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Stories Told

Description: Listening to someone tell a story is an experience common to all. This is where I drew the idea of Stories Told (Robin Dawes, text) who wants to explore the act of telling. But instead of being a particular story, the text is written in a computer-generated pseudo-language. It is known to give the impression of a real language, but it takes its importance in Told Stories as a signifying word. All listeners, regardless of their language or culture, share the experience of listening to a story told in a foreign language. The text was produced by software programmed by Robin Dawes. His software uses a statistical analysis of the Oxford English language dictionary to produce new words that have the same distribution attribute as the letter combinations of English. These words have been grouped into phonetic classes to create four distinct 'dialects'.
Access: This item is restricted to UNT Community Members. Login required if off-campus.
Date: 13-11-1989
Creator: Scheidt, Daniel J. (Daniel Joseph), 1956-
Partner: UNT Music Library

Church & Synagogue Libraries, Volume XXII, Number 4, January/February 1989

Description: Bimonthly publication of the Church and Synagogue Library Association, containing news and events related to the organization and its members, reviews of books and other materials, and stories of interest to the management of congregational libraries. This issue covers January and February 1989.
Date: 1989-01/1989-02
Creator: Church and Synagogue Library Association
Partner: UNT Libraries Special Collections

[O. J. Curry news article]

Description: An article from The North Texan about O. J. Curry, the founding dean of the College of Business Administration, now College of Business. There is a photo of Curry crouching next to a boat that was taken by Dan Santema. The article focuses on Curry's time as dean, bringing in faculty, growing enrollment, and the college's accreditation. There is also a list of the deans leading up to Jay A. Smith Jr., who was dean at the time of the article's publishing.
Date: 1989~
Creator: Colonna, Pat
Partner: UNT Libraries Special Collections

Quantification of Libby Reservoir Levels Needed to Maintain or Enhance Reservoir Fisheries, 1983-1987 Methods and Data Summary.

Description: Libby Reservoir was created under an International Columbia River Treaty between the United States and Canada for cooperative water development of the Columbia River Basin. The authorized purpose of the dam is to provide power, flood control, and navigation and other benefits. Research began in May 1983 to determine how operations of Libby dam impact the reservoir fishery and to suggest ways to lessen these impacts. This study is unique in that it was designed to accomplish its goal through detailed information gathering on every trophic level in the reservoir system and integration of this information into a quantitative computer model. The specific study objectives are to: quantify available reservoir habitat, determine abundance, growth and distribution of fish within the reservoir and potential recruitment of salmonids from Libby Reservoir tributaries within the United States, determine abundance and availability of food organisms for fish in the reservoir, quantify fish use of available food items, develop relationships between reservoir drawdown and reservoir habitat for fish and fish food organisms, and estimate impacts of reservoir operation on the reservoir fishery. 115 refs., 22 figs., 51 tabs.
Date: December 1, 1989
Creator: Chisholm, Ian
Partner: UNT Libraries Government Documents Department

Calculating coherent pair production with Monte Carlo methods

Description: We discuss calculations of the coherent electromagnetic pair production in ultra-relativistic hadron collisions. This type of production, in lowest order, is obtained from three diagrams which contain two virtual photons. We discuss simple Monte Carlo methods for evaluating these classes of diagrams without recourse to involved algebraic reduction schemes. 19 refs., 11 figs.
Date: January 1, 1989
Creator: Bottcher, C. & Strayer, M. R.
Partner: UNT Libraries Government Documents Department

Engineering Physics and Mathematics Division progress report for period ending August 31, 1989

Description: This paper contains abstracts on research performed at the Engineering Physics and Mathematics Division of Oak Ridge National Laboratory. The areas covered are: mathematical science; nuclear-data measurement and evaluation; intelligent systems; nuclear analysis and shielding; and Engineering Physics Information Center. (LSP)
Date: December 1, 1989
Partner: UNT Libraries Government Documents Department

