Access
Partner
UNT Libraries Government Documents Department
6,394
UT San Antonio Libraries Special Collections
145
UNT Libraries Special Collections
59
Oklahoma Historical Society
55
Sterling Municipal Library
11
Oklahoma State Firefighters Museum
10
Abilene Christian University Library
9
UNT Libraries
8
UNT College of Arts and Sciences
5
Comanche Public Library
4
60 More
Collection
Office of Scientific & Technical Information Technical Reports
6,366
Texas Cultures Online
145
Institute of Texan Cultures Texas Folklife Festival Collection
143
Texas Digital Newspaper Program
127
Oklahoma Digital Newspaper Program
70
Tocker Foundation Grant
63
KXAS-NBC 5 News Collection
42
Texas State Publications
16
Chickasha Newspaper Collection
12
The Gayly Oklahoman
10
96 More
Degree Department
Country
States
Decade
Month
Day
Language
6,807 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
6,807
next
1: Mass asymmetric fission barriers for {sup 98}Mo; 2: Synthesis and characterization of actinide-specific chelating agents
Excitation functions have been measured for complex fragment emission from the compound nucleus {sup 98}Mo, produced by the reaction of {sup 86}Kr with {sup 12}C. Mass asymmetric fission barriers have been obtained by fitting the excitation functions with a transition state formalism. The extracted barriers are {approximately} 5.7 MeV higher, on average, than the calculations of the Rotating Finite Range Model (RFRM). These data clearly show an isospin dependence of the conditional barriers when compared with the extracted barriers from {sup 90}Mo and {sup 94}Mo. Eleven different liquid/liquid extractants were synthesized based upon the chelating moieties 3,2-HOPO and 3,4-HOPO; additionally, two liquid/liquid extractants based upon the 1,2-HOPO chelating moiety were obtained for extraction studies. The Pu(IV) extractions, quite surprisingly, yielded results that were very different from the Fe(III) extractions. The first trend remained the same: the 1,2-HOPOs were the best extractants, followed closely by the 3,2-HOPOs, followed by the 3,4-HOPOs; but in these Pu(IV) extractions the 3,4-HOPOs performed much better than in the Fe(III) extractions. 129 refs.
Date:
August 1, 1996
Creator:
Veeck, A. C.
Object Type:
Report
System:
The UNT Digital Library
N = 2 string amplitudes
In physics, solvable models have played very important roles. Understanding a simple model in detail teaches us a lot about more complicated models in generic situations. Five years ago, C. Vafa and I found that the closed N = 2 string theory, that is a string theory with the N = 2 local supersymmetry on the worldsheet, is classically equivalent to the self-dual Einstein gravity in four spacetime dimensions. Thus this string theory is solvable at the classical level. More recently, we have examined the N = 2 string partition function for spacial compactifications, and computed it to all order in the string perturbation expansion. The fact that such computation is possible at all suggests that the N = 2 string theory is solvable even quantum mechanically.
Date:
August 1, 1995
Creator:
Ooguri, H.
Object Type:
Article
System:
The UNT Digital Library
A 6.7 MeV cw RFQ linac
A 6.7-MeV 350 MHz, cw Radio Frequency Quadrupole proton linac has been designed and is being fabricated for the Accelerator Production of Tritium Project at Los Alamos. This eight-meter long structure consists of four resonantly-coupled segments and is being fabricated using hydrogen furnace brazing as a joining technology. Details of the design and status of fabrication are reported.
Date:
August 1, 1997
Creator:
Schrage, D.; Young, L.; Clark, W.; Davis, T.; Martinez, F.; Naranjo, A. et al.
Object Type:
Article
System:
The UNT Digital Library
10{times} reduction imaging at 13.4nm
A Schwarzschild imaging system has been designed to achieve 0.1 {mu}m resolution in a 0.4 mm diameter field of view when operated at a center wavelength of 13.4 nm. A decentered aperture is located on the convex primary resulting in an unobstructed numerical aperture of 0.08 and a corresponding depth of field of {plus_minus} 1 {mu}m. The Schwarzschild imaging objective is part of a five-reflection system containing the laser plasma source (LPS), condensing optics, turning mirror and reflection mask as shown in Figure 1. Extreme ultraviolet (EUV) radiation is generated by impinging a laser beam onto a copper target. The plasma source is driven by a Lambda Physik PLX 250 KrF excimer laser emitting 0.6 Joule, 20 ns pulses at a 200 Hz maximum repetition rate. Measurements of the source indicate that the full-width-half-maximum diameter is less than 100 {mu}m.
