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Note: This page contains sample records for the topic "3-d density model" from the National Library of EnergyBeta (NLEBeta).
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1

3-D Density Model Of Mt Etna Volcano (Southern Italy) | Open Energy  

Open Energy Info (EERE)

3-D Density Model Of Mt Etna Volcano (Southern Italy) 3-D Density Model Of Mt Etna Volcano (Southern Italy) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: 3-D Density Model Of Mt Etna Volcano (Southern Italy) Details Activities (0) Areas (0) Regions (0) Abstract: A detailed density model of Mt. Etna and its surrounding areas has been evaluated using a 3-D inversion of the gravimetric data acquired in the 1980's. Several high-density and low-density bodies are found, penetrating from shallow depths as far down as 12 km bsl. A positive correlation (in terms of location, extent, density, and velocity) is established between several anomalies of the density model and features identified in previously published seismic tomographies. A prominent high-density body extending down to 7 km bsl is recognized in the southern

2

P1-09: Atomic Density Function 3D Modeling of Crystal Growth with ...  

Science Conference Proceedings (OSTI)

P1-04: 3D Microstructural Characterization of Uranium Oxide as a Surrogate Nuclear ... P1-15: Gating System Optimisation Design Study of a Cast Automobile ... P2-27: Characterization of Carbonate Rocks through X-ray Microtomography.

3

3-D capacitance density imaging system  

DOE Patents (OSTI)

A three-dimensional capacitance density imaging of a gasified bed or the like in a containment vessel is achieved using a plurality of electrodes provided circumferentially about the bed in levels and along the bed in channels. The electrodes are individually and selectively excited electrically at each level to produce a plurality of current flux field patterns generated in the bed at each level. The current flux field patterns are suitably sensed and a density pattern of the bed at each level determined. By combining the determined density patterns at each level, a three-dimensional density image of the bed is achieved. 7 figs.

Fasching, G.E.

1988-03-18T23:59:59.000Z

4

3-D Model for Deactivation & Decommissioning | Department of...  

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

3-D Model for Deactivation & Decommissioning 3-D Model for Deactivation & Decommissioning The design and production of 3-D scale models that replicate the highly contaminated...

5

RELAP5-3D Compressor Model  

SciTech Connect

A compressor model has been implemented in the RELAP5-3D© code. The model is similar to that of the existing pump model, and performs the same function on a gas as the pump performs on a single-phase or two-phase fluid. The compressor component consists of an inlet junction and a control volume, and optionally, an outlet junction. This feature permits cascading compressor components in series. The equations describing the physics of the compressor are derived from first principles. These equations are used to obtain the head, the torque, and the energy dissipation. Compressor performance is specified using a map, specific to the design of the machine, in terms of the ratio of outlet-to-inlet total (or stagnation) pressure and adiabatic efficiency as functions of rotational velocity and flow rate. The input quantities are specified in terms of dimensionless variables, which are corrected to stagnation density and stagnation sound speed. A small correction was formulated for the input of efficiency to account for the error introduced by assumption of constant density when integrating the momentum equation. Comparison of the results of steady-state operation of the compressor model to those of the MIT design calculation showed excellent agreement for both pressure ratio and power.

James E. Fisher; Cliff B. Davis; Walter L. Weaver

2005-06-01T23:59:59.000Z

6

3-D hydro + cascade model at RHIC  

E-Print Network (OSTI)

We present a 3-D hydro + cascade model in which viscosity and a realistic freezeout process for the hadronic phase are taken into account. We compare our results to experimental data and discuss the finite state interaction effects on physical observables.

Chiho Nonaka; Steffen A. Bass

2005-10-11T23:59:59.000Z

7

3-D hydro + cascade model at RHIC  

E-Print Network (OSTI)

We present a 3-D hydro + cascade model in which viscosity and a realistic freezeout process for the hadronic phase are taken into account. We compare our results to experimental data and discuss the finite state interaction effects on physical observables.

Nonaka, C; Nonaka, Chiho; Bass, Steffen A.

2006-01-01T23:59:59.000Z

8

3-D Radiative Transfer Modeling of Structured Winds in Massive Hot Stars with Wind3D  

E-Print Network (OSTI)

We develop 3-D models of the structured winds of massive hot stars with the Wind3D radiative transfer (RT) code. We investigate the physical properties of large-scale structures observed in the wind of the B-type supergiant HD 64760 with detailed line profile fits to Discrete Absorption Components (DACs) and rotational modulations observed with IUE in Si IV {\\lambda}1395. We develop parameterized input models Wind3D with large-scale equatorial wind density- and velocity-structures, or so-called `Co-rotating Interaction Regions' (CIRs) and `Rotational Modulation Regions' (RMRs). The parameterized models offer important advantages for high-performance RT calculations over ab-initio hydrodynamic input models. The acceleration of the input model calculations permits us to simulate and investigate a wide variety of physical conditions in the extended winds of massive hot stars. The new modeling method is very flexible for constraining the dynamic and geometric wind properties of RMRs in HD 64760. We compute that t...

Lobel, A; Blomme, R

2010-01-01T23:59:59.000Z

9

3-D Model for Deactivation & Decommissioning  

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

Project & Identifier Project & Identifier Tech Stage: Deployment In-Situ Decommissioning: SR09171 SRS Area Closure Projects: PBS SR-0040 3-D models of the R reactor building and P reactor vessel were delivered to SRS Area Closure Projects Page 1 of 2 Tech Fact Sheet Savannah River Site South Carolina 3-D Model for Deactivation & Decommissioning Challenge Planning for the safe and controlled deactivation and decommissioning (D&D) of highly contaminated nuclear facilities requires that engineers and managers fully understand the work space in which personnel and equipment will operate. It also requires that they effectively communicate safety concerns and work sequences to the personnel who will perform the work. This crucial knowledge is conveyed in

10

3-D hydro + cascade model at RHIC  

E-Print Network (OSTI)

We present a 3-D hydro + cascade model, in which viscosity and a realistic freezeout process for the hadronic phase are taken into account. We compare our results to experimental data and discuss the final state interaction effects on physical observables. 1. FREEZEOUT PROCESS AND VISCOSITY IN HYDRODYNAMICS Hydrodynamic models have been very successful in describing the collective behavior of matter at RHIC, such as single particle spectra and elliptic flow. In particular the strong elliptic flow which, for the first time, reaches the hydrodynamic limit at RHIC, provides us with a new understanding of the nature of the quark-gluon plasma (QGP) created at RHIC as strongly interacting or correlated QGP [ 1]. However there exist a number of experimental observations that contradict ideal hydrodynamic models: transverse momentum spectra above 2 GeV, elliptic flow at large pseudo-rapdities ? and Hanbury Brown- Twiss (HBT) interferometry. These observations suggest that there exist limitations to the application of a simple ideal hydrodynamic model to RHIC physics and that an improvement on an ideal hydrodynamic model is needed in order to obtain a comprehensive and unified description of the data from the point of view of hydrodynamics. In general, hydrodynamic models require initial conditions, an equations of state (EoS)

Chiho Nonakaa A; Steffen A. Bass

2005-01-01T23:59:59.000Z

11

Examination of 1D Solar Cell Model Limitations Using 3D SPICE Modeling: Preprint  

DOE Green Energy (OSTI)

To examine the limitations of one-dimensional (1D) solar cell modeling, 3D SPICE-based modeling is used to examine in detail the validity of the 1D assumptions as a function of sheet resistance for a model cell. The internal voltages and current densities produced by this modeling give additional insight into the differences between the 1D and 3D models.

McMahon, W. E.; Olson, J. M.; Geisz, J. F.; Friedman, D. J.

2012-06-01T23:59:59.000Z

12

3-D Model for Deactivation & Decommissioning | Department of Energy  

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

3-D Model for Deactivation & Decommissioning 3-D Model for Deactivation & Decommissioning 3-D Model for Deactivation & Decommissioning The design and production of 3-D scale models that replicate the highly contaminated structures within the nuclear facility would provide a significant improvement in visualization of the work space, which would give managers and supervisors a more powerful tool for planning and communicating safety issues and work sequences to personnel executing the physical D&D tasks. 3-D Model for Deactivation & Decommissioning More Documents & Publications D&D Toolbox Robotic Deployment of High Resolution Laser Imaging for Characterization D&D and Risk Assessment Tools 3-D Model for Deactivation & Decommissioning Deactivation & Decommissioning Knowledge Management Information Tool (D&D

13

FMI Borehole Geology, Geomechanics and 3D Reservoir Modeling...  

Open Energy Info (EERE)

NA, 2002 DOI Not Provided Check for DOI availability: http:crossref.org Online Internet link for FMI Borehole Geology, Geomechanics and 3D Reservoir Modeling Citation...

14

Assessing the RELAPS-3D Heat Conduction Enclosure Model  

SciTech Connect

Three heat conduction problems that have exact solutions are modeled with RELAP5-3D using the conduction enclosure model. These comparisons are designed to be used in the RELAP5-3D development assessment scheduled to be completed in 2009. It is shown that with proper input choices and adequate model detail the exact solutions can be matched. In addition, this analysis identified an error and the required correction in the cylindrical and spherical heat conductor models in RELAP5-3D which will be corrected in a future version of RELAP5-3D.

McCann, Larry D.

2008-09-30T23:59:59.000Z

15

Development of a 3D atmospheric radiative transfer model  

Science Conference Proceedings (OSTI)

The 3D atmospheric radiative transfer model is established based on MODTRAN4. Moreover, the methods of calculating the ratio of atmospheric transmission, path radiation and single scattering solar radiation are presented. This 3D model is running by ... Keywords: MODTRAN4, atmospheric radiative transfer model, infrared radiation

Zhifeng Lu; Ge Li; Gang Guo; Kedi Huang

2008-05-01T23:59:59.000Z

16

3-D capacitance density imaging of fluidized bed  

DOE Patents (OSTI)

A three-dimensional capacitance density imaging of a gasified bed or the like in a containment vessel is achieved using a plurality of electrodes provided circumferentially about the bed in levels and along the bed in channels. The electrodes are individually and selectively excited electrically at each level to produce a plurality of current flux field patterns generated in the bed at each level. The current flux field patterns are suitably sensed and a density pattern of the bed at each level determined. By combining the determined density patterns at each level, a three-dimensional density image of the bed is achieved.

Fasching, George E. (653 Vista Pl., Morgantown, WV 26505)

1990-01-01T23:59:59.000Z

17

Building information modeling: the Web3D application for AEC  

Science Conference Proceedings (OSTI)

There is currently a dramatic shift in the Architecture, Engineering, and Construction (AEC) industry to embrace Building Information Modeling (BIM) as a tool that can assist in integrating the fragmented industry by eliminating inefficiencies and redundancies, ... Keywords: BIM, IFC, Web3D, X3D, architecture, building information modeling, construction, engineering, visualization

Dace A. Campbell

2007-04-01T23:59:59.000Z

18

3D Modelling of Carbon Allotropes Used in Nanotechnology  

Science Conference Proceedings (OSTI)

Graphene, Carbon nanoribbons, Carbon nanotubes and Fullerene (Buckyball) are allotropes of carbon which are widely used in Nanotechnology research due to their remarkable properties. Electrical and mechanical properties of those allotropes vary with ... Keywords: Graphene, Carbon nanoribbons, Carbon nanotubes, Fullerines, 3D modelling, java3D

M. R. M. Mufthas; C. S. Rupasinghe

2010-05-01T23:59:59.000Z

19

Shape-based retrieval and analysis of 3D models  

Science Conference Proceedings (OSTI)

Large repositories of 3D data are rapidly becoming available in several fields, including mechanical CAD, molecular biology, and computer graphics. As the number of 3D models grows, there is an increasing need for computer algorithms to help people find ...

Thomas Funkhouser; Michael Kazhdan

2004-08-01T23:59:59.000Z

20

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

Note: This page contains sample records for the topic "3-d density 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

3-D Earth model more accurately pinpoints explosions  

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

3-D Earth model more accurately pinpoints explosions 3-D Earth model more accurately pinpoints explosions 3-D Earth model more accurately pinpoints explosions The purpose of this model is to assist the U.S. Air Force and the international Comprehensive Nuclear Test Ban Treaty Organization with more accurately locating all types of explosions. October 25, 2013 A one-dimensional velocity profile with depth plotted within a three-dimensional Earth. The colors are compressional wave velocity in km/s. The rays are examples coming from a pseudo station at the North Pole. This model is used as the starting point to calculate the full SALSA3D velocity model. A one-dimensional velocity profile with depth plotted within a three-dimensional Earth. The colors are compressional wave velocity in km/s. The rays are examples coming from a pseudo station at the North Pole.

22

3-D Earth model more accurately pinpoints explosions  

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

3-D Earth model more accurately pinpoints explosions 3-D Earth model more accurately pinpoints explosions 3-D Earth model more accurately pinpoints explosions The purpose of this model is to assist the U.S. Air Force and the international Comprehensive Nuclear Test Ban Treaty Organization with more accurately locating all types of explosions. October 25, 2013 A one-dimensional velocity profile with depth plotted within a three-dimensional Earth. The colors are compressional wave velocity in km/s. The rays are examples coming from a pseudo station at the North Pole. This model is used as the starting point to calculate the full SALSA3D velocity model. A one-dimensional velocity profile with depth plotted within a three-dimensional Earth. The colors are compressional wave velocity in km/s. The rays are examples coming from a pseudo station at the North Pole.

23

Stack and cell modelling with SOFC3D: a computer program for the 3D simulations of  

E-Print Network (OSTI)

Stack and cell modelling with SOFC3D: a computer program for the 3D simulations of solid oxide fuel, France 1 Introduction SOFC3D is a computer program, which simulates the behaviour of a solid oxide fuel or the channels, the electrical potential \\Phi at any point of the solid part of the SOFC, and the molar fractions

Herbin, Raphaèle

24

STELLOPT Modeling of the 3D Diagnostic Response in ITER  

SciTech Connect

The ITER three dimensional diagnostic response to an n=3 resonant magnetic perturbation is modeled using the STELLOPT code. The in-vessel coils apply a resonant magnetic perturbation (RMP) fi eld which generates a 4 cm edge displacement from axisymmetry as modeled by the VMEC 3D equilibrium code. Forward modeling of flux loop and magnetic probe response with the DIAGNO code indicates up to 20 % changes in measured plasma signals. Simulated LIDAR measurements of electron temperature indicate 2 cm shifts on the low field side of the plasma. This suggests that the ITER diagnostic will be able to diagnose the 3D structure of the equilibria.

Lazerson, Samuel A

2013-05-07T23:59:59.000Z

25

Editing the topology of 3D models by sketching  

Science Conference Proceedings (OSTI)

We present a method for modifying the topology of a 3D model with user control. The heart of our method is a guided topology editing algorithm. Given a source model and a user-provided target shape, the algorithm modifies the source so that the ... Keywords: skeleton, sketching, topology repair

Tao Ju; Qian-Yi Zhou; Shi-Min Hu

2007-08-01T23:59:59.000Z

26

3D atmospheric modeling based on MODTRAN4  

Science Conference Proceedings (OSTI)

All the factors of atmospheric environment that influence the transmission of infrared radiation were analyzed in detail in the paper. Taking horizontally varying atmospheric property into consideration, a 3D model of atmospheric transmission of infrared ... Keywords: MODTRAN4, infrared radiation, model, path radiation, ratio of atmospheric transmission, simulation, single scatter solar radiation

Ge Li; Zhifeng Lu; Gang Guo; Kedi Huang

2008-06-01T23:59:59.000Z

27

Drilling into Complex 3D Models with Gimlenses Cyprien Pindat  

E-Print Network (OSTI)

-Neira et al. 1992]. For instance, Boeing's 777 air- liner was entirely modeled using CAD software into complex 3D models with gimlenses. In Proceedings of the 19th ACM Symposium on Virtual Reality Software and Technology (VRST '13). ACM. 223-230. c ACM, 2013. This is the author's version of the work. It is posted here

Recanati, Catherine

28

3D Hydro + Cascade model at RHIC and LHC  

Science Conference Proceedings (OSTI)

Using the 3D Hydro + UrQMD model which can explain hot and bulk QCD matter created at RHIC successfully, we show a prediction of one particle distributions and flow at LHC. Besides, we discuss the QCD critical point search in heavy ion collisions from point of view of quantitative analyses.

Nonaka, Chiho [Department of Physics, Nagoya University, Nagoya 464-8602 (Japan)

2010-05-12T23:59:59.000Z

29

A 3-D gravity inversion tool based on exploration of model possibilities  

Science Conference Proceedings (OSTI)

A computational tool for the development and implementation of a recently published method of 3-D (three dimensional) inversion for gravity data is presented. This method seeks to determine the geometry of an indefinite number of anomalous bodies with ... Keywords: anomalous density contrast, gravity anomaly, gravity inversion, model exploration, three-dimensional models

Antonio G. Camacho; Fuensanta G. Montesinos; Ricardo Vieira

2002-03-01T23:59:59.000Z

30

3-D HYDRODYNAMIC MODELING IN A GEOSPATIAL FRAMEWORK  

SciTech Connect

3-D hydrodynamic models are used by the Savannah River National Laboratory (SRNL) to simulate the transport of thermal and radionuclide discharges in coastal estuary systems. Development of such models requires accurate bathymetry, coastline, and boundary condition data in conjunction with the ability to rapidly discretize model domains and interpolate the required geospatial data onto the domain. To facilitate rapid and accurate hydrodynamic model development, SRNL has developed a pre- and post-processor application in a geospatial framework to automate the creation of models using existing data. This automated capability allows development of very detailed models to maximize exploitation of available surface water radionuclide sample data and thermal imagery.

Bollinger, J; Alfred Garrett, A; Larry Koffman, L; David Hayes, D

2006-08-24T23:59:59.000Z

31

Center for Energy Efficiency and Renewable Energy at University of Massachusetts 3D Model of Heat Transfer and Fluid3D Model of Heat Transfer and Fluid  

E-Print Network (OSTI)

Center for Energy Efficiency and Renewable Energy at University of Massachusetts 3D Model of Heat for Energy Efficiency and Renewable Energy at University of Massachusetts 3D Model of Heat Transfer and Fluid WindowModeling a 3D Window Future WorkFuture Work #12;Center for Energy Efficiency and Renewable Energy

Massachusetts at Amherst, University of

32

Mining subsidence prediction based on 3D stratigraphic model and visualization  

Science Conference Proceedings (OSTI)

3D phenomenon involved in mining subsidence was Classified, summarized and aggregated, established the hierarchical structure that describing the geologic phenomena and engineering phenomena of stratum structure. Proposed a 3D stratigraphic model that ... Keywords: 3D stratigraphic model, 3D visualization, DEMs-TEN model, mining subsidence prediction

Ruisheng Jia; Yanjun Peng; Hongmei Sun

2011-01-01T23:59:59.000Z

33

Automatic image alignment for 3d environment modeling  

E-Print Network (OSTI)

We describe an approach for automatically registering color images with 3D laser scanned models. We use the chisquare statistic to compare color images to polygonal models texture mapped with acquired laser reflectance values. In complicated scenes we find that the chi-square test is not robust enough to permit an automatic global registration approach. Therefore, we introduce two techniques for obtaining initial pose estimates that correspond to a coarse alignment of the data. The first method is based on rigidly attaching a camera to a laser scanner and the second utilizes object tracking to decouple these imaging devices. The pose estimates serve as an initial guess for our optimization method, which maximizes the chi-square statistic over a local space of transformations in order to automatically determine the proper alignment. 1.

Nathaniel Williams Kok-lim Low

2004-01-01T23:59:59.000Z

34

Coastal zone wind energy. Part I. Potential wind power density fields based on 3-D model simulations of the dominant wind regimes for three east and Gulf coast areas  

DOE Green Energy (OSTI)

The results of applying a numerical model of the atmosphere to the problem of locating areas of maximum wind power are presented. Three US coastal regions, of approximately 10/sup 5/ km/sup 2/ area each, are investigated. For each region the spatial distribution of daily average power density (W m/sup -2/) for the lowest 100 m of the atmosphere is given for the three most prevalent weather regimes. These distributions are then combined to form an estimate of the annual average power density for each region. Comparisons with long-term climatological data at stations within each region show good agreement between model estimated and observed wind power density for two of the three regions studied.

Garstang, M.; Pielke, R.A.; Snow, J.W.

1980-04-01T23:59:59.000Z

35

Crashworthiness analysis using advanced material models in DYNA3D  

DOE Green Energy (OSTI)

As part of an electric vehicle consortium, LLNL and Kaiser Aluminum are conducting experimental and numerical studies on crashworthy aluminum spaceframe designs. They have jointly explored the effect of heat treat on crush behavior and duplicated the experimental behavior with finite-element simulations. The major technical contributions to the state of the art in numerical simulation arise from the development and use of advanced material model descriptions for LLNL`s DYNA3D code. Constitutive model enhancements in both flow and failure have been employed for conventional materials such as low-carbon steels, and also for lighter weight materials such as aluminum and fiber composites being considered for future vehicles. The constitutive model enhancements are developed as extensions from LLNL`s work in anisotropic flow and multiaxial failure modeling. Analysis quality as a function of level of simplification of material behavior and mesh is explored, as well as the penalty in computation cost that must be paid for using more complex models and meshes. The lightweight material modeling technology is being used at the vehicle component level to explore the safety implications of small neighborhood electric vehicles manufactured almost exclusively from these materials.

Logan, R.W.; Burger, M.J.; McMichael, L.D. [Lawrence Livermore National Lab., CA (United States); Parkinson, R.D. [Kaiser Aluminum & Chemical Corp., Pleasanton, CA (United States). Center for Technology

1993-10-22T23:59:59.000Z

36

Efficient 3D building model generation from 2D floor plans  

E-Print Network (OSTI)

3D building models are beneficial to architects, interior designers, and ordinary people in visualizing indoor space in three dimensions. 3D building models appear to be more aesthetic to ordinary people than architectural ...

Kashlev, Dmitry

2008-01-01T23:59:59.000Z

37

Intermittent heating in the solar corona employing a 3D MHD model  

E-Print Network (OSTI)

We investigate the spatial and temporal evolution of the heating of the corona of a cool star such as our Sun in a three-dimensional magneto-hydrodynamic (3D MHD) model. We solve the 3D MHD problem numerically in a box representing part of the (solar) corona. The energy balance includes Spitzer heat conduction along the magnetic field and optically thin radiative losses. The self-consistent heating mechanism is based on the braiding of magnetic field lines rooted in the convective photosphere. Magnetic stress induced by photospheric motions leads to currents in the atmosphere which heat the corona through Ohmic dissipation. While the horizontally averaged quantities, such as heating rate, temperature or density, are relatively constant in time, the simulated corona is highly variable and dynamic, on average reaching temperatures and densities as found in observations. The strongest heating per particle is found in the transition region from the chromosphere to the corona. The heating is concentrated in curren...

Bingert, Sven

2011-01-01T23:59:59.000Z

38

Recovery of 3D Solar Magnetic Field Model Parameter Using Image Structure Matching  

Science Conference Proceedings (OSTI)

An approach to recover a 3D solar magnetic field model parameter using intensity images of the Sun's corona is introduced. The approach is a quantitative approach in which the 3D model parameter is determined via an image structure matching scheme. The ... Keywords: 3D Parameter Recovery, Image-based Modeling, Structure Matching

Jong Kwan Lee; G. Allen Gary

2009-05-01T23:59:59.000Z

39

Reality-based 3D modeling, segmentation and web-based visualization  

Science Conference Proceedings (OSTI)

One of the most significant consequences of the introduction of digital 3D modeling in the Cultural Heritage field is the possibility to use 3D models as highly effective and intuitive means of communication as well as interface to share and visualize ... Keywords: 3D modeling, laser scanning, photogrammetry, segmentation, semantic, web-based visualization

Anna Maria Manferdini; Fabio Remondino

2010-11-01T23:59:59.000Z

40

A User Study Comparing 3D Modeling with Silhouettes and Google SketchUp  

E-Print Network (OSTI)

We describe a user study comparing 3D Modeling with Silhouettes and Google SketchUp. In the user study, ten users were asked to create 3D models of three different objects, using either 3D Modeling with Silhouettes or ...

Igarashi, Takeo

2010-05-05T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

Physically Based Satellite Retrieval of Precipitation Using a 3D Passive Microwave Radiative Transfer Model  

Science Conference Proceedings (OSTI)

A precipitation retrieval algorithm based on the application of a 3D radiative transfer model to a hybrid physical-stochastic 3D cloud model is described. The cloud model uses a statistical rainfall clustering scheme to generate 3D cloud ...

J. L. Haferman; E. N. Anagnostou; D. Tsintikidis; W. F. Krajewski; T. F. Smith

1996-08-01T23:59:59.000Z

42

A global 3D P-velocity model of the Earth's crust and mantle for improved event location : SALSA3D.  

SciTech Connect

To test the hypothesis that high quality 3D Earth models will produce seismic event locations which are more accurate and more precise, we are developing a global 3D P wave velocity model of the Earth's crust and mantle using seismic tomography. In this paper, we present the most recent version of our model, SALSA3D version 1.5, and demonstrate its ability to reduce mislocations for a large set of realizations derived from a carefully chosen set of globally-distributed ground truth events. Our model is derived from the latest version of the Ground Truth (GT) catalog of P and Pn travel time picks assembled by Los Alamos National Laboratory. To prevent over-weighting due to ray path redundancy and to reduce the computational burden, we cluster rays to produce representative rays. Reduction in the total number of ray paths is {approx}50%. The model is represented using the triangular tessellation system described by Ballard et al. (2009), which incorporates variable resolution in both the geographic and radial dimensions. For our starting model, we use a simplified two layer crustal model derived from the Crust 2.0 model over a uniform AK135 mantle. Sufficient damping is used to reduce velocity adjustments so that ray path changes between iterations are small. We obtain proper model smoothness by using progressive grid refinement, refining the grid only around areas with significant velocity changes from the starting model. At each grid refinement level except the last one we limit the number of iterations to prevent convergence thereby preserving aspects of broad features resolved at coarser resolutions. Our approach produces a smooth, multi-resolution model with node density appropriate to both ray coverage and the velocity gradients required by the data. This scheme is computationally expensive, so we use a distributed computing framework based on the Java Parallel Processing Framework, providing us with {approx}400 processors. Resolution of our model is assessed using a variation of the standard checkerboard method. We compare the travel-time prediction and location capabilities of SALSA3D to standard 1D models via location tests on a global event set with GT of 5 km or better. These events generally possess hundreds of Pn and P picks from which we generate different realizations of station distributions, yielding a range of azimuthal coverage and ratios of teleseismic to regional arrivals, with which we test the robustness and quality of relocation. The SALSA3D model reduces mislocation over standard 1D ak135 regardless of Pn to P ratio, with the improvement being most pronounced at higher azimuthal gaps.

Young, Christopher John; Steck, Lee K. (Los Alamos National Laboratory); Phillips, William Scott (Los Alamos National Laboratory); Ballard, Sanford; Chang, Marcus C.; Rowe, Charlotte A. (Los Alamos National Laboratory); Encarnacao, Andre Villanova; Begnaud, Michael A. (Los Alamos National Laboratory); Hipp, James Richard

2010-07-01T23:59:59.000Z

43

Stochastic Modelling and 3D Minimum Variance RecursiveEstimation of Image Sequences  

Science Conference Proceedings (OSTI)

In this paper the 3D minimum variance filtering problem is considered. The proposed spatiotemporal filter is derived according to the assumption that the 3D signal can be modelled by an ensemble of smooth 3D gaussian random fields. The resulting ... Keywords: image processing, optimal filtering, stochastic modelling

L. Jetto

1999-07-01T23:59:59.000Z

44

3D Atmospheric Radiative Transfer for Cloud System-Resolving Models: Forward Modelling and Observations  

SciTech Connect

Utilization of cloud-resolving models and multi-dimensional radiative transfer models to investigate the importance of 3D radiation effects on the numerical simulation of cloud fields and their properties.

Howard Barker; Jason Cole

2012-05-17T23:59:59.000Z

45

3D model retrieval using accurate pose estimation and view-based similarity  

Science Conference Proceedings (OSTI)

In this paper, a novel framework for 3D object retrieval is presented. The paper focuses on the investigation of an accurate 3D model alignment method, which is achieved by combining two intuitive criteria, the plane reflection symmetry and rectilinearity. ... Keywords: 3D object retrieval, alignment, pose estimation

Apostolos Axenopoulos; Georgios Litos; Petros Daras

2011-04-01T23:59:59.000Z

46

3D Hall MHD Modeling of Solar Wind Plasma Spectra  

E-Print Network (OSTI)

We present fully self consistent 3D simulations of compressible Hall MHD plasma that describe spectral features relevant to the solar wind plasma. We find that a $k^{-7/3}$ spectrum sets in for the fluctuations that are smaller than ion gyro radius. We further investigate scale dependent anisotropy led by nonlinear processes relevant to the solar wind plasma. Our work is important particularly in understanding the role of wave and nonlinear cascades in the evolution of the solar wind, structure formation at the largest scales.

Shaikh, Dastgeer

2009-01-01T23:59:59.000Z

47

3D Geological Modelling In Bavaria - State-Of-The-Art At A State...  

Open Energy Info (EERE)

with form History Facebook icon Twitter icon 3D Geological Modelling In Bavaria - State-Of-The-Art At A State Geological Survey Jump to: navigation, search GEOTHERMAL...

48

Development of 3-D Neutronic Kinetic Model and Control for CANDU Reactors.  

E-Print Network (OSTI)

??The development of a three dimensional (3-D) neutronic kinetic modeling process aiming at control system design for CANadian Deuterium Uranium (CANDU) reactors is carried out… (more)

Xia, Lingzhi

2012-01-01T23:59:59.000Z

49

GSIS: A 3D geological multi-body modeling system from netty cross-sections with topology  

Science Conference Proceedings (OSTI)

True 3D geological models are instrumental in addressing practical geology problems. A 3D geological modeling method is a vital module which converts raw data in lower dimensions into 3D bodies. To be geologically practical, the method must take cross-sections ... Keywords: 3D geological modeling, Data consistency, Fault modeling, Geomodeller

Jing Ming; Mao Pan; Honggang Qu; Zhihong Ge

2010-06-01T23:59:59.000Z

50

MT3D: a 3 dimensional magnetotelluric modeling program (user's guide and documentation for Rev. 1)  

DOE Green Energy (OSTI)

MT3D.REV1 is a non-interactive computer program written in FORTRAN to do 3-dimensional magnetotelluric modeling. A 3-D volume integral equation has been adapted to simulate the MT response of a 3D body in the earth. An integro-difference scheme has been incorporated to increase the accuracy. This is a user's guide for MT3D.REV1 on the University of Utah Research Institute's (UURI) PRIME 400 computer operating under PRIMOS IV, Rev. 17.

Nutter, C.; Wannamaker, P.E.

1980-11-01T23:59:59.000Z

51

Three Dimensional (3D) Microstructure Visualization and Modeling ...  

Science Conference Proceedings (OSTI)

Overview of Microstructural Models Applied to Hot Rolling Mill for Long ... Study of Composite Materials Application for Horizontal Axis Wind Turbine Blades.

52

Synthetic benchmark for modeling flow in 3D fractured media  

Science Conference Proceedings (OSTI)

Intensity and localization of flows in fractured media have promoted the development of a large range of different modeling approaches including Discrete Fracture Networks, pipe networks and equivalent continuous media. While benchmarked usually within ... Keywords: Benchmark, Fractured media, Single-phase flow, Stochastic model

Jean-Raynald De Dreuzy; GéRaldine Pichot; Baptiste Poirriez; Jocelyne Erhel

2013-01-01T23:59:59.000Z

53

DisplayObjects: prototyping functional physical interfaces on 3d styrofoam, paper or cardboard models  

Science Conference Proceedings (OSTI)

This paper introduces DisplayObjects, a rapid prototyping workbench that allows functional interfaces to be projected onto real 3D physical prototypes. DisplayObjects uses a Vicon motion capture system to track the location of physical models. 3D software ... Keywords: augmented reality, early prototyping, organic user interfaces, physical user interfaces

Eric Akaoka; Tim Ginn; Roel Vertegaal

2010-01-01T23:59:59.000Z

54

Strength analysis of 3D landing gear model with failure  

Science Conference Proceedings (OSTI)

Dynamic analyses of the landing gear are conducted to provide capabilities to forecast their behavior under hazardous conditions. This kind of investigation with numerical methods implementation is much easier and less expensive than stand tests. The ... Keywords: FE modelling, drop test simulation, landing gear, possible flaw

Wieslaw Krason; Jerzy Malachowski

2008-09-01T23:59:59.000Z

55

KENO3D Visualization Tool for KENO V.a and KENO-VI Geometry Models  

SciTech Connect

Criticality safety analyses often require detailed modeling of complex geometries. Effective visualization tools can enhance checking the accuracy of these models. This report describes the KENO3D visualization tool developed at the Oak Ridge National Laboratory (ORNL) to provide visualization of KENO V.a and KENO-VI criticality safety models. The development of KENO3D is part of the current efforts to enhance the SCALE (Standardized Computer Analyses for Licensing Evaluations) computer software system.

Horwedel, J.E.; Bowman, S.M.

2000-06-01T23:59:59.000Z

56

Constructing a GIS-based 3D urban model using LiDAR and aerial photographs  

E-Print Network (OSTI)

Due to the increasing availability of high-resolution remotely sensed imagery and detailed terrain surface elevation models, urban planners and municipal managers can now model and visualize the urban space in three dimensions. The traditional approach to the representation of urban space is 2D planimetric maps with building footprints, facilities and road networks. Recently, a number of methods have been developed to represent true 3D urban models. Those include panoramic imaging, Virtual Reality Modeling Language (VRML), and Computer-aided Design (CAD). These methods focus on aesthetic representation, but they do not have sufficient spatial query and analytical capabilities. This research evaluates the conventional approaches to 3D urban models, and identifies their advantages and limitations; GIS functionalities have been combined with 3D urban visualization techniques to develop a GIS-based urban modeling method; The algorithms and techniques have been explored to derive urban objects and their attributes from airborne LiDAR and high-resolution imagery for constructing and visualizing 3D urban models; and 3D urban models for the Texas A&M University (TAMU) campus and downtown Houston have been implemented using the algorithms and techniques developed in this research. By adding close-range camera images and highresolution aerial photographs as the texture of urban objects, effect of photorealism visualization has been achieved for walk-through and fly-through animations. The Texas A&M University campus model and the downtown Houston model have been implemented to offer proof-of-concept, namely, to demonstrate the advantages of the GIS-based approach. These two prototype applications show that the GIS-based 3D urban modeling method, by coupling ArcGIS and MultiGen-Paradigm Site Builder 3D software, can realize the desired functionalities in georeferencing, geographical measurements, spatial query, spatial analysis, and numerical modeling in 3D visual environment.

Lin, Wei-Ming

2004-12-01T23:59:59.000Z

57

Synergia: an accelerator modeling tool with 3-D space charge  

SciTech Connect

High precision modeling of space-charge effects, together with accurate treatment of single-particle dynamics, is essential for designing future accelerators as well as optimizing the performance of existing machines. We describe Synergia, a high-fidelity parallel beam dynamics simulation package with fully three dimensional space-charge capabilities and a higher order optics implementation. We describe the computational techniques, the advanced human interface, and the parallel performance obtained using large numbers of macroparticles. We also perform code benchmarks comparing to semi-analytic results and other codes. Finally, we present initial results on particle tune spread, beam halo creation, and emittance growth in the Fermilab booster accelerator.

Amundson, James F.; Spentzouris, P.; /Fermilab; Qiang, J.; Ryne, R.; /LBL, Berkeley

2004-07-01T23:59:59.000Z

58

A 3-D multiband closure for radiation and neutron transfer moment models  

Science Conference Proceedings (OSTI)

We derive a 3D multi-band moment model and its associated closure for radiation and neutron transfer. The new closure is analytical and nonlinear but very simple. Its derivation is based on the maximum entropy closure and assumes a Wien shape for the ... Keywords: Maximum entropy closure, Moment models, Multi-band models, Multi-bin models, Neutron transfer, ODF, Radiative transfer

J. -F. Ripoll; A. A. Wray

2008-02-01T23:59:59.000Z

59

A real-time emergency response workstation using a 3-D numerical model initialized with sodar  

Science Conference Proceedings (OSTI)

Many emergency response dispersion modeling systems provide simple Gaussian models driven by single meteorological tower inputs to estimate the downwind consequences from accidental spills or stack releases. Complex meteorological or terrain settings demand more sophisticated resolution of the three-dimensional structure of the atmosphere to reliably calculate plume dispersion. Mountain valleys and sea breeze flows are two common examples of such settings. To address these complexities, the authors have implemented the three-dimensional diagnostic MATHEW mass-adjusted wind field and ADPIC particle-in-cell dispersion models on a workstation for use in real-time emergency response modeling. MATHEW/ADPIC have shown their utility in a variety of complex settings over the last 15 years within the Department of Energy`s Atmospheric Release Advisory Capability (ARAC) project. The models are initialized using an array of surface wind measurements from meteorological towers coupled with vertical profiles from an acoustic sounder (sodar). The workstation automatically acquires the meteorological data every 15 minutes. A source term is generated using either defaults or a real-time stack monitor. Model outputs include contoured isopleths displayed on site geography or plume densities shown over 3-D color shaded terrain. The models are automatically updated every 15 minutes to provide the emergency response manager with a continuous display of potentially hazardous ground-level conditions if an actual release were to occur. Model run time is typically less than 2 minutes on 6 megaflop ({approximately}30 MIPS) workstations. Data acquisition, limited by dial-up modem communications, requires 3 to 5 minutes.

Lawver, B.S.; Sullivan, T.J. [Lawrence Livermore National Lab., CA (US); Baskett, R.L. [EG& G Energy Measurements, Inc., Pleasanton, CA (US)

1993-01-28T23:59:59.000Z

60

3D Geological Modelling In Bavaria - State-Of-The-Art At A State Geological  

Open Energy Info (EERE)

D Geological Modelling In Bavaria - State-Of-The-Art At A State Geological D Geological Modelling In Bavaria - State-Of-The-Art At A State Geological Survey Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: 3D Geological Modelling In Bavaria - State-Of-The-Art At A State Geological Survey Details Activities (0) Areas (0) Regions (0) Abstract: Many Geological Survey Organisations (GSOs) are using 3D modelling software technology for a vast variety of applications. Initially many 3D tools were designed for the exploitation of digital seismic mass data existing in hydrocarbon exploration industry. Accordingly, GSOs have to adapt available software and to modify it to their special requirements, defining their own best practice. The Geological Survey of the Bavarian Environment Agency has developed procedures and workflows for a variety of

Note: This page contains sample records for the topic "3-d density 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

RELAP5-3D Code Includes Athena Features and Models  

DOE Green Energy (OSTI)

Version 2.3 of the RELAP5-3D computer program includes all features and models previously available only in the ATHENA version of the code. These include the addition of new working fluids (i.e., ammonia, blood, carbon dioxide, glycerol, helium, hydrogen, lead-bismuth, lithium, lithium-lead, nitrogen, potassium, sodium, and sodium-potassium) and a magnetohydrodynamic model that expands the capability of the code to model many more thermal-hydraulic systems. In addition to the new working fluids along with the standard working fluid water, one or more noncondensable gases (e.g., air, argon, carbon dioxide, carbon monoxide, helium, hydrogen, krypton, nitrogen, oxygen, sf6, xenon) can be specified as part of the vapor/gas phase of the working fluid. These noncondensable gases were in previous versions of RELAP5- 3D. Recently four molten salts have been added as working fluids to RELAP5-3D Version 2.4, which has had limited release. These molten salts will be in RELAP5-3D Version 2.5, which will have a general release like RELAP5-3D Version 2.3. Applications that use these new features and models are discussed in this paper.

Richard A. Riemke; Cliff B. Davis; Richard R. Schultz

2006-07-01T23:59:59.000Z

62

Oxygen spectral line synthesis: 3D non-LTE with CO5BOLD hydrodynamical model atmospheres  

E-Print Network (OSTI)

In this work we present first results of our current project aimed at combining the 3D hydrodynamical stellar atmosphere approach with non-LTE (NLTE) spectral line synthesis for a number of key chemical species. We carried out a full 3D-NLTE spectrum synthesis of the oxygen IR 777 nm triplet, using a modified and improved version of our NLTE3D package to calculate departure coefficients for the atomic levels of oxygen in a CO5BOLD 3D hydrodynamical solar model atmosphere. Spectral line synthesis was subsequently performed with the Linfor 3D code. In agreement with previous studies, we find that the lines of the oxygen triplet produce deeper cores under NLTE conditions, due to the diminished line source function in the line forming region. This means that the solar oxygen IR 777 nm lines should be stronger in NLTE, leading to negative 3D NLTE-LTE abundance corrections. Qualitatively this result would support previous claims for a relatively low solar oxygen abundance. Finally, we outline several further steps ...

