Sample records for time-lapse joint inversion

  1. Time-lapse Joint Inversion of Geophysical Data and its Applications...

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

    Time-lapse Joint Inversion of Geophysical Data and its Applications to Geothermal Prospecting Time-lapse Joint Inversion of Geophysical Data and its Applications to Geothermal...

  2. Time-lapse Joint Inversion of Geophysical Data and its Applications...

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

    at Pagosa Springs (CO) * New method of time lapse geophysics * New method to monitor fracking Summary 16 | US DOE Geothermal Office eere.energy.gov Timeline: Budget: Project...

  3. Time-lapse gravity: A numerical demonstration using robust inversion and joint interpretation of 4D surface and borehole data

    E-Print Network [OSTI]

    seismic sur- veys. Results hint that the true value of time-lapse gravity as an additional tool and ongoing sensor technologies, combined with advances in computing power and robust inversion, can extract successful measure of fluid movement with time-lapse gravity experiments, although poorly documented

  4. Full wavefield inversion methods for monitoring time-lapse subsurface velocity changes

    E-Print Network [OSTI]

    Yang, Di, Ph. D. Massachusetts Institute of Technology

    2014-01-01T23:59:59.000Z

    Quantitative measurements of seismic velocity changes from time-lapse seismic experiments provide dynamic information about the subsurface that improves the understanding of the geology and reservoir properties. In this ...

  5. Stochastic and Deterministic Inversion Methods for History Matching of Production and Time-Lapse Seismic Data

    E-Print Network [OSTI]

    Watanabe, Shingo

    2013-08-26T23:59:59.000Z

    localization method to improve data assimilation performance while capturing geologic continuities that affect the flow dynamics and preserving model variability among the ensemble of models. For the streamline-based inversion method, we derived saturation...

  6. Final Report: Improved Site Characterization And Storage Prediction Through Stochastic Inversion Of Time-Lapse Geophysical And Geochemical Data

    SciTech Connect (OSTI)

    Ramirez, A; Mcnab, W; Hao, Y; White, D; Johnson, J

    2011-04-14T23:59:59.000Z

    During the last months of this project, our project activities have concentrated on four areas: (1) performing a stochastic inversion of pattern 16 seismic data to deduce reservoir bulk/shear moduli and density; the need for this inversion was not anticipated in the original scope of work, (2) performing a stochastic inversion of pattern 16 seismic data to deduce reservoir porosity and permeability, (3) complete the software needed to perform geochemical inversions and (4) use the software to perform stochastic inversion of aqueous chemistry data to deduce mineral volume fractions. This report builds on work described in progress reports previously submitted (Ramirez et al., 2009, 2010, 2011 - reports fulfilled the requirements of deliverables D1-D4) and fulfills deliverable D5: Field-based single-pattern simulations work product. The main challenge with our stochastic inversion approach is its large computational expense, even for single reservoir patterns. We dedicated a significant level of effort to improve computational efficiency but inversions involving multiple patterns were still intractable by project's end. As a result, we were unable to fulfill Deliverable D6: Field-based multi-pattern simulations work product.

  7. Time-lapse Joint Inversion of Geophysical Data and its Applications to

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOriginEducationVideoStrategic|Industrial Sector,Department ThirdCosts | DepartmentTime-Off

  8. Jaguar/Kraken time lapse

    SciTech Connect (OSTI)

    2009-11-17T23:59:59.000Z

    Time lapse video of the upgrade to ORNL's Jaguar and the University of Tennessee's Kraken, the world's fastest and third-fastest supercomputers. For more information, please visit www.nccs.gov.

  9. Stochastic Joint Inversion for Integrated Data Interpretation...

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

    Stochastic Joint Inversion for Integrated Data Interpretation in Geothermal Exploration Stochastic Joint Inversion for Integrated Data Interpretation in Geothermal Exploration...

  10. Simulation of production and elastic properties of reservoirs to validate time-lapse seismics.

    E-Print Network [OSTI]

    Guerin, Gilles

    , including the 3D seismic processing and inversion, and the preliminary time- lapse interpretation. We-lapse seismics. 3.1 Introduction Time-lapse, or 4-D, seismic monitoring is an integrated reservoir exploitation technique based on the analysis of successive 3-D seismic surveys. Differences over time in seismic

  11. New Siemens Research Turbine - time lapse

    SciTech Connect (OSTI)

    None

    2009-01-01T23:59:59.000Z

    The National Renewable Energy Laboratory (NREL) and Siemens Energy Inc. recently commissioned a new 2.3 megawatt Siemens wind turbine at NREL's National Wind Technology Center. This video shows a time lapse of the installation. The turbine is the centerpiece of a multi-year project to study the performance and aerodynamics of a new class of large, land-based machines — in what will be the biggest government-industry research partnership for wind power generation ever undertaken in the U.S.

  12. Joint inversion of electrical and seismic data for Fracture char...

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

    Joint inversion of electrical and seismic data for Fracture char. and Imaging of Fluid Flow in Geothermal Systems Joint inversion of electrical and seismic data for Fracture char....

  13. Time-lapse seismic monitoring of subsurface fluid flow

    E-Print Network [OSTI]

    Yuh, Sung H.

    2004-09-30T23:59:59.000Z

    Time-lapse seismic monitoring repeats 3D seismic imaging over a reservoir to map fluid movements in a reservoir. During hydrocarbon production, the fluid saturation, pressure, and temperature of a reservoir change, thereby altering the acoustic...

  14. Multiphase fluid flow and time lapse seismics UNLP, 11 Octubre de ...

    E-Print Network [OSTI]

    santos

    Time-lapse seismic surveys aim to monitor the migration and dispersal of the CO2 plume after injection. Multiphase fluid flow and time lapse seismics – p. 3 ...

  15. Biomarkers identified with time-lapse imaging: discovery, validation, and

    E-Print Network [OSTI]

    by time-lapse imaging and correlated with clinical outcomes, may provide embryologists with new-lapse marker, it focuses on the criteria necessary for their successful integration into clinical practice, including [1] statistical and biological significance, [2] validation through prospec- tive clinical studies

  16. Joint inversion of electrical and seismic data for Fracture char...

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

    Joint inversion of electrical and seismic data for Fracture char. and Imaging of Fluid Flow in Geothermal Systems Michael Batzle, PI Colorado School of Mines Track Name: Fluid...

  17. Multiphase fluid flow and time lapse UNLP, 11 Octubre de 2012

    E-Print Network [OSTI]

    Santos, Juan

    and time lapse seismics ­ p. #12;Introduction. III The analysis of CO2 underground storage safety and time lapse seismics ­ p. #12;Introduction. I Storage of CO2 in geological formations is a procedure project: Sleipner gas field (North Sea). Multiphase fluid flow and time lapse seismics ­ p. #12

  18. SPECTRAL DECOMPOSITION APPLIED TO TIME-LAPSE SEISMIC INTERPRETATION AT RULISON FIELD,

    E-Print Network [OSTI]

    SPECTRAL DECOMPOSITION APPLIED TO TIME-LAPSE SEISMIC INTERPRETATION AT RULISON FIELD, GARFIELD focuses on the application of this technique to time-lapse seismic interpretation using nine-component 4D-lapse interpretation through a cross equalization process. I analyzed two time-lapse pairs of seismic surveys: 2003

  19. INTEGRATION OF ROCK PHYSICS AND RESERVOIR SIMULATION FOR THE INTERPRETATION OF TIME-LAPSE

    E-Print Network [OSTI]

    INTEGRATION OF ROCK PHYSICS AND RESERVOIR SIMULATION FOR THE INTERPRETATION OF TIME-LAPSE SEISMIC is 15% to 20%, and should be detected in the time-lapse seismic data. Through interpretation of P This thesis research integrates reservoir simulation with time-lapse (4D) seismic monitoring of reservoir

  20. Why perform time-lapse seismic monitoring? Is it to ver-ify the reservoir model? No! We should conduct time-lapse

    E-Print Network [OSTI]

    the Teal South time-lapse multicomponent (4-D/4-C) study, in Eugene Island Block 354 in the Gulf of Mexico by Texaco, has been continued through a consortium organized by the Energy Research Clearing House. Some

  1. USING TIME-LAPSE SEISMIC MEASUREMENTS TO IMPROVE FLOW MODELING OF CO2 INJECTION

    E-Print Network [OSTI]

    Marly. The EOR process in the RCP section of the Weyburn Field uses CO2 and water injection to displaceUSING TIME-LAPSE SEISMIC MEASUREMENTS TO IMPROVE FLOW MODELING OF CO2 INJECTION IN THE WEYBURN, particularly CO2. Time lapse seismic monitoring has motivated changes to the reservoir description in a flow

  2. The maximum time interval of time-lapse photography for monitoring construction operations

    E-Print Network [OSTI]

    Choi, Ji Won

    2005-11-01T23:59:59.000Z

    and productivity. In order to accomplish the research goal, brickwork of five different construction sites was videotaped. Various interval time-lapse photographs were generated from each video. Worker?s activity in these photographs was examined and graded...

  3. Computational image analysis of subcellular dynamics in time-lapse fluorescence microscopy

    E-Print Network [OSTI]

    Huang, Austin V., 1980-

    2005-01-01T23:59:59.000Z

    The use of image segmentation and motion tracking algorithms was adapted for analyzing time-lapse data of cells with fluorescently labeled protein. Performance metrics were devised and algorithm parameters were matched to ...

  4. Direct Reservoir Parameter Estimation Using Joint Inversion of Marine Seismic AVA & CSEM Data

    E-Print Network [OSTI]

    2005-01-01T23:59:59.000Z

    estimation of reservoir parameters from geophysical data isthe seismic data fit at times below the reservoir. InversionReservoir Parameter Estimation Using Joint Inversion of Marine Seismic AVA & CSEM Data

  5. Time lapse seismic signal analysis for Cranfield, MS, EOR and CCS site Ditkof, J.1

    E-Print Network [OSTI]

    Texas at Austin, University of

    -delay along a horizon below the reservoir. Keywords: time lapse, 4D seismic, CO2 sequestration, EOR, seismic under continuous CO2 injection by Denbury Onshore LLC since 2008. To date, more than 3 million tons of CO2 remain in the subsurface. In 2007 and 2010, 3D seismic surveys were shot and an initial 4D

  6. Feasibility of monitoring gas hydrate production with time-lapse VSP

    SciTech Connect (OSTI)

    Kowalsky, M.B.; Nakagawa, S.; Moridis, G.J.

    2009-11-01T23:59:59.000Z

    In this work we begin to examine the feasibility of using time-lapse seismic methods-specifically the vertical seismic profiling (VSP) method-for monitoring changes in hydrate accumulations that are predicted to occur during production of natural gas.

  7. Instruments and Methods Glacier velocities from time-lapse photos: technique development

    E-Print Network [OSTI]

    Box, Jason E.

    Instruments and Methods Glacier velocities from time-lapse photos: technique development and first West Greenland marine-terminating glaciers as part of the Extreme Ice Survey (EIS). EIS cameras began imaging the lowest 4 km2 of the glacier at hourly intervals throughout sunlit periods of the year

  8. P-WAVE TIME-LAPSE SEISMIC DATA INTERPRETATION AT RULISON FIELD, PICEANCE BASIN, COLORADO

    E-Print Network [OSTI]

    P-WAVE TIME-LAPSE SEISMIC DATA INTERPRETATION AT RULISON FIELD, PICEANCE BASIN, COLORADO by Donald-lapse seismic surveys, shot by the Reservoir Characterization Project in the fall of 2003 and 2004, at Rulison seismic can monitor tight gas reservoirs, to a limited extent, over a short period of time. Repeat surveys

  9. Oxygen driven reconstruction dynamics of Ni,,977... measured by time-lapse scanning tunneling microscopy

    E-Print Network [OSTI]

    Sibener, Steven

    Oxygen driven reconstruction dynamics of Ni,,977... measured by time-lapse scanning tunneling-lapse scanning tunneling microscopy STM has been used to observe the oxygen induced reconstruction behavior of Ni for the merging of steps in the presence of small amounts of adsorbed oxygen, less than 2% of a monolayer. Point

  10. Constraining the density of CO2 within the Utsira formation using time-lapse gravity measurements

    E-Print Network [OSTI]

    Nooner, Scott

    best fit a high temperature forward model based on the seismically determined CO2 geometry, suggesting to study the behavior and physical properties of the injected CO2. The gravity measurements show1 Constraining the density of CO2 within the Utsira formation using time-lapse gravity measurements

  11. Monitoring CO 2 sequestration into deep saline aquifer and associated salt intrusion using coupled multiphase flow modeling and time lapse electrical resistivity tomography

    SciTech Connect (OSTI)

    Chuan Lu; CHI Zhang; Hai Hanag; Timothy C. Johnson

    2014-04-01T23:59:59.000Z

    Successful geological storage and sequestration of carbon dioxide (CO2) require efficient monitoring of the migration of CO2 plume during and after large-scale injection in order to verify the containment of the injected CO2 within the target formation and to evaluate potential leakage risk. Field studies have shown that surface and cross-borehole electrical resistivity tomography (ERT) can be a useful tool in imaging and characterizing solute transport in heterogeneous subsurface. In this synthetic study, we have coupled a 3-D multiphase flow model with a parallel 3-D time-lapse ERT inversion code to explore the feasibility of using time-lapse ERT for simultaneously monitoring the migration of CO2 plume in deep saline formation and potential brine intrusion into shallow fresh water aquifer. Direct comparisons of the inverted CO2 plumes resulting from ERT with multiphase flow simulation results indicate the ERT could be used to delineate the migration of CO2 plume. Detailed comparisons on the locations, sizes and shapes of CO2 plume and intruded brine plumes suggest that ERT inversion tends to underestimate the area review of the CO2 plume, but overestimate the thickness and total volume of the CO2 plume. The total volume of intruded brine plumes is overestimated as well. However, all discrepancies remain within reasonable ranges. Our study suggests that time-lapse ERT is a useful monitoring tool in characterizing the movement of injected CO2 into deep saline aquifer and detecting potential brine intrusion under large-scale field injection conditions.

  12. Hybrid optimization for lithologic inversion and time-lapse monitoring using a binary formulation

    E-Print Network [OSTI]

    of prior geologic information and rapid build- up of large-scale model features, whereas the latter guides topology creates difficulties when regional field or small-scale resid- uals resulting from shallow sources

  13. Entropy-Bayesian Inversion of Time-Lapse Tomographic GPR data for

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8, 2000ConsumptionInnovation PortalHanford SiteMonitoring Dielectric

  14. Entropy-Bayesian Inversion of Time-Lapse Tomographic GPR data for

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8, 2000ConsumptionInnovation PortalHanford SiteMonitoring

  15. Data-driven estimation of the sensitivity of target-oriented time-lapse seismic imaging to source geometry

    E-Print Network [OSTI]

    Fehler, Michael

    The goal of time-lapse imaging is to identify and characterize regions in which the earth’s material properties have changed between surveys. This requires an effective deployment of sources and receivers to monitor the ...

  16. Carbon sequestration monitoring with acoustic double-difference waveform inversion: A case study on SACROC walkaway VSP data

    SciTech Connect (OSTI)

    Huang, Lianjie [Los Alamos National Laboratory; Fehler, Michael [MIT; Malcolm, Alison [MIT; Yang, Di [MIT

    2011-01-01T23:59:59.000Z

    Geological carbon sequestration involves large-scale injection of carbon dioxide into underground geologic formations and is considered as a potential approach for mitigating global warming. Changes in reservoir properties resulting from the CO{sub 2} injection and migration can be characterized using waveform inversions of time-lapse seismic data. The conventional approach for analysis using waveform tomography is to take the difference of the images obtained using baseline and subsequent time-lapse datasets that are inverted independently. By contrast, double-difference waveform inversion uses timelapse seismic datasets to jointly invert for reservoir changes. We apply this method to a field time-lapse walkaway VSP data set acquired in 2008 and 2009 for monitoring CO{sub 2} injection at an enhanced oil recovery field at SACROC, Texas. The double-difference waveform inversion gives a cleaner and more easily interpreted image of reservoir changes, as compared to that obtained with the conventional scheme. Our results from the applicatoin of acoustic double-difference waveform tomography shows some zones with decreased P-wave velocity within the reservoir due to CO{sub 2} injection and migration.

  17. Direct Reservoir Parameter Estimation Using Joint Inversion ofMarine Seismic AVA&CSEM Data

    SciTech Connect (OSTI)

    Hoversten, G. Michael; Cassassuce, Florence; Gasperikova, Erika; Newman,Gregory A.; Rubin, Yoram; Zhangshuan, Hou; Vasco, Don

    2005-01-12T23:59:59.000Z

    A new joint inversion algorithm to directly estimate reservoir parameters is described. This algorithm combines seismic amplitude versus angle (AVA) and marine controlled source electromagnetic (CSEM) data. The rock-properties model needed to link the geophysical parameters to the reservoir parameters is described. Errors in the rock-properties model parameters, measured in percent, introduce errors of comparable size in the joint inversion reservoir parameter estimates. Tests of the concept on synthetic one-dimensional models demonstrate improved fluid saturation and porosity estimates for joint AVA-CSEM data inversion (compared to AVA or CSEM inversion alone). Comparing inversions of AVA, CSEM, and joint AVA-CSEM data over the North Sea Troll field, at a location with well control, shows that the joint inversion produces estimated gas saturation, oil saturation and porosity that is closest (as measured by the RMS difference, L1 norm of the difference, and net over the interval) to the logged values whereas CSEM inversion provides the closest estimates of water saturation.

  18. Spatially-Variant Tikhonov Regularization for Double-Difference Waveform Inversion

    SciTech Connect (OSTI)

    Lin, Youzuo [Los Alamos National Laboratory; Huang, Lianjie [Los Alamos National Laboratory; Zhang, Zhigang [Los Alamos National Laboratory

    2011-01-01T23:59:59.000Z

    Double-difference waveform inversion is a potential tool for quantitative monitoring for geologic carbon storage. It jointly inverts time-lapse seismic data for changes in reservoir geophysical properties. Due to the ill-posedness of waveform inversion, it is a great challenge to obtain reservoir changes accurately and efficiently, particularly when using time-lapse seismic reflection data. Regularization techniques can be utilized to address the issue of ill-posedness. The regularization parameter controls the smoothness of inversion results. A constant regularization parameter is normally used in waveform inversion, and an optimal regularization parameter has to be selected. The resulting inversion results are a trade off among regions with different smoothness or noise levels; therefore the images are either over regularized in some regions while under regularized in the others. In this paper, we employ a spatially-variant parameter in the Tikhonov regularization scheme used in double-difference waveform tomography to improve the inversion accuracy and robustness. We compare the results obtained using a spatially-variant parameter with those obtained using a constant regularization parameter and those produced without any regularization. We observe that, utilizing a spatially-variant regularization scheme, the target regions are well reconstructed while the noise is reduced in the other regions. We show that the spatially-variant regularization scheme provides the flexibility to regularize local regions based on the a priori information without increasing computational costs and the computer memory requirement.

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

    E-Print Network [OSTI]

    Shekhar, Ravi

    2009-05-15T23:59:59.000Z

    and amplitude variation with offset (AVO) results for our example model predicts that CO2 is easier to detect than brine in the fractured reservoirs. The effects of geochemical processes on seismics are simulated by time-lapse modeling for t = 1000 years. My...

  20. ENVIRONMENTAL MONITORING OF LEAKS USING TIME LAPSED LONG ELECTRODE ELECTRICAL RESISTIVITY

    SciTech Connect (OSTI)

    RUCKER DF; FINK JB; LOKE MH; MYERS DA

    2009-11-05T23:59:59.000Z

    Highly industrialized areas pose significant challenges for surface based electrical resistivity characterization and monitoring due to the high degree of metallic infrastructure. The infrastructure is typically several orders of magnitude more conductive than the desired targets, preventing the geophysicist from obtaining a clear picture of the subsurface. These challenges may be minimized if steel-cased wells are used as long electrodes. We demonstrate a method of using long electrodes in a complex nuclear waste facility to monitor a simulated leak from an underground storage tank. The leak was simulated by injecting high conductivity fluid in a perforated well and the resistivity measurements were made before and after the leak test. The data were processed in four dimensions, where a regularization procedure was applied in both the time and space domains. The results showed a lowered resistivity feature develop south of the injection site. The time lapsed regularization parameter had a strong influence on the differences in inverted resistivity between the pre and post datasets, potentially making calibration of the results to specific hydrogeologic parameters difficult.

  1. ENVIRONMENTAL MONITORING OF LEAKS USING TIME LAPSED LONG ELECTRODE ELECTRICAL RESISTIVITY

    SciTech Connect (OSTI)

    MYERS DA; RUCKER DF; FINK JB; LOKE MH

    2009-12-16T23:59:59.000Z

    Highly industrialized areas pose challenges for surface electrical resistivity characterization due to metallic infrastructure. The infrastructure is typically more conductive than the desired targets and will mask the deeper subsurface information. These challenges may be minimized if steel-cased wells are used as long electrodes in the area near the target. We demonstrate a method of using long electrodes to electrically monitor a simulated leak from an underground storage tank with both synthetic examples and a field demonstration. The synthetic examples place a simple target of varying electrical properties beneath a very low resistivity layer. The layer is meant to replicate the effects of infrastructure. Both surface and long electrodes are tested on the synthetic domain. The leak demonstration for the field experiment is simulated by injecting a high conductivity fluid in a perforated well within the S tank farm at Hanford, and the resistivity measurements are made before and after the leak test. All data are processed in four dimensions, where a regularization procedure is applied in both the time and space domains. The synthetic test case shows that the long electrode ERM could detect relative changes in resistivity that are commensurate with the differing target properties. The surface electrodes, on the other hand, had a more difficult time matching the original target's footprint. The field results shows a lowered resistivity feature develop south of the injection site after cessation of the injections. The time lapsed regularization parameter has a strong influence on the differences in inverted resistivity between the pre and post injection datasets, but the interpretation of the target is consistent across all values of the parameter. The long electrode ERM method may provide a tool for near real-time monitoring of leaking underground storage tanks.

  2. Joint stochastic inversion of geophysical data for reservoir parameter estimation Jinsong Chen* and G. Michael Hoversten, Lawrence Berkeley National Laboratory

    E-Print Network [OSTI]

    Chen, Jinsong

    Joint stochastic inversion of geophysical data for reservoir parameter estimation Jinsong Chen the stochastic framework, both reservoir parameters and geophysical attributes at unsampled locations. Introduction Conventional methods for reservoir parameter estimation using multiple sources of geophysical data

  3. Joint inversion of crosshole radar and seismic traveltimes acquired at the South Oyster BacterialTransport Site

    SciTech Connect (OSTI)

    Linde, Niklas; Tryggvason, Ari; Peterson, John; Hubbard, Susan

    2008-04-15T23:59:59.000Z

    The structural approach to joint inversion, entailing common boundaries or gradients, offers a flexible way to invert diverse types of surface-based and/or crosshole geophysical data. The cross-gradients function has been introduced as a means to construct models in which spatial changes in two models are parallel or anti-parallel. Inversion methods that use such structural constraints also provide estimates of non-linear and non-unique field-scale relationships between model parameters. Here, we invert jointly crosshole radar and seismic traveltimes for structurally similar models using an iterative non-linear traveltime tomography algorithm. Application of the inversion scheme to synthetic data demonstrates that it better resolves lithological boundaries than the individual inversions. Tests of the scheme on observed radar and seismic data acquired within a shallow aquifer illustrate that the resultant models have improved correlations with flowmeter data than with models based on individual inversions. The highest correlation with the flowmeter data is obtained when the joint inversion is combined with a stochastic regularization operator, where the vertical integral scale is estimated from the flowmeter data. Point-spread functions shows that the most significant resolution improvements of the joint inversion is in the horizontal direction.

  4. Double-Difference Waveform Inversion of 4D Ocean Bottom Cable Data: Application to Valhall, North Sea

    E-Print Network [OSTI]

    Yang, Di

    2013-01-01T23:59:59.000Z

    Changes in reservoir properties resulting from extracting hydrocarbons and injecting fluid are critical to optimize production. These properties can be characterized using waveform inversions of time-lapse seismic data. ...

  5. Synthetic versus real time-lapse seismic data at the Sleipner CO2 injection site. R. J. Arts*, TNO-Geological Survey of the Netherlands & Delft University of Technology, R.A. Chadwick,

    E-Print Network [OSTI]

    Santos, Juan

    , each up to a few metres thick. Quantitative seismic interpretation of the time-lapse data has included km2 . Previous interpretations of the seismic data (Arts et al., 2004; Chadwick et al. 2004; 2005Synthetic versus real time-lapse seismic data at the Sleipner CO2 injection site. R. J. Arts*, TNO

  6. Joint inversion of marine seismic AVA and CSEM data using statistical rock-physics models and Markov random fields: Stochastic inversion of AVA and CSEM data

    SciTech Connect (OSTI)

    Chen, J.; Hoversten, G.M.

    2011-09-15T23:59:59.000Z

    Joint inversion of seismic AVA and CSEM data requires rock-physics relationships to link seismic attributes to electrical properties. Ideally, we can connect them through reservoir parameters (e.g., porosity and water saturation) by developing physical-based models, such as Gassmann’s equations and Archie’s law, using nearby borehole logs. This could be difficult in the exploration stage because information available is typically insufficient for choosing suitable rock-physics models and for subsequently obtaining reliable estimates of the associated parameters. The use of improper rock-physics models and the inaccuracy of the estimates of model parameters may cause misleading inversion results. Conversely, it is easy to derive statistical relationships among seismic and electrical attributes and reservoir parameters from distant borehole logs. In this study, we develop a Bayesian model to jointly invert seismic AVA and CSEM data for reservoir parameter estimation using statistical rock-physics models; the spatial dependence of geophysical and reservoir parameters are carried out by lithotypes through Markov random fields. We apply the developed model to a synthetic case, which simulates a CO{sub 2} monitoring application. We derive statistical rock-physics relations from borehole logs at one location and estimate seismic P- and S-wave velocity ratio, acoustic impedance, density, electrical resistivity, lithotypes, porosity, and water saturation at three different locations by conditioning to seismic AVA and CSEM data. Comparison of the inversion results with their corresponding true values shows that the correlation-based statistical rock-physics models provide significant information for improving the joint inversion results.

  7. Applicability of 2-D Time-Lapse High-Resolution Seismic Reflection Approach to Image Natural Salt-Dissolution and Subsidence in Central Kansas and Improved Post-Processed Vibroseis Data Characteristics

    E-Print Network [OSTI]

    Rice, Daniel

    2009-01-12T23:59:59.000Z

    The effectiveness of 2-D time-lapse imaging for monitoring natural dissolution of the Hutchinson Salt in eastern Reno County, Kansas was shown to be restricted when comparing high-resolution seismic reflection data acquired ...

  8. Application of Time-Lapse Seismic Monitoring for the Control and Optimization of CO2 Enhanced Oil Recovery Operations

    SciTech Connect (OSTI)

    Brian Toelle

    2008-11-30T23:59:59.000Z

    This project, 'Application of Time-Lapse Seismic Monitoring for the Control and Optimization of CO{sub 2} Enhanced Oil Recovery Operations', investigated the potential for monitoring CO{sub 2} floods in carbonate reservoirs through the use of standard p-wave seismic data. This primarily involved the use of 4D seismic (time lapse seismic) in an attempt to observe and map the movement of the injected CO{sub 2} through a carbonate reservoir. The differences between certain seismic attributes, such as amplitude, were used for this purpose. This technique has recently been shown to be effective in CO{sub 2} monitoring in Enhanced Oil Recovery (EOR) projects, such as Weyborne. This study was conducted in the Charlton 30/31 field in the northern Michigan Basin, which is a Silurian pinnacle reef that completed its primary production in 1997 and was scheduled for enhanced oil recovery using injected CO{sub 2}. Prior to injection an initial 'Base' 3D survey was obtained over the field and was then processed and interpreted. CO{sub 2} injection within the main portion of the reef was conducted intermittently during 13 months starting in August 2005. During this time, 29,000 tons of CO{sub 2} was injected into the Guelph formation, historically known as the Niagaran Brown formation. By September 2006, the reservoir pressure within the reef had risen to approximately 2000 lbs and oil and water production from the one producing well within the field had increased significantly. The determination of the reservoir's porosity distribution, a critical aspect of reservoir characterization and simulation, proved to be a significant portion of this project. In order to relate the differences observed between the seismic attributes seen on the multiple 3D seismic surveys and the actual location of the CO{sub 2}, a predictive reservoir simulation model was developed based on seismic attributes obtained from the base 3D seismic survey and available well data. This simulation predicted that the CO{sub 2} injected into the reef would remain in the northern portion of the field. Two new wells, the State Charlton 4-30 and the Larsen 3-31, were drilled into the field in 2006 and 2008 respectively and supported this assessment. A second (or 'Monitor') 3D seismic survey was acquired during September 2007 over most of the field and duplicated the first (Base) survey, as much as possible. However, as the simulation and new well data available at that time indicated that the CO{sub 2} was concentrated in the northern portion of the field, the second seismic survey was not acquired over the extreme southern end of the area covered by the original (or Base) 3D survey. Basic processing was performed on the second 3D seismic survey and, finally, 4D processing methods were applied to both the Base and the Monitor surveys. In addition to this 3D data, a shear wave seismic data set was obtained at the same time. Interpretation of the 4D seismic data indicated that a significant amplitude change, not attributable to differences in acquisition or processing, existed at the locations within the reef predicted by the reservoir simulation. The reservoir simulation was based on the porosity distribution obtained from seismic attributes from the Base 3D survey. Using this validated reservoir simulation the location of oil within the reef at the time the Monitor survey was obtained and recommendations made for the drilling of additional EOR wells. The economic impact of this project has been estimated in terms of both enhanced oil recovery and CO{sub 2} sequestration potential. In the northern Michigan Basin alone, the Niagaran reef play is comprised of over 700 Niagaran reefs with reservoirs already depleted by primary production. Potentially there is over 1 billion bbls of oil (original oil in place minus primary recovery) remains in the reefs in Michigan, much of which could be more efficiently mobilized utilizing techniques similar to those employed in this study.

  9. Quantitative Monitoring for Enhanced Geothermal Systems Using Double-Difference Waveform Inversion with Spatially-Variant Total-Variation Regularization

    SciTech Connect (OSTI)

    Lin, Youzuo [Los Alamos National Laboratory; Huang, Lianjie [Los Alamos National Laboratory; Zhang, Zhigang [Los Alamos National Laboratory

    2011-01-01T23:59:59.000Z

    Double-difference waveform inversion is a promising tool for quantitative monitoring for enhanced geothermal systems (EGS). The method uses time-lapse seismic data to jointly inverts for reservoir changes. Due to the ill-posedness of waveform inversion, it is a great challenge to obtain reservoir changes accurately and efficiently, particularly when using timelapse seismic reflection data. To improve reconstruction, we develop a spatially-variant total-variation regularization scheme into double-difference waveform inversion to improve the inversion accuracy and robustness. The new regularization scheme employs different regularization parameters in different regions of the model to obtain an optimal regularization in each area. We compare the results obtained using a spatially-variant parameter with those obtained using a constant regularization parameter. Utilizing a spatially-variant regularization scheme, the target monitoring regions are well reconstructed and the image noise is significantly reduced outside the monitoring regions. Our numerical examples demonstrate that the spatially-variant total-variation regularization scheme provides the flexibility to regularize local regions based on the a priori spatial information without increasing computational costs and the computer memory requirement.

  10. Structure of the Crust beneath Cameroon, West Africa, from the Joint Inversion of Rayleigh Wave Group Velocities and Receiver Functions

    SciTech Connect (OSTI)

    Tokam, A K; Tabod, C T; Nyblade, A A; Julia, J; Wiens, D A; Pasyanos, M E

    2010-02-18T23:59:59.000Z

    The Cameroon Volcanic Line (CVL) is a major geologic feature that cuts across Cameroon from the south west to the north east. It is a unique volcanic lineament which has both an oceanic and a continental sector and consists of a chain of Tertiary to Recent, generally alkaline volcanoes stretching from the Atlantic island of Pagalu to the interior of the African continent. The oceanic sector includes the islands of Bioko (formerly Fernando Po) and Sao Tome and Principe while the continental sector includes the Etinde, Cameroon, Manengouba, Bamboutos, Oku and Mandara mountains, as well as the Adamawa and Biu Plateaus. In addition to the CVL, three other major tectonic features characterize the region: the Benue Trough located northwest of the CVL, the Central African Shear Zone (CASZ), trending N70 degrees E, roughly parallel to the CVL, and the Congo Craton in southern Cameroon. The origin of the CVL is still the subject of considerable debate, with both plume and non-plume models invoked by many authors (e.g., Deruelle et al., 2007; Ngako et al, 2006; Ritsema and Allen, 2003; Burke, 2001; Ebinger and Sleep, 1998; Lee et al, 1994; Dorbath et al., 1986; Fairhead and Binks, 1991; King and Ritsema, 2000; Reusch et al., 2010). Crustal structure beneath Cameroon has been investigated previously using active (Stuart et al, 1985) and passive (Dorbath et al., 1986; Tabod, 1991; Tabod et al, 1992; Plomerova et al, 1993) source seismic data, revealing a crust about 33 km thick at the south-western end of the continental portion of the CVL (Tabod, 1991) and the Adamawa Plateau, and thinner crust (23 km thick) beneath the Garoua Rift in the north (Stuart et al, 1985) (Figure 1). Estimates of crustal thickness obtained using gravity data show similar variations between the Garoua rift, Adamawa Plateau, and southern part of the CVL (Poudjom et al., 1995; Nnange et al., 2000). In this study, we investigate further crustal structure beneath the CVL and the adjacent regions in Cameroon using 1-D shear wave velocity models obtained from the joint inversion of Rayleigh wave group velocities and P-receiver functions for 32 broadband seismic stations. From the 1-D shear wave velocity models, we obtain new insights into the composition and structure of the crust and upper mantle across Cameroon. After briefly reviewing the geological framework of Cameroon, we describe the data and the joint inversion method, and then interpret variations in crustal structure found beneath Cameroon in terms of the tectonic history of the region.

  11. Live Cells as Dynamic Laboratories: Time Lapse Raman Spectral Microscopy of Nanoparticles with Both IgE Targeting and pH-Sensing Functions

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

    Nowak-Lovato, Kristy L.; Rector, Kirk D.

    2012-01-01T23:59:59.000Z

    This review captures the use of live cells as dynamic microlaboratories through implementation of labeled nanoparticles (nanosensors) that have both sensing and targeting functions. The addition of 2,4-?-dinitrophenol-L-lysine (DNP) as a Fc?RI targeting ligand and 4-mercaptopyridine (4-MPy) as a pH-sensing ligand enables spatial and temporal monitoring of Fc?RI receptors and their pH environment within the endocytic pathway. To ensure reliability, the sensor is calibratedin vivousing the ionophore nigericin and standard buffer solutions to equilibrate the external[H+]concentration with that of the cell compartments. This review highlights the nanosensors, ability to traffic and respond to pH of receptor-bound nanosensors (1) at physiologicalmore »temperature(37°C)versus room temperature(25°C), (2) after pharmacological treatment with bafilomycin, anH+ATPase pump inhibitor, or amiloride, an inhibitor ofNa+/H+exchange, and (3) in response to both temperature and pharmacological treatment. Whole-cell, time lapse images are demonstrated to show the ability to transform live cells into dynamic laboratories to monitor temporal and spatial endosomal pH. The versatility of these probes shows promise for future applications relevant to intracellular trafficking and intelligent drug design.« less

  12. Joint Inversion of Reservoir Production Measurements and 3D Pre-Stack Seismic Data: Proof Carlos Torres-Verdn, Zhan Wu, Omar J. Varela, Mrinal K. Sen, and Indrajit G. Roy.

