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0.52eV Quaternary InGaAsSb Thermophotovoltaic Diode Technology

Description: Thermophotovoltaic (TPV) diodes fabricated from 0.52eV lattice-matched InGaAsSb alloys are grown by Metal Organic Vapor Phase Epitaxy (MOVPE) on GaSb substrates. 4cm{sup 2} multi-chip diode modules with front-surface spectral filters were tested in a vacuum cavity and attained measured efficiency and power density of 19% and 0.58 W/cm{sup 2} respectively at operating at temperatures of T{sub radiator} = 950 C and T{sub diode} = 27 C. Device modeling and minority carrier lifetime measurements of… more
Date: June 9, 2004
Creator: Dashiell, M. W.; Beausang, J. F.; Nichols, G.; Depoy, D. M.; Danielson, L. R.; Ehsani, H. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Acceleration of calcite kinetics by abalone nacre proteins

Description: The fascinating shapes and hierarchical designs of biomineralized structures have long been an inspiration to materials scientists because of the potential they suggest for biomolecular control over synthesis of crystalline materials. One prevailing view is that mineral-associated macromolecules are responsible for initiating and stabilizing non-equilibrium crystal polymorphs and morphologies through interactions between anionic moieties and cations in solution or at mineral surfaces. Indeed, n… more
Date: June 9, 2005
Creator: Fu, G.; Qiu, S. R.; Orme, C. A.; Morse, D. E. & De Yoreo, J. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Acoustic emission from beryllium

Description: The acoustic emission from both powder and ingot source beryllium has been measured as a function of strain and prior heat treatment. Most measurements were made during tensile deformation, but a limited number of compression tests have also been performed. The acoustic emission observed was of the burst type, with little or no contribution from continuous type emission. The emission was characterized by the variation of burst rate and average energy per burst as a function of strain. The tensi… more
Date: June 9, 1976
Creator: Heiple, C. R. & Adams, R. O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aerial Radiological Surveys

Description: Measuring terrestrial gamma radiation from airborne platforms has proved to be a useful method for characterizing radiation levels over large areas. Over 300 aerial radiological surveys have been carried out over the past 25 years including U.S. Department of Energy (DOE) sites, commercial nuclear power plants, Formerly Utilized Sites Remedial Action Program/Uranium Mine Tailing Remedial Action Program (FUSRAP/UMTRAP) sites, nuclear weapons test sites, contaminated industrial areas, and nuclear… more
Date: June 9, 1997
Creator: Proctor, A. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ambient Laboratory Coater for Advanced Gas Reactor Fuel Development

Description: this research is targeted at developing improved experimentally-based scaling relationships for the hydrodynamics of shallow, gas-spouted beds of dense particles. The work is motivated by the need to more effctively scale up shallow spouted beds used in processes such as in the coating of nuclear fuel particles where precise control of solids and gas circulation is critically important. Experimental results reported here are for a 50 mm diameter spouted bed containing two different types of b… more
Date: June 9, 2010
Creator: Bruns, Duane D.; Counce, Robert M. & Rojas, Irma D. Lima
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of Recombination Processes in 0.5-0.6 eV Epitaxial GaInAsSb Lattice-matched to GaSb

Description: This work summarizes recent data on minority carrier lifetime in n- and p-type double heterostructures (DHs) of 0.5-0.6 eV GaInAsSb confined with GaSb and AlGaAsSb cap layers. Recombination times were measured by time-resolved photoluminescence (TRPL) and by optical frequency response (OFR) to sinusoidal excitation. It was shown that one of the mechanisms responsible for interface recombination in GaSb/GaInAsSb/GaSb DHs is thermionic emission of carriers over the heterobarrier. Considerable imp… more
Date: June 9, 2004
Creator: Donetsky, D.; Anikeev, S.; Gu, N.; Belenky, G.; Luryi, S.; Wang, C. A. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical and numerical evaluation of Landau cavities in the Fermilab Booster

