of artists has produced challenges previously unknown to the field of art. This inquiry follows an atypical model of artist-driven research derived from disciplines such as social science and education. Here, an artwork functions as a model that is self-reflective, integrating methodologies in a form that benefits art and science. Using Naturalistic Inquiry, including semi-structured interviews of fifteen participants, the work illustrates a process of creation, analysis and evaluation that places the values of the artist on equal footing with the needs of science. Recently, artists have begun using video game engines as a tool to produce 3D navigable spaces. Using the hybrid video game/installation Playas: Homeland Mirage as a case study, this research examines the impact of technology on the artwork and identifies a number of key issues related to the function of critical reflection in this environment. Rules-of-play were a fundamental pre-requisite to the stimulation of critically reflective experience. The human interface with software and hardware was also a primary factor in reflective experience. Based on participant evaluation and observation, the interface was altered in response to its effect on critical reflection, illustrating how choices in this area impact aesthetic experience. Those with experience in visual art were more likely to engage the work in a critically reflective manner than seasoned video game players who tended to be more interested in scoring and winning. These findings and others inform our understanding of the stimulation of critical reflection in immersive environments and show how we can sensitively integrate technology with meaningful evaluative methods. By repurposing a video game in this manner, we learn about the nature of the video game and the nature of art. This research enables artists to gain a better understanding of the medium to more fully integrate technology within a meaningful practice. Conversely, other fields will benefit from a better understanding of the stimulation of meaning in immersive spaces and gain a comprehensive view of a work that strives to contribute to our culture on a deeper level than as simple entertainment. Ultimately, more fully understanding critical reflection in virtual environments will enable us to create enriched experiences that transcend space to create “real” or “virtual” place.

Stenner, Jack Eric

2007-08-01T23:59:59.000Z

435

V-101: McAfee VirusScan Enterprise Lets Local Users Gain Elevated  

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

1: McAfee VirusScan Enterprise Lets Local Users Gain Elevated 1: McAfee VirusScan Enterprise Lets Local Users Gain Elevated Privileges V-101: McAfee VirusScan Enterprise Lets Local Users Gain Elevated Privileges February 28, 2013 - 12:05am Addthis PROBLEM: McAfee VirusScan Enterprise Lets Local Users Gain Elevated Privileges PLATFORM: VSE 8.8 Patch 2 with Access Protection, including Self Protection, turned off ABSTRACT: A vulnerability was reported in McAfee VirusScan Enterprise. REFERENCE LINKS: McAfee Security Bulletins ID: SB10038 SecurityTracker Alert ID: 1028209 IMPACT ASSESSMENT: Medium DISCUSSION: When Access Protection has been disabled, a local user can gain full control of the target application IMPACT: A local user can obtain elevated privileges on the target system. SOLUTION: The vendor has issued a fix (8.8 Patch 2 with HF778101, 8.8 Patch 3)

436

U-194: Symantec LiveUpdate Administrator Lets Local Users Gain Elevated  

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

4: Symantec LiveUpdate Administrator Lets Local Users Gain 4: Symantec LiveUpdate Administrator Lets Local Users Gain Elevated Privledges U-194: Symantec LiveUpdate Administrator Lets Local Users Gain Elevated Privledges June 19, 2012 - 7:00am Addthis PROBLEM: Symantec LiveUpdate Administrator Lets Local Users Gain Elevated Privileges . PLATFORM: Version(s): 2.3 and prior versions Abstract: Users Gain Elevated Privileges reference LINKS: Vendor Advisory SecurityTracker Alert ID: 1027182 CVE-2012-0304 IMPACT ASSESSMENT: Medium Discussion: A vulnerability was reported in Symantec LiveUpdate Administrator. A local user can obtain elevated privileges on the target system.The default installation of Symantec LiveUpdate Administrator installs files with full control privileges granted to the 'Everyone' group.A local user can exploit

437

U-040: HP-UX System Administration Manager Lets Local Users Gain Elevated  

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

0: HP-UX System Administration Manager Lets Local Users Gain 0: HP-UX System Administration Manager Lets Local Users Gain Elevated Privileges U-040: HP-UX System Administration Manager Lets Local Users Gain Elevated Privileges November 17, 2011 - 8:00am Addthis PROBLEM: HP-UX System Administration Manager Lets Local Users Gain Elevated Privileges. PLATFORM: HP-UX B.11.11, B.11.23, B.11.31; running Enterprise Mobility Suite (EMS) prior to A.04.20.11.04_01 ABSTRACT: A local user can obtain elevated privileges on the target system. reference LINKS: HP Support Center Document ID: c03089106 CVE-2011-4159 SecurityTracker Alert ID: 1026331 IMPACT ASSESSMENT: Medium Discussion: A vulnerability was reported in HP-UX System Administration Manager. A local user can obtain elevated privileges on the target system. A local user can gain full control of the target system.

