Sample records for tomography rock density

  1. Rock Density | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-f < RAPID‎ |Rippey Jump to: navigation, searchRobbinsDensity At

  2. Gravimeter yields rock density for cavern during operations

    SciTech Connect (OSTI)

    Folle, S.; Rolfs, O. [Kavernen Bau- and Betriebs-GmbH, Hannover (Germany)

    1996-01-22T23:59:59.000Z

    Designing underground cavities and especially planning for caverns in salt formations for storage require investigations of several questions that are posed in this paper. A downhole gravimeter can determine rock density in a natural gas storage cavern while it is in operation or still being solution mined. Operating conditions or solution mining in progress precludes use of a standard density tool during conventional well-logging procedures. Rock density is one of the principal input parameters for rock mechanical investigations in specifying optimum pressure levels in storage caverns. The advantages and disadvantages of the system, as well as of the technical logging procedures, follow. The gravimeter tool: measures rock densities up to approximately 20 m into the formation; logs through casing (independent of a drilling rig); is unaffected by drilling mud; is unaffected by size and variation of caliber. But it also: does not measure continuously; makes logging time-consuming and requires a certain mobilization time; delivers data whose accuracy depends o the homogeneity of the formation or level of information available on the structure in question.

  3. Study on creating hydraulic tomography for crystalline rock using frequency dependent elastic wave velocity

    SciTech Connect (OSTI)

    Yoshimura, K.; Sakashita, S. [Radioactive Waste Management Funding and Research Center, Tokyo (Japan); Ando, K.; Bruines, P. [Civil Engineering Technical Division, Obayashi Corporation, Tokyo (Japan); Blechschmidt, I. [National Cooperative for the Disposal of Radioactive Waste, Wettingen (Switzerland); Kickmaier, W. [University of Applied Sciences, Northern Switzerland, Brugg (Switzerland); Onishi, Y.; Nishiyama, S. [Graduate School of Engineering, Kyoto University, Kyoto (Japan)

    2007-07-01T23:59:59.000Z

    The objective of this study is to establish a technique to obtain hydraulic conductivity distribution in granite rock masses using seismic tomography. We apply the characteristic that elastic wave velocity disperses in fully saturated porous media on frequency and this velocity dispersion is governed by the hydraulic conductivity - this characteristic has been confirmed in laboratory experiments. The feasibility and design of the field experiment was demonstrated in a first step with numerical simulations. In a second step we applied the technique to the fractured granite at the Grimsel Test Site in Switzerland. The emphasis of the field campaign was on the evaluation of the range of applicability of this technique. The field campaign was structured in three steps, each one corresponding to a larger spatial scale. First, the seismic tomography was applied to a small area - the two boreholes were located at a distance of 1.5 m. In the following step, we selected a larger area, in which the distance of the boreholes amounts to 10 m and the field corresponds to a more complex geology. Finally we applied the testing to a field where the borehole distance was of the order of 75 m. We also drilled a borehole to confirm hydraulic characteristic and reviewed hydraulic model in the 1.5 m cross-hole location area. The results from the field campaign are presented and their application to the various fields are discussed and evaluated. (authors)

  4. Rock Density At Alum Area (DOE GTP) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-f < RAPID‎ |Rippey Jump to: navigation, searchRobbinsDensity At Alum

  5. A rapid method for converting medical Computed Tomography scanner topogram attenuation scale to Hounsfield Unit scale and to obtain relative density values

    E-Print Network [OSTI]

    Long, Bernard

    A rapid method for converting medical Computed Tomography scanner topogram attenuation scale online 17 July 2008 Keywords: Computed Tomography Attenuation Density calibration Minerals Medical Computed Tomography scanners permit to rapidly obtain qualitative and quantitative information on objects

  6. Detection of screw threads in computed tomography 3D density fields

    E-Print Network [OSTI]

    Kosarevsky, Sergey

    2013-01-01T23:59:59.000Z

    In this paper, a new method is proposed to automatically detect screw threads in 3D density fields obtained from computed tomography measurement devices. The described method can be used to automate many operations during screw thread inspection process and drastically reduce operator's influence on the measurement process resulting in lower measurement times and increased repeatability.

  7. Rocks

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Scienceand Requirements RecentlyElectronicResources ResourcesRobust, High-ThroughputRocks Rocks

  8. Characterization of rock for constraining reservoir scale tomography at the Geysers geothermal field

    SciTech Connect (OSTI)

    Boitnott, G.N.; Bonner, B.P.

    1994-01-20T23:59:59.000Z

    A suite of laboratory measurements are being conducted on Geysers graywacke recovered from a drilled depth of 2599 meters in NEGU-17. The tests are being conducted to characterize the effect of pressure and fluid saturation on the seismic properties of the graywacke matrix. The measurements indicate that the graywacke is an unusual rock in many respects. Both compressional and shear velocities exhibit relatively little change with pressure. Water saturation causes a slight increase in the compressional velocity, quantitatively consistent with predictions from the Biot-Gassmann equations. Shear velocity decreases with water saturation by an amount greater than that predicted by the Biot-Gassmann equations. This decrease is attributed to chemomechanical weakening caused by the presence of water. Measurements of Q, from torsion experiments on room dry samples at seismic frequencies indicate unusually high Q, (~500). Water saturation decreases the shear modulus by 12 percent, again indicative of chemomechanical weakening. Q, is lower for the water saturated condition, but still relatively high for rock at low stress. Results of ultrasonic pulse propagation experiments on partially saturated samples are typical of low porosity rocks, being characterized by a monotonic decrease in compressional and shear velocity with decrease in saturation. An increase in shear velocity and low frequency shear modulus after vacuum drying indicates the presence of chemo-mechanical weakening resulting from the presence of small amounts of water.

  9. Hydraulic conductivity imaging from 3-D transient hydraulic tomography at several pumping/observation densities

    E-Print Network [OSTI]

    Barrash, Warren

    Hydraulic conductivity imaging from 3-D transient hydraulic tomography at several pumping August 2013; accepted 7 September 2013; published 13 November 2013. [1] 3-D Hydraulic tomography (3-D HT (primarily hydraulic conductivity, K) is estimated by joint inversion of head change data from multiple

  10. Automated simulation of areal bone mineral density assessment in the distal radius from high-resolution peripheral quantitative computed tomography

    E-Print Network [OSTI]

    Burghardt, A. J.; Kazakia, G. J.; Link, T. M.; Majumdar, S.

    2009-01-01T23:59:59.000Z

    quantitative computed tomography A. J. Burghardt & G. J.20172024 Micro-computed tomography has become an importantperipheral quantitative computed tomography (HR-pQCT) is a

  11. THE RELATIONSHIP BETWEEN CRUSTAL DENSITY AND VOLCANIC ROCKS IN THE WESTERN UNITED STATES

    E-Print Network [OSTI]

    Garinger, Linda Pickett

    2008-06-19T23:59:59.000Z

    in wavelength and will not greatly impact gravity modeling. A new idea for preparing an isostatic correction is introduced in preliminary form. Models of crustal density contrasts were prepared for three study areas in California and Nevada through the use...

  12. Pseudolocal tomography

    DOE Patents [OSTI]

    Katsevich, Alexander J. (Los Alamos, NM); Ramm, Alexander G. (Manhattan, KS)

    1996-01-01T23:59:59.000Z

    Local tomographic data is used to determine the location and value of a discontinuity between a first internal density of an object and a second density of a region within the object. A beam of radiation is directed in a predetermined pattern through the region of the object containing the discontinuity. Relative attenuation data of the beam is determined within the predetermined pattern having a first data component that includes attenuation data through the region. The relative attenuation data is input to a pseudo-local tomography function, where the difference between the internal density and the pseudo-local tomography function is computed across the discontinuity. The pseudo-local tomography function outputs the location of the discontinuity and the difference in density between the first density and the second density.

  13. Pseudolocal tomography

    DOE Patents [OSTI]

    Katsevich, A.J.; Ramm, A.G.

    1996-07-23T23:59:59.000Z

    Local tomographic data is used to determine the location and value of a discontinuity between a first internal density of an object and a second density of a region within the object. A beam of radiation is directed in a predetermined pattern through the region of the object containing the discontinuity. Relative attenuation data of the beam is determined within the predetermined pattern having a first data component that includes attenuation data through the region. The relative attenuation data is input to a pseudo-local tomography function, where the difference between the internal density and the pseudo-local tomography function is computed across the discontinuity. The pseudo-local tomography function outputs the location of the discontinuity and the difference in density between the first density and the second density. 7 figs.

  14. Effective porosity and density of carbonate rocks (Maynardville Limestone and Copper Ridge Dolomite) within Bear Creek Valley on the Oak Ridge Reservation based on modern petrophysical techniques

    SciTech Connect (OSTI)

    Dorsch, J.

    1997-02-01T23:59:59.000Z

    The purpose of this study is to provide quantitative data on effective porosity of carbonate rock from the Maynardville Limestone and Copper Ridge Dolomite within Bear Creek Valley based on modern petrophysical techniques. The data will be useful for groundwater-flow and contaminant-flow modeling in the vicinity of the Y-12 Plant on the Oak Ridge Reservation (ORR). Furthermore, the data provides needed information on the amount of interconnected pore space potentially available for operation of matrix diffusion as a transport process within the fractured carbonate rock. A second aspect of this study is to compare effective porosity data based on modern petrophysical techniques to effective porosity data determined earlier by Goldstrand et al. (1995) with a different technique. An added bonus of the study is quantitative data on the bulk density and grain density of dolostone and limestone of the Maynardville Limestone and Copper Ridge Dolomite which might find use for geophysical modeling on the ORR.

  15. Automated simulation of areal bone mineral density assessment in the distal radius from high-resolution peripheral quantitative computed tomography

    E-Print Network [OSTI]

    Burghardt, A. J.; Kazakia, G. J.; Link, T. M.; Majumdar, S.

    2009-01-01T23:59:59.000Z

    Bone mineral density . DXA . HR-pQCT . Osteoporosis .Simulation Introduction Osteoporosis is a conditionclinical assessment of osteoporosis status were identified

  16. Characterizing Low-Permeable Granitic Rock From Micrometer to Centimeter Scale: X-ray Micro-computed Tomography, Confocal Laser Scanning Microscopy and {sup 14}C-PMMA Method

    SciTech Connect (OSTI)

    Laehdemaeki, T.; Kelokaski, M.; Siitari-Kauppi, M. [Laboratory of Radiochemistry, University of Helsinki, P.O.Box 55, University of Helsinki, FIN- 00014 (Finland); Voutilainen, M.; Myllys, M.; Turpeinen, T.; Timonen, J. [Department of Physics, University of Jyvaeskylae, P.O.Box 35, Jyvaeskylae, FIN-40351 (Finland); Mateos, F.; Montoto, M. [Department of Geology, University of Oviedo, Oviedo, 33005 (Spain)

    2007-07-01T23:59:59.000Z

    First results of combining X-ray micro-computed tomography ({mu}CT), confocal laser-scanning microscopy (CLSM) and {sup 14}C-poly-methyl-methacrylate ({sup 14}C-PMMA) impregnation techniques in the study of granitic rock samples are reported. Combining results of {mu}CT and CLSM with those of the {sup 14}C-PMMA technique, the mineral-specific porosity and morphology of the open pore space, as well as its connectivity, could be analyzed from a micrometer up to a decimeter scale. Three different types of granite were studied. In two cases part of the micro-fissure and pore apertures were found to be in a micrometer scale, but in one case all grain-boundary openings were below the detection limit. Micrometer-scale apertures could be analyzed by CLSM and {mu}CT. The benefit of {mu}CT is that it can also provide the heterogeneous distribution of minerals in 3D. The 2D porosity distributions in the mineral phases, consisting of nanometer-scale pores, could be measured by the {sup 14}C-PMMA method together with the micro-fissures. This method does not, however, give the exact pore apertures. The limitations and applicability of the methods are discussed. (authors)

  17. A Comprehensive Study of Fracture Patterns and Densities in The Geysers Geothermal Reservoir Using Microearthquake Shear-Wave Splitting Tomography

    SciTech Connect (OSTI)

    Peter E. Malin; Eylon Shalev; Min Lou; Silas M. Simiyu; Anastasia Stroujkova; Windy McCausland

    2004-02-24T23:59:59.000Z

    In this project we developed a method for using seismic S-wave data to map the patterns and densities of sub-surface fractures in the NW Geysers Geothermal Field/ (1) This project adds to both the general methods needed to characterize the geothermal production fractures that supply steam for power generation and to the specific knowledge of these in the Geysers area. (2)By locating zones of high fracture density it will be possible to reduce the cost of geothermal power development with the targeting of high production geothermal wells. (3) The results of the project having been transferred to both US based and international geothermal research and exploration agencies and concerns by several published papers and meeting presentations, and through the distribution of the data handling and other software codes we developed.

  18. Rock Art

    E-Print Network [OSTI]

    Huyge, Dirk

    2009-01-01T23:59:59.000Z

    The archaeology of early Egypt: Social transformations inAlexander 1938 Rock-drawings of southern Upper Egypt. Vol.1. London: The Egypt Exploration Society. 1939 Rock-drawings

  19. A comparative simulation study of coupled THM processes and their effect on fractured rock permeability around nuclear waste repositories

    E-Print Network [OSTI]

    Rutqvist, Jonny

    2008-01-01T23:59:59.000Z

    European countries. The initial rock properties for the twoinduced changes in rock properties. The purpose of the model3. Some basic THM rock properties Parameter Bulk Density, [

  20. Q00906010024 rock check dam

    E-Print Network [OSTI]

    00906010024 rock check dam Q00906010025 rock check dam Q00906010021 rock check dam Q00906010022 rock check dam Q00906010027 rock check dam Q00906010026 rock check dam Q00906010018 rock check dam Q00906010023 rock check dam Q00906010011 rock check dam Q00906010008 rock check dam Q00906010007 rock check dam Q

  1. Enhanced local tomography

    DOE Patents [OSTI]

    Katsevich, Alexander J. (Los Alamos, NM); Ramm, Alexander G. (Manhattan, KS)

    1996-01-01T23:59:59.000Z

    Local tomography is enhanced to determine the location and value of a discontinuity between a first internal density of an object and a second density of a region within the object. A beam of radiation is directed in a predetermined pattern through the region of the object containing the discontinuity. Relative attenuation data of the beam is determined within the predetermined pattern having a first data component that includes attenuation data through the region. In a first method for evaluating the value of the discontinuity, the relative attenuation data is inputted to a local tomography function .function..sub..LAMBDA. to define the location S of the density discontinuity. The asymptotic behavior of .function..sub..LAMBDA. is determined in a neighborhood of S, and the value for the discontinuity is estimated from the asymptotic behavior of .function..sub..LAMBDA.. In a second method for evaluating the value of the discontinuity, a gradient value for a mollified local tomography function .gradient..function..sub..LAMBDA..epsilon. (x.sub.ij) is determined along the discontinuity; and the value of the jump of the density across the discontinuity curve (or surface) S is estimated from the gradient values.

  2. Doppler Tomography

    E-Print Network [OSTI]

    T. R. Marsh

    2000-11-01T23:59:59.000Z

    I review the method of Doppler tomography which translates binary-star line profiles taken at a series of orbital phases into a distribution of emission over the binary. I begin with a discussion of the basic principles behind Doppler tomography, including a comparison of the relative merits of maximum entropy regularisation versus filtered back-projection for implementing the inversion. Following this I discuss the issue of noise in Doppler images and possible methods for coping with it. Then I move on to look at the results of Doppler Tomography applied to cataclysmic variable stars. Outstanding successes to date are the discovery of two-arm spiral shocks in cataclysmic variable accretion discs and the probing of the stream/magnetospheric interaction in magnetic cataclysmic variable stars. Doppler tomography has also told us much about the stream/disc interaction in non-magnetic systems and the irradiation of the secondary star in all systems. The latter indirectly reveals such effects as shadowing by the accretion disc or stream. I discuss all of these and finish with some musings on possible future directions for the method. At the end I include a tabulation of Doppler maps published in refereed journals.

  3. V00306010057 rock check dam

    E-Print Network [OSTI]

    XY! 16-020 16-030(c) 16-026(l) 16-028(c) 16-026(l) V00306010057 rock check dam V00306010012 rock check dam V00306010040 rock check dam V00306010039 rock check dam V00306010058 rock check dam V00306010064 rock check dam V00306010061 rock check dam V00306010062 rock check dam V00306010063

  4. Rock Properties Model

    SciTech Connect (OSTI)

    C. Lum

    2004-09-16T23:59:59.000Z

    The purpose of this model report is to document the Rock Properties Model version 3.1 with regard to input data, model methods, assumptions, uncertainties and limitations of model results, and qualification status of the model. The report also documents the differences between the current and previous versions and validation of the model. The rock properties model provides mean matrix and lithophysae porosity, and the cross-correlated mean bulk density as direct input to the ''Saturated Zone Flow and Transport Model Abstraction'', MDL-NBS-HS-000021, REV 02 (BSC 2004 [DIRS 170042]). The constraints, caveats, and limitations associated with this model are discussed in Section 6.6 and 8.2. Model validation accomplished by corroboration with data not cited as direct input is discussed in Section 7. The revision of this model report was performed as part of activities being conducted under the ''Technical Work Plan for: The Integrated Site Model, Revision 05'' (BSC 2004 [DIRS 169635]). The purpose of this revision is to bring the report up to current procedural requirements and address the Regulatory Integration Team evaluation comments. The work plan describes the scope, objectives, tasks, methodology, and procedures for this process.

  5. Category:Rock Density | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, click here. Category:ConceptualGeothermal Regulatory Roadmap.source History

  6. Detecting Density Variations and Nanovoids

    SciTech Connect (OSTI)

    Miller, Michael K [ORNL; Longstreth-Spoor, L. [Washington University, St. Louis; Kelton, K. F. [Washington University, St. Louis

    2011-01-01T23:59:59.000Z

    A combination of simulated and experimental data has been used to investigate the size range of nanovoids that can be detected in atom probe tomography data. Simulated atom probe tomography data have revealed that nanovoids as small as 1 nm in diameter can be detected in atom probe tomography data with the use of iso-density surfaces. Iso-density surfaces may be used to quantify the size, morphology and number density of nanovoids and other variations in density in atom probe tomography data. Experimental data from an aluminum-yttrium-iron metallic glass ribbon have revealed the effectiveness of this approach. Combining iso-density surfaces with atom maps also permits the segregation of solute to the nanovoids to be investigated. Field ion microscopy and thin section atom maps have also been used to detect pores and larger voids.

  7. Rock magnetism of remagnetized carbonate rocks: another look

    E-Print Network [OSTI]

    Jackson, M.; Swanson-Hysell, N. L

    2012-01-01T23:59:59.000Z

    and significance of magnetism in sedimentary rocks. Journal1997. Rock Magnetism. zdemir, O Dunlop, D. J. & Oon July 30, 2013 ROCK MAGNETISM: REMAGNETIZED CARBONATES

  8. V01406010015 rock check dam

    E-Print Network [OSTI]

    XY! V01406010015 rock check dam V01406010014 rock check dam V01406010013 rock check dam 1501403010012 earthen berm V01403010008 earthen berm V01406010003 rock check dam V01406010004 rock check dam V01406010010 rock check dam V01406010011 rock check dam 15-0651 15-0307 15-0588 15-0532 15-0575 stormdrain 7160

  9. Computed tomography of cryogenic cells

    E-Print Network [OSTI]

    2001-01-01T23:59:59.000Z

    COMPUTED TOMOGRAPHY OF CRYOGENIC CELLS G. SCHNEIDER, and E.absorption, computed tomography (CT) can be performed. Sincethis work is to apply computed tomography, which has already

  10. T00406010008 rock check dam

    E-Print Network [OSTI]

    XY! T00406010008 rock check dam T00406010009 rock check dam T00406010010 rock check dam T00406010011 rock check dam T-SMA-2.85 0.344 Acres 35-014(g) 35-016(n) T00406010005 rock check dam T00406010006 rock check dam T00403090004 curb T00402040007 established vegetation, green hatch area 7200 7200 7180

  11. Modulated Luminescent Tomography

    E-Print Network [OSTI]

    2015-01-28T23:59:59.000Z

    modalities behave differently than Photoacoustic and Thermoacoustic Tomography, where the ex- citation is highly diffusive but the emitted ultrasound signal...

  12. Mathematics of thermoacoustic tomography

    E-Print Network [OSTI]

    Peter Kuchment; Leonid Kunyansky

    2007-10-21T23:59:59.000Z

    The paper presents a survey of mathematical problems, techniques, and challenges arising in the Thermoacoustic and Photoacoustic Tomography.

  13. J00206010020 rock check dam

    E-Print Network [OSTI]

    XY! J00206010020 rock check dam J00206010023 rock check dam 09-009 09-009 09-009 PJ-SMA-2 0.901 Acres J00206010021 rock check dam J00206010019 rock check dam J00206010014 rock check dam J00203010007 Smith DATE: 14-November-2014 REVISION NUMBER: 8 XY! IP sampler location Berm Channel/swale Check dam

  14. W02106010008 rock check dam

    E-Print Network [OSTI]

    W-SMA-14.1 5.169 Acres W02106010008 rock check dam W02106010009 rock check dam W02106010010 rock check dam W02106010011 rock check dam W02106010012 rock check dam W02103010018 earthen berm W02103010016 dam Established vegetation Seed and mulch Sediment trap/basin Gabion Cap SWMU boundary SMA drainage

  15. Chapter Eight Rock Varnish

    E-Print Network [OSTI]

    Dorn, Ron

    ) Coating Description Carbonate skin Coating composed primarily of carbonate, usually calcium carbonate; the agent may be manganese, sulphate, carbonate, silica, iron, oxalate, organisms, or anthropogenic Dust, cyanobacteria, algae Nitrate crust Potassium and calcium nitrate coatings on rocks, often in caves and rock

  16. Incident at the Rock Pile

    E-Print Network [OSTI]

    Birgfeld, Doug

    2015-01-01T23:59:59.000Z

    At the off limit rock pile At a Portland school Where theDoug. Incident at the Rock Pile http://escholarship.org/Doug. Incident at the Rock Pile http://escholarship.org/

  17. A Comprehensive Study Of Fracture Patterns And Densities In The...

    Open Energy Info (EERE)

    Patterns And Densities In The Geysers Geothermal Reservoir Using Microearthquake Shear-Wave Splitting Tomography Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  18. Turbocharging Quantum Tomography.

    SciTech Connect (OSTI)

    Blume-Kohout, Robin J; Gamble, John King,; Nielsen, Erik; Maunz, Peter Lukas Wilhelm; Scholten, Travis L.; Rudinger, Kenneth Michael

    2015-01-01T23:59:59.000Z

    Quantum tomography is used to characterize quantum operations implemented in quantum information processing (QIP) hardware. Traditionally, state tomography has been used to characterize the quantum state prepared in an initialization procedure, while quantum process tomography is used to characterize dynamical operations on a QIP system. As such, tomography is critical to the development of QIP hardware (since it is necessary both for debugging and validating as-built devices, and its results are used to influence the next generation of devices). But tomography su %7C ers from several critical drawbacks. In this report, we present new research that resolves several of these flaws. We describe a new form of tomography called gate set tomography (GST), which unifies state and process tomography, avoids prior methods critical reliance on precalibrated operations that are not generally available, and can achieve unprecedented accuracies. We report on theory and experimental development of adaptive tomography protocols that achieve far higher fidelity in state reconstruction than non-adaptive methods. Finally, we present a new theoretical and experimental analysis of process tomography on multispin systems, and demonstrate how to more e %7C ectively detect and characterize quantum noise using carefully tailored ensembles of input states.

  19. Electron tomography of defects

    E-Print Network [OSTI]

    Sharp, Joanne

    2010-10-12T23:59:59.000Z

    . . . . . . . . . . . . . . . . . . . 36 2.6 Limitations of electron tomography . . . . . . . . . . . . . . . 37 2.6.1 The missing wedge . . . . . . . . . . . . . . . . . . . . 37 2.6.2 Minimum reliable spacing of features . . . . . . . . . . 39 3 Tomography of dislocations using weak... ELECTRON TOMOGRAPHY OF DEFECTS This dissertation is submitted for the degree of Doctor of Philosophy by Joanne Sharp Of Wolfson College Submitted 26th April 2010 Acknowledgements This dissertation is the result of my own work and includes nothing...

  20. Fourier Transform Quantum State Tomography

    E-Print Network [OSTI]

    Mohammadreza Mohammadi; Agata M. Branczyk; Daniel F. V. James

    2013-01-17T23:59:59.000Z

    We propose a technique for performing quantum state tomography of photonic polarization-encoded multi-qubit states. Our method uses a single rotating wave plate, a polarizing beam splitter and two photon-counting detectors per photon mode. As the wave plate rotates, the photon counters measure a pseudo-continuous signal which is then Fourier transformed. The density matrix of the state is reconstructed using the relationship between the Fourier coefficients of the signal and the Stokes' parameters that represent the state. The experimental complexity, i.e. different wave plate rotation frequencies, scales linearly with the number of qubits.

  1. Neutron computed tomography

    E-Print Network [OSTI]

    Russell, Clifford Marlow

    1992-01-01T23:59:59.000Z

    of tomography was discovered by Radon in 1917. Radon, a mathematician, solved the problem for an n-dimensional function with n-I dimensional projectors as related to gravitational equations. Radon's technique is not the only mathematical basis for tomography...

  2. Dual seven pinhole tomography

    SciTech Connect (OSTI)

    Bizais, Y.; Zubal, I.G.; Rowe, R.W.; Bennett, G.W.; Brill, A.B.

    1982-01-01T23:59:59.000Z

    Emission tomography using two orthogonal sets of projections through seven pinhole collimators is considered. This paper describes the acquisition system, the reconstruction algorithm, presents results obtained in phantom studies, and discusses the advantages and disadvantages of this method over conventional Seven Pinhole Tomography.

  3. The Landscape of Klamath Basin Rock Art

    E-Print Network [OSTI]

    David, Robert James

    2012-01-01T23:59:59.000Z

    the Lines: Ethnographic Sources and Rock Art Interpretationwhen applying these sources toward rock art interpretation.information source for developing rock art interpretations.

  4. Software Engineer RockAuto www.RockAuto.com

    E-Print Network [OSTI]

    Liblit, Ben

    Software Engineer RockAuto www.RockAuto.com Position Description Software is the foundation Familiarity with open-source development technologies like PHP, Perl, JavaScript and C (Linux system Lane, Madison, WI 53719) Why RockAuto? Strategic and tactical impact. We're an e-commerce company

  5. Microwave assisted hard rock cutting

    DOE Patents [OSTI]

    Lindroth, David P. (Apple Valley, MN); Morrell, Roger J. (Bloomington, MN); Blair, James R. (Inver Grove Heights, MN)

    1991-01-01T23:59:59.000Z

    An apparatus for the sequential fracturing and cutting of subsurface volume of hard rock (102) in the strata (101) of a mining environment (100) by subjecting the volume of rock to a beam (25) of microwave energy to fracture the subsurface volume of rock by differential expansion; and , then bringing the cutting edge (52) of a piece of conventional mining machinery (50) into contact with the fractured rock (102).

  6. Using electrical resistance tomography to map subsurface temperatures

    DOE Patents [OSTI]

    Ramirez, Abelardo L. (Pleasanton, CA); Chesnut, Dwayne A. (San Francisco, CA); Daily, William D. (Livermore, CA)

    1994-01-01T23:59:59.000Z

    A method is provided for measuring subsurface soil or rock temperatures remotely using electrical resistivity tomography (ERT). Electrical resistivity measurements are made using electrodes implanted in boreholes driven into the soil and/or at the ground surface. The measurements are repeated as some process changes the temperatures of the soil mass/rock mass. Tomographs of electrical resistivity are calculated based on the measurements using Poisson's equation. Changes in the soil/rock resistivity can be related to changes in soil/rock temperatures when: (1) the electrical conductivity of the fluid trapped in the soil's pore space is low, (2) the soil/rock has a high cation exchange capacity and (3) the temperature changes are sufficiently high. When these three conditions exist the resistivity changes observed in the ERT tomographs can be directly attributed to changes in soil/rock temperatures. This method provides a way of mapping temperature changes in subsurface soils remotely. Distances over which the ERT method can be used to monitor changes in soil temperature range from tens to hundreds of meters from the electrode locations.

  7. Using electrical resistance tomography to map subsurface temperatures

    DOE Patents [OSTI]

    Ramirez, A.L.; Chesnut, D.A.; Daily, W.D.

    1994-09-13T23:59:59.000Z

    A method is provided for measuring subsurface soil or rock temperatures remotely using electrical resistivity tomography (ERT). Electrical resistivity measurements are made using electrodes implanted in boreholes driven into the soil and/or at the ground surface. The measurements are repeated as some process changes the temperatures of the soil mass/rock mass. Tomographs of electrical resistivity are calculated based on the measurements using Poisson's equation. Changes in the soil/rock resistivity can be related to changes in soil/rock temperatures when: (1) the electrical conductivity of the fluid trapped in the soil's pore space is low, (2) the soil/rock has a high cation exchange capacity and (3) the temperature changes are sufficiently high. When these three conditions exist the resistivity changes observed in the ERT tomographs can be directly attributed to changes in soil/rock temperatures. This method provides a way of mapping temperature changes in subsurface soils remotely. Distances over which the ERT method can be used to monitor changes in soil temperature range from tens to hundreds of meters from the electrode locations. 1 fig.

  8. State tomography via weak measurements

    E-Print Network [OSTI]

    Shengjun Wu

    2013-02-01T23:59:59.000Z

    Recent work has revealed that the wave function of a pure state can be measured directly and that complementary knowledge of a quantum system can be obtained simultaneously by weak measurements. However, the original scheme applies only to pure states, and it is not efficient because most of the data are discarded by post-selection. Here, we propose tomography schemes for pure states and for mixed states via weak measurements, and our schemes are more efficient because we do not discard any data. Furthermore, we demonstrate that any matrix element of a general state can be directly read from an appropriate weak measurement. The density matrix (with all of its elements) represents all that is directly accessible from a general measurement.

  9. Thermoacoustic tomography, variable sound speed Plamen Stefanov

    E-Print Network [OSTI]

    Stefanov, Plamen

    Thermoacoustic tomography, variable sound speed Plamen Stefanov Purdue University Based on a joint work with Gunther Uhlmann Plamen Stefanov (Purdue University ) Thermoacoustic tomography, variable sound speed 1 / 18 #12;Formulation Main Problem Thermoacoustic Tomography In thermoacoustic tomography

  10. Drill-back studies examine fractured, heated rock

    SciTech Connect (OSTI)

    Wollenberg, H.A.; Flexser, S.; Myer, L.R.

    1990-01-01T23:59:59.000Z

    To investigate the effects of heating on the mineralogical, geochemical, and mechanical properties of rock by high-level radioactive waste, cores are being examined from holes penetrating locations where electric heaters simulated the presence of a waste canister, and from holes penetration natural hydrothermal systems. Results to date indicate the localized mobility and deposition of uranium in an open fracture in heated granitic rock, the mobility of U in a breccia zone in an active hydrothermal system in tuff, and the presence of U in relatively high concentration in fracture-lining material in tuff. Mechanical -- property studies indicate that differences in compressional- and shear-wave parameters between heated and less heated rock can be attributed to differences in the density of microcracks. Emphasis has shifted from initial studies of granitic rock at Stripa, Sweden to current investigations of welded tuff at the Nevada Test Site. 7 refs., 8 figs.

  11. Rock Bands/Rock Brands: Mediation and Musical Performance in Post-liberalization Bangalore

    E-Print Network [OSTI]

    Coventry, Chloe Louise

    2013-01-01T23:59:59.000Z

    these recorded sources important rock pedagogical tools inwere a primary source of western rock music for young fans,Nevertheless, a source of funding for rock music performance

  12. Using computerized tomography to determine ionospheric structures. Part 1, Notivation and basic approaches

    SciTech Connect (OSTI)

    Vittitoe, C.N.

    1993-08-01T23:59:59.000Z

    Properties of the ionosphere are reviewed along with its correlations with other geophysical phenomena and with applications of ionospheric studies to communication, navigation, and surveillance systems. Computer tomography is identified as a method to determine the detailed, three-dimensional distribution of electron density within the ionosphere. Several tomography methods are described, with a basic approach illustrated by an example. Limitations are identified.

  13. Iron and Steel Phosphate Rock

    E-Print Network [OSTI]

    Torgersen, Christian

    Lime Lithium Magnesium Manganese Mercury Mica Molybdenum Nickel Nitrogen Peat Perlite Phosphate Rock . . . . . . . . . . . . . . . . . . . . . . . . 194 Appendix C--Resource/Reserve Definitions . . . . . . 195 Commodities: Abrasives (Manufactured

  14. Iron and Steel Phosphate Rock

    E-Print Network [OSTI]

    Torgersen, Christian

    Mica Molybdenum Nickel Nitrogen Peat Perlite Phosphate Rock Platinum Potash Pumice Quartz Crystal Rare . . . . . . . . . . . . . . . . . . . . . . . . 190 Appendix C--A Resource/Reserve Classification for Minerals

  15. Regularized Equally Sloped Tomography Algorithm for Low Dose X-Ray Computed Tomography

    E-Print Network [OSTI]

    Zhao, Yunzhe

    2012-01-01T23:59:59.000Z

    based imaging computed tomography extraction algorithms and10 2.2. Computed Tomography reconstruction theory andcontrast X-ray computed tomography for observing biological

  16. Regularized Equally Sloped Tomography Algorithm for Low Dose X-Ray Computed Tomography

    E-Print Network [OSTI]

    Zhao, Yunzhe

    2012-01-01T23:59:59.000Z

    based imaging computed tomography extraction algorithms andcontrast X-ray computed tomography for observing biological10 2.2. Computed Tomography reconstruction theory and

  17. Ionospheric Correction Using Tomography

    E-Print Network [OSTI]

    Stanford University

    re- quirements on the order of ones of meters with safety of life integrity requirements which delay algorithms. The capability of ionospheric tomography is demon- strated by a time series of 3DN 30N 30N 40N 40N 50N 50N 60N 60N Figure 1: The NSTB reference network geometry is comprised

  18. Jet Tomography at RHIC

    E-Print Network [OSTI]

    J. C. Dunlop

    2007-07-10T23:59:59.000Z

    The status of the use of hard probes in heavy ion collisions at RHIC is reviewed. The discovery of strong jet quenching at RHIC is a major success. However, in order to make full use of this new phenomenon for full jet emission tomography of the properties of the collision zone further development is needed, both experimentally and theoretically.

  19. An integrated experimental and numerical study: Developing a reaction transport model that couples chemical reactions of mineral dissolution/precipitation with spatial and temporal flow variations in CO2/brine/rock systems

    Broader source: Energy.gov [DOE]

    Project objectives: Generate and characterize mineral dissolution/precipitation reactions in supercritical CO2/brine/rock systems under pressure-temperature-chemistry conditions resembling CO2injection into EGS. Characterize three-dimensional spatial and temporal distributions of rock structures subject to mineral dissolution/precipitation processes by X-ray tomography, SEM imaging, and Microprobe analysis.

  20. Iron and Steel Phosphate Rock

    E-Print Network [OSTI]

    Torgersen, Christian

    Phosphate Rock Platinum Potash Pumice Quartz Crystal Rare Earths Rhenium Rubidium Salt Sand and Gravel Graphite Peat Sulfur Beryllium Gypsum Perlite Talc Bismuth Hafnium Phosphate Rock Tantalum Boron Helium on the USGS--the Federal source for science about the Earth, its natural and living resources, natural hazards

  1. Oil and Gas CDT Bots in Rocks: Intelligent Rock Deformation for Fault Rock

    E-Print Network [OSTI]

    Henderson, Gideon

    Heriot-Watt University, Institute of Petroleum Engineering Supervisory Team Dr Helen Lewis, Heriot://www.pet.hw.ac.uk/staff-directory/jimsomerville.htm Key Words Nano/Micro sensors; faults; fault zones; geomechanics; rock mechanics; rock deformation-deformed equivalent, a different lab-deformed example and a geomechanical simulation of a fault zone showing permanent

  2. Tomography and spectroscopy as quantum computations

    E-Print Network [OSTI]

    Cesar Miquel; Juan Pablo Paz; Marcos Saraceno; Emmanuel Knill; Raymond Laflamme; Camille Negrevergne

    2001-09-14T23:59:59.000Z

    Determining the state of a system and measuring properties of its evolution are two of the most important tasks a physicist faces. For the first purpose one can use tomography, a method that after subjecting the system to a number of experiments determines all independent elements of the density matrix. For the second task, one can resort to spectroscopy, a set of techniques used to determine the spectrum of eigenvalues of the evolution operator. In this letter, we show that tomography and spectroscopy can be naturally interpreted as dual forms of quantum computation. We show how to adapt the simplest case of the well-known phase estimation quantum algorithm to perform both tasks, giving it a natural interpretation as a simulated scattering experiment. We show how this algorithm can be used to implement an interesting form of tomography by performing a direct measurement of the Wigner function of a quantum system. We present results of such measurements performed on a system of three qubits using liquid state NMR quantum computation techniques in a sample of trichloroethylene. Remarkable analogies with other experiments are discussed.

