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Sample records for group geophysical techniques

  1. Geophysical Techniques | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePowerEdistoWhiskeyFootprintGEXAGeminiEnergyHawaii |Methods JumpTechniques Jump

  2. Category:Geophysical Techniques | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmentalBowerbank,CammackFLIR Jump to: navigation, searchGeophysical Techniques Jump to:

  3. PhD in Cryosphere Geophysics The Cryosphere Geophysics and Remote Sensing group (CryoGARs) at Boise

    E-Print Network [OSTI]

    Barrash, Warren

    PhD in Cryosphere Geophysics The Cryosphere Geophysics and Remote Sensing group (CryoGARs) at Boise on the GrIS. A solid background in field geophysics is preferred. The successful applicant will join the CryoGars group and Center for Geophysical Investigation of the Shallow Subsurface (CGISS) at Boise

  4. Journal of Life Sciences 6 (2012) 335-341 The International Research Group in Geophysics Europe

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    2012-01-01

    Journal of Life Sciences 6 (2012) 335-341 The International Research Group in Geophysics Europe to create the IRGGEA (International Group in Geophysics Europe Africa) in order to pursue the scientific: Scientific network, ethical rules, geophysics, sustainable research, Africa. 1. Introduction

  5. Geophysical Techniques for Monitoring CO2 Movement During Sequestration

    SciTech Connect (OSTI)

    Erika Gasperikova; G. Michael Hoversten

    2005-11-15

    The relative merits of the seismic, gravity, and electromagnetic (EM) geophysical techniques are examined as monitoring tools for geologic sequestration of carbon dioxide (CO{sub 2}). This work does not represent an exhaustive study, but rather demonstrates the capabilities of a number of geophysical techniques for two synthetic modeling scenarios. The first scenario represents combined CO{sub 2} enhanced oil recovery (EOR) and sequestration in a producing oil field, the Schrader Bluff field on the north slope of Alaska, USA. EOR/sequestration projects in general and Schrader Bluff in particular represent relatively thin injection intervals with multiple fluid components (oil, hydrocarbon gas, brine, and CO{sub 2}). This model represents the most difficult end member of a complex spectrum of possible sequestration scenarios. The time-lapse performance of seismic, gravity, and EM techniques are considered for the Schrader Bluff model. The second scenario is a gas field that in general resembles conditions of Rio Vista reservoir in the Sacramento Basin of California. Surface gravity, and seismic measurements are considered for this model.

  6. GEOPHYSICS

    E-Print Network [OSTI]

    Volume 51. April 1986. Number 4. GEOPHYSICS. P-SV wave propagation in heterogeneous medla: Velocity-stress ?nite-difference method. Jean Virieux*.

  7. Assessment of various geophysical techniques for Plains Indian archaeological site investigations 

    E-Print Network [OSTI]

    Klaff, Tamir Lee

    1993-01-01

    selected along the banks of Lake Sharpe, South Dakota for surveying. These sites were surveyed using geophysical techniques identified as having the most potential to rapidly locate anomalies characteristic of buried archaeological features, ground...

  8. Geophysical technique for mineral exploration and discrimination based on electromagnetic methods and associated systems

    DOE Patents [OSTI]

    Zhdanov; Michael S. (Salt Lake City, UT)

    2008-01-29

    Mineral exploration needs a reliable method to distinguish between uneconomic mineral deposits and economic mineralization. A method and system includes a geophysical technique for subsurface material characterization, mineral exploration and mineral discrimination. The technique introduced in this invention detects induced polarization effects in electromagnetic data and uses remote geophysical observations to determine the parameters of an effective conductivity relaxation model using a composite analytical multi-phase model of the rock formations. The conductivity relaxation model and analytical model can be used to determine parameters related by analytical expressions to the physical characteristics of the microstructure of the rocks and minerals. These parameters are ultimately used for the discrimination of different components in underground formations, and in this way provide an ability to distinguish between uneconomic mineral deposits and zones of economic mineralization using geophysical remote sensing technology.

  9. Estimating the hydraulic conductivity at the South Oyster Site from geophysical tomographic data using Bayesian techniques

    E-Print Network [OSTI]

    Hubbard, Susan

    of ground penetrating radar (GPR) tomographic velocity, GPR tomographic attenuation, and seismic tomographic where prior information is limited. Among the geophysical data, GPR and seismic velocity are more useful in situ hydrological measurements. Conventional borehole techniques such as flowmeter and slug tests

  10. Inverse Modeling and Geostatistics Project 17/04/2008DTU Geophysics research group meeting -2010-05-052 DTU Informatics, Technical University of Denmark

    E-Print Network [OSTI]

    Mosegaard, Klaus

    Inverse Modeling and Geostatistics Project #12;17/04/2008DTU Geophysics research group meeting Geophysics research group meeting - 2010-05-053 DTU Informatics, Technical University of Denmark Bayesian PROBLEM? #12;17/04/2008DTU Geophysics research group meeting - 2010-05-054 DTU Informatics, Technical

  11. Inverse Modeling and Geostatistics Project 17/04/2008DTU Geophysics research group meeting -2010-09-102 DTU Informatics, Technical University of Denmark

    E-Print Network [OSTI]

    Mosegaard, Klaus

    Inverse Modeling and Geostatistics Project #12;17/04/2008DTU Geophysics research group meetingModelingandGeostatisticsProject #12;17/04/2008DTU Geophysics research group meeting - 2010-09-103 DTU Informatics, Technical #12;17/04/2008DTU Geophysics research group meeting - 2010-09-105 DTU Informatics, Technical

  12. Use of Geophysical Techniques to Characterize Fluid Flow in a Geothermal Reservoir

    Broader source: Energy.gov [DOE]

    Project objectives: Joint inversion of geophysical data for ground water flow imaging; Reduced the cost in geothermal exploration and monitoring; & Combined passive and active geophysical methods.

  13. Karst characterization in a semi-arid region using gravity, seismic, and resistivity geophysical techniques.

    SciTech Connect (OSTI)

    Barnhart, Kevin Scott

    2013-10-01

    We proposed to customize emerging in situ geophysical monitoring technology to generate time-series data during sporadic rain events in a semi-arid region. Electrodes were to be connected to wireless %5Cnodes%22 which can be left in the eld for many months. Embedded software would then increase sampling frequency during periods of rainfall. We hypothesized that this contrast between no-volume ow in karst passageways dur- ing dry periods and partial- or saturated-volume ow during a rain event is detectable by these Wireless Sensor Network (WSN) geophysical nodes, we call this a Wireless Resistivity Network (WRN). The development of new methodologies to characterize semi-arid karst hydrology is intended to augment Sandia National Laboratorys mission to lead e orts in energy technologies, waste disposal and climate security by helping to identify safe and secure regions and those that are at risk. Development and initial eld testing identi ed technological barriers to using WRNs for identifying semi-arid karst, exposing R&D which can be targeted in the future. Gravity, seismic, and resis- tivity surveys elucidated how each technique might e ectively be used to characterize semi-arid karst. This research brings to light the importance and challenges with char- acterizing semi-arid karst through a multi-method geophysical study. As there have been very few studies with this emphasis, this study has expanded the body of practical experience needed to protect the nations water and energy security interests.

  14. Estimating the hydraulic conductivity at the South Oyster Site from geophysical tomographic data using Bayesian techniques

    E-Print Network [OSTI]

    Chen, Jinsong

    Estimating the hydraulic conductivity at the South Oyster Site from geophysical tomographic data velocity for hydraulic conductivity estimation at the South Oyster Site, using a Bayesian framework. Since site- specific relations between hydraulic conductivity and geophysical properties are often nonlinear

  15. Fermionic renormalization group flows Technique and Theory

    E-Print Network [OSTI]

    Heermann, Dieter W.

    of the differential equations for Wilson's renormalization group for the one­particle­irreducible Green functions, such as the projection to the Fermi surface and the calculation of susceptibilities. #12;1 Introduction Renormalization integration corresponding to the grand canonical trace as an iterated integral over degrees of freedom

  16. A Hybrid Hydrologic-Geophysical Inverse Technique for the Assessment and Monitoring of Leachates in the Vadose Zone

    SciTech Connect (OSTI)

    ALUMBAUGH,DAVID L.; YEH,JIM; LABRECQUE,DOUG; GLASS,ROBERT J.; BRAINARD,JAMES; RAUTMAN,CHRIS

    1999-06-15

    The objective of this study is to develop and field test a new, integrated Hybrid Hydrologic-Geophysical Inverse Technique (HHGIT) for characterization of the vadose zone at contaminated sites. This new approach to site characterization and monitoring can provide detailed maps of hydrogeological heterogeneity and the extent of contamination by combining information from 3D electric resistivity tomography (ERT) and/or 2D cross borehole ground penetrating radar (XBGPR) surveys, statistical information about heterogeneity and hydrologic processes, and sparse hydrologic data. Because the electrical conductivity and dielectric constant of the vadose zone (from the ERT and XBGPR measurements, respectively) can be correlated to the fluid saturation and/or contaminant concentration, the hydrologic and geophysical measurements are related.

  17. WEST COAST REGIONAL CARBON SEQUESTRATION PARTNERSHIP - REPORT ON GEOPHYSICAL TECHNIQUES FOR MONITORING CO2 MOVEMENT DURING SEQUESTRATION

    SciTech Connect (OSTI)

    Gasperikova, Erika; Gasperikova, Erika; Hoversten, G. Michael

    2005-10-01

    The relative merits of the seismic, gravity, and electromagnetic (EM) geophysical techniques are examined as monitoring tools for geologic sequestration of CO{sub 2}. This work does not represent an exhaustive study, but rather demonstrates the capabilities of a number of geophysical techniques on two synthetic modeling scenarios. The first scenario represents combined CO{sub 2} enhance oil recovery (EOR) and sequestration in a producing oil field, the Schrader Bluff field on the north slope of Alaska, USA. EOR/sequestration projects in general and Schrader Bluff in particular represent relatively thin injection intervals with multiple fluid components (oil, hydrocarbon gas, brine, and CO{sub 2}). This model represents the most difficult end member of a complex spectrum of possible sequestration scenarios. The time-lapse performance of seismic, gravity, and EM techniques are considered for the Schrader Bluff model. The second scenario is a gas field that in general resembles conditions of Rio Vista reservoir in the Sacramento Basin of California. Surface gravity, and seismic measurements are considered for this model.

  18. Advisory Group On The Application Of Nuclear Techniques To Geothermal...

    Open Energy Info (EERE)

    Advisory Group On The Application Of Nuclear Techniques To Geothermal Studies-Meeting In Pisa 8-12 Sep 1975 Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  19. DETECTION OF HISTORICAL PIPELINE LEAK PLUMES USING NON-INTRUSIVE SURFACE-BASED GEOPHYSICAL TECHNIQUES AT THE HANFORD NUCLEAR SITE WASHINGTON USA

    SciTech Connect (OSTI)

    SKORSKA MB; FINK JB; RUCKER DF; LEVITT MT

    2010-12-02

    Historical records from the Department of Energy Hanford Nuclear Reservation (in eastern WA) indicate that ruptures in buried waste transfer pipelines were common between the 1940s and 1980s, which resulted in unplanned releases (UPRs) of tank: waste at numerous locations. A number of methods are commercially available for the detection of active or recent leaks, however, there are no methods available for the detection of leaks that occurred many years ago. Over the decades, leaks from the Hanford pipelines were detected by visual observation of fluid on the surface, mass balance calculations (where flow volumes were monitored), and incidental encounters with waste during excavation or drilling. Since these detection methods for historic leaks are so limited in resolution and effectiveness, it is likely that a significant number of pipeline leaks have not been detected. Therefore, a technology was needed to detect the specific location of unknown pipeline leaks so that characterization technologies can be used to identify any risks to groundwater caused by waste released into the vadose zone. A proof-of-concept electromagnetic geophysical survey was conducted at an UPR in order to image a historical leak from a waste transfer pipeline. The survey was designed to test an innovative electromagnetic geophysical technique that could be used to rapidly map the extent of historical leaks from pipelines within the Hanford Site complex. This proof-of-concept test included comprehensive testing and analysis of the transient electromagnetic method (TEM) and made use of supporting and confirmatory geophysical methods including ground penetrating radar, magnetics, and electrical resistivity characterization (ERC). The results for this initial proof-of-concept test were successful and greatly exceeded the expectations of the project team by providing excellent discrimination of soils contaminated with leaked waste despite the interference from an electrically conductive pipe.

  20. Results of Tank-Leak Detection Demonstration Using Geophysical Techniques at the Hanford Mock Tank Site-Fiscal Year 2001

    SciTech Connect (OSTI)

    Barnett, D BRENT.; Gee, Glendon W.; Sweeney, Mark D.

    2002-03-01

    During July and August of 2001, Pacific Northwest National Laboratory (PNNL), hosted researchers from Lawrence Livermore and Lawrence Berkeley National laboratories, and a private contractor, HydroGEOPHYSICS, Inc., for deployment of the following five geophysical leak-detection technologies at the Hanford Site Mock Tank in a Tank Leak Detection Demonstration (TLDD): (1) Electrical Resistivity Tomography (ERT); (2) Cross-Borehole Electromagnetic Induction (CEMI); (3) High-Resolution Resistivity (HRR); (4) Cross-Borehole Radar (XBR); and (5) Cross-Borehole Seismic Tomography (XBS). Under a ''Tri-party Agreement'' with Federal and state regulators, the U.S. Department of Energy will remove wastes from single-shell tanks (SSTs) and other miscellaneous underground tanks for storage in the double-shell tank system. Waste retrieval methods are being considered that use very little, if any, liquid to dislodge, mobilize, and remove the wastes. As additional assurance of protection of the vadose zone beneath the SSTs, tank wastes and tank conditions may be aggressively monitored during retrieval operations by methods that are deployed outside the SSTs in the vadose zone.

  1. Jiaozuo Coal Group Hejing Technique Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EAInvervar Hydro Jump to:Huilun SolarLongjiangJiaozuo Coal Group Hejing

  2. Numerical Simulation in Applied Geophysics. From the Mesoscale to ...

    E-Print Network [OSTI]

    Seismic wave propagation is a common technique used in hydrocarbon exploration geophysics, mining and reservoir characterization and production.

  3. Course: Numerical Simulation in Applied Geophysics. From the ...

    E-Print Network [OSTI]

    2013-10-09

    Seismic wave propagation is a common technique used in hydrocarbon explo- ration geophysics, mining and reservoir characterization and production.

  4. ESTIMATING UNCERTAINTIES FOR GEOPHYSICAL

    E-Print Network [OSTI]

    Kreinovich, Vladik

    to directly measure the amount of oil in an area is to drill several wells, but drilling is a very expensive. These techniques are applied to the inversion of traveltime data collected in a cross well seismic experiment procedure, and the whole idea of geophysics is to predict the amount of oil without drilling in all possible

  5. Asteroid Surface Geophysics

    E-Print Network [OSTI]

    Murdoch, Naomi; Schwartz, Stephen R; Miyamoto, Hideaki

    2015-01-01

    The regolith-covered surfaces of asteroids preserve records of geophysical processes that have occurred both at their surfaces and sometimes also in their interiors. As a result of the unique micro-gravity environment that these bodies posses, a complex and varied geophysics has given birth to fascinating features that we are just now beginning to understand. The processes that formed such features were first hypothesised through detailed spacecraft observations and have been further studied using theoretical, numerical and experimental methods that often combine several scientific disciplines. These multiple approaches are now merging towards a further understanding of the geophysical states of the surfaces of asteroids. In this chapter we provide a concise summary of what the scientific community has learned so far about the surfaces of these small planetary bodies and the processes that have shaped them. We also discuss the state of the art in terms of experimental techniques and numerical simulations that...

  6. A hybrid hydrologic-geophysical inverse technique for the assessment and monitoring of leachates in the vadose zone. 1998 annual progress report

    SciTech Connect (OSTI)

    Alumbaugh, D.L.; Glass, R.J.; Yeh, T.C.; LaBrecque, D.

    1998-06-01

    'The objective of this study is to develop and field test a new, integrated Hybrid Hydrologic-Geophysical Inverse Technique (HHGIT) for characterization of the vadose zone at contaminated sites. This new approach to site characterization and monitoring can provide detailed maps of hydrogeological heterogeneity and the extent of contamination by combining information from electric resistivity tomography (ERT) surveys, statistical information about heterogeneity and hydrologic processes, and sparse hydrologic data. Because the electrical conductivity of the vadose zone (from the ERT measurements) can be correlated to the fluid saturation and/or contaminant concentration, the hydrologic and geophysical measurements are related. As of the 21st month of a 36-month project, a three-dimensional stochastic hydrologic inverse model for heterogeneous vadose zones has been developed. This model employs pressure and moisture content measurements under both transient and steady flow conditions to estimate unsaturated hydraulic parameters. In this model, an innovative approach to sequentially condition the estimate using temporal measurements has been incorporated. This allows us to use vast amounts of pressure and moisture content information measured at different times while keeping the computational effort manageable. Using this model the authors have found that the relative importance of the pressure and moisture content measurements in defining the different vadose zone parameters depends on whether the soil is wet or dry. They have also learned that pressure and moisture content measurements collected during steady state flow provide the best characterization of heterogeneity compared to other types of hydrologic data. These findings provide important guidance to the design of sampling scheme of the field experiment described below.'

  7. COMBINED GEOPHYSICAL INVESTIGATION TECHNIQUES TO IDENTIFY BURIED WASTE IN AN UNCONTROLLED LANDFILL AT THE PADUCAH GASEOUS DIFFUSION PLANT, KENTUCKY

    SciTech Connect (OSTI)

    Miller, Peter T.; Starmer, R. John

    2003-02-27

    The primary objective of the investigation was to confirm the presence and determine the location of a cache of 30 to 60 buried 55-gallon drums that were allegedly dumped along the course of the pre-existing, northsouth diversion ditch (NSDD) adjacent to permitted landfills at the Paducah Gaseous Diffusion Plant, Kentucky. The ditch had been rerouted and was being filled and re-graded at the time of the alleged dumping. Historic information and interviews with individuals associated with alleged dumping activities indicated that the drums were dumped prior to the addition of other fill materials. In addition, materials alleged to have been dumped in the ditch, such as buried roofing materials, roof flashing, metal pins, tar substances, fly ash, and concrete rubble complicated data interpretation. Some clean fill materials have been placed over the site and graded. This is an environment that is extremely complicated in terms of past waste dumping activities, construction practices and miscellaneous landfill operations. The combination of site knowledge gained from interviews and research of existing site maps, variable frequency EM data, classical total magnetic field data and optimized GPR lead to success where a simpler less focused approach by other investigators using EM-31 and EM-61 electromagnetic methods and unfocused ground penetrating radar (GPR)did not produce results and defined no real anomalies. A variable frequency electromagnetic conductivity unit was used to collect the EM data at 3,030 Hz, 5,070 Hz, 8,430 Hz, and 14,010 Hz. Both in-phase and quadrature components were recorded at each station point. These results provided depth estimates for targets and some information on the subsurface conditions. A standard magnetometer was used to conduct the magnetic survey that showed the locations and extent of buried metal, the approximate volume of ferrous metal present within a particular area, and allowed estimation of approximate target depths. The GPR survey used a 200 megahertz (MHz) antenna to provide the maximum depth penetration and subsurface detail yielding usable signals to a depth of about 6 to 10 feet in this environment and allowed discrimination of objects that were deeper, particularly useful in the southern area of the site where shallow depth metallic debris (primarily roof flashing) complicated interpretation of the EM and magnetic data. Several geophysical anomalies were defined on the contour plots that indicated the presence of buried metal. During the first phase of the project, nine anomalies or anomalous areas were detected. The sizes, shapes, and magnitudes of the anomalies varied considerably, but given the anticipated size of the primary target of the investigation, only the most prominent anomalies were considered as potential caches of 30 to 60 buried drums. After completion of a second phase investigation, only two of the anomalies were of sufficient magnitude, not identifiable with existing known metallic objects such as monitoring wells, and in positions that corresponded to the location of alleged dumping activities and were recommended for further, intrusive investigation. Other important findings, based on the variable frequency EM method and its combination with total field magnetic and GPR data, included the confirmation of the position of the old NSDD, the ability to differentiate between ferrous and non-ferrous anomalies, and the detection of what may be plumes emanating from the landfill cell.

  8. GEOPHYSICAL APPLICATIONS OF SQUIDS

    E-Print Network [OSTI]

    Goubau, W.M.

    2013-01-01

    W. M. , and Clarke, J. : Geophysics Zimmerman, J. : Second1976). Sims, W. K. :, Geophysics E. , physics~. and Ketchen,Geo- and Clarke, J. : Geophysics Gamble, T. D. , Goubau, W.

  9. GEOPHYSICAL RESEARCH LETTERS, VOL. 24, NO. 23, PAGES 3097-3100, DECEMBER 1, 1997 Applicability of wavelet algorithm for geophysical

    E-Print Network [OSTI]

    Vasilyev, Oleg V.

    GEOPHYSICAL RESEARCH LETTERS, VOL. 24, NO. 23, PAGES 3097-3100, DECEMBER 1, 1997 Applicability of wavelet algorithm for geophysical viscoelastic flow Oleg V. Vasilyev,1 David A. Yuen,2 and Yuri Yu. Podladchikov3 Abstract. This paper introduces a newly developed wavelet technique for modeling of geophysical

  10. INTRODUCTION APPLIED GEOPHYSICS

    E-Print Network [OSTI]

    Merriam, James

    GEOL 384.3 INTRODUCTION TO APPLIED GEOPHYSICS OUTLINE INTRODUCTION TO APPLIED GEOPHYSICS GEOL 384 unknowns; the ones we don't know we don't know. And if one looks throughout the history of geophysics he didn't really say geophysics. He said, " ... our country and other free countries ...". But I am

  11. ERNEST LUTHER MAJER Ph.D., June 1978 Geophysics, University of California, Berkeley

    E-Print Network [OSTI]

    Ajo-Franklin, Jonathan

    , and for tracking fluid injection fronts. Staff Scientist, Group Leader Geophysics/Geomechanics Group Earth Sciences/Subsurface Geosciences, Geophysics/ Geomechanics Earth Sciences Division, 1994 - 2002 Lawrence Berkeley Laboratory Recent

  12. Non-Seismic Geophysical Approaches to Monitoring

    SciTech Connect (OSTI)

    Hoversten, G.M.; Gasperikova, Erika

    2004-09-01

    This chapter considers the application of a number of different geophysical techniques for monitoring geologic sequestration of CO2. The relative merits of the seismic, gravity, electromagnetic (EM) and streaming potential (SP) geophysical techniques as monitoring tools are examined. An example of tilt measurements illustrates another potential monitoring technique, although it has not been studied to the extent of other techniques in this chapter. This work does not represent an exhaustive study, but rather demonstrates the capabilities of a number of geophysical techniques on two synthetic modeling scenarios. The first scenario represents combined CO2 enhance oil recovery (EOR) and sequestration in a producing oil field, the Schrader Bluff field on the north slope of Alaska, USA. The second scenario is of a pilot DOE CO2 sequestration experiment scheduled for summer 2004 in the Frio Brine Formation in South Texas, USA. Numerical flow simulations of the CO2 injection process for each case were converted to geophysical models using petrophysical models developed from well log data. These coupled flow simulation geophysical models allow comparrison of the performance of monitoring techniques over time on realistic 3D models by generating simulated responses at different times during the CO2 injection process. These time-lapse measurements are used to produce time-lapse changes in geophysical measurements that can be related to the movement of CO2 within the injection interval.

  13. 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

  14. Test Plan for the Demonstration of Geophysical Techniques for Single-Shell Tank Leak Detection at the Hanford Mock Tank Site: Fiscal Year 2001

    SciTech Connect (OSTI)

    Barnett, D. Brent; Gee, Glendon W.; Sweeney, Mark D.

    2001-07-31

    As part of the Leak Detection, Monitoring and Mitigation (LDMM) program conducted by CH2M HILL 105-A during FY 2001. These tests are being conducted to assess the applicability of these methods (Electrical Resistance Tomography [ERT], High Resolution Resistivity [HRR], Cross-Borehole Seismography [XBS], Cross-Borehole Radar [XBR], and Cross-Borehole Electromagnetic Induction [CEMI]) to the detection and measurement of Single Shell Tank (SST) leaks into the vadose zone during planned sluicing operations. The testing in FY 2001 will result in the selection of up to two methods for further testing in FY 2002. In parallel with the geophysical tests, a Partitioning Interwell Tracer Test (PITT) study will be conducted simultaneously at the Mock Tank to assess the effectiveness of this technology in detecting and quantifying tank leaks in the vadose zone. Preparatory and background work using Cone Penetrometer methods (CPT) will be conducted at the Mock Tank site and an adjacent test area to derive soil properties for groundtruthing purposes for all methods.

  15. Fiber optic geophysical sensors

    DOE Patents [OSTI]

    Homuth, Emil F. (Los Alamos, NM)

    1991-01-01

    A fiber optic geophysical sensor in which laser light is passed through a sensor interferometer in contact with a geophysical event, and a reference interferometer not in contact with the geophysical event but in the same general environment as the sensor interferometer. In one embodiment, a single tunable laser provides the laser light. In another embodiment, separate tunable lasers are used for the sensor and reference interferometers. The invention can find such uses as monitoring for earthquakes, and the weighing of objects.

  16. Marine Geophysics: A Navy Symposium

    E-Print Network [OSTI]

    Shor, Elizabeth N; Ebrahimi, Carolyn L

    1987-01-01

    electrical polarization. Geophysics 22:660-687. Vacquier,Raitt, R. W. 1964. Geophysics of the South Pacific.Research in Geophysics 2:223-241. Francis, T. J. G. , and R.

  17. GEOLOGY & GEOPHYSICS 2014-2015

    E-Print Network [OSTI]

    Bermúdez, José Luis

    GEOLOGY & GEOPHYSICS 2014-2015 Graduate Student Handbook - 1 · Geology & Geophysics Core Values - 2 · A Message from the Graduate Advisor - 3 · Department Organizations - 60 · Departmental Executive Committee - 61 · Geology& Geophysics Development Advisory Council

  18. Numerical Simulation in Applied Geophysics. From the Mesoscale to the

    E-Print Network [OSTI]

    Santos, Juan

    Seismic wave propagation is a common technique used in hydrocarbon exploration geophysics, mining's crust and induce attenuation, dispersion and anisotropy of the seismic waves observed at the macroscale process. Numerical Simulation in Applied Geophysics. From the Mesoscale to the Macroscale ­ p. #12

  19. Expedited Site Characterization Geophysics: Geophysical Methods and Tools for Site Characterization

    E-Print Network [OSTI]

    Goldstein, N.E.

    2009-01-01

    Site Characterization Geophysics CONTENTS INTRODUCTIONSite Characterization Geophysics SELF-POTENTIAL Referencesand Environmental Geophysics, S. H. Ward, ed. (Soc. Expl.

  20. Dr. Benjamin R. Phillips Benjamin Phillips is a Program Director in Geophysics at the National Science

    E-Print Network [OSTI]

    Gilbes, Fernando

    Dr. Benjamin R. Phillips Benjamin Phillips is a Program Director in Geophysics at the National for Geophysics at the University of Texas at Austin developing earthquake location techniques in support. Associate Program Director, Geophysics National Science Foundation 4201 Wilson Boulevard Arlington, VA 22230

  1. DEVELOPING GIS VISUALIZATION WEB SERVICES FOR GEOPHYSICAL APPLICATIONS

    E-Print Network [OSTI]

    DEVELOPING GIS VISUALIZATION WEB SERVICES FOR GEOPHYSICAL APPLICATIONS A. Sayar a,b. *, M. Pierce Commission II, WG II/2 KEY WORDS: GIS, Geophysics, Visualization, Internet/Web, Interoperability, Networks Information System (GIS) community. In this paper we will describe our group's efforts to implement GIS

  2. Advanced signal processing in geophysical remote sensing

    SciTech Connect (OSTI)

    Witten, A.J.; King, W.C.

    1993-06-01

    This paper describes advanced signal processing methods which have improved the capabilities to detect and image the subsurface environment with geophysical remote sensing techniques. Field results are presented showing target detection, subsurface characterizations, and imaging of insitu waste treatment processes, all previously unachievable with such tools as ground penetrating radar, magnetometry and seismic.

  3. Advanced signal processing in geophysical remote sensing

    SciTech Connect (OSTI)

    Witten, A.J. ); King, W.C. . Dept. of Geography and Environmental Engineering)

    1993-01-01

    This paper describes advanced signal processing methods which have improved the capabilities to detect and image the subsurface environment with geophysical remote sensing techniques. Field results are presented showing target detection, subsurface characterizations, and imaging of insitu waste treatment processes, all previously unachievable with such tools as ground penetrating radar, magnetometry and seismic.

  4. Fiber optic geophysical sensors

    DOE Patents [OSTI]

    Homuth, E.F.

    1991-03-19

    A fiber optic geophysical sensor is described in which laser light is passed through a sensor interferometer in contact with a geophysical event, and a reference interferometer not in contact with the geophysical event but in the same general environment as the sensor interferometer. In one embodiment, a single tunable laser provides the laser light. In another embodiment, separate tunable lasers are used for the sensor and reference interferometers. The invention can find such uses as monitoring for earthquakes, and the weighing of objects. 2 figures.

  5. Department of Geophysics Colorado School of Mines

    E-Print Network [OSTI]

    Department of Geophysics Colorado School of Mines Golden, CO 80401 http://www.geophysics of Geophysics Colorado School of Mines Golden, CO 80401 http://www.geophysics.mines.edu/cgem Defended: May 11 (Geophysics) On Original Copies Dr. Terence K. Young Professor and Head Department of Geophysics Approved

  6. Physics and Astronomy Geophysics Concentration

    E-Print Network [OSTI]

    Thaxton, Christopher S.

    Physics and Astronomy Geophysics Concentration Strongly recommended courses Credits Term Dept. to Geophysics 3 PHY 3230 Thermal Physics 3 CHE 1101 Introductory Chemistry - I 3 CHE 1110 Introductory Chemistry

  7. SURFACE GEOPHYSICAL EXPLORATION - COMPENDIUM DOCUMENT

    SciTech Connect (OSTI)

    RUCKER DF; MYERS DA

    2011-10-04

    This report documents the evolution of the surface geophysical exploration (SGE) program and highlights some of the most recent successes in imaging conductive targets related to past leaks within and around Hanford's tank farms. While it is noted that the SGE program consists of multiple geophysical techniques designed to (1) locate near surface infrastructure that may interfere with (2) subsurface plume mapping, the report will focus primarily on electrical resistivity acquisition and processing for plume mapping. Due to the interferences from the near surface piping network, tanks, fences, wells, etc., the results of the three-dimensional (3D) reconstruction of electrical resistivity was more representative of metal than the high ionic strength plumes. Since the first deployment, the focus of the SGE program has been to acquire and model the best electrical resistivity data that minimizes the influence of buried metal objects. Toward that goal, two significant advances have occurred: (1) using the infrastructure directly in the acquisition campaign and (2) placement of electrodes beneath the infrastructure. The direct use of infrastructure was successfully demonstrated at T farm by using wells as long electrodes (Rucker et al., 2010, 'Electrical-Resistivity Characterization of an Industrial Site Using Long Electrodes'). While the method was capable of finding targets related to past releases, a loss of vertical resolution was the trade-off. The burying of electrodes below the infrastructure helped to increase the vertical resolution, as long as a sufficient number of electrodes are available for the acquisition campaign.

  8. 2, 637671, 2005 Geophysics and

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    BGD 2, 637­671, 2005 Geophysics and geochemistry of seafloor brines S. B. Joye et al. Title Page Discussions is the access reviewed discussion forum of Biogeosciences Geophysical and geochemical signatures under a Creative Commons License. 637 #12;BGD 2, 637­671, 2005 Geophysics and geochemistry of seafloor

  9. Joint Master Applied Geophysics

    E-Print Network [OSTI]

    Langendoen, Koen

    , engineering geophysics Year 2, October to February: RWTH Aachen Univer- sity Geothermics, petrophysics, borehole logging Year 2, March to August: Master thesis at one of the three universities or other approved is in geothermal exploration and basin modelling Aachen is situated on the rim of the wooded Eifel and Hautes

  10. Department of Geophysics Colorado School of Mines

    E-Print Network [OSTI]

    Department of Geophysics Colorado School of Mines Golden, CO 80401 http://www.geophysics of Geophysics Colorado School of Mines Golden, CO 80401 http://www.geophysics.mines.edu/cgem Defended: May 10 (Geophysics). Golden, Colorado Date May 15, 2006 Signed: on original copy Jeongmin Lee Signed: on original

  11. Department of Geophysics Colorado School of Mines

    E-Print Network [OSTI]

    Department of Geophysics Colorado School of Mines Golden, CO 80401 http://www.geophysics of Geophysics Colorado School of Mines Golden, CO 80401 http://www.geophysics.mines.edu/cgem Defended: September fulfillment of the requirements for the degree of Master of Science (Geophysics). Golden, Colorado Date

  12. Department of Geophysics Colorado School of Mines

    E-Print Network [OSTI]

    Department of Geophysics Colorado School of Mines Golden, CO 80401 http://www.geophysics;#12;Department of Geophysics Colorado School of Mines Golden, CO 80401 http://www.geophysics of the requirements for the degree of Master of Science (Geophysics). Golden, Colorado Date: April 14, 2005 Signed

  13. Highlights of the 2009 SEG summer research workshop on ""CO2 sequestration geophysics

    SciTech Connect (OSTI)

    Huang, Lianjie; Lumley, David; Sherlock, Don; Daley, Tom; Lawton, Don; Masters, Ron; Verliac, Michel; White, Don

    2009-01-01

    The 2009 SEG Summer Research Workshop on 'CO{sub 2} Sequestration Geophysics' was held August 23-27, 2009 in Banff, Canada. The event was attended by over 100 scientists from around the world, which proved to be a remarkably successful turnout in the midst of the current global financial crisis and severe corporate travel restrictions. Attendees included SEG President Larry Lines (U. Calgary), and CSEG President John Downton (CGG Veritas), who joined SRW Chairman David Lumley (UWA) in giving the opening welcome remarks at the Sunday Icebreaker. The workshop was organized by an expert technical committee representing a good mix of industry, academic, and government research organizations. The format consisted of four days of technical sessions with over 60 talks and posters, plus an optional pre-workshop field trip to the Columbia Ice Fields to view firsthand the effects of global warming on the Athabasca glacier. Group technical discussion was encouraged by requiring each presenter to limit themselves to 15 minutes of presentation followed by a 15 minute open discussion period. Technical contributions focused on the current and future role of geophysics in CO{sub 2} sequestration, highlighting new research and field-test results with regard to site selection and characterization, monitoring and surveillance, using a wide array of geophysical techniques. While there are too many excellent contributions to mention all individually here, in this paper we summarize some of the key workshop highlights in order to propagate new developments to the SEG community at large.

