Partner
UNT Libraries Government Documents Department
3,423
Texas Historical Commission
1,059
Oklahoma Historical Society
200
UNT Libraries Special Collections
80
Abilene Christian University Library
16
UNT Libraries
13
Oklahoma State Firefighters Museum
11
Sterling Municipal Library
11
UNT College of Arts and Sciences
8
Carl Albert Congressional Research and Studies Center
6
72 More
Collection
Office of Scientific & Technical Information Technical Reports
3,382
THC National Register Collection
1,058
Texas Digital Newspaper Program
182
Oklahoma Publishing Company Photography Collection
119
Oklahoma Digital Newspaper Program
97
Tocker Foundation Grant
77
KXAS-NBC 5 News Collection
37
D. Jack Davis Art Education Collection
29
Texas State Publications
17
Congressional Research Service Reports
16
114 More
Degree Department
Year
Month
Day
Results:
1 - 24 of
4,982
next
Inclusive. eta. production in. tau. decays
We have searched for inclusive eta production in tau decays using a sample of 2553 events of e{sup +}e{sup minus} {yields} {tau}{sup +}{tau}{sup minus} in the one-three topology. The data were taken with the High Resolution Spectrometer at {radical}s = 29 GeV. Our results are based on an analysis of the {pi}{sup +}{pi}{sup minus} invariant mass spectrum to find the narrow peak resulting from the decay sequence {tau} {yields} {eta}x and {eta} {yields} {pi}{sup +}{pi}{sup minus}{pi}{degree}. No clear peak is observed and a 90% confidence upper limit on the process {tau} {yields} {eta}x of 2.1% is found. For decays {tau} {yields} {eta}{eta}x the 90% confidence upper limit is 1.3%. Our best limit on {tau} {yields} {eta}{eta}x is obtained from tau decay to five charged particles with a 90% confidence level upper limit of 0.5%.
Date:
January 1, 1987
Creator:
Abachi, S.; Akerlof, C.; Baringer, P.; Blockus, D.; Brabson, B.; Brom, J. M. et al.
Object Type:
Article
System:
The UNT Digital Library
Search for D/sup *//sup 0/. -->. D/sup +/. pi. /sup -/
We report on a search for the decay mode D/sup *//sup 0/(2007) ..-->.. D/sup +/..pi../sup -/ using the High Resolution Spectrometer at PEP. Although this decay is kinematically forbidden for the central mass value, it can occur through the natural width of the D/sup *//sup 0/. The D/sup +/ was reconstructed in the K/sup -/..pi../sup +/..pi../sup +/ decay mode. The mass difference distribution (K/sup -/..pi../sup +/..pi../sup +/..pi../sup +/) - (K/sup -/..pi../sup +/..pi../sup -/), which shows no threshold enhancement, leads to a preliminary upper limit on the branching ratio of B/sub r/(D/sup *//sup 0/ ..-->.. D/sup +/..pi../sup -/) < 15% at 90% CL. This, in turn, corresponds to an upper limit on the D/sup *//sup 0/ width of 1.5 MeV/c/sup 2/ at 90% CL. 4 refs., 3 figs.
Date:
January 1, 1987
Creator:
Abachi, S.; Akerlof, C.; Baringer, P.; Blockus, D.; Brabson, B.; Brom, J.M. et al.
Object Type:
Article
System:
The UNT Digital Library
Mechanical design of a large bore quadrupole triplet magnet
The mechanical design and construction of a 1 meter bore, low gradient quadrupole triplet is described. The magnet will be used for focussing a proton beam in accelerator studies of neutral particle at the Los Alamos National Laboratory. A significant feature of this magnet design is the precision location of the coil conductors within the steel yoke tube. Each of the quadrupole coils have been fabricated from water cooled aluminum conductor, wound in a cosine 2-theta geometry. The conductor bundles have been wound to a positional accuracy within +-0.050 cm which was required to reduce the harmonic content to less than 0.04% of the quadrupole field. Important aspects of the design, construction and assembly are described.
