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Office of Scientific & Technical Information Technical Reports
315
Congressional Research Service Reports
133
Texas Patents
52
Government Accountability Office Reports
43
Technical Report Archive and Image Library
36
Texas Attorney General Opinions
36
National Advisory Committee for Aeronautics Collection
20
Texas Register
10
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Hydrogen Permeability of Mulitphase V-Ti-Ni Metallic Membranes
None
Date:
February 14, 2006
Creator:
ADAMS, THAD
Object Type:
Article
System:
The UNT Digital Library
Flight Comparison of Performance and Cooling Characteristics of Exhaust-Ejector Installation with Exhaust-Collector-Ring Installation
Flight and ground investigations have been made to compare an exhaust-ejector installation with a standard exhaust-collector-ring installation on air-cooled aircraft engines in a twin-engine airplane. The ground investigation allowed that, whereas the standard engine would have overheated above 600 horsepower, the engine with exhaust ejectors cooled at take-off operating conditions at zero ram. The exhaust ejectors provided as much cooling with cowl flaps closed as the conventional cowl flaps induced when full open at low airspeeds. The propulsive thrust of the exhaust-ejector installation was calculated to be slightly less than the thrust of the collector-ring-installation.
Date:
February 14, 1947
Creator:
Acker, Loren W. & Kleinknecht, Kenneth S.
Object Type:
Report
System:
The UNT Digital Library
Equilibrium Adsorption of Krypton and Xenon on Activated Carbon and Linde Molecular Sieves
Equilibrium krypton and xenon adsorption isotherms were obtained for four varieties of charcoal and for Linde Molecular Sieves Types 4A and 5A, generally at 0, 25, and 60°c. Such data are of interest in connection with design and evaluation of adsorbers for radioactive noble gas fission products. The isotherms were fitted, by linear regression analysis, to straight-line forms of the Freundlich and Langmuir equations. The Freundlich linear equation gave the better fit and the parameters of this equation are presented for each of the isotherms. Also presented are the constants for an equation representing the temperature dependence of arbitrary adsorption coefficients, the coefficients having been calculated from the Freundlich isotherm parameters. Some aspects of the applicability and accuracy of these results are discussed.
Date:
February 14, 1961
Creator:
Ackley, R. D. & Browning, W. E., Jr.
Object Type:
Report
System:
The UNT Digital Library
Israel: Background and U.S. Relations
This report explores the history of U.S.-Israeli relationships and current Israeli issues such as border security, defense, Israel-Palestinian conflicts, economy, and democracy.
Date:
February 14, 2011
Creator:
Addis, Casey L.
Object Type:
Report
System:
The UNT Digital Library
CRADA Final Report: Process development for hybrid solar cells
TCF funding of a CRADA between LBNL and RSLE leveraged RSLE's original $1M investment in LBNL research and led to development of a solar cell fabrication process that will bring the high efficiency, high voltage hybrid tandem solar cell closer to commercialization. RSLE has already built a pilot line at its Phoenix, Arizona site.
Date:
February 14, 2011
Creator:
Ager, Joel W.
Object Type:
Report
System:
The UNT Digital Library
European Union–U.S. Trade and Investment Relations: Key Issues
None
Date:
February 14, 2008
Creator:
Aheam, Raymond J.; Fischer, John W.; Goldfarb, Charles B.; Hanrahan, Charles E.; Eubanks, Walter W. & Rubin, Janice E.