  14. Highlights of the 2009 SEG summer research workshop on"CO2 Sequestration Geophysics"

    SciTech Connect (OSTI)

    Lumley, D.; Sherlock, D.; Daley, T.; Huang, L.; Lawton, D.; Masters, R.; Verliac, M.; White, D.

    2010-01-15

    The 2009 SEG Summer Research Workshop on CO2 Sequestration Geophysics was held August 23-27, 2009 in Banff, Canada. The event was attended by over 100 scientists from around the world, which proved to be a remarkably successful turnout in the midst of the current global financial crisis and severe corporate travel restrictions. Attendees included SEG President Larry Lines (U. Calgary), and CSEG President John Downton (CGG Veritas), who joined SRW Chairman David Lumley (UWA) in giving the opening welcome remarks at the Sunday Icebreaker. The workshop was organized by an expert technical committee (see side bar) representing a good mix of industry, academic, and government research organizations. The format consisted of four days of technical sessions with over 60 talks and posters, plus an optional pre-workshop field trip to the Columbia Ice Fields to view firsthand the effects of global warming on the Athabasca glacier (Figures 1-2). Group technical discussion was encouraged by requiring each presenter to limit themselves to 15 minutes of presentation followed by a 15 minute open discussion period. Technical contributions focused on the current and future role of geophysics in CO2 sequestration, highlighting new research and field-test results with regard to site selection and characterization, monitoring and surveillance, using a wide array of geophysical techniques. While there are too many excellent contributions to mention all individually here, in this paper we summarize some of the key workshop highlights in order to propagate new developments to the SEG community at large.

  15. Understanding biogeobatteries: Where geophysics meets microbiology

    E-Print Network [OSTI]

    Revil, A.

    2010-01-01

    duckling of environmental geophysics, Leading Edge, 21(5),Pure and Applied Geophysics, 157, 357-382. Pinder, G.F. ,sulfide self-potentials, Geophysics, 25, 226–249. Sauck, W.

  16. Geophysical Monitoring of Hydrological and Biogeochemical

    E-Print Network [OSTI]

    Hubbard, Susan

    Geophysical Monitoring of Hydrological and Biogeochemical Transformations Associated with Cr explored the use of geophysical approaches for monitoring the spatiotemporal distribution of hydrological first integrated hydrological wellbore and geophysical tomographic data sets to estimate hydrological

  17. DEPARTMENT OF GEOLOGY & GEOPHYSICS UNDERGRADUATE

    E-Print Network [OSTI]

    DEPARTMENT OF GEOLOGY & GEOPHYSICS UNDERGRADUATE SURVIVAL MANUAL 2014-2015 SCHOOL OF OCEAN & EARTH SCIENCE & TECHNOLOGY UNIVERSITY OF HAWAI`I AT MNOA Updated January 2015 #12;INTRODUCTION 1 Geology OF GEOLOGY & GEOPHYSICS _ 2 Who We Are _ 2 Where To Get Help _ 2 POLICIES, PROCEDURES & REQUIREMENTS 3

  18. Department of Geophysics Colorado School of Mines

    E-Print Network [OSTI]

    Department of Geophysics Colorado School of Mines Golden, CO 80401 http://www.geophysics Colorado School of Mines CGEM Alisa Marie Green #12;Department of Geophysics Colorado School of Mines Golden, CO 80401 http://www.geophysics.mines.edu/cgem Defended: November 06, 2003 Advisor: Dr. Yaoguo Li

  19. Department of Geophysics Colorado School of Mines

    E-Print Network [OSTI]

    Department of Geophysics Colorado School of Mines Golden, CO 80401 http://www.geophysics Colorado School of Mines CGEM Dongjie Cheng #12;#12;Department of Geophysics Colorado School of Mines Golden, CO 80401 http://www.geophysics.mines.edu/cgem Defended: December 2003 Advisor: Dr. Yaoguo Li (GP

  20. Geophysical imaging methods for analysis of the Krafla Geothermal Field, NE Iceland

    E-Print Network [OSTI]

    Parker, Beatrice Smith

    2012-01-01

    Joint geophysical imaging techniques have the potential to be reliable methods for characterizing geothermal sites and reservoirs while reducing drilling and production risks. In this study, we applied a finite difference ...

  1. wavelet domain inversion and joint deconvolution/interpolation of geophysical data

    E-Print Network [OSTI]

    Kane, Jonathan A. (Jonathan Andrew), 1973-

    2003-01-01

    This thesis presents two innovations to geophysical inversion. The first provides a framework and an algorithm for combining linear deconvolution methods with geostatistical interpolation techniques. This allows for sparsely ...

  2. Geophysical Research Abstracts Vol. 12, EGU2010-PREVIEW, 2010

    E-Print Network [OSTI]

    Boyer, Edmond

    (s) 2010 Overview of seismic imagery techniques applied to landslides characterization. Gilles Grandjean, geophysical methods based on seismic surveying appear to be well-adapted to investigate the morpho and non-intrusive measurements of acoustic (Vp) or shear (Vs) wave velocity, two important physical

  3. APPLICATION OF BOREHOLE GEOPHYSICS AT AN EXPERIMENTAL WASTE STORAGE SITE

    E-Print Network [OSTI]

    Nelson, P.H.

    2014-01-01

    letal Ore Deposits, 11 in Geophysics and Geochemistry in the11 Applications of Borehole Geophysics to Water-ResourcesAPPLICATION OF BOREHOLE GEOPHYSICS AT AN EXPERIMENTAL WASTE

  4. Lunar geophysics: The Moon's fundamental shape and paleomagnetism studies

    E-Print Network [OSTI]

    Perera, Viranga

    2014-01-01

    Tectonics.   Reviews  of  Geophysics  and  Space   Physics  SANTA CRUZ Lunar geophysics: The Moon’s fundamental shapeViranga Perera Lunar geophysics: The Moon’s fundamental

  5. Geophysical data fusion for subsurface imaging. Phase 1

    SciTech Connect (OSTI)

    Hoekstra, P.; Vandergraft, J.; Blohm, M.; Porter, D.

    1993-08-01

    A geophysical data fusion methodology is under development to combine data from complementary geophysical sensors and incorporate geophysical understanding to obtain three dimensional images of the subsurface. The research reported here is the first phase of a three phase project. The project focuses on the characterization of thin clay lenses (aquitards) in a highly stratified sand and clay coastal geology to depths of up to 300 feet. The sensor suite used in this work includes time-domain electromagnetic induction (TDEM) and near surface seismic techniques. During this first phase of the project, enhancements to the acquisition and processing of TDEM data were studied, by use of simulated data, to assess improvements for the detection of thin clay layers. Secondly, studies were made of the use of compressional wave and shear wave seismic reflection data by using state-of-the-art high frequency vibrator technology. Finally, a newly developed processing technique, called ``data fusion,`` was implemented to process the geophysical data, and to incorporate a mathematical model of the subsurface strata. Examples are given of the results when applied to real seismic data collected at Hanford, WA, and for simulated data based on the geology of the Savannah River Site.

  6. INSTITUTE OF GEOPHYSICS AND PLANETARY PHYSICS (IGPP)

    E-Print Network [OSTI]

    INSTITUTE OF GEOPHYSICS AND PLANETARY PHYSICS (IGPP) LOS ALAMOS NATIONAL LABORATORY (LANL) FY11, 2010 1. INTRODUCTION The Institute of Geophysics and Planetary Physics (IGPP) at Los Alamos National of California's Systemwide Institute of Geophysics and Planetary Physics. Its science mission is to promote

  7. 2010 Western Pacific Geophysics Search Results

    E-Print Network [OSTI]

    Ng, Chung-Sang

    2010 Western Pacific Geophysics Meeting Search Results Cite abstracts as Author(s) (2010), Title: Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States AU: Ragunathan, S EM: srivatta@gi.alaska.edu AF: Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United

  8. Geophysical Institute. Biennial report, 1993-1994

    SciTech Connect (OSTI)

    1996-01-01

    The 1993-1994 Geophysical Institute Biennial Report was published in November 1995 by the Geophysical Institute of the University of Alaska Fairbanks. It contains an overview of the Geophysical Institute, the Director`s Note, and research presentations concerning the following subjects: Scientific Predictions, Space Physics, Atmospheric Sciences, Snow, Ice and Permafrost, Tectonics and Sedimentation, Seismology, Volcanology, Remote Sensing, and other projects.

  9. Geophysical modeling of two willemite deposits, Vazante (Brazil) and Beltana (Australia) Richard A. Krahenbuhl* and Murray Hitzman

    E-Print Network [OSTI]

    by conventional processing techniques and geophysical inversion. Vazante deposit in Brazil The Vazante willemite. The mineralized portion of the fault zone extends more than 5 kilometers along strike and is known from drilling

  10. Hydrogeological-Geophysical Methods for Subsurface Site Characterization - Final Report

    SciTech Connect (OSTI)

    Rubin, Yoram

    2001-01-01

    The goal of this research project is to increase water savings and show better ecological control of natural vegetation by developing hydrogeological-geophysical methods for characterizing the permeability and content of water in soil. The ground penetrating radar (GPR) tool was developed and used as the surface geophysical method for monitoring water content. Initial results using the tool suggest that surface GPR is a viable technique for obtaining precision volumetric water content profile estimates, and that laboratory-derived petrophysical relationships could be applied to field-scale GPR data. A field-scale bacterial transport study was conducted within an uncontaminated sandy Pleistocene aquifer to evaluate the importance of heterogeneity in controlling the transport of bacteria. Geochemical, hydrological, geological, and geophysical data were collected to characterize the site prior to and after chemical and bacterial injection experiments. Study results shows that, even within the fairly uniform shallow marine deposits of the narrow channel focus area, heterogeneity existed that influenced the chemical tracer transport over lateral distances of a few meters and vertical distances of less than a half meter. The interpretation of data suggest that the incorporation of geophysical data with limited hydrological data may provide valuable information about the stratigraphy, log conductivity values, and the spatial correlation structure of log conductivity, which have traditionally been obtainable only by performing extensive and intrusive hydrological sampling.

  11. 2012 Fellow American Geophysical Union

    E-Print Network [OSTI]

    Kurapov, Alexander

    ) are critical to the intensity of ocean currents, to long- and short-term climate variations, and the health2012 Fellow American Geophysical Union James Moum, professor in the College of Earth, Ocean contributions to our understanding of ocean mixing in coastal, abyssal and Equatorial regimes using innovative

  12. Expedited Site Characterization Geophysics: Geophysical Methods and Tools for Site Characterization

    E-Print Network [OSTI]

    Goldstein, N.E.

    2009-01-01

    EXPEDITED ITE S CHARACTERIZATION EOPHYSICS G GEOPHYSICALM AND TOOLSFORSITE CHARACTERIZATION NORMAN E. GOLDSTEINExpedited Site Characterization Geophysics CONTENTS

  13. Geophysical data fusion for subsurface imaging. Final report

    SciTech Connect (OSTI)

    NONE

    1995-10-01

    This report contains the results of a three year, three-phase project whose long-range goal has been to create a means for the more detailed and accurate definition of the near-surface (0--300 ft) geology beneath a site that had been subjected to environmental pollution. The two major areas of research and development have been: improved geophysical field data acquisition techniques; and analytical tools for providing the total integration (fusion) of all site data. The long-range goal of this project has been to mathematically, integrate the geophysical data that could be derived from multiple sensors with site geologic information and any other type of available site data, to provide a detailed characterization of thin clay layers and geological discontinuities at hazardous waste sites.

  14. DEPARTMENT OF GEOLOGY AND GEOPHYSICS UNDERGRADUATE SCHOLARSHIP APPLICATION

    E-Print Network [OSTI]

    Johnson, Cari

    DEPARTMENT OF GEOLOGY AND GEOPHYSICS UNDERGRADUATE SCHOLARSHIP APPLICATION Environment Geophysics Other: GeoEng Earth Science Teaching Anticipated & Geophysics 115 S. 1460 E. Room 383, Salt Lake City, UT 84112-0102 Phone 801

  15. Howard A. Zebker Professor of Geophysics and Electrical Engineering

    E-Print Network [OSTI]

    Zebker, Howard

    Howard A. Zebker Professor of Geophysics and Electrical Engineering Stanford University, Stanford, Departments of Geophysics and Electrical Engineering (joint appt.), Stanford University, Stanford, CA. 1995-2006 Associate Professor, Departments of Geophysics and Electrical Engineering (joint appt.), Stanford University

  16. Towards Real Earth Models --Computational Geophysics on Unstructured Tetrahedral Meshes?

    E-Print Network [OSTI]

    Farquharson, Colin G.

    Towards Real Earth Models -- Computational Geophysics on Unstructured Tetrahedral Meshes? Colin tetrahedral meshes. EM geophysics on unstructured tetrahedral meshes. Disadvantages, difficulties, challenges. Conclusions. #12;Outline: Geological models! Advantages of unstructured tetrahedral meshes. EM geophysics

  17. SAGE, Summer of Applied Geophysical Experience

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

    enhance a student's knowledge by going beyond a standard classroom-based geophysics curriculum, and to encourage qualified students in related fields to consider careers in...

  18. Institute of Geophysics, Planetary Physics and Signatures

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

    IGPPS Institute of Geophysics, Planetary Physics and Signatures High quality, cutting-edge science in the areas of astrophysics, space physics, solid planetary geoscience and...

  19. On the Quantum Aspects of Geophysics

    E-Print Network [OSTI]

    F. Darabi

    2004-10-10

    We introduce a simple quantum mechanical justification for the formation of folded mountains. It is very appealing to develop this idea to a theory of {\\it Quantum Geophysics}

  20. Regional geophysics, Cenozoic tectonics and geologic resources...

    Open Energy Info (EERE)

    adjoining regions Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Regional geophysics, Cenozoic tectonics and geologic resources of the...

  1. High Precision Geophysics & Detailed Structural Exploration ...

    Open Energy Info (EERE)

    reservoir and identification of deep up flow targets. These surveys and the drilling process have been designed to severely limit the impact of the exploration. The geophysics...

  2. Advanced 3D Geophysical Imaging Technologies for Geothermal Resource...

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

    3D Geophysical Imaging Technologies for Geothermal Resource Characterization Advanced 3D Geophysical Imaging Technologies for Geothermal Resource Characterization Advanced 3D...

  3. Borehole geophysics evaluation of the Raft River geothermal reservoir...

    Open Energy Info (EERE)

    Borehole geophysics evaluation of the Raft River geothermal reservoir, Idaho Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Borehole geophysics...

  4. UNIVERSITY OF HAWAII AT MANOA DEPARTMENT OF GEOLOGY AND GEOPHYSICS

    E-Print Network [OSTI]

    UNIVERSITY OF HAWAII AT MANOA DEPARTMENT OF GEOLOGY AND GEOPHYSICS Graduate Admissions 1680 East * Geophysics & Tectonics; Marine & Environmental Geology; Planetary Geosciences; Volcanology, Geochemistry

  5. A resolution analysis of two geophysical imaging methods for characterizing and monitoring hydrologic conditions in the Vadose zone.

    SciTech Connect (OSTI)

    Brainard, James Robert; Hammond, Gary.; Alumbaugh, David L.; La Brecque, D.J.

    2007-06-01

    This research project analyzed the resolution of two geophysical imaging techniques, electrical resistivity tomography (ERT) and cross-borehole ground penetrating radar (XBGPR), for monitoring subsurface flow and transport processes within the vadose zone. The study was based on petrophysical conversion of moisture contents and solute distributions obtained from unsaturated flow forward modeling. This modeling incorporated boundary conditions from a potable water and a salt tracer infiltration experiment performed at the Sandia-Tech Vadose Zone (STVZ) facility, and high-resolution spatial grids (6.25-cm spacing over a 1700-m domain) and incorporated hydraulic properties measured on samples collected from the STVZ. The analysis process involved petrophysical conversion of moisture content and solute concentration fields to geophysical property fields, forward geophysical modeling using the geophysical property fields to obtain synthetic geophysical data, and finally, inversion of this synthetic data. These geophysical property models were then compared to those derived from the conversion of the hydrologic forward modeling to provide an understanding of the resolution and limitations of the geophysical techniques.

  6. Electrical Impedance Tomography in geophysics, application of EIDORS

    E-Print Network [OSTI]

    Adler, Andy

    Electrical Impedance Tomography in geophysics, application of EIDORS Lesparre N., Adler A., Gibert to adapt EIDORS for applications in geophysics. In geophysics, we apply EIT in order to image inner. The spatial resolution of the method in geophysics is of the order of meters and the penetration depth can

  7. Bachelor of Science, Geophysics, 2013-2014 Name ID# Date

    E-Print Network [OSTI]

    Barrash, Warren

    Bachelor of Science, Geophysics, 2013-2014 Name ID# Date General Degree Requirements Residency with Lab 4 COMPSCI 115 Introduction to C 2 GEOPH 201 Seeing the Unseen: an Introduction to Geophysics 4 GEOPH 300 Physics of the Earth 3 GEOPH 305 Applied Geophysics 3 GEOPH 420 Geophysical Applications

  8. Archaeological investigation of the Court Kiva in Chaco Canyon using geophysical methods Cericia Martinez*

    E-Print Network [OSTI]

    -invasive, geophysical techniques. Due to the non-invasive nature of magnetic, electrical and electromagnetic data as park approval is granted. The data and interpretation from a component of this project is the focus and subsequently backfilled for preservation purposes. There is very little record of the Court Kiva's excavation

  9. Geology and Geophysics at the University of Utah Advisors for Undergraduate Geology & Geophysics Students (2014-15 academic year)

    E-Print Network [OSTI]

    Johnson, Cari

    Geology and Geophysics at the University of Utah Advisors for Undergraduate Geology & Geophysics Students (2014-15 academic year): General Academic Advising for Geology & Geophysics Majors ­ Ms. Judy.dinter@utah.edu, office: 321 FASB, phone 801-581-7937) Faculty Advisor for Geophysics Emphasis, Geoscience Major ­ Prof

  10. GEOPHYSICS

    E-Print Network [OSTI]

    19 800 sismi ues dans les milieux strati?és a deux et trois dimensions: contri ution a la construction et a lime relation des sismo- grammes synthetiques: These

  11. Geophysics

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journalvivo Low-Dose Low LET Ionizing RadiationSNACGeographyGeometry

  12. Advances in borehole geophysics for hydrology

    SciTech Connect (OSTI)

    Nelson, P.H.

    1982-01-01

    Borehole geophysical methods provide vital subsurface information on rock properties, fluid movement, and the condition of engineered borehole structures. Within the first category, salient advances include the continuing improvement of the borehole televiewer, refinement of the electrical conductivity dipmeter for fracture characterization, and the development of a gigahertz-frequency electromagnetic propagation tool for water saturation measurements. The exploration of the rock mass between boreholes remains a challenging problem with high potential; promising methods are now incorporating high-density spatial sampling and sophisticated data processing. Flow-rate measurement methods appear adequate for all but low-flow situations. At low rates the tagging method seems the most attractive. The current exploitation of neutron-activation techniques for tagging means that the wellbore fluid itself is tagged, thereby eliminating the mixing of an alien fluid into the wellbore. Another method uses the acoustic noise generated by flow through constrictions and in and behind casing to detect and locate flaws in the production system. With the advent of field-recorded digital data, the interpretation of logs from sedimentary sequences is now reaching a sophisticated level with the aid of computer processing and the application of statistical methods. Lagging behind are interpretive schemes for the low-porosity, fracture-controlled igneous and metamorphic rocks encountered in the geothermal reservoirs and in potential waste-storage sites. Progress is being made on the general problem of fracture detection by use of electrical and acoustical techniques, but the reliable definition of permeability continues to be an elusive goal.

  13. Interim progress report addendun - environmental geophysics: Building E5032 decommissioning, Aberdeen Proving Ground, January 1994 resurvey

    SciTech Connect (OSTI)

    Thompson, M.D.; McGinnis, L.D.; Benson, M.A.; Borden, H.M.; Padar, C.A.

    1994-12-01

    Geophysical surveying around Building E5032 using three new continuously recording geophysical instruments - two types of electromagnetic induction instruments and a cesium vapor magnetometer that were unavailable at the time of the original survey - has provided additional information for defining the location of buried debris, vaults, tanks, and the drainage/sump system near the building. The dominant geophysical signature around Building E5032 consists of a complex pattern of linear magnetic, electrical-conductivity, and electromagnetic field anomalies that appear to be associated with drainage/sewer systems, ditches, past railway activity, the location for Building T5033 (old number 99A), and the probable location of Building 91. Integrated analysis of data acquired using the three techniques, plus a review of the existing ground-penetrating-radar data, allow a more thorough definition of the sources for the observed anomalies.

  14. Department of Geology & Geophysics University of Hawaii

    E-Print Network [OSTI]

    Department of Geology & Geophysics University of Hawaii THE APPLICATION CHECKLIST SEND THESE ITEMS TO : University of Hawaii Graduate Division Admissions Office 2540 Maile Way, Spalding Hall 354 Honolulu, HI 96822 Original application and fees. http://www.hawaii

  15. Assessing Soil Strength From Geophysical Surveys 

    E-Print Network [OSTI]

    Khan, Rehan

    2014-04-24

    A study is presented to develop framework for correlating sand strength (friction angle) to geophysical measurements, primarily shear wave and body wave velocities. Triaxial tests accompanied by wave velocity measurements was performed to generate a...

  16. Wave radiation in simple geophysical models 

    E-Print Network [OSTI]

    Murray, Stuart William

    2013-07-01

    Wave radiation is an important process in many geophysical flows. In particular, it is by wave radiation that flows may adjust to a state for which the dynamics is slow. Such a state is described as “balanced”, meaning ...

  17. Engineering and environmental geophysics at the millennium

    E-Print Network [OSTI]

    Steeples, Don W.

    2001-01-01

    Near?surface geophysics is being applied to a broader spectrum of problems than ever before, and new application areas are arising continually. Currently, the tools used to examine the near?surface environment include a variety of noninvasive...

  18. GEOPHYSICAL METHODS In 2003, a group of scientists in Swit-

    E-Print Network [OSTI]

    Podladchikov, Yuri

    Hz in surface velocity data measured above hydrocarbon reservoirs.1 The possibility of a universal behind these "hydrocarbon micro-tremors" that Dangel1 and others2,3,4,5 have found. A strong scientific of the industry will embrace them. HYDROCARBON MICROTREMORS The starting point for our work has been the empirical

  19. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 52, NO. 5, MAY 2004 1449 Time-Domain Measurement of Negative Group

    E-Print Network [OSTI]

    Mojahedi, Mohammad

    ), metamaterials, negative group delay (NGD), negative group velocity (NGV), negative refractive index (NRI). I. It was initially stated that left handedness was equivalent to having a negative group velocity (NGV) [1], and that an NGV is a necessary characteristic of left-handed metamaterials [2]. Additional conflicting assertions

  20. UNIVERSITY OF HAWAII AT MANOA DEPARTMENT OF GEOLOGY AND GEOPHYSICS

    E-Print Network [OSTI]

    UNIVERSITY OF HAWAII AT MANOA DEPARTMENT OF GEOLOGY AND GEOPHYSICS Graduate Admissions 1680 East's admissibility into the Graduate Program in Geology and Geophysics at the University of Hawaii at Manoa. Strongly

  1. Numerical Simulation in Applied Geophysics. From the Mesoscale to ...

    E-Print Network [OSTI]

    2013-07-05

    hydrocarbon exploration geophysics, mining and reservoir characterization and production. Local variations in the fluid and solid matrix properties, fine layering,.

  2. Teaching Techniques 

    E-Print Network [OSTI]

    Howard, Jeff W.

    2005-05-10

    with others such as a small group discussion or the question-answer technique to al- low the 4-H?ers to express their opinion. 2. Illustrated talk This method is an offshoot of the lecture technique, in which the teacher supports the talk with such things... as drawings, posters, copies of articles and other materials. The drawings or posters need not be professional art pieces, they need only be interesting and clear. For ex- ample, in entomology, rather than just talking about the various shapes...

  3. MULTIFRACTALS, GENERALIZED SCALE INVARIANCE AND COMPLEXITY IN GEOPHYSICS

    E-Print Network [OSTI]

    Lovejoy, Shaun

    MULTIFRACTALS, GENERALIZED SCALE INVARIANCE AND COMPLEXITY IN GEOPHYSICS DANIEL SCHERTZER LEESU, Que. H3A 2T8, Canada lovejoy@physics.mcgill.ca Received The complexity of geophysics has been with anisotropy, which is rather ubiquitous in geophysics. Keywrods: multifractals, generalized scale invariance

  4. Uncertainty and Predictability in Geophysics: Chaos and Multifractal Insights

    E-Print Network [OSTI]

    Lovejoy, Shaun

    Uncertainty and Predictability in Geophysics: Chaos and Multifractal Insights Daniel Schertzer Department, McGill University, Montreal, Canada Uncertainty and error growth are crosscutting geophysical extremes. The focus is now on time-space geophysical scaling behavior: their multifractality. It is found

  5. Scale, scaling and multifractals in geophysics: twenty Shaun Lovejoy1

    E-Print Network [OSTI]

    Lovejoy, Shaun

    Scale, scaling and multifractals in geophysics: twenty years on Shaun Lovejoy1 and Daniel Schertzer number of degrees of freedom approaches to nonlin- ear geophysics: a) the transition from fractal are generally necessary for geophysical applications. We illustrate these ideas with data analyses from both

  6. Geophysical Research Abstracts Vol. 12, EGU2010-4885, 2010

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Geophysical Research Abstracts Vol. 12, EGU2010-4885, 2010 EGU General Assembly 2010 © Author(s) 2010 The DIGISOIL multi-sensor system: from geophysical measurements to soil properties. Gilles geophysical technologies for answering this societal demand. To this aim, DIGISOIL addresses four issues

  7. Nathan L. B. Bangs ADDRESS Institute for Geophysics

    E-Print Network [OSTI]

    Yang, Zong-Liang

    Nathan L. B. Bangs ADDRESS Institute for Geophysics The University of Texas Pickle Research Campus@utig.ig.utexas.edu EDUCATION B.A. Williams College, 1983, Geology and Physics M.A. Columbia University, 1986, Marine Geophysics M. Phil. Columbia University, 1987, Marine Geophysics Ph.D. Columbia University, 1991, Marine

  8. Syllabus: Applied Environmental Geophysics MGG 525 Fall 2011, 3 credits

    E-Print Network [OSTI]

    Miami, University of

    1 Syllabus: Applied Environmental Geophysics MGG 525 Fall 2011, 3 credits (Version 110824e) Instructor: Mark Grasmueck, Associate Professor Marine Geology and Geophysics RSMAS University of Miami Tel: The purpose of this course is to familiarize you with the fundamentals of near-surface geophysical site

  9. Geophysical detection and structural characterization of discontinuities in rock

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Geophysical detection and structural characterization of discontinuities in rock slopes (J. Deparis geophysical methods (seismic, electric and electromagnetic) are available to address this problem, differing and geophysical methods for characterizing the rock mass. Section 2 is dedicated to a review of the main

  10. Geophysical Research Abstracts Vol. 12, EGU2010-8384, 2010

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Geophysical Research Abstracts Vol. 12, EGU2010-8384, 2010 EGU General Assembly 2010 © Author are known to be highly dependent on local site characteristics. Therefore combining geophysical meth- ods. In order to calibrate geophysical measurements, obser- vations of 130 boreholes (4 meters deep) were made

  11. Geophysical Research Abstracts Vol. 12, EGU2010-11992, 2010

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Geophysical Research Abstracts Vol. 12, EGU2010-11992, 2010 EGU General Assembly 2010 © Author(s) 2010 Contribution of the airborne geophysical survey to the study of the regolith : A case study of regolith properties: superficial studies combining geology, geochemistry and geophysics become essential

  12. Geophysical Research Abstracts Vol. 12, EGU2010-4993, 2010

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Geophysical Research Abstracts Vol. 12, EGU2010-4993, 2010 EGU General Assembly 2010 © Author(s) 2010 Geophysical observations at cavity collapse Philippe Jousset, Behrooz Bazargan-Sabet, François relate the variations of the brine pumping rate with the evolutions of the induced geophysical signals

  13. NATIONAL GEOPHYSICAL DATA CENTER NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

    E-Print Network [OSTI]

    NATIONAL GEOPHYSICAL DATA CENTER NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION U.S. DEPARTMENT Graig McHendrie Stuart M. Smith National Geophysical Data Center Boulder, Colorado September 1977 countries participated in a workshop at the National Geophysical Data Center (NGDC) in Boulder, Colorado

  14. DEPARTMENT OF GEOLOGY & GEOPHYSICS School of Ocean & Earth Science & Technology

    E-Print Network [OSTI]

    DEPARTMENT OF GEOLOGY & GEOPHYSICS School of Ocean & Earth Science & Technology University of Hawaii at Manoa REQUIREMENTS FOR A MINOR IN GEOLOGY & GEOPHYSICS The minor requires GG 101 (or 103) & 101L or GG 170, 200, and 11 credits hours of non-introductory Geology and Geophysics courses at the 300

  15. GEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 22, PAGES 2615-3618, NOVEMBER 15, 2000 Geodetic network optimization for geophysical parameters

    E-Print Network [OSTI]

    Tingley, Joseph V.

    GEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 22, PAGES 2615-3618, NOVEMBER 15, 2000 3615 Geodetic network optimization for geophysical parameters Geoffrey Blewitt Nevada Bureau of Mines and Geology is gener- alized here, to seek the network configuration that optimizes the precision of geophysical

  16. Geology and Geophysics at the University of Utah Advisors for Undergraduate Geology & Geophysics Students (2014-15 academic year)

    E-Print Network [OSTI]

    Johnson, Cari

    Geology and Geophysics at the University of Utah Advisors for Undergraduate Geology & Geophysics Students (2014-15 academic year): General Academic Advising for Geology & Geophysics Majors ­ Ms. Judy for Geology Emphasis, Geoscience Major ­ Prof. Brenda Bowen (email: brenda.bowen@ utah.edu, office: 341 FASB

  17. Invariance, groups, and non-uniqueness: The discrete case

    SciTech Connect (OSTI)

    Vasco, D.W.

    2005-03-24

    Lie group methods provide a valuable tool for examininginvariance and non-uniqueness associated with geophysical inverseproblems. The techniques are particularly well suited for the study ofnon-linear inverse problems. Using the infinitesimal generators of thegroup it is possible to move within the null space in an iterativefashion. The key computational step in determining the symmetry groupsassociated with an inverse problem is the singular value decomposition(SVD) of a sparse matrix. I apply the methodology to the eikonal equationand examine the possible solutions associated with a crosswelltomographic experiment. Results from a synthetic test indicate that it ispossible to vary the velocity model significantly and still fit thereference arrival times. the approach is also applied to data fromcorosswell surveys conducted before and after a CO2 injection at the LostHills field in California. The results highlight the fact that a faultcross-cutting the region between the wells may act as a conduit for theflow of water and CO2.

  18. GEOPHYSICS FOR SLOPE STABILITY ROBERT HACK

    E-Print Network [OSTI]

    Hack, Robert

    GEOPHYSICS FOR SLOPE STABILITY ROBERT HACK Section Engineering Geology, Centre for Technical-mail: hack@itc.nl (Received 2 June, 2000; Accepted 4 September, 2000) Abstract. A pre-requisite in slope Publishers. Printed in the Netherlands. #12;424 ROBERT HACK the slope material with, for example, manganese

  19. Leasing and Exploration * Seismic geophysical surveys

    E-Print Network [OSTI]

    #12;Leasing and Exploration * Seismic geophysical surveys * Exploratory drilling using various of these incremental steps; leasing and exploration. Subsequent phases of OCS development (production, transportation) prepared by MMS, as well as pertinent research on the bowhead whale and matters related to oil exploration

  20. INVERSION FOR APPLIED GEOPHYSICS: A TUTORIAL

    E-Print Network [OSTI]

    Oldenburg, Douglas W.

    velocity, electrical conductivity, or magnetic susceptibility. The appropriate geophysical survey. To obtain that information the data need to be inverted to generate a 3D subsurface distribution principles. Our goal is to present those principles, discuss in detail the essential elements of the inverse

  1. Geophysics of Chemical Heterogeneity in the Mantle

    E-Print Network [OSTI]

    Stixrude, Lars

    , transition zone Abstract Chemical heterogeneity, produced by the near-surface rock cycle and dom- inatedGeophysics of Chemical Heterogeneity in the Mantle Lars Stixrude and Carolina Lithgow. This lithologic-scale chemical het- erogeneity may survive in the mantle for as long as the age of Earth because

  2. Transdimensional Approaches to Geophysical Inverse Problems

    E-Print Network [OSTI]

    Bodin, Thomas

    complicated and quantitative mechanisms with simple qualitative concepts. This research was supported underTransdimensional Approaches to Geophysical Inverse Problems Thomas Bodin October 2010 A thesis Except where otherwise indicated in the text, the research described in this thesis is my own original

  3. GeophysicalResearchLetters RESEARCH LETTER

    E-Print Network [OSTI]

    Gordon, Arnold L.

    GeophysicalResearchLetters RESEARCH LETTER 10.1002/2014GL061661 Key Points: · The 1934 drought), The worst North American drought year of the last millennium: 1934, Geophys. Res. Lett., 41, doi:10 North American drought year of the last millennium: 1934 Benjamin I. Cook1,2 , Richard Seager2

  4. GeophysicalResearchLetters RESEARCH LETTER

    E-Print Network [OSTI]

    GeophysicalResearchLetters RESEARCH LETTER 10.1002/2014GL061661 Key Points: · The 1934 drought), The worst North American drought year of the last millennium: 1934, Geophys. Res. Lett., 41, 7298­7305, doi Published online 18 OCT 2014 The worst North American drought year of the last millennium: 1934 Benjamin I

  5. Wavelet correlations to reveal multiscale coupling in geophysical systems

    E-Print Network [OSTI]

    Casagrande, Erik; Miralles, Diego; Entekhabi, Dara; Molini, Annalisa

    2015-01-01

    The interactions between climate and the environment are highly complex. Due to this complexity, process-based models are often preferred to estimate the net magnitude and directionality of interactions in the Earth System. However, these models are based on simplifications of our understanding of nature, thus are unavoidably imperfect. Conversely, observation-based data of climatic and environmental variables are becoming increasingly accessible over large scales due to the progress of space-borne sensing technologies and data-assimilation techniques. Albeit uncertain, these data enable the possibility to start unraveling complex multivariable, multiscale relationships if the appropriate statistical methods are applied. Here, we investigate the potential of the wavelet cross-correlation method as a tool for identifying multiscale interactions, feedback and regime shifts in geophysical systems. The ability of wavelet cross-correlation to resolve the fast and slow components of coupled systems is tested on syn...

