Partner
Oklahoma Historical Society
13,192
UNT Libraries Special Collections
6,904
UNT Libraries Government Documents Department
6,610
Texas Historical Commission
1,333
UNT Libraries
480
Sterling Municipal Library
326
Dallas Museum of Art
281
Deaf Smith County Library
259
Carl Albert Congressional Research and Studies Center
191
Rice University Woodson Research Center
168
173 More
Collection
Oklahoma Publishing Company Photography Collection
10,247
KXAS-NBC 5 News Collection
6,179
Texas Digital Newspaper Program
4,686
Office of Scientific & Technical Information Technical Reports
4,531
Oklahoma Digital Newspaper Program
3,022
Tocker Foundation Grant
2,031
THC National Register Collection
1,262
Technical Report Archive and Image Library
761
USGS Topographic Map Collection
609
The Oklahoma City Times
522
309 More
Serial/Series Title
NBC News Clips
6,176
Lakes Heritage Region
792
United States Department of Energy Grand Junction Office Reports
526
The Oklahoma City Times
522
7.5 Minute Series (Topographic)
360
The Altus Times
313
The Chickasha Daily Express
313
The Baytown Sun
311
Sapulpa Daily Herald
310
The Perry Daily Journal
309
510 More
Degree Department
Degree Discipline
Degree Level
Country
States
Year
Month
Mathematical models and illustrative results for the RINGBEARER II monopole/dipole beam-propagation code
RINGBEARER II is a linearized monopole/dipole particle simulation code for studying intense relativistic electron beam propagation in gas. In this report the mathematical models utilized for beam particle dynamics and pinch field computation are delineated. Difficulties encountered in code operations and some remedies are discussed. Sample output is presented detailing the diagnostics and the methods of display and analysis utilized.
Date:
May 24, 1982
Creator:
Chambers, F.W.; Masamitsu, J.A. & Lee, E.P.
Object Type:
Report
System:
The UNT Digital Library
Study of Isovector Resonances With Pion Charge Exchange
Studies with the pion charge exchange reactions (..pi../sup +-/,..pi../sup 0/) at 164 MeV using the LAMPF ..pi../sup 0/ spectrometer are yielding new results on the existence and systematic features of isovector resonances in nuclei. These experiments possess an unusually high signal/background ratio for isovector resonances of low-multipolarity. Results obtained to date are: (1) observation and angular disribution measurement of the giant dipole resonance in nuclei /sup 12/C, /sup 40/Ca, /sup 90/Zr, and /sup 120/Sn; and (2) observation and angular distribution measurements in the (..pi../sup -/,..pi../sup 0/) reaction on /sup 90/Zr and /sup 120/Sn of large signals possessing the expected angular distribution shapes and magnitudes for the isovector monopole resonance. Excitation energies are near the hydrodynamical model values 170 A/sup -//sup 1/3/ MeV. Differential cross sections are approximately 0.7 J/sub 1//sup 2/(qR) mb/sr. An overview of this experimental program, with emphasis on new results and how they correlate with existing knowledge on the isovector resonances, is presented.
Date:
January 1, 1982
Creator:
Baer, H.W.; Bolton, R. & Bowman, J.D.
Object Type:
Article
System:
The UNT Digital Library
Formation of a quark-gluon plasma in nuclear collisions
The spatial dependence of the energy deposition in the fragmentation regions is estimated for nuclear collisions at ISR energies, ..sqrt..s/A >approx. 30 GeV/nucleon. Two models (the trailing cascade and sequential decay scenarios) are contrasted. The results are compared to the quark-gluon plasma energy density computed via QCD lattice methods.
Date:
June 1, 1982
Creator:
Gyulassy, M.
