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Simulation Data as Data Streams

Description: Computational or scientific simulations are increasingly being applied to solve a variety of scientific problems. Domains such as astrophysics, engineering, chemistry, biology, and environmental studies are benefiting from this important capability. Simulations, however, produce enormous amounts of data that need to be analyzed and understood. In this overview paper, we describe scientific simulation data, its characteristics, and the way scientists generate and use the data. We then compare an… more
Date: November 19, 2003
Creator: Abdulla, G.; Arrighi, W. & Critchlow, T.
Partner: UNT Libraries Government Documents Department
open access

Surface Analytical Study of CuInSe2 Treated in Cd-Containing Partial Electrolyte Solution

Description: Junction formation in CuInSe2 (CIS) has been studied by exposing thin films and single-crystal samples to solutions containing NH4OH and CdSO4. The treated samples were analyzed by secondary ion mass spectrometry to determine the amount and distribution of Cd deposited on the surface of the films. Cadmium is found to react with the surface for all the solution exposure times and temperatures studied. The reaction rapidly approaches the endpoint and remains relatively unchanged for subsequent so… more
Date: November 19, 1998
Creator: Asher, S. E.; Ramanathan, K.; H., Wiesner; Moutinho, H. (National Renewable Energy Laboratory) & Niles, D. W. (Hewlett-Packard Corporation)
Partner: UNT Libraries Government Documents Department
open access

Analysis of Hydroperoxides in Solid Polyethylene by MAS (13)C NMR and EPR

Description: {sup 13}C-enriched polyethylene was subjected to {gamma}-irradiation in the presence of air at 25 and 80 C for total doses ranging from 71 to 355 kGy. Significant quantities of hydroperoxides were detected in the 25 C irradiated sample by {sup 13}C magic angle spinning NMR spectroscopy. This method of detection was performed on the solid polymer and required no chemical derivatization or addition of solvent. The chemical stability and subsequent products of the hydroperoxide species were studie… more
Date: November 19, 1999
Creator: Assink, Roger A.; Celina, Mathias C.; Dunbar, Timothy D.; Alam, Todd M.; Clough, Roger Lee & Gillen, Kenneth T.
Partner: UNT Libraries Government Documents Department
open access

An Integrated Method for Accurate Determination of Melting in High-Pressure Laser Heating Experiments

Description: We present an integrated approach for melting determination by monitoring several criteria simultaneously. In particular we combine x-ray diffraction observations with the detection of discontinuities in the optical properties by spectroradiometric measurements. This approach significantly increases the confidence of melt identification, especially with low-Z samples. We demonstrate the method with observations of melt in oxygen at 47 and 55 gigapascals.
Date: November 19, 2007
Creator: Benedetti, L R; Antonangeli, D; Farber, D L & Mezouar, M
Partner: UNT Libraries Government Documents Department
open access

Performance of a Nova beamline with high damage threshold glass

Description: We report on measurements made on a Nova beamline whose output amplifier stages contain new high damage threshold, platinum particle-free laser glass. We project future operating limits for the Nova ten beam amplifier system. 4 refs.
Date: November 19, 1987
Creator: Bibeau, C.; Ehrlich, R. B.; Lawson, J. K.; Laumann, C. W.; Pennington, D. M.; Weiland, T. L. et al.
Partner: UNT Libraries Government Documents Department
open access

Grazing incidence metal mirrors as the final elements in a laser driver for inertial confinement fusion

Description: Grazing incidence metal mirrors (GIMMs) have been examined to replace dielectric mirrors for the final elements in a laser beam line for an inertial confinement fusion reactor. For a laser driver with a wavelength from 250 to 500 nm in a 10-ns pulse, irradiated mirrors made of Al, Al alloys, or Mg were found to have calculated laser damage limits of 0.3--2.3 J/cm{sup 2} of beam energy and neutron lifetime fluence limits of over 5 {times} 10{sup 20} 14 MeV n/cm{sup 2} (or 2.4 full power years wh… more
Date: November 19, 1990
Creator: Bieri, R. L. & Guinan, M. W.
Partner: UNT Libraries Government Documents Department
open access

Code Development for Control Design Applications: Phase I: Structural Modeling

Description: The design of integrated controls for a complex system like a wind turbine relies on a system model in an explicit format, e.g., state-space format. Current wind turbine codes focus on turbine simulation and not on system characterization, which is desired for controls design as well as applications like operating turbine model analysis, optimal design, and aeroelastic stability analysis. This paper reviews structural modeling that comprises three major steps: formation of component equations, … more
Date: November 19, 1998
Creator: Bir, G. S. & Robinson, M.
Partner: UNT Libraries Government Documents Department
open access