    E-Print Network [OSTI]

    Torres-Verdín, Carlos

    in this paper is also suitable for the quantitative interpretation of 4D seismic data. Simulation and InversionJoint Inversion of Reservoir Production Measurements and 3D Pre-Stack Seismic Data: Proof-stack seismic data and fluid production history. The production measurements and the seismic data

  13. Application of quantitative time-lapse imaging (QTLI) for evaluation of Mrp2-based drug–drug interaction induced by liver metabolites

    SciTech Connect (OSTI)

    Nakanishi, Takeo; Ikenaga, Miho; Fukuda, Hajime; Matsunaga, Norikazu; Tamai, Ikumi, E-mail: tamai@p.kanazawa-w.ac.jp

    2012-09-01T23:59:59.000Z

    We previously reported a quantitative time-lapse imaging (QTLI)-based analysis method to assess drug–drug interactions (DDI) at multidrug resistance-associated protein 2 (Mrp2) in rat sandwich-cultured hepatocyte (SCH) system, utilizing the fluorescent Mrp2 substrate, 5-(and 6)-carboxy-2?,7?-dichlorofluorescein (CDF). Here, we aimed to examine the feasibility of using QTLI to evaluate DDI involving drug metabolite(s) generated in hepatocytes. We used estradiol (E2) and bilirubin as model compounds; both are not substrates of MRP2, whereas their hepatic metabolites, estradiol-17?-glucuronide (E17G) or bilirubin glucuronides, are known to be its substrates as well as inhibitors. When rat SCHs were pre-exposed with E2, fluorescence of CDF accumulated in bile canaliculi decreased depending upon both the duration of pre-exposure and the concentration of extracellular E2. The decrease corresponded with the increase in intracellular concentration of E17G in hepatocytes. Furthermore, cytotoxicity of vinblastine, a substrate of MRP2, was enhanced in SCHs treated with E2. Similarly, CDF accumulated in bile canaliculi was significantly reduced in rat SCHs pre-exposed with bilirubin. In conclusion, these results suggest that phase II biotransformation of a competitor is reflected in alteration of MRP2-mediated CDF transport detected in QTLI. The QTLI might provide a convenient platform to evaluate transporter-based DDIs involving hepatic metabolites of drug candidates without the need to identify the metabolites. -- Highlights: ? Mrp2-mediated CDF transport is inhibited by E2, but not E17G in vesicle study. ? Both E2 and E17G do not compromise CDF formation from CDFDA in hepatocytes. ? CDF accumulation in bile canaliculi is inhibited by E2 or E17G in QTLI. ? Increasing exposure to E2 decreases CDF accumulation in bile canaliculi in QTLI. ? QTLI is feasible to assess Mrp2-based DDI involving drug metabolite in hepatocytes.

  14. Validation of the BERT Point Source Inversion Scheme Using the Joint Urban 2003 Tracer Experiment Dataset - Final Report

    SciTech Connect (OSTI)

    Brambilla, Sara [Los Alamos National Laboratory; Brown, Michael J. [Los Alamos National Laboratory

    2012-06-18T23:59:59.000Z

    A terrorist attack in a U.S. city utilizing biological weapons could have severe consequences. A biological agent could be aerosolized and emitted into the air in the middle of a city, invisibly traveling with the winds, and dosing an unknowing populace. The magnitude of the problem would only be revealed as sick people started arriving several days later at hospitals with symptoms, many already too ill to be saved. A national program has deployed a network of biological agent collectors in U.S. cities to provide early detection of a bio-weapon attack, thereby hastening medical intervention and potentially saving many thousands of lives. In fact, the most effective treatment takes place prior to infection or in its early stages and early warning might reduce the disease progression and, consequently, the possibility of an outbreak. If a biological attack were to occur in a city, one or more collectors may register hits with specific dosages and the city would be alerted that an attack had taken place. This piece of information alone, however, would not be enough to determine how serious the attack was, i.e., how much biological agent was released into the air and where the bio-plume traveled. The first responders and public health communities will want to know what regions were impacted, how many persons might get sick, which people most need medical supplies, and where to clean up. The law enforcement community will want to look for forensic evidence at the release location. The Bio-Agent Event Reconstruction Tool (BERT) has been developed in order to recreate what might have happened during an airborne biological agent attack based on biological agent collector measurements and wind collectors mounted around a city. The tool can be used to estimate possible release areas while eliminating other areas, and can estimate bounds on the amount of material released. The tool can then be used to project forward from the possible source areas to estimate potential hazard zones. Due to a unique source inversion technique - called the upwind collector footprint approach - the tool runs fast and the source regions can be determined in a few minutes. In this report, we provide an overview of the BERT framework, followed by a description of the source inversion technique. The Joint URBAN 2003 field experiment held in Oklahoma City that was used to validate BERT is then described. Subsequent sections describe the metrics used for evaluation, the comparison of the experimental data and BERT output, and under what conditions the BERT tool succeeds and performs poorly. Results are aggregated in different ways (e.g., daytime vs. nighttime releases, 1 vs. 2 vs. 3 hit collectors) to determine if BERT shows any systematic errors. Finally, recommendations are given for how to improve the code and procedures for optimizing performance in operational mode.

  15. Estimation of in-situ petrophysical properties from wireline formation tester and induction logging measurements: A joint inversion approach

    E-Print Network [OSTI]

    Torres-Verdín, Carlos

    -filtrate invasion and formation test. A fully implicit finite- difference black-oil reservoir simulator with brine phenomena in porous media can be coupled through fluid saturation equations. Thus, a multi-physics inversion

  16. Sensitivity analysis for joint inversion of ground-penetrating radar and thermal-hydrological data from a large-scale underground heater test

    E-Print Network [OSTI]

    Kowalsky, M.B.; Birkholzer, J.; Peterson, J.; Finsterle, S.; Mukhopadhya y, S.; Tsang, Y.T.

    2008-01-01T23:59:59.000Z

    first step toward comprehensive inversion of the heater testfirst step toward a full inversion of the heater test data,

  17. Assisted Seismic Matching: Joint Inversion of Seismic, Rock Physics and Basin Modeling Ulisses T. Mello*, IBM T. J. Watson Res. Center, Stewart A. Levin, Halliburton, Vanessa Lopez, Andrew Conn,

    E-Print Network [OSTI]

    Zhang, Hongchao

    Assisted Seismic Matching: Joint Inversion of Seismic, Rock Physics and Basin Modeling Ulisses T physics, and seismic attributes, including seismic amplitude to match seismic data. Introduction a match to seismic data. In particular, we seek to match not just event timing (phase) but also reflection

  18. CX-011255: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Time-lapse Joint Inversion of Geophysical Data and its Application to Geothermal Prospecting CX(s) Applied: A9, B3.1 Date: 09/30/2013 Location(s): Colorado Offices(s): Golden Field Office

  19. Time lapse HDR: time lapse photography with high dynamic range images

    E-Print Network [OSTI]

    Clark, Brian Sean

    2005-08-29T23:59:59.000Z

    ?Malley saved me countless hours with AHDRIA. Felice House lent me her Canon G3, which proved to be an excellent image capture device, and Glen Vigus somehow always found time to provide imaging hardware support. Don Lake provided inspiration for this and other... (or literal ones, either). One way HDR images can be created is synthetically, by rendering a scene from some imaging software. Radiance is one such package, and is one of the first ones to make use of the High Dynamic Range format. In fact, the native...

  20. Re-Inversion of Surface Electrical Resistivity Tomography Data from the Hanford Site B-Complex

    SciTech Connect (OSTI)

    Johnson, Timothy C.; Wellman, Dawn M.

    2013-05-01T23:59:59.000Z

    This report documents the three-dimensional (3D) inversion results of surface electrical resistivity tomography (ERT) data collected over the Hanford Site B-Complex. The data were collected in order to image the subsurface distribution of electrically conductive vadose zone contamination resulting from both planned releases of contamination into subsurface infiltration galleries (cribs, trenches, and tile fields), as well as unplanned releases from the B, BX, and BY tank farms and/or associated facilities. Electrically conductive contaminants are those which increase the ionic strength of pore fluids compared to native conditions, which comprise most types of solutes released into the subsurface B-Complex. The ERT data were collected and originally inverted as described in detail in report RPP-34690 Rev 0., 2007, which readers should refer to for a detailed description of data collection and waste disposal history. Although the ERT imaging results presented in that report successfully delineated the footprint of vadose zone contamination in areas outside of the tank farms, imaging resolution was not optimized due to the inability of available inversion codes to optimally process the massive ERT data set collected at the site. Recognizing these limitations and the potential for enhanced ERT characterization and time-lapse imaging at contaminated sites, a joint effort was initiated in 2007 by the U.S. Department of Energy – Office of Science (DOE-SC), with later support by the Office of Environmental Management (DOE-EM), and the U.S. Department of Defense (DOD), to develop a high-performance distributed memory parallel 3D ERT inversion code capable of optimally processing large ERT data sets. The culmination of this effort was the development of E4D (Johnson et al., 2010,2012) In 2012, under the Deep Vadose Zone Applied Field Research Initiative (DVZ-AFRI), the U.S. Department of Energy – Richland Operations Office (DOE-RL) and CH2M Hill Plateau Remediation Company (CHPRC) commissioned an effort for the Pacific Northwest National Laboratory (PNNL) to re-invert the ERT data collected over the B-Complex using E4D, with the objective to improve imaging resolution and better understand the distribution of vadose zone contamination at the B-Complex. The details and results of that effort as documented in this report display a significant improvement in ERT image resolution, revealing the nature and orientation of contaminant plumes originating in former infiltration galleries and extending toward the water table. In particular, large plumes originating in the BY-Cribs area appear to have intercepted, or are close to intercepting the water table after being diverted eastward, possibly by the same low permeability unit causing perched water north of the B-Tank Farm boundary. Contaminant plumes are also evident beneath the BX-Trenches, but do not appear to have intercepted the water table. Imaging results within the tank farms themselves are highly biased by the dense network of electrically conductive tanks and dry wells, and are therefore inconclusive concerning contaminant distributions beneath tanks. However, beneath the diversion boxes, the results do reveal highly conductive anomalies that are not associated with metallic infrastructure, and may be diagnostic of extensive contamination. Overall, the parallel ERT inversion provides additional detail concerning contaminated zones in terms of conductive anomalies. These anomalies are consistent with waste disposal histories, and in several cases reveal lateral contaminant transport caused by heterogeneity within the vadose zone.

  1. Three-dimensional induced polarization data inversion for complex resistivity

    SciTech Connect (OSTI)

    Commer, M.; Newman, G.A.; Williams, K.H.; Hubbard, S.S.

    2011-03-15T23:59:59.000Z

    The conductive and capacitive material properties of the subsurface can be quantified through the frequency-dependent complex resistivity. However, the routine three-dimensional (3D) interpretation of voluminous induced polarization (IP) data sets still poses a challenge due to large computational demands and solution nonuniqueness. We have developed a flexible methodology for 3D (spectral) IP data inversion. Our inversion algorithm is adapted from a frequency-domain electromagnetic (EM) inversion method primarily developed for large-scale hydrocarbon and geothermal energy exploration purposes. The method has proven to be efficient by implementing the nonlinear conjugate gradient method with hierarchical parallelism and by using an optimal finite-difference forward modeling mesh design scheme. The method allows for a large range of survey scales, providing a tool for both exploration and environmental applications. We experimented with an image focusing technique to improve the poor depth resolution of surface data sets with small survey spreads. The algorithm's underlying forward modeling operator properly accounts for EM coupling effects; thus, traditionally used EM coupling correction procedures are not needed. The methodology was applied to both synthetic and field data. We tested the benefit of directly inverting EM coupling contaminated data using a synthetic large-scale exploration data set. Afterward, we further tested the monitoring capability of our method by inverting time-lapse data from an environmental remediation experiment near Rifle, Colorado. Similar trends observed in both our solution and another 2D inversion were in accordance with previous findings about the IP effects due to subsurface microbial activity.

  2. Time-lapse construction of new Theory & Computing Sciences building

    SciTech Connect (OSTI)

    2009-10-02T23:59:59.000Z

    Movie constructed from images captured every day at noon from June 2008-September 2009. The camera was repositioned once during the capture period, to better capture the whole building site.

  3. Optimal experiment design for time-lapse traveltime tomography

    SciTech Connect (OSTI)

    Ajo-Franklin, J.B.

    2009-10-01T23:59:59.000Z

    Geophysical monitoring techniques offer the only noninvasive approach capable of assessing both the spatial and temporal dynamics of subsurface fluid processes. Increasingly, permanent sensor arrays in boreholes and on the ocean floor are being deployed to improve the repeatability and increase the temporal sampling of monitoring surveys. Because permanent arrays require a large up-front capital investment and are difficult (or impossible) to re-configure once installed, a premium is placed on selecting a geometry capable of imaging the desired target at minimum cost. We present a simple approach to optimizing downhole sensor configurations for monitoring experiments making use of differential seismic traveltimes. In our case, we use a design quality metric based on the accuracy of tomographic reconstructions for a suite of imaging targets. By not requiring an explicit singular value decomposition of the forward operator, evaluation of this objective function scales to problems with a large number of unknowns. We also restrict the design problem by recasting the array geometry into a low dimensional form more suitable for optimization at a reasonable computational cost. We test two search algorithms on the design problem: the Nelder-Mead downhill simplex method and the Multilevel Coordinate Search algorithm. The algorithm is tested for four crosswell acquisition scenarios relevant to continuous seismic monitoring, a two parameter array optimization, several scenarios involving four parameter length/offset optimizations, and a comparison of optimal multi-source designs. In the last case, we also examine trade-offs between source sparsity and the quality of tomographic reconstructions. One general observation is that asymmetric array lengths improve localized image quality in crosswell experiments with a small number of sources and a large number of receivers. Preliminary results also suggest that high-quality differential images can be generated using only a small number of optimally positioned sources.

  4. NUMERICAL MODELING OF FLUID FLOW AND TIME-LAPSE ...

    E-Print Network [OSTI]

    gabriela

    Abstract. CO2 sequestration in the underground is a valid alternative approach for mitigat- ing the greenhouse effect. Nevertheless, very little is known about the

  5. Numerical modeling of fluid flow and time-lapse seismograms ...

    E-Print Network [OSTI]

    gabriela

    (greenhouse effect). • To minimize climate change impacts, geological sequestration of CO2 is an immediate option. • Geologic sequestration involves injecting ...

  6. OMEGA EP Building Construction Time Lapse Movie Gallery - Laboratory for

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItemResearch > TheNuclear Astrophysics One of the greatNuclearNuclearBeamlines -Laser

  7. CX-007889: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Time-lapse Joint Inversion of Geophysical Data and its Application to Geothermal Prospecting GEODE CX(s) Applied: A9, B3.1, B3.6, B3.11 Date: 02/10/2012 Location(s): Colorado Offices(s): Golden Field Office

  8. CX-007391: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Time-lapse Joint Inversion of Geophysical Data and its Application to Geothermal Prospecting GEODE CX(s) Applied: A9, B3.1, B3.6 Date: 12/21/2011 Location(s): Colorado Offices(s): Golden Field Office

  9. Geophysical InversionFacility

    E-Print Network [OSTI]

    Oldenburg, Douglas W.

    UBC Geophysical InversionFacility Modelling and Inversion of EMI data collected over magnetic soils of EMI data acquired at sites with magnetic soils · Geophysical Proveouts · Geonics EM63 Data · First model parameters: · Location · Orientation · Polarizabilities 4 #12;UBC Geophysical Inversion Facility

  10. Butt Joint Tool Commissioning

    SciTech Connect (OSTI)

    Martovetsky, N N

    2007-12-06T23:59:59.000Z

    ITER Central Solenoid uses butt joints for connecting the pancakes in the CS module. The principles of the butt joining of the CICC were developed by the JAPT during CSMC project. The difference between the CSMC butt joint and the CS butt joint is that the CS butt joint is an in-line joint, while the CSMC is a double joint through a hairpin jumper. The CS butt joint has to carry the hoop load. The straight length of the joint is only 320 mm, and the vacuum chamber around the joint has to have a split in the clamp shell. These requirements are challenging. Fig.1 presents a CSMC joint, and Fig.2 shows a CS butt joint. The butt joint procedure was verified and demonstrated. The tool is capable of achieving all specified parameters. The vacuum in the end was a little higher than the target, which is not critical and readily correctable. We consider, tentatively that the procedure is established. Unexpectedly, we discover significant temperature nonuniformity in the joint cross section, which is not formally a violation of the specs, but is a point of concern. All testing parameters are recorded for QA purposes. We plan to modify the butt joining tool to improve its convenience of operation and provide all features necessary for production of butt joints by qualified personnel.

  11. Stochastic Joint Inversion for Integrated Data Interpretation in Geothermal

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOriginEducationVideo »UsageSecretaryVideosSpringoutAPBF-DEC4: ProjectStephen M.P.Stewards

  12. Risk Management Institute Joint Seminar Joint Seminar -

    E-Print Network [OSTI]

    Chaudhuri, Sanjay

    Risk Management Institute Joint Seminar Joint Seminar - Risk Management Institute And Department A (S14, #03-10) Speaker Prof. Wang Hefei University of Illinois, Chicago Title Leverage Management Abstract Leverage has often aggravated losses to managed investments. The recent collapses of hedge funds

  13. 2014 Joint Action Workshop

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Joint Action Workshop is an annual event for joint action agencies and their members to meet informally and discuss emerging policy, regulatory, and power supply issues, and other topics...

  14. Imaging, Characterizing, and Modeling of Fracture Networks and...

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

    novel imaging methods for monitoring EGS reservoirs. - Innovation: Use time-lapse seismic data and elastic-waveform inversion for high-resolution reservoir imaging; Improve...

  15. Fluid Imaging of Enhanced Geothermal Systems

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

    for Fluids & Fractures - time lapse MTCSEM for fluid imaging - joint CSEM-MTseismic imaging ??? - use MEQ focal information with EM Imaging ScientificTechnical Approach...

  16. Pointwise Fourier Inversion: a Wave Equation Approach

    E-Print Network [OSTI]

    Pointwise Fourier Inversion: a Wave Equation Approach Mark A. Pinsky1 Michael E. Taylor2. A general criterion for pointwise Fourier inversion 2. Pointwise Fourier inversion on Rn (n = 3) 3. Fourier inversion on R2 4. Fourier inversion on Rn (general n) 5. Fourier inversion on spheres 6. Fourier inversion

  17. INVERSE PROTEIN FOLDING, HIERARCHICAL OPTIMISATION

    E-Print Network [OSTI]

    Halligan, Daniel

    INVERSE PROTEIN FOLDING, HIERARCHICAL OPTIMISATION AND TIE KNOTS Thomas M. A. Fink st. john Introduction 3 1.1 Inverse Protein Folding 3 1.2 Hierarchical Optimisation 5 1.3 Tie Knots 6 1.4 Schematic Organisation 6 1.5 Publications 9 2 Protein Folding, Inverse Protein Folding and Energy Landscapes 10 2

  18. 7, 1043910465, 2007 Mesoscale inversion

    E-Print Network [OSTI]

    Boyer, Edmond

    ACPD 7, 10439­10465, 2007 Mesoscale inversion T. Lauvaux et al. Title Page Abstract Introduction Discussions Mesoscale inversion: first results from the CERES campaign with synthetic data T. Lauvaux 1,2 , M.lauvaux@lsce.ipsl.fr) 10439 #12;ACPD 7, 10439­10465, 2007 Mesoscale inversion T. Lauvaux et al. Title Page Abstract

  19. Robust inversion, dimensionality reduction, and randomized sampling

    E-Print Network [OSTI]

    Aleksandr Aravkin

    2011-11-17T23:59:59.000Z

    Nov 17, 2011 ... Keywords: inverse problems, seismic inversion, stochastic optimization, robust estimation. Category 1: Nonlinear Optimization. Category 2: ...

  20. Pointwise Fourier Inversion: a Wave Equation Approach

    E-Print Network [OSTI]

    Pointwise Fourier Inversion: a Wave Equation Approach Mark A. Pinsky 1 Michael E. Taylor 2. A general criterion for pointwise Fourier inversion 2. Pointwise Fourier inversion on R n (n = 3) 3. Fourier inversion on R 2 4. Fourier inversion on R n (general n) 5. Fourier inversion on spheres 6. Fourier

  1. High pressure ceramic joint

    DOE Patents [OSTI]

    Ward, Michael E. (Poway, CA); Harkins, Bruce D. (San Diego, CA)

    1993-01-01T23:59:59.000Z

    Many recuperators have components which react to corrosive gases and are used in applications where the donor fluid includes highly corrosive gases. These recuperators have suffered reduced life, increased service or maintenance, and resulted in increased cost. The present joint when used with recuperators increases the use of ceramic components which do not react to highly corrosive gases. Thus, the present joint used with the present recuperator increases the life, reduces the service and maintenance, and reduces the increased cost associated with corrosive action of components used to manufacture recuperators. The present joint is comprised of a first ceramic member, a second ceramic member, a mechanical locking device having a groove defined in one of the first ceramic member and the second ceramic member. The joint and the mechanical locking device is further comprised of a refractory material disposed in the groove and contacting the first ceramic member and the second ceramic member. The present joint mechanically provides a high strength load bearing joint having good thermal cycling characteristics, good resistance to a corrosive environment and good steady state strength at elevated temperatures.

  2. High pressure ceramic joint

    DOE Patents [OSTI]

    Ward, M.E.; Harkins, B.D.

    1993-11-30T23:59:59.000Z

    Many recuperators have components which react to corrosive gases and are used in applications where the donor fluid includes highly corrosive gases. These recuperators have suffered reduced life, increased service or maintenance, and resulted in increased cost. The present joint when used with recuperators increases the use of ceramic components which do not react to highly corrosive gases. Thus, the present joint used with the present recuperator increases the life, reduces the service and maintenance, and reduces the increased cost associated with corrosive action of components used to manufacture recuperators. The present joint is comprised of a first ceramic member, a second ceramic member, a mechanical locking device having a groove defined in one of the first ceramic member and the second ceramic member. The joint and the mechanical locking device is further comprised of a refractory material disposed in the groove and contacting the first ceramic member and the second ceramic member. The present joint mechanically provides a high strength load bearing joint having good thermal cycling characteristics, good resistance to a corrosive environment and good steady state strength at elevated temperatures. 4 figures.

  3. Center for Inverse Design

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMForms About Batteriesmetal-organic frameworks EFRC 1001 wordInverse

  4. The feasibility of reservoir monitoring using time-lapse marine CSEM Arnold Orange1

    E-Print Network [OSTI]

    Key, Kerry

    . Since then, the concept has been embraced with enthusiasm by the exploration in- dustry, mainly. Although addressing these factors may be challenging using current exploration CSEM practices several years ago in a test by Statoil over the Girassol prospect, offshore Angola Ellingsrud et al., 2002

  5. Time-lapse gravity monitoring of an aquifer storage recovery project in Leyden, Colorado Kristofer Davis*

    E-Print Network [OSTI]

    this stage, water injection will also help in removal of residual natural gas stored in the mine. The mine coal mine is being developed into an underground water reservoir in Leyden, Colorado. Excess water from. Efficient operation of the storage-recovery process requires knowledge of water concentration and movement

  6. Coda-wave interferometry analysis of time-lapse VSP data for monitoring geological carbon sequestration

    E-Print Network [OSTI]

    Zhou, R.

    2010-01-01T23:59:59.000Z

    Monitoring Geological Carbon Sequestration Authors: RongmaoGeological Carbon Sequestration ABSTRACT Injection andmonitoring geological carbon sequestration. ACKNOWLEDGEMENTS

  7. Fast history matching of time-lapse seismic and production data for high resolution models

    E-Print Network [OSTI]

    Jimenez, Eduardo Antonio

    2008-10-10T23:59:59.000Z

    ..............................................................33 2.20 Discretization elements in finite-differences and streamline simulation..........34 2.21 Faulted grid with permeability contrast along non-neighbor connections. A finite LBL construction is provided to examine the underlying flow field... water cut match for synthetic model.....................................................61 3.6 Flow domain decoupling provided by streamline-based sensitivities ..............62 3.7 Water cut performance before and after generalized travel time...

  8. Synthetic versus real time-lapse seismic data at the Sleipner CO2 ...

    E-Print Network [OSTI]

    artsrj

    2007-04-10T23:59:59.000Z

    Survey of Denmark), IFP (Institute Francais du Petrole),. TNO (Netherlands Institute of Applied Geoscience –. National Geological Survey), Schlumberger and ...

  9. Sensitivity of time lapse seismic data to the compliance of hydraulic fractures

    E-Print Network [OSTI]

    Fang, Xinding

    2013-01-01T23:59:59.000Z

    We study the sensitivity of seismic waves to changes in the fracture normal and tangential compliances by analyzing the fracture sensitivity wave equation, which is derived by differentiating the elastic wave equation with ...

  10. Numerical modeling of fluid flow and time-lapse seismics to monitor ...

    E-Print Network [OSTI]

    santos

    May 30, 2014 ... including the presence of shale seals and fractures and fractal variations of the ... In the Black-Oil model employed, brine is NOT present, OIL is.

  11. A state-space Bayesian framework for estimating biogeochemical transformations using time-lapse geophysical data

    E-Print Network [OSTI]

    Chen, J.

    2009-01-01T23:59:59.000Z

    2005), Developments in bioremediation of soils and sediments2. Field research on bioremediation of metals andassociated with Cr(VI) bioremediation, Environmental

  12. Fast History Matching of Time-Lapse Seismic and Production-Data for High Resolution Models

    E-Print Network [OSTI]

    Rey Amaya, Alvaro

    2012-10-19T23:59:59.000Z

    for the calibration of geologic spatial variability which ultimately contributes to the improvement of reservoir development and management strategies. Among the limited variety of techniques for the integration of dynamic seismic data into reservoir models...

  13. DOE 1.5 Installation Time Lapse Video (Text Version) | Department...

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

    cranes work together to lift the first tubular steel section to the turbine's tower into place. Men, which, in this video, appear to be the size of ants next to the tower...

  14. Coupling: Impact and Implications for High-Resolution Time-Lapse Seismic Surveying

    E-Print Network [OSTI]

    Walters, Shelby Lynn

    2008-07-28T23:59:59.000Z

    conditions with repeat shots has a different effect on surface waves and compressional waves. This observation has potential application to wavefield separation. Acquisition approaches typically used to optimize 2D or 3D high-resolution seismic surveys may...

  15. Feasibility of monitoring gas hydrate production with time-lapse VSP

    E-Print Network [OSTI]

    Kowalsky, M.B.

    2010-01-01T23:59:59.000Z

    density of the aqueous, gas, and hydrate phases, which isfunction of the aqueous, gas and hydrate phase saturations;in Marine Sediments with Gas Hydrates: Effective Medium

  16. OMEGA EP Laser Integration Time Lapse Movie Gallery - Laboratory for Laser

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItemResearch > TheNuclear Astrophysics One of theDedication Movie - Laboratory

  17. Inverse problem for Bremsstrahlung radiation

    SciTech Connect (OSTI)

    Voss, K.E.; Fisch, N.J.

    1991-10-01T23:59:59.000Z

    For certain predominantly one-dimensional distribution functions, an analytic inversion has been found which yields the velocity distribution of superthermal electrons given their Bremsstrahlung radiation. 5 refs.

  18. Inverse Problems in Transport Theory

    E-Print Network [OSTI]

    The inverse scattering problem for (2.1) is the following: Does S determine ...... J. Voigt, Spectral properties of the neutron transport equation, J. Math. Anal. Appl.

  19. Rolling contact orthopaedic joint design

    E-Print Network [OSTI]

    Slocum, Alexander Henry, Jr

    2013-01-01T23:59:59.000Z

    Arthroplasty, the practice of rebuilding diseased biological joints using engineering materials, is often used to treat severe arthritis of the knee and hip. Prosthetic joints have been created in a "biomimetic" manner to ...

  20. SPIDERS Joint Capability Technology Demonstration Industry Day...

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

    SPIDERS Joint Capability Technology Demonstration Industry Day Presentations SPIDERS Joint Capability Technology Demonstration Industry Day Presentations Presentations from the...

  1. Laboratory characterization of rock joints

    SciTech Connect (OSTI)

    Hsiung, S.M.; Kana, D.D.; Ahola, M.P.; Chowdhury, A.H.; Ghosh, A. [Southwest Research Inst., San Antonio, TX (United States). Center for Nuclear Waste Regulatory Analyses

    1994-05-01T23:59:59.000Z

    A laboratory characterization of the Apache Leap tuff joints under cyclic pseudostatic and dynamic loads has been undertaken to obtain a better understanding of dynamic joint shear behavior and to generate a complete data set that can be used for validation of existing rock-joint models. Study has indicated that available methods for determining joint roughness coefficient (JRC) significantly underestimate the roughness coefficient of the Apache Leap tuff joints, that will lead to an underestimation of the joint shear strength. The results of the direct shear tests have indicated that both under cyclic pseudostatic and dynamic loadings the joint resistance upon reverse shearing is smaller than that of forward shearing and the joint dilation resulting from forward shearing recovers during reverse shearing. Within the range of variation of shearing velocity used in these tests, the shearing velocity effect on rock-joint behavior seems to be minor, and no noticeable effect on the peak joint shear strength and the joint shear strength for the reverse shearing is observed.

  2. Joint Facilities User Forum

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron beamJoin HERO Mariners vs.Joint Environmental User

  3. Metal to ceramic sealed joint

    DOE Patents [OSTI]

    Lasecki, John V. (Livonia, MI); Novak, Robert F. (Farmington Hills, MI); McBride, James R. (Ypsilanti, MI)

    1991-01-01T23:59:59.000Z

    A metal to ceramic sealed joint which can withstand wide variations in temperature and maintain a good seal is provided for use in a device adapted to withstand thermal cycling from about 20 to about 1000 degrees C. The sealed joint includes a metal member, a ceramic member having an end portion, and an active metal braze forming a joint to seal the metal member to the ceramic member. The joint is positioned remote from the end portion of the ceramic member to avoid stresses at the ends or edges of the ceramic member. The sealed joint is particularly suited for use to form sealed metal to ceramic joints in a thermoelectric generator such as a sodium heat engine where a solid ceramic electrolyte is joined to metal parts in the system.

  4. Metal to ceramic sealed joint

    DOE Patents [OSTI]

    Lasecki, J.V.; Novak, R.F.; McBride, J.R.

    1991-08-27T23:59:59.000Z

    A metal to ceramic sealed joint which can withstand wide variations in temperature and maintain a good seal is provided for use in a device adapted to withstand thermal cycling from about 20 to about 1000 degrees C. The sealed joint includes a metal member, a ceramic member having an end portion, and an active metal braze forming a joint to seal the metal member to the ceramic member. The joint is positioned remote from the end portion of the ceramic member to avoid stresses at the ends or edges of the ceramic member. The sealed joint is particularly suited for use to form sealed metal to ceramic joints in a thermoelectric generator such as a sodium heat engine where a solid ceramic electrolyte is joined to metal parts in the system. 11 figures.

  5. Joint Center for Artificial Photosynthesis

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

    The Joint Center for Artificial Photosynthesis (JCAP) is the nation's largest research program dedicated to the development of an artificial solar-fuel generation technology....

  6. Biofluid lubrication for artificial joints 

    E-Print Network [OSTI]

    Pendelton, Alice Mae

    2009-05-15T23:59:59.000Z

    This research investigated biofluid lubrication related to artificial joints using tribological and rheological approaches. Biofluids studied here represent two categories of fluids, base fluids and nanostructured biofluids. ...

  7. JOINT ELECTRICAL & COMPUTER ENGINEERING AND

    E-Print Network [OSTI]

    JOINT ELECTRICAL & COMPUTER ENGINEERING AND APPLIED MATH SEMINAR "Imaging Science Meets Compressed, and electrical engineering. It surprisingly predicts that high-dimensional signals, which allow a sparse

  8. Joint Center for Artificial Photosynthesis

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

    JCAP North JCAP Headquarters Joint Center for Artificial Photosynthesis California Institute of Technology Jorgensen Laboratory, Mail Code 132-80 1200 East California Boulevard...

  9. Jointly Sponsored Research Program

    SciTech Connect (OSTI)

    Everett A. Sondreal; John G. Hendrikson; Thomas A. Erickson

    2009-03-31T23:59:59.000Z

    U.S. Department of Energy (DOE) Cooperative Agreement DE-FC26-98FT40321 funded through the Office of Fossil Energy and administered at the National Energy Technology Laboratory (NETL) supported the performance of a Jointly Sponsored Research Program (JSRP) at the Energy & Environmental Research Center (EERC) with a minimum 50% nonfederal cost share to assist industry in commercializing and effectively applying highly efficient, nonpolluting energy systems that meet the nation's requirements for clean fuels, chemicals, and electricity in the 21st century. The EERC in partnership with its nonfederal partners jointly performed 131 JSRP projects for which the total DOE cost share was $22,716,634 (38%) and the nonfederal share was $36,776,573 (62%). Summaries of these projects are presented in this report for six program areas: (1) resource characterization and waste management, (2) air quality assessment and control, (3) advanced power systems, (4) advanced fuel forms, (5) value-added coproducts, and (6) advanced materials. The work performed under this agreement addressed DOE goals for reductions in CO{sub 2} emissions through efficiency, capture, and sequestration; near-zero emissions from highly efficient coal-fired power plants; environmental control capabilities for SO{sub 2}, NO{sub x}, fine respirable particulate (PM{sub 2.5}), and mercury; alternative transportation fuels including liquid synfuels and hydrogen; and synergistic integration of fossil and renewable resources.

  10. Inversion of the star transform

    E-Print Network [OSTI]

    Fan Zhao; John C. Schotland; Vadim A. Markel

    2014-05-06T23:59:59.000Z

    We define the star transform as a generalization of the broken ray transform introduced by us in previous work. The advantages of using the star transform include the possibility to reconstruct the absorption and the scattering coefficients of the medium separately and simultaneously (from the same data) and the possibility to utilize scattered radiation which, in the case of the conventional X-ray tomography, is discarded. In this paper, we derive the star transform from physical principles, discuss its mathematical properties and analyze numerical stability of inversion. In particular, it is shown that stable inversion of the star transform can be obtained only for configurations involving odd number of rays. Several computationally-efficient inversion algorithms are derived and tested numerically.

  11. Improved characterization through joint hydrogeophysicalinversion: Examples of three different approaches

    SciTech Connect (OSTI)

    Linde, Niklas; Chen, Jinsong; Kowalsky, Michael; Finsterle,Stefan; Rubin, Yoram; Hubbard, Susan

    2004-07-01T23:59:59.000Z

    With the increasing application of geophysical methods to hydrogeological problems, approaches for obtaining quantitative estimates of hydrogeological parameters using geophysical data are in great demand. A common approach to hydrogeological parameter estimation using geophysical and hydrogeological data is to first invert the geophysical data using a geophysical inversion procedure, and subsequently use the resulting estimates together with available hydrogeological information to estimate a hydrogeological parameter field. This approach does not allow us to constrain the geophysical inversion by hydrogeological data and prior information, and thus decreases our ability to make valid estimates of the hydrogeological parameter field. Furthermore, it is difficult to quantify the uncertainty in the corresponding estimates and to validate the assumptions made. They are developing alternative approaches that allow for the joint inversion of all available hydrological and geophysical data. In this presentation, they consider three studies and draw various conclusions, such as on the potential benefits of estimating the petrophysical relationships within the inversion framework and of constraining the geophysical estimates on geophysical, as well as hydrogeological data.

