Partner
UNT Libraries Government Documents Department
269
UNT Libraries Special Collections
53
Oklahoma Historical Society
50
Sterling Municipal Library
12
UNT Libraries
7
Alvin Community College
6
Carl Albert Congressional Research and Studies Center
5
Livingston Municipal Library
4
Archer Public Library
3
Ellis Memorial Library
3
47 More
Collection
Office of Scientific & Technical Information Technical Reports
178
Texas Digital Newspaper Program
107
Congressional Research Service Reports
62
Oklahoma Digital Newspaper Program
56
Tocker Foundation Grant
54
KXAS-NBC 5 News Collection
28
Government Accountability Office Reports
19
LGBT Collections
16
The Baytown Sun
12
Altus Times-Democrat
11
87 More
Degree Department
Country
Year
Month
Day
Language
490 Matching Results
Results open in a new window/tab.
Search for New Physics at a Super-B Factory
The importance of a Super-B Factory in the search for New Physics, in particular, due to CP-od phase(s) from physics beyond the Standard Model is surveyed. The first point to emphasize is that we know now how to directly measure all three angles of the unitarity triangle very cleanly, i. e. without theoretical assumptions with irreducible theory error {le} 1%; however this requires much more luminosity than is currently available at B-factories. Direct searches via penguin-dominated hadronic modes as well as radiative, pair-leptonic and semi-leptonic decays are also discussed. Null tests of the SM are stressed as these will play a crucial role especially if the effects of BSM phase(s) on B-physics are small.
Date:
January 5, 2004
Creator:
Browder, T. E. & Soni, A.
Object Type:
Article
System:
The UNT Digital Library
ICF Program: LDRD-ER Final Report
In the 01-ERD-107 LDRD-ER project, we have performed novel Thomson scattering experiments at the Trident and Omega laser facilities and provided high quality spectral data. These results have led to the development of the first quantitative understanding of laser-plasma interactions for NIF plasmas. For this purpose an green/ultraviolet probe laser, built for Nova in 1998 [1] and successfully used to measure both temperature and plasma wave amplitudes [2], has been deployed on Omega. The Thomson scattering diagnostics has been used twofold: (1) it provided independent measurements of the plasma electron and ion temperature, the plasma flow velocity, or the electron distribution function; (2) it provided measurements of the primary plasma wave and their secondary non-linear decay wave products. These experiments at Omega provide definitive quantitative results on the nonlinear saturation of stimulated Raman scattering for green (2{omega}) beams. In addition, the experiments on the Trident laser have led to a quantitative understanding of the stimulated Brillouin scattering in low-Z plasmas. A nonlinear frequency detuning model has successfully explained all the experimental observable including the SBS reflectivity. This model has been implemented into the laser-plasma interaction code pF3D as a tool to design and optimize NIF target experiments with SBS and …
Date:
February 5, 2004
Creator:
Glenzer, S H
Object Type:
Report
System:
The UNT Digital Library
STOCHASTIC COOLING POWER REQUIREMENTS.
A practical obstacle for stochastic cooling in high-energy colliders like RHIC is the large amount of power needed for the cooling system. Based on the coasting-beam Fokker-Planck (F-P) equation, we analytically derived the optimum cooling rate and cooling power for a beam of uniform distribution and a cooling system of linear gain function. The results indicate that the usual back-of-envelope formula over-estimated the cooling power by a factor of the mixing factor M. On the other hand, the scaling laws derived from the coasting-beam Fokker-Planck approach agree with those derived from the bunched-beam Fokker-Planck approach if the peak beam intensity is used as the effective coasting-beam intensity. A longitudinal stochastic cooling system of 4-8 GHz bandwidth in RHIC can effectively counteract intrabeam scattering, preventing the beam from escaping the RF bucket becoming debunched around the ring.
Date:
July 5, 2004
Creator:
Wei, J.; Blaskiewicz, M. & Brennan, M.
Object Type:
Article
System:
The UNT Digital Library
3D Computations and Experiments
This project consists of two activities. Task A, Simulations and Measurements, combines all the material model development and associated numerical work with the materials-oriented experimental activities. The goal of this effort is to provide an improved understanding of dynamic material properties and to provide accurate numerical representations of those properties for use in analysis codes. Task B, ALE3D Development, involves general development activities in the ALE3D code with the focus of improving simulation capabilities for problems of mutual interest to DoD and DOE. Emphasis is on problems involving multi-phase flow, blast loading of structures and system safety/vulnerability studies.
