Sample records for modis moderate resolution

  1. Global Moderate Resolution Imaging Spectroradiometer (MODIS) cloud detection and height evaluation using CALIOP

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Global Moderate Resolution Imaging Spectroradiometer (MODIS) cloud detection and height evaluation Spectroradiometer (MODIS) cloud detection and height evaluation using CALIOP, J. Geophys. Res., 113, D00A19, doi:10] with plans to continue the cloud record using the next generation of polar orbiting sensors. A ``Climate

  2. Mapping daily snow//ice shortwave broadband albedo from Moderate Resolution Imaging Spectroradiometer (MODIS): The improved

    E-Print Network [OSTI]

    Liang, Shunlin

    and global energy balances when snow coverage is variable. In the polar regions, the high surface albedo acts the Advanced Very High Resolution Radiometer (AVHRR) satellite data in polar regions [De Abreu et al., 1994 variable in surface energy balance calculations. The Moderate Resolution Imaging Spectroradiometer (MODIS

  3. Aerosols in the Caribbean MidAtlantic Region as Observed with the EOS Moderate Resolution Imaging Spectroradiometer (MODIS)

    E-Print Network [OSTI]

    Gilbes, Fernando

    Aerosols in the Caribbean MidAtlantic Region as Observed with the EOS Moderate Resolution Imaging the year, changes in precipitation patterns and greater health risks for the Caribbean region during the spring months. Keywords: MODIS, MODIS Conversion Toolkit, aerosols, Caribbean region INTRODUCTION

  4. Validation of Current Moderate Resolution Imaging Spectroradiometer (MODIS) Daily Snow Albedo Product and Spatial Analysis Based on Multiple Sensors

    E-Print Network [OSTI]

    Zhao, Panshu

    2012-07-16T23:59:59.000Z

    .......................................................................... 47 3.3.4 Measuring Radiance ........................................................................... 47 4. RESULTS ............................................................................................................ 49 4... ....................... 72 1 1. INTRODUCTION 1.1 Importance of Snow Albedo and MODIS Albedo Research Albedo is the ratio of the reflected solar radiance from a unit surface area into the entire viewing hemisphere to the incident solar radiance, when the surface...

  5. advanced moderately differentiated: Topics by E-print Network

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

    Resolution Imaging Spectrometer (MODIS) to calibrate advanced very high resolution radiometer Geosciences Websites Summary: Using Moderate Resolution Imaging Spectrometer (MODIS)...

  6. advanced high resolution: Topics by E-print Network

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

    Resolution Imaging Spectrometer (MODIS) to calibrate advanced very high resolution radiometer Geosciences Websites Summary: Using Moderate Resolution Imaging Spectrometer (MODIS)...

  7. Evaluation of Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and Moderate Resolution Imaging Spectrometer

    E-Print Network [OSTI]

    Evaluation of Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and Moderate Resolution the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) and the Moderate Resolution Imaging Spectrometer (MODIS). Key goals were to assess the nature of these relationships as they varied between sensors

  8. arecibo high resolution: Topics by E-print Network

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

    84 Using Moderate Resolution Imaging Spectrometer (MODIS) to calibrate advanced very high resolution radiometer Geosciences Websites Summary: Using Moderate Resolution Imaging...

  9. 17FEBRUARY 2004AMERICAN METEOROLOGICAL SOCIETY | he International MODIS (Moderate Resolution

    E-Print Network [OSTI]

    Li, Jun

    , ELISABETH WEISZ, THOMAS RINK, KEVIN BAGGETT, JIM DAVIES, WILLIAM L. SMITH, AND JAMES C. DODGE SYSTEMS detection, fisheries management, weather forecasting, aviation safety, and ice forecasts. To date- AFFILIATIONS: HUANG, GUMLEY, STRABALA, LI, WEISZ, RINK, BAGGETT, AND DAVIES--Cooperative Institute

  10. High Cloud Properties from Three Years of MODIS Terra and Aqua Collection-4 Data over the Tropics

    E-Print Network [OSTI]

    Baum, Bryan A.

    High Cloud Properties from Three Years of MODIS Terra and Aqua Collection-4 Data over the Tropics) ABSTRACT This study surveys the optical and microphysical properties of high (ice) clouds over the Tropics on the gridded level-3 cloud products derived from the measurements acquired by the Moderate Resolution Imaging

  11. Improving macromolecular atomic models at moderate resolution by automated iterative model building, statistical density modification and refinement

    SciTech Connect (OSTI)

    Terwilliger, Thomas C., E-mail: terwilliger@lanl.gov [Mail Stop M888, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

    2003-07-01T23:59:59.000Z

    A procedure for iterative model-building, statistical density modification and refinement at moderate resolution (up to about 2.8 Ĺ) is described. An iterative process for improving the completeness and quality of atomic models automatically built at moderate resolution (up to about 2.8 Ĺ) is described. The process consists of cycles of model building interspersed with cycles of refinement and combining phase information from the model with experimental phase information (if any) using statistical density modification. The process can lead to substantial improvements in both the accuracy and completeness of the model compared with a single cycle of model building. For eight test cases solved by MAD or SAD at resolutions ranging from 2.0 to 2.8 Ĺ, the fraction of models built and assigned to sequence was 46–91% (mean of 65%) after the first cycle of building and refinement, and 78-95% (mean of 87%) after 20 cycles. In an additional test case, an incorrect model of gene 5 protein (PDB code 2gn5; r.m.s.d. of main-chain atoms from the more recent refined structure 1vqb at 1.56 Ĺ) was rebuilt using only structure-factor amplitude information at varying resolutions from 2.0 to 3.0 Ĺ. Rebuilding was effective at resolutions up to about 2.5 Ĺ. The resulting models had 60-80% of the residues built and an r.m.s.d. of main-chain atoms from the refined structure of 0.20 to 0.62 Ĺ. The algorithm is useful for building preliminary models of macromolecules suitable for an experienced crystallographer to extend, correct and fully refine.

  12. Surface Albedo/BRDF Parameters (Terra/Aqua MODIS)

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

    Trishchenko, Alexander

    Spatially and temporally complete surface spectral albedo/BRDF products over the ARM SGP area were generated using data from two Moderate Resolution Imaging Spectroradiometer (MODIS) sensors on Terra and Aqua satellites. A landcover-based fitting (LBF) algorithm is developed to derive the BRDF model parameters and albedo product (Luo et al., 2004a). The approach employs a landcover map and multi-day clearsky composites of directional surface reflectance. The landcover map is derived from the Landsat TM 30-meter data set (Trishchenko et al., 2004a), and the surface reflectances are from MODIS 500m-resolution 8-day composite products (MOD09/MYD09). The MOD09/MYD09 data are re-arranged into 10-day intervals for compatibility with other satellite products, such as those from the NOVA/AVHRR and SPOT/VGT sensors. The LBF method increases the success rate of the BRDF fitting process and enables more accurate monitoring of surface temporal changes during periods of rapid spring vegetation green-up and autumn leaf-fall, as well as changes due to agricultural practices and snowcover variations (Luo et al., 2004b, Trishchenko et al., 2004b). Albedo/BRDF products for MODIS on Terra and MODIS on Aqua, as well as for Terra/Aqua combined dataset, are generated at 500m spatial resolution and every 10-day since March 2000 (Terra) and July 2002 (Aqua and combined), respectively. The purpose for the latter product is to obtain a more comprehensive dataset that takes advantages of multi-sensor observations (Trishchenko et al., 2002). To fill data gaps due to cloud presence, various interpolation procedures are applied based on a multi-year observation database and referring to results from other locations with similar landcover property. Special seasonal smoothing procedure is also applied to further remove outliers and artifacts in data series.

  13. A global forest canopy height map from the Moderate Resolution Imaging Spectroradiometer and the Geoscience

    E-Print Network [OSTI]

    Lefsky, Michael

    - radiometer and the Geoscience Laser Altimeter System, Geophys. Res. Lett., 37, L15401, doi:10.1029/2010GL, is sensitive throughout the range of biomass [Lefsky et al., 2005a, 2005b]. Each lidar waveform is a high spatial resolution record of the energy returned when a shortduration pulse of light is returned from

  14. Retrieval of Cloud Phase Using the Moderate Resolution Imaging Spectroradiometer Data during the Mixed-Phase Arctic Cloud Experiment

    SciTech Connect (OSTI)

    Spangenberg, D.; Minnis, P.; Shupe, M.; Uttal, T.; Poellot, M.

    2005-03-18T23:59:59.000Z

    Improving climate model predictions over Earth's polar regions requires a comprehensive knowledge of polar cloud microphysics. Over the Arctic, there is minimal contrast between the clouds and background snow surface, making it difficult to detect clouds and retrieve their phase from space. Snow and ice cover, temperature inversions, and the predominance of mixed-phase clouds make it even more difficult to determine cloud phase. Also, since determining cloud phase is the first step toward analyzing cloud optical depth, particle size, and water content, it is vital that the phase be correct in order to obtain accurate microphysical and bulk properties. Changes in these cloud properties will, in turn, affect the Arctic climate since clouds are expected to play a critical role in the sea ice albedo feedback. In this paper, the IR trispectral technique (IRTST) is used as a starting point for a WV and 11-{micro}m brightness temperature (T11) parameterization (WVT11P) of cloud phase using MODIS data. In addition to its ability to detect mixed-phase clouds, the WVT11P also has the capability to identify thin cirrus clouds overlying mixed or liquid phase clouds (multiphase ice). Results from the Atmospheric Radiation Measurement (ARM) MODIS phase model (AMPHM) are compared to the surface-based cloud phase retrievals over the ARM North Slope of Alaska (NSA) Barrow site and to in-situ data taken from University of North Dakota Citation (CIT) aircraft which flew during the Mixed-Phase Arctic Cloud Experiment (MPACE). It will be shown that the IRTST and WVT11P combined to form the AMPHM can achieve a relative high accuracy of phase discrimination compared to the surface-based retrievals. Since it only uses MODIS WV and IR channels, the AMPHM is robust in the sense that it can be applied to daytime, twilight, and nighttime scenes with no discontinuities in the output phase.

  15. Estimation of suspended sedimentsEstimation of suspended sediments i MODIS 250 b di MODIS 250 b d iiusing MODIS 250 m bandsusing MODIS 250 m bands inin

    E-Print Network [OSTI]

    Gilbes, Fernando

    iiusing MODIS 250 m bandsusing MODIS 250 m bands inin Mayagüez Bay Puerto RicoMayagüez Bay Puerto Rico

  16. Transitions of cloud-topped marine boundary layers characterized by AIRS, MODIS, and a large eddy simulation model

    SciTech Connect (OSTI)

    Yue, Qing; Kahn, Brian; Xiao, Heng; Schreier, Mathias; Fetzer, E. J.; Teixeira, J.; Suselj, Kay

    2013-08-16T23:59:59.000Z

    Cloud top entrainment instability (CTEI) is a hypothesized positive feedback between entrainment mixing and evaporative cooling near the cloud top. Previous theoretical and numerical modeling studies have shown that the persistence or breakup of marine boundary layer (MBL) clouds may be sensitive to the CTEI parameter. Collocated thermodynamic profile and cloud observations obtained from the Atmospheric Infrared Sounder (AIRS) and Moderate Resolution Imaging Spectroradiometer (MODIS) instruments are used to quantify the relationship between the CTEI parameter and the cloud-topped MBL transition from stratocumulus to trade cumulus in the northeastern Pacific Ocean. Results derived from AIRS and MODIS are compared with numerical results from the UCLA large eddy simulation (LES) model for both well-mixed and decoupled MBLs. The satellite and model results both demonstrate a clear correlation between the CTEI parameter and MBL cloud fraction. Despite fundamental differences between LES steady state results and the instantaneous snapshot type of observations from satellites, significant correlations for both the instantaneous pixel-scale observations and the long-term averaged spatial patterns between the CTEI parameter and MBL cloud fraction are found from the satellite observations and are consistent with LES results. This suggests the potential of using AIRS and MODIS to quantify global and temporal characteristics of the cloud-topped MBL transition.

  17. Estimation of Net Ecosystem Carbon Exchange for the Conterminous UnitedStates by Combining MODIS and AmeriFlux Data

    SciTech Connect (OSTI)

    Xiao, Jingfeng; Zhuang, Qianlai; Baldocchi, Dennis D.; Law, Beverly E.; Richardson, Andrew D.; Chen, Jiquan; Oren, Ram; Starr, Gregory; Noormets, Asko; Ma, Siyan; Verma, Shashi B.; Wharton, Sonia; Wofsy, Steven C.; Bolstad, Paul V.; Burns, Sean P.; Cook, David R.; Curtis, Peter S.; Drake, Bert G.; Falk, Matthias; Fischer, Marc L.; Foster, David R.; Gu, Lianhong; Hadley, Julian L.; Hollinger, David Y.; Katul, Gabriel G.; Litvak, Marcy; Martin, Timothy A.; Matamala, Roser; McNulty, Steve; Meyers, Tilden P.; Monson, Russell K.; Munger, J. William; Oechel, Walter C.; U, Kyaw Tha Paw; Schmid, Hans Peter; Scott, Russell L.; Sun, Ge; Suyker, Andrew E.; Torn, Margaret S.

    2009-03-06T23:59:59.000Z

    Eddy covariance flux towers provide continuous measurements of net ecosystem carbon exchange (NEE) for a wide range of climate and biome types. However, these measurements only represent the carbon fluxes at the scale of the tower footprint. To quantify the net exchange of carbon dioxide between the terrestrial biosphere and the atmosphere for regions or continents, flux tower measurements need to be extrapolated to these large areas. Here we used remotely-sensed data from the Moderate Resolution Imaging Spectrometer (MODIS) instrument on board NASA's Terra satellite to scale up AmeriFlux NEE measurements to the continental scale. We first combined MODIS and AmeriFlux data for representative U.S. ecosystems to develop a predictive NEE model using a regression tree approach. The predictive model was trained and validated using NEE data over the periods 2000-2004 and 2005-2006, respectively. We found that the model predicted NEE reasonably well at the site level. We then applied the model to the continental scale and estimated NEE for each 1 km x 1 km cell across the conterminous U.S. for each 8-day period in 2005 using spatially-explicit MODIS data. The model generally captured the expected spatial and seasonal patterns of NEE. Our study demonstrated that our empirical approach is effective for scaling up eddy flux NEE measurements to the continental scale and producing wall-to-wall NEE estimates across multiple biomes. Our estimates may provide an independent dataset from simulations with biogeochemical models and inverse modeling approaches for examining the spatiotemporal patterns of NEE and constraining terrestrial carbon budgets for large areas.

  18. Estimation of net ecosystem carbon exchange for the conterminous United States by combining MODIS and AmeriFlux data

    SciTech Connect (OSTI)

    Xiao, Jingfeng; Zhuang, Qianlai; Baldocchi, Dennis D.; Bolstad, Paul V.; Burns, Sean P.; Chen, Jiquan; Cook, David R.; Curtis, Peter S.; Drake, Bert G.; Foster, David R.; Gu, Lianhong; Hadley, Julian L.; Hollinger, David Y.; Katul, Gabriel G.; Law, Beverly E.; Litvak, Marcy; Ma, Siyan; Martin, Timothy A.; Matamala, Roser; McNulty, Steve; Meyers, Tilden P.; Monson, Russell K.; Munger, J. William; Noormets, Asko; Oechel, Walter C.; Oren, Ram; Richardson, Andrew D.; Schmid, Hans Peter; Scott, Russell L.; Starr, Gregory; Sun, Ge; Suyker, Andrew E.; Torn, Margaret S.; Paw, Kyaw; Verma, Shashi B.; Wharton, Sonia; Wofsy, Steven C.

    2008-10-01T23:59:59.000Z

    Eddy covariance flux towers provide continuous measurements of net ecosystem carbon exchange (NEE) for a wide range of climate and biome types. However, these measurements only represent the carbon fluxes at the scale of the tower footprint. To quantify the net exchange of carbon dioxide between the terrestrial biosphere and the atmosphere for regions or continents, flux tower measurements need to be extrapolated to these large areas. Here we used remotely sensed data from the Moderate Resolution Imaging Spectrometer (MODIS) instrument on board the National Aeronautics and Space Administration's (NASA) Terra satellite to scale up AmeriFlux NEE measurements to the continental scale. We first combined MODIS and AmeriFlux data for representative U.S. ecosystems to develop a predictive NEE model using a modified regression tree approach. The predictive model was trained and validated using eddy flux NEE data over the periods 2000-2004 and 2005-2006, respectively. We found that the model predicted NEE well (r = 0.73, p < 0.001). We then applied the model to the continental scale and estimated NEE for each 1 km x 1 km cell across the conterminous U.S. for each 8-day interval in 2005 using spatially explicit MODIS data. The model generally captured the expected spatial and seasonal patterns of NEE as determined from measurements and the literature. Our study demonstrated that our empirical approach is effective for scaling up eddy flux NEE measurements to the continental scale and producing wall-to-wall NEE estimates across multiple biomes. Our estimates may provide an independent dataset from simulations with biogeochemical models and inverse modeling approaches for examining the spatiotemporal patterns of NEE and constraining terrestrial carbon budgets over large areas.

  19. Land cover time profiles from linear mixture models applied to MODIS images P. Oliveira a,

    E-Print Network [OSTI]

    Gonçalves, Paulo

    the coarse spatial resolution of satellites such as the Advanced Very High Resolution Radiometer (AVHRR) (e and AQUA launched on December 18, 1999 and on May 4, 2002, respectively. MODIS images correspond to high the pixel. In linear models (LMM) the electromagnetic energy interacts with a single component before being

  20. Strong Links Between Teleconnections and Ecosystem Exchange Found at a Pacific Northwest Old-Growth Forest from Flux Tower and MODIS EVI Data

    SciTech Connect (OSTI)

    Wharton, S; Chasmer, L; Falk, M; Paw U, K T

    2009-03-12T23:59:59.000Z

    Variability in three Pacific teleconnection patterns are examined to see if net carbon exchange at a low-elevation, old-growth forest is affected by climatic changes associated with these periodicities. Examined are the Pacific Decadal Oscillation (PDO), Pacific/North American Oscillation (PNA) and El Nino-Southern Oscillation (ENSO). We use nine years of eddy covariance CO{sub 2}, H{sub 2}O and energy fluxes measured at the Wind River AmeriFlux site, Washington, USA and eight years of tower-pixel remote sensing data from the Moderate Resolution Imaging Spectroradiometer (MODIS) to address this question. We compute a new Composite Climate Index (CCI) based on the three Pacific Oscillations to divide the measurement period into positive- (2003 and 2005), negative- (1999 and 2000) and neutral-phase climate years (2001, 2002, 2004, 2006 and 2007). The forest transitioned from an annual net carbon sink (NEP = + 217 g C m{sup -2} year{sup -1}, 1999) to a source (NEP = - 100 g C m{sup -2} year{sup -1}, 2003) during two dominant teleconnection patterns. Net ecosystem productivity (NEP), water use efficiency (WUE) and light use efficiency (LUE) were significantly different (P < 0.01) during positive (NEP = -0.27 g C m{sup -2} day{sup -1}, WUE = 4.1 mg C/g H{sub 2}O, LUE = 0.94 g C MJ{sup -1}) and negative (NEP = +0.37 g C m{sup -2} day{sup -1}, WUE = 3.4 mg C/g H{sub 2}O, LUE = 0.83 g C MJ{sup -1}) climate phases. The CCI was linked to variability in the MODIS Enhanced Vegetation Index (EVI) but not to MODIS Fraction of absorbed Photosynthetically Active Radiation (FPAR). EVI was highest during negative climate phases (1999 and 2000) and was positively correlated with NEP and showed potential for using MODIS to estimate teleconnection-driven anomalies in ecosystem CO{sub 2} exchange in old-growth forests. This work suggests that any increase in the strength or frequency of ENSO coinciding with in-phase, low frequency Pacific oscillations (PDO and PNA) will likely increase CO{sub 2} uptake variability in Pacific Northwest conifer forests.

  1. Estimating crop net primary production using inventory data and MODIS-derived parameters

    SciTech Connect (OSTI)

    Bandaru, Varaprasad; West, Tristram O.; Ricciuto, Daniel M.; Izaurralde, Roberto C.

    2013-06-03T23:59:59.000Z

    National estimates of spatially-resolved cropland net primary production (NPP) are needed for diagnostic and prognostic modeling of carbon sources, sinks, and net carbon flux. Cropland NPP estimates that correspond with existing cropland cover maps are needed to drive biogeochemical models at the local scale and over national and continental extents. Existing satellite-based NPP products tend to underestimate NPP on croplands. A new Agricultural Inventory-based Light Use Efficiency (AgI-LUE) framework was developed to estimate individual crop biophysical parameters for use in estimating crop-specific NPP. The method is documented here and evaluated for corn and soybean crops in Iowa and Illinois in years 2006 and 2007. The method includes a crop-specific enhanced vegetation index (EVI) from the Moderate Resolution Imaging Spectroradiometer (MODIS), shortwave radiation data estimated using Mountain Climate Simulator (MTCLIM) algorithm and crop-specific LUE per county. The combined aforementioned variables were used to generate spatially-resolved, crop-specific NPP that correspond to the Cropland Data Layer (CDL) land cover product. The modeling framework represented well the gradient of NPP across Iowa and Illinois, and also well represented the difference in NPP between years 2006 and 2007. Average corn and soybean NPP from AgI-LUE was 980 g C m-2 yr-1 and 420 g C m-2 yr-1, respectively. This was 2.4 and 1.1 times higher, respectively, for corn and soybean compared to the MOD17A3 NPP product. Estimated gross primary productivity (GPP) derived from AgI-LUE were in close agreement with eddy flux tower estimates. The combination of new inputs and improved datasets enabled the development of spatially explicit and reliable NPP estimates for individual crops over large regional extents.

  2. Mapping incident photosynthetically active radiation from MODIS data over China

    E-Print Network [OSTI]

    Liang, Shunlin

    of incident photosynthetically active radiation from Moderate Resolution Imaging Spectrometer data. Journal, nitrogen and energy in different natural systems. Since photosynthesis is the core process for energy as an input for modeling photosynthesis from single plant leaves to complex plant communities. For example

  3. A Continuous Measure of Gross Primary Production for the Conterminous U.S. Derived from MODIS and AmeriFlux Data

    SciTech Connect (OSTI)

    Xia, Jingfeng; Zhuang, Qianlai; Law, Beverly E.; Chen, Jiquan; Baldocchi, Dennis D.; Cook, David R.; Oren, Ram; Richardson, Andrew D.; Wharton, Sonia; Ma, Siyan; Martin, Timothy A.; Verma, Shashi B.; Suyker, Andrew E.; Scott, Russell L.; Monson, Russell K.; Litvak, Marcy; Hollinger, David Y.; Sun, Ge; Davis, Kenneth J.; Bolstad, Paul V.; Burns, Sean P.; Curtis, Peter S.; Drake, Bert G.; Falk, Matthias; Fischer, Marc L.; Foster, David R.; Gu, Lianhong; Hadley, Julian L.; Katul, Gabriel G.; Matamala, Roser; McNulty, Steve; Meyers, Tilden P.; Munger, J. William; Noormets, Asko; Oechel, Walter C.; U, Kyaw Tha Paw; Schmid, Hans Peter; Starr, Gregory; Torn, Margaret S.; Wofsy, Steven C.

    2009-01-28T23:59:59.000Z

    The quantification of carbon fluxes between the terrestrial biosphere and the atmosphere is of scientific importance and also relevant to climate-policy making. Eddy covariance flux towers provide continuous measurements of ecosystem-level exchange of carbon dioxide spanning diurnal, synoptic, seasonal, and interannual time scales. However, these measurements only represent the fluxes at the scale of the tower footprint. Here we used remotely-sensed data from the Moderate Resolution Imaging Spectroradiometer (MODIS) to upscale gross primary productivity (GPP) data from eddy covariance flux towers to the continental scale. We first combined GPP and MODIS data for 42 AmeriFlux towers encompassing a wide range of ecosystem and climate types to develop a predictive GPP model using a regression tree approach. The predictive model was trained using observed GPP over the period 2000-2004, and was validated using observed GPP over the period 2005-2006 and leave-one-out cross-validation. Our model predicted GPP fairly well at the site level. We then used the model to estimate GPP for each 1 km x 1 km cell across the U.S. for each 8-day interval over the period from February 2000 to December 2006 using MODIS data. Our GPP estimates provide a spatially and temporally continuous measure of gross primary production for the U.S. that is a highly constrained by eddy covariance flux data. Our study demonstrated that our empirical approach is effective for upscaling eddy flux GPP data to the continental scale and producing continuous GPP estimates across multiple biomes. With these estimates, we then examined the patterns, magnitude, and interannual variability of GPP. We estimated a gross carbon uptake between 6.91 and 7.33 Pg C yr{sup -1} for the conterminous U.S. Drought, fires, and hurricanes reduced annual GPP at regional scales and could have a significant impact on the U.S. net ecosystem carbon exchange. The sources of the interannual variability of U.S. GPP were dominated by these extreme climate events and disturbances.

  4. The Isis cold moderators

    SciTech Connect (OSTI)

    Allen, G. M.; Broome, T. A.; Burridge, R. A.; Cragg, D.; Hall, R.; Haynes, D.; Hirst, J.; Hogston, J. R.; Jones, H. H.; Sexton, J.; Wright, P.

    1997-09-01T23:59:59.000Z

    ISIS is a pulsed spallation neutron source where neutrons are produced by the interaction of a 160 kW proton beam of energy 800 MeV in a water-cooled Tantalum Target. The fast neutrons produced are thermalized in four moderators: two ambient water, one liquid methane operating at 100K and a liquid hydrogen moderator at 20 K. This paper gives a description of the construction of both cold moderator systems, details of the operating experience and a description of the current development program.

  5. america modis landcover: Topics by E-print Network

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

    65 Constraining MODIS snow albedo at large solar zenith angles: Implications for surface energy budget in Greenland Geosciences Websites Summary: latitudes is crucial for climate...

  6. Cloud Detection with MODIS, Part I: Improvements in the MODIS Cloud Mask for Collection 5 *Richard A. Frey, Steven A. Ackerman, Yinghui Liu, Kathleen I. Strabala, Hong Zhang,

    E-Print Network [OSTI]

    Sheridan, Jennifer

    Cloud Detection with MODIS, Part I: Improvements in the MODIS Cloud Mask for Collection 5 *Richard.frey@ssec.wisc.edu August 2007 #12;ABSTRACT Significant improvements have been made to the MODIS cloud mask (MOD35 and MYD35 to the 3.9-12 m and 11-12 m cloud tests. More non-MODIS ancillary input data has been added. Land and sea

  7. aqua modis reflectance: Topics by E-print Network

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

    Standards Process Breakout Session June 15, 2005 Robert Wolfe NASA GSFC Code 614.5 & Raytheon ITSS 12;June 15, 2005 - Wolfe - San Diego 2 MODIS Land Surface Reflectance products:...

  8. Stennis Space Center Use of MODIS Forest Monitoring Products in

    E-Print Network [OSTI]

    Hargrove, William W.

    of MODIS Forest Monitoring Products in Developing a Forest Threat Early Warning System Stennis Space Center Prototypical Early Warning System (EWS) results ­ Posting of NRT results on-line for use by USFS Forest Monitoring Products in Developing a Forest Threat Early Warning System Stennis Space Center

  9. Moderated ruthenium fischer-tropsch synthesis catalyst

    DOE Patents [OSTI]

    Abrevaya, Hayim (Wilmette, IL)

    1991-01-01T23:59:59.000Z

    The subject Fischer-Tropsch catalyst comprises moderated ruthenium on an inorganic oxide support. The preferred moderator is silicon. Preferably the moderator is effectively positioned in relationship to ruthenium particles through simultaneous placement on the support using reverse micelle impregnation.

  10. Cryogenic moderator simulations : confronting reality.

    SciTech Connect (OSTI)

    Iverson, E. B.

    1999-01-06T23:59:59.000Z

    The Intense Pulsed Neutron Source (IPNS) at Argonne National Laboratory is a spallation neutron source dedicated to materials research. Its three cryogenic methane moderators provide twelve neutron beams to fourteen instruments and test facilities. This report concerns ongoing activities for benchmarking our Monte Carlo model of the IPNS neutron generation system. This paper concentrates on the techniques (both experimental and calculational) used in such benchmarking activities.

  11. The Modi ed Sudden Death Test: Planning Life Tests with a Limited Number of Test Positions

    E-Print Network [OSTI]

    The Modi ed Sudden Death Test: Planning Life Tests with a Limited Number of Test Positions Francis for Nondestructive Evaluation Iowa State University Ames, IA 50011 ABSTRACT: We present modi ed sudden death test (MSDT) plans to address the problem of limited testing positions in life tests. A single MSDT involves

  12. Low to moderate temperature nanolaminate heater

    DOE Patents [OSTI]

    Eckels, J. Del (Livermore, CA); Nunes, Peter J. (Danville, CA); Simpson, Randall L. (Livermore, CA); Hau-Riege, Stefan (Fremont, CA); Walton, Chris (Oakland, CA); Carter, J. Chance (Livermore, CA); Reynolds, John G. (San Ramon, CA)

    2011-01-11T23:59:59.000Z

    A low to moderate temperature heat source comprising a high temperature energy source modified to output low to moderate temperatures wherein the high temperature energy source modified to output low to moderate temperatures is positioned between two thin pieces to form a close contact sheath. In one embodiment the high temperature energy source modified to output low to moderate temperatures is a nanolaminate multilayer foil of reactive materials that produces a heating level of less than 200.degree. C.

  13. Analysis of MODIS 250 m NDVI Using Different Time-Series Data for Crop Type Separability

    E-Print Network [OSTI]

    Lee, Eunmok

    2014-08-31T23:59:59.000Z

    The primary objectives of this research were to: (1) investigate the use of different compositing periods of NDVI values of time-series MODIS 250 m data for distinguishing major crop types on the central Great Plains of ...

  14. MODIS-Aided Statewide Net Groundwater-Recharge Estimation in Nebraska

    E-Print Network [OSTI]

    Szilagyi, Jozsef

    MODIS-Aided Statewide Net Groundwater-Recharge Estimation in Nebraska by Jozsef Szilagyi1 measurements of Billesbach and Arkebauer (2012) at the Gudmundsen Ranch (G). Nebraska (Szilagyi et al. 2003

  15. DEVELOPING A METHOD TO MONITOR SEDIMENTATION PROCESSES IN MAYAGEZ BAY USING MODIS DATA

    E-Print Network [OSTI]

    Gilbes, Fernando

    b d 1 & 2) October 26, 2005 Close up of the Bay (c) (MODIS band 1 & 2) y = 452.41x + 2.9603 R 2 = 0.7232

  16. MODIS snow albedo bias at high solar zenith angles relative to theory and to in situ observations in Greenland

    E-Print Network [OSTI]

    Wang, Xianwei; Zender, Charles S

    2010-01-01T23:59:59.000Z

    glacial lakes across the Greenland Ice Sheet. Remote Sensing2000. Online article: Greenland climate network (GC- Net)characteristics on the Greenland Ice Sheet using MODIS and

  17. Quantification of Impurities in Prairie Snowpacks and Evaluation and Assessment of Measuring Snow Parameters from MODIS Images

    E-Print Network [OSTI]

    Morris, Jennifer Nicole

    2012-10-19T23:59:59.000Z

    of the sample sites that included: temperature, density, depth, and grain size. At some locations snow reflectance and snow radiance was collected with an Analytical Spectral Device visible/near infra-red spectroradiometer (350 – 1500 nm). Snow impurity... of an ADEOS-II snow product algorithm that compares simulated radiances to measured sensor radiances for retrieval of snow grain size and mass fraction of soot in snow was attempted using satellite images acquired by the Moderate Resolution Imaging...

  18. Evaluation of the MODIS (MOD10A1) daily snow albedo product over the Greenland ice sheet

    E-Print Network [OSTI]

    Box, Jason E.

    Evaluation of the MODIS (MOD10A1) daily snow albedo product over the Greenland ice sheet Julienne C Abstract This study evaluates the performance of the beta-test MODIS (MOD10A1) daily albedo product using with the launch of the first Landsat. Since then, a wide range of optical-wavelength sensors have been launched

  19. MODIS-Derived Boundary Conditions for a Mesoscale Climate Model: Application to Irrigated Agriculture in the Euphrates Basin

    E-Print Network [OSTI]

    Evans, Jason

    -level water consumption were more than doubled relative to simulations that did not incorporate MODIS data to improve the realism of a regional climate model (the fifth-generation Pennsylvania State University­NCAR Mesoscale Model) with respect to irrigated agriculture. MODIS data were used to estimate spatially

  20. Better Buildings Program San Jose - Serving Moderate Income Residents...

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

    Program San Jose - Serving Moderate Income Residents Better Buildings Program San Jose - Serving Moderate Income Residents Provides an overview of the program components and goals,...

  1. Gas Dynamic Effects On Laser Cut Quality Kai Chen, Y. Lawrence Yao, and Vijay Modi

    E-Print Network [OSTI]

    Yao, Y. Lawrence

    Gas Dynamic Effects On Laser Cut Quality Kai Chen, Y. Lawrence Yao, and Vijay Modi Department are very sensitive to gas jet pressure and nozzle standoff distance. Do a high gas pressure and a small shows the same behavior (i.e., discontinuity as gas pressure and standoff change

  2. Closing the carbon budget of estuarine wetlands with tower-based measurements and MODIS time series

    E-Print Network [OSTI]

    Chen, Jiquan

    Closing the carbon budget of estuarine wetlands with tower-based measurements and MODIS time series, Institute of Biodiversity Science, Fudan University, Shanghai 200433, China, wDepartment of Environmental have distinct carbon flux dynamics ­ the lateral carbon flux incurred by tidal activities, and methane

  3. Case Study 1 Detection of Oil Slicks using MODIS and SAR

    E-Print Network [OSTI]

    Meyers, Steven D.

    ecosystems. Every year, huge quantities of oil and petroleum products enter the sea, land, and groundwaterCase Study 1 Detection of Oil Slicks using MODIS and SAR Imagery Chuanmin Hu1 , Xiaofeng Li2 , William G. Pichel3 1.1 Background Oil pollution can cause extensive damage to marine and terrestrial

  4. HEAT ISLAND OF SAN ANTONIO, TEXAS DETECTED BY MODIS/AQUA TEMPERATURE PRODUCT

    E-Print Network [OSTI]

    Texas at San Antonio, University of

    by Chudnovsky et al. (2004) suggests that the best remote sensing for urban heat environment study shouldHEAT ISLAND OF SAN ANTONIO, TEXAS DETECTED BY MODIS/AQUA TEMPERATURE PRODUCT Hongjie Xie, Huade Guan, and Sandra Ytuarte Laboratory for Remote Sensing and Geoinformatics Department of Earth

  5. Constraining MODIS snow albedo at large solar zenith angles: Implications for surface energy budget in Greenland

    E-Print Network [OSTI]

    Zender, Charles

    Constraining MODIS snow albedo at large solar zenith angles: Implications for surface energy budget; Solar Zenith Angle; Greenland; Surface Energy Budget 2 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 plays a pivotal role in determining the surface energy balance of Greenland which, by virtue of its area

  6. Step-modied phase diagram of chemisorbed oxygen on nickel T.P. Pearl 1

    E-Print Network [OSTI]

    Sibener, Steven

    Step-modi®ed phase diagram of chemisorbed oxygen on nickel T.P. Pearl 1 , S.B. Darling, S of chemisorbed oxygen overlayers on a vicinal nickel surface using low energy electron diraction (LEED), Auger by the presence of regular steps. Ó 2001 Elsevier Science B.V. All rights reserved. Keywords: Oxygen; Nickel

  7. UNCORRECTEDPROOF 1 Towards deterministic downscaling of SMOS soil moisture using MODIS derived soil

    E-Print Network [OSTI]

    Boyer, Edmond

    of environmental applications including meteor- 33 ology, hydrology, water resource management and climatology. 34UNCORRECTEDPROOF 1 Towards deterministic downscaling of SMOS soil moisture using MODIS derived soil Kerr b 4 a Civil and Environmental Engineering, The University of Melbourne, Australia 5 b Centre d

  8. Dark Matter Search with Moderately Superheated Liquids

    E-Print Network [OSTI]

    L. A. Hamel; L. Lessard; V. Zacek; Bhaskar Sur

    1996-02-14T23:59:59.000Z

    We suggest the use of moderately superheated liquids in the form of superheated droplet detectors for a new type of neutralino search experiment. The advantage of this method for Dark Matter detection is, that the detector material is cheap, readily available and that it is easily possible to fabricate a large mass detector. Moreover the detector can be made "background blind", i.e. exclusively sensitive to nuclear recoils.

  9. Mutant HNF-1{alpha} and mutant HNF-1{beta} identified in MODY3 and MODY5 downregulate DPP-IV gene expression in Caco-2 cells

    SciTech Connect (OSTI)

    Gu Ning [Laboratory of Metabolism, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto (Japan); Laboratory of Neurochemistry, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto (Japan); Adachi, Tetsuya [Department of Genomic Drug Discovery Science, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto (Japan); Matsunaga, Tetsuro [Laboratory of Metabolism, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto (Japan); Takeda, Jun [Department of Endocrinology Diabetes and Rheumatology, Graduate School of Medicine, Gifu University School of Medicine, Gifu (Japan); Tsujimoto, Gozoh [Department of Genomic Drug Discovery Science, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto (Japan); Ishihara, Akihiko [Laboratory of Neurochemistry, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto (Japan); Yasuda, Koichiro [Laboratory of Metabolism, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto (Japan); Diabetic Center, Tsunashimakai-Kosei Hospital, Himeji (Japan); Tsuda, Kinsuke [Laboratory of Metabolism, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto (Japan)]. E-mail: jinkan@tom.life.h.kyoto-u.ac.jp

    2006-08-04T23:59:59.000Z

    Dipeptidylpeptidase IV (DPP-IV) is a well-documented drug target for the treatment of type 2 diabetes. Hepatocyte nuclear factors (HNF)-1{alpha} and HNF-1{beta}, known as the causal genes of MODY3 and MODY5, respectively, have been reported to be involved in regulation of DPP-IV gene expression. But, it is not completely clear (i) that they play roles in regulation of DPP-IV gene expression, and (ii) whether DPP-IV gene activity is changed by mutant HNF-1{alpha} and mutant HNF-1{beta} in MODY3 and MODY5. To explore these questions, we investigated transactivation effects of wild HNF-1{alpha} and 13 mutant HNF-1{alpha}, as well as wild HNF-1{beta} and 2 mutant HNF-1{beta}, on DPP-IV promoter luciferase gene in Caco-2 cells by means of a transient experiment. Both wild HNF-1{alpha} and wild HNF-1{beta} significantly transactivated DPP-IV promoter, but mutant HNF-1{alpha} and mutant HNF-1{beta} exhibited low transactivation activity. Moreover, to study whether mutant HNF-1{alpha} and mutant HNF-1{beta} change endogenous DPP-IV enzyme activity, we produced four stable cell lines from Caco-2 cells, in which wild HNF-1{alpha} or wild HNF-1{beta}, or else respective dominant-negative mutant HNF-1{alpha}T539fsdelC or dominant-negative mutant HNF-1{beta}R177X, was stably expressed. We found that DPP-IV gene expression and enzyme activity were significantly increased in wild HNF-1{alpha} cells and wild HNF-1{beta} cells, whereas they decreased in HNF-1{alpha}T539fsdelC cells and HNF-1{beta}R177X cells, compared with DPP-IV gene expression and enzyme activity in Caco-2 cells. These results suggest that both wild HNF-1{alpha} and wild HNF-1{beta} have a stimulatory effect on DPP-IV gene expression, but that mutant HNF-1{alpha} and mutant HNF-1{beta} attenuate the stimulatory effect.

  10. Biogeosciences, 11, 269280, 2014 www.biogeosciences.net/11/269/2014/

    E-Print Network [OSTI]

    Introduction Chl a is the primary phytoplankton pigment for photo- synthesis, whose concentration (hereafter-Viewing Wide Field-of-View Sensor) and MODIS (Moderate Resolution Imaging Spectroradiome- ter) (McClain, 2009

  11. The study of cirrus clouds using airborne and satellite data 

    E-Print Network [OSTI]

    Meyer, Kerry Glynne

    2004-09-30T23:59:59.000Z

    (AVIRIS) and the Moderate-resolution Infrared Spectroradiometer (MODIS), scientists now have an unprecedented ability to study cirrus clouds. To aid in the understanding of such clouds, a significant study of cirrus radiative properties has been undertaken...

  12. Global ice cloud observations: radiative properties and statistics from moderate-resolution imaging spectroradiometer measurements

    E-Print Network [OSTI]

    Meyer, Kerry Glynne

    2009-05-15T23:59:59.000Z

    Ice clouds occur quite frequently, yet so much about these clouds is unknown. In recent years, numerous investigations and field campaigns have been focused on the study of ice clouds, all with the ultimate goal of gaining a better understanding...

  13. Surface bidirectional reflectance and albedo properties derived using a land coverbased approach with Moderate Resolution

    E-Print Network [OSTI]

    Li, Zhanqing

    spring vegetation green up and autumn leaf fall, as well as changes due to agricultural practices a pixel-based fitting process. A good agreement was generally found between different data sets complexity and temporal variations of surface properties mean that practical albedo estimates over large area

  14. Assessment of Moderate- and High-Temperature Geothermal Resources...

    Open Energy Info (EERE)

    Moderate- and High-Temperature Geothermal Resources of the United States Jump to: navigation, search OpenEI Reference LibraryAdd to library Report: Assessment of Moderate- and...

  15. Optimally moderated nuclear fission reactor and fuel source therefor

    DOE Patents [OSTI]

    Ougouag, Abderrafi M. (Idaho Falls, ID); Terry, William K. (Shelley, ID); Gougar, Hans D. (Idaho Falls, ID)

    2008-07-22T23:59:59.000Z

    An improved nuclear fission reactor of the continuous fueling type involves determining an asymptotic equilibrium state for the nuclear fission reactor and providing the reactor with a moderator-to-fuel ratio that is optimally moderated for the asymptotic equilibrium state of the nuclear fission reactor; the fuel-to-moderator ratio allowing the nuclear fission reactor to be substantially continuously operated in an optimally moderated state.

  16. Fischer-Tropsch synthesis process employing a moderated ruthenium catalyst

    DOE Patents [OSTI]

    Abrevaya, H.

    1990-07-31T23:59:59.000Z

    A Fischer-Tropsch type process produces hydrocarbons from carbon monoxide and hydrogen using a novel catalyst comprising moderated ruthenium on an inorganic oxide support. The preferred moderator is silicon. Preferably the moderator is effectively positioned in relationship to ruthenium particles through simultaneous placement on the support using reverse micelle impregnation. 1 fig.

  17. Fischer-Tropsch synthesis process employing a moderated ruthenium catalyst

    DOE Patents [OSTI]

    Abrevaya, Hayim (Wilmette, IL)

    1990-01-01T23:59:59.000Z

    A Fischer-Tropsch type process produces hydrocarbons from carbon monoxide and hydrogen using a novel catalyst comprising moderated ruthenium on an inorganic oxide support. The preferred moderator is silicon. Preferably the moderator is effectively positioned in relationship to ruthenium particles through simultaneous placement on the support using reverse micelle impregnation.

  18. Correcting the MODIS snow albedo bias in Greenland based on in situ GC-Net measurements: Implications for the surface energy budget

    E-Print Network [OSTI]

    Zender, Charles

    Correcting the MODIS snow albedo bias in Greenland based on in situ GC-Net measurements). We have documented a systematic negative bias for SZA>55-60° in Greenland. This study uses in situ data from the Greenland Climate Network (GC-Net) to characterize and empirically correct the MODIS snow

  19. Assessment of MODIS cloud effective radius and optical thickness2 retrievals over the Southeast Pacific with VOCALS-Rex in-situ3

    E-Print Network [OSTI]

    Miami, University of

    in the Earth's radiation budget and the global climate.51 Cloud optical thickness (! ) and effective radius1 Assessment of MODIS cloud effective radius and optical thickness2 retrievals over, the standard 2.1 micron-derived MODIS32 effective radius (re) systematically exceeded the in-situ cloud

  20. Loan Programs for Low- and Moderate-Income Households | Department...

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

    Multifamily and Low-Income Housing Peer Exchange Call Series: Loan Programs for Low- and Moderate-Income Households, March 13, 2014. Call Slides and Discussion Summary More...

  1. Production And Characterization Of Tungsten-Based Positron Moderators

    SciTech Connect (OSTI)

    Lucio, O. G. de; Morales, J. G.; Cruz-Manjarrez, H. [Instituto de Fisica, Universidad Nacional Autonoma de Mexico, Apartado Postal 20-364 01000, Mexico DF (Mexico)

    2011-06-01T23:59:59.000Z

    Experiments of interest in Atomic Physics require production of well-defined low-energy positron beams through a moderation process of high-energy positrons, which can be produced by either the use of a radioactive source or by accelerator based pair production process. Tungsten is one of the most commonly used moderator materials because of its reasonable efficiency, high work function and relatively low cost. In this work we present different methods to produce tungsten-based candidate moderators in a variety of shapes. We also present results from characterizing these candidate moderators by ion beam analysis and microscopy techniques.

  2. High Resolution EELS | EMSL

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

    EELS EMSL's ultrahigh vacuum (UHV) surface chemistry-high-resolution electron energy loss spectroscopy (HREELS) system is designed to study the molecular-level chemistry...