  12. Joint Information CenterJoint Information Center Deepwater Horizon Response

    E-Print Network [OSTI]

    when they see the birds that have been impacted by the Deepwa- ter Horizon/BP oil spill. While and it is determined to be within the Deepwater Horizon Oil Spill Re- sponse area, a wildlife response team is notifiedJoint Information CenterJoint Information Center Deepwater Horizon Response Incident Command Post

  13. Fractional Inversion in Krylov Space

    E-Print Network [OSTI]

    B. Bunk

    1998-05-28T23:59:59.000Z

    The fractional inverse $M^{-\\gamma}$ (real $\\gamma >0$) of a matrix $M$ is expanded in a series of Gegenbauer polynomials. If the spectrum of $M$ is confined to an ellipse not including the origin, convergence is exponential, with the same rate as for Chebyshev inversion. The approximants can be improved recursively and lead to an iterative solver for $M^\\gamma x = b$ in Krylov space. In case of $\\gamma = 1/2$, the expansion is in terms of Legendre polynomials, and rigorous bounds for the truncation error are derived.

  14. Foreign Fishery Developments Japanese Joint

    E-Print Network [OSTI]

    -215. In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nationsForeign Fishery Developments Japanese Joint Fishing Ventures Stabilize Activity Trawling Skipjack tuna harvest Whaling Other harvests Aquaculture Refrigeration operations Fish processing Average $1

  15. Joint Seminar Risk Management Institute &

    E-Print Network [OSTI]

    Chaudhuri, Sanjay

    Joint Seminar Risk Management Institute & Department of Decision Sciences Details of Seminar Date and statistics is leading to a greatly broadened theory of regression which draws on tools of convex analysis with factor analysis in finance and economics. Risk Management Institute Joint Seminar #12;

  16. Method of forming a joint

    DOE Patents [OSTI]

    Butt, Darryl Paul; Cutler, Raymond Ashton; Rynders, Steven Walton; Carolan, Michael Francis

    2006-08-22T23:59:59.000Z

    A method of joining at least two sintered bodies to form a composite structure, including providing a first multicomponent metallic oxide having a perovskitic or fluorite crystal structure; providing a second sintered body including a second multicomponent metallic oxide having a crystal structure of the same type as the first; and providing at an interface a joint material containing at least one metal oxide containing at least one metal identically contained in at least one of the first and second multicomponent metallic oxides. The joint material is free of cations of Si, Ge, Sn, Pb, P and Te and has a melting point below the sintering temperatures of both sintered bodies. The joint material is heated to a temperature above the melting point of the metal oxide(s) and below the sintering temperatures of the sintered bodies to form the joint. Structures containing such joints are also disclosed.

  17. Joint Capability Technology Demonstration (JCTD) Industry Day...

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

    Joint Capability Technology Demonstration (JCTD) Industry Day Agenda Joint Capability Technology Demonstration (JCTD) Industry Day Agenda Agenda outlines the activities of the 2014...

  18. An Evaluation of the Carbon Sequestration Potential of the Cambro-Ordovician Strata of the Illinois and Michigan Basins: Part 1: Evaluation of Phase 2 CO{sub 2} Injection Testing in the Deep Saline Gunter Sandstone Reservoir (Cambro-Ordovician Knox Group), Marvin Blan No. 1 Hancock County, Kentucky Part 2: Time-lapse Three-Dimensional Vertical Seismic Profile (3D-VSP) of Sequestration Target Interval with Injected Fluids

    SciTech Connect (OSTI)

    Richard Bowersox; John Hickman; Hannes Leetaru

    2012-12-01T23:59:59.000Z

    Part 1 of this report focuses on results of the western Kentucky carbon storage test, and provides a basis for evaluating injection and storage of supercritical CO{sub 2} in Cambro-Ordovician carbonate reservoirs throughout the U.S. Midcontinent. This test demonstrated that the Cambro- Ordovician Knox Group, including the Beekmantown Dolomite, Gunter Sandstone, and Copper Ridge Dolomite in stratigraphic succession from shallowest to deepest, had reservoir properties suitable for supercritical CO{sub 2} storage in a deep saline reservoir hosted in carbonate rocks, and that strata with properties sufficient for long-term confinement of supercritical CO{sub 2} were present in the deep subsurface. Injection testing with brine and CO{sub 2} was completed in two phases. The first phase, a joint project by the Kentucky Geological Survey and the Western Kentucky Carbon Storage Foundation, drilled the Marvin Blan No. 1 carbon storage research well and tested the entire Knox Group section in the open borehole � including the Beekmantown Dolomite, Gunter Sandstone, and Copper Ridge Dolomite � at 1152�2255 m, below casing cemented at 1116 m. During Phase 1 injection testing, most of the 297 tonnes of supercritical CO{sub 2} was displaced into porous and permeable sections of the lowermost Beekmantown below 1463 m and Gunter. The wellbore was then temporarily abandoned with a retrievable bridge plug in casing at 1105 m and two downhole pressure-temperature monitoring gauges below the bridge plug pending subsequent testing. Pressure and temperature data were recorded every minute for slightly more than a year, providing a unique record of subsurface reservoir conditions in the Knox. In contrast, Phase 2 testing, this study, tested a mechanically-isolated dolomitic-sandstone interval in the Gunter. Operations in the Phase 2 testing program commenced with retrieval of the bridge plug and long-term pressure gauges, followed by mechanical isolation of the Gunter by plugging the wellbore with cement below the injection zone at 1605.7 m, then cementing a section of a 14-cm casing at 1470.4�1535.6. The resultant 70.1-m test interval at 1535.6�1605.7 m included nearly all of the Gunter sandstone facies. During the Phase 2 injection, 333 tonnes of CO{sub 2} were injected into the thick, lower sand section in the sandy member of the Gunter. Following the completion of testing, the injection zone below casing at 1116 m in the Marvin Blan No. 1 well, and wellbore below 305 m was permanently abandoned with cement plugs and the wellsite reclaimed. The range of most-likely storage capacities found in the Knox in the Marvin Blan No. 1 is 1000 tonnes per surface hectare in the Phase 2 Gunter interval to 8685 tonnes per surface hectare if the entire Knox section were available including the fractured interval near the base of the Copper Ridge. By itself the Gunter lacks sufficient reservoir volume to be considered for CO{sub 2} storage, although it may provide up to 18% of the reservoir volume available in the Knox. Regional extrapolation of CO{sub 2} storage potential based on the results of a single well test can be problematic, although indirect evidence of porosity and permeability can be demonstrated in the form of active saltwater-disposal wells injecting into the Knox. The western Kentucky region suitable for CO{sub 2} storage in the Knox is limited updip, to the east and south, by the depth at which the base of the Maquoketa shale lies above the depth required to ensure storage of CO{sub 2} in its supercritical state and the deepest a commercial well might be drilled for CO{sub 2} storage. The resulting prospective region has an area of approximately 15,600 km{sup 2}, beyond which it is unlikely that suitable Knox reservoirs may be developed. Faults in the subsurface, which serve as conduits for CO{sub 2} migration and compromise sealing strata, may mitigate the area with Knox reservoirs suitable for CO{sub 2} storage. The results of the injection tes

  19. Joint probabilities and quantum cognition

    SciTech Connect (OSTI)

    Acacio de Barros, J. [Liberal Studies, 1600 Holloway Ave., San Francisco State University, San Francisco, CA 94132 (United States)

    2012-12-18T23:59:59.000Z

    In this paper we discuss the existence of joint probability distributions for quantumlike response computations in the brain. We do so by focusing on a contextual neural-oscillator model shown to reproduce the main features of behavioral stimulus-response theory. We then exhibit a simple example of contextual random variables not having a joint probability distribution, and describe how such variables can be obtained from neural oscillators, but not from a quantum observable algebra.

  20. Inverse Temperature-Dependent Pathway of Cellulose Decrystallization...

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

    Inverse Temperature-Dependent Pathway of Cellulose Decrystallization in Trifluoroacetic Acid. Inverse Temperature-Dependent Pathway of Cellulose Decrystallization in...

  1. Bayes Nets Representation: joint distribution and conditional

    E-Print Network [OSTI]

    Mitchell, Tom

    Bayes Nets Representation: joint distribution and conditional independence Yi Zhang 10-701, Machine joint distribution of BNs Infer C. I. from factored joint distributions D-separation (motivation) 2 structure All about the joint distribution of variables ! Conditional independence assumptions are useful

  2. Center for Inverse Design: About the Center for Inverse Design

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMForms About Batteriesmetal-organic frameworks EFRC 1001 wordInverse

  3. A feasibility study for experimentally determining dynamic force distribution in a lap joint.

    SciTech Connect (OSTI)

    Mayes, Randall Lee

    2013-11-01T23:59:59.000Z

    Developing constitutive models of the physics in mechanical joints is currently stymied by inability to measure forces and displacements within the joint. The current state of the art estimates whole joint stiffness and energy loss per cycle from external measured force input and one or two acceleration responses. To validate constitutive models beyond this state requires a measurement of the distributed forces and displacements at the joint interface. Unfortunately, introducing measurement devices at the interface completely disrupts the desired physics. A feasibility study is presented for a non-intrusive method of solving for the interface dynamic forces from an inverse problem using full field measured responses. The responses come from the viewable surface of a beam. The noise levels associated with digital image correlation and continuous scanning laser Doppler velocimetry are evaluated from typical beam experiments. Two inverse problems are simulated. One utilizes the extended Sum of Weighted Accelerations Technique (SWAT). The second is a new approach dubbed the method of truncated orthogonal forces. These methods are much more robust if the contact patch geometry is well identified. Various approaches to identifying the contact patch are investigated, including ion marker tracking, Prussian blue and ultrasonic measurements. A typical experiment is conceived for a beam which has a lap joint at one end with a single bolt connecting it to another identical beam. In a virtual test using the beam finite element analysis, it appears that the SWAT inverse method requires evaluation of too many coefficients to adequately identify the force distribution to be viable. However, the method of truncated orthogonal forces appears viable with current digital image correlation (and probably other) imaging techniques.

  4. A study of generalized inverses

    E-Print Network [OSTI]

    McKinney, Nancy Lee

    1973-01-01T23:59:59.000Z

    APPENDIX A A FORTRAN IV COMPUTER PROGRAM FOR CALCULATING THE GENERALIZED INVERSE OF A MATRIX. VITA PAGE 17 17 23 32 35 38 38 46 53 53 53 59 65 68 71 92 LIST OF FIGURES FIGURE 1 Least-Square Solution. . 2 Specific Least... are as follows. We extend the definition of a diagonaL matrix to all mxn matrices. We call an mxn matrix D a diagonal matrix of d. = 0 ij for i P j, i = l, . . . , m and j = l, . . . , n. Thus the only entries in D that may be nonzero are the d, i = I...

  5. High dimensional linear inverse modelling

    E-Print Network [OSTI]

    Cooper, Fenwick C

    2015-01-01T23:59:59.000Z

    We introduce and demonstrate two linear inverse modelling methods for systems of stochastic ODE's with accuracy that is independent of the dimensionality (number of elements) of the state vector representing the system in question. Truncation of the state space is not required. Instead we rely on the principle that perturbations decay with distance or the fact that for many systems, the state of each data point is only determined at an instant by itself and its neighbours. We further show that all necessary calculations, as well as numerical integration of the resulting linear stochastic system, require computational time and memory proportional to the dimensionality of the state vector.

  6. Bayesian reconstruction of the cosmological large-scale structure: methodology, inverse algorithms and numerical optimization

    E-Print Network [OSTI]

    F. S. Kitaura; T. A. Ensslin

    2009-11-06T23:59:59.000Z

    We address the inverse problem of cosmic large-scale structure reconstruction from a Bayesian perspective. For a linear data model, a number of known and novel reconstruction schemes, which differ in terms of the underlying signal prior, data likelihood, and numerical inverse extra-regularization schemes are derived and classified. The Bayesian methodology presented in this paper tries to unify and extend the following methods: Wiener-filtering, Tikhonov regularization, Ridge regression, Maximum Entropy, and inverse regularization techniques. The inverse techniques considered here are the asymptotic regularization, the Jacobi, Steepest Descent, Newton-Raphson, Landweber-Fridman, and both linear and non-linear Krylov methods based on Fletcher-Reeves, Polak-Ribiere, and Hestenes-Stiefel Conjugate Gradients. The structures of the up-to-date highest-performing algorithms are presented, based on an operator scheme, which permits one to exploit the power of fast Fourier transforms. Using such an implementation of the generalized Wiener-filter in the novel ARGO-software package, the different numerical schemes are benchmarked with 1-, 2-, and 3-dimensional problems including structured white and Poissonian noise, data windowing and blurring effects. A novel numerical Krylov scheme is shown to be superior in terms of performance and fidelity. These fast inverse methods ultimately will enable the application of sampling techniques to explore complex joint posterior distributions. We outline how the space of the dark-matter density field, the peculiar velocity field, and the power spectrum can jointly be investigated by a Gibbs-sampling process. Such a method can be applied for the redshift distortions correction of the observed galaxies and for time-reversal reconstructions of the initial density field.

  7. Inverse operator representations of quantum phase

    E-Print Network [OSTI]

    G. M. Saxena

    2008-03-14T23:59:59.000Z

    We define quantum phase in terms of inverses of annihilation and creation operators. We show that like Susskind - Glogower phase operators, the measured phase operators and the unitary phase operators can be defined in terms of the inverse operators. However, for the unitary phase operator the Hilbert space includes the negative energy states. The quantum phase in inverse operator representation may find the applications in the field of quantum optics particularly in the squeezed states.

  8. Joint measurability through Naimark's theorem

    E-Print Network [OSTI]

    Roberto Beneduci

    2014-04-05T23:59:59.000Z

    We use Naimark's dilation theorem in order to characterize the joint measurability of two POVMs. Then, we analyze the joint measurability of two commutative POVMs $F_1$ and $F_2$ which are the smearing of two self-adjoint operators $A_1$ and $A_2$ respectively. We prove that the compatibility of $F_1$ and $F_2$ is connected to the existence of two compatible self-adjoint dilations $A_1^+$ and $A_2^+$ of $A_1$ and $A_2$ respectively. As a corollary we prove that each couple of self-adjoint operators can be dilated to a couple of compatible self-adjoint operators. Next, we analyze the joint measurability of the unsharp position and momentum observables and show that it provides a master example of the scheme we propose. Finally, we give a sufficient condition for the compatibility of two effects.

  9. Linear conic optimization for inverse optimal control

    E-Print Network [OSTI]

    Edouard Pauwels

    2014-11-05T23:59:59.000Z

    Nov 5, 2014 ... Abstract: We address the inverse problem of Lagrangian identification based on trajectories in the context of nonlinear optimal control.

  10. INVERSE SCATTERING OF SEISMIC DATA WITH THE ...

    E-Print Network [OSTI]

    1910-61-22T23:59:59.000Z

    We discuss the inverse scattering of seismic reflection data making use of the generalized Radon transform. Through an extension, the relevant transform attains ...

  11. Inverse hydrochemical models of aqueous extracts tests

    E-Print Network [OSTI]

    Zheng, L.

    2010-01-01T23:59:59.000Z

    Samper, J. , Yang, C. , Montenegro, L. , 2003. Users ManualSamper, J. , Vázquez, A. , Montenegro, L. , 2005. Inverse563. Samper, J. , Zhang, G. , Montenegro, L. , 2006. Coupled

  12. Fast methods for inverse wave scattering problems

    E-Print Network [OSTI]

    Lee, Jung Hoon, Ph. D. Massachusetts Institute of Technology

    2008-01-01T23:59:59.000Z

    Inverse wave scattering problems arise in many applications including computerized/diffraction tomography, seismology, diffraction/holographic grating design, object identification from radar singals, and semiconductor ...

  13. A typology of Bantu subject inversion

    E-Print Network [OSTI]

    Marten, Lutz; van der Wal, Jenneke

    2015-01-01T23:59:59.000Z

    generalisations are drawn. For example, languages with instrument inversion or with patient inversion always have locative inversion (but not vice versa), or if a language has at least one inversion construction, it always has at least either default agreement... ): (36) Se-tulo seo ba-sadi ba-se-rek-ile-ng kajeno … [Sesotho] 7-chair REL7 2-woman SM2-OM7-buy-PRF-REL today ‘The chair which the women bought today …’ (37) Mbatya dza-va-ka-son-er-a va-kadzi [Shona] 10.clothes REL10-SM2...

  14. Joint Fuel Cell Technologies and Advanced Manufacturing Webinar...

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

    Joint Fuel Cell Technologies and Advanced Manufacturing Webinar Joint Fuel Cell Technologies and Advanced Manufacturing Webinar Presentation slides from the joint Fuel Cell...

  15. Joint Technical Operations Team | National Nuclear Security Administra...

    National Nuclear Security Administration (NNSA)

    Render Safe Joint Technical Operations Team Joint Technical Operations Team JTOT Logo NNSA's Joint Technical Operations Team (JTOT) provides specialized technical...

  16. Summarizing and Mining Inverse Distributions on Data Streams via Dynamic Inverse Sampling

    E-Print Network [OSTI]

    Cormode, Graham

    Summarizing and Mining Inverse Distributions on Data Streams via Dynamic Inverse Sampling Graham data stream management systems approach this problem by sum- marizing and mining the distributions for summariz- ing and mining inverse distributions of data streams: they rely on a novel technique to maintain

  17. Time-lapse seismic modeling and production data assimilation for enhanced oil recovery and CO2 sequestration

    E-Print Network [OSTI]

    Kumar, Ajitabh

    2009-05-15T23:59:59.000Z

    gases into the earth’s atmosphere. Numerical simulators are used for designing and predicting the complex behavior of systems under such scenarios. Two key steps in such studies are forward modeling for performance prediction based on simulation studies...

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

    E-Print Network [OSTI]

    Shekhar, Ravi

    2009-05-15T23:59:59.000Z

    LIST OF FIGURES FIGURE Page 2.1 Dependence of attenuation on (a) crack radius (b) crack density (c) matrix porosity and (d) matrix permeability in brine (solid line) and SCF CO 2 (dashed line). The vertical bars represents seismic frequency zone... et al. (2000) suggested an expression for the e?ective tensor of elastic constants C of cracked material in terms of perturbations to the moduli of the uncracked host rock. The perturbations are expressed in powers of crack density epsilon1 = ?a 3...

  19. Time-lapse gravity monitoring: A systematic 4D approach with application to aquifer storage and recovery

    E-Print Network [OSTI]

    . An abandoned underground coal mine has been developed into a subsurface water reservoir. Water from surface reservoirs use valuable land needed for develop- ment or the preservation of open space and can have of such reservoirs can reach tens of millions of dollars. The aquifer storage recovery ASR process Pyne, 1995 pro

  20. Temporal changes in gas hydrate mound topography and ecology: deep-sea time-lapse camera observations

    E-Print Network [OSTI]

    Vardaro, Michael Fredric

    2004-09-30T23:59:59.000Z

    . This is significant because methane is an important greenhouse gas trapping solar energy and contributing to global warming (Kvenvolden 1999). It has been observed that as water temperature increases gas hydrate begins to dissociate, releasing trapped gas (Mac... (Trehu, et al. 1999). If global warming results in an increase in global ocean temperatures, or if a seismic event destabilizes a large gas hydrate reservoir (Fig. I-3), it could result in the release of gas hydrate-bound methane into the water column...

  1. HLYWD: a program for post-processing data files to generate selected plots or time-lapse graphics

    SciTech Connect (OSTI)

    Munro, J.K. Jr.

    1980-05-01T23:59:59.000Z

    The program HLYWD is a post-processor of output files generated by large plasma simulation computations or of data files containing a time sequence of plasma diagnostics. It is intended to be used in a production mode for either type of application; i.e., it allows one to generate along with the graphics sequence, segments containing title, credits to those who performed the work, text to describe the graphics, and acknowledgement of funding agency. The current version is designed to generate 3D plots and allows one to select type of display (linear or semi-log scales), choice of normalization of function values for display purposes, viewing perspective, and an option to allow continuous rotations of surfaces. This program was developed with the intention of being relatively easy to use, reasonably flexible, and requiring a minimum investment of the user's time. It uses the TV80 library of graphics software and ORDERLIB system software on the CDC 7600 at the National Magnetic Fusion Energy Computing Center at Lawrence Livermore Laboratory in California.

  2. Offered jointly with International Business

    E-Print Network [OSTI]

    Offered jointly with Master in International Business #12;.02 Welcome to Barcelona Welcome to UPF Pompeu Fabra (UPF), in the very heart of Barcelona. UPF is a public institution established in 1990, and is integrated into the urban fabric of the city, contributing to and participating in its dynamism. The UPF has

  3. 2D Joint Inversion Of Dc And Scalar Audio-Magnetotelluric Data...

    Open Energy Info (EERE)

    Authors F. A. M. Santos, A. R. A. Afonso and A. Dupis Published Journal Journal of Geophysics and Engineering, 20070101 DOI Not Provided Check for DOI availability: http:...

  4. Joint inversion of crosshole radar and seismic traveltimes acquired at the South Oyster Bacterial Transport Site

    E-Print Network [OSTI]

    Linde, Niklas

    2008-01-01T23:59:59.000Z

    37 (10), 2431-2456. Linde, N. , A. Binley, A. Tryggvason, L.doi:10.1029/2006WR005131. Linde, N. , S. Finsterle, and S.Tryggvason, A. , and N. Linde, 2006, Local earthquake (LE)

  5. Joint flow-seismic inversion for characterizing fractured reservoirs: theoretical approach and numerical modeling

    E-Print Network [OSTI]

    Kang, Peter K.

    2013-01-01T23:59:59.000Z

    Traditionally, seismic interpretation is performed without any account of the flow behavior. Here, we present a methodology to characterize fractured geologic media by integrating flow and seismic data. The key element of ...

  6. Joint Inversion of Production and Temperature Data Illuminates Vertical Permeability Distribution in Deep Reservoirs

    E-Print Network [OSTI]

    Zhang, Zhishuai

    2012-10-19T23:59:59.000Z

    of Characterization Results Conditioned on Various Observations ......................................................................................... 29 Figure 3-5 MAP Characterization Result with Downhole Temperature Sensors .. 30 Figure 3-6 Production... the lower layer of the reservoir has a higher temperature. Thus, production temperature carries information about hydraulic properties distribution with depth in the reservoir. In addition, the usage of modern monitor technology like permanent downhole...

  7. Joint inversion of electrical and seismic data for Fracture char. and

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment ofLetter Report: I11IG002RTC3 | ofproposalofDepartmentandon

  8. 2D Joint Inversion Of Dc And Scalar Audio-Magnetotelluric Data In The

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1 Wind ProjectsourceInformationColorado School20090: SWRCB

  9. Positive and inverse isotope effect on superconductivity

    E-Print Network [OSTI]

    Tian De Cao

    2009-09-04T23:59:59.000Z

    This article improves the BCS theory to include the inverse isotope effect on superconductivity. An affective model can be deduced from the model including electron-phonon interactions, and the phonon-induced attraction is simply and clearly explained on the electron Green function. The focus of this work is on how the positive or inverse isotope effect occurs in superconductors.

  10. Reservoir Characterization Using Intelligent Seismic Inversion

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    reservoir performance. Field Development #12;- Issues about the data and problems regarding data analysis characterization studies. - Inverse modeling of reservoir properties from the seismic data is known as seismic inversion. SEISMIC LOGS #12;1. Does a relationship exist between seismic data and reservoir characteristics

  11. JOINT PROGRAM IN TRANSPORTATION UNIVERSITY OF TORONTO

    E-Print Network [OSTI]

    Toronto, University of

    JOINT PROGRAM IN TRANSPORTATION UNIVERSITY OF TORONTO 2001 TRANSPORTATION TOMORROW SURVEY of Transportation, Ontario Additions in 1996 Regional Municipalities of Niagara, Waterloo Counties of Peterborough not to participate) #12;JOINT PROGRAM IN TRANSPORTATION UNIVERSITY OF TORONTO 2001 TRANSPORTATION TOMORROW SURVEY

  12. Joint Genome Institute's Automation Approach and History

    E-Print Network [OSTI]

    Roberts, Simon

    2006-01-01T23:59:59.000Z

    Joint Genome Institute’s Automation Approach and Historythroughput environment; – automation does not necessarilyissues “Islands of Automation” – modular instruments with

  13. The Joint Essential Numerical Range of operators

    E-Print Network [OSTI]

    Li, Chi-Kwong

    The Joint Essential Numerical Range of operators: Convexity and Related Results Chi-Kwong Li Classification 47A12, 47A13, 47A55. Keywords Joint essential numerical range, self-adjoint operator, Hilbert the joint behavior of several operators A1, . . . , Am. One may see [1, 5, 12, 14, 15, 16, 19, 23, 28, 31

  14. JOINT DEGREE PROGRAMS DEFINITION AND POLICY

    E-Print Network [OSTI]

    Omiecinski, Curtis

    1 JOINT DEGREE PROGRAMS DEFINITION AND POLICY: Within the fields of medicine and law, dual training for such complementary training can be demonstrated, the creation of a formal "Joint" degree program in which students or MD) offered at Penn State may be warranted. Such Joint degree programs enhance the educational

  15. JOINTLY HYPONORMAL PAIRS OF COMMUTING SUBNORMAL OPERATORS NEED NOT BE JOINTLY SUBNORMAL

    E-Print Network [OSTI]

    Curto, Raúl

    JOINTLY HYPONORMAL PAIRS OF COMMUTING SUBNORMAL OPERATORS NEED NOT BE JOINTLY SUBNORMAL RA´UL E operators, jointly hyponormal but not admitting commuting normal extensions. Each such family can be used] := ST - TS. We say that an n-tuple T = (T1, · · · , Tn) of operators on H is (jointly) hyponormal

  16. READY FOR TODAY. PREPARING FOR TOMORROW. The Joint Operating Environment is intended to inform joint concept

    E-Print Network [OSTI]

    Sainudiin, Raazesh

    READY FOR TODAY. PREPARING FOR TOMORROW. #12;The Joint Operating Environment is intended to inform. Inquiries about the Joint Operating Environment should be directed to USJFCOM Public Affairs, 1562 Mitscher R O N M E N T ( J O E ) #12;While U.S. Joint Forces Command's Joint Operating Environment (JOE

  17. Metal-ceramic joint assembly

    DOE Patents [OSTI]

    Li, Jian (New Milford, CT)

    2002-01-01T23:59:59.000Z

    A metal-ceramic joint assembly in which a brazing alloy is situated between metallic and ceramic members. The metallic member is either an aluminum-containing stainless steel, a high chromium-content ferritic stainless steel or an iron nickel alloy with a corrosion protection coating. The brazing alloy, in turn, is either an Au-based or Ni-based alloy with a brazing temperature in the range of 9500 to 1200.degree. C.

  18. Joint strength in RCS frames

    E-Print Network [OSTI]

    Kirby, Cynthia Dawn

    1998-01-01T23:59:59.000Z

    SETUP 3. 4. 1 Loading System. 3. 4. 2 Deformation Measurements . . . . Vt X111 . 1 . I . 1 . 2 . 3 . . . . 3 . 3 . 4 . 5 . . . 6 . 6 . 6 . 7 . 9 . 11 . 13 . 13 . 13 . 13 . 15 . 15 . 15 . 16 . 17 . 19 . 19 . 20 Page 3. 4... Vertical Bearing. 4. 6. 4 Beam Failure Mechanism. Page 4. 6. 5 Column Failure Mechanism 4. 6. 6 Predicted Failure Mechanisms 4. 7 JOINT STRENGTH PREDICTIONS (DISCONTINUOUS BEAM DIRECTION). 5. RESPONSE 5. 1 INTRODUCTION . . 5. 2. GENERAL BEHAVIOR 5...

  19. acoustic impedance inversion: Topics by E-print Network

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

    Topic Index 1 ACOUSTIC IMPEDANCE INVERSION FOR STATIC AND DYNAMIC CHARACTERIZATION OF A CO2 EOR PROJECT, Fossil Fuels Websites Summary: ACOUSTIC IMPEDANCE INVERSION FOR STATIC...

  20. Local Uniqueness for the Fixed Energy Fixed Angle Inverse Problem ...

    E-Print Network [OSTI]

    Abstract. We prove local uniqueness for the inverse problem in obstacle scattering at a fixed energy and fixed incident angle. We consider the inverse problem of ...

  1. Self-Inverse Interleavers for Turbo Codes

    E-Print Network [OSTI]

    Sakzad, Amin; Panario, Daniel; Eshghi, Nasim

    2010-01-01T23:59:59.000Z

    In this work we introduce and study a set of new interleavers based on permutation polynomials and functions with known inverses over a finite field $\\mathbb{F}_q$ for using in turbo code structures. We use Monomial, Dickson, M\\"{o}bius and R\\'edei functions in order to get new interleavers. In addition we employ Skolem sequences in order to find new interleavers with known cycle structure. As a byproduct we give an exact formula for the inverse of every R\\'edei function. The cycle structure of R\\'edei functions are also investigated. Finally, self-inverse versions of permutation functions are used to construct interleavers. These interleavers are their own de-interleavers and are useful for turbo coding and turbo decoding. Experiments carried out for self-inverse interleavers constructed using these kind of permutation polynomials and functions show excellent agreement with our theoretical results.

  2. Inverse problem for incremental synchrotron radiation

    SciTech Connect (OSTI)

    Fisch, N.J.

    1987-06-01T23:59:59.000Z

    Significantly more information is available from synchrotron emission from a plasma when the plasma is purposefully disturbed. An inverse problem, to deduce properties of the disturbance given time-dependent radiation data, is proposed. The fast time response of radiation detectors is fully exploited by this approach. A special case of interest, perpendicular observation of a steady-state plasma, lends itself to an analytic inversion.

  3. A fluorophosphate-based inverse Keggin structure

    SciTech Connect (OSTI)

    Fielden, John; Quasdorf, Kyle; Cronin, Leroy; Kogerler, Paul

    2012-07-17T23:59:59.000Z

    An unusual PFO(3)(2-)-templated "inverse Keggin" polyanion, [Mo(12)O(46)(PF)(4)](4-), has been isolated from the degradation reaction of an {Mo(132)}-type Keplerate to [PMo(12)O(40)](3-) by [Cu(MeCN)(4)](PF(6)) in acetonitrile. (31)P-NMR studies suggest a structure-directing role for [Cu(MeCN)(4)](+) in the formation of the highly unusual all-inorganic inverse Keggin structure.

  4. Partitioned Waveform Inversion Applied to Eurasia and Northern Africa

    SciTech Connect (OSTI)

    bedle, H; Matzel, E; Flanagan, M

    2006-07-27T23:59:59.000Z

    This report summarizes the data analysis achieved during Heather Bedle's eleven-week Technical Scholar internship at Lawrence Livermore National Labs during the early summer 2006. The work completed during this internship resulted in constraints on the crustal and upper mantle S-velocity structure in Northern Africa, the Mediterranean, the Middle East, and Europe, through the fitting of regional waveform data. This data extends current raypath coverage and will be included in a joint inversion along with data from surface wave group velocity measurements, S and P teleseismic arrival time data, and receiver function data to create an improved velocity model of the upper mantle in this region. The tectonic structure of the North African/Mediterranean/Europe/Middle Eastern study region is extremely heterogeneous. This region consists of, among others, stable cratons and platforms such as the West Africa Craton, and Baltica in Northern Europe; oceanic subduction zones throughout the Mediterranean Sea where the African and Eurasian plate collide; regions of continental collision as the Arabian Plate moves northward into the Turkish Plate; and rifting in the Red Sea, separating the Arabian and Nubian shields. With such diverse tectonic structures, many of the waveforms were difficult to fit. This is not unexpected as the waveforms are fit using an averaged structure. In many cases the raypaths encounter several tectonic features, complicating the waveform, and making it hard for the software to converge on a 1D average structure. Overall, the quality of the waveform data was average, with roughly 30% of the waveforms being discarded due to excessive noise that interfered with the frequency ranges of interest. An inversion for the 3D S-velocity structure of this region was also performed following the methodology of Partitioned Waveform Inversion (Nolet, 1990; Van der Lee and Nolet, 1997). The addition of the newly fit waveforms drastically extends the range of the model. The model now extends as far east in Africa to cover Chad and Niger, and reaches south to cover Zambia. The model is also stretched eastward to cover the eastern half of India, and northward to cover the southern portion of Scandinavia.

  5. INVERSE-SQUARE LAW TESTS 1 TESTS OF THE GRAVITATIONAL

    E-Print Network [OSTI]

    Washington at Seattle, University of - Department of Physics, Electroweak Interaction Research Group

    INVERSE-SQUARE LAW TESTS 1 TESTS OF THE GRAVITATIONAL INVERSE-SQUARE LAW E.G.Adelberger, B-1560 KEYWORDS: gravitation, experimental tests of inverse-square law, quantum gravity, extra dimensions ABSTRACT: We review recent experimental tests of the gravitational inverse-square law, and the wide variety

  6. Joint Center for Artificial Photosynthesis

    SciTech Connect (OSTI)

    Koval, Carl; Lee, Kenny; Houle, Frances; Lewis, Nate

    2013-12-10T23:59:59.000Z

    The Joint Center for Artificial Photosynthesis (JCAP) is the nation's largest research program dedicated to the development of an artificial solar-fuel generation technology. Established in 2010 as a U.S. Department of Energy (DOE) Energy Innovation Hub, JCAP aims to find a cost-effective method to produce fuels using only sunlight, water, and carbon dioxide as inputs. JCAP brings together more than 140 top scientists and researchers from the California Institute of Technology and its lead partner, Berkeley Lab, along with collaborators from the SLAC National Accelerator Laboratory, and the University of California campuses at Irvine and San Diego.

  7. Joint Center for Artificial Photosynthesis

    ScienceCinema (OSTI)

    Koval, Carl; Lee, Kenny; Houle, Frances; Lewis, Nate

    2013-12-19T23:59:59.000Z

    The Joint Center for Artificial Photosynthesis (JCAP) is the nation's largest research program dedicated to the development of an artificial solar-fuel generation technology. Established in 2010 as a U.S. Department of Energy (DOE) Energy Innovation Hub, JCAP aims to find a cost-effective method to produce fuels using only sunlight, water, and carbon dioxide as inputs. JCAP brings together more than 140 top scientists and researchers from the California Institute of Technology and its lead partner, Berkeley Lab, along with collaborators from the SLAC National Accelerator Laboratory, and the University of California campuses at Irvine and San Diego.

  8. Joint DOE-Rosatom Statement

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport(FactDepartment ofLetter Report: I11IG002RTC3 | ofproposalof Energy usJoint

  9. Joint Institutes | ornl.gov

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)Integrated Codes |Is Your Home as Ready for(SC)Joint Genome Institute (JGI)

  10. Joint Announcement | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreaking ofOil & Gas » MethaneJohnson Controls EnergyJoin the EnergyJoin usJoint

  11. Joint Outreach Task Group Calendar: September 2013

    Broader source: Energy.gov [DOE]

    Joint Outreach Task Group (JOTG)has created a monthly calendar of community events to facilitate interagency and community involvement in these events. September 2013

  12. JIBS | Joint Institute for Biological Sciences | ORNL

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

    joint institute is located close to ORNL's Laboratory for Comparative and Functional Genomics, other biomolecular sciences research laboratories, and the Environmental Sciences...