Date:
March 1, 1987
Creator:
Abbott, S.; Caylor, R.; Fong, E. & Tanabe, J.
Object Type:
Article
System:
The UNT Digital Library
Measurement of Energy and Charged Particle Emission in the Central Rapidity Region from O + A and p + A collisions at 14. 5 GeV/c per Nucleon and Preliminary Results from Si + A collisions
The first data from a 160 beam of total energy 232 GeV at the BNL Tandem-AGS are discussed. Preliminary results from a /sup 28/Si beam of total energy 406 GeV are also shown. The full complement of E-802, including a magnetic spectrometer, was used for the /sup 28/Si measurement. A different experimental arrangement was used for 160. Comparison measurements with proton beams are presented for both configurations. 12 refs., 12 figs.
Date:
January 1, 1987
Creator:
Abbott, T.; Akiba, Y.; Alburger, D.; Beavis, D.; Betts, R. R.; Bloomer, M. A. et al.
Object Type:
Article
System:
The UNT Digital Library
Elastic Scattering of Muon Neutrinos at BNL
In this paper measurement of the purely leptonic reactions: nu/sub ..mu../e ..-->.. nu/sub ..mu../e and anti nu/sub ..mu../e ..-->.. anti nu/sub ..mu../e, and the semileptonic reactions: nu/sub ..mu../p ..-->.. nu/sub ..mu../p and anti nu/sub ..mu../p ..-->.. anti nu/sub ..mu../p are presented and discussed in terms of the standard model. The data also places limites of interest on the magnitudes of a possible neutrino charge radius and a neutrino magnetic moment.
Date:
February 1, 1987
Creator:
Abe, K.; Ahrens, L. A.; Amako, K.; Aronson, S. H.; Beier, E. W.; Callas, J. L. et al.
Object Type:
Article
System:
The UNT Digital Library
Preparing the radiation protection worker to meet multiple needs
At the Oak Ridge National Laboratory (ORNL) the radiation protection worker aids in protecting personnel and their surrounding environment from the hazards of radiation. These individuals use their technical knowledge, skills, and abilities to survey and monitor various project-related activities. They must also provide guidance in project design, development, and implementation. These combined efforts assure that protective measures are taken in accordance with applicable standards. The ORNL performance-based training program enhances the skills of the worker. The program incorporates job specific information on the diverse facilities and activities monitored with basic fundamentals of radiation protection. Successful completion of this program includes passing both a qualification exam and an on-the-job skills review. This paper details the structure of such a program and explains the strategies taken to reach the program's goals. 4 refs., 2 tabs.
Date:
January 1, 1987
Creator:
Abercrombie, J.S. & Thorpe, B.C.
Object Type:
Article
System:
The UNT Digital Library
Experience in using workstations as hosts in an accelerator control environment
A new control system has been used for light ion acceleration at the Alternating Gradient Synchrotron (AGS). The control system uses Apollo workstations in the dual role of console hardware computer and controls system host. It has been found that having a powerful dedicated CPU with a demand paging virtual memory OS featuring strong interprocess communication, mapped memory shared files, shared code, and multi-window capabilities, allows us to provide an efficient operation environment in which users may view and manage several control processes simultaneously. The same features which make workstations good console computers also provide an outstanding platform for code development. The software for the system, consisting of about 30K lines of ''C'' code, was developed on schedule, ready for light ion commissioning. System development is continuing with work being done on applications programs.
Date:
March 1, 1987
Creator:
Abola, A.; Casella, R.; Clifford, T.; Hoff, L.; Katz, R.; Kennell, S. et al.
