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Office of Scientific & Technical Information Technical Reports
566
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95
Defense Base Closure and Realignment Commission
87
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70
Texas Patents
55
Texas Laws and Resolutions Archive
54
Texas Attorney General Opinions
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31
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Measurement of the Inclusive Isolated Prompt Photon Cross-Section in $Pp$ Collisions at $\sqrt{s}=7$ TeV Using 35 Pb-1 of ATLAS Data
None
Date:
May 31, 2013
Creator:
Aad, Georges
Object Type:
Article
System:
The UNT Digital Library
Measurement of the Pseudorapidity and Transverse Momentum Dependence of the Elliptic Flow of Charged Particles in Lead-Lead Collisions at $\sqrt{s_{NN}}=2.76$ TeV with the ATLAS Detector
None
Date:
May 31, 2013
Creator:
Aad, Georges
Object Type:
Article
System:
The UNT Digital Library
B physics: first evidence for b_s0 --> phi phi decay and measurements of branching ratio and a_cp for b+ --> phi k+
We present the first evidence of charmless decays of the B{sub s}{sup 0} meson, the decay B{sub s}{sup 0} {yields} {phi}{phi}, and a measurement of the Branching Ratio BR(B{sub s}{sup 0} {yields} {phi}{phi}) using 180 pb{sup -1} of data collected by the CDF II experiment at the Fermilab Tevatron collider. In addition, the BR and direct CP asymmetry for the B{sup +} {yields} {phi}K{sup +} decay are measured.
Date:
May 31, 2005
Creator:
Acosta, D.
Object Type:
Report
System:
The UNT Digital Library
DEVELOPMENT OF IMPROVED CATALYSTS FOR THE SELECTIVE CATALYTIC REDUCTION OF NITROGEN OXIDES WITH HYDROCARBONS
Significant work has been done by the investigators on the cerium oxide-copper oxide based sorbent/catalysts for the combined removal of sulfur and nitrogen oxides from the flue gases of stationary sources. A relatively wide temperature window was established for the use of alumina-supported cerium oxide-copper oxide mixtures as regenerable sorbents for SO{sub 2} removal. Preliminary evaluation of these sorbents as catalysts for the selective reduction of NO{sub x} gave promising results with ammonia, but indicated low selectivity when methane was used as the reductant. Since the replacement of ammonia by another reductant is commercially very attractive, in this project, four research components will be undertaken. The investigation of the reaction mechanism, the first component, will help in the selection of promoters to improve the catalytic activity and selectivity of the sorbents in the SCR with methane. This will result in new catalyst formulations (second component). If this research is successful, the combined SO{sub 2}-NO{sub x} removal process based on alumina-supported copper oxide-ceria sorbent/catalysts will become very attractive for commercial applications. The objective of the third component of the project is to develop an alternative SCR process using another inexpensive fuel, residual fuel oil, instead of natural gas. This innovative proposal …
Date:
May 31, 2001
Creator:
Akyurtlu, Dr. Ates & Akyurtlu, Dr. Jale F.
Object Type:
Report
System:
The UNT Digital Library
Enhancing the US Power Infrastructure
The primary motivation for this set of research activities was to develop a foundation in several aspects of power in order to position Cleveland State University to lead a multiuniversity effort to secure funding for enhanced power system projects and to be able to eventually secure a NASA Space Power Systems Center status through the competitive bidding process. This was accomplished by focusing on these major project areas, (1) the design of the next generation nuclear-electric power generation system, (2) the design of a distributed, fault-tolerant, and modular power system, and (3) the development of the dynamics and control of active magnetic bearings for flywheel energy storage without using conventional sensors.
Date:
May 31, 2010
Creator:
Alexander, Charles
Object Type:
Report
System:
The UNT Digital Library
Crack growth rates of nickel alloy welds in a PWR environment.
