Sample records for ice core graphics

  1. ARM - Ice Cores

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006Datastreamstwrcam40m DocumentationJanuary 9, 2009 [Events, FeatureListGeneralPastIce Cores Outreach Home Room

  2. Using ice cores from the East Antarctic Ice Sheet, scientists have been able to study

    E-Print Network [OSTI]

    Using ice cores from the East Antarctic Ice Sheet, scientists have been able to study ice's ice sheets. Ice sheets are huge areas of permanent ice. There are only three ice sheets on Earth: the Greenland Ice Sheet, the West Antarctic Ice Sheet, and the East Antarctic Ice Sheet. The Greenland Ice Sheet

  3. Ice chemistry in starless molecular cores

    E-Print Network [OSTI]

    Kalvans, Juris

    2015-01-01T23:59:59.000Z

    Starless molecular cores are natural laboratories for interstellar molecular chemistry research. The chemistry of ices in such objects was investigated with a three-phase (gas, surface, and mantle) model. We considered the center part of five starless cores, with their physical conditions derived from observations. The ice chemistry of oxygen, nitrogen, sulfur, and complex organic molecules (COMs) was analyzed. We found that an ice-depth dimension, measured, e.g., in monolayers, is essential for modeling of chemistry in interstellar ices. Particularly, the H2O:CO:CO2:N2:NH3 ice abundance ratio regulates the production and destruction of minor species. It is suggested that photodesorption during core collapse period is responsible for high abundance of interstellar H2O2 and O2H, and other species synthesized on the surface. The calculated abundances of COMs in ice were compared to observed gas-phase values. Smaller activation barriers for CO and H2CO hydrogenation may help explain the production of a number of...

  4. white paper, 9 March 2009 An ice core to reconstruct Greenland ice sheet mass balance

    E-Print Network [OSTI]

    Box, Jason E.

    white paper, 9 March 2009 1 An ice core to reconstruct Greenland a handful of years suggest a profound Greenland ice sheet mass balance sensitivity (2000) found that the Greenland ice sheet lost as much as 2/3 its current

  5. Holocene-Late Pleistocene Climatic Ice Core Records from Qinghai-Tibetan Plateau

    E-Print Network [OSTI]

    Howat, Ian M.

    for affecting large-scale climate. In 1987, three ice cores were recovered to bedrock from the Dunde ice cap. XIE Three ice cores to bedrock from the Dunde ice cap on the north-central Qinghai- Tibetan Plateau of ago. T HE DUNDE ICE CAP (38°06'N, 96°24'E) is located in a desert envi- ronment between the highest

  6. Gas ageice age differences and the chronology of the Vostok ice core, M. L. Bender,1

    E-Print Network [OSTI]

    Chappellaz, Jérôme

    Gas age­ice age differences and the chronology of the Vostok ice core, 0­100 ka M. L. Bender,1 G. [1] Gas is trapped in polar ice at depths of $50­120 m and is therefore significantly younger than cores (Vostok, Dome Fuji, and Dome C). We recorrelate the gas records of Vostok and Greenland Ice Sheet

  7. Sources of uncertainty in ice core data A contribution to the Workshop on

    E-Print Network [OSTI]

    Sources of uncertainty in ice core data A contribution to the Workshop on Reducing and Representing - 11, 2008 Eric J. Steig, University of Washington Seattle, WA 98195 1. Background Ice cores provide of these species (among them aerosols and greenhouse gases, and of course snow accumulation). Ice core records

  8. Development of a Graphical User Interface for In-Core Fuel Management Using MCODE

    E-Print Network [OSTI]

    Romano, Paul Kollath

    In the present work, a graphical user interface is developed to automate in-core fuel management using MCODE, an MCNP-ORIGEN linkage code. Data abstraction is achieved by means of five object classes that define the run, ...

  9. Historical and future black carbon deposition on the three ice caps: Ice core measurements and model simulations from 1850 to 2100

    E-Print Network [OSTI]

    Historical and future black carbon deposition on the three ice caps: Ice core measurements black carbon deposition on the three ice caps: Ice core measurements and model simulations from 1850 tends to enhance snow and ice melting due to the absorption caused by the increased BC deposition

  10. Where might we find evidence of a Last Interglacial West Antarctic Ice Sheet collapse in Antarctic ice core records?

    E-Print Network [OSTI]

    Siddall, Mark

    increased melting from valley glaciers and small ice caps (estimated ~0.6±0.1 m, Radi and Hock, 2010), oceanWhere might we find evidence of a Last Interglacial West Antarctic Ice Sheet collapse in Antarctic ice core records? S.L. Bradley a, , M. Siddall a , G.A. Milne b , V. Masson-Delmotte c , E. Wolff d

  11. Feasibility of reconstructing paleoatmospheric records of selected alkanes, methyl halides, and sulfur gases from Greenland ice cores

    E-Print Network [OSTI]

    Aydin, M.; Williams, M. B; Saltzman, E. S

    2007-01-01T23:59:59.000Z

    firn and ice at Summit, Greenland, J. Geophys. Res. , 98,AL. : TRACE GASES IN GREENLAND ICE CORE ¨ . Andreae Kettle,and sulfur gases from Greenland ice cores M. Aydin, 1 M. B.

  12. Ion fractionation and percolation in ice cores with seasonal melting John C. Moore*, Aslak Grinsted **

    E-Print Network [OSTI]

    Moore, John

    and with the type of data that was expected to come from ice caps with seasonal melt. The objective of this paperIon fractionation and percolation in ice cores with seasonal melting John C. Moore*, Aslak Grinsted that suffer limited seasonal melting. We show that the impact in the case of at least one Svalbard ice core

  13. Ice cores from Svalbarduseful archives of past climate and pollution history

    E-Print Network [OSTI]

    Moore, John

    Ice cores from the relatively low-lying ice caps in Svalbard have not been widely exploitedIce cores from Svalbard­­useful archives of past climate and pollution history Elisabeth Isaksson a in climatic and environmental studies due to uncertainties about the effect of melt water percolation. However

  14. Methyl chloride variability in the Taylor Dome ice core during the Holocene

    E-Print Network [OSTI]

    Verhulst, Kristal R; Aydin, Murat; Saltzman, Eric S

    2013-01-01T23:59:59.000Z

    in the Taylor Dome ice core during the Holocene Kristal R.2005GB002680. Lee-Taylor, J. , and K. R. Redeker (2005),

  15. Modeling Climate and Production-related Impacts on Ice-core Beryllium-10

    E-Print Network [OSTI]

    Modeling Climate and Production-related Impacts on Ice-core Beryllium-10 Christy Veeder Submitted Modeling Climate and Production-related Impacts on Ice-core Beryllium-10 Christy Veeder I use the Goddard Institute for Space Studies ModelE general circulation model to ex- amine the how beryllium-10, a cosmogenic

  16. CO2 & global temperature: Analysis of ice core and marine sediment data in

    E-Print Network [OSTI]

    Sengun, Mehmet Haluk

    CO2 & global temperature: Analysis of ice core and marine sediment data in combination with modeling of marine reservoir ages Gerrit Lohmann & Martin Butzin #12;Deglaciation CO2 vs. global temperature Ice cores: Temperature leads CO2 People (mainly outside the scientific comunity) use

  17. Technique for continuous high-resolution analysis of trace substances in firn and ice cores

    SciTech Connect (OSTI)

    Roethlisberger, R.; Bigler, M.; Hutterli, M.; Sommer, S.; Stauffer, B.; Junghans, H.G.; Wagenbach, D.

    2000-01-15T23:59:59.000Z

    The very successful application of a CFA (Continuous flow analysis) system in the GRIP project (Greenland Ice Core Project) for high-resolution ammonium, calcium, hydrogen peroxide, and formaldehyde measurements along a deep ice core led to further development of this analysis technique. The authors included methods for continuous analysis technique. The authors included methods for continuous analysis of sodium, nitrate, sulfate, and electrolytical conductivity, while the existing methods have been improved. The melting device has been optimized to allow the simultaneous analysis of eight components. Furthermore, a new melter was developed for analyzing firn cores. The system has been used in the frame of the European Project for Ice Coring in Antarctica (EPICA) for in-situ analysis of several firn cores from Dronning Maud Land, Antarctica, and for the new ice core drilled at Dome C, Antarctica.

  18. 115 year ice-core data from Akademii Nauk ice cap, Severnaya Zemlya: high-resolution record of Eurasian Arctic climate change

    E-Print Network [OSTI]

    Fischer, Hubertus

    ice core has been drilled within the framework of the European Project for Ice Coring in Antarctica of Antarctica. Drilling reached bedrock during the last field season 2005/06 providing ice over a time span. Since Ca2+ is derived from terrestrial dust and marine sources, the non-sea-salt calcium concentrations

  19. The Design and Performance of IceCube DeepCore

    E-Print Network [OSTI]

    The IceCube Collaboration

    2011-09-25T23:59:59.000Z

    The IceCube neutrino observatory in operation at the South Pole, Antarctica, comprises three distinct components: a large buried array for ultrahigh energy neutrino detection, a surface air shower array, and a new buried component called DeepCore. DeepCore was designed to lower the IceCube neutrino energy threshold by over an order of magnitude, to energies as low as about 10 GeV. DeepCore is situated primarily 2100 m below the surface of the icecap at the South Pole, at the bottom center of the existing IceCube array, and began taking physics data in May 2010. Its location takes advantage of the exceptionally clear ice at those depths and allows it to use the surrounding IceCube detector as a highly efficient active veto against the principal background of downward-going muons produced in cosmic-ray air showers. DeepCore has a module density roughly five times higher than that of the standard IceCube array, and uses photomultiplier tubes with a new photocathode featuring a quantum efficiency about 35% higher than standard IceCube PMTs. Taken together, these features of DeepCore will increase IceCube's sensitivity to neutrinos from WIMP dark matter annihilations, atmospheric neutrino oscillations, galactic supernova neutrinos, and point sources of neutrinos in the northern and southern skies. In this paper we describe the design and initial performance of DeepCore.

  20. Lomonosovfonna and Holtedahlfonna ice cores reveal eastwest disparities of the Spitsbergen environment since AD 1700

    E-Print Network [OSTI]

    Howat, Ian M.

    and the northernmost Norwegian coast. The location of Svalbard, at the southern edge of the permanent sea-ice coverLomonosovfonna and Holtedahlfonna ice cores reveal east­west disparities of the Spitsbergen and Atmospheric Research Utrecht, Utrecht University, Utrecht, The Netherlands 6 Norwegian Polar Institute, Fram

  1. High-resolution variations in size, number and arrangement of air bubbles in the EPICA DML (Antarctica) ice core

    E-Print Network [OSTI]

    Garbe, Christoph S.

    (Antarctica) ice core Verena BENDEL,1Ã Kai J. UELTZHO¨ FFER,2 Johannes FREITAG,3 Sepp KIPFSTUHL,3 Werner F bubbles in the EPICA Dronning Maud Land (EDML) (Antarctica) ice core, down to the end of the bubble with the palaeo-temperature proxy, dd18 O, and the dust concentration, which means that in Holocene ice

  2. Z .Cold Regions Science and Technology 28 1998 189202 Antifreeze thermal ice core drilling: an effective approach to the

    E-Print Network [OSTI]

    Howat, Ian M.

    Z .Cold Regions Science and Technology 28 1998 189­202 Antifreeze thermal ice core drilling Antifreeze thermal electric drills have a long history of ice drilling in temperate, subpolar and polar the past 25 years. A modified version of the antifreeze thermal electric ice coring drill has recently been

  3. Comparison of analytical results for chloride, sulfate and nitrate obtained from adjacent ice core samples by two ion

    E-Print Network [OSTI]

    Moore, John

    and sulfate but not for nitrate. 2% of the data indicate real differences in concentrations across the ice atmosphere. Ice core data are widely used to understand environmental and climate processes in the past.1 suited for the analysis of low concentrations of soluble ions in ice core samples without pretreatment.5

  4. Instruments and Methods Portable system for intermediate-depth ice-core drilling

    E-Print Network [OSTI]

    Howat, Ian M.

    Instruments and Methods Portable system for intermediate-depth ice-core drilling V. Zagorodnov, L Road, Columbus, Ohio 43210-1002, U.S.A. ABSTRACT. A lightweight, portable drilling system for coring up to 500 m depths has been developed and field-tested. The drilling system includes four major components

  5. Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period

    E-Print Network [OSTI]

    Price, P. Buford

    Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period R ash layers determined by remote optical borehole logging and core assays. We find that the Antarctic. These globally coincident volcanics were associated with abrupt cooling, often simultaneous with onsets or sudden

  6. Low time resolution analysis of polar ice cores cannot detect impulsive nitrate events

    E-Print Network [OSTI]

    Smart, D F; Melott, A L; Laird, C M

    2015-01-01T23:59:59.000Z

    Ice cores are archives of climate change and possibly large solar proton events (SPEs). Wolff et al. (2012) used a single event, a nitrate peak in the GISP2-H core, which McCracken et al. (2001a) time associated with the poorly quantified 1859 Carrington event, to discredit SPE-produced, impulsive nitrate deposition in polar ice. This is not the ideal test case. We critique the Wolff et al. analysis and demonstrate that the data they used cannot detect impulsive nitrate events because of resolution limitations. We suggest re-examination of the top of the Greenland ice sheet at key intervals over the last two millennia with attention to fine resolution and replicate sampling of multiple species. This will allow further insight into polar depositional processes on a sub-seasonal scale, including atmospheric sources, transport mechanisms to the ice sheet, post-depositional interactions, and a potential SPE association.

  7. Feasibility of reconstructing paleoatmospheric records of selected alkanes, methyl halides, and sulfur gases from Greenland ice cores

    E-Print Network [OSTI]

    Saltzman, Eric

    , and sulfur gases from Greenland ice cores M. Aydin,1 M. B. Williams,1 and E. S. Saltzman1 Received 7-lived atmospheric trace gases were measured in 25 ice core samples from Summit, Greenland. Samples were selected. The CH3Br results are consistent with previous observations of ``excess'' CH3Br in Greenland firn air

  8. Beryllium-10 in the Taylor Dome ice core: Applications to Antarctic glaciology and paleoclimatology

    SciTech Connect (OSTI)

    Steig, E.J.

    1996-12-31T23:59:59.000Z

    An ice core was drilled at Taylor dome, East Antarctica, reaching to bedrock at 554 meters. Oxygen-isotope measurements reveal climatic fluctuations through the last interglacial period. To facilitate comparison of the Taylor Dome paleoclimate record with geologic data and results from other deep ice cores, several glaciological issues need to be addressed. In particular, accumulation data are necessary as input for numerical ice-flow-models, for determining the flux of chemical constituents from measured concentrations, and for calculation of the offset in age between ice and trapped air in the core. The analysis of cosmogenic beryllium-10 provides a geochemical method for constraining the accumulation-rate history at Taylor Dome. High-resolution measurements were made in shallow firn cores and snow pits to determine the relationship among beryllium-10 concentrations, wet and dry deposition mechanisms, and snow-accumulation rates. Comparison between theoretical and measured variations in deposition over the last 75 years constrains the relationship between beryllium-10 deposition and global average production rates. The results indicate that variations in geomagnetically-modulated production-rate do not strongly influence beryllium-10 deposition at Taylor Dome. Although solar modulation of production rate is important for time scales of years to centuries, snow-accumulation rate is the dominant control on ice-core beryllium-10 concentrations for longer periods. Results show that the Taylor Dome core can be used to provide new constraints on regional climate over the last 130,000 years, complementing the terrestrial and marine geological record from the Dry Valley, Transantarctic Mountains and western Ross Sea.

  9. 9,400 years of cosmic radiation and solar activity from ice cores and tree rings

    E-Print Network [OSTI]

    Wehrli, Bernhard

    9,400 years of cosmic radiation and solar activity from ice cores and tree rings Friedhelm) Understanding the temporal variation of cosmic radiation and solar activity during the Holocene is essential the history of cosmic radiation and solar activity over many millennia. Although records from different

  10. Continuous Flow Analysis of Total Organic Carbon in Polar Ice Cores

    E-Print Network [OSTI]

    Stocker, Thomas

    Continuous Flow Analysis of Total Organic Carbon in Polar Ice Cores U R S F E D E R E R , * , , P, University of Bern, Bern, Switzerland, Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland, and British Antarctic Survey, Cambridge, United Kingdom Received May 6, 2008. Revised manuscript

  11. A 600-year annual 10 Be record from the NGRIP ice core, Greenland

    E-Print Network [OSTI]

    Wehrli, Bernhard

    A 600-year annual 10 Be record from the NGRIP ice core, Greenland A.-M. Berggren,1 J. Beer,2 G only one record (Dye-3, Greenland) providing annual resolution over several centuries. Here we report the NGRIP site in Greenland. NGRIP and Dye-3 10 Be exhibits similar long-term variability, although

  12. The Search for Supernova Signatures in an Ice Core A. L. Colea

    E-Print Network [OSTI]

    Howat, Ian M.

    , Michigan State University, East Lansing, MI 48824 b Physics and Astronomy Departments, The Ohio StateThe Search for Supernova Signatures in an Ice Core A. L. Colea , R. N. Boydb , M. E. Davisc , L. G University, Columbus, OH 43210 c Byrd Polar Research Center and Department of Geological Sciences, The Ohio

  13. THE SEARCH FOR SUPERNOVA GRAINS IN AN ICE CORE A. L. Cole1

    E-Print Network [OSTI]

    Laboratory, Michigan State University, East Lansing, MI 48824 R. N. Boyd Physics and Astronomy DepartmentsTHE SEARCH FOR SUPERNOVA GRAINS IN AN ICE CORE A. L. Cole1 National Superconducting Cyclotron, The Ohio State University, Columbus, OH 43210 M. E. Davis and L. G. Thompson The Byrd Polar Research Center

  14. Ice cores drilled from lake and ocean floors, continents, and ice sheets provide geoscientists with the most extensive and accurate picture of the earth!s

    E-Print Network [OSTI]

    Johnson, Andrew

    zer Ice cores drilled from lake and ocean floors, continents, and ice sheets provide geoscientists technologies and advanced equipment like high-resolution color line-scanners and multi-sensor data loggers displays run by a single computer all the way down to the new MacBook. Future development will incorporate

  15. Chronological refinement of an ice core record at Upper Fremont Glacier in south central North America

    SciTech Connect (OSTI)

    Schuster, Paul F. [U.S. Geological Survey, Water Resources Division, Boulder, Colorado (United States)] [U.S. Geological Survey, Water Resources Division, Boulder, Colorado (United States); White, David E. [Golden Software, Golden, Colorado (United States)] [Golden Software, Golden, Colorado (United States); Naftz, David L. [U.S. Geological Survey, Water Resources Division, Salt Lake City, Utah (United States)] [U.S. Geological Survey, Water Resources Division, Salt Lake City, Utah (United States); Cecil, L. DeWayne [U.S. Geological Survey, Water Resources Division, Idaho Falls, Idaho (United States)] [U.S. Geological Survey, Water Resources Division, Idaho Falls, Idaho (United States)

    2000-02-27T23:59:59.000Z

    The potential to use ice cores from alpine glaciers in the midlatitudes to reconstruct paleoclimatic records has not been widely recognized. Although excellent paleoclimatic records exist for the polar regions, paleoclimatic ice core records are not common from midlatitude locations. An ice core removed from the Upper Fremont Glacier in Wyoming provides evidence for abrupt climate change during the mid-1800s. Volcanic events (Krakatau and Tambora) identified from electrical conductivity measurements (ECM) and isotopic and chemical data from the Upper Fremont Glacier were reexamined to confirm and refine previous chronological estimates of the ice core. At a depth of 152 m the refined age-depth profile shows good agreement (1736{+-}10 A.D.) with the {sup 14}C age date (1729{+-}95 A.D.). The {delta}{sup 18}O profile of the Upper Fremont Glacier (UFG) ice core indicates a change in climate known as the Little Ice Age (LIA). However, the sampling interval for {delta}{sup 18}O is sufficiently large (20 cm) such that it is difficult to pinpoint the LIA termination on the basis of {delta}{sup 18}O data alone. Other research has shown that changes in the {delta}{sup 18}O variance are generally coincident with changes in ECM variance. The ECM data set contains over 125,000 data points at a resolution of 1 data point per millimeter of ice core. A 999-point running average of the ECM data set and results from f tests indicates that the variance of the ECM data decreases significantly at about 108 m. At this depth, the age-depth profile predicts an age of 1845 A.D. Results indicate the termination of the LIA was abrupt with a major climatic shift to warmer temperatures around 1845 A.D. and continuing to present day. Prediction limits (error bars) calculated for the profile ages are {+-}10 years (90% confidence level). Thus a conservative estimate for the time taken to complete the LIA climatic shift to present-day climate is about 10 years, suggesting the LIA termination in alpine regions of central North America may have occurred on a relatively short (decadal) timescale. (c) 2000 American Geophysical Union.

  16. Portable system for intermediate-depth ice-core drilling V. Zagorodnov, L.G. Thompson and E. Mosley-Thompson

    E-Print Network [OSTI]

    Howat, Ian M.

    Portable system for intermediate-depth ice-core drilling V. Zagorodnov, L.G. Thompson and E. Mosley-Thompson

  17. Paleoclimate and Glaciological Reconstruction in Central Asia Through The Collection and Analysis of Ice Cores and Instrumental Data From the Tien Shan

    SciTech Connect (OSTI)

    Cameron P. Wake; Vladimir Aizen; Karl Kreutz

    2001-05-30T23:59:59.000Z

    Paleoclimate and Glaciological Reconstruction in Central Asis Through The Collection And Analysis of Ice Cores and Instrumental Data From The Tien Shan

  18. Changes in black carbon deposition to Antarctica from two ice core records, A.D. 1850-2000

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    Climate and Environment CRC, University of Tasmania, Hobart, TAS, Australia, [5] Australian Nuclear. (2007). In the cold room, previously cut one meter ice core sticks of 3x3cm, are melted continuously on a heated melter head specifically designed to eliminate contamination from the atmosphere

  19. Mineral dust and elemental black carbon records from an Alpine ice core (Colle Gnifetti glacier) over the last millennium

    E-Print Network [OSTI]

    Gilli, Adrian

    ) over the last millennium Florian Thevenon,1,2 Flavio S. Anselmetti,3 Stefano M. Bernasconi,1 and Margit Gnifetti glacier (Monte Rosa, Swiss-Italian Alps, 45°550 N, 7°520 E, 4455 m above sea level) using chemical for ice core studies. In particular, the Colle Gnifetti glacier saddle, located in the Monte Rosa Massif

  20. Instruments and Methods Intermediate-depth ice coring of high-altitude and polar glaciers

    E-Print Network [OSTI]

    Howat, Ian M.

    an electromechanical drill (EMD) and an ethanol thermal electric drill (ETED). The EMD permitted an average ice in cold and temperate ice and in clean and particle-laden ice. The influence of the ethanol drilling fluid- arctica, 2000) and an ethanol thermal electric drill (ETED; Zagorodnov and others, 1998)). Ice thicknesses

  1. Soluble and insoluble lithium dust in the EPICA DomeC ice core--Implications for changes of the East Antarctic dust

    E-Print Network [OSTI]

    Fischer, Hubertus

    Soluble and insoluble lithium dust in the EPICA DomeC ice core--Implications for changes Editor: G.D. Price Available online 16 March 2007 Abstract Continental dust impurities in Antarctic ice with special emphasis on the lithium (Li) content of dust. We obtained two complementary Li-records using a new

  2. Paleo-Climate and Glaciological Reconstruction in Central Asia through the Collection and Analysis of Ice Cores and Instrumental Data from the Tien Shan

    SciTech Connect (OSTI)

    Vladimir Aizen; Donald Bren; Karl Kreutz; Cameron Wake

    2001-05-30T23:59:59.000Z

    While the majority of ice core investigations have been undertaken in the polar regions, a few ice cores recovered from carefully selected high altitude/mid-to-low latitude glaciers have also provided valuable records of climate variability in these regions. A regional array of high resolution, multi-parameter ice core records developed from temperate and tropical regions of the globe can be used to document regional climate and environmental change in the latitudes which are home to the vase majority of the Earth's human population. In addition, these records can be directly compared with ice core records available from the polar regions and can therefore expand our understanding of inter-hemispheric dynamics of past climate changes. The main objectives of our paleoclimate research in the Tien Shan mountains of middle Asia combine the development of detailed paleoenvironmental records via the physical and chemical analysis of ice cores with the analysis of modern meteorological and hydrological data. The first step in this research was the collection of ice cores from the accumulation zone of the Inylchek Glacier and the collection of meteorological data from a variety of stations throughout the Tien Shan. The research effort described in this report was part of a collaborative effort with the United State Geological Survey's (USGS) Global Environmental Research Program which began studying radionuclide deposition in mid-latitude glaciers in 1995.

  3. Spatial mapping of ices in the Oph-F core: A direct measurement of CO depletion and the formation of CO2

    E-Print Network [OSTI]

    K. M. Pontoppidan

    2006-05-22T23:59:59.000Z

    Aims: Ices in dense star-forming cores contain the bulk of volatile molecules apart from H2 and thus represent a large fraction of dark cloud chemistry budget.To directly constrain the freeze-out profile of CO, the formation route of CO2 and the carrier of the 6.8 micron band, the spatial distribution of the CO/CO2 ice system and the 6.8 micron band carrier are measured in a nearby dense core. Methods: VLT-ISAAC, ISOCAM-CVF and Spitzer-IRS archival mid-infrared (3-20 micron) spectroscopy of young stellar objects is used to construct a map of the abundances of CO and CO2 ices in the Oph-F star-forming core, probing core radii from 2 10^3 to 14 10^3 AU or densities from 5 10^4 to 5 10^5 cm^-3 with a resolution of ~ 3000 AU. Results: The line-of-sight averaged abundances relative to water ice of both CO and CO2 ices increase monotonously with decreasing distance to the core center. The map traces the shape of the CO abundance profile between freeze-out ratios of 5-60% and shows that the CO2 ice abundance increases by a factor of 2 as the CO freezes out. It is suggested that this indicates a formation route of CO2 on a CO ice surface to produce a CO2 component dilute in CO ice, in addition to a fraction of the CO2 formed at lower densities along with the water ice mantle. It is predicted that the CO2 bending mode band profile should reflect a high CO:CO2 number ratio in the densest parts of dark clouds. In contrast to CO and CO2, the abundance of the carrier of the 6.8 micron band remains relatively constant throughout the core. A simple freeze-out model of the CO abundance profile is used to estimate the binding energy of CO on a CO ice surface to 814+/-30 K.

  4. On 26th December 2006, at the ANDRILL McMurdo Ice Shelf (MIS) drill site, the final section of core was retrieved from the

    E-Print Network [OSTI]

    on the cores at the drill site. ANDRILL was one of the largest projects ever supported by Antarctica New: Technology Gives Scientists Plenty to Work On The ANDRILL drill site team Looking up the drilling mast #12;IIceSked On 26th December 2006, at the ANDRILL McMurdo Ice Shelf (MIS) drill site, the final section

  5. Determining neutrino oscillation parameters from atmospheric muon neutrino disappearance with three years of IceCube DeepCore data

    E-Print Network [OSTI]

    Aartsen, M G; Adams, J; Aguilar, J A; Ahlers, M; Ahrens, M; Altmann, D; Anderson, T; Arguelles, C; Arlen, T C; Auffenberg, J; Bai, X; Barwick, S W; Baum, V; Bay, R; Beatty, J J; Tjus, J Becker; Becker, K -H; BenZvi, S; Berghaus, P; Berley, D; Bernardini, E; Bernhard, A; Besson, D Z; Binder, G; Bindig, D; Bissok, M; Blaufuss, E; Blumenthal, J; Boersma, D J; Bohm, C; Bos, F; Bose, D; Böser, S; Botner, O; Brayeur, L; Bretz, H -P; Brown, A M; Brunner, J; Buzinsky, N; Casey, J; Casier, M; Cheung, E; Chirkin, D; Christov, A; Christy, B; Clark, K; Classen, L; Clevermann, F; Coenders, S; Cowen, D F; Silva, A H Cruz; Daughhetee, J; Davis, J C; Day, M; de André, J P A M; De Clercq, C; De Ridder, S; Desiati, P; de Vries, K D; de With, M; DeYoung, T; Díaz-Vélez, J C; Dunkman, M; Eagan, R; Eberhardt, B; Eichmann, B; Eisch, J; Euler, S; Evenson, P A; Fadiran, O; Fazely, A R; Fedynitch, A; Feintzeig, J; Felde, J; Feusels, T; Filimonov, K; Finley, C; Fischer-Wasels, T; Flis, S; Franckowiak, A; Frantzen, K; Fuchs, T; Gaisser, T K; Gaior, R; Gallagher, J; Gerhardt, L; Gier, D; Gladstone, L; Glüsenkamp, T; Goldschmidt, A; Golup, G; Gonzalez, J G; Goodman, J A; Góra, D; Grant, D; Gretskov, P; Groh, J C; Groß, A; Ha, C; Haack, C; Ismail, A Haj; Hallen, P; Hallgren, A; Halzen, F; Hanson, K; Hebecker, D; Heereman, D; Heinen, D; Helbing, K; Hellauer, R; Hellwig, D; Hickford, S; Hill, G C; Hoffman, K D; Hoffmann, R; Homeier, A; Hoshina, K; Huang, F; Huelsnitz, W; Hulth, P O; Hultqvist, K; Hussain, S; Ishihara, A; Jacobi, E; Jacobsen, J; Japaridze, G S; Jero, K; Jlelati, O; Jurkovic, M; Kaminsky, B; Kappes, A; Karg, T; Karle, A; Kauer, M; Keivani, A; Kelley, J L; Kheirandish, A; Kiryluk, J; Kläs, J; Klein, S R; Köhne, J -H; Kohnen, G; Kolanoski, H; Koob, A; Köpke, L; Kopper, C; Kopper, S; Koskinen, D J; Kowalski, M; Kriesten, A; Krings, K; Kroll, G; Kroll, M; Kunnen, J; Kurahashi, N; Kuwabara, T; Labare, M; Lanfranchi, J L; Larsen, D T; Larson, M J; Lesiak-Bzdak, M; Leuermann, M; Lünemann, J; Madsen, J; Maggi, G; Maruyama, R; Mase, K; Matis, H S; Maunu, R; McNally, F; Meagher, K; Medici, M; Meli, A; Meures, T; Miarecki, S; Middell, E; Middlemas, E; Milke, N; Miller, J; Mohrmann, L; Montaruli, T; Morse, R; Nahnhauer, R; Naumann, U; Niederhausen, H; Nowicki, S C; Nygren, D R; Obertacke, A; Odrowski, S; Olivas, A; Omairat, A; O'Murchadha, A; Palczewski, T; Paul, L; Penek, Ö; Pepper, J A; Heros, C Pérez de los; Pfendner, C; Pieloth, D; Pinat, E; Posselt, J; Price, P B; Przybylski, G T; Pütz, J; Quinnan, M; Rädel, L; Rameez, M; Rawlins, K; Redl, P; Rees, I; Reimann, R; Relich, M; Resconi, E; Rhode, W; Richman, M; Riedel, B; Robertson, S; Rodrigues, J P; Rongen, M; Rott, C; Ruhe, T; Ruzybayev, B; Ryckbosch, D; Saba, S M; Sander, H -G; Sandroos, J; Santander, M; Sarkar, S; Schatto, K; Scheriau, F; Schmidt, T; Schmitz, M; Schoenen, S; Schöneberg, S; Schönwald, A; Schukraft, A; Schulte, L; Schulz, O; Seckel, D; Sestayo, Y; Seunarine, S; Shanidze, R; Smith, M W E; Soldin, D; Spiczak, G M; Spiering, C; Stamatikos, M; Stanev, T; Stanisha, N A; Stasik, A; Stezelberger, T; Stokstad, R G; Stößl, A; Strahler, E A; Ström, R; Strotjohann, N L; Sullivan, G W; Taavola, H; Taboada, I; Tamburro, A; Tepe, A; Ter-Antonyan, S; Terliuk, A; Teši?, G; Tilav, S; Toale, P A; Tobin, M N; Tosi, D; Tselengidou, M; Unger, E; Usner, M; Vallecorsa, S; van Eijndhoven, N; Vandenbroucke, J; van Santen, J; Vehring, M; Voge, M; Vraeghe, M; Walck, C; Wallraff, M; Weaver, Ch; Wellons, M; Wendt, C; Westerhoff, S; Whelan, B J; Whitehorn, N; Wichary, C; Wiebe, K; Wiebusch, C H; Williams, D R; Wissing, H; Wolf, M; Wood, T R; Woschnagg, K; Xu, D L; Xu, X W; Yanez, J P; Yodh, G; Yoshida, S; Zarzhitsky, P; Ziemann, J; Zoll, M

    2014-01-01T23:59:59.000Z

    We present a measurement of neutrino oscillations via atmospheric muon neutrino disappearance with three years of data of the completed IceCube neutrino detector. DeepCore, a region of denser instrumentation, enables the detection and reconstruction of atmospheric muon neutrinos between 10\\,GeV and 100\\,GeV, where a strong disappearance signal is expected. The detector volume surrounding DeepCore is used as a veto region to suppress the atmospheric muon background. Neutrino events are selected where the detected Cherenkov photons of the secondary particles minimally scatter, and the neutrino energy and arrival direction are reconstructed. Both variables are used to obtain the neutrino oscillation parameters from the data, with the best fit given by $\\Delta m^2_{32}=2.72^{+0.19}_{-0.20}\\times 10^{-3}\\,\\mathrm{eV}^2$ and $\\sin^2\\theta_{23} = 0.53^{+0.09}_{-0.12}$ (normal mass hierarchy assumed). The results are compatible and comparable in precision to those of dedicated oscillation experiments.