Date:
August 1, 1994
Creator:
Tichenor, D. A.; Kubiak, G. D. & Malinowski, M. E.
Object Type:
Article
System:
The UNT Digital Library
The 12-GeV/c beam transfer and absorber lines for the Superconducting Super Collider
The beam optics of the 12-GeV/c proton beam transfer line between the Low Energy Booster (LEB) and the Medium Energy Booster (MEB) at the Superconducting Super Collider is presented. The beam is extracted from the LEB vertically and is injected into the MEB through a vertical Lambertson magnet and a horizontal kicker. The beamline has high flexibility for amplitude and dispersion function matching. Effects of various errors in the transfer line are studied, and a beam position correction scheme is proposed. The beam optics of the 12-GeV/c absorber line transporting the beam from the LEB to an absorber during the LEB commissioning is also presented.
Date:
August 1, 1994
Creator:
Mao, N.; McGill, J.; Gerig, R. & Brown, K.
Object Type:
Report
System:
The UNT Digital Library
A 20 ampere shunt regulator for controlling individual magnets in a seriesed string
At the CEBAF accelerator, groups of dipole magnets are often connected together in series and powered from a single large constant-current regulated D-C supply, referred to locally as a {open_quotes}box{close_quotes} supply. Besides the economy realized, this configuration promotes correct field tracking of all elements of a beam transport channel. However, it is often desirable to vary the current in one element of a string independently of the others, particularly at the entrance and exits of transport channels. A 20 ampere programmable current shunt is described. Installed in parallel with the desired magnet, it permits shunting (bypassing) up to 5% of the string current around that magnet. The shunt regulator consists of a bank of MOSFET power transistors operated in linear mode. Regulation of current through the passbank is obtained by feedback from a manganin shunt maintained at a constant temperature for stability. The module is designed for remote operation and provides readbacks of various parameters useful for maintenance. To achieve complete electrical isolation, an onboard microprocessor provides remote communications via an opto-isolated serial data link. Constructional details and initial operating experience with the plug-in shunt are described.
Date:
August 1, 1996
Creator:
Martin, E. J.; Dobeck, N.; Jones, G. S. & O`Sullivan, M. K.
Object Type:
Article
System:
The UNT Digital Library
24 M Meteorological Tower Data Report Period: January--December, 1994
This report was prepared by the Desert Research Institute (DRI) for the U.S. Department of Energy (DOE). It summarizes meteorological data collected at the 24 meter tower at the Nevada Test Site Hazardous Material Spill Center (HAZMAT) located at Frenchman Flat near Mercury, Nevada, approximately 75 miles northwest of Las Vegas, Nevada. The tower was originally installed in July, 1993 to characterize baseline conditions for an EPA sponsored experimental research program at the HAZMAT.
Date:
August 1, 1997
Creator:
Freeman, D.; Bowen, J. & Egami, R.
Object Type:
Report
System:
The UNT Digital Library
25. anniversary of the 1973 oil embargo: Energy trends since the first major U.S. energy crisis
The purpose of this publication is not to assess the causes of the 1973 energy crisis or the measures that were adopted to resolve it. The intent is to present some data on which such analyses can be based. Many of the trends presented here fall into two distinct periods. From 1973 to the mid-1980`s, prices continued at very high levels, in part because of a second oil shock in 1979--80. During this period, rapid progress was made in raising American oil production, reducing dependence on oil imports, and improving end-use efficiency. After the oil price collapse of the mid-1980`s, however, prices retreated to more moderate levels, the pace of efficiency gains slowed, American oil production fell, and the share of imports rose. 30 figs.
Date:
August 1, 1998
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
A 50 mm bore superconducting dipole with a unique iron yoke structure
A 50 mm bore superconducting dipole with a thin stainless steel collar and a close in elliptical iron yoke was designed in order to obtain a high transfer function SW low saturation effects on the multipoles, and a one meter model was built and tested. Training behavior of the first 1 m model, called D19, is presented at 4.3 K and 1.8 K. At 1.8 K it reached the record field of 10.06 T. The two layer cos [theta] winding uses 30 and 36 strand cables identical to the cables of the 50 mm bore SSC dipole and it has an operating field of 6.6 T at 4.35 K with a current of 5800 A. To evaluate behavior at high fields, the mechanical structure for the model was designed for 10 T. The thin collar itself provides only a minimum prestress of 10 MPa. and the full prestress of 70 MPa is given by the iron yoke. An aluminum spacer is used to control the gap size in the vertically split iron yoke. The tapered gap in the yoke is determined by the size of the Al spacer so that during cooldown there is no loss of coil prestress and …
Date:
August 1, 1992
Creator:
Dell'Orco, D.; Caspi, S.; O'Neill, J.; Lietzke, A.; Scanlan, R.; Taylor, C. E. et al.