Prakapavicius, D; Kucinskas, A; Ludwig, H -G; Freytag, B; Caffau, E; Cayrel, R

2013-01-01T23:59:59.000Z

63

Time domain 3D finite element modelling of train-induced vibration at high speed  

Science Conference Proceedings (OSTI)

The purpose of this paper is to investigate a 3D finite element (FE) coupled train-track model for the numerical modelling of the ground induced vibration due to the passage of a single high speed train locomotive. The track components such as the sleepers, ... Keywords: Finite elements, Ground vibration, High-speed, Mach cone, Railways

A. El Kacimi; P. K. Woodward; O. Laghrouche; G. Medero

2013-03-01T23:59:59.000Z

64

KIVA: a comprehensive model for 2D and 3D engine simulations  

DOE Green Energy (OSTI)

This paper summarizes a comprehensive numerical model that represents the spray dynamics, fluid flow, species transport, mixing, chemical reactions, and accompanying heat release that occur inside the cylinder of an internal combustion engine. The model is embodied in the KIVA computer code. The code calculates both two-dimensional (2D) and three-dimensional (3D) situations. It is an outgrowth of the earlier 2D CONCHAS-SPRAY computer program. Sample numerical calculations are presented to indicate the level of detail that is available from these simulations. These calculations are for a direct injection stratified charge engine with swirl. Both a 2D and a 3D example are shown.

Amsden, A.A.; Butler, T.D.; O'Rourke, P.J.; Ramshaw, J.D.

1985-01-01T23:59:59.000Z

65

A Shell/3D Modeling Technique for the Analysis of Delaminated Composite Laminates  

E-Print Network (OSTI)

A shell/3D modeling technique developed which local three-dimensional solid finite element model used only immediate vicinity delamination front. The goal was combine the accuracy the three-dimensional solution with the computational efficiency plate shell finite element model. Multi-point constraints provided kinematically compatible interface between local three-dimensional model global structural model which has been meshed with plate shell finite elements. Double Cantilever Beam (DCB), Notched Flexure (ENF), Single Bending (SLB) specimens were modeled using shell/3D technique study feasibility pure mode (DCB), mode (ENF) mixed mode I/II (SLB) cases. Mixed mode strain energy release rate distributions were computed across the width specimens using virtual crack closure technique. Specimens a unidirectional layup and with multidirectional layup where delamination located between two non-zero degree plies were simulated. For a local three-dimensional model, extending minimum about thr...

Ronald Krueger; T. Kevin O' Brien

2001-01-01T23:59:59.000Z

66

3D modeling using geognostic data: The case of the low valley of Foglia river (Italy)  

Science Conference Proceedings (OSTI)

In specific geological contexts, such as alluvial environments, the lithology is highly heterogeneous and laterally variable. As a result, a large number of lithological data are collected (generally random and under sampled) for stratigraphic reconstruction. ... Keywords: 3D geological modeling, Data management workflow, GIS, Geostatistics, Multi-source data validation

G. Gallerini; M. De Donatis

2009-01-01T23:59:59.000Z

67

Recovery of Soft Tissue Object Deformation from 3D Image Sequences Using Biomechanical Models  

Science Conference Proceedings (OSTI)

The estimation of soft tissue deformation from 3D image sequences is an important problem in a number of fields such as diagnosis of heart disease and image guided surgery. In this paper we describe a methodology for using biomechanical material models, ...

Xenophon Papademetris; Pengcheng Shi; Donald P. Dione; Albert J. Sinusas; R. Todd Constable; James S. Duncan

1999-06-01T23:59:59.000Z

68

Three-dimensional Thermal and Airflow (3D-TAF) Model of a Dome...  

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

Three-dimensional Thermal and Airflow (3D-TAF) Model of a Dome-covered House in Canada Speaker(s): Yaolin Lin Date: October 6, 2009 - 12:00pm Location: 90-3122 A dome-covered house...

69

3D/4D facial expression analysis: An advanced annotated face model approach  

Science Conference Proceedings (OSTI)

Facial expression analysis has interested many researchers in the past decade due to its potential applications in various fields such as human-computer interaction, psychological studies, and facial animation. Three-dimensional facial data has been ... Keywords: 3D face models, 4D face videos, Expression recognition, Mesh registration

Tianhong Fang; Xi Zhao; Omar Ocegueda; Shishir K. Shah; Ioannis A. Kakadiaris

2012-10-01T23:59:59.000Z

70

The quasi-perspective model: Geometric properties and 3D reconstruction  

Science Conference Proceedings (OSTI)

The paper investigates geometric properties of quasi-perspective projection model in one and two-view geometry. The main results are as follows. (i) Quasi-perspective projection matrix has nine degrees of freedom (DOF), and the parallelism along X and ... Keywords: 3D reconstruction, Essential matrix, Fundamental matrix, Homography, Projective geometry, Quasi-perspective projection

Guanghui Wang; Q. M. Jonathan Wu

2010-05-01T23:59:59.000Z

71

Three-dimensional Thermal and Airflow (3D-TAF) Model of a Dome-covered  

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

Three-dimensional Thermal and Airflow (3D-TAF) Model of a Dome-covered Three-dimensional Thermal and Airflow (3D-TAF) Model of a Dome-covered House in Canada Speaker(s): Yaolin Lin Date: October 6, 2009 - 12:00pm Location: 90-3122 A dome-covered house is an example of sustainable design that draws from biological forms in nature. A three-dimensional thermal and air flow (3D-TAF) model was developed to estimate the energy needs of a dome-covered house. This model has two components: a thermal model to calculate the temperature; and an air flow model to find the velocities, which are needed to estimate the surface convection. The two models are solved iteratively at every time step until they converge. I will present the numerical methods for solving the mathematical models, and compared the results with other simulated and experimental results from similar structures. I will

72

ShrinkWrap: 3D model abstraction for remote sensing simulation  

SciTech Connect

Remote sensing simulations often require the use of 3D models of objects of interest. There are a multitude of these models available from various commercial sources. There are image processing, computational, database storage, and . data access advantages to having a regularized, encapsulating, triangular mesh representing the surface of a 3D object model. However, this is usually not how these models are stored. They can have too much detail in some areas, and not enough detail in others. They can have a mix of planar geometric primitives (triangles, quadrilaterals, n-sided polygons) representing not only the surface of the model, but also interior features. And the exterior mesh is usually not regularized nor encapsulating. This paper presents a method called SHRlNKWRAP which can be used to process 3D object models to achieve output models having the aforementioned desirable traits. The method works by collapsing an encapsulating sphere, which has a regularized triangular mesh on its surface, onto the surface of the model. A GUI has been developed to make it easy to leverage this capability. The SHRlNKWRAP processing chain and use of the GUI are described and illustrated.

Pope, Paul A [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

73

Low dose and bystander responses in a 3-D human skin model  

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

and bystander responses in a 3-D human skin model and bystander responses in a 3-D human skin model Sally A. Amundson Columbia University Medical Center Abstract Significant structural abnormalities develop within several days of exposure of the 3-dimensional normal human skin tissue model EPI-200 (MatTek) to high or low doses of low LET radiation. Disruption of the basal layer occurs following high radiation doses, and premature cornification is evident after both high and low dose exposures. In bystander tissue that is near irradiated portions of the tissue, but is not itself irradiated, we also observe premature cornification, increased apoptosis and micronucleus formation. Changes in global gene expression also occur in both directly irradiated and bystander EPI-200 tissue. Although the unfolding over time

74

Low dose and bystander responses in a 3-D human skin model  

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

and bystander responses in a 3-D human skin model. and bystander responses in a 3-D human skin model. Sally A. Amundson and Alexandre Mezentsev Columbia University Medical Center, Center for Radiological Research, New York, NY 10032 Significant structural abnormalities develop within several days of exposure of the 3-dimensional normal human skin tissue model EPI-200 (MatTek) to high or low doses of low LET radiation. Disruption of the basal layer occurs following high radiation doses, and premature cornification is evident after both high and low dose exposures. In bystander tissue that is near irradiated portions of the tissue, but is not itself irradiated, we also observe premature cornification, increased apoptosis and micronucleus formation. Changes in global gene expression also occur

75

Nanoflare statistics in an active region 3D MHD coronal model  

E-Print Network (OSTI)

Context. We investigate the statistics of the spatial and temporal distribution of the coronal heating in a three-dimensional magneto- hydrodynamical (3D MHD) model. The model describes the temporal evolution of the corona above an observed active region. The model is driven by photospheric granular motions which braid the magnetic field lines. This induces currents and their dissipation heats the plasma. We evaluate the transient heating as subsequent heating events and analyze their statistics. The results are then interpreted in the context of observed flare statistics and coronal heating mechanisms. Methods. To conduct the numerical experiment we use a high order finite difference code which solves the partial differential equations for the conservation of mass, the momentum and energy balance, and the induction equation. The energy balance includes the Spitzer heat conduction and the optical thin radiative loss in the corona. Results. The temporal and spatial distribution of the Ohmic heating in the 3D M...

Bingert, Sven

2012-01-01T23:59:59.000Z

76

The Evaluation of Steam Generator Level Measurement Model for OPR1000 Using RETRAN-3D  

Science Conference Proceedings (OSTI)

Steam generator level measurement is important factor for plant transient analyses using best estimate thermal hydraulic computer codes since the value of steam generator level is used for steam generator level control system and plant protection system. Because steam generator is in the saturation condition which includes steam and liquid together and is the place that heat exchange occurs from primary side to secondary side, computer codes are hard to calculate steam generator level realistically without appropriate level measurement model. In this paper, we prepare the steam generator models using RETRAN-3D that include geometry models, full range feedwater control system and five types of steam generator level measurement model. Five types of steam generator level measurement model consist of level measurement model using elevation difference in downcomer, 1D level measurement model using fluid mass, 1D level measurement model using fluid volume, 2D level measurement model using power and fluid mass, and 2D level measurement model using power and fluid volume. And we perform the evaluation of the capability of each steam generator level measurement model by simulating the real plant transient condition, the title is 'Reactor Trip by The Failure of The Deaerator Level Control Card of Ulchin Unit 3'. The comparison results between real plant data and RETRAN-3D analyses for each steam generator level measurement model show that 2D level measurement model using power and fluid mass or fluid volume has more realistic prediction capability compared with other level measurement models. (authors)

Doo Yong Lee; Soon Joon Hong; Byung Chul Lee [FNC Technology Co., SNU Research Park Innovation Center 516, San4-2, Bongchun-7 dong, Kwanak-Gu, Seoul (Korea, Republic of); Heok Soon Lim [KHNP Nuclear Environment Technology Institute, Munji-dong 103-16, Yusung-Gu, Daejeon (Korea, Republic of)

2006-07-01T23:59:59.000Z

77

A Shell/3d Modeling Technique For Delaminations In Composite Laminates  

E-Print Network (OSTI)

A shell/3D modeling technique was developed for which a local solid finite element model is used only in the immediate vicinity of the delamination front. The goal was to combine the accuracy of the full three-dimensional solution with the computational efficiency of a plate or shell finite element model. Multi-point constraints provide a kinematically compatible interface between the local 3D model and the global structural model which has been meshed with plate or shell finite elements. For simple double cantilever beam (DCB), end notched flexure (ENF), and single leg bending (SLB) specimens, mixed mode energy release rate distributions were computed across the width from nonlinear finite element analyses using the virtual crack closure technique. The analyses served to test the accuracy of the shell/3D technique for the pure mode I case (DCB), mode II case (ENF) and a mixed mode I/II case (SLB). Specimens with a unidirectional layup where the delamination is located between two 0° pl...

Ronald Krueger

1999-01-01T23:59:59.000Z

78

TRANSL8GDECIM8. Data Translation and Filtering for Large 3D Triangle Mesh Models  

SciTech Connect

The TRANSL8GDECIM8 system consists of two programs: TRANSL8G and DECIM8. The TRANSL8G program facilitates the interchange, topology generation, error checking, and enhancement of large 3D triangle meshes. Such data is frequently used to represent conceptual designs, scientific visualization volume modeling, or discrete sample data. Interchange is provided between several popular commercial and defacto standard geometry formats. Error checking is included to identify duplicate and zero area triangles. Model enhancement features include common vertex joining, consistent triangle vertex ordering, vertex normal vector averaging, and triangle strip generation. Many of the traditional O(n squared) algorithms required to provide the above features have been recast and are O(n) which support large mesh sizes. The DECIM8 program is based on a data filter algorithm that significantly reduces the number of triangles required to represent three dimensional (3D) models of geometry, scientific visualization results, and discretely sampled data. The algorithm uses a combined incremental and iterative strategy. It eliminates local patches of triangles whose geometries are not appreciably different and replaces them with fewer larger triangles. The algorithm has been used to reduce triangles in large conceptual design models to facilitate virtual walk throughs and to enable interactive viewing of large 3D iso-surface volume visualizations.

Janucik, F.X.; Ross, D.M. [Knolls Atomic Power Lab., Schenectady, NY (United States)

1993-09-01T23:59:59.000Z

79

P3-17: Modeling 3D Grain Coarsening Based on Tomography Data  

Science Conference Proceedings (OSTI)

P2-03: 3D Characterization of High Burn-up MOX Fuel · P2-04: 3D Identification of Inclusions in NiTi Alloy after Electropolishing · P2-05: Advances in 3D Imaging  ...

80

Radial electric field 3D modeling for wire arrays driving dynamic hohlraums on Z.  

SciTech Connect

The anode-cathode structure of the Z-machine wire array results in a higher negative radial electric field (Er) on the wires near the cathode relative to the anode. The magnitude of this field has been shown to anti-correlate with the axial radiation top/bottom symmetry in the DH (Dynamic Hohlraum). Using 3D modeling, the structure of this field is revealed for different wire-array configurations and for progressive mechanical alterations, providing insight for minimizing the negative Er on the wire array in the anode-to-cathode region of the DH. Also, the 3D model is compared to Sasorov's approximation, which describes Er at the surface of the wire in terms of wire-array parameters.

Mock, Raymond Cecil

2007-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

3D Modeling of Indoor Environments for a Robotic Security Guard  

E-Print Network (OSTI)

Autonomous mobile robots will play a major role in future security and surveillance tasks for large scale environments such as shopping malls, airports, hospitals and museums. Robotic security guards will autonomously survey such environments, unless a remote human operator takes over control. In this context a 3D model can convey much more useful information than the typical 2D maps used in many robotic applications today, both for visualization of information and as human machine interface for remote control.

Peter Biber; Sven Fleck; Tom Duckett

2005-01-01T23:59:59.000Z

82

Development of a 3D GIS database model for geotechnical analysis incorporating geostatistics.  

E-Print Network (OSTI)

??The application of 3D GIS and geostatistical tools in geotechnical fields enables geotechnical engineers to think spatially and make decision wisely. To support the 3D… (more)

Gao, Shan.

2010-01-01T23:59:59.000Z

83

Reactive Flow Modeling of Liquid Explosives via ALE3D/Cheetah Simulations  

SciTech Connect

We carried out reactive flow simulations of liquid explosives such as nitromethane using the hydrodynamic code ALE3D coupled with equations of state and reaction kinetics modeled by the thermochemical code Cheetah. The simulation set-up was chosen to mimic cylinder experiments. For pure unconfined nitromethane we find that the failure diameter and detonation velocity dependence on charge diameter are in agreement with available experimental results. Such simulations are likely to be useful for determining detonability and failure behavior for a wide range of experimental conditions and explosive compounds.

Kuo, I W; Bastea, S; Fried, L E

2010-03-10T23:59:59.000Z

84

Sketch2Scene: sketch-based co-retrieval and co-placement of 3D models  

Science Conference Proceedings (OSTI)

This work presents Sketch2Scene, a framework that automatically turns a freehand sketch drawing inferring multiple scene objects to semantically valid, well arranged scenes of 3D models. Unlike the existing works on sketch-based search and composition ... Keywords: 3D scenes, co-retrieval, sketch based retrieval

Kun Xu; Kang Chen; Hongbo Fu; Wei-Lun Sun; Shi-Min Hu

2013-07-01T23:59:59.000Z

85

From Microscales to Macroscales in 3D: Selfconsistent Equation of State for Supernova and Neutron Star Models  

E-Print Network (OSTI)

First results from a fully self-consistent, temperature-dependent equation of state that spans the whole density range of neutron stars and supernova cores are presented. The equation of state (EoS) is calculated using a mean-field Hartree-Fock method in three dimensions (3D). The nuclear interaction is represented by the phenomenological Skyrme model in this work, but the EoS can be obtained in our framework for any suitable form of the nucleon-nucleon effective interaction. The scheme we employ naturally allows effects such as (i) neutron drip, which results in an external neutron gas, (ii) the variety of exotic nuclear shapes expected for extremely neutron heavy nuclei, and (iii) the subsequent dissolution of these nuclei into nuclear matter. In this way, the equation of state is calculated across phase transitions without recourse to interpolation techniques between density regimes described by different physical models. EoS tables are calculated in the wide range of densities, temperature and proton/neut...

Newton, W G; Mezzacappa, A

2006-01-01T23:59:59.000Z

86

From Microscales to Macroscales in 3D: Selfconsistent Equation of State for Supernova and Neutron Star Models  

E-Print Network (OSTI)

First results from a fully self-consistent, temperature-dependent equation of state that spans the whole density range of neutron stars and supernova cores are presented. The equation of state (EoS) is calculated using a mean-field Hartree-Fock method in three dimensions (3D). The nuclear interaction is represented by the phenomenological Skyrme model in this work, but the EoS can be obtained in our framework for any suitable form of the nucleon-nucleon effective interaction. The scheme we employ naturally allows effects such as (i) neutron drip, which results in an external neutron gas, (ii) the variety of exotic nuclear shapes expected for extremely neutron heavy nuclei, and (iii) the subsequent dissolution of these nuclei into nuclear matter. In this way, the equation of state is calculated across phase transitions without recourse to interpolation techniques between density regimes described by different physical models. EoS tables are calculated in the wide range of densities, temperature and proton/neutron ratios on the ORNL NCCS XT3, using up to 2000 processors simultaneously.

W. G. Newton; J. R. Stone; A. Mezzacappa

2007-08-23T23:59:59.000Z

87

Ideas and methods for modeling 3D human figures: the principal algorithms used by MakeHuman and their implementation in a new approach to parametric modeling  

Science Conference Proceedings (OSTI)

This paper briefly presents the basic algorithms used by MakeHuman and their application in a new context from the point of view of the relationship between artist and computer. The problem we posed is the development of a valid tool specifically designed ... Keywords: 3D human, 3d model, 3d modelling, ACM proceedings

Manuel Bastioni; Simone Re; Shakti Misra

2008-01-01T23:59:59.000Z

88

Hydraulic Fracture Optimization with a Pseudo-3D Model in Multi-layered Lithology  

E-Print Network (OSTI)

Hydraulic Fracturing is a technique to accelerate production and enhance ultimate recovery of oil and gas while fracture geometry is an important aspect in hydraulic fracturing design and optimization. Systematic design procedures are available based on the so-called two-dimensional models (2D) focus on the optimization of fracture length and width, assuming one can estimate a value for fracture height, while so-called pseudo three dimensional (p-3D) models suitable for multi-layered reservoirs aim to maximize well production by optimizing fracture geometry, including fracture height, half-length and width at the end of the stimulation treatment. The proposed p-3D approach to design integrates four parts: 1) containment layers discretization to allow for a range of plausible fracture heights, 2) the Unified Fracture Design (UFD) model to calculate the fracture half-length and width, 3) the PKN or KGD models to predict hydraulic fracture geometry and the associated net pressure and other treatment parameters, and, finally, 4) Linear Elastic Fracture Mechanics (LEFM) to calculate fracture height. The aim is to find convergence of fracture height and net pressure. Net pressure distribution plays an important role when the fracture is propagating in the reservoir. In multi-layered reservoirs, the net pressure of each layer varies as a result of different rock properties. This study considers the contributions of all layers to the stress intensity factor at the fracture tips to find the final equilibrium height defined by the condition where the fracture toughness equals the calculated stress intensity factor based on LEFM. Other than maximizing production, another obvious application of this research is to prevent the fracture from propagating into unintended layers (i.e. gas cap and/or aquifer). Therefore, this study can aid fracture design by pointing out: (1) Treating pressure needed to optimize fracture geometry, (2) The containment top and bottom layers of a multi-layered reservoir, (3) The upwards and downwards growth of the fracture tip from the crack center.

Yang, Mei

2011-08-01T23:59:59.000Z

89

3D Modeling of Coupled Rock Deformation and Thermo-Poro-Mechanical Processes in Fractures  

E-Print Network (OSTI)

Problems involving coupled thermo-poro-chemo-mechanical processes are of great importance in geothermal and petroleum reservoir systems. In particular, economic power production from enhanced geothermal systems, effective water-flooding of petroleum reservoirs, and stimulation of gas shale reservoirs are significantly influenced by coupled processes. During such procedures, stress state in the reservoir is changed due to variation in pore fluid pressure and temperature. This can cause deformation and failure of weak planes of the formation with creation of new fractures, which impacts reservoir response. Incorporation of geomechanical factor into engineering analyses using fully coupled geomechanics-reservoir flow modeling exhibits computational challenges and numerical difficulties. In this study, we develop and apply efficient numerical models to solve 3D injection/extraction geomechanics problems formulated within the framework of thermo-poro-mechanical theory with reactive flow. The models rely on combining Displacement Discontinuity (DD) Boundary Element Method (BEM) and Finite Element Method (FEM) to solve the governing equations of thermo-poro-mechanical processes involving fracture/reservoir matrix. The integration of BEM and FEM is accomplished through direct and iterative procedures. In each case, the numerical algorithms are tested against a series of analytical solutions. 3D study of fluid injection and extraction into the geothermal reservoir illustrates that thermo-poro-mechanical processes change fracture aperture (fracture conductivity) significantly and influence the fluid flow. Simulations that consider joint stiffness heterogeneity show development of non-uniform flow paths within the crack. Undersaturated fluid injection causes large silica mass dissolution and increases fracture aperture while supersaturated fluid causes mineral precipitation and closes fracture aperture. Results show that for common reservoir and injection conditions, the impact of fully developed thermoelastic effect on fracture aperture tend to be greater compare to that of poroelastic effect. Poroelastic study of hydraulic fracturing demonstrates that large pore pressure increase especially during multiple hydraulic fracture creation causes effective tensile stress at the fracture surface and shear failure around the main fracture. Finally, a hybrid BEFEM model is developed to analyze stress redistribution in the overburden and within the reservoir during fluid injection and production. Numerical results show that fluid injection leads to reservoir dilation and induces vertical deformation, particularly near the injection well. However, fluid withdrawal causes reservoir to compact. The Mandel-Cryer effect is also successfully captured in numerical simulations, i.e., pore pressure increase/decrease is non-monotonic with a short time values that are above/below the background pore pressure.

Rawal, Chakra

2012-05-01T23:59:59.000Z

90

A study of detonation timing and fragmentation using 3-D finite element techniques and a damage constitutive model  

SciTech Connect

The transient dynamics finite element computer program, PRONTO-3D, has been used in conjunction with a damage constitutive model to study the influence of detonation timing on rock fragmentation during blasting. The primary motivation of this study is to investigate the effectiveness of precise detonators in improving fragmentation. PRONTO-3D simulations show that a delay time of 0.0 sec between adjacent blastholes results in significantly more fragmentation than a 0.5 ms delay.

Preece, D.S.; Thorne, B.J.

1996-03-01T23:59:59.000Z

91

3D CFD ELECTROCHEMICAL AND HEAT TRANSFER MODEL OF AN INTERNALLY MANIFOLDED SOLID OXIDE ELECTROLYSIS CELL  

DOE Green Energy (OSTI)

A three-dimensional computational fluid dynamics (CFD) electrochemical model has been created to model high-temperature electrolysis cell performance and steam electrolysis in an internally manifolded planar solid oxide electrolysis cell (SOEC) stack. This design is being evaluated at the Idaho National Laboratory for hydrogen production from nuclear power and process heat. Mass, momentum, energy, and species conservation and transport are provided via the core features of the commercial CFD code FLUENT. A solid-oxide fuel cell (SOFC) model adds the electrochemical reactions and loss mechanisms and computation of the electric field throughout the cell. The FLUENT SOFC user-defined subroutine was modified for this work to allow for operation in the SOEC mode. Model results provide detailed profiles of temperature, operating potential, steam-electrode gas composition, oxygen-electrode gas composition, current density and hydrogen production over a range of stack operating conditions. Single-cell and five-cell results will be presented. Flow distribution through both models is discussed. Flow enters from the bottom, distributes through the inlet plenum, flows across the cells, gathers in the outlet plenum and flows downward making an upside-down ''U'' shaped flow pattern. Flow and concentration variations exist downstream of the inlet holes. Predicted mean outlet hydrogen and steam concentrations vary linearly with current density, as expected. Effects of variations in operating temperature, gas flow rate, oxygen-electrode and steam-electrode current density, and contact resistance from the base case are presented. Contour plots of local electrolyte temperature, current density, and Nernst potential indicate the effects of heat transfer, reaction cooling/heating, and change in local gas composition. Results are discussed for using this design in the electrolysis mode. Discussion of thermal neutral voltage, enthalpy of reaction, hydrogen production, cell thermal efficiency, cell electrical efficiency, and Gibbs free energy are discussed and reported herein.

Grant L. Hawkes; James E. O'Brien; Greg Tao

2011-11-01T23:59:59.000Z

92

A 3-D Model-Based Approach for the PET-Functional and MR-Anatomical Cardiac Imaging Data Fusion  

Science Conference Proceedings (OSTI)

In this paper, an approach for the assessment of 3-D functional maps of the heart is proposed. It relies on the model-based coregistration of MR anatomical and PET metabolic images and the extraction of an individualized anatomical heart model from MR ...

Timo Mäkelä; Quoc-Cuong Pham; Patrick Clarysse; Jyrki Lötjönen; Kirsi Lauerma; Helena Hänninen; Juhani Knuuti; Toivo Katila; Isabelle E. Magnin

2001-11-01T23:59:59.000Z

93

Density Coordinate Mixed Layer Models  

Science Conference Proceedings (OSTI)

The development of mixed layer models in so-called density coordinates is discussed. Density coordinates, or isopycnal coordinates as they are sometimes called, are becoming increasingly popular for use in ocean models due to their highly ...

William K. Dewar

2001-02-01T23:59:59.000Z

94

A 3-D Canopy Radiative Transfer Model for Global Climate Modeling: Description, Validation and Application  

Science Conference Proceedings (OSTI)

The process of solar radiative transfer at the land surface is important to energy, water and carbon balance, especially for vegetated areas. Currently the most commonly used two-stream model considers the Plant Functional Types (PFTs) within a ...

Hua Yuan; Robert E. Dickinson; Yongjiu Dai; Muhammad J. Shaikh; Liming Zhou; Wei Shangguan; Duoying Ji

95

3D CFD Model of a Multi-Cell High Temperature Electrolysis Stack  

DOE Green Energy (OSTI)

A three-dimensional computational fluid dynamics (CFD) electrochemical model has been created to model high-temperature electrolysis stack performance and steam electrolysis in the Idaho National Laboratory Integrated Lab Scale (ILS) experiment. The model is made of 60 planar cells stacked on top of each other operated as Solid Oxide Electrolysis Cells (SOEC). Details of the model geometry are specific to a stack that was fabricated by Ceramatec, Inc1. and tested at the Idaho National Laboratory. Inlet and outlet plenum flow and distribution are considered. Mass, momentum, energy, and species conservation and transport are provided via the core features of the commercial CFD code FLUENT2. A solid-oxide fuel cell (SOFC) model adds the electrochemical reactions and loss mechanisms and computation of the electric field throughout the cell. The FLUENT SOFC userdefined subroutine was modified for this work to allow for operation in the SOEC mode. Model results provide detailed profiles of temperature, Nernst potential, operating potential, activation overpotential, anode-side gas composition, cathode-side gas composition, current density and hydrogen production over a range of stack operating conditions. Variations in flow distribution, and species concentration are discussed. End effects of flow and per-cell voltage are also considered.

G.L. Hawkes; J. E. O'Brien; C. M. Stoots

2007-11-01T23:59:59.000Z

96

3-D CFD MODEL OF A MULTI-CELL HIGH TEMPERATURE ELECTROLYSIS STACK  

DOE Green Energy (OSTI)

A three-dimensional computational fluid dynamics (CFD) electrochemical model has been created to model high-temperature electrolysis stack performance and steam electrolysis in the Idaho National Laboratory (INL) Integrated Lab Scale (ILS) experiment. The model is made of 60 planar cells stacked on top of each other operated as Solid Oxide Electrolysis Cells (SOEC). Details of the model geometry are specific to a stack that was fabricated by Ceramatec, Inc. and tested at INL. Inlet and outlet plenum flow and distribution are considered. Mass, momentum, energy, and species conservation and transport are provided via the core features of the commercial CFD code FLUENT. A solid-oxide fuel cell (SOFC) model adds the electrochemical reactions and loss mechanisms and computation of the electric field throughout the cell. The FLUENT SOFC user defined subroutine was modified for this work to allow for operation in the SOEC mode. Model results provide detailed profiles of temperature, Nernst potential, operating potential, activation over-potential, anode-side gas composition, cathode-side gas composition, current density, and hydrogen production over a range of stack operating conditions. Variations in flow distribution and species concentration are discussed. End effects of flow and per-cell voltage are also considered.

Grant Hawkes; James O'Brien; Carl Stoots; Brian Hawkes

2009-05-01T23:59:59.000Z

97

Efficient Representation in 3D Environment Modeling for Planetary Robotic Exploration  

E-Print Network (OSTI)

is a tremendous amount of different map representations including for example occupancy grids [25], correspondence exploration, 3D mapping, surface representation, plane fitting published in: Advanced Robotics, Vol. 24, Iss, is also a drawback when it comes to the processing of the data, respectively the transmission of the data

Birk, Andreas

98

3D modelling of an important symbol of the orthodox wooden churches: the imperial gates  

Science Conference Proceedings (OSTI)

The paper presents an on-going process to digitally reconstruct the Imperial Gates of the old Romanian orthodox churches scattered on a large geographical area in Transylvania. Due to the locations of the churches and to the indestructible character ... Keywords: 3d scanning, cultural heritage, imperial gates, orthodox wooden churches

Radu Moraru; Oana Gui; Ioan Chirila

2011-07-01T23:59:59.000Z

99

Elliptic Flow from a Hybrid CGC, Full 3D Hydro and Hadronic Cascade Model  

E-Print Network (OSTI)

We investigate the robustness of the discovery of the perfect fluid through comparison of hydrodynamic calculations with the elliptic flow coefficient v_2 at midrapidity in Au+Au collisions at sqrt{s_{NN}}=200 GeV. Employing the Glauber model for initial entropy density distributions, the centrality dependence of v_2 is reasonably reproduced by using an ideal fluid description of the early QGP stage followed by a hadronic cascade in the late hadronic stage. On the other hand, initial conditions based on the Colour Glass Condensate model are found to generate larger elliptic flow due to larger initial eccentricity epsilon. We further predict v_2/epsilon at a fixed impact parameter as a function of collision energy sqrt{s_{NN}} up to the LHC energy.

Tetsufumi Hirano; Ulrich W. Heinz; Dmitri Kharzeev; Roy Lacey; Yasushi Nara

2007-01-25T23:59:59.000Z

100

3D modeling of uranium-bearing solution-collapse breccias in Proterozoic sandstones (Athabasca Basin, Canada)-Metallogenic interpretations  

Science Conference Proceedings (OSTI)

Unconformity-related uranium deposits are the highest grade, large tonnage uranium resources in the world. In the Athabasca Basin (northern Saskatchewan, Canada), which is the premier host for unconformity-type deposits, the ore deposits are frequently ... Keywords: 3D modeling, Athabasca basin, Breccia, Fluid rock ratio, Uranium deposit

Christian Le Carlier de Veslud; Michel Cuney; Guillaume Lorilleux; Jean-Jacques Royer; Michel Jébrak

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

3D modeling of large and complex site using multi-sensor integration and multi-resolution data  

Science Conference Proceedings (OSTI)

The article describes a multi-resolution approach developed for the 3D modeling of the entire Roman Forum in Pompeii, Italy. The archaeological area, approximately 150 x 80 m, contains more than 350 finds spread all over the Forum as well as larger mural ...

Gabriele Guidi; Fabio Remondino; Michele Russo; Fabio Menna; Alessandro Rizzi

2008-12-01T23:59:59.000Z

102

ON THE DYNAMICS OF THE SOLAR CORONA: FIRST RESULTS OBTAINED WITH A NEW 3D MHD MODEL  

E-Print Network (OSTI)

; CWENO. 1. MOTIVATION For many decades space scientists have been at- tracted to the solar wind and its1 ON THE DYNAMICS OF THE SOLAR CORONA: FIRST RESULTS OBTAINED WITH A NEW 3D MHD MODEL J. Kleimann 1) is applied to the problem of the dynamics of the solar corona. First, we present the basic system

Grauer, Rainer

103

Virtual architectural 3d model of the imperial cathedral (kaiserdom) of königslutter, germany through terrestrial laser scanning  

Science Conference Proceedings (OSTI)

The imperial cathedral (Kaiserdom) of Königslutter, Germany, is one of the most important examples of Romanesque architecture north of the Alps. In April 2010 complex conservation and restoration works were finished to celebrate the 875th ... Keywords: 3D, CAD, laser scanning, modelling, terrestrial, visualisation

Thomas P. Kersten; Maren Lindstaedt

2012-10-01T23:59:59.000Z

104

Oxygen lines in solar granulation. I. Testing 3D models against new observations with high spatial and spectral resolution  

E-Print Network (OSTI)

Aims: we seek to provide additional tests of the line formation of theoretical 3D solar photosphere models. In particular, we set out to test the spatially-resolved line formation at several viewing angles, from the solar disk-centre to the limb and focusing on atomic oxygen lines. The purpose of these tests is to provide additional information on whether the 3D model is suitable to derive the solar oxygen abundance. We also aim to empirically constrain the NLTE recipes for neutral hydrogen collisions, using the spatially-resolved observations of the OI 777 nm lines. Methods: using the Swedish 1-m Solar Telescope we obtained high-spatial-resolution observations of five atomic oxygen lines (along with lines for other species) for five positions on the solar disk. These observations have a high spatial and spectral resolution, and a continuum intensity contrast up to 9% at 615 nm. The theoretical line profiles were computed using the 3D model, with a full 3D NLTE treatment for oxygen and LTE for the other lines...

Pereira, Tiago M D; Asplund, Martin

2009-01-01T23:59:59.000Z

105

Extraction and integration of window in a 3d building model from ground view images  

E-Print Network (OSTI)

Details of the building facades are needed for high quality fly-through visualization or simulation applications. Windows form a key structure in the detailed facade reconstruction. In this paper, given calibrated facade texture (i.e. the rectified texture), we extract and reconstruct the 3D window structure of the building. We automatically extract windows (rectangles in the rectified image) using a profile projection method, which exploits the regularity of the vertical and horizontal window placement. We classify the extracted windows using 2D dimensions and image texture information. The depth of the extracted windows is automatically computed using window classification information and image line features. A single ground view image is enough to compute 3D depths of the facade windows in our approach. 1

Sung Chun Lee; Ram Nevatia

2004-01-01T23:59:59.000Z

106

Does Calcium diffusional global feedback leads to slow light adaptation in Drosophila photoreceptors? - A 3D biophysical modelling approach  

E-Print Network (OSTI)

, China. 5Computational Neuroscience Unit, Okinawa Institute of Science and Technology, Okinawa 904-0411, Japan. 6Theoretical Neurobiology, University of Antwerp, 2610 Antwerp, Belgium. Published: 18 July 2011 Reference 1. Song Z, Billings S, Coca D... photoreceptors? - A 3D biophysical modelling approach. BMC Neuroscience 2011 12(Suppl 1):P56. * Correspondence: zhuoyi.song@shef.ac.uk 1Department of Biomedical Science, University of Sheffield, Sheffield S10 2TN, UK 5Computational Neuroscience Unit, Okinawa...

2011-07-18T23:59:59.000Z

107

P-wave re ections in 3-D model of coal basin with boulders (has been accepted for poster presentation at EAGE conference, Leipzig 1998)  

E-Print Network (OSTI)

P-wave re ections in 3-D model of coal basin with boulders (has been accepted for poster to the computation of re ections in 3-D model of coal basin with four boulders located in the upper bed of the coal. Tselentis, pers. comm.). The model is composed of a low velocity layer, upper bed, four boulders, coal seam

Cerveny, Vlastislav

108

Integrative multicellular biological modeling: a case study of 3D epidermal development using GPU algorithms  

E-Print Network (OSTI)

algorithms for agent-based model simulation of tuberculosisA Framework for Megascale Agent Based Model Simulations ondifferentiation in an agent-based model of hypersensitivity

Christley, Scott; Lee, Briana; Dai, Xing; Nie, Qing

2010-01-01T23:59:59.000Z

109

A high-resolution 2-DH numerical scheme for process-based modeling of 3-D turbidite fan stratigraphy  

Science Conference Proceedings (OSTI)

A generic three-dimensional process-based model is presented, aimed at simulation of the construction of turbidite fan stratigraphy by low-density turbidity current events. It combines theoretical formulations on density flow and sediment transport of ... Keywords: MacCormack scheme, Operator splitting, Shock-capturing technique, Stratigraphic modeling, Turbidite reservoirs, Turbidity currents

Remco M. Groenenberg; Kees Sloff; Gert Jan Weltje

2009-08-01T23:59:59.000Z

110

3D Geologic Modeling of the Southern San Joaquin Basin for the Westcarb Kimberlina Demonstration Project- A Status Report  

SciTech Connect

The objective of the Westcarb Kimberlina pilot project is to safely inject 250,000 t CO{sub 2}/yr for four years into the deep subsurface at the Clean Energy Systems (CES) Kimberlina power plant in southern San Joaquin Valley, California. In support of this effort, we have constructed a regional 3D geologic model of the southern San Joaquin basin. The model is centered on the Kimberlina power plant and spans the UTM range E 260000-343829 m and N 3887700-4000309 m; the depth of the model ranges from the topographic surface to >9000 m below sea level. The mapped geologic units are Quaternary basin fill, Tertiary marine and continental deposits, and pre-Tertiary basement rocks. Detailed geologic data, including surface maps, borehole data, and geophysical surveys, were used to define the geologic framework. Fifteen time-stratigraphic formations were mapped, as well as >140 faults. The free surface is based on a 10 m lateral resolution DEM. We use Earthvision (Dynamic Graphics, Inc.) to integrate the geologic and geophysical information into a 3D model of x,y,z,p nodes, where p is a unique integer index value representing the geologic unit. This grid represents a realistic model of the subsurface geology and provides input into subsequent flow simulations.

Wagoner, J

2009-02-23T23:59:59.000Z

111

3D Geologic Modeling of the Southern San Joaquin Basin for the Westcarb Kimberlina Demonstration Project- A Status Report  

SciTech Connect

The objective of the Westcarb Kimberlina pilot project is to safely inject 250,000 t CO{sub 2}/yr for four years into the deep subsurface at the Clean Energy Systems (CES) Kimberlina power plant in southern San Joaquin Valley, California. In support of this effort, we have constructed a regional 3D geologic model of the southern San Joaquin basin. The model is centered on the Kimberlina power plant and spans the UTM range E 260000-343829 m and N 3887700-4000309 m; the depth of the model ranges from the topographic surface to >9000 m below sea level. The mapped geologic units are Quaternary basin fill, Tertiary marine and continental deposits, and pre-Tertiary basement rocks. Detailed geologic data, including surface maps, borehole data, and geophysical surveys, were used to define the geologic framework. Fifteen time-stratigraphic formations were mapped, as well as >140 faults. The free surface is based on a 10 m lateral resolution DEM. We use Earthvision (Dynamic Graphics, Inc.) to integrate the geologic and geophysical information into a 3D model of x,y,z,p nodes, where p is a unique integer index value representing the geologic unit. This grid represents a realistic model of the subsurface geology and provides input into subsequent flow simulations.

Wagoner, J

2009-04-24T23:59:59.000Z

112

3-D numerical modelling of coastal currents and suspended sediment transport  

Science Conference Proceedings (OSTI)

A three dimensional hydrodynamic and suspended sediment transport model (HYDROTAM-3) has been developed and applied to Fethiye Bay. Model can simulate the transport processes due to tidal or nontidal forcing which may be barotropic or baroclinic. The ...

Lale Balas; Alp Küçükosmano?lu; Umut Yegül

2006-05-01T23:59:59.000Z

113

3D CAD modeling and visualization of the tunnel construction process in a distributed simulation environment  

Science Conference Proceedings (OSTI)

Computer simulation has been successfully implemented in the construction industry for the decision making process; however, current modeling approaches focus mainly on process modeling and cannot integrate or assimilate information from different software. ...

