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Office of Scientific & Technical Information Technical Reports
2,843
Congressional Research Service Reports
1,510
Defense Base Closure and Realignment Commission
708
Texas Patents
640
Texas Attorney General Opinions
469
Technical Report Archive and Image Library
339
Government Accountability Office Reports
301
National Advisory Committee for Aeronautics Collection
201
Texas Register
120
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7,144 Matching Results
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Investigation of moisture-induced embrittlement of iron aluminides. Final report
Iron-aluminum alloys with 28 at.% Al and 5 at.% Cr were shown to be susceptible to hydrogen embrittlement by exposure to both gaseous hydrogen and water vapor. This study examined the effect of the addition of zirconium and carbon on the moisture-induced hydrogen embrittlement of an Fe{sub 3}Al,Cr alloy through the evaluation of tensile properties and fatigue crack growth resistance in hydrogen gas and moisture-bearing air. Susceptibility to embrittlement was found to vary with the zirconium content while the carbon addition was found to only affect the fracture toughness. Inherent fatigue crack growth resistance and fracture toughness, as measured in an inert environment, was found to increase with the addition of 0.5 at.% Zr. The combined addition of 0.5 at.% Zr and carbon only increased the fracture toughness. The addition of 1 at.% Zr and carbon was found to have no effect on the crack growth rate when compared to the base alloy. Susceptibility to embrittlement in moisture-bearing environments was found to decrease with the addition of 0.5 at.% Zr. In gaseous hydrogen, the threshold value of the Zr-containing alloys was found to increase above that found in the inert environment while the crack growth resistance was much lower. By …
Date:
June 5, 1997
Creator:
Alven, D. A. & Stoloff, N.S .
Object Type:
Report
System:
The UNT Digital Library
Material characterization of the clay bonded silicon carbide candle filters and ash formations in the W-APF system after 500 hours of hot gas filtration at AEP. Appendix to Advanced Particle Filter: Technical progress report No. 11, January--March 1993
(1) After 500 hours of operation in the pressurized fluidized-bed combustion gas environment, the fibrous outer membrane along the clay bonded silicon carbide Schumacher Dia Schumalith candles remained intact. The fibrous outer membrane did not permit penetration of fines through the filter wall. (2) An approximate 10-15% loss of material strength occurred within the intact candle clay bonded silicon carbide matrix after 500 hours of exposure to the PFBC gas environment. A relatively uniform strength change resulted within the intact candles throughout the vessel (i.e., top to bottom plenums), as well as within the various cluster ring positions (i.e., outer versus inner ring candle filters). A somewhat higher loss of material strength, i.e., 25% was detected in fractured candle segments removed from the W-APF ash hopper. (3) Sulfur which is present in the pressurized fluidized-bed combustion gas system induced phase changes along the surface of the binder which coats the silicon carbide grains in the Schumacher Dia Schumalith candle filter matrix.
Date:
April 5, 1993
Creator:
Alvin, M. A.
Object Type:
Report
System:
The UNT Digital Library
Design of An 18 MW Beam Dump for 500 GeV Electron/Positron Beams at An ILC
This article presents a report on the progress made in designing 18 MW water based Beam Dumps for electrons or positrons for an International Linear Collider (ILC). Multi-dimensional technology issues have to be addressed for the successful design of the Beam Dump. They include calculations of power deposition by the high energy electron/positron beam bunch trains, computational fluid dynamic analysis of turbulent water flow, mechanical design, process flow analysis, hydrogen/oxygen recombiners, handling of radioactive 7Be and 3H, design of auxiliary equipment, provisions for accident scenarios, remote window exchanger, radiation shielding, etc. The progress made to date is summarized, the current status, and also the issues still to be addressed.
Date:
July 5, 2012
Creator:
Amann, John; /SLAC; Arnold, Ray; /SLAC; Seryi, Andrei; /SLAC et al.
Object Type:
Article
System:
The UNT Digital Library
Amarillo College Requests for Legislative Appropriations: 2018 and 2019
Report submitted by Amarillo College to the Texas 85th regular legislature requesting appropriations to fund programming and activities. It includes an overview of the institution's goals, summaries of appropriations requests for fiscal years 2018 and 2019, and supporting documentation.
