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1

Computation of Domain-Averaged Irradiance with a Simple Two-Stream Radiative Transfer Model Including Vertical Cloud Property Correlations  

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

Computation of Domain-Averaged Irradiance Computation of Domain-Averaged Irradiance with a Simple Two-Stream Radiative Transfer Model Including Vertical Cloud Property Correlations S. Kato Center for Atmospheric Sciences Hampton University Hampton, Virginia Introduction Recent development of remote sensing instruments by Atmospheric Radiation Measurement (ARM?) Program provides information of spatial and temporal variability of cloud structures. However it is not clear what cloud properties are required to express complicated cloud fields in a realistic way and how to use them in a relatively simple one-dimensional (1D) radiative transfer model to compute the domain averaged irradiance. To address this issue, a simple shortwave radiative transfer model that can treat the vertical cloud optical property correlation is developed. The model is based on the gamma-weighted

2

Energy Consumption of Personal Computing Including Portable  

E-Print Network (OSTI)

Energy Consumption of Personal Computing Including Portable Communication Devices Pavel Somavat1 consumption, questions are being asked about the energy contribution of computing equipment. Al- though studies have documented the share of energy consumption by this type of equipment over the years, research

Namboodiri, Vinod

3

Including Ocean Model Uncertainties in Climate Predictions  

E-Print Network (OSTI)

Including Ocean Model Uncertainties in Climate Predictions Chris Brierley, Alan Thorpe, Mat Collins's to perform the integrations Currently uses a `slab' ocean #12;An Ocean Model Required to accurately model transient behaviour Will have its own uncertainties Requires even more computing power Create new models

Jones, Peter JS

4

Complex shell model representation including antibound states  

Science Journals Connector (OSTI)

A generalization of the complex shell model formalism is presented that includes antibound states in the basis. These states, together with bound states, Gamow states, and the continuum background, represented by properly chosen scattering waves, form a representation in which all states are treated on the same footing. Two-particle states are evaluated within this formalism, and observable two-particle resonances are defined. The formalism is illustrated in the well-known case of Li11 in its bound ground state and in Ca70(g.s.), which is also bound. Both cases are found to have a halo structure. These halo structures are described within the generalized complex shell model. We investigated the formation of two-particle resonances in these nuclei, but no evidence of such resonances was found.

R. Id Betan; R. J. Liotta; N. Sandulescu; T. Vertse; R. Wyss

2005-11-30T23:59:59.000Z

5

SEEPAGE MODEL FOR PA INCLUDING DRIFT COLLAPSE  

SciTech Connect

The purpose of this report is to document the predictions and analyses performed using the seepage model for performance assessment (SMPA) for both the Topopah Spring middle nonlithophysal (Tptpmn) and lower lithophysal (Tptpll) lithostratigraphic units at Yucca Mountain, Nevada. Look-up tables of seepage flow rates into a drift (and their uncertainty) are generated by performing numerical simulations with the seepage model for many combinations of the three most important seepage-relevant parameters: the fracture permeability, the capillary-strength parameter 1/a, and the percolation flux. The percolation flux values chosen take into account flow focusing effects, which are evaluated based on a flow-focusing model. Moreover, multiple realizations of the underlying stochastic permeability field are conducted. Selected sensitivity studies are performed, including the effects of an alternative drift geometry representing a partially collapsed drift from an independent drift-degradation analysis (BSC 2004 [DIRS 166107]). The intended purpose of the seepage model is to provide results of drift-scale seepage rates under a series of parameters and scenarios in support of the Total System Performance Assessment for License Application (TSPA-LA). The SMPA is intended for the evaluation of drift-scale seepage rates under the full range of parameter values for three parameters found to be key (fracture permeability, the van Genuchten 1/a parameter, and percolation flux) and drift degradation shape scenarios in support of the TSPA-LA during the period of compliance for postclosure performance [Technical Work Plan for: Performance Assessment Unsaturated Zone (BSC 2002 [DIRS 160819], Section I-4-2-1)]. The flow-focusing model in the Topopah Spring welded (TSw) unit is intended to provide an estimate of flow focusing factors (FFFs) that (1) bridge the gap between the mountain-scale and drift-scale models, and (2) account for variability in local percolation flux due to stochastic hydrologic properties and flow processes.

C. Tsang

2004-09-22T23:59:59.000Z

6

Seepage Model for PA Including Dift Collapse  

SciTech Connect

The purpose of this Analysis/Model Report (AMR) is to document the predictions and analysis performed using the Seepage Model for Performance Assessment (PA) and the Disturbed Drift Seepage Submodel for both the Topopah Spring middle nonlithophysal and lower lithophysal lithostratigraphic units at Yucca Mountain. These results will be used by PA to develop the probability distribution of water seepage into waste-emplacement drifts at Yucca Mountain, Nevada, as part of the evaluation of the long term performance of the potential repository. This AMR is in accordance with the ''Technical Work Plan for Unsaturated Zone (UZ) Flow and Transport Process Model Report'' (CRWMS M&O 2000 [153447]). This purpose is accomplished by performing numerical simulations with stochastic representations of hydrological properties, using the Seepage Model for PA, and evaluating the effects of an alternative drift geometry representing a partially collapsed drift using the Disturbed Drift Seepage Submodel. Seepage of water into waste-emplacement drifts is considered one of the principal factors having the greatest impact of long-term safety of the repository system (CRWMS M&O 2000 [153225], Table 4-1). This AMR supports the analysis and simulation that are used by PA to develop the probability distribution of water seepage into drift, and is therefore a model of primary (Level 1) importance (AP-3.15Q, ''Managing Technical Product Inputs''). The intended purpose of the Seepage Model for PA is to support: (1) PA; (2) Abstraction of Drift-Scale Seepage; and (3) Unsaturated Zone (UZ) Flow and Transport Process Model Report (PMR). Seepage into drifts is evaluated by applying numerical models with stochastic representations of hydrological properties and performing flow simulations with multiple realizations of the permeability field around the drift. The Seepage Model for PA uses the distribution of permeabilities derived from air injection testing in niches and in the cross drift to stochastically simulate the 3D flow of water in the fractured host rock (in the vicinity of potential emplacement drifts) under ambient conditions. The Disturbed Drift Seepage Submodel evaluates the impact of the partial collapse of a drift on seepage. Drainage in rock below the emplacement drift is also evaluated.

G. Li; C. Tsang

2000-12-20T23:59:59.000Z

7

Quality Assurance of Computational Model  

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

of Computational of Computational Models Presented at the Annual Department of Presented at the Annual Department of Energy Quality Council Meeting Subir K. Sen Sub . Se Office of Quality Assurance, HS-33 December 7, 2011 Outline Outline * Introduction Introduction * GAO Report 11-143 i l h C il * National Research Council Focus * DOE Model Validation/Performance * Summary 2 Introduction Introduction * Computer models are used in EM's massive Computer models are used in EM s massive clean up effort to model physical and biogeochemical processes biogeochemical processes. * Results from these computational models are often used to make costly cleanup decisions often used to make costly cleanup decisions including selection, performance assessment and annual

8

COMPUTER PROCESSING AND MODELING -  

E-Print Network (OSTI)

COMPUTER PROCESSING AND MODELING - Full Paper Magnetic Resonance in Medicine 67:572­579 (2012, Washington University School of Medicine, St. Louis, Missouri, USA Grant sponsor: Mr. and Mrs. Spencer T. Olin Fellowship for Women in Graduate Study; Grant sponsor: NSF; Grant number: CCF-0963742; Grant

Nehorai, Arye

9

Computing as model-based empirical science  

Science Journals Connector (OSTI)

Is computer science a science? This question has been asked since the inception of the field in the 1940s. Computer Science is certainly a science in the sense of a mature body of knowledge, including systematic method and practice. Many in the field ... Keywords: abstraction, creative automata, modeling, virtual analog

Paul FIshwick

2014-05-01T23:59:59.000Z

10

Comparison of Joint Modeling Approaches Including Eulerian Sliding Interfaces  

SciTech Connect

Accurate representation of discontinuities such as joints and faults is a key ingredient for high fidelity modeling of shock propagation in geologic media. The following study was done to improve treatment of discontinuities (joints) in the Eulerian hydrocode GEODYN (Lomov and Liu 2005). Lagrangian methods with conforming meshes and explicit inclusion of joints in the geologic model are well suited for such an analysis. Unfortunately, current meshing tools are unable to automatically generate adequate hexahedral meshes for large numbers of irregular polyhedra. Another concern is that joint stiffness in such explicit computations requires significantly reduced time steps, with negative implications for both the efficiency and quality of the numerical solution. An alternative approach is to use non-conforming meshes and embed joint information into regular computational elements. However, once slip displacement on the joints become comparable to the zone size, Lagrangian (even non-conforming) meshes could suffer from tangling and decreased time step problems. The use of non-conforming meshes in an Eulerian solver may alleviate these difficulties and provide a viable numerical approach for modeling the effects of faults on the dynamic response of geologic materials. We studied shock propagation in jointed/faulted media using a Lagrangian and two Eulerian approaches. To investigate the accuracy of this joint treatment the GEODYN calculations have been compared with results from the Lagrangian code GEODYN-L which uses an explicit treatment of joints via common plane contact. We explore two approaches to joint treatment in the code, one for joints with finite thickness and the other for tight joints. In all cases the sliding interfaces are tracked explicitly without homogenization or blending the joint and block response into an average response. In general, rock joints will introduce an increase in normal compliance in addition to a reduction in shear strength. In the present work we consider the limiting case of stiff discontinuities that only affect the shear strength of the material.

Lomov, I; Antoun, T; Vorobiev, O

2009-12-16T23:59:59.000Z

11

Accounting for the Energy Consumption of Personal Computing Including Portable Devices  

E-Print Network (OSTI)

Accounting for the Energy Consumption of Personal Computing Including Portable Devices Pavel.S.A vinod.namboodiri@wichita.edu ABSTRACT In light of the increased awareness of global energy consumption the share of energy consumption due to these equipment over the years, these have rarely characterized

Namboodiri, Vinod

12

Modelling energy efficiency for computation  

E-Print Network (OSTI)

In the last decade, efficient use of energy has become a topic of global significance, touching almost every area of modern life, including computing. From mobile to desktop to server, energy efficiency concerns are now ubiquitous. However...

Reams, Charles

2012-11-13T23:59:59.000Z

13

Parallel computing in atmospheric chemistry models  

SciTech Connect

Studies of atmospheric chemistry are of high scientific interest, involve computations that are complex and intense, and require enormous amounts of I/O. Current supercomputer computational capabilities are limiting the studies of stratospheric and tropospheric chemistry and will certainly not be able to handle the upcoming coupled chemistry/climate models. To enable such calculations, the authors have developed a computing framework that allows computations on a wide range of computational platforms, including massively parallel machines. Because of the fast paced changes in this field, the modeling framework and scientific modules have been developed to be highly portable and efficient. Here, the authors present the important features of the framework and focus on the atmospheric chemistry module, named IMPACT, and its capabilities. Applications of IMPACT to aircraft studies will be presented.

Rotman, D. [Lawrence Livermore National Lab., CA (United States). Atmospheric Sciences Div.

1996-02-01T23:59:59.000Z

14

Aerodynamic Forces on Truck Models, Including Two Trucks in Tandem  

E-Print Network (OSTI)

rear-edge shaping on the aerodynamic drag of bluff vehiclesOF CALIFORNIA, BERKELEY Aerodynamic Forces on Truck Models,TRANSIT AND HIGHWAYS Aerodynamic Forces on Truck Models,

Hammache, Mustapha; Michaelian, Mark; Browand, Fred

2001-01-01T23:59:59.000Z

15

Elastic–Plastic Spherical Contact Modeling Including Roughness Effects  

E-Print Network (OSTI)

A multilevel model for elastic–plastic contact between ajunction growth of an elastic–plastic spherical contact. J.nite element based elastic–plastic model for the contact of

Li, L.; Etsion, I.; Talke, F. E.

2010-01-01T23:59:59.000Z

16

Including Non-Boussinesq Effects in Boussinesq Ocean Circulation Models  

Science Journals Connector (OSTI)

A set of equations is derived to modify z-level Boussinesq ocean circulation models to account for non-Boussinesq effects. These equations take the same form as those of the Boussinesq models except for the addition of a few correction terms that ...

Youyu Lu

2001-06-01T23:59:59.000Z

17

System Advisor Model Includes Analysis of Hybrid CSP Option ...  

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

Several novel concepts related to power generation have been missing in the System Advisor Model (SAM). One such concept, until now, is a hybrid integrated solar combined-cycle...

18

DYNAMIC MODELLING OF AUTONOMOUS POWER SYSTEMS INCLUDING RENEWABLE POWER SOURCES.  

E-Print Network (OSTI)

(thermal, gas, diesel) and renewable (hydro, wind) power units. The objective is to assess the impact - that have a special dynamic behaviour, and the wind turbines. Detailed models for each one of the power system components are developed. Emphasis is given in the representation of different hydro power plant

Paris-Sud XI, Université de

19

Reliability modeling of transmission and distribution systems including dependent failures  

E-Print Network (OSTI)

is considered. Therefore, the trans i t ion rate mat r i x of the entire system need not be generated. Th i s method is compared wi th the sequential method for normal and stormy weather condit ions, and is then extended to include m weather conditions... . 9 E . Cut -Set Equations 10 III M A R K O V C U T - S E T M E T H O D 13 A . Basic Approach 13 B . Markov Cut -Set Me thod 13 C . Examp le 18 D . Compar ison wi th the Sequential Me thod 22 E . Cut-Sets w i th m Weather States 24 F . Extens...

Beydoun, Rami Sami

2012-06-07T23:59:59.000Z

20

Computable General Equilibrium Models for Sustainability Impact...  

Open Energy Info (EERE)

Computable General Equilibrium Models for Sustainability Impact Assessment: Status quo and prospects Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Computable General...

Note: This page contains sample records for the topic "including computer modeling" 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

A mathematical model for computational aesthetics  

Science Journals Connector (OSTI)

Computational aesthetics is the research of computational methods that do make applicable aesthetic decisions in a similar fashion as human can. In the context of computer science, it has a direct impact on landscape planning and management, computer ... Keywords: AHP, aesthetics design, analytical hierarchy process, art, artwork evaluation, computational aesthetics, mathematical modelling, painting evaluation

W. A. P. Wickramasinghe; A. T. Dharmarathne; N. D. Kodikara

2010-01-01T23:59:59.000Z

22

Quantum computation beyond the circuit model  

E-Print Network (OSTI)

The quantum circuit model is the most widely used model of quantum computation. It provides both a framework for formulating quantum algorithms and an architecture for the physical construction of quantum computers. However, ...

Jordan, Stephen Paul

2008-01-01T23:59:59.000Z

23

Property:Data Comparison to Computational Models | Open Energy Information  

Open Energy Info (EERE)

Comparison to Computational Models Comparison to Computational Models Jump to: navigation, search Property Name Data Comparison to Computational Models Property Type Text Pages using the property "Data Comparison to Computational Models" Showing 14 pages using this property. A Alden Large Flume + Designed as needed Alden Small Flume + Designed as needed Alden Tow Tank + Velocity, flow characteristics Alden Wave Basin + Wave height, period, length, velocity D Davidson Laboratory Tow Tank + Comparisons to validate and improve CFD models are made periodically. M MHL Free Surface Channel + Custom MHL Data Acquisition System includes graphical displays for the results of each sampling channel. MHL Tow Tank + Custom MHL Data Acquisition System includes graphical displays for the results of each sampling channel.

24

Sandia National Laboratories: Computational Modeling & Simulation  

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

Simulated Wind Data for Wave Resource Characterization at US Test Sites On September 17, 2014, in Computational Modeling & Simulation, Energy, News, News & Events, Renewable...

25

Modeling and computing based on lattices.  

E-Print Network (OSTI)

??This dissertation presents three studies addressing various modeling and computational aspects of lattice structures. The first study is concerned with characterization of the threshold behavior… (more)

Zhao, Haifeng, 1980-

2011-01-01T23:59:59.000Z

26

Small-signal dynamic model of a micro-grid including conventional and electronically  

E-Print Network (OSTI)

Small-signal dynamic model of a micro-grid including conventional and electronically interfaced-signal modelling of a micro-grid system that includes conventional (rotating machine) and electronically interfaced deviations in the overall system model and provides a methodology for the analysis of autonomous micro-grid

Lehn, Peter W.

27

Climate Modeling using High-Performance Computing  

SciTech Connect

The Center for Applied Scientific Computing (CASC) and the LLNL Climate and Carbon Science Group of Energy and Environment (E and E) are working together to improve predictions of future climate by applying the best available computational methods and computer resources to this problem. Over the last decade, researchers at the Lawrence Livermore National Laboratory (LLNL) have developed a number of climate models that provide state-of-the-art simulations on a wide variety of massively parallel computers. We are now developing and applying a second generation of high-performance climate models. Through the addition of relevant physical processes, we are developing an earth systems modeling capability as well.

Mirin, A A

2007-02-05T23:59:59.000Z

28

Trust models in ubiquitous computing  

Science Journals Connector (OSTI)

...Nonmonotonic trust management for P2P applications...Security and Trust Management (STM). Electronic...Theoretical Computer Science, vol. 157, pp...A probabilistic approach to predict peers...Notes in Computer Science, no. 3191, pp...Aberer2006P2P reputation management: probabilistic...

2008-01-01T23:59:59.000Z

29

RICE UNIVERSITY Computational Modeling of Icon Search  

E-Print Network (OSTI)

1 RICE UNIVERSITY Computational Modeling of Icon Search by Michael D. Fleetwood A THESIS SUBMITTED HOUSTON, TEXAS DECEMBER, 2001 #12;3 DECEMBER, 2001 ABSTRACT Computational Modeling of Icon Search by Michael Fleetwood As the use of graphical user interfaces expands into new areas, icons are becoming

Byrne, Mike

30

NUMERICAL MODELING OF DEFORMATION AND FRACTURE OF WOOD INCLUDING HETEROGENEITY AND ANISOTROPY  

E-Print Network (OSTI)

NUMERICAL MODELING OF DEFORMATION AND FRACTURE OF WOOD INCLUDING HETEROGENEITY AND ANISOTROPY John A. Nairn Wood Science & Engineering, Oregon State University, USA Abstract The challenge in numerical modeling of wood is to have the model closely match the structure of a real specimen. The model

Nairn, John A.

31

Computational Models -Lecture 6 Turing Machines  

E-Print Network (OSTI)

Computational Models - Lecture 6 Turing Machines Slides modified by Benny Chor, based on original Models - Lecture 6 Turing Machines Turing Machines Slides modified by Benny Chor, based on original Models - Lecture 6 Turing Machines Turing Machines Turing Machines Slides modified by Benny Chor, based

Beimel, Amos

32

CARD No. 23 Models and Computer Codes  

E-Print Network (OSTI)

models; and that DOE organize a peer review of conceptual models. Section 194.23(b) requires by EPA to evaluate DOE's compliance with the requirements of Section 194.23, the approach taken by DOECARD No. 23 Models and Computer Codes 23.A BACKGROUND Section 194.23 addresses the compliance

33

Computational network models of neocortical seizures  

E-Print Network (OSTI)

firing and bursting in cortical networks. Here, we use a computational model of a neocortical circuitfiring characteristics of neurons and by feedback between the two neurons was found in small biological circuits

Frohlich, Flavio

2007-01-01T23:59:59.000Z

34

Sandia National Laboratories: Computational Modeling & Simulation  

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

Sandia and Partners Complete Phase I of a Vertical-Axis Deep-Water Offshore Turbine Study On December 3, 2014, in Computational Modeling & Simulation, Energy, News, News & Events,...

35

Modeling-Computer Simulations | Open Energy Information  

Open Energy Info (EERE)

Modeling-Computer Simulations Modeling-Computer Simulations Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Modeling-Computer Simulations Details Activities (78) Areas (31) Regions (5) NEPA(0) Exploration Technique Information Exploration Group: Data and Modeling Techniques Exploration Sub Group: Modeling Techniques Parent Exploration Technique: Modeling Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Stress fields and magnitudes Hydrological: Visualization and prediction of the flow patterns and characteristics of geothermal fluids Thermal: Thermal conduction and convection patterns in the subsurface Cost Information Low-End Estimate (USD): 85.008,500 centUSD 0.085 kUSD 8.5e-5 MUSD 8.5e-8 TUSD / hour Median Estimate (USD): 195.0019,500 centUSD

36

Computer aided nuclear reactor modeling  

E-Print Network (OSTI)

Nuclear reactor modeling is an important activity that lets us analyze existing as well as proposed systems for safety, correct operation, etc. The quality of a analysis is directly proportional to the quality of the model used. In this work we look...

Warraich, Khalid Sarwar

2012-06-07T23:59:59.000Z

37

Modeling of Geothermal Reservoirs: Fundamental Processes, Computer  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » Modeling of Geothermal Reservoirs: Fundamental Processes, Computer Simulation and Field Applications Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Modeling of Geothermal Reservoirs: Fundamental Processes, Computer Simulation and Field Applications Abstract This article attempts to critically evaluate the present state of the art of geothermal reservoir simulation. Methodological aspects of geothermal reservoir modeling are briefly reviewed, with special emphasis on flow in fractured media. We then examine some applications of numerical simulation to studies of reservoir dynamics, well test design and analysis, and modeling of specific fields. Tangible impacts of reservoir simulation

38

The IceCube Computing Infrastructure Model  

Science Journals Connector (OSTI)

In addition to the big LHC experiments, a number of mid-size experiments are coming online which need to define new computing models to meet the demands on processing and storage requirements of those experiments. We present the hybrid computing model of IceCube which leverages Grid models with a more flexible direct user model as an example of a possible solution. In IceCube a central data center at UW-Madison serves as a Tier-0 with a single Tier-1 at DESY Zeuthen.

M Merck; S Barnet

2012-01-01T23:59:59.000Z

39

MAC-Kaust Project P1 CO2 Sequestration Modeling of CO2 sequestration including parameter  

E-Print Network (OSTI)

MAC-Kaust Project P1 ­ CO2 Sequestration Modeling of CO2 sequestration including parameter identification and numerical simulation M. Brokate, O. A. PykhteevHysteresis aspects of CO2 sequestration modeling K-H. Hoffmann, N. D. Botkin Objectives and methods of CO2 sequestration There is a popular belief

Turova, Varvara

40

A non-isothermal PEM fuel cell model including two water transport mechanisms in the  

E-Print Network (OSTI)

A non-isothermal PEM fuel cell model including two water transport mechanisms in the membrane K Freiburg Germany A dynamic two-phase flow model for proton exchange mem- brane (PEM) fuel cells and the species concentrations. In order to describe the charge transport in the fuel cell the Poisson equations

Münster, Westfälische Wilhelms-Universität

Note: This page contains sample records for the topic "including computer modeling" 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

Computer modeling reveals how surprisingly potent hepatitis C...  

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

Hepatitis C computer modeling Computer modeling reveals how surprisingly potent hepatitis C drug works A study reveals how daclatasvir targets one of its proteins and causes the...

42

Compartmental models of mammalian motoneurons of types S, FR and FF and their computer simulation  

Science Journals Connector (OSTI)

Mathematical models of motoneurons (MNs) of types S, FR and FF were developed based on cat MN data. Each of the three models has an initial segment, a soma and a dendritic tree. The initial segment and the soma include models of several types of ionic ... Keywords: Compartmental models, Computational model, Dendritic processing, Mathematical model, Model validation, Motoneuron, Motoneuron model

M. F. Vieira; A. F. Kohn

2007-06-01T23:59:59.000Z

43

Modeling and Computational Strategies for Optimal Development Planning of Offshore  

E-Print Network (OSTI)

1 Modeling and Computational Strategies for Optimal Development Planning of Offshore Oilfields for offshore oil and gas fields as a basis to include the generic fiscal rules with ringfencing provisions-integer programming. 1 Introduction Offshore oil and gas field development planning has received significant attention

Grossmann, Ignacio E.

44

Recovery Boiler Modeling: An Improved Char Burning Model Including Sulfate Reduction and Carbon Removal  

E-Print Network (OSTI)

gasification, reactions between oxygen and combustibles in the boundary layer, and integration of sulfate reduction and sulfide reoxidation into the char burning process. Simulations using the model show that for typical recovery boiler conditions, char burning...

Grace, T. M.; Wag, K. J.; Horton, R. R.; Frederick, W. J.

45

Improved computer models support genetics research  

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

February » February » Simple computer models unravel genetic stress reactions in cells Simple computer models unravel genetic stress reactions in cells Integrated biological and computational methods provide insight into why genes are activated. February 8, 2013 When complete, these barriers will be a portion of the NMSSUP upgrade. This molecular structure depicts a yeast transfer ribonucleic acid (tRNA), which carries a single amino acid to the ribosome during protein construction. A combined experimental and computational approach, to better understand signaling pathways that lead to genetic mutations, is at the core of this research. Contact thumbnail of Brian Munsky, PhD Distinguished Postdoctoral Fellow Brian Munsky, PhD Information Services, Advanced Measurement Science

46

Computer Models in Astronomy and Statistics Stellar Evolution  

E-Print Network (OSTI)

Computer Models in Astronomy and Statistics Stellar Evolution Calibration of X-ray Detectors Embedding Astronomical Computer Models into Complex Statistical Models David A. van Dyk Statistics Section Dyk Complex Analyses with Computer Models in Astronomy #12;Computer Models in Astronomy and Statistics

van Dyk, David

47

Computer modeling of the global warming effect  

SciTech Connect

The state of knowledge of global warming will be presented and two aspects examined: observational evidence and a review of the state of computer modeling of climate change due to anthropogenic increases in greenhouse gases. Observational evidence, indeed, shows global warming, but it is difficult to prove that the changes are unequivocally due to the greenhouse-gas effect. Although observational measurements of global warming are subject to ``correction,`` researchers are showing consistent patterns in their interpretation of the data. Since the 1960s, climate scientists have been making their computer models of the climate system more realistic. Models started as atmospheric models and, through the addition of oceans, surface hydrology, and sea-ice components, they then became climate-system models. Because of computer limitations and the limited understanding of the degree of interaction of the various components, present models require substantial simplification. Nevertheless, in their present state of development climate models can reproduce most of the observed large-scale features of the real system, such as wind, temperature, precipitation, ocean current, and sea-ice distribution. The use of supercomputers to advance the spatial resolution and realism of earth-system models will also be discussed.

Washington, W.M. [National Center for Atmospheric Research, Boulder, CO (United States)

1993-12-31T23:59:59.000Z

48

Turtle With Mad Input (trace Unlimited Rays Through Lumped Elements) -- A Computer Program For Simulating Charged Particle Beam Transport Systems And Decay Turtle Including Decay Calculations  

E-Print Network (OSTI)

Turtle With Mad Input (trace Unlimited Rays Through Lumped Elements) -- A Computer Program For Simulating Charged Particle Beam Transport Systems And Decay Turtle Including Decay Calculations

Carey, D C

1999-01-01T23:59:59.000Z

49

Motivating Participation in Social Computing Applications: A User Modeling Perspective  

E-Print Network (OSTI)

environments. Keywords: social computing, participation, motivation, persuasion, gamification, open user models

Vassileva, Julita

50

TOWARDS COMPUTER-AIDED MODEL GENERATION Keynote presentation at the  

E-Print Network (OSTI)

modeling process. Model Generation is a new modeling paradigm for rapid computer- aided model generation Phenomena-oriented modeling is a research initiative for the computer-aided support and partial automation of simulation environments, methodologies for the computer-aided support of the modeling activity itself have

Linninger, Andreas A.

51

High performance computing and numerical modelling  

E-Print Network (OSTI)

Numerical methods play an ever more important role in astrophysics. This is especially true in theoretical works, but of course, even in purely observational projects, data analysis without massive use of computational methods has become unthinkable. The key utility of computer simulations comes from their ability to solve complex systems of equations that are either intractable with analytic techniques or only amenable to highly approximative treatments. Simulations are best viewed as a powerful complement to analytic reasoning, and as the method of choice to model systems that feature enormous physical complexity such as star formation in evolving galaxies, the topic of this 43rd Saas Fee Advanced Course. The organizers asked me to lecture about high performance computing and numerical modelling in this winter school, and to specifically cover the basics of numerically treating gravity and hydrodynamics in the context of galaxy evolution. This is still a vast field, and I necessarily had to select a subset ...

,

2014-01-01T23:59:59.000Z

52

MODELLING AND COMPUTING THE QUALITY OF INFORMATION  

E-Print Network (OSTI)

MODELLING AND COMPUTING THE QUALITY OF INFORMATION IN E-SCIENCE A thesis submitted to the University of Manchester for the degree of Doctor of Philosophy in the Faculty of Engineering and Physical 12 Acknowledgements 13 1 Information Quality in e-science 14 1.1 Quality knowledge

Sattler, Ulrike

53

Significant Enhancement of Computational Efficiency in Nonlinear Multiscale Battery Model for Computer Aided Engineering (Presentation)  

SciTech Connect

This presentation discusses the significant enhancement of computational efficiency in nonlinear multiscale battery model for computer aided engineering in current research at NREL.

Kim, G.; Pesaran, A.; Smith, K.; Graf, P.; Jun, M.; Yang, C.; Li, G.; Li, S.; Hochman, A.; Tselepidakis, D.; White, J.

2014-06-01T23:59:59.000Z

54

Modeling-Computer Simulations At Valles Caldera - Sulphur Springs Area  

Open Energy Info (EERE)

Roberts, Et Al., 1995) Roberts, Et Al., 1995) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Valles Caldera - Sulphur Springs Area (Roberts, Et Al., 1995) Exploration Activity Details Location Valles Caldera - Sulphur Springs Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Modeling of the amplitude data, using the Aki-Lamer method, confirmed that this anomaly exists and we estimated quantitative parameters defining it. All model parameters were physically meaningful except for one. The value for Q inside the anomaly, required to explain the data, was unrealistically low. This was probably due to the inability to include additional structural complexity within the low-Q zone that would account for a

55

The Food Crises: A quantitative model of food prices including speculators and ethanol conversion  

E-Print Network (OSTI)

Recent increases in basic food prices are severely impacting vulnerable populations worldwide. Proposed causes such as shortages of grain due to adverse weather, increasing meat consumption in China and India, conversion of corn to ethanol in the US, and investor speculation on commodity markets lead to widely differing implications for policy. A lack of clarity about which factors are responsible reinforces policy inaction. Here, for the first time, we construct a dynamic model that quantitatively agrees with food prices. The results show that the dominant causes of price increases are investor speculation and ethanol conversion. Models that just treat supply and demand are not consistent with the actual price dynamics. The two sharp peaks in 2007/2008 and 2010/2011 are specifically due to investor speculation, while an underlying upward trend is due to increasing demand from ethanol conversion. The model includes investor trend following as well as shifting between commodities, equities and bonds to take ad...

Lagi, Marco; Bertrand, Karla Z; Bar-Yam, Yaneer

2011-01-01T23:59:59.000Z

56

Reduced model for the description of radiation-matter interaction including atomic recoil  

Science Journals Connector (OSTI)

We show that a model for the collective atomic recoil laser, previously introduced to include collisions with an external buffer gas, can be reduced to a single dynamical equation for the probe amplitude. This is the result of a clever adiabatic elimination of the atomic variables and of the assumption of a negligible effect of the probe field onto the atomic motion. This reduced model provides a fairly accurate description of the phase diagram of the original set of equations and allows for the investigation of more realistic regimes, where the direct simulation of the full model would be otherwise unfeasible. As a result, we find that the onset of a coherent field can be either described by a second- or first-order transition, the former scenario being observable only below a given temperature. Moreover, the first-order transition is accompanied by an intrinsic optical bistability region.

J. Javaloyes; G. L. Lippi; A. Politi

2003-09-12T23:59:59.000Z

57

Applications of computer modeling at Wrightson, Johnson, Haddon & Williams, Inc  

Science Journals Connector (OSTI)

Computer modeling has become useful as an investigative tool and as a client communication and explanation tool in the field of acoustical consulting. A variety of in?house developed and commercially available applications is in constant use at the firm of Wrightson Johnson Haddon & Williams. Examples likely to be demonstrated (depending on time) include use of digital filtering for building exterior noise reduction comparisons a shell isolation rating (SIR) model simple sound barrier programs an HVAC spreadsheet a visual sightline modeling tool specular sound reflections in a semicircular arc and some uses of CATT?acoustic auralizations.

2002-01-01T23:59:59.000Z

58

Wild Fire Computer Model Helps Firefighters  

ScienceCinema (OSTI)

A high-tech computer model called HIGRAD/FIRETEC, the cornerstone of a collaborative effort between U.S. Forest Service Rocky Mountain Research Station and Los Alamos National Laboratory, provides insights that are essential for front-line fire fighters. The science team is looking into levels of bark beetle-induced conditions that lead to drastic changes in fire behavior and how variable or erratic the behavior is likely to be.

Canfield, Jesse

2014-06-02T23:59:59.000Z

59

Cancer evolution: mathematical models and computational inference  

E-Print Network (OSTI)

and Engineering, ETH Zurich, Mattenstrasse 26, 4058 Basel, Switzerland; E-mail: niko.beerenwinkel@bsse.ethz.ch. Abstract.— Cancer is a somatic evolutionary process characterized by the accumulation of mutations, which contribute to tumor growth, clinical... Version dated: October 7, 2014 Cancer evolution Cancer evolution: mathematical models and computational inference Niko Beerenwinkel1,2, Roland F Schwarz3, Moritz Gerstung4, Florian Markowetz5 1Department of Biosystems Science and Engineering, ETH...

Beerenwinkel, Niko; Schwarz, Roland F.; Gerstung, Moritz; Markowetz, Florian

2014-10-07T23:59:59.000Z

60

Computer modeling of the spallation process  

E-Print Network (OSTI)

nuclide the final product was in atomic number, the less accurate the results were. Fermi made a significant contribution to the problem of fragmen- 5 tation in 1950 when he proposed statistical weights for the various combinations of reactions from a... reactions. Other approaches were being developed at the same time E. Fermi was working on his model. Bernardini, et al. , and later Metropolis, 6 7 et al. , brought forth Monte Carlo computer programs that followed an incident particle mathematically...

Walker, Wayne Claire

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "including computer modeling" 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.


61

Computer Models in Astronomy and Statistics Stellar Evolution  

E-Print Network (OSTI)

Computer Models in Astronomy and Statistics Stellar Evolution Calibration of X-ray Detectors Embedding Astronomical Computer Models into Complex Statistical Models David A. van Dyk Statistics Section, Imperial College London UCLA, February 2012 David A. van Dyk Complex Analyses with Computer Models

van Dyk, David

62

Recent Advances in Computational Materials Science and Multiscale Materials Modeling  

E-Print Network (OSTI)

Recent Advances in Computational Materials Science and Multiscale Materials Modeling Guest Editors Advances in Computational Materials Science and Multiscale Materials Modeling. These symposia provide. Professor Karel Matous Aerospace and Mechanical Engineering Department University of Notre Dame Email

Matous, Karel

63

Scientists model brain structure to help computers recognize...  

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

Do you see what I see? Scientists model brain structure to help computers recognize objects The team tried developing a computer model based on human neural structure and function,...

64

Computational Science Technical Note CSTN-205 Optimising Computations for Evaluating Ising and Potts Model Partition  

E-Print Network (OSTI)

0 Computational Science Technical Note CSTN-205 Optimising Computations for Evaluating Ising and Potts Model Partition Functions by Exact Enumeration K. A. Hawick and D. P. Playne 2013 The Ising computationally feasible for the Q=3,4 state Potts model as well as the 2 state Ising spin model. We report on bit

Hawick, Ken

65

Industrial Application of ObjectOriented Mathematical Modeling and Computer Algebra  

E-Print Network (OSTI)

Industrial Application of Object­Oriented Mathematical Modeling and Computer Algebra in Mechanical of such an en­ vironment including a modeling language (ObjectMath -- Object oriented Mathematical language within a computer algebra language. This environment and language, called ObjectMath (Object oriented

Zhao, Yuxiao

66

Computable General Equilibrium Models for Sustainability Impact Assessment:  

Open Energy Info (EERE)

Computable General Equilibrium Models for Sustainability Impact Assessment: Computable General Equilibrium Models for Sustainability Impact Assessment: Status quo and prospects Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Computable General Equilibrium Models for Sustainability Impact Assessment: Status quo and prospects Agency/Company /Organization: DG Joint Research Centre, European Commission, University of Heidelberg Topics: Co-benefits assessment Resource Type: Guide/manual, Publications, Software/modeling tools User Interface: Other Website: iatools.jrc.ec.europa.eu/docs/ecol_econ_2006.pdf Computable General Equilibrium Models for Sustainability Impact Assessment: Status quo and prospects Screenshot References: Computable general equilibrium models[1] Abstract "Sustainability Impact Assessment (SIA) of economic, environmental, and

67

Including radiative heat transfer and reaction quenching in modeling a Claus plant waste heat boiler  

SciTech Connect

Due to increasingly stringent sulfur emission regulations, improvements are necessary in the modified Claus process. A recently proposed model by Nasato et al. for the Claus plant waste heat boiler (WHB) is improved by including radiative heat transfer, which yields significant changes in the predicted heat flux and the temperature profile along the WHB tube, leading to a faster quenching of chemical reactions. For the WHB considered, radiation accounts for approximately 20% of the heat transferred by convection alone. More importantly, operating the WHB at a higher gas mass flux is shown to enhance reaction quenching, resulting in a doubling of the predicted hydrogen flow rate. This increase in hydrogen flow rate is sufficient to completely meet the hydrogen requirement of the H[sub 2]S recovery process considered, which would eliminate the need for a hydrogen plant.

Karan, K.; Mehrotra, A.K.; Behie, L.A. (Univ. of Calgary, Alberta (Canada). Dept. of Chemical and Petroleum Engineering)

1994-11-01T23:59:59.000Z

68

New Computer Model Pinpoints Prime Materials for Carbon Capture  

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

Model Pinpoints Prime Materials for Carbon Capture New Computer Model Pinpoints Prime Materials for Carbon Capture July 17, 2012 | Tags: Dirac, Energy Technologies, Materials...

69

Computational models of intergroup competition and warfare.  

SciTech Connect

This document reports on the research of Kenneth Letendre, the recipient of a Sandia Graduate Research Fellowship at the University of New Mexico. Warfare is an extreme form of intergroup competition in which individuals make extreme sacrifices for the benefit of their nation or other group to which they belong. Among animals, limited, non-lethal competition is the norm. It is not fully understood what factors lead to warfare. We studied the global variation in the frequency of civil conflict among countries of the world, and its positive association with variation in the intensity of infectious disease. We demonstrated that the burden of human infectious disease importantly predicts the frequency of civil conflict and tested a causal model for this association based on the parasite-stress theory of sociality. We also investigated the organization of social foraging by colonies of harvester ants in the genus Pogonomyrmex, using both field studies and computer models.

Letendre, Kenneth (University of New Mexico); Abbott, Robert G.

2011-11-01T23:59:59.000Z

70

Computational battery dynamics (CBD)--electrochemical/thermal coupled modeling and multi-scale modeling  

E-Print Network (OSTI)

Computational battery dynamics (CBD)--electrochemical/thermal coupled modeling and multi the development of first-principles based mathematical models for batteries developed on a framework parallel to computation fluid dynamics (CFD), herein termed computational battery dynamics (CBD). This general

71

CSE293 Computer Science & Engineering Design Laboratory Marklin Computer Controllable Model Trains Project  

E-Print Network (OSTI)

CSE293 Computer Science & Engineering Design Laboratory Marklin Computer Controllable Model Trains" of the system. The real time control is for, of all things, model railroading trains. If you had them as a kid trains, where there is digital control for every train (each train has an onboard computer), for switches

Demurjian, Steven A.

72

Models and Algorithms for Optical and Optoelectronic Parallel Computers  

E-Print Network (OSTI)

Models and Algorithms for Optical and Optoelectronic Parallel Computers Sartaj Sahni Dept/Fremantle, Australia #12;realization leads to the concept of optoelectronic computers­computers which have a mix the prespective of efficient algorithm design. The OTIS family of optoelectronic computers is a step

Sahni, Sartaj K.

73

E-Print Network 3.0 - activities including modelling Sample Search...  

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

models. We analyse five different developments, viz., Coordination Theory, Activity... Theory, Task Manager model, ActionInteraction Theory and Object-Oriented Activity Support...