Date:
April 5, 2004
Creator:
Couch, R; Faux, D; Goto, D & Nikkel, D
Object Type:
Report
System:
The UNT Digital Library
The Retirement Savings Tax Credit: A Fact Sheet
None
Date:
April 5, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
March 11 Terrorist Attacks in Madrid and Spain’s Elections: Implications for U.S. Policy
None
Date:
October 5, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
ACCELERATION OF POLARIZED BEAMS USING MULTIPLE STRONG PARTIAL SIBERIAN SNAKES.
Acceleration of polarized protons in the energy range of 5 to 25 GeV is particularly difficult since depolarizing spin resonances are strong enough to cause significant depolarization but full Siberian snakes cause intolerably large orbit excursions. Using a 20-30% partial Siberian snake both imperfection and intrinsic resonances can be overcome. Such a strong partial Siberian snake was designed for the Brookhaven AGS using a dual pitch helical superconducting dipole. Multiple strong partial snakes are also discussed for spin matching at beam injection and extraction.
Date:
July 5, 2004
Creator:
ROSER,T. AHRENS,L. BAI,M. ET AL.
Object Type:
Article
System:
The UNT Digital Library
Dangerous Waste Characteristics of Contact-Handled Transuranic Mixed Wastes from Hanford Tanks
This report summarizes existing analytical data gleaned from samples taken from the Hanford tanks designated as potentially containing transuranic mixed process wastes. Process knowledge of the wastes transferred to these tanks has been reviewed to determine whether the dangerous waste characteristics now assigned to all Hanford underground storage tanks are applicable to these particular wastes. Supplemental technologies are being examined to accelerate the Hanford tank waste cleanup mission and accomplish waste treatment safely and efficiently. To date, 11 Hanford waste tanks have been designated as potentially containing contact-handled (CH) transuranic mixed (TRUM) wastes. The CH-TRUM wastes are found in single-shell tanks B-201 through B-204, T-201 through T-204, T-104, T-110, and T-111. Methods and equipment to solidify and package the CH-TRUM wastes are part of the supplemental technologies being evaluated. The resulting packages and wastes must be acceptable for disposal at the Waste Isolation Pilot Plant (WIPP). The dangerous waste characteristics being considered include ignitability, corrosivity, reactivity, and toxicity arising from the presence of 2,4,5-trichlorophenol at levels above the dangerous waste threshold. The analytical data reviewed include concentrations of sulfur, sulfate, cyanide, 2,4,5-trichlorophenol, total organic carbon, and oxalate; the composition of the tank headspace, pH, and mercury. Differential scanning calorimetry results …
Date:
October 5, 2004
Creator:
Tingey, Joel M.; Bryan, Garry H. & Deschane, Jaquetta R.
Object Type:
Report
System:
The UNT Digital Library
Identity Theft and the Fair Credit Reporting Act: An Analysis of TRW v. Andrews and Current Legislation
This report provides a brief summary of the Fair Credit Reporting Act provisions in question, as well as an analysis of the recent Supreme Court decision and an overview of recently enacted legislation.
Date:
January 5, 2004
Creator:
Welborn, Angie A.
Object Type:
Report
System:
The UNT Digital Library
01-ERD-111 - The Development of Synthetic High Affinity Ligands
The aim of this project was to develop Synthetic High-Affinity Ligands (SHALs), which bind with high affinity and specificity to proteins of interest for national security and cancer therapy applications. The aim of producing synthetic ligands for sensory devices as an alternative to antibody-based detection assays and therapeutic agents is to overcome the drawbacks associated with antibody-based in next-generation sensors and systems. The focus area of the project was the chemical synthesis of the SHALs. The project concentrated on two different protein targets. (a) The C fragment of tetanus and botulinum toxin, potential biowarfare agents. A SHAL for tetanus or botulinum toxin would be incorporated into a sensory device for the toxins. (b) HLA-DR10, a protein found in high abundance on the surface of Non-Hodgkins Lymphoma. A SHAL specific to a tumor marker, labeled with a radionuclide, would enable the targeted delivery of radiation therapy to metastatic disease. The technical approach used to develop a SHAL for each protein target will be described in more detail below. However, in general, the development of a SHAL requires a combination of computational modeling techniques, modern nuclear magnetic resonance spectroscopy (NMR) and synthetic chemistry.
