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1,316 Matching Results
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Marriage Enrichment: the Use of Computers to Teach Communication Skills
In this study, a computerized marriage enrichment program that gave couples instruction on communication skills and problem-solving was developed and tested. Couples completed the marriage enrichment courseware together on a computer. Forty couples from a metropolitan area in North Texas volunteered to complete the marriage enrichment courseware. Ten couples were randomly assigned to each of the following four groups: an experimental group that received the pretest followed by treatment and a post-test, a control-wait group that completed pre- and post-tests, an experimental group that received treatment followed by a post-test, and a post-test only control-wait: group. Three hypotheses were generated predicting that experimental subjects would significantly increase their marital communication skills following the treatment and that wives in the pre-test and experimental groups would achieve higher marital communication scores than would husbands. The dependent variable was the score on the Marital Communication Inventory (Bienvenu, 1970). Analyses of variance did not reveal any differences between husbands, wives, and couples at the pre- or post-tests. A three way analysis of variance revealed a significant main effect for treatment (p < .04), but no interaction effects were found. In related findings, a t-test on the post-test minus pre-test difference for wife's scores was …
Date:
May 1989
Creator:
Ramsay, Annetta
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Machines for lattice gauge theory
The most promising approach to the solution of the theory of strong interactions is large scale numerical simulation using the techniques of lattice gauge theory. At the present time, computing requirements for convincing calculations of the properties of hadrons exceed the capabilities of even the most powerful commercial supercomputers. This has led to the development of massively parallel computers dedicated to lattice gauge theory. This talk will discuss the computing requirements behind these machines, and general features of the components and architectures of the half dozen major projects now in existence. 20 refs., 1 fig.
Date:
May 1, 1989
Creator:
Mackenzie, P.B.
Object Type:
Article
System:
The UNT Digital Library
B production in hadron collisions: Theory
A review is presented of heavy quark production in {bar p}p, {pi}{sup -}p, and pp interactions at fixed target and collider energies. Calculations of total cross sections and of single quark inclusive differential cross sections d{sup 2}{sigma}/dk{sub T}dy are described including contributions through next-to-leading order in QCD perturbation theory. Comparisons with available data on charm and bottom quark production show good agreement for reasonable values of the charm and bottom quark masses and other parameters. Predictions and open issues in the interpretation of results are summarized. 20 refs., 5 figs.
Date:
September 28, 1989
Creator:
Berger, E. L.
Object Type:
Article
System:
The UNT Digital Library
Quantum theory and the emergence of patterns in the universe
The topic of this symposium is the quest to discover, define, and interpret patterns in the universe. This quest has two parts. To discover and define these patterns is the task of science: this part of the quest is producing a copious flow of reliable information. To interpret or give meaning to these patterns is the task of natural philosophy: this part has not kept pace.
Date:
November 1, 1989
Creator:
Stapp, H. P.
Object Type:
Article
System:
The UNT Digital Library
Quantum theory and the emergence of patterns in the universe
The topic of this symposium is the quest to discover, define, and interpret patterns in the universe. This quest has two parts. To discover and define these patterns is the task of science: this part of the quest is producing a copious flow of reliable information. To interpret or give meaning to these patterns is the task of natural philosophy: this part has not kept pace.
Date:
November 1, 1989
Creator:
Stapp, H. P.
Object Type:
Article
System:
The UNT Digital Library
Variational theory of nuclear and neutron matter
In these lectures we will discuss attempts to solve the A = 3 to {infinity} nuclear many-body problems with the variational method. We choose the form of a variational wave function {Chi}{sub v}(1, 2{hor ellipsis}A) to describe the ground state. The {Chi}{sub v} and the ground-state energy E{sub v} are obtained by minimizing E{sub v} = {l angle}{Chi}{sub v}{vert bar}H{vert bar}{Chi}{sub v}{r angle}/{l angle}{Chi}{sub v}{vert bar}{Chi}{sub v}{r angle} with respect to variations in {Chi}{sub v}. If the form of the variational wave function is chosen properly we can expect {Chi}{sub v} {approx} {Chi}{sub 0} and E{sub v} {approx} E{sub 0} where {Chi}{sub 0} and E{sub 0} are the exact ground-state wave function and energy. In general E{sub v} {ge} E{sub 0} in variational calculations. 63 refs., 11 figs.