  6. Atmospheric and Geophysical Sciences Division: Program report, FY 1987

    SciTech Connect (OSTI)

    Not Available

    1988-05-01

    In 1988 the Atmospheric and Geophysical Sciences Division began its 15th year as a division. As the Division has grown over the years, its modeling capabilities have expanded to include a broad range of time and space scales ranging from hours to years, and from kilometers to global, respectively. For this report, we have chosen to show a subset of results from several projects to illustrate the breadth, depth, and diversity of the modeling activities that are a major part of the Division's research, development, and application efforts. In addition, the recent reorganization of the Division, including the merger of another group with the Division, is described, and the budget, personnel, models, and publications are reviewed. 95 refs., 26 figs., 2 tabs.

  7. Geophysical Journal International Geophys. J. Int. (2014) 197, 630635 doi: 10.1093/gji/ggu016

    E-Print Network [OSTI]

    Bodin, Thomas

    2014-01-01

    , Indonesia, from transdimensional seismic ambient noise tomography Z. Zulfakriza,1 E. Saygin,2 P. R. Cummins, Faculty of Earth Sciences and Technology, ITB, Bandung, 40132, Indonesia. E-mail: zulfakriza 3Global Geophysics Research Group, Faculty of Mining and Petroleum Engineering, ITB, Bandung, 40132

  8. College of Natural Science and Mathematics Department of Geology and Geophysics

    E-Print Network [OSTI]

    Hartman, Chris

    gEophySicS College of Natural Science and Mathematics Department of Geology and Geophysics 907 credits The geophysics program at UAF specializes in several broad areas of re- search and is closely connected with the Geophysical Institute. Although much of the research conducted by geophysics faculty

  9. Selecting surface geophysical methods for geological, hydrological, geotechnical, and environmental investigation: The rationale for the ASTM provisional guide

    SciTech Connect (OSTI)

    Saunders, W.; Benson, R.; Snelgrove, F.; Soloyanis, S.

    1999-07-01

    The ASTM Provisional Guide (PS 78-97) for Selecting Surface Geophysical Methods was developed as a guide for project managers, contractors, geologists, and geophysicists to assist in selecting the most likely geophysical method or methods to conduct specific subsurface investigations. Numerous surface geophysical methods and techniques exist that can be used to determine subsurface soil and rock properties and their distribution. These same methods are also widely used to investigate and locate manmade structures such as buried objective and landfills. This paper discusses the general uses of surface geophysics and the use of the provisional guide. This paper is not intended to be used as he guide. The ASTM Provisional Guide provides direction in selecting the most appropriate geophysical method or methods for a specific application under general site conditions. Secondary methods are also proposed that, under certain circumstances, should be evaluated before a final selection is made. Some typical conditions under which a primary or secondary method might or might not provide satisfactory results are given in the provisional guide. references for further information about selected methods and to method-specific ASTM guides are also provided. Secondary methods usually have less than desired performance, higher cost, or greater labor requirements as compared to the primary methods.

  10. Modeling and Evaluation of Geophysical Methods for Monitoring and Tracking CO2 Migration

    SciTech Connect (OSTI)

    Daniels, Jeff

    2012-11-30

    Geological sequestration has been proposed as a viable option for mitigating the vast amount of CO{sub 2} being released into the atmosphere daily. Test sites for CO{sub 2} injection have been appearing across the world to ascertain the feasibility of capturing and sequestering carbon dioxide. A major concern with full scale implementation is monitoring and verifying the permanence of injected CO{sub 2}. Geophysical methods, an exploration industry standard, are non-invasive imaging techniques that can be implemented to address that concern. Geophysical methods, seismic and electromagnetic, play a crucial role in monitoring the subsurface pre- and post-injection. Seismic techniques have been the most popular but electromagnetic methods are gaining interest. The primary goal of this project was to develop a new geophysical tool, a software program called GphyzCO2, to investigate the implementation of geophysical monitoring for detecting injected CO{sub 2} at test sites. The GphyzCO2 software consists of interconnected programs that encompass well logging, seismic, and electromagnetic methods. The software enables users to design and execute 3D surface-to-surface (conventional surface seismic) and borehole-to-borehole (cross-hole seismic and electromagnetic methods) numerical modeling surveys. The generalized flow of the program begins with building a complex 3D subsurface geological model, assigning properties to the models that mimic a potential CO{sub 2} injection site, numerically forward model a geophysical survey, and analyze the results. A test site located in Warren County, Ohio was selected as the test site for the full implementation of GphyzCO2. Specific interest was placed on a potential reservoir target, the Mount Simon Sandstone, and cap rock, the Eau Claire Formation. Analysis of the test site included well log data, physical property measurements (porosity), core sample resistivity measurements, calculating electrical permittivity values, seismic data collection, and seismic interpretation. The data was input into GphyzCO2 to demonstrate a full implementation of the software capabilities. Part of the implementation investigated the limits of using geophysical methods to monitor CO{sub 2} injection sites. The results show that cross-hole EM numerical surveys are limited to under 100 meter borehole separation. Those results were utilized in executing numerical EM surveys that contain hypothetical CO{sub 2} injections. The outcome of the forward modeling shows that EM methods can detect the presence of CO{sub 2}.

  11. Geophysical constraints on contaminant transport modeling in a heterogeneous fluvial aquifer

    E-Print Network [OSTI]

    Zheng, Chunmiao

    Geophysical constraints on contaminant transport modeling in a heterogeneous fluvial aquifer Jerry the geophysically derived hydraulic conductivity representation in numerical simulations of the natural the effectiveness of geophysically derived and flowmeter based representations of the hydraulic conductivity field

  12. Applying petroleum geophysics to astrophysics: Quantitative 4D seismic study of the solar interior

    E-Print Network [OSTI]

    Crawford, Ian

    Applying petroleum geophysics to astrophysics: Quantitative 4D seismic study, is to a significant extent based on tomographic methods developed in geophysics. The proposed time-lapse seismic methods developed in petroleum geophysics offer the next

  13. Highlights of the 2009 SEG summer research workshop on "CO2 Sequestration Geophysics"

    E-Print Network [OSTI]

    Lumley, D.

    2010-01-01

    on “CO 2 Sequestration Geophysics” David Lumley (U. W.on “CO 2 Sequestration Geophysics” was held August 23-27,sequestration: Model Studies: Geophysics, 73, WA105-WA112.

  14. Geophysical Prospecting 31,265-292, 1983. REFLECTION OF ELASTIC WAVES FROM

    E-Print Network [OSTI]

    Santos, Juan

    Geophysical Prospecting 31,265-292, 1983. REFLECTION OF ELASTIC WAVES FROM PERIODICALLY STRATIFIED from Periodically Stratified Media with Interfacial Slip, Geophysical Prospecting 31 phase propagation in some other direction. INTRODUCTION Geophysical media often exhibit anisotropic

  15. Treatise on Geophysics, 2nd Edition 00 (2014) 141 To appear in Treatise on Geophysics, 2nd Edition, Eds. T. Spohn & G. Schubert

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    2014-01-01

    Treatise on Geophysics, 2nd Edition 00 (2014) 1­41 To appear in Treatise on Geophysics, 2nd Edition Author manuscript, published in "Treatise on Geophysics, 2nd edition, G. Schubert, T. Spohn (Ed.) (2014) in press" #12;T. Guillot & D. Gautier / Treatise on Geophysics, 2nd Edition 00 (2014) 1­41 2 Contents 1

  16. A Conceptual Model Approach to the Geophysical Exploration of...

    Open Energy Info (EERE)

    and the acquisition environment too challenging for seismic reflection to be routinely cost-effective. The geophysical parameter most commonly correlated with the overall...

  17. Advanced 3D Geophysical Imaging Technologies for Geothermal Resource Characterization

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. This project aims to develop improved geophysical imaging method for characterizing subsurface structure, identify fluid locations, and characterize fractures.

  18. Geophysical logging case history of the Raft River geothermal...

    Open Energy Info (EERE)

    5490655 Citation Applegate, J. K.; Moens, T. A. . 411980. Geophysical logging case history of the Raft River geothermal system, Idaho. () : DOE Information Bridge. Related...

  19. Role of borehole geophysics in defining the physical characteristics...

    Open Energy Info (EERE)

    Role of borehole geophysics in defining the physical characteristics of the Raft River geothermal reservoir, Idaho Jump to: navigation, search OpenEI Reference LibraryAdd to...

  20. Advanced 3D Geophysical Imaging Technologies for Geothermal Resource Characterization

    E-Print Network [OSTI]

    Zhang, Haijiang

    2012-01-01

    We describe the ongoing development of joint geophysical imaging methodologies for geothermal site characterization and demonstrate their potential in two regions: Krafla volcano and associated geothermal fields in ...

  1. Geophysical Setting of the Blue Mountain Geothermal Area, North...

    Open Energy Info (EERE)

    Geophysical Setting of the Blue Mountain Geothermal Area, North-Central Nevada and Its Relationship to a Crustal-Scale Fracture Associated with the Inception of the Yellowstone...

  2. Exoplanetary Geophysics -- An Emerging Discipline

    E-Print Network [OSTI]

    Laughlin, Gregory

    2015-01-01

    Thousands of extrasolar planets have been discovered, and it is clear that the galactic planetary census draws on a diversity greatly exceeding that exhibited by the solar system's planets. We review significant landmarks in the chronology of extrasolar planet detection, and we give an overview of the varied observational techniques that are brought to bear. We then discuss the properties of the currently known distribution, using the mass-period diagram as a guide to delineating hot Jupiters, eccentric giant planets, and a third, highly populous, category that we term "ungiants", planets having masses less than 30 Earth masses and orbital periods less than 100 days. We then move to a discussion of the bulk compositions of the extrasolar planets. We discuss the long-standing problem of radius anomalies among giant planets, as well as issues posed by the unexpectedly large range in sizes observed for planets with masses somewhat greater than Earth's. We discuss the use of transit observations to probe the atmo...

  3. Publications of the Hawaii Institute of Geophysics and Planetology University of Hawaii

    E-Print Network [OSTI]

    Publications of the Hawaii Institute of Geophysics and Planetology University of Hawaii 2000 1 Sensing Volcanism, Remote Sensing of Active Volcanism, AGU Geophysical Monograph Series 116, Mouginis

  4. 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...

  5. DALHOUSIE UNIVERSITY, DEPARTMENT OF EARTH SCIENCES Assistant Professor -Geophysics, Sedimentology, or Geochemistry

    E-Print Network [OSTI]

    Brownstone, Rob

    DALHOUSIE UNIVERSITY, DEPARTMENT OF EARTH SCIENCES Assistant Professor - Geophysics, Sedimentology position in Geophysics, Sedimentology, or Geochemistry. The appointment is probationary tenure

  6. Identification and Characterization of Hydrogeologic Units at the Nevada Test Site Using Geophysical Logs: Examples from the Underground Test Area Project

    SciTech Connect (OSTI)

    Lance Prothro, Sigmund Drellack, Margaret Townsend

    2009-03-25

    The diverse and complex geology of the Nevada Test Site region makes for a challenging environment for identifying and characterizing hydrogeologic units penetrated by wells drilled for the U.S. Department of Energy, National Nuclear Security Administration, Underground Test Area (UGTA) Environmental Restoration Sub-Project. Fortunately, UGTA geoscientists have access to large and robust sets of subsurface geologic data, as well as a large historical knowledge base of subsurface geological analyses acquired mainly during the underground nuclear weapons testing program. Of particular importance to the accurate identification and characterization of hydrogeologic units in UGTA boreholes are the data and interpretation principles associated with geophysical well logs. Although most UGTA participants and stakeholders are probably familiar with drill hole data such as drill core and cuttings, they may be less familiar with the use of geophysical logs; this document is meant to serve as a primer on the use of geophysical logs in the UGTA project. Standard geophysical logging tools used in the UGTA project to identify and characterize hydrogeologic units are described, and basic interpretation principles and techniques are explained. Numerous examples of geophysical log data from a variety of hydrogeologic units encountered in UGTA wells are presented to highlight the use and value of geophysical logs in the accurate hydrogeologic characterization of UGTA wells.

  7. GEOPHYSICAL JOURNAL INTERNATIONAL, 133, 379389, 1998 1 A continuous plate-tectonic model using geophysical data

    E-Print Network [OSTI]

    GEOPHYSICAL JOURNAL INTERNATIONAL, 133, 379­389, 1998 1 A continuous plate-tectonic model using and Technology, University of Hawaii, Honolulu, 96822, USA Summary A continuous kinematic model of present day of the standard plate model; the differences, however, are systematic and indicate the greater proportion of spin

  8. FOURIER TRANSFORM METHODS IN GEOPHYSICS David Sandwell, January, 2013

    E-Print Network [OSTI]

    Sandwell, David T.

    1 FOURIER TRANSFORM METHODS IN GEOPHYSICS David Sandwell, January, 2013 1. Fourier Transforms Fourier transform are use in many areas of geophysics such as image processing, time series analysis, and antenna design. Here we focus on the use of fourier transforms for solving linear partial differential

  9. PETER LEE OLSON Present Position: Professor of Geophysical Fluid Dynamics

    E-Print Network [OSTI]

    Olson, Peter L.

    Power Plant Siting Program Scientific Steering Panel, NASA GRM mission University Corporation of California, Berkeley, California M.A. Geophysics, June 1974, University of California, Berkeley, California B of California, Berkeley (1980) Assistant Professor of Geophysical Fluid Dynamics, Johns Hopkins University

  10. PETER LEE OLSON Present Position: Professor of Geophysical Fluid Dynamics

    E-Print Network [OSTI]

    Olson, Peter L.

    Union, Tectonophysics Section Scientific Advisory Board, Maryland Power Plant Siting Program Scientific Dynamics EDUCATION: Ph.D. Geophysics, June 1977, University of California, Berkeley, California M.A. Geophysics, June 1974, University of California, Berkeley, California B.A. Geology, June 1972, University

  11. PETER LEE OLSON Present Position: Professor of Geophysical Fluid Dynamics

    E-Print Network [OSTI]

    Olson, Peter L.

    Union, Tectonophysics Section Scientific Advisory Board, Maryland Power Plant Siting Program Scientific of California, Berkeley, California M.A. Geophysics, June 1974, University of California, Berkeley, California B of California, Berkeley (1980) Assistant Professor of Geophysical Fluid Dynamics, Johns Hopkins University

  12. Geology and Geophysics College of Science code-BS

    E-Print Network [OSTI]

    Kihara, Daisuke

    Geology and Geophysics College of Science code-BS Code-GEOP 120 Credits "C-"or better required Professional Elective (3xxxx and above) (6) EAPS 49000 Geology Field Experience (summer) (3) Science ******************************************************************************************************************************** (effective Fall 2013) #12;Geology and Geophysics Fall 2015 Department of Earth, Atmospheric, and Planetary

  13. Geology and Geophysics College of Science code-BS

    E-Print Network [OSTI]

    Kihara, Daisuke

    Geology and Geophysics College of Science code-BS Code-GEOP 120 Credits "C-"or better required Geology Field Experience (summer) (3) Science/Engineering Elective (2xxxx or above) (3) Science ******************************************************************************************************************************** (effective Fall 2013) #12;Geology and Geophysics http

  14. Geology and Geophysics College of Science code-BS

    E-Print Network [OSTI]

    Kihara, Daisuke

    Geology and Geophysics College of Science code-BS Code-GEOP 120 Credits "C-"or better required Professional Elective (3xxxx and above) (6) EAPS 49000 Geology Field Experience (summer) (3) Science ******************************************************************************************************************************** (effective Fall 2013) #12;Geology and Geophysics Fall 2014 Department of Earth, Atmospheric, and Planetary

  15. Missouri University of Science and Technology 1 Geology and Geophysics

    E-Print Network [OSTI]

    Missouri-Rolla, University of

    Missouri University of Science and Technology 1 Geology and Geophysics Graduate work in Geology are designed to provide you with an understanding of the fundamentals and principles of geology, geochemistry and Environmental Geochemistry · Mineralogy/Petrology/Economic Geology · Geophysics/Tectonics/Remote Sensing

  16. New perspectives on superparameterization for geophysical turbulence

    SciTech Connect (OSTI)

    Majda, Andrew J.; Grooms, Ian

    2014-08-15

    This is a research expository paper regarding superparameterization, a class of multi-scale numerical methods designed to cope with the intermittent multi-scale effects of inhomogeneous geophysical turbulence where energy often inverse-cascades from the unresolved scales to the large scales through the effects of waves, jets, vortices, and latent heat release from moist processes. Original as well as sparse space–time superparameterization algorithms are discussed for the important case of moist atmospheric convection including the role of multi-scale asymptotic methods in providing self-consistent constraints on superparameterization algorithms and related deterministic and stochastic multi-cloud parameterizations. Test models for the statistical numerical analysis of superparameterization algorithms are discussed both to elucidate the performance of the basic algorithms and to test their potential role in efficient multi-scale data assimilation. The very recent development of grid-free seamless stochastic superparameterization methods for geophysical turbulence appropriate for “eddy-permitting” mesoscale ocean turbulence is presented here including a general formulation and illustrative applications to two-layer quasigeostrophic turbulence, and another difficult test case involving one-dimensional models of dispersive wave turbulence. This last test case has randomly generated solitons as coherent structures which collapse and radiate wave energy back to the larger scales, resulting in strong direct and inverse turbulent energy cascades.

  17. CURRICULUM VITAE TARJE NISSEN-MEYER address: ETH Zurich, Institute of Geophysics

    E-Print Network [OSTI]

    Nissen-Meyer, Tarje

    CURRICULUM VITAE TARJE NISSEN-MEYER address: ETH Zurich, Institute of Geophysics Sonneggstrasse 5: ++41 (0) 44 633 3154 fax: ++41 (0) 44 633 1065 AUGUST 5, 2010 Education 2007 Ph.D. Geophysics in field geology, mathematics, seismology, geodynamics, geophysics 2001 Diplom Geophysics (M

  18. Expedited Site Characterization geophysics: Geophysical methods and tools for site characterization

    SciTech Connect (OSTI)

    Goldstein, N.E.

    1994-03-01

    This report covers five classes of geophysical technologies: Magnetics; Electrical/electromagnetic; Seismic reflection; Gamma-ray spectrometry; and Metal-specific spectrometry. Except for radiometry, no other classes of geophysical tedmologies are specific for direct detection of the types of contaminants present at the selected sites. For each of the five classes covered, the report gives a general description of the methodology, its field use, and its general applicability to the ESC Project. In addition, the report gives a sample of the most promising instruments available for each class, including the following information: Hardware/software attributes; Purchase and rental costs; Survey rate and operating costs; and Other applicable information based on case history and field evaluations.

  19. Geophysical subsurface imaging and interface identification.

    SciTech Connect (OSTI)

    Pendley, Kevin; Bochev, Pavel Blagoveston; Day, David Minot; Robinson, Allen Conrad; Weiss, Chester Joseph

    2005-09-01

    Electromagnetic induction is a classic geophysical exploration method designed for subsurface characterization--in particular, sensing the presence of geologic heterogeneities and fluids such as groundwater and hydrocarbons. Several approaches to the computational problems associated with predicting and interpreting electromagnetic phenomena in and around the earth are addressed herein. Publications resulting from the project include [31]. To obtain accurate and physically meaningful numerical simulations of natural phenomena, computational algorithms should operate in discrete settings that reflect the structure of governing mathematical models. In section 2, the extension of algebraic multigrid methods for the time domain eddy current equations to the frequency domain problem is discussed. Software was developed and is available in Trilinos ML package. In section 3 we consider finite element approximations of De Rham's complex. We describe how to develop a family of finite element spaces that forms an exact sequence on hexahedral grids. The ensuing family of non-affine finite elements is called a van Welij complex, after the work [37] of van Welij who first proposed a general method for developing tangentially and normally continuous vector fields on hexahedral elements. The use of this complex is illustrated for the eddy current equations and a conservation law problem. Software was developed and is available in the Ptenos finite element package. The more popular methods of geophysical inversion seek solutions to an unconstrained optimization problem by imposing stabilizing constraints in the form of smoothing operators on some enormous set of model parameters (i.e. ''over-parametrize and regularize''). In contrast we investigate an alternative approach whereby sharp jumps in material properties are preserved in the solution by choosing as model parameters a modest set of variables which describe an interface between adjacent regions in physical space. While still over-parametrized, this choice of model space contains far fewer parameters than before, thus easing the computational burden, in some cases, of the optimization problem. And most importantly, the associated finite element discretization is aligned with the abrupt changes in material properties associated with lithologic boundaries as well as the interface between buried cultural artifacts and the surrounding Earth. In section 4, algorithms and tools are described that associate a smooth interface surface to a given triangulation. In particular, the tools support surface refinement and coarsening. Section 5 describes some preliminary results on the application of interface identification methods to some model problems in geophysical inversion. Due to time constraints, the results described here use the GNU Triangulated Surface Library for the manipulation of surface meshes and the TetGen software library for the generation of tetrahedral meshes.

  20. MODELING COUPLED FLUID FLOW AND GEOMECHANICAL AND GEOPHYSICAL PHENOMENA WITHIN

    E-Print Network [OSTI]

    MODELING COUPLED FLUID FLOW AND GEOMECHANICAL AND GEOPHYSICAL PHENOMENA WITHIN A FINITE ELEMENT for the modeling of geomechanical effects induced by reservoir production/injection and the cyclic dependence

  1. A Geological And Geophysical Appraisal Of The Baca Geothermal...

    Open Energy Info (EERE)

    A Geological And Geophysical Appraisal Of The Baca Geothermal Field, Valles Caldera, New Mexico Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article:...

  2. A Geothermal Field Model Based On Geophysical And Thermal Prospectings...

    Open Energy Info (EERE)

    Field Model Based On Geophysical And Thermal Prospectings In Nea Kessani (Ne Greece) Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: A...

  3. GEOPHYSICAL RESEARCH LETTERS Supporting Information for "Eddy-mediated

    E-Print Network [OSTI]

    Stewart, Andrew

    GEOPHYSICAL RESEARCH LETTERS Supporting Information for "Eddy-mediated transport of warm, and over- turning circulation. 1 Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, California, USA. 2 Environmental Sciences and Engineering, California

  4. Mike Batzle holds the Baker Hughes Distinguished Chair of Petrophysics and Borehole Geophysics, at the Colorado School of Mines, where he has been a member of the geophysics

    E-Print Network [OSTI]

    Mike Batzle holds the Baker Hughes Distinguished Chair of Petrophysics and Borehole Geophysics, at the Colorado School of Mines, where he has been a member of the geophysics department for the past 17 years from the University of California, Riverside, and a PhD in geophysics from MIT. His main interests have

  5. REVIEWSOF GEOPHYSICS,VOL. 25, NO. 2, PAGES153-161, MARCH1987 U.S. NATIONAL REPORT TO INTERNATIONAL UNION OF GEODESY AND GEOPHYSICS 1983-1986

    E-Print Network [OSTI]

    Dozier, Jeff

    REVIEWSOF GEOPHYSICS,VOL. 25, NO. 2, PAGES153-161, MARCH1987 U.S. NATIONAL REPORT TO INTERNATIONAL UNION OF GEODESY AND GEOPHYSICS 1983-1986 RecentResearchin SnowHydrology JEFF DOZIER Centerfor Remote thespectraldistri- butionof the incomingsolardirectanddiffuseirradianceand thespectralalbedo: Copyfight1987bytheAmericanGeophysical

  6. GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS, VOL. ???, XXXX, DOI:10.1029/, The influence of non-uniform ambient noise on1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS, VOL. ???, XXXX, DOI:10.1029/, The influence of non, Institute of Geophysics, ETH Zurich, Sonneggstrasse 5, Zurich, Switzerland. T. Nissen-Meyer, Institute of Geophysics, ETH Zurich, Sonneggstrasse 5, Zurich, Switzerland. Olaf Schenk, Institute of Computational

  7. A Feasibility Study of Non-Seismic Geophysical Methods forMonitoring Geologic CO2 Sequestration

    SciTech Connect (OSTI)

    Gasperikova, Erika; Hoversten, G. Michael

    2006-07-01

    Because of their wide application within the petroleumindustry it is natural to consider geophysical techniques for monitoringof CO2 movement within hydrocarbon reservoirs, whether the CO2 isintroduced for enhanced oil/gas recovery or for geologic sequestration.Among the available approaches to monitoring, seismic methods are by farthe most highly developed and applied. Due to cost considerations, lessexpensive techniques have recently been considered. In this article, therelative merits of gravity and electromagnetic (EM) methods as monitoringtools for geological CO2 sequestration are examined for two syntheticmodeling scenarios. The first scenario represents combined CO2 enhancedoil recovery (EOR) and sequestration in a producing oil field, theSchrader Bluff field on the north slope of Alaska, USA. The secondscenario is a simplified model of a brine formation at a depth of 1,900m.

  8. Understanding biogeobatteries: Where geophysics meets microbiology

    SciTech Connect (OSTI)

    Revil, A.; Mendonca, C.A.; Atekwana, E.A.; Kulessa, B.; Hubbard, S.S.; Bohlen, K.

    2009-08-15

    Although recent research suggests that contaminant plumes behave as geobatteries that produce an electrical current in the ground, no associated model exists that honors both geophysical and biogeochemical constraints. Here, we develop such a model to explain the two main electrochemical contributions to self-potential signals in contaminated areas. Both contributions are associated with the gradient of the activity of two types of charge carriers, ions and electrons. In the case of electrons, bacteria act as catalysts for reducing the activation energy needed to exchange the electrons between electron donor and electron acceptor. Possible mechanisms that facilitate electron migration include iron oxides, clays, and conductive biological materials, such as bacterial conductive pili or other conductive extracellular polymeric substances. Because we explicitly consider the role of biotic processes in the geobattery model, we coined the term 'biogeobattery'. After theoretical development of the biogeobattery model, we compare model predictions with self-potential responses associated with laboratory and field-scale conducted in contaminated environments. We demonstrate that the amplitude and polarity of large (>100 mV) self-potential signatures requires the presence of an electronic conductor to serve as a bridge between electron donors and acceptors. Small self-potential anomalies imply that electron donors and electron acceptors are not directly interconnected, but instead result simply from the gradient of the activity of the ionic species that are present in the system.

  9. Geophysical Research Abstracts Vol. 12, EGU2010-4777-1, 2010

    E-Print Network [OSTI]

    Boyer, Edmond

    Geophysical Research Abstracts Vol. 12, EGU2010-4777-1, 2010 EGU General Assembly 2010 © Author" River and the damage caused can create routes for floods. Geophysical methods such as Multi

  10. Geophysical Investigations of the Mound City Borrow Pits, Ross County, Ohio

    E-Print Network [OSTI]

    Benson, Blair

    2012-05-31

    Geophysical subsurface imaging is becoming a common practice in archaeology. Non-invasive geophysical methods provide efficient alternatives to costly and invasive excavations, allowing archaeologists to analyze sites before any excavation is done...

  11. Publications of the Hawaii Institute of Geophysics and Planetology University of Hawaii

    E-Print Network [OSTI]

    Publications of the Hawaii Institute of Geophysics and Planetology University of Hawaii 2003 1 volcanic collapse formation, Geochemistry, Geophysics, Geosystems, 4 (9), 1077, doi:10.1029/2002GC000483

  12. Smithsonian/NASA ADS Physics/Geophysics Abstract Service Find Similar Abstracts (with default settings below)

    E-Print Network [OSTI]

    Mojahedi, Mohammad

    Smithsonian/NASA ADS Physics/Geophysics Abstract Service · Find Similar Abstracts (with default | Query Form | Preferences | HELP | FAQ Physics/Geophysics arXiv e-prints Send Query Reset #12;

  13. Publications of the Hawaii Institute of Geophysics and Planetology University of Hawaii

    E-Print Network [OSTI]

    Publications of the Hawaii Institute of Geophysics and Planetology University of Hawaii 2005 1. 2 craters. Journal of Geophysical Research 110, E10001, doi: 10.1029/2004JE002338, 2005. 7. Blewett, D. T

  14. Well casing-based geophysical sensor apparatus, system and method

    DOE Patents [OSTI]

    Daily, William D. (Livermore, CA)

    2010-03-09

    A geophysical sensor apparatus, system, and method for use in, for example, oil well operations, and in particular using a network of sensors emplaced along and outside oil well casings to monitor critical parameters in an oil reservoir and provide geophysical data remote from the wells. Centralizers are affixed to the well casings and the sensors are located in the protective spheres afforded by the centralizers to keep from being damaged during casing emplacement. In this manner, geophysical data may be detected of a sub-surface volume, e.g. an oil reservoir, and transmitted for analysis. Preferably, data from multiple sensor types, such as ERT and seismic data are combined to provide real time knowledge of the reservoir and processes such as primary and secondary oil recovery.

  15. GEOPHYSICAL INVERSION IN AN INTEGRATED EXPLORATION PROGRAM: EXAMPLES FROM THE SAN NICOL AS DEPOSIT

    E-Print Network [OSTI]

    Oldenburg, Douglas W.

    GEOPHYSICAL INVERSION IN AN INTEGRATED EXPLORATION PROGRAM: EXAMPLES FROM THE SAN NICOL ´AS DEPOSIT information to the explorationist. This thesis examines the role geophysical inversion can assume in an integrated explo- ration program, and the impact it can have on the results. As an example, geophysical data

  16. Publications of the Hawaii Institute of Geophysics and Planetology University of Hawaii

    E-Print Network [OSTI]

    Publications of the Hawaii Institute of Geophysics and Planetology University of Hawaii 2006 1 with an albedo feature near Airy crater in the lunar nearside highlands. Geophysical Research Letters. 9. Boyce viewed by the THEMIS instrument: Double-layered ejecta craters. J. Geophysical Research, 111, E10005, doi

  17. Geophysical Journal International Geophys. J. Int. (2013) doi: 10.1093/gji/ggt425

    E-Print Network [OSTI]

    Nore, Caroline

    2013-01-01

    Geophysical Journal International Geophys. J. Int. (2013) doi: 10.1093/gji/ggt425 GJIGeomagnetismInstitute of Geophysics, ETH Zurich, Zurich 8092, Switzerland. E-mail: ajackson@ethz.ch 2Institute of Geophysics, University of G¨ottingen, D-37077 G¨ottingen, Germany 3Solar Physics, Hansen Experimental Physics

  18. Geophysical and Astrophysical Fluid Dynamics, Vol. 101, Nos. 56, OctoberDecember 2007, 469487

    E-Print Network [OSTI]

    Lathrop, Daniel P.

    Geophysical and Astrophysical Fluid Dynamics, Vol. 101, Nos. 5­6, October­December 2007, 469, USA zInstitute of Geophysics, University of Go¨ ttingen, Friedrich-Hund-Platz 1, D-37077 Go¨ ttingen (though later work by Banka and *Corresponding author. Email: dpl@complex.umd.edu Geophysical

  19. Multifractals and Wavelets: A potential tool in Geophysics Rudolf H. Riedi, Rice University, Houston, Texas

    E-Print Network [OSTI]

    Riedi, Rudolf H.

    Multifractals and Wavelets: A potential tool in Geophysics Rudolf H. Riedi, Rice University of pos- sible applications in geophysics. It is elaborated how a description of the well log measurement to the mentioned elds. This paper is written in the hope of achieving the same in the area of geophysics. The idea

  20. Northern Thailand Geophysics Field Camp: Overview of Activities Lee M. Liberty

    E-Print Network [OSTI]

    Barrash, Warren

    Northern Thailand Geophysics Field Camp: Overview of Activities Lee M. Liberty Boise State University conducted a geophysics field camp in northern Thailand in January, 2010 to train students and professionals in geophysical methods to address environmental and engineering challenges. Faculty, technicians

  1. GEOPHYSICS?[The application of physics to problems in the Earth Sciences.

    E-Print Network [OSTI]

    Merriam, James

    W HAT IS GEOPHYSICS?[The application of physics to problems in the Earth Sciences.] In applied geophysics we inject a signal into the ground and record how the ground changes that signal as it passes://duke.usask.ca~merriam/geo_phys/ Rewarding careers are possible in exploration and environmental geophysics. Graduates of the U of S qualify

  2. Geophysical methods applied to characterize landfill covers with geocomposite F. Genelle1, 2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Geophysical methods applied to characterize landfill covers with geocomposite F. Genelle1, 2 , C attempt to characterize with geophysical methods the state of landfill covers to detect damages that can. The geophysical methods used were the Electrical Resistivity Tomography (ERT), cartography with an Automatic

  3. Geophysical Surveying with Marine Networked Mobile Robotic Systems: The WiMUST Project

    E-Print Network [OSTI]

    Jesus, Sérgio M.

    Geophysical Surveying with Marine Networked Mobile Robotic Systems: The WiMUST Project [Extended for geophysical surveying. This paper describes the main features of the envisaged developments, with a focus.00. Figure 1: Conventional geophysical surveying using long lines of towed streamers team. Such teams

  4. Bachelor of Science, Geosciences, Geophysics Emphasis, 2014-2015 Name ID# Date

    E-Print Network [OSTI]

    Barrash, Warren

    Bachelor of Science, Geosciences, Geophysics Emphasis, 2014-2015 Name ID# Date General Degree General Chemistry II with Lab 4 GEOPH 201 Seeing the Unseen: an Introduction to Geophysics 4 GEOG 360 Physics I & II with Calculus & Labs Physics Option II: PHYS 111-112 General Physics 8-10 Geophysics

  5. UNIVERSITY OF HAWAII AT MANOA GEOLOGY AND GEOPHYSICS GRADUATE PROGRAM SUPPLEMENTAL INFORMATION FORM

    E-Print Network [OSTI]

    UNIVERSITY OF HAWAII AT MANOA · GEOLOGY AND GEOPHYSICS GRADUATE PROGRAM SUPPLEMENTAL INFORMATION of Geology and Geophysics, University of Hawaii, 1680 East-West Road, POST 701, Honolulu, HI 96822 For Semester/YEAR FALL ________ SPRING ________ Intended Graduate Program GEOLOGY AND GEOPHYSICS Degree

  6. Group X

    SciTech Connect (OSTI)

    Fields, Susannah

    2007-08-16

    This project is currently under contract for research through the Department of Homeland Security until 2011. The group I was responsible for studying has to remain confidential so as not to affect the current project. All dates, reference links and authors, and other distinguishing characteristics of the original group have been removed from this report. All references to the name of this group or the individual splinter groups has been changed to 'Group X'. I have been collecting texts from a variety of sources intended for the use of recruiting and radicalizing members for Group X splinter groups for the purpose of researching the motivation and intent of leaders of those groups and their influence over the likelihood of group radicalization. This work included visiting many Group X websites to find information on splinter group leaders and finding their statements to new and old members. This proved difficult because the splinter groups of Group X are united in beliefs, but differ in public opinion. They are eager to tear each other down, prove their superiority, and yet remain anonymous. After a few weeks of intense searching, a list of eight recruiting texts and eight radicalizing texts from a variety of Group X leaders were compiled.