  6. Determining neutrino oscillation parameters from atmospheric muon neutrino disappearance with three years of IceCube DeepCore data

    E-Print Network [OSTI]

    IceCube Collaboration; M. G. Aartsen; M. Ackermann; J. Adams; J. A. Aguilar; M. Ahlers; M. Ahrens; D. Altmann; T. Anderson; C. Arguelles; T. C. Arlen; J. Auffenberg; X. Bai; S. W. Barwick; V. Baum; R. Bay; J. J. Beatty; J. Becker Tjus; K. -H. Becker; S. BenZvi; P. Berghaus; D. Berley; E. Bernardini; A. Bernhard; D. Z. Besson; G. Binder; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; F. Bos; D. Bose; S. Böser; O. Botner; L. Brayeur; H. -P. Bretz; A. M. Brown; J. Brunner; N. Buzinsky; J. Casey; M. Casier; E. Cheung; D. Chirkin; A. Christov; B. Christy; K. Clark; L. Classen; F. Clevermann; S. Coenders; D. F. Cowen; A. H. Cruz Silva; J. Daughhetee; J. C. Davis; M. Day; J. P. A. M. de André; C. De Clercq; S. De Ridder; P. Desiati; K. D. de Vries; M. de With; T. DeYoung; J. C. Díaz-Vélez; M. Dunkman; R. Eagan; B. Eberhardt; B. Eichmann; J. Eisch; S. Euler; P. A. Evenson; O. Fadiran; A. R. Fazely; A. Fedynitch; J. Feintzeig; J. Felde; T. Feusels; K. Filimonov; C. Finley; T. Fischer-Wasels; S. Flis; A. Franckowiak; K. Frantzen; T. Fuchs; T. K. Gaisser; R. Gaior; J. Gallagher; L. Gerhardt; D. Gier; L. Gladstone; T. Glüsenkamp; A. Goldschmidt; G. Golup; J. G. Gonzalez; J. A. Goodman; D. Góra; D. Grant; P. Gretskov; J. C. Groh; A. Groß; C. Ha; C. Haack; A. Haj Ismail; P. Hallen; A. Hallgren; F. Halzen; K. Hanson; D. Hebecker; D. Heereman; D. Heinen; K. Helbing; R. Hellauer; D. Hellwig; S. Hickford; G. C. Hill; K. D. Hoffman; R. Hoffmann; A. Homeier; K. Hoshina; F. Huang; W. Huelsnitz; P. O. Hulth; K. Hultqvist; S. Hussain; A. Ishihara; E. Jacobi; J. Jacobsen; G. S. Japaridze; K. Jero; O. Jlelati; M. Jurkovic; B. Kaminsky; A. Kappes; T. Karg; A. Karle; M. Kauer; A. Keivani; J. L. Kelley; A. Kheirandish; J. Kiryluk; J. Kläs; S. R. Klein; J. -H. Köhne; G. Kohnen; H. Kolanoski; A. Koob; L. Köpke; C. Kopper; S. Kopper; D. J. Koskinen; M. Kowalski; A. Kriesten; K. Krings; G. Kroll; M. Kroll; J. Kunnen; N. Kurahashi; T. Kuwabara; M. Labare; J. L. Lanfranchi; D. T. Larsen; M. J. Larson; M. Lesiak-Bzdak; M. Leuermann; J. Lünemann; J. Madsen; G. Maggi; R. Maruyama; K. Mase; H. S. Matis; R. Maunu; F. McNally; K. Meagher; M. Medici; A. Meli; T. Meures; S. Miarecki; E. Middell; E. Middlemas; N. Milke; J. Miller; L. Mohrmann; T. Montaruli; R. Morse; R. Nahnhauer; U. Naumann; H. Niederhausen; S. C. Nowicki; D. R. Nygren; A. Obertacke; S. Odrowski; A. Olivas; A. Omairat; A. O'Murchadha; T. Palczewski; L. Paul; Ö. Penek; J. A. Pepper; C. Pérez de los Heros; C. Pfendner; D. Pieloth; E. Pinat; J. Posselt; P. B. Price; G. T. Przybylski; J. Pütz; M. Quinnan; L. Rädel; M. Rameez; K. Rawlins; P. Redl; I. Rees; R. Reimann; M. Relich; E. Resconi; W. Rhode; M. Richman; B. Riedel; S. Robertson; J. P. Rodrigues; M. Rongen; C. Rott; T. Ruhe; B. Ruzybayev; D. Ryckbosch; S. M. Saba; H. -G. Sander; J. Sandroos; M. Santander; S. Sarkar; K. Schatto; F. Scheriau; T. Schmidt; M. Schmitz; S. Schoenen; S. Schöneberg; A. Schönwald; A. Schukraft; L. Schulte; O. Schulz; D. Seckel; Y. Sestayo; S. Seunarine; R. Shanidze; M. W. E. Smith; D. Soldin; G. M. Spiczak; C. Spiering; M. Stamatikos; T. Stanev; N. A. Stanisha; A. Stasik; T. Stezelberger; R. G. Stokstad; A. Stößl; E. A. Strahler; R. Ström; N. L. Strotjohann; G. W. Sullivan; H. Taavola; I. Taboada; A. Tamburro; A. Tepe; S. Ter-Antonyan; A. Terliuk; G. Teši?; S. Tilav; P. A. Toale; M. N. Tobin; D. Tosi; M. Tselengidou; E. Unger; M. Usner; S. Vallecorsa; N. van Eijndhoven; J. Vandenbroucke; J. van Santen; M. Vehring; M. Voge; M. Vraeghe; C. Walck; M. Wallraff; Ch. Weaver; M. Wellons; C. Wendt; S. Westerhoff; B. J. Whelan; N. Whitehorn; C. Wichary; K. Wiebe; C. H. Wiebusch; D. R. Williams; H. Wissing; M. Wolf; T. R. Wood; K. Woschnagg; D. L. Xu; X. W. Xu; J. P. Yanez; G. Yodh; S. Yoshida; P. Zarzhitsky; J. Ziemann; M. Zoll

    2014-10-27T23:59:59.000Z

    We present a measurement of neutrino oscillations via atmospheric muon neutrino disappearance with three years of data of the completed IceCube neutrino detector. DeepCore, a region of denser instrumentation, enables the detection and reconstruction of atmospheric muon neutrinos between 10\\,GeV and 100\\,GeV, where a strong disappearance signal is expected. The detector volume surrounding DeepCore is used as a veto region to suppress the atmospheric muon background. Neutrino events are selected where the detected Cherenkov photons of the secondary particles minimally scatter, and the neutrino energy and arrival direction are reconstructed. Both variables are used to obtain the neutrino oscillation parameters from the data, with the best fit given by $\\Delta m^2_{32}=2.72^{+0.19}_{-0.20}\\times 10^{-3}\\,\\mathrm{eV}^2$ and $\\sin^2\\theta_{23} = 0.53^{+0.09}_{-0.12}$ (normal mass hierarchy assumed). The results are compatible and comparable in precision to those of dedicated oscillation experiments.

  7. On the effective implementation of a boundary element code on graphics processing units unsing an out-of-core LU algorithm

    SciTech Connect (OSTI)

    D'Azevedo, Ed F [ORNL; Nintcheu Fata, Sylvain [ORNL

    2012-01-01T23:59:59.000Z

    A collocation boundary element code for solving the three-dimensional Laplace equation, publicly available from \\url{http://www.intetec.org}, has been adapted to run on an Nvidia Tesla general purpose graphics processing unit (GPU). Global matrix assembly and LU factorization of the resulting dense matrix were performed on the GPU. Out-of-core techniques were used to solve problems larger than available GPU memory. The code achieved over eight times speedup in matrix assembly and about 56~Gflops/sec in the LU factorization using only 512~Mbytes of GPU memory. Details of the GPU implementation and comparisons with the standard sequential algorithm are included to illustrate the performance of the GPU code.

  8. Trellis graphics 1 Trellis graphics

    E-Print Network [OSTI]

    Irwin, Mark E.

    Trellis graphics 1 Trellis graphics Extremely useful approach for graphical exploratory data of a surface on a rectangular grid #12;Trellis graphics 2 wireframe: perspective plot of a surface evaluated graphics functions are contained in the library, trellis. This library should be loaded automatically when

  9. Feasibility of reconstructing paleoatmospheric records of selected alkanes, methyl halides, and sulfur gases from Greenland ice cores

    E-Print Network [OSTI]

    Aydin, M.; Williams, M. B; Saltzman, E. S

    2007-01-01T23:59:59.000Z

    drilling fluid, which probably penetrated the ice along fractures that later healed, appear to contaminate C 3 H 8 as well

  10. 159.235 Graphics 1 159.235 Graphics & Graphical

    E-Print Network [OSTI]

    Hawick, Ken

    159.235 Graphics 1 159.235 Graphics & Graphical Programming Lecture 1 - GRAPHICS Overview #12;159.235 Graphics 2 What's this course all about? Not! Paint and Imaging packages (Adobe Photoshop) Cad packages (Digimation) Graphics APIs (OpenGL) Graphics Modelling and Languages (RenderMan) #12;159.235 Graphics 3 What

  11. SPATIAL AND TEMPORAL VARIABILITY OF NET ACCUMULATION FROM SHALLOW CORES FROM

    E-Print Network [OSTI]

    Moore, John

    SPATIAL AND TEMPORAL VARIABILITY OF NET ACCUMULATION FROM SHALLOW CORES FROM VESTFONNA ICE CAP variability of net accumulation from shallow cores from Vestfonna ice cap (Nordaustlandet, Svalbard. We analyse ice cores from Vestfonna ice cap (Nordaustlandet, Svalbard). Oxygen isoto- pic

  12. 159.235 Graphics 1 159.235 Graphics & Graphical

    E-Print Network [OSTI]

    Hawick, Ken

    159.235 Graphics 1 159.235 Graphics & Graphical Programming Lecture 2 - Graphics Fundamentals #12;159.235 Graphics 2 Fundamentals Outline · Historical perspective · Model of a Computer - Memory & Graphics · Devices · Raster Model & Bitmaps · Coordinates · Drawing Spaces · Colours · Graphics Libraries #12

  13. graphics.h

    E-Print Network [OSTI]

    graphics.h Definitions for Graphics Package. ... enum graphics_modes { /* graphics modes for each driver */ CGAC0 = 0, /* 320x200 palette 0; 1 page */ CGAC1 ...

  14. 159.235 Graphics 1 159.235 Graphics & Graphical

    E-Print Network [OSTI]

    Hawick, Ken

    159.235 Graphics 1 159.235 Graphics & Graphical Programming Lecture 32 - Illumination Part 2 - Global Models #12;159.235 Graphics 2 Global Illumination · Extends the Local Illumination Model;159.235 Graphics 3 Wireframe View of a Test Scene Orthographic view from above #12;159.235 Graphics 4 Test Scene

  15. Direct chemical analysis of frozen ice cores by UV-laser ablation ICPMS Wolfgang Muller,*a

    E-Print Network [OSTI]

    Royal Holloway, University of London

    mm long ice (b, c); its `tongue-like' extension through the cell door has a Peltier element clamped DOI: 10.1039/c1ja10242g Cryo-cell UV-LA-ICPMS is a new technique for direct chemical analysis analysis at cell UV-LA-ICPMS setup used

  16. Influence of large-scale teleconnection patterns on methane sulfonate ice core records in Dronning Maud Land

    E-Print Network [OSTI]

    Fischer, Hubertus

    temperature difference. This salt-based storage of heat at depth is analogous to Convectively Available). First widely recognized as more than climatic ``noise'' by the drilling of two deep Greenland summit ice coherent pattern of climate in- stability. Broecker first proposed that a ``salt oscillator

  17. 159.235 Graphics 1 159.235 Graphics & Graphical

    E-Print Network [OSTI]

    Hawick, Ken

    159.235 Graphics 1 159.235 Graphics & Graphical Programming Lecture 24 - Projections - Part 1 #12;159.235 Graphics 2 Projections - Outline · 3D Viewing · Coordinate System & Transform Process · Generalised Projections · Taxonomy of Projections · Perspective Projections #12;159.235 Graphics 3 3D Viewing · Inherently

  18. 159.235 Graphics 1 159.235 Graphics & Graphical

    E-Print Network [OSTI]

    Hawick, Ken

    159.235 Graphics 1 159.235 Graphics & Graphical Programming Lecture 12 - Aliasing, Dithering & Halftoning #12;159.235 Graphics 2 Dithering and Halftoning Trade spatial for intensity resolution an area - Spatial Integration #12;159.235 Graphics 3 Thresholding. Original image. Simple threshold.n = 0

  19. 159.235 Graphics 1 159.235 Graphics & Graphical

    E-Print Network [OSTI]

    Hawick, Ken

    159.235 Graphics 1 159.235 Graphics & Graphical Programming Lecture 33 - Illumination Part 3 - View Independent Rendering #12;159.235 Graphics 2 We'll look at two methods · Bidirectional ray tracing. · Both do not require the ambient intensity hack. #12;159.235 Graphics 3 1. Bidirectional Ray Tracing L

  20. 159.235 Graphics 1 159.235 Graphics & Graphical

    E-Print Network [OSTI]

    Hawick, Ken

    - Part 2 #12;159.235 Graphics 2 Radiometry : Radiance Radiometry is the science of light energy159.235 Graphics 1 159.235 Graphics & Graphical Programming Lecture 30 - Colour, Physics and Light to radiance srm W wxL . ),( 2 #12;159.235 Graphics 3 Radiometry: Irradiance and Radiosity Definition

  1. Formation and character of an ancient 19-m ice cover and underlying trapped brine in an ``ice-sealed'' east

    E-Print Network [OSTI]

    Priscu, John C.

    Formation and character of an ancient 19-m ice cover and underlying trapped brine in an ``ice bed year-round. New ice-core analysis and tempera- ture data show that beneath 19 m of ice is a water°C. The ice cover thickens at both its base and surface, sealing concentrated brine beneath. The ice

  2. A 12,000 year record of explosive volcanism in the Siple Dome Ice Core, West Antarctica

    E-Print Network [OSTI]

    Dunbar, Nelia W.

    of tephra found in the SDMA core: Balenny Island, Pleiades, Mount Berlin, Mount Takahe, and Mount Melbourne]. Continuous long-term records of SO4 2À concentrations [Mayewski et al., 1986, 1997; Legrand et al., 1988 acidity records from electrical conductivity (ECM) [Hammer et al., 1980; Hammer, 1983; Taylor et al., 1993

  3. A study of carbon-14 of paleoatmospheric methane for the last glacial termination from ancient glacial ice

    E-Print Network [OSTI]

    Petrenko, Vasilii Victorovich

    2008-01-01T23:59:59.000Z

    for the last glacial termination." xii VITA Education Ph.D.the Last Glacial Termination: a horizontal ice core.the Last Glacial Termination: a horizontal ice core.

  4. Ice sheets

    E-Print Network [OSTI]

    Bentley, Charles G.; Thomas, Robert H.; Velicogna, Isabella

    2007-01-01T23:59:59.000Z

    is eroding West Antarctic Ice Sheet. Geophysical Researchand Yungel, J. (2000). Greenland Ice Sheet: High-Elevation2004). The west Antarctic ice sheet and long term climate

  5. Incorporation of particulates into accreted ice above subglacial Vostok lake, Antarctica 

    E-Print Network [OSTI]

    Siegert, M. J.; Royston-Bishop, G.; Priscu, J. C.; Tranter, M.; Christner, B.; Lee, V.

    2005-01-01T23:59:59.000Z

    The nature of microscopic particulates in meteoric and accreted ice from the Vostok (Antarctica) ice core is assessed in conjunction with existing ice-core data to investigate the mechanism by which particulates are ...

  6. Temporal variations of mineral dust, biogenic tracers, and anthropogenic species during the past two centuries from Belukha ice core, Siberian Altai - article no. D05309

    SciTech Connect (OSTI)

    Olivier, S.; Blaser, C.; Brutsch, S.; Frolova, N.; Gaggeler, H.W.; Henderson, K.A.; Palmer, A.S.; Papina, T.; Schwikowski, M. [Paul Scherrer Institute, Villigen (Switzerland)

    2006-03-07T23:59:59.000Z

    In July 2001, a 140 m long ice core was recovered from the Belukha glacier (49 degrees 48'26''N, 86 degrees 34'43''E, 4062 m a.s.l.) in the Siberian Altai. The ion chemistry of the upper 86 m, covering the last two centuries, is characterized by biogenic emissions (ammonium and formate), aeolian dust (calcium, magnesium, chloride, and sodium) and anthropogenic species (sulfate, nitrate, and ammonium). Particularly high ammonium and formate concentrations indicate pronounced emissions from Siberian forests. The inferred fire frequency does not show a long-term trend but distinct periods of enhanced activity. Sulfate has the highest industrial to preindustrial ratio and an anthropogenic contribution of more than 80%. Variations in this record reflect sulfur dioxide emissions in Siberia and Kazakhstan. Sulfate concentrations remained low until 1950, then sharply increased and peaked in the 1970s. The decrease in the 1980s is attributed to the economic, political, and social crises and to the replacement of coal with gas. Rising nitrate concentrations since 1960 reflect traffic growth and enhanced fertilizer application. Increasing ammonium concentrations since the 1950s are attributable to population inflow in southern Siberia with the associated enhancement of agricultural activity. A nitrate peak of short duration in 1908 is thought to be the atmospheric signature from the Tunguska event on 30 June 1908.

  7. 159.235 Graphics 1 159.235 Graphics & Graphical

    E-Print Network [OSTI]

    Hawick, Ken

    ratio, = FAR * vres/hres. #12;159.235 Graphics 7 Refresh Rates and Bandwidth Critical flicker fusion: Torborg et al 1996. #12;159.235 Graphics 9 Raster Graphics System Architecture Image © P Hanrahan #12 is conical, or more optimally gaussian. · CRT pixels overlap. A Pixel is NOT just a little square. 2i #12

  8. 159.235 Graphics 1 159.235 Graphics & Graphical

    E-Print Network [OSTI]

    Hawick, Ken

    Spectrum #12;159.235 Graphics 4 Clear Sky © Pat Hanrahan. UV Daylight Vision #12;159.235 Graphics 5 (colour or black/white) when compared to a standard candle · Termed luminance Uniform perceptual scale & Blue primaries. #12;159.235 Graphics 10 Luminance Compare colour source to a grey source · Luminance Y

  9. COMPUTER-ASSISTED INFORMATION GRAPHICS FROM THE GRAPHIC DESIGN PERSPECTIVE

    E-Print Network [OSTI]

    Marcus, A.

    2013-01-01T23:59:59.000Z

    slide shows, and computer graphics. Mr. Yukio Ota, Researchgr ic signer of Meta-Graphics, Berkeley. Mr. Jerry Kuyper,Assisted Information Graphics From The Graphic Design

  10. Amundsen Sea sea-ice variability, atmospheric circulation, and spatial variations in snow isotopic composition from new West Antarctic firn cores

    E-Print Network [OSTI]

    Criscitiello, Alison Sara

    2014-01-01T23:59:59.000Z

    Recent work has documented dramatic changes in the West Antarctic Ice Sheet (WAIS) over the past 30 years (e.g., mass loss, glacier acceleration, surface warming) due largely to the influence of the marine environment. ...

  11. 159.235 Graphics & Graphical Programming -Review Lecture

    E-Print Network [OSTI]

    Hawick, Ken

    159.235 Graphics 1 159.235 Graphics & Graphical Programming - Review Lecture #12;159.235 Graphics 2 Lecture 0/1 - The Outline & Overview · We have not exactly stuck rigidly to this! · Java vs other Graphical Systems · Aim at covering graphics algorithms #12;159.235 Graphics 3 Lecture 2

  12. Microstructure through an ice sheet Tobias Binder1, a

    E-Print Network [OSTI]

    Garbe, Christoph S.

    Microstructure through an ice sheet Tobias Binder1, a , Ilka Weikusat2, b , Johannes Freitag2, c.Garbe@iwr.uni-heidelberg.de, e Dietmar.Wagenbach@iup.uni-heidelberg.de, f Sepp.Kipfstuhl@awi.de Keywords: Ice, microstructure characterization, grain boundary curvature, image processing Abstract. Ice cores through an ice sheet can

  13. 159.235 Graphics & Graphical Programming

    E-Print Network [OSTI]

    Hawick, Ken

    for this paper, however you may find the following useful: · Java 2D Graphics, Johnathan Knudsen, Pub. O'Reilly in C, James Foley, Andries van dam, Steven Feiner and John Hughes, Pub. Addison-Wesley, 1997, ISBN 0201 along the way · The Java Development Kit, the Graphics 2D and 3D packages are all free and available

  14. Isotopic tracing (Sr, Nd, U and Hf) of continental and marine aerosols in an 18th century section of the Dye-3 ice core (Greenland)

    E-Print Network [OSTI]

    Stocker, Thomas

    sea salts strontium neodymium hafnium uranium Determining the sources and pathways of atmospheric and 234 U/238 U activity ratios close to seawater. Nd variations are significant (N6 units) and are decoupled from dust composition, indicating that the Nd composition of seawater is preserved in the ice

  15. Evolution of Graphics Pipelines 1 Understanding the Graphics Heritage

    E-Print Network [OSTI]

    Verschelde, Jan

    Evolution of Graphics Pipelines 1 Understanding the Graphics Heritage the era of fixed-function graphics pipelines the stages to render triangles 2 Programmable Real-Time Graphics programmable vertex and fragment processors an example of a programmable pipeline unified graphics and computing processors GPU

  16. CSC6870 Computer Graphics II CSC6870 Computer Graphics II

    E-Print Network [OSTI]

    Hua, Jing

    CSC6870 Computer Graphics II Surfaces CSC6870 Computer Graphics II Surfaces · Plane · Quadratic. CSC6870 Computer Graphics II Plane and Intersection CSC6870 Computer Graphics II Plane Equations · General plane equation ax+by+cz+d=0 · Normal of the plane n=[a, b, c] CSC6870 Computer Graphics II

  17. A tentative reconstruction of the last interglacial and glacial inception in Greenland based on new gas measurements in the Greenland Ice

    E-Print Network [OSTI]

    Chappellaz, Jérôme

    A tentative reconstruction of the last interglacial and glacial inception in Greenland based on new gas measurements in the Greenland Ice Core Project (GRIP) ice core Amaelle Landais,1 Je September 2003. [1] The disturbed stratigraphy of the ice in the lowest 10% of the Greenland GRIP ice core

  18. JOURNAL FOR GEOMETRY AND GRAPHICS

    E-Print Network [OSTI]

    Stachel, Hellmuth

    JOURNAL FOR GEOMETRY AND GRAPHICS . . . the journal for graphics educators AIMS AND SCOPE methodology in the field of graphics and graphics-related geometry by the dissemination of new results. JGG is the journal of the International Society for Geometry and Graphics FREQUENCY One volume per year, consisting

  19. Computer Graphics II CSC6870 Computer Graphics II CSC6870 Computer Graphics II

    E-Print Network [OSTI]

    Hua, Jing

    1 Computer Graphics II CSC6870 Computer Graphics II CSC6870 Computer Graphics II Course Information://www.cs.wayne.edu/~jinghua/6870/csc6870.htm) CSC6870 Computer Graphics II Textbooks · REQUIRED TEXTBOOK: Interactive Computer Graphics: A Top-Down Approach with Shader-Based OpenGL (6th Edition) Edward Angel, Dave Shreiner ISBN-10

  20. Programmable Graphics Pipelines Anjul Patney

    E-Print Network [OSTI]

    Yoo, S. J. Ben

    Programmable Graphics Pipelines By Anjul Patney B.Tech. (Indian Institute of Technology Delhi) 2007 as Abstractions for Computer Graphics 5 2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Modern Graphics Pipelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2

  1. Interstellar Ices

    E-Print Network [OSTI]

    Boogert, A C A

    2003-01-01T23:59:59.000Z

    Currently ~36 different absorption bands have been detected in the infrared spectra of cold, dense interstellar and circumstellar environments. These are attributed to the vibrational transitions of ~17 different molecules frozen on dust grains. We review identification issues and summarize the techniques required to extract information on the physical and chemical evolution of these ices. Both laboratory simulations and line of sight studies are essential. Examples are given for ice bands observed toward high mass protostars, fields stars and recent work on ices in disks surrounding low mass protostars. A number of clear trends have emerged in recent years. One prominent ice component consists of an intimate mixture between H2O, CH3OH and CO2 molecules. Apparently a stable balance exists between low temperature hydrogenation and oxidation reactions on grain surfaces. In contrast, an equally prominent ice component, consisting almost entirely of CO, must have accreted directly from the gas phase. Thermal proc...

  2. The Integrated Computer Engineering Design (ICED) Curriculum Augustus K. Uht

    E-Print Network [OSTI]

    Uht, Augustus K.

    The Integrated Computer Engineering Design (ICED) Curriculum Augustus K. Uht Department computer engineering curriculum, ICED, is being introduced at the University of Rhode Island. The main. This paper gives the rationale of ICED in depth, and describes the core courses, their activities and use

  3. Introduction to LBL graphics

    SciTech Connect (OSTI)

    Not Available

    1984-08-01T23:59:59.000Z

    The Computing Services Department supports a number of graphics software packages on the VAX machines, primarily on the IGM VAX. These packages will drive a large variety of different graphical devices, terminals (including various Tektronix terminals, the AED 512 color raster terminal, the IMLAC Series II vector list processor terminal and others), various styles of plotters and the DICOMED D48 film recorder. We are going to present to you the following graphic software packages: Tell-A-Graf, Cuechart, Tell-A-Plan, Data Connection, DI-3000, Contouring, Grafmaker (including Grafeasy), Grafmaster, Movie.BYU, Grafpac, IDDS, UGS/HPLOT/HBOOK, and SDL/SGL.

  4. Archimedean Ice

    E-Print Network [OSTI]

    Kari Eloranta

    2009-09-22T23:59:59.000Z

    The striking boundary dependency (the Arctic Circle phenomenon) exhibited in the ice model on the square lattice extends to other planar set-ups. We present these findings for the triangular and the Kagome lattices. Critical connectivity results guarantee that ice configurations can be generated using the simplest and most efficient local actions. Height functions are utilized throughout the analysis. At the end there is a surprise in store: on the remaining Archimedean lattice for which the ice model can be defined, the 3.4.6.4. lattice, the long range behavior is completely different from the other cases.

  5. Graphics insertion in TEX

    E-Print Network [OSTI]

    Kattawar, Gregory Williford

    1989-01-01T23:59:59.000Z

    GRAPHICS INSERTION IN ~ A Thesis by GREGORY WILLIFORD KATTAWAR Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1989 Major Subject...: Computer Science GRAPHICS INSERTION IN TgX A Thesis by GREGORY WILLIFORD KATTAWAR Approved as to style and content by: S. Bart Childs (Chair of Committee) Norman W. Naugle (Member) Udo W. ooch (Member) Richard A. Volz (Head of Department...

  6. Design and Execution of Model Experiments to Validate Numerical Modelling of 2D Ship Operations in Pack Ice

    E-Print Network [OSTI]

    Bruneau, Steve

    in Pack Ice Roelof C. Dragt Offshore Engineering Faculty of Mechanical, Maritime and Material Engineering of experiments to validate a Graphics Processing Unit based numerical modelling of ship operations in 2D pack ice interaction, 2D Model Experiments, Image Processing. I. INTRODUCTION A ship travelling through pack ice

  7. Scripting graphics with graphics : icons as a visual editing tool

    E-Print Network [OSTI]

    Shamonsky, Dorothy J

    1984-01-01T23:59:59.000Z

    This thesis describes a system for scripting and editing graphic procedures with graphic representations or "icons." The icons are small bitmap images that carry with them information about spatial placement, list placement, ...

  8. STATISTICAL COMPUTING AND GRAPHICS

    E-Print Network [OSTI]

    Masci, Frank

    Marron for a helpful comment. @ 1997 American Statistical Association bin width should be chosen soSTATISTICAL COMPUTING AND GRAPHICS Data-Based Choice of Histogram Bin Width The most important of the "optimal" bin width. Default bin widths in most common statistical packages are, at least for large samples

  9. Computer graphics and story telling

    E-Print Network [OSTI]

    Griffith, Sarah

    1984-01-01T23:59:59.000Z

    The use of computer graphics designed for film and television is discussed from an aesthetic and systems point of view. Graphics are used for information clarification in news and documentary work, digital video effects ...

  10. A high glacier opens a view of the ice age tropics

    SciTech Connect (OSTI)

    Mlot, C.

    1995-07-07T23:59:59.000Z

    This article discusses new information about the ice age tropics as cores from a mountain glacier in the Peruvian Andes are analysed. Chemical markers in the ice of the two cores (160 and 166 meters long), covering 20,000 years, are starting to provide detailed support for understanding the ice age in the tropics. they show that climate in the tropics experience sharp oscillations at the end of the ice ages as it did in more northerly regions. Information about El Ninos and how the tropics respond to global climate changes is forthcoming. Comments on the actual expedition to obtain the ice cores are included.

  11. Iced Coffee Iced Yerba Mate "Tea"

    E-Print Network [OSTI]

    Iced Coffee Iced Yerba Mate "Tea" Iced Yerba Mate Latte Iced Chai Tea Latte Original, Green Tea Canned Soda Xing Tea Bottled Water Arizona Teas Energy Drinks Red Bull, SF Red Bull & Bing Jones Sodas $0 Cafe au Lait Hot Tea Yerba Mate "Tea" Yerba Mate Latte Chai Tea Latte - Original, Green Tea, or Sugar

  12. High-Resolution Monitoring of Internal Layers Over the Greenland Ice Sheet P. Kanagaratnam, S.P. Gogineni

    E-Print Network [OSTI]

    Kansas, University of

    High-Resolution Monitoring of Internal Layers Over the Greenland Ice Sheet P. Kanagaratnam, S ice plays an important role in the rise of the Earth's sea level. A key variable in assessing the mass balance of an ice sheet is accumulation rate, which is currently determined from ice cores and pits

  13. The Application of Projected Conjugate Gradient Solvers on Graphical Processing Units

    E-Print Network [OSTI]

    Renaut, Rosemary

    nearby slices. Keywords High Performance Computing, GPU, Krylov Subspace Meth- ods, Lanczos disciplines on the use of many-core based high performance computing (HPC) architectures. The NVIDIA graphical

  14. NCAR Graphics Libraries at NERSC

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

    your C program. Setting the Environment To access the current version of NCAR Graphics, load the ncar module by typing: % module load ncar This makes the libraries, executables,...

  15. Atmospheric neutrino oscillations and tau neutrinos in ice

    E-Print Network [OSTI]

    Gerardo Giordano; Olga Mena; Irina Mocioiu

    2010-04-20T23:59:59.000Z

    The main goal of the IceCube Deep Core Array is to search for neutrinos of astrophysical origins. Atmospheric neutrinos are commonly considered as a background for these searches. We show here that cascade measurements in the Ice Cube Deep Core Array can provide strong evidence for tau neutrino appearance in atmospheric neutrino oscillations. A careful study of these tau neutrinos is crucial, since they constitute an irreducible background for astrophysical neutrino detection.

  16. CSC6870 Computer Graphics II Geometric Modeling

    E-Print Network [OSTI]

    Hua, Jing

    CSC6870 Computer Graphics II Geometric Modeling CSC6870 Computer Graphics II Overview 3D Shape, subdivision surfaces, implicit surfaces, particles. · Solids CSC6870 Computer Graphics II Basic Shapes CSC6870 Computer Graphics II Fundamental Shapes CSC6870 Computer Graphics II Fundamental Shapes CSC6870 Computer

  17. Computer Graphics Group Leif KobbeltAACHEN

    E-Print Network [OSTI]

    Kobbelt, Leif

    Computer Graphics Group Leif KobbeltAACHEN Computer Graphics Leif Kobbelt Computer Graphics Group Leif KobbeltAACHEN Public Perception of CG · Games · Movies Computer Graphics Group Leif KobbeltAACHEN Computer Graphics Research · fundamental algorithms & data structures - continuous & discrete mathematics

  18. INTERACTIVE COMPUTER GRAPHICS DISPLAYS FOR HIERARCHICAL DATA STRUCTURES

    E-Print Network [OSTI]

    Cahn, D.F.

    2010-01-01T23:59:59.000Z

    INTERACTIVE COMPUTER GRAPHICS DISPLAYS FOR HIERARCHICAL DATAINTERACTIVE COMPUTER GRAPHICS DISPLAYS FOR HIERARCHICAL DATAtem. INTERACTIVE COMPUTER GRAPHICS DISPLAYS FOR HIERARCHICAL

  19. The whole world had a case of the ice age shivers

    SciTech Connect (OSTI)

    Kerr, R.A.

    1993-12-24T23:59:59.000Z

    There is now worldwide evidence of short-term increases in the earth's temperature during the last ice ages. This evidence comes from South American glaciers, Antarctic ice cores, and sediment cores from the tropical oceans, as well as Greenland ice cores. Researcher are unsure of the causes of these fluctuations. Some speculate a means for transmitting a climate signal from the North Atlantic to the rest of the world, while others look to some shorter-term version of the orbital variations that pace the cycle of the ice ages.

  20. Call for Papers Web Graphics

    E-Print Network [OSTI]

    Lau, W. H. Nynson

    Call for Papers Web Graphics Special Issue of IEEE Computer Graphics & Applications Guest Editors a migration of traditional applications to run on the Web environment and a growing demand for more powerful web-based applications. Fused by the increasing availability and dramatic reduction in the cost of 3D

  1. Packages in the `graphics' bundle D. P. Carlisle

    E-Print Network [OSTI]

    Packages in the `graphics' bundle D. P. Carlisle The Graphics packages 7 4.1 Package Options Graphics Files . . . . . . . . . . . . . . . . . . . . . . .* * 9 4.5 Other commands in the graphics

  2. Packages in the `graphics' bundle D. P. Carlisle

    E-Print Network [OSTI]

    Stein, William

    Packages in the `graphics' bundle D. P. Carlisle The Graphics packages 6 4.1 Package Options Graphics Files . . . . . . . . . . . . . . . . . . . . . . .* * 8 4.5 Other commands in the graphics

  3. Exploratory Data Graphics for Repeated Measures Data

    E-Print Network [OSTI]

    Robert E. Weiss

    2011-01-01T23:59:59.000Z

    of statis- t i c a l graphics ( w i t h discussion). Journalo t s . In Computing and Graphics in Statistics, eds. A . BCheshire, Connecticut: Graphics Press. [27] U n w i n ,

  4. How atmospheric ice forms | EMSL

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

    atmospheric ice forms How atmospheric ice forms Released: September 08, 2014 New insights into atmospheric ice formation could improve climate models This study advances our...

  5. Arctic ice islands

    SciTech Connect (OSTI)

    Sackinger, W.M.; Jeffries, M.O.; Lu, M.C.; Li, F.C.

    1988-01-01T23:59:59.000Z

    The development of offshore oil and gas resources in the Arctic waters of Alaska requires offshore structures which successfully resist the lateral forces due to moving, drifting ice. Ice islands are floating, a tabular icebergs, up to 60 meters thick, of solid ice throughout their thickness. The ice islands are thus regarded as the strongest ice features in the Arctic; fixed offshore structures which can directly withstand the impact of ice islands are possible but in some locations may be so expensive as to make oilfield development uneconomic. The resolution of the ice island problem requires two research steps: (1) calculation of the probability of interaction between an ice island and an offshore structure in a given region; and (2) if the probability if sufficiently large, then the study of possible interactions between ice island and structure, to discover mitigative measures to deal with the moving ice island. The ice island research conducted during the 1983-1988 interval, which is summarized in this report, was concerned with the first step. Monte Carlo simulations of ice island generation and movement suggest that ice island lifetimes range from 0 to 70 years, and that 85% of the lifetimes are less then 35 years. The simulation shows a mean value of 18 ice islands present at any time in the Arctic Ocean, with a 90% probability of less than 30 ice islands. At this time, approximately 34 ice islands are known, from observations, to exist in the Arctic Ocean, not including the 10-meter thick class of ice islands. Return interval plots from the simulation show that coastal zones of the Beaufort and Chukchi Seas, already leased for oil development, have ice island recurrences of 10 to 100 years. This implies that the ice island hazard must be considered thoroughly, and appropriate safety measures adopted, when offshore oil production plans are formulated for the Alaskan Arctic offshore. 132 refs., 161 figs., 17 tabs.

  6. Logo Turtle Graphics for the Lisp Machine

    E-Print Network [OSTI]

    Lieberman, Henry

    1981-05-05T23:59:59.000Z

    This paper is a manual for an implementation of Logo graphics primitives in Lisp on the MIT Lisp Machine. The graphics system provides:

  7. The effect of selective desorption mechanisms during interstellar ice formation

    E-Print Network [OSTI]

    Kalvans, Juris

    2015-01-01T23:59:59.000Z

    Major components of ices on interstellar grains in molecular clouds - water and carbon oxides - occur at various optical depths. This implies that selective desorption mechanisms are at work. An astrochemical model of a contracting low-mass molecular cloud core is presented. Ice was treated as consisting of the surface and three subsurface layers (sublayers). Photodesorption, reactive desorption, and indirect reactive desorption were investigated. The latter manifests itself through desorption from H+H reaction on grains. Desorption of shallow subsurface species was included. Modeling results suggest the existence of a "photon-dominated ice" during the early phases of core contraction. Subsurface ice is chemically processed by interstellar photons, which produces complex organic molecules. Desorption from the subsurface layer results in high COM gas-phase abundances at Av = 2.4...10mag. This may contribute towards an explanation for COM observations in dark cores. It was found that photodesorption mostly gove...

  8. nature photonics | VOL 1 | OCTOBER 2007 | www.nature.com/naturephotonics 551 elting polar ice caps or the

    E-Print Network [OSTI]

    Zheludev, Nikolay

    polar ice caps or the fantasy of freezing oceans in cataclysmic Hollywood films are graphic arranged, undergoes a phase change to the regular crystalline atomic construction of ice on freezing, and back on melting. This is a phase change between disordered and ordered states. So what use

  9. Decoupled Sampling for Graphics Pipelines

    E-Print Network [OSTI]

    Ragan-Kelley, Jonathan Millar

    We propose a generalized approach to decoupling shading from visibility sampling in graphics pipelines, which we call decoupled sampling. Decoupled sampling enables stochastic supersampling of motion and defocus blur at ...

  10. Graphical Models Michael I. Jordan

    E-Print Network [OSTI]

    Jordan, Michael I.

    Graphical Models Michael I. Jordan Computer Science Division and Department of Statistics; error­control coding. 1. Introduction The fields of Statistics and Computer Science have generally statistics. However, by providing general machinery for manipulating joint probability distribu­ tions

  11. RealityEngine Graphics Kurt Akeley

    E-Print Network [OSTI]

    Ramamoorthi, Ravi

    RealityEngine Graphics Kurt Akeley Silicon Graphics Computer Systems Abstract The RealityEngineTM graphics system is the first of a new genera- tion of systems designed primarily to render texture mapped, an- tialiased polygons. This paper describes the architecture of the RealityEngine graphics system

  12. 1Computer Graphics 15-462 Announcements

    E-Print Network [OSTI]

    Treuille, Adrien

    1Computer Graphics 15-462 Announcements Ray tracer is due in five days ­ you should have started Active Simulations Control Systems COMPUTER GRAPHICS 15-462 #12;3Computer Graphics 15-462 Overview;4Computer Graphics 15-462 Dynamic Simulation · Realistic motion · High-level control · Design of control

  13. Beamer graphics problem solved Abhijit Champanerkar

    E-Print Network [OSTI]

    Champanerkar, Abhijit

    Beamer graphics problem solved Abhijit Champanerkar College of Staten Island, CUNY January 15, 2009 Abhijit Champanerkar (CSI, CUNY) Beamer graphics problem solved #12;I wanted to get the following and not on a Mac :( Abhijit Champanerkar (CSI, CUNY) Beamer graphics problem solved #12;Graphics Problem: Figure

  14. Ice electrode electrolytic cell

    DOE Patents [OSTI]

    Glenn, David F. (Idaho Falls, ID); Suciu, Dan F. (Idaho Falls, ID); Harris, Taryl L. (Idaho Falls, ID); Ingram, Jani C. (Idaho Falls, ID)

    1993-01-01T23:59:59.000Z

    This invention relates to a method and apparatus for removing heavy metals from waste water, soils, or process streams by electrolytic cell means. The method includes cooling a cell cathode to form an ice layer over the cathode and then applying an electric current to deposit a layer of the heavy metal over the ice. The metal is then easily removed after melting the ice. In a second embodiment, the same ice-covered electrode can be employed to form powdered metals.

