Access
Partner
Oklahoma Historical Society
278
UNT Libraries Special Collections
200
UNT Libraries Government Documents Department
38
League City Helen Hall Library
34
Deaf Smith County Library
18
Texas Historical Commission
15
Sterling Municipal Library
11
Carl Albert Congressional Research and Studies Center
9
UNT Libraries
9
Allen Public Library
5
75 More
Collection
Oklahoma Publishing Company Photography Collection
213
KXAS-NBC 5 News Collection
177
Texas Digital Newspaper Program
166
Oklahoma Digital Newspaper Program
79
Tocker Foundation Grant
79
Texas History Collection
34
Office of Scientific & Technical Information Technical Reports
24
THC National Register Collection
15
Chickasha Newspaper Collection
13
Ladd & Katherine Hancher Library Foundation
13
120 More
Country
Year
Month
Day
Language
768 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
768
next
Analytical model for the dynamic resistivity of electrically-exploded conductors
A detailed model for the dynamic resistivity of an exploding conductor presents many difficulties. An electrically-exploded conductor undergoes significant hydrodynamic expansion as it is heated. Resistivity is a function of both the temperature and density of a conductor and realistic models for resistivity over the range of parameter space experienced by an exploding conductor are quite complex. See for example, the model of Lee and More (1984). Calculation of the hydrodynamic expansion of the conductor during and subsequent to the explosion is likewise dependent on detailed knowledge of the equation of state for the conductor in a range where few experimental data exist. A further complication is the strong magnetic field which couples the hydrodynamic expansion to the currents flowing in the expanding material. In spite of the difficulties, progress is being made on detailed modeling of fuses and exploding conductors (Lidemuth and co-workers, 1985). A simpler approach has proved to be quite useful for modeling the electrical behavior of exploding bridgewire and slapper detonators and for modeling the explosionss of large conductors exploded with large capacitor banks. In the work described here, a simple, empirical model was developed which can be expressed as a closed-form algebraic expression involving four …
Date:
October 10, 1986
Creator:
Lee, R. S.
Object Type:
Article
System:
The UNT Digital Library
Radiation in the SLC final focus alcoves from beam losses in collimators and dumps
Radiation levels inside the final focus alcoves are calculated from the main dump, tune-up dumps, and adjustable collimators. Neutron calculations are done for giant resonance neutrons. Fluences of neutrons and photons in the alcoves are determined. It is concluded that, if the beam losses do indeed occur as believed, many of the electronic components in the alcoves will begin to fail after a very short running period. (LEW)
Date:
September 10, 1986
Creator:
Jenkins, T.M. & McCall, R.C.
Object Type:
Report
System:
The UNT Digital Library
Scaling of current density, total current, emittance, and brightness for hydrogen negative ion sources
The atomic and molecular processes that play a principal role in negative ion formation in a hydrogen negative ion discharge are discussed. The collisions of energetic electrons with gas molecules within the discharge lead to vibrationally excited molecules. Thermal electrons in turn attach to these excited molecules and generate negative ions via the dissociative attachment process. A system geometry chosen to optimize these collision processes is discussed that consists of a high-power discharge in tandem with a low electron temperature bath, the two regions separated by a magnetic filter. The current density extracted from such a system is found to scale inversely with the system scale length provided the gas density and electron density are also increased inversely with scale length. If a system is scaled downward in size to provide a new beamlet but one with increased current density, and these beamlets are packed to fill the original dimension, the new total extracted current will exceed the original total current by the scale factor. The emittance, epsilon, of the new system remains unchanged. The brightness, J/epsilon/sup 2/, of the new system will also be increased in proportion to the scale factor. 4 refs., 2 figs.
Date:
July 10, 1986
Creator:
Hiskes, J.R.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0071.0670]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "89er Dave Owen steals second base ahead of the tag by Royal second baseman Mike Miller."
Date:
April 10, 1986
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0108.0265]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
January 10, 1986
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0140.0550]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Sam Ray Compton Jr. carves out pieces of a violin."
Date:
October 10, 1986
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0342]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Pitcher Glen Cook started for the Oklahoma City 89ers Thursday night, but lasted only three innings."
Date:
July 10, 1986
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0153.0642]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Marianna Davenport, OCU theater director."
