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[Project Summary: Deepwater Program: The Technology and Economics of Deepwater Production Projects] (open access)

[Project Summary: Deepwater Program: The Technology and Economics of Deepwater Production Projects]

Report summary describing the work completed at ABS Group, Inc. for 'Deepwater Program: The Technology and Economics of Deepwater Production Projects'. It includes background information on the project funding and sponsorship, goals, methodology, and findings.
Date: May 2004
Creator: ABS Group, Inc.
Object Type: Text
System: The UNT Digital Library
Hydrogen Storage Properties of the Tetrahydrofuran Treated Magnesium (open access)

Hydrogen Storage Properties of the Tetrahydrofuran Treated Magnesium

The electronic structure, crystalline feature and morphology of the tetrahydrofuran (THF) treated magnesium, along with its hydriding and dehydriding properties have been investigated. The THF treated magnesium absorbs 6.3 wt per cent hydrogen at 723K and 3.5 MPa. After hydrogenation, in addition to the expected MgH2, a new less-stable hydride phase appears at 673K, but not at a lower temperature. Desorption produces 5.5 wt per cent hydrogen at 723K against a back pressure of 1.3 Pa after 20 cycles of hydriding-dehydriding. The THF treatment improves the kinetics of hydrogen absorption and desorption significantly. From 723K to 623K, the THF treated Mg demonstrates acceptable reaction rates. XPS studies show that tetrahydrofuran treatment causes the electronic energy state of the magnesium surface atoms to change, but the XRD studies show the crystal structure remains unchanged. Metallographic observation of the bulk hydrides of THF treated magnesium reveal they are poly-crystalline wi th the wide-spreading slip bands and twins within the crystals, indicating the phase transformation upon hydriding causes serious stress and distortion. It appears this microstructural deformation explains the much higher energy requirements (higher pressure and temperature) for magnesium hydrogenation than the simple lattice expansion that accompany hydrogen uptake for LaNi5 and FeTi.
Date: May 25, 2004
Creator: AU, MING
Object Type: Article
System: The UNT Digital Library
LSST data pipeline prototyping plans and strategy (open access)

LSST data pipeline prototyping plans and strategy

In this document we describe our approach and strategy for building the prototype for the image-stream analysis data pipeline. We start by describing the main research areas upon which we will be focusing; we then describe our plans on how to carry these research ideas to implement the data pipeline.
Date: May 27, 2004
Creator: Abdulla, G. M.; Brase, J.; Cook, K. & Miller, M.
Object Type: Report
System: The UNT Digital Library
Scientific Report (2002-2004) (open access)

Scientific Report (2002-2004)

OAK-B135 An overview of our work as well as two recent publications are contained in this scientific report. The work reported here revolves around the discovery of new coherent nonlinear kinetic waves in laser produced plasmas, we call KEEN waves (kinetic, electrostatic electron nonlinear waves), and optical mixing experiments on the Imega laser system at LLE with blue-green light for the exploration of ways to suppress parametric instabilities in long scale length, long pulsewidth laser-plasmas such as those which will be found on NIF or LMJ.
Date: May 11, 2004
Creator: Afeyan, Bedros
Object Type: Report
System: The UNT Digital Library
ORNL Cray X1 Evaluation Status Report (open access)

ORNL Cray X1 Evaluation Status Report

On August 15, 2002 the Department of Energy (DOE) selected the Center for Computational Sciences (CCS) at Oak Ridge National Laboratory (ORNL) to deploy a new scalable vector supercomputer architecture for solving important scientific problems in climate, fusion, biology, nanoscale materials and astrophysics. ''This program is one of the first steps in an initiative designed to provide U.S. scientists with the computational power that is essential to 21st century scientific leadership,'' said Dr. Raymond L. Orbach, director of the department's Office of Science. In FY03, CCS procured a 256-processor Cray X1 to evaluate the processors, memory subsystem, scalability of the architecture, software environment and to predict the expected sustained performance on key DOE applications codes. The results of the micro-benchmarks and kernel bench marks show the architecture of the Cray X1 to be exceptionally fast for most operations. The best results are shown on large problems, where it is not possible to fit the entire problem into the cache of the processors. These large problems are exactly the types of problems that are important for the DOE and ultra-scale simulation. Application performance is found to be markedly improved by this architecture: - Large-scale simulations of high-temperature superconductors run 25 times …
Date: May 1, 2004
Creator: Agarwal, P. K.; Alexander, R. A.; Apra, E.; Balay, S.; Bland, A. S.; Colgan, J. et al.
Object Type: Article
System: The UNT Digital Library
Question of Honor (open access)