Shape Isomers: Mean-Field Description and Beyond

Description: Nuclear Hartree-Fock (HF) + BCS calculations have led to predictions of shape isomerism in isotopes of Pt, Hg and Os nuclei. These have been confirmed through the observation of superdeformed rotational bands in {sup 190,{hor ellipsis},194}Hg. Encouraged by these measurements and similar observations in {sup 194}Pb, we have extended these calculations to a wide range of contiguous nuclei. These HF results, for {sup 192,194}Pt, {sup 190,{hor ellipsis},198}Hg and {sup 194}Pb, have been employed i… more
Date: November 19, 1990
Creator: Bonche, P.; Krieger, S. J.; Weiss, M. S. (Lawrence Livermore National Lab., CA (USA)); Dobaczewski, J. (Warsaw Univ. (Poland). Inst. Fizyki Teoretycznej); Flocard, H. (Paris-11 Univ., 91 - Orsay (France). Div. de Physique Theorique); Heenen, P. H. (Universite Libre de Bruxelles (Belgium)) et al.
Partner: UNT Libraries Government Documents Department
open access

HANFORD SITE WELDING PROGRAM SUCCESSFULLY PROVIDING A SINGLE SITE FUNCTION FOR USE BY MULTIPLE CONTRACTORS

Description: The Department of Energy, Richland Operations (DOE-RL) recently restructured its Hanford work scope, awarding two new contracts over the past several months for a total of three contracts to manage the sites cleanup efforts. DOE-RL met with key contractor personnel prior to and during contract transition to ensure site welding activities had appropriate oversight and maintained code compliance. The transition also provided an opportunity to establish a single site-wide function that would provi… more
Date: November 19, 2009
Creator: Cannell, G. R.
Partner: UNT Libraries Government Documents Department
open access

Comparative Gamma Spectroscopy with SrI2(Eu), GYGAG(Ce) and Bi-loaded Plastic Scintillators

Description: We are developing new scintillator materials that offer potential for high resolution gamma ray spectroscopy at low cost. Single crystal SrI{sub 2}(Eu) offers {approx}3% resolution at 662 keV, in sizes of {approx}1 in{sup 3}. We have developed ceramics processing technology allowing us to achieve cubic inch scale transparent ceramic scintillators offering gamma spectroscopy performance superior to NaI(Tl). We fabricated a bismuth-loaded plastic scintillator that demonstrates energy resolution o… more
Date: November 19, 2010
Creator: Cherepy, N J
Partner: UNT Libraries Government Documents Department
open access

Analyses of a Reinforced Concrete Containment with Liner Corrosion Damage

Description: Incidents of liner corrosion in nuclear power containment structures have been recorded. These incidents and concerns of other possible liner corrosion in containment have prompted an interest in determining g the capacity of a degraded containment. Finite element analyses of a typical pressurized water reactor (PWR) reinforced concrete containment with liner corrosion were conducted using the A13AQUS finite element code with the ANACAP-U nonlinear concrete constitutive model. The effect of lin… more
Date: November 19, 1998
Creator: Cherry, J. L. & Smith, J. A.
Partner: UNT Libraries Government Documents Department
open access

Report of the subgroup on alternative models and new ideas

Description: We summarize some of the work done by the P3 subgroup on Alternative Models and New Ideas. The working group covered a broad range of topics including a constrained Standard Model from an extra dimension, a discussion of recent ideas addressing the strong CP problem, searches for doubly charged higgs bosons in e{gamma} collisions, and an update on discovery limits for extra neutral gauge bosons at hadron colliders. The breadth of topics rejects the many ideas and approaches to physics beyond th… more
Date: November 19, 2002
Creator: Chertok, M.; Dienes, K.; Godfrey, S.; Kalyniak, P.; Kaplan, D.; Kribs, G. D. et al.
Partner: UNT Libraries Government Documents Department
open access