  3. Conflict Resolution Day

    Broader source: Energy.gov [DOE]

    Conflict Resolution Day takes a look at mediation, conciliation, negotiation, arbitration, the ombudsman, and facilitation to resolve conflict in the workplace. Employees and contractors are...

  4. Very ice rich permafrost Moderately ice rich permafrost

    E-Print Network [OSTI]

    Ruess, Roger W.

    TK lake Very ice rich permafrost Permafrost forest Moderately ice rich permafrost Open Bog Open Fen characteristics (mainly ice content) and burn severity determine trajectories of ecosystem succession post in the presence of moderately ice rich permafrost but have high resilience only under low burn severity in very

  5. Viscous Undular Hydraulic Jumps of Moderate Reynolds number

    E-Print Network [OSTI]

    Shyamasundar, R.K.

    Viscous Undular Hydraulic Jumps of Moderate Reynolds number Ratul Dasgupta I will present some results on undular hydraulic jumps occurring in a two bores (in rivers), where the interface remains horizontal, the moderate Reynolds hydraulic jump shows a linear increase in height due to viscosity

  6. A Two-Step Filtering approach for detecting maize and soybean phenology with time-series MODIS data

    E-Print Network [OSTI]

    Gitelson, Anatoly

    Soybean MODIS Shape-model fitting The crop developmental stage represents essential information Program (CSP) at the University of Nebraska-Lincoln.A comparison of satellite-based retrievals with ground-based crop growth stage observations collected by the CSP over the six growing seasons for these three sites

  7. IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, VOL. 3, NO. 4, OCTOBER 2006 541 Estimation of Systematic Errors of MODIS

    E-Print Network [OSTI]

    Liang, Shunlin

    and in part by the National Natural Science Foundation of China under Grant 40471098. R. G. Liu and J. Y. Liu Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China (e-mail: liurg before launch [4], the small change in the optical status of MODIS instru- ments from voltage change, gas

  8. Changes in Sea-Level associated with Modi cations of the Mass Balance of the Greenland and Antarctic

    E-Print Network [OSTI]

    Changes in Sea-Level associated with Modi cations of the Mass Balance of the Greenland and Antarctic Ice Sheets over the 21st Century V eronique Bugnion Abstract Changes in runo from Greenland for estimating melting and runo . All models are solved on 20 and 40 km grids respectively for Greenland

  9. COMPARISON OF MODIS AND MISR-DERIVED SURFACE ALBEDO WITH IN SITU MEASUREMENTS IN GREENLAND

    E-Print Network [OSTI]

    Oldenburg, Carl von Ossietzky Universität

    visible and near infrared (NIR) data from sensors such as the NOAA Advanced Very High Resolution to spectral signatures for high- resolution snow albedo retrievals. This study evaluates snow surface albedo

  10. Cryogenic neutron moderator on mesitylene pellets for IBR-2 reactor

    E-Print Network [OSTI]

    Titov, Anatoly

    Cryogenic neutron moderator on mesitylene pellets for IBR-2 reactor Anan'ev V., Belyakov A the camera is 40 K Temperature inside the camera is 160 K (pellets stick to the baffle) #12;Fulfillment

  11. Rapidity evolution of gluon TMD from low to moderate x

    E-Print Network [OSTI]

    I. Balitsky; A. Tarasov

    2015-05-08T23:59:59.000Z

    We study how the rapidity evolution of gluon transverse momentum dependent distribution changes from nonlinear evolution at small $x \\ll 1$ to linear evolution at moderate $x \\sim 1$.

  12. Evolution of gluon TMD at low and moderate x

    E-Print Network [OSTI]

    I. Balitsky; A. Tarasov

    2014-11-05T23:59:59.000Z

    We study how the rapidity evolution of gluon transverse momentum dependent distribution changes from nonlinear evolution at small $x\\ll 1$ to linear double-logarithmic evolution at moderate $x\\sim 1$.

  13. Atmos. Chem. Phys., 11, 1026910281, 2011 www.atmos-chem-phys.net/11/10269/2011/

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    at high spatial resolutions. As clouds have a strong impact on the surface energy budget and hence high-resolution regional atmospheric conditions as an input for e.g. hydrological, land surface or air) used a 4DVAR system to assimilate Moderate Resolution Imaging Spectro- radiometer (MODIS) cloud optical

  14. Development of High Resolution Land Surface Parameters for the Community Land Model

    SciTech Connect (OSTI)

    Ke, Yinghai; Leung, Lai-Yung R.; Huang, Maoyi; Coleman, Andre M.; Li, Hongyi; Wigmosta, Mark S.

    2012-11-06T23:59:59.000Z

    There is a growing need for high-resolution land surface parameters as land surface models are being applied at increasingly higher spatial resolution offline as well as in regional and global models. The default land surface parameters for the most recent version of the Community Land Model (i.e. CLM 4.0) are at 0.5° or coarser resolutions, released with the Community Earth System Model (CESM). Plant Functional Types (PFTs), vegetation properties such as Leaf Area Index (LAI), Stem Area Index (SAI), and non-vegetated land covers were developed using remotely sensed datasets retrieved in late 1990’s and the beginning of this century. In this study, we developed new land surface parameters for CLM 4.0, specifically PFTs, LAI, SAI and non-vegetated land cover composition, at 0.05° resolution globally based on the most recent MODIS land cover and improved MODIS LAI products. Compared to the current CLM 4.0 parameters, the new parameters produced a decreased coverage by bare soil and trees, but an increased coverage by shrub, grass, and cropland. The new parameters result in a decrease in global seasonal LAI, with the biggest decrease in boreal forests; however, the new parameters also show a large increase in LAI in tropical forest. Differences between the new and the current parameters are mainly caused by changes in the sources of remotely sensed data and the representation of land cover in the source data. Advantages and disadvantages of each dataset were discussed in order to provide guidance on the use of the data. The new high-resolution land surface parameters have been used in a coupled land-atmosphere model (WRF-CLM) applied to the western U.S. to demonstrate their use in high-resolution modeling. A remapping method from the latitude/longitude grid of the CLM data to the WRF grids with map projection was also demonstrated. Future work will include global offline CLM simulations to examine the impacts of source data resolution and subsequent land parameter changes on simulated land surface processes.

  15. Enhancing Neutron Beam Production with a Convoluted Moderator

    SciTech Connect (OSTI)

    Iverson, Erik B [ORNL; Baxter, David V [Center for the Exploration of Energy and Matter, Indiana University; Muhrer, Guenter [Los Alamos National Laboratory (LANL); Ansell, Stuart [ISIS Facility, Rutherford Appleton Laboratory (ISIS); Gallmeier, Franz X [ORNL; Dalgliesh, Robert [ISIS Facility, Rutherford Appleton Laboratory (ISIS); Lu, Wei [ORNL; Kaiser, Helmut [Center for the Exploration of Energy and Matter, Indiana University

    2014-10-01T23:59:59.000Z

    We describe a new concept for a neutron moderating assembly resulting in the more efficient production of slow neutron beams. The Convoluted Moderator, a heterogeneous stack of interleaved moderating material and nearly transparent single-crystal spacers, is a directionally-enhanced neutron beam source, improving beam effectiveness over an angular range comparable to the range accepted by neutron beam lines and guides. We have demonstrated gains of 50% in slow neutron intensity for a given fast neutron production rate while simultaneously reducing the wavelength-dependent emission time dispersion by 25%, both coming from a geometric effect in which the neutron beam lines view a large surface area of moderating material in a relatively small volume. Additionally, we have confirmed a Bragg-enhancement effect arising from coherent scattering within the single-crystal spacers. We have not observed hypothesized refractive effects leading to additional gains at long wavelength. In addition to confirmation of the validity of the Convoluted Moderator concept, our measurements provide a series of benchmark experiments suitable for developing simulation and analysis techniques for practical optimization and eventual implementation at slow neutron source facilities.

  16. High Resolution Timing with Low Resolution Clocks A Microsecond Resolution Timer for Sun Workstations

    E-Print Network [OSTI]

    Melvin, Stephen

    High Resolution Timing with Low Resolution Clocks and A Microsecond Resolution Timer for Sun for Sun 3 and Sun 4 workstations1. One can measure average service times without a high resolution clock?" 1. Introduction - Who Needs a Microsecond Clock Beginning with its Sun 3 workstations, Sun

  17. A modular approach to the design of cold moderators

    SciTech Connect (OSTI)

    Lucas, A.T.

    1998-11-01T23:59:59.000Z

    Cold moderators are usually designed to the specific requirements of the parent neutron source. However since all cryogenic moderators within a broad design envelope require certain common parameters, it should be possible to create a central core design served by smaller packages designed, or selected to satisfy a wide range of individual requirements. This paper describes a modular design philosophy that has been applied to two very different cold sources with only minor changes to two of the modules in the system. Both of the systems and the basic differences between them are described in detail.

  18. High resolution data acquisition

    DOE Patents [OSTI]

    Thornton, G.W.; Fuller, K.R.

    1993-04-06T23:59:59.000Z

    A high resolution event interval timing system measures short time intervals such as occur in high energy physics or laser ranging. Timing is provided from a clock, pulse train, and analog circuitry for generating a triangular wave synchronously with the pulse train (as seen in diagram on patent). The triangular wave has an amplitude and slope functionally related to the time elapsed during each clock pulse in the train. A converter forms a first digital value of the amplitude and slope of the triangle wave at the start of the event interval and a second digital value of the amplitude and slope of the triangle wave at the end of the event interval. A counter counts the clock pulse train during the interval to form a gross event interval time. A computer then combines the gross event interval time and the first and second digital values to output a high resolution value for the event interval.

  19. High resolution data acquisition

    DOE Patents [OSTI]

    Thornton, Glenn W. (Los Alamos, NM); Fuller, Kenneth R. (Los Alamos, NM)

    1993-01-01T23:59:59.000Z

    A high resolution event interval timing system measures short time intervals such as occur in high energy physics or laser ranging. Timing is provided from a clock (38) pulse train (37) and analog circuitry (44) for generating a triangular wave (46) synchronously with the pulse train (37). The triangular wave (46) has an amplitude and slope functionally related to the time elapsed during each clock pulse in the train. A converter (18, 32) forms a first digital value of the amplitude and slope of the triangle wave at the start of the event interval and a second digital value of the amplitude and slope of the triangle wave at the end of the event interval. A counter (26) counts the clock pulse train (37) during the interval to form a gross event interval time. A computer (52) then combines the gross event interval time and the first and second digital values to output a high resolution value for the event interval.

  20. Particle detector spatial resolution

    DOE Patents [OSTI]

    Perez-Mendez, Victor (Berkeley, CA)

    1992-01-01T23:59:59.000Z

    Method and apparatus for producing separated columns of scintillation layer material, for use in detection of X-rays and high energy charged particles with improved spatial resolution. A pattern of ridges or projections is formed on one surface of a substrate layer or in a thin polyimide layer, and the scintillation layer is grown at controlled temperature and growth rate on the ridge-containing material. The scintillation material preferentially forms cylinders or columns, separated by gaps conforming to the pattern of ridges, and these columns direct most of the light produced in the scintillation layer along individual columns for subsequent detection in a photodiode layer. The gaps may be filled with a light-absorbing material to further enhance the spatial resolution of the particle detector.

  1. Particle detector spatial resolution

    DOE Patents [OSTI]

    Perez-Mendez, V.

    1992-12-15T23:59:59.000Z

    Method and apparatus for producing separated columns of scintillation layer material, for use in detection of X-rays and high energy charged particles with improved spatial resolution is disclosed. A pattern of ridges or projections is formed on one surface of a substrate layer or in a thin polyimide layer, and the scintillation layer is grown at controlled temperature and growth rate on the ridge-containing material. The scintillation material preferentially forms cylinders or columns, separated by gaps conforming to the pattern of ridges, and these columns direct most of the light produced in the scintillation layer along individual columns for subsequent detection in a photodiode layer. The gaps may be filled with a light-absorbing material to further enhance the spatial resolution of the particle detector. 12 figs.

  2. High resolution telescope

    DOE Patents [OSTI]

    Massie, Norbert A. (San Ramon, CA); Oster, Yale (Danville, CA)

    1992-01-01T23:59:59.000Z

    A large effective-aperture, low-cost optical telescope with diffraction-limited resolution enables ground-based observation of near-earth space objects. The telescope has a non-redundant, thinned-aperture array in a center-mount, single-structure space frame. It employs speckle interferometric imaging to achieve diffraction-limited resolution. The signal-to-noise ratio problem is mitigated by moving the wavelength of operation to the near-IR, and the image is sensed by a Silicon CCD. The steerable, single-structure array presents a constant pupil. The center-mount, radar-like mount enables low-earth orbit space objects to be tracked as well as increases stiffness of the space frame. In the preferred embodiment, the array has elemental telescopes with subaperture of 2.1 m in a circle-of-nine configuration. The telescope array has an effective aperture of 12 m which provides a diffraction-limited resolution of 0.02 arc seconds. Pathlength matching of the telescope array is maintained by an electro-optical system employing laser metrology. Speckle imaging relaxes pathlength matching tolerance by one order of magnitude as compared to phased arrays. Many features of the telescope contribute to substantial reduction in costs. These include eliminating the conventional protective dome and reducing on-site construction activites. The cost of the telescope scales with the first power of the aperture rather than its third power as in conventional telescopes.

  3. Clinical Studies MLH1 Founder Mutations with Moderate Penetrance in

    E-Print Network [OSTI]

    Rosenberg, Noah

    Clinical Studies MLH1 Founder Mutations with Moderate Penetrance in Spanish Lynch Syndrome Families>A and c.1865T>A (p.Leu622His) of the DNA repair gene MLH1 occur frequently in Spanish Lynch syndrome estimated for other path- ogenic Spanish MLH1 mutations. A common haplotype was associated with each

  4. THORIUM FUEL CYCLES: A GRAPHITE-MODERATED MOLTEN SALT REACTOR

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    THORIUM FUEL CYCLES: A GRAPHITE-MODERATED MOLTEN SALT REACTOR VERSUS A FAST SPECTRUM SOLID FUEL is to compare two main options dedicated to long-term energy production with Thorium: solid fuel with fast its be- haviour until it reaches the 232Th/233U equilibrium from two di erent starting fuels: 232Th

  5. Family Moderate Income Homeowners In New York State

    Broader source: Energy.gov [DOE]

    "Family Moderate Income Homeowners In New York State: Enhancing Resource Accessibility Through Process Improvement and Targeted Outreach," by Residential Energy Efficiency Solutions, July 10, 2012, Arlington, Virginia. Provides an overview of broadening accessibility to financing through process improvement and targeted outreach.

  6. High resolution time interval meter

    DOE Patents [OSTI]

    Martin, A.D.

    1986-05-09T23:59:59.000Z

    Method and apparatus are provided for measuring the time interval between two events to a higher resolution than reliability available from conventional circuits and component. An internal clock pulse is provided at a frequency compatible with conventional component operating frequencies for reliable operation. Lumped constant delay circuits are provided for generating outputs at delay intervals corresponding to the desired high resolution. An initiation START pulse is input to generate first high resolution data. A termination STOP pulse is input to generate second high resolution data. Internal counters count at the low frequency internal clock pulse rate between the START and STOP pulses. The first and second high resolution data are logically combined to directly provide high resolution data to one counter and correct the count in the low resolution counter to obtain a high resolution time interval measurement.

  7. Standard practice for evaluation of surveillance capsules from light-water moderated nuclear power reactor vessels

    E-Print Network [OSTI]

    American Society for Testing and Materials. Philadelphia

    2010-01-01T23:59:59.000Z

    Standard practice for evaluation of surveillance capsules from light-water moderated nuclear power reactor vessels

  8. 1228 IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 36, NO. 4, JULY 1998 The Moderate Resolution Imaging

    E-Print Network [OSTI]

    Myneni, Ranga B.

    , 1997; revised March 2, 1998. C. O. Justice is with the University of Virginia, Charlottesville, VA, Boston, MA 02215 USA. S. W. Running and R. R. Nemani are with the University of Montana, Missoula, MN

  9. Continuous tree distribution in China: A comparison of two estimates from Moderate-Resolution Imaging Spectroradiometer and Landsat

    E-Print Network [OSTI]

    Liang, Shunlin

    , China is believed to be a major location of forest carbon sinks today [Fang et al., 2001; Streets et al., 2001]. However, the estimates of the magnitude of China's terrestrial carbon sink vary considerably]. Understanding the carbon sequestration potential and its variation responses to climate variability in China

  10. Environmental Conflict Resolution | Department of Energy

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

    Environmental Conflict Resolution Environmental Conflict Resolution ENVIRONMENTAL CONFLICT RESOLUTION In September 2012, the Council on Environmental Quality (CEQ) and the Office...

  11. Harmonic resolution as a holographic quantum number

    E-Print Network [OSTI]

    Bousso, Raphael

    2009-01-01T23:59:59.000Z

    LBNL- 57239 Harmonic resolution as a holographic quantumhep-th/0310223 UCB-PTH-03/26 Harmonic resolution as aquantum number, the harmonic resolution K. The Bekenstein

  12. Ice in Volcanic Clouds: When and Where? William I Rose, Gregg JS Bluth and I Matthew Watson

    E-Print Network [OSTI]

    Bluth, Gregg

    of large ash particles in descent. Ash fall occurs most markedly from the high energy first stage Very High Resolution Radiometer; MODIS= Moderate Resolution Imaging Spectroradiometer; ASTER= Advanced Spaceborne Thermal Emission and Reflection Radiometer; TOMS= Total Ozone Mapping Spectrometer occur and when

  13. Evaluation of Satellite Estimates of Land Surface Temperature from GOES over the United States

    E-Print Network [OSTI]

    Sun, Donglian

    , and it is an indicator of the energy balance at the earth's surface (Sellers et al. 1988). LST retrievals are more for several decades. The focus was on polar-orbiting systems, such as the Advanced Very High Resolution Radiometer (AVHRR) and the Moderate Resolution Imaging Spectroradiometer (MODIS), because of global coverage

  14. 1 Resolution 1.1 Resolution in propositional logic

    E-Print Network [OSTI]

    Charatonik, Witold

    is satisfiable if there exists a valuation such that ^() = T for all F; otherwise we say that F consequence of F if all valuations satisfying F also satisfy . Observation 3. A formula is a logical the soundness theorem for resolution method (If there exists a resolution proof of inconsistency of a set

  15. Longwave radiative forcing of Saharan dust aerosols estimated from MODIS, MISR, and CERES observations on Terra

    E-Print Network [OSTI]

    Christopher, Sundar A.

    observations from the Advanced Very High Resolution Radiometer (AVHRR) [Ackerman and Chung, 1992] and the Total's Radiant Energy System (CERES) instruments onboard the Terra satellite; we present a new technique prevalent in the tropics [Prospero, 1999], dust aerosols are effective in reflecting solar energy back

  16. Consistency of MODIS surface bidirectional reflectance distribution function and albedo retrievals

    E-Print Network [OSTI]

    Liang, Shunlin

    as historical global albedos from advanced very high resolution radiometer (AVHRR) and Earth Radiation Budget albedos and the Clouds and Earth's Radiant Energy System (CERES) top-of-the-atmosphere albedos as well observations, and a high bias of 0.016 and a low bias of 0.034 compared to those of the latter albedos

  17. A Near-Global Climatology of Single-Layer and Overlapped Clouds and Their Optical Properties Retrieved from Terra/MODIS Data Using a New Algorithm

    E-Print Network [OSTI]

    Li, Zhanqing

    Retrieved from Terra/MODIS Data Using a New Algorithm FU-LUNG CHANG Earth System Science Interdisciplinary Center, University of Maryland, College Park, College Park, Maryland ZHANQING LI Earth System Science) trapping longwave radiation in the earth­atmosphere system. Unlike many low clouds that have a cooling

  18. Enhanced High Resolution RBS System

    SciTech Connect (OSTI)

    Pollock, Thomas J.; Hass, James A.; Klody, George M. [National Electrostatics Corp., Middleton, Wisconsin, U. S. A. 53562-0310 (United States)

    2011-06-01T23:59:59.000Z

    Improvements in full spectrum resolution with the second NEC high resolution RBS system are summarized. Results for 50 A ring TiN/HfO films on Si yielding energy resolution on the order of 1 keV are also presented. Detector enhancements include improved pulse processing electronics, upgraded shielding for the MCP/RAE detector, and reduced noise generated from pumping. Energy resolution measurements on spectra front edge coupled with calculations using 0.4mStr solid angle show that beam energy spread at 400 KeV from the Pelletron registered accelerator is less than 100 eV. To improve user throughput, magnet control has been added to the automatic data collection. Depth profiles derived from experimental data are discussed. For the thin films profiled, depth resolutions were on the Angstrom level with the non-linear energy/channel conversions ranging from 100 to 200 eV.

  19. Performance of a Moderating Neutron Spectrometer That Uses Scintillating Fibers

    SciTech Connect (OSTI)

    Bliss, Mary; Craig, Richard A.; Barnett, Debra S.; Anderson, Dale N.; Smart, John E.; Knopf, Michael A.; Hartley, Stacey A.

    2001-08-03T23:59:59.000Z

    The Bonner sphere is the canonical example of instruments that provide a measure of neutron spectra by using moderating and absorbing materials together with thermal-neutron detectors. For such spectrometers, the instrument response reflects a statistical average of the energy spectrum. Pacific Northwest National Laboratory has developed neutron-sensitive cerium-activated scintillating fibers composed of lithium-silicate glass. These fibers present an enabling technology for efficient neutron spectroscopy. A moderating spectrometer was built as a testbed for materials identification. Based on the results of Monte Carlo experiments, six fiber layers are separated by polyethylene layers whose thickness has been chosen to maximize neutron spectral information. The completed, self-contained instrument, including electronics and data logging computer has a mass less than 35 kg, slightly more than half of which is polyethylene. Measurements have been performed by this instrument with various sources representing hard and soft neutron spectra. Because this instrument is a technology testbed, the data are recorded as pulse-height spectra. Results and future directions are presented.

  20. High-resolution solid-state NMR of anisotropically mobile molecules under very low-power 1

    E-Print Network [OSTI]

    Hong, Mei

    High-resolution solid-state NMR of anisotropically mobile molecules under very low-power 1 H Revised 13 May 2009 Available online 21 May 2009 Keywords: Low-power decoupling Lipid membranes Solid such as WALTZ-16. We demonstrate this moderate MAS low-power decoupling technique on hydrated POPC lipid

  1. Moderate threat causes longer lasting disruption to processing in anxious individuals

    E-Print Network [OSTI]

    Bishop, Sonia

    Moderate threat causes longer lasting disruption to processing in anxious individuals Sophie: Forster S, Castle E, Nunez-elizalde AO and Bishop SJ(2014) Moderate threat causes longer lasting in anxiety1 Moderate threat causes longer lasting disruption to processing2 in anxious individuals.3 Sophie

  2. The Great Moderation and Leptokurtosis after GARCH WenShwo Fang

    E-Print Network [OSTI]

    Ahmad, Sajjad

    The Great Moderation and Leptokurtosis after GARCH Adjustment WenShwo Fang Department of Economics that this finding of fat tails may reflect the Great Moderation. That is, leptokurtosis disappears after GARCH Moderation, leptokurtosis, GARCH models JEL classification: C32; E32; O40 * Corresponding author #12

  3. Moderation control in low enriched {sup 235}U uranium hexafluoride packaging operations and transportation

    SciTech Connect (OSTI)

    Dyer, R.H. [USDOE Oak Ridge Operations Office, TN (United States); Kovac, F.M. [Oak Ridge National Lab., TN (United States); Pryor, W.A. [PAI Corp., Oak Ridge, TN (United States)

    1993-10-01T23:59:59.000Z

    Moderation control is the basic parameter for ensuring nuclear criticality safety during the packaging and transport of low {sup 235}U enriched uranium hexafluoride before its conversion to nuclear power reactor fuel. Moderation control has permitted the shipment of bulk quantities in large cylinders instead of in many smaller cylinders and, therefore, has resulted in economies without compromising safety. Overall safety and uranium accountability have been enhanced through the use of the moderation control. This paper discusses moderation control and the operating procedures to ensure that moderation control is maintained during packaging operations and transportation.

  4. Conceptual design of a pressure tube light water reactor with variable moderator control

    SciTech Connect (OSTI)

    Rachamin, R.; Fridman, E. [Reactor Safety Div., Inst. of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, POB 51 01 19, 01314 Dresden (Germany); Galperin, A. [Dept. of Nuclear Engineering, Ben-Gurion Univ. of the Negev, POB 653, Beer Sheva 84105 (Israel)

    2012-07-01T23:59:59.000Z

    This paper presents the development of innovative pressure tube light water reactor with variable moderator control. The core layout is derived from a CANDU line of reactors in general, and advanced ACR-1000 design in particular. It should be stressed however, that while some of the ACR-1000 mechanical design features are adopted, the core design basics of the reactor proposed here are completely different. First, the inter fuel channels spacing, surrounded by the calandria tank, contains a low pressure gas instead of heavy water moderator. Second, the fuel channel design features an additional/external tube (designated as moderator tube) connected to a separate moderator management system. The moderator management system is design to vary the moderator tube content from 'dry' (gas) to 'flooded' (light water filled). The dynamic variation of the moderator is a unique and very important feature of the proposed design. The moderator variation allows an implementation of the 'breed and burn' mode of operation. The 'breed and burn' mode of operation is implemented by keeping the moderator tube empty ('dry' filled with gas) during the breed part of the fuel depletion and subsequently introducing the moderator by 'flooding' the moderator tube for the 'burn' part. This paper assesses the conceptual feasibility of the proposed concept from a neutronics point of view. (authors)

  5. Optimizing moderator dimensions for neutron scattering at the spallation neutron source

    SciTech Connect (OSTI)

    Zhao, J. K.; Robertson, J. L.; Herwig, Kenneth W.; Gallmeier, Franz X.; Riemer, Bernard W. [Instrument and Source Division, Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)] [Instrument and Source Division, Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

    2013-12-15T23:59:59.000Z

    In this work, we investigate the effect of neutron moderator dimensions on the performance of neutron scattering instruments at the Spallation Neutron Source (SNS). In a recent study of the planned second target station at the SNS facility, we have found that the dimensions of a moderator play a significant role in determining its surface brightness. A smaller moderator may be significantly brighter over a smaller viewing area. One of the immediate implications of this finding is that for modern neutron scattering instrument designs, moderator dimensions and brightness have to be incorporated as an integrated optimization parameter. Here, we establish a strategy of matching neutron scattering instruments with moderators using analytical and Monte Carlo techniques. In order to simplify our treatment, we group the instruments into two broad categories: those with natural collimation and those that use neutron guide systems. For instruments using natural collimation, the optimal moderator selection depends on the size of the moderator, the sample, and the moderator brightness. The desired beam divergence only plays a role in determining the distance between sample and moderator. For instruments using neutron optical systems, the smallest moderator available that is larger than the entrance dimension of the closest optical element will perform the best (assuming, as is the case here that smaller moderators are brighter)

  6. High Resolution Nanoimprint for Nanophotonics 

    E-Print Network [OSTI]

    Jiang, Youwei

    2014-04-28T23:59:59.000Z

    of SERS-active device depends on two main factors: good reproducibility and high enhancement factor. Ordered metallic nanostructures with high resolution are usually preferred for SERS application. Nanoimprint lithography can provide a low-cost and high...

  7. Nanometer Resolution Imaging by SIngle Molecule Switching. |...

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

    Nanometer Resolution Imaging by SIngle Molecule Switching. Nanometer Resolution Imaging by SIngle Molecule Switching. Abstract: The fluorescence intensity of single molecules can...

  8. STORM/PALM - Super Resolution Fluorescence Microscope | EMSL

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

    STORMPALM - Super Resolution Fluorescence Microscope STORMPALM - Super Resolution Fluorescence Microscope EMSL has developed and offers Fluorescence, Super Resolution STORM...

  9. Dielectric microscopy with submillimeter resolution

    E-Print Network [OSTI]

    Nathan S. Greeney; John A. Scales

    2007-06-20T23:59:59.000Z

    In analogy with optical near-field scanning methods, we use tapered dielectric waveguides as probes for a millimeter wave vector network analyzer. By scanning thin samples between two such probes we are able to map the spatially varying dielectric properties of materials with sub-wavelength resolution; using a 150 GHz probe in transmision mode we see spatial resolution of around 500 microns. We have applied this method to a variety of highly heterogeneous materials. Here we show dielectric maps of granite and oil shale.

  10. advanced gas cooled graphite moderated reactor: Topics by E-print...

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

    temperatures during normal (more) Moore, Eugene James Thomas 2006-01-01 2 THORIUM FUEL CYCLES: A GRAPHITE-MODERATED MOLTEN SALT REACTOR Physics Websites Summary: ,...

  11. Optimizing moderation of He-3 neutron detectors for shielded fission sources

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

    Rees, Lawrence B.; Czirr, J. Bart

    2012-11-01T23:59:59.000Z

    Abstract: The response of 3-He neutron detectors is highly dependent on the amount of moderator incorporated into the detector system. If there is too little moderation, neutrons will not react with the 3-He. If there is too much moderation, neutrons will not reach the 3-He. In applications for portal or border monitors where 3He detectors are used to interdict illicit Importation of plutonium, the fission source is always shielded to some extent. Since the energy distribution of neutrons emitted from the source depends on the amount and type of shielding present, the optimum placement of moderating material around 3-He tubesmore »is a function of shielding. In this paper, we use Monte Carlo techniques to model the response of 3-He tubes placed in polyethylene boxes for moderation. To model the shielded fission neutron source, we use a 252-Cf source placed in the center of spheres of water of varying radius. Detector efficiency as a function of box geometry and shielding are explored. We find that increasing the amount of moderator behind and to the sides of the detector generally improves the detector response, but that benefits are limited if the thickness of the polyethylene moderator is greater than about 5-7 cm. The thickness of the moderator in front of the 3He tubes, however, is very important. For bare sources, about 5-6 cm of moderator is optimum, but as the shielding increases, the optimum thickness of this moderator decreases to 0-1 cm. A two-tube box with a moderator thickness of 5 cm in front of the first tube and a thickness of 1 cm in front of the second tube is proposed to improve the detector's sensitivity to lower-energy neutrons.« less

  12. Optimizing moderation of He-3 neutron detectors for shielded fission sources

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

    Rees, Lawrence B. [Brigham Young University, Provo, UT (United States); Czirr, J. Bart [Brigham Young University, Provo, UT (United States)

    2012-11-01T23:59:59.000Z

    Abstract: The response of 3-He neutron detectors is highly dependent on the amount of moderator incorporated into the detector system. If there is too little moderation, neutrons will not react with the 3-He. If there is too much moderation, neutrons will not reach the 3-He. In applications for portal or border monitors where 3He detectors are used to interdict illicit Importation of plutonium, the fission source is always shielded to some extent. Since the energy distribution of neutrons emitted from the source depends on the amount and type of shielding present, the optimum placement of moderating material around 3-He tubes is a function of shielding. In this paper, we use Monte Carlo techniques to model the response of 3-He tubes placed in polyethylene boxes for moderation. To model the shielded fission neutron source, we use a 252-Cf source placed in the center of spheres of water of varying radius. Detector efficiency as a function of box geometry and shielding are explored. We find that increasing the amount of moderator behind and to the sides of the detector generally improves the detector response, but that benefits are limited if the thickness of the polyethylene moderator is greater than about 5-7 cm. The thickness of the moderator in front of the 3He tubes, however, is very important. For bare sources, about 5-6 cm of moderator is optimum, but as the shielding increases, the optimum thickness of this moderator decreases to 0-1 cm. A two-tube box with a moderator thickness of 5 cm in front of the first tube and a thickness of 1 cm in front of the second tube is proposed to improve the detector's sensitivity to lower-energy neutrons.

  13. DOWN-SCALING OF SEBAL DERIVED EVAPOTRANSPIRATION MAPS1 FROM MODIS (250m) TO LANDSAT (30m) SCALE2

    E-Print Network [OSTI]

    Borchers, Brian

    Landsat imagery in order to obtain both high temporal and high spatial resolution. The Surface17 Energy High Resolution Radiometer (AVHRR) and36 Geostationary Orbiting Environmental Satellite (GOES) have Mexico Tech, Dept. of Mathematics, Socorro, NM 878018 9 ABSTRACT10 11 The major problem with high spatial

  14. Goddard Scientific Colloquium, May 4, 2012 Aqua at Ten Years and Counting

    E-Print Network [OSTI]

    Sounder for Brazil · CERES: Clouds and the Earth s Radiant Energy System · MODIS: Moderate Resolution Imaging Spectroradiometer · AMSR-E: Advanced Microwave Scanning Radiometer for the Earth Observing System;Electro- magnetic Spectrum Wavelength (short to long) Radiation Type Frequency (high to low) Aqua measure

  15. Evaluation of chlorophyll-a remote sensing algorithms for an optically complex estuary

    E-Print Network [OSTI]

    Meyers, Steven D.

    Evaluation of chlorophyll-a remote sensing algorithms for an optically complex estuary Chengfeng Le to derive Chla based on red and near-infrared wavelengths to avoid such problems. Using in situ data sensors such as the MODIS (Moderate Resolution Imaging Spectroradiometer, 1999­present for Terra, 2002

  16. Evolution of supra-glacial lakes across the Greenland Ice Sheet 

    E-Print Network [OSTI]

    Sundal, Aud

    2008-12-05T23:59:59.000Z

    We used 268 cloud-free Moderate-resolution Imaging Spectroradiometer (MODIS) images spanning the melt seasons 2003 and 2005-2007 to study the seasonal evolution of supra-glacial lakes in three different regions of the Greenland ice sheet. Lake area...

  17. Cloud frequency climatology at the Andes/Amazon transition: 1. Seasonal and diurnal cycles

    E-Print Network [OSTI]

    Malhi, Yadvinder

    Cloud frequency climatology at the Andes/Amazon transition: 1. Seasonal and diurnal cycles Kate-scale cloud patterns. We examine the cloud climatology of a tropical Andean montane region in the context Satellite Cloud Climatology Project) DX cloud product (1983­2008), MODIS (Moderate Resolution Imaging

  18. Report on the international workshop on cold moderators for pulsed neutron sources.

    SciTech Connect (OSTI)

    Carpenter, J. M.

    1999-01-06T23:59:59.000Z

    The International Workshop on Cold Moderators for Pulsed Neutron Sources resulted from the coincidence of two forces. Our sponsors in the Materials Sciences Branch of DOE's Office of Energy Research and the community of moderator and neutron facility developers both realized that it was time. The Neutron Sources Working Group of the Megascience Forum of the Organization for Economic Cooperation and Development offered to contribute its support by publishing the proceedings, which with DOE and Argonne sponsorship cemented the initiative. The purposes of the workshop were: to recall and improve the theoretical groundwork of time-dependent neutron thermalization; to pose and examine the needs for and benefits of cold moderators for neutron scattering and other applications of pulsed neutron sources; to summarize experience with pulsed source, cold moderators, their performance, effectiveness, successes, problems and solutions, and the needs for operational data; to compile and evaluate new ideas for cold moderator materials and geometries; to review methods of measuring and characterizing pulsed source cold moderator performance; to appraise methods of calculating needed source characteristics and to evaluate the needs and prospects for improvements; to assess the state of knowledge of data needed for calculating the neutronic and engineering performance of cold moderators; and to outline the needs for facilities for testing various aspects of pulsed source cold moderator performance.

  19. "Ideological Innocence" and Voter Choice: Why Empowering The People Doesn't Help Moderate

    E-Print Network [OSTI]

    Sekhon, Jasjeet S.

    Candidates Douglas J. Ahler David E. Broockman June 9, 2014 WORKING PAPER Abstract Recent electoral reforms, early indications suggest these reforms fail to help moderate candidates. We suggest an explanation. Reformers assume that ideological centrism in the electorate reflects voters' support for moderate policies

  20. The Effect of Moderate Parkinson's Disease on the Biomechanics of Compensatory Backwards Stepping

    E-Print Network [OSTI]

    McVey, Molly Ann

    2012-08-31T23:59:59.000Z

    disturbance in moderate PD, and found that patients with moderate PD utilized more steps to regain balance, had a longer weight shift time, and used a base-width neutral step as a strategy to regain balance, compared to controls. The second study further...

  1. Policy on Moderation of Assessment In May 2013, the Senate approved, for implementation

    E-Print Network [OSTI]

    Painter, Kevin

    Policy on Moderation of Assessment In May 2013, the Senate approved, for implementation with effect from 2013/14, a Policy on the Moderation of Assessment. The aim is: To assure the University policies covers: All qualifying assessments contributing to the degree awards associated with a programme

  2. Seismic vulnerability analysis of moderate seismicity areas using in situ experimental

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Seismic vulnerability analysis of moderate seismicity areas using in situ experimental techniques (LGIT), LCPC, CNRS, Université Joseph Fourier Grenoble Abstract Seismic vulnerability analysis. This curve is particularly interesting in moderate seismic areas. This methodology is applied to the Grenoble

  3. Orbifold resolutions with general profile

    E-Print Network [OSTI]

    Andrea Wulzer

    2005-07-28T23:59:59.000Z

    A very general class of resolved versions of the C/Z_N, T^2/Z_N and S^1/Z_2 orbifolds is considered and the free theory of 6D chiral fermions studied on it. As the orbifold limit is taken, localized 4D chiral massless fermions are seen to arise at the fixed points. Their number, location and chirality is found to be independent on the detailed profile of the resolving space and to agree with the result of hep-th/0409229, in which a particular resolution was employed. As a consistency check of the resolution procedure, the massive equation is numerically studied. In particular, for S^1/Z_2, the "resolved" mass--spectrum and wave functions in the internal space are seen to correctly reproduce the usual orbifold ones, as the orbifold limit is taken.

  4. Nonlinear effects in kinetic resolutions

    E-Print Network [OSTI]

    Johnson, Derrell W.

    1999-01-01T23:59:59.000Z

    KTRIC AMPLIFICATION IN THE JACOBSEN HYDROLYTIC KINET RESOLUTION OF RACEMIC EPOXIDES 20 Applicability of Homocompetitive Reaction Kinetics to the Jacobsen HKR Effect of Catalyst EE and Choice of Epoxide on Amplification in the Jacobsen HKR.... . . . . . . . . . . . . . . . . . Effect of Temperature on Amplification and Reaction Rate in the Jacobsen HKR . Effect of Low EE Catalyst Generation on Amplification in the Jacobsen HKR. . . . 21 21 25 26 27 30 31 TABLE OF CONTENTS (Continued) CHAPTER Page V AS...

  5. Optimizing Moderator Dimensions for Neutron Scattering at the Spallation Neutron Source

    SciTech Connect (OSTI)

    Zhao, Jinkui [ORNL; Robertson, Lee [ORNL; Herwig, Kenneth W [ORNL; Gallmeier, Franz X [ORNL; Riemer, Bernie [ORNL

    2013-01-01T23:59:59.000Z

    In this work, we investigate the effect of neutron moderator dimensions on the performance of neutron scattering instruments at the Spallation Neutron Source. In a recent study of the planned second target station at the Spallation Neutron Source (SNS) facility [1,2], we have found that the dimensions of a moderator play a significant role in determining its surface brightness. A smaller moderator may be significantly brighter for a smaller viewing area [4]. One of the immediate implications of this finding is that for modern neutron scattering instrument designs, moderator dimensions and brightness have to be incorporated as an integrated optimization parameter. Here, we establish a strategy of matching neutron scattering instruments with moderators using analytical and Monte Carlo techniques. In order to simplify our treatment, we group the instruments into two broad categories, those with natural collimation and those that use neutron guide systems. We found that the cross-sections of the sample and the neutron guide, respectively, are the deciding factors for choosing the moderator. Beam divergence plays no role as long as it is within the reach of practical constraints. Namely, the required divergence is not too large for the guide or sample to be located close enough to the moderator on an actual spallation source.

  6. CAUSAL ANALYSIS OF THE UNCONTROLLED MODERATOR IN THE HFEF MAIN CELL

    SciTech Connect (OSTI)

    Charles R. Posegate; Bryan P. Crofts

    2012-12-01T23:59:59.000Z

    On 11/07/2012 while investigating the cause of defects in neutron radiography film at HFEF, oil was discovered near the elevator shaft located at the 4M location within the Main Cell. Subsequent investigation identified oil (untracked moderator) in several locations ofthe HFEF Main Cell. Initial analysis determined that oil leaking from a 1M shielding window had leaked past a compensatory containment system resulting in a thin layer of oil found in several locations on the main cell floor. The result of this condition is uncontrolled moderator in moderator controlled zones, which is a violation of Criticality Hazard Control Statements (CHCS) for HFEF.

  7. Surface Signature of Flow Past a Sphere at Moderate Reynolds Numbers 

    E-Print Network [OSTI]

    Shao, Qi

    2014-04-29T23:59:59.000Z

    The incompressible viscous flow past a sphere is investigated numerically at moderate Reynolds numbers. Periodic vortex shedding happens at these Reynolds numbers. The primary objective is to identify the surface signature when the wake reaches...

  8. Measurement of cryogenic moderator temperature effects in a small heterogeneous thermal reactor

    SciTech Connect (OSTI)

    Hoovler, G.S.; Ball, R.M.; Lewis, R.H.

    1994-12-31T23:59:59.000Z

    Past papers have described a critical experiment (CX) built at Sandia National Laboratories to investigate the neutronic behavior of the particle-bed reactor (PBK). Among the experiments previously reported were tests to measure the reactivity effect of uniform temperature variations between 20 and 80{degree}C. This paper describes additional experiments designed to examine the effects of cryogenic moderator temperatures on core reactivity and neutron spectrum. The general importance of temperature effects to the design of the PBR have been previously discussed. A unique feature of the PBR is that the moderator may be at cryogenic temperatures during reactor startup. Because temperature effects in small, heterogeneous thermal reactors can be significant and because we found no integral measurements with cryogenic moderators in such systems, an experiment with a cryogenic moderator was designed and performed in the CX as an extension to the isothermal measurements previously reported.

  9. ccsd-00017207,version1-17Jan2006 Large and moderate deviations principles

    E-Print Network [OSTI]

    Boyer, Edmond

    of the iterated logarithm of the recursive density estima- tor was established by Wegman and Davies (1979 of Wegman (1972), Ahmad and Lin (1976), and Carroll (1976). Recently, large and moderate deviations results

  10. Building equity : the evolution and efficacy of Montgomery County's moderately priced dwelling unit legislation

    E-Print Network [OSTI]

    Jakabovics, Andrew, 1976-

    2004-01-01T23:59:59.000Z

    This thesis describes the history of Montgomery County, Maryland's Moderately Priced Dwelling Unit (MPDU) law. Passed in 1973, it is the oldest inclusionary zoning legislation in the country. The law emerged out of three ...

  11. On the Importance of Strengthening Moderate Beliefs in Climate Science to Foster Support for Immediate Action

    E-Print Network [OSTI]

    Wendling, Zachary A.; Attari, Shahzeen Z.; Carley, Sanya R.; Krause, Rachel M.; Warren, David C.; Rupp, John A.; Graham, John D.

    2013-12-03T23:59:59.000Z

    Whereas many studies focus on climate skeptics to explain the lack of support for immediate action on climate change, this research examines the effect of moderate believers in climate science. Using data from a representative survey of 832 Indiana...

  12. Deviance as an antecedent and consequence of early transitions to adulthood: mediating effects and moderating conditions

    E-Print Network [OSTI]

    Halim, Shaheen

    2005-08-29T23:59:59.000Z

    to examine whether the relationships observed for the full sample are moderated by gender, race/ethnicity, paternal level of education, and expectations for future failure in conventional adolescent roles. For the full sample, the simplified model produced...

  13. Moderators of the Safety Climate-Injury Relationship: A Meta-Analytic Examination

    E-Print Network [OSTI]

    Beus, Jeremy M.

    2010-07-14T23:59:59.000Z

    This study examined the variability in the observed relationship between safety climate and injuries in the extant literature by meta-analytically examining possible moderators of the safety climate-injury relationship at both the individual...

  14. Zoning and occupancy-moderation for residential space-conditioning under demand-driven electricity pricing

    E-Print Network [OSTI]

    Leow, Woei Ling, 1977-

    2012-01-01T23:59:59.000Z

    Occupancy-moderated zonal space-conditioning (OZS) refers to the partitioning of a residence into different zones and independently operating the space-conditioning equipment of each zone based on its occupancy. OZS remains ...

  15. The use of reduced-moderation light water reactors for transuranic isotope burning in thorium fuel

    E-Print Network [OSTI]

    Lindley, Benjamin A.

    2015-02-03T23:59:59.000Z

    THE USE OF REDUCED-MODERATION LIGHT WATER REACTORS FOR TRANSURANIC ISOTOPE BURNING IN THORIUM FUEL Benjamin Andrew Lindley St Catharine?s College Department of Engineering University of Cambridge A thesis... of Engineering as stated in the Memorandum to Graduate Students. Benjamin Andrew Lindley The Use of Reduced-moderation Light Water Reactors for Transuranic Isotope Burning in Thorium Fuel B. A. Lindley Light water reactors (LWRs) are the world...

  16. Analysis of the High-Resolution Infrared Spectrum of Cyclopropane...

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

    the High-Resolution Infrared Spectrum of Cyclopropane. Analysis of the High-Resolution Infrared Spectrum of Cyclopropane. Abstract: The high resolution infrared spectrum of...

