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N-15 SIGNALS OF NITROGEN SOURCE AND FATE IN A SEMI-ARID WETLANDS
None
Date:
August 1, 2001
Creator:
Heikoop, J. M. & Hickmott, D. D.
Object Type:
Article
System:
The UNT Digital Library
2001 Joint ADVISOR/PSAT Vehicle Systems Modeling User's Conference Proceedings (CD)
The 2001 Joint ADVISOR/PSAT Vehicle Systems Modeling User Conference provided an opportunity for engineers in the automotive industry and the research environment to share their experiences in vehicle systems modeling using ADVISOR and PSAT. ADVISOR and PSAT are vehicle systems modeling tools developed and supported by the National Renewable Energy Laboratory and Argonne National Laboratory respectively with the financial support of the US Department of Energy. During this conference peers presented the results of studies using the simulation tools and improvements that they have made or would like to see in the simulation tools. Focus areas of the presentations included Control Strategy, Model Validation, Optimization and Co-Simulation, Model Development, Applications, and Fuel Cell Vehicle Systems Analysis. Attendees were offered the opportunity to give feedback on future model development plans.
Date:
August 1, 2001
Creator:
Markel, T.
Object Type:
Article
System:
The UNT Digital Library
D. A. Kolb’s Theory of Experiential Learning: Implications for the Development of Music Theory Instructional Material
This research project evaluates the effectiveness of specific music theory instructional strategies in terms of D. A. Kolb’s theory of experiential learning and Kolb’s typology of individual learning style. The project provides an original methodology for the adaptation of music theory instructional material to the individual learning style types described in Kolb’s typology. The study compares the relative effectiveness of two music theory instructional sequences, one of which is adapted for all of the learning style modalities described in Kolb’s typology, and the other adapted for only a limited number of Kolb’s learning style types. In order to compare the potential “learning outcomes” produced by these instructional sequences, a detailed study is proposed, in which computer based instruction (CBI) will deliver the instructional sequences to research participants and electronically record the participants’ responses. The current study demonstrates the effective aspects of the original methodology and suggests methods for the successful adaptation of music theory instructional material to individual student learning styles.
Date:
August 2001
Creator:
Lively, Michael
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Accelerator Mass Spectrometry Measurements of Plutonium in Sediment and Seawater from the Marshall Islands
During the summer 2000, I was given the opportunity to work for about three months as a technical trainee at Lawrence Livermore National Laboratory, or LLNL as I will refer to it hereafter. University of California runs this Department of Energy laboratory, which is located 70 km east of San Francisco, in the small city of Livermore. This master thesis in Radioecology is based on the work I did here. LLNL, as a second U.S.-facility for development of nuclear weapons, was built in Livermore in the beginning of the 1950's (Los Alamos in New Mexico was the other one). It has since then also become a 'science center' for a number of areas like magnetic and laser fusion energy, non-nuclear energy, biomedicine, and environmental science. The Laboratory's mission has changed over the years to meet new national needs. The following two statements were found on the homepage of LLNL (http://www.llnl.gov), at 2001-03-05, where also information about the laboratory and the scientific projects that takes place there, can be found. 'Our primary mission is to ensure that the nation's nuclear weapons remain safe, secure, and reliable and to prevent the spread and use of nuclear weapons worldwide'. 'Our goal is to …
Date:
August 1, 2001
Creator:
Leisvik, M & Hamilton, T
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
ADENOVIRUS INTERACTION WITH ITS CELLULAR RECEPTOR CAR.