74

Unsolicited Projects in 2012: Research in Computer Architecture, Modeling,  

Office of Science (SC) Website

2: Research in Computer Architecture, 2: Research in Computer Architecture, Modeling, and Evolving MPI for Exascale Advanced Scientific Computing Research (ASCR) ASCR Home About Research Applied Mathematics Computer Science Exascale Tools Workshop Programming Challenges Workshop Architectures I Workshop External link Architectures II Workshop External link Next Generation Networking Scientific Discovery through Advanced Computing (SciDAC) Computational Science Graduate Fellowship (CSGF) ASCR SBIR-STTR Facilities Science Highlights Benefits of ASCR Funding Opportunities Advanced Scientific Computing Advisory Committee (ASCAC) News & Resources Contact Information Advanced Scientific Computing Research U.S. Department of Energy SC-21/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-7486 F: (301)

75

Computability, inference and modeling in probabilistic programming  

E-Print Network (OSTI)

We investigate the class of computable probability distributions and explore the fundamental limitations of using this class to describe and compute conditional distributions. In addition to proving the existence of ...

Roy, Daniel Murphy

2011-01-01T23:59:59.000Z

76

Disruptive technology business models in cloud computing  

E-Print Network (OSTI)

Cloud computing, a term whose origins have been in existence for more than a decade, has come into fruition due to technological capabilities and marketplace demands. Cloud computing can be defined as a scalable and flexible ...

Krikos, Alexis Christopher

2010-01-01T23:59:59.000Z

77

Heliostat Field Optimization: A New Computationally Efficient Model and Biomimetic Layout  

E-Print Network (OSTI)

Heliostat Field Optimization: A New Computationally Efficient Model and Biomimetic Layout Corey J for heliostat field layout optimization are introduced. The model, described and validated herein, includes & blocking, aberration and atmospheric attenuation. The model is based on a discretization of the heliostats

78

Department of Computing CSP||B modelling for railway verification  

E-Print Network (OSTI)

University of Surrey Department of Computing Computing Sciences Report CS-12-03 CSP||B modelling Schneider Helen Treharne March 30th 2012 #12;CSP||B modelling for railway verification: the double junction work in verifying railway systems through CSP k B modelling and analysis. In particular we consider

Doran, Simon J.

79

A Skeptic's Guide to Computer Models by John D. Sterman  

E-Print Network (OSTI)

(Grant 1988). #12;D-4101-1 A SKEPTIC'S GUIDE TO COMPUTER MODELS 2 The Inevitability of Using ModelsA Skeptic's Guide to Computer Models by John D. Sterman This article was written by Dr. John D. Sterman, Director of the MIT System Dynamics Group and Professor of Management Science at the Sloan School

80

A computational model of the music of Stevie Ray Vaughan  

Science Journals Connector (OSTI)

Every musician who improvises has a unique musical vocabulary, which may be perceived in his or her compositions. In this paper, we explain our design of a computational model that predicts the creative decisions made by the blues musician, Stevie Ray ... Keywords: Stevie Ray Vaughan, computational modeling, creativity modeling, musical creativity, production system, schemas

Naresh Vempala; Subrata Dasgupta

2007-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "including computer modeling" 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

Modeling the Interaction between the Atmospheric and Oceanic Boundary Layers, Including a Surface Wave Layer  

Science Journals Connector (OSTI)

The interaction between the atmospheric and oceanic boundary layers is simulated by solving a closed system of equations including equations of motion, turbulent kinetic energy (TKE), turbulent exchange coefficient (TEC), expressions for air and ...

Le Ngoc Ly

1986-08-01T23:59:59.000Z

82

Computationally Efficient Modeling of High-Efficiency Clean Combustion...  

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

Volvo; multi-zone cycle simulation, OpenFOAM model development Bosch; High Performance Computing of HCCISI transition Delphi; direct injection GE Research; new...

83

Modeling-Computer Simulations At Fish Lake Valley Area (Deymonaz...  

Open Energy Info (EERE)

Additional References Retrieved from "http:en.openei.orgwindex.php?titleModeling-ComputerSimulationsAtFishLakeValleyArea(Deymonaz,EtAl.,2008)&oldid387627...

84

Modeling-Computer Simulations At Long Valley Caldera Geothermal...  

Open Energy Info (EERE)

Tempel, Et Al., 2011) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Long Valley Caldera Geothermal Area...

85

Modeling-Computer Simulations At Chocolate Mountains Area (Alm...  

Open Energy Info (EERE)

Area (Alm, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Chocolate Mountains Area (Alm, Et Al.,...

86

Modeling-Computer Simulations At White Mountains Area (Goff ...  

Open Energy Info (EERE)

GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At White Mountains Area (Goff & Decker, 1983) Exploration Activity Details Location White...

87

A model for including Arduino microcontroller programming in the introductory physics lab  

E-Print Network (OSTI)

The paper describes a curricular framework for introducing microcontroller programming in the University Physics lab. The approach makes use of Modeling Instruction, an effective approach for teaching science at the secondary level in which student learn the standard material by developing and deploying models of the physical world. In our approach, students engage with a context-rich problem that can be solved with one or more sensors and a microcontroller. The solution path we describe then consists of developing a mathematical model for how the sensors' data can be mapped to a meaningful measurement, and further, developing an algorithmic model that will be implemented in the microcontroller. Once the system is developed and implemented, students are given an array of similar problems in which they can deploy their data collection system. Results from the implementation of this idea, in two University Physics sections, using Arduino microcontrollers, are also described.

Haugen, Andrew J

2014-01-01T23:59:59.000Z

88

Computer  

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

trajectory, and estimate the accuracy of the reconstruction. First, a computer model is used to create images of the torus interior from any candidate camera...

89

Reduced-order Models for Computational Aeroelasticity  

E-Print Network (OSTI)

-direction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 7.1 Flowchart of FOM algorithm . . . . . . . . . . . . . . . . . . . . . . . 97 7.2 Flowchart of ROM algorithm . . . . . . . . . . . . . . . . . . . . . . 98 7.3 Computational time profile for FOM . . . . . . . . . . . . . . . . . . 99 7....4 Computational time profile for ROM . . . . . . . . . . . . . . . . . . 99 7.5 Ratio of computational time of ROM to FOM. . . . . . . . . . . . . . 100 xi LIST OF TABLES TABLE Page 4.1 Deforming mesh, transonic case: number of basis functions that led to ROM...

Freno, Brian Andrew

2013-11-08T23:59:59.000Z

90

Quantitative modelling of electricity consumption using computational intelligence aided design  

Science Journals Connector (OSTI)

Abstract High electricity consumption is of concern to the world for a variety of reasons, including its social-economic-environmental coupled impacts on well-being of individuals, social life and the federal energy policies. This paper proposes a quantitative model to examine the long-term relationship between annual electricity consumption and its major macroeconomic variables, including gross domestic product, electricity price, efficiency, economic structure, and carbon dioxide emission, using computational intelligence aided design (CIAD). It develops a firefly algorithm with variable population (FAVP) to obtain the parameters of the electricity consumption model through optimising two proposed trend indices: moving mean of the average precision (mmAP) and moving mean of standard derivation (mmSTD). The model is validated with empirical electricity consumption data in China between 1980 and 2012, based on which the error of approximations between 1980 and 2009 is ±15% and the error of predictions between 2010 and 2012 is [?8%, ?5%]. The main contributions of this research are to develop: (1) a novel quantitative model that can accurately predict the social, economic and environmental coupled impacts on the annual electricity demands; (2) the conceptual CIAD framework; (3) FAVP algorithm; and (4) two new trend indices of mmAP and mmSTD. The findings of this research can assist the decision makers in resolving the conflict between energy consumption growth and carbon emission reduction without dooming the economic prosperity in the long run.

Yi Chen; Guangfeng Zhang; Tongdan Jin; Shaomin Wu; Bei Peng

2014-01-01T23:59:59.000Z

91

Constraint-based Local Move Definitions for Lattice Protein Models Including Side Chains  

E-Print Network (OSTI)

in Cairo, 5th Settlement New Cairo City, Cairo, Egypt, mohamed.abdel-fattah@student.guc.edu.eg, 3 King are needed. Despite research over the last decades, a direct calculation of minimal energy structures in full efficient folding simulations [29, 31] while maintaining good modelling accuracy [25]. Folding simulations

Will, Sebastian

92

Population Pharmacokinetics of Rifampin in Pulmonary Tuberculosis Patients, Including a Semimechanistic Model To Describe Variable Absorption  

Science Journals Connector (OSTI)

...gastric emptying occurs, resulting in rapid uptake from the duodenum. However...conclude that the model is suitable for simulation using patient populations similar to...as long as it is borne in mind that simulations may overemphasize variability to a small...

Justin J. Wilkins; Radojka M. Savic; Mats O. Karlsson; Grant Langdon; Helen McIlleron; Goonaseelan Pillai; Peter J. Smith; Ulrika S. H. Simonsson

2008-04-07T23:59:59.000Z

93

Modeling-Computer Simulations At Valles Caldera - Redondo Area (Roberts, Et  

Open Energy Info (EERE)

Modeling-Computer Simulations At Valles Caldera - Redondo Area (Roberts, Et Modeling-Computer Simulations At Valles Caldera - Redondo Area (Roberts, Et Al., 1995) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Valles Caldera - Redondo Area (Roberts, Et Al., 1995) Exploration Activity Details Location Valles Caldera - Redondo Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Modeling of the amplitude data, using the Aki-Lamer method, confirmed that this anomaly exists and we estimated quantitative parameters defining it. All model parameters were physically meaningful except for one. The value for Q inside the anomaly, required to explain the data, was unrealistically low. This was probably due to the inability to include additional

94

A computational model to connect gestalt perception and natural language  

E-Print Network (OSTI)

We present a computational model that connects gestalt visual perception and language. The model grounds the meaning of natural language words and phrases in terms of the perceptual properties of visually salient groups. ...

Dhande, Sheel Sanjay, 1979-

2003-01-01T23:59:59.000Z

95

A model for the preventive maintenance scheduling of power plants including wind farms  

Science Journals Connector (OSTI)

Abstract This paper considers the problem of Power Plant Preventive Maintenance Scheduling (PPPMS). The goal is to evaluate which generators must stop production to be checked periodically for safety reasons. Preventive maintenance is crucial because a failure in a power plant may cause a general breakdown in an electric grid. This situation might result in a disruption of electric service to customers. The objective is to perform the problem of PPPMS from a reliability perspective, so the reliability of the system is maximized. The model presented considers the integration of wind power plants or wind farms into a traditional electric generating system comprising thermal, hydroelectric, and nuclear power units. The resulting model is categorized as an optimization problem. A case study based on a real power system is presented. Its main objective is to validate the efficiency of the proposed analysis.

Salvador Perez-Canto; Juan Carlos Rubio-Romero

2013-01-01T23:59:59.000Z

96

Model to interpret pulsed-field-gradient NMR data including memory and superdispersion effects  

Science Journals Connector (OSTI)

We propose a versatile model specifically designed for the quantitative interpretation of NMR velocimetry data. We use the concept of mobile or immobile tracer particles applied in dispersion theory in its Lagrangian form, adding two mechanisms: (i) independent random arrests of finite average representing intermittent periods of very low velocity zones in the mean flow direction and (ii) the possibility of unexpectedly long (but rare) displacements simulating the occurrence of very high velocities in the porous medium. Based on mathematical properties related to subordinated Lévy processes, we give analytical expressions of the signals recorded in pulsed-field-gradient NMR experiments. We illustrate how to use the model for quantifying dispersion from NMR data recorded for water flowing through a homogeneous grain pack column in single- and two-phase flow conditions.

Marie-Christine Néel; Daniela Bauer; Marc Fleury

2014-06-13T23:59:59.000Z

97

Applying High Performance Computing to Analyzing by Probabilistic Model Checking  

E-Print Network (OSTI)

Applying High Performance Computing to Analyzing by Probabilistic Model Checking Mobile Cellular on the use of high performance computing in order to analyze with the proba- bilistic model checker PRISM. The Figure Generation Script 22 2 #12;1. Introduction We report in this paper on the use of high performance

Schneider, Carsten

98

Computational Modeling of Conventionally Reinforced Concrete Coupling Beams  

E-Print Network (OSTI)

COMPUTATIONAL MODELING OF CONVENTIONALLY REINFORCED CONCRETE COUPLING BEAMS A Thesis by AJAY SESHADRI SHASTRI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of requirements... for the degree of MASTER OF SCIENCE December 2010 Major Subject: Civil Engineering Computational Modeling of Conventionally Reinforced Concrete Coupling Beams Copyright 2010...

Shastri, Ajay Seshadri

2012-02-14T23:59:59.000Z

99

Extension of thermonuclear functions through the pathway model including Maxwell-Boltzmann and Tsallis distributions  

E-Print Network (OSTI)

The Maxwell-Boltzmannian approach to nuclear reaction rate theory is extended to cover Tsallis statistics (Tsallis, 1988) and more general cases of distribution functions. An analytical study of respective thermonuclear functions is being conducted with the help of statistical techniques. The pathway model, recently introduced by Mathai (2005), is utilized for thermonuclear functions and closed-form representations are obtained in terms of H-functions and G-functions. Maxwell-Boltzmannian thermonuclear functions become particular cases of the extended thermonuclear functions. A brief review on the development of the theory of analytic representations of nuclear reaction rates is given.

H. J. Haubold; D. Kumar

2007-08-16T23:59:59.000Z

100

Modeling and Computational Strategies for Optimal Development Planning of Offshore Oilfields under Complex Fiscal Rules  

Science Journals Connector (OSTI)

Modeling and Computational Strategies for Optimal Development Planning of Offshore Oilfields under Complex Fiscal Rules ... In particular, we consider a recently proposed multifield site strategic planning model for offshore oil and gas fields as a basis to include the generic fiscal rules with ringfencing provisions. ...

Vijay Gupta; Ignacio E. Grossmann

2012-09-29T23:59:59.000Z

Note: This page contains sample records for the topic "including computer modeling" 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

Graphs of models for exploring design spaces in the engineering of Human Computer Interaction  

E-Print Network (OSTI)

Graphs of models for exploring design spaces in the engineering of Human Computer Interaction +33 (0)4 76 51 48 54 gaelle.calvary@imag.fr ABSTRACT Model Driven Engineering (MDE) has focused creativity in the early phases. Our research aims at stretching MDE all over the design process including

Paris-Sud XI, Université de

102

Computing the Electricity Market Equilibrium: Uses of market equilibrium models  

E-Print Network (OSTI)

1 Computing the Electricity Market Equilibrium: Uses of market equilibrium models Ross Baldick Abstract--In this paper we consider the formulation and uses of electric- ity market equilibrium models. Keywords--Electricity market, Equilibrium models I. INTRODUCTION Electricity market equilibrium modelling

Baldick, Ross

103

Computational Science Technical Note CSTN-004 An Agent Model Formulation of the Ising Model  

E-Print Network (OSTI)

0 Computational Science Technical Note CSTN-004 An Agent Model Formulation of the Ising Model K. A. Hawick 2003 The Ising model has proved an important test problem for many issues in computational physics for a spatial agent model. Keywords: Ising model; agent; update procedure BiBTeX reference: @TECHREPORT{CSTN-004

Hawick, Ken

104

A computational fluid dynamics model for wind simulation: model implementation and experimental validation  

Science Journals Connector (OSTI)

To provide physically based wind modelling for wind erosion research at regional scale, a 3D computational fluid dynamics (CFD) wind model was developed. The model was programmed ... analysis and modelling tool (...

Zhuo-dong Zhang; Ralf Wieland; Matthias Reiche…

2012-04-01T23:59:59.000Z

105

Modeling-Computer Simulations (Combs, Et Al., 1999) | Open Energy  

Open Energy Info (EERE)

Modeling-Computer Simulations (Combs, Et Al., 1999) Modeling-Computer Simulations (Combs, Et Al., 1999) Exploration Activity Details Location Unspecified Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Various models/simulations used to analyze data obtained from slimhole drilling. References Jim Combs, John T. Finger, Colin Goranson, Charles E. Hockox Jr., Ronald D. Jacobsen, Gene Polik (1999) Slimhole Handbook- Procedures And Recommendations For Slimhole Drilling And Testing In Geothermal Exploration Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_(Combs,_Et_Al.,_1999)&oldid=387232" Category: Exploration Activities What links here Related changes Special pages Printable version Permanent link Browse properties

106

Flexi-Cluster: A Simulator for a Single Compute Cluster Flexi-Cluster is a flexible, discrete-event simulation model for a single compute cluster,  

E-Print Network (OSTI)

-event simulation model for a single compute cluster, such as might be deployed within a compute grid. The model

107

Modeling-Computer Simulations At Cove Fort Area (Toksoz, Et Al, 2010) |  

Open Energy Info (EERE)

Modeling-Computer Simulations At Cove Fort Area (Toksoz, Et Al, 2010) Modeling-Computer Simulations At Cove Fort Area (Toksoz, Et Al, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Cove Fort Area (Toksoz, Et Al, 2010) Exploration Activity Details Location Cove Fort Geothermal Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown Notes We have collected various geophysical data around the geothermal field, including heat flow, gravity, MT, seismic surface wave phase and group velocity maps, seismic body wave travel time data and full seismic waveforms. All of these geophysical data sets have different strengths on characterizing subsurface structures and properties. Combining these data through a coordinated analysis and, when possible, by joint inversion

108

Computational models for the discovery of the world's music  

E-Print Network (OSTI)

://compmusic.upf.edu #12;compmusic MTG-Universitat Pompeu Fabra · Research in sound and music computing with a balance between basic and applied research. · Engineering strengths: · Signal Processing · Machine Learning · Human Computer Interaction · Research focus: · Audio signal processing (spectral modelling) · Sound

Verschure, Paul

109

Clique-detection Models in Computational Biochemistry and Genomics  

E-Print Network (OSTI)

Clique-detection Models in Computational Biochemistry and Genomics S. Butenko and W. E. Wilhelm,wilhelm}@tamu.edu Abstract Many important problems arising in computational biochemistry and genomics have been formulated and genomic aspects of the problems as well as to the graph-theoretic aspects of the solution approaches. Each

Butenko, Sergiy

110

Thermal building simulation and computer generation of nodal models  

E-Print Network (OSTI)

Thermal building simulation and computer generation of nodal models H. BOYER, J.P. CHABRIAT, B exchanges and finally in the constitution of thermal state models of the building. Big variations existing from one building to another, it's necessary to build the thermal model from the building description

Paris-Sud XI, Université de

111

COMPUTATIONAL FLUID DYNAMICS MODELING OF SOLID OXIDE FUEL CELLS  

E-Print Network (OSTI)

COMPUTATIONAL FLUID DYNAMICS MODELING OF SOLID OXIDE FUEL CELLS Ugur Pasaogullari and Chao-dimensional model has been developed to simulate solid oxide fuel cells (SOFC). The model fully couples current density operation. INTRODUCTION Solid oxide fuel cells (SOFC) are among possible candidates

112

Fracture Modeling of Crack Propagation in Wood and Wood Composites Including Crack Tip Processes and Fiber Bridging Mechanics  

E-Print Network (OSTI)

1 Fracture Modeling of Crack Propagation in Wood and Wood Composites Including Crack Tip Processes and Fiber Bridging Mechanics J. A. Nairn, N. Matsumoto Wood Science & Engineering, Oregon State University wood and wood composites develop process zones often consisting of fibers bridging the crack surfaces

Nairn, John A.

113

DOE Issues Funding Opportunity for Advanced Computational and Modeling  

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

Funding Opportunity for Advanced Computational and Funding Opportunity for Advanced Computational and Modeling Research for the Electric Power System DOE Issues Funding Opportunity for Advanced Computational and Modeling Research for the Electric Power System May 23, 2012 - 8:36am Addthis The objective of this Funding Opportunity Announcement (FOA) is to leverage scientific advancements in mathematics and computation for application to power system models and software tools, with the long-term goal of enabling real-time protection and control based on wide-area sensor measurements. Specifically, this FOA focuses on two foundational research challenges: 1) handling of large data sets to improve suitability for operational (and/or planning) models and analysis; and 2) "faster than real-time" simulations that improve understanding of

114

Low Dose Radiation Research Program: Use of Computational Modeling to  

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

Use of Computational Modeling to Evaluate Hypotheses about the Use of Computational Modeling to Evaluate Hypotheses about the Molecular and Cellular Mechanisms of Bystander Effects Authors: Yuchao “Maggie” Zhao and Rory Conolly Institutions: CIIT Centers for Health Research, 6 Davis Drive, Research Triangle Park, North Carolina A detailed understanding of the biological mechanisms of radiation-induced damage at the molecular and cellular levels is needed for accurate assessment of the shape of the dose-response curve for radiationinduced health effects in the intact organism. Computational models can contribute to the improved understanding of mechanisms through integration of data and quantitative evaluation of hypotheses. We propose to develop a novel computational model of bystander effects elicited by oxidative stress and a

115

LANL researchers use computer modeling to study HIV | National Nuclear  

National Nuclear Security Administration (NNSA)

researchers use computer modeling to study HIV | National Nuclear researchers use computer modeling to study HIV | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > LANL researchers use computer modeling to study HIV LANL researchers use computer modeling to study HIV Posted By Office of Public Affairs Los Alamos National Laboratory researchers are investigating the complex

116

Bioinformatics’ Challenges to Computer Science: Bioinformatics Tools and Biomedical Modeling  

Science Journals Connector (OSTI)

The second edition of the workshop on Bioinformatics’ Challenges to Computer Science aimed to discuss the gap between bioinformatics tools and biomedical simulation and modeling. This short paper summarizes th...

Mario Cannataro; Rodrigo Weber dos Santos…

2009-01-01T23:59:59.000Z

117

A Security Policy Implementation Model in Computational GRID  

Science Journals Connector (OSTI)

This paper analyzes the necessity of building a security policy implementation model in the Computational GRID. By choosing and establishing the functional entity ... course, we finally put forward a feasible security

Feng Li; Junzhou Luo

2004-01-01T23:59:59.000Z

118

15.094 Systems Optimization: Models and Computation, Spring 2002  

E-Print Network (OSTI)

A computational and application-oriented introduction to the modeling of large-scale systems in a wide variety of decision-making domains and the optimization of such systems using state-of-the-art optimization software. ...

Freund, Robert Michael

119

UPDATE February 2012 - The Food Crises: Predictive validation of a quantitative model of food prices including speculators and ethanol conversion  

E-Print Network (OSTI)

Increases in global food prices have led to widespread hunger and social unrest---and an imperative to understand their causes. In a previous paper published in September 2011, we constructed for the first time a dynamic model that quantitatively agreed with food prices. Specifically, the model fit the FAO Food Price Index time series from January 2004 to March 2011, inclusive. The results showed that the dominant causes of price increases during this period were investor speculation and ethanol conversion. The model included investor trend following as well as shifting between commodities, equities and bonds to take advantage of increased expected returns. Here, we extend the food prices model to January 2012, without modifying the model but simply continuing its dynamics. The agreement is still precise, validating both the descriptive and predictive abilities of the analysis. Policy actions are needed to avoid a third speculative bubble that would cause prices to rise above recent peaks by the end of 2012.

Lagi, Marco; Bertrand, Karla Z; Bar-Yam, Yaneer

2012-01-01T23:59:59.000Z

120

Personal Computer-Based Model for Cool Storage Performance Simulation  

E-Print Network (OSTI)

PERSONAL COMPUTER-BASED MODEL FOR COOL STORAGE PERFORMANCE SIMULATION Leszek M. Kasprowicz, Jerold W. Jones, and James Hitzfelder The University of Texas at Austin ust tin, ABSTRACT A personal computer based hourly simulation model... can be achieved by applying cool storage systems which use stored energy for air-conditioning purposes during peak periods. Customers benefit from cool storage in two ways. First, demand charges are reduced since customers with sufficient thermal...

Kasprowicz, L. M.; Jones, J. W.; Hitzfelder, J.

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "including computer modeling" 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

Sandia National Laboratories: Computational Modeling & Simulation  

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

is to model severe-accident progression in light-water-reactor (LWR) nuclear power plants. Sandia developed MELCOR for the US Nuclear Regulatory ... Sandian Presents on PV...

122

Final Report -- Center for Programmng Models for Scalable Parallel Computing (UIUC subgroup)  

SciTech Connect

The mission of the Center for Scalable Programming Models (Pmodels) was to create new ways of programming parallel computers that are much easier for humans to conceptualize, that allow programs to be written, updated and debugged quickly, and that run extremely efficiently---even on computers with thousands or even millions of processors. At UIUC, our work for Pmodels focused on support for I/O in a massively parallel environment, and included both research and technology transfer activities.

Marianne Winslett; Michael Folk

2007-03-31T23:59:59.000Z

123

A Variable Refrigerant Flow Heat Pump Computer Model in EnergyPlus  

SciTech Connect

This paper provides an overview of the variable refrigerant flow heat pump computer model included with the Department of Energy's EnergyPlusTM whole-building energy simulation software. The mathematical model for a variable refrigerant flow heat pump operating in cooling or heating mode, and a detailed model for the variable refrigerant flow direct-expansion (DX) cooling coil are described in detail.

Raustad, Richard A. [Florida Solar Energy Center

2013-01-01T23:59:59.000Z

124

Systems, methods and computer-readable media to model kinetic performance of rechargeable electrochemical devices  

DOE Patents (OSTI)

A system includes an electrochemical cell, monitoring hardware, and a computing system. The monitoring hardware samples performance characteristics of the electrochemical cell. The computing system determines cell information from the performance characteristics. The computing system also analyzes the cell information of the electrochemical cell with a Butler-Volmer (BV) expression modified to determine exchange current density of the electrochemical cell by including kinetic performance information related to pulse-time dependence, electrode surface availability, or a combination thereof. A set of sigmoid-based expressions may be included with the modified-BV expression to determine kinetic performance as a function of pulse time. The determined exchange current density may be used with the modified-BV expression, with or without the sigmoid expressions, to analyze other characteristics of the electrochemical cell. Model parameters can be defined in terms of cell aging, making the overall kinetics model amenable to predictive estimates of cell kinetic performance along the aging timeline.

Gering, Kevin L.

2013-01-01T23:59:59.000Z

125

Center for Scientific Computation And Mathematical Modeling  

E-Print Network (OSTI)

Modeling (CSCAMM) CSIC Building #406, Paint Branch Drive, University of Maryland, College Park CSCAMM rock avalanches. Our knowledge about these flows is exploding due to recent and planned robotic

Gruner, Daniel S.

126

Computer model of the MFTF-B neutral beam Accel dc power supply  

SciTech Connect

Using the SCEPTRE circuit modeling code, a computer model was developed for the MFTF Neutral Beam Power Supply System (NBPSS) Accel dc Power Supply (ADCPS). The ADCPS provides 90 kV, 88 A, to the Accel Modulator. Because of the complex behavior of the power supply, use of the computer model is necessary to adequately understand the power supply's behavior over a wide range of load conditions and faults. The model developed includes all the circuit components and parameters, and some of the stray values. The model has been well validated for transients with times on the order of milliseconds, and with one exception, for steady-state operation. When using a circuit modeling code for a system with a wide range of time constants, it can become impossible to obtain good solutions for all time ranges at once. The present model concentrates on the millisecond-range transients because the compensating capacitor bank tends to isolate the power supply from the load for faster transients. Attempts to include stray circuit elements with time constants in the microsecond and shorter range have had little success because of huge increases in computing time that result. The model has been successfully extended to include the accel modulator.

Wilson, J.H.

1983-11-30T23:59:59.000Z

127

COMPUTATIONAL MODELING OF MUONS PASSING THROUGH GAS PRESSURED RF CAVITIES  

E-Print Network (OSTI)

of muons passing through matter. PHYSICAL MODEL We start our study with a classical scattering of muonsCOMPUTATIONAL MODELING OF MUONS PASSING THROUGH GAS PRESSURED RF CAVITIES A. Samolov, A. Godunov, and to validate a technical design of these new accelerating facilities, accu- rate and comprehensive simulations

Godunov, Alexander L.

128

Computational Modeling of Brain Dynamics during Repetitive Head Motions  

E-Print Network (OSTI)

Computational Modeling of Brain Dynamics during Repetitive Head Motions Igor Szczyrba School motions in traumatic scenarios that are as- sociated with severe brain injuries. Our results are based on the linear Kelvin-Voigt brain injury model, which treats the brain matter as a viscoelastic solid, and on our

Burtscher, Martin

129

Modeling-Computer Simulations (Ozkocak, 1985) | Open Energy Information  

Open Energy Info (EERE)

Ozkocak, 1985) Ozkocak, 1985) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations (Ozkocak, 1985) Exploration Activity Details Location Unspecified Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown Notes CONTRIBUTION OF THE LATEST ADVANCES IN GEOLOGY, GEOCHEMISTRY AND GEOPHYSICS TO GEOTHERMAL PROSPECTING. Twenty-five papers were received on this topic, 14 of them concerning geology, four geochemistry and seven geophysics. The papers dealing with geology describe attempts to build models of underground geothermal activity and study the factors that control the formation of reservoir and cap rocks (regional plate tectonics, local tectonics, stratigraphy, geochemistry and volcanism) and the relations

130

Modeling-Computer Simulations (Lewicki & Oldenburg, 2004) | Open Energy  

Open Energy Info (EERE)

Modeling-Computer Simulations (Lewicki & Oldenburg, Modeling-Computer Simulations (Lewicki & Oldenburg, 2004) Exploration Activity Details Location Unspecified Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown Notes In this section we present numerical simulations of CO2 migration, seepage, and atmospheric dispersion. The purpose of these simulations is to evaluate the magnitudes and form of anomalous CO2 concentrations and fluxes that might be expected to emanate from a given model hidden geothermal system. From this information, we can design and evaluate potential monitoring and detection methods. References Jennifer L. Lewicki, Curtis M. Oldenburg (2004) Strategies For Detecting Hidden Geothermal Systems By Near-Surface Gas Monitoring Retrieved from

131

Modeling-Computer Simulations At Valles Caldera - Sulphur Springs Area  

Open Energy Info (EERE)

Wilt & Haar, 1986) Wilt & Haar, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Valles Caldera - Sulphur Springs Area (Wilt & Haar, 1986) Exploration Activity Details Location Valles Caldera - Sulphur Springs Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown Notes A computer program capable of two-dimensional modeling of gravity data was used in interpreting gravity observations along profiles A--A' and B--B' (Talwani et al., 1959). Densities of 2.12, 2.40, and 2.65 g/cm a were used for modeling the near-surface caldera fill, the underlying volcanics, and the basement sections, respectively (Fig. 8). Although correlation with well data was done whenever possible, there is some uncertainty to the

132

Systems, methods and computer-readable media for modeling cell performance fade of rechargeable electrochemical devices  

DOE Patents (OSTI)

A system includes an electrochemical cell, monitoring hardware, and a computing system. The monitoring hardware periodically samples performance characteristics of the electrochemical cell. The computing system determines cell information from the performance characteristics of the electrochemical cell. The computing system also develops a mechanistic level model of the electrochemical cell to determine performance fade characteristics of the electrochemical cell and analyzing the mechanistic level model to estimate performance fade characteristics over aging of a similar electrochemical cell. The mechanistic level model uses first constant-current pulses applied to the electrochemical cell at a first aging period and at three or more current values bracketing a first exchange current density. The mechanistic level model also is based on second constant-current pulses applied to the electrochemical cell at a second aging period and at three or more current values bracketing the second exchange current density.

Gering, Kevin L

2013-08-27T23:59:59.000Z

133

Low Dose Radiation Research Program: Computational Modeling of Biochemical  

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

Computational Modeling of Biochemical Pathways Linking Ionizing Computational Modeling of Biochemical Pathways Linking Ionizing Radiation to Cell Cycle Arrest, Apoptosis, and Tumor Incidence Authors: Yuchao Maggie Zhao and Rory Conolly Institutions: Center for Computational Systems Biology CIIT Centers for Health Research Long-Range Goal: To develop an integrated, computational framework for the prediction of low-dose-response to ionizing radiation (IR) in people. Methodology: To provide a flexible framework to evaluate mechanisms of cellular adaptive responses after exposure to IR, three progressively more complicated descriptions of biochemical pathways linking DNA damage with cell-cycle checkpoint control and apoptosis were developed. These descriptions focus on p53-dependent checkpoint arrest and apoptosis, p73-dependent apoptosis, and Chk2-dependent checkpoint arrest,

134

Computational Modelling of Nonlinear Calcium Waves  

E-Print Network (OSTI)

The calcium transport in biological systems is modelled as a reaction-diffusion process. Nonlinear calcium waves are then simulated using a stochastic cellular automaton whose rules are derived from the corresponding coupled partial differential equations. Numerical simulations show self-organized criticality in the complex calcium waves and patterns. Both the stochastic cellular automaton approach and the equation-based simulations can predict the characteristics of calcium waves and complex pattern formation. The implication of locality of calcium distribution with positional information in biological systems is also discussed.

Xin-She Yang

2010-03-28T23:59:59.000Z

135

Carbonaceous Chemistry for Computational Modeling Licensing and Partnership Opportunity  

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

Chemistry for Computational Modeling Chemistry for Computational Modeling Opportunity The Department of Energy's National Energy Technology Laboratory (NETL) has developed a software platform entitled Carbonaceous Chemistry for Computational Modeling (C3M) that is used to access a variety of kinetic processes and reaction mechanisms typically found in coal gasification, gas clean-up, and carbon capture processes. This unique software provides the user the ability to conduct virtual kinetic experiments using leading kinetic packages and available experimental data to evaluate kinetic predictions as a function of fuel and sorbent type and/or operating conditions. A Patent Cooperation Treaty application was filed in June 2008. NETL is seeking non-exclusive licensing partners interested in implementing

136

Develop baseline computational model for proactive welding stress  

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

Develop baseline computational model for proactive welding stress Develop baseline computational model for proactive welding stress management to suppress helium induced cracking during weld repair Develop baseline computational model for proactive welding stress management to suppress helium induced cracking during weld repair There are over 100 nuclear power plants operating in the U.S., which generate approximately 20% of the nation's electricity. These plants range from 15 to 40 years old. Extending the service lives of the current fleet of nuclear power plants beyond 60 years is imperative to allow for the environmentally-sustainable energy infrastructure being developed and matured. Welding repair of irradiated nuclear reactor materials (such as austenitic stainless steels) is especially challenging because of the

137

Computer modeling reveals how surprisingly potent hepatitis C drug works  

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

Hepatitis C computer modeling Hepatitis C computer modeling Computer modeling reveals how surprisingly potent hepatitis C drug works A study reveals how daclatasvir targets one of its proteins and causes the fastest viral decline ever seen with anti-HCV drugs - within 12 hours of treatment. February 19, 2013 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials.

138

Modeling-Computer Simulations (Laney, 2005) | Open Energy Information  

Open Energy Info (EERE)

Modeling-Computer Simulations (Laney, 2005) Modeling-Computer Simulations (Laney, 2005) Exploration Activity Details Location Unspecified Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown Notes Design of Sampling Strategies to Detect CO2 Emissions From Hidden Geothermal Systems, Lewicki, Oldenburg and Kennedy. The objective of this project is to investigate geothermal CO2 monitoring in the near surface as a tool to discover hidden geothermal reservoirs. A primary goal of this project is to develop an approach that places emphasis on cost and time-efficient near-surface exploration methods and yields results to guide and focus more cost-intensive geophysical measurements, installation of deep wells, and geochemical analyses of deep fluids. To this end, we

139

On Poisson Graphical Models Department of Computer Science  

E-Print Network (OSTI)

count data, which are increasingly ubiquitous in big-data settings such as genomic sequencing data, user are increasingly ubiquitous in big-data 1 #12;settings, including high-throughput genomic sequencing data, spatial pradeepr@cs.utexas.edu Genevera I. Allen Department of Statistics and Electrical & Computer Engineering

Ravikumar, Pradeep

140

Modeling-Computer Simulations At Raft River Geothermal Area (1979) | Open  

Open Energy Info (EERE)

Jump to: navigation, search Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Raft River Geothermal Area (1979) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Modeling-Computer Simulations Activity Date 1979 Usefulness useful DOE-funding Unknown Exploration Basis To evaluate the hydrodynamics of the unconfined aquifer. Notes This study covers about 1000 mi2 (2600 km2) of the southern Raft River drainage basin in south-central Idaho and northwest Utah. The main area of interest, approximately 200 mi2 (520 km2) of semiarid agricultural and rangeland in the southern Raft River Valley that includes the known Geothermal Resource Area near Bridge, Idaho, was modelled numerically. Computed and estimated transmissivity values range from 1200 ft2 per day

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


141

Modeling-Computer Simulations At Dixie Valley Geothermal Field Area  

Open Energy Info (EERE)

Dixie Valley Geothermal Field Area Dixie Valley Geothermal Field Area (Kennedy & Van Soest, 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Dixie Valley Geothermal Field Area (Kennedy & Van Soest, 2006) Exploration Activity Details Location Dixie Valley Geothermal Field Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Using a simple one-dimensional steady-state fluid flow model, the helium content and isotopic composition imply vertical fluid flow rates from the mantle of _7 mm/yr. This is a strict lower limit to the fluid flow rate: the one-dimensional model does not consider diffusive re-distribution of helium or mixing with water containing only a crustal helium component and

142

Formalization of computer input and output: the Hadley model  

Science Journals Connector (OSTI)

Current digital evidence acquisition tools are effective, but are tested rather than formally proven correct. We assert that the forensics community will benefit in evidentiary ways and the scientific community will benefit in practical ways by moving beyond simple testing of systems to a formal model. To this end, we present a hierarchical model of peripheral input to and output from von Neumann computers, patterned after the Open Systems Interconnection model of networking. The Hadley model categorizes all components of peripheral input and output in terms of data flow; with constructive aspects concentrated in the data flow between primary memory and the computer sides of peripherals' interfaces. The constructive domain of Hadley is eventually expandable to all areas of the I/O hierarchy, allowing for a full view of peripheral input and output and enhancing the forensics community's capabilities to analyze, obtain, and give evidentiary force to data.

Matthew Gerber; John Leeson

2004-01-01T23:59:59.000Z

143

Multimodal Approach for Emotion Recognition Using a Formal Computational Model  

Science Journals Connector (OSTI)

Emotions play a crucial role in human-computer interaction. They are generally expressed and perceived through multiple modalities such as speech, facial expressions, physiological signals. Indeed, the complexity of emotions makes the acquisition very ... Keywords: Algebraic Representation, Emotion Recognition, Modalities, Multidimensional Model, Multimodal Approach

Imen Tayari Meftah, Nhan Le Thanh, Chokri Ben Amar

2013-07-01T23:59:59.000Z

144

COMPUTATIONAL MODELING OF CONCRETE FLOW: STATE OF THE ART  

E-Print Network (OSTI)

concretes such as Self-Compacting Concrete (SCC) tools for prediction of the form filling of SCC are neededCOMPUTATIONAL MODELING OF CONCRETE FLOW: STATE OF THE ART Nicolas Roussel Laboratoire Central des Lars N. Thrane Concrete Centre, Danish Technological Institute Peter Szabo Department of Chemical

Boyer, Edmond

145

Global sensitivity analysis of computer models with functional inputs  

E-Print Network (OSTI)

function. Lastly, the new methodology is applied to an industrial computer code that simulates the nuclear with scalar input variables. For example, in the nuclear engineering domain, global SA tools have been applied (Helton et al. [7]), environmental model of dose calculations (Iooss et al. [10]), reactor dosimetry

Boyer, Edmond

146

Generalized Rough Set Models Department of Computer Science  

E-Print Network (OSTI)

Generalized Rough Set Models Y.Y. Yao Department of Computer Science Lakehead University Thunder the rough set theory in early eighties, many proposals have been made for generalizing and interpreting rough sets [3, 4, 19, 27, 37, 38, 39, 46, 47, 51, 52, 54, 55, 63, 65, 66, 67, 68, 69, 70, 71, 72, 83, 92

Yao, Yiyu

147

Computational methods for several models of ice stream flow  

E-Print Network (OSTI)

on any grid Shallow ice approximation produces oscillatory solutions Nonlinear and linear solvers haveComputational methods for several models of ice stream flow Jed Brown Laboratory of Hydrology transition at ice stream margins Bed slope is discontinuous and of order 1. Taylor expansions no longer valid

Brown, Jed

148

Modeling-Computer Simulations At Yellowstone Region (Laney, 2005) | Open  

Open Energy Info (EERE)

Laney, 2005) Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Yellowstone Region (Laney, 2005) Exploration Activity Details Location Yellowstone Caldera Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful regional reconnaissance DOE-funding Unknown Notes Localized Strain as a Discriminator of Hidden Geothermal Systems, Vasco and Foxall, 2005. Recent work has focused on (1) collaborating with Alessandro Ferretti to use Permanent Scatterer (PS) InSAR data to infer strain at depth, (2) working with Lane Johnson to develop a dynamic faulting model, and (3) acquiring InSAR data for the region surrounding the Dixie Valley fault zone in collaboration with Dr. William Foxall of LLNL. The InSAR data

149

Modeling-Computer Simulations At Central Nevada Seismic Zone Region  

Open Energy Info (EERE)

Central Nevada Seismic Zone Region Central Nevada Seismic Zone Region (Blackwell, Et Al., 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Central Nevada Seismic Zone Region (Blackwell, Et Al., 2003) Exploration Activity Details Location Central Nevada Seismic Zone Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Developed natural state mass and energy transport fluid flow models of generic Basin and Range systems based on Dixie Valley data that help to understand the nature of large scale constraints on the location and characteristics of the geothermal systems References D. D. Blackwell, K. W. Wisian, M. C. Richards, Mark Leidig, Richard Smith, Jason McKenna (2003) Geothermal Resource Analysis And Structure Of

150

Mnemonic Structure and Sociality: A Computational Agent-Based Simulation Model  

E-Print Network (OSTI)

Mnemonic Structure and Sociality: A Computational Agent-Based Simulation Model Claudio Cioffi-agent social simulation models are designed with agents lacking explicit internal information transformations affect human and social dynamics? Most computational multi-agent social simulation models

George Mason University

151

E-Print Network 3.0 - analytic computer model Sample Search Results  

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

Calibration of Traffic Simulation Models Summary: users. INTRODUCTION Background With the rapid advancement of computer technology, numerical modeling has... the traffic model is...

