Partner
UNT Libraries Government Documents Department
8,584
UNT Libraries Special Collections
3,070
Oklahoma Historical Society
1,590
Abilene Christian University Library
661
UNT Libraries
491
National Museum of the Pacific War/Admiral Nimitz Foundation
385
Sterling Municipal Library
250
Carl Albert Congressional Research and Studies Center
199
UNT Music Library
195
San Antonio Public Library
112
116 More
Collection
Office of Scientific & Technical Information Technical Reports
5,443
Texas Digital Newspaper Program
3,122
Congressional Research Service Reports
1,754
The Black Academy of Arts and Letters Records
1,589
Oklahoma Digital Newspaper Program
1,362
Tocker Foundation Grant
1,276
Abilene Library Consortium
790
Government Accountability Office Reports
653
ACU Summit Lecture Series
572
Jim Argo Collection
472
197 More
Degree Department
Degree Discipline
Degree Level
Country
States
Decade
Year
Month
18,179 Matching Results
Results open in a new window/tab.
Deeply virtual Compton scattering at small x
The authors calculate the cross section of the deeply virtual Compton scattering at large energies and intermediate momentum transfers. In recent years the study of the deeply virtual Compton scattering (DVCS) became one of the most popular topics in QCD due to the fact that it is determined by skewed parton distributions which generalize usual parton densities introduced by Feynman. These new probes of the nucleon structure are accessible in exclusive processes such as DVCS and potentially they can give more information than the traditional parton densities. In this paper the authors consider the small-x DVCS where the energy of the incoming virtual photon E is very large in comparison to its virtuality Q{sup 2}. To be specific, they calculate the DVCS amplitude in the region s >> Q{sup 2} >> -t >> m{sup 2} where s = 2mE, m is the nucleon mass, and t is the momentum transfer. The DVCS in this region is a semihard process which can be described by the BFKL (Balitsky-Fadin-Kuraev-Lipatov) pomeron. It turns out that at large momentum transfer the coupling of the BFKL pomeron to the nucleon is essentially equal to the Dirac form factor of the nucleon F{sub 1}(t), so the …
Date:
February 1, 2000
Creator:
Balitsky, I. & Kuchina, E.
Object Type:
Article
System:
The UNT Digital Library
Depleted uranium storage and disposal trade study: Summary report
The objectives of this study were to: identify the most desirable forms for conversion of depleted uranium hexafluoride (DUF6) for extended storage, identify the most desirable forms for conversion of DUF6 for disposal, evaluate the comparative costs for extended storage or disposal of the various forms, review benefits of the proposed plasma conversion process, estimate simplified life-cycle costs (LCCs) for five scenarios that entail either disposal or beneficial reuse, and determine whether an overall optimal form for conversion of DUF6 can be selected given current uncertainty about the endpoints (specific disposal site/technology or reuse options).
Date:
February 1, 2000
Creator:
Hightower, J.R. & Trabalka, J.R.
Object Type:
Report
System:
The UNT Digital Library
Design of a protocol for combined laser hyperthermia-photodynamic therapy in the esophagus
Photodynamic laser therapy (PDT) for esophageal cancer has recently been studied in animal and clinical trials. In several animal experiments a synergetic effect was found by simultaneously applying PDT and hyperthermia (HT). In this paper an optical fiber system is described which can be used in the esophagus for combined PDT with a 1 W dye laser and HT with a 15--40 W Nd-YAG laser. Phantoms were developed to simulate the geometry of the esophagus using cow muscle. The spatial-temporal temperature field during HT was measured. The results were compared with calculations using a coupled Monte Carlo laser transport/finite difference heat transport model using the LATIS computer program. Measurements and calculations yield a realistic description of the temperature distribution during HT under various experimental conditions. The LATIS program allows the prediction of the effects of blood perfusion for in-vivo situations. The results show that the perfusion has considerable influence on the temperature field, which must be considered for in-vivo applications.