  15. Ice electrode electrolytic cell

    DOE Patents [OSTI]

    Glenn, D.F.; Suciu, D.F.; Harris, T.L.; Ingram, J.C.

    1993-04-06T23:59:59.000Z

    This invention relates to a method and apparatus for removing heavy metals from waste water, soils, or process streams by electrolytic cell means. The method includes cooling a cell cathode to form an ice layer over the cathode and then applying an electric current to deposit a layer of the heavy metal over the ice. The metal is then easily removed after melting the ice. In a second embodiment, the same ice-covered electrode can be employed to form powdered metals.

  16. Tracking Graphics State forTracking Graphics State for Network RenderingNetwork Rendering

    E-Print Network [OSTI]

    Pratt, Vaughan

    Tracking Graphics State forTracking Graphics State for Network RenderingNetwork Rendering Ian Buck 2000 Distributed GraphicsDistributed Graphics Application Application Application Renderer Renderer Renderer Network How to manage distributed graphics applications, renderers, and displays? #12;HWWS 2000

  17. Hayaku: Designing and Optimizing Finely Tuned and Portable Interactive Graphics with a Graphical Compiler

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Hayaku: Designing and Optimizing Finely Tuned and Portable Interactive Graphics with a Graphical, France stephane.conversy@enac.fr ABSTRACT Although reactive and graphically rich interfaces are now that supports de- signing finely tuned interactive graphics. With Hayaku, a designer can abstract graphics

  18. Prevalence of the Antarctic Circumpolar Wave over the last two millenia recorded in Dronning Maud Land ice

    E-Print Network [OSTI]

    Fischer, Hubertus

    on sea salt aerosol deposition in the study area of the new EPICA (European Project for Ice Coring in Antarctica) deep drilling in Dronning Maud Land (DML), Antarctica, has been investigated. Comparison of ice core records with reanalysis data showed that recent sea salt concentrations are strongly influenced

  19. Soil Physicochemical Characteristics from Ice Wedge Polygons, Barrow, Alaska, Ver. 1

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

    Chowdhury, Taniya

    This dataset provides details about soil cores (active layer and permafrost) collected from ice-wedge polygons during field expeditions to Barrow Environmental Observatory, Alaska in April, 2012 and 2013. Core information available are exact core locations; soil horizon descriptions and characteristics; and fundamental soil physico-chemical properties.

  20. PLOT: A UNIX PROGRAM FOR INCLUDING GRAPHICS IN DOCUMENTS

    E-Print Network [OSTI]

    Curtis, Pavel

    2013-01-01T23:59:59.000Z

    simple, easy-to-read graphics language designed specificallyPROGRAM FOR INCLUDING GRAPHICS IN DOCUMENTS Pavel Curtismeanings as in the GRAFPAC graphics system. Definl. ~ tions

  1. Polymer Field-Theory Simulations on Graphics Processing Units

    E-Print Network [OSTI]

    Kris T. Delaney; Glenn H. Fredrickson

    2012-04-24T23:59:59.000Z

    We report the first CUDA graphics-processing-unit (GPU) implementation of the polymer field-theoretic simulation framework for determining fully fluctuating expectation values of equilibrium properties for periodic and select aperiodic polymer systems. Our implementation is suitable both for self-consistent field theory (mean-field) solutions of the field equations, and for fully fluctuating simulations using the complex Langevin approach. Running on NVIDIA Tesla T20 series GPUs, we find double-precision speedups of up to 30x compared to single-core serial calculations on a recent reference CPU, while single-precision calculations proceed up to 60x faster than those on the single CPU core. Due to intensive communications overhead, an MPI implementation running on 64 CPU cores remains two times slower than a single GPU.

  2. Fractal Graphics Proprietary Limited 39 Fairway, Nedlands,

    E-Print Network [OSTI]

    Boschetti, Fabio

    1 Fractal Graphics Proprietary Limited 39 Fairway, Nedlands, Western Australia, Australia 6009 djh@fractalgraphics.com.au 2 Fractal Graphics Proprietary Limited 39 Fairway, Nedlands, Western Australia, Australia 6009 nja

  3. Probabilistic Graphical Model Representation in Phylogenetics

    E-Print Network [OSTI]

    Hö hna, Sebastian; Heath, Tracy A.; Boussau, Bastien; Landis, Michael J.; Ronquist, Fredrik; Huelsenbeck, John P.

    2014-06-20T23:59:59.000Z

    models, to facilitate communication among phylogeneticists and in the development of generic software for simulation and statistical inference. Here, we provide an introduction to graphical models for phylogeneticists and extend the standard graphical...

  4. Approximate inference in Gaussian graphical models

    E-Print Network [OSTI]

    Malioutov, Dmitry M., 1981-

    2008-01-01T23:59:59.000Z

    The focus of this thesis is approximate inference in Gaussian graphical models. A graphical model is a family of probability distributions in which the structure of interactions among the random variables is captured by a ...

  5. Extending expectation propagation for graphical models

    E-Print Network [OSTI]

    Qi, Yuan, 1974-

    2005-01-01T23:59:59.000Z

    Graphical models have been widely used in many applications, ranging from human behavior recognition to wireless signal detection. However, efficient inference and learning techniques for graphical models are needed to ...

  6. pMSSM Dark Matter Searches on Ice

    SciTech Connect (OSTI)

    Cotta, R.C.; /SLAC; Howe, K.T.K.; /SLAC /Stanford U., Phys. Dept.; Hewett, J.L.; Rizzo, T.G.; /SLAC

    2011-08-12T23:59:59.000Z

    We explore the capability of the IceCube/Deepcore array to discover signal neutrinos resulting from the annihilations of Supersymmetric WIMPS that may be captured in the solar core. In this analysis, we use a previously generated set of {approx} 70k model points in the 19-dimensional parameter space of the pMSSM which satisfy existing experimental and theoretical constraints. Our calculations employ a realistic estimate of the IceCube/DeepCore effective area that has been modeled by the IceCube collaboration. We find that a large fraction of the pMSSM models are shown to have significant signal rates in the anticipated IceCube/DeepCore 1825 day dataset, including some prospects for an early discovery. Many models where the LSP only constitutes a small fraction of the total dark matter relic density are found to have observable rates. We investigate in detail the dependence of the signal neutrino fluxes on the LSP mass, weak eigenstate composition, annihilation products and thermal relic density, as well as on the spin-independent and spin-dependent scattering cross sections. Lastly, We compare the model coverage of IceCube/DeepCore to that obtainable in near-future direct detection experiments and to pMSSM searches at the 7 TeV LHC.

  7. Transporting Dry Ice

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

    Requirements for Shipping Dry Ice IATA PI 904 Source: Reg of the Day from ERCweb 2006 Environmental Resource Center | 919-469-1585 | webmaster@ercweb.com http:...

  8. Ice Drilling Gallonmilkjugs

    E-Print Network [OSTI]

    Saffman, Mark

    Ice Drilling Materials · Gallonmilkjugs · Syringes,largeand small · Pitchers · Spraybottles · 13x9? ·Isitbettertosquirtthewaterslowlyorasquicklyaspossible? ·Doestherateatwhichyousquirtthewaterchangethediameteroftheholes? ·Doesthetypeof`drill

  9. Sandia National Laboratories: ICED

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

    Paper Presented at American Society of Mechanical Engineers' (ASME) 2012 Internal Combustion Engine Division (ICED) Conference On August 28, 2013, in CRF, Energy, Energy...

  10. Mobile Ice Nucleus Spectrometer

    SciTech Connect (OSTI)

    Kulkarni, Gourihar R.; Kok, G. L.

    2012-05-07T23:59:59.000Z

    This first year report presents results from a computational fluid dynamics (CFD) study to assess the flow and temperature profiles within the mobile ice nucleus spectrometer.

  11. Graphic Designer Student Involvement and Leadership

    E-Print Network [OSTI]

    Subramanian, Venkat

    Graphic Designer Student Involvement and Leadership Position Overview The Graphic Designer standards of the Student Involvement and Leadership brand guardrails · Complete other duties as assigned-Design, and Illustrator · Must have experience creating print and web graphics, flyers, and other promotional materials

  12. 1Computer Graphics 15-462 Announcements

    E-Print Network [OSTI]

    Treuille, Adrien

    1Computer Graphics 15-462 Announcements Midterms back at end of class ½ lecture and ½ demo in mocap lab Have you started on the ray tracer? If not, please do... due April 10th #12;2Computer Graphics 15 of Data Equipment Low-level Processing of Data Higher-level Processing of Data COMPUTER GRAPHICS 15-462 10

  13. Mathematical Optimization in Graphics and Vision

    E-Print Network [OSTI]

    Mathematical Optimization in Graphics and Vision Luiz Velho Paulo Cezar Pinto Carvalho IMPA - Instituto de Matemática Pura e Aplicada Course ScheduleCourse Schedule Module 1 ­ Computer Graphics to Answer · Why optimization is important for graphics? ­ Problems and Solutions · How optimization can

  14. Interactive Database Access with Statistics and Graphics

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    DbAccess The Manual Interactive Database Access with Statistics and Graphics Version 2.1.1 D. M and graphical needs of NSTX Physicists. Flexible views and joins are possible, including options for complex SQL General Atomics (GA Plot Objects) adds extensive graphical and interactive capabilities (and documentation

  15. Course Focus HORT 225: Landscape Graphics I

    E-Print Network [OSTI]

    Dyer, Bill

    Course Focus HORT 225: Landscape Graphics I By Rebekah VanWieren The last words I include unique graphic representation styles. The course begins by looking at the diversity of work of the course is spent learning and exploring the various graphic communication tools used to visualize

  16. Module name: Interactive computer graphics Abbreviation: ICG

    E-Print Network [OSTI]

    Ahlers, Volker - Fakultät IV

    Module name: Interactive computer graphics Abbreviation: ICG Study semester: 2 nd semester (SS majoring in "Graphics and Visualization" Teaching methods/SWS: 2 SWS lecture with approx. 15 students 2 SWS: Computer Vision, cryptography and algorithms, computer graphics lecture in Bachelor study program Learning

  17. INCREASING RENDERING PERFORMANCE OF GRAPHICS HARDWARE

    E-Print Network [OSTI]

    Whitton, Mary C.

    a compute-on-demand paradigm for the design of high-speed and energy-efficient graphics components. The goalINCREASING RENDERING PERFORMANCE OF GRAPHICS HARDWARE Justin Hensley A dissertation submitted RIGHTS RESERVED ii #12;ABSTRACT JUSTIN HENSLEY: Increasing Rendering Performance of Graphics Hardware

  18. Scientific Foundations of Computer Graphics Thomas Larsson

    E-Print Network [OSTI]

    Larsson, Thomas

    Scientific Foundations of Computer Graphics Thomas Larsson Department of Computer Engineering M methodological framework and research methods? In this paper, the nature of computer graphics is discussed from a theory of science perspective. The research methods of computer graphics are discussed and reasons

  19. An Evaluation of Graphical Context When the Graphics are Outside of the Task Area

    E-Print Network [OSTI]

    An Evaluation of Graphical Context When the Graphics are Outside of the Task Area Cindy M of an augmentation. This paper describes the results of an experiment to evaluate the effects of graphical context in a Lego block placement task when the graphics are located outside of the task area. Four conditions were

  20. Ice particle size matters | EMSL

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

    Ice particle size matters Ice particle size matters Released: May 04, 2014 Fine-tuning cloud models for improved climate predictions The Science Arctic clouds are widespread and...

  1. 1 Introduction Towards Better Graphics for Multivariate Anal-

    E-Print Network [OSTI]

    Thioulouse, Jean

    1 Introduction Summary Keywords: Towards Better Graphics for Multivariate Anal- ysis, interactive graphics, factor map, principal component analysis Dynamic graphics are gaining more and more popularity with the availabil- ity of powerfull microcomputers and user-friendly graphical interfaces

  2. Core Specialization

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

    cores per node for handling system services, and thus reduce the effects of timing jitter due to interruptions from the operating system at the expense of (possibly) requiring...

  3. Holocene climate variability archived in the Puruogangri ice cap on the central Tibetan Plateau

    E-Print Network [OSTI]

    Howat, Ian M.

    ) climate changes and providing evidence that the high plateau may be quite sensitive to the 20thHolocene climate variability archived in the Puruogangri ice cap on the central Tibetan Plateau, 109017 Moscow, Russia ABSTRACT. Two ice cores (118.4 and 214.7 m in length) were collected in 2000 from

  4. CT Scans of Cores Metadata, Barrow, Alaska 2015

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

    Katie McKnight; Tim Kneafsey; Craig Ulrich

    Individual ice cores were collected from Barrow Environmental Observatory in Barrow, Alaska, throughout 2013 and 2014. Cores were drilled along different transects to sample polygonal features (i.e. the trough, center and rim of high, transitional and low center polygons). Most cores were drilled around 1 meter in depth and a few deep cores were drilled around 3 meters in depth. Three-dimensional images of the frozen cores were constructed using a medical X-ray computed tomography (CT) scanner. TIFF files can be uploaded to ImageJ (an open-source imaging software) to examine soil structure and densities within each core.

  5. Reionization on ice

    E-Print Network [OSTI]

    C. C. Dudley; M. Imanishi; P. R. Maloney

    2006-02-15T23:59:59.000Z

    The case for substantial far infrared ice emission in local ultraluminous infrared galaxies, expected based on the presence of mid-infrared ice absorption in their spectra and the known far infrared optical properties of ice, is still largely unsupported by direct observation owing to insufficient far infrared spectral coverage. Some marginal supportive evidence is presented here. A clear consequence of far infrared ice emission is the need to extend the range of redshifts considered for submillimeter sources. This is demonstrated via the example of HDF 850.1. The solid phase of the ISM during reionization may be dominated by ice, and this could lead to the presence of reionization sources in submillimeter source catalogs. Submillimeter sources not detected at 24 micron in the GOODS-N field are examined. Two candidate reionization sources are identified at 3.6 micron through possible Gunn-Peterson saturation in the Z band.

  6. Core analysis workstation development and verification

    SciTech Connect (OSTI)

    Mays, C.W.; Kochendarfer, R.A.; Mays, B.E.

    1987-01-01T23:59:59.000Z

    An engineering workstation utilizing a three-dimensional reactor simulator along with a series of auxiliary programs has been developed for use in predicting core reactivity and power distributions. This workstation can be used by both core analysis and core operations personnel. Expected applications are power distribution analyses, technical specification limit verification, and various types of reactivity analyses. Reactor operations personnel can quickly simulate load follow or other reactor maneuvers and, through the interactive graphics capability of the personal computer, the reactor responses, such as power distribution and control rod position, can be displayed and understood by operations personnel.

  7. Volume 0 (1981), Number 0 pp. 114 COMPUTER GRAPHICS forum Collective Crowd Formation Transform with Mutual

    E-Print Network [OSTI]

    Deng, Zhigang

    1981-01-01T23:59:59.000Z

    pleasing group formation transition and control. Its core idea is to transform crowd formation shapesVolume 0 (1981), Number 0 pp. 1­14 COMPUTER GRAPHICS forum Collective Crowd Formation Transform of Houston, USA Abstract This paper introduces a new crowd formation transform approach to achieve visually

  8. Life Cycle of Sea-Ice Frazil, or grease ice

    E-Print Network [OSTI]

    Washington at Seattle, University of

    of Sea Ice away from surface, long crystals as congelation ice (frozen on from below) Brine Channels within the ice (~width of human hair) Brine rejected from ice (4-10psu), but concentrates in brine from AWI #12;Brine Volume and Salinity From Thomas and Dieckmann 2002, Science .... adapted from papers

  9. 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

  10. Ice Cream with a Heart Create a new Clemson Ice

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    Ice Cream with a Heart Contest! Create a new Clemson Ice Cream flavor! Raise money for your favorite charity! Win a free Clemson Ice Cream party for your organization! Enter at www organizations. The contest is called Ice Cream with a Heart and its purpose is to help student organizations

  11. Monday, March 13, 2006 MARS: CORE TO CLOUDS

    E-Print Network [OSTI]

    Rathbun, Julie A.

    with current orbital configurations. We run the model for five years with a northern water ice cap then release Core [#1500] We present new melting data in the system Fe-Ni-S at Martian core pressures, using multi. Clouds, Cap, and Consequences: Outflow Events and Mars Hesperian Climate [#1484] We focus on how outflows

  12. An ice shelf breakup

    SciTech Connect (OSTI)

    Fahnestock, M. [Univ. of Maryland, College Park, MD (United States)

    1996-02-09T23:59:59.000Z

    Glaciers and ice sheets are controlled by the climate and must change if the conditions that led to their current configurations are changing. These ice masses exist at the interface between the atmosphere, which provides sustaining snowfall and thermal regulation, and the land, which provides a stable base and in many cases the elevation required to reach suitably cold conditions. Ice sheets and glaciers are distributed around the globe and can serve as potential indicators of past climate variability and current climatic trends. 9 refs.

  13. Designing for effective stationkeeping in ice

    E-Print Network [OSTI]

    Nørvåg, Kjetil

    Designing for effective stationkeeping in ice CeSOS Highlights and AMOS Visions Conference DP Ice loads Ice #12;Effective stationkeeping in ice 1. Effective ship design. 2. An effective Ice Management system. 3. Effective strategies for the DP control system to compensate ice forces. #12;Ice

  14. Fermilab | Graphic Standards at Fermilab

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC) Environmental Assessments (EA)Budget » FYU.S. DOEFigureTip ofTheGraphic Standards at

  15. Graphic Services | The Ames Laboratory

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC) Environmental AssessmentsGeoffrey(SC) GettingGitGraduateGrantsGraphene'sGraphics

  16. Fluid Migration During Ice/Rock Planetesimal Differentiation

    E-Print Network [OSTI]

    Raney, Robert 1987-

    2012-12-12T23:59:59.000Z

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

  17. Global ice sheet modeling

    SciTech Connect (OSTI)

    Hughes, T.J.; Fastook, J.L. [Univ. of Maine, Orono, ME (United States). Institute for Quaternary Studies

    1994-05-01T23:59:59.000Z

    The University of Maine conducted this study for Pacific Northwest Laboratory (PNL) as part of a global climate modeling task for site characterization of the potential nuclear waste respository site at Yucca Mountain, NV. The purpose of the study was to develop a global ice sheet dynamics model that will forecast the three-dimensional configuration of global ice sheets for specific climate change scenarios. The objective of the third (final) year of the work was to produce ice sheet data for glaciation scenarios covering the next 100,000 years. This was accomplished using both the map-plane and flowband solutions of our time-dependent, finite-element gridpoint model. The theory and equations used to develop the ice sheet models are presented. Three future scenarios were simulated by the model and results are discussed.

  18. VAX-based graphics mail system

    SciTech Connect (OSTI)

    Wiltzius, D.P.

    1985-01-11T23:59:59.000Z

    Graphics messages (freehand drawings, text, and symbols) can be interactively created using an intelligent graphics terminal (Tektronix 4115B) and selectively sent to other graphics terminals for display, editing, and return transmission. This VAX-based program is run as several detached process to handle the message routing. Inter-process communication is achieved with VMS mailboxes and asynchronous software traps (AST's) are utilized for all input in order to maintain low system overhead and fast, asynchronous response.

  19. Ice Formation in Gas-Diffusion Layers

    E-Print Network [OSTI]

    Dursch, Thomas

    2013-01-01T23:59:59.000Z

    the University of California. Ice Formation in Gas-Diffusionsub-freezing conditions, ice forms in the gas-diffusionstrategies exist to prevent ice formation, there is little

  20. BSc Computing Year 3 Graphics Programming

    E-Print Network [OSTI]

    Hill, Gary

    BSc Computing Year 3 Graphics Programming 3D Maze Room Assignment Two by Richard M. Mann: 20032144 .................................................................................7 Figure 4: Controls Key-Map ......................................................................8

  1. Name: Donald P. Greenberg Title: Director, Program of Computer Graphics; Jacob Schurman Professor of Computer Graphics

    E-Print Network [OSTI]

    Keinan, Alon

    Name: Donald P. Greenberg Title: Director, Program of Computer Graphics; Jacob Schurman Professor of Computer Graphics Office: 580 Rhodes Hall Phone: 6072557444 Email: dpg5@cornell.edu University Activities · Director, Program of Computer Graphics Graduate Fields · Architecture Science, Computer

  2. Computer Graphics Volume 15, Number3 August 1981 A REFLECTANCE MODEL FOR COMPUTER GRAPHICS

    E-Print Network [OSTI]

    O'Brien, James F.

    Computer Graphics Volume 15, Number3 August 1981 A REFLECTANCE MODEL FOR COMPUTER GRAPHICS Robert L. Cook Program of Computer Graphics Cornell University Ithaca, New York 14853 Kenneth E. Torrance Sibley with incidence angle. The paper presents a method for obtaining the spectral energy distribution of the light

  3. Photodesorption of ices I: CO, N2 and CO2

    E-Print Network [OSTI]

    Karin I. Oberg; Ewine F. van Dishoeck; Harold Linnartz

    2009-01-23T23:59:59.000Z

    A longstanding problem in astrochemistry is how molecules can be maintained in the gas phase in dense inter- and circumstellar regions. Photodesorption is a non-thermal desorption mechanism, which may explain the small amounts of observed cold gas in cloud cores and disk mid-planes. This paper aims to determine the UV photodesorption yields and to constrain the photodesorption mechanisms of three astrochemically relevant ices: CO, N2 and CO2. In addition, the possibility of co-desorption in mixed and layered CO:N2 ices is explored. The ice photodesorption is studied experimentally under ultra high vacuum conditions and at 15-60 K using a hydrogen discharge lamp (7-10.5 eV). The ice desorption during irradiation is monitored by reflection absorption infrared spectroscopy of the ice and simultaneous mass spectrometry of the desorbed molecules. Both the UV photodesorption yields per incident photon and the photodesorption mechanisms are molecule specific. CO photodesorbs without dissociation from the surface layer of the ice. N2, which lacks an electronic transition in this wavelength range, has a photodesorption yield that is more than an order of magnitude lower. This yield increases significantly due to co-desorption when N2 is mixed in with or layered on top of CO ice. CO2 photodesorbs through dissociation and subsequent recombination from the top 10 layers of the ice. At low temperatures (15-18 K) the derived photodesorption yields are 2.7x10^-3 and CO2 photodesorption yield is 1.2x10^-3x(1-e^(-X/2.9)) + 1.1x10^-3x(1-e^(-X/4.6)) molecules photon-1, where X is the ice thickness in monolayers and the two parts of the expression represent a CO2 and CO photodesorption pathway.

  4. Version 2.9 NJIT Graphic Standards | 2

    E-Print Network [OSTI]

    Bieber, Michael

    Graphic Standards Guidelines March 2006 Version 2.9 #12;NJIT Graphic Standards | 2 Table Graphic Standards | 3 About these guidelines These graphic standards guidelines are an expression as New Jersey's Science & Technology University. #12;NJIT Graphic Standards | 4 The NJIT signature (logo

  5. Ice Heating Up Cold Clouds | EMSL

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

    Ice Heating Up Cold Clouds Ice Heating Up Cold Clouds Released: October 04, 2011 In a heated battle, ice crystals win the competition for cloud water vapor The mighty cloud ice...

  6. Coherent radar ice thickness measurements over the Greenland ice sheet

    E-Print Network [OSTI]

    Gogineni, S. Prasad; Tammana, Dilip; Braaten, David A.; Leuschen, C.; Legarsky, J.; Kanagaratnam, P.; Stiles, J.; Allen, C.; Jezek, K.; Akins, T.

    2001-12-27T23:59:59.000Z

    We developed two 150-MHz coherent radar depth sounders for ice thickness measurements over the Greenland ice sheet. We developed one of these using connectorized components and the other using radio frequency integrated circuits (RFICs). Both...

  7. An Experimental Evaluation of Computer Graphics Imagery

    E-Print Network [OSTI]

    Meyer, Gary

    An Experimental Evaluation of Computer Graphics Imagery GARY W. MEYER, HOLLY E. RUSHMEIER, MICHAEL intensities for diffuse environments was conducted. Measurements of radiant energy flux densities are compared, photometry, and thresholding; 1.3.3 [Computer Graphics]: Picture/Image Generation-display algorithms; viewing

  8. Graphical models, causal inference, and econometric models

    E-Print Network [OSTI]

    Spirtes, Peter

    Graphical models, causal inference, and econometric models Peter Spirtes Abstract A graphical model modeling has historical ties to causal modeling in econometrics and other social sciences, there have been isolated from the econometric tradition. In this paper I will describe a number of recent developments

  9. School of Art Division of Graphic Design

    E-Print Network [OSTI]

    Moore, Paul A.

    .372.7763 419.372.6955 fax lyoung@bgsu.edu www.bgsu.edu/art BOWLING GREEN STATE UNIVERSITY Division of Graphic.bgsu.edu/art BOWLING GREEN STATE UNIVERSITY 1) Be of Junior (60+ hours) or Senior (90+ hours) standing withinSchool of Art Division of Graphic Design 1020 Fine Arts Center Bowling Green, Ohio 43403-0204 419

  10. Moby/plc --Graphical Development of PLCAutomata ? ??

    E-Print Network [OSTI]

    Olderog, Ernst-Rüdiger

    Moby/plc -- Graphical Development of PLC­Automata ? ?? Josef Tapken and Henning Dierks University­Mail: ftapken,dierksg@informatik.uni­oldenburg.de Abstract. Moby/plc is a graphical design tool for PLC­ trollers (PLCs). In this paper we sketch the modelling language in use and some features of Moby/plc, like

  11. CSC6870 Computer Graphics II Bezier Curves

    E-Print Network [OSTI]

    Hua, Jing

    B inin i - = - = - CSC6870 Computer Graphics II Properties · End point interpolation. · Basis inin uu i n uu 0 )1()]1([1 CSC6870 Computer Graphics II Recursive Computation: The De Casteljau uu i n uu i n uB n i n i iniini inin i - - - -- - +-= - - - +- - = - = #12;CSC6870

  12. On the suitability of partially clathrated ice for analysis of concentration and 13 palaeo-atmospheric CO2

    E-Print Network [OSTI]

    Chappellaz, Jérôme

    dioxide stable carbon isotope ratio ice core bubble clathrate transformation EPICA Dome C Berkner Island form 3 May 2011 Accepted 4 May 2011 Available online 28 May 2011 Editor: P. DeMenocal Keywords: carbon The stable carbon isotopic signature of carbon dioxide (13 CO2) measured in the air occlusions of polar ice

  13. 5-1291-01-P2 INTERACTIVE GRAPHICS INTERSECTION DESIGN

    E-Print Network [OSTI]

    Texas at Austin, University of

    5-1291-01-P2 INTERACTIVE GRAPHICS INTERSECTION DESIGN SYSTEM (IGIDS) USERS MANUAL: UPDATE Graphics Intersection Design System (IGIDS) OCTOBER 2001 Performing Organization: Center for Transportation, graphics, design, IGIDS, user's manual, MicroStation, geometric design, environmental, hydraulics, right

  14. Power Consumption Characterization of a Graphics Processing Unit

    E-Print Network [OSTI]

    Skadron, Kevin

    .......................................................... 1 ENERGY AMBIGUITY OF MODERN GRAPHICS PROCESSORS ................. 2 POWER CONSUMPTIONPower Consumption Characterization of a Graphics Processing Unit A Thesis in STS 402 Presented.....................................................................................................................VI CHAPTER ONE: THE NEED FOR A POWER CHARACTERIZATION............... 1 HISTORY OF GRAPHICS PROCESSORS

  15. Statistical Design, Analysis and Graphics for the Guadalupe

    E-Print Network [OSTI]

    Statistical Design, Analysis and Graphics for the Guadalupe River Assessment Technical Memoranda Science Center (2013). Statistical Design, Analysis and Graphics for the Guadalupe River Assessment

  16. applications pacific graphics: Topics by E-print Network

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

    segmentations. 1. Introduction Mesh segmentation is an important problem in computer graphics, with applications Tal, Ayellet 2 Pacific Graphics 2014 J. Keyser, Y. J....

  17. Hail ice impact on composite structures at glancing angles

    E-Print Network [OSTI]

    Funai, Sho

    2012-01-01T23:59:59.000Z

    investigation of high velocity ice impacts on woven carbon/and ice sphere. .by trailing ice fragments. ..

  18. Interactive Visual Histories for Vector Graphics

    E-Print Network [OSTI]

    Scull, Craig

    2009-06-24T23:59:59.000Z

    Presentation and graphics software enables users to experiment with variations of illustrations. They can revisit recent editing operations using the ubiquitous undo command, but they are limited to sequential exploration. ...

  19. Efficient shadow algorithms on graphics hardware

    E-Print Network [OSTI]

    Chan, Eric, 1979-

    2005-01-01T23:59:59.000Z

    Shadows are important to computer graphics because they add realism and help the viewer identify spatial relationships. Shadows are also useful story-telling devices. For instance, artists carefully choose the shape, ...

  20. Software tools for the graphic designer

    E-Print Network [OSTI]

    Henigan, Nardy

    1983-01-01T23:59:59.000Z

    This thesis describes three packages of programs of interest to the graphic designers: (l) a tool for pointing at objects on the display monitor, (2) a tool for organizing sets of programs into interactive menus, and (3) ...

  1. Graphics processing units accelerated semiclassical initial value representation molecular dynamics

    SciTech Connect (OSTI)

    Tamascelli, Dario; Dambrosio, Francesco Saverio [Dipartimento di Fisica, Università degli Studi di Milano, via Celoria 16, 20133 Milano (Italy)] [Dipartimento di Fisica, Università degli Studi di Milano, via Celoria 16, 20133 Milano (Italy); Conte, Riccardo [Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322 (United States)] [Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322 (United States); Ceotto, Michele, E-mail: michele.ceotto@unimi.it [Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano (Italy)] [Dipartimento di Chimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano (Italy)

    2014-05-07T23:59:59.000Z

    This paper presents a Graphics Processing Units (GPUs) implementation of the Semiclassical Initial Value Representation (SC-IVR) propagator for vibrational molecular spectroscopy calculations. The time-averaging formulation of the SC-IVR for power spectrum calculations is employed. Details about the GPU implementation of the semiclassical code are provided. Four molecules with an increasing number of atoms are considered and the GPU-calculated vibrational frequencies perfectly match the benchmark values. The computational time scaling of two GPUs (NVIDIA Tesla C2075 and Kepler K20), respectively, versus two CPUs (Intel Core i5 and Intel Xeon E5-2687W) and the critical issues related to the GPU implementation are discussed. The resulting reduction in computational time and power consumption is significant and semiclassical GPU calculations are shown to be environment friendly.

  2. A graphics processor-based intranuclear cascade and evaporation simulation

    E-Print Network [OSTI]

    H. Wan Chan Tseung; C. Beltran

    2014-02-19T23:59:59.000Z

    Monte Carlo simulations of the transport of protons in human tissue have been deployed on graphics processing units (GPUs) with impressive results. To provide a more complete treatment of non-elastic nuclear interactions in these simulations, we developed a fast intranuclear cascade-evaporation simulation for the GPU. This can be used to model non-elastic proton collisions on any therapeutically relevant nuclei at incident energies between 20 and 250 MeV. Predictions are in good agreement with Geant4.9.6p2. It takes approximately 2 s to calculate $1\\times 10^6$ 200 MeV proton-$^{16}$O interactions on a NVIDIA GTX680 GPU. A speed-up factor of $\\sim$20 relative to one Intel i7-3820 core processor thread was achieved.

  3. Molecular Dynamics Simulation of Macromolecules Using Graphics Processing Unit

    E-Print Network [OSTI]

    Ji Xu; Ying Ren; Wei Ge; Xiang Yu; Xiaozhen Yang; Jinghai Li

    2010-01-21T23:59:59.000Z

    Molecular dynamics (MD) simulation is a powerful computational tool to study the behavior of macromolecular systems. But many simulations of this field are limited in spatial or temporal scale by the available computational resource. In recent years, graphics processing unit (GPU) provides unprecedented computational power for scientific applications. Many MD algorithms suit with the multithread nature of GPU. In this paper, MD algorithms for macromolecular systems that run entirely on GPU are presented. Compared to the MD simulation with free software GROMACS on a single CPU core, our codes achieve about 10 times speed-up on a single GPU. For validation, we have performed MD simulations of polymer crystallization on GPU, and the results observed perfectly agree with computations on CPU. Therefore, our single GPU codes have already provided an inexpensive alternative for macromolecular simulations on traditional CPU clusters and they can also be used as a basis to develop parallel GPU programs to further speedup the computations.

  4. Core Specialization

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisitingContract Management Fermi Site Office (FSO) FSOConvertingCopy ServicesCore

  5. Mesh Geometry Compression for Mobile Graphics Jongseok Lee

    E-Print Network [OSTI]

    Lee, Seungyong

    , for mobile graphics, API standards such as OpenGL ES and JSR-184 have been proposed [8], and the graphicsMesh Geometry Compression for Mobile Graphics Jongseok Lee POSTECH thirdeye@postech.ac.kr Sungyul--This paper presents a compression scheme for mesh geometry, which is suitable for mobile graphics. The main

  6. 1 Introduction Towards Better Graphics for Multivariate Anal

    E-Print Network [OSTI]

    Thioulouse, Jean

    1 Introduction Summary Keywords: Towards Better Graphics for Multivariate Anal­ ysis, exploratory data analysis, interactive graphics, factor map, principal component analysis Dynamic graphics­friendly graphical interfaces. Their help in analysing numerical data sets has been widely recognized, and the book

  7. Packages in the `graphics' bundle D. P. Carlisle

    E-Print Network [OSTI]

    Bloch, Ethan

    Packages in the `graphics' bundle D. P. Carlisle 1999/01/13 Contents 1 Introduction 2 2 Driver Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 The Graphics packages 7 4.1 Package Graphics Files . . . . . . . . . . . . . . . . . . . . . . . . 9 4.5 Other commands in the graphics package

  8. CSC6870 Computer Graphics I Illumination and Shading

    E-Print Network [OSTI]

    Hua, Jing

    CSC6870 Computer Graphics I Illumination and Shading CSC6870 Computer Graphics I Illumination shading ­ Flat Shading ­ Gourand Shading ­ Phone Shading CSC6870 Computer Graphics I Illumination Model-hoc, but is fast and easy. · Global models are more accurate, but much more expensive. CSC6870 Computer Graphics I

  9. Packages in the `graphics' bundle D. P. Carlisle

    E-Print Network [OSTI]

    Duncan, James S.

    Packages in the `graphics' bundle D. P. Carlisle 1996/10/29 Contents 1 Introduction 1 2 Driver Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 The Graphics packages 6 4.1 Package Graphics Files . . . . . . . . . . . . . . . . . . . . . . . . 8 4.5 Other commands in the graphics package

  10. Graphics Hardware (2006) M. Olano, P. Slusallek (Editors)

    E-Print Network [OSTI]

    Boldyreva, Alexandra

    Graphics Hardware (2006) M. Olano, P. Slusallek (Editors) A Digital Rights Enabled Graphics of Computing Georgia Institute of Technology, Atlanta, GA 30332 Abstract With the emergence of 3D graphics become a new design challenge. This paper presents a novel protection model for commercial graphics data

  11. 3-D Graphics in R Ohio State University

    E-Print Network [OSTI]

    Gotelli, Nicholas J.

    3-D Graphics in R Luke Keele Ohio State University December 6, 2005 Three dimensional graphics may. And it is a good choice, but to get publication quality 3-D graphics requires more work than typically re- quired to produce quality graphics with the wireframe command. The standard 3-D plot command in R is persp. While

  12. Information Graphics: An Untapped Resource for Digital Libraries

    E-Print Network [OSTI]

    Carberry, Sandra

    Information Graphics: An Untapped Resource for Digital Libraries Sandra Carberry Dept. of Computer graphics are non-pictorial graphics such as bar charts and line graphs that depict attributes of entities and relations among entities. Most information graphics appear- ing in popular media have a communicative goal

  13. Ice Core Paleoclimate Research Group Ellen Mosley-Thompson

    E-Print Network [OSTI]

    Howat, Ian M.

    is in the "Here and Now" #12;today Energy consumption growing Coal ­ 40% Natural gas ­ 20% Renewables ­ 20% Nuclear ­ 15% Oil / Other Petroleum ­ 5% World electricity 65% fossil fuels #12;... to unprecedented demands Looking ahead to 2030 ... the sustained growth in global demand for electricity is inevitable

  14. Image Content Engine (ICE)

    SciTech Connect (OSTI)

    Brase, J M

    2007-03-26T23:59:59.000Z

    The Image Content Engine (ICE) is being developed to provide cueing assistance to human image analysts faced with increasingly large and intractable amounts of image data. The ICE architecture includes user configurable feature extraction pipelines which produce intermediate feature vector and match surface files which can then be accessed by interactive relational queries. Application of the feature extraction algorithms to large collections of images may be extremely time consuming and is launched as a batch job on a Linux cluster. The query interface accesses only the intermediate files and returns candidate hits nearly instantaneously. Queries may be posed for individual objects or collections. The query interface prompts the user for feedback, and applies relevance feedback algorithms to revise the feature vector weighting and focus on relevant search results. Examples of feature extraction and both model-based and search-by-example queries are presented.