152

The origins of computer weather prediction and climate modeling  

SciTech Connect

Numerical simulation of an ever-increasing range of geophysical phenomena is adding enormously to our understanding of complex processes in the Earth system. The consequences for mankind of ongoing climate change will be far-reaching. Earth System Models are capable of replicating climate regimes of past millennia and are the best means we have of predicting the future of our climate. The basic ideas of numerical forecasting and climate modeling were developed about a century ago, long before the first electronic computer was constructed. There were several major practical obstacles to be overcome before numerical prediction could be put into practice. A fuller understanding of atmospheric dynamics allowed the development of simplified systems of equations; regular radiosonde observations of the free atmosphere and, later, satellite data, provided the initial conditions; stable finite difference schemes were developed; and powerful electronic computers provided a practical means of carrying out the prodigious calculations required to predict the changes in the weather. Progress in weather forecasting and in climate modeling over the past 50 years has been dramatic. In this presentation, we will trace the history of computer forecasting through the ENIAC integrations to the present day. The useful range of deterministic prediction is increasing by about one day each decade, and our understanding of climate change is growing rapidly as Earth System Models of ever-increasing sophistication are developed.

Lynch, Peter [Meteorology and Climate Centre, School of Mathematical Sciences, University College Dublin, Belfield (Ireland)], E-mail: Peter.Lynch@ucd.ie

2008-03-20T23:59:59.000Z

153

Action Models: A Reliability Modeling Formalism for Fault-Tolerant Distributed Computing Systems  

E-Print Network (OSTI)

Action Models: A Reliability Modeling Formalism for Fault-Tolerant Distributed Computing Systems. Introduction Model-based evaluation of the reliability of distributed systems has traditionally required expert- proach to analyze the reliability of fault-tolerant distributed systems. More in particular, we want

Newcastle upon Tyne, University of

154

MaRIE theory, modeling and computation roadmap executive summary  

SciTech Connect

The confluence of MaRIE (Matter-Radiation Interactions in Extreme) and extreme (exascale) computing timelines offers a unique opportunity in co-designing the elements of materials discovery, with theory and high performance computing, itself co-designed by constrained optimization of hardware and software, and experiments. MaRIE's theory, modeling, and computation (TMC) roadmap efforts have paralleled 'MaRIE First Experiments' science activities in the areas of materials dynamics, irradiated materials and complex functional materials in extreme conditions. The documents that follow this executive summary describe in detail for each of these areas the current state of the art, the gaps that exist and the road map to MaRIE and beyond. Here we integrate the various elements to articulate an overarching theme related to the role and consequences of heterogeneities which manifest as competing states in a complex energy landscape. MaRIE experiments will locate, measure and follow the dynamical evolution of these heterogeneities. Our TMC vision spans the various pillar science and highlights the key theoretical and experimental challenges. We also present a theory, modeling and computation roadmap of the path to and beyond MaRIE in each of the science areas.

Lookman, Turab [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

155

Computationally Efficient Use of Derivatives in Emulation of Complex Computational Models  

SciTech Connect

We will investigate the use of derivative information in complex computer model emulation when the correlation function is of the compactly supported Bohman class. To this end, a Gaussian process model similar to that used by Kaufman et al. (2011) is extended to a situation where first partial derivatives in each dimension are calculated at each input site (i.e. using gradients). A simulation study in the ten-dimensional case is conducted to assess the utility of the Bohman correlation function against strictly positive correlation functions when a high degree of sparsity is induced.

Williams, Brian J. [Los Alamos National Laboratory; Marcy, Peter W. [University of Wyoming

2012-06-07T23:59:59.000Z

156

Long-Range Atmospheric Transport of Polycyclic Aromatic Hydrocarbons: A Global 3-D Model Analysis Including Evaluation of Arctic Sources  

E-Print Network (OSTI)

We use the global 3-D chemical transport model GEOS-Chem to simulate long-range atmospheric transport of polycyclic aromatic hydrocarbons (PAHs). To evaluate the model’s ability to simulate PAHs with different volatilities, ...

Friedman, Carey

157

Scientists model brain structure to help computers recognize objects  

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

Do you see what I see? Do you see what I see? Scientists model brain structure to help computers recognize objects The team tried developing a computer model based on human neural structure and function, to do what we do, and possibly do it better. December 20, 2011 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials.

158

Martin Karplus and Computer Modeling for Chemical Systems  

Office of Scientific and Technical Information (OSTI)

Martin Karplus and Computer Modeling for Chemical Systems Martin Karplus and Computer Modeling for Chemical Systems Resources with Additional Information · Karplus Equation Martin Karplus ©Portrait by N. Pitt, 9/10/03 Martin Karplus, the Theodore William Richards Professor of Chemistry Emeritus at Harvard, is one of three winners of the 2013 Nobel Prize in chemistry... The 83-year-old Vienna-born theoretical chemist, who is also affiliated with the Université de Strasbourg, Strasbourg, France, is a 1951 graduate of Harvard College and earned his Ph.D. in 1953 at the California Institute of Technology. While there, he worked with two-time Nobel laureate Linus Pauling, whom Karplus described as an important early influence. He shared the Nobel with researchers Michael Levitt of Stanford University and Arieh Warshel of the University of Southern California, Los Angeles. Warshel was once a postdoctoral student of Karplus ...

159

Use of high performance computing resources for underwater acoustic modeling.  

Science Journals Connector (OSTI)

The majority of standard underwater propagation models provide a two?dimensional (range and depth) acoustic field for a single frequency point source. Computational resource demand increases considerably when the three?dimensional acoustic field of a broad?band spatially extended source is of interest. An upgrade of the standard parabolic equationmodel RAM for use in a high?performance computing (HPC) environment is discussed. A benchmarked upgraded version of RAM is used in the Louisiana Optical Network Initiative HPC?environment to model the three?dimensional acoustic field of a seismic airgun array. Four?dimensional visualization (time and space) of the generated data volume is also addressed. [Research supported by the Louisiana Optical Network Initiative TeraGrid Fellowship and the Joint Industry Programme through the International Association of Oil and Gas Producers.

Anca M. Niculescu; Natalia A. Sidorovskaia; Peter Achi; Arslan M. Tashmukhambetov; George E. Ioup; Juliette W. Ioup

2009-01-01T23:59:59.000Z

160

Final Report: Center for Programming Models for Scalable Parallel Computing  

SciTech Connect

As part of the Center for Programming Models for Scalable Parallel Computing, Rice University collaborated with project partners in the design, development and deployment of language, compiler, and runtime support for parallel programming models to support application development for the “leadership-class” computer systems at DOE national laboratories. Work over the course of this project has focused on the design, implementation, and evaluation of a second-generation version of Coarray Fortran. Research and development efforts of the project have focused on the CAF 2.0 language, compiler, runtime system, and supporting infrastructure. This has involved working with the teams that provide infrastructure for CAF that we rely on, implementing new language and runtime features, producing an open source compiler that enabled us to evaluate our ideas, and evaluating our design and implementation through the use of benchmarks. The report details the research, development, findings, and conclusions from this work.

Mellor-Crummey, John [William Marsh Rice University] [William Marsh Rice University

2011-09-13T23:59:59.000Z

Note: This page contains sample records for the topic "including computer modeling" 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

Dynamic Incompressible Navier-Stokes Model of Catalytic Converter in 1-D Including Fundamental Oxidation Reaction Rate Expressions  

E-Print Network (OSTI)

, this work includes the history of the fundamental reactions of automotive catalysts including carbon monoxide (CO), hydrogen (H2) and nitric oxide (NO) oxidation on a widely used material formulation (platinum catalyst on alumina washcoat). A detailed report...

Loya, Sudarshan Kedarnath

2011-12-31T23:59:59.000Z

162

A computer model for the transient analysis of compact research reactors with plate type fuel  

SciTech Connect

A coupled neutronics and core thermal-hydraulic performance model has been developed for the analysis of plate type U-Al fueled high-flux research reactor transients. The model includes point neutron kinetics, one-dimensional, non-homogeneous, equilibrium two-phase flow and beat transfer with provision for subcooled boiling, and spatially averaged one-dimensional beat conduction. The feedback from core regions other than the fuel elements is included by employing a lumped parameter approach. Partial differential equations are discretized in space and the combined equation set representing the model is converted to an initial value problem. A variable-order, variable-time-step time advancement scheme is used to solve these ordinary differential equations. The model is verified through comparisons with two other computer code results and partially validated against SPERT-II tests. It is also used to analyze a series of HFIR reactivity transients.

Sofu, T. [Argonne National Lab., IL (United States); Dodds, H.L. [Tennessee Univ., Knoxville, TN (United States). Dept. of Nuclear Engineering

1994-03-01T23:59:59.000Z

163

HPPC EUROPAR August 31 Naples | Computer Architecture Group, Dept. Computer Science | 1 The Massively Parallel Computing Model GCA  

E-Print Network (OSTI)

HPPC ­ EUROPAR August 31 Naples | Computer Architecture Group, Dept. Computer Science | 1 Architecure Group #12;HPPC ­ EUROPAR August 31 Ischia | Computer Architecture Group, Dept. Computer Science Architecture Group, Dept. Computer Science | 3 Outline PART I: Global Cellular Automata (GCA) Cellular

Hoffmann, Rolf

164

Medical Nuclear Supply Chain Design: A Tractable Network Model and Computational  

E-Print Network (OSTI)

Medical Nuclear Supply Chain Design: A Tractable Network Model and Computational Approach Anna Medical Nuclear Supply Chain Design #12;Outline Background and Motivation Supply Chain Challenges The Medical Nuclear Supply Chain Network Design Model The Computational Approach Summary and Suggestions

Nagurney, Anna

165

A Vast Machine: Computer Models, Climate Data, and the Politics of Global Warming  

E-Print Network (OSTI)

Review: A Vast Machine: Computer Models, Climate Data, andEdwards, Paul N. A Vast Machine: Computer Models, ClimateEdwards, Paul N. 2004. "A vast machine: standards as social

Maret, Susan

2011-01-01T23:59:59.000Z

166

EconoGrid: A detailed Simulation Model of a Standards-based Grid Compute Economy  

E-Print Network (OSTI)

EconoGrid: A detailed Simulation Model of a Standards-based Grid Compute Economy EconoGrid is a detailed simulation model, implemented in SLX1 , of a grid compute economy that implements selected

167

CURRENT - A Computer Code for Modeling Two-Dimensional, Chemically Reaccting, Low Mach Number Flows  

SciTech Connect

This report documents CURRENT, a computer code for modeling two- dimensional, chemically reacting, low Mach number flows including the effects of surface chemistry. CURRENT is a finite volume code based on the SIMPLER algorithm. Additional convergence acceleration for low Peclet number flows is provided using improved boundary condition coupling and preconditioned gradient methods. Gas-phase and surface chemistry is modeled using the CHEMKIN software libraries. The CURRENT user-interface has been designed to be compatible with the Sandia-developed mesh generator and post processor ANTIPASTO and the post processor TECPLOT. This report describes the theory behind the code and also serves as a user`s manual.

Winters, W.S.; Evans, G.H.; Moen, C.D.

1996-10-01T23:59:59.000Z

168

Insights gained from solvable models into a variety of phase transitions, including emergent assemblies plus isoelectronic series of atomic ions  

E-Print Network (OSTI)

Three solvable models are set out in some detail in reviewing different types of phase transitions. Two of these relate directly to emergent critical phenomena, viz. melting and magnetic transitions in heavy rare-earth metals, and secondly, via the $3d$ Ising model, to critical behaviour in an insulating ferromagnet such as CrBr$_3$. The final `transition', however, concerns ionization of an electron in an isoelectronic series with $N$ electrons as the atomic number $Z$ is reduced below that of the neutral atom. These solvable models are, throughout, brought into contact either with experiment, or with very precise numerical modelling on real materials.

March, N H; Pucci, R

2014-01-01T23:59:59.000Z

169

The Faculty of Technology of Bielefeld University was founded in May 1990. It includes the divisions of Biotechnology and Computer Science, and currently  

E-Print Network (OSTI)

the divisions of Biotechnology and Computer Science, and currently comprises fifteen work groups. It has in the Natural Sciences, Bioinformatics and Genome Research and Molecular Biotechnology realize this commitment, biotechnology and genetics of blood coagulation inhibitors · Fermentation Engineering Optimization of processes

Moeller, Ralf

170

Computational experience with a three-dimensional rotary engine combustion model  

SciTech Connect

A new computer code was developed to analyze the chemically reactive flow and spray combustion processes occurring inside a stratified-charge rotary engine. Mathematical and numerical details of the new code were recently described by the present authors. The results are presented of limited, initial computational trials as a first step in a long-term assessment/validation process. The engine configuration studied was chosen to approximate existing rotary engine flow visualization and hot firing test rigs. Typical results include: (1) pressure and temperature histories, (2) torque generated by the nonuniform pressure distribution within the chamber, (3) energy release rates, and (4) various flow-related phenomena. These are discussed and compared with other predictions reported in the literature. The adequacy or need for improvement in the spray/combustion models and the need for incorporating an appropriate turbulence model are also discussed.

Raju, M.S.; Willis, E.A.

1990-04-01T23:59:59.000Z

171

Detailed modelling, implementation and simulation of an “all-in-one” stability test system including power system protective devices  

Science Journals Connector (OSTI)

This paper presents modelling and simulation results for multiple instability scenarios of the “all-in-one” test system. The test system is an alteration of the Bonneville Power Administration test system constructed to capture transient (angle), frequency and voltage instability phenomena, resulting in system collapse, within one system. The paper describes general overview of the test system and its associated individual devices modelling. These modelling are both customized and adapted from the built-in model developed by PowerFactory simulation software. The paper also provides a description of different instabilities that can be reproduced by this self-contained system. One of the case study is demonstrated in detail with the necessary initialization settings for reproducing instability scenario.

Rujiroj Leelaruji; Luigi Vanfretti

2012-01-01T23:59:59.000Z

172

Numerical modeling of time-lapse seismic data from fractured reservoirs including fluid flow and geochemical processes  

E-Print Network (OSTI)

Discrete Fracture Network (DFN) models. My seismic simulation study suggests that CO2 saturated reservoir shows approximately ten times more attenuation than brine saturated reservoir. Similarly, large P-wave velocity variation in CO2 saturated reservoir...

Shekhar, Ravi

2009-05-15T23:59:59.000Z

173

Wear resistance optimisation of composite coatings by computational microstructural modelling  

Science Journals Connector (OSTI)

Abstract The wear resistance of components can be changed remarkably by surface coatings. New processing methods offer many possibilities to tailor the wear resistance of surfaces to match design criteria. Computational modelling and simulation is a systematic approach to optimise the wear performance. Modelling of physical surface phenomena can be carried out on all spatial scale levels, from sub-atomic one to macrolevel and for the various stages in material development, from material processing to structures, properties and performance. The interactions between the coating matrix, the reinforced particles, degraded material phases and defects like pores, cracks and voids are of crucial importance for the wear performance of composite coatings. This has been modelled by synthetic artificial models to find general design rules and by real image based models to find out the wear behaviour of specific coatings. The effect of particle size, morphology, clusters, mean free path and porosity was simulated for thermal spray WC–CoCr coatings. Four main very typical mechanisms for crack initiation resulting in surface failure have been identified: brittle carbide fracture, ductile binder cracking, interface failure, and cracking from pre-existing porosities and defects. The most important coating properties having a crucial effect on coating wear resistance are defects in the coating structure as they can create detrimental stress peaks and high strain levels, particle clustering is most critical for the durability of the structure, the elasticity of the particle is of great importance as well as matrix hardness and particle morphology.

Kenneth Holmberg; Anssi Laukkanen; Erja Turunen; Tarja Laitinen

2014-01-01T23:59:59.000Z

174

A computer-based total productive maintenance model for electric motors  

Science Journals Connector (OSTI)

The paper describes the development of a computer-based total productive maintenance (TPM) model to improve electrical motors readiness and uptime while reducing capital overhead. The TPM model includes the consideration of reactive, periodic, and predictive practices. The input data is processed and the generated report details a set of periodic recommendations providing guidelines on recommended actions and their frequency. The details about test results indicating the current condition of the motor as well estimated reactive, periodic, and predictive maintenance cost details are presented. Based on the historic data stored in its database, the model can predict potential problems prior to failure as well as prescribe periodic maintenance actions to maximise motor life. The TPM model will be a useful tool to predict the degradation in motor life due to deterioration in insulation, bearing, rotor bar and stator windings of the motor.

Aruna Muniswamy; Bhaskaran Gopalakrishnan; Subodh Chaudhari; Majid Jaridi; Ed Crowe; Deepak Gupta

2014-01-01T23:59:59.000Z

175

A simple computational model for Stirling cycle refrigerators  

SciTech Connect

This paper presents a simple computational model for an Alpha Free-Pistons Stirling refrigerator. The model assumes isothermal workspaces, where the compression space is maintained at temperature TH, while the expansion space is maintained at temperature TL. The regenerator is assumed to have a linear temperature distribution along its axial direction, with the working fluid taken as an ideal gas. This model is based on a control volume type analysis in which each of the components of the refrigerator (the regenerator and each of the two workspaces) is considered a separate control volume. Moving the compression piston in a predetermined sinusoidal motion provides the work input to the cycle. The motion of the compression space piston generates a pressure difference across the refrigerator, and forces the working fluid to pass through the regenerator. The expansion piston responds to the pressure in its workspace according to Newton's second law of motion. In this way the dynamics of the moving pistons will be coupled to the thermodynamics of the refrigerator system. Conservation laws of mass, momentum and energy along with ideal gas relations are used to form a set of differential and algebraic equations fully describing the refrigerator system. The motion of the expansion piston, the state of the working fluid at each workspace, and the energy terms appearing in the definition of the COP, can all be obtained. A marching-in-time technique with a Runge-Kutta scheme of the fourth order is adapted to integrate the equation of motion of the expansion piston. System behavior can be represented by the motion of the two pistons with time, and also by the pressure-volume diagrams of the workspaces. The COP plots can be produced from the computational results to describe the performance of the refrigerator.

Al-Hazmy, M.M.; Peterson, R.B.

1998-07-01T23:59:59.000Z

176

Computing  

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

assetsimagesicon-science.jpg Computing Providing world-class high performance computing capability that enables unsurpassed solutions to complex problems of...

177

Compare Energy Use in Variable Refrigerant Flow Heat Pumps Field Demonstration and Computer Model  

SciTech Connect

Variable Refrigerant Flow (VRF) heat pumps are often regarded as energy efficient air-conditioning systems which offer electricity savings as well as reduction in peak electric demand while providing improved individual zone setpoint control. One of the key advantages of VRF systems is minimal duct losses which provide significant reduction in energy use and duct space. However, there is limited data available to show their actual performance in the field. Since VRF systems are increasingly gaining market share in the US, it is highly desirable to have more actual field performance data of these systems. An effort was made in this direction to monitor VRF system performance over an extended period of time in a US national lab test facility. Due to increasing demand by the energy modeling community, an empirical model to simulate VRF systems was implemented in the building simulation program EnergyPlus. This paper presents the comparison of energy consumption as measured in the national lab and as predicted by the program. For increased accuracy in the comparison, a customized weather file was created by using measured outdoor temperature and relative humidity at the test facility. Other inputs to the model included building construction, VRF system model based on lab measured performance, occupancy of the building, lighting/plug loads, and thermostat set-points etc. Infiltration model inputs were adjusted in the beginning to tune the computer model and then subsequent field measurements were compared to the simulation results. Differences between the computer model results and actual field measurements are discussed. The computer generated VRF performance closely resembled the field measurements.

Sharma, Chandan; Raustad, Richard

2013-06-01T23:59:59.000Z

178

Computer modeling of single-cell and multicell thermionic fuel elements  

SciTech Connect

Modeling efforts are undertaken to perform coupled thermal-hydraulic and thermionic analysis for both single-cell and multicell thermionic fuel elements (TFE). The analysis--and the resulting MCTFE computer code (multicell thermionic fuel element)--is a steady-state finite volume model specifically designed to analyze cylindrical TFEs. It employs an interactive successive overrelaxation solution technique to solve for the temperatures throughout the TFE and a coupled thermionic routine to determine the total TFE performance. The calculated results include temperature distributions in all regions of the TFE, axial interelectrode voltages and current densities, and total TFE electrical output parameters including power, current, and voltage. MCTFE-generated results compare experimental data from the single-cell Topaz-II-type TFE and multicell data from the General Atomics 3H5 TFE to benchmark the accuracy of the code methods.

Dickinson, J.W.; Klein, A.C. [Oregon State Univ., Corvallis, OR (United States). Dept. of Nuclear Engineering

1996-05-01T23:59:59.000Z

179

Formulation and computational aspects of plasticity and damage models with application to quasi-brittle materials  

SciTech Connect

The response of underground structures and transportation facilities under various external loadings and environments is critical for human safety as well as environmental protection. Since quasi-brittle materials such as concrete and rock are commonly used for underground construction, the constitutive modeling of these engineering materials, including post-limit behaviors, is one of the most important aspects in safety assessment. From experimental, theoretical, and computational points of view, this report considers the constitutive modeling of quasi-brittle materials in general and concentrates on concrete in particular. Based on the internal variable theory of thermodynamics, the general formulations of plasticity and damage models are given to simulate two distinct modes of microstructural changes, inelastic flow and degradation of material strength and stiffness, that identify the phenomenological nonlinear behaviors of quasi-brittle materials. The computational aspects of plasticity and damage models are explored with respect to their effects on structural analyses. Specific constitutive models are then developed in a systematic manner according to the degree of completeness. A comprehensive literature survey is made to provide the up-to-date information on prediction of structural failures, which can serve as a reference for future research.

Chen, Z.; Schreyer, H.L. [New Mexico Engineering Research Institute, Albuquerque, NM (United States)

1995-09-01T23:59:59.000Z

180

Modeling of gas-solid flow in a CFB riser based on computational particle fluid dynamics  

Science Journals Connector (OSTI)

A three-dimensional model for gas-solid flow in a circulating fluidized bed (CFB) riser was developed based on computational particle ... experimental data validated the CPFD model for the CFB riser. The model pr...

Yinghui Zhang; Xingying Lan; Jinsen Gao

2012-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "including computer modeling" 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

A Polarizable QM/MM Explicit Solvent Model for Computational Electrochemistry in Water  

E-Print Network (OSTI)

We present a quantum mechanical/molecular mechanical (QM/MM) explicit solvent model for the computation of standard reduction potentials E[subscript 0]. The QM/MM model uses density functional theory (DFT) to model the ...

Wang, Lee-Ping

182

Modeling, control, and power management of a power electrical system including two distributed generators based on fuel cell and supercapacitor  

Science Journals Connector (OSTI)

This paper focuses on Distributed Generator (DG) integration in Power Electrical System (PES) for dispersed nodes. The main objective of the DG use can be classified into two aspects: a load following service and ancillary service systems. In this study the DG system contains a Fuel cell and a Supercapacitor storage device. A gas turbine system is modeled in order to estimate the PES frequency behavior under a variable power demand. The main goal of this work is to develop a DG control strategy with the aim to smooth the frequency and the voltage peak variations. To assess the different management stages the power flow exchanged between DGs and PES is depicted and discussed for different power demand variations. The results found with the DGs integration strategy confirm the frequency and voltage regulations and also prove the well power flow management.

L. Krichen

2013-01-01T23:59:59.000Z

183

TURTLE with MAD input (Trace Unlimited Rays Through Lumped Elements) -- A computer program for simulating charged particle beam transport systems and DECAY TURTLE including decay calculations  

SciTech Connect

TURTLE is a computer program useful for determining many characteristics of a particle beam once an initial design has been achieved, Charged particle beams are usually designed by adjusting various beam line parameters to obtain desired values of certain elements of a transfer or beam matrix. Such beam line parameters may describe certain magnetic fields and their gradients, lengths and shapes of magnets, spacings between magnetic elements, or the initial beam accepted into the system. For such purposes one typically employs a matrix multiplication and fitting program such as TRANSPORT. TURTLE is designed to be used after TRANSPORT. For convenience of the user, the input formats of the two programs have been made compatible. The use of TURTLE should be restricted to beams with small phase space. The lumped element approximation, described below, precludes the inclusion of the effect of conventional local geometric aberrations (due to large phase space) or fourth and higher order. A reading of the discussion below will indicate clearly the exact uses and limitations of the approach taken in TURTLE.

Carey, D.C.

1999-12-09T23:59:59.000Z

184

High-Performance Computer Modeling of the Cosmos-Iridium Collision  

SciTech Connect

This paper describes the application of a new, integrated modeling and simulation framework, encompassing the space situational awareness (SSA) enterprise, to the recent Cosmos-Iridium collision. This framework is based on a flexible, scalable architecture to enable efficient simulation of the current SSA enterprise, and to accommodate future advancements in SSA systems. In particular, the code is designed to take advantage of massively parallel, high-performance computer systems available, for example, at Lawrence Livermore National Laboratory. We will describe the application of this framework to the recent collision of the Cosmos and Iridium satellites, including (1) detailed hydrodynamic modeling of the satellite collision and resulting debris generation, (2) orbital propagation of the simulated debris and analysis of the increased risk to other satellites (3) calculation of the radar and optical signatures of the simulated debris and modeling of debris detection with space surveillance radar and optical systems (4) determination of simulated debris orbits from modeled space surveillance observations and analysis of the resulting orbital accuracy, (5) comparison of these modeling and simulation results with Space Surveillance Network observations. We will also discuss the use of this integrated modeling and simulation framework to analyze the risks and consequences of future satellite collisions and to assess strategies for mitigating or avoiding future incidents, including the addition of new sensor systems, used in conjunction with the Space Surveillance Network, for improving space situational awareness.

Olivier, S; Cook, K; Fasenfest, B; Jefferson, D; Jiang, M; Leek, J; Levatin, J; Nikolaev, S; Pertica, A; Phillion, D; Springer, K; De Vries, W

2009-08-28T23:59:59.000Z

185

Flow modeling of flat oval ductwork elbows using computational fluid dynamics  

SciTech Connect

Incompressible turbulent flow fields in heating, ventilating, and air-conditioning (HVAC) elbows were computed using an incompressible, three-dimensional computational fluid dynamics (CFD) solver implementing a {kappa}-{epsilon} turbulence model. Two different geometries were investigated, including 90-degree five-gore hard-bend and easy-bend flat oval elbows. The geometries represent a subset of many configurations analyzed in ASHRAE RP-854, Determination of Duct Fitting Resistance by Numerical Analysis. For each configuration, the zero-length pressure loss coefficient was calculated. The flow was described through contours of velocity and plots of static pressure. The Reynolds number for these flows was held constant at 100,000 based on duct diameter and mean fluid velocity.

Mahank, T.A.; Mumma, S.A. [Pennsylvania State Univ., University Park, PA (United States)

1997-12-31T23:59:59.000Z

186

Computational Mechanistic Studies of Acid-Catalyzed Lignin Model Dimers for Lignin Depolymerization  

SciTech Connect

Lignin is a heterogeneous alkyl-aromatic polymer that constitutes up to 30% of plant cell walls, and is used for water transport, structure, and defense. The highly irregular and heterogeneous structure of lignin presents a major obstacle in the development of strategies for its deconstruction and upgrading. Here we present mechanistic studies of the acid-catalyzed cleavage of lignin aryl-ether linkages, combining both experimental studies and quantum chemical calculations. Quantum mechanical calculations provide a detailed interpretation of reaction mechanisms including possible intermediates and transition states. Solvent effects on the hydrolysis reactions were incorporated through the use of a conductor-like polarizable continuum model (CPCM) and with cluster models including explicit water molecules in the first solvation shell. Reaction pathways were computed for four lignin model dimers including 2-phenoxy-phenylethanol (PPE), 1-(para-hydroxyphenyl)-2-phenoxy-ethanol (HPPE), 2-phenoxy-phenyl-1,3-propanediol (PPPD), and 1-(para-hydroxyphenyl)-2-phenoxy-1,3-propanediol (HPPPD). Lignin model dimers with a para-hydroxyphenyl ether (HPPE and HPPPD) show substantial differences in reactivity relative to the phenyl ether compound (PPE and PPPD) which have been clarified theoretically and experimentally. The significance of these results for acid deconstruction of lignin in plant cell walls will be discussed.

Kim, S.; Sturgeon, M. R.; Chmely, S. C.; Paton, R. S.; Beckham, G. T.

2013-01-01T23:59:59.000Z

187

String Tile Models for DNA Computing by SelfAssembly  

E-Print Network (OSTI)

­based computation. These suggestions were predicated on the #12; 2 complex synthetic DNA structures invented

Winfree, Erik

188

Conceptual Modelling in Error Analysis in Computer-Assisted Language Learning Systems  

E-Print Network (OSTI)

Conceptual Modelling in Error Analysis in Computer- Assisted Language Learning Systems Thierry : "Conceptual Modelling in Error Analysis in Computer Assisted Language Learning Systems". The Bridge of the learner model. We review error analysis in second language learning and tutoring systems related

Paris-Sud XI, Université de

189

Using Parallel MCMC Sampling to Calibrate a Computer Model of a Geothermal Reservoir  

E-Print Network (OSTI)

Using Parallel MCMC Sampling to Calibrate a Computer Model of a Geothermal Reservoir by T. Cui, C. 686 ISSN 1178-360 #12;Using Parallel MCMC Sampling to Calibrate a Computer Model of a Geothermal of a geothermal field to achieve model `calibration' from measured well-test data. We explore three scenarios

Fox, Colin

190

A computational model for coal transport and combustion. Final technical report  

SciTech Connect

In this project, a comprehensive theoretical, computational and experimental study directed toward providing a fundamental understanding of particulate flows as applied to coal transport is performed. Thermodynamically admissible constitutive expressions for the phasic stress tensors, heat and fluctuation energy flux vectors for turbulent multiphase flows were derived. The material parameters of the model were evaluated from the limiting conditions of rapid flows of dry spherical granular particles, and single-phase turbulent fluid flows. The case of simple shear flows of glass beads-water mixtures was studied. The model was extended to cover chemically active gas-solid flows. A thermodynamically consistent model for rapid flows of granular materials in a rotating frame of reference, along with a transport equation for the granular kinetic stress tensor was developed. The model parameters for the special case of spherical nearly elastic particles were evaluated. The results for the granular stresses and the normal stress differences were compared with the available simulation data and good agreement was observed. Effects of frictional loss of energy on rapid granular shear flows were studied. The previously developed kinetic based model was used and the mean velocity, the fluctuation kinetic energy and the solid volume fraction profiles were evaluated under a variety of conditions and different friction coefficients. A computational model for analyzing rapid granular in complex geometries was developed. The discrete element scheme was used and the granular flow down a chute was analyzed. The results were compared with the available experimental data, the model predictions, and the existing simulation results, and good agreements were observed. The model was used to analyze granular flows in a duct with an obstructing block. The effect of boundary condition was also included and the granular gravity flow was analyzed in details.

Ahmadi, G.

1995-03-01T23:59:59.000Z

191

Climate Modeling using High-Performance Computing The Center for Applied Scientific Computing (CASC) and the LLNL Climate and Carbon  

E-Print Network (OSTI)

and NCAR in the development of a comprehensive, earth systems model. This model incorporates the most-performance climate models. Through the addition of relevant physical processes, we are developing an earth systems modeling capability as well. Our collaborators in climate research include the National Center

192

Modeling Silicon Photonics in Distributed Computing Systems: From the Device to the Rack  

Science Journals Connector (OSTI)

SiP interconnects are envisioned for large scale distributed computing platforms. In such applications, optical systems involving millions of devices have to be modeled. We review key...

Rumley, Sébastien; Nikolova, Dessislava; Hendry, Robert; Wen, Ke; Bergman, Keren

193

final report for Center for Programming Models for Scalable Parallel Computing  

SciTech Connect

This is the final report of the work on parallel programming patterns that was part of the Center for Programming Models for Scalable Parallel Computing

Johnson, Ralph E

2013-04-10T23:59:59.000Z

194

A Computational Model for Pyrolysis, Heat Transfer, and Combustion in a Fixed-bed Waste Gasifier.  

E-Print Network (OSTI)

??The overarching goal of the study presented in this dissertation is to develop a predictive computational model that can describe the detailed chemical and physical… (more)

Tsai, Chung-Yin

2011-01-01T23:59:59.000Z

195

Modeling-Computer Simulations At Northern Basin & Range Region (Pritchett,  

Open Energy Info (EERE)

Modeling-Computer Simulations At Northern Basin & Range Region (Pritchett, Modeling-Computer Simulations At Northern Basin & Range Region (Pritchett, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Northern Basin & Range Region (Pritchett, 2004) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown References J. W. Pritchett (2004) Finding Hidden Geothermal Resources In The Basin And Range Using Electrical Survey Techniques- A Computational Feasibility Study Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Northern_Basin_%26_Range_Region_(Pritchett,_2004)&oldid=401423"

196

Towards a Secure and Efficient Model for Grid Computing using Mobile Code  

E-Print Network (OSTI)

for a Grid infrastructure which addresses issues such as customizable distribution of computation, securityTowards a Secure and Efficient Model for Grid Computing using Mobile Code Walter Binder 1 mentioned as an attractive technol­ ogy for distributing computations inside a Grid consisting

Di Marzo Serugendo, Giovanna

197

Bio-Inspired Computing with Resistive Memories Models, Architectures and Applications  

E-Print Network (OSTI)

Bio-Inspired Computing with Resistive Memories ­ Models, Architectures and Applications Qing Wu for applying massively parallel architecture to embedded high performance computing where we must optimize brain, the neuromorphic architecture offers a promising novel computing paradigm for compact and energy

Qiu, Qinru

198

CPT: An Energy-Efficiency Model for Multi-core Computer Systems  

E-Print Network (OSTI)

CPT: An Energy-Efficiency Model for Multi-core Computer Systems Weisong Shi, Shinan Wang and Bing efficiency of computer systems. These techniques affect the energy efficiency across different layers metric that represents the energy efficiency of a computer system, for a specific configuration, given

Shi, Weisong

199

Computer-Aided Modeling Framework for Efficient Model Development, Analysis, and Identification: Combustion and Reactor Modeling  

Science Journals Connector (OSTI)

A representative of the systems modeling languages is Modelica,(8) a standardized modeling language based on object-oriented concepts. ... Modelica Association. ... Modelica - A Unified Object-Oriented Language for Physical Systems Models. ...

Martina Heitzig; Gürkan Sin; Mauricio Sales-Cruz; Peter Glarborg; Rafiqul Gani

2010-10-22T23:59:59.000Z

200

Update of the Computing Models of the WLCG and the LHC Experiments  

E-Print Network (OSTI)

In preparation for the data collection and analysis in LHC Run 2, the LHCC and Computing Scrutiny Group of the RRB requested a detailed review of the current computing models of the LHC experiments and a consolidated plan for the future computing needs. This document represents the status of the work of the WLCG collaboration and the four LHC experiments in updating the computing models to reflect the advances in understanding of the most effective ways to use the distributed computing and storage resources, based upon the experience gained during LHC Run 1.

Bird, I; Carminati, F; Cattaneo, M; Clarke, P; Fisk, I; Girone, M; Harvey, J; Kersevan, B; Mato, P; Mount, R; Panzer-Steindel, B

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "including computer modeling" 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

Demonstration of a computer model for residual radioactive material guidelines, RESRAD  

SciTech Connect

A computer model was developed to calculate residual radioactive material guidelines for the US Department of Energy (DOE). This model, called RESRAD, can be run on IBM or IBM-compatible microcomputer. Seven potential exposure pathways from contaminated soil are analyzed, including external radiation exposure and internal radiation exposure from inhalation and food digestion. The RESRAD code has been applied to several DOE sites to derive soil cleanup guidelines. The experience gained indicates that a comprehensive set of site-specific hydrogeologic and geochemical input parameters must be used for a realistic pathway analysis. The RESRAD code is a useful tool; it is easy to run and very user-friendly. 6 refs., 12 figs.

Yu, C.; Yuan, Y.C.; Zielen, A.J.; Wallo, A. III (Argonne National Lab., IL (USA); USDOE, Washington, DC (USA))

1989-01-01T23:59:59.000Z

202

Memory consistency models for high performance distributed computing  

E-Print Network (OSTI)

This thesis develops a mathematical framework for specifying the consistency guarantees of high performance distributed shared memory multiprocessors. This framework is based on computations, which specify the operations ...

Luchangco, Victor

2001-01-01T23:59:59.000Z

203

A Calibrated Computer Model for the Thermal Simulation of Courtyard Microclimates  

E-Print Network (OSTI)

This paper describes a calibrated stand-alone courtyard microclimate model. This model is considered to be the fIrst calibrated computer program for the simulation of courtyard microclimates. In order to accomplish this a calibrated simplif...

Bagneid, A.; Haberl, J.