Object Type:
Article
System:
The UNT Digital Library
A 50 mm bore superconducting dipole with a unique iron yoke structure
A 50 mm bore superconducting dipole with a thin stainless steel collar and a close in elliptical iron yoke was designed in order to obtain a high transfer function SW low saturation effects on the multipoles, and a one meter model was built and tested. Training behavior of the first 1 m model, called D19, is presented at 4.3 K and 1.8 K. At 1.8 K it reached the record field of 10.06 T. The two layer cos {theta} winding uses 30 and 36 strand cables identical to the cables of the 50 mm bore SSC dipole and it has an operating field of 6.6 T at 4.35 K with a current of 5800 A. To evaluate behavior at high fields, the mechanical structure for the model was designed for 10 T. The thin collar itself provides only a minimum prestress of 10 MPa. and the full prestress of 70 MPa is given by the iron yoke. An aluminum spacer is used to control the gap size in the vertically split iron yoke. The tapered gap in the yoke is determined by the size of the Al spacer so that during cooldown there is no loss of coil prestress and …
Date:
August 1, 1992
Creator:
Dell`Orco, D.; Caspi, S.; O`Neill, J.; Lietzke, A.; Scanlan, R.; Taylor, C. E. et al.
Object Type:
Article
System:
The UNT Digital Library
94-1 Research and development project lead laboratory support. Status report, January 1--March 31, 1997
This status report is published for Los Alamos National Laboratory 94-1 Research and Development Project Support. The Department of Energy Office of Environmental Management funds these projects in order to support the storage or disposal of legacy plutonium and plutonium-bearing materials that resulted from weapons production throughout the DOE complex. This report summarizes status and technical progress for Los Alamos 94-1 projects during the second quarter of fiscal year 1997.
Date:
August 1, 1997
Creator:
Rink, N.A.
Object Type:
Report
System:
The UNT Digital Library
100 Area Excavation Treatability Test Plan. Revision 1
This test plan documents the requirements for a treatability study on field radionuclide analysis and dust control techniques. These systems will be used during remedial actions involving excavation. The data from this treatability study will be used to support the feasibility study (FS) process. Excavation is one of the high-priority, near-term, treatability study needs identified in the program plan (DOE-RL 1992f). Excavation of contaminated soils and buried solid wastes is included in several of the alternatives identified in the 100 Area FS. Although a common activity, excavation has only been used occasionally at the Hanford Site for waste removal applications. The most recent applications are excavation of the 618-9 burial ground and partial remediation of the 316-5 process trenches (DOE-RL 1992a, 1992b). Both projects included excavation of soil and dust control (using water sprays). Excavation is a well-developed technology and equipment is readily available; however, certain aspects of the excavation process require testing before use in full-scale operations. These include the following: Measurement and control of excavation-generated dust and airborne contamination; verification of field analytical system capabilities; demonstration of soil removal techniques specific to the 100 Area waste site types and configurations. The execution of this treatability test may produce …
Date:
August 1, 1993
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
100 Hour Test of the Pressurized Woodchip-Fired Gravel Bed Combustor
Combustion of wood chips in a packed bed combustor for a gas turbine cogeneration system is described. A discussion on flue gas emissions and mass balances is included.
Date:
August 1, 1994
Creator:
Ragland, Kenneth W. & Aerts, Danny J.
Object Type:
Report
System:
The UNT Digital Library
100-N Area underground storage tank closures
This report describes the removal/characterization actions concerning underground storage tanks (UST) at the 100-N Area. Included are 105-N-LFT, 182-N-1-DT, 182-N-2-DT, 182-N-3-DT, 100-N-SS-27, and 100-N-SS-28. The text of this report gives a summary of remedial activities. In addition, correspondence relating to UST closures can be found in Appendix B. Appendix C contains copies of Unusual Occurrence Reports, and validated sampling data results comprise Appendix D.
Date:
August 1, 1993
Creator:
Rowley, C. A.
Object Type:
Report
System:
The UNT Digital Library
118-B-1 excavation treatability test procedures
This treatability study has two purposes: to support development of the approach to be used for burial ground remediation, and to provide specific engineering information for the design of burial grounds receiving waste generated from the 100 Area removal actions. Data generated from this test will also provide performance and cost information necessary for detailed analysis of alternatives for burial ground remediation. Further details on the test requirements, milestones and data quality objectives are described in detail in the 118-B-1 Excavation Treatability Test Plan (DOE/RL-94-43). These working procedures are intended for use by field personnel to implement the requirements of the milestone. A copy of the detailed Test Plan will be kept on file at the on-site field support trailer, and will be available for review by field personnel.