  15. Ice Cover on the Great Lakes NATIONALOCEANIC

    E-Print Network [OSTI]

    Ice Cover on the Great Lakes NATIONALOCEANIC AND ATMOSPHERIC ADMINISTRATION U.S. D EPARTMENT OF COMM ER CE Great Lakes Ice Cover facts since 1973 - 94.7% ice coverage in 1979 is the maximum on record - 9.5% ice coverage in 2002 is the lowest on record - 11.5% ice coverage in 1998, a strong El Nino

  16. Engineering Notes Ice Shape Characterization Using

    E-Print Network [OSTI]

    Tino, Peter

    Engineering Notes Ice Shape Characterization Using Self-Organizing Maps Stephen T. McClain Baylor. Introduction DURING the validation and verification of ice accretion codes, predicted ice shapes must be compared with experimental measurements of wind-tunnel or atmospheric ice shapes. Current methods for ice

  17. Hidden force floating ice

    E-Print Network [OSTI]

    Chang Q. Sun

    2015-01-17T23:59:59.000Z

    Because of the segmental specific-heat disparity of the hydrogen bond (O:H-O) and the Coulomb repulsion between oxygen ions, cooling elongates the O:H-O bond at freezing by stretching its containing angle and shortening the H-O bond with an association of larger O:H elongation, which makes ice less dense than water, allowing it to float.

  18. Ice Storm Supercomputer

    ScienceCinema (OSTI)

    None

    2013-05-28T23:59:59.000Z

    "A new Idaho National Laboratory supercomputer is helping scientists create more realistic simulations of nuclear fuel. Dubbed 'Ice Storm,' this 2048-processor machine allows researchers to model and predict the complex physics behind nuclear reactor behavior. And with a new visualization lab, the team can see the results of its simulations on the big screen." For more information about INL research, visit http://www.facebook.com/idahonationallaboratory.

  19. Greenland Ice Sheet Retreat Since the Little Ice Age

    E-Print Network [OSTI]

    Beitch, Marci Jillian

    2014-01-01T23:59:59.000Z

    and I. Willis (2012), Greenland's shrinking ice cover: "fastfluctuations in southeast Greenland, Nat. Geosci. , 5(6),T. Decker (2011), Analysis of Greenland marine- terminating

  20. A GRAPHICS PROCESSING UNIT IMPLEMENTATION OF THE PARTICLE FILTER Modern graphics cards for computers, and especially their

    E-Print Network [OSTI]

    Gustafsson, Fredrik

    A GRAPHICS PROCESSING UNIT IMPLEMENTATION OF THE PARTICLE FILTER ABSTRACT Modern graphics cards for computers, and especially their graphics processing units (GPUs), are designed for fast ren- dering of graphics. In order to achieve this GPUs are equipped with a parallel architecture which can be exploited

  1. Ice Mass Balance Buoy: An Instrument to Measure and Attribute Changes in Ice Thickness

    E-Print Network [OSTI]

    Geiger, Cathleen

    Ice Mass Balance Buoy: An Instrument to Measure and Attribute Changes in Ice Thickness Jacqueline A the Ice Mass Balance buoy (IMB) in response to the need for monitoring changes in the thickness of the Arctic sea ice cover. The IMB is an autonomous, ice-based system. IMB buoys provide a time series of ice

  2. NOTES AND CORRESPONDENCE Surface Melting over Ice Shelves and Ice Sheets as Assessed from Modeled

    E-Print Network [OSTI]

    Meissner, Katrin Juliane

    NOTES AND CORRESPONDENCE Surface Melting over Ice Shelves and Ice Sheets as Assessed from Modeled of ice shelves and their progenitor ice sheets. To explore the magnitude of surface melt occurring over modern ice shelves and ice sheets in a climate scenario forced by anthropogenic emissions of carbon

  3. The environmental record in glaciers and ice sheets

    SciTech Connect (OSTI)

    Oeschger, H.; Langway, C.C. Jr. (eds.)

    1989-01-01T23:59:59.000Z

    This book conveys from different points of view a sense of the variables involved in the formation and movement of glacial ice and the kinds of information held in the various glaciers. It also covers methodology and presents examples of recent findings and unexplored pathways. Verifying ice core chronology is a major challenge. Radioactive constituents such as {sup 14}C, {sup 10}Be, and {sup 81}Kr produced in the atmosphere by cosmic radiation can be useful for dating within the ranges of their respective half-lives. Abrupt changes in carbon dioxide concentration during an approximately 10,000-year period at a depth of about 2 kilometers in ice from the Dye 3 core (southern Greenland) and their evident correlation with changes in {sup 18}O values arouse great curiosity. Other abrupt (on a geologic time scale) changes in such parameters bear witness to large changes in climate in periods of a century or less. The presence of pollen testifies to the large body of unexploited information in these cores. Dating of pollen deposits, identification of species, and correlation of the resulting data with varve information on continental and ocean sediments should give new insight into climate change, species adaptation, forest migration, and back trajectories of air masses.

  4. Graphical calculus for Gaussian pure states

    E-Print Network [OSTI]

    Nicolas C. Menicucci; Steven T. Flammia; Peter van Loock

    2011-02-04T23:59:59.000Z

    We provide a unified graphical calculus for all Gaussian pure states, including graph transformation rules for all local and semi-local Gaussian unitary operations, as well as local quadrature measurements. We then use this graphical calculus to analyze continuous-variable (CV) cluster states, the essential resource for one-way quantum computing with CV systems. Current graphical approaches to CV cluster states are only valid in the unphysical limit of infinite squeezing, and the associated graph transformation rules only apply when the initial and final states are of this form. Our formalism applies to all Gaussian pure states and subsumes these rules in a natural way. In addition, the term "CV graph state" currently has several inequivalent definitions in use. Using this formalism we provide a single unifying definition that encompasses all of them. We provide many examples of how the formalism may be used in the context of CV cluster states: defining the "closest" CV cluster state to a given Gaussian pure state and quantifying the error in the approximation due to finite squeezing; analyzing the optimality of certain methods of generating CV cluster states; drawing connections between this new graphical formalism and bosonic Hamiltonians with Gaussian ground states, including those useful for CV one-way quantum computing; and deriving a graphical measure of bipartite entanglement for certain classes of CV cluster states. We mention other possible applications of this formalism and conclude with a brief note on fault tolerance in CV one-way quantum computing.

  5. ICE Pulse Oximeter Smart Alarm App Requirements

    E-Print Network [OSTI]

    Huth, Michael

    ICE Pulse Oximeter Smart Alarm App Requirements 6 March 2012 Revision 0 for an Integrated Clinical Environment (ICE) pulse oximetry monitoring app that provides.2 References [Purpose: List all ICE standards, and other standards and references

  6. ICE Raids: Compounding Production, Contradiction, and Capitalism

    E-Print Network [OSTI]

    Reas, Elizabeth I

    2009-01-01T23:59:59.000Z

    is just a cheap way of boosting ICE ‘criminal alien’ arrestRegardless of whether or not ICE is motivated by maintainingWorkers in America: Factories and ICE Raids Produce Citizens

  7. The ice sheet model The polythermal ice sheet

    E-Print Network [OSTI]

    Calov, Reinhard

    with a temperature at the pressure melting point, the latter being considered as a bi- nary mixture of ice and small a year. Sediment Sliding The sliding velocity over sediment reads which applies if the basal ice Hudson Bay and Hudson Strait has become temperate (see Figure 4d,e), fast basal sliding appears leading

  8. Back to regular view Print this page Getting to core of the problem

    E-Print Network [OSTI]

    Johnson, Andrew

    the technology, learned to drill for a core sample from the Minneapolis lake bed. He took it back to the National Drilling program are drilling rock below the ice, and by using software developed at the University available to other scientists, some of whom study global warming. Scientists drill for core samples so

  9. Therapeutic Hypothermia: Protective Cooling Using Medical Ice...

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

    Therapeutic Hypothermia: Protective Cooling Using Medical Ice Slurry Technology available for licensing: Proprietary method and equipment for making an ice slurry coolant to induce...

  10. Sandia National Laboratories: critical marginal ice zone

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

    marginal ice zone NASA Award for Marginal Ice Zone Observations and Process Experiment (MIZOPEX) On February 24, 2015, in Analysis, Climate, Modeling & Analysis, Monitoring, News,...

  11. Sandia National Laboratories: Marginal Ice Zone Observations...

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

    Marginal Ice Zone Observations and Processes Experiment mission Sierra Unmanned Aerial Vehicle to Begin Flights Over Arctic Sea Ice On July 25, 2013, in Climate, Customers &...

  12. Sandia National Laboratories: Arctic sea ice

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

    Arctic sea ice Sierra Unmanned Aerial Vehicle to Begin Flights Over Arctic Sea Ice On July 25, 2013, in Climate, Customers & Partners, Global, Monitoring, News, News & Events,...

  13. ARM - Measurement - Ice nuclei

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadap Documentation TDMADAP : XDC documentationBarrow,ice particleSize Distributiontypes ARMnuclei

  14. Dynamics of ice shelf rift propagation and iceberg calving inferred from geodetic and seismic observations

    E-Print Network [OSTI]

    Bassis, Jeremy N.

    2007-01-01T23:59:59.000Z

    2. Ice Shelves . . . . . . . . . . . . . . . . .5. Ice Rheology . . . . . . . . . . . . . 6.vi Calving Glaciers and Ice

  15. MEAT, POULTRY, Still contains ice

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    MEAT, POULTRY, SEAFOOD Still contains ice crystals and feels as cold, and ground meats Refreeze Discard Poultry and ground poultry Refreeze Discard Variety meats may safely re-freeze foods that s:ll contain ice crystals or that have been

  16. Computational Physics on Graphics Processing Units

    E-Print Network [OSTI]

    Harju, Ari; Federici-Canova, Filippo; Hakala, Samuli; Rantalaiho, Teemu

    2012-01-01T23:59:59.000Z

    The use of graphics processing units for scientific computations is an emerging strategy that can significantly speed up various different algorithms. In this review, we discuss advances made in the field of computational physics, focusing on classical molecular dynamics, and on quantum simulations for electronic structure calculations using the density functional theory, wave function techniques, and quantum field theory.

  17. Computational Physics on Graphics Processing Units

    E-Print Network [OSTI]

    Ari Harju; Topi Siro; Filippo Federici-Canova; Samuli Hakala; Teemu Rantalaiho

    2013-03-06T23:59:59.000Z

    The use of graphics processing units for scientific computations is an emerging strategy that can significantly speed up various different algorithms. In this review, we discuss advances made in the field of computational physics, focusing on classical molecular dynamics, and on quantum simulations for electronic structure calculations using the density functional theory, wave function techniques, and quantum field theory.

  18. CIS260: Computer Graphics Winter 1997

    E-Print Network [OSTI]

    Pang, Alex

    CIS260: Computer Graphics Winter 1997 Proposals: due February 18, 1997 Draft: due March 3, 1997 Presentation: March 10 ­ March 14, 1997 Demo: 8am ­ 11am, March 18, 1997 FINAL PROJECT You get to select your ­ on or before February 18, 1997 Give me at least 3 topics that you would like to work on for your final project

  19. Data-Driven Optimization for Modeling in Computer Graphics and Vision

    E-Print Network [OSTI]

    Yu, Lap Fai

    2013-01-01T23:59:59.000Z

    61 Clothing in Computer Graphics . . . . . . . . . . . . . .16 The Computer Graphics Perspective . . . . . .161 viii L IST OF F IGURES The 3D computer graphics

  20. QSAR of Progestogens: Use of a Priori and Computed Molecular Descriptors and Molecular Graphics

    E-Print Network [OSTI]

    Ferreira, Márcia M. C.

    QSAR of Progestogens: Use of a Priori and Computed Molecular Descriptors and Molecular Graphics) and molecular graphics and modeling descriptors were employed. Mo- lecular graphics and modeling studies

  1. High-throughput Characterization of Porous Materials Using Graphics Processing Units

    E-Print Network [OSTI]

    Kim, Jihan

    2013-01-01T23:59:59.000Z

    A.E. ; Purcell, T. Computer Graphics Forum 2007, 26(1), 80-of Porous Materials Using Graphics Processing Units Jihanof Porous Materials Using Graphics Processing Units Jihan

  2. Because It's Not There: Verbal Visuality and the Threat of Graphics in Interactive Fiction

    E-Print Network [OSTI]

    Kashtan, Aaron

    2009-01-01T23:59:59.000Z

    of the power of computer graphics, text still has access tothat are unavailable in graphics – including visual effects.Visuality and the Threat of Graphics in Interactive Fiction

  3. A comparison of grid-based techniques for Navier-Stokes fluid simulation in computer graphics

    E-Print Network [OSTI]

    Chrisman, Cameron

    2008-01-01T23:59:59.000Z

    in Computer Graphics 2. Previous Work . . . . . . .B. Applications in Computer Graphics II The Navier Stokesand Tricks for Real-Time Graphics. Pearson Higher Education,

  4. EFFICIENT PARALLELIZATION OF STOCHASTIC SIMULATION ALGORITHM FOR CHEMICALLY REACTING SYSTEMS ON THE GRAPHICS PROCESSING UNIT

    E-Print Network [OSTI]

    Li, Hong; Petzold, Linda

    2009-01-01T23:59:59.000Z

    REACTING SYSTEMS ON THE GRAPHICS PROCESSING UNIT H. Li ? L.The current generation of graphics processing units (GPU) issystems on the low cost graphics processing unit (GPU)

  5. Using wesBench to Study the Rendering Performance of Graphics Processing Units

    E-Print Network [OSTI]

    Bethel, Edward W.

    2010-01-01T23:59:59.000Z

    an NVIDIA Quadro FX 4500 graphics accelerator. The card is athe Rendering Performance of Graphics Processing Units E.January 8, 2010 Introduction Graphics operations consist of

  6. The Use of Graphics Calculator in a Matriculation Statistics Classroom: A Malaysian Perspective

    E-Print Network [OSTI]

    Krishnan, Saras; Idris, Noraini

    2013-01-01T23:59:59.000Z

    mathematics: Why graphics calculator? Proceedings of the 2Learning statistics with graphics calculator: A case study.Learning statistics with graphics calculator: Students’

  7. Large-scale Nanostructure Simulations from X-ray Scattering Data On Graphics Processor Clusters

    E-Print Network [OSTI]

    Sarje, Abhinav

    2012-01-01T23:59:59.000Z

    X-ray Scattering Data On Graphics Processor Clusters Abhinavaccelerators. General purpose graphics processors o?er ?nethe form factors on graphics processors. Form Factor Kernel

  8. Accelerated rescaling of single Monte Carlo simulation runs with the Graphics Processing Unit (GPU)

    E-Print Network [OSTI]

    Yang, Owen; Choi, Bernard

    2013-01-01T23:59:59.000Z

    using a massively parallel graphics processing unit,” Med.modulated light using a graphics processing unit,” J.speckle imaging data using graphics processing unit,” Opt.

  9. Object-Space Interference Detection on Programmable Graphics Hardware

    E-Print Network [OSTI]

    Zachmann, Gabriel

    Zachmann Abstract. We present a novel method for checking the intersection of polygonal models on graphics. GreÃ? and G. Zachmann Many algorithms have been proposed to utilize graphics hardware for the problem

  10. QSAR, Molecular Graphics and Modeling Study on -Lactam Antibiotics as

    E-Print Network [OSTI]

    Ferreira, Márcia M. C.

    QSAR, Molecular Graphics and Modeling Study on -Lactam Antibiotics as Substrates of the Multidrug of them in non-linear form. Molecular graphics and docking studies: 2D and 3D docking of some drugs

  11. Parallel processor-based raster graphics system architecture

    DOE Patents [OSTI]

    Littlefield, Richard J. (Seattle, WA)

    1990-01-01T23:59:59.000Z

    An apparatus for generating raster graphics images from the graphics command stream includes a plurality of graphics processors connected in parallel, each adapted to receive any part of the graphics command stream for processing the command stream part into pixel data. The apparatus also includes a frame buffer for mapping the pixel data to pixel locations and an interconnection network for interconnecting the graphics processors to the frame buffer. Through the interconnection network, each graphics processor may access any part of the frame buffer concurrently with another graphics processor accessing any other part of the frame buffer. The plurality of graphics processors can thereby transmit concurrently pixel data to pixel locations in the frame buffer.

  12. associations graphic analysis: Topics by E-print Network

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

    Bezier Curves CSC6870 Computer Graphics II Bezier Curve CSC6870Bpuc ip CSC6870 Computer Graphics II Bezier Curves (degree n) Curve: Control points Basis functionsB...

  13. Steven Landau President and Founder of Touch Graphics, Inc.

    E-Print Network [OSTI]

    Steven Landau President and Founder of Touch Graphics, Inc. Functional Near Infrared Spectroscopy- lopment, computer graphics, user interface design, and em- bedded system development. For any questions and neural correlates), and brain computer interfaces for control and communication. Bioengineering Seminar

  14. Graphics Hardware (2005) M. Meissner, B.-O. Schneider (Editors)

    E-Print Network [OSTI]

    Popovic, Jovan

    Graphics Hardware (2005) M. Meissner, B.- O. Schneider (Editors) A Reconfigurable Architecture,1 Frédo Durand1 1Massachusetts Institute of Technology 2Nokia Research Center Abstract Commodity graphics & F. Durand / A

  15. Global simulations of ice nucleation and ice supersaturation with an improved cloud scheme in the Community

    E-Print Network [OSTI]

    Gettelman, Andrew

    and supersaturation in CAM. The new model is able to reproduce field observations of ice mass and mixed phase cloud are sensitive to the parameterization of ice clouds. These results indicate that ice clouds are potentiallyGlobal simulations of ice nucleation and ice supersaturation with an improved cloud scheme

  16. Assimilation of Ice Concentration in an IceOcean Model R. W. LINDSAY AND J. ZHANG

    E-Print Network [OSTI]

    Zhang, Jinlun

    are now available to determine the ice drift velocity. In addition, the drift of the pack ice can CoAssimilation of Ice Concentration in an Ice­Ocean Model R. W. LINDSAY AND J. ZHANG Polar Science October 2004, in final form 27 June 2005) ABSTRACT Ice concentration is a critical parameter of the polar

  17. Sea-ice thickness measurement based on the dispersion of ice swell

    E-Print Network [OSTI]

    -year pack ice, although other char- acteristics (Young's modulus, shear modulus, and Poisson coefficientSea-ice thickness measurement based on the dispersion of ice swell David Marsana) ISTerre, CNRS propagating in the Arctic sea ice cover is exploited in order to locally measure the ice thickness

  18. Impact of underwater-ice evolution on Arctic summer sea ice

    E-Print Network [OSTI]

    Worster, M. Grae

    Impact of underwater-ice evolution on Arctic summer sea ice Dirk Notz,1,4 Miles G. McPhee,2 M. Grae the simultaneous growth and ablation of a layer of ice between an under-ice melt pond and the underlying ocean. Such ``false bottoms'' are the only significant source of ice formation in the Arctic during summer. Analytical

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

    E-Print Network [OSTI]

    Stillman, David E.

    MR22A-05 Electrical properties of saline ices and ice-silicate mixtures: geophysical) electrical-properties measurements of laboratory- produced saline ice, salt hydrates, and ice-silicate cutoff. In ice-silicate mixtures, brine channels are evident above the eutectic temperature only when

  20. 2011-12 PROSPECTUS2011-12 PROSPECTUS WESLEYAN MEN'S ICE HOCKEYWESLEYAN MEN'S ICE HOCKEY

    E-Print Network [OSTI]

    Devoto, Stephen H.

    - ponents in its inaugural season. Former bench boss Dave Snyder, in whose honor the Wesleyan ice rink2011-12 PROSPECTUS2011-12 PROSPECTUS WESLEYAN MEN'S ICE HOCKEYWESLEYAN MEN'S ICE HOCKEY #12....................................Chris Potter/Jeff Gilarde Men's Ice Hockey..............Chris Potter Women's Ice Hockey.........Jodi Mc

  1. Standard imsets for undirected and chain graphical models

    E-Print Network [OSTI]

    Kashimura, Takuya

    2011-01-01T23:59:59.000Z

    We derive standard imsets for undirected graphical models and chain graphical models. Standard imsets for undirected graphical models are described in terms of minimal triangulations for maximal prime subgraphs of the undirected graphs. For describing standard imsets for chain graphical models, we first define a triangulation of a chain graph. We then use the triangulation to generalize our results for the undirected graphs to chain graphs.

  2. Mathematics of Sea Ice K. M. Golden

    E-Print Network [OSTI]

    Golden, Kenneth M.

    , the sharp decline of the summer Arc- tic sea ice pack is probably the most dramatic. For example, the area and 1990's. While global climate models generally predict de- clines in the polar sea ice packs over the 21, such as the growth and decay of seasonal ice, the evolu- tion of ice pack reflectance, and biomass build

  3. 4, 709732, 2007 Ice-shelf ocean

    E-Print Network [OSTI]

    Boyer, Edmond

    OSD 4, 709­732, 2007 Ice-shelf ­ ocean interactions at Fimbul Ice Shelf M. R. Price Title Page published in Ocean Science Discussions are under open-access review for the journal Ocean Science Ice-shelf ­ ocean interactions at Fimbul Ice Shelf, Antarctica from oxygen isotope ratio measurements M. R. Price 1

  4. Climate Change and Variability Lake Ice, Fishes

    E-Print Network [OSTI]

    Sheridan, Jennifer

    #12;Climate Change and Variability Lake Ice, Fishes and Water Levels John J. Magnuson Center to everything else." #12;The Invisible Present The Invisible Place Magnuson 2006 #12;Ice-on Day 2007 Peter W. Schmitz Photo Local Lake Mendota #12;Ice Breakup 2010 Lake Mendota March 20 #12;March 21 Ice Breakup 2010

  5. Graphics Hardware (2005) M. Meissner, B.-O. Schneider (Editors)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Graphics Hardware (2005) M. Meissner, B.- O. Schneider (Editors) Generic Mesh Refinement on GPU recent publications have shown that a large variety of computation involved in computer graphics can reason for this, is that vertex shaders available on current graphics hardware do not allow

  6. Module name: Computer Graphics and Interaction Abbreviation: MIN-CGI

    E-Print Network [OSTI]

    Ahlers, Volker - Fakultät IV

    Module name: Computer Graphics and Interaction Abbreviation: MIN-CGI Study Semester: 1 st Semester, module in specialization Computer Graphics Teaching methods/SWS: 2 SWS lecture, 2 SWS exercise Work acc. to exam regulations: None Recommended prerequisites: Introductory computer graphics lecture

  7. Industry-Sponsored Design Projects for Freshmen Engineering Graphics Students

    E-Print Network [OSTI]

    Ben-Yakar, Adela

    Industry-Sponsored Design Projects for Freshmen Engineering Graphics Students Ronald E. Barr "Engineering Design and Graphics" course is an integral part of curriculum reform efforts throughout in implementing these PROCEED objectives in the freshman graphics course using a Robotic Blade Assembly supplied

  8. Laterotactile Rendering of Vector Graphics with the Stroke Pattern

    E-Print Network [OSTI]

    Hayward, Vincent

    Laterotactile Rendering of Vector Graphics with the Stroke Pattern Vincent Lévesque1 and Vincent are used extensively in the design of tactile graphics for persons with visual impairments. A tactile is demonstrated with the rendering of lines, circles and polygons, and is extensible to other vector graphics

  9. Packages in the `graphics' bundle D. P. Carlisle

    E-Print Network [OSTI]

    Packages in the `graphics' bundle D. P. Carlisle 1999/01/13 Contents 1 Introduction 2 2 Driver . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 The Graphics packages 7 4.1 Package Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.4 Including Graphics Files . . . . . . . . . . . . . . . . . . . . . . . 9 4.5 Other commands

  10. Tradeoffs in information graphics1 Andrew Gelman2

    E-Print Network [OSTI]

    Gelman, Andrew

    1 Tradeoffs in information graphics1 Andrew Gelman2 and Antony Unwin3 27 Oct 2012 The visual statisticians, biologists, graphic designers, and journalists (to list just a few of the important creators of data graphics) often overlap--but not completely. One of our aims in writing our article

  11. General calculations using graphics hardware, with application to interactive caustics

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    General calculations using graphics hardware, with application to interactive caustics Chris Trendall and A. James Stewart iMAGIS­GRAVIR/IMAG and University of Toronto Abstract. Graphics hardware has general computation. This paper shows that graphics hardware can perform general calculations, which

  12. Exploiting Cognitive Psychology Research for Recognizing Intention in Information Graphics

    E-Print Network [OSTI]

    Carberry, Sandra

    Exploiting Cognitive Psychology Research for Recognizing Intention in Information Graphics, recognizing the intended message of an information graphic, focusing on how results from re- search for individuals with sight-impairments to access the content of informa- tion graphics. Introduction Information

  13. Extending Plan Inference Techniques to Recognize Intentions in Information Graphics

    E-Print Network [OSTI]

    Carberry, Sandra

    Extending Plan Inference Techniques to Recognize Intentions in Information Graphics Stephanie Elzer information graphics. Our work is part of a larger project to de- velop an interactive natural language system graphics. 1 Introduction The amount of information available electronically has increased dramatically over

  14. Graphical User Interface Energy Characterization for Handheld Computers

    E-Print Network [OSTI]

    Zhong, Lin

    Graphical User Interface Energy Characterization for Handheld Computers Lin Zhong and Niraj K. Jha, Low power Keywords Energy characterization, Graphical user interface, Handheld computers, Low power to its graphical user interface (GUI). Moreover, GUIs are direct users of the dis- play and also

  15. Kinetics of Conversion of Air Bubbles to Air-Hydrate Crystals in Antarctic Ice

    E-Print Network [OSTI]

    P. B. Price

    1995-01-23T23:59:59.000Z

    The depth-dependence of bubble concentration at pressures above the transition to the air hydrate phase and the optical scattering length due to bubbles in deep ice at the South Pole are modeled using diffusion-growth data from the laboratory, taking into account the dependence of age and temperature on depth in the ice. The model fits the available data on bubbles in cores from Vostok and Byrd and on scattering length in deep ice at the South Pole. It explains why bubbles and air hydrate crystals co-exist in deep ice over a range of depths as great as 800 m and predicts that at depths below $\\rm \\sim$ 1400 m the AMANDA neutrino observatory at the South Pole will operate unimpaired by light scattering from bubbles.

  16. Incorporating Perceptual Task Effort into the Recognition of Intention in Information Graphics

    E-Print Network [OSTI]

    Carberry, Sandra

    Incorporating Perceptual Task Effort into the Recognition of Intention in Information Graphics. The rapidly increasing availability of electronic publications containing information graphics poses some graphic. Similarly, digital libraries must take into account the content of information graphics when

  17. Indirect ultraviolet photodesorption from CO:N2 binary ices - an efficient grain-gas process

    E-Print Network [OSTI]

    Bertin, Mathieu; Romanzin, Claire; Poderoso, Hugo A M; Michaut, Xavier; Philippe, Laurent; Jeseck, Pascal; Öberg, Karin I; Linnartz, Harold; Fillion, Jean-Hugues

    2013-01-01T23:59:59.000Z

    UV ice photodesorption is an important non-thermal desorption pathway in many interstellar environments that has been invoked to explain observations of cold molecules in disks, clouds and cloud cores. Systematic laboratory studies of the photodesorption rates, between 7 and 14 eV, from CO:N2 binary ices, have been performed at the DESIRS vacuum UV beamline of the synchrotron facility SOLEIL. The photodesorption spectral analysis demonstrates that the photodesorption process is indirect, i.e. the desorption is induced by a photon absorption in sub-surface molecular layers, while only surface molecules are actually desorbing. The photodesorption spectra of CO and N2 in binary ices therefore depend on the absorption spectra of the dominant species in the subsurface ice layer, which implies that the photodesorption efficiency and energy dependence are dramatically different for mixed and layered ices compared to pure ices. In particular, a thin (1-2 ML) N2 ice layer on top of CO will effectively quench CO photod...

  18. CIS 277 Introduction to Computer Graphics Techniques Course Number & Title (A.1) CIS 277 Introduction to Computer Graphics Techniques

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    CIS 277 Introduction to Computer Graphics Techniques Course Number & Title (A.1) CIS 277 Introduction to Computer Graphics Techniques Credit Units (A.2) 1 CU (3 hours of lecture per week) Instructor(s)/Required Materials (A.4) Interactive Computer Graphics, by Edward Angel, 5th Edition, Addison-Wesley, 2009. Course

  19. Neglecting ice-atmosphere interactions underestimates ice sheet melt in millennial-scale deglaciation simulations

    E-Print Network [OSTI]

    Pritchard, M. S.; Bush, A. B.; Marshall, S. J.

    2008-01-01T23:59:59.000Z

    Laurentide and Innutian ice sheets during the Last Glacialclimate of the laurentide ice sheet at the LGM, J. Clim. ,1958), The flow law of ice: A discussion of the assumptions

  20. An experimental and theoretical study of the ice accretion process during artificial and natural icing conditions

    E-Print Network [OSTI]

    Kirby, Mark Samuel

    1986-01-01T23:59:59.000Z

    Real-time measurements of ice growth during artificial and natural icing conditions were conducted using an ultrasonic pulse-echo technique. This technique allows ice thickness to be measured with an accuracy of ?0.5 mm; ...

  1. Journal of Glaciology, Vol. 56, No. 199, 2010 805 Enhancement factors for grounded ice and ice shelves inferred

    E-Print Network [OSTI]

    Gagliardini, Olivier

    shelves inferred from an anisotropic ice-flow model Ying MA,1 Olivier GAGLIARDINI,1 Catherine RITZ,1 on the actual state of stress and strain rate. Within an ice sheet, grounded-ice parts and ice shelves have of ice anisotropy on the flow of grounded ice and ice shelves. For this purpose, a full

  2. Journal of Glaciology, Vol. 00, No. 000, 0000 1 Enhancement factors for grounded ice and ice shelves1

    E-Print Network [OSTI]

    Durand, Gaël

    shelves1 inferred from an anisotropic ice flow model2 Ying MA,1 Olivier GAGLIARDINI,1 Catherine RITZ,1 of stress and strain-rate. Within an ice sheet, grounded ice parts and ice shelves have com-11 pletely of ice anisotropy on the flow of grounded ice and ice shelves. To this pur-14 pose, a full

  3. Method of forming clathrate ice

    DOE Patents [OSTI]

    Hino, Toshiyuki (Tokyo, JP); Gorski, Anthony J. (Lemont, IL)

    1987-01-01T23:59:59.000Z

    A method of forming clathrate ice in a supercooled water-based liquid contained in a vessel is disclosed. Initially, an oscillator device is located in the liquid in the vessel. The oscillator device is then oscillated ultrasonically so that small crystals are formed in the liquid. These small crystals serve as seed crystals for ice formation in the liquid and thereby prevent supercooling of the liquid. Preferably, the oscillating device is controlled by a thermostat which initiates operation of the oscillator device when the temperature of the liquid is lowered to the freezing point. Thereafter, the operation of the oscillator device is terminated when ice is sensed in the liquid by an ice sensor.

  4. Method of forming calthrate ice

    DOE Patents [OSTI]

    Hino, T.; Gorski, A.J.

    1985-09-30T23:59:59.000Z

    A method of forming clathrate ice in a supercooled water-based liquid contained in a vessel is disclosed. Initially, an oscillator device is located in the liquid in the vessel. The oscillator device is then oscillated ultransonically so that small crystals are formed in the liquid. Thes small crystals serve as seed crystals for ice formation in the liquid and thereby prevent supercooling of the liquid. Preferably, the oscillating device is controlled by a thermostat which initiates operation of the oscillator device when the temperature of the liquid is lowered to the freezing point. Thereafter, the operation of the oscillator device is terminated when ice is sensed in the liquid by an ice sensor.

  5. Graphical visualization of implemented storage databases

    SciTech Connect (OSTI)

    Fischer, C.; Hamp, H.P. [Admintec GmbH, Pforzheim (Germany)

    1993-12-31T23:59:59.000Z

    The PC-program LANUC, developed from Admintec, supports a decentralized or centralized storage management of radioactive waste. It gives the storekeeper a graphical view of a storage area and its contents which are otherwise only represented in lists and databases. The storekeeper can plan any movements within the storage area and once they are confirmed, the data in the database are automatically altered. Any implemented database can be represented by simulating a human operator with a program.

  6. amorphous water ice: Topics by E-print Network

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

    artificial and natural icing conditions MIT - DSpace Summary: Real-time measurements of ice growth during artificial and natural icing conditions were conducted using an...

  7. amery ice shelf: Topics by E-print Network

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

    artificial and natural icing conditions MIT - DSpace Summary: Real-time measurements of ice growth during artificial and natural icing conditions were conducted using an...

  8. amorphous ice transition: Topics by E-print Network

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

    artificial and natural icing conditions MIT - DSpace Summary: Real-time measurements of ice growth during artificial and natural icing conditions were conducted using an...

  9. antarctica larsen ice: Topics by E-print Network

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

    artificial and natural icing conditions MIT - DSpace Summary: Real-time measurements of ice growth during artificial and natural icing conditions were conducted using an...

  10. alpine deep ice: Topics by E-print Network

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

    artificial and natural icing conditions MIT - DSpace Summary: Real-time measurements of ice growth during artificial and natural icing conditions were conducted using an...

  11. airborne ice sounding: Topics by E-print Network

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

    artificial and natural icing conditions MIT - DSpace Summary: Real-time measurements of ice growth during artificial and natural icing conditions were conducted using an...

  12. Tuning JPEG2000 Image Compression for Graphics Regions Serene Banerjee and Brian L. Evans

    E-Print Network [OSTI]

    Evans, Brian L.

    Tuning JPEG2000 Image Compression for Graphics Regions Serene Banerjee and Brian L. Evans Dept contain formatted text and graphics data. For graphics images at the same low bit rates, graphics compression methods, such as the graphics interchange format GIF and portable network graphics PNG, outperform

  13. Development of a graphical user interface and graphics display for the WIND system

    SciTech Connect (OSTI)

    O`Steen, B.L.; Fast, J.D.; Suire, B.S.

    1992-12-31T23:59:59.000Z

    An advanced graphical user interface (GUI) and improved graphics for transport calculations have been developed for the Weather Information and Display System (WINDS). Two WINDS transport codes, Area Evac and 2DPUF, have been ported from their original VAX/VMS environment to a UNIX operating system and reconfigured to take advantage of the new graphics capability. A developmental prototype of this software is now available on a UNIX based IBM 340 workstation in the Dose Assessment Center (DAC). Automatic transfer of meteorological data from the WINDS VAX computers to the IBM workstation in the DAC has been implemented. This includes both regional National Weather Service (NWS) data and SRS tower data. The above developments fulfill a FY 1993 DOE milestone.

  14. Development of a graphical user interface and graphics display for the WIND system

    SciTech Connect (OSTI)

    O'Steen, B.L.; Fast, J.D.; Suire, B.S.

    1992-01-01T23:59:59.000Z

    An advanced graphical user interface (GUI) and improved graphics for transport calculations have been developed for the Weather Information and Display System (WINDS). Two WINDS transport codes, Area Evac and 2DPUF, have been ported from their original VAX/VMS environment to a UNIX operating system and reconfigured to take advantage of the new graphics capability. A developmental prototype of this software is now available on a UNIX based IBM 340 workstation in the Dose Assessment Center (DAC). Automatic transfer of meteorological data from the WINDS VAX computers to the IBM workstation in the DAC has been implemented. This includes both regional National Weather Service (NWS) data and SRS tower data. The above developments fulfill a FY 1993 DOE milestone.

  15. Vapor deposition of water on graphitic surfaces: Formation of amorphous ice, bilayer ice, ice I, and liquid water

    SciTech Connect (OSTI)

    Lupi, Laura; Kastelowitz, Noah; Molinero, Valeria, E-mail: Valeria.Molinero@utah.edu [Department of Chemistry, The University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850 (United States)

    2014-11-14T23:59:59.000Z

    Carbonaceous surfaces are a major source of atmospheric particles and could play an important role in the formation of ice. Here we investigate through molecular simulations the stability, metastability, and molecular pathways of deposition of amorphous ice, bilayer ice, and ice I from water vapor on graphitic and atomless Lennard-Jones surfaces as a function of temperature. We find that bilayer ice is the most stable ice polymorph for small cluster sizes, nevertheless it can grow metastable well above its region of thermodynamic stability. In agreement with experiments, the simulations predict that on increasing temperature the outcome of water deposition is amorphous ice, bilayer ice, ice I, and liquid water. The deposition nucleation of bilayer ice and ice I is preceded by the formation of small liquid clusters, which have two wetting states: bilayer pancake-like (wetting) at small cluster size and droplet-like (non-wetting) at larger cluster size. The wetting state of liquid clusters determines which ice polymorph is nucleated: bilayer ice nucleates from wetting bilayer liquid clusters and ice I from non-wetting liquid clusters. The maximum temperature for nucleation of bilayer ice on flat surfaces, T{sub B}{sup max} is given by the maximum temperature for which liquid water clusters reach the equilibrium melting line of bilayer ice as wetting bilayer clusters. Increasing water-surface attraction stabilizes the pancake-like wetting state of liquid clusters leading to larger T{sub B}{sup max} for the flat non-hydrogen bonding surfaces of this study. The findings of this study should be of relevance for the understanding of ice formation by deposition mode on carbonaceous atmospheric particles, including soot.