In light water reactors (LWRs), vessel internal components made of nickel-base alloys are susceptible to environmentally assisted cracking. A better understanding of the causes and mechanisms of this cracking may permit less conservative estimates of damage accumulation and requirements on inspection intervals. A program is being conducted at Argonne National Laboratory to evaluate the resistance of Ni alloys and their welds to environmentally assisted cracking in simulated LWR coolant environments. This report presents crack growth rate (CGR) results for Alloy 182 shielded-metal-arc weld metal in a simulated pressurized water reactor (PWR) environment at 320 C. Crack growth tests were conducted on 1-T compact tension specimens with different weld orientations from both double-J and deep-groove welds. The results indicate little or no environmental enhancement of fatigue CGRs of Alloy 182 weld metal in the PWR environment. The CGRs of Alloy 182 in the PWR environment are a factor of {approx}5 higher than those of Alloy 600 in air under the same loading conditions. The stress corrosion cracking for the Alloy 182 weld is close to the average behavior of Alloy 600 in the PWR environment. The weld orientation was found to have a profound effect on the magnitude of crack growth: …
Date:
May 31, 2006
Creator:
Alexandreanu, B.; Chopra, O. K.; Shack, W. J. & Technology, Energy
Object Type:
Report
System:
The UNT Digital Library
Seca Coal-Based Systems Program
This report summarizes the progress made during the August 1, 2006 - May 31, 2008 award period under Cooperative Agreement DE-FC26-05NT42614 for the U. S. Department of Energy/National Energy Technology Laboratory (USDOE/NETL) entitled 'SECA Coal Based Systems'. The initial overall objective of this program was to design, develop, and demonstrate multi-MW integrated gasification fuel cell (IGFC) power plants with >50% overall efficiency from coal (HHV) to AC power. The focus of the program was to develop low-cost, high performance, modular solid oxide fuel cell (SOFC) technology to support coal gas IGFC power systems. After a detailed GE internal review of the SOFC technology, the program was de-scoped at GE's request. The primary objective of this program was then focused on developing a performance degradation mitigation path for high performing, cost-effective solid oxide fuel cells (SOFCs). There were two initial major objectives in this program. These were: (1) Develop and optimize a design of a >100 MWe integrated gasification fuel cell (IGFC) power plant; (2) Resolve identified barrier issues concerning the long-term economic performance of SOFC. The program focused on designing and cost estimating the IGFC system and resolving technical and economic barrier issues relating to SOFC. In doing so, manufacturing …
Date:
May 31, 2008
Creator:
Alinger, Matthew
Object Type:
Report
System:
The UNT Digital Library
Electronic Properties of LiFePO4 and Li doped LiFePO4
LiFePO{sub 4} has several potential advantages in comparison to the transition metal oxide cathode materials used in commercial lithium-ion batteries. However, its low intrinsic electronic conductivity ({approx} 10{sup -9} S/cm) is problematic. We report here a study by soft x-ray absorption/emission spectroscopy of the electronic properties of undoped LiFePO{sub 4} and Li-doped LiFePO{sub 4} in which Li{sup +} ions are substituted for Fe{sup 2+} ions in an attempt to increase the intrinsic electronic conductivity. The conductivities of the Li{sub 1+x}Fe{sub 1-x}PO{sub 4} samples were, however, essentially unchanged from that of the undoped LiFePO{sub 4}. Nonetheless, evidence for changing the electronic properties of LiFePO{sub 4} by doping with excess Li+ was observed by the XAS/XES spectroscopy. New pre-edge features the O-1s XAS spectrum of Li{sub 1.05}Fe{sub 0.95}PO4 is a direct indication that the charge compensation for substitution of Fe{sup 2+} by Li{sup +} resides in the unoccupied O-2p orbitals. A charge transfer (CT) excitation was also observed in the doped material implying that the unoccupied O-2p orbitals created by doping are strongly hybridized with unoccupied Fe-3d orbitals of neighboring sites. However, the strong covalent bonding within the (PO{sub 4}){sup 3-} anions and the large separation of the Fe cations means that …
Date:
May 31, 2006
Creator:
Allen, J.L.; Zhuang, G.V.; Ross, P.N.; Guo, J.-H. & Jow, T.R.
Object Type:
Article
System:
The UNT Digital Library
Can-Opener.
Patent for a can opener, which has a movable blade to allow for easy cleaning.
Date:
May 31, 1910
Creator:
Allen, Jasper McDonnel
Object Type:
Patent
System:
The Portal to Texas History
THREE NEW DELAYED ALPHA EMITTERS OF LOW MASS
Two new positron active isotopes, B{sup 8} and Na{sup 20}, have been found to decay to excited states of Be{sup 8} and Ne{sup 20}, which in turn decay 'instantaneously' by alpha emission. Their half-lives are 0.65 {+-} 0.1 sec. and 1/4 sec. respectively. N{sup 12} is also found to have a low energy positron group which leads to an {alpha}-unstable excited state in C{sup 12}. The masses of B{sup 8} and Na{sup 20} are 8.027 and 20.015 respectively. B{sup 8} decays by a 13.7 {+-} 0.3 Mev positron, through the same excited state of Be{sup 8} as does Li{sup 8}. Estimates of the energies of the excited state in C{sup 12} and Ne{sup 20} are made.
