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343 Matching Results
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Modeling of Diffusion of Plutonium in Other Metals and of Gaseous Species in Plutonium-Based Systems
Establish standards for temperature conditions under which plutonium, uranium, or neptunium from nuclear wastes permeates steel, with which it is in contact, by diffusion processes. The primary focus is on plutonium because of the greater difficulties created by the peculiarities of face-centered-cubic-stabilized (delta) plutonium (the form used in the technology generating the waste).
Date:
July 2, 2004
Creator:
Cooper, Bernard R.; Fernando, Gayanath W.; Beiden, S.; Setty, A. & Sevilla, E.H.
Object Type:
Report
System:
The UNT Digital Library
Cruise Ship Pollution: Background, Laws and Regulations, and Current Issues
This report describes the several types of waste streams that cruise ships may discharge and emit.
Date:
July 2, 2004
Creator:
Copeland, Claudia
Object Type:
Report
System:
The UNT Digital Library
Conservation Provisions of the 2008 Farm Bill
This report discusses the policy questions and issues shaping the conservation title of the 2008 Farm Bill. The report describes the program changes in the enacted 2008 Farm Bill, and working lands conservation programs.
Date:
July 2, 2008
Creator:
Cowan, Tadlock & Johnson, Renée
Object Type:
Report
System:
The UNT Digital Library
2006 Vibrational Spectroscopy Gordon Conference
This Report is Description of Vibrational Spectroscopy at Gordon Conference
Date:
July 2, 2006
Creator:
Crim, Forrest Fleming
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with Harlan Crouse, July 2, 2004
The National Museum of the Pacific War presents an interview with Harlan Crouse. Crouse joined the Army in October 1944 and trained at Camp Hood. He arrived in Manila in April, 1945 as a replacement in the 1st Cavalry Division to prepare further for the invasion of Japan. In early September, his unit departed for Japan. Crouse shares several anecdotes about his experiences during the occupation. He eventually began serving as troop clerk, and then moved up to battalion sergeant major. Crouse remained in Japan, returning to the US to be discharged in November, 1946.
Date:
July 2, 2004
Creator:
Crouse, Harlan
Object Type:
Text
System:
The Portal to Texas History
Increase of magnetic transition temperatures by reduction of local disorder for perovskite manganites.
We report the synthesis of Sr{sub 1-x}Ca{sub x}MnO{sub 3} and La{sub 0.5}Ba{sub 0.5}MnO{sub 3} perovskites over extended cation and oxygen composition ranges and describe the dependence of their phase stability on the tolerance factor t = t(x,T,{delta}) that is a function of composition, temperature, and oxygen content. We show that magnetic transition temperatures depend strongly on the tolerance factor and charge disorder while dependence on the structural disorder is less important. By reducing charge and structural disorder we have significantly increased the Curie and Neel temperatures for perovskite manganites.
Date:
July 2, 2002
Creator:
Dabrowski, B.; Chmaissem, O.; Mais, J.; Kolesnik, S.; Jorgensen, J. D. & Short, S.
Object Type:
Article
System:
The UNT Digital Library
FY2007 Supplemental Appropriations for Defense, Foreign Affairs, and Other Purposes
This report contains information on federal appropriations for the fiscal year 2007 in the area of defense, foreign affairs, and related subjects.
Date:
July 2, 2007
Creator:
Daggett, Stephen; Belasco, Amy; Towell, Pat; Epstein, Susan B.; Veillette, Connie; Tarnoff, Curt et al.
Object Type:
Report
System:
The UNT Digital Library
Scintillator Based Energetic Ion Loss Diagnostic for the National Spherical Torus Experiment
A scintillator based energetic ion loss detector has been built and installed on the National Spherical Torus Experiment (NSTX) to measure the loss of neutral beam ions. The detector is able to resolve the pitch angle and gyroradius of the lost energetic ions. It has a wide acceptance range in pitch angle and energy, and is able to resolve the full, one-half, and one-third energy components of the 80 keV D neutral beams up to the maximum toroidal magnetic field of NSTX. Multiple Faraday cups have been embedded behind the scintillator to allow easy absolute calibration of the diagnostic and to measure the energetic ion loss to several ranges of pitch angle with good time resolution. Several small, vacuum compatible lamps allow simple calibration of the scintillator position within the field of view of the diagnostic's video camera.