438

U-040: HP-UX System Administration Manager Lets Local Users Gain Elevated  

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

40: HP-UX System Administration Manager Lets Local Users Gain 40: HP-UX System Administration Manager Lets Local Users Gain Elevated Privileges U-040: HP-UX System Administration Manager Lets Local Users Gain Elevated Privileges November 17, 2011 - 8:00am Addthis PROBLEM: HP-UX System Administration Manager Lets Local Users Gain Elevated Privileges. PLATFORM: HP-UX B.11.11, B.11.23, B.11.31; running Enterprise Mobility Suite (EMS) prior to A.04.20.11.04_01 ABSTRACT: A local user can obtain elevated privileges on the target system. reference LINKS: HP Support Center Document ID: c03089106 CVE-2011-4159 SecurityTracker Alert ID: 1026331 IMPACT ASSESSMENT: Medium Discussion: A vulnerability was reported in HP-UX System Administration Manager. A local user can obtain elevated privileges on the target system. A local user can gain full control of the target system.

439

V-101: McAfee VirusScan Enterprise Lets Local Users Gain Elevated  

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

1: McAfee VirusScan Enterprise Lets Local Users Gain Elevated 1: McAfee VirusScan Enterprise Lets Local Users Gain Elevated Privileges V-101: McAfee VirusScan Enterprise Lets Local Users Gain Elevated Privileges February 28, 2013 - 12:05am Addthis PROBLEM: McAfee VirusScan Enterprise Lets Local Users Gain Elevated Privileges PLATFORM: VSE 8.8 Patch 2 with Access Protection, including Self Protection, turned off ABSTRACT: A vulnerability was reported in McAfee VirusScan Enterprise. REFERENCE LINKS: McAfee Security Bulletins ID: SB10038 SecurityTracker Alert ID: 1028209 IMPACT ASSESSMENT: Medium DISCUSSION: When Access Protection has been disabled, a local user can gain full control of the target application IMPACT: A local user can obtain elevated privileges on the target system. SOLUTION: The vendor has issued a fix (8.8 Patch 2 with HF778101, 8.8 Patch 3)

440

U-112: PostgreSQL Bugs Let Remote Authenticated Users Gain Elevated  

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

2: PostgreSQL Bugs Let Remote Authenticated Users Gain Elevated 2: PostgreSQL Bugs Let Remote Authenticated Users Gain Elevated Privileges, Inject SQL Commands, and Spoof Certificates U-112: PostgreSQL Bugs Let Remote Authenticated Users Gain Elevated Privileges, Inject SQL Commands, and Spoof Certificates February 28, 2012 - 8:45am Addthis PROBLEM: A vulnerability was reported in PostgreSQL. PLATFORM: Version(s): prior to 8.3.18, 8.4.11, 9.0.7, 9.1.3 ABSTRACT: A remote authenticated user can gain elevated privileges. A remote authenticated user can inject SQL commands. A remote user can spoof connections in certain cases. reference LINKS: Vendor Advisory Security Tracker ID 1026744 CVE-2012-0866 IMPACT ASSESSMENT: Medium Discussion: For trigger functions marked SECURITY DEFINER, a remote authenticated user can execute a trigger function and gain elevated privileges CVE-2012-0866.

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


441

U-068:Linux Kernel SG_IO ioctl Bug Lets Local Users Gain Elevated  

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

8:Linux Kernel SG_IO ioctl Bug Lets Local Users Gain Elevated 8:Linux Kernel SG_IO ioctl Bug Lets Local Users Gain Elevated Privileges U-068:Linux Kernel SG_IO ioctl Bug Lets Local Users Gain Elevated Privileges December 23, 2011 - 8:45am Addthis PROBLEM: Linux Kernel SG_IO ioctl Bug Lets Local Users Gain Elevated Privileges PLATFORM: Red Hat Enterprise Linux Desktop (v. 6) Red Hat Enterprise Linux HPC Node (v. 6) Red Hat Enterprise Linux Server (v. 6) Red Hat Enterprise Linux Server AUS (v. 6.2) Red Hat Enterprise Linux Server EUS (v. 6.2.z) Red Hat Enterprise Linux Workstation (v. 6) ABSTRACT: A local privileged user on the guest operating system can obtain elevated privileges on the target system. reference LINKS: Red Hat kernel security and bug fix update SecurityTracker Alert ID: 1026453 SecurityTracker Alert ID: 1026454

442

T-563: Red Hat Directory Server Bugs Let Local Users Gain Elevated  

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

3: Red Hat Directory Server Bugs Let Local Users Gain Elevated 3: Red Hat Directory Server Bugs Let Local Users Gain Elevated Privileges and Remote and Local Users Deny Service T-563: Red Hat Directory Server Bugs Let Local Users Gain Elevated Privileges and Remote and Local Users Deny Service February 23, 2011 - 7:00am Addthis PROBLEM: Red Hat Directory Server Bugs Let Local Users Gain Elevated Privileges and Remote and Local Users Deny Service. PLATFORM: Red Hat Directory Server v8 EL4, Red Hat Directory Server v8 EL5 ABSTRACT: Several vulnerabilities were reported in Red Hat Directory Server. A local user can obtain elevated privileges on the target system. A remote user can cause denial of service conditions. A local user can cause denial of service conditions. A remote user can send multiple simple paged search requests to cause the

443

Atmospheric Dispersion from Elevated Sources in an Urban Area: Comparison between Tracer Experiments and Model Calculations  

Science Conference Proceedings (OSTI)

Atmospheric dispersion experiments were carried out in the Copenhagen area under neutral and unstable conditions. The tracer sulphurhexafluoride was released without buoyancy from a tower at a height of 115 m and then collected at ground-level ...