Date:
August 5, 2016
Creator:
Amarillo College
Object Type:
Book
System:
The Portal to Texas History
Research and Engineering Operation Irradiation Processing Department monthly record report, September 1965
This monthly report details research and engineering operation activities of the Irradiation Processing Department for the month of September 1965.
Date:
October 5, 1965
Creator:
Ambrose, T. W.
Object Type:
Report
System:
The UNT Digital Library
Process of Desulfurizing Oil or Distillate
Patent for a process of desulfurizing oil or distillate.
Date:
July 5, 1904
Creator:
Amend, Otto P.
Object Type:
Patent
System:
The Portal to Texas History
Modal study of refractive effects on x-ray laser coherence
The role of smoothly varying transverse gain and refraction profiles on x-ray laser intensity and coherence is analyzed by modally expanding the electric field within the paraxial approximation. Comparison with a square transverse profile reveals that smooth-edged profiles lead to: (1) a greatly reduced number of guided modes, (2) the continued cancellation of local intensity from a loosely guided mode by resonant free modes, (3) and the absence of extraneous (or anomalous) free mode resonances. These generic spectral properties should enable a considerable simplification in analyzing and optimizing the coherence properties of laboratory soft x-ray lasers. 6 refs., 3 figs.
Date:
April 5, 1991
Creator:
Amendt, P.; London, R.A. (Lawrence Livermore National Lab., CA (USA)) & Strauss, M. (Israel Atomic Energy Commission, Beersheba (Israel). Nuclear Research Center-Negev)
Object Type:
Article
System:
The UNT Digital Library
Congressional Record: Its Production, Distribution, and Accessibility
This report provides information about the Production, Distribution, and Accessibility of Congressional Record. The Congressional Record is the most widely published account of the debates and activities in congress.
Date:
May 5, 2008
Creator:
Amer, Mildred
Object Type:
Report
System:
The UNT Digital Library
The First Day of a New Congress: A Guide to Proceedings on the Senate Floor
The Senate follows a well-established routine on the opening day of a new Congress. The proceedings include swearing in new members, administrative business, and the election of the president pro tempore, the constitutionally mandated officer elected to preside over the chamber in the absence of the Vice President. This report contains information on what is contained in the well-established routine.
Date:
December 5, 2014
Creator:
Amer, Mildred L.
Object Type:
Report
System:
The UNT Digital Library
Secret Sessions of Congress: A Brief Historical Overview
None
Date:
August 5, 2003
Creator:
Amer, Mildred L.
Object Type:
Report
System:
The UNT Digital Library
Women in the United States Congress: 1917-2007
This report identifies the names, committee assignments, dates of service, and (for Representatives) districts of the 244 women who have served in Congress.
Date:
December 5, 2007
Creator:
Amer, Mildred L.
Object Type:
Report
System:
The UNT Digital Library
Insulated Concrete Homes Increase Durability and Energy Efficiency
New houses designed by Mercedes Homes in Melbourne, Florida, with technical support from the U.S. Department of Energy's Building America Program, save their homeowners money by using energy efficient features such as a high performance heat pump and solar control glazing to reduce cooling costs.
Date:
June 5, 2001
Creator:
America, Building; Hendron, B. & Poole, L.
Object Type:
Book
System:
The UNT Digital Library
QMDS: A File System Metadata Management Service Supporting a Graph Data Model-based Query Language
None
Date:
December 5, 2011
Creator:
Ames, S; Gokhale, M B & Maltzahn, C
Object Type:
Article
System:
The UNT Digital Library
Electron electric dipole moment experiment using electric-fieldquantized slow cesium atoms
A proof-of-principle electron electric dipole moment (e-EDM)experiment using slow cesium atoms, nulled magnetic fields, and electricfield quantization has been performed. With the ambient magnetic fieldsseen by the atoms reduced to less than 200 pT, an electric field of 6MV/m lifts the degeneracy between states of unequal lbar mF rbar and,along with the low (approximately 3 m/s) velocity, suppresses thesystematic effect from the motional magnetic field. The low velocity andsmall residual magnetic field have made it possible to induce transitionsbetween states and to perform state preparation, analysis, and detectionin regions free of applied static magnetic and electric fields. Thisexperiment demonstrates techniques that may be used to improve the e-EDMlimit by two orders of magnitude, but it is not in itself a sensitivee-EDM search, mostly due to limitations of the laser system.