  16. Overview on Hydrate Coring, Handling and Analysis

    SciTech Connect (OSTI)

    Jon Burger; Deepak Gupta; Patrick Jacobs; John Shillinglaw

    2003-06-30T23:59:59.000Z

    Gas hydrates are crystalline, ice-like compounds of gas and water molecules that are formed under certain thermodynamic conditions. Hydrate deposits occur naturally within ocean sediments just below the sea floor at temperatures and pressures existing below about 500 meters water depth. Gas hydrate is also stable in conjunction with the permafrost in the Arctic. Most marine gas hydrate is formed of microbially generated gas. It binds huge amounts of methane into the sediments. Worldwide, gas hydrate is estimated to hold about 1016 kg of organic carbon in the form of methane (Kvenvolden et al., 1993). Gas hydrate is one of the fossil fuel resources that is yet untapped, but may play a major role in meeting the energy challenge of this century. In June 2002, Westport Technology Center was requested by the Department of Energy (DOE) to prepare a ''Best Practices Manual on Gas Hydrate Coring, Handling and Analysis'' under Award No. DE-FC26-02NT41327. The scope of the task was specifically targeted for coring sediments with hydrates in Alaska, the Gulf of Mexico (GOM) and from the present Ocean Drilling Program (ODP) drillship. The specific subjects under this scope were defined in 3 stages as follows: Stage 1: Collect information on coring sediments with hydrates, core handling, core preservation, sample transportation, analysis of the core, and long term preservation. Stage 2: Provide copies of the first draft to a list of experts and stakeholders designated by DOE. Stage 3: Produce a second draft of the manual with benefit of input from external review for delivery. The manual provides an overview of existing information available in the published literature and reports on coring, analysis, preservation and transport of gas hydrates for laboratory analysis as of June 2003. The manual was delivered as draft version 3 to the DOE Project Manager for distribution in July 2003. This Final Report is provided for records purposes.

  17. NOAA Technical Memorandum GLERL-135 Great Lakes Ice Cover Climatology

    E-Print Network [OSTI]

    ____________________________________________________________________________ Great Lakes Ice Cover Climatology Update: Winters 2003, 2004, and 2005 Raymond A. Assel NOAA, Great..................................................................................................6 DATES OF FIRST (LAST) ICE AND ICE DURATION. .............................................................7 SEASONAL PROGRESSION OF ICE COVER

  18. Ross Ice Shelf in situ radio-frequency ice attenuation

    E-Print Network [OSTI]

    Taylor Barrella; Steven Barwick; David Saltzberg

    2012-05-01T23:59:59.000Z

    We have measured the in situ average electric field attenuation length for radio-frequency signals broadcast vertically through the Ross Ice Shelf. We chose a location, Moore Embayment, south of Minna Bluff, known for its high reflectivity at the ice-sea interface. We confirmed specular reflection and used the return pulses to measure the average attenuation length from 75-1250 MHz over the round-trip distance of 1155 m. We find the average electric field attenuation length to vary from 500 m at 75 MHz to 300 m at 1250 MHz, with an experimental uncertainty of 55 to 15 m. We discuss the implications for neutrino telescopes that use the radio technique and include the Ross Ice Shelf as part of their sensitive volume.

  19. Ice-condenser aerosol tests

    SciTech Connect (OSTI)

    Ligotke, M.W.; Eschbach, E.J.; Winegardner, W.K. (Pacific Northwest Lab., Richland, WA (United States))

    1991-09-01T23:59:59.000Z

    This report presents the results of an experimental investigation of aerosol particle transport and capture using a full-scale height and reduced-scale cross section test facility based on the design of the ice compartment of a pressurized water reactor (PWR) ice-condenser containment system. Results of 38 tests included thermal-hydraulic as well as aerosol particle data. Particle retention in the test section was greatly influenced by thermal-hydraulic and aerosol test parameters. Test-average decontamination factor (DF) ranged between 1.0 and 36 (retentions between {approximately}0 and 97.2%). The measured test-average particle retentions for tests without and with ice and steam ranged between DF = 1.0 and 2.2 and DF = 2.4 and 36, respectively. In order to apparent importance, parameters that caused particle retention in the test section in the presence of ice were steam mole fraction (SMF), noncondensible gas flow rate (residence time), particle solubility, and inlet particle size. Ice-basket section noncondensible flows greater than 0.1 m{sup 3}/s resulted in stable thermal stratification whereas flows less than 0.1 m{sup 3}/s resulted in thermal behavior termed meandering with frequent temperature crossovers between flow channels. 10 refs., 66 figs., 16 tabs.

  20. Harvesting graphics power for MD simulations

    E-Print Network [OSTI]

    J. A. van Meel; A. Arnold; D. Frenkel; S. F. Portegies Zwart; R. G. Belleman

    2007-09-20T23:59:59.000Z

    We discuss an implementation of molecular dynamics (MD) simulations on a graphic processing unit (GPU) in the NVIDIA CUDA language. We tested our code on a modern GPU, the NVIDIA GeForce 8800 GTX. Results for two MD algorithms suitable for short-ranged and long-ranged interactions, and a congruential shift random number generator are presented. The performance of the GPU's is compared to their main processor counterpart. We achieve speedups of up to 80, 40 and 150 fold, respectively. With newest generation of GPU's one can run standard MD simulations at 10^7 flops/$.

  1. Monte Carlo simulations on Graphics Processing Units

    E-Print Network [OSTI]

    Vadim Demchik; Alexei Strelchenko

    2009-03-30T23:59:59.000Z

    Implementation of basic local Monte-Carlo algorithms on ATI Graphics Processing Units (GPU) is investigated. The Ising model and pure SU(2) gluodynamics simulations are realized with the Compute Abstraction Layer (CAL) of ATI Stream environment using the Metropolis and the heat-bath algorithms, respectively. We present an analysis of both CAL programming model and the efficiency of the corresponding simulation algorithms on GPU. In particular, the significant performance speed-up of these algorithms in comparison with serial execution is observed.

  2. Core Drilling Demonstration

    Broader source: Energy.gov [DOE]

    Tank Farms workers demonstrate core drilling capabilities for Hanford single-shell tanks. Core drilling is used to determine the current condition of each tank to assist in the overall assessment...

  3. Security Policy Specification Using a Graphical Approach Page 1 Security Policy Specification Using a Graphical

    E-Print Network [OSTI]

    California at Davis, University of

    Security Policy Specification Using a Graphical Approach Page 1 Security Policy Specification Using of California, Davis {hoagland,pandey,levitt}@cs.ucdavis.edu Technical Report CSE-98-3 A security policy states for organizations to declare their security policies, even informal state- ments would be better than the current

  4. Heavy ion irradiation of crystalline water ice

    E-Print Network [OSTI]

    Dartois, E; Boduch, P; Brunetto, R; Chabot, M; Domaracka, A; Ding, J J; Kamalou, O; Lv, X Y; Rothard, H; da Silveira, E F; Thomas, J C

    2015-01-01T23:59:59.000Z

    Under cosmic irradiation, the interstellar water ice mantles evolve towards a compact amorphous state. Crystalline ice amorphisation was previously monitored mainly in the keV to hundreds of keV ion energies. We experimentally investigate heavy ion irradiation amorphisation of crystalline ice, at high energies closer to true cosmic rays, and explore the water-ice sputtering yield. We irradiated thin crystalline ice films with MeV to GeV swift ion beams, produced at the GANIL accelerator. The ice infrared spectral evolution as a function of fluence is monitored with in-situ infrared spectroscopy (induced amorphisation of the initial crystalline state into a compact amorphous phase). The crystalline ice amorphisation cross-section is measured in the high electronic stopping-power range for different temperatures. At large fluence, the ice sputtering is measured on the infrared spectra, and the fitted sputtering-yield dependence, combined with previous measurements, is quadratic over three decades of electronic ...

  5. Thermal Storage with Ice Harvesting Systems

    E-Print Network [OSTI]

    Knebel, D. E.

    1986-01-01T23:59:59.000Z

    Application of Harvesting Ice Storage Systems. Thermal storage systems are becoming widely accepted techniques for utility load management. This paper discusses the principles of ice harvesting equipment and their application to the multi...

  6. Quantum Ice : a quantum Monte Carlo study

    E-Print Network [OSTI]

    Nic Shannon; Olga Sikora; Frank Pollmann; Karlo Penc; Peter Fulde

    2011-12-13T23:59:59.000Z

    Ice states, in which frustrated interactions lead to a macroscopic ground-state degeneracy, occur in water ice, in problems of frustrated charge order on the pyrochlore lattice, and in the family of rare-earth magnets collectively known as spin ice. Of particular interest at the moment are "quantum spin ice" materials, where large quantum fluctuations may permit tunnelling between a macroscopic number of different classical ground states. Here we use zero-temperature quantum Monte Carlo simulations to show how such tunnelling can lift the degeneracy of a spin or charge ice, stabilising a unique "quantum ice" ground state --- a quantum liquid with excitations described by the Maxwell action of 3+1-dimensional quantum electrodynamics. We further identify a competing ordered "squiggle" state, and show how both squiggle and quantum ice states might be distinguished in neutron scattering experiments on a spin ice material.

  7. Rubber friction on ice and snow surfaces 

    E-Print Network [OSTI]

    Skouvaklis, Gerasimos

    2011-06-28T23:59:59.000Z

    The friction of rubber on ice and snow surfaces is complex. Deeper scientific understanding is important for optimising performance of tyres in winter. Rubber, ice and snow systems exhibit frictional behaviour which ...

  8. Developing Great Lakes Ice Model (GLIM) using CIOM (Coupled Ice-Ocean Model) in Lake Erie

    E-Print Network [OSTI]

    Developing Great Lakes Ice Model (GLIM) using CIOM (Coupled Ice- Ocean Model) in Lake Erie Primary of the ice-ocean models, assistance with development of project reports and scientific presentations will first start the implementation of the CIOM in Lake Erie, assemble satellite observations of ice cover

  9. Ice Stream C slowdown is not stabilizing West Antarctic Ice Sheet S Anandakrishnan RB Alleyy

    E-Print Network [OSTI]

    Jacobel, Robert W.

    Ice Stream C slowdown is not stabilizing West Antarctic Ice Sheet S Anandakrishnan RB Alleyy RW Jacobelz H Conwayx March 24, 1999 Abstract Changes in the flow of ice stream C likely indicate a continuing part of ice stream C, West Antarctica largely stagnated over the last few centuries, while upglacier

  10. Quenched by ice: Transient grating measurements of vibronic dynamics in bromine-doped ice

    E-Print Network [OSTI]

    Apkarian, V. Ara

    Quenched by ice: Transient grating measurements of vibronic dynamics in bromine-doped ice I. U April 2006; published online 25 May 2006 In both water and in ice, the absorption spectra of bromine of the trapped molecule in its electronic B 3 0u state in ice. Independent of the initial excitation energy

  11. New study details glacier ice loss following ice shelf July 25, 2011

    E-Print Network [OSTI]

    Cambridge, University of

    of several ice shelves in Antarctica led to acceleration of the glaciers that feed into them. CombiningNew study details glacier ice loss following ice shelf collapse July 25, 2011 Contact: Anthony Lane further demonstrates how important ice shelves are to Antarctic glaciers.' Shuman is lead author

  12. 115GLACIERS AND ICE CAPSCHAPTER 6B Glaciers and Ice Caps

    E-Print Network [OSTI]

    Fountain, Andrew G.

    115GLACIERS AND ICE CAPSCHAPTER 6B 6B Glaciers and Ice Caps Michael Zemp (lead author, Department of Sciences, China) #12;116 GLOBAL OUTLOOK FOR ICE AND SNOW Summary Glaciers and ice caps are among the most hazards. Because they are close to the melting point and react strongly to climate change, glaciers

  13. Development of a real time graphical display for an FMS

    E-Print Network [OSTI]

    Jones, Thomas Hal

    1985-01-01T23:59:59.000Z

    . To develop test criteria and evaluate the performance of the graphics package against the criteria. 5. To present the design process and final product in written form for future users of the graphics package. 1. 5 Organization of this Paper The design... process for the graphics package wi 1 1 use the System Development Methodology (SDM) developed by the Air Force ICAM office [6]. This technique breaks the design and development process into the following categories or phases: Needs Analysis Solution...

  14. INTERACTIVE COMPUTER GRAPHICS DISPLAYS FOR HIERARCHICAL DATA STRUCTURES

    E-Print Network [OSTI]

    Cahn, D.F.

    2010-01-01T23:59:59.000Z

    Pittsburgh, 1980 LBL-10247 INTERACTIVE COMPUTER GRAPHICSOF THIS DKiir.KHT IS UMLIMITEO INTERACTIVE COMPUTER GRAPHICSBerkeley, CA 94720 An interactive computer graphical display

  15. alternative graphical displays: Topics by E-print Network

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

    Graphical User Interfaces on OLED Displays CiteSeer Summary: Emerging organic light-emitting diode (OLED)-based displays obviate external lighting; and consume drastically...

  16. Accelerating the Fourier split operator method via graphics processing units

    E-Print Network [OSTI]

    Heiko Bauke; Christoph H. Keitel

    2010-12-17T23:59:59.000Z

    Current generations of graphics processing units have turned into highly parallel devices with general computing capabilities. Thus, graphics processing units may be utilized, for example, to solve time dependent partial differential equations by the Fourier split operator method. In this contribution, we demonstrate that graphics processing units are capable to calculate fast Fourier transforms much more efficiently than traditional central processing units. Thus, graphics processing units render efficient implementations of the Fourier split operator method possible. Performance gains of more than an order of magnitude as compared to implementations for traditional central processing units are reached in the solution of the time dependent Schr\\"odinger equation and the time dependent Dirac equation.

  17. T-532: Vulnerability in Graphics Rendering Engine Could Allow...

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

    to the location in Windows Explorer. When the user navigates to the share, the affected control path is triggered via the Graphics Rendering Engine. The specially crafted...

  18. Ice Cream in a Bag Ingredients

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    Ice Cream in a Bag Ingredients: 1 tablespoon sugar 1/4 teaspoon vanilla extract 2 tablespoons soft fruit 1/2 cup skim milk For the freezer bag; not to be eaten: 1/3 cup rock salt Ice cubes Directions 1. Open a gallon size plastic bag. Add rock salt and fill half way up with ice. Shake to mix the salt

  19. 3, 9991020, 2007 Summer sea ice

    E-Print Network [OSTI]

    Boyer, Edmond

    CPD 3, 999­1020, 2007 Summer sea ice during the early Holocene H. Goosse et al. Title Page Abstract on the early Holocene climate constrains the summer sea ice projections for the 21st century H. Goosse, E #12;CPD 3, 999­1020, 2007 Summer sea ice during the early Holocene H. Goosse et al. Title Page

  20. 2, 879921, 2006 Ice-sheet evolution

    E-Print Network [OSTI]

    Boyer, Edmond

    CPD 2, 879­921, 2006 Ice-sheet evolution during the last climatic cycle S. Charbit et al. Title reconstructions of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle S. Charbit1 , C­921, 2006 Ice-sheet evolution during the last climatic cycle S. Charbit et al. Title Page Abstract

  1. Surface Impedance Tomography for Antarctic Sea Ice

    E-Print Network [OSTI]

    Golden, Kenneth M.

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

  2. 8, 87438771, 2008 Inhibition of ice

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ACPD 8, 8743­8771, 2008 Inhibition of ice crystallisation B. J. Murray Title Page Abstract Chemistry and Physics Discussions Inhibition of ice crystallisation in highly viscous aqueous organic acid­8771, 2008 Inhibition of ice crystallisation B. J. Murray Title Page Abstract Introduction Conclusions

  3. 5, 37233745, 2005 characteristics of ice

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ACPD 5, 3723­3745, 2005 Chemical characteristics of ice nuclei in anvil cirrus clouds C. H. Twohy and Physics Discussions Chemical characteristics of ice residual nuclei in anvil cirrus clouds: evidence for homogeneous and heterogeneous ice formation C. H. Twohy 1 and M. R. Poellot 2 1 College of Oceanic

  4. The convective desalination of sea ice

    E-Print Network [OSTI]

    Rees Jones, David

    2014-07-01T23:59:59.000Z

    containing both liquid brine and solid (pure water) ice. Frad is the flux of penetrating solar radiation. Thus the thermal properties of sea ice are composed of those of the solid and liquid phases that make up sea ice. Fixed-salinity models used in older...

  5. IceCube Project Monthly Report Accomplishments

    E-Print Network [OSTI]

    Saffman, Mark

    staff from UW, IceCube collaborators, and Raytheon. · Conducted a Quarterly Status Meeting at UW-loaded schedule for on-ice activities that is coordinated with the Raytheon on-ice schedules. Construction Cost accurate application of escalation rates and revisions to actual cost data. Raytheon earned value data

  6. Microwave emissivity of fresh water ice--Lake ice and Antarctic ice pack--Radiative transfer simulations versus satellite radiances

    E-Print Network [OSTI]

    Mills, Peter

    2012-01-01T23:59:59.000Z

    Microwave emissivity models of sea ice are poorly validated empirically. Typical validation studies involve using averaged or stereotyped profiles of ice parameters against averaged radiance measurements. Measurement sites are rarely matched and even less often point-by-point. Because of saline content, complex permittivity of sea ice is highly variable and difficult to predict. Therefore, to check the validity of a typical, plane-parallel, radiative-transfer-based ice emissivity model, we apply it to fresh water ice instead of salt-water ice. Radiance simulations for lake ice are compared with measurements over Lake Superior from the Advanced Microwave Scanning Radiometer on EOS (AMSR-E). AMSR-E measurements are also collected over Antarctic icepack. For each pixel, a thermodynamic model is driven by four years of European Center for Medium Range Weather Forecasts (ECMWF) reanalysis data and the resulting temperature profiles used to drive the emissivity model. The results suggest that the relatively simple ...

  7. Medical ice slurry production device

    DOE Patents [OSTI]

    Kasza, Kenneth E. (Palos Park, IL); Oras, John (Des Plaines, IL); Son, HyunJin (Naperville, IL)

    2008-06-24T23:59:59.000Z

    The present invention relates to an apparatus for producing sterile ice slurries for medical cooling applications. The apparatus is capable of producing highly loaded slurries suitable for delivery to targeted internal organs of a patient, such as the brain, heart, lungs, stomach, kidneys, pancreas, and others, through medical size diameter tubing. The ice slurry production apparatus includes a slurry production reservoir adapted to contain a volume of a saline solution. A flexible membrane crystallization surface is provided within the slurry production reservoir. The crystallization surface is chilled to a temperature below a freezing point of the saline solution within the reservoir such that ice particles form on the crystallization surface. A deflector in the form of a reciprocating member is provided for periodically distorting the crystallization surface and dislodging the ice particles which form on the crystallization surface. Using reservoir mixing the slurry is conditioned for easy pumping directly out of the production reservoir via medical tubing or delivery through other means such as squeeze bottles, squeeze bags, hypodermic syringes, manual hand delivery, and the like.

  8. CSC6870 Computer Graphics II B-Spline Curves and NURBS

    E-Print Network [OSTI]

    Hua, Jing

    CSC6870 Computer Graphics II B-Spline Curves and NURBS CSC6870 Computer Graphics II Motivation continuity CSC6870 Computer Graphics II B-spline Curve CSC6870 Computer Graphics II B-Splines · Curve CSC6870 Computer Graphics II B-Splines Basis Functions: Cox- deBoor recursion · The basis function

  9. Graphical Quantum Error-Correcting Codes

    E-Print Network [OSTI]

    Sixia Yu; Qing Chen; C. H. Oh

    2007-09-12T23:59:59.000Z

    We introduce a purely graph-theoretical object, namely the coding clique, to construct quantum errorcorrecting codes. Almost all quantum codes constructed so far are stabilizer (additive) codes and the construction of nonadditive codes, which are potentially more efficient, is not as well understood as that of stabilizer codes. Our graphical approach provides a unified and classical way to construct both stabilizer and nonadditive codes. In particular we have explicitly constructed the optimal ((10,24,3)) code and a family of 1-error detecting nonadditive codes with the highest encoding rate so far. In the case of stabilizer codes a thorough search becomes tangible and we have classified all the extremal stabilizer codes up to 8 qubits.

  10. Partial Wave Analysis using Graphics Cards

    E-Print Network [OSTI]

    Niklaus Berger

    2011-08-30T23:59:59.000Z

    Partial wave analysis is a key technique in hadron spectroscopy. The use of unbinned likelihood fits on large statistics data samples and ever more complex physics models makes this analysis technique computationally very expensive. Parallel computing techniques, in particular the use of graphics processing units, are a powerful means to speed up analyses; in the contexts of the BES III, Compass and GlueX experiments, parallel analysis frameworks have been created. They provide both fits that are faster by more than two orders of magnitude than legacy code and environments to quickly program and run an analysis. This in turn allows the physicists to focus on the many difficult open problems pertaining to partial wave analysis.

  11. Detecting extra-galactic supernova neutrinos in the Antarctic ice

    E-Print Network [OSTI]

    Sebastian Böser; Marek Kowalski; Lukas Schulte; Nora Linn Strotjohann; Markus Voge

    2014-07-28T23:59:59.000Z

    Building on the technological success of the IceCube neutrino telescope, we outline a prospective low-energy extension that utilizes the clear ice of the South Pole. Aiming at a 10 Mton effective volume and a 10 MeV threshold, the detector would provide sufficient sensitivity to detect neutrino bursts from core-collapse supernovae (SNe) in nearby galaxies. The detector geometry and required density of instrumentation are discussed along with the requirements to control the various sources of background, such as solar neutrinos. In particular, the suppression of spallation events induced by atmospheric muons poses a challenge that will need to be addressed. Assuming this background can be controlled, we find that the resulting detector will be able to detect SNe from beyond 10 Mpc, delivering between 10 and 41 regular core-collapse SN detections per decade. It would further allow to study more speculative phenomena, such as optically dark (failed) SNe, where the collapse proceeds directly to a black hole, at a detection rate similar to that of regular SNe. We find that the biggest technological challenge lies in the required number of large area photo-sensors, with simultaneous strict limits on the allowed noise rates. If both can be realized, the detector concept we present will reach the required sensitivity with a comparatively small construction effort and hence offers a route to future routine observations of SNe with neutrinos.

  12. Foundations of Computer Graphics Online Lecture 1: Overview and History

    E-Print Network [OSTI]

    California at Berkeley, University of

    Life) § Electronic publishing § Online gaming § 3D printers and fabrication Why Study 3D Computer study 3D Graphics? Ravi Ramamoorthi http://www.cs.berkeley.edu/~ravir Instructor Ravi Ramamoorthi http: Write complex 3D graphics programs (real-time scene viewer in OpenGL, offline raytracer) § Theory

  13. Vision, Video, and Graphics (2003) P. Hall, P. Willis (Editors)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . Boyer2 1 Artis GRAVIR/IMAG, a joint project of CNRS, INPG, INRIA, UJF. 2 MOVI GRAVIR/IMAG, a joint to capture an actor with no intrusive trackers and without any special environment like blue set, how.3 [Computer Graphics]: Picture/Image Generation ­ Bitmap and framebuffer operations I.3.7 [Computer Graphics

  14. Implementation of graphical layout editor for geologic applications

    SciTech Connect (OSTI)

    Copper, D.H.; Heil, R.J.

    1984-04-01T23:59:59.000Z

    The increasing availability and sophistication of data processing technology have given geologists new insights into the interpretation and evaluation of geological data. In many instances, however, software and hardware limitations have prevented geologists from effectively combining the graphical results from many of these specialized packaged procedures. At Aramco, the emphasis has been toward providing geologists and geological technicians with a convenient, user-friendly approach to effectively margin the graphical results of the various software packages. Initially designed for an IBM graphics workstation, the graphics layout editor (GLE) offers the user a method of quickly merging or compositing the graphical results of the most frequently used geological software packages in a menu-driven, interactive environment. Applications of GLE technology not only allow the user to produce expanded or enhanced variations on the original graphical output, it also gives geologists the flexibility to conveniently experiment with combinations of graphical results which would otherwise be cost prohibitive owing to drafting complexities. To support final design and presentation, GLE in an interactive mode also provides high-quality text capability, allowing the cartographer to quickly build and annotate presentation quality composites. GLE techniques of graphical overlay, insertion, and interactive editing provide geologists with an infinite series of perspectives into geologic problem solving.

  15. Using Graphical Representations to Support the Calculation of Infusion Parameters

    E-Print Network [OSTI]

    Subramanian, Sriram

    Using Graphical Representations to Support the Calculation of Infusion Parameters Sandy J. J. Gould in which participants were asked to solve a num- ber of infusion parameter problems that were represented representations transfer to actual workplace settings. Keywords: Graphical reasoning, infusion pumps, re

  16. PLOT2K: a graphics interface to System 2000

    SciTech Connect (OSTI)

    Creel, L.

    1981-01-01T23:59:59.000Z

    PLOT2K is an interactive graphics interface to the System 2000 data base management system. It runs on a CDC 6600 computer with an NOS or NOS/BE operating system. The graphics package used is DISSPLA. PLOT2K will generate bar chart histograms, pie charts, or x-y point plots and will access any System 2000 data base.

  17. Concrete Browsing Of A Graphical Toolkit Library Denys Duchier

    E-Print Network [OSTI]

    Duchier, Denys

    Concrete Browsing Of A Graphical Toolkit Library Denys Duchier Department of Computer Science and promote reuse. This paper introduces Concrete Browsing as an improved method of consult- ing a graphical library, and Spreading Computation as novel paradigm for search and retrieval. A concrete browser allows

  18. Concrete Browsing Of A Graphical Toolkit Library Denys Duchier

    E-Print Network [OSTI]

    Duchier, Denys

    Concrete Browsing Of A Graphical Toolkit Library Denys Duchier Department of Computer Science and promote reuse. This paper introduces Concrete Browsing as an improved method of consult­ ing a graphical library, and Spreading Computation as novel paradigm for search and retrieval. A concrete browser allows

  19. Computer Graphics in Textiles and Apparel Particle-Syst

    E-Print Network [OSTI]

    Frey, Pascal

    Computer Graphics in Textiles and Apparel Particle-Syst ode1for CI raping orcenturies people have measurements like the Kawabata evaluation system.' In computer graphics,Weil` came upwithanapproachin 1986-specificproperties,suchashys- teresis of the forces, as well as measured experimental data. Moreover,flexibilityin the energy functions

  20. Graphics Hardware (2006) M. Olano, P. Slusallek (Editors)

    E-Print Network [OSTI]

    Skadron, Kevin

    Graphics Hardware (2006) M. Olano, P. Slusallek (Editors) The Visual Vulnerability Spectrum: Characterizing Architectural Vulnerability for Graphics Hardware Jeremy W. Sheaffer1 David P. Luebke2 Kevin of transient faults in semiconductors shifts away from high- energy cosmic particle strikes and toward more

  1. WELL-FORMEDNESS, CONSISTENCY AND COMPLETENESS OF GRAPHIC MODELS

    E-Print Network [OSTI]

    Zhu, Hong

    WELL-FORMEDNESS, CONSISTENCY AND COMPLETENESS OF GRAPHIC MODELS HONG ZHU Department of Computing@yahoo.com ABSTRACT This paper clarifies the notions of well-formedness, consistency and completeness of graphic languages, Well-formedness, Consistency constraints, Completeness constraints, Type systems, Formal

  2. Computer Graphic Tools for Automotive Paint Engineering Gary W. Meyer

    E-Print Network [OSTI]

    Minnesota, University of

    Computer Graphic Tools for Automotive Paint Engineering Gary W. Meyer University of Minnesota graphics programs that can be used to solve automotive paint engineering problems. New surface reflection models have been created for simulating the appearance of automotive paint, and the hardware available

  3. How ISO-Standards Affect Graphic-Arts Work

    E-Print Network [OSTI]

    Zanibbi, Richard

    How ISO-Standards Affect Graphic-Arts Work Andreas Kraushaar Head, Prepress Division Fogra Munich, Germany 4pm, Wed., Jan. 10, 2007 Auditorium of the Center for Imaging Science ISO TC 130 (graphic. Important standards with respect to the printing industry such as the ISO 2846 and ISO 12647-X

  4. Modeling Interfacial Liquid Layers in Environmental Ices SUPPLEMENTARY MATERIAL

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    Symbol Quantity ice wf Fugacity of pure ice brine wf^ Fugacity of water in brine layer vap wf Fugacity of water in vapor space above ice wf Fugacity of pure liquid water wx Mole fraction of water in brine layer ice wH Enthalpy of ice at T, P 0,ice wH Enthalpy of ice at reference state brine wH Partial molar

  5. A complete graphical calculus for Spekkens' toy bit theory

    E-Print Network [OSTI]

    Miriam Backens; Ali Nabi Duman

    2014-11-06T23:59:59.000Z

    Spekkens' toy bit theory is a hidden variable theory which nevertheless reproduces significant parts of operational quantum mechanics. Here, we show that a graphical calculus induced from monoidal categories is complete for Spekkens' toy bit theory, i.e. any equality that can be derived in the toy bit theory can also be derived graphically. We do this by adapting a completeness proof for a similar graphical calculus for stabilizer quantum mechanics to the toy theory. In the process, we prove that graph states play a central role in Spekkens' toy bit theory, just as they do in stabilizer quantum mechanics. Furthermore, we show that the rewriting strategies used in the graphical calculus for stabilizer quantum mechanics work in the toy theory graphical calculus.

  6. Computer Vision, Graphics, and Image Processing 40 (1987) 250-266 1 Computer Vision, Graphics, and Image Processing 40 (1987) 250-266 2

    E-Print Network [OSTI]

    Murray, David

    Computer Vision, Graphics, and Image Processing 40 (1987) 250-266 1 #12;Computer Vision, Graphics, and Image Processing 40 (1987) 250-266 2 #12;Computer Vision, Graphics, and Image Processing 40 (1987) 250-266 3 #12;Computer Vision, Graphics, and Image Processing 40 (1987) 250-266 4 #12;Computer Vision

  7. University of BonnUniversity of Bonn Computer Graphics GroupComputer Graphics Group BTF Acquisition & RenderingBTF Acquisition & RenderingBTF Acquisition & Rendering

    E-Print Network [OSTI]

    Eckmiller, Rolf

    University of BonnUniversity of Bonn Computer Graphics GroupComputer Graphics Group BTF AcquisitionRalf Sarlette Mirko SattlerMirko Sattler University of BonnUniversity of Bonn Computer Graphics GroupComputer Graphics Group How to Illuminate cloth?HowHow toto Illuminate clothIlluminate cloth?? People recognize

  8. Detection and Extraction of Text Connected to Graphics in Maps The separation of text from graphics has been challenging researchers for many years. The

    E-Print Network [OSTI]

    Tan, Chew Lim

    Detection and Extraction of Text Connected to Graphics in Maps Abstract The separation of text from graphics has been challenging researchers for many years. The difficulty arises when there is text connected to graphics. This paper proposes a specific method of detecting and extracting graphics

  9. Quantitative molecular graphics what is it? -use of molecular graphics at quantitative level employing high-quality pictures of molecules in various views (orthographic

    E-Print Network [OSTI]

    Ferreira, Márcia M. C.

    Quantitative molecular graphics ­ what is it? -use of molecular graphics at quantitative level by using quantitative molecular graphics (34) and a priori QSAR (54- 60).2 A STUDY OF HIV-1 PROTEASE-INHIBITOR INTERMOLECULAR INTERACTIONS BY USING QUANTITATIVE MOLECULAR GRAPHICS AND A PRIORI QSAR Rudolf Kiralj and Márcia M

  10. Master of Science and Engineering inMaster of Science and Engineering in Computer Graphics and GameComputer Graphics and Game

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    Master of Science and Engineering inMaster of Science and Engineering in Computer Graphics and GameComputer Graphics and Game Technology (CGGT)Technology (CGGT) Stephen H. Lane, DirectorStephen H. Lane, Director #12Science or Engineering ­­ Passion for graphics and animation fromPassion for graphics and animation from both a creative

  11. Min-wuk Lee 1 A fixedA fixed--point 3D graphics library withpoint 3D graphics library with

    E-Print Network [OSTI]

    Yoo, Hoi-Jun

    Outline Introduction Motivation MobileGL: Mobile 3D graphics library Energy-efficient CPU cache Energy-optimization for mobile 3D graphics Software system : High speed graphics library (MobileGL) Hardware system : Energy-cost target High speed graphics library Energy-efficient CPU cache system High quality target High speed

  12. Glacial ice composition: A potential long-term record of the chemistry of atmospheric deposition, Wind River Range, Wyoming

    SciTech Connect (OSTI)

    Naftz, D.L. (Geological Survey, Cheyenne, WY (United States)); Rice, J.A. (South Dakota State Univ., Brookings (United States)); Ranville, J.R. (Geological Survey, Denver, CO (United States))

    1991-06-01T23:59:59.000Z

    During a reconnaissance study, ice samples were collected from Knife Point glacier to determine if glaciers in the Wind River Range Could provide a long-term record of the chemical composition of wet deposition. Eight annual ice layers comprising the years 1980-1987 were identified. The concentration of calcium, chloride, and sulfate in the annual-weighted wet deposition samples collected at the National Atmospheric deposition Program (NADP) station near Pinedale, Wyoming, showed a significant, positive correlation to the concentration of the same major ions in composite samples from the annual ice layers. results of the study imply that continuous ice cores reaching to the deeper parts of glaciers in the Wind River Range could provide long-term records of the chemical composition of wet deposition.

  13. New ice rules for nanoconfined monolayer ice from first principles

    E-Print Network [OSTI]

    Corsetti, Fabiano; Artacho, Emilio

    2015-01-01T23:59:59.000Z

    Understanding the structural tendencies of nanoconfined water is of great interest for nanoscience and biology, where nano/micro-sized objects may be separated by very few layers of water. Here we investigate the properties of ice confined to a quasi-2D monolayer by a featureless, chemically neutral potential, using density-functional theory simulations with a non-local van der Waals density functional. An ab initio random structure search reveals all the energetically competitive monolayer configurations to belong to only two of the previously-identified families, characterized by a square or honeycomb hydrogen-bonding network, respectively. From an in-depth analysis we show that the well-known ice rules for bulk ice need to be revised for the monolayer, with distinct new rules appearing for the two networks. All identified stable phases for both are found to be non-polar (but with a topologically non-trivial texture for the square) and, hence, non-ferroelectric, in contrast to the predictions of empirical f...

  14. Policy #2010 Publications Policy and Graphic Guidelines 1 OLD DOMINION UNIVERSITY

    E-Print Network [OSTI]

    's professional image. Graphic Guidelines Visual standards applied to advertising, publications and other printed materials. F. PROCEDURES Graphic identity program standards, as wellPolicy #2010 ­ Publications Policy and Graphic Guidelines 1 OLD DOMINION UNIVERSITY University

  15. Parallel Simulation for a Fish Schooling Model on a General-Purpose Graphics Processing Unit

    E-Print Network [OSTI]

    Li, Hong; Kolpas, Allison; Petzold, Linda; Moehlis, J

    2009-01-01T23:59:59.000Z

    Model on a General-Purpose Graphics Processing Unit Hong LiThe current generation of graphics processing units is well-we will describe how a Graphics Pro- cessor Unit (GPU) can

  16. Microsoft Word - Graphics A-76 Post - MEO VV Review Report _F...

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

    Microsoft Word - Graphics A-76 Post - MEO VV Review Report F.doc Microsoft Word - Graphics A-76 Post - MEO VV Review Report F.doc Microsoft Word - Graphics A-76 Post - MEO VV...

  17. Improving Usability of Interactive Graphics Specification and Implementation with Picking Views

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Improving Usability of Interactive Graphics Specification and Implementation with Picking Views.conversy@enac.fr Abstract-- Specifying and programming graphical interactions are difficult tasks, notably because designers architecture improves the usability of the specification and the implementation of graphical interaction

  18. High pressure melt ejection and direct containment heating in ice condenser containments

    SciTech Connect (OSTI)

    Pilch, M.; Tarbell, W.W.; Carroll, D.E.; Tills, J.L.

    1986-01-01T23:59:59.000Z

    A response of a typical ice condenser containment to a high pressure melt dispersal accident has been studied. While ice beds may be effective in reducing the potential loading caused by direct heating of the containment atmosphere, analyses suggest two other modes of containment failure that have not been previously identified. Calculations with the CONTAIN code indicate that ejected core debris may interact with steam from the primary system, generating sufficient hydrogen to threaten containment integrity. Further, if the debris ejected into the cavity promptly fails the seal table, the dispersed material could enter the in-core instrument room and attack the containment liner. The timing of the failure of the seal table is highly dependent on the characteristics of the debris-to-steel energy transfer.