Yang Zhang; Elmira Moghani; Simaan M. AbouRizk; Siri Fernando

2010-12-01T23:59:59.000Z

114

Robust 3D Face Tracking on Unknown Users with Dynamical Active Models  

Science Conference Proceedings (OSTI)

The Active Appearance Models [1] and the derived Active Models (AM) [4] allow to robustly track the face of a single user that was previously learnt, but works poorly with multiple or unknown users. Our research aims at improving the tracking robustness ... Keywords: Active Appearance Models, Face Animation, Face Tracking, Virtual Reality

Dianle Zhou; Patrick Horain

2009-01-01T23:59:59.000Z

115

A 3D Monte Carlo Photoionization Code for Modeling Diffuse Ionized Gas  

E-Print Network (OSTI)

We have developed a three dimensional Monte Carlo photoionization code tailored for the study of Galactic H II regions and the percolation of ionizing photons in diffuse ionized gas. We describe the code, our calculation of photoionization, heating & cooling, and the approximations we have employed for the low density H II regions we wish to study. Our code gives results in agreement with the Lexington H II region benchmarks. We show an example of a 2D shadowed region and point out the very significant effect that diffuse radiation produced by recombinations of helium has on the temperature within the shadow.

Wood, K; Ercolano, B

2004-01-01T23:59:59.000Z

116

3D Meso-scale Modelling of Aluminum-alloy Welding Processes for ...  

Science Conference Proceedings (OSTI)

In the present study, a granular model of solidification has been developed to simulate the welding process as a first step towards predicting solidification ...

117

3D thermal-electrochemical lithium-ion battery computational modeling.  

E-Print Network (OSTI)

??The thesis presents a modeling framework for simulating three dimensional effects in lithium-ion batteries. This is particularly important for understanding the performance of large scale… (more)

Gerver, Rachel Ellen

2010-01-01T23:59:59.000Z

118

3D tissue models for the study of the effects of low-dose irradiation  

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

number of more quantitative models of important developmental processes in the mammary gland which can be applied to the study of the interactions between low-dose irradiation,...

119

Coupled 3D hydrodynamic models for submarine outfalls. Denvironmental hydraulic design and control of multiport diffusers.  

E-Print Network (OSTI)

??The book describes the hydraulic design and environmental impact prediction technologies for such installations. Focus are the hydrodynamics approached by computer models. First, a multiport… (more)

Bleninger, Tobias

2007-01-01T23:59:59.000Z

120

A 3D CFD Model of a DC Slab Caster Melt Delivery System  

Science Conference Proceedings (OSTI)

Numerical Modeling of Centrifugally Cast HSS Rolls · Numerical Simulation of Electro-magnetic Turbulent Inhibitor Technology in a Tundish · Optimizing the ...

Note: This page contains sample records for the topic "3-d density 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

Conservation of attribute data during geometric upgrading of 3D models.  

E-Print Network (OSTI)

?? Existing models of Norwegian offshore platforms are generally incomplete and lack the accuracy needed to eliminate clashes between the existing parts on the platform… (more)

Moe, Jon

2005-01-01T23:59:59.000Z

122

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

123

K. Toyota et al.: 3-D modeling of boundary-layer bromine and ozone in the Arctic (Supplement) 1 Supplement to "Analysis of reactive bromine production and ozone  

E-Print Network (OSTI)

K. Toyota et al.: 3-D modeling of boundary-layer bromine and ozone in the Arctic (Supplement) 1 3-D simulations with GEM-AQ: Inference from synoptic-scale patterns" K. Toyota1,2 , J. C. McConnell1. Toyota (kenjiro.toyota@ec.gc.ca) scale forcing resolved well at the grid resolution used in the present

Meskhidze, Nicholas

124

Variational Data Assimilation in the Tropics Using Precipitation Data. Part II: 3D Model  

Science Conference Proceedings (OSTI)

A global primitive equation model is used to examine the performance of four-dimensional variational data assimilation (4D-VAR) with moist processes and to assess the impact of assimilating precipitation data in the Tropics. Several types of ...

Tadashi Tsuyuki

1996-11-01T23:59:59.000Z

125

Non-linear approximations for solving 3D-packing MIP models: a ...  

E-Print Network (OSTI)

MINLP solvers up to exploiting linear substructures of the mathematical model. ..... Floudas CA (1995) Nonlinear and Mixed Integer Optimization: Fundamentals and ... (1999) Handbook of Test Problems in Local and Global Optimization.

126

Simulating HFIR Core Thermal Hydraulics Using 3D-2D Model Coupling  

SciTech Connect

A model utilizing interdimensional variable coupling is presented for simulating the thermal hydraulic interactions of the High Flux Isotope Reactor (HFIR) core at Oak Ridge National Laboratory (ORNL). The model s domain consists of a single, explicitly represented three-dimensional fuel plate and a simplified two-dimensional coolant channel slice. In simplifying the coolant channel, and thus the number of mesh points in which the Navier-Stokes equations must be solved, the computational cost and solution time are both greatly reduced. In order for the reduced-dimension coolant channel to interact with the explicitly represented fuel plate, however, interdimensional variable coupling must be enacted along all shared boundaries. The primary focus of this paper is in detailing the collection, storage, passage, and application of variables across this interdimensional interface. Comparisons are made showing the general speed-up associated with this simplified coupled model.

Travis, Adam R [ORNL] ORNL; Freels, James D [ORNL] ORNL; Ekici, Kivanc [ORNL] ORNL

2013-01-01T23:59:59.000Z

127

Simulated random surfaces and effective string models in 3D Z(2) gauge theory  

E-Print Network (OSTI)

All-order strong coupling simulations have been used to derive precise energies of string states in the confined phase of three dimensional Z(2) lattice gauge theory. The behavior of the ground state energy is here compared with predictions of effective string theory. Our new data reported here are consistent with known universal terms of the long string length ($L_0$) expansion known from effective string models in the continuum limit. Our precision is however still not sufficient to disentangle non-univeral terms of order $L_0^{-7}

Tomasz Korzec; Ulli Wolff

2013-09-05T23:59:59.000Z

128

Modeling a Helical-coil Steam Generator in RELAP5-3D for the Next Generation Nuclear Plant  

SciTech Connect

Options for the primary heat transport loop heat exchangers for the Next Generation Nuclear Plant are currently being evaluated. A helical-coil steam generator is one heat exchanger design under consideration. Safety is an integral part of the helical-coil steam generator evaluation. Transient analysis plays a key role in evaluation of the steam generators safety. Using RELAP5-3D to model the helical-coil steam generator, a loss of pressure in the primary side of the steam generator is simulated. This report details the development of the steam generator model, the loss of pressure transient, and the response of the steam generator primary and secondary systems to the loss of primary pressure. Back ground on High Temperature Gas-cooled reactors, steam generators, the Next Generation Nuclear Plant is provided to increase the readers understanding of the material presented.

Nathan V. Hoffer; Piyush Sabharwall; Nolan A. Anderson

2011-01-01T23:59:59.000Z

129

Benchmark of Atucha-2 PHWR RELAP5-3D control rod model by Monte Carlo MCNP5 core calculation  

Science Conference Proceedings (OSTI)

Atucha-2 is a Siemens-designed PHWR reactor under construction in the Republic of Argentina. Its geometrical complexity and peculiarities require the adoption of advanced Monte Carlo codes for performing realistic neutronic simulations. Therefore core models of Atucha-2 PHWR were developed using MCNP5. In this work a methodology was set up to collect the flux in the hexagonal mesh by which the Atucha-2 core is represented. The scope of this activity is to evaluate the effect of obliquely inserted control rod on neutron flux in order to validate the RELAP5-3D{sup C}/NESTLE three dimensional neutron kinetic coupled thermal-hydraulic model, applied by GRNSPG/UNIPI for performing selected transients of Chapter 15 FSAR of Atucha-2. (authors)

Pecchia, M.; D'Auria, F. [San Piero A Grado Nuclear Research Group GRNSPG, Univ. of Pisa, via Diotisalvi, 2, 56122 - Pisa (Italy); Mazzantini, O. [Nucleo-electrica Argentina Societad Anonima NA-SA, Buenos Aires (Argentina)

2012-07-01T23:59:59.000Z

130

3D Thermal and Electrochemical Model for Spirally Wound Large Format Lithium-ion Batteries (Presentation)  

DOE Green Energy (OSTI)

In many commercial cells, long tabs at both cell sides, leading to uniform potentials along the spiral direction of wound jelly rolls, are rarely seen because of their high manufacturing cost. More often, several metal strips are welded at discrete locations along both current collector foils. With this design, the difference of electrical potentials is easily built up along current collectors in the spiral direction. Hence, the design features of the tabs, such as number, location and size, can be crucial factors for spiral-shaped battery cells. This paper presents a Li-ion battery cell model having a 3-dimensional spiral mesh involving a wound jellyroll structure. Further results and analysis will be given regarding impacts of tab location, number, and size.

Lee, K. J.; Kim, G. H.; Smith, K.

2010-10-14T23:59:59.000Z

131

An Investigation of Ice Production Mechanisms in Small Cumuliform Clouds Using a 3D Model with Explicit Microphysics. Part II: Case Study of New Mexico Cumulus Clouds  

Science Conference Proceedings (OSTI)

A new 3D model with explicit liquid- and ice-phase microphysics and a detailed treatment of ice nucleation and multiplication processes is applied to study ice formation and evolution in cumulus clouds. Simulation results are compared with in ...

Mikhail Ovtchinnikov; Yefim L. Kogan; Alan M. Blyth

2000-09-01T23:59:59.000Z

132

Solid modeling techniques to build 3D finite element models of volcanic systems: An example from the Rabaul Caldera system, Papua New Guinea  

Science Conference Proceedings (OSTI)

Simulating the deformation of active volcanoes is challenging due to inherent mechanical complexities associated with heterogeneous distributions of rheologic properties and irregular geometries associated with the topography and bathymetry. From geologic ... Keywords: 3D geometry, Deformation, Finite Elements Models, Rabaul Caldera

Erika Ronchin, Timothy Masterlark, Joan Martí Molist, Steve Saunders, Wei Tao

2013-03-01T23:59:59.000Z

133

A workflow for handling heterogeneous 3D models with the TOUGH2 family of codes: Applications to numerical modeling of CO2 geological storage  

Science Conference Proceedings (OSTI)

This paper is addressed to the TOUGH2 user community. It presents a new tool for handling simulations run with the TOUGH2 code with specific application to CO"2 geological storage. This tool is composed of separate FORTRAN subroutines (or modules) that ... Keywords: 3D visualization, CO2 geological storage, Multiphase flow, Pre and post processing, Reactive transport modeling, TOUGH2

Pascal Audigane; Christophe Chiaberge; Frédéric Mathurin; Julie Lions; Géraldine Picot-Colbeaux

2011-04-01T23:59:59.000Z

134

Use of GIS and 3D Modeling for Development and Conceptualization of a Performance Assessment Model for Decommissioning of a Complex Site  

Science Conference Proceedings (OSTI)

Geographic Information Systems (GIS) and 3D geo-spatial modeling were employed to facilitate development and conceptualization of a performance assessment (PA) model that will be used to evaluate the health impacts of residual radioactivity at a former nuclear materials processing facility site in New York. Previous operations have resulted in a number of different sources of radiological contamination that must be assessed during site decommissioning. A performance assessment model is being developed to estimate radiological dose to potential receptors through the simulation of the release and transport of radionuclides, and exposure to residual contamination for hundreds to thousands of years in the future. A variety of inputs are required to parameterize the performance assessment model, such as: distance from the waste to surface water bodies, thickness of geologic units for saturated transport, saturated thickness of the geologic units, and spatial and temporal average of percent of waste that is saturated. GIS and 3D modeling are used to analyze and abstract aleatory uncertainty associated with the dimensionality of the geologic system into epistemic uncertainty for one- and two-dimensional process models for flow and transport of radionuclides. Three-dimensional geo-spatial modeling was used to develop the geologic framework and the geometrical representation of the residual contamination within the geologic framework. GIS was used in the initial development and parameterization of the transport pathways, to provide spatial context to the PA model, and to link it to the 3D geologic framework and contamination geometry models. Both the GIS and 3-D modeling were used to interpret the results of runs of the PA model. (authors)

Esh, D. W.; Gross, A. J.; Thaggard, M. [U.S. Nuclear Regulatory Commission, Two White Flint North, MS T7J8, 11545 Rockville Pike, Rockville, MD 20852 (United States)

2006-07-01T23:59:59.000Z

135

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

136

3D CFD Electrochemical and Heat Transfer Model of an Integrated-Planar Solid Oxide Electrolysis Cells  

DOE Green Energy (OSTI)

A three-dimensional computational fluid dynamics (CFD) electrochemical model has been created to model high-temperature electrolysis cell performance and steam electrolysis in a new novel integrated planar porous-tube supported solid oxide electrolysis cell (SOEC). The model is of several integrated planar cells attached to a ceramic support tube. This design is being evaluated with modeling at the Idaho National Laboratory. Mass, momentum, energy, and species conservation and transport are provided via the core features of the commercial CFD code FLUENT. A solid-oxide fuel cell (SOFC) model adds the electrochemical reactions and loss mechanisms and computation of the electric field throughout the cell. The FLUENT SOFC user-defined subroutine was modified for this work to allow for operation in the SOEC mode. Model results provide detailed profiles of temperature, Nernst potential, operating potential, activation over-potential, anode-side gas composition, cathode-side gas composition, current density and hydrogen production over a range of stack operating conditions. Mean per-cell area-specific-resistance (ASR) values decrease with increasing current density. Predicted mean outlet hydrogen and steam concentrations vary linearly with current density, as expected. Effects of variations in operating temperature, gas flow rate, cathode and anode exchange current density, and contact resistance from the base case are presented. Contour plots of local electrolyte temperature, current density, and Nernst potential indicated the effects of heat transfer, reaction cooling/heating, and change in local gas composition. Results are discussed for using this design in the electrolysis mode. Discussion of thermal neutral voltage, enthalpy of reaction, hydrogen production, cell thermal efficiency, cell electrical efficiency, and Gibbs free energy are discussed and reported herein.

Grant Hawkes; James E. O'Brien

2008-10-01T23:59:59.000Z

137

3D Shape Research  

Science Conference Proceedings (OSTI)

Shape Analysis Research Project. Summary: ... We have organized two workshops on 3D shape retrieval and two shape retrieval contests. ...

2010-10-05T23:59:59.000Z

138

BIOFUELS 3D Database  

Science Conference Proceedings (OSTI)

BIOFUEL Database. NIST Home. BIOFUEL 3-D Structures ( Help / Contact / Rate Our Product and Services / NIST privacy policy ). Search: ...

139

Modeling Warm Dense Matter Experiments using the 3D ALE-AMR Code and the Move Toward Exascale Computing  

SciTech Connect

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 NDCX II will be used in studies of material in the warm dense matter (WDM) regime, and ion beam/hydrodynamic coupling experiments relevant to heavy ion based inertial fusion energy. We discuss recent efforts to adapt the 3D ALE-AMR code to model WDM experiments on NDCX II. The code, which combines Arbitrary Lagrangian Eulerian (ALE) hydrodynamics with Adaptive Mesh Refinement (AMR), has physics models that include ion deposition, radiation hydrodynamics, thermal diffusion, anisotropic material strength with material time history, and advanced models for fragmentation. Experiments at NDCX-II will explore the process of bubble and droplet formation (two-phase expansion) of superheated metal solids using ion beams. Experiments at higher temperatures will explore equation of state and heavy ion fusion beam-to-target energy coupling efficiency. Ion beams allow precise control of local beam energy deposition providing uniform volumetric heating on a timescale shorter than that of hydrodynamic expansion. The ALE-AMR code does not have any export control restrictions and is currently running at the National Energy Research Scientific Computing Center (NERSC) at LBNL and has been shown to scale well to thousands of CPUs. New surface tension models that are being implemented and applied to WDM experiments. Some of the approaches use a diffuse interface surface tension model that is based on the advective Cahn-Hilliard equations, which allows for droplet breakup in divergent velocity fields without the need for imposed perturbations. Other methods require seeding or other methods for droplet breakup. We also briefly discuss the effects of the move to exascale computing and related computational changes on general modeling codes in fusion energy.

Koniges, A; Eder, E; Liu, W; Barnard, J; Friedman, A; Logan, G; Fisher, A; Masers, N; Bertozzi, A

2011-11-04T23:59:59.000Z

140

Characterizing 3D shapes using fractal dimension  

Science Conference Proceedings (OSTI)

Developments in techniques for modeling and digitizing have made the use of 3D models popular to a large number of new applications. With the diffusion and spreading of 3D models employment, the demand for efficient search and retrieval methods is high. ... Keywords: 3D shape descriptor, complexity, fractal dimension

Danilo Medeiros Eler; Rosane Minghim; Odemir Martinez Bruno / André Ricardo Backes

2010-11-01T23:59:59.000Z

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141

Modeling a Printed Circuit Heat Exchanger with RELAP5-3D for the Next Generation Nuclear Plant  

Science Conference Proceedings (OSTI)

The main purpose of this report is to design a printed circuit heat exchanger (PCHE) for the Next Generation Nuclear Plant and carry out Loss of Coolant Accident (LOCA) simulation using RELAP5-3D. Helium was chosen as the coolant in the primary and secondary sides of the heat exchanger. The design of PCHE is critical for the LOCA simulations. For purposes of simplicity, a straight channel configuration was assumed. A parallel intermediate heat exchanger configuration was assumed for the RELAP5 model design. The RELAP5 modeling also required the semicircular channels in the heat exchanger to be mapped to rectangular channels. The initial RELAP5 run outputs steady state conditions which were then compared to the heat exchanger performance theory to ensure accurate design is being simulated. An exponential loss of pressure transient was simulated. This LOCA describes a loss of coolant pressure in the primary side over a 20 second time period. The results for the simulation indicate that heat is initially transferred from the primary loop to the secondary loop, but after the loss of pressure occurs, heat transfers from the secondary loop to the primary loop.

Not Available

2010-12-01T23:59:59.000Z

142

Modeling Nuclear Pasta and the Transition to Uniform Nuclear Matter with the 3D-Skyrme-Hartree-Fock Method  

E-Print Network (OSTI)

The first results of a new three-dimensional, finite temperature Skyrme-Hartree-Fock+BCS study of the properties of inhomogeneous nuclear matter at densities and temperatures leading to the transition to uniform nuclear matter are presented. A constraint is placed on the two independent components of the quadrupole moment in order to self-consistently explore the shape phase space of nuclear configurations. The scheme employed naturally allows effects such as (i) neutron drip, which results in an external neutron gas, (ii) the variety of exotic nuclear shapes expected for extremely neutron heavy nuclei, and (iii) the subsequent dissolution of these nuclei into nuclear matter. In this way, the equation of state can be calculated across phase transitions from lower densities (where one dimensional Hartree-Fock suffices) through to uniform nuclear matter without recourse to interpolation techniques between density regimes described by different physical models.

W. G. Newton

2009-03-08T23:59:59.000Z

143

Modeling Nuclear Pasta and the Transition to Uniform Nuclear Matter with the 3D-Skyrme-Hartree-Fock Method  

E-Print Network (OSTI)

The first results of a new three-dimensional, finite temperature Skyrme-Hartree-Fock+BCS study of the properties of inhomogeneous nuclear matter at densities and temperatures leading to the transition to uniform nuclear matter are presented. A constraint is placed on the two independent components of the quadrupole moment in order to self-consistently explore the shape phase space of nuclear configurations. The scheme employed naturally allows effects such as (i) neutron drip, which results in an external neutron gas, (ii) the variety of exotic nuclear shapes expected for extremely neutron heavy nuclei, and (iii) the subsequent dissolution of these nuclei into nuclear matter. In this way, the equation of state can be calculated across phase transitions from lower densities (where one dimensional Hartree-Fock suffices) through to uniform nuclear matter without recourse to interpolation techniques between density regimes described by different physical models.

Newton, W G

2009-01-01T23:59:59.000Z

144

Liquid cooling for 3D-ICs  

Science Conference Proceedings (OSTI)

This paper investigated micro-channel based liquid cooling in 3D-ICs. Specifically, the structure of 3D-IC with micro-channels, and its thermal/hydrodynamic modeling are studied. Also, the design challenges of micro-channel heat sinks in 3D-IC are summarized. Keywords: microchannel heat sink, liquid cooling, 3D-IC, thermal modeling, hydrodynamic modeling

Bing Shi; Ankur Srivastava

2011-07-01T23:59:59.000Z

145

3D scalar model as a 4D perfect conductor limit: Dimensional reduction and variational boundary conditions  

SciTech Connect

Under dimensional reduction, a system in D spacetime dimensions will not necessarily yield its D-1-dimensional analog version. Among other things, this result will depend on the boundary conditions and the dimension D of the system. We investigate this question for scalar and Abelian gauge fields under boundary conditions that obey the symmetries of the action. We apply our findings to the Casimir piston, an ideal system for detecting boundary effects. Our investigation is not limited to extra dimensions and we show that the original piston scenario proposed in 2004, a toy model involving a scalar field in 3D (2+1) dimensions, can be obtained via dimensional reduction from a more realistic 4D electromagnetic (EM) system. We show that for perfect conductor conditions, a D-dimensional EM field reduces to a D-1 scalar field and not its lower-dimensional version. For Dirichlet boundary conditions, no theory is recovered under dimensional reduction and the Casimir pressure goes to zero in any dimension. This ''zero Dirichlet'' result is useful for understanding the EM case. We then identify two special systems where the lower-dimensional version is recovered in any dimension: systems with perfect magnetic conductor (PMC) and Neumann boundary conditions. We show that these two boundary conditions can be obtained from a variational procedure in which the action vanishes outside the bounded region. The fields are free to vary on the surface and have zero modes, which survive after dimensional reduction.

Edery, Ariel [Physics Department, Bishop's University, 2600 College Street, Sherbrooke, Quebec, J1M 0C8 (Canada); Kavli Institute for Theoretical Physics, University of California, Kohn Hall, Santa Barbara, California 93106 (United States); Graham, Noah [Kavli Institute for Theoretical Physics, University of California, Kohn Hall, Santa Barbara, California 93106 (United States); Department of Physics, Middlebury College, Middlebury, Vermont 05753 (United States); MacDonald, Ilana [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, Ontario, M5S 3H4 (Canada); Physics Department, Bishop's University, 2600 College Street, Sherbrooke, Quebec, J1M 0C8 (Canada)

2009-06-15T23:59:59.000Z

146

3D geological modelling from boreholes, cross-sections and geological maps, application over former natural gas storages in coal mines  

Science Conference Proceedings (OSTI)

In a wide range of applications involving geological modelling, geological data available at low cost usually consist of documents such as cross-sections or geological maps and punctual data like borehole logs or outcrop descriptions. In order to build ... Keywords: 3D geological modelling, Data structuration, GIS, Geomodeler

Olivier Kaufmann; Thierry Martin

2008-03-01T23:59:59.000Z

147

3D Microstructure Studies  

Science Conference Proceedings (OSTI)

Jun 26, 2012 ... 2012 Summer School on 3D Microstructure Studies ... analysis of serial section data and synthetic microstructure generation, executables are.

148

Web3D  

Science Conference Proceedings (OSTI)

... Progress in creating 3D for the Web by Sandy Ressler, a member of the Information Access Division (IAD) in ITL, and others was noted in a recent ...

149

Phenotypic transition maps of 3D breast acini obtained by imaging-guided agent-based modeling  

SciTech Connect

We introduce an agent-based model of epithelial cell morphogenesis to explore the complex interplay between apoptosis, proliferation, and polarization. By varying the activity levels of these mechanisms we derived phenotypic transition maps of normal and aberrant morphogenesis. These maps identify homeostatic ranges and morphologic stability conditions. The agent-based model was parameterized and validated using novel high-content image analysis of mammary acini morphogenesis in vitro with focus on time-dependent cell densities, proliferation and death rates, as well as acini morphologies. Model simulations reveal apoptosis being necessary and sufficient for initiating lumen formation, but cell polarization being the pivotal mechanism for maintaining physiological epithelium morphology and acini sphericity. Furthermore, simulations highlight that acinus growth arrest in normal acini can be achieved by controlling the fraction of proliferating cells. Interestingly, our simulations reveal a synergism between polarization and apoptosis in enhancing growth arrest. After validating the model with experimental data from a normal human breast line (MCF10A), the system was challenged to predict the growth of MCF10A where AKT-1 was overexpressed, leading to reduced apoptosis. As previously reported, this led to non growth-arrested acini, with very large sizes and partially filled lumen. However, surprisingly, image analysis revealed a much lower nuclear density than observed for normal acini. The growth kinetics indicates that these acini grew faster than the cells comprising it. The in silico model could not replicate this behavior, contradicting the classic paradigm that ductal carcinoma in situ is only the result of high proliferation and low apoptosis. Our simulations suggest that overexpression of AKT-1 must also perturb cell-cell and cell-ECM communication, reminding us that extracellular context can dictate cellular behavior.

Tang, Jonathan; Enderling, Heiko; Becker-Weimann, Sabine; Pham, Christopher; Polyzos, Aris; Chen, Chen-Yi; Costes, Sylvain V

2011-02-18T23:59:59.000Z

150

PlantGL: A Python-based geometric library for 3D plant modelling at different scales  

Science Conference Proceedings (OSTI)

In this paper, we present PlantGL, an open-source graphic toolkit for the creation, simulation and analysis of 3D virtual plants. This C++ geometric library is embedded in the Python language which makes it a powerful user-interactive platform for plant ... Keywords: Canopy reconstruction, Crown envelopes, Graphic library, Plant architecture, Plant scene-graphs, Virtual plants

C. Pradal; F. Boudon; C. Nouguier; J. Chopard; C. Godin

2009-01-01T23:59:59.000Z

151

A finite-element approximation of a quasi-magnetostatic 3D eddy current model by fractional-step A-? scheme  

Science Conference Proceedings (OSTI)

We propose in this paper a fractional-step A-@j scheme for a quasi-magnetostatic 3D eddy current model by means of finite-element approximations. Bounds for continuous and discrete error in finite time are given, and it is verified that provided the ... Keywords: Eddy current problem, Error estimates, Finite-element approximation, Fractional-step A-? scheme

Changfeng Ma

2004-02-01T23:59:59.000Z

152

Integrating chemistry into 3D climate models: Detailed kinetics in the troposphere and stratosphere of a global climate model  

SciTech Connect

This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). The motivation for the project is to create the first complete, three-dimensional climate model that enfolds atmospheric photochemistry. The LANL chemical global climate model (GCM) not only distributes the trace greenhouse gases and modifies their concentrations within the detailed photochemical web, but also permits them to influence the radiation field and so force their own transport. Both atmospheric chemistry and fluid dynamics are nonlinear and zonally asymmetric phenomena. They can only be adequately modeled in three dimensions on the global grid. The kinetics-augmented GCM is the only program within the atmospheric community capable of investigating interaction involving chemistry and transport. The authors have conducted case studies of timely three-dimensional chemistry issues. Examples include ozone production from biomass burning plumes, kinetic feedbacks in zonally asymmetric transport phenomena with month- to year-long time scales, and volcano sulfate aerosols with respect to their potential effects on tropospheric ozone depletion.

Kao, C.Y.J.; Elliott, S. [Los Alamos National Lab., NM (United States). Earth and Environmental Sciences Div.; Turco, R.P.; Zhao, X. [Univ. of California, Los Angeles, CA (United States)

1997-11-01T23:59:59.000Z

153

Automotive Underhood Thermal Management Analysis Using 3-D Coupled Thermal-Hydrodynamic Computer Models: Thermal Radiation Modeling  

SciTech Connect

The goal of the radiation modeling effort was to develop and implement a radiation algorithm that is fast and accurate for the underhood environment. As part of this CRADA, a net-radiation model was chosen to simulate radiative heat transfer in an underhood of a car. The assumptions (diffuse-gray and uniform radiative properties in each element) reduce the problem tremendously and all the view factors for radiation thermal calculations can be calculated once and for all at the beginning of the simulation. The cost for online integration of heat exchanges due to radiation is found to be less than 15% of the baseline CHAD code and thus very manageable. The off-line view factor calculation is constructed to be very modular and has been completely integrated to read CHAD grid files and the output from this code can be read into the latest version of CHAD. Further integration has to be performed to accomplish the same with STAR-CD. The main outcome of this effort is to obtain a highly scalable and portable simulation capability to model view factors for underhood environment (for e.g. a view factor calculation which took 14 hours on a single processor only took 14 minutes on 64 processors). The code has also been validated using a simple test case where analytical solutions are available. This simulation capability gives underhood designers in the automotive companies the ability to account for thermal radiation - which usually is critical in the underhood environment and also turns out to be one of the most computationally expensive components of underhood simulations. This report starts off with the original work plan as elucidated in the proposal in section B. This is followed by Technical work plan to accomplish the goals of the project in section C. In section D, background to the current work is provided with references to the previous efforts this project leverages on. The results are discussed in section 1E. This report ends with conclusions and future scope of work in section F.

Pannala, S.; D'Azevedo, E.; Zacharia, T.

2002-02-26T23:59:59.000Z

154

3D modeling of effects of increased oxygenation and activity concentration in tumors treated with radionuclides and antiangiogenic drugs  

SciTech Connect

Purpose: Formation of new blood vessels (angiogenesis) in response to hypoxia is a fundamental event in the process of tumor growth and metastatic dissemination. However, abnormalities in tumor neovasculature often induce increased interstitial pressure (IP) and further reduce oxygenation (pO{sub 2}) of tumor cells. In radiotherapy, well-oxygenated tumors favor treatment. Antiangiogenic drugs may lower IP in the tumor, improving perfusion, pO{sub 2} and drug uptake, by reducing the number of malfunctioning vessels in the tissue. This study aims to create a model for quantifying the effects of altered pO{sub 2}-distribution due to antiangiogenic treatment in combination with radionuclide therapy. Methods: Based on experimental data, describing the effects of antiangiogenic agents on oxygenation of GlioblastomaMultiforme (GBM), a single cell based 3D model, including 10{sup 10} tumor cells, was developed, showing how radionuclide therapy response improves as tumor oxygenation approaches normal tissue levels. The nuclides studied were {sup 90}Y, {sup 131}I, {sup 177}Lu, and {sup 211}At. The absorbed dose levels required for a tumor control probability (TCP) of 0.990 are compared for three different log-normal pO{sub 2}-distributions: {mu}{sub 1} = 2.483, {sigma}{sub 1} = 0.711; {mu}{sub 2} = 2.946, {sigma}{sub 2} = 0.689; {mu}{sub 3} = 3.689, and {sigma}{sub 3} = 0.330. The normal tissue absorbed doses will, in turn, depend on this. These distributions were chosen to represent the expected oxygen levels in an untreated hypoxic tumor, a hypoxic tumor treated with an anti-VEGF agent, and in normal, fully-oxygenated tissue, respectively. The former two are fitted to experimental data. The geometric oxygen distributions are simulated using two different patterns: one Monte Carlo based and one radially increasing, while keeping the log-normal volumetric distributions intact. Oxygen and activity are distributed, according to the same pattern. Results: As tumor pO{sub 2} approaches normal tissue levels, the therapeutic effect is improved so that the normal tissue absorbed doses can be decreased by more than 95%, while retaining TCP, in the most favorable scenario and by up to about 80% with oxygen levels previously achieved in vivo, when the least favourable oxygenation case is used as starting point. The major difference occurs in poorly oxygenated cells. This is also where the pO{sub 2}-dependence of the oxygen enhancement ratio is maximal. Conclusions: Improved tumor oxygenation together with increased radionuclide uptake show great potential for optimising treatment strategies, leaving room for successive treatments, or lowering absorbed dose to normal tissues, due to increased tumor response. Further studies of the concomitant use of antiangiogenic drugs and radionuclide therapy therefore appear merited.

Lagerloef, Jakob H.; Kindblom, Jon; Bernhardt, Peter [Department of Radiation Physics, Goeteborg University, Goeteborg 41345 (Sweden); Department of Oncology, Sahlgrenska University Hospital, Goeteborg 41345 (Sweden); Department of Radiation Physics, Goeteborg University, Goeteborg, Sweden and Department of Nuclear Medicine, Sahlgrenska University Hospital, Goeteborg 41345 (Sweden)

2011-08-15T23:59:59.000Z

155

Joint watermarking and progressive geometric compression of 3D meshes  

Science Conference Proceedings (OSTI)

With the ever-increasing development of digital technologies and digital 3D models, the question of 3D mesh protection has becoming more and more important. One of the problems in digital watermarking is to decide how to embed in a 3D mesh as many bits ... Keywords: 3D compression, blind watermarking, dither modulation, semi-regular 3D meshes, wavelet transform

Ines Bouzidi; Azza Ouled Zaid; Meha Hachani; William Puech

2013-06-01T23:59:59.000Z

156

SHREC 2013 - Large Scale Sketch-Based 3D Shape ...  

Science Conference Proceedings (OSTI)

... It is also popular and important for related applications such as sketch-based modeling and recognition, as well as 3D animation production via 3D ...

157

Available Technologies: Integrated Profiling of 3D Cell ...  

Integrated Profiling of 3D Cell Culture Models and 3D Microscopy. 2013-177. ABSTRACT: Researchers at Berkeley Lab have developed a screening platform ...

158

Phenotypic transition maps of 3D breast acini obtained by imaging-guided agent-based modeling  

E-Print Network (OSTI)

USA We introduce an agent-based model of epithelial cellconditions. The agent-based model was parameterized andusing two- dimensional agent-based models (ABM). Rejniak and

Tang, Jonathan

2011-01-01T23:59:59.000Z

159

SummitView 1.0: a code to automatically generate 3D solid models of surface micro-machining based MEMS designs.  

Science Conference Proceedings (OSTI)

This report describes the SummitView 1.0 computer code developed at Sandia National Laboratories. SummitView is designed to generate a 3D solid model, amenable to visualization and meshing, that represents the end state of a microsystem fabrication process such as the SUMMiT (Sandia Ultra-Planar Multilevel MEMS Technology) V process. Functionally, SummitView performs essentially the same computational task as an earlier code called the 3D Geometry modeler [1]. However, because SummitView is based on 2D instead of 3D data structures and operations, it has significant speed and robustness advantages. As input it requires a definition of both the process itself and the collection of individual 2D masks created by the designer and associated with each of the process steps. The definition of the process is contained in a special process definition file [2] and the 2D masks are contained in MEM format files [3]. The code is written in C++ and consists of a set of classes and routines. The classes represent the geometric data and the SUMMiT V process steps. Classes are provided for the following process steps: Planar Deposition, Planar Etch, Conformal Deposition, Dry Etch, Wet Etch and Release Etch. SummitView is built upon the 2D Boolean library GBL-2D [4], and thus contains all of that library's functionality.

McBride, Cory L. (Elemental Technologies, American Fort, UT); Yarberry, Victor R.; Schmidt, Rodney Cannon; Meyers, Ray J. (Elemental Technologies, American Fort, UT)

2006-11-01T23:59:59.000Z

160

Satellite data assimilation and estimation of a 3D coastal sediment transport model using error-subspace emulators  

Science Conference Proceedings (OSTI)

This paper describes sequential assimilation of data into a three-dimensional coastal ocean model using fast and cheap statistical surrogates of the model (emulators). The model simulates resuspension and deposition of fine sediments in a macro-tidal ... Keywords: Coastal, Data assimilation, Emulator, Model, Remote sensing, Sediment transport

N. Margvelashvili; J. Andrewartha; M. Herzfeld; B. J. Robson; V. E. Brando

2013-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

FO3D: formatting objects for PDF3D  

Science Conference Proceedings (OSTI)

3D is useful in many real-world applications beyond computer games. The efficiency of communication is greatly enhanced by combining interlinked verbal descriptions with 3D content. However, there is a wide gap between the great demand for 3D content ... Keywords: PDF 3D, XSL-FO

Gerald Buchgraber; René Berndt; Sven Havemann; Dieter W. Fellner

2010-07-01T23:59:59.000Z

162

Improving Geologic and Engineering Models of Midcontinent Fracture and Karst-Modified Reservoirs Using New 3-D Seismic Attributes  

Science Conference Proceedings (OSTI)

Our project goal was to develop innovative seismic-based workflows for the incremental recovery of oil from karst-modified reservoirs within the onshore continental United States. Specific project objectives were: (1) to calibrate new multi-trace seismic attributes (volumetric curvature, in particular) for improved imaging of karst-modified reservoirs, (2) to develop attribute-based, cost-effective workflows to better characterize karst-modified carbonate reservoirs and fracture systems, and (3) to improve accuracy and predictiveness of resulting geomodels and reservoir simulations. In order to develop our workflows and validate our techniques, we conducted integrated studies of five karst-modified reservoirs in west Texas, Colorado, and Kansas. Our studies show that 3-D seismic volumetric curvature attributes have the ability to re-veal previously unknown features or provide enhanced visibility of karst and fracture features compared with other seismic analysis methods. Using these attributes, we recognize collapse features, solution-enlarged fractures, and geomorphologies that appear to be related to mature, cockpit landscapes. In four of our reservoir studies, volumetric curvature attributes appear to delineate reservoir compartment boundaries that impact production. The presence of these compartment boundaries was corroborated by reservoir simulations in two of the study areas. Based on our study results, we conclude that volumetric curvature attributes are valuable tools for mapping compartment boundaries in fracture- and karst-modified reservoirs, and we propose a best practices workflow for incorporating these attributes into reservoir characterization. When properly calibrated with geological and production data, these attributes can be used to predict the locations and sizes of undrained reservoir compartments. Technology transfer of our project work has been accomplished through presentations at professional society meetings, peer-reviewed publications, Kansas Geological Survey Open-file reports, Master's theses, and postings on the project website: http://www.kgs.ku.edu/SEISKARST.

Susan Nissen; Saibal Bhattacharya; W. Lynn Watney; John Doveton

2009-03-31T23:59:59.000Z

163

A Mixed Spectral Finite-Difference 3D Model of Neutral Planetary Boundary-Layer Flow over Topography  

Science Conference Proceedings (OSTI)

A simple three-dimensional linear model of planetary boundary-layer flow is developed based on the Mixed Spectral Finite-Difference model of Beljaars et al. using the full second-order turbulence closure of Launder et al. The model uses a steady-...

Keith W. Ayotte; Peter A. Taylor

1995-10-01T23:59:59.000Z

164

On Volume Based 3D Display Techniques  

Science Conference Proceedings (OSTI)

In the case of certain applications in which a need exists to visualize and interact with voluminous data sets and complex 3-D geometrical models, the conventional computer interface inhibits key human-computer interaction processes. Here, several deficiencies ... Keywords: 3-D Display, Cathode Ray Sphere, Computed Holography, Electroholography, Image Space, Static-Volume Display, Swept-Volume Display, Varifocal Display, Visualization, Volumetric Display

Barry G. Blundell

2011-10-01T23:59:59.000Z

165

3D Simulations in Environmental Impact Assessment  

Science Conference Proceedings (OSTI)

The increase of petrol cost and the failure of Kyoto agreement generated huge investments in renewable energy sources. In recent times a lot of local authorities allowed wind farm location. In many cases, environmental impact assessments do not take ... Keywords: 3D CAD models, 3D GIS analysis, Multimedia techniques, Viewshed, Visual impact assessment, Wind farm

Maria Danese; Giuseppe Las Casas; Beniamino Murgante

2008-06-01T23:59:59.000Z

166

Database development and 3D modeling of textural variations in heterogeneous, unconsolidated aquifer media: Application to the Milan plain  

Science Conference Proceedings (OSTI)

The textural and hydrogeologic properties of loose deposits are closely connected to the sedimentary processes occurring in fluvial and glacio-fluvial systems. The proposed procedure combines geologic knowledge, coded well data logs stored in a hydrogeologic ... Keywords: Hydrogeologic flow model, Hydrogeologic structural model, Stratigraphic data, Water wells

Tullia Bonomi

2009-01-01T23:59:59.000Z

167

Constraint-based 3D direct manipulations for intuitive and precise solid modelling in a virtual reality environment  

Science Conference Proceedings (OSTI)

The absence of constraints when interacting with virtual objects is one of the major limitations in the current Virtual Reality (VR) environments. Without constraints, it is difficult to perform precise interactive manipulations and precise solid modelling ... Keywords: allowable motions, constraint recognition, constraint solving, constraint-based manipulations, solid modelling, virtual reality

Y. Zhong; W. Müller-Wittig

2002-09-01T23:59:59.000Z

168

Molecular Modeling and Receptor-Dependent (RD) 3D-QSAR Approach to a Set of Antituberculosis Derivatives  

E-Print Network (OSTI)

in hydro- gen bonding energy upon binding. The model 8 is a nonlinear model, hence as high is the value. The independent variables (descriptors) are energy terms of a modified first-generation AMBER force field combined ligand solvation energy, the sum of electrostatic and hydrogen bonding energies of the unbound ligand

Ferreira, Márcia M. C.