  13. Joint Inference for Competing Risks Data

    E-Print Network [OSTI]

    Li, Gang; Yang, Qing

    2015-01-01T23:59:59.000Z

    N. (1978), “The analysis of failure times in the presence ofall failure types and groups. For regression analysis offailure types. Section 3 develops joint regression analysis

  14. Analysis on the Inverse problem Statistical analysis of the inverse problem

    E-Print Network [OSTI]

    regression This is a non-linear regression model. Assumption : we have equal variance measurement errors and trigonometric forms. #12;Analysis on the Inverse problem Introduction Non-linear regression This is a non-linear on the Inverse problem Introduction Linear and non-linear regression Examples : Linear model y = 0 + 1x + 2x2 y

  15. Inversions in astronomy and the SOLA method

    E-Print Network [OSTI]

    F. P. Pijpers

    1995-06-14T23:59:59.000Z

    This paper was presented at the Institute for Mathematics and its Applications workshop "Inverse problems in wave propagation" and will appear in the series IMA volumes (Springer). A brief overview of applications of inversions within astronomy is presented and also an inventory of techniques commonly in use. Most of this paper is focussed on the method of Subtractive Optimally Localized Averages (SOLA) which is an adaptation of the Backus and Gilbert method. This method was originally developed for use in helioseismology where the Backus and Gilbert method is computationally too slow. Since then it has also been applied to the problem of reverberation mapping of active galactic nuclei and the differences between this inverse problem and the ones of helioseismology are also discussed.

  16. Error handling strategies in multiphase inverse modeling

    SciTech Connect (OSTI)

    Finsterle, S.; Zhang, Y.

    2010-12-01T23:59:59.000Z

    Parameter estimation by inverse modeling involves the repeated evaluation of a function of residuals. These residuals represent both errors in the model and errors in the data. In practical applications of inverse modeling of multiphase flow and transport, the error structure of the final residuals often significantly deviates from the statistical assumptions that underlie standard maximum likelihood estimation using the least-squares method. Large random or systematic errors are likely to lead to convergence problems, biased parameter estimates, misleading uncertainty measures, or poor predictive capabilities of the calibrated model. The multiphase inverse modeling code iTOUGH2 supports strategies that identify and mitigate the impact of systematic or non-normal error structures. We discuss these approaches and provide an overview of the error handling features implemented in iTOUGH2.

  17. EFFECT OF JOINT AUDITOR PAIR ON CONSERVATISM

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 EFFECT OF JOINT AUDITOR PAIR ON CONSERVATISM: EVIDENCE FROM IMPAIRMENT TESTS Gerald Lobo's (1997) measure of conservatism, are more likely to book impairments when operating performance is low requiring joint audit to improve audit quality. Mots clés : Co-commissariat ­ Reconnaissance adéquate des

  18. Joint Fuel Cell Bus Workshop Summary Report

    E-Print Network [OSTI]

    Joint Fuel Cell Bus Workshop Summary Report Prepared for: U.S. Department of Energy (DOE/EERE) U was jointly sponsored by the Energy Efficiency and Renewable Energy office of the DOE and the Federal Transit the entire range of operating conditions and cycles · Cost (manufacturing, capital, operations

  19. ARC Discovery (Joint PhD)

    E-Print Network [OSTI]

    Wang, Yan

    PhD) (Cotutelle) · 2010(MQRES) 2.252009 10% · 2010 · 1.8 1.32012 www.international.mq.edu.au/researchCRICOS Code 00002J " 2014 200 (COREs) " Jim Piper 20091600 (MQRES) (Cotutelle) (Joint PhD) MICHELLEWILSON 20102651 104(Cotutelle) (Joint PhD) #12; (COREs) (Ancient Cultures) -- (Animal Behaviour

  20. United States and France Sign Joint Statement on Civil Liability...

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

    and France Sign Joint Statement on Civil Liability for Nuclear Damage United States and France Sign Joint Statement on Civil Liability for Nuclear Damage Joint Statement Signed.pdf...

  1. Dynamic Behavior of Multiple Inversions Senior Thesis

    E-Print Network [OSTI]

    Popovic, Jovan

    Dynamic Behavior of Multiple Inversions Ilya Baran Senior Thesis Boston University Academy Under functions. To iterate a function means to compose it with itself multiple times. Unless stated otherwise, we a circle centered at O with radius r is a point A 0 on the ray \\Gamma! OA such that OA r = r OA 0 (see

  2. 2, 413445, 2008 Surface inversion on

    E-Print Network [OSTI]

    Boyer, Edmond

    variations in surface flow velocity and topography along a flow line on ice streams and ice sheets of spatial variations in basal topography and basal slipperiness on surface data can be accurately separatedTCD 2, 413­445, 2008 Surface inversion on ice streams G. H. Gudmundsson and M. Raymond Title Page

  3. Wavelet Decomposition Approaches to Statistical Inverse Problems

    E-Print Network [OSTI]

    Abramovich, Felix

    Wavelet Decomposition Approaches to Statistical Inverse Problems BY F. ABRAMOVICH Department alternative is the wavelet­vaguelette decomposition method, based on the expansion of the unknown in wavelet series. In the vaguelette­wavelet decomposition method proposed here, the observed data are expanded

  4. INVERSION FOR APPLIED GEOPHYSICS: A TUTORIAL

    E-Print Network [OSTI]

    Oldenburg, Douglas W.

    INVERSION FOR APPLIED GEOPHYSICS: A TUTORIAL Douglas W. Oldenburg* and Yaoguo Li** * UBC-Geophysical, V6T 1Z4 ** Department of Geophysics, Colorado School of Mines, Golden, Colorado, 80401 INTRODUCTION Throughout this book there are numerous cases where geophysics has been used to help solve practical

  5. Inverse Problems for Fractional Diffusion Equations

    E-Print Network [OSTI]

    Zuo, Lihua

    2013-06-21T23:59:59.000Z

    and preliminaries in Section 1 and 2, in the third section we consider our first inverse boundary problem. This is where an unknown boundary condition is to be determined from overposed data in a time- fractional diffusion equation. Based upon the fundamental...

  6. Focusing Inversion of Electroencephalography and Magnetoencephalography Data

    E-Print Network [OSTI]

    Utah, University of

    or magnetic #12;eld recorded outside of the head. In this paper, we present a new minimization technique to the inverse bioelectric and biomagnetic #12;eld problems are functional brain studies and clinical diagnosis of neural disease, such as epilepsy. In functional brain studies, sensory signals stimulate the subject

  7. Approximating Human Reaching Volumes Using Inverse Kinematics

    E-Print Network [OSTI]

    Rodríguez, Inmaculada

    of reach: standing reach, which is useful in computer animation where virtual humans have to interact. Introduction Virtual Humans are a valuable medium for gaining knowledge and understanding about the human bodyApproximating Human Reaching Volumes Using Inverse Kinematics I. Rodrígueza , M. Peinadoa , R

  8. Global optimization in inverse problem of scatterometry

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Global optimization in inverse problem of scatterometry Lekbir Afraites1,2 Jerome Hazard3 Patrick as a parametric optimization problem using the Least Square criterion. In this work, a design procedure for global robust optimization is developed using Kriging and global optimization approaches. Robustness

  9. Inverse Modeling for Coastal Seawater Intrusion

    E-Print Network [OSTI]

    Politècnica de Catalunya, Universitat

    , USA) #12;INTRODUCTION · Inverse modeling ­ standard tool for groundwater modeling ­ uncommonD3D.1 ­ 2D and 3D finite-element code for simulating variable-density groundwater problems · UCODE 3 and given time (i.e. at one observation location) on one of the parameters in the groundwater model

  10. Joint Statement on the Global Nuclear Energy Partnership and...

    Office of Environmental Management (EM)

    Joint Statement on the Global Nuclear Energy Partnership and Nuclear Energy Cooperation Joint Statement on the Global Nuclear Energy Partnership and Nuclear Energy Cooperation...

  11. acute prosthetic joint: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 110 Joint Degrees & Promotion towards European Students Computer...

  12. alloy lap joint: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 70 Joint Degrees & Promotion towards European Students Computer...

  13. acute neuropathic joint: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 36 Joint Degrees & Promotion towards European Students Computer...

  14. anatomical joint angles: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 110 Joint Degrees & Promotion towards European Students Computer...

  15. atlanto-axial joint: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 13 Joint Degrees & Promotion towards European Students Computer...

  16. aa6056 butt joints: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 55 Joint Degrees & Promotion towards European Students Computer...

  17. acute acromioclavicular joint: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 20 Joint Degrees & Promotion towards European Students Computer...

  18. assessing rheumatic joint: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 46 Joint Degrees & Promotion towards European Students Computer...

  19. artificial joint replacements: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 152 Joint Degrees & Promotion towards European Students Computer...

  20. adhesive lap joints: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 106 Joint Degrees & Promotion towards European Students Computer...

  1. agu joint assembly: Topics by E-print Network

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

    total chip-eluted DNA. unknown authors 465 READY FOR TODAY. PREPARING FOR TOMORROW. The Joint Operating Environment is intended to inform joint concept Mathematics Websites...

  2. ankle joint mobility: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 214 Joint Degrees & Promotion towards European Students Computer...

  3. adhesive bonded joints: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 153 Joint Degrees & Promotion towards European Students Computer...

  4. acromioclavicular joint reconstruction: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 68 Joint Degrees & Promotion towards European Students Computer...

  5. alloy butt joints: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 63 Joint Degrees & Promotion towards European Students Computer...

  6. arthritis wrist joints: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 115 Joint Degrees & Promotion towards European Students Computer...

  7. aluminium alloy joints: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 107 Joint Degrees & Promotion towards European Students Computer...

  8. acromioclavicular joint cyst: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 32 Joint Degrees & Promotion towards European Students Computer...

  9. arthritis metacarpophalangeal joints: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 79 Joint Degrees & Promotion towards European Students Computer...

  10. acromioclavicular joint: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 14 Joint Degrees & Promotion towards European Students Computer...

  11. animals jointly organized: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 109 Joint Degrees & Promotion towards European Students Computer...

  12. anticorrosive field joint: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 48 Joint Degrees & Promotion towards European Students Computer...

  13. atopic eczema joint: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 38 Joint Degrees & Promotion towards European Students Computer...

  14. ankle joint position: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 205 Joint Degrees & Promotion towards European Students Computer...

  15. adhesively bonded joints: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 153 Joint Degrees & Promotion towards European Students Computer...

  16. articular process joints: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 146 Joint Degrees & Promotion towards European Students Computer...

  17. atlanto-occipital joint: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 15 Joint Degrees & Promotion towards European Students Computer...

  18. Joint Institute for Neutron Sciences | ornl.gov

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

    Joint Institute for Neutron Sciences SHARE Joint Institute for Neutron Sciences JINS is located on Chestnut Ridge within the 80-acre SNS site, part of Oak Ridge National...

  19. New Report Describes Joint Opportunities for Natural Gas and...

    Office of Environmental Management (EM)

    New Report Describes Joint Opportunities for Natural Gas and Hydrogen Fuel Cell Vehicle Markets New Report Describes Joint Opportunities for Natural Gas and Hydrogen Fuel Cell...

  20. Sandia National Laboratories: New Report Describes Joint Opportunities...

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

    bilitiesCapabilitiesNew Report Describes Joint Opportunities for Natural Gas and Hydrogen Fuel-Cell Vehicle Markets New Report Describes Joint Opportunities for Natural Gas and...

  1. Phosphine oxide derivatives as hosts for blue phosphors: A joint...

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

    oxide derivatives as hosts for blue phosphors: A joint theoretical and experimental study of their electronic Phosphine oxide derivatives as hosts for blue phosphors: A joint...

  2. OMB and CEQ Joint Memorandum on Environmental Collaboration and...

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

    Joint Memorandum on Environmental Collaboration and Conflict Resolution This Office of Management and Budget (OMB) and Council on Environmental Quality (CEQ) joint memorandum...

  3. National Report Joint Convention on the Safety of Spent Fuel...

    Office of Environmental Management (EM)

    National Report Joint Convention on the Safety of Spent Fuel Management and on the Safety of Radioactive Waste Management National Report Joint Convention on the Safety of Spent...

  4. application driven joint: Topics by E-print Network

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

    This applica- tion is particularly challenging due to its demand for multiple concurrent media Smith, Jonathan M. 60 JOINT SEMINAR FINAL REPORT Mathematics Websites Summary: JOINT...

  5. Sealed joint structure for electrochemical device

    DOE Patents [OSTI]

    Tucker, Michael C; Jacobson, Craig P; De Jonghe, Lutgard C; Visco, Steven J

    2013-05-21T23:59:59.000Z

    Several members make up a joint in a high-temperature electrochemical device, wherein the various members perform different functions. The joint is useful for joining multiple cells (generally tubular modules) of an electrochemical device to produce a multi-cell segment-in-series stack for a solid oxide fuel cell, for instance. The joint includes sections that bond the joining members to each other; one or more seal sections that provide gas-tightness, and sections providing electrical connection and/or electrical insulation between the various joining members. A suitable joint configuration for an electrochemical device has a metal joint housing, a first porous electrode, a second porous electrode, separated from the first porous electrode by a solid electrolyte, and an insulating member disposed between the metal joint housing and the electrolyte and second electrode. One or more brazes structurally and electrically connects the first electrode to the metal joint housing and forms a gas tight seal between the first electrode and the second electrode.

  6. INSPECTION OF FUSION JOINTS IN PLASTIC PIPE

    SciTech Connect (OSTI)

    Alex Savitski; Connie Reichert; John Coffey

    2005-07-13T23:59:59.000Z

    The standard method of joining plastic pipe in the field is the butt fusion process. As in any pipeline application, joint quality greatly affects overall operational safety of the system. Currently no simple, reliable, cost effective method of assessing the quality of fusion joints in the field exists. Visual examination and pressure testing are current non-destructive approaches, which do not provide any assurance about the long-term pipeline performance. This project will develop, demonstrate, and validate an in-situ non-destructive inspection method for butt fusion joints in gas distribution plastic pipelines. The inspection system will include a laser based image-recognition system that will automatically generate and interpret digital images of pipe joints and assign them a pass/fail rating, which eliminates operator bias in evaluating joint quality. A Weld Zone Inspection Method (WZIM) is being developed in which local heat is applied to the joint region to relax the residual stresses formed by the original joining operation and reveal the surface condition of the joint. In cases where the joint is not formed under optimal conditions, and the intermolecular forces between contacting surfaces are not strong enough, the relaxation of macromolecules in the surface layer causes the material to pull back, revealing a fusion line. If the joint is sound, the bond line image does not develop. To establish initial feasibility of the approach, welds were performed under standard and nonstandard conditions. These welds were subjected to the WZIM and tensile testing. There appears to be a direct correlation between the WZIM and tensile testing results. Although WZIM appears to be more sensitive than tensile testing can verify, the approach appears valid.

  7. INSPECTION OF FUSION JOINTS IN PLASTIC PIPE

    SciTech Connect (OSTI)

    Alex Savitski; Connie Reichert; John Coffey

    2004-07-13T23:59:59.000Z

    The standard method of joining plastic pipe in the field is the butt fusion process. As in any pipeline application, joint quality greatly affects overall operational safety of the system. Currently no simple, reliable, cost effective method of assessing the quality of fusion joints in the field exists. Visual examination and pressure testing are current non-destructive approaches, which do not provide any assurance about the long-term pipeline performance. This project will develop, demonstrate, and validate an in-situ non-destructive inspection method for butt fusion joints in gas distribution plastic pipelines. The inspection system will include a laser based image-recognition system that will automatically generate and interpret digital images of pipe joints and assign them a pass/fail rating, which eliminates operator bias in evaluating joint quality. A Weld Zone Inspection Method (WZIM) is being developed in which local heat is applied to the joint region to relax the residual stresses formed by the original joining operation and reveal the surface condition of the joint. In cases where the joint is not formed under optimal conditions, and the intermolecular forces between contacting surfaces are not strong enough, the relaxation of macromolecules in the surface layer causes the material to pull back, revealing a fusion line. If the joint is sound, the bond line image does not develop. To establish initial feasibility of the approach, welds were performed under standard and non-standard conditions. These welds were subjected to the WZIM and tensile testing. There appears to be a direct correlation between the WZIM and tensile testing results. Although WZIM appears to be more sensitive than tensile testing can verify, the approach appears valid.

  8. Inspection of Fusion Joints in Plastic Pipe

    SciTech Connect (OSTI)

    Connie Reichert

    2005-09-01T23:59:59.000Z

    The standard method of joining plastic pipe in the field is the butt fusion process. As in any pipeline application, joint quality greatly affects overall operational safety of the system. Currently no simple, reliable, cost-effective method exists for assessing the quality of fusion joints in the field. Visual examination and pressure testing are current nondestructive approaches, which do not provide any assurance about the long-term pipeline performance. This project developed, demonstrated, and validated an in-situ nondestructive inspection method for butt fusion joints in gas distribution plastic pipelines. The inspection system includes a laser-based image-recognition system that automatically generates and interprets digital images of pipe joints and assigns them a pass/fail rating, which eliminates operator bias in evaluating joint quality. An EWI-patented process, the Weld Zone Inspection Method (WZIM) was developed in which local heat is applied to the joint region to relax the residual stresses formed by the original joining operation, which reveals the surface condition of the joint. In cases where the joint is not formed under optimal conditions, and the intermolecular forces between contacting surfaces are not strong enough, the relaxation of macromolecules in the surface layer causes the material to pull back, revealing a fusion line. If the joint is sound, the bond line image does not develop. To establish initial feasibility of the approach, welds were performed under standard and nonstandard conditions. These welds were subjected to the WZIM and two destructive forms of testing: short-term tensile testing and long-term creep rupture testing. There appears to be a direct correlation between the WZIM and the destructive testing results. Although WZIM appears to be more sensitive than destructive testing can verify, the approach appears valid.

  9. Inverse modeling of partitioning interwell tracer tests: A streamline approach

    E-Print Network [OSTI]

    Datta-Gupta, Akhil

    computations, inverse modeling 1. Introduction [2] It is recognized that the presence of nonaqueous phaseInverse modeling of partitioning interwell tracer tests: A streamline approach Akhil Datta orders of magnitude. INDEX TERMS: 1832 Hydrology: Groundwater transport; 1829 Hydrology: Groundwater

  10. Subject Inversion in French. The Limits of Information Structure

    E-Print Network [OSTI]

    Boyer, Edmond

    Marie Lit. the book that has written Marie b. Presentative inversion [pres-inv]: Alors entra un soldat

  11. Fractal Inverse Problem: Approximation Formulation and Differential Methods

    E-Print Network [OSTI]

    Guérin, Eric

    Fractal Inverse Problem: Approximation Formulation and Differential Methods ´Eric Gu´erin1 Introduction 1.1 Fractal Inverse Problem The fractal inverse problem is an important research area with a great number of potential application fields. It consists in finding a fractal model or code that generates

  12. Parallel matrix inversion for the revised simplex method -A study

    E-Print Network [OSTI]

    Hall, Julian

    Parallel matrix inversion for the revised simplex method - A study Julian Hall School of Mathematics University of Edinburgh June 15th 2006 Parallel matrix inversion for the revised simplex method - a study #12;Overview · Nature of the challenge of matrix inversion for the revised simplex method #12

  13. Parallel matrix inversion for the revised simplex method -A study

    E-Print Network [OSTI]

    Hall, Julian

    Parallel matrix inversion for the revised simplex method - A study Julian Hall School of Mathematics University of Edinburgh June 15th 2006 Parallel matrix inversion for the revised simplex method - a study #12;Overview · Nature of the challenge of matrix inversion for the revised simplex method

  14. Experimental Observation of Femtosecond Electron Beam Microbunching by Inverse

    E-Print Network [OSTI]

    Brookhaven National Laboratory

    Experimental Observation of Femtosecond Electron Beam Micro­bunching by Inverse Free­Electron­Laser scale of ß 2.5 ¯m by an Inverse Free Electron Laser (IFEL) accelerator was observed. The optimum Cerenkov accelerator (ICA)[5], inverse free electron laser (IFEL) [6] and plasma laser accelerators [7, 8

  15. LITHOLOGY-FLUID INVERSION FROM PRESTACK SEISMIC DATA

    E-Print Network [OSTI]

    Eidsvik, Jo

    LITHOLOGY-FLUID INVERSION FROM PRESTACK SEISMIC DATA MARIT ULVMOEN Department of Mathematical of the study is on lithology-fluid inversion from prestack seismic data in a 3D reservoir. The inversion relates the lithology-fluid classes to elastic variables and the seismic data, and it follows the lines

  16. OXFORD UNIVERSITY JOINT COMMITTEE FOR MATHEMATICS AND

    E-Print Network [OSTI]

    OXFORD UNIVERSITY JOINT COMMITTEE FOR MATHEMATICS AND PHILOSOPHY October 2014 Programme: for Mathematics, Statistics and Operational Research, and for Philosophy. http · to provide, within the supportive and stimulating environment of the collegiate university, a course

  17. Safety Monitor Joint Working Group (JWG) Tour

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

    4 th Meeting of the Joint Working Group of the U.S.-Japan Coordinating Committee of Fusion Energy on Safety in Inter-Institutional Collaborations (U.S.-Japan Safety Monitoring...

  18. Joint Actinide Shock Physics Experimental Research - JASPER

    ScienceCinema (OSTI)

    None

    2015-01-09T23:59:59.000Z

    Commonly known as JASPER the Joint Actinide Shock Physics Experimental Research facility is a two stage light gas gun used to study the behavior of plutonium and other materials under high pressures, temperatures, and strain rates.

  19. Joint microseismic event location with uncertain velocity

    E-Print Network [OSTI]

    Poliannikov, Oleg V.

    2013-01-01T23:59:59.000Z

    We study the problem of the joint location of seismic events using an array of receivers. We show that locating multiple seismic events simultaneously is advantageous compared to the more traditional approaches of locating ...

  20. 2015 Joint Capability Technology Demonstration Industry Day

    Broader source: Energy.gov [DOE]

    The Smart Power Infrastructure Demonstration for Energy Reliability and Security (SPIDERS) Joint Capability Technology Demonstration (JCTD) Phase 3 Industry Day will be on August 27, 2015, from 8 a.m. to noon at the Hawaii Convention Center.

  1. Joint Actinide Shock Physics Experimental Research - JASPER

    SciTech Connect (OSTI)

    None

    2014-10-31T23:59:59.000Z

    Commonly known as JASPER the Joint Actinide Shock Physics Experimental Research facility is a two stage light gas gun used to study the behavior of plutonium and other materials under high pressures, temperatures, and strain rates.

  2. Joint Genome Institute's Automation Approach and History

    SciTech Connect (OSTI)

    Roberts, Simon

    2006-07-05T23:59:59.000Z

    Department of Energy/Joint Genome Institute (DOE/JGI) collaborates with DOE national laboratories and community users, to advance genome science in support of the DOE missions of clean bio-energy, carbon cycling, and bioremediation.

  3. SPIDERS Joint Capability Technology Demonstration Industry Day

    Broader source: Energy.gov [DOE]

    The Smart Power Infrastructure Demonstration for Energy Reliability and Security (SPIDERS) Joint Capability Technology Demonstration (JCTD) Industry Day occurred April 22, 2014, from 8 a.m. to 1:30 p.m. at Fort Carson, Colorado.

  4. CHARACTERIZATION OF DAMPING IN BOLTED LAP JOINTS

    SciTech Connect (OSTI)

    C. MALONEY; D. PEAIRS; ET AL

    2000-08-01T23:59:59.000Z

    The dynamic response of a jointed beam was measured in laboratory experiments. The data were analyzed and the system was mathematically modeled to establish plausible representations of joint damping behavior. Damping is examined in an approximate, local linear framework using log decrement and half power bandwidth approaches. in addition, damping is modeled in a nonlinear framework using a hybrid surface irregularities model that employs a bristles-construct. Experimental and analytical results are presented.

  5. Feature selection for automatic solder joint inspection

    E-Print Network [OSTI]

    Lee, Cheng-Cheng

    1987-01-01T23:59:59.000Z

    - heating Wave Soldering Drag Soldering Post- soldering Cleaning Inspection and Testing Vapor So Ide ring Fig. 2. 3 Typical Soldering Process 12 (5) simplicity of repair, (6) visual inspectability. The first three properties depend upon both.../testing after the soldering. Good joints after inspection can be sent to the testing process directly, while bad joints should be returned to be touched up by the operator. The types of test depend upon the product. For a typical PC board, electrical test...

  6. Equation of state and helioseismic inversions

    E-Print Network [OSTI]

    Sarbani Basu; J. Christensen-Dalsgaard

    1997-02-19T23:59:59.000Z

    Inversions to determine the squared isothermal sound speed and density within the Sun often use the helium abundance Y as the second parameter. This requires the explicit use of the equation of state (EOS), thus potentially leading to systematic errors in the results if the equations of state of the reference model and the Sun are not the same. We demonstrate how this potential error can be suppressed. We also show that it is possible to invert for the intrinsic difference in the adiabatic exponent Gamma_1 between two equations of state. When applied to solar data such inversion rules out the EFF equation of state completely, while with existing data it is difficult to distinguish between other equations of state.

  7. The Product Form of the Inverse

    E-Print Network [OSTI]

    Ward, Everett Bascomb

    1966-01-01T23:59:59.000Z

    the equations as follows: 19 s(1) X2 = El A2, or 0 0 1 2 1 1 0 0 0 1 v = Lo, 3, 0], and E (&) 2 1 0 0 0 ? 0 1 3 I 0 0 1 the inverse A2 of the new matrix A2 is computed. as follows: A -1 Es(2)A -1 Es(2)Es(1) 2 2 1 2 1 or ? -1 A2 1 0 0 0 ? 0.... column vector v of the elementary matrix E 3 is given by the equation of (2, 16 i as v = [-l, p, 2j, 1 1 thus Es{3) 3 0 -1 1 1 0 1 2 Therefore, the inverse A of A is computed by the equation -1 of (2. 10) as follows: A-1 = A -1 ? Es( A -1 Es(3...

  8. Regularity of mappings inverse to Sobolev mappings

    SciTech Connect (OSTI)

    Vodop'yanov, Sergei K [S.L. Sobolev Institute for Mathematics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk (Russian Federation)

    2012-10-31T23:59:59.000Z

    For homeomorphisms {phi}:{Omega}{yields}{Omega}' on Euclidean domains in R{sup n}, n{>=}2, necessary and sufficient conditions ensuring that the inverse mapping belongs to a Sobolev class are investigated. The result obtained is used to describe a new two-index scale of homeomorphisms in some Sobolev class such that their inverses also form a two-index scale of mappings, in another Sobolev class. This scale involves quasiconformal mappings and also homeomorphisms in the Sobolev class W{sup 1}{sub n-1} such that rankD{phi}(x){<=}n-2 almost everywhere on the zero set of the Jacobian det D{phi}(x). Bibliography: 65 titles.

  9. Seismic velocity inversion by differential semblance optimization

    SciTech Connect (OSTI)

    Gockenbach, M.; Symes, W.; Tapia, R.

    1994-12-31T23:59:59.000Z

    Differential Semblance Optimization (DSO) is a novel way of approaching certain inverse problems that arise in exploration seismology. The standard method of formulating these inverse problems -- Output Least-Squares (OLS) -- leads to a highly nonconvex objective function and therefore to a global optimization problem. The OLS problem can be rewritten as a partially linear least-squares problem with linear constraints, with the DSO objective function derived from the quadratic penalty function for this problem. It is shown that, because of the nature of the operators in this problem, the penalty function leads to a globalization procedure: for suitably small values of the penalty parameter, the global minimum of the DSO objective function can be found using local optimization techniques. There is then a path of minimizers, parameterized by the penalty constant, leading to the solution of the OLS problem.

  10. Inverse free-electron laser accelerator

    SciTech Connect (OSTI)

    Pellegrini, C.; Campisi, R.

    1982-01-01T23:59:59.000Z

    We first describe the basic physical properties of an inverse free-electron laser and make an estimate of the order of magnitude of the accelerating field obtainable with such a system; then apply the general ideas to the design of an actual device and through this example we give a more accurate evaluation of the fundamental as well as the technical limitations that this acceleration scheme imposes.

  11. JointResearchCentre THE WATER FRAMEWORK DIRECTIVE

    E-Print Network [OSTI]

    Commission *Directorate General Environment **Joint Research Centre #12;Evolvement of the EU Water.for operational methods and other supporting tools. ll Joint efforts and activities by all involved partiesJointJointResearchCentre THE WATER FRAMEWORK DIRECTIVE: THE CHALLENGES OF TESTING AND VALIDATION

  12. Computationally efficient Bayesian inference for inverse problems.

    SciTech Connect (OSTI)

    Marzouk, Youssef M.; Najm, Habib N.; Rahn, Larry A.

    2007-10-01T23:59:59.000Z

    Bayesian statistics provides a foundation for inference from noisy and incomplete data, a natural mechanism for regularization in the form of prior information, and a quantitative assessment of uncertainty in the inferred results. Inverse problems - representing indirect estimation of model parameters, inputs, or structural components - can be fruitfully cast in this framework. Complex and computationally intensive forward models arising in physical applications, however, can render a Bayesian approach prohibitive. This difficulty is compounded by high-dimensional model spaces, as when the unknown is a spatiotemporal field. We present new algorithmic developments for Bayesian inference in this context, showing strong connections with the forward propagation of uncertainty. In particular, we introduce a stochastic spectral formulation that dramatically accelerates the Bayesian solution of inverse problems via rapid evaluation of a surrogate posterior. We also explore dimensionality reduction for the inference of spatiotemporal fields, using truncated spectral representations of Gaussian process priors. These new approaches are demonstrated on scalar transport problems arising in contaminant source inversion and in the inference of inhomogeneous material or transport properties. We also present a Bayesian framework for parameter estimation in stochastic models, where intrinsic stochasticity may be intermingled with observational noise. Evaluation of a likelihood function may not be analytically tractable in these cases, and thus several alternative Markov chain Monte Carlo (MCMC) schemes, operating on the product space of the observations and the parameters, are introduced.

  13. Inverse hydrochemical models of aqueous extracts tests

    SciTech Connect (OSTI)

    Zheng, L.; Samper, J.; Montenegro, L.

    2008-10-10T23:59:59.000Z

    Aqueous extract test is a laboratory technique commonly used to measure the amount of soluble salts of a soil sample after adding a known mass of distilled water. Measured aqueous extract data have to be re-interpreted in order to infer porewater chemical composition of the sample because porewater chemistry changes significantly due to dilution and chemical reactions which take place during extraction. Here we present an inverse hydrochemical model to estimate porewater chemical composition from measured water content, aqueous extract, and mineralogical data. The model accounts for acid-base, redox, aqueous complexation, mineral dissolution/precipitation, gas dissolution/ex-solution, cation exchange and surface complexation reactions, of which are assumed to take place at local equilibrium. It has been solved with INVERSE-CORE{sup 2D} and been tested with bentonite samples taken from FEBEX (Full-scale Engineered Barrier EXperiment) in situ test. The inverse model reproduces most of the measured aqueous data except bicarbonate and provides an effective, flexible and comprehensive method to estimate porewater chemical composition of clays. Main uncertainties are related to kinetic calcite dissolution and variations in CO2(g) pressure.

  14. Joint inversion of marine seismic AVA and CSEM data using statistical rock-physics models and Markov random fields: Stochastic inversion of AVA and CSEM data

    E-Print Network [OSTI]

    Chen, J.

    2013-01-01T23:59:59.000Z

    seismic AVA and CSEM data for reservoir parameter estimationseismic AVA and CSEM data for reservoir parameter estimationCSEM and seismic data for reservoir parameters based on

  15. The inverse hexagonal ? inverse ribbon ? lamellar gel phase transition sequence in low hydration DOPC:DOPE phospholipid mixtures

    SciTech Connect (OSTI)

    Kent, B.; Garvey, C.J.; Cookson, D.; Bryant, G.; (Aust.Synch.); (ANSTO); (RMIT)

    2009-01-05T23:59:59.000Z

    The inverse hexagonal to inverse ribbon phase transition in a mixed phosphatidylcholine-phosphatidylethanolamine system at low hydration is studied using small and wide angle X-ray scattering. It is found that the structural parameters of the inverse hexagonal phase are independent of temperature. By contrast the length of each ribbon of the inverse ribbon phase increases continuously with decreasing temperature over a range of 50 C. At low temperatures the inverse ribbon phase is observed to have a transition to a gel lamellar phase, with no intermediate fluid lamellar phase. This phase transition is confirmed by differential scanning calorimetry.

  16. Qualification of the Joints for the ITER Central Solenoid

    SciTech Connect (OSTI)

    Martovetsky, N; Berryhill, A; Kenney, S

    2011-09-01T23:59:59.000Z

    The ITER Central Solenoid has 36 interpancake joints, 12 bus joints, and 12 feeder joints in the magnet. The joints are required to have resistance below 4 nOhm at 45 kA at 4.5 K. The US ITER Project Office developed two different types of interpancake joints with some variations in details in order to find a better design, qualify the joints, and establish a fabrication process. We built and tested four samples of the sintered joints and two samples with butt-bonded joints (a total of eight joints). Both designs met the specifications. Results of the joint development, test results, and selection of the baseline design are presented and discussed in the paper. The ITER Central Solenoid (CS) consists of six modules. Each module is composed of six wound hexapancakes and one quadrapancake. The multipancakes are connected electrically and hydraulically by in-line interpancake joints. The joints are located at the outside diameter (OD) of the module. Cable in conduit conductor (CICC) high-current joints are critical elements in the CICC magnets. In addition to low resistivity, the CS joints must fit a space envelope equivalent to the regular conductor cross section and must have low hydraulic impedance and enough structural strength to withstand the hoop and compressive forces during operation, including cycling. This paper is the continuation of the work reported on the intermodule joints.

  17. Handbook on dynamics of jointed structures.

    SciTech Connect (OSTI)

    Ames, Nicoli M.; Lauffer, James P.; Jew, Michael D.; Segalman, Daniel Joseph; Gregory, Danny Lynn; Starr, Michael James; Resor, Brian Ray

    2009-07-01T23:59:59.000Z

    The problem of understanding and modeling the complicated physics underlying the action and response of the interfaces in typical structures under dynamic loading conditions has occupied researchers for many decades. This handbook presents an integrated approach to the goal of dynamic modeling of typical jointed structures, beginning with a mathematical assessment of experimental or simulation data, development of constitutive models to account for load histories to deformation, establishment of kinematic models coupling to the continuum models, and application of finite element analysis leading to dynamic structural simulation. In addition, formulations are discussed to mitigate the very short simulation time steps that appear to be required in numerical simulation for problems such as this. This handbook satisfies the commitment to DOE that Sandia will develop the technical content and write a Joints Handbook. The content will include: (1) Methods for characterizing the nonlinear stiffness and energy dissipation for typical joints used in mechanical systems and components. (2) The methodology will include practical guidance on experiments, and reduced order models that can be used to characterize joint behavior. (3) Examples for typical bolted and screw joints will be provided.

  18. Center for Inverse Design: Staff Biographies

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWPSuccess StoriesFebruaryMetalControlInverse Design Organization

  19. Joint measurability, steering and entropic uncertainty

    E-Print Network [OSTI]

    H. S. Karthik; A. R. Usha Devi; A. K. Rajagopal

    2014-12-02T23:59:59.000Z

    The notion of incompatibility of measurements in quantum theory is in stark contrast with the corresponding classical perspective, where all physical observables are jointly measurable. It is of interest to examine if the results of two or more measurements in the quantum scenario can be perceived from a classical point of view or they still exhibit non-classical features. Clearly, commuting observables can be measured jointly using projective measurements and their statistical outcomes can be discerned classically. However, such simple minded association of compatibility of measurements with commutativity turns out to be limited in an extended framework, where the usual notion of sharp projective valued measurements of self adjoint observables gets broadened to include unsharp measurements of generalized observables constituting positive operator valued measures (POVM). There is a surge of research activity recently towards gaining new physical insights on the emergence of classical behavior via joint measurability of unsharp observables. Here, we explore the entropic uncertainty relation for a pair of discrete observables (of Alice's system) when an entangled quantum memory of Bob is restricted to record outcomes of jointly measurable POVMs only. Within the joint measurability regime, the sum of entropies associated with Alice's measurement outcomes - conditioned by the results registered at Bob's end - are constrained to obey an entropic steering inequality. In this case, Bob's non-steerability reflects itself as his inability in predicting the outcomes of Alice's pair of non-commuting observables with better precision, even when they share an entangled state. As a further consequence, the quantum advantage envisaged for the construction of security proofs in key distribution is lost, when Bob's measurements are restricted to the joint measurability regime.