  3. Shotgun cartridge rock breaker

    DOE Patents [OSTI]

    Ruzzi, Peter L. (Eagan, NM); Morrell, Roger J. (Bloomington, MN)

    1995-01-01T23:59:59.000Z

    A rock breaker uses shotgun cartridges or other firearm ammunition as the explosive charge at the bottom of a drilled borehole. The breaker includes a heavy steel rod or bar, a gun with a firing chamber for the ammunition which screws onto the rod, a long firing pin running through a central passage in the rod, and a firing trigger mechanism at the external end of the bar which strikes the firing pin to fire the cartridge within the borehole. A tubular sleeve surround the main body of the rod and includes slits the end to allow it to expand. The rod has a conical taper at the internal end against which the end of the sleeve expands when the sleeve is forced along the rod toward the taper by a nut threaded onto the external end of the rod. As the sleeve end expands, it pushes against the borehole and holds the explosive gasses within, and also prevents the breaker from flying out of the borehole. The trigger mechanism includes a hammer with a slot and a hole for accepting a drawbar or drawpin which, when pulled by a long cord, allows the cartridge to be fired from a remote location.

  4. Strength of transversely isotropic rocks

    E-Print Network [OSTI]

    Pei, Jianyong, 1975-

    2008-01-01T23:59:59.000Z

    This thesis proposes a new Anisotropic Matsuoka-Nakai (AMN) criterion to characterize the failure of transversely isotropic rocks under true triaxial stress states. One major obstacle in formulating an anisotropic criterion ...

  5. Thermoacoustic tomography with variable sound speed

    E-Print Network [OSTI]

    2009-10-26T23:59:59.000Z

    We study the mathematical model of thermoacoustic tomography in media with a ... In thermoacoustic tomography, a short electro-magnetic pulse is sent through...

  6. Positron Emission Tomography (PET)

    DOE R&D Accomplishments [OSTI]

    Welch, M. J.

    1990-01-00T23:59:59.000Z

    Positron emission tomography (PET) assesses biochemical processes in the living subject, producing images of function rather than form. Using PET, physicians are able to obtain not the anatomical information provided by other medical imaging techniques, but pictures of physiological activity. In metaphoric terms, traditional imaging methods supply a map of the body's roadways, its, anatomy; PET shows the traffic along those paths, its biochemistry. This document discusses the principles of PET, the radiopharmaceuticals in PET, PET research, clinical applications of PET, the cost of PET, training of individuals for PET, the role of the United States Department of Energy in PET, and the futures of PET.

  7. Radial reflection diffraction tomography

    DOE Patents [OSTI]

    Lehman, Sean K.

    2012-12-18T23:59:59.000Z

    A wave-based tomographic imaging method and apparatus based upon one or more rotating radially outward oriented transmitting and receiving elements have been developed for non-destructive evaluation. At successive angular locations at a fixed radius, a predetermined transmitting element can launch a primary field and one or more predetermined receiving elements can collect the backscattered field in a "pitch/catch" operation. A Hilbert space inverse wave (HSIW) algorithm can construct images of the received scattered energy waves using operating modes chosen for a particular application. Applications include, improved intravascular imaging, bore hole tomography, and non-destructive evaluation (NDE) of parts having existing access holes.

  8. Stored Luminescence Computed Tomography

    E-Print Network [OSTI]

    Cong, Wenxiang; Wang, Ge

    2013-01-01T23:59:59.000Z

    The phosphor nanoparticles made of doped semiconductors, pre-excited by well-collimated X-ray radiation, were recently reported for their light emission upon NIR light stimulation. The characteristics of X-ray energy storage and NIR stimulated emission is highly desirable to design targeting probes and improve molecular and cellular imaging. Here we propose stored luminescence computed tomography (SLCT), perform realistic numerical simulation, and demonstrate a much-improved spatial resolution in a preclinical research context. The future opportunities are also discussed along this direction.

  9. Rock physics at Los Alamos Scientific Laboratory

    SciTech Connect (OSTI)

    Not Available

    1980-01-01T23:59:59.000Z

    Rock physics refers to the study of static and dynamic chemical and physical properties of rocks and to phenomenological investigations of rocks reacting to man-made forces such as stress waves and fluid injection. A bibliography of rock physics references written by LASL staff members is given. Listing is by surname of first author. (RWR)

  10. Medical Imaging Computed Tomography (CT)

    E-Print Network [OSTI]

    Massey, Thomas N.

    Module 10 Medical Imaging X-rays Computed Tomography (CT) Positron Emission Tomography (PET Sources PET-TOF #12;Four Sources PET #12;Four Sources PET-TOF #12;PET Scan MRI CT scan #12;Endocrine Gland,000 pixels! #12;Modern Example of CT Scan with the addition of Surface Shading Standard CT With Surface

  11. Inverse diffusion from knowledge of power densities

    E-Print Network [OSTI]

    Bal, Guillaume; Monard, Francois; Triki, Faouzi

    2011-01-01T23:59:59.000Z

    This paper concerns the reconstruction of a diffusion coefficient in an elliptic equation from knowledge of several power densities. The power density is the product of the diffusion coefficient with the square of the modulus of the gradient of the elliptic solution. The derivation of such internal functionals comes from perturbing the medium of interest by acoustic (plane) waves, which results in small changes in the diffusion coefficient. After appropriate asymptotic expansions and (Fourier) transformation, this allow us to construct the power density of the equation point-wise inside the domain. Such a setting finds applications in ultrasound modulated electrical impedance tomography and ultrasound modulated optical tomography. We show that the diffusion coefficient can be uniquely and stably reconstructed from knowledge of a sufficient large number of power densities. Explicit expressions for the reconstruction of the diffusion coefficient are also provided. Such results hold for a large class of boundary...

  12. ACOUSTICAL IMAGING AND MECHANICAL PROPERTIES OF SOFT ROCK AND MARINE SEDIMENTS

    SciTech Connect (OSTI)

    Thurman E. Scott, Jr., Ph.D.; Younane Abousleiman, Ph.D.; Musharraf Zaman, Ph.D., P.E.

    2002-11-18T23:59:59.000Z

    During the sixth quarter of this research project the research team developed a method and the experimental procedures for acquiring the data needed for ultrasonic tomography of rock core samples under triaxial stress conditions as outlined in Task 10. Traditional triaxial compression experiments, where compressional and shear wave velocities are measured, provide little or no information about the internal spatial distribution of mechanical damage within the sample. The velocities measured between platen-to-platen or sensor-to-sensor reflects an averaging of all the velocities occurring along that particular raypath across the boundaries of the rock. The research team is attempting to develop and refine a laboratory equivalent of seismic tomography for use on rock samples deformed under triaxial stress conditions. Seismic tomography, utilized for example in crosswell tomography, allows an imaging of the velocities within a discrete zone within the rock. Ultrasonic or acoustic tomography is essentially the extension of that field technology applied to rock samples deforming in the laboratory at high pressures. This report outlines the technical steps and procedures for developing this technology for use on weak, soft chalk samples. Laboratory tests indicate that the chalk samples exhibit major changes in compressional and shear wave velocities during compaction. Since chalk is the rock type responsible for the severe subsidence and compaction in the North Sea it was selected for the first efforts at tomographic imaging of soft rocks. Field evidence from the North Sea suggests that compaction, which has resulted in over 30 feet of subsidence to date, is heterogeneously distributed within the reservoir. The research team will attempt to image this very process in chalk samples. The initial tomographic studies (Scott et al., 1994a,b; 1998) were accomplished on well cemented, competent rocks such as Berea sandstone. The extension of the technology to weaker samples is more difficult but potentially much more rewarding. The chalk, since it is a weak material, also attenuates wave propagation more than other rock types. Three different types of sensors were considered (and tested) for the tomographic imaging project: 600 KHz PZT, 1 MHz PZT, and PVDF film sensors. 600 KHz PZT crystals were selected because they generated a sufficiently high amplitude pulse to propagate across the damaged chalk. A number of different configurations were considered for placement of the acoustic arrays. It was decided after preliminary testing that the most optimum arrangement of the acoustic sensors was to place three arrays of sensors, with each array containing twenty sensors, around the sample. There would be two horizontal arrays to tomographically image two circular cross-sectional planes through the rock core sample. A third array would be vertically oriented to provide a vertical cross-sectional view of the sample. A total of 260 acoustic raypaths would be shot and acquired in the horizontal acoustic array to create each horizontal tomographic image. The sensors can be used as both acoustic sources or as acoustic each of the 10 pulsers to the 10 receivers.

  13. Connate Water Saturation -Irreducible or Not: the Key to Reliable Hydraulic Rock Typing in Reservoirs Straddling Multiple Capillary Windows

    E-Print Network [OSTI]

    Torres-Verdn, Carlos

    of flow capacity. High in-situ capillary pressure causes connate water saturation in reservoir rocks petrophysical analysis based solely on conventional logs, including gamma ray, neutron porosity, bulk densitySPE 166082 Connate Water Saturation - Irreducible or Not: the Key to Reliable Hydraulic Rock Typing

  14. Ultrasound-modulated optical tomography

    E-Print Network [OSTI]

    Nam, Haewon

    2004-09-30T23:59:59.000Z

    Ultrasound-modulated optical tomography is modeled by a linear integral equation and an inverse problem involving a diffusion equation in n spatial dimensions, n=2, 3. Based on measured data, the optical absorption coefficient ?...

  15. Teleseismic transmission and reflection tomography

    E-Print Network [OSTI]

    Burdick, Scott A. (Scott Anthony)

    2014-01-01T23:59:59.000Z

    The aim of seismic tomography is to determine a model of Earth properties that best explain observed seismic data. In practice, the limitations placed on our observations and computational capabilities force us to make a ...

  16. Mathematical Problems of Thermoacoustic Tomography

    E-Print Network [OSTI]

    Nguyen, Linh V.

    2010-10-12T23:59:59.000Z

    Thermoacoustic tomography (TAT) is a newly emerging modality in biomedical imaging. It combines the good contrast of electromagnetic and good resolution of ultrasound imaging. The mathematical model of TAT is the observability problem for the wave...

  17. Reconstruction of Sedimentary Rock Based on Mechanical Properties

    E-Print Network [OSTI]

    Jin, Guodong; Patzek, Tad W.; Silin, Dmitry B.

    2008-01-01T23:59:59.000Z

    the veri?cation of rock mechanical properties. The dynamicis white. IV. ROCK MECHANICAL PROPERTIES FIG. 9: Cementationextracting meaningful rock transport properties from these

  18. EMISSION AND TRANSMISSION NOISE PROPAGATION IN POSITRON EMISSION COMPUTED TOMOGRAPHY

    E-Print Network [OSTI]

    Gullberg, G.T.

    2010-01-01T23:59:59.000Z

    High Resolution Computed Tomography of Positron Emitters,"of Dynamic Emission Computed Tomography," J. Nucl. Med. ~:IN POSITRON EMISSION COMPUTED TOMOGRAPHY RECEIVED lAWRENCE

  19. SINGLE-PHOTON EMISSION COMPUTED TOMOGRAPHY: COMPENSATION FOR CONSTANT ATTENUATION

    E-Print Network [OSTI]

    Gullberg, Grant T.

    2013-01-01T23:59:59.000Z

    in radionuclide computed tomography," IEEE Trans. Nucl.49. M.E.Phelps, Emission computed tomography,~~ Seminars inSINGLE-PHOTON EMISSION COMPUTED TOMOGRAPHY: COMPENSATION FOR

  20. Artifact Simulating Fracture on Cervical Spine Computed Tomography

    E-Print Network [OSTI]

    Shockley, Lee W.; Kendall, John L.

    2011-01-01T23:59:59.000Z

    on Cervical Spine Computed Tomography Lee W. Shockley, MD,patient with computed tomography concerning significant C3-scalp laceration. Computed tomography (CT) of her head was

  1. Thermal Neutron Computed Tomography of Soil Water and Plant Roots

    E-Print Network [OSTI]

    Leanne G. Tumlinson; Hungyuan Liu; Wendy K. Silk; Jan W. Hopmans

    2007-01-01T23:59:59.000Z

    2000. 3D neutron computed tomography: Requirements and2002. Using x-ray computed tomography in hydrology: Systems,of neutron computed tomography in the geosciences. Nucl.

  2. Application of neutron computed tomography in the geosciences

    E-Print Network [OSTI]

    Wilding, M.; Shields, K.; Lesher, C. E.

    2005-01-01T23:59:59.000Z

    of neutron computed tomography in the geosciences Martinthat applies neutron computed tomography (CT) to geologicalthe use of neutron computed tomography (CT) in the analy-

  3. Hyperdense Cerebral Sinus Vein Thrombosis on Computed Tomography

    E-Print Network [OSTI]

    Zeina, Abdel-Rauf; Kassem, Eiass; Klein, Adi; Nachtigal, Alicia

    2010-01-01T23:59:59.000Z

    Vein Thrombosis on Computed Tomography Abdel-Rauf Zeina*1. Unenhanced axial computed tomography (CT) (a-c) shows theBrain unenhanced computed tomography (CT) on admission

  4. Frequency of Incidental Findings on Computed Tomography of Trauma Patients

    E-Print Network [OSTI]

    Devine, Alicia S; Jackson, Corinne S; Lyons, Lisa; Mason, Jon D

    2010-01-01T23:59:59.000Z

    findings on trauma computed tomography scans: experience atfindings in brain computed tomography scans of 3000 headfindings on chest computed tomography angiography performed

  5. Patient Attitudes Regarding Consent for Emergency Department Computed Tomographies

    E-Print Network [OSTI]

    Weigner, Michael B; Basham, Hilary F; Dewar, Kate M; Rupp, Valerie A; Cornelius, Llewellyn; Greenberg, Marna Rayl

    2014-01-01T23:59:59.000Z

    associated with common Computed Tomography examinations andRegarding Consent for Computed Tomographies ucm2007191.htm.for Emergency Department Computed Tomographies Lehigh Valley

  6. advanced computed tomography: Topics by E-print Network

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

    2007-01-01 4 Geometric Tomography: A Limited-View Approach for Computed Tomography Computer Technologies and Information Sciences Websites Summary: Geometric Tomography: A...

  7. Use of ``rock-typing`` to characterize carbonate reservoir heterogeneity. Final report

    SciTech Connect (OSTI)

    Ikwuakor, K.C.

    1994-03-01T23:59:59.000Z

    The objective of the project was to apply techniques of ``rock-typing`` and quantitative formation evaluation to borehole measurements in order to identify reservoir and non-reservoir rock-types and their properties within the ``C`` zone of the Ordovician Red River carbonates in the northeast Montana and northwest North Dakota areas of the Williston Basin. Rock-typing discriminates rock units according to their pore-size distribution. Formation evaluation estimates porosities and pore fluid saturation. Rock-types were discriminated using crossplots involving three rock-typing criteria: (1) linear relationship between bulk density and porosity, (2) linear relationship between acoustic interval transit-time and porosity, and (3) linear relationship between acoustic interval transit-time and bulk density. Each rock-type was quantitatively characterized by the slopes and intercepts established for different crossplots involving the above variables, as well as porosities and fluid saturations associated with the rock-types. All the existing production was confirmed through quantitative formation evaluation. Highly porous dolomites and anhydritic dolomites contribute most of the production, and constitute the best reservoir rock-types. The results of this study can be applied in field development and in-fill drilling. Potential targets would be areas of porosity pinchouts and those areas where highly porous zones are downdip from non-porous and tight dolomites. Such areas are abundant. In order to model reservoirs for enhanced oil recovery (EOR) operations, a more localized (e.g. field scale) study, expanded to involve other rock-typing criteria, is necessary.

  8. Iron and Steel Phosphate Rock

    E-Print Network [OSTI]

    Torgersen, Christian

    Kyanite Lead Lime Lithium Magnesium Manganese Mercury Mica Molybdenum Nickel Nitrogen Peat Perlite Graphite Peat Sulfur Beryllium Gypsum Perlite Talc Bismuth Hafnium Phosphate Rock Tantalum Boron Helium information on the USGS--the Federal source for science about the Earth, its natural and living resources

  9. Lichen: the challenge for rock art conservation

    E-Print Network [OSTI]

    Dandridge, Debra Elaine

    2007-04-25T23:59:59.000Z

    This study investigates the effects that lichens have on rock surfaces in which ancient rock art (petroglyphs and pictographs) may be found. The study area includes four sites in the United States: one quartzite site in southwest Minnesota, two...

  10. Systematic errors in current quantum state tomography tools

    E-Print Network [OSTI]

    Christian Schwemmer; Lukas Knips; Daniel Richart; Tobias Moroder; Matthias Kleinmann; Otfried Ghne; Harald Weinfurter

    2014-07-22T23:59:59.000Z

    Common tools for obtaining physical density matrices in experimental quantum state tomography are shown here to cause systematic errors. For example, using maximum likelihood or least squares optimization for state reconstruction, we observe a systematic underestimation of the fidelity and an overestimation of entanglement. A solution for this problem can be achieved by a linear evaluation of the data yielding reliable and computational simple bounds including error bars.

  11. ANNUAL FISH PASSAGE REPORT ROCK ISLAND DAM

    E-Print Network [OSTI]

    ANNUAL FISH PASSAGE REPORT ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON, 1959 :y .iiJA/i-3ri ^' WUUUi. ANNUAL FISH PASSAGE REPORT - ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON, 1959 by Paul D. Zimmer, Clifton and observations 10 Summary 13 #12;#12;ANNUAL FISH PASSAGE REPORT - ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON

  12. ANNUAL FISH PASSAGE REPORT ROCK ISLAND DAM

    E-Print Network [OSTI]

    42) ANNUAL FISH PASSAGE REPORT ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON 1961 Marine Biological. McKeman, Director ANNUAL FISH PASSAGE REPORT - ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON, 1961--Fisheries No. 421 Washington, D. C. April 1962 #12;Rock Island Dam, Columbia River, Washington ii #12;CONTENTS

  13. Annual Fish Passage Report -Rock Island Dam

    E-Print Network [OSTI]

    Annual Fish Passage Report - Rock Island Dam Columbia River, Washington, 1965 By Paul D. Zimmer L. McKeman, Director Annual Fish Passage Report - Rock Island Dam Columbia River, Washington, 1965;#12;Annual Fish Passage Report - Rock Island Dam Columbia River, Washington, 1965 By PAUL D. ZIMMER, Fishery

  14. Introduction 1.1 Why study rocks?

    E-Print Network [OSTI]

    Lee, Cin-Ty Aeolus

    2 Chapter 1 Introduction 1.1 Why study rocks? I am a petrologist and I study rocks. Petrology and modification of certain types of rocks. On one level, petrology involves the art of identifying and classifying. This is of course the reverse of the historical development of petrology. I have chosen this approach because all

  15. Rock magnetism of remagnetized carbonate rocks: another look MIKE JACKSON* & NICHOLAS L. SWANSON-HYSELL

    E-Print Network [OSTI]

    Swanson-Hysell, Nicholas

    Rock magnetism of remagnetized carbonate rocks: another look MIKE JACKSON* & NICHOLAS L. SWANSON-HYSELL Institute for Rock Magnetism, Winchell School of Earth Sciences, University of Minnesota, Minnesota, US, dominantly in the super- paramagnetic and stable single-domain size range, also give rise to distinctive rock-magnetic

  16. Water Rock Interaction [WRI 14] Chemical weathering of granitic rocks: experimental approach and Pb-Li

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    of water/rock interactions both in terms of source and extent of weathering, by measuring major and traceWater Rock Interaction [WRI 14] Chemical weathering of granitic rocks: experimental approach and Pb, France Abstract In order to characterize water/rock interactions of granite, we performed laboratory

  17. Analysis of rock-fall and rock-fall avalanche seismograms in the French Alps

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    the source rock slope (Figure 1), the falling mass strikes the talus slope and breaks up and/or bounces1 Analysis of rock-fall and rock-fall avalanche seismograms in the French Alps J. Deparis, D reviews seismograms from 10 rock-fall events recorded between 1992 and 2001 by the permanent seismological

  18. 2.20 Properties of Rocks and Minerals -Magnetic Properties of Rocks and Minerals

    E-Print Network [OSTI]

    Dunin-Borkowski, Rafal E.

    2.20 Properties of Rocks and Minerals - Magnetic Properties of Rocks and Minerals R. J. Harrison, R 621 622 623 623 579 #12;580 Magnetic Properties of Rocks and Minerals 2.20.5.3 2.20.5.4 2, and are present in all types of rocks, sediments, and soils. These minerals retain a memory of the geomagnetic

  19. 37The Oldest Lunar Rocks Apollo astronauts recovered over 840 pounds of lunar rocks, and during

    E-Print Network [OSTI]

    37The Oldest Lunar Rocks Apollo astronauts recovered over 840 pounds of lunar rocks, and during applied to the different rock samples. Location Mission Rock Type Age (Myr) Mare Tranquillitatis Apollo-11 Basalt 3,500 Oceanus Procellarum Apollo-12 Basalt 3,200 Fra Mauro Formation Apollo-14 Basalt 4,150 Apollo

  20. Relative Permeability of Fractured Rock

    SciTech Connect (OSTI)

    Mark D. Habana

    2002-06-30T23:59:59.000Z

    Contemporary understanding of multiphase flow through fractures is limited. Different studies using synthetic fractures and various fluids have yielded different relative permeability-saturation relations. This study aimed to extend the understanding of multiphase flow by conducting nitrogen-water relative permeability experiments on a naturally-fractured rock from The Geysers geothermal field. The steady-state approach was used. However, steady state was achieved only at the endpoint saturations. Several difficulties were encountered that are attributed to phase interference and changes in fracture aperture and surface roughness, along with fracture propagation/initiation. Absolute permeabilities were determined using nitrogen and water. The permeability values obtained change with the number of load cycles. Determining the absolute permeability of a core is especially important in a fractured rock. The rock may change as asperities are destroyed and fractures propagate or st rain harden as the net stresses vary. Pressure spikes occurred in water a solute permeability experiments. Conceptual models of an elastic fracture network can explain the pressure spike behavior. At the endpoint saturations the water relative permeabilities obtained are much less than the nitrogen gas relative permeabilities. Saturations were determined by weighing and by resistivity calculations. The resistivity-saturation relationship developed for the core gave saturation values that differ by 5% from the value determined by weighing. Further work is required to complete the relative permeability curve. The steady-state experimental approach encountered difficulties due to phase interference and fracture change. Steady state may not be reached until an impractical length of time. Thus, unsteady-state methods should be pursued. In unsteady-state experiments the challenge will be in quantifying rock fracture change in addition to fluid flow changes.

  1. Low Pore Connectivity in Natural Rock. | EMSL

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

    RadEMSL Science Theme: Biosystem Dynamics & Design Energy Materials & Processes Terrestrial & Subsurface Ecosystems Instruments: X-ray Computed Tomography Publication year: 2012...

  2. Tomography of a laser wakefield accelerator Tomography of a laser wakefield accelerator

    E-Print Network [OSTI]

    history of laser-plasma accelerators is reviewed. The excitation of plasma waves by ultra-short laser Tomography of a laser wakefield accelerator Tomography of a laser wakefield accelerator 692220024 #12; Tomography of a laser wakefield accelerator i #12; Tomography of a laser

  3. Thermoacoustic and Photoacoustic Tomography ... - Purdue University

    E-Print Network [OSTI]

    Plamen Stefanov

    2010-11-09T23:59:59.000Z

    Thermoacoustic and Photoacoustic Tomography with a variable continuous or discontinuous sound speed. Plamen Stefanov. Purdue University. Based on a...

  4. Mathematics of Thermoacoustic and Photoacoustic Tomography

    E-Print Network [OSTI]

    Kuchment, Peter

    2007-01-01T23:59:59.000Z

    The paper presents a survey of mathematical problems, techniques, and challenges arising in the Thermoacoustic and Photoacoustic Tomography.

  5. Electron tomography of dislocation structures

    SciTech Connect (OSTI)

    Liu, G.S.; House, S.D.; Kacher, J. [Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green St., Urbana, IL 61801 (United States); Tanaka, M.; Higashida, K. [Department of Materials Science and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395 (Japan); Robertson, I.M., E-mail: irobertson@wisc.edu [Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green St., Urbana, IL 61801 (United States); Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53706 (United States)

    2014-01-15T23:59:59.000Z

    Recent developments in the application of electron tomography for characterizing microstructures in crystalline solids are described. The underlying principles for electron tomography are presented in the context of typical challenges in adapting the technique to crystalline systems and in using diffraction contrast imaging conditions. Methods for overcoming the limitations associated with the angular range, the number of acquired images, and uniformity of image contrast are introduced. In addition, a method for incorporating the real space coordinate system into the tomogram is presented. As the approach emphasizes development of experimental solutions to the challenges, the solutions developed and implemented are presented in the form of examples.

  6. Mathematics of thermoacoustic and photoacoustic tomography

    E-Print Network [OSTI]

    Mathematics of thermoacoustic and photoacoustic tomography Peter Kuchment and Leonid Kunyansky in the Thermoacoustic and Photoacoustic To- mography. 1 Introduction Medical tomography has had a huge impact on medical succesfull example of such a combination is the Thermoacoustic Tomography (TAT) (also abbreviated as TCT) [50

  7. PROGRAMME SPECIFICATION Programme name Radiography (Computed Tomography);

    E-Print Network [OSTI]

    Weyde, Tillman

    1 PROGRAMME SPECIFICATION KEY FACTS Programme name Radiography (Computed Tomography); Radiography in a clinical speciality, for example, Computed Tomography, you must successfully complete the Computed-time The postgraduate programmes in Radiography provide advanced education in #12;2 Computed Tomography and Medical

  8. Hot Dry Rock; Geothermal Energy

    SciTech Connect (OSTI)

    None

    1990-01-01T23:59:59.000Z

    The commercial utilization of geothermal energy forms the basis of the largest renewable energy industry in the world. More than 5000 Mw of electrical power are currently in production from approximately 210 plants and 10 000 Mw thermal are used in direct use processes. The majority of these systems are located in the well defined geothermal generally associated with crustal plate boundaries or hot spots. The essential requirements of high subsurface temperature with huge volumes of exploitable fluids, coupled to environmental and market factors, limit the choice of suitable sites significantly. The Hot Dry Rock (HDR) concept at any depth originally offered a dream of unlimited expansion for the geothermal industry by relaxing the location constraints by drilling deep enough to reach adequate temperatures. Now, after 20 years intensive work by international teams and expenditures of more than $250 million, it is vital to review the position of HDR in relation to the established geothermal industry. The HDR resource is merely a body of rock at elevated temperatures with insufficient fluids in place to enable the heat to be extracted without the need for injection wells. All of the major field experiments in HDR have shown that the natural fracture systems form the heat transfer surfaces and that it is these fractures that must be for geothermal systems producing from naturally fractured formations provide a basis for directing the forthcoming but, equally, they require accepting significant location constraints on HDR for the time being. This paper presents a model HDR system designed for commercial operations in the UK and uses production data from hydrothermal systems in Japan and the USA to demonstrate the reservoir performance requirements for viable operations. It is shown that these characteristics are not likely to be achieved in host rocks without stimulation processes. However, the long term goal of artificial geothermal systems developed by systematic engineering procedures at depth may still be attained if high temperature sites with extensive fracturing are developed or exploited. [DJE -2005

  9. Big Bang Day : Physics Rocks

    ScienceCinema (OSTI)

    None

    2011-04-25T23:59:59.000Z

    Is particle physics the new rock 'n' roll? The fundamental questions about the nature of the universe that particle physics hopes to answer have attracted the attention of some very high profile and unusual fans. Alan Alda, Ben Miller, Eddie Izzard, Dara O'Briain and John Barrowman all have interests in this branch of physics. Brian Cox - CERN physicist, and former member of 90's band D:Ream, tracks down some very well known celebrity enthusiasts and takes a light-hearted look at why this subject can appeal to all of us.

  10. Introduction to Positron Emission Tomography

    E-Print Network [OSTI]

    Oakes, Terry

    range: 1-10 mm Gamma-Ray range: 10 mm - 8 positron annihilation #12;Positron Emission Tomography #12;P.E.T. measures Concentration of Radioactivity 1) Gamma-rays escape from body: External detection possible. 2) Two gamma rays emitted at 180 when a positron annihilates: The annihilation occured somewhere

  11. Laboratory characterization of rock joints

    SciTech Connect (OSTI)

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

    1994-05-01T23:59:59.000Z

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

  12. The Landscape of Klamath Basin Rock Art

    E-Print Network [OSTI]

    David, Robert James

    2012-01-01T23:59:59.000Z

    I incorporate results from the XRF and projectile pointRay Fluorescence (hereafter, XRF) to help affiliate rock artstudies or reports in which XRF analysis have been done.

  13. Rock Bands/Rock Brands: Mediation and Musical Performance in Post-liberalization Bangalore

    E-Print Network [OSTI]

    Coventry, Chloe Louise

    2013-01-01T23:59:59.000Z

    as in its modes of fandom, production and dissemination. Inaspects of rock music fandom: America had everything a youngthe beginnings of rock music fandom in India, even while, as

  14. Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field...

    Open Energy Info (EERE)

    Rock-Water Interactions In Hot Dry Rock Geothermal Systems- Field Investigations Of In Situ Geochemical Behavior Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  15. Rock Port, Missouri: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-f < RAPID‎ |Rippey Jump to: navigation, searchRobbinsDensity AtRock

  16. Manufactured caverns in carbonate rock

    DOE Patents [OSTI]

    Bruce, David A.; Falta, Ronald W.; Castle, James W.; Murdoch, Lawrence C.

    2007-01-02T23:59:59.000Z

    Disclosed is a process for manufacturing underground caverns suitable in one embodiment for storage of large volumes of gaseous or liquid materials. The method is an acid dissolution process that can be utilized to form caverns in carbonate rock formations. The caverns can be used to store large quantities of materials near transportation facilities or destination markets. The caverns can be used for storage of materials including fossil fuels, such as natural gas, refined products formed from fossil fuels, or waste materials, such as hazardous waste materials. The caverns can also be utilized for applications involving human access such as recreation or research. The method can also be utilized to form calcium chloride as a by-product of the cavern formation process.

  17. Fluid substitution in rocks saturated with viscoelastic fluids Dina Makarynska1

    E-Print Network [OSTI]

    , Jyoti Behura3 , and Mike Batzle4 ABSTRACT Heavy oils have high densities and extremely high viscosities sands.We model the viscoelastic properties of a heavy- oil-saturated rock sample using CPA and a measured frequency- dependent complex shear modulus of the heavy oil. Comparison of modeled results

  18. WAVE GENERATIONS FROM CONFINED EXPLOSIONS IN ROCKS

    E-Print Network [OSTI]

    Stewart, Sarah T.

    WAVE GENERATIONS FROM CONFINED EXPLOSIONS IN ROCKS C. L. Liu and Thomas J. Ahrens Seismological Laboratory, California Institute of Technology, Pasadena, CA 91125 In order to record P- and S-waves on the interactions between incident P- and SV-waves and free-surfaces of rocks. The relations between particle

  19. Rheology of rock glaciers: a preliminary assessment

    SciTech Connect (OSTI)

    Giardino, J.R.; Vitek, J.D.; Hoskins, E.R.

    1985-01-01T23:59:59.000Z

    Movement of rock debris under the influence of gravity, i.e., mass movement, generates a range of phenomena from soil creep, through solifluction,debris flows and rock glaciers to rock falls. Whereas the resultant forms of these phenomena are different, common elements in the mechanics of movement are utilized in the basic interpretation of the processes of formation. Measurements of morphologic variables provide data for deductive analyses of processes that operate too slowly to observe or for processes that generated relict phenomena. External and internal characteristics or rock glacier morphometry and measured rates of motion serve as the basis for the development of a rheological model to explain phenomena classified as rock glaciers. A rock glacier in the Sangre de Cristo Mountains of Southern Colorado, which exhibits a large number of ridges and furrows and lichen bare fronts of lobes, suggests present day movement. A strain-net established on the surface provides evidence of movement characteristics. These data plus morphologic and fabric data suggest two rheological models to explain the flow of this rock glacier. Model one is based upon perfect plastic flow and model two is based upon stratified fluid movement with viscosity changing with depth. These models permit a better understanding of the movement mechanics and demonstrate that catastrophic events and slow creep contribute to the morphologic characteristics of this rock glacier.

  20. Damage and plastic deformation of reservoir rocks

    E-Print Network [OSTI]

    Ze'ev, Reches

    Damage and plastic deformation of reservoir rocks: Part 1. Damage fracturing Seth Busetti, Kyran mechanics, fluid flow in fractured reservoirs, and geomechanics in nonconventional reservoirs. Kyran Mish finite deformation of reservoir rocks. We present an at- tempt to eliminate the main limitations

  1. ANNUAL FISH PASSAGE REPORT ROCK ISLAND DAM

    E-Print Network [OSTI]

    ANNUAL FISH PASSAGE REPORT ROCK ISLAND DAM COLUMBIA RIVER, WASHINGTON 1960 . SPECIAL SCIENTIFIC ISLAND DAM COLUMBIA RIVER, WASHINGTON, 1960 by Paul D. Zimmer and Clifton C. Davidson United States Fish This annual report of fishway operations at Rock Island Dam in 1960 is dedicated to the memory of co

  2. ROCK ELASTIC PROPERTIES: DEPENDENCE ON MICROSTRUCTURE

    E-Print Network [OSTI]

    ROCK ELASTIC PROPERTIES: DEPENDENCE ON MICROSTRUCTURE James G. Berryman and Patricia A. Berge Lawrence Livermore National Laboratory P. O. Box 808 L202 Livermore, CA 945519900 #12; ROCK ELASTIC PROPERTIES: DEPENDENCE ON MICROSTRUCTURE James G. Berryman and Patricia A. Berge Lawrence Livermore National

  3. Large-Scale Fabrication, 3D Tomography, and Lithium-Ion Battery Application of Porous Silicon

    E-Print Network [OSTI]

    Zhou, Chongwu

    Large-Scale Fabrication, 3D Tomography, and Lithium-Ion Battery Application of Porous Silicon, United States *S Supporting Information ABSTRACT: Recently, silicon-based lithium-ion battery anodes have for the next-generation lithium-ion batteries with enhanced capacity and energy density. KEYWORDS: Cost

  4. Fresnel tomography: a novel approach to the wave function reconstruction based on Fresnel representation of tomograms

    E-Print Network [OSTI]

    S. De Nicola; R. Fedele; M. A. Man'ko; V. I. Man'ko

    2005-03-03T23:59:59.000Z

    New type of tomographic probability distribution, which contains complete information on the density matrix (wave function) related to the Fresnel transform of the complex wave function, is introduced. Relation to symplectic tomographic probability distribution is elucidated. Multimode generalization of the Fresnel tomography is presented. Examples of applications of the present approach are given.

  5. Self-guided quantum tomography

    E-Print Network [OSTI]

    Christopher Ferrie

    2014-11-10T23:59:59.000Z

    We introduce a self-learning tomographic technique in which the experiment guides itself to an estimate of its own state. Self-guided quantum tomography (SGQT) uses measurements to directly test hypotheses in an iterative algorithm which converges to the true state. We demonstrate through simulation on many qubits that SGQT is a more efficient and robust alternative to the usual paradigm of taking a large amount of informationally complete data and solving the inverse problem of post-processed state estimation.