Date:
August 1, 1994
Creator:
Frain, J. M.
Object Type:
Report
System:
The UNT Digital Library
308 Building zone I stabilization and confinement
The 308 Building located on the Hanford Site near Richland, Washington, is currently in transition to shutdown status. After this transition is complete, the facility will be maintained/surveilled and given to the U.S. Department of Energy Office of Facility Transition and Management (EM-60) for utilization, remedial action, or decontamination and decommissioning (D&D). This may require that the facility be maintained in the shutdown status for as long as 30 yrs. To date, all of the special nuclear material (SNM) has been removed, potential fuel supply equipment preserved, surplus materials and equipment excessed, and enclosure cleanup and stabilization completed. A major activity in support of the 308 Building shutdown was the cleanup and stabilization of the enclosures and surface contamination areas. This document discusses the specific designs, processes, and methods used to stabilize and confine the radiological material within the enclosure and exhaust ducts to allow the shutdown of the active support systems. The process and designs employed were effective, yet simple, and maximized the use of current technologies and commercial products.
Date:
August 1, 1994
Creator:
Metcalf, I. L.; Schwartz, K. E.; Rich, J. W.; Benecke, M. W. & Lanham, G. W.
Object Type:
Article
System:
The UNT Digital Library
340 waste handling facility deactivation plan
This document provides an overview of both the present status of the 340 Complex (within Hanford`s 300 Area), and of tasks associated with the deactivation of those segments dealing with radioactive, mixed liquid waste receipt, storage, and shipping.The plan also outlines actions needed to de-couple portions of the 340 Complex that will remain in service, including a replacement facility for required functions now fulfilled by systems proposed for deactivation. Task descriptions are presented, along with a detailed schedule for fiscal years 1997 through 2001, a companion preliminary budget (focused more on the near term), and a list of key assumptions.
Date:
August 1, 1996
Creator:
Stordeur, R.T. & Berneski, L.D., Westinghouse Hanford
Object Type:
Report
System:
The UNT Digital Library
A 500 kV Photoemission Electron Gun for the CEBAF FEL
The proposed FELs at CEBAF require an electron source delivering 120 pC bunches at a repetition rate of 7.485 MHz, corresponding to an average current of 0.9 mA. To meet this requirement we will employ a 500 kV DC photoemission electron gun to produce nominal 100 psec bunches of modest peak current. The subsequent injector system will bunch and accelerate this beam, producing 60 A, 2 psec bunches for the FELs. The photoemission gun will use a negative electron affinity GaAs photocathode, which provides good quantum efficiency and an adequate temporal response. The optical beam will be provided by a frequency doubled Nd:YLF laser system, actively mode locked to a subharmonic of the fundamental accelerator frequency. The principal technical difficulties associated with an electron source of this type involve the operating lifetime of the photocathode, and the operation of a high voltage gun in the presence of the alkali metals necessary to produce the photocathode. Various design a
Date:
August 1, 1991
Creator:
Sinclair, Charles
Object Type:
Report
System:
The UNT Digital Library
1400 Liter 1.8K Test Facility
A double bath superfluid helium dewar has been constructed and operated at Fermilab`s Magnet Test Facility. The 1.8 K portion of the dewar is sized to contain a superconducting magnet up to 0.5 meters in diameter and 4 meters long in a vertical orientation in 0.12 MPa pressurized superfluid. The dewar can also provide a subcooled Helium I environment for tests; the entire temperature range from 4.4 K to 1. 8 K at 0.12 MPa is available. This paper describes the system design, lambda plate, heat exchanger, and performance.
Date:
August 1, 1997
Creator:
Peterson, T. J.; Rabehl, R. J. & Sylvester, C. D.
Object Type:
Article
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 25, No. 34, Ed. 1 Thursday, August 1, 1996
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
August 1, 1996
Creator:
Slayton, Marni
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
1990 yearly calibration of Pacific Northwest Laboratory's gross-gamma borehole geophysical logging system
This report describes the 1990 yearly calibration of a gross-gamma geophysical pulse logging system owned by the US Department of Energy (DOE) and operated by Pacific Northwest Laboratory (PNL). The calibration was conducted to permit the continued use of this system for geological and hydrologic studies associated with remedial investigation at the Hanford Site. Primary calibrations to equivalent uranium units were conducted in borehole model standards that were recently moved to the Hanford Site from the DOE field calibration facility in Spokane, Washington. The calibrations were performed in borehole models SBL/SBH and SBA/SBB, which contain low equivalent-uranium concentrations. The integrity of the system throughout the previous year from gamma-ray monitoring was demonstrated using the before- and after-logging field calibration readings with the field source in calibration Positions 1 and 2. Most of the Position 1 readings are within an 8% limit that is set by the governing PNL technical reference procedure as a critical value above which the instrument is considered suspect. Many of the Position 2 readings exceed the 8% limit; however, the fluctuation was traced to field-source geometry variability that affected Position 1 count rates by up to 6% and Position 2 count rates by as much as …
Date:
August 1, 1990
Creator:
Arthur, R.J.
