Collection
Office of Scientific & Technical Information Technical Reports
229
Texas Laws and Resolutions Archive
220
Congressional Research Service Reports
95
Texas Patents
47
Texas Attorney General Opinions
37
Technical Report Archive and Image Library
32
Government Accountability Office Reports
29
National Advisory Committee for Aeronautics Collection
16
Texas State Publications
11
Texas Register
10
6 More
Country
States
713 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
713
next
Measurement of the Inclusive $W^\pm$ and Z/Gamma Cross Sections in the Electron and Muon Decay Channels in $Pp$ Collisions at $\sqrt{s}=7$ TeV with the ATLAS Detector
None
Date:
May 29, 2013
Creator:
Aad, Georges
Object Type:
Article
System:
The UNT Digital Library
Search for Massive Long-lived Highly Ionising Particles with the ATLAS Detector at the LHC
None
Date:
May 29, 2013
Creator:
Aad, Georges
Object Type:
Article
System:
The UNT Digital Library
Search for New Phenomena in ttbar Events with Large Missing Transverse Momentum in Proton-Proton Collisions at sqrt(s)=7$ TeV With the ATLAS Detector
None
Date:
May 29, 2013
Creator:
Aad, Georges
Object Type:
Article
System:
The UNT Digital Library
Silo.
Patent for a reinforced concrete silo, including specifications and illustrations.
Date:
May 29, 1917
Creator:
Abbett, Edgar J.
Object Type:
Patent
System:
The Portal to Texas History
Taming transport in InN
The large electron affinity of InN, close to 6 eV and the largest of any III-V semiconductor, creates a strong driving force for native donor formation, both in the bulk and at surfaces and interfaces. Moreover, all InN surfaces, regardless of crystal orientation or doping, have been observed to have a surface accumulation layer of electrons, which interferes with standard electrical measurements. For these reasons, until recently, it was uncertain whether or not compensation by donor defects would prevent “real” p-type activity (i.e. existence of sufficiently shallow acceptors and mobile holes). A coordinated experimental approach using a combination of electrical (Hall effect) and electrothermal (Seebeck coefficient) measurements will be described that allows definitive evaluation of carrier transport in InN. In Mg-doped InN films, the sensitivity of thermopower to bulk hole conduction, combined with modeling of the parallel conducting layers (surface/bulk/interface), enables quantitative measurement of the free hole concentration and mobility. In undoped (n-type) material, combined Hall and thermopower measurements, along with a considering of the scattering mechanisms, leads to a quantitative understanding of the crucial role of charged line defects in limiting electron transport.
Date:
May 29, 2011
Creator:
Ager, Joel W., III & Miller, Nate R.
Object Type:
Article
System:
The UNT Digital Library
Linear and Nonlinear Wave Propagation in Negative Refraction Meta-materials
We discuss linear and nonlinear optical wave propagation in a left-handed medium (LHM) or medium of negative refraction (NRM). We use the approach of characterizing the medium response totally by a generalized electric polarization (with a dielectric permittivity {tilde {var_epsilon}}(w, {rvec k})) that can be decomposed into a curl and a non-curl part. The description has a one-to-one correspondence with the usual approach characterizing the LHM response with a dielectric permittivity {var_epsilon}<0 and a magnetic permeability {mu}<0. The latter approach is less physically transparent in the optical frequency region because the usual definition of magnetization loses its physical meaning. Linear wave propagation in LHM or NRM is characterized by negative refraction and negative group velocity that could be clearly manifested by ultra-short pulse propagation in such a medium. Nonlinear optical effects in LHM can be predicted from the same calculations adopted for ordinary media using our general approach.
Date:
May 29, 2003
Creator:
Agranovich, V.M.; Shen, Y.R.; Baughman, R.H. & Zakhidov, A.A.
Object Type:
Article
System:
The UNT Digital Library
Experimental investigation of the effects of plan-form taper on the aerodynamic characteristics of symmetrical unswept wings of varying aspect ratio
Report presenting an investigation to determine the effects of plan-form taper on the aerodynamic characteristics of a series of symmetrical, unswept wings with thicknesses of 8-percent chord. The wings were tested with four different bodies of revolution over a range of Mach numbers. Results regarding the lift, drag, pitching-moment, lift-curve slope, lift-drag ratio, and pitching-moment curve are provided.
Date:
May 29, 1953
Creator:
Allen, Edwin C.
Object Type:
Report
System:
The UNT Digital Library
Pseudomoment fluid modeling: ion-acoustic landau damping and non-equilibrium temperature
This paper introduces a hierarchy of electron pseudomoment fluid equations that is used to derive electron Landau damping of ion acoustic waves.
Date:
May 29, 1997
Creator:
Amendt, P.
Object Type:
Article
System:
The UNT Digital Library
Vehicle-Axle
Patent for vehicle-axle "with removable spindles which when they become worn may be easily and quickly removed and replaced by new ones." (lines 13-15); including illustration and instructions
Date:
May 29, 1900
Creator:
Andrews, William H.