204

Event-Based Computer Simulation Model of Aspect-Type Experiments Strictly Satisfying Einstein's Locality Conditions  

E-Print Network (OSTI)

Event-Based Computer Simulation Model of Aspect-Type Experiments Strictly Satisfying Einstein­Podolsky­Rosen­Bohm experiments with photons, we construct an event-based simulation model in which every essential element

205

Modeling-Computer Simulations At Raft River Geothermal Area (1977) | Open  

Open Energy Info (EERE)

Raft River Geothermal Area (1977) Raft River Geothermal Area (1977) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Raft River Geothermal Area (1977) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Modeling-Computer Simulations Activity Date 1977 Usefulness not indicated DOE-funding Unknown Exploration Basis Simulate reservoir performance Notes Computer models describing both the transient reservoir pressure behavior and the time dependent temperature response of the wells were developed. A horizontal, two-dimensional, finite-difference model for calculating pressure effects was constructed to simulate reservoir performance. Vertical, two-dimensional, finite-difference, axisymmetric models for each

206

COMFAR III: Computer Model for Feasibility Analysis and Reporting | Open  

Open Energy Info (EERE)

COMFAR III: Computer Model for Feasibility Analysis and Reporting COMFAR III: Computer Model for Feasibility Analysis and Reporting Jump to: navigation, search Tool Summary Name: COMFAR III: Computer Model for Feasibility Analysis and Reporting Agency/Company /Organization: United Nations Industrial Development Organization Focus Area: Industry Resource Type: Software/modeling tools User Interface: Desktop Application Website: www.unido.org/index.php?id=o3470 Language: "Arabic, Chinese, English, French, German, Japanese, Portuguese, Russian, Spanish; Castilian" is not in the list of possible values (Abkhazian, Achinese, Acoli, Adangme, Adyghe; Adygei, Afar, Afrihili, Afrikaans, Afro-Asiatic languages, Ainu, Akan, Akkadian, Albanian, Aleut, Algonquian languages, Altaic languages, Amharic, Angika, Apache languages, Arabic, Aragonese, Arapaho, Arawak, Armenian, Aromanian; Arumanian; Macedo-Romanian, Artificial languages, Assamese, Asturian; Bable; Leonese; Asturleonese, Athapascan languages, Australian languages, Austronesian languages, Avaric, Avestan, Awadhi, Aymara, Azerbaijani, Balinese, Baltic languages, Baluchi, Bambara, Bamileke languages, Banda languages, Bantu (Other), Basa, Bashkir, Basque, Batak languages, Beja; Bedawiyet, Belarusian, Bemba, Bengali, Berber languages, Bhojpuri, Bihari languages, Bikol, Bini; Edo, Bislama, Blin; Bilin, Blissymbols; Blissymbolics; Bliss, Bosnian, Braj, Breton, Buginese, Bulgarian, Buriat, Burmese, Caddo, Catalan; Valencian, Caucasian languages, Cebuano, Celtic languages, Central American Indian languages, Central Khmer, Chagatai, Chamic languages, Chamorro, Chechen, Cherokee, Cheyenne, Chibcha, Chichewa; Chewa; Nyanja, Chinese, Chinook jargon, Chipewyan; Dene Suline, Choctaw, Chuukese, Chuvash, Classical Newari; Old Newari; Classical Nepal Bhasa, Classical Syriac, Coptic, Cornish, Corsican, Cree, Creek, Creoles and pidgins , Crimean Tatar; Crimean Turkish, Croatian, Cushitic languages, Czech, Dakota, Danish, Dargwa, Delaware, Dinka, Divehi; Dhivehi; Maldivian, Dogri, Dogrib, Dravidian languages, Duala, Dutch; Flemish, Dyula, Dzongkha, Eastern Frisian, Efik, Egyptian (Ancient), Ekajuk, Elamite, English, Erzya, Esperanto, Estonian, Ewe, Ewondo, Fang, Fanti, Faroese, Fijian, Filipino; Pilipino, Finnish, Finno-Ugrian languages, Fon, French, Friulian, Fulah, Ga, Gaelic; Scottish Gaelic, Galibi Carib, Galician, Ganda, Gayo, Gbaya, Geez, Georgian, German, Germanic languages, Gilbertese, Gondi, Gorontalo, Gothic, Grebo, Greek, Modern, Guarani, Gujarati, Gwich'in, Haida, Haitian; Haitian Creole, Hausa, Hawaiian, Hebrew, Herero, Hiligaynon, Himachali languages; Western Pahari languages, Hindi, Hiri Motu, Hittite, Hmong; Mong, Hungarian, Hupa, Iban, Icelandic, Ido, Igbo, Ijo languages, Iloko, Inari Sami, Indic languages, Indo-European languages, Indonesian, Ingush, Interlingue; Occidental, Inuktitut, Inupiaq, Iranian languages, Irish, Iroquoian languages, Italian, Japanese, Javanese, Judeo-Arabic, Judeo-Persian, Kabardian, Kabyle, Kachin; Jingpho, Kalaallisut; Greenlandic, Kalmyk; Oirat, Kamba, Kannada, Kanuri, Kara-Kalpak, Karachay-Balkar, Karelian, Karen languages, Kashmiri, Kashubian, Kawi, Kazakh, Khasi, Khoisan languages, Khotanese; Sakan, Kikuyu; Gikuyu, Kimbundu, Kinyarwanda, Kirghiz; Kyrgyz, Klingon; tlhIngan-Hol, Komi, Kongo, Konkani, Korean, Kosraean, Kpelle, Kru languages, Kuanyama; Kwanyama, Kumyk, Kurdish, Kurukh, Kutenai, Ladino, Lahnda, Lamba, Land Dayak languages, Lao, Latin, Latvian, Lezghian, Limburgan; Limburger; Limburgish, Lingala, Lithuanian, Lojban, Lower Sorbian, Lozi, Luba-Katanga, Luba-Lulua, Luiseno, Lule Sami, Lunda, Luo (Kenya and Tanzania), Lushai, Luxembourgish; Letzeburgesch, Macedonian, Madurese, Magahi, Maithili, Makasar, Malagasy, Malay, Malayalam, Maltese, Manchu, Mandar, Mandingo, Manipuri, Manobo languages, Manx, Maori, Mapudungun; Mapuche, Marathi, Mari, Marshallese, Marwari, Masai, Mayan languages, Mende, Mi'kmaq; Micmac, Minangkabau, Mirandese, Mohawk, Moksha, Mon-Khmer languages, Mongo, Mongolian, Mossi, Multiple languages, Munda languages, N'Ko, Nahuatl languages, Nauru, Navajo; Navaho, Ndebele, North; North Ndebele, Ndebele, South; South Ndebele, Ndonga, Neapolitan, Nepal Bhasa; Newari, Nepali, Nias, Niger-Kordofanian languages, Nilo-Saharan languages, Niuean, North American Indian languages, Northern Frisian, Northern Sami, Norwegian, Nubian languages, Nyamwezi, Nyankole, Nyoro, Nzima, Occitan (post 1500); Provençal, Ojibwa, Oriya, Oromo, Osage, Ossetian; Ossetic, Otomian languages, Pahlavi, Palauan, Pali, Pampanga; Kapampangan, Pangasinan, Panjabi; Punjabi, Papiamento, Papuan languages, Pedi; Sepedi; Northern Sotho, Persian, Philippine languages, Phoenician, Pohnpeian, Polish, Portuguese, Prakrit languages, Pushto; Pashto, Quechua, Rajasthani, Rapanui, Rarotongan; Cook Islands Maori, Romance languages, Romanian; Moldavian; Moldovan, Romansh, Romany, Rundi, Russian, Salishan languages, Samaritan Aramaic, Sami languages, Samoan, Sandawe, Sango, Sanskrit, Santali, Sardinian, Sasak, Scots, Selkup, Semitic languages, Serbian, Serer, Shan, Shona, Sichuan Yi; Nuosu, Sicilian, Sidamo, Sign Languages, Siksika, Sindhi, Sinhala; Sinhalese, Sino-Tibetan languages, Siouan languages, Skolt Sami, Slave (Athapascan), Slavic languages, Slovak, Slovenian, Sogdian, Somali, Songhai languages, Soninke, Sorbian languages, Sotho, Southern, South American Indian (Other), Southern Altai, Southern Sami, Spanish; Castilian, Sranan Tongo, Sukuma, Sumerian, Sundanese, Susu, Swahili, Swati, Swedish, Swiss German; Alemannic; Alsatian, Syriac, Tagalog, Tahitian, Tai languages, Tajik, Tamashek, Tamil, Tatar, Telugu, Tereno, Tetum, Thai, Tibetan, Tigre, Tigrinya, Timne, Tiv, Tlingit, Tok Pisin, Tokelau, Tonga (Nyasa), Tonga (Tonga Islands), Tsimshian, Tsonga, Tswana, Tumbuka, Tupi languages, Turkish, Turkmen, Tuvalu, Tuvinian, Twi, Udmurt, Ugaritic, Uighur; Uyghur, Ukrainian, Umbundu, Uncoded languages, Undetermined, Upper Sorbian, Urdu, Uzbek, Vai, Venda, Vietnamese, Volapük, Votic, Wakashan languages, Walamo, Walloon, Waray, Washo, Welsh, Western Frisian, Wolof, Xhosa, Yakut, Yao, Yapese, Yiddish, Yoruba, Yupik languages, Zande languages, Zapotec, Zaza; Dimili; Dimli; Kirdki; Kirmanjki; Zazaki, Zenaga, Zhuang; Chuang, Zulu, Zuni) for this property.

207

DEVELOPMENT OF AN INTERACTIVE COMPUTER SIMULATION MODEL FOR DESIGNING  

E-Print Network (OSTI)

, Louisiana September 2005 #12;ii ABSTRACT Application of computer science in the analysis of industrial data of Forestry, Michigan State University, for his cooperative work in this field, and Shivakumar K. Srinivasamurthy for helping develop the computer code. #12;iv Table of Contents Abstract

208

A Hierarchical Task Model for Dispatching in Computer-Assisted Demand-Responsive Paratransit Operation  

E-Print Network (OSTI)

A Hierarchical Task Model for Dispatching in Computer- Assisted Demand-Responsive Paratransit Model for Dispatching in Computer-Assisted Demand-Responsive Paratransit Operation ABSTRACT, Dispatch Training #12;1 INTRODUCTION Demand-responsive paratransit service is on the rise. For example

Dessouky, Maged

209

Metaprogrammable Toolkit for Model-Integrated Computing Akos Ledeczi, Miklos Maroti, Gabor Karsai and Greg Nordstrom  

E-Print Network (OSTI)

building, constraint management, and automatic program synthesis components, are well suited for the design. Model-Integrated Computing (MIC) is well suited for the rapid design and implementation of such systemsMetaprogrammable Toolkit for Model-Integrated Computing Akos Ledeczi, Miklos Maroti, Gabor Karsai

Maróti, Miklós

210

Computational Modeling of Ballast Tanks to Improve Understanding and Maximize Effectiveness of Management Practices and Treatment  

E-Print Network (OSTI)

Computational Modeling of Ballast Tanks to Improve Understanding and Maximize Effectiveness tanks exchange coastal ballast water with mid-ocean seawater (referred to as "ballast water exchange of high-resolution computational fluid dynamics (CFD) to model ballast tank water flow and to predict EE

211

Bayesian model-based approaches with MCMC computation to some bioinformatics problems  

E-Print Network (OSTI)

BAYESIAN MODEL-BASED APPROACHES WITH MCMC COMPUTATION TO SOME BIOINFORMATICS PROBLEMS A Dissertation by KYOUNGHWA BAE Submitted to the O?ce of Graduate Studies of Texas A&M University in partial ful?llment of the requirements for the degree....3 Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 3.4 Computation . . . . . . . . . . . . . . . . . . . . . . . . . 49 3.5 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 3.6 Discussion...

Bae, Kyounghwa

2005-08-29T23:59:59.000Z

212

Medical Nuclear Supply Chain Design: A Tractable Network Model and Computational  

E-Print Network (OSTI)

Medical Nuclear Supply Chain Design: A Tractable Network Model and Computational Approach Anna Chain Challenges The Medical Nuclear Supply Chain Network Design Model The Computational Approach Medical Nuclear Supply Chain Design #12;This presentation is based on the paper, "Medical Nuclear Supply

Nagurney, Anna

213

Comprehensive computational model of single-and dual-loop optoelectronic  

E-Print Network (OSTI)

Comprehensive computational model of single- and dual-loop optoelectronic oscillators describe a comprehensive computational model for single- loop and dual-loop optoelectronic oscillators amplifiers and oscillators; (230.0250) Optoelectronics; (230.4910) Oscillators. References and links 1. X. S

Horowitz, Moshe

214

Computer aided modeling and simulation of complex physical systems, using components from multiple  

E-Print Network (OSTI)

of Equation-Based Object-Oriented Modeling Languages Department of Computer and Information Science, Linköping. References [1] Modelica Association. Modelica - A Unified Object-Oriented Language for Physical Systems§ Background Computer aided modeling and simulation of complex physical systems, using components

Zhao, Yuxiao

215

Modeling-Computer Simulations At Northern Basin & Range Region (Biasi, Et  

Open Energy Info (EERE)

Modeling-Computer Simulations At Northern Basin & Range Region (Biasi, Et Modeling-Computer Simulations At Northern Basin & Range Region (Biasi, Et Al., 2009) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Northern Basin & Range Region (Biasi, Et Al., 2009) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful regional reconnaissance DOE-funding Unknown References Glenn Biasi, Leiph Preston, Ileana Tibuleac (2009) Body Wave Tomography For Regional Scale Assessment Of Geothermal Indicators In The Western Great Basin Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Northern_Basin_%26_Range_Region_(Biasi,_Et_Al.,_2009)&oldid=40142

216

Hyperspectral Aquatic Radiative Transfer Modeling Using a High-Performance Cluster Computing-Based Approach  

SciTech Connect

Abstract For aquatic studies, radiative transfer (RT) modeling can be used to compute hyperspectral above-surface remote sensing reflectance that can be utilized for inverse model development. Inverse models can provide bathymetry and inherent-and bottom-optical property estimation. Because measured oceanic field/organic datasets are often spatio-temporally sparse, synthetic data generation is useful in yielding sufficiently large datasets for inversion model development; however, these forward-modeled data are computationally expensive and time-consuming to generate. This study establishes the magnitude of wall-clock-time savings achieved for performing large, aquatic RT batch-runs using parallel computing versus a sequential approach. Given 2,600 simulations and identical compute-node characteristics, sequential architecture required ~100 hours until termination, whereas a parallel approach required only ~2.5 hours (42 compute nodes) a 40x speed-up. Tools developed for this parallel execution are discussed.

Filippi, Anthony M [ORNL; Bhaduri, Budhendra L [ORNL; Naughton, III, Thomas J [ORNL; King, Amy L [ORNL; Scott, Stephen L [ORNL; Guneralp, Inci [Texas A& M University

2012-01-01T23:59:59.000Z

217

Hyperspectral Aquatic Radiative Transfer Modeling Using a High-Performance Cluster Computing Based Approach  

SciTech Connect

For aquatic studies, radiative transfer (RT) modeling can be used to compute hyperspectral above-surface remote sensing reflectance that can be utilized for inverse model development. Inverse models can provide bathymetry and inherent- and bottom-optical property estimation. Because measured oceanic field/organic datasets are often spatio-temporally sparse, synthetic data generation is useful in yielding sufficiently large datasets for inversion model development; however, these forward-modeled data are computationally expensive and time-consuming to generate. This study establishes the magnitude of wall-clock-time savings achieved for performing large, aquatic RT batch-runs using parallel computing versus a sequential approach. Given 2,600 simulations and identical compute-node characteristics, sequential architecture required {approx}100 hours until termination, whereas a parallel approach required only {approx}2.5 hours (42 compute nodes) - a 40x speed-up. Tools developed for this parallel execution are discussed.

Fillippi, Anthony [Texas A& M University; Bhaduri, Budhendra L [ORNL; Naughton, III, Thomas J [ORNL; King, Amy L [ORNL; Scott, Stephen L [ORNL; Guneralp, Inci [Texas A& M University

2012-01-01T23:59:59.000Z

218

Computing  

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

Computing Computing and Storage Requirements Computing and Storage Requirements for FES J. Candy General Atomics, San Diego, CA Presented at DOE Technical Program Review Hilton Washington DC/Rockville Rockville, MD 19-20 March 2013 2 Computing and Storage Requirements Drift waves and tokamak plasma turbulence Role in the context of fusion research * Plasma performance: In tokamak plasmas, performance is limited by turbulent radial transport of both energy and particles. * Gradient-driven: This turbulent transport is caused by drift-wave instabilities, driven by free energy in plasma temperature and density gradients. * Unavoidable: These instabilities will persist in a reactor. * Various types (asymptotic theory): ITG, TIM, TEM, ETG . . . + Electromagnetic variants (AITG, etc). 3 Computing and Storage Requirements Fokker-Planck Theory of Plasma Transport Basic equation still

219

Improvements in fast-response flood modeling: desktop parallel computing and domain tracking  

SciTech Connect

It is becoming increasingly important to have the ability to accurately forecast flooding, as flooding accounts for the most losses due to natural disasters in the world and the United States. Flood inundation modeling has been dominated by one-dimensional approaches. These models are computationally efficient and are considered by many engineers to produce reasonably accurate water surface profiles. However, because the profiles estimated in these models must be superimposed on digital elevation data to create a two-dimensional map, the result may be sensitive to the ability of the elevation data to capture relevant features (e.g. dikes/levees, roads, walls, etc...). Moreover, one-dimensional models do not explicitly represent the complex flow processes present in floodplains and urban environments and because two-dimensional models based on the shallow water equations have significantly greater ability to determine flow velocity and direction, the National Research Council (NRC) has recommended that two-dimensional models be used over one-dimensional models for flood inundation studies. This paper has shown that two-dimensional flood modeling computational time can be greatly reduced through the use of Java multithreading on multi-core computers which effectively provides a means for parallel computing on a desktop computer. In addition, this paper has shown that when desktop parallel computing is coupled with a domain tracking algorithm, significant computation time can be eliminated when computations are completed only on inundated cells. The drastic reduction in computational time shown here enhances the ability of two-dimensional flood inundation models to be used as a near-real time flood forecasting tool, engineering, design tool, or planning tool. Perhaps even of greater significance, the reduction in computation time makes the incorporation of risk and uncertainty/ensemble forecasting more feasible for flood inundation modeling (NRC 2000; Sayers et al. 2000).

Judi, David R [Los Alamos National Laboratory; Mcpherson, Timothy N [Los Alamos National Laboratory; Burian, Steven J [UNIV. OF UTAH

2009-01-01T23:59:59.000Z

220

Cloud in the operational DWD mesoscale model An extensive documentation of the physics included in the Lokal Modell (LM) can be found  

E-Print Network (OSTI)

in the Lokal Modell (LM) can be found in Doms et al. (2004). Here a short summary of the cloud physics is given-scale clouds Since 26th of April 2004 the Lokal Modell (LM) uses a two-category ice scheme which explicitly S that are considered in this two-category ice scheme of LM. The individual microphysical processes are: Sc condensation

Reading, University of

Note: This page contains sample records for the topic "including computer modeling" 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

Modeling-Computer Simulations At Stillwater Area (Wisian & Blackwell, 2004)  

Open Energy Info (EERE)

Stillwater Area (Wisian & Blackwell, 2004) Stillwater Area (Wisian & Blackwell, 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Stillwater Area (Wisian & Blackwell, 2004) Exploration Activity Details Location Stillwater Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown References Kenneth W. Wisian, David D. Blackwell (2004) Numerical Modeling Of Basin And Range Geothermal Systems Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Stillwater_Area_(Wisian_%26_Blackwell,_2004)&oldid=387304" Categories: Exploration Activities DOE Funded Activities What links here Related changes Special pages Printable version

222

Cloud computing adoption model for governments and large enterprises  

E-Print Network (OSTI)

Cloud Computing has held organizations across the globe spell bound with its promise. As it moves from being a buzz word and hype into adoption, organizations are faced with question of how to best adopt cloud. Existing ...

Trivedi, Hrishikesh

2013-01-01T23:59:59.000Z

223

Computational modelling of biological systems: tools and visions  

Science Journals Connector (OSTI)

...intelligent, with their on-board computing power, they can be designed to mimic the way...in anisotropic twisted myocardium. J. Car- diovasc. Electrophysiol. 4, 412...preferably with his growing family, and enjoys water sports and landscape photography. His...

2000-01-01T23:59:59.000Z

224

CSP Based E-Learning Model in Cloud Computing Environment  

Science Journals Connector (OSTI)

Cloud computing technology is widely used for system service, web service, e-learning system and all kinds of software to services using the internet. In this paper, we propose e-learning system in cloud computin...

HwaYoung Jeong; BongHwa Hong

2012-01-01T23:59:59.000Z

225

Sound-insulation layer modelling in car computational vibroacoustics in the medium-frequency range  

E-Print Network (OSTI)

Sound-insulation layer modelling in car computational vibroacoustics in the medium-frequency range In a previous article, a simplified low- and medium-frequency model for un- certain automotive sound-insulation. In this paper, the insulation simplified model is implemented in an in- dustrial stochastic vibroacoustic model

Boyer, Edmond

226

Validating an `ns' Simulation Model of the DOCSIS Protocol Department of Computer Science  

E-Print Network (OSTI)

Validating an `ns' Simulation Model of the DOCSIS Protocol Jim Martin Department of Computer Over Cable System Interface Specification (DOCSIS). We have implemented a simulation model analytic and live network evidence that the simulation model is correct. To demonstrate the model, we

Westall, James M.

227

COMPUTATIONAL FLUID DYNAMICS MODELING OF SCALED HANFORD DOUBLE SHELL TANK MIXING - CFD MODELING SENSITIVITY STUDY RESULTS  

SciTech Connect

The primary purpose of the tank mixing and sampling demonstration program is to mitigate the technical risks associated with the ability of the Hanford tank farm delivery and celtification systems to measure and deliver a uniformly mixed high-level waste (HLW) feed to the Waste Treatment and Immobilization Plant (WTP) Uniform feed to the WTP is a requirement of 24590-WTP-ICD-MG-01-019, ICD-19 - Interface Control Document for Waste Feed, although the exact definition of uniform is evolving in this context. Computational Fluid Dynamics (CFD) modeling has been used to assist in evaluating scaleup issues, study operational parameters, and predict mixing performance at full-scale.

JACKSON VL

2011-08-31T23:59:59.000Z

228

Modeling-Computer Simulations At Chocolate Mountains Area (Alm, Et Al.,  

Open Energy Info (EERE)

Modeling-Computer Simulations At Chocolate Mountains Area (Alm, Et Al., Modeling-Computer Simulations At Chocolate Mountains Area (Alm, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Chocolate Mountains Area (Alm, Et Al., 2010) Exploration Activity Details Location Chocolate Mountains Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes "Shallow temperature gradient drilling began at the CMAGR in January of 2010. 13 temperature gradient holes were completed to a depth of 500' below ground surface. Sites were selected based on the compilation of previous exploration and resulting data is being integrated into the most recent geologic model. This model will form the basis for the selection of a

229

Modeling-Computer Simulations At Akutan Fumaroles Area (Kolker, Et Al.,  

Open Energy Info (EERE)

Modeling-Computer Simulations At Akutan Fumaroles Area (Kolker, Et Al., Modeling-Computer Simulations At Akutan Fumaroles Area (Kolker, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Akutan Fumaroles Area (Kolker, Et Al., 2010) Exploration Activity Details Location Akutan Fumaroles Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes "Conceptual Model: Based on conceptual models built primarily from MT and geochemical datasets, it appears that development of the Akutan geothermal resource for power and/or direct use may be feasible. These datasets point to a shallow, tabular aquifer(s) of 155-180degrees C (i.e., "outflow zone") and a deeper, hotter resource of >220degrees C (i.e., "upflow zone") that

230

Modeling-Computer Simulations At Raft River Geothermal Area (1983) | Open  

Open Energy Info (EERE)

Modeling-Computer Simulations At Raft River Geothermal Area (1983) Modeling-Computer Simulations At Raft River Geothermal Area (1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Raft River Geothermal Area (1983) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Modeling-Computer Simulations Activity Date 1983 Usefulness useful DOE-funding Unknown Exploration Basis Predict flow rate and porosity Notes The objectives of the physical modeling effort are to: (1) evaluate injection-backflow testing for fractured reservoirs under conditions of known reservoir parameters (porosity, fracture width, etc.); (2) study the mechanisms controlling solute transport in fracture systems; and (3) provide data for validation of numerical models that explicitly simulate

231

Modeling-Computer Simulations At San Juan Volcanic Field Area (Clarkson &  

Open Energy Info (EERE)

Modeling-Computer Simulations At San Juan Volcanic Field Area (Clarkson & Modeling-Computer Simulations At San Juan Volcanic Field Area (Clarkson & Reiter, 1987) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At San Juan Volcanic Field Area (Clarkson & Reiter, 1987) Exploration Activity Details Location San Juan Volcanic Field Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes In this study we combine thermal maturation models, based on the level of maturation of the Fruitland Formation coals, and time-dependet temperature models, based on heat-flow data in the San Juan region, to further investigate both the thermal history of the region and the nature of the influence of the San Juan volcanic field thermal source on the thermal

232

Interstellar Simulations Using A Unified Microscopic-Macroscopic Monte Carlo Model with a full Gas-Grain Network including Bulk Diffusion in Ice Mantles  

E-Print Network (OSTI)

We have designed an improved algorithm that enables us to simulate the chemistry of cold dense interstellar clouds with a full gas-grain reaction network. The chemistry is treated by a unified microscopic-macroscopic Monte Carlo approach that includes photon penetration and bulk diffusion. To determine the significance of these two processes, we simulate the chemistry with three different models. In Model 1, we use an exponential treatment to follow how photons penetrate and photodissociate ice species throughout the grain mantle. Moreover, the products of photodissociation are allowed to diffuse via bulk diffusion and react within the ice mantle. Model 2 is similar to Model 1 but with a slower bulk diffusion rate. A reference Model 0, which only allows photodissociation reactions to occur on the top two layers, is also simulated. Photodesorption is assumed to occur from the top two layers in all three models. We found that the abundances of major stable species in grain mantles do not differ much among these...

Chang, Qiang

2014-01-01T23:59:59.000Z

233

Close electric fields and lightning-induced voltages predicted by a return-stroke model including corona and nonlinear channel resistance  

Science Journals Connector (OSTI)

Abstract In this paper, a return-stroke model based on nonuniform transmission line theory that includes nonlinear losses and corona is used for calculating close electric fields and lightning-induced voltages on an overhead line. A study is performed to identify the influence of return-stroke corona on close electric fields and line overvoltages considering different model assumptions. It is shown that the consideration of corona affects the attenuation and distortion of the return-stroke current. Close vertical electric fields predicted by the model present waveforms, peak values, and decay with distance that are in agreement with measured data. A simpler case in which the return-stroke speed is artificially set to a prescribed value by controlling the inductance and capacitance of the channel is shown to lead to results that are in agreement with the complete return-stroke model considering nonlinear losses and corona. Similar conclusions apply to popular engineering return-stroke models typically used in lightning-induced voltage calculations provided the return-stroke speed is suitably adjusted. It is also shown that lightning-induced voltages calculated with the considered model are in good agreement with experimental data.

Alberto De Conti; Fernando H. Silveira; Silvério Visacro

2014-01-01T23:59:59.000Z

234

Dynamically dimensioned search algorithm for computationally efficient watershed model calibration  

E-Print Network (OSTI)

search (DDS), is introduced for automatic calibration of watershed simulation models. DDS is designed. Introduction [2] Almost all watershed simulation models contain effective physical and/or conceptual model. This study will focus on the automatic calibration of watershed simulation models. The results of this study

Hutter, Frank

235

RISG-M-2482 COMPUTER MODELLING OF RADIOACTIVE SOURCE TERMS  

E-Print Network (OSTI)

/INTOR workshops. INIS descriptors: M CODES; MATHEMATICAL MODELS; MONTE CARLO METHOD; NEUTRON TRANSPORT; TOKAMAK

236

Electrostatic Modeling of CMOS sensor array 1 Computing Security  

E-Print Network (OSTI)

to Hades. #12;Electrostatic Modeling of CMOS sensor array 3 7 Kerberos Tickets Used for authentication

Cukic, Bojan

237

Computer Modeling VRF Heat Pumps in Commercial Buildings using EnergyPlus  

SciTech Connect

Variable Refrigerant Flow (VRF) heat pumps are increasingly used in commercial buildings in the United States. Monitored energy use of field installations have shown, in some cases, savings exceeding 30% compared to conventional heating, ventilating, and air-conditioning (HVAC) systems. A simulation study was conducted to identify the installation or operational characteristics that lead to energy savings for VRF systems. The study used the Department of Energy EnergyPlus? building simulation software and four reference building models. Computer simulations were performed in eight U.S. climate zones. The baseline reference HVAC system incorporated packaged single-zone direct-expansion cooling with gas heating (PSZ-AC) or variable-air-volume systems (VAV with reheat). An alternate baseline HVAC system using a heat pump (PSZ-HP) was included for some buildings to directly compare gas and electric heating results. These baseline systems were compared to a VRF heat pump model to identify differences in energy use. VRF systems combine multiple indoor units with one or more outdoor unit(s). These systems move refrigerant between the outdoor and indoor units which eliminates the need for duct work in most cases. Since many applications install duct work in unconditioned spaces, this leads to installation differences between VRF systems and conventional HVAC systems. To characterize installation differences, a duct heat gain model was included to identify the energy impacts of installing ducts in unconditioned spaces. The configuration of variable refrigerant flow heat pumps will ultimately eliminate or significantly reduce energy use due to duct heat transfer. Fan energy is also studied to identify savings associated with non-ducted VRF terminal units. VRF systems incorporate a variable-speed compressor which may lead to operational differences compared to single-speed compression systems. To characterize operational differences, the computer model performance curves used to simulate cooling operation are also evaluated. The information in this paper is intended to provide a relative difference in system energy use and compare various installation practices that can impact performance. Comparative results of VRF versus conventional HVAC systems include energy use differences due to duct location, differences in fan energy when ducts are eliminated, and differences associated with electric versus fossil fuel type heating systems.

Raustad, Richard

2013-06-01T23:59:59.000Z

238

Modeling-Computer Simulations At Coso Geothermal Area (1980) | Open Energy  

Open Energy Info (EERE)

Modeling-Computer Simulations At Coso Geothermal Area (1980) Modeling-Computer Simulations At Coso Geothermal Area (1980) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Coso Geothermal Area (1980) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Modeling-Computer Simulations Activity Date 1980 Usefulness useful DOE-funding Unknown Exploration Basis Estimate thermal regime and potential of the system Notes A three-dimensional generalized linear inversion of the delta t* observations was performed using a three-layer model. A shallow zone of high attenuation exists within the upper 5 km in a region bounded by Coso Hot Springs, Devils Kitchen, and Sugarloaf Mountain probably corresponding to a shallow vapor liquid mixture or "lossy" near surface lithology.

239

Modeling-Computer Simulations At Coso Geothermal Area (2000) | Open Energy  

Open Energy Info (EERE)

Modeling-Computer Simulations At Coso Geothermal Area (2000) Modeling-Computer Simulations At Coso Geothermal Area (2000) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Coso Geothermal Area (2000) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Modeling-Computer Simulations Activity Date 2000 Usefulness not indicated DOE-funding Unknown Exploration Basis Model ground subsidence using observations of satellite radar interferometry Notes The InSAR displacement data was inverted for the positions, geometry, and relative strengths of the deformation sources at depth using a nonlinear least squares minimization algorithm. Elastic solutions were used for a prolate uniformly pressurized spheroidal cavity in a semi-infinite body as

240

Modeling-Computer Simulations At Fish Lake Valley Area (Deymonaz, Et Al.,  

Open Energy Info (EERE)

Modeling-Computer Simulations At Fish Lake Valley Area (Deymonaz, Et Al., Modeling-Computer Simulations At Fish Lake Valley Area (Deymonaz, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Fish Lake Valley Area (Deymonaz, Et Al., 2008) Exploration Activity Details Location Fish Lake Valley Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes (4) synthesis of geologic mapping results and lithologic logs for 3_D geologic characterization of the prospect area; (5) compilation of relevant data from the foregoing sub_activities into a Geographic Information Systems (GIS) database for visualization and mapping, and to facilitate the development of an exploration model; and (6) development of a refined

Note: This page contains sample records for the topic "including computer modeling" 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

Modeling-Computer Simulations At Hawthorne Area (Lazaro, Et Al., 2010) |  

Open Energy Info (EERE)

Modeling-Computer Simulations At Hawthorne Area (Lazaro, Et Al., 2010) Modeling-Computer Simulations At Hawthorne Area (Lazaro, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Hawthorne Area (Lazaro, Et Al., 2010) Exploration Activity Details Location Hawthorne Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown Notes The Navy GPO has contracted the University of Nevada Reno Great Basin for Center for Geothermal Research to conduct additional field exploration at HAD. The tasks required by the Navy range from field mapping and water sampling; detailed mapping, to low angle sun photo interpretations, trenching, to 3-D seismic interpretations and modeling. References Michael Lazaro, Chris Page, Andy Tiedeman, Andrew Sabin, Steve

242

Modeling-Computer Simulations At Nw Basin & Range Region (Biasi, Et Al.,  

Open Energy Info (EERE)

Biasi, Et Al., Biasi, Et Al., 2009) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Nw Basin & Range Region (Biasi, Et Al., 2009) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful regional reconnaissance DOE-funding Unknown References Glenn Biasi, Leiph Preston, Ileana Tibuleac (2009) Body Wave Tomography For Regional Scale Assessment Of Geothermal Indicators In The Western Great Basin Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Nw_Basin_%26_Range_Region_(Biasi,_Et_Al.,_2009)&oldid=401461" Categories: Exploration Activities DOE Funded

243

Efficient thermal field computation in phase-field models  

Science Journals Connector (OSTI)

We solve the phase-field equations in two dimensions to simulate crystal growth in the low undercooling regime. The novelty is the use of a fast solver for the free space heat equation to compute the thermal field. This solver is based on the efficient ... Keywords: Crystal growth, Dendritic solidification, Diffusion equation, Fast solvers, Integral representation, Phase-field, Unbounded domain

Jing-Rebecca Li; Donna Calhoun; Lucien Brush

2009-12-01T23:59:59.000Z

244

Computer Modeling Implicates Stem Cell Overproduction in Colon Cancer Initiation  

Science Journals Connector (OSTI)

...MGLD and MRLD; MRVol was calculated by computer using SER thresholds. Pathologic residual...This work is funded by NIH/ACRIN Grant U01 CA79778S2, CALGB Grants CA31946 and CA33601, and NCI SPORE Grant CA58207. Citation Information: Cancer...

Bruce M. Boman; Jeremy Z. Fields; Oliver Bonham-Carter; and Olaf A. Runquist

2001-12-01T23:59:59.000Z

245

Computational models for the discovery of the world's music  

E-Print Network (OSTI)

://compmusic.upf.edu #12;compmusic MTG-Universitat Pompeu Fabra ·Engineering disciplines: · Signal processing · Machine learning · Human computer interaction ·Research topics: · Audio signal processing · Sound and music;compmusic CompMusic tasks ·Knowledge-based signal processing approaches. ·Intonation, melody, rhythm

Verschure, Paul

246

Computer Models Aim to Keep Ahead of Snowslides  

Science Journals Connector (OSTI)

...Institute of Snow and Avalanche Research (SLF). He and his colleagues had used a computer...Switzerland alone—is a watershed. Although SLF's researchers have made great strides...acknowledge the preeminent position of the SLF, however. Robert L. Brown of Montana...

Robert Koenig

1999-04-09T23:59:59.000Z

247

Modelling Photochemical Pollution using Parallel and Distributed Computing Platforms  

E-Print Network (OSTI)

of photochemical air pollution (smog) in industrialised cities. However, computational hardware demands can that have been used as part of an air pollution study being conducted in Melbourne, Australia. We also necessary to perform real air pollution studies. The system is used as part of the Melbourne Airshed study

Abramson, David

248

A.24 ENHANCING THE CAPABILITY OF COMPUTATIONAL EARTH SYSTEM MODELS AND NASA DATA FOR OPERATION AND ASSESSMENT  

E-Print Network (OSTI)

A.24-1 A.24 ENHANCING THE CAPABILITY OF COMPUTATIONAL EARTH SYSTEM MODELS AND NASA DATA) computational support of Earth system modeling. #12;A.24-2 2.1 Acceleration of Operational Use of Research Data

249

Yuening Hu, Jordan Boyd-Graber, and Brianna Satinoff. Interactive Topic Modeling. Association for Computational Linguistics, 2011.  

E-Print Network (OSTI)

Yuening Hu, Jordan Boyd-Graber, and Brianna Satinoff. Interactive Topic Modeling. Association for Computational Linguistics, 2011. @inproceedings{Hu:Boyd-Graber:Satinoff-2011, Title = {Interactive Topic Modeling}, Booktitle = {Association for Computational Linguistics}, Author = {Yuening Hu and Jordan Boyd

Boyd-Graber, Jordan

250

A self-consistent global model of solenoidal-type inductively coupled plasma discharges including the effects of radio-frequency bias power  

SciTech Connect

We developed a self-consistent global simulator of solenoidal-type inductively coupled plasma discharges and observed the effect of the radio-frequency (rf) bias power on the plasma density and the electron temperature. We numerically solved a set of spatially averaged fluid equations for charged particles, neutrals, and radicals. Absorbed power by electrons is determined by using an analytic electron heating model including the anomalous skin effect. To analyze the effects of rf bias power on the plasma properties, our model also combines the electron heating and global transport modules with an rf sheath module in a self-consistent manner. The simulation results are compared with numerical results by using the commercial software package cfd-ace + (ESI group) and experimental measurements by using a wave cutoff probe and a single Langmuir probe.

Kwon, D. C.; Chang, W. S.; Song, M. Y.; Yoon, J.-S. [Convergence Plasma Research Center, National Fusion Research Institute, Daejeon 305-333 (Korea, Republic of); Park, M. [Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701 (Korea, Republic of); You, D. H. [Kyoungwon Tech, Inc., Seongnam 462-806 (Korea, Republic of); You, S. J. [Center for Vacuum Technology, Korea Research Institute of Standard and Science, Daejeon 305-340 (Korea, Republic of); Im, Y. H. [Division of Chemical Engineering, Chonbuk National University, Jeonju 561-756 (Korea, Republic of)

2011-04-01T23:59:59.000Z

251

A regularized spectral algorithm for Hidden Markov Models with applications in computer vision  

E-Print Network (OSTI)

A regularized spectral algorithm for Hidden Markov Models with applications in computer vision H a regularized algorithm for learning HMMs in the spectral framework, whose computations have no local minima. Compared with recently proposed spectral algorithms for HMMs, our method is guaranteed to produce

Minh, Ha Quang

252

Towards optimal allocation of computer resources: Trade-offs between uncertainty quantification, discretization and model reduction  

Science Journals Connector (OSTI)

The computational complexity of numerical models can be broken down into contributions ranging from spatial, temporal and stochastic resolution, e.g., spatial grid resolution, time step size and number of repeated simulations dedicated to quantify uncertainty. ... Keywords: Computational costs, Optimal design, Stochastic hydrology, Uncertainty quantification

Philipp C. Leube; Felipe P. J. De Barros; Wolfgang Nowak; Ram Rajagopal

2013-12-01T23:59:59.000Z

253

CDA6530: Performance Models of Computers and Networks Chapter 4: Using Matlab for Performance  

E-Print Network (OSTI)

CDA6530: Performance Models of Computers and Networks Chapter 4: Using Matlab for Performance Interpreted language, easy to learn Use it to facilitate our simulation projects A good tool to plot .eps for Latex #12;3 Introduction MatLab : Matrix Laboratory Numerical Computations with matrices

Zou, Cliff C.

254

A Computational Market Model for Distributed Configuration Design Michael P. Wellman  

E-Print Network (OSTI)

of distributed configuration design problems. Given a design problem, the model defines a computational economy viewpoint for analyzing distributed design problems. #12;This page intentionally blank #12. Computational support for distributed design collaboration presents a variety of new challenges (Cutkosky et al

Wellman, Michael P.

255

Author's personal copy Calibration procedures for a computational model of ductile fracture  

E-Print Network (OSTI)

Author's personal copy Calibration procedures for a computational model of ductile fracture Z. Xue fracture Computational fracture Shear fracture Damage parameters a b s t r a c t A recent extension of the cup-cone fracture mode in the neck of a round tensile bar. Ductility of a notched round bar provides

Hutchinson, John W.

256

Defining Multi-Disciplinary Views of a Computer Model of Buildings  

E-Print Network (OSTI)

Defining Multi-Disciplinary Views of a Computer Model of Buildings Robert W. Amor and Dr John G is the development, and maintenance, of multiple views of the building model as required by different disciplines method of accessing information in product data models to facilitate use by different building

Amor, Robert

257

Computational modeling of damage evolution in unidirectional fiber reinforced ceramic matrix composites  

E-Print Network (OSTI)

mechanical re- sponse of a ceramic matrix composite is simulated by a numerical model for a ®ber-matrix unitComputational modeling of damage evolution in unidirectional fiber reinforced ceramic matrix evolution in brittle matrix composites was developed. This modeling is based on an axisymmetric unit cell

Ortiz, Michael

258

Decision-Theoretic Rough Set Models Department of Computer Science, University of Regina,  

E-Print Network (OSTI)

Decision-Theoretic Rough Set Models Yiyu Yao Department of Computer Science, University of Regina, Regina, Saskatchewan, Canada S4S 0A2 E-mail: yyao@cs.uregina.ca Abstract. Decision-theoretic rough set models are a probabilistic exten- sion of the algebraic rough set model. The required parameters

Yao, Yiyu

259

The computational future for climate and Earth system models: on the path to petaflop and beyond  

Science Journals Connector (OSTI)

...computational future for climate and Earth system models: on the path to petaflop and...development of the climate and Earth system models has had a long history, starting...long-term goal of building the Earth system models that would go beyond what is...

2009-01-01T23:59:59.000Z

260

Modeling-Computer Simulations At Coso Geothermal Area (1999) | Open Energy  

Open Energy Info (EERE)

Modeling-Computer Simulations At Coso Geothermal Area (1999) Modeling-Computer Simulations At Coso Geothermal Area (1999) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Coso Geothermal Area (1999) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Modeling-Computer Simulations Activity Date 1999 Usefulness not indicated DOE-funding Unknown Exploration Basis To analyze attenuation and source properties Notes A multiple-empirical Green's function method was used to determine source properties of small (M -0.4 to 1.3) earthquakes and P-wave and S-wave attenuation at the Coso Geothermal Field. Source properties of a previously identified set of clustered events from the Coso geothermal region are first analyzed using an empirical Green's function (EGF) method.

Note: This page contains sample records for the topic "including computer modeling" 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

Modeling-Computer Simulations At Nw Basin & Range Region (Laney, 2005) |  

Open Energy Info (EERE)

Modeling-Computer Simulations At Nw Basin & Range Region (Laney, 2005) Modeling-Computer Simulations At Nw Basin & Range Region (Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Nw Basin & Range Region (Laney, 2005) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown Notes Assembling Crustal Geophysical Data for Geothermal Exploration in the Great Basin, Louie and Coolbaugh. We have compiled velocity information from sources in the literature, results of previous seismic experiments and earthquake-monitoring projects, and data donated from mining, geothermal, and petroleum companies. We also collected (May 2002 and August 2004) two

262

New Set of Computational Tools and Models Expected to Help Enable Rapid  

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

Set of Computational Tools and Models Expected to Help Enable Set of Computational Tools and Models Expected to Help Enable Rapid Development and Deployment of Carbon Capture Technologies New Set of Computational Tools and Models Expected to Help Enable Rapid Development and Deployment of Carbon Capture Technologies January 28, 2013 - 12:00pm Addthis Washington, DC - An eagerly anticipated suite of 21 computational tools and models to help enable rapid development and deployment of new carbon capture technologies is now available from the Carbon Capture Simulation Initiative (CCSI). Visit the CCSI website The toolset developed by CCSI, a public-private partnership led by the Office of Fossil Energy's (FE) National Energy Technology Laboratory (NETL), will help meet an urgent need by industry to take carbon capture

263

Running head: COGNITIVE ROBOTICS AND EXPERIMENTAL PSYCHOLOGY Computational Modeling/Cognitive Robotics Compliments  

E-Print Network (OSTI)

Running head: COGNITIVE ROBOTICS AND EXPERIMENTAL PSYCHOLOGY Computational Modeling/Cognitive;Cognitive Robotics and Experimental Psychology 2 Abstract This position paper explores the possible contributions to the science of psychology from insights obtained by building and experimenting with cognitive

Memphis, University of

264

THEORETICAL MODELING AND COMPUTATIONAL SIMULATION OF ROBUST CONTROL FOR MARS AIRCRAFT  

E-Print Network (OSTI)

The focus of this dissertation is the development of control system design algorithms for autonomous operation of an aircraft in the Martian atmosphere. This research will show theoretical modeling and computational simulation of robust control...