169

AgentCubes: Incremental 3D end-user development  

Science Conference Proceedings (OSTI)

3D game development can be an enticing way to attract K-12 students to computer science, but designing and programming 3D games is far from trivial. Students need to achieve a certain level of 3D fluency in modeling, animation, and programming to be ... Keywords: Computational thinking, End-user development, Game design, IT fluency, Incremental 3D, Visual programming

Andri Ioannidou; Alexander Repenning; David C. Webb

2009-08-01T23:59:59.000Z

170

Operational implementation of the 1D+3D-Var assimilation method of radar reflectivity data in the AROME model  

Science Conference Proceedings (OSTI)

This paper presents results from radar reflectivity data assimilation experiments with the non-hydrostatic limited area model AROME (Application of Research to Operations at Mesoscale) in an operational context. A one-dimensional (1D) Bayesian ...

Eric Wattrelot; Olivier Caumont; Jean-François Mahfouf

171

Data Assimilation by Optimal Control Method in a 3D Coastal Oceanic Model: The Problem of Discretization  

Science Conference Proceedings (OSTI)

A methodology to proceed from the continuous to the discrete formulation of a control problem is described. The aim of a boundary control procedure is to identify boundary forcing to ensure the best fit between data and model results by ...

Jean-Michel Lellouche; Jean-Luc Devenon; Ivan Dekeyser

1998-04-01T23:59:59.000Z

172

Application of a New Adjoint Newton Algorithm to the 3D ARPS Storm-Scale Model Using Simulated Data  

Science Conference Proceedings (OSTI)

The adjoint Newton algorithm (ANA) is based on the first- and second-order adjoint techniques allowing one to obtain the “Newton line search direction” by integrating a “tangent linear model” backward in time (with negative time steps). Moreover, ...

Zhi Wang; Kelvin K. Droegemeier; L. White; I. M. Navon

1997-10-01T23:59:59.000Z

173

paNTICA: A Fast 3D Radiative Transfer Scheme to Calculate Surface Solar Irradiance for NWP and LES Models  

Science Conference Proceedings (OSTI)

The resolution of numerical weather prediction models is constantly increasing, making it necessary to consider three-dimensional radiative transfer effects such as cloud shadows cast into neighboring grid cells and thus affecting radiative ...

Ulrike Wissmeier; Robert Buras; Bernhard Mayer

2013-08-01T23:59:59.000Z

174

3D Nanostructured Bicontinuous Electrodes: Path to Ultra-High ...  

Science Conference Proceedings (OSTI)

3D Nanostructured Bicontinuous Electrodes: Path to Ultra-High Power and Energy ... High Energy Density Lithium Capacitors Using Carbon-Carbon Electrodes.

175

3D thermal-aware floorplanner using a MOEA approximation  

Science Conference Proceedings (OSTI)

Two of the major concerns in 3D stacked technology are heat removal and power density distribution. In our work, we propose a novel 3D thermal-aware floorplanner. Our contributions include:1.A novel multi-objective formulation to consider the thermal ... Keywords: 3D architecture, Evolutionary algorithm, Hot spots, Reliability, Temperature, Thermal-aware floorplan, Through silicon vias optimization

David Cuesta; José L. Risco-Martin; José L. Ayala; J. Ignacio Hidalgo

2013-01-01T23:59:59.000Z

176

A non-CFD modeling system for computing 3D wind and concentration fields in urban environments  

SciTech Connect

The Quick Urban & Industrial Complex (QUIC) Dispersion Modeling System has been developed to rapidly compute the transport and dispersion of toxic agent releases in the vicinity of buildings. It is composed of an empirical-diagnostic wind solver, an 'urbanized' Lagrangian random-walk model, and a graphical user interface. The code has been used for homeland security and environmental air pollution applications. In this paper, we discuss the wind solver methodology and improvements made to the original Roeckle schemes in order to better capture flow fields in dense built-up areas. The mode1-computed wind and concentration fields are then compared to measurements from several field experiments. Improvements to the QUIC Dispersion Modeling System have been made to account for the inhomogeneous and complex building layouts found in large cities. The logic that has been introduced into the code is described and comparisons of model output to full-scale outdoor urban measurements in Oklahoma City and New York City are given. Although far from perfect, the model agreed fairly well with measurements and in many cases performed equally to CFD codes.

Nelson, Matthew A [Los Alamos National Laboratory; Brown, Michael J [Los Alamos National Laboratory; Williams, Michael D [Los Alamos National Laboratory; Gowardhan, Akshay [Los Alamos National Laboratory; Pardyjak, Eric R [UNIV OF UTAH

2010-01-01T23:59:59.000Z

177

A 3D partial-equilibrium model to simulate coupled hydrogeological, microbiological, and geochemical processes in subsurface systems  

E-Print Network (OSTI)

of models following either the equilibrium [e.g., Walter et al., 1994; Yeh and Tripathi, 1989; Steefel, vi is the pore water velocity in the i-th direction, f denotes the porosity, qsk is the volumetric flux of water per unit volume of the aquifer (source/sink) and Csk is the concentration of the source

178

Virtual Construction: Linking the 3D Model of the AP600 Nuclear Plant Design To its Construction Schedule  

Science Conference Proceedings (OSTI)

This report documents the results of an eight-month virtual construction study performed by Westinghouse for EPRI. Westinghouse performed this study as part of EPRI's interest in advancing the use of computer-aided processes to reduce the cost of nuclear power plants. EPRI believed that if one could relate appropriate portions of an advanced light water reactor plant design model to activities in its construction sequence and this relationship could be portrayed visually, then optimization of the constru...

2000-06-27T23:59:59.000Z

179

X3D: Extensible 3D Graphics for Web Authors  

Science Conference Proceedings (OSTI)

In the early days of the Web a need was recognized for a language to display 3D objects through a browser. An HTML-like language, VRML, was proposed in 1994 and became the standard for describing interactive 3D objects and worlds on the Web. 3D Web courses ... Keywords: Computer Graphics

Don Brutzman; Leonard Daly

2007-04-01T23:59:59.000Z

180

The Effects of Low Dose Irradiation on Inflammatory Response Proteins in a 3D Reconstituted Human Skin Tissue Model  

Science Conference Proceedings (OSTI)

Skin responses to moderate and high doses of ionizing radiation include the induction of DNA repair, apoptosis, and stress response pathways. Additionally, numerous studies indicate that radiation exposure leads to inflammatory responses in skin cells and tissue. However, the inflammatory response of skin tissue to low dose radiation (<10 cGy) is poorly understood. In order to address this, we have utilized a reconstituted human skin tissue model (MatTek EpiDerm FT) and assessed changes in 23 cytokines twenty-four and forty eight hours following treatment of skin with either 3 or 10 cGy low-dose of radiation. Three cytokines, IFN-?, IL-2, MIP-1?, were significantly altered in response to low dose radiation. In contrast, seven cytokines were significantly altered in response to a high radiation dose of 200 cGy (IL-2, IL-10, IL-13, IFN-?, MIP-1?, TNF ?, and VEGF) or the tumor promoter 12-O-tetradecanoylphorbol 13-acetate (G-CSF, GM-CSF, IL-1?, IL-8, MIP-1?, MIP-1?, RANTES). Additionally, radiation induced inflammation appears to have a distinct cytokine response relative to the non-radiation induced stressor, TPA. Overall, these results indicate that there are subtle changes in the inflammatory protein levels following exposure to low dose radiation and this response is a sub-set of what is seen following a high dose in a human skin tissue model.

Varnum, Susan M.; Springer, David L.; Chaffee, Mary E.; Lien, Katie A.; Webb-Robertson, Bobbie-Jo M.; Waters, Katrina M.; Sacksteder, Colette A.

2012-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

3D in Web Pages  

Science Conference Proceedings (OSTI)

3D in Web Pages. This page is currently under construction! Return to Visualization. *. Bookmark and Share. Return to Visualization.

2011-12-05T23:59:59.000Z

182

Stereoscopic 3D line drawing  

Science Conference Proceedings (OSTI)

This paper discusses stereoscopic 3D imaging based on line drawing of 3D shapes. We describe the major issues and challenges in generating stereoscopic 3D effects using lines only, with a couple of relatively simple approaches called each-eye-based and ... Keywords: binocular rivalry, line drawing, line stylization, non-photorealism, stereo coherence, stereoscopy

Yongjin Kim; Yunjin Lee; Henry Kang; Seungyong Lee

2013-07-01T23:59:59.000Z

183

Convergence of Ginzburg-Landau functionals in 3-d superconductivity  

E-Print Network (OSTI)

In this paper we consider the asymptotic behavior of the Ginzburg- Landau model for superconductivity in 3-d, in various energy regimes. We rigorously derive, through an analysis via {\\Gamma}-convergence, a reduced model for the vortex density, and we deduce a curvature equation for the vortex lines. In a companion paper, we describe further applications to superconductivity and superfluidity, such as general expressions for the first critical magnetic field H_{c1}, and the critical angular velocity of rotating Bose-Einstein condensates.

Sisto Baldo; Robert L. Jerrard; Giandomenico Orlandi; Mete Soner

2011-02-23T23:59:59.000Z

184

3D Relativistic SPH  

E-Print Network (OSTI)

In this paper we present the equations and some basic applications of relativistic SPH. The equations are generated under the assumption that there are no interaction terms between the fluid modelled and the background space-time, i.e. we are neglecting the perturbations to the metric produced by the modelled fluid. This corresponds to a stationary metric, which for this work, we further limit to be static as well. The equations use a new signal velocity term and artificial viscosity to smear out the effects of strong shocks and are tested here against Newtonian and relativistic shocks.

Stuart Muir; Joe Monaghan

2003-12-11T23:59:59.000Z

185

Reconstructing 3D buildings from Lidar data  

E-Print Network (OSTI)

Accurate 3D surface models in urban areas are essential for a variety of applications, such as visualization, GIS, and mobile communications. Since manual surface reconstruction is very costly and time consuming, the development of automated algorithms is of great importance. On the other hand LIDAR data is a relatively new technology for obtaining Digital Surface Models (DSM) of the earth’s surface. It is a fast method for sampling the earth’s surface with a high density and high point accuracy. In this paper a new approach for building extraction from LIDAR data is presented. The approach utilizes the geometric properties of urban buildings for the reconstruction of the building wire-frames from the LIDAR data. We start by finding the candidate building points that are used to populate a plane parameter space. After filling the plane parameter space, we find the planes that can represent the building roof surfaces. Roof regions are then extracted and the plane parameters are refined using a robust estimation technique and the geometric constraint between adjacent roof facets. The region boundaries are extracted and used to form the building wireframes. The algorithm is tested on two buildings from a locally acquired LIDAR data sets. The test results show some success in extracting urban area buildings. 1.

Ahmed F. Elaksher; James S. Bethel

2002-01-01T23:59:59.000Z

186

Alignment of Continuous Video onto 3D Point Clouds  

Science Conference Proceedings (OSTI)

We propose a general framework for aligning continuous (oblique) video onto 3D sensor data. We align a point cloud computed from the video onto the point cloud directly obtained from a 3D sensor. This is in contrast to existing techniques where the 2D ... Keywords: Index Terms- Alignment, pose estimation, motion stereo, range data, sensor fusion, 3D model and visualization.

Wenyi Zhao; David Nister; Steve Hsu

2005-08-01T23:59:59.000Z

187

Blender 3D Architecture, Buildings, and Scenery  

Science Conference Proceedings (OSTI)

DETAIL This book will show you how to create realistic architectural models in Blender. Blender is an open-source 3D animation program released as free software. It can be used for modeling, texturing, skinning, animating, and so on. It runs on all the ...

Allan Brito

2008-06-01T23:59:59.000Z

188

Modeling Nuclear Pasta and the Transition to Uniform Nuclear Matter with the 3D Skyrme-Hartree-Fock Method at Finite Temperature I: Core-Collapse Supernovae  

E-Print Network (OSTI)

The first results of a new three-dimensional, finite temperature Skyrme-Hartree-Fock+BCS study of the properties of inhomogeneous nuclear matter at densities and temperatures leading to the transition to uniform nuclear matter are presented. Calculations are carried out in a cubic box representing a unit cell of the locally periodic structure of the matter. A constraint is placed on the two independent components of the quadrupole moment of the neutron density in order to investigate the dependence of the total energy-density of matter on the geometry of the nuclear structure in the unit cell. This approach allows self-consistent modeling of effects such as (i) neutron drip, resulting in a neutron gas external to the nuclear structure, (ii) shell effects of bound and unbound nucleons, (iii) the variety of exotic nuclear shapes that emerge, collectively termed `nuclear pasta' and (iv) the dissolution of these structures into uniform nuclear matter as density and/or temperature increase. In part I of this work ...

Stone, W G Newton J R

2009-01-01T23:59:59.000Z

189

Application of system dynamics, GIS and 3D visualization in a study of residential sustainability  

Science Conference Proceedings (OSTI)

Constructing and improving urban residential areas is an eternal critical subject in the process of the whole urban development which is connected with a series of challenges and problems. In this paper, firstly DPSIR (Driving Forces-Pressure-State-Impact-Response) ... Keywords: 3D visualization, GIS, cityengine, density map, residential areas, sustainability, system dynamics model

Zhao Xu; Volker Coors

2011-06-01T23:59:59.000Z

190

Reprint of "3D geological modelling from boreholes, cross-sections and geological maps, application over former natural gas storages in coal mines" [Comput. Geosci. 34 (2008) 278-290  

Science Conference Proceedings (OSTI)

In a wide range of applications involving geological modelling, geological data available at low cost usually consist of documents such as cross-sections or geological maps and punctual data like borehole logs or outcrop descriptions. In order to build ... Keywords: 3D geological modelling, Data structuration, GIS, Geomodeler

Olivier Kaufmann; Thierry Martin

2009-01-01T23:59:59.000Z

191

Modeling Nuclear Pasta and the Transition to Uniform Nuclear Matter with the 3D Skyrme-Hartree-Fock Method at Finite Temperature I: Core-Collapse Supernovae  

E-Print Network (OSTI)

The first results of a new three-dimensional, finite temperature Skyrme-Hartree-Fock+BCS study of the properties of inhomogeneous nuclear matter at densities and temperatures leading to the transition to uniform nuclear matter are presented. Calculations are carried out in a cubic box representing a unit cell of the locally periodic structure of the matter. A constraint is placed on the two independent components of the quadrupole moment of the neutron density in order to investigate the dependence of the total energy-density of matter on the geometry of the nuclear structure in the unit cell. This approach allows self-consistent modeling of effects such as (i) neutron drip, resulting in a neutron gas external to the nuclear structure, (ii) shell effects of bound and unbound nucleons, (iii) the variety of exotic nuclear shapes that emerge, collectively termed `nuclear pasta' and (iv) the dissolution of these structures into uniform nuclear matter as density and/or temperature increase. In part I of this work the calculation of the properties of inhomogeneous nuclear matter in the core collapse of massive stars is reported. Calculations are performed at baryon number densities of $n_{\\rm b}$ = 0.04 - 0.12 fm$^{\\rm -3}$, a proton fraction of $y_{\\rm p}=0.3$ and temperatures in the range 0 - 7.5 MeV. A wide variety of nuclear shapes are shown to emerge. It is suggested that thermodynamical properties change smoothly in the pasta regime up to the transition to uniform matter; at that transition, thermodynamic properties of the matter vary discontinuously.

W. G. Newton J. R. Stone

2009-04-30T23:59:59.000Z

192

Joint stochastic inversion of 3D pre-stack seismic data and well logs for high-resolution reservoir characterization and petrophysical modeling: application to deepwater hydrocarbon  

E-Print Network (OSTI)

Joint stochastic inversion of 3D pre-stack seismic data and well logs for high-resolution reservoir describes a novel algorithm for the joint stochastic inversion of well logs and multiple angle stacks, and M50, with M-40 being the reservoir with the highest hydrocarbon production. M-10 M-40 M-50 #12;Joint

Torres-Verdín, Carlos

193

Quantifying fluid distribution and phase connectivity with a simple 3D cubic pore network model constrained by NMR and MICP data  

Science Conference Proceedings (OSTI)

A computer algorithm is implemented to construct 3D cubic pore networks that simultaneously honor nuclear magnetic resonance (NMR) and mercury injection capillary pressure (MICP) measurements on core samples. The algorithm uses discretized pore-body ... Keywords: Fluid distribution, Invasion percolation, Mercury injection capillary pressure, Nuclear magnetic resonance, Pore network, Relative permeability, Tight-gas sandstone

Chicheng Xu, Carlos Torres-Verdín

2013-12-01T23:59:59.000Z

194

The Simulation of a Convective Cloud in a 3-D Model With Explicit Microphysics. Part I: Model Description and Sensitivity Experiments  

Science Conference Proceedings (OSTI)

A three-dimensional nonhydrostatic anelastic numerical model of a convective cloud with an explicit description of microphysical processes has been developed. Two distribution functions are considered in the model—one for cloud condensation ...

Yefim L. Kogan

1991-05-01T23:59:59.000Z

195

Determining Greenland Ice Sheet sensitivity to regional climate change: one-way coupling of a 3-D thermo-mechanical ice sheet model with a mesoscale climate model  

E-Print Network (OSTI)

responsible almost 40% of the ice sheet’s total dischargeCurrently, no coupled Greenland Ice Sheet model experimentaccelerated melting of Greenland ice sheet, Science, v. 313,

Schlegel, Nicole-Jeanne

2011-01-01T23:59:59.000Z

196

Method for inverting reflection trace data from 3-D and 4-D seismic surveys and identifying subsurface fluid and pathways in and among hydrocarbon reservoirs based on impedance models  

DOE Patents (OSTI)

A method is disclosed for inverting 3-D seismic reflection data obtained from seismic surveys to derive impedance models for a subsurface region, and for inversion of multiple 3-D seismic surveys (i.e., 4-D seismic surveys) of the same subsurface volume, separated in time to allow for dynamic fluid migration, such that small scale structure and regions of fluid and dynamic fluid flow within the subsurface volume being studied can be identified. The method allows for the mapping and quantification of available hydrocarbons within a reservoir and is thus useful for hydrocarbon prospecting and reservoir management. An iterative seismic inversion scheme constrained by actual well log data which uses a time/depth dependent seismic source function is employed to derive impedance models from 3-D and 4-D seismic datasets. The impedance values can be region grown to better isolate the low impedance hydrocarbon bearing regions. Impedance data derived from multiple 3-D seismic surveys of the same volume can be compared to identify regions of dynamic evolution and bypassed pay. Effective Oil Saturation or net oil thickness can also be derived from the impedance data and used for quantitative assessment of prospective drilling targets and reservoir management. 20 figs.

He, W.; Anderson, R.N.

1998-08-25T23:59:59.000Z

197

Method for inverting reflection trace data from 3-D and 4-D seismic surveys and identifying subsurface fluid and pathways in and among hydrocarbon reservoirs based on impedance models  

DOE Patents (OSTI)

A method is disclosed for inverting 3-D seismic reflection data obtained from seismic surveys to derive impedance models for a subsurface region, and for inversion of multiple 3-D seismic surveys (i.e., 4-D seismic surveys) of the same subsurface volume, separated in time to allow for dynamic fluid migration, such that small scale structure and regions of fluid and dynamic fluid flow within the subsurface volume being studied can be identified. The method allows for the mapping and quantification of available hydrocarbons within a reservoir and is thus useful for hydrocarbon prospecting and reservoir management. An iterative seismic inversion scheme constrained by actual well log data which uses a time/depth dependent seismic source function is employed to derive impedance models from 3-D and 4-D seismic datasets. The impedance values can be region grown to better isolate the low impedance hydrocarbon bearing regions. Impedance data derived from multiple 3-D seismic surveys of the same volume can be compared to identify regions of dynamic evolution and bypassed pay. Effective Oil Saturation or net oil thickness can also be derived from the impedance data and used for quantitative assessment of prospective drilling targets and reservoir management.

He, Wei (New Milford, NJ); Anderson, Roger N. (New York, NY)

1998-01-01T23:59:59.000Z

198

Stokes imaging of AM Her systems using 3D inhomogeneous models-II. Modelling X-ray and optical data of CP Tucanae  

E-Print Network (OSTI)

The viewing geometry of the polar CP Tuc that better explains its optical and X-ray light curves is controversial. Previous modelling of white-light polarimetric data considered the partial self-eclipse of an extended inhomogeneous emitting region. Alternatively, phase-dependent absorption has been used to reproduce the X-ray data. This paper presents new optical polarimetric data of CP Tuc and a model that consistently explains its optical and X-ray data. The model was based on an extension of the CYCLOPS code that added X-ray bremsstrahlung emission and pre-shock region absorption to the original version, which only accounted for cyclotron emission. The new code creates the possibility of simultaneous optical and X-ray fitting. We show that self-eclipse and absorption data have distinct signatures on the X-ray spectra. Although we were able to reasonably fit the CP Tuc optical data to cases of absorption and self-eclipse, we were only able to reproduce the X-ray orbital modulation after considering the abso...

Silva, K M G; Costa, J E R; de Souza, C A; Cieslinski, D; Hickel, G R

2013-01-01T23:59:59.000Z

199

3D Arm Motion Tracking for Home-based Rehabilitation  

E-Print Network (OSTI)

Chapter 13 3D Arm Motion Tracking for Home-based Rehabilitation Y. Tao and H. Hu 13.1 Introduction This paper presents a real-time hybrid solution to articulated 3D arm motion tracking for home-based of articulated objects, e.g., human upper limbs. The purpose is to develop a 3D motion tracking model for home-based

Hu, Huosheng

200

FRAMES-2.0 Software System: Linking to the Groundwater Modeling System (GMS) RT3D and MT3DMS Models  

SciTech Connect

Linkages to the Groundwater Modeling System have been developed at Pacific Northwest National Laboratory to enable the Nuclear Regulatory Commission (NRC) to more realistically assess the risk to the public of radioactive contaminants at NRC-licensed sites. Common software tools presently in use are limited in that they cannot assess contaminant migration through complex natural environments. The purpose of this initiative is to provide NRC with a licensing safety-analysis tool with sufficient power, flexibility, and utility that it can serve as the primary software platform for analyzing the hazards associated with licensing actions at those “complex” sites at which the traditional tools are inappropriate. As a tool designed to realistically approximate prospective doses to the public, this initiative addresses NRC’s safety-performance goal by confirming that licensing actions do not result in undue risk to the public.

Whelan, Gene; Castleton, Karl J.; Pelton, Mitch A.

2007-08-08T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

3D Materials Science 2014: Technical Program  

Science Conference Proceedings (OSTI)

Experimental techniques for 3D data acquisition; Advances in reconstruction algorithms; Image processing and digital representation of 2D and 3D ...

202

3D Materials Science 2014: Home Page  

Science Conference Proceedings (OSTI)

2nd International Congress on 3D Materials Science 2014. June 29 – July 2, 2014 • Annecy, France. The International Congress on 3D Materials Science seeks ...

203

Third-space architecture for learning in 3D  

Science Conference Proceedings (OSTI)

Learning can be increasingly untethered to home, work or school spaces by means of integrative cloud services coupled with 3D worlds, and mobile, collaboratively driven use of digital "third space." A 3rd-space, portable and modular design ... Keywords: learning in 3D, model-based reasoning, virtual environments, visual simulation

Andrew G. Stricker; Kimberly-Combs Hardy; Elizabeth S. Stricker; Toni A. Scribner; John A. Cook; Cynthia A. Calongne; Kathryn L. Flitter; Fil J. Arenas

2011-04-01T23:59:59.000Z

204

3D Reconstruction from Multiple Images Part 1: Principles  

Science Conference Proceedings (OSTI)

This issue discusses methods to extract three-dimensional (3D) models from plain images. In particular, the 3D information is obtained from images for which the camera parameters are unknown. The principles underlying such uncalibrated structure-from-motion ...

Theo Moons; Luc Van Gool; Maarten Vergauwen

2010-04-01T23:59:59.000Z

205

Dynamical instabilities in density-dependent hadronic relativistic models  

Science Conference Proceedings (OSTI)

Unstable modes in asymmetric nuclear matter (ANM) at subsaturation densities are studied in the framework of relativistic mean-field density-dependent hadron models. The size of the instabilities that drive the system are calculated and a comparison with results obtained within the nonlinear Walecka model is presented. The distillation and antidistillation effects are discussed.

Santos, A. M.; Brito, L.; Providencia, C. [Centro de Fisica Teorica, Department of Physics, University of Coimbra, P-3004-516 Coimbra (Portugal)

2008-04-15T23:59:59.000Z

206

CSY3019 -Graphics Programming Assignment 2: Development of 2D/3D graphics software: Java 3D (50%)  

E-Print Network (OSTI)

CSY3019 - Graphics Programming Assignment 2: Development of 2D/3D graphics software: Java 3D (50, directional, point and spot lighting (to model windows and/or strip lights). · User defined or loaded geometry. Front Sheet & Title Page · Table of contents · Introduction · Analysis · Design · Implementation

Hill, Gary

207

Statistical methods for 2D-3D registration of optical and LIDAR images  

E-Print Network (OSTI)

Fusion of 3D laser radar (LIDAR) imagery and aerial optical imagery is an efficient method for constructing 3D virtual reality models. One difficult aspect of creating such models is registering the optical image with the ...

Mastin, Dana Andrew

2009-01-01T23:59:59.000Z

208

Visualising Memory Graphs: Interactive Debugging using Java3D  

E-Print Network (OSTI)

that three dimensional visualisation cau be a useful tool for debugging, program analysis, and a viable - 3D Modelling in Java 6 3 Requirements 9 4 Design 10 4.1 Preliminaries 10 4.1.1 Creating

Oxford, University of

209

3D Graphics for Everyday Communication Takeo Igarashi  

E-Print Network (OSTI)

the region surrounded by the silhouette, making wide areas fat and narrow areas thin. Teddy, our prototype implemented using standard 3D rendering engines, and the painted models are stored as standard textured

Igarashi, Takeo

210

Topobo : a 3-D constructive assembly system with kinetic memory  

E-Print Network (OSTI)

We introduce Topobo, a 3-D constructive assembly system em- bedded with kinetic memory, the ability to record and playback physical motion. Unique among modeling systems is Topobo's coincident physical input and output ...

Raffle, Hayes Solos, 1974-

2004-01-01T23:59:59.000Z

211

Fixed-outline thermal-aware 3D floorplanning  

Science Conference Proceedings (OSTI)

In this paper, we present a novel algorithm for 3D floorplanning with fixed outline constraints and a particular emphasis on thermal awareness. A computationally efficient thermal model that can be used to guide the thermal-aware floorplanning algorithm ...

Linfu Xiao; Subarna Sinha; Jingyu Xu; Evangeline F. Y. Young

2010-01-01T23:59:59.000Z

212

3D Materials Science 2014: Home Page  

Science Conference Proceedings (OSTI)

The International Congress on 3D Materials Science seeks to provide the ... assess the state-of-the-art within the various elements of 3D materials science, but to ...

213

High throughput 3-D tissue cytometry  

E-Print Network (OSTI)

This thesis presents the ongoing technological development of high throughput 3-D tissue cytometry.and its applications in biomedicine. 3-D tissue cytometry has been developed in our laboratory based on two-photon microscopy ...

Kwon, Hyuk-Sang, 1971-

2007-01-01T23:59:59.000Z

214

A view-sequential 3D display  

E-Print Network (OSTI)

This thesis outlines the various techniques for creating electronic 3D displays and analyzes their commercial potential. The thesis argues for the use of view-sequential techniques in the design of 3D displays based on ...

Cossairt, Oliver S. (Oliver Strider), 1978-

2003-01-01T23:59:59.000Z

215

3D Shape Searching for Manufacturing Apps.  

Science Conference Proceedings (OSTI)

3D Shape Searching for Manufacturing Applications. Principal Investigator: Afzal Godil (301) 975-4262 afzal.godil@nist.gov. ...

2010-10-05T23:59:59.000Z

216

3-D Space as New Frontier  

Science Conference Proceedings (OSTI)

... of an MP3 song file. And artists are experimenting with creating unconventional 3-D works. Adding a spatial dimension ...

217

3D primitive reconstruction using the line segment with single image  

Science Conference Proceedings (OSTI)

This paper presents a 3-D reconstruction method IBM(image based modeling) of an image that does not contain any camera information. This system adopts a 3D reconstruction method based on a model. Model-based 3D reconstruction recovers an image using ...

Sung-Dong Cho; Seung-Taek Ryoo; Tai-Ho Choi; Kyung-Hyun Yoon

2003-05-01T23:59:59.000Z

218

The capture and dissemination of integrated 3D geospatial knowledge at the British Geological Survey using GSI3D software and methodology  

Science Conference Proceedings (OSTI)

The Geological Surveying and Investigation in 3 Dimensions (GSI3D) software tool and methodology has been developed over the last 15 years. Since 2001 this has been in cooperation with the British Geological Survey (BGS). To-date over a hundred BGS geologists ... Keywords: 3D geological modelling, 3D visualisation, Geoscience education, Knowledge capture, Systematic geological surveying

Holger Kessler; Steve Mathers; Hans-Georg Sobisch

2009-06-01T23:59:59.000Z

219

The Simulation of a Convective Cloud in a 3D Model with Explicit Microphysics. Part II: Dynamical and Microphysical Aspects of Cloud Merger  

Science Conference Proceedings (OSTI)

The development and merger of pairs of convective clouds in a shear-free environment were simulated in an explicit microphysical cloud model. The occurrence or nonoccurrence of updraft merger and the timing of merger depended critically on the ...

Yefim L. Kogan; Alan Shapiro

1996-09-01T23:59:59.000Z

220

Ensemble Simulation of the Lightning Flash Variability in a 3D Cloud Model with Parameterizations of Cloud Electrification and Lightning Flashes  

Science Conference Proceedings (OSTI)

A series of ensemble simulations were performed to study the statistics of flash characteristics produced by an electrification and lightning scheme in the cloud-resolving model Méso-NH. Here, the electrical variability of two storms—one ...

Jean-Pierre Pinty; Christelle Barthe

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

Addressing thermal and power delivery bottlenecks in 3D circuits  

Science Conference Proceedings (OSTI)

The enhanced packing densities facilitated by 3D integrated circuit technology also has an unwanted side-effect, in the form of increasing the amount of current per unit footprint of the chip, as compared to a 2D design. This has ramifications on two ...

Sachin S. Sapatnekar

2009-01-01T23:59:59.000Z

222

Building a geodatabase for mapping hydrogeological features and 3D modeling of groundwater systems: Application to the Saguenay-Lac-St.-Jean region, Canada  

Science Conference Proceedings (OSTI)

Understanding and managing groundwater resources require the integration of a large amount of high-quality data from a variety of sources. Due to the limitations in accessing information related to groundwater and subsurface conditions, the gathering ... Keywords: Arc Hydro Groundwater, ArcGIS, Hydrogeology, Hydrostructural modeling, Spatial database

Romain Chesnaux; Mélanie Lambert; Julien Walter; Ugo Fillastre; Murray Hay; Alain Rouleau; Réal Daigneault; Annie Moisan; Denis Germaneau

2011-11-01T23:59:59.000Z

223

Brief description of image based 3D face recognition methods  

Science Conference Proceedings (OSTI)

The goal of this paper is to presents Brief Description of literature on Image Based human and machine recognition of faces during 1987 to 2010. Machine recognition of faces has several applications. As one of the most successful applications of image ... Keywords: 3D Face Recognition, 3D Morphable Model, Categorization, Face Detection, Face Recognition from Image Sequences, Independent Component Analysis, Linear Discriminate Analysis, Principal Component Analysis, Video based face recognition, research Issues

Sushma Jaiswal; Sarita Singh Bhadauria; Rakesh Singh Jadon; Tarun Kumar Divakar

2010-12-01T23:59:59.000Z

224

Modeling the steady-state ISV (in situ vitrification) process: A 3-D finite element analysis of coupled thermal-electric fields  

Science Conference Proceedings (OSTI)

Steady-state modeling considerations for simulating the in situ vitrification (ISV) process are documented based upon the finite element numerical approach. Recommendations regarding boundary condition specifications and mesh discretization are presented. The effects of several parameters on the ISV process response are calculated and the results discussed. The parameters investigated include: (1) electrode depth, (2) ambient temperature, (3) supplied current, (4) electrical conductivity, (5) electrode separation, and (6) soil/waste characterization. 13 refs., 29 figs., 1 tab.

Langerman, M.A.

1990-09-01T23:59:59.000Z

225

Ice Formation in Arctic Mixed-Phase Clouds: Insights from a 3-D Cloud-Resolving Model with Size-Resolved Aerosol and Cloud Microphysics  

SciTech Connect

The single-layer mixed-phase clouds observed during the Atmospheric Radiation Measurement (ARM) program’s Mixed-Phase Arctic Cloud Experiment (MPACE) are simulated with a 3-dimensional cloud-resolving model the System for Atmospheric Modeling (SAM) coupled with an explicit bin microphysics scheme and a radar-lidar simulator. Two possible ice enhancement mechanisms – activation of droplet evaporation residues by condensation-followed-by-freezing and droplet freezing by contact freezing inside-out, are scrutinized by extensive comparisons with aircraft and radar and lidar measurements. The locations of ice initiation associated with each mechanism and the role of ice nuclei (IN) in the evolution of mixed-phase clouds are mainly addressed. Simulations with either mechanism agree well with the in-situ and remote sensing measurements on ice microphysical properties but liquid water content is slightly underpredicted. These two mechanisms give very similar cloud microphysical, macrophysical, dynamical, and radiative properties, although the ice nucleation properties (rate, frequency and location) are completely different. Ice nucleation from activation of evaporation nuclei is most efficient near cloud top areas concentrated on the edges of updrafts, while ice initiation from the drop freezing process has no significant location preference (occurs anywhere that droplet evaporation is significant). Both enhanced nucleation mechanisms contribute dramatically to ice formation with ice particle concentration of 10-15 times higher relative to the simulation without either of them. The contribution of ice nuclei (IN) recycling from ice particle evaporation to IN and ice particle concentration is found to be very significant in this case. Cloud can be very sensitive to IN initially and form a nonquilibrium transition condition, but become much less sensitive as cloud evolves to a steady mixed-phase condition. The parameterization of Meyers et al. [1992] with the observed MPACE IN concentration is able to predict the observed mixed-phase clouds reasonably well. This validation may facilitate the application of this parameterization in the cloud and climate models to simulate Arctic clouds.

Fan, Jiwen; Ovtchinnikov, Mikhail; Comstock, Jennifer M.; McFarlane, Sally A.; Khain, Alexander

2009-02-27T23:59:59.000Z

226

Parity Dependent Shell Model Level Densities for Nuclear Astrophysics  

E-Print Network (OSTI)

Recently, we developed a methodology [1-4] of calculating the spin and parity dependent shell model nuclear level density, which is a very useful ingredient in the Huaser-Feshbach theory for calculating reaction rates for nuclear astrophysics[5]. We developed new techniques based on nuclear statistical spectroscopy [6] to calculate the spin and parity projected moments of the nuclear shell model Hamiltonian, that can be further used to obtain an accurate description of the nuclear level density up to about 15 MeV excitation energy. These techniques were fully tested for the sd-shell nuclei and some light f p-shell nuclei, by comparing with the level density obtained from exact shell model diagonalization. Here we present for the first time comparisons with the exact shell model diagonalization for nuclei heavier than 56 Ni, in a model space spanned by the f 5/2, p 3/2, p 1/2 and g 9/2 orbits. The ratio of nuclear level densities of opposite parities is also discussed. This analysis was possible due to a new and very efficient nuclear shell model code [7] that can provide a large number of states of given spin and parity. PoS(NIC X)132

Mike Scott; Mihai Horoi; Mike Scott

2008-01-01T23:59:59.000Z

227

DENSITY  

Science Conference Proceedings (OSTI)

... Table 2: Principal mineral phases found in the granite rock. Mineral phase. ... Table 4. Average density of 12 granite rocks by Archimedes and CT. ...

2007-01-08T23:59:59.000Z

228

Illuminating clay: a 3-D tangible interface for landscape analysis  

Science Conference Proceedings (OSTI)

This paper describes a novel system for the real-time computational analysis of landscape models. Users of the system - called Illuminating Clay - alter the topography of a clay landscape model while the changing geometry is captured in real-time by ... Keywords: 3D laser scanner, DEM, GIS, landscape design, physical models, tangible user interface

Ben Piper; Carlo Ratti; Hiroshi Ishii

2002-04-01T23:59:59.000Z

229

VISUALS: 3-D Animation of Dislocation Glide  

Science Conference Proceedings (OSTI)

Feb 12, 2007 ... Animation of edge-screw dislocation glide. Citation: van der Pluijm, Ben. "3-D Animation of Dislocation Glide." Teach the Earth: The SERC ...

230

Thermobonded 3D Nonwoven Wool Structures.  

E-Print Network (OSTI)

??The aims of this study were to form uncompressed thermobonded 3D wool nonwoven shell structures in one continuous process, and to study the controlling factors… (more)

Nassar, Khaled Mansour Abd el hafez

2010-01-01T23:59:59.000Z

231

3-D Motion Estimation Using Range Data  

Science Conference Proceedings (OSTI)

... Digital Object Identifier 10.1109/TITS.2006.883112 ... sequences were constructed via 3-D object-oriented graphics library (OOGL) files. ... SPIE—Adv. ...

2009-02-03T23:59:59.000Z

232

3D Materials Science 2012: Technical Program  

Science Conference Proceedings (OSTI)

3D Materials Science 2012: Technical Program July 8-12, 2012 • Seven Springs Mountain Resort • Seven Springs, Pennsylvania. View Session Sheets.

233

A Memory Efficient 3-D DWT Architecture  

Science Conference Proceedings (OSTI)

This paper proposes a memory efficientreal-time 3-D DWT algorithm and its architectural implementation. As the running JD-DWT refreshes the wavelet coefficients with the arrival of every two newframes, the latency of the conventional 3D-DWT reduces by ...

B. Das; Swapna Banerjee

2003-01-01T23:59:59.000Z

234

Edge structure preserving 3-D image denoising  

Science Conference Proceedings (OSTI)

In various applications, including magnetic resonance imaging (MRI) and functional MRI (fMRI), 3- D images get increasingly popular. To improve reliability of subsequent image analyses, 3-D image denoising is often a necessary pre-processing step, which ... Keywords: edge-preserving image restoration, jump regression analysis, surface estimation

Peihua Qiu; Partha Sarathi Mukherjee

2011-01-01T23:59:59.000Z

235

Hardware trust implications of 3-D integration  

Science Conference Proceedings (OSTI)

3-D circuit-level integration is a chip fabrication technique in which two or more dies are stacked and combined into a single circuit through the use of vertical electroconductive posts. Since the dies may be manufactured separately, 3-D circuit integration ...

Ted Huffmire; Timothy Levin; Michael Bilzor; Cynthia E. Irvine; Jonathan Valamehr; Mohit Tiwari; Timothy Sherwood; Ryan Kastner

2010-10-01T23:59:59.000Z

236

Characterization and Modeling of 3D Photovoltaics  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2012. Symposium, Energy Conversion – Photovoltaic, Concentrating Solar Power, and ...

237

3D Magnetotelluric characterization of the COSO GeothermalField  

DOE Green Energy (OSTI)

Knowledge of the subsurface electrical resistivity/conductivity can contribute to a better understanding of complex hydrothermal systems, typified by Coso geothermal field, through mapping the geometry (bounds and controlling structures) over existing production. Three-dimensional magnetotelluric (MT) inversion is now an emerging technology for characterizing the resistivity structures of complex geothermal systems. The method appears to hold great promise, but histories exploiting truly 3D inversion that demonstrate the advantages that can be gained by acquiring and analyzing MT data in three dimensions are still few in number. This project will address said issue, by applying 3D MT forward modeling and inversion to a MT data set acquired over the Coso geothermal field. The goal of the project is to provide the capability to image large geothermal reservoirs in a single self-consistent model. Initial analysis of the Coso MT data has been carried out using 2D MT imaging technology to construct an initial 3D resistivity model from a series of 2D resistivity images obtained using the inline electric field measurements (Zxy impedance elements) along different measurement transects. This model will be subsequently refined through a 3D inversion process. The initial 3D resistivity model clearly shows the controlling geological structures possibly influencing well production at Coso. The field data however, also show clear three dimensionality below 1 Hz, demonstrating the limitations of 2D resistivity imaging. The 3D MT predicted data arising from this starting model show good correspondence in dominant components of the impedance tensor (Zxy and Zyx) above 1Hz. Below 1 Hz there is significant differences between the field data and the 2D model data.

Newman, Gregory A.; Hoversten, Michael; Gasperikova, Erika; Wannamaker, Philip E.