Sven-Erik Gryning; Erik Lyck

1984-04-01T23:59:59.000Z

444

Blood proteolytic activity elevation and plasma protein degradation in spontaneously hypertensive rat models  

E-Print Network (OSTI)

lymphoblastoid cell lines (LCLs) derived from individualsby profiling gene expression in LCLs derived from livingsubjects. LCLs derived from (1) three monozygotic twin pairs

Chow, Jason C

2011-01-01T23:59:59.000Z

445

Blood proteolytic activity elevation and plasma protein degradation in spontaneously hypertensive rat models  

E-Print Network (OSTI)

G-protein alpha s, H-Ras, NF-kB, pard6, PI3K cat class IA,G-protein alpha-s, H-Ras, NF-kB, Pi3k cat class IA, PKA-cat,Beta-catenin, MDM2, MMP-2, NF-kb, PIAS2, SUMO- 1, XPA, p21

Chow, Jason C

2011-01-01T23:59:59.000Z

446

Expressive processing: on the process-intensive literature and digital media  

Science Conference Proceedings (OSTI)

Most studies of digital media focus on elements familiar from traditional media. For example, studies of digital literature generally focus on surface text and audience experience. Interaction is considered only from the audience's perspective. This ...

Noah Wardrip-Fruin / Andries Van Dam

2006-01-01T23:59:59.000Z

447

OpenEI part of the Federal Digital Strategy | OpenEI Community  

Open Energy Info (EERE)

OpenEI part of the Federal Digital Strategy OpenEI part of the Federal Digital Strategy Home > Blogs > Graham7781's blog Graham7781's picture Submitted by Graham7781(1992) Super contributor 19 September, 2012 - 14:32 data Federal Digital Strategy OpenEI resources The Federal Digital Strategy is a publication that was put out on May 23rd of 2012 detailing how the current Administration plans to use digital information to help businesses, teachers, soldiers, and many other Americans benefit from readily-available digital information. You can view the full publication here Recently, OpenEI was added the list of resources that are helping support the Federal Digital Strategy "To support the Federal Digital Strategy, the Department has created mobile applications, API powered datasets, and websites designed for the

448

CMOS Digital Imager Design from a System-on-a-chip Perspective  

Science Conference Proceedings (OSTI)

Due to substantial mixed analog-digital circuitintegration in one chip, CMOS digital imager cannot beconsidered only as a photoelectric transducer. In thispaper, we have identified timing and circuit layoutconsiderations that are critical for implementing ...

Bedabrata Pain; Bruce Hancock; Thomas Cunningham; Guang Yang; Suresh Seshadri; Julie Heynssens; Chris Wrigley

2003-01-01T23:59:59.000Z

449

Delta-Sigma digital-RF modulation for high data rate transmitters  

E-Print Network (OSTI)

A low power, wideband wireless transmitter utilizing [Delta]-[Sigma] direct digital modulation of an RF carrier is presented. The transmitter architecture replaces high dynamic range analog circuits with high speed digital ...

Jerng, Albert

2007-01-01T23:59:59.000Z

450

Design of ultra low power analog-to-digital converter for ambulatory EEG recording  

E-Print Network (OSTI)

Portable acquisition of biopotential signals requires the design of compact, energy efficient circuits and systems. Such systems typically include analog-to-digital converter for digitizing signals from AFE and feeding it ...

El-Damak, Dina Reda

2012-01-01T23:59:59.000Z

451

Proceedings of the 6th ACM/IEEE-CS joint conference on Digital libraries  

Science Conference Proceedings (OSTI)

Welcome to JCDL 2006. The ACM/IEEE Joint Conference on Digital Libraries (JCDL) is a major international forum focusing on digital libraries and associated technical, practical, and social issues. JCDL encompasses the many meanings of the term ...

Gary Marchionini; Michael L. Nelson; Catherine C. Marshall

2006-06-01T23:59:59.000Z

452

The FreeD - A Handheld Digital Milling Device for Craft and Fabrication  

E-Print Network (OSTI)

We present an approach to combine digital fabrication and craft that is focused on a new fabrication experience. The FreeD is a hand-held, digitally controlled, milling device. It is guided and monitored by a computer while ...

Paradiso, Joseph

453

A zero-crossing based pipelined analog-to-digital converter with supply voltage scalibility  

E-Print Network (OSTI)

A zero-crossing based pipelined analog-to-digital converter (ADC) has been designed and is fabricated in a 65nm CMOS process. The highly digital implementation characteristic of the zero-crossing detection technique enables ...

Lee, Sunghyuk

2010-01-01T23:59:59.000Z

454

Constitutive equations for meeting elevated-temperature-design needs  

SciTech Connect

Constitutive equations for representing the inelastic behavior of structural alloys at temperatures in the creep regime are discussed from the viewpoint of advances made over the past decade. An emphasis is placed on the progress that has been made in meeting the needs of the program whose design process is based in part on a design-by-inelastic-analysis approach. In particular, the constitutive equations that have been put into place for current use in design analyses are discussed along with some material behavior background information. Equations representing short-term plastic and long-term creep behaviors are considered. Trends towards establishing improved equations for use in the future are also described. Progress relating to fundamentals of continuum mechanics, physical modeling, phenomenological modeling, and implementation is addressed.