Object Type:
Article
System:
The UNT Digital Library
Incentives and the siting of radioactive waste facilities
The importance of social and institutional issues in the siting of nuclear waste facilities has been recognized in recent years. Limited evidence from a survey of rural Wisconsin residents in 1980 indicates that incentives may help achieve the twin goals of increasing local support and decreasing local opposition to hosting nuclear waste facilities. Incentives are classified according to functional categories (i.e., mitigation, compensation, and reward) and the conditions which may be prerequisites to the use of incentives are outlined (i.e., guarantee of public health and safety, some measure of local control, and a legitimation of negotiations during siting). Criteria for evaluating the utility of incentives in nuclear waste repository siting are developed. Incentive packages may be more useful than single incentives, and nonmonetary incentives, such as independent monitoring and access to credible information, may be as important in eliciting support as monetary incentives. Without careful attention to prerequisites in the siting process it is not likely that incentives will facilitate the siting process.
Date:
August 1, 1982
Creator:
Carnes, S. A.; Copenhaver, E. D.; Reed, J. H.; Soderstrom, E. J.; Sorensen, J. H.; Peelle, E. et al.
Object Type:
Report
System:
The UNT Digital Library
Coordinate system control: adaptive meshes
The discussion of the formulation and properties of the adaptive mesh algorithm is as complete as space permits. As should be clear from the discussion, adaptive gridding is most useful for singular perturbation problems where localized regions with large gradients develop spontaneously. Often, choosing the correct weight function is not trivial, and, sometimes, it is appropriate to cause the mesh to respond to structure in several dependent variables simultaneously.
Date:
January 1, 1982
Creator:
Brackbill, J.U.
Object Type:
Article
System:
The UNT Digital Library
Short-lived positron emitter labeled radiotracers - present status
The preparation of labelled compounds is important for the application of positron emission transaxial tomography (PETT) in biomedical sciences. This paper describes problems and progress in the synthesis of short-lived positron emitter (/sup 11/C, /sup 18/F, /sup 13/N) labelled tracers for PETT. Synthesis of labelled sugars, amino acids, and neurotransmitter receptors (pimozide and spiroperidol tagged with /sup 11/C) is discussed in particular. (DLC)
Date:
January 1, 1982
Creator:
Fowler, J. S. & Wolf, A. P.
Object Type:
Article
System:
The UNT Digital Library
Wiggler, undulator, and free-electron laser-radiation sources development at the National Synchrotron Light Source
An overview is presented of the special radiation sources development at the NSLS for incorporation in a 2.5 GeV X-ray storage ring and a 700 MeV vuv storage ring. This includes a superconducting high field multipole wiggler, lambda/sub c/ = 0.5A; a permanent magnet wiggler, lambda/sub c/ = 2.0A; a maximum photon energy undulator (5 to 7 keV); an undulator for a soft X-ray line or continuum spectrum and a free electron laser source tunable in the 2500 to 4500A region. Source characteristics and status of development are given. In addition, the incorporation of a backscattered Compton photon source is being studied and relevant parameters are presented.
Date:
January 1, 1982
Creator:
Hsieh, H.; Krinsky, S.; Luccio, A.; Pellegrini, C. & van Steenbergen, A.
Object Type:
Article
System:
The UNT Digital Library
Qualitative analysis of mouse specific-locus mutations: information on genetic organization, gene expression, and the chromosomal nature of induced lesions
Analysis of mouse specific-locus (SL) mutations at three loci has identified over 33 distinct complementation groups - most of which are probably overlapping deficiencies - and 13 to 14 new functional units. The complementation maps that have been generated for the d-se and c regions include numerous vital functions; however, some of the genes in these regions are non-vital. At such loci, hypomorphic mutants must represent intragenic alterations, and some viable nulls could conceivably be intragenic lesions also. Analysis of SL mutations has provided information on genetic expression. Homozygous deficiencies can be completely viable or can kill at any one of a range of developmental stages. Heterozygonus deficiencies of up to 6 cM or more in genetic length have been recovered and propagated. The time of death of homozygous and the degree of inviability of heterozygous deficiencies are related more to specific content of the missing segment than to its length. Combinations of deficiencies with x-autosome translocations that inactivate the homologous region in a mosaic fashion have shown that organismic lethals are not necessarily cell lethal. The spectrum of mutations induced depends on the nature of the mutagen and the type of germ cell exposed. Radiation of spermatogonia produces intragenic …
Date:
January 1, 1982
Creator:
Russell, L.B.