  17. Keck High-Resolution Spectroscopy of Outflows in Infrared Luminous Galaxies

    E-Print Network [OSTI]

    David S. Rupke; Sylvain Veilleux

    2005-09-05T23:59:59.000Z

    Several recent studies have determined that large quantities of neutral gas are outflowing from the nuclei of almost all infrared-luminous galaxies. These measurements show that winds in infrared-luminous galaxies play a significant role in the evolution of galaxies and the intergalactic medium at redshifts z > 1, when infrared-luminous galaxies dominated the star formation rate of the universe. These conclusions rely on moderate resolution spectra (FWHM > 65 km/s) of the NaI D absorption line and the assumption that there are no unresolved, saturated velocity components. For the first time, we present high resolution spectra (FWHM = 13 km/s) of massive, infrared-luminous galaxies. The five galaxies in our sample are known to host outflows on the basis of previous observations. With the present observations, all NaI D velocity components are resolved with tau(NaI D1 5896 A) luminous galaxies have been measured correctly by previous studies.

  18. Ultra-High Resolution Electron Microscopy for Catalyst Characterizatio...

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

    Documents & Publications Ultra-High Resolution Electron Microscopy for Catalyst Characterization Ultra-high Resolution Electron Microscopy for Catalyst Characterization...

  19. Accuracy assessment of the MODIS 16-day albedo product for snow: comparisons with Greenland in situ measurements

    E-Print Network [OSTI]

    Kurapov, Alexander

    upon a surface. Snow and ice cover, with its high albedo, is a critical component of the global energy regions is available from the Advanced Very High Resolution Radiometer (AVHRR) Polar Pathfinder (APP) data-by-site basis using precise optical black radiometer data. Results indicate that the MOD43 albedo product

  20. Evaluating the impact of urban morphology configurations on the accuracy of urban canopy model temperature simulations with MODIS

    E-Print Network [OSTI]

    Monaghan, Andrew J.; Hu, Leiqiu; Brunsell, Nathaniel A.; Barlage, Michael; Wilhelmi, Olga V.

    2014-06-09T23:59:59.000Z

    of the urban-built environment within models. Using a 10 year (2003–2012) series of offline 1 km simulations over Greater Houston with the High-Resolution Land Data Assimilation System (HRLDAS), this study explores the model accuracy gained by progressively...

  1. Dispute Resolution Information | Department of Energy

    Office of Environmental Management (EM)

    Negotiation Center of Excellence (NCE) Department of the Navy ADR EEOC Federal Sector Alternative Dispute Resolution EEOC Laws, Regulations & Policy Guidance Federal Energy...

  2. The Environments of Low and High Luminosity Radio Galaxies at Moderate Redshifts

    E-Print Network [OSTI]

    M. W. Auger; R. H. Becker; C. D. Fassnacht

    2008-01-02T23:59:59.000Z

    In the local Universe, high-power radio galaxies live in lower density environments than low-luminosity radio galaxies. If this trend continues to higher redshifts, powerful radio galaxies would serve as efficient probes of moderate redshift groups and poor clusters. Photometric studies of radio galaxies at 0.3 environment correlation disappears at moderate redshifts, though this could be the result of foreground/background contamination affecting the photometric measures of environment. We have obtained multi-object spectroscopy of in the fields of 14 lower luminosity (L_1.4GHz 1.2x10^25 W/Hz) radio galaxies at z ~ 0.3 to spectroscopically investigate the link between the environment and the radio luminosity of radio galaxies at moderate redshifts. Our results support the photometric analyses; there does not appear to be a correlation between the luminosity of a radio galaxy and its environment at moderate redshifts. Hence, radio galaxies are not efficient signposts for group environments at moderate redshifts.

  3. A design study of VOR: a versatile optimal resolution chopper spectrometer for the ESS

    E-Print Network [OSTI]

    Deen, P P; Andersen, K H; Hall-Wilton, R

    2014-01-01T23:59:59.000Z

    VOR, the versatile optimal resolution chopper spectrometer, is designed to probe dynamic phenomena that are currently inaccessible for inelastic neutron scattering due to flux limitations. VOR is a short instrument by the standards of the European Spallation Source (ESS), 30.2 m moderator to sample, and provides instantaneous access to a broad dynamic range, 1 - 120 meV within each ESS period. The short instrument length combined with the long ESS pulse width enables a quadratic flux increase, even at longer wavelengths, by relaxing energy resolution from $\\Delta$E/E = 1% up to $\\Delta$E/E = 7%. This is impossible both on a long chopper spectrometer at the ESS and with instruments at short pulsed sources. In comparison to current day chopper spectrometers, VOR can offer an order of magnitude improvement in flux for equivalent energy resolutions, $\\Delta$E/E = 1-3%. Further relaxing the energy resolution enables VOR to gain an extra order of magnitude in flux. In addition, VOR has been optimised for repetition...

  4. RESOLUTION NO. 2011-26 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF BIGGS

    E-Print Network [OSTI]

    (,) c RESOLUTION NO. 2011-26 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF BIGGS ADOPTING A PROGRAM FOR ENFORCEMENT OF THE RENEWABLE PORTFOLIO STANDARDS PROGRAM BE IT RESOLVED BY THE CITY OF BIGGS

  5. High resolution scintillation detector with semiconductor readout

    DOE Patents [OSTI]

    Levin, Craig S. (Santa Monica, CA); Hoffman, Edward J. (Los Angeles, CA)

    2000-01-01T23:59:59.000Z

    A novel high resolution scintillation detector array for use in radiation imaging such as high resolution Positron Emission Tomography (PET) which comprises one or more parallelepiped crystals with at least one long surface of each crystal being in intimate contact with a semiconductor photodetector such that photons generated within each crystal by gamma radiation passing therethrough is detected by the photodetector paired therewith.

  6. Spatial resolution in vector potential photoelectron microscopy

    SciTech Connect (OSTI)

    Browning, R. [R. Browning Consultants, 1 Barnhart Place, Shoreham, New York 11786 (United States)] [R. Browning Consultants, 1 Barnhart Place, Shoreham, New York 11786 (United States)

    2014-03-15T23:59:59.000Z

    The experimental spatial resolution of vector potential photoelectron microscopy is found to be much higher than expected because of the cancellation of one of the expected contributions to the point spread function. We present a new calculation of the spatial resolution with support from finite element ray tracing, and experimental results.

  7. High resolution studies of massive primordial haloes

    E-Print Network [OSTI]

    Latif, M A; Schmidt, W; Niemeyer, J

    2012-01-01T23:59:59.000Z

    Atomic cooling haloes with T_vir > 10^4 K are the most plausible sites for the formation of the first galaxies. In this article, we aim to study the implications of gravity driven turbulence in protogalactic haloes. By varying the resolution per Jeans length, we explore whether the turbulent cascade is resolved well enough to obtain converged results. We have performed high resolution cosmological simulations using the adaptive mesh refinement code Enzo including a subgrid-scale turbulence model to study the role of unresolved turbulence. We compared the results of three different Jeans resolutions from 16 to 64 cells. While radially averaged profiles roughly agree at different resolutions, differences in the morphology reveal that even the highest resolution employed provides no convergence. Moreover, taking into account unresolved turbulence significantly influences the morphology of a halo. We have quantified the properties of the high-density clumps in the halo. These clumps are gravitationally unbound wi...

  8. Short term effects of moderate carbon prices on land use in the New Zealand emissions trading

    E-Print Network [OSTI]

    Silver, Whendee

    Short term effects of moderate carbon prices on land use in the New Zealand emissions trading Zealand Emissions Trading Scheme (NZ ETS) was introduced through the Climate Change Response Act............................................................................ 14 #12;1 1 Introduction The New Zealand Emissions Trading Scheme (NZ ETS) was legislated through

  9. Electrochemical studies of moderately boron doped polycrystalline diamond in non-aqueous solvent

    E-Print Network [OSTI]

    Bristol, University of

    Electrochemical studies of moderately boron doped polycrystalline diamond in non-aqueous solvent being marketed [83,84]. The first paper on the electrochemistry of boron doped polycrystalline diamond The electrochemistry of boron doped diamond is currently an active field of research. In the majority of studies

  10. Minimum mass of moderator required for criticality of homogeneous low-enriched uranium systems

    SciTech Connect (OSTI)

    Jordan, W.C.; Turner, J.C.

    1992-12-01T23:59:59.000Z

    A parametric calculational analysis has been performed in order to estimate the minimum mass of moderator required for criticality of homogeneous low-enriched uranium systems. The analysis was performed using a version of the SCALE-4.0 code system and the 27-group ENDF/B-IV cross-section library. Water-moderated uranyl fluoride (UO[sub 2]F[sub 2] and H[sub 2]O) and hydrofluoric-acid-moderated uranium hexaflouride (UF[sub 6] and HF) systems were considered in the analysis over enrichments of 1.4 to 5 wt % [sup 235]U. Estimates of the minimum critical volume, minimum critical mass of uranium, and the minimum mass of moderator required for criticality are presented. There was significant disagreement between the values generated in this study when compared with a similar undocumented study performed in 1983 using ANISN and the Knight-modified Hansen-Roach cross sections. An investigation into the cause of the disagreement was made, and the results are presented.

  11. Minimum mass of moderator required for criticality of homogeneous low-enriched uranium systems

    SciTech Connect (OSTI)

    Jordan, W.C.; Turner, J.C.

    1992-12-01T23:59:59.000Z

    A parametric calculational analysis has been performed in order to estimate the minimum mass of moderator required for criticality of homogeneous low-enriched uranium systems. The analysis was performed using a version of the SCALE-4.0 code system and the 27-group ENDF/B-IV cross-section library. Water-moderated uranyl fluoride (UO{sub 2}F{sub 2} and H{sub 2}O) and hydrofluoric-acid-moderated uranium hexaflouride (UF{sub 6} and HF) systems were considered in the analysis over enrichments of 1.4 to 5 wt % {sup 235}U. Estimates of the minimum critical volume, minimum critical mass of uranium, and the minimum mass of moderator required for criticality are presented. There was significant disagreement between the values generated in this study when compared with a similar undocumented study performed in 1983 using ANISN and the Knight-modified Hansen-Roach cross sections. An investigation into the cause of the disagreement was made, and the results are presented.

  12. METHANE AND n-BUTANE OXIDATION WITH CO2 UNDER RADIOFREQUENCY PLASMAS OF MODERATE PRESSURES (*)

    E-Print Network [OSTI]

    Boyer, Edmond

    the gas to the reactor walls. It is capacitively coupled to the radiofrequency generator (35 MHz, 10 k ) and constant pressure of 20 torr. Experimental details on discharges parameters, sampling procedure, gas analy1205 METHANE AND n-BUTANE OXIDATION WITH CO2 UNDER RADIOFREQUENCY PLASMAS OF MODERATE PRESSURES

  13. Proton scattering on carbon nuclei in bichromatic laser field at moderate energies

    E-Print Network [OSTI]

    I. F. Barna; S. Varró

    2015-06-05T23:59:59.000Z

    We present the general theory for proton nuclei scattering in a bichromatic laser field. As a physical example we consider proton collision on carbon twelve at 49 MeV/amu moderate energies in the field of a titan sapphire laser with its second harmonic.

  14. How moderate sea states can generate loud seismic noise in the deep ocean

    E-Print Network [OSTI]

    Stutzmann, Eléonore

    the signals recorded at coastal seismic stations. Our interpretation is based on the analysis of noiseHow moderate sea states can generate loud seismic noise in the deep ocean M. J. Obrebski,1 F from two distant storms can be a strong deep-water source of seismic noise, dominating temporarily

  15. Some insight on why Bam (Iran) was destroyed by an earthquake of relatively moderate size

    E-Print Network [OSTI]

    Hatzfeld, Denis

    Some insight on why Bam (Iran) was destroyed by an earthquake of relatively moderate size Michel March 2006; accepted 29 March 2006; published 13 May 2006. [1] The Bam (Iran) earthquake of 2003. Hatzfeld, J. A. Jackson, and E. Haghshenas (2006), Some insight on why Bam (Iran) was destroyed

  16. Probabilistic seismic risk analysis of existing buildings in regions with moderate seismicity

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Probabilistic seismic risk analysis of existing buildings in regions with moderate seismicity C to apply an approach based on risk for the seismic assessment of existing buildings. In this innovative analytical seismic assessment methods, as the ratio between the capacity and the requirement of the current

  17. Seismic evidence for a moderately thick lithosphere beneath the Siberian Platform

    E-Print Network [OSTI]

    Seismic evidence for a moderately thick lithosphere beneath the Siberian Platform Keith Priestley-wavespeed tomographic model for the upper mantle beneath the Siberian platform and surrounding region derived from lithosphere is $200 km thick beneath most of the Siberian platform but may extend to $250 km depth beneath

  18. Blind assessment of localisation microscope image resolution

    E-Print Network [OSTI]

    Rees, Eric J; Erdelyi, Miklos; Pinotsi, Dorothea; Knight, Alex; Metcalf, Daniel; Kaminski, Clemens F

    2012-12-10T23:59:59.000Z

    localisation precisions and densities. Methods By analysing localisation microscopy as a statistical method of Density Estimation, we present a method that produces a blind estimate of the resolution in a super-resolved image. This estimate is derived directly...

  19. A High-Resolution Global Climate Simulation

    SciTech Connect (OSTI)

    Duffy, P B

    2001-01-23T23:59:59.000Z

    A major factor limiting the quality and usefulness of global climate models is the coarse spatial resolution of these models. Global climate models today are typically run at resolutions of {approx}300 km (or even coarser) meaning that the smallest features represented are 300 km across. As Figure 1 shows, this resolution does not allow adequate representation of small or even large topographic features (e.g. the Sierra Nevada mountains). As a result of this and other problems, coarse-resolution global models do not come close to accurately simulating climate on regional spatial scales (e.g. within California). Results on continental and larger sales are much more realistic. An important consequence of this inability to simulate regional climate is that global climate model results cannot be used as the basis of assessments of potential societal impacts of climate change (e.g. effects on agriculture in the Central Valley, on management of water resources, etc.).

  20. Identifying chromatin interactions at high spatial resolution

    E-Print Network [OSTI]

    Reeder, Christopher Campbell

    2014-01-01T23:59:59.000Z

    This thesis presents two computational approaches for identifying chromatin interactions at high spatial resolution from ChIA-PET data. We introduce SPROUT which is a hierarchical probabilistic model that discovers high ...

  1. Atomic resolution images of graphite in air

    SciTech Connect (OSTI)

    Grigg, D.A.; Shedd, G.M.; Griffis, D.; Russell, P.E.

    1988-12-01T23:59:59.000Z

    One sample used for proof of operation for atomic resolution in STM is highly oriented pyrolytic graphite (HOPG). This sample has been imaged with many different STM`s obtaining similar results. Atomic resolution images of HOPG have now been obtained using an STM designed and built at the Precision Engineering Center. This paper discusses the theoretical predictions and experimental results obtained in imaging of HOPG.

  2. Development of a three resolution video encoder

    E-Print Network [OSTI]

    Sazzad, Sharif Mohammad

    1995-01-01T23:59:59.000Z

    DEVELOPMENT OF A THREE RESOLUTION VIDEO ENCODER A Thesis by SHARIF MOHAMMAD SAZZAD Submitted to the Office of Graduate Studies of Texas ASM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December... 1995 Major Subject: Electrical Engineering DEVELOPMENT OF A THREE RESOLUTION VIDEO ENCODER A Thesis by SHARIF MOHAMMAD SAZZAD Submitted to Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE...

  3. Policy on the Moderation of Assessment: Approved by the Senate, 22 May 2013 Heriot-Watt University

    E-Print Network [OSTI]

    Painter, Kevin

    1 Policy on the Moderation of Assessment: Approved by the Senate, 22 May 2013 Heriot-Watt University Policy on the Moderation of Assessment With diversity in form of assessment across multi in all disciplines, across all Schools and in all modes or locations of study. The University Policy

  4. Analysis of Rotational Structure in the High-Resolution Infrared...

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

    Rotational Structure in the High-Resolution Infrared Spectrum and Assignment of Vibrational Fundamentals of Analysis of Rotational Structure in the High-Resolution Infrared...

  5. Merging high resolution geophysical and geochemical surveys to...

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

    high resolution geophysical and geochemical surveys to reduce exploration risk at Glass Buttes, Oregon Merging high resolution geophysical and geochemical surveys to reduce...

  6. New generation NMR bioreactor coupled with high-resolution NMR...

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

    New generation NMR bioreactor coupled with high-resolution NMR spectroscopy leads to novel discoveries in Moorella New generation NMR bioreactor coupled with high-resolution NMR...

  7. Coherent Vibrational Dynamics and High-Resolution Nonlinear Spectrosco...

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

    Vibrational Dynamics and High-Resolution Nonlinear Spectroscopy: A Comparison with the AirDMSO Liquid Interface. Coherent Vibrational Dynamics and High-Resolution Nonlinear...

  8. Applications of High-Resolution Electrospray Ionization Mass...

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

    High-Resolution Electrospray Ionization Mass Spectrometry to Measurements of Average Oxygen to Carbon Ratios in Applications of High-Resolution Electrospray Ionization Mass...

  9. Super-Resolution Fluorescence Nanoscopy Applied to Image Core...

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

    Super-Resolution Fluorescence Nanoscopy Applied to Image Core-Shell Photoswitching Nanoparticles and their Self-Assemblies . Super-Resolution Fluorescence Nanoscopy Applied to...

  10. Sandia Energy - High-Resolution Computational Algorithms for...

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

    High-Resolution Computational Algorithms for Simulating Offshore Wind Farms Home Stationary Power Energy Conversion Efficiency Wind Energy Offshore Wind High-Resolution...

  11. Supercomputers Fuel Global High-Resolution Climate Models

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

    Supercomputers Fuel Global High-Resolution Climate Models Supercomputers Fuel Global High-Resolution Climate Models Berkeley Lab Researcher Says Climate Science is Entering New...

  12. Ultra-high Resolution Electron Microscopy for Catalyst Characterizatio...

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

    high Resolution Electron Microscopy for Catalyst Characterization Ultra-high Resolution Electron Microscopy for Catalyst Characterization 2009 DOE Hydrogen Program and Vehicle...

  13. Ultra-High Resolution Electron Microscopy for Catalyst Characterizatio...

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

    Documents & Publications Ultra-High Resolution Electron Microscopy for Catalyst Characterization Ultra-high Resolution Electron Microscopy for Catalyst Characterization Catalyst...

  14. High Resolution and Low-Temperature Photoelectron Spectroscopy...

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

    High Resolution and Low-Temperature Photoelectron Spectroscopy of an Oxygen-Linked Fullerene Dimer Dianion: C120O2-. High Resolution and Low-Temperature Photoelectron Spectroscopy...

  15. High-Resolution PET Detector. Final report

    SciTech Connect (OSTI)

    Karp, Joel

    2014-03-26T23:59:59.000Z

    The objective of this project was to develop an understanding of the limits of performance for a high resolution PET detector using an approach based on continuous scintillation crystals rather than pixelated crystals. The overall goal was to design a high-resolution detector, which requires both high spatial resolution and high sensitivity for 511 keV gammas. Continuous scintillation detectors (Anger cameras) have been used extensively for both single-photon and PET scanners, however, these instruments were based on NaI(Tl) scintillators using relatively large, individual photo-multipliers. In this project we investigated the potential of this type of detector technology to achieve higher spatial resolution through the use of improved scintillator materials and photo-sensors, and modification of the detector surface to optimize the light response function.We achieved an average spatial resolution of 3-mm for a 25-mm thick, LYSO continuous detector using a maximum likelihood position algorithm and shallow slots cut into the entrance surface.

  16. HIGH RESOLUTION SCANNING AUGER MICROANALYSIS OF HIGH-STRENGTH SILICON CARBIDES

    E-Print Network [OSTI]

    Krivanek, O.L.

    2012-01-01T23:59:59.000Z

    Society HIGH RESOLUTION SCANNING AUGER MICROANALYSIS OFCalifornia. HIGH RESOLUTION SCANNING AUGER MICROANALYSIS OFhelium, by high resolution scanning Auger microanalysis and

  17. EMPLOYMENT PROBLEMS: INFORMAL RESOLUTION AND GRIEVANCE 7.01 Informal Resolution

    E-Print Network [OSTI]

    Sheridan, Jennifer

    CHAPTER 7 EMPLOYMENT PROBLEMS: INFORMAL RESOLUTION AND GRIEVANCE PROCEDURES 7.01 Informal Resolution An academic staff member who has an employment problem that may lead to the grievance procedure the employing unit or needs information about the process to resolve employment problems. The academic staff

  18. High resolution A/D conversion based on piecewise conversion at lower resolution

    SciTech Connect (OSTI)

    Terwilliger, Steve (Albuquerque, NM)

    2012-06-05T23:59:59.000Z

    Piecewise conversion of an analog input signal is performed utilizing a plurality of relatively lower bit resolution A/D conversions. The results of this piecewise conversion are interpreted to achieve a relatively higher bit resolution A/D conversion without sampling frequency penalty.

  19. Learning Structured Perceptrons for Coreference Resolution

    E-Print Network [OSTI]

    Reyle, Uwe

    Conclusion 2 #12;Title Breakdown Learning Structured Perceptrons for Coreference Resolution with Latent president and chief operating officer, succeeding [Gary Wilber]. 3 #12;Title Breakdown Learning Structured president and chief operating officer, succeeding [Gary Wilber]. 3 #12;Title Breakdown Learning Structured

  20. SHIP3QARD ORGANIC GEOCHEMISTRY JOIDES RESOLUTION

    E-Print Network [OSTI]

    with the National Science Foundation. Funding for the program is provided by the following agencies: DepartmentSHIP3QARD ORGANIC GEOCHEMISTRY ON JOIDES RESOLUTION Kay-Christian Bneis Ocean Drilling Program 345 Middlefield Road Menlo Park, CA 94025 OCEAN DRILLING PROGRAM TEXAS A&MUNIVERSITY TECHNICAL NOTE

  1. Investigating the possibilities of energy balance modelling with more moderate input data. Development and testing, Griesgletscher, Switzerland 

    E-Print Network [OSTI]

    Thompson, Sarah

    A distributed surface energy balance model has been developed to simulate mass balance at an hourly resolution. The model is applied to a 25 m resolution digital elevation model of a valley glacier in Switzerland. The three main energy balance...

  2. Moderate forest disturbance as a stringent test for gap and big-leaf models

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

    Bond-Lamberty, Benjamin; Fisk, Justin P.; Holm, Jennifer; Bailey, Vanessa L.; Bohrer, Gil; Gough, Christopher

    2015-01-01T23:59:59.000Z

    Disturbance-induced tree mortality is a key factor regulating the carbon balance of a forest, but tree mortality and its subsequent effects are poorly represented processes in terrestrial ecosystem models. It is thus unclear whether models can robustly simulate moderate (non-catastrophic) disturbances, which tend to increase biological and structural complexity and are increasingly common in aging US forests. We tested whether three forest ecosystem models – Biome-BGC (BioGeochemical Cycles), a classic big-leaf model, and the ZELIG and ED (Ecosystem Demography) gap-oriented models – could reproduce the resilience to moderate disturbance observed in an experimentally manipulated forest (the Forest Accelerated Succession Experimentmore »in northern Michigan, USA, in which 38% of canopy dominants were stem girdled and compared to control plots). Each model was parameterized, spun up, and disturbed following similar protocols and run for 5 years post-disturbance. The models replicated observed declines in aboveground biomass well. Biome-BGC captured the timing and rebound of observed leaf area index (LAI), while ZELIG and ED correctly estimated the magnitude of LAI decline. None of the models fully captured the observed post-disturbance C fluxes, in particular gross primary production or net primary production (NPP). Biome-BGC NPP was correctly resilient but for the wrong reasons, and could not match the absolute observational values. ZELIG and ED, in contrast, exhibited large, unobserved drops in NPP and net ecosystem production. The biological mechanisms proposed to explain the observed rapid resilience of the C cycle are typically not incorporated by these or other models. It is thus an open question whether most ecosystem models will simulate correctly the gradual and less extensive tree mortality characteristic of moderate disturbances.« less

  3. Case studies of low-to-moderate temperature hydrothermal energy development

    SciTech Connect (OSTI)

    Not Available

    1981-10-01T23:59:59.000Z

    Six development projects are examined that use low- (less than 90/sup 0/C (194/sup 0/F)) to-moderate (90 to 150/sup 0/C (194 to 302/sup 0/F)) temperature geothermal resources. These projects were selected from 22 government cost-shared projects to illustrate the many facets of hydrothermal development. The case studies describe the history of this development, its exploratory methods, and its resource definition, as well as address legal, environmental, and institutional constraints. A critique of procedures used in the development is also provided and recommendations for similar future hydrothermal projects are suggested.

  4. Electrokinetic removal of charged contaminant species from soil and other media using moderately conductive adsorptive materials

    DOE Patents [OSTI]

    Lindgren, Eric R. (Albuquerque, NM); Mattson, Earl D. (Idaho Falls, ID)

    2001-01-01T23:59:59.000Z

    Method for collecting and concentrating charged species, specifically, contaminant species in a medium, preferably soil. The method utilizes electrokinesis to drive contaminant species into and through a bed adjacent to a drive electrode. The bed comprises a moderately electrically conductive adsorbent material which is porous and is infused with water or other solvent capable of conducting electrical current. The bed material, preferably activated carbon, is easily removed and disposed of. Preferably, where activated carbon is used, after contaminant species are collected and concentrated, the mixture of activated carbon and contaminant species is removed and burned to form a stable and easily disposable waste product.

  5. Hungry for Respect: The Moderating Roles of Status and Justice Orientation on Relationships between Interpersonal Justice and Emotions

    E-Print Network [OSTI]

    Stoverink, Adam C

    2013-07-31T23:59:59.000Z

    ?s self-concept (Bies, 2001; Tyler & Lind, 1992), and self-enhancing events have been linked to positive affective responses (Kwang & Swann, 2010). It is therefore likely that interpersonal justice will also influence positive emotions. Accordingly, I..., Kraimer, & Liden, 2001), an outcome of fairness (Lind & Tyler, 1988), and a moderator of fairness effects (Diekmann, Sondak, & Bearsness, 2007). Scholars have specifically found that status moderates the effects of interpersonal justice. A study...

  6. Standard Practice for Design of Surveillance Programs for Light-Water Moderated Nuclear Power Reactor Vessels

    E-Print Network [OSTI]

    American Society for Testing and Materials. Philadelphia

    2010-01-01T23:59:59.000Z

    1.1 This practice covers procedures for designing a surveillance program for monitoring the radiation-induced changes in the mechanical properties of ferritic materials in light-water moderated nuclear power reactor vessels. This practice includes the minimum requirements for the design of a surveillance program, selection of vessel material to be included, and the initial schedule for evaluation of materials. 1.2 This practice was developed for all light-water moderated nuclear power reactor vessels for which the predicted maximum fast neutron fluence (E > 1 MeV) at the end of license (EOL) exceeds 1 × 1021 neutrons/m2 (1 × 1017 n/cm2) at the inside surface of the reactor vessel. 1.3 This practice applies only to the planning and design of surveillance programs for reactor vessels designed and built after the effective date of this practice. Previous versions of Practice E185 apply to earlier reactor vessels. 1.4 This practice does not provide specific procedures for monitoring the radiation induced cha...

  7. Method and apparatus for determination of temperature, neutron absorption cross section and neutron moderating power

    DOE Patents [OSTI]

    Vagelatos, Nicholas (San Diego, CA); Steinman, Donald K. (San Diego, CA); John, Joseph (San Diego, CA); Young, Jack C. (Escondido, CA)

    1981-01-01T23:59:59.000Z

    A nuclear method and apparatus determines the temperature of a medium by injecting fast neutrons into the medium and detecting returning slow neutrons in three first energy ranges by producing three respective detection signals. The detection signals are combined to produce three derived indicia each systematically related to the population of slow neutrons returning from the medium in a respective one of three second energy ranges, specifically exclusively epithermal neutrons, exclusively substantially all thermal neutrons and exclusively a portion of the thermal neutron spectrum. The derived indicia are compared with calibration indicia similarly systematically related to the population of slow neutrons in the same three second energy ranges returning from similarly irradiated calibration media for which the relationships temperature, neutron absorption cross section and neutron moderating power to such calibration indicia are known. The comparison indicates the temperature at which the calibration indicia correspond to the derived indicia and consequently the temperature of the medium. The neutron absorption cross section and moderating power of the medium can be identified at the same time.

  8. Exhibit G Off-site Moderate Risk Cloud Computing Services (Rev 0, 2/27/2014) P.R. No. * Date*

    E-Print Network [OSTI]

    Exhibit G Off-site Moderate Risk Cloud Computing Services (Rev 0, 2/27/2014) P.R. No. * Date* Subcontract No. or PO No. * 1 EXHIBIT G OFF-SITE MODERATE RISK CLOUD COMPUTING SERVICES SECURITY REQUIREMENTS Clauses Incorporated By Reference #12;Exhibit G Off-site Moderate Risk Cloud Computing Services (Rev 0, 2

  9. Energy Resolution with the Lorentz integral transform

    E-Print Network [OSTI]

    Winfried Leidemann

    2015-03-24T23:59:59.000Z

    A brief outline of the Lorentz Integral Transform (LIT) method is given. The method is well established and allows to treat reactions into the many-body continuum with bound-state like techniques. The energy resolution that can be achieved is studied by means of a simple two-body reaction. From the discussion it will become clear that the LIT method is an approach with a controlled resolution and that there is no principle problem to even resolve narrow resonances in the many-body continuum. As an example the isoscalar monopole resonance of 4He is considered. The importance of the choice of a proper basis for the expansion of the LIT states is pointed out. Employing such a basis a width of 180(70) keV is found for the 4He isoscalar monopole resonance when using a simple central nucleon-nucleon potential model.

  10. High resolution patterning of silica aerogels

    SciTech Connect (OSTI)

    Bertino, M.F.; Hund, J.F.; Sosa, J.; Zhang, G.; Sotiriou-Leventis, C.; Leventis, N.; Tokuhiro, A.T.; Terry, J. (UMR-MUST); (IIT)

    2008-10-30T23:59:59.000Z

    Three-dimensional metallic structures are fabricated with high spatial resolution in silica aerogels. In our method, silica hydrogels are prepared with a standard base-catalyzed route, and exchanged with an aqueous solution typically containing Ag{sup +} ions (1 M) and 2-propanol (0.2 M). The metal ions are reduced photolytically with a table-top ultraviolet lamp, or radiolytically, with a focused X-ray beam. We fabricated dots and lines as small as 30 x 70 {micro}m, protruding for several mm into the bulk of the materials. The hydrogels are eventually supercritically dried to yield aerogels, without any measurable change in the shape and spatial resolution of the lithographed structures. Transmission electron microscopy shows that illuminated regions are composed by Ag clusters with a size of several {micro}m, separated by thin layers of silica.

  11. Distributed Local Resolution of Boolean Equation Systems

    E-Print Network [OSTI]

    Joseph Fourier Grenoble-I, Université

    Resolution x3 µ = x2 x5 x6 x1 µ = x2 x3 x2 µ = x4 x5 x4 µ = x4 x5 x5 µ = T x6 µ = x3 x1 BES {xi = opi- sociated to a BES V = {x1, ..., xn} E = {(xi , xj )|xj Xi } L : V {, }, L(xi ) = opi C. Joubert, R

  12. ITER TCWS Conceptual Design Chit Resolution Report

    SciTech Connect (OSTI)

    Berry, Jan [ORNL

    2012-02-01T23:59:59.000Z

    Design Chits resulted from the External Conceptual Design Review (CDR) held at Cadarache on July 21-23, 2009 (Reference [5.1.3]). Those Chits were categorized into 3 categories in accordance with the following rules: Category 1 - Chits to be resolved before proceeding with preliminary design; Category 2 - Chits to be resolved during preliminary design; and Category 3 - Chits already resolved or covered by higher category Chits such that no further action is required. Prior to the preliminary design, all the category 1 chits were resolved and the category chit 1 resolution report was approved (Reference [5.1.4]). However, as the design has been evolving, one of the category 1 chits needs to be re-addressed. The purpose of this report is to present the resolutions to one CDR Category 1 Chit (Cat 1 Chit No.5) and twenty-three CDR Category 2 Chits. The Category 2 Chit resolutions presented are listed in order from item number one to item number twenty-three.

  13. Performance of a Nanometer Resolution BPM System

    SciTech Connect (OSTI)

    Vogel, V; Hayano, H; Honda, Y; Terunuma, N; Urakawa, J; Kolomensky, Y; Orimoto, T; Chung, C; Fitsos, P; Gronberg, J; Walston, S; White, G; Frisch, J; May, J; McCormick, D; Ross, M; Smith, S; Smith, T; Slater, M; Ward, D; Boogert, S; Lyapin, A; Malton, S; Miller, D

    2005-10-14T23:59:59.000Z

    International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. it is important to the ongoing ILC design effort to demonstrate that these tolerances can be achieved--ideally using beam-based stability measurements. It has been estimated that an RF cavity BPM with modern waveform processing could provide a position measurement resolution of less than one nanometer. Such a system could form the basis of the desired beam-based stability measurement, as well as be used for other specialized purposes. They have developed a high resolution RF cavity BPM and associated electronics. A triplet comprised of these BPMs has been installed in the extraction line of the KEK Accelerator Test Facility (ATF) for testing with its ultra-low emittance beam. The three BPMs are rigidly mounted inside an alignment frame on six variable-length struts which can be used to move the BPMs in position and angle. they have developed novel methods for extracting the position and tilt information from the BPM signals including a robust calibration algorithm which is immune to beam jitter. To date, they have been able to demonstrate a resolution of approximately 20 nm over a dynamic range of {+-} 20 {micro}m. They report on the progress of these ongoing tests.

  14. Performance of a Nanometer Resolution BPM System

    SciTech Connect (OSTI)

    Walston, S.; Chung, C.; Fitsos, P.; Gronberg, J.; /LLNL, Livermore; Meller, R.; /Cornell U., LEPP; Vogel, V.; /DESY; Hayano, H.; Honda, Y.; Terunuma, N.; Urakawa, J.; /KEK,; Kolomensky, Y.; Orimoto, T.; /LBL, Berkeley; Boogert, S.; /Royal Holloway, U. of London; Frisch, J.; May, J.; McCormick, D.; Ross, M.; Smith, S.; Smith, T.; White, G.; /Oxford U. /SLAC; Slater, M.; /Cambridge U. /University Coll. London

    2007-04-24T23:59:59.000Z

    International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. It is important to the ILC design effort to demonstrate that these tolerances can be achieved ideally using beam-based stability measurements. It has been estimated that RF cavity beam position monitors (BPMs) could provide position measurement resolutions of less than one nanometer and could form the basis of the desired beam-based stability measurement. We have developed a high resolution RF cavity BPM system. A triplet of these BPMs has been installed in the extraction line of the KEK Accelerator Test Facility (ATF) for testing with its ultra-low emittance beam. The three BPMs are rigidly mounted inside an alignment frame on variable-length struts which allow movement in position and angle. We have developed novel methods for extracting the position and tilt information from the BPM signals including a calibration algorithm which is immune to beam jitter. To date, we have been able to demonstrate a resolution of approximately 20 nm over a dynamic range of +/- 20 microns. We report on the progress of these ongoing tests.

  15. PERFORMANCE OF A NANOMETER RESOLUTION BPM SYSTEM

    SciTech Connect (OSTI)

    Walston, S; Chung, C; Fitsos, P; Gronberg, J; Meller, R; Vogel, V; Hayano, H; Honda, Y; Terunuma, N; Urakawa, J; Kolomensky, Y; Orimoto, T; Boogert, S; Frisch, J; May, J; McCormick, D; Ross, M; Smith, S; Smith, T; Slater, M; Thomson, M; Ward, D; Lyapin, A; Malton, S; Miller, D; White, G

    2006-06-21T23:59:59.000Z

    International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. It is important to the ILC design effort to demonstrate that these tolerances can be achieved--ideally using beam-based stability measurements. It has been estimated that RF cavity beam position monitors (BPMs) could provide position measurement resolutions of less than one nanometer and could form the basis of the desired beam-based stability measurement. We have developed a high resolution RF cavity BPM system. A triplet of these BPMs has been installed in the extraction line of the KEK Accelerator Test Facility (ATF) for testing with its ultra-low emittance beam. The three BPMs are rigidly mounted inside an alignment frame on variable-length struts which allow movement in position and angle. We have developed novel methods for extracting the position and tilt information from the BPM signals including a calibration algorithm which is immune to beam jitter. To date, we have been able to demonstrate a resolution of approximately 20 nm over a dynamic range of +/- 20 microns. We report on the progress of these ongoing tests.

  16. Isotope specific resolution recovery image reconstruction in high resolution PET imaging

    SciTech Connect (OSTI)

    Kotasidis, Fotis A. [Division of Nuclear Medicine and Molecular Imaging, Geneva University Hospital, CH-1211 Geneva, Switzerland and Wolfson Molecular Imaging Centre, MAHSC, University of Manchester, M20 3LJ, Manchester (United Kingdom)] [Division of Nuclear Medicine and Molecular Imaging, Geneva University Hospital, CH-1211 Geneva, Switzerland and Wolfson Molecular Imaging Centre, MAHSC, University of Manchester, M20 3LJ, Manchester (United Kingdom); Angelis, Georgios I. [Faculty of Health Sciences, Brain and Mind Research Institute, University of Sydney, NSW 2006, Sydney (Australia)] [Faculty of Health Sciences, Brain and Mind Research Institute, University of Sydney, NSW 2006, Sydney (Australia); Anton-Rodriguez, Jose; Matthews, Julian C. [Wolfson Molecular Imaging Centre, MAHSC, University of Manchester, Manchester M20 3LJ (United Kingdom)] [Wolfson Molecular Imaging Centre, MAHSC, University of Manchester, Manchester M20 3LJ (United Kingdom); Reader, Andrew J. [Montreal Neurological Institute, McGill University, Montreal QC H3A 2B4, Canada and Department of Biomedical Engineering, Division of Imaging Sciences and Biomedical Engineering, King's College London, St. Thomas’ Hospital, London SE1 7EH (United Kingdom)] [Montreal Neurological Institute, McGill University, Montreal QC H3A 2B4, Canada and Department of Biomedical Engineering, Division of Imaging Sciences and Biomedical Engineering, King's College London, St. Thomas’ Hospital, London SE1 7EH (United Kingdom); Zaidi, Habib [Division of Nuclear Medicine and Molecular Imaging, Geneva University Hospital, CH-1211 Geneva (Switzerland) [Division of Nuclear Medicine and Molecular Imaging, Geneva University Hospital, CH-1211 Geneva (Switzerland); Geneva Neuroscience Centre, Geneva University, CH-1205 Geneva (Switzerland); Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, PO Box 30 001, Groningen 9700 RB (Netherlands)

    2014-05-15T23:59:59.000Z

    Purpose: Measuring and incorporating a scanner-specific point spread function (PSF) within image reconstruction has been shown to improve spatial resolution in PET. However, due to the short half-life of clinically used isotopes, other long-lived isotopes not used in clinical practice are used to perform the PSF measurements. As such, non-optimal PSF models that do not correspond to those needed for the data to be reconstructed are used within resolution modeling (RM) image reconstruction, usually underestimating the true PSF owing to the difference in positron range. In high resolution brain and preclinical imaging, this effect is of particular importance since the PSFs become more positron range limited and isotope-specific PSFs can help maximize the performance benefit from using resolution recovery image reconstruction algorithms. Methods: In this work, the authors used a printing technique to simultaneously measure multiple point sources on the High Resolution Research Tomograph (HRRT), and the authors demonstrated the feasibility of deriving isotope-dependent system matrices from fluorine-18 and carbon-11 point sources. Furthermore, the authors evaluated the impact of incorporating them within RM image reconstruction, using carbon-11 phantom and clinical datasets on the HRRT. Results: The results obtained using these two isotopes illustrate that even small differences in positron range can result in different PSF maps, leading to further improvements in contrast recovery when used in image reconstruction. The difference is more pronounced in the centre of the field-of-view where the full width at half maximum (FWHM) from the positron range has a larger contribution to the overall FWHM compared to the edge where the parallax error dominates the overall FWHM. Conclusions: Based on the proposed methodology, measured isotope-specific and spatially variant PSFs can be reliably derived and used for improved spatial resolution and variance performance in resolution recovery image reconstruction. The benefits are expected to be more substantial for more energetic positron emitting isotopes such as Oxygen-15 and Rubidium-82.

  17. Microsoft PowerPoint - bpm camera resolution measurements.ppt

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

    per mm Resolution edge 46x55 micronpix 11 lines per mm 213 34x26.5 mm 195 mm Pixel Calibration Resolution Center Relative intensity Field of view Work Dist Zoom lens with 15 mm...

  18. Earthquake Damage Identification using High-Resolution Satellite

    E-Print Network [OSTI]

    Shinozuka, Masanobu

    Earthquake Damage Identification using High-Resolution Satellite Images from the 2003 Northern & evaluation · High-resolution satellite imagery · Images from Boumerdes, Algeria · Semi-automated damage are most damaged? ­ Effects in less populated areas · Earthquake reconnaissance time wasted "looking

  19. Pseudoscalar bosonic excitations in the color-flavor locked phase at moderate densities

    E-Print Network [OSTI]

    Verena Kleinhaus; Michael Buballa

    2008-08-26T23:59:59.000Z

    The properties of pseudoscalar bosonic excitations in the color-flavor locked phase at moderate densities are studied within a model of the Nambu--Jona-Lasinio type. Our previous analysis is extended to Goldstone bosons with hidden flavor and to higher-lying modes which stay massive in the chiral limit. The bosons are constructed explicitly by solving the Bethe-Salpeter equation for quark-quark scattering in random phase approximation. The masses and weak decay constants of the Goldstone bosons are found in good agreement with predictions from the low-energy effective theory. In the non-Goldstone sector we find an SU(3) octet which is weakly bound, while the singlet appears to be unbound.

  20. Pseudoscalar bosonic excitations in the color-flavor locked phase at moderate densities

    E-Print Network [OSTI]

    Kleinhaus, Verena

    2008-01-01T23:59:59.000Z

    The properties of pseudoscalar bosonic excitations in the color-flavor locked phase at moderate densities are studied within a model of the Nambu--Jona-Lasinio type. Our previous analysis is extended to Goldstone bosons with hidden flavor and to higher-lying modes which stay massive in the chiral limit. The bosons are constructed explicitly by solving the Bethe-Salpeter equation for quark-quark scattering in random phase approximation. The masses and weak decay constants of the Goldstone bosons are found in good agreement with predictions from the low-energy effective theory. In the non-Goldstone sector we find an SU(3) octet which is weakly bound, while the singlet appears to be unbound.

  1. Standard Guide for In-Service Annealing of Light-Water Moderated Nuclear Reactor Vessels

    E-Print Network [OSTI]

    American Society for Testing and Materials. Philadelphia

    2003-01-01T23:59:59.000Z

    1.1 This guide covers the general procedures to be considered for conducting an in-service thermal anneal of a light-water moderated nuclear reactor vessel and demonstrating the effectiveness of the procedure. The purpose of this in-service annealing (heat treatment) is to improve the mechanical properties, especially fracture toughness, of the reactor vessel materials previously degraded by neutron embrittlement. The improvement in mechanical properties generally is assessed using Charpy V-notch impact test results, or alternatively, fracture toughness test results or inferred toughness property changes from tensile, hardness, indentation, or other miniature specimen testing (1). 1.2 This guide is designed to accommodate the variable response of reactor-vessel materials in post-irradiation annealing at various temperatures and different time periods. Certain inherent limiting factors must be considered in developing an annealing procedure. These factors include system-design limitations; physical constrain...

  2. Solution of the Kramers' problem about isothermal sliding of moderately dense gas with accomodation boundary conditions

    E-Print Network [OSTI]

    A. V. Latyshev; A. D. Kurilov

    2014-12-30T23:59:59.000Z

    Half-space boundary Kramers' problem about isothermal sliding of moderate dense gas with accomodation boundary conditions along a flat firm surface is solving. The new method of the solution of boundary problems of the kinetic theory is applied (see JVMMF, 2012, 52:3, 539-552). The method allows to receive the solution with arbitrary degree of accuracy. The idea of representation of boundary condition on distribution function in the form of source in the kinetic equation serves as the basis for the method mentioned above. By means of Fourier integrals the kinetic equation with a source comes to the Fredholm integral equation of the second kind. The solution has been received in the form of Neumann's number.

  3. Communication: Spectroscopic phase and lineshapes in high-resolution...

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

    Communication: Spectroscopic phase and lineshapes in high-resolution broadband sum frequency vibrational spectroscopy: Resolving Communication: Spectroscopic phase and lineshapes...