Object Type:
Report
System:
The UNT Digital Library
Oxygen Isotopes in Chondritic Interplanetary Dust: Parent-Bodies and Nebular Oxygen Reservoirs
Planetary objects have preserved various amounts of oxygen issued from isotopically different oxygen reservoirs reflecting their origin and physico-chemical history. An {sup 16}O-rich component is preserved in refractory inclusions (CAIs) whereas meteorites matrices are enriched in an {sup 16}O-poor component. The origin of these components is still unclear. The most recent models are based on isotope selective photodissociation of CO in a {sup 16}O-rich nebula/presolr cloud resulting in a {sup 16}O-poor gas in the outer part of the nebula. However because most meteorite components are thought to be formed in the inner 3AU of the solar nebula, the precise isotopic composition of outer solar system components is yet unknown. In that respect, the oxygen isotopic composition of cometary dust is a key to understand the origin of the solar system. The Stardust mission will bring back to the Earth dust samples from comet Wild2, a short period comet from the Jupiter family. A precise determination of the oxygen isotope composition of Wild2 dust grains is essential to decipher the oxygen reservoirs of the outer solar system. However, Stardust samples may be extremely fragmented upon impact in the collector. In addition, interplanetary dust particles (IDPs) collected in the stratosphere are likely …
Date:
February 14, 2006
Creator:
Aleon, J.; McKeegan, K. D. & Leshin, L.
Object Type:
Article
System:
The UNT Digital Library
Churn.
Patent for an improved and simple churn that works easily and quickly. It "is adapted to permit of the simultaneous securing and retention of the cream vessel or receptacle in position in its journaling or carrying frame, as well as the cover upon said vessel, and to provide for the ready removal of said vessel or receptacle and its said cover preparatory to removing the contents of the vessel or the cleaning thereof" (lines 18-25).
Date:
February 14, 1893
Creator:
Alexander, Horace C.
Object Type:
Patent
System:
The Portal to Texas History
Studies of vibrational properties in Ga stabilized delta-Pu by extended X-ray absorption fine structure
Temperature dependent extended x-ray absorption fine structure (EXAFS) spectra were measured for a 3.3 at. % Ga stabilized Pu alloy over the range T= 20 - 300 K. EXAFS data were acquired at both the Ga K-edge and the Pu L{sub III} edge. Curve-fits were performed to the first shell interactions to obtain pair-distance distribution widths, {sigma}, as a function of temperature. The temperature dependence of {sigma}(T) was accurately modeled using a correlated-Debye model for the lattice vibrational properties, suggesting Debye-like behavior in this material. Using this formalism, we obtain pair-specific correlated-Debye temperatures, {Theta}{sub cD}, of 110.7 {+-} 1.7 K and 202.6 {+-} 3.7 K, for the Pu-Pu and Ga-Pu pairs, respectively. The result for the Pu-{Theta}{sub cD} value compares well with previous vibrational studies on {delta}-Pu. In addition, our results represent the first unambiguous determination of Ga-specific vibrational properties in Pu-Ga alloys, i.e, {Theta}{sub cD} for the Ga-Pu pair. Because the Debye temperature can be related to a measure of the lattice stiffness, these results indicate the Ga-Pu bonds are significantly stronger than the Pu-Pu bonds. This effect has important implications for lattice stabilization mechanisms in these alloys.
Date:
February 14, 2002
Creator:
Allen, P. G.; Henderson, A. L.; Sylwester, E. R.; Turchi, P. E. A.; Shen, T. H.; Gallegos, G. F. et al.
Object Type:
Article
System:
The UNT Digital Library
Analysis of 2012 Meteorological Data from the Knolls Atomic Power Laboratory and Kesselring Site Operations Facilities
None
Date:
February 14, 2013
Creator:
Aluzzi, F J
Object Type:
Report
System:
The UNT Digital Library
Temperature Study of CdZnTe Coplanar-Grid Detectors
The coplanar-grid (CPG) and other electron only detection techniques have made possible the use of CdZnTe-based detectors for gamma-ray spectroscopy when high efficiency, good energy resolution, and near room temperature operation are required. Despite the demonstrated potential of the technologies, widespread use remains hampered in part by the limited availability of the highly uniform CdZnTe material required for high-resolution spectroscopy. However, it has been recently shown that mild cooling of CdZnTe CPG detectors can result in a significant improvement in the energy resolution of the detectors thereby allowing a wider range of material to be used for high-resolution applications. In this paper, we show that improved spectroscopic performance can consistently be achieved through a combination of detector cooling and increased detector bias. Energy resolutions of about 1 % FWHM at 662 keV for detector volumes up to 2.3 cm{sup 3} have been obtained at -20 C. With the electronic noise subtracted, this amounts to an intrinsic resolution of 0.76 %. We also show that further cooling of the detectors to -30 C leads to field polarization and a loss of spectroscopic performance.