Date:
May 31, 1950
Creator:
Alvarez, Luis W.
Object Type:
Report
System:
The UNT Digital Library
Membership of the 109th Congress: A Profile
This report presents a profile of the membership of the 109th Congress. Statistical information is included on selected characteristics of Members. This includes data on party affiliation; average age and length of service; occupation; religious affiliation; female and minority Members; foreign-born Members; and military service.
Date:
May 31, 2005
Creator:
Amer, Mildred L.
Object Type:
Report
System:
The UNT Digital Library
New Heterogeneous Catalysts for the Selective Reduction of NOx under Lean Conditions. Final Report
The original goal of this program was the identification and design of new noble-metal-based catalysts for the selective catalytic reduction of nitric oxide by hydrocarbons under excess oxygen (i.e., ''lean'') conditions (HC-SCR). Work conducted in the first funding cycle of this award (i.e., 1997-2000) was successful in allowing us to develop an understanding of the fundamental surface chemistry taking place during the adsorption and reaction of nitrogen oxides and propylene on the surface of supported noble metal catalysts. Both experimental results collected in our own group as well as molecular simulation results published by Professor Neurock suggested that in order to improve the performance of the Pt catalysts--in terms of the nitrogen selectivity and the temperature window of operation-- it was necessary to introduce a second metal. However, synthesizing such catalysts with the metals of interest (i.e., Pt-Au, Pt-Ru, Pt-Rh, etc.) with some degree of control of the structure and composition of the resulting supported metal particles is in itself a research challenge. Consequently, the bulk of our efforts during the second funding cycle of this award (covered by this report) was shifted to the use of organometallic cluster precursors for the synthesis on novel bimetallic catalysts. During this time …
Date:
May 31, 2004
Creator:
Amiridis, M. D.
Object Type:
Report
System:
The UNT Digital Library
Mid-Atlantic Wind - Overcoming the Challenges
This study, supported by the US Department of Energy, Wind Powering America Program, Maryland Department of Natural Resources and Chesapeake Bay Foundation, analyzed barriers to wind energy development in the Mid-Atlantic region along with options for overcoming or mitigating them. The Mid-Atlantic States including Delaware, Maryland, North Carolina and Virginia, have excellent wind energy potential and growing demand for electricity, but only two utility-scale projects have been installed to date. Reasons for this apathetic development of wind resources were analyzed and quantified for four markets. Specific applications are: 1) Appalachian mountain ridgeline sites, 2) on coastal plains and peninsulas, 3) at shallow water sites in Delaware and Chesapeake Bays, Albemarle and Pamlico Sounds, and 4) at deeper water sites off the Atlantic coast. Each market has distinctly different opportunities and barriers. The primary barriers to wind development described in this report can be grouped into four categories; state policy and regulatory issues, wind resource technical uncertainty, economic viability, and public interest in environmental issues. The properties of these typologies are not mutually independent and do interact. The report concluded that there are no insurmountable barriers to land-based wind energy projects and they could be economically viable today. Likewise potential sites …
Date:
May 31, 2012
Creator:
Ancona, Daniel F., III; George, Kathryn E.; Bowers, Richard P.; Sparling, Dr. Lynn; Buckheit, Bruce & LoBue, Daniel
Object Type:
Report
System:
The UNT Digital Library
Investigation of physical structures and interactions at high energy. Progress report, June 1, 192--May 31, 1992
This report contains discussions on the following topics: Experimental program at the Fermilab Tevatron Collider: FNAL E-740; Experimental program at the superconducting super collider: Solenoidal detector collaboration; Computation development program at Iowa State University: Batch after twilight running and parallel processing; Experimental program at the University of Hawaii: Deep underwater muon and neutrino detector; Global analysis of parton distributions; high energy direct photon production; photon fragmentation functions; single transverse-spin asymmetry; associated production of Higgs Boson at collider energies; Cronin effect in photoproduction and deeply inelastic scattering; and heavy meson production.
Date:
May 31, 1993
Creator:
Anderson, W. E.; Hauptman, J. M. & Qui, J.