  4. RESEARCH ARTICLE High-resolution climate change mapping with gridded

    E-Print Network [OSTI]

    Vermont, University of

    RESEARCH ARTICLE High-resolution climate change mapping with gridded historical climate products of climate research and adaptation efforts around the world. High-resolution gridded historical climate (GHC products to produce high-resolution temperature trend maps for the US Northeast from 1980 to 2009

  5. The Neutron Energy Spectrum Study from the Phase II Solid Methane Moderator at the LENS Neutron Source

    E-Print Network [OSTI]

    Yunchang Shin; W. Mike Snow; Christopher M. Lavelle; David V. Baxter; Xin Tong; Haiyang Yan; Mark Leuschner

    2007-11-19T23:59:59.000Z

    Neutron energy spectrum measurements from a solid methane moderator were performed at the Low Energy Neutron Source (LENS) at Indiana University Cyclotron Facility (IUCF) to verify our neutron scattering model of solid methane. The time-of-flight method was used to measure the energy spectrum of the moderator in the energy range of 0.1$meV\\sim$ 1$eV$. Neutrons were counted with a high efficiency $^{3}{He}$ detector. The solid methane moderator was operated in phase II temperature and the energy spectra were measured at the temperatures of 20K and 4K. We have also tested our newly-developed scattering kernels for phase II solid methane by calculating the neutron spectral intensity expected from the methane moderator at the LENS neutron source using MCNP (Monte Carlo N-particle Transport Code). Within the expected accuracy of our approximate approach, our model predicts both the neutron spectral intensity and the optimal thickness of the moderator at both temperatures. The predictions are compared to the measured energy spectra. The simulations agree with the measurement data at both temperatures.

  6. Image Resolution in Scanning Transmission Electron Microscopy

    SciTech Connect (OSTI)

    Pennycook, S. J.; Lupini, A.R.

    2008-06-26T23:59:59.000Z

    Digital images captured with electron microscopes are corrupted by two fundamental effects: shot noise resulting from electron counting statistics and blur resulting from the nonzero width of the focused electron beam. The generic problem of computationally undoing these effects is called image reconstruction and for decades has proved to be one of the most challenging and important problems in imaging science. This proposal concerned the application of the Pixon method, the highest-performance image-reconstruction algorithm yet devised, to the enhancement of images obtained from the highest-resolution electron microscopes in the world, now in operation at Oak Ridge National Laboratory.

  7. Alternative Dispute Resolution | Department of Energy

    Energy Savers [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 directed off Energy.gov. Are you0 ARRA Newsletters 20103-03EnergyAlternative Dispute Resolution

  8. Age-dating the Tully-Fisher relation at moderate redshift

    E-Print Network [OSTI]

    Ferreras, Ignacio; Ziegler, Bodo; Silk, Joseph

    2013-01-01T23:59:59.000Z

    We analyse the Tully-Fisher relation at moderate redshift from the point of view of the underlying stellar populations, by comparing optical and NIR photometry with a phenomenological model that combines population synthesis with a simple prescription for chemical enrichment. The sample comprises 108 late-type galaxies extracted from the FORS Deep Field (FDF) and William Herschel Deep Field (WHDF) surveys at z<1 (median redshift z=0.45). A strong correlation is found between stellar mass and the parameters that describe the star formation history, with massive galaxies forming their populations early (zFOR~3), with star formation timescales, tau1~4 Gyr; although with very efficient chemical enrichment timescales (tau2~1 Gyr). In contrast, the stellar-to-dynamical mass ratio which, in principle, would track the efficiency of feedback in the baryonic processes driving galaxy formation - does not correlate strongly with the model parameters. On the Tully-Fisher plane, no significant age segregation is found a...

  9. Multiplier, moderator, and reflector materials for lithium-vanadium fusion blankets.

    SciTech Connect (OSTI)

    Gohar, Y.; Smith, D. L.

    1999-10-07T23:59:59.000Z

    The self-cooled lithium-vanadium fusion blanket concept has several attractive operational and environmental features. In this concept, liquid lithium works as the tritium breeder and coolant to alleviate issues of coolant breeder compatibility and reactivity. Vanadium alloy (V-4Cr-4Ti) is used as the structural material because of its superior performance relative to other alloys for this application. However, this concept has poor attenuation characteristics and energy multiplication for the DT neutrons. An advanced self-cooled lithium-vanadium fusion blanket concept has been developed to eliminate these drawbacks while maintaining all the attractive features of the conventional concept. An electrical insulator coating for the coolant channels, spectral shifter (multiplier, and moderator) and reflector were utilized in the blanket design to enhance the blanket performance. In addition, the blanket was designed to have the capability to operate at high loading conditions of 2 MW/m{sup 2} surface heat flux and 10 MW/m{sup 2} neutron wall loading. This paper assesses the spectral shifter and the reflector materials and it defines the technological requirements of this advanced blanket concept.

  10. Development of Probabilistic Design Basis Earthquake (DBE) Parameters for Moderate and High Hazard Facilities at INEEL

    SciTech Connect (OSTI)

    S. M. Payne; V. W. Gorman; S. A. Jensen; M. E. Nitzel; M. J. Russell; R. P. Smith

    2000-03-01T23:59:59.000Z

    Design Basis Earthquake (DBE) horizontal and vertical response spectra are developed for moderate and high hazard facilities or Performance Categories (PC) 3 and 4, respectively, at the Idaho National Engineering and Environmental Laboratory (INEEL). The probabilistic DBE response spectra will replace the deterministic DBE response spectra currently in the U.S. Department of Energy Idaho Operations Office (DOE-ID) Architectural Engineering Standards that govern seismic design criteria for several facility areas at the INEEL. Probabilistic DBE response spectra are recommended to DOE Naval Reactors for use at the Naval Reactor Facility at INEEL. The site-specific Uniform Hazard Spectra (UHS) developed by URS Greiner Woodward Clyde Federal Services are used as the basis for developing the DBE response spectra. In 1999, the UHS for all INEEL facility areas were recomputed using more appropriate attenuation relationships for the Basin and Range province. The revised UHS have lower ground motions than those produced in the 1996 INEEL site-wide probabilistic ground motion study. The DBE response spectra were developed by incorporating smoothed broadened regions of the peak accelerations, velocities, and displacements defined by the site-specific UHS. Portions of the DBE response spectra were adjusted to ensure conservatism for the structural design process.

  11. Brazil-nut effect versus reverse Brazil-nut effect in a moderately dense granular fluid

    E-Print Network [OSTI]

    Vicente Garzo

    2008-09-03T23:59:59.000Z

    A new segregation criterion based on the inelastic Enskog kinetic equation is derived to show the transition between the Brazil-nut effect (BNE) and the reverse Brazil-nut effect (RBNE) by varying the different parameters of the system. In contrast to previous theoretical attempts the approach is not limited to the near-elastic case, takes into account the influence of both thermal gradients and gravity and applies for moderate densities. The form of the phase-diagrams for the BNE/RBNE transition depends sensitively on the value of gravity relative to the thermal gradient, so that it is possible to switch between both states for given values of the mass and size ratios, the coefficients of restitution and the solid volume fraction. In particular, the influence of collisional dissipation on segregation becomes more important when the thermal gradient dominates over gravity than in the opposite limit. The present analysis extends previous results derived in the dilute limit case and is consistent with the findings of some recent experimental results.

  12. Analysis and results of a hydrogen moderated isotope production assembly in the Fast Flux Test Facility

    SciTech Connect (OSTI)

    Wootan, D.W.; Rawlins, J.A.; Carter, L.L.; Brager, H.R.; Schenter, R.E.

    1988-06-01T23:59:59.000Z

    A cobalt test assembly containing yttrium hydride pins for neutron moderation was irradiated in the Fast Flux Test Facility during Cycle 9A for 137.7 equivalent full-power days at a power level of 291 MW. The 36 test pins consisted of a batch of 32 pins containing cobalt metal used to produce /sup 60/Co and a set of four pins with europium oxide to produce /sup 153/Gd, a radioisotope used in detection of the bone disease osteoporosis. Postirradiation examination of the cobalt pins determined the /sup 60/Co was produced with an accuracy of about 5%. The measured /sup 60/Co spatially distributed concentrations were within 20% of the calculated concentrations. The assembly average /sup 60/Co measured activity was 4% less than the calculated value. The europium oxide pins were gamma scanned for the europium isotopes /sup 152/Eu and /sup 154/Eu to an absolute accuracy of about 10%. The measured europium radioisotope and /sup 153/Gd concentrations were within 20% of calculated values. The hydride assembly performed well and is an excellent vehicle for many Fast Flux Test Facility isotope production applications. The results also demonstrate the accuracy of the calculational methods developed by the Westinghouse Hanford Company for predicting isotope production rates in this type of assembly. 4 refs., 5 figs., 2 tabs.

  13. Accelerating moderately stiff chemical kinetics in reactive-flow simulations using GPUs

    E-Print Network [OSTI]

    Niemeyer, Kyle E

    2014-01-01T23:59:59.000Z

    The chemical kinetics ODEs arising from operator-split reactive-flow simulations were solved on GPUs using explicit integration algorithms. Nonstiff chemical kinetics of a hydrogen oxidation mechanism (9 species and 38 irreversible reactions) were computed using the explicit fifth-order Runge-Kutta-Cash-Karp method, and the GPU-accelerated version performed faster than single- and six-core CPU versions by factors of 126 and 25, respectively, for 524,288 ODEs. Moderately stiff kinetics, represented with mechanisms for hydrogen/carbon-monoxide (13 species and 54 irreversible reactions) and methane (53 species and 634 irreversible reactions) oxidation, were computed using the stabilized explicit second-order Runge-Kutta-Chebyshev (RKC) algorithm. The GPU-based RKC implementation demonstrated an increase in performance of nearly 59 and 10 times, for problem sizes consisting of 262,144 ODEs and larger, than the single- and six-core CPU-based RKC algorithms using the hydrogen/carbon-monoxide mechanism. With the met...

  14. Effective shear viscosity and dynamics of suspensions of micro-swimmers at moderate concentrations

    SciTech Connect (OSTI)

    Constantin, Lipnikov [Los Alamos National Laboratory; Gyrya, V [PENNSYLVANIA STATE UNIV.; Aronson, I [ANL; Berlyand, L [PENNSYLVANIA STATE UNIV.

    2009-01-01T23:59:59.000Z

    Recently, there have been a number of experimental studies suggesting that a suspension of self-propelled bacteria (microswimmers in general) may have an effective viscosity significantly smaller than the viscosity of the ambient fluid. This is in sharp contrast with suspensions of hard passive inclusions, whose presence always increases the viscosity. Here we present a 2D model for a suspension of microswimmers in a fluid and analyze it analytically in the dilute regime (no swimmer-swimmer interactions) and numerically using a Mimetic Finite Difference discretization. Our analysis shows that in the dilute regime the effective shear viscosity is not affected by self-propulsion. But at the moderate concentrations (due to swimmer-swimmer interactions) the effective viscosity decreases linearly as a function of the propulsion strength of the swimmers. These findings prove that (i) a physically observable decrease of viscosity for a suspension of self-propelled bacteria can be explained purely by hydrodynamic interactions and (ii) self-propulsion and interaction of swimmers are both essential to the reduction of the effective shear viscosity. We performed a number of numerical experiments analyzing the dynamics of swimmers resulting from pairwise interactions. The numerical results agree with the physically observed phenomena (e.g., attraction of swimmer to swimmer and swimmer to the wall). This is viewed as an additional validation of the model and the numerical scheme.

  15. Large climate-moderating envelopes for enclosed structures: a preliminary evaluation of energy conservation potential

    SciTech Connect (OSTI)

    Wendt, R.L.; Giles, G.E.; Park, J.E.

    1981-12-01T23:59:59.000Z

    An investigation was made of the basic impacts of putting a large secondary enclosure around a number of functions and thereby creating a Large Climate Moderating Envelope (LCME). This study is a preliminary estimate of the energy conservation benefits of an LCME. A hypothetical LMCE design was chosen and a coupled fluid dynamic and energy transport analysis was performed to estimate the energy conservation potential of this design. The heat transfer models included insolation, outside air temperature and wind, thermal radiation exchange with the sky, and between the fabric and ground and thermal storage in the earth mass beneath the LCME. The energy transported within the fluid by the buoyancy driven circulation was modeled as an incompressible fluid utilizing the Boussinesq approximation. The climatic conditions were assumed to vary in smooth repeating daily cycles. The numerical simulation of climatic variation was continued until the results within the LCME achieved a repeating daily cycle. The results for selected seasonally characteristic days were utilized to estimate the annual energy consumption of structures within an LCME relative to similar structures exposed to the exterior environment. The relative annual energy savings for summer-dominated climates was estimated to be approx. 70%. The energy savings for a winter-dominated climate LCME were estimated to be somewhat smaller but the LCME concept could offer significant benefits for agricultural applications for this type of climate.

  16. 2 x 2 Polyethylene Reflected and Moderated Highly Enriched Uranium System with Rhenium

    SciTech Connect (OSTI)

    A. Nichole Ellis; Jesson Hutchinson; John D. Bess; Dmitry N. Polyakov; Evgeny S. Glushkov; Alexey E. Glushkov

    2010-09-01T23:59:59.000Z

    The 2 × 2 array HEU-Re experiment was performed on the Planet universal critical assembly machine on November 4th, 2003 at the Los Alamos Critical Experiments Facility (LACEF) at Los Alamos National Laboratory (LANL). For this experiment, there were 10 ˝ units, each full unit containing four HEU foils and two rhenium foils. The top unit contained only two HEU foils and two rhenium foils. A total of 42 HEU foils were used for this experiment. Rhenium is a desirable cladding material for space nuclear power applications. This experiment consisted of HEU foils interleaved with rhenium foils and is moderated and reflected by polyethylene plates. A unit consisted of a polyethylene plate, which has a recess for rhenium foils, and four HEU foils in a single layer in the top recess of each polyethylene plate. The Planet universal criticality assembly machine has been previously used in experiments containing HEU foils interspersed with SiO2 (HEU-MET-THERM-001), Al (HEU-MET-THERM-008), MgO (HEU-MET-THERM-009), Gd foils (HEU-MET-THERM-010), 2 × 2 × 26 Al (HEU-MET-THERM-012), Fe (HEU-MET-THERM-013 and HEU-MET-THERM-015), 2 × 2 × 23 SiO2 (HEU-MET-THERM-014), 2 × 2 × 11 hastalloy plates (HEU-MET-THERM-016), and concrete (HEU-MET-THERM-018). The 2 × 2 array of HEU-Re is considered acceptable for use as a benchmark critical experiment.

  17. 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.

  18. Single particle microscopy with nanometer resolution

    E-Print Network [OSTI]

    Georg Jacob; Karin Groot-Berning; Sebastian Wolf; Stefan Ulm; Luc Couturier; Ulrich G. Poschinger; Ferdinand Schmidt-Kaler; Kilian Singer

    2014-05-26T23:59:59.000Z

    We experimentally demonstrate nanoscopic transmission microscopy relying on a deterministic single particle source. This increases the signal-to-noise ratio with respect to conventional microscopy methods, which employ Poissonian particle sources. We use laser-cooled ions extracted from a Paul trap, and demonstrate remote imaging of transmissive objects with a resolution of 8.6 $\\pm$ 2.0nm and a minimum two-sample deviation of the beam position of 1.5nm. Detector dark counts can be suppressed by 6 orders of magnitudes through gating by the extraction event. The deterministic nature of our source enables an information-gain driven approach to imaging. We demonstrate this by performing efficient beam characterization based on a Bayes experiment design method.

  19. ON THE IMPACT OF SUPER RESOLUTION WSR-88D DOPPLER RADAR DATA ASSIMILATION ON HIGH RESOLUTION NUMERICAL MODEL FORECASTS

    SciTech Connect (OSTI)

    Chiswell, S

    2009-01-11T23:59:59.000Z

    Assimilation of radar velocity and precipitation fields into high-resolution model simulations can improve precipitation forecasts with decreased 'spin-up' time and improve short-term simulation of boundary layer winds (Benjamin, 2004 & 2007; Xiao, 2008) which is critical to improving plume transport forecasts. Accurate description of wind and turbulence fields is essential to useful atmospheric transport and dispersion results, and any improvement in the accuracy of these fields will make consequence assessment more valuable during both routine operation as well as potential emergency situations. During 2008, the United States National Weather Service (NWS) radars implemented a significant upgrade which increased the real-time level II data resolution to 8 times their previous 'legacy' resolution, from 1 km range gate and 1.0 degree azimuthal resolution to 'super resolution' 250 m range gate and 0.5 degree azimuthal resolution (Fig 1). These radar observations provide reflectivity, velocity and returned power spectra measurements at a range of up to 300 km (460 km for reflectivity) at a frequency of 4-5 minutes and yield up to 13.5 million point observations per level in super-resolution mode. The migration of National Weather Service (NWS) WSR-88D radars to super resolution is expected to improve warning lead times by detecting small scale features sooner with increased reliability; however, current operational mesoscale model domains utilize grid spacing several times larger than the legacy data resolution, and therefore the added resolution of radar data is not fully exploited. The assimilation of super resolution reflectivity and velocity data into high resolution numerical weather model forecasts where grid spacing is comparable to the radar data resolution is investigated here to determine the impact of the improved data resolution on model predictions.

  20. Strong words or moderate words: A comparison of the reliability and validity of responses on attitude scales

    E-Print Network [OSTI]

    Frey, Bruce B.; Edwards, Lisa M.

    2011-01-01T23:59:59.000Z

    statistically significant difference was found between one pair of validity coefficients (r = 0.69; r = 0.15; Z = 2.60, p [less than or equal to] 0.01) and that was in the direction opposite from expected, favoring moderately worded items over strongly worded...

  1. Exploring the feasibility of an early warning system in a =moderate seismicity context: case study of Pyrenees

    E-Print Network [OSTI]

    Boyer, Edmond

    Exploring the feasibility of an early warning system in a =moderate seismicity context: case study In the frame of the SISPyr project the feasibility of an Earthquake Early Warning system (EEW) covering project also aims at to assess the feasibility of a Pyrenean earthquake early warning system (EEW

  2. List of Refereed Journal Publications 1. On the Existence of Moderate-Density-Burst Codes, Journal of Mathematical Sciences, Vol.

    E-Print Network [OSTI]

    Saidak, Filip

    List of Refereed Journal Publications 1. On the Existence of Moderate-Density-Burst Codes, Journal of Mathematical Sciences, Vol. 10, 8-12, 1975. 2. On UEP Burst Codes, Journal of Mathematical Sciences, Vol. 10, 21-27, 1975. 3. Linear Codes having a Sub-block Structure, Journal of Cybernetics, Vol. 6, 263

  3. FY 2012 USED FUEL DISPOSITION CAMPAIGN TRANSPORTATION TASK REPORT ON INL EFFORTS SUPPORTING THE MODERATOR EXCLUSION CONCEPT AND STANDARDIZED TRANSPORTATION

    SciTech Connect (OSTI)

    D. K. Morton

    2012-08-01T23:59:59.000Z

    Following the defunding of the Yucca Mountain Project, it is reasonable to assume that commercial used fuel will remain in storage for a longer time period than initially assumed. Previous transportation task work in FY 2011, under the Department of Energy’s Office of Nuclear Energy, Used Fuel Disposition Campaign, proposed an alternative for safely transporting used fuel regardless of the structural integrity of the used fuel, baskets, poisons, or storage canisters after an extended period of storage. This alternative assures criticality safety during transportation by implementing a concept that achieves moderator exclusion (no in-leakage of moderator into the used fuel cavity). By relying upon a component inside of the transportation cask that provides a watertight function, a strong argument can be made that moderator intrusion is not credible and should not be a required assumption for criticality evaluations during normal or hypothetical accident conditions of transportation. This Transportation Task report addresses the assigned FY 2012 work that supports the proposed moderator exclusion concept as well as a standardized transportation system. The two tasks assigned were to (1) promote the proposed moderator exclusion concept to both regulatory and nuclear industry audiences and (2) advance specific technical issues in order to improve American Society of Mechanical Engineers Boiler and Pressure Vessel Code, Section III, Division 3 rules for storage and transportation containments. The common point behind both of the assigned tasks is to provide more options that can be used to resolve current issues being debated regarding the future transportation of used fuel after extended storage.

  4. Minor actinide transmutation in thorium and uranium matrices in heavy water moderated reactors

    SciTech Connect (OSTI)

    Bhatti, Zaki; Hyland, B.; Edwards, G.W.R. [Atomic Energy of Canada Limited, Chalk River Laboratories, 1 Plant Road, Chalk River, Ontario, K0J 1J0 (Canada)

    2013-07-01T23:59:59.000Z

    The irradiation of Th{sup 232} breeds fewer of the problematic minor actinides (Np, Am, Cm) than the irradiation of U{sup 238}. This characteristic makes thorium an attractive potential matrix for the transmutation of these minor actinides, as these species can be transmuted without the creation of new actinides as is the case with a uranium fuel matrix. Minor actinides are the main contributors to long term decay heat and radiotoxicity of spent fuel, so reducing their concentration can greatly increase the capacity of a long term deep geological repository. Mixing minor actinides with thorium, three times more common in the Earth's crust than natural uranium, has the additional advantage of improving the sustainability of the fuel cycle. In this work, lattice cell calculations have been performed to determine the results of transmuting minor actinides from light water reactor spent fuel in a thorium matrix. 15-year-cooled group-extracted transuranic elements (Np, Pu, Am, Cm) from light water reactor (LWR) spent fuel were used as the fissile component in a thorium-based fuel in a heavy water moderated reactor (HWR). The minor actinide (MA) transmutation rates, spent fuel activity, decay heat and radiotoxicity, are compared with those obtained when the MA were mixed instead with natural uranium and taken to the same burnup. Each bundle contained a central pin containing a burnable neutron absorber whose initial concentration was adjusted to have the same reactivity response (in units of the delayed neutron fraction ?) for coolant voiding as standard NU fuel. (authors)

  5. The structure and radiation spectra of illuminated accretion discs in AGN. I. Moderate illumination

    E-Print Network [OSTI]

    A. Ró?a?ska; A. -M. Dumont; B. Czerny; S. Collin

    2002-02-12T23:59:59.000Z

    We present detailed computations of the vertical structure of an accretion disc illuminated by hard X-ray radiation with the code {\\sc titan-noar} suitable for Compton thick media. The energy generated via accretion is dissipated partially in the cold disc as well as in the X-ray source. We study the differences between the case where the X-ray source is in the form of a lamp post above the accretion disc and the case of a heavy corona. We consider radiative heating via Comptonization together with heating via photo-absorption on numerous heavy elements as carbon, oxygen, silicon, iron. The transfer in lines is precisely calculated. A better description of the heating/cooling through the inclusion of line transfer, a correct description of the temperature in the deeper layers, a correct description of the entire disc vertical structure, as well as the study of the possible coronal pressure effect, constitute an improvement in comparison to previous works. We show that exact calculations of hydrostatic equilibrium and determination of the disc thickness has a crucial impact on the optical depth of the hot illuminated zone. We assume a moderate illumination where the viscous flux equals the X-ray radiation flux. A highly ionized skin is created in the lamp post model, with the outgoing spectrum containing many emission lines and ionization edges in emission or absorption in the soft X-ray domain, as well as an iron line at $\\sim 7 $ keV consisting of a blend of low ionization line from the deepest layers and hydrogen and helium like resonance line from the upper layers, and almost no absorption edge, contrary to the case of a slab of constant density.A full heavy corona completely suppresses the highly ionized zone on the top of the accretion disc and in such case the spectrum is featureless.

  6. HIGH-RESOLUTION SPECTROSCOPY OF EXTREMELY METAL-POOR STARS FROM SDSS/SEGUE. I. ATMOSPHERIC PARAMETERS AND CHEMICAL COMPOSITIONS

    SciTech Connect (OSTI)

    Aoki, Wako; Suda, Takuma [National Astronomical Observatory, Mitaka, Tokyo 181-8588 (Japan); Beers, Timothy C. [National Optical Astronomy Observatory, Tucson, AZ 85719 (United States); Lee, Young Sun [Department of Physics and Astronomy and JINA: Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824 (United States); Honda, Satoshi [Kwasan Observatory, Kyoto University, Ohmine-cho Kita Kazan, Yamashin a-ku, Kyoto 607-8471 (Japan); Ito, Hiroko [Department of Astronomical Science, School of Physical Sciences, The Graduate University of Advanced Studies (SOKENDAI), 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); Takada-Hidai, Masahide [Liberal Arts Education Center, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa 259-1292 (Japan); Frebel, Anna [Massachusetts Institute of Technology, Kavli Institute for Astrophysics and Space Research, 77 Massachusetts Avenue, Cambridge, MA 02139 (United States); Fujimoto, Masayuki Y. [Department of Cosmosciences, Graduate School of Science, Hokkaido University, Kita 10 Nishi 8, Kita-ku, Sapporo 060-0810 (Japan); Carollo, Daniela [Department of Physics and Astronomy, Astronomy, Astrophysics, and Astrophotonic Research Center, Macquarie University North Ryde, NSW 2109 (Australia); Sivarani, Thirupathi, E-mail: aoki.wako@nao.ac.jp, E-mail: takuma.suda@nao.ac.jp, E-mail: beers@noao.edu, E-mail: lee@pa.msu.edu, E-mail: honda@kwasan.kyoto-u.ac.jp, E-mail: hidai@apus.rh.u-tokai.ac.jp, E-mail: afrebel@mit.edu, E-mail: fujimoto@astro1.sci.hokudai.ac.jp, E-mail: daniela.carollo@mq.edu.au, E-mail: sivarani@iiap.res.in [Indian Institute of Astrophysics, 2nd block Koramangala, Bangalore 560034 (India)

    2013-01-01T23:59:59.000Z

    Chemical compositions are determined based on high-resolution spectroscopy for 137 candidate extremely metal-poor (EMP) stars selected from the Sloan Digital Sky Survey (SDSS) and its first stellar extension, the Sloan Extension for Galactic Understanding and Exploration (SEGUE). High-resolution spectra with moderate signal-to-noise (S/N) ratios were obtained with the High Dispersion Spectrograph of the Subaru Telescope. Most of the sample (approximately 80%) are main-sequence turnoff stars, including dwarfs and subgiants. Four cool main-sequence stars, the most metal-deficient such stars known, are included in the remaining sample. Good agreement is found between effective temperatures estimated by the SEGUE stellar parameter pipeline, based on the SDSS/SEGUE medium-resolution spectra, and those estimated from the broadband (V - K){sub 0} and (g - r){sub 0} colors. Our abundance measurements reveal that 70 stars in our sample have [Fe/H] < -3, adding a significant number of EMP stars to the currently known sample. Our analyses determine the abundances of eight elements (C, Na, Mg, Ca, Ti, Cr, Sr, and Ba) in addition to Fe. The fraction of carbon-enhanced metal-poor stars ([C/Fe] > +0.7) among the 25 giants in our sample is as high as 36%, while only a lower limit on the fraction (9%) is estimated for turnoff stars. This paper is the first of a series of papers based on these observational results. The following papers in this series will discuss the higher-resolution and higher-S/N observations of a subset of this sample, the metallicity distribution function, binarity, and correlations between the chemical composition and kinematics of extremely metal-poor stars.

  7. Mexico City Aerosol Analysis during MILAGRO using High Resolution...

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

    2: Mexico City Aerosol Analysis during MILAGRO using High Resolution Aerosol Mass Spectrometry at the Urban Supersite (T0). Part 2: Abstract: Submicron aerosol was analyzed during...

  8. Mexico City Aerosol Analysis during MILAGRO using High Resolution...

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

    1: Mexico City Aerosol Analysis during MILAGRO using High Resolution Aerosol Mass Spectrometry at the Urban Supersite (T0). Part 1: Abstract: Submicron aerosol was analyzed during...

  9. atomic resolution 3d: Topics by E-print Network

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

    developed 3D video database of spontaneous facial Cohn, Jeffrey F. 16 Improvement of 3D Printing Resolution by the Development of Shrinkable Materials University of California...

  10. angular resolution 3d: Topics by E-print Network

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

    developed 3D video database of spontaneous facial Cohn, Jeffrey F. 18 Improvement of 3D Printing Resolution by the Development of Shrinkable Materials University of California...

  11. An Automated Platform for High-Resolution Tissue Imaging Using...

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

    entire image is acquired. The performance of the system is demonstrated by imaging rat brain tissue sections. High resolution mass analysis combined with MSMS experiments enabled...

  12. angular resolution optical: Topics by E-print Network

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

    25 Next Page Last Page Topic Index 1 High angular resolution coronography for adaptive optics Astrophysics (arXiv) Summary: Recent adaptive optics systems in astronomy achieve...

  13. High-Resolution Electrospray Ionization Mass Spectrometry Analysis...

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

    Mass Spectrometry Analysis of Water- Soluble Organic Aerosols Collected with a Particle High-Resolution Electrospray Ionization Mass Spectrometry Analysis of Water- Soluble Organic...

  14. Effect of Measurement Precision on Super-resolution Image Reconstruction

    E-Print Network [OSTI]

    Rajan, Dinesh

    University Dallas, Texas 75275 mpc@engr.smu.edu, rajand@engr.smu.edu Abstract: Low-resolution 8-bit and 14

  15. Merging High Resolution Geophysical and Geochemical Surveys to...

    Open Energy Info (EERE)

    Buttes, Oregon Geothermal Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Merging High Resolution Geophysical and Geochemical Surveys to Reduce...

  16. High-Resolution Desorption Electrospray Ionization Mass Spectrometry...

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

    between different mechanisms of chemical aging. Citation: Laskin J, A Laskin, PJ Roach, GW Slysz, GA Anderson, S Nizkorodov, DL Bones, and L Nguyen.2010."High-Resolution...

  17. High-Resolution Differential Ion Mobility Separations Using Helium...

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

    Helium-Rich Gases. High-Resolution Differential Ion Mobility Separations Using Helium-Rich Gases. Abstract: Analyses of complex mixtures and characterization of ions increasingly...

  18. 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 ...

  19. High-Resolution Residential Feeder Load Characterization and...

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

    been a number of investigations into the effects of PV variability on distribution circuit voltage 1. Due to load data resolution limitations and the difficulty in estimating...

  20. atomic resolution imaging: Topics by E-print Network

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

    annular dark-field STEM Dunin-Borkowski, Rafal E. 6 Crystal structure retrieval by maximum entropy analysis of atomic resolution incoherent images Materials Science Websites...

  1. angstrom resolution structure: Topics by E-print Network

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

    imaged, but also allows each material Pennycook, Steve 8 Crystal structure retrieval by maximum entropy analysis of atomic resolution incoherent images Materials Science Websites...

  2. atomic resolution images: Topics by E-print Network

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

    annular dark-field STEM Dunin-Borkowski, Rafal E. 6 Crystal structure retrieval by maximum entropy analysis of atomic resolution incoherent images Materials Science Websites...

  3. ambiguity resolution readers: Topics by E-print Network

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

    for noetherian down-up algebras to be 3-Calabi-Yau. Sergio Chouhy; Andrea Solotar 8 MAXIMUM ENTROPY MODELS FOR NATURAL LANGUAGE AMBIGUITY RESOLUTION Mathematics Websites...

  4. atomic resolution structure: Topics by E-print Network

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

    An axis of 3-fold symmetry runs through Blaber, Michael 8 Crystal structure retrieval by maximum entropy analysis of atomic resolution incoherent images Materials Science Websites...

  5. atomic resolution structural: Topics by E-print Network

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

    An axis of 3-fold symmetry runs through Blaber, Michael 8 Crystal structure retrieval by maximum entropy analysis of atomic resolution incoherent images Materials Science Websites...

  6. atomic resolution structures: Topics by E-print Network

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

    An axis of 3-fold symmetry runs through Blaber, Michael 8 Crystal structure retrieval by maximum entropy analysis of atomic resolution incoherent images Materials Science Websites...

  7. Merging high resolution geophysical and geochemical surveys to...

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

    Merging high resolution geophysical and geochemical surveys to reduce exploration risk at Glass Buttes, Oregon Patrick Walsh Ormat Nevada Inc. Innovative technologies May 19, 2010...

  8. High resolution EUV monochromator/spectrometer

    DOE Patents [OSTI]

    Koike, Masako (Moraga, CA)

    1996-01-01T23:59:59.000Z

    This invention is related to a monochromator which employs a spherical mirror, a traveling plane mirror with simultaneous rotation, and a varied spacing plane grating. The divergent beam from the entrance slit is converged by the spherical mirror located at the various positions in the monochromator depending of the inventive system. To provide the meaningful diffraction efficiencies and to reduce unwanted higher order lights, the deviation angle subtending the incidence and diffraction beams for the plane grating is varied with the position of the traveling plane mirror with simultaneous rotation located in the front or back of the plane grating with wavelength scanning. The outgoing beam from the monochromator goes through the fixed exit slit and has same beam direction regardless of the scanning wavelength. The combination of properly designed motions of the plane mirror and novel varied-spacing parameters of the inventive plane grating corrects the aberrations and focuses the monochromatic spectral image on the exit slit, enabling measurements at high spectral resolution.

  9. High resolution EUV monochromator/spectrometer

    DOE Patents [OSTI]

    Koike, Masako

    1996-06-18T23:59:59.000Z

    This invention is related to a monochromator which employs a spherical mirror, a traveling plane mirror with simultaneous rotation, and a varied spacing plane grating. The divergent beam from the entrance slit is converged by the spherical mirror located at the various positions in the monochromator depending of the inventive system. To provide the meaningful diffraction efficiencies and to reduce unwanted higher order lights, the deviation angle subtending the incidence and diffraction beams for the plane grating is varied with the position of the traveling plane mirror with simultaneous rotation located in the front or back of the plane grating with wavelength scanning. The outgoing beam from the monochromator goes through the fixed exit slit and has same beam direction regardless of the scanning wavelength. The combination of properly designed motions of the plane mirror and novel varied-spacing parameters of the inventive plane grating corrects the aberrations and focuses the monochromatic spectral image on the exit slit, enabling measurements at high spectral resolution. 10 figs.

  10. High resolution spectroscopy of ultracool M dwarfs

    E-Print Network [OSTI]

    I. Neill Reid; J. Davy Kirkpatrick; J. Liebert; J. E. Gizis; C. C. Dahn; D. G. Monet

    2002-04-17T23:59:59.000Z

    (abridged) We present high-resolution echelle spectroscopy of a photometricaly-selected sample if thirty-nine dwarfs with spectral types between M6.5 and L0.5. Two stars, 2MASSI 0253202+271333 and 2MASSW 0952219-192431, are double-lined spectroscopic binaries. We have used our observations to search for Li I 6708 A absorption, characteristic of sub-stellar mass; estimate the level of chromospheric activity through measurement of H-alpha emission fluxes; measure rotational velocities via line broadening; and determine radial velocities and Galactic space motions. Two dwarfs have strong lithium absorption, the previously-known brown dwarf, LP 944-20, and 2MASSI J0335020+234235, which we identify as a probable 0.06 M_sun brown dwarf, age ~1 Gyr. We have investigated the prospect of using the observed frequency of lithium absorption amongst ultracool M dwarfs (M7 to M9.5) as a probe of the initial mass function. The available observations are difficult to reconcile with Salpeter-like power-law mass functions (alpha > 2) for masses below 0.1M_Sun. A comparison between the rotational velocities and -alpha fluxes shows no evidence for significant correlation. Velocity dispersions are significantly lower than those measured for nearby M dwarfs, but show remarkable similarity to results for earlier-type emission-line (dMe) dwarfs. The latter are generally assigned ages of less than ~3 Gyrs.

  11. High vertical resolution crosswell seismic imaging

    DOE Patents [OSTI]

    Lazaratos, Spyridon K. (Houston, TX)

    1999-12-07T23:59:59.000Z

    A method for producing high vertical resolution seismic images from crosswell data is disclosed. In accordance with one aspect of the disclosure, a set of vertically spaced, generally horizontally extending continuous layers and associated nodes are defined within a region between two boreholes. The specific number of nodes is selected such that the value of a particular characteristic of the subterranean region at each of the nodes is one which can be determined from the seismic data. Once values are established at the nodes, values of the particular characteristic are assigned to positions between the node points of each layer based on the values at node within that layer and without regard to the values at node points within any other layer. A seismic map is produced using the node values and the assigned values therebetween. In accordance with another aspect of the disclosure, an approximate model of the region is established using direct arrival traveltime data. Thereafter, the approximate model is adjusted using reflected arrival data. In accordance with still another aspect of the disclosure, correction is provided for well deviation. An associated technique which provides improvements in ray tracing is also disclosed.

  12. RATE DISTORTION OPTIMIZED DOCUMENT CODING USING RESOLUTION ENHANCED RENDERING

    E-Print Network [OSTI]

    RATE DISTORTION OPTIMIZED DOCUMENT CODING USING RESOLUTION ENHANCED RENDERING Guotong Feng , Hui at a fixed bit rate. This method, which we call resolution enhanced rendering (RER), works by adaptively enhanced rendering (RER) for jointly optimizing the THIS WORK IS SUPPORTED BY THE XEROX FOUNDATION. MRC

  13. Image Forgery Detection Using Multi-Resolution Weber Local Descriptors

    E-Print Network [OSTI]

    Bebis, George

    Image Forgery Detection Using Multi-Resolution Weber Local Descriptors Muhammad Hussain1 , Ghulam * ghulam@ksu.edu.sa Abstract-- In this paper, a multi-resolution Weber law descriptors (WLD) based image of the images. Keywords: image forgery detection, Weber local descriptor, splicing forgery, copy-move forgery

  14. Construction and Evaluation of a High Spatial Resolution Wavefront Sensor

    E-Print Network [OSTI]

    Construction and Evaluation of a High Spatial Resolution Wavefront Sensor MARTIN BUSCHBECK Bachelor.3. Analysis program 3 Evaluation of the Hartmann-Shack sensor 3.1 Calibration of the sensor 3.1.1 Reference eyes. In this thesis a high spatial resolution Hartmann-Shack wavefront sensor, which allows the study

  15. ONCOGENOMICS Genomic profiling of malignant melanoma using tiling-resolution

    E-Print Network [OSTI]

    Ringnér, Markus

    ONCOGENOMICS Genomic profiling of malignant melanoma using tiling-resolution arrayCGH G Jo¨ nsson1, Lund, Sweden Malignant melanoma is an aggressive, heterogeneous disease where new biomarkers pathogenesis using 47 different melanoma cell lines and tiling-resolution bacter- ial artificial chromosome

  16. Analogic fiber optic position sensor with nanometric resolution Frdric Lamarque

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Analogic fiber optic position sensor with nanometric resolution Frédéric Lamarque Université de of the sensor is presented as well as experimentation results. Keywords Fiber optic sensor, nanometric size is approximately 1.5x2.0x0.6 mm3 and the measurement resolution is 0.1 µm [4]. An optical sensor

  17. 3742SPACE ISSUES AND RESOLUTION PROCEDURE Space issue or

    E-Print Network [OSTI]

    Page 1 3742SPACE ISSUES AND RESOLUTION PROCEDURE Space issue or conflict identified Do any of the strategies mitigate issue/conflict Complete Conflict Resolution Form Submit form to Space Management Office Space Management Office conduct issue/conflict analysis Space Management Office document possible

  18. A Resolution of the Paradox of Enrichment

    E-Print Network [OSTI]

    Z. C. Feng; Y. Charles Li

    2013-03-11T23:59:59.000Z

    The paradox of enrichment was observed by M. Rosenzweig in a class of predator-prey models. Two of the parameters in the models are crucial for the paradox. These two parameters are the prey's carrying capacity and prey's half-saturation for predation. Intuitively, increasing the carrying capacity due to enrichment of the prey's environment should lead to a more stable predator-prey system. Analytically, it turns out that increasing the carrying capacity always leads to an unstable predator-prey system that is susceptible to extinction from environmental random perturbations. This is the so-called paradox of enrichment. Our resolution here rests upon a closer investigation on a dimensionless number $H$ formed from the carrying capacity and the prey's half-saturation. By recasting the models into dimensionless forms, the models are in fact governed by a few dimensionless numbers including $H$. The effects of the two parameters: carrying capacity and half-saturation are incorporated into the number $H$. In fact, increasing the carrying capacity is equivalent (i.e. has the same effect on $H$) to decreasing the half-saturation which implies more aggressive predation. Since there is no paradox between more aggressive predation and instability of the predator-prey system, the paradox of enrichment is resolved. We also further explore spatially dependent models for which the phase space is infinite dimensional. The spatially independent limit cycle which is generated by a Hopf bifurcation from an unstable steady state, is linearly stable in the infinite dimensional phase space. Numerical simulations indicate that the basin of attraction of the limit cycle is riddled. This shows that spatial perturbations can sometimes (neither always nor never) remove the paradox of enrichment near the limit cycle!

  19. Personality as a Moderating Variable Between Loss of Relationship and Subjective Well-Being in College Students

    E-Print Network [OSTI]

    Smith, Amanda Artell

    2010-10-12T23:59:59.000Z

    , Michael Duffy Committee Members, Daniel Brossart Arnold LeUnes Anita McCormick Head of Department, Victor Willson August 2010 Major Subject: Counseling Psychology iii ABSTRACT Personality as a Moderating Variable Between Loss... appreciation to my doctoral committee: Michael Duffy, Daniel Brossart, Anita McCormick, and Arnold LeUnes. Your continued support has meant a lot to me as I went through this process. I appreciate all the time and effort that was contributed...

  20. HRTEM Imaging of Atoms at Sub-Angstrom Resolution

    SciTech Connect (OSTI)

    O'Keefe, Michael A.; Allard, Lawrence F.; Blom, Douglas A.

    2005-04-06T23:59:59.000Z

    John Cowley and his group at Arizona State University pioneered the use of transmission electron microscopy (TEM) for high-resolution imaging. Images were achieved three decades ago showing the crystal unit cell content at better than 4 Angstrom resolution. This achievement enabled researchers to pinpoint the positions of heavy atom columns within the unit cell. Lighter atoms appear as resolution is improved to sub-Angstrom levels. Currently, advanced microscopes can image the columns of the light atoms (carbon, oxygen, nitrogen) that are present in many complex structures, and even the lithium atoms present in some battery materials. Sub-Angstrom imaging, initially achieved by focal-series reconstruction of the specimen exit surface wave, will become common place for next-generation electron microscopes with CS-corrected lenses and monochromated electron beams. Resolution can be quantified in terms of peak separation and inter-peak minimum, but the limits imposed on the attainable resolution by the properties of the micro-scope specimen need to be considered. At extreme resolution the ''size'' of atoms can mean that they will not be resolved even when spaced farther apart than the resolution of the microscope.

  1. High intrinsic energy resolution photon number resolving detectors

    E-Print Network [OSTI]

    Lolli, L; Portesi, C; Monticone, E; Rajteri, M

    2013-01-01T23:59:59.000Z

    Transition Edge Sensors (TESs) are characterized by the intrinsic figure of merit to resolve both the energy and the statistical distribution of the incident photons. These properties lead TES devices to become the best single photon detector for quantum technology experiments. For a TES based on titanium and gold has been reached, at telecommunication wavelength, an unprecedented intrinsic energy resolution (0.113 eV). The uncertainties analysis of both energy resolution and photon state assignment has been discussed. The thermal properties of the superconductive device have been studied by fitting the bias curve to evaluate theoretical limit of the energy resolution.

  2. Fourier-Based Spectral Analysis with Adaptive Resolution

    E-Print Network [OSTI]

    Andrey Khilko

    2008-06-04T23:59:59.000Z

    Despite being the most popular methods of data analysis, Fourier-based techniques suffer from the problem of static resolution that is currently believed to be a fundamental limitation of the Fourier Transform. Although alternative solutions overcome this limitation, none provide the simplicity, versatility, and convenience of the Fourier analysis. The lack of convenience often prevents these alternatives from replacing classical spectral methods - even in applications that suffer from the limitation of static resolution. This work demonstrates that, contrary to the generally accepted belief, the Fourier Transform can be generalized to the case of adaptive resolution. The generalized transform provides backward compatibility with classical spectral techniques and introduces minimal computational overhead.

  3. aircraft conflict resolution: Topics by E-print Network

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

    Conflict Detection CiteSeer Summary: Conflict detection and resolution schemes operating at the mid-range and short-range level of the air traffic management process are...

  4. U.N. Security Council Resolution 1540: Taking Stock

    SciTech Connect (OSTI)

    Durbin, Karyn R.; Mladineo, Stephen V.

    2006-08-01T23:59:59.000Z

    More than two years have passed since the United Nations (U.N.) Security Council unanimously passed Resolution 1540. This seminal measure requires all U.N. Member States to enact and enforce “effective measures to establish domestic controls to prevent the proliferation of nuclear, chemical, biological weapons and their means of delivery.” Has this Resolution been successful? Did the 1540 Committee established by the Resolution fulfill its mandate? What does the future hold for Resolution 1540? Will it become an integral part of the web of nonproliferation treaties and regimes or will it recede into history as a well-meaning but unfulfilled attempt to prevent proliferation? These questions are timely and important to the nuclear materials management community and a discourse on their answers is needed.

  5. Performance of a High Resolution Cavity Beam Position Monitor System

    SciTech Connect (OSTI)

    Walston, S; Boogert, S; Chung, C; Fitsos, P; Frisch, J; Gronberg, J; Hayano, H; Honda, Y; Kolomensky, Y; Lyapin, A; Malton, S; May, J; McCormick, D; Meller, R; Miller, D; Orimoto, T; Ross, M; Slater, M; Smith, S; Smith, T; Terunuma, N; Thomson, M; Urakawa, J; Vogel, V; Ward, D; White, G

    2006-12-18T23:59:59.000Z

    It has been estimated that an RF cavity Beam Position Monitor (BPM) could provide a position measurement resolution of less than one nanometer. We have developed a high resolution cavity BPM and associated electronics. A triplet comprised of these BPMs was installed in the extraction line of the Accelerator Test Facility (ATF) at the High Energy Accelerator Research Organization (KEK) for testing with its ultra-low emittance beam. The three BPMs were each rigidly mounted inside an alignment frame on six variable-length struts which could be used to move the BPMs in position and angle. We have developed novel methods for extracting the position and tilt information from the BPM signals including a robust calibration algorithm which is immune to beam jitter. To date, we have demonstrated a position resolution of 15.6 nm and a tilt resolution of 2.1 {micro}rad over a dynamic range of approximately {+-} 20 {micro}m.