2005-01-01T23:59:59.000Z

238

Spectral-Driven Isometry-Invariant Matching of 3D Shapes  

Science Conference Proceedings (OSTI)

This paper presents a matching method for 3D shapes, which comprises a new technique for surface sampling and two algorithms for matching 3D shapes based on point-based statistical shape descriptors. Our sampling technique is based on critical points ... Keywords: 3D model retrieval, Feature points, Isometry-invariant matching, Laplace-Beltrami operator, Local statistical shape descriptors

Mauro R. Ruggeri; Giuseppe Patanè; Michela Spagnuolo; Dietmar Saupe

2010-09-01T23:59:59.000Z

239

Review: 3D geo-database research: Retrospective and future directions  

Science Conference Proceedings (OSTI)

3D geo-database research is a promising field to support challenging applications such as 3D urban planning, environmental monitoring, infrastructure management, and early warning or disaster management and response. In these fields, interdisciplinary ... Keywords: 3D GIS, Geo-data modelling, Geo-database, Information systems for geo- and environmental sciences

Martin Breunig; Sisi Zlatanova

2011-07-01T23:59:59.000Z

240

FELIX 3d display: human-machine interface for interactive real three-dimensional imaging  

Science Conference Proceedings (OSTI)

Flat 2D screens cannot display complex 3D structures without the usage of different slices of the 3D model. A volumetric display, like the FELIX 3D Display can solve this problem. It provides space-filling images and is characterized by “multi-viewer” ...

Knut Langhans; Klaas Oltmann; Sebastian Reil; Lars Goldberg; Hannes Hatecke

2005-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

The process approach to synthesizing and analyzing of 3D representations of complex technical objects  

Science Conference Proceedings (OSTI)

3D-representations of complex technical objects are the basis of today's industry. The proposed technology solves tasks of increasing the accuracy and comprehension of the 3D-representations, and decreasing the time needed to synthesize ones. It bases ... Keywords: 3D-models, fuzzy sets, linguistic variables, process estimation

A. F. Pokhilko; L. E. Kamalov

2013-03-01T23:59:59.000Z

242

Performance Analysis of Leading HPC Architectures With Beambeam3D  

Science Conference Proceedings (OSTI)

High energy colliders are essential to study the inner structure of nuclear and elementary particles. A parallel particle simulation code, BeamBeam3D, has been developed and actively used to model the beam dynamics and to optimize the performance of ... Keywords: HPC application, accelerator modeling, performance optimization, performance tuning

Hongzhang Shan; Erich Strohmaier; Ji Qiang

2008-02-01T23:59:59.000Z

243

Reinforced concrete perforation and penetration simulation using AUTODYN-3D  

Science Conference Proceedings (OSTI)

3D hydrocode simulation on the perforation and penetration of reinforced concrete target has been performed. The simulation aims to examine the influence of the following constitutive models for concrete on a projectile's residual velocity: (1) constant-yield ... Keywords: Constitutive model, Hydrocode, Perforation, Projectile, Reinforced concrete

C. Y. Tham

2005-08-01T23:59:59.000Z

244

Photo tourism: exploring photo collections in 3D  

Science Conference Proceedings (OSTI)

We present a system for interactively browsing and exploring large unstructured collections of photographs of a scene using a novel 3D interface. Our system consists of an image-based modeling front end that automatically computes the viewpoint of each ... Keywords: image-based modeling, image-based rendering, photo browsing, structure from motion

Noah Snavely; Steven M. Seitz; Richard Szeliski

2006-07-01T23:59:59.000Z

245

Enabling High Energy Density Redox Chemistries and 3D Electrode ...  

Science Conference Proceedings (OSTI)

Carbon-Sulfur Nanocomposite Cathode Materials for Lithium-Sulfur Batteries · Carbonized ... Graphenic Material for High Performance Li-Ion Battery Electrodes .

246

SHREC 2010 - Shape Retrieval Contest based on Generic 3D ...  

Science Conference Proceedings (OSTI)

... this track is to evaluate the performance of 3D shape retrieval approaches on a Generic 3D shape benchmark based on the Google 3D Warehouse. ...

247

Modelling charge transfer reactions with the frozen density embedding formalism  

SciTech Connect

The frozen density embedding (FDE) subsystem formulation of density-functional theory is a useful tool for studying charge transfer reactions. In this work charge-localized, diabatic states are generated directly with FDE and used to calculate electronic couplings of hole transfer reactions in two {pi}-stacked nucleobase dimers of B-DNA: 5{sup '}-GG-3{sup '} and 5{sup '}-GT-3{sup '}. The calculations rely on two assumptions: the two-state model, and a small differential overlap between donor and acceptor subsystem densities. The resulting electronic couplings agree well with benchmark values for those exchange-correlation functionals that contain a high percentage of exact exchange. Instead, when semilocal GGA functionals are used the electronic couplings are grossly overestimated.

Pavanello, Michele [Gorlaeus Laboratories, Leiden Institute of Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden (Netherlands); Neugebauer, Johannes [Institute for Physical and Theoretical Chemistry, Technische Universitaet Braunschweig, Hans-Sommer-Strasse 10, 38106 Braunschweig (Germany)

2011-12-21T23:59:59.000Z

248

ISReal: an open platform for semantic-based 3D simulations in the 3D internet  

Science Conference Proceedings (OSTI)

We present the first open and cross-disciplinary 3D Internet research platform, called ISReal, for intelligent 3D simulation of realities. Its core innovation is the comprehensively integrated application of semantic Web technologies, semantic services, ...

Patrick Kapahnke; Pascal Liedtke; Stefan Nesbigall; Stefan Warwas; Matthias Klusch

2010-11-01T23:59:59.000Z

249

Special Section on 3D Object Retrieval: Efficient 3D object recognition using foveated point clouds  

Science Conference Proceedings (OSTI)

Recent hardware technologies have enabled acquisition of 3D point clouds from real world scenes in real time. A variety of interactive applications with the 3D world can be developed on top of this new technological scenario. However, a main problem ... Keywords: 3D object recognition, Moving fovea, Point cloud

Rafael Beserra Gomes, Bruno Marques Ferreira Da Silva, Lourena Karin De Medeiros Rocha, Rafael Vidal Aroca, Luiz Carlos Pacheco Rodrigues Velho, Luiz Marcos Garcia GonçAlves

2013-08-01T23:59:59.000Z

250

AOCS Official Method Cd 3d-63  

Science Conference Proceedings (OSTI)

Acid Value AOCS Official Method Cd 3d-63 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads DEFINITION The acid value is the number of milligrams of potassium hydroxide necess

251

3D TORUS V1.0  

Energy Science and Technology Software Center (OSTI)

002440MLTPL00 3D Torus Routing Engine Module for OFA OpenSM v. 1.0  http://www.openfabrics.org/git?p=sashak/management.git;a=sum 

252

AOCS Official Method Ca 3d-02  

Science Conference Proceedings (OSTI)

Determination of Sediment in Crude Fats and Oils—Centrifuge Method AOCS Official Method Ca 3d-02 Methods Methods and Analyses Analytical Chemistry Methods Downloads Methods Downloads AOCS DEFINITION...

253

geom3d.html - CECM  

E-Print Network (OSTI)

Line: AreConcurrent AreCoplanar AreParallel ArePerpendicular AreSkewLines ... In this case, the power of the geom3d package is dependent on the power of ...

254

Extending 2-D Smoothed Local Symmetries to 3-D  

E-Print Network (OSTI)

3-D Smoothed Local Symmetries (3-D SLS's) are presented as a representation for three-dimensional shapes. 3-D SLS's make explicit the perceptually salient features of 3-D objects and are especially suited to representing ...

Braunegg, David J.

255

3D Magnetotelluic characterization of the Coso GeothermalField  

Science Conference Proceedings (OSTI)

Electrical resistivity may contribute to progress inunderstanding geothermal systems by imaging the geometry, bounds andcontrolling structures in existing production, and thereby perhapssuggesting new areas for field expansion. To these ends, a dense grid ofmagnetotelluric (MT) stations plus a single line of contiguous bipolearray profiling has been acquired over the east flank of the Cosogeothermal system. Acquiring good quality MT data in producing geothermalsystems is a challenge due to production related electromagnetic (EM)noise and, in the case of Coso, due to proximity of a regional DCintertie power transmission line. To achieve good results, a remotereference completely outside the influence of the dominant source of EMnoise must be established. Experimental results so far indicate thatemplacing a reference site in Amargosa Valley, NV, 65 miles from the DCintertie, isstill insufficient for noise cancellation much of the time.Even though the DC line EM fields are planar at this distance, theyremain coherent with the nonplanar fields in the Coso area hence remotereferencing produces incorrect responses. We have successfully unwrappedand applied MT times series from the permanent observatory at Parkfield,CA, and these appear adequate to suppress the interference of thecultural EM noise. The efficacy of this observatory is confirmed bycomparison to stations taken using an ultra-distant reference site eastof Socorro, NM. Operation of the latter reference was successful by usingfast ftp internet communication between Coso Junction and the New MexicoInstitute of Mining and Technology, using the University of Utah site asintermediary, and allowed referencing within a few hours of datadownloading at Coso. A grid of 102 MT stations was acquired over the Cosogeothermal area in 2003 and an additional 23 stations were acquired toaugment coverage in the southern flank of the first survey area in 2005.These data have been inverted to a fully three-dimensional conductivitymodel. Initial analysis of the Coso MT data was carried out using 2D MTimaging. An initial 3D conductivity model was constructed from a seriesof 2D resistivity images obtained using the inline electric fieldmeasurements (Zyx impedance elements) along several measurementtransects. This model was then refined through a 3D inversion process.This model shows the controlling geological structures possiblyinfluencing well production at Coso and correlations with mapped surfacefeatures such as faults and regional geoelectric strike. The 3D modelalso illustrates the refinement in positioning of conductivity contactswhen compared to isolated 2D inversion transects. The conductivity modelhas also been correlated with microearthquake locations, well fluidproduction intervals and most importantly with an acoustic and shearvelocity model derived by Wu and Lees (1999). This later correlationshows the near-vertical high conductivity structure on the eastern flankof the producing field is also a zone of increased acoustic velocity andincreased Vp/Vs ratio bounded by mapped fault traces. South of theDevil's Kitchen is an area of high geothermal well density, where highlyconductive near surface material is interpreted as a clay cap alterationzone manifested from the subsurface geothermal fluids and relatedgeochemistry. Beneath the clay cap, however, the conductivity isnondescript, whereas the Vp/Vs ratio is enhanced over the productionintervals. It is recommended that more MT data sites be acquired to thesouthwest of the Devil's Kitchen area to better refine the conductivitymodel in that area.

Newman, Gregory A.; Hoversten, G. Michael; Wannamaker, Philip E.; Gasperikova, Erika

2007-04-23T23:59:59.000Z

256

Development of a RELAP5-3D three-dimensional model of a VVER-1000 Nuclear Power Plant for analysis of a large-break loss-of-coolant accident  

E-Print Network (OSTI)

In order to analyze the benefits of the multi-dimensional hydrodynamic modeling capability of the RELAP5-3D system code in the VVER-1000 Nuclear Power Plant, a three-dimensional model of the core, downcomer, and lower plenum have been created to replace their one-dimensional counterparts in a complete plant model. This multi-dimensional model has been validated with plant operational data and other computer simulations of a thermal-hydraulic transient. The simulated transient considered was a large-break loss-of-coolant accident (LB LOCA). A validated, one-dimensional control of the nuclear power plant, for the study of the effects of mixed oxide (MOX) fuel, was modified to include a standard fuel loading of UO?. The development of the three-dimensional sections of the reactor vessel consisted of ensuring geometrical fidelity with the design of the modeled plant, the Balacovo Unit 4, Nuclear Power Plant in Saratov, Russia. A stable operational steady-state was obtained and the calculated plant conditions compared well with the design values of the Balacovo Plant. Transient results verified that the simulated thermal-hydraulic conditions of the multi-dimensional model agreed well with both the control and analyses that have been performed separately from this report. It was found that the multi-dimensional model has shown a reduction in the calculated hot-spot peak-clad temperature (PCT) during the blowdown stage of a LB LOCA and an increase in PCT during the reflood stage. A preliminary uncertainty analysis of the PCT during blowdown stage was performed using a response surface method of the Code Scaling, Applicability, and Uncertainty Method and a significant number of relevant input variables. From the preliminary analysis, the PCT reduction during blowdown appears to be significant, but a further, more detailed analysis should be performed, along with an uncertainty analysis of the PCT during the reflood stage. The enhanced depiction of the flow patterns and temperature distributions in the transient situation allowed the user further understanding of the thermal-hydraulic conditions throughout the transient. The developed model proved to be suitable for analysis of the VVER-1000 plant, but to further the applicability of the model a three-dimensional kinetics model of the neutronics and three-dimensional hydrodynamic models of the horizontal steam generators should be included.

Clarno, Kevin Taylor

2001-01-01T23:59:59.000Z

257

Simulation of rock fracture with the 3-D SHALE code  

SciTech Connect

The 3-D SHALE code simulates the propagation of stress waves and the occurrence of fracture in brittle solids. The physical models and numerical methods in this code are similar to those used in 2-D SHALE. We describe the 3-D code and present sample calculations for blasting in oil shale with a single isolated charge, an infinite array of charges, and an isolated pair of charges. These calculations illustrate the use of the code to simulate dynamic phenomena in complex geometric configurations. Some useful code improvements and possible applications are discussed. 8 references, 7 figures.

Nichols, B.D.; Adams, T.F.

1985-01-01T23:59:59.000Z

258

3D hybrid simulation code using curvilinear coordinates  

Science Conference Proceedings (OSTI)

A new simulation code using the hybrid approximation for modeling extraterrestrial plasma processes is described, which can be used in an arbitrary three-dimensional, ordered, hexahedral grid. Maxwell's equations are transformed using common tensor analysis ... Keywords: 3D, curvilinear, hybrid, plasma, simulation

T. Bagdonat; U. Motschmann

2002-12-01T23:59:59.000Z

259

Zigbee-based Internet of Things in 3D Terrains  

Science Conference Proceedings (OSTI)

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

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

2013-08-01T23:59:59.000Z

260

3D porosity prediction from seismic inversion and neural networks  

Science Conference Proceedings (OSTI)

In this work, we address the problem of transforming seismic reflection data into an intrinsic rock property model. Specifically, we present an application of a methodology that allows interpreters to obtain effective porosity 3D maps from post-stack ... Keywords: Feed-forward neural network, Matlab, Reservoir characterization, Seismic inversion

Emilson Pereira Leite; Alexandre Campane Vidal

2011-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

Extracting and depicting the 3D shape of specular surfaces  

Science Conference Proceedings (OSTI)

Many materials including water, plastic and metal have specular surface characteristics. Specular reflections have commonly been considered a nuisance for the recovery of object shape. However, the way that reflections are distorted across the surface ... Keywords: 3D shape perception, model of cortical form processing, non-photorealistic rendering

Ulrich Weidenbacher; Pierre Bayerl; Roland Fleming; Heiko Neumann

2005-08-01T23:59:59.000Z

262

Programmable rendering of line drawing from 3D scenes  

Science Conference Proceedings (OSTI)

This article introduces a programmable approach to nonphotorealistic line drawings from 3D models, inspired by programmable shaders in traditional rendering. This approach relies on the assumption generally made in NPR that style attributes (color, thickness, ... Keywords: Line drawing, nonphotorealistic rendering (NPR), style

Stéphane Grabli; Emmanuel Turquin; Frédo Durand; François X. Sillion

2010-03-01T23:59:59.000Z

263

Prototypes for automated architectural 3D-layout  

Science Conference Proceedings (OSTI)

Prototypes for automated spatial layout in architecture focus on approaches, which define occupiable space as an orthogonal 2D-grid and use algorithms to allocate each rectangle of the grid to a particular function. However, these approaches are limiting ... Keywords: 3D-modeling and automated spatial layout, euclidean and non-euclidean geometries, satisfiability

Henriette Bier; Adriaan De Jong; Niels Brouwers; Marijn Heule; Hans Van Maaren / Gijs Van Der Hoorn

2007-09-01T23:59:59.000Z

264

A survey on CAD methods in 3D garment design  

Science Conference Proceedings (OSTI)

With the advance in virtual reality applications, garment industry has strived for new developments. This paper reviews state-of-the-art CAD methods in 3D garment design. A large range of techniques are selected and organized into several key modules ... Keywords: CAD methods, Feature modeling, Garments

Yong-Jin Liu; Dong-Liang Zhang; Matthew Ming-Fai Yuen

2010-08-01T23:59:59.000Z

265

ARM - Publications: Science Team Meeting Documents: Application of 3D  

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

Application of 3D Radiative Transfer to Mountains Application of 3D Radiative Transfer to Mountains Chen, Yong UCLA Hall, Alex University of California, Los Angeles Liou, Kuo-Nan UCLA A large part of the land surface is not flat, but vertically structured. In mountain terrain, accurate calculations of the net radiation for slopes of varying gradient and orientation are of considerable importance in determining the energy budget of the surface. In order to evaluate the surface variations of total solar irradiance, it is necessary to calculate the direct, diffuse and terrain-reflected components. A 3D Monte Carlo radiative transfer model has been developed and applied to mountain surfaces to study the diurnal and seasonal changes in surface fluxes by choosing 9 different solar zenith angles, including noon, sunrise+1/2 hour,

266

Martensitic Transformations in Steels – A 3D Phase-field Study  

Science Conference Proceedings (OSTI)

In the present work a physically based 3D elastoplastic phase-field model is developed .... The Study of Phase Transformations in Metastable Beta-Ti Alloys by ...

267

Determination of 3-D Cloud Ice Water Contents by Combining Multiple...  

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

Determination of 3-D Cloud Ice Water Contents by Combining Multiple Data Sources from Satellite, Ground Radar, and a Numerical Model Liu, Guosheng Florida State University Seo,...

268

NREL: Technology Deployment - NREL Teams with concept3D to Develop...  

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

NREL's Larry Brackney Applying NREL's advanced energy modeling framework and building energy audit processes, collaboration tools, and in-app media and concept3D's geometric...

269

NREL: Buildings Research - NREL Teams with concept3D to Develop...  

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

NREL's Larry Brackney Applying NREL's advanced energy modeling framework and building energy audit processes, collaboration tools, and in-app media and concept3D's geometric...

270

The Use of the Weibull Three-Parameter Model for Estimating Mean Wind Power Densities  

Science Conference Proceedings (OSTI)

The Weibull three-parameter model is discussed for estimation of mean wind power densities. This probability density function is a generalization of a number of more conventional density functions. Using wind speed observations, it is shown that ...

L. Van Der Auwera; F. De Meyer; L. M. Malet

1980-07-01T23:59:59.000Z

271

A thermal analysis model for high power density beam stops  

SciTech Connect

The Lawrence Berkeley National Laboratory (LBNL) is presently designing and building the 2.5 MeV injector for the Spallation Neutron Source (SNS). The design includes various beam intercepting devices such as beam stops and slits. The target power densities can be as high as 500 kW/cm{sup 2} with a beam stopping range of 25 to 30 microns, producing stresses well above yield in most materials. In order to analyze the induced temperatures and stresses, a finite element model has been developed. The model has been written parametrically to allow the beam characteristics, target material, dimensions, angle of incidence and mesh densities to be easily adjusted. The heat load is applied to the model through the use of a 3-dimensional table containing the calculated volumetric heat rates. The load is based on a bi-gaussian beam shape which is absorbed by the target according to a Bragg peak distribution. The results of several analyses using the SNS Front End beam are presented.

Virostek, S.; Oshatz, D.; Staples, J.

2001-06-08T23:59:59.000Z

272

Evaluating Extensible 3D (X3D) Graphics For Use in Software Visualisation.  

E-Print Network (OSTI)

??3D web software visualisation has always been expensive, special purpose, and hard to program. Most of the technologies used require large amounts of scripting, are… (more)

Anslow, Craig

2008-01-01T23:59:59.000Z

273

3D-Printerens Udbredelse; The Diffusion of the 3D-Printer.  

E-Print Network (OSTI)

??This Paper investigates the 3D Printers curent state of diffusion and impact on modernity with use of Rogers theory of diffusion of innovation in relation… (more)

Lindhardt, Tobias

2013-01-01T23:59:59.000Z

274

An FPGA-based 3D Graphics System; Ett FPGA-baserat 3D-grafiksystem.  

E-Print Network (OSTI)

?? This report documents the work done by the author to design and implement a 3D graphics system on an FPGA (Field Programmable Gate Array).… (more)

Knutsson, Niklas

2005-01-01T23:59:59.000Z

275

3D engine for immersive virtual environments  

E-Print Network (OSTI)

The purpose of this project is to develop a software framework, a 3D engine, which will generate images to be projected onto facets of a spatially immersive display (SID). The goal is to develop a software library to support the creation of images of specified 3D environments which are specific to the display geometries of a polyhedral class of SIDs. Part of this goal is developing auxiliary software to allow this library to be thoroughly tested. When properly working, the images being displayed on adjoining faces of the SID appear spatially and temporally consistent with one another, creating the illusion that the user is within a surrounding three-dimensional space.

Anderson, Christopher Dean

2003-12-01T23:59:59.000Z

276

Shell model transition densities for electron and pion scattering  

Science Conference Proceedings (OSTI)

The general features of an effective interaction suitable for the calculation of cross-shell matrix elements in the /sup 16/O region are discussed. Shell-model transition densities are applied to the 1 hw excitation of non-normal parity states in light-nuclei, with /sup 13/C used as a prime example. The longitudinal form factors from such a calculation require enhancement and transverse form factors (spin-excitations) need to be quenched. The shapes of form factors also exhibit systematic discrepancies which are correlated with the discrepancies in magnitude. The problem with shapes is particularly marked for C1 form factors. It is shown that the addition of small components to the transition density, corresponding to the excitation of a single particle through two or three major shells, works in the right direction as far as both magnitude and shape are concerned and that such additions are particularly effective in the case of C1 excitations. For the transverse form factors in /sup 13/C, the use of Woods-Saxon radial wave functions leads to reductions of up to 50% compared with harmonic oscillator wave functions. The excitation of states with dominant multiparticle-multihole components, and the role played by admixtures of such configurations in low-lying states, is considered. Some of the problems associated with the use of shell-model bases extended to include high-lying configurations in the giant resonance region are pointed out. 15 refs., 15 figs., 1 tab.

Millener, D.J.

1987-01-01T23:59:59.000Z

277

3-D Airflow Measurement Using Smoke Particles  

Science Conference Proceedings (OSTI)

A new 3-D PIV-technique that is applicable to low velocity airflow in a real space such as indoor airflow is proposed, and its performance is inspected through a simulation and an experimental application. In this technique, two parallel planes separated ... Keywords: PIV, indoor airflow, pattern tracking, simulation, wind tunnel experiment

A. Kaga; K. Yamaguchi; Y. Inoue; A. Kondo

1998-08-01T23:59:59.000Z

278

BEM for 3D unsteady-state flow problems in porous media with a finite-conductivity horizontal wellbore  

Science Conference Proceedings (OSTI)

This paper presents a Boundary Element Method (BEM) for the solution of unsteady-state fluid flow problems in a 3D domain. A general 3D reservoir model was developed in a bounded porous media with Neumann's, Dirichlet's or mixed boundary conditions. ... Keywords: 3D unsteady-state flow problem, BEM, Coupled reservoir/wellbore model, Horizontal well

Yueming Cheng; Duane A. McVay; W. John Lee

2005-04-01T23:59:59.000Z

279

PhD Project Proposal PV-Aware Design for Reliable 3-D Integration  

E-Print Network (OSTI)

PhD Project Proposal PV-Aware Design for Reliable 3-D Integration The trend of moving from planar dimension, and of the constraints on the positions of the through-silicon-vias and their timing models - Development of (stress-aware) mobility variation timing models for 3-D interconnect integration to augment

Langendoen, Koen

280

Magnetism In 3d Transition Metals at High Pressures  

SciTech Connect

This research project examined the changes in electronic and magnetic properties of transition metals and oxides under applied pressures, focusing on complex relationship between magnetism and phase stability in these correlated electron systems. As part of this LDRD project, we developed new measurement techniques and adapted synchrotron-based electronic and magnetic measurements for use in the diamond anvil cell. We have performed state-of-the-art X-ray spectroscopy experiments at the dedicated high-pressure beamline HP-CAT (Sector 16 Advanced Photon Source, Argonne National Laboratory), maintained in collaboration with of University of Nevada, Las Vegas and Geophysical Laboratory of The Carnegie Institution of Washington. Using these advanced measurements, we determined the evolution of the magnetic order in the ferromagnetic 3d transition metals (Fe, Co and Ni) under pressure, and found that at high densities, 3d band broadening results in diminished long range magnetic coupling. Our experiments have allowed us to paint a unified picture of the effects of pressure on the evolution of magnetic spin in 3d electron systems. The technical and scientific advances made during this LDRD project have been reported at a number of scientific meetings and conferences, and have been submitted for publication in technical journals. Both the technical advances and the physical understanding of correlated systems derived from this LDRD are being applied to research on the 4f and 5f electron systems under pressure.

Iota, V

2006-02-09T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

Making 3D work: a classification of visual depth cues, 3D display technologies and their applications  

Science Conference Proceedings (OSTI)

3D display technologies improve perception and interaction with 3D scenes, and hence can make applications more effective and efficient. This is achieved by simulating depth cues used by the human visual system for 3D perception. The type of employed ... Keywords: 3D display technologies, applications of 3D display technologies, classification, depth cues, stereo perception

Mostafa Mehrabi, Edward M. Peek, Burkhard C. Wuensche, Christof Lutteroth

2013-01-01T23:59:59.000Z

282

Parallel 3-D S{sub N} performance for DANTSYS/MPI on the Cray T3D  

Science Conference Proceedings (OSTI)

A data parallel version of the 3-D transport solver in DANTSYS has been in use on the SIMD CM-200`s at LANL since 1994. This version typically obtains grind times of 150--200 nanoseconds on a 2,048 PE CM-200. The authors have now implemented a new message passing parallel version of DANTSYS, referred to as DANTSYS/MPI, on the 512 PE Cray T3D at Los Alamos. By taking advantage of the SPMD architecture of the Cray T3D, as well as its low latency communications network, they have managed to achieve grind times of less than 10 nanoseconds on real problems. DANTSYS/MPI is fully accelerated using DSA on both the inner and outer iterations. This paper describes the implementation of DANTSYS/MPI on the Cray T3D, and presents two simple performance models for the transport sweep which accurately predict the grind time as a function of the number of PE`s and problem size, or scalability.

Baker, R.S.; Alcouffe, R.E. [Los Alamos National Lab., NM (United States). Transport Methods Group

1997-05-01T23:59:59.000Z

283

3-D Metals | Open Energy Information  

Open Energy Info (EERE)

Metals Metals Jump to: navigation, search Name 3-D Metals Facility 3-D Metals Sector Wind energy Facility Type Small Scale Wind Facility Status In Service Location Valley City OH Coordinates 41.2481362°, -81.88305616° 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":41.2481362,"lon":-81.88305616,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

284

3D Technology for intelligent trackers  

SciTech Connect

At Super-LHC luminosity it is expected that the standard suite of level 1 triggers for CMS will saturate. Information from the tracker will be needed to reduce trigger rates to satisfy the level 1 bandwidth. Tracking trigger modules which correlate information from closely-spaced sensor layers to form an on-detector momentum filter are being developed by several groups. We report on a trigger module design which utilizes three dimensional integrated circuit technology incorporating chips which are connected both to the top and bottom sensor, providing the ability to filter information locally. A demonstration chip, the VICTR, has been submitted to the Chartered/Tezzaron two-tier 3D run coordinated by Fermilab. We report on the 3D design concept, the status of the VICTR chip and associated sensor integration utilizing oxide bonding.

Lipton, Ronald; /Fermilab

2010-09-01T23:59:59.000Z

285

3D Technologies for Large Area Trackers  

E-Print Network (OSTI)

We describe technologies which can be developed to produce large area, low cost pixelated tracking detec- tors. These utilize wafer-scale 3D electronics and sensor technologies currently being developed in industry. This can result in fully active sensor/readout chip tiles which can be assembled into large area arrays with good yield and minimal dead area. The ability to connect though the bulk of the device can also provide better electrical performance and lower mass.

Deptuch, G; Johnson, M; Kenney, C; Lipton, R; Narian, M; Parker, S; Shenai, A; Spiegel, L; Thom, J; Ye, Z

2013-01-01T23:59:59.000Z

286

3D Technologies for Large Area Trackers  

E-Print Network (OSTI)

We describe technologies which can be developed to produce large area, low cost pixelated tracking detec- tors. These utilize wafer-scale 3D electronics and sensor technologies currently being developed in industry. This can result in fully active sensor/readout chip tiles which can be assembled into large area arrays with good yield and minimal dead area. The ability to connect though the bulk of the device can also provide better electrical performance and lower mass.

G. Deptuch; U. Heintz; M. Johnson; C. Kenney; R. Lipton; M. Narian; S. Parker; A. Shenai; L. Spiegel; J. Thom; Z. Ye

2013-07-16T23:59:59.000Z

287

3-D Interpretation Of Magnetotelluric Data At The Bajawa Geothermal...  

Open Energy Info (EERE)

3-D Interpretation Of Magnetotelluric Data At The Bajawa Geothermal Field, Indonesia Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: 3-D...

288

Restructuring of RELAP5-3D  

SciTech Connect

The RELAP5-3D source code is unstructured with many interwoven logic flow paths. By restructuring the code, it becomes easier to read and understand, which reduces the time and money required for code development, debugging, and maintenance. A structured program is comprised of blocks of code with one entry and exit point and downward logic flow. IF tests and DO loops inherently create structured code, while GOTO statements are the main cause of unstructured code. FOR_STRUCT is a commercial software package that converts unstructured FORTRAN into structured programming; it was used to restructure individual subroutines. Primarily it transforms GOTO statements, ARITHMETIC IF statements, and COMPUTED GOTO statements into IF-ELSEIF-ELSE tests and DO loops. The complexity of RELAP5-3D complicated the task. First, FOR_STRUCT cannot completely restructure all the complex coding contained in RELAP5-3D. An iterative approach of multiple FOR_STRUCT applications gave some additional improvements. Second, FOR_STRUCT cannot restructure FORTRAN 90 coding, and RELAP5-3D is partially written in FORTRAN 90. Unix scripts for pre-processing subroutines into coding that FOR_STRUCT could handle and post-processing it back into FORTRAN 90 were written. Finally, FOR_STRUCT does not have the ability to restructure the RELAP5-3D code which contains pre-compiler directives. Variations of a file were processed with different pre-compiler options switched on or off, ensuring that every block of code was restructured. Then the variations were recombined to create a completely restructured source file. Unix scripts were written to perform these tasks, as well as to make some minor formatting improvements. In total, 447 files comprising some 180,000 lines of FORTRAN code were restructured. These showed significant reduction in the number of logic jumps contained as measured by reduction in the number of GOTO statements and line labels. The average number of GOTO statements per subroutine dropped from 8.8 before restructuring to 5.3 afterwards, a reduction of 40%. The maximum number of GOTO statements in any subroutine dropped from 213 to 99, a factor of 2.1. Finally, the maximum number of statement labels dropped from 210 to 43, a factor of nearly 5. While many blocks of code remain unstructured, a much greater fraction of the code is now structured. These measurements indicate a serious reduction in degree of interweaving of logic paths.

George Mesina; Joshua Hykes

2005-09-01T23:59:59.000Z

289

Molecular Predictors of 3D Morphogenesis by Breast Cancer Cell Lines in 3D Culture  

Science Conference Proceedings (OSTI)

Correlative analysis of molecular markers with phenotypic signatures is the simplest model for hypothesis generation. In this paper, a panel of 24 breast cell lines was grown in 3D culture, their morphology was imaged through phase contrast microscopy, and computational methods were developed to segment and represent each colony at multiple dimensions. Subsequently, subpopulations from these morphological responses were identified through consensus clustering to reveal three clusters of round, grape-like, and stellate phenotypes. In some cases, cell lines with particular pathobiological phenotypes clustered together (e.g., ERBB2 amplified cell lines sharing the same morphometric properties as the grape-like phenotype). Next, associations with molecular features were realized through (i) differential analysis within each morphological cluster, and (ii) regression analysis across the entire panel of cell lines. In both cases, the dominant genes that are predictive of the morphological signatures were identified. Specifically, PPAR? has been associated with the invasive stellate morphological phenotype, which corresponds to triple-negative pathobiology. PPAR? has been validated through two supporting biological assays.

Han, Ju; Chang, Hang; Giricz, Orsi; Lee, Genee; Baehner, Frederick; Gray, Joe; Bissell, Mina; Kenny, Paraic; Parvin, Bahram

2010-02-01T23:59:59.000Z

290

Architectural Advancements in RELAP5-3D  

SciTech Connect

As both the computer industry and field of nuclear science and engineering move forward, there is a need to improve the computing tools used in the nuclear industry to keep pace with these changes. By increasing the capability of the codes, the growing modeling needs of nuclear plant analysis will be met and advantage can be taken of more powerful computer languages and architecture. In the past eighteen months, improvements have been made to RELAP5-3D [1] for these reasons. These architectural advances include code restructuring, conversion to Fortran 90, high performance computing upgrades, and rewriting of the RELAP5 Graphical User Interface (RGUI) [2] and XMGR5 [3] in Java. These architectural changes will extend the lifetime of RELAP5-3D, reduce the costs for development and maintenance, and improve it speed and reliability.

Dr. George L. Mesina

2005-11-01T23:59:59.000Z

291

Solar Particle Acceleration at Reconnecting 3D Null Points  

E-Print Network (OSTI)

Context: The strong electric fields associated with magnetic reconnection in solar flares are a plausible mechanism to accelerate populations of high energy, non-thermal particles. One such reconnection scenario occurs at a 3D magnetic null point, where global plasma flows give rise to strong currents in the spine axis or fan plane. Aims: To understand the mechanism of charged particle energy gain in both the external drift region and the diffusion region associated with 3D magnetic reconnection. In doing so we evaluate the efficiency of resistive spine and fan models for particle acceleration, and find possible observables for each. Method: We use a full orbit test particle approach to study proton trajectories within electromagnetic fields that are exact solutions to the steady and incompressible magnetohydrodynamic equations. We study single particle trajectories and find energy spectra from many particle simulations. The scaling properties of the accelerated particles with respect to field and plasma para...

Stanier, Adam J; Dalla, Silvia

2012-01-01T23:59:59.000Z

292

Automatic generation of bas-reliefs from 3D shapes  

E-Print Network (OSTI)

generated by our method and their profiles (middle images). A bas-relief of the Stanford Armadillo model on a bended cylinder (most-right image). In this paper, we introduce and study a new problem of converting a given 3D shape (or a 2.5D range data) into a bas-relief. The problem can be considered as a geometry counterpart of the HDR image compression problem widely studied in computer graphics. In our approach to the shape bas-reliefing problem, we combine the concepts of mesh saliency, shape exaggerating, and discrete differential coordinates. The final bas-relief has a small width, preserves salient features of the original 3D shape, and, therefore, can be used for shape decorating purposes. 1

Wenhao Song; Alexander Belyaev; Hans-peter Seidel

2007-01-01T23:59:59.000Z

293

3D design tools improve efficiency and accuracy of a Hanford site nuclear waste storage project  

SciTech Connect

The complex effort of cleaning up the Hanford K Basins is separated into several individual projects. Fluor Hanford and Fluor Federal Services modeled key elements using a 3D parametric modeling program for mechanical design with training animations.

NIELSEN, B.L.

2003-03-23T23:59:59.000Z

294

Impact of Flow and Brand Equity in 3D Virtual Worlds  

Science Conference Proceedings (OSTI)

This research is a partial test of Park et al.'s 2008 model to assess the impact of flow and brand equity in 3D virtual worlds. It draws on flow theory as its main theoretical foundation to understand and empirically assess the impact of flow on brand ... Keywords: 3D Virtual Worlds, Brand Equity, Challenges, Flow, Intention, Skills

David DeWester; Brenda Eschenbrenner; So Ra Park; Fiona Fui-Hoon Nah

2010-07-01T23:59:59.000Z

295

Explicit transient thermal simulation of liquid-cooled 3D ICs  

Science Conference Proceedings (OSTI)

The high heat flux and compact structure of three-dimensional circuits (3D ICs) make conventional air-cooled devices more subsceptible to overheating. Liquid cooling is an alternative that can improve heat dissipation, and reduce thermal issues. Fast ... Keywords: 3D ICs, compact thermal model, finite difference method, liquid-cooling

Alain Fourmigue, Giovanni Beltrame, Gabriela Nicolescu

2013-03-01T23:59:59.000Z

296

Modeling the Distribution of Precipitation Forecasts from the Canadian Ensemble Prediction System Using Kernel Density Estimation  

Science Conference Proceedings (OSTI)

Kernel density estimation is employed to fit smooth probabilistic models to precipitation forecasts of the Canadian ensemble prediction system. An intuitive nonparametric technique, kernel density estimation has become a powerful tool widely used ...

Syd Peel; Laurence J. Wilson

2008-08-01T23:59:59.000Z

297

Comparison of stochastic filtering methods for 3D tracking  

Science Conference Proceedings (OSTI)

In the recent years, the 3D visual research has gained momentum with publications appearing for all aspects of 3D including visual tracking. This paper presents a review of the literature published for 3D visual tracking over the past five years. The ... Keywords: 3D tracking, Articulated object tracking, Condensation algorithm, Kalman filter, Motion cue, Particle filter

Yasir Salih; Aamir Saeed Malik

2011-10-01T23:59:59.000Z

298

Natural Language Generation Journeys to Interactive 3D Worlds*  

E-Print Network (OSTI)

as they explain and demonstrate complex phenomena. In 3D interactive fiction systems, user- directed avatars that charac- terize physical devices must be clearly explained. NLG delivered with speech synthesis will need of interactive 3D worlds: self- . ." explaining 3D environments, habitable 3D learning en- vironments

299

A Hybrid Ensemble Kalman Filter–3D Variational Analysis Scheme  

Science Conference Proceedings (OSTI)

A hybrid ensemble Kalman filter–three-dimensional variational (3DVAR) analysis scheme is demonstrated using a quasigeostrophic model under perfect-model assumptions. Four networks with differing observational densities are tested, including one ...

Thomas M. Hamill; Chris Snyder

2000-08-01T23:59:59.000Z

300

Thermal via placement in 3D ICs  

E-Print Network (OSTI)

As thermal problems become more evident, new physical design paradigms and tools are needed to alleviate them. Incorporating thermal vias into integrated circuits (ICs) is a promising way of mitigating thermal issues by lowering the thermal resistance of the chip itself. However, thermal vias take up valuable routing space, and therefore, algorithms are needed to minimize their usage while placing them in areas where they would make the greatest impact. With the developing technology of three-dimensional integrated circuits (3D ICs), thermal problems are expected to be more prominent, and thermal vias can have a larger impact on them than in traditional 2D ICs. In this paper, thermal vias are assigned to specific areas of a 3D IC and used to adjust their effective thermal conductivities. The thermal via placement method makes iterative adjustments to these thermal conductivities in order to achieve a desired maximum temperature objective. Finite element analysis (FEA) is used in formulating the method and in calculating temperatures quickly during each iteration. As a result, the method efficiently achieves its thermal objective while minimizing the thermal via utilization.

Brent Goplen

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

TEMPEST. Transient 3-D Thermal-Hydraulic  

SciTech Connect

TEMPEST is a transient, three-dimensional, hydrothermal program that is designed to analyze a range of coupled fluid dynamic and heat transfer systems of particular interest to the Fast Breeder Reactor (FBR) thermal-hydraulic design community. The full three-dimensional, time-dependent equations of motion, continuity, and heat transport are solved for either laminar or turbulent fluid flow, including heat diffusion and generation in both solid and liquid materials. The equations governing mass, momentum, and energy conservation for incompressible flows and small density variations (Boussinesq approximation) are solved using finite-difference techniques. Analyses may be conducted in either cylindrical or Cartesian coordinate systems. Turbulence is treated using a two-equation model. Two auxiliary plotting programs, SEQUEL and MANPLOT, for use with TEMPEST output are included. SEQUEL may be operated in batch or interactive mode; it generates data required for vector plots, contour plots of scalar quantities, line plots, grid and boundary plots, and time-history plots. MANPLOT reads the SEQUEL-generated data and creates the hardcopy plots. TEMPEST can be a valuable hydrothermal design analysis tool in areas outside the intended FBR thermal-hydraulic design community.

Eyler, L.L. [Pacific Northwest Lab., Richland, WA (United States)

1992-01-31T23:59:59.000Z

302

Integrating 3D and 2D computer generated imagery for the comics medium  

E-Print Network (OSTI)

Advances in 3D computer technology have led to aesthetic experimentation within the comics medium. Comic creators have produced comic books done entirely with 3D models that are then assembled digitally for the printed page. However, in using these 3D objects in a comic format, the creators have developed art styles that do not adhere to the paradigms established by this traditionally 2D medium. More successful results can be achieved by integrating 3D computer generated imagery with traditional 2D imagery, rather than replacing it. This thesis develops a method of combining rendered 3D models with 2D vector graphics to create a comic book art style that is consistent with the traditional medium, while still taking advantage of the new technology.

DeLuna, Ruben

2004-12-01T23:59:59.000Z

303

Recent Hydrodynamics Improvements to the RELAP5-3D Code  

SciTech Connect

The hydrodynamics section of the RELAP5-3D computer program has been recently improved. Changes were made as follows: (1) improved turbine model, (2) spray model for the pressurizer model, (3) feedwater heater model, (4) radiological transport model, (5) improved pump model, and (6) compressor model.