  7. Three-Year Non-Tenure Track Visiting Assistant Professor Position Geophysics -The University of Alabama Department of Geological

    E-Print Network [OSTI]

    Zheng, Chunmiao

    Three-Year Non-Tenure Track Visiting Assistant Professor Position ­ Geophysics - The University of Alabama invites applications for a three-year, non-tenure track visiting faculty position in geophysics geophysical sub-disciplines, preference will be given to candidates who will enhance our existing geophysics

  8. Book Series Copyright 2004 by the American Geophysical Union

    E-Print Network [OSTI]

    Xie, Shang-Ping

    ocean currents/fronts. Finally, various atmospheric and oceanic bridges that link different ocean basinsBook Title Book Series Copyright 2004 by the American Geophysical Union 1 A Global Survey of Ocean, College Park, Maryland The interaction of the ocean and atmosphere plays an important role in shaping

  9. Marine Geophysical Research An International Journal for the Study of

    E-Print Network [OSTI]

    Clift, Peter

    1 23 Marine Geophysical Research An International Journal for the Study of the Earth Beneath just prior to full break-up. We identify a major continental block separated from the shelf margin by a basin of hyperextended crust. Oligocene-Early Miocene rifting was followed by mild compression

  10. Nonlinear Processes in Geophysics (2001) 8: 429438 Nonlinear Processes

    E-Print Network [OSTI]

    Boyer, Edmond

    2001-01-01

    Geophysical Society 2001 Mesoscale predictability under various synoptic regimes W. A. Nuss and D. K. Miller slightly ro- tated terrain are compared to gauge the sentivity of mesoscale forecasts to small forecast errors on the mesoscale in both wind and precipitation. The largest mesoscale errors occur when

  11. Surface OceanLower Atmosphere Processes Geophysical Research Series 187

    E-Print Network [OSTI]

    Kohfeld, Karen

    , British Columbia, Canada Andy Ridgwell Bristol Research Initiative for the Dynamic Global Environment251 Surface Ocean­Lower Atmosphere Processes Geophysical Research Series 187 Copyright 2009, and processes have been identified that have improved our understanding of the modern and future carbon cycle

  12. Recent advances in optimized geophysical survey design Hansruedi Maurer1

    E-Print Network [OSTI]

    method. In contrast, an underdetermined 2D seismic traveltime tomog- raphy design study indicates subsurface information as the full bandwidth.Anon- linear experimental design for a seismic amplitudeRecent advances in optimized geophysical survey design Hansruedi Maurer1 , Andrew Curtis2

  13. 2 Geophysical Aspects of Non-Newtonian Fluid Mechanics

    E-Print Network [OSTI]

    Balmforth, Neil

    2 Geophysical Aspects of Non-Newtonian Fluid Mechanics N.J. Balmforth1 and R.V. Craster2 1, London, SW7 2BZ, UK 2.1 Introduction Non-Newtonian fluid mechanics is a vast subject that has several journals partly, or primarily, dedicated to its investigation (Journal of Non-Newtonian Fluid Mechanics

  14. Geophysical implications of the longwavelength topography of Rhea

    E-Print Network [OSTI]

    Nimmo, Francis

    Geophysical implications of the longwavelength topography of Rhea F. Nimmo,1 B. G. Bills,2 P. C 16 October 2010. [1] We use limb profiles to investigate the longwavelength topography topography of Rhea. The degree 3 topography is large enough, if uncompensated, to contaminate estimates

  15. Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations Cedex 02, France. 2 GeoForschungsZentrum Potsdam - Section 2.2, 14473 Potsdam, Germany. 3 Iceland GeoSurvey - ISOR , 108 Reykjavík, Iceland Abstract Structural features of volcanic and hydrothermal systems can

  16. Seismic petrophysics: An applied science for reservoir geophysics

    E-Print Network [OSTI]

    Seismic petrophysics: An applied science for reservoir geophysics WAYNE D. PENNINGTON, Michigan a number of seismic attributes, using either prestack or poststack data, or even both in combination's intuition and, per- haps, wishful thinking, as a guide. This short paper introduces a new term "seismic

  17. Recovery Act Validation of Innovative Exploration Techniques Pilgrim Hot Springs, Alaska

    SciTech Connect (OSTI)

    Holdmann, Gwen

    2015-04-30

    Drilling and temperature logging campaigns between the late 1970's and early 1980’s measured temperatures at Pilgrim Hot Springs in excess of 90°C. Between 2010 and 2014 the University of Alaska used a variety of methods including geophysical surveys, remote sensing techniques, heat budget modeling, and additional drilling to better understand the resource and estimate the available geothermal energy.

  18. Electrochemical Techniques

    SciTech Connect (OSTI)

    Chen, Gang; Lin, Yuehe

    2008-07-20

    Sensitive and selective detection techniques are of crucial importance for capillary electrophoresis (CE), microfluidic chips, and other microfluidic systems. Electrochemical detectors have attracted considerable interest for microfluidic systems with features that include high sensitivity, inherent miniaturization of both the detection and control instrumentation, low cost and power demands, and high compatibility with microfabrication technology. The commonly used electrochemical detectors can be classified into three general modes: conductimetry, potentiometry, and amperometry.

  19. Measurement techniques

    SciTech Connect (OSTI)

    Willis, W.L.

    1980-10-01

    The discussion will be restricted to measurements of voltage and current. Also, although the measurements themselves should be as quantitative as possible, the discussion is rather nonquantitative. Emphasis is on types of instruments, how they may be used, and the inherent advantages and limitations of a given technique. A great deal of information can be obtained from good, clean voltage and current data. Power and impedance are obviously inherent if the proper time relationships are preserved. Often an associated, difficult-to-determine, physical event can be evaluated from the V-I data, such as a time-varying load characteristic, or the time of light emission, etc. The lack of active high voltage devices, such as 50-kV operational amplifiers, restricts measurement devices to passive elements, primarily R and C. There are a few more exotic techniques that are still passive in nature. There are several well-developed techniques for voltage measurements. These include: spark gaps; electrostatic meters; capacitive dividers; mixed RC dividers; and the electro-optic effect. Current is measured by either direct measurement of charge flow or by measuring the resulting magnetic field.

  20. Geophysics-based method of locating a stationary earth object

    DOE Patents [OSTI]

    Daily, Michael R. (Albuquerque, NM); Rohde, Steven B. (Corrales, NM); Novak, James L. (Albuquerque, NM)

    2008-05-20

    A geophysics-based method for determining the position of a stationary earth object uses the periodic changes in the gravity vector of the earth caused by the sun- and moon-orbits. Because the local gravity field is highly irregular over a global scale, a model of local tidal accelerations can be compared to actual accelerometer measurements to determine the latitude and longitude of the stationary object.

  1. Geophysical constraint on a relic background of the dilatons

    E-Print Network [OSTI]

    Sachie Shiomi

    2010-10-15

    According to a scenario in string cosmology, a relic background of light dilatons can be a significant component of the dark matter in the Universe. A new approach of searching for such a dilatonic background by observing Earth's surface gravity was proposed in my previous work. In this paper, the concept of the geophysical search is briefly reviewed, and the geophysical constraint on the dilaton background is presented as a function of the strength of the dilaton coupling, $q_b^2$. For simplicity, I focus on massless dilatons and assume a simple Earth model. With the current upper limit on $q_b^2$, we obtain the upper limit on the dimensionless energy density of the massless background, $\\Omega_{DW}h^2_{100} \\leq 6 \\times 10^{-7}$, which is about one-order of magnitude more stringent than the one from astrophysical observations, at the frequency of $\\sim$ 7 $\\times$ 10$^{-5}$ Hz. If the magnitude of $q_b^2$ is experimentally found to be smaller than the current upper limit by one order of magnitude, the geophysical upper limit on $\\Omega_{DW}h^2_{100}$ becomes less stringent and comparable to the one obtained from the astrophysical observations.

  2. THE BC CRIBS & TRENCHES GEOPHYSICAL CHARACTERIZATION PROJECT ONE STEP FORWARD IN HANFORDS CLEANUP PROCESS

    SciTech Connect (OSTI)

    BENECKE, M.W.

    2005-11-17

    A geophysical characterization project was conducted at the BC Cribs and Trenches Area, located south of 200 East at the Hanford Site. The area consists of 26 waste disposal trenches and cribs, which received approximately 30 million gallons of liquid waste from the uranium recovery process and the ferrocyanide processes associated with wastes generated by reprocessing nuclear fuel. Waste discharges to BC Cribs contributed perhaps the largest liquid fraction of contaminants to the ground in the 200 Areas. The site also includes possibly the largest inventory of Tc-99 ever disposed to the soil at Hanford with an estimated quantity of 400 Ci. Other waste constituents included high volumes of nitrate and U-238. The geophysical characterization at the 50-acre site primarily included high resolution resistivity (HRR). The resistivity technique is a non-invasive method by which electrical resistivity data are collected along linear transects, and data are presented as continuous profiles of subsurface electrical properties. The transects ranged in size from about 400-700 meters and provided information down to depths of 60 meters. The site was characterized by a network of 51 HRR lines with a total of approximately 19.7 line kilometers of data collected parallel and perpendicular to the trenches and cribs. The data were compiled to form a three-dimensional representation of low resistivity values. Low resistivity, or high conductivity, is indicative of high ionic strength soil and porewater resulting from the migration of nitrate and other inorganic constituents through the vadose zone. High spatial density soil data from a single borehole, that included coincident nitrate concentrations, electrical conductivity. and Tc-99, were used to transform the electrical resistivity data into a nitrate plume. The plume was shown to extend laterally beyond the original boundaries of the waste site and, in one area, to depths that exceeded the characterization strategy.

  3. THE BC CRIBS & TRENCHES GEOPHYSICAL CHARACTERIZATION PROJECT ONE STEP FORWARD IN HANFORDS CLEANUP PROCESS

    SciTech Connect (OSTI)

    BENECKE, MN.W.

    2006-02-22

    A geophysical characterization project was conducted at the BC Cribs and Trenches Area, located south of 200 East at the Hanford Site. The area consists of 26 waste disposal trenches and cribs, which received approximately 30 million gallons of liquid waste from the uranium recovery process and the ferrocyanide processes associated with wastes generated by reprocessing nuclear fuel. Waste discharges to BC Cribs contributed perhaps the largest liquid fraction of contaminants to the ground in the 200 Areas. The site also includes possibly the largest inventory of Tc-99 ever disposed to the soil at Hanford with an estimated quantity of 400 Ci. Other waste constituents included high volumes of nitrate and U-238. The geophysical characterization at the 50 acre site primarily included high resolution resistivity (HRR). The resistivity technique is a non-invasive method by which electrical resistivity data are collected along linear transects, and data are presented as continuous profiles of subsurface electrical properties. The transects ranged in size from about 400-700 meters and provided information down to depths of 60 meters. The site was characterized by a network of 51 HRR lines with a total of approximately 19.7 line kilometers of data collected parallel and perpendicular to the trenches and cribs. The data were compiled to form a three-dimensional representation of low resistivity values. Low resistivity, or high conductivity, is indicative of high ionic strength soil and porewater resulting from the migration of nitrate and other inorganic constituents through the vadose zone. High spatial density soil data from a single borehole, that included coincident nitrate concentrations, electrical conductivity, and Tc-99, were used to transform the electrical resistivity data into a nitrate plume. The plume was shown to extend laterally beyond the original boundaries of the waste site and, in one area, to depths that exceeded the characterization strategy. It is unknown whether the plume reached the water table, located approximately 104 meters below ground surface.

  4. The Institute of Geophysics and Planetary Physics (IGPP) at Los Alamos National Laboratory (LANL) is one of the Los Alamos National Laboratory science institutes; it

    E-Print Network [OSTI]

    The Institute of Geophysics and Planetary Physics (IGPP) at Los Alamos National Laboratory of the University of California's Systemwide Institute of Geophysics and Planetary Physics. Its science mission. We address the problem within four specific disciplines: · Geophysics · Global

  5. Southeast Asia applied geophysics workshop: Geoscientists without borders Lee M. Liberty*, Spencer H. Wood, Emily A. Hinz, and Dylan Mikesell, Boise State University, Fongsaward

    E-Print Network [OSTI]

    Barrash, Warren

    Southeast Asia applied geophysics workshop: Geoscientists without borders Lee M. Liberty*, Spencer of the SEG Foundation Geoscientists Without Borders program, we conducted a geophysics workshop in northern Thailand to train students and professionals in geophysical methods to address environmental

  6. An Integrated Model For The Geothermal Field Of Milos From Geophysical...

    Open Energy Info (EERE)

    considered. The combination of these data with earlier studies on the geology and geophysics of Milos allow the compilation of a possible model of the geothermal reservoir and...

  7. Institute of Geophysics and Planetary Physics 1993 annual report, October 1, 1992--September 30, 1993

    SciTech Connect (OSTI)

    Ryerson, F.J.; Budwine, C.M. [eds.

    1994-06-15

    This report contains brief papers on the research being conducted at the Institute of Geophysics and Planetary Physics in 1993 in Geosciences, High-Pressure sciences, and Astrophysics.

  8. Automata groups 

    E-Print Network [OSTI]

    Muntyan, Yevgen

    2010-01-16

    automata over the alphabet of 2 letters and 2-state automata over the 3-letter alphabet. We continue the classification work started by the research group at Texas A&M University ([BGK+07a, BGK+07b]) and further reduce the number of pairwise nonisomorphic...

  9. Geophysical Journal International Geophys. J. Int. (2013) 193, 603614 doi: 10.1093/gji/ggs120

    E-Print Network [OSTI]

    Demouchy, Sylvie

    2013-01-01

    Geophysical Journal International Geophys. J. Int. (2013) 193, 603­614 doi: 10.1093/gji/ggs120 of the Earth's magnetic field, performed by satel- lite and geophysical observatories, through historical

  10. Geophysical Research Abstracts, Vol. 8, 06396, 2006 SRef-ID: 1607-7962/gra/EGU06-A-06396

    E-Print Network [OSTI]

    Jamieson, Bruce

    Geophysical Research Abstracts, Vol. 8, 06396, 2006 SRef-ID: 1607-7962/gra/EGU06-A-06396 © European) Dept. of Geology and Geophysics, University of Calgary, Alberta, Canada This study investigates

  11. Geophysical Research Abstracts, Vol. 6, 01855, 2004 SRef-ID: 1607-7962/gra/EGU04-A-01855

    E-Print Network [OSTI]

    Demouchy, Sylvie

    Geophysical Research Abstracts, Vol. 6, 01855, 2004 SRef-ID: 1607-7962/gra/EGU04-A-01855 c European (benoit@dstu.univ-montp2.fr), (2) Department of Geology and Geophysics, Texas A&M University, College

  12. Geophysical Research Abstracts, Vol. 8, 05723, 2006 SRef-ID: 1607-7962/gra/EGU06-A-05723

    E-Print Network [OSTI]

    Demouchy, Sylvie

    Geophysical Research Abstracts, Vol. 8, 05723, 2006 SRef-ID: 1607-7962/gra/EGU06-A-05723 © European) Scripps Inst. of Oceanography, UCSD, la Jolla, USA, (3) Dpt of Geology and Geophysics, Univ. of Wyoming

  13. Geophysical Research Abstracts, Vol. 9, 11521, 2007 SRef-ID: 1607-7962/gra/EGU2007-A-11521

    E-Print Network [OSTI]

    Jamieson, Bruce

    Geophysical Research Abstracts, Vol. 9, 11521, 2007 SRef-ID: 1607-7962/gra/EGU2007-A-11521, University of Calgary, Calgary AB, Canada, (3) Department of Geology and Geophysics, University of Calgary

  14. 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 to estimate porosity ( ) and water saturation (Sw) using multiple sources of information, including borehole the stochastic framework, both reservoir parameters and geophysical attributes at unsampled locations

  15. Towards a comprehensive open-source system for geophysical data processing

    E-Print Network [OSTI]

    Patterson, William P.

    used in seismic interpretation. These three components operate in parallel on a distributed computerTowards a comprehensive open-source system for geophysical data processing and interpretation Glenn of a broad range of geophysical data, with emphasis on reflection/refraction seismics. The package also

  16. Reducing the Dimensionality of Geophysical Data in Conjunction with Seismic History Matching

    E-Print Network [OSTI]

    Eidsvik, Jo

    dimensional geophysical data, e.g. 2-D seismic images or 3-D seismic cubes, can often be described using only by geophysical observations and the complexity of working with 3D fields make the updating procedure hard. We are tested on a reservoir model of an anonymous North Sea oil field, using the seismic time shift, i

  17. Allan variance computed in space domain: Application to InSAR data to characterize noise and geophysical signal

    E-Print Network [OSTI]

    Cavalié, Olivier

    2015-01-01

    The Allan variance was introduced fifty years ago for analyzing the stability of frequency standards. Beside its metrological interest, it is also an estimator of the large trends of the power spectral density (PSD) of frequency deviation. For instance, the Allan variance is able to discriminate different types of noise characterized by different power laws in the PSD. But, it was also used in other fields: accelerometry, geophysics, geodesy, astrophysics and even finances! However, it seems that up to now, it has been exclusively applied for time series analysis. We propose here to use the Allan variance onto spatial data. Interferometric synthetic aperture radar (InSAR) is used in geophysics to image ground displacements in space (over the SAR image spatial coverage) and in time thank to the regular SAR image acquisitions by dedicated satellites. The main limitation of the technique is the atmospheric disturbances that affect the radar signal while traveling from the sensor to the ground and back. In this p...

  18. Lattice-Boltzmann Method for Geophysical Plastic Flows

    E-Print Network [OSTI]

    Leonardi, Alessandro; Mendoza, Miller; Herrmann, Hans J

    2015-01-01

    We explore possible applications of the Lattice-Boltzmann Method for the simulation of geophysical flows. This fluid solver, while successful in other fields, is still rarely used for geotechnical applications. We show how the standard method can be modified to represent free-surface realization of mudflows, debris flows, and in general any plastic flow, through the implementation of a Bingham constitutive model. The chapter is completed by an example of a full-scale simulation of a plastic fluid flowing down an inclined channel and depositing on a flat surface. An application is given, where the fluid interacts with a vertical obstacle in the channel.

  19. Atmospheric and Geophysical Sciences Division Program Report, 1988--1989

    SciTech Connect (OSTI)

    Not Available

    1990-06-01

    In 1990, the Atmospheric and Geophysical Sciences Division begins its 17th year as a division. As the Division has grown over the years, its modeling capabilities have expanded to include a broad range of time and space scales ranging from hours to decades and from local to global. Our modeling is now reaching out from its atmospheric focus to treat linkages with the oceans and the land. In this report, we describe the Division's goal and organizational structure. We also provide tables and appendices describing the Division's budget, personnel, models, and publications. 2 figs., 1 tab.

  20. BSU Geophysics Field Camp Report 2012 | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowaWisconsin: EnergyYorkColorado State Office JumpUtahPlc Jump to:Geophysics

  1. This article was downloaded by: [Institute of Geology and Geophysics of CAS] On: 29 November 2011, At: 16:34

    E-Print Network [OSTI]

    Tian, Weidong

    This article was downloaded by: [Institute of Geology and Geophysics of CAS] On: 29 November 2011 a & Dunyi Liu b a Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China b Beijing Fana and Dunyi Liub a Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China

  2. Transition study plans for current G&G students OPTION 1: Majors -Geology, Geophysics and Spatial Information Major

    E-Print Network [OSTI]

    Transition study plans for current G&G students OPTION 1: Majors - Geology, Geophysics and Spatial Approved Level II Remote Sensing III Geology Summer Sch GIS for Environmental Management III Geophysics Semester 1 Tectonics III Igneous & Metamorphic Geology III Geophysics III Exploration Methods III Semester

  3. Dear Susan, On behalf of the entire Near Surface Geophysics Section (NSGS) of the Society of Exploration

    E-Print Network [OSTI]

    Dear Susan, On behalf of the entire Near Surface Geophysics Section (NSGS) of the Society of Exploration Geophysicists (SEG) and Environmental and Engineering Geophysical Society (EEGS), I would like extraordinary leadership in advancing the cause of near surface geophysics through longterm, tireless

  4. GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, A new 1.6-micron map of Titan's surface

    E-Print Network [OSTI]

    Brown, Michael E.

    GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, A new 1.6-micron map of Titan's surface are likely craters. Accepted for publication in Geophysical Research Letters. Copyright 2004 American Geophysical Union. Further re- production or electronic distribution is not permitted. 1. Introduction

  5. Geophysical Research Abstracts, Vol. 9, 06422, 2007 SRef-ID: 1607-7962/gra/EGU2007-A-06422

    E-Print Network [OSTI]

    Brückl, Ewald

    Geophysical Research Abstracts, Vol. 9, 06422, 2007 SRef-ID: 1607-7962/gra/EGU2007-A-06422 © European Geosciences Union 2007 Deep Alpine Valleys - examples of geophysical explorations in Austria E. Brückl (1), J. Brückl (2), W. Chwatal (1), Ch. Ullrich (1,3) (1) Institute of Geodesy and Geophysics

  6. GEOPHYSICS, VOL. 67, NO. 5 (SEPTEMBER-OCTOBER 2002); P. 15321541, 5 FIGS. 10.1190/1.1512749

    E-Print Network [OSTI]

    Utah, University of

    GEOPHYSICS, VOL. 67, NO. 5 (SEPTEMBER-OCTOBER 2002); P. 1532­1541, 5 FIGS. 10.1190/1.1512749 3-D inhomogeneous geological structures is a challenging problem in exploration geophysics. Despite significant of Geology and Geophysics, Salt Lake City, Utah 84112. E-mail: oleg@cs.utah.edu; mzhdanov@mines.utah.edu. c

  7. 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

    studies, reservoir parameters as well as geophysical attributes at unsampled locations were considered relationships between the reservoir parameters and the geophysical attributes were enforced. Those methods and the geophysical attributes. Unlike conventional inversion, our stochastic inversion of seismic P-wave velocity

  8. Geophysics: Building E5190 decommissioning, Aberdeen Proving Ground

    SciTech Connect (OSTI)

    Miller, S.F.; Thompson, M.D.; McGinnis, M.G.; McGinnis, L.D.

    1992-07-01

    Building E5190 is one of ten potentially contaminated sites in the Canal Creek area of the Edgewood section of Aberdeen Proving Ground examined by a geophysical team from Argonne National Laboratory in April and May 1992. A noninvasive geophysical survey, including the complementary technologies of magnetics, electrical resistivity, and ground-penetrating radar, was conducted around the perimeter as a guide to developing a sampling and monitoring program prior to decommissioning and dismantling the building. The magnetics surveys indicated that multistation, positive magnetic sources are randomly distributed north and west of the building. Two linear trends were noted: one that may outline buried utility lines and another that is produced by a steel-covered trench. The resistivity profiling indicated three conductive zones: one due to increased moisture in a ditch, one associated with buried utility lines, and a third zone associated with the steel-covered trench. Ground-penetrating radar imaging detected two significant anomalies, which were correlated with small-amplitude magnetic anomalies. The objectives of the study -- to detect and locate objects and to characterize a located object were achieved.

  9. User's manual for geophysical well-logging software programs

    SciTech Connect (OSTI)

    Petrie, G.M.; Gibson, D.; Blair, S.C.

    1983-02-01

    Since 1958 the Ground-Water Surveillance Program for the Hanford Site has made geophysical logging measurements in most of the 800 wells and deep boreholes that have been drilled on the Hanford Site. In 1980 the Pacific Northwest Laboratory (PNL), which conducts the Ground-Water Surveillance Program, began forming a computerized data base for storing and retrieving geophysical well log data and developing software for quantitative analysis of the well log data. This report, designed to serve as a user's guide, documents the data base system that handles the well log data. Two programs, DIGLOG1 and LOGIT, are used to manipulate the data. The program DIGLOG1 translates analog paper strip charts into digital format; the program LOGIT is a general utility program that edits, displays, checks, stores, writes, and deletes sets of well log data. These two programs do not provide sophisticated display and analytical capabilities; rather, they provide programs that give the user easy access to powerful standard analytical software.

  10. Spatial correlation structure estimation using geophysical and hydrogeological data

    E-Print Network [OSTI]

    Hubbard, Susan

    and sufficient hydraulic property measurements using conventional sampling techniques, render estimation the spatial correlation structure of these properties using these conventional field sampling techniques) hydrological techniques require drilling, and the installed wells change the nature of the flow processes

  11. Inversion of surface and borehole gravity with thresholding and density constraints Jiajia Sun and Yaoguo Li, Center for Gravity, Electrical and Magnetic Studies, Department of Geophysics, Colorado

    E-Print Network [OSTI]

    and Yaoguo Li, Center for Gravity, Electrical and Magnetic Studies, Department of Geophysics, Colorado School

  12. SURFACE GEOPHYSICAL EXPLORATION DEVELOPING NONINVASIVE TOOLS TO MONITOR PAST LEAKS AROUND HANFORD TANK FARMS

    SciTech Connect (OSTI)

    MYERS DA; RUCKER DF; LEVITT MT; CUBBAGE B; NOONAN GE; MCNEILL M; HENDERSON C

    2011-06-17

    A characterization program has been developed at Hanford to image past leaks in and around the underground storage tank facilities. The program is based on electrical resistivity, a geophysical technique that maps the distribution of electrical properties of the subsurface. The method was shown to be immediately successful in open areas devoid of underground metallic infrastructure, due to the large contrast in material properties between the highly saline waste and the dry sandy host environment. The results in these areas, confirmed by a limited number of boreholes, demonstrate a tendency for the lateral extent of the underground waste plume to remain within the approximate footprint of the disposal facility. In infrastructure-rich areas, such as tank farms, the conventional application of electrical resistivity using small point-source surface electrodes initially presented a challenge for the resistivity method. The method was then adapted to directly use the buried infrastructure as electrodes for both transmission of electrical current and measurements of voltage. For example, steel-cased wells that surround the tanks were used as long electrodes, which helped to avoid much of the infrastructure problems. Overcoming the drawbacks of the long electrode method has been the focus of our work over the past seven years. The drawbacks include low vertical resolution and limited lateral coverage. The lateral coverage issue has been improved by supplementing the long electrodes with surface electrodes in areas devoid of infrastructure. The vertical resolution has been increased by developing borehole electrode arrays that can fit within the small-diameter drive casing of a direct push rig. The evolution of the program has led to some exceptional advances in the application of geophysical methods, including logistical deployment of the technology in hazardous areas, development of parallel processing resistivity inversion algorithms, and adapting the processing tools to accommodate electrodes of all shapes and locations. The program is accompanied by a full set of quality assurance procedures that cover the layout of sensors, measurement strategies, and software enhancements while insuring the integrity of stored data. The data have been shown to be useful in identifying previously unknown contaminant sources and defining the footprint of precipitation recharge barriers to retard the movement of existing contamination.

  13. Geophysical methods for fracture characterization in and around potential sites for nuclear waste disposal

    SciTech Connect (OSTI)

    Majer, E.L.; Lee, K.H. ); Morrison, H.F. )

    1992-08-01

    Historically, geophysical methods have been used extensively to successfully explore the subsurface for petroleum, gas, mineral, and geothermal resources. Their application, however, for site characterization, and monitoring the performance of near surface waste sites or repositories has been somewhat limited. Presented here is an overview of the geophysical methods that could contribute to defining the subsurface heterogeneity and extrapolating point measurements at the surface and in boreholes to volumetric descriptions in a fractured rock. In addition to site characterization a significant application of geophysical methods may be in performance assessment and in monitoring the repository to determine if the performance is as expected.

  14. Parameterization of geophysical inversion model using particle clustering

    E-Print Network [OSTI]

    Yang, Dikun

    2015-01-01

    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 ...

  15. Flow networks: A characterization of geophysical fluid transport

    E-Print Network [OSTI]

    Enrico Ser-Giacomi; Vincent Rossi; Cristobal Lopez; Emilio Hernandez-Garcia

    2015-03-05

    We represent transport between different regions of a fluid domain by flow networks, constructed from the discrete representation of the Perron-Frobenius or transfer operator associated to the fluid advection dynamics. The procedure is useful to analyze fluid dynamics in geophysical contexts, as illustrated by the construction of a flow network associated to the surface circulation in the Mediterranean sea. We use network-theory tools to analyze the flow network and gain insights into transport processes. In particular we quantitatively relate dispersion and mixing characteristics, classically quantified by Lyapunov exponents, to the degree of the network nodes. A family of network entropies is defined from the network adjacency matrix, and related to the statistics of stretching in the fluid, in particular to the Lyapunov exponent field. Finally we use a network community detection algorithm, Infomap, to partition the Mediterranean network into coherent regions, i.e. areas internally well mixed, but with little fluid interchange between them.

  16. Geophysical Monitoring of Ground Surface Deformation Associated with a Confined Aquifer Storage and Recovery Operation

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

    Bonneville, Alain; Heggy, Essam; Strickland, Christopher E.; Normand, Jonathan; Dermond, Jeffrey A.; Fang, Yilin; Sullivan, E. C.

    2015-08-11

    A main issue in the storage of large volumes of fluids, mainly water and CO2, in the deep subsurface is to determine their field-scale-induced displacements and consequences on the mechanical behavior of the storage reservoir and surroundings. A quantifiable estimation of displacement can be made by combining the robust, cost-effective, and repeatable geophysical techniques of micro-gravimetry, differential global positioning system (DGPS), and differential synthetic aperture radar interferometry (DInSAR). These techniques were field tested and evaluated in an active large-volume aquifer storage and recovery (ASR) project in Pendleton, Oregon, USA, where three ASR wells are injecting up to 1.9 million m3/yr-1more »into basalt aquifers to a depth of about 150 m. Injection and recovery of water at the wells was accompanied by significant gravity anomalies and vertical deformation of the ground surface localized to the immediate surroundings of the injection wells as evidenced by DGPS and gravity measurements collected in 2011. At a larger scale, and between 2011 and 2013, DInSAR monitoring of the Pendleton area suggests the occurrence of sub-centimetric deformation in the western part of the city and close to the injection locations associated with the ASR cycle. A numerical simulation of the effect of the water injection gives results in good agreement with the observations and confirms the validity of the approach, which could be deployed in similar geological contexts to look at the mechanical effects of water and gas injections. The gravity signal reflects deep phenomena and gives additional insight into the repartition of fluids in the subsurface.« less

  17. Reprint -Proceedings 2009 International Pittsburgh Coal Conference 1 GEOPHYSICAL CHARACTERIZATION OF THE MARSHALL

    E-Print Network [OSTI]

    Wilson, Thomas H.

    Reprint - Proceedings 2009 International Pittsburgh Coal Conference 1 GEOPHYSICAL CHARACTERIZATION, Director National Research Center for Coal and Energy Richard A. Winschel, Director Research Services coal seam in the Northern Appalachian Basin. Researchers from CONSOL Energy Inc., West Virginia

  18. Geology and Geophysics at The University of Kansas Geology's High-Tech Revolution

    E-Print Network [OSTI]

    GHAWKER Geology and Geophysics at The University of Kansas Fall 2009 Geology's High-Tech Revolution Associates Program of the Kansas University Endowment Association. The High-Tech Revolution A geologist

  19. Course: Numerical Simulation in Applied Geophysics. From the Mesoscale to the Macroscale

    E-Print Network [OSTI]

    Santos, Juan

    Course: Numerical Simulation in Applied Geophysics. From the Mesoscale to the Macroscale Professor variations in the fluid and solid matrix properties, fine layering, frac- tures and craks at the mesoscale

  20. The dynamics of oceanic transform faults : constraints from geophysical, geochemical, and geodynamical modeling

    E-Print Network [OSTI]

    Gregg, Patricia Michelle Marie

    2008-01-01

    Segmentation and crustal accretion at oceanic transform fault systems are investigated through a combination of geophysical data analysis and geodynamical and geochemical modeling. Chapter 1 examines the effect of fault ...

  1. Geologic and geophysical investigation of a small water retention structure, Salado, Tx 

    E-Print Network [OSTI]

    Carter, James Lewis

    2002-01-01

    erosion. Although such problems do not pose a significant risk to life or property, they do pose a financial liability to the landowner. For those whose ponds are undergoing such problems, a basic geological and geophysical investigation can help...

  2. Geology and Geophysics 454: Engineering Geology Spring Semester, 2015, 3.0 Units

    E-Print Network [OSTI]

    1 Geology and Geophysics 454: Engineering Geology Spring Semester, 2015: "Engineering Geology" by Perry Rahn, or "Practical Engineering Geology" by Steve Hencher Class Themes This class emphasizes a modern approach to engineering geology

  3. Department of Geology & Geophysics, Spring 2015 GG304: Physics of the Earth and Planets

    E-Print Network [OSTI]

    1 Department of Geology & Geophysics, Spring 2015 GG304: Physics of the Earth and Planets The Earth's shape, orbit, interior structure, and geological evolution are all the result of the interaction

  4. Electrical conductivity of continental lithospheric mantle from integrated geophysical and petrological modeling

    E-Print Network [OSTI]

    Jones, Alan G.

    Electrical conductivity of continental lithospheric mantle from integrated geophysical; published 11 October 2011. [1] The electrical conductivity of mantle minerals is highly sensitive, and compositional variations. The bulk electrical conductivity model has been integrated into the software package

  5. Ng Chung-Sung Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA

    E-Print Network [OSTI]

    Ng, Chung-Sang

    Ng Chung-Sung C. S. Ng Geophysical Institute, University of Alaska Fairbanks, Fairbanks, Alaska in a statistical steady state [Ng and Bhattacharjee, Astrophys. J., 675, 899 (2008)]. Our numerical work has now

  6. Geophysical applications of nuclear resonant spectroscopy Wolfgang Sturhahn and Jennifer M. Jackson*

    E-Print Network [OSTI]

    Jackson, Jennifer M.