  6. Performance of a High Resolution Cavity Beam Position Monitor System

    SciTech Connect (OSTI)

    Walston, Sean; Boogert, Stewart; Chung, Carl; Fitsos, Joe; Frisch, Joe; Gronberg, Jeff; Hayano, Hitoshi; Honda, Yosuke; Kolomensky, Yury; Lyapin, Alexey; Malton, Stephen; May, Justin; McCormick, Douglas; Meller, Robert; Miller, David John; Orimoto, Toyoko; Ross, Marc; Slater, Mark; Smith, Steve; Smith, Tonee; Terunuma, Nobuhiro; /Fermilab /UC,

    2007-06-08T23:59:59.000Z

    It has been estimated that an RF cavity Beam Position Monitor (BPM) could provide a position measurement resolution of less than one nanometer. We have developed a high resolution cavity BPM and associated electronics. A triplet comprised of these BPMs was installed in the extraction line of the Accelerator Test Facility (ATF) at the High Energy Accelerator Research Organization (KEK) for testing with its ultra-low emittance beam. The three BPMs were each rigidly mounted inside an alignment frame on six variable-length struts which could be used to move the BPMs in position and angle. We have developed novel methods for extracting the position and tilt information from the BPM signals including a robust calibration algorithm which is immune to beam jitter. To date, we have demonstrated a position resolution of 15.6 nm and a tilt resolution of 2.1 {mu}rad over a dynamic range of approximately {+-} 20 {mu}m.

  7. assays high resolution: Topics by E-print Network

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

    Malbet 1995-09-14 31 High-resolution x-ray telescopes CERN Preprints Summary: High-energy astrophysics is a relatively young scientific field, made possible by space-borne...

  8. analysing high resolution: Topics by E-print Network

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

    Malbet 1995-09-14 34 High-resolution x-ray telescopes CERN Preprints Summary: High-energy astrophysics is a relatively young scientific field, made possible by space-borne...

  9. Exploring electronic structure through high-resolution hard x...

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

    Laboratory Modern high brilliance beamlines coupled with recent advances in hard-x-ray optics are establishing high-resolution hard x-ray spectroscopies as a powerful analytical...

  10. atomic resolution electron: Topics by E-print Network

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

    to be at most one yttrium atom every 17 . I. A. Ziegler; C. Kisielowski; M. J. Hoffmann; R. O. Ritchie 2003-01-01 10 Resolution Limits of Electron-Beam Lithography toward...

  11. Performance evaluation for conflict resolution transaction management approach

    SciTech Connect (OSTI)

    Lee, J.C. [Argonne National Lab., IL (United States); Henschen, L.J. [Northwestern Univ., Evanston, IL (United States). Dept. of EECS

    1997-05-01T23:59:59.000Z

    The authors continue their previous study on the conflict resolution approach to transaction management. They compare both time and space performance of their approach with those of other transaction management models. They use mathematical abstraction and calculation for the comparison.

  12. High resolution linkage and association study of quantitative trait loci

    E-Print Network [OSTI]

    Jung, Jeesun

    2005-11-01T23:59:59.000Z

    ) of complex human disease. For many complex diseases, quantitative phenotype values contain more information than dichotomous traits do. Much research has been done on conducting high resolution mapping using information of linkage and linkage disequilibrium...

  13. 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

  14. High Resolution Muon Computed Tomography at Neutrino Beam Facilities

    E-Print Network [OSTI]

    Suerfu, Burkhant

    2015-01-01T23:59:59.000Z

    X-ray computed tomography (CT) has an indispensable role in constructing 3D images of objects made from light materials. However, limited by absorption coefficients, X-rays cannot deeply penetrate materials such as copper and lead. Here we show via simulation that muon beams can provide high resolution tomographic images of dense objects and of structures within the interior of dense objects. The effects of resolution broadening from multiple scattering diminish with increasing muon momentum. As the momentum of the muon increases, the contrast of the image goes down and therefore requires higher resolution in the muon spectrometer to resolve the image. The variance of the measured muon momentum reaches a minimum and then increases with increasing muon momentum. The impact of the increase in variance is to require a higher integrated muon flux to reduce fluctuations. The flux requirements and level of contrast needed for high resolution muon computed tomography are well matched to the muons produced in the pio...

  15. Magnetic nanowire based high resolution magnetic force microscope probes

    E-Print Network [OSTI]

    Qin, Lu-Chang

    -resolution magnetic force microscope probes using preformed magnetic nanowires. Nickel and cobalt nanowires produced by electrodeposition were directly assembled onto the tip of a commercial atomic force microscope cantilever

  16. High resolution linkage and association study of quantitative trait loci 

    E-Print Network [OSTI]

    Jung, Jeesun

    2005-11-01T23:59:59.000Z

    As a large number of single nucleotide polymorphisms (SNPs) and microsatellite markers are available, high resolution mapping employing multiple markers or multiple allele markers is an important step to identify quantitative ...

  17. Achieving sub-10-nm resolution using scanning electron beam lithography

    E-Print Network [OSTI]

    Cord, Bryan M. (Bryan Michael), 1980-

    2009-01-01T23:59:59.000Z

    Achieving the highest possible resolution using scanning-electron-beam lithography (SEBL) has become an increasingly urgent problem in recent years, as advances in various nanotechnology applications have driven demand for ...

  18. atomic resolution crystal: Topics by E-print Network

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

    18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Crystal structure retrieval by maximum entropy analysis of atomic resolution incoherent images Materials Science Websites...

  19. angstrom resolution crystal: Topics by E-print Network

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

    Muller, David A; 10.1103PhysRevB.86.195415 2012-01-01 5 Crystal structure retrieval by maximum entropy analysis of atomic resolution incoherent images Materials Science Websites...

  20. Transmutation, Burn-Up and Fuel Fabrication Trade-Offs in Reduced-Moderation Water Reactor Thorium Fuel Cycles - 13502

    SciTech Connect (OSTI)

    Lindley, Benjamin A.; Parks, Geoffrey T. [University of Cambridge, Cambridge (United Kingdom)] [University of Cambridge, Cambridge (United Kingdom); Franceschini, Fausto [Westinghouse Electric Company LLC, Cranberry Township, PA (United States)] [Westinghouse Electric Company LLC, Cranberry Township, PA (United States)

    2013-07-01T23:59:59.000Z

    Multiple recycle of long-lived actinides has the potential to greatly reduce the required storage time for spent nuclear fuel or high level nuclear waste. This is generally thought to require fast reactors as most transuranic (TRU) isotopes have low fission probabilities in thermal reactors. Reduced-moderation LWRs are a potential alternative to fast reactors with reduced time to deployment as they are based on commercially mature LWR technology. Thorium (Th) fuel is neutronically advantageous for TRU multiple recycle in LWRs due to a large improvement in the void coefficient. If Th fuel is used in reduced-moderation LWRs, it appears neutronically feasible to achieve full actinide recycle while burning an external supply of TRU, with related potential improvements in waste management and fuel utilization. In this paper, the fuel cycle of TRU-bearing Th fuel is analysed for reduced-moderation PWRs and BWRs (RMPWRs and RBWRs). RMPWRs have the advantage of relatively rapid implementation and intrinsically low conversion ratios. However, it is challenging to simultaneously satisfy operational and fuel cycle constraints. An RBWR may potentially take longer to implement than an RMPWR due to more extensive changes from current BWR technology. However, the harder neutron spectrum can lead to favourable fuel cycle performance. A two-stage fuel cycle, where the first pass is Th-Pu MOX, is a technically reasonable implementation of either concept. The first stage of the fuel cycle can therefore be implemented at relatively low cost as a Pu disposal option, with a further policy option of full recycle in the medium term. (authors)

  1. Special Analysis: Atmospheric Dose Resulting from the Release of C14 from Reactor Moderator Deionizers in a Disposal Environment

    SciTech Connect (OSTI)

    Hiergesell, Robert A.; Swingle, Robert F.

    2005-08-18T23:59:59.000Z

    The proposed action of disposing of 52 moderator deionizer vessels within the ILV was evaluated in this SA. In particular, a detailed analysis of the release of {sup 14}C via the atmospheric pathway was conducted for these vessels since the major concern has been the nearly 20 Ci of {sup 14}C that is associated with each vessel. The more rigorous evaluation of the atmospheric pathway for {sup 14}C included incorporation of new information about the chemical availability of {sup 14}C when disposed in a grout/cement encapsulation environment, as will be the case in the ILV. This information was utilized to establish the source term for a 1-D numerical model to simulate the diffusion of {sup 14}CO{sub 2} from the ILV Waste Zone to the land surface. The results indicate a peak surface emanation rate from the entire ILV of 1.42E-08 Ci/yr with an associated dose of only 3.83E-05 mrem/yr to the Maximally Exposed Individual (MEI) at 100m. The fact that the atmospheric pathway exposure for {sup 14}C is controlled by chemical solubility limits for {sup 14}C between the solid waste, pore water and pore vapor within the disposal environment rather than the absolute inventory suggests that the establishment of specific facility limits is inappropriate. With the relaxation of the atmospheric pathway restriction, the groundwater pathway becomes the more restrictive in terms of disposing {sup 14}C or {sup 14}C{sub KB} within the ILV. Since the resin-based {sup 14}C of the 52 moderator deionizer vessels is highly similar to the {sup 14}C{sub KB} waste form, the inventory from the 52 deionizer vessels is compared against the groundwater limits for that waste form. The small groundwater pathway fraction (1.14E-05) calculated for the proposed inventory of the 52 moderator deionizer vessels indicates that the proposed action will have an insignificant impact with respect to possible exposures via the groundwater pathway. This investigation recommends that there be no ILV Atmospheric pathway limit for {sup 14}C and {sup 14}C{sub KB}. Further, in the absence of an Atmospheric pathway limit it was determined that there are no other applicable ILV limits (Groundwater or Intruder pathway) that would be impacted in any significant fashion should the waste package be disposed within the ILV. Thus, it is concluded that the disposal of 52 moderator deionizer vessels can easily be accommodated within the ILV.

  2. Analysis of the burping behavior of the cold solid methane moderator at IPNS (Intense Pulsed Neutron Source)

    SciTech Connect (OSTI)

    Carpenter, J.M.; Walter, U.

    1986-01-01T23:59:59.000Z

    Examination of the cold solid methane moderator at IPNS (Model II) revealed that a circumferential weld failed due to high internal pressure, such as would be caused by thermal expansion of solid methane or the release of Hydrogen gas upon spontaneous heating. This weld is the main object of current attention for a design of a replacement. The present paper deals with the processes which lead to the burping behavior and outlines the analysis of some of the consequences. The purpose is to determine conditions under which the system can operate at the lowest possible temperature, avoiding the problems experienced to data.

  3. Edinburgh Research Explorer High-resolution gene expression profiling for simultaneous

    E-Print Network [OSTI]

    Millar, Andrew J.

    Edinburgh Research Explorer High-resolution gene expression profiling for simultaneous kinetic, UH 2008, 'High-resolution gene expression profiling for simultaneous kinetic parameter analysis date: 16. Jun. 2014 #12;METHOD High-resolution gene expression profiling for simultaneous kinetic

  4. High Resolution X-Ray Scattering at Sector 3, Advanced Photon...

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

    about 1 meV resolution; momentum resolved inelastic x-ray scattering with about 1 meV resolution (HERIX); Synchrotron Mossbauer spectroscopy with about 10 neV resolution (SMS)....

  5. An Investigation of the Rotamers of Butadiene by High-Resolution...

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

    Investigation of the Rotamers of Butadiene by High-Resolution Infrared Spectroscopy. An Investigation of the Rotamers of Butadiene by High-Resolution Infrared Spectroscopy....

  6. HIGH RESOLUTION SCANNING AUGER MICROSCOPIC INVESTIGATION OF INTERGRANULAR FRACTURE IN AS-QUENCHED Fe-12Mn

    E-Print Network [OSTI]

    Lee, H.J.

    2013-01-01T23:59:59.000Z

    contents in Fe-Mn alloys. Scanning electron fractographsTransactions HIGH RESOLUTION SCANNING AUGER MICROSCOPICof Califomia. HIGH RESOLUTION SCANNING AUGER MICROSCOPIC

  7. High Resolution Additive Patterning of Nanoparticles and Polymers Enabled by Vapor Permeable Polymer Templates

    E-Print Network [OSTI]

    Demko, Michael Thomas

    2012-01-01T23:59:59.000Z

    High Resolution Additive Patterning of Nanoparticles andHigh Resolution Additive Patterning of Nanoparticles andareas, and in a completely additive manner. In this work, a

  8. Development of Superconducting High-Resolution Gamma-Ray Spectrometers for Nuclear Safeguards

    E-Print Network [OSTI]

    Dreyer, Jonathan

    2012-01-01T23:59:59.000Z

    Counting 2.4.3 High-Resolution Gamma Spectrometry 2.5coincidence counting and gamma spectrometry system (CANEGA)High-Resolution Gamma Spectrometry Isotopic correlation

  9. High Resolution Backside Imaging and Thermography using a Numerical Aperture Increasing Lens

    E-Print Network [OSTI]

    High Resolution Backside Imaging and Thermography using a Numerical Aperture Increasing Lens M. S, representing the highest resolution subsurface thermography to date. Keywords: thermal imaging, high

  10. High Resolution Muon Computed Tomography at Neutrino Beam Facilities

    E-Print Network [OSTI]

    Burkhant Suerfu; Christopher G. Tully

    2015-01-28T23:59:59.000Z

    X-ray computed tomography (CT) has an indispensable role in constructing 3D images of objects made from light materials. However, limited by absorption coefficients, X-rays cannot deeply penetrate materials such as copper and lead. Here we show via simulation that muon beams can provide high resolution tomographic images of dense objects and of structures within the interior of dense objects. The effects of resolution broadening from multiple scattering diminish with increasing muon momentum. As the momentum of the muon increases, the contrast of the image goes down and therefore requires higher resolution in the muon spectrometer to resolve the image. The variance of the measured muon momentum reaches a minimum and then increases with increasing muon momentum. The impact of the increase in variance is to require a higher integrated muon flux to reduce fluctuations. The flux requirements and level of contrast needed for high resolution muon computed tomography are well matched to the muons produced in the pion decay pipe at a neutrino beam facility and what can be achieved for momentum resolution in a muon spectrometer. Such an imaging system can be applied in archaeology, art history, engineering, material identification and whenever there is a need to image inside a transportable object constructed of dense materials.

  11. Broadband high resolution X-ray spectral analyzer

    DOE Patents [OSTI]

    Silver, E.H.; Legros, M.; Madden, N.W.; Goulding, F.; Landis, D.

    1998-07-07T23:59:59.000Z

    A broad bandwidth high resolution X-ray fluorescence spectrometer has a performance that is superior in many ways to those currently available. It consists of an array of 4 large area microcalorimeters with 95% quantum efficiency at 6 keV and it produces X-ray spectra between 0.2 keV and 7 keV with an energy resolution of 7 to 10 eV. The resolution is obtained at input count rates per array element of 10 to 50 Hz in real-time, with analog pulse processing and thermal pile-up rejection. This performance cannot be matched by currently available X-ray spectrometers. The detectors are incorporated into a compact and portable cryogenic refrigerator system that is ready for use in many analytical spectroscopy applications as a tool for X-ray microanalysis or in research applications such as laboratory and astrophysical X-ray and particle spectroscopy. 6 figs.

  12. Broadband high resolution X-ray spectral analyzer

    DOE Patents [OSTI]

    Silver, Eric H. (Berkeley, CA); Legros, Mark (Berkeley, CA); Madden, Norm W. (Livermore, CA); Goulding, Fred (Lafayette, CA); Landis, Don (Pinole, CA)

    1998-01-01T23:59:59.000Z

    A broad bandwidth high resolution x-ray fluorescence spectrometer has a performance that is superior in many ways to those currently available. It consists of an array of 4 large area microcalorimeters with 95% quantum efficiency at 6 keV and it produces x-ray spectra between 0.2 keV and 7 keV with an energy resolution of 7 to 10 eV. The resolution is obtained at input count rates per array element of 10 to 50 Hz in real-time, with analog pulse processing and thermal pile-up rejection. This performance cannot be matched by currently available x-ray spectrometers. The detectors are incorporated into a compact and portable cryogenic refrigerator system that is ready for use in many analytical spectroscopy applications as a tool for x-ray microanalysis or in research applications such as laboratory and astrophysical x-ray and particle spectroscopy.

  13. Benchmarking Compressed Sensing, Super-Resolution, and Filter Diagonalization

    E-Print Network [OSTI]

    Markovich, Thomas; Sanders, Jacob N; Aspuru-Guzik, Alan

    2015-01-01T23:59:59.000Z

    Signal processing techniques have been developed that use different strategies to bypass the Nyquist sampling theorem in order to recover more information than a traditional discrete Fourier transform. Here we examine three such methods: filter diagonalization, compressed sensing, and super-resolution. We apply them to a broad range of signal forms commonly found in science and engineering in order to discover when and how each method can be used most profitably. We find that filter diagonalization provides the best results for Lorentzian signals, while compressed sensing and super-resolution perform better for arbitrary signals.

  14. Energy resolution of terahertz single-photon-sensitive bolometric detectors

    E-Print Network [OSTI]

    Santavicca, D F; Karasik, B S; Pereverzev, S V; Olaya, D; Gershenson, M E; Frunzio, L; Prober, D E

    2009-01-01T23:59:59.000Z

    We report measurements of the energy resolution of superconducting bolometric detectors with sufficient sensitivity to count single terahertz photons. The detector is a superconducting titanium nanobridge with niobium contacts. The larger superconducting energy gap in the niobium confines excitations in the titanium nanobridge, and the thermal relaxation time is set by electron-phonon coupling in the titanium. A fast microwave pulse is used to simulate a single higher-frequency photon, where the absorbed energy of the pulse is equal to the photon energy. Present devices have a measured intrinsic energy resolution of 6 terahertz, near the predicted value due to intrinsic thermal fluctuation noise.

  15. Improving the resolution of chopper spectrometers at pulsed neutron sources

    SciTech Connect (OSTI)

    Carpenter, J.M. (Argonne National Lab., IL (USA)); Mildner, D.F.R. (National Bureau of Standards, Washington, DC (USA). Center for Analytical Chemistry)

    1990-01-01T23:59:59.000Z

    We examine the relationships between intensity and resolution in pulsed-source chopper spectrometers, including the effects of Soller collimation, narrower rotor slits and higher rotor speeds. The basis is a simplified description of a spectrometer, approximately optimizing the rotor pulse and lighthouse effects. the analysis includes a new treatment of the angular distribution transmitted through a system consisting of a coarse collimator and a Soller collimator. The results encourage the prospect for a reasonably easily accomplished, higher resolution, optional configuration of the pulsed source chopper spectrometers at IPNS. 6 refs., 5 figs.

  16. Radiogenic lead with dominant content of {sup 208}Pb: New coolant and neutron moderator for innovative nuclear reactors

    SciTech Connect (OSTI)

    Shmelev, A. N.; Kulikov, G. G.; Kryuchkov, E. F.; Apse, V. A.; Kulikov, E. G. [National Research Nuclear Univ. MEPhI, Kashirskoe shosse, 31, 115409, Moscow (Russian Federation)

    2012-07-01T23:59:59.000Z

    The advantages of radiogenic lead with dominant content of {sup 208}Pb as a reactor coolant with respect to natural lead are caused by unique nuclear properties of {sup 208}Pb which is a double-magic nucleus with closed proton and neutron shells. This results in significantly lower micro cross section and resonance integral of radiative neutron capture by {sup 208}Pb than those for numerous light neutron moderators. The extremely weak ability of {sup 208}Pb to absorb neutrons results in the following effects. Firstly, neutron moderating factor (ratio of scattering to capture cross sections) is larger than that for graphite and light water. Secondly, age and diffusion length of thermal neutrons are larger than those for graphite, light and heavy water. Thirdly, neutron lifetime in {sup 208}Pb is comparable with that for graphite, beryllium and heavy water what could be important for safe reactor operation. The paper presents some results obtained in neutronics and thermal-hydraulics evaluations of the benefits from the use of radiogenic lead with dominant content of {sup 208}Pb instead of natural lead as a coolant of fast breeder reactors. The paper demonstrates that substitution of radiogenic lead for natural lead can offer the following benefits for operation of fast breeder reactors. Firstly, improvement of the reactor safety thanks to the better values of coolant temperature reactivity coefficient and, secondly, improvement of some thermal-hydraulic reactor parameters. Radiogenic lead can be extracted from thorium sludge without isotope separation as {sup 208}Pb is a final isotope in the decay chain of {sup 232}Th. (authors)

  17. MOLYBDENUM, RUTHENIUM, AND THE HEAVY r-PROCESS ELEMENTS IN MODERATELY METAL-POOR MAIN-SEQUENCE TURNOFF STARS

    SciTech Connect (OSTI)

    Peterson, Ruth C. [Astrophysical Advances, 607 Marion Place, Palo Alto, CA 94301 (United States)

    2013-05-01T23:59:59.000Z

    The ratios of elemental abundances observed in metal-poor stars of the Galactic halo provide a unique present-day record of the nucleosynthesis products of its earliest stars. While the heaviest elements were synthesized by the r- and s-processes, dominant production mechanisms of light trans-ironic elements were obscure until recently. This work investigates further our 2011 conclusion that the low-entropy regime of a high-entropy wind (HEW) produced molybdenum and ruthenium in two moderately metal-poor turnoff stars that showed extreme overabundances of those elements with respect to iron. Only a few, rare nucleosynthesis events may have been involved. Here we determine abundances for Mo, Ru, and other trans-Fe elements for 28 similar stars by matching spectral calculations to well-exposed near-UV Keck HIRES spectra obtained for beryllium abundances. In each of the 26 turnoff stars with Mo or Ru line detections and no evidence for s-process production (therefore old), we find Mo and Ru to be three to six times overabundant. In contrast, the maximum overabundance is reduced to factors of three and two for the neighboring elements zirconium and palladium. Since the overproduction peaks sharply at Mo and Ru, a low-entropy HEW is confirmed as its origin. The overabundance level of the heavy r-process elements varies significantly, from none to a factor of four, but is uncorrelated with Mo and Ru overabundances. Despite their moderate metallicity, stars in this group trace the products of different nucleosynthetic events: possibly very few events, possibly events whose output depended on environment, metallicity, or time.

  18. Decreasing range resolution of a SAR image to permit correction of motion measurement errors beyond the SAR range resolution

    DOE Patents [OSTI]

    Doerry, Armin W. (Albuquerque, NM); Heard, Freddie E. (Albuquerque, NM); Cordaro, J. Thomas (Albuquerque, NM)

    2010-07-20T23:59:59.000Z

    Motion measurement errors that extend beyond the range resolution of a synthetic aperture radar (SAR) can be corrected by effectively decreasing the range resolution of the SAR in order to permit measurement of the error. Range profiles can be compared across the slow-time dimension of the input data in order to estimate the error. Once the error has been determined, appropriate frequency and phase correction can be applied to the uncompressed input data, after which range and azimuth compression can be performed to produce a desired SAR image.

  19. High resolution non-contact thermal characterization of semiconductor devices

    E-Print Network [OSTI]

    imaging can have spatial resolution better than the diffraction limit of an infrared camera and can work infrared microscopes. Also, since the thermoreflectance technique does not rely upon the emitted black body measured the heating on a 35x35 micron MOS transistor, and Mansanares5 who measured temperature

  20. Atmospheric Climate Model Experiments Performed at Multiple Horizontal Resolutions

    SciTech Connect (OSTI)

    Phillips, T; Bala, G; Gleckler, P; Lobell, D; Mirin, A; Maxwell, R; Rotman, D

    2007-12-21T23:59:59.000Z

    This report documents salient features of version 3.3 of the Community Atmosphere Model (CAM3.3) and of three climate simulations in which the resolution of its latitude-longitude grid was systematically increased. For all these simulations of global atmospheric climate during the period 1980-1999, observed monthly ocean surface temperatures and sea ice extents were prescribed according to standard Atmospheric Model Intercomparison Project (AMIP) values. These CAM3.3 resolution experiments served as control runs for subsequent simulations of the climatic effects of agricultural irrigation, the focus of a Laboratory Directed Research and Development (LDRD) project. The CAM3.3 model was able to replicate basic features of the historical climate, although biases in a number of atmospheric variables were evident. Increasing horizontal resolution also generally failed to ameliorate the large-scale errors in most of the climate variables that could be compared with observations. A notable exception was the simulation of precipitation, which incrementally improved with increasing resolution, especially in regions where orography plays a central role in determining the local hydroclimate.

  1. Video Entity Resolution: Applying ER Techniques for Smart Video Surveillance

    E-Print Network [OSTI]

    Kalashnikov, Dmitri V.

    buildings, smart grid, and so on. In this paper, we focus on smart surveillance systems wherein video improvements on how the building is used. One of the key challenges in building smart surveillance systemsVideo Entity Resolution: Applying ER Techniques for Smart Video Surveillance Liyan Zhang Ronen

  2. Evaluation of Compass Ambiguity Resolution Performance Using Geometric-Based

    E-Print Network [OSTI]

    Calgary, University of

    Evaluation of Compass Ambiguity Resolution Performance Using Geometric-Based Techniques Satellite Division. ABSTRACT The Chinese GNSS system, Compass, is expected to be operational in the near application areas involving Compass will be carrier-phase based precise positioning. However, the associated

  3. High-Resolution Simulations of Coal Injection in A Gasifier

    SciTech Connect (OSTI)

    Li, Tingwen [National Energy Technology Laboratory (NETL); Gel, Aytekin [Aeolus Research Inc.; Syamlal, M [National Energy Technology Laboratory (NETL); Guenther, Chris [National Energy Technology Laboratory (NETL); Pannala, Sreekanth [ORNL

    2010-01-01T23:59:59.000Z

    This study demonstrates an approach to effectively combine high- and low-resolution simulations for design studies of industrial coal gasifier. The flow-field data from a 10 million cell full-scale simulation of a commercial-scale gasifier were used to construct a reduced configuration to economically study the coal injection in detail. High-resolution numerical simulations of the coal injection were performed using the open-source code MFIX running on a high performance computing system. Effects of grid resolution and numerical discretization scheme on the predicted behavior of coal injection and gasification kinetics were analyzed. Pronounced differences were predicted in the devolatilization and steam gasification rates because of different discretization schemes, implying that a high-order numerical scheme is required to predict well the unsteady gasification process on an adequately resolved grid. Computational costs for simulations of varying resolutions are presented to illustrate the trade-off between the accuracy of solution and the time-to-solution, an important consideration when engineering simulations are used for the design of commercial-scale units.

  4. Correcting second-order contamination in low-resolution spectra

    E-Print Network [OSTI]

    V. Stanishev

    2007-05-23T23:59:59.000Z

    An empirical method for correcting low-resolution astronomical spectra for second-order contamination is presented. The method was developed for correcting spectra obtained with grism #4 of the ALFOSC spectrograph at the Nordic Optical Telescope and the performance is demonstrated on spectra of two nearby bright Type Ia supernovae.

  5. RESOLUTION NO. 2011-82 ADOPTING MODESTO IRRIGATION DISTRICT'S RENEWABLE

    E-Print Network [OSTI]

    RESOLUTION NO. 2011-82 ADOPTING MODESTO IRRIGATION DISTRICT'S RENEWABLE ENERGY RESOURCES Standard (RPS) in an effort to meet 20 percent ofits retail energy sales with renewable resources by 2017 for consideration by the Board of Directors, attached hereto as Attachment A, Renewable Energy Resources Enforcement

  6. Introduction to the Ocean Drilling Program JOIDES RESOLUTION

    E-Print Network [OSTI]

    Introduction to the Ocean Drilling Program JOIDES RESOLUTION OCEAN DRILLING PROGRAM TECHNICAL NOTE 11 1989 #12;TEXAS A&M UNIVERSITY #12;INTRODUCTION TO THE OCEAN DRILLING PROGRAM Ocean Drilling Program Texas A&M University Technical Note No. 11 Anne Gilbert Graham Ocean Drilling Program Texas A

  7. Radiology utilizing a gas multiwire detector with resolution enhancement

    DOE Patents [OSTI]

    Majewski, Stanislaw (Grafton, VA); Majewski, Lucasz A. (Grafton, VA)

    1999-09-28T23:59:59.000Z

    This invention relates to a process and apparatus for obtaining filmless, radiological, digital images utilizing a gas multiwire detector. Resolution is enhanced through projection geometry. This invention further relates to imaging systems for X-ray examination of patients or objects, and is particularly suited for mammography.

  8. Supplementary Information Super-resolution imaging reveals eightfold symmetry of

    E-Print Network [OSTI]

    Rieger, Bernd

    around the nuclear pore complex and resolves the central channel with nanometer resolution Anna to M.S. (m.sauer@uni-wuerzburg.de). #12; 2 Figure S1. Alexa647 labeled gp210 protein in the nuclear bar 5 µm. #12; 3 Figure S2. Nuclear envelope resolved by two different microscopy methods. (a

  9. Notice of Data Request and Issues Resolution Workshop for the

    E-Print Network [OSTI]

    . If approved, each solar plant would generate 250 megawatts (MW), for a total net output of 750 MW and would of each solar field. Each solar plant would utilize approximately 85,000 heliostats. PARTICIPATION PleaseNotice of Data Request and Issues Resolution Workshop for the Rio Mesa Solar Electric Generating

  10. High-resolution speech signal reconstruction in Wireless Sensor Networks

    E-Print Network [OSTI]

    Gutierrez-Osuna, Ricardo

    High-resolution speech signal reconstruction in Wireless Sensor Networks Andria Pazarloglou, Radu With the recent growth of Wireless Sensor Networks (WSNs), many advanced application areas have received sig, rgutier}@cs.tamu.edu Abstract--Data streaming is an emerging class of applica- tions for sensor networks

  11. Resolution on the retirement of Martin L. Zelin

    E-Print Network [OSTI]

    Patel, Aniruddh D.

    Resolution on the retirement of Martin L. Zelin Adopted by the Faculty of Arts, Sciences and Engineering Today marks the retirement of Professor of Psychology Martin L. Zelin after 38 years of service and had one of the first accounts on one of our early shared access systems. He also has served

  12. Greenland Observed at High Resolution by the Seasat Scatterometer

    E-Print Network [OSTI]

    Long, David G.

    Greenland Observed at High Resolution by the Seasat Scatterometer D.G. Long', P.J. Hardin2, and RA to SASS data for the study of Greenland's ice sheet. We present a time series of the radar backscatter images over Greenland covering the time period July-September 1978. The images provide an island

  13. Polymer Imprint Lithography with Molecular-Scale Resolution

    E-Print Network [OSTI]

    Rogers, John A.

    areas on a range of substrates are key features for this unusual application of SWNTs. Methane-based with photolithographic techniques allows their resolution limits to be specified accurately, those of NGLs based microns, their chemical inertness, and the ability to grow or deposit them in large quantities over large

  14. Geometric Programming and Mechanism Design for Air Traffic Conflict Resolution

    E-Print Network [OSTI]

    Pappas, George J.

    methods in air traffic control. The problem considered concerns the scheduling of the crossing times traffic controller (ATC). In this setting, numerous conflict resolution methods have been proposed have different valuations for the additional delays imposed by the ATC, and might be willing

  15. CLINICAL SCIENCES High-Speed UltraHigh-Resolution Optical

    E-Print Network [OSTI]

    Srinivasan, Vivek J.

    of the perifoveal pho- toreceptor inner segment/outer segment junction and thin- ning of the outer nuclear layer- velopedbyourgroupforuseintheophthal- mologyclinicattheNewEnglandEyeCen- ter,Boston,Mass.Thissystemusesspectral or­high-resolutionOCTenablessuperior visualizationofretinalmorphologyinanum- Author Affiliations: New England Eye Center, Tufts­New England Medical Center, Tufts University

  16. High-resolution ionization detector and array of such detectors

    DOE Patents [OSTI]

    McGregor, Douglas S. (Ypsilanti, MI); Rojeski, Ronald A. (Pleasanton, CA)

    2001-01-16T23:59:59.000Z

    A high-resolution ionization detector and an array of such detectors are described which utilize a reference pattern of conductive or semiconductive material to form interaction, pervious and measurement regions in an ionization substrate of, for example, CdZnTe material. The ionization detector is a room temperature semiconductor radiation detector. Various geometries of such a detector and an array of such detectors produce room temperature operated gamma ray spectrometers with relatively high resolution. For example, a 1 cm.sup.3 detector is capable of measuring .sup.137 Cs 662 keV gamma rays with room temperature energy resolution approaching 2% at FWHM. Two major types of such detectors include a parallel strip semiconductor Frisch grid detector and the geometrically weighted trapezoid prism semiconductor Frisch grid detector. The geometrically weighted detector records room temperature (24.degree. C.) energy resolutions of 2.68% FWHM for .sup.137 Cs 662 keV gamma rays and 2.45% FWHM for .sup.60 Co 1.332 MeV gamma rays. The detectors perform well without any electronic pulse rejection, correction or compensation techniques. The devices operate at room temperature with simple commercially available NIM bin electronics and do not require special preamplifiers or cooling stages for good spectroscopic results.

  17. RESOLUTION NO: 12-0328-3 STATE OF CALIFORNIA

    E-Print Network [OSTI]

    , the Renewables Portfolio Standard Eligibility Guidebook, Fourth Edition, describes "biomethane" as biogas COMMISSION RESOLUTION SUSPENSION OF RPS ELIGIBILITY GUIDELINES RELATED TO BIOMETHANE WHEREAS by the Energy Commission on December 15,2010, identifies biomethane as a renewable resource and allows power

  18. RESOLUTION NO: 12-0328-3 STATE OF CALIFORNIA

    E-Print Network [OSTI]

    , the Renewables Portfolio Standard Eligibility Guidebook, Fourth Edition, describes "biomethane" as biogas COMMISSION CORRECTED RESOLUTION SUSPENSION OF RPS ELIGIBILITY GUIDELINES RELATED TO BIOMETHANE WHEREAS by the Energy Commission on December 15, 2010, identifies biomethane as a renewable resource and allows power

  19. LBNL 59017 JArt 1 Improved Spatial Resolution in Thick, Fully-

    E-Print Network [OSTI]

    LBNL 59017 JArt 1 Improved Spatial Resolution in Thick, Fully- Depleted CCDs with Enhanced Red developed at Lawrence Berkeley National Laboratory (LBNL). Because they can be over-depleted, the LBNL measure an rms diffusion of 3.7 ± 0.2 m. Lateral charge diffusion in LBNL CCDs will meet the SNAP

  20. 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

  1. Enhanced resolution and throughput of Fresnel incoherent correlation holography (FINCH)

    E-Print Network [OSTI]

    Rosen, Joseph

    Enhanced resolution and throughput of Fresnel incoherent correlation holography (FINCH) using dual Montgomery County Campus, Rockville, Maryland 20850, USA * barakk@ee.bgu.ac.il Abstract: Fresnel incoherent Fresnel holography," Opt. Lett. 32(8), 912­914 (2007). 7. J. Rosen and G. Brooker, "Fluorescence

  2. Optimal resolution in Fresnel incoherent correlation holographic fluorescence microscopy

    E-Print Network [OSTI]

    Rosen, Joseph

    Optimal resolution in Fresnel incoherent correlation holographic fluorescence microscopy Gary, Israel 4 rosen@ee.bgu.ac.il *gbrooker@jhu.edu Abstract: Fresnel Incoherent Correlation Holography (FINCH. Rosen and G. Brooker, "Digital spatially incoherent Fresnel holography," Opt. Lett. 32(8), 912­914 (2007

  3. UNIVERSITY OF NEW MEXICO LABOR MANAGEMENT RELATIONS RESOLUTION

    E-Print Network [OSTI]

    New Mexico, University of

    UNIVERSITY OF NEW MEXICO LABOR MANAGEMENT RELATIONS RESOLUTION RELATING TO COLLECTIVE BARGAINING FOR THE UNIVERSITY OF NEW MEXICO; PROVIDING RIGHTS, RESPONSIBILITIES, AND PROCEDURES IN THE EMPLOYMENT RELATIONSHIP BETWEEN EMPLOYEES AND THE EMPLOYER. BE IT ENACTED BY THE BOARD OF REGENTS OF THE UNIVERSITY OF NEW MEXICO

  4. Optical nanolithography with k/15 resolution using bowtie aperture array

    E-Print Network [OSTI]

    Xu, Xianfan

    Optical nanolithography with k/15 resolution using bowtie aperture array Xiaolei Wen · Luis M nanolithography using bowtie apertures with the help of the interferometric- spatial-phase-imaging (ISPI) technique. The ISPI system can detect and control the distance between the bowtie aperture, and photoresist

  5. A High-Resolution Single Nucleotide Polymorphism Genetic Map

    E-Print Network [OSTI]

    Nachman, Michael

    A High-Resolution Single Nucleotide Polymorphism Genetic Map of the Mouse Genome Sagiv Shifman1 humans. Using more than 10,000 single nucleotide polymorphisms evenly spaced across the mouse genome, we nucleotide polymorphism genetic map of the mouse genome. PLoS Biol 4(12): e395. DOI: 10.1371/journal

  6. HYBRID DECADE-MEAN GLOBAL SEA LEVEL WITH MESOSCALE RESOLUTION

    E-Print Network [OSTI]

    HYBRID DECADE-MEAN GLOBAL SEA LEVEL WITH MESOSCALE RESOLUTION Nikolai A. Maximenko1 and Pearn P of twin-satellite mission GRACE and mesoscale sea level tilt derived from the momentum balance as seen 55 #12;sea level exhibits excellent accuracy on mesoscale, but may contain significant systematic

  7. Probe for high resolution NMR with sample reorientation

    DOE Patents [OSTI]

    Pines, Alexander (Berkeley, CA); Samoson, Ago (Tallinn, SU)

    1990-01-01T23:59:59.000Z

    An improved NMR probe and method are described which substantially improve the resolution of NMR measurements made on powdered or amorphous or otherwise orientationally disordered samples. The apparatus mechanically varies the orientation of the sample such that the time average of two or more sets of spherical harmonic functions are zero.

  8. Probe for high resolution NMR with sample reorientation

    DOE Patents [OSTI]

    Pines, A.; Samoson, A.

    1990-02-06T23:59:59.000Z

    An improved NMR probe and method are described which substantially improve the resolution of NMR measurements made on powdered or amorphous or otherwise orientationally disordered samples. The apparatus mechanically varies the orientation of the sample such that the time average of two or more sets of spherical harmonic functions are zero. 8 figs.

  9. accident draft resolution: Topics by E-print Network

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

    accident draft resolution First Page Previous Page 1 2 3 4 5 6 7 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 CLASNote95Draft Spatial...

  10. Optimization Online Moderation Policy

    E-Print Network [OSTI]

    Optimization Online Copyright Policy Copyright Policy By submitting a paper, all authors of the paper agree that other users of Optimization Online can download

  11. Collimator application for microchannel plate image intensifier resolution improvement

    DOE Patents [OSTI]

    Thomas, Stanley W. (Livermore, CA)

    1996-02-27T23:59:59.000Z

    A collimator is included in a microchannel plate image intensifier (MCPI). Collimators can be useful in improving resolution of MCPIs by eliminating the scattered electron problem and by limiting the transverse energy of electrons reaching the screen. Due to its optical absorption, a collimator will also increase the extinction ratio of an intensifier by approximately an order of magnitude. Additionally, the smooth surface of the collimator will permit a higher focusing field to be employed in the MCP-to-collimator region than is currently permitted in the MCP-to-screen region by the relatively rough and fragile aluminum layer covering the screen. Coating the MCP and collimator surfaces with aluminum oxide appears to permit additional significant increases in the field strength, resulting in better resolution.

  12. Resolutions of Problems that Occurred in SPEAR3 Magnet Production

    SciTech Connect (OSTI)

    Li, Nanyang

    2005-05-27T23:59:59.000Z

    Some problems occurred during the SPEAR3 magnet production at IHEP, China. It was very hard to find resolution from existing knowledge of those problems. It was possible that similar problems might have happen in building accelerator magnet in other institutes before, but they were not addressed in public papers. These problems were discussed and solved by engineers from both SLAC and IHEP after conducting certain experiments. Traditionally, the magnet design and measurement data have been always well documented and addressed in papers, but the production experiences have not been recorded adequately. It is the goal of this paper to record the problems and their resolutions during SPEAR3 magnet production at IHEP China, which will certainly benefit future magnet projects.

  13. High resolution reservoir geological modelling using outcrop information

    SciTech Connect (OSTI)

    Zhang Changmin; Lin Kexiang; Liu Huaibo [Jianghan Petroleum Institute, Hubei (China)] [and others

    1997-08-01T23:59:59.000Z

    This is China`s first case study of high resolution reservoir geological modelling using outcrop information. The key of the modelling process is to build a prototype model and using the model as a geological knowledge bank. Outcrop information used in geological modelling including seven aspects: (1) Determining the reservoir framework pattern by sedimentary depositional system and facies analysis; (2) Horizontal correlation based on the lower and higher stand duration of the paleo-lake level; (3) Determining the model`s direction based on the paleocurrent statistics; (4) Estimating the sandbody communication by photomosaic and profiles; (6) Estimating reservoir properties distribution within sandbody by lithofacies analysis; and (7) Building the reservoir model in sandbody scale by architectural element analysis and 3-D sampling. A high resolution reservoir geological model of Youshashan oil field has been built by using this method.

  14. HIGH SPATIAL RESOLUTION OBSERVATIONS OF LOOPS IN THE SOLAR CORONA

    SciTech Connect (OSTI)

    Brooks, David H.; Ugarte-Urra, Ignacio [College of Science, George Mason University, 4400 University Drive, Fairfax, VA 22030 (United States); Warren, Harry P. [Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States); Winebarger, Amy R. [NASA Marshall Space Flight Center, ZP 13, Huntsville, AL 35812 (United States)

    2013-08-01T23:59:59.000Z

    Understanding how the solar corona is structured is of fundamental importance to determine how the Sun's upper atmosphere is heated to high temperatures. Recent spectroscopic studies have suggested that an instrument with a spatial resolution of 200 km or better is necessary to resolve coronal loops. The High Resolution Coronal Imager (Hi-C) achieved this performance on a rocket flight in 2012 July. We use Hi-C data to measure the Gaussian widths of 91 loops observed in the solar corona and find a distribution that peaks at about 270 km. We also use Atmospheric Imaging Assembly data for a subset of these loops and find temperature distributions that are generally very narrow. These observations provide further evidence that loops in the solar corona are often structured at a scale of several hundred kilometers, well above the spatial scale of many proposed physical mechanisms.

  15. Wavelength calibration of the JWST-MIRI medium resolution spectrometer

    E-Print Network [OSTI]

    Martinez-Galarza, J R; Hernan-Caballero, A; Azzollini, R; Glasse, A; Kendrew, S; Brandl, B; Lahuis, F

    2010-01-01T23:59:59.000Z

    We present the wavelength and spectral resolution characterisation of the Integral Field Unit (IFU) Medium Resolution Spectrometer for the Mid-InfraRed Instrument (MIRI), to fly onboard the James Webb Space Telescope in 2014. We use data collected using the Verification Model of the instrument and develop an empirical method to calibrate properties such as wavelength range and resolving power in a portion of the spectrometer's full spectral range (5-28 microns). We test our results against optical models to verify the system requirements and combine them with a study of the fringing pattern in the instrument's detector to provide a more accurate calibration. We show that MIRI's IFU spectrometer will be able to produce spectra with a resolving power above R=2800 in the wavelength range 6.46-7.70 microns, and that the unresolved spectral lines are well fitted by a Gaussian profile.

  16. Automated analysis for microcalcifications in high resolution digital mammograms

    DOE Patents [OSTI]

    Mascio, Laura N. (Dublin, CA)

    1996-01-01T23:59:59.000Z

    A method for automatically locating microcalcifications indicating breast cancer. The invention assists mammographers in finding very subtle microcalcifications and in recognizing the pattern formed by all the microcalcifications. It also draws attention to microcalcifications that might be overlooked because a more prominent feature draws attention away from an important object. A new filter has been designed to weed out false positives in one of the steps of the method. Previously, iterative selection threshold was used to separate microcalcifications from the spurious signals resulting from texture or other background. A Selective Erosion or Enhancement (SEE) Filter has been invented to improve this step. Since the algorithm detects areas containing potential calcifications on the mammogram, it can be used to determine which areas need be stored at the highest resolution available, while, in addition, the full mammogram can be reduced to an appropriate resolution for the remaining cancer signs.

  17. Automated analysis for microcalcifications in high resolution digital mammograms

    DOE Patents [OSTI]

    Mascio, L.N.

    1996-12-17T23:59:59.000Z

    A method is disclosed for automatically locating microcalcifications indicating breast cancer. The invention assists mammographers in finding very subtle microcalcifications and in recognizing the pattern formed by all the microcalcifications. It also draws attention to microcalcifications that might be overlooked because a more prominent feature draws attention away from an important object. A new filter has been designed to weed out false positives in one of the steps of the method. Previously, iterative selection threshold was used to separate microcalcifications from the spurious signals resulting from texture or other background. A Selective Erosion or Enhancement (SEE) Filter has been invented to improve this step. Since the algorithm detects areas containing potential calcifications on the mammogram, it can be used to determine which areas need be stored at the highest resolution available, while, in addition, the full mammogram can be reduced to an appropriate resolution for the remaining cancer signs. 8 figs.