Question of Honor

My thesis, Question of Honor, addresses the premise of women's lack of choice in relation to men's honor, and vengeance; concepts that are closely connected to the oppressive world of women in Pakistan. These works deal with concepts of purity and minor transgressions that have an impact on the lives of women in relation to family names and the associative feelings of humiliation linked to men. The subtle nuances of women and their reactions to oppression give a strong emotive content to the work.
Date: May 2004
Creator: Agha, Anila Quayyum
Object Type: Thesis or Dissertation
System: The UNT Digital Library

Baeyer-Villiger Oxidation of 1,7- & 1,9-dibromopentacyclo[5.4.0.02,6.03,10.05,9]undecane-8,11-dione

Access: Use of this item is restricted to the UNT Community
Baeyer-Villiger oxidation of 1,9-dibromopentacyclo[5.4.0.02,6.03,10.05,9]undecane-8,11-dione (1,9-dibromo-PCU-8,11-dione) was performed by using an excess amount of m-chloroperbenzoic acid (3 equivalents) and resulted in the formation of the corresponding monolactone. The reaction would not proceed to the dilactone stage. The structure of the reaction product was established unequivocally via single crystal X-ray diffraction. Baeyer-Villiger oxidation of 1,9-dibromo-PCU-8,11-dione using ceric ammonium nitrate (CAN) was also performed and afforded a mixture of lactones. Only one of these lactones, which also contained an alkene functionality, could be isolated and characterized. 1,7-dibromo-PCU-8,11-dione was also reacted with CAN, yielding the mono-lactone, which has also been characterized.
Date: May 2004
Creator: Akinola, Adeniyi O.
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Impact of Interference Model on Capacity in CDMA Cellular Networks (open access)

Impact of Interference Model on Capacity in CDMA Cellular Networks

This paper discusses an impact of interference model on capacity in CDMA cellular networks.
Date: May 2004
Creator: Akl, Robert G. & Parvez, Asad
Object Type: Paper
System: The UNT Digital Library
Development of a Novel Catalyst for NO Decomposition (open access)

Development of a Novel Catalyst for NO Decomposition

Air pollution arising from the emission of nitrogen oxides as a result of combustion taking place in boilers, furnaces and engines, has increasingly been recognized as a problem. New methods to remove NO{sub x} emissions significantly and economically must be developed. The current technology for post-combustion removal of NO is the selective catalytic reduction (SCR) of NO by ammonia or possibly by a hydrocarbon such as methane. The catalytic decomposition of NO to give N{sub 2} will be preferable to the SCR process because it will eliminate the costs and operating problems associated with the use of an external reducing species. The most promising decomposition catalysts are transition metal (especially copper)-exchanged zeolites, perovskites, and noble metals supported on metal oxides such as alumina, silica, and ceria. The main shortcoming of the noble metal reducible oxide (NMRO) catalysts is that they are prone to deactivation by oxygen. It has been reported that catalysts containing tin oxide show oxygen adsorption behavior that may involve hydroxyl groups attached to the tin oxide. This is different than that observed with other noble metal-metal oxide combinations, which have the oxygen adsorbing on the noble metal and subsequently spilling over to the metal oxide. This observation …
Date: May 1, 2004
Creator: Akyurtlu, Ates & Akyurtlu, Jale F.
Object Type: Report
System: The UNT Digital Library
Microchannel Cooled Edge Cladding to Establish an Adiabatic Boundary Condition in a Slab Laser (open access)