Pugh, C.E.; Robinson, D.N.

1981-01-01T23:59:59.000Z

455

Designing with mobile digital storytelling in rural Africa  

Science Conference Proceedings (OSTI)

We reflect on activities to design a mobile application to enable rural people in South Africa's Eastern Cape to record and share their stories, which have implications for 'cross-cultural design,' and the wider use of stories in design. We based our ... Keywords: cross-cultural, dialogical approach to design, digital storytelling, ict4d, mobile devices, oral knowledge, rural

Nicola J. Bidwell; Thomas Reitmaier; Gary Marsden; Susan Hansen

2010-04-01T23:59:59.000Z

456

Role for Distributed Energy Resources (DER) in the Digital Economy  

SciTech Connect

A large, and growing, part of the Nation's economy either serves or depends upon the information technology industry. These high-tech or "digital" enterprises are characterized by a dependence on electronic devices, need for completely reliable power supply, and intolerance to any power quality problems. In some cases these enterprises are densely populated with electronic loads and have very high energy usage per square foot. Serving these enterprises presents both electric power and equipment cooling challenges. Traditional electric utilities are often hard-pressed to deliver power that meets the stringent requirements of digital customers, and the economic and social consequences of a service quality or reliability problem can be large. New energy delivery and control options must be developed to effectively serve a digital economy. This report explores how distributed energy resources, partnerships between utility and customer to share the responsibility for service quality, innovative facility designs, higher energy efficiencies and waste-heat utilization can be coupled to meet the needs of a growing digital economy.

Key, Thomas S [Electric Power Research Institute (EPRI)

2007-11-01T23:59:59.000Z

457

Reviren: augmenting virtual environments with personal digital assistants  

Science Conference Proceedings (OSTI)

Our research group is currently embarked on building cheap display-based virtual environments. With the use of Personal Digital Assistants becoming more widespread and commonplace, there is a need to investigate ways of allowing them to integrate better ... Keywords: design, dynamic interface, human factors, mobile interface, virtual environment control

Richard Schroder; Marc Bosma; Andrew Cousins; Gary Marsden

2004-10-01T23:59:59.000Z

458

Failure Analysis of Digital Instrumentation and Control Equipment and Systems  

Science Conference Proceedings (OSTI)

This interim report documents an investigation of digital system failure analysis techniques that may be of use in improving the effectiveness and efficiency of currently applied techniques. The study considered both top-down approaches, such as fault tree analysis, and bottom-up approaches, such as failure modes and effects analysis (FMEA), applying them to realistic examples to assess their potential value.

2011-12-21T23:59:59.000Z

459

Weathergods: tangible interaction in a digital tabletop game  

Science Conference Proceedings (OSTI)

In this paper we describe the game 'Weathergods', which is implemented on the Entertaible tabletop gaming platform [1]. The game uses either iconic or symbolic [2] tangible objects for interaction and marries both the advantages of traditional board ... Keywords: digital tabletop gaming, interaction design, pervasive games, tangible interaction, tangible user interfaces

Saskia Bakker; Debby Vorstenbosch; Elise van den Hoven; Gerard Hollemans; Tom Bergman

2007-02-01T23:59:59.000Z

460

32kg: performance systems for a post-digital age  

Science Conference Proceedings (OSTI)

Why is a seemingly mundane issue such as airline baggage allowance of great significance in regards to the performance practice of electronic music? This paper discusses how a performance practice has evolved that seeks to question the binary and corporate ... Keywords: DIY, bastardisation, dirty electronics, eBay, live electronics, modular, performance, portability, post-digital, punktronics

John Richards

2006-06-01T23:59:59.000Z

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


461

AUTOMATIC SOLUTION OF OPTIMUM DESIGN PROBLEMS ON A DIGITAL COMPUTER  

SciTech Connect

A description is given of a method suitable for the automatic solution of certain optimum design problems on a digital computer for cases where the number of constraints imposed on the design is not greater than the number of design variables. The problem is transformed to one requiring the minimization or maximization of an unconstrained function, for which a gradient method is used. (auth)

Lawrence, B.R.

1962-03-01T23:59:59.000Z

462

Visual search applications for connecting published works to digital material  

Science Conference Proceedings (OSTI)

Visual search connects physical (offline) objects with (online) digital media. Using objects from the environment, like newspapers, magazines, books and posters, we can retrieve supplemental information from the online world. In this demonstration, ... Keywords: augmented reality, mobile application, publishing, tangible interface, visual search

Jamey Graham; Jorge Moraleda; Jonathan J. Hull; Timothee Bailloeul; Xu Liu; Andrea Mariotta

2010-10-01T23:59:59.000Z

463

Digital government and citizen participation in international context  

Science Conference Proceedings (OSTI)

This book provides abundant evidence that the shift towards digital government is part of a sweeping set of changes. These are best viewed holistically, as they relate to pervasive shifts in the locus and purpose of many forms of control. These changes ...