Date:
February 1, 2000
Creator:
London, R A; Eichler, J; Liebetrudt, J & Ziegenhagen, L
Object Type:
Article
System:
The UNT Digital Library
Design Strategies for Optically-Accessible, High-Temperature, High-Pressure Reactor
The authors have developed two optical cell designs for high-pressure and high-temperature fluid research: one for flow systems, and the other for larger batch systems. The flow system design uses spring washers to balance the unequal thermal expansions of the reactor and the window materials. A typical design calculation is presented showing the relationship between system pressure, operating temperature, and torque applied to the window-retaining nut. The second design employs a different strategy more appropriate for larger windows. This design uses two seals: one for the window that benefits from system pressure, and a second one that relies on knife-edge, metal-to-metal contact.
Date:
February 1, 2000
Creator:
Rice, S. F.; Steeper, R. R.; LaJeunesse, C. A.; Hanush, R. G. & Aiken, J. D.
Object Type:
Report
System:
The UNT Digital Library
Design strategies for optically-accessible, high-temperature, high-pressure reactor
The authors have developed two optical cell designs for high-pressure and high-temperature fluid research: one for flow systems, and the other for larger batch systems. The flow system design uses spring washers to balance the unequal thermal expansions of the reactor and the window materials. A typical design calculation is presented showing the relationship between system pressure, operating temperature, and torque applied to the window-retaining nut. The second design employs a different strategy more appropriate for larger windows. This design uses two seals: one for the window that benefits from system pressure, and a second one that relies on knife-edge, metal-to-metal contact.
Date:
February 1, 2000
Creator:
Rice, S. F.; Steeper, R. R.; LaJeunesse, C. A.; Hanush, R. G. & Aiken, J. D.
Object Type:
Report
System:
The UNT Digital Library
DETERMINING PERFORMANCE WITH LIMITED TESTING WHEN RELIABILITY AND CONFIDENCE ARE MANDATED
None
Date:
February 1, 2000
Creator:
Dolin, Ronald M. & Treml, Christine A.
Object Type:
Article
System:
The UNT Digital Library
DETERMINING STRAIN/STRESS PROFILES IN PIGMA (PRESSURIZED INERT GAS METAL ARC) WELD BETWEEN BERYLLIUM METAL RINGS BY NEUTRON DIFFRACTION AND COMPARING RESULTS OBTAINED FROM FINITE ELEMENT ANALYSIS
None
Date:
February 1, 2000
Creator:
VARMA, R.; BROWN, D. W. & AL, ET
Object Type:
Article
System:
The UNT Digital Library
DEVELOPMENT INSIGHTS INTO EVOLVING SYSTEMS: ROLES OF DIVERSITY, NON-SELECTION, SELF-ORGANIZATION, SYMBIOSIS
None
Date:
February 1, 2000
Creator:
Johnson, N. L.
Object Type:
Article
System:
The UNT Digital Library
Development of the DOE Nuclear Criticality Safety Program Web Site for the Nuclear Criticality Safety Professional
Development of the DOE Nuclear Criticality Safety Program (NCSP) web site is the result of the efforts of marry members of the Nuclear Criticality Safety (NCS) community and is maintained by Lawrence Livermore National Laboratory under the direction of the NCSP Management Team. This World Wide Web (WWW) resource was developed as part of the DOE response to the DNFSB Recommendation 97-2, which reflected the need to make criticality safety information available to a wide audience. The NCSP web site provides information of interest to NCS professionals and includes links to other sites actively involved in the collection and dissemination of criticality safety information. To the extent possible, the hyperlinks on this web site direct the user to the original source of the referenced material in order to ensure access to the latest, most accurate version.
Date:
February 1, 2000
Creator:
Lee, C. K.; Huang, S.; Morman, J. A. & Garcia, A. S.
Object Type:
Article
System:
The UNT Digital Library
Development plan for an advanced drilling system with real-time diagnostics (Diagnostics-While-Drilling)
This proposal provides the rationale for an advanced system called Diagnostics-while-drilling (DWD) and describes its benefits, preliminary configuration, and essential characteristics. The central concept is a closed data circuit in which downhole sensors collect information and send it to the surface via a high-speed data link, where it is combined with surface measurements and processed through drilling advisory software. The driller then uses this information to adjust the drilling process, sending control signals back downhole with real-time knowledge of their effects on performance. The report presents background of related previous work, and defines a Program Plan for US Department of Energy (DOE), university, and industry cooperation.
Date:
February 2000
Creator:
Finger, John T.; Mansure, Arthur J.; Prairie, Michael R. & Glowka, D. A.