    Geophysical applications of nuclear resonant spectroscopy Wolfgang Sturhahn and Jennifer M. Jackson summarize recent developments of nuclear resonant spectroscopy methods like nuclear resonant inelastic x important information on valence, spin state, and magnetic ordering. Both methods use a nuclear resonant

  7. Marine Geophysical Researches 20: 403423, 1998. 1998 Kluwer Academic Publishers. Printed in the Netherlands.

    E-Print Network [OSTI]

    Cattin, Rodolphe

    Marine Geophysical Researches 20: 403­423, 1998. © 1998 Kluwer Academic Publishers. Printed in the Netherlands. 403 A detailed study of the Gagua Ridge: A fracture zone uplifted during a plate reorganisation

  8. Advisory Group On The Application Of Nuclear Techniques To Geothermal

    Open Energy Info (EERE)

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

  9. GROUP STUDY ROOMS GROUP STUDY ROOMS

    E-Print Network [OSTI]

    Young, R. Michael

    STAFF AREA LEVEL 2 LOBBY bookBot GROUP STUDY ROOMS GROUP STUDY ROOMS GROUPSTUDYROOMS RAIN GARDEN LIBRARY TECHNOLOGY AND MEDIA SPACES GROUP STUDY EVENT AND MEETING SPACES STAFF ONLY STAIRS INSTITUTES AND UNIVERSITY CENTERS #12;GROUP STUDY ROOMS MAKER SPACE LEARNING COMMONS LOCKERS LOCKERS LOCKERS TEACHING

  10. Stargate: Energy Management Techniques

    E-Print Network [OSTI]

    Vijay Raghunathan; Mani Srivastava; Trevor Pering; Roy Want

    2004-01-01

    Stargate: Energy Management Techniques Vijay Raghunathan,Platform specific energy management is crucial for longSolution: System level energy management techniques and

  11. Geophysical Prospecting, 2015 doi: 10.1111/1365-2478.12211 Geomechanical property estimation of unconventional reservoirs using

    E-Print Network [OSTI]

    Chen, Jinsong

    Geophysical Prospecting, 2015 doi: 10.1111/1365-2478.12211 Geomechanical property estimation rock property for the geomechanical response of unconventional reservoir fracking) is demonstrated

  12. Spectral estimation on a sphere in geophysics and cosmology

    E-Print Network [OSTI]

    F. A. Dahlen; Frederik J Simons

    2007-05-22

    We address the problem of estimating the spherical-harmonic power spectrum of a statistically isotropic scalar signal from noise-contaminated data on a region of the unit sphere. Three different methods of spectral estimation are considered: (i) the spherical analogue of the one-dimensional (1-D) periodogram, (ii) the maximum likelihood method, and (iii) a spherical analogue of the 1-D multitaper method. The periodogram exhibits strong spectral leakage, especially for small regions of area $A\\ll 4\\pi$, and is generally unsuitable for spherical spectral analysis applications, just as it is in 1-D. The maximum likelihood method is particularly useful in the case of nearly-whole-sphere coverage, $A\\approx 4\\pi$, and has been widely used in cosmology to estimate the spectrum of the cosmic microwave background radiation from spacecraft observations. The spherical multitaper method affords easy control over the fundamental trade-off between spectral resolution and variance, and is easily implemented regardless of the region size, requiring neither non-linear iteration nor large-scale matrix inversion. As a result, the method is ideally suited for most applications in geophysics, geodesy or planetary science, where the objective is to obtain a spatially localized estimate of the spectrum of a signal from noisy data within a pre-selected and typically small region.

  13. Environmental geophysics at Beach Point, Aberdeen Proving Ground, Maryland

    SciTech Connect (OSTI)

    McGinnis, L.D.; Daudt, C.R.; Thompson, M.D.; Miller, S.F.; Mandell, W.A.; Wrobel, J.

    1994-07-01

    Geophysical studies at Beach Point Peninsula, in the Edgewood area of Aberdeen Proving Ground, Maryland, provide diagnostic signatures of the hydrogeologic framework and possible contaminant pathways. These studies permit construction of the most reasonable scenario linking dense, nonaqueous-phase liquid contaminants introduced at the surface with their pathway through the surficial aquifer. Subsurface geology and contaminant presence were identified by drilling, outcrop mapping, and groundwater sampling and analyses. Suspected sources of near-surface contaminants were defined by magnetic and conductivity measurements. Negative conductivity anomalies may be associated with unlined trenches. Positive magnetic and conductivity anomalies outline suspected tanks and pipes. The anomalies of greatest concern are those spatially associated with a concrete slab that formerly supported a mobile clothing impregnating plant. Resistivity and conductivity profiling and depth soundings were used to identify an electrical anomaly extending through the surficial aquifer to the basal pleistocene unconformity, which was mapped by using seismic reflection methods. The anomaly may be representative of a contaminant plume connected to surficial sources. Major activities in the area included liquid rocket fuel tests, rocket fuel fire suppression tests, pyrotechnic material and smoke generator tests, and the use of solvents at a mobile clothing impregnating plant.

  14. Properties of Group Five and Group Seven transactinium elements

    E-Print Network [OSTI]

    Wilk, Philip A.

    2001-01-01

    of Group Five and Group Seven Transactinium Elementsof Group Five and Group Seven Transactinium Elements byof Group Five and Group Seven Transactinium Elements by

  15. AIR INFILTRATION MEASUREMENT TECHNIQUES

    E-Print Network [OSTI]

    Sherman, M.H.

    2013-01-01

    serious study of research problems in infiltration. THEORYInfiltration Measurement Techniques REFERENCES J .B. Dick, "Experimental Studies

  16. TEC Working Group Topic Groups Tribal

    Broader source: Energy.gov [DOE]

    The Tribal Topic Group was established in January 1998 to address government-to-government consultation between DOE and Indian Tribes affected by its transportation activities. The group focuses on...

  17. Seismic attribute analysis of the Upper Morrow Sandstone and the Arbuckle Group from 3D-3C seismic data at Cutter Field, southwest Kansas

    E-Print Network [OSTI]

    Redger, Clyde Austin

    2015-05-31

    these reservoirs with seismic methods is challenging for a number of geophysical reasons. This study investigates the accuracy with which analysis of post-stack 3D-3C seismic data can delineate Upper Morrow Sandstone reservoirs and predict Arbuckle Group rock...

  18. Silent Study Group Study

    E-Print Network [OSTI]

    Thompson, Michael

    36/72 36/7236/72 36/72 36/72 Silent Study Room 108C Group Study Room 108J Office Room 108A Office Room 108B Staff Room Room 108K Group Study Room 108I Group Study Room 108H Group Study Room 108G Group Study Room 108F Group Study Room 108E Group Study Room 108D Service Area Research Help / Circulation

  19. Integration & Co-development of a Geophysical CO2 Monitoring Suite

    SciTech Connect (OSTI)

    Friedmann, S J

    2007-07-24

    Carbon capture and sequestration (CCS) has emerged as a key technology for dramatic short-term reduction in greenhouse gas emissions in particular from large stationary. A key challenge in this arena is the monitoring and verification (M&V) of CO2 plumes in the deep subsurface. Towards that end, we have developed a tool that can simultaneously invert multiple sub-surface data sets to constrain the location, geometry, and saturation of subsurface CO2 plumes. We have focused on a suite of unconventional geophysical approaches that measure changes in electrical properties (electrical resistance tomography, electromagnetic induction tomography) and bulk crustal deformation (til-meters). We had also used constraints of the geology as rendered in a shared earth model (ShEM) and of the injection (e.g., total injected CO{sub 2}). We describe a stochastic inversion method for mapping subsurface regions where CO{sub 2} saturation is changing. The technique combines prior information with measurements of injected CO{sub 2} volume, reservoir deformation and electrical resistivity. Bayesian inference and a Metropolis simulation algorithm form the basis for this approach. The method can (a) jointly reconstruct disparate data types such as surface or subsurface tilt, electrical resistivity, and injected CO{sub 2} volume measurements, (b) provide quantitative measures of the result uncertainty, (c) identify competing models when the available data are insufficient to definitively identify a single optimal model and (d) rank the alternative models based on how well they fit available data. We present results from general simulations of a hypothetical case derived from a real site. We also apply the technique to a field in Wyoming, where measurements collected during CO{sub 2} injection for enhanced oil recovery serve to illustrate the method's performance. The stochastic inversions provide estimates of the most probable location, shape, volume of the plume and most likely CO{sub 2} saturation. The results suggest that the method can reconstruct data with poor signal to noise ratio and use hard constraints available from many sites and applications. External interest in the approach and method is high, and already commercial and DOE entities have requested technical work using the newly developed methodology for CO{sub 2} monitoring.

  20. Analysis of snow in the 20th and 21st century Geophysical Fluid Dynamics Laboratory coupled climate model simulations

    E-Print Network [OSTI]

    Dery, Stephen

    Analysis of snow in the 20th and 21st century Geophysical Fluid Dynamics Laboratory coupled climate Northern Hemisphere, North American, and Eurasian snow cover extent, frequency, and mass by the Geophysical cycle in Northern Hemisphere snow cover extent and produce a mean annual snow area of 25 Â 106 km2

  1. Mechanical action and Geophysical reaction: Equipment Oil sand Interactions (Originally presented at CAMI, September 8 10, 2003, Calgary, Alberta)

    E-Print Network [OSTI]

    Joseph, Tim Grain

    at CAMI, September 8 ­ 10, 2003, Calgary, Alberta) Tim Grain Joseph, Ph.D., P.Eng., Asst. Professor, Mining, University of Alberta & Principal Engineer, JPi Ltd. and Marek Welz, B.Sc., Geophysical Field Manager & Graduate Student, Geophysics, University of Alberta. ABSTRACT Joseph (2002) and Joseph

  2. Collaborative Research: hydrogeological-geophysical methods for subsurface site characterization. 1998 annual progress report

    SciTech Connect (OSTI)

    Mavko, G. [Stanford Univ., CA (US); Rubin, Y.N. [Univ. of California, Berkeley, CA (US)

    1998-06-01

    'The general purpose is the subsurface characterization of LLNL superfund site. The goal is to get the most accurate map of the hydrogeological parameters, necessary for modeling and designing the cleanup efforts at the site, using well log data and remote sensing geophysical techniques. In the second year of the project progress has been made in several areas: gathering and interpreting Vertical Seismic Profile (VSP) and Electromagnetic (EM) surveys; investigating the impact of various seismic measurements on upscaling of rock physics relations between sediment properties; and developing a new approach to integrate geophysical and hydrological data using state of the art methods to characterize the subsurface lithology. Vertical Seismic Profile data has been gathered from selected wells at the Treatment Facility D (TFD) during April 1996 and April 1998. The most striking finding here is the detection of anomalies related to saturation conditions. Preliminary results have revealed three anomalously low acoustic velocity zones with velocities below 1,000 m/s; this is lower than the natural acoustic velocity in saturated media by pure water (1,500 m/s). These three zones appear to be associated with HSUs 3a, 3b and 5. Velocities below 600 m/s have been revealed in the 3a and 3b HSUs (http://www.ce.Berkeley.edu/{approximately}ezzedine/DOE/paul.html). The authors believe that these anomalies are indicative of partial saturation. This explanation is supported by the water samples taken from pumping stations near the VSP well sites which appears to contain air bubbles. A gas analysis of water samples has not yet been performed. The authors hypothesize that this gas can be either air being sucked-in from the vadose zone above the water table, or from some chemical reaction. As a matter of fact, the natural water table level at this site was around 20 m below ground surface before any large scale pumping began, and had dropped to 25.5 m, in April 98. Furthermore, some of these low velocity zones are occurring not only in the major free-flowing sand or gravel parts of the HSU, but in boundary layers of silty sand either above or below the main HSU conductor. An electromagnetic survey was conducted at the site during June 4--25, 1997, and they worked on its interpretation. Seven cross well EM data sets were collected. Both 1D and 2D simulations, approximating the actual site and survey setup, were conducted. The 1D simulations were conducted using the code EM1D for one data set. Newman and Alumbaugh''s 3D forward code was used to simulate the response of both a resistive layer (representing HSU 4) and a conductive layer at the same location. Three separate inversion algorithms were applied to the data: Newman and Alumbaugh''s 2.5D finite difference and integral solution algorithm, Alumbaugh''s iterative Born approximation with a cylindrical symmetry, and Tseng''s 3D extended born approximation. The field EM data are still being analyzed.'

  3. Status of data, major results, and plans for geophysical activities, Yucca Mountain Project

    SciTech Connect (OSTI)

    Oliver, H.W. [Geological Survey, Menlo Park, CA (USA); Hardin, E.L. [Science Applications International Corp., Las Vegas, NV (USA); Nelson, P.H. [Geological Survey, Denver, CO (USA)] [eds.

    1990-07-01

    This report describes past and planned geophysical activities associated with the Yucca Mountain Project and is intended to serve as a starting point for integration of geophysical activities. This report relates past results to site characterization plans, as presented in the Yucca Mountain Site Characterization Plan (SCP). This report discusses seismic exploration, potential field methods, geoelectrical methods, teleseismic data collection and velocity structural modeling, and remote sensing. This report discusses surface-based, airborne, borehole, surface-to-borehole, crosshole, and Exploratory Shaft Facility-related activities. The data described in this paper, and the publications discussed, have been selected based on several considerations; location with respect to Yucca Mountain, whether the success or failure of geophysical data is important to future activities, elucidation of features of interest, and judgment as to the likelihood that the method will produce information that is important for site characterization. 65 refs., 19 figs., 12 tabs.

  4. Matrix Groups Max Neunhffer

    E-Print Network [OSTI]

    St Andrews, University of

    Matrix Groups Max Neunhöffer Introduction GAP examples Matrix groups in GAP Schreier-Sims Problems Group algebras SLPs Constructive recognition The problem Troubles Matrix Groups Max Neunhöffer University of St Andrews GAC 2010, Allahabad #12;Matrix Groups Max Neunhöffer Introduction GAP examples

  5. GROUP THERAPY Syracuse University

    E-Print Network [OSTI]

    McConnell, Terry

    your individual needs. In a group, up to eight students meet with one or two group therapists. MostGROUP THERAPY Syracuse University Counseling Center 200 Walnut Place Phone: 315-443-4715 Fax: 315-443-4276 counselingcenter.syr.edu WHAT STUDENTS SAY ABOUT GROUP THERAPY I was really anxious about joining a group

  6. Archaeological investigations using geophysics at Chimney Rock Great House, Colorado Michael A. Mitchell, Sarah G.R. Devriese, Roxanna N. Frary, Richard A. Krahenbuhl, Brenda K. Todd,

    E-Print Network [OSTI]

    Archaeological investigations using geophysics at Chimney Rock Great House, Colorado Michael A of Geophysics, Colorado School of Mines Department of Anthropology, University of Colorado, Boulder SUMMARY In this talk, we present results from a geophysical investiga- tion at the Chimney Rock Great House using

  7. The Institute of Geophysics, Planetary Physics and Signatures (IGPPS) at Los Alamos National Laboratory (LANL) is one of the Los Alamos National Laboratory science

    E-Print Network [OSTI]

    The Institute of Geophysics, Planetary Physics and Signatures (IGPPS) at Los Alamos National: · Geophysics · Global Climate · Space Science · Astrophysics and Cosmology FY15 CALL FOR RESEARCH PROPOSALS and quality of life in our increasingly technological society. 3. Solid earth geoscience (geophysics

  8. CorrelationF unctions of Random Media Summary ---In geophysics, the correlation functions of random media are of principal importance for

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    CorrelationF unctions of Random Media LUDE Ÿ K KLIMES Ÿ 1 Summary --- In geophysics, in a simple general form enabling the random media used in geophysics to be specified. The medium correlation.g., SHAPIRO and KNEIB, 1993; SHAPIRO et al., 1996; MU Ë? LLER and SHAPIRO, 2001). 1 Department of Geophysics

  9. Student-based archaeological geophysics in northern Thailand Emily A. Hinz*, Lee M. Liberty, and Spencer H. Wood, Boise State University, Fongsaward Singharajawarapan

    E-Print Network [OSTI]

    Barrash, Warren

    Student-based archaeological geophysics in northern Thailand Emily A. Hinz*, Lee M. Liberty of Western Australia Summary As part of the 2010 near-surface geophysics workshop in Chiang Mai, Thailand, local archaeological targets were used as a basis for teaching geophysical data collection, processing

  10. GEOPHYSICS, VOL. 54, NO. 9 (SEPTEMBER 1989): P. 1153-I 163, 14 FIGS.. 4 TABLES. Stability of wide-angle absorbing boundary conditions

    E-Print Network [OSTI]

    Renaut, Rosemary

    GEOPHYSICS, VOL. 54, NO. 9 (SEPTEMBER 1989): P. 1153-I 163, 14 FIGS.. 4 TABLES. Stability of wide and numerically. Our numerical results confirm that INTRODUCTION Many geophysical problems, including modeling-1804. *Bergen Scientific Centre, IBM, N5006 Bergen, Norway. 0 1989 Society of Exploration Geophysic

  11. Department of Geology and Geophysics-Frederick A. Sutton Building 115 South 1460 East, Room 383, Salt Lake City, Utah 84112-0102

    E-Print Network [OSTI]

    Johnson, Cari

    Department of Geology and Geophysics- Frederick A. Sutton Building to The University of Utah Department of Geology and Geophysics Donor's Information, to the Department of Geology and Geophysics of the University of Utah as an unrestricted gift. Fill out and sign

  12. Institute of Geophysics and Planetary Physics, Lawrence Livermore National Laboratory, 1996 Annual Report

    SciTech Connect (OSTI)

    Ryerson, F. J., Institute of Geophysics and Planetary Physics

    1998-03-23

    The Institute of Geophysics and Planetary Physics (IGPP) is a Multicampus Research Unit of the University of California (UC). IGPP was founded in 1946 at UC Los Angeles with a charter to further research in the earth and planetary sciences and in related fields. The Institute now has branches at UC campuses in Los Angeles, San Diego, and Riverside, and at Los Alamos and Lawrence Livermore national laboratories. The University-wide IGPP has played an important role in establishing interdisciplinary research in the earth and planetary sciences. For example, IGPP was instrumental in founding the fields of physical oceanography and space physics, which at the time fell between the cracks of established university departments. Because of its multicampus orientation, IGPP has sponsored important interinstitutional consortia in the earth and planetary sciences. Each of the five branches has a somewhat different intellectual emphasis as a result of the interplay between strengths of campus departments and Laboratory programs. The IGPP branch at Lawrence Livermore National Laboratory (LLNL) was approved by the Regents of the University of California in 1982. IGPP-LLNL emphasizes research in seismology, geochemistry, cosmochemistry, and astrophysics. It provides a venue for studying the fundamental aspects of these fields, thereby complementing LLNL programs that pursue applications of these disciplines in national security and energy research. IGPP-LLNL is directed by Charles Alcock and was originally organized into three centers: Geosciences, stressing seismology; High-Pressure Physics, stressing experiments using the two-stage light-gas gun at LLNL; and Astrophysics, stressing theoretical and computational astrophysics. In 1994, the activities of the Center for High-Pressure Physics were merged with those of the Center for Geosciences. The Center for Geosciences, headed by Frederick Ryerson, focuses on research in geophysics and geochemistry. The Astrophysics Research Center, headed by Charles Alcock, provides a home for theoretical and observational astrophysics and serves as an interface with the Physics and Space Technology Department's Laboratory for Experimental Astrophysics and with other astrophysics efforts at LLNL. The IGPP branch at LLNL (as well as the branch at Los Alamos) also facilitates scientific collaborations between researchers at the UC campuses and those at the national laboratories in areas related to earth science, planetary science, and astrophysics. It does this by sponsoring the University Collaborative Research Program (UCRP), which provides funds to UC campus scientists for joint research projects with LLNL. The goals of the UCRP are to enrich research opportunities for UC campus scientists by making available to them some of LLNL's unique facilities and expertise, and to broaden the scientific program at LLNL through collaborative or interdisciplinary work with UC campus researchers. UCRP funds (provided jointly by the Regents of the University of California and by the Director of LLNL) are awarded annually on the basis of brief proposals, which are reviewed by a committee of scientists from UC campuses, LLNL programs, and external universities and research organizations. Typical annual funding for a collaborative research project ranges from $5,000 to $25,000. Funds are used for a variety of purposes, including salary support for visiting graduate students, postdoctoral fellows, and faculty; released-time salaries for LLNL scientists; and costs for experimental facilities. Although the permanent LLNL staff assigned to IGPP is relatively small (presently about five full-time equivalents), IGPP's research centers have become vital research organizations. This growth has been possible because of IGPP support for a substantial group of resident postdoctoral fellows; because of the 20 or more UCRP projects funded each year; and because IGPP hosts a variety of visitors, guests, and faculty members (from both UC and other institutions) on sabbatical leave. To focus attention on areas of topical interest i

  13. Assessor Training Assessment Techniques

    E-Print Network [OSTI]

    NVLAP Assessor Training Assessment Techniques: Communication Skills and Conducting an Assessment listener ·Knowledgeable Assessor Training 2009: Assessment Techniques: Communication Skills & Conducting, truthful, sincere, discrete · Diplomatic · Decisive · Selfreliant Assessor Training 2009: Assessment

  14. GRAYSTONE GROUP ADVERTISING

    E-Print Network [OSTI]

    Wu, Shin-Tson

    and GRAYSTONE GROUP ADVERTISING Partnership The University Central Florida has partnered with the Graystone Group for the purposes of facilitating recruitment advertising services. Benefits of partnering evaluations. Placing Recruitment Advertising: · Graystone Group is available to support all your recruitment

  15. TEC Working Group Topic Groups Archives Communications

    Broader source: Energy.gov [DOE]

    The Communications Topic Group was convened in April 1998 to improve internal and external strategic level communications regarding DOE shipments of radioactive and other hazardous materials.

  16. Microsystems and Nanotechnology Group

    E-Print Network [OSTI]

    Pulfrey, David L.

    and energy storage. #12;Microsystems and Nanotechnology Group Microsystems and Nanotechnology Group 2, catalytic chemical vapor deposition of carbon nanotubes, nanowire (silicon, germanium) growth, nanocom

  17. Specific Group Hardware

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

    Specific Group Hardware Specific Group Hardware ALICE palicevo1 The Virtual Organization (VO) server. Serves as gatekeeper for ALICE jobs. It's duties include getting assignments...

  18. The lunar Askaryan technique: a technical roadmap

    E-Print Network [OSTI]

    Bray, J D; Buitink, S; Dagkesamanskii, R D; Ekers, R D; Falcke, H; Gayley, K G; Huege, T; James, C W; Mevius, M; Mutel, R L; Protheroe, R J; Scholten, O; Spencer, R E; ter Veen, S

    2015-01-01

    The lunar Askaryan technique, which involves searching for Askaryan radio pulses from particle cascades in the outer layers of the Moon, is a method for using the lunar surface as an extremely large detector of ultra-high-energy particles. The high time resolution required to detect these pulses, which have a duration of around a nanosecond, puts this technique in a regime quite different from other forms of radio astronomy, with a unique set of associated technical challenges which have been addressed in a series of experiments by various groups. Implementing the methods and techniques developed by these groups for detecting lunar Askaryan pulses will be important for a future experiment with the Square Kilometre Array (SKA), which is expected to have sufficient sensitivity to allow the first positive detection using this technique. Key issues include correction for ionospheric dispersion, beamforming, efficient triggering, and the exclusion of spurious events from radio-frequency interference. We review the...

  19. TEC Working Group Topic Groups Archives Protocols

    Broader source: Energy.gov [DOE]

    The Transportation Protocols Topic Group serves as an important vehicle for DOE senior managers to assess and incorporate stakeholder input into the protocols process. The Topic Group was formed to review a series of transportation protocols developed in response to a request for DOE to be more consistent in its approach to transportation.

  20. Group Foliation of Equations in Geophysical Fluid Jeffrey J. Early1, Juha Pohjanpelto2, and Roger M. Samelson1

    E-Print Network [OSTI]

    Kurapov, Alexander

    instead turned to numerical solution methods. The rapid growth of computing power in the last few decades has made numerical methods more compelling, but perhaps more importantly, the computational tools now University Corvallis, OR 97331-5503 USA 2Department of Mathematics Oregon State University Corvallis

  1. Charles A. Stock Research Oceanographer, NOAA/Geophysical Fluid Dynamics Laboratory

    E-Print Network [OSTI]

    Berkeley and Princeton University 2005 Postdoctoral Investigator, Woods Hole Oceanographic Institution 1998-1999 2013-present Member of Research Council at the Geophysical Fluid Dynamics Laboratory 2013 Steering of the Northeast Shelf Large Marine Ecosystem: Key Research Needs and Future Directions", July 2013, Providence RI

  2. Gaussian packet prestack depth migration Department of Geophysics, Faculty of Mathematics and Physics, Charles University,

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Gaussian packet prestack depth migration Karel #20; Z#19;a#20;cek Department of Geophysics, Faculty depth migration. The main advantage of our method over the methods based on Gaussian beams is a direct. Thus, the Gaussian packet prestack depth migration is especially suitable for a target-oriented imaging

  3. Adaptive Focusing Through Layered Media Using the Geophysical "Time Migration" Concept

    E-Print Network [OSTI]

    Illinois at Urbana-Champaign, University of

    Adaptive Focusing Through Layered Media Using the Geophysical "Time Migration" Concept Mark A. Haun migration. This tech- nique is motivated by considering complete, bistatic, pulse- echo data acquired from layered media, where sound speed is a function of depth only. Reflection travel times as a func- tion

  4. Gaussian packet pre--stack depth migration the Marmousi data Karel Zacek*, Department Geophysics, Faculty

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Gaussian packet pre--stack depth migration the Marmousi data Karel Zacek*, Department Geophysics--stack depth migration. method on Marmousi data (Versteeg & 1991). advantage over methods Gaussian beams. Thus, Gaussian packet pre--stack depth migration is especially suitable target--oriented imaging

  5. Carbon Sequestration and Its Role in the Global Carbon Cycle Geophysical Monograph Series 183

    E-Print Network [OSTI]

    Pennycook, Steve

    73 Carbon Sequestration and Its Role in the Global Carbon Cycle Geophysical Monograph Series 183. Blaine Metting2 The purpose of this chapter is to review terrestrial biological carbon sequestration Northwest National Laboratory, Richland, Washington, USA. #12;74 TERRESTRIAL BIOLOGICAL CARBON SEqUESTRATION

  6. Discrimination and Identification of UXO by Geophysical Inversion. Phase II: Inversion of Total-Field Magnetics

    E-Print Network [OSTI]

    Oldenburg, Douglas W.

    Discrimination and Identification of UXO by Geophysical Inversion. Phase II: Inversion of Total to the discrimination and identification of unexploded ordnance using total-field magnetometry. A black in a predefined library. The discrimination method had the potential to reduce the number of excavations

  7. Department of Geology and Geophysics, University of Utah Spring 2002 down to earth

    E-Print Network [OSTI]

    Johnson, Cari

    1 Department of Geology and Geophysics, University of Utah Spring 2002 down to earth Message From of Bill Parry and Duke Picard resulted in openings in both Geological Engineer- ing and Sedimentary Geology. Our search for their replacements has been successful and we are once again at full strength

  8. Geology and Geophysics 303: Structural Geology Fall Semester, 2015, 3.0 Units

    E-Print Network [OSTI]

    Geology and Geophysics 303: Structural Geology Fall Semester, 2015, 3.0 Units Lectures: MW 10 Geology: An Introduction, by Pollard and Martel (PM) Basic Methods of Structural Geology, by Marshak geologic structures depends largely on how we perceive them. Few geologic structures form by trivially

  9. Tuesday, March 24, 2009 POSTER SESSION I: ICY SATELLITES: GELID GEOLOGY/GEOPHYSICS

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Tuesday, March 24, 2009 POSTER SESSION I: ICY SATELLITES: GELID GEOLOGY/GEOPHYSICS 6:30 p.m. Town of recent tectonic activity on Europa logically starts with the geologically young, ridgeless surface Lunar and Planetary Science Conference (2009) full331.pdf #12;El Maarry M. R. Sierks H. Geological

  10. Tuesday, March 24, 2009 POSTER SESSION I: VENUS GEOLOGY, GEOPHYSICS, MAPPING, AND SAMPLING

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Tuesday, March 24, 2009 POSTER SESSION I: VENUS GEOLOGY, GEOPHYSICS, MAPPING, AND SAMPLING 6:30 p significantly during the observable portion of the geologic history from the catastrophic resurfacing to the equilibrium resurfacing. Ivanov M. A. Head J. W. Geological Mapping of the Fortuna Tessera Quadrangle (V-2

  11. Electrical properties of saline ices and ice-silicate mixtures: geophysical and astrobiological consequences (Invited)

    E-Print Network [OSTI]

    Stillman, David E.

    MR22A-05 Electrical properties of saline ices and ice-silicate mixtures: geophysical) electrical-properties measurements of laboratory- produced saline ice, salt hydrates, and ice of interior properties, and habitability. The electrical properties of saline H2O are controlled by the binary

  12. From: Advances in Geophysics, 46, 81-197. 1 SEISMIC TRAVELTIME TOMOGRAPHY OF THE

    E-Print Network [OSTI]

    Rawlinson, Nick

    to describe a similar process using seismic waves to map earth structure. Seismologists now routinely useFrom: Advances in Geophysics, 46, 81-197. 1 SEISMIC TRAVELTIME TOMOGRAPHY OF THE CRUST, Canberra ACT 0200, Australia 1 Introduction 1.1 Motivation Seismic data represent one of the most valuable

  13. Reactive facies: An approach for parameterizing field-scale reactive transport models using geophysical methods

    E-Print Network [OSTI]

    Chen, Jinsong

    as pumping, slug and flowmeter tests) are commonly used to measure hydraulic conductivity in the vicinity is based on the hypothesis that subsurface units exist that have unique distributions of properties, hydraulic conductivity, and geophysical attributes. We use these correlations within a Bayesian framework

  14. Geophysically consistent values of the perovskite to post-perovskite transition Clapeyron slope

    E-Print Network [OSTI]

    Geophysically consistent values of the perovskite to post-perovskite transition Clapeyron slope J February 2007; published 15 March 2007. [1] The double-crossing hypothesis posits that post- perovskite in Earth's deep mantle and the temperature of Earth's inner core boundary, we show that a post-perovskite

  15. GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, Hygroscopic Properties of Volcanic Ash

    E-Print Network [OSTI]

    Nenes, Athanasios

    GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, Hygroscopic Properties of Volcanic Ash observational data exists on the physical interac- tions between volcanic ash particles and water vapor; yet it is thought that these interactions can strongly impact the microphysical evolution of ash, with implications

  16. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Interferometric electromagnetic Green's functions

    E-Print Network [OSTI]

    JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Interferometric electromagnetic of a direct pulse-echo ex- periment in a three-dimensional configuration. The con- dition-dimensional media. Wave propagation invariants have been used in acoustic, elastic and electromagnetic wave

  17. GEOPHYSICS, VOL. 64, NO. 5 (SEPTEMBER-OCTOBER 1999); P. 13471348 Computers and creativity

    E-Print Network [OSTI]

    Snieder, Roel

    GEOPHYSICS, VOL. 64, NO. 5 (SEPTEMBER-OCTOBER 1999); P. 1347­1348 Computers and creativity John A. Scales and Roel Snieder "The real danger is not that computers will begin to think like men, but that men will begin to think like computers."--Sydney J. Harris "Technical skill is mastery of complexity while

  18. USING GEOPHYSICAL METHODS TO IMAGE THE INTERNAL STRUCTURE OF MINE WASTE ROCK PILES

    E-Print Network [OSTI]

    Aubertin, Michel

    (GPR) geophysical methods have been used to study mine dumps. METHODS Resistivity measurements, at the same time as an infiltration test was carried out in order to map fluid flow within the mine dump out in July 2002, and in October 2002 before and after the infiltration test. Figure 3 shows a GPR

  19. 1340 The Leading Edge October 2008 SAGE celebrates 25 years of learning geophysics by

    E-Print Network [OSTI]

    geophysics The increasing world demand and record-high costs for energy and mineral resources, along with the attendant environmental and climate concerns, have escalated the need for trained geophysicists then are closely guided by faculty, teaching assistants, and in- dustry visitors to analyze and interpret

  20. Augmented Geophysical Data Interpretation Through Automated Velocity Picking in Semblance Velocity Images

    E-Print Network [OSTI]

    Whitley, Darrell

    Augmented Geophysical Data Interpretation Through Automated Velocity Picking in Semblance Velocity on the surface. Currently, geophysicists spend hours, days or weeks in front of monitors tracing curves on images of these cor- respond to the bright spots selected by the geophysicist. Next, a combinatorial optimization

  1. College of Natural Science and Mathematics Department of Geology and Geophysics

    E-Print Network [OSTI]

    Hartman, Chris

    gEology College of Natural Science and Mathematics Department of Geology and Geophysics 907-474-7565 www.uaf.edu/geology/ MS, phD Degrees Minimum Requirements for Degrees: MS: 30 credits; PhD: 18 thesis credits Graduates in geology have broad backgrounds in the earth sciences and firm foundations

  2. College of Natural Science and Mathematics Department of Geology and Geophysics

    E-Print Network [OSTI]

    Hartman, Chris

    geoscience College of Natural Science and Mathematics Department of Geology and Geophysics 907-474-7565 www.uaf.edu/geology/ Bs Degree Minimum Requirements for Degree: 120 credits Graduates in geoscience. Four con- centrations are available to allow students to pursue their own emphasis: geology

  3. Major results of geophysical investigations at Yucca Mountain and vicinity, southern Nevada

    SciTech Connect (OSTI)

    Oliver, H.W.; Ponce, D.A. [eds.] [Geological Survey, Menlo Park, CA (United States); Hunter, W.C. [ed.] [Geological Survey, Denver, CO (United States). Yucca Mountain Project Branch

    1995-12-31

    In the consideration of Yucca Mountain as a possible site for storing high level nuclear waste, a number of geologic concerns have been suggested for study by the National Academy of Sciences which include: (1) natural geologic and geochemical barriers, (2) possible future fluctuations in the water table that might flood a mined underground repository, (3) tectonic stability, and (4) considerations of shaking such as might be caused by nearby earthquakes or possible volcanic eruptions. This volume represents the third part of an overall plan of geophysical investigation of Yucca Mountain, preceded by the Site Characterization Plan (SCP; dated 1988) and the report referred to as the Geophysical White Paper, Phase 1, entitled Status of Data, Major Results, and Plans for Geophysical Activities, Yucca Mountain Project (Oliver and others, 1990). The SCP necessarily contained uncertainty about applicability and accuracy of methods then untried in the Yucca Mountain volcano-tectonic setting, and the White Paper, Phase 1, focused on summarization of survey coverage, data quality, and applicability of results. For the most part, it did not present data or interpretation. The important distinction of the current volume lies in presentation of data, results, and interpretations of selected geophysical methods used in characterization activities at Yucca Mountain. Chapters are included on the following: gravity investigations; magnetic investigations; regional magnetotelluric investigations; seismic refraction investigations; seismic reflection investigations; teleseismic investigations; regional thermal setting; stress measurements; and integration of methods and conclusions. 8 refs., 60 figs., 2 tabs.