Oh, Seyool

2014-05-31T23:59:59.000Z

265

Engineering aspects of biological ion channels—from biosensors to computational models for permeation  

Science Journals Connector (OSTI)

This paper presents two important engineering aspects of biological ion channels—how to build sensors out of ... channels and how to construct computational models for ion channel permeation. We describe our rece...

Vikram Krishnamurthy; Bruce Cornell

2012-02-01T23:59:59.000Z

266

Development of a computational model for nuclear electric orbital transfer vehicles  

E-Print Network (OSTI)

DEVELOPMENT OF A COMPUTATIONAL MODEL FOR NUCLEAR ELECTRIC ORBITAL TRANSFER VEHICLES A Thesis by WILLIAM FOUNTAIN LYON III Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 1989 Major Subject: Nuclear Engineering DEVELOPMENT OF A COMPUTATIONAL MODEL FOR NUCLEAR ELECTRIC ORBITAL TRANSFER VEHICLES A Thesis by WILLIAM FOUNTAIN LYON III Approved as to style and content by: K. L...

Lyon, William Fountain

2012-06-07T23:59:59.000Z

267

The interaction of two closely spaced cracks - rock models and computer simulations  

E-Print Network (OSTI)

THE INTERACTION OF TWO CLOSELY SPACED CRACKS ROCK MODELS AND COMPUTER SIMULATIONS A Thesis by PENG LIN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1990 Major Subject: Geophysics THE INTERACTION OF TWO CLOSELY SPACED CRACKS ROCK MODELS AND COMPUTER SIMULATIONS A Thesis by PENG LIN Approved as to style and content by: o . ogan ( -Chair Committee) Andreas K. Kronenberg (Co...

Lin, Peng

2012-06-07T23:59:59.000Z

268

Computational fluid dynamics combustion modelling--A comparison of secondary air system designs  

SciTech Connect

A newly developed computer simulation of the combustion process in a kraft recovery furnace uses computational fluid dynamics to model the processes of mass, momentum, and energy transport. This paper describes two models and a presentation of the flow fields obtained. The results predict a dramatic improvement in combustion behavior using a refined secondary air system with reduction in particulate carryover, enhanced operating temperatures, more uniform gas flow, and less carbon monoxide at the furnace exit.

Jones, A.K. (ABB Combustion Engineering Systems, Ottawa, Ontario (Canada)); Chapman, P.J. (ABB Combustion Engineering Systems, Windsor, CT (United States))

1993-07-01T23:59:59.000Z

269

Computational Modeling of Combined Steam Pyrolysis and Hydrogasification of Ethanol  

E-Print Network (OSTI)

Model for High Temperature Ethanol Oxidation" Int. J. Chem.and Hydro- gasification of Ethanol Surinder P. Singh*, Chanand steam) steps to convert ethanol to methane. Ethanol was

Singh, S; Park, C S; Norbeck, J N

2005-01-01T23:59:59.000Z

270

Gaussian Process Modeling and Computation in Engineering Applications  

E-Print Network (OSTI)

; and predictive modeling for large datasets. First, we develop a spatial-temporal model for local wind fields in a wind farm with more than 200 wind turbines. Our framework utilizes the correlation among the derivatives of wind speeds to find a neighborhood...

Pourhabib, Arash

2014-07-08T23:59:59.000Z

271

Modeling Rules of Engagement in Computer Generated Forces Rick Evertsz  

E-Print Network (OSTI)

approach, ROE are defined as meta-knowledge that act as a constraint on the tactical choices selected. A key problem in modeling how military personnel behave during a conflict is to understand how ROE does not model the following factors: · ROE, · how a person selects a tactic within the scope

Ritter, Frank

272

The origins of computer weather prediction and climate modeling  

Science Journals Connector (OSTI)

Numerical simulation of an ever-increasing range of geophysical phenomena is adding enormously to our understanding of complex processes in the Earth system. The consequences for mankind of ongoing climate change will be far-reaching. Earth System Models ... Keywords: Climate modelling, History of NWP, Numerical weather prediction

Peter Lynch

2008-03-01T23:59:59.000Z

273

METHANE IN SUBSURFACE: MATHEMATICAL MODELING AND COMPUTATIONAL CHALLENGES  

E-Print Network (OSTI)

advanced models of adsorption occuring in coalbed methane recovery processes, and discuss the underlying methods, hysteresis, coalbed methane, mean-field equi- librium models AMS(MOS) subject classifications. 76 applications important for global climate and energy studies, namely Enhanced Coalbed Methane (ECBM) recovery

Peszynska, Malgorzata

274

Radial pulsations of neutron stars: computing alternative polytropic models regarding density and adiabatic index  

E-Print Network (OSTI)

We revisit the problem of radial pulsations of neutron stars by computing four general-relativistic polytropic models, in which "density" and "adiabatic index" are involved with their discrete meanings: (i) "rest-mass density" or (ii) "mass-energy density" regarding the density, and (i) "constant" or (ii) "variable" regarding the adiabatic index. Considering the resulting four discrete combinations, we construct corresponding models and compute for each model the frequencies of the lowest three radial modes. Comparisons with previous results are made. The deviations of respective frequencies of the resolved models seem to exhibit a systematic behavior, an issue discussed here in detail.

Vassilis Geroyannis; Georgios Kleftogiannis

2014-06-14T23:59:59.000Z

275

Computational modelling of biological systems: tools and visions  

Science Journals Connector (OSTI)

...on which future developments in health-care depend. The `added bene ts' of in silico technologies for health-care include the following. (i...decision making and long-term health- care policy development. Decision...

2000-01-01T23:59:59.000Z

276

Synthesis of Silver Colloids: Experiment and Computational Model  

E-Print Network (OSTI)

We summarize our recent results that model the formation of uniform spherical silver colloids prepared by mixing iso-ascorbic acid and silver-amine complex solutions in the absence of dispersants. We found that the experimental results can be modeled effectively by the two-stage formation mechanism used previously to model the preparation of colloidal gold spheres. The equilibrium concentration of silver atoms and the surface tension of silver precursor nanocrystals are both treated as free parameters, and the experimental reaction time scale is fit by a narrow region of this two-parameter space. The kinetic parameter required to match the final particle size is found to be very close to that used previously in modeling the formation of uniform gold particles, suggesting that similar kinetics governs the aggregation process. The model also reproduces semi quantitatively the effects of temperature and solvent viscosity on particle synthesis.

Ionel Halaciuga; Daniel T. Robb; Vladimir Privman; Dan V. Goia

2008-09-30T23:59:59.000Z

277

COMPUTATIONAL MODELING OF CATHODIC LIMITATIONS ON LOCALIZED CORROSION OF WETTED SS 316L, AT ROOM TEMPERATURE  

SciTech Connect

The ability of a SS316L surface wetted with a thin electrolyte layer to serve as an effective cathode for an active localized corrosion site was studied computationally. The dependence of the total net cathodic current, I{sub net}, supplied at the repassivation potential E{sub rp} (of the anodic crevice) on relevant physical parameters including water layer thickness (WL), chloride concentration ([Cl{sup -}]) and length of cathode (Lc) were investigated using a three-level, full factorial design. The effects of kinetic parameters including the exchange current density (i{sub o,c}) and Tafel slope ({beta}{sub c}) of oxygen reduction, the anodic passive current density (i{sub p}) (on the cathodic surface), and E{sub rp} were studied as well using three-level full factorial designs of [Cl{sup -}] and Lc with a fixed WL of 25 {micro}m. The study found that all the three parameters WL, [Cl{sup -}] and Lc as well as the interactions of Lc x WL and Lc x [Cl{sup -}] had significant impact on I{sub net}. A five-factor regression equation was obtained which fits the computation results reasonably well, but demonstrated that interactions are more complicated than can be explained with a simple linear model. Significant effects on I{sub net} were found upon varying either i{sub o,c}, {beta}{sub c}, or E{sub rp}, whereas i{sub p} in the studied range was found to have little impact. It was observed that I{sub net} asymptotically approached maximum values (I{sub max}) when Lc increased to critical minimum values. I{sub max} can be used to determine the stability of coupled localized corrosion and the critical Lc provides important information for experimental design and corrosion protection.

F. Cui; F.J. Presuel-Moreno; R.G. Kelly

2005-10-13T23:59:59.000Z

278

The computation of three-dimensional systems with various turbulence model variations  

SciTech Connect

The standard {kappa}-{epsilon} equations and other turbulence corrections are evaluated and reported with respect to their applicability in three-dimensional flows. The turbulence models are formulated on the assumption that an isotropic eddy viscosity and the modified Boussinesq hypothesis adequately describe the stress distributions, and that the source of predictive error is a consequence of the modeled terms in the {kappa}-{epsilon} equations. Turbulence model corrections are incorporated to investigate their impact on these errors. Predictions from various turbulence models are compared with experimental data from an isothermal 3-D configuration. The data comparisons delineate the relative advantages and disadvantages of various modifications. The {kappa}-{epsilon} model performs competitively with other model corrections and in some instances is judged to be superior than the modified treatments. However, given the additional computational time and the marginal superiority of the investigated models, it is recommended that present 3-D computational code calculations retain the standard {kappa}-{epsilon} model.

Hassan, M.A. [Cairo Univ., Giza (Egypt). Mechanical Power Engineering Dept.

1996-12-31T23:59:59.000Z

279

Modeling-Computer Simulations At U.S. West Region (Laney, 2005) | Open  

Open Energy Info (EERE)

Modeling-Computer Simulations At U.S. West Region Modeling-Computer Simulations At U.S. West Region (Laney, 2005) Exploration Activity Details Location U.S. West Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful regional reconnaissance DOE-funding Unknown Notes Characterization and Conceptual Modeling of Magmatically-Heated and Deep-Circulation, High-Temperature Hydrothermal Systems in the Basin and Range and Cordilleran United States, Moore, Nash, Nemcok, Lutz, Norton, Kaspereit, Berard, van de Putte, Johnson and Deymonaz. Utilizing a wealth of formerly proprietary subsurface samples and datasets for exemplary high-temperature western U.S. geothermal systems, develop and publish detailed and refined new conceptual and numerical hydrothermal-history models of fundamental scientific import but, more importantly, of use to

280

Universal Quantum Computation by Scattering in the Fermi-Hubbard Model  

E-Print Network (OSTI)

The Hubbard model may be the simplest model of particles interacting on a lattice, but simulation of its dynamics remains beyond the reach of current numerical methods. In this article, we show that general quantum computations can be encoded into the physics of wave packets propagating through a planar graph, with scattering interactions governed by the fermionic Hubbard model. Therefore, simulating the model on planar graphs is as hard as simulating quantum computation. We give two different arguments, demonstrating that the simulation is difficult both for wave packets prepared as excitations of the fermionic vacuum, and for hole wave packets at filling fraction one-half in the limit of strong coupling. In the latter case, which is described by the t-J model, there is only reflection and no transmission in the scattering events, as would be the case for classical hard spheres. In that sense, the construction provides a quantum mechanical analog of the Fredkin-Toffoli billiard ball computer.

Ning Bao; Patrick Hayden; Grant Salton; Nathaniel Thomas

2014-09-11T23:59:59.000Z

Note: This page contains sample records for the topic "including computer modeling" 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

A Computational Model for Explosive Fracture of Oil Shale  

Science Journals Connector (OSTI)

Successful in-situ retorting of subsurface oil shale beds may depend on the ability to ... develop a mathematical model for dynamic fracture of oil shale that could be used as a subroutine...

D. A. Shockey; W. J. Murri; R. E. Tokheim; C. Young…

1979-01-01T23:59:59.000Z

282

Scalable computational architecture for integrating biological pathway models  

E-Print Network (OSTI)

A grand challenge of systems biology is to model the cell. The cell is an integrated network of cellular functions. Each cellular function, such as immune response, cell division, metabolism or apoptosis, is defined by an ...

Shiva, V. A

2007-01-01T23:59:59.000Z

283

Modeling-Computer Simulations At Long Valley Caldera Geothermal...  

Open Energy Info (EERE)

and components of two continuous GPS time series. Additionally, the model explains the spatial extent of deformation observed by InSAR data covering the 1997-98 inflation...

284

Computational tools for modeling and measuring chromosome structure  

E-Print Network (OSTI)

DNA conformation within cells has many important biological implications, but there are challenges both in modeling DNA due to the need for specialized techniques, and experimentally since tracing out in vivo conformations ...

Ross, Brian Christopher

2012-01-01T23:59:59.000Z

285

EMSL - Molecular Science Computing  

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

computing Resources and Techniques Molecular Science Computing - Sophisticated and integrated computational capabilities, including scientific consultants, software, Cascade...

286

Integrated modeling of CO2 storage and leakage scenarios including transitions between super- and sub-critical conditions, and phase change between liquid and gaseous CO2  

SciTech Connect

Storage of CO{sub 2} in saline aquifers is intended to be at supercritical pressure and temperature conditions, but CO{sub 2} leaking from a geologic storage reservoir and migrating toward the land surface (through faults, fractures, or improperly abandoned wells) would reach subcritical conditions at depths shallower than 500-750 m. At these and shallower depths, subcritical CO{sub 2} can form two-phase mixtures of liquid and gaseous CO{sub 2}, with significant latent heat effects during boiling and condensation. Additional strongly non-isothermal effects can arise from decompression of gas-like subcritical CO{sub 2}, the so-called Joule-Thomson effect. Integrated modeling of CO{sub 2} storage and leakage requires the ability to model non-isothermal flows of brine and CO{sub 2} at conditions that range from supercritical to subcritical, including three-phase flow of aqueous phase, and both liquid and gaseous CO{sub 2}. In this paper, we describe and demonstrate comprehensive simulation capabilities that can cope with all possible phase conditions in brine-CO{sub 2} systems. Our model formulation includes: (1) an accurate description of thermophysical properties of aqueous and CO{sub 2}-rich phases as functions of temperature, pressure, salinity and CO{sub 2} content, including the mutual dissolution of CO{sub 2} and H{sub 2}O; (2) transitions between super- and subcritical conditions, including phase change between liquid and gaseous CO{sub 2}; (3) one-, two-, and three-phase flow of brine-CO{sub 2} mixtures, including heat flow; (4) non-isothermal effects associated with phase change, mutual dissolution of CO{sub 2} and water, and (de-) compression effects; and (5) the effects of dissolved NaCl, and the possibility of precipitating solid halite, with associated porosity and permeability change. Applications to specific leakage scenarios demonstrate that the peculiar thermophysical properties of CO{sub 2} provide a potential for positive as well as negative feedbacks on leakage rates, with a combination of self-enhancing and self-limiting effects. Lower viscosity and density of CO{sub 2} as compared to aqueous fluids provides a potential for self-enhancing effects during leakage, while strong cooling effects from liquid CO{sub 2} boiling into gas, and from expansion of gas rising towards the land surface, act to self-limit discharges. Strong interference between fluid phases under three-phase conditions (aqueous - liquid CO{sub 2} - gaseous CO{sub 2}) also tends to reduce CO{sub 2} fluxes. Feedback on different space and time scales can induce non-monotonic behavior of CO{sub 2} flow rates.

Pruess, K.

2011-05-15T23:59:59.000Z

287

WUFI COMPUTER MODELING WORKSHOP FOR WALL DESIGN AND PERFORMANCE  

E-Print Network (OSTI)

and Environment Council (BETEC), Owens Corning, and National Building Science Corporation (NBSC) of California from rain, solar radiation and other crucial weather events on an hourly basis. Both vapor and liquid transport are included, along with the sorptive capacity of building construction materials. WUFI ORNL

Oak Ridge National Laboratory

288

Reflections in computer modeling of rooms: Current approaches and possible extensions  

Science Journals Connector (OSTI)

Computer modeling of rooms is most commonly done by some calculation technique that is based on decomposing the sound field into separate reflection components. In a first step a list of possible reflection paths is found and in a second step an impulse response is constructed from the list of reflections. Alternatively the list of reflections is used for generating a simpler echogram the energy decay as function of time. A number of geometrical acoustics?based methods can handle specular reflections diffuse reflections edge diffraction curved surfaces and locally/non?locally reacting surfaces to various degrees. This presentation gives an overview of how reflections are handled in the image source method and variants of the ray?tracing methods which are dominating today in commercial software as well as in the radiosity method and edge diffraction methods. The use of the recently standardized scattering and diffusion coefficients of surfaces is discussed. Possibilities for combining edge diffraction surface scattering and impedance boundaries are demonstrated for an example surface. Finally the number of reflection paths becomes prohibitively high when all such combinations are included as demonstrated for a simple concert hall model. [Work supported by the Acoustic Research Centre through NFR Norway.

2005-01-01T23:59:59.000Z

289

Simulated movement of musculature in a computer generated model  

E-Print Network (OSTI)

properly when animated. The documentation of this process will be presented as a web-based tutorial for students and modelers. 1. 3 MOTIVATION: WHERE TO BUILD-IN MUSCLE DEFORMATION When building a character one must distinguish the areas where muscle... IMPORTANCE OF PROCESS The process required in making the steps to build parts of a character that exhibit muscle deformation will be documented in a web based tutorial. The tutorial will provide students and 3D modelers alike a template to discover...

Ten Wolde, Kristian Bernard

2000-01-01T23:59:59.000Z

290

Prediction and Uncertainty in Computational Modeling of Complex Phenomena: A Whitepaper  

SciTech Connect

This report summarizes some challenges associated with the use of computational science to predict the behavior of complex phenomena. As such, the document is a compendium of ideas that have been generated by various staff at Sandia. The report emphasizes key components of the use of computational to predict complex phenomena, including computational complexity and correctness of implementations, the nature of the comparison with data, the importance of uncertainty quantification in comprehending what the prediction is telling us, and the role of risk in making and using computational predictions. Both broad and more narrowly focused technical recommendations for research are given. Several computational problems are summarized that help to illustrate the issues we have emphasized. The tone of the report is informal, with virtually no mathematics. However, we have attempted to provide a useful bibliography that would assist the interested reader in pursuing the content of this report in greater depth.

Trucano, T.G.

1999-01-20T23:59:59.000Z

291

An agent-based computational model for bank formation and interbank networks  

E-Print Network (OSTI)

An agent-based computational model for bank formation and interbank networks Matheus R. Grasselli, interdependence, interaction, networks, and trust", all of which are absent from economic models where utility) intellectual history of the quest to base macroeconomic theory on solid micro foundation, culminating

Tesfatsion, Leigh

292

MODEL FUSION: A NEW APPROACH TO PROCESSING HETEROGENOUS DATA Department of Computer Science  

E-Print Network (OSTI)

MODEL FUSION: A NEW APPROACH TO PROCESSING HETEROGENOUS DATA OMAR OCHOA Department of Computer. Flores, Ph.D. Dean of the Graduate School #12;cCopyright by Omar Ochoa 2013 #12;MODEL FUSION: A NEW;Abstract In many practical situations, it is necessary to extract information from data of different types

Kreinovich, Vladik

293

Building ventilation : a pressure airflow model computer generation and elements of  

E-Print Network (OSTI)

Building ventilation : a pressure airflow model computer generation and elements of validation H - design #12;1- Introduction Regarding the number of airflow network models found in building publications Abstract : The calculation of airflows is of great importance for detailed building thermal simulation

Paris-Sud XI, Université de

294

STOCHASTIC COMPUTATIONAL DYNAMICAL MODEL OF UNCERTAIN STRUCTURE COUPLED WITH AN INSULATION LAYER  

E-Print Network (OSTI)

STOCHASTIC COMPUTATIONAL DYNAMICAL MODEL OF UNCERTAIN STRUCTURE COUPLED WITH AN INSULATION LAYER the effect of insulation layers in complex dynamical systems for low- and medium-frequency ranges such as car booming noise analysis, one introduces a sim- plified stochastic model of insulation layers based

Boyer, Edmond

295

CAE (computer aided engineering) driven durability model verification for the automotive structure development  

Science Journals Connector (OSTI)

Test/analysis correlation, in the refinement of finite element models to accord with test results of the modeled structure is an emerging field in the today's automotive industries. The accuracy of finite element analysis predictions in the linear and ... Keywords: CAE (computer aided engineering), Durability, EMBS (elastic multi body simulation), VPG (virtual proving ground), Vehicle body design

Dong-Chan Lee; Chang-Soo Han

2009-04-01T23:59:59.000Z

296

Toward Cost-Sensitive Modeling for Intrusion Detection Computer Science Department  

E-Print Network (OSTI)

Toward Cost-Sensitive Modeling for Intrusion Detection Wenke Lee Computer Science Department North,ezk,weaselg@cs.columbia.edu Abstract Intrusion detection systems need to maximize security while minimizing costs. In this paper, we study the problem of building cost-sensitive intrusion detection models. We examine the major cost

297

Letters: Neural network based hybrid computing model for wind speed prediction  

Science Journals Connector (OSTI)

This paper proposes a Neural Network based hybrid computing model for wind speed prediction in renewable energy systems. Wind energy is one of the renewable energy sources which lower the cost of electricity production. Due to the fluctuation and nonlinearity ... Keywords: Hybrid Model, Multilayer Perceptron, Neural Networks, Self Organizing Maps, Wind Speed Prediction

K. Gnana Sheela; S. N. Deepa

2013-12-01T23:59:59.000Z

298

A Three-Dimensional Computational Model of PEM Fuel Cell with Serpentine Gas Channels  

E-Print Network (OSTI)

A Three-Dimensional Computational Model of PEM Fuel Cell with Serpentine Gas Channels by Phong) fuel cell with serpentine gas flow channels is presented in this thesis. This comprehensive model accounts for important transport phenomena in a fuel cell such as heat transfer, mass transfer, electrode

Victoria, University of

299

Modeling ISP Tier Design School of Information and Computer Science  

E-Print Network (OSTI)

University of California, Irvine Irvine, CA, US sjordan@uci.edu Abstract-- We model how Internet Service are considered as the two dominant Internet applications. We propose a novel set of utility functions that depend, and network capacity that maximize Internet Service Provider profit, defined as subscription revenue minus

Jordan, Scott

300

An enhanced Lemaitre model formulation for materials processing damage computation  

E-Print Network (OSTI)

are presented and discussed to deal with complex multiaxial configurations ­ such as multi-stages bulk forming loading, involving crack closure effects. - Simple parameters identification: whatever the damage model used, the identification of damage parameters is an important issue. Most of the time

Boyer, Edmond

Note: This page contains sample records for the topic "including computer modeling" 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

Modeling-Computer Simulations At Obsidian Cliff Area (Hulen, Et Al., 2003)  

Open Energy Info (EERE)

Obsidian Cliff Area (Hulen, Et Al., 2003) Obsidian Cliff Area (Hulen, Et Al., 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Obsidian Cliff Area (Hulen, Et Al., 2003) Exploration Activity Details Location Obsidian Cliff Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown References Jeff Hulen, Denis Norton, Dennis Kaspereit, Larry Murray, Todd van de Putte, Melinda Wright (2003) Geology And A Working Conceptual Model Of The Obsidian Butte (Unit 6) Sector Of The Salton Sea Geothermal Field, California Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Obsidian_Cliff_Area_(Hulen,_Et_Al.,_2003)&oldid=388945" Category: Exploration

302

Modeling-Computer Simulations At Long Valley Caldera Area (Pribnow, Et Al.,  

Open Energy Info (EERE)

2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Long Valley Caldera Area (Pribnow, Et Al., 2003) Exploration Activity Details Location Long Valley Caldera Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown Notes Several fluid-flow models presented regarding the Long Valley Caldera. At shallow depths in the caldera References Daniel F. C. Pribnow, Claudia Schutze, Suzanne J. Hurter, Christina Flechsig, John H. Sass (2003) Fluid Flow In The Resurgent Dome Of Long Valley Caldera- Implications From Thermal Data And Deep Electrical Sounding Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Long_Valley_Caldera_Area_(Pribnow,_Et_Al.,_2003)&oldid=389388

303

Modeling-Computer Simulations At Fenton Hill Hdr Geothermal Area (Heiken &  

Open Energy Info (EERE)

Heiken & Heiken & Goff, 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Fenton Hill Hdr Geothermal Area (Heiken & Goff, 1983) Exploration Activity Details Location Fenton Hill Hdr Geothermal Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown Notes Development of a geologically-based model of the thermal and hydrothermal potential of the Fenton Hill HDR area. References Grant Heiken, Fraser Goff (1983) Hot Dry Rock Geothermal Energy In The Jemez Volcanic Field, New Mexico Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Fenton_Hill_Hdr_Geothermal_Area_(Heiken_%26_Goff,_1983)&oldid=511328

304

Modeling-Computer Simulations At General Us Region (Goff & Decker, 1983) |  

Open Energy Info (EERE)

Us Region (Goff & Decker, 1983) Us Region (Goff & Decker, 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At General Us Region (Goff & Decker, 1983) Exploration Activity Details Location General Us Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Review and identification of 24 potential sites for EGS development across the U.S., as well as modeling of the representative geologic systems in which promising EGS sites occur. References Fraser Goff, Edward R. Decker (1983) Candidate Sites For Future Hot Dry Rock Development In The United States Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_General_Us_Region_(Goff_%26_Decker,_1983)&oldid=38761

305

Modeling-Computer Simulations At Geysers Area (Goff & Decker, 1983) | Open  

Open Energy Info (EERE)

Decker, 1983) Decker, 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Geysers Area (Goff & Decker, 1983) Exploration Activity Details Location Geysers Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Review and identification of 24 potential sites for EGS development across the U.S., as well as modeling of the representative geologic systems in which promising EGS sites occur. References Fraser Goff, Edward R. Decker (1983) Candidate Sites For Future Hot Dry Rock Development In The United States Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Geysers_Area_(Goff_%26_Decker,_1983)&oldid=38676

306

Modeling-Computer Simulations At White Mountains Area (Goff & Decker, 1983)  

Open Energy Info (EERE)

White Mountains Area (Goff & Decker, 1983) White Mountains Area (Goff & Decker, 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At White Mountains Area (Goff & Decker, 1983) Exploration Activity Details Location White Mountains Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Review and identification of 24 potential sites for EGS development across the U.S., as well as modeling of the representative geologic systems in which promising EGS sites occur. References Fraser Goff, Edward R. Decker (1983) Candidate Sites For Future Hot Dry Rock Development In The United States Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_White_Mountains_Area_(Goff_%26_Decker,_1983)&oldid=387355"

307

Modeling-Computer Simulations At Fenton Hill Hdr Geothermal Area (Goff &  

Open Energy Info (EERE)

Decker, 1983) Decker, 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Fenton Hill Hdr Geothermal Area (Goff & Decker, 1983) Exploration Activity Details Location Fenton Hill Hdr Geothermal Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Review and identification of 24 potential sites for EGS development across the U.S., as well as modeling of the representative geologic systems in which promising EGS sites occur. References Fraser Goff, Edward R. Decker (1983) Candidate Sites For Future Hot Dry Rock Development In The United States Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Fenton_Hill_Hdr_Geothermal_Area_(Goff_%26_Decker,_1983)&oldid=511326"

308

Modeling-Computer Simulations At Nw Basin & Range Region (Blackwell, Et  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Modeling-Computer Simulations At Nw Basin & Range Region (Blackwell, Et Al., 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Nw Basin & Range Region (Blackwell, Et Al., 2003) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Developed natural state mass and energy transport fluid flow models of generic Basin and Range systems based on Dixie Valley data that help to

309

Modeling-Computer Simulations At Valles Caldera - Redondo Area (Wilt &  

Open Energy Info (EERE)

Redondo Area (Wilt & Redondo Area (Wilt & Haar, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Valles Caldera - Redondo Area (Wilt & Haar, 1986) Exploration Activity Details Location Valles Caldera - Redondo Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes A computer program capable of two-dimensional modeling of gravity data was used in interpreting gravity observations along profiles A--A' and B--B' (Talwani et al., 1959). Densities of 2.12, 2.40, and 2.65 g/cm a were used for modeling the near-surface caldera fill, the underlying volcanics, and the basement sections, respectively (Fig. 8). Although correlation with

310

A Novel Computational Model for Tilting Pad Journal Bearings with Soft Pivot Stiffnesses  

E-Print Network (OSTI)

A novel tilting pad journal bearing model including pivot flexibility as well as temporal fluid inertia effects on the thin film fluid flow aims to accurately predict the bearing forced performance. The predictive model also accounts for the thermal...

Tao, Yujiao 1988-

2012-12-10T23:59:59.000Z

311

A computer music instrumentarium  

E-Print Network (OSTI)

Chapter 6. COMPUTERS: To Solder or Not toMusic Models : A Computer Music Instrumentarium . . . . .Interactive Computer Systems . . . . . . . . . . . . . . 101

Oliver La Rosa, Jaime Eduardo

2011-01-01T23:59:59.000Z

312

Computational Knee Ligament Modeling Using Experimentally Determined Zero-Load Lengths  

E-Print Network (OSTI)

to model kinematics [7, 9]. In this method, cadaver knees are loaded with known forces (for example with a robotic testing system [13]) and ligament parameters are modified until the kinematic error between model and experiment is minimized. This method... Corporation, Santa Ana, CA) (Fig. 1). The anatomical points identified during the cadaver testing were used to align the knee geometries (tibia, femur, and patella) with the machine in the computational model. Compliant contacts were then defined between...

Bloemker, Katherine H.; Guess, Trent M.; Maletsky, Lorin; Dodd, Kevin A.

2012-04-01T23:59:59.000Z

313

A computer-aided modelling analogue for lattice dynamics  

Science Journals Connector (OSTI)

A useful methodology to study lattice dynamics is presented in this paper. Our method is based on the analogous behaviour of electromagnetic waves in transmission lines. The parameters analysed include the optical and acoustical branches and the frequency gap. The electrical circuit is solved using commercial software (MicroCap ); therefore, our methodology would be easily implemented on different systems. Resumen. En este trabajo se presenta una metodología útil para estudiar dinámica de redes. Nuestro método se basa en el comportamiento análogo de las ondas electromagnéticas en las líneas de transmición. Los parámetros analizados incluyen las ramas óptica y acústica y el gap de frecuencia. El circuito eléctrico es resuelto utlizando un software comercial (MicroCap ); por lo que nuestra metodologiá puede ser fácilmente implementada en diferentes sistemas.

Daniel Vega; Sergio Vera; Alfredo Juan

1997-01-01T23:59:59.000Z

314

Modeling-Computer Simulations At Nevada Test And Training Range Area  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Modeling-Computer Simulations At Nevada Test And Training Range Area (Sabin, Et Al., 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Nevada Test And Training Range Area (Sabin, Et Al., 2004) Exploration Activity Details Location Nevada Test And Training Range Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown Notes Nellis Air Force Range (NAFR) occupies over 3 million acres in southern Nevada (Figure 1). We recently assessed potential utility-grade geothermal

315

Modeling-Computer Simulations At Walker-Lane Transitional Zone Region  

Open Energy Info (EERE)

Modeling-Computer Simulations At Walker-Lane Modeling-Computer Simulations At Walker-Lane Transitional Zone Region (Laney, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness not indicated DOE-funding Unknown Notes Assembling Crustal Geophysical Data for Geothermal Exploration in the Great Basin, Louie and Coolbaugh. We have compiled velocity information from sources in the literature, results of previous seismic experiments and earthquake-monitoring projects, and data donated from mining, geothermal, and petroleum companies. We also collected (May 2002 and August 2004) two new crustal refraction profiles across western Nevada and the northern and central Sierra. These sections had not been well characterized previously.

316

Modeling-Computer Simulations At Raft River Geothermal Area (1980) | Open  

Open Energy Info (EERE)

80) 80) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Raft River Geothermal Area (1980) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Modeling-Computer Simulations Activity Date 1980 Usefulness not indicated DOE-funding Unknown Exploration Basis From refined estimates of reservoir coefficients better predictions of interference effects and long-term drawdown in the wells can be made. Notes Analytic methods have been used during reservoir testing to calculate reservoir coefficients. However, anisotropy of the reservoir due to fractures has not been taken into account in these calculations and estimates of these coefficients need to be refined. In conjunction with the

317

Optical distortions and birefringence in high power laser windows: model and computer code  

SciTech Connect

A general optical model is given which predicts optical wave front distortions and birefringence due to stress and temperature variations in laser heated and pressure loaded windows for cubic lattice window materials. A computer code is described that integrates stress and thermal computations with an optical model to predict the wave front distortions. Restrictive approximations, which have been used previously to predict window temperatures and stress distributions, are avoided by using stress and thermal codes to predict these distributions within the windows. Comparisons between code predictions and experimental results are given.

Greninger, C.E.; Needham, G.A.; Rebar J. Jr.

1985-09-01T23:59:59.000Z

318

Modeling CO{sub 2}-Brine-Rock Interaction Including Mercury and H{sub 2}S Impurities in the Context of CO{sub 2} Geologic Storage  

SciTech Connect

This study uses modeling and simulation approaches to investigate the impacts on injectivity of trace amounts of mercury (Hg) in a carbon dioxide (CO{sub 2}) stream injected for geologic carbon sequestration in a sandstone reservoir at ~2.5 km depth. At the range of Hg concentrations expected (7-190 ppbV, or ~ 0.06-1.6 mg/std.m{sup 3}CO{sub 2}), the total volumetric plugging that could occur due to complete condensation of Hg, or due to complete precipitation of Hg as cinnabar, results in a very small porosity change. In addition, Hg concentration much higher than the concentrations considered here would be required for Hg condensation to even occur. Concentration of aqueous Hg by water evaporation into CO{sub 2} is also unlikely because the higher volatility of Hg relative to H{sub 2}O at reservoir conditions prevents the Hg concentration from increasing in groundwater as dry CO{sub 2} sweeps through, volatilizing both H{sub 2}O and Hg. Using a model-derived aqueous solution to represent the formation water, batch reactive geochemical modeling show that the reaction of the formation water with the CO{sub 2}-Hg mixture causes the pH to drop to about 4.7 and then become buffered near 5.2 upon reaction with the sediments, with a negligible net volume change from mineral dissolution and precipitation. Cinnabar (HgS(s)) is found to be thermodynamically stable as soon as the Hg-bearing CO{sub 2} reacts with the formation water which contains small amounts of dissolved sulfide. Liquid mercury (Hg(l)) is not found to be thermodynamically stable at any point during the simulation. Two-dimensional radial reactive transport simulations of CO{sub 2} injection at a rate of 14.8 kg/s into a 400 m-thick formation at isothermal conditions of 106°C and average pressure near 215 bar, with varying amounts of Hg and H{sub 2}S trace gases, show generally that porosity changes only by about ±0.05% (absolute, i.e., new porosity = initial porosity ±0.0005) with Hg predicted to readily precipitate from the CO{sub 2} as cinnabar in a zone mostly matching the single-phase CO{sub 2} plume. The precipitation of minerals other than cinnabar, however, dominates the evolution of porosity. Main reactions include the replacement of primarily Fe-chlorite by siderite, of calcite by dolomite, and of K-feldspar by muscovite. Chalcedony is also predicted to precipitate from the dissolution of feldspars and quartz. Although the range of predicted porosity change is quite small, the amount of dissolution and precipitation predicted for these individual minerals is not negligible. These reactive transport simulations assume that Hg gas behaves ideally. To examine effects of non-ideality on these simulations, approximate calculations of the fugacity coefficient of Hg in CO{sub 2} were made. Results suggest that Hg condensation could be significantly overestimated when assuming ideal gas behavior, making our simulation results conservative with respect to impacts on injectivity. The effect of pressure on Henry’s constant for Hg is estimated to yield Hg solubilities about 10% lower than when this effect is not considered, a change that is considered too small to affect the conclusions of this report. Although all results in this study are based on relatively mature data and modeling approaches, in the absence of experimental data and more detailed site-specific information, it is not possible to fully validate the results and conclusions.

Spycher, N.; Oldenburg, C.M.

2014-01-01T23:59:59.000Z

319

Pump apparatus including deconsolidator  

DOE Patents (OSTI)

A pump apparatus includes a particulate pump that defines a passage that extends from an inlet to an outlet. A duct is in flow communication with the outlet. The duct includes a deconsolidator configured to fragment particle agglomerates received from the passage.

Sonwane, Chandrashekhar; Saunders, Timothy; Fitzsimmons, Mark Andrew

2014-10-07T23:59:59.000Z

320

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 model A detailed cell model was obtained [9] by writing the conservation laws in the solid parts

Herbin, Raphaèle

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


321

Engineering computer models for refrigerators, freezers, furnaces, water heaters, room and central air conditioners  

SciTech Connect

This User's Guide provides the necessary information for understanding and using a computer model developed for the US Department of Energy which predicts the performance (energy consumption) of household refrigerators, refrigerator-freezers, and freezers. The model is capable of simulating various cabinet configurations (top-mount, bottom-mount, side-by-side, single-door) and refrigeration unit combinations (back-mounted static condenser with single forced convection evaporator, hot wall condenser with cooled wall panels, etc.). The program is comprised of two main subroutines: a cabinet heat-load submodel and a refrigeration unit submodel; they can be used separately for preliminary design analysis or together for performance evaluations. A technical description of the model and information on how to structure input parameters are provided. The user is provided with specific guidance for running the model on a computer. Specific instructions are given in the Appendices for changing and running the model using the operating language compatible with the DOE computer terminal system. Other users will have to modify the procedures in these sections as necessary for different computers.

Not Available

1982-11-01T23:59:59.000Z

322

Relating toy models of quantum computation: comprehension, complementarity and dagger mix autonomous categories  

E-Print Network (OSTI)

Toy models have been used to separate important features of quantum computation from the rich background of the standard Hilbert space model. Category theory, on the other hand, is a general tool to separate components of mathematical structures, and analyze one layer at a time. It seems natural to combine the two approaches, and several authors have already pursued this idea. We explore *categorical comprehension construction* as a tool for adding features to toy models. We use it to comprehend quantum propositions and probabilities within the basic model of finite-dimensional Hilbert spaces. We also analyze complementary quantum observables over the category of sets and relations. This leads into the realm of *test spaces*, a well-studied model. We present one of many possible extensions of this model, enabled by the comprehension construction. Conspicuously, all models obtained in this way carry the same categorical structure, *extending* the familiar dagger compact framework with the complementation operations. We call the obtained structure *dagger mix autonomous*, because it extends mix autonomous categories, popular in computer science, in a similar way like dagger compact structure extends compact categories. Dagger mix autonomous categories seem to arise quite naturally in quantum computation, as soon as complementarity is viewed as a part of the global structure.

Dusko Pavlovic

2010-06-05T23:59:59.000Z

323

Multibeam Observations of Mine Scour and Burial near Clearwater, Florida, Including a Test of the VIMS 2D Mine Burial Model  

E-Print Network (OSTI)

of the VIMS 2D Mine Burial Model by Monica L. Wolfson A thesis submitted in partial fulfillment Comparison of A3 Multibeam Observations to the VIMS 2D Burial Model Comparison of F8 Multibeam Observations to the VIMS 2D Burial Model

New Hampshire, University of

324

Mathematical modelling approach for determining optimal machining parameters in turning with computer numerical control (CNC) machines  

Science Journals Connector (OSTI)

Due to advancement in the manufacturing technology the application of computer numerical control (CNC) machines have increased manifolds. The determination of machining parameters for optimal results in machining is a part of computer aided process planning. In computer numerical control (CNC) machining, determining optimum or appropriate cutting parameters can minimise machining errors such as tool breakage, tool deflection and tool wear, thus yielding a high productivity or minimum cost. Different mathematical models have been proposed by various researchers in the past for the determination of optimal machining parameters. The present paper attempt's to review the literature regarding 'machining parameter optimisation' for turning operation in CNC machines. Diverse contributing and important factors in mathematical modelling like, the economic criteria's, single and multi-pass turning, optimisation techniques and practical constraints deployed have been considered. A detailed discussion is presented regarding the topic and in the end conclusions are drawn.