Object Type:
Article
System:
The UNT Digital Library
Sequence dependent structure and thermodynamics of DNA oligonucleotides and polynucleotides: uv melting and NMR (nuclear magnetic resonance) studies
Thermodynamic parameters for double strand formation have been measured for the twenty-five DNA double helices made by mixing deoxyoligonucleotides of the sequence dCA/sub 3/XA/sub 3/G with the complement dCT/sub 3/YT/sub 3/G. Each of the bases A, C, G, T, and I (I = hypoxanthine) have been substituted at the positions labeled X and Y. The results are analyzed in terms of nearest neighbors. At higher temperatures the sequences containing a G)centerreverse arrowdot)C base pair become more stable than those containing only A)centerreverse arrowdot)T. All molecules containing mismatcher are destabilized with respect to those with only Watson-Crick pairing, but there is a wide range of destabilization. Large neighboring base effects upon stability were observed. For example, when (X, Y) = (I, A), the duplex is eightfold more stable than when (X, Y) = (A, I). Independent of sequence effects the order of stabilities is: I)centerreverse arrowdot)C )succ) I)centerreverse arrowdot) A)succ) I)centerreverse arrowdot)T approx. I)centerreverse arrowdot)G. All of these results are discussed within the context of models for sequence dependent DNA secondary structure, replication fidelity and mechanisms of mismatch repair, and implications for probe design. The duplex deoxyoligonucleotide d(GGATGGGAG))centerreverse arrowdot)d(CTCCCATCC) is a portion of the gene recognition sequence of the protein transcription …
Date:
December 1, 1987
Creator:
Aboul-ela, F. M.
Object Type:
Report
System:
The UNT Digital Library
Sodium waste technology: A summary report. [Melt-drain-evaporation-calcination (MEDEC)]
The Sodium Waste Technology (SWT) Program was established to resolve long-standing issues regarding disposal of sodium-bearing waste and equipment. Comprehensive SWT research programs investigated a variety of approaches for either removing sodium from sodium-bearing items, or disposal of items containing sodium residuals. The most successful of these programs was the design, test, and the production operation of the Sodium Process Demonstration Facility at ANL-W. The technology used was a series of melt-drain-evaporate operations to remove nonradioactive sodium from sodium-bearing items and then converting the sodium to storable compounds.
Date:
January 1, 1987
Creator:
Abrams, C. S. & Witbeck, L. C.
Object Type:
Report
System:
The UNT Digital Library
Fast Energy and Energy Spectrum Feedback in the SLC Linac
The energies and energy spectra of the positron and electron beams emerging from the SLC Linac must be carefully maintained so that the beams can be transported through the Arcs to the Final Focus without phase space dilution and also to specify the collision energy. A fastback system has been designed and constructed to control these parameters. The energies and energy spectra are measured nondestructively using position monitors and synchrotron radiation width monitors. The controls consist of rf phases in the Damping Rings, SLED timing, and rf amplitude. Theoretical aspects of the feedback process, algorithms, and operational experience are discussed.
Date:
January 1, 1987
Creator:
Abrams, G. S.; Soderstrom, E.; Seeman, J. T.; Campisi, I. E.; Herrmannsfeldt, W.; Lee, M. et al.
Object Type:
Article
System:
The UNT Digital Library
The development of a selective ruthenium catalyst
A micelle technique was developed for preparing supported catalysts with different size ruthenium particles. Ruthenium was stabilized on the support, light ends make was minimized and activity was maximized by adjusting the ruthenium particle size and the metal-support interaction. The most promising catalysts consisted of 10--15 nm ruthenium particles on an alumina-titania support and 4--6 nm ruthenium particles on an alumina support. Stability improvement was determined to be the major catalyst developmental need. Work during the next quarter will focus on the development of a stable ruthenium catalyst.
Date:
January 1, 1987
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Instabilities of higher dimensional compactifications
Various schemes for cosmological compactification of higher dimensional theories are considered. Possible instabilities which drive the ground state with static internal space to de Sitter-like expansion of all dimensions are discussed. These instabilities are due to semiclassical barrier penetration and classical thermal fluctuations. For the case of the ten dimensional Chapline-Manton action, it is possible to avoid such difficulties by balancing one-loop Casimir corrections against monopole contributions from the field strength H/sub MNP/ and fermionic condensates. 10 refs.
Date:
February 1, 1987
Creator:
Accetta, F.S.