The mechanism of adenovirus attachment to the host cell plasma membrane has been revealed in detail by research over the past 10 years. It has long been known that receptor binding activity is associated with the viral fibers, trimeric spike proteins that protrude radially from the vertices of the icosahedral capsid (Philipson et al. 1968). In some adenovirus serotypes, fiber and other virus structural proteins are synthesized in excess and accumulate in the cell nucleus during late stages of infection. Fiber protein can be readily purified from lysates of cells infected with subgroup C viruses, for example Ad2 and Ad5 (Boulanger and Puvion 1973). Addition of purified fiber protein to virus suspensions during adsorption strongly inhibits infection, indicating that fiber and intact virus particles compete for binding sites on host cells (Philipson et al. 1968; Hautala et al. 1998). Cell binding studies using purified radiolabeled fiber demonstrated that fiber binds specifically and with high affinity to the cell plasma membrane, and that cell lines typically used for laboratory propagation of adenovirus have approximately 10{sup 4} high-affinity receptor sites per cell (Persson et al. 1985; Freimuth 1996). Similar numbers of high-affinity binding sites for radiolabeled intact virus particles also were observed …
Date:
August 2001
Creator:
Howitt, J.; Anderson, C. W. & Freimuth, P.
Object Type:
Book
System:
The UNT Digital Library
Adtf Spoke Cavity Cryomodule Concept
None
Date:
August 1, 2001
Creator:
Kelley, J. P.; Roybal, P. L. & Al, Et
Object Type:
Article
System:
The UNT Digital Library
Advanced Computational Analysis of Disordered Materials and Clay Minerals
Final report describing a three-year research project applying various methods to study the structures of crystalline solids and also apply to polycrystalline disordered materials.
Date:
August 1, 2001
Creator:
Bish, David L. & Reynolds, R. C., Jr.
Object Type:
Report
System:
The UNT Digital Library
ADVANCED DATA PROCESSING FOR VOLUMETRIC COMPUTED TOMOGRAPHY DATA
Computed tomography (CT) has long been used by industry as a non-destructive evaluation technique for discovering flaws in parts before their use. Traditional linear array computed tomography systems acquired data at a rate that could be reconstructed simultaneously with data acquisition. With new area detectors, the data rate of acquisition has increased exponentially, and the reconstruction algorithm does not scale linearly with increased data. FlashCT DPS (Flat Panel Amorphous Silicon High Resolution Computed Tomography, Data Processing System) is a software package developed by M. Sheats, and A. Davis at LANL to meet the data processing demands of new flat panel array computed tomography. FlashCT--DPS combines several features unique to industrial computed tomography systems. It addresses traditional usability problems by providing an intuitive graphical user interface and powerful analysis tools. It includes the three major CT reconstruction algorithms: parallel backprojection, fan beam resorting, and Feldkamp cone beam. It also provides visualization tools for examination of data after processing. Finally, it is able to perform distributed data reconstruction with a near linear speed increase as a function of the number of processors used. Additionally, utility programs have been developed to support project editing and computing cluster management for the FlashCT system. FlashCT--DPS …
Date:
August 1, 2001
Creator:
BERKELEY, M. SHEATS - UC
Object Type:
Report
System:
The UNT Digital Library
ADVANCED DIRECT LIQUEFACTION CONCEPTS FOR PETC GENERIC UNITS
The results of Laboratory and Bench-Scale experiments and supporting technical and economic assessments conducted under DOE Contract No. DE-AC22-91PC91040 are reported for the period April 1, 2001 to June 30 2001. This work involves the introduction into the basic two-stage liquefaction process several novel concepts, which include dispersed lower-cost catalysts, coal cleaning by oil agglomeration, and distillate hydrotreating and dewaxing. This project has been modified to include an investigation into the production of value added materials from coal using low-severity liquefaction based technologies.
Date:
August 1, 2001
Creator:
Berkovich, Adam J.
Object Type:
Report
System:
The UNT Digital Library
Advanced Mass Spectrometers for Hydrogen Isotope Analyses
This report is a summary of the results of a joint Savannah River Laboratory (SRL) - Savannah River Plant (SRP) ''Hydrogen Isotope Mass Spectrometer Evaluation Program''. The program was undertaken to evaluate two prototype hydrogen isotope mass spectrometers and obtain sufficient data to permit SRP personnel to specify the mass spectrometers to replace obsolete instruments.
Date:
August 1, 2001
Creator:
Chastagner, P.