Date:
June 1, 1989
Creator:
Pandharipande, V.R.; Wiringa, R.B. (Illinois Univ., Urbana, IL (USA). Dept. of Physics & Argonne National Lab., IL (USA))
Object Type:
Article
System:
The UNT Digital Library
Assessment of the theory and hypotheses of the acidification of watersheds
This report documents and critically assesses the evolution and status of the scientific understanding of the effects of acidic deposition on surface waters. The main conclusion is that the dominant theory of surface-water acidification fails to adequately incorporate many important factors and processes that influence surface water acidity. Some of these factors and processes are not well researched or recognized as being important by most scientists in the aquatic effects research area. 258 refs., 14 figs., 23 tabs.
Date:
April 1, 1989
Creator:
Krug, E.C.
Object Type:
Report
System:
The UNT Digital Library
Status of glueball mass calculations in lattice gauge theory
The status of glueball spectrum calculations in lattice gauge theory is briefly reviewed, with focus on the comparison between Monte Carlo simulations and small-volume analytical calculations in SU(3). The agreement gives confidence that the large-volume Monte Carlo results are accurate, at least in the context of the pure gauge theory. An overview of some of the technical questions, which is aimed at non-experts, serves as an introduction. 19 refs., 1 fig.
Date:
November 1, 1989
Creator:
Kronfeld, A.S.
Object Type:
Article
System:
The UNT Digital Library
X-ray laser related experiments and theory at Princeton
This paper describes a new system for the development of an x-ray laser in the wavelength region from 5 nm to 1 nm utilizing a Powerful Sub-Picosecond Laser (PP-Laser) of expected peak power up to 0.5 TW in a 300 fs pulse. Soft x-ray spectra generated by the interaction of the PP-Laser beam with different targets are presented and compared to the spectra generated by a much less intense laser beam (20--30 GW). A theoretical model for the interaction of atoms with such a strong laser EM field is also briefly discussed. The development of additional amplifiers for the recombining soft x-ray laser and the design of a cavity are presented from the point of view of applications for x-ray microscopy and microlithography. This overview concludes with the presentation of recent results on the quenching of spontaneous emission radiation and its possible effect on the absolute intensity calibration of soft x-ray spectrometers. 26 refs., 18 figs.
Date:
April 1, 1989
Creator:
Suckewer, S.
Object Type:
Article
System:
The UNT Digital Library
The theory of electron-ion collisions: The role of doubly excited states
The important contributions of doubly excited autoionizing states to electron-impact excitation, ionization, and recombination are reviewed. Various theoretical methods of treating these states are considered, and theoretical cross sections are presented and compared to experimental measurements where available. 28 refs., 8 figs.
Date:
January 1, 1989
Creator:
Griffin, D.C. (Rollins Coll., Winter Park, FL (USA). Dept. of Physics); Pindzola, M.S. (Auburn Univ., AL (USA). Dept. of Physics) & Bottcher, C. (Oak Ridge National Lab., TN (USA))
Object Type:
Article
System:
The UNT Digital Library
What Do You Say After You've Said "I'm Sorry"? The Development of a Measure of Supportive Communication
Missing from extant social support literature is a measure of what support providers say to other individuals with problems. To address this void, a two-stage study focused on the messages of potential support providers and how recipients perceived those messages as Helpful, Comforting, and Appropriate. Responses elicited from subjects (n=587) in Stage I were coded according to content (emotional, cognitive, emotional/cognitive) and given to Stage 2 subjects (n=433) for assessment. The results indicate that supporters and recipients react discriminately according to relationship, problem type, and sex. The Measure of Supportive Communication developed in this study demonstrated better than adequate reliability.