Karin Geiselhart

2004-01-01T23:59:59.000Z

464

Medical Image Integrity Control Combining Digital Signature and Lossless Watermarking  

E-Print Network (OSTI)

Medical Image Integrity Control Combining Digital Signature and Lossless Watermarking W. Pan1,3 , G protection of medical content becomes a major issue of computer security. Since medical contents are more proposed as a com- plementary mechanism for medical data protection. In this paper, we focus

Paris-Sud XI, Université de

465

Automatic organization for digital photographs with geographic coordinates  

Science Conference Proceedings (OSTI)

We describe PhotoCompas, a system that utilizes the time and location information embedded in digital photographs to automatically organize a personal photo collection PhotoCompas produces browseable location and event hierarchies for the collection. ... Keywords: GPS, geo-referenced photos, personal photo collection, photo browser

Mor Naaman; Yee Jiun Song; Andreas Paepcke; Hector Garcia-Molina

2004-06-01T23:59:59.000Z

466

A digital preservation network appliance based on OpenBSD  

Science Conference Proceedings (OSTI)

The LOCKSS program has developed and deployed in a world-wide test a system for preserving access to academic journals published on the Web. The fundamental problem for any digital preservation system is that it must be affordable for the long term. ...

David S. H. Rosenthal

2003-09-01T23:59:59.000Z

467

Disrupting digital library development with scenario informed design  

Science Conference Proceedings (OSTI)

In recent years, there has been great interest in scenario-based design and other forms of user-centred design. However, there are many design processes that, often for good reason, remain technology-centred. We present a case study of introducing scenarios ... Keywords: Digital libraries, Scenario based design, Software development processes, Usability evaluation

Ann Blandford; Suzette Keith; Richard Butterworth; Bob Fields; Dominic Furniss

2007-01-01T23:59:59.000Z

468

Digital Science and Knowledge Boundaries in Complex Innovation  

Science Conference Proceedings (OSTI)

Drug discovery is a complex innovation process in which scientists need to make sense of ambiguous findings and grapple with numerous unpredictable interdependencies over many years of product development. Digitalization has combined with expanding science ... Keywords: organizational processes, organizing for innovation, technology and innovation

Deborah Dougherty; Danielle D. Dunne

2012-09-01T23:59:59.000Z

469

Using Hard Disks For Digital Preservation David S. H. Rosenthal  

E-Print Network (OSTI)

Using Hard Disks For Digital Preservation David S. H. Rosenthal Stanford University Libraries the hard disk holding the copy used for access as a preser- vation medium; the cooperative damage detection system as an example of the techniques needed to use hard disks as a medium for long- term preservation

Baker, Mary G.

470

Digital Library Evaluation by Analysis of User Retrieval Patterns  

Science Conference Proceedings (OSTI)

We propose a methodology to evaluate the impact of a Digital Library's (DL) collection and the characteristics of its user community by an analysis of user retrieval patterns. Patterns of journal and document co-retrievals are reconstructed from DL server ...

Johan Bollen; Somasekhar Vemulapalli; Weining Xu

2002-09-01T23:59:59.000Z

471

MySQL: Lessons Learned on a Digital Library  

Science Conference Proceedings (OSTI)

In recent years, open source relational database products have achieved enterprise-level quality. The Los Alamos National Laboratoryýs Research Library selected the open source MySQL database management system to develop a comprehensive database of scientific ... Keywords: relational databases, database management systems, digital libraries, open systems, MySQL

Mariella Di Giacomo

2005-05-01T23:59:59.000Z

472

Playable character: extending digital games into the real world  

Science Conference Proceedings (OSTI)

This paper describes a series of research probe games developed to investigate how real-world activity could be incorporated into digital game systems. These culminated in the design of our final game, Forest, which was conceived for the San Francisco ... Keywords: design, forest, games, location-based, social games

Jason Linder; Wendy Ju

2012-05-01T23:59:59.000Z

473

Review: Digital image steganography: Survey and analysis of current methods  

Science Conference Proceedings (OSTI)

Steganography is the science that involves communicating secret data in an appropriate multimedia carrier, e.g., image, audio, and video files. It comes under the assumption that if the feature is visible, the point of attack is evident, thus the goal ... Keywords: Adaptive steganography, Digital image steganography, Frequency domain, Security, Spatial domain

Abbas Cheddad; Joan Condell; Kevin Curran; Paul Mc Kevitt

2010-03-01T23:59:59.000Z

474

Analog circuit test based on a digital signature  

Science Conference Proceedings (OSTI)

Production verification of analog circuit specifications is a challenging task requiring expensive test equipment and time consuming procedures. This paper presents a method for low cost on-chip parameter verification based on the analysis of a digital ... Keywords: mixed-signal test, monitoring, nonlinear zone boundary, specification verification

A. Gómez; R. Sanahuja; L. Balado; J. Figueras

2010-03-01T23:59:59.000Z

475

Extending tangible interfaces for education: digital montessori-inspired manipulatives  

Science Conference Proceedings (OSTI)

This paper introduces a new framework for thinking about tangible interfaces in education, with specific focus on abstract problem domains.Manipulatives are physical objects specifically designed to foster learning. We offer a new classification of Manipulatives: ... Keywords: TUI, digital manipulatives, education, simulation, toys