Object Type:
Report
System:
The UNT Digital Library
Wick Trimmer.
Patent for a new and improved wick trimmer. This design "is to provide a lamp-wick trimmer with adjustable guides that will afford means to retain the implement in correct position for use on lamp-wick tubes of different sizes, and furthermore to furnish the wick-trimmer with blades that will shear the wick from each side edge toward the center simultaneously" (lines 7-14).
Date:
May 31, 1892
Creator:
Andrews, Daniel L.
Object Type:
Patent
System:
The Portal to Texas History
Simulation of Hypervelocity Penetration in Limestone
A parameter study was performed to examine the (shock) damage obtained with long-rod and spherical mono-material penetrators impacting two varieties of limestone. In all cases, the impacts were assumed to be normal to the plane of the rock and at zero angle of attack (in the case of the rods). Impact velocities ranged to 15 km/s but most calculations were performed at 4 and 6 km/s and the penetrator mass was fixed at 1000 kg. For unlined underground structures, incipient damage was defined to occur when the peak stress, {sigma}{sub pk}, exceeds 1 kb (100 MPa) and the applied impulse per unit area, I{sub pk}, exceeds 1 ktap (1 kb-{micro}s). Severe damage was assumed to occur when {sigma}{sub pk} exceeds 1 kb and I{sub pk} exceeds 1000 ktaps. Using the latter definition it was found that severe damage in hard, non-porous limestone with spherical impactors extended to a depth of 9 m on-axis for an impact velocity of 4 km/s and 12 m at 6 km/s. Cylinders with length-to-diameter (L/D) ratio of 8.75 achieved depth to severe damage of 23 m and 40 m, respectively under the same conditions. For a limestone medium with 2% initial gas porosity, the latter …
Date:
May 31, 2005
Creator:
Antoun, T; Glenn, L; Walton, O; Goldstein, P; Lomov, I & Liu, B
Object Type:
Article
System:
The UNT Digital Library
Advanced Building Efficiency Testbed Initiative/Intelligent Workplace Energy Supply System; ABETI/IWESS
ABETI/IWESS is a project carried out by Carnegie Mellon's Center for Building Performance and Diagnostics, the CBPD, supported by the U.S. Department of Energy/EERE, to design, procure, install, operate, and evaluate an energy supply system, an ESS, that will provide power, cooling, heating and ventilation for CBPD's Intelligent Workplace, the IW. The energy sources for this system, the IWESS, are solar radiation and bioDiesel fuel. The components of this overall system are: (1) a solar driven cooling and heating system for the IW comprising solar receivers, an absorption chiller, heat recovery exchanger, and circulation pump; (2) a bioDiesel fueled engine generator with heat recovery exchangers, one on the exhaust to provide steam and the other on the engine coolant to provide heated water; (3) a ventilation system including an enthalpy recovery wheel, an air based heat pump, an active desiccant wheel, and an air circulation fan; and (4) various convective and radiant cooling/heating units and ventilation air diffusers distributed throughout the IW. The goal of the ABETI/IWESS project is to demonstrate an energy supply system for a building space that will provide a healthy, comfortable environment for the occupants and that will reduce the quantity of energy consumed in the …
Date:
May 31, 2008
Creator:
Archer, David H.; Betz, Frederik; Gu, Yun; Li, Rong; Marion, Flore; Masson, Sophie et al.
Object Type:
Report
System:
The UNT Digital Library
American Recovery and Reinvestment Act ( ARRA) FEMP Technical Assistance, U.S. General Services Administration - Project 194 U.S. Custom Cargo Inspection Facility, Detroit, MI
This report documents the findings of an on-site audit of the U.S. Customs Cargo Inspection Facility (CIF) in Detroit, Michigan. The federal landlord for this building is the General Services Administration (GSA). The focus of the audit was to identify various no-cost or low-cost energy-efficiency opportunities that, once implemented, would reduce electrical and gas consumption and increase the operational efficiency of the building. This audit also provided an opportunity to identify potential capital cost projects that should be considered in the future to acquire additional energy (electric and gas) and water savings to further increase the operational efficiency of the building.
Date:
May 31, 2010
Creator:
Arends, J. & Sandusky, William F.