Object Type:
Report
System:
The UNT Digital Library
The Age, Volume 24, Number 8, August 2001
Monthly publication containing information related to Chambers County, Texas, including current events of the Chambers County Historical Commission, the Wallisville Heritage Park, and the Chambers County historical and genealogical societies; reprinted newspaper articles about county events and citizens; and historical news and records.
Date:
August 2001
Creator:
Wallisville Heritage Park (Organization)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Alternative Fuel News: Official Publication of the U.S. Department of Energy's Clean Cities Network and the Alternative Fuels Data Center; Vol. 5, No. 2
A quarterly magazine with articles the proposed National Energy Policy; the 2001 National Clean Cities Conference including Clean Cities Coalition Award and National Partner Award recipients; station cars (shared my multiple drivers); and new emissions-reducing incentives in Texas.
Date:
August 1, 2001
Creator:
LaRocque, T.
Object Type:
Book
System:
The UNT Digital Library
An Alternative Scheme for the Neutrino Factory with a High Power Proton Driver
N/A
Date:
August 1, 2001
Creator:
Ruggiero, Alessandro G.
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 102, No. 130, Ed. 1 Wednesday, August 1, 2001
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 1, 2001
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Alvin Advertiser (Alvin, Tex.), Ed. 1 Wednesday, August 1, 2001
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
August 1, 2001
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
Amplitude Modulation of Atomic Wavefunctions - Final Technical Report
This project developed a novel wave function modulation technique. Other modulation techniques use tailored laser pulses to directly excite a time-dependent, modulated wave function from a ground state. Our technique began with one electron already excited to a time independent eigenfunction. Then, by using excitations of a second valence electron, we modulated the other wave function. Our technique had the benefit that it was very efficient, and required low power lasers with no need for precise phase or amplitude control. On the other hand it had the difficulty of being a multi-step laser excitation with a maximum repetition rate of 10 Hz. Over the course of this project, we showed that the technique did work, and work efficiently. However, it was easy to generalize. Since the modulation depended on a difference between electron-electron interactions with the inner electron in a ground or excited state, the efficiency of the modulation was strongly state dependent. For example, we never showed any significant modulation in our tests of barium states, while our strontium measurements did show efficient modulation as long as the state to be modulated was in the 5snd group with n between 30 and 50. We completed some studies of the …
Date:
August 1, 2001
Creator:
Cooke, William E.
Object Type:
Report
System:
The UNT Digital Library
ANALYSIS OF COMBINED FWCD AND NBI IN THE DIII-D TOKAMAK
In recent experiments with combined fast wave current drive (FWCD) and deuterium neutral beam injection on the DIII-D tokamak [Luxon and Davis, Fusion Technol. 8, 441 (1985)], an enhanced fusion reactivity and fast ion energy content have been observed in the presence of FWCD, with a concomitant low FWCD efficiency [Petty et al., Radio Frequency Power in Plasmas (AIP, New York, 1997), p. 225]. In this paper, we investigate whether high-harmonic ion cyclotron damping could be responsible for the low FWCD efficiency in these experiments, since a number of high-harmonic hydrogen and deuterium cyclotron resonance layers existed in the plasma. The main analysis tool is the ICRF code PION [Eriksson, Hellsten and Willen, Nucl. Fusion 33, 1037 (1993)], modified to allow multiple frequencies simultaneously as was done in the DIII-D experiments. According to the PION modeling, high harmonic damping of fast wave power can give rise to enhanced fusion reactivity and fast ion energy content, which is consistent with the experimental observations.
Date:
August 1, 2001
Creator:
Mantsinen, M. J.; Petty, C. C.; Eriksson, L.-G.; Mau, T. K.; Pinsker, R. I. & Porkolab, M.
Object Type:
Article
System:
The UNT Digital Library
ANALYSIS OF COOK-OFF USING LOGIC MODELS
None
Date:
August 2001
Creator:
Luck, L. B.