High spin spectroscopy for odd-Z nuclei with A approx 160

Description: Experimental routhians, alignments, band crossing frequencies, and the B(M1)/B(E2) ratios of the N = 90 isotones and several light Lu (N = 90--96) isotopes are summarized and discussed in terms of shape changes. This systematic analysis shows a neutron- and proton-number dependent quadrupole and {gamma} deformations for these light rare earth nuclei. The stability of the nuclear deformation with respect to {beta} and {gamma} is also found to be particle-number dependent. Such particle-number dependent shapes can be attributed to the different locations of the proton and neutron Fermi levels in the Nilsson diagrams. Configurations dependent shapes are discussed specially concerning the deformation difference between the proton h{sub 9/2} {1/2}{sup {minus}}(541) and the high-K h{sub 11/2} configurations. The observed large neutron band crossing frequencies in the h{sub 9/2} {1/2}{sup {minus}}(541) configuration support the predicted large deformation of this configuration, but can be reproduced by the self-consistent cranked shell model calculation. Lifetime measurement for {sup 157}Ho, one of the nuclei that show such a large {h bar}{omega}{sub c} in the {1/2}{sup {minus}}(541) band, indicates that deformation difference can only account for 20% of such shift in {h bar}{omega}{sub c}. 55 refs., 12 figs.
Date: January 1, 1989
Creator: Yu, C.-H. (Niels Bohr Inst., Copenhagen (Denmark) Tennessee Univ., Knoxville, TN (USA). Dept. of Physics and Astronomy); Gascon, J.; Hagemann, G. B. (Niels Bohr Inst., Copenhagen (Denmark)) & Garrett, J. D. (Niels Bohr Inst., Copenhagen (Denmark) Oak Ridge National Lab., TN (USA))
Partner: UNT Libraries Government Documents Department

Protection of Wild Adult Steelhead in Idaho by Adipose Fin Removal: 1985-1988 Final Report.

Description: Steelhead trout reared in Idaho hatcheries for release during the 1984--1988 outmigrations were adipose fin clipped to differentiate between wild/natural and hatchery-reared fish. From 1984--1988, 34 million hatchery-reared steelhead trout were clipped and 30.1 million were released; the difference being made up by hatchery mortality and the percent of acceptable clips. Since 1987, the adipose clip has given protection to all wild/natural steelhead and identified them from hatchery stocks. 135 refs.
Date: April 1, 1989
Creator: Duke, Rodney C.
Partner: UNT Libraries Government Documents Department

LAr calorimeter for SCC with a common vacuum bulkhead---a concept to improve hermeticity

Description: A new concept for a Barrel/Endcap LAr Calorimeter (LAC) is described in which the Barrel and Endcaps are in separate vacuum enclosures but share a common vacuum bulkhead (CVB). We explore 2 possible bulkhead construction types; welded plate sandwich panels, and brazed sandwich panels in which the core is an isotropic cellular solid--foamed aluminum. Gas lines and electric cables from he innermost Drift Chamber pass through radial holes in the core of the sandwich bulkhead. The CVB concept offers the potential to obtain a more hermetic calorimeter with significantly reduced dead material and/or space in the interface region common to conventional design LAr detectors for the SSC with Endcap features. To utilize a common additional steps to remove the Drift Chamber, a large increase in Endcap standby heat leak, and perhaps, new cryogenic safety issues. We find that significant amount of dead mass can be removed from critical regions of the vacuum shells when compared to a promising SSC LAC reference design. It is also shown that the increased standby heat leak of this concept can be easily removed by existing cooling capacity in another large LAr calorimeter. It is further shown that shut-downs need not be appreciably longer. Finally, it is argued that cryogen spill hazards can be avoided if the Endcap's LAr is removed during Drift chamber maintenance shutdowns, and that cryogenic safety is not compromised.
Date: November 1, 1989
Creator: Pope, W. L. (Lawrence Berkeley Lab., CA (USA)) & Watt, R. D. (Stanford Linear Accelerator Center, Menlo Park, CA (USA))
Partner: UNT Libraries Government Documents Department

Symposium on high temperature and materials chemistry

Description: This volume contains the written proceedings of the Symposium on High Temperature and Materials Chemistry held in Berkeley, California on October 24--25, 1989. The Symposium was sponsored by the Materials and Chemical Sciences Division of Lawrence Berkeley Laboratory and by the College of Chemistry of the University of California at Berkeley to discuss directions, trends, and accomplishments in the field of high temperature and materials chemistry. Its purpose was to provide a snapshot of high temperature and materials chemistry and, in so doing, to define status and directions.
Date: October 1, 1989
Partner: UNT Libraries Government Documents Department