Description: Longitudinal coupled bunch instability has been observed in the Fermilab Booster at high intensity. It is a cause for concern due to its effect on the Tevatron collider performance. We study this phenomenon using initial value technique to correctly account for the underlying transient nature. Analytic result is obtained for any mode and comparison is made between ordinary harmonic potential and higher harmonic (Landau) cavity potential. A computer program is developed to facilitate the calcula… more
Date: June 9, 1988
Creator: Chao, Yu-Chiu & Ng, King-Yuen
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Annotation of the Clostridium Acetobutylicum Genome

Description: The genome sequence of the solvent producing bacterium Clostridium acetobutylicum ATCC824, has been determined by the shotgun approach. The genome consists of a 3.94 Mb chromosome and a 192 kb megaplasmid that contains the majority of genes responsible for solvent production. Comparison of C. acetobutylicum to Bacillus subtilis reveals significant local conservation of gene order, which has not been seen in comparisons of other genomes with similar, or, in some cases, closer, phylogenetic proxi… more
Date: June 9, 2004
Creator: Daly, M. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Antimony Based III-V Thermophotovoltaic Devices

Description: Antimony-based III-V thermophotovoltaic (TPV) cells are attractive converters for systems with low radiator temperature around 1100 to 1700 K, since these cells potentially can be spectrally matched to the thermal source. Cells under development include GaSb and the lattice-matched GaInAsSb/GaSb and InPAsSb/InAs quaternary systems. GaSb cell technology is the most mature, owing in part to the relative ease in preparation of the binary alloy compared to quaternary GaInAsSb and InPAsSb alloys. De… more
Date: June 9, 2004
Creator: Wang, C. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application experiences with the Globus toolkit.

Description: The Globus grid toolkit is a collection of software components designed to support the development of applications for high-performance distributed computing environments, or ''computational grids'' [14]. The Globus toolkit is an implementation of a ''bag of services'' architecture, which provides application and tool developers not with a monolithic system but rather with a set of stand-alone services. Each Globus component provides a basic service, such as authentication, resource allocation,… more
Date: June 9, 1998
Creator: Brunett, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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APPLICATION OF NOVEL NEUTRON CORRELATION TECHNIQUES TO NUCLEAR MATERIAL MEASUREMENTS

Description: Confirmation of the fissile mass of a system containing plutonium can be done using neutron multiplicity techniques. This can be accomplished with a detector system that is smaller and less costly than a standard neutron multiplicity counter (NMC). Also the fissile mass of a uranium containing system can be confirmed by passive means. Recent work at Lawrence Livermore National Laboratory has demonstrated that simple slab neutron detectors and a novel approach to data acquisition and analysis ca… more
Date: June 9, 2006
Creator: Sale, Ken
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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APPLICATIONS OF CURRENT TECHNOLOGY FOR CONTINUOUS MONITORING OF SPENT FUEL

Description: Advancements in technology have opened many opportunities to improve upon the current infrastructure surrounding the nuclear fuel cycle. Embedded devices, very small sensors, and wireless technology can be applied to Security, Safety, and Nonproliferation of Spent Nuclear Fuel. Security, separate of current video monitoring systems, can be improved by integrating current wireless technology with a variety of sensors including motion detection, altimeter, accelerometer, and a tagging system. By … more
Date: June 9, 2013
Creator: Drayer, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Applications of X-Ray Lasers Utilizing Plasmas that are only a Few Times Ionised

Description: With the advent of tabletop X-ray lasers that operate at high repetition rate more emphasis is being put on finding useful applications for these lasers. The 14.7 nm Ni-like Pd X-ray laser at Lawrence Livermore National Laboratory is being used to do many interferometer experiments. As detailed quantitative comparisons are done between experiments and code simulations it is clear that some of the assumptions used to analyze the experiments need to be modified as one explores plasmas that are on… more
Date: June 9, 2004
Creator: Nilsen, Joseph & Scofield, James H
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ATOMIC FORCE LITHOGRAPHY OF NANO MICROFLUIDIC CHANNELS FOR VERIFICATION AND MONITORING IN AQUEOUS SOLUTIONS