Bhaskar Naithani; Santram Chauhan

2012-01-01T23:59:59.000Z

325

MATHEMATICAL PERGAMON Mathematical and Computer Modelling 35 (2002) 1371-1375  

E-Print Network (OSTI)

Application to the Efficiency of Free Flow Turbines A. GORBAN' Institute of Computational Modeling, Russian obstacle is considered. Its application to estimating the efficiency of free flow turbines is discussed "efficiency" is referred to as the ratio of the power utilized by the turbine to the power carried

Gorban, Alexander N.

326

A versatile computer model for the design and analysis of electric and hybrid vehicles  

E-Print Network (OSTI)

The primary purpose of the work reported in this thesis was to develop a versatile computer model to facilitate the design and analysis of hybrid vehicle drive-trains. A hybrid vehicle is one in which power for propulsion comes from two distinct...

Stevens, Kenneth Michael

1996-01-01T23:59:59.000Z

327

iGrace emotional computational model for EmI companion robot.  

E-Print Network (OSTI)

0 iGrace ­ emotional computational model for EmI companion robot. S´ebastien Saint. Introduction A new challenge in Robotics is to create systems capable of behaviour enhancement due modality in human communication. Robotherapy, a field in robotics, attempts to apply the principles

Paris-Sud XI, Université de

328

Lattice Boltzmann method is a powerful tech-nique for the computational modeling of a wide  

E-Print Network (OSTI)

Lattice Boltzmann method is a powerful tech- nique for the computational modeling of a wide variety in solving several isothermal flow problems the lattice boltzmann Method has not been able yet to simulate micro flows. July 2006 Entropic Lattice Boltzmann simulation of trans- port phenomena in microflows

Sandoghdar, Vahid

329

Medical Nuclear Supply Chain Design: A Tractable Network Model and Computational Approach  

E-Print Network (OSTI)

Medical Nuclear Supply Chain Design: A Tractable Network Model and Computational Approach Anna of medical nuclear supply chains. Our focus is on the molybdenum supply chain, which is the most commonly is of special relevance to healthcare given the medical nuclear product's widespread use as well as the aging

Nagurney, Anna

330

Multiple temperature kinetic model and gas-kinetic method for hypersonic non-equilibrium flow computations  

E-Print Network (OSTI)

Multiple temperature kinetic model and gas-kinetic method for hypersonic non-equilibrium flow. For the non-equilibrium flow computations, i.e., the nozzle flow and hypersonic rarefied flow over flat plate-kinetic method; Hypersonic and rarefied flows 1. Introduction The development of aerospace technology has

Xu, Kun

331

Patient specific finite element model of the face soft tissues for computer-assisted  

E-Print Network (OSTI)

(dental models) and radiology (cephalometry). This paper presents a complete protocol for computer of the dental occlusion, and aesthetic, with morphometric criterion that run out of a norm (face asym- metry a planning based only on skull and dental analysis. Moreover, one of the main patient requests is a reliable

Paris-Sud XI, Université de

332

University of Central Florida Overcoming extreme water conditions through computer modeling  

E-Print Network (OSTI)

can better predict the effects of extreme water events," he added. Hagen's team produced an accurateUniversity of Central Florida Overcoming extreme water conditions through computer modeling In recent years, we've witnessed the devastating effects of too much water. The great Indian Ocean tsunami

Central Florida, University of

333

An Exact Modeling of Signal Statistics in Energy-integrating X-ray Computed Tomography  

E-Print Network (OSTI)

assumption was made that the number of x-ray quanta within an energy interval in the spectrum followsAn Exact Modeling of Signal Statistics in Energy-integrating X-ray Computed Tomography Yi Fan1 School of Medicine, Atlanta, GA 30322 ABSTRACT Energy-integrating detection of x-ray sources is widely

334

Experimental Validation of a Computational Fluid Dynamics Model for IAQ applications in Ice Rink Arenas  

E-Print Network (OSTI)

1 Experimental Validation of a Computational Fluid Dynamics Model for IAQ applications in Ice Rink, USA, Fax: 617-432-4122, Abstract Many ice rink arenas have ice resurfacing equipment that uses fossil temperature distributions in ice rinks. The numerical results agree reasonably with the corresponding

Chen, Qingyan "Yan"

335

OrgAhead: A Computational Model of Organizational CASOS Technical Report  

E-Print Network (OSTI)

of organizational learning and decision- Learning and Decision Making [Version 2.1.5] g Lee1 and Kathleen M. Ca mimicking each specific behavior. #12;Keywords: simulated annealing, organizational learning, adaptationOrgAhead: A Computational Model of Organizational CASOS Technical Report Ju-Sun rley2 CMU-ISRI-04

336

OrgAhead: A Computational Model of Organizational CASOS Technical Report  

E-Print Network (OSTI)

of organizational learning and decision­ Learning and Decision Making [Version 2.1.5] g Lee 1 and Kathleen M. Ca mimicking each specific behavior. #12; Keywords: simulated annealing, organizational learning, adaptationOrgAhead: A Computational Model of Organizational CASOS Technical Report Ju­Sun rley 2 CMU­ISRI­04

337

COMPUTATIONAL CHALLENGES IN THE NUMERICAL TREATMENT OF LARGE AIR POLLUTION MODELS  

E-Print Network (OSTI)

COMPUTATIONAL CHALLENGES IN THE NUMERICAL TREATMENT OF LARGE AIR POLLUTION MODELS I. DIMOV , K. GEORGIEVy, TZ. OSTROMSKY , R. J. VAN DER PASz, AND Z. ZLATEVx Abstract. The air pollution, and especially the reduction of the air pollution to some acceptable levels, is an important environmental problem, which

Dimov, Ivan

338

Fluid computation of the performanceenergy trade-off in large scale Markov models  

E-Print Network (OSTI)

total energy consumption should be chosen. H priority job SLA: 6.5s 90% L priority job SLA: 8s 80Fluid computation of the performance­energy trade-off in large scale Markov models Anton Stefanek to deal with is that of running costs such as energy consumption versus the availability and re- sponse

Imperial College, London

339

Between-Source Modelling for Likelihood Ratio Computation in Forensic Biometric Recognition  

E-Print Network (OSTI)

Between-Source Modelling for Likelihood Ratio Computation in Forensic Biometric Recognition Daniel, Switzerland Abstract. In this paper, the use of biometric systems in forensic ap- plications is reviewed. Main differences between the aim of commercial biometric systems and forensic reporting are highlighted, showing

Autonoma de Madrid, Universidad

340

Technical Review of the CENWP Computational Fluid Dynamics Model of the John Day Dam Forebay  

SciTech Connect

The US Army Corps of Engineers Portland District (CENWP) has developed a computational fluid dynamics (CFD) model of the John Day forebay on the Columbia River to aid in the development and design of alternatives to improve juvenile salmon passage at the John Day Project. At the request of CENWP, Pacific Northwest National Laboratory (PNNL) Hydrology Group has conducted a technical review of CENWP's CFD model run in CFD solver software, STAR-CD. PNNL has extensive experience developing and applying 3D CFD models run in STAR-CD for Columbia River hydroelectric projects. The John Day forebay model developed by CENWP is adequately configured and validated. The model is ready for use simulating forebay hydraulics for structural and operational alternatives. The approach and method are sound, however CENWP has identified some improvements that need to be made for future models and for modifications to this existing model.

Rakowski, Cynthia L.; Serkowski, John A.; Richmond, Marshall C.

2010-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "including computer modeling" 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

Optimization of Computational Performance and Accuracy in 3?D Transient CFD Model for CFB Hydrodynamics Predictions  

Science Journals Connector (OSTI)

This work aims to present a pure 3?D CFD model accurate and efficient for the simulation of a pilot scale CFB hydrodynamics. The accuracy of the model was investigated as a function of the numerical parameters in order to derive an optimum model setup with respect to computational cost. The necessity of the in depth examination of hydrodynamics emerges by the trend to scale up CFBCs. This scale up brings forward numerous design problems and uncertainties which can be successfully elucidated by CFD techniques. Deriving guidelines for setting a computational efficient model is important as the scale of the CFBs grows fast while computational power is limited. However the optimum efficiency matter has not been investigated thoroughly in the literature as authors were more concerned for their models accuracy and validity. The objective of this work is to investigate the parameters that influence the efficiency and accuracy of CFB computational fluid dynamics models find the optimum set of these parameters and thus establish this technique as a competitive method for the simulation and design of industrial large scale beds where the computational cost is otherwise prohibitive. During the tests that were performed in this work the influence of turbulence modeling approach time and space density and discretization schemes were investigated on a 1.2 MWth CFB test rig. Using Fourier analysis dominant frequencies were extracted in order to estimate the adequate time period for the averaging of all instantaneous values. The compliance with the experimental measurements was very good. The basic differences between the predictions that arose from the various model setups were pointed out and analyzed. The results showed that a model with high order space discretization schemes when applied on a coarse grid and averaging of the instantaneous scalar values for a 20 sec period adequately described the transient hydrodynamic behaviour of a pilot CFB while the computational cost was kept low. Flow patterns inside the bed such as the core?annulus flow and the transportation of clusters were at least qualitatively captured.

I. Rampidis; A. Nikolopoulos; N. Koukouzas; P. Grammelis; E. Kakaras

2007-01-01T23:59:59.000Z

342

Unit physics testing of a mix model in an eulerian fluid computation  

SciTech Connect

A K-L turbulence mix model driven with a drag-buoyancy source term is tested in an Eulerian code in a series of basic unit-physics tests, as part of a mix validation milestone. The model and the closure coefficient values are derived in the work of Dimonte-Tipton [D-T] in Phys.Flu.18, 085101 (2006), and many of the test problems were reported there, where the mix model operated in Lagrange computations. The drag-buoyancy K-L mix model was implemented within the Eulerian code framework by A.J. Scannapieco. Mix model performance is evaluated in terms of mix width growth rates compared to experiments in select regimes. Results in our Eulerian code are presented for several unit-physics I-D test problems including the decay of homogeneous isotropic turbulence (HIT), Rayleigh-Taylor (RT) unstable mixing, shock amplification of initial turbulence, Richtmyer-Meshkov (RM) mixing in several single shock test cases and in comparison to two RM experiments including re-shock (Vetter-Sturtevant and Poggi, et.al.). Sensitivity to model parameters, to Atwood number, and to initial conditions are examined. Results here are in good agreement in some tests (HIT, RT) with the previous results reported for the mix model in the Lagrange calculations. The HIT turbulent decay agrees closely with analytic expectations, and the RT growth rate matches experimental values for the default values of the model coefficients proposed in [D-T]. Results for RM characterized with a power law growth rate differ from the previous mix model work but are still within the range for reasonable agreement with experiments. Sensitivity to IC values in the RM studies are examined; results are sensitive to initial values of L[t=O], which largely determines the RM mix layer growth rate, and generally differs from the IC values used in the RT studies. Result sensitivity to initial turbulence, K[t=O], is seen to be small but significant above a threshold value. Initial conditions can be adjusted so that single shock RM mix width results match experiments but we have not been able to obtain a good match for first shock and re-shock growth rates in the same experiment with a single set of parameters and Ie. Problematic issues with KH test problems are described. Resolution studies for an RM test problem show the K-L mix growth rate decreases as it converges at a supra-linear rate, and, convergence requires a fine grid (on the order of 10 microns). For comparison, a resolution study of a second mix model [Scannapieco and Cheng, Phys.Lett.A, 299(1),49, (2002)] acting on a two fluid interface problem was examined. The mix in this case was found to increase with grid resolution at low to moderate resolutions, but converged at comparably fine resolutions. In conclusion, these tests indicate that the Eulerian code K-L model, using the Dimonte Tipton default model closure coefficients, achieve reasonable results across many of the unit-physics experimental conditions. However, we were unable to obtain good matches simultaneously for shock and re-shock mix in a single experiment. Results are sensitive to initial conditions in the regimes under study, with different IC best suited to RT or RM mix. It is reasonable to expect IC sensitivity in extrapolating to high energy density regimes, or to experiments with deceleration due to arbitrary combinations of RT and RM. As a final comparison, the atomically generated mix fraction and the mix width were each compared for the K-L mix model and the Scannapieco model on an identical RM test problem. The Scannapieco mix fraction and width grow linearly. The K-L mix fraction and width grow with the same power law exponent, in contrast to expectations from analysis. In future work it is proposed to do more head-to-head comparisons between these two models and other mix model options on a full suite of physics test problems, such as interfacial deceleration due to pressure build-up during an idealized ICF implosion.

Vold, Erik [Los Alamos National Laboratory; Douglass, Rod [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

343

COBRA-SFS (Spent Fuel Storage): A thermal-hydraulic analysis computer code: Volume 1, Mathematical models and solution method  

SciTech Connect

COBRA-SFS (Spent Fuel Storage) is a general thermal-hydraulic analysis computer code used to predict temperatures and velocities in a wide variety of systems. The code was refined and specialized for spent fuel storage system analyses for the US Department of Energy's Commercial Spent Fuel Management Program. The finite-volume equations governing mass, momentum, and energy conservation are written for an incompressible, single-phase fluid. The flow equations model a wide range of conditions including natural circulation. The energy equations include the effects of solid and fluid conduction, natural convection, and thermal radiation. The COBRA-SFS code is structured to perform both steady-state and transient calculations: however, the transient capability has not yet been validated. This volume describes the finite-volume equations and the method used to solve these equations. It is directed toward the user who is interested in gaining a more complete understanding of these methods.

Rector, D.R.; Wheeler, C.L.; Lombardo, N.J.

1986-11-01T23:59:59.000Z

344

The Impact of IBM Cell Technology on the Programming Paradigm in the Context of Computer Systems for Climate and Weather Models  

SciTech Connect

The call for ever-increasing model resolutions and physical processes in climate and weather models demands a continual increase in computing power. The IBM Cell processor's order-of-magnitude peak performance increase over conventional processors makes it very attractive to fulfill this requirement. However, the Cell's characteristics, 256KB local memory per SPE and the new low-level communication mechanism, make it very challenging to port an application. As a trial, we selected the solar radiation component of the NASA GEOS-5 climate model, which: (1) is representative of column physics components (half the total computational time), (2) has an extremely high computational intensity: the ratio of computational load to main memory transfers, and (3) exhibits embarrassingly parallel column computations. In this paper, we converted the baseline code (single-precision Fortran) to C and ported it to an IBM BladeCenter QS20. For performance, we manually SIMDize four independent columns and include several unrolling optimizations. Our results show that when compared with the baseline implementation running on one core of Intel's Xeon Woodcrest, Dempsey, and Itanium2, the Cell is approximately 8.8x, 11.6x, and 12.8x faster, respectively. Our preliminary analysis shows that the Cell can also accelerate the dynamics component (~;;25percent total computational time). We believe these dramatic performance improvements make the Cell processor very competitive as an accelerator.

Zhou, Shujia; Duffy, Daniel; Clune, Thomas; Suarez, Max; Williams, Samuel; Halem, Milton

2009-01-10T23:59:59.000Z

345

Modeling-Computer Simulations At Northern Basin & Range Region (Blackwell,  

Open Energy Info (EERE)

Northern Basin & Northern Basin & Range Region (Blackwell, Et Al., 2003) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Developed natural state mass and energy transport fluid flow models of generic Basin and Range systems based on Dixie Valley data that help to understand the nature of large scale constraints on the location and characteristics of the geothermal systems References D. D. Blackwell, K. W. Wisian, M. C. Richards, Mark Leidig, Richard Smith, Jason McKenna (2003) Geothermal Resource Analysis And Structure Of Basin And Range Systems, Especially Dixie Valley Geothermal Field, Nevada Retrieved from "http://en.openei.org/w/index.php?title=Modeling-Computer_Simulations_At_Northern_Basin_%26_Range_Region_(Blackwell,_Et_Al.,_2003)&oldid=401422

346

Modeling-Computer Simulations At Kilauea East Rift Area (Rudman & Epp,  

Open Energy Info (EERE)

Rudman & Epp, Rudman & Epp, 1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Kilauea East Rift Area (Rudman & Epp, 1983) Exploration Activity Details Location Kilauea East Rift Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Three models were generated: a constant temperature source from a vertical dike; a constant heat-generating magma chamber; and a transient heat source from a tapered vertical dike. Fair correlation is obtained between the HGP-A well temperature and the tapered dike 125 years after it is injected with an initial (transient) 1200degrees C temperature. Results provide background information from which to evaluate the importance of water

347

Modeling-Computer Simulations At Long Valley Caldera Area (Farrar, Et Al.,  

Open Energy Info (EERE)

3) 3) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Modeling-Computer Simulations At Long Valley Caldera Area (Farrar, Et Al., 2003) Exploration Activity Details Location Long Valley Caldera Area Exploration Technique Modeling-Computer Simulations Activity Date Usefulness useful DOE-funding Unknown Notes Modeling of both deformation and microgravity data now suggests that (1) there are two inflation sources beneath the caldera, a shallower source 7^10 km beneath the resurgent dome and a deeper source V15 km beneath the caldera's south moat and (2) the shallower source may contain components of magmatic brine and gas. At shallow depths in the caldera References Christopher D. Farrar, Michael L. Sorey, Evelyn Roeloffs, Devin L.

348

High Performance Computing Modeling Advances Accelerator Science for High Energy Physics  

SciTech Connect

The development and optimization of particle accelerators are essential for advancing our understanding of the properties of matter, energy, space and time. Particle accelerators are complex devices whose behavior involves many physical effects on multiple scales. Therefore, advanced computational tools utilizing high-performance computing (HPC) are essential for accurately modeling them. In the past decade, the DOE SciDAC program has produced such accelerator-modeling tools, which have beem employed to tackle some of the most difficult accelerator science problems. In this article we discuss the Synergia beam-dynamics framework and its applications to high-intensity particle accelerator physics. Synergia is an accelerator simulation package capable of handling the entire spectrum of beam dynamics simulations. We present the design principles, key physical and numerical models in Synergia and its performance on HPC platforms. Finally, we present the results of Synergia applications for the Fermilab proton source upgrade, known as the Proton Improvement Plan (PIP).

Amundson, James; Macridin, Alexandru; Spentzouris, Panagiotis

2014-04-29T23:59:59.000Z

349

A depth-averaged debris-flow model that includes the effects of evolving dilatancy. II. Numerical predictions and experimental tests  

Science Journals Connector (OSTI)

...satisfies numerical conservation by using a similarity...details). Numerical conservation of quantities transported...include a motionless pool of water lying over variable...2003 Shallow-water theory for arbitrary...1960 Systems of conservation laws. Comm. Pure...

2014-01-01T23:59:59.000Z

350

Experimental and computational investigation of end-milling and development of a simulation model describing the machining process  

E-Print Network (OSTI)

1 Experimental and computational investigation of end-milling and development of a simulation model simulation model, which allows the selection of optimum cutting conditions in end-milling processes, taking

Aristomenis, Antoniadis

351

Analysis of the Newphew/Spore model for determining costs of coal mining in Appalachia. Computer model study. Final report  

SciTech Connect

The purpose of the study was primarily to determine whether a computer program developed to determine the costs of coal surface mining and reclamation in Appalachia was capable of being responsive to the needs of the Office of Surface Mining for projecting the extraction costs of coal in support of the Small Operator Assistance Program. The study analysis validated the model and adapted it to specific small operator needs in terms of user flexibility. It found that the model as originally programmed was subject to a number of limitations and functional constraints. Although a substantial loosening of these constraints was not feasible within the current scope of work, it did establish an approach to reprogram the model to take into account dynamically certain previously static aspects of the model. The approach was implemented in order to made the model more useful and to establish a baseline for future development.

Nephew, E.A.; Spore, R.L.

1980-06-06T23:59:59.000Z

352

On the Use of Computational Models for Wave Climate Assessment in Support of the Wave Energy Industry  

E-Print Network (OSTI)

On the Use of Computational Models for Wave Climate Assessment in Support of the Wave Energy On the Use of Computational Models for Wave Climate Assessment in Support of the Wave Energy Industry Effective, economic extraction of ocean wave energy requires an intimate under- standing of the ocean wave

Victoria, University of

353

Coupled Boltzmann computation of mixed axion neutralino dark matter in the SUSY DFSZ axion model  

E-Print Network (OSTI)

The supersymmetrized DFSZ axion model is highly motivated not only because it offers solutions to both the gauge hierarchy and strong CP problems, but also because it provides a solution to the SUSY mu problem which naturally allows for a Little Hierarchy. We compute the expected mixed axion-neutralino dark matter abundance for the SUSY DFSZ axion model in two benchmark cases-- a natural SUSY model with a standard neutralino underabundance (SUA) and an mSUGRA/CMSSM model with a standard overabundance (SOA). Our computation implements coupled Boltzmann equations which track the radiation density along with neutralino, axion (produced thermally (TH) and via coherent oscillations (CO)), saxion (TH- and CO-produced), axino and gravitino densities. In the SUSY DFSZ model, axions, axinos and saxions go through the process of freeze-in-- in contrast to freeze-out or out-of-equilibrium production as in the SUSY KSVZ model-- resulting in thermal yields which are largely independent of the re-heat temperature. We find the SUA case with suppressed saxion-axion couplings (\\xi=0) only admits solutions for PQ breaking scale f_a~radiation or violation of BBN constraints. An exception occurs at very large f_a~ 10^{15}-10^{16} GeV where large entropy dilution from CO-produced saxions leads to allowed models.

Kyu Jung Bae; Howard Baer; Andre Lessa; Hasan Serce

2014-06-16T23:59:59.000Z

354

Modeling of the Aging Viscoelastic Properties of Cement Paste Using Computational Methods  

E-Print Network (OSTI)

Results from the Dissolution-Formation Viscoelastic Program, the NISTIR ELAS3D Program and the Abaqus Program ............................................................................................................ 38 Figure 14 Comparison... with an existent aging viscoelastic model which has some limitations in predicting the behavior of cement paste. Overview of the three dimensional linear elastic model ELAS3D is also included in this chapter. Chapter 3 develops the dissolution...

Li, Xiaodan

2012-07-16T23:59:59.000Z

355

Remaining useful life estimates of a PEM fuel cell stack by including characterization-induced disturbances in a particle filter model  

E-Print Network (OSTI)

Remaining useful life estimates of a PEM fuel cell stack by including characterization- induced Besançon, France rgourive@ens2m.fr ABSTRACT: Proton Exchange Membrane Fuel Cells (PEMFC) are available, Prognostics, Remaining Useful life, Particle filter 1. Introduction Proton Exchange Membrane Fuel Cells

Paris-Sud XI, Université de

356

Marine and Hydrokinetic Technology (MHK) Instrumentation, Measurement, and Computer Modeling Workshop  

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

Marine and Hydrokinetic Marine and Hydrokinetic Technology (MHK) Instrumentation, Measurement, and Computer Modeling Workshop W. Musial, M. Lawson, and S. Rooney National Renewable Energy Laboratory Technical Report NREL/TP-5000-57605 February 2013 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 15013 Denver West Parkway Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Marine and Hydrokinetic Technology (MHK) Instrumentation, Measurement, and Computer Modeling Workshop W. Musial, M. Lawson, and S. Rooney National Renewable Energy Laboratory Prepared under Task No. WA09.3406

357

A New Framework for a Model-Based Data Science Computational Platform  

E-Print Network (OSTI)

Astronomy produces extremely large data sets from ground-based telescopes, space missions, and simulation. The volume and complexity of these rich data sets require new approaches and advanced tools to understand the information contained therein. No one can load this data on their own computer, most cannot even keep it at their institution, and worse, no platform exists that allows one to evaluate their models across the whole of the data. Simply having an extremely large volume of data available in one place is not sufficient; one must be able to make valid, rigorous, scientific comparisons across very different data sets from very different instrumentation. We propose a framework to directly address this which has the following components: a model-based computational platform, streamlined access to large volumes of data, and an educational and social platform for both researchers and the public.

Muna, Demitri

2014-01-01T23:59:59.000Z

358

A depth-averaged debris-flow model that includes the effects of evolving dilatancy. II. Numerical predictions and experimental tests  

Science Journals Connector (OSTI)

...Numerical predictions and experimental tests David L. George Richard M. Iverson e-mail...software package we call D-Claw. As tests of D-Claw, we compare model output with...our numerical solution technique, and tests of numerical predictions against experimental...

2014-01-01T23:59:59.000Z

359

NREL Computer Models Integrate Wind Turbines with Floating Platforms (Fact Sheet)  

SciTech Connect

Far off the shores of energy-hungry coastal cities, powerful winds blow over the open ocean, where the water is too deep for today's seabed-mounted offshore wind turbines. For the United States to tap into these vast offshore wind energy resources, wind turbines must be mounted on floating platforms to be cost effective. Researchers at the National Renewable Energy Laboratory (NREL) are supporting that development with computer models that allow detailed analyses of such floating wind turbines.

Not Available

2011-07-01T23:59:59.000Z

360

SuperComputing | Mathematics | ORNL  

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

Discrete Math Kinetic Theory Linear Algebra Solvers Uncertainty Quantification National Security Systems Modeling Engineering Analysis Behavioral Sciences Geographic Information Science and Technology Quantum Information Science Supercomputing and Computation Home | Science & Discovery | Supercomputing and Computation | Research Areas | Mathematics SHARE Mathematics The Computational Mathematics activities include the developing and deploying computational and applied mathematical capabilities for modeling, simulating, and predicting complex phenomena of importantance to the Department of Energy (DOE). A particular focus is on developing novel scalable algorithms for exploiting novel high performance computing resources for scientific discovery as well as decision-sciences.

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


361

Vehicle Technologies Office Merit Review 2014: Significant Enhancement of Computational Efficiency in Nonlinear Multiscale Battery Model for Computer Aided Engineering  

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

Presentation given by NREL at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about significant enhancement of computational...

362

Spectroscopy, modeling and computation of metal chelate solubility in supercritical CO{sub 2}  

SciTech Connect

The overall objectives of this project were to gain a fundamental understanding of the solubility and phase behavior of metal chelates in supercritical CO{sub 2}. Extraction with CO{sub 2} is an excellent way to remove organic compounds from soils, sludges and aqueous solutions, and recent research has demonstrated that, together with chelating agents, it is a viable way to remove metals, as well. In this project the authors sought to gain fundamental knowledge that is vital to computing phase behavior, and modeling and designing processes using CO{sub 2} to separate organics and metal compounds from DOE mixed wastes. The overall program was a comprehensive one to measure, model and compute the solubility of metal chelate complexes in supercritical CO{sub 2} and CO{sub 2}/cosolvent mixtures. Through a combination of phase behavior measurements, spectroscopy and the development of a new computational technique, the authors have achieved a completely reliable way to model metal chelate solubility in supercritical CO{sub 2} and CO{sub 2}/co-contaminant mixtures. Thus, they can now design and optimize processes to extract metals from solid matrices using supercritical CO{sub 2}, as an alternative to hazardous organic solvents that create their own environmental problems, even while helping in metals decontamination.

J. F. Brennecke; M. A. Stadtherr

1999-12-10T23:59:59.000Z

363

Modeling of reactor components using FIDAP: a finite element computer code  

E-Print Network (OSTI)

. ? e model are listed in table 1. 19 CHAPTER III FLUID AND THERMAL MIXING IN THE COLD LEG AND DOWNCOMER OF A PWR - A BENCHMARK In order to vahdste the code FIDAP, s, thermal mixing experiment is simulated This is basically a test of the field...MODELING OF REACTOR COMPONENTS USING FIDAP - A FINITE ELEMENT COMPUTE& CODE A Thesrs by ANAND GANGADHARAN Subnutted to the Office of Graduate Stuches of Texs, s ARM University in partial fulfillment of the requirements for the degree...

Gangadharan, Anand

2012-06-07T23:59:59.000Z

364

Physical modeling and computer graphic simulation of the depletion of world energy reserve  

Science Journals Connector (OSTI)

A physical modeling device and a computer graphic simulation program of the depletion of world energy reserve are developed to demonstrate how rapidly our energy reserve is depleted, how quickly and enormously our demands for energy grows, and how important energy conservation is to us. In both modeling and simulation cases, the total world energy reserve, the current energy usage annual growth rate, and the current energy consumption rate are given as parameters. One can view the energy shortage in terms of the rapidly falling levels in the physical water tank or the simulated oil barrels.

Chih Wu

1981-01-01T23:59:59.000Z

365

Software Engineering Model Schedule -(with CS 1131) example only; actual schedule may vary; see your academic dept. Includes 3 units of co-curricular activities.  

E-Print Network (OSTI)

Software Engineering Model Schedule - (with CS 1131) example only; actual schedule may vary; see FALL SPRING FALL SPRING CS 1000 1 CS 2321 3 CS 1141 2 CS 3141 3 CS 1131 5 MA 2160 4 CS 2311 3 CS 3421 4 Activity (1) Total 17 Total 15 Total 14-15 Total 16-17 3rd Year 4th Year FALL SPRING FALL SPRING CS 3311 3

366

Software Engineering Model Schedule -(Starting with CS 1121) example only; actual schedule may vary; see your academic dept. Includes 3 units of co-curricular activities.  

E-Print Network (OSTI)

Software Engineering Model Schedule - (Starting with CS 1121) example only; actual schedule may Year 2nd Year FALL SPRING FALL SPRING CS 1000 1 CS 1122 3 CS 1141 2 CS 2311 3 CS 1121 3 MA 2160 4 CS Cocurricular Activity (1) Total 15 Total 15 Total 14-15 Total 16-17 3rd Year 4th Year FALL SPRING FALL SPRING

367

Three-Dimensional Computational Fluid Dynamics Modeling of Solid Oxide Electrolysis Cells and Stacks  

SciTech Connect

A three-dimensional computational fluid dynamics (CFD) electrochemical model has been created for detailed analysis of a high-temperature electrolysis stack (solid oxide fuel cells operated as electrolyzers). Inlet and outlet plenum flow distributions are discussed. Maldistribution of plena flow show deviations in per-cell operating conditions due to non-uniformity of species concentrations. Models have also been created to simulate experimental conditions and for code validation. Comparisons between model predictions and experimental results are discussed. 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 electrolysis 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. Predicted mean outlet hydrogen and steam concentrations vary linearly with current density, as expected. 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.

Grant Hawkes; James O'Brien; Carl Stoots; Stephen Herring

2008-07-01T23:59:59.000Z

368

Unit physics performance of a mix model in Eulerian fluid computations  

SciTech Connect

In this report, we evaluate the performance of a K-L drag-buoyancy mix model, described in a reference study by Dimonte-Tipton [1] hereafter denoted as [D-T]. The model was implemented in an Eulerian multi-material AMR code, and the results are discussed here for a series of unit physics tests. The tests were chosen to calibrate the model coefficients against empirical data, principally from RT (Rayleigh-Taylor) and RM (Richtmyer-Meshkov) experiments, and the present results are compared to experiments and to results reported in [D-T]. Results show the Eulerian implementation of the mix model agrees well with expectations for test problems in which there is no convective flow of the mass averaged fluid, i.e., in RT mix or in the decay of homogeneous isotropic turbulence (HIT). In RM shock-driven mix, the mix layer moves through the Eulerian computational grid, and there are differences with the previous results computed in a Lagrange frame [D-T]. The differences are attributed to the mass averaged fluid motion and examined in detail. Shock and re-shock mix are not well matched simultaneously. Results are also presented and discussed regarding model sensitivity to coefficient values and to initial conditions (IC), grid convergence, and the generation of atomically mixed volume fractions.

Vold, Erik [Los Alamos National Laboratory; Douglass, Rod [Los Alamos National Laboratory

2011-01-25T23:59:59.000Z

369

Steam-Methane Reformer Kinetic Computer Model with Heat Transfer and Geometry Options  

SciTech Connect

A kinetic computer model of a steam/methane reformer has been developed as a design and analytical tool for a fuel cell system's fuel conditioner. This model has reaction, geometry, flow arrangement, and heat transfer options. Model predictions have been compared to previous experimental data, and close agreement was obtained. Initially, the Leva-type, packed-bed, heat transfer correlations were used. However, calculations based upon the reacting, reformer gases indicate a considerably higher heat transfer coefficient for this reforme design. Data analysis from similar designs in the literature also shows this phenomenon. This is thought to be reaction-induced effect, brought about by the changing of gas composition, the increased gas velocity, the lower catalyst temperature during reaction, and the higher thermal and reaction gradients involved in compact fuel cell reformer designs. Future experimental work is planned to verify the model's predictions further.

Murray, A.P.; Snyder, T.S.

1985-04-01T23:59:59.000Z

370

Computational fluid dynamics modeling of coal gasification in a pressurized spout-fluid bed  

SciTech Connect

Computational fluid dynamics (CFD) modeling, which has recently proven to be an effective means of analysis and optimization of energy-conversion processes, has been extended to coal gasification in this paper. A 3D mathematical model has been developed to simulate the coal gasification process in a pressurized spout-fluid bed. This CFD model is composed of gas-solid hydrodynamics, coal pyrolysis, char gasification, and gas phase reaction submodels. The rates of heterogeneous reactions are determined by combining Arrhenius rate and diffusion rate. The homogeneous reactions of gas phase can be treated as secondary reactions. A comparison of the calculated and experimental data shows that most gasification performance parameters can be predicted accurately. This good agreement indicates that CFD modeling can be used for complex fluidized beds coal gasification processes. 37 refs., 7 figs., 5 tabs.

Zhongyi Deng; Rui Xiao; Baosheng Jin; He Huang; Laihong Shen; Qilei Song; Qianjun Li [Southeast University, Nanjing (China). Key Laboratory of Clean Coal Power Generation and Combustion Technology of Ministry of Education

2008-05-15T23:59:59.000Z

371

Computational modelling of transport phenomena in high energy materials processing application: large eddy simulation and parallelisation  

Science Journals Connector (OSTI)

A comprehensive three-dimensional numerical model is presented in order to address the coupled turbulent momentum, heat and species transport during molten metal-pool convection in association with continuous evolution of solid-liquid interface typically encountered in high energy materials processing applications. The turbulent aspect is handled by a large eddy simulation (LES) model and the phase changing phenomena is taken care of by a modified enthalpy-porosity technique. The proposed finite volume based LES model is subsequently parallelised for effective computational economy. To demonstrate the effectiveness of the present model, a systematic analysis is subsequently carried out to simulate a typical high power laser surface alloying process, where the effects of turbulent transport can actually be realised.

Dipankar Chatterjee

2011-01-01T23:59:59.000Z

372

Intro Integrals of Motion and S Matrix Computation of Masses and S Matrix of Magnetic Critical Ising Model Conclusion Solving 2D Magnetic Ising Model at T = Tc  

E-Print Network (OSTI)

Ising Model Conclusion Solving 2D Magnetic Ising Model at T = Tc Using Scattering Theory Jihye Seo High, Harvard University Solving 2D Magnetic Ising Model at T = Tc Using Scattering Theory 1 / 28 #12;Intro Integrals of Motion and S Matrix Computation of Masses and S Matrix of Magnetic Critical Ising Model

373

Computer modeling of infrared head-on emission from missile noses  

SciTech Connect

A computer model that takes into account the effect of aerodynamic and solar heating, sky irradiation, and radiative cooling on infrared emission from missile noses is presented. The heat transfer equation was solved with numerical techniques both in the steady-state (constant sped and altitude flight of cruise missiles) and in the nonstationary regime (quickly variable speed and altitude of short to medium range ballistic missiles) to give the temperature distribution on the skin surface. The corresponding head-on absolute infrared emission in the 3 to 5 {mu}m spectral bands was computed as a function of time of flight and missile altitude. Results show a strong dependence of temperature on the skin material, on the character of the aerodynamic flow (laminar or turbulent boundary layer), and on the physical characteristics of the atmosphere. By varying these parameters into reasonable ranges, infrared emissions spanning over more than an order of magnitude were obtained.

Tofani, A. (Officine Galileo SpA, Via Einstein 35, 50013 Campi Bisenzio, Florence (IT))

1990-02-01T23:59:59.000Z

374

Computational Fluid Dynamics (CFD) Modeling for High Rate Pulverized Coal Injection (PCI) into the Blast Furnace  

SciTech Connect

Pulverized coal injection (PCI) into the blast furnace (BF) has been recognized as an effective way to decrease the coke and total energy consumption along with minimization of environmental impacts. However, increasing the amount of coal injected into the BF is currently limited by the lack of knowledge of some issues related to the process. It is therefore important to understand the complex physical and chemical phenomena in the PCI process. Due to the difficulty in attaining trus BF measurements, Computational fluid dynamics (CFD) modeling has been identified as a useful technology to provide such knowledge. CFD simulation is powerful for providing detailed information on flow properties and performing parametric studies for process design and optimization. In this project, comprehensive 3-D CFD models have been developed to simulate the PCI process under actual furnace conditions. These models provide raceway size and flow property distributions. The results have provided guidance for optimizing the PCI process.

Dr. Chenn Zhou

2008-10-15T23:59:59.000Z

375

Yuening Hu and Jordan Boyd-Graber. Efficient Tree-Based Topic Modeling. Association for Computational Lin-guistics, 2012.  

E-Print Network (OSTI)

Yuening Hu and Jordan Boyd-Graber. Efficient Tree-Based Topic Modeling. Association for Computational Lin- guistics, 2012. @inproceedings{Hu:Boyd-Graber-2012, Author = {Yuening Hu and Jordan Boyd Department of Computer Science University of Maryland, College Park ynhu@cs.umd.edu Jordan Boyd-Graber i

Boyd-Graber, Jordan

376

Computational Science Technical Note CSTN-108 Visualising spins and clusters in regular and small-world Ising models with GPUs  

E-Print Network (OSTI)

-world Ising models with GPUs Arno Leist and Daniel P. Playne and K. A. Hawick 2010 Visualising computational and explanatory techniques for computtaional simulation models such as the Ising model in three dimensions pathlength shortening and other changes to the Ising system when small-world link rewiring is applied

Hawick, Ken

377

Computational Science Technical Note CSTN-163 Transients in a Forest-Fire Simulation Model with Varying Combustion  

E-Print Network (OSTI)

to the model system. KEY WORDS fire-model; simulation; dynamics; fire-break; transient; cy- cles. 10 Computational Science Technical Note CSTN-163 Transients in a Forest-Fire Simulation Model and the eect of a fractal watercourse introduced into the system is investigated. The presence of the water

Hawick, Ken

378

Computational Science Technical Note CSTN-147 Visual Simulation of a Multi-Species Coloured Lattice Gas Model  

E-Print Network (OSTI)

Lattice Gas Model T. S. Lyes and M. G. B. Johnson and K. A. Hawick 2012 Understanding complex fluid flow describe how a coloured lattice gas model was developed and run on a graphical processing unit using NVIDIA Gas Model}, booktitle = {Proc. Int. Conf. on Scientific Computing (CSC'12)}, year = {2012}, pages

Hawick, Ken

379

Daylighting Analysis through Scale Model, Full Scale Measurements and Computer Analysis for a Texas A&M University Campus Building  

E-Print Network (OSTI)

In the first part of this study, daylighting levles in an actualy classroom are compared to scale model measurements and to computer program predictions. Secondly, the daylighting effects in the building atrium are examined through the studies...

Kim, K. S.; Boyer, L. L.; Degelman, L. O.

1985-01-01T23:59:59.000Z

380

A Quantitative Comparison of Parallel Computation Models Ben H,H. Juurlink Harry A.G. Wijshoff  

E-Print Network (OSTI)

A Quantitative Comparison of Parallel Computation Models Ben H,H. Juurlink Harry A.G. Wijshoff High, requires specific permission sad/or fee. SPM96, Padua, Italy Q 199(j ACM ().89791+@-&96j~ ..$3

Moreno Maza, Marc

Note: This page contains sample records for the topic "including computer modeling" 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

Enabling a Highly-Scalable Global Address Space Model for Petascale Computing  

SciTech Connect

Over the past decade, the trajectory to the petascale has been built on increased complexity and scale of the underlying parallel architectures. Meanwhile, software de- velopers have struggled to provide tools that maintain the productivity of computational science teams using these new systems. In this regard, Global Address Space (GAS) programming models provide a straightforward and easy to use addressing model, which can lead to improved produc- tivity. However, the scalability of GAS depends directly on the design and implementation of the runtime system on the target petascale distributed-memory architecture. In this paper, we describe the design, implementation, and optimization of the Aggregate Remote Memory Copy Interface (ARMCI) runtime library on the Cray XT5 2.3 PetaFLOPs computer at Oak Ridge National Laboratory. We optimized our implementation with the flow intimation technique that we have introduced in this paper. Our optimized ARMCI implementation improves scalability of both the Global Arrays (GA) programming model and a real-world chemistry application NWChem from small jobs up through 180,000 cores.