Tunable far infrared laser spectroscopy of van der Waals bonds: Ar-NH sub 3

Description: Hyperfine resolved vibration-rotation-tunneling spectra of Ar--NH{sub 3} and (NH{sub 3}){sub 2}, generated in a planar supersonic jet, have been measured with the Berkeley tunable far infrared laser spectrometer. Among the seven rotationally assigned bands, one band belongs to Ar--NH{sub 3}, and the other six belong to (NH{sub 3}){sub 2}. To facilitate the intermolecular vibrational assignment for Ar--NH{sub 3}, a dynamics study aided by a permutation-inversion group theoretical treatment is performed on the rovibrational levels. The rovibrational quantum number correlation between the free internal rotor limit and the semi-rigid limit is established to provide a basic physical picture of the evolution of intermolecular vibrational component states. An anomalous vibronically allowed unique Q branch vibrational band structure is predicted to exist for a near prolate binary complex containing an inverting subunit. According to the model developed in this work, the observed band of Ar--NH{sub 3} centered at 26.470633(17) cm{sup {minus}1} can correlate only to either the fundamental dimeric stretching band for the A{sub 2} states with the NH{sub 3} inversional quantum number v{sub i} = 1, or the K{sub a} = 0 {l arrow} 0 subband of the lowest internal-rotation-inversion difference band. Although the estimated nuclear quadrupole coupling constant favors a tentative assignment in terms of the first possibility, a definitive assignment will require far infrared data and a dynamical model incorporating a potential surface.
Date: November 1, 1989
Creator: Gwo, Dz-Hung (Lawrence Berkeley Lab., CA (USA) California Univ., Berkeley, CA (USA). Dept. of Chemistry)
Partner: UNT Libraries Government Documents Department

The Beam Break-Up Numerical Simulator

Description: Beam Break-Up (BBU) is a severe constraint in accelerator design, limiting beam current and quality. The control of BBU has become the focus of much research in the design of the next generation collider, recirculating and linear induction accelerators and advanced accelerators. Determining the effect on BBU of modifications to cavities, the focusing elements or the beam is frequently beyond the ability of current analytic models. A computer code was written to address this problem. The Beam Break-Up Numerical Simulator (BBUNS) was designed to numerically solve for beam break-up (BBU) due to an arbitrary transverse wakefield. BBUNS was developed to be as user friendly as possible on the Cray computer series. The user is able to control all aspects of input and output by using a single command file. In addition, the wakefield is specified by the user and read in as a table. The program can model energy variations along and within the beam, focusing magnetic field profiles can be specified, and the graphical output can be tailored. In this note we discuss BBUNS, its structure and application. Included are detailed instructions, examples and a sample session of BBUNS. This program is available for distribution. 50 refs., 18 figs., 5 tabs.
Date: November 1, 1989
Creator: Travish, G. A.
Partner: UNT Libraries Government Documents Department

Reaction of Tris(cyclopentadienyl)uranium compounds with amines, azides, and related ligands

Description: The trivalent uranium compound, (MeC{sub 5}H{sub 4}){sub 3}U(thf), serves as a one- or two-electron reducing agent towards azides, RN{sub 3}. These reactions produce either the uranium(IV) azide, (MeC{sub 5}H{sub 4}){sub 3}UN{sub 3}, or uranium(V) imides, (MeC{sub 5}H{sub 4}){sub 3}UNR. The role of steric and electronic effects upon this reaction has been investigated using several series of azides. For Me{sub 3}XN{sub 3}, the imides are produced when X = C or Si, both products are formed when X = Ge, and the azide is produced when X = Sn. For Ph{sub 3}XN{sub 3}, the azide is produced when X = C or Sn. For Ph{sub 3-x}CH{sub 3}N{sub 3}, the imide is produced when x = 2 and both compounds are produced when x = 1. For substituted phenylazides, RC{sub 6}H{sub 4}N{sub 3}, only the imides are produced. The magnetic properties of uranium diimides, ((MeC{sub 5}H{sub 4}){sub 3}U){sub 2}({mu}-NRN), were investigated. Several uranium(III) amines, (MeC{sub 5}H{sub 4}){sub 3}U(NH{sub 2}R), were produced from (MeC{sub 5}H{sub 4}){sub 3}U(thf) and RNH{sub 2}, and NH{sub 3} was found to be a better ligand towards (MeC{sub 5}H{sub 4}){sub 3}U than is PMe{sub 3}.
Date: December 1, 1989
Creator: Rosen, Robert Keith
Partner: UNT Libraries Government Documents Department

