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464
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464
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285
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196
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28
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24
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24
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21
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20
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404
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361
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329
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196
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195
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159
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150
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59
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44
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Establishment and maintenance of a coal sample bank and data base
Data from both instruments indicate that atmospheric oxygen is leaking into the primary and secondary containers. The methods and containers tested cannot maintain an inert atmosphere over the long term. The actual percentage of oxygen in the containers is thought to be influenced by several factors: (1) Flushing with argon by any method only displaces part (50 to 80%) of the atmospheric air present in the container after it is filled with coal. Because the atmosphere may not be homogeneous, and because leakage may be a factor before diffusion makes it homogeneous, this fraction is difficult to determine by sampling and analysis. (2) The amount of air displaced depends upon the argon introduction method used and its duration. Methods which allow time for diffusion of air to an exit before argon introduction ends appear to be most effective. (3) After sealing the containers, oxygen in the container is consumed by the coal; the amount and rate of consumption are thought to be a function of coal rank. (4) Leakage of air into the container may replace some or all of the oxygen consumed by the coal. (5) Full containers generally exhibit lower head space oxygen contents. (6) The lid seals …
Date:
February 1, 1989
Creator:
Davis, A.
Object Type:
Report
System:
The UNT Digital Library
Influence of extrinsic crack deflection and delamination mechanisms on the cryogenic toughness of aluminum-lithium alloy 2090: Behavior in plate (T81) vs sheet (T83) material
Cryogenic strength-toughness relationships are examined in 1.6-mm- thick sheet of commercial 2090-T8 aluminum-lithium alloy, and results compared with behavior in 12.7-mm-thick rolled plate. Unlike the significant increase in L-T fracture toughness exhibited by thick place sections at cryogenic temperatures, the thin sheet (of normally similar composition and microstructure) shows a marked decrease in toughness between 298 and 77 K. Such contrasting observations are attributed primarily to the low short-transverse toughness of the 2090-plate material, which results in enhanced through-thickness intergranular splitting during low-temperature fracture and hence to a prominent role of crack-divider delamination toughening. 23 refs., 6 figs., 1 tab.
Date:
February 1, 1989
Creator:
Venkateswara Rao, K. T. & Ritchie, R. O.
Object Type:
Article
System:
The UNT Digital Library
An alternate end design for SSC dipoles
Experience in the SSC dipole program has shown that fabrication of cylindrical coil ends is difficult. Cable stiffness requires large forces to maintain the proper position of the conductors in the end during winding. After winding, the coil ends remain distorted nd significant motion of the need conductors is required to force the coil end into the molding cavity. Local mechanical stresses are high during this process and extra pieces of insulation are required to prevent turn-to-turn shorts from developing during the winding and molding steps. Prior to assembly the coil end is compressed in a mold cavity and injected with a filler material to correct surface irregularities and fill voids in the end. LBL has developed an alternate design which permits the conductors to be wound over the end using minimal force and technician coerosion. The conductors are placed on a conical surface where the largest diameter over the outer layer conductors is 10 cm. No coil end spaces or insulation pieces between turns are required. The conductor geometry was analytically optimized to meet SSC multipole requirements for the ends. The first 1-m dipole utilizing this end geometry has been constructed and successfully tested. Design and construction data are …
Date:
February 1, 1989
Creator:
Peters, C.; Caspi, S. & Taylor, C.
Object Type:
Article
System:
The UNT Digital Library
Guest Artist Recital: 1989-02-02 - David Pino, clarinet, and Mark Dal Porto, piano
Access:
Use of this item is restricted to the UNT Community
Guest artist recital performed at the UNT College of Music Recital Hall.
Date:
February 2, 1989
Creator:
Pino, David & Dal Porto, Mark
Object Type:
Sound
System:
The UNT Digital Library
Faculty Recital: 1989-02-05 - Harold Heiberg, piano, with the UNT Voice Faculty
A faculty and guest artist recital performed at the UNT College of Music Recital Hall.
