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Office of Scientific & Technical Information Technical Reports
227
Defense Base Closure and Realignment Commission
104
Congressional Research Service Reports
75
Texas Patents
69
Texas Attorney General Opinions
25
Technical Report Archive and Image Library
16
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11
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10
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545 Matching Results
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Resistive-Wall Instability in the Damping Rings of the ILC
In the damping rings of the International Linear Collider (ILC), the resistive-wall instability is one of the dominant transverse instabilities. This instability directly influences the choice of material and aperture of the vacuum pipe, and the parameters of the transverse feedback system. This paper investigates the resistive-wall instabilities in an ILC damping ring under various conditions of beam pipe material, aperture, and fill pattern.
Date:
July 5, 2006
Creator:
Wang, L.; Bane, K .L. F.; Raubenheimer, T. & Ross, M.
Object Type:
Article
System:
The UNT Digital Library
A 30 ps Timing Resolution for Single Photons with Multi-pixel Burle MCP-PMT
We have achieved {approx}30 psec single-photoelectron and {approx}12ps for multi-photoelectron timing resolution with a new 64 pixel Burle MCP-PMT with 10 micron microchannel holes. We have also demonstrated that this detector works in a magnetic field of 15kG, and achieved a single-photoelectron timing resolution of better than 60 psec. The study is relevant for a new focusing DIRC RICH detector for particle identification at future Colliders such as the super B-factory or ILC, and for future TOF techniques. This study shows that a highly pixilated MCP-PMT can deliver excellent timing resolution.
Date:
July 5, 2006
Creator:
Va'vra, J.; Benitez, J.; Coleman, J.; Leith, D. W. G. S.; Mazaheri, G.; Ratcliff, B. et al.
Object Type:
Article
System:
The UNT Digital Library
Development of an Optimum Tracer Set for Apportioning Emissions of Individual Power Plants Using Highly Time-Resolved Measurements and Advanced Receptor Modeling
In previous studies, 11 elements (Al, As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Se, and Zn) were determined in 30-minute aerosol samples collected with the University of Maryland Semicontinuous Elements in Aerosol Sampler (SEAS; Kidwell and Ondov, 2001, 2004; SEAS-II) in several locations in which air quality is influenced by emissions from coal- or oil-fired power plants. At this time resolution, plumes from stationary high temperature combustion sources are readily detected as large excursions in ambient concentrations of elements emitted by these sources (Pancras et al. ). Moreover, the time-series data contain intrinsic information on the lateral diffusion of the plume (e.g., {sigma}{sub y}), which Park et al. (2005 and 2006) have exploited in their Pseudo-Deterministic Receptor Model (PDRM), to calculate emission rates of SO{sub 2} and 11 elements (mentioned above) from four individual coal- and oil-fired power plants in the Tampa Bay area. In the current project, we proposed that the resolving power of source apportionment methods might be improved by expanding the set of maker species and that there exist some optimum set of marker species that could be used. The ultimate goal was to determine the utility of using additional elements to better identify and isolate …
Date:
July 5, 2007
Creator:
Ondov, John & Beachley, Gregory
Object Type:
Report
System:
The UNT Digital Library
Use of Optically Stimulated Luminescence Imaging Plates and Reader for Arms Control Applications
Optically Stimulated Luminescence (OSL) technology has been pioneered at the Pacific Northwest National Laboratory (PNNL) for applications in personnel radiation dosimetry and commercially has become highly successful in replacing older technologies such as Thermoluminescence Dosimeters (TLDs) and film. OSL phosphors are used to measure radiation exposure by illuminating them with light after ionizing radiation exposure and measuring the amount of light emitted by the OSL phosphor. By using a two-dimensional plate of OSL material and raster scanning a light beam across the OSL plate a radiation pattern or image can be measured. The Arms Control community requires an electrons-free medium to measure the attributes of extent and symmetry on Pu pits in storage containers. OSL technology, used in the two-dimensional imaging mode, provides a means to measure these attributes with exposure times on the order of an hour. A special OSL reader has been built by PNNL to measure OSL imaging plates with a size of 20 cm by 30 cm. The reader uses 10 light emitting diode clusters with 10 corresponding photomultiplier tubes to measure an OSL imaging plate in less than 5 minutes. The resolution of each of the 10 measurement assemblies is 1 square-centimeter. A collimator assembly …
Date:
July 5, 2001
Creator:
Miller, Steven D.; Tomeraasen, Paul L.; Burghard, Brion J. & Traub, Richard J.