  6. Specific energy for pulsed laser rock drilling.

    SciTech Connect (OSTI)

    Xu, Z.; Reed, C. B.; Kornecki, G.; Gahan, B. C.; Parker, R. A.; Batarseh, S.; Graves, R. M.; Figueroa, H.; Skinner, N.; Technology Development

    2003-02-01T23:59:59.000Z

    Application of advanced high power laser technology to oil and gas well drilling has been attracting significant research interests recently among research institutes, petroleum industries, and universities. Potential laser or laser-aided oil and gas well drilling has many advantages over the conventional rotary drilling, such as high penetration rate, reduction or elimination of tripping, casing, and bit costs, and enhanced well control, perforating and side-tracking capabilities. The energy required to remove a unit volume of rock, namely the specific energy (SE), is a critical rock property data that can be used to determine both the technical and economic feasibility of laser oil and gas well drilling. When a high power laser beam is applied on a rock, it can remove the rock by thermal spallation, melting, or vaporization depending on the applied laser energy and the way the energy is applied. The most efficient rock removal mechanism would be the one that requires the minimum energy to remove a unit volume of rock. Samples of sandstone, shale, and limestone were prepared for laser beam interaction with a 1.6 kW pulsed Nd:yttrium-aluminum-garnet laser beam to determine how the beam size, power, repetition rate, pulse width, exposure time and energy can affect the amount of energy transferred to the rock for the purposes of spallation, melting, and vaporization. The purpose of the laser rock interaction experiment was to determine the optimal parameters required to remove a maximum rock volume from the samples while minimizing energy input. Absorption of radiant energy from the laser beam gives rise to the thermal energy transfer required for the destruction and removal of the rock matrix. Results from the tests indicate that each rock type has a set of optimal laser parameters to minimize specific energy (SE) values as observed in a set of linear track and spot tests. As absorbed energy outpaces heat diffusion by the rock matrix, local temperatures can rise to the melting points of the minerals and quickly increase observed SE values. Tests also clearly identified the spallation and melting zones for shale samples while changing the laser power. The lowest SE values are obtained in the spalling zone just prior to the onset of mineral melt. The laser thermally spalled and saw mechanically cut rocks show similarity of surface microstructure. The study also found that increasing beam repetition rate within the same material removal mechanism would increase the material removal rate, which is believed due to an increase of maximum temperature, thermal cycling frequency, and intensity of laser-driven shock wave within the rock.

  7. FRACTURE DETECTION IN CRYSTALLINE ROCK USING ULTRASONIC SHEAR WAVES

    E-Print Network [OSTI]

    Waters, K.H.

    2011-01-01T23:59:59.000Z

    the piezoelectric source plate and the rock surface. With aThe S^j sources were bonded to the rock surface with a fast-^ source plate was epoxied in position on the rock specimen.

  8. Relation between quantum tomography and optical Fresnel transform

    E-Print Network [OSTI]

    Hong-yi Fan; Li-yun Hu

    2008-01-13T23:59:59.000Z

    Corresponding to optical Fresnel transformation characteristic of ray transfer matrix elements (A;B;C;D); AD-BC = 1, there exists Fresnel operator F(A;B;C;D) in quantum optics, we show that under the Fresnel transformation the pure position density |x>_rs,rs__rs,rs_Fresnel quadrature phase is the tomography (Radon transform of Wigner function), and the tomogram of a state |phi> is just the wave function of its Fresnel transformed state F|phi>, i.e. rs_= . Similarly, we find F|p>_rs,rs_

  9. THERMOACOUSTIC TOMOGRAPHY ARISING IN BRAIN IMAGING ...

    E-Print Network [OSTI]

    2011-02-21T23:59:59.000Z

    In this paper, we study the mathematical model of thermoacoustic and photoacoustic tomography for a sound speed that jumps across a smooth closed surface.

  10. Imaging and sensing based on muon tomography

    DOE Patents [OSTI]

    Morris, Christopher L; Saunders, Alexander; Sossong, Michael James; Schultz, Larry Joe; Green, J. Andrew; Borozdin, Konstantin N; Hengartner, Nicolas W; Smith, Richard A; Colthart, James M; Klugh, David C; Scoggins, Gary E; Vineyard, David C

    2012-10-16T23:59:59.000Z

    Techniques, apparatus and systems for detecting particles such as muons for imaging applications. Subtraction techniques are described to enhance the processing of the muon tomography data.

  11. Algorithm for Rapid Tomography of Gas Concentrations

    E-Print Network [OSTI]

    Price, P.N.

    2008-01-01T23:59:59.000Z

    sensing and computed tomography in industrial hygiene.American Industrial Hygiene Association Journal 51: 1165-indoor air. American Industrial Hygiene Association Journal

  12. Metal Artifact Reduction in Computed Tomography /

    E-Print Network [OSTI]

    Karimi, Seemeen

    2014-01-01T23:59:59.000Z

    Monoenergetic imaging of dual-energy CT reduces artifactsartifact reduction by dual energy computed tomography usingimage re- construction for dual energy X-ray transmission

  13. Lower crustal density estimation using the density-slowness relationship: a preliminary study

    E-Print Network [OSTI]

    Jones, Gary Wayne

    1996-01-01T23:59:59.000Z

    , and seismic velocity models were used to estimate the densities of th lower crustal rocks frcm the Wind River Mountains, the Ivrea Zone in Italy, and the average 1~ continental crustal model developed b/ ~istensen and Mconey [1995] . The. densities... by Carlson and Raskin [1984) yields a precision of about 1 percent. 'Ihe objective of this study is to evaluate this approach to estimate the density of the more complex continental crust, which is more variable in composition and affected hy a wider range...

  14. On reconstruction and time reversal in thermoacoustic tomography in acoustically

    E-Print Network [OSTI]

    Kuchment, Peter

    On reconstruction and time reversal in thermoacoustic tomography in acoustically homogeneous of recent approaches to the reconstruction in thermoacoustic/photoacoustic tomography: backprojection of the problem of sound speed recovery is also provided. Keywords: Tomography, thermoacoustic, wave equation. AMS

  15. Two-dimensional ultrasonic computed tomography of growing bones.

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Two-dimensional ultrasonic computed tomography of growing bones. P. Lasaygues, E. Franceschini, R: Ultrasonic Computed Tomography, Bone imaging, Born approximation, iterative distorted method I. INTRODUCTION imaging process, using ultrasonic computed tomography. Although this method is known to provide

  16. Computational confocal tomography for simultaneous reconstruction of objects, occlusions,

    E-Print Network [OSTI]

    Fainman, Yeshaiahu

    Computational confocal tomography for simultaneous reconstruction of objects, occlusions computationally intense and novel reconstruction methods that we called "compu- tational confocal tomography." The key to computed tomography is the collection of projections of the data over a range of angles

  17. CLINICAL RESEARCH Clinical Trials Coronary Computed Tomography Angiography

    E-Print Network [OSTI]

    CLINICAL RESEARCH Clinical Trials Coronary Computed Tomography Angiography for Early Triage computed tomography angiography (CTA) in patients with acute chest pain. Background Triage of chest pain disease (CAD), 31% had nonobstructive disease, and 19% had inconclusive or positive computed tomography

  18. Dynamic Computed Tomography, an algebraic reconstruction method with

    E-Print Network [OSTI]

    Promayon, Emmanuel

    Dynamic Computed Tomography, an algebraic reconstruction method with deformation compensation Sofia . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.2 Computed Tomography . . . . . . . . . . . . . . . . . . . . . . 8 1.3 Dynamic Computed . . . . . . . . . . . . . . . . . . . . . 9 2 Basic tools for Computed Tomography 10 2.1 The Radon Transform

  19. altered granitic rock: Topics by E-print Network

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

    22 Everglades National Park Groundwater wells Surface water monitoring locations Rock mining locations 12 Demers, Nora Egan 211 Nova Scotia Rock Garden Club Membership...

  20. Regional Geology: GIS Database for Alternative Host Rocks and...

    Energy Savers [EERE]

    Regional Geology: GIS Database for Alternative Host Rocks and Potential Siting Guidelines Regional Geology: GIS Database for Alternative Host Rocks and Potential Siting Guidelines...

  1. aspo hard rock: Topics by E-print Network

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

    Bayesian estimation of rock mass boundary conditions with applications to the AECL underground research laboratory F. Tonon*,1 conditions for rock mass models is...

  2. antarctic rocks colonized: Topics by E-print Network

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

    Bayesian estimation of rock mass boundary conditions with applications to the AECL underground research laboratory F. Tonon*,1 conditions for rock mass models is...

  3. algonquin class rocks: Topics by E-print Network

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

    Bayesian estimation of rock mass boundary conditions with applications to the AECL underground research laboratory F. Tonon*,1 conditions for rock mass models is...

  4. acidic crystalline rock: Topics by E-print Network

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

    Bayesian estimation of rock mass boundary conditions with applications to the AECL underground research laboratory F. Tonon*,1 conditions for rock mass models is...

  5. aphanitic melt rocks: Topics by E-print Network

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

    Bayesian estimation of rock mass boundary conditions with applications to the AECL underground research laboratory F. Tonon*,1 conditions for rock mass models is...

  6. aespoe hard rock: Topics by E-print Network

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

    Bayesian estimation of rock mass boundary conditions with applications to the AECL underground research laboratory F. Tonon*,1 conditions for rock mass models is...

  7. Stress and fault rock controls on fault zone hydrology, Coso...

    Open Energy Info (EERE)

    rock controls on fault zone hydrology, Coso geothermal field, CA Abstract In crystalline rock of the Coso Geothermal Field, CA, fractures are the primary source of permeability....

  8. EIS-0471: Areva Eagle Rock Enrichment Facility in Bonneville...

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

    1: Areva Eagle Rock Enrichment Facility in Bonneville County, ID EIS-0471: Areva Eagle Rock Enrichment Facility in Bonneville County, ID May 20, 2011 EIS-0471: Final Environmental...

  9. Prevalence of Incidental Findings on Abdominal Computed Tomography Angiograms on Prospective Renal Donors

    E-Print Network [OSTI]

    2015-01-01T23:59:59.000Z

    multidetector computed tomography angiography. Transplantof Radiology CT: computed tomography IF: incidental findings

  10. Utilization of Computed Tomography Angiography in the Evaluation of Acute Pulmonary Embolus

    E-Print Network [OSTI]

    Constantino, Mary; Randall, Geneva; Gosselin, Marc; Vegas, Carl; Brandt, Marissa; Spinning, Kristopher

    2007-01-01T23:59:59.000Z

    providers. Utilization of Computed Tomography Angiography inappropriate use of computed tomography angiography (CTA) in

  11. Rock bed behavior and reverse thermosiphon effects

    SciTech Connect (OSTI)

    Perry, J.E.

    1980-01-01T23:59:59.000Z

    Two rock beds, in the Mark Jones and Doug Balcomb houses, have been instrumented, monitored, and analyzed. Observed experimental operation has been compared with, or explained by, theoretical predictions. The latter are based on one-dimensional finite-difference computer calculation of rock bed charging and discharging, with fixed or variable inputs of air flow rate and temperature. Both rock beds exhibit appreciable loss of stored heat caused by lack of backdraft dampers or incomplete closure of such dampers. These topics are discussed, and some improvements that might be made in future installations are noted.

  12. Relation between Optical Fresnel transformation and quantum tomography in two-mode entangled case

    E-Print Network [OSTI]

    Hong-yi Fan; Li-yun Hu

    2009-11-09T23:59:59.000Z

    Similar in spirit to the preceding work [Opt. Commun. 282 (2009) 3734] where the relation between optical Fresnel transformation and quantum tomography is revealed, we study this kind of relationship in the two-mode entangled case. We show that under the two-mode Fresnel transformation the bipartite entangled state density |eta>_{r,s}Fresnel operator in quantum optics, and s,r are the complex-value expression of (A, B, C,D). So the probability distribution for the Fresnel quadrature phase is the {tomography (Radon transform of the two-mode Wigner function), correspondingly, {s,r}_=. Similarly, we find a simial conclusion in the `frequency` domain.

  13. ADAPTIVE AND ROBUST TECHNIQUES (ART) FOR THERMOACOUSTIC TOMOGRAPHY

    E-Print Network [OSTI]

    Xie, Yao

    ADAPTIVE AND ROBUST TECHNIQUES (ART) FOR THERMOACOUSTIC TOMOGRAPHY By YAO XIE A DISSERTATION.1 Thermoacoustic Tomography . . . . . . . . . . . . . . . . . . . . . 1 1.2 Image Reconstruction Algorithms for TAT

  14. HEAVY-ION RADIOGRAPHY AND HEAVY-ION COMPUTED TOMOGRAPHY

    E-Print Network [OSTI]

    Fabrikant, J.I.

    2010-01-01T23:59:59.000Z

    RADIOGRAPHY AND HEAVY-ION COMPUTED TOMOGRAPHY 1,2 Jacob I .RADIOGRAPHY AND HEAVY-ION COMPUTED TOMOGRAPHY J I Fabrikant,

  15. Using X-Ray Computed Tomography in Pore Structure Characterization...

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

    Using X-Ray Computed Tomography in Pore Structure Characterization for a Berea Sandstone: Resolution Effect. Using X-Ray Computed Tomography in Pore Structure Characterization for...

  16. Thermoacoustic Tomography in Elastic Media

    E-Print Network [OSTI]

    Justin Tittelfitz

    2011-10-11T23:59:59.000Z

    We investigate the problem of recovering the initial displacement f for a solution u of a linear, isotropic, non-homogeneous elastic wave equation, given measurements of u on [0,T] x \\partial \\Omega, where \\Omega\\subset\\R^3 is some bounded domain containing the support of f. For the acoustic wave equation, this problem is known as thermoacoustic tomography (TAT), and has been well-studied; for the elastic wave equation, the situation is somewhat more subtle, and we give sufficient conditions on the Lam\\'e parameters to ensure that recovery is possible.

  17. Surface Impedance Tomography for Antarctic Sea Ice

    E-Print Network [OSTI]

    Golden, Kenneth M.

    Surface Impedance Tomography for Antarctic Sea Ice C. Sampsona , K. M. Goldena , A. Gullya , A. P, Australia Abstract During the 2007 SIPEX expedition in pack ice off the coast of East Antarctica, we measured the electrical conductivity of sea ice via surface impedance tomography. Resistance data from

  18. Efficiency of quantum state tomography for qubits

    E-Print Network [OSTI]

    Koichi Yamagata

    2011-05-19T23:59:59.000Z

    The efficiency of quantum state tomography is discussed from the point of view of quantum parameter estimation theory, in which the trace of the weighted covariance is to be minimized. It is shown that tomography is optimal only when a special weight is adopted.

  19. REVIEW Open Access Micro computed tomography for

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    REVIEW Open Access Micro computed tomography for vascular exploration Lyubomir Zagorchev1 studies. Micro Computed Tomography (micro-CT) has emerged in recent years as the preferred modality and suggestions aimed at making micro-CT more accurate, replicable, and robust. Introduction Micro Computed

  20. Rock Slopes from Mechanics to Decision Making

    E-Print Network [OSTI]

    Einstein, Herbert H.

    Rock slope instabilities are discussed in the context of decision making for risk assessment and management. Hence, the state of the slope and possible failure mechanism need to be defined first. This is done with geometrical ...

  1. First Rocks from Outside the Solar System

    SciTech Connect (OSTI)

    Westphal, Andrew

    2014-10-17T23:59:59.000Z

    Andrew Westphal presents his findings in examining the first rocks from outside the solar system at our '8 Big Ideas' Science at the Theater event on October 8th, 2014, in Oakland, California.

  2. Determination of mechanical properties of reservoir rock

    E-Print Network [OSTI]

    Barnett, Ashley

    1993-01-01T23:59:59.000Z

    Apparatus, experimental procedure, and methodology have been developed to determine the mechanical response of reservoir rock. The apparatus is capable of subjecting cylindrical core specimens to triaxial stress states and temperatures...

  3. Stress-induced transverse isotropy in rocks

    SciTech Connect (OSTI)

    Schwartz, L.M.; Murphy, W.F. III [Schlumberger-Doll Research Center, Ridgefield, CT (United States); Berryman, J.G. [Lawrence Livermore National Lab., CA (United States)

    1994-03-28T23:59:59.000Z

    The application of uniaxial pressure can induce elastic anisotropy in otherwise isotropic rock. We consider models based on two very different rock classes, granites and weakly consolidated granular systems. We show that these models share common underlying assumptions, that they lead to similar qualitative behavior, and that both provide a microscopic basis for elliptical anisotropy. In the granular case, we make experimentally verifiable predictions regarding the horizontally propagating modes based on the measured behavior of the vertical modes.

  4. Design of tabular excavations in foliated rock: an integrated numerical

    E-Print Network [OSTI]

    to the mineralized zone (development openings), extracting the ore from the surrounding host rock (stopes. The first stage in the design process is the characterization of the rock mass using both in situ of the mining process, requiring that the rock mass stability, both within the orebody and in the rock adjacent

  5. Mixture Theories for Rock Properties James G. Berryman

    E-Print Network [OSTI]

    Mixture Theories for Rock Properties James G. Berryman Lawrence Livermore National Laboratory by Batchelor [3], Hale [41], Hashin [42], Torquato [95], and Willis [110] are also recommended. 1.1. Rocks Are Inhomogeneous Materials A rock is a naturally occurring mixture of minerals. Rocks are normally inhomogeneous

  6. Idiopathic juvenile osteoporosis: a cross-sectional single-centre experience with bone histomorphometry and quantitative computed tomography

    E-Print Network [OSTI]

    Bacchetta, Justine; Wesseling-Perry, Katherine; Gilsanz, Vicente; Gales, Barbara; Pereira, Renata C; Salusky, Isidro B

    2013-01-01T23:59:59.000Z

    and quantitative computed tomography. Pediatric Rheumatologyand quantitative computed tomography Justine Bacchetta 1 ,by quantitative computed tomography (QCT) and their

  7. Roadmap: Radiologic Imaging Sciences -Computed Tomography (with AAS Radiologic Technology) -

    E-Print Network [OSTI]

    Sheridan, Scott

    Roadmap: Radiologic Imaging Sciences - Computed Tomography (with AAS Radiologic Technology 34084 Computed Tomography and Magnetic Resonance Imaging Sectional Anatomy I 2 C RIS 44021 Patient Management in Computed Tomography (CT) 2 C RIS 44025 Computed Tomography (CT) Clinical Education I 3 C

  8. Reconstruction Algorithm for Single Photon Emission Computed Tomography and its

    E-Print Network [OSTI]

    Fokas, A. S.

    Reconstruction Algorithm for Single Photon Emission Computed Tomography and its Numerical Emission Tomography and of Single Photon Emission Computed Tomography are not only two of the most measured by the usual computed tomography. Thus the basic mathematical problem in SPECT is to determine

  9. Positron emission tomography wrist detector

    DOE Patents [OSTI]

    Schlyer, David J. (Bellport, NY); O'Connor, Paul (Bellport, NY); Woody, Craig (Setauket, NY); Junnarkar, Sachin Shrirang (Sound Beach, NY); Radeka, Veljko (Bellport, NY); Vaska, Paul (Sound Beach, NY); Pratte, Jean-Francois (Stony Brook, NY)

    2006-08-15T23:59:59.000Z

    A method of serially transferring annihilation information in a compact positron emission tomography (PET) scanner includes generating a time signal representing a time-of-occurrence of an annihilation event, generating an address signal representing a channel detecting the annihilation event, and generating a channel signal including the time and address signals. The method also includes generating a composite signal including the channel signal and another similarly generated channel signal concerning another annihilation event. An apparatus that serially transfers annihilation information includes a time signal generator, address signal generator, channel signal generator, and composite signal generator. The time signal is asynchronous and the address signal is synchronous to a clock signal. A PET scanner includes a scintillation array, detection array, front-end array, and a serial encoder. The serial encoders include the time signal generator, address signal generator, channel signal generator, and composite signal generator.

  10. Collimator-free photon tomography

    DOE Patents [OSTI]

    Dilmanian, F. Avraham (Yaphank, NY); Barbour, Randall L. (Westbury, NY)

    1998-10-06T23:59:59.000Z

    A method of uncollimated single photon emission computed tomography includes administering a radioisotope to a patient for producing gamma ray photons from a source inside the patient. Emissivity of the photons is measured externally of the patient with an uncollimated gamma camera at a plurality of measurement positions surrounding the patient for obtaining corresponding energy spectrums thereat. Photon emissivity at the plurality of measurement positions is predicted using an initial prediction of an image of the source. The predicted and measured photon emissivities are compared to obtain differences therebetween. Prediction and comparison is iterated by updating the image prediction until the differences are below a threshold for obtaining a final prediction of the source image.

  11. Collimator-free photon tomography

    DOE Patents [OSTI]

    Dilmanian, F.A.; Barbour, R.L.

    1998-10-06T23:59:59.000Z

    A method of uncollimated single photon emission computed tomography includes administering a radioisotope to a patient for producing gamma ray photons from a source inside the patient. Emissivity of the photons is measured externally of the patient with an uncollimated gamma camera at a plurality of measurement positions surrounding the patient for obtaining corresponding energy spectrums thereat. Photon emissivity at the plurality of measurement positions is predicted using an initial prediction of an image of the source. The predicted and measured photon emissivities are compared to obtain differences therebetween. Prediction and comparison is iterated by updating the image prediction until the differences are below a threshold for obtaining a final prediction of the source image. 6 figs.

  12. Deep drilling technology for hot crystalline rock

    SciTech Connect (OSTI)

    Rowley, J.C.

    1984-01-01T23:59:59.000Z

    The development of Hot Dry Rock (HDR) geothermal systems at the Fenton Hill, New Mexico site has required the drilling of four deep boreholes into hot, Precambrian granitic and metamorphic rocks. Thermal gradient holes, four observation wells 200 m (600 ft) deep, and an exploration core hole 800 m (2400 ft) deep guided the siting of the four deep boreholes. Results derived from the exploration core hole, GT-1 (Granite Test No. 1), were especially important in providing core from the granitic rock, and establishing the conductive thermal gradient and heat flow for the granitic basement rocks. Essential stratigraphic data and lost drilling-fluid zones were identified for the volcanic and sedimentary rocks above the contact with the crystalline basement. Using this information drilling strategies and well designs were then devised for the planning of the deeper wells. The four deep wells were drilled in pairs, the shallowest were planned and drilled to depths of 3 km in 1975 at a bottom-hole temperature of nearly 200/sup 0/C. These boreholes were followed by a pair of wells, completed in 1981, the deepest of which penetrated the Precambrian basement to a vertical depth of 4.39 km at a temperature of 320/sup 0/C.

  13. The thin section rock physics: Modeling and measurement of seismic wave velocity on the slice of carbonates

    SciTech Connect (OSTI)

    Wardaya, P. D., E-mail: pongga.wardaya@utp.edu.my; Noh, K. A. B. M., E-mail: pongga.wardaya@utp.edu.my; Yusoff, W. I. B. W., E-mail: pongga.wardaya@utp.edu.my [Petroleum Geosciences Department, Universiti Teknologi PETRONAS, Tronoh, Perak, 31750 (Malaysia); Ridha, S. [Petroleum Engineering Department, Universiti Teknologi PETRONAS, Tronoh, Perak, 31750 (Malaysia); Nurhandoko, B. E. B. [Wave Inversion and Subsurface Fluid Imaging Research Laboratory (WISFIR), Dept. of Physics, Institute of Technology Bandung, Bandung, Indonesia and Rock Fluid Imaging Lab, Bandung (Indonesia)

    2014-09-25T23:59:59.000Z

    This paper discusses a new approach for investigating the seismic wave velocity of rock, specifically carbonates, as affected by their pore structures. While the conventional routine of seismic velocity measurement highly depends on the extensive laboratory experiment, the proposed approach utilizes the digital rock physics view which lies on the numerical experiment. Thus, instead of using core sample, we use the thin section image of carbonate rock to measure the effective seismic wave velocity when travelling on it. In the numerical experiment, thin section images act as the medium on which wave propagation will be simulated. For the modeling, an advanced technique based on artificial neural network was employed for building the velocity and density profile, replacing image's RGB pixel value with the seismic velocity and density of each rock constituent. Then, ultrasonic wave was simulated to propagate in the thin section image by using finite difference time domain method, based on assumption of an acoustic-isotropic medium. Effective velocities were drawn from the recorded signal and being compared to the velocity modeling from Wyllie time average model and Kuster-Toksoz rock physics model. To perform the modeling, image analysis routines were undertaken for quantifying the pore aspect ratio that is assumed to represent the rocks pore structure. In addition, porosity and mineral fraction required for velocity modeling were also quantified by using integrated neural network and image analysis technique. It was found that the Kuster-Toksoz gives the closer prediction to the measured velocity as compared to the Wyllie time average model. We also conclude that Wyllie time average that does not incorporate the pore structure parameter deviates significantly for samples having more than 40% porosity. Utilizing this approach we found a good agreement between numerical experiment and theoretically derived rock physics model for estimating the effective seismic wave velocity of rock.

  14. Predicting stress-induced velocity anisotropy in rocks

    SciTech Connect (OSTI)

    Mavko, G.; Mukerji, T.; Godfrey, N. [Stanford Univ., CA (United States). Rock Physics Lab.] [Stanford Univ., CA (United States). Rock Physics Lab.

    1995-07-01T23:59:59.000Z

    A simple transformation, using measured isotropic V{sub P} and V{sub S} versus hydrostatic pressure, is presented for predicting stress-induced seismic velocity anisotropy in rocks. The compliant, crack-like portions of the pore space are characterized by generalized compressional and shear compliances that are estimated form the isotropic V{sub P} and V{sub S}. The physical assumption that the compliant porosity is crack-like means that the pressure dependence of the generalized compliances is governed primarily by normal tractions resolved across cracks and defects. This allows the measured pressure dependence to be mapped form the hydrostatic stress state to any applied nonhydrostatic stress. Predicted P- and S-wave velocities agree reasonably well with uniaxial stress data for Barre Granite and Massillon Sandstone. While it is mechanically similar to methods based on idealized ellipsoidal cracks, the approach is relatively independent of any assumed crack geometry and is not limited to small crack densities.

  15. Seismic-Scale Rock Physics of Methane Hydrate

    SciTech Connect (OSTI)

    Amos Nur

    2009-01-08T23:59:59.000Z

    We quantify natural methane hydrate reservoirs by generating synthetic seismic traces and comparing them to real seismic data: if the synthetic matches the observed data, then the reservoir properties and conditions used in synthetic modeling might be the same as the actual, in-situ reservoir conditions. This approach is model-based: it uses rock physics equations that link the porosity and mineralogy of the host sediment, pressure, and hydrate saturation, and the resulting elastic-wave velocity and density. One result of such seismic forward modeling is a catalogue of seismic reflections of methane hydrate which can serve as a field guide to hydrate identification from real seismic data. We verify this approach using field data from known hydrate deposits.

  16. Source rock maturation, San Juan sag

    SciTech Connect (OSTI)

    Gries, R.R.; Clayton, J.L.

    1989-09-01T23:59:59.000Z

    Kinetic modeling for thermal histories was simulated for seven wells in the San Juan sag honoring measured geochemical data. Wells in the area of Del Norte field (Sec. 9, T40N, R5E), where minor production has been established from an igneous sill reservoir, show that the Mancos Shale source rocks are in the mature oil generation window as a combined result of high regional heat flow and burial by approximately 2,700 m of Oligocene volcanic rocks. Maturation was relatively recent for this area and insignificant during Laramide subsidence. In the vicinity of Gramps field (Sec. 24, T33N, R2E) on the southwest flank of the San Juan sag, these same source rocks are exposed due to erosion of the volcanic cover but appear to have undergone a similar maturation history. At the north and south margins of the sag, two wells (Champlin 34A-13, Sec. 13, T35N, R4.5E; and Champlin 24A-1, Sec. 1, T44N, R5E) were analyzed and revealed that although the regional heat flow was probably similar to other wells, the depth of burial was insufficient to cause maturation (except where intruded by thick igneous sills that caused localized maturation). The Meridian Oil 23-17 South Fork well (Sec. 17, T39N, R4E) was drilled in a deeper part of the San Juan sag, and source rocks were intruded by numerous igneous sills creating a complex maturation history that includes overmature rocks in the lowermost Mancos Shale, possible CO{sub 2} generation from the calcareous Niobrara Member of the Mancos Shale, and mature source rocks in the upper Mancos Shale.

  17. Binary Tomography with Deblurring Stefan Weber1

    E-Print Network [OSTI]

    Schnörr, Christoph

    Binary Tomography with Deblurring Stefan Weber1 , Thomas Sch¨ule1,3 , Attila Kuba2 , and Christoph-Verlag Berlin Heidelberg 2006 #12;376 S. Weber et al. quality of the reconstructed images. The correction

  18. Rock melting tool with annealer section

    DOE Patents [OSTI]

    Bussod, Gilles Y. (Santa Fe, NM); Dick, Aaron J. (Oakland, CA); Cort, George E. (Montrose, CO)

    1998-01-01T23:59:59.000Z

    A rock melting penetrator is provided with an afterbody that rapidly cools a molten geological structure formed around the melting tip of the penetrator to the glass transition temperature for the surrounding molten glass-like material. An annealing afterbody then cools the glass slowly from the glass transition temperature through the annealing temperature range to form a solid self-supporting glass casing. This allows thermally induced strains to relax by viscous deformations as the molten glass cools and prevents fracturing of the resulting glass liner. The quality of the glass lining is improved, along with its ability to provide a rigid impermeable casing in unstable rock formations.

  19. Oilfield rock bits: Are they a commodity

    SciTech Connect (OSTI)

    Caldwell, R.

    1994-05-01T23:59:59.000Z

    This paper discusses the quality of various types of rock drill bits and evaluates cost of these bits against service and performance to determine if bits should be viewed as a commodity when drilling a production or exploration well. Continuing advancements in materials technology, machining capabilities, hydraulics arrangements, bearing configuration, seal technology and cutter design continue to push the performance curve for oilfield rock bits. However, some very important advancements are patented, proprietary features of individual manufacturers. This paper reviews some of these design and performance features to help determine if they are worth the extra investment based on actual field drilling experience.

  20. Specific energy for laser removal of rocks.

    SciTech Connect (OSTI)

    Xu, Z.; Kornecki, G.; Reed, C. B.; Gahan, B. C.; Parker, R. A.; Batarseh, S.; Graves, R. M.

    2001-08-16T23:59:59.000Z

    Application of advanced high power laser technology into oil and gas well drilling has been attracting significant research interests recently among research institutes, petroleum industries, and universities. Potential laser or laser-aided oil and gas well drilling has many advantages over the conventional rotary drilling, such as high penetration rate, reduction or elimination of tripping, casing, and bit costs, and enhanced well control, perforating and side-tracking capabilities. The energy required to remove a unit volume of rock, namely the specific energy (SE), is a critical rock property data that can be used to determine both the technical and economic feasibility of laser oil and gas well drilling.

  1. ECG-edit function in multidetector-row computed tomography coronary arteriography for patients with arrhythmias.

    E-Print Network [OSTI]

    2008-01-01T23:59:59.000Z

    multi- detector row computed tomography for the evaluationwith multislice computed tomography. J Am Coll Cardiol 2001;multi- detector-row computed tomography: Results in 102

  2. Reduction in downstream test utilization following introduction of coronary computed tomography in a cardiology practice

    E-Print Network [OSTI]

    Karlsberg, Ronald P.; Budoff, Matthew J.; Thomson, Louise E.; Friedman, John D.; Berman, Daniel S.

    2010-01-01T23:59:59.000Z

    introduction of coronary computed tomography in a cardiologyphoton emission computed tomography (SPECT) myocardial Multi-slice computed tomography Multi-detector computed

  3. Potentially Low Cost Solution to Extend Use of Early Generation Computed Tomography

    E-Print Network [OSTI]

    Tonna, Joseph E; Balanoff, Amy M; Lewin, Matthew R; Saandari, Namjilmaa; Wintermark, Max

    2010-01-01T23:59:59.000Z

    of Early Generation Computed Tomography Joseph E. Tonna, MD*two- dimensional (2D) computed tomography (CT) images. ThisWhile many modern computed tomography (CT) scanners contain

  4. Sensitivity of Emergency Bedside Ultrasound to Detect Hydronephrosis in Patients with Computed Tomography-proven Stones

    E-Print Network [OSTI]

    2014-01-01T23:59:59.000Z

    DJ, Hall EJ. Computed tomography-an increasing source ofin Patients with Computed Tomography-proven Stones JeffNon-contrast computed tomography (CT) is widely regarded as

  5. Verrucous carcinoma of the foot affecting the bone: Utility of the computed tomography scanner

    E-Print Network [OSTI]

    Garca-Gavn, J; Gonzlez-Vilas, D; Rodrguez-Pazos, L; Snchez-Aguilar, D; Toribio, J

    2010-01-01T23:59:59.000Z

    Frassica FJ, Fishman EK. Computed tomography of the bones ofbone: Utility of the computed tomography scanner J Garca-of bone invasion. Computed tomography (CT) showed a lytic

  6. Adherence to Head Computed Tomography Guidelines in the Setting of Mild Traumatic Brain Injury

    E-Print Network [OSTI]

    Jones, Landon A; Morley, Eric J; Grant, William D; Wojcik, Susan M; Paolo, William F

    2014-01-01T23:59:59.000Z

    Adherence to Head Computed Tomography Guidelines for Mildal Adherence to Head Computed Tomography Guidelines system,non-contrast head computed tomography (CT) in patients with

  7. Evaluation of a EMCCD detector for emission-transmission computed tomography

    E-Print Network [OSTI]

    Teo, B K; Shestakova, I; Sun, M; Barber, W C; Nagarkar, V V; Hasegawa, B H

    2006-01-01T23:59:59.000Z

    emission-transmission computed-tomography imaging system,for Emission-Transmission Computed Tomography B. K. Teo, I.sion-transmission computed tomography. The detector has an

  8. Characterization of Biological Effects of Computed Tomography by Assessing the DNA Damage Response

    E-Print Network [OSTI]

    Elgart, Shona Robin

    2014-01-01T23:59:59.000Z

    Brenner DJ, Hall EJ. Computed Tomography - An IncreasingSmith-Bindman R. Is Computed Tomography Safe? New Englandof X-ray Trends: Computed Tomography 2005 06 Preliminary

  9. Emergency Department Frequent User: Pilot Study of Intensive Case Management to Reduce Visits and Computed Tomography

    E-Print Network [OSTI]

    Grover, Casey A; Close, Reb JH; Villarreal, Kathy; Goldman, Lee M

    2010-01-01T23:59:59.000Z

    33. Brenner DJ, Hall EJ. Computed tomography an increasingReduce Visits and Computed Tomography Casey A. Grover* Rebof total images in all computed tomography (CT) scans during

  10. Yield and Clinical Predictors of Thoracic Spine Injury from Chest Computed Tomography for Blunt Trauma

    E-Print Network [OSTI]

    2014-01-01T23:59:59.000Z

    Injury from Chest Computed Tomography for Blunt Trauma Markthe use of chest computed tomography (CT), (CCT) in bluntinjury. 6,7 Chest computed tomography (CCT) evaluation for

  11. Coronary computed tomography angiography predicts subsequent cardiac outcome events: results of the Visipaque CCTA registry study.

    E-Print Network [OSTI]

    Budoff, MJ; Bloom, SA; Chow, BJ; Chandler, AB; Cole, JH

    2015-01-01T23:59:59.000Z

    Event CCTA= Coronary computed tomography angiography; MACE=CONFIRM (COroNary computed tomography angiography evaluationcalcium scoring and computed tomography angiography: current

  12. Statistical Estimation of Quantum Tomography Protocols Quality

    E-Print Network [OSTI]

    Yu. I. Bogdanov; G. Brida; M. Genovese; S. P. Kulik; E. V. Moreva; A. P. Shurupov

    2010-02-18T23:59:59.000Z

    A novel operational method for estimating the efficiency of quantum state tomography protocols is suggested. It is based on a-priori estimation of the quality of an arbitrary protocol by means of universal asymptotic fidelity distribution and condition number, which takes minimal value for better protocol. We prove the adequacy of the method both with numerical modeling and through the experimental realization of several practically important protocols of quantum state tomography.

  13. Metamorphic Rocks, Processes, and Resources Metamorphic rocks are rocks changed from one form to another by intense heat, intense pressure,

    E-Print Network [OSTI]

    Li, X. Rong

    important ­ Rising temperature causes water to be released from unstable minerals ­ Hot water very reactive refers to the temperature and pressure under which a rock was metamorphosed, considered low grade or high ­ If range exceeded, new mineral structures result ­ If temperature gets high enough, melting will occur

  14. A range muon tomography performance study for the detection of explosives

    SciTech Connect (OSTI)

    Cuellar, Leticia [Los Alamos National Laboratory; Borozdin, Konstantin N [Los Alamos National Laboratory; Chung, Andrew [Los Alamos National Laboratory; Nicolas, Hengartner W [Los Alamos National Laboratory; Morris, Christopher [Los Alamos National Laboratory; Schultz, Larry J [Los Alamos National Laboratory; Reimus, Nathaniel P [Los Alamos National Laboratory; Bacon, Jeffrey D [Los Alamos National Laboratory; Vogan - Mc Neil, Wendy [Los Alamos National Laboratory

    2010-01-01T23:59:59.000Z

    Soft cosmic ray tomography has been shown to successfully discriminate materials with various density levels due to their ability to deeply penetrate matter, allowing sensitivity to atomic number, radiation length and density. Because the multiple muon scattering signal from high Z-materials is very strong, the technology is well suited to the detection of the illicit transportation of special and radiological nuclear materials. In addition, a recent detection technique based on measuring the lower energy particles that do not traverse the material (range radiography), allows to discriminate low and medium Z-materials. This is shown in [4] using Monte Carlo simulations. More recently, using a mini muon tracker developed at Los Alamos National Laboratory, we performed various experiments to try out the radiation length technology. This paper presents the results from real experiments and evaluates the likelihood that soft cosmic ray tomography may be applied to detect high-explosives.

