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[Letter from Cassandra Broadus to Sylvia Russell, November 8, 1990]
Photocopy of a letter from Cassandra Broadus, North Texas Institute for Educators on the Visual Arts, to Sylvia Russell, Pilot Point Art Supervisor. In regards to Broadus modeling a DBAE, discipline-based art education, lesson for the teachers and participants at the meeting in Pilot Point and hoping they picked up something they will be able to use for their own classrooms. Broadus ends the letter with details about the upcoming visitation with a man named Vicente, for a "Potter on the Porch" lesson.
Date:
November 8, 1990
Creator:
Broadus, Cassandra
Object Type:
Letter
System:
The UNT Digital Library
Theoretical modeling and experimental characterization of planar defects in Y sub 2 Ba sub 4 Cu sub 6+x O sub 14+x
Crystallographic defects and phase transformations in the system Y{sub 2}Ba{sub 4}Cu{sub 6 + x}O{sub 14 + x}(0{le}{times}{le}4) are investigated by high resolution transmission electron microscopy (TEM) and static lattice, three dimensional Monte Carlo computer simulations. High resolution images of partially transformed (x = 2 to x = 1) material reveal a prevalence of CuO planar defects (stacking faults) associated with the transformation and an absence of disturbance to the perovskite Ba-Y-Ba blocks. An atomic mechanism involving the intercalculation and removal of extra CuO planes by partial dislocation climb, and requiring only a-b plane diffusion, is developed for the formation of such planar defects during changes in the layered YBaCuO crystal structure. Monte Carlo simulations based on the proposed transformation mechanism accurately reproduce the observed defects and known equilibrium structures. 24 refs., 4 figs.
Date:
November 1, 1990
Creator:
Burmester, C. P.; Fendorf, M.; Gronsky, R. & Wille, L. T.
Object Type:
Article
System:
The UNT Digital Library
Annual review of cultural resource investigations by the Savannah River Archaeological Research Program, fiscal year 1990
The Savannah River Archaeological Research Program (SRARP) of the South Carolina Institute of Archaeology and Anthropology, University of South Carolina, is funded through a direct contract with the United States Department of Energy to provide services required under federal law for the protection and management of archaeological resources on the Savannah River Site (SRS). Because the significance of most archaeological resources is dependent upon research potential, the SRARP is guided by research objectives. An on-going research program provides the problems, methods and means of assessing site significance within the compliance process specified by law. In addition, the SRARP maintains an active program of public education to disseminate knowledge about prehistory and history, and to enhance public awareness about historic preservation. The following report summarizes the management, research and public education activities of the SRARP during Fiscal Year 1990.
Date:
November 1, 1990
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Basic features of coherent radiation generated by relativistic charge bunches
Radiation generated by relativistic charges can be analyzed and described in exquisite detail. One reason that such detailed analysis is possible is because the phases of radiated photons often are determined completely by the initial conditions of the relativistic charges and the radiating system. The phase relationships between the initial charges and the radiated photons represent coherence in the emitted radiation. A previous paper described how this coherence could affect the spatial and spectral distributions of radiation generated by a single charge in a periodic radiator. The present paper discusses a complementary issue; namely, how the temporal shape of a relativistic charge bunch can emphasize specific features of the radiation generated at a single interaction site. 3 refs., 4 figs.
Date:
November 1, 1990
Creator:
Moran, M. J. & Chang, B.
Object Type:
Article
System:
The UNT Digital Library
Southwest Retort, Volume 44, Number [8], November 1990
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
November 1990
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Faculty Recital: 1990-11-15 - Jacqueline Hofto, flute
Access:
Use of this item is restricted to the UNT Community
Faculty recital performed at the UNT College of Music Concert Hall.
Date:
November 15, 1990
Creator:
Hofto, Jacqueline
Object Type:
Sound
System:
The UNT Digital Library
Guest Artist Recital: 1990-11-26 - Joseph Celli, experimental music
Access:
Use of this item is restricted to the UNT Community
Guest artist recital performed at the Merrill Ellis Intermedia Theater.