Oren Zuckerman; Saeed Arida; Mitchel Resnick

2005-04-01T23:59:59.000Z

476

A visibility control system for collaborative digital table  

Science Conference Proceedings (OSTI)

We propose a novel display system that presents information with different levels of visibility to multiple users for enhancing collaborative multi-touch on digital tables by controlling visibility with a revolving polarizer. We first describe the system ... Keywords: CSCW, Display system, Entertainment, Public display

Satoshi Sakurai; Yoshifumi Kitamura; Sriram Subramanian; Fumio Kishino

2009-11-01T23:59:59.000Z

477

Creating digital life stories through activity recognition with image filtering  

Science Conference Proceedings (OSTI)

This paper presents two algorithms that enables the MemoryLane system to support persons with mild dementia through creation of digital life stories. The MemoryLane system consists of a Logging Kit that captures context and image data, and a Review Client ... Keywords: activity recognition, image filtering, life logging, life story, memory assistance

Basel Kikhia; Johan E. Bengtsson; Kåre Synnes; Zaheer ul Hussain Sani; Josef Hallberg

2010-06-01T23:59:59.000Z

478

Firm performance impacts of digitally enabled supply chain integration capabilities  

Science Conference Proceedings (OSTI)

Best practice exemplars suggest that digital platforms play a critical role in managing supply chain activities and partnerships that generate performance gains for firms. However, there is limited academic investigation on how and why information technology ... Keywords: IT infrastructure, customer relationships, operational excellence, revenue growth, supply chain integration, supply chain management

Arun Rai; Ravi Patnayakuni; Nainika Seth

2006-06-01T23:59:59.000Z

479

A matricial public key cryptosystem with digital signature  

Science Conference Proceedings (OSTI)

We describe a new public key cryptosystem using block upper triangular matrices with elements in Zp, based on a generalization of the discrete logarithm problem over a finite group. The proposed cryptosystem is very efficient, requiring ... Keywords: DLP, Diffie-Hellman, ElGamal, cryptography, digital signature, finite fields, polynomial matrices, public-key, security

Rafael Alvarez; Francisco-Miguel Martinez; Jose-Francisco Vicent; Antonio Zamora

2008-04-01T23:59:59.000Z

480

High-level synthesis of digital microfluidic biochips  

Science Conference Proceedings (OSTI)

Microfluidic biochips offer a promising platform for massively parallel DNA analysis, automated drug discovery, and real-time biomolecular recognition. Current techniques for full-custom design of droplet-based “digital” biochips do not scale ... Keywords: High-level synthesis, biochips, microfluidics, scheduling, system-on-chip

Fei Su; Krishnendu Chakrabarty

2008-01-01T23:59:59.000Z

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


481

Digital Filter Algorithm Based on Whistle Sound Suppression System Design  

Science Conference Proceedings (OSTI)

System uses the voice codec chip analog voice signals TLV320AIC23 A/D conversion, digital audio is passed to the DSP chip TMS320VC5409 sequence processing, DSP algorithms using FFT and CZT transform algorithm the number of sequences of audio spectrum ... Keywords: Acoustic feedback, FFT transform, CZT transform, IIR filter, TMS320VC5409

Lei Liu; Honggang Li; Xiaochen Hu

2012-08-01T23:59:59.000Z

482

A novel droplet routing algorithm for digital microfluidic biochips  

Science Conference Proceedings (OSTI)

One of the recent areas of research interest is the use of microfluidics for building up biochips, the digital microfluidic biochips (DMFB). This paper deals with a challenging problem related to the design of DMFB. Specifically the design problem considered ... Keywords: biochips, layout, microfluidics, placement and routing

Pranab Roy; Hafizur Rahaman; Parthasarathi Dasgupta

2010-05-01T23:59:59.000Z

483

Token+constraint systems for tangible interaction with digital information  

Science Conference Proceedings (OSTI)

We identify and present a major interaction approach for tangible user interfaces based upon systems of tokens and constraints. In these interfaces, tokens are discrete physical objects which represent digital information. Constraints are confining regions ... Keywords: Tangible interfaces, token+constraint interfaces

Brygg Ullmer; Hiroshi Ishii; Robert J. K. Jacob

2005-03-01T23:59:59.000Z

484

The lean oxidation of iso-octane at elevated pressures  

DOE Green Energy (OSTI)

Both spark-ignition and compression-ignition engines burn large molecular-weight blended fuels, a class to which the primary reference fuels (PRF), n-heptane and iso-octane belong. In this study experiments were performed using iso-octane in a high pressure flow reactor at a temperature of 925 K, at 3, 6 and 9 atm pressure and with a fuel/air equivalence ratio of approximately 0.05. Many hydrocarbon and oxygenated hydrocarbon intermediates were identified and quantified as a function of time. These experimental results provide a strin- gent test of the low temperature chemistry portion of a kinetic model as they emphasise the importance of alkyl radical addition to molecular oxygen and internal H-atom isomerization reactions relative to alkyl radical decomposition reactions. A detailed chemical kinetic mechanism is used to simulate these experiments. We provide comparisons of model predictions with experimentally measured species profiles and describe how each species is formed as predicted by the detailed model.