Date:
September 10, 1986
Creator:
Howell, Paul S.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0096]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
February 10, 1986
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0140.0297]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Coach Bog Colon shouts instructions during a recent Oklahoma City University women's basketball game."
Date:
February 10, 1986
Creator:
Gooch, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0285]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "David Woodworth talks with Ed Cook of the Oklahoma City Chamber of Commerce about traveling."
Date:
July 10, 1986
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0338.0962]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Robert S. Kerr lll, a 35-year-old Oklahoma city businessman and the grandson of a longtime Oklahoma politician, easily won the Democratic nomination for Lt. Gov. Tuesday over feisty former legislator Cleta Deatherage Mitchell, who had asked Kerr to work for her campaign before he announced as a candidate."
Date:
August 10, 1986
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0338.0969]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Robert S. Kerr lll - Dem. Cand. for Lt. Gov. (Okla.)"
Date:
August 10, 1986
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Infrared and Raman investigation of rare-earth phosphate glasses for potential use as radioactive waste forms
This project was designed to investigate the properties of the rare-earth phosphate glasses CeO{sub 2}-P{sub 2}O{sub 5} and Pr{sub 2}O{sub 3}-P{sub 2}O{sub 5} for potential use as radioactive waste glasses. The research involved determination of the glass-forming region, loading capacity, and optimum processing parameters of the glasses. Structural studies of the unloaded host glasses and glasses loaded with simulated waste elements were to be done using Raman, infrared and infrared reflection spectroscopy. Leach testing and spectroscopic studies of the corroded surfaces were also to be performed.
Date:
November 10, 1986
Creator:
Morgan, S.
Object Type:
Report
System:
The UNT Digital Library
Giant resonance phenomena in the electron impact ionization of heavy atoms and ions
Heavy atoms and ions offer an interesting opportunity to study atomic physics in a region where the atomic structure is dominated by the interelectronic interactions. One illustration of this is the profound term dependence of atomic orbitals for certain configurations of heavy atoms and ions. The appearance of giant scattering resonances in the cross sections for ionization of heavy atoms by electron impact is a manifestation of resonance behavior. Such resonant structures arise from the double well nature of the scattering potential and have recently been identified in the cross sections for the electron impact ionization of several xenon-like ions. The results of calculations showing effects for a variety of other ions are summarized. 7 refs., 4 figs.
Date:
June 10, 1986
Creator:
Younger, S.M.
Object Type:
Article
System:
The UNT Digital Library
Use of single-cutter data in the analysis of PDC bit designs
A method is developed for predicting cutter forces, temperatures, and wear on PDC bits as well as integrated bit performance parameters such as weight-on-bit (WOB), drilling torque, and bit imbalance. A computer code called PDCWEAR has been developed to make this method available as a tool for general bit design. The method uses single-cutter data to provide a measure of rock drillability and employs theoretical considerations to account for interaction among closely spaced cutters on the bit. Experimental data are presented to establish the effects of cutter size and wearflat area on the forces that develop during rock cutting. Waterjet assistance is shown to significantly reduce cutting forces, thereby extending bit life and reducing WOB and torque requirements in hard rock. The effects of bit profile, cutter placement density, bit rotary speed, and wear mode on bit life and drilling performance are investigated. 21 refs., 34 figs., 4 tabs.
Date:
October 10, 1986
Creator:
Glowka, D.A.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0259.0446]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "A workman toils on "falsework" constructed from hardwood beams this week north of NW 23 and Broadway."
Date:
April 10, 1986
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0264.0812]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Technician Tom Balain of Oklahoma Memorial Hospital runs an EEG on epilepsy patient Hoyt Brewer."
Date:
April 10, 1986
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0257.0116]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
January 10, 1986
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0268.0015]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Gladys Goldberg, left, and Shirley Howard admire table decorations at the recent meeting of the Women's Dinner Club at the Oklahoma Conference Center."
Date:
May 10, 1986
Creator:
Wilson, George R.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0224.0749]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
November 10, 1986
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0253.0102]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Matt Hirsch, 2, helps grandparents Jim and Maxine Hawley decide which iris to enter in the iris show."
Date:
April 10, 1986
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0266.0434]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Bruce Hoster with his game , Brain Bogglers."
Date:
December 10, 1986
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0266.0433]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Brice Hoster - Develops Game , Brain Bogglers"
Date:
December 10, 1986
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History