Richard A. Riemke; Cliff B. Davis; Richard.R. Schultz

2009-07-01T23:59:59.000Z

304

3D metamaterials for the thermal infrared.  

Science Conference Proceedings (OSTI)

Metamaterials form a new class of artificial electromagnetic materials that provides the device designer with the ability to manipulate the flow of electromagnetic energy in ways that are not achievable with naturally occurring materials. However, progress toward practical implementation of metamaterials, particularly at infrared and visible frequencies, has been hampered by a combination of absorptive losses; the narrow band nature of the resonant metamaterial response; and the difficulty in fabricating fully 3-dimensional structures. They describe the progress of a recently initiated program at Sandia National Laboratories directed toward the development of practical 3D metamaterials operating in the thermal infrared. They discuss their analysis of fundamental loss limits for different classes of metamaterials. In addition, they discuss new design approaches that they are pursuing which reduce the reliance on metallic structures in an effort to minimize ohmic losses.

Sinclair, Michael B.; Brener, Igal; Wendt, Joel Robert; Burckel, David Bruce; Ten Eyck, Gregory A.

2010-06-01T23:59:59.000Z

305

Vectorial Radio Interferometry with LOPES 3D  

E-Print Network (OSTI)

One successful detection technique for high-energy cosmic rays is based on the radio signal emitted by the charged particles in an air shower. The LOPES experiment at Karlsruhe Institute of Technology, Germany, has made major contributions to the evolution of this technique. LOPES was reconfigured several times to improve and further develop the radio detection technique. In the latest setup LOPES consisted of 10 tripole antennas. With this, LOPES 3D was the first cosmic ray experiment measuring all three vectorial field components at once and thereby gaining the full information about the electric field vector. We present an analysis based on the data taken with special focus on the benefits of a direct measurement of the vertical polarization component. We demonstrate that by measuring all polarization components the detection and reconstruction efficiency is increased and noisy single channel data can be reconstructed by utilising the information from the other two channels of one antenna station.

Huber, D; Arteaga, J C; Bähren, L; Bekk, K; Bertaina, M; Biermann, P L; Blümer, J; Bozdog, H; Brancus, I M; Chiavassa, A; Daumiller, K; de Souza, V; Di Pierro, F; Doll, P; Engel, R; Falcke, H; Fuchs, B; Fuhrmann, D; Gemmeke, H; Grupen, C; Haungs, A; Heck, D; Hörandel, J R; Horneffer, A; Huege, T; Isar, P G; Kampert, K H; Kang, D; Krömer, O; Kuijpers, J; Link, K; ?uczak, P; Ludwig, M; Mathes, H J; Melissas, M; Morello, C; Oehlschläger, J; Palmieri, N; Pierog, T; Rautenberg, J; Rebel, H; Roth, M; Rühle, C; Saftoiu, A; Schieler, H; Schmid, A; Schröder, F G; Sima, O; Toma, G; Trinchero, G C; Weindl, A; Wochele, J; Wommer, M; Zabierowski, J; Zensus, J A

2013-01-01T23:59:59.000Z

306

3D Diagnostic Of Complex Plasma  

SciTech Connect

This paper reports the development of a three-dimensional(3D) dust particle position diagnostic for complex plasmas. A beam produce by Light Emitting Diodes(LEDs) is formed into horizontal sheet, for the illumination of the particles. The light sheet has a vertical colour gradient across its width, from two opposing colours. The light scattered from the particles is imaged with the camera from above. The horizontal coordinates are measured from the positions on the image. The third coordinate is determined from the colour which represents a position on the gradient of the light sheet. The use of LEDs as a light source reduces a variation in Mie scattered intensity from the particles due to the particle size distribution. The variation would induce a large vertical positional error.

Hall, Edward; Samsonov, Dmitry [Department of Electrical Engineering and Electronics, University of Liverpool, L69 3BX (United Kingdom)

2011-11-29T23:59:59.000Z

307

Incorporating Spatial Information into Density Estimates and Street Gang Models  

E-Print Network (OSTI)

Agent-Based Models . . . . . . . . . .of networks in an agent-based model. Physical Review E, 66(and H. J. Herrmann. Agent-based model for friendship in

Smith, Laura

2012-01-01T23:59:59.000Z

308

Validation for 2D/3D registration I: A new gold standard data set  

Science Conference Proceedings (OSTI)

Purpose: In this article, the authors propose a new gold standard data set for the validation of two-dimensional/three-dimensional (2D/3D) and 3D/3D image registration algorithms. Methods: A gold standard data set was produced using a fresh cadaver pig head with attached fiducial markers. The authors used several imaging modalities common in diagnostic imaging or radiotherapy, which include 64-slice computed tomography (CT), magnetic resonance imaging using Tl, T2, and proton density sequences, and cone beam CT imaging data. Radiographic data were acquired using kilovoltage and megavoltage imaging techniques. The image information reflects both anatomy and reliable fiducial marker information and improves over existing data sets by the level of anatomical detail, image data quality, and soft-tissue content. The markers on the 3D and 2D image data were segmented using ANALYZE 10.0 (AnalyzeDirect, Inc., Kansas City, KN) and an in-house software. Results: The projection distance errors and the expected target registration errors over all the image data sets were found to be less than 2.71 and 1.88 mm, respectively. Conclusions: The gold standard data set, obtained with state-of-the-art imaging technology, has the potential to improve the validation of 2D/3D and 3D/3D registration algorithms for image guided therapy.

Pawiro, S. A.; Markelj, P.; Pernus, F.; Gendrin, C.; Figl, M.; Weber, C.; Kainberger, F.; Noebauer-Huhmann, I.; Bergmeister, H.; Stock, M.; Georg, D.; Bergmann, H.; Birkfellner, W. [Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, AKH-4L, Waehringer Guertel 18-20, Vienna A-1090 (Austria); Laboratory of Imaging Technologies, Faculty of Electrical Engineering, University of Ljubljana, Trzaska Cesta 25, Ljubljana SI-1000 (Slovenia); Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, AKH-4L, Waehringer Guertel 18-20, Vienna A-1090 (Austria); University Clinic of Radiology, Division of Osteoradiology, Medical University of Vienna, AKH-4L, Waehringer Guertel 18-20, Vienna A-1090 (Austria); Department of Biomedical Research, Medical University Vienna, AKH-4L, Waehringer Guertel 18-20, Vienna A-1090 (Austria); University Clinic of Radiotherapy, Division of Medical Radiation Physics, Medical University of Vienna, Waehringer Guertel 18-20, AKH, Vienna A-1090 (Austria); Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, AKH-4L, Waehringer Guertel 18-20, Vienna A-1090 (Austria)

2011-03-15T23:59:59.000Z

309

Parameterization and Analysis of 3-D Solar Radiative Transfer in Clouds: Final Report  

Science Conference Proceedings (OSTI)

This document reports on the research that we have done over the course of our two-year project. The report also covers the research done on this project during a 1 year no-cost extension of the grant. Our work has had two main, inter-related thrusts: The first thrust was to characterize the response of stratocumulus cloud structure and dynamics to systematic changes in cloud infrared radiative cooling and solar heating using one-dimensional radiative transfer models. The second was to couple a three-dimensional (3-D) solar radiative transfer model to the Large Eddy Simulation (LES) model that we use to simulate stratocumulus. The purpose of the studies with 3-D radiative transfer was to examine the possible influences of 3-D photon transport on the structure, evolution, and radiative properties of stratocumulus. While 3-D radiative transport has been examined in static cloud environments, few studies have attempted to examine whether the 3-D nature of radiative absorption and emission influence the structure and evolution of stratocumulus. We undertook this dual approach because only a small number of LES simulations with the 3-D radiative transfer model are possible due to the high computational costs. Consequently, LES simulations with a 1-D radiative transfer solver were used in order to examine the portions of stratocumulus parameter space that may be most sensitive to perturbations in the radiative fields. The goal was then to explore these sensitive regions with LES using full 3-D radiative transfer. Our overall goal was to discover whether 3-D radiative processes alter cloud structure and evolution, and whether this may have any indirect implications for cloud radiative properties. In addition, we collaborated with Dr. Tamas Varni, providing model output fields for his attempt at parameterizing 3-D radiative effects for cloud models.

Jerry Y. Harrington

2012-09-21T23:59:59.000Z

310

Streamlining of the RELAP5-3D Code  

Science Conference Proceedings (OSTI)

RELAP5-3D is widely used by the nuclear community to simulate general thermal hydraulic systems and has proven to be so versatile that the spectrum of transient two-phase problems that can be analyzed has increased substantially over time. To accommodate the many new types of problems that are analyzed by RELAP5-3D, both the physics and numerical methods of the code have been continuously improved. In the area of computational methods and mathematical techniques, many upgrades and improvements have been made decrease code run time and increase solution accuracy. These include vectorization, parallelization, use of improved equation solvers for thermal hydraulics and neutron kinetics, and incorporation of improved library utilities. In the area of applied nuclear engineering, expanded capabilities include boron and level tracking models, radiation/conduction enclosure model, feedwater heater and compressor components, fluids and corresponding correlations for modeling Generation IV reactor designs, and coupling to computational fluid dynamics solvers. Ongoing and proposed future developments include improvements to the two-phase pump model, conversion to FORTRAN 90, and coupling to more computer programs. This paper summarizes the general improvements made to RELAP5-3D, with an emphasis on streamlining the code infrastructure for improved maintenance and development. With all these past, present and planned developments, it is necessary to modify the code infrastructure to incorporate modifications in a consistent and maintainable manner. Modifying a complex code such as RELAP5-3D to incorporate new models, upgrade numerics, and optimize existing code becomes more difficult as the code grows larger. The difficulty of this as well as the chance of introducing errors is significantly reduced when the code is structured. To streamline the code into a structured program, a commercial restructuring tool, FOR_STRUCT, was applied to the RELAP5-3D source files. The methodology employed follows Dijkstra's structured programming paradigm, which is based on splitting programs into sub-sections, each with single points of entry and exit and in which control is passed downward through the structure with no unconditional branches to higher levels. GO TO commands are typically avoided, since they alter the flow and control of a program’s execution by allowing a jump from one place in the routine to another. The restructuring of RELAP5-3D subroutines is complicated by several issues. The first is use of code other than standard FORTRAN77. The second is restructuring limitations of FOR_STRUCT. The third is existence of pre-compiler directives and the complication of nested directives. Techniques were developed to overcome all these difficulties and more and these are reported. By implementing these developments, all subroutines of RELAP were restructured. Measures of code improvement relative to maintenance and development are presented.

Mesina, George L; Hykes, Joshua; Guillen, Donna Post

2007-11-01T23:59:59.000Z

311

Modeling Density Effects in CO2 Injection in Oil Reservoirs and A Case Study of CO2 Sequestration in a Qatari Saline Aquifer  

E-Print Network (OSTI)

CO2 injection has been used to improve oil recovery for several decades. In recent years, CO2 injection has become even more attractive because of a dual effect; injection in the subsurface 1) allows reduction of CO2 concentration in the atmosphere to reduce global warming, and 2) improves the oil recovery. In this study, the density effect from CO2 dissolution in modeling of CO2 injection is examined. A method to model the increase in oil density with CO2 dissolution using the Peng-Robinson equation of state and the Pedersen viscosity correlation is presented. This method is applied to model the observed increase in oil density with CO2 dissolution in a West Texas crude oil. Compositional simulation of CO2 injection was performed in a 2D vertical cross section and a 3D reservoir with the density effect. The results show that the density increase from CO2 dissolution may have a drastic effect on CO2 flow path and recovery performance. One main conclusion from this work is that there is a need to have accurate density data for CO2/oil mixtures at different CO2 concentrations to ensure successful CO2 injection projects. While CO2 enhanced oil recovery (EOR) is part of the solution, saline aquifers have the largest potential for CO2 sequestration. A literature review of the CO2 sequestration in saline aquifers is performed. The dominant trapping mechanisms and transport processes and the methods used to model them are discussed in detail. The Aruma aquifer, a shallow saline aquifer in southwest Qatar is used as a case study for CO2 sequestration. A compositional simulation model is prepared for the Aruma aquifer using the available log data and flow test data. It was found that the grid size is a key parameter in modeling CO2 sequestration accurately. It affects the propagation of the CO2 plume and amount of CO2 dissolved in brine.

Ahmed, Tausif

2011-08-01T23:59:59.000Z

312

An h-Adaptive Finite-Element Technique for Constructing 3D Wind Fields  

Science Conference Proceedings (OSTI)

An h-adaptive, mass-consistent finite-element model (FEM) has been developed for constructing 3D wind fields over irregular terrain utilizing sparse meteorological tower data. The element size in the computational domain is dynamically controlled ...

Darrell W. Pepper; Xiuling Wang

2009-03-01T23:59:59.000Z

313

Sensitivity Analysis of a 3D Convective Storm: Implications for Variational Data Assimilation and Forecast Error  

Science Conference Proceedings (OSTI)

In this study a nonhydrostatic 3D cloud model, along with an automatic differentiation tool, is used to investigate the sensitivity of a supercell storm to prescribed errors (perturbations) in the water vapor field. The evolution of individual ...

Seon Ki Park; Kelvin K. Droegemeier

2000-01-01T23:59:59.000Z

314

3D Atlas vertical plate oil transmission line field calculations. Final report  

DOE Green Energy (OSTI)

Because of questions regarding current density and inductance estimates of the Atlas oil transmission line in the region where the vertical plates connect to the disk line, calculations using the 3D FE program Flux3d were initiated. Flux3d inductance values are nearly that estimated by D. Scudder. Calculations for three base designs of E. Ballard and D. Pierce were completed where several variations for each base design were used to determine the important parameters affecting inductance and to check inductance consistency. Flux3d showed for the first base design a very high current density of 36MA/m at the connection between the vertical and horizontal ground plates resulting in a magnetic pressure of 120 kpsi. The second base design modified this connection to reduce the current density to 20MA/m and 36 kpsi and for design 3 current density is 17MA/m. Maximum current density on the hot plates is 20MA/m for all 3 designs. These values assumed 1.2MA per VTL or 45.6MA total system current. Electrical fields on the top of the hot plate near the disk line connection is about 50% greater than the nominal value near the center of the vertical plates.

NONE

1997-09-18T23:59:59.000Z

315

Uncertainty Analysis of RELAP5-3D  

SciTech Connect

As world-wide energy consumption continues to increase, so does the demand for the use of alternative energy sources, such as Nuclear Energy. Nuclear Power Plants currently supply over 370 gigawatts of electricity, and more than 60 new nuclear reactors have been commissioned by 15 different countries. The primary concern for Nuclear Power Plant operation and lisencing has been safety. The safety of the operation of Nuclear Power Plants is no simple matter- it involves the training of operators, design of the reactor, as well as equipment and design upgrades throughout the lifetime of the reactor, etc. To safely design, operate, and understand nuclear power plants, industry and government alike have relied upon the use of best-estimate simulation codes, which allow for an accurate model of any given plant to be created with well-defined margins of safety. The most widely used of these best-estimate simulation codes in the Nuclear Power industry is RELAP5-3D. Our project focused on improving the modeling capabilities of RELAP5-3D by developing uncertainty estimates for its calculations. This work involved analyzing high, medium, and low ranked phenomena from an INL PIRT on a small break Loss-Of-Coolant Accident as wall as an analysis of a large break Loss-Of- Coolant Accident. Statistical analyses were performed using correlation coefficients. To perform the studies, computer programs were written that modify a template RELAP5 input deck to produce one deck for each combination of key input parameters. Python scripting enabled the running of the generated input files with RELAP5-3D on INL’s massively parallel cluster system. Data from the studies was collected and analyzed with SAS. A summary of the results of our studies are presented.

Alexandra E Gertman; Dr. George L Mesina

2012-07-01T23:59:59.000Z

316

Asymptotic Behavior of the Stock Price Distribution Density and Implied Volatility in Stochastic Volatility Models  

Science Conference Proceedings (OSTI)

We study the asymptotic behavior of distribution densities arising in stock price models with stochastic volatility. The main objects of our interest in the present paper are the density of time averages of the squared volatility process and the density of the stock price process in the Stein-Stein and the Heston model. We find explicit formulas for leading terms in asymptotic expansions of these densities and give error estimates. As an application of our results, sharp asymptotic formulas for the implied volatility in the Stein-Stein and the Heston model are obtained.

Gulisashvili, Archil, E-mail: guli@math.ohiou.ed [Ohio University, Department of Mathematics (United States); Stein, Elias M., E-mail: stein@math.princeton.ed [Princeton University, Department of Mathematics (United States)

2010-06-15T23:59:59.000Z

317

3D Visualization of Water Transport in Ferns  

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

3D Visualization of Water Transport in Ferns 3D Visualization of Water Transport in Ferns Print Monday, 08 April 2013 00:00 Plants transport water through elongated cells called...

318

Software: VARI3D - Nuclear Engineering Division (Argonne)  

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

OutLoud on Nuclear Energy Argonne Energy Showcase 2012 Software VARI3D (Perturbation Theory Codes) Bookmark and Share Standard Code Description VARI3D is a generalized...

319

Software: DIF3D-K - Nuclear Engineering Division (Argonne)  

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

Nuclear Energy Argonne Energy Showcase 2012 Software DIF3D-K (Diffusion and Transport Theory Codes) Bookmark and Share Standard Code Description Name of Program: DIF3D-K 1.5: A...

320

3-D Tin-Carbon Fiber Paper Electrodes for Electrochemically ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2012. Symposium, Energy Storage: Materials, Systems and Applications. Presentation Title, 3-D ...

Note: This page contains sample records for the topic "3-d density model" from the National Library of EnergyBeta (NLEBeta).
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321

Novel Metamaterial 'Flat Lens' Creates 3D Images in Free ...  

Science Conference Proceedings (OSTI)

Novel Metamaterial 'Flat Lens' Creates 3D Images in Free Space. From NIST Tech Beat: May 28, 2013. ...

2013-05-29T23:59:59.000Z

322

3Book: a 3D electronic smart book  

Science Conference Proceedings (OSTI)

This paper describes the 3Book, a 3D interactive visualization of a codex book as a component for various digital library and sensemaking systems. The book is designed to hold large books and to support sensemaking operations by readers. The book includes ... Keywords: 3D UI, 3D books, eBooks, electronic publishing, sensemaking, spreading activation

Stuart K. Card; Lichan Hong; Jock D. Mackinlay; Ed H. Chi

2004-05-01T23:59:59.000Z

323

Underwater Localization in Sparse 3D Acoustic Sensor Networks  

E-Print Network (OSTI)

Underwater Localization in Sparse 3D Acoustic Sensor Networks Wei Cheng1,2, Amin Y. Teymorian the localization problem in sparse 3D underwater sensor networks. Considering the fact that depth information is typically available for underwater sensors, we transform the 3D underwater positioning problem into its two

Cheng, Xiuzhen "Susan"

324

Keypoint identification and feature-based 3D face recognition  

Science Conference Proceedings (OSTI)

We present a feature-based 3D face recognition algorithm and propose a keypoint identification technique which is repeatable and identifies keypoints where shape variation is high in 3D faces. Moreover, a unique 3D coordinate basis can be defined locally ...

Ajmal Mian; Mohammed Bennamoun; Robyn Owens

2007-08-01T23:59:59.000Z

325

Natural Language Generation Journeys to Interactive 3D Worlds  

E-Print Network (OSTI)

physical devices must be clearly explained. NLG delivered with speech synthesis will need to be care- fully of interactive 3D worlds: self- explaining 3D environments, habitable 3D learning en- vironments,and interactive3. Kenan Institute for Engineering, Technology and Science and a corporate gift from Novell, Inc

Lester, James C.

326

3D ultrasound imaging for prosthesis fabrication and diagnostic imaging  

SciTech Connect

The fabrication of a prosthetic socket for a below-the-knee amputee requires knowledge of the underlying bone structure in order to provide pressure relief for sensitive areas and support for load bearing areas. The goal is to enable the residual limb to bear pressure with greater ease and utility. Conventional methods of prosthesis fabrication are based on limited knowledge about the patient`s underlying bone structure. A 3D ultrasound imaging system was developed at Sandia National Laboratories. The imaging system provides information about the location of the bones in the residual limb along with the shape of the skin surface. Computer assisted design (CAD) software can use this data to design prosthetic sockets for amputees. Ultrasound was selected as the imaging modality. A computer model was developed to analyze the effect of the various scanning parameters and to assist in the design of the overall system. The 3D ultrasound imaging system combines off-the-shelf technology for image capturing, custom hardware, and control and image processing software to generate two types of image data -- volumetric and planar. Both volumetric and planar images reveal definition of skin and bone geometry with planar images providing details on muscle fascial planes, muscle/fat interfaces, and blood vessel definition. The 3D ultrasound imaging system was tested on 9 unilateral below-the- knee amputees. Image data was acquired from both the sound limb and the residual limb. The imaging system was operated in both volumetric and planar formats. An x-ray CT (Computed Tomography) scan was performed on each amputee for comparison. Results of the test indicate beneficial use of ultrasound to generate databases for fabrication of prostheses at a lower cost and with better initial fit as compared to manually fabricated prostheses.

Morimoto, A.K.; Bow, W.J.; Strong, D.S. [and others

1995-06-01T23:59:59.000Z

327

Ultra Wideband 3-D Ground Penetrating Radar  

Jupiter Laser Facility. National Atmospheric Release Advisory Center. Program for Climate Model Diagnosis & Intercomparison. Site 300. Terascale Simulation Facility.

328

Circulation in the Alboran See as Determined by Quasi-Synoptic Hydrographic Observations. Part II: Mesoscale Ageostrophic Motion Diagnosed through Density Dynamical Assimilation  

Science Conference Proceedings (OSTI)

The 3D velocity field in the Alboran Sea (Western-Mediterranean) is diagnosed through density dynamical assimilation in a primitive equation (PE) model with mesoscale resolution. The ageostrophic motion is computed from fields produced by short-...

Álvaro Viúdez; Robert L. Haney; Joaquín Tintoré

1996-05-01T23:59:59.000Z

329

Natural and Enhanced Attenuation of Chlorinated Solvents Using RT3D  

SciTech Connect

RT3D (Reactive Transport in 3-Dimensions) is a reactive transport code that can be applied to model solute fate and transport for many different purposes. This document specifically addresses application of RT3D for modeling related to evaluation and implementation of Monitored Natural Attenuation (MNA). Selection of MNA as a remedy requires an evaluation process to demonstrate that MNA will meet the remediation goals. The U.S. EPA, through the Office of Solid Waste and Emergency Response (OSWER) Directive 9200.4?17P, provides the regulatory context for the evaluation and implementation of MNA. In a complementary fashion, the context for using fate and transport modeling as part of MNA evaluation is described in the EPA?s technical protocol for chlorinated solvent MNA, the Scenarios Evaluation Tool for Chlorinated Solvent MNA, and in this document. The intent of this document is to describe (1) the context for applying RT3D for chlorinated solvent MNA and (2) the attenuation processes represented in RT3D, (3) dechlorination reactions that may occur, and (4) the general approach for using RT3D reaction modules (including a summary of the RT3D reaction modules that are available) to model fate and transport of chlorinated solvents as part of MNA or for combinations of MNA and selected types of active remediation.

Johnson, Christian D.; Truex, Michael J.; Clement, T P.

2006-07-25T23:59:59.000Z

330

Fission Cross Section Calculation Using TALYS Based on Two Different Level Density Models  

Science Conference Proceedings (OSTI)

Fission cross sections in statistical model of fission are calculated using one of important parameter such as transmission coefficients. This parameter calculated using optical model parameter and level density. There are several models of level density that can be used to predict fission cross section. They are Constant Temperature Model, Fermi Gas Model, Back-Shifted Fermi Gas Model, and Generalized Superfluid Model. In this work, fission cross section would be calculated using two different model of level density, such as Constant Temperature Model Plus Fermi Gas and Generalized Superfluid Model on Th-232 (n,f) fission reaction. Calculation result from two different model then would be compared with experimental data from ENDF B/VI. Analysis of result would lead to the conclusion of spesific characteristic for each model in every fission cases. This work has became a preliminary study to calculate fission cross section using different set of level density models. Further work will be implemented to calculate similar fission cross section using level density parameter that approximated by Thermal wavelength [see 21].

Kurniadi, R.; Basar, K.; Waris, A. [Nuclear Physics and Biophysics Research Group, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesa 10 Bandung 40132 (Indonesia); Perkasa, Yudha S. [Department of Physics, Jl. Ganesa 10 Bandung 40132 (Indonesia); Nuclear Physics and Biophysics Research Group, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesa 10 Bandung 40132 (Indonesia)

2010-06-22T23:59:59.000Z

331

Three-dimensional model for multi-component reactive transport with variable density groundwater flow  

Science Conference Proceedings (OSTI)

PHWAT is a new model that couples a geochemical reaction model (PHREEQC-2) with a density-dependent groundwater flow and solute transport model (SEAWAT) using the split-operator approach. PHWAT was developed to simulate multi-component reactive transport ... Keywords: Cation exchange, Coastal groundwater flow and chemical transport/reaction, Density-dependent flow, MODFLOW, MT3DMS, PHREEQC-2, PHWAT, SEAWAT, Seawater intrusion, Snow-plough effect

X. Mao; H. Prommer; D. A. Barry; C. D. Langevin; B. Panteleit; L. Li

2006-05-01T23:59:59.000Z

332

Evaluating Density Forecasts: Forecast Combinations, Model Mixtures, Calibration and Sharpness  

E-Print Network (OSTI)

In a recent article Gneiting, Balabdaoui and Raftery (JRSSB, 2007) propose the criterion of sharpness for the evaluation of predictive distributions or density forecasts. They motivate their proposal by an example in which standard evaluation procedures based on probability integral transforms cannot distinguish between the ideal forecast and several competing forecasts. In this paper we show that their example has some unrealistic features from the perspective of the time-series forecasting literature, hence it is an insecure foundation for their argument that existing calibration procedures are inadequate in practice. We present an alternative, more realistic example in which relevant statistical methods, including information-based methods, provide the required discrimination between competing forecasts. We conclude that there is no need for a subsidiary criterion of sharpness.

James Mitchell; Kenneth F. Wallis

2008-01-01T23:59:59.000Z

333

New results on the resistivity structure of Merapi Volcano(Indonesia), derived from 3D restricted inversion of long-offsettransient electromagnetic data  

SciTech Connect

Three long-offset transient electromagnetic (LOTEM) surveyswerecarried out at the active volcano Merapi in Central Java (Indonesia)during the years 1998, 2000, and 2001. The measurements focused on thegeneral resistivity structure of the volcanic edifice at depths of 0.5-2km and the further investigation of a southside anomaly. The measurementswere insufficient for a full 3D inversion scheme, which could enable theimaging of finely discretized resistivity distributions. Therefore, astable, damped least-squares joint-inversion approach is used to optimize3D models with a limited number of parameters. The mode ls feature therealistic simulation of topography, a layered background structure, andadditional coarse 3D blocks representing conductivity anomalies.Twenty-eight LOTEM transients, comprising both horizontal and verticalcomponents of the magnetic induction time derivative, were analyzed. Inview of the few unknowns, we were able to achieve reasonable data fits.The inversion results indicate an upwelling conductor below the summit,suggesting hydrothermal activity in the central volcanic complex. Ashallow conductor due to a magma-filled chamber, at depths down to 1 kmbelow the summit, suggested by earlier seismic studies, is not indicatedby the inversion results. In conjunction with an anomalous-density model,derived from arecent gravity study, our inversion results provideinformation about the southern geological structure resulting from amajor sector collapse during the Middle Merapi period. The density modelallows to assess a porosity range andthus an estimated vertical salinityprofile to explain the high conductivities on a larger scale, extendingbeyond the foothills of Merapi.

Commer, Michael; Helwig, Stefan, L.; Hordt, Andreas; Scholl,Carsten; Tezkan, Bulent

2006-06-14T23:59:59.000Z

334

Gravity modeling of 21/2-D sedimentary basins - a case of variable density contrast  

Science Conference Proceedings (OSTI)

An algorithm and associated codes are developed to determine the depths to bottom of a 2^1^/^2-D sedimentary basin in which the density contrast varies parabolically with depth. This algorithm estimates initial depths of a sedimentary basin automatically ... Keywords: Basement, Gravity anomaly, Modeling, Parabolic density profile, Sedimentary basin

V. Chakravarthi; N. Sundararajan

2005-08-01T23:59:59.000Z

335

Urban Behavioral Simulation and 3D Visualization  

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

UrbanSim is a micro-simulation model system that represents the location choices of households and firms within the region, and the choices of real estate developers to construct...

336

3D-Simulation Studies of SNS Ring Doublet Magnets  

SciTech Connect

The accumulator ring of the Spallation Neutron Source (SNS) at ORNL employs in its straight sections closely packed quadrupole doublemagnets with large aperture of R=15.1 cm an relatively short iron-to-iron distance of 51.4 cm. These quads have much extended fringe field, and magnetic interferences among them in the doublet assemblies is not avoidable. Though each magnet in the assemblies has been individually mapped to high accuracy of lower than 0.01 percent level, the experimental data including the magnetic interference effect will not be available. We have performed 3D computing simulations on a quadrupole doublet model in order to assess the degree of the interference and to obtain relevant data for the SNS commissioning and operation.

Wang, J.G.; Tsoupas N.; Venturini, M.

2005-05-05T23:59:59.000Z

337

A 3D Magnetic Structure Of Izu-Oshima Volcano And Their Changes After The  

Open Energy Info (EERE)

Magnetic Structure Of Izu-Oshima Volcano And Their Changes After The Magnetic Structure Of Izu-Oshima Volcano And Their Changes After The Eruption In 1986 As Estimated From Repeated Airborne Magnetic Surveys Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A 3D Magnetic Structure Of Izu-Oshima Volcano And Their Changes After The Eruption In 1986 As Estimated From Repeated Airborne Magnetic Surveys Details Activities (0) Areas (0) Regions (0) Abstract: A 3D magnetic inversion method using a conjugate gradient method (CG method) was developed for constructing 3D magnetization models of a volcanic edifice and applied to aeromagnetic anomalies of Izu-Oshima Volcano surveyed in 1986 and in 1997. The calculated results of the 1986 data show that the volcanic edifice of Izu-Oshima Volcano has a mean magnetization intensity ranging from 10.4 to 12.1 A/m. The derived 3D

338

Application Of 3D Inversion To Magnetotelluric Data In The Ogiri Geothermal  

Open Energy Info (EERE)

Of 3D Inversion To Magnetotelluric Data In The Ogiri Geothermal Of 3D Inversion To Magnetotelluric Data In The Ogiri Geothermal Area, Japan Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Application Of 3D Inversion To Magnetotelluric Data In The Ogiri Geothermal Area, Japan Details Activities (0) Areas (0) Regions (0) Abstract: A stable inversion technique has been developed for threedimensional (3D) interpretation of magnetotelluric (MT) data. The inversion method is based on the Gauss-Newton (linearized least-squares) method with smoothness regularization. Static shifts are also treated as unknown parameters in the inversion. The forward modeling is done by using the staggered-grid finite difference method. A Bayesian criterion ABIC is applied to searching for the optimum trade-off among the minimization of

339

3-D Interpretation Of Magnetotelluric Data At The Bajawa Geothermal Field,  

Open Energy Info (EERE)

3-D Interpretation Of Magnetotelluric Data At The Bajawa Geothermal Field, 3-D Interpretation Of Magnetotelluric Data At The Bajawa Geothermal Field, Indonesia Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: 3-D Interpretation Of Magnetotelluric Data At The Bajawa Geothermal Field, Indonesia Details Activities (0) Areas (0) Regions (0) Abstract: Three-dimensional (3-D) interpretation was carried out for the magnetotelluric (MT) data obtained in a geothermal area in Indonesia. The inversion scheme was based on the linearized leastsquares method with smoothness regularization. In addition to the subsurface resistivity structure, static shifts were also included as unknown parameters in the inversion. Forward modeling was by the finite difference scheme. The sensitivity matrix was computed once for a homogeneous half space and used

340

Photo of the Week: Improving Power Plant Technology... in 3-D | Department  

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

Improving Power Plant Technology... in 3-D Improving Power Plant Technology... in 3-D Photo of the Week: Improving Power Plant Technology... in 3-D June 6, 2013 - 12:58pm Addthis This week, Secretary Ernest Moniz experienced the 3-D visualizations at the Consortium for the Advanced Simulation of Light Water Reactors (CASL), one of the Department's Energy Innovation Hubs. The facility, located at Oak Ridge National Laboratory, develops computer models that simulate nuclear power plant operations. The researchers at CASL are developing technology that could accelerate upgrades at existing nuclear plants while improving the plants' reliability and safety. Check out more photos from Secretary Moniz's visit to CASL. | Photo courtesy of Oak Ridge National Laboratory.

Note: This page contains sample records for the topic "3-d density 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

Nonlinear eigenvalue problems in Density Functional Theory calculations  

SciTech Connect

Developed in the 1960's by W. Kohn and coauthors, Density Functional Theory (DFT) is a very popular quantum model for First-Principles simulations in chemistry and material sciences. It allows calculations of systems made of hundreds of atoms. Indeed DFT reduces the 3N-dimensional Schroedinger electronic structure problem to the search for a ground state electronic density in 3D. In practice it leads to the search for N electronic wave functions solutions of an energy minimization problem in 3D, or equivalently the solution of an eigenvalue problem with a non-linear operator.

Fattebert, J

2009-08-28T23:59:59.000Z

342

Hydrodynamical modeling of targets compression to high densities  

E-Print Network (OSTI)

by composite schemes on moving grid. Both models also include heat conductivity. The quotidian equation, E is total energy and heat flux W is given by W = - grad T (2) where T is temperature and is heat note that for most presented computations the heat conductivity is negligible. The above system

Limpouch, Jiri

343

A Numerical Modeling Study of the Propagation of Idealized Sea-Breeze Density Currents  

Science Conference Proceedings (OSTI)

Sea breezes are often modeled as a wave response to transient heating in a stratified environment. They occur, however, as density currents with well-defined fronts, the understanding of which rests primarily on experiments and theory that do not ...

F. J. Robinson; M. D. Patterson; S. C. Sherwood

2013-02-01T23:59:59.000Z

344

A Density Current Parameterization Coupled with Emanuel’s Convection Scheme. Part I: The Models  

Science Conference Proceedings (OSTI)

The aim of the present series of papers is to develop a density current parameterization for global circulation models. This first paper is devoted to the presentation of this new wake parameterization coupled with Emanuel’s convective scheme. ...

Jean-Yves Grandpeix; Jean-Philippe Lafore

2010-04-01T23:59:59.000Z

345

Model for Calculating Photosynthetic Photon Flux Densities in Forest Openings on Slopes  

Science Conference Proceedings (OSTI)

A model has been developed to calculate the spatial distribution of the photosynthetic photon flux density (PPFD) in elliptical forest openings of given slopes and orientations. The PPFD is separated into direct and diffuse components. The direct ...

Jing M. Chen; T. Andrew Black; David T. Price; Reid E. Carter

1993-10-01T23:59:59.000Z

346

3D Materials Science 2012: Housing and Travel  

Science Conference Proceedings (OSTI)

International Conference on 3D Materials Science 2012. July 8-12, 2012 • Seven Springs Mountain Resort • Seven Springs, Pennsylvania. Download Exhibits ...

347

3D Materials Science 2014: Housing and Travel - TMS  

Science Conference Proceedings (OSTI)

2nd International Congress on 3D Materials Science 2014. June 29 – July 2, 2014 • Annecy, France. CONGRESS LOCATION. Near Geneva, L'Impérial Palace ...

348

Engines - 3-D Animation Shows Complex Geometry of Diesel Particulates  

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

3-D Animation Shows Complex Geometry of Diesel Particulates Diesel particulate matter has a very complex geometry Most studies have observed these three-dimensional structures in...

349

Climate Change Capacity Development (C3D+) | Open Energy Information  

Open Energy Info (EERE)

C3D+) C3D+) Jump to: navigation, search Logo: Climate Change Capacity Development (C3D+) Name Climate Change Capacity Development (C3D+) Agency/Company /Organization United Nations Institute for Training and Research (UNITAR) Partner Caribbean Climate Change Community Centre (CCCCC), Climate System Analysis Group at UCT Cape Town (CSAG), Environment and Development Action in the Third World (ENDA-TM), University of Cape Town-Energy Research Centre, South Pacific Regional Environment Programme (SPREP), Munasinghe Institute (MIND), Center for International Forestry Research, International Institute for Sustainable Development (IISD), Stockholm Environment Institute Sector Climate Topics Low emission development planning Resource Type Training materials

350

Applications of 3D Experimental Techniques Across Length Scales  

Science Conference Proceedings (OSTI)

Jul 11, 2012... Experimental Techniques Across Length Scales: Non-Destructive Techniques .... The efficient image-processing pipeline provides a full 3D ...

351

Digital Representation of 3D Microstructures - Programmaster.org  

Science Conference Proceedings (OSTI)

Jul 10, 2012 ... Storage and Sharing of Large 3D Imaging Datasets: Richard Boardman1; Ian Sinclair1; Simon Cox1; Philippa Reed1; Kenji Takeda1; Jeremy ...

352

Supercapacitive Performance with Nanofibers on 3D-interconnected ...  

Science Conference Proceedings (OSTI)

The hierarchical 1D MnO2 nanofibers are grown by using a facile chemical bath deposition (CBD) method on 3D graphene foam. A synthesis of ...

353

Identificering af teknologi gennem narrativer; 3D print.  

E-Print Network (OSTI)

??Denne rapport arbejder med en gennemgang af den såkaldte 3D printer teknologi. Denne vil sættes i sammenhæng med et teknologifilosofisk ’form of life ? forståelse… (more)

Petersen, Mikael

2011-01-01T23:59:59.000Z

354

From Digital to Physical: Computational Aspects of 3D Manufacturing.  

E-Print Network (OSTI)

??The desktop publishing revolution of the 1980s is currently repeating itself in 3D, referred to as desktop manufacturing. Online services such as Shapeways have become… (more)

Baecher, Moritz Niklaus

2013-01-01T23:59:59.000Z

355

Vector Graphics for Real-time 3D Rendering.  

E-Print Network (OSTI)

??Algorithms are presented that enable the use of vector graphics representations of images in texture maps for 3D real time rendering. Vector graphics images are… (more)

Qin, Zheng

2009-01-01T23:59:59.000Z

356

RELAP5-3D V. 4.X.X  

Energy Science and Technology Software Center (OSTI)

000191MLTPL01 NON-NRC FUNDED RELAP5-3D VERSION 4.x.x SOFTWARE REACTOR EXCURSION AND LEAK ANALYSIS PACKAGE - THREE DIMENSIONAL   

357

3D and 4D Characterization and Evaluation  

Science Conference Proceedings (OSTI)

Aug 8, 2013 ... Here, we present a novel X-ray microscope featuring high detector resolution, which enables 3D imaging of materials with micron-scale ...

358

Reconstruction of 3D Points From Uncalibrated Underwater Video.  

E-Print Network (OSTI)

??This thesis presents a 3D reconstruction software pipeline that is capable of generating point cloud data from uncalibrated underwater video. This research project was undertaken… (more)

Cavan, Neil

2011-01-01T23:59:59.000Z

359

Text from the http://web3d  

Science Conference Proceedings (OSTI)

... Sandy Ressler, of the Information Access Division, played a key role in ensuring that the Web3D Consortium and ISO Moving Picture Experts Group ...

360

MPSalsa 3D Simulations of Chemically Reacting Flows  

DOE Data Explorer (OSTI)

Many important scientific and engineering applications require a detailed analysis of complex systems with coupled fluid flow, thermal energy transfer, mass transfer and nonequilibrium chemical reactions. Currently, computer simulations of these complex reacting flow problems are limited to idealized systems in one or two spatial dimensions when coupled with a detailed, fundamental chemistry model. The goal of our research is to develop, analyze and implement advanced MP numerical algorithms that will allow high resolution 3D simulations with an equal emphasis on fluid flow and chemical kinetics modeling. In our research, we focus on the development of new, fully coupled, implicit solution strategies that are based on robust MP iterative solution methods (copied from http://www.cs.sandia.gov/CRF/MPSalsa/). These simulations are needed for scientific and technical areas such as: combustion research for transportation, atmospheric chemistry modeling for pollution studies, chemically reacting flow models for analysis and control of manufacturing processes, surface catalytic reactors for methane to methanol conversion and chemical vapor deposition (CVD) process modeling for production of advanced semiconductor materials (http://www.cs.sandia.gov/CRF/MPSalsa/).

This project website provides six QuickTime videos of these simulations, along with a small image gallery and slideshow animations. A list of related publications and conference presentations is also made available.

Note: This page contains sample records for the topic "3-d density 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.
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to obtain the most current and comprehensive results.