Object Type:
Article
System:
The UNT Digital Library
Alternative dipole magnets for ISABELLE
A dipole magnet, intended as a possible alternative for the ISABELLE main-ring magnet, was designed at LBL. Three layers of FNAL Doubler/Saver conductor were used. Two 1.3-m-long models were built and tested, both with and without an iron core, and in both helium I and helium II. The training behavior, cyclic energy loss, point of quench initiation, and quench velocity were determined. A central field of 6.5 tesla was obtained in He I (4.4 K), and 7.6 tesla in He II (1.8K).
Date:
May 1, 1982
Creator:
Taylor, C.; Althaus, R.; Caspi, S.; Gilbert, W.; Hassenzahl, W.; Meuser, R. et al.
Object Type:
Article
System:
The UNT Digital Library
Existence of fcc TiCr/sub 1/ /sub 8/H/sub 5/ /sub 3/
Originally an orthorhombic structure was assigned to the non-stoichiometric hydride TiCr/sub 1/ /sub 8/H/sub 3/ /sub 6/. Recent neutron and x-ray diffraction data indicated, however, that an alternate interpretation was possible, i.e. the solid consists of two hydride phases, an ..cap alpha..' Laves phase having a composition of TiCr/sub 1/ /sub 8/H/sub 2/ /sub 8/ and an fcc phase with a much higher hydrogen content. This proved to be the case and it has been determined that the high concentration phase has a disordered fluorite structure with a/sub o/=4.27 A. Its hydrogen content, as estimated from diffraction peak intensities, corresponds to TiCr/sub 1/ /sub 8/H/sub 5/ /sub 3/. We have not been able to produce single phase fcc material but have prepared a mixed phase sample with an overall composition of TiCr/sub 1/ /sub 8/H/sub 4/ /sub 8/. The high-pressure reaction leading to the formation of the fluorite phase is very sluggish and irreversible. Pressure-composition-temperature (p-c-T) properties of this system have been determined and are discussed and a revised phase diagram is proposed.
Date:
February 1, 1982
Creator:
Johnson, J. R.; Reilly, J. J.; Reidinger, F.; Corliss, L. M. & Hastings, J. M.
Object Type:
Article
System:
The UNT Digital Library
Radiation standards and calibrations. FY-1981 annual report
The research program encompasses: reviewing calibration standards, regulations, and handbooks; assuring that calibration procedures used are in agreement with technically accepted methods; maintaining basic radioactive sources and instruments that serve as radiological standards; and providing traceability to the National Bureau of Standards where possible. In addition, major efforts are being expended to upgrade the 318 calibration facility. This report focuses on major accomplishments during FY-1981. However, most maintenance and quality assurance efforts involve routine support and only a summary report is provided. (PSB)
Date:
July 1, 1982
Creator:
Roberson, P. L.; Yoder, R. C.; Fox, R. A.; Hooker, C. D.; Hogan, R. T.; Holbrook, K. L. et al.
Object Type:
Report
System:
The UNT Digital Library
Degenerate perturbation theory
The algebraic structure of degenerate Rayleigh-Schroedinger perturbation theory is reviewed. There are a number of different but equivalent algorithms which generate this perturbation series; we argue that the frequent need to carry out infinite-order partial summations selects one of these algorithms as the most efficient. Recent developments include coupled-cluster formulations for open shells, a new diagrammatic representation, and the concept of incomplete model subspaces. These subjects are reviewed, as well as some applications.
Date:
January 1, 1982
Creator:
Brandow, B.