Date:
July 2, 2007
Creator:
Darrow, D. S.
Object Type:
Report
System:
The UNT Digital Library
Cygnus History
The Cygnus Dual Beam Radiographic Facility consists of two identical radiographic sources: Cygnus 1 and Cygnus 2. This Radiographic Facility is located in an underground tunnel test area at the Nevada Test Site. The sources were developed to produce high-resolution images for dynamic plutonium experiments. This work will recount and discuss salient maintenance and operational issues encountered during the history of Cygnus. A brief description of Cygnus systems and rational for design selections will set the stage for this historical narrative. It is intended to highlight the team-derived solutions for technical problems encountered during extended periods of maintenance and operation. While many of the issues are typical to pulsed power systems, some of the solutions are unique. It is hoped that other source teams will benefit from this presentation, as well as other necessary disciplines (e.g., source users, system architects, facility designers and managers, funding managers, and team leaders).
Date:
July 2, 2009
Creator:
David J. Henderson, Raymond E. Gignac, Douglas E. Good, Mark D. Hansen, Charles V. Mitton; Daniel S. Nelson, Eugene C. Ormond; Steve R. Cordova, Isidro Molina & John R. Smith, Evan A. Rose
Object Type:
Article
System:
The UNT Digital Library
Comparison of amplified spontaneous emission pulse cleaners for use in chirped pulse amplification front end lasers
We compare various schemes for removing amplified spontaneous emission from seed laser pulses. We focus on compact schemes that are compatible with fiber laser front end systems with pulse energies in the 10nJ-1{micro}J range and pulse widths in the 100fs-10ps range. Pre-pulse contrast ratios greater than 10{sup 9} have been measured.
Date:
July 2, 2007
Creator:
Dawson, J.; Siders, C.; Phan, H.; Kanz, V. & Barty, C.
Object Type:
Article
System:
The UNT Digital Library
NLO QCD Corrections to Hadronic Higgs Production with Heavy Quarks
The production of a Higgs boson in association with a pair of t{bar t} or b{bar b} quarks plays a very important role at both the Tevatron and the Large Hadron Collider. The theoretical prediction of the corresponding cross sections has been improved by including the complete next-to-leading order QCD corrections. After a brief description of the most relevant technical aspects of the calculation, we review the results obtained for both the Tevatron and the Large Hadron Collider.
Date:
July 2, 2003
Creator:
Dawson, S.; Jackson, C.; Orr, L.; Reina, L. & Wacheroth, D.
Object Type:
Article
System:
The UNT Digital Library
235U and TRU Holdup Measurements on the 321-M Sawbenches
The Analytical Development Section of Savannah River Technology Center (SRTC) was requested by the Facilities Disposition Projects (FDP) to determine the holdup of enriched uranium in the 321-M facility as part of an overall deactivation project of the facility. The 321-M facility was used to fabricate enriched uranium fuel assemblies, lithium-aluminum target tubes, neptunium assemblies, and miscellaneous components for the production reactors. The results of the holdup assays are essential for determining compliance with the Waste Acceptance Criteria, Material Control & Accountability, and to meet criticality safety controls. This report covers holdup measurements on two sawbench components that were used for cutting U-Al fuel rods. The benches contained U-Al residue scattered on the bench tops and bagged up in plastic containers. It was very important to obtain an estimate of the HEU content of this residue in order to remove criticality concerns before vacuuming it into a much smaller volume. A portable high purity germanium (HPGe) detection system and a portable sodium iodide (NaI) detection system were used to determine highly enriched uranium (HEU) holdup and to determine holdup Np-237 and Am-241 that were observed in these components. The measured Np-237 and Am-241 contents were especially important in these components …
Date:
July 2, 2004
Creator:
Dewberry, R
Object Type:
Report
System:
The UNT Digital Library
Seminole Sentinel (Seminole, Tex.), Vol. 93, No. 74, Ed. 1 Sunday, July 2, 2000
Semiweekly newspaper from Seminole, Texas that includes local, state, and national news along with advertising.