Microchannel Cooled Edge Cladding to Establish an Adiabatic Boundary Condition in a Slab Laser

The present invention provides an edge cladding for a slab laser, the edge cladding comprising a cooling channel system therein.
Date: May 18, 2004
Creator: Albrecht, Georg F.; Beach, Raymond J. & Solarz, Richard W.
Object Type: Text
System: The UNT Digital Library
Supernova/Acceleration Probe: A Satellite Experiment to Study the Nature of the Dark Energy (open access)

Supernova/Acceleration Probe: A Satellite Experiment to Study the Nature of the Dark Energy

The Supernova/Acceleration Probe (SNAP) is a proposed space-based experiment designed to study the dark energy and alternative explanations of the acceleration of the Universes expansion by performing a series of complementary systematics-controlled astrophysical measurements. We here describe a self-consistent reference mission design that can accomplish this goal with the two leading measurement approaches being the Type Ia supernova Hubble diagram and a wide-area weak gravitational lensing survey. This design has been optimized to first order and is now under study for further modification and optimization. A 2-m three-mirror anastigmat wide-field telescope feeds a focal plane consisting of a 0.7 square-degree imager tiled with equal areas of optical CCDs and near infrared sensors, and a high efficiency low-resolution integral field spectrograph. The instrumentation suite provides simultaneous discovery and light-curve measurements of supernovae and then can target individual objects for detailed spectral characterization. The SNAP mission will discover thousands of Type Ia supernovae out to z = 3 and will obtain high-signal-to-noise calibrated light-curves and spectra for a subset of > 2000 supernovae at redshifts between z = 0.1 and 1.7 in a northern field and in a southern field. A wide-field survey covering one thousand square degrees in both northern and …
Date: May 12, 2004
Creator: Aldering, G.; Althouse, W.; Amanullah, R.; Annis, J.; Astier, P.; Baltay, C. et al.
Object Type: Article
System: The UNT Digital Library
Radiation dose measurements of the insertion devices using radiachromic film dosimeters. (open access)

Radiation dose measurements of the insertion devices using radiachromic film dosimeters.

The Advanced Photon Source (APS) uses Nd-Fe-B permanent magnets in the insertion devices to produce x-rays for scientific research [1,2]. Earlier investigations have exhibited varying degrees of demagnetization of these magnets [3] due to irradiation from electron beams [4,5,6], {sup 60}Co {gamma}-rays [5], and high-energy neutrons [7,8]. Radiation-induced demagnetization has been observed in the APS insertion devices [9] and was first measured in December of 2001. Partial demagnetization has also been observed in insertion devices at the European Synchrotron Radiation Facility (ESRF) [4,6], where Nd-Fe-B permanent magnets are also used. Growing concern for the lifetime of APS insertion devices, as well as the permanent magnets that will be used in next-generation, high-power light sources, like the FEL [10,11], resulted from the partial demagnetization observations made at both facilities. This concern in relation to radiation-induced demagnetization spurred a long-term project to measure and analyze the absorbed doses received by the APS insertion devices. The project required a reliable photon high-dose dosimetry technique capable of measuring absorbed doses greater than 10{sup 6} rad, which was not readily available at the APS. Through a collaboration with the National Institute of Standards and Technology (NIST), one such technique using radiachromic films was considered, tested, …
Date: May 25, 2004
Creator: Alderman, J.; Semones, E. & Job, P. K.
Object Type: Report
System: The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 19, Ed. 1 Thursday, May 6, 2004 (open access)

Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 19, Ed. 1 Thursday, May 6, 2004

Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date: May 6, 2004
Creator: Alexander, Nancy
Object Type: Newspaper
System: The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 20, Ed. 1 Thursday, May 13, 2004 (open access)

Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 20, Ed. 1 Thursday, May 13, 2004

Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date: May 13, 2004
Creator: Alexander, Nancy
Object Type: Newspaper
System: The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 21, Ed. 1 Thursday, May 20, 2004 (open access)

Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 21, Ed. 1 Thursday, May 20, 2004

Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date: May 20, 2004
Creator: Alexander, Nancy
Object Type: Newspaper
System: The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 22, Ed. 1 Thursday, May 27, 2004 (open access)