  4. Geophysical Prospecting 37,753-770, 1989 SUGGESTIONS FOR A CONSISTENT

    E-Print Network [OSTI]

    Edinburgh, University of

    Geophysical Prospecting 37,753-770, 1989 SUGGESTIONS FOR A CONSISTENT TERMINOLOGY FOR SEISMIC for seismic anisotropy. Geophys- ical Prospecting 37,753-770. Seismic anisotropy is an unfamiliar concept reporting seismic anisotropy more readily comprehensible to the non- specialist. This not a manual

  5. Geophysical Research Abstracts Vol. 14, EGU2012-11103, 2012

    E-Print Network [OSTI]

    Sóbester, András

    - spheric balloon system. The `vehicle' for the latter was built on a 3D printer using a copolymer techniques, coupled with computer-controlled additive manufacturing (3D printing) and laser cutting methods to approximate space-filling curves that maximize sampling efficiency (a 3D `travelling salesman'-type calculus

  6. GGHAWKERHAWKER Geology and Geophysics at The University of Kansas

    E-Print Network [OSTI]

    in the geosciences. There are large numbers of excellent G-Hawks out there in the oil and gas industry, environmental to be more and more widely spread across campus at the same time that our offices and labs are compressed in the practical exploitation of oil shales, and employs unique techniques to understanding microbial and algal

  7. FTN4 OPTIMIZATION TECHNIQUES.

    E-Print Network [OSTI]

    Authors, Various

    2012-01-01

    3 1st Edition FTN4 OPTIMIZATION TECHNIQUES November 1979O. INTRODUCTION 1. COt1PILER OPTIMIZATIONS 2. SOURCE CODEcode. Most of these optimizations decrease central processor

  8. TEC Working Group Topic Groups Manual Review

    Broader source: Energy.gov [DOE]

    This group is responsible for the update of DOE Manual 460.2-1, Radioactive Material Transportation Practices Manual.  This manual was issued on September 23, 2002, and establishes a set of...

  9. TEC Working Group Topic Groups Archives Consolidated Grant Topic Group

    Broader source: Energy.gov [DOE]

    The Consolidated Grant Topic Group arose from recommendations provided by the TEC and other external parties to the DOE Senior Executive Transportation Forum in July 1998. It was proposed that the consolidation of multiple funding streams from numerous DOE sources into a single grant would provide a more equitable and efficient means of assistance to States and Tribes affected by DOE nuclear material shipments.

  10. Environmental geophysics of the Pilot Plant on the west branch of Canal Creek, Aberdeen Proving Ground, Maryland

    SciTech Connect (OSTI)

    McGinnis, L.D.; Miller, S.F.; Daudt, C.R.; Thompson, M.D.; Borden, H.; Benson, M.; Wrobel, J.

    1994-05-01

    Plans to demolish and remediate the Pilot Plant complex in the Edgewood Area of Aberdeen Proving Ground have served to initiate a series of nonintrusive, environmental-geophysical studies. The studies are assisting in the location and identification of pipes, tanks, trenches, and liquid waste in the subsurface. Multiple databases have been integrated to provide support for detection of underground utilities and to determine the stratigraphy and lithology of the subsurface. The studies were conducted within the double security fence and exterior to the double fence, down gradient toward the west branch of Canal Creek. To determine if contaminants found in the creek were associated with the Pilot Plant, both the east and west banks were included in the study area. Magnetic, conductivity, inductive emf, and ground-penetrating-radar anomalies outline buried pipes, trenches, and various pieces of hardware associated with building activities. Ground-penetrating-radar imagery also defines a paleovalley cut 30 ft into Potomac Group sediments of Cretaceous age. The paleovalley crosses the site between Building E5654 and the Pilot Plant fence. The valley is environmentally significant because it may control the pathways of contaminants. The Pilot Plant complex was used to manufacture CC2 Impregnite and incapacitating agents; it also served as a production facility for nerve agents.

  11. Contamination Control Techniques

    SciTech Connect (OSTI)

    EBY, J.L.

    2000-05-16

    Welcome to a workshop on contamination Control techniques. This work shop is designed for about two hours. Attendee participation is encouraged during the workshop. We will address different topics within contamination control techniques; present processes, products and equipment used here at Hanford and then open the floor to you, the attendees for your input on the topics.

  12. Postdoc Research Fellow, Dept. of the Geophysical Sciences,

    E-Print Network [OSTI]

    . Supervisor: Yongyun Hu 2009-11, University of Toronto, Ontario, Canada, in W. R. Peltier's group 3. Postdoc. Richard Peltier, Jun Yang, and G. Vettoretti, 2013: The Initiation of Neoproterozoic ``Snowball'' Climates. Yang, Jun, W. Richard Peltier, and Yongyun Hu, 2012: Initiation of modern soft and hard Snowball Earth

  13. Tritium Focus Group- INEL

    Broader source: Energy.gov [DOE]

    Presentation from the 34th Tritium Focus Group Meeting held in Idaho Falls, Idaho on September 23-25, 2014.

  14. RESEARCH GROUP MANUFACTURING

    E-Print Network [OSTI]

    Psarrakos, Panayiotis

    RESEARCH GROUP MANUFACTURING ADDITIVE www.lboro.ac.uk/amrg PhD Studentships in Additive by the Additive Manufacturing Research Group is based around a family of processes comprising of adding layers Additive Manufacturing Research Group in the Wolfson School of Mechanical & Manufacturing Engineering

  15. 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

  16. GEOPHYSICS, VOL. 67, NO. 4 (JULY-AUGUST 2002); P. 11041114, 11 FIGS., 1 TABLE. 10.1190/1.1500371

    E-Print Network [OSTI]

    Newman, Gregory A.

    Laboratories, Geophysical Technology Department, P.O. Box 5800, MS-0750, Albuquerque, New Mexico 87185-0750. E this mechanism, Klein et al. (1997) show that the high-conductivity contrast between shales and sands results

  17. Modeling the resolution of inexpensive, novel non-seismic geophysical monitoring tools to monitor CO2 injection into coal beds

    E-Print Network [OSTI]

    Gasperikova, E.

    2010-01-01

    on the geophysical properties of coal undergoing CO 2 flood.coal layer, at the depth of 750 m, with the same lateral extent and propertiescoal zones (~300 tons to each zone). A literature search for rock properties

  18. Geophysical Journal International Geophys. J. Int. (2015) 200, 888907 doi: 10.1093/gji/ggu436

    E-Print Network [OSTI]

    2015-01-01

    Faculty of Mathematics, Physics and Informatics, Comenius University Bratislava, Mlynska dolina F1, 842 48 and Engineering, KAUST, Thuwal 23955-6900, Saudi Arabia. E-mail: martin.galis@kaust.edu.sa 2Geophysics Section

  19. Geophysical Journal International Geophys. J. Int. (2015) 202, 787799 doi: 10.1093/gji/ggv183

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    2015-01-01

    in Bratislava, Mlynsk´a dolina F1, 84248 Bratislava, Slovakia 3Institute of Geophysics, Academy of Sciences & Engineering, Barcelona Supercomputing Centre, Carrer del Gran Capit´a 2-4, Barcelona, Spain Accepted 2015

  20. Geophysical Journal International Geophys. J. Int. (2014) 199, 18471860 doi: 10.1093/gji/ggu370

    E-Print Network [OSTI]

    Constable, Steve

    2014-01-01

    Geophysical Journal International Geophys. J. Int. (2014) 199, 1847­1860 doi: 10.1093/gji/ggu370-linear electromagnetics; Marine electromagnetics; Australia. 1 I N T RO D U C T I O N The marine controlled source

  1. Structure of the southern Keweenawan rift from COCORP surveys across the Midcontinent Geophysical Anomaly in northeastern Kansas

    E-Print Network [OSTI]

    Serpa, L.; Setzer, T.; Farmer, H.; Brown, L.; Oliver, J.; Kaufman, S.; Sharp, J.; Steeples, Don W.

    1984-06-01

    COCORP profiling across the midcontinent geophysical anomaly in northeastern Kansas reveals structural basins and other features of the Precambrian Keweenawan rift buried beneath the Phanerozoic cover. The 40-km-wide main basin is asymmetric, with a...

  2. Grouped exposed metal heaters

    DOE Patents [OSTI]

    Vinegar, Harold J. (Bellaire, TX); Coit, William George (Bellaire, TX); Griffin, Peter Terry (Brixham, GB); Hamilton, Paul Taylor (Houston, TX); Hsu, Chia-Fu (Granada Hills, CA); Mason, Stanley Leroy (Allen, TX); Samuel, Allan James (Kular Lumpar, ML); Watkins, Ronnie Wade (Cypress, TX)

    2012-07-31

    A system for treating a hydrocarbon containing formation is described. The system includes two or more groups of elongated heaters. The group includes two or more heaters placed in two or more openings in the formation. The heaters in the group are electrically coupled below the surface of the formation. The openings include at least partially uncased wellbores in a hydrocarbon layer of the formation. The groups are electrically configured such that current flow through the formation between at least two groups is inhibited. The heaters are configured to provide heat to the formation.

  3. Grouped exposed metal heaters

    DOE Patents [OSTI]

    Vinegar, Harold J. (Bellaire, TX); Coit, William George (Bellaire, TX); Griffin, Peter Terry (Brixham, GB); Hamilton, Paul Taylor (Houston, TX); Hsu, Chia-Fu (Granada Hills, CA); Mason, Stanley Leroy (Allen, TX); Samuel, Allan James (Kular Lumpar, MY); Watkins, Ronnie Wade (Cypress, TX)

    2010-11-09

    A system for treating a hydrocarbon containing formation is described. The system includes two or more groups of elongated heaters. The group includes two or more heaters placed in two or more openings in the formation. The heaters in the group are electrically coupled below the surface of the formation. The openings include at least partially uncased wellbores in a hydrocarbon layer of the formation. The groups are electrically configured such that current flow through the formation between at least two groups is inhibited. The heaters are configured to provide heat to the formation.

  4. Crump Geyser: High Precision Geophysics & Detailed Structural Exploration & Slim Well Drilling

    Broader source: Energy.gov [DOE]

    DOE Geothermal Peer Review 2010 - Presentation. Project objectives: Discover new 260F and 300F geothermal reservoirs in Oregon. To demonstrate the application of high precision geophysics for well targeting. Demonstrate a combined testing approach to Flowing Differential Self Potential (FDSP) and electrical tomography resistivity as a guide to exploration and development. Demonstrate utility and benefits of sump-less drilling for a low environmental impact. Create both short and long term employment through exploration, accelerated development timeline and operation.

  5. 35.1 Introduction Flows.involving.phase.change.are.ubiquitous.in.geophysical.and.

    E-Print Network [OSTI]

    Huppert, Herbert

    467 35.1 Introduction Flows.involving.phase.change.are.ubiquitous.in.geophysical.and. industrial.and.atmosphere.but.also.some.that.occur.in.water- saturated.soils,.in.magmatic.systems,.and.in.industrial.processes. 35.2 Principles Changes.of.phase,.from.and.associated.buoyancy.forces..The.importance.of.phase. change.to.a.given.flow.can.be.assessed.by.estimating.certain.key. dimensionless.parameters. 35

  6. Some applications of pipelining techniques in parallel scientific computing 

    E-Print Network [OSTI]

    Deng, Yuanhua

    1996-01-01

    columnwise partitioning schemes. For chasing algorithms, in addition to the pipelining, we apply block-cyclic partitioning, group message-passing techniques to enhance the performance of the pipelined parallel algorithms. The numerical results for the use...

  7. Detector Support Group

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

    browser. Concerns? Hall B Navigation DSG Home Staff Presentations Notes print version Detector Support Group Spotlight Archive Index Rotation test for the SVT detector EPICS...

  8. JLab Users Group

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

    UserResearcher Information print version UG Resources Background & Purpose Users Group Wiki By Laws Board of Directors Board of Directors Minutes Directory of Members Events...

  9. Detailed Geophysical Fault Characterization in Yucca Flat, Nevada Test Site, Nevada

    SciTech Connect (OSTI)

    Theodore H. Asch; Donald Sweetkind; Bethany L. Burton; Erin L. Wallin

    2009-02-10

    Yucca Flat is a topographic and structural basin in the northeastern part of the Nevada Test Site (NTS) in Nye County, Nevada. Between the years 1951 and 1992, 659 underground nuclear tests took place in Yucca Flat; most were conducted in large, vertical excavations that penetrated alluvium and the underlying Cenozoic volcanic rocks. Radioactive and other potential chemical contaminants at the NTS are the subject of a long-term program of investigation and remediation by the U.S. Department of Energy (DOE), National Nuclear Security Administration, Nevada Site Office, under its Environmental Restoration Program. As part of the program, the DOE seeks to assess the extent of contamination and to evaluate the potential risks to humans and the environment from byproducts of weapons testing. To accomplish this objective, the DOE Environmental Restoration Program is constructing and calibrating a ground-water flow model to predict hydrologic flow in Yucca Flat as part of an effort to quantify the subsurface hydrology of the Nevada Test Site. A necessary part of calibrating and evaluating a model of the flow system is an understanding of the location and characteristics of faults that may influence ground-water flow. In addition, knowledge of fault-zone architecture and physical properties is a fundamental component of the containment of the contamination from underground nuclear tests, should such testing ever resume at the Nevada Test Site. The goal of the present investigation is to develop a detailed understanding of the geometry and physical properties of fault zones in Yucca Flat. This study was designed to investigate faults in greater detail and to characterize fault geometry, the presence of fault splays, and the fault-zone width. Integrated geological and geophysical studies have been designed and implemented to work toward this goal. This report describes the geophysical surveys conducted near two drill holes in Yucca Flat, the data analyses performed, and the integrated interpretations developed from the suite of geophysical methodologies utilized in this investigation. Data collection for this activity started in the spring of 2005 and continued into 2006. A suite of electrical geophysical surveys were run in combination with ground magnetic surveys; these surveys resulted in high-resolution subsurface data that portray subsurface fault geometry at the two sites and have identified structures not readily apparent from surface geologic mapping, potential field geophysical data, or surface effects fracture maps.

  10. Mechanical Engineering & Thermal Group

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    LASP's mechanical analysts also lead mechanical verification testing including: random vibration, forceMechanical Engineering & Thermal Group The Mechanical Engineering (ME) & Thermal Group at LASP has, and ground- based mechanical systems. Instrument Design Building on decades of design experience that has

  11. TEC Working Group Topic Groups Archives Protocols Meeting Summaries...

    Office of Environmental Management (EM)

    Working Group Topic Groups Archives Protocols Meeting Summaries Meeting Summaries Philadelphia TEC Meeting, Protocols Topic Group Summary - July 1999 Jacksonville TEC Meeting,...

  12. Group field theories generating polyhedral complexes

    E-Print Network [OSTI]

    Johannes Thürigen

    2015-06-28

    Group field theories are a generalization of matrix models which provide both a second quantized reformulation of loop quantum gravity as well as generating functions for spin foam models. While states in canonical loop quantum gravity, in the traditional continuum setting, are based on graphs with vertices of arbitrary valence, group field theories have been defined so far in a simplicial setting such that states have support only on graphs of fixed valency. This has led to the question whether group field theory can indeed cover the whole state space of loop quantum gravity. In this contribution based on [1] I present two new classes of group field theories which satisfy this objective: i) a straightforward, but rather formal generalization to multiple fields, one for each valency and ii) a simplicial group field theory which effectively covers the larger state space through a dual weighting, a technique common in matrix and tensor models. To this end I will further discuss in some detail the combinatorial structure of the complexes generated by the group field theory partition function. The new group field theories do not only strengthen the links between the mentioned quantum gravity approaches but, broadening the theory space of group field theories, they might also prove useful in the investigation of renormalizability.

  13. Query Optimization Techniques Class Hierarchies

    E-Print Network [OSTI]

    Mannheim, Universität

    Query Optimization Techniques Exploiting Class Hierarchies Sophie Cluet 1 Guido Moerkotte 2 1 INRIA Since the introduction of object base management systems (OBMS), many query optimization techniques tailored for object query languages have been proposed. They adapt known optimization techniques

  14. Rhodes 801-A Rhodes 801-B Group 1: Group 1

    E-Print Network [OSTI]

    Cahay, Marc

    Marie Group 3: Group 3: Bennett, Christopher Paul Davenport, Austin Lovell Creech, Nathan Alan Colburn Worcester, Austin Thomas Group 8: Group 8: TableATableBTableCTableD TableATableBTableCTableD #12;Rhodes 801

  15. Central extensions of Current Groups and the Jacobi Group 

    E-Print Network [OSTI]

    Docherty, Pamela Jane

    2012-11-28

    A current group GX is an infinite-dimensional Lie group of smooth maps from a smooth manifold X to a finite-dimensional Lie group G, endowed with pointwise multiplication. This thesis concerns current groups G§ for compact ...

  16. Biomechanical Classification of Judo Throwing Techniques (Nage Waza)

    E-Print Network [OSTI]

    Attilio Sacripanti

    2008-06-25

    In this paper it is applied the classic mechanical point of view to classify all the movements known as throwing judo techniques; the application of the Newtonian physical methods and principles is able to rationalize the whole matter and to group under only two very simple and clear principles all the movements, before grouped in many generic and not very clear way.

  17. Student Learning Objectives for the MGeo, UHM Dept. of Geology and Geophysics 1. Technical knowledge MGeo graduates are proficient in applying technical knowledge of theory, laboratory methods, field methods, computer

    E-Print Network [OSTI]

    Student Learning Objectives for the MGeo, UHM Dept. of Geology and Geophysics 1. Technical of Geology & Geophysics, approved May 2014 MGeo Degree - "X's" mark key measurement point(s) for that SLO

  18. Experimental Atomic Physics Research in the Budker Group

    E-Print Network [OSTI]

    Budker, Dmitry

    .2 × 10-15 /yr . . . Geophysical: Oklo natural nuclear reactor 1.8 billion years ago: |/| , cryogenics, computer control and data acquisition, vacuum, electronics, theory, scientific writing

  19. Do Core Sample Measurements Record Group or Phase Velocity?

    E-Print Network [OSTI]

    Joe Dellinger, Univ. of Hawaii, Lev Vernik, Stanford Univ.

    2001-08-12

    Laboratory core-sample measurements do not record elas- ..... appear in GEOPHYSICS. ... extreme cases they may measure something hard to interpret.

  20. Exoplanet Detection Techniques

    E-Print Network [OSTI]

    Fischer, Debra A; Laughlin, Greg P; Macintosh, Bruce; Mahadevan, Suvrath; Sahlmann, Johannes; Yee, Jennifer C

    2015-01-01

    We are still in the early days of exoplanet discovery. Astronomers are beginning to model the atmospheres and interiors of exoplanets and have developed a deeper understanding of processes of planet formation and evolution. However, we have yet to map out the full complexity of multi-planet architectures or to detect Earth analogues around nearby stars. Reaching these ambitious goals will require further improvements in instrumentation and new analysis tools. In this chapter, we provide an overview of five observational techniques that are currently employed in the detection of exoplanets: optical and IR Doppler measurements, transit photometry, direct imaging, microlensing, and astrometry. We provide a basic description of how each of these techniques works and discuss forefront developments that will result in new discoveries. We also highlight the observational limitations and synergies of each method and their connections to future space missions.

  1. Resin infiltration transfer technique

    DOE Patents [OSTI]

    Miller, David V. (Pittsburgh, PA); Baranwal, Rita (Glenshaw, PA)

    2009-12-08

    A process has been developed for fabricating composite structures using either reaction forming or polymer infiltration and pyrolysis techniques to densify the composite matrix. The matrix and reinforcement materials of choice can include, but are not limited to, silicon carbide (SiC) and zirconium carbide (ZrC). The novel process can be used to fabricate complex, net-shape or near-net shape, high-quality ceramic composites with a crack-free matrix.

  2. Image compression technique

    DOE Patents [OSTI]

    Fu, C.Y.; Petrich, L.I.

    1997-03-25

    An image is compressed by identifying edge pixels of the image; creating a filled edge array of pixels each of the pixels in the filled edge array which corresponds to an edge pixel having a value equal to the value of a pixel of the image array selected in response to the edge pixel, and each of the pixels in the filled edge array which does not correspond to an edge pixel having a value which is a weighted average of the values of surrounding pixels in the filled edge array which do correspond to edge pixels; and subtracting the filled edge array from the image array to create a difference array. The edge file and the difference array are then separately compressed and transmitted or stored. The original image is later reconstructed by creating a preliminary array in response to the received edge file, and adding the preliminary array to the received difference array. Filling is accomplished by solving Laplace`s equation using a multi-grid technique. Contour and difference file coding techniques also are described. The techniques can be used in a method for processing a plurality of images by selecting a respective compression approach for each image, compressing each of the images according to the compression approach selected, and transmitting each of the images as compressed, in correspondence with an indication of the approach selected for the image. 16 figs.

  3. Image compression technique

    DOE Patents [OSTI]

    Fu, Chi-Yung (San Francisco, CA); Petrich, Loren I. (Livermore, CA)

    1997-01-01

    An image is compressed by identifying edge pixels of the image; creating a filled edge array of pixels each of the pixels in the filled edge array which corresponds to an edge pixel having a value equal to the value of a pixel of the image array selected in response to the edge pixel, and each of the pixels in the filled edge array which does not correspond to an edge pixel having a value which is a weighted average of the values of surrounding pixels in the filled edge array which do correspond to edge pixels; and subtracting the filled edge array from the image array to create a difference array. The edge file and the difference array are then separately compressed and transmitted or stored. The original image is later reconstructed by creating a preliminary array in response to the received edge file, and adding the preliminary array to the received difference array. Filling is accomplished by solving Laplace's equation using a multi-grid technique. Contour and difference file coding techniques also are described. The techniques can be used in a method for processing a plurality of images by selecting a respective compression approach for each image, compressing each of the images according to the compression approach selected, and transmitting each of the images as compressed, in correspondence with an indication of the approach selected for the image.

  4. Shift Invariant Spaces on Lca Groups

    E-Print Network [OSTI]

    Cabrelli, Carlos

    2009-01-01

    In this article we extend the theory of shift-invariant spaces to the context of LCA groups. We introduce the notion of H-invariant space for a countable discrete subgroup H of an LCA group G, and show that the concept of range function and the techniques of fiberization are valid in this context. As a consequence of this generalization we prove characterizations of frames and Riesz bases of these spaces extending previous results, that were known for Rd and the lattice Zd .

  5. GG101 Lab, Fall Semester 2015 SYLLABUS GG101L is where you learn how to learn Geology and Geophysics (i.e., learning by doing). We will

    E-Print Network [OSTI]

    GG101 Lab, Fall Semester 2015 SYLLABUS GG101L is where you learn how to learn Geology and Geophysics (i.e., learning by doing). We will teach you geological and geophysical content, teach you how Handout 2, 3, 5 8, Oct. 12 #8: Earthquakes (in the field) Chapter 16 1, 2, 3, 5 9, Oct. 19 #9: Geologic

  6. Summary Report from the Accelerator Working Group M. Harrison

    E-Print Network [OSTI]

    Wurtele, Jonathan

    colliders, muon colliders, very high energy hadron colliders, and advanced acceleration techniques Group at Snowmass was organized into five working sub-groups (all energies refer to center-of-mass): 1 of the community with respect to technical issues and identification of possible paths to a 1.5 TeV collision

  7. Adams-R-D, Thickness of the earth's crust beneath the Pacific-Antarctic ridge, New Zealand Journal of Geology and Geophysics. 7; 3, Pages 529-542. 1964.

    E-Print Network [OSTI]

    Menke, William

    Journal of Geology and Geophysics. 7; 3, Pages 529-542. 1964. Allen,-R-M., The mantle plume beneath-frequency traveltimes; I, Theory, Geophysical Journal International. 141; 1, Pages 157-174. 2000. Forsyth-D-W , Rayleigh Wave Phase Velocity Variations in a Regionalized Pacific, Eos, Transactions, American Geophysical Union

  8. Department of Geology and Geophysics Frederick A. Sutton Building 115 South 1460 East, Room 383, Salt Lake City, Utah 84112-0102 (801) 581-7162 FAX (801) 581-7065

    E-Print Network [OSTI]

    Johnson, Cari

    Department of Geology and Geophysics ­ Frederick A. Sutton Building 115 South 1460 East, Room 383/2012 Deed of Gift to The University of Utah Department of Geology and Geophysics Donor's Information, to the Department of Geology and Geophysics of the University of Utah as an unrestricted gift. Filled out and sign

  9. Illinois Wind Workers Group

    SciTech Connect (OSTI)

    David G. Loomis

    2012-05-28

    The Illinois Wind Working Group (IWWG) was founded in 2006 with about 15 members. It has grown to over 200 members today representing all aspects of the wind industry across the State of Illinois. In 2008, the IWWG developed a strategic plan to give direction to the group and its activities. The strategic plan identifies ways to address critical market barriers to the further penetration of wind. The key to addressing these market barriers is public education and outreach. Since Illinois has a restructured electricity market, utilities no longer have a strong control over the addition of new capacity within the state. Instead, market acceptance depends on willing landowners to lease land and willing county officials to site wind farms. Many times these groups are uninformed about the benefits of wind energy and unfamiliar with the process. Therefore, many of the project objectives focus on conferences, forum, databases and research that will allow these stakeholders to make well-educated decisions.

  10. Applied ALARA techniques

    SciTech Connect (OSTI)

    Waggoner, L.O.

    1998-02-05

    The presentation focuses on some of the time-proven and new technologies being used to accomplish radiological work. These techniques can be applied at nuclear facilities to reduce radiation doses and protect the environment. The last reactor plants and processing facilities were shutdown and Hanford was given a new mission to put the facilities in a safe condition, decontaminate, and prepare them for decommissioning. The skills that were necessary to operate these facilities were different than the skills needed today to clean up Hanford. Workers were not familiar with many of the tools, equipment, and materials needed to accomplish:the new mission, which includes clean up of contaminated areas in and around all the facilities, recovery of reactor fuel from spent fuel pools, and the removal of millions of gallons of highly radioactive waste from 177 underground tanks. In addition, this work has to be done with a reduced number of workers and a smaller budget. At Hanford, facilities contain a myriad of radioactive isotopes that are 2048 located inside plant systems, underground tanks, and the soil. As cleanup work at Hanford began, it became obvious early that in order to get workers to apply ALARA and use hew tools and equipment to accomplish the radiological work it was necessary to plan the work in advance and get radiological control and/or ALARA committee personnel involved early in the planning process. Emphasis was placed on applying,ALARA techniques to reduce dose, limit contamination spread and minimize the amount of radioactive waste generated. Progress on the cleanup has,b6en steady and Hanford workers have learned to use different types of engineered controls and ALARA techniques to perform radiological work. The purpose of this presentation is to share the lessons learned on how Hanford is accomplishing radiological work.

  11. EdgeWrite: A New Text Entry Technique Designed for Stability EdgeWrite: A New Text Entry Technique Designed for Stability

    E-Print Network [OSTI]

    Wobbrock, Jacob O.

    EdgeWrite: A New Text Entry Technique Designed for Stability Page 1 EdgeWrite: A New Text Entry of cost, complexity, and maintenance (2). If we had a text entry technique that could be used that benefits one group may therefore benefit the other. #12;EdgeWrite: A New Text Entry Technique Designed

  12. Applied Science/Techniques

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

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

  13. Three-Dimensional Surface Geophysical Exploration of the 200-Series Tanks at the 241-C Tank Farm

    SciTech Connect (OSTI)

    Crook, N.; McNeill, M.; Dunham, Ralph; Glaser, Danney R.

    2014-02-26

    A surface geophysical exploration (SGE) survey using direct current electrical resistivity was conducted within the C Tank Farm in the vicinity of the 200-Series tanks at the Hanford Site near Richland, Washington. This survey was the second successful SGE survey to utilize the Geotection(TM)-180 Resistivity Monitoring System which facilitated a much larger survey size and faster data acquisition rate. The primary objective of the C Tank Farm SGE survey was to provide geophysical data and subsurface imaging results to support the Phase 2 RCRA Facility Investigation, as outlined in the Phase 2 RCRA Facility Investigation / Corrective Measures work plan RPP-PLAN-39114.

  14. Upgraded Coal Interest Group

    SciTech Connect (OSTI)

    Evan Hughes

    2009-01-08

    The Upgraded Coal Interest Group (UCIG) is an EPRI 'users group' that focuses on clean, low-cost options for coal-based power generation. The UCIG covers topics that involve (1) pre-combustion processes, (2) co-firing systems and fuels, and (3) reburn using coal-derived or biomass-derived fuels. The UCIG mission is to preserve and expand the economic use of coal for energy. By reducing the fuel costs and environmental impacts of coal-fired power generation, existing units become more cost effective and thus new units utilizing advanced combustion technologies are more likely to be coal-fired.

  15. Bell, group and tangle

    SciTech Connect (OSTI)

    Solomon, A. I.

    2010-03-15

    The 'Bell' of the title refers to bipartite Bell states, and their extensions to, for example, tripartite systems. The 'Group' of the title is the Braid Group in its various representations; while 'Tangle' refers to the property of entanglement which is present in both of these scenarios. The objective of this note is to explore the relation between Quantum Entanglement and Topological Links, and to show that the use of the language of entanglement in both cases is more than one of linguistic analogy.

  16. 12. Automatic Groups Suppose

    E-Print Network [OSTI]

    Gilman, Robert

    for the generator a to the automaton in Figure 1, we obtain a synchronized automaton which accepts a linear language12. Automatic Groups Suppose : G is a choice of generators, and R is a rational language which are all synchronous and rational. We will define synchronous presently. R and are called an automatic

  17. Geophysical Monitoring Methods Evaluation for the FutureGen 2.0 Project

    SciTech Connect (OSTI)

    Strickland, Chris E.; USA, Richland Washington; Vermeul, Vince R.; USA, Richland Washington; Bonneville, Alain; USA, Richland Washington; Sullivan, E. Charlotte; USA, Richland Washington; Johnson, Tim C.; USA, Richland Washington; Spane, Frank A.; USA, Richland Washington; Gilmore, Tyler J.; USA, Richland Washington

    2014-12-31

    A comprehensive monitoring program will be needed in order to assess the effectiveness of carbon sequestration at the FutureGen 2.0 carbon capture and storage (CCS) field-site. Geophysical monitoring methods are sensitive to subsurface changes that result from injection of CO2 and will be used for: (1) tracking the spatial extent of the free phase CO2 plume, (2) monitoring advancement of the pressure front, (3) identifying or mapping areas where induced seismicity occurs, and (4) identifying and mapping regions of increased risk for brine or CO2 leakage from the reservoir. Site-specific suitability and cost effectiveness were evaluated for a number of geophysical monitoring methods including: passive seismic monitoring, reflection seismic imaging, integrated surface deformation, time-lapse gravity, pulsed neutron capture logging, cross-borehole seismic, electrical resistivity tomography, magnetotellurics and controlled source electromagnetics. The results of this evaluation indicate that CO2 injection monitoring using reflection seismic methods would likely be difficult at the FutureGen 2.0 site. Electrical methods also exhibited low sensitivity to the expected CO2 saturation changes and would be affected by metallic infrastructure at the field site. Passive seismic, integrated surface deformation, time-lapse gravity, and pulsed neutron capture monitoring were selected for implementation as part of the FutureGen 2.0 storage site monitoring program.

  18. Terracentric Nuclear Fission Reactor: Background, Basis, Feasibility, Structure, Evidence, and Geophysical Implications

    E-Print Network [OSTI]

    J. Marvin Herndon

    2013-12-31

    The background, basis, feasibility, structure, evidence, and geophysical implications of a naturally occurring Terracentric nuclear fission georeactor are reviewed. For a nuclear fission reactor to exist at the center of the Earth, all of the following conditions must be met: (1) There must originally have been a substantial quantity of uranium within Earth's core; (2) There must be a natural mechanism for concentrating the uranium; (3) The isotopic composition of the uranium at the onset of fission must be appropriate to sustain a nuclear fission chain reaction; (4) The reactor must be able to breed a sufficient quantity of fissile nuclides to permit operation over the lifetime of Earth to the present; (5) There must be a natural mechanism for the removal of fission products; (6) There must be a natural mechanism for removing heat from the reactor; (7) There must be a natural mechanism to regulate reactor power level, and; (8) The location of the reactor or must be such as to provide containment and prevent meltdown. Herndon's georeactor alone is shown to meet those conditions. Georeactor existence evidence based upon helium measurements and upon antineutrino measurements is described. Geophysical implications discussed include georeactor origin of the geomagnetic field, geomagnetic reversals from intense solar outbursts and severe Earth trauma, as well as georeactor heat contributions to global dynamics.

  19. Geophysical Monitoring Methods Evaluation for the FutureGen 2.0 Project

    SciTech Connect (OSTI)

    Strickland, Chris E. [Pacific Northwest National Laboratory; Richland Washington USA; Vermeul, Vince R. [Pacific Northwest National Laboratory; Richland Washington USA; Bonneville, Alain [Pacific Northwest National Laboratory; Richland Washington USA; Sullivan, E. Charlotte [Pacific Northwest National Laboratory; Richland Washington USA; Johnson, Tim C. [Pacific Northwest National Laboratory; Richland Washington USA; Spane, Frank A. [Pacific Northwest National Laboratory; Richland Washington USA; Gilmore, Tyler J. [Pacific Northwest National Laboratory; Richland Washington USA

    2014-12-31

    A comprehensive monitoring program will be needed in order to assess the effectiveness of carbon sequestration at the FutureGen 2.0 carbon capture and storage (CCS) field-site. Geophysical monitoring methods are sensitive to subsurface changes that result from injection of CO2 and will be used for: (1) tracking the spatial extent of the free phase CO2 plume, (2) monitoring advancement of the pressure front, (3) identifying or mapping areas where induced seismicity occurs, and (4) identifying and mapping regions of increased risk for brine or CO2 leakage from the reservoir. Site-specific suitability and cost effectiveness were evaluated for a number of geophysical monitoring methods including: passive seismic monitoring, reflection seismic imaging, integrated surface deformation, time-lapse gravity, pulsed neutron capture logging, cross-borehole seismic, electrical resistivity tomography, magnetotellurics and controlled source electromagnetics. The results of this evaluation indicate that CO2 injection monitoring using reflection seismic methods would likely be difficult at the FutureGen 2.0 site. Electrical methods also exhibited low sensitivity to the expected CO2 saturation changes and would be affected by metallic infrastructure at the field site. Passive seismic, integrated surface deformation, time-lapse gravity, and pulsed neutron capture monitoring were selected for implementation as part of the FutureGen 2.0 storage site monitoring program.

  20. Geophysics: Building E5190 decommissioning, Aberdeen Proving Ground. Interim progress report

    SciTech Connect (OSTI)

    Miller, S.F.; Thompson, M.D.; McGinnis, M.G.; McGinnis, L.D.