Apra, Edoardo [ORNL; Vetter, Jeffrey S [ORNL; Yu, Weikuan [ORNL

2010-01-01T23:59:59.000Z

382

United: How one computer model makes Texas surface water management possible  

E-Print Network (OSTI)

Story by Leslie Lee Summer 2013 tx H2O 3 Photo by Kathleen Phillips, Texas A&M AgriLife UNITED How one computer model makes Texas surface water management possible Managing surface water supplies in Texas is complex, to say the least. Multiple... of conditions. W#15;P enables surface water managers throughout Texas to allocate water resources, plan for the future and ensure there is enough water for environmental as well as human needs. A statewide surface water permitting system is born Prior...

Lee, Leslie

2013-01-01T23:59:59.000Z

383

Computational upscaled modeling of heterogeneous porous media flow utilizing finite volume method  

E-Print Network (OSTI)

-Gupta (Member) Al Boggess (Head of Department) May 2004 Major Subject: Mathematics iii ABSTRACT Computational Upscaled Modeling of Heterogeneous Porous Media Flow Utilizing Finite Volume Method. (May 2004) Victor Eralingga Ginting, B.S., Institute of Technology... of L2 norm of solution error for =h = 0:64, and n = 16. 39 3.6 Comparison of L2 norm of solution error for N = 32. : : : : : : : : : 39 3.7 Results for anisotropic case, lx1 = 0:40, lx2 = 0:01, = 1:0. : : : : : : 41 3.8 Results for anisotropic case...

Ginting, Victor Eralingga

2005-08-29T23:59:59.000Z

384

Reversible jump Markov chain Monte Carlo computation and Bayesian model determination  

E-Print Network (OSTI)

Markov chain Monte Carlo methods for Bayesian computation have until recently been restricted to problems where the joint distribution of all variables has a density with respect to some xed standard underlying measure. They have therefore not been available for application to Bayesian model determination, where the dimensionality of the parameter vector is typically not xed. This article proposes a new framework for the construction of reversible Markov chain samplers that jump between parameter subspaces of di ering dimensionality, which is exible and entirely constructive. It should therefore have wide applicability in model determination problems. The methodology is illustrated with applications to multiple change-point analysis in one and two dimensions, and toaBayesian comparison of binomial experiments.

Peter J. Green

1995-01-01T23:59:59.000Z

385

Physical and Computational Modeling for Chemical and Biological Weapons Airflow Applications  

SciTech Connect

There is a need for information on dispersion and infiltration of chemical and biological agents in complex building environments. A recent collaborative study conducted at the Idaho National Engineering and Environmental Laboratory (INEEL) and Bechtel Corporation Research and Development had the objective of assessing computational fluid dynamics (CFD) models for simulation of flow around complicated buildings through a comparison of experimental and numerical results. The test facility used in the experiments was INEEL’s unique large Matched-Index-of-Refraction (MIR) flow system. The CFD code used for modeling was Fluent, a widely available commercial flow simulation package. For the experiment, a building plan was selected to approximately represent an existing facility. It was found that predicted velocity profiles from above the building and in front of the building were in good agreement with the measurements.

McEligot, Donald Marinus; Mc Creery, Glenn Ernest; Pink, Robert John; Barringer, C.; Knight, K. J.

2002-11-01T23:59:59.000Z

386

Three-dimensional Computational Fluid Dynamics (CFD) modeling of dry spent nuclear fuel storage canisters  

SciTech Connect

One of the interim storage configurations being considered for aluminum-clad foreign research reactor fuel, such as the Material and Testing Reactor (MTR) design, is in a dry storage facility. To support design studies of storage options, a computational and experimental program was conducted at the Savannah River Site (SRS). The objective was to develop computational fluid dynamics (CFD) models which would be benchmarked using data obtained from a full scale heat transfer experiment conducted in the SRS Experimental Thermal Fluids Laboratory. The current work documents the CFD approach and presents comparison of results with experimental data. CFDS-FLOW3D (version 3.3) CFD code has been used to model the 3-dimensional convective velocity and temperature distributions within a single dry storage canister of MTR fuel elements. For the present analysis, the Boussinesq approximation was used for the consideration of buoyancy-driven natural convection. Comparison of the CFD code can be used to predict reasonably accurate flow and thermal behavior of a typical foreign research reactor fuel stored in a dry storage facility.

Lee, S.Y.

1997-06-01T23:59:59.000Z

387

Modeling the System: How Computers are Used in Columbia River Planning.  

SciTech Connect

This publication describes the three computer models Federal agencies and the Northwest Power Pool use regularly to help plan hydro operations in the Columbia River Basin: HYSSR, HYDROSIM, and HYDREG. It is one of a series of booklets written for participants in the System Operation Review (SOR) being conducted jointly by the US Army Corps of Engineers (Corps), the US Bureau of Reclamation (Reclamation), and theBonneville Power Administration (BPA). A list of the other publications appears on the inside front cover. The SOR is the environmental analysis required to consider changes in Columbia River system operations related contract arrangements. Over the next few years, the agencies will develop a new multiple-use operation for the Columbia River. At the time, the Pacific Northwest Coordination Agreement (PNCA) and other contracts related to the Columbia River Treaty between the United States and Canada will be renegotiated and renewed. Many alternative ways of operating individual projects and the river system as a whole will be considered in the SOR. To analyze how these changes would affect the system's ability to meet its multiple-use goals, various operating scenarios will be thoroughly evaluated. The three computer models, HYSSR, HYDROSIM, and HYDREG, will play an important role in this evaluation.

United States. Bonneville Power Administration; United States. Army Corps of Engineers; United States. Bureau of Reclamation

1992-10-01T23:59:59.000Z

388

Promise and challenge of high-performance computing, with examples from molecular modelling  

Science Journals Connector (OSTI)

...Issue New science from high-performance computing organized by Richard Catlow...Promise and challenge of high-performance computing, with examples from molecular...the benefits offered by high-performance computing. The task will not be...

2002-01-01T23:59:59.000Z

389

Information regarding previous INCITE awards including selected highlights  

Office of Science (SC) Website

Information regarding previous INCITE awards including selected highlights Advanced Scientific Computing Research (ASCR) ASCR Home About Research Facilities Accessing ASCR Supercomputers Oak Ridge Leadership Computing Facility (OLCF) Argonne Leadership Computing Facility (ALCF) National Energy Research Scientific Computing Center (NERSC) Energy Sciences Network (ESnet) Research & Evaluation Prototypes (REP) Innovative & Novel Computational Impact on Theory and Experiment (INCITE) ASCR Leadership Computing Challenge (ALCC) Science Highlights Benefits of ASCR Funding Opportunities Advanced Scientific Computing Advisory Committee (ASCAC) News & Resources Contact Information Advanced Scientific Computing Research U.S. Department of Energy SC-21/Germantown Building

390

Economic Model For a Return on Investment Analysis of United States Government High Performance Computing (HPC) Research and Development (R & D) Investment  

SciTech Connect

This study investigated how high-performance computing (HPC) investments can improve economic success and increase scientific innovation. This research focused on the common good and provided uses for DOE, other government agencies, industry, and academia. The study created two unique economic models and an innovation index: 1 A macroeconomic model that depicts the way HPC investments result in economic advancements in the form of ROI in revenue (GDP), profits (and cost savings), and jobs. 2 A macroeconomic model that depicts the way HPC investments result in basic and applied innovations, looking at variations by sector, industry, country, and organization size. ? A new innovation index that provides a means of measuring and comparing innovation levels. Key findings of the pilot study include: IDC collected the required data across a broad set of organizations, with enough detail to create these models and the innovation index. The research also developed an expansive list of HPC success stories.

Joseph, Earl C.; Conway, Steve; Dekate, Chirag

2013-09-30T23:59:59.000Z

391

GASFLOW: A computational model to analyze accidents in nuclear containment and facility buildings  

SciTech Connect

GASFLOW is a finite-volume computer code that solves the time-dependent, compressible Navier-Stokes equations for multiple gas species. The fluid-dynamics algorithm is coupled to the chemical kinetics of combusting liquids or gases to simulate diffusion or propagating flames in complex geometries of nuclear containment or confinement and facilities` buildings. Fluid turbulence is calculated to enhance the transport and mixing of gases in rooms and volumes that may be connected by a ventilation system. The ventilation system may consist of extensive ductwork, filters, dampers or valves, and fans. Condensation and heat transfer to walls, floors, ceilings, and internal structures are calculated to model the appropriate energy sinks. Solid and liquid aerosol behavior is simulated to give the time and space inventory of radionuclides. The solution procedure of the governing equations is a modified Los Alamos ICE`d-ALE methodology. Complex facilities can be represented by separate computational domains (multiblocks) that communicate through overlapping boundary conditions. The ventilation system is superimposed throughout the multiblock mesh. Gas mixtures and aerosols are transported through the free three-dimensional volumes and the restricted one-dimensional ventilation components as the accident and fluid flow fields evolve. Combustion may occur if sufficient fuel and reactant or oxidizer are present and have an ignition source. Pressure and thermal loads on the building, structural components, and safety-related equipment can be determined for specific accident scenarios. GASFLOW calculations have been compared with large oil-pool fire tests in the 1986 HDR containment test T52.14, which is a 3000-kW fire experiment. The computed results are in good agreement with the observed data.

Travis, J.R. [Science Applications International Corp., Albuquerque, NM (United States); Nichols, B.D.; Wilson, T.L.; Lam, K.L.; Spore, J.W.; Niederauer, G.F. [Los Alamos National Lab., NM (United States)

1993-07-01T23:59:59.000Z

392

GASFLOW: A computational model to analyze accidents in nuclear containment and facility buildings  

SciTech Connect

GASFLOW is a finite-volume computer code that solves the time-dependent, compressible Navier-Stokes equations for multiple gas species. The fluid-dynamics algorithm is coupled to the chemical kinetics of combusting liquids or gases to simulate diffusion or propagating flames in complex geometries of nuclear containment or confinement and facilities' buildings. Fluid turbulence is calculated to enhance the transport and mixing of gases in rooms and volumes that may be connected by a ventilation system. The ventilation system may consist of extensive ductwork, filters, dampers or valves, and fans. Condensation and heat transfer to walls, floors, ceilings, and internal structures are calculated to model the appropriate energy sinks. Solid and liquid aerosol behavior is simulated to give the time and space inventory of radionuclides. The solution procedure of the governing equations is a modified Los Alamos ICE'd-ALE methodology. Complex facilities can be represented by separate computational domains (multiblocks) that communicate through overlapping boundary conditions. The ventilation system is superimposed throughout the multiblock mesh. Gas mixtures and aerosols are transported through the free three-dimensional volumes and the restricted one-dimensional ventilation components as the accident and fluid flow fields evolve. Combustion may occur if sufficient fuel and reactant or oxidizer are present and have an ignition source. Pressure and thermal loads on the building, structural components, and safety-related equipment can be determined for specific accident scenarios. GASFLOW calculations have been compared with large oil-pool fire tests in the 1986 HDR containment test T52.14, which is a 3000-kW fire experiment. The computed results are in good agreement with the observed data.

Travis, J.R. (Science Applications International Corp., Albuquerque, NM (United States)); Nichols, B.D.; Wilson, T.L.; Lam, K.L.; Spore, J.W.; Niederauer, G.F. (Los Alamos National Lab., NM (United States))

1993-01-01T23:59:59.000Z

393

Vladimir Eidelman, Jordan Boyd-Graber, and Philip Resnik. Topic Models for Dynamic Translation Model Adaptation. Association for Computational Linguistics, 2012.  

E-Print Network (OSTI)

Vladimir Eidelman, Jordan Boyd-Graber, and Philip Resnik. Topic Models for Dynamic Translation Model Adaptation. Association for Computational Linguistics, 2012. @inproceedings{Eidelman:Boyd-Graber:Resnik-2012, Author = {Vladimir Eidelman and Jordan Boyd-Graber and Philip Resnik}, Booktitle = {Association

Boyd-Graber, Jordan

394

Computational analysis of flow field around Ahmed car model passing underneath a flyover  

Science Journals Connector (OSTI)

A flow structure around a ground vehicle has been studied by many researchers using numerous methods either computational or experimental. However no analysis of flow field generated by a car passing under a flyover has been carried out. One of the famous simplified models of a car is the Ahmed body that has been established to investigate the influence of the flow structure on the drag. In this paper we investigate a flow field around Ahmed body of a single cruising condition as the vehicle passes under a flyover using a computational method with RANS equation. The main objective of this paper is to evaluate the turbulence kinetic energy and velocity magnitude developed within the wall boundary created by the flyover to the air flow field that is generated by the Ahmed reference car. It was observed that the simulated airflow passes the vehicle was bounded by the wall of the flyover and consequently changes the pattern of the flow field. Understanding the characteristic of this flow field under a flyover is essential if one wants to maximize the recovery of the dissipated energy which for example can be used to power a small vertical-axis wind turbine to produce and store electrical energy for lighting under the flyover.

Md Nor Musa; Kahar Osman; Ab Malik A. Hamat

2012-01-01T23:59:59.000Z

395

A spatially-distributed computational model to quantify behaviour of contrast agents in MR perfusion imaging  

Science Journals Connector (OSTI)

Abstract Contrast agent enhanced magnetic resonance (MR) perfusion imaging provides an early, non-invasive indication of defects in the coronary circulation. However, the large variation of contrast agent properties, physiological state and imaging protocols means that optimisation of image acquisition is difficult to achieve. This situation motivates the development of a computational framework that, in turn, enables the efficient mapping of this parameter space to provide valuable information for optimisation of perfusion imaging in the clinical context. For this purpose a single-compartment porous medium model of capillary blood flow is developed which is coupled with a scalar transport model, to characterise the behaviour of both blood-pool and freely-diffusive contrast agents characterised by their ability to diffuse through the capillary wall into the extra-cellular space. A parameter space study is performed on the nondimensionalised equations using a 2D model for both healthy and diseased myocardium, examining the sensitivity of system behaviour to Peclet number, Damköhler number (Da), diffusivity ratio and fluid porosity. Assuming a linear MR signal response model, sample concentration time series data are calculated, and the sensitivity of clinically-relevant properties of these signals to the model parameters is quantified. Both upslope and peak values display significant non-monotonic behaviour with regard to the Damköhler number, with these properties showing a high degree of sensitivity in the parameter range relevant to contrast agents currently in use. However, the results suggest that signal upslope is the more robust and discerning metric for perfusion quantification, in particular for correlating with perfusion defect size. Finally, the results were examined in the context of nonlinear signal response, flow quantification via Fermi deconvolution and perfusion reserve index, which demonstrated that there is no single best set of contrast agent parameters, instead the contrast agents should be tailored to the specific imaging protocol and post-processing method to be used.

A.N. Cookson; J. Lee; C. Michler; R. Chabiniok; E. Hyde; D. Nordsletten; N.P. Smith

2014-01-01T23:59:59.000Z

396

L3 Milestone Use Computational Model to Design and Optimize Welding Conditions to Suppress Helium  

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

L3 Milestone L3 Milestone Use Computational Model to Design and Optimize Welding Conditions to Suppress Helium Cracking during Welding June 2012 Wei Zhang and Zhili Feng, ORNL Eric Willis, EPRI Background and Objectives Today, welding is widely used for repair, maintenance and upgrade of nuclear reactor components. As a critical technology to extend the service life of nuclear power plants beyond 60 years, weld technology must be further developed to meet new challenges associated with the aging of the plants, such as control and mitigation of the detrimental effects of weld residual stresses and repair of highly irradiated materials. To meet this goal, fundamental understanding of the "welding" effect is necessary for development of new and improved welding technologies.

397

Computer simulations of the restricted primitive model at very low temperature and density  

E-Print Network (OSTI)

The problem of successfully simulating ionic fluids at low temperature and low density states is well known in the simulation literature: using conventional methods, the system is not able to equilibrate rapidly due to the presence of strongly associated cation-anion pairs. In this manuscript we present a numerical method for speeding up computer simulations of the restricted primitive model (RPM) at low temperatures (around the critical temperature) and at very low densities (down to $10^{-10}\\sigma^{-3}$, where $\\sigma$ is the ion diameter). Experimentally, this regime corresponds to typical concentrations of electrolytes in nonaqueous solvents. As far as we are aware, this is the first time that the RPM has been equilibrated at such extremely low concentrations. More generally, this method could be used to equilibrate other systems that form aggregates at low concentrations.

Chantal Valeriani; Philip J. Camp; Jos W. Zwanikken; René van Roij; Marjolein Dijkstra

2009-09-30T23:59:59.000Z

398

Coupling Multi-Component Models with MPH on Distributed MemoryComputer Architectures  

SciTech Connect

A growing trend in developing large and complex applications on today's Teraflop scale computers is to integrate stand-alone and/or semi-independent program components into a comprehensive simulation package. One example is the Community Climate System Model which consists of atmosphere, ocean, land-surface and sea-ice components. Each component is semi-independent and has been developed at a different institution. We study how this multi-component, multi-executable application can run effectively on distributed memory architectures. For the first time, we clearly identify five effective execution modes and develop the MPH library to support application development utilizing these modes. MPH performs component-name registration, resource allocation and initial component handshaking in a flexible way.

He, Yun; Ding, Chris

2005-03-24T23:59:59.000Z

399

Extraction of actinides by multi-dentate diamides and their evaluation with computational molecular modeling  

SciTech Connect

Multi-dentate diamides have been synthesized and examined for actinide (An) extractions. Bi- and tridentate extractants are the focus in this work. The extraction of actinides was performed from 0.1-6 M HNO{sub 3} to organic solvents. It was obvious that N,N,N',N'-tetra-alkyl-diglycolamide (DGA) derivatives, 2,2'-(methylimino)bis(N,N-dioctyl-acetamide) (MIDOA), and N,N'-dimethyl-N,N'-dioctyl-2-(3-oxa-pentadecane)-malonamide (DMDOOPDMA) have relatively high D values (D(Pu) > 70). The following notable results using DGA extractants were obtained: (1) DGAs with short alkyl chains give higher D values than those with long alkyl chain, (2) DGAs with long alkyl chain have high solubility in n-dodecane. Computational molecular modeling was also used to elucidate the effects of structural and electronic properties of the reagents on their different extractabilities. (authors)

Sasaki, Y.; Kitatsuji, Y.; Hirata, M.; Kimura, T. [Japan Atomic Energy Agency, Tokai-mura, Ibaraki 319-1195 (Japan); Yoshizuka, K. [The University of Kitakyushu, Wakamatsu, Kitakyushu, Fukuoka 808-0135 (Japan)

2008-07-01T23:59:59.000Z

400

DualTrust: A Distributed Trust Model for Swarm-Based Autonomic Computing Systems  

SciTech Connect

For autonomic computing systems that utilize mobile agents and ant colony algorithms for their sensor layer, trust management is important for the acceptance of the mobile agent sensors and to protect the system from malicious behavior by insiders and entities that have penetrated network defenses. This paper examines the trust relationships, evidence, and decisions in a representative system and finds that by monitoring the trustworthiness of the autonomic managers rather than the swarming sensors, the trust management problem becomes much more scalable and still serves to protect the swarm. We then propose the DualTrust conceptual trust model. By addressing the autonomic manager’s bi-directional primary relationships in the ACS architecture, DualTrust is able to monitor the trustworthiness of the autonomic managers, protect the sensor swarm in a scalable manner, and provide global trust awareness for the orchestrating autonomic manager.

Maiden, Wendy M.; Dionysiou, Ioanna; Frincke, Deborah A.; Fink, Glenn A.; Bakken, David E.

2011-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "including computer modeling" 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

Including Tunneling in Non-Born–Oppenheimer Simulations  

Science Journals Connector (OSTI)

Including Tunneling in Non-Born–Oppenheimer Simulations ... We note that tunneling may be included in the modeling of electronically nonadiabatic processes by other methods as well, for example, quantal wave packet methods where the wave packet is not restricted to follow a classical trajectory,(18) path integral dynamics,(19-21) and the initial value representation,(22) but these methods will require more development of efficient computational strategies for their practical application to complex systems, whereas the method proposed here has a cost comparable to non-Born–Oppenheimer (NBO) trajectory calculations that do not include tunneling. ... We also ran Born–Oppenheimer trajectories with the same total energy on the adiabatic ground state for comparison. ...

Jingjing Zheng; Rubén Meana-Pañeda; Donald G. Truhlar

2014-05-15T23:59:59.000Z

402

Computational Nanophotonics: modeling optical interactions and transport in tailored nanosystem architectures  

SciTech Connect

This report describes research by George Schatz and Mark Ratner that was done over the period 10/03-5/09 at Northwestern University. This research project was part of a larger research project with the same title led by Stephen Gray at Argonne. A significant amount of our work involved collaborations with Gray, and there were many joint publications as summarized later. In addition, a lot of this work involved collaborations with experimental groups at Northwestern, Argonne, and elsewhere. The research was primarily concerned with developing theory and computational methods that can be used to describe the interaction of light with noble metal nanoparticles (especially silver) that are capable of plasmon excitation. Classical electrodynamics provides a powerful approach for performing these studies, so much of this research project involved the development of methods for solving Maxwell’s equations, including both linear and nonlinear effects, and examining a wide range of nanostructures, including particles, particle arrays, metal films, films with holes, and combinations of metal nanostructures with polymers and other dielectrics. In addition, our work broke new ground in the development of quantum mechanical methods to describe plasmonic effects based on the use of time dependent density functional theory, and we developed new theory concerned with the coupling of plasmons to electrical transport in molecular wire structures. Applications of our technology were aimed at the development of plasmonic devices as components of optoelectronic circuits, plasmons for spectroscopy applications, and plasmons for energy-related applications.

Schatz, George; Ratner, Mark

2014-02-27T23:59:59.000Z

403

Computational and experimental investigation of scour past laboratory models of stream restoration rock structures  

Science Journals Connector (OSTI)

Local scour of the streambed around three models of stream restoration rock structures, including a rock vane, a cross vane, and a J-hook vane, is investigated via laboratory experiments and numerical simulations. In the experimental study, a physical model of each rock structure is constructed via an assembly of rocks and installed in a straight mobile sand bed flume. Continuous bed topography measurements provide insight into the time evolution of the scour patterns downstream of the structures and yield comprehensive data sets for validating the numerical simulations in terms of scour patterns, maximum scour depths, and bar migration dynamics. The numerical simulations are carried out using the coupled, hydro-morphodynamic Curvilinear Immersed Boundary (CURVIB) method of Khosronejad et al. (2011) [17]. The mobile channel bed and the individual rocks comprising a stream restoration structure are discretized with an unstructured triangular mesh and treated as sharp-interface immersed boundaries embedded in the background curvilinear mesh used to discretize the flow domain. For each case, simulations are carried out solving both the unsteady Reynolds-averaged Navier–Stokes (URANS) equations closed with the k–? model and filtered Large-Eddy Simulation (LES) equations closed with the dynamic Smagorinski subgrid scale model. Both the URANS and LES models yield flow and scour patterns in reasonable agreement with the measurements with the LES results being consistently in better overall agreement with the measurements. To our knowledge, the present study is the first attempt to simulate local scour patterns around realistic model of stream restoration rock structures by taking into account and directly modeling their arbitrarily complex geometrical features.

Ali Khosronejad; Craig Hill; Seokkoo Kang; Fotis Sotiropoulos

2013-01-01T23:59:59.000Z

404

Application of computer modeling techniques to the kinetics of the reaction of carbon with oxygen  

SciTech Connect

Computer modeling techniques are applied to the kinetics of the reaction of carbon with oxygen. The rates of disappearance of oxygen, of formation of CO, CO/sub 2/ and the surface complex, measured over the temperature range 748-1173 K and the pressure range 0.5-400 Pa may be described by a mechanism involving adsorption of oxygen, formation of the strongly-bound complex, desorption of the complex and reaction of the complex with a gas-phase molecule of oxygen. The latter is shown to be an important source of CO/sub 2/ at low temperatures and higher pressures of oxygen. An important feature of the mechanism is the existence of at least two distinct types of active sites for the binding of the complex on the carbon surface, each with a characteristic reactivity. Most of the results on which the model is based were obtained using thin films of pyrolytic carbon, but some results from the oxidation of graphon are also consistent with the mechanism.

Ahmed, S.; Back, M.H.; Roscoe, J.M.

1989-01-01T23:59:59.000Z

405

Computational Model of the Mark-IV Electrorefiner: Two-Dimensional Potential and Current Distributions  

SciTech Connect

A computational model of the Mark-IV electrorefiner is currently being developed as a joint project between Idaho National Laboratory, Korea Atomic Energy Research Institute, Seoul National University, and the University of Idaho. As part of this model, the two-dimensional potential and current distributions within the molten salt electrolyte are calculated for U3+ , Zr4+ , and Pu3+ along with the total distributions, using the partial differential equation solver of the commercial Matlab software. The electrical conductivity of the electrolyte solution is shown to depend primarily on the composition of the electrolyte and to average 205 mho/m with a standard deviation of 2.5 × 10-5% throughout the electrorefining process. These distributions show that the highest potential gradients (thus, the highest current) exist directly between the two anodes and cathode. The total, uranium, and plutonium potential gradients are shown to increase throughout the process, with a slight decrease in that of zirconium. The distributions also show small potential gradients and very little current flow in the region far from the operating electrodes.

Supathorn Phongikaroon; Steven Herrmann; Michael F. Simpson

2011-02-01T23:59:59.000Z

406

Computational fluid dynamics modelling and experimental study on a single silica gel type B  

Science Journals Connector (OSTI)

The application of computational fluid dynamics (CFDs) in the area of porous media and adsorption cooling system is becoming more practical due to the significant improvement in computer power. The results from previous studies have shown that CFD can ...

John White

2012-01-01T23:59:59.000Z

407

Modeling and Simulation Environment for Photonic Interconnection Networks in High Performance Computing  

E-Print Network (OSTI)

at the scale of high performance computer clusters and warehouse scale data centers, system level simulations and results for rack scale photonic interconnection networks for high performance computing. Keywords: optical to the newsworthy power consumption [3], latency [4] and bandwidth challenges [5] of high performance computing (HPC

Bergman, Keren

408

Computational Nanophotonics: Model Optical Interactions and Transport in Tailored Nanosystem Architectures  

SciTech Connect

The program is directed toward development of new computational approaches to photoprocesses in nanostructures whose geometry and composition are tailored to obtain desirable optical responses. The emphasis of this specific program is on the development of computational methods and prediction and computational theory of new phenomena of optical energy transfer and transformation on the extreme nanoscale (down to a few nanometers).

Stockman, Mark [Georgia State University Research Foundation] [Georgia State University Research Foundation; Gray, Steven [Argon National Laboratory] [Argon National Laboratory

2014-02-21T23:59:59.000Z

409

Automated Office Systems Support (AOSS) Quality Assurance Model...  

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

assurance model, including checklists, for activity relative to network and desktop computer support. Automated Office Systems Support (AOSS) Quality Assurance Model More...

410

Computer simulation models relevant to ground water contamination from EOR or other fluids - state-of-the-art  

SciTech Connect

Ground water contamination is a serious national problem. The use of computers to simulate the behavior of fluids in the subsurface has proliferated extensively over the last decade. Numerical models are being used to solve water supply problems, various kinds of enertgy production problems, and ground water contamination problems. Modeling techniques have progressed to the point that their accuracy is only limited by the modeller's ability to describe the reservoir in question and the heterogeneities therein. Pursuant to the Task and Milestone Update of Project BE3A, this report summarizes the state of the art of computer simulation models relevant to contamination of ground water by enhanced oil recovery (EOR) chemicals and/or waste fluids. 150 refs., 6 tabs.

Kayser, M.B.; Collins, A.G.

1986-03-01T23:59:59.000Z

411

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

412

Mathematics and Computers in Simulation 65 (2004) 557577 Parallel runs of a large air pollution model on a  

E-Print Network (OSTI)

-three decades. The need to establish reliable control strategies for the air pollution levels will become evenMathematics and Computers in Simulation 65 (2004) 557­577 Parallel runs of a large air pollution 20 January 2004; accepted 21 January 2004 Abstract Large-scale air pollution models can successfully

413

Fundamental properties of solar-like oscillating stars from frequencies of minimum – I. Model computations for solar composition  

Science Journals Connector (OSTI)

......Model computations for solar composition M. Yz...defining characteristic of solar-like oscillations. The space projects Kepler and CoRoT give...mass and radius of a solar-like oscillating...transformation between the energy transportation mechanisms......

M. Y?ld?z; Z. Çelik Orhan; Ç. Aksoy; S. Ok

2014-01-01T23:59:59.000Z

414

Computational Modeling of Human Head Under Blast Shailesh Ganpule, Dr. Linxia Gu, Dr. Guoxin Cao, Dr.Namas Chandra  

E-Print Network (OSTI)

Computational Modeling of Human Head Under Blast Loading Shailesh Ganpule, Dr. Linxia Gu, Dr;Presentation Objective: To understand role of helmet in blast induced Traumatic Brain Injury (TBI: To understand underlying mechanisms of blast induced Traumatic Brain Injury (TBI) and develop mitigation

Farritor, Shane

415

In "Handbook of Mathematical Models in Computer Vision", Springer, 2006 p.1 Graph Cuts in Vision and Graphics  

E-Print Network (OSTI)

In "Handbook of Mathematical Models in Computer Vision", Springer, 2006 p.1 Graph Cuts in Vision, shortest paths [6, 22]), Markov ran- dom fields, statistical physics, simulated annealing and other. This chap- ter does not provide any new research results, however, some applications are presented from

Boykov, Yuri

416

ICSE Workshop on Green and Sustainable Software Engineering, Zurich, Switzerland, 3rd June 2012 An Energy Consumption Model and Analysis Tool for Cloud Computing  

E-Print Network (OSTI)

system-level optimisation. Keywords-green computing; Cloud computing; energy consumption; performanceIn 1st ICSE Workshop on Green and Sustainable Software Engineering, Zurich, Switzerland, 3rd June 2012 An Energy Consumption Model and Analysis Tool for Cloud Computing Environments FeiFei Chen, Jean

Schneider, Jean-Guy

417

Theory and computational modeling: Medium reorganization and donor/acceptor coupling in electron transfer processes  

SciTech Connect

The continuing goal is to convert the rapidly accumulating mechanistic information about electron transfer (et) kinetics (often representable in terms of simple rate constants) into precise tools for fine-tuned control of the kinetics and for design of molecular-based systems which meet specified et characteristics. The present treatment will be limited to the kinetic framework defined by the assumption of transition state theory (TST). The primary objective of this paper is to report recent advances in the theoretical formulation, calculation, and analysis of energetics and electronic coupling pertinent to et in complex molecular aggregates. The control of et kinetics (i.e., enhancing desired processes, while inhibiting others) involves, of course, both system energetics (especially reorganization energies (E{sub r}) and free energy changes ({Delta}G{sup 0})) and electronic coupling of local D and A sites, which for thermal processes is most directly relevant only after the system has reached the appropriate point (or region) along the reaction coordinate (i.e., the transition state). The authors first discuss TST rate constant models, emphasizing genetic features, but also noting some special features arising when metal electrodes are involved. They then turn to a consideration of detailed aspects of medium reorganization and donor/acceptor coupling. With these theoretical tools in hand, they examine the results of recent applications to complex molecular systems using the techniques of computational quantum chemistry and electrostatics, together with detailed analysis of the numerical results and comparison with recent electrochemical kinetic data.

Newton, M.D.; Feldberg, S.W.; Smalley, J.F.

1998-03-01T23:59:59.000Z

418

Development of a Computational Fluid Dynamics Model for Combustion of Fast Pyrolysis Liquid (Bio-oil).  

E-Print Network (OSTI)

??A study was carried out into the computational fluid dynamic simulation of bio-oil combustion. Measurements were taken in an empirical burner to obtain information regarding… (more)

McGrath, Arran Thomas

2011-01-01T23:59:59.000Z

419

Tideflow| A dataflow-inspired execution model for high performance computing programs.  

E-Print Network (OSTI)

?? Traditional programming, execution and optimization techniques have been shown to be inadequate to exploit the features of computer processors with many cores. In particular,… (more)

Orozco, Daniel A.

2012-01-01T23:59:59.000Z

420

Meals included in Conference Registrations  

E-Print Network (OSTI)

Meals included in Conference Registrations Meals included as part of the cost of a conference the most reasonable rates are obtained. Deluxe hotels and motels should be avoided. GSA rates have been for Georgia high cost areas. 75% of these amounts would be $21 for non- high cost areas and $27 for high cost

Arnold, Jonathan

Note: This page contains sample records for the topic "including computer modeling" 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

Some aspects of the computer simulation of conduction heat transfer and phase change processes  

SciTech Connect

Various aspects of phase change processes in materials are discussd including computer modeling, validation of results and sensitivity. In addition, the possible incorporation of cognitive activities in computational heat transfer is examined.

Solomon, A. D.

1982-04-01T23:59:59.000Z

422

Moving Volunteer Computing towards Knowledge-Constructed, Dynamically-Adaptive Modeling and Scheduling  

E-Print Network (OSTI)

projects like Folding@home are moving towards the use of a broader range of architectures and comput- ers new research directions. For example, mature projects like Folding@home are moving towards the use of a broader range of architectures and computers. Folding@home re- cently announced a BOINC client that runs

Taufer, Michela

423

Coupling Multi-Component Models with MPH on Distributed Memory Computer Architectures  

E-Print Network (OSTI)

Among these, NASA’s Earth System Models Framework (ESMF) [to facilitate coupling earth system model components and to

He, Yun; Ding, Chris

2005-01-01T23:59:59.000Z

424

Final Report, Center for Programming Models for Scalable Parallel Computing: Co-Array Fortran, Grant Number DE-FC02-01ER25505  

SciTech Connect

The major accomplishment of this project is the production of CafLib, an 'object-oriented' parallel numerical library written in Co-Array Fortran. CafLib contains distributed objects such as block vectors and block matrices along with procedures, attached to each object, that perform basic linear algebra operations such as matrix multiplication, matrix transpose and LU decomposition. It also contains constructors and destructors for each object that hide the details of data decomposition from the programmer, and it contains collective operations that allow the programmer to calculate global reductions, such as global sums, global minima and global maxima, as well as vector and matrix norms of several kinds. CafLib is designed to be extensible in such a way that programmers can define distributed grid and field objects, based on vector and matrix objects from the library, for finite difference algorithms to solve partial differential equations. A very important extra benefit that resulted from the project is the inclusion of the co-array programming model in the next Fortran standard called Fortran 2008. It is the first parallel programming model ever included as a standard part of the language. Co-arrays will be a supported feature in all Fortran compilers, and the portability provided by standardization will encourage a large number of programmers to adopt it for new parallel application development. The combination of object-oriented programming in Fortran 2003 with co-arrays in Fortran 2008 provides a very powerful programming model for high-performance scientific computing. Additional benefits from the project, beyond the original goal, include a programto provide access to the co-array model through access to the Cray compiler as a resource for teaching and research. Several academics, for the first time, included the co-array model as a topic in their courses on parallel computing. A separate collaborative project with LANL and PNNL showed how to extend the co-array model to other languages in a small experimental version of Co-array Python. Another collaborative project defined a Fortran 95 interface to ARMCI to encourage Fortran programmers to use the one-sided communication model in anticipation of their conversion to the co-array model later. A collaborative project with the Earth Sciences community at NASA Goddard and GFDL experimented with the co-array model within computational kernels related to their climate models, first using CafLib and then extending the co-array model to use design patterns. Future work will build on the design-pattern idea with a redesign of CafLib as a true object-oriented library using Fortran 2003 and as a parallel numerical library using Fortran 2008.

Robert W. Numrich

2008-04-22T23:59:59.000Z

425

Toward an Optimal Position for IVC Filters: Computational Modeling of the Impact of Renal Vein Inflow  

SciTech Connect

The purpose of this report is to evaluate the hemodynamic effects of renal vein inflow and filter position on unoccluded and partially occluded IVC filters using three-dimensional computational fluid dynamics. Three-dimensional models of the TrapEase and Gunther Celect IVC filters, spherical thrombi, and an IVC with renal veins were constructed. Hemodynamics of steady-state flow was examined for unoccluded and partially occluded TrapEase and Gunther Celect IVC filters in varying proximity to the renal veins. Flow past the unoccluded filters demonstrated minimal disruption. Natural regions of stagnant/recirculating flow in the IVC are observed superior to the bilateral renal vein inflows, and high flow velocities and elevated shear stresses are observed in the vicinity of renal inflow. Spherical thrombi induce stagnant and/or recirculating flow downstream of the thrombus. Placement of the TrapEase filter in the suprarenal vein position resulted in a large area of low shear stress/stagnant flow within the filter just downstream of thrombus trapped in the upstream trapping position. Filter position with respect to renal vein inflow influences the hemodynamics of filter trapping. Placement of the TrapEase filter in a suprarenal location may be thrombogenic with redundant areas of stagnant/recirculating flow and low shear stress along the caval wall due to the upstream trapping position and the naturally occurring region of stagnant flow from the renal veins. Infrarenal vein placement of IVC filters in a near juxtarenal position with the downstream cone near the renal vein inflow likely confers increased levels of mechanical lysis of trapped thrombi due to increased shear stress from renal vein inflow.

Wang, S L; Singer, M A

2009-07-13T23:59:59.000Z

426

An Evolutionary Algorithm Based Performance Analysis of Multiprocessor Computers through Energy and Schedule Length Model  

Science Journals Connector (OSTI)

Multiprocessors have emerged as a powerful computing means for running real-time applications, especially where a uniprocessor system would not be sufficient enough to execute all the tasks. The high performan...

Paulraj Ranjith kumar; Sankaran Palani

2011-01-01T23:59:59.000Z

427

Security Driven Scheduling Model for Computational Grid Using NSGA-II  

Science Journals Connector (OSTI)

Number of software applications demands various levels of security at the time of scheduling in Computational Grid. Grid may offer these securities but may result in the performance degradation due to overhead in...

Rekha Kashyap; Deo Prakash Vidyarthi

2013-12-01T23:59:59.000Z

428

Parallel Computational Modelling of Inelastic Neutron Scattering in Multi-node and Multi-core Architectures   

E-Print Network (OSTI)

This paper examines the initial parallel implementation of SCATTER, a computationally intensive inelastic neutron scattering routine with polycrystalline averaging capability, for the General Utility Lattice Program (GULP). Of particular importance...

Garba, M.T.; Gonzales-Velez, H.; Roach, D.L.

2010-11-26T23:59:59.000Z

429

Computational performance of ultra-high-resolution capability in the Community Earth System Model  

Science Journals Connector (OSTI)

With the fourth release of the Community Climate System Model, the ability to perform ultra-high-resolution climate simulations is now possible, enabling eddy-resolving ocean and sea-ice models to be coupled to a finite-volume atmosphere model for a ... Keywords: Earth system modeling, Performance engineering, application optimization, climate modeling, high-resolution

John M. Dennis; Mariana Vertenstein; Patrick H. Worley; Arthur A. Mirin; Anthony P. Craig; Robert Jacob; Sheri Mickelson

2012-02-01T23:59:59.000Z

430

Computer aided surface representation  

SciTech Connect

The aims of this research are the creation of new surface forms and the determination of geometric and physical properties of surfaces. The full sweep from constructive mathematics through the implementation of algorithms and the interactive computer graphics display of surfaces is utilized. Both three-dimensional and multi- dimensional surfaces are considered. Particular emphasis is given to the scientific computing solution of Department of Energy problems. The methods that we have developed and that we are proposing to develop allow applications such as: Producing smooth contour maps from measured data, such as weather maps. Modeling the heat distribution inside a furnace from sample measurements. Terrain modeling based on satellite pictures. The investigation of new surface forms includes the topics of triangular interpolants, multivariate interpolation, surfaces defined on surfaces and monotone and/or convex surfaces. The geometric and physical properties considered include contours, the intersection of surfaces, curvatures as a interrogation tool, and numerical integration.

Barnhill, R E

1987-11-01T23:59:59.000Z

431

Yao, Y.Y., Decision-theoretic Rough Set Models (DTRSM) Computer Science (Ji Suan Ji Ke Xue), Vol. 35, No. 8A, pp. 7-8, 2008.  

E-Print Network (OSTI)

Yao, Y.Y., Decision-theoretic Rough Set Models (DTRSM) Computer Science (Ji Suan Ji Ke Xue), Vol. 35, No. 8A, pp. 7-8, 2008. Decision-Theoretic Rough Set Models (DTRSM) Yiyu (Y.Y.) Yao Department://www.cs.uregina.ca/~yyao The standard rough sets model is a qualitative model that defines three regions for approximating a subset

Yao, Yiyu

432

Computational modeling of the brain limbic system and its application in control engineering  

E-Print Network (OSTI)

of this thesis, Chapter IV, shows the utilization of the Brain Emotional Learning (BEL) model in different applications of control and signal fusion systems. The main effort is focused on applying the model to control systems where the model acts...