  15. Method and apparatus for measuring surface density of explosive and inert dust in stratified layers

    DOE Patents [OSTI]

    Sapko, Michael J. (Finleyville, PA); Perlee, Henry E. (Bethel Park, PA)

    1988-01-01T23:59:59.000Z

    A method for determining the surface density of coal dust on top of rock dust or rock dust on top of coal dust is disclosed which comprises directing a light source at either a coal or rock dust layer overlaying a substratum of the other, detecting the amount of light reflected from the deposit, generating a signal from the reflected light which is converted into a normalized output (V), and calculating the surface density from the normalized output. The surface density S.sub.c of coal dust on top of rock dust is calculated according to the equation: S.sub.c =1/-a.sub.c ln(V) wherein a.sub.c is a constant for the coal dust particles, and the surface density S.sub.r of rock dust on top of coal dust is determined by the equation: ##EQU1## wherein a.sub.r is a constant based on the properties of the rock dust particles. An apparatus is also disclosed for carrying out the method of the present invention.

  16. Esimation of field-scale thermal conductivities of unsaturated rocks from in-situ temperature data

    E-Print Network [OSTI]

    Mukhopadhyay, Sumit; Tsang, Yvonne W.; Birkholzer, Jens T.

    2008-01-01T23:59:59.000Z

    vicinity of the heat source, and rock temperature exceededand the dry rock near the heat source. The other differencesources, heat transfer takes place through the wet rock (see

  17. Seismic and Acoustic Investigations of Rock Fall Initiation, Processes, and Mechanics

    E-Print Network [OSTI]

    Zimmer, Valerie Louise

    2011-01-01T23:59:59.000Z

    systems and rock fall source and impact areas, it meters from a rock fall source area. The success possible to the rock fall source areas, spacing

  18. GEOTECHNICAL ASSESSMENT AND INSTRUMENTATION NEEDS FOR NUCLEAR WASTE ISOLATION IN CRYSTALLINE AND ARGILLACEOUS ROCKS SYMPOSIUM

    E-Print Network [OSTI]

    Authors, Various

    2011-01-01T23:59:59.000Z

    INSTRUMENTATION NEEDS FOR DETERMINING ROCK PROPERTIES..Acknowledgements ROCK PROPERTIES Participant Listing.OF MODELING IN ROCK PROPERTIES EVALUATION AND APPLICATION.

  19. Parameter estimation from flowing fluid temperature logging data in unsaturated fractured rock using multiphase inverse modeling

    E-Print Network [OSTI]

    Mukhopadhyay, S.

    2009-01-01T23:59:59.000Z

    have assumed the same rock properties for the entire packed-earlier, among the rock properties (permeability, porosity,However, these are not rock properties and are constrained

  20. Coupled thermohydromechanical analysis of a heater test in unsaturated clay and fractured rock at Kamaishi Mine

    E-Print Network [OSTI]

    Rutqvist, J.

    2011-01-01T23:59:59.000Z

    Kamaishi mine. Laboratory rock property tests. Power reactor5.2 Near field rock properties and fiactire geometand hydraulic rock properties, and hydraulic conditions

  1. An Integrated Modeling Analysis of Unsaturated Flow Patterns in Fractured Rock

    E-Print Network [OSTI]

    Wu, Yu-Shu; Lu, Guoping; Zhang, Keni; Pan, Lehua; Bodvarsson, Gudmundur S.

    2008-01-01T23:59:59.000Z

    because large contrasts in rock properties exist across thetransitional changes in rock properties argues that lateralthe distribution of rock properties within different units.

  2. On the relationship between stress and elastic strain for porous and fractured rock

    E-Print Network [OSTI]

    Liu, Hui-Hai

    2009-01-01T23:59:59.000Z

    the other associated rock properties. Important examples ofand/or hydraulic rock properties. We show that theand other rock mechanical/hydraulic properties, and these

  3. SEARCH FOR UNDERGROUND OPENINGS FOR IN SITU TEST FACILITIES IN CRYSTALLINE ROCK

    E-Print Network [OSTI]

    Wallenberg, H.A.

    2010-01-01T23:59:59.000Z

    to complie and correlate rock properties and preliminaryProject Table 1. Rock properties and project characteristicsof Information Rock properties - Bad Creek area Exhibit 1.

  4. Hot-dry-rock geothermal resource 1980

    SciTech Connect (OSTI)

    Heiken, G.; Goff, F.; Cremer, G. (ed.)

    1982-04-01T23:59:59.000Z

    The work performed on hot dry rock (HDR) geothermal resource evaluation, site characterization, and geophysical exploration techniques is summarized. The work was done by region (Far West, Pacific Northwest, Southwest, Rocky Mountain States, Midcontinent, and Eastern) and limited to the conterminous US.

  5. Storage capacity in hot dry rock reservoirs

    DOE Patents [OSTI]

    Brown, Donald W. (Los Alamos, NM)

    1997-01-01T23:59:59.000Z

    A method of extracting thermal energy, in a cyclic manner, from geologic strata which may be termed hot dry rock. A reservoir comprised of hot fractured rock is established and water or other liquid is passed through the reservoir. The water is heated by the hot rock, recovered from the reservoir, cooled by extraction of heat by means of heat exchange apparatus on the surface, and then re-injected into the reservoir to be heated again. Water is added to the reservoir by means of an injection well and recovered from the reservoir by means of a production well. Water is continuously provided to the reservoir and continuously withdrawn from the reservoir at two different flow rates, a base rate and a peak rate. Increasing water flow from the base rate to the peak rate is accomplished by rapidly decreasing backpressure at the outlet of the production well in order to meet periodic needs for amounts of thermal energy greater than a baseload amount, such as to generate additional electric power to meet peak demands. The rate of flow of water provided to the hot dry rock reservoir is maintained at a value effective to prevent depletion of the liquid

  6. Storage capacity in hot dry rock reservoirs

    DOE Patents [OSTI]

    Brown, D.W.

    1997-11-11T23:59:59.000Z

    A method is described for extracting thermal energy, in a cyclic manner, from geologic strata which may be termed hot dry rock. A reservoir comprised of hot fractured rock is established and water or other liquid is passed through the reservoir. The water is heated by the hot rock, recovered from the reservoir, cooled by extraction of heat by means of heat exchange apparatus on the surface, and then re-injected into the reservoir to be heated again. Water is added to the reservoir by means of an injection well and recovered from the reservoir by means of a production well. Water is continuously provided to the reservoir and continuously withdrawn from the reservoir at two different flow rates, a base rate and a peak rate. Increasing water flow from the base rate to the peak rate is accomplished by rapidly decreasing backpressure at the outlet of the production well in order to meet periodic needs for amounts of thermal energy greater than a baseload amount, such as to generate additional electric power to meet peak demands. The rate of flow of water provided to the hot dry rock reservoir is maintained at a value effective to prevent depletion of the liquid inventory of the reservoir. 4 figs.

  7. Damage and plastic deformation of reservoir rocks

    E-Print Network [OSTI]

    Ze'ev, Reches

    Damage and plastic deformation of reservoir rocks: Part 2. Propagation of a hydraulic fracture Seth fracture and fault mechanics, fluid flow in fractured reservoirs, and geome- chanics in nonconventional the development of complex hydraulic fractures (HFs) that are commonly ob- served in the field and in experiments

  8. Transfer of hot dry rock technology

    SciTech Connect (OSTI)

    Smith, M.C.

    1985-11-01T23:59:59.000Z

    The Hot Dry Rock Geothermal Energy Development Program has focused worldwide attention on the facts that natural heat in the upper part of the earth's crust is an essentially inexhaustible energy resource which is accessible almost everywhere, and that practical means now exist to extract useful heat from the hot rock and bring it to the earth's surface for beneficial use. The Hot Dry Rock Program has successfully constructed and operated a prototype hot, dry rock energy system that produced heat at the temperatures and rates required for large-scale space heating and many other direct uses of heat. The Program is now in the final stages of constructing a larger, hotter system potentially capable of satisfying the energy requirements of a small, commercial, electrical-generating power plant. To create and understand the behavior of such system, it has been necessary to develop or support the development of a wide variety of equipment, instruments, techniques, and analyses. Much of this innovative technology has already been transferred to the private sector and to other research and development programs, and more is continuously being made available as its usefulness is demonstrated. This report describes some of these developments and indicates where this new technology is being used or can be useful to industry, engineering, and science.

  9. Radiocarbon dating of ancient rock paintings

    SciTech Connect (OSTI)

    Ilger, W.A.; Hyman, M.; Rowe, M.W. [Texas A and M Univ., College Station, TX (United States). Dept. of Chemistry; Southon, J. [Lawrence Livermore National Lab., CA (United States)

    1995-06-20T23:59:59.000Z

    This report presents progress made on a technique for {sup 14}C dating pictographs. A low-temperature oxygen plasma is used coupled with high-vacuum technologies to selectively remove C-containing material in the paints without contamination from inorganic carbon from rock substrates or accretions.

  10. Life cycle assessment of a rock crusher

    SciTech Connect (OSTI)

    Landfield, A.H.; Karra, V.

    1999-07-01T23:59:59.000Z

    Nordberg, Inc., a capital equipment manufacturer, performed a Life Cycle Assessment study on its rock crusher to aid in making decisions on product design and energy improvements. Life Cycle Assessment (LCA) is a relatively new cutting edge environmental tool recently standardized by ISO that provides quantitative environmental and energy data on products or processes. This paper commences with a brief introduction to LCA and presents the system boundaries, modeling and assumptions for the rock crusher study. System boundaries include all life major cycle stages except manufacturing and assembly of the crusher. Results of the LCA show that over 99% of most of the flows into and out of the system may be attributed to the use phase of the rock crusher. Within the use phase itself, over 95% of each environmental inflow and outflow (with some exceptions) are attributed to electricity consumption, and not the replacement of spares/wears or lubricating oil over the lifetime of the crusher. Results tables and charts present selected environmental flows, including CO{sub 2} NOx, SOx, particulate matter, and energy consumption, for each of the rock crusher life cycle stages and the use phase. This paper aims to demonstrate the benefits of adopting a rigorous scientific approach to assess energy and environmental impacts over the life cycle of capital equipment. Nordberg has used these results to enhance its engineering efforts toward developing an even more energy efficient machine to further progress its vision of providing economic solutions to its customers by reducing the crusher operating (mainly electricity) costs.

  11. F]-Fluorodeoxyglucose Positron Emission Tomography and Computed Tomography in Response

    E-Print Network [OSTI]

    Hemminki, Akseli

    , and [18 F]-FDG-uptake was quantitated with small animal PET/CT. Second, we describe a retrospective molecules. Here we investigated the prognostic utility of CT and [18 F]-fluor- odeoxyglucose (FDG) positron[18 F]-Fluorodeoxyglucose Positron Emission Tomography and Computed Tomography in Response

  12. Omni-tomography / Multi-tomography Integrating Multiple Modalities for Simultaneous Imaging

    E-Print Network [OSTI]

    Wang, Ge

    registration and combined acquisition on PET-CT, PET-MRI and other hybrid scanners. There are intrinsic relevant imaging mechanisms such as CT, MRI, PET, SPECT, US, optical, and possibly more. In this paper applications of omni-tomography. Key Words: Tomography, CT, MRI, PET, SPECT, US imaging, optical imaging

  13. Rock Classification in Organic Shale Based on Petrophysical and Elastic Rock Properties Calculated from Well Logs

    E-Print Network [OSTI]

    Aranibar Fernandez, Alvaro A

    2015-01-05T23:59:59.000Z

    classification method was then applied to the field examples from the Haynesville shale and Woodford shales for rock classification. The estimates of porosity, TOC, bulk modulus, shear modulus, and volumetric concentrations of minerals were obtained...

  14. Rock Bands/Rock Brands: Mediation and Musical Performance in Post-liberalization Bangalore

    E-Print Network [OSTI]

    Coventry, Chloe Louise

    2013-01-01T23:59:59.000Z

    2009 PolyGram advertisement Coca-cola and MTV contest PepsiNokia, Pepsi, Seagrams, and Coca Cola sponsored rock showsGroup and Brigade Group, Coca-Cola, and the biotechnology

  15. FACTORS IN THE DESIGN OF A ROCK MECHANICS CENTRIFUGE FOR STRONG ROCK

    E-Print Network [OSTI]

    Clark, George B

    1984-01-01T23:59:59.000Z

    1 . Capacit i es of known centrifuges and v proposed SoftSolla I rock mechanics centrifuge r, ---------1~ --- dxB. , (1980), Geotechnical centrifuges for model studies and

  16. Overview of conservation treatments applied to rock glyph archaeological sites

    E-Print Network [OSTI]

    Dandridge, Debra E

    2000-01-01T23:59:59.000Z

    Rock glyphs, ubiquitously referred to as rock art, are often the most highly visible components of archaeological sites. Such artifacts, therefore, are most prone to deterioration and degradation from human caused and natural elements...

  17. Study of Acid Response of Qatar Carbonate Rocks

    E-Print Network [OSTI]

    Wang, Zhaohong

    2012-02-14T23:59:59.000Z

    of understanding of Qatar carbonate especially Middle East carbonates and the abundance of Middle East carbonate reservoirs is the main motivation behind this study. This work is an experimental study to understand the acid response to Qatar rocks in rocks...

  18. Modeling of crack initiation, propagation and coalescence in rocks

    E-Print Network [OSTI]

    Gonalves da Silva, Bruno Miguel

    2009-01-01T23:59:59.000Z

    Natural or artificial fracturing of rock plays a very important role in geologic processes and for engineered structures in and on rock. Fracturing is associated with crack initiation, propagation and coalescence, which ...

  19. Inversion of seismic attributes for petrophysical parameters and rock facies

    E-Print Network [OSTI]

    Shahraeeni, Mohammad Sadegh

    2011-01-01T23:59:59.000Z

    Prediction of rock and fluid properties such as porosity, clay content, and water saturation is essential for exploration and development of hydrocarbon reservoirs. Rock and fluid property maps obtained from such predictions ...

  20. Isotopic Analysis- Rock At Valles Caldera - Sulphur Springs Geothermal...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Isotopic Analysis- Rock At Valles Caldera - Sulphur Springs Geothermal Area (Phillips, 2004)...

  1. Isotopic Analysis- Rock At Valles Caldera - Sulphur Springs Geothermal...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Isotopic Analysis- Rock At Valles Caldera - Sulphur Springs Geothermal Area (Ito & Tanaka, 1995)...

  2. Isotopic Analysis- Rock At Valles Caldera - Sulphur Springs Area...

    Open Energy Info (EERE)

    navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Isotopic Analysis- Rock At Valles Caldera - Sulphur Springs Area (Ito & Tanaka, 1995) Exploration...

  3. Fourier-based magnetic induction tomography for mapping resistivity

    SciTech Connect (OSTI)

    Puwal, Steffan; Roth, Bradley J. [Department of Physics, Oakland University, Rochester, Michigan 48309 (United States)

    2011-01-01T23:59:59.000Z

    Magnetic induction tomography is used as an experimental tool for mapping the passive electromagnetic properties of conductors, with the potential for imaging biological tissues. Our numerical approach to solving the inverse problem is to obtain a Fourier expansion of the resistivity and the stream functions of the magnetic fields and eddy current density. Thus, we are able to solve the inverse problem of determining the resistivity from the applied and measured magnetic fields for a two-dimensional conducting plane. When we add noise to the measured magnetic field, we find the fidelity of the measured to the true resistivity is quite robust for increasing levels of noise and increasing distances of the applied and measured field coils from the conducting plane, when properly filtered. We conclude that Fourier methods provide a reliable alternative for solving the inverse problem.

  4. A CONSTITUTIVE MODEL TO PREDICT THE HYDROMECHANICAL BEHAVIOUR OF ROCK

    E-Print Network [OSTI]

    Aubertin, Michel

    in the presence of water to better assess the stability of rock structures under many situations. The accurate conditions. A rock mass behaviour can also be influenced by the water flow and ensuing pore pressure. For example, a previously stable rock structure can become unstable with an increase of water pressure inside

  5. Sigma Xi, The Scientific Research Society Rock Varnish

    E-Print Network [OSTI]

    Dorn, Ron

    Sigma Xi, The Scientific Research Society Rock Varnish Author(s): Ronald I. Dorn Source: American;Rock Varnish Over thousandsofyears,a thincoatingofclay,cementedtorocksbymanganese and iron that appeared "smooth, black, and as ifcoated with plumbago." Indian legends explained that these rocks had been

  6. Technical Note Evaluation of mechanical rock properties using a Schmidt

    E-Print Network [OSTI]

    Ze'ev, Reches

    Technical Note Evaluation of mechanical rock properties using a Schmidt Hammer O. Katza, b, c, *, Z, 91904, Israel b Geological Survey of Israel, 30 Malkhe Yisrael St., Jerusalem, 95501, Israel c Rock of concrete hardness [1], and was later used to estimate rock strength [2,3]. It con- sists of a spring

  7. A NEW MODEL FOR PERFORMANCE PREDICTION OF HARD ROCK TBMS.

    E-Print Network [OSTI]

    TBMs. The model uses information on the rock properties and cutting geometry to calculate TBM rate on data collected in the field and is merely a regression between machine parameters, rock properties is introduced to provide an estimate of disc cutting forces as a function of rock properties and the cutting

  8. Apollo Rock Reveals Moon Had Molten Core | Universe Additional Resources

    E-Print Network [OSTI]

    Weiss, Benjamin P.

    Apollo Rock Reveals Moon Had Molten Core | Universe Today Subscribe Podcast Home Additional Apollo Rock Reveals Moon Had Molten Core Written by Nancy Atkinson If you're new here, you may want to subscribe to my RSS feed. Thanks for visiting! Apollo Rock Reveals Moon Had Molten Core | Universe Today

  9. ROCK PROPERTIES AND THEIR EFFECT ON THERMALLY-INDUCED DISPLACEMENTS AND STRESSES

    E-Print Network [OSTI]

    Chan, T.

    2010-01-01T23:59:59.000Z

    of laboratory rock property measurements. ACKNOWLEDGEMENT10517 u>ve-'zz&\\--lo ROCK PROPERTIES AND THEIR EFFECT OHin values i for the rock properties for an 1n-s1tu rock mass

  10. GEOL 103 Writing Assignment 2. Rock Cycle 1. How do each of the three major rock types form? Include the source of the material and the rock-forming

    E-Print Network [OSTI]

    Kirby, Carl S.

    ? Include the source of the material and the rock-forming process. Igneous rocks form from the hiGEOL 103 Writing Assignment 2. Rock Cycle 1. How do each of the three major rock types form-temperature (650-1200 C) melting of other rocks (ign. mmorphic, or sed), following by cooling, possibly

  11. Scanning microwave-induced thermoacoustic tomography: Signal, resolution, and contrast

    E-Print Network [OSTI]

    Wang, Lihong

    Scanning microwave-induced thermoacoustic tomography: Signal, resolution, and contrast Geng Ku Scanning thermoacoustic tomography was explored in the microwave region of the electromagnetic spectrum ultrasonic transducer detected the time-resolved thermoacoustic signals. Based on the microwave

  12. Photoacoustic and thermoacoustic tomography: system development for biomedical applications

    E-Print Network [OSTI]

    Ku, Geng

    2006-04-12T23:59:59.000Z

    Photoacoustic tomography (PAT), as well as thermoacoustic tomography (TAT), utilize electromagnetic radiation in its visible, near infrared, microwave, and radiofrequency forms, respectively, to induce acoustic waves in biological tissues...

  13. GEOTECHNICAL ASSESSMENT AND INSTRUMENTATION NEEDS FOR NUCLEAR WASTE ISOLATION IN CRYSTALLINE AND ARGILLACEOUS ROCKS SYMPOSIUM

    E-Print Network [OSTI]

    Authors, Various

    2011-01-01T23:59:59.000Z

    Characterization of Rock Masses Structural GeologicalCharacterization of Rock Masses . 5.2.1 Structural Geological

  14. Seismic and Acoustic Investigations of Rock Fall Initiation, Processes, and Mechanics

    E-Print Network [OSTI]

    Zimmer, Valerie Louise

    2011-01-01T23:59:59.000Z

    Happy Isles and the 1999 Glacier Point rock falls, there was an attempt to monitor rock fall in Yosemite Valley

  15. A Phased Array Approach to Rock Blasting

    SciTech Connect (OSTI)

    Leslie Gertsch; Jason Baird

    2006-07-01T23:59:59.000Z

    A series of laboratory-scale simultaneous two-hole shots was performed in a rock simulant (mortar) to record the shock wave interference patterns produced in the material. The purpose of the project as a whole was to evaluate the usefulness of phased array techniques of blast design, using new high-precision delay technology. Despite high-speed photography, however, we were unable to detect the passage of the shock waves through the samples to determine how well they matched the expected interaction geometry. The follow-up mine-scale tests were therefore not conducted. Nevertheless, pattern analysis of the vectors that would be formed by positive interference of the shockwaves from multiple charges in an ideal continuous, homogeneous, isotropic medium indicate the potential for powerful control of blast design, given precise characterization of the target rock mass.

  16. Pore fluid effects on seismic velocity in anisotropic rocks

    SciTech Connect (OSTI)

    Mukerji, T.; Mavko, G. (Stanford Univ., CA (United States). Dept. of Geophysics)

    1994-02-01T23:59:59.000Z

    A simple new technique predicts the high- and low-frequency saturated velocities in anisotropic rocks entirely in terms of measurable dry rock properties without the need for idealized crack geometries. Measurements of dry velocity versus pressure and porosity versus pressure contain all of the necessary information for predicting the frequency-dependent effects of fluid saturation. Furthermore, these measurements automatically incorporate all pore interaction, so there is no limitation to low crack density. The velocities are found to depend on five key interrelated variables: frequency, the distribution of compliant crack-like porosity, the intrinsic or noncrack anisotropy, fluid viscosity and compressibility, and effective pressure. The sensitivity of velocities to saturation is generally greater at high frequencies than low frequencies. The magnitude of the differences from dry to saturated and from low frequency to high frequency is determined by the compliant or crack-like porosity. Predictions of saturated velocities based on dry data for sandstone and granite show that compressional velocities generally increase with saturation and with frequency. However, the degree of compressional wave anisotropy may either increase or decrease upon saturation depending on the crack distribution, the effective pressure, and the frequency at which the measurements are made. Shear-wave velocities can either increase or decrease with saturation, and the degree of anisotropy depends on the microstructure, pressure, and frequency. Consequently great care must be taken when interpreting observed velocity anisotropy for measurements at low frequencies, typical of in situ observations, will generally be different from those at high frequencies, typical of the laboratory.

  17. Low Pore Connectivity in Natural Rock

    SciTech Connect (OSTI)

    Hu, Qinhong; Ewing, Robert P.; Dultz, Stefan

    2012-05-15T23:59:59.000Z

    As repositories for CO? and radioactive waste, as oil and gas reservoirs, and as contaminated sites needing remediation, rock formations play a central role in energy and environmental management. The connectivity of the rock's porespace strongly affects fluid flow and solute transport. This work examines pore connectivity and its implications for fluid flow and chemical transport. Three experimental approaches (imbibition, tracer concentration profiles, and imaging) were used in combination with network modeling. In the imbibition results, three types of imbibition slope [log (cumulative imbibition) vs. log (imbibition time)] were found: the classical 0.5, plus 0.26, and 0.26 transitioning to 0.5. The imbibition slope of 0.26 seen in Indiana sandstone, metagraywacke, and Barnett shale indicates low pore connectivity, in contrast to the slope of 0.5 seen in the well-connected Berea sandstone. In the tracer profile work, rocks exhibited different distances to the plateau porosity, consistent with the pore connectivity from the imbibition tests. Injection of a molten metal into connected pore spaces, followed by 2-D imaging of the solidified alloy in polished thin sections, allowed direct assessment of pore structure and lateral connection in the rock samples. Pore-scale network modeling gave results consistent with measurements, confirming pore connectivity as the underlying cause of both anomalous behaviors: imbibition slope not having the classical value of 0.5, and accessible porosity being a function of distance from the edge. A poorly connected porespace will exhibit anomalous behavior in fluid flow and chemical transport, such as a lower imbibition slope (in airwater system) and diffusion rate than expected from classical behavior.

  18. Rock Chalk Report, May 7, 2014

    E-Print Network [OSTI]

    2014-05-07T23:59:59.000Z

    Trouble seeing something? view it online or To unsubscribe, click here or send an email to: unsubscribe- 87@pacmail.em.marketinghq.net. May 7, 2014 Rock Chalk Report The Official Newsletter of Kansas Athletics... an email to: unsubscribe-87@pacmail.em.marketinghq.net. 2014, University of Kansas. The team names, logos and uniform designs are registered trademarks of the teams indicated. No logos, photographs or graphics in this email may be reproduced without...

  19. Hot Dry Rock Geothermal Energy Development Program

    SciTech Connect (OSTI)

    Smith, M.C.; Hendron, R.H.; Murphy, H.D.; Wilson, M.G.

    1989-12-01T23:59:59.000Z

    During Fiscal Year 1987, emphasis in the Hot Dry Rock Geothermal Energy Development Program was on preparations for a Long-Term Flow Test'' of the Phase II'' or Engineering'' hot dry rock energy system at Fenton Hill, New Mexico. A successful 30-day flow test of the system during FY86 indicated that such a system would produce heat at a temperature and rate that could support operation of a commercial electrical power plant. However, it did not answer certain questions basic to the economics of long-term operation, including the rate of depletion of the thermal reservoir, the rate of water loss from the system, and the possibility of operating problems during extended continuous operation. Preparations for a one-year flow test of the system to answer these and more fundamental questions concerning hot dry rock systems were made in FY87: design of the required surface facilities; procurement and installation of some of their components; development and testing of slimline logging tools for use through small-diameter production tubing; research on temperature-sensitive reactive chemical tracers to monitor thermal depletion of the reservoir; and computer simulations of the 30-day test, extended to modeling the planned Long-Term Flow Test. 45 refs., 34 figs., 5 tabs.

  20. Gage for measuring displacements in rock samples

    DOE Patents [OSTI]

    Holcomb, D.J.; McNamee, M.J.

    1985-07-18T23:59:59.000Z

    A gage for measuring diametral displacement within a rock sample for use in a rock mechanics laboratory and in the field, comprises a support ring housing a linear variable differential transformer (LVDT), a mounting screw, and a leaf spring. The mounting screw is adjustable and defines a first point of contact with the rock sample. The leaf spring has opposite ends fixed to the inner periphery of the mounting ring. An intermediate portion of the leaf spring projecting radially inward from the ring is formed with a dimple defining a second point of contact with the sample. The first and second points of contact are diametrically opposed to each other. The LVDT is mounted in the ring with its axis parallel to the line of measurement and its core rod received in the dimple of the leaf spring. Any change in the length of the line between the first and second support points is directly communicated to the LVDT. The leaf spring is rigid to completely support lateral forces so that the LVDT is free of all load for improved precision.

  1. Squirt flow in fully saturated rocks

    SciTech Connect (OSTI)

    Dvorkin, J.; Mavko, G.; Nur, A. [Stanford Univ., CA (United States). Dept. of Geophysics] [Stanford Univ., CA (United States). Dept. of Geophysics

    1995-01-01T23:59:59.000Z

    The authors estimate velocity/frequency dispersion and attenuation in fully saturated rocks by employing the squirt-flow mechanism of solid-fluid interaction. In this model, pore fluid is squeezed from thin soft cracks into the surrounding large pores. Information about the compliance of these soft cracks at low confining pressures is extracted from high-pressure velocity data. The frequency dependence of squirt-induced pressure in the soft cracks is linked with the porosity and permeability of the soft pore space, and the characteristic squirt-flow length. These unknown parameters are combined into one expression that is assumed to be a fundamental rock property that does not depend on frequency. The appropriate value of this expression for a given rock can be found by matching the authors theoretical predictions with the experimental measurements of attenuation or velocity. The low-frequency velocity limits, as given by their model, are identical to those predicted by Gassmann`s formula. The high-frequency limits may significant exceed those given by the Biot theory: the high-frequency frame bulk modulus is close to that measured at high confining pressure. They have applied their model to D`Euville Limestone, Navajo Sandstone, and Westerly Granite. The model realistically predicts the observed velocity/frequency dispersion, and attenuation.

  2. Evaluation of Turbine Blades Using Computed Tomography

    E-Print Network [OSTI]

    C. Muralidhar; S. N. Lukose; M. P. Subramanian

    2006-01-01T23:59:59.000Z

    Turbine blades are high value castings having complex internal geometry. Computed Tomography has been employed on Turbine blades for finding out defects and internal details. The wall thickness, rib thickness and radius of curvature are measured from the CT slices. The discontinuities including blockages of cooling passages in the cast material can be detected. 3D visualization of the turbine blade provides in extracting its internal features including inaccessible areas nondestructively, which is not possible through conventional NDE methods. The salient features for evaluation of turbine blades using Tomography are brought out.

  3. Seismic Tomography: Definitions Lapo Boschi (lapo@erdw.ethz.ch)

    E-Print Network [OSTI]

    Boschi, Lapo

    Tomography Seismic tomography is the science of interpreting seismic measurements (seismograms) to derive; that is to say, solve the seismological inverse problem. Seismic data and their interpretation Seismic stationsSeismic Tomography: Definitions Lapo Boschi (lapo@erdw.ethz.ch) September 14, 2009 Seismic

  4. PHOTOACOUSTIC AND THERMOACOUSTIC TOMOGRAPHY WITH AN UNCERTAIN WAVE SPEED

    E-Print Network [OSTI]

    Uhlmann, Gunther

    PHOTOACOUSTIC AND THERMOACOUSTIC TOMOGRAPHY WITH AN UNCERTAIN WAVE SPEED LAURI OKSANEN AND GUNTHER UHLMANN Abstract. We consider the mathematical model of photoacoustic and thermoacoustic tomography. In Thermoacoustic tomography (TAT), see e.g. [8], low frequency microwaves, with wavelengths on the order of 1m

  5. THERMOACOUSTIC TOMOGRAPHY WITH AN ARBITRARY ELLIPTIC OPERATOR MICHAEL V. KLIBANOV

    E-Print Network [OSTI]

    1 THERMOACOUSTIC TOMOGRAPHY WITH AN ARBITRARY ELLIPTIC OPERATOR MICHAEL V. KLIBANOV Abstract. Thermoacoustic tomography is a term for the inverse problem of determining of one of initial conditions. In thermoacoustic tomography (TAT) a short radio frequency pulse is sent in a biological tissue [1, 9]. Some energy

  6. Application of a nudging technique to thermoacoustic tomography

    E-Print Network [OSTI]

    Boyer, Edmond

    Application of a nudging technique to thermoacoustic tomography Xavier Bonnefond and Sbastien Marinesque December 3, 2011 Abstract ThermoAcoustic Tomography (TAT) is a promising, non invasive, medical inversion method. 1 Introduction ThermoAcoustic Tomography (TAT) is a hybrid imaging technique that uses

  7. Review of Parallel Computing Techniques for Computed Tomography Image Reconstruction

    E-Print Network [OSTI]

    Wang, Ge

    Review of Parallel Computing Techniques for Computed Tomography Image Reconstruction Jun Ni1, 3 representative analytic and iterative reconstruction algorithms for X-ray computed tomography (CT), we address X-ray computed tomography (CT) is one of the most important non-invasive medical imaging techniques

  8. Shape Filtering for False Positive Reduction at Computed Tomography Colonography

    E-Print Network [OSTI]

    Whelan, Paul F.

    Shape Filtering for False Positive Reduction at Computed Tomography Colonography Abhilash A) in the automatic detection of colorectal polyps at Computer Aided Detection in Computed Tomography Colonography of the images of the colon obtained using a Computed Tomography (CT) examination of the abdominal region

  9. Edge-Localized Iterative Reconstruction for Computed Tomography

    E-Print Network [OSTI]

    1 Edge-Localized Iterative Reconstruction for Computed Tomography Zhou Yu Student Member, IEEE) can greatly improve the quality of computed tomography (CT) images. In particular, MBR can recover at significantly reduced computational cost. Index Terms--Computed tomography, model based reconstruc- tion

  10. Roadmap: Radiologic Imaging Sciences -Computed Tomography (with AAS Radiologic Technology) -

    E-Print Network [OSTI]

    Sheridan, Scott

    Roadmap: Radiologic Imaging Sciences - Computed Tomography (with AAS Radiologic Technology] Note: Admission to the program is required to enroll in RIS courses RIS 34084 Computed Tomography and Magnetic Resonance Imaging Sectional Anatomy I 2 C RIS 44021 Patient Management in Computed Tomography 2

  11. Edge-Localized Iterative Reconstruction for Computed Tomography

    E-Print Network [OSTI]

    Edge-Localized Iterative Reconstruction for Computed Tomography Zhou Yu Student Member, IEEE, Jean the quality of computed tomography (CT) images. In particular, MBR can recover fine details and small features reduced computational cost. Index Terms--Computed tomography, model based reconstruc- tion, coordinate

  12. Kinetic Model for Motion Compensation in Computed Tomography

    E-Print Network [OSTI]

    1 Kinetic Model for Motion Compensation in Computed Tomography Zhou Yu, Jean-Baptiste Thibault- gorithms have recently been applied to computed tomography and demonstrated superior image quality. MBIR to computed tomography and demonstrated superior image quality performance [1], [2], [3]. These methods

  13. Proton Computed Tomography and Constructing Tracker Boards Gatlin Bredeson

    E-Print Network [OSTI]

    Belanger, David P.

    1 ABSTRACT Proton Computed Tomography and Constructing Tracker Boards By Gatlin Bredeson Scientists tomography (xCT) with proton computed tomography (pCT). During a CT scan, protons pass through a phantom University to build tracker boards to assist in creating a system that seeks to replace X-ray computed

  14. Pair densities in density functional theory

    E-Print Network [OSTI]

    Chen, Huajie

    2015-01-01T23:59:59.000Z

    The exact interaction energy of a many-electron system is determined by the electron pair density, which is not well-approximated in standard Kohn-Sham density functional models. Here we study the (complicated but well-defined) exact universal map from density to pair density. We show that many common functionals, including the most basic version of the LDA (Dirac exchange with no correlation contribution), arise from particular approximations of this map. We develop an algorithm to compute the map numerically, and apply it to one-parameter families {a*rho(a*x)} of one-dimensional homogeneous and inhomogeneous single-particle densities. We observe that the pair density develops remarkable multiscale patterns which strongly depend on both the particle number and the "width" 1/a of the single-particle density. The simulation results are confirmed by rigorous asymptotic results in the limiting regimes a>>1 and a<<1. For one-dimensional homogeneous systems, we show that the whole spectrum of patterns is rep...

  15. Merguerian, Charles; and Ozdemir, Levent, 2003, Rock Mass Properties and Hard Rock TBM Penetration Rate Investigations, Queens Tunnel Complex, NYC Water Tunnel #3, Stage 2: p.

    E-Print Network [OSTI]

    Merguerian, Charles

    Merguerian, Charles; and Ozdemir, Levent, 2003, Rock Mass Properties and Hard Rock TBM Penetration Properties and Hard Rock TBM Penetration Rate Investigations, Queens Tunnel Complex, NYC Water Tunnel #3 quantification that the rock mass exhibited an unusually high degree of toughness and rock directional properties

  16. Source rock evaluation, oil-source rock correlation, and kinetic modeling - San Juan Sag, CO

    SciTech Connect (OSTI)

    Clayton, J.L. (Geological survey, Denver, CO (USA)); Gries, R.R.