361

Training toward Advanced 3D Seismic Methods for CO2 Monitoring, Verification, and Accounting  

SciTech Connect

The objective of our work is graduate and undergraduate student training related to improved 3D seismic technology that addresses key challenges related to monitoring movement and containment of CO{sub 2}, specifically better quantification and sensitivity for mapping of caprock integrity, fractures, and other potential leakage pathways. We utilize data and results developed through previous DOE-funded CO{sub 2} characterization project (DE-FG26-06NT42734) at the Dickman Field of Ness County, KS. Dickman is a type locality for the geology that will be encountered for CO{sub 2} sequestration projects from northern Oklahoma across the U.S. midcontinent to Indiana and Illinois. Since its discovery in 1962, the Dickman Field has produced about 1.7 million barrels of oil from porous Mississippian carbonates with a small structural closure at about 4400 ft drilling depth. Project data includes 3.3 square miles of 3D seismic data, 142 wells, with log, some core, and oil/water production data available. Only two wells penetrate the deep saline aquifer. In a previous DOE-funded project, geological and seismic data were integrated to create a geological property model and a flow simulation grid. We believe that sequestration of CO{sub 2} will largely occur in areas of relatively flat geology and simple near surface, similar to Dickman. The challenge is not complex geology, but development of improved, lower-cost methods for detecting natural fractures and subtle faults. Our project used numerical simulation to test methods of gathering multicomponent, full azimuth data ideal for this purpose. Our specific objectives were to apply advanced seismic methods to aide in quantifying reservoir properties and lateral continuity of CO{sub 2} sequestration targets. The purpose of the current project is graduate and undergraduate student training related to improved 3D seismic technology that addresses key challenges related to monitoring movement and containment of CO{sub 2}, specifically better quantification and sensitivity for mapping of caprock integrity, fractures, and other potential leakage pathways. Specifically, our focus is fundamental research on (1) innovative narrow-band seismic data decomposition and interpretation, and (2) numerical simulation of advanced seismic data (multi-component, high density, full azimuth data) ideal for mapping of cap rock integrity and potential leakage pathways.

Christopher Liner

2012-05-31T23:59:59.000Z

362

ARM - PI Product - Large Scale Ice Water Path and 3-D Ice Water Content  

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

ProductsLarge Scale Ice Water Path and 3-D Ice Water ProductsLarge Scale Ice Water Path and 3-D Ice Water Content Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send PI Product : Large Scale Ice Water Path and 3-D Ice Water Content Site(s) SGP TWP General Description Cloud ice water concentration is one of the most important, yet poorly observed, cloud properties. Developing physical parameterizations used in general circulation models through single-column modeling is one of the key foci of the ARM program. In addition to the vertical profiles of temperature, water vapor and condensed water at the model grids, large-scale horizontal advective tendencies of these variables are also required as forcing terms in the single-column models. Observed horizontal advection of condensed water has not been available because the

363

3D visualization of port simulation.  

SciTech Connect

Affordable and realistic three dimensional visualization technology can be applied to large scale constructive simulations such as the port simulation model, PORTSIM. These visualization tools enhance the experienced planner's ability to form mental models of how seaport operations will unfold when the simulation model is implemented and executed. They also offer unique opportunities to train new planners not only in the use of the simulation model but on the layout and design of seaports. Simulation visualization capabilities are enhanced by borrowing from work on interface design, camera control, and data presentation. Using selective fidelity, the designers of these visualization systems can reduce their time and efforts by concentrating on those features which yield the most value for their simulation. Offering the user various observational tools allows the freedom to simply watch or engage in the simulation without getting lost. Identifying the underlying infrastructure or cargo items with labels can provide useful information at the risk of some visual clutter. The PortVis visualization expands the PORTSIM user base which can benefit from the results provided by this capability, especially in strategic planning, mission rehearsal, and training. Strategic planners will immediately reap the benefits of seeing the impact of increased throughput visually without keeping track of statistical data. Mission rehearsal and training users will have an effective training tool to supplement their operational training exercises which are limited in number because of their high costs. Having another effective training modality in this visualization system allows more training to take place and more personnel to gain an understanding of seaport operations. This simulation and visualization training can be accomplished at lower cost than would be possible for the operational training exercises alone. The application of PORTSIM and PortVis will lead to more efficient planning overall and ultimately increase port utilization and throughput, decreasing the amount of time required to transport cargo from its origin to its final destination.

Horsthemke, W. H.; Macal, C. M.; Nevins, M. R.

1999-06-14T23:59:59.000Z

364

GyPSuM: A Detailed Tomographic Model of Mantle Density and Seismic Wave Speeds  

SciTech Connect

GyPSuM is a tomographic model fo mantle seismic shear wave (S) speeds, compressional wave (P) speeds and detailed density anomalies that drive mantle flow. the model is developed through simultaneous inversion of seismic body wave travel times (P and S) and geodynamic observations while considering realistic mineral physics parameters linking the relative behavior of mantle properties (wave speeds and density). Geodynamic observations include the (up to degree 16) global free-air gravity field, divergence of the tectonic plates, dynamic topography of the free surface, and the flow-induced excess ellipticity of the core-mantle boundary. GyPSuM is built with the philosophy that heterogeneity that most closely resembles thermal variations is the simplest possible solution. Models of the density field from Earth's free oscillations have provided great insight into the density configuration of the mantle; but are limited to very long-wavelength solutions. Alternatively, simply scaling higher resolution seismic images to density anomalies generates density fields that do not satisfy geodynamic observations. The current study provides detailed density structures in the mantle while directly satisfying geodynamic observations through a joint seismic-geodynamic inversion process. Notable density field observations include high-density piles at the base of the superplume structures, supporting the fundamental results of past normal mode studies. However, these features are more localized and lower amplitude than past studies would suggest. When we consider all seismic anomalies in GyPSuM, we find that P and S-wave speeds are strongly correlated throughout the mantle. However, correlations between the high-velocity S zones in the deep mantle ({approx} 2000 km depth) and corresponding P-wave anomalies are very low suggesting a systematic divergence from simplified thermal effects in ancient subducted slab anomalies. Nevertheless, they argue that temperature variations are the primary cause of P-wave, S-wave, and density anomalies in the mantle.

Simmons, N A; Forte, A M; Boschi, L; Grand, S P

2010-03-30T23:59:59.000Z

365

Empirical models for Dark Matter Halos. I. Nonparametric Construction of Density Profiles and Comparison with Parametric Models  

E-Print Network (OSTI)

We use techniques from nonparametric function estimation theory to extract the density profiles, and their derivatives, from a set of N-body dark matter halos. We consider halos generated from LCDM simulations of gravitational clustering, as well as isolated, spherical collapses. The logarithmic density slopes gamma = d(log rho)/d(log r) of the LCDM halos are found to vary as power-laws in radius, reaching values of gamma ~ -1 at the innermost resolved radii (~0.01 r_virial). This behavior is significantly different from that of broken power-law models like the NFW profile, but similar to that of models like de Vaucouleurs'. Accordingly, we compare the N-body density profiles with various parametric models to find which provide the best fit. We consider an NFW-like model with arbitrary inner slope; Dehnen & McLaughlin's anisotropic model; Einasto's model (identical in functional form to Sersic's model but fit to the space density); and the density model of Prugniel & Simien that was designed to match the deprojected form of Sersic's R^{1/n} law. Overall, the best-fitting model to the LCDM halos is Einasto's, although the Prugniel-Simien and Dehnen-McLaughlin models also perform well. With regard to the spherical collapse halos, both the Prugniel-Simien and Einasto models describe the density profiles well, with an rms scatter some four times smaller than that obtained with either the NFW-like model or the 3-parameter Dehnen-McLaughlin model. Finally, we confirm recent claims of a systematic variation in profile shape with halo mass.

David Merritt; Alister W. Graham; Ben Moore; Juerg Diemand; Balsa Terzic

2005-09-15T23:59:59.000Z

366

Evaluating the X3D schema with semantic web tools  

Science Conference Proceedings (OSTI)

X3D has been evolving for nearly 20 years (counting the VRML era). This long period, covering a wide range of uses (Computer-Aided Design, medical, Geographic Information System ...) has led to a lot of possibly inconsistent or even conflicting features. ... Keywords: X3D, XML schema, ontology

Marc Petit; Henry Boccon-Gibod; Christophe Mouton

2012-08-01T23:59:59.000Z

367

Using projective invariant properties for efficient 3d reconstruction  

Science Conference Proceedings (OSTI)

3D reconstruction over long sequences has been to the main problem of computer vision. Projective reconstruction is known to be an important process for 3D reconstruction in Euclidean space. In this paper, we present a new projective reconstruction algorithm ...

Bo-Ra Seok; Yong-Ho Hwang; Hyun-Ki Hong

2005-07-01T23:59:59.000Z

368

Similarity based retrieval from a 3D human database  

Science Conference Proceedings (OSTI)

In this paper, we describe a framework for similarity based retrieval from a 3D human database. Our technique is based on both body and head shape representation and retrieval based on similarity of both of them. The 3D human database used in our study ... Keywords: body and head shape, human database, retrieval, similarity

Afzal Godil; Sandy Ressler

2005-07-01T23:59:59.000Z

369

A camcorder for 3D underwater reconstruction of archeological objects  

E-Print Network (OSTI)

A camcorder for 3D underwater reconstruction of archeological objects A. Meline1 , J. Triboulet1 Cedex 5, France 2 Université de Nîmes, Place Gabriele Péri, 30021 Nîmes, France Abstract- The underwater cartography has made great progress in the last decade. In this paper, we discuss of the 3D underwater

Paris-Sud XI, Université de

370

Middleware for streaming 3D progressive meshes over lossy networks  

Science Conference Proceedings (OSTI)

Streaming 3D graphics have been widely used in multimedia applications such as online gaming and virtual reality. However, a gap exists between the zero-loss-tolerance of the existing compression schemes and the lossy network transmissions. In this article, ... Keywords: 3D streaming, progressive compression

H. Li; M. Li; B. Prabhakaran

2006-11-01T23:59:59.000Z

371

Skeletal input for user interaction in X3D  

Science Conference Proceedings (OSTI)

Recent developments in depth sensor technology enable developers to use skeletal input in interactive 3D environments with high user fluctuation like museum exhibits. However, the question of how to use natural user input and body movement to control ... Keywords: Kinect, X3D, natural interaction

Manuel Olbrich; Tobias Franke; Jens Keil; Sven Hertling

2013-06-01T23:59:59.000Z

372

BeThere: 3D mobile collaboration with spatial input  

Science Conference Proceedings (OSTI)

We present BeThere, a proof-of-concept system designed to explore 3D input for mobile collaborative interactions. With BeThere, we explore 3D gestures and spatial input which allow remote users to perform a variety of virtual interactions ... Keywords: around device interaction, augmented reality, collaboration, depth sensors

Rajinder S. Sodhi; Brett R. Jones; David Forsyth; Brian P. Bailey; Giuliano Maciocci

2013-04-01T23:59:59.000Z

373

Power-Aware 3D Computer Graphics Rendering  

Science Conference Proceedings (OSTI)

Real-time 3D Graphics rendering consumes significant power because of its very high computation and memory access rate. Due to variation in workload and perceptual tolerance, power-awareness can optimize this power consumption significantly, thus facilitating ... Keywords: 3D Graphics, low-power, reconfigurable, shading, texture mapping

Jeongseon Euh; Jeevan Chittamuru; Wayne Burleson

2005-01-01T23:59:59.000Z

374

The unreal editor as a Web 3D authoring environment  

Science Conference Proceedings (OSTI)

Epic Games provides a free game level editor with titles based on its Unreal engine. The editor provides a rich set of authoring tools that can be used to create fully interactive environments. This paper describes a tool that converts Unreal levels ... Keywords: 3D, Unreal, VRML, X3D, authoring, game, tool

David Arendash

2004-04-01T23:59:59.000Z

375

Efficient Calculations of 3-D FFTs on Spiral Contours  

Science Conference Proceedings (OSTI)

This paper proposes a fast algorithm, called the SpiralFFT, that computes samples of the 3-D discrete Fourier transform of an object of interest along spiral contours in frequency space. This type of sampling geometry is prevalent in 3-D magnetic resonance ... Keywords: Chirp Z-transform, Nonuniform FFT, Spiral MRI

Christopher K. Turnes; Justin Romberg

2012-03-01T23:59:59.000Z

376

Implementation of a 3-D groundwater flow model in a semi-arid region using MODFLOW and GIS tools: The Zéramdine-Béni Hassen Miocene aquifer system (east-central Tunisia)  

Science Conference Proceedings (OSTI)

In this work, an integrated methodology was developed to investigate hydrological processes in Zeramdine-Beni Hassen Miocene aquifer and to validate the groundwater proprieties deduced from the geological, geophysical, hydrodynamic and hydrochemical ... Keywords: Geographic information system, Groundwater modeling, Hydrogeology, MODFLOW

Fethi Lachaal; Ammar Mlayah; Mourad BéDir; Jamila Tarhouni; Christian Leduc

2012-11-01T23:59:59.000Z

377

3D printing rises to the occasion | ornl.gov  

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

Features Features 2014 2013 2012 2011 2010 News Home | ORNL | News | Features | 2013 SHARE 3D printing rises to the occasion ORNL group shows how it's done, one layer at a time A perforated metal box produced by an Arcam 3D printer. This detailed A perforated metal box produced by an Arcam 3D printer. This detailed "calibration" part illustrates some of the versatility of 3D printing. Photo: Jason Richards (hi-res image) Things have come a long way since the mid-1980s when 3D Systems cofounder Chuck Hull worked out the technology to print objects in three dimensions, one very thin layer at a time. Hull called his new technology "stereolithography." In it, a guided beam of ultraviolet light is focused on a vat of liquid polymer, solidifying areas where it hits. When one layer is complete, the

378

Energy Savings in 3-D | ornl.gov  

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

Energy savings in 3-D Energy savings in 3-D ORNL researchers show production, energy advantages of additive manufacturing ORNL 3-D printer in use. ORNL 3-D printer in use. Researchers at the Department of Energy's Oak Ridge National Laboratory are working with aircraft makers to determine energy savings through the use of additive manufacturing, also known as 3-D printing. Sachin Nimbalkar and his ORNL colleagues are printing airplane parts to show additive manufacturing's potential as a technology that should be considered foundational to processes seeking more energy efficiency. Additive manufacturing builds products precisely, layer by layer, and is distinctly different from traditional subtractive manufacturing processes, which take raw material and cut it down into a desired shape and size.

379

IP4DI: A software for time-lapse 2D/3D DC-resistivity and induced polarization tomography  

Science Conference Proceedings (OSTI)

We propose a 2D/3D forward modelling and inversion package to invert direct current (DC)-resistivity, time-domain induced polarization (TDIP), and frequency-domain induced polarization (FDIP) data. Each cell used for the discretization of the 2D/3D problems ... Keywords: Induced polarization, Inversion, Resistivity, Time-lapse

M. Karaoulis, A. Revil, P. Tsourlos, D. D. Werkema, B. J. Minsley

2013-04-01T23:59:59.000Z

380

Multi-scale Simulation Methodology for Stress Assessment in 3D IC: Effect of Die Stacking on Device Performance  

Science Conference Proceedings (OSTI)

Potential challenges with managing mechanical stress distributions and the consequent effects on device performance for advanced 3D integrated circuit (IC) technologies are outlined. A set of physics-based compact models for a multi-scale simulation, ... Keywords: 3D IC, FEA, Layout, Packaging, Strain engineering, Stress, TSV

Valeriy Sukharev; Armen Kteyan; Jun-Ho Choy; Henrik Hovsepyan; Ara Markosian; Ehrenfried Zschech; Rene Huebner

2012-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

DYNA3D analysis of the DT-20 shipping container  

SciTech Connect

A DYNA3D model of the DT-20 shipping container was constructed. Impact onto a rigid steel surface at a velocity of 44 ft/sec (30 foot gravity drop) was studied. The orientation of most interest was a side-drop, but end and corner drops were also studied briefly. The assembly for the baseline side impact contained a 150 lb. payload. During this drop, the outer drum sustains plastic strains of up to 0.15, with most the deformation near the rim. The plywood/Celotex packing is crushed about 3 inches. The inner sealed can sees significant stresses, but barely reaches the onset of yielding in some local areas. Based on hand calculations, the bolts joining the can halves could see stresses near 50 ksi. It is felt that overall, the container should survive this drop. However, detailed modeling of the rim closure and the center bolted joint was not possible due to time constraints. Furthermore, better material models and properties are needed for the Celotex, plywood, and honeycomb in particular. 39 figs., 1 tab.

Logan, R.W.; Lovejoy, S.C.

1991-08-22T23:59:59.000Z

382

Simultaneous power and thermal integrity driven via stapling in 3D ICs  

Science Conference Proceedings (OSTI)

The existing work on via-stapling in 3D integrated circuits optimizes power and thermal integrity separately and uses steadystate thermal analysis. This paper presents the first in-depth study on simultaneous power and thermal integrity driven viastapling ... Keywords: structured and parameterized model order reduction, thermal modeling and management

Hao Yu; Joanna Ho; Lei He

2006-11-01T23:59:59.000Z

383

3D vector flow guided segmentation of airway wall in MSCT  

Science Conference Proceedings (OSTI)

This paper develops a 3D automated approach for airway wall segmentation and quantification inMSCT based on a patient-specific deformable model. The model is explicitly defined as a triangular surface mesh at the level of the airway lumen segmented from ...

Margarete Ortner; Catalin Fetita; Pierre-Yves Brillet; Françoise Prêteux; Philippe Grenier

2010-11-01T23:59:59.000Z

384

Journal of the Society for Simulation in Healthcare Generating Classes of 3D Virtual  

E-Print Network (OSTI)

models is the exposure to radiation for CT and the cost of 3D imaging for MRI, the main limitation acquisition process to capture information about the internal anatomy of a living patient. While scale models (e.g. lungs) within a 3 mm Root Mean Square (RMS) error with respect to the internal

Hamza-Lup, Felix G.

385

Blind separation of non-stationary sources using continuous density hidden Markov models  

Science Conference Proceedings (OSTI)

Blind source separation (BSS) has attained much attention in signal processing society due to its 'blind' property and wide applications. However, there are still some open problems, such as underdetermined BSS, noise BSS. In this paper, we propose a ... Keywords: Blind source separation, Continuous density hidden Markov model, Expectation-maximization, Gaussian mixture model, Non-stationary

Fanglin Gu, Hang Zhang, Desheng Zhu

2013-09-01T23:59:59.000Z

386

Density Currents in Shear Flows-A Two-Fluid Model  

Science Conference Proceedings (OSTI)

This paper develops a two-fluid steady-state model of a density current and its front propagating into a uniformly sheared environmental flow. This model is used to examine the kinematic and dynamic factors that control the depth and propagation ...

Qin Xu

1992-03-01T23:59:59.000Z

387

A Model for the Origin of High Density in Loop-top X-ray Sources  

E-Print Network (OSTI)

Super-hot looptop sources, detected in some large solar flares, are compact sources of HXR emission with spectra matching thermal electron populations exceeding 30 megakelvins. High observed emission measure, as well as inference of electron thermalization within the small source region, both provide evidence of high densities at the looptop; typically more than an order of magnitude above ambient. Where some investigators have suggested such density enhancement results from a rapid enhancement in the magnetic field strength, we propose an alternative model, based on Petschek reconnection, whereby looptop plasma is heated and compressed by slow magnetosonic shocks generated self-consistently through flux retraction following reconnection. Under steady conditions such shocks can enhance density by no more than a factor of four. These steady shock relations (Rankine-Hugoniot relations) turn out to be inapplicable to Petschek's model owing to transient effects of thermal conduction. The actual density enhancemen...

Longcope, D W

2011-01-01T23:59:59.000Z

388

A High-Throughput 3-D X-ray Microtomography System with Real-Time 3-D  

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

Throughput 3-D X-ray Microtomography System with Real-Time 3-D Throughput 3-D X-ray Microtomography System with Real-Time 3-D Reconstruction A high-throughput x-ray microtomography system (XMS) that can acquire, reconstruct, and interactively display rendered 3-D images of a sample at micrometer-scale resolution within minutes has been developed at Advanced Photon Source (APS) beamline 2-BM, which is managed by the Synchrotron Radiation Instrumentation Collaborative Access Team (SRI-CAT). This system could bring better understanding of an array of scientific and technological problems, ranging from failure in microelectronic devices to structures in biological samples. A rendered image from a three-dimensional tomographic reconstruction of a cricket, obtained with the x-ray microtomography system. The image has been digitally cut at different planes to show the internal structures of the cricket's head.

389

Modeled Salt Density for Nuclear Material Estimation in the Treatment of Spent Nuclear Fuel  

SciTech Connect

Spent metallic nuclear fuel is being treated in a pyrometallurgical process that includes electrorefining the uranium metal in molten eutectic LiCl-KCl as the supporting electrolyte. We report a model for determining the density of the molten salt. Inventory operations account for the net mass of salt and for the mass of actinides present. It was necessary to know the molten salt density but difficult to measure, and it was decided to model the salt density for the initial treatment operations. The model assumes that volumes are additive for the ideal molten salt solution as a starting point; subsequently a correction factor for the lanthanides and actinides was developed. After applying the correction factor, the percent difference between the net salt mass in the electrorefiner and the resulting modeled salt mass decreased from more than 4.0% to approximately 0.1%. As a result, there is no need to measure the salt density at 500 C for inventory operations; the model for the salt density is found to be accurate.

DeeEarl Vaden; Robert. D. Mariani

2010-09-01T23:59:59.000Z

390

Optimal cytoplasmatic density and flux balance model under macromolecular crowding effects  

E-Print Network (OSTI)

Macromolecules occupy between 34 and 44% of the cell cytoplasm, about half the maximum pack- ing density of spheres in three dimension. Yet, there is no clear understanding of what is special about this value. To address this fundamental question we investigate the effect of macromolecular crowding on cell metabolism. We develop a cell scale flux balance model capturing the main features of cell metabolism at different nutrient uptakes and macromolecular densities. Using this model we show there are two metabolic regimes at low and high nutrient uptakes. The latter regime is charac- terized by an optimal cytoplasmatic density where the increase of reaction rates by confinement and the decrease by diffusion slow-down balance. More important, the predicted optimal density is in the range of the experimentally determined density of E. coli. We conclude that cells have evolved to a cytoplasmatic density resulting in the maximum metabolic rate given the nutrient availability and macromolecular crowding effects and report a flux balance model accounting for its effect.

Alexei Vazquez

2009-10-11T23:59:59.000Z

391

Proposal for the development of 3D Vertically Integrated Pattern Recognition Associative Memory (VIPRAM)  

SciTech Connect

Future particle physics experiments looking for rare processes will have no choice but to address the demanding challenges of fast pattern recognition in triggering as detector hit density becomes significantly higher due to the high luminosity required to produce the rare process. The authors propose to develop a 3D Vertically Integrated Pattern Recognition Associative Memory (VIPRAM) chip for HEP applications, to advance the state-of-the-art for pattern recognition and track reconstruction for fast triggering.

Deptuch, Gregory; Hoff, Jim; Kwan, Simon; Lipton, Ron; Liu, Ted; Ramberg, Erik; Todri, Aida; Yarema, Ray; /Fermilab; Demarteua, Marcel,; Drake, Gary; Weerts, Harry; /Argonne /Chicago U. /Padua U. /INFN, Padua

2010-10-01T23:59:59.000Z

392

A SECOND-ORDER BIAS MODEL FOR THE LOGARITHMIC HALO MASS DENSITY  

Science Conference Proceedings (OSTI)

We present an analytic model for the local bias of dark matter halos in a {Lambda}CDM universe. The model uses the halo mass density instead of the halo number density and is searched for various halo mass cuts, smoothing lengths, and redshift epochs. We find that, when the logarithmic density is used, the second-order polynomial can fit the numerical relation between the halo mass distribution and the underlying matter distribution extremely well. In this model, the logarithm of the dark matter density is expanded in terms of log halo mass density to the second order. The model remains excellent for all halo mass cuts (from M{sub cut} = 3 Multiplication-Sign 10{sup 11} to 3 Multiplication-Sign 10{sup 12} h{sup -1} M{sub Sun }), smoothing scales (from R = 5 h{sup -1} Mpc to 50 h{sup -1} Mpc), and redshift ranges (from z = 0 to 1.0) considered in this study. The stochastic term in the relation is found to be not entirely random, but a part of the term can be determined by the magnitude of the shear tensor.

Jee, Inh [Department of Astronomy, University of Texas, 1 University Station, C1400, Austin, TX 78712-0259 (United States); Park, Changbom [School of Physics, Korea Institute for Advanced Study, Heogiro 85, Seoul 130-722 (Korea, Republic of); Kim, Juhan [Center for Advanced Computation, Korea Institute for Advanced Study, Heogiro 85, Seoul 130-722 (Korea, Republic of); Choi, Yun-Young [Department of Astronomy and Space Science, Kyung Hee University, Gyeonggi 446-701 (Korea, Republic of); Kim, Sungsoo S., E-mail: yy.choi@khu.ac.kr [School of Space Research, Kyung Hee University, Gyeonggi 446-701 (Korea, Republic of)

2012-07-01T23:59:59.000Z

393

IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 48, NO. 2, FEBRUARY 2013 587 Power Noise in TSV-Based 3-D Integrated Circuits  

E-Print Network (OSTI)

to form a 3-D stack. Noise analysis of three power delivery topologies is described. Calibration circuits stacked circuits. The effect of the through silicon via (TSV) density on the noise profile of a 3-D power) is the de- sign of a robust power distribution network that can provide suf- ficient current to every load

Friedman, Eby G.

394

Developing a power-efficient and low-cost 3D NoC using smart GALS-based vertical channels  

Science Conference Proceedings (OSTI)

Shorter global interconnects enable 3D NoC structures to offer higher performance, improved packaging density, and lower interconnect power consumption to CMPs and SoCs compared to their 2D counterparts. However, substantial challenges such as high peak ... Keywords: 3D Networks-on-Chip, Bidirectional Bisynchronous Vertical Channels, Forecasting-based dynamic power management

Amir-Mohammad Rahmani; Pasi Liljeberg; Juha Plosila; Hannu Tenhunen

2013-06-01T23:59:59.000Z

395

Geometric Analysis, Visualization, and Conceptualization of 3D...  

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

(1) Acquire information about the inside of an object, and generate a 3D image data set (2) Define the regions (geometric structures) of interest (3) Create a geometric...

396

Further Analysis of 3D Magnetotelluric Measurements Over the Coso  

Open Energy Info (EERE)

Further Analysis of 3D Magnetotelluric Measurements Over the Coso Further Analysis of 3D Magnetotelluric Measurements Over the Coso Geothermal Field Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Further Analysis of 3D Magnetotelluric Measurements Over the Coso Geothermal Field Details Activities (1) Areas (1) Regions (0) Abstract: At last year's GRC annual meeting we presented initial results of a 3D investigation of the Coso Geothermal field utilizing a dense grid of magnetotelluric (MT) stations plus a single line of contiguous bipole array profiling over the east flank of the field (Newman et al., 2005). Motivation for this study is that electrical resistivity/ conductivity mapping can contribute to better improved understanding of enhanced geothermal systems (EGS) by imaging the geometry, bounds and controlling

397

Software: DIF3D - Nuclear Engineering Division (Argonne)  

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

D D Software: ETOE-2 MC2-2 SDX DIF3D DIF3DK VIM REBUS-3 RCT ORIGEN-RA VARI3D SE2-ANL (SUPERENERGY2) SAS4A/SASSYS-1 SAS-DIF3DK MSET PRODIAG Join us on Facebook Follow us on Twitter NE on Flickr Celebrating the 70th Anniversary of Chicago Pile 1 (CP-1) Argonne OutLoud on Nuclear Energy Argonne Energy Showcase 2012 Software DIF3D (Diffusion and Transport Theory Codes) Bookmark and Share Standard Code Description NAME AND TITLE DIF3D 10.0: Code System Using Variational Nodal Methods and Finite Difference Methods to Solve Neutron Diffusion and Transport Theory Problems. CONTRIBUTOR K. L. Derstine Nuclear Engineering Division Argonne National Laboratory, Argonne, Illinois 60439. CODING LANGUAGE AND COMPUTER Fortran 90 and C source code for Linux PCs, MacOSX and SUN, (C00784MNYCP00).

398

Robust and Efficient 3D Recognition by Alignment  

E-Print Network (OSTI)

Alignment is a prevalent approach for recognizing 3D objects in 2D images. A major problem with current implementations is how to robustly handle errors that propagate from uncertainties in the locations of image ...

Alter, Tao Daniel

1992-09-01T23:59:59.000Z

399

Perceptually-motivated graphics, visualization and 3D displays  

Science Conference Proceedings (OSTI)

This course presents timely, relevant examples on how researchers have leveraged perceptual information for optimization of rendering algorithms, to better guide design and presentation in (3D stereoscopic) display media, and for improved visualization ...

Ann McNamara; Katerina Mania; Marty Banks; Christopher Healey

2010-07-01T23:59:59.000Z

400

Tracking 3-D Rotations with the Quaternion Bingham Filter  

E-Print Network (OSTI)

A deterministic method for sequential estimation of 3-D rotations is presented. The Bingham distribution is used to represent uncertainty directly on the unit quaternion hypersphere. Quaternions avoid the degeneracies of ...

Glover, Jared

2013-03-27T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

Development and Implementation of 3-D, High-speed Tomography...  

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

operations such as fluid-bed combustors, coal gasifiers, carbon capture processes, and Fischer-Tropsch synthesis. A dedicated 3-D ECVT for imaging fluidized-bed systems will...

402

Full-3D Waveform Tomography for Southern California | Argonne...  

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

Submitted by mkaczmar on October 3, 2012 - 09:19 Authors: Lee, E., Chenm P., Jordan, T.H., Maechling, P.J., Denolle, M., Beroza, G.C. Our full-3D tomography (F3DT) uses...

403

3D reconstruction of emission and absorption in planetary nebulae  

Science Conference Proceedings (OSTI)

This paper addresses the problem of reconstructing the 3D structure of planetary nebulae from 2D observations. Assuming axial symmetry, our method jointly reconstructs the distribution of dust and ionized gas in the nebulae from observations at two different ...

Andrei Lin?u; Hendrik P. A. Lensch; Marcus Magnor; Sascha El-Abed; Hans-Peter Seidel

2007-09-01T23:59:59.000Z

404

Building a database of 3D scenes from user annotations  

E-Print Network (OSTI)

In this paper, we wish to build a high quality database of images depicting scenes, along with their real-world three-dimensional (3D) coordinates. Such a database is useful for a variety of applications, including training ...

Russell, Bryan C.

405

3D Radiation Field Estimation Algorithm v1.0  

Science Conference Proceedings (OSTI)

The product is a calculational subprogram to be used within CAD, Laser scan or GIS software products to extrapolate / interpolate gamma radiation dose rates at 3-D locations for which no field survey data had been ...

2013-04-24T23:59:59.000Z

406

3D-Simulation Studies of SNS Ring Doublet Magnets  

E-Print Network (OSTI)

3D-SIMULATION STUDIES OF SNS RING DOUBLET MAGNETS* J.G. Wang # , SNS/ORNL, Oak Ridge, TN 37831-6471, U.S.A. N.the Spallation Neutron Source (SNS) at ORNL employs in its

Wang, J.G.; Tsoupas N.; Venturini, M.

2005-01-01T23:59:59.000Z

407

Investigation of 3-D Heat Transfer Effects in Fenestration Products.  

E-Print Network (OSTI)

??ABSTRACT INVESTIGATION OF 3-D HEAT TRANSFER EFFECTS IN FENESTRATION PRODUCTS SEPTEMBER 2010 SNEH KUMAR B. TECH., INDIAN INSTITUTE OF TECHNOLOGY, CHENNAI INDIA M.S.M.E., UNIVERSITY OF… (more)

Kumar, Sneh

2010-01-01T23:59:59.000Z

408

3D assembly and actuation of nanopatterned membranes using nanomagnets  

E-Print Network (OSTI)

A new method for aligning and actuating membranes for 3D nano-assembly based on the interactions of nanomagnets has been developed. Arrays of nanopatterned magnetic material are integrated onto thin-film membranes. It is ...

Nichol, Anthony John

2011-01-01T23:59:59.000Z

409

The Shapes of a 3D Grain Growth Microstructure  

Science Conference Proceedings (OSTI)

P2-28: Characterization of Pores and Cracks in Underwater Welds by µCT and Digital Optical Microscopy · P3-01: 3D Visualisation of Crystallographic Pitting.

410

P3-01: 3D Visualisation of Crystallographic Pitting  

Science Conference Proceedings (OSTI)

P2-28: Characterization of Pores and Cracks in Underwater Welds by µCT and Digital Optical Microscopy · P3-01: 3D Visualisation of Crystallographic Pitting.

411

The road to 3D EDA tool readiness  

Science Conference Proceedings (OSTI)

Today's SoCs/SIPs face numerous design challenges as increased integration of system components on a single die stretches the limits of technology and design capacity. 3D integration, where multiple dies are stacked and interconnected in the vertical ...

Charles Chiang; Subarna Sinha

2009-01-01T23:59:59.000Z

412

2D/3D registration algorithm for lung brachytherapy  

Science Conference Proceedings (OSTI)

Purpose: A 2D/3D registration algorithm is proposed for registering orthogonal x-ray images with a diagnostic CT volume for high dose rate (HDR) lung brachytherapy. Methods: The algorithm utilizes a rigid registration model based on a pixel/voxel intensity matching approach. To achieve accurate registration, a robust similarity measure combining normalized mutual information, image gradient, and intensity difference was developed. The algorithm was validated using a simple body and anthropomorphic phantoms. Transfer catheters were placed inside the phantoms to simulate the unique image features observed during treatment. The algorithm sensitivity to various degrees of initial misregistration and to the presence of foreign objects, such as ECG leads, was evaluated. Results: The mean registration error was 2.2 and 1.9 mm for the simple body and anthropomorphic phantoms, respectively. The error was comparable to the interoperator catheter digitization error of 1.6 mm. Preliminary analysis of data acquired from four patients indicated a mean registration error of 4.2 mm. Conclusions: Results obtained using the proposed algorithm are clinically acceptable especially considering the complications normally encountered when imaging during lung HDR brachytherapy.

Zvonarev, P. S. [McMaster University, Medical Physics and Applied Radiation Sciences, Hamilton, Ontario L8S 4L8 (Canada); Farrell, T. J.; Hunter, R.; Wierzbicki, M.; Hayward, J. E. [McMaster University, Medical Physics and Applied Radiation Sciences, Hamilton, Ontario L8S 4L8 (Canada); Juravinski Cancer Centre, Medical Physics, Hamilton, Ontario L8V 5C2 (Canada); Sur, R. K. [McMaster University, Medical Physics and Applied Radiation Sciences, Hamilton, Ontario L8S 4L8 (Canada); Juravinski Cancer Centre, Radiation Oncology, Hamilton, Ontario L8V 5C2 (Canada)

2013-02-15T23:59:59.000Z

413

DYNA3D/ParaDyn Regression Test Suite Inventory  

Science Conference Proceedings (OSTI)

The following table constitutes an initial assessment of feature coverage across the regression test suite used for DYNA3D and ParaDyn. It documents the regression test suite at the time of production release 10.1 in September 2010. The columns of the table represent groupings of functionalities, e.g., material models. Each problem in the test suite is represented by a row in the table. All features exercised by the problem are denoted by a check mark in the corresponding column. The definition of ''feature'' has not been subdivided to its smallest unit of user input, e.g., algorithmic parameters specific to a particular type of contact surface. This represents a judgment to provide code developers and users a reasonable impression of feature coverage without expanding the width of the table by several multiples. All regression testing is run in parallel, typically with eight processors. Many are strictly regression tests acting as a check that the codes continue to produce adequately repeatable results as development unfolds, compilers change and platforms are replaced. A subset of the tests represents true verification problems that have been checked against analytical or other benchmark solutions. Users are welcomed to submit documented problems for inclusion in the test suite, especially if they are heavily exercising, and dependent upon, features that are currently underrepresented.

Lin, J I

2011-01-25T23:59:59.000Z

414

Matter density perturbations and effective gravitational constant in modified gravity models of dark energy  

E-Print Network (OSTI)

We derive the equation of matter density perturbations on sub-horizon scales for a general Lagrangian density f(R, phi, X) that is a function of a Ricci scalar R, a scalar field phi and a kinetic term X=-(nabla phi)^2/2. This is useful to constrain modified gravity dark energy models from observations of large-scale structure and weak lensing. We obtain the solutions for the matter perturbation delta_m as well as the gravitational potential Phi for some analytically solvable models. In a f(R) dark energy model with the Lagrangian density f(R)=alpha R^{1+m}-Lambda, the growth rates of perturbations exhibit notable differences from those in the standard Einstein gravity unless m is very close to 0. In scalar-tensor models with the Lagrangian density f=F(phi)R+2p(phi,X) we relate the models with coupled dark energy scenarios in the Einstein frame and reproduce the equations of perturbations known in the current literature by making a conformal transformation. We also estimate the evolution of perturbations in both Jordan and Einstein frames when the energy fraction of dark energy is constant during the matter-dominated epoch.

Shinji Tsujikawa

2007-05-08T23:59:59.000Z

415

Reconstructing the west Mebon Vishnu: a marriage of traditional artefactual analysis with digital 3D visualization  

Science Conference Proceedings (OSTI)

The West Mebon Vishnu is one of the most magnificent works of sculpture in South East Asian art history, and a key example of the tradition of large bronzes that plays an important role in the history of the region. Unfortunately, this once powerful ... Keywords: 3D modelling, Angkor, virtual archaeology, virtual heritage, west mebon vishnu

Marnie Feneley; Tom Chandler; Nils Gleissenberger; Ben Alexander

2007-09-01T23:59:59.000Z

416

A visibility algorithm for converting 3D meshes into editable 2D vector graphics  

Science Conference Proceedings (OSTI)

Artists often need to import and embellish 3D models coming from CAD-CAM into 2D vector graphics software to produce, e.g., brochures or manuals. Current automatic solutions tend to result, at best, in a 2D triangle soup and artists often have to trace ... Keywords: NPR, geometry processing, vector graphics, visibility

Elmar Eisemann; Sylvain Paris; Frédo Durand

2009-07-01T23:59:59.000Z

417

Semantic 3D CAD and its applications in construction industry: an outlook of construction data visualization  

Science Conference Proceedings (OSTI)

In response to the need of using electronic design data directly in construction management applications, many CAD developers have started implementing semantic data models in their CAD products using industry foundation classes (IFCs). While helpful, ... Keywords: 3D CAD, IFC, construction, data visualization, semantic

Zhigang Shen; Raja R. A. Issa; Linxia Gu

2007-06-01T23:59:59.000Z

418

Two-Phase 3D Model of Reduction Cell  

Science Conference Proceedings (OSTI)

Cryoscopic Data for Hall-Héroult Bath Containing Magnesium Fluoride, Calcium Fluoride, Potassium Cryolite, and Sodium Chloride · Current Distribution and ...

419

Data extraction from dense 3D surface models  

E-Print Network (OSTI)

Bowman,A. Bock,M. Bowman,J. Siebert,P. Compstat 2002, proc 15th Int Conf on Computational Statistics, August 24-28, Bremen, Germany, 2002

Bowman, A.; Bock, M.; Bowman, J.

420

Texture mapping 3D models of real-world scenes  

Science Conference Proceedings (OSTI)

Texture mapping has become a popular tool in the computer graphics industry in the last few years because it is an easy way to achieve a high degree of realism in computer-generated imagery with very little effort. Over the last decade, texture-mapping ... Keywords: anti-aliasing, height field, homogeneous coordinates, image perspective transformation, image warping, multiresolution data, perspective projection, polygons, ray tracing, real-time scene generation, rectification, registration, texture mapping, visual simulators, voxels

Frederick M. Weinhaus; Venkat Devarajan

1997-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

3D Characterization and Modeling of Fatigue Cracks  

Science Conference Proceedings (OSTI)

The HEDM and CT are performed with high energy x-rays at the Advanced Photon Source (APS). One set of LSHR specimens has small cracks on the order of ...

422

Modeling chloride transport in cracked concrete: a 3-D image ...  

Science Conference Proceedings (OSTI)

... and Technology, 100 Bureau Drive 8615, Gaithersburg ... package implements the UMFPACK direct solver ... on a rotating anode generator and capillary ...

2013-01-07T23:59:59.000Z

423

Modeling and Characterization of 3D Photovoltaics - Programmaster ...  

Science Conference Proceedings (OSTI)

Third Generation PV encompasses a wide diversity of materials and nanostructures and ... Electrochemical and Mechanical Reliability of Three Dimensionally ...

424

3D Modeling of Dendritic Grain Structures in Turbine Blade ...  

Science Conference Proceedings (OSTI)

modern aircraft engines and land-based power-plants. .... Figure 2 illustrates the grid generation for a close-up detail of a turbine blade geometry. (junction ...