Object Type:
Report
System:
The UNT Digital Library
A device for efficiently and uniformly drying nonwoven materials using microwave energy: NICE3 forest products project fact sheet
This is a fact sheet on new microwave drying technology written for the NICE3 Program.
Date:
February 1, 2000
Creator:
National Renewable Energy Laboratory (U.S.)
Object Type:
Book
System:
The UNT Digital Library
DGS Newsletter, Volume 24, Number 2, February 2000
Newsletter of the Dallas Genealogical Society discussing membership, Society meetings, genealogical workshops and events, and other news of interest to members.
Date:
February 2000
Creator:
Dallas Genealogical Society
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Dispersively enhanced bunching in high-gain free-electron lasers
A free-electron laser using a multi-segment optical klystron (MSOK) is studied using a 3-D simulation code for use as 4th generation light sources. The MSOK consists of multiple wiggler segments with dipole triplets in the gaps. The dipole triplets impose a dogleg trajectory that ballistically enhances the electron beam bunching and the gain in the following wiggler segment. There are three principal advantages of the MSOK over single-segment wiggler designs. First, the saturation length is drastically reduced. Second, the MSOK is significantly less sensitive to beam energy spread. Third, the linewidth is carryover and can be tuned by varying the dipole field strength. As a result, the MSOK is an ideal configuration for 4th generation light sources.
Date:
February 1, 2000
Creator:
Freund, Henry P. & Neil, G. R.
Object Type:
Article
System:
The UNT Digital Library
The Double Oak Gazette (Double Oak, Tex.), Vol. 25, No. 2, Ed. 1 Tuesday, February 1, 2000
Monthly newspaper from Double Oak, Texas that includes news, information, and entertainment for residents of the Double Oak community along with advertising.
Date:
February 1, 2000
Creator:
Johnson, LaRue
Object Type:
Newspaper
System:
The Portal to Texas History
Dynamic Pressure of Liquid Mercury Target During 800-MeV Proton Thermal Shock Tests
Described here are efforts to diagnose transient pressures generated by a short-pulse (about 0.5 microseconds) high intensity proton ({approximately} 2 * 10 14 per pulse) beam. Proton energy is 800-MeV. The tests were performed at the Los Alamos Neutron Science Center - Weapons Neutron Research (LANSCE-WNR). Such capability is required for understanding target interaction for the Spallation Neutron Source project as described previously at this conference.1-4 The main approach to effect the pressure measurements utilized the deflection of a diaphragm in intimate contact with the mercury. There are a wide variety of diaphragm-deflection methods used in scientific and industrial applications. Many deflection-sensing approaches are typically used, including, for instance, capacitive and optical fiber techniques. It was found, however, that conventional pressure measurement using commercial pressure gages with electrical leads was not possible due to the intense nuclear radiation enviro nment. Earlier work with a fiber optic strain gauge demonstrated the viability of using fiber optics for this environment.
Date:
February 1, 2000
Creator:
Allison, S. W.; Andriulli, J. B.; Cates, M. R.; Earl, D. D.; Haines, J. R.; Morrissey, F. X. et al.
Object Type:
Report
System:
The UNT Digital Library
Ecuador’s Brady Bond Default: Background and Implications
None
Date:
February 1, 2000
Creator:
Hornbeck, J. F.
Object Type:
Report
System:
The UNT Digital Library
Electrons in High Magnetic Fields
None
Date:
February 1, 2000
Creator:
Arko, A. J. & Cort, B. S.
Object Type:
Report
System:
The UNT Digital Library
Emergency Planning and Community Right-to-Know Act Section 312 Tier Two report forms
The report contains forms for the chemical description, physical and health hazards, inventory volumes, and storage codes and locations for all hazardous chemicals located at the Y-12 Plant. These can be used by local emergency response teams in case of an accident.
Date:
February 1, 2000
Creator:
Evans, R. A.
Object Type:
Report
System:
The UNT Digital Library
Emergency Planning and Community Right-To-Know Act Section 312 Tier Two report forms
The report contains forms for the chemical description, physical and health hazards, inventory volumes, and storage codes and locations for all hazardous chemicals located at the Y-12 Plant. These can be used by local emergency response teams in case of an accident.
Date:
February 1, 2000
Creator:
Evans, R. A.