Object Type:
Article
System:
The UNT Digital Library
Analysis of x-ray production in TMX upgrade
TMX Upgrade (TMX-U), a tandem mirror experiment at LLNL, will use high power microwaves for electron cyclotron resonant heating (ECRH). As demonstrated on Elmo Bumpy Torus (EBT) and related experiments which use similar heating techniques, high energy electron populations are created. In these devices, which run CW, significant x-ray production occurs and adequate shielding must be provided for personnel protection. TMX-U is a pulsed experiment; however, significant x-ray production is expected from the 50 keV mean energy electron population. In this report the expected x-ray generation is calculated and the provisions for shielding are described. Based upon these calculations, as well as scaling estimates from other devices, the provided shielding is shown to be adequate for hot electron temperatures of interest for the experiment.
Date:
February 4, 1982
Creator:
Stallard, B. & Stephens, L.
Object Type:
Report
System:
The UNT Digital Library
Non-Darcy flow in geothermal reservoirs
The effects of non-Darcy flow laws are investigated for two geothermal reservoir types: multiphase and Hot Dry Rock (HDR). Long-term thermal behavior is emphasized as short-term pressure transient behavior is addressed in the oil field literature. Comparisons of Darcy and non-Darcy flow laws are made.
Date:
January 1, 1982
Creator:
Zyvoloski, G.
Object Type:
Article
System:
The UNT Digital Library
National Synchrotron Light Source and special radiation-sources development
Design features are presented of the two high current electron storage rings comprising the National Synchrotron Light Source and its basic parameters are enumerated. In addition, an overview is presented of the special radiation sources under construction and development, including a superconducting wiggler, permanent magnet wiggler, x-ray and vuv undulators, free electron laser source and Compton backscattered ..gamma.. source.
Date:
January 1, 1982
Creator:
van Steenbergen, A.
Object Type:
Article
System:
The UNT Digital Library
Validation of SSC using the FFTF natural-circulation tests
As part of the Super System Code (SSC) validation program, the 100% power FFTF natural circulation test has been simulated using SSC. A detailed 19 channel, 2 loop model was used in SSC. Comparisons showed SSC calculations to be in good agreement with the Fast Flux Test Facility (FFTF), test data. Simulation of the test was obtained in real time.
Date:
January 1, 1982
Creator:
Horak, W.C.; Guppy, J.G. & Kennett, R.J.
Object Type:
Article
System:
The UNT Digital Library
Elements of high constructive deltaic sedimentation, lower Frio Formation, Brazoria County, Texas
The lower Frio Formation in eastern Brazoria County, upper Texas Gulf Coast, was deposited in a high constructive deltaic environment in the Houston delta system. Constructive elements of the stacked, elongate to lobate deltas that were intersected in core are storm induced delta front splays, delta front slump deposits, and distributary mouth bar, distributary channel and delta plain assemblages. Reworked and winnowed abandonment facies that are volumetrically insignificant relative to constructive elements are subdivided into a crossbedded shoreface-foreshore subfacies and a fine grained cyclic sequence of storm deposits on the lower shoreface that represent a distal abandonment subfacies. Micropaleontological evidence indicates that deposition of constructive and abandonment facies took place in water depths of less than 120 feet.
Date:
January 1, 1982
Creator:
Tyler, N. & Han, J. H.
Object Type:
Article
System:
The UNT Digital Library
Study of technetium uptake in vegetation in the vicinity of the Portsmouth Gaseous Diffusion Plant
Technetium-99 was measured in vegetation and soil collected on and near the Portsmouth Gaseous Diffusion Plant to obtain an estimate of the soil-to-vegetation concentration factors. The concentration factors appear to be lognormally distributed with a geometric mean of 3.4 (Bq/kg dry wt. tissue per Bq/kg dry wt. soil) and a geometric standard deviation of 4.7. A dose commitment was calculated using a hypothetical 3.7 x 10/sup 10/ Bq Tc-99/year release and the actual CY-1981 concentration release of Tc-99. The radiological significance of Tc-99 in the terrestial food chain is substantially less than previously believed.
Date:
January 1, 1982
Creator:
Acox, T.A.