Search for Ultra High-Energy Neutrinos with AMANDA-II

Description: A search for diffuse neutrinos with energies in excess of 10{sup 5} GeV is conducted with AMANDA-II data recorded between 2000 and 2002. Above 10{sup 7} GeV, the Earth is essentially opaque to neutrinos. This fact, combined with the limited overburden of the AMANDA-II detector (roughly 1.5 km), concentrates these ultra high-energy neutrinos at the horizon. The primary background for this analysis is bundles of downgoing, high-energy muons from the interaction of cosmic rays in the atmosphere. N… more
Date: November 19, 2007
Creator: Collaboration, IceCube; Klein, Spencer & Ackermann, M.
Partner: UNT Libraries Government Documents Department
open access

Birth of Massive Black Hole Binaries

Description: If massive black holes (BHs) are ubiquitous in galaxies and galaxies experience multiple mergers during their cosmic assembly, then BH binaries should be common albeit temporary features of most galactic bulges. Observationally, the paucity of active BH pairs points toward binary lifetimes far shorter than the Hubble time, indicating rapid inspiral of the BHs down to the domain where gravitational waves lead to their coalescence. Here, we review a series of studies on the dynamics of massive BH… more
Date: November 19, 2007
Creator: Colpi, M.; Dotti, M.; Mayer, L. & Kazantzidis, S.
Partner: UNT Libraries Government Documents Department
open access

Atmospheric Release Advisory Capability (ARAC)

Description: The chief purpose of ARAC data acquisition program is to provide site officials, who are responsible for ensuring maximum health protection for the endangered site personnel and public, with estimates of the effects of atmospheric releases of hazardous material as rapidly and accurately as possible. ARAC is in the initial stages of being implemented and is therefore susceptible to changes before it reaches its final form. However the concept of ARAC is fully developed and was successfully demon… more
Date: November 19, 1975
Creator: Dickerson, Marvin H.
Partner: UNT Libraries Government Documents Department
open access

Tritium effects on germ cells and fertility

Description: Primordial oocytes in juvenile mice show acute gamma-ray LD/sub 50/ as low as 6 rad. This provides opportunities for determining dose-response relations at low doses and chronic exposure in the intact animal - conditions of particular interest for hazard evaluation. Examined in this way, /sup 3/HOH in body water is found to kill murine oocytes exponentially with dose, the LD/sub 50/ level for chronic exposure being only 2..mu..Ci/ml (delivering 0.4 rad/day). At very low doses and dose rates, wh… more
Date: November 19, 1982
Creator: Dobson, R.L.; Kwan, T.C. & Straume, T.
Partner: UNT Libraries Government Documents Department
open access

Condition for production of circulating proton beam with intensity greater than space charge limit.

Description: Transverse e-p instability in proton rings could be damped by increasing the beam density and the rate of secondary particles production above the threshold level, with the corresponding decrease of unstable wavelength {lambda} below the transverse beam size h (increase of beam density n{sub b} and ion density n{sub i} above the threshold level: n{sub b} + n{sub i} > {beta}{sup 2}/(r{sub e} h{sup 2}), where r{sub e} = e{sup 2}/mc{sup 2}). Such island of stability can be reached by a fast cha… more
Date: November 19, 2002
Creator: Dudnikov, Vadim
Partner: UNT Libraries Government Documents Department
open access

Staged licensing: An essential element of the NRC`s revised regulations

Description: Over the past several years, Congress has directed the Department of Energy (DOE), the Nuclear Regulatory Commission (NRC), and the Environmental Protection Agency (EPA) to abandon their efforts to assess an array of potential candidate geologic repository sites for the permanent disposal of spent nuclear reactor fuel and high level radioactive waste, to develop generally applicable requirements for licensing geologic repositories, and to develop generally applicable radiation protection standa… more
Date: November 19, 1997
Creator: Echols, F. S.
Partner: UNT Libraries Government Documents Department
open access

Indentation Size Effects in Single Crystal Copper as Revealed by Synchrotron X-ray Microdiffraction

Description: The indentation size effect (ISE) has been observed in numerous nanoindentation studies on crystalline materials; it is found that the hardness increases dramatically with decreasing indentation size - a 'smaller is stronger' phenomenon. Some have attributed the ISE to the existence of strain gradients and the geometrically necessary dislocations (GNDs). Since the GND density is directly related to the local lattice curvature, the Scanning X-ray Microdiffraction ({mu}SXRD) technique, which can … more
Date: November 19, 2007
Creator: Feng, G.; Budiman, A. S.; Nix, W. D.; Tamura, N. & Patel, J. R.
Partner: UNT Libraries Government Documents Department
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