    1990-05-01T23:59:59.000Z

    Recently, oil and gas shows have been reported in Cretaceous and Tertiary rocks of the San Juan sag, and minor oil production was established from volcanic rocks (Kirby Petroleum 1 Jynnifer well, Sec. 9, T40N, R5E.). Potential source rocks present in the San Juan sag are the upper and lower (including the Niobrara Member) Mancos Shale (Upper Cretaceous). The combined upper and lower Mancos Shale is about 666 m thick and contains between about 0.5 and 5.5% organic carbon, although most values are between about 1.5 and 2.0%. The Niobrara Member of the lower Mancos Shale has the highest overall organic matter content in the section (organic carbon averages <2.0%). Pyrolysis and solvent extraction data (typically 2,000-6,000 and 1,000-4,000 ppm, respectively) indicate that the upper and lower Mancos Shale and the Niobrara Member are all good potential source rocks for oil and gas. Oil-source rock correlations using gas chromatography, mass spectrometry, and stable carbon isotope ratios indicate that the upper Mancos Shale is the most likely source for the oil produced from the 1 Jynnifer discovery well. The source of the oil produced from the nearby Gramps field is less certain, but may be the lower Mancos Shale or Niobrara Member. The hydrocarbon generation history of the San Juan sag is complex because of highly variable heat flow in the area caused by Oligocene volcanism. Sills have caused thermal alteration of organic matter in shales on a local scale, and larger volcanic bodies may have produced proportionality larger thermal effects. More regional heating by larger volcanic bodies is an important factor in the oil generation history of the area. The authors have constructed kinetic models at several locations in the area to estimate the timing and amount of hydrocarbon products generated from the source rocks. The main phase of oil and gas generation and expulsion occurred during the Oligocene.

  17. Global transition zone tomography Jeroen Ritsema1

    E-Print Network [OSTI]

    Ritsema, Jeroen

    Global transition zone tomography Jeroen Ritsema1 and Hendrik Jan van Heijst Seismological on accurate models of seismic velocity variation in the upper mantle transition zone (4001000 km depth. Such data provide new global transition zone constraints. We combined more than a million measurements

  18. Reconstruction in tomography with diffracting sources

    E-Print Network [OSTI]

    Xu, Yuan

    2005-02-17T23:59:59.000Z

    Homogeneous Model . . . . . . . . . . . . . . . . . . . 22 III LIMITED-VIEW THERMOACOUSTIC TOMOGRAPHY1 . . . 24 A. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . 24 1. Analysis of Singularities in Circular Radon Trans- form and Limited-view TAT... . . . . . . . . . . . . . . 26 a. Circular Radon Transform . . . . . . . . . . . . . 26 b. TAT . . . . . . . . . . . . . . . . . . . . . . . . . 27 c. Reconstruction Methods . . . . . . . . . . . . . . 30 2. Numerical Implementation . . . . . . . . . . . . . . . 35 viii CHAPTER...

  19. Single-Shot Quantum Process Tomography

    E-Print Network [OSTI]

    Abhishek Shukla; T. S. Mahesh

    2014-05-27T23:59:59.000Z

    The standard procedure for quantum process tomography (QPT) involves applying the quantum process on a system initialized in each of a complete set of orthonormal states. The corresponding outputs are then characterized by quantum state tomography (QST), which itself requires the measurement of non-commuting observables realized by independent experiments on identically prepared system states. Thus QPT procedure demands a number of independent measurements, and moreover, this number increases rapidly with the size of the system. However, the total number of independent measurements can be greatly reduced with the availability of ancilla qubits. Ancilla assisted process tomography (AAPT) has earlier been shown to require a single QST of system-ancilla space. Ancilla assisted quantum state tomography (AAQST) has also been shown to perform QST in a single measurement. Here we combine AAPT with AAQST to realize a `single-shot QPT' (SSPT), a procedure to characterize a general quantum process in a single collective measurement of a set of commuting observables. We demonstrate experimental SSPT by characterizing several single-qubit processes using a three-qubit NMR quantum register. Furthermore, using the SSPT procedure we experimentally characterize the twirling process and compare the results with theory.

  20. Simulation of CO2 Sequestration at Rock Spring Uplift, Wyoming: Heterogeneity and Uncertainties in Storage Capacity, Injectivity and Leakage

    SciTech Connect (OSTI)

    Deng, Hailin [Los Alamos National Laboratory; Dai, Zhenxue [Los Alamos National Laboratory; Jiao, Zunsheng [Wyoming State Geological Survey; Stauffer, Philip H. [Los Alamos National Laboratory; Surdam, Ronald C. [Wyoming State Geological Survey

    2011-01-01T23:59:59.000Z

    Many geological, geochemical, geomechanical and hydrogeological factors control CO{sub 2} storage in subsurface. Among them heterogeneity in saline aquifer can seriously influence design of injection wells, CO{sub 2} injection rate, CO{sub 2} plume migration, storage capacity, and potential leakage and risk assessment. This study applies indicator geostatistics, transition probability and Markov chain model at the Rock Springs Uplift, Wyoming generating facies-based heterogeneous fields for porosity and permeability in target saline aquifer (Pennsylvanian Weber sandstone) and surrounding rocks (Phosphoria, Madison and cap-rock Chugwater). A multiphase flow simulator FEHM is then used to model injection of CO{sub 2} into the target saline aquifer involving field-scale heterogeneity. The results reveal that (1) CO{sub 2} injection rates in different injection wells significantly change with local permeability distributions; (2) brine production rates in different pumping wells are also significantly impacted by the spatial heterogeneity in permeability; (3) liquid pressure evolution during and after CO{sub 2} injection in saline aquifer varies greatly for different realizations of random permeability fields, and this has potential important effects on hydraulic fracturing of the reservoir rock, reactivation of pre-existing faults and the integrity of the cap-rock; (4) CO{sub 2} storage capacity estimate for Rock Springs Uplift is 6614 {+-} 256 Mt at 95% confidence interval, which is about 36% of previous estimate based on homogeneous and isotropic storage formation; (5) density profiles show that the density of injected CO{sub 2} below 3 km is close to that of the ambient brine with given geothermal gradient and brine concentration, which indicates CO{sub 2} plume can sink to the deep before reaching thermal equilibrium with brine. Finally, we present uncertainty analysis of CO{sub 2} leakage into overlying formations due to heterogeneity in both the target saline aquifer and surrounding formations. This uncertainty in leakage will be used to feed into risk assessment modeling.

  1. Equation for liquid density

    SciTech Connect (OSTI)

    Yaws, C.L.; Yang, H.C.; Hopper, J.R.; Cawley, W.A. (Lamar Univ., Beaumont, TX (US))

    1991-01-01T23:59:59.000Z

    Saturated liquid densities for organic chemicals are given as functions of temperature using a modified Rackett equation.

  2. Calcium balance and bone density in immature horses fed a high protein diet

    E-Print Network [OSTI]

    Spooner, Holly Sue

    2006-10-30T23:59:59.000Z

    is easy and non-invasive, the variability among horses is quite high, and thus it is best used for observations of changes in bone density over time for a specific animal. Computer assisted tomography (CAT scan) and dual energy x-ray 7...

  3. The thermal maturation degree of organic matter from source rocks revealed by wells logs including examples from Murzuk Basin, Libya

    SciTech Connect (OSTI)

    Negoita, V.; Gheorghe, A.

    1995-08-01T23:59:59.000Z

    The customary technique used to know the organic matter quantity per rock volume it as well as the organic matter maturation stage is based on geochemical analyses accomplished on a preselected number of samples and cuttings drawn from boreholes during the drilling period. But the same objectives can be approached without any extra cost using the continuous measurements of well logs recorded in each well from the ground surface to the total depth. During the diagenetic stage, the identification of potential source rocks out of which no hydrocarbon have been generated may be carried out using a well logging suite including Gamma Ray Spectrometry, the Compensated Neutron/Litho Density combination and a Dual Induction/Sonic Log. During the catagenetic stage the onset of oil generation brings some important changes in the organic matter structure as well as in the fluid distribution throughout the pore space of source rocks. The replacement of electric conductive water by electric non-conductive hydrocarbons, together with water and oil being expelled from source rocks represent a process of different intensities dependent of time/temperature geohistory and kerogen type. The different generation and expulsion scenarios of hydrocarbons taking place during the catagenetic and metagenetic stages of source rocks are very well revealed by Induction and Laterolog investigations. Several crossplots relating vitrinite reflectance, total organic carbon and log-derived physical parameters are illustrated and discussed. The field applications are coming from Murzuk Basin, where Rompetrol of Libya is operating.

  4. Hot dry rock venture risks investigation:

    SciTech Connect (OSTI)

    Not Available

    1988-01-01T23:59:59.000Z

    This study assesses a promising resource in central Utah as the potential site of a future commerical hot dry rock (HDR) facility for generating electricity. The results indicate that, if the HDR reservoir productivity equals expectations based on preliminary results from research projects to date, a 50 MWe HDR power facility at Roosevelt Hot Springs could generate power at cost competitive with coal-fired plants. However, it is imperative that the assumed productivity be demonstrated before funds are committed for a commercial facility. 72 refs., 39 figs., 38 tabs.

  5. Adsorption of water vapor on reservoir rocks

    SciTech Connect (OSTI)

    Not Available

    1993-07-01T23:59:59.000Z

    Progress is reported on: adsorption of water vapor on reservoir rocks; theoretical investigation of adsorption; estimation of adsorption parameters from transient experiments; transient adsorption experiment -- salinity and noncondensible gas effects; the physics of injection of water into, transport and storage of fluids within, and production of vapor from geothermal reservoirs; injection optimization at the Geysers Geothermal Field; a model to test multiwell data interpretation for heterogeneous reservoirs; earth tide effects on downhole pressure measurements; and a finite-difference model for free surface gravity drainage well test analysis.

  6. Rock Energy Cooperative | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with form HistoryRistma AG Jump to: navigation, searchRochester Gas &JumpRock

  7. Rim Rock Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-f < RAPID‎ | RoadmapRenewableGeothermalsourceOhio:RigbyRim Rock Wind

  8. ArchRock Corporation | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcatAntrim County,Delhi (NCT),Arborview CapitalArchRock Corporation

  9. DOE - Office of Legacy Management -- Slick Rock

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTableSelling Corp -K Le BlondSantaWyomingSlick Rock Slick

  10. Rock Lab Analysis | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries Pvt Ltd Jump to: navigation,MazeOhio:Ohio: Energy ResourcesRock Lab Analysis Jump

  11. Rock, Wisconsin: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries Pvt Ltd Jump to: navigation,MazeOhio:Ohio: Energy Jump to: navigation, searchRock,

  12. Eagle Rock Geothermal Facility | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualPropertyd8c-a9ae-f8521cbb8489 No revision| Open Jump to:(RES-AEI) |Rock Geothermal Facility

  13. Rock Density At Silver Peak Area (DOE GTP) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries Pvt Ltd Jump to: navigation,MazeOhio:Ohio: Energy Resources JumpNebraska: EnergyDOE

  14. Experimental comparison of grating- and propagation-based hard X-ray phase tomography of soft tissue

    SciTech Connect (OSTI)

    Lang, S.; Schulz, G.; Mller, B. [Biomaterials Science Center, University of Basel, Basel (Switzerland); Zanette, I., E-mail: irene.zanette@tum.de [Physik-Department und Institut fr Medizintechnik, Technische Universitt Mnchen, Garching (Germany); European Synchrotron Radiation Facility, Grenoble (France); Dominietto, M. [Biomaterials Science Center, University of Basel, Basel (Switzerland); Institute for Biomedical Engineering, ETH Zrich, Zrich (Switzerland); Langer, M. [European Synchrotron Radiation Facility, Grenoble (France); Universit de Lyon, CREATIS, CNRS UMR5220, Inserm U1044, INSA-LYON, Universit de Lyon 1, Villeurbane (France); Rack, A.; Le Duc, G. [European Synchrotron Radiation Facility, Grenoble (France); David, C. [Laboratory for Micro- and Nanotechnology, Paul Scherrer Institut, Villigen (Switzerland); Mohr, J. [Institute of Microstructure Technology, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen (Germany); Pfeiffer, F. [Physik-Department und Institut fr Medizintechnik, Technische Universitt Mnchen, Garching (Germany); Weitkamp, T. [European Synchrotron Radiation Facility, Grenoble (France); Synchrotron Soleil, Gif-sur-Yvette (France)

    2014-10-21T23:59:59.000Z

    When imaging soft tissues with hard X-rays, phase contrast is often preferred over conventional attenuation contrast due its superior sensitivity. However, it is unclear which of the numerous phase tomography methods yields the optimized results at given experimental conditions. Therefore, we quantitatively compared the three phase tomography methods implemented at the beamline ID19 of the European Synchrotron Radiation Facility: X-ray grating interferometry (XGI), and propagation-based phase tomography, i.e., single-distance phase retrieval (SDPR) and holotomography (HT), using cancerous tissue from a mouse model and an entire heart of a rat. We show that for both specimens, the spatial resolution derived from the characteristic morphological features is about a factor of two better for HT and SDPR compared to XGI, whereas the XGI data generally exhibit much better contrast-to-noise ratios for the anatomical features. Moreover, XGI excels in fidelity of the density measurements, and is also more robust against low-frequency artifacts than HT, but it might suffer from phase-wrapping artifacts. Thus, we can regard the three phase tomography methods discussed as complementary. The application will decide which spatial and density resolutions are desired, for the imaging task and dose requirements, and, in addition, the applicant must choose between the complexity of the experimental setup and the one of data processing.

  15. Sensitivity analysis of GSI based mechanical characterization of rock mass

    E-Print Network [OSTI]

    Vn, P

    2012-01-01T23:59:59.000Z

    Recently, the rock mechanical and rock engineering designs and calculations are frequently based on Geological Strength Index (GSI) method, because it is the only system that provides a complete set of mechanical properties for design purpose. Both the failure criteria and the deformation moduli of the rock mass can be calculated with GSI based equations, which consists of the disturbance factor, as well. The aim of this paper is the sensitivity analysis of GSI and disturbance factor dependent equations that characterize the mechanical properties of rock masses. The survey of the GSI system is not our purpose. The results show that the rock mass strength calculated by the Hoek-Brown failure criteria and both the Hoek-Diederichs and modified Hoek-Diederichs deformation moduli are highly sensitive to changes of both the GSI and the D factor, hence their exact determination is important for the rock engineering design.

  16. United States National Waste Terminal Storage argillaceous rock studies

    SciTech Connect (OSTI)

    Brunton, G.D.

    1981-01-01T23:59:59.000Z

    The past and present argillaceous rock studies for the US National Waste Terminal Storage Program consist of: (1) evaluation of the geological characteristics of several widespread argillaceous formations in the United States; (2) laboratory studies of the physical and chemical properties of selected argillaceous rock samples; and (3) two full-scale in situ surface heater experiments that simulate the emplacement of heat-generating radioactive waste in argillaceous rock.

  17. Velocity and attenuation in partially molten rocks

    SciTech Connect (OSTI)

    Mavko, G.M.

    1980-10-10T23:59:59.000Z

    Interpretation of seismic velocity and attenuation in partially molten rocks has been limited, with few exceptions, to models that assume the melt to be distributed either as spheres or as thin films. However, other melt phase geometries, such as interconnected tubes along grain edges, might equally well account for seismic observations if there is a much larger fraction of melt. Seismic velocity and attenuation are estimated in rocks in which the melt phase has the tube geometry, and the results are compared with results expected for the more familiar film model under similar conditions. For a given melt fraction, tubes are found to give moduli intermediate between moduli for rigid spherical inclusions and compliant films. For example, in polycrystalline olivine at 20 kbar the model predicts a decrease in V/sub s/ of 10% and a decrease in V/sub p/ of 5% at 0.05 melt fraction, without considering inelastic relaxation. Shear attenuation appears to be dominated by viscous flow of melt between the tubes and/or films. For olivine the tube model predicts the increment of relaxation due to melt, ..delta mu../..mu.., to be 0.01 at 0.05 melt fraction. Relaxation of the bulk modulus is dominated by flow between melt pockets of different shape, heat flow, and solid-melt phase change. If melt is present, considerable bulk attenuation is expected, although the relaxation may be observable only at long periods, outside the seismic body wave band.

  18. The US Hot Dry Rock project

    SciTech Connect (OSTI)

    Hendron, R.H.

    1987-01-01T23:59:59.000Z

    The Hot Dry Rock geothermal energy project began in the early 1970's with the objective of developing a technology to make economically available the large ubiquitous thermal energy of the upper earth crust. The program has been funded by the Department of Energy (and its predecessors) and for a few years with participation by West Germany and Japan. An energy reservoir was accessed by drilling and hydraulically fracturing in the precambrian basement rock outside the Valles Caldera of north-central New Mexico. Water was circulated through the reservoir (Phase I, 1978-1980) producing up to 5 MWt at 132/sup 0/C. A second (Phase II) reservoir has been established with a deeper pair of holes and an initial flow test completed producing about 10 MWt at 190/sup 0/C. These accomplishments have been supported and paralleled by developments in drilling, well completion and instrumentation hardware. Acoustic or microseismic fracture mapping and geochemistry studies in addition to hydraulic and thermal data contribute to reservoir analyses. Studies of some of the estimated 430,000 quads of HDR resources in the United States have been made with special attention focused on sites most advantageous for early development.

  19. archaean sedimentary rocks: Topics by E-print Network

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

    situations, much more dependent on the properties of joints Aubertin, Michel 302 Rock Mining Operation Effects on Water Quality in the Everglades Biology and Medicine Websites...

  20. artificial rock fractures: Topics by E-print Network

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

    drainage. ISRM 2003Technology roadmap for rock mechanics, South African Institute of Mining and Metallurgy, 2 Environmental Sciences and Ecology Websites Summary: subsidence...

  1. archean supracrustal rocks: Topics by E-print Network

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

    interesting than whales's research interests include sustainable transportation, life-cycle assessment, and the national security Zhang, Junshan 164 ELASTIC ROCK PROPERTIES OF...

  2. archean metavolcanic rocks: Topics by E-print Network

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

    interesting than whales's research interests include sustainable transportation, life-cycle assessment, and the national security Zhang, Junshan 156 ELASTIC ROCK PROPERTIES OF...

  3. acid rock discharges: Topics by E-print Network

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

    interesting than whales's research interests include sustainable transportation, life-cycle assessment, and the national security Zhang, Junshan 226 ELASTIC ROCK PROPERTIES OF...

  4. alkalic rock: Topics by E-print Network

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

    interesting than whales's research interests include sustainable transportation, life-cycle assessment, and the national security Zhang, Junshan 120 ELASTIC ROCK PROPERTIES OF...

  5. Elastic properties of saturated porous rocks with aligned fractures

    E-Print Network [OSTI]

    2003-12-02T23:59:59.000Z

    This unexpected result is caused by the wave-induced flow of fluids between pores and fractures. ..... For non-fractured rock setting fracture weaknesses. DN and...

  6. average sedimentary rock: Topics by E-print Network

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

    challenge of interpreting environmental tracer concentrations in fractured rock and carbonate aquifers Multidisciplinary Databases and Resources Websites Summary: are reported to...

  7. alum rock sulfur: Topics by E-print Network

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

    -resolution carbon and sulfur isotope profiles from Early to Middle Ordovician carbonate rocks from the Argentine Investigation of isotopic compositions recorded in...

  8. altered sedimentary rocks: Topics by E-print Network

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

    challenge of interpreting environmental tracer concentrations in fractured rock and carbonate aquifers Multidisciplinary Databases and Resources Websites Summary: are reported to...

  9. Poroelastic damage rheology: Dilation, compaction, and failure of rocks

    E-Print Network [OSTI]

    Lyakhovsky, Vladimir

    Poroelastic damage rheology: Dilation, compaction, and failure of rocks Yariv Hamiel Institute December 2004; Published 26 January 2005. Hamiel, Y., V. Lyakhovsky, and A. Agnon (2005), Poroelastic

  10. Reservoir Investigations on the Hot Dry Rock Geothermal System...

    Open Energy Info (EERE)

    Mexico- Tracer Test Results Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Reservoir Investigations on the Hot Dry Rock Geothermal System,...

  11. Rock Sampling At San Francisco Volcanic Field Area (Warpinski...

    Open Energy Info (EERE)

    Field Area Exploration Technique Rock Sampling Activity Date Usefulness not indicated DOE-funding Unknown Notes Northern Arizona University has re-assessed the existing exploration...

  12. AltaRock Energy Announces Successful Multiple-Zone Stimulation...

    Office of Environmental Management (EM)

    Announces Successful Multiple-Zone Stimulation of Well at the Newberry Enhanced Geothermal Systems Demonstration AltaRock Energy Announces Successful Multiple-Zone Stimulation...

  13. Lithology and Alteration Mineralogy of Reservoir Rocks at Coso...

    Open Energy Info (EERE)

    of the upwelling plume were investigated using petrographic and analytical analyses of reservoir rock and vein material. The nature of the low-angle outflow zone and the...

  14. Lithology and alteration mineralogy of reservoir rocks at Coso...

    Open Energy Info (EERE)

    of the upwelling plume were investigated using petrographic and analytical analyses of reservoir rock and vein material. The nature of the low-angle outflow zone and the...

  15. Carbonation Mechanism of Reservoir Rock by Supercritical Carbon...

    Open Energy Info (EERE)

    Task 3: Mechanical behaviors of carbonated minerals. - Task 4: Modeling of CO2- reservoir rock interactions. - Task 5: Preparation of report covering the four tasks previous task,...

  16. The Relationship between Organ Dose and Patients Size in Multidetector Computed Tomography (MDCT) Scans Utilizing Tube Current Modulation (TCM)

    E-Print Network [OSTI]

    Khatonabadi, Maryam

    2013-01-01T23:59:59.000Z

    Dose Reduction With Chest Computed Tomography Using AdaptiveDose reduction in computed tomography by attenuation-baseddose from cardiac computed tomography before and after

  17. Comments on Sensitivity of Emergency Bedside Ultrasound to Detect Hydronephrosis in Patients with Computed Tomography-proven Stones

    E-Print Network [OSTI]

    K?z?lca, zgr; Oztek, Alp; Senol, Utku

    2014-01-01T23:59:59.000Z

    al. Ultrasonography versus computed tomography for suspectedin Patients with Computed Tomography-proven Stones zgrin Patients with Computed Tomography-proven Stones. West J

  18. Usefulness of Computed Tomography Perfusion in Treatment of an Acute Stroke Patient with Unknown Time of Symptom Onset

    E-Print Network [OSTI]

    Fesmire, Francis M; England, Bryan S; Shell, Jared S; Devlin, Thomas G; Buchheit, Ron C

    2014-01-01T23:59:59.000Z

    ischemic stroke using computed tomography perfusion-derivedUsefulness of Computed Tomography Perfusion in Treatment oftime of symptom onset. Computed tomography angiogram (CTA)

  19. Abnormal Arterial Blood Gas and Lactate Levels Do Not Alter Disposition in Adult Blunt Trauma Patients after Early Computed Tomography

    E-Print Network [OSTI]

    Vohra, Taher; Paxton, James

    2013-01-01T23:59:59.000Z

    Patients after Early Computed Tomography Taher Vohra, MDwho also receive computed tomographies (CT) of the chest,cross-sectional computed tomography (CT) of the chest,

  20. Reply to Comments Regarding Sensitivity of Emergency Bedside Ultrasound to Detect Hydronephrosis in Patients with Computed Tomography-proven Stones

    E-Print Network [OSTI]

    Riddell, Jeff; Swadron, Stuart

    2014-01-01T23:59:59.000Z

    al. Ultrasonography versus computed tomography for suspectedin Patients with Computed Tomography-proven Stones zgrin Patients with Computed Tomography-proven Stones. West J

  1. A Novel Immunofluorescent Computed Tomography (ICT) Method to Localise and Quantify Multiple Antigens in Large Tissue Volumes at High Resolution

    E-Print Network [OSTI]

    2012-01-01T23:59:59.000Z

    Immunofluorescent Computed Tomography Figure 1. IterativeImmunofluorescent Computed Tomography 31. Freund I, DeutschNovel Immunofluorescent Computed Tomography (ICT) Method to

  2. THE ATTENUATED RADON TRANSFORM: APPLICATION TO SINGLE-PHOTON EMISSION COMPUTED TOMOGRAPHY IN THE PRESENCE OF A VARIABLE ATTENUATING MEDIUM

    E-Print Network [OSTI]

    Gullberg, Grant T.

    2013-01-01T23:59:59.000Z

    PHOTON EMISSION COMPUTED TOMOGRAPHY IN THE PRESENCE OF APHOTON EMISSION COMPUTED TOMOGRAPHY IN THE PRESENCE OF APHOTON EMISSION COMPUTED TOMOGRAPHY IN THE PRESENCE OF A

  3. The Relationship between Organ Dose and Patients Size in Multidetector Computed Tomography (MDCT) Scans Utilizing Tube Current Modulation (TCM)

    E-Print Network [OSTI]

    Khatonabadi, Maryam

    2013-01-01T23:59:59.000Z

    D. and E. Hall, Computed tomography - An increasing source7430): p. 19. FDA, Computed Tomography (CT). Food and Drugtransmission x-ray computed tomography. Med Phys, 1981. 8(

  4. Process tomography for unitary quantum channels

    SciTech Connect (OSTI)

    Gutoski, Gus [Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2L 2Y5 (Canada)] [Perimeter Institute for Theoretical Physics, Waterloo, Ontario N2L 2Y5 (Canada); Johnston, Nathaniel [Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L 3G1 (Canada)] [Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L 3G1 (Canada)

    2014-03-15T23:59:59.000Z

    We study the number of measurements required for quantum process tomography under prior information, such as a promise that the unknown channel is unitary. We introduce the notion of an interactive observable and we show that any unitary channel acting on a d-level quantum system can be uniquely identified among all other channels (unitary or otherwise) with only O(d{sup 2}) interactive observables, as opposed to the O(d{sup 4}) required for tomography of arbitrary channels. This result generalizes to the problem of identifying channels with at most q Kraus operators, and slight improvements can be obtained if we wish to identify such a channel only among unital channels or among other channels with q Kraus operators. These results are proven via explicit construction of large subspaces of Hermitian matrices with various conditions on rank, eigenvalues, and partial trace. Our constructions are built upon various forms of totally nonsingular matrices.

  5. Bachelor of Science, Radiologic Sciences, Computed Tomography Emphasis, 2014-2015 Name ID# Date

    E-Print Network [OSTI]

    Barrash, Warren

    Bachelor of Science, Radiologic Sciences, Computed Tomography Emphasis, 2014-2015 Name ID# Date RADSCI 450 Principles of Computed Tomography RADSCI 450L Principles of Computed Tomography Lab RADSCI 451 Procedural Case Studies in Computed Tomography RADSCI 455 Clinical Experience in Computed Tomography 1 3 1 3

  6. Bachelor of Science, Radiologic Sciences, Computed Tomography Emphasis, 2013-2014 Name ID# Date

    E-Print Network [OSTI]

    Barrash, Warren

    Bachelor of Science, Radiologic Sciences, Computed Tomography Emphasis, 2013-2014 Name ID# Date RADSCI 450 Principles of Computed Tomography RADSCI 450L Principles of Computed Tomography Lab RADSCI 451 Procedural Case Studies in Computed Tomography RADSCI 455 Clinical Experience in Computed Tomography 1 3 1 3

  7. Lung Nodule Detection in Screening Computed Tomography

    E-Print Network [OSTI]

    Gori, I; Cerello, P; Cheran, S C; De Nunzio, G; Fantacci, M E; Kasae, P; Masala, G L; Prez-Martnez, A; Retico, A

    2007-01-01T23:59:59.000Z

    A computer-aided detection (CAD) system for the identification of pulmonary nodules in low-dose multi-detector helical Computed Tomography (CT) images with 1.25 mm slice thickness is presented. The basic modules of our lung-CAD system, a dot-enhancement filter for nodule candidate selection and a neural classifier for false-positive finding reduction, are described. The results obtained on the collected database of lung CT scans are discussed.

  8. Thermoacoustic tomography arising in brain imaging

    E-Print Network [OSTI]

    Stefanov, Plamen

    2010-01-01T23:59:59.000Z

    We study the mathematical model of thermoacoustic and photoacoustic tomography when the sound speed has a jump across a smooth surface. This models the change of the sound speed in the skull when trying to image the human brain. We derive an explicit inversion formula in the form of a convergent Neumann series under the assumptions that all singularities from the support of the source reach the boundary.

  9. Thermoacoustic tomography arising in brain imaging

    E-Print Network [OSTI]

    Plamen Stefanov; Gunther Uhlmann

    2010-09-09T23:59:59.000Z

    We study the mathematical model of thermoacoustic and photoacoustic tomography when the sound speed has a jump across a smooth surface. This models the change of the sound speed in the skull when trying to image the human brain. We derive an explicit inversion formula in the form of a convergent Neumann series under the assumptions that all singularities from the support of the source reach the boundary.

  10. Thermoacoustic tomography with variable sound speed

    E-Print Network [OSTI]

    Stefanov, Plamen

    2009-01-01T23:59:59.000Z

    We study the mathematical model of thermoacoustic tomography in media with a variable speed for a fixed time interval, greater than the diameter of the domain. In case of measurements on the whole boundary, we give an explicit solution in terms of a Neumann series expansion. We give necessary and sufficient conditions for uniqueness and stability when the measurements are taken on a part of the boundary.

  11. Thermoacoustic tomography with variable sound speed

    E-Print Network [OSTI]

    Plamen Stefanov; Gunther Uhlmann

    2009-05-30T23:59:59.000Z

    We study the mathematical model of thermoacoustic tomography in media with a variable speed for a fixed time interval, greater than the diameter of the domain. In case of measurements on the whole boundary, we give an explicit solution in terms of a Neumann series expansion. We give necessary and sufficient conditions for uniqueness and stability when the measurements are taken on a part of the boundary.

  12. PTYS 109 LAB EXPLORATION AND DISCOVERY IN PLANETARY SCIENCE ROCKS AND MINERALS 133

    E-Print Network [OSTI]

    Cohen, Barbara Anne

    PTYS 109 LAB EXPLORATION AND DISCOVERY IN PLANETARY SCIENCE ROCKS AND MINERALS 133 Rocks and Minerals I. OBJECTIVES One of the many ways to study Earth is by examining the rocks that make up its types of rocks and minerals; determine the formation and the history of each rock and mineral; infer

  13. Density-dependent covariant energy density functionals

    SciTech Connect (OSTI)

    Lalazissis, G. A. [Physics Department, Aristotle University of Thessaloniki, GR-54124 (Greece)

    2012-10-20T23:59:59.000Z

    Relativistic nuclear energy density functionals are applied to the description of a variety of nuclear structure phenomena at and away fromstability line. Isoscalar monopole, isovector dipole and isoscalar quadrupole giant resonances are calculated using fully self-consistent relativistic quasiparticle randomphase approximation, based on the relativistic Hartree-Bogoliubovmodel. The impact of pairing correlations on the fission barriers in heavy and superheavy nuclei is examined. The role of pion in constructing desnity functionals is also investigated.

  14. SEISMIC AND ROCK PHYSICS DIAGNOSTICS OF MULTISCALE RESERVOIR TEXTURES

    SciTech Connect (OSTI)

    Gary Mavko

    2003-06-30T23:59:59.000Z

    As part of our study on ''Relationships between seismic properties and rock microstructure'', we have studied (1) Effects of pore texture on porosity, permeability, and sonic velocity. We show how a relation can be found between porosity, permeability, and velocity by separating the formations of rocks with similar pore textures.

  15. Fluid Migration During Ice/Rock Planetesimal Differentiation

    E-Print Network [OSTI]

    Raney, Robert 1987-

    2012-12-12T23:59:59.000Z

    /water reaction, which will depend on the rate at which water can be segregated from a melting ice/rock core. For the liquid water phase to migrate toward the surface, the denser rock phase must compact. The primary question that this thesis will answer is how...

  16. Geophysical detection and structural characterization of discontinuities in rock

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

  17. RUPTURE BY DAMAGE ACCUMULATION IN ROCKS David Amitrano

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    RUPTURE BY DAMAGE ACCUMULATION IN ROCKS David Amitrano LIRIGM, Universit J. Fourier, Grenoble of rocks is associated with microcracks nucleation and propagation, i.e. damage. The accumulation of damage as strength and modulus. The damage process can be studied both statically by direct observation of thin

  18. ROCK: A Robust Clustering Algorithm for Categorical Attributes

    E-Print Network [OSTI]

    Pennsylvania, University of

    ROCK: A Robust Clustering Algorithm for Categorical Attributes Sudipto Guha Stanford University/proximity between a pair of data points. We develop a robust hierarchical clustering algorithm ROCK that employs measures that are relevant in situations where a domain expert/similarity table is the only source

  19. Carbonation Mechanism of Reservoir Rock by Supercritical Carbon Dioxide

    Broader source: Energy.gov [DOE]

    Project Objectives: Elucidate comprehensively the carbonation reaction mechanisms between supercritical carbon dioxide (scCO2) and reservoir rocks consisting of different mineralogical compositions in aqueous and non-aqueous environments at temperatures of up to 250C, and to develop chemical modeling of CO2-reservior rock interactions.

  20. Rock to Regolith Earth's Critical Zone on Volcanic Ocean Islands

    E-Print Network [OSTI]

    Geist, Dennis

    increases monotonically towards surface #12;Frost creep transport Frequency and depth of freezing event (f in a landscape? (the w question) What governs the efficiency of regolith transport? (the Q question) What lens growth #12;Ice lenses in soils Ice lenses in rock Water freezing in soil and rocks Murton et al

  1. ELASTIC ROCK PROPERTIES OF TIGHT GAS SANDSTONES FOR RESERVOIR CHARACTERIZATION

    E-Print Network [OSTI]

    to successfully produce low permeability gas reservoirs. My study links rock physics to well log and seismic data shales to reservoir sandstones. Typically, the presence of gas-saturated sandstones lowers the Vp/Vs evenELASTIC ROCK PROPERTIES OF TIGHT GAS SANDSTONES FOR RESERVOIR CHARACTERIZATION AT RULISON FIELD

  2. Investigations of Near-Field Thermal-Hydrologic-Mechanical-Chemical Models for Radioactive Waste Disposal in Clay/Shale Rock

    E-Print Network [OSTI]

    Liu, H.H.

    2012-01-01T23:59:59.000Z

    hydraulic rock properties 25 a variety of rock properties and their relationships to flowmechanical and/or hydraulic rock properties. The theoretical

  3. RADIOACTIVE WASTE STORAGE IN MINED CAVERNS IN CRYSTALLINE ROCK-RESULTS OF FIELD INVESTIGATIONS AT STRIPA, SWEDEN

    E-Print Network [OSTI]

    Witherspoon, P.A.

    2010-01-01T23:59:59.000Z

    and M. Board. 1980. "Rock Properties and Their Effect onerature dependence of rock properties has been taken intomeasurements of the rock properties we need to understand

  4. Characterization of Spatial Variability of Hydrogeologic Properties for Unsaturated Flow in the Fractured Rocks at Yucca Mountain, Nevada

    E-Print Network [OSTI]

    Zhou, Quanlin; Bodvarsson, Gudmundur S.; Liu, Hui-Hai; Oldenburg, Curtis M.

    2002-01-01T23:59:59.000Z

    variables and prior rock properties are obtained from theircalibration of rock properties. Zhou et al, CharacterizationLateral variability of rock properties can be seen from the

  5. Computed tomography of the spleen and liver in sickle cell disease

    SciTech Connect (OSTI)

    Magid, D.; Fishman, E.K.; Siegelman, S.S.

    1984-08-01T23:59:59.000Z

    The spleen was assessed in 10 patients with sickle cell disease studied with computed tomography (CT) for abdominal pain and/or unexplained fever. Patients with homozygous sickle cell anemia were found to have small, densely calcified spleens with occasional low-density infarcts. Five of six had hepatomegaly, and there was one case each of hepatic abscess, infarcts, and hemochromatosis. All patients with heterozygous sickle cell disease were found to have splenomegaly, with a variety of findings including acute hemorrhage, acute and chronic infarcts, rupture, and possible sequestration. It was concluded that CT is useful for evaluating the status of the spleen and liver in symptomatic patients with sickle cell disease.

  6. 1.4 PETROPHYSICS: Combined Rock and Fluid Character Integration of geological and petrophysical data allows development of a rock-fluid model for

    E-Print Network [OSTI]

    Schechter, David S.

    data allows development of a rock-fluid model for upper Spraberry rocks. This study identifies the different rock types that comprise the subject reservoirs, marginal reservoirs and non-reservoir rocks shales, clay rich siltstones and very fine sandstones units uses gamma-ray logs (Fig.1.2-1) and is widely

  7. Estimation of hydrologic properties of an unsaturated, fractured rock mass

    SciTech Connect (OSTI)

    Klavetter, E.A.; Peters, R.R.

    1986-07-01T23:59:59.000Z

    In this document, two distinctly different approaches are used to develop continuum models to evaluate water movement in a fractured rock mass. Both models provide methods for estimating rock-mass hydrologic properties. Comparisons made over a range of different tuff properties show good qualitative and quantitative agreement between estimates of rock-mass hydrologic properties made by the two models. This document presents a general discussion of: (1) the hydrology of Yucca Mountain, and the conceptual hydrological model currently being used for the Yucca Mountain site, (2) the development of two models that may be used to estimate the hydrologic properties of a fractured, porous rock mass, and (3) a comparison of the hydrologic properties estimated by these two models. Although the models were developed in response to hydrologic characterization requirements at Yucca Mountain, they can be applied to water movement in any fractured rock mass that satisfies the given assumptions.