Study of collective effects for the APIARY collider

Description: The design of a high-luminosity electron-positron collider to study B-physics is a challenging task from many points of view. In this paper we consider the influence of collective effects on the machine performance; most of our findings are generic,'' in the sense that they depend rather weakly on the details of the machine design. Based upon an example machine design (APIARY-II), we investigate single-bunch thresholds for the longitudinal microwave and transverse mode-coupling instabilities, examine the possibility of emittance growth from intrabeam scattering, calculate the beam lifetime from Touschek scattering and gas scattering, and estimate the growth rates for both longitudinal and transverse coupled-bunch instabilities. We find that the single-bunch instabilities should not lead to difficulty, and that the emittance growth is essentially negligible. At a background gas pressure of 10 nTorr, beam lifetimes of only a few hours are expected, which will place a burden on the injection system if a high average luminosity is to be maintained. Even this lifetime is likely to require an innovative design for the vacuum system to maintain a pressure of 10 nTorr in the presence of a circulating electron or positron beam of approximately 1 A. With a standard PEP-like multicell rf system, multibunch growth rates are very severe, especially in the longitudinal plane. There appear to be significant benefits to a radically different rf system design, either utilizing superconducting single-cell rf cavities, or cavities with equivalent geometrical shapes but operated at room temperature. Even then, a powerful feedback system will likely be required. Nonetheless, it does not appear that there are any fundamental problems that stand in the way of successfully designing and building such a high-luminosity B-Factory. 13 refs., 9 figs., 5 tabs.
Date: September 1, 1989
Creator: Zisman, Michael S.
Partner: UNT Libraries Government Documents Department

A small low energy cyclotron for radioisotope measurements

Description: Direct detection of {sup 14}C by accelerator mass spectrometry has proved to be a much more sensitive method for radiocarbon dating than the decay counting method invented earlier by Libby. A small cyclotron (the cyclotrino'') was proposed for direct detection of radiocarbon in 1980. This combined the suppression of background through the use of negative ions, which had been used effectively in tandem accelerators, with the high intrinsic mass resolution of a cyclotron. Development of a small electrostatically-focused cyclotron for use as a mass spectrometer was previously reported but the sensitivity needed for detection of {sup 14}C at natural abundance was not achieved. The major contributions of this work are the integration of a high current external ion source with a small flat-field, electrostatically-focused cyclotron to comprise a system capable of measuring {sup 14}C at natural levels, and the analysis of ion motion in such a cyclotron, including a detailed analysis of phase bunching and its effect on mass resolution. A high current cesium sputter negative ion source generates a beam of carbon ions which is pre-separated with a Wien filter and is transported to the cyclotron via a series of electrostatic lenses. Beam is injected radially into the cyclotron using electrostatic deflectors and an electrostatic mirror. Axial focusing is entirely electrostatic. A microchannel plate detector is used with a phase-grated output. In its present form the system is capable of improving the sensitivity of detecting {sup 14}C in some biomedical experiments by a factor of 10{sup 4}. Modifications are discussed which could bring about an additional factor of 100 in sensitivity, which is important for archaeological and geological applications. Possibilities for measurements of other isotopes, such as {sup 3}H, and {sup 10}Be, and {sup 26}Al, are discussed. 70 refs.
Date: November 1, 1989
Creator: Bertsche, Kirk Joseph
Partner: UNT Libraries Government Documents Department