Object Type:
Patent
System:
The Portal to Texas History
Li⁶ and Li⁷ (n. 2n) Cross Sections at 14.1 Mev
Abstract: "An absolute measurement of the 14.1-Mev (n, 2n) cross sections of Li-6 and Li-7 has been made using the large scintillator technique, resulting in cross sections in barns of 0.070 +/- 0.006 and 0.056 +/- 0.005 for Li-6 and Li-7, respectively."
Date:
May 29, 1958
Creator:
Ashby, V. J.; Catron, H. C.; Newkirk, Lester L.; Taylor, C. J. & Williamson, M. A.
Object Type:
Report
System:
The UNT Digital Library
Car-Coupling
Patent for a car-coupling that "will greatly simplify the construction and facilitate the operation thereof by providing levers upon the end of the car" (lines 14-17); including illustration and instructions
Date:
May 29, 1900
Creator:
Asher, A. J. & Gautt, W. A.
Object Type:
Patent
System:
The Portal to Texas History
Probabilistic Assessment of Weld Quality in Steel Piping Under Seismic Conditions
Seismic stress analyses of plant piping systems usually ignore the possibility of reduced joint strength due to weld imperfections. This paper presents a method that might be used to assess the impact of weld imperfections in a piping system, provided that limited destructive examination of welded joints is possible. A probability distribution function of weld quality is developed from the destructive examination, and this is combined with an experimentally determined relationship between weld quality and reduced strength. This latter is the result of uniaxial tensile testing of specimens with controlled imperfections. A seismic stress probability distribution function is determined by conventional seismic analysis. The above quantities are used to quantify the conditional failure probability of the imperfect weld. Effect of imperfection distribution within a given weld on the probability of failure is discussed.
Date:
May 29, 2001
Creator:
Awadalla, N.G.
Object Type:
Article
System:
The UNT Digital Library
INORGANIC PLUME DELINEATION USING SURFACE HIGH RESOLUTION ELECTRICAL RESISTIVITY AT THE BC CRIBS & TRENCHES SITE HANFORD
A surface resistivity survey was conducted on the Hanford Site over a waste disposal trench that received a large volume of liquid inorganic waste. The objective of the survey was to map the extent of the plume that resulted from the disposal activities approximately 50 years earlier. The survey included six resistivity transects of at least 200m, where each transect provided two-dimensional profile information of subsurface electrical properties. The results of the survey indicated that a low resistivity plume resides at a depth of approximately 25-44 m below ground surface. The target depth was calibrated with borehole data of pore-water electrical conductivity. Due to the high correlation of the pore-water electrical conductivity to nitrate concentration and the high correlation of measured apparent resistivity to pore-water electrical conductivity, inferences were made that proposed the spatial distribution of the apparent resistivity was due to the distribution of nitrate. Therefore, apparent resistivities were related to nitrate, which was subsequently rendered in three dimensions to show that the nitrate likely did not reach the water table and the bounds of the highest concentrations are directly beneath the collection of waste sites.
Date:
May 29, 2007
Creator:
BENECKE, M.W.
Object Type:
Article
System:
The UNT Digital Library
Misleading Performance Claims in Parallel Computations
In a previous humorous note entitled 'Twelve Ways to Fool the Masses,' I outlined twelve common ways in which performance figures for technical computer systems can be distorted. In this paper and accompanying conference talk, I give a reprise of these twelve 'methods' and give some actual examples that have appeared in peer-reviewed literature in years past. I then propose guidelines for reporting performance, the adoption of which would raise the level of professionalism and reduce the level of confusion, not only in the world of device simulation but also in the larger arena of technical computing.
Date:
May 29, 2009
Creator:
Bailey, David H.
Object Type:
Article
System:
The UNT Digital Library
GLAMM: Genome-Linked Application for Metabolic Maps
The Genome-Linked Application for Metabolic Maps (GLAMM) is a unified web interface for visualizing metabolic networks, reconstructing metabolic networks from annotated genome data, visualizing experimental data in the context of metabolic networks, and investigating the construction of novel, transgenic pathways. This simple, user-friendly interface is tightly integrated with the comparative genomics tools of MicrobesOnline. GLAMM is available for free to the scientific community at glamm.lbl.gov.