Date:
February 5, 1989
Creator:
Heiberg, Harold
Object Type:
Sound
System:
The UNT Digital Library
Guest Artist Recital: 1989-02-06 - Minoru Nojima, piano
Access:
Use of this item is restricted to the UNT Community
A guest artist recital performed at the UNT College of Music Concert Hall.
Date:
February 6, 1989
Creator:
Nojima, Minoru
Object Type:
Sound
System:
The UNT Digital Library
Guest Artist Recital: 1989-02-09 - Adam Holzman, classical guitar
Access:
Use of this item is restricted to the UNT Community
A guest artist recital performed at the UNT College of Music Recital Hall.
Date:
February 9, 1989
Creator:
Holzman, Adam
Object Type:
Sound
System:
The UNT Digital Library
Faculty Recital: 1989-02-19 - Lewis Dean Gillis Memorial Concert
Access:
Use of this item is restricted to the UNT Community
A memorial concert performed at the UNT College of Music Concert Hall.
Date:
February 19, 1989
Creator:
UNT College of Music
Object Type:
Sound
System:
The UNT Digital Library
Guest Artist Recital: 1989-02-26 - Motoi Takeda, violin, Yuri Anshelevich, cello, and Adam Wodnicki, piano
Access:
Use of this item is restricted to the UNT Community
A faculty and guest artist recital performed at the UNT College of Music Recital Hall.
Date:
February 26, 1989
Creator:
Takeda, Motoi; Anshelevich, Yuri & Wodnicki, Adam
Object Type:
Sound
System:
The UNT Digital Library
[Photograph 2012.201.B0119.0013]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Jeanne Dear, Peggy and Mick Duncan, Margaret Bush and Kim Joseph, from left, visit at the cocktail buffet."
Date:
February 8, 1989
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0120.0285]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "The U.S. Marshals Service is celebrating its bicentennial this year and a traveling exhibit, sponsored by the Marshals Service and the Smithsonian Institution Traveling Exhibition Service, will be on display April 8 to May 15 at the National Cowboy Hall of Fame in Oklahoma City."
Date:
February 14, 1989
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0093.0645]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "OU's Mookie Blaylock applies the pressure to lee Coward of Missouri in Thursday's Big Eight showdown."
Date:
February 9, 1989
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Letter from Rogers Redding to Academic Deans and Department Chairs, February 20, 1989]
Letter from Rogers Redding to the deans and department chairs of the Texas Academy of Mathematics and Science, on February 20, 1989, announcing that Dr. Manus Donahue is the new associate director for academic programs for the Academy.
Date:
February 20, 1989
Creator:
Redding, Rogers W.
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Donald M. Stewart, February 8, 1989]
Letter from Donald M. Stewart on February 8, 1989, explaining a recent decision of the United States District Court with regard to the use of the SAT by itself in awarding New York State Regents Scholarships.
Date:
February 8, 1989
Creator:
Stewart, Donald M.
Object Type:
Letter
System:
The UNT Digital Library
[Memorandum from Jim Miller to Rogers Redding, February 2, 1989]
Memo from Jim Miller to Rogers Redding, on February 2, 1989, sending him a letter from Julian C. Stanley and Ann Lupkowski, who offer suggestions for a Study of Mathematically Precocious Youths at the University of North Texas.
Date:
February 2, 1989
Creator:
Miller, James R.
Object Type:
Letter
System:
The UNT Digital Library
U.S. Students Flunk Math, Science
Article discussing the poor ranking of American teenagers in a study of proficiency in math and science, including students from the United States, the United Kingdom, Spain, Ireland, Korea, and four provinces of Canada.
Date:
February 10, 1989
Creator:
Byrne, Gregory
Object Type:
Clipping
System:
The UNT Digital Library
[Photograph 2012.201.B0151.0358]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Mr. and Mrs. Harley Custer, left, are greeted by Mr. and Mrs. George Craig."