W sup + W sup minus interactions and the search for the Higgs boson

Description: Since the original paper by Peter Higgs in 1964, which was only a page and a half long, the number of publications on the topic of the Higgs particle has grown year by year and threatens to overwhelm us. If only for this reason it has become imperative that we find the Higgs. In this lecture series we will begin with a general review of the standard model Higgs and a summary of existing experimental limits on Higgs masses. We will then discuss Higgs searches at e{sup +}e{sup {minus}} machines which are just coming on line, e.g. SLC and LEP, and proceed to work our way up to TLC, CLIC, and the SSC, where we will introduce the topic of W{sup +}W{sup {minus}} interactions. The range of Higgs masses we cover will span six orders of magnitude from MeV to TeV. Non-minimal Higgs searches will not be dealt with in this lecture series; instead see the excellent theoretical reviews of both minimal and non-minimal model Higgs. 55 refs., 51 figs., 20 tabs.
Date: July 1, 1989
Creator: Levi, Michael E.
Partner: UNT Libraries Government Documents Department

Symmetry violations and rare decays

Description: This constitutes the report of the working group on symmetry violations and rare decays. The next generation of CP violating kaon decay experiments (the 2{pi} and {pi}{sup 0}e{sup +}e{sup {minus}} modes) were considered at the Tevatron and at the proposed Main Injector, effectively building upon the work of the earlier Fermilab Workshop on Physics at the Main Injector. The optimizations for the electromagnetic calorimeter and for background rejection are treated in some detail. Very precise CPT tests in the 2{pi} decay modes are also treated. A sensitive experiment looking for flavor violation at the Main Injector (K{sub L} {yields} {mu}e) is discussed. The significant advantages of possible stretcher and prebooster rings are mentioned. 27 refs., 5 figs., 3 tabs.
Date: January 1, 1989
Creator: Coleman, R.; Bock, G.; Enagonio, J.; Hsiung, B.; Yamanaka, T. (Fermi National Accelerator Lab., Batavia, IL (USA)); Winstein, B. et al.
Partner: UNT Libraries Government Documents Department

Technical assessment of the Loma Linda University proton therapy accelerator

Description: In April 1986, officials of Loma Linda University requested that Fermilab design and construct a 250 MeV proton synchrotron for radiotherapy, to be located at the Loma Linda University Medical Center. In June 1986 the project, having received all necessary approvals, commenced. In order to meet a desirable schedule providing for operation in early 1990, it was decided to erect such parts of the accelerator as were complete at Fermilab and conduct a precommissioning activity prior to the completion of the building at Loma Linda which will house the final radiotherapy facility. It was hoped that approximately one year would be saved by the precommissioning, and that important information would be obtained about the system so that improvements could be made during installation at Loma Linda. This report contains an analysis by Fermilab staff members of the information gained in the precommissioning activity and makes recommendations about steps to be taken to enhance the performance of the proton synchrotron at Loma Linda. In the design of the accelerator, effort was made to employ commercially available components, or to industrialize the products developed so that later versions of the accelerator could be produced industrially. The magnets could only be fabricated at Fermilab if the schedule was to be met, but efforts were made to transfer that technology to industry. Originally, it was planned to use a 1.7 MeV RFQ fabricated at the Lawrence Berkeley Laboratory as injector, but LBL would have found it difficult to meet the project schedule. After consideration of other options, for example a 3.4 MeV tandem accelerator, a supplier (AccSys Inc.) qualified itself to provide a 2 MeV RFQ on a schedule well matched to the project schedule. This choice was made, but a separate supplier was selected to develop and provide the 425 MHz power amplifier ...
Date: October 1, 1989
Partner: UNT Libraries Government Documents Department

Intrabeam scattering in the Tevatron collider upgrade

Description: This report explores the effects of intrabeam scattering on the integrated luminosity for some conditions under consideration for the early stages of the Tevatron collider upgrade. This report concludes that intrabeam scattering effects, although they are hoped to become clearly visible, are not expected to wash out gains made by lowering {beta}* and emittances. It is not the intent of this report to provide a physics tutorial on intrabeam scattering. However, a bibliography is provided at the end of this report which may be of use in that regard. 14 figs.
Date: December 4, 1989
Creator: Finley, D.
Partner: UNT Libraries Government Documents Department

Hadron production in relativistic heavy ion interactions and the search for the quark-gluon plasma