Date:
April 5, 2007
Creator:
Amini, Jason M.; Munger Jr., Charles T. & Gould, Harvey.
Object Type:
Article
System:
The UNT Digital Library
Three-dimensional position sensing and field shaping in orthogonal-strip germanium gamma-ray detectors.
None
Date:
January 5, 2000
Creator:
Amman, M. & Luke, P. N.
Object Type:
Article
System:
The UNT Digital Library
Tank characterization report for single-shell tank 241-BX-111
This document summarizes the information on the historical uses, present status, and the sampling and analysis results of waste, stored in Tank 241-BX-111. This report supports the requirements of the Tri-Party Agreement Milestone M-44-ISB.
Date:
May 5, 1998
Creator:
Anantatmula, R. P.
Object Type:
Report
System:
The UNT Digital Library
Filtered cathodic arc deposition with ion-species-selectivebias
A dual-cathode arc plasma source was combined with acomputer-controlled bias amplifier such as to synchronize substrate biaswith the pulsed production of plasma. In this way, bias can be applied ina material-selective way. The principle has been applied to the synthesismetal-doped diamond-like carbon films, where the bias was applied andadjusted when the carbon plasma was condensing, and the substrate was atground when the metal was incorporated. In doing so, excessive sputteringby too-energetic metal ions can be avoided while the sp3/sp2 ratio can beadjusted. It is shown that the resistivity of the film can be tuned bythis species-selective bias. The principle can be extended tomultiple-material plasma sources and complex materials
Date:
October 5, 2006
Creator:
Anders, Andre; Pasaja, Nitisak; Sansongsiri, Sakon & Lim, SunnieH.N.
Object Type:
Article
System:
The UNT Digital Library
Electrochromically switched, gas-reservoir metal hydride devices with application to energy-efficient windows
Proof-of-principle gas-reservoir MnNiMg electrochromic mirror devices have been investigated. In contrast to conventional electrochromic approaches, hydrogen is stored (at low concentration) in the gas volume between glass panes of the insulated glass units (IGUs). The elimination of a solid state ion storage layer simplifies the layer stack, enhances overall transmission, and reduces cost. The cyclic switching properties were demonstrated and system durability improved with the incorporation a thin Zr barrier layer between the MnNiMg layer and the Pd catalyst. Addition of 9 percent silver to the palladium catalyst further improved system durability. About 100 full cycles have been demonstrated before devices slow considerably. Degradation of device performance appears to be related to Pd catalyst mobility, rather than delamination or metal layer oxidation issues originally presumed likely to present significant challenges.
Date:
May 5, 2008
Creator:
Anders, Andre; Slack, Jonathan L. & Richardson, Thomas J.
Object Type:
Article
System:
The UNT Digital Library
Baling-Press.
Patent for a baling-press meant to bale cotton. In this machine, "the power as applied to the plunger is increased in proportion to the resistance offered by the material being baled and whereby the forward movement of the plunger is automatically checked at the limit of its path and is returned to its initial positioin without effort upon the part of the operator" (lines 10-17).
Date:
January 5, 1897
Creator:
Anderson, Alva E.
Object Type:
Patent
System:
The Portal to Texas History
Baling-Press.
Patent for a baling-press for cotton and uses a compression chamber and a head or compressor block to compress the cotton. The invention is more effective and more expeditious than other baling-presses.
Date:
June 5, 1894
Creator:
Anderson, Alva E.
Object Type:
Patent
System:
The Portal to Texas History
The human DNA-activated protein kinase, DNA-PK: Substrate specificity
Although much has been learned about the structure and function of p53 and the probable sequence of subsequent events that lead to cell cycle arrest, little is known about how DNA damage is detected and the nature of the signal that is generated by DNA damage. Circumstantial evidence suggests that protein kinases may be involved. In vitro, human DNA-PK phosphorylates a variety of nuclear DNA-binding, regulatory proteins including the tumor suppressor protein p53, the single-stranded DNA binding protein RPA, the heat shock protein hsp90, the large tumor antigen (TAg) of simian virus 40, a variety of transcription factors including Fos, Jun, serum response factor (SRF), Myc, Sp1, Oct-1, TFIID, E2F, the estrogen receptor, and the large subunit of RNA polymerase II (reviewed in Anderson, 1993; Jackson et al., 1993). However, for most of these proteins, the sites that are phosphorylated by DNA-PK are not known. To determine if the sites that were phosphorylated in vitro also were phosphorylated in vivo and if DNA-PK recognized a preferred protein sequence, the authors identified the sites phosphorylated by DNA-PK in several substrates by direct protein sequence analysis. Each phosphorylated serine or threonine is followed immediately by glutamine in the polypeptide chain; at no …
Date:
November 5, 1994
Creator:
Anderson, C.W.; Connelly, M.A.; Zhang, H.; Sipley, J.A.; Lees-Miller, S.P.; Lintott, L.G. et al.