Date:
November 26, 1990
Creator:
Celli, Joseph
Object Type:
Sound
System:
The UNT Digital Library
Design-Development and Operation of the Experimental Boiling-Water Reactor (EBWR) Facility, 1955--1967
The Experimental Boiling-Water Reactor (EBWR) was designed, built, and operated to provide experience and engineering data that would demonstrate the feasibility of the direct-cycle, boiling-water reactor and be applicable to improved, larger nuclear power stations; and was based on information obtained in the first test boiling-water reactors, the BORAX series. EBWR initially produced 20 MW(t), 5 MW(e); later modified and upgraded, as described and illustrated, it was operated at up to 100 MW(t). The facility fulfilled its primary mission - demonstrating the practicality of the direct-boiling concept - and, in fact, was the prototype of some of the first commercial plants and of reactor programs in some other countries. After successful completion of the Water-Cooled Reactor Program, EBWR was utilized in the joint Argonne-Hanford Plutonium Recycle Program to develop data for the utilization of plutonium as a fuel in light-water thermal systems. Final shutdown of the EBWR facility followed the termination of the latter program.
Date:
November 1990
Creator:
Boing, L. E.; Wimunc, E. A. & Whittington, G. A.
Object Type:
Report
System:
The UNT Digital Library
A Portable Generic Elementary Function Package in Ada and an Accurate Test Suite
A comprehensive set of elementary functions has been implemented portably in Ada. The high accuracy of the implementation has been confirmed by rigorous analysis. Moreover, we present new test methods that are efficient and offer a high resolution of 0.005 unit in the last place. These test methods have been implemented portably here and confirm the accuracy of our implemented functions. Reports on the accuracy of other function libraries obtained by our test programs are also presented.
Date:
November 1990
Creator:
Tang, Ping Tak Peter
Object Type:
Report
System:
The UNT Digital Library
Materials Evaluation and Inspection : New Methods, Materials and Dimensions, Proceedings of the Conference Held at Argonne National Laboratory, September 25-26, 1989
A conference at Argonne National Laboratory for executives and technical personnel in small and medium-size manufacturing companies summarized how materials evaluation and inspection by nondestructive methods are changing and broadening. The application of these rapidly emerging techniques in maintaining and improving the quality and competitiveness of manufactured products was stressed. Individual papers have been cataloged separately.
Date:
November 1990
Creator:
Nevitt, Michael V. & Peterson, Norman D.
Object Type:
Report
System:
The UNT Digital Library
Two-Phase Flow Patterns and Frictional Pressure Gradients in a Small Rectangular Channel : a Comparison Between Two Horizontal Orientations
In horizontal flow through a rectangular channel, the channel cross section can be oriented so that the long side is either vertical or horizontal. The effect of cross-section orientation on the fluid dynamic characteristics of two-phase flow is of interest in plate-fin heat exchanger design because a heat exchanger can be similarly oriented to operate in either of the two orientations. An earlier study of two-phase flow patterns and frictional pressure gradients in a small rectangular channel with the channel cross section oriented with the long side vertical was performed and reported. This report presents the results of a complementary study of the same channel, but with the channel cross section oriented so that the long side was horizontal. Flow patterns were studied and a flow pattern map, using superficial gas and liquid velocities as co-ordinates, was developed. Measured two-phase frictional pressure drops were analyzed using the concept of two--phase flow multipliers. Results from the two channel orientations were compared. While there are some notable differences in flow patterns at low mass qualities and low mass fluxes, in the practical range of interest for plate-fin heat exchanger design the effects on frictional pressure gradient are minimal and the modified correlation …
Date:
November 1990
Creator:
Wambsganss, M. W.; Jendrzejczyk, J. A.; France, D. M. & Obot, Nsima T.
Object Type:
Report
System:
The UNT Digital Library
Stress Corrosion Cracking of Candidate Waste Container Materials
Six alloys have been selected as candidate container materials for the storage of high-level nuclear waste at the proposed Yucca Mountain site in Nevada. These materials are Type 304L stainless steel (SS), Type 316L SS, Incoloy 825, P-deoxidized Cu, Cu-30%Ni, and Cu-7%A1. The present program has been initiated to determine whether any of these materials can survive for 300 years in the site environment without developing through-wall stress corrosion cracks, and to assess the relative resistance of these materials to stress corrosion cracking (SCC). A series of slow-strain-rate tests (SSRTs) jn simulated Well J-13 water which is representative of the groundwater present at the Yucca Mountain site has been completed, and crack-growth-rate (CGR) tests are also being conducted under the same environmental conditions.