Date:
February 4, 1989
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0149.0459]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
February 18, 1989
Creator:
Hellstern, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0152.0706]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Oklahoma State's Steve Dailey, who hadn't hit a home run since opening day two months ago, smacked three Saturday afternoon to lead the Cowboys to a 13-6 victory over Nebraska at Reynolds Stadium."
Date:
February 17, 1989
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0334.0100]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
February 17, 1989
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Optical data transmission at the superconducting super collider
Digital and analog data transmissions via fiber optics for the Superconducting Super Collider have been investigated. The state of the art of optical transmitters, low loss fiber waveguides, receivers and associated electronics components are reviewed and summarized. Emphasis is placed on the effects of the radiation environment on the performance of an optical data transmission system components. Also, the performance of candidate components of the wide band digital and analog transmission systems intended for deployment of the Superconducting Super Collider Detector is discussed. 27 refs., 15 figs.
Date:
February 1, 1989
Creator:
Leskovar, B.
Object Type:
Article
System:
The UNT Digital Library
[Letter from Clovis Morrisson to Jack Davis, February 17, 1989]
Photocopy of a letter from Clovis Morrisson, Office of Advancement to Jack Davis, Vice Provost and Co-director, North Texas Institute for Educators on the Visual Arts. The letter is in regards to Morrisson discussing Mrs. Perry Bass (Nancy Lee) with his staff and have agree to let Davis approach her about matching the Getty grant for the North Texas Institute for Educators on the Visual Arts organization. The rest of the letter goes into the biography of Mrs. Bass and how to approach her with the interest in art.
Date:
February 17, 1989
Creator:
Morrisson, Clovis
Object Type:
Letter
System:
The UNT Digital Library
Low energy p p physics
A detailed investigation of proton-antiproton interactions at low energy has become feasible with the commissioning of the LEAR facility in 1983. We shall shortly review the status of {bar p}p annihilation at rest and the physics motivations for second generation experiments with the Crystal Barrel detector. This type of detector would be adequate for the study of both Kp and {bar p}p interactions on an extracted beam of the KAON Factory. We shall conclude with a few remarks on the physics opportunities with {bar p}'s at the KAON Factory which, in our opinion, will not be covered by the present LEAR facility. 11 refs., 10 figs., 2 tabs.
Date:
February 1, 1989
Creator:
Amsler, C.; Crowe, K. (Zurich Univ. (Switzerland). Inst. fuer Physik & Lawrence Berkeley Lab., CA (USA))
Object Type:
Article
System:
The UNT Digital Library
Advanced Coal-Fueled Gas Turbine Program
The objective of the original Request for Proposal was to establish the technological bases necessary for the subsequent commercial development and deployment of advanced coal-fueled gas turbine power systems by the private sector. The offeror was to identify the specific application or applications, toward which his development efforts would be directed; define and substantiate the technical, economic, and environmental criteria for the selected application; and conduct such component design, development, integration, and tests as deemed necessary to fulfill this objective. Specifically, the offeror was to choose a system through which ingenious methods of grouping subcomponents into integrated systems accomplishes the following: (1) Preserve the inherent power density and performance advantages of gas turbine systems. (2) System must be capable of meeting or exceeding existing and expected environmental regulations for the proposed application. (3) System must offer a considerable improvement over coal-fueled systems which are commercial, have been demonstrated, or are being demonstrated. (4) System proposed must be an integrated gas turbine concept, i.e., all fuel conditioning, all expansion gas conditioning, or post-expansion gas cleaning, must be integrated into the gas turbine system.
Date:
February 1, 1989
Creator:
Horner, M. W.; Ekstedt, E. E.; Gal, E.; Jackson, M. R.; Kimura, S. G.; Lavigne, R. G. et al.
Object Type:
Report
System:
The UNT Digital Library