Object Type:
Report
System:
The UNT Digital Library
Relativistic-klystron two-beam accelerator as a power source for future linear colliders
The technical challenge for making two-beam accelerators into realizable power sources for high-energy colliders lies in the creation of the drive beam and in its propagation over long distances through multiple extraction sections. This year we have been constructing a 1.2&A, l-MeV, induction gun for a prototype relativistic klystron two-beam accelerator (RK-TBA). The electron source will be a 8.9 cm diameter, thermionic, flat-surface cathode with a maximum shroud field stress of approximately 165 kV/cm. Additional design parameters for the injector include a pulse length of over 150-ns flat top (1% energy variation), and a normalized edge emittance of less than 300 pi-mm-n-n. The prototype accelerator will be used to study physics, engineering, and costing issues involved in the application of the RK-TBA concept to linear colliders. We have also been studying optimization parameters, such as frequency, for the application of the RK-TBA concept to multi-TeV linear colliders. As an rf power source the RK-TBA scales favorably up to frequencies around 35 GHz. An overview of this work with details of the design and performance of the prototype injector, beam line, and diagnostics will be presented.
Date:
October 5, 1998
Creator:
Anderson, D. E.; Eylon, S.; Henestroza, E.; Houck, T. L.; Lidia, M.; Vanecek, D. L. et al.
Object Type:
Article
System:
The UNT Digital Library
Progress on the relativistic klystron two-beam accelerator prototype
The technical challenge for making two-beam accelerators into realizable power sources lies in the creation of the drive beam and in its propagation over long distances through multiple extraction sections. This year we have been constructing a 1.2-kA, l-MeV, electron induction prototype injector as a collaborative effort between LBL and LLNL. The electron source will be a 3.5"-diameter, thermionic, flat-surface cathode with a maximum shroud field stress of approximately 165 kV/cm. Additional design parameters for the injector include a pulse length of over 120-ns flat top (1% energy variation), and a normalized edge emittance of less than 200 {pi}-mm-mr. Planned diagnostics include an isolated cathode with resistive divider for direct measurement of current emission, resistive-wall and magnetic probe current monitors for measuring beam current and centroid position, capacitive probes for measuring A-K gap voltage, an energy spectrometer, and a pepper-pot emittance diagnostic. Details of the injector, beam line, and diagnostics are presented.
Date:
July 5, 1998
Creator:
Anderson, D. E.; Eylon, S.; Henestroza, E.; Houck, T. L.; Lidia, S. M.; Vanecek, D. L. et al.
Object Type:
Article
System:
The UNT Digital Library
1996-2004 Trends in the Single-Family Housing Market: Spatial Analysis of the Residential Sector
This report provides a detailed geographic analysis of two specific topics affecting the residential sector. First, we performed an analysis of new construction market trends using annual building permit data. We report summarized tables and national maps to help illustrate market conditions. Second, we performed a detailed geographic analysis of the housing finance market. We analyzed mortgage application data to provide citable statistics and detailed geographic summarization of the residential housing picture in the US for each year in the 1996-2004 period. The databases were linked to geographic information system tools to provide various map series detailing the results geographically. Looking at these results geographically may suggest potential new markets for TD programs addressing the residential sector that have not been considered previously. For example, we show which lenders affect which regions and which income or mortgage product classes. These results also highlight the issue of housing affordability. Energy efficiency R&D programs focused on developing new technology for the residential sector must be conscious of the costs of products resulting from research that will eventually impact the home owner or new home buyer. Results indicate that home values as a proportion of median family income in Building America communities are …
Date:
September 5, 2006
Creator:
Anderson, Dave M. & Elliott, Douglas B.
Object Type:
Report
System:
The UNT Digital Library