Date:
May 29, 2011
Creator:
Bates, John; Chivian, Dylan & Arkin, Adam
Object Type:
Article
System:
The UNT Digital Library
'Fission' of Medium Weight Elements
The fission reaction has been observed with high energy accelerator projectiles for elements as light as tantalum but has not been reported for medium weight elements. The present note presents evidence for the occurrence of reactions which are probably most properly described by the term 'fission' and which seem to occur with very small yield throughout the region where this type of reaction is only slightly exoergic or even endoergic with respect to mass balance. In the course of detailed investigation of the spallation of copper and the variation of the product yields with energy of the bombarding particle the threshold for formation of radioactive Cl{sup 38} (38-minute half-life) from elemental studied. The energetically most economical way in which Cl{sup 38} might be spallation reactions is by emission from the bombarded copper nucleus of nucleons in groups such as alpha-particles instead of single nucleons 0 The energetic requirements for the reaction Cu{sup 63}(p,pn6a)Cl{sup 38}, in which the maximum number of alpha-particles are emitted, include (1) the mass difference between the reactants and the products and (2) the excitation energy which the alpha-particles must have in order to pass over the coulombic barrier, Since the reaction is endoergic with respect to …
Date:
May 29, 1950
Creator:
Batzel, Roger T. & Seaborg, G. T.
Object Type:
Report
System:
The UNT Digital Library
Determination of Free Acid by Standard Addition with Potassium Thiocyanate as Complexant
A method is described for determination of free acid in solutions containing the hydrolyzable ions Al (III), Cr(III), Fe(III), Hg(II), Ni(II), Th(IV), and U(VI). The concentration of the sample is calculated either by solving three simultaneous Nernst equations, by the Gran plot procedure, or by means of a microprocessor pH meter. Molar concentrations of metal ion up to 2.5 times that of the acid can be tolerated. The method has been applied to analysis of nuclear processing solutions that contain Pu(III), in addition to the ions listed above.
Date:
May 29, 2001
Creator:
Baumann, E. W.
Object Type:
Article
System:
The UNT Digital Library
A Tritiated-Water Detector with U-232/Th-228 Source
The detection capabilities of the new U-232/Th-228 source are comparable to those of the Na-24 source. The main benefit in using the new source is the ease of operation. Elimination of the neutron activation step required for Na-24 sources saves about 24 hours in planning, scheduling, and executing. With the new U-232/Th-228 source, the monitor can be put in operation in less than 15 minutes. The long half-life of the U-232/Th-228 source also eliminates the need to record calibration and measurement times, as required for decay corrections when using a Na-24 source.
Date:
May 29, 2001
Creator:
Baumann, N.P.
Object Type:
Article
System:
The UNT Digital Library
Heat Pump Water Heater Durabliltiy Testing - Phase II
Ten heat pump water heaters (HPWH) were placed in an environmentally controlled test facility and run through a durability test program of approximately 7300 duty cycles (actual cycles accumulated ranged from 6640 to 8324 for the ten units). Five of the units were upgraded integral types (HPWH mounted on storage tank, no pump) from the same manufacturer as those tested in our first durability program in 2001 (Baxter and Linkous, 2002). The other five were ''add-on'' type units (HPWH with circulation pump plumbed to a separate storage tank) from another manufacturer. This durability test was designed to represent approximately 7-10 years of normal operation to meet the hot water needs of a residence. The integral units operated without incident apart from two control board failures. Both of these were caused by inadvertent exposure to very hot and humid (>135 F dry bulb and >120 F dew point) conditions that occurred due to a test loop failure. It is not likely that any residential water heater would be installed where such conditions were expected so these failures are not considered a long-term reliability concern. Two of the integral HPWHs featured a condensate management system (CMS) option that effectively eliminated any need …
Date:
May 29, 2004
Creator:
Baxter, VAND.
Object Type:
Report
System:
The UNT Digital Library
Farm and Food Support Under USDA's Section 32 Program
This report describes provisions in the 2008 farm bill (P.L. 110-234) related to Section 32 appropriations and how non-transferred money (funding not put toward child nutrition programs) may be spent. It includes an overfiew of how Section 32 funds have generally been used and the implications of the new restrictions.
Date:
May 29, 2008
Creator:
Becker, Geoffrey S.
Object Type:
Report
System:
The UNT Digital Library
Physical security: today
None
Date:
May 29, 1973
Creator:
Becker, R.C.
Object Type:
Article
System:
The UNT Digital Library
The International Space Station and the Space Shuttle
This report discusses the International Space Station (ISS) program, which began in 1993, with Russia joining the United States, Europe, Japan, and Canada.
Date:
May 29, 2008
Creator:
Behrens, Carl E.
Object Type:
Report
System:
The UNT Digital Library
Gasoline Prices: Issues for the 110th Congress
This report reviews the major legislative initiatives to deal with the gasoline price issue.
Date:
May 29, 2007
Creator:
Behrens, Carl E. & Glover, Carol
Object Type:
Report
System:
The UNT Digital Library
Tank characterization report for double-shell tank 241-AW-102
This document summarizes the information on the historical uses, present status, and the sampling and analysis results of waste stored in Tank 241-AW-102. This report supports the requirements of the Tri-Party Agreement Milestone M-44-05.
Date:
May 29, 1997
Creator:
Bell, K. E.
Object Type:
Report
System:
The UNT Digital Library