Description: The course starts with an introduction, from the experimentalist's point of view, of the challenge of measuring Relativistic Heavy Ion interactions. A review of some theoretical predictions for the expected signatures of the quark gluon plasma will be made, with a purpose to understand how they relate to quantities which may be experimentally measured. A short exposition of experimental techniques and details is given including charged particles in matter, momentum resolution, kinematics and Lorentz Transformations, calorimetry. Principles of particle identification including magnetic spectrometers, time of flight measurement. Illustrations using the E802 spectrometer and other measured results. Resolution smearing of spectra, and binning effects. Parent to daughter effects in decay, with {pi}{sup 0} {yields} {gamma} {gamma} as an example. The experimental situation from the known data in p -- p collisions and proton-nucleus reactions is reviewed and used as a basis for further discussions. The Cronin Effect'' and the Seagull Effect'' being two arcana worth noting. Then, selected experiments from the BNL and CERN heavy ion programs are discussed in detail. 118 refs., 45 figs.
Date: December 1, 1989
Creator: Tannenbaum, M. J.
Partner: UNT Libraries Government Documents Department

Physical sputtering of metallic systems by charged-particle impact

Description: The present paper provides a brief overview of our current understanding of physical sputtering by charged-particle impact, with the emphasis on sputtering of metals and alloys under bombardment with particles that produce knock-on collisions. Fundamental aspects of ion-solid interactions, and recent developments in the study of sputtering of elemental targets and preferential sputtering in multicomponent materials are reviewed. We concentrate only on a few specific topics of sputter emission, including the various properties of the sputtered flux and depth of origin, and on connections between sputtering and other radiation-induced and -enhanced phenomena that modify the near-surface composition of the target. The synergistic effects of these diverse processes in changing the composition of the integrated sputtered-atom flux is described in simple physical terms, using selected examples of recent important progress. 325 refs., 27 figs.
Date: December 1, 1989
Creator: Lam, N. Q.
Partner: UNT Libraries Government Documents Department

Progress in the CW operation of a 140 GHz gyrotron

Description: Tests on a 140 GHz, whispering-gallery-mode gyrotron have resulted in short-pulse power levels of 820 kW and average power levels of 81 kW. Tests are currently underway on a new tube with the goal of achieving an ouput power of 400 kW CW. 1 ref.
Date: September 1, 1989
Creator: Felch, K.; Jongewaard, E.; Jory, H.; Hess, C.; Huey, H.; Neilson, J. et al.
Partner: UNT Libraries Government Documents Department

Activation of methane by transition metal-substituted aluminophosphate molecular sieves

Description: Recent experiments in our laboratory have demonstrated that aluminophosphate molecular sieves substituted with cobalt and cobalt/silicon combinations and having the AlPO{sub 4}-34 or AlPO{sub 4}-5 structure activate methane starting at {approximately}350{degree}C. Between 400 and 500{degree}C the rate of methane conversion increases steadily with typical conversion efficiencies at 500{degree}C ranging from 15 to 60%. The cobalt and silicon substituted AlPO{sub 4}-34 structure (CoAPSO-34) produces ethylene, ethane, propylene, and propane in varying proportions, depending on reactions conditions. The cobalt-substituted AlPO{sub 4}-5 (CoAPSO-5) produces propylene in very high yield with ethane, ethylene, and propane also seen. Analogous aluminophosphate molecular sieves substituted with magnesium or silicon, but containing no transition metal (e.g., SAPO-34, MAPO-5), do not activate methane under the conditions described above. The activation mechanism is based on reduction of the cobalt(III) form of the molecular sieve to the cobalt(II) form with accompanying oxidative dehydrogenation of the methane. Reoxidation of the cobalt(II) for to the cobalt(III) form can be done either chemically (e.g., using O{sub 2}) or electrochemically. 7 refs., 2 figs., 1 tab.
Date: December 1, 1989
Creator: Maroni, V A; Willms, K A; Nguyen, Hiephoa & Iton, L E
Partner: UNT Libraries Government Documents Department

BNL high energy heavy ion experiments

Description: This paper discusses the measurement of particle spectra and correlations with good particle identification and with various triggers, such as selection of charged multiplicity, neutral energy and forward energy.
Date: January 1, 1989
Creator: Miake, Yasuo.
Partner: UNT Libraries Government Documents Department