Object Type:
Article
System:
The UNT Digital Library
IR laser excitation in molecules: Chaos and diffusive energy growth
After a short review of a generic vibrational model of ir multiple-photon excitation, the model is generalized to include rotations. It is shown that the combination of chaotic dynamics and rotational averaging leads to fluence-dependent absorption which removes the sensitivity of the results to model-dependent parameters. The classical rotation-vibration dynamics observed in this model correlate very well with quantum intuition based on a molecule's P, Q, and R-branch structure and on the red-shift of the vibrational absorption with excitation. The implication of these results for MPE experiments is discussed.
Date:
January 1, 1987
Creator:
Ackerhalt, J. R. & Milonni, P. W.
Object Type:
Article
System:
The UNT Digital Library
Comment on "Thermochemical Investigations of Associated Solutions: Calculation of Solute-Solvent Equilibrium Constants from Solubility Measurements"
This article provides comments on "Thermochemical Investigations of Associated Solutions: Calculation of Solute-Solvent Equilibrium Constants from Solubility Measurements," published in the Journal of Pharmaceutical Sciences in 1983.
Date:
July 1, 1987
Creator:
Acree, William E. (William Eugene)
Object Type:
Article
System:
The UNT Digital Library
Thermochemical Investigations of Associated Solutions: 5. Calculation of Solute-Solvent Equilibrium Constants from Solubility in Mixtures Containing Two Complexing Solvents
Article on thermochemical investigations of associated solutions and the calculation of solute-solvent equilibrium constants from solubility in mixtures containing two complexing solvents.
Date:
July 1, 1987
Creator:
Acree, William E. (William Eugene) & McCargar, James W.
Object Type:
Article
System:
The UNT Digital Library
Nuclear breakup and particle densities in 200 A GeV - /sup 16/O interactions with emulsion nuclei
Experiment EMU-01 makes use of emulsion chambers and conventional stacks to study the interactions in matter of 200 A GeV /sup 16/O nuclei accelerated at the CERN SPS. Projectile fragmentation is compatible with such interactions of /sup 16/O nuclei at 2 A GeV, indications of limiting fragmentation. Particle production is examined via high precision pseudo-rapidity distributions. Energy densities up to about 3 GeVfm/sup 3/ are observed in central /sup 16/O + Ag(Br) interactions. Pseudo-rapidity density distributions and fluctuations are well reproduced by the MC model Pritiof, although the existence of new and unknown sources of density fluctuations are not excluded by the data. 7 refs., 7 figs.
Date:
September 1, 1987
Creator:
Adamovich, M.I.; Alexandrov, Y.A.; Asimov, S.A.; Badyal, S.K.; Basova, E. & Bhalla, K.B.
Object Type:
Article
System:
The UNT Digital Library
Boundary-projection acceleration: A new approach to synthetic acceleration of transport calculations
We present a new class of synthetic acceleration methods which can be applied to transport calculations regardless of geometry, discretization scheme, or mesh shape. Unlike other synthetic acceleration methods which base their acceleration on P1 equations, these methods use acceleration equations obtained by projecting the transport solution onto a coarse angular mesh only on cell boundaries. We demonstrate, via Fourier analysis of a simple model problem as well as numerical calculations of various problems, that the simplest of these methods are unconditionally stable with spectral radius less than or equal toc/3 (c being the scattering ratio), for several different discretization schemes in slab geometry. 28 refs., 4 figs., 3 tabs.
Date:
January 1, 1987
Creator:
Adams, M. L. & Martin, W. R.
Object Type:
Article
System:
The UNT Digital Library
Marker Development
This report is to discuss the marker development for radioactive waste disposal sites. The markers must be designed to last 10,000 years, and place no undue burdens on the future generations. Barriers cannot be constructed that preclude human intrusion. Design specifications for surface markers will be discussed, also marker pictograms will also be covered.
Date:
May 1, 1987
Creator:
Adams, M. R.