  19. Hydrogen ICE Vehicle Testing Activities

    SciTech Connect (OSTI)

    J. Francfort; D. Karner

    2006-04-01T23:59:59.000Z

    The Advanced Vehicle Testing Activity teamed with Electric Transportation Applications and Arizona Public Service to develop and monitor the operations of the APS Alternative Fuel (Hydrogen) Pilot Plant. The Pilot Plant provides 100% hydrogen, and hydrogen and compressed natural gas (H/CNG)-blended fuels for the evaluation of hydrogen and H/CNG internal combustion engine (ICE) vehicles in controlled and fleet testing environments. Since June 2002, twenty hydrogen and H/CNG vehicles have accumulated 300,000 test miles and 5,700 fueling events. The AVTA is part of the Department of Energy’s FreedomCAR and Vehicle Technologies Program. These testing activities are managed by the Idaho National Laboratory. This paper discusses the Pilot Plant design and monitoring, and hydrogen ICE vehicle testing methods and results.

  20. Sea Ice Enhancements to Polar WRF* Keith M. Hines1**

    E-Print Network [OSTI]

    Howat, Ian M.

    of Arctic multi-year ice is30 decreasing with more of the ice pack represented by seasonal sea iceSea Ice Enhancements to Polar WRF* Keith M. Hines1** , David H. Bromwich,1,2 , Lesheng Bai1 to6 WRF Version 3.4 include modified Noah land surface model sea ice treatment, allowing7 specified

  1. GREAT LAKES ICE COVER RaymondA. Asset'

    E-Print Network [OSTI]

    Chapter 6 GREAT LAKES ICE COVER RaymondA. Asset' ABSTRACT: Theformation of ice on the Lallrentian (~rthe Great Lakes anel local weather and climate. The (I1Inllal seasonal and ~'Patialprogression of ice Lake (Section 6.2) incillding ice thickness, the different types of iceformed, and ice classification

  2. An Ice Lithography Instrument Anpan Han 1, John Chervinsky2

    E-Print Network [OSTI]

    Page 1 An Ice Lithography Instrument Anpan Han 1, John Chervinsky2 , Daniel Branton3 , and J. A a new nano-patterning method called ice lithography, where ice is used as the resist. Water vapor. The vapor condenses, covering the sample with an amorphous layer of ice. To form a lift-off mask, ice

  3. Secure Core Contact Information

    E-Print Network [OSTI]

    Secure Core Contact Information C. E. Irvine irvine@nps.edu 831-656-2461 Department of Computer for the secure management of local and/or remote information in multiple contexts. The SecureCore project Science Graduate School of Operations and Information Sciences www.cisr.nps.edu Project Description

  4. Exploring the Earth matter effect with atmospheric neutrinos in ice

    E-Print Network [OSTI]

    Sanjib Kumar Agarwalla; Tracey Li; Olga Mena; Sergio Palomares-Ruiz

    2012-12-10T23:59:59.000Z

    We study the possibility to perform neutrino oscillation tomography and to determine the neutrino mass hierarchy in kilometer-scale ice Cerenkov detectors by means of the theta13-driven matter effects which occur during the propagation of atmospheric neutrinos deep through the Earth. We consider the ongoing IceCube/DeepCore neutrino observatory and future planned extensions, such as the PINGU detector, which has a lower energy threshold. Our simulations include the impact of marginalization over the neutrino oscillation parameters and a fully correlated systematic uncertainty on the total number of events. For the current best-fit value of the mixing angle theta13, the DeepCore detector, due to its relatively high-energy threshold, could only be sensitive to fluctuations on the normalization of the Earth's density of \\Delta\\rho \\simeq \\pm 10% at ~ 1.6 sigma CL after 10 years in the case of a true normal hierarchy. For the two PINGU configurations we consider, overall density fluctuations of \\Delta\\rho \\simeq \\pm 3% (\\pm 2%) could be measured at the 2 sigma CL after 10 years, also in the case of a normal mass hierarchy. We also compare the prospects to determine the neutrino mass hierarchy in these three configurations and find that this could be achieved at the 5 sigma CL, for both hierarchies, after 5 years in DeepCore and about 1 year in PINGU. This clearly shows the importance of lowering the energy threshold below 10 GeV so that detectors are fully sensitive to the resonant matter effects.

  5. FAFCO Ice Storage test report

    SciTech Connect (OSTI)

    Stovall, T.K.

    1993-11-01T23:59:59.000Z

    The Ice Storage Test Facility (ISTF) is designed to test commercial ice storage systems. FAFCO provided a storage tank equipped with coils designed for use with a secondary fluid system. The FAFCO ice storage system was tested over a wide range of operating conditions. Measured system performance during charging showed the ability to freeze the tank fully, storing from 150 to 200 ton-h. However, the charging rate showed significant variations during the latter portion of the charge cycle. During discharge cycles, the storage tank outlet temperature was strongly affected by the discharge rate and tank state of charge. The discharge capacity was dependent upon both the selected discharge rate and maximum allowable tank outlet temperature. Based on these tests, storage tank selection must depend on both charge and discharge conditions. This report describes FAFCO system performance fully under both charging and discharging conditions. While the test results reported here are accurate for the prototype 1990 FAFCO Model 200, currently available FAFCO models incorporate significant design enhancements beyond the Model 200. At least one major modification was instituted as a direct result of the ISTF tests. Such design improvements were one of EPRI`s primary goals in founding the ISTF.

  6. Measurement of South Pole ice transparency with the IceCube LED calibration system

    E-Print Network [OSTI]

    IceCube Collaboration; M. G. Aartsen; R. Abbasi; Y. Abdou; M. Ackermann; J. Adams; J. A. Aguilar; M. Ahlers; D. Altmann; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; V. Baum; R. Bay; J. J. Beatty; S. Bechet; J. Becker Tjus; K. -H. Becker; M. Bell; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; A. Bernhard; D. Bertrand; D. Z. Besson; G. Binder; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; S. Bohaichuk; C. Bohm; D. Bose; S. Böser; O. Botner; L. Brayeur; A. M. Brown; R. Bruijn; J. Brunner; S. Buitink; M. Carson; J. Casey; M. Casier; D. Chirkin; B. Christy; K. Clark; F. Clevermann; S. Cohen; D. F. Cowen; A. H. Cruz Silva; M. Danninger; J. Daughhetee; J. C. Davis; C. De Clercq; S. De Ridder; P. Desiati; M. de With; T. DeYoung; J. C. Díaz-Vélez; M. Dunkman; R. Eagan; B. Eberhardt; J. Eisch; R. W. Ellsworth; S. Euler; P. A. Evenson; O. Fadiran; A. R. Fazely; A. Fedynitch; J. Feintzeig; T. Feusels; K. Filimonov; C. Finley; T. Fischer-Wasels; S. Flis; A. Franckowiak; R. Franke; K. Frantzen; T. Fuchs; T. K. Gaisser; J. Gallagher; L. Gerhardt; L. Gladstone; T. Glüsenkamp; A. Goldschmidt; G. Golup; J. A. Goodman; D. Góra; D. Grant; A. Groß; M. Gurtner; C. Ha; A. Haj Ismail; A. Hallgren; F. Halzen; K. Hanson; D. Heereman; P. Heimann; D. Heinen; K. Helbing; R. Hellauer; S. Hickford; G. C. Hill; K. D. Hoffman; R. Hoffmann; A. Homeier; K. Hoshina; W. Huelsnitz; P. O. Hulth; K. Hultqvist; S. Hussain; A. Ishihara; E. Jacobi; J. Jacobsen; G. S. Japaridze; K. Jero; O. Jlelati; B. Kaminsky; A. Kappes; T. Karg; A. Karle; J. L. Kelley; J. Kiryluk; F. Kislat; J. Kläs; S. R. Klein; J. -H. Köhne; G. Kohnen; H. Kolanoski; L. Köpke; C. Kopper; S. Kopper; D. J. Koskinen; M. Kowalski; M. Krasberg; G. Kroll; J. Kunnen; N. Kurahashi; T. Kuwabara; M. Labare; H. Landsman; M. J. Larson; M. Lesiak-Bzdak; J. Leute; J. Lünemann; J. Madsen; R. Maruyama; K. Mase; H. S. Matis; F. McNally; K. Meagher; M. Merck; P. Mészáros; T. Meures; S. Miarecki; E. Middell; N. Milke; J. Miller; L. Mohrmann; T. Montaruli; R. Morse; R. Nahnhauer; U. Naumann; H. Niederhausen; S. C. Nowicki; D. R. Nygren; A. Obertacke; S. Odrowski; A. Olivas; M. Olivo; A. O'Murchadha; L. Paul; J. A. Pepper; C. Pérez de los Heros; C. Pfendner; D. Pieloth; N. Pirk; J. Posselt; P. B. Price; G. T. Przybylski; L. Rädel; K. Rawlins; P. Redl; E. Resconi; W. Rhode; M. Ribordy; M. Richman; B. Riedel; J. P. Rodrigues; C. Rott; T. Ruhe; B. Ruzybayev; D. Ryckbosch; S. M. Saba; T. Salameh; H. -G. Sander; M. Santander; S. Sarkar; K. Schatto; M. Scheel; F. Scheriau; T. Schmidt; M. Schmitz; S. Schoenen; S. Schöneberg; L. Schönherr; A. Schönwald; A. Schukraft; L. Schulte; O. Schulz; D. Seckel; S. H. Seo; Y. Sestayo; S. Seunarine; C. Sheremata; M. W. E. Smith; M. Soiron; D. Soldin; G. M. Spiczak; C. Spiering; M. Stamatikos; T. Stanev; A. Stasik; T. Stezelberger; R. G. Stokstad; A. Stößl; E. A. Strahler; R. Ström; G. W. Sullivan; H. Taavola; I. Taboada; A. Tamburro; S. Ter-Antonyan; S. Tilav; P. A. Toale; S. Toscano; M. Usner; D. van der Drift; N. van Eijndhoven; A. Van Overloop; J. van Santen; M. Vehring; M. Voge; M. Vraeghe; C. Walck; T. Waldenmaier; M. Wallraff; R. Wasserman; Ch. Weaver; M. Wellons; C. Wendt; S. Westerhoff; N. Whitehorn; K. Wiebe; C. H. Wiebusch; D. R. Williams; H. Wissing; M. Wolf; T. R. Wood; C. Xu; D. L. Xu; X. W. Xu; J. P. Yanez; G. Yodh; S. Yoshida; P. Zarzhitsky; J. Ziemann; S. Zierke; A. Zilles; M. Zoll

    2013-01-22T23:59:59.000Z

    The IceCube Neutrino Observatory, approximately 1 km^3 in size, is now complete with 86 strings deployed in the Antarctic ice. IceCube detects the Cherenkov radiation emitted by charged particles passing through or created in the ice. To realize the full potential of the detector, the properties of light propagation in the ice in and around the detector must be well understood. This report presents a new method of fitting the model of light propagation in the ice to a data set of in-situ light source events collected with IceCube. The resulting set of derived parameters, namely the measured values of scattering and absorption coefficients vs. depth, is presented and a comparison of IceCube data with simulations based on the new model is shown.

  7. Ice Shelf Water plume flow beneath Filchner-Ronne Ice Shelf, Antarctica

    E-Print Network [OSTI]

    Feltham, Daniel

    the thinning of Pine Island Glacier in West Antarctica and the collapse of parts of the Larsen Ice Shelf temperature variation is called the ``ice pump'' [Lewis and Perkin, 1983; Jenkins and Bombosch, 1995]. [5

  8. Nodal Discontinuous Galerkin Methods on Graphics Processors

    E-Print Network [OSTI]

    Klöckner, Andreas; Bridge, Jeffrey; Hesthaven, Jan S

    2009-01-01T23:59:59.000Z

    Discontinuous Galerkin (DG) methods for the numerical solution of partial differential equations have enjoyed considerable success because they are both flexible and robust: They allow arbitrary unstructured geometries and easy control of accuracy without compromising simulation stability. Lately, another property of DG has been growing in importance: The majority of a DG operator is applied in an element-local way, with weak penalty-based element-to-element coupling. The resulting locality in memory access is one of the factors that enables DG to run on off-the-shelf, massively parallel graphics processors (GPUs). In addition, DG's high-order nature lets it require fewer data points per represented wavelength and hence fewer memory accesses, in exchange for higher arithmetic intensity. Both of these factors work significantly in favor of a GPU implementation of DG. Using a single US$400 Nvidia GTX 280 GPU, we accelerate a solver for Maxwell's equations on a general 3D unstructured grid by a factor of 40 to 6...

  9. Controlling ice nucleation through surface hydrophilicity

    E-Print Network [OSTI]

    Stephen J. Cox; Shawn M. Kathmann; Ben Slater; Angelos Michaelides

    2015-01-08T23:59:59.000Z

    Ice formation is one of the most common and important processes on Earth and almost always occurs at the surface of a material. A basic understanding of how the physiochemical properties of a material's surface affects its ability to form ice has remained elusive. Here we use molecular dynamics simulations to directly probe heterogeneous ice nucleation at an hexagonal surface of a nanoparticle of varying hydrophilicity. Surprisingly, we find that structurally identical surfaces can both inhibit and promote ice formation and analogous to a chemical catalyst, it is found that an optimal interaction between the surface and the water exists for promoting ice nucleation. We use our microscopic understanding of the mechanism to design a modified surface in silico with enhanced ice nucleating ability.

  10. Observations of ice thickness and frazil ice in the St. Lawrence Island polynya from satellite imagery, upward looking sonar, and

    E-Print Network [OSTI]

    Washington at Seattle, University of

    . The combination of the SAR imagery and ULS observations also allow measurement of the pack ice advection velocityObservations of ice thickness and frazil ice in the St. Lawrence Island polynya from satellite define a thermal ice thickness from the AVHRR retrieval of ice surface temperature combined

  11. INDICATOR: LAKE ERIE ICE COVER Winter ice cover on Lake Erie affects the amount of heat and moisture transferred

    E-Print Network [OSTI]

    102 INDICATOR: LAKE ERIE ICE COVER Background Winter ice cover on Lake Erie affects the amount of heat and moisture transferred between the lake and the atmosphere. During winter, ice and snow can decrease the amount of light available below the ice surface for photosynthesis. In the absence of an ice

  12. 4, 107128, 2007 Sea-ice-drift

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    OSD 4, 107­128, 2007 Sea-ice-drift dynamics and pack fracture A. Chmel et al. Title Page Abstract aspects of the sea-ice-drift dynamics and pack fracture A. Chmel 1 , V. N. Smirnov 2 , and L. V. Panov 2 1 to: A. Chmel (chmel@mail.ioffe.ru) 107 #12;OSD 4, 107­128, 2007 Sea-ice-drift dynamics and pack

  13. Summer ICE@Tech Computing Camps

    E-Print Network [OSTI]

    Guzdial, Mark

    Summer ICE@Tech Computing Camps Session I: June 5th - June 9th Session II: July 10th ­ July 14th (404) 385-2273 Fax (404) 385-0965 http://www.cc.gatech.edu/campice 1 #12;2 Summer ICE@Tech Program Handbook #12;3 Summer ICE@Tech is a computing and technology program for students entering 10th , 11th

  14. H2 ICE Combustion | Argonne National Laboratory

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

    H2 ICE Combustion Share Description Hydrogen combustion inside a direct injection H2 engine Topic Energy Energy efficiency Vehicles Hydrogen & fuel cells Credit S. Ciatti This...

  15. Viscosity of interfacial water regulates ice nucleation

    SciTech Connect (OSTI)

    Li, Kaiyong; Chen, Jing; Zhang, Qiaolan; Zhang, Yifan [Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China) [Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China); University of Chinese Academy of Sciences, Beijing 100049 (China); Xu, Shun; Zhou, Xin [School of Physics, University of Chinese Academy of Sciences, Beijing 100049 (China)] [School of Physics, University of Chinese Academy of Sciences, Beijing 100049 (China); Cui, Dapeng; Wang, Jianjun, E-mail: wangj220@iccas.ac.cn; Song, Yanlin [Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)] [Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190 (China)

    2014-03-10T23:59:59.000Z

    Ice formation on solid surfaces is an important phenomenon in many fields, such as cloud formation and atmospheric icing, and a key factor for applications in preventing freezing. Here, we report temperature-dependent nucleation rates of ice for hydrophilic and hydrophobic surfaces. The results show that hydrophilic surface presents a lower ice nucleation rate. We develop a strategy to extract the thermodynamic parameters, J{sub 0} and ?, in the context of classical nucleation theory. From the extracted J{sub 0} and ?, we reveal the dominant role played by interfacial water. The results provide an insight into freezing mechanism on solid surfaces.

  16. Dynamics of colloidal particles in ice

    E-Print Network [OSTI]

    Melissa Spannuth; S. G. J. Mochrie; S. S. L. Peppin; J. S. Wettlaufer

    2010-12-31T23:59:59.000Z

    We use X-ray Photon Correlation Spectroscopy (XPCS) to probe the dynamics of colloidal particles in polycrystalline ice. During freezing, the dendritic ice morphology and rejection of particles from the ice created regions of high-particle-density, where some of the colloids were forced into contact and formed disordered aggregates. We find that the particles in these high density regions underwent ballistic motion coupled with both stretched and compressed exponential decays of the intensity autocorrelation function, and that the particles' characteristic velocity increased with temperature. We explain this behavior in terms of ice grain boundary migration.

  17. BISICLES Captures Details of Retreating Antarctic Ice

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

    of Retreating Antarctic Ice March 30, 2013 | Tags: Climate Research, Hopper, Math & Computer Science Contact: Linda Vu, lvu@lbl.gov, +1 510 495 2402 Berkeley Lab Contributes...

  18. Past Accumulation Rates of the Western Antarctic Ice Sheet Near an Ice Divide 

    E-Print Network [OSTI]

    Child, Sarah

    2009-08-12T23:59:59.000Z

    The study of accumulation rates of ice is a direct link to the evolution of ice sheet. It is believed by scientists that ice sheet evolution will aid in the mystery of climate change and may lead to predictions about climates in the future...

  19. Satellite SAR Remote Sensing of Great Lakes Ice Cover, Part 2. Ice Classification and Mapping

    E-Print Network [OSTI]

    Satellite SAR Remote Sensing of Great Lakes Ice Cover, Part 2. Ice Classification and Mapping° to 60° for all polarizations, was processed to radar cross-section to establish a library of signatures (look-up table) for different ice types. The library is used in the computer classifica- tion

  20. ARKTOS: An intelligent system for SAR sea ice image classification

    E-Print Network [OSTI]

    Soh, L. K.; Tsatsoulis, Costas; Gineris, D.; Bertoia, C.

    2004-01-01T23:59:59.000Z

    We present an intelligent system for satellite sea ice image analysis named Advanced Reasoning using Knowledge for T ping Of Sea ice (ARKTOS). ARKTOS performs fully automated analysis of synthetic aperture radar (SAR) sea ice images by mimicking...

  1. Hail Ice Damage of Stringer-Stiffened Curved Composite Panels /

    E-Print Network [OSTI]

    Le, Jacqueline Linh

    2013-01-01T23:59:59.000Z

    Damage. Composite Structures 2003;62:213–21. Ice Drop.How to make clear ice. 28 February 2011. Victoria, BC,2011/02/how-to- make-clear-ice-that-actually-works/ Graham,

  2. Dust takes detour on ice-cloud journey | EMSL

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

    Dust takes detour on ice-cloud journey Dust takes detour on ice-cloud journey Pollution-coated particles bypass ice formation, but influence clouds Cirrus clouds are composed of...

  3. Sandia National Laboratories: Ice-Sheet Simulation Code Matures...

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

    Research & Capabilities Ice-flow velocity magnitude myr on the surface of the Greenland Ice Sheet, as computed by the AlbanyFELIX finite element code. Ice-flow velocity...

  4. Core shroud corner joints

    DOE Patents [OSTI]

    Gilmore, Charles B.; Forsyth, David R.

    2013-09-10T23:59:59.000Z

    A core shroud is provided, which includes a number of planar members, a number of unitary corners, and a number of subassemblies each comprising a combination of the planar members and the unitary corners. Each unitary corner comprises a unitary extrusion including a first planar portion and a second planar portion disposed perpendicularly with respect to the first planar portion. At least one of the subassemblies comprises a plurality of the unitary corners disposed side-by-side in an alternating opposing relationship. A plurality of the subassemblies can be combined to form a quarter perimeter segment of the core shroud. Four quarter perimeter segments join together to form the core shroud.

  5. The incorporation of bubbles into a computer graphics fluid simulation

    E-Print Network [OSTI]

    Greenwood, Shannon Thomas

    2005-08-29T23:59:59.000Z

    We present methods for incorporating bubbles into a photorealistc fluid simulation. Previous methods of fluid simulation in computer graphics do not include bubbles. Our system automatically creates bubbles, which are simulated on top of the fluid...

  6. Feedback message passing for inference in Gaussian graphical models

    E-Print Network [OSTI]

    Liu, Ying, Ph. D. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science

    2010-01-01T23:59:59.000Z

    For Gaussian graphical models with cycles, loopy belief propagation often performs reasonably well, but its convergence is not guaranteed and the computation of variances is generally incorrect. In this paper, we identify ...

  7. Feedback Message Passing for Inference in Gaussian Graphical Models

    E-Print Network [OSTI]

    Liu, Ying

    For Gaussian graphical models with cycles, loopy belief propagation often performs reasonably well, but its convergence is not guaranteed and the computation of variances is generally incorrect. In this paper, we identify ...

  8. Inference in sensor networks : graphical models and particle methods

    E-Print Network [OSTI]

    Ihler, Alexander T. (Alexander Thomas), 1976-

    2005-01-01T23:59:59.000Z

    Sensor networks have quickly risen in importance over the last several years to become an active field of research, full of difficult problems and applications. At the same time, graphical models have shown themselves to ...

  9. Decoupled Sampling for Real-Time Graphics Pipelines

    E-Print Network [OSTI]

    Ragan-Kelley, Jonathan

    2010-03-29T23:59:59.000Z

    We propose decoupled sampling, an approach that decouples shading from visibility sampling in order to enable motion blur and depth-of-field at reduced cost. More generally, it enables extensions of modern real-time graphics ...

  10. Approximate Bayesian Image Interpretation using Generative Probabilistic Graphics Programs

    E-Print Network [OSTI]

    Mansinghka, Vikash Kumar

    2013-01-01T23:59:59.000Z

    The idea of computer vision as the Bayesian inverse problem to computer graphics has a long history and an appealing elegance, but it has proved difficult to directly implement. Instead, most vision tasks are approached ...

  11. A microprocessor driven liquid crystal graphics display for aircraft use

    E-Print Network [OSTI]

    Marzke, Lee Howard

    1984-01-01T23:59:59.000Z

    A complete graphics system for use in modular avionics is built around a liquid crystal flat panel display. Screen refresh is handled by display controller that provides a bit mapped representation of the display in RAM. ...

  12. A graphical environment to express the semantics of control systems

    E-Print Network [OSTI]

    Wang, Timothy; Feron, E

    2011-01-01T23:59:59.000Z

    We present the concept of a unified graphical environment for expressing the semantics of control systems. The graphical control system design environment in Simulink already allows engineers to insert a variety of assertions aimed the verification and validation of the control software. We propose extensions to a Simulink-like environment's annotation capabilities to include formal control system stability, performance properties and their proofs. We provide a conceptual description of a tool, that takes in a Simulink-like diagram of the control system as the input, and generates a graphically annotated control system diagram as the output. The annotations can either be inserted by the user or generated automatically by a third party control analysis software such as IQC$\\beta$ or $\\mu$-tool. We finally describe how the graphical representation of the system and its properties can be translated to annotated programs in a programming language used in verification and validation such as Lustre or C.

  13. Approximate inference in graphical models using LP relaxations

    E-Print Network [OSTI]

    Sontag, David Alexander

    2010-01-01T23:59:59.000Z

    Graphical models such as Markov random fields have been successfully applied to a wide variety of fields, from computer vision and natural language processing, to computational biology. Exact probabilistic inference is ...

  14. The TV Turtle: A Logo Graphics System for Raster Displays

    E-Print Network [OSTI]

    Lieberman, Henry

    1976-06-01T23:59:59.000Z

    Until recently, most computer graphics systems have been oriented toward the display of line drawins, continually refreshing the screen from a display list of vectors. Developments such as plasma panel displays and ...

  15. A Comparison of Graphical Techniques for Asymmetric Decision Problems

    E-Print Network [OSTI]

    Bielza, Concha; Shenoy, Prakash P.

    1999-11-01T23:59:59.000Z

    We compare four graphical techniques for representation and solution of asymmetric decision problems—decision trees, influence diagrams, valuation networks, and sequential decision diagrams. We solve a modified version of ...

  16. Computation of Large Covariance Matrices by SAMMY on Graphical Processing Units and Multicore CPUs

    SciTech Connect (OSTI)

    Arbanas, Goran [ORNL; Dunn, Michael E [ORNL; Wiarda, Dorothea [ORNL

    2011-01-01T23:59:59.000Z

    Computational power of Graphical Processing Units and multicore CPUs was harnessed by the nuclear data evaluation code SAMMY to speed up computations of large Resonance Parameter Covariance Matrices (RPCMs). This was accomplished by linking SAMMY to vendor-optimized implementations of the matrix-matrix multiplication subroutine of the Basic Linear Algebra Library to compute the most time-consuming step. The U-235 RPCM computed previously using a triple-nested loop was re-computed using the NVIDIA implementation of the subroutine on a single Tesla Fermi Graphical Processing Unit, and also using the Intel's Math Kernel Library implementation on two different multicore CPU systems. A multiplication of two matrices of dimensions 16,000 x 20,000 that had previously taken days, took approximately one minute on the GPU. Similar performance was achieved on a dual six-core CPU system. The magnitude of the speed-up suggests that these, or similar, combinations of hardware and libraries may be useful for large matrix operations in SAMMY. Uniform interfaces of standard linear algebra libraries make them a promising candidate for a programming framework of a new generation of SAMMY for the emerging heterogeneous computing platforms.

  17. The Patty Ice Arena User Responsibilities and Conduct is designed to create better communication between the patrons of the Patty Ice Arena and the Facilities Services' Patty Ice

    E-Print Network [OSTI]

    Wagner, Diane

    PURPOSE: The Patty Ice Arena User Responsibilities and Conduct is designed to create better communication between the patrons of the Patty Ice Arena and the Facilities Services' Patty Ice Arena management or other misuse of any part of the Patty Ice Arena may result in an individual, team, or organization being

  18. Constraint methods for neural networks and computer graphics

    SciTech Connect (OSTI)

    Platt, J.C.

    1989-01-01T23:59:59.000Z

    Both computer graphics and neural networks are related, in that they model natural phenomena. Physically-based models are used by computer graphics researchers to create realistic, natural animation, and neural models are used by neural network researchers to create new algorithms or new circuits. To exploit successfully these graphical and neural models, engineers want models that fulfill designer-specified goals. These goals are converted into mathematical constraints. This thesis presents constraint methods for computer graphics and neural networks. The mathematical constraint methods modify the differential equations that govern the neural or physically-based models. The constraint methods gradually enforce the constraints exactly. This thesis also described application of constrained models to real problems. The first half of this theses discusses constrained neural networks. The desired models and goals are often converted into constrained optimization problems. These optimization problems are solved using first-order differential equations. The applications of constrained neural networks include the creation of constrained circuits, error-correcting codes, symmetric edge detection for computer vision, and heuristics for the traveling salesman problem. The second half of this thesis discusses constrained computer graphics models. In computer graphics, the desired models and goals become constrained mechanical systems, which are typically simulated with second-order differential equations. The Penalty Method adds springs to the mechanical system to penalize violations of the constraints. Rate Controlled Constraints add forces and impulses to the mechanical system to fulfill the constraints with critically damped motion.

  19. Development and New Directions for the RELAP5-3D Graphical Users Interface

    SciTech Connect (OSTI)

    Mesina, George Lee

    2001-09-01T23:59:59.000Z

    The direction of development for the RELAP5 Graphical User Interfaces (RGUI) has been extended. In addition to existing plans for displaying all aspects of RELAP5 calculations, the plan now includes plans to display the calculations of a variety of codes including SCDAP, RETRAN and FLUENT. Recent work has included such extensions along with the previously planned and user-requested improvements and extensions. Visualization of heat-structures has been added. Adaptations were made for another computer program, SCDAP-3D, including plant core views. An input model builder for generating RELAP5-3D input files was partially implemented. All these are reported. Plans for future work are also summarized. These include an input processor that transfers steady-state conditions into an input file.

  20. Midland Core Repository

    SciTech Connect (OSTI)

    Tyler, Noel

    2000-08-14T23:59:59.000Z

    This report summarizes activities for the repository during this quarter. The repository holds drill cores and cuttings samples from oil wells that can be viewed or checked out by users.

  1. Heterogeneous Nucleation of Ice on Anthropogenic Organic Particles...

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

    Nucleation of Ice on Anthropogenic Organic Particles Collected in Mexico City. Heterogeneous Nucleation of Ice on Anthropogenic Organic Particles Collected in Mexico City....

  2. Heterogeneous ice nucleation and water uptake by field-collected...

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

    ice nucleation and water uptake by field-collected atmospheric particles below 273 K. Heterogeneous ice nucleation and water uptake by field-collected atmospheric particles below...

  3. Crystalline Ice Growth on Pt(111): Observation of a Hydrophobic...

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

    Crystalline Ice Growth on Pt(111): Observation of a Hydrophobic Water Monolayer. Crystalline Ice Growth on Pt(111): Observation of a Hydrophobic Water Monolayer. Abstract: The...

  4. The dependence of ice microphysics on aerosol concentration in...

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

    The dependence of ice microphysics on aerosol concentration in arctic mixed-phase stratus clouds during ISDAC and M-PACE. The dependence of ice microphysics on aerosol...

  5. Complex systems influence melting of Greenland ice sheet

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

    Complex systems influence melting of Greenland ice sheet Complex systems influence melting of Greenland ice sheet International research team's field work shows that, well, things...

  6. Unlocking a Sea Ice Secret

    SciTech Connect (OSTI)

    Dr. Rachel Obbard

    2013-04-22T23:59:59.000Z

    Dr. Rachel Obbard and her research group from Dartmouth College traveled to the Antarctic to collect samples of sea ice. Next stop: the GeoSoilEnviroCARS x-ray beamline at the Advanced Photon Source at Argonne National Laboratory in Illinois. This U.S. Department of Energy Office of Science synchrotron x-ray research facility gave the Obbard team the frontier scientific tools they needed to study the path bromide takes as it travels from the ocean to the atmosphere.

  7. ARM - Measurement - Cloud ice particle

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadap Documentation TDMADAP : XDC documentationBarrow,ice particle ARM Data Discovery Browse Data

  8. ARM - Measurement - Ice water content

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadap Documentation TDMADAP : XDC documentationBarrow,ice particleSize Distributiontypes

  9. ARM - Measurement - Ice water path

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadap Documentation TDMADAP : XDC documentationBarrow,ice particleSize Distributiontypespath ARM

  10. ARM - TWP-ICE Maps

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadap Documentation TDMADAP :ProductsVaisalaAlaskaInstruments NSASteeringContactsTWP-ICE Maps

  11. Ice Energy | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetecGtel JumpCounty, Texas:ITC Transmission Jump to: navigation,IbervilleIce

  12. Emergency core cooling system

    DOE Patents [OSTI]

    Schenewerk, William E. (Sherman Oaks, CA); Glasgow, Lyle E. (Westlake Village, CA)

    1983-01-01T23:59:59.000Z

    A liquid metal cooled fast breeder reactor provided with an emergency core cooling system includes a reactor vessel which contains a reactor core comprising an array of fuel assemblies and a plurality of blanket assemblies. The reactor core is immersed in a pool of liquid metal coolant. The reactor also includes a primary coolant system comprising a pump and conduits for circulating liquid metal coolant to the reactor core and through the fuel and blanket assemblies of the core. A converging-diverging venturi nozzle with an intermediate throat section is provided in between the assemblies and the pump. The intermediate throat section of the nozzle is provided with at least one opening which is in fluid communication with the pool of liquid sodium. In normal operation, coolant flows from the pump through the nozzle to the assemblies with very little fluid flowing through the opening in the throat. However, when the pump is not running, residual heat in the core causes fluid from the pool to flow through the opening in the throat of the nozzle and outwardly through the nozzle to the assemblies, thus providing a means of removing decay heat.

  13. MCNP LWR Core Generator

    SciTech Connect (OSTI)

    Fischer, Noah A. [Los Alamos National Laboratory

    2012-08-14T23:59:59.000Z

    The reactor core input generator allows for MCNP input files to be tailored to design specifications and generated in seconds. Full reactor models can now easily be created by specifying a small set of parameters and generating an MCNP input for a full reactor core. Axial zoning of the core will allow for density variation in the fuel and moderator, with pin-by-pin fidelity, so that BWR cores can more accurately be modeled. LWR core work in progress: (1) Reflectivity option for specifying 1/4, 1/2, or full core simulation; (2) Axial zoning for moderator densities that vary with height; (3) Generating multiple types of assemblies for different fuel enrichments; and (4) Parameters for specifying BWR box walls. Fuel pin work in progress: (1) Radial and azimuthal zoning for generating further unique materials in fuel rods; (2) Options for specifying different types of fuel for MOX or multiple burn assemblies; (3) Additional options for replacing fuel rods with burnable poison rods; and (4) Control rod/blade modeling.

  14. Core Values | Department of Energy

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

    Core Values Core Values People - People are our most important resource. We respect and use our experience and skills and appreciate our diversity. Business Excellence - We are...

  15. LOW DELAY STREAMING OF COMPUTER GRAPHICS P. Eisert and P. Fechteler

    E-Print Network [OSTI]

    Eisert, Peter

    . There exist already several standards for graphics compression like, e.g. X3D [5] or the 3D Graphics ComLOW DELAY STREAMING OF COMPUTER GRAPHICS P. Eisert and P. Fechteler Fraunhofer Institute,philipp.fechteler}@hhi.fraunhofer.de ABSTRACT In this paper, we present a graphics streaming system for remote gaming in a local area network

  16. Migrating graphics applications and tech-niques to the Web introduces techno-

    E-Print Network [OSTI]

    Lau, W. H. Nynson

    standards that let us develop library tools for portable graphics applications. These standards must run, and the major computer firms inter- ested in this market must accept the standards. As 3D Web graphics advance on making DVEs both realistic and lightweight for the Web environment. Web graphics standards Graphics

  17. The Design of a Parallel Graphics Interface Homan Igehy Gordon Stoll Pat Hanrahan

    E-Print Network [OSTI]

    Stanford University

    The Design of a Parallel Graphics Interface Homan Igehy Gordon Stoll Pat Hanrahan Computer Science- performance graphics accelerator at full speed with a serial imme- diate-mode graphics interface. To resolve this problem, retained- mode constructs have been integrated into graphics interfaces. While retained

  18. @ @ Computer Graphics, Volume 25, Number 4, July 1991 A Comprehensive Physical Model

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    @ @ Computer Graphics, Volume 25, Number 4, July 1991 A Comprehensive Physical Model for Light Graphics Cornell University Ithaca, NY 14853 Abstract A new general reflectance model for computer graphics and suitable for Computer Graphics appli- cations. Predicted reflectance distributions compare favorably

  19. Sense and Sidedness in the Graphics Pipeline via a Passage through a Separable Space

    E-Print Network [OSTI]

    Toronto, University of

    Sense and Sidedness in the Graphics Pipeline via a Passage through a Separable Space Sherif Ghali Abstract Computer graphics is ostensibly based on projective geometry. The graphics pipeline--the sequence of functions applied to 3D geometric primitives to determine a 2D image--is described in the graphics

  20. Infovis and Statistical Graphics: Different Goals, Different Looks1 Andrew Gelman2

    E-Print Network [OSTI]

    Gelman, Andrew

    1 Infovis and Statistical Graphics: Different Goals, Different Looks1 Andrew Gelman2 and Antony Unwin3 20 Jan 2012 Abstract. The importance of graphical displays in statistical practice has been graphics still occupies an awkward in-between position: Within statistics, exploratory and graphical

  1. Pictures: A simple structured graphics model Sigbjorn Finne and Simon Peyton Jones,

    E-Print Network [OSTI]

    Jones, Simon Peyton

    Pictures: A simple structured graphics model Sigbjorn Finne and Simon Peyton Jones, Department­independent model for de­ scribing two­dimensional graphics using a functional language. Graphical scenes the geometric composition of arbitrary pictures. The structured graphics model presented has been implemented

  2. Using Imported Graphics in L A T E X 2 '' Keith Reckdahl

    E-Print Network [OSTI]

    Stein, William

    Using Imported Graphics in L A T E X 2 '' Keith Reckdahl reckdahl@am­sun2.stanford.edu Version 2.0 December 15, 1997 Summary This document explains how to use imported graphics in L A T E X 2 '' documents A T E X can import virtually any graphics format, Encapsulated PostScript (eps) is the easiest graphics

  3. College of Sciences Paper Number & Title: 159.709 Computer Graphics

    E-Print Network [OSTI]

    Hawick, Ken

    . Recommended books: Computer Graphics Principles and Practice, James Foley, Andries van Dam, Steven Feiner

  4. Passive ice freezing-releasing heat pipe

    DOE Patents [OSTI]

    Gorski, Anthony J. (Lemont, IL); Schertz, William W. (Batavia, IL)

    1982-01-01T23:59:59.000Z

    A heat pipe device has been developed which permits completely passive ice formation and periodic release of ice without requiring the ambient temperature to rise above the melting point of water. This passive design enables the maximum amount of cooling capacity to be stored in the tank.