Date:
July 2, 2000
Creator:
Dow, M. Gene & Fisher, David
Object Type:
Newspaper
System:
The Portal to Texas History
Newton County News (Newton, Tex.), Vol. 39, No. 50, Ed. 1 Wednesday, July 2, 2008
Weekly newspaper from Newton, Texas that includes local, state and national news along with extensive advertising.
Date:
July 2, 2008
Creator:
Dussetschleger, Anne
Object Type:
Newspaper
System:
The Portal to Texas History
Full-wave Simulations of LH Wave Propagation in Toroidal Plasma with non-Maxwellian Electron Distributions
Abstract: The generation of energetic tails in the electron distribution function is intrinsic to lower-hybrid (LH) heating and current drive in weakly collisional magnetically confined plasma. The effects of these deformations on the RF deposition profile have previously been examined within the ray approximation. Recently, the calculation of full-wave propagation of LH waves in a thermal plasma has been accomplished using an adaptation of the TORIC code. Here, initial results are presented from TORIC simulations of LH propagation in a toroidal plasma with non-thermal electrons. The required efficient computation of the hot plasma dielectric tensor is accomplished using a technique previously demonstrated in full-wave simulations of ICRF propagation in plasma with non-thermal ions.
Date:
July 2, 2007
Creator:
E.J. Valeo, C.K. Phillips, P.T. Bonoli, J.C. Wright, M. Brambilla, and the RF SciDAC Team
Object Type:
Article
System:
The UNT Digital Library
Military Housing Privatization Initiative: Background and Issues
None
Date:
July 2, 2001
Creator:
Else, Daniel H.
Object Type:
Report
System:
The UNT Digital Library
The Wylie News (Wylie, Tex.), Vol. 56, No. 6, Ed. 1 Wednesday, July 2, 2003
Weekly newspaper from Wylie, Texas that includes local, state and national news along with advertising.
Date:
July 2, 2003
Creator:
Engbrock, Chad B.
Object Type:
Newspaper
System:
The Portal to Texas History
Oral History Interview with Fred Faiz, July 2, 2007
The National Museum of the Pacific War presents an oral interview with Fred Faiz. Faiz was raised on a ranch and had good relations with neighboring Japanese-American farmers before the war. In 1939, he joined the Civilian Conservation Corps, with whom he worked until being drafted into the Army in March 1941. He was assigned to the First Cavalry Division at Fort Bliss. When his unit phased out horse-drawn Howitzers and transitioned to driving jeeps, Faiz was sent to Louisiana, where he trained as a machine-gunner. Faiz saw his first combat in New Guinea and encountered banzai charges in the Admiralty Islands, with Los Negros defended by 10,000 elite Japanese Marines. In the jungle, Faiz and his unit set traps by staging their hammocks with makeshift dummies and watching from afar as Japanese soldiers approached. On Luzon, he participated in the liberation of Santo Tomas and fought inside Manila. Faiz returned home and was discharged in late 1945. Having contracted malaria, he experienced symptoms for another 10 years. Although he felt the war unfairly biased people against Japanese-Americans, he saw hostility towards them eventually subside.