Object Type:
Report
System:
The UNT Digital Library
The Paducah Post (Paducah, Tex.), Vol. 80, No. 45, Ed. 1 Thursday, January 1, 1987
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
January 1, 1987
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
A general topology, Godunov method
A numerical technique that utilizes a general topology mesh is described. The method employs the arbitrary Lagrangian-Eulerian procedure and explicit, finite-volume, Godunov numerics. Material interfaces are resolved to eliminate fictitious mixing and nonphysical shear impedance. Cell-centered variables, including velocity, are used to provide consistent control volumes for the advection of mass, momentum, and energy, and to allow arbitrary slip between material regions. The computational mesh is composed of arbitrary polygonal cells. The constraint of a fixed logical connectivity for the mesh is removed. Consequently, geometrical mesh limitations, which are responsible for inaccuracies and code failure during the evolution of region boundaries, are absent. Arbitrary boundaries can be resolved, and the mesh is capable of changing smoothly and rapidly from regions of high to low resolution. Lack of a coherent mesh orientation minimizes numerical anisotropy. A mesh rezoning approach, based on a dual triangulation and coupled with a global remapping algorithm, allows the mesh to evolve dynamically. 9 refs., 6 figs.
Date:
January 1, 1987
Creator:
Addessio, F.; Cline, M. & Dukowicz, J.
Object Type:
Article
System:
The UNT Digital Library
The Mark III Vertex Chamber
The design and construction of the new Mark III vertex chamber is described. Initial tests with cosmic rays prove the ability of track reconstruction and yield triplet resolutions below 50 ..mu..m at 3 atm using argon/ethane (50:50). Also performed are studies using a prototype of a pressurized wire vertex chamber with 8 mm diameter straw geometry. Spatial resolution of 35mm was obtained using dimethyl ether (DME) at 1 atm and 30 ..mu..m using argon/ethane (50/50 mixture) at 4 atm. Preliminary studies indicate the DME to adversely affect such materials as aluminized Mylar and Delrin.
Date:
July 1, 1987
Creator:
Adler, J.; Bolton, T.; Bunnell, K.; Cassell, R.; Cheu, E.; Freese, T. et al.
Object Type:
Article
System:
The UNT Digital Library
Emittance growth in rippled solenoidal magnetic fields
Emittance growth results due to accelerating gaps, and magnetic field gaps in induction accelerators. The analytic technique previously used to study electric field induced emittance growth for immersed source beams is extended to include solenoid fringing field effects in the present work. These results have application to industrial induction accelerators and to high brightness Free Electron Laser drivers. 1 ref., 2 figs.
Date:
January 1, 1987
Creator:
Adler, R.J.
Object Type:
Article
System:
The UNT Digital Library
Status of the silicon strip vertex detector for the Mark II experiment at the SLC
We are constructing a silicon strip vertex detector to be used in the Mark II detector in the study of Z/sup 0/ decays at the SLAC Linear Collider. The status of the project, including the performance of the individual silicon detector modules, is presented. 6 refs., 8 figs., 2 tabs.
Date:
October 1, 1987
Creator:
Adolphsen, C.; Gratta, G.; Litke, A.; Schwarz, A.; Turala, M.; Breakstone, A. et al.
Object Type:
Article
System:
The UNT Digital Library
Report to users of ATLAS (Argonne Tandem-Line Accelerator System)
The operation and development of ATLAS are reported, including accelerator improvements. Particularly noted is an upgrade to extend the mass range of projectiles up to uranium and to increase the beam intensity by at least two orders of magnitude for all ions. Meetings are discussed, particularly of the Program Advisory Committee and the User Group Executive Committee. Some basic information is provided for users planning to run experiments at ATLAS, including a table of beams available. The data acquisition system for ATLAS, DAPHNE, is discussed, as are the following experimental facilities: the Argonne-Notre Dame Gamma Ray Facility, a proposal submitted for constructing a large-acceptance Fragment Mass Analyzer. Brief summaries are provided of some recent experiments for which data analysis is complete. Experiments performed during the period from June 1, 1986 to January 31, 1987 are tabulated, providing the experiment number, scientists, institution, experiment name, number of days, beam, and energy. (LEW)
Date:
March 1, 1987
Creator:
Ahmad, I. & Glagola, B. (eds.)
Object Type:
Report
System:
The UNT Digital Library