Date:
December 1989
Creator:
Olson, J. Jeanene (Joyce Jeanene)
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Theoria, Volume 4, 1989
Annual journal containing essays, studies, book reviews, and other articles related to the history of Western Music Theory, methods of analysis, and analytical discussions of musical compositions.
Date:
1989
Creator:
McCune, Mark
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
The Voice of the Composer: Theory and Practice in the Works of Pietro Pontio, Volume 1
The life, music, and theoretical writings of Pietro Pontio (1532-1596) yield considerable insight into questions of theory and practice in the late sixteenth century. The dissertation places Pontio within his musical and cultural milieu, and assesses his role as both theorist and composer. Volume Two presents an annotated works list for Pontio's compositions, transcriptions of archival documents used in the study, and transcriptions of representative musical compositions.
Date:
December 1989
Creator:
Murray, Russell Eugene
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Fermilab lattice supercomputer project
The ACPMAPS system is a highly cost effective, local memory MIMD computer targeted at algorithm development and production running for gauge theory on the lattice. The machine consists of a compound hypercube of crates, each of which is a full crossbar switch containing several processors. The processing nodes are single board array processors based on the Weitek XL chip set, each with a peak power of 20 MFLOPS and supported by 8 MBytes of data memory. The system currently being assembled has a peak power of 5 GFLOPS, delivering performance at approximately $250/MFLOP. The system is programmable in C and Fortran. An underpinning of software routines (CANOPY) provides an easy and natural way of coding lattice problems, such that the details of parallelism, and communication and system architecture are transparent to the user. CANOPY can easily be ported to any single CPU or MIMD system which supports C, and allows the coding of typical applications with very little effort. 3 refs., 1 fig.
Date:
February 1, 1989
Creator:
Fischler, M.; Atac, R.; Cook, A.; Deppe, J.; Gaines, I.; Husby, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Proceedings of the Focused Research Program on Spectral Theory and Boundary Value Problems, Vol. 4: Nonlinear Differential Equations
Report on the asymptotic behavior of certain generalized solutions of the problem of the prescribed mean curvature equation.
Date:
August 1989
Creator:
Kaper, H. G.; Kwong, Man Kam & Zettl, Anton
Object Type:
Report
System:
The UNT Digital Library
Proceedings of the Focused Research Program on Spectral Theory and Boundary Value Problems, Vol. 3: Linear Differential Equations and Systems
The third volume of a series of reports containing the proceedings of the Focused Research Program on "Spectral Theory and Boundary Value Problems."
Date:
April 1989
Creator:
Kaper, H. G.; Kwong, Man Kam & Zettl, Anton
Object Type:
Report
System:
The UNT Digital Library
Designing machines for lattice physics and algorithm investigation
Special-purpose computers are appropriate tools for the study of lattice gauge theory. While these machines deliver considerable processing power, it is also important to be able to program complex physics ideas and investigate algorithms on them. We examine features that facilitate coding of physics problems, and flexibility in algorithms. Appropriate balances among power, memory, communications and I/O capabilities are presented. 10 refs.
Date:
October 1, 1989
Creator:
Fischler, M.; Atac, R.; Cook, A.; Deppe, J.; Eichten, E.; Gaines, I. et al.
Object Type:
Article
System:
The UNT Digital Library
Is YbAs a heavy Fermion system
Using parameters extracted from a tight binding fit to an ab initio band structure, the specific heat anomaly observed in YbAs around 5 K is computed within the infinite U limit of the degenerate Anderson impurity model. Applying the renormalization procedure derived in variational treatments of the periodic Anderson model, a quasiparticle Fermi surface with strong nesting features and small mass enhancements is obtained. The results suggest that YbAs is not a classical'' heavy Fermion system. 28 refs., 3 figs., 1 tab.