  8. Constrained optimization in seismic reflection tomography: an SQP ...

    E-Print Network [OSTI]

    2004-07-06T23:59:59.000Z

    Seismic reflection tomography is a method for determining a subsurface velocity model from the traveltimes of seismic waves reflecting on geological interfaces.

  9. Three-Dimensional Thermal Tomography Advances Cancer Treatment...

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

    Three-Dimensional Thermal Tomography Advances Cancer Treatment Technology available for licensing: A 3D technique to detect early skin changes due to radiation treatment in breast...

  10. Minimally invasive diagnostic imaging using high resolution Optical Coherence Tomography

    E-Print Network [OSTI]

    Herz, Paul Richard, 1972-

    2004-01-01T23:59:59.000Z

    Advances in medical imaging have given researchers unprecedented capabilities to visualize, characterize and understand biological systems. Optical Coherence Tomography (OCT) is a high speed, high resolution imaging technique ...

  11. assisted tomography romicat: Topics by E-print Network

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

    principles behind Doppler tomography, including a comparison of the relative merits of maximum entropy regularisation versus filtered back-projection for implementing the...

  12. abdominal computerized tomography: Topics by E-print Network

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

    principles behind Doppler tomography, including a comparison of the relative merits of maximum entropy regularisation versus filtered back-projection for implementing the...

  13. A New Numerical Algorithm for Thermoacoustic and Photoacoustic Tomography with Variable Sound Speed

    E-Print Network [OSTI]

    Uhlmann, Gunther

    A New Numerical Algorithm for Thermoacoustic and Photoacoustic Tomography with Variable Sound Speed algorithm for reconstructing an unknown source in Thermoacoustic and Photoacoustic Tomography based Thermoacoustic (TAT) and Photoacoustic (PAT) Tomography are emerging medical imaging modal- ities [32, 30

  14. Reduction of radiation dose to radiosensitive organs and its tradeoff with image quality in Computed Tomography

    E-Print Network [OSTI]

    Zhang, Di

    2012-01-01T23:59:59.000Z

    helical multislice computed tomography examination. MedicalRadiation Dose in X-Ray Computed Tomography. AAPM report NO.of X-ray equipment for computed tomography. (2002). American

  15. Edge Localized Image Sharpening via Reassignment with Application to Computed Tomography

    E-Print Network [OSTI]

    Bhashyam, Srikrishna

    Edge Localized Image Sharpening via Reassignment with Application to Computed Tomography Timothy computed tomography. Practical implementations limit the amount of high frequency content. Keywords: Image enhancement, edge sharpening, computed tomography, wavelets, reassignment 1. INTRODUCTION

  16. Root-canal preparation with FlexMaster: canal shapes analysed by micro-computed tomography

    E-Print Network [OSTI]

    Hubscher, W; Barbakow, F; Peters, O A

    2003-01-01T23:59:59.000Z

    analysed by micro-computed tomography W. Hu bscher 1 , F.shapes analysed by micro-computed tomography. Internationalemploying micro-computed tomography (mCT) at a resolution of

  17. Optimizing Cone Beam Computed Tomography (CBCT) System for Image Guided Radiation Therapy

    E-Print Network [OSTI]

    Park, Chun Joo

    Four-Dimensional Cone-Beam Computed Tomography. Submitted.Four-dimensional cone-beam computed tomography and digitalFlat-panel cone-beam computed tomography for image-guided

  18. FAST MARCHING METHOD TO CORRECT FOR REFRACTION IN ULTRASOUND COMPUTED TOMOGRAPHY

    E-Print Network [OSTI]

    Mueller, Klaus

    FAST MARCHING METHOD TO CORRECT FOR REFRACTION IN ULTRASOUND COMPUTED TOMOGRAPHY Shengying Li Detection Systems ABSTRACT A significant obstacle in the advancement of Ultrasound Computed Tomography has ultrasound breast phantom. 1. INTRODUCTION Ultrasound computed tomography (UCT) has a long history

  19. Non-linear inversion modeling for Ultrasound Computer Tomography: transition from soft to hard tissues imaging

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Non-linear inversion modeling for Ultrasound Computer Tomography: transition from soft to hard Marseille cedex 20, France ABSTRACT Ultrasound Computer Tomography (UCT) is an imaging technique which has experiments. Keyword: Ultrasound Computer Tomography, Inverse Born Approximation, Elliptical Projection

  20. Feasibility and value of fully 3D Monte Carlo reconstruction in Single Photon Emission Computed Tomography

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Emission Computed Tomography (SPECT) images is degraded by physical effects, namely photon attenuation datasets are currently under investigation. Keywords : single photon emission computed tomography; Monte Emission Computed Tomography (SPECT), the qualitative and quantitative accuracy of images is degraded

  1. Contrast Enhanced Computed Tomography can predict the glycosaminoglycan content and biomechanical properties

    E-Print Network [OSTI]

    Contrast Enhanced Computed Tomography can predict the glycosaminoglycan content and biomechanical in this work is to establish the feasibility of using Contrast Enhanced Computed Tomography (CECT peripheral quantitative computed tomography (pQCT), subjected to an unconfined compressive stress relaxation

  2. In-line x-ray phase-contrast tomography and diffraction-contrast tomography study of the ferrite-cementite microstructure in steel

    E-Print Network [OSTI]

    van Vliet, Lucas J.

    In-line x-ray phase-contrast tomography and diffraction-contrast tomography study of the ferrite;In-line X-ray phase-contrast tomography and diffraction-contrast tomography study of the ferrite embedded in a ferrite matrix of medium-carbon steel. The measurements were carried out at the material

  3. 28,183HUSEN ET AL.: TOMOGRAPHY OF SHALLOW SUBDUCTION IN CHILE Local earthquake tomography of shallow subduction in north Chile: A

    E-Print Network [OSTI]

    Boschi, Lapo

    [Graeber and Asch, 1999; C. Haberland and A. Rietbrock, Attenuation tomography in the western central Andes

  4. Evidence for the incorporation of lead into barite from waste rock pile materials

    E-Print Network [OSTI]

    COURTIN-NOMADE, ALEXANDRA

    2009-01-01T23:59:59.000Z

    into Barite from Waste Rock Pile Materials A L E X A N D R Awithin the waste rock pile resulting from the excavationdeveloped within waste rock pile originated from a former

  5. Full waveform inversion of a 3-D source inside an artificial rock

    E-Print Network [OSTI]

    To, A C; Glaser, Steven D

    2005-01-01T23:59:59.000Z

    of a 3-D Source Inside an Artificial Rock Albert C. To andof a 3-D source inside an artificial rock plate inof a 3-D source inside an artificial rock plate is

  6. Coupled hydro-mechanical processes in crytalline rock and in induratedand plastic clays: A comparative discussion

    E-Print Network [OSTI]

    Tsang, Chin-Fu; Blumling, Peter; Bernier, Frederic

    2008-01-01T23:59:59.000Z

    of heterogeneity in rock property (clay content and henceNon-linear) elastic properties of the rock. Biot coefficientNon-linear) elastic properties of the rock including their

  7. Comparison of pressure-saturation characteristics derived from computed tomography and lattice Boltzmann simulations

    E-Print Network [OSTI]

    Wildenschild, Dorthe

    Comparison of pressure-saturation characteristics derived from computed tomography and lattice), Comparison of pressure-saturation characteristics derived from computed tomography and lattice Boltzmann

  8. Evaluation of Five Sedimentary Rocks Other Than Salt for Geologic Repository Siting Purposes

    SciTech Connect (OSTI)

    Croff, A.G.; Lomenick, T.F.; Lowrie, R.S.; Stow, S.H.

    2003-11-15T23:59:59.000Z

    The US Department of Energy (DOE), in order to increase the diversity of rock types under consideration by the geologic disposal program, initiated the Sedimary ROck Program (SERP), whose immediate objectiv eis to evaluate five types of secimdnary rock - sandstone, chalk, carbonate rocks (limestone and dolostone), anhydrock, and shale - to determine the potential for siting a geologic repository. The evaluation of these five rock types, together with the ongoing salt studies, effectively results in the consideration of all types of relatively impermeable sedimentary rock for repository purposes. The results of this evaluation are expressed in terms of a ranking of the five rock types with respect to their potential to serve as a geologic repository host rock. This comparative evaluation was conducted on a non-site-specific basis, by use of generic information together with rock evaluation criteria (RECs) derived from the DOE siting guidelines for geologic repositories (CFR 1984). An information base relevant to rock evaluation using these RECs was developed in hydrology, geochemistry, rock characteristics (rock occurrences, thermal response, rock mechanics), natural resources, and rock dissolution. Evaluation against postclosure and preclosure RECs yielded a ranking of the five subject rocks with respect to their potential as repository host rocks. Shale was determined to be the most preferred of the five rock types, with sandstone a distant second, the carbonate rocks and anhydrock a more distant third, and chalk a relatively close fourth.

  9. Cryo-electron tomography of bacterial viruses

    SciTech Connect (OSTI)

    Guerrero-Ferreira, Ricardo C. [Division of Pediatric Infectious Diseases, Emory University School of Medicine, Children's Healthcare of Atlanta, Atlanta, GA 30322 (United States)] [Division of Pediatric Infectious Diseases, Emory University School of Medicine, Children's Healthcare of Atlanta, Atlanta, GA 30322 (United States); Wright, Elizabeth R., E-mail: erwrigh@emory.edu [Division of Pediatric Infectious Diseases, Emory University School of Medicine, Children's Healthcare of Atlanta, Atlanta, GA 30322 (United States)

    2013-01-05T23:59:59.000Z

    Bacteriophage particles contain both simple and complex macromolecular assemblages and machines that enable them to regulate the infection process under diverse environmental conditions with a broad range of bacterial hosts. Recent developments in cryo-electron tomography (cryo-ET) make it possible to observe the interactions of bacteriophages with their host cells under native-state conditions at unprecedented resolution and in three-dimensions. This review describes the application of cryo-ET to studies of bacteriophage attachment, genome ejection, assembly and egress. Current topics of investigation and future directions in the field are also discussed.

  10. Characterizing aquifer heterogeneity using hydraulic tomography

    E-Print Network [OSTI]

    Wachter, Brian James

    2008-07-29T23:59:59.000Z

    such as sands and gravels because these materials drain the water so quickly. The K value is highly localized and only represents the portion of the aquifer in which the core was taken. When working with unconsolidated sediments, care must be taken to pack...?????. .?????.1 17 vi LIST OF FIGURES Figure 1: Map of field site and layout of wells used in study (figure modified from Engard, 2006). Figure 2: MOG setup for tomography study. Figure 3: Packed versus unpacked response in an observation well...

  11. Mathematics of Photoacoustic and Thermoacoustic Tomography

    E-Print Network [OSTI]

    Kuchment, Peter

    2009-01-01T23:59:59.000Z

    This is the manuscript of the chapter for a planned Handbook of Mathematical Methods in Imaging that surveys the mathematical models, problems, and algorithms of the Thermoacoustic (TAT) and Photoacoustic (PAT) Tomography. TAT and PAT represent probably the most developed of the several novel ``hybrid'' methods of medical imaging. These new modalities combine different physical types of waves (electromagnetic and acoustic in case of TAT and PAT) in such a way that the resolution and contrast of the resulting method are much higher than those achievable using only acoustic or electromagnetic measurements.

  12. Thermoacoustic tomography with an arbitrary elliptic operator

    E-Print Network [OSTI]

    Michael V. Klibanov

    2012-08-26T23:59:59.000Z

    Thermoacoustic tomography is a term for the inverse problem of determining of one of initial conditions of a hyperbolic equation from boundary measurements. In the past publications both stability estimates and convergent numerical methods for this problem were obtained only under some restrictive conditions imposed on the principal part of the elliptic operator. In this paper logarithmic stability estimates are obatined for an arbitrary variable principal part of that operator. Convergence of the Quasi-Reversibility Method to the exact solution is also established for this case. Both complete and incomplete data collection cases are considered.

  13. Mathematics of Photoacoustic and Thermoacoustic Tomography

    E-Print Network [OSTI]

    Peter Kuchment; Leonid Kunyansky

    2009-12-10T23:59:59.000Z

    This is the manuscript of the chapter for a planned Handbook of Mathematical Methods in Imaging that surveys the mathematical models, problems, and algorithms of the Thermoacoustic (TAT) and Photoacoustic (PAT) Tomography. TAT and PAT represent probably the most developed of the several novel ``hybrid'' methods of medical imaging. These new modalities combine different physical types of waves (electromagnetic and acoustic in case of TAT and PAT) in such a way that the resolution and contrast of the resulting method are much higher than those achievable using only acoustic or electromagnetic measurements.

  14. Momentum computed tomography of charged particles

    E-Print Network [OSTI]

    Yu, Deyang

    2013-01-01T23:59:59.000Z

    The principle of the momentum computed tomography of charged particles is presented. It may be useful for momentum spectroscopy of various beam-matter interactions, especially when very intense beams are involved. It is able to collect the shower of charged particles with the 4Pi solid angle, and suitable for measuring the overall perspective of the arbitrary momentum distribution of the outgoing charged particles induced by arbitrary beams, especially when the other techniques are invalid. The extended collisional region, the strong field approximation and the case without magnetic field are discussed.

  15. Adaptive schemes for incomplete quantum process tomography

    SciTech Connect (OSTI)

    Teo, Yong Siah [Centre for Quantum Technologies, National University of Singapore, Singapore 117543 (Singapore); NUS Graduate School for Integrative Sciences and Engineering, Singapore 117597 (Singapore); Englert, Berthold-Georg [Centre for Quantum Technologies, National University of Singapore, Singapore 117543 (Singapore); Department of Physics, National University of Singapore, Singapore 117542 (Singapore); Rehacek, Jaroslav; Hradil, Zdenek [Department of Optics, Palacky University, 17. listopadu 12, CZ-77146 Olomouc (Czech Republic)

    2011-12-15T23:59:59.000Z

    We propose an iterative algorithm for incomplete quantum process tomography with the help of quantum state estimation. The algorithm, which is based on the combined principles of maximum likelihood and maximum entropy, yields a unique estimator for an unknown quantum process when one has less than a complete set of linearly independent measurement data to specify the quantum process uniquely. We apply this iterative algorithm adaptively in various situations and so optimize the amount of resources required to estimate a quantum process with incomplete data.

  16. Laboratory measurements on reservoir rocks from The Geysers geothermal field

    SciTech Connect (OSTI)

    Boitnott, G.N.

    1995-01-26T23:59:59.000Z

    A suite of laboratory measurements have been conducted on Geysers metagraywacke and metashale recovered from a drilled depth of 2599 to 2602 meters in NEGU-17. The tests have been designed to constrain the mechanical and water-storage properties of the matrix material. Various measurements have been made at a variety of pressures and at varying degrees of saturation. Both compressional and shear velocities exhibit relatively little change with effective confining pressure. In all of the samples, water saturation causes an increase in the compressional velocity. In some samples, saturation results in a moderate decrease in shear velocity greater in magnitude than would be expected based on the slight increase in bulk density. It is found that the effect of saturation on the velocities can be quantitatively modeled through a modification of Biot-Gassmann theory to include weakening of the shear modulus with saturation. The decrease is attributed to chemo-mechanical weakening caused by the presence of water. The degree of frame weakening of the shear modulus is variable between samples, and appears correlated with petrographic features of the cores. Two related models are presented through which we can study the importance of saturation effects on field-scale velocity variations. The model results indicate that the saturation effects within the matrix are significant and may contribute to previously observed field anomalies. The results help to define ways in which we may be able to separate the effects of variations in rock properties, caused by phenomena such as degree of fracturing, from similar effects caused by variations in matrix saturation. The need for both compressional and shear velocity data in order to interpret field anomalies is illustrated through comparisons of model results with the field observations.

  17. Scattered Neutron Tomography Based on A Neutron Transport Inverse Problem

    SciTech Connect (OSTI)

    William Charlton

    2007-07-01T23:59:59.000Z

    Neutron radiography and computed tomography are commonly used techniques to non-destructively examine materials. Tomography refers to the cross-sectional imaging of an object from either transmission or reflection data collected by illuminating the object from many different directions.

  18. Signal processing in scanning thermoacoustic tomography in biological tissues

    E-Print Network [OSTI]

    Wang, Lihong

    Signal processing in scanning thermoacoustic tomography in biological tissues Yuan Xu and Lihong V Microwave-induced thermoacoustic tomography was explored to image biological tissues. Short microwave pulses-induced thermoacoustic waves were detected with a focused ultrasonic transducer to obtain two-dimensional tomographic

  19. Microwave-induced thermoacoustic tomography: Reconstruction by synthetic aperture

    E-Print Network [OSTI]

    Wang, Lihong

    Microwave-induced thermoacoustic tomography: Reconstruction by synthetic aperture Dazi Feng, Yuan thermoacoustic signals, to which the delay-and-sum algorithm was applied for image reconstruc- tion. We greatly-induced thermoacoustic tomography based on focused transducers. Two mi- crowave sources, which had frequencies of 9 and 3

  20. Propagation Beam Consideration for 3D THz Computed Tomography

    E-Print Network [OSTI]

    Boyer, Edmond

    Propagation Beam Consideration for 3D THz Computed Tomography B. Recur, 1, J.P. Guillet, 2 I. Manek, "Refraction losses in terahertz computed tomography," Opt. Commun. 283, 20502055 (2010). 8. S. Nadar, H of the beam propagation is developed according to the physical properties of THz waves used in THz computed

  1. High-Resolution Computed Tomography Study of the Cranium of

    E-Print Network [OSTI]

    Allman, John M.

    High-Resolution Computed Tomography Study of the Cranium of a Fossil Anthropoid Primate of these characteristics may have important implications for brain evolution. Here computed tomography is used to examine in the evolutionary development of anthropoids did these characteristics evolve? We recently used X-ray computed

  2. Optimal control techniques for thermo-acoustic tomography Maitine Bergounioux

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    . These hybrid systems use an electromagnetic pulse as an input and record ultrasound waves as an output-acoustic tomography (TAT) when the heating is realized by means of microwaves, and of photo-acoustic tomography (PAT) when optical heating is used. While in TAT waves of radio frequency range are used to trigger

  3. America's Atomic Army: The Historical Archaeology of Camp Desert Rock

    SciTech Connect (OSTI)

    Susan R. Edwards

    2007-11-02T23:59:59.000Z

    Established in 1951, Camp Desert Rock served as the training ground for America's 'Atomic Army'. For the next six years, U.S. ground troops traveled to the Nevada desert to participate in military maneuvers during atmospheric atomic weapons testing. Nearly 60,000 soldiers received physical and psychological training in atomic warfare. Abandoned when atmospheric testing ended, Camp Desert Rock was dismantled and its buildings moved to other locations. Today, the camp appears as a sterile expanse of desert marked by rock-lined tent platforms, concrete foundations, and trash scatters. Although visually unimposing, the site is rich with the history of America's nuclear testing program.

  4. Double-Difference Tomography for Sequestration MVA

    SciTech Connect (OSTI)

    Westman, Erik

    2008-12-31T23:59:59.000Z

    Analysis of synthetic data was performed to determine the most cost-effective tomographic monitoring system for a geologic carbon sequestration injection site. Double-difference tomographic inversion was performed on 125 synthetic data sets: five stages of CO2 plume growth, five seismic event regions, and five geophone arrays. Each resulting velocity model was compared quantitatively to its respective synthetic velocity model to determine an accuracy value. The results were examined to determine a relationship between cost and accuracy in monitoring, verification, and accounting applications using double-difference tomography. The geophone arrays with widely-varying geophone locations, both laterally and vertically, performed best. Additionally, double difference seismic tomography was performed using travel time data from a carbon sequestration site at the Aneth oil field in southeast Utah as part of a Department of Energy initiative on monitoring, verification, and accounting (MVA) of sequestered CO2. A total of 1,211 seismic events were recorded from a borehole array consisting of 22 geophones. Artificial velocity models were created to determine the ease with which different CO2 plume locations and sizes can be detected. Most likely because of the poor geophone arrangement, a low velocity zone in the Desert Creek reservoir can only be detected when regions of test site containing the highest ray path coverage are considered. MVA accuracy and precision may be improved through the use of a receiver array that provides more comprehensive ray path coverage.

  5. 1st World Congress on Industrial Process Tomography, Buxton, Greater Manchester 1417 April 1999. Eddy Current Tomography for Metal

    E-Print Network [OSTI]

    Hua, Yingbo

    . 451 Eddy Current Tomography for Metal Solidification Imaging Minh H. Pham* , Yingbo Hua* , Neil B of molten metal inside a pipe by eddy currents. A complete mathematical model is developed which reveals functions in multiple layered media. Keywords: eddy current tomography, electromagnetic field, numerical

  6. High density matter

    E-Print Network [OSTI]

    J. R. Stone

    2013-02-11T23:59:59.000Z

    The microscopic composition and properties of matter at super-saturation densities have been the subject of intense investigation for decades. The scarcity of experimental and observational data has lead to the necessary reliance on theoretical models. However, there remains great uncertainty in these models, which, of necessity, have to go beyond the over-simple assumption that high density matter consists only of nucleons and leptons. Heavy strange baryons, mesons and quark matter in different forms and phases have to be included to fulfil basic requirements of fundamental laws of physics. In this review the latest developments in construction of the Equation of State (EoS) of high-density matter at zero and finite temperature assuming different composition of the matter are surveyed. Critical comparison of model EoS with available observational data on neutron stars, including gravitational masses, radii and cooling patterns is presented. The effect of changing rotational frequency on the composition of neutron stars during their lifetime is demonstrated. Compatibility of EoS of high-density, low temperature compact objects and low density, high temperature matter created in heavy-ion collisions is discussed.

  7. The Effect of Heterogeneity on Matrix Acidizing of Carbonate Rocks

    E-Print Network [OSTI]

    Keys, Ryan S.

    2010-07-14T23:59:59.000Z

    pressure. A hydrochloric acid solution is used in carbonate reservoirs, which actually dissolves the calcite rock matrix in the form of conductive channels called wormholes. These wormholes propagate from the wellbore out into the reservoir, bypassing...

  8. Characterizing Flow in Oil Reservoir Rock Using Smooth Particle Hydrodynamics

    E-Print Network [OSTI]

    Holmes, David W.

    In this paper, a 3D Smooth Particle Hydrodynamics (SPH) simulator for modeling grain scale fluid flow in porous rock is presented. The versatility of the SPH method has driven its use in increasingly complex areas of flow ...

  9. Experimental Study on Rock Deformation and Permeability Variation

    E-Print Network [OSTI]

    Ding, Jihui

    2013-08-01T23:59:59.000Z

    The development of a petroleum reservoir would inevitably induce a rearrangement of the in-situ stress field. The rearrangement of the stress field would then bring about a deformation of the reservoir rock and a change of the permeability...

  10. A Study of Hydraulic Fracturing Initiation in Transversely Isotropic Rocks

    E-Print Network [OSTI]

    Serajian, Vahid

    2011-10-21T23:59:59.000Z

    fractures and also can be used to develop information about in-situ rock properties using failure pressure values observed in the field. Finally, mechanical and permeability anisotropy are measured using Pulse Permeameter and triaxial tests on Pierre shale....

  11. Modeling of Seismic Signatures of Carbonate Rock Types

    E-Print Network [OSTI]

    Jan, Badr H.

    2011-02-22T23:59:59.000Z

    Carbonate reservoirs of different rock types have wide ranges of porosity and permeability, creating zones with different reservoir quality and flow properties. This research addresses how seismic technology can be used ...

  12. The Effect of Heterogeneity on Matrix Acidizing of Carbonate Rocks

    E-Print Network [OSTI]

    Keys, Ryan S.

    2010-07-14T23:59:59.000Z

    In matrix acidizing, the goal is to dissolve minerals in the rock to increase well productivity. This is accomplished by injecting an application-specific solution of acid into the formation at a pressure between the pore ...

  13. SEISMIC AND ROCK PHYSICS DIAGNOSTICS OF MULTISCALE RESERVOIR TEXTURES

    SciTech Connect (OSTI)

    Gary Mavko

    2003-06-01T23:59:59.000Z

    As part of our study on ''Relationships between seismic properties and rock microstructure'', we have studied (1) Elastic properties of clay minerals using Pulse Transmission experiments. We show measurements of elastic moduli and strain in clay minerals.

  14. ROCK MASS CHARACTERIZATION FOR STORAGE OF NUCLEAR WASTE IN GRANITE

    E-Print Network [OSTI]

    Witherspoon, P.A.

    2010-01-01T23:59:59.000Z

    of an in-situ jointed granite. Intl. J. Rock Mech. and Min.of Groundwaters in the Stripa Granite: Results and Preof water through Westerly Granite at temperatures of 100 -

  15. Geochemical Data on Waters, Gases, Scales, and Rocks from the...

    Open Energy Info (EERE)

    Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Geochemical Data on Waters, Gases, Scales, and Rocks from the Dixie Valley Region, Nevada (1996-1999)...

  16. Drilling Complete on Australian Hot Dry Rock Project

    Broader source: Energy.gov [DOE]

    The first commercial attempt to create a commercial geothermal power plant using hot dry rock technology reached a crucial milestone on January 22, when a production well successfully reached its target depth.

  17. FREE ROCKING OF PRISMATIC BLOCKS By P. R. Lipscombe1

    E-Print Network [OSTI]

    Pellegrino, Sergio

    FREE ROCKING OF PRISMATIC BLOCKS By P. R. Lipscombe1 and S. Pellegrino2 ABSTRACT: This paper. This cycle comes to an end when the block becomes vertical and starts to rotate again about A. Because some

  18. Modeling of Seismic Signatures of Carbonate Rock Types

    E-Print Network [OSTI]

    Jan, Badr H.

    2011-02-22T23:59:59.000Z

    Carbonate reservoirs of different rock types have wide ranges of porosity and permeability, creating zones with different reservoir quality and flow properties. This research addresses how seismic technology can be used to identify different...

  19. Mimbres rock art: a graphic legacy of cultural expression

    E-Print Network [OSTI]

    Tidemann, Kathryn

    2002-01-01T23:59:59.000Z

    Rock art abounds along the Mimbres River banks and drainage tributaries reflecting the rich cultural remains of the ancient Mimbres people. The Mimbres are a well established cultural group who lived in southwest New Mexico and northern Mexico from...

  20. Zeolitization Of Intracaldera Sediments And Rhyolitic Rocks In...

    Open Energy Info (EERE)

    Rhyolitic Rocks In The 1.25 Ma Lake Of Valles Caldera, New Mexico, USA Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Zeolitization Of...

  1. Zeolitization Of Intracaldera Sediments And Rhyolitic Rocks In...

    Open Energy Info (EERE)

    Sediments And Rhyolitic Rocks In The 1.25 Ma Lake Of Valles Caldera, New Mexico, Usa Abstract Quantitative X-ray diffraction analysis of about 80 rhyolite and associated...

  2. DNAPL remediation of fractured rock evaluated via numerical simulation

    E-Print Network [OSTI]

    Pang, Ti Wee

    2010-01-01T23:59:59.000Z

    Fractured rock formations represent a valuable source of groundwater and can be highly susceptible to contamination by dense, non-aqueous phase liquids (DNAPLs). The goal of this research is to evaluate the effectiveness ...

  3. Figure 2. Stratigraphic Summary of Ages, Names and Rock Types...

    Gasoline and Diesel Fuel Update (EIA)

    2. Stratigraphic Summary of Ages, Names and Rock Types in the ANWR 1002 and Coastal Plain Area of the Alaska North Slope. Potentially Productive Reservoirs and Plays Assessed by...

  4. Rock Hill Utilities- Water Heater and Heat Pump Rebate Program

    Broader source: Energy.gov [DOE]

    Through the SmartChoice program, Rock Hill Utilities offers rebates for water heater and heat pump replacements. Information on financing for heat pumps can also be found on the web site listed...

  5. Rock glacier monitoring with low-cost GPS

    E-Print Network [OSTI]

    moving stations on rock glacier Low-cost L1 GPS receivers (blox) Power source: solar panels Local data Rock glacier GPS antennaGPS antenna Solar panelSolar panel Box incl.Box incl. -GPS receiverData logger Instruments Solar panelSolar panel (24W, 12V, 50x50cm)(24W, 12V, 50x50cm) Costs per station: 2

  6. Reservoir rock-property calculations from thin section measurements

    E-Print Network [OSTI]

    Sneed, David Richard

    1988-01-01T23:59:59.000Z

    RESERVOIR ROCK-PROPERTY CALCULATIONS FROM THIN SECTION MEASUREMENTS A Thesis by DAVID RICHARD SNEED Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE August 1988 Major Subject: Geology RESERVOIR ROCK-PROPERTY CALCULATIONS FROM THIN SECTION MEASUREMENTS A Thesis by DAVID RICHARD SNEED Approved as to style and content by: Robert R. Berg (Chair of Committee) ~ c(. Thomas T. Tieh (Member...

  7. Density Matrix Topological Insulators

    E-Print Network [OSTI]

    A. Rivas; O. Viyuela; M. A. Martin-Delgado

    2013-10-31T23:59:59.000Z

    Thermal noise can destroy topological insulators (TI). However we demonstrate how TIs can be made stable in dissipative systems. To that aim, we introduce the notion of band Liouvillian as the dissipative counterpart of band Hamiltonian, and show a method to evaluate the topological order of its steady state. This is based on a generalization of the Chern number valid for general mixed states (referred to as density matrix Chern value), which witnesses topological order in a system coupled to external noise. Additionally, we study its relation with the electrical conductivity at finite temperature, which is not a topological property. Nonetheless, the density matrix Chern value represents the part of the conductivity which is topological due to the presence of quantum mixed edge states at finite temperature. To make our formalism concrete, we apply these concepts to the two-dimensional Haldane model in the presence of thermal dissipation, but our results hold for arbitrary dimensions and density matrices.

  8. Determination of the spatial characteristics of an RF electrodeless discharge by the method of emission tomography

    SciTech Connect (OSTI)

    Denisova, N. V. [Russian Academy of Sciences, Institute of Theoretical and Applied Mechanics, Siberian Division (Russian Federation); Revalde, G.; Skudra, A. [University of Latvia, Institute of Atomic physics and Spectroscopy (Latvia)

    2006-11-15T23:59:59.000Z

    The spatial distribution of the density of mercury atoms in the 7{sup 3}S state in a spherical RF electrode-less gas-discharge lamp is reconstructed by the method of emission tomography. The local values of the corresponding emission coefficients, which are proportional to the density of mercury atoms in the 7{sup 3}S state, are determined from integral (over the plasma volume) measurements of the lamp radiation at a wavelength of 546.1 nm with the help of an algorithm based on the maximum entropy method. The results obtained show that, for all of the operating modes under study, the profile of the density of mercury atoms in the 7{sup 3}S state has a minimum in the center of the lamp and a maximum near its wall. At a generator current of 100 mA and cold-spot temperature of 41 deg. C, the density of mercury atoms in the 7{sup 3}S state is observed to drop substantially both in the center of the lamp and near its wall, the density in the center being reduced to almost zero. An explanation of this phenomenon is proposed.

  9. Estimating seismic velocities at ultrasonic frequencies in partially saturated rocks

    SciTech Connect (OSTI)

    Mavko, G.; Nolen-Hoeksema, R. (Stanford Univ., CA (United States). Dept. of Geophysics)

    1994-02-01T23:59:59.000Z

    Seismic velocities in rocks at ultrasonic frequencies depend not only on the degree of saturation but also on the distribution of the fluid phase at various scales within the pore space. Two scales of saturation heterogeneity are important: (1) saturation differences between thin compliant pores and larger stiffer pores, and (2) differences between saturated patches and undersaturated patches at a scale much larger than any pore. The authors propose a formalism for predicting the range of velocities in partially saturated rocks that avoids assuming idealized pore shapes by using measured dry rock velocity versus pressure and dry rock porosity versus pressure. The pressure dependence contains all of the necessary information about the distribution of pore compliance for estimating effects of saturation at the finest scales where small amounts of fluid in the thinnest, most compliant parts of the pore space stiffen the rock in both compression and shear (increasing both P- and S-wave velocities) in approximately the same way that confining pressure stiffens the rock by closing the compliant pores. Large-scale saturation patches tend to increase only the high-frequency bulk modulus by amounts roughly proportional to the saturation. The pore-scale effects will be most important at laboratory and logging frequencies when pore-scale pore pressure gradients are unrelaxed. The patchy-saturation effects can persist even at seismic field frequencies if the patch sizes are sufficiently large and the diffusivities are sufficiently low for the larger-scale pressure gradients to be unrelaxed.

  10. International Journal of Rock Mechanics & Mining Sciences 38 (2001) 9951027 Bayesian estimation of rock mass boundary conditions with

    E-Print Network [OSTI]

    Pan, Ernie

    of rock mass boundary conditions with applications to the AECL underground research laboratory F. Tonon*,1 of the Underground Research Laboratory (URL) of the Atomic Energy of Canada Limited (AECL), Canada. The procedure

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

    E-Print Network [OSTI]

    Aubertin, Michel

    USING GEOPHYSICAL METHODS TO IMAGE THE INTERNAL STRUCTURE OF MINE WASTE ROCK PILES Campos, D.1-Noranda, Canada (bruno.bussiere@uqat.uquebec.ca) INTRODUCTION Mine waste rock piles, or rockwaste dumps rock piles. One of the most critical of these is water flow and water distribution in the waste rock

  12. SPE 159255-PP Rock Classification from Conventional Well Logs in Hydrocarbon-Bearing

    E-Print Network [OSTI]

    Torres-Verdn, Carlos

    typing method for application in hydrocarbon-bearing shale (specifically source rock) reservoirs using conventional well logs and core data. Source rock reservoirs are known to be highly heterogeneous and often, petrophysical description of source rock reservoirs with well logs has been focused to quantifying rock

  13. 1. INTRODUCTION There are breaks or cracks in every rock mass

    E-Print Network [OSTI]

    Maerz, Norbert H.

    [2]. Discontinuity influences all the engineering properties and behavior of rock [3]. When dealing with discontinuous rock masses, the properties of the discontinuities become a prime importance since that determines. The presence of discontinuities also affects rock properties such as the strength of the rock and the hydraulic

  14. Dynamic measurements of the nonlinear elastic parameter A in rock under varying conditions

    E-Print Network [OSTI]

    saturation. INDEX TERMS: 5102 Physical Properties of Rocks: Acoustic properties; 5112 Physical Properties of Rocks: Microstructure; 5199 Physical Properties of Rocks: General or miscellaneous; 9810 GeneralDynamic measurements of the nonlinear elastic parameter A in rock under varying conditions Paul A

  15. Roadmap: Radiologic Imaging Sciences -Computed Tomography (with certification and ATS Radiologic Technology) -

    E-Print Network [OSTI]

    Sheridan, Scott

    Roadmap: Radiologic Imaging Sciences - Computed Tomography (with certification and ATS Radiologic 34084 Computed Tomography and Magnetic Resonance Imaging Sectional Anatomy I 2 C RIS 44021 Patient Management in Computed Tomography 2 C RIS 44025 Computed Tomography Clinical Education I 3 C RIS 44030

  16. Roadmap: Radiologic Imaging Sciences -Computed Tomography (with certification and ATS Radiologic Technology) -

    E-Print Network [OSTI]

    Sheridan, Scott

    Roadmap: Radiologic Imaging Sciences - Computed Tomography (with certification and ATS Radiologic 34084 Computed Tomography and Magnetic Resonance Imaging Sectional Anatomy I 2 C RIS 44021 Patient Management in Computed Tomography (CT) 2 C RIS 44025 Computed Tomography (CT) Clinical Education I 3 C

  17. Flow Velocity Estimation in Optical Doppler Tomography and A Preliminary Study on Radiation Detection for Hybrid

    E-Print Network [OSTI]

    Piao, Daqing

    Tomography and A Preliminary Study on Radiation Detection for Hybrid Optical Coherence TomographyFlow Velocity Estimation in Optical Doppler Tomography and A Preliminary Study on Radiation Detection for Hybrid Optical Coherence Tomography/Scintigraphy Daqing Piao B.S., Tsinghua University, 1990 M

  18. Multiple density layered insulator

    DOE Patents [OSTI]

    Alger, Terry W. (Tracy, CA)

    1994-01-01T23:59:59.000Z

    A multiple density layered insulator for use with a laser is disclosed wh provides at least two different insulation materials for a laser discharge tube, where the two insulation materials have different thermoconductivities. The multiple layer insulation materials provide for improved thermoconductivity capability for improved laser operation.