Object Type:
Article
System:
The UNT Digital Library
Future engineering needs of mirror fusion reactors
Fusion research has matured during the last decade and significant insight into the future program needs has emerged. While some will properly note that the crystal ball is cloudy, it is equally important to note that the shape and outline of our course is discernable. In this short summary paper, I will draw upon the National Mirror Program Plan for mirror projects and on available design studies of these projects to put the specific needs of the mirror program in perspective.
Date:
July 30, 1982
Creator:
Thomassen, K.I.
Object Type:
Article
System:
The UNT Digital Library
Experimental Determination of the Effective Nucleon-Nucleon Interaction for P-Nucleus Reactions at Intermediate Energies
A complete measurement of the polarization transfer observables has been made for the first time in the (p,p') reaction at intermediate energies. Measurements are reported for the /sup 12/C(p,p') /sup 12/C reaction to the 1/sup +/, T = 0(12.71 MeV) and 1/sup +/, T = 1(15.11 MeV) states at 500 MeV at laboratory scattering angles of 3.5/sup 0/, 5.5/sup 0/, 7.5/sup 0/, and 12.0/sup 0/. Linear combinations of these observables are shown to exhibit a very selective dependence on the isoscalar and isovector spin-dependent components of the nucleon-nucleon interaction. To the extent of the validity of the single collision approximation, these amplitudes are compared directly to the free nucleon-nucleon amplitudes at small momentum transfers ( < 1 fm/sup -1/).
Date:
January 1, 1982
Creator:
McClelland, J. B.; Aas, B. & Azizi, A.
Object Type:
Article
System:
The UNT Digital Library
Accommodation project for physically restricted personnel. Phase II. Low back project
This report presents a course outline and its associated criteria for a Back Pain Prevention Program for Sandia National Laboratories.
Date:
August 1, 1982
Creator:
Young, L. L. & Mossman, P. B.
Object Type:
Report
System:
The UNT Digital Library
High resolution positron Q-value measurements and nuclear structure studies far from the stability line. Progress report
Research progress in briefly described, and details are presented in the attached preprints and reprints: (1) precision mass differences in light rubidium and krypton isotopes utilizing beta endpoint measurements; (2) precision mass measurements utilizing beta endpoints; (3) Monte Carlo calculations predicting the response of intrinsic GE detectors to electrons and positrons; and (4) reactor antineutrino spectra and nuclear spectroscopy of isotopes far from beta stability. (WHK)
Date:
February 28, 1982
Creator:
Avignone, F. T. III
Object Type:
Report
System:
The UNT Digital Library
Mushy-zone model with an exact solution
In this paper we propose a very simple model of a mushy zone which admits of an explicit solution. To our knowledge, it is the only instance where an actual observation of the mushy zone width and structure is used as a partial basis for the model definition. The model rests upon two unknown parameters. The first determines the relation between the equilibrium temperature gradient and the mushy zone width. The second depends upon the dendritic structure in the mushy zone, and is related to the solid fraction. Both can be estimated from experiments. We will limit ourselves to defining the model, presenting its closed form solution, and giving tables from which the solution can be found explicitly. It is shown that in most cases the predicted mushy zone is of very negligible importance.
Date:
April 1, 1982
Creator:
Solomon, A. D.; Wilson, D. G. & Alexiades, V.
Object Type:
Report
System:
The UNT Digital Library
Thresholds for the onset of fluid and magnetofluid turbulence
Hydrodynamic stability theory has focussed on a few simple test cases to obtain the sharpest possible confrontations between theory and experiment. Six of these are briefly reviewed: plane Poiseuille and Couette flow, pipe flow, rotating Couette flow, thermally-driven Benard convection, and the Blasius laminar boundary layer. Linear perturbation theory seems inadequate in the first three cases, and satisfactory in the last three. Insufficient information, experimental or theoretical, exists in magnetohydrodynamics to make any comparably decisive tests.
Date:
January 1, 1982
Creator:
Montgomery, D.
Object Type:
Article
System:
The UNT Digital Library