Date:
February 5, 2004
Creator:
Perkins, J; Balhorn, R; Cosman, M; Lightstone, F & Zeller, L
Object Type:
Report
System:
The UNT Digital Library
Defense Cleanup and Environmental Programs: Authorization and Appropriations for FY2004
This report provides background information on defense-related environmental programs, analyzes key implementations issues, and examines final versions of legislation to authorize and appropriate funding for these activities for FY2004.
Date:
January 5, 2004
Creator:
Bearden, David M.
Object Type:
Report
System:
The UNT Digital Library
Omnibus Appropriations Acts: Overview of Recent Practices
None
Date:
October 5, 2004
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Coefficient of Thermal Expansion of the Beta and Delta Polymorphs of HMX
Dimensional changes related to temperature cycling of the beta and delta polymorphs of HMX (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) are important for a variety of applications. The coefficient of thermal expansion (CTE) of the beta and delta phases are measured and reported in this work over a temperature range of -20 C to 215 C. In addition, dimensional changes associated with the phase transition were measured, both through the transition and back down. Initially, differential scanning calorimetry (DSC) was used to investigate back conversion of the delta phase to the beta phase polymorph. The most successful approach was first to measure the amount of the beta to delta conversion, then after a given cooling period a repeat analysis, to measure the heat consumed by a second pass through the beta to delta phase transition. In addition, TMA is used to measure the dimensional change of a 0.20-gram sample of HMX during its initial heating and then three days later during a 2nd heating. This HMX shows the beta to delta phase transition a second time, thereby confirming the back conversion from delta to beta phase HMX.
Date:
August 5, 2004
Creator:
Weese, R K; Burnham, A K & Maienschein, J L
Object Type:
Article
System:
The UNT Digital Library
Poroelastic Fluid Effects on Shear for Rocks with Soft Anisotropy
None
Date:
January 5, 2004
Creator:
Berger, E. L.
Object Type:
Article
System:
The UNT Digital Library
Applying Loop Optimizations to Object-oriented Abstractions Through General Classification of Array Semantics
Optimizing compilers have a long history of applying loop transformations to C and Fortran scientific applications. However, such optimizations are rare in compilers for object-oriented languages such as C++ or Java, where loops operating on user-defined types are left unoptimized due to their unknown semantics. Our goal is to reduce the performance penalty of using high-level object-oriented abstractions. We propose an approach that allows the explicit communication between programmers and compilers. We have extended the traditional Fortran loop optimizations with an open interface. Through this interface, we have developed techniques to automatically recognize and optimize user-defined array abstractions. In addition, we have developed an adapted constant-propagation algorithm to automatically propagate properties of abstractions. We have implemented these techniques in a C++ source-to-source translator and have applied them to optimize several kernels written using an array-class library. Our experimental results show that using our approach, applications using high-level abstractions can achieve comparable, and in cases superior, performance to that achieved by efficient low-level hand-written codes.
Date:
March 5, 2004
Creator:
Yi, Q & Quinlan, D
Object Type:
Article
System:
The UNT Digital Library
A METHOD TO MEASURE THE FOCUSING PROPERTIES (R-MATRIX) OF A MAGNET.
In this paper we discuss, and study the feasibility of a method that may be used to measure the focusing properties of a magnet. This method may prove valuable when applied to ''non-conventional'' magnets that deviate from the usual dipole magnets or other multipole magnets (quadrupoles/sextupoles etc.) which are commonly used in a synchrotron or a beam line. In this category of ''non-conventional'' magnets, fall special magnets, which come under the name ''Snakes'', which are being used in synchrotron accelerators to introduce artificial spin resonances to help overcome the intrinsic and/or imperfection spin resonances which appear during the acceleration of polarized beams. This method of measuring the focusing properties of a magnet requires the use of ''low energy'' and ''high rigidity'' heavy-ions which may be obtained from the BNL Tandem accelerator. In brief the method consists on, injecting ''narrow-beamlets'' of heavy ions into a magnet and measuring the coordinates, of these ''narrow-beamlets'', at the entrance and exit of the magnet. From the measurement of the coordinates of the ''narrow-beamlets'' we can deduce information on the R matrix (first order transfer matrix elements) and higher order matrix elements that define the focusing properties of the magnet.