Object Type:
Report
System:
The UNT Digital Library
American Recovery and Reinvestment Act (ARRA) FEMP Technical Assistance US General Serices Administration - Project 193, John W. Bricker Federal Building, Columbus, OH
This report documents the findings from an onsite audit of the John W. Bricker Federal building located in Columbus, Ohio. The Federal landlord for this building is the General Services Administration (GSA). The focus of the audit was to identify various no-cost or low-cost energy efficiency opportunities that, once implemented, would either reduce electrical and gas consumption or increase the operational efficiency of the building. This audit also provided an opportunity to identify potential capital cost projects that should be considered in the future to acquire additional energy (electric and gas) and water savings to further increase the operational efficiency of the building.
Date:
May 31, 2010
Creator:
Arends, J. & Sandusky, William F.
Object Type:
Report
System:
The UNT Digital Library
Next Generation Engineered Materials for Ultra Supercritical Steam Turbines
To reduce the effect of global warming on our climate, the levels of CO{sub 2} emissions should be reduced. One way to do this is to increase the efficiency of electricity production from fossil fuels. This will in turn reduce the amount of CO{sub 2} emissions for a given power output. Using US practice for efficiency calculations, then a move from a typical US plant running at 37% efficiency to a 760 C /38.5 MPa (1400 F/5580 psi) plant running at 48% efficiency would reduce CO2 emissions by 170kg/MW.hr or 25%. This report presents a literature review and roadmap for the materials development required to produce a 760 C (1400 F) / 38.5MPa (5580 psi) steam turbine without use of cooling steam to reduce the material temperature. The report reviews the materials solutions available for operation in components exposed to temperatures in the range of 600 to 760 C, i.e. above the current range of operating conditions for today's turbines. A roadmap of the timescale and approximate cost for carrying out the required development is also included. The nano-structured austenitic alloy CF8C+ was investigated during the program, and the mechanical behavior of this alloy is presented and discussed as an …
Date:
May 31, 2006
Creator:
Arrell, Douglas
Object Type:
Report
System:
The UNT Digital Library
Conceptual Design Study of a Mobile Gamma Irradiator for Fruit Produce
From introduction: This report covers the results of a study of a mobile irradiator for fruit grown in California.
Date:
May 31, 1962
Creator:
Associated Nucleonics (Garden City, N.Y.)
Object Type:
Report
System:
The UNT Digital Library
Gas-Phase Radiolysis of Propane
Abstract. the direct and inert-gas radiolysis, as well as the vacuum ultra-violet photolysis of CD3CH2CD3, CH3CD2CH3 and C3H2+C3D3 mixtures have been investigated in the presence of radical scavengers. The major conclusions are : (a) at atmospheric pressures, neutral propane decomposition contributes to the observed products although to a lesser extent than parent ion decompositions ; (b) a variation in pressure has a pronounced effect on the fragmentation of the parent ion ; (c) the hydrogen atoms in the ethyl ion are randomized in the direct as well as in the inert-gas sensitized radiolysis ; (d) rearrangement in the parent ion is of minor importance in the radiolysis ; (e) although the formation of propylene is related to the propyl ion, it is not necessarily produced by the neutralization of this ion.
Date:
May 31, 1963
Creator:
Ausloos, Pierre J.; Lias, Sharon G., 1935- & Sandoval, L. B., (Mrs.)
Object Type:
Report
System:
The UNT Digital Library
Vacuum Deposition System
The Physics Section vacuum deposition system is available for several types of thin film techniques. This vacuum evaporation system operates in the high vacuum range. The evaporation source is a resistive heating element, either a boat or a filament design. Coating is then line of sight from the source. Substrates to be coated can have a maximum diameter of 17 inches. At this time the variations in the thickness of the coatings can be controlled, by monitor, to within about 100 angstroms. The system diagrams follow the Operation Procedures and the Sample Coating Procedures provided in this document. 3 figs.
Date:
May 31, 1990
Creator:
Austin, Sharon & Bark, Dan
Object Type:
Report
System:
The UNT Digital Library
Monthly Progress Report No. 61 for May, 1948
This is the University of California, Radiation Laboratory monthly progress report for May 1948. It discusses the following: (1) 184-inch Cyclotron Program; (2) 60-inch Cyclotron Program; (3) Synchrotron Program; (4) Linear Accelerator Program; (5) Experimental Physics; (6) Theoretical Physics, (7) Isotope Separation Program; (8) Chemistry Departments; (9) Medical Physics; and (10) Health Physics and Chemistry.
Date:
May 31, 1948
Creator:
Authors, Various
Object Type:
Report
System:
The UNT Digital Library