Object Type:
Report
System:
The UNT Digital Library
EMSP project summary (Project ID: 60077): Development of nuclear analysis capabilities for DOE waste management activities
The objective of this project is to develop and demonstrate prototypical analysis capabilities that can be used by nuclear safety analysis practitioners to: (1) demonstrate a more thorough understanding of the underlying physics phenomena that can lead to improved reliability and defensibility of safety evaluations; and (2) optimize operations related to the handling, storage, transportation, and disposal of fissile material and DOE spent fuel. To address these problems, this project has been investigating the implementation of sensitivity and uncertainty methods within existing Monte Carlo codes used for criticality safety analyses. It is also investigating the use of a new deterministic code that allows for specification of arbitrary grids to accurately model geometric details required in a criticality safety analysis. This capability can facilitate improved estimations of the required subcritical margin and potentially enable the use of a broader range of experiments in the validation process. The new arbitrary-grid radiation transport code will also enable detailed geometric modeling valuable for improved accuracy in application to a myriad of other problems related to waste characterization. Application to these problems will also be explored.
Date:
February 1, 2000
Creator:
Parks, C. V.; Rearden, B. T.; DeHart, M. D.; Broadhead, B. L.; Hopper, C. M. & Petrie, L. M.
Object Type:
Report
System:
The UNT Digital Library
[Endorsement for Marcus Fellowship Applicant: A Letter of Recommendation]
A well-crafted letter of recommendation endorsing a candidate for the Marcus Fellow Program. This document offers a detailed perspective on the applicant's strengths, accomplishments, and qualities that make them an ideal candidate for this esteemed fellowship.
Date:
February 1, 2000
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
ENGINEERING DEVELOPMENT OF CERAMIC MEMBRANE REACTOR SYSTEM FOR CONVERTING NATURAL GAS TO HYDROGEN AND SYNTHESIS GAS FOR LIQUID TRANSPORTATION FUELS
The objective of this contract is to research, develop and demonstrate a novel ceramic membrane reactor system for the low-cost conversion of natural gas to synthesis gas and hydrogen for liquid transportation fuels: the ITM Syngas process. Through an eight-year, three-phase program, the technology will be developed and scaled up to obtain the technical, engineering, operating and economic data necessary for the final step to full commercialization of the Gas-to-Liquids (GTL) conversion technology. This report is a summary of activities through January 2000.
Date:
February 1, 2000
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Engineering-economic analyses of automotive fuel economy potential in the United States
Over the past 25 years more than 20 major studies have examined the technological potential to improve the fuel economy of passenger cars and light trucks in the US. The majority has used technology/cost analysis, a combination of analytical methods from the disciplines of economics and automotive engineering. In this paper the authors describe the key elements of this methodology, discuss critical issues responsible for the often widely divergent estimates produced by different studies, review the history of its use, and present results from six recent assessments. Whereas early studies tended to confine their scope to the potential of proven technology over a 10-year time period, more recent studies have focused on advanced technologies, raising questions about how best to include the likelihood of technological change. The paper concludes with recommendations for further research.
Date:
February 1, 2000
Creator:
Greene, D. L. & DeCicco, J.
Object Type:
Report
System:
The UNT Digital Library
Engineering research, development and technology FY99
The growth of computer power and connectivity, together with advances in wireless sensing and communication technologies, is transforming the field of complex distributed systems. The ability to deploy large numbers of sensors with a rapid, broadband communication system will enable high-fidelity, near real-time monitoring of complex systems. These technological developments will provide unprecedented insight into the actual performance of engineered and natural environment systems, enable the evolution of many new types of engineered systems for monitoring and detection, and enhance our ability to perform improved and validated large-scale simulations of complex systems. One of the challenges facing engineering is to develop methodologies to exploit the emerging information technologies. Particularly important will be the ability to assimilate measured data into the simulation process in a way which is much more sophisticated than current, primarily ad hoc procedures. The reports contained in this section on the Center for Complex Distributed Systems describe activities related to the integrated engineering of large complex systems. The first three papers describe recent developments for each link of the integrated engineering process for large structural systems. These include (1) the development of model-based signal processing algorithms which will formalize the process of coupling measurements and simulation and …
Date:
February 1, 2000
Creator:
Langland, R T
Object Type:
Report
System:
The UNT Digital Library