Date:
July 5, 2004
Creator:
TSOUPAS,N. THIEBERGER,P. BROWN,K. GASSNER,D. GLENN,W. AHRENS,L. ROSER,T. LEE,Y. Y. WEI,J.
Object Type:
Article
System:
The UNT Digital Library
DENSITY-FUNCTIONAL CALCULATIONS FOR Ce, Th, AND Pu METALS AND ALLOYS
The phase diagrams of Ce, Th, and Pu metals have been studied by means of density-functional theory (DFT). In addition to these metals, the phase stability of Ce-Th and Pu-Am alloys has been also investigated from first-principles calculations. Equation-of-state (EOS) for Ce, Th, and the Ce-Th alloys has been calculated up to 1 Mbar pressure in good comparison to experimental data. Present calculations shows that the Ce-Th alloys adopt a body-centeredtetragonal (bct) structure upon hydrostatic compression that is in excellent agreement with measurements. The ambient pressure phase diagram of Pu is shown to be very poorly described by traditional DFT but rather well modeled when including magnetic interactions. In particular, the anomalous {var_sigma} phase of Pu is shown to be stabilized by magnetic disorder at elevated temperatures. The Pu-Am system has also been studied in a similar fashion and it is shown that this system, for about 25% Am content, becomes antiferromagnetic below about 400 K that corroborate the recent discovery of a Curie-Weiss behavior in this system.
Date:
April 5, 2004
Creator:
Landa, A & Soderlind, P
Object Type:
Article
System:
The UNT Digital Library
Possible Laminographic and Tomosynthesis Applications for Wolter Microscope Scan Geometries
The Wolter microscope includes a number of attractive features for x-ray imaging, and possible connections to laminographic and tomosynthesis 3D object recovery algorithms. This type of instrument employs x-ray optics to sift out single energy x-rays from a broader spectral energy source, and direct those x-rays to a ''focus plane'' similar to the operation of a optical microscope (see Figure 1 for schematic of a Wolter instrument). Unlike optical microscopes the 3D object can be thick in the direction of the x-rays and in this case more of the intensity of the image is affected by the out-of-focus planes, since the ray-paths span the entire depth of the object. It is clear that the ''in-focus'' plane of a Wolter contain more 3D information than a simple ''point-projection'' radiograph. However, it is not clear just how the impact of the out-of-focus planes obscures or distorts features of interest for the in-focus planes. Further, it is not clear just how object positioning can be combined with multiple acquisitions to enable recovery of other planes within the object function or the entire object function. Of particular interest here are Wolter microscopes configured for mesoscale objects (mm extent with um features). Laminographic and tomosynthesis …
Date:
October 5, 2004
Creator:
Schneberk, D; Jackson, J & Martz, H
Object Type:
Report
System:
The UNT Digital Library
[Email from Nancy Russell to board of Texas Stonewall Democrats]
Email from Nancy Russell to board of Texas Stonewall Democrats on April 5, 2004, discussing April 17 meeting in Austin.
Date:
April 5, 2004
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Schedule for events at the convention]
Schedule listing the dates and times of events planned for the Texas State Democratic Convention.
Date:
June 5, 2004
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Letter from Philip A. Berkebile to TDNA Board Members, October 5, 2004]
Letter from Philip A. Berkebile to TDNA Board Members on October 5, 2004 with the subject Results of Treasurer Election. The new treasurer for TDNA as elected is Bob Carlquist, executive vice president and general manager of the Houston Chronicle.
Date:
October 5, 2004
Creator:
Berkebile, Philip A.
Object Type:
Letter
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 128, No. 35, Ed. 1 Thursday, February 5, 2004
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
February 5, 2004
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 129, No. 10, Ed. 1 Thursday, August 5, 2004
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
August 5, 2004
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
Congressional Salaries and Allowances
This report provides basic information on congressional salaries and allowances. First, the report briefly summarizes the current salary of Members of Congress, limits on their outside earned income and honoraria, and applicable health insurance and retirement benefits. Second, it provides information on allowances available to Representatives and Senators to support them in their official and representational duties as Members. Third, it provides the salaries and allowances available to the Speaker of the House and the Vice President, as President of the Senate, and lists the salaries of congressional officers and officials and committee staff.
Date:
August 5, 2004
Creator:
Dwyer, Paul E.
Object Type:
Report
System:
The UNT Digital Library