Date:
November 1990
Creator:
Maiya, P. S.; Soppet, W. K.; Park, J. Y.; Kassner, T. F.; Shack, W. J. & Diercks, D. R.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0150.0401]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Robert E. and Elouise Eberly join Bud Meade right, in unveiling a plaque that will hang in the Eberly Nature Center at Camp Classen in Davis."
Date:
November 2, 1990
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0144.0135]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Explorer scouts Andrea Thatcher and Jeff Morphis watch shoppers in the Heritage Park Mall parking lot along with police officer Bob Cronelison, who is the post's head advisor."
Date:
November 28, 1990
Creator:
Gooch, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0136.0570]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Helen and Bill Clearly welcome guests to their recent dinner party honoring Johnel and Frank Harrison."
Date:
November 7, 1990
Creator:
Sanger, Helen Ford
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0147.0186]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
November 20, 1990
Creator:
Gooch, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0146.0685]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Bob Hoover, Fleur Cowles, Tom Montagu-Mier and Ann Hoover, from left, greet guests at the recent luncheon at Remington Park."
Date:
November 7, 1990
Creator:
Sanger, Helen Ford
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0328.0183]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
November 6, 1990
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0352.0423]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Robert Knebel, a Boy Scout from troop 131, has received the eagle Award from Last Frontier Council, Boy Scout of America."
Date:
November 2, 1990
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0310B.0235]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Allan Potter, left, and Dr. Andrew John stand in John's game room, one of the most popular rooms in his house."
Date:
November 28, 1990
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0312B.0515]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Actor Gordon Jump, known for his television roles in the series WKRP and as the repairman in appliance commercials, tells a story to Southern Nazarene university president Loren Gresham and his wife, Linda, left, and Sarah Mincey and Steve Bailey at an auction to raise money for equipment for summer camps in the university's Excellence in Christian Education program."
Date:
November 8, 1990
Creator:
Sisney, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0328.0184]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
November 6, 1990
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Genetic changes in Mammalian cells transformed by helium cells
Midterm Syrian Hamster embryo (SHE) cells were employed to study high LET-radiation induced tumorigenesis. Normal SHE cells (secondary passage) were irradiated with accelerated helium ions at an incident energy of 22 MeV/u (9--10 keV/{mu}m). Transformed clones were isolated after growth in soft agar of cells obtained from the foci of the initial monolayer plated postirradiation. To study the progression process of malignant transformation, the transformed clones were followed by monolayer subculturing for prolonged periods of time. Subsequently, neoplasia tests in nude mice were done. In this work, however, we have focused on karyotypic changes in the banding patterns of the chromosomes during the early part of the progressive process of cell transformation for helium ion-induced transformed cells. 26 refs., 5 figs., 2 tabs.
Date:
November 1, 1990
Creator:
Durante, M.; Grossi, G. (Naples Univ. (Italy). Dipt. di Scienze Fisiche); Yang, T.C. & Roots, R. (Lawrence Berkeley Lab., CA (USA))
Object Type:
Article
System:
The UNT Digital Library
An evaluation of the Nb-93(n,n prime )Nb-93m dosimeter reaction for ENDF/B-VI
The Nb-93(n,n{prime})Nb-93m reaction plays an important role in nuclear energy applications. Because of its low threshold energy and relatively long half-life, it is a desirable reaction for long-term neutron fluence dosimetry in nuclear fission reactors. An evaluation of the differential cross section for this reaction was completed in 1985 by this laboratory as part of a comprehensive effort involving all neutron cross sections for niobium. The objective was to provide input for ENDF/B-VI. It was difficult to produce a reliable evaluation for this reaction in 1985 because the information available then was sparse and quite uncertain. In fact, that evaluation was based entirely on nuclear model calculations. The evaluated cross sections below 0.7 MeV were derived from calculations carried out in this laboratory, while the higher energy values were obtained from the work of Strohmaier and co-workers. In 1985 there was only one published experimental differential cross section value to consider for this reaction. Even the half-life of Nb-93m was in serious doubt. During the five years between the completion of the earlier evaluation and the finalization of ENDF/B-VI there have been some significant improvements and additions to the experimental database for this reaction. Also, new model calculations have been …
Date:
November 1, 1990
Creator:
Smith, D. L. & Geraldo, L. P.
Object Type:
Report
System:
The UNT Digital Library