  20. Joint resummation for heavy quark production.

    E-Print Network [OSTI]

    Banfi, Andrea; Laenen, Eric

    ar X iv :h ep -p h/ 05 10 14 9v 1 1 2 O ct 2 00 5 February 2, 2008 4:14 WSPC/INSTRUCTION FILE jr International Journal of Modern Physics A c© World Scientific Publishing Company JOINT RESUMMATION FOR HEAVY QUARK PRODUCTION ANDREA BANFI Cavendish... hadroproduction, at next-to-leading logarithmic accuracy. We exhibit their dependence on the production channel and the color configurations, and compare these distributions to eachother and to NLO. Keywords: Resummation; heavy quark production. 1. Joint threshold...

  1. Joint Genome Institute (JGI) Projects at NERSC

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)Integrated Codes |Is Your Home as Ready for(SC)Joint Genome Institute (JGI) Joint

  2. Joint Faculty Appointments | ornl.gov

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron beamJoin HERO Mariners vs.Joint EnvironmentalJoint

  3. Contact stress in a whole joint bioreactor : intrinsic levels & augmentation by external loading

    E-Print Network [OSTI]

    Deppe, Allison Margaret

    2007-01-01T23:59:59.000Z

    Stress in a Whole Joint Bioreactor: Intrinsic Levels &Stress in a Whole Joint Bioreactor: Intrinsic levels &Sah, Chair A whole joint bioreactor was recently described

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

    Open Energy Info (EERE)

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

  5. Advanced Imaging and Ultra-fast Material Probing With Inverse...

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

    Imaging and Ultra-fast Material Probing With Inverse Compton Scattering A proposal to the Brookhaven Accelerator Test Facility Gerard Andonian, Alberto Bacci, Ubaldo...

  6. A Target-Oriented Magnetotelluric Inversion Approach For Characterizin...

    Open Energy Info (EERE)

    to establish an in situ laboratory to investigate the potential for geothermal energy production. Classical 2-D smooth inversion of the MT data, recorded along two profiles,...

  7. High Gradient Inverse Free Electron Laser (IFEL) Accelerator

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

    Gradient High energy gain Inverse Free Electron Laser P. Musumeci UCLA Department of Physics and Astronomy On Behalf of the RUBICON collaboration ATF user meeting, BNL, October 6...

  8. Three-Dimensional Inversion of Magnetotelluric Data on a PC,...

    Open Energy Info (EERE)

    Coso Geothermal Field Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Three-Dimensional Inversion of Magnetotelluric Data on a PC,...

  9. Joint with application in electrochemical devices

    DOE Patents [OSTI]

    Weil, K Scott [Richland, WA; Hardy, John S [Richland, WA

    2010-09-14T23:59:59.000Z

    A joint for use in electrochemical devices, such as solid oxide fuel cells (SOFCs), oxygen separators, and hydrogen separators, that will maintain a hermetic seal at operating temperatures of greater than 600.degree. C., despite repeated thermal cycling excess of 600.degree. C. in a hostile operating environment where one side of the joint is continuously exposed to an oxidizing atmosphere and the other side is continuously exposed to a wet reducing gas. The joint is formed of a metal part, a ceramic part, and a flexible gasket. The flexible gasket is metal, but is thinner and more flexible than the metal part. As the joint is heated and cooled, the flexible gasket is configured to flex in response to changes in the relative size of the metal part and the ceramic part brought about by differences in the coefficient of thermal expansion of the metal part and the ceramic part, such that substantially all of the tension created by the differences in the expansion and contraction of the ceramic and metal parts is absorbed and dissipated by flexing the flexible gasket.

  10. Dashboards in Higher UMACRAO/WACRAO Joint

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    Dashboards in Higher Education UMACRAO/WACRAO Joint Conference November 1-3, 2006 Phil Hull charts, pie charts and gauges are usually set in a portal-like environment that is often role for Short Term Decision Making Transactional Current, Unit Record Level Data Used for Daily Operational

  11. The Trade and Climate Change Joint Agenda

    E-Print Network [OSTI]

    The Trade and Climate Change Joint Agenda CEPS Working Document No. 295/June 2008 Thomas L. Brewer Abstract Climate change, international trade, investment and technology transfer are all issues that have............................................................................ 6 3.2 Coverage of the Multilateral Climate and Trade Regimes

  12. Wave Propagation in Jointed Geologic Media

    SciTech Connect (OSTI)

    Antoun, T

    2009-12-17T23:59:59.000Z

    Predictive modeling capabilities for wave propagation in a jointed geologic media remain a modern day scientific frontier. In part this is due to a lack of comprehensive understanding of the complex physical processes associated with the transient response of geologic material, and in part it is due to numerical challenges that prohibit accurate representation of the heterogeneities that influence the material response. Constitutive models whose properties are determined from laboratory experiments on intact samples have been shown to over-predict the free field environment in large scale field experiments. Current methodologies for deriving in situ properties from laboratory measured properties are based on empirical equations derived for static geomechanical applications involving loads of lower intensity and much longer durations than those encountered in applications of interest involving wave propagation. These methodologies are not validated for dynamic applications, and they do not account for anisotropic behavior stemming from direcitonal effects associated with the orientation of joint sets in realistic geologies. Recent advances in modeling capabilities coupled with modern high performance computing platforms enable physics-based simulations of jointed geologic media with unprecedented details, offering a prospect for significant advances in the state of the art. This report provides a brief overview of these modern computational approaches, discusses their advantages and limitations, and attempts to formulate an integrated framework leading to the development of predictive modeling capabilities for wave propagation in jointed and fractured geologic materials.

  13. Jointly organised by HKU CIVIL ENGRG. DEPT.

    E-Print Network [OSTI]

    Tam, Vincent W. L.

    SEMINAR Jointly organised by and HKU CIVIL ENGRG. DEPT. Centre for Infrastructure and Construction Industry Development THE USE OF TRENCHLESS TECHNOLOGY FOR THE IMPROVEMENT OF URBAN HABITATS by Ian, vibration, and air pollution. The frustration this causes is aggravated by the knowledge that there often

  14. Wide temperature range seal for demountable joints

    DOE Patents [OSTI]

    Sixsmith, H.; Valenzuela, J.A.; Nutt, W.E.

    1991-07-23T23:59:59.000Z

    The present invention is directed to a seal for demountable joints operating over a wide temperature range down to liquid helium temperatures. The seal has anti-extrusion guards which prevent extrusion of the soft ductile sealant material, which may be indium or an alloy thereof. 6 figures.

  15. Wide temperature range seal for demountable joints

    DOE Patents [OSTI]

    Sixsmith, Herbert (Norwich, VT); Valenzuela, Javier A. (Grantham, NH); Nutt, William E. (Enfield, NH)

    1991-07-23T23:59:59.000Z

    The present invention is directed to a seal for demountable joints operating over a wide temperature range down to liquid helium temperatures. The seal has anti-extrusion guards which prevent extrusion of the soft ductile sealant material, which may be indium or an alloy thereof.

  16. Wild Hypersurfaces joint work with Andrew Crabbe

    E-Print Network [OSTI]

    Leuschke, Graham

    Wild Hypersurfaces joint work with Andrew Crabbe Graham J. Leuschke gjleusch@math.syr.edu Syracuse University Notre Dame, 6 Nov 2010 , Wild Hypersurfaces, Crabbe­Leuschke 1/14 #12;Outline Representation types in general Tame and Wild examples MCM modules over hypersurfaces Finite MCM type for hypersurfaces Tame MCM

  17. Andres Loh joint work with Ralf Hinze

    E-Print Network [OSTI]

    Löh, Andres

    Trinity Andres L¨oh joint work with Ralf Hinze Utrecht University January 11, 2008 #12;About me Ph), polytypic / datatype-generic programming, type systems (dependent types) Andres L¨oh Trinity 2 #12;What is Trinity? Trinity is a programming language designed by Ralf Hinze and me. It is called Trinity because

  18. Joint News Release ELEVENTH ITER NEGOTIATIONS MEETING

    E-Print Network [OSTI]

    of Science and Technology of China Department of International Co-operation Luo Delong luodl@mail.most.govJoint News Release ELEVENTH ITER NEGOTIATIONS MEETING CHENGDU , CHINA, 24OCTOBER 2005 Delegations from China, European Union, Japan, the Republic of Korea, the Russian Federation and the United States

  19. ankle joint complex: Topics by E-print Network

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

    then there exists A S(H)m Li, Chi-Kwong 458 READY FOR TODAY. PREPARING FOR TOMORROW. The Joint Operating Environment is intended to inform joint concept Mathematics Websites...

  20. aluminum aa2024 joints: Topics by E-print Network

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

    337 389 494 In 1977, 175 joint fishing ventures with the participation-215. In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations...

  1. ankle joint: Topics by E-print Network

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

    then there exists A S(H)m Li, Chi-Kwong 366 READY FOR TODAY. PREPARING FOR TOMORROW. The Joint Operating Environment is intended to inform joint concept Mathematics Websites...

  2. achieving joint benefits: Topics by E-print Network

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

    337 389 494 In 1977, 175 joint fishing ventures with the participation-215. In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations...

  3. ankle joint direkte: Topics by E-print Network

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

    then there exists A S(H)m Li, Chi-Kwong 375 READY FOR TODAY. PREPARING FOR TOMORROW. The Joint Operating Environment is intended to inform joint concept Mathematics Websites...

  4. alpha rotary joint: Topics by E-print Network

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

    337 389 494 In 1977, 175 joint fishing ventures with the participation-215. In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations...

  5. activities implemented jointly: Topics by E-print Network

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

    337 389 494 In 1977, 175 joint fishing ventures with the participation-215. In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations...

  6. acromioclavicular joint separations: Topics by E-print Network

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

    337 389 494 In 1977, 175 joint fishing ventures with the participation-215. In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations...

  7. artificial hip joints: Topics by E-print Network

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

    this could involve the use of additively Evans, Paul 2 COMPUTATIONAL MODELING OF HIP JOINT MECHANICS CiteSeer Summary: The hip joint is one of the largest weight bearing...

  8. Expansion Joint Concepts for High Temperature Insulation Systems

    E-Print Network [OSTI]

    Harrison, M. R.

    1980-01-01T23:59:59.000Z

    As high temperature steam and process piping expands with heat, joints begin to open between the insulation sections, resulting in increased energy loss and possible unsafe surface temperatures. Many different expansion joint designs are presently...

  9. Optimal Joint Preventive Maintenance and Production Policies* Xiaodong Yao

    E-Print Network [OSTI]

    Marcus, Steven I.

    Optimal Joint Preventive Maintenance and Production Policies* Xiaodong Yao SAS Institute Inc. Cary preventive maintenance (PM) and production policies for an unreliable production-inventory system in which to establish some additional structural properties. Keywords: optimal preventive maintenance, joint maintenance

  10. Variation in joint fluid composition and its effect on the tribology of replacement joint articulation

    E-Print Network [OSTI]

    Mazzucco, Daniel Clarke, 1976-

    2003-01-01T23:59:59.000Z

    Polyethylene wear is a significant clinical problem limiting the long-term survival of joint replacement prostheses, particularly in total hip arthroplasty (THA) and total knee arthroplasty (TKA). Although the tribology ...

  11. On Optimizing Joint Inversion of Constrained Geophysical Datasets Anibal Sosa1 Leticia Velazquez1;2, Aaron Velasco3,

    E-Print Network [OSTI]

    Ward, Karen

    of Texas at El Paso, El Paso, Texas 79968-0514, USA 3Department of Geological Sciences, The University) algorithm to characterize 1D earth structure using geophysical datasets with two different optimization

  12. Characterization of heterogeneous near-surface materials by joint 2D inversion of dc resistivity and seismic data

    E-Print Network [OSTI]

    Meju, Max

    multidimensional non- invasive dc resistivity and seismic refraction investigations of the near-surface have and seismic data Luis A. Gallardo1 and Max A. Meju Department of Environmental Science, Lancaster University-gradients of electrical resistivity and seismic velocity as constraints so as to investigate more precisely

  13. Joint Radial Inversion of Resistivity and Sonic Logs to Estimate In-Situ Petrophysical and Elastic Properties of Formations

    E-Print Network [OSTI]

    Torres-Verdín, Carlos

    in the frequency domain. Synthetic cases consider water-base mud filtrate invading a hydrocarbon-bearing sand-wellbore damage, resulting from drilling and mud-filtrate invasion, can substantially affect sonic and resistivity, with the formation model described by a radial variation of water and hydrocarbon saturations representative of mud

  14. Joint porosity depth trend estimation and lithology/fluid classification by Bayesian inversion Kjartan Rimstad and Henning Omre

    E-Print Network [OSTI]

    Eidsvik, Jo

    ,0 Sand,Shale,Sand,kc Sand,zc Sand] and the prior model of is p(). We assume that seismic AVO data. The ultimate goal of this study is to clas- sify lithology/fluid from sesimic AVO data using our stochastic Consider a geological model of a reservoir in one dimension, and the four classes oil-, gas- and brine

  15. Shear velocity model for the Kyrgyz Tien Shan from joint inversion of receiver function and surface wave data

    E-Print Network [OSTI]

    Gilligan, Amy; Roecker, Steven W.; Priestley, Keith F.; Nunn, Ceri

    2014-07-09T23:59:59.000Z

    frame based on the principal component of motion of the incident phase, in order to maximize the energy of the converted mode. Using the nomenclature of Farra & Vinnik (2000) and Vinnik (1977), for P receiver functions this is the (L, H, Q) frame, where... ; the asymmetry in our estimates suggests that sources of noise, partic- ularly in the 5–20 s band, are predominantly from the south. Given that the Arctic Ocean is covered with ice for portions of the year, it is not surprising that noise from the Indian Ocean...

  16. Joint inversion of surface waves and teleseismic body waves across the Tibetan collision zone: the fate of subducted Indian lithosphere

    E-Print Network [OSTI]

    Nunn, Ceri; Roecker, Steven W.; Priestley, Keith F.; Liang, Xiaofeng; Gilligan, Amy

    2014-09-01T23:59:59.000Z

    for traveltimes at shallow depths. 2 GEOTECTONIC SETT ING At the surface, the Tibetan plateau is a relatively uniform area of ?5 km elevation. Its formation involved numerous collisions, and several major sutures formed during the closure of the Tethys ocean (Fig... . Studies of Sn propagation indicate that Sn energy is more strongly attenuated in the northern plateau in comparison to the south (Ni & Barazangi 1983; McNamara et al. 1995). Barron & Priestley (2009) investigated the propagation of the Sn phase over a...

  17. Joint measurements of spin, operational locality and uncertainty

    E-Print Network [OSTI]

    Erika Andersson; Stephen M. Barnett; Alain Aspect

    2005-09-21T23:59:59.000Z

    Joint, or simultaneous, measurements of non-commuting observables are possible within quantum mechanics, if one accepts an increase in the variances of the jointly measured observables. In this paper, we discuss joint measurements of a spin 1/2 particle along any two directions. Starting from an operational locality principle, it is shown how to obtain a bound on how sharp the joint measurement can be. We give a direct interpretation of this bound in terms of an uncertainty relation.

  18. Microbial Genomics Data from the DOE Joint Genome Institute (JGI)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    As of March 2008, The Joint Genome Institute has released 296 Prokaryotic microbial sites, with 216 in finished status.

  19. SPIDERS Joint Capability Technology Demonstration Industry Day Presentations

    Broader source: Energy.gov [DOE]

    Presentations from the SPIDERS Joint Capability Technology Demonstration Industry Day, which occurred on April 22, 2014, at Fort Carson, Colorado.

  20. Potential inversion with subbarrier fusion data revisited

    E-Print Network [OSTI]

    K. Hagino; Y. Watanabe

    2007-06-18T23:59:59.000Z

    We invert experimental data for heavy-ion fusion reactions at energies well below the Coulomb barrier in order to directly determine the internucleus potential between the colliding nuclei. In contrast to the previous applications of the inversion formula, we explicitly take into account the effect of channel couplings on fusion reactions, by assuming that fusion cross sections at deep subbarrier energies are governed by the lowest barrier in the barrier distribution. We apply this procedure to the $^{16}$O +$^{144}$Sm and $^{16}$O +$^{208}$Pb reactions, and find that the inverted internucleus potential are much thicker than phenomenological potentials. A relation to the steep fall-off phenomenon of fusion cross sections recently found at deep subbarrier energies is also discussed.

  1. Supersymmetric inversion of effective-range expansions

    E-Print Network [OSTI]

    Bikashkali Midya; Jérémie Evrard; Sylvain Abramowicz; O. L. Ramírez Suárez; Jean-Marc Sparenberg

    2015-05-26T23:59:59.000Z

    A complete and consistent inversion technique is proposed to derive an accurate interaction potential from an effective-range function for a given partial wave in the neutral case. First, the effective-range function is Taylor or Pad\\'e expanded, which allows high precision fitting of the experimental scattering phase shifts with a minimal number of parameters on a large energy range. Second, the corresponding poles of the scattering matrix are extracted in the complex wave-number plane. Third, the interaction potential is constructed with supersymmetric transformations of the radial Schr\\"odinger equation. As an illustration, the method is applied to the experimental phase shifts of the neutron-proton elastic scattering in the $^1S_0$ and $^1D_2$ channels on the $[0-350]$ MeV laboratory energy interval.

  2. Supersymmetric inversion of effective-range expansions

    E-Print Network [OSTI]

    Midya, Bikashkali; Abramowicz, Sylvain; Suárez, O L Ramírez; Sparenberg, Jean-Marc

    2015-01-01T23:59:59.000Z

    A complete and consistent inversion technique is proposed to derive an accurate interaction potential from an effective-range function for a given partial wave in the neutral case. First, the effective-range function is Taylor or Pad\\'e expanded, which allows high precision fitting of the experimental scattering phase shifts with a minimal number of parameters on a large energy range. Second, the corresponding poles of the scattering matrix are extracted in the complex wave-number plane. Third, the interaction potential is constructed with supersymmetric transformations of the radial Schr\\"odinger equation. As an illustration, the method is applied to the experimental phase shifts of the neutron-proton elastic scattering in the $^1S_0$ and $^1D_2$ channels on the $[0-350]$ MeV laboratory energy interval.

  3. Supersymmetric inversion of effective-range expansions

    E-Print Network [OSTI]

    Bikashkali Midya; Jérémie Evrard; Sylvain Abramowicz; O. L. Ramírez Suárez; Jean-Marc Sparenberg

    2015-01-16T23:59:59.000Z

    A complete and consistent inversion technique is proposed to derive an accurate interaction potential from an effective-range function for a given partial wave in the neutral case. First, the effective-range function is Taylor or Pad\\'e expanded, which allows high precision fitting of the experimental scattering phase shifts with a minimal number of parameters on a large energy range. Second, the corresponding poles of the scattering matrix are extracted in the complex wave-number plane. Third, the interaction potential is constructed with supersymmetric transformations of the radial Schr\\"odinger equation. As an illustration, the method is applied to the experimental phase shifts of the neutron-proton elastic scattering in the $^1S_0$ and $^1D_2$ channels on the $[0-350]$ MeV laboratory energy interval.

  4. Inverse Vernier Effects in Coupled Lasers

    E-Print Network [OSTI]

    Ge, Li

    2015-01-01T23:59:59.000Z

    In this report we study the Vernier effect in coupled laser systems consisting of two cavities. We show that depending on the nature of their coupling, not only can the "supermodes" formed at the overlapping resonances of the coupled cavities have the lowest thresholds and lase first as previously suggested, leading to a manifestation of the typical Vernier effect now in an active system; these supermodes can also have increased thresholds and are hence suppressed, which can be viewed as an inverse Vernier effect. We attribute this effect to detuning-dependent Q-spoiling, and it can lead to an increased free spectrum range and possibly single-mode lasing, which may explain the experimental findings of several previous work. We illustrate this effect using two coupled micro-ring cavities and a micro-ring cavity coupled to a slab cavity, and we discuss its relation to the existence of exceptional points in coupled lasers.

  5. Combined Borehole Seismic and Electromagnetic Inversion For High-Resolution Petrophysical Assessment Of Hydocarbon Reservoirs

    SciTech Connect (OSTI)

    Carlos Torres-Verdin; G. Michael Hoversten; Ki Ha Lee; Gregory Newman; Kurt Nihei

    2008-12-31T23:59:59.000Z

    This report summarizes the work performed between January 2005 and December 2007, under DOE research contract DE-FC26-04NT15507. The project is was performed by the Center for Petroleum and Geosystems Engineering of The University of Texas at Austin and Lawrence Berkeley National Laboratory under the auspices of the National Energy Technology Office (NETL) and the Strategic Center for Natural Gas and Oil (SCNGO). During the three-year project, we developed new methods to combine borehole sonic and electromagnetic (EM) measurements for the improved assessment of elastic and petrophysical properties of rock formations penetrated by a well. Sonic measurements consisted of full waveform acoustic amplitudes acquired with monopole and dipole sources, whereas EM measurements consisted of frequency-domain voltages acquired with multi-coil induction systems. The combination of sonic and EM measurements permitted the joint estimation of elastic and petrophysical properties in the presence of mud-filtrate invasion. It was conclusively shown that the combined interpretation of sonic and EM measurements reduced non-uniqueness in the estimation of elastic and petrophysical properties and improved the spatial resolution of the estimations compared to estimations yielded separately from the two types of measurements. Moreover, this approach enabled the assessment of dynamic petrophysical properties such as permeability, as it incorporated the physics of mud-filtrate invasion in the interpretation of the measurements. The first part of the project considered the development of fast and reliable numerical algorithms to simulate borehole sonic waveforms in 2D, 3D, and radial 1D media. Such algorithms were subsequently used in the quantitative estimation of elastic properties jointly from borehole sonic and EM measurements. In the second part of the project we developed a new algorithm to estimate water saturation, porosity, and dry-rock elastic moduli jointly from borehole sonic and EM measurements. This algorithm assumed radial 1D variations of fluid saturation due to mud-filtrate invasion. Subsequently, we adapted the estimation method to interpret borehole field measurements acquired in both a shaly-sand sedimentary sequence and a tight-gas sandstone formation. In the two cases, we simulated the process of mud-filtrate invasion and concomitantly honored sonic and EM measurements. We produced reliable estimates of permeability and dry-rock moduli that were successfully validated with rock-core measurements. Finally, we introduced a new stochastic inversion procedure to estimate elastic, electrical, and petrophysical properties of layered media jointly from waveform sonic and frequency-domain EM measurements. The procedure was based on Bayesian statistical inversion and delivered estimates of uncertainty under various forms of a-priori information about the unknown properties. Tests on realistic synthetic models confirmed the reliability of this procedure to estimate elastic and petrophysical properties jointly from sonic and EM measurements. Several extended abstracts and conference presentations stemmed from this project, including 2 SEG extended abstracts, 1 SPE extended abstract, and 2 SPWLA extended abstracts. Some of these extended abstracts have been submitted for publication in peer-reviewed journals.

  6. Joint Traffic Blocking and Routing under Network Failures and Maintenances

    E-Print Network [OSTI]

    Liu, Yong

    Joint Traffic Blocking and Routing under Network Failures and Maintenances Chao Liang ECE Dept paths. Therefore, it is important to design ingress traffic blocking and routing jointly to achieve a good balance between the two factors. Working towards this goal, we formulate a joint ingress blocking

  7. Joints and Veins Earth Structure (2nd Edition), 2004

    E-Print Network [OSTI]

    ed) 69/12/2010 Ideal joint structure (a) Block diagram showing the various components of an ideal beds, shorter joints, smaller shadows Thus, closer spacing (a) Block diagram illustrating stress shadowJoints and Veins Earth Structure (2nd Edition), 2004 W.W. Norton & Co, New York Slide show by Ben

  8. Guide to Dowel LoadTransfer Systems for Jointed Concrete

    E-Print Network [OSTI]

    Guide to Dowel LoadTransfer Systems for Jointed Concrete Roadway Pavements TECH BRIEF SEPTEMBER 2011 #12;#12;GUIDE TO DOWEL LOAD TRANSFER SYSTEMS FOR JOINTED CONCRETE ROADWAY PAVEMENTS i Technical and Subtitle Guide to Dowel Load Transfer Systems for Jointed Concrete Roadway Pavements 5. Report Date

  9. Look at this: the neural correlates of initiating and responding to bids for joint attention

    E-Print Network [OSTI]

    Redcay, Elizabeth

    When engaging in joint attention, one person directs another person's attention to an object (Initiating Joint Attention, IJA), and the second person's attention follows (Responding to Joint Attention, RJA). As such, joint ...

  10. Optical Aharonov-Bohm effect: an inverse hyperbolic problems approach

    E-Print Network [OSTI]

    Gregory Eskin

    2007-10-18T23:59:59.000Z

    We describe the general setting for the optical Aharonov-Bohm effect based on the inverse problem of the identification of the coefficients of the governing hyperbolic equation by the boundary measurements. We interpret the inverse problem result as a possibility in principle to detect the optical Aharonov-Bohm effect by the boundary measurements.

  11. Constrained Inverse Volume Rendering for Planetary Nebulae Marcus Magnor

    E-Print Network [OSTI]

    Utah, University of

    Inverse Volume Rendering I.4.m [Image Processing and Computer Vision]: Miscellaneous--Volumetric Modeling that we are observing 2D projections of 3D volumes of glowing gas, the actual spatial struc- ture of PNeConstrained Inverse Volume Rendering for Planetary Nebulae Marcus Magnor MPI Informatik, Germany

  12. Anomalous Phase Inversion in Polymer Blends Prepared by Cryogenic Mechanical

    E-Print Network [OSTI]

    , as well as interpenetrating and bicontinu- ous networks.7,8 Phase inversion occurs when the mi- norityAnomalous Phase Inversion in Polymer Blends Prepared by Cryogenic Mechanical Alloying Archie P strategies for producing highly dis- persed multicomponent polymer blends. By their very nature

  13. Wavelet based inversion of gravity data Fabio Boschetti

    E-Print Network [OSTI]

    Boschetti, Fabio

    1 Wavelet based inversion of gravity data Fabio Boschetti CSIRO Exploration & Mining and Australian Running Heading: Wavelet based inversion of gravity data #12;2 ABSTRACT The Green's function of the Poisson equation, and its spatial derivatives, lead to a family of wavelets specifically tailored

  14. Inverse Modelling in Geology by Interactive Evolutionary Computation

    E-Print Network [OSTI]

    Boschetti, Fabio

    Inverse Modelling in Geology by Interactive Evolutionary Computation Chris Wijns a,b,, Fabio of geological processes, in the absence of established numerical criteria to act as inversion targets, requires evolutionary computation provides for the inclusion of qualitative geological expertise within a rigorous

  15. Inversed Temperature Dependence Aware Clock Skew Scheduling for Sequential

    E-Print Network [OSTI]

    Kuzmanovic, Aleksandar

    Inversed Temperature Dependence Aware Clock Skew Scheduling for Sequential Circuits Jieyi Long}@eecs.northwestern.edu Abstract -- We present an Inversed Temperature Dependence (ITD) aware clock skew scheduling framework, we propose an algorithm for synergistic temperature aware clock skew scheduling and dual

  16. Hyperparameter estimation for uncertainty quantification in mesoscale carbon dioxide inversions

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Hyperparameter estimation for uncertainty quantification in mesoscale carbon dioxide inversions-validation (GCV) and x2 test are compared for the first time under a realistic setting in a mesoscale CO2 estimation, uncertainty quantification, mesoscale carbon dioxide inversions 1. Introduction The atmosphere

  17. THE FUKUSHIMA INVERSE PROBLEM Marta Martinez-Camara, Ivan Dokmanic,

    E-Print Network [OSTI]

    Vetterli, Martin

    THE FUKUSHIMA INVERSE PROBLEM Marta Martinez-Camara, Ivan Dokmani´c, Juri Ranieri, Robin Scheibler material was released from Fukushima in March 2011 is crucial to understand the scope of the consequences regular- ization that solves the Fukushima inverse problem blindly. Together with the atmospheric

  18. Lithology-Fluid Inversion based on Prestack Seismic Data

    E-Print Network [OSTI]

    Eidsvik, Jo

    Lithology-Fluid Inversion based on Prestack Seismic Data Marit Ulvmoen Summary The focus of the study is on lithology-fluid inversion from prestack seismic data. The target zone is a 3D reservoir model. The likelihood model relates the lithology-fluid classes to elastic variables and the seismic

  19. Computationally Efficient Regularized Inversion for Highly Parameterized MODFLOW Models

    E-Print Network [OSTI]

    Barrash, Warren

    . INTRODUCTION The inverse problem in groundwater modeling is generally ill-posed and non-unique. The typical geological heterogeneity has not been possible in common groundwater modeling practice. The principal reasons-Marquardt methods, and (3) lack of experience within the groundwater modeling community with regularized inversion

  20. Adhesive joint and composites modeling in SIERRA.

    SciTech Connect (OSTI)

    Ohashi, Yuki; Brown, Arthur A.; Hammerand, Daniel Carl; Adolf, Douglas Brian; Chambers, Robert S.; Foulk, James W., III (.,; )

    2005-11-01T23:59:59.000Z

    Polymers and fiber-reinforced polymer matrix composites play an important role in many Defense Program applications. Recently an advanced nonlinear viscoelastic model for polymers has been developed and incorporated into ADAGIO, Sandia's SIERRA-based quasi-static analysis code. Standard linear elastic shell and continuum models for fiber-reinforced polymer-matrix composites have also been added to ADAGIO. This report details the use of these models for advanced adhesive joint and composites simulations carried out as part of an Advanced Simulation and Computing Advanced Deployment (ASC AD) project. More specifically, the thermo-mechanical response of an adhesive joint when loaded during repeated thermal cycling is simulated, the response of some composite rings under internal pressurization is calculated, and the performance of a composite container subjected to internal pressurization, thermal loading, and distributed mechanical loading is determined. Finally, general comparisons between the continuum and shell element approaches for modeling composites using ADAGIO are given.

  1. Structural Evolution and Alignment of Cylinder-Forming PS-b-PEP Thin Films in Confinement Studied by Time-Lapse Atomic Force Microscopy

    E-Print Network [OSTI]

    Sibener, Steven

    ultimately lead to the essentially perfect alignment of cylindrical microdomains. INTRODUCTION The generation in trough 30 cylinders on crest 1 µm Figure 1. AFM image showing macroscopic alignment of in-plane cylindrical copolymer microdomains. In the thin film region, copolymers align inside nanochannels, whereas

  2. Quantitative analysis of axon elongation : a novel application of stochastic modeling techniques to long-term, high-resolution time-lapse microscopy of cortical axons

    E-Print Network [OSTI]

    Sanjana, Neville Espi

    2010-01-01T23:59:59.000Z

    Axons exhibit a rich variety of behaviors, such as elongation, turning, branching, and fasciculation, all in service of the complex goal of wiring up the brain. In order to quantify these behaviors, I have developed a ...

  3. A field comparison of Fresnel zone and ray-based GPR attenuation-difference tomography for time-lapse imaging of

    E-Print Network [OSTI]

    Barrash, Warren

    A field comparison of Fresnel zone and ray-based GPR attenuation-difference tomography for time the medium. These sensitivities occupy the first Fresnel zone, account for the finite frequency nature

  4. Estimate of shear wave velocity, and its time-lapse change, from seismic data recorded at the SMNH01 station of KiK-net using seismic interferometry

    E-Print Network [OSTI]

    Snieder, Roel

    , Golden, Colorado, USA d Instituto Mexicano del Petro´leo, Eje Central La´zaro Ca´rdenas Norte 152´z-Alema´n d a Centro Interdisciplinario de Investigacio´n para el Desarrollo Integral Regional, Instituto Polite´cnico Nacional, Hornos 1003, Santa Cruz Xoxocotla´n, Oaxaca, Me´xico b Instituto de Ingenieri

  5. Pipeline safety joint eliminates need for divers

    SciTech Connect (OSTI)

    Not Available

    1983-04-01T23:59:59.000Z

    The Sea-Hook coupling is a diverless pressure-compensated pipeline safety joint designed to protect the pipe from damage by excessive physical loads. The coupling provides a predetermined weak point in the line that will cause a controlled separation when the line is exposed to strong wave action or dragging anchors. Moreover, it offers prepressurized remote lockout protection, metal seal integrity, no hand-up separation, enclosed bolting, optimal manual lockout, and no springs or shear rings.

  6. Low Distortion Welded Joints for NCSX

    SciTech Connect (OSTI)

    M. Denault, M Viola, W. England

    2009-02-19T23:59:59.000Z

    The National Compact Stellarator Experiment (NCSX) required precise positioning of the field coils in order to generate suitable magnetic fields. A set of three modular field coils were assembled to form the Half Field-Period Assemblies (HPA). Final assembly of the HPA required a welded shear plate to join individual coils in the nose region due to the geometric limitations and the strength constraints. Each of the modular coil windings was wound on a stainless steel alloy (Stellalloy) casting. The alloy is similar to austenitic 316 stainless steel. During the initial welding trials, severe distortion, of approximately 1/16", was observed in the joint caused by weld shrinkage. The distortion was well outside the requirements of the design. Solutions were attempted through several simultaneous routes. The joint design was modified, welding processes were changed, and specialized heat reduction techniques were utilized. A final joint design was selected to reduce the amount of weld material needed to be deposited, while maintaining adequate penetration and strength. Several welding processes and techniques using Miller Axcess equipment were utilized that significantly reduced heat input. The final assembly of the HPA was successful. Distortion was controlled to 0.012", well within the acceptable design tolerance range of 0.020" over a 3.5 foot length.

  7. Adaptive dynamic inversion of nonlinear systems subjected to control saturation constraints

    E-Print Network [OSTI]

    Tandale, Monish Deepak

    2007-09-17T23:59:59.000Z

    The adaptive dynamic inversion control methodology uses dynamic inversion to calculate the control, and adaptation to compensate for the errors in the inversion due to model uncertainties. Traditionally, adaptive control assumes full authority...

  8. Inversion of TEM sounding data using the steepest descent and the conjugate gradients methods

    E-Print Network [OSTI]

    Alsabti, Abdallah S

    2001-01-01T23:59:59.000Z

    In this study, the inversion of TEM sounding is investigated. I solved the over-determined and the under-determined inversion problems using the steepest descent and the conjugate gradients methods. The study depends on results from the inversion...

  9. Comparison of Joint Modeling Approaches Including Eulerian Sliding Interfaces

    SciTech Connect (OSTI)

    Lomov, I; Antoun, T; Vorobiev, O

    2009-12-16T23:59:59.000Z

    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.

  10. Sunspot umbra atmosphere from full Stokes inversion

    E-Print Network [OSTI]

    Wenzel, R; Fluri, D M; Arnaud, J; Sainz-Dalda, A

    2010-01-01T23:59:59.000Z

    Sunspots are prominent manifestations of the solar cycle and provide key constraints for understanding its operation. Also, knowing internal structure of sunspots allows us to gain insights on the energy transport in strong magnetic fields and, thus, on the processes inside the convection zone, where solar magnetic fields are generated and amplified before emerging at the surface on various scales, even during solar minima. In this paper, we present results of a spectropolarimetric analysis of a sunspot observed during the declining phase of the solar cycle 23. By inversion of full Stokes spectra observed in several spectral regions in the optical at the THEMIS facility we infer the height dependence of physical quantities such as the temperature and the magnetic field strength for different sunspot regions. The simultaneous use of atomic (Fe{\\sc i} 5250.2 and 5250.6 \\AA) and highly temperature sensitive molecular (TiO 7055 \\AA and MgH 5200 \\AA) lines allow us to improve a model of the sunspot umbra.