Shahmirzadi, Danial

2005-11-01T23:59:59.000Z

433

Sponsorship includes: Agriculture in the  

E-Print Network (OSTI)

Sponsorship includes: · Agriculture in the Classroom · Douglas County Farm Bureau · Gifford Farm · University of Nebraska Agricultural Research and Development Center · University of Nebraska- Lincoln Awareness Coalition is to help youth, primarily from urban communities, become aware of agriculture

Nebraska-Lincoln, University of

434

Exploiting Virtualization and Cloud Computing in ATLAS  

E-Print Network (OSTI)

The ATLAS Computing Model was designed around the concept of grid computing; since the start of data-taking, this model has proven very successful in the federated operation of more than one hundred Worldwide LHC Computing Grid (WLCG) sites for offline data distribution, storage, processing and analysis. However, new paradigms in computing, namely virtualization and cloud computing, present improved strategies for managing and provisioning IT resources that could allow ATLAS to more flexibly adapt and scale its storage and processing workloads on varied underlying resources. In particular, ATLAS is developing a "grid-of-clouds" infrastructure in order to utilize WLCG sites that make resources available via a cloud API. This work will present the current status of the Virtualization and Cloud Computing R&D project in ATLAS Distributed Computing. First, strategies for deploying PanDA queues on cloud sites will be discussed, including the introduction of a "cloud factory" for managing cloud VM instances. Nex...

Barreiro Megino, FH; The ATLAS collaboration; De, K; Gable, I; Hendrix, V; Panitkin, S; Paterson, M; De Silva, A; van der Ster, D; Taylor, R; Vitillo, RA; Walker, R

2012-01-01T23:59:59.000Z

435

A Molecular Modeling Toolkit with Applications to Efficient Free Energy Computation.  

E-Print Network (OSTI)

??In this thesis we develop a molecular modeling toolkit that models the conformation space of proteins and allows easy prototyping of algorithms on the conformation… (more)

Tezcan, Hasan Gokhan

2010-01-01T23:59:59.000Z

436

NREL Computer Models Integrate Wind Turbines with Floating Platforms (Fact Sheet), The Spectrum of Clean Energy Innovation, NREL (National Renewable Energy Laboratory)  

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

Computer Models Computer Models Integrate Wind Turbines with Floating Platforms Far off the shores of energy-hungry coastal cities, powerful winds blow over the open ocean, where the water is too deep for today's seabed-mounted offshore wind turbines. For the United States to tap into these vast offshore wind energy resources, wind turbines must be mounted on floating platforms to be cost effective. Researchers at the National Renewable Energy Laboratory (NREL) are supporting that development with computer models that allow detailed analyses of such floating wind turbines. Coupling wind turbines and floating platforms requires complex computer models. Land- based wind turbines are designed and analyzed using simulation tools, called computer-aided engineering (CAE) design tools, that are capable of predicting a design's dynamic response to

437

Development and Validation of the 3-D Computational Fluid Dynamics Model for CANDU-6 Moderator Temperature Predictions  

SciTech Connect

A computational fluid dynamics (CFD) model for predicting the moderator circulation inside the Canada deuterium uranium (CANDU) reactor vessel has been developed to estimate the local subcooling of the moderator in the vicinity of the Calandria tubes. The buoyancy effect induced by internal heating is accounted for by Boussinesq approximation. The standard k-[curly epsilon] turbulence model associated with logarithmic wall treatment is applied to predict the turbulent jet flows from the inlet nozzles. The matrix of the Calandria tubes in the core region is simplified to porous media, in which anisotropic hydraulic impedance is modeled using an empirical correlation of the frictional pressure loss. The governing equations are solved by CFX-4.4, a commercial CFD code developed by AEA Technology. The CFD model has been successfully verified and validated against experimental data obtained at Stern Laboratories Inc. in Hamilton, Ontario, Canada.

Yoon, Churl; Rhee, Bo Wook; Min, Byung-Joo [Korea Atomic Energy Research Institute (Korea, Republic of)

2004-12-15T23:59:59.000Z

438

An efficient parallel-computing method for modeling nonisothermal multiphase flow and multicomponent transport in porous  

E-Print Network (OSTI)

numerical model simulating flow of moisture in the unsaturated zone of Yucca Mountain, Nevada; the second

Elmroth, Erik

439

Computational Model of Forward and Opposed Smoldering Combustion with Improved Chemical Kinetics (PhD. Thesis)  

E-Print Network (OSTI)

for modeling urethane foam insulation performance, Journalinsulation, upholstery, shock absorbing, and soundproofing. PU foam

Rein, Guillermo

2005-01-01T23:59:59.000Z

440

User manual for AQUASTOR: a computer model for cost analysis of aquifer thermal energy storage coupled with district heating or cooling systems. Volume I. Main text  

SciTech Connect

A computer model called AQUASTOR was developed for calculating the cost of district heating (cooling) using thermal energy supplied by an aquifer thermal energy storage (ATES) system. The AQUASTOR model can simulate ATES district heating systems using stored hot water or ATES district cooling systems using stored chilled water. AQUASTOR simulates the complete ATES district heating (cooling) system, which consists of two principal parts: the ATES supply system and the district heating (cooling) distribution system. The supply system submodel calculates the life-cycle cost of thermal energy supplied to the distribution system by simulating the technical design and cash flows for the exploration, development, and operation of the ATES supply system. The distribution system submodel calculates the life-cycle cost of heat (chill) delivered by the distribution system to the end-users by simulating the technical design and cash flows for the construction and operation of the distribution system. The model combines the technical characteristics of the supply system and the technical characteristics of the distribution system with financial and tax conditions for the entities operating the two systems into one techno-economic model. This provides the flexibility to individually or collectively evaluate the impact of different economic and technical parameters, assumptions, and uncertainties on the cost of providing district heating (cooling) with an ATES system. This volume contains the main text, including introduction, program description, input data instruction, a description of the output, and Appendix H, which contains the indices for supply input parameters, distribution input parameters, and AQUASTOR subroutines.

Huber, H.D.; Brown, D.R.; Reilly, R.W.

1982-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "including computer modeling" 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

Proceedings of the The IEEE Computer Society's 12th Annual International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunications Systems (MASCOTS'04)  

E-Print Network (OSTI)

, Analysis, and Simulation of Computer and Telecommunications Systems (MASCOTS'04) 1526-7539/04 $20.00 © 2004, Analysis, and Simulation of Computer and Telecommunications Systems (MASCOTS'04) 1526-7539/04 $20.00 © 2004, Analysis, and Simulation of Computer and Telecommunications Systems (MASCOTS'04) 1526-7539/04 $20.00 © 2004

Menascé, Daniel A.

442

Duality and Recycling Computing in Quantum Computers  

E-Print Network (OSTI)

Quantum computer possesses quantum parallelism and offers great computing power over classical computer \\cite{er1,er2}. As is well-know, a moving quantum object passing through a double-slit exhibits particle wave duality. A quantum computer is static and lacks this duality property. The recently proposed duality computer has exploited this particle wave duality property, and it may offer additional computing power \\cite{r1}. Simply put it, a duality computer is a moving quantum computer passing through a double-slit. A duality computer offers the capability to perform separate operations on the sub-waves coming out of the different slits, in the so-called duality parallelism. Here we show that an $n$-dubit duality computer can be modeled by an $(n+1)$-qubit quantum computer. In a duality mode, computing operations are not necessarily unitary. A $n$-qubit quantum computer can be used as an $n$-bit reversible classical computer and is energy efficient. Our result further enables a $(n+1)$-qubit quantum computer to run classical algorithms in a $O(2^n)$-bit classical computer. The duality mode provides a natural link between classical computing and quantum computing. Here we also propose a recycling computing mode in which a quantum computer will continue to compute until the result is obtained. These two modes provide new tool for algorithm design. A search algorithm for the unsorted database search problem is designed.

Gui Lu Long; Yang Liu

2007-08-15T23:59:59.000Z

443

Computer hardware fault administration  

DOE Patents (OSTI)

Computer hardware fault administration carried out in a parallel computer, where the parallel computer includes a plurality of compute nodes. The compute nodes are coupled for data communications by at least two independent data communications networks, where each data communications network includes data communications links connected to the compute nodes. Typical embodiments carry out hardware fault administration by identifying a location of a defective link in the first data communications network of the parallel computer and routing communications data around the defective link through the second data communications network of the parallel computer.

Archer, Charles J. (Rochester, MN); Megerian, Mark G. (Rochester, MN); Ratterman, Joseph D. (Rochester, MN); Smith, Brian E. (Rochester, MN)

2010-09-14T23:59:59.000Z

444

Computational methods for constructing protein structure models from 3D electron microscopy maps  

E-Print Network (OSTI)

into a low-res- olution EM map. A list of available computational tools is also provided. Ã? 2013 Elsevier Inc, Purdue University, West Lafayette, IN 47907, USA b Department of Biological Sciences, College of Science, Purdue University, West Lafayette, IN 47907, USA c Markey Center for Structural Biology, College

Kihara, Daisuke

445

Quantum computation in brain microtubules? The Penrose–Hameroff ‘Orch OR‘ model of consciousness  

Science Journals Connector (OSTI)

...measurable by near-future advances in brain imaging...isolated, unperturbed quantum system self-collapses...Raimond, J.-M. 1996 Quantum computing: dream or...1994 Role of MAPs and motors in the bundling and shimmering...Yasue, K. 1995 Quantum brain dynamics: an introduction...

1998-01-01T23:59:59.000Z

446

Synergy of cell–cell repulsion and vacuolation in a computational model of lumen formation  

Science Journals Connector (OSTI)

...vesicles and associated motor proteins with a randomly...cell adhesion at the future luminal and basolateral...3] showed that red quantum dots in lumens, formed...intravascularly injected red quantum dots are serially transferred...2013 Predicting the future: towards symbiotic computational...

2014-01-01T23:59:59.000Z

447

Under consideration for publication in Formal Aspects of Computing An Abstract Model of Service  

E-Print Network (OSTI)

of the languages in which services are programmed. The Open Service Oriented Architecture collaboration (www which are at the heart of building applications using a service-oriented architecture" [OSO05]. However; Service binding, discovery, ranking; Service level agreement; Service-oriented computing 1. Introduction

Sheldon, Nathan D.

448

Math 50, Section 02 Tufts University Modeling and Computing Department of Mathematics Fall 2011  

E-Print Network (OSTI)

Course Website: http://neumann.math.tufts.edu/scott/math50. Recommended Materials: Matlab & Simulink to do these in Matlab. All Tufts students have access to Matlab in the ITS Computing Center at Eaton assignments, two midterm projects, and a final project. Your final percentage grade in the course

MacLachlan, Scott

449

Physically-based modeling, simulation and rendering of fire for computer animation  

Science Journals Connector (OSTI)

We give an up-to-date survey on techniques and methods for fire simulation in computer graphics. Physically-based method prevails over traditional non-physical methods for realistic visual effect. In this paper, we explore visual simulation of fire-related ... Keywords: Blackbody radiation, Chemical reaction, Fire, Navier---Stokes equations, Physically-based simulation, Visual adaption

Zhanpeng Huang, Guanghong Gong, Liang Han

2014-08-01T23:59:59.000Z

450

Computer resources Computer resources  

E-Print Network (OSTI)

Computer resources 1 Computer resources available to the LEAD group Cédric David 30 September 2009 #12;Ouline · UT computer resources and services · JSG computer resources and services · LEAD computers· LEAD computers 2 #12;UT Austin services UT EID and Password 3 https://utdirect.utexas.edu #12;UT Austin

Yang, Zong-Liang

451

Liquefied Natural Gas (LNG) Vapor Dispersion Modeling with Computational Fluid Dynamics Codes  

E-Print Network (OSTI)

Federal regulation 49 CFR 193 and standard NFPA 59A require the use of validated consequence models to determine the vapor cloud dispersion exclusion zones for accidental liquefied natural gas (LNG) releases. For modeling purposes, the physical...

Qi, Ruifeng

2012-10-19T23:59:59.000Z

452

Computational Science Technical Note CSTN-038 Tuning Growth Stability in an Animat Agent Model  

E-Print Network (OSTI)

models [15] provide a powerful vehicle for study- ing these phenomena. We have developed a simula- tion in real ecological populations and which can be modelled using partial differential field equations (PDE

Hawick, Ken

453

Modeling and computer simulation of the identification problem related to the sludge concentration in a settler  

Science Journals Connector (OSTI)

The mathematical model of sludge particles settling in the water treatment plant (settler) is considered. In the case of the residence time of sludge particles in the settler the model leads to a nonlinear age-dependent transport-diffusion with a nonlocal ... Keywords: Nonlocal condition, Optimal control, Settler model, Sludge concentration, Transport-diffusion equation

Burhan Pekta?

2009-03-01T23:59:59.000Z

454

Computational Science Technical Note CSTN-035 Spatial Emergence of Genotypical Tribes in an Animat Simulation Model  

E-Print Network (OSTI)

in an Animat Simulation Model K. A. Hawick and C. J. Scogings and H. A. James 2007 We observe the spontaneous Tribes in an Animat Simulation Model}, booktitle = {Proc. 2007 Winter Simulation Conference 2007 (WSC2007 Tribes in an Animat Simulation Model K.A. Hawick, C.J. Scogings and H.A. James Institute of Information

Hawick, Ken

455

Appendix F Cultural Resources, Including  

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

Appendix F Appendix F Cultural Resources, Including Section 106 Consultation STATE OF CALIFORNIA - THE RESOURCES AGENCY EDMUND G. BROWN, JR., Governor OFFICE OF HISTORIC PRESERVATION DEPARTMENT OF PARKS AND RECREATION 1725 23 rd Street, Suite 100 SACRAMENTO, CA 95816-7100 (916) 445-7000 Fax: (916) 445-7053 calshpo@parks.ca.gov www.ohp.parks.ca.gov June 14, 2011 Reply in Reference To: DOE110407A Angela Colamaria Loan Programs Office Environmental Compliance Division Department of Energy 1000 Independence Ave SW, LP-10 Washington, DC 20585 Re: Topaz Solar Farm, San Luis Obispo County, California Dear Ms. Colamaria: Thank you for seeking my consultation regarding the above noted undertaking. Pursuant to 36 CFR Part 800 (as amended 8-05-04) regulations implementing Section

456

Integrability study on a generalized (2+1)-dimensional variable-coefficient Gardner model with symbolic computation  

SciTech Connect

Gardner model describes certain nonlinear elastic structures, ion-acoustic waves in plasmas, and shear flows in ocean and atmosphere. In this paper, by virtue of the computerized symbolic computation, the integrability of a generalized (2+1)-dimensional variable-coefficient Gardner model is investigated. Painleve integrability conditions are derived among the coefficient functions, which reduce all the coefficient functions to be proportional only to {gamma}(t), the coefficient of the cubic nonlinear term u{sup 2}u{sub x}. Then, an independent transformation of the variable t transforms the reduced {gamma}(t)-dependent equation into a constant-coefficient integrable one. Painleve test shows that this is the only case when our original generalized (2+1)-dimensional variable-coefficient Gardner model is integrable.

Lue Xing; Zhang Haiqiang; Xu Tao; Li He [School of Science, Beijing University of Posts and Telecommunications, P.O. Box 122, Beijing 100876 (China); Tian Bo [School of Science, Beijing University of Posts and Telecommunications, P.O. Box 122, Beijing 100876 (China); State Key Laboratory of Software Development Environment, Beijing University of Aeronautics and Astronautics, Beijing 100191 (China); Key Laboratory of Information Photonics and Optical Communications (BUPT), Ministry of Education, Beijing University of Posts and Telecommunications, P.O. Box 128, Beijing 100876 (China)

2010-12-15T23:59:59.000Z

457

Computational fluid dynamic modelling of enhanced heat transfer in tubes with inserts.  

E-Print Network (OSTI)

??Heat transfer is an important process in many different industrial processes including oil refming and energy generation. A shell and tube heat exchanger is one… (more)

Osley, William Gruffydd

2014-01-01T23:59:59.000Z

458

Refining and Extending the Business Model with Information Technology: Dell Computer Corporation  

E-Print Network (OSTI)

on Dell’s relationship with Boeing was confirmed byauthor interviews with Boeing personnel. Kraemer, Kenneth L.include: ATL Products, the Boeing Company, Bristol-Myers

Kraemer, Kenneth L; Dedrick, Jason; Yamashiro, Sandra

1999-01-01T23:59:59.000Z

459

Computational Modeling of the Heart Objective: To give a presentation of about 60 minutes at the end of the week covering the key aspects of understanding the  

E-Print Network (OSTI)

Computational Modeling of the Heart Objective: To give a presentation of about 60 minutes at the end of the week covering the key aspects of understanding the heart by computational means, multilevel project is the so called physiome project (www.physiome.org), where the human heart is being

Goldschmidt, Christina

460

Computer program for Stirling-engine-performance calculations  

SciTech Connect

To support the development of the Stirling engine as a possible alternative to the automobile spark-ignition engine, the thermodynamic characteristics of the Stirling engine were analyzed and modeled on a computer. The computer model is documented. The documentation includes a user's manual, symbols list, a test case, comparison of model predictions with test results, and a description of the analytical equations used in the model.

Tew, R.C. Jr.

1983-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "including computer modeling" 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

SANDAC V computer electromagnetic interface characteristics: Problems and solutions. [Sandia Airborne Computer (SANDAC)  

SciTech Connect

Electromagnetic Interference (EMI) problems have resulted in the redesign of the SANDAC V computer case and shielding of its connecting cables. In this report are detailed discussions on the use of computer models and of the tests performed to solve the EMI problems. Included is documentation on the specific changes made to the SANDAC V computer case and the shielding done on the connecting cables. Also documented are the current EMI capabilities relative to MIL Std. 461.

Russell, G.A.

1991-06-01T23:59:59.000Z

462

Countries Gasoline Prices Including Taxes  

Gasoline and Diesel Fuel Update (EIA)

Countries (U.S. dollars per gallon, including taxes) Countries (U.S. dollars per gallon, including taxes) Date Belgium France Germany Italy Netherlands UK US 01/13/14 7.83 7.76 7.90 8.91 8.76 8.11 3.68 01/06/14 8.00 7.78 7.94 8.92 8.74 8.09 3.69 12/30/13 NA NA NA NA NA NA 3.68 12/23/13 NA NA NA NA NA NA 3.63 12/16/13 7.86 7.79 8.05 9.00 8.78 8.08 3.61 12/9/13 7.95 7.81 8.14 8.99 8.80 8.12 3.63 12/2/13 7.91 7.68 8.07 8.85 8.68 8.08 3.64 11/25/13 7.69 7.61 8.07 8.77 8.63 7.97 3.65 11/18/13 7.99 7.54 8.00 8.70 8.57 7.92 3.57 11/11/13 7.63 7.44 7.79 8.63 8.46 7.85 3.55 11/4/13 7.70 7.51 7.98 8.70 8.59 7.86 3.61 10/28/13 8.02 7.74 8.08 8.96 8.79 8.04 3.64 10/21/13 7.91 7.71 8.11 8.94 8.80 8.05 3.70 10/14/13 7.88 7.62 8.05 8.87 8.74 7.97 3.69

463

Sensitivity study of the assembly averaged thermal-hydraulic models of the MEKIN computer code in power transients / by Thomas Rodack [and] Lothar Wolf  

E-Print Network (OSTI)

The thermal-hydraulic (T-H) models and solution schemes employed by the MEKIN computer code have been examined. The effects of T-H input parameters on- predicted fuel temperatures and coolant densities were determined in ...

Rodack, Thomas

1977-01-01T23:59:59.000Z

464

CFD [computational fluid dynamics] And Safety Factors. Computer modeling of complex processes needs old-fashioned experiments to stay in touch with reality.  

SciTech Connect

Computational fluid dynamics (CFD) is recognized as a powerful engineering tool. That is, CFD has advanced over the years to the point where it can now give us deep insight into the analysis of very complex processes. There is a danger, though, that an engineer can place too much confidence in a simulation. If a user is not careful, it is easy to believe that if you plug in the numbers, the answer comes out, and you are done. This assumption can lead to significant errors. As we discovered in the course of a study on behalf of the Department of Energy's Savannah River Site in South Carolina, CFD models fail to capture some of the large variations inherent in complex processes. These variations, or scatter, in experimental data emerge from physical tests and are inadequately captured or expressed by calculated mean values for a process. This anomaly between experiment and theory can lead to serious errors in engineering analysis and design unless a correction factor, or safety factor, is experimentally validated. For this study, blending times for the mixing of salt solutions in large storage tanks were the process of concern under investigation. This study focused on the blending processes needed to mix salt solutions to ensure homogeneity within waste tanks, where homogeneity is required to control radioactivity levels during subsequent processing. Two of the requirements for this task were to determine the minimum number of submerged, centrifugal pumps required to blend the salt mixtures in a full-scale tank in half a day or less, and to recommend reasonable blending times to achieve nearly homogeneous salt mixtures. A full-scale, low-flow pump with a total discharge flow rate of 500 to 800 gpm was recommended with two opposing 2.27-inch diameter nozzles. To make this recommendation, both experimental and CFD modeling were performed. Lab researchers found that, although CFD provided good estimates of an average blending time, experimental blending times varied significantly from the average.

Leishear, Robert A.; Lee, Si Y.; Poirier, Michael R.; Steeper, Timothy J.; Ervin, Robert C.; Giddings, Billy J.; Stefanko, David B.; Harp, Keith D.; Fowley, Mark D.; Van Pelt, William B.

2012-10-07T23:59:59.000Z

465

National Ignition Facility computational fluid dynamics modeling and light fixture case studies  

SciTech Connect

This report serves as a guide to the use of computational fluid dynamics (CFD) as a design tool for the National Ignition Facility (NIF) program Title I and Title II design phases at Lawrence Livermore National Laboratory. In particular, this report provides general guidelines on the technical approach to performing and interpreting any and all CFD calculations. In addition, a complete CFD analysis is presented to illustrate these guidelines on a NIF-related thermal problem.

Martin, R.; Bernardin, J.; Parietti, L.; Dennison, B.

1998-02-01T23:59:59.000Z

466

WASTE-ACC: A computer model for analysis of waste management accidents  

SciTech Connect

In support of the U.S. Department of Energy`s (DOE`s) Waste Management Programmatic Environmental Impact Statement, Argonne National Laboratory has developed WASTE-ACC, a computational framework and integrated PC-based database system, to assess atmospheric releases from facility accidents. WASTE-ACC facilitates the many calculations for the accident analyses necessitated by the numerous combinations of waste types, waste management process technologies, facility locations, and site consolidation strategies in the waste management alternatives across the DOE complex. WASTE-ACC is a comprehensive tool that can effectively test future DOE waste management alternatives and assumptions. The computational framework can access several relational databases to calculate atmospheric releases. The databases contain throughput volumes, waste profiles, treatment process parameters, and accident data such as frequencies of initiators, conditional probabilities of subsequent events, and source term release parameters of the various waste forms under accident stresses. This report describes the computational framework and supporting databases used to conduct accident analyses and to develop source terms to assess potential health impacts that may affect on-site workers and off-site members of the public under various DOE waste management alternatives.

Nabelssi, B.K.; Folga, S.; Kohout, E.J.; Mueller, C.J.; Roglans-Ribas, J.

1996-12-01T23:59:59.000Z

467

E-Print Network 3.0 - aspen computer models Sample Search Results  

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

seedling presence performed well (overall accuracy 73... the accuracy of the logis- tic regression model describing aspen seedling pres- ence (described below... present (1)...

468

Computational Fluid Dynamics Study of Aerosol Transport and Deposition Mechanisms  

E-Print Network (OSTI)

In this work, various aerosol particle transport and deposition mechanisms were studied through the computational fluid dynamics (CFD) modeling, including inertial impaction, gravitational effect, lift force, interception, and turbophoresis, within...

Tang, Yingjie

2012-07-16T23:59:59.000Z

469

Model based control system design using sysML, simulink, and computer algebra system  

Science Journals Connector (OSTI)

The Systems Modeling Language (SysML) is a standard, general-purpose, modeling language formodel-based systems engineering (MBSE). SysML supports the specification, analysis, and design of a broad range of complex systems such as control systems. The ...

Takashi Sakairi; Eldad Palachi; Chaim Cohen; Yoichi Hatsutori; Junya Shimizu; Hisashi Miyashita

2013-01-01T23:59:59.000Z

470

Quantifying the role of chaperones in protein translocation by computational modelling  

E-Print Network (OSTI)

The molecular chaperone Hsp70 plays a central role in the import of cytoplasmic proteins into organelles, driving their translocation by binding them from the organellar interior. Starting from the experimentally-determined structure of the \\textit{E. coli} Hsp70, we computed, by means of molecular simulations, the effective free-energy profile for substrate translocation upon chaperone binding. We then used the resulting free energy to quantitatively characterize the kinetics of the import process, whose comparison with unassisted translocation highlights the essential role played by Hsp70 in importing cytoplasmic proteins.

Salvatore Assenza; Paolo De Los Rios; Alessandro Barducci

2014-11-25T23:59:59.000Z

471

Polymorphous computing fabric  

DOE Patents (OSTI)

Fabric-based computing systems and methods are disclosed. A fabric-based computing system can include a polymorphous computing fabric that can be customized on a per application basis and a host processor in communication with said polymorphous computing fabric. The polymorphous computing fabric includes a cellular architecture that can be highly parameterized to enable a customized synthesis of fabric instances for a variety of enhanced application performances thereof. A global memory concept can also be included that provides the host processor random access to all variables and instructions associated with the polymorphous computing fabric.

Wolinski, Christophe Czeslaw (Los Alamos, NM); Gokhale, Maya B. (Los Alamos, NM); McCabe, Kevin Peter (Los Alamos, NM)

2011-01-18T23:59:59.000Z

472

Computational modelling of the collective stochastic motion of Kinesin nano motors  

E-Print Network (OSTI)

We have developed a two dimensional stochastic molecular dynamics model for the description of intra cellular collective motion of bio motors, in particular Kinesins, on a microtubular track. The model is capable or reproducing the hand-over-hand mechanism of the directed motion along the microtubule. The model gives the average directed velocity and the current of Kinesins along the microtubule. It is shown that beyond a certain density of Kinesins, the average velocity and current undergo notable decrease which is due to formation of traffic jams in the system.

Yousef Jamali; M. Ebrahim Foulaadvand; H. Rafii Tabar

2010-06-21T23:59:59.000Z

473

E-Print Network 3.0 - adolescents computer modelling Sample Search...  

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

the Teenage Brain? Summary: of Medicine, who uses rats as a model to study substance abuse in human adolescents. Pleasure is not the only... clues to why adolescents seek out...

474

Lightweight 3D Modeling of Urban Buildings From Range Data Department of Computer Science  

E-Print Network (OSTI)

scanning, range data, segmentation, Google SketchUp, vectorization I. INTRODUCTION The 3D modeling of urban such as Google SketchUp. A key idea is that a simple set of extrusion and tapering operations applied to 2D

Wolberg, George

475

Turbulent closure and the modelling of fire by using computational fluid dynamics  

Science Journals Connector (OSTI)

...fire modelling. In Combustion fundamentals of fire (ed. G. Cox), pp...formation and combustion of soot in diesel engines. In Heat transfer in flames...diffusion flames. In Combustion fundamentals of fire (ed. G. Cox), pp...

1998-01-01T23:59:59.000Z

476

Computational models of trust and reputation : agents, evolutionary games, and social networks  

E-Print Network (OSTI)

Many recent studies of trust and reputation are made in the context of commercial reputation or rating systems for online communities. Most of these systems have been constructed without a formal rating model or much regard ...

Mui, Lik

2003-01-01T23:59:59.000Z

477

11.127 / 11.252 Computer Modeling for Investigation and Education, Spring 2003  

E-Print Network (OSTI)

Project-based subject in which students from multiple disciplines are encouraged to develop and investigate systems and ideas from their fields of study as they explore the process of building and testing models and ...

Klopfer, Eric

478

Microstructure-Based Computational Modeling of TRIP Steels with Dispersed Particles  

E-Print Network (OSTI)

in this study. The ideas surrounding the behavior of transformation induced plasticity (TRIP) steels and particle reinforced composites are combined and investigated. A finite element model (FEM) is created to investigate the effects of dispersed ceramic...

Diaz, Sara Cristina

2012-10-19T23:59:59.000Z

479

Evaluating and developing parameter optimization and uncertainty analysis methods for a computationally intensive distributed hydrological model  

E-Print Network (OSTI)

This study focuses on developing and evaluating efficient and effective parameter calibration and uncertainty methods for hydrologic modeling. Five single objective optimization algorithms and six multi-objective optimization algorithms were tested...

Zhang, Xuesong

2009-05-15T23:59:59.000Z

480

Computer model of the lead/acid starter battery in automobiles  

Science Journals Connector (OSTI)

A large increase in the power required on-board automobiles is expected in the years to come. More complex electric networks will then be required to provide adequate reliability and minimal fuel consumption. The scope of this study is to present a model for an automotive battery introduced in a software package that is developed to simulate current and future electrical architecture. This model is based on an evaluation of battery e.m.f., over-voltage and capacitive behaviour. A description is given of the test protocol used to develop laws and to validate the model. The model is tested successfully both in starting phases and under real vehicle running conditions.

H. Duval

1995-01-01T23:59:59.000Z

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481

Computers & Geosciences 29 (2003) 351359 A case against Kd-based transport models: natural attenuation  

E-Print Network (OSTI)

attenuation at a mill tailings site Chen Zhu* Department of Geology and Planetary Science, University)-based transport model. The study site is a contaminated groundwater aquifer underneath a uranium mill tailings

Polly, David

482

Computational tools for probing interaction effects in multiple linear regression, multilevel modeling, and latent curve analysis  

E-Print Network (OSTI)

Simple slopes, regions of significance, and confidence bands are commonly used to evaluate interactions in multiple linear regression (MLR) models, and the use of these techniques has recently been extended to multilevel ...

Preacher, K. J.; Curran, Patrick J.; Bauer, D. J.

2007-04-09T23:59:59.000Z

483

Tools of computational neuroscience : Models of neurons D&A Chapter 5.  

E-Print Network (OSTI)

to model neurons. + ++ - -- im V Cm dV dt = - ion Iion + Iext(t) · From this we can determine how V changes (diffusion and electric forces) would cancel. Point neurons (2) Cm dV dt = - ion Iion + Iext(t) Ii = gi to move Vm towards Ei Hodgkin-Huxley Model (in a nutshell) Cm dV dt = - ion Iion + Iext(t) · describe

Seriès, Peggy

484

Computational modeling and design of actively-cooled microvascular materials Soheil Soghrati a,b  

E-Print Network (OSTI)

to the optimization study, the IGFEM solver is validated through comparison with infrared measurements of the thermal of such systems to a broad field including autonomic materials [6], biotechnology [7,8], chemical reactors [9 in two specific ways: (i) by direct extraction of heat from the thermally loaded material, and (ii

Sottos, Nancy R.

485

Computational modeling and analysis of airflow in a tritium storage room  

SciTech Connect

In this study, a commercial computational fluid dynamics (CFD) code, CFX-5.5, was utilized to assess flow field characteristics, and to simulate tritium gas releases and subsequent transport in a storage room in the tritium handling facility at Los Alamos. This study was done with mesh refinement and results compared. The results show a complex, ventilation-induced flow field with vortices, velocity gradients, and stagnant air pockets. This paper also explains the timedependent gas dispersion results. The numerical analysis method used in this study provides important information that is possible to be validated with an experimental technique of aerosol tracer measurement method frequently used at Los Alamos. Application of CFD can have a favorable impact on the design of ventilation systems and worker safety with consideration to facility costs.

Chen, Z. (Zukun); Konecni, S. (Snezana); Whicker, J. J. (Jeffrey J.)

2003-01-01T23:59:59.000Z

486

Two-dimensional computational modeling of sodium boiling in simulated LMFBR fuel-pin bundles  

SciTech Connect

Extensive sodium boiling tests have been carried out in two simulated LMFBR fuel pin bundles in the Thermal-Hydraulic Out-of-Reactor Safety (THORS) Facility at Oak Ridge National Laboratory. Experimental results from a 19-pin bundle (THORS Bundle 6A) have been previously reported, and experimental results from a 61-pin bundle (THORS Bundle 9) will be reported soon. The results discussed here are from the 19-pin bundle. Preliminary analysis has shown that the computational methods used and conclusions reached are equally valid for the 61-pin bundle, as well as the 19-pin in-reactor Sodium Loop Safety Facility (SLSF) W-1 experiment. The main result of THORS sodium boiling experimentation is that boiling behavior is determined by two-dimensional effects, i.e., the rates of mass, momentum and energy transfer in the direction perpendicular to the axes of the fuel pins.

Dearing, J.F.

1981-01-01T23:59:59.000Z

487

Computers and Computer Networks  

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

and Computer Networks and Computer Networks Computer Science documentation, etc. Computer Science Research and Services at the Lab Super Computing Computer Graphics Computer & Internet information via yahoo.com, categorized by subject Perl UNIX documentation Shareware sites MBONE and Videoconferencing Computer Networks and related documentation Computer Documentation World Wide Web UNIX Documentation TeX, LaTeX FAQ, documents, archives, etc. MacInTouch -- current Macintosh information, from vendor & others Shareware sites The Free On-line Dictionary of Computing PDS: The Performance Database Server of Computer Benchmark Return to Top Return to Top Newsgroups, USEnet, and Mailing Lists Usenet (Internet News Groups) Mailing list software & information Return to Top Return to Top

488

Event-based computer simulation model of Aspect-type experiments strictly satisfying Einstein's locality conditions  

E-Print Network (OSTI)

Inspired by Einstein-Podolsky-Rosen-Bohm experiments with photons, we construct an event-based simulation model in which every essential element in the ideal experiment has a counterpart. The model satisfies Einstein's criteria of local causality and does not rely on concepts of quantum and probability theory. We consider experiments in which the averages correspond to those of a singlet and product state of a system of two $S=1/2$ particles. The data is analyzed according to the experimental procedure, employing a time window to identify pairs. We study how the time window and the passage time of the photons, which depends on the relative angle between their polarization and the polarizer's direction, influences the correlations, demonstrating that the properties of the optical elements in the observation stations affect the correlations although the stations are separated spatially and temporarily. We show that the model can reproduce results which are considered to be intrinsically quantum mechanical.

De Raedt, Hans; Michielsen, Kristel; Keimpema, Koenraad; Miyashita, Seiji

2007-01-01T23:59:59.000Z

489

Event-based computer simulation model of Aspect-type experiments strictly satisfying Einstein's locality conditions  

E-Print Network (OSTI)

Inspired by Einstein-Podolsky-Rosen-Bohm experiments with photons, we construct an event-based simulation model in which every essential element in the ideal experiment has a counterpart. The model satisfies Einstein's criteria of local causality and does not rely on concepts of quantum and probability theory. We consider experiments in which the averages correspond to those of a singlet and product state of a system of two $S=1/2$ particles. The data is analyzed according to the experimental procedure, employing a time window to identify pairs. We study how the time window and the passage time of the photons, which depends on the relative angle between their polarization and the polarizer's direction, influences the correlations, demonstrating that the properties of the optical elements in the observation stations affect the correlations although the stations are separated spatially and temporarily. We show that the model can reproduce results which are considered to be intrinsically quantum mechanical.

Hans De Raedt; Koen De Raedt; Kristel Michielsen; Koenraad Keimpema; Seiji Miyashita

2007-12-16T23:59:59.000Z

490

CUDA programs for GPU computing of Swendsen-Wang multi-cluster spin flip algorithm: 2D and 3D Ising, Potts, and XY models  

E-Print Network (OSTI)

We present sample CUDA programs for the GPU computing of the Swendsen-Wang multi-cluster spin flip algorithm. We deal with the classical spin models; the Ising model, the $q$-state Potts model, and the classical XY model. As for the lattice, both the 2D (square) lattice and the 3D (simple cubic) lattice are treated. We already reported the idea of the GPU implementation for 2D models [Comput. Phys. Commun. 183 (2012) 1155-1161]. We here explain the details of sample programs, and discuss the performance of the present GPU implementation for the 3D Ising and XY models. We also show the calculated results of the moment ratio for these models, and discuss phase transitions.

Komura, Yukihiro

2014-01-01T23:59:59.000Z

491

Computing and Computational Sciences Directorate - National Center...  

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

Big Data Product Portfolio Research team stays ahead of the computing curve in monumental climate modeling project Energy labs show off high-tech innovation Alamudun receives award...

492

CDA6530: Performance Models of Computers and Networks (Fall 2013) Project 2: Using Matlab Simulink to derive numerical solution for differential equations  

E-Print Network (OSTI)

CDA6530: Performance Models of Computers and Networks (Fall 2013) Project 2: Using Matlab Simulink matlab simulink from the example of the simple worm propagation modeling in class. Now you are asked to derive the numerical solutions for more complicated differential equations. If you cannot access Matlab

Zou, Cliff C.

493

CDA6530: Performance Models of Computers and Networks (Fall 2012) Project 2: Using Matlab Simulink to derive numerical solution for differential equations  

E-Print Network (OSTI)

CDA6530: Performance Models of Computers and Networks (Fall 2012) Project 2: Using Matlab SimulinkCourse) You have learned matlab simulink from the example of the simple worm propagation modeling in class. If you cannot access Matlab Simulink, you can use an equivalent free software 'Xcos' (similar to Simulink

Zou, Cliff C.

494

CDA6530: Performance Models of Computers and Networks (Fall 2011) Project 2: Using Matlab Simulink to derive numerical solution for differential equations  

E-Print Network (OSTI)

CDA6530: Performance Models of Computers and Networks (Fall 2011) Project 2: Using Matlab Simulink learned matlab simulink from the example of the simple worm propagation modeling in class. Now you submit this project assignment via webcourse. You should attach a Winzip file containing a document (such

Zou, Cliff C.

495

Tactic-Based Motion Modelling and Multi-Sensor Tracking Computer Science Department  

E-Print Network (OSTI)

grabbing and kicking a ball, the motion model of the ob- ject becomes complex, and dependent on the robot of wheel actuators and dynamic balancing. Segway RMP, or Robot Mobility Platform, provides an extensible to track the most interesting objects (a ball, in this paper) of relevance to the robot. We do not discuss

496

Combining Computer Models to Account for Mass Loss in Stellar Evolution  

E-Print Network (OSTI)

relies on complicated models of the physical aging processes of stars Like a sampling distribution stage as white dwarfs #12;Evolution of a Sun-like Star 1. Main sequence powered by hydrogen fusion 2 of evolution see a snapshot of stars in different stages of evolution #12;Temperature Absolute

Wolfe, Patrick J.

497

Back to Exploration 2008 CSPG CSEG CWLS Convention 1 A Computational Model of Catalyzed Carbon Sequestration  

E-Print Network (OSTI)

explores the feasibility of catalysis-based carbon sequestration by efficiently and accurately modeling that this method can be scaled to accurately predict the efficacy of such systems for carbon sequestration to help find the most cost effective methods possible. Most carbon sequestration methods are capture

Spiteri, Raymond J.

498

Literacy effects on language and vision: Emergent effects from an amodal shared resource (ASR) computational model  

Science Journals Connector (OSTI)

Abstract Learning to read and write requires an individual to connect additional orthographic representations to pre-existing mappings between phonological and semantic representations of words. Past empirical results suggest that the process of learning to read and write (at least in alphabetic languages) elicits changes in the language processing system, by either increasing the cognitive efficiency of mapping between representations associated with a word, or by changing the granularity of phonological processing of spoken language, or through a combination of both. Behavioural effects of literacy have typically been assessed in offline explicit tasks that have addressed only phonological processing. However, a recent eye tracking study compared high and low literate participants on effects of phonology and semantics in processing measured implicitly using eye movements. High literates’ eye movements were more affected by phonological overlap in online speech than low literates, with only subtle differences observed in semantics. We determined whether these effects were due to cognitive efficiency and/or granularity of speech processing in a multimodal model of speech processing – the amodal shared resource model (ASR, Smith, Monaghan, & Huettig, 2013a,b). We found that cognitive efficiency in the model had only a marginal effect on semantic processing and did not affect performance for phonological processing, whereas fine-grained versus coarse-grained phonological representations in the model simulated the high/low literacy effects on phonological processing, suggesting that literacy has a focused effect in changing the grain-size of phonological mappings.

Alastair C. Smith; Padraic Monaghan; Falk Huettig

2014-01-01T23:59:59.000Z

499

Promise and challenge of high-performance computing, with examples from molecular modelling  

Science Journals Connector (OSTI)

...of chemical processes, e.g. by...physical, chemical and biological...modelling and simulation in science...programs such as MatLab) in the first...educational process will it be...and molecular processes that will be...Division of Chemical Sciences...little.pdf. Bailey...

2002-01-01T23:59:59.000Z

500

Computationally efficient algorithms for modelling thermal degradation and spiking phenomena in polymeric materials  

E-Print Network (OSTI)

resistance are the key factors that determine a wide spread success of these materials (Flipsen et al., 1996 in polymeric materials R.V.N. Melnik * Faculty of Science and Engineering, Mads Clausen Institute, University are interested in one such problem, namely in the modelling of curing dynamics of polymeric materials

Melnik, Roderick