  18. Higher signal harmonics, LISA's angular resolution, and dark energy

    E-Print Network [OSTI]

    K. G. Arun; Bala R. Iyer; B. S. Sathyaprakash; Siddhartha Sinha; Chris Van Den Broeck

    2007-10-24T23:59:59.000Z

    It is generally believed that the angular resolution of the Laser Interferometer Space Antenna (LISA) for binary supermassive black holes (SMBH) will not be good enough to identify the host galaxy or galaxy cluster. This conclusion, based on using only the dominant harmonic of the binary SMBH signal, changes substantially when higher signal harmonics are included in assessing the parameter estimation problem. We show that in a subset of the source parameter space the angular resolution increases by more than a factor of 10, thereby making it possible for LISA to identify the host galaxy/galaxy cluster. Thus, LISA's observation of certain binary SMBH coalescence events could constrain the dark energy equation of state to within a few percent, comparable to the level expected from other dark energy missions.

  19. Turbine component casting core with high resolution region

    DOE Patents [OSTI]

    Kamel, Ahmed; Merrill, Gary B.

    2014-08-26T23:59:59.000Z

    A hollow turbine engine component with complex internal features can include a first region and a second, high resolution region. The first region can be defined by a first ceramic core piece formed by any conventional process, such as by injection molding or transfer molding. The second region can be defined by a second ceramic core piece formed separately by a method effective to produce high resolution features, such as tomo lithographic molding. The first core piece and the second core piece can be joined by interlocking engagement that once subjected to an intermediate thermal heat treatment process thermally deform to form a three dimensional interlocking joint between the first and second core pieces by allowing thermal creep to irreversibly interlock the first and second core pieces together such that the joint becomes physically locked together providing joint stability through thermal processing.

  20. The Angular Resolution of Space-Based Gravitational Wave Detectors

    E-Print Network [OSTI]

    Thomas A. Moore; Ronald W. Hellings

    2000-06-08T23:59:59.000Z

    Proposed space-based gravitational wave antennas involve satellites arrayed either in an equilateral triangle around the earth in the ecliptic plane (the ecliptic-plane option) or in an equilateral triangle orbiting the sun in such a way that the plane of the triangle is tilted at 60 degrees relative to the ecliptic (the precessing-plane option). In this paper, we explore the angular resolution of these two classes of detectors for two kinds of sources (essentially monochromatic compact binaries and coalescing massive-black-hole binaries) using time-domain expressions for the gravitational waveform that are accurate to 4/2 PN order. Our results display an interesting effect not previously reported in the literature, and underline the importance of including the higher-order PN terms in the waveform when predicting the angular resolution of ecliptic-plane detector arrays.

  1. INTERACTIONS BETWEEN MODERATE- AND LONG-PERIOD GIANT PLANETS: SCATTERING EXPERIMENTS FOR SYSTEMS IN ISOLATION AND WITH STELLAR FLYBYS

    SciTech Connect (OSTI)

    Boley, Aaron C.; Payne, Matthew J.; Ford, Eric B. [Department of Astronomy, University of Florida, 211 Bryant Space Science Center, P.O. Box 112055, Gainesville, FL 32611 (United States)

    2012-07-20T23:59:59.000Z

    The chance that a planetary system will interact with another member of its host star's nascent cluster would be greatly increased if gas giant planets form in situ on wide orbits. In this paper, we explore the outcomes of planet-planet scattering for a distribution of multi-planet systems that all have one of the planets on an initial orbit of 100 AU. The scattering experiments are run with and without stellar flybys. We convolve the outcomes with distributions for protoplanetary disk and stellar cluster sizes to generalize the results where possible. We find that the frequencies of large mutual inclinations and high eccentricities are sensitive to the number of planets in a system, but not strongly to stellar flybys. However, flybys do play a role in changing the low and moderate portions of the mutual inclination distributions, and erase dynamically cold initial conditions on average. Wide-orbit planets can be mixed throughout the planetary system, and in some cases, can potentially become hot Jupiters, which we demonstrate using scattering experiments that include a tidal damping model. If planets form in situ on wide orbits, then there will be discernible differences in the proper-motion distributions of a sample of wide-orbit planets compared with a pure scattering formation mechanism. Stellar flybys can enhance the frequency of ejections in planetary systems, but autoionization is likely to remain the dominant source of free-floating planets.

  2. Analysis and results of a hydrogen-moderated isotope production assembly in the Fast Flux Test Facility

    SciTech Connect (OSTI)

    Wootan, D.W.; Rawlins, J.A.; Carter, L.L.; Brager, H.R.; Schenter, R.E. (Westinghouse Hanford Co., Richland, WA (USA))

    1989-10-01T23:59:59.000Z

    This paper reports on a cobalt test assembly containing yttrium hydride pins for neutron moderation irradiated in the Fast Flux Test Facility (FFTF) during cycle 9A for 137.7 equivalent full-power days at a power level of 291 MW. The 36 test pins consisted of a batch of 32 pins containing cobalt metal used to produce {sup 60}Co and a set of four pins with europium oxide to produce {sup 153}Gd, a radioisotope used in detection of the bone disease osteoporosis. Postirradiation examination of the cobalt pins determined the {sup 60}Co production to be predictable to an accuracy of {approximately} 5%. The measured {sup 60}Co spatially distributed concentrations were within 20% of the calculated concentrations. The assembly average {sup 60}Co measured activity was 4% less than the calculated value. The europium oxide pins were gamma scanned for the europium isotopes {sup 152}Eu and {sup 154}Eu to an absolute accuracy of {approx equal} 10%. The measured europium radioisotope and {sup 153}Gd concentrations were within 20% of calculated values. The hydride assembly performed well and is an excellent vehicle for many FFTF isotope production applications. The results also demonstrate the accuracy of the calculational methods developed by the Westinghouse Hanford Company for predicting isotope production rates in this type of assembly.

  3. Seismicity and seismic response of the Soviet-designed VVER (Water-cooled, Water moderated Energy Reactor) reactor plants

    SciTech Connect (OSTI)

    Ma, D.C.; Gvildys, J.; Wang, C.Y.; Spencer, B.W.; Sienicki, J.J.; Seidensticker, R.W.; Purvis, E.E. III

    1989-01-01T23:59:59.000Z

    On March 4, 1977, a strong earthquake occurred at Vrancea, Romania, about 350 km from the Kozloduy plant in Bulgaria. Subsequent to this event, construction of the unit 2 of the Armenia plant was delayed over two years while seismic features were added. On December 7, 1988, another strong earthquake struck northwest Armenia about 90 km north of the Armenia plant. Extensive damage of residential and industrial facilities occurred in the vicinity of the epicenter. The earthquake did not damage the Armenia plant. Following this event, the Soviet government announced that the plant would be shutdown permanently by March 18, 1989, and the station converted to a fossil-fired plant. This paper presents the results of the seismic analyses of the Soviet-designed VVER (Water-cooled, Water moderated Energy Reactor) plants. Also presented is the information concerning seismicity in the regions where VVERs are located and information on seismic design of VVERs. The reference units are the VVER-440 model V230 (similar to the two units of the Armenia plant) and the VVER-1000 model V320 units at Kozloduy in Bulgaria. This document provides an initial basis for understanding the seismicity and seismic response of VVERs under seismic events. 1 ref., 9 figs., 3 tabs.

  4. An economic analysis of a light and heavy water moderated reactor synergy: burning americium using recycled uranium

    SciTech Connect (OSTI)

    Wojtaszek, D.; Edwards, G. [Atomic Energy of Canada Ltd., Chalk River Laboratories, Chalk River, Ontario (Canada)

    2013-07-01T23:59:59.000Z

    An economic analysis is presented for a proposed synergistic system between 2 nuclear utilities, one operating light water reactors (LWR) and another running a fleet of heavy water moderated reactors (HWR). Americium is partitioned from LWR spent nuclear fuel (SNF) to be transmuted in HWRs, with a consequent averted disposal cost to the LWR operator. In return, reprocessed uranium (RU) is supplied to the HWRs in sufficient quantities to support their operation both as power generators and americium burners. Two simplifying assumptions have been made. First, the economic value of RU is a linear function of the cost of fresh natural uranium (NU), and secondly, plutonium recycling for a third utility running a mixed oxide (MOX) fuelled reactor fleet has been already taking place, so that the extra cost of americium recycling is manageable. We conclude that, in order for this scenario to be economically attractive to the LWR operator, the averted disposal cost due to partitioning americium from LWR spent fuel must exceed 214 dollars per kg, comparable to estimates of the permanent disposal cost of the high level waste (HLW) from reprocessing spent LWR fuel. (authors)

  5. High-resolution SIMS depth profiling of nanolayers.

    SciTech Connect (OSTI)

    Baryshev, S. V.; Zinovev, A. V.; Tripa, C. E.; Pellin, M. J.; Peng, Q.; Elam, J. W.; Veryovkin, I. V. (Energy Systems); ( MSD)

    2012-10-15T23:59:59.000Z

    Although the fundamental physical limits for depth resolution of secondary ion mass spectrometry are well understood in theory, the experimental work to achieve and demonstrate them is still ongoing. We report results of high-resolution TOF SIMS (time-of-flight secondary ion mass spectrometry) depth profiling experiments on a nanolayered structure, a stack of 16 alternating MgO and ZnO {approx}5.5 nm layers grown on a Si substrate by atomic layer deposition. The measurements were performed using a newly developed approach implementing a low-energy direct current normally incident Ar{sup +} ion beam for ion milling (250 eV and 500 eV energy), in combination with a pulsed 5 keV Ar{sup +} ion beam at 60{sup o} incidence for TOF SIMS analysis. By this optimized arrangement, a noticeably improved version of the dual-beam (DB) approach to TOF SIMS depth profiling is introduced, which can be dubbed gentleDB. The mixing-roughness-information model was applied to detailed analysis of experimental results. It revealed that the gentleDB approach allows ultimate depth resolution by confining the ion beam mixing length to about two monolayers. This corresponds to the escape depth of secondary ions, the fundamental depth resolution limitation in SIMS. Other parameters deduced from the measured depth profiles indicated that a single layer thickness is equal to 6 nm so that the 'flat' layer thickness d is 3 nm and the interfacial roughness {sigma} is 1.5 nm, thus yielding d + 2{sigma} = 6 nm. We have demonstrated that gentleDB TOF SIMS depth profiling with noble gas ion beams is capable of revealing the structural features of a stack of nanolayers, resolving its original surface and estimating the roughness of interlayer interfaces, information which is difficult to obtain by traditional approaches.

  6. A high resolution cavity BPM for the CLIC Test Facility

    E-Print Network [OSTI]

    Chritin, N; Soby, L; Lunin, A; Solyak, N; Wendt, M; Yakovlev, V

    2012-01-01T23:59:59.000Z

    In frame of the development of a high resolution BPM system for the CLIC Main Linac we present the design of a cavity BPM prototype. It consists of a waveguide loaded dipole mode resonator and a monopole mode reference cavity, both operating at 15 GHz, to be compatible with the bunch frequencies at the CLIC Test Facility. Requirements, design concept, numerical analysis, and practical considerations are discussed.

  7. High-resolution NMR process analyzer for oxygenates in gasoline

    SciTech Connect (OSTI)

    Skloss, T.W.; Kim, A.J.; Haw, J.F. (Texas A M Univ., College Station, TX (United States))

    1994-02-15T23:59:59.000Z

    We report a high-resolution 42-MHz[sup 1]HFT-NMR instrument that is suitable for use as a process analyzer and demonstrate its use in the determination of methyl tert-butyl ether (MTBE) in a flowing stream of gasoline. This spectrometer is based on a 55-kg permanent magnet with essentially no fringe field. A spectral resolution of 3 Hz was typically obtained for spinning samples, and this performance was only slightly degraded with flowing samples. We report a procedure for magnet drift compensation using a software procedure rather than a field-frequency lock channel. This procedure allowed signal averaging without loss of resolution. Regulatory changes to be implemented in the near future have created a need for the development of methods for the determination of MTBE and other oxygenates in reformulated gasolines. Existing methods employing gas chromatography are not fast enough for process control of a gasoline blender and suffer from other limitations. This study demonstrates that process analysis NMR is well-suited to the determination of MTBE in a simulated gasoline blender. The detection limit of 0.5 vol % MTBE was obtained with a measurement time of 1 min. The absolute standard deviation of independent determinations was 0.17% when the MTBE concentration was 10%, a nominal value. Preliminary results also suggest that the method may be applicable to gasolines containing mixtures of oxygenate additives as well as the measurement of aromatic and olefinic hydrogens. 33 refs., 9 figs.

  8. Resolution of a High Performance Cavity Beam Position Monitor System

    SciTech Connect (OSTI)

    Walston, S; Chung, C; Fitsos, P; Gronberg, J; Ross, M; Khainovski, O; Kolomensky, Y; Loscutoff, P; Slater, M; Thomson, M; Ward, D; Boogert, S; Vogel, V; Meller, R; Lyapin, A; Malton, S; Miller, D; Frisch, J; Hinton, S; May, J; McCormick, D; Smith, S; Smith, T; White, G; Orimoto, T; Hayano, H; Honda, Y; Terunuma, N; Urakawa, J

    2005-09-12T23:59:59.000Z

    International Linear Collider (ILC) interaction region beam sizes and component position stability requirements will be as small as a few nanometers. It is important to the ILC design effort to demonstrate that these tolerances can be achieved - ideally using beam-based stability measurements. It has been estimated that RF cavity beam position monitors (BPMs) could provide position measurement resolutions of less than one nanometer and could form the basis of the desired beam-based stability measurement. We have developed a high resolution RF cavity BPM system. A triplet of these BPMs has been installed in the extraction line of the KEK Accelerator Test Facility (ATF) for testing with its ultra-low emittance beam. A metrology system for the three BPMs was recently installed. This system employed optical encoders to measure each BPM's position and orientation relative to a zero-coefficient of thermal expansion carbon fiber frame and has demonstrated that the three BPMs behave as a rigid-body to less than 5 nm. To date, we have demonstrated a BPM resolution of less than 20 nm over a dynamic range of +/- 20 microns.

  9. Resolution studies and performance evaluation of the LHCb VELO upgrade

    E-Print Network [OSTI]

    Hynds, Daniel Peter McFarlane; Soler, Paul; Parkes, Christopher

    2015-03-25T23:59:59.000Z

    The LHCb detector at CERN is scheduled to undergo an upgrade during the second long shutdown of the LHC. As part of this upgrade, the vertex detector (VELO) will be replaced with a new hybrid pixel detector, based on an evolution of the Timepix ASIC. The performance of this detector should improve upon that achieved by the current VELO, in addition to facilitating the complete detector readout at 40 MHz. As part of the preparation for this upgrade, this thesis presents the results of studies carried out on the single hit resolution of silicon hybrid pixel detectors. The development of a particle beam telescope has been carried out to allow these studies, shown to operate with track rates in excess of 45 kHz and with a pointing resolution at the device under test of less than 2 ?m. A wide range of sensor types, thicknesses and resistivities have then been tested under different operating conditions and the results presented, with single hit resolutions varying between 4 ?m and 12 ?m depending on the conditi...

  10. Resolution of reservoir scale electrical anisotropy from marine CSEM data

    SciTech Connect (OSTI)

    Brown, V.; Hoversten, G.M.; Key, K.; Chen, J.

    2011-10-01T23:59:59.000Z

    A combination of 1D and 3D forward and inverse solutions is used to quantify the sensitivity and resolution of conventional controlled source electromagnetic (CSEM) data collected using a horizontal electric dipole source to transverse electrical anisotropy located in a deep-water exploration reservoir target. Since strongly anisotropic shale layers have a vertical resistivity that can be comparable to many reservoirs, we examine how CSEM can discriminate confounding shale layers through their characteristically lower horizontal resistivity. Forward modeling demonstrates that the sensitivity to reservoir level anisotropy is very low compared to the sensitivity to isotropic reservoirs, especially when the reservoir is deeper than about 2 km below the seabed. However, for 1D models where the number of inversion parameters can be fixed to be only a few layers, both vertical and horizontal resistivity of the reservoir can be well resolved using a stochastic inversion. We find that the resolution of horizontal resistivity increases as the horizontal resistivity decreases. We show that this effect is explained by the presence of strong horizontal current density in anisotropic layers with low horizontal resistivity. Conversely, when the reservoir has a vertical to horizontal resistivity ratio of about 10 or less, the current density is vertically polarized and hence has little sensitivity to the horizontal resistivity. Resistivity anisotropy estimates from 3D inversion for 3D targets suggest that resolution of reservoir level anisotropy for 3D targets will require good a priori knowledge of the background sediment conductivity and structural boundaries.

  11. Thomas, J.R. and Clem, A.W, 1991, PWR moderator temperature coefficient via noise analysis: time series methods, Proceedings of SMORNVI, Gatlinburg, 34.01

    E-Print Network [OSTI]

    Pázsit, Imre

    and Testing Symposium, Knoxville, Tennes­ see 52.01 Uhrig, R.E., 1990, Use of artificial intelligence/Computer Interactions: Nuclear and Beyond, Nash­ ville, Tennessee, 210 Uhrig R.E., 1991, Potential application of neural­ 36 ­ Thomas, J.R. and Clem, A.W, 1991, PWR moderator temperature coefficient via noise analysis

  12. Analysis of the rotational structure in the high-resolution infrared...

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

    rotational structure in the high-resolution infrared spectra of cis,cis- and trans,trans-1,4-difluorobutadiene-1 Analysis of the rotational structure in the high-resolution...

  13. Analysis of the Rotational Structure in the High-Resolution Infrared...

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

    Rotational Structure in the High-Resolution Infrared Spectrum of trans-Hexatriene-1-13C1; a Semiexperimental Analysis of the Rotational Structure in the High-Resolution Infrared...

  14. Accuracy and resolution of shuttle radar topography mission data Bridget Smith and David Sandwell

    E-Print Network [OSTI]

    Sandwell, David T.

    Accuracy and resolution of shuttle radar topography mission data Bridget Smith and David Sandwell: General or miscellaneous. Citation: Smith, B., and D. Sandwell, Accuracy and resolution of shuttle radar

  15. Data disaggregation and evapotranspiration modeling: a synergism between multi-spectral/multi-resolution remote sensing data

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    resolution Imaging Spectroradiometer), respectively. - SEB-1S is a mono-source surface energy balance model-resolution remote sensing data, United States (2013)" #12; transpiration (T). The surface albedo (SA) derived from shortwave reflectances modulates the available energy

  16. Ultra-high Resolution Optics for EUV and Soft X-ray Inelastic Scattering

    E-Print Network [OSTI]

    Voronov, Dmitry L.

    2010-01-01T23:59:59.000Z

    16. Yu. Shvyd’ko, X-Ray Optics, Berlin: Springer-Verlag,Ultra-high Resolution Optics for EUV and Soft X-rayspectral resolution soft x-ray optics. Conventionally in the

  17. Nanoscale organic transistors that use sourcedrain electrodes supported by high resolution rubber stamps

    E-Print Network [OSTI]

    Rogers, John A.

    Nanoscale organic transistors that use sourceŐdrain electrodes supported by high resolution rubber resolution rubber stamps bilayers of two different types of the elastomer polydimethylsiloxane 3,4 by casting

  18. Design and characterization of a nano-Newton resolution thrust stand J. Soni and S. Roy

    E-Print Network [OSTI]

    Roy, Subrata

    Design and characterization of a nano-Newton resolution thrust stand J. Soni and S. Roy Citation-Newton resolution thrust stand J. Soni and S. Roya) Applied Physics Research Group, University of Florida

  19. Development of Advanced Optics and High Resolution Instrumentation for Mass Spectrometry Based Proteomics

    E-Print Network [OSTI]

    Sherrod, Stacy D.

    2010-01-14T23:59:59.000Z

    ) improving the analytical figures of merit (i.e., spatial resolution, analysis time) by implementing a spatially dynamic optical system, and (3) increasing both mass spectral resolution and ion detection sensitivity by modifying a commercial time...

  20. Final report: high resolution lensless 3D imaging of nanostructures with coherent x-rays

    SciTech Connect (OSTI)

    Jacobsen, Chris

    2014-12-07T23:59:59.000Z

    Final report on the project "High resolution lensless 3D imaging of nanostructures with coherent x-rays"

  1. THE SEGUE STELLAR PARAMETER PIPELINE. V. ESTIMATION OF ALPHA-ELEMENT ABUNDANCE RATIOS FROM LOW-RESOLUTION SDSS/SEGUE STELLAR SPECTRA

    SciTech Connect (OSTI)

    Lee, Young Sun; Beers, Timothy C. [Department of Physics and Astronomy and JINA (Joint Institute for Nuclear Astrophysics), Michigan State University, East Lansing, MI 48824 (United States); Prieto, Carlos Allende [Instituto de Astrofisica de Canarias, E-38205 La Laguna, Tenerife (Spain); Lai, David K.; Rockosi, Constance M. [UCO/Lick Observatory, Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States); Morrison, Heather L. [Department of Astronomy, Case Western Reserve University, Cleveland, OH 44106 (United States); Johnson, Jennifer A. [Department of Astronomy, Ohio State University, Columbus, OH 43210 (United States); An, Deokkeun [Department of Science Education, Ewha Womans University, Seoul 120-750 (Korea, Republic of); Sivarani, Thirupathi [Indian Institute of Astrophysics, 2nd block Koramangala, Bangalore 560034 (India); Yanny, Brian, E-mail: lee@pa.msu.edu, E-mail: beers@pa.msu.edu, E-mail: cap@mssl.ucl.ac.uk, E-mail: david@ucolick.org, E-mail: crockosi@ucolikc.org, E-mail: heather@vegemite.case.edu, E-mail: jaj@astronomy.ohio-state.edu, E-mail: deokkeun@ewha.ac.kr, E-mail: sivarani@iiap.res.in, E-mail: yanny@fnal.gov [Fermi National Accelerator Laboratory, Batavia, IL 60510 (United States)

    2011-03-15T23:59:59.000Z

    We present a method for the determination of [{alpha}/Fe] ratios from low-resolution (R = 2000) SDSS/SEGUE stellar spectra. By means of a star-by-star comparison with degraded spectra from the ELODIE spectral library and with a set of moderately high-resolution (R = 15, 000) and medium-resolution (R = 6000) spectra of SDSS/SEGUE stars, we demonstrate that we are able to measure [{alpha}/Fe] from SDSS/SEGUE spectra (with S/N>20/1) to a precision of better than 0.1 dex, for stars with atmospheric parameters in the range T{sub eff} = [4500, 7000] K, log g = [1.5, 5.0], and [Fe/H] = [-1.4, +0.3], over the range [{alpha}/Fe] = [-0.1, +0.6]. For stars with [Fe/H] <-1.4, our method requires spectra with slightly higher signal-to-noise to achieve this precision (S/N>25/1). Over the full temperature range considered, the lowest metallicity star for which a confident estimate of [{alpha}/Fe] can be obtained from our approach is [Fe/H] {approx}-2.5; preliminary tests indicate that a metallicity limit as low as [Fe/H] {approx}-3.0 may apply to cooler stars. As a further validation of this approach, weighted averages of [{alpha}/Fe] obtained for SEGUE spectra of likely member stars of Galactic globular clusters (M15, M13, and M71) and open clusters (NGC 2420, M67, and NGC 6791) exhibit good agreement with the values of [{alpha}/Fe] from previous studies. The results of the comparison with NGC 6791 imply that the metallicity range for the method may extend to {approx}+0.5.

  2. INNER SHELL EXCITATION OF ATOMS AND MOLECULES BY ELECTRON IMPACT WITH HIGH ENERGY RESOLUTION

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    INNER SHELL EXCITATION OF ATOMS AND MOLECULES BY ELECTRON IMPACT WITH HIGH ENERGY RESOLUTION F. H resolution energy loss spectra for inner shell excited states, (2) the observa- tion of inner shell excited are the subject of the present review. The inner shell states that can usefully be studied with energy resolutions

  3. Degradation of resolution in a homogeneous dual readout hadronic calorimeter

    E-Print Network [OSTI]

    Donald E. Groom

    2012-12-26T23:59:59.000Z

    If the response to a hadronic shower in a semi-infinite uniform calorimeter structure is $S$ relative to the electronic response, then $S/E = [\\fem + (1-\\fem)(h/e)]$, where $E$ is the incident hadron energy, $\\fem$ is the electronic shower fraction, and $h/e$ is the hadron/electron response ratio. In conventional calorimeters the energy resolution is dominated by the stochastic variable $\\fem$, whose broad, skewed pdf has an energy-dependent mean. The slow increase of the mean with $E$ is responsible for response nonlinearity and the skewness results in a non-Gaussian response. If the cascade is observed in two channels with different values of $h/e$ (typically scintillator($S$) and Cherenkov ($C$)), $\\fem$ can be eliminated. An energy estimator, linear in $C$ and $S$, is obtained which is proportional to the incident hadron's energy. The resolution depends upon the contrast in $h/e$ between the two channels. The Cherenkov $h/e$ will be 0.20--0.25. In sampling calorimeters, $h/e$ can be increased to about 0.7 by arranging for preferential absorption of the electromagnetic (EM) shower energy in the absorber (decreasing $e$) and using a hydrogenous detector (organic scintillator) to enhance $h$ through the contribution of recoil protons in $n$--$p$ scattering. Neither mechanism is available in a homogeneous crystal or glass scintillator,\\rm where $h/e$is expected to be in the vicinity of 0.4 because of invisible hadronic energy loss and other effects. The $h/e$ contrast is very likely too small to provide the needed energy resolution. We support this conclusion with simple Monte Carlo simulations.

  4. High-level waste issues and resolutions document

    SciTech Connect (OSTI)

    Not Available

    1994-05-01T23:59:59.000Z

    The High-Level Waste (HLW) Issues and Resolutions Document recognizes US Department of Energy (DOE) complex-wide HLW issues and offers potential corrective actions for resolving these issues. Westinghouse Management and Operations (M&O) Contractors are effectively managing HLW for the Department of Energy at four sites: Idaho National Engineering Laboratory (INEL), Savannah River Site (SRS), West Valley Demonstration Project (WVDP), and Hanford Reservation. Each site is at varying stages of processing HLW into a more manageable form. This HLW Issues and Resolutions Document identifies five primary issues that must be resolved in order to reach the long-term objective of HLW repository disposal. As the current M&O contractor at DOE`s most difficult waste problem sites, Westinghouse recognizes that they have the responsibility to help solve some of the complexes` HLW problems in a cost effective manner by encouraging the M&Os to work together by sharing expertise, eliminating duplicate efforts, and sharing best practices. Pending an action plan, Westinghouse M&Os will take the initiative on those corrective actions identified as the responsibility of an M&O. This document captures issues important to the management of HLW. The proposed resolutions contained within this document set the framework for the M&Os and DOE work cooperatively to develop an action plan to solve some of the major complex-wide problems. Dialogue will continue between the M&Os, DOE, and other regulatory agencies to work jointly toward the goal of storing, treating, and immobilizing HLW for disposal in an environmentally sound, safe, and cost effective manner.

  5. 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.

  6. POWERWALL: International Workshop on Interactive, Ultra-High-Resolution Displays

    SciTech Connect (OSTI)

    Rooney, Chris; Endert, Alexander; Fekete, Jean-Daniel; Hornbaek, Kasper; North, Chris

    2013-04-27T23:59:59.000Z

    Ultra-high-resolution (Powerwall) displays are becoming increasingly popular due to the ever decreasing cost of hardware. As a result they are appearing more frequently in research institutes, and making the jump out of the lab and into industry. Due to the amount of work in this research area that has been published in CHI over the last few years, we felt that this confernece would be the ideal host for the first opportunity for both academics and practitioners in this field to get together.

  7. Local Optical Spectroscopies for Subnanometer Spatial Resolution Chemical Imaging

    SciTech Connect (OSTI)

    Weiss, Paul

    2014-01-20T23:59:59.000Z

    The evanescently coupled photon scanning tunneling microscopes (STMs) have special requirements in terms of stability and optical access. We have made substantial improvements to the stability, resolution, and noise floor of our custom-built visible-photon STM, and will translate these advances to our infrared instrument. Double vibration isolation of the STM base with a damping system achieved increased rigidity, giving high tunneling junction stability for long-duration and high-power illumination. Light frequency modulation with an optical chopper and phase-sensitive detection now enhance the signal-to-noise ratio of the tunneling junction during irradiation.

  8. Ultrahigh resolution multicolor colocalization of single fluorescent probes

    DOE Patents [OSTI]

    Weiss, Shimon; Michalet, Xavier; Lacoste, Thilo D.

    2005-01-18T23:59:59.000Z

    A novel optical ruler based on ultrahigh-resolution colocalization of single fluorescent probes is described. Two unique families of fluorophores are used, namely energy-transfer fluorescent beads and semiconductor nanocrystal (NC) quantum dots, that can be excited by a single laser wavelength but emit at different wavelengths. A novel multicolor sample-scanning confocal microscope was constructed which allows one to image each fluorescent light emitter, free of chromatic aberrations, by scanning the sample with nanometer scale steps using a piezo-scanner. The resulting spots are accurately localized by fitting them to the known shape of the excitation point-spread-function of the microscope.

  9. Resolution-independent surface rendering using programmable graphics hardware

    DOE Patents [OSTI]

    Loop, Charles T. (Bellevue, WA); Blinn, James Frederick (Bellevue, WA)

    2008-12-16T23:59:59.000Z

    Surfaces defined by a Bezier tetrahedron, and in particular quadric surfaces, are rendered on programmable graphics hardware. Pixels are rendered through triangular sides of the tetrahedra and locations on the shapes, as well as surface normals for lighting evaluations, are computed using pixel shader computations. Additionally, vertex shaders are used to aid interpolation over a small number of values as input to the pixel shaders. Through this, rendering of the surfaces is performed independently of viewing resolution, allowing for advanced level-of-detail management. By individually rendering tetrahedrally-defined surfaces which together form complex shapes, the complex shapes can be rendered in their entirety.

  10. Spatial resolution of temperature and chemical species in a flame

    E-Print Network [OSTI]

    Albahadily, Fakhrildeen Niema

    1984-01-01T23:59:59.000Z

    by Winefordner et al. (51). AE . /k A. g. I. B. ln ~ + ln ? + 1n? 1 A. g. i B. (36) where: subscript i = the level excited by the source subscript j = the thermally assisted level flame temperature AE . . ij the difference in energy between i and j.... Schweikert (Member) Abdel-Kad Ayou (Memb ) Vaneica . Y ng (Member) May 1984 ABSTRACT Spatial Resolution of Temperature and Chemical Species in a Flame. (May 1984) Fakhrildeen Niema Albahadily, B. S. , University of Basrah/Iraq Chairman of Advisory...

  11. Single-shot 35 fs temporal resolution electron shadowgraphy

    SciTech Connect (OSTI)

    Scoby, C. M.; Li, R. K.; Threlkeld, E.; To, H.; Musumeci, P. [Department of Physics and Astronomy, UCLA, Los Angeles, California 90095 (United States)] [Department of Physics and Astronomy, UCLA, Los Angeles, California 90095 (United States)

    2013-01-14T23:59:59.000Z

    We obtain single-shot time-resolved shadowgraph images of the electromagnetic fields resulting from the interaction of a high intensity ultrashort laser pulse with a metal surface. Using a high brightness relativistic electron beam and a high streaking speed radiofrequency deflector, we report <35 fs temporal resolution enabling a direct visualization of the retarded-time dominated field evolution which follows the laser-induced charge emission. A model including the finite signal propagation speed well reproduces the data and yields measurements of fundamental parameters in short pulse laser-matter interaction such as the amount of emitted charge and the emission time scale.

  12. Toroidal magnetic detector for high resolution measurement of muon momenta

    DOE Patents [OSTI]

    Bonanos, P.

    1992-01-07T23:59:59.000Z

    A muon detector system including central and end air-core superconducting toroids and muon detectors enclosing a central calorimeter/detector. Muon detectors are positioned outside of toroids and all muon trajectory measurements are made in a nonmagnetic environment. Internal support for each magnet structure is provided by sheets, located at frequent and regularly spaced azimuthal planes, which interconnect the structural walls of the toroidal magnets. In a preferred embodiment, the shape of the toroidal magnet volume is adjusted to provide constant resolution over a wide range of rapidity. 4 figs.

  13. High-resolution radio observations of X-ray binaries

    E-Print Network [OSTI]

    James Miller-Jones

    2008-09-15T23:59:59.000Z

    I present an overview of important results obtained using high-resolution very long baseline interferometry (VLBI) observations of X-ray binary systems. These results derive from both astrometric observations and resolved imaging of sources, from black holes to neutron star and even white dwarf systems. I outline a number of upcoming developments in instrumentation, both new facilities and ongoing upgrades to existing VLBI instruments, and I conclude by identifying a number of important areas of investigation where VLBI will be crucial in advancing our understanding of X-ray binaries.

  14. Compact high resolution isobar separator for study of exotic decays

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power Administration would like submit the followingth Lomonosov1Compact high resolution isobar

  15. Drilling Addendum to Resource Assessment of Low- and Moderate-Temperature Geothermal Waters in Calistoga, Napa County, California

    SciTech Connect (OSTI)

    Taylor, Gary C.; Bacon, C. Forrest; Chapman, Rodger H.; Chase, Gordon W.; Majmundar, Hasmukhrai H.

    1981-05-01T23:59:59.000Z

    This addendum report presents the results of the California Division of Mines and Geology (CDMG) drilling program at Calistoga, California, which was the final geothermal-resource assessment investigation performed under terms of the second year contract (1979-80) between the U.S. Department of Energy (DOE) and the CDMG under the State Coupled Program. This report is intended to supplement information presented in CDMG's technical report for the project year, ''Resource Assessment of Low- and Moderate-Temperature Geothermal Waters in Calistoga, Napa County, California''. During the investigative phase of the CDMG's Geothermal Project, over 200 well-driller's reports were obtained from the Department of Water Resources (DWR). It was hoped that the interpretation and correlation of these logs would reveal the subsurface geology of the Upper Napa Valley and also provide a check for the various geophysical surveys that were performed in the course of the study. However, these DWR driller logs proved to be inadequate due to the brief, non-technical, and erroneous descriptions contained on the logs. As a result of the lack of useable drill-hole data, and because information was desired from,deeper horizons, it became evident that drilling some exploratory holes would be necessary in order to obtain physical evidence of the stratigraphy and aquifers in the immediate Calistoga area. Pursuant to this objective, a total of twelve sites were selected--four under jurisdiction of Napa County and eight under jurisdiction of the City of Calistoga. A moratorium is currently in existence within Napa County on most geothermal drilling, and environmental and time constraints precluded CDMG from obtaining the necessary site permits within the county. However, a variance was applied for and obtained from the City of Calistoga to allow CDMG to drill within the city limits. With this areal constraint and also funding limits in mind, six drilling sites were selected on the basis of (1) proximity to areas where geophysical surveys had been performed, (2) accessibility of the site for drill rig setup, and (3) favorability for obtaining the maximum information possible concerning the geology and the resources. Necessary landowner permission and permits were secured for these sites, and actual drilling began on December 17, 1980. Drilling was terminated on February 4, 1981, with the completion of three holes that ranged in depth from 205 to 885 feet. Use of a relatively new drilling technique called the Dual Tube Method enabled the collection of precise subsurface data of a level of detail never before obtained in the Calistoga area. As a result, a totally new and unexpected picture of the geothermal reservoir conditions there has been obtained, and is outlined in this addendum report.

  16. Atomic Resolution Coherent Diffractive Imaging and Ultrafast Science

    SciTech Connect (OSTI)

    Zuo, Jian-min (University of Illinois) [University of Illinois

    2011-01-12T23:59:59.000Z

    A major scientific challenge is determining the 3-D atomic structure of small nanostructures, including single molecules. Coherent diffractive imaging (CDI) is a promising approach. Recent progress has demonstrated coherent diffraction patterns can be recorded from individual nanostructures and phased to reconstruct their structure. However, overcoming the dose limit imposed by radiation damage is a major obstacle toward the full potential of CDI. One approach is to use ultrafast x-ray or electron pulses. In electron diffraction, amplitudes recorded in a diffraction pattern are unperturbed by lens aberrations, defocus, and other microscope resolution-limiting factors. Sub-A signals are available beyond the information limit of direct imaging. Significant contrast improvement is obtained compared to high-resolution electron micrographs. progress has also been made in developing time-resolved electron diffraction and imaging for the study of ultrafast dynamic processes in materials. This talk will cover these crosscutting issues and the convergence of electron and x-ray diffraction techniques toward structure determination of single molecules.

  17. Subcell resolution in simplex stochastic collocation for spatial discontinuities

    SciTech Connect (OSTI)

    Witteveen, Jeroen A.S., E-mail: jeroen.witteveen@cwi.nl [Center for Turbulence Research, Stanford University, Building 500, Stanford, CA 94305-3035 (United States); Center for Mathematics and Computer Science (CWI), Science Park 123, 1098XG Amsterdam (Netherlands); Iaccarino, Gianluca, E-mail: jops@stanford.edu [Center for Turbulence Research, Stanford University, Building 500, Stanford, CA 94305-3035 (United States)] [Center for Turbulence Research, Stanford University, Building 500, Stanford, CA 94305-3035 (United States)

    2013-10-15T23:59:59.000Z

    Subcell resolution has been used in the Finite Volume Method (FVM) to obtain accurate approximations of discontinuities in the physical space. Stochastic methods are usually based on local adaptivity for resolving discontinuities in the stochastic dimensions. However, the adaptive refinement in the probability space is ineffective in the non-intrusive uncertainty quantification framework, if the stochastic discontinuity is caused by a discontinuity in the physical space with a random location. The dependence of the discontinuity location in the probability space on the spatial coordinates then results in a staircase approximation of the statistics, which leads to first-order error convergence and an underprediction of the maximum standard deviation. To avoid these problems, we introduce subcell resolution into the Simplex Stochastic Collocation (SSC) method for obtaining a truly discontinuous representation of random spatial discontinuities in the interior of the cells discretizing the probability space. The presented SSC–SR method is based on resolving the discontinuity location in the probability space explicitly as function of the spatial coordinates and extending the stochastic response surface approximations up to the predicted discontinuity location. The applications to a linear advection problem, the inviscid Burgers’ equation, a shock tube problem, and the transonic flow over the RAE 2822 airfoil show that SSC–SR resolves random spatial discontinuities with multiple stochastic and spatial dimensions accurately using a minimal number of samples.

  18. Understanding the Poor Resolution from Test Beam RunUnderstanding the Poor Resolution from Test Beam Run 2004 Straw Test beam results2004 Straw Test beam results

    E-Print Network [OSTI]

    1 Understanding the Poor Resolution from Test Beam RunUnderstanding the Poor Resolution from Test Beam Run aah #12;2 2004 Straw Test beam results2004 Straw Test beam results ! Doc # 3308 v#3 by A. Ledovskoy " Using Data from 2004 Test Beam " Used "triplet" method for beam nominally perpendicular to Straw

  19. Identifying and describing strategies to increase self-esteem in students aged 16-22 with mild to moderate mental retardation

    E-Print Network [OSTI]

    DeHart, Martha Roberts

    1992-01-01T23:59:59.000Z

    during the grades 8-12; or in the case of students with disabilities, pupils aged 16-22 ~S -e~- a confidence or satisfaction in oneself; self-respect St w' ? students identified as those with disabilities receiving special education services v ca... used for students aged 16-22 with mild to moderate mental retardation. To accomplish this purpose, a survey questionnaire was mailed to Vocational Adjustment Coordinators within the state of Texas. The sample consisted of all 220 members...

  20. A nuclear criticality safety assessment of the loss of moderation control in 2 1/2 and 10-ton cylinders containing enriched UF{sub 6}

    SciTech Connect (OSTI)

    Newvahner, R.L. [Martin Marietta Energy Systems, Inc., Piketon, OH (United States); Pryor, W.A. [PAI Corp., Oak Ridge, TN (United States)

    1991-12-31T23:59:59.000Z

    Moderation control for maintaining nuclear criticality safety in 2 {1/2}-ton, 10-ton, and 14-ton cylinders containing enriched uranium hexafluoride (UF{sub 6}) has been used safely within the nuclear industry for over thirty years, and is dependent on cylinder integrity and containment. This assessment evaluates the loss of moderation control by the breaching of containment and entry of water into the cylinders. The first objective of this study was to estimate the required amounts of water entering these large UF{sub 6} cylinders to react with, and to moderate the uranium compounds sufficiently to cause criticality. Hypothetical accident situations were modeled as a uranyl fluoride (UO{sub 2}F{sub 2}) slab above a UF{sub 6} hemicylinder, and a UO{sub 2}F{sub 2} sphere centered within a UF{sub 6} hemicylinder. These situations were investigated by computational analyses utilizing the KENO V.a Monte Carlo Computer Code. The results were used to estimate both the masses of water required for criticality, and the limiting masses of water that could be considered safe. The second objective of the assessment was to calculate the time available for emergency control actions before a criticality would occur, i.e., a {open_quotes}safetime{close_quotes}, for various sources of water and different size openings in a breached cylinder. In the situations considered, except the case for a fire hose, the safetime appears adequate for emergency control actions. The assessment shows that current practices for handling moderation controlled cylinders of low enriched UF{sub 6}, along with the continuation of established personnel training programs, ensure nuclear criticality safety for routine and emergency operations.

  1. High resolution ion Doppler spectroscopy at Prairie View Rotamak

    SciTech Connect (OSTI)

    Houshmandyar, Saeid; Yang Xiaokang [Solar Observatory Department, Prairie View A and M University, Prairie View, Texas 77446 (United States); Magee, Richard [Department of Physics, West Virginia University, Morgantown, West Virginia 26506 (United States)

    2012-10-15T23:59:59.000Z

    A fast ion Doppler spectroscopy (IDS) diagnostic system is installed on the Prairie View Rotamak to measure ion temperature and plasma flow. The diagnostic employs a single channel photomultiplier tube and a Jarrell-Ash 50 monochromator with a diffraction grating line density of 1180 lines/mm, which allows for first order spectra of 200-600 nm. The motorized gear of the monochromator allows spectral resolution of 0.01 nm. Equal IDS measurements are observed for various impurity emission lines of which carbon lines exhibit stronger intensities. Furthermore, the diagnostics is examined in an experiment where plasma experiences sudden disruption and quick recovery. In this case, the IDS measurements show {approx}130% increase in ion temperature. Flow measurements are shown to be consistent with plasma rotation.

  2. High resolution, high rate x-ray spectrometer

    DOE Patents [OSTI]

    Goulding, F.S.; Landis, D.A.

    1983-07-14T23:59:59.000Z

    It is an object of the invention to provide a pulse processing system for use with detected signals of a wide dynamic range which is capable of very high counting rates, with high throughput, with excellent energy resolution and a high signal-to-noise ratio. It is a further object to provide a pulse processing system wherein the fast channel resolving time is quite short and substantially independent of the energy of the detected signals. Another object is to provide a pulse processing system having a pile-up rejector circuit which will allow the maximum number of non-interfering pulses to be passed to the output. It is also an object of the invention to provide new methods for generating substantially symmetrically triangular pulses for use in both the main and fast channels of a pulse processing system.

  3. A Global, Multi-Resolution Approach to Regional Ocean Modeling

    SciTech Connect (OSTI)

    Du, Qiang

    2013-11-08T23:59:59.000Z

    In this collaborative research project between Pennsylvania State University, Colorado State University and Florida State University, we mainly focused on developing multi-resolution algorithms which are suitable to regional ocean modeling. We developed hybrid implicit and explicit adaptive multirate time integration method to solve systems of time-dependent equations that present two signi#12;cantly di#11;erent scales. We studied the e#11;ects of spatial simplicial meshes on the stability and the conditioning of fully discrete approximations. We also studies adaptive #12;nite element method (AFEM) based upon the Centroidal Voronoi Tessellation (CVT) and superconvergent gradient recovery. Some of these techniques are now being used by geoscientists(such as those at LANL).

  4. Atomic- Resolution Crystal Structure of the Antiviral Lectin Scytovirin

    SciTech Connect (OSTI)

    Moulaei,T.; Botos, I.; Ziolkowska, N.; Bokesch, H.; Krumpe, L.; McKee, T.; O'Keefe, B.; Dauter, Z.; Wlodawer, A.

    2007-01-01T23:59:59.000Z

    The crystal structures of the natural and recombinant antiviral lectin scytovirin (SVN) were solved by single-wavelength anomalous scattering and refined with data extending to 1.3 Angstroms and 1.0 Angstroms resolution, respectively. A molecule of SVN consists of a single chain 95 amino acids long, with an almost perfect sequence repeat that creates two very similar domains (RMS deviation 0.25 Angstroms for 40 pairs of Ca atoms). The crystal structure differs significantly from a previously published NMR structure of the same protein, with the RMS deviations calculated separately for the N- and C-terminal domains of 5.3 Angstroms and 3.7 Angstroms, respectively, and a very different relationship between the two domains. In addition, the disulfide bonding pattern of the crystal structures differs from that described in the previously published mass spectrometry and NMR studies.