Object Type:
Report
System:
The UNT Digital Library
Single molecule study of a processivity clamp sliding on DNA
Using solution based single molecule spectroscopy, we study the motion of the polIII {beta}-subunit DNA sliding clamp ('{beta}-clamp') on DNA. Present in all cellular (and some viral) forms of life, DNA sliding clamps attach to polymerases and allow rapid, processive replication of DNA. In the absence of other proteins, the DNA sliding clamps are thought to 'freely slide' along the DNA; however, the abundance of positively charged residues along the inner surface may create favorable electrostatic contact with the highly negatively charged DNA. We have performed single-molecule measurements on a fluorescently labeled {beta}-clamp loaded onto freely diffusing plasmids annealed with fluorescently labeled primers of up to 90 bases. We find that the diffusion constant for 1D diffusion of the {beta}-clamp on DNA satisfies D {le} 10{sup -14} cm{sup 2}/s, much slower than the frictionless limit of D = 10{sup -10} cm{sup 2}/s. We find that the {beta} clamp remains at the 3-foot end in the presence of E. coli single-stranded binding protein (SSB), which would allow for a sliding clamp to wait for binding of the DNA polymerase. Replacement of SSB with Human RP-A eliminates this interaction; free movement of sliding clamp and poor binding of clamp loader to the …
Date:
July 5, 2007
Creator:
Laurence, T A; Kwon, Y; Johnson, A; Hollars, C; O?Donnell, M; Camarero, J A et al.
Object Type:
Article
System:
The UNT Digital Library
A Proposal for High-resolution X-ray Imaging of Intermodal Cargo Containers for Fissionable Materials
The sensitivity for identification of high-Z objects in elemental form in the massive cargo of intermodal containers with continuous bremsstrahlung radiation depends critically on discriminating the weak signal from uncollided photons from the very intense flux of scattered radiations that penetrate the cargo. We propose that this might be accomplished by rejection of detected events with E {le} 2-3 MeV that contain the majority of multiply-scattered photons along with a correction for single-scattered photons at higher energies. Monte Carlo simulations of radiographs with a 9-MeV bremsstrahlung spectrum demonstrate that rejection of detected events with E {le} 3 MeV removes the majority of signals from scattered photons emerging through cargo with Z {le} 30 and areal densities of at least 145 g cm{sup -2}. With analytical estimates of the single-scattered intensity at higher energies, accurate estimates of linear attenuation coefficients for shielded and unshielded uranium spheres with masses as small as 0.08 kg are found. The estimated maximum dose is generally so low that reasonable order tomography of interesting portions of a container should be possible.
Date:
July 5, 2007
Creator:
Quiter, B J; Prussin, S G; Pohl, B; Hall, J; Trebes, J; Stone, G et al.
Object Type:
Article
System:
The UNT Digital Library
Convertible Mixing and Cleaning Machine
Patent for convertible mixing and cleaning machine. Illustrations included.
Date:
July 5, 1904
Creator:
Stacey, John W.
Object Type:
Patent
System:
The Portal to Texas History
Cotton Picker's Truck
Patent for a cotton picker's truck. This invention is to provide a device for supporting the sacks of cotton pickers. Illustrations included.
Date:
July 5, 1904
Creator:
Franek, Jakob
Object Type:
Patent
System:
The Portal to Texas History
Bed-Spring Tightener
Patent for improvements in bed-spring tighteners, for adjusting the tension of a bed spring supporting wire as may be required. Illustration is included.
Date:
July 5, 1910
Creator:
Tlustos, Joseph J.
Object Type:
Patent
System:
The Portal to Texas History
Combination Fish-Bucket.
Patent for a combination fish bucket, which has two compartments for holding bait, tackle, and food and a holder for a fishing rod, which may be carried on the body or by a handle.
Date:
July 5, 1910
Creator:
Fly, Nathaniel D.
Object Type:
Patent
System:
The Portal to Texas History
Combination-Tool
Patent for a tool used for wire fences. Illustrations included.
Date:
July 5, 1910
Creator:
Dikes, Johnnie C.
Object Type:
Patent
System:
The Portal to Texas History
Apparatus for Elevating and Cleaning Seed Cotton
Patent for an apparatus for elevating and cleaning seed cotton
Date:
March 5, 1900
Creator:
Reynolds, Richard J.
Object Type:
Patent
System:
The Portal to Texas History
Car - Coupling.
Patent for a new and useful car coupling, including instructions and illustrations.
Date:
July 5, 1898
Creator:
Oden, Joshua K.
Object Type:
Patent
System:
The Portal to Texas History
Water-related impacts of geothermal energy production in California's Imperial Valley
To successfully develop the geothermal resources of the Imperial Valley, adequate supplies of cooling water must be obtained. The primary sources of water include waste waters from agricultural lands, condensate from flashed-steam facilities, and irrigation water. The major advantages and disadvantages of these supplies are examined and then the consequences of adopting six sets of water policies to support three scenarios of geothermal energy production are assessed. The assessment includes analyses of potential constraints to development as a result of restrictive water policies. It also includes predictions of changes in the Salton Sea's elevation and salinity caused by the consumption of agricultural drain water for cooling.
Date:
July 5, 1979
Creator:
Layton, D. W.
Object Type:
Article
System:
The UNT Digital Library
Evaluation of methods for cleaning low carbon uranium metal and alloy samples
Several methods for cleaning uranium samples prior to carbon analysis, using a Leco Carbon Analyzer, were evaluated. Use of Oakite Aluminum NST Cleaner followed by water and acetone rinse was found to be the best overall technique.
Date:
July 5, 1979
Creator:
Kirchner, K. & Dixon, M.