Object Type:
Article
System:
The UNT Digital Library
Analysis of T Lymphocyte Turnover Rates Using Novel Models for the Study of Deuterated Glucose Uptake
None
Date:
August 1, 2001
Creator:
Ribeiro, Ruy M.; Mohri, H. & AL, ET
Object Type:
Presentation
System:
The UNT Digital Library
An Analysis of the Effect of Environmental and Systems Complexity on Information Systems Failures
Companies have invested large amounts of money on information systems development. Unfortunately, not all information systems developments are successful. Software project failure is frequent and lamentable. Surveys and statistical analysis results underscore the severity and scope of software project failure. Limited research relates software structure to information systems failures. Systematic study of failure provides insights into the causes of IS failure. More importantly, it contributes to better monitoring and control of projects and enhancing the likelihood of the success of management information systems. The underlining theories and literature that contribute to the construction of theoretical framework come from general systems theory, complexity theory, and failure studies. One hundred COBOL programs from a single company are used in the analysis. The program log clearly documents the date, time, and the reasons for changes to the programs. In this study the relationships among the variables of business requirements change, software complexity, program size and the error rate in each phase of software development life cycle are tested. Interpretations of the hypotheses testing are provided as well. The data shows that analysis error and design error occur more often than programming error. Measurement criteria need to be developed at each stage of the …
Date:
August 2001
Creator:
Zhang, Xiaoni
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
ANALYSIS ON THE DISTRIBUTION OF NUCLEAR MATERIAL THEFT/SMUGGLING SCENARIOS
None
Date:
August 1, 2001
Creator:
SCOTT, B. G.
Object Type:
Article
System:
The UNT Digital Library
Analytical Solutions for Sequentially Reactive Transport with Different Retardation Factors
Integral transforms have been widely used for deriving analytical solutions for solute transport systems. Often, analytical solutions can only be written in closed form in frequency domains and numerical inverse-transforms have to be involved to obtain semi-analytical solutions in the time domain. For this reason, previously published closed form solutions are restricted either to a small number of species or to the same retardation assumption. In this paper, we applied the solution scheme proposed by Bauer et al. in the time domain. Using available analytical solutions of a single species transport with first-order decay without coupling with its parent species concentration as fundamental solutions, a daughter species concentration can be expressed as a linear function of those fundamental solutions. The implementation of the solution scheme is straight forward and exact analytical solutions are derived for one- and three-dimensional transport systems.
Date:
August 1, 2001
Creator:
Sun, Y.; Buscheck, T. A.; Mansoor, K. & Lu, X.
Object Type:
Report
System:
The UNT Digital Library
Anti-Drug Media Campaign: Aspects of Advertising Contract Mismanaged by the Government; Contractor Improperly Charged Some Costs
Testimony issued by the General Accounting Office with an abstract that begins "This testimony discusses the Office of National Drug Control Policy's (ONDCP) advertising contract for Phase III of the National Youth Anti-Drug Media Campaign. GAO found that the contractor, Ogilvy & Mather, improperly charged the government for some of its labor costs incurred under this contract. Ogivley & Mather submitted time sheets claiming hours that some employees said they did not work on the anti-drug media campaign. In addition, the company made little progress toward restructuring its accounting system to meet government requirements until nearly two years after the contract was awarded. The government poorly managed aspects of the award and administration of the contract. The Department of Health and Human Services (HHS) should not have awarded this cost-reimbursement contract without determining whether the contractor had an adequate cost accounting system. In addition, HHS should have reviewed the appropriateness of the large amount of money that the technical representative recommended be disallowed from the contractor's invoices, or arranged for an audit of the contract. The technical representative appropriately brought allegations of improper billing to the attention of ONDCP management, but ONDCP management did not take prompt action to investigate …
Date:
August 1, 2001
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
Applicability of Unimodal Stochastic Approaches in Simulating Flow in Bimodal Heterogeneous Formations
None
Date:
August 1, 2001
Creator:
Lu, Z.; Zhang, D. & Keating, E.
Object Type:
Article
System:
The UNT Digital Library