Date:
February 14, 2006
Creator:
Amman, Mark; Lee, Julie S. & Luke, Paul N.
Object Type:
Article
System:
The UNT Digital Library
A Dynamically Adaptive Arbitrary Lagrangian-Eulerian Method for Solution of the Euler Equations
A new method that combines staggered grid arbitrary Lagrangian-Eulerian (ALE) techniques with structured local adaptive mesh refinement (AMR) has been developed for solution of the Euler equations. The novel components of the methods are driven by the need to reconcile traditional AMR techniques with the staggered variables and moving, deforming meshes associated with Lagrange based ALE schemes. We develop interlevel solution transfer operators and interlevel boundary conditions first in the case of purely Lagrangian hydrodynamics, and then extend these ideas into an ALE method by developing adaptive extensions of elliptic mesh relaxation techniques. Conservation properties of the method are analyzed, and a series of test problem calculations are presented which demonstrate the utility and efficiency of the method.
Date:
February 14, 2003
Creator:
Anderson, R W; Elliott, N S & Pember, R B
Object Type:
Article
System:
The UNT Digital Library
The Value of Energy Storage for Direct-Replacement Solar Thermal Power Plants
None
Date:
February 14, 1978
Creator:
Anderson, T.; Kaplan, S. & Wilson, J.
Object Type:
Article
System:
The UNT Digital Library
Tree and Brush Cutter.
Patent for a motorized tree and brush cutter that is portable.
Date:
February 14, 1911
Creator:
Andrews, Robert Lyle
Object Type:
Patent
System:
The Portal to Texas History
On-Machine Acceptance
Probing processes are used intermittently and not effectively as an on-line measurement device. This project was needed to evolve machine probing from merely a setup aid to an on-the-machine inspection system. Use of probing for on-machine inspection would significantly decrease cycle time by elimination of the need for first-piece inspection (at a remote location). Federal Manufacturing and Technologies (FM and T) had the manufacturing facility and the ability to integrate the system into production. The Contractor had a system that could optimize the machine tool to compensate for thermal growth and related error.
Date:
February 14, 2000
Creator:
Arnold, K. F.
Object Type:
Report
System:
The UNT Digital Library
LLL Geothermal Energy Development Program. Status Report, January 1974--January 1975. [Impulse Turbines, Total Flow Conversion Systems]
None
Date:
February 14, 1975
Creator:
Austin, A. L.
Object Type:
Report
System:
The UNT Digital Library
Discretionary Budget Authority by Subfunction: An Overview
President Obama's FY2013 budget submission was released on February 13, 2012. This report provides a graphical overview of historical trends in discretionary budget authority (BA) from FY1976 through FY2011, enacted levels for FY2012 spending, and the levels consistent with the President's proposals for FY2013 through FY2017. Spending caps and budget enforcement mechanisms established in the Budget Control Act (BCA) of 2011 will probably strongly affect the FY2013 budget cycle. This report may provide a starting point for discussions about spending trends and federal priorities, but it does not attempt to explain spending patterns in each policy area.
Date:
February 14, 2012
Creator:
Austin, D. Andrew
Object Type:
Report
System:
The UNT Digital Library
A Possible stopping pi- beam for cancer therapeutics
In this report an estimate of the pion dose from a stopping {pi}{sup -} beam is made. Dose rates of 15 krad {center_dot} gram/min are obtained. These are adequate for clinical use.
Date:
February 14, 1972
Creator:
Awschalom, M.