  5. IceCube Project Monthly Report Accomplishments

    E-Print Network [OSTI]

    Saffman, Mark

    ;3 The latest revised estimates were modified to reflect the anticipated changes resulting from the Raytheon in Raytheon Polar Services completing the IceCube Laboratory. $1 million is from the lagging receipts. The on-ice Integrated Master Schedule is underway and being worked on this week with Raytheon Polar

  6. Parameterizing Size Distribution in Ice Clouds

    SciTech Connect (OSTI)

    DeSlover, Daniel; Mitchell, David L.

    2009-09-25T23:59:59.000Z

    PARAMETERIZING SIZE DISTRIBUTIONS IN ICE CLOUDS David L. Mitchell and Daniel H. DeSlover ABSTRACT An outstanding problem that contributes considerable uncertainty to Global Climate Model (GCM) predictions of future climate is the characterization of ice particle sizes in cirrus clouds. Recent parameterizations of ice cloud effective diameter differ by a factor of three, which, for overcast conditions, often translate to changes in outgoing longwave radiation (OLR) of 55 W m-2 or more. Much of this uncertainty in cirrus particle sizes is related to the problem of ice particle shattering during in situ sampling of the ice particle size distribution (PSD). Ice particles often shatter into many smaller ice fragments upon collision with the rim of the probe inlet tube. These small ice artifacts are counted as real ice crystals, resulting in anomalously high concentrations of small ice crystals (D < 100 µm) and underestimates of the mean and effective size of the PSD. Half of the cirrus cloud optical depth calculated from these in situ measurements can be due to this shattering phenomenon. Another challenge is the determination of ice and liquid water amounts in mixed phase clouds. Mixed phase clouds in the Arctic contain mostly liquid water, and the presence of ice is important for determining their lifecycle. Colder high clouds between -20 and -36 oC may also be mixed phase but in this case their condensate is mostly ice with low levels of liquid water. Rather than affecting their lifecycle, the presence of liquid dramatically affects the cloud optical properties, which affects cloud-climate feedback processes in GCMs. This project has made advancements in solving both of these problems. Regarding the first problem, PSD in ice clouds are uncertain due to the inability to reliably measure the concentrations of the smallest crystals (D < 100 µm), known as the “small mode”. Rather than using in situ probe measurements aboard aircraft, we employed a treatment of ice cloud optical properties formulated in terms of PSD parameters in combination with remote measurements of thermal radiances to characterize the small mode. This is possible since the absorption efficiency (Qabs) of small mode crystals is larger at 12 µm wavelength relative to 11 µm wavelength due to the process of wave resonance or photon tunneling more active at 12 µm. This makes the 12/11 µm absorption optical depth ratio (or equivalently the 12/11 µm Qabs ratio) a means for detecting the relative concentration of small ice particles in cirrus. Using this principle, this project tested and developed PSD schemes that can help characterize cirrus clouds at each of the three ARM sites: SGP, NSA and TWP. This was the main effort of this project. These PSD schemes and ice sedimentation velocities predicted from them have been used to test the new cirrus microphysics parameterization in the GCM known as the Community Climate Systems Model (CCSM) as part of an ongoing collaboration with NCAR. Regarding the second problem, we developed and did preliminary testing on a passive thermal method for retrieving the total water path (TWP) of Arctic mixed phase clouds where TWPs are often in the range of 20 to 130 g m-2 (difficult for microwave radiometers to accurately measure). We also developed a new radar method for retrieving the cloud ice water content (IWC), which can be vertically integrated to yield the ice water path (IWP). These techniques were combined to determine the IWP and liquid water path (LWP) in Arctic clouds, and hence the fraction of ice and liquid water. We have tested this approach using a case study from the ARM field campaign called M-PACE (Mixed-Phase Arctic Cloud Experiment). This research led to a new satellite remote sensing method that appears promising for detecting low levels of liquid water in high clouds typically between -20 and -36 oC. We hope to develop this method in future research.

  7. Theory of ice-skating

    E-Print Network [OSTI]

    Berre, Martine Le

    2015-01-01T23:59:59.000Z

    Almost frictionless skating on ice relies on a thin layer of melted water insulating mechanically the blade of the skate from ice. Using the basic equations of fluid mechanics and Stefan law, we derive a set of two coupled equations for the thickness of the film and the length of contact, a length scale which cannot be taken as its value at rest. The analytical study of these equations allows to define a small a-dimensional parameter depending on the longitudinal coordinate which can be neglected everywhere except close to the contact points at the front and the end of the blade, where a boundary layer solution is given. This solution provides without any calculation the order of magnitude of the film thickness, and its dependence with respect to external parameters like the velocity and mass of the skater and the radius of profile and bite angle of the blade, in good agreement with the numerical study. Moreover this solution also shows that a lubricating water layer of macroscopic thickness always exists for...

  8. Magnetic Monopoles in Spin Ice

    E-Print Network [OSTI]

    Claudio Castelnovo; Roderich Moessner; Shivaji L. Sondhi

    2007-10-31T23:59:59.000Z

    Electrically charged particles, such as the electron, are ubiquitous. By contrast, no elementary particles with a net magnetic charge have ever been observed, despite intensive and prolonged searches. We pursue an alternative strategy, namely that of realising them not as elementary but rather as emergent particles, i.e., as manifestations of the correlations present in a strongly interacting many-body system. The most prominent examples of emergent quasiparticles are the ones with fractional electric charge e/3 in quantum Hall physics. Here we show that magnetic monopoles do emerge in a class of exotic magnets known collectively as spin ice: the dipole moment of the underlying electronic degrees of freedom fractionalises into monopoles. This enables us to account for a mysterious phase transition observed experimentally in spin ice in a magnetic field, which is a liquid-gas transition of the magnetic monopoles. These monopoles can also be detected by other means, e.g., in an experiment modelled after the celebrated Stanford magnetic monopole search.

  9. First data from DM-Ice17

    E-Print Network [OSTI]

    DM-Ice Collaboration; :; J. Cherwinka; D. Grant; F. Halzen; K. M. Heeger; L. Hsu; A. J. F. Hubbard; A. Karle; M. Kauer; V. A. Kudryavtsev; C. Macdonald; R. H. Maruyama; S. Paling; W. Pettus; Z. P. Pierpoint; B. N. Reilly; M. Robinson; P. Sandstrom; N. J. C. Spooner; S. Telfer; L. Yang

    2014-11-13T23:59:59.000Z

    We report the first analysis of background data from DM-Ice17, a direct-detection dark matter experiment consisting of 17 kg of NaI(Tl) target material. It was codeployed with IceCube 2457 m deep in the South Pole glacial ice in December 2010 and is the first such detector operating in the Southern Hemisphere. The background rate in the 6.5 - 8.0 keVee region is measured to be 7.9 +/- 0.4 counts/day/keV/kg. This is consistent with the expected background from the detector assemblies with negligible contributions from the surrounding ice. The successful deployment and operation of DM-Ice17 establishes the South Pole ice as a viable location for future underground, low-background experiments in the Southern Hemisphere. The detector assembly and deployment are described here, as well as the analysis of the DM-Ice17 backgrounds based on data from the first two years of operation after commissioning, July 2011 - June 2013.

  10. First Data from DM-Ice17

    E-Print Network [OSTI]

    :,; Grant, D; Halzen, F; Heeger, K M; Hsu, L; Hubbard, A J F; Karle, A; Kauer, M; Kudryavtsev, V A; Maruyama, R H; MacDonald, C; Paling, S; Pettus, W C; Pierpoint, Z P; Reilly, B N; Robinson, M; Sandstrom, P; Spooner, N J C; Telfer, S; Yang, L

    2014-01-01T23:59:59.000Z

    We report the first analysis of background data from DM-Ice17 a direct-detection dark matter experiment consisting of 17 kg of NaI(Tl) target material. It was successfully deployed 2457 m deep in South Pole glacial ice at the bottom of two IceCube strings in December 2010 and is the first such detector to be operating in the Southern Hemisphere. Data from the first two years of operation after commissioning, July 2011 - June 2013, are presented here. The background rate in the 6.5 - 8.0 kevee region is measured to be 7.9 +/- 0.4 counts/day/keV/kg. This is in agreement with the expected background from the crystal assemblies and is consistent with simulation. Background contributions from the surrounding ice were demonstrated to be negligible. The successful deployment and operation of DM-Ice17 establishes the South Pole ice as a location for future underground, low-background experiments in the Southern Hemisphere. The detector assembly, deployment, and analysis of the DM-Ice17 backgrounds are described.

  11. Modelling Sea Ice Growth Mark J. McGuinness

    E-Print Network [OSTI]

    McGuinness, Mark

    salinity. The saltier the brine, the lower the freezing point. When salinity is above the critical value is rejected by growing ice as a dense brine, but the brine cannot escape as rapidly as heat at the ice, trapping brine in the ice-brine mixture. This constitutional supercooling causes the ice-ocean interface

  12. Introduction Microorganisms in sea ice function ecologically in the

    E-Print Network [OSTI]

    Stewart, Frank

    of the pack via brine drainage, ice melting, or ice break-up (Garrison & Buck 1989 and references thereinIntroduction Microorganisms in sea ice function ecologically in the Antarctic marine ecosystem where pelagic and sea ice habitats are intrinsically coupled (Laws 1985, Garrison 1991, Eicken 1992

  13. FIRST PRINCIPLES MODELING FOR LIDAR SENSING OF COMPLEX ICE SURFACES

    E-Print Network [OSTI]

    Kerekes, John

    FIRST PRINCIPLES MODELING FOR LIDAR SENSING OF COMPLEX ICE SURFACES J. Kerekes, A. Goodenough, S of monitoring the dynamics and mass balance of glaciers, ice caps, and ice sheets. However, it is also known that ice surfaces can have complex 3-dimensional structure, which can challenge their accurate retrieval

  14. ORIGINAL ARTICLE Diatom assemblages promote ice formation in large

    E-Print Network [OSTI]

    Lee Jr., Richard E.

    ORIGINAL ARTICLE Diatom assemblages promote ice formation in large lakes NA D'souza1,3 , Y evidence for the directed formation of ice by planktonic communities dominated by filamentous diatoms sampled from the ice-covered Laurentian Great Lakes. We hypothesize that ice formation promotes attachment

  15. Age characteristics in a multidecadal Arctic sea ice simulation

    SciTech Connect (OSTI)

    Hunke, Elizabeth C [Los Alamos National Laboratory; Bitz, Cecllia M [UNIV. OF WASHINGTON

    2008-01-01T23:59:59.000Z

    Results from adding a tracer for age of sea ice to a sophisticated sea ice model that is widely used for climate studies are presented. The consistent simulation of ice age, dynamics, and thermodynamics in the model shows explicitly that the loss of Arctic perennial ice has accelerated in the past three decades, as has been seen in satellite-derived observations. Our model shows that the September ice age average across the Northern Hemisphere varies from about 5 to 8 years, and the ice is much younger (about 2--3 years) in late winter because of the expansion of first-year ice. We find seasonal ice on average comprises about 5% of the total ice area in September, but as much as 1.34 x 10{sup 6} km{sup 2} survives in some years. Our simulated ice age in the late 1980s and early 1990s declined markedly in agreement with other studies. After this period of decline, the ice age began to recover, but in the final years of the simulation very little young ice remains after the melt season, a strong indication that the age of the pack will again decline in the future as older ice classes fail to be replenished. The Arctic ice pack has fluctuated between older and younger ice types over the past 30 years, while ice area, thickness, and volume all declined over the same period, with an apparent acceleration in the last decade.

  16. Dynamics of Ice Nucleation on Water Repellent Surfaces Azar Alizadeh,*,

    E-Print Network [OSTI]

    Dhinojwala, Ali

    for nonicing applications. 1. INTRODUCTION Ice accretion on surfaces of aircraft, wind turbine blades, oil

  17. Learning Structural Changes of Gaussian Graphical Models in Controlled Experiments

    E-Print Network [OSTI]

    Zhang, Bai

    2012-01-01T23:59:59.000Z

    Graphical models are widely used in scienti fic and engineering research to represent conditional independence structures between random variables. In many controlled experiments, environmental changes or external stimuli can often alter the conditional dependence between the random variables, and potentially produce significant structural changes in the corresponding graphical models. Therefore, it is of great importance to be able to detect such structural changes from data, so as to gain novel insights into where and how the structural changes take place and help the system adapt to the new environment. Here we report an effective learning strategy to extract structural changes in Gaussian graphical model using l1-regularization based convex optimization. We discuss the properties of the problem formulation and introduce an efficient implementation by the block coordinate descent algorithm. We demonstrate the principle of the approach on a numerical simulation experiment, and we then apply the algorithm to...

  18. A graphical electromagnetic simulation laboratory for power systems engineering programs

    SciTech Connect (OSTI)

    Gole, A.M. [Univ. of Manitoba, Winnipeg, Manitoba (Canada)] [Univ. of Manitoba, Winnipeg, Manitoba (Canada); Nayak, O.B. [Manitoba HVDC Research Centre, Winnipeg, Manitoba (Canada)] [Manitoba HVDC Research Centre, Winnipeg, Manitoba (Canada); Sidhu, T.S.; Sachdev, M.S. [Univ. of Saskatchewan, Saskatoon, Saskatchewan (Canada)] [Univ. of Saskatchewan, Saskatoon, Saskatchewan (Canada)

    1996-05-01T23:59:59.000Z

    The recent availability of Electromagnetic Transient Programs with graphical front ends now makes it possible to put together models for circuits and systems in a manner similar to the connection of components in a laboratory. In the past, the non-graphical EMT Programs required considerable expertise in their use and thus distracted the students into the details or simulation. The introduction of a graphical simulation based laboratory into Undergraduate and Graduate Engineering Programs is presented, based on the PSCAD/EMTDC program. The philosophy behind the design of suitable example cases is presented within the framework of an Undergraduate Power Electronics Course, an HVdc Transmission Course and a course on Power System Protection.

  19. Self-excited oscillations in sea ice and evaluation of the ice forces

    SciTech Connect (OSTI)

    Smirnov, V.N. [Arctic and Antarctic Research Inst., St. Petersburg (Russian Federation)

    1996-12-01T23:59:59.000Z

    The processes of the dynamical interactions of the ice are described. Special attention is given to the self-excited oscillating processes when the ice goes through periodical deformations similar to these which appear in the structures in the sea ice. The range of the self-excited oscillations periods is from 0.1 s to 20 s. The jump-like processes transform themselves into the quasi-harmonical ones up to sound frequency range. For comparison purposes the spectra of the frictional self-excited oscillations in the glaciers are presented. An iceberg interacting with the drifting ice also forms self-excited oscillating system with period of up to 10 s. An example of numerical evaluation of the forces of interaction between a drifting ice island and the sea ice is given.

  20. Density-fitted singles and doubles coupled cluster on graphics processing units

    SciTech Connect (OSTI)

    Sherrill, David [Georgia Institute of Technology, Atlanta] [Georgia Institute of Technology, Atlanta; Sumpter, Bobby G [ORNL] [ORNL; DePrince, III, A. Eugene [Georgia Institute of Technology, Atlanta

    2014-01-01T23:59:59.000Z

    We adapt an algorithm for singles and doubles coupled cluster (CCSD) that uses density fitting (DF) or Cholesky decomposition (CD) in the construction and contraction of all electron repulsion integrals (ERI s) for use on heterogeneous compute nodes consisting of a multicore CPU and at least one graphics processing unit (GPU). The use of approximate 3-index ERI s ameliorates two of the major difficulties in designing scientific algorithms for GPU s: (i) the extremely limited global memory on the devices and (ii) the overhead associated with data motion across the PCI bus. For the benzene trimer described by an aug-cc-pVDZ basis set, the use of a single NVIDIA Tesla C2070 (Fermi) GPU accelerates a CD-CCSD computation by a factor of 2.1, relative to the multicore CPU-only algorithm that uses 6 highly efficient Intel core i7-3930K CPU cores. The use of two Fermis provides an acceleration of 2.89, which is comparable to that observed when using a single NVIDIA Kepler K20c GPU (2.73).

  1. RGPS/Model Ice Deformation July 3, 2003 1 Sea Ice Deformation Rates From Satellite Measurements and in a Model

    E-Print Network [OSTI]

    Lindsay, Ron

    of the Arctic geophysical environment. The deformation rate of pack ice, determined from the spatial gradientsRGPS/Model Ice Deformation July 3, 2003 1 Sea Ice Deformation Rates From Satellite Measurements The deformation of sea ice is an important element of the Arctic climate system because of its influence

  2. Communication: On the stability of ice 0, ice i, and I h D. Quigley, D. Alf, and B. Slater

    E-Print Network [OSTI]

    Alfè, Dario

    Communication: On the stability of ice 0, ice i, and I h D. Quigley, D. Alfè, and B. Slater (2014) Communication: On the stability of ice 0, ice i, and Ih D. Quigley,1,a) D. Alfè,2 and B. Slater3

  3. ice-surface lowering or some regional climate change induced by ice-surface lowering. If attributed solely to a

    E-Print Network [OSTI]

    Flint-Garcia, Sherry

    ice-surface lowering or some regional climate change induced by ice-surface lowering. If attributed solely to a change in ice-surface elevation, the 3° to 4°C warming at Siple Dome (16) would indicate 500 to 650 m of ice-surface lowering, assuming a free atmospheric lapse rate of 6°C per 1000 m

  4. Inter-annual sea-ice dynamics and micro-algal biomass in winter pack ice of Marguerite Bay, Antarctica

    E-Print Network [OSTI]

    Stewart, Frank

    in this region (Stammerjohn et al., 2003; Stammerjohn and Smith, 1996). Changes in mesoscale ice dynamics

  5. Electromagnetic pump stator core

    DOE Patents [OSTI]

    Fanning, Alan W. (San Jose, CA); Olich, Eugene E. (Aptos, CA); Dahl, Leslie R. (Livermore, CA)

    1995-01-01T23:59:59.000Z

    A stator core for supporting an electrical coil includes a plurality of groups of circumferentially abutting flat laminations which collectively form a bore and perimeter. A plurality of wedges are interposed between the groups, with each wedge having an inner edge and a thicker outer edge. The wedge outer edges abut adjacent ones of the groups to provide a continuous path around the perimeter.

  6. Analysis of core samples from the BPXA-DOE-USGS Mount Elbert gas hydrate stratigraphic test well: Insights into core disturbance and handling

    SciTech Connect (OSTI)

    Kneafsey, Timothy J.; Lu, Hailong; Winters, William; Boswell, Ray; Hunter, Robert; Collett, Timothy S.

    2009-09-01T23:59:59.000Z

    Collecting and preserving undamaged core samples containing gas hydrates from depth is difficult because of the pressure and temperature changes encountered upon retrieval. Hydrate-bearing core samples were collected at the BPXA-DOE-USGS Mount Elbert Gas Hydrate Stratigraphic Test Well in February 2007. Coring was performed while using a custom oil-based drilling mud, and the cores were retrieved by a wireline. The samples were characterized and subsampled at the surface under ambient winter arctic conditions. Samples thought to be hydrate bearing were preserved either by immersion in liquid nitrogen (LN), or by storage under methane pressure at ambient arctic conditions, and later depressurized and immersed in LN. Eleven core samples from hydrate-bearing zones were scanned using x-ray computed tomography to examine core structure and homogeneity. Features observed include radial fractures, spalling-type fractures, and reduced density near the periphery. These features were induced during sample collection, handling, and preservation. Isotopic analysis of the methane from hydrate in an initially LN-preserved core and a pressure-preserved core indicate that secondary hydrate formation occurred throughout the pressurized core, whereas none occurred in the LN-preserved core, however no hydrate was found near the periphery of the LN-preserved core. To replicate some aspects of the preservation methods, natural and laboratory-made saturated porous media samples were frozen in a variety of ways, with radial fractures observed in some LN-frozen sands, and needle-like ice crystals forming in slowly frozen clay-rich sediments. Suggestions for hydrate-bearing core preservation are presented.

  7. The Phases of Water Ice in the Solar Nebula

    E-Print Network [OSTI]

    Ciesla, Fred J

    2014-01-01T23:59:59.000Z

    Understanding the phases of water ice that were present in the solar nebula has implications for understanding cometary and planetary compositions as well as internal evolution of these bodies. Here we show that amorphous ice formed more readily than previously recognized, with formation at temperatures ice to form. This processing would be a natural consequence of ice dynamics, and would allow for the trapping of noble gases and other volatiles in water ice in the outer solar nebula.

  8. Graphical functions and single-valued multiple polylogarithms

    E-Print Network [OSTI]

    Oliver Schnetz

    2014-11-11T23:59:59.000Z

    Graphical functions are single-valued complex functions which arise from Feynman amplitudes. We study their properties and use their connection to multiple polylogarithms to calculate Feynman periods. For the zig-zag and two more families of phi^4 periods we give exact results modulo products. These periods are proved to be expressible as integer linear combinations of single-valued multiple polylogarithms evaluated at one. For the larger family of 'constructible' graphs we give an algorithm that allows one to calculate their periods by computer algebra. The theory of graphical functions is used to prove the zig-zag conjecture.

  9. Ice Sheets: Byrd Polar Outreach & Education February & March 2014 I would like to begin this month's newsletter with a word of thanks. About three weeks ago, I

    E-Print Network [OSTI]

    Howat, Ian M.

    was the recipient of a generous donation from Betsy Salt and her brother Jeffrey Salt in honor of their father on tours. The donation from the Salt family will allow us to install a first-rate station on the roof. Lastly, BPRC created a mobile exhibit on the ice core drilling program that we will take to Westerville

  10. Observations of the Askaryan Effect in Ice

    SciTech Connect (OSTI)

    Gorham, P.W.

    2007-01-16T23:59:59.000Z

    We report on the first observations of the Askaryan effect in ice: coherent impulsive radio Cherenkov radiation from the charge asymmetry in an electromagnetic (EM) shower. Such radiation has been observed in silica sand and rock salt, but this is the first direct observation from an EM shower in ice. These measurements are important since the majority of experiments to date that rely on the effect for ultra-high energy neutrino detection are being performed using ice as the target medium. As part of the complete validation process for the Antarctic Impulsive Transient Antenna (ANITA) experiment, we performed an experiment at the Stanford Linear Accelerator Center (SLAC) in June 2006 using a 7.5 metric ton ice target, yielding results fully consistent with theoretical expectations.

  11. Neutrino Oscillation Measurements with IceCube

    E-Print Network [OSTI]

    Carsten Rott; for the IceCube Collaboration

    2008-10-20T23:59:59.000Z

    We present preliminary results for a neutrino oscillation analysis in progress on data collected with the IceCube 22-string detector during 2007 and 2008. The goal of this analysis is to measure muon neutrino disappearance as a function of energy for a constant baseline length of the diameter of the Earth by studying vertically up-going muon neutrinos. At this baseline disappearance effects are expected to become sizable at neutrino energies below 100 GeV. This energy range has not been previously explored with IceCube, however due to IceCube's vertical geometry there is some sensitivity for this specific class of events. Based on preliminary selection criteria, we show that IceCube has the potential to detect these events and we estimate the sensitivity to determining oscillation parameters.

  12. Scattering Properties of Oriented Hexagonal Ice Crystals

    E-Print Network [OSTI]

    Zhang, Feng

    2010-01-14T23:59:59.000Z

    To interpret the data from spaceborn lidar measurements, one must have a basic understanding of the backscattering of oriented ice particles. The conventional raytracing method is not applicable to the scattering of light by oriented particles...

  13. Observations of the Askaryan Effect in Ice

    E-Print Network [OSTI]

    ANITA collaboration; P. W. Gorham; S. W. Barwick; J. J. Beatty; D. Z. Besson; W. R. Binns; C. Chen; P. Chen; J. M. Clem; A. Connolly; P. F. Dowkontt; M. A. DuVernois; R. C. Field; D. Goldstein; A. Goodhue; C. Hast; C. L. Hebert; S. Hoover; M. H. Israel; J. Kowalski; J. G. Learned; K. M. Liewer; J. T. Link; E. Lusczek; S. Matsuno; B. Mercurio; C. Miki; P. Miocinovic; J. Nam; C. J. Naudet; J. Ng; R. Nichol; K. Palladino; K. Reil; A. Romero-Wolf; M. Rosen; D. Saltzberg; D. Seckel; G. S. Varner; D. Walz; F. Wu

    2007-01-12T23:59:59.000Z

    We report on the first observations of the Askaryan effect in ice: coherent impulsive radio Cherenkov radiation from the charge asymmetry in an electromagnetic (EM) shower. Such radiation has been observed in silica sand and rock salt, but this is the first direct observation from an EM shower in ice. These measurements are important since the majority of experiments to date that rely on the effect for ultra-high energy neutrino detection are being performed using ice as the target medium. As part of the complete validation process for the Antarctic Impulsive Transient Antenna (ANITA) experiment, we performed an experiment at the Stanford Linear Accelerator Center (SLAC) in June 2006 using a 7.5 metric ton ice target, yielding results fully consistent with theoretical expectations.

  14. Observations of the Askaryan Effect in Ice

    E-Print Network [OSTI]

    Barwick, S W; Besson, D Z; Binns, W R; Chen, P; Clem, J M; Connolly, A; Dowkontt, P F; Duvernois, M A; Field, R C; Goldstein, D; Goodhue, A; Gorham, P W; Hast, C; Hebert, C L; Hoover, S; Israel, M H; Kowalski, J; Learned, J G; Liewer, K M; Link, J T; Lusczek, E; Matsuno, S; Mercurio, B; Miki, C; Miocinovic, P; Nam, J; Naudet, C J; Ng, J; Nichol, R; Palladino, K J; Reil, K; Romero-Wolf, A; Rosen, M; Saltzberg, D; Secke, D; Varner, G S; Walz, D; Wu, F

    2006-01-01T23:59:59.000Z

    We report on the first observations of the Askaryan effect in ice: coherent impulsive radio Cherenkov radiation from the charge asymmetry in an electromagnetic (EM) shower. Such radiation has been observed in silica sand and rock salt, but this is the first direct observation from an EM shower in ice. These measurements are important since the majority of experiments to date that rely on the effect for ultra-high energy neutrino detection are being performed using ice as the target medium. As part of the complete validation process for the Antarctic Impulsive Transient Antenna (ANITA) experiment, we performed an experiment at the Stanford Linear Accelerator Center (SLAC) in June 2006 using a 7.5 metric ton ice target, yielding results fully consistent with theoretical expectations.

  15. Weakening of ice by magnesium perchlorate hydrate

    E-Print Network [OSTI]

    Lenferink, Hendrik J., 1985-

    2012-01-01T23:59:59.000Z

    I show that perchlorate hydrates, which have been indirectly detected at high Martian circumpolar latitudes by the Phoenix Mars Lander, have a dramatic effect upon the rheological behavior of polycrystalline water ice under ...

  16. Measurement of the Atmospheric $?_e$ flux in IceCube

    E-Print Network [OSTI]

    IceCube Collaboration; M. G. Aartsen; R. Abbasi; Y. Abdou; M. Ackermann; J. Adams; J. A. Aguilar; M. Ahlers; D. Altmann; K. Andeen; J. Auffenberg; X. Bai; M. Baker; S. W. Barwick; V. Baum; R. Bay; K. Beattie; J. J. Beatty; S. Bechet; J. Becker Tjus; K. -H. Becker; M. Bell; M. L. Benabderrahmane; S. BenZvi; J. Berdermann; P. Berghaus; D. Berley; E. Bernardini; D. Bertrand; D. Z. Besson; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; S. Bohaichuk; C. Bohm; D. Bose1; S. Boser; O. Botner; L. Brayeur; A. M. Brown; R. Bruijn; J. Brunner; S. Buitink; M. Carson; J. Casey; M. Casier; D. Chirkin; B. Christy; K. Clark; F. Clevermann; S. Cohen; D. F. Cowen; A. H. Cruz Silva; M. Danninger; J. Daughhetee; J. C. Davis; C. De Clercq; S. De Ridder; F. Descamps; P. Desiati; G. de Vries-Uiterweerd; T. DeYoung; J. C. Diaz-Velez; J. Dreyer; J. P. Dumm; M. Dunkman; R. Eagan; B. Eberhardt; J. Eisch; R. W. Ellsworth; O. Engdegard; S. Euler; P. A. Evenson; O. Fadiran; A. R. Fazely; A. Fedynitch; J. Feintzeig; T. Feusels; K. Filimonov; C. Finley; T. Fischer-Wasels; S. Flis; A. Franckowiak; R. Franke; K. Frantzen; T. Fuchs; T. K. Gaisser; J. Gallagher; L. Gerhardt; L. Gladstone; T. Glusenkamp; A. Goldschmidt; G. Golup; J. A. Goodman; D. Gora; D. Grant; A. Gross; S. Grullon; M. Gurtner; C. Ha; A. Haj Ismail; A. Hallgren; F. Halzen; K. Hanson; D. Heereman; P. Heimann; D. Heinen; K. Helbing; R. Hellauer; S. Hickford; G. C. Hill; K. D. Hoffman; R. Hoffmann; A. Homeier; K. Hoshina; W. Huelsnitz; P. O. Hulth; K. Hultqvist; S. Hussain; A. Ishihara; E. Jacobi; J. Jacobsen; G. S. Japaridze; O. Jlelati; A. Kappes; T. Karg; A. Karle; J. Kiryluk; F. Kislat; J. Klas; S. R. Klein; J. -H. Kohne; G. Kohnen; H. Kolanoski; L. Kopke; C. Kopper; S. Kopper; D. J. Koskinen; M. Kowalski; M. Krasberg; G. Kroll; J. Kunnen; N. Kurahashi; T. Kuwabara; M. Labare; H. Landsman; M. J. Larson; R. Lauer; M. Lesiak-Bzdak; J. Lunemann; J. Madsen; R. Maruyama; K. Mase; H. S. Matis; F. McNally; K. Meagher; M. Merck; P. Meszaros; T. Meures; S. Miarecki; E. Middell; N. Milke; J. Miller; L. Mohrmann; T. Montaruli; R. Morse; R. Nahnhauer; U. Naumann; S. C. Nowicki; D. R. Nygren; A. Obertacke; S. Odrowski; A. Olivas; M. Olivo; A. O'Murchadha; S. Panknin; L. Paul; J. A. Pepper; C. Perez de los Heros; D. Pieloth; N. Pirk; J. Posselt; P. B. Price; G. T. Przybylski; L. Radel; K. Rawlins; P. Redl; E. Resconi; W. Rhode; M. Ribordy; M. Richman; B. Riedel; J. P. Rodrigues; C. Rott; T. Ruhe; B. Ruzybayev; D. Ryckbosch; S. M. Saba; T. Salameh; H. -G. Sander; M. Santander; S. Sarkar; K. Schatto; M. Scheel; F. Scheriau; T. Schmidt; M. Schmitz; S. Schoenen; S. Schoneberg; L. Schonherr; A. Schonwald; A. Schukraft; L. Schulte; O. Schulz; D. Seckel; S. H. Seo; Y. Sestayo; S. Seunarine; C. Sheremata; M. W. E. Smith; M. Soiron; D. Soldin; G. M. Spiczak; C. Spiering; M. Stamatikos; T. Stanev; A. Stasik; T. Stezelberger; R. G. Stokstad; A. Stoss; E. A. Strahler; R. Strom; G. W. Sullivan; H. Taavola; I. Taboada; A. Tamburro; S. Ter-Antonyan; S. Tilav; P. A. Toale; S. Toscano; M. Usner; D. van der Drift; N. van Eijndhoven; A. Van Overloop; J. van Santen; M. Vehring; M. Voge1; M. Vraeghe; C. Walck; T. Waldenmaier; M. Wallraff; M. Walter; R. Wasserman; Ch. Weaver; C. Wendt; S. Westerhoff; N. Whitehorn; K. Wiebe; C. H. Wiebusch; D. R. Williams; H. Wissing; M. Wolf; T. R. Wood; K. Woschnagg; C. Xu; D. L. Xu; X. W. Xu; J. P. Yanez; G. Yodh; S. Yoshida; P. Zarzhitsky; J. Ziemann; S. Zierke; A. Zilles; M. Zoll

    2013-03-22T23:59:59.000Z

    We report the first measurement of the atmospheric electron neutrino flux in the energy range between approximately 80 GeV and 6 TeV, using data recorded during the first year of operation of IceCube's DeepCore low energy extension. Techniques to identify neutrinos interacting within the DeepCore volume and veto muons originating outside the detector are demonstrated. A sample of 1029 events is observed in 281 days of data, of which 496 $\\pm$ 66(stat.) $\\pm$ 88(syst.) are estimated to be cascade events, including both electron neutrino and neutral current events. The rest of the sample includes residual backgrounds due to atmospheric muons and charged current interactions of atmospheric muon neutrinos. The flux of the atmospheric electron neutrinos is consistent with models of atmospheric neutrinos in this energy range. This constitutes the first observation of electron neutrinos and neutral current interactions in a very large volume neutrino telescope optimized for the TeV energy range.

  17. J.M. Ogden | E.H. Adelson | J R. Bergen | P.J. Burt Pyramid-based computer graphics

    E-Print Network [OSTI]

    Adelson, Edward

    J.M. Ogden | E.H. Adelson | J R. Bergen | P.J. Burt Pyramid-based computer graphics Pyramid-based graphics techniques can provide realistic computer graphics on small systems without the complexities of physics simulations. Human beings have an intuitive feel for graphics. Graphics problems such as blending

  18. Bedmap2: improved ice bed, surface and thickness datasets for Antarctica

    E-Print Network [OSTI]

    2013-01-01T23:59:59.000Z

    Subglacial topography inferred from ice surface ter- rainSubglacial topography inferred from ice surface ter- rainsurface eleva- tion, ice thickness and subglacial topography

  19. Spread of ice mass loss into northwest Greenland observed by GRACE and GPS

    E-Print Network [OSTI]

    Khan, Shfaqat Abbas; Wahr, John; Bevis, Michael; Velicogna, Isabella; Kendrick, Eric

    2010-01-01T23:59:59.000Z

    oscillations and seasonal ice mass fluctuations, Eos Trans.2007), Rapid changes in ice discharge from Greenland outletW. et al. (2004), Greenland Ice Sheet: Increased coastal

  20. Regelation: why does ice melt under pressure?

    E-Print Network [OSTI]

    Chang Q Sun

    2015-01-28T23:59:59.000Z

    Unlike other unusual materials whose bonds contract under compression, the O:H nonbond undergoes contraction and the H-O bond elongation towards O:H and H-O length symmetry in water and ice. The energy drop of the H-O bond dictates the melting point Tm depression of ice. Once the pressure is relieved, the O:H-O bond fully recovers its initial state, resulting in Regelation.

  1. Regelation: why does ice melt under pressure?

    E-Print Network [OSTI]

    Sun, Chang Q

    2015-01-01T23:59:59.000Z

    Unlike other unusual materials whose bonds contract under compression, the O:H nonbond undergoes contraction and the H-O bond elongation towards O:H and H-O length symmetry in water and ice. The energy drop of the H-O bond dictates the melting point Tm depression of ice. Once the pressure is relieved, the O:H-O bond fully recovers its initial state, resulting in Regelation.

  2. Development of a Mobile Ice Nucleus Counter

    SciTech Connect (OSTI)

    Kok, Gregory; Kulkarni, Gourihar

    2014-07-10T23:59:59.000Z

    An ice nucleus counter has been constructed. The instrument uses built-in refrigeration systems for wall cooling. A cascade refrigeration system will allow the cold wall to operate as low as -70 deg C, and a single stage system can operate the warm wall at -45 deg C. A unique optical particle counter has been constructed using polarization detection of the scattered light. This allows differentiation of the particles exiting the chamber to determine if they are ice or liquid.