Timpson & Tenaha News (Timpson, Tex.), Vol. 19, No. 22, Ed. 1 Thursday, May 27, 2004

Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date: May 27, 2004
Creator: Alexander, Nancy
Object Type: Newspaper
System: The Portal to Texas History
Electron Line Broadening in Plasmas: Resolution of the Quantum vs. Semiclassical Calculations Puzzle (open access)

Electron Line Broadening in Plasmas: Resolution of the Quantum vs. Semiclassical Calculations Puzzle

Puzzling discrepancies between on the one hand quantum mechanical (QM) electron impact calculations of isolated ion lines and on the other hand experimental data and nonperturbative semiclassical (SC) calculations are reviewed. The origin of these discrepancies was a standard line-broadening literature estimate of the wavefunction extent. The nonperturbative semiclassical calculations are further improved by dropping the long-range approximation and allowing penetrating collisions. This results in excellent agreement with fully quantal calculations for the case of the BIII 2s-2p line. On the other hand the standard perturbative semiclassical method is inadequate even in this particular example, where perturbation theory is valid. Further, the assumption of neglecting the back-reaction in semiclassical calculations is examined.
Date: May 11, 2004
Creator: Alexiou, S & Lee, R
Object Type: Article
System: The UNT Digital Library
Smart Screening System (S3) In Taconite Processing (open access)

Smart Screening System (S3) In Taconite Processing

The conventional vibrating machines used in processing plants have had undesirable high noise and vibration levels. They also have had unsatisfactorily low screening efficiency, high energy consumption, high maintenance cost, low productivity, and poor worker safety. These conventional vibrating machines have been used in most every processing plant. Most of the current material separation technology uses heavy and inefficient electric motors with an unbalance rotating mass to generate the shaking. In addition to being excessively noisy, inefficient, and high-maintenance, these vibrating machines are often the bottleneck in the entire process. Furthermore, these motors, along with the vibrating machines and supporting structure, shake other machines and structures in the vicinity. The latter increases maintenance costs while reducing worker health and safety. The conventional vibrating fine screens at taconite processing plants have had the same problems as those listed above. This has resulted in lower screening efficiency, higher energy and maintenance cost, and lower productivity and workers safety concerns. The focus of this work is on the design of a high performance screening machine suitable for taconite processing plants. SmartScreens{trademark} technology uses miniaturized motors, based on smart materials, to generate the shaking. The underlying technologies are Energy Flow Control{trademark} and Vibration Control …
Date: May 1, 2004
Creator: Allaei, Daryoush; Mohammed, Asim Syed & Tarnowski, David
Object Type: Report
System: The UNT Digital Library
Vestibule and Cask Preparation Mechanical Handling Calculation (open access)

Vestibule and Cask Preparation Mechanical Handling Calculation

The scope of this document is to develop the size, operational envelopes, and major requirements of the equipment to be used in the vestibule, cask preparation area, and the crane maintenance area of the Fuel Handling Facility. This calculation is intended to support the License Application (LA) submittal of December 2004, in accordance with the directive given by DOE correspondence received on the 27th of January 2004 entitled: ''Authorization for Bechtel SAIC Company L.L.C. to Include a Bare Fuel Handling Facility and Increased Aging Capacity in the License Application, Contract Number DE-AC28-01R W12101'' (Ref. 167124). This correspondence was appended by further correspondence received on the 19th of February 2004 entitled: ''Technical Direction to Bechtel SAIC Company L.L. C. for Surface Facility Improvements, Contract Number DE-AC28-01R W12101; TDL No. 04-024'' (Ref. 16875 1). These documents give the authorization for a Fuel Handling Facility to be included in the baseline. The limitations of this preliminary calculation lie within the assumptions of section 5 , as this calculation is part of an evolutionary design process.
Date: May 26, 2004
Creator: Ambre, N.
Object Type: Report
System: The UNT Digital Library
The Newsletter of the Texas Chapter of the American Fisheries Society, Volume 30, Number 1, Summer 2004 (open access)