Object Type:
Report
System:
The UNT Digital Library
EMS IMPLEMENTATION COSTS AT A DOE NATIONAL LABORATORY
None
Date:
February 14, 2000
Creator:
BRIGGS,S.L.K.
Object Type:
Article
System:
The UNT Digital Library
Electron-impact ionization of atomic hydrogen
Since the invention of quantum mechanics, even the simplest example of collisional breakup in a system of charged particles, e{sup {minus}} + H {r_arrow} H{sup +} + e{sup {minus}} + e{sup {minus}}, has stood as one of the last unsolved fundamental problems in atomic physics. A complete solution requires calculating the energies and directions for a final state in which three charged particles are moving apart. Advances in the formal description of three-body breakup have yet to lead to a viable computational method. Traditional approaches, based on two-body formalisms, have been unable to produce differential cross sections for the three-body final state. Now, by using a mathematical transformation of the Schrodinger equation that makes the final state tractable, a complete solution has finally been achieved, Under this transformation, the scattering wave function can be calculated without imposing explicit scattering boundary conditions. This approach has produced the first triple differential cross sections that agree on an absolute scale with experiment as well as the first ab initio calculations of the single differential cross section.
Date:
February 14, 2000
Creator:
Baertschy, Mark D.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Composite Octet Searches with Jet Substructure
Many new physics models with strongly interacting sectors predict a mass hierarchy between the lightest vector meson and the lightest pseudoscalar mesons. We examine the power of jet substructure tools to extend the 7 TeV LHC sensitivity to these new states for the case of QCD octet mesons, considering both two gluon and two b-jet decay modes for the pseudoscalar mesons. We develop both a simple dijet search using only the jet mass and a more sophisticated jet substructure analysis, both of which can discover the composite octets in a dijet-like signature. The reach depends on the mass hierarchy between the vector and pseudoscalar mesons. We find that for the pseudoscalar-to-vector meson mass ratio below approximately 0.2 the simple jet mass analysis provides the best discovery limit; for a ratio between 0.2 and the QCD-like value of 0.3, the sophisticated jet substructure analysis has the best discovery potential; for a ratio above approximately 0.3, the standard four-jet analysis is more suitable.
Date:
February 14, 2012
Creator:
Bai, Yang & Shelton, Jessie
Object Type:
Article
System:
The UNT Digital Library
Field Demonstration of a Membrane Process to Recover Heavy Hydrocarbons and to Remove Water From Natural Gas Annual Report: 2002
The objective of this project is to design, construct and field demonstrate a membrane system to recover natural gas liquids (NGL) and remove water from raw natural gas. An extended field test to demonstrate system performance under real-world conditions would convince industry users of the efficiency and reliability of the process. The system has been designed and fabricated by Membrane Technology and Research, Inc. (MTR) and will be installed and operated at British Petroleum (BP)-Amoco's Pascagoula, MS plant. The Gas Research Institute will partially support the field demonstration and BP-Amoco will help install the unit and provide onsite operators and utilities. The gas processed by the membrane system will meet pipeline specifications for dewpoint and Btu value and can be delivered without further treatment to the pipeline. Based on data from prior membrane module tests, the process is likely to be significantly less expensive than glycol dehydration followed by propane refrigeration, the principal competitive technology. At the end of this demonstration project the process will be ready for commercialization. The route to commercialization will be developed during this project and may involve collaboration with other companies already servicing the natural gas processing industry.
Date:
February 14, 2003
Creator:
Baker, R.; Hofmann, R. & Lokhandwala, K. A.
Object Type:
Report
System:
The UNT Digital Library
The Strategic Petroleum Reserve: History, Perspectives, and Issues
None
Date:
February 14, 2008
Creator:
Bamberger, Robert
Object Type:
Report
System:
The UNT Digital Library
Strategic Petroleum Reserve
None
Date:
February 14, 2003
Creator:
Bamberger, Robert L.
Object Type:
Report
System:
The UNT Digital Library