  19. Multiple density layered insulator

    DOE Patents [OSTI]

    Alger, T.W.

    1994-09-06T23:59:59.000Z

    A multiple density layered insulator for use with a laser is disclosed which provides at least two different insulation materials for a laser discharge tube, where the two insulation materials have different thermoconductivities. The multiple layer insulation materials provide for improved thermoconductivity capability for improved laser operation. 4 figs.

  20. Energy in density gradient

    E-Print Network [OSTI]

    Vranjes, J

    2015-01-01T23:59:59.000Z

    Inhomogeneous plasmas and fluids contain energy stored in inhomogeneity and they naturally tend to relax into lower energy states by developing instabilities or by diffusion. But the actual amount of energy in such inhomogeneities has remained unknown. In the present work the amount of energy stored in a density gradient is calculated for several specific density profiles in a cylindric configuration. This is of practical importance for drift wave instability in various plasmas, and in particular in its application in models dealing with the heating of solar corona because the instability is accompanied with stochastic heating, so the energy contained in inhomogeneity is effectively transformed into heat. It is shown that even for a rather moderate increase of the density at the axis in magnetic structures in the corona by a factor 1.5 or 3, the amount of excess energy per unit volume stored in such a density gradient becomes several orders of magnitude greater than the amount of total energy losses per unit ...

  1. Compact conscious animal positron emission tomography scanner

    DOE Patents [OSTI]

    Schyler, David J. (Bellport, NY); O'Connor, Paul (Bellport, NY); Woody, Craig (Setauket, NY); Junnarkar, Sachin Shrirang (Sound Beach, NY); Radeka, Veljko (Bellport, NY); Vaska, Paul (Sound Beach, NY); Pratte, Jean-Francois (Stony Brook, NY); Volkow, Nora (Chevy Chase, MD)

    2006-10-24T23:59:59.000Z

    A method of serially transferring annihilation information in a compact positron emission tomography (PET) scanner includes generating a time signal for an event, generating an address signal representing a detecting channel, generating a detector channel signal including the time and address signals, and generating a composite signal including the channel signal and similarly generated signals. The composite signal includes events from detectors in a block and is serially output. An apparatus that serially transfers annihilation information from a block includes time signal generators for detectors in a block and an address and channel signal generator. The PET scanner includes a ring tomograph that mounts onto a portion of an animal, which includes opposing block pairs. Each of the blocks in a block pair includes a scintillator layer, detection array, front-end array, and a serial encoder. The serial encoder includes time signal generators and an address signal and channel signal generator.

  2. Ultra-high resolution computed tomography imaging

    DOE Patents [OSTI]

    Paulus, Michael J. (Knoxville, TN); Sari-Sarraf, Hamed (Knoxville, TN); Tobin, Jr., Kenneth William (Harriman, TN); Gleason, Shaun S. (Knoxville, TN); Thomas, Jr., Clarence E. (Knoxville, TN)

    2002-01-01T23:59:59.000Z

    A method for ultra-high resolution computed tomography imaging, comprising the steps of: focusing a high energy particle beam, for example x-rays or gamma-rays, onto a target object; acquiring a 2-dimensional projection data set representative of the target object; generating a corrected projection data set by applying a deconvolution algorithm, having an experimentally determined a transfer function, to the 2-dimensional data set; storing the corrected projection data set; incrementally rotating the target object through an angle of approximately 180.degree., and after each the incremental rotation, repeating the radiating, acquiring, generating and storing steps; and, after the rotating step, applying a cone-beam algorithm, for example a modified tomographic reconstruction algorithm, to the corrected projection data sets to generate a 3-dimensional image. The size of the spot focus of the beam is reduced to not greater than approximately 1 micron, and even to not greater than approximately 0.5 microns.

  3. Rock River Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-f < RAPID‎ |Rippey Jump to: navigation, searchRobbinsDensity

  4. Magnified Weak Lensing Cross Correlation Tomography

    SciTech Connect (OSTI)

    Ulmer, Melville P., Clowe, Douglas I.

    2010-11-30T23:59:59.000Z

    This project carried out a weak lensing tomography (WLT) measurement around rich clusters of galaxies. This project used ground based photometric redshift data combined with HST archived cluster images that provide the WLT and cluster mass modeling. The technique has already produced interesting results (Guennou et al, 2010,Astronomy & Astrophysics Vol 523, page 21, and Clowe et al, 2011 to be submitted). Guennou et al have validated that the necessary accuracy can be achieved with photometric redshifts for our purposes. Clowe et al titled "The DAFT/FADA survey. II. Tomographic weak lensing signal from 10 high redshift clusters," have shown that for the **first time** via this purely geometrical technique, which does not assume a standard rod or candle, that a cosmological constant is **required** for flat cosmologies. The intent of this project is not to produce the best constraint on the value of the dark energy equation of state, w. Rather, this project is to carry out a sustained effort of weak lensing tomography that will naturally feed into the near term Dark Energy Survey (DES) and to provide invaluable mass calibration for that project. These results will greatly advance a key cosmological method which will be applied to the top-rated ground-based project in the Astro2020 decadal survey, LSST. Weak lensing tomography is one of the key science drivers behind LSST. CO-I Clowe is on the weak lensing LSST committee, and senior scientist on this project, at FNAL James Annis, plays a leading role in the DES. This project has built on successful proposals to obtain ground-based imaging for the cluster sample. By 1 Jan, it is anticipated the project will have accumulated complete 5-color photometry on 30 (or about 1/3) of the targeted cluster sample (public webpage for the survey is available at http://cencos.oamp.fr/DAFT/ and has a current summary of the observational status of various clusters). In all, the project has now been awarded the equivalent of over 60 nights on 4-m class telescopes, which gives concrete evidence of strong community support for this project. The WLT technique is based on the dependence of the gravitational shear signal on the angular diameter distances between the observer, the lens, and the lensed galaxy to measure cosmological parameters. By taking the ratio of measured shears of galaxies with different redshifts around the same lens, one obtains a measurement of the ratios of the angular diameter distances involved. Making these observations over a large range of lenses and background galaxy redshifts will measure the history of the expansion rate of the universe. Because this is a purely geometric measurement, it is insensitive to any form of evolution of objects or the necessity to understand the physics in the early universe. Thus, WLT was identified by the Dark Energy Task Force as perhaps the best method to measure the evolution of DE. To date, however, the conjecture of the DETF has not been experimentally verified, but will be by the proposed project. The primary reason for the lack of tomography measurements is that one must have an exceptional data-set to attempt the measurement. One needs both extremely good seeing (or space observations) in order to minimize the point spread function smearing corrections on weak lensing shear measurements and deep, multi-color data, from B to z, to measure reliable photometric redshifts of the background galaxies being lensed (which are typically too faint to obtain spectroscopic redshifts). Because the entire process from multi-drizzling the HST images, and then creating shear maps, to gathering the necessary ground based observations, to generating photo-zs and then carrying out the tomography is a complicated task, until the creation of our team, nobody has taken the time to connect all the levels of expertise necessary to carry out this project based on HST archival data. Our data are being used in 2 Ph.D. theses. Kellen Murphy, at Ohio University, is using the tomography data along with simulations in a thesis expected to be completed in Jun

  5. Chemical and petrological characteristics of the intrusive rocks of the Quitman Mountains, Texas

    E-Print Network [OSTI]

    Seay, Christopher Sidney

    1973-01-01T23:59:59.000Z

    differentiated rock types from the diorite (1) to the last emplaced granite (9). 42 7. Calcium concentration and fluorine concentration vs. the various differentiated rock types from the diorite (1) to the last emplaced granite (9) 8. Ca percentage plotted... concentration for the various rock types from the diorite (1) to the final granite (9). . . . . . . ~ 53 13. Rb/Sr ratios for the intrusive rock types 56 14. Uranium concentrations for the intrusive rock types for the initially emplaced diorite (1...

  6. MECHANICAL DEGRADATION OF EMPLACEMENT DRIFTS AT YUCCA MOUNTAIN - A CASE STUDY IN ROCK MECHANICS, PART 1: NONLITHOPHYSAL ROCK, PART 2: LITHOPHYSAL ROCK

    SciTech Connect (OSTI)

    M. Lin, D. Kicker, B. Damjanac, M. Board, and M. Karakouzian

    2006-02-27T23:59:59.000Z

    This paper outlines rock mechanics investigations associated with mechanical degradation of planned emplacement drifts at Yucca Mountain, which is the designated site for a US high-level nuclear waste repository. The factors leading to drift degradation include stresses from the overburden, stresses induced by the heat released from the emplaced waste, stresses due to seismically related ground motions, and time-dependent strength degradation. The welded tuff emplacement horizon consists of two groups of rock with distinct engineering properties: nonlithophysal units and lithophysal units, based on the relative proportion of lithophysal cavities. Part I of the paper concentrates on the generally hard, strong, and fractured nonlithophysal rock. The degradation behavior of the tunnels in the nonlithophysal rock is controlled by the occurrence of keyblocks. A statistically equivalent fracture model was generated based on extensive underground fracture mapping data from the Exploratory Studies Facility at Yucca Mountain. Three-dimensional distinct block analyses, generated with the fracture patterns randomly selected from the fracture model, were developed with the consideration of in situ, thermal, seismic loads. In this study, field data, laboratory data, and numerical analyses are well integrated to provide a solution for the unique problem of modeling drift degradation throughout the regulatory period for repository performance.

  7. Environmental assessment of remedial action at the slick rock Uranium Mill Tailings sites Slick Rock, Colorado

    SciTech Connect (OSTI)

    Not Available

    1994-09-01T23:59:59.000Z

    The Uranium Mill Tailings Radiation Control Act of 1978 (42 USC {section} 7901 et seq.), hereafter referred to as the UMTRCA, authorized the U.S. Department of Energy (DOE) to clean up two uranium mill tailings processing sites near Slick Rock, Colorado, in San Miguel County. The purpose of the cleanup is to reduce the potential health effects associated with the radioactive materials remaining on the sites and on vicinity properties (VPs) associated with the sites. Contaminated materials cover an estimated 55 acres of the Union Carbide (UC) processing site and 12 ac of the North Continent (NC) processing site. The total estimated volume of contaminated materials is approximately 61 8,300 cubic yards. In addition to the contamination in the two processing site areas, four VPs were found to contain contamination. As a result of the tailings being exposed to the environment, contamination associated with the UC and NC sites has leached into shallow ground water. Surface water has not been affected. The closest residence is approximately 0.3 air mi from either site. The proposed action is to remediate the UC and NC sites by removing all contaminated materials within the designated site boundaries or otherwise associated with the sites, and relocating them to, and stabilizing them at, a location approximately 5 road mi (8 km) northeast of the sites on land administered by the Bureau of Land Management (BLM). Remediation would be performed by the DOE`s Uranium Mill Tailings Remedial Action (UMTRA) Project. All solid contaminated materials would be buried under 5 feet (ft) of rock and soil materials. The proposed disposal site area is currently used by ranchers for cattle grazing over a 7-month period. The closest residence to the proposed disposal site is 2 air mi. An estimated 44 ac of land would be permanently transferred from the BLM to the DOE and restricted from future use.

  8. Robust statistical reconstruction for charged particle tomography

    DOE Patents [OSTI]

    2013-10-08T23:59:59.000Z

    Systems and methods for charged particle detection including statistical reconstruction of object volume scattering density profiles from charged particle tomographic data to determine the probability distribution of charged particle scattering using a statistical multiple scattering model and determine a substantially maximum likelihood estimate of object volume scattering density using expectation maximization (ML/EM) algorithm to reconstruct the object volume scattering density. The presence of and/or type of object occupying the volume of interest can be identified from the reconstructed volume scattering density profile. The charged particle tomographic data can be cosmic ray muon tomographic data from a muon tracker for scanning packages, containers, vehicles or cargo. The method can be implemented using a computer program which is executable on a computer.

  9. High energy neutron Computed Tomography developed

    E-Print Network [OSTI]

    be observed behind high-density materials, such as depleted uranium or tungsten. Comparison of the high (bottom half) and foam (center teeth) phantom could be viewed through 76 mm of depleted uranium. Some ~ 3

  10. Evaluation of the hot-dry-rock geothermal potential of an area near Mountain Home, Idaho

    SciTech Connect (OSTI)

    Arney, B.H.; Goff, F.

    1982-05-01T23:59:59.000Z

    Evaluation of an area near Mountain Home, Idaho, was performed to assess the hot dry rock (HDR) potential of the prospect. The techniques reported include telluric and gravity profiling, passive seismic, hydrology and water chemistry surveys, and lineament analysis. Gravity and telluric surveys were unsuccessful in locating fractures buried beneath recent volcanics and sediments of the plain because density and conductivity contrasts were insufficient. Gravity modeling indicated areas where granite was not likely to be within drilling depth, and telluric profiling revealed an area in the northwest part of the prospect where higher conductivity suggested the presence of fractures or water or both, thereby making it unsuitable for HDR. Water geochemistry indicated that (hot water) reservoir temperatures do not exceed 100/sup 0/C. An area in the east central part of the prospect was delineated as most favorable for HDR development. Temperature is expected to be 200/sup 0/C at 3-km depth, and granitic rock of the Idaho Batholith should be intersected at 2- to 3-km depth.

  11. Thermal Neutron Computed Tomography of Soil Water and Plant Roots

    E-Print Network [OSTI]

    Leanne G. Tumlinson; Hungyuan Liu; Wendy K. Silk; Jan W. Hopmans

    2007-01-01T23:59:59.000Z

    images in the McClellan Nuclear Radiation Center tomographyPap. NCT5. McClellan Nuclear Radiation Ctr. , Univ. of1991. McClellan Nuclear Radiation Center safety analysis

  12. Advances in Inverse Transport Methods and Applications to Neutron Tomography

    E-Print Network [OSTI]

    Wu, Zeyun

    2011-02-22T23:59:59.000Z

    and postulated constraints. We illustrate our approach using some neutron-tomography model problems that are several mean-free paths thick and contain highly scattering materials. In these problems we impose reasonable constraints, similar to those...

  13. Scattered neutron tomography based on a neutron transport problem

    E-Print Network [OSTI]

    Scipolo, Vittorio

    2005-11-01T23:59:59.000Z

    scattering objects because it does not adequately account for the scattering component of the neutron beam intensity exiting the sample. We proposed a new method of computed tomography which employs an inverse problem analysis of both the transmitted...

  14. Properties of Some Integral Transforms Arising in Tomography

    E-Print Network [OSTI]

    Moon, Sunghwan

    2013-10-11T23:59:59.000Z

    introduce a different Radon-type transform arising in photo acoustic tomography with circular detectors, and study mathematically similar object, a toroidal Radon transform. We also consider the cone transform arising in Compton camera imaging as well...

  15. 3D optical tomography in the presence of void regions

    E-Print Network [OSTI]

    Lorenzo, Jorge Ripoll

    reconstruction scheme for optical tomography based on the equation of radiative transfer," Med. Phys. 26 1698 and F. Wubbeling, Mathematical Methods in Image Reconstruction (SIAM, Philadel- phia, 2001). 15. J. Sch

  16. Functional lung imaging in humans using Positron Emission Tomography

    E-Print Network [OSTI]

    Layfield, Dominick, 1971-

    2003-01-01T23:59:59.000Z

    This thesis deals with a method of functional lung imaging using Positron Emission Tomography (PET). In this technique, a radioactive tracer, nitrogen-13, is dissolved in saline solution, and injected into a peripheral ...

  17. Time-dependent seismic tomography and its application to the...

    Open Energy Info (EERE)

    geothermal area, 1996-2006 Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Time-dependent seismic tomography and its application to...

  18. Purely optical tomography : atlas-based reconstruction of brain activation

    E-Print Network [OSTI]

    Custo, Anna

    2008-01-01T23:59:59.000Z

    Diffuse Optical Tomography (DOT) is a relatively new method used to image blood volume and oxygen saturation in vivo. Because of its relatively poor spatial resolution (typically no better than 1-2 cm), DOT is increasingly ...

  19. Anatomical atlas-guided diffuse optical tomography of brain activation

    E-Print Network [OSTI]

    Custo, Anna

    We describe a neuroimaging protocol that utilizes an anatomical atlas of the human head to guide diffuse optical tomography of human brain activation. The protocol is demonstrated by imaging the hemodynamic response to ...

  20. Ultrahigh speed optical coherence tomography for ophthalmic imaging applications

    E-Print Network [OSTI]

    Liu, Jonathan Jaoshin

    2014-01-01T23:59:59.000Z

    Optical coherence tomography (OCT) is a non-contact, non-invasive, micron-scale optical imaging technology that has become a standard clinical tool in ophthalmology. Fourier domain OCT detection methods have enabled higher ...

  1. Embrittlement of RPV steels; An atom probe tomography perspective

    SciTech Connect (OSTI)

    Miller, Michael K [ORNL; Russell, Kaye F [ORNL

    2007-01-01T23:59:59.000Z

    Atom probe tomography has played a key role in the understanding of the embrittlement of neutron irradiated reactor pressure vessel steels through the atomic level characterization of the microstructure. Atom probe tomography has been used to demonstrate the importance of the post weld stress relief treatment in reducing the matrix copper content in high copper alloys, the formation of {approx}-nm-diameter copper-, nickel-, manganese- and silicon-enriched precipitates during neutron irradiation in copper containing RPV steels, and the coarsening of these precipitates during post irradiation heat treatments. Atom probe tomography has been used to detect {approx}2-nm-diameter nickel-, silicon- and manganese-enriched clusters in neutron irradiated low copper and copper free alloys. Atom probe tomography has also been used to quantify solute segregation to, and precipitation on, dislocations and grain boundaries.

  2. Microwave-induced thermoacoustic tomography: reconstruction by synthetic aperture

    E-Print Network [OSTI]

    Feng, Dazi

    2001-01-01T23:59:59.000Z

    We have applied the synthetic-aperture method to linear-scanning microwave-induced thermoacoustic tomography in biological tissues. A non-focused ultrasonic transducer was used to receive thermoacoustic signals, to which the delay-and-sum algorithm...

  3. Spherical radon transforms and mathematical problems of thermoacoustic tomography

    E-Print Network [OSTI]

    Ambartsoumian, Gaik

    2009-06-02T23:59:59.000Z

    including approximation theory, integral geometry, inverse problems for PDEs, etc. In Chapter I we give a brief description of thermoacoustic tomography (TAT or TCT) and introduce the SRT. In Chapter II we consider the injectivity problem for SRT. A major...

  4. Iron oxide nanoparticles as a contrast agent for thermoacoustic tomography

    E-Print Network [OSTI]

    Keho, Aaron Lopez

    2009-06-02T23:59:59.000Z

    An exogenous contrast agent has been developed to enhance the contrast achievable in Thermoacoustic Tomography (TAT). TAT utilizes the penetration depth of microwave energy while producing high resolution images through acoustic waves. A sample...

  5. Development and application of a 4-dimensional Computed Tomography simulator

    E-Print Network [OSTI]

    Chu, Alan

    2007-01-01T23:59:59.000Z

    This thesis presents the development and application of a 4-Dimensional Computed Tomography (4D CT) simulation program. The simulation is used to understand and quantify the sources of image artifacts that arise from ...

  6. Scattered neutron tomography based on a neutron transport problem

    E-Print Network [OSTI]

    Scipolo, Vittorio

    2005-11-01T23:59:59.000Z

    scattering objects because it does not adequately account for the scattering component of the neutron beam intensity exiting the sample. We proposed a new method of computed tomography which employs an inverse problem analysis of both the transmitted...

  7. Revisiting Stopping Rules for Iterative Methods used in Emission Tomography

    E-Print Network [OSTI]

    Renaut, Rosemary

    Stopping Rules for Iterative Methods used in Emission Tomography Hongbin Guo,a, Rosemary A Renautb a Insta.guo@gmail.com (Hongbin Guo) Preprint submitted to Computerized Medical Imaging and Graphics September 28, 2010

  8. aids computed tomography: Topics by E-print Network

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

    8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Computer-aided diagnosis of rheumatoid arthritis with optical tomography, Part Computer...

  9. Proceedings of the scientific visit on crystalline rock repository development.

    SciTech Connect (OSTI)

    Mariner, Paul E.; Hardin, Ernest L.; Miksova, Jitka [RAWRA, Czech Republic

    2013-02-01T23:59:59.000Z

    A scientific visit on Crystalline Rock Repository Development was held in the Czech Republic on September 24-27, 2012. The visit was hosted by the Czech Radioactive Waste Repository Authority (RAWRA), co-hosted by Sandia National Laboratories (SNL), and supported by the International Atomic Energy Agency (IAEA). The purpose of the visit was to promote technical information exchange between participants from countries engaged in the investigation and exploration of crystalline rock for the eventual construction of nuclear waste repositories. The visit was designed especially for participants of countries that have recently commenced (or recommenced) national repository programmes in crystalline host rock formations. Discussion topics included repository programme development, site screening and selection, site characterization, disposal concepts in crystalline host rock, regulatory frameworks, and safety assessment methodology. Interest was surveyed in establishing a %E2%80%9Cclub,%E2%80%9D the mission of which would be to identify and address the various technical challenges that confront the disposal of radioactive waste in crystalline rock environments. The idea of a second scientific visit to be held one year later in another host country received popular support. The visit concluded with a trip to the countryside south of Prague where participants were treated to a tour of the laboratory and underground facilities of the Josef Regional Underground Research Centre.

  10. Potential for tunneling based on rock and soil melting. Abstracts

    SciTech Connect (OSTI)

    Rowley, J.C.

    1985-01-01T23:59:59.000Z

    The rock-melting drill was invented at Los Alamos Scientific Laboratory in 1960. Electrically heated, laboratory-scale drills were subsequently shown to penetrate igneous rocks at usefully high rates, with moderate power consumptions. The development of compact nuclear reactors and of heat pipes now makes possible the extension of this technology to much larger melting penetrators, potentially capable of producing holes up to several meters in diameter and several tens of kilometers long or deep. Development of a rapid, versatile, economical method of boring large, long shafts and tunnels offers solutions to many of man's most urgent ecological, scientific, raw-materials, and energy-supply problems. A melting method appears to be the most promising and flexible means of producing such holes. It is relatively insensitive to the composition, hardness, structure, and temperature of the rock, and offers the possibilities of producing self-supporting, glass-lined holes in almost any formation and (using a technique called lithofracturing) of eliminating the debris-removal problem by forcing molten rock into cracks created in the bore wall. Large rock-melting penetrators, called Electric Subterrenes or Nuclear Subterrenes according to the energy source used, are discussed in this report, together with problems anticipated in their development. It is concluded that this development is within the grasp of present technology.

  11. Mechanical interaction between rock, buffer and canister in repositories

    SciTech Connect (OSTI)

    Borgesson, L. [Clay Technology AB, Lund (Sweden)

    1993-12-31T23:59:59.000Z

    The bentonite clay buffer, which is used in the repository concept of Sweden as well as many other countries, has an important role for mechanical protection of the canister. Of special interest is the effect of a rock shear, i.e. displacement of the rock along a fracture intersecting the deposition hole, on the canister. The article shows the results of some FEM calculations of a rock shear when the new composite copper/steel canister, is used. The effect of the swelling pressure from the bentonite before shear and the effect of a symmetric as well as an asymmetric rock shear will be shown. The calculations have been preceded by extensive laboratory tests and verification calculations by which material models for the buffer and proper calculation techniques have been developed. The material model for the clay is an elastic plastic model in which porous elasticity, based on the effective stress theory, is combined with Drucker-Prager plasticity. The results indicate that the bentonite clay acts as a very good mechanical buffer against such rock displacements. Although plastic yielding may occur, mainly in the copper, the plastic strain is not more than a few percent just after the shear.

  12. Mesozoic and Cenozoic rocks from Malta Escarpment (central Mediterranean)

    SciTech Connect (OSTI)

    Scandone, P. (Istituto di Geologia e Paleontologia, Pisa, Italy); Patacca, E.; Radoicic, R.; Ryan, W.B.F.; Cita, M.B.; Rawson, M.; Chezar, H.; Miller, E.; McKenzie, J.; Rossi, S.

    1981-07-01T23:59:59.000Z

    Sedimentary rocks of Triassic-Neogene age are present on the Malta Escarpment of the eastern Mediterranean. Upper Triassic dolomitic limestones of shallow-water origin, at depths between 2.5 and 3.5 km, are similar in lithofacies to coeval platform carbonates of the Siracusa (Syracuse) belt of southern Sicily. Jurassic rocks include lower-middle Liassic shallow-water limestones followed by condensed hemipelagic lime deposits indicative of sinking and starving of the former platform. Cretaceous materials are represented by both red marls rich in planktonic faunas and reworkd volcaniclastic breccias including shallow-water skeletal material. Paleogene rocks are both shallow-water limestones with corals, algae, and bivalves, and redeposited calcarenites of lithofacies similar to those from surface and subsurface of the Ragusa zone. Oligocene-lower Miocene rocks from the escarpment are also similar in lithology to the coeval Ragusa deposits. Tortonian is represented by hemipelagic marls indicating open-marine environment. Pervasive dolomitization on lime crusts and on initial-stage fissure fillings with strongly positive isotopic oxygen ratio is thought to be a product of Messinian evaporitic drawdown. Pliocene sediments belong to the Trubi facies and consist of pelagic foraminiferal chalk. An impressive vertical relief existed by Miocene times, as attested by Messinian crusts and veins on or in rocks as old as Late Triassic. Our data do not provide evidence that this morphologic feature necessarily coincides with a continent-ocean transition. The present escarpment was produced by faulting, erosion, and defacement. 14 figures, 1 table.

  13. Assessment of the relationship between stenosis severity and distribution of coronary artery stenoses on multislice computed tomographic angiography and myocardial ischemia detected by single photon emission computed tomography

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    photon emission computed tomography Balaji K. Tamarappoo,of 64-slice computed tomography coronary angiography: Aphoton emission computed tomography for the prediction of

  14. Does High Body Mass Index Obviate the Need for Oral Contrast for Abdominal-Pelvic Computed Tomography in Emergency Department Patients?

    E-Print Network [OSTI]

    Harrison, Matthew Lee; Lizotte, Paul E; Holmes, Talmage M; Kenney, Phillip J; Buckner, Charles Barry; Shah, Hemendra R

    2013-01-01T23:59:59.000Z

    1. Brenner DJ, Hall EJ. Computed Tomography. An Increasingis necessary for the computed tomography diagnosis ofto read a computed tomography (CT) of the abdomen and

  15. Optimal phase for coronary interpretations and correlation of ejection fraction using late-diastole and end-diastole imaging in cardiac computed tomography angiography: implications for prospective triggering

    E-Print Network [OSTI]

    2009-01-01T23:59:59.000Z

    of multidetector computed tomography versus echocardiog-diastole imaging in cardiac computed tomography angiography:multi- row detector computed tomography (MDCT) angiog- raphy

  16. Modeling pure methane hydrate dissociation using a numerical simulator from a novel combination of X-ray computed tomography and macroscopic data

    E-Print Network [OSTI]

    Gupta, A.

    2010-01-01T23:59:59.000Z

    Combination of X-ray Computed Tomography and Macroscopicdissociation data. X-ray computed tomography (CT) was usedobtained from x-ray computed tomography analysis combined

  17. Assessment of the relationship between stenosis severity and distribution of coronary artery stenoses on multislice computed tomographic angiography and myocardial ischemia detected by single photon emission computed tomography

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    of 64-slice computed tomography coronary angiography: Aphoton emission computed tomography for the prediction ofphoton emission computed tomography. Circu- lation 2003;107:

  18. Ultrasonic Tomography for Detecting and Locating Defects in Concrete Structures

    E-Print Network [OSTI]

    White, Joshua

    2012-07-16T23:59:59.000Z

    acquisition has grown from single-point 3 3 evaluations to automated scanning of larger areas (Streicher et al. 2006; De La Haza et al. n.d.). The tomography system used in this proposed research belongs to this family of phased-array transducers... at ACS working in collaboration with the Federal Institute of Materials Research and Testing in Berlin, Germany (BAM), developed the first ultrasonic tomography system that required no coupling agent (Acoustic Control Systems n.d.). The tomograph, a...

  19. Multiporosity Flow in Fractured Low-Permeability Rocks

    E-Print Network [OSTI]

    Kuhlman, Kristopher L; Heath, Jason E

    2015-01-01T23:59:59.000Z

    A multiporosity extension of classical double and triple porosity fractured rock flow models for slightly compressible fluids is presented. The multiporosity model is an adaptation of the multirate solute transport model of Haggerty and Gorelick (1995) to viscous flow in fractured rock reservoirs. It is a generalization of both pseudo-steady-state and transient interporosity flow double porosity models. The model includes a fracture continuum and an overlapping distribution of multiple rock matrix continua, whose fracture-matrix exchange coefficients are specified through a discrete probability mass function. Semi-analytical cylindrically symmetric solutions to the multiporosity mathematical model are developed using the Laplace transform to illustrate its behavior. The multiporosity model presented here is conceptually simple, yet flexible enough to simulate common conceptualizations of double and triple porosity flow. This combination of generality and simplicity makes the multiporosity model a good choice ...

  20. Superhard nanophase cutter materials for rock drilling applications

    SciTech Connect (OSTI)

    Voronov, O.; Tompa, G.; Sadangi, R.; Kear, B.; Wilson, C.; Yan, P.

    2000-06-23T23:59:59.000Z

    The Low Pressure-High Temperature (LPHT) System has been developed for sintering of nanophase cutter and anvil materials. Microstructured and nanostructured cutters were sintered and studied for rock drilling applications. The WC/Co anvils were sintered and used for development of High Pressure-High Temperature (HPHT) Systems. Binderless diamond and superhard nanophase cutter materials were manufactured with help of HPHT Systems. The diamond materials were studied for rock machining and drilling applications. Binderless Polycrystalline Diamonds (BPCD) have high thermal stability and can be used in geothermal drilling of hard rock formations. Nanophase Polycrystalline Diamonds (NPCD) are under study in precision machining of optical lenses. Triphasic Diamond/Carbide/Metal Composites (TDCC) will be commercialized in drilling and machining applications.

  1. High Energy Density Capacitors

    SciTech Connect (OSTI)

    None

    2010-07-01T23:59:59.000Z

    BEEST Project: Recapping is developing a capacitor that could rival the energy storage potential and price of todays best EV batteries. When power is needed, the capacitor rapidly releases its stored energy, similar to lightning being discharged from a cloud. Capacitors are an ideal substitute for batteries if their energy storage capacity can be improved. Recapping is addressing storage capacity by experimenting with the material that separates the positive and negative electrodes of its capacitors. These separators could significantly improve the energy density of electrochemical devices.

  2. SEISMIC AND ROCK PHYSICS DIAGNOSTICS OF MULTISCALE RESERVOIR TEXTURES

    SciTech Connect (OSTI)

    Gary Mavko

    2003-10-01T23:59:59.000Z

    As part of our study on ''Relationships between seismic properties and rock microstructure'', we have (1) Studied relationships between velocity and permeability. (2) Used independent experimental methods to measure the elastic moduli of clay minerals as functions of pressure and saturation. (3) Applied different statistical methods for characterizing heterogeneity and textures from scanning acoustic microscope (SAM) images of shale microstructures. (4) Analyzed the directional dependence of velocity and attenuation in different reservoir rocks (5) Compared Vp measured under hydrostatic and non-hydrostatic stress conditions in sands. (6) Studied stratification as a source of intrinsic anisotropy in sediments using Vp and statistical methods for characterizing textures in sands.

  3. 3D structural fluctuation of IgG1 antibody revealed by individual particle electron tomography

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

    Zhang, Xing [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Xi'an Jiaotong Univ., Xi'an, Shaanxi (China); Zhang, Lei [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Tong, Huimin [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Peng, Bo [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Rames, Matthew J. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Zhang, Shengli [Xi'an Jiaotong Univ., Xi'an, Shaanxi (China); Ren, Gang [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

    2015-05-05T23:59:59.000Z

    Commonly used methods for determining protein structure, including X-ray crystallography and single-particle reconstruction, often provide a single and unique three-dimensional (3D) structure. However, in these methods, the protein dynamics and flexibility/fluctuation remain mostly unknown. Here, we utilized advances in electron tomography (ET) to study the antibody flexibility and fluctuation through structural determination of individual antibody particles rather than averaging multiple antibody particles together. Through individual-particle electron tomography (IPET) 3D reconstruction from negatively-stained ET images, we obtained 120 ab-initio 3D density maps at an intermediate resolution (~13 nm) from 120 individual IgG1 antibody particles. Using these maps as a constraint, we derived 120 conformations of the antibody via structural flexible docking of the crystal structure to these maps by targeted molecular dynamics simulations. Statistical analysis of the various conformations disclosed the antibody 3D conformational flexibility through the distribution of its domain distances and orientations. This blueprint approach, if extended to other flexible proteins, may serve as a useful methodology towards understanding protein dynamics and functions.

  4. 3D structural fluctuation of IgG1 antibody revealed by individual particle electron tomography

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

    Zhang, Xing; Zhang, Lei; Tong, Huimin; Peng, Bo; Rames, Matthew J.; Zhang, Shengli; Ren, Gang

    2015-05-05T23:59:59.000Z

    Commonly used methods for determining protein structure, including X-ray crystallography and single-particle reconstruction, often provide a single and unique three-dimensional (3D) structure. However, in these methods, the protein dynamics and flexibility/fluctuation remain mostly unknown. Here, we utilized advances in electron tomography (ET) to study the antibody flexibility and fluctuation through structural determination of individual antibody particles rather than averaging multiple antibody particles together. Through individual-particle electron tomography (IPET) 3D reconstruction from negatively-stained ET images, we obtained 120 ab-initio 3D density maps at an intermediate resolution (~13 nm) from 120 individual IgG1 antibody particles. Using these maps as a constraint, wemorederived 120 conformations of the antibody via structural flexible docking of the crystal structure to these maps by targeted molecular dynamics simulations. Statistical analysis of the various conformations disclosed the antibody 3D conformational flexibility through the distribution of its domain distances and orientations. This blueprint approach, if extended to other flexible proteins, may serve as a useful methodology towards understanding protein dynamics and functions.less

  5. Gluon density in nuclei

    SciTech Connect (OSTI)

    Ayala, A.L. [Rio Grande do Sul Univ., Porto Alegre, RS (Brazil). Inst. de Fisica][Pelotas Univ., RS (Brazil). Inst. de Fisica e Matematica; Ducati, M.B.G. [Rio Grande do Sul Univ., Porto Alegre, RS (Brazil). Inst. de Fisica; Levin, E.M. [Fermi National Accelerator Lab., Batavia, IL (United States)][Nuclear Physics Inst., St. Petersburg (Russian Federation)

    1996-10-01T23:59:59.000Z

    In this talk we present our detailed study (theory and numbers) on the shadowing corrections to the gluon structure functions for nuclei. Starting from rather controversial information on the nucleon structure function which is originated by the recent HERA data, we develop the Glauber approach for the gluon density in a nucleus based on Mueller formula and estimate the value of the shadowing corrections in this case. Then we calculate the first corrections to the Glauber approach and show that these corrections are big. Based on this practical observation we suggest the new evolution equation which takes into account the shadowing corrections and solve it. We hope to convince you that the new evolution equation gives a good theoretical tool to treat the shadowing corrections for the gluons density in a nucleus and, therefore, it is able to provide the theoretically reliable initial conditions for the time evolution of the nucleus-nucleus cascade. The initial conditions should be fixed both theoretically and phenomenologically before to attack such complicated problems as the mixture of hard and soft processes in nucleus-nucleus interactions at high energy or the theoretically reliable approach to hadron or/and parton cascades for high energy nucleus-nucleus interaction. 35 refs., 24 figs., 1 tab.

  6. A Detector for Proton Computed Tomography

    SciTech Connect (OSTI)

    Blazey, G.; et al.,

    2013-12-06T23:59:59.000Z

    Radiation therapy is a widely recognized treatment for cancer. Energetic protons have distinct features that set them apart from photons and make them desirable for cancer therapy as well as medical imaging. The clinical interest in heavy ion therapy is due to the fact that ions deposit almost all of their energy in a sharp peak the Bragg peak- at the very end of their path. Proton beams can be used to precisely localize a tumor and deliver an exact dose to the tumor with small doses to the surrounding tissue. Proton computed tomography (pCT) provides direct information on the location on the target tumor, and avoids position uncertainty caused by treatment planning based on imaging with X-ray CT. The pCT project goal is to measure and reconstruct the proton relative stopping power distribution directly in situ. To ensure the full advantage of cancer treatment with 200 MeV proton beams, pCT must be realized.