  5. Towards wide-field high-resolution retinal imaging

    E-Print Network [OSTI]

    Kellerer, Aglae

    2015-01-01T23:59:59.000Z

    Adaptive optical correction is an efficient technique to obtain high-resolution images of the retinal surface. A main limitation of adaptive optical correction, however, is the small size of the corrected image. For medical purposes it is important to increase the size of the corrected images. This can be done through composite imaging, but a major difficulty is then the introduction of reconstruction artifacts. Another approach is multi-conjugate adaptive optics. MCAO comes in two flavors. The star- oriented approach has been demonstrated on the eye and allows to increase the diameter of the corrected image by a factor of approximately 2-3. Difficulties in the tomographic reconstruction precludes the correction of larger fields. Here we have investigate the possibility to apply a layer-oriented MCAO approach to retinal imaging.

  6. Compact and mobile high resolution PET brain imager

    DOE Patents [OSTI]

    Majewski, Stanislaw (Yorktown, VA); Proffitt, James (Newport News, VA)

    2011-02-08T23:59:59.000Z

    A brain imager includes a compact ring-like static PET imager mounted in a helmet-like structure. When attached to a patient's head, the helmet-like brain imager maintains the relative head-to-imager geometry fixed through the whole imaging procedure. The brain imaging helmet contains radiation sensors and minimal front-end electronics. A flexible mechanical suspension/harness system supports the weight of the helmet thereby allowing for patient to have limited movements of the head during imaging scans. The compact ring-like PET imager enables very high resolution imaging of neurological brain functions, cancer, and effects of trauma using a rather simple mobile scanner with limited space needs for use and storage.

  7. High-resolution X-ray spectroscopy of Theta Car

    E-Print Network [OSTI]

    Yael Naze; Gregor Rauw

    2008-08-25T23:59:59.000Z

    Context : The peculiar hot star Theta Car in the open cluster IC2602 is a blue straggler as well as a single-line binary of short period (2.2d). Aims : Its high-energy properties are not well known, though X-rays can provide useful constraints on the energetic processes at work in binaries as well as in peculiar, single objects. Methods : We present the analysis of a 50ks exposure taken with the XMM-Newton observatory. It provides medium as well as high-resolution spectroscopy. Results : Our high-resolution spectroscopy analysis reveals a very soft spectrum with multiple temperature components (1--6MK) and an X-ray flux slightly below the `canonical' value (log[L_X(0.1-10.)/L_{BOL}] ~ -7). The X-ray lines appear surprisingly narrow and unshifted, reminiscent of those of beta Cru and tau Sco. Their relative intensities confirm the anomalous abundances detected in the optical domain (C strongly depleted, N strongly enriched, O slightly depleted). In addition, the X-ray data favor a slight depletion in neon and iron, but they are less conclusive for the magnesium abundance (solar-like?). While no significant changes occur during the XMM-Newton observation, variability in the X-ray domain is detected on the long-term range. The formation radius of the X-ray emission is loosely constrained to <5 R_sol, which allows for a range of models (wind-shock, corona, magnetic confinement,...) though not all of them can be reconciled with the softness of the spectrum and the narrowness of the lines.

  8. Streptavidin and its biotin complex at atomic resolution

    SciTech Connect (OSTI)

    Le Trong, Isolde [University of Washington, Box 35742, Seattle, WA 98195-7420 (United States); University of Washington, Box 357742, Seattle, WA 98195-7742 (United States); Wang, Zhizhi [University of Washington, Box 35742, Seattle, WA 98195-7420 (United States); Hyre, David E. [University of Washington, Box 355061, Seattle, WA 98195-5061 (United States); Lybrand, Terry P. [Vanderbilt University, 5142 Medical Research Building III, 465 21st Avenue South, Nashville, TN 37232-8725 (United States); Stayton, Patrick S. [University of Washington, Box 355061, Seattle, WA 98195-5061 (United States); Stenkamp, Ronald E., E-mail: stenkamp@u.washington.edu [University of Washington, Box 35742, Seattle, WA 98195-7420 (United States); University of Washington, Box 357742, Seattle, WA 98195-7742 (United States); University of Washington, Box 357430, Seattle, WA 98195-7430 (United States)

    2011-09-01T23:59:59.000Z

    Analysis of atomic resolution crystal structures of wild-type streptavidin (1.03 Ĺ) and its biotin complex (0.95 Ĺ) indicate the range of conformational states taken on by this protein in the solid state. Most of the structural variation is found in the polypeptide loops between the strands in this ?-sandwich protein. Atomic resolution crystallographic studies of streptavidin and its biotin complex have been carried out at 1.03 and 0.95 Ĺ, respectively. The wild-type protein crystallized with a tetramer in the asymmetric unit, while the crystals of the biotin complex contained two subunits in the asymmetric unit. Comparison of the six subunits shows the various ways in which the protein accommodates ligand binding and different crystal-packing environments. Conformational variation is found in each of the polypeptide loops connecting the eight strands in the ?-sandwich subunit, but the largest differences are found in the flexible binding loop (residues 45–52). In three of the unliganded subunits the loop is in an ‘open’ conformation, while in the two subunits binding biotin, as well as in one of the unliganded subunits, this loop ‘closes’ over the biotin–binding site. The ‘closed’ loop contributes to the protein’s high affinity for biotin. Analysis of the anisotropic displacement parameters included in the crystallographic models is consistent with the variation found in the loop structures and the view that the dynamic nature of the protein structure contributes to the ability of the protein to bind biotin so tightly.

  9. Airborne Multiwavelength High-Spectral-Resolution Lidar (HSRL-2) Observations During TCAP 2012: Vertical Proles of Optical and Microphysical Properties of a Smoke/Urban Haze Plume Over the Northeastern Coast of the US

    SciTech Connect (OSTI)

    Muller, Detlef; Hostetler, Chris A.; Ferrare, R. A.; Burton, S. P.; Chemyakin, Eduard; Kolgotin, A.; Hair, John; Cook, A. L.; Harper, David; Rogers, R. R.; Hare, Rich; Cleckner, Craig; Obland, Michael; Tomlinson, Jason M.; Berg, Larry K.; Schmid, Beat

    2014-10-10T23:59:59.000Z

    We present rst measurements with the rst airborne multiwavelength High-Spectral Resolution Lidar (HSRL-2), developed by NASA Langley Research Center. The instrument was operated during the Department of Energy (DOE) Two-Column Aerosol Project (TCAP) in July 2012. We observed out ow of urban haze and fresh biomass burning smoke from the East Coast of the US out over the West Atlantic Ocean. Lidar ratios at 355 and 532 nm were ... sr indicating moderately absorbing aerosols. Extinctionrelated Angstrom exponents were 1.5{2 pointing at comparably small particles. Our novel automated, unsupervised data inversion algorithm retrieves particle e*ective radii of approximately 0.2 *m, which is in agreement with the large Angstrom exponents. We nd reasonable agreement to particle size parameters obtained from situ measurements carried out with the DOE G-1 aircraft that ew during the lidar observations.

  10. Angular resolution studies of the CYGNUS array using the shadows of the sun and moon

    SciTech Connect (OSTI)

    Shoup, A.L.

    1993-01-01T23:59:59.000Z

    Using the cosmic ray shadows of the sun and moon, we have estimated the angular resolution of the CYGNUS extensive air shower array. With the event sample now available we estimate the angular resolution of the array to be 0.70[sub [minus]0.06][sup [plus]0.07] degrees. The resolution depends on the total number of detected shower particles. A new parameterization of the measured shower-front timing structure and the use of counters with small pulse areas lead to a [approximately]25% improvement in the resolution. The systematic pointing error of the array is less than 0.4[degree].

  11. Angular resolution studies of the CYGNUS array using the shadows of the sun and moon

    SciTech Connect (OSTI)

    Shoup, A.L.; The CYGNUS Collaboration

    1993-05-01T23:59:59.000Z

    Using the cosmic ray shadows of the sun and moon, we have estimated the angular resolution of the CYGNUS extensive air shower array. With the event sample now available we estimate the angular resolution of the array to be 0.70{sub {minus}0.06}{sup {plus}0.07} degrees. The resolution depends on the total number of detected shower particles. A new parameterization of the measured shower-front timing structure and the use of counters with small pulse areas lead to a {approximately}25% improvement in the resolution. The systematic pointing error of the array is less than 0.4{degree}.

  12. 2013 American Geophysical Union. All Rights Reserved. High resolution imaging of the melt distribution in 1

    E-Print Network [OSTI]

    © 2013 American Geophysical Union. All Rights Reserved. High resolution imaging of the melt;© 2013 American Geophysical Union. All Rights Reserved. Abstract We determine the 3-D melt geometry

  13. Action Plan and Status of Resolutions for LWRS Steering Committee Recommendations Dated August 13, 2009

    SciTech Connect (OSTI)

    Hongbin Zhang

    2009-08-01T23:59:59.000Z

    The resolutions to the recommendations from the Report of the Steering Committee for the LWRS Program Dated August 13, 2009 are documented.

  14. applying high-resolution detectors: Topics by E-print Network

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

    since Spring 1999. Stereo 3 Using High-Resolution Detector and Signal Data to Support Energy Storage, Conversion and Utilization Websites Summary: data collection and storage...

  15. area high-resolution ccd-based: Topics by E-print Network

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

    CCD-Based Thermoreflectance Techniques for High-Resolution Transient Thermal Imaging Energy Storage, Conversion and Utilization Websites Summary: on the small but detectable...

  16. The material dependence of temperature measurement resolution in thermal scanning electron microscopy

    SciTech Connect (OSTI)

    Wu, Xiaowei; Hull, Robert [Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, New York 12180 (United States)] [Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, 110 8th Street, Troy, New York 12180 (United States)

    2013-03-18T23:59:59.000Z

    Thermal scanning electron microscopy is a recently developed temperature mapping technique based on thermal diffuse scattering in electron backscatter diffraction in a scanning electron microscope. It provides nano-scale and non-contact temperature mapping capabilities. Due to the specific temperature sensitive mechanism inherent to this technique, the temperature resolution is highly material dependent. A thorough investigation of what material properties affect the temperature resolution is important for realizing the inherent temperature resolution limit for each material. In this paper, three material dependent parameters-the Debye-Waller B-factor temperature sensitivity, backscatter yield, and lattice constant-are shown to control the temperature resolution.

  17. (SO2)-S-34-O-16: High-resolution analysis of the (030),(101)...

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

    (111), (002) and (201) vibrational states; determination of Abstract: High resolution Fourier transform spectra of a sample of sulfur dioxide, enriched in 34S (95.3%). were...

  18. Demonstration of 12 nm resolution Fresnel zone plate lens based soft x-ray microscopy

    E-Print Network [OSTI]

    Chao, W.

    2010-01-01T23:59:59.000Z

    of 12 nm Resolution Fresnel Zone Plate Lens based Soft X-raynanofabrication process for Fresnel zone plate lenses. Theoptical performance of Fresnel zone plate lens based imaging

  19. High resolution neutron imaging of water in PEM fuel cells

    SciTech Connect (OSTI)

    Mukundan, Rangachary [Los Alamos National Laboratory; Borup, Rodney L [Los Alamos National Laboratory; Davey, John R [Los Alamos National Laboratory; Spendelow, Jacob S [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    Optimal water management in Polymer Electrolyte Membrane (PEM) fuel cells is critical to improving the performance and durability of fuel cell systems especially during transient, start-up and shut-down operations. For example, while a high water content is desirable for improved membrane and catalyst ionomer conductivity, high water content can also block gas access to the triple-phase boundary resulting in lowered performance due to catalyst and gas diffusion layer (GDL) flooding. Visualizing liquid water by neutron imaging has been used over the past decade to study the water distribution inside operating fuel cells. In this paper, the results from our imaging at NIST using their recently installed higher resolution ({approx} 25 mm) Microchannel Plate (MCP) detector with a pixel pitch of 14.7 mm are presented. This detector is capable of quantitatively imaging the water inside the MEA (Membrane Electrode Assembly)/GDL (Gas Diffusion Layer) of working fuel cells and can provide the water profiles within these various components in addition to the channel water. Specially designed fuel cells (active area = 2.25 cm{sup 2}) have been used in order to take advantage of the full detector resolution. The cell design is illustrated in a figure where one of the current collector/end plates is shown. The serpentine pattern was machined into a block of aluminum and plated with nickel and then gold to form the flow field. The measurements were performed using beam no. 1 and aperture no. 2 with a fluence rate of 1.9 x 10{sup 6} neutrons cm{sup -2} sec{sup -1}. The cells were assembled with Gore{sup TM} Primea{sup R} MEAs and SGL Sigracet {sup R} 24 series GDLs (PRIMEA, GORE-SELECT and GORE are trademarks of W. L. Gore & Associates, Inc). All the cells were tested at 80 {sup o}C with 1.2 stoichiometry H{sub 2} and 2.0 stoichiometry air flows.

  20. SPACE-R thermionic space nuclear power system: Design and technology demonstration. Task 1.5.6, Moderator containment laboratory experiment test plant (CDRL No. 5)

    SciTech Connect (OSTI)

    Not Available

    1993-10-01T23:59:59.000Z

    The preferred moderator being considered for SPACE-R is yttrium hydride encased in beryllium tubes. The baseline beryllium performs a dual function as it acts as a moderator and provides containment for hydrogen. The permeation rate of hydrogen from the hydride through the beryllium shell at the operating temperature is an important factor for the functionality and reliability of the Be-YHx moderator. Hydrogen containment capability of beryllium is comparable to enamel which was used in SNAP and Topaz II reactors. However, limited experimental data base exists for the hydrogen permeation through fabricated beryllium enclosures at high temperature. Permeation of hydrogen in beryllium is strongly affected by surface conditions, thickness of surface oxide, surface and bulk traps, impurity content and microstructure. The objective of this experiment is to determine the permeation rate of hydrogen from yttrium hydride and zirconium hydride through beryllium in the temperature range of 773 K--973 K. In addition, Topaz II type zirconium hydride specimens with and without the proprietary oxide coating canned in stainless steel will be tested to measure the hydrogen permeation rate. The TSET SS-canned ZrHx samples currently at Phillips Laboratory will be used for the latter test with Phillips Laboratory participation at the SPI hydrogen leak test stand. A key technology demonstration of the effectiveness of transferred arc plasma spraying of a 1 mil Molybdenum coating on the Be cladding will be performed. The effectiveness of the Molybdenum coating in preventing any interaction of Be with Stainless Steel in NaK will be assessed and demonstrated.

  1. HTR-PROTEUS Pebble Bed Experimental Program Cores 1, 1A, 2, and 3: Hexagonal Close Packing with a 1:2 Moderator-to-Fuel Pebble Ratio

    SciTech Connect (OSTI)

    John D. Bess; Barbara H. Dolphin; James W. Sterbentz; Luka Snoj; Igor Lengar; Oliver Köberl

    2012-03-01T23:59:59.000Z

    In its deployment as a pebble bed reactor (PBR) critical facility from 1992 to 1996, the PROTEUS facility was designated as HTR-PROTEUS. This experimental program was performed as part of an International Atomic Energy Agency (IAEA) Coordinated Research Project (CRP) on the Validation of Safety Related Physics Calculations for Low Enriched HTGRs. Within this project, critical experiments were conducted for graphite moderated LEU systems to determine core reactivity, flux and power profiles, reaction-rate ratios, the worth of control rods, both in-core and reflector based, the worth of burnable poisons, kinetic parameters, and the effects of moisture ingress on these parameters. Four benchmark experiments were evaluated in this report: Cores 1, 1A, 2, and 3. These core configurations represent the hexagonal close packing (HCP) configurations of the HTR-PROTEUS experiment with a moderator-to-fuel pebble ratio of 1:2. Core 1 represents the only configuration utilizing ZEBRA control rods. Cores 1A, 2, and 3 use withdrawable, hollow, stainless steel control rods. Cores 1 and 1A are similar except for the use of different control rods; Core 1A also has one less layer of pebbles (21 layers instead of 22). Core 2 retains the first 16 layers of pebbles from Cores 1 and 1A and has 16 layers of moderator pebbles stacked above the fueled layers. Core 3 retains the first 17 layers of pebbles but has polyethylene rods inserted between pebbles to simulate water ingress. The additional partial pebble layer (layer 18) for Core 3 was not included as it was used for core operations and not the reported critical configuration. Cores 1, 1A, 2, and 3 were determined to be acceptable benchmark experiments.

  2. HTR-PROTEUS Pebble Bed Experimental Program Cores 1, 1A, 2, and 3: Hexagonal Close Packing with a 1:2 Moderator-to-Fuel Pebble Ratio

    SciTech Connect (OSTI)

    John D. Bess; Barbara H. Dolphin; James W. Sterbentz; Luka Snoj; Igor Lengar; Oliver Köberl

    2013-03-01T23:59:59.000Z

    In its deployment as a pebble bed reactor (PBR) critical facility from 1992 to 1996, the PROTEUS facility was designated as HTR-PROTEUS. This experimental program was performed as part of an International Atomic Energy Agency (IAEA) Coordinated Research Project (CRP) on the Validation of Safety Related Physics Calculations for Low Enriched HTGRs. Within this project, critical experiments were conducted for graphite moderated LEU systems to determine core reactivity, flux and power profiles, reaction-rate ratios, the worth of control rods, both in-core and reflector based, the worth of burnable poisons, kinetic parameters, and the effects of moisture ingress on these parameters. Four benchmark experiments were evaluated in this report: Cores 1, 1A, 2, and 3. These core configurations represent the hexagonal close packing (HCP) configurations of the HTR-PROTEUS experiment with a moderator-to-fuel pebble ratio of 1:2. Core 1 represents the only configuration utilizing ZEBRA control rods. Cores 1A, 2, and 3 use withdrawable, hollow, stainless steel control rods. Cores 1 and 1A are similar except for the use of different control rods; Core 1A also has one less layer of pebbles (21 layers instead of 22). Core 2 retains the first 16 layers of pebbles from Cores 1 and 1A and has 16 layers of moderator pebbles stacked above the fueled layers. Core 3 retains the first 17 layers of pebbles but has polyethylene rods inserted between pebbles to simulate water ingress. The additional partial pebble layer (layer 18) for Core 3 was not included as it was used for core operations and not the reported critical configuration. Cores 1, 1A, 2, and 3 were determined to be acceptable benchmark experiments.

  3. Application of precision mechanical engineering techniques to the design of a moderate energy beam transport for the FAA explosive detection system

    SciTech Connect (OSTI)

    Lujan, R.; Christensen, K.

    1993-01-01T23:59:59.000Z

    This paper discusses the application of precision mounting and alignment techniques to a moderate energy beam transport system (MEBT) used on the exit of a 1.75 MeV RFQ. While frequently found in optical systems, techniques-such-as kinematic mounting, and degree-of-freedom decoupling, are not as widely used for accelerator components. The MEBT consist of one permanent magnet quadrupole, four electro magnet quadrupole, and one debuncher cavity. Included in the paper are discussions of design and fabrication considerations as well as, installation, alignment and operations experience during the successful implementation on a working accelerator.

  4. Application of precision mechanical engineering techniques to the design of a moderate energy beam transport for the FAA explosive detection system

    SciTech Connect (OSTI)

    Lujan, R.; Christensen, K.

    1993-06-01T23:59:59.000Z

    This paper discusses the application of precision mounting and alignment techniques to a moderate energy beam transport system (MEBT) used on the exit of a 1.75 MeV RFQ. While frequently found in optical systems, techniques-such-as kinematic mounting, and degree-of-freedom decoupling, are not as widely used for accelerator components. The MEBT consist of one permanent magnet quadrupole, four electro magnet quadrupole, and one debuncher cavity. Included in the paper are discussions of design and fabrication considerations as well as, installation, alignment and operations experience during the successful implementation on a working accelerator.

  5. Fuel Effects on Combustion and Emissions of a Direct-Inection Diesel Engine Operating at Moderate to High Engine Speed and Load

    SciTech Connect (OSTI)

    Szybist, James P [ORNL; Szymkowicz, Patrick G. [General Motors Corporation; Northrop, William F [General Motors Corporation

    2012-01-01T23:59:59.000Z

    It is advantageous to increase the specific power output of diesel engines and to operate them at higher load for a greater portion of a driving cycle to achieve better thermal efficiency and thus reduce vehicle fuel consumption. Such operation is limited by excessive smoke formation at retarded injection timing and high rates of cylinder pressure rise at more advanced timing. Given this window of operation, it is desired to understand the influence of fuel properties such that optimum combustion performance and emissions can be retained over the range of fuels commonly available in the marketplace. It has been shown in previous studies that varying cetane number (CN) of diesel fuel has little effect on ignition delay at high engine load due to the domination of high cylinder temperature on ignition kinetics. The work here experimentally confirms that finding but also shows that emissions and combustion performance vary according to fuel reactivity. Data are examined from a direct-injection single cylinder research engine for eight common diesel fuels including soy-based biodiesel blends at two high load operating points with no exhaust gas recirculation (EGR) and at a moderate load with four levels of EGR. It is shown in the work that at high engine load where combustion is controlled by mixing processes, CN and other fuel properties have little effect on engine performance, although lower CN fuels produce a small increase in noise, smoke and CO emissions. Biodiesel blends increase NOX emissions and decreases CO and smoke emissions at high load, but otherwise have little effect on performance. At moderate load, higher CN fuels are more tolerant to EGR due to their better chemical reactivity at retarded injection timing, but all fuels produce comparable thermal efficiency at advanced combustion phasing regardless of EGR. In contrast to the high load conditions, there was no increase in NOX emissions for biodiesel at the moderate load condition. It is concluded that although higher CN does not significantly alter ignition delay at moderate to high loads it has a dominant influence on the acceptable injection timing range. Apart from CN effects, fuel oxygen content plays an independent role in reducing some emissions. It is therefore recommended that compensation for fuel ignitability and oxygen content be included in combustion control strategies to optimize emissions and performance of future diesel engines.

  6. A Study on the time resolution of Glass RPC

    E-Print Network [OSTI]

    N. Dash; V. M. Datar; G. Majumder

    2014-10-21T23:59:59.000Z

    The 50~kton Iron Calorimeter (ICAL) detector at the underground India based Neutrino Observatory (INO) will make measurements on atmospheric neutrinos. Muons produced in charged current (CC) interactions of muon neutrinos with the iron are tracked spatially and temporally through the signals that they produce in the Resistive Plate Chambers~(RPCs) that are interleaved with iron layers. Since the RPCs will be operated in the avalanche mode the signal rise-time is $\\sim~1~\\rm{nsec}$ resulting in a fast time response. While the muon track is derived from the X and Y hit information of the RPCs and the layer number (Z), the upward or downward direction is obtained by using the time information from the detector. Such a capability can be examined by analysing the timing information from $1~\\rm{m}~\\times~1~\\rm{m}$ glass RPCs, with $3~\\rm{cm}$ wide X- and Y- pick-up strips, in a $12$ layer RPC stack that measures cosmic muon events. The present study looks at the pixel-wise time response of these RPCs in order to improve the relative time distribution and hence the up-down discrimination capability. After including the effect of propagation delay in the cable and pick-up panel the time resolution improves, in some cases, to $\\leq~1~\\rm{nsec}$ whereas in some cases there is no significant change. These results will help in significantly improving on the extraction of the directionality of muons produced in CC interactions of $\

  7. Resolution of Identity Crisis of Events in Pile-up

    E-Print Network [OSTI]

    Avinash A. Deshpande; Harsha Raichur

    2012-06-27T23:59:59.000Z

    Mutually uncorrelated random discrete events, manifesting a common basic process, are examined often in terms of their occurrence rate as a function of one or more of their distinguishing attributes, such as measurements of photon spectrum as a function of energy. Such rate distributions obtained from the observed attribute values for an ensemble of events will correspond to the "true" distribution only if the event occurrence were {\\it mutually exclusive}. However, due to finite resolution in such measurements, the problem of event {\\it pile-up} is not only unavoidable, but also increases with event rate. Although extensive simulations to estimate the distortion due to pile-up in the observed rate distribution are available, no restoration procedure has yet been suggested. Here we present an elegant analytical solution to recover the underlying {\\it true} distribution. Our method, based on Poisson statistics and Fourier transforms, is shown to perform as desired even when applied to distributions that are significantly distorted by pile-up. Our recipes for correction, as well as for prediction, of pile-up are expected to find ready applications in a wide variety of fields, ranging from high-energy physics to medical clinical diagnostics, and involving, but not limited to, measurements of count-rates and/or spectra of incident radiation using Charge Coupled Devices (CCDs) or other similar devices.

  8. Higher Resolution VLBI Imaging with Fast Frequency Switching

    E-Print Network [OSTI]

    E. Middelberg; A. L. Roy; R. C. Walker; H. Falcke; T. P. Krichbaum

    2002-07-03T23:59:59.000Z

    Millimetre-VLBI is an important tool in AGN astrophysics, but it is limited by short atmospheric coherence times and poor receiver and antenna performance. We demonstrate a new kind of phase referencing for the VLBA, enabling us to increase the sensitivity in mm-VLBI by an order of magnitude. If a source is observed in short cycles between the target frequency, nu_t, and a reference frequency, nu_ref, the nu_t data can be calibrated using scaled-up phase solutions from self-calibration at nu_ref. We have demonstrated the phase transfer on 3C 279, where we were able to make an 86 GHz image with 90 % coherence compared to self-calibration at nu_t. We have detected M81, our science target in this project, at 86 GHz using the same technique. We describe scheduling strategy and data reduction. The main impacts of fast frequency switching are the ability to image some of the nearest, but relatively weak AGN cores with unprecedented high angular resolution and to phase-reference the nu_t data to the nu_ref core position, enabling the detection of possible core shifts in jets due to optical depth effects. This ability will yield important constraints on jet properties and might be able to discriminate between the two competing emission models of Blandford-Konigl jets and spherical advection-dominated accretion flows (ADAFs) in low-luminosity AGNs.

  9. High Resolution Rydberg Spectroscopy of ultracold Rubidium Atoms

    E-Print Network [OSTI]

    Axel Grabowski; Rolf Heidemann; Robert Löw; Jürgen Stuhler; Tilman Pfau

    2005-08-10T23:59:59.000Z

    We present experiments on two-photon excitation of ${\\rm ^{87}}$Rb atoms to Rydberg states. For this purpose, two continuous-wave (cw)-laser systems for both 780 nm and 480 nm have been set up. These systems are optimized to a small linewidth (well below 1 MHz) to get both an efficient excitation process and good spectroscopic resolution. To test the performance of our laser system, we investigated the Stark splitting of Rydberg states. For n=40 we were able to see the hyperfine levels splitting in the electrical field for different finestructure states. To show the ability of spatially selective excitation to Rydberg states, we excited rubidium atoms in an electrical field gradient and investigated both linewidths and lineshifts. Furthermore we were able to excite the atoms selectively from the two hyperfine ground states to Rydberg states. Finally, we investigated the Autler-Townes splitting of the 5S$_{1/2}$$\\to$5P$_{3/2}$ transition via a Rydberg state to determine the Rabi frequency of this excitation step.

  10. Atomic Resolution Imaging and Quantification of Chemical Functionality of Surfaces

    SciTech Connect (OSTI)

    Schwarz, Udo [Yale University

    2014-12-10T23:59:59.000Z

    The work carried out from 2006-2014 under DoE support was targeted at developing new approaches to the atomic-scale characterization of surfaces that include species-selective imaging and an ability to quantify chemical surface interactions with site-specific accuracy. The newly established methods were subsequently applied to gain insight into the local chemical interactions that govern the catalytic properties of model catalysts of interest to DoE. The foundation of our work was the development of three-dimensional atomic force microscopy (3D-AFM), a new measurement mode that allows the mapping of the complete surface force and energy fields with picometer resolution in space (x, y, and z) and piconewton/millielectron volts in force/energy. From this experimental platform, we further expanded by adding the simultaneous recording of tunneling current (3D-AFM/STM) using chemically well-defined tips. Through comparison with simulations, we were able to achieve precise quantification and assignment of local chemical interactions to exact positions within the lattice. During the course of the project, the novel techniques were applied to surface-oxidized copper, titanium dioxide, and silicon oxide. On these materials, defect-induced changes to the chemical surface reactivity and electronic charge density were characterized with site-specific accuracy.

  11. Measurement of {sup 17}F+p reactions at RESOLUT

    SciTech Connect (OSTI)

    Linhardt, L. E.; Baby, L.; Bardayan, D. W.; Blackmon, J. C.; Gardiner, H.; Johnson, E.; Koschiy, E.; Macon, K. T.; Rasco, B. C.; Rogachev, G.; Santiago-Gonzalez, D.; Wiedenhoever, I. [Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Tower Dr., Baton Rouge, LA 70803 (United States); Department of Physics, Florida State University, 315 Keen Building, Tallahasse, FL 32306 (United States); Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States); Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Tower Dr., Baton Rouge, LA 70803 (United States); Department of Physics, Florida State University, 315 Keen Building, Tallahasse, FL 32306 (United States); Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Tower Dr., Baton Rouge, LA 70803 (United States); Department of Physics, Florida State University, 315 Keen Building, Tallahasse, FL 32306 (United States)

    2012-11-20T23:59:59.000Z

    The {sup 14}O({alpha},p){sup 17}F reaction is important for understanding the {alpha}p process that occurs in X-ray bursts, but the rate of this reaction remains uncertain due to the uncertain properties of states in {sup 18}Ne. We measured the {sup 17}F(p,p){sup 17}F and {sup 17}F(p,{alpha}){sup 14}O reactions to study the properties of states in {sup 18}Ne that are important for the {sup 14}O({alpha},p){sup 17}F reaction using {sup 17}F radioactive beams from the RESOLUT facility at Florida State University. Double-sided silicon strip detectors were used to detect light particles, and recoiling heavy ions were detected in coincidence using a gas ionization chamber at forward angles. The performance of the system was first tested using the {sup 17}O(p,{alpha}){sup 14}N reaction. This was the first measurement using the ASIC electronics and recoil detector being developed for the Array for Nuclear Astrophysics Studies with Exotic Nuclei (ANASEN). We report on the performance and preliminary results.

  12. Fundamenta Informaticae 133 1 A resolution calculus for first-order schemata

    E-Print Network [OSTI]

    Boyer, Edmond

    .Echenim@imag.fr Nicolas Peltier LIG/CNRS Nicolas.Peltier@imag.fr Abstract. We devise a resolution calculus that tests-2013-855 #12;2 V. Aravantinos, M. Echenim, N. Peltier / A resolution calculus for first-order schemata

  13. Cryogenic scanning Hall-probe microscope with centimeter scan range and submicron resolution

    E-Print Network [OSTI]

    Moler, Kathryn A.

    with 200 nm positioning resolution by coupling stepper motors to high-resolution drivers and reducing gears in coated conductors--high-Tc superconducting tapes--is demonstrated via model systems. We image an entire also use motor-driven microme- ters but couple them to improved electronics and reducing gears

  14. A Steerable Laser System for Atmospheric Monitoring at the High Resolution Flys Eye

    E-Print Network [OSTI]

    and radiometer . The energy 2 released into the sky is determined by multiplying this measurementOG 4.5.10 A Steerable Laser System for Atmospheric Monitoring at the High Resolution Flys Eye J. R. Mumford , R. C. Gray , L. R. Wiencke for the 1 1 1 High Resolution Flys Eye Collaboration 1. Physics

  15. Sea Ice Mapping Using Enhanced Resolution Advanced Scatterometer Images Steven Reeves

    E-Print Network [OSTI]

    Long, David G.

    Sea Ice Mapping Using Enhanced Resolution Advanced Scatterometer Images Steven Reeves A thesis Rights Reserved #12;ABSTRACT Sea Ice Mapping Using Enhanced Resolution Advanced Scatterometer Images Steven Reeves Department of Electrical and Computer Engineering Master of Science Sea ice is of great

  16. Highly ecient kinetic resolution of 2-cyclohexenyl acetate in Pd-catalyzed allylic alkylation

    E-Print Network [OSTI]

    Zhang, Xumu

    Highly ecient kinetic resolution of 2-cyclohexenyl acetate in Pd-catalyzed allylic alkylation James resolution of 2-cyclohexenyl acetate was observed during alkylation. In addition, the reactivity and enantioselectivity showed a strong dependence on the acetate salt with the BSA/MOAc (M=alkali metal) base system

  17. High Resolution Wave Propagation Schemes for Two-Fluid Plasma Simulations

    E-Print Network [OSTI]

    Shumlak, Uri

    High Resolution Wave Propagation Schemes for Two-Fluid Plasma Simulations Ammar H. Hakim Information and Learning, 300 North Zeeb Road, Ann Arbor, MI 48106-1346, 1-800-521-0600, to whom the author Abstract High Resolution Wave Propagation Schemes for Two-Fluid Plasma Simulations Ammar H. Hakim Chair

  18. ATTEMPT OF ALPINE GLACIER FLOW MODELING BASED ON CORRELATION MEASUREMENTS OF HIGH RESOLUTION SAR IMAGES

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ATTEMPT OF ALPINE GLACIER FLOW MODELING BASED ON CORRELATION MEASUREMENTS OF HIGH RESOLUTION SAR In this paper, an attempt of Alpine glacier flow modeling is performed based on a series of high resolution TerraSAR-X SAR images and a Digital Elevation Model. First, a glacier flow model is established

  19. Evaluation of a CCD-based high resolution autocollimator for use as a slope sensor

    E-Print Network [OSTI]

    Baltisberger, Jay H.

    Evaluation of a CCD-based high resolution autocollimator for use as a slope sensor Rohan Isaac the focused beam profile to broaden and decrease its peak intensity Project: Evaluation of a compact CCD-based high resolution autocollimator with a small probe beam for potential use as a slope sensor Optics Group

  20. A NEW HIGH ENERGY RESOLUTION NEUTRON TRANSMISSION DETECTOR SYSTEM AT THE GAERTTNER LINAC LABORATORY

    E-Print Network [OSTI]

    Danon, Yaron

    Laboratory P.O. Box 1072, Schenectady, New York 12301-1072 A new high energy resolution modular neutronA NEW HIGH ENERGY RESOLUTION NEUTRON TRANSMISSION DETECTOR SYSTEM AT THE GAERTTNER LINAC LABORATORY capabilities at the Laboratory in and above the resolved resonance energy region from 1 keV to 600 ke

  1. GEOPHYSICAL RESEARCH LETTERS, VOL. ???, XXXX, DOI:10.1029/, Source geometry from exceptionally high resolution

    E-Print Network [OSTI]

    Boyer, Edmond

    resolution Long Period event observations at Mt Etna during the 2008 eruption. Louis De Barros 1 to the summit, allowing us to observe seismic activity with exceptionally high resolution. 129 Long Period. These events form two families of similar wave- forms with different temporal distributions. Event locations

  2. Range imaging: a new method for high-resolution topographic measurements in small-and medium-

    E-Print Network [OSTI]

    Kirchner, James W.

    Range imaging: a new method for high-resolution topographic measurements in small- and medium is a useful complement or alternative to existing methods for high-resolution measurements in small- to medium has led to a dramatic increase in terrain information and opened up new opportunities for hydro- logic

  3. Tangential resolution improvement in thermoacoustic and photoacoustic tomography using a negative

    E-Print Network [OSTI]

    Wang, Lihong

    Tangential resolution improvement in thermoacoustic and photoacoustic tomography using a negative improve- ment of the tangential resolution in both thermoacoustic and photoa- coustic tomography. In both thermoacoustic and photoacoustic tomography, for a given transducer bandwidth, the aperture size of the detector

  4. Air Traffic Complexity Resolution in Multi-Sector Planning Using CP

    E-Print Network [OSTI]

    Flener, Pierre

    Air Traffic Complexity Resolution in Multi-Sector Planning Using CP Pierre Flener1 Justin Pearson1 Programming for ATC & ATM, Brétigny (France), 2 December 2008 #12;Objective Air Traffic Complexity Complexity Resolution A CP Model Experiments Conclusion Outline 1 Objective 2 Air Traffic Complexity 3 Complexity

  5. Experimental measurement of human head motion for high-resolution computed tomography

    E-Print Network [OSTI]

    Wang, Ge

    Experimental measurement of human head motion for high-resolution computed tomography system design experimentally measured for high-resolution computed tomography CT design using a Canon digital camera. Our goal-Optical Instrumentation Engineers. DOI: 10.1117/1.3454379 Subject terms: head motion; computed tomography CT ; image

  6. High Resolution Backside Imaging and Thermography using a Numerical Aperture Increasing Lens

    E-Print Network [OSTI]

    High Resolution Backside Imaging and Thermography using a Numerical Aperture Increasing Lens Shawn inspection alone, it is necessary to develop techniques, such as thermography, with the capability ­solid immersion lens microscopy and thermography. Standard non-contact optical resolution is limited

  7. A comprehensive set of high-resolution grids of monthly climate for Europe and the globe

    E-Print Network [OSTI]

    Watson, Andrew

    on biomass potential in western Europe; Rotmans A comprehensive set of high-resolution grids of monthly climate for Europe and the globe;1 A comprehensive set of high-resolution grids of monthly climate for Europe and the globe: the observed record

  8. Net Carbon Flux from US Croplands at 1km2 Resolution.

    E-Print Network [OSTI]

    Net Carbon Flux from US Croplands at 1km2 Resolution. This estimate includes all on-site sources and sinks of carbon Agronomic Feedstock Production and Environmental Impact Analyses ORNL uses high-resolution projections of feedstock production in analyses of soil carbon change, soil erosion, energy use, net

  9. Semistable Models of Curves Resolution of singularities on the tower of modular

    E-Print Network [OSTI]

    Semistable Models of Curves Resolution of singularities on the tower of modular curves Jared on the tower of modular curves #12;Semistable Models of Curves Semistable models: Definition Let R Resolution of singularities on the tower of modular curves #12;Semistable Models of Curves Semistable models

  10. A high-resolution mapped grid algorithm for compressible multiphase flow problems

    E-Print Network [OSTI]

    Shyue, Keh-Ming

    A high-resolution mapped grid algorithm for compressible multiphase flow problems K.-M. Shyue mapped grid approach for the efficient numerical simula- tion of compressible multiphase flow in general problems, J. Comput. Phys. 142 (1998) 208-242). A standard high-resolution mapped grid method in wave

  11. An Evaluation of Multi-resolution Storage for Sensor Deepak Ganesan

    E-Print Network [OSTI]

    Ganesan, Deepak

    arrays, efficient support for multi-resolution storage and iterative, drill-down queries is essen- tial-resolution summarization, (b) highly efficient drill-down search over such sum- maries, and (c) efficient use of network signal manipulation, including modeling, searching for new patterns or trends, looking for correla- tion

  12. Atmospheric Moisture Budget and Spatial Resolution Dependence of Precipitation Extremes in Aquaplanet Simulations

    SciTech Connect (OSTI)

    Yang, Qing; Leung, Lai-Yung R.; Rauscher, Sara; Ringler, Todd; Taylor, Mark

    2014-05-01T23:59:59.000Z

    This study investigates the resolution dependency of precipitation extremes in an aqua-planet framework. Strong resolution dependency of precipitation extremes is seen over both tropics and extra-tropics, and the magnitude of this dependency also varies with dynamical cores. Moisture budget analyses based on aqua-planet simulations with the Community Atmosphere Model (CAM) using the Model for Prediction Across Scales (MPAS) and High Order Method Modeling Environment (HOMME) dynamical cores but the same physics parameterizations suggest that during precipitation extremes moisture supply for surface precipitation is mainly derived from advective moisture convergence. The resolution dependency of precipitation extremes mainly originates from advective moisture transport in the vertical direction. At most vertical levels over the tropics and in the lower atmosphere over the subtropics, the vertical eddy transport of mean moisture field dominates the contribution to precipitation extremes and its resolution dependency. Over the subtropics, the source of moisture, its associated energy, and the resolution dependency during extremes are dominated by eddy transport of eddies moisture at the mid- and upper-troposphere. With both MPAS and HOMME dynamical cores, the resolution dependency of the vertical advective moisture convergence is mainly explained by dynamical changes (related to vertical velocity or omega), although the vertical gradients of moisture act like averaging kernels to determine the sensitivity of the overall resolution dependency to the changes in omega at different vertical levels. The natural reduction of variability with coarser resolution, represented by areal data averaging (aggregation) effect, largely explains the resolution dependency in omega. The thermodynamic changes, which likely result from non-linear feedback in response to the large dynamical changes, are small compared to the overall changes in dynamics (omega). However, after excluding the data aggregation effect in omega, thermodynamic changes become relatively significant in offsetting the effect of dynamics leading to reduce differences between the simulated and aggregated results. Compared to MPAS, the simulated stronger vertical motion with HOMME also results in larger resolution dependency. Compared to the simulation at fine resolution, the vertical motion during extremes is insufficiently resolved/parameterized at the coarser resolution even after accounting for the natural reduction in variability with coarser resolution, and this is more distinct in the simulation with HOMME. To reduce uncertainties in simulated precipitation extremes, future development in cloud parameterizations must address their sensitivity to spatial resolution as well as dynamical cores.

  13. Chandra High Resolution X-ray Spectroscopy of AM Her

    E-Print Network [OSTI]

    V. Girish; V. R. Rana; K. P. Singh

    2007-02-14T23:59:59.000Z

    We present the results of high resolution spectroscopy of the prototype polar AM Herculis observed with Chandra High Energy Transmission Grating. The X-ray spectrum contains hydrogen-like and helium-like lines of Fe, S, Si, Mg, Ne and O with several Fe L-shell emission lines. The forbidden lines in the spectrum are generally weak whereas the hydrogen-like lines are stronger suggesting that emission from a multi-temperature, collisionally ionized plasma dominates. The helium-like line flux ratios yield a plasma temperature of 2 MK and a plasma density 1 - 9 x10^12 cm^-3, whereas the line flux ratio of Fe XXVI to Fe XXV gives an ionization temperature of 12.4 +1.1 -1.4 keV. We present the differential emission measure distribution of AM Her whose shape is consistent with the volume emission measure obtained by multi-temperature APEC model. The multi-temperature plasma model fit to the average X-ray spectrum indicates the mass of the white dwarf to be ~1.15 M_sun. From phase resolved spectroscopy, we find the line centers of Mg XII, S XVI, resonance line of Fe XXV, and Fe XXVI emission modulated by a few hundred to 1000 km/s from the theoretically expected values indicating bulk motion of ionized matter in the accretion column of AM Her. The observed velocities of Fe XXVI ions are close to the expected shock velocity for a 0.6 M_sun white dwarf. The observed velocity modulation is consistent with that expected from a single pole accreting binary system.

  14. Radiation re-solution of fission gas in non-oxide nuclear fuel

    SciTech Connect (OSTI)

    Christopher Matthews; Daniel Schwen; Andrew C. Klein

    2014-12-01T23:59:59.000Z

    Renewed interest in fast nuclear reactors is creating a need for better understanding of fission gas bubble behavior in non-oxide fuels to support very long fuel lifetimes. Collisions between fission fragments and their subsequent cascades can knock fission gas atoms out of bubbles and back into the fuel lattice. We showed that these collisions can be treated as using the so-called ‘‘homogenous’’ atom-by-atom re-solution theory and calculated using the Binary Collision Approximation code 3DOT. The calculations showed that there is a decrease in the re-solution parameter as bubble radius increases until about 50 nm, at which the re-solution parameter stays nearly constant. Furthermore, our model shows ion cascades created in the fuel result in many more implanted fission gas atoms than collisions directly with fission fragments. This calculated re-solution parameter can be used to find a re-solution rate for future bubble simulations.

  15. High-resolution ab initio three-dimensional x-ray diffraction microscopy

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

    Chapman, Henry N.; Barty, Anton; Marchesini, Stefano; Noy, Aleksandr; Hau-Riege, Stefan P.; Cui, Congwu; Howells, Malcolm R.; Rosen, Rachel; He, Haifeng; Spence, John C.; et al

    2006-01-01T23:59:59.000Z

    Coherent x-ray diffraction microscopy is a method of imaging nonperiodic isolated objects at resolutions limited, in principle, by only the wavelength and largest scattering angles recorded. We demonstrate x-ray diffraction imaging with high resolution in all three dimensions, as determined by a quantitative analysis of the reconstructed volume images. These images are retrieved from the three-dimensional diffraction data using no a priori knowledge about the shape or composition of the object, which has never before been demonstrated on a nonperiodic object. We also construct two-dimensional images of thick objects with greatly increased depth of focus (without loss of transverse spatialmore »resolution). These methods can be used to image biological and materials science samples at high resolution with x-ray undulator radiation and establishes the techniques to be used in atomic-resolution ultrafast imaging at x-ray free-electron laser sources.« less

  16. High-resolution ab initio Three-dimensional X-ray Diffraction Microscopy

    SciTech Connect (OSTI)

    Chapman, H N; Barty, A; Marchesini, S; Noy, A; Cui, C; Howells, M R; Rosen, R; He, H; Spence, J H; Weierstall, U; Beetz, T; Jacobsen, C; Shapiro, D

    2005-08-19T23:59:59.000Z

    Coherent X-ray diffraction microscopy is a method of imaging non-periodic isolated objects at resolutions only limited, in principle, by the largest scattering angles recorded. We demonstrate X-ray diffraction imaging with high resolution in all three dimensions, as determined by a quantitative analysis of the reconstructed volume images. These images are retrieved from the 3D diffraction data using no a priori knowledge about the shape or composition of the object, which has never before been demonstrated on a non-periodic object. We also construct 2D images of thick objects with infinite depth of focus (without loss of transverse spatial resolution). These methods can be used to image biological and materials science samples at high resolution using X-ray undulator radiation, and establishes the techniques to be used in atomic-resolution ultrafast imaging at X-ray free-electron laser sources.