Date:
August 1, 1989
Creator:
Monnier, R.; Degiorgi, L.; Delley, B.; Koelling, D.D. (Eidgenoessische Technische Hochschule, Zurich (Switzerland). Lab. fuer Festkoerperphysik; Paul Scherrer Inst. (PSI), Villigen (Switzerland) & Argonne National Lab., IL (USA))
Object Type:
Article
System:
The UNT Digital Library
Mean field and collisions in hot nuclei
Collisions between heavy nuclei produce nuclear matter of high density and excitation. Brueckner methods are used to calculate the momentum and temperature dependent mean field for nucleons propagating through nuclear matter during these collisions. The mean field is complex and the imaginary part is related to the ''two-body'' collision, while the real part relates to ''one-body'' collisions. A potential model for the N-N interactions is avoided by calculating the Reaction matrix directly from the T-matrix (i.e., N-N phase shifts) using a version of Brueckner theory previously published by the author. Results are presented for nuclear matter at normal and twice normal density and for temperatures up to 50 MeV. 23 refs., 7 figs.
Date:
June 1, 1989
Creator:
K /umlt o/hler, H.S.
Object Type:
Article
System:
The UNT Digital Library
What is to be done
Steps which can be taken in our scattering theory, unification schemes, cosmology, QED and QCD which will advance the progress of our scientific revolution are presented. 19 refs.
Date:
January 1, 1989
Creator:
Noyes, H. Pierre
Object Type:
Article
System:
The UNT Digital Library
Nuclear decay studies far-from-stability
Nuclear decay studies far-from-stability are performed not merely to characterize new isotopes, but to establish an experimental footing for improving our theoretical understanding of nuclear structure and decay. Although progress has been made in explaining low-lying level structure for a broad range of nuclei, transition probabilities are not yet quantitatively understood. The ability to understand nuclei far-from-stability is important to astrophysics for extending r- and s-process calculations to unknown nuclei, and to nuclear engineering for decay-heat calculations. Finally, by studying nuclei far-from-stability, we probe extremes of both decay energy and proton-neutron ratios where unforeseen and important new nuclear properties may be exhibited. The decays of nearly 100 isotopes and isomers have been studied with the OASIS mass-separation facility on-line at the Lawrence Berkeley Laboratory SuperHILAC. These studies have concentrated on neutron-deficient nuclei with 55{le}Z{le}71 up to A=157 and neutron-rich nuclei with 166{le}A{le}174. The results of these experiments are combined in this paper with those from many other laboratories to provide insight into systematic trends of beta- and {gamma}-ray transition probabilities near N=82. It is hoped that the smooth systematic trends in these transition probabilities will provide clues towards interpreting the underlying nuclear structure. Nuclei near N=82 and Z=64 are expected …
Date:
December 1, 1989
Creator:
Firestone, R.B.; Nitschke, J.M.; Wilmarth, P.A.; Vierinen, K.S.; Chasteler, R.M.; Gilat, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Antoine Reicha's Theories of Musical Form
Antoine Reicha stands as an important figure in the growing systematization of musical form. While Traite de melodie (1814) captures the essence of eighteenth-century concern with tonal movement and periodicity, Reicha's later ideas as represented in Traite de haute composition musicale (1824-26) anticipate descriptions of thematic organization characteristic of his nineteenth-century successors. Three important topics emerge as crucial elements: melody, thematic development, and schematic categorization of complete pieces.
Date:
December 1989
Creator:
McCachren, Jo Renee
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Quasi-electric processes at low energies and their influence on other reaction modes
Quasi-elastic reactions induced by medium-weight projectiles (A=28-80) were measured with good particle resolution using an Enge Split Pole Magnetic Spectrograph. The cross sections for these processes are considerably larger than the ones observed in similar light-ion-induced reactions. The influence of quasi-elastic processes on other reaction modes is discussed. It is found that strong correlations between the various types of reaction exist, requiring a consistent coupled-channels treatment of all reaction modes involved. 46 refs., 14 figs.
Date:
January 1, 1989
Creator:
Rehm, K. E.
Object Type:
Article
System:
The UNT Digital Library
Jet dynamics at the Tevatron collider
Results for processes involving two or more hadronic jets at {radical}s = 1800 GeV are presented. The data are compared with the results predicted from perturbative QCD. 16 refs., 10 figs.
Date:
December 1, 1989
Creator:
Plunkett, R.
Object Type:
Article
System:
The UNT Digital Library