  3. Singular value decomposition utilizing parallel algorithms on graphical processors

    SciTech Connect (OSTI)

    Kotas, Charlotte W [ORNL; Barhen, Jacob [ORNL

    2011-01-01T23:59:59.000Z

    One of the current challenges in underwater acoustic array signal processing is the detection of quiet targets in the presence of noise. In order to enable robust detection, one of the key processing steps requires data and replica whitening. This, in turn, involves the eigen-decomposition of the sample spectral matrix, Cx = 1/K xKX(k)XH(k) where X(k) denotes a single frequency snapshot with an element for each element of the array. By employing the singular value decomposition (SVD) method, the eigenvectors and eigenvalues can be determined directly from the data without computing the sample covariance matrix, reducing the computational requirements for a given level of accuracy (van Trees, Optimum Array Processing). (Recall that the SVD of a complex matrix A involves determining V, , and U such that A = U VH where U and V are orthonormal and is a positive, real, diagonal matrix containing the singular values of A. U and V are the eigenvectors of AAH and AHA, respectively, while the singular values are the square roots of the eigenvalues of AAH.) Because it is desirable to be able to compute these quantities in real time, an efficient technique for computing the SVD is vital. In addition, emerging multicore processors like graphical processing units (GPUs) are bringing parallel processing capabilities to an ever increasing number of users. Since the computational tasks involved in array signal processing are well suited for parallelization, it is expected that these computations will be implemented using GPUs as soon as users have the necessary computational tools available to them. Thus, it is important to have an SVD algorithm that is suitable for these processors. This work explores the effectiveness of two different parallel SVD implementations on an NVIDIA Tesla C2050 GPU (14 multiprocessors, 32 cores per multiprocessor, 1.15 GHz clock - peed). The first algorithm is based on a two-step algorithm which bidiagonalizes the matrix using Householder transformations, and then diagonalizes the intermediate bidiagonal matrix through implicit QR shifts. This is similar to that implemented for real matrices by Lahabar and Narayanan ("Singular Value Decomposition on GPU using CUDA", IEEE International Parallel Distributed Processing Symposium 2009). The implementation is done in a hybrid manner, with the bidiagonalization stage done using the GPU while the diagonalization stage is done using the CPU, with the GPU used to update the U and V matrices. The second algorithm is based on a one-sided Jacobi scheme utilizing a sequence of pair-wise column orthogonalizations such that A is replaced by AV until the resulting matrix is sufficiently orthogonal (that is, equal to U ). V is obtained from the sequence of orthogonalizations, while can be found from the square root of the diagonal elements of AH A and, once is known, U can be found from column scaling the resulting matrix. These implementations utilize CUDA Fortran and NVIDIA's CUB LAS library. The primary goal of this study is to quantify the comparative performance of these two techniques against themselves and other standard implementations (for example, MATLAB). Considering that there is significant overhead associated with transferring data to the GPU and with synchronization between the GPU and the host CPU, it is also important to understand when it is worthwhile to use the GPU in terms of the matrix size and number of concurrent SVDs to be calculated.

  4. First Results from IceCube

    E-Print Network [OSTI]

    Spencer R. Klein; for the IceCube Collaboration

    2006-01-12T23:59:59.000Z

    IceCube is a 1 km$^3$ neutrino observatory being built to study neutrino production in active galactic nuclei, gamma-ray bursts, supernova remnants, and a host of other astrophysical sources. High-energy neutrinos may signal the sources of ultra-high energy cosmic rays. IceCube will also study many particle-physics topics: searches for WIMP annihilation in the Earth or the Sun, and for signatures of supersymmetry in neutrino interactions, studies of neutrino properties, including searches for extra dimensions, and searches for exotica such as magnetic monopoles or Q-balls. IceCube will also study the cosmic-ray composition. In January, 2005, 60 digital optical modules (DOMs) were deployed in the South Polar ice at depths ranging from 1450 to 2450 meters, and 8 ice-tanks, each containing 2 DOMs were deployed as part of a surface air-shower array. All 76 DOMs are collecting high-quality data. After discussing the IceCube physics program and hardware, I will present some initial results with the first DOMs.

  5. EUROGRAPHICS 2008 Education Papers Computer Graphics: Problem Based Learning and

    E-Print Network [OSTI]

    Baldassarri, Sandra

    Abstract This paper focuses on the use of new tools in order to improve the learning of Computer Graphics. By combining these ideas, we obtain an interactive learning environment created to improve student's learning at the birth of an interactive learning environment created to improve student's learning capabilities. The use

  6. Compression of Computer Graphics Images with Image-Based Rendering

    E-Print Network [OSTI]

    Shahabi, Cyrus

    Compression of Computer Graphics Images with Image-Based Rendering Ilmi Yoon and Ulrich Neumann information from previously rendered images. Images predicted from prior images are combined with a residual-based rendering tech- nique provides accurate motion prediction and accelerates rendering at the same time

  7. Graphics Hardware (2007) Timo Aila and Mark Segal (Editors)

    E-Print Network [OSTI]

    Skadron, Kevin

    2007-01-01T23:59:59.000Z

    into this non-graphics, one-time niche market. Major supercomputing installations are building GPGPU clusters detecting an error, the system invokes an automatic recovery mechanism that only recomputes erroneous that drive the market. 1. Introduction Exponential device scaling has produced incredible ad- vances

  8. Graphics Hardware (2008) David Luebke and John D. Owens (Editors)

    E-Print Network [OSTI]

    Tsigas, Philippas

    2008-01-01T23:59:59.000Z

    to the graphics processor domain. We have compared four different dynamic load balancing methods to see which one from the shared data object. As long as the tasks are sufficiently fine-grained the work load will be balanced between processing units. The methods used for synchronizing the memory accesses to these shared

  9. CSCI 480 Computer Graphics, Spring 2011 Administrative Matters

    E-Print Network [OSTI]

    Southern California, University of

    CSCI 480 Computer Graphics, Spring 2011 Administrative Matters Spring 2011, Mon and Wed, 10 24 Transformations Ch 4 Wed Jan 26 Viewing and Projection Ch 5 Mon Jan 31 Hierarchical Modeling Ch 10, Publisher: Addison Wesley, ISBN: 9780321535863 Dave Shreiner: OpenGL Programming Guide: The Official Guide

  10. Email Archive Analysis Through Graphical Visualization Columbia University

    E-Print Network [OSTI]

    Yang, Junfeng

    Email Archive Analysis Through Graphical Visualization Wei-Jen Li Columbia University weijen@cs.columbia.edu Shlomo Hershkop Columbia University shlomo@cs.columbia.edu Salvatore J. Stolfo Columbia University sal@cs.columbia (EMT) developed at Columbia University [3] is a data mining system that computes behavior profiles

  11. Graphical language for identification of control strategies allowing Demand Response

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Graphical language for identification of control strategies allowing Demand Response David DA SILVA. This will allow the identification of the electric appliance availability for demand response control strategies to be implemented in terms of demand response for electrical appliances. Introduction An important part

  12. Maritime Threat Detection Using Probabilistic Graphical Models Bryan Auslander1

    E-Print Network [OSTI]

    Gupta, Kalyan Moy

    Maritime Threat Detection Using Probabilistic Graphical Models Bryan Auslander1 , Kalyan Moy Gupta1.lastname@knexusresearch.com | david.aha@nrl.navy.mil Abstract Maritime threat detection is a challenging problem because maritime them on a threat recognition task using track data obtained from force protection naval exercises

  13. Breakthrough Technologies Leaf Extraction and Analysis Framework Graphical User

    E-Print Network [OSTI]

    Weitz, Joshua S.

    : Segmenting and Analyzing the Structure of Leaf Veins and Areoles1[W][OA] Charles A. Price*, Olga Symonova and Analysis Framework Graphical User Interface (LEAF GUI), a user-assisted software tool that facilitates software promises to facilitate improved understanding of the adaptive and ecological significance of leaf

  14. EUROGRAPHICS 2002 Tutorial Geometric Data Structures for Computer Graphics

    E-Print Network [OSTI]

    Behnke, Sven

    EUROGRAPHICS 2002 Tutorial Geometric Data Structures for Computer Graphics Gabriel Zachmann Association 2002. #12;2 Zachmann and Langetepe / Geometric Data Structures for CG Contents 1 Introduction 2 Association 2002. #12;Zachmann and Langetepe / Geometric Data Structures for CG 3 Abstract The goal

  15. EUROGRAPHICS 2002 Tutorial Geometric Data Structures for Computer Graphics

    E-Print Network [OSTI]

    Klein, Rolf

    EUROGRAPHICS 2002 Tutorial Geometric Data Structures for Computer Graphics Gabriel Zachmann Association 2002. #12; Zachmann and Langetepe / Geometric Data Structures for CG Contents 1 Introduction 2 © The Eurographics Association 2002. #12; Zachmann and Langetepe / Geometric Data Structures for CG Abstract

  16. Geometric Data Structures for Computer Graphics Gabriel Zachmann & Elmar Langetepe

    E-Print Network [OSTI]

    Behnke, Sven

    Geometric Data Structures for Computer Graphics Gabriel Zachmann & Elmar Langetepe Informatik II://cg.cs.uni-bonn.de/course/ #12;2 Zachmann/Langetepe: Geometric Data Structures for CG Prerequisites Participants of this course. Component 1. Introduction Introduction ­ Zachmann/Langetepe. Component 2. Quadtree/Octree Construction

  17. Level Set and PDE Methods for Computer Graphics

    E-Print Network [OSTI]

    Level Set and PDE Methods for Computer Graphics Notes for SIGGRAPH 2004 Course #27 Los Angeles, CA will describe the numerical methods and algorithms needed to actually implement the mathematics and methods.D. in Computer and Systems Engineering (Rensselaer Polytechnic Institute, 1993). E-mail: david

  18. Ninth Annual Report IntcrnctiYe Graphics for

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    ) Transported to VAX Computer Our local CR,P·7a molecular graphics syslern, which h:t~ been extensively usud Cor:NJX operating $ystem on lhe Dt.:C VAX com- puler". ~lost of lhc system now works and 1l can be u;cd on V.\\X-11

  19. THREE-DIMENSIONAL CUES FOR A ~OLECULAR COMPUTER GRAPHICS SYSTEM

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    is a part. He and Dr. Victor L. Wallace advised my work. Other members of my committee, Dr. James D. Foley. Brooks, Jr. Reader: H. Fuchs Reader.: W. V. Wright P. Calingaert D. L. Parnas #12;@ 1979 JAMES SARGENTTHREE-DIMENSIONAL CUES FOR A ~OLECULAR COMPUTER GRAPHICS SYSTEM by James Sargent Lipscomb TR 79

  20. Graphical modelling of process algebras with Stephen Gilmore

    E-Print Network [OSTI]

    Gilmore, Stephen

    Graphical modelling of process algebras with DrawNET Stephen Gilmore Laboratory for Foundations languages of process algebras and other state-based modelling formalisms. We have extended the DrawNET modelling tool to facilitate the design of PEPA net models [1] in addition to its existing support for Petri

  1. The TV Turtle A Logo Graphics System for Raster Displays

    E-Print Network [OSTI]

    Lieberman, Henry

    -like interactive programming language designed for use by kids, and is based on Logo's turtle geometry approach for interactive graphics than the conventional approach using absolute cartesian coordinates, and its mathematical]. The same turtle commands can also be used to control a robot turtle, which draws pictures on the floor

  2. Producing EGS4 shower displays with the Unified Graphics System

    SciTech Connect (OSTI)

    Cowan, R.F. (Massachusetts Inst. of Tech., Cambridge, MA (USA). Lab. for Nuclear Science); Nelson, W.R. (Stanford Linear Accelerator Center, Menlo Park, CA (USA))

    1990-08-16T23:59:59.000Z

    The EGS4 Code System has been coupled with the SLAC Unified Graphics System in such a manner as to provide a means for displaying showers on UGS77-supported devices. This is most easily accomplished by attaching an auxiliary subprogram package (SHOWGRAF) to existing EGS4 User Codes and making use of a graphics display or a post-processor code called EGS4PL. SHOWGRAF may be used to create shower displays directly on interactive IBM 5080 color display devices, supporting three-dimensional rotations, translations, and zoom features, and providing illustration of particle types and energies by color and/or intensity. Alternatively, SHOWGRAF may be used to record a two-dimensional projection of the shower in a device-independent graphics file. The EGS4PL post-processor may then be used to convert this file into device-dependent graphics code for any UGS77-supported device. Options exist within EGS4PL that allow for two-dimensional translations and zoom, for creating line structure to indicate particle types and energies, and for optional display of particles by type. All of this is facilitated by means of the command processor EGS4PL EXEC together with new options (5080 and PDEV) with the standard EGS4IN EXEC routine for running EGS4 interactively under VM/SP. 6 refs.

  3. Graphics for Serious Games VFire: Immersive wildfire simulation and visualization

    E-Print Network [OSTI]

    Harris Jr., Frederick C.

    .a,b,Ã a Department of Computer Science and Engineering, University of Nevada, Reno, Reno, NV 89557, United States b Parkway, Reno, NV 89512, United States a r t i c l e i n f o Keywords: Virtual reality Computer-time applications diminishes. Fortunately, the burgeoning processing power of the graphics processing unit can

  4. Hierarchical Iso-Surface Extraction Computer Graphics Group

    E-Print Network [OSTI]

    Desbrun, Mathieu

    Hierarchical Iso-Surface Extraction Ulf Labsik Computer Graphics Group University of Erlangen Kai of our hierarchical iso-surface extraction algorithm. Abstract The extraction and display of iso construct a hierarchy of volumes and extract an iso-surface from the coarsest resolution with a standard

  5. Banded electromagnetic stator core

    DOE Patents [OSTI]

    Fanning, A.W.; Gonzales, A.A.; Patel, M.R.; Olich, E.E.

    1994-04-05T23:59:59.000Z

    A stator core for an electromagnetic pump includes a plurality of circumferentially adjoining groups of flat laminations disposed about a common centerline axis and collectively defining a central bore and a discontinuous outer perimeter, with adjacent groups diverging radially outwardly to form V-shaped gaps. An annular band surrounds the groups and is predeterminedly tensioned to clamp together the laminations, and has a predetermined flexibility in a radial direction to form substantially straight bridge sections between the adjacent groups. 5 figures.

  6. Electromagnetic pump stator core

    DOE Patents [OSTI]

    Fanning, A.W.; Olich, E.E.; Dahl, L.R.

    1995-01-17T23:59:59.000Z

    A stator core for supporting an electrical coil includes a plurality of groups of circumferentially abutting flat laminations which collectively form a bore and perimeter. A plurality of wedges are interposed between the groups, with each wedge having an inner edge and a thicker outer edge. The wedge outer edges abut adjacent ones of the groups to provide a continuous path around the perimeter. 21 figures.

  7. Banded electromagnetic stator core

    DOE Patents [OSTI]

    Fanning, A.W.; Gonzales, A.A.; Patel, M.R.; Olich, E.E.

    1996-06-11T23:59:59.000Z

    A stator core for an electromagnetic pump includes a plurality of circumferentially adjoining groups of flat laminations disposed about a common centerline axis and collectively defining a central bore and a discontinuous outer perimeter, with adjacent groups diverging radially outwardly to form V-shaped gaps. An annular band surrounds the groups and is predeterminedly tensioned to clamp together the laminations, and has a predetermined flexibility in a radial direction to form substantially straight bridge sections between the adjacent groups. 5 figs.

  8. Variable depth core sampler

    DOE Patents [OSTI]

    Bourgeois, P.M.; Reger, R.J.

    1996-02-20T23:59:59.000Z

    A variable depth core sampler apparatus is described comprising a first circular hole saw member, having longitudinal sections that collapses to form a point and capture a sample, and a second circular hole saw member residing inside said first hole saw member to support the longitudinal sections of said first hole saw member and prevent them from collapsing to form a point. The second hole saw member may be raised and lowered inside said first hole saw member. 7 figs.

  9. Core-collapse Supernovae

    SciTech Connect (OSTI)

    Hix, William Raphael [ORNL; Lentz, E. J. [University of Tennessee (UTK) and Oak Ridge National Laboratory (ORNL); Baird, Mark L [ORNL; Chertkow, Merek A [ORNL; Lee, Ching-Tsai [University of Tennessee, Knoxville (UTK); Blondin, J. M. [North Carolina State University; Bruenn, S. W. [Florida Atlantic University, Boca Raton; Messer, Bronson [ORNL; Mezzacappa, Anthony [ORNL

    2013-01-01T23:59:59.000Z

    Marking the inevitable death of a massive star, and the birth of a neutron star or black hole, core-collapse supernovae bring together physics at a wide range in spatial scales, from kilometer-sized hydrodynamic motions (growing to gigameter scale) down to femtometer scale nuclear reactions. Carrying 10$^{51}$ ergs of kinetic energy and a rich-mix of newly synthesized atomic nuclei, core-collapse supernovae are the preeminent foundries of the nuclear species which make up ourselves and our solar system. We will discuss our emerging understanding of the convectively unstable, neutrino-driven explosion mechanism, based on increasingly realistic neutrino-radiation hydrodynamic simulations that include progressively better nuclear and particle physics. Recent multi-dimensional models with spectral neutrino transport from several research groups, which slowly develop successful explosions for a range of progenitors, have motivated changes in our understanding of the neutrino reheating mechanism. In a similar fashion, improvements in nuclear physics, most notably explorations of weak interactions on nuclei and the nuclear equation of state, continue to refine our understanding of how supernovae explode. Recent progress on both the macroscopic and microscopic effects that affect core-collapse supernovae are discussed.

  10. Modeling of Antarctic sea ice in a general circulation model

    SciTech Connect (OSTI)

    Wu, Xingren; Budd, W.F. [Antarctic Cooperative Research Centre, Tasmania (Australia)] [Antarctic Cooperative Research Centre, Tasmania (Australia); Simmonds, I. [School of Earth Sciences, Victoria (Australia)] [School of Earth Sciences, Victoria (Australia)

    1997-04-01T23:59:59.000Z

    A dynamic-thermodynamic sea ice model is developed and coupled with the Melbourne University general circulation model to simulate the seasonal cycle of the Antarctic sea ice distributions The model is efficient, rapid to compute, and useful for a range of climate studies. The thermodynamic part of the sea ice model is similar to that developed by Parkinson and Washington, the dynamics contain a simplified ice rheology that resists compression. The thermodynamics is based on energy conservation at the top surface of the ice/snow, the ice/water interface, and the open water area to determine the ice formation, accretion, and ablation. A lead parameterization is introduced with an effective partitioning scheme for freezing between and under the ice floes. The dynamic calculation determines the motion of ice, which is forced with the atmospheric wind, taking account of ice resistance and rafting. The simulated sea ice distribution compares reasonably well with observations. The seasonal cycle of ice extent is well simulated in phase as well as in magnitude. Simulated sea ice thickness and concentration are also in good agreement with observations over most regions and serve to indicate the importance of advection and ocean drift in the determination of the sea ice distribution. 64 refs., 15 figs., 2 tabs.

  11. An Adynamical, Graphical Approach to Quantum Gravity and Unification

    E-Print Network [OSTI]

    W. M. Stuckey; Michael Silberstein; Timothy McDevitt

    2014-08-30T23:59:59.000Z

    We use graphical field gradients in an adynamical, background independent fashion to propose a new approach to quantum gravity and unification. Our proposed reconciliation of general relativity and quantum field theory is based on a modification of their graphical instantiations, i.e., Regge calculus and lattice gauge theory, respectively. Accordingly, the fundamental structure is a graphical amalgam of space, time, and sources (in parlance of quantum field theory) called a "spacetimesource element." These are fundamental elements of space, time, and sources, not source elements in space and time. The transition amplitude for a spacetimesource element is computed using a path integral with discrete graphical action. The action for a spacetimesource element is constructed from a difference matrix K and source vector J on the graph, as in lattice gauge theory. K is constructed from graphical field gradients so that it contains a non-trivial null space and J is then restricted to the row space of K, so that it is divergence-free and represents a conserved exchange of energy-momentum. This construct of K and J represents an adynamical global constraint between sources, the spacetime metric, and the energy-momentum content of the element, rather than a dynamical law for time-evolved entities. We use this approach via modified Regge calculus to correct proper distance in the Einstein-deSitter cosmology model yielding a fit of the Union2 Compilation supernova data that matches LambdaCDM without having to invoke accelerating expansion or dark energy. A similar modification to lattice gauge theory results in an adynamical account of quantum interference.

  12. Quantification of summertime water ice deposition on the Martian north polar ice cap

    E-Print Network [OSTI]

    Brown, Adrian J; Becerra, Patricio; Byrne, Shane

    2015-01-01T23:59:59.000Z

    We use observations from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) of the north polar cap during late summer for two Martian years, to monitor the complete summer cycle of albedo and water ice grain size in order to place quantitative limits of the amount of water ice deposited in late summer. We establish here for the first time the complete spring to summer cycle of water ice grain sizes on the north polar cap. The apparent grain sizes grow until Ls=132, when they appear to shrink again, until they are obscured at the end of summer by the north polar hood. Under the assumption that the shrinking of grain sizes is due to the deposition of find grained ice, we quantify the amount of water ice deposited per Martian boreal summer, and estimate the amount of water ice that must be transported equatorward. Interestingly, we find that the relative amount of water ice deposited in the north cap during boreal summer (0.7-7 microns) is roughly equivalent to the average amount of water ice depos...

  13. Home Atmosphere Sea Ice Ocean Land Greenland Biology Greenland Ice Sheet Mass Balance

    E-Print Network [OSTI]

    Box, Jason E.

    , thinning and breakup of Jakobshavn Glacier's (SW Greenland) floating ice tongue and acceleration-to-year variability in GrIS mass turnover, e.g. sudden glacier accelerations (Rignot and Kanagartnam 2006). Since or 2005. Physical response mechanisms, such as hydraulic acceleration of the ice sheet from continued

  14. Ice nucleation and overseeding of ice in volcanic clouds A. J. Durant,1,2

    E-Print Network [OSTI]

    Rose, William I.

    that such ``overseeded'' volcanic clouds will exhibit enhanced ice crystal concentrations and smaller average ice crystal nucleation in volcanic plumes and clouds affects dynamics [Glaze et al., 1997; Herzog et al., 1998; Mastin- porting water to the stratosphere [Glaze et al., 1997] and these fluxes depend in part on the microphysics

  15. ICED'09/148 INTERNATIONAL CONFERENCE ON ENGINEERING DESIGN, ICED'09

    E-Print Network [OSTI]

    Papalambros, Panos

    derived from the diversity of disciplines that contribute to design, including engineering, economics with the usual engineering requirements. This article describes the basic ideas in constructing the designICED'09/148 INTERNATIONAL CONFERENCE ON ENGINEERING DESIGN, ICED'09 24 - 27 AUGUST 2009, STANFORD

  16. Development of magnetic luminescent core/shell nanocomplex particles with fluorescence using Rhodamine 6G

    SciTech Connect (OSTI)

    Lee, Hee Uk; Song, Yoon Seok [Department of Chemical and Biological Engineering, Korea University, 5 Ga, Anam-Dong, Sungbuk-Gu, Seoul 136-701 (Korea, Republic of)] [Department of Chemical and Biological Engineering, Korea University, 5 Ga, Anam-Dong, Sungbuk-Gu, Seoul 136-701 (Korea, Republic of); Park, Chulhwan [Department of Chemical Engineering, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Gu, Seoul 139-701 (Korea, Republic of)] [Department of Chemical Engineering, Kwangwoon University, 447-1 Wolgye-Dong, Nowon-Gu, Seoul 139-701 (Korea, Republic of); Kim, Seung Wook, E-mail: kimsw@korea.ac.kr [Department of Chemical and Biological Engineering, Korea University, 5 Ga, Anam-Dong, Sungbuk-Gu, Seoul 136-701 (Korea, Republic of)

    2012-12-15T23:59:59.000Z

    Graphical abstract: Display Omitted Highlights: ? A simple method was developed to synthesize Co-B/SiO{sub 2}/dye/SiO{sub 2} composite particles. ? The magnetic particle shows that highly luminescent and core/shell particles are formed. ? Such core/shell particles can be easily suspended in water. ? The magnetic particles could detect fluorescence for the application of biosensor. -- Abstract: A simple and reproducible method was developed to synthesize a novel class of Co-B/SiO{sub 2}/dye/SiO{sub 2} composite core/shell particles. Using a single cobalt core, Rhodamine 6G of organic dye molecules was entrapped in a silica shell, resulting in core/shell particles of ?200 nm diameter. Analyses using a variety of techniques such as transmission electron microscopy, X-ray photoelectron spectroscopy, vibration sample magnetometry, confocal laser scanning microscopy, and fluorescence intensity demonstrated that dye molecules were trapped inside the core/shell particles. A photoluminescence investigation showed that highly luminescent and photostable core/shell particles were formed. Such core/shell particles can be easily suspended in water. The synthesized magnetic particles could be used to detect fluorescence on glass substrate arrays for bioassay and biosensor applications.

  17. Volume 0 (1981), Number 0 pp. 17 COMPUTER GRAPHICS forum Resampling Strategies for Deforming MLS Surfaces

    E-Print Network [OSTI]

    Buscaglia, Gustavo C.

    Volume 0 (1981), Number 0 pp. 1­7 COMPUTER GRAPHICS forum Resampling Strategies for Deforming MLS Graphics]: Computational Geometry and Object Modeling G.1.2 [Numerical Analysis]: Approximation G.2

  18. Accelerating Energy Minimization using Graphics Processors* Bharat Sukhwani Martin C. Herbordt

    E-Print Network [OSTI]

    Herbordt, Martin

    Accelerating Energy Minimization using Graphics Processors* Bharat Sukhwani Martin C. Herbordt article, we present the acceleration of the energy evaluation phase of minimization on a graphics Department of Electrical and Computer Engineering, Boston University Abstract: Energy minimization

  19. The role of transfer-appropriate processing in the effectiveness of decision-support graphics 

    E-Print Network [OSTI]

    Stiso, Michael E.

    2004-11-15T23:59:59.000Z

    The current project is an examination of the effectiveness of decision-support graphics in a simulated real-world task, and of the role those graphics should play in training. It is also an attempt to apply a theoretical ...

  20. StarLogo TNG : the convergence of graphical programming and text processing

    E-Print Network [OSTI]

    McCaffrey, Corey (Corey Stanley Gordon)

    2006-01-01T23:59:59.000Z

    StarLogo TNG is a robust graphical programming environment for secondary students. Despite the educational advantages of graphical programming, TNG has sustained criticism from some who object to the exclusion of a textual ...

  1. ICE AND DUST IN THE PRESTELLAR DARK CLOUD LYNDS 183: PREPLANETARY MATTER AT THE LOWEST TEMPERATURES

    SciTech Connect (OSTI)

    Whittet, D. C. B.; Poteet, C. A.; Bajaj, V. M.; Horne, D. [Department of Physics, Applied Physics and Astronomy and New York Center for Astrobiology, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, NY 12180 (United States); Chiar, J. E. [SETI Institute, Carl Sagan Center, 189 Bernardo Avenue, Mountain View, CA 94043 (United States); Pagani, L. [LERMA, UMR 8112 du CNRS, Observatoire de Paris, 61 Av. de l'Observatoire, F-75014 Paris (France); Shenoy, S. S. [SOFIA Science Center, NASA Ames Research Center, MS 232-12, Moffett Field, CA 94035 (United States); Adamson, A. J. [Gemini Observatory, Southern Operations Center, Casilla 603, La Serena (Chile)

    2013-09-10T23:59:59.000Z

    Dust grains are nucleation centers and catalysts for the growth of icy mantles in quiescent interstellar clouds, the products of which may accumulate into preplanetary matter when new stars and solar systems form within the clouds. In this paper, we present the first spectroscopic detections of silicate dust and the molecular ices H{sub 2}O, CO, and CO{sub 2} in the vicinity of the prestellar core L183 (L134N). An infrared photometric survey of the cloud was used to identify reddened background stars, and we present spectra covering solid-state absorption features in the wavelength range 2-20 {mu}m for nine of them. The mean composition of the ices in the best-studied line of sight (toward J15542044-0254073) is H{sub 2}O:CO:CO{sub 2} Almost-Equal-To 100:40:24. The ices are amorphous in structure, indicating that they have been maintained at low temperature ({approx}< 15 K) since formation. The ice column density N(H{sub 2}O) correlates with reddening by dust, exhibiting a threshold effect that corresponds to the transition from unmantled grains in the outer layers of the cloud to ice-mantled grains within, analogous to that observed in other dark clouds. A comparison of results for L183 and the Taurus and IC 5146 dark clouds suggests common behavior, with mantles first appearing in each case at a dust column corresponding to a peak optical depth {tau}{sub 9.7} = 0.15 {+-} 0.03 in the silicate feature. Our results support a previous conclusion that the color excess E{sub J-K} does not obey a simple linear correlation with the total dust column in lines of sight that intercept dense clouds. The most likely explanation is a systematic change in the optical properties of the dust as the density increases.

  2. Niigata (Japan), July 18-20, 2007 Pierre Laforcade 1 Graphical representation of abstractGraphical representation of abstract

    E-Print Network [OSTI]

    Laforcade, Pierre

    Niigata (Japan), July 18-20, 2007 Pierre Laforcade 1 Graphical representation of abstract (Japan), July 18-20, 2007 Pierre Laforcade 2 Outline 1. Research context 2. Experimentation: the UML4LD proposition 3. Summary and ongoing work #12;Niigata (Japan), July 18-20, 2007 Pierre Laforcade 3 Research

  3. Heat transfer in ice hockey halls: measurements, energy analysis and analytical ice pad temperature profile

    E-Print Network [OSTI]

    Andrea Ferrantelli; Klaus Viljanen

    2015-06-30T23:59:59.000Z

    We consider heat transfer processes in an ice hockey hall, during operating conditions, with a bottom-up approach based upon on-site measurements. Detailed temperature data of both the ice pad and the air above the ice rink are used for a heat balance calculation in the steady-state regime, which quantifies the impact of each single heat source. We solve the heat equation in the ice slab in transient regime, and obtain a general analytical formula for the temperature profile. This solution is then applied to the resurfacing process by using our measurements as (time-dependent) boundary conditions (b.c.), and compared to an analogous numerical computation with good agreement. Our analytical formula is given with implicit initial condition and b.c., therefore it can be used not only in ice halls, but in a large variety of engineering applications.

  4. Heat transfer in ice hockey halls: measurements, energy analysis and analytical ice pad temperature profile

    E-Print Network [OSTI]

    Ferrantelli, Andrea

    2015-01-01T23:59:59.000Z

    We consider heat transfer processes in an ice hockey hall, during operating conditions, with a bottom-up approach based upon on-site measurements. Detailed temperature data of both the ice pad and the air above the ice rink are used for a heat balance calculation in the steady-state regime, which quantifies the impact of each single heat source. We solve the heat equation in the ice slab in transient regime, and obtain a general analytical formula for the temperature profile. This solution is then applied to the resurfacing process by using our measurements as (time-dependent) boundary conditions (b.c.), and compared to an analogous numerical computation with good agreement. Our analytical formula is given with implicit initial condition and b.c., therefore it can be used not only in ice halls, but in a large variety of engineering applications.

  5. The Role of Snow and Ice in the Climate System

    SciTech Connect (OSTI)

    Barry, Roger (NSIDC) [NSIDC

    2007-12-19T23:59:59.000Z

    Global snow and ice cover (the 'cryosphere') plays a major role in global climate and hydrology through a range of complex interactions and feedbacks, the best known of which is the ice - albedo feedback. Snow and ice cover undergo marked seasonal and long term changes in extent and thickness. The perennial elements - the major ice sheets and permafrost - play a role in present-day regional and local climate and hydrology, but the large seasonal variations in snow cover and sea ice are of importance on continental to hemispheric scales. The characteristics of these variations, especially in the Northern Hemisphere, and evidence for recent trends in snow and ice extent are discussed.

  6. The Use of Graphics Calculator in a Matriculation Statistics Classroom: A Malaysian Perspective

    E-Print Network [OSTI]

    Krishnan, Saras; Idris, Noraini

    2013-01-01T23:59:59.000Z

    graphics calculator for five weeks showed significantly greater improvement on their mathematics achievement than students in the control

  7. Optimal Nonmyopic Value of Information in Graphical Models Efficient Algorithms and Theoretical Limits

    E-Print Network [OSTI]

    Optimal Nonmyopic Value of Information in Graphical Models ­ Efficient Algorithms and Theoretical, we present the first efficient optimal algorithms for selecting observations for a class of graphical: In most graphical models tasks, if one designs an efficient algorithm for chain graphs, such as HMMs

  8. Optimal Nonmyopic Value of Information in Graphical Models --Efficient Algorithms and Theoretical Limits

    E-Print Network [OSTI]

    Optimal Nonmyopic Value of Information in Graphical Models -- Efficient Algorithms and Theoretical, we present the first efficient optimal algorithms for selecting observations for a class of graphical: In most graphical models tasks, if one designs an efficient algorithm for chain graphs, such as HMMs

  9. A 2D Graphics Interface Based on CGI Version 1.0

    E-Print Network [OSTI]

    Clausen, Michael

    ) standards for device independent driving of graphics hardware, both issued from standardization institutes#12; CGI ++ A 2D Graphics Interface Based on CGI Version 1.0 Dieter W. Fellner Martin Fischer Currently, designers of 2D graphics applications have to deal with several (and unfor­ tunately incompatible

  10. The svgl toolkit: enabling fast rendering of rich 2D graphics Stephane Conversy1,2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    The svgl toolkit: enabling fast rendering of rich 2D graphics St´ephane Conversy1,2 Jean powerful graphical processors be- come available on mainstream computers, it becomes possible , a graphical toolkit that enables programmers and design- ers of interactive applications to benefit from

  11. NORMAL FORMS NEAR A SADDLE-NODE AND APPLICATIONS TO FINITE CYCLICITY OF GRAPHICS

    E-Print Network [OSTI]

    Rousseau, Christiane

    NORMAL FORMS NEAR A SADDLE-NODE AND APPLICATIONS TO FINITE CYCLICITY OF GRAPHICS F. Dumortier, Y and allows to prove the finite cyclicity of families of graphics ("ensembles") occuring inside analytic families of vector fields. It is used in [RZ1] to prove the finite cyclicity of graphics through

  12. Graphics Recognition--What Else? Karl Tombre1,2,3

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Graphics Recognition--What Else? Karl Tombre1,2,3 1 INRIA, 615 rue du jardin botanique, 54600 try to identify some new grand challenges for the field of graphics recognition. 1 Introduction In this paper, we will not repeat the brief summary of the history of graphics recognition, which was presented

  13. Three Dimensional Graphics Algorithms on the MicroGrain Array ProcessorII

    E-Print Network [OSTI]

    Bishop, Benjamin

    Three Dimensional Graphics Algorithms on the Micro­Grain Array Processor­II Benjamin Bishop Yan The Pennsylvania State University University Park, PA 16802 Abstract Three­dimensional graphics processors play tools, architectural CAD tools, and physical modeling. But high per­ formance graphics subsystems

  14. Combining Graphics and Layout Language i n a Sing1e Interactive System

    E-Print Network [OSTI]

    Combining Graphics and Layout Language i n a Sing1e Interactive System by Stephen Trimberger. Copyright, California Institute of Technology, 1980 #12;Combining Graphics and Layout Language in a Single a design in that language, one must plot it. Interactive graphics systems, on the other hand, allow

  15. Dynamic Graphics in a GIS: A Link between ARC INFOTM and XGobi

    E-Print Network [OSTI]

    Symanzik, Jürgen

    Dynamic Graphics in a GIS: A Link between ARC INFOTM and XGobi Jurgen Symanzik1, James Majure2 graphics program, XGobi. GISs provide a user with a standard and convenient software for spatial graphics program for data visualization in the X Window SystemTM . It is designed for the exploration

  16. Fast and Accurate Time-Domain Simulations with Commodity Graphics Hardware

    E-Print Network [OSTI]

    Fast and Accurate Time-Domain Simulations with Commodity Graphics Hardware Gerard S. Baron*1 the efficacy of graphics hardware for the computational electrodynamics community. In particular, we illustrate developments in graphics hardware acceleration provide operations that can be applied to dramatically speed up

  17. Journal of Molecular Graphics and Modelling 21 (2003) 499515 A priori molecular descriptors in QSAR

    E-Print Network [OSTI]

    Ferreira, Márcia M. C.

    Journal of Molecular Graphics and Modelling 21 (2003) 499­515 A priori molecular descriptors in QSAR: a case of HIV-1 protease inhibitors II. Molecular graphics and modeling Rudolf Kiralj, Márcia M; accepted 14 November 2002 Abstract Molecular graphics and modeling methods illustrated the chemical

  18. Accelerated Implementation of the S-MRTD Technique Using Graphics Processor Units

    E-Print Network [OSTI]

    1073 Accelerated Implementation of the S-MRTD Technique Using Graphics Processor Units G.Baron, E MRTD (S-MRTD), can be dramatically accelerated, through its im- plementation in commodity graphics hardware. This imple- mentation is achieved by mapping the numerical operations of S-MRTD to graphics

  19. Graphics Recognition: The Last Ten Years and the Next Ten Years

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Graphics Recognition: The Last Ten Years and the Next Ten Years Karl Tombre LORIA-INPL, ´Ecole des'05 marked the 10th anniversary of the series of inter- national workshops on graphics recognition to be Drifting Away Looking at the research themes of the groups active in graphics recognition, it appears

  20. The Use of Computer Graphics in the Visual Analysis of the Proposed

    E-Print Network [OSTI]

    Standiford, Richard B.

    The Use of Computer Graphics in the Visual Analysis of the Proposed Sunshine Ski Area Expansion1 Columbia, Canada. Abstract: This paper describes the use of computer graphics in designing part, the adverse visual impacts of ski-run development. Computer graphics have proven, in this case