  7. Nonlinear regularization techniques for seismic tomography

    SciTech Connect (OSTI)

    Loris, I. [Mathematics Department, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels (Belgium)], E-mail: igloris@vub.ac.be; Douma, H. [Department of Geosciences, Princeton University, Guyot Hall, Washington Road, Princeton, NJ 08544 (United States); Nolet, G. [Geosciences Azur, Universite de Nice-Sophia Antipolis, CNRS/IRD, 250 Rue Albert Einstein, Sophia Antipolis 06560 (France); Daubechies, I. [Program in Applied and Computational Mathematics, Princeton University, Fine Hall, Washington Road, Princeton, NJ 08544 (United States); Regone, C. [BP America Inc., 501 Westlake Park Blvd., Houston, TX 77079 (United States)

    2010-02-01T23:59:59.000Z

    The effects of several nonlinear regularization techniques are discussed in the framework of 3D seismic tomography. Traditional, linear, l{sub 2} penalties are compared to so-called sparsity promoting l{sub 1} and l{sub 0} penalties, and a total variation penalty. Which of these algorithms is judged optimal depends on the specific requirements of the scientific experiment. If the correct reproduction of model amplitudes is important, classical damping towards a smooth model using an l{sub 2} norm works almost as well as minimizing the total variation but is much more efficient. If gradients (edges of anomalies) should be resolved with a minimum of distortion, we prefer l{sub 1} damping of Daubechies-4 wavelet coefficients. It has the additional advantage of yielding a noiseless reconstruction, contrary to simple l{sub 2} minimization ('Tikhonov regularization') which should be avoided. In some of our examples, the l{sub 0} method produced notable artifacts. In addition we show how nonlinear l{sub 1} methods for finding sparse models can be competitive in speed with the widely used l{sub 2} methods, certainly under noisy conditions, so that there is no need to shun l{sub 1} penalizations.

  8. Hot dry rock energy: Hot dry rock geothermal development program. Progress report. Fiscal year 1993

    SciTech Connect (OSTI)

    Salazar, J.; Brown, M. [eds.

    1995-03-01T23:59:59.000Z

    Extended flow testing at the Fenton Hill Hot Dry Rock (HDR) test facility concluded in Fiscal Year 1993 with the completion of Phase 2 of the long-term flow test (LTFT) program. As is reported in detail in this report, the second phase of the LTFT, although only 55 days in duration, confirmed in every way the encouraging test results of the 112-day Phase I LTFT carried out in Fiscal Year 1992. Interim flow testing was conducted early in FY 1993 during the period between the two LTFT segments. In addition, two brief tests involving operation of the reservoir on a cyclic schedule were run at the end of the Phase 2 LTFT. These interim and cyclic tests provided an opportunity to conduct evaluations and field demonstrations of several reservoir engineering concepts that can now be applied to significantly increase the productivity of HDR systems. The Fenton Hill HDR test facility was shut down and brought into standby status during the last part of FY 1993. Unfortunately, the world`s largest, deepest, and most productive HDR reservoir has gone essentially unused since that time.

  9. Environmental assessment of remedial action at the Slick Rock uranium mill tailings sites, Slick Rock, Colorado

    SciTech Connect (OSTI)

    NONE

    1995-01-01T23:59:59.000Z

    The Uranium Mill Tailings Radiation Control Act of 1978, hereafter referred to as the UMTRCA, authorized the US Department of Energy (DOE) to clean up two uranium mill tailings processing sites near Slick Rock, Colorado, in San Miguel County. The purpose of the cleanup is to reduce the potential health effects associated with the radioactive materials remaining on the processing sites and on vicinity properties (VPs) associated with the sites. The US Environmental Protection Agency (EPA) promulgated standards for the UMTRCA that contained measures to control the contaminated materials and to protect the ground water from further degradation. The sites contain concrete foundations of mill buildings, tailings piles, and areas contaminated by windblown and waterborne radioactive tailings materials. The proposed action is to remediate the UC and NC sites by removing all contaminated materials within the designated site boundaries or otherwise associated with the sites, and relocating them to, and stabilizing them at, a location approximately 5 road mi (8 km) northeast of the processing sites on land administered by the US Bureau of Land Management (BLM). Remediation would be performed by the DOE`s Uranium Mill Tailings Remedial Action (UMTRA) Project.

  10. Quantum tomography with wavelet transform in Banach space on Homogeneous space

    E-Print Network [OSTI]

    M. A. Jafarizadeh; M. Mirzaee; M. Rezaee

    2008-01-25T23:59:59.000Z

    The intimate connection between the Banach space wavelet reconstruction method on homogeneous spaces with both singular and nonsingular vacuum vectors, and some of well known quantum tomographies, such as: Moyal-representation for a spin, discrete phase space tomography, tomography of a free particle, Homodyne tomography, phase space tomography and SU(1,1) tomography is explained. Also both the atomic decomposition and banach frame nature of these quantum tomographic examples is explained in details. Finally the connection between the wavelet formalism on Banach space and Q-function is discussed.

  11. Low density microcellular foams

    DOE Patents [OSTI]

    LeMay, James D. (Castro Valley, CA)

    1991-01-01T23:59:59.000Z

    Disclosed is a process of producing microcellular foam which comprises the steps of: (a) selecting a multifunctional epoxy oligomer resin; (b) mixing said epoxy resin with a non-reactive diluent to form a resin-diluent mixture; (c) forming a diluent containing cross-linked epoxy gel from said resin-diluent mixture; (d) replacing said diluent with a solvent therefore; (e) replacing said solvent with liquid carbon dioxide; and (f) vaporizing off said liquid carbon dioxide under supercritical conditions, whereby a foam having a density in the range of 35-150 mg/cc and cell diameters less than about 1 .mu.m is produced. Also disclosed are the foams produced by the process.

  12. Low density microcellular foams

    DOE Patents [OSTI]

    LeMay, James D. (Castro Valley, CA)

    1992-01-01T23:59:59.000Z

    Disclosed is a process of producing microcellular from which comprises the steps of: (a) selecting a multifunctional epoxy oligomer resin; (b) mixing said epoxy resin with a non-reactive diluent to form a resin-diluent mixture; (c) forming a diluent containing cross-linked epoxy gel from said resin-diluent mixture; (d) replacing said diluent with a solvent therefore; (e) replacing said solvent with liquid carbon dioxide; and (f) vaporizing off said liquid carbon dioxide under supercritical conditions, whereby a foam having a density in the range of 35-150 mg/cc and cell diameters less than about 1 .mu.m is produced. Also disclosed are the foams produced by the process.

  13. Density constrained TDHF

    E-Print Network [OSTI]

    Oberacker, V E

    2015-01-01T23:59:59.000Z

    In this manuscript we provide an outline of the numerical methods used in implementing the density constrained time-dependent Hartree-Fock (DC-TDHF) method and provide a few examples of its application to nuclear fusion. In this approach, dynamic microscopic calculations are carried out on a three-dimensional lattice and there are no adjustable parameters, the only input is the Skyrme effective NN interaction. After a review of the DC-TDHF theory and the numerical methods, we present results for heavy-ion potentials $V(R)$, coordinate-dependent mass parameters $M(R)$, and precompound excitation energies $E^{*}(R)$ for a variety of heavy-ion reactions. Using fusion barrier penetrabilities, we calculate total fusion cross sections $\\sigma(E_\\mathrm{c.m.})$ for reactions between both stable and neutron-rich nuclei. We also determine capture cross sections for hot fusion reactions leading to the formation of superheavy elements.

  14. Low density microcellular foams

    DOE Patents [OSTI]

    LeMay, J.D.

    1991-11-19T23:59:59.000Z

    Disclosed is a process of producing microcellular foam which comprises the steps of: (a) selecting a multifunctional epoxy oligomer resin; (b) mixing said epoxy resin with a non-reactive diluent to form a resin-diluent mixture; (c) forming a diluent containing cross-linked epoxy gel from said resin-diluent mixture; (d) replacing said diluent with a solvent therefore; (e) replacing said solvent with liquid carbon dioxide; and (f) vaporizing off said liquid carbon dioxide under supercritical conditions, whereby a foam having a density in the range of 35-150 mg/cc and cell diameters less than about 1 [mu]m is produced. Also disclosed are the foams produced by the process. 8 figures.

  15. Nuclear Energy Density Optimization

    E-Print Network [OSTI]

    M. Kortelainen; T. Lesinski; J. Mor; W. Nazarewicz; J. Sarich; N. Schunck; M. V. Stoitsov; S. Wild

    2010-05-27T23:59:59.000Z

    We carry out state-of-the-art optimization of a nuclear energy density of Skyrme type in the framework of the Hartree-Fock-Bogoliubov (HFB) theory. The particle-hole and particle-particle channels are optimized simultaneously, and the experimental data set includes both spherical and deformed nuclei. The new model-based, derivative-free optimization algorithm used in this work has been found to be significantly better than standard optimization methods in terms of reliability, speed, accuracy, and precision. The resulting parameter set UNEDFpre results in good agreement with experimental masses, radii, and deformations and seems to be free of finite-size instabilities. An estimate of the reliability of the obtained parameterization is given, based on standard statistical methods. We discuss new physics insights offered by the advanced covariance analysis.

  16. A constrained variable projection reconstruction method for photoacoustic computed tomography without accurate knowledge of transducer responses

    E-Print Network [OSTI]

    Sheng, Qiwei; Matthews, Thomas P; Xia, Jun; Zhu, Liren; Wang, Lihong V; Anastasio, Mark A

    2015-01-01T23:59:59.000Z

    Photoacoustic computed tomography (PACT) is an emerging computed imaging modality that exploits optical contrast and ultrasonic detection principles to form images of the absorbed optical energy density within tissue. When the imaging system employs conventional piezoelectric ultrasonic transducers, the ideal photoacoustic (PA) signals are degraded by the transducers' acousto-electric impulse responses (EIRs) during the measurement process. If unaccounted for, this can degrade the accuracy of the reconstructed image. In principle, the effect of the EIRs on the measured PA signals can be ameliorated via deconvolution; images can be reconstructed subsequently by application of a reconstruction method that assumes an idealized EIR. Alternatively, the effect of the EIR can be incorporated into an imaging model and implicitly compensated for during reconstruction. In either case, the efficacy of the correction can be limited by errors in the assumed EIRs. In this work, a joint optimization approach to PACT image r...

  17. Atomic Scale Characterization of Compound Semiconductors using Atom Probe Tomography: Preprint

    SciTech Connect (OSTI)

    Gorman, B. P.; Guthrey, H.; Norman, A. G.; Al-Jassim, M.; Lawrence, D.; Prosa, T.

    2011-07-01T23:59:59.000Z

    Internal interfaces are critical in determining the performance of III-V multijunction solar cells. Studying these interfaces with atomic resolution using a combination of transmission electron microscopy (TEM), atom probe tomography (APT), and density functional calculations enables a more fundamental understanding of carrier dynamics in photovoltaic (PV) device structures. To achieve full atomic scale spatial and chemical resolution, data acquisition parameters in laser pulsed APT must be carefully studied to eliminate surface diffusion. Atom probe data with minimized group V ion clustering and expected stoichiometry can be achieved by adjusting laser pulse power, pulse repetition rate, and specimen preparation parameters such that heat flow away from the evaporating surface is maximized. Applying these improved analysis conditions to III-V based PV gives an atomic scale understanding of compositional and dopant profiles across interfaces and tunnel junctions and the initial stages of alloy clustering and dopant accumulation. Details on APT experimental methods and future in-situ instrumentation developments are illustrated.

  18. Quantum State and Process Tomography of Energy Transfer Systems via Ultrafast Spectroscopy

    E-Print Network [OSTI]

    Joel Yuen-Zhou; Jacob J. Krich; Masoud Mohseni; Aln Aspuru-Guzik

    2011-10-28T23:59:59.000Z

    The description of excited state dynamics in multichromophoric systems constitutes both a theoretical and experimental challenge in modern physical chemistry. An experimental protocol which can systematically characterize both coherent and dissipative processes at the level of the evolving quantum state of the chromophores is desired. In this article, we show that a carefully chosen set of polarization controlled two-color heterodyned photon-echo experiments can be used to reconstruct the time-evolving density matrix of the one-exciton manifold of a heterodimer. This possibility in turn allows for a complete description of the excited state dynamics via quantum process tomography (QPT). Calculations on the dimer show that QPT can reveal rich information about system-bath interactions, which otherwise appear nontrivially hidden in the polarization monitored in standard four-wave mixing experiments. Our study presents a novel method for analyzing condensed phase experiments with a quantum information processing perspective.

  19. Thermoacoustic tomography with detectors on an open curve: an efficient reconstruction algorithm

    E-Print Network [OSTI]

    Kunyansky, Leonid

    2008-01-01T23:59:59.000Z

    Practical applications of thermoacoustic tomography require numerical inversion of the spherical mean Radon transform with the centers of integration spheres occupying an open surface. Solution of this problem is needed (both in 2-D and 3-D) because frequently the region of interest cannot be completely surrounded by the detectors, as it happens, for example, in breast imaging. We present an efficient numerical algorithm for solving this problem in 2-D (similar methods are applicable in the 3-D case). Our method is based on the numerical approximation of plane waves by certain single layer potentials related to the acquisition geometry. After the densities of these potentials have been precomputed, each subsequent image reconstruction has the complexity of the regular filtration backprojection algorithm for the classical Radon transform. The peformance of the method is demonstrated in several numerical examples: one can see that the algorithm produces very accurate reconstructions if the data are accurate and...

  20. Low density microcellular foams

    DOE Patents [OSTI]

    Aubert, James H. (Albuquerque, NM); Clough, Roger L. (Albuquerque, NM); Curro, John G. (Placitas, NM); Quintana, Carlos A. (Albuquerque, NM); Russick, Edward M. (Albuquerque, NM); Shaw, Montgomery T. (Mansfield Center, CT)

    1987-01-01T23:59:59.000Z

    Low density, microporous polymer foams are provided by a process which comprises forming a solution of polymer and a suitable solvent followed by rapid cooling of the solution to form a phase-separated system and freeze the phase-separated system. The phase-separated system comprises a polymer phase and a solvent phase, each of which is substantially continuous within the other. The morphology of the polymer phase prior to and subsequent to freezing determine the morphology of the resultant foam. Both isotropic and anisotropic foams can be produced. If isotropic foams are produced, the polymer and solvent are tailored such that the solution spontaneously phase-separates prior to the point at which any component freezes. The morphology of the resultant polymer phase determines the morphology of the resultant foam and the morphology of the polymer phase is retained by cooling the system at a rate sufficient to freeze one or both components of the system before a change in morphology can occur. Anisotropic foams are produced by forming a solution of polymer and solvent that will not phase separate prior to freezing of one or both components of the solution. In such a process, the solvent typically freezes before phase separation occurs. The morphology of the resultant frozen two-phase system determines the morphology of the resultant foam. The process involves subjecting the solution to essentially one-dimensional cooling. Means for subjecting such a solvent to one-dimensional cooling are also provided. Foams having a density of less than 0.1 g/cc and a uniform cell size of less than 10 .mu.m and a volume such that the foams have a length greater than 1 cm are provided.

  1. Low density microcellular foams

    DOE Patents [OSTI]

    Aubert, J.H.; Clough, R.L.; Curro, J.G.; Quintana, C.A.; Russick, E.M.; Shaw, M.T.

    1985-10-02T23:59:59.000Z

    Low density, microporous polymer foams are provided by a process which comprises forming a solution of polymer and a suitable solvent followed by rapid cooling of the solution to form a phase-separated system and freeze the phase-separated system. The phase-separated system comprises a polymer phase and a solvent phase, each of which is substantially continuous within the other. The morphology of the polymer phase prior to and subsequent to freezing determine the morphology of the resultant foam. Both isotropic and anisotropic foams can be produced. If isotropic foams are produced, the polymer and solvent are tailored such that the solution spontaneously phase-separates prior to the point at which any component freezes. The morphology of the resultant polymer phase determines the morphology of the reusltant foam and the morphology of the polymer phase is retained by cooling the system at a rate sufficient to freeze one or both components of the system before a change in morphology can occur. Anisotropic foams are produced by forming a solution of polymer and solvent that will not phase separate prior to freezing of one or both components of the solution. In such a process, the solvent typically freezes before phase separation occurs. The morphology of the resultant frozen two-phase system determines the morphology of the resultant foam. The process involves subjecting the solution to essentially one-dimensional cooling. Foams having a density of less than 0.1 g/cc and a uniform cell size of less than 10 ..mu..m and a volume such that the foams have a length greater than 1 cm are provided.

  2. ACG Practical Rock Mechanics and Ground Support in Mining Courses

    E-Print Network [OSTI]

    Tobar, Michael

    CENTRE FOR GEOMECHANICS Ph: +61 8 6488 3300 Fax: +61 8 6488 1130 info for Geomechanics. Practical Rock Mechanics (Introduction) Short Course 2829 July 2014 Course objectives This course is designed to develop specific underground mining geomechanics competencies for mine geologists

  3. SEISMIC AND ROCK PHYSICS DIAGNOSTICS OF MULTISCALE RESERVOIR TEXTURES

    SciTech Connect (OSTI)

    Gary Mavko

    2003-06-30T23:59:59.000Z

    As part of our study on ''Relationships between seismic properties and rock microstructure'', we have studied (1) Methods for detection of stress-induced velocity anisotropy in sands. (2) We have initiated efforts for velocity upscaling to quantify long-wavelength and short-wavelength velocity behavior and the scale-dependent dispersion caused by sediment variability in different depositional environments.

  4. Columbia River Channel Improvement Project Rock Removal Blasting: Monitoring Plan

    SciTech Connect (OSTI)

    Carlson, Thomas J.; Johnson, Gary E.

    2010-01-29T23:59:59.000Z

    This document provides a monitoring plan to evaluate take as outlined in the National Marine Fisheries Service 2002 Biological Opinion for underwater blasting to remove rock from the navigation channel for the Columbia River Channel Improvement Project. The plan was prepared by the Pacific Northwest National Laboratory (PNNL) for the U.S. Army Corps of Engineers (USACE), Portland District.

  5. SEISMIC AND ROCK PHYSICS DIAGNOSTICS OF MULTISCALE RESERVOIR TEXTURES

    SciTech Connect (OSTI)

    Gary Mavko

    2004-08-01T23:59:59.000Z

    As part of our study on ''Relationships between seismic properties and rock microstructure'', we have continued our work on analyzing well logs and microstructural constraints on seismic signatures. We report results of three studies in this report. The first one deals with fractures and faults that provide the primary control on the underground fluid flow through low permeability massive carbonate rocks. Fault cores often represent lower transmissibility whereas the surrounding damaged rocks and main slip surfaces are high transmissibility elements. We determined the physical properties of fault rocks collected in and around the fault cores of large normal faults in central Italy. After studying the P- and S-wave velocity variation during cycles of confining pressure, we conclude that a rigid pore frame characterizes the fault gouge whereas the fractured limestone comprises pores with a larger aspect ratio. The second study was to characterize the seismic properties of brine as its temperature decreases from 25 C to -21 C. The purpose was to understand how the transmitted wave changes with the onset of freezing. The main practical reason for this experiment was to use partially frozen brine as an analogue for a mixture of methane hydrate and water present in the pore space of a gas hydrate reservoir. In the third study we analyzed variations in dynamic moduli in various carbonate reservoirs. The investigations include log and laboratory data from velocity, porosity, permeability, and attenuation measurements.

  6. Multispectral rock-type separation and classification Biliana Paskaleva

    E-Print Network [OSTI]

    Hayat, Majeed M.

    , igneous and sedimentary rocks. The study is performed under ideal conditions for which the data-selection method is also employed based on spectral indices comprising a small subset of all possible ratios, an optimization strategy is performed for the selection of optimal multispectral filters, other than the MTI

  7. Investigation of a hydraulic impact a technology in rock breaking

    E-Print Network [OSTI]

    in mining industry. The impact process of a high speed piston on liquid water, previously introduced on the environment such as fly rocks, air blast, noise pollution and toxic fumes. When blasting occurs close to residential areas, or during tunnel construction, environmental protection regulation could seriously affect

  8. Ion beam analyses of radionuclide migration in heterogeneous rocks

    SciTech Connect (OSTI)

    Alonso, Ursula; Missana, Tiziana; Garcia-Gutierrez, Miguel [CIEMAT, Avda. Complutense 40, Madrid 28040 (Spain); Patelli, Alessandro [CIVEN, Via delle Industrie 5, Venezia-Marghera 30175 (Italy); Rigato, Valentino; Ceccato, Daniele [LNL-INFN, Viale dell' Universita 2, Legnaro-Padova 35020 (Italy)

    2013-07-18T23:59:59.000Z

    The migration of radionuclides (RN) in the environment is a topic of general interest, for its implications on public health, and it is an issue for the long-term safety studies of deep geological repositories (DGR) for high-level radioactive waste. The role played by colloids on RN migration is also of great concern. Diffusion and sorption are fundamental mechanisms controlling RN migration in rocks and many experimental approaches are applied to determine transport parameters for low sorbing RN in homogeneous rocks. However, it is difficult to obtain relevant data for high sorbing RN or colloids, for which diffusion lengths are extremely short, or within heterogeneous rocks, where transport might be different in different minerals. The ion beam techniques Rutherford Backscattering Spectrometry (RBS) and micro-Particle Induced X-Ray Emission ({mu}PIXE), rarely applied in the field, were selected for their micro-analytical potential to study RN diffusion and surface retention within heterogeneous rocks. Main achievements obtained during last 12 years are highlighted.

  9. Onboard Autonomous Rock Shape Analysis For Mars Rovers

    E-Print Network [OSTI]

    in this process, we present an automated technique to allow a rover to classify the shape and other geologic were conducted by characterizing the two-dimensional rock shape while the three-dimensional shape developed and implemented. The per- formance of each measure was characterized by analyzing images from

  10. ConocoPhillips Canada rocks UAlberta science and engineering students

    E-Print Network [OSTI]

    Machel, Hans

    ConocoPhillips Canada rocks UAlberta science and engineering students Teaching, research spaces. As an ongoing supporter of geoscience field schools, ConocoPhillips Canada has provided more than $3.1 million Program at the U of A, the only one of its kind in Canada. "The support from ConocoPhillips Canada

  11. Morphology and dynamics of explosive vents through cohesive rock formations

    E-Print Network [OSTI]

    Galland, Olivier

    to test the effects of these parameters. The experiments were used to test the effect of 2 on vent simulations were used to test the effect of 3 on vent morphology and dynamics. In the numerical models we see to underground explosions that blast the overlaying rock formations [e.g., Gisler, 2009]. This phenomenon occurs

  12. Rock-physics Models for Gas-hydrate Systems Associated

    E-Print Network [OSTI]

    Texas at Austin, University of

    Rock-physics Models for Gas-hydrate Systems Associated with Unconsolidated Marine Sediments Diana at Austin, Austin, Texas, U.S.A. ABSTRACT R ock-physics models are presented describing gas-hydrate systems associated with unconsolidated marine sediments. The goals are to predict gas-hydrate concentration from

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

    SciTech Connect (OSTI)

    Chen, J.; Hoversten, G.M.

    2011-09-15T23:59:59.000Z

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

  14. 2008 Rock Deformation GRC - Conference August 3-8, 2008

    SciTech Connect (OSTI)

    James G. Hirth

    2009-09-21T23:59:59.000Z

    The GRC on Rock Deformation highlights the latest research in brittle and ductile rock mechanics from experimental, field and theoretical perspectives. The conference promotes a multi-disciplinary forum for assessing our understanding of rock strength and related physical properties in the Earth. The theme for the 2008 conference is 'Real-time Rheology'. Using ever-improving geophysical techniques, our ability to constrain the rheological behavior during earthquakes and post-seismic creep has improved significantly. Such data are used to investigate the frictional behavior of faults, processes responsible for strain localization, the viscosity of the lower crust, and viscous coupling between the crust and mantle. Seismological data also provide information on the rheology of the lower crust and mantle through analysis of seismic attenuation and anisotropy. Geologists are improving our understanding of rheology by combining novel analyses of microstructures in naturally deformed rocks with petrologic data. This conference will bring together experts and students in these research areas with experimentalists and theoreticians studying the same processes. We will discuss and assess where agreement exists on rheological constraints derived at different length/time scales using different techniques - and where new insight is required. To encompass the elements of these topics, speakers and discussion leaders with backgrounds in geodesy, experimental rock deformation, structural geology, earthquake seismology, geodynamics, glaciology, materials science, and mineral physics will be invited to the conference. Thematic sessions will be organized on the dynamics of earthquake rupture, the rheology of the lower crust and coupling with the upper mantle, the measurement and interpretation of seismic attenuation and anisotropy, the dynamics of ice sheets and the coupling of reactive porous flow and brittle deformation for understanding geothermal and chemical properties of the shallow crust that are important for developing ideas in CO2 sequestration, geothermal and petrochemical research and the mechanics of shallow faults.

  15. State Waste Discharge Permit Application: Electric resistance tomography testing

    SciTech Connect (OSTI)

    Not Available

    1994-04-01T23:59:59.000Z

    This permit application documentation is for a State Waste Discharge Permit issued in accordance with requirements of Washington Administrative Code 173-216. The activity being permitted is a technology test using electrical resistance tomography. The electrical resistance tomography technology was developed at Lawrence Livermore National Laboratory and has been used at other waste sites to track underground contamination plumes. The electrical resistance tomography technology measures soil electrical resistance between two electrodes. If a fluid contaminated with electrolytes is introduced into the soil, the soil resistance is expected to drop. By using an array of measurement electrodes in several boreholes, the areal extent of contamination can be estimated. At the Hanford Site, the purpose of the testing is to determine if the electrical resistance tomography technology can be used in the vicinity of large underground metal tanks without the metal tank interfering with the test. It is anticipated that the electrical resistance tomography technology will provide a method for accurately detecting leaks from the bottom of underground tanks, such as the Hanford Site single-shell tanks.

  16. Search for underground openings for in situ test facilities in crystalline rock

    SciTech Connect (OSTI)

    Wollenberg, H.A.; Strisower, B.; Corrigan, D.J.; Graf, A.N.; O'Brien, M.T.; Pratt, H.; Board, M.; Hustrulid, W.

    1980-01-01T23:59:59.000Z

    With a few exceptions, crystalline rocks in this study were limited to plutonic rocks and medium to high-grade metamorphic rocks. Nearly 1700 underground mines, possibly occurring in crystalline rock, were initially identified. Application of criteria resulted in the identification of 60 potential sites. Within this number, 26 mines and 4 civil works were identified as having potential in that they fulfilled the criteria. Thirty other mines may have similar potential. Most of the mines identified are near the contact between a pluton and older sedimentary, volcanic and metamorphic rocks. However, some mines and the civil works are well within plutonic or metamorphic rock masses. Civil works, notably underground galleries associated with pumped storage hydroelectric facilities, are generally located in tectonically stable regions, in relatively homogeneous crystalline rock bodies. A program is recommended which would identify one or more sites where a concordance exists between geologic setting, company amenability, accessibility and facilities to conduct in situ tests in crystalline rock.

  17. Fundamental Investigation of Pore Pressure Prediction During Drilling from the Mechanical Behavior of Rock

    E-Print Network [OSTI]

    Rivas Cardona, Juan 1980-

    2011-07-18T23:59:59.000Z

    An investigation was conducted as a preliminary effort to develop a methodology to predict pore pressure in a rock formation during drilling, for all types of rocks and situations. Specifically, it was investigated whether or not the virgin pore...

  18. The effects of acid contact time and rock surfaces on acid fracture conductivity

    E-Print Network [OSTI]

    Melendez Castillo, Maria Georgina

    2009-06-02T23:59:59.000Z

    likely to retain conductivity after closure. The hardness of the rock is the dominating factor to determine the conductivity response when no channeling is present. Among the rocks tested, Texas Cream chalk had the lowest hardness measurement before...

  19. Modeling of thermally driven hydrological processes in partially saturated fractured rock

    E-Print Network [OSTI]

    Tsang, Yvonne

    2010-01-01T23:59:59.000Z

    the heat source and encounters cooler rock, it condenses,fractured rock near the radioactive-decay heat source isrock, giving rise to a reflux of liquid back to the heat source.

  20. Transport and seismoelectric properties of porous permeable rock : numerical modeling and laboratory measurements

    E-Print Network [OSTI]

    Zhan, Xin, Ph. D. Massachusetts Institute of Technology

    2010-01-01T23:59:59.000Z

    The objective of this thesis is to better understand the transport and seismoelectric (SE) properties of porous permeable rock. Accurate information of rock transport properties, together with pore geometry, can aid us to ...

  1. The Effect of Rock Properties on Hydraulic Fracture Conductivity in the Eagle Ford and Fayetteville Shales

    E-Print Network [OSTI]

    Jansen, Timothy A

    2014-09-05T23:59:59.000Z

    . Optimizing fracture designs to improve well performance requires knowledge of how fracture conductivity is affected by rock and proppant characteristics. This study investigates the relationship between rock characteristics and laboratory measurements...

  2. Rock-Water Interactions in the Fenton Hill, New Mexico, Hot Dry...

    Open Energy Info (EERE)

    to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Rock-Water Interactions in the Fenton Hill, New Mexico, Hot Dry Rock Geothermal Systems I. Fluid...

  3. Rock-Water Interactions in the Fenton Hill, New Mexico, Hot Dry...

    Open Energy Info (EERE)

    to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Rock-Water Interactions in the Fenton Hill, New Mexico, Hot Dry Rock Geothermal Systems II....

  4. Abstract--Single-photon emission computed tomography (SPECT) is based on the measurement of radiation emitted by a

    E-Print Network [OSTI]

    Abstract-- Single-photon emission computed tomography (SPECT) is based on the measurement is demonstrated by computer simulation experiments* . I. INTRODUCTION Single-photon emission computed tomography

  5. Finite element analysis and computed tomography based structural rigidity analysis of rat tibia with simulated lytic defects

    E-Print Network [OSTI]

    Vaziri, Ashkan

    Finite element analysis and computed tomography based structural rigidity analysis of rat tibia) (Damron et al., 2003; Mirels, 1989). In contrast, Computed Tomography based Structural Rigidly Ana- lysis

  6. Abstract --Single photon emission computed tomography (SPECT) is based on the measurement of radiation emitted by a

    E-Print Network [OSTI]

    Abstract -- Single photon emission computed tomography (SPECT) is based on the measurement-photon emission computed tomography (SPECT), because of photoelectric absorption and Compton scatter, the gamma

  7. Coupled hydro-mechanical processes in crytalline rock and in induratedand plastic clays: A comparative discussion

    E-Print Network [OSTI]

    Tsang, Chin-Fu; Blumling, Peter; Bernier, Frederic

    2008-01-01T23:59:59.000Z

    at Grimsel. In Coupled Thermo-Hydro- Mechanical-ChemicalCOUPLED HYDRO-MECHANICAL PROCESSES IN CRYTALLINE ROCK AND IN

  8. Multi-Resolution Seismic Tomography Based on Recursive Tessellation Hierarchy

    SciTech Connect (OSTI)

    Simmons, N A; Myers, S C; Ramirez, A

    2009-07-01T23:59:59.000Z

    A 3-D global tomographic model that reconstructs velocity structure at multiple scales and incorporates laterally variable seismic discontinuities is currently being developed. The model parameterization is node-based where nodes are placed along vertices defined by triangular tessellations of a spheroidal surface. The triangular tessellation framework is hierarchical. Starting with a tetrahexahedron representing the whole globe (1st level of the hierarchy, 24 faces), they divide each triangle of the tessellation into daughter triangles. The collection of all daughter triangles comprises the 2nd level of the tessellation hierarchy and further recursion produces an arbitrary number of tessellation levels and arbitrarily fine node-spacing. They have developed an inversion procedure that takes advantage of the recursive properties of the tessellation hierarchies by progressively solving for shorter wavelength heterogeneities. In this procedure, we first perform the tomographic inversion using a tessellation level with coarse node spacing. They find that a coarse node spacing of approximately 8{sup o} is adequate to capture bulk regional properties. They then conduct the tomographic inversion on a 4{sup o} tessellation level using the residuals and inversion results from the 8{sup o} run. In practice they find that the progressive tomography approach is robust, providing an intrinsic regularization for inversion stability and avoids the issue of predefining resolution levels. Further, determining average regional properties with coarser tessellation levels enables long-wavelength heterogeneities to account for sparsely sampled regions (or regions of the mantle where longer wavelength patterns of heterogeneity suffice) while allowing shorter length-scale heterogeneities to emerge where necessary. They demonstrate the inversion approach with a set of synthetic test cases that mimic the complex nature of data arrangements (mixed-determined inversion) common to most tomographic problems. They also apply the progressive inversion approach with Pn waves traveling within the Middle East region and compare the results to simple tomographic inversions. As expected from synthetic testing, the progressive approach results in detailed structure where there is high data density and broader regional anomalies where seismic information is sparse. The ultimate goal is to use these methods to produce a seamless, multi-resolution global tomographic model with local model resolution determined by the constraints afforded by available data. They envisage this new technique as the general approach to be employed for future multi-resolution model development with complex arrangements of regional and teleseismic information.

  9. An Efficient Neumann-Series Based Algorithm for Thermoacoustic and Photoacoustic Tomography with Variable Sound Speed

    E-Print Network [OSTI]

    Stefanov, Plamen

    An Efficient Neumann-Series Based Algorithm for Thermoacoustic and Photoacoustic Tomography present an efficient algorithm for reconstructing an unknown source in Thermoacoustic and Photoacoustic of the Neumann-series based algorithm. 1 Introduction Thermoacoustic (TAT) and Photoacoustic (PAT) Tomography

  10. Microwave-induced thermoacoustic tomography: applications and corrections for the effects of acoustic heterogeneities

    E-Print Network [OSTI]

    Jin, Xing

    2009-05-15T23:59:59.000Z

    This research is primarily focused on developing potential applications for microwaveinduced thermoacoustic tomography and correcting for image degradations caused by acoustic heterogeneities. Microwave-induced thermoacoustic tomography was first...

  11. X-ray Computed Tomography of the Root System of a Live Potted...

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

    X-ray Computed Tomography of the Root System of a Live Potted Plant X-ray Computed Tomography of the Root System of a Live Potted Plant Being able to see the root structure of a...

  12. Stochastic numerical simulations of long term unsaturated flow in waste rock piles

    E-Print Network [OSTI]

    Aubertin, Michel

    Stochastic numerical simulations of long term unsaturated flow in waste rock piles O. Fala Genivar water flow in waste rock piles using selected realizations of stochastically distributed hydraulic term hydrogeological behaviour of waste rock piles, to help select the construction sequence

  13. Determining the modal mineralogy of mafic and ultramafic igneous rocks using thermal emission spectroscopy

    E-Print Network [OSTI]

    Hamilton, Victoria E.

    Determining the modal mineralogy of mafic and ultramafic igneous rocks using thermal emission, Tempe Abstract. The modal mineralogies of 20 mafic and ultramafic igneous rocks were determined from mineralogical information from thermal infrared emission spectra of bulk rock samples. Furthermore, convolution

  14. THE CONVERSION OF BIOMASS TO ETHANOL USING GEOTHERMAL ENERGY DERIVED FROM HOT DRY ROCK

    E-Print Network [OSTI]

    97505 THE CONVERSION OF BIOMASS TO ETHANOL USING GEOTHERMAL ENERGY DERIVED FROM HOT DRY ROCK between a hot dry rock (HDR) geothermal energy source and the power requirements for the conversion -- geothermal energy derived from the vast resource of Hot Dry Rock (HDR) in our country, and biomass

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    E-Print Network [OSTI]

    Nasralla, Ramez

    2013-05-02T23:59:59.000Z

    -salinity water has an impact on the rock wettability; the more reduction in water salinity, the more a water-wet rock surface is produced. In addition, NaCl solutions made the rock more water-wet compared to CaCl2 or MgCl2 at the same concentration. Low...

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    Patzek, Tadeusz W.

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    Paris-Sud XI, Universit de

    1 Organic Geochemistry of the CenomanianTuronian Bahloul Formation Petroleum Source Rock, Central and around diapirs of the Triassic salt. Key words: Organic matter, Petroleum Source Rock, Cenomanian (TOC) determination, Rock-Eval pyrolysis, extractable organic matter content (EOM) fractionation

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    E-Print Network [OSTI]

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    in potential source materials. In the ensuing two centu- ries, investigations into rock varnish have beenThe Rock Varnish Revolution: New Insights from Microlaminations and the Contributions of Tanzhuo Liu Ronald I. Dorn* School of Geographical Sciences, Arizona State University Abstract Rock varnish