Description: The growing interest in the physics of fluidic flow in nanoscale channels, as well as the possibility for high sensitive detection of ions and single molecules is driving the development of nanofluidic channels. The enrichment of charged analytes due to electric field-controlled flow and surface charge/dipole interactions along the channel can lead to enhancement of sensitivity and limits-of-detection in sensor instruments. Nuclear material processing, waste remediation, and nuclear non-prolife… more
Date: June 9, 2011
Creator: Torres, R.; Mendez-Torres, A. & Lam, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Authorization for a process change -- Revision of nuclear safety rules for transporting plutonium compounds between the 231 and 234-5 Buildings

Description: Nuclear safety rules for transporting plutonium compounds between the 231 and 234-5 Buildings were established in Documents HW-30328 and HW-31465. Provisions for the co-transporting of loaded sample cans, filter boats and/or product samples were not included in the above documents. In the interest of economy and efficiency the rules have been reviewed and revised according to the provisions set forth in this document. The paper describes the present transportation limits and the revised limits … more
Date: June 9, 1954
Creator: Smith, A. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Automated Structure Solution with the PHENIX Suite

Description: Significant time and effort are often required to solve and complete a macromolecular crystal structure. The development of automated computational methods for the analysis, solution and completion of crystallographic structures has the potential to produce minimally biased models in a short time without the need for manual intervention. The PHENIX software suite is a highly automated system for macromolecular structure determination that can rapidly arrive at an initial partial model of a stru… more
Date: June 9, 2008
Creator: Zwart, Peter H.; Zwart, Peter H.; Afonine, Pavel; Grosse-Kunstleve, Ralf W.; Hung, Li-Wei; Ioerger, Tom R. et al.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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Axions in String Theory

Description: In the context of string theory, axions appear to provide the most plausible solution of the strong CP problem. However, as has been known for a long time, in many string-based models, the axion coupling parameter Fa is several orders of magnitude higher than the standard cosmological bounds. We re-examine this problem in a variety of models, showing that Fa is close to the GUT scale or above in many models that have GUT-like phenomenology, as well as some that do not. On the other hand, in som… more
Date: June 9, 2006
Creator: Svrcek, Peter; /Stanford U., Phys. Dept. /SLAC; Witten, Edward & /Princeton, Inst. Advanced Study
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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B&D power and water plant modifications and operation after deactivation of D reactors

Description: Pursuant to the decision of the Atomic Energy Commission to deactivate a fourth Hanford production reactor, engineering studies were initiated in regard to the water supply and distribution systems of the smaller production reactor complex. It was the intent of these studies to effect optimization of the water supply and distribution system which would result in a more effective operation and would continue to meet existing standards and requirements. It is the purpose of this report to documen… more
Date: June 9, 1967
Creator: Brinkman, L. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bottom and charm masses and lifetimes at the Tevatron; and a pentaquark search

Description: The Fermilab Tevatron, operating at {radical}s = 1.96 TeV, provides a rich environment for the study of the bottom and charmed hadrons and for searches of other bound states. Presented here are recent measurements of the masses of the following states using fully reconstructed events: B{sup +}, B{sup 0}, B{sub s}, {Lambda}{sub b}, and the neutral B**. Lifetimes from both CDF and D0 in exclusive decays for all of these modes are also presented (sans the B**). A search was conducted at CDF for th… more
Date: June 9, 2003
Creator: Huffman, B. Todd
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Burnup Calculations for Kipt Accelerator Driven Subcritical Facility Using Monte Carlo Computer Codes-Mcb and Mcnpx.

Description: Argonne National Laboratory (ANL) of USA and Kharkov Institute of Physics and Technology (KIPT) of Ukraine have been collaborating on the conceptual design development of an electron accelerator driven subcritical (ADS) facility, using the KIPT electron accelerator. The neutron source of the subcritical assembly is generated from the interaction of 100 KW electron beam with a natural uranium target. The electron beam has a uniform spatial distribution and electron energy in the range of 100 to … more
Date: June 9, 2009
Creator: Gohar, Y.; Zhong, Z. & Talamo, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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