425

Density-Driven General Circulation in a Closed Basin Using a Two-Lavel Model  

Science Conference Proceedings (OSTI)

A rectangular-basin ocean, driven by buoyancy and density fluxes in its northern and southern portions, is studied using a two-level model. Only baroclinic motion is induced under the conditions of 1) no wind, 2) neither interfacial nor bottom ...

Motoyoshi Ikeda

1986-05-01T23:59:59.000Z

426

Brownstone and Fang 1 A VEHICLE OWNERSHIP AND UTILIZATION CHOICE MODEL WITH ENDOGENOUS RESIDENTIAL DENSITY  

E-Print Network (OSTI)

This paper explores the impact of residential density on households ’ vehicle type and usage choices using the 2001 National Household Travel Survey (NHTS). Attempts to quantify the effect of urban form on households ’ vehicle choice and utilization often encounter the problem of sample selectivity. Household characteristics that are unobservable to the researchers might determine simultaneously where to live, what vehicles to choose, and how much to drive them. Unless this simultaneity is modeled, any relationship between residential density and vehicle choice may be biased. This paper extends the Bayesian multivariate ordered probit and tobit model developed in Fang (2008) to treat local residential density as endogenous. The model includes equations for vehicle ownership and usage in terms of number of cars, number of trucks (vans, sports utility vehicles, and pickup trucks), miles traveled by cars, and miles traveled by trucks. We carry out policy simulations which show that an increase in residential density has a negligible effect on car choice and utilization, but slightly reduces truck choice and utilization. We also perform an out-of-sample forecast using a holdout sample to test the robustness of the model. * Corresponding author.

David Brownstone; Hao (audrey Fang

2009-01-01T23:59:59.000Z

427

Modelling the propagation of turbid density inflows into a stratified lake: Daecheong Reservoir, Korea  

Science Conference Proceedings (OSTI)

Many reservoirs and associated downstream ecosystems located in the Asian monsoon climate region are under increased pressure from the long-term negative effects of turbid flood runoff. Despite the ubiquitous use of turbidity (C"T) as a barometer of ... Keywords: Daecheong Reservoir, ELCOM-CAEDYM, Real-time reservoir management, Reservoir density flow, Stratified reservoir, Turbidity modelling

S. W. Chung; M. R. Hipsey; J. Imberger

2009-12-01T23:59:59.000Z

428

A Three-Dimensional Model of Density-Driven Circulation in the Irish Sea  

Science Conference Proceedings (OSTI)

A semi-implicit version of the Princeton Ocean Model, ECOMsi, was used to simulate the cyclonic gyre that is found in the western Irish Sea during the spring and the summer. Mesoscale, seasonal, density-driven circulations such as this are an ...

Kevin J. Horsburgh; A. Edward Hill

2003-02-01T23:59:59.000Z

429

Emerging Technologies in the Built Environment: Geographic Information Science (GIS), 3D Printing, and Additive Manufacturing  

SciTech Connect

Abstract 1: Geographic information systems emerged as a computer application in the late 1960s, led in part by projects at ORNL. The concept of a GIS has shifted through time in response to new applications and new technologies, and is now part of a much larger world of geospatial technology. This presentation discusses the relationship of GIS and estimating hourly and seasonal energy consumption profiles in the building sector at spatial scales down to the individual parcel. The method combines annual building energy simulations for city-specific prototypical buildings and commonly available geospatial data in a GIS framework. Abstract 2: This presentation focuses on 3D printing technologies and how they have rapidly evolved over the past couple of years. At a basic level, 3D printing produces physical models quickly and easily from 3D CAD, BIM (Building Information Models), and other digital data. Many AEC firms have adopted 3D printing as part of commercial building design development and project delivery. This presentation includes an overview of 3D printing, discusses its current use in building design, and talks about its future in relation to the HVAC industry. Abstract 3: This presentation discusses additive manufacturing and how it is revolutionizing the design of commercial and residential facilities. Additive manufacturing utilizes a broad range of direct manufacturing technologies, including electron beam melting, ultrasonic, extrusion, and laser metal deposition for rapid prototyping. While there is some overlap with the 3D printing talk, this presentation focuses on the materials aspect of additive manufacturing and also some of the more advanced technologies involved with rapid prototyping. These technologies include design of carbon fiber composites, lightweight metals processing, transient field processing, and more.

New, Joshua Ryan [ORNL

2014-01-01T23:59:59.000Z

430

A thermodynamic model for aqueous solutions of liquid-like density  

DOE Green Energy (OSTI)

The paper describes a model for the prediction of the thermodynamic properties of multicomponent aqueous solutions and discusses its applications. The model was initially developed for solutions near room temperature, but has been found to be applicable to aqueous systems up to 300/sup 0/C or slightly higher. A liquid-like density and relatively small compressibility are assumed. A typical application is the prediction of the equilibrium between an aqueous phase (brine) and one or more solid phases (minerals). (ACR)

Pitzer, K.S.

1987-06-01T23:59:59.000Z

431

3D Tomographic Imaging Of The Southern Apennines (Italy)- A Statistical  

Open Energy Info (EERE)

Tomographic Imaging Of The Southern Apennines (Italy)- A Statistical Tomographic Imaging Of The Southern Apennines (Italy)- A Statistical Approach To Estimate The Model Uncertainty And Resolution Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: 3D Tomographic Imaging Of The Southern Apennines (Italy)- A Statistical Approach To Estimate The Model Uncertainty And Resolution Details Activities (0) Areas (0) Regions (0) Abstract: A new dataset of first P-wave arrival times is used to derive the 3D tomographic model of the Campania-Lucania region in the southern Apennines (Italy). We address the issue related to the non-uniqueness of the tomographic inversion solution through massive numerical experimentation based on the global exploration of the model parameter space starting from a large variety of physically plausible initial models.

432

Extra Dimensions: 3D and Time in PDF Documentation  

SciTech Connect

Experimental science is replete with multi-dimensional information which is often poorly represented by the two dimensions of presentation slides and print media. Past efforts to disseminate such information to a wider audience have failed for a number of reasons, including a lack of standards which are easy to implement and have broad support. Adobe's Portable Document Format (PDF) has in recent years become the de facto standard for secure, dependable electronic information exchange. It has done so by creating an open format, providing support for multiple platforms and being reliable and extensible. By providing support for the ECMA standard Universal 3D (U3D) file format in its free Adobe Reader software, Adobe has made it easy to distribute and interact with 3D content. By providing support for scripting and animation, temporal data can also be easily distributed to a wide, non-technical audience. We discuss how the field of radiation imaging could benefit from incorporating full 3D information about not only the detectors, but also the results of the experimental analyses, in its electronic publications. In this article, we present examples drawn from high-energy physics, mathematics and molecular biology which take advantage of this functionality. We demonstrate how 3D detector elements can be documented, using either CAD drawings or other sources such as GEANT visualizations as input.

Graf, N.A.; /SLAC

2012-04-11T23:59:59.000Z

433

Galaxy density profiles and shapes -- I. simulation pipeline for lensing by realistic galaxy models  

E-Print Network (OSTI)

Studies of strong gravitational lensing in current and upcoming wide and deep photometric surveys, and of stellar kinematics from (integral-field) spectroscopy at increasing redshifts, promise to provide valuable constraints on galaxy density profiles and shapes. However, both methods are affected by various selection and modelling biases, whch we aim to investigate in a consistent way. In this first paper in a series we develop a flexible but efficient pipeline to simulate lensing by realistic galaxy models. These galaxy models have separate stellar and dark matter components, each with a range of density profiles and shapes representative of early-type, central galaxies without significant contributions from other nearby galaxies. We use Fourier methods to calculate the lensing properties of galaxies with arbitrary surface density distributions, and Monte Carlo methods to compute lensing statistics such as point-source lensing cross-sections. Incorporating a variety of magnification bias modes lets us examine different survey limitations in image resolution and flux. We rigorously test the numerical methods for systematic errors and sensitivity to basic assumptions. We also determine the minimum number of viewing angles that must be sampled in order to recover accurate orientation-averaged lensing quantities. We find that for a range of non-isothermal stellar and dark matter density profiles typical of elliptical galaxies, the combined density profile and corresponding lensing properties are surprisingly close to isothermal around the Einstein radius. The converse implication is that constraints from strong lensing and/or stellar kinematics, which are indeed consistent with isothermal models near the Einstein radius, cannot trivially be extrapolated to smaller and larger radii.

Glenn van de Ven; Rachel Mandelbaum; Charles R. Keeton

2008-08-19T23:59:59.000Z

434

Virtual Frog Dissection: Interactive 3D Graphics Via the Web  

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

Dissection: Interactive 3D Graphics Via the Web Dissection: Interactive 3D Graphics Via the Web David Robertson, William Johnston, and Wing Nip Imaging and Distributed Computing Group Lawrence Berkeley National Laboratory Published in Proceedings, The Second International WWW Conference '94: Mosaic and the Web, Chicago, IL (1994). Hyperlinks have been updated periodically to replace stale links. ABSTRACT We have developed a set of techniques for providing interactive 3D graphics via the World Wide Web (WWW) as part of the ``Whole Frog'' project [ 1 ]. We had three goals: (1) to provide K-12 biology students with the ability to explore the anatomy of a frog with a virtual dissection tool; (2) to show the feasibility of interactive visualization over the Web; and (3) to show the possibility for the Web and its associated browsers to be an

435

3D Visualization of Water Transport in Ferns  

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

3D Visualization of Water Transport 3D Visualization of Water Transport in Ferns 3D Visualization of Water Transport in Ferns Print Monday, 08 April 2013 00:00 Plants transport water through elongated cells called xylem. However, in trees such as eucalyptus or redwood, the xylem tissue-better known as wood-bears the weight of the branches and leaves, giving rise to the often massive canopies characteristic of these species. We know much about water transport in woody plants, but considerably less about primitive plants such as ferns. Not only have ferns played an important role in the evolution of trees and shrubs but collectively, these plant forms are a fascinating study in contrasts because ferns use xylem strictly for water transport, leaving structural support to other tissues. Given the global distribution and impressive diversity of ferns, how has their xylem evolved to deal with variable habitat water availability?

436

A 3-D Link between Antibiotic Resistance and Brain Disease  

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

A 3-D Link between Antibiotic Resistance and Brain Disease A 3-D Link between Antibiotic Resistance and Brain Disease The story of what makes certain types of bacteria resistant to a specific antibiotic has a sub-plot that gives insight into the cause of a rare form of brain degeneration among children, according to investigators at St. Jude Children's Research Hospital. The story takes a twist as key differences among the structures of its main molecular characters disappear and reappear as they are assembled in the cell. The story is based on a study of the three-dimensional (3-D) structure of an enzyme called pantothenate kinase, which triggers the first step in the production coenzyme A (CoA), a molecule that is indispensable to all forms of life. Enzymes are proteins that speed up biochemical reactions. CoA plays a pivotal role in the cells' ability to extract energy from fatty

437

Building Energy Software Tools Directory: Look3D  

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

Look3D Look3D Look3D logo. A Windows program that creates three-dimensional, full-color surface plots from columnar data. These surface plots can be rotated and customized. Keywords three-dimensional, full-color surface plots from columnar data, energy-use data Validation/Testing N/A Expertise Required No special expertise required. Users International. Audience Anyone analyzing time series data. Input ASCII space delimited numeric files. Input should have time stamp for maximum usability. Output Visualization on screen. Computer Platform Windows 3.1 or higher. Programming Language Visual C++ (source not available). Strengths Particularly useful for visualizing load profile changes over time. Weaknesses N/A Contact Company: Energy Systems Laboratory Address: Building Energy Analysis Division

438

A heightened radiosensitivity of stromal fibroblasts in 3D matrix  

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

heightened radiosensitivity of stromal fibroblasts in 3D matrix heightened radiosensitivity of stromal fibroblasts in 3D matrix X. Liu, K. McHenry & Z. Yuan. Department of Genetics and Complex Diseases, Harvard School of Public Health, Boston, MA 02115 Our recent study suggested that stromal fibroblasts can sensitize cocultured epithelial cells to radiation exposure. Since stromal fibroblasts exhibit highly elongated cytoplasmic extensions (pseudopodia), which as shown in our previous study are essential to guide neighboring epithelial cells to form branching ducts, we asked whether radiation could interfere with the formation of fibroblasts' pseudopodium, which would then impair their ability to structurally and functionally support the associated epithelial cells. For this, HMFs were seeded in 3D and were either mock-treated or irradiated 24 h

439

Modelling of the internal dynamics and density in a tens of joules plasma focus device  

Science Conference Proceedings (OSTI)

Using MHD theory, coupled differential equations were generated using a lumped parameter model to describe the internal behaviour of the pinch compression phase in plasma focus discharges. In order to provide these equations with appropriate initial conditions, the modelling of previous phases was included by describing the plasma sheath as planar shockwaves. The equations were solved numerically, and the results were contrasted against experimental measurements performed on the device PF-50J. The model is able to predict satisfactorily the timing and the radial electron density profile at the maximum compression.

Marquez, Ariel [CNEA and Instituto Balseiro, 8402 Bariloche (Argentina); Gonzalez, Jose [INVAP-CONICET and Instituto Balseiro, 8402 Bariloche, Argentina. (Argentina); Tarifeno-Saldivia, Ariel; Pavez, Cristian; Soto, Leopoldo [CCHEN, Comision Chilena de Energia Nuclear, Casilla 188-D, Santiago (Chile); Center for Research and Applications in Plasma Physics and Pulsed Power, P4 (Chile); Clausse, Alejandro [CNEA-CONICET and Universidad Nacional del Centro, 7000 Tandil (Argentina)

2012-01-15T23:59:59.000Z

440

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

Note: This page contains sample records for the topic "3-d density 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

A Mean Field Analysis of the Exchange Coupling (J) For 2- and 3-D Structured Tetracyanoethylenide (TCNE -)-based Magnets  

SciTech Connect

Mean field expressions based on the simple Heisenberg model were derived to correlate the inter- and intralayer exchange coupling to the critical temperatures, Tc, for several TCNE (tetracyanoethylene) based magnets with extended 2- and 3-D structure types. These expressions were used to estimate the exchange coupling, J, for 2-D ferrimagnetic [MII(TCNE)(NCMe)2]+ (M = Mn, Fe), 3-D antiferromagnetic MnII(TCNE)[C4(CN)8]1/2, and 3-D ferrimagnetic MnII(TCNE)3/2(I3)1/2. The sign and magnitude of the exchange coupling are in accord with previously reported magnetic data.

McConnell, Amber C. [University of Utah; Fishman, Randy Scott [ORNL; Miller, Joel S. [University of Utah

2012-01-01T23:59:59.000Z

442

Building a 3D Simulator for Autonomous Navigation of Robotic Fishes  

E-Print Network (OSTI)

Abstract-- This paper presents a 3D simulator used for studying the motion control and autonomous navigation of a robotic fish. The simplified kinematics and hydrodynamics models are created for the simulator, including many other object models such as water, obstacles, sonar sensors and a swimming pool. The experimental results show that the use of this simulator is a realistic and convenient way to develop autonomous navigation algorithms for robotic fishes. I.

Jindong Liu

2004-01-01T23:59:59.000Z

443

Numerical Classical and Quantum Mechanical simulations of Charge Density wave models  

E-Print Network (OSTI)

We first present how to do a computer simulation of Charge Density Waves using a driven harmonic oscillator model by a numerical scheme as initially formulated by Littlewood, and then afterwards use this to present how the dielectric model as presented by this proceedure leads to a blow up at the initialization of a threshold field ET. We find that this is highly unphysical and this initiated our inquiry as to alternative models. Afterwards, we then investigate hwo to present this transport problem of CDW quantum mechanically, threough a numerical simulation of the massive Schwinger model. We find that this single chaing quantum mechanical simulation uwed to formulate solutions to CDW transport in itself is insufficient for transport of solitons(anti-solitons) through a pinning gap model of CDW. We show that a model Hamiltonian with Peierls condensation energy used to couple adjacent chains (or transverse wave vectors) permits formation of solitons (anti- solitons) which can be used to transport CDW through a potential barrier. This addition of the Peierls condensation energy term is essential for any quantum model of Charge Density Waves to give tunneling behavior as seen via a numerical simulation.

A. W. Beckwith

2004-09-13T23:59:59.000Z

444

Two-dimensional modeling of high plasma density inductively coupled sources for materials processing  

SciTech Connect

Inductively coupled plasma sources are being developed to address the need for high plasma density (10[sup 11]--10[sup 12] cm[sup [minus]3]), low pressure (a few to 10--20 mTorr) etching of semiconductor materials. One such device uses a flat spiral coil of rectangular cross section to generate radio-frequency (rf) electric fields in a cylindrical plasma chamber, and capacitive rf biasing on the substrate to independently control ion energies incident on the wafer. To investigate these devices we have developed a two-dimensional hybrid model consisting of electromagnetic, electron Monte Carlo, and hydrodynamic modules; and an off line plasma chemistry Monte Carlo simulation. The results from the model for plasma densities, plasma potentials, and ion fluxes for Ar, O[sub 2], Ar/CF[sub 4]/O[sub 2] gas mixtures will be presented.

Ventzek, P.L.G.; Hoekstra, R.J.; Kushner, M.J. (Department of Electrical and Computer Engineering, University of Illinois, Urbana, Illinois 61801 (United States))

1994-01-01T23:59:59.000Z

445

A geoscience perspective on immersive 3D gridded data visualization  

Science Conference Proceedings (OSTI)

We describe visualization software, Visualizer, that was developed specifically for interactive, visual exploration in immersive virtual reality (VR) environments. Visualizer uses carefully optimized algorithms and data structures to support the high ... Keywords: 3D data visualization, Immersive visualization, Interactive exploration, Virtual reality

Magali I. Billen; Oliver Kreylos; Bernd Hamann; Margarete A. Jadamec; Louise H. Kellogg; Oliver Staadt; Dawn Y. Sumner

2008-09-01T23:59:59.000Z

446

Unencumbered 3D interaction with see-through displays  

Science Conference Proceedings (OSTI)

Augmented Reality (AR) systems that employ user-worn display and sensor technology can be problematic for certain applications as the technology might, for instance, be encumbering to the user or limit the deployment options of the system. Spatial AR ... Keywords: 3D, augmented reality, gesture, interaction, interface, mixed reality, pose, public display, see-through, spatial display, touch

Alex Olwal

2008-10-01T23:59:59.000Z

447

Extra Dimensions: 3D and Time in PDF Documentation  

Science Conference Proceedings (OSTI)

High energy physics is replete with multi-dimensional information which is often poorly represented by the two dimensions of presentation slides and print media. Past efforts to disseminate such information to a wider audience have failed for a number of reasons, including a lack of standards which are easy to implement and have broad support. Adobe's Portable Document Format (PDF) has in recent years become the de facto standard for secure, dependable electronic information exchange. It has done so by creating an open format, providing support for multiple platforms and being reliable and extensible. By providing support for the ECMA standard Universal 3D (U3D) file format in its free Adobe Reader software, Adobe has made it easy to distribute and interact with 3D content. By providing support for scripting and animation, temporal data can also be easily distributed to a wide audience. In this talk, we present examples of HEP applications which take advantage of this functionality. We demonstrate how 3D detector elements can be documented, using either CAD drawings or other sources such as GEANT visualizations as input. Using this technique, higher dimensional data, such as LEGO plots or time-dependent information can be included in PDF files. In principle, a complete event display, with full interactivity, can be incorporated into a PDF file. This would allow the end user not only to customize the view and representation of the data, but to access the underlying data itself.

Graf, Norman A.; /SLAC

2011-11-10T23:59:59.000Z

448

Using X3D for medical training simulations  

Science Conference Proceedings (OSTI)

Nowadays medical training simulators play an important role in education and further training of surgeons. With Virtual Reality based training systems it is possible to simulate a surgery under realistic conditions. Input data for the visualization of ... Keywords: GPU raycasting, X3D, haptics, medical training simulators, volume rendering

Yvonne Jung; Ruth Recker; Manuel Olbrich; Ulrich Bockholt

2008-08-01T23:59:59.000Z

449

Interactive painterly stylization of images, videos and 3D animations  

Science Conference Proceedings (OSTI)

We introduce a real-time system that converts images, video, or 3D animation sequences to artistic renderings in various painterly styles. The algorithm, which is entirely executed on the GPU, can efficiently process 512 resolution frames containing ... Keywords: GPU processing, non-photorealistic rendering, painterly rendering, particle systems, video processing

Jingwan Lu; Pedro V. Sander; Adam Finkelstein

2010-02-01T23:59:59.000Z

450

Auto-tuning 3-D FFT library for CUDA GPUs  

Science Conference Proceedings (OSTI)

Existing implementations of FFTs on GPUs are optimized for specific transform sizes like powers of two, and exhibit unstable and peaky performance i.e., do not perform as well in other sizes that appear in practice. Our new auto-tuning 3-D FFT on CUDA ...

Akira Nukada; Satoshi Matsuoka

2009-11-01T23:59:59.000Z

451

Designing stories: practices of narrative in 3D computer games  

Science Conference Proceedings (OSTI)

Drawing on theories from game-, film-, and theatre studies, this paper explores two primary ways in which 3D computer games deal with stories. As evident in how these games are creatively designed and publically discussed, one of these approaches focuses ... Keywords: film, game design, immersion, media comparison, narratology, presentation, representation, storytelling, theatre

Teun Dubbelman

2011-08-01T23:59:59.000Z

452

3Book: A Scalable 3D Virtual Book  

E-Print Network (OSTI)

This paper describes the 3Book, a 3D interactive visualization of a codex book as a component for digital library and information-intensive applications. The 3Book is able to represent books of almost unlimited length, allows users to read large format books, and has features to enhance reading and sensemaking.

Stuart K. Card; Lichan Hong; Jock D. Mackinlay; Ed H. Chi; H. Chi

2004-01-01T23:59:59.000Z

453

3Book: A 3D Electronic Smart Book  

E-Print Network (OSTI)

This paper describes the 3Book, a 3D interactive visualization of a codex book as a component for various digital library and sensemaking systems. The book is designed to hold large books and to support sensemaking operations by readers. The book includes methods in which the automatic semantic analysis of the book's content is used to dynamically tailor access.

Stuart K. Card; Lichan Hong; Jock D. Mackinlay; Ed H. Chi; H. Chi

2004-01-01T23:59:59.000Z

454

Camera and projector arrays for immersive 3D video  

Science Conference Proceedings (OSTI)

Applying recent advances in multi-imager capture and multi-projector display, we combine capabilities through the Nizza multimedia dataflow architecture to deliver low-cost wide-VGA-quality low-latency autostereoscopic 3D display of live video on a single ... Keywords: autostereo immersive display, multi-viewpoint capture, multi-viewpoint display

Harlyn Baker; Zeyu Li

2009-05-01T23:59:59.000Z

455

The wise cursor: assisted selection in 3D serious games  

Science Conference Proceedings (OSTI)

In recent years, the evolution of 3D graphics hardware and software has lead to a growing interest for serious games in three-dimensional virtual environments for learning, training, and rehabilitation. Many of these games are based on a first-person-shooter ... Keywords: Accessible user interfaces, Interactive selection, Navigation in virtual environments, Serious games

Sergio Moya; Sergi Grau; Dani Tost

2013-06-01T23:59:59.000Z

456

Development of Multi-modal 3D Characterization Systems to ...  

Science Conference Proceedings (OSTI)

P1-04: 3D Microstructural Characterization of Uranium Oxide as a Surrogate Nuclear ... P1-15: Gating System Optimisation Design Study of a Cast Automobile ... P2-27: Characterization of Carbonate Rocks through X-ray Microtomography.

457

3D Characterization of Microstructural Evolution in Anisotropic ...  

Science Conference Proceedings (OSTI)

P1-04: 3D Microstructural Characterization of Uranium Oxide as a Surrogate Nuclear ... P1-15: Gating System Optimisation Design Study of a Cast Automobile ... P2-27: Characterization of Carbonate Rocks through X-ray Microtomography.

458

Stereoscopic architecture of 3-D ready DLP-based HDTVs  

Science Conference Proceedings (OSTI)

DLP® Technology has existed for over twenty years with a wide range of products currently in production. The legacy of DLP technology includes innovations such as single-chip color displays and SmoothPicture™ technology. Recent technological ... Keywords: 3-D, DLP, HDTV, stereoscopic

Keith Elliott; David Hutchison

2008-08-01T23:59:59.000Z

459

Underwater 3D Mapping: Experiences and Lessons learned  

Science Conference Proceedings (OSTI)

This paper provides details on the development of a tool to aid in 3D coral reef mapping designed to be operated by a single diver and later integrated into an autonomous robot. We discuss issues that influence the deployment and development of underwater ...

Andrew Hogue; Andrew German; James Zacher; Michael Jenkin

2006-06-01T23:59:59.000Z

460

Generalized holomorphic Szegö kernel in 3D spheroids  

Science Conference Proceedings (OSTI)

Monogenic orthogonal polynomials over 3D prolate spheroids were previously introduced and shown to have some remarkable properties. In particular, the underlying functions take values in the quaternions (identified with R^4), and are generally assumed ... Keywords: Chebyshev polynomials, Ferrer's associated Legendre functions, Hyperbolic functions, Prolate spheroidal monogenics, Quaternion analysis, Szegö kernel function

J. Morais; K. I. Kou; W. SpröíIg

2013-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "3-d density 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

FEM based 3D tumor growth prediction for kidney tumor  

Science Conference Proceedings (OSTI)

It is important to predict the tumor growth so that appropriate treatment can be planned especially in the early stage. In this paper, we propose a finite element method (FEM) based 3D tumor growth prediction system using longitudinal kidney tumor images. ... Keywords: finite element method, kidney tumor, segmentation, tumor growth prediction

Xinjian Chen; Ronald Summers; Jianhua Yao

2010-09-01T23:59:59.000Z

462

3D Imaging of Evaporating Fuel Droplets by Stereoscopic PIV  

Science Conference Proceedings (OSTI)

A gun-type burner is a widely used oil burner for industrial and domestic applications. The oil is pressure-atomized and mixed with air generating a recirculating, swirling flow. Because of the surrounding flame, fuel droplets evaporate, being difficult ... Keywords: 3D PIV, Stereoscopic PIV, droplet dynamics, spray combustion

V. Palero; Y. Ikeda

2002-08-01T23:59:59.000Z

463

The Entropy Solutions for the Lighthill-Whitham-Richards Traffic Flow Model with a Discontinuous Flow-Density Relationship  

Science Conference Proceedings (OSTI)

In this paper we explicitly construct the entropy solutions for the Lighthill-Whitham-Richards (LWR) traffic flow model with a flow-density relationship which is piecewise quadratic, concave, but not continuous at the junction points where two quadratic ... Keywords: LWR model, WENO scheme, discontinuous flow-density relationship, entropy solution, traffic flow

Yadong Lu; S. C. Wong; Mengping Zhang; Chi-Wang Shu

2009-11-01T23:59:59.000Z

464

Coupling methodology of 1D finite difference and 3D finite volume CFD codes based on the Method of Characteristics  

Science Conference Proceedings (OSTI)

This paper describes the methodology followed to perform a co-simulation between 1D (OpenWAM) and 3D (FLUENT) CFD codes. The Method of Characteristics (MoC) has been chosen to transfer the information between the two domains by properly updating the ... Keywords: 1D modeling, 1D-3D coupling, CFD simulation, Co-simulation, Method of Characteristics, User defined function

J. Galindo; A. Tiseira; P. Fajardo; R. Navarro

2011-10-01T23:59:59.000Z

465

Printing out Particle Detectors with 3D-Printers, a Potentially Transformational Advance for HEP Instrumentation  

E-Print Network (OSTI)

This white paper suggests posing a "grand challenge" to the HEP instrumentation community, i.e. the aggressive development of additive manufacturing, also known as 3D-printing, for the production of particle detectors in collaboration with industry. This notion is an outcome of discussions within the instrumentation frontier group during the 2013 APS-DPF Snowmass summer study conducted by the U.S. HEP community. Improvements of current industrial 3D-printing capabilities by one to two orders of magnitude in terms of printing resolution, speed, and object size together with developing the ability to print composite materials could enable the production of any desired 3D detector structure directly from a digital model. Current industrial 3D-printing capabilities are briefly reviewed and contrasted with capabilities desired for printing detectors for particle physics, with micro-pattern gaseous detectors used as a first example. A significant impact on industrial technology could be expected if HEP were to part...

Hohlmann, M

2013-01-01T23:59:59.000Z

466

Printing out Particle Detectors with 3D-Printers, a Potentially Transformational Advance for HEP Instrumentation  

E-Print Network (OSTI)

This white paper suggests posing a "grand challenge" to the HEP instrumentation community, i.e. the aggressive development of additive manufacturing, also known as 3D-printing, for the production of particle detectors in collaboration with industry. This notion is an outcome of discussions within the instrumentation frontier group during the 2013 APS-DPF Snowmass summer study conducted by the U.S. HEP community. Improvements of current industrial 3D-printing capabilities by one to two orders of magnitude in terms of printing resolution, speed, and object size together with developing the ability to print composite materials could enable the production of any desired 3D detector structure directly from a digital model. Current industrial 3D-printing capabilities are briefly reviewed and contrasted with capabilities desired for printing detectors for particle physics, with micro-pattern gaseous detectors used as a first example. A significant impact on industrial technology could be expected if HEP were to partner with industry in taking on such a challenge.

M. Hohlmann

2013-09-03T23:59:59.000Z

467

3D Extended Logging for Geothermal Resources: Field Trials with the Geo-Bilt System  

DOE Green Energy (OSTI)

Geo-BILT (Geothermal Borehole Induction Logging Tool) is an extended induction logging tool designed for 3D resistivity imaging around a single borehole. The tool was developed for deployment in high temperature geothermal wells under a joint program funded by the California Energy Commission, Electromagnetic Instruments (EMI) and the U.S. Department of Energy. EM1 was responsible for tool design and manufacture, and numerical modeling efforts were being addressed at Lawrence Livermore Laboratory (LLNL) and other contractors. The field deployment was done by EM1 and LLNL. The tool operates at frequencies from 2 to 42 kHz, and its design features a series of three-component magnetic sensors offset at 2 and 5 meters from a three-component magnetic source. The combined package makes it possible to do 3D resistivity imaging, deep into the formation, from a single well. The manufacture and testing of the tool was completed in spring of 2001, and the initial deployment of Geo-BILT occurred in May 2001 at the Lost Hills oil field in southern California at leases operated by Chevron USA. This site was chosen for the initial field test because of the favorable geological conditions and the availability of a number of wells suitable for tool deployment. The second deployment occurred in April 2002 at the Dixie Valley geothermal field, operated by Caithness Power LLC, in central Nevada. This constituted the first test in a high temperature environment. The Chevron site features a fiberglass-cased observation well in the vicinity of a water injector. The injected water, which is used for pressure maintenance and for secondary sweep of the heavy oil formation, has a much lower resistivity than the oil bearing formation. This, in addition to the non-uniform flow of this water, creates a 3D resistivity structure, which is analogous to conditions produced from flowing fractures adjacent to geothermal boreholes. Therefore, it is an excellent site for testing the 3D capability of the tool in a low risk environment. The Dixie Valley site offered an environment where the tool could locate near-well fractures associated with steam development. The Lost Hills field measurements yielded a data set suitable for 3D imaging. The Geo-BLT data corresponded to existing conventional logging data and showed clear indications, in several depth intervals, of near-well 3D structure. Subsequent 3D inversion of these data produced a model consistent with non-planar water flow in specific layers. The Dixie Valley measurements identified structures associated with dike intrusions and water inflow at particular depths. Preliminary analysis suggests these structures are steeply dipping, which is consistent with the geology.

Mallan, R; Wilt, M; Kirkendall, B; Kasameyer, P

2002-05-29T23:59:59.000Z

468

A new uniform parameterization and invariant 3D spherical harmonic shape descriptors for shape analysis of the heart's left ventricle - A pilot study  

Science Conference Proceedings (OSTI)

A new approach for uniform parameterization and rotation invariant global description of 3D triangular surface meshes of objects with a spherical topology is presented. It consists of two steps. First, an initial mapping based on a heat conduction model ... Keywords: Left ventricle, Myocardial scintigraphy, Rotation invariant 3D shape descriptors, Spherical harmonic model, Uniform parameterization

A. Ben Abdallah; F. Ghorbel; K. Chatti; H. Essabbah; M. H. Bedoui

2010-10-01T23:59:59.000Z

469

Bridge to Fuel Cell Molecular Catalysis: 3D Non-Platinum Group Metal  

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

Bridge to Fuel Cell Molecular Catalysis: 3D Non-Platinum Group Metal Bridge to Fuel Cell Molecular Catalysis: 3D Non-Platinum Group Metal Catalyst in MEAs Title Bridge to Fuel Cell Molecular Catalysis: 3D Non-Platinum Group Metal Catalyst in MEAs Publication Type Journal Article Year of Publication 2012 Authors Zhu, Xiaobing, John B. Kerr, Qinggang He, Gi Suk Hwang, Zulima Martin, Kyle Clark, Adam Z. Weber, and Nana Zhao Journal ECS Transactions Volume 45 Issue 2 Pagination 143 - 152 Date Published 04/2012 ISSN 1938-6737 Abstract Transition metal porphyrin complexes have been mounted in a three dimensional homogenous distribution inside the ionomer of catalyst layers in MEAs to achieve competitive fuel cell catalysis activity. The effect of electrode components including ionomer, carbon, catalyst, and mediator, and ionomer film thickness, is investigated in fuel cell molecular catalysis system. Membrane electrode assembly (MEA) durability testing has been conducted. SEM and TEM techniques are employed to investigate molecular catalysis electrode micro- and nano- structure and morphology. To date, surprisingly, the best fuel cell performance, i.e. 1280 mA/cm2 of maximum/short-circuit current density is achieved, approaching that of Pt-based electrode, indicating higher turnover frequencies than Pt although with poorer voltages.

470

Non-Born-Oppenheimer electronic and nuclear densities for a Hooke-Calogero three-particle model: Non-uniqueness of density-derived molecular structure  

Science Conference Proceedings (OSTI)

We consider the calculation of non-Born-Oppenheimer, nBO, one-particle densities for both electrons and nuclei. We show that the nBO one-particle densities evaluated in terms of translationally invariant coordinates are independent of the wavefunction describing the motion of center of mass of the whole system. We show that they depend, however, on an arbitrary reference point from which the positions of the vectors labeling the particles are determined. We examine the effect that this arbitrary choice has on the topology of the one-particle density by selecting the Hooke-Calogero model of a three-body system for which expressions for the one-particle densities can be readily obtained in analytic form. We extend this analysis to the one-particle densities obtained from full Coulomb interaction wavefunctions for three-body systems. We conclude, in view of the fact that there is a close link between the choice of the reference point and the topology of one-particle densities that the molecular structure inferred from the topology of these densities is not unique. We analyze the behavior of one-particle densities for the Hooke-Calogero Born-Oppenheimer, BO, wavefunction and show that topological transitions are also present in this case for a particular mass value of the light particles even though in the BO regime the nuclear masses are infinite. In this vein, we argue that the change in topology caused by variation of the mass ratio between light and heavy particles does not constitute a true indication in the nBO regime of the emergence of molecular structure.

Ludena, E. V. [Centro de Quimica, Instituto Venezolano de Investigaciones Cientificas, IVIC, Apartado 21827, Caracas 1020-A (Venezuela, Bolivarian Republic of); Echevarria, L. [Departamento de Quimica, Universidad Simon Bolivar, USB, Sartenejas, Caracas (Venezuela, Bolivarian Republic of); Lopez, X.; Ugalde, J. M. [Kimika Fakultatea, Euskal Herriko Unibertsitatea, Posta Kutxa 1072, 20080 Donostia, Euskadi (Spain)

2012-02-28T23:59:59.000Z

471

P1-03: 3D Microstructural Architectures for Metal and Alloy ...  

Science Conference Proceedings (OSTI)

P2-03: 3D Characterization of High Burn-up MOX Fuel · P2-04: 3D Identification of Inclusions in NiTi Alloy after Electropolishing · P2-05: Advances in 3D Imaging  ...

472

A New Filtering Strategy for Noise Reduction on High Noise 3D Data ...  

Science Conference Proceedings (OSTI)

P2-03: 3D Characterization of High Burn-up MOX Fuel · P2-04: 3D Identification of Inclusions in NiTi Alloy after Electropolishing · P2-05: Advances in 3D Imaging  ...

473

The Influence of Microstructure on 3D Crack Morphologies in a New ...  

Science Conference Proceedings (OSTI)

P2-03: 3D Characterization of High Burn-up MOX Fuel · P2-04: 3D Identification of Inclusions in NiTi Alloy after Electropolishing · P2-05: Advances in 3D Imaging  ...

474

Full waveform inversion of a 3-D source inside an artificial rock  

E-Print Network (OSTI)

of a 3-D Source Inside an Artificial Rock Albert C. To andof a 3-D source inside an artificial rock plate inof a 3-D source inside an artificial rock plate is

To, A C; Glaser, Steven D

2005-01-01T23:59:59.000Z

475

Thermodynamics and Structural Properties of the High Density Gaussian Core Model  

E-Print Network (OSTI)

We numerically study thermodynamic and structural properties of the one-component Gaussian core model (GCM) at very high densities. The solid-fluid phase boundary is carefully determined. We find that the density dependence of both the freezing and melting temperatures obey the asymptotic relation, $\\log T_f$, $\\log T_m \\propto -\\rho^{2/3}$, where $\\rho$ is the number density, which is consistent with Stillinger's conjecture. Thermodynamic quantities such as the energy and pressure and the structural functions such as the static structure factor are also investigated in the fluid phase for a wide range of temperature above the phase boundary. We compare the numerical results with the prediction of the liquid theory with the random phase approximation (RPA). At high temperatures, the results are in almost perfect agreement with RPA for a wide range of density, as it has been already shown in the previous studies. In the low temperature regime close to the phase boundary line, although RPA fails to describe the structure factors and the radial distribution functions at the length scales of the interparticle distance, it successfully predicts their behaviors at shorter length scales. RPA also predicts thermodynamic quantities such as the energy, pressure, and the temperature at which the thermal expansion coefficient becomes negative, almost perfectly. Striking ability of RPA to predict thermodynamic quantities even at high densities and low temperatures is understood in terms of the decoupling of the length scales which dictate thermodynamic quantities from the interparticle distance which dominates the peak structures of the static structure factor due to the softness of the Gaussian core potential.

Atsushi Ikeda; Kunimasa Miyazaki

2011-04-18T23:59:59.000Z

476

A constraint-satisfaction approach for 3D vision/touch-based object recognition  

Science Conference Proceedings (OSTI)

We present a technique for recognizing polyhedral objects by integrating visual and tactile data. The problem is formulated as a constraint-satisfaction problem (CSP) to provide a unified framework for integrating different types of sensory data. To ... Keywords: 3D vision/touch-based object recognition, computational complexity, constraint handling, constraint-satisfaction approach, correspondence uncertainty, data integration, erroneous model object elimination, image recognition, local-consistency enforcing, object recognition, polyhedral objects, scene perceptual structures, tactile data, visual data

1995-08-01T23:59:59.000Z

477

3D Mt Resistivity Imaging For Geothermal Resource Assessment And  

Open Energy Info (EERE)

Resistivity Imaging For Geothermal Resource Assessment And Resistivity Imaging For Geothermal Resource Assessment And Environmental Mitigation At The Glass Mountain Kgra, California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: 3D Mt Resistivity Imaging For Geothermal Resource Assessment And Environmental Mitigation At The Glass Mountain Kgra, California Details Activities (3) Areas (2) Regions (0) Abstract: MT and TDEM surveys acquired in 2005 were integrated with existing MT and TDEM data recovered from obsolete formats to characterize the geometry of the geothermal reservoir. An interpretation based on the correlation of the 3D MT resistivity with well properties indicated that most of the previous exploration wells had been tarted close to but not in the center of areas tha appeared most likely to be permeable. Such

478

3D MAGNETOTELLURIC CHARACTERIZATION OF THE COSO GEOTHERMAL FIELD | Open  

Open Energy Info (EERE)

CHARACTERIZATION OF THE COSO GEOTHERMAL FIELD CHARACTERIZATION OF THE COSO GEOTHERMAL FIELD Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: 3D Magnetotelluric characterization of the COSO Geothermal Field Details Activities (0) Areas (0) Regions (0) Abstract: Knowledge of the subsurface electrical resistivity/conductivity can contribute to a better understanding of complex hydrothermal systems, typified by Coso geothermal field, through mapping the geometry (bounds and controlling structures) over existing production. Three-dimensional magnetotelluric (MT) inversion is now an emerging technology for characterizing the resistivity structures of complex geothermal systems. The method appears to hold great promise, but histories exploiting truly 3D inversion that demonstrate the advantages that can be gained by acquiring

479

Electric field in 3D gravity with torsion  

E-Print Network (OSTI)

It is shown that in static and spherically symmetric configurations of the system of Maxwell field coupled to 3D gravity with