    1992-07-01

    Building E5190 is one of ten potentially contaminated sites in the Canal Creek area of the Edgewood section of Aberdeen Proving Ground examined by a geophysical team from Argonne National Laboratory in April and May 1992. A noninvasive geophysical survey, including the complementary technologies of magnetics, electrical resistivity, and ground-penetrating radar, was conducted around the perimeter as a guide to developing a sampling and monitoring program prior to decommissioning and dismantling the building. The magnetics surveys indicated that multistation, positive magnetic sources are randomly distributed north and west of the building. Two linear trends were noted: one that may outline buried utility lines and another that is produced by a steel-covered trench. The resistivity profiling indicated three conductive zones: one due to increased moisture in a ditch, one associated with buried utility lines, and a third zone associated with the steel-covered trench. Ground-penetrating radar imaging detected two significant anomalies, which were correlated with small-amplitude magnetic anomalies. The objectives of the study -- to detect and locate objects and to characterize a located object were achieved.

  1. Geophysical Monitoring Methods Evaluation for the FutureGen 2.0 Project

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

    Strickland, Chris E.; USA, Richland Washington; Vermeul, Vince R.; USA, Richland Washington; Bonneville, Alain; USA, Richland Washington; Sullivan, E. Charlotte; USA, Richland Washington; Johnson, Tim C.; USA, Richland Washington; et al

    2014-12-31

    A comprehensive monitoring program will be needed in order to assess the effectiveness of carbon sequestration at the FutureGen 2.0 carbon capture and storage (CCS) field-site. Geophysical monitoring methods are sensitive to subsurface changes that result from injection of CO2 and will be used for: (1) tracking the spatial extent of the free phase CO2 plume, (2) monitoring advancement of the pressure front, (3) identifying or mapping areas where induced seismicity occurs, and (4) identifying and mapping regions of increased risk for brine or CO2 leakage from the reservoir. Site-specific suitability and cost effectiveness were evaluated for a number ofmore »geophysical monitoring methods including: passive seismic monitoring, reflection seismic imaging, integrated surface deformation, time-lapse gravity, pulsed neutron capture logging, cross-borehole seismic, electrical resistivity tomography, magnetotellurics and controlled source electromagnetics. The results of this evaluation indicate that CO2 injection monitoring using reflection seismic methods would likely be difficult at the FutureGen 2.0 site. Electrical methods also exhibited low sensitivity to the expected CO2 saturation changes and would be affected by metallic infrastructure at the field site. Passive seismic, integrated surface deformation, time-lapse gravity, and pulsed neutron capture monitoring were selected for implementation as part of the FutureGen 2.0 storage site monitoring program.« less

  2. Data Mining Group VNG Corporation

    E-Print Network [OSTI]

    Shahabi, Cyrus

    Data Mining Group VNG Corporation Data Mining Group_VNG Corporation 1 #12;Data Mining Group_VNG Corporation 2 1 ·Introduction 2 ·Edge Rank 3 ·Parameter Estimate 4 ·Conclusion #12;Data Mining Group_VNG Corporation 3 #12;Data Mining Group_VNG Corporation 4 #12; User's self activity Update status Write blogs

  3. TEC Working Group Topic Groups Archives Communications Conference...

    Office of Environmental Management (EM)

    Communications Conference Call Summaries TEC Working Group Topic Groups Archives Communications Conference Call Summaries Conference Call Summaries Conference Call Summary April...

  4. TEC Working Group Topic Groups Routing Conference Call Summaries...

    Office of Environmental Management (EM)

    Routing Conference Call Summaries TEC Working Group Topic Groups Routing Conference Call Summaries CONFERENCE CALL SUMMARIES January 31, 2008 December 6, 2007 October 4, 2007...

  5. TEC Working Group Topic Groups Security Conference Call Summaries...

    Office of Environmental Management (EM)

    Conference Call Summaries TEC Working Group Topic Groups Security Conference Call Summaries Conference Call Summaries August 17, 2006 (Draft) July 18, 2006 (Draft) June 20, 2006...

  6. TEC Working Group Topic Groups Archives Mechanics of Funding...

    Office of Environmental Management (EM)

    Mechanics of Funding and Techical Assistance TEC Working Group Topic Groups Archives Mechanics of Funding and Techical Assistance Mechanics of Funding and Techical Assistance Items...

  7. CORRELATION BETWEEN GROUP LOCAL DENSITY AND GROUP LUMINOSITY

    SciTech Connect (OSTI)

    Deng Xinfa; Yu Guisheng

    2012-11-10

    In this study, we investigate the correlation between group local number density and total luminosity of groups. In four volume-limited group catalogs, we can conclude that groups with high luminosity exist preferentially in high-density regions, while groups with low luminosity are located preferentially in low-density regions, and that in a volume-limited group sample with absolute magnitude limit M{sub r} = -18, the correlation between group local number density and total luminosity of groups is the weakest. These results basically are consistent with the environmental dependence of galaxy luminosity.

  8. TEC Working Group Topic Groups Rail Meeting Summaries | Department...

    Office of Environmental Management (EM)

    - March 15, 2006 Pueblo TEC Meeting, Rail Topic Group Summary - September 22, 2005 Phoenix TEC Meeting, Rail Topic Group Summary - April 4, 2005 Minneapolis TEC Meeting, Rail...

  9. 2001 Journal of Geophysical Research Vol 106 (C3), pp 4593-4612 Internal hydraulic flows on the continental shelf

    E-Print Network [OSTI]

    Balasubramanian, Ravi

    hydraulic jump. The dissipation rate of turbulent energy is consistent with the mean energy removal rate elevation associated with hydraulic jumps. These arise when a flow dominated by kinetic energy (ac 2001 Journal of Geophysical Research Vol 106 (C3), pp 4593-4612 Internal hydraulic flows

  10. GEOPHYSICS, VOL. 62, NO. 4 (JULY-AUGUST 1997); P. 11511162, 9 FIGS. Effects of pore structure and wettability on

    E-Print Network [OSTI]

    Knight, Rosemary

    and Rosemary J. Knight ABSTRACT A network model of porous media is used to assess the effects of pore structure distribution of water. The effects of pore structure are assessed by varying pore size distributionGEOPHYSICS, VOL. 62, NO. 4 (JULY-AUGUST 1997); P. 1151­1162, 9 FIGS. Effects of pore structure

  11. A multi-physics, integrated approach to formation evaluation using borehole geophysical measurements and 3D seismic data

    E-Print Network [OSTI]

    Torres-Verdín, Carlos

    A multi-physics, integrated approach to formation evaluation using borehole geophysical at Austin Summary This paper describes a methodology for formation evaluation based on the integration and DC resistivity sensors. Finally, 3D seismic data, post-stack and pre-stack, are used to ascertain

  12. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Evaluation of 'all weather' microwave-derived land

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Evaluation of 'all weather measurements over land are still limited, especially under cloudy con- ditions. Ts estimates from infrared water vapor, cloud liquid wa- ter, and surface emissivities over land from Special Sensor Microwave / Im

  13. Nonlinear Processes in Geophysics, 12, 527536, 2005 SRef-ID: 1607-7946/npg/2005-12-527

    E-Print Network [OSTI]

    Boyer, Edmond

    Processes in Geophysics The COSMO-LEPS mesoscale ensemble system: validation of the methodology been designed to have a probabilistic support at the mesoscale, fo- cusing the attention on extreme a challenging problem. The key role played by mesoscale and orographic- related processes can seriously limit

  14. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Source Properties of Dynamic Rupture Pulses with Off-Fault

    E-Print Network [OSTI]

    Ampuero, Jean Paul

    at systematically quantifying the influ- ence of plastic energy dissipation on pulse properties, such 1SwissJOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Source Properties of Dynamic Rupture Pulses with Off-Fault Plasticity A.-A. Gabriel1,2 , J.-P. Ampuero3 , L. A. Dalguer1 , and P. M. Mai4

  15. GEOPHYSICAL RESEARCH LETTERS, VOL. 28, NO. 8, APRIL15, PAGES 1507-1510, 2001 Tropical Atlantic air-sea interaction

    E-Print Network [OSTI]

    McCreary Jr., Julian P.

    GEOPHYSICAL RESEARCH LETTERS, VOL. 28, NO. 8, APRIL15, PAGES 1507-1510, 2001 Tropical Atlantic air- quate at this time, and it is currently under debate whether it represents a mode of air-sea interaction to the extratropics. 2. GCM experiments The global AGCM is a Japanese community model de- scribed by Numaguti [1999

  16. GEOPHYSICAL RESEARCH LETTERS, VOL. 28, NO. 8, PAGES 1507-1510, APRIL 15, 2001 Tropical Atlantic air-sea interaction

    E-Print Network [OSTI]

    Xie, Shang-Ping

    GEOPHYSICAL RESEARCH LETTERS, VOL. 28, NO. 8, PAGES 1507-1510, APRIL 15, 2001 Tropical Atlantic air- quate at this time, and it is currently under debate whether it represents a mode of air-sea interaction to the extratropics. 2. GCM experiments The global AGCM is a Japanese community model de- scribed by Numaguti [1999

  17. GEOPHYSICS, VOL. 69, NO. 3 (MAY-JUNE 2004); P. 708718, 17 FIGS. 10.1190/1.1759457

    E-Print Network [OSTI]

    Tsvankin, Ilya

    - ally heterogeneous anisotropic models for prestack depth migration. The algorithm for P-wave migration is implemented as an iterative two-step pro- cedure that includes prestack depth migration (imaging stepGEOPHYSICS, VOL. 69, NO. 3 (MAY-JUNE 2004); P. 708­718, 17 FIGS. 10.1190/1.1759457 Migration

  18. Gaussian packet pre{stack depth migration Department of Geophysics, Charles University, Ke Karlovu 3, 121 16 Praha 2, Czech

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Gaussian packet pre{stack depth migration Karel #20; Z#19;a#20;cek Department of Geophysics method | the Gaussian packet pre{stack depth migration. The advantages over the methods based on Gaussian pre{stack depth migration is especially suitable for a target{oriented imaging. Key words Gaussian

  19. Nonlinear Processes in Geophysics (2005) 12: 311320 SRef-ID: 1607-7946/npg/2005-12-311

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    2005-01-01

    Processes in Geophysics Forced versus coupled dynamics in Earth system modelling and prediction B. Knopf1, H, a crucial element of Earth System modelling. Since the cur- rently preferred strategy for simulating. Such a simplifying tech- nique is often employed in Earth System models in order to save computing resources

  20. GEOPHYSICAL RESEARCH LETTERS, VOL. 0, NO. 0, PAGES 0-0, M 0, 2001 On the Pacific Ocean regime shift

    E-Print Network [OSTI]

    GEOPHYSICAL RESEARCH LETTERS, VOL. 0, NO. 0, PAGES 0-0, M 0, 2001 On the Pacific Ocean regime shift variability of Pacific Ocean upper ocean heat content is examined for the 1948-1998 period using gridded-wide phenomenon affecting the thermal structure from 60 S to 70 N. EOF analysis of the Pacific Ocean heat content

  1. will appear in Journal of Geophysical Research, 2001. Observations of turbulence in a tidal beam and across a coastal ridge

    E-Print Network [OSTI]

    Lien, Ren-Chieh

    1 will appear in Journal of Geophysical Research, 2001. Observations of turbulence in a tidal beam the turbulence kinetic energy dissipation rate exceeded 10-6 W kg-1 , and the diapycnal eddy diffusivity K varied by a factor of 100 with a semidiurnal tidal periodicity; the isopycnal displacement confirmed

  2. GEOPHYSICS, VOL. 47, NO. 10 (OCTOBER 1982); P. 1413-1421, 9 FIGS. The signature of an air gun array

    E-Print Network [OSTI]

    GEOPHYSICS, VOL. 47, NO. 10 (OCTOBER 1982); P. 1413-1421, 9 FIGS. The signature of an air gun array. Haugland$ ABSTRACT We designed a system to enable the signatureof an air gun array to be calculatedat any [subject of a patent application]. The number of these measurementsmust not be less than the number of guns

  3. Geophysical Journal International Geophys. J. Int. (2015) 201, 17651780 doi: 10.1093/gji/ggv107

    E-Print Network [OSTI]

    Key, Kerry

    2015-01-01

    for electromagnetic inversion Brent Wheelock,1 Steven Constable2 and Kerry Key2 1ExxonMobil Upstream Research Company GJI Marine geosciences and applied geophysics The advantages of logarithmically scaled data A R Y Non-linear inversion algorithms traverse a data misfit space over multiple iterations of trial

  4. GEOPHYSICAL RESEARCH LETTERS, VOL. 0, NO. 0, PAGES 0-0, M 0, 2001 Viscoelastic Folding: Maxwell versus Kelvin Rheology

    E-Print Network [OSTI]

    Podladchikov, Yuri

    -parallel stress to shear modulus. A layer with Maxwell rheology approximates this limit that generates the fastest, since the Kelvin rheology yields an identical bending moment. A critical elastic layer thick- ness, R2 H Copyright 2001 by the American Geophysical Union. Paper number 1999GL000000. 0094-8276/01/1999GL000000

  5. GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, The location of potential energy sources and the

    E-Print Network [OSTI]

    Edwards, Neil

    that dense water export from the Atlantic depends on a poten- tial energy (PE) sink, associated with denseGEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, The location of potential energy sources and the export of dense water from the Atlantic Ocean K. I. C. Oliver 1,2 , N. R. Edwards 1 Kevin

  6. Geophysical Journal International Geophys. J. Int. (2013) 193, 238251 doi: 10.1093/gji/ggs080

    E-Print Network [OSTI]

    Snieder, Roel

    2013-01-01

    -0006, Japan. E-mail: sawa@bosai.go.jp 2Center for Wave Phenomena, Department of Geophysics, Colorado School of VP, VS and shear wave splitting parameters are explained by the generation of omnidirectional cracks GJISeismology Time-lapse changes of P- and S-wave velocities and shear wave splitting in the first year after

  7. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Pore pressure evolution in deforming granular1

    E-Print Network [OSTI]

    Toussaint, Renaud

    JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Pore pressure evolution in deforming. Often deformation of the granular network leads to pore fluid8 pressure (PP) changes. If the PP rises coupling6 between two deforming phases: the solid granular network and the fluid-filled7 pore network

  8. GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, How pore fluid pressurization influences crack tip processes

    E-Print Network [OSTI]

    GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, How pore fluid pressurization temperature and pore pressure rises along a steadily propagating shear crack, assuming a given shear stress profile along the crack (i.e., initially neglecting effects of pore pressure on shear stress

  9. GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, A Physical Model for Seismic Noise Generation from Sediment

    E-Print Network [OSTI]

    Ampuero, Jean Paul

    GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, A Physical Model for Seismic Noise noise induced by the transport of sediment in rivers. The model pro- vides an expression for the power on seismic noise observations. The model predictions for the PSD are consistent with recent measurements and

  10. Geological, geochemical, and geophysical survey of the geothermal resources at Hot Springs Bay Valley, Akutan Island, Alaska

    SciTech Connect (OSTI)

    Motyka, R.J.; Wescott, E.M.; Turner, D.L.; Swanson, S.E.; Romick, J.D.; Moorman, M.A.; Poreda, R.J.; Witte, W.; Petzinger, B.; Allely, R.D.

    1985-01-01

    An extensive survey was conducted of the geothermal resource potential of Hot Springs Bay Valley on Akutan Island. A topographic base map was constructed, geologic mapping, geophysical and geochemical surveys were conducted, and the thermal waters and fumarolic gases were analyzed for major and minor element species and stable isotope composition. (ACR)

  11. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Examination of Type II Origin with SOHO/LASCO

    E-Print Network [OSTI]

    JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Examination of Type II Origin.-S. CHO ET AL.: EXAMINATION OF TYPE II ORIGIN Abstract. We examine a possibility that metric-type II solar radio bursts are all caused by CME generated shocks. For this we consider 129 type IIs- flare events

  12. Using time-lapse seismics as a reservoir-monitoring tool, geophysics can help distinguish different reservoir pro-

    E-Print Network [OSTI]

    reservoir pro- duction scenarios. For example, Eiken et al. (2000) success- fully detected fluid-saturation life, oil saturation usually decreases, reservoir pressure declines, and gas breakout may occurUsing time-lapse seismics as a reservoir-monitoring tool, geophysics can help distinguish different

  13. Lyapunov exponents for 2-D ray tracing without interfaces Ludek Klimes , Department of Geophysics, Charles University, Prague, Czech Republic

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Lyapunov exponents for 2-D ray tracing without interfaces Ludek Klimes , Department of Geophysics, Charles University, Prague, Czech Republic Summary The Lyapunov exponents asymptotically quantify the ex- ponential divergence of rays. The \\Lyapunov exponent" for a nite 2-D ray and the average \\Lyapunov exponents

  14. Lyapunov exponents for 2D ray tracing without interfaces Ludek Klimes \\Lambda , Department of Geophysics, Charles University, Prague, Czech Republic

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Lyapunov exponents for 2­D ray tracing without interfaces LudŸek KlimeŸs \\Lambda , Department of Geophysics, Charles University, Prague, Czech Republic Summary The Lyapunov exponents asymptotically quantify the ex­ ponential divergence of rays. The ``Lyapunov exponent'' for a finite 2­D ray and the average

  15. GEOPHYSICS, VOL. 67, NO. 5 (SEPTEMBER-OCTOBER 2002); P. 13821395, 16 FIGS. 10.1190/1.1512784

    E-Print Network [OSTI]

    Tsvankin, Ilya

    History Joint inversion of PP and PS reflection data for VTI media: A North Sea case study Vladimir- ticomponent stacking-velocity tomography to a 2-D line acquired over the lower Tertiary Siri reservoirGEOPHYSICS, VOL. 67, NO. 5 (SEPTEMBER-OCTOBER 2002); P. 1382­1395, 16 FIGS. 10.1190/1.1512784 Case

  16. GEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 15, PAGES 22452248, AUGUST 1, 2000 Subsurface nuclear tests monitoring through the

    E-Print Network [OSTI]

    Hourdin, Chez Frédéric

    GEOPHYSICAL RESEARCH LETTERS, VOL. 27, NO. 15, PAGES 2245­2248, AUGUST 1, 2000 Sub­surface nuclear nuclear tests down to 1 kiloton (kt) TNT equivalent anywhere on the planet. The IMS is based upon four waves will help check for underground, under­water and atmospheric nuclear tests. The fourth network

  17. Wind Bias from Sub-optimal Estimation Due to Geophysical Modeling Error Paul E. Johnson and David G . Long

    E-Print Network [OSTI]

    Long, David G.

    Wind Bias from Sub-optimal Estimation Due to Geophysical Modeling Error -Wind I Paul E. Johnson (which relates the wind to the normalized radar cross section, NRCS, of the ocean surface) is uncertainty in the NRCS for given wind conditions. When the estimated variability is in- cluded in the maximum likelihood

  18. Power Systems Group Home Page

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

    Systems Division Search APS ... Search Button About ASD General Information ASD Groups ESHQA Operations Argonne Home > Advanced Photon Source > Power Systems Group This page is...

  19. Geophysical monitoring and reactive transport modeling of ureolytically-driven calcium carbonate precipitation

    SciTech Connect (OSTI)

    Wu, Y.; Ajo-Franklin, J.B.; Spycher, N.; Hubbard, S.S.; Zhang, G.; Williams, K.H.; Taylor, J.; Fujita, Y.; Smith, R.

    2011-07-15

    Ureolytically-driven calcium carbonate precipitation is the basis for a promising in-situ remediation method for sequestration of divalent radionuclide and trace metal ions. It has also been proposed for use in geotechnical engineering for soil strengthening applications. Monitoring the occurrence, spatial distribution, and temporal evolution of calcium carbonate precipitation in the subsurface is critical for evaluating the performance of this technology and for developing the predictive models needed for engineering application. In this study, we conducted laboratory column experiments using natural sediment and groundwater to evaluate the utility of geophysical (complex resistivity and seismic) sensing methods, dynamic synchrotron x-ray computed tomography (micro-CT), and reactive transport modeling for tracking ureolytically-driven calcium carbonate precipitation processes under site relevant conditions. Reactive transport modeling with TOUGHREACT successfully simulated the changes of the major chemical components during urea hydrolysis. Even at the relatively low level of urea hydrolysis observed in the experiments, the simulations predicted an enhanced calcium carbonate precipitation rate that was 3-4 times greater than the baseline level. Reactive transport modeling results, geophysical monitoring data and micro-CT imaging correlated well with reaction processes validated by geochemical data. In particular, increases in ionic strength of the pore fluid during urea hydrolysis predicted by geochemical modeling were successfully captured by electrical conductivity measurements and confirmed by geochemical data. The low level of urea hydrolysis and calcium carbonate precipitation suggested by the model and geochemical data was corroborated by minor changes in seismic P-wave velocity measurements and micro-CT imaging; the latter provided direct evidence of sparsely distributed calcium carbonate precipitation. Ion exchange processes promoted through NH{sub 4}{sup +} production during urea hydrolysis were incorporated in the model and captured critical changes in the major metal species. The electrical phase increases were potentially due to ion exchange processes that modified charge structure at mineral/water interfaces. Our study revealed the potential of geophysical monitoring for geochemical changes during urea hydrolysis and the advantages of combining multiple approaches to understand complex biogeochemical processes in the subsurface.

  20. Using Groupings of Static Analysis Alerts to Identify Files Likely to Contain Field Failures

    E-Print Network [OSTI]

    Sherriff, Mark S.

    of a field failure. Our technique uses singular value decomposition to generate groupings of static analysisUsing Groupings of Static Analysis Alerts to Identify Files Likely to Contain Field Failures Mark S@csc.ncsu.edu ABSTRACT In this paper, we propose a technique for leveraging historical field failure records

  1. ALS Communications Group

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode Design to Improve4AJ01) (See Energy Level79AJ01)19^ U N I T ECommunications Group

  2. Working Group Reports

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorking WithTelecentricNCubictheThepresented in1: Model or Working Group

  3. Helms Research Group - Home

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journalvivo Low-DoseOptions forHeavy-Duty Waste HaulerHeikoHe,Helms Group

  4. Research Groups - Cyclotron Institute

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

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

  5. Running Jobs by Group

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) byMultidayAlumni > The Energy MaterialsRooftopRunning Jobs by Group

  6. DOE STGWG Group

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergy A plug-in electric vehicle10nominateEnergyThis memo fromDepartment ofSTGWG Group

  7. Technique for fast and efficient hierarchical clustering

    DOE Patents [OSTI]

    Stork, Christopher

    2013-10-08

    A fast and efficient technique for hierarchical clustering of samples in a dataset includes compressing the dataset to reduce a number of variables within each of the samples of the dataset. A nearest neighbor matrix is generated to identify nearest neighbor pairs between the samples based on differences between the variables of the samples. The samples are arranged into a hierarchy that groups the samples based on the nearest neighbor matrix. The hierarchy is rendered to a display to graphically illustrate similarities or differences between the samples.

  8. Steam Generator Group Project. Task 6. Channel head decontamination

    SciTech Connect (OSTI)

    Allen, R.P.; Clark, R.L.; Reece, W.D.

    1984-08-01

    The Steam Generator Group Project utilizes a retired-from-service pressurized-water-reactor steam generator as a test bed and source of specimens for research. An important preparatory step to primary side research activities was reduction of the radiation field in the steam generator channel head. This task report describes the channel head decontamination activities. Though not a programmatic research objective it was judged beneficial to explore the use of dilute reagent chemical decontamination techniques. These techniques presented potential for reduced personnel exposure and reduced secondary radwaste generation, over currently used abrasive blasting techniques. Two techniques with extensive laboratory research and vendors prepared to offer commercial application were tested, one on either side of the channel head. As indicated in the report, both techniques accomplished similar decontamination objectives. Neither technique damaged the generator channel head or tubing materials, as applied. This report provides details of the decontamination operations. Application system and operating conditions are described.

  9. Dose Reduction Techniques

    SciTech Connect (OSTI)

    WAGGONER, L.O.

    2000-05-16

    As radiation safety specialists, one of the things we are required to do is evaluate tools, equipment, materials and work practices and decide whether the use of these products or work practices will reduce radiation dose or risk to the environment. There is a tendency for many workers that work with radioactive material to accomplish radiological work the same way they have always done it rather than look for new technology or change their work practices. New technology is being developed all the time that can make radiological work easier and result in less radiation dose to the worker or reduce the possibility that contamination will be spread to the environment. As we discuss the various tools and techniques that reduce radiation dose, keep in mind that the radiological controls should be reasonable. We can not always get the dose to zero, so we must try to accomplish the work efficiently and cost-effectively. There are times we may have to accept there is only so much you can do. The goal is to do the smart things that protect the worker but do not hinder him while the task is being accomplished. In addition, we should not demand that large amounts of money be spent for equipment that has marginal value in order to save a few millirem. We have broken the handout into sections that should simplify the presentation. Time, distance, shielding, and source reduction are methods used to reduce dose and are covered in Part I on work execution. We then look at operational considerations, radiological design parameters, and discuss the characteristics of personnel who deal with ALARA. This handout should give you an overview of what it takes to have an effective dose reduction program.

  10. March, 2001 Neutron Scattering Group

    E-Print Network [OSTI]

    Johnson, Peter D.

    March, 2001 Neutron Scattering Group A High Performance Hybrid Spectrometer for theA High of the instrument performance · Igor Zaliznyak · Laurence Passell OutlineOutline #12;Neutron Scattering GroupNeutron states in single crystals.single crystals. #12;Neutron Scattering GroupNeutron Scattering Group What

  11. High Temperature Membrane Working Group

    Broader source: Energy.gov [DOE]

    This presentation provides an overview of the High Temperature Membrane Working Group Meeting in May 2007.

  12. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 1999 prepared by: Data Management Group Joint Program APPENDIX A: DATA REQUESTS ..................................... 11 #12;Data Management Group 1999 Annual Report Page 1 of 14 INTRODUCTION The Data Management Group is a research project located at the Joint

  13. Mechanism of destruction of transport barriers in geophysical jets with Rossby waves

    E-Print Network [OSTI]

    M. Yu. Uleysky; M. V. Budyansky; S. V. Prants

    2012-02-02

    The mechanism of destruction of a central transport barrier in a dynamical model of a geophysical zonal jet current in the ocean or the atmosphere with two propagating Rossby waves is studied. We develop a method for computing a central invariant curve which is an indicator of existence of the barrier. Breakdown of this curve under a variation of the Rossby wave amplitudes and onset of chaotic cross-jet transport happen due to specific resonances producing stochastic layers in the central jet. The main result is that there are resonances breaking the transport barrier at unexpectedly small values of the amplitudes that may have serious impact on mixing and transport in the ocean and the atmosphere. The effect can be found in laboratory experiments with azimuthal jets and Rossby waves in rotating tanks under specific values of the wave numbers that are predicted in the theory.

  14. Winter 2015 Positive Parenting Group

    E-Print Network [OSTI]

    Winter 2015 Positive Parenting Group This is an eight-week parent group series starting Monday, January 12, 2015 Future parent group sessions to be held: January 26 (no group 19th ) February 2, 9 and 23 (no group 16th ) and March 2, 9 and 16 6:00 p.m. to 8:00 p.m. Room 145 of the Clinical Services

  15. Atmospheric Data, Images, and Animations from Lidar Instruments used by the University of Wisconsin Lidar Group

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

    The Space Science and Engineering Center is a research and development center affiliated with the University of Wisconsin-Madison’s Graduate School. Its primary focus is on geophysical research and technology to enhance understanding of the atmosphere of Earth, the other planets in the Solar System, and the cosmos. SSEC develops new observing tools for spacecraft, aircraft, and ground-based platforms, and models atmospheric phenomena. The Center receives, manages and distributes huge amounts of geophysical data and develops software to visualize and manipulate these data for use by researchers and operational meteorologists all over the world.[Taken from About SSEC at http://www.ssec.wisc.edu/overview/] A huge collection of data products, images, and animations comes to the SSEC from the University of Wisconsin Lidar Group. Contents of this collection include: • An archive of thousands of Lidar images acquired before 2004 • Arctic HSRL, MMCR, PAERI, MWR, Radiosonde, and CRAS forecast data Data after May 1, 2004 • MPEG animations and Lidar Multiple Scattering Models

  16. Working Group Report: Sensors

    SciTech Connect (OSTI)

    Artuso, M.; et al.,

    2013-10-18

    Sensors play a key role in detecting both charged particles and photons for all three frontiers in Particle Physics. The signals from an individual sensor that can be used include ionization deposited, phonons created, or light emitted from excitations of the material. The individual sensors are then typically arrayed for detection of individual particles or groups of particles. Mounting of new, ever higher performance experiments, often depend on advances in sensors in a range of performance characteristics. These performance metrics can include position resolution for passing particles, time resolution on particles impacting the sensor, and overall rate capabilities. In addition the feasible detector area and cost frequently provides a limit to what can be built and therefore is often another area where improvements are important. Finally, radiation tolerance is becoming a requirement in a broad array of devices. We present a status report on a broad category of sensors, including challenges for the future and work in progress to solve those challenges.

  17. Geologic, geophysical, and geochemical aspects of site-specific studies of the geopressured-geothermal energy resource of southern Louisiana. Final report

    SciTech Connect (OSTI)

    Pilger, R.H. Jr. (ed.)

    1985-01-01

    The report consists of four sections dealing with progress in evaluating geologic, geochemical, and geophysical aspects of geopressured-geothermal energy resources in Louisiana. Separate abstracts have been prepared for the individual sections. (ACR)

  18. Diagnostic techniques used in AVLIS

    SciTech Connect (OSTI)

    Heestand, G.M.; Beeler, R.G.

    1992-12-01

    This is the second part of a general overview talk on the atomic vapor laser isotope separation (AVLIS) process. In this presentation the authors will discuss the diagnostic techniques used to measure key parameters in their atomic vapor including densities, temperature, velocities charge exchange rates and background ionization levels. Although these techniques have been extensively applied to their uranium program they do have applicability to other systems. Relevant data demonstrating these techniques will be shown.

  19. Profiler Instrumentation Using Metaprogramming Techniques

    E-Print Network [OSTI]

    Gray, Jeffrey G.

    Profiler Instrumentation Using Metaprogramming Techniques Ritu Arora, Yu Sun, Zekai Demirezen, Jeff manipulation) before it enters into the available class pool of an executing application. Javassist [9] (see

  20. Low Temperature Material Bonding Technique

    DOE Patents [OSTI]

    Ramsey, J. Michael (Knoxville, TN); Foote, Robert S. (Oak Ridge, TN)

    2000-10-10

    A method of performing a lower temperature bonding technique to bond together two mating pieces of glass includes applying a sodium silicate aqueous solution between the two pieces.

  1. Low temperature material bonding technique

    DOE Patents [OSTI]

    Ramsey, J. Michael (Knoxville, TN); Foote, Robert S. (Oak Ridge, TN)

    2002-02-12

    A method of performing a lower temperature bonding technique to bond together two mating pieces of glass includes applying a sodium silicate aqueous solution between the two pieces.

  2. Neil 65 Group Picture Neil 65 Group Picture

    E-Print Network [OSTI]

    Mohar, Bojan

    Neil 65 Group Picture Neil 65 Group Picture December 14, 2003 Row 1: Tom Dowling, Nolan Mc Glover, Mike Lohman, Sangil Oum, Blair Dowling http://www.math.ohio-state.edu/~maharry/Neil65/pictures/Neil65GroupPicture.html25.9.2004 18:19:04 #12;

  3. Electromagnetic Interrogation Techniques Damage Detection

    E-Print Network [OSTI]

    Electromagnetic Interrogation Techniques for Damage Detection H. T. Banks and M. L. Joyner Center.P. Winfree Nasa Langley Research Center Hampton, VA Plenary Lecture, Electromagnetic Nondestructive Evaluation 2001 (ENDE 2001), Kobe, Japan, May 18-19, 20001 #12;Electromagnetic Interrogation Techniques

  4. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 2000 prepared by: Data Management Group Joint Program PROCESSING ...................................................2 Text Based Data Retrieval System `drs'.................................2 Internet Browser Data Retrieval System (iDRS).....................3 Complex Data Requests

  5. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    iv Data Management Group Annual Report 2003 City of Hamilton City of Toronto GO Transit Regional of York Toronto Transit Commission The Data Management Group is a research program located ........................................................................................................ 3 Text-based Data Retrieval System `drs

  6. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 2001 prepared by: Data Management Group Joint Program..............................................................................2 Text Based Data Retrieval System `drs' ..........................................................2 Internet Browser Data Retrieval System (iDRS)..............................................3 Complex Data

  7. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 2002 prepared by: Data Management Group Joint Program Based Data Retrieval System `drs' ............................................... 3 Internet Browser Data Retrieval System (iDRS) .................................. 4 Complex Data Requests

  8. Review of Airflow Measurement Techniques Jennifer McWilliams

    E-Print Network [OSTI]

    . This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Building of Buildings Group Environmental Energy Technologies Division Lawrence Berkeley National Laboratory BerkeleyLBNL-49747 Review of Airflow Measurement Techniques Jennifer McWilliams Energy Performance

  9. Sensitivity to parameter and data variations in dimensionality reduction techniques

    E-Print Network [OSTI]

    Verleysen, Michel

    - Machine Learning Group ICTEAM/ELEN - Place du Levant, 3 1348 Louvain-la-Neuve, Belgium 3- Univ. Catholique, Belgium Abstract. Dimensionality reduction techniques aim at representing high- dimensional data of data is available in many different fields, such as medical imaging, process control and text mining

  10. National Report for the International Association of Geodesy of the International Union of Geodesy and Geophysics 2011-2014

    E-Print Network [OSTI]

    Savinykh, V P; Malkin, Z; Pobedinsky, G; Stoliarov, I A; Sermiagin, R; Zotov, L; Gorshkov, V; Shestakov, N; Steblov, G; Dokukin, P; Ustinov, A

    2015-01-01

    In this National Report are given major results of researches conducted by Russian geodesists in 2011-2014 on the topics of the International Association of Geodesy (IAG) of the International Union of Geodesy and Geophysics (IUGG). This report is prepared by the Section of Geodesy of the National Geophysical Committee of Russia. In the report prepared for the XXVI General Assembly of IUGG (Czhech Republic, Prague, 22 June - 2 July 2015), the results of principal researches in geodesy, geodynamics, gravimetry, in the studies of geodetic reference frame creation and development, Earth's shape and gravity field, Earth's rotation, geodetic theory, its application and some other directions are briefly described. For some objective reasons not all results obtained by Russian scientists on the problems of geodesy are included in the report.

  11. Interagency Sustainability Working Group | Department of Energy

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

    Sustainability Working Group Interagency Sustainability Working Group The Interagency Sustainability Working Group (ISWG) is the coordinating body for sustainable federal...

  12. Interagency Sustainability Working Group | Department of Energy

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

    Program Areas Sustainable Buildings & Campuses Interagency Sustainability Working Group Interagency Sustainability Working Group The Interagency Sustainability Working Group...