  17. A Cosmic Ray Test Platform Based on the High Time Resolution MRPC Technology

    E-Print Network [OSTI]

    Tianxiang Chen; Cheng Li; Yongjie Sun; Hongfang Chen; Ming Shao; Zebo Tang; Rongxing Yang; Yi Zhou; Yifei Zhang

    2015-03-13T23:59:59.000Z

    In order to test the performance of detector/prototype in environment of laboratory, we design and build a larger area ($90\\times52$ $cm^2$) test platform of cosmic ray based on well-designed Multi-gap Resistive Plate Chamber (MRPC) with an excellent time resolution and a high detection efficiency for the minimum ionizing particles (MIPs). The time resolution of the MRPC module used is tested to be ~80 ps, and the position resolution along the strip is ~5 mm, while the position resolution perpendicular to the strip is ~12.7 mm. The platform constructed by four MRPC modules can be functional for tracking the cosmic rays with a spatial resolution ~6.3 mm, and provide a reference time ~40 ps.

  18. High-resolution ab initio three-dimensional x-ray diffraction microscopy

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

    Chapman, Henry N.; Barty, Anton; Marchesini, Stefano; Noy, Aleksandr; Hau-Riege, Stefan P.; Cui, Congwu; Howells, Malcolm R.; Rosen, Rachel; He, Haifeng; Spence, John C.; Weierstall, Uwe; Beetz, Tobias; Jacobsen, Chris; Shapiro, David

    2006-01-01T23:59:59.000Z

    Coherent x-ray diffraction microscopy is a method of imaging nonperiodic isolated objects at resolutions limited, in principle, by only the wavelength and largest scattering angles recorded. We demonstrate x-ray diffraction imaging with high resolution in all three dimensions, as determined by a quantitative analysis of the reconstructed volume images. These images are retrieved from the three-dimensional diffraction data using no a priori knowledge about the shape or composition of the object, which has never before been demonstrated on a nonperiodic object. We also construct two-dimensional images of thick objects with greatly increased depth of focus (without loss of transverse spatial resolution). These methods can be used to image biological and materials science samples at high resolution with x-ray undulator radiation and establishes the techniques to be used in atomic-resolution ultrafast imaging at x-ray free-electron laser sources.

  19. Collimator selection for SPECT brain imaging: the advantage of high resolution

    SciTech Connect (OSTI)

    Mueller, S.P.; Polak, J.F.; Kijewski, M.F.; Holman, B.L.

    1986-11-01T23:59:59.000Z

    We compared a prototype long-bore (LB) high-resolution collimator with a low-energy, general-purpose collimator (LEGP) using 99mTc and /sup 123/I. The LB collimator provided a 56% improvement in tomographic resolution (autocorrelation width) over the LEGP for 99mTc; for /sup 123/I, the gain was 79%, providing substantially improved contrast for small structures. The sensitivity of the LB collimator, however, is only 32% of that of the LEGP. The imaging tasks to be performed on (/sup 123/I)IMP brain scans involve localization and discrimination of small, high-contrast brain structures and detection of abnormalities in shape, size, or uptake, rather than simple detection of lesions. Observer performance in such higher-order imaging tasks is known to depend on high spatial resolution, even at the cost of sensitivity. Patient studies confirmed that, for resolution-limited tasks, the increase in resolution outweighs the increased noise due to a loss in sensitivity. When the tomographic resolution of the LB collimator was degraded by smoothing to that of the LEGP, the noise in the LB images was lower than that of the LEGP by a factor of 2.9 for the same imaging time, demonstrating the advantage of high-resolution detectors and a smooth reconstruction filter over low-resolution detectors without smoothing. Therefore, collimators designed for high resolution, even at substantial cost in sensitivity, are expected to yield significant improvements for brain SPECT. Geometric calculations show that commercially available low-energy, high-resolution cast collimators promise to meet these requirements.

  20. The effects of digital elevation model resolution on the calculation and predictions of topographic wetness indices.

    SciTech Connect (OSTI)

    Drover, Damion, Ryan

    2011-12-01T23:59:59.000Z

    One of the largest exports in the Southeast U.S. is forest products. Interest in biofuels using forest biomass has increased recently, leading to more research into better forest management BMPs. The USDA Forest Service, along with the Oak Ridge National Laboratory, University of Georgia and Oregon State University are researching the impacts of intensive forest management for biofuels on water quality and quantity at the Savannah River Site in South Carolina. Surface runoff of saturated areas, transporting excess nutrients and contaminants, is a potential water quality issue under investigation. Detailed maps of variable source areas and soil characteristics would therefore be helpful prior to treatment. The availability of remotely sensed and computed digital elevation models (DEMs) and spatial analysis tools make it easy to calculate terrain attributes. These terrain attributes can be used in models to predict saturated areas or other attributes in the landscape. With laser altimetry, an area can be flown to produce very high resolution data, and the resulting data can be resampled into any resolution of DEM desired. Additionally, there exist many maps that are in various resolutions of DEM, such as those acquired from the U.S. Geological Survey. Problems arise when using maps derived from different resolution DEMs. For example, saturated areas can be under or overestimated depending on the resolution used. The purpose of this study was to examine the effects of DEM resolution on the calculation of topographic wetness indices used to predict variable source areas of saturation, and to find the best resolutions to produce prediction maps of soil attributes like nitrogen, carbon, bulk density and soil texture for low-relief, humid-temperate forested hillslopes. Topographic wetness indices were calculated based on the derived terrain attributes, slope and specific catchment area, from five different DEM resolutions. The DEMs were resampled from LiDAR, which is a laser altimetry remote sensing method, obtained from the USDA Forest Service at Savannah River Site. The specific DEM resolutions were chosen because they are common grid cell sizes (10m, 30m, and 50m) used in mapping for management applications and in research. The finer resolutions (2m and 5m) were chosen for the purpose of determining how finer resolutions performed compared with coarser resolutions at predicting wetness and related soil attributes. The wetness indices were compared across DEMs and with each other in terms of quantile and distribution differences, then in terms of how well they each correlated with measured soil attributes. Spatial and non-spatial analyses were performed, and predictions using regression and geostatistics were examined for efficacy relative to each DEM resolution. Trends in the raw data and analysis results were also revealed.

  1. Mixed phase clouds, cloud electrification and remote sensing.

    SciTech Connect (OSTI)

    Chylek, P. (Petr); Borel, C. C. (Christoph C.); Klett, James

    2004-01-01T23:59:59.000Z

    Most of hypothesis trying to explain charge separation in thunderstorm clouds require presence of ice and supercooled water. Thus the existence of ice or at least mixed phase regions near cloud tops should be a necessary (but not a sufficient) condition for development of lightning. We show that multispectral satellite based instruments, like the DOE MTI (Multispectral Thermal Imager) or NASA MODIS (Moderate Resolution Imaging Spectroradiometer), using the near infrared and visible spectral bands are able to distinguish between water, ice and mixed phase cloud regions. An analysis of the MTI images of mixed phase clouds - with spatial resolution of about 20 m - shows regions of pure water, pure ice as well as regions of water/ice mixtures. We suggest that multispectral satellite instruments may be useful for a short time forecast of lightning probabilities.

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

    SciTech Connect (OSTI)

    Peng, Sheng; Hu, Qinhong; Dultz, Stefan; Zhang, Ming

    2012-11-23T23:59:59.000Z

    X-raycomputedtomography (XCT) is a powerful tool for detecting the micro-scale porestructure and has been applied to many natural and synthetic porous media. However, due to the resolution limitations, either non-representative view of the sample or inaccurate results can be produced from the XCT image processing. In this paper, two XCT (micro-CT and CT with synchrotron radiation) with different resolutions of 12.7 ?m and 0.35 ?m, as well as mercury intrusion porosimetry (MIP) with a minimum detection limit of 3 nm, were used for Berea sandstone to investigate the effect of detecting resolution on the porestructure. Several key porestructure parameters, including porosity, pore size distribution, pore connectivity, surface area, hydraulic radius, and aspect ratio were analyzed in a manner of quantitative comparison between different resolutions of XCT and MIP. The low resolution XCT can capture the large-pore porosity, while overestimates the pore size and pore connectivity. The high resolution XCT is more accurate in describing the pore shape, porosity, pore size; however, it is not representative since narrower detecting pore size range and small volume represented. A representative element volume related to large-pore porosity and probably large-pore connectivity with diameter and height of 2.8 mm is obtained through scale effect analysis. Therefore, selecting an appropriate resolution should be a compromise between the pore size and the representative element volume for the specific property or process of interest.

  3. High-resolution retinal imaging using adaptive optics and Fourier-domain optical coherence tomography

    DOE Patents [OSTI]

    Olivier, Scot S. (Livermore, CA); Werner, John S. (Davis, CA); Zawadzki, Robert J. (Sacramento, CA); Laut, Sophie P. (Pasedena, CA); Jones, Steven M. (Livermore, CA)

    2010-09-07T23:59:59.000Z

    This invention permits retinal images to be acquired at high speed and with unprecedented resolution in three dimensions (4.times.4.times.6 .mu.m). The instrument achieves high lateral resolution by using adaptive optics to correct optical aberrations of the human eye in real time. High axial resolution and high speed are made possible by the use of Fourier-domain optical coherence tomography. Using this system, we have demonstrated the ability to image microscopic blood vessels and the cone photoreceptor mosaic.

  4. Optic for an endoscope/borescope having high resolution and narrow field of view

    DOE Patents [OSTI]

    Stone, Gary F.; Trebes, James E.

    2003-10-28T23:59:59.000Z

    An optic having optimized high spatial resolution, minimal nonlinear magnification distortion while at the same time having a limited chromatic focal shift or chromatic aberrations. The optic located at the distal end of an endoscopic inspection tool permits a high resolution, narrow field of view image for medical diagnostic applications, compared to conventional optics for endoscopic instruments which provide a wide field of view, low resolution image. The image coverage is over a narrow (<20 degrees) field of view with very low optical distortion (<5% pin cushion or barrel distortion. The optic is also optimized for best color correction as well as to aid medical diagnostics.

  5. Spectral resolution of the Liouvillian of the Lindblad master equation for a harmonic oscillator

    SciTech Connect (OSTI)

    Honda, Daigo [Institute of Physics, University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902 (Japan); Nakazato, Hiromichi; Yoshida, Motoyuki [Department of Physics, Waseda University, Okubo, Shinjuku-ku, Tokyo 169-8555 (Japan)

    2010-07-15T23:59:59.000Z

    A Lindblad master equation for a harmonic oscillator, which describes the dynamics of an open system, is formally solved. The solution yields the spectral resolution of the Liouvillian, that is, all eigenvalues and eigenprojections are obtained. This spectral resolution is discussed in depth in the context of the biorthogonal system and the rigged Hilbert space, and the contribution of each eigenprojection to expectation values of physical quantities is revealed. We also construct the ladder operators of the Liouvillian, which clarify the structure of the spectral resolution.

  6. High-resolution spectroscopic probes of collisions and half-collisions

    SciTech Connect (OSTI)

    Hall, G.E. [Brookhaven National Laboratory, Upton, NY (United States)

    1993-12-01T23:59:59.000Z

    Research in this program explores the dynamics of gas phase collisions and photodissociation by high-resolution laser spectroscopy. Simultaneous state and velocity detection frequently permits a determination of scalar or vector correlations among products. The correlated product distributions are always more informative, and often easier to interpret than the uncorrelated product state distributions. The authors have recently built an apparatus to record transient absorption spectra with 50 nS time resolution and 20 MHz frequency resolution using a single frequency Ti:sapphire laser. The photodissociation of NCCN and C{sub 2}H{sub 5}SCN at 193 nm is discussed.

  7. A 30 ps Timing Resolution for Single Photons with Multi-pixel Burle MCP-PMT

    SciTech Connect (OSTI)

    Va'vra, J.; Benitez, J.; Coleman, J.; Leith, D.W.G.S.; Mazaheri, G.; Ratcliff, B.; Schwiening, J.; /SLAC

    2006-07-05T23:59:59.000Z

    We have achieved {approx}30 psec single-photoelectron and {approx}12ps for multi-photoelectron timing resolution with a new 64 pixel Burle MCP-PMT with 10 micron microchannel holes. We have also demonstrated that this detector works in a magnetic field of 15kG, and achieved a single-photoelectron timing resolution of better than 60 psec. The study is relevant for a new focusing DIRC RICH detector for particle identification at future Colliders such as the super B-factory or ILC, and for future TOF techniques. This study shows that a highly pixilated MCP-PMT can deliver excellent timing resolution.

  8. Note: Spatial resolution of Fuji BAS-TR and BAS-SR imaging plates

    SciTech Connect (OSTI)

    Fiksel, G.; Marshall, F. J.; Mileham, C.; Stoeckl, C. [Laboratory for Laser Energetics, University of Rochester, 250 East River Rd., Rochester, New York 14623-1299 (United States)

    2012-08-15T23:59:59.000Z

    The spatial resolution of two types of imaging plates, Fuji BAS-TR and Fuji BAS-SR, has been measured using a knife-edge x-ray source of 8-keV Cu K{sub {alpha}} radiation. The values for the spatial resolution, defined as the distance between 10% and 90% levels of the edge spread function, are 94 {mu}m and 109 {mu}m, respectively. The resolution values are important for quantitative analysis of x-ray and particle imaging and spectroscopic diagnostics.

  9. HAT-P-34b-HAT-P-37b: FOUR TRANSITING PLANETS MORE MASSIVE THAN JUPITER ORBITING MODERATELY BRIGHT STARS

    SciTech Connect (OSTI)

    Bakos, G. A.; Hartman, J. D.; Csubry, Z.; Penev, K. [Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States); Torres, G.; Beky, B.; Latham, D. W.; Bieryla, A.; Quinn, S.; Szklenar, T.; Esquerdo, G. A.; Noyes, R. W. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States); Buchhave, L. A. [Niels Bohr Institute, University of Copenhagen, DK-2100, Denmark, and Centre for Star and Planet Formation, Natural History Museum of Denmark, DK-1350 Copenhagen (Denmark); Kovacs, G. [Konkoly Observatory, Budapest (Hungary); Shporer, A. [LCOGT, 6740 Cortona Drive, Santa Barbara, CA (United States); Fischer, D. A. [Astronomy Department, Yale University, New Haven, CT (United States); Johnson, J. A. [California Institute of Technology, Department of Astrophysics, MC 249-17, Pasadena, CA (United States); Howard, A. W.; Marcy, G. W. [Department of Astronomy, University of California, Berkeley, CA (United States); Sato, B., E-mail: gbakos@astro.princeton.edu [Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551 (Japan); and others

    2012-07-15T23:59:59.000Z

    We report the discovery of four transiting extrasolar planets (HAT-P-34b-HAT-P-37b) with masses ranging from 1.05 to 3.33 M{sub J} and periods from 1.33 to 5.45 days. These planets orbit relatively bright F and G dwarf stars (from V = 10.16 to V = 13.2). Of particular interest is HAT-P-34b which is moderately massive (3.33 M{sub J}), has a high eccentricity of e = 0.441 {+-} 0.032 at a period of P = 5.452654 {+-} 0.000016 days, and shows hints of an outer component. The other three planets have properties that are typical of hot Jupiters.

  10. Numerical simulations of rubber networks at moderate to high tensile strains using a purely enthalpic force extension curve for individual chains

    SciTech Connect (OSTI)

    Hanson, David Edward [Los Alamos National Laboratory

    2009-01-01T23:59:59.000Z

    We report the results of numerical simulations of random, three-dimensional, periodic, tetrafunctional networks in response to a volume-preserving tensile strain. For the intranode force, we use a polynomial fit to a purely enthalpic ab initio force extension curve for extended polyisoprene. The simulation includes a relaxation procedure to minimize the node forces and enforces chain rupture when the extension of a network chain reaches the ab initio rupture strain. For the reasonable assumption that the distribution of network chain lengths is Gaussian, we find that the calculated snap-back velocity, temperature increase due to chain ruptures and predicted tensile stress versus strain curve are consistent with experimental data in the moderate to high extension regime. Our results show that a perfect tetrafunctional polyisoprene network is extremely robust, capable of supporting tensile stresses at least a factor of 10 greater than what is observed experimentally.

  11. Feasibility Study of Moderately Accelerated Intensity-Modulated Radiotherapy Plus Concurrent Weekly Cisplatin After Induction Chemotherapy in Locally Advanced Head-and Neck Cancer

    SciTech Connect (OSTI)

    Morganti, Alessio G. [Department of Radiotherapy, 'John Paul II' Center for High Technology Research and Education in Biomedical Sciences, Campobasso (Italy); Mignogna, Samantha [Department of Palliative Therapies, 'John Paul II' Center for High Technology Research and Education in Biomedical Sciences, Campobasso (Italy); Deodato, Francesco; Massaccesi, Mariangela [Department of Radiotherapy, 'John Paul II' Center for High Technology Research and Education in Biomedical Sciences, Campobasso (Italy); Cilla, Savino [Department of Medical Physics, 'John Paul II' Center for High Technology Research and Education in Biomedical Sciences, Campobasso (Italy); Calista, Franco [Department of Palliative Therapies, 'John Paul II' Center for High Technology Research and Education in Biomedical Sciences, Campobasso (Italy); Serafini, Giovanni [Department of Head and Neck Surgery, General Hospital, Termoli (Italy); Digesu, Cinzia [Department of Radiotherapy, 'John Paul II' Center for High Technology Research and Education in Biomedical Sciences, Campobasso (Italy); Macchia, Gabriella, E-mail: gmacchia@rm.unicatt.i [Department of Radiotherapy, 'John Paul II' Center for High Technology Research and Education in Biomedical Sciences, Campobasso (Italy); Picardi, Vincenzo; Caravatta, Luciana [Department of Radiotherapy, 'John Paul II' Center for High Technology Research and Education in Biomedical Sciences, Campobasso (Italy); Di Lullo, Liberato [Department of Oncology, General Hospital, Isernia (Italy); Giglio, Gianfranco [Department of Oncology, General Hospital, Campobasso (Italy); Sallustio, Giuseppina [Department of Radiology, 'John Paul II' Center for High Technology Research and Education in Biomedical Sciences, Campobasso (Italy); Piermattei, Angelo [Department of Medical Physics, 'John Paul II' Center for High Technology Research and Education in Biomedical Sciences, Campobasso (Italy)

    2011-03-15T23:59:59.000Z

    Purpose: To evaluate the feasibility and efficacy of moderately accelerated intensity-modulated radiation therapy (IMRT) along with weekly cisplatin, after induction chemotherapy, in patients with locally advanced unresectable head and neck cancer (HNC). Methods and Materials: Patients with Stage III or IV locally advanced HNC, without progressive disease after three courses of induction chemotherapy, received concurrent chemo-IMRT (weekly cisplatin 30 mg/m{sup 2} plus simultaneous integrated boost IMRT). A total of 67.5 Gy in 30 fractions were delivered to primary tumor and involved nodes, 60 Gy in 30 fractions to high-risk nodal areas, and 55.5 Gy in 30 fractions to low-risk nodal areas. Results: In all, 36 patients (median age, 56 years) with International Union Against Cancer (UICC) Stage III (n = 5) and IV (n = 31) were included. Of the 36 patients, 17 had received CF (cisplatin and 5-fluorouracil (CF) and 19 had received docetaxel cisplatin and 5-fluorouracil (DCF). During concurrent chemoradiation, 11 of 36 patients (30.5%) experienced Grade III mucositis (CF, 47%; DCF, 15%; p < 0.04). Grade III pharyngeal-esophageal toxicity was observed in 5 of 19 patients (26.3%; CF, 0.0%; DCF, 26.3%; p = 0.02). Two patients died of complications (5.5%). After chemoradiation, the complete response rate was 63.8%. Two-year local control was 88.7%. Two-year progression free survival and overall survival were 74.5% and 60.9%, respectively. Conclusions: In our experience, a moderately accelerated chemo-IMRT was feasible after induction chemotherapy. However, a noteworthy early death rate of 5.5% was observed. Intensive supportive care strategies should be defined to better manage radiation-induced toxic effects. Longer follow-up is required to determine the incidence of late radiation toxicities and tumor control rates.

  12. High-resolution 18F-FDG PET with MRI for monitoring response to treatment in rheumatoid arthritis

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    of a dedicated breast PET/CT scanner during human imaging. Jhigh-resolution 18 F-FDG PET images (pseudocolor) overlaidMONTH High-resolution 18 F-FDG PET with MRI for monitoring

  13. Cellular delivery and site-specific targeting of organic fluorophores for super-resolution imaging in living cells

    E-Print Network [OSTI]

    Uttamapinant, Chayasith

    2013-01-01T23:59:59.000Z

    Recent advances in super-resolution fluorescence microscopy have pushed the spatial resolution of biological imaging down to a few nanometers. The key element to the development of such imaging modality is synthetic organic ...

  14. Council Resolution concerning the admission of the Islamic Republic of Pakistan as Associate Member State at CERN

    E-Print Network [OSTI]

    2014-01-01T23:59:59.000Z

    Council Resolution concerning the admission of the Islamic Republic of Pakistan as Associate Member State at CERN

  15. Potential impacts of vertical cable seismic: modeling, resolution and multiple attenuation

    E-Print Network [OSTI]

    Wilson, Ryan Justin

    2004-09-30T23:59:59.000Z

    Vertical cable seismic methods are becoming more relevant as we require high quality and high resolution seismic data in both land and marine environments. Our goal in this thesis is to demonstrate the impacts of vertical cable surveying...

  16. Design of electronics for a high-resolution, multi-material, and modular 3D printer

    E-Print Network [OSTI]

    Kwan, Joyce G

    2013-01-01T23:59:59.000Z

    Electronics for a high-resolution, multi-material, and modular 3D printer were designed and implemented. The driver for a piezoelectric inkjet print head can fire its nozzles with one of three droplet sizes ranging from 6 ...

  17. High resolution imaging and lithography using interference of light and surface plasmon waves

    E-Print Network [OSTI]

    Kim, Yang-Hyo

    2007-01-01T23:59:59.000Z

    The resolution of optical imaging and lithography is limited by the wave nature of light. Studies have been undertaken to overcome the diffraction limit for imaging and lithography. In our lab, the standing wave surface ...

  18. Conflict Management and Dispute Resolution Services May 2011 Read More about Conflict Management

    E-Print Network [OSTI]

    Yang, Zong-Liang

    . Dana, Daniel., Managing Differences: How to Build Better Relationships at Work and Home. (MConflict Management and Dispute Resolution Services May 2011 Read More about Conflict Management Management o Bullying Conflict and Culture Influence Mediation Negotiation Facilitation and Group Problem

  19. High resolution fossil fuel combustion CO2 emission fluxes for the United States

    E-Print Network [OSTI]

    Gurney, Kevin R.

    2010-01-01T23:59:59.000Z

    resolution fossil fuel combustion CO 2 emission fluxes for2002, includes detail on combustion technology and forty-atmosphere is that due to the combustion of fossil fuels and

  20. SEX DIFFERENCES IN THE HUMAN CONNECTOME: 4-TESLA HIGH ANGULAR RESOLUTION DIFFUSION IMAGING (HARDI)

    E-Print Network [OSTI]

    Thompson, Paul

    SEX DIFFERENCES IN THE HUMAN CONNECTOME: 4-TESLA HIGH ANGULAR RESOLUTION DIFFUSION IMAGING (HARDI diffusion imaging at 4 Tesla, we scanned 234 young adult twins and siblings (mean age: 23.4 ± 2.0 SD years

  1. A machine learning model of Manhattan air pollution at high spatial resolution

    E-Print Network [OSTI]

    Keeler, Rachel H. (Rachel Heiden)

    2014-01-01T23:59:59.000Z

    A machine-learning model was created to predict air pollution at high spatial resolution in Manhattan, New York using taxi trip data. Urban air pollution increases morbidity and mortality through respiratory and cardiovascular ...

  2. High resolution laser spectroscopy of cesium and rubidium molecules with optically induced coherence 

    E-Print Network [OSTI]

    Chen, Hui

    2006-10-30T23:59:59.000Z

    This work is devoted to the study of the quantum coherent effects in diatomic molecular systems by using high resolution laser spectroscopy. In particular, we have studied the rubidium diatomic molecular gaseous medium's absorption spectrum...

  3. Improvement of Ion-Beam Energy Resolution in a Solenoid-based Radioactive Nuclear Beam Facility

    E-Print Network [OSTI]

    Becchetti, Fred

    Improvement of Ion-Beam Energy Resolution in a Solenoid-based Radioactive Nuclear Beam Facility of Philosophy (Nuclear Engineering and Radiological Sciences) in The University of Michigan 2010 Doctoral

  4. Towards energy resolution at the statistical limit from a negative ion time projection chamber

    E-Print Network [OSTI]

    Peter Sorensen; Mike Heffner; Adam Bernstein; Josh Renner; Melinda Sweany

    2012-05-29T23:59:59.000Z

    We make a proof-of-principle demonstration that improved energy resolution can be obtained in a negative-ion time projection chamber, by individually counting each electron produced by ionizing radiation.

  5. alto high-resolution search: Topics by E-print Network

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

    2010-10-22 7 The Search for Anisotropy in the Arrival Directions of Ultra-High Energy Cosmic Rays Observed by the High Resolution Fly's Eye Detector in Monocular Mode...

  6. alveolitis high-resolution computed: Topics by E-print Network

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

    Geiger, Cathleen 45 High-resolution x-ray telescopes CERN Preprints Summary: High-energy astrophysics is a relatively young scientific field, made possible by space-borne...

  7. High-resolution three-dimensional optical coherence tomography imaging of kidney microanatomy ex vivo

    E-Print Network [OSTI]

    Chen, Yu

    Optical coherence tomography (OCT) is an emerging medical imaging technology that enables high-resolution, noninvasive, cross-sectional imaging of microstructure in biological tissues in situ and in real time. When combined ...

  8. High-resolution 7-Tesla fMRI of Human Hippocampal Subfields during Associative Learning.

    E-Print Network [OSTI]

    2014-01-01T23:59:59.000Z

    fMRI in the Human Brain at 7 Tesla: Combining Reduced Field-High-resolution 7-Tesla fMRI of Human Hippocampal Subfieldsrobustly using FMRI at 7 tesla. Journal of Neuroimaging, 23(

  9. High resolution CMRO2 in visual cortex of macaca mulatta Y. Bohraus1

    E-Print Network [OSTI]

    the contribution of the vascular system and neural energy consumption. Measuring CMRO2 allows one to determine with previous MR and PET results such as reviewed in [7]. In conclusion, we showed that high resolution CMRO2

  10. HIGH-RESOLUTION X-RAY SPECTROSCOPY OF THE MULTIPHASE INTERSTELLAR MEDIUM TOWARD Cyg X-2

    E-Print Network [OSTI]

    Schulz, Norbert S.

    High-resolution X-ray absorption spectroscopy is a powerful diagnostic tool for probing chemical and physical properties of the interstellar medium (ISM) at various phases. We present detections of K transition absorption ...

  11. Revisiting Bug Triage and Resolution Practices Olga Baysal, Reid Holmes, and Michael W. Godfrey

    E-Print Network [OSTI]

    Godfrey, Michael W.

    Revisiting Bug Triage and Resolution Practices Olga Baysal, Reid Holmes, and Michael W. Godfrey part of the software development process. In large software projects such as Eclipse or Firefox

  12. Super-resolution wide-field optical microscopy by use of Evanescent standing waves

    E-Print Network [OSTI]

    Chung, Euiheon

    2007-01-01T23:59:59.000Z

    The development of high resolution, high speed imaging techniques allows the study of dynamical processes in biological systems. Optical fluorescence microscopy is an essential tool for investigations in many disciplines ...

  13. New optics technology opens door to high-resolution atomic-level...

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

    optics technology opens door to high-resolution atomic-level hard X-ray studies June 8, 2015 Tweet EmailPrint An international collaboration involving two U.S. Department of Energy...

  14. ARM: Short Wave Flux Analysis: 15-min resolution on SIRS data, Long algorithm

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

    Stoffel, Tom; Kay, Bev; Habte, Aron; Anderberg, Mary; Kutchenreiter, Mark

    Short Wave Flux Analysis: 15-min resolution on SIRS data, Long algorithm. Measurements began in January, 1994, and have continued to the present time. Data collected are from the Southern Great Plains (SGP) location.

  15. JOIDES Resolution Drill Ship Drill into Indian Ridge MOHO Hole Cleaning Study

    E-Print Network [OSTI]

    Lindanger, Catharina

    2014-05-03T23:59:59.000Z

    The Integrated Ocean Drilling Program (IODP) uses a variety of technology for use in its deep water scientific research, including the Joint Oceanographic Institutions for Deep Earth Sampling (JOIDES) Resolution (JR) drill ship. The JR drill ship...

  16. Low-Resolution Density Maps from Atomic Models: How Stepping ``Back'' Can Be a Step ``Forward''

    E-Print Network [OSTI]

    Baker, Timothy S.

    Low-Resolution Density Maps from Atomic Models: How Stepping ``Back'' Can Be a Step ``Forward a tremendous impact on our discovery and understand- ing of basic life processes. Such structural informa- tion

  17. Influence of air quality model resolution on uncertainty associated with health impacts

    E-Print Network [OSTI]

    Thompson, Tammy M.

    We use regional air quality modeling to evaluate the impact of model resolution on uncertainty associated with the human health benefits resulting from proposed air quality regulations. Using a regional photochemical model ...

  18. A Micro-Economic Approach to Conflict Resolution in Mobile Computing

    E-Print Network [OSTI]

    Mascolo, Cecilia

    A Micro-Economic Approach to Conflict Resolution in Mobile Computing Licia Capra, Wolfgang Emmerich and Cecilia Mascolo Dept. of Computer Science University College London Gower Street, London WC1E 6BT, UK {L.Capra|W.Emmerich

  19. Identification of honeycomb sandwich properties by high-resolution modal analysis

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    implementations. The high-resolution modal analysis (HRMA) technique [5] is an alternative to the FT of the modal analysis of a large panel (lx,y/h 80). The HRMA technique is used to estimate modal frequencies

  20. High resolution melt analysis (HRMA) for detection of CRISPR indels Andrew Bassett 19th

    E-Print Network [OSTI]

    High resolution melt analysis (HRMA) for detection of CRISPR indels Andrew Bassett 19th June 2013 approximately 1 ul per 10 ul PCR reaction HRMA analysis 1. Design primers to amplify 100-200 bp product across

  1. Dispute Resolution Process Analysis Prepared for the Colorado Department of Transportation

    E-Print Network [OSTI]

    Estes, Jerome K.

    2012-07-27T23:59:59.000Z

    The use of dispute review boards (DRBs) as a method of alternative dispute resolution (ADR) on construction projects is a relatively new practice. The results of this research promote DRB usage. This report is meant to ...

  2. Surface Pressure Observations from Smartphones:3 A Potential Revolution for High-Resolution Weather Prediction?4

    E-Print Network [OSTI]

    Mass, Clifford F.

    -Resolution Weather Prediction?4 5 Clifford F. Mass1 and Luke E. Madaus6 Department of Atmospheric Sciences7 1 Corresponding author Professor Clifford F. Mass Department of Atmospheric Sciences Box 351640 about three-dimensional55 atmosph

  3. Measurement of transient atomic displacements in thin films with picosecond and femtometer resolution

    E-Print Network [OSTI]

    resolution M. Kozina,1,2 T. Hu,3,4 J. S. Wittenberg,4 E. Szilagyi,4,5 M. Trigo,1,4 T. A. Miller,3,4 C. Uher,6

  4. Start 2015 with an #EnergyResolution to Save Money and Energy...

    Energy Savers [EERE]

    and that's great, but I challenge you to also create an EnergyResolution that will save money while saving energy all year long. The Energy Saver bloggers were up to the...

  5. High-Resolution Characterization of Reservoir Heterogeneity and Connectivity in Clastic Environments

    E-Print Network [OSTI]

    Hull, Thomas Frederick

    2011-10-21T23:59:59.000Z

    This study developed new concepts and interpretative methods for mapping reservoir heterogeneity and connectivity of a fault controlled Wilcox clastic reservoir in Texas, USA. The application of high-resolution seismic enhancement in this study...

  6. Distributed Resolution of Network Congestion and Potential Deadlock Using Reservation-based Scheduling

    E-Print Network [OSTI]

    Pinkston, Timothy M.

    Distributed Resolution of Network Congestion and Potential Deadlock Using Reservation multiprocessor servers and loosely coupled (and, oftentimes, heterogeneous) distributed network Abstract Efficient and reliable communication is essential for achieving high performance in a networked

  7. Ion implantation for figure correction of high-resolution x-ray telescope mirrors

    E-Print Network [OSTI]

    Chalifoux, Brandon D

    2014-01-01T23:59:59.000Z

    Fabricating mirrors for future high-resolution, large-aperture x-ray telescopes continues to challenge the x-ray astronomy instrumentation community. Building a large-aperture telescope requires thin, lightweight mirrors; ...

  8. HeadLock : wide-range head pose estimation for low resolution video

    E-Print Network [OSTI]

    DeCamp, Philip (Philip James)

    2008-01-01T23:59:59.000Z

    This thesis focuses on data mining technologies to extract head pose information from low resolution video recordings. Head pose, as an approximation of gaze direction, is a key indicator of human behavior and interaction. ...

  9. Hadronic energy resolution of a highly granular scintillator-steel hadron calorimeter using software compensation techniques

    E-Print Network [OSTI]

    CALICE Collaboration; C. Adloff; J. Blaha; J. -J. Blaising; C. Drancourt; A. Espargiličre; R. Gaglione; N. Geffroy; Y. Karyotakis; J. Prast; G. Vouters; K. Francis; J. Repond; J. Smith; L. Xia; E. Baldolemar; J. Li; S. T. Park; M. Sosebee; A. P. White; J. Yu; T. Buanes; G. Eigen; Y. Mikami; N. K. Watson; T. Goto; G. Mavromanolakis; M. A. Thomson; D. R. Ward; W. Yan; D. Benchekroun; A. Hoummada; Y. Khoulaki; M. Benyamna; C. Cârloganu; F. Fehr; P. Gay; S. Manen; L. Royer; G. C. Blazey; A. Dyshkant; J. G. R. Lima; V. Zutshi; J. -Y. Hostachy; L. Morin; U. Cornett; D. David; G. Falley; K. Gadow; P. Göttlicher; C. Günter; B. Hermberg; S. Karstensen; F. Krivan; A. -I. Lucaci-Timoce; S. Lu; B. Lutz; S. Morozov; V. Morgunov; M. Reinecke; F. Sefkow; P. Smirnov; M. Terwort; A. Vargas-Trevino; N. Feege; E. Garutti; I. Marchesini; M. Ramilli; P. Eckert; T. Harion; A. Kaplan; H. -Ch. Schultz-Coulon; W. Shen; R. Stamen; A. Tadday; B. Bilki; E. Norbeck; Y. Onel; G. W. Wilson; K. Kawagoe; P. D. Dauncey; A. -M. Magnan; M. Wing; F. Salvatore; E. Calvo Alamillo; M. -C. Fouz; J. Puerta-Pelayo; V. Balagura; B. Bobchenko; M. Chadeeva; M. Danilov; A. Epifantsev; O. Markin; R. Mizuk; E. Novikov; V. Rusinov; E. Tarkovsky; N. Kirikova; V. Kozlov; P. Smirnov; Y. Soloviev; P. Buzhan; B. Dolgoshein; A. Ilyin; V. Kantserov; V. Kaplin; A. Karakash; E. Popova; S. Smirnov; C. Kiesling; S. Pfau; K. Seidel; F. Simon; C. Soldner; M. Szalay; M. Tesar; L. Weuste; J. Bonis; B. Bouquet; S. Callier; P. Cornebise; Ph. Doublet; F. Dulucq; M. Faucci Giannelli; J. Fleury; H. Li; G. Martin-Chassard; F. Richard; Ch. de la Taille; R. Pöschl; L. Raux; N. Seguin-Moreau; F. Wicek; M. Anduze; V. Boudry; J-C. Brient; D. Jeans; P. Mora de Freitas; G. Musat; M. Reinhard; M. Ruan; H. Videau; B. Bulanek; J. Zacek; J. Cvach; P. Gallus; M. Havranek; M. Janata; J. Kvasnicka; D. Lednicky; M. Marcisovsky; I. Polak; J. Popule; L. Tomasek; M. Tomasek; P. Ruzicka; P. Sicho; J. Smolik; V. Vrba; J. Zalesak; B. Belhorma; H. Ghazlane; T. Takeshita; S. Uozumi; J. Sauer; S. Weber; C. Zeitnitz

    2012-09-27T23:59:59.000Z

    The energy resolution of a highly granular 1 m3 analogue scintillator-steel hadronic calorimeter is studied using charged pions with energies from 10 GeV to 80 GeV at the CERN SPS. The energy resolution for single hadrons is determined to be approximately 58%/sqrt(E/GeV}. This resolution is improved to approximately 45%/sqrt(E/GeV) with software compensation techniques. These techniques take advantage of the event-by-event information about the substructure of hadronic showers which is provided by the imaging capabilities of the calorimeter. The energy reconstruction is improved either with corrections based on the local energy density or by applying a single correction factor to the event energy sum derived from a global measure of the shower energy density. The application of the compensation algorithms to Geant4 simulations yield resolution improvements comparable to those observed for real data.

  10. Simultaneous computational discovery of DNA regulatory motifs and transcription factor binding constraints at high spatial resolution

    E-Print Network [OSTI]

    Guo, Yuchun

    2012-01-01T23:59:59.000Z

    I present three novel computational methods to address the challenge of identifying protein-DNA interactions at high spatial resolution from noisy ChIP-Seq data. I first present the genome positioning system (GPS) algorithm ...

  11. High-resolution quantification of groundwater flux using a heat tracer: laboratory sandbox tests

    E-Print Network [OSTI]

    Konetchy, Brant Evan

    2014-12-31T23:59:59.000Z

    Groundwater flux is the most critical factor controlling contaminant transport in aquifers. High-resolution information about groundwater flux and its variability is essential to properly assessing and remediating contamination sites. Recently, we...

  12. Turbo ASL: Arterial Spin Labeling With Higher SNR and Temporal Resolution

    E-Print Network [OSTI]

    Sereno, Martin

    Turbo ASL: Arterial Spin Labeling With Higher SNR and Temporal Resolution Eric C. Wong,* Wen the ASL SNR per image. We refer to this modified technique as turbo ASL. THEORY In pulsed ASL techniques

  13. High-Angular-Resolution Microbeam X-Ray Diffraction with CCD Detector

    SciTech Connect (OSTI)

    Imai, Yasuhiko; Kimura, Shigeru; Sakaia, Akira [Japan Synchrotron Radiation Research Institute, SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198 (Japan); Sakata, Osami [Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, Osaka 670-8531 (Japan)

    2010-04-06T23:59:59.000Z

    We have introduced a CCD-type two-dimensional X-ray detector for a microbeam X-ray diffraction system using synchrotron radiation, so that we can measure local reciprocal space maps (RSM) of samples rapidly. A local RSM of a strain-relaxed SiGe 004 grown on a Si (001) substrate was measured in higher-angular-resolution and faster than a conventional way. The measurement was achieved in 1 h 40 min. with the 2theta resolution of 80 murad and the spatial resolution of 1.4(h)x0.5(v) {mu}m{sup 2}. The introduction of the CCD enabled us to measure RSMs at many points in a sample, that is, the distribution of strain fields and lattice tilts can be revealed in high-angular- and high-spatial-resolution.

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

    E-Print Network [OSTI]

    Walters, Shelby Lynn

    2008-07-28T23:59:59.000Z

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

  15. Multi-Sensor Fusion of Electro-Optic and Infrared Signals for High Resolution Visible Images: Part II

    E-Print Network [OSTI]

    of high resolution and low noise level, but they cannot reflect information about the temperature the properties of low resolution and high noise level, but IR images can reflect information about temperature variation of objects in the daytime via high-resolution EO images. The proposed novel framework

  16. Results from the High-Resolution Fly's Eye (HiRes) Experiment

    E-Print Network [OSTI]

    Aspen 4/06/05 1 Results from the High-Resolution Fly's Eye (HiRes) Experiment Charles Jui (HiRes) University of Utah Physics at the End of the Galactic Cosmic Ray Spectrum Aspen Apr 26-30, 2005 #12;Aspen 4 · Anisotropy · Composition · Proton-air cross-section measurement #12;Aspen 4/06/05 3 The High Resolution Fly

  17. A High-resolution Spectrum of the R CrB Star V2552 Ophiuchi

    E-Print Network [OSTI]

    N. Kameswara Rao; David L. Lambert

    2003-08-25T23:59:59.000Z

    Photometry and low-resolution spectroscopy have added V2552 Oph to the rare class of R Coronae Borealis variables. We confirm this classification of V2552 Oph through a comparison of our high-resolution optical spectrum of this star and that of R CrB and other F-type members of the class. We show that V2552 Oph most closely resembles Y Mus and FH Sct, stars in which Sr, Y, and Zr are enhanced.

  18. Acceptance and resolution simulation studies for the dielectron spectrometer HADES at GSI

    E-Print Network [OSTI]

    R. Schicker; A. Brenschede; K. Garrow; H. Schoen; A. Balanda; H. Bokemeyer; J. Friese; W. Karig; P. Kienle; W. Koenig; W. Kuehn; F. Lefevre; V. Metag; G. Roche; P. Salabura; A. Schroeter; J. Stroth; H. Tsertos

    1996-05-21T23:59:59.000Z

    Design studies for a second generation Dilepton Spectrometer to be built at the SIS accelerator of GSI are presented. The basic design parameters of this system are specified and the different detector components for charged particle tracking and for lepton identification are described. The geometrical acceptance for lepton pairs is given. Results on single track momentum resolution and on lepton pair mass resolution are reported.

  19. Calculation of the spatial resolution in two-photon absorption spectroscopy applied to plasma diagnosis

    SciTech Connect (OSTI)

    Garcia-Lechuga, M. [Departamento de Física Teórica, Atómica y Óptica, Universidad de Valladolid, 47011-Valladolid (Spain); Laser Processing Group, Instituto de Óptica “Daza de Valdés,” CSIC, 28006-Madrid (Spain); Fuentes, L. M. [Departamento de Física Aplicada, Universidad de Valladolid, 47011-Valladolid (Spain); Grützmacher, K.; Pérez, C., E-mail: concha@opt.uva.es; Rosa, M. I. de la [Departamento de Física Teórica, Atómica y Óptica, Universidad de Valladolid, 47011-Valladolid (Spain)

    2014-10-07T23:59:59.000Z

    We report a detailed characterization of the spatial resolution provided by two-photon absorption spectroscopy suited for plasma diagnosis via the 1S-2S transition of atomic hydrogen for optogalvanic detection and laser induced fluorescence (LIF). A precise knowledge of the spatial resolution is crucial for a correct interpretation of measurements, if the plasma parameters to be analysed undergo strong spatial variations. The present study is based on a novel approach which provides a reliable and realistic determination of the spatial resolution. Measured irradiance distribution of laser beam waists in the overlap volume, provided by a high resolution UV camera, are employed to resolve coupled rate equations accounting for two-photon excitation, fluorescence decay and ionization. The resulting three-dimensional yield distributions reveal in detail the spatial resolution for optogalvanic and LIF detection and related saturation due to depletion. Two-photon absorption profiles broader than the Fourier transform-limited laser bandwidth are also incorporated in the calculations. The approach allows an accurate analysis of the spatial resolution present in recent and future measurements.

  20. The Separate Physics and Dynamics Experiment (SPADE) framework for determining resolution awareness: A case study of microphysics

    SciTech Connect (OSTI)

    Gustafson, William I.; Ma, Po-Lun; Xiao, Heng; Singh, Balwinder; Rasch, Philip J.; Fast, Jerome D.

    2013-08-29T23:59:59.000Z

    The ability to use multi-resolution dynamical cores for weather and climate modeling is pushing the atmospheric community towards developing scale aware or, more specifically, resolution aware parameterizations that will function properly across a range of grid spacings. Determining the resolution dependence of specific model parameterizations is difficult due to strong resolution dependencies in many pieces of the model. This study presents the Separate Physics and Dynamics Experiment (SPADE) framework that can be used to isolate the resolution dependent behavior of specific parameterizations without conflating resolution dependencies from other portions of the model. To demonstrate the SPADE framework, the resolution dependence of the Morrison microphysics from the Weather Research and Forecasting model and the Morrison-Gettelman microphysics from the Community Atmosphere Model are compared for grid spacings spanning the cloud modeling gray zone. It is shown that the Morrison scheme has stronger resolution dependence than Morrison-Gettelman, and that the ability of Morrison-Gettelman to use partial cloud fractions is not the primary reason for this difference. This study also discusses how to frame the issue of resolution dependence, the meaning of which has often been assumed, but not clearly expressed in the atmospheric modeling community. It is proposed that parameterization resolution dependence can be expressed in terms of "resolution dependence of the first type," RA1, which implies that the parameterization behavior converges towards observations with increasing resolution, or as "resolution dependence of the second type," RA2, which requires that the parameterization reproduces the same behavior across a range of grid spacings when compared at a given coarser resolution. RA2 behavior is considered the ideal, but brings with it serious implications due to limitations of parameterizations to accurately estimate reality with coarse grid spacing. The type of resolution awareness developers should target in their development depends upon the particular modeler’s application.