Object Type:
Report
System:
The UNT Digital Library
Grain Refinement of the As-Cast Uranium-5 w/o Chromium Alloy by Ternary Additions
Abstract: "Refinement of grain size of the base uranium-chromium eutectic alloy (uranium-5 w/o chromium) by ternary additions is discussed. Thirteen additions to the base alloy were investigated, and three additions were found to exhibit worthwhile grain-refinement tendencies. The three alloys, uranium-5 w/o chromium-0.2 w.o molybdenum, uranium-5 w/o chromium-0.2 w/o germanium, and uranium-5 w/o chromium-0.2 w/o niobium, were heat treated to produce final grain-size structures of between 0.015 and 0.033 mm."
Date:
July 5, 1955
Creator:
Saller, Henry A.; Dickerson, Ronald F.; Murr, William E. & Bauer, Arthur A.
Object Type:
Report
System:
The UNT Digital Library
Section 232 Investigations: Overview and Issues for Congress
This report provides an overview of Section 232 of the Trade Expansion Act of 1962, which provides the President with the ability to impose restrictions on certain imports based on an affirmative determination by the U.S. Department of Commerce that the product under investigation "is being imported into the United States in such quantities or under such circumstances as to threaten to impair the national security." It also analyzes the Trump Administration's Section 232 investigations and actions, and considers potential policy and economic implications and issues for Congress.
Date:
July 5, 2018
Creator:
Fefer, Rachel F.; Jones, Vivian C.; Hammond, Keigh E.; Murrill, Brandon J.; Platzer, Michaela D. & Williams, Brock R.
Object Type:
Report
System:
The UNT Digital Library
The Congressional Review Act: Determining Which "Rules" Must Be Submitted to Congress
This report describes what types of agency actions can be overturned using the Congressional Review Act (CRA) by providing a close examination and discussion of the statutory definition of "rule." It also explains how Members can use the CRA to overturn agency rules that have not been submitted to Congress.
Date:
July 5, 2018
Creator:
Brannon, Valerie C. & Carey, Maeve P.
Object Type:
Report
System:
The UNT Digital Library
Source of high activity levels recently observed from shipping containers and transfer cans
Shipping cans containing product from plant runs completed in the latter half of April and in May showed, in general, definitely higher levels of radiation than had been observed previously. Likewise, containers for the transfer of the F-10-P solution from the 224 Bldg. to 231 Bldg. (during May) exhibited higher radiation levels than could be attributed to higher power levels and increased batch sizes. These higher radiation levels were indicative that some radioactive element (or elements) was present in an amount greater than previously as would be expected from the shorter cooler periods, or that decontamination of elements previously present was less complete. It was considered essential to identify the source of these radiations and the cause for their presence has been investigated. The radioactive contaminant present in the final product has been identified rather definitely as Np{sup 239} which has 2.3d half-life a 0.25 MeV gamma ray and a weak beta ray. The amount of Np has increases as a result of the brand toward shorter cooling periods and the law decontamination factor for Np in the Separation Process.
Date:
July 5, 1945
Creator:
Swartout, J.A.
Object Type:
Report
System:
The UNT Digital Library
Military Construction, Veterans Affairs, and Related Agencies: FY2013 Appropriations
This report discusses federal government funding for the Military Construction, Veterans Affairs, and Related Agencies appropriations bill, which provides funding for the planning, design, construction, alteration, and improvement of facilities used by active and reserve military components worldwide.
Date:
July 5, 2012
Creator:
Else, Daniel H.; Scott, Christine & Panangala, Sidath Viranga
Object Type:
Report
System:
The UNT Digital Library
House Offset Amendments to Appropriations Bills: Procedural Considerations
This report is an introduction to selected House rules and practices governing the consideration of offset amendments to appropriations measures considered in the Committee of the Whole House on the State of the Union (or Committee of the Whole).
Date:
July 5, 2011
Creator:
Streeter, Sandy
Object Type:
Report
System:
The UNT Digital Library
Federal Funding for Wildfire Control and Management
This report looks at four issues dominating wildfire funding debates: the high cost of fire management, funding for fuel reduction, the federal role in protecting nonfederal lands, and post-fire rehabilitation. The Forest Service (FS) and the Department of the Interior (DOI) are responsible for protecting most federal lands from wildfires, however, many in Congress are concerned that wildfire costs are spiraling upward without a reduction in damages.
Date:
July 5, 2011
Creator:
Gorte, Ross W.
Object Type:
Report
System:
The UNT Digital Library
The Definition of “Supervisor” Under the National Labor Relations Act
This report discusses the National Labor Relations Board (NLRB) and their attempts to define the term "supervisor" in the National Labor Relations Act (NLRA) so that such employees can join or form a labor union as regular employees.
Date:
July 5, 2012
Creator:
Mayer, Gerald & Shimabukuro, Jon O.
Object Type:
Report
System:
The UNT Digital Library
Bridge.
Patent for a bridge of "simple and strong construction in metal of very low cost and light weight, using only such materials as are easily available, being also of easy construction and well adapted to resist washouts" (lines 9-13).
Date:
July 5, 1892
Creator:
Kosure, Thomas H.
Object Type:
Patent
System:
The Portal to Texas History