Chen, J S; Curran, H J; Litzinger, T A

1998-10-30T23:59:59.000Z

485

Evaluation of Incompatibility Between an Electronic Air Ionizer and Digital Clock  

Science Conference Proceedings (OSTI)

This power quality (PQ) case study evaluates the incompatibility between an electronic air ionizer and a digital clock.

2003-12-31T23:59:59.000Z

486

1000 years of the olympic games: treasures of ancient Greece. digital reconstruction at the home of the gods  

Science Conference Proceedings (OSTI)

Keywords: 3D, Zeus, anaglyph, ancient Olympia, digital, digital cultural heritage, heritage, laser scan, panoramic photography, polarised, three dimensions, virtual reconstruction, web, zoomable

Sarah Kenderdine

2001-04-01T23:59:59.000Z

487

Elevated CO2 and plant species diversity interact to slow root decomposition  

Science Conference Proceedings (OSTI)

Changes in plant species diversity can result in synergistic increases in decomposition rates, while elevated atmospheric CO2 can slow the decomposition rates; yet it remains unclear how diversity and changes in atmospheric CO2 may interact to alter root decomposition. To investigate how elevated CO2 interacts with changes in root-litter diversity to alter decomposition rates, we conducted a 120-day laboratory incubation. Roots from three species (Trifolium repens, Lespedeza cuneata, and Festuca pratense) grown under ambient or elevated CO2 were incubated individually or in combination in soils that were exposed to ambient or elevated CO2 for five years. Our experiment resulted in two main findings: (1) Roots from T. repens and L. cuneata, both nitrogen (N) fixers, grown under elevated CO2 treatments had significantly slower decomposition rates than similar roots grown under ambient CO2 treatments; but the decomposition rate of F. pratense roots (a non-N-fixing species) was similar regardless of CO2 treatment. (2) Roots of the three species grown under ambient CO2 and decomposed in combination with each other had faster decomposition rates than when they were decomposed as single species. However, roots of the three species grown under elevated CO2 had similar decomposition rates when they were incubated alone or in combination with other species. These data suggest that if elevated CO2 reduces the root decomposition rate of even a few species in the community, it may slow root decomposition of the entire plant community.

De Graaff, Marie-Anne [ORNL; Schadt, Christopher Warren [ORNL; Rula, Kelly L [ORNL; Six, Johan W U A [University of California, Davis; Schweitzer, Jennifer A [ORNL; Classen, Aimee T [University of Tennessee, Knoxville (UTK)

2011-01-01T23:59:59.000Z

488

Picture the space: three concepts for management and presentation of personal digital photographs  

Science Conference Proceedings (OSTI)

Increasing numbers of personal digital photographs are occupying our computers' hard drives and require more time and thought to be organized. However spare time is limited and the handling of digital photographs has to compete with other leisure activities. ... Keywords: digital photography, interaction design, usability

Claudia Ott; Ralf Hebecker; Sarah Wakes

2012-07-01T23:59:59.000Z

489

A generic XML language for characterising objects to support digital preservation  

Science Conference Proceedings (OSTI)

The dominance of digital objects in today's information landscape has changed the way humankind creates and exchanges information. However, it has also brought an entirely new problem: the longevity of digital objects. Due to the fast changes in technologies, ... Keywords: XML languages, content characterisation, digital preservation, migration, preservation planning

Christoph Becker; Andreas Rauber; Volker Heydegger; Jan Schnasse; Manfred Thaller

2008-03-01T23:59:59.000Z

490

Same same but different: comparing rendering environments for interactive digital objects  

Science Conference Proceedings (OSTI)

Digital cultural heritage in interactive form can take different shapes. It can be either in the form of interactive virtual representations of nondigital objects like buildings or nature, but also as born digital materials like interactive art and video ... Keywords: characterization, digital preservation, emulation, image segmentation, preservation planning, rendering

M. Guttenbrunner; J. Wieners; A. Rauber; M. Thaller

2010-11-01T23:59:59.000Z

491

Legal deposit of digital publications: a review of research and development activity  

Science Conference Proceedings (OSTI)

There is a global trend towards extending legal deposit to include dig ital publications in order to maintain comprehensive national archives. However, including digital publications in legal deposit regulation is not enough to ensure the long-term preservation ... Keywords: digital preservation, digital publications, legal deposit

Adrienne Muir

2001-01-01T23:59:59.000Z

492

Distributed digital processing and closed loop computer control of wastewater treatment  

Science Conference Proceedings (OSTI)

The application of digital computer control to municipal wastewater treatment processes is steadily gaining popularity. Within the next few years this mode of control is expected to become a standard feature of larger wastewater treatment plants. The ... Keywords: Closed loop systems, PID control, computer application, computer control, digital control, direct digital control, ecology, feedback, feedforward, water pollution

Bipin Mishra

1980-01-01T23:59:59.000Z

493

National digital newspaper program: a case study in sharing, linking, and using data  

Science Conference Proceedings (OSTI)

This poster presents a case study describing how the National Digital Newspaper Program's (NDNP) metadata specification and public website, Chronicling America, have been designed to promote a wide range of data sharing. Through use of the website's ... Keywords: application programming interface, digitization, historical newspapers, national digital newspaper program

Nathan Yarasavage; Robin Butterhof; Christopher Ehrman

2012-06-01T23:59:59.000Z

494

Beyond size and search: building contextual mass in digital aggregations for scholarly use  