  13. Water Resources Working Group Report

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Water Resources Working Group Report This report provided content for the Wisconsin Initiative in February 2011. #12;Water Resources Working Group Wisconsin Initiative on Climate Change Impacts October 2010 #12;Water Resources Working Group Members ­ WICCI Tim Asplund (Co-Chair) - Wisconsin Department

  14. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 1997 #12;Data Management Group Annual Report 1997 A co-operative project that is jointly funded by members of the Toronto Area Transportation Planning Data Collection: (416) 978-3941 #12;Data Management Group 1997 Annual Report Table of Contents 1 INTRODUCTION

  15. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 2004 City of Hamilton City of Toronto GO Transit Regional of York Toronto Transit Commission The Data Management Group is a research program located of the funding partners: Ministry of Transportation, Ontario #12;SUMMARY The Data Management Group (DMG

  16. Data Management Group Annual Report

    E-Print Network [OSTI]

    Toronto, University of

    Data Management Group Annual Report 2000 prepared by: Data Management Group Joint Program ...........................................18 #12;i SUMMARY The Data Management Group (DMG), in cooperation with the funding agencies, has. In addition, there were 26 complex requests for data that required a customized computer program. Eight

  17. Institute of Geophysics and Planetary Physics (IGPP), Lawrence Livermore National Laboratory (LLNL): Quinquennial report, November 14-15, 1996

    SciTech Connect (OSTI)

    Tweed, J.

    1996-10-01

    This Quinquennial Review Report of the Lawrence Livermore National Laboratory (LLNL) branch of the Institute for Geophysics and Planetary Physics (IGPP) provides an overview of IGPP-LLNL, its mission, and research highlights of current scientific activities. This report also presents an overview of the University Collaborative Research Program (UCRP), a summary of the UCRP Fiscal Year 1997 proposal process and the project selection list, a funding summary for 1993-1996, seminars presented, and scientific publications. 2 figs., 3 tabs.

  18. An Analysis of Wind Power Development in the Town of Hull, MA_Appendix 4_Geophysical Survey Report

    SciTech Connect (OSTI)

    Adams, Christopher

    2013-06-30

    CR Environmental, Inc. (CR) was contracted by GZA GeoEnvironmental, Inc. (GZA) to perform hydrographic and geophysical surveys of an approximately 3.35 square mile area off the eastern shore of Hull, Massachusetts. Survey components included: • Single-beam bathymetry; • 100-kHz and 500-kHz side scan sonar; • Magnetometry; and • Low to mid-frequency sub-bottom profiling.

  19. Fall 2007 American Geophysical Union Meeting Student Travel Support for Environmental Nanomaterials Session (#B35) (December 10-14, 2007)

    SciTech Connect (OSTI)

    Michael F. Hochella, Jr.

    2007-10-01

    The purpose of award no. DE-FG02-08ER15925 was to fund travel for students to present at the Fall 2007 American Geophysical Meeting. This was done successfully, and five students (Bin Xie, Qiaona Hu, Katie Schreiner, Daria Kibanova, and Frank-Andreas Weber) gave excellent oral and poster presentations at the meeting. Provided are the conference abstracts for their presentations.

  20. 1.5 References Batzle, M. and Wang, Z., 1992, Seismic properties of pore fluids: Geophysics, Vol.

    E-Print Network [OSTI]

    , The volumetric properties of sodium chlo- ride solutions from 0 to 500 o C at pressures up to 2000 bars based, USA, 348 pp. Chen, C.T., Chen, L.S., and Millero, F.J., 1978, Speed of sound in NaCl, MgCl2, Na2SO4-situ conditions on the seismic proper- ties of rocks: Geophysics, Vol. 57, No. 7, p. 894-901. Craft, B.C

  1. A NEW UNDERSTANDING OF THE EUROPA ATMOSPHERE AND LIMITS ON GEOPHYSICAL ACTIVITY

    SciTech Connect (OSTI)

    Shemansky, D. E.; Liu, X.; Yoshii, J.; Yung, Y. L.; Hansen, C. J.; Hendrix, A. R.; Esposito, L. W.

    2014-12-20

    Deep extreme ultraviolet spectrograph exposures of the plasma sheet at the orbit of Europa, obtained in 2001 using the Cassini Ultraviolet Imaging Spectrograph experiment, have been analyzed to determine the state of the gas. The results are in basic agreement with earlier results, in particular with Voyager encounter measurements of electron density and temperature. Mass loading rates and lack of detectable neutrals in the plasma sheet, however, are in conflict with earlier determinations of atmospheric composition and density at Europa. A substantial fraction of the plasma species at the Europa orbit are long-lived sulfur ions originating at Io, with ?25% derived from Europa. During the outward radial diffusion process to the Europa orbit, heat deposition forces a significant rise in plasma electron temperature and latitudinal size accompanied with conversion to higher order ions, a clear indication that mass loading from Europa is very low. Analysis of far ultraviolet spectra from exposures on Europa leads to the conclusion that earlier reported atmospheric measurements have been misinterpreted. The results in the present work are also in conflict with a report that energetic neutral particles imaged by the Cassini ion and neutral camera experiment originate at the Europa orbit. An interpretation of persistent energetic proton pitch angle distributions near the Europa orbit as an effect of a significant population of neutral gas is also in conflict with the results of the present work. The general conclusion drawn here is that Europa is geophysically far less active than inferred in previous research, with mass loading of the plasma sheet ?4.5 × 10{sup 25} atoms s{sup –1} two orders of magnitude below earlier published calculations. Temporal variability in the region joining the Io and Europa orbits, based on the accumulated evidence, is forced by the response of the system to geophysical activity at Io. No evidence for the direct injection of H{sub 2}O into the Europa atmosphere or from Europa into the magnetosphere system, as has been observed at Enceladus in the Saturn system, is obtained in the present investigation.

  2. Shift-modulation invariant spaces on LCA groups

    E-Print Network [OSTI]

    Cabrelli, Carlos

    2011-01-01

    A $(K,\\Lambda)$ shift-modulation invariant space is a subspace of $L^2(G)$, that is invariant by translations along elements in $K$ and modulations by elements in $\\Lambda$. Here $G$ is a locally compact abelian group, and $K$ and $\\Lambda$ are closed subgroups of $G$ and the dual group $\\hat G$, respectively. In this article we provide a characterization of shift-modulation invariant spaces in this general context when $K$ and $\\Lambda$ are uniform lattices. This extends previous results known for $L^2(\\R^d)$. We develop fiberization techniques and suitable range functions adapted to LCA groups needed to provide the desired characterization.

  3. Summary Report of Working Group 1: Laser-Plasma Acceleration

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    by the laser recently has been demonstrated to produce intense beams of electrons at MeV-GeV energies was on control, detailed diagnostics and physics models, and technological tools to work towards the beam needed? (Joint with computational working group) In addition, techniques for controlling electron beam

  4. Telluric and D.C. Resistivity Techniques Applied to the Geophysical Investigation of Basin and Range Geothermal Systems, Part III: The Analysis of Data From Grass Valley, Nevada

    E-Print Network [OSTI]

    Beyer, J.H.

    2010-01-01

    a reasonable interpretation of gravity, seismic and d.c.interpretation of telluric and d.c. resistivity data, In conjunction with gravity, seismic, andseismic refraction/reflection. Only the data which are most pertinent to the interpretation

  5. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 94, NO. A2, PAGES 1533-1536, FEBRUARY 1, 1989 Lidar Technique for Measuring Ionospheric

    E-Print Network [OSTI]

    Goree, John

    - tralatomvelocityvmustexceedI/c,satisfyingr/mVc·'/2= where r/ is an efficiencywhich dependson competing loss mechanisms

  6. Telluric and D.C. Resistivity Techniques Applied to the Geophysical Investigation of Basin and Range Geothermal Systems, Part III: The Analysis of Data From Grass Valley, Nevada

    E-Print Network [OSTI]

    Beyer, J.H.

    2010-01-01

    a reasonable interpretation of gravity, seismic and d.c.interpretation of telluric and d.c. resistivity data, In conjunction with gravity, seismic,seismic refraction/reflection. Only the data which are most pertinent to the interpretation

  7. TEC Working Group Topic Groups Archives Training- Medical Training

    Broader source: Energy.gov [DOE]

    The TEC Training and Medical Training Issues Topic Group was formed to address the training issues for emergency responders in the event of a radioactive material transportation incident.

  8. TEC Working Group Topic Groups Archives | Department of Energy

    Office of Environmental Management (EM)

    the following links: Communicatons Consolidated Grant Topic Group Training - Medical Training Protocols Route Identificaiton Process Mechanics of Funding and Technical Assistance...

  9. TEC Working Group Topic Groups Routing | Department of Energy

    Office of Environmental Management (EM)

    group members will be to provide stakeholder perspectives and input to the Office of Logistics Management (OLM) in the Department of Energy's (DOE) Office of Civilian Radioactive...

  10. A geophysical shock and air blast simulator at the National Ignition Facility

    SciTech Connect (OSTI)

    Fournier, K. B.; Brown, C. G.; May, M. J.; Compton, S.; Walton, O. R.; Shingleton, N.; Kane, J. O.; Holtmeier, G.; Loey, H.; Mirkarimi, P. B.; Dunlop, W. H.; Guyton, R. L.; Huffman, E.

    2014-09-01

    The energy partitioning energy coupling experiments at the National Ignition Facility (NIF) have been designed to measure simultaneously the coupling of energy from a laser-driven target into both ground shock and air blast overpressure to nearby media. The source target for the experiment is positioned at a known height above the ground-surface simulant and is heated by four beams from the NIF. The resulting target energy density and specific energy are equal to those of a low-yield nuclear device. The ground-shock stress waves and atmospheric overpressure waveforms that result in our test system are hydrodynamically scaled analogs of full-scale seismic and air blast phenomena. This report summarizes the development of the platform, the simulations, and calculations that underpin the physics measurements that are being made, and finally the data that were measured. Agreement between the data and simulation of the order of a factor of two to three is seen for air blast quantities such as peak overpressure. Historical underground test data for seismic phenomena measured sensor displacements; we measure the stresses generated in our ground-surrogate medium. We find factors-of-a-few agreement between our measured peak stresses and predictions with modern geophysical computer codes.

  11. Accurately Estimating the State of a Geophysical System with Sparse Observations: Predicting the Weather

    E-Print Network [OSTI]

    Zhe An; Daniel Rey; Henry D. I. Abarbanel

    2014-05-11

    Utilizing the information in observations of a complex system to make accurate predictions through a quantitative model when observations are completed at time $T$, requires an accurate estimate of the full state of the model at time $T$. When the number of measurements $L$ at each observation time within the observation window is larger than a sufficient minimum value $L_s$, the impediments in the estimation procedure are removed. As the number of available observations is typically such that $L \\ll L_s$, additional information from the observations must be presented to the model. We show how, using the time delays of the measurements at each observation time, one can augment the information transferred from the data to the model, removing the impediments to accurate estimation and permitting dependable prediction. We do this in a core geophysical fluid dynamics model, the shallow water equations, at the heart of numerical weather prediction. The method is quite general, however, and can be utilized in the analysis of a broad spectrum of complex systems where measurements are sparse. When the model of the complex system has errors, the method still enables accurate estimation of the state of the model and thus evaluation of the model errors in a manner separated from uncertainties in the data assimilation procedure.

  12. Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland

    E-Print Network [OSTI]

    Kohout, Tomáš; Rasmus, Kai; Leppäranta, Matti; Matero, Ilkka

    2014-01-01

    Non-invasive geophysical prospecting and a thermodynamic model were used to examine the structure, depth and lateral extent of the frozen core of a palsa near Lake Peeraj\\"arvi, in northwest Finland. A simple thermodynamic model verified that the current climatic conditions in the study area allow sustainable palsa development. A ground penetrating radar (GPR) survey of the palsa under both winter and summer conditions revealed its internal structure and the size of its frozen core. GPR imaging in summer detected the upper peat/core boundary, and imaging in winter detected a deep reflector that probably represents the lower core boundary. This indicates that only a combined summer and winter GPR survey completely reveals the lateral and vertical extent of the frozen core of the palsa. The core underlies the active layer at a depth of ~0.6 m and extends to about 4 m depth. Its lateral extent is ~15 m x ~30 m. The presence of the frozen core could also be traced as minima in surface temperature and ground condu...

  13. On The Harmonic Oscillator Group

    E-Print Network [OSTI]

    Raquel M. Lopez; Sergei K. Suslov; Jose M. Vega-Guzman

    2011-12-04

    We discuss the maximum kinematical invariance group of the quantum harmonic oscillator from a view point of the Ermakov-type system. A six parameter family of the square integrable oscillator wave functions, which seems cannot be obtained by the standard separation of variables, is presented as an example. The invariance group of generalized driven harmonic oscillator is shown to be isomorphic to the corresponding Schroedinger group of the free particle.

  14. Highlights of the 2009 SEG summer research workshop on "CO2 Sequestration Geophysics"

    E-Print Network [OSTI]

    Lumley, D.

    2010-01-01

    L. and McPherson, B. , 2008, Microseismic monitoring of CO 2profiling) and passive microseismic, are being used toactivity in passive microseismic techniques to monitor CO 2

  15. Ad Hoc Curriculum Implementation Working Group Ad Hoc Working Group

    E-Print Network [OSTI]

    Brown, Sally

    Ad Hoc Curriculum Implementation Working Group MINUTES Ad Hoc Working Group 4 December 2002 Friedman on her visit next week. ONE CURRICULUM OR TWO? Information presented by Trudeau shows that PSE and other programs cannot be merged into a single curriculum. The Faculty Senate website states

  16. "Accepted for publication in (Journal of Geophysical Research). Copyright (2010) American Geophysical Union. Further reproduction or electronic distribution is not permitted."

    E-Print Network [OSTI]

    Pyrak-Nolte, Laura J.

    2010-01-01

    the differences in the morphology and structure of attached biofilms. These results suggest that combining acoustic imaging and complex conductivity techniques can provide a powerful tool for assessing microbial to mineral particles is a key factor in clogging of sediment pore spaces and fluid flow pathways [Baveye et

  17. Acterra Group | Open Energy Information

    Open Energy Info (EERE)

    Product: Acterra Group provides consulting, project financing, services and support to energy, natural resource, and sustainability companies. Coordinates: 44.671312,...

  18. Filling factors and Braid group

    E-Print Network [OSTI]

    Wellington Cruz

    1998-02-25

    We extract the Braid group structure of a recently derived hierarchy scheme for the filling factors proposed by us which related the Hausdorff dimension, $h$, to statistics, $\

  19. Many-Group Cross-Section Adjustment Techniques for Boiling Water Reactor Adaptive Simulation

    SciTech Connect (OSTI)

    Jessee, Matthew Anderson

    2011-01-01

    Computational capability has been developed to adjust multigroup neutron cross sections, including self-shielding correction factors, to improve the fidelity of boiling water reactor (BWR) core modeling and simulation. The method involves propagating multigroup neutron cross-section uncertainties through various BWR computational models to evaluate uncertainties in key core attributes such as core k{sub eff}, nodal power distributions, thermal margins, and in-core detector readings. Uncertainty-based inverse theory methods are then employed to adjust multigroup cross sections to minimize the disagreement between BWR core modeling predictions and observed (i.e., measured) plant data. For this paper, observed plant data are virtually simulated in the form of perturbed three-dimensional nodal power distributions with the perturbations sized to represent actual discrepancies between predictions and real plant data. The major focus of this work is to efficiently propagate multigroup neutron cross-section uncertainty through BWR lattice physics and core simulator calculations. The data adjustment equations are developed using a subspace approach that exploits the ill-conditioning of the multigroup cross-section covariance matrix to minimize computation and storage burden. Tikhonov regularization is also employed to improve the conditioning of the data adjustment equations. Expressions are also provided for posterior covariance matrices of both the multigroup cross-section and core attributes uncertainties.

  20. Roadmap-Based Techniques for Modeling Group Behaviors in Multi-Agent Systems 

    E-Print Network [OSTI]

    Rodriguez, Samuel Oscar

    2012-07-16

    Simulating large numbers of agents, performing complex behaviors in realistic environments is a difficult problem with applications in robotics, computer graphics and animation. A multi-agent system can be a useful tool ...

  1. Submitted to the Journal of Geophysical Research Pore and throat size distributions measured from synchrotron Xray

    E-Print Network [OSTI]

    New York at Stoney Brook, State University of

    Donald et al., 1986(I) and computa­ tion of the specific genus for a sample of Berea sand­ stone presented of this investigative technique. While the technique of pore casting [Wardlaw, 1976] and Wood's metal porosimetry measurements are ex­ tremely difficult to make on the casts without destruc­ tive polishing

  2. ANNUAL REPORT 1998 PHOTOVOLTAICS GROUP

    E-Print Network [OSTI]

    New South Wales, University of

    ANNUAL REPORT 1998 UNSW PHOTOVOLTAICS GROUP ANNUAL REPORT 1998 UNSW PHOTOVOLTAICS GROUP #12;THE UNIVERSITY OF NEW SOUTH WALES THE PHOTOVOLTAICS SPECIAL RESEARCH CENTRE IS A SPECIAL RESEARCH CENTRE OF THE AUSTRALIAN RESEARCH COUNCIL THE KEY CENTRE FOR PHOTOVOLTAIC ENGINEERING IS A KEY CENTRE OF THE AUSTRALIAN

  3. Neutron Scattering Group February, 2001

    E-Print Network [OSTI]

    Johnson, Peter D.

    Neutron Scattering Group February, 2001 A High Performance Instrument for the Single Crystal Igor Zaliznyak Outline #12;Neutron Scattering Group Neutron spectrometer for studies of the low-energy coherent excitations in single crystals. Common requirements for a single crystal neutron spectrometer

  4. FEATURE ARTICLES Group Decision Making

    E-Print Network [OSTI]

    FEATURE ARTICLES Group Decision Making in Honey Bee Swarms When 10,000 bees go house hunting, how a neighboring colony. A striking example of decision mak- ing by an animal group is the choice of a nesting site paper on house hunting by honey bees. Lindauer was then a postdtx:toral stu- dent at the University

  5. Top Management Group Pay Disparities and Subsequent Firm Performance: The Effect of Powerful CEOs

    E-Print Network [OSTI]

    McClelland, Patrick Lyn

    2008-05-21

    (OLS) regression and structured equation modeling (SEM) techniques. Results indicate that CEO power plays an important role in the distribution of compensation within top management groups and the extent to which pay is disparate. Further, results show...

  6. Special Issue on geophysics applied to detection and discrimination of unexploded ordnance

    SciTech Connect (OSTI)

    Gasperikova, Erika; Gasperikova, Erika; Beard, Les P.

    2007-01-15

    Unexploded ordnance (UXO) presents serious problems in Europe, Asia, as well as in the United States. Explosives and mines from World War I and World War II still turn up at European and Asian construction sites, backyard gardens, beaches, wildlife preserves and former military training grounds. The high rate of failure among munitions from 60-90 years ago is cited as one of the main reasons for such a high level of contamination. Apart from war activities, military training has resulted in many uncovered ordnance. It is especially true in the United States, where most UXO has resulted from decades of military training, exercises, and testing of weapons systems. Such UXO contamination prevents civilian land use, threatens public safety, and causes significant environmental concern. In light of this problem, there has been considerable interest shown by federal, state, and local authorities in UXO remediation at former U.S. Department of Defense sites. The ultimate goal of UXO remediation is to permit safe public use of contaminated lands. A Defense Science Board Task Force Report from 1998 lists some 1,500 sites, comprising approximately 15 million acres, that potentially contain UXO. The UXO-related activity for these sites consists of identifying the subareas that actually contain UXO, and then locating and removing the UXO, or fencing the hazardous areas off from the public. The criteria for clearance depend on the intended land end-use and residual hazard risk that is deemed acceptable. Success in detecting UXO depends on the ordnance's size, metal content, and depth of burial, as well as on the ability of geophysical systems to detect ordnance in the presence of metallic fragments from exploded UXO and other metal clutter.

  7. QA-Pagelet: Data Preparation Techniques for Large Scale Data Analysis of the Deep Web

    E-Print Network [OSTI]

    Liu, Ling

    1 QA-Pagelet: Data Preparation Techniques for Large Scale Data Analysis of the Deep Web James data preparation technique for large scale data analysis of the Deep Web. To support QA the Deep Web. Two unique features of the Thor framework are (1) the novel page clustering for grouping

  8. Revealing the Impact of Climate Variability on the Wind Resource Using Data Mining Techniques (Poster)

    SciTech Connect (OSTI)

    Clifton, A.; Lundquist, J.

    2011-12-01

    A data mining technique called 'k-means clustering' can be used to group winds at the NWTC into 4 major clusters. The frequency of some winds in the clusters is correlated with regional pressure gradients and climate indices. The technique could also be applied to wind resource assessment and selecting scenarios for flow modeling.

  9. Electromagnetic Interrogation Techniques Damage Detection

    E-Print Network [OSTI]

    Electromagnetic Interrogation Techniques for Damage Detection H. T. Banks #3; and M. L. Joyner Wincheski and W.P. Winfree Nasa Langley Research Center Hampton, VA #3; Plenary Lecture, Electromagnetic Nondestructive Evaluation 2001 (ENDE 2001), Kobe, Japan, May 18­19, 20001 #12; Electromagnetic Interrogation

  10. Inorganic Materials and Assembly Techniques

    E-Print Network [OSTI]

    Rogers, John A.

    a transformational set of capabilities for high performance flexible/stretchable electronics. KEYWORDS | Bio-integrated electronics; flexible electronics; inorganic materials; integrated systems; stretchable electron- icsINVITED P A P E R Inorganic Materials and Assembly Techniques for Flexible and Stretchable

  11. Federal Utility Partnership Working Group Meeting: Washington...

    Energy Savers [EERE]

    Utility Partnership Working Group Meeting: Washington Update Federal Utility Partnership Working Group Meeting: Washington Update Federal Utility Partnership Working Group Meeting:...

  12. GIS Regional Spatial Data from the Great Basin Center for Geothermal Energy: Geochemical, Geodesic, Geologic, Geophysical, Geothermal, and Groundwater Data

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

    The Great Basin Center for Geothermal Energy, part of the University of Nevada, Reno, conducts research towards the establishment of geothermal energy as an economically viable energy source within the Great Basin. The Center specializes in collecting and synthesizing geologic, geochemical, geodetic, geophysical, and tectonic data, and using Geographic Information System (GIS) technology to view and analyze this data and to produce favorability maps of geothermal potential. The center also makes its collections of spatial data available for direct download to the public. Data are in Lambert Conformable Conic Projection.

  13. Groups

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA Jump to:ofEniaElectricHydroLegal DocumentsGroton Deptgroups/all/feed

  14. Midwest Hydro Users Group Meeting

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Midwest Hydro Users Group will be holding their annual Fall meeting on November 12th and 13th in Wausau, Wisconsin.  An Owners-only meeting on the afternoon of the 12th followed by a full...

  15. Galois Groups of Schubert Problems 

    E-Print Network [OSTI]

    Martin Del Campo Sanchez, Abraham

    2012-10-19

    The Galois group of a Schubert problem is a subtle invariant that encodes intrinsic structure of its set of solutions. These geometric invariants are difficult to determine in general. However, based on a special position argument due to Schubert...

  16. LLNL Chemical Kinetics Modeling Group

    SciTech Connect (OSTI)

    Pitz, W J; Westbrook, C K; Mehl, M; Herbinet, O; Curran, H J; Silke, E J

    2008-09-24

    The LLNL chemical kinetics modeling group has been responsible for much progress in the development of chemical kinetic models for practical fuels. The group began its work in the early 1970s, developing chemical kinetic models for methane, ethane, ethanol and halogenated inhibitors. Most recently, it has been developing chemical kinetic models for large n-alkanes, cycloalkanes, hexenes, and large methyl esters. These component models are needed to represent gasoline, diesel, jet, and oil-sand-derived fuels.

  17. Geophysical Research Abstracts Vol. 16, EGU2014-14313-1, 2014

    E-Print Network [OSTI]

    Forray, Ferenc

    radiocarbon activity acquired from atmospheric radiocarbon bomb pulse. The core was sampled at 2 cm ± 2 mm a Picarro G2121-i 13 C analyzer (Combustion Module coupled with a Cavity Ring Down Spectroscopy technique

  18. Geophysical Monitoring of Multiple Phase Saturation of Rocks: Application to CO[subscript 2] Sequestration

    E-Print Network [OSTI]

    Brown, Stephen

    2011-01-01

    4-D seismic techniques rely on measuring changes in velocity over time in order to detect changes during activities such as CO[subscript 2] flooding and storage in a reservoir. Wang et al. [1998] detail a laboratory study ...

  19. Positioning in geophysics : applications to GPS seismology, airborne gravimetry, and the Dawn Spacecraft at Vesta

    E-Print Network [OSTI]

    Centinello, Frank Joseph, III

    2015-01-01

    This dissertation presents improvements made on position estimation techniques applied to seismology, airborne gravimetry and planetary gravity recovery. In Chapters 2 and 3, a smoothed ionospheric model computed using GPS ...

  20. XXVI General Assembly of European Geophysical Society Nice, France, 26 -30 March 2001

    E-Print Network [OSTI]

    Neumaier, Arnold

    of the presentation · Water resources engineering and global optimization · The nonlinear unconstrained optimization problem · An overview of nonlinear optimization techniques ! The downhill simplex method ! Genetic systems. · Power generators (hydroelectric stations) or consummators (pumps). Mathematical model inputs

  1. Innovative Exploration Techniques for Geothermal Assessment at...

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

    Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico Innovative Exploration Techniques for Geothermal Assessment at Jemez Pueblo, New Mexico Innovative Exploration...

  2. Quantum Techniques for Reaction Networks

    E-Print Network [OSTI]

    John C. Baez

    2013-06-14

    Reaction networks are a general formalism for describing collections of classical entities interacting in a random way. While reaction networks are mainly studied by chemists, they are equivalent to Petri nets, which are used for similar purposes in computer science and biology. As noted by Doi and others, techniques from quantum field theory can be adapted to apply to such systems. Here we use these techniques to study how the "master equation" describing stochastic time evolution for a reaction network reduces is related to the "rate equation" describing the deterministic evolution of the expected number of particles of each species in the large-number limit. We show that the relation is especially strong when a solution of master equation is a "coherent state", meaning that the numbers of entities of each kind are described by independent Poisson distributions.

  3. Data mining and visualization techniques

    DOE Patents [OSTI]

    Wong, Pak Chung (Richland, WA); Whitney, Paul (Richland, WA); Thomas, Jim (Richland, WA)

    2004-03-23

    Disclosed are association rule identification and visualization methods, systems, and apparatus. An association rule in data mining is an implication of the form X.fwdarw.Y where X is a set of antecedent items and Y is the consequent item. A unique visualization technique that provides multiple antecedent, consequent, confidence, and support information is disclosed to facilitate better presentation of large quantities of complex association rules.

  4. 8 Department of Geology and Geophysics University of Wisconsin-Madison Alumni News 2008

    E-Print Network [OSTI]

    Johnson, Clark M.

    , a small group of Esso/Exxon geologists, who in the 1950s-60s investigated raw frontier areas all around in oil and gas busi- ness in Texas, Oklahoma, and Kansas, which I started on my retirement from Mobil

  5. SECURITY TECHNIQUES Chris J Mitchell1

    E-Print Network [OSTI]

    Mitchell, Chris

    SECURITY TECHNIQUES Chris J Mitchell1 Introduction In this paper we consider the range of security security has been exerted. However, the techniques described are of general applicability by a security technique; in doing so we will distinguish between security features and security techniques (or

  6. Galaxy Groups at Intermediate Redshift

    E-Print Network [OSTI]

    R. G. Carlberg; H. K. C. Yee; S. L. Morris; H. Lin; P. B. Hall; D. R. Patton; M. Sawicki; C. W. Shepherd

    2000-08-14

    Galaxy groups likely to be virialized are identified within the CNOC2 intermediate redshift galaxy survey using an iterative method. The number-velocity dispersion relation is in agreement with the low-mass extrapolation of the cluster normalized Press-Schechter function. The two-point group-group correlation function has r_0=6.8+/- 0.3 Mpc, which is larger than the correlations of individual galaxies at the level predicted from n-body calibrated halo clustering. The groups are stacked in velocity and position to create a sample large enough for measurement of a density and velocity dispersion profile. The stacked mean galaxy density profile falls nearly as a power law with r^{-2.5} and has no well-defined core. The projected velocity dispersion is examined for a variety of samples with different methods and found to be either flat or slowly rising outwards. The combination of a steeper-than-isothermal density profile and the outward rising velocity dispersion implies that the mass-to-light ratio of groups rises with radius. The M/L can be kept nearly constant if the galaxy orbits are nearly circular, although such strong tangential anisotropy is not supported by other evidence. The segregation of mass and light is not dependent on galaxy luminosity but is far more prominent in the red galaxies than the blue. The M/L gradient could arise from orbital ``sloshing'' of the galaxies in the group halos, dynamical friction acting on the galaxies in a background of ``classical'' collisionless dark matter, or, more speculatively, the dark matter may have a true core.

  7. A Study of the forced Van der Pol generalized oscillator with renormalization group method

    E-Print Network [OSTI]

    L. A. Hinvi; A. V. Monwanou; J. B. Chabi Orou

    2013-11-04

    In this paper the equation of forced Van der Pol generalized oscillator is examined with renormalization group method. A brief recall of the renormalization group technique is done. We have applied this method to the equation of forced Van der Pol generalized oscillator to search for its asymptotic solution and its renormalization group equation. The analysis of the numerical simulation graph is done; the method's efficiency is pointed out.

  8. Group theoretical methods in physics

    SciTech Connect (OSTI)

    Zachary, W.W.

    1984-01-01

    This book presents the papers given at a colloquium on group theory. Topics considered at the colloquium included supersymmetric Yang-Mills fields and relations with other nonlinear systems, quantum chaos, a Lie-transformed action principle for classical plasma dynamics, an obstacle to predictability, perturbation theory, simple Lie groups, coherent states, scattering and band structure problems, scattering amplitudes, bosons, charge density wave superconductors, harmonic analysis of boson algebras, the gauge principle, the equivalence principle, supergravity, quantum field theory, quantum gravity, and the Cauchy problem.

  9. Tonon Group | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc JumpHeterInformation PolicyTinna Group JumpTombigbeeTonon Group Jump to:

  10. Repositioning of Covered Stents: The Grip Technique

    SciTech Connect (OSTI)

    Kirby, John Martin; Guo Xiaofeng; Midia, Mehran

    2011-06-15

    Introduction: Retrieval and repositioning of a stent deployed beyond its intended target region may be a difficult technical challenge. Materials and Methods: A balloon-mounted snare technique, a variant of the coaxial loop snare technique, is described. Results: The technique is described for the repositioning of a covered transjugular intrahepatic portosystemic shunt stent and a covered biliary stent. Conclusion: The balloon-mounted snare technique is a useful technique for retrieval of migrated stents.

  11. Techniques for Automated Performance Analysis

    SciTech Connect (OSTI)

    Marcus, Ryan C.

    2014-09-02

    The performance of a particular HPC code depends on a multitude of variables, including compiler selection, optimization flags, OpenMP pool size, file system load, memory usage, MPI configuration, etc. As a result of this complexity, current predictive models have limited applicability, especially at scale. We present a formulation of scientific codes, nodes, and clusters that reduces complex performance analysis to well-known mathematical techniques. Building accurate predictive models and enhancing our understanding of scientific codes at scale is an important step towards exascale computing.

  12. Geochemical Techniques | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainable UrbanKentucky: EnergyGateway EditOpenTechniques Jump to: navigation,

  13. Downhole Techniques | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, Alabama (UtilityInstrumentsArea (DOEDixmont,Missouri:Dow ChemicalDownersTechniques Jump

  14. Seismic Techniques | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EIS Report UrlNM-bRenewableSMUDSectional Model FlumeSeeoTechniques Jump

  15. Proposal for a Planetary Geology and Geophysics Initiative on Lunar Drilling Shaopeng Huang, Dept. Geol. Sciences., University of Michigan, Ann Arbor, MI 48109-1005

    E-Print Network [OSTI]

    Huang, Shaopeng

    Proposal for a Planetary Geology and Geophysics Initiative on Lunar Drilling Shaopeng Huang, Dept and technology. As the Moon is the cornerstone for deep space exploration, lunar drilling will become technologies for lunar drilling is lagging behind deep space exploration strategy and planning. Compelling

  16. GEOPHYSICS, VOL. 66, NO. 3 (MAY-JUNE 2001); P. 897903, 4 FIGS., 1 TABLE. Depth-domain velocity analysis in VTI media using surface

    E-Print Network [OSTI]

    Tsvankin, Ilya

    velocity models needed for depth migration. Here, we demonstrate that P-wave reflection data can for depth imaging (such as prestack depth migration) arises mostly in laterally heteroge- neous media. StillGEOPHYSICS, VOL. 66, NO. 3 (MAY-JUNE 2001); P. 897­903, 4 FIGS., 1 TABLE. Depth-domain velocity

  17. GEOPHYSICS, VOL. 61, NO. 3 (MAY-JUNE 1996), P. 835-845, 6 FIGS. Fowler DMO and time migration for transversely

    E-Print Network [OSTI]

    Tsvankin, Ilya

    for final imag- ing. More elaborate depth-migration methods usually are required to obtain accurate depthGEOPHYSICS, VOL. 61, NO. 3 (MAY-JUNE 1996), P. 835-845, 6 FIGS. Fowler DMO and time migration velocities. These sections can then be migrated using Stolt's F-K poststack migration oper- ator

  18. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, The 2011 Mw 7.1 Van (Eastern Turkey) Earthquake -1

    E-Print Network [OSTI]

    Cambridge, University of

    JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, The 2011 Mw 7.1 Van (Eastern Turkey, 2012, 5:45pm D R A F T #12;X - 2 ELLIOTT ET AL.: 2011 VAN EARTHQUAKE, EASTERN TURKEY moment and source.: 2011 VAN EARTHQUAKE, EASTERN TURKEY X - 3 Interferograms from the ENVISAT satellite were derived from

  19. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Refinements to flare energy estimates -a follow-up to "Energy

    E-Print Network [OSTI]

    California at Berkeley, University of

    to arrive at an overall energy budget for the event. The best estimates for the energies of the variousJOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, Refinements to flare energy estimates - a follow-up to "Energy Partition in Two Solar Flare/CME Events" A. G. Emslie, 1 B. R. Dennis 2

  20. GEOPHYSICAL RESEARCH LETTERS, VOL. 40, 16, doi:10.1002/grl.50640, 2013 The role of the geothermal heat flux in driving the abyssal

    E-Print Network [OSTI]

    Ferrari, Raffaele

    GEOPHYSICAL RESEARCH LETTERS, VOL. 40, 1­6, doi:10.1002/grl.50640, 2013 The role of the geothermal in this paper demonstrate that the geothermal heat flux (GHF) from the solid Earth into the ocean plays a non of diapycnal diffusivity. We show that ignor- ing this vertical variation leads to an under