Date:
July 2, 2007
Creator:
Faiz, Fred
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Fred Faiz, July 2, 2007
The National Museum of the Pacific War presents an oral interview with Fred Faiz. Faiz was raised on a ranch and had good relations with neighboring Japanese-American farmers before the war. In 1939, he joined the Civilian Conservation Corps, with whom he worked until being drafted into the Army in March 1941. He was assigned to the First Cavalry Division at Fort Bliss. When his unit phased out horse-drawn Howitzers and transitioned to driving jeeps, Faiz was sent to Louisiana, where he trained as a machine-gunner. Faiz saw his first combat in New Guinea and encountered banzai charges in the Admiralty Islands, with Los Negros defended by 10,000 elite Japanese Marines. In the jungle, Faiz and his unit set traps by staging their hammocks with makeshift dummies and watching from afar as Japanese soldiers approached. On Luzon, he participated in the liberation of Santo Tomas and fought inside Manila. Faiz returned home and was discharged in late 1945. Having contracted malaria, he experienced symptoms for another 10 years. Although he felt the war unfairly biased people against Japanese-Americans, he saw hostility towards them eventually subside.
Date:
July 2, 2007
Creator:
Faiz, Fred
Object Type:
Text
System:
The Portal to Texas History
Power Losses in the ILC 20-Mrad Extraction Line at 1-TeV
The authors have performed a detailed study of the power losses in the post-collision extraction line of a TeV e{sup +}e{sup -} collider with a crossing angle of 20 mrad at the interaction point. Five cases were considered: four luminosity configurations for ILC and one for CLIC. For all of them, the strong beam-beam effects at the interaction point lead to an emittance growth for the outgoing beam, as well as to the production of beamstrahlung photons and e{sup +}e{sup -} coherent pairs. The power losses along the extraction line, which are due to energy deposition by a fraction of the disrupted beam, of the beamstrahlung photons and of the coherent pairs, were estimated in the case of ideal collisions, as well as with a vertical position or angular offset at the interaction point.
Date:
July 2, 2007
Creator:
Ferrari, Arnaud; U., /Uppsala & Nosochkov, Yuri
Object Type:
Article
System:
The UNT Digital Library
Seminole Sentinel (Seminole, Tex.), Vol. 95, No. 75, Ed. 1 Wednesday, July 2, 2003
Semi-weekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
July 2, 2003
Creator:
Fisher, David
Object Type:
Newspaper
System:
The Portal to Texas History
The Sachse News (Sachse, Tex.), Vol. 5, No. 23, Ed. 1 Thursday, July 2, 2009
Weekly newspaper from Sachse, Texas that includes local, state and national news along with advertising.
Date:
July 2, 2009
Creator:
Fisher, Donnita Nesbit
Object Type:
Newspaper
System:
The Portal to Texas History
Field Operations Program - Neighborhood Electric Vehicle Fleet Use
This report summarizes a study of 15 automotive fleets that operate neighborhood electric vehicles (NEVs) in the United States. The information was obtained to help Field Operations Program personnel understand how NEVs are being used, how many miles they are being driven, and if they are being used to replace other types of fleet vehicles or as additions to fleets. (The Field Operations Program is a U.S. Department of Energy Program within the DOE Office of Energy Efficiency and Renewable Energy, Transportation Technologies). The NEVs contribution to petroleum avoidance and cleaner air can be estimated based on the miles driven and by assuming gasoline use and air emissions values for the vehicles being replaced. Gasoline and emissions data for a Honda Civic are used as the Civic has the best fuel use for a gasoline-powered vehicle and very clean emissions. Based on these conservation assumptions, the 348 NEVs are being driven a total of about 1.2 million miles per year. This equates to an average of 3,409 miles per NEV annually or 9 miles per day. It is estimated that 29,195 gallons of petroleum use is avoided annually by the 348 NEVs. This equates to 87 gallons of petroleum use …
Date:
July 2, 2001
Creator:
Francfort, J. E. & Carroll, M. R.
Object Type:
Report
System:
The UNT Digital Library
Thermochemical Study of Three Hindered Pyridine Derivatives
Article discussing a thermochemical study of three hindered pyridine derivatives.
Date:
July 2, 2008
Creator:
Freitas, Vera L. S.; Acree, William E. (William Eugene) & Silva, Maria D. M. C. Ribeiro da
Object Type:
Article
System:
The UNT Digital Library