  11. Moho topography beneath the Corinth Rift area (Greece) from inversion of gravity data

    E-Print Network [OSTI]

    Demouchy, Sylvie

    Moho topography beneath the Corinth Rift area (Greece) from inversion of gravity data C. Tiberi,1 to Miocene lithospheric instabilities. Key words: boudinage, continental rifts, gravity inversion, Greece

  12. Inverse Cascade Regime in Shell Models of 2-Dimensional Turbulence

    E-Print Network [OSTI]

    Thomas Gilbert; Victor S. L'vov; Anna Pomyalov; Itamar Procaccia

    2002-01-13T23:59:59.000Z

    We consider shell models that display an inverse energy cascade similar to 2-dimensional turbulence (together with a direct cascade of an enstrophy-like invariant). Previous attempts to construct such models ended negatively, stating that shell models give rise to a "quasi-equilibrium" situation with equipartition of the energy among the shells. We show analytically that the quasi-equilibrium state predicts its own disappearance upon changing the model parameters in favor of the establishment of an inverse cascade regime with K41 scaling. The latter regime is found where predicted, offering a useful model to study inverse cascades.

  13. Three-dimensional geologic structures from inversion of gravity anomalies

    E-Print Network [OSTI]

    Hinson, Charles Alvin

    1976-01-01T23:59:59.000Z

    . Parameters used were: Zo=7 km, R=l gm/cm , fr=0. 09 km-', fz=0. 125 km iterations=6 and final rms difference was 7. 6 10-4 km. . 42 12 Inversion Model 1. Parameters used were p = 0. 1 gm/cms, zo = 5. 4 km, f& = 0. 045 and fz = 0. 095. Contours... are in kilometers relative to sea level 56 13 Inversion Model 2. Parameters used were p = 0. 1 gm/cm zo = 5. 4 km, fq = 0. 001 and fz = 0. 002. Contours are in kilometers relative to sea level 58 14 Gravity difference between the anomaly produced by Inversion...

  14. Equivalent Continuum Modeling for Shock Wave Propagation in Jointed Media

    SciTech Connect (OSTI)

    Vorobiev, O; Antoun, T

    2009-12-11T23:59:59.000Z

    This study presents discrete and continuum simulations of shock wave propagating through jointed media. The simulations were performed using the Lagrangian hydrocode GEODYN-L with joints treated explicitly using an advanced contact algorithm. They studied both isotropic and anisotropic joint representations. For an isotropically jointed geologic medium, the results show that the properties of the joints can be combined with the properties of the intact rock to develop an equivalent continuum model suitable for analyzing wave propagation through the jointed medium. For an anisotropically jointed geologic medium, they found it difficult to develop an equivalent continuum (EC) model that matches the response derived from mesoscopic simulation. They also performed simulations of wave propagation through jointed media. Two appraoches are suggested for modeling the rock mass. In one approach, jointed are modeled explicitly in a Lagrangian framework with appropriate contact algorithms used to track motion along the interfaces. In the other approach, the effect of joints is taken into account using a constitutive model derived from mesoscopic simulations.

  15. Joint electric power alternatives study. Appendix G. Joint parallel nuclear alternatives study for Russia. Final report

    SciTech Connect (OSTI)

    NONE

    1995-06-01T23:59:59.000Z

    The Joint Parallel Nuclear Alternatives Study for Russia (JPNAS) is a parallel study to the Joint Electric Power Alternatives Study (JEPAS). The JPNAS assessed the costs of enhancing the safety level of Russian nuclear power plants (NPPs), decommissioning of RBMK-1000 and first generation VVER-440 units, completion of NPP construction, NPP repowering into fossil fuel plants, and construction of new generation NPPs. In the framework of the JEPAS, the JPNAS provides data on the nuclear sector which is needed to formulate an integrated resources plan and schedule for investments for the development of Russia`s power sector.

  16. Application of robust and inverse optimization in transportation

    E-Print Network [OSTI]

    Nguyen, Thai Dung

    2010-01-01T23:59:59.000Z

    We study the use of inverse and robust optimization to address two problems in transportation: finding the travel times and designing a transportation network. We assume that users choose the route selfishly and the flow ...

  17. Mesh Puppetry: Cascading Optimization of Mesh Deformation with Inverse Kinematics

    E-Print Network [OSTI]

    Desbrun, Mathieu

    approach builds upon traditional rigging by optimizing skeleton position and vertex weights. Keywords: Mesh deformation, nonlinear optimization, inverse kinematics, geometry processing. 1 Introduction. To allow for more global and complex deforma- tion, many authors proposed to cast mesh deformation

  18. Engineering the initial state in broadband population inversion

    E-Print Network [OSTI]

    Bo Y. Chang; Sheokmin Shin; Ignacio R. Sola

    2015-03-03T23:59:59.000Z

    Quantum systems with sublevel structures prevent full population inversion from one manifold of sublevels to the other using strong ultrafast resonant pulses. In this work we explain the mechanism by which this population transfer is blocked. We then develop a novel concept of geometric control, assuming full or partial coherent manipulation within the manifolds and show that by preparing specific coherent superpositions in the initial manifold, full population inversion or full population blockade, {\\it i.e} laser-induced transparency, can be achieved. In particular, by parallel population transfer we show how population inversion between the manifolds can be obtained with minimal pulse area. As the number of sublevels increases, population inversion can overcome the pulse area theorem at the expense of full control over the initial manifold of sublevels.

  19. Nonlinear Adaptive Dynamic Inversion Control for Hypersonic Vehicles

    E-Print Network [OSTI]

    Rollins, Elizabeth

    2013-09-03T23:59:59.000Z

    -of-attack and sideslip angle. To prevent undesirable inlet unstart events, the nonlinear adaptive dynamic inversion control architecture is given the ability to enforce state constraints. Because several phenomena can cause inlet unstarts, the control architecture also...

  20. LINEARIZING NON-LINEAR INVERSE PROBLEMS AND AN ...

    E-Print Network [OSTI]

    to show uniqueness and Hölder stability for the inverse backscattering ...... that if we replace uT by u on the r.h.s. above, we get the “distorted harmonic wave”.

  1. Microsoft PowerPoint - High Gradient Inverse Free Electron Laser...

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

    Hi h G di t Hi h i High Gradient High energy gain Inverse Free Electron Laser at BNL P. Musumeci UCLA Department of Physics and Astronomy ATF user meeting April 2-3 2009 Outline...

  2. Strategies for Spectral Profile Inversion using Artificial Neural Networks

    E-Print Network [OSTI]

    H. Socas-Navarro

    2004-10-23T23:59:59.000Z

    This paper explores three different strategies for the inversion of spectral lines (and their Stokes profiles) using artificial neural networks. It is shown that a straightforward approach in which the network is trained with synthetic spectra from a simplified model leads to considerable errors in the inversion of real observations. This problem can be overcome in at least two different ways that are studied here in detail. The first method makes use of an additional pre-processing auto-associative neural network to project the observed profile into the theoretical model subspace. The second method considers a suitable regularization of the neural network used for the inversion. These new techniques are shown to be robust and reliable when applied to the inversion of both synthetic and observed data, with errors typically below $\\sim$100 G.

  3. Modeling and inversion of self-potential data

    E-Print Network [OSTI]

    Minsley, Burke J

    2007-01-01T23:59:59.000Z

    This dissertation presents data processing techniques relevant to the acquisition, modeling, and inversion of self-potential data. The primary goal is to facilitate the interpretation of self-potentials in terms of the ...

  4. The Focused Inverse Method for Linear Logic Kaustuv Chaudhuri

    E-Print Network [OSTI]

    Chaudhuri, Kaustuv

    The Focused Inverse Method for Linear Logic Kaustuv Chaudhuri CMU-CS-06-162 December 4, 2006 Mellon University, or any other entity. Copyright c 2006 Kaustuv Chaudhuri #12;Abstract Linear logic

  5. Inverse Optimization: An Application to the Capacitated Plant Location Problem

    E-Print Network [OSTI]

    Bitran, Gabriel R.

    Inverse optimization refers to the fact that each time a Lagrangean derived from a given mathematical programming problem is solved, it produces an optimal solution to some problem with a different right hand side. This ...

  6. Tests of the Gravitational Inverse-Square Law

    E-Print Network [OSTI]

    E. G. Adelberger; B. R. Heckel; A. E. Nelson

    2003-07-22T23:59:59.000Z

    We review recent experimental tests of the gravitational inverse-square law and the wide variety of theoretical considerations that suggest the law may break down in experimentally accessible regions.

  7. COLLOQUIUM: Seismic Imaging and Inversion Based on Spectral-Element...

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

    February 6, 2013, 4:15pm to 5:30pm Colloquia MBG Auditorium COLLOQUIUM: Seismic Imaging and Inversion Based on Spectral-Element and Adjoint Methods Professor Jeroen Tromp Princeton...

  8. DOE-EERC jointly sponsored research program

    SciTech Connect (OSTI)

    Hendrikson, J.G.; Sondreal, E.A.

    1999-09-01T23:59:59.000Z

    U.S. Department of Energy (DOE) Cooperative Agreement DE-FC21-93MC30098 funded through the Office of Fossil Energy and administered at the Federal Energy Technology Center (FETC) supported the performance of a Jointly Sponsored Research Program (JSRP) at the Energy and Environmental Research Center (EERC) with a minimum 50% nonfederal cost share to assist industry in commercializing and effectively applying efficient, nonpolluting energy technologies that can compete effectively in meeting market demands for clean fuels, chemical feedstocks, and electricity in the 21st century. The objective of the JSRP was to advance the deployment of advanced technologies for improving energy efficiency and environmental performance through jointly sponsored research on topics that would not be adequately addressed by the private sector alone. Examples of such topics include the barriers to hot-gas cleaning impeding the deployment of high-efficiency power systems and the search for practical means for sequestering CO{sub 2} generated by fossil fuel combustion. The selection of particular research projects was guided by a combination of DOE priorities and market needs, as provided by the requirement for joint venture funding approved both by DOE and the private sector sponsor. The research addressed many different energy resource and related environmental problems, with emphasis directed toward the EERC's historic lead mission in low-rank coals (LRCs), which represent approximately half of the U.S. coal resources in the conterminous states, much larger potential resources in Alaska, and a major part of the energy base in the former U.S.S.R., East Central Europe, and the Pacific Rim. The Base and JSRP agreements were tailored to the growing awareness of critical environmental issues, including water supply and quality, air toxics (e.g., mercury), fine respirable particulate matter (PM{sub 2.5}), and the goal of zero net CO{sub 2} emissions.

  9. Scaling and Inverse Scaling in Anisotropic Bootstrap percolation

    E-Print Network [OSTI]

    Aernout C. D. van Enter

    2015-02-03T23:59:59.000Z

    In bootstrap percolation it is known that the critical percolation threshold tends to converge slowly to zero with increasing system size, or, inversely, the critical size diverges fast when the percolation probability goes to zero. To obtain higher-order terms (that is, sharp and sharper thresholds) for the percolation threshold in general is a hard question. In the case of two-dimensional anisotropic models, sometimes correction terms can be obtained from inversion in a relatively simple manner.

  10. Joint Center for Energy Storage Research

    SciTech Connect (OSTI)

    Eric Isaacs

    2012-11-30T23:59:59.000Z

    The Joint Center for Energy Storage Research (JCESR) is a major public-private research partnership that integrates U.S. Department of Energy national laboratories, major research universities and leading industrial companies to overcome critical scientific challenges and technical barriers, leading to the creation of breakthrough energy storage technologies. JCESR, centered at Argonne National Laboratory, outside of Chicago, consolidates decades of basic research experience that forms the foundation of innovative advanced battery technologies. The partnership has access to some of the world's leading battery researchers as well as scientific research facilities that are needed to develop energy storage materials that will revolutionize the way the United States and the world use energy.

  11. Design and analysis of hybrid tubular joints 

    E-Print Network [OSTI]

    Stepanian, Christopher John

    1993-01-01T23:59:59.000Z

    composite tube. . Figure 5: a)Patent 4941692 b)Patent 4921283 Figure 6: a)Patent 5028081 b)Patent 4834932 Figure 7: a)Patent 4830409 b)Patent 4755406 Figure 8: a)Patent 4865356 b)Patent 4314718 Figure 9: a)Patent 4236386 b)Patent 4187135 Figure 10: a)Patent... and Analysis of Hybrid Tubular Joints. (December 1993) Christopher John Stepanian, B. S. , Rensselaer Polytechnic Institute Co-Chairs of Advisory Committee: Dr. John Whitcomb Dr. Robert Randall The offshore oil industry is in the midst of an expansion phase...

  12. JIBS | Joint Institute for Biological Sciences | ORNL

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12 Investigation PeerNOON 2004 February 12, 2004JGIPolarJoint

  13. Joint Implementation Network Feed | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf Kilauea Volcano, Hawaii | Wind FarmJeffersonJiminyJoint Implementation

  14. Reasonable conditions for joint probabilities of non-commuting observables

    E-Print Network [OSTI]

    Holger F. Hofmann

    2014-04-25T23:59:59.000Z

    In the operator formalism of quantum mechanics, the density operator describes the complete statistics of a quantum state in terms of d^2 independent elements, where d is the number of possible outcomes for a precise measurement of an observable. In principle, it is therefore possible to express the density operator by a joint probability of two observables that cannot actually be measured jointly because they do not have any common eigenstates. However, such joint probabilities do not refer to an actual measurement outcome, so their definition cannot be based on a set of possible events. Here, I consider the criteria that could specify a unique mathematical form of joint probabilities in the quantum formalism. It is shown that a reasonable set of conditions results in the definition of joint probabilities by ordered products of the corresponding projection operators. It is pointed out that this joint probability corresponds to the quasi probabilities that have recently been observed experimentally in weak measurements.

  15. Maps and inverse maps in open quantum dynamics

    E-Print Network [OSTI]

    Thomas F. Jordan

    2008-07-08T23:59:59.000Z

    Two kinds of maps that describe evolution of states of a subsystem coming from dynamics described by a unitary operator for a larger system, maps defined for fixed mean values and maps defined for fixed correlations, are found to be quite different for the same unitary dynamics in the same situation in the larger system. An affine form is used for both kinds of maps to find necessary and sufficient conditions for inverse maps. All the different maps with the same homogeneous part in their affine forms have inverses if and only if the homogeneous part does. Some of these maps are completely positive; others are not, but the homogeneous part is always completely positive. The conditions for an inverse are the same for maps that are not completely positive as for maps that are. For maps defined for fixed mean values, the homogeneous part depends only on the unitary operator for the dynamics of the larger system, not on any state or mean values or correlations. Necessary and sufficient conditions for an inverse are stated several different ways: in terms of the maps of matrices, basis matrices, density matrices, or mean values. The inverse maps are generally not tied to the dynamics the way the maps forward are. A trace-preserving completely positive map that is unital can not have an inverse that is obtained from any dynamics described by any unitary operator for any states of a larger system.

  16. Development of the bus joint for the ITER Central Solenoid

    SciTech Connect (OSTI)

    Martovetsky, Nicolai N [ORNL] [ORNL; Irick, David Kim [ORNL] [ORNL; Kenney, Steven J [ORNL] [ORNL

    2013-01-01T23:59:59.000Z

    The terminations of the Central Solenoid (CS) modules are connected to the bus extensions by joints located outside the CS in the gap between the CS and Torodial Field (TF) assemblies. These joints have very strict space limitations. Low resistance is a common requirement for all ITER joints. In addition, the CS bus joints will experience and must be designed to withstand significant variation in the magnetic field of several tenths of a Tesla per second during initiation of plasma. The joint resistance is specified to be less than 4 nOhm. The joints also have to be soldered in the field and designed with the possibility to be installed and dismantled in order to allow cold testing in the cold test facility. We have developed coaxial joints that meet these requirements and have demonstrated the feasibility to fabricate and assemble them in the vertical configuration. We introduced a coupling cylinder with superconducting strands soldered to the surface of the cable that can be installed in the ITER assembly hall and at the Cold Test Facility. This cylinder serves as a transition area between the CS module and the bus extension. We made two racetrack samples and tested four bus joints in our Joint Test Apparatus. Resistance of the bus joints was measured by a decay method and by a microvoltmeter; the value of the current was measured by the Hall probes. This measurement method was verified in the previous tests. The resistance of the joints varied insignificantly from 1.5 to 2 nOhm. One of the challenges associated with a soldered joint is the inability to use corrosive chemicals that are difficult to clean. This paper describes our development work on cable preparation, chrome removal, compaction, soldering, and final assembly and presents the test results.

  17. Meeting Energy Reduction Requirements at Joint Base San Antonio

    E-Print Network [OSTI]

    Dschuden, B.; Thomas, F.

    2013-01-01T23:59:59.000Z

    One Team, One Mission: Your Success! The Premier Joint Base in the Department of Defense! Joint Base San Antonio and Energy Program 18 December 2013 Bruce Dschuden, Frank Thomas JBSA Resource Efficiency Managers ESL-KT-13-12-25 CATEE 2013...: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 One Team, One Mission: Your Success! The Premier Joint Base in the Department of Defense! Presenters • Bruce Dschuden, CEM, CSDP, CEA – Sain Engineering Associates • REM...

  18. A Model to Assess Fatigue at Joint-Level Using the Half-Joint Concept

    E-Print Network [OSTI]

    Rodríguez, Inmaculada

    and simulations generated by our animation environment. 1. Introduction The human body is continuously under b Virtual Reality Laboratory. Swiss Federal Institute of Technology Lausanne, Switzerland In this paper we focus on the modeling and evaluation of performance factors as human fatigue at joint level. We

  19. Y.ShimomuraY.Shimomura ITER Joint Central TeamITER Joint Central Team

    E-Print Network [OSTI]

    Structure #12;ICRF All metal Vacuum Transmission Line Support · Avoid dielectric material · Cool through SLIP JOINT COOLING IN COOLING OUT mm VTL GETTER PUMP #12;Mode Converter Support Structure Standard Novgorod and CRPP Lausanne ECRH/ECCD for ITER: ITER-task: Remote steering antenna for ECRH/ECCD #12

  20. Joint Capability Technology Demonstration (JCTD) Industry Day Agenda

    Broader source: Energy.gov [DOE]

    Agenda outlines the activities of the 2014 Smart Power Infrastructure Demonstration for Energy Reliability and Security (SPIDERS) Joint Capability Technology Demonstration (JCTD) Industry Day in Fort Carson, Colorado.

  1. assisted ac joint: Topics by E-print Network

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

    BRAIN INJURY D Reinkensmeyer, David J. 26 Basic Business Structures: Sole Proprietor, Joint Operating Agreements and Partnerships Texas A&M University - TxSpace Summary: Basic...

  2. artificial hip joint: Topics by E-print Network

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

    24 25 Next Page Last Page Topic Index 1 School of Architecture, Design and the Built Environment Project Title: Artificial bone for prosthetic hip joints Computer Technologies and...

  3. Geothermal: Sponsored by OSTI -- Joint Egypt/United States report...

    Office of Scientific and Technical Information (OSTI)

    Joint EgyptUnited States report on EgyptUnited States cooperative energy assessment. Volume 4 of 5 Vols. Annexes 6--10...

  4. Russia-Joint Programme on Resource Efficient and Cleaner Production...

    Open Energy Info (EERE)

    UNIDO and UNEP launched in 1994 a joint programme to establish National Cleaner Production CentresProgrammes (NCPCsNCPPs). An independent evaluation conducted in 20078...

  5. Joint Genome Institute Progress Report 2002-2005

    SciTech Connect (OSTI)

    Gilbert, David

    2005-10-03T23:59:59.000Z

    Progress report covering activities at the DOE-Joint Genome Institute in Walnut Creek, California for the period 2002-2005.

  6. addition predicts joint: Topics by E-print Network

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

    Summary: Joint Channel Estimation and Prediction for OFDM Systems Ian C. Wong and Brian L. Evans Wireless OFDM improves the system throughput by adjusting transmission...

  7. Joint Statement by President Barack Obama of the United States...

    Energy Savers [EERE]

    Barack Obama of the United States of America and Prime Minister Stephen Harper of Canada on Accelerating Economic Recovery and Job Creation Joint Statement by President Barack...

  8. adhesive composite joints: Topics by E-print Network

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

    1 Ultrasonic Imaging Techniques to Evaluate Quality of Fiber Reinforced Composite Materials and their Adhesive Joints CiteSeer Summary: To date, fiber reinforced composite...

  9. JOINT DEPARTMENT OF COMMERCE AND DEPARTMENT OF ENERGY SMART CITIES...

    Office of Environmental Management (EM)

    JOINT DEPARTMENT OF COMMERCE AND DEPARTMENT OF ENERGY SMART CITIES - SMART GROWTH BUSINESS DEVELOPMENT MISSION TO CHINA April 12-17, 2015 I. MISSION DESCRIPTION The United States...

  10. United States and France Sign Joint Statement on Civil Liability...

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

    Statement by U.S. Secretary of Energy, Ernest Moniz, and French Minister of Ecology, Sustainable Development, and Energy, Philippe Martin. "The signing of this joint statement...

  11. Sandia Energy - "Bionic" Liquids from Lignin: Joint BioEnergy...

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

    Liquids from Lignin: Joint BioEnergy Institute Results Pave the Way for Closed-Loop Biofuel Refineries Home Renewable Energy Energy Transportation Energy Biofuels Facilities...

  12. ankle joint stiffness: Topics by E-print Network

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

    displacements of the robot's end-effector subject Paris-Sud XI, Universit de 11 Cartesian stiffness matrix of manipulators with passive joints: analytical approach CERN...

  13. ankle joint loading: Topics by E-print Network

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

    dimensional characteristics of each surface is developed. Artificial joint of granite surfaces are measured,processed, analyzed and three dimensional approaches are carried out...

  14. Joint Maintenance Status Report of Potomac Electric Power Company...

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

    amd PJM Interconnection, LLC Docket No. EO-05-01: Potomac Electric Power Company ("Pepco") and PJM Interconnection, L.L.C. ("PJM") hereby jointly submit this Maintenance...

  15. 2010 Joint Effectiveness Review of Hanford Bldg 336 Corrective...

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

    Joint Assessment of the Effectiveness of Corrective Actions for the Building 336 Accident, July 2010 The U.S. Department of Energy, Office of Independent Oversight, within the...

  16. Inverse problem for bremsstrahlung radiation K. E. Voss and N. J. Fisch

    E-Print Network [OSTI]

    , an analytic inversion has been found that yields the velocity distribution of superthermal electrons given

  17. Inversion of TEM sounding data using the steepest descent and the conjugate gradients methods 

    E-Print Network [OSTI]

    Alsabti, Abdallah S

    2001-01-01T23:59:59.000Z

    -determined problem, the inversion for layer thicknesses proved to be very reliable. I suggested a strategy to use both inversion types in mapping horizontal layers. The under-determined problem was solved by a regularized inversion. A total of 48 inversion runs...

  18. INVERSE SPECTRAL AND SCATTERING THEORY FOR THE HALF-LINE LEFT DEFINITE

    E-Print Network [OSTI]

    INVERSE SPECTRAL AND SCATTERING THEORY FOR THE HALF-LINE LEFT DEFINITE STURM-LIOUVILLE PROBLEM C will prove some uniqueness results for inverse spec- tral theory and inverse scattering for the left definite is via the inverse spectral theory for the left definite problem, which also is not very well developed

  19. Joint Institute for Nanoscience Annual Report 2004

    SciTech Connect (OSTI)

    Baer, Donald R.; Campbell, Charles

    2005-02-01T23:59:59.000Z

    Due to the inherently interdisciplinary nature of nanoscience and nanotechnology, research in this arena is often significantly enhanced through creative cooperative activities. The Joint Institute for Nanoscience (JIN) is a venture of the University of Washington (UW) and Pacific Northwest National Laboratory (PNNL) to encourage and enhance high impact and high quality nanoscience and nanotechnology research that leverages the strengths and capabilities of both institutions, and to facilitate education in these areas. This report summarizes JIN award activities that took place during fiscal year 2004 and provides a historical list of JIN awardees, their resulting publications, and JIN-related meetings. Major portions of the JIN efforts and resources are dedicated to funding graduate students and postdoctoral research associates to perform research in collaborations jointly directed by PNNL staff scientists and UW professors. JIN fellowships are awarded on the basis of applications that include research proposals. They have been very successful in expanding collaborations between PNNL and UW, which have led to many excellent joint publications and presentations and enhanced the competitiveness of both institutions for external grant funding. JIN-based interactions are playing a significant role in creating new research directions and reshaping existing research programs at both the UW and PNNL. The JIN also co-sponsors workshops on Nanoscale Science and Technology, four of which have been held in Seattle and one in Richland. In addition to involving PNNL staff in various UW nanoscience courses and seminars, a National Science Foundation grant, Development of UW-PNL Collaborative Curriculums in Nano-Science and Technology, has allowed the development of three intensive short courses that are taught by UW faculty, PNNL staff, and faculty from other institutions, including Washington State University, the University of Idaho, Stanford University, and the University of Alaska. The JIN agreement recognizes that cooperation beyond UW and PNNL is highly valuable. Starting in early 2003, efforts were initiated to form a regional communication link called the Northwest Nanoscience and Nanotechnology Network (N4). In concept, N4 is a tool to encourage communication and help identify regional resources and nanoscience and technology activities.

  20. Microstructure, Mechanical Behavior, and Clinical Trade-offs in Ultra-High Molecular Weight Polyethylene for Total Joint Replacement

    E-Print Network [OSTI]

    Atwood, Sara Anne

    2010-01-01T23:59:59.000Z

    components for total joint replacement. J Bone Joint Surgcontemporary total knee replacements. Clin Orthop Relat Res(wear in total joint replacement? J Am Acad Orthop Surg, 16

  1. Amsterdam Oxford Joint Rescue Forces Team Description Paper

    E-Print Network [OSTI]

    Visser, Arnoud

    Amsterdam Oxford Joint Rescue Forces Team Description Paper Virtual Robot competition Rescue van Weelden1 , Chaim Bastiaan1 , Niels Out1 , Olaf Zwennes1 , Sev´aztian Soffia Ot´arola1 , Julian de://www.jointrescueforces.eu Abstract. With the progress made in active exploration, the robots of the Joint Rescue Forces are capable

  2. Time- and temperature-dependent failures of a bonded joint

    SciTech Connect (OSTI)

    Sihn, Sangwook; Miyano, Yasushi; Tsai, S.W. [Stanford Univ., Palo Alto, CA (United States)

    1997-07-01T23:59:59.000Z

    Time and temperature dependent properties of a tubular lap bonded joint are reported. The joint bonds a cast iron rod and a composite pipe together with an epoxy type of an adhesive material containing chopped glass fiber. A new fabrication method is proposed.

  3. IU School of Informatics Policy on Joint Appointments

    E-Print Network [OSTI]

    Zhou, Yaoqi

    IU School of Informatics Policy on Joint Appointments Revised ­ 11/11/02 There may be times when joint appointments for faculty are made between IU School of Informatics and other schools or units within Indiana University. This policy summarizes the expectations of the IU School of Informatics

  4. Australia and China A Joint Report on the Bilateral Relationship

    E-Print Network [OSTI]

    Political People-to-people links Education Science and technology Energy, the environment and climate change#12;Australia and China A Joint Report on the Bilateral Relationship #12;AUSTRALIA A Joint Report on the Bilateral Relationship #12;Australian Centre on China in the World College of Asia

  5. 2006 TRANSPORTATION TOMORROW SURVEY JOINT PROGRAM IN TRANSPORTATION

    E-Print Network [OSTI]

    Toronto, University of

    2006 TRANSPORTATION TOMORROW SURVEY JOINT PROGRAM IN TRANSPORTATION UNIVERSITY OF TORONTO 2006 Transportation Tomorrow Survey Data Presentation #12;2006 TRANSPORTATION TOMORROW SURVEY JOINT PROGRAM IN TRANSPORTATION UNIVERSITY OF TORONTO City of Hamilton City of Kawartha Lakes City of Guelph City of Brantford

  6. ARGONNE JOINT STAFF EMPLOYMENT FORM Effective 07/2010

    E-Print Network [OSTI]

    He, Chuan

    . ARGONNE JOINT STAFF EMPLOYMENT FORM Effective 07/2010 Page 1 of 1 Questions about this form Hawaiian/Pacific Islander Check Delivery Code ___________ Argonne Joint Staff Appointment -- Non ________________________________________________ Vice President for Research Date and for Argonne National Laboratory HR: INSTRUCTIONS: This form should

  7. Majorana Demonstrator Bolted Joint Mechanical and Thermal Analysis

    SciTech Connect (OSTI)

    Aguayo Navarrete, Estanislao; Reid, Douglas J.; Fast, James E.

    2012-06-01T23:59:59.000Z

    The MAJORANA DEMONSTRATOR is designed to probe for neutrinoless double-beta decay, an extremely rare process with a half-life in the order of 1026 years. The experiment uses an ultra-low background, high-purity germanium detector array. The germanium crystals are both the source and the detector in this experiment. Operating these crystals as ionizing radiation detectors requires having them under cryogenic conditions (below 90 K). A liquid nitrogen thermosyphon is used to extract the heat from the detectors. The detector channels are arranged in strings and thermally coupled to the thermosyphon through a cold plate. The cold plate is joined to the thermosyphon by a bolted joint. This circular plate is housed inside the cryostat can. This document provides a detailed study of the bolted joint that connects the cold plate and the thermosyphon. An analysis of the mechanical and thermal properties of this bolted joint is presented. The force applied to the joint is derived from the torque applied to each one of the six bolts that form the joint. The thermal conductivity of the joint is measured as a function of applied force. The required heat conductivity for a successful experiment is the combination of the thermal conductivity of the detector string and this joint. The thermal behavior of the joint is experimentally implemented and analyzed in this study.

  8. Microstructural evolution of eutectic Au-Sn solder joints

    SciTech Connect (OSTI)

    Song, Ho Geon

    2002-05-31T23:59:59.000Z

    Current trends toward miniaturization and the use of lead(Pb)-free solder in electronic packaging present new problems in the reliability of solder joints. This study was performed in order to understand the microstructure and microstructural evolution of small volumes of nominally eutectic Au-Sn solder joints (80Au-20Sn by weight), which gives insight into properties and reliability.

  9. Joint Source-Channel Coding via Turbo Codes

    E-Print Network [OSTI]

    Alajaji, Fady

    Joint Source-Channel Coding via Turbo Codes by Guang-Chong Zhu A dissertation submitted coding. One of the most exciting break- throughs in channel coding is the invention of Turbo codes, whose- tigate three joint source-channel coding issues in the context of Turbo codes. In the #12;rst part

  10. Joint Synchronization and Decoding Exploiting the Turbo Principle

    E-Print Network [OSTI]

    Regalia, Phillip A.

    Joint Synchronization and Decoding Exploiting the Turbo Principle John M. Walsh and C. Richard´el´ecommunications/GET 91011 Evry cedex France Abstract-- This paper investigates turbo methods for joint synchronization and decoding in pulse amplitude modulated (PAM) systems. We begin with a brief review of the turbo principle

  11. BUCKLING OF DOUBLE BELLOWS EXPANSION JOINTS UNDER INTERNAL PRESSURE

    E-Print Network [OSTI]

    Newland, David E.

    of the bellows and the bellows supporting structure. To reduce the susceptibility to buckling, lateral supports270 BUCKLING OF DOUBLE BELLOWS EXPANSION JOINTS UNDER INTERNAL PRESSURE By D. E. Newland* Corrugated bellows expansion joints may buckle under internal pressure in the same way as an elasticstrut may

  12. Image Appraisal for 2D and 3D Electromagnetic Inversion

    SciTech Connect (OSTI)

    Alumbaugh, D.L.; Newman, G.A.

    1999-01-28T23:59:59.000Z

    Linearized methods are presented for appraising image resolution and parameter accuracy in images generated with two and three dimensional non-linear electromagnetic inversion schemes. When direct matrix inversion is employed, the model resolution and posterior model covariance matrices can be directly calculated. A method to examine how the horizontal and vertical resolution varies spatially within the electromagnetic property image is developed by examining the columns of the model resolution matrix. Plotting the square root of the diagonal of the model covariance matrix yields an estimate of how errors in the inversion process such as data noise and incorrect a priori assumptions about the imaged model map into parameter error. This type of image is shown to be useful in analyzing spatial variations in the image sensitivity to the data. A method is analyzed for statistically estimating the model covariance matrix when the conjugate gradient method is employed rather than a direct inversion technique (for example in 3D inversion). A method for calculating individual columns of the model resolution matrix using the conjugate gradient method is also developed. Examples of the image analysis techniques are provided on 2D and 3D synthetic cross well EM data sets, as well as a field data set collected at the Lost Hills Oil Field in Central California.

  13. Finite element analysis of human joints

    SciTech Connect (OSTI)

    Bossart, P.L.; Hollerbach, K.

    1996-09-01T23:59:59.000Z

    Our work focuses on the development of finite element models (FEMs) that describe the biomechanics of human joints. Finite element modeling is becoming a standard tool in industrial applications. In highly complex problems such as those found in biomechanics research, however, the full potential of FEMs is just beginning to be explored, due to the absence of precise, high resolution medical data and the difficulties encountered in converting these enormous datasets into a form that is usable in FEMs. With increasing computing speed and memory available, it is now feasible to address these challenges. We address the first by acquiring data with a high resolution C-ray CT scanner and the latter by developing semi-automated method for generating the volumetric meshes used in the FEM. Issues related to tomographic reconstruction, volume segmentation, the use of extracted surfaces to generate volumetric hexahedral meshes, and applications of the FEM are described.

  14. Joint Institute for Nanoscience Annual Report 2003

    SciTech Connect (OSTI)

    Baer, Donald R.; Campbell, Charles

    2004-02-01T23:59:59.000Z

    The Joint Institute for Nanoscience (JIN) is a cooperative venture of the University of Washington and Pacific Northwest National Laboratory to encourage and enhance high-impact and high-quality nanoscience and nanotechnology of all types. This first annual report for the JIN summarizes activities beginning in 2001 and ending at the close of fiscal year 2003 and therefore represents somewhat less than two years of activities. Major portions of the JIN resources are dedicated to funding graduate students and postdoctoral research associates to perform research in collaborations jointly directed by Pacific Northwest National Laboratory (PNNL) staff scientists and University of Washington (UW) professors. These fellowships were awarded on the basis of applications that included research proposals. JIN co-sponsors an annual Nanoscale Science and Technology Workshop held in Seattle. In addition to involving PNNL staff in various UW nanoscience courses and seminars, a National Science Foundation grant Development of UW-PNL Collaborative Curriculums in Nano-Science and Technology has allowed the development of three intensive short courses that are taught by UW faculty, PNNL staff, and faculty from other institutions, including Washington State University, the University of Idaho, Stanford University, and the University of Alaska. The initial JIN agreement recognized that expansion of cooperation beyond UW and PNNL would be highly valuable. Starting in early 2003, efforts were initiated to form a regional communication link called the Northwest Nanoscience and Nanotechnology Network (N?). In concept, N? is a tool to encourage communication and help identify regional resources and nanoscience and technology activities.