Object Type:
Report
System:
The UNT Digital Library
1991 Yearly calibration of Pacific Northwest Laboratory's gross gamma-ray borehole geophysical logging system
This report describes the 1991 yearly calibration of a gross gamma-ray geophysical pulse logging system owned by the US Department of Energy (DOE) and operated by the Pacific Northwest Laboratory. The calibration was conducted to permit the continued use of this system for geologic and hydrologic studies associated with remedial investigations at the Hanford Site. Primary calibrations to equivalent uranium units were conducted in DOE borehole model standards that reside on the Hanford Site. The calibrations were performed in borehole models SBL/SBH and SBA/SBB, which contain low-equivalent uranium concentrations. Correlations were established based on two similar approaches for relating observed count rate in before- and after-logging field calibrations to equivalent uranium concentrations. A new field source (Ra-20S-82) was fabricated to replace the old source (Ra-20S-204), whose activity led to variable field calibration results previously caused by a nonfixed geometry. A cross-calibration study was performed to compare the operation of the new source relative to the old source. A digitally based collection/recording system was recently acquired, so that many of the procedures were performed with the old analog system and the new digital system to compare the performance of the digital system. 7 refs., 2 figs., 9 tabs.
Date:
August 1, 1991
Creator:
Arthur, R.J.
Object Type:
Report
System:
The UNT Digital Library
The 1992 Pacific Northwest Residential Energy Survey: Phase 1 : Book 1 : Getting Started.
This Executive Summary outlines the general processes employed in and the major findings from the conduct of Phase I of the Pacific Northwest Residential Energy Survey (PNWRES92-I) during the last quarter of 1992. This study was Bonneville`s third comprehensive residential survey of the region, conducted to provide data on energy usage, conservation awareness and behaviors, and associated consumer characteristics for use in forecasting and planning. The summary is divided into four sections: Background sets the stage with respect to the need for the survey, relates it to previous work, outlines the implementation processes, and summarizes the data products. Profiling the respondents summarizes the survey results under these six categories: Demographics; Housing Units; Room Inventory; Appliance Inventory; Air-Conditioning/Heating; Water-Heating; and Opinion. Reports and cross-tabulations describes the various individual documents. Bonneville Power Plus provides a short description of an Excel-spreadsheet-based software program that contains all of the tabulated material in a format that encourages browsing among the tables and charts, with special feature that they can be copied directly into other Windows-based documents.
Date:
August 1, 1993
Creator:
Applied Management & Planning Group
Object Type:
Report
System:
The UNT Digital Library
The 1992 Pacific Northwest Residential Energy Survey - Phase 1. Book 2: Item-by-Item Crosstabulations, Volume C: Pacific Northwest Region
This book constitutes a portion of the primary documentation for the 1992 Pacific Northwest Residential Energy Survey, Phase I. The complete 33-volume set of primary documentation provides information needed by energy analysts and interpreters with respect to planning, execution, data collection, and data management of the PNWRES92-I process. Thirty of these volumes are devoted to different ``views`` of the data themselves, with each view having a special purpose or interest as its focus. Analyses and interpretations of these data will be the subjects of forthcoming publications. Conducted during the late summer and fall months of 1992, PNWRES92-I had the over-arching goal of satisfying basic requirements for a variety of information about the stock of residential units in Bonneville`s service region. Surveys with a similar goal were conducted in 1979 and 1983. This volume discerns the information by region. ``Selected crosstabulations`` refers to a set of nine survey items of wide interest (Dwelling Type, Ownership Type, Year-of-Construction, Dwelling Size, Primary Space-Heating Fuel, Primary Water-Heating Fuel, Household Income for 1991, Utility Type, and Space-Heating Fuels: Systems and Equipment) that were crosstabulated among themselves.
Date:
August 1, 1993
Creator:
United States. Bonneville Power Administration. End-Use Research Section.
Object Type:
Report
System:
The UNT Digital Library