The Newsletter of the Texas Chapter of the American Fisheries Society, Volume 30, Number 1, Summer 2004

Newsletter of the Texas Chapter of the American Fisheries Society containing information about the organization, membership, and field of aquaculture and ecosystem management.
Date: May 2004
Creator: American Fisheries Society. Texas Chapter.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
New Heterogeneous Catalysts for the Selective Reduction of NOx under Lean Conditions. Final Report (open access)

New Heterogeneous Catalysts for the Selective Reduction of NOx under Lean Conditions. Final Report

The original goal of this program was the identification and design of new noble-metal-based catalysts for the selective catalytic reduction of nitric oxide by hydrocarbons under excess oxygen (i.e., ''lean'') conditions (HC-SCR). Work conducted in the first funding cycle of this award (i.e., 1997-2000) was successful in allowing us to develop an understanding of the fundamental surface chemistry taking place during the adsorption and reaction of nitrogen oxides and propylene on the surface of supported noble metal catalysts. Both experimental results collected in our own group as well as molecular simulation results published by Professor Neurock suggested that in order to improve the performance of the Pt catalysts--in terms of the nitrogen selectivity and the temperature window of operation-- it was necessary to introduce a second metal. However, synthesizing such catalysts with the metals of interest (i.e., Pt-Au, Pt-Ru, Pt-Rh, etc.) with some degree of control of the structure and composition of the resulting supported metal particles is in itself a research challenge. Consequently, the bulk of our efforts during the second funding cycle of this award (covered by this report) was shifted to the use of organometallic cluster precursors for the synthesis on novel bimetallic catalysts. During this time …
Date: May 31, 2004
Creator: Amiridis, M. D.
Object Type: Report
System: The UNT Digital Library
Oral History Interview with Dana Anderson, May 13, 2004 transcript

Oral History Interview with Dana Anderson, May 13, 2004

The National Museum of the Pacific War presents an oral interview with Dana Anderson. Anderson was born in Manhattan, Kansas on 30 November 1924 and joined the Navy on 2 December 1942. After completing boot camp at the Great Lakes Naval Training Center, Illinois he was sent to San Diego where he trained on the Diesel engines on LCMs. After the training was complete he was assigned to USS Ashland (LSD-1), which was capable of carrying 18 LCMs. After making practice landings in Hawaii with the 2nd Marine Division, the Ashland participated in the invasion of Tarawa. Anderson’s LCM was left on the beach as it was disabled by Japanese shellfire. He returned to the Ashland and later participated in the invasions of Eniwetok and Kwajalein. Returning to the United States, he was sent to Cleveland, Ohio where he received additional training with Diesel engines. He was then assigned to an ocean-going tug hauling concrete forms to the Philippines. This tug was pulling another ship back to the US when the war ended.
Date: May 13, 2004
Creator: Anderson, Dana
Object Type: Sound
System: The Portal to Texas History
Oral History Interview with Dana Anderson, May 13, 2004 (open access)

Oral History Interview with Dana Anderson, May 13, 2004

The National Museum of the Pacific War presents an oral interview with Dana Anderson. Anderson was born in Manhattan, Kansas on 30 November 1924 and joined the Navy on 2 December 1942. After completing boot camp at the Great Lakes Naval Training Center, Illinois he was sent to San Diego where he trained on the Diesel engines on LCMs. After the training was complete he was assigned to USS Ashland (LSD-1), which was capable of carrying 18 LCMs. After making practice landings in Hawaii with the 2nd Marine Division, the Ashland participated in the invasion of Tarawa. Anderson’s LCM was left on the beach as it was disabled by Japanese shellfire. He returned to the Ashland and later participated in the invasions of Eniwetok and Kwajalein. Returning to the United States, he was sent to Cleveland, Ohio where he received additional training with Diesel engines. He was then assigned to an ocean-going tug hauling concrete forms to the Philippines. This tug was pulling another ship back to the US when the war ended.
Date: May 13, 2004
Creator: Anderson, Dana
Object Type: Text
System: The Portal to Texas History