  15. Jointly Sponsored Research Program Energy Related Research

    SciTech Connect (OSTI)

    Western Research Institute

    2009-03-31T23:59:59.000Z

    Cooperative Agreement, DE-FC26-98FT40323, Jointly Sponsored Research (JSR) Program at Western Research Institute (WRI) began in 1998. Over the course of the Program, a total of seventy-seven tasks were proposed utilizing a total of $23,202,579 in USDOE funds. Against this funding, cosponsors committed $26,557,649 in private funds to produce a program valued at $49,760,228. The goal of the Jointly Sponsored Research Program was to develop or assist in the development of innovative technology solutions that will: (1) Increase the production of United States energy resources - coal, natural gas, oil, and renewable energy resources; (2) Enhance the competitiveness of United States energy technologies in international markets and assist in technology transfer; (3) Reduce the nation's dependence on foreign energy supplies and strengthen both the United States and regional economies; and (4) Minimize environmental impacts of energy production and utilization. Under the JSR Program, energy-related tasks emphasized enhanced oil recovery, heavy oil upgrading and characterization, coal beneficiation and upgrading, coal combustion systems development including oxy-combustion, emissions monitoring and abatement, coal gasification technologies including gas clean-up and conditioning, hydrogen and liquid fuels production, coal-bed methane recovery, and the development of technologies for the utilization of renewable energy resources. Environmental-related activities emphasized cleaning contaminated soils and waters, processing of oily wastes, mitigating acid mine drainage, and demonstrating uses for solid waste from clean coal technologies, and other advanced coal-based systems. Technology enhancement activities included resource characterization studies, development of improved methods, monitors and sensors. In general the goals of the tasks proposed were to enhance competitiveness of U.S. technology, increase production of domestic resources, and reduce environmental impacts associated with energy production and utilization. This report summarizes the accomplishments of the JSR Program.

  16. Joint Use School Partnerships in California: Strategies to Enhance Schools and Communities

    E-Print Network [OSTI]

    Vincent, Jeffrey M; Cooper, Tamar

    2008-01-01T23:59:59.000Z

    implementing, and operating joint use  partnerships is to approve  the joint use operating agreement.    CUSD and of building and operating these joint  use facilities. 8  

  17. Elastic-plastic analysis of the transition divertor joint for high performance divertor target plate

    E-Print Network [OSTI]

    Navaei, Dara

    2011-01-01T23:59:59.000Z

    power plant starts operating, the joints’ temperature neverabove the operating temperature of the joints (600-700 °C).above the operating temperature of the joints (600 °C to 700

  18. Coordinate system dependence of muscle forces predicted using optimization methods in musculoskeletal joints

    E-Print Network [OSTI]

    Pierce, Janine E. (Janine Elizabeth), 1980-

    2004-01-01T23:59:59.000Z

    Optimization methods are widely used to predict in-vivo muscle forces in musculoskeletal joints. Moment equilibrium at the joint center (usually defined as the origin of the joint coordinate system) has been used as a ...

  19. Analysis of drilling fluid rheology and tool joint effect to reduce errors in hydraulics calculations 

    E-Print Network [OSTI]

    Viloria Ochoa, Marilyn

    2006-10-30T23:59:59.000Z

    .........................................................................45 V HYDRAULICS ....................................................................................49 5.1 Friction Pressure Loss Calculation..........................................50 VI TOOL JOINT... ......................................................................................71 6.1 Weld-On Tool Joint..................................................................71 VII STUDY APPROACHES TO ESTIMATE PRESSURE LOSSES BY CORRECTING FOR TOOL JOINT LOSSES .....................................77 7...

  20. Temperature inversion in long-range interacting systems

    E-Print Network [OSTI]

    Teles, Tarcisio N; Casetti, Lapo

    2015-01-01T23:59:59.000Z

    Temperature inversions occur in nature, e.g., in the solar corona and in interstellar molecular clouds: somewhat counterintuitively, denser parts of the system are colder than dilute ones. We propose a simple and appealing mechanism to spontaneously generate temperature inversions in systems with long-range interactions, by preparing them in inhomogeneous thermal equilibrium states and then applying an impulsive perturbation. In similar situations, short-range systems would typically relax to another thermal equilibrium, with uniform temperature profile. By contrast, in long-range systems, the interplay between wave-particle interaction and spatial inhomogeneity drives the system to nonequilibrium stationary states that generically exhibit temperature inversion. Our work underlines the crucial role the range of interparticle interaction plays in determining the nature of steady states attained when macroscopic systems are brought out of thermal equilibrium.

  1. Parameterization of geophysical inversion model using particle clustering

    E-Print Network [OSTI]

    Yang, Dikun

    2015-01-01T23:59:59.000Z

    This paper presents a new method of constructing physical models in a geophysical inverse problem, when there are only a few possible physical property values in the model and they are reasonably known but the geometry of the target is sought. The model consists of a fixed background and many small "particles" as building blocks that float around in the background to resemble the target by clustering. This approach contrasts the conventional geometric inversions requiring the target to be regularly shaped bodies, since here the geometry of the target can be arbitrary and does not need to be known beforehand. Because of the lack of resolution in the data, the particles may not necessarily cluster when recovering compact targets. A model norm, called distribution norm, is introduced to quantify the spread of particles and incorporated into the objective function to encourage further clustering of the particles. As proof of concept, 1D magnetotelluric inversion is used as example. My experiments reveal that the ...

  2. Lepton Number Violation within the Conformal Inverse Seesaw

    E-Print Network [OSTI]

    Humbert, Pascal; Patra, Sudhanwa; Smirnov, Juri

    2015-01-01T23:59:59.000Z

    We present a novel framework within the conformal inverse seesaw scheme allowing large lepton number violation while the neutrino mass formula is still governed by the low-scale inverse seesaw mechanism. This model includes new contributions to rare low-energy lepton number violating processes like neutrinoless double beta decay. We find that the lifetime for this rare process due to heavy sterile neutrinos can saturate current experimental limits. The characteristic collider signature of the present conformal inverse seesaw scheme includes, same-sign dilepton plus two jets and same-sign dilepton plus four jets. Finally, we comment on the testability of the model at the Large Hadron Collider since there are new scalars, new fermions and an extra neutral gauge boson with masses around few 100 GeV to few TeV.

  3. Sideband generation of transient lasing without population inversion

    E-Print Network [OSTI]

    Luqi Yuan; Da-Wei Wang; Christopher O'Brien; Anatoly A. Svidzinsky; Marlan O. Scully

    2014-08-21T23:59:59.000Z

    We suggest a method to generate coherent short pulses by generating a frequency comb using lasing without inversion in the transient regime. We use a universal method to study the propagation of a pulse in various spectral regions through an active medium that is strongly driven on a low-frequency transition on a time scale shorter than the decoherence time. The results show gain on the sidebands at different modes can be produced even if there is no initial population inversion prepared. Besides the production of ultra-short pulse this frequency comb may have applications towards making short-wavelength or Tera-hertz lasers.

  4. artificial atlanto-odontoid joint: Topics by E-print Network

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

    In 1981,193 joint ventures with the par- ticipation of Japanese capital were operating in 47 nations 111 Joint Degrees & Promotion towards European Students Computer...

  5. Thermal and mechanical joints to cryo-cooled silicon monochromator crystals

    E-Print Network [OSTI]

    MacDowell, A.; Fakra, S.; Morrison, G.

    2006-01-01T23:59:59.000Z

    resistance of the joint. The operating temperature of –150 ooperating temperature range was as small as possible in an attempt to reduce the strain in the joint and

  6. Joint Statement on Future U.S.-Russia Nuclear Energy and Nonproliferat...

    Energy Savers [EERE]

    Joint Statement on Future U.S.-Russia Nuclear Energy and Nonproliferation Collaboration Following Russian Delegation Visit to the United States Joint Statement on Future...

  7. Feasibility of a fast inverse dose optimization algorithm for IMRT via matrix inversion without negative beamlet intensities

    SciTech Connect (OSTI)

    Goldman, S.P.; Chen, J.Z.; Battista, J.J. [Department of Physics and Astronomy, University of Western Ontario, London, Ontario N6A 3K7 (Canada); Department of Medical Biophysics and Department of Oncology, University of Western Ontario and London Regional Cancer Program, London Health Sciences Centre, London, Ontario N6A 4L6 (Canada)

    2005-09-15T23:59:59.000Z

    A fast optimization algorithm is very important for inverse planning of intensity modulated radiation therapy (IMRT), and for adaptive radiotherapy of the future. Conventional numerical search algorithms such as the conjugate gradient search, with positive beam weight constraints, generally require numerous iterations and may produce suboptimal dose results due to trapping in local minima. A direct solution of the inverse problem using conventional quadratic objective functions without positive beam constraints is more efficient but will result in unrealistic negative beam weights. We present here a direct solution of the inverse problem that does not yield unphysical negative beam weights. The objective function for the optimization of a large number of beamlets is reformulated such that the optimization problem is reduced to a linear set of equations. The optimal set of intensities is found through a matrix inversion, and negative beamlet intensities are avoided without the need for externally imposed ad-hoc constraints. The method has been demonstrated with a test phantom and a few clinical radiotherapy cases, using primary dose calculations. We achieve highly conformal primary dose distributions with very rapid optimization times. Typical optimization times for a single anatomical slice (two dimensional) (head and neck) using a LAPACK matrix inversion routine in a single processor desktop computer, are: 0.03 s for 500 beamlets; 0.28 s for 1000 beamlets; 3.1 s for 2000 beamlets; and 12 s for 3000 beamlets. Clinical implementation will require the additional time of a one-time precomputation of scattered radiation for all beamlets, but will not impact the optimization speed. In conclusion, the new method provides a fast and robust technique to find a global minimum that yields excellent results for the inverse planning of IMRT.

  8. Joint Extension of States of Subsystems for a CAR System

    E-Print Network [OSTI]

    Huzihiro Araki; Hajime Moriya

    2004-05-14T23:59:59.000Z

    The problem of existence and uniqueness of a state of a joint system with given restrictions to subsystems is studied for a Fermion system, where a novel feature is non-commutativity between algebras of subsystems. For an arbitrary (finite or infinite) number of given subsystems, a product state extension is shown to exist if and only if all states of subsystems except at most one are even (with respect to the Fermion number). If the states of all subsystems are pure, then the same condition is shown to be necessary and sufficient for the existence of any joint extension. If the condition holds, the unique product state extension is the only joint extension. For a pair of subsystems, with one of the given subsystem states pure, a necessary and sufficient condition for the existence of a joint extension and the form of all joint extensions (unique for almost all cases) are given. For a pair of subsystems with non-pure subsystem states, some classes of examples of joint extensions are given where non-uniqueness of joint extensions prevails.

  9. Proceedings of the Third International Workshop on Jointed Structures.

    SciTech Connect (OSTI)

    Starr, Michael James; Brake, Matthew Robert; Segalman, Daniel Joseph; Bergman, Lawrence A. [University of Illinois at Urbana-Champaign, Urbana, IL; Ewins, David J. [Imperial College London, London, UK

    2013-08-01T23:59:59.000Z

    The Third International Workshop on Jointed Structures was held from August 16th to 17th, 2012, in Chicago Illinois, following the ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Thirty two researchers from both the United States and international locations convened to discuss the recent progress of mechanical joints related research and associated efforts in addition to developing a roadmap for the challenges to be addressed over the next five to ten years. These proceedings from the workshop include the minutes of the discussions and follow up from the 2009 workshop [1], presentations, and outcomes of the workshop. Specifically, twelve challenges were formulated from the discussions at the workshop, which focus on developing a better understanding of uncertainty and variability in jointed structures, incorporating high fidelity models of joints in simulations that are tractable/efficient, motivating a new generation of researchers and funding agents as to the importance of joint mechanics research, and developing new insights into the physical phenomena that give rise to energy dissipation in jointed structures. The ultimate goal of these research efforts is to develop a predictive model of joint mechanics.

  10. A spherical joint piston design for high speed diesel engines

    SciTech Connect (OSTI)

    Wiczynski, P.D. [Cummins Engine Co., Inc., Columbus, IN (United States); Mielke, S. [Kolbenschmidt AG, Neckarsulm (Germany); Conrow, R.

    1996-09-01T23:59:59.000Z

    A spherical joint piston and connecting rod have been developed through design proof-of-concept. The spherical joint allows piston rotation. The benefits of a rotating, symmetrical piston are: mechanical and thermal load symmetry, improved ring sealing and lubrication, and reduced bearing loads, scuffing, clearances and oil consumption. The assembly includes a squeeze cast, fiber reinforced aluminum spherical joint piston. Reinforcement is located in the piston bowl and skirt. The connecting rod consists of a spherical small end positioned on an elliptical cross-sectioned shank blended into a conventional big end. The assembly has operated at cylinder pressures exceeding of 24 MPa.

  11. The quality assurance of heat fused thermoplastic pipeline joints

    E-Print Network [OSTI]

    Earles, Larry Lee

    1982-01-01T23:59:59.000Z

    with no Heating Pressure 23 6 Temperature Distribution in Drisco 6500 with 25 psi Heating Pressure 7 Three-Dimensional Temperature Distribution in Drisco 6500 During the Fusion Cycle (Heating Time = 30 sec) 8 Heat Transfer Nodel Used to Nodel the Heating... of Temperature on Joint Strength from the Latin Square Using Drisco 8000 with the Bead Removed 52 25 Effect of Heating Time on Joint Strength From the Latin Square Using Drisco 8000 with the Bead Removed 53 26 Effect of Fusion Pressure on Joint Strength...

  12. Mesh Puppetry: Cascading Optimization of Mesh Deformation with Inverse Kinematics

    E-Print Network [OSTI]

    Zhou, Kun

    approach builds upon traditional rigging by optimizing skeleton position and vertex weights. Keywords: Mesh deformation, nonlinear optimization, inverse kinematics, geometry processing. 1 Introduction,mathieu}@caltech.edu Figure 1: Armadillo Olympics: The Armadillo model (top left) can be deformed to take various sport poses

  13. Directional Wetting in Anisotropic Inverse Opals Katherine R. Phillips,

    E-Print Network [OSTI]

    Aizenberg, Joanna

    the nano- to microscale voids. Here, we investigate how liquid wetting in highly ordered inverse opals template of colloidal particles. This highly ordered structure acts as a photonic crystal, strongly or not a given liquid will fill the structure spontaneously upon contact. Using alkylchlorosi- lanes,18 silica

  14. Inverse Marx modulators for self-biasing klystron depressed collectors

    SciTech Connect (OSTI)

    Kemp, Mark A. [SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

    2014-08-28T23:59:59.000Z

    A novel pulsed depressed collector biasing scheme is proposed. This topology feeds forward energy recovered during one RF pulse for use on the following RF pulse. The presented ''inverse'' Marx charges biasing capacitors in series, and discharges them in parallel. Simulations are shown along with experimental demonstration on a 62kW klystron.

  15. The Laplace Transform 1 Laplace transform and inverse transform

    E-Print Network [OSTI]

    Yengulalp, Lynne

    The Laplace Transform Name: 1 Laplace transform and inverse transform Definition. Let f(t) be a function defined for t 0. Then the integral L {f(t)} = 0 e-st f(t)dt is said to be the Laplace transform of f provided the integral converges. Fill in the following Laplace transforms. L {tn } = L {eat } = L

  16. Nuclear applications of inverse scattering, present ... and future?

    E-Print Network [OSTI]

    R. S. Mackintosh

    2005-10-03T23:59:59.000Z

    There now exists a practical method (IP) for the routine inversion of $S$-matrix elements to produce the corresponding potential. It can be applied to spin-1/2 and spin-1 projectiles. We survey the ways that IP inversion can be applied in nuclear physics by inverting $S_{lj}$ derived from theory or from experiment. The IP inversion method can be extended to invert $S_{lj}(E)$ over a range of energies to produce a potential $V(r,E) + \\vect{l}\\vdot\\gvect{\\sigma} V_{\\rm ls}(r,E)$. It also yields parity-dependent potentials between pairs of light nuclei and can be convoluted with a direct search on the $S$-matrix to produce `direct data $\\to V$ inversion'. The last is an economical alternative form of optical model search to fit many observables (e.g. for polarized deuterons) for many energies, producing an energy-dependent potential with many parameters (e.g. $T_{\\rm R}$ for deuterons).

  17. Humanoid Walking Robot: Modeling, Inverse Dynamics, and Gain Scheduling Control

    E-Print Network [OSTI]

    Williams II, Robert L.

    and Robert L. Williams II Department of Mechanical Engineering Ohio University, Athens, OH 45701 Revised trajectories, recorded from real human walking cycle data. Kinematic and dynamic analysis is discussed. This analysis is accompanied by a comparison with available experimental data. Finally, an inverse plant

  18. APPROXIMATE INVERSE PRECONDITIONING FOR THE CONJUGATE GRADIENT METHOD

    E-Print Network [OSTI]

    Tùma, Miroslav

    APPROXIMATE INVERSE PRECONDITIONING FOR THE CONJUGATE GRADIENT METHOD ON A VECTOR COMPUTER Michele definite matrix, by the preconditioned conjugate gradient method (PCG) (see, e.g., [4]). It is well of the conjugate gradient method reduces to computing a matrix­ vector product with G, an operation which offers

  19. DISCRIMINATION AND CLASSIFICATION OF UXO USING MAGNETOMETRY: INVERSION AND ERROR

    E-Print Network [OSTI]

    Sambridge, Malcolm

    DISCRIMINATION AND CLASSIFICATION OF UXO USING MAGNETOMETRY: INVERSION AND ERROR ANALYSIS USING for the different solutions didn't even overlap. Introduction A discrimination and classification strategy ambiguity and possible remanent magnetization the recovered dipole moment is compared to a library

  20. Inversion of Hydrological Tracer Test Data Using TomogrpahicConstraints

    SciTech Connect (OSTI)

    Linde, Niklas; Finsterle, Stefan; Hubbard, Susan

    2004-11-11T23:59:59.000Z

    A reasonable description of the hydraulic conductivity structure is a prerequisite for modeling contaminant transport. However, formulations of hydrogeological inverse problems utilizing hydrogeological data only often fail to reliably resolve features at a resolution required for accurately predicting transport. Incorporation of geophysical data into the inverse problem offers the potential to increase this resolution. In this study, we invert hydrological tracer test data using the shape and relative magnitude variations derived from geophysical tomographic data to regionalize a hydrogeological inverse problem in order to estimate the hydraulic conductivity structure. Our approach does not require that the petrophysical relationship be known a-priori, but that it is linear and stationary within each geophysical anomaly. However, tomograms are imperfect models of geophysical properties and geophysical properties are not necessarily strongly linked to hydraulic conductivity. Therefore, we focus on synthetic examples where the correlation between radar velocity and hydraulic conductivity, as well as the geophysical data acquisition errors, are varied in order to assess what aspects of the hydraulic conductivity structure we can expect to resolve under different conditions. The results indicate that regularization of the tracer inversion procedure using geophysical data improves estimates of hydraulic conductivity. We find that even under conditions of corrupted geophysical data, we can accurately estimate the effective hydraulic conductivity and areas of high and low hydraulic conductivity. However, given imperfect geophysical data, our results suggest that we cannot expect accurate estimates of the variability of the hydraulic conductivity structure.

  1. Optimization Methods in Direct and Inverse Alexander G. Ramm1

    E-Print Network [OSTI]

    Optimization Methods in Direct and Inverse Scattering Alexander G. Ramm1 and Semion Gutman2 1- mization problem, and solved by the Hybrid Stochastic-Deterministic minimization algorithm. A similar for the case of spherically symmetric potentials and fixed-energy phase shifts as the scattering data

  2. On nonsingular potentials of Cox-Thompson inversion scheme

    E-Print Network [OSTI]

    Tamas Palmai; Barnabas Apagyi

    2011-11-25T23:59:59.000Z

    We establish a condition for obtaining nonsingular potentials using the Cox-Thompson inverse scattering method with one phase shift. The anomalous singularities of the potentials are avoided by maintaining unique solutions of the underlying Regge-Newton integral equation for the transformation kernel. As a by-product, new inequality sequences of zeros of Bessel functions are discovered.

  3. The Inverse Kinetics Method and PID Compensation of the

    E-Print Network [OSTI]

    The Inverse Kinetics Method and PID Compensation of the Annular Core Research Reactor by Benjamin Kinetics Method and PID Compensation of the Annular Core Research Reactor by Benjamin Garnas ABSTRACT Kinetics Method and PID Compensation of the Annular Core Research Reactor by Benjamin Garnas B.S. General

  4. A family of inversion formulas in Thermoacoustic Tomography

    E-Print Network [OSTI]

    Nguyen, Linh V

    2009-01-01T23:59:59.000Z

    We present a family of closed form inversion formulas in thermoacoustic tomography in the case of a constant sound speed. The formulas are presented in both time-domain and frequency-domain versions. As special cases, they imply most of the previously known filtered backprojection type formulas.

  5. Shape Reconstruction of Inverse Medium Scattering for the ...

    E-Print Network [OSTI]

    2011-11-03T23:59:59.000Z

    In practice, it is convenient to reduce the problem to a bounded domain by ... The well-posedness of the direct scattering is proved, and important energy. 2 .... The proof is completed by combining (2.6) and (2.4). Remark 2.1. .... It is essential for the success and efficiency of the inverse obstacle scattering to have a good and.

  6. Inverse diffusion from knowledge of power densities Guillaume Bal

    E-Print Network [OSTI]

    Bal, Guillaume

    asymptotic expansions and (Fourier) transformation, this allow us to construct the power density) provides access to the power density H(x) = (x)|u|2 (x) for all x inside the domain of interestInverse diffusion from knowledge of power densities Guillaume Bal , Eric Bonnetier , Fran

  7. Nonlinear Fourier Analysis The Direct & Inverse Scattering Transforms

    E-Print Network [OSTI]

    Christov, Ivan C.

    Nonlinear Fourier Analysis The Direct & Inverse Scattering Transforms for the Korteweg­de Vries by ONR/NRL funding. Nonlinear Fourier Analysis ­ p.1/15 #12;Background & Introduction (I) 1895: Korteweg equations known as the Scattering Transform. Nonlinear Fourier Analysis ­ p.2/15 #12;Background

  8. Assessing streamaquifer interactions through inverse modeling of flow routing q

    E-Print Network [OSTI]

    Szilagyi, Jozsef

    Assessing stream­aquifer interactions through inverse modeling of flow routing q Jozsef Szilagyi a and Nieber, 1977; Troch et al., 1993; Brutsaert and Lopez, 1998; Szilagyi et al., 1998; Par- lange et al., 2001; Szilagyi, 2003a). Knowledge of this inter- action between streamflow and groundwater during flood

  9. Inverse-design and optimization methods for centrifugal pump impellers

    E-Print Network [OSTI]

    Twente, Universiteit

    to be incompressible. As such, these methods are applicable to pumps, fans and hydraulic turbines. Furthermore details can lead to large changes in performance, like resulting head, efficiency and cavitation as input and the flow field and the performance are obtained as a result. In contrast, for an inverse

  10. INVERSION OF CONVERTED-WAVE SEISMIC DATA FOR RESERVOIR CHARACTERIZATION

    E-Print Network [OSTI]

    INVERSION OF CONVERTED-WAVE SEISMIC DATA FOR RESERVOIR CHARACTERIZATION AT RULISON FIELD, COLORADO Basin of northwest Colorado. The reservoir consists of lenticular fluvial sands, shales, and coals of magnitude lower than the seismic resolution which is 105 ft. The sandstone reservoirs are the primary target

  11. Using Expert Knowledge in Solving the Seismic Inverse Problem ?

    E-Print Network [OSTI]

    Ward, Karen

    practical applications, it it important to solve the seismic inverse problem, i.e., to measure seismic exhausted. Even under the best conservation policies, there is (and there will be) a constant need to find that there are resources such as minerals at a certain location is to actually drill a borehole and analyze the materials

  12. Remote controlled vacuum joint closure mechanism

    DOE Patents [OSTI]

    Doll, David W. (San Diego, CA); Hager, E. Randolph (La Jolla, CA)

    1986-01-01T23:59:59.000Z

    A remotely operable and maintainable vacuum joint closure mechanism for a noncircular aperture is disclosed. The closure mechanism includes an extendible bellows coupled at one end to a noncircular duct and at its other end to a flange assembly having sealed grooves for establishing a high vacuum seal with the abutting surface of a facing flange which includes an aperture forming part of the system to be evacuated. A plurality of generally linear arrangements of pivotally coupled linkages and piston combinations are mounted around the outer surface of the duct and aligned along the length thereof. Each of the piston/linkage assemblies is adapted to engage the flange assembly by means of a respective piston and is further coupled to a remote controlled piston drive shaft to permit each of the linkages positioned on a respective flat outer surface of the duct to simultaneously and uniformly displace a corresponding piston and the flange assembly with which it is in contact along the length of the duct in extending the bellows to provide a high vacuum seal between the movable flange and the facing flange. A plurality of latch mechanisms are also pivotally mounted on the outside of the duct. A first end of each of the latch mechanisms is coupled to a remotely controlled latch control shaft for displacing the latch mechanism about its pivot point. In response to the pivoting displacement of the latch mechanism, a second end thereof is displaced so as to securely engage the facing flange.

  13. The institutional needs of joint implementation projects

    SciTech Connect (OSTI)

    Watt, E.; Sathaye, J. [Lawrence Berkeley Lab., CA (United States); Buen, O. de; Masera, O. [National Univ. of Mexico, Mexico City (Mexico); Gelil, I.A. [Organization of Energy Conservation and Planning, Cairo (Egypt); Ravindranath, N.H. [Indian Inst. of Science, Bangalore (India); Zhou, D.; Li, J. [Energy Research Inst., Beijing (China); Intarapravich, D. [Thailand Environmental Inst., Bangkok (Thailand)

    1995-10-21T23:59:59.000Z

    In this paper, the authors discuss options for developing institutions for joint implementation (JI) projects. They focus on the tasks which are unique to JI projects or require additional institutional needs--accepting the project by the host and investor countries and assessing the project`s greenhouse gas (GHG) emission reduction or sequestration--and they suggest the types of institutions that would enhance their performance. The evaluation is based on four sets of governmental and international criteria for JI projects, the experiences of ten pilot JI projects, and the perspectives of seven collaborating authors from China, Egypt, India, Mexico, and Thailand, who interviewed relevant government and non-government staff involved in JI issue assessment in their countries. After examining the roles for potential JI institutions, they present early findings arguing for a decentralized national JI structure, which includes: (1) national governmental panels providing host country acceptance of proposed JI projects; (2) project parties providing the assessment data on the GHG reduction or sequestration for the projects; (3) technical experts calculating these GHG flows; (4) certified verification teams checking the GHG calculations; and (5) members of an international JI Secretariat training and certifying the assessors, as well as resolving challenges to the verifications. 86 refs.

  14. Jointly Sponsored Research Program. Final report

    SciTech Connect (OSTI)

    NONE

    1997-07-01T23:59:59.000Z

    The Jointly Sponsored Research Program (JSRP) is a US Department of Energy (DOE) program funded through the Office of Fossil Energy and administered at the Morgantown Energy Technology Center. Under this program, which has been in place since Fiscal Year 1990, DOE makes approximately $2.5 million available each year to the Energy and Environmental Research Center (EERC) to fund projects that are of current interest to industry but which still involve significant risk, thus requiring some government contribution to offset the risk if the research is to move forward. The program guidelines require that at least 50% of the project funds originate from nonfederal sources. Projects funded under the JSRP often originate under a complementary base program, which funds higher-risk projects. The projects funded in Fiscal Year 1996 addressed a wide range of Fossil Energy interests, including hot-gas filters for advanced power systems; development of cleaner, more efficient processing technologies; development of environmental control technologies; development of environmental remediation and reuse technologies; development of improved analytical techniques; and development of a beneficiation technique to broaden the use of high-sulfur coal. Descriptions and status for each of the projects funded during the past fiscal year are included in Section A of this document, Statement of Technical Progress.

  15. Bayesian model selection applied to self-noise geoacoustic inversion

    E-Print Network [OSTI]

    Buckingham, Michael

    -water environments. In this paper, Gibbs sampling is used to obtain joint and marginal posterior probability of seabed geology, these parameters enable performance predictions for sonar systems operating in shallow, plant and hydrody- namic noise generated by the tow ship as a by-product of its normal operation is used

  16. KYLE T. SPIKES Assistant Professor Department of Geological Sciences

    E-Print Network [OSTI]

    Yang, Zong-Liang

    , the In Salah project Source: Lawrence Livermore National Laboratory Amount: $27,000 PI, Rock, Exp. Dec. 2014, Time-lapse study of CO2 injection through the integration of rock-physics modeling Shale: Rock physics modeling, prestack seismic inversion, and grid searching Bernardo Moyano (co

  17. Interpreting Helioseismic Structure Inversion Results of Solar Active Regions

    E-Print Network [OSTI]

    Chia-Hsien Lin; Sarbani Basu; Linghuai Li

    2008-09-08T23:59:59.000Z

    Helioseismic techniques such as ring-diagram analysis have often been used to determine the subsurface structural differences between solar active and quiet regions. Results obtained by inverting the frequency differences between the regions are usually interpreted as the sound-speed differences between them. These in turn are used as a measure of temperature and magnetic-field strength differences between the two regions. In this paper we first show that the "sound-speed" difference obtained from inversions is actually a combination of sound-speed difference and a magnetic component. Hence, the inversion result is not directly related to the thermal structure. Next, using solar models that include magnetic fields, we develop a formulation to use the inversion results to infer the differences in the magnetic and thermal structures between active and quiet regions. We then apply our technique to existing structure inversion results for different pairs of active and quiet regions. We find that the effect of magnetic fields is strongest in a shallow region above 0.985R_sun and that the strengths of magnetic-field effects at the surface and in the deeper (r < 0.98R_sun) layers are inversely related, i.e., the stronger the surface magnetic field the smaller the magnetic effects in the deeper layers, and vice versa. We also find that the magnetic effects in the deeper layers are the strongest in the quiet regions, consistent with the fact that these are basically regions with weakest magnetic fields at the surface. Because the quiet regions were selected to precede or follow their companion active regions, the results could have implications about the evolution of magnetic fields under active regions.

  18. adaptive independent joint: Topics by E-print Network

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

    The proposed methods are based on (more) Shou-Chun, Yin, 1980- 2006-01-01 2 Joint Sizing and Adaptive Independent Gate Control for FinFET Circuits Operating in...

  19. Research Councils UK Joint Vision For Collaborative Training

    E-Print Network [OSTI]

    Berzins, M.

    Research Councils UK Joint Vision For Collaborative Training Objectives: Research Council Collaborative Training will provide doctoral students with a first- rate, challenging research training organisations in the private, public and civil society sectors. Benefits to the student ­ Collaborative Training

  20. Joint Center for Energy Storage Research Beyond Lithium-Ion

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

    Joint Center for Energy Storage Research Beyond Lithium-Ion 2012 2017 USE MULTIPLY-CHARGED IONS STORE ENERGY IN CHEMICAL BONDS STORE ENERGY IN LIQUIDS IN THE NEXT FIVE YEARS AT...

  1. A study of discrete and continuum joint modeling techniques

    SciTech Connect (OSTI)

    Jung, J.; Brown, S.R.

    1992-05-01T23:59:59.000Z

    This paper presents the results of a numerical and experimental study in which finite element and discrete element techniques were used to analyze a layered polycarbonate plate model subjected to uniaxial compression. Also, the two analysis techniques were used to compute the response of an eight meter diameter drift in jointed-rock. The drift was subjected to in-situ and far-field induced thermal stresses. The finite element analyses used a continuum rock model to represent the jointed-rock. A comparison of the analyses showed that the finite element continuum joint model consistently predicted less joint slippage than did the discrete element analyses, although far-field displacements compared well.

  2. United States -- Mexican joint ventures: A case history approach

    SciTech Connect (OSTI)

    Moore, N.L.; Chidester, R.J.; Hughes, K.R.; Fowler, R.A.

    1993-03-01T23:59:59.000Z

    Because the Mexican government has encouraged investment in Mexico by increasing the percentage of ownership of a Mexican business that a US company can hold, joint ventures are more attractive now than they had been in the past. This study provides preliminary information for US renewable energy companies who are interested in forming a joint venture with a Mexican company. This report is not intended to be a complete reference but does identifies a number of important factors that should be observed when forming a Mexican joint venture: (1)Successful joint ventures achieve the goals of each partner. (2)It is essential that all parties agree to the allocation of responsibilities. (3)Put everything in writing. (4)Research in depth the country or countries in which you are considering doing business.

  3. Bioinspired, mechanical, deterministic fractal model for hierarchical suture joints

    E-Print Network [OSTI]

    Boyce, Mary Cunningham

    Many biological systems possess hierarchical and fractal-like interfaces and joint structures that bear and transmit loads, absorb energy, and accommodate growth, respiration, and/or locomotion. In this paper, an elastic ...

  4. announce joint program: Topics by E-print Network

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

    Energy Technologies in Top-down Economic Models Using Bottom-up Information James R. McFarland, John Reilly and Howard J 125 MIT Joint Program on the Science and Policy...

  5. Joint pricing and inventory decision for competitive products

    E-Print Network [OSTI]

    Ye, Kelly (Kelly Yunqing)

    2008-01-01T23:59:59.000Z

    We consider the joint pricing and inventory decision problem for a single retailer who orders, stocks and sells multiple products. The products are competitive in nature, e.g., these maybe similar products from multiple ...

  6. Joint NSRC Workshop 2015: Big, Deep, and Smart Data Analytics...

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

    Venue & access The Joint NSRC Workshop 2015 will be held in Building 8600, Iran Thomas Auditorium, at the Spallation Neutron Source at the Oak Ridge National Laboratory, Oak Ridge,...

  7. Seismic Capacity of Threaded, Brazed, and Grooved Pipe Joints

    Office of Environmental Management (EM)

    SEISMIC CAPACITY OF THREADED, BRAZED AND GROOVED PIPE JOINTS Brent Gutierrez, PhD, PE George Antaki, PE, F.ASME DOE NPH Conference October 25-26, 2011 Motivation * Understand the...

  8. METAMODELS AS INPUT OF AN OPTIMIZATION ALGORITHM FOR SOLVING AN INVERSE EDDY CURRENT TESTING PROBLEM

    E-Print Network [OSTI]

    Boyer, Edmond

    METAMODELS AS INPUT OF AN OPTIMIZATION ALGORITHM FOR SOLVING AN INVERSE EDDY CURRENT TESTING-Curie, 91192 Gif-sur-Yvette, France Abstract A new mean of solution of eddy current testing (ECT) inverse

  9. Inverse Compton scattering from plasma mirror experiment Hai-En Tsai, Joseph Shaw, Xiaoming Wang

    E-Print Network [OSTI]

    Shvets, Gennady

    Inverse Compton scattering from plasma mirror experiment Hai-En Tsai, Joseph Shaw, Xiaoming Wang 1 experiment, we tried to generate inverse Compton x-ray by reflecting driving pulse from plasma mirrors

  10. Mesozoic tectonic inversion in the Neuquen Basin of west-central Argentina

    E-Print Network [OSTI]

    Grimaldi Castro, Gabriel Orlando

    2007-04-25T23:59:59.000Z

    Mesozoic tectonic inversion in the Neuquen Basin of west-central Argentina produced two main fault systems: (1) deep faults that affected basement and syn-rift strata where preexisting faults were selectively reactivated during inversion based...

  11. Structural fabric of the Palisades Monocline: a study of positive inversion, Grand Canyon, Arizona

    E-Print Network [OSTI]

    Orofino, James Cory

    2005-08-29T23:59:59.000Z

    of positive inversion to test model results and improve understanding of inversion processes. The N40W 90 oriented Palisades fault underlying the monocline has experienced northeast-southwest Precambrian extension and subsequent northeastsouthwest Laramide...

  12. An Inverse Finite Element Analysis and A Parametric Study of Small Punch Tests 

    E-Print Network [OSTI]

    Xu, Zhenzhen

    2012-02-14T23:59:59.000Z

    the effects of SPT parameters including friction coefficient, punch head diameter, sample thickness, specimen scale and boundary conditions. The proposed inverse finite element (FE) method improves the accuracy of existing inverse FE methods...