Science Conference Proceedings (OSTI)

At present there are no established collection development methods for building large-scale digital aggregations. However, to realize the potential of the collective base of digital content and advance scholarship, aggregations must do more than provide ... Keywords: collection evaluation, collection policy, collection-level metadata, digital aggregations, scholarly information use, subject access, subject analysis, thematic research collections

Carole L. Palmer; Oksana L. Zavalina; Katrina Fenlon

2010-10-01T23:59:59.000Z

495

A novel time-based low-power pipeline analog to digital converter  

Science Conference Proceedings (OSTI)

A new power reduction technique for analog-to-digital converters is proposed in this paper. A novel current-mode algorithm which uses time to perform analog-to-digital conversion has been described and a 12 bit 100-ksample/s time-based pipeline analog ... Keywords: Bottom plate sampling, Continues-time comparator, Digital correction, Pipeline ADC

Mohammad Hossein Zarifi; Javad Frounchi; Shahin Farshchi; Jack W. Judy

2010-03-01T23:59:59.000Z

496

When use cases are not useful: data practices, astronomy, and digital libraries  

Science Conference Proceedings (OSTI)

As science becomes more dependent upon digital data, the need for data curation and for data digital libraries becomes more urgent. Questions remain about what researchers consider to be their data, their criteria for selecting and trusting data, and ... Keywords: astronomy, collaboration, data repositories, digital data curation, ethnography, information behavior, science & technology studies, scientific data practices, user-centered design

Laura Wynholds; David S. Fearon, Jr.; Christine L. Borgman; Sharon Traweek

2011-06-01T23:59:59.000Z

497

Best k-digit rational bounds for irrational numbers: Pre- and super-computer era  

Science Conference Proceedings (OSTI)

We present here the best k-digit rational bounds for a given irrational number, where the numerator has k digits. Of the two bounds, either the upper bound or the lower bound, will be the best k-digit rational approximation for the given irrational number. ... Keywords: Error-free application, Irrational numbers, Pre-historic computing, Rational bounds, Supercomputer

S. K. Sen; Ravi P. Agarwal; Raffaella Pavani

2009-04-01T23:59:59.000Z

498

PenLight: combining a mobile projector and a digital pen for dynamic visual overlay  

Science Conference Proceedings (OSTI)

Digital pen systems, originally designed to digitize annotations made on physical paper, are evolving to permit a wider variety of applications. Although the type and quality of pen feedback (e.g., haptic, audio, and visual) have a huge impact on advancing ... Keywords: digital pen input, mobile projector, multi-layer interaction, spatially-aware display

Hyunyoung Song; Tovi Grossman; George Fitzmaurice; François Guimbretiere; Azam Khan; Ramtin Attar; Gordon Kurtenbach

2009-04-01T23:59:59.000Z

499

Towards hiding federated digital identity: stop-dissemination mechanism in content-centric networking  

Science Conference Proceedings (OSTI)

Evolving from a document-centered into a service and data-centered World Wide Web, Web of data, requires a better user's digital identity protection and management. The permanence nature of digital identity entails loss of user's control over distributed ... Keywords: content-centric networking, federated digital identity, identity hiding mechanism., user's identity control

Amine Elabidi; Ghazi Ben Ayed; Sonia Mettali Gammar; Farouk Kamoun

2011-11-01T23:59:59.000Z

500

A Large-Scale, High-Resolution Hydrological Model Parameter Data Set for Climate Change Impact Assessment for the Conterminous US  

SciTech Connect

To extend geographical coverage, refine spatial resolution, and improve modeling efficiency, a computation- and data-intensive effort was conducted to organize a comprehensive hydrologic dataset with post-calibrated model parameters for hydro-climate impact assessment. Several key inputs for hydrologic simulation including meteorologic forcings, soil, land class, vegetation, and elevation were collected from multiple best-available data sources and organized for 2107 hydrologic subbasins (8-digit hydrologic units, HUC8s) in the conterminous United States at refined 1/24 (~4 km) spatial resolution. Using high-performance computing for intensive model calibration, a high-resolution parameter dataset was prepared for the macro-scale Variable Infiltration Capacity (VIC) hydrologic model. The VIC simulation was driven by DAYMET daily meteorological forcing and was calibrated against USGS WaterWatch monthly runoff observations for each HUC8. The results showed that this new parameter dataset may help reasonably simulate runoff at most US HUC8 subbasins. Based on this exhaustive calibration effort, it is now possible to accurately estimate the resources required for further model improvement across the entire conterminous United States. We anticipate that through this hydrologic parameter dataset, the repeated effort of fundamental data processing can be lessened, so that research efforts can emphasize the more challenging task of assessing climate change impacts. The pre-organized model parameter dataset will be provided to interested parties to support further hydro-climate impact assessment.

Oubeidillah, Abdoul A [ORNL] [ORNL; Kao, Shih-Chieh [ORNL] [ORNL; Ashfaq, Moetasim [ORNL] [ORNL; Naz, Bibi S [ORNL] [ORNL; Tootle, Glenn [University of Alabama, Tuscaloosa] [University of Alabama, Tuscaloosa

2014-01-01T23:59:59.000Z