  13. Non-linear inversion modeling for Ultrasound Computer Tomography: transition from soft to hard tissues imaging

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Non-linear inversion modeling for Ultrasound Computer Tomography: transition from soft to hard Marseille cedex 20, France ABSTRACT Ultrasound Computer Tomography (UCT) is an imaging technique which has experiments. Keyword: Ultrasound Computer Tomography, Inverse Born Approximation, Elliptical Projection

  14. An Inverse Finite Element Analysis and A Parametric Study of Small Punch Tests

    E-Print Network [OSTI]

    Xu, Zhenzhen

    2012-02-14T23:59:59.000Z

    the effects of SPT parameters including friction coefficient, punch head diameter, sample thickness, specimen scale and boundary conditions. The proposed inverse finite element (FE) method improves the accuracy of existing inverse FE methods...

  15. The quality assurance of heat fused thermoplastic pipeline joints 

    E-Print Network [OSTI]

    Earles, Larry Lee

    1982-01-01T23:59:59.000Z

    THE QUALITY ASSURANCE OF HEAT FUSED THERMOPLASTIC PIPELINE JOINTS A Thesis by LARRY LEE EARLES Submitted to the Graduate College of Texas A&M University in partial fulfillment for the requirements for the degree of MASTER OF SCIENCE... December 1982 Major Subject: Mechanical Engineering THE QUALITY ASSURANCE OF HEAT FUSED THERMOPLASTIC PIPELINE JOINTS A Thesis LARRY LEE EARLES Approved as to style and content by: Mario A. Colaluca (Chairman of Committee) Carl Gerhold (Member...

  16. An investigation of residual stress in welded joints

    E-Print Network [OSTI]

    Moffat, William Hugh

    1951-01-01T23:59:59.000Z

    . flummery and Conclusions VII. '-. &uggested Procedure for I"uture Investigation 18 o i' VIII. ? . Ppendix IX. Bibliography LIST OP EIGURES Ro. Title Page 1. 'welded Plates snd Gptical Gage Used by Soulton and Martin ~ ~ 6 2. Dr. Rao~s Method... AN INVESTIGATION OF RESIDUAL STRESS IN WELDED JOINTS INTRODUCTION The object of the research reported in this paper was to investigate the magnitude of transverse and longi- tudial residual stress in a welded Joint. These are the stresses in a direction...

  17. An investigation of residual stress in welded joints 

    E-Print Network [OSTI]

    Moffat, William Hugh

    1951-01-01T23:59:59.000Z

    . flummery and Conclusions VII. '-. &uggested Procedure for I"uture Investigation 18 o i' VIII. ? . Ppendix IX. Bibliography LIST OP EIGURES Ro. Title Page 1. 'welded Plates snd Gptical Gage Used by Soulton and Martin ~ ~ 6 2. Dr. Rao~s Method... AN INVESTIGATION OF RESIDUAL STRESS IN WELDED JOINTS INTRODUCTION The object of the research reported in this paper was to investigate the magnitude of transverse and longi- tudial residual stress in a welded Joint. These are the stresses in a direction...

  18. Automatic defect classification of printed wiring board solder joints

    E-Print Network [OSTI]

    Nolan, Daniel J.

    1989-01-01T23:59:59.000Z

    'erent distributions . 23 27 4. 1 Flow chart of inspection process. 29 5. 1 Segmented solder joint. 51 5. 2 Solder joint after edge enhancement and thresholding. 5. 3 Transformation of points on a line. 5. 4 Normal parameterization of s. line. 56 6. 1... works discussing the various benefits of machine recognition of images. Machine vision has been applied in such areas as optical character recognition, satellite image processing, processing of medical images, and automated visual inspection...

  19. Structural testing of the North Wind 250 composite rotor joint

    SciTech Connect (OSTI)

    Musial, W; Link, H [National Renewable Energy Lab., Golden, CO (United States); Coleman, C [Northern Power Systems, Moretown, VT (United States)

    1994-05-01T23:59:59.000Z

    The North Wind 250 wind turbine is under development at Northern Power Systems (NPS) in Moretown, VT. The turbine uses a unique, flow-through, teetered-rotor design. This design eliminates structural discontinuities at the blade/hub interface by fabricating the rotor as one continuous structural element. To accomplish this, the two blade spars are joined at the center of the rotor using a proprietary bonding technique. Fatigue tests were conducted on the full-scale rotor joint at the National Renewable Energy Laboratory (NREL). Subsequent tests are now underway to test the full-scale rotor and hub assembly to verify the design assumptions. The test articles were mounted in dedicated test fixtures. For the joint test, a constant moment was generated across the joint and parent material. Hydraulic actuators applied sinusoidal loading to the test article at levels equivalent to 90% of the extreme wind load for over one million cycles. When the loading was increased to 112% of the extreme wind load, the joint failed by buckling. Strain levels were monitored at 14 locations inside and outside of the blade joint during the test. The tests were used to qualify this critical element of the rotor for field testing and to provide information needed to improve the structural design of the joint.

  20. Iron aluminide alloy coatings and joints, and methods of forming

    DOE Patents [OSTI]

    Wright, R.N.; Wright, J.K.; Moore, G.A.

    1994-09-27T23:59:59.000Z

    Disclosed is a method of joining two bodies together, at least one of the bodies being predominantly composed of metal, the two bodies each having a respective joint surface for joining with the joint surface of the other body, the two bodies having a respective melting point, includes the following steps: (a) providing aluminum metal and iron metal on at least one of the joint surfaces of the two bodies; (b) after providing the aluminum metal and iron metal on the one joint surface, positioning the joint surfaces of the two bodies in juxtaposition against one another with the aluminum and iron positioned therebetween; (c) heating the aluminum and iron on the juxtaposed bodies to a temperature from greater than or equal to 600 C to less than the melting point of the lower melting point body; (d) applying pressure on the juxtaposed surfaces; and (e) maintaining the pressure and the temperature for a time period effective to form the aluminum and iron into an iron aluminide alloy joint which bonds the juxtaposed surfaces and correspondingly the two bodies together. The method can also effectively be used to coat a body with an iron aluminide coating.

  1. Approximating the erfinv function The inverse error function erfinv is a standard component of mathemat-

    E-Print Network [OSTI]

    Giles, Mike

    , and its inverse erfinv(x) are a standard part of libraries such as Intel's MKL, AMD's ACML and NVIDIA

  2. Remote controlled vacuum joint closure mechanism

    DOE Patents [OSTI]

    Doll, D.W.; Hager, E.R.

    1984-02-22T23:59:59.000Z

    A remotely operable and maintainable vacuum joint closure mechanism for a noncircular aperture is disclosed. The closure mechanism includes an extendible bellows coupled at one end to a noncircular duct and at its other end to a flange assembly having sealed grooves for establishing a high vacuum seal with the abutting surface of a facing flange which includes an aperture forming part of the system to be evacuated. A plurality of generally linear arrangements of pivotally coupled linkages and piston combinations are mounted around the outer surface of the duct and aligned along the length thereof. Each of the piston/linkage assemblies is adapted to engage the flange assembly by means of a respective piston and is further coupled to a remote controlled piston drive shaft to permit each of the linkages positioned on a respective flat outer surface of the duct to simultaneously and uniformly displace a corresponding piston and the flange assembly with which it is in contact along the length of the duct in extending the bellows to provide a high vacuum seal between the movable flange and the facing flange. A plurality of latch mechanisms are also pivotally mounted on the outside of the duct. A first end of each of the latch mechanisms is coupled to a remotely controlled latch control shaft for displacing the latch mechanism about its pivot point. In response to the pivoting displacement of the latch mechanism, a second end thereof is displaced so as to securely engage the facing flange and maintain the high vacuum seal established by the displacement of the flange assembly and extension of the bellows without displacing the entire duct.

  3. Persistent Density Perturbations at Rational q Surfaces Following Pellet Injection in the Joint European Torus

    E-Print Network [OSTI]

    Persistent Density Perturbations at Rational q Surfaces Following Pellet Injection in the Joint European Torus

  4. Assessing the Power Requirements for Sawtooth Control in ITER Through Modelling and Joint Experiments

    E-Print Network [OSTI]

    Assessing the Power Requirements for Sawtooth Control in ITER Through Modelling and Joint Experiments

  5. From Use Cases of the Joint European Torus towards Integrated Commissioning Requirements of the ITER Tokamak

    E-Print Network [OSTI]

    From Use Cases of the Joint European Torus towards Integrated Commissioning Requirements of the ITER Tokamak

  6. OBSERBATION OF HIGH INTENSITY X-RAYS IN INVERSE COMPTON SCATTERING EXPERIMENT

    E-Print Network [OSTI]

    OBSERBATION OF HIGH INTENSITY X-RAYS IN INVERSE COMPTON SCATTERING EXPERIMENT S. Kashiwagi, M the first results of high intensity x-ray generation using Inverse Laser Compton scattering. This experiment Synchrotron Source (LSS). It is based on inverse Compton scattering via interaction between pulsed high power

  7. EXPERIMENTAL STUDY OF AXISYMMETRIC INSTABILITY OF INVERSE DEE AND SQUARE TOKAMAK EQUILIBRIA

    E-Print Network [OSTI]

    Sprott, Julien Clinton

    EXPERIMENTAL STUDY OF AXISYMMETRIC INSTABILITY OF INVERSE DEE AND SQUARE TOKAMAK EQUILIBRIA COO Study ofAxi.symmetric !nsta bUity of Inverse Dee and Square Tokamak Equilibria B. Lipschultz, S as a function of time in a tokamak with a 4-null poloidal d ivertor. Inverse dee equilibria are observed

  8. Lipase hydration state in the gas phase: Sorption isotherm measurements and inverse gas chromatography.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Lipase hydration state in the gas phase: Sorption isotherm measurements and inverse gas Rochelle, Cedex 01, France. Keywords: Water, Lipase, Adsorption, Inverse Gas Chromatography, Solid/Gas@univ-lr.fr Fax : +33 5 46 45 82 65 Abbreviations: IGC, Inverse Gas Chromatography aW, water thermodynamic

  9. Radiative inverse seesaw neutrino mass and dark matter

    SciTech Connect (OSTI)

    Guo Gang [INPAC, Department of Physics and Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai Jiao Tong University, Shanghai (China); He Xiaogang [INPAC, Department of Physics and Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai Jiao Tong University, Shanghai (China) and Department of Physics, National Tsing Hua University, and NCTS, Hsinchu, Taiwan (China); Li Guannan [INPAC, Department of Physics and Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai Jiao Tong University, Shanghai, Taiwan (China)

    2013-05-23T23:59:59.000Z

    Seesaw mechanism provides a natural explanation of light neutrino masses through suppression of heavy seesaw scale. In inverse seesaw models the seesaw scale can be much lower than that in the usual seesaw models. If terms inducing seesaw masses are further induced by loop corrections, the seesaw scale can be lowered to be in the range probed by experiments at the LHC without fine tuning. This talk, presented by X-G He, discuss models constructed in a recent preprint by us (arxiv:201207.6308) in which neutrino masses are generated at two loop level through inverse seesaw mechanism. These models also naturally have dark matter candidates. Although the recent data from Xenon100 put stringent constraint on the models, they can be consistent with data on neutrino masses, mixing, dark matter relic density and direct detection.

  10. Inverse free electron laser accelerator for advanced light sources

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

    Duris, J. P.; Musumeci, P.; Li, R. K.

    2012-06-01T23:59:59.000Z

    We discuss the inverse free electron laser (IFEL) scheme as a compact high gradient accelerator solution for driving advanced light sources such as a soft x-ray free electron laser amplifier or an inverse Compton scattering based gamma-ray source. In particular, we present a series of new developments aimed at improving the design of future IFEL accelerators. These include a new procedure to optimize the choice of the undulator tapering, a new concept for prebunching which greatly improves the fraction of trapped particles and the final energy spread, and a self-consistent study of beam loading effects which leads to an energy-efficient high laser-to-beam power conversion.

  11. Evolving Design Rules for the Inverse Granular Packing Problem

    E-Print Network [OSTI]

    Marc Z. Miskin; Heinrich M. Jaeger

    2014-03-17T23:59:59.000Z

    If a collection of identical particles is poured into a container, different shapes will fill to different densities. But what is the shape that fills a container as close as possible to a pre-specified, desired density? We demonstrate a solution to this inverse-packing problem by framing it in the context of artificial evolution. By representing shapes as bonded spheres, we show how shapes may be mutated, simulated, and selected to produce particularly dense or loose packing aggregates, both with and without friction. Moreover, we show how motifs emerge linking these shapes together. The result is a set of design rules that function as an effective solution to the inverse packing problem for given packing procedures and boundary conditions. Finally, we show that these results are verified by experiments on 3D-printed prototypes used to make packings in the real world.

  12. Shot level parallelization of a seismic inversion code using PVM

    SciTech Connect (OSTI)

    Versteeg, R.J.; Gockenback, M.; Symes, W.W. [Rice Univ., Houston, TX (United States); Kern, M. [Inria, Le Chesnay (France)

    1994-12-31T23:59:59.000Z

    This paper presents experience with parallelization using PVM of DSO, a seismic inversion code developed in The Rice Inversion Project. It focuses on one aspect: trying to run efficiently on a cluster of 4 workstations. The authors use a coarse grain parallelism in which they dynamically distribute the shots over the available machines in the cluster. The modeling and migration of their code is parallelized very effectively by this strategy; they have reached a overall performance of 104 Mflops using a configuration of one manager with 3 workers, a speedup of 2.4 versus the serial version, which according to Amdahl`s law is optimal given the current design of their code. Further speedup is currently limited by the non parallelized part of their code optimization, linear algebra and i(o).

  13. Magnetic catalysis and inverse magnetic catalysis in QCD

    E-Print Network [OSTI]

    Niklas Mueller; Jan M. Pawlowski

    2015-02-27T23:59:59.000Z

    We investigate the effects of strong magnetic fields on the QCD phase structure at vanishing density by solving the gluon and quark gap equations, and by studying the dynamics of the quark scattering with the four-fermi coupling. The chiral crossover temperature as well as the chiral condensate are computed. For asymptotically large magnetic fields we find magnetic catalysis, while we find inverse magnetic catalysis for intermediate magnetic fields. Moreover, for large magnetic fields the chiral phase transition for massless quarks turns into a crossover. The underlying mechanisms are then investigated analytically within a few simplifications of the full numerical analysis. We find that a combination of gluon screening effects and the weakening of the strong coupling is responsible for the phenomenon of inverse catalysis. In turn, the magnetic catalysis at large magnetic field is already indicated by simple arguments based on dimensionality.

  14. Inverse transonic wing design on a vector processer

    E-Print Network [OSTI]

    Anderson, William Kyle

    1982-01-01T23:59:59.000Z

    of the flowfield, the new airfoil shape could be calculated from continuity considerations. perhaps the most recent method developed for transonic w' ng design was presented in 1981 by Shanker . This technique is a full potential method which utilizes.... Carlson An inverse transoric wing design method suitable for use on a vec- tor processer is presented. This method is based on the three dimen- sional, full potential flow equation written in conservation fc m. The technique for calculating the airfoil...

  15. Combined approach to the inverse protein folding problem. Final report

    SciTech Connect (OSTI)

    Ruben A. Abagyan

    2000-06-01T23:59:59.000Z

    The main scientific contribution of the project ''Combined approach to the inverse protein folding problem'' submitted in 1996 and funded by the Department of Energy in 1997 is the formulation and development of the idea of the multilink recognition method for identification of functional and structural homologues of newly discovered genes. This idea became very popular after they first announced it and used it in prediction of the threading targets for the CASP2 competition (Critical Assessment of Structure Prediction).

  16. Final Technical Report for "Applied Mathematics Research: Simulation Based Optimization and Application to Electromagnetic Inverse Problems"

    SciTech Connect (OSTI)

    Haber, Eldad

    2014-03-17T23:59:59.000Z

    The focus of research was: Developing adaptive mesh for the solution of Maxwell's equations; Developing a parallel framework for time dependent inverse Maxwell's equations; Developing multilevel methods for optimization problems with inequal- ity constraints; A new inversion code for inverse Maxwell's equations in the 0th frequency (DC resistivity); A new inversion code for inverse Maxwell's equations in low frequency regime. Although the research concentrated on electromagnetic forward and in- verse problems the results of the research was applied to the problem of image registration.

  17. Business Association Joint Task Force Position on Higher Education December 2010 Business Association Joint Task Force Position on Higher Education December 2010 1

    E-Print Network [OSTI]

    Escher, Christine

    Business Association Joint Task Force Position on Higher Education ­ December 2010 Business Association Joint Task Force Position on Higher Education ­ December 2010 1 Joint Business Association Task Force on Higher Education Summary The four business associations, Associated Oregon Industries, Oregon

  18. DOE Joint Genome Institute 2008 Progress Report

    SciTech Connect (OSTI)

    Gilbert, David

    2009-03-12T23:59:59.000Z

    While initially a virtual institute, the driving force behind the creation of the DOE Joint Genome Institute in Walnut Creek, California in the Fall of 1999 was the Department of Energy's commitment to sequencing the human genome. With the publication in 2004 of a trio of manuscripts describing the finished 'DOE Human Chromosomes', the Institute successfully completed its human genome mission. In the time between the creation of the Department of Energy Joint Genome Institute (DOE JGI) and completion of the Human Genome Project, sequencing and its role in biology spread to fields extending far beyond what could be imagined when the Human Genome Project first began. Accordingly, the targets of the DOE JGI's sequencing activities changed, moving from a single human genome to the genomes of large numbers of microbes, plants, and other organisms, and the community of users of DOE JGI data similarly expanded and diversified. Transitioning into operating as a user facility, the DOE JGI modeled itself after other DOE user facilities, such as synchrotron light sources and supercomputer facilities, empowering the science of large numbers of investigators working in areas of relevance to energy and the environment. The JGI's approach to being a user facility is based on the concept that by focusing state-of-the-art sequencing and analysis capabilities on the best peer-reviewed ideas drawn from a broad community of scientists, the DOE JGI will effectively encourage creative approaches to DOE mission areas and produce important science. This clearly has occurred, only partially reflected in the fact that the DOE JGI has played a major role in more than 45 papers published in just the past three years alone in Nature and Science. The involvement of a large and engaged community of users working on important problems has helped maximize the impact of JGI science. A seismic technological change is presently underway at the JGI. The Sanger capillary-based sequencing process that dominated how sequencing was done in the last decade is being replaced by a variety of new processes and sequencing instruments. The JGI, with an increasing number of next-generation sequencers, whose throughput is 100- to 1,000-fold greater than the Sanger capillary-based sequencers, is increasingly focused in new directions on projects of scale and complexity not previously attempted. These new directions for the JGI come, in part, from the 2008 National Research Council report on the goals of the National Plant Genome Initiative as well as the 2007 National Research Council report on the New Science of Metagenomics. Both reports outline a crucial need for systematic large-scale surveys of the plant and microbial components of the biosphere as well as an increasing need for large-scale analysis capabilities to meet the challenge of converting sequence data into knowledge. The JGI is extensively discussed in both reports as vital to progress in these fields of major national interest. JGI's future plan for plants and microbes includes a systematic approach for investigation of these organisms at a scale requiring the special capabilities of the JGI to generate, manage, and analyze the datasets. JGI will generate and provide not only community access to these plant and microbial datasets, but also the tools for analyzing them. These activities will produce essential knowledge that will be needed if we are to be able to respond to the world's energy and environmental challenges. As the JGI Plant and Microbial programs advance, the JGI as a user facility is also evolving. The Institute has been highly successful in bending its technical and analytical skills to help users solve large complex problems of major importance, and that effort will continue unabated. The JGI will increasingly move from a central focus on 'one-off' user projects coming from small user communities to much larger scale projects driven by systematic and problem-focused approaches to selection of sequencing targets. Entire communities of scientists working in a particular field, such as feeds

  19. DOD-DOE Workshop on Joint Energy Activities

    SciTech Connect (OSTI)

    None

    1980-01-01T23:59:59.000Z

    The general conditions for DOD-DOE interactions were delineated in an October 1978, Memorandum of Understanding (MOU) that identified two basic goals: improving energy efficiency and availability within DOD, and utilizing DOD and DOE expertise and facilities to carry out projects of mutual interest. There has been considerable interaction between DOD and DOE, including a number of proposed joint initiatives but a systematic and coordinated approach for nurturing, maintaining, and expanding these relationships has not been developed. A DOD-DOE Workshop on Joint Energy Activities was held on March 10-12, 1980. The workshop was structured into five working groups - Mobility Fuels, Conservation, Fossil Fuels for Fixed Facilities, Solar and Renewable Energy Sources, and Special Projects - with DOD and DOE cochairmen for each. Over a hundred DOD and DOE management, program, and policymaking representatives were brought together by the workshop Steering Committee to identify specific programs for inclusion in an overall plan for implementing the MOU and to deal with fundamental issues and problems of maintaining future communications. The workshop accomplished its goals, these being to: (1) improve communication among the appropriate key DOD and DOE personnel at all levels and promote information exchange; (2) review ongoing and already-proposed joint DOD and DOE programs; (3) initiate a coordinated, systematic effort to establish joint DOD-DOE energy-security programs; and (4) propose specific programs and projects of mutual interest for inclusion in a follow-on joint-implementation plan.

  20. Joint estimation of phase and phase diffusion for quantum metrology

    E-Print Network [OSTI]

    Mihai D. Vidrighin; Gaia Donati; Marco G. Genoni; Xian-Min Jin; W. Steven Kolthammer; M. S. Kim; Animesh Datta; Marco Barbieri; Ian A. Walmsley

    2014-10-20T23:59:59.000Z

    Phase estimation, at the heart of many quantum metrology and communication schemes, can be strongly affected by noise, whose amplitude may not be known, or might be subject to drift. Here, we investigate the joint estimation of a phase shift and the amplitude of phase diffusion, at the quantum limit. For several relevant instances, this multiparameter estimation problem can be effectively reshaped as a two-dimensional Hilbert space model, encompassing the description of an interferometer phase probed with relevant quantum states -- split single-photons, coherent states or N00N states. For these cases, we obtain a trade-off bound on the statistical variances for the joint estimation of phase and phase diffusion, as well as optimum measurement schemes. We use this bound to quantify the effectiveness of an actual experimental setup for joint parameter estimation for polarimetry. We conclude by discussing the form of the trade-off relations for more general states and measurements.

  1. Joint U.S./Russian plutonium disposition study: Nonproliferation issues

    SciTech Connect (OSTI)

    Jaeger, C. [Sandia National Labs., Albuquerque, NM (United States); Erkkila, B.; Fearey, B. [Los Alamos National Lab., NM (United States); Ehinger, M. [Oak Ridge National Lab., TN (United States); McAllister, S. [Lawrence Livermore National Lab., CA (United States); Chitaykin, V. [Inst. of Physics and Power Engineering, Obninsk (Russian Federation); Ptashny, V. [Inst. of Technical Physics, Snezhinsk (Russian Federation)

    1996-07-01T23:59:59.000Z

    In an effort to establish joint activities in the disposition of fissile materials from nuclear materials, the US and Russia agreed to conduct joint work to develop consistent comparisons of various alternatives for the disposition of weapons-grade plutonium. Joint working groups were established for the analysis of alternatives for plutonium management for water reactors, fast reactors, storage, geological formations, immobilization and stabilization of solutions and other forms. In addition cross-cutting working groups were established for economic analysis and nonproliferation (NP). This paper reviews the activities of the NP working group in support of these studies. The NP working group provided integrated support in the area of nuclear NP to the other US/Russian Study teams. It involved both domestic safeguards and security and international safeguards. The analysis of NP involved consideration of the resistance to theft or diversion and resistance to retrieval, extraction or reuse.

  2. Joint Institute for Computational Sciences | ornl.gov

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron beamJoin HERO Mariners vs.JointJoint Institute for

  3. Joint Institute for Neutron Sciences | ornl.gov

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron beamJoin HERO Mariners vs.JointJoint Institute

  4. Identifying Isotropic Events Using a Regional Moment Tensor Inversion

    SciTech Connect (OSTI)

    Ford, S R; Dreger, D S; Walter, W R

    2008-11-04T23:59:59.000Z

    We calculate the deviatoric and isotropic source components for 17 explosions at the Nevada Test Site, as well as 12 earthquakes and 3 collapses in the surrounding region of the western US, using a regional time-domain full waveform inversion for the complete moment tensor. The events separate into specific populations according to their deviation from a pure double-couple and ratio of isotropic to deviatoric energy. The separation allows for anomalous event identification and discrimination between explosions, earthquakes, and collapses. Confidence regions of the model parameters are estimated from the data misfit by assuming normally distributed parameter values. We investigate the sensitivity of the resolved parameters of an explosion to imperfect Earth models, inaccurate event depths, and data with low signal-to-noise ratio (SNR) assuming a reasonable azimuthal distribution of stations. In the band of interest (0.02-0.10 Hz) the source-type calculated from complete moment tensor inversion is insensitive to velocity models perturbations that cause less than a half-cycle shift (<5 sec) in arrival time error if shifting of the waveforms is allowed. The explosion source-type is insensitive to an incorrect depth assumption (for a true depth of 1 km), and the goodness-of-fit of the inversion result cannot be used to resolve the true depth of the explosion. Noise degrades the explosive character of the result, and a good fit and accurate result are obtained when the signal-to-noise ratio (SNR) is greater than 5. We assess the depth and frequency dependence upon the resolved explosive moment. As the depth decreases from 1 km to 200 m, the isotropic moment is no longer accurately resolved and is in error between 50-200%. However, even at the most shallow depth the resultant moment tensor is dominated by the explosive component when the data have a good SNR.

  5. Identifying isotropic events using a regional moment tensor inversion

    SciTech Connect (OSTI)

    Ford, S R; Dreger, D S; Walter, W R

    2008-07-16T23:59:59.000Z

    The deviatoric and isotropic source components for 17 explosions at the Nevada Test Site, as well as 12 earthquakes and 3 collapses in the surrounding region of the western US, are calculated using a regional time-domain full waveform inversion for the complete moment tensor. The events separate into specific populations according to their deviation from a pure double-couple and ratio of isotropic to deviatoric energy. The separation allows for anomalous event identification and discrimination between explosions, earthquakes, and collapses. Confidence regions of the model parameters are estimated from the data misfit by assuming normally distributed parameter values. We investigate the sensitivity of the resolved parameters of an explosion to imperfect Earth models, inaccurate event depths, and data with a low signal-to-noise ratio (SNR) assuming a reasonable azimuthal distribution of stations. In the band of interest (0.02-0.10 Hz) the source-type calculated from complete moment tensor inversion is insensitive to velocity models perturbations that cause less than a half-cycle shift (<5 sec) in arrival time error if shifting of the waveforms is allowed. The explosion source-type is insensitive to an incorrect depth assumption (for a true depth of 1 km), but the goodness-of-fit of the inversion result cannot be used to resolve the true depth of the explosion. Noise degrades the explosive character of the result, and a good fit and accurate result are obtained when the signal-to-noise ratio (SNR) is greater than 5. We assess the depth and frequency dependence upon the resolved explosive moment. As the depth decreases from 1 km to 200 m, the isotropic moment is no longer accurately resolved and is in error between 50-200%. However, even at the most shallow depth the resultant moment tensor is dominated by the explosive component when the data has a good SNR. The sensitivity investigation is extended via the introduction of the network sensitivity solution, which takes into account the unique station distribution, frequency band, and SNR of a given test scenario. An example of this analysis is presented for the North Korea test, which shows that in order to constrain the explosive component one needs a certain station configuration. In the future we will analyze the bias in the source-type parameters due to error in the Green's function by incorporating a suite of suitable velocity models in the inversion.

  6. The equivalence of inverse Compton scattering and the undulator concept

    SciTech Connect (OSTI)

    Ng, K.Y,; /Fermilab

    2009-08-01T23:59:59.000Z

    Inverse Compton scattering is a method to produce very high frequency photon beam. However, the production mechanism can also be viewed as a undulator emission. This is because the electron sees electric and magnetic fields of the incident laser beam and is driven into transverse oscillatory motion in exactly the same way when the electron passes through a undulator consisting of alternating magnetic field. This note gives a detailed examination of the similarity about the two views. Equivalent undulator parameters are derived for the incident laser beam, as well as the differential cross section of photon emission.

  7. Proton inelastic scattering on {sup 56}Ni in inverse kinematics

    SciTech Connect (OSTI)

    Kraus, G.; Egelhof, P.; Fischer, C.; Geissel, H.; Himmler, A.; Nickel, F.; Muenzenberg, G.; Schwab, W.; Weiss, A. [GSI, Darmstadt (Germany); Chulkov, L.; Golovkov, M.; Ogloblin, A. [I.V. Kurchatov Inst., Moscow (Russian Federation); Friese, J.; Gillitzer, A.; Koerner, H.J.; Peter, M. [TU, Munich (Germany); Henning, W.; Schiffer, J.P. [Argonne National Lab., IL (United States); Kratz, J.V. [Univ. of Mainz (Germany)

    1993-10-01T23:59:59.000Z

    Inelastic proton scattering to the first excited 2{sup +} state at 2.701 MeV in doubly magic {sup 56}Ni was studied at 101 MeV/u in inverse kinematics. The radioactive {sup 56}Ni ion beam was obtained from the SIS heavy ion synchrotron at GSI Darmstadt via fragmentation of a {sup 58}Ni beam, and separation by the fragment separator (FRS). A value B(E2, 0{sup +} {yields} 2{sup +}) = 600 {+-} 120 e{sup 2} fm{sup 4} was obtained which corresponds to a deformation parameter {beta} ({sup 56}Ni) = 0.173 {+-} 0.017.

  8. A Double Cryptography Using The Smarandache Keedwell Cross Inverse Quasigroup

    E-Print Network [OSTI]

    Temitope Gbolahan Jaiyeola

    2009-03-10T23:59:59.000Z

    The present study further strengthens the use of the Keedwell CIPQ against attack on a system by the use of the Smarandache Keedwell CIPQ for cryptography in a similar spirit in which the cross inverse property has been used by Keedwell. This is done as follows. By constructing two S-isotopic S-quasigroups(loops) $U$ and $V$ such that their Smarandache automorphism groups are not trivial, it is shown that $U$ is a SCIPQ(SCIPL) if and only if $V$ is a SCIPQ(SCIPL). Explanations and procedures are given on how these SCIPQs can be used to double encrypt information.

  9. Optical inverse Compton emission from clusters of galaxies

    E-Print Network [OSTI]

    Yamazaki, Ryo

    2015-01-01T23:59:59.000Z

    Shocks around clusters of galaxies accelerate electrons which upscatter the Cosmic Microwave Background photons to higher-energies. We use an analytical model to calculate this inverse Compton (IC) emission, taking into account the effects of additional energy losses via synchrotron and Coulomb scattering. We find that the surface brightness of the optical IC emission increases with redshift and halo mass. The IC emission surface brightness, 32--34~mag~arcsec$^{-2}$, for massive clusters is potentially detectable by the newly developed Dragonfly Telephoto Array.

  10. Sneutrino inflation in supersymmetric B - L with inverse seesaw

    SciTech Connect (OSTI)

    Khalil, Shaaban; Sil, Arunansu [Centre for Theoretical Physics, Zewail City of Science and Technology, Sheikh Zayed, 12588, Giza (Egypt); Department of Mathematics, Faculty of Science, Ain Shams University, Cairo, 11566 (Egypt); Department of Physics, Indian Institute of Technology, Guwahati, Assam 781039 (India)

    2012-07-27T23:59:59.000Z

    We have shown that inflation in the supersymmetric B - L extension of the Standard Model can be realized where one of the associated right-handed sneutrinos can provide a non-trivial inflationary trajectory at tree level (hence breaking B - L during inflation). As soon as the inflation ends, the right-handed sneutrino falls into the supersymmetric vacuum, with a vanishing vacuum expectation value, so that B - L symmetry is restored. The B - L gauge symmetry will be radiatively broken at a TeV scale and light neutrino masses are generated through the inverse seesaw mechanism.

  11. Seismic Attenuation Inversion with t* Using tstarTomog.

    SciTech Connect (OSTI)

    Preston, Leiph

    2014-09-01T23:59:59.000Z

    Seismic attenuation is defined as the loss of the seismic wave amplitude as the wave propagates excluding losses strictly due to geometric spreading. Information gleaned from seismic waves can be utilized to solve for the attenuation properties of the earth. One method of solving for earth attenuation properties is called t*. This report will start by introducing the basic theory behind t* and delve into inverse theory as it pertains to how the algorithm called tstarTomog inverts for attenuation properties using t* observations. This report also describes how to use the tstarTomog package to go from observed data to a 3-D model of attenuation structure in the earth.

  12. Center for Inverse Design: Principal Investigators in the Center for

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWPSuccess StoriesFebruaryMetalControlInverse Design Principal

  13. Center for Inverse Design: Research Thrusts and Subtasks

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWPSuccess StoriesFebruaryMetalControlInverse Design

  14. Center for Inverse Design poster for EFRC Summit, May 2011

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMForms About Batteriesmetal-organic frameworks EFRC 1001 wordInverse

  15. Joint ECE/PLI Seminar Title: Innovation Growth and Renewal

    E-Print Network [OSTI]

    Joint ECE/PLI Seminar Title: Innovation ­ Growth and Renewal Speaker: Chris Christopher, ECE, business plan development, operations, and executive coaching. He is currently engaged in a management, desktop computer software, operating systems, languages and graphics. He was born in Greece, where he

  16. 32 ISSP Activity Report 2009 Highlights of Joint Research

    E-Print Network [OSTI]

    Katsumoto, Shingo

    32 ISSP Activity Report 2009 Highlights of Joint Research Synchrotron Radiation Laboratory radiation. The operation time of these beamlines are about 4000 hours and the number of users is more than performance computing environment. In particular, the SCC selectively promotes and supports large

  17. LIBRARY PARTITIONING FOR TARGET DETECTION IN JOINT CONTAMINATED SURFACE DETECTOR

    E-Print Network [OSTI]

    Adali, Tulay

    that is present from the given library. For a hypothesis testing problem, there are two types of statistical error in the given library present in the mixtures; Type II error, also known as a false negative, is the errorLIBRARY PARTITIONING FOR TARGET DETECTION IN JOINT CONTAMINATED SURFACE DETECTOR Wei Wang and T

  18. Joint estimation of attenuation and emission images from PET scans

    E-Print Network [OSTI]

    Fessler, Jeffrey A.

    Joint estimation of attenuation and emission images from PET scans Hakan Erdogan and Jeffrey A Motivation · Attenuation correction needed for quantitatively accurate PET · Post-injection transmission scans necessitated by whole-body PET Inject (in waiting room) Radioisotope Uptake 40-60 minutes 10

  19. Network Coding for Joint Storage and Transmission with Minimum Cost

    E-Print Network [OSTI]

    Jiang, Anxiao "Andrew"

    transmission and data storage in networks. Its power comes from the improved flexibility that codeword symbolsNetwork Coding for Joint Storage and Transmission with Minimum Cost Anxiao (Andrew) Jiang@cs.tamu.edu. Abstract-- Network coding provides elegant solutions to many data transmission problems. The usage

  20. ENGINEERING PHYSICS An Interdisciplinary Program Jointly Offered by the

    E-Print Network [OSTI]

    Lozano-Robledo, Alvaro

    ENGINEERING PHYSICS An Interdisciplinary Program Jointly Offered by the School of Engineering in engineering fundamentals, but also an understanding of the physical principles of the underlying mechanisms is required. The goal of the Engineering Physics Program is to offer students a solid background