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Gauge invariant description of heavy quark bound states in quantum chromodynamics

Description: A model for a heavy quark meson is proposed in the framework of a gauge-invariant version of quantum chromodynamics. The field operators in this formulation are taken to be Wilson loops and strings with quark-antiquark ends. The fundamental differential equations of point-like Q.C.D. are expressed as variational equations of the extended loops and strings. The 1/N expansion is described, and it is assumed that nonleading effects such as intermediate quark pairs and nonplanar gluonic terms can b… more
Date: August 1, 1980
Creator: Moore, S. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Quantum cosmology on the worldsheet

Description: Two-dimensional quantum gravity coupled to conformally invariant matter central c > 25 provides a toy model for quantum gravity in four dimensions. Two-dimensional quantum cosmology can thus be studied in terms of string theory in background fields. The large scale cosmological constant depends on non-linear dynamics in the string theory target space and does not appear to be suppressed by wormhole effects. 13 refs.
Date: August 1, 1991
Creator: Cooper, A.R.; Susskind, L. & Thorlacius, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Theoretical particle physics. Progress report, December 1, 1079-November 30, 1980. [Physics Dept. , Indiana Univ]

Description: Work during the past year ranged from phenomenological studies of various quark systems to applications of quantum chromodynamics and lattice gauge theories. On the phenomenological side for mesons, studies of the charmonium and bottomonium families as well as the spectrum of states containing a single b-quark continued. As a result of some improved measurements, the topic of baryon magnetic moments was reconsidered. At the same time the properties of highly excited 3-quark systems were conside… more
Date: August 1, 1980
Creator: Hendry, A.W.; Lichtenberg, D.B. & Weingarten, D.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Two aspects of one loop structure: Unitarity delay in the Standard Model and modular invariance in string theory

Description: We study two aspects of one loop structures in quantum field theories which describe two different areas of particle physics: the one loop unitarity behavior of the Standard Model of electroweak interactions and modular invariance of string model theory. Loop expansion has its importance in that it contains quantum fluctuations due to all physical states in the theory. Therefore, by studying the various models to one loop, we can understand how the contents of the theory can contribute to physi… more
Date: August 1, 1989
Creator: Ahn, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Symmetry breaking: The standard model and superstrings

Description: The outstanding unresolved issue of the highly successful standard model is the origin of electroweak symmetry breaking and of the mechanism that determines its scale, namely the vacuum expectation value (vev)v that is fixed by experiment at the value v = 4m//sub w//sup 2///g/sup 2/ = (..sqrt..2G/sub F/)/sup /minus/1/ approx. = 1/4 TeV. In this talk I will discuss aspects of two approaches to this problem. One approach is straightforward and down to earth: the search for experimental signatures… more
Date: August 31, 1988
Creator: Gaillard, M. K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Anomalies

Description: Anomalies have a diverse impact on many aspects of physical phenomena. The role of anomalies in determining physical structure from the amplitude for decay to the foundations of superstring theory will be reviewed. 36 refs.
Date: August 1, 1985
Creator: Bardeen, W.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Phase transitions as the origin of large scale structure in the universe

Description: A review of the formation of large scale structure through gravitational growth of primordial perturbations is given. This is followed by a discussion of how symmetry breaking phase transitions in the early universe might have produced the required perturbations, in particular through the formation and evolution of a network of cosmic strings. Finally the statistical mechanics of string networks, for both cosmic and fundamental strings is discussed, leading to some more speculative ideas on the… more
Date: August 1, 1988
Creator: Turok, N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Twisted strings and orbifolds

Description: Orbifold compactifications provide a practical approach to string symmetry breaking. They have the potential to bridge the gap between string theory and the physics of the standard model. 7 refs., 5 figs.
Date: August 1, 1986
Creator: Bagger, J. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Error analysis in wind turbine field testing

Description: In wind turbine field testing, one of the most important issues is understanding and accounting for data errors. Extended dynamic testing of wind turbines requires a thorough uncertainty analysis and a regimen of quality assurance steps in order to preserve accuracy. Test objectives need to be identified to determine the accuracy requirements of any data measurement, collection, and analysis process. Frequently, the uncertainty analysis reveals that the major sources of error can be allowed for… more
Date: August 1, 1994
Creator: McNiff, B & Simms, D
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Creating Musical Momentum: Textural and Timbral Sculpting with Intuitive Compositional Systems and Formal Design

Description: This dissertation explores the analysis and creation of compositions from the standpoint of texture and momentum. It is comprised of four chapters. The first presents a number of concepts as tools for analysis, including textural typography and transformation, perception of time and psychological engagement of an audience, and respiration as a metaphor for musical momentum. The second and third chapters apply these tools to Gerard Grisey's "Periodes" and "Partiels," and Brian Ferneyhough's "Lem… more
Date: August 2016
Creator: Robin, Brad
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Extended defects in as-grown CdZnTe

Description: We characterized samples cut from different locations in as-grown CdZnTe (CZT) ingots, using Automated Infrared (IR) Transmission Microscopy and White Beam X-ray Diffraction Topography (WBXDT), to locate and identify the extended defects in them. Our goal was to define the distribution of these defects throughout the entire ingot and their effects on detectors’ performance as revealed by the pulse-height spectrum. We found the highest- and the lowest- concentration of Te inclusions, respectivel… more
Date: August 1, 2010
Creator: Xu, L.; Bolotnikov, A. E.; Hossain, A.; Kim, K. H.; Gul, R.; Yang, G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Extended String Techniques and Special Effects in Arnold Schoenberg's String Quartet No. 1 and Its Significance in Chamber Music Literature

Description: Arnold Schoenberg's String Quartet No. 1, Op. 7 stands out as being the first chamber music piece to use a vast number and variety of extended string techniques within one composition. This paper examines a brief history of extended string techniques in chamber music, analyses the unique ways in which Schoenberg applied extended string techniques to manipulate motives in his Op. 7 quartet, and ultimately shows that Schoenberg's use of extended string techniques influenced future composers to em… more
Date: August 2017
Creator: Greenfield, Leah
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Attitudes of Selected Authorities Toward Policy Statements Relative to School-Municipal Recreation Cooperation

Description: This study seeks to determine the attitudes of public school and municipal recreation authorities in the state of Texas with respect to policies pertaining to the joint acquisition, planning and development, and use of school areas and facilities for school and recreational use. This study has a twofold purpose. The first is to determine the attitudes of selected public school and municipal recreation authorities toward certain policy statements pertaining to the joint acquisition, planning and… more
Date: August 1973
Creator: Atkinson, Ralph Henry, 1933-
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Importance of being topologically excited

Description: A class of Euclidean configurations that appear to be dominant in the functional integral of the CP/sup N-1/ models is identified. These configurations are point-like topological excitations, and they may be viewed as constituents of instantons, although they are defined independently of instantons through a continuum duality transformation. Not only do these configurations survive as N ..-->.. infinity, but in the plasma phase they are responsible for the effects encountered within the 1/N exp… more
Date: August 1, 1980
Creator: Caldi, D. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department

Implementing the Extended Date/Time Format in Digital Collections

Description: Presentation for the 2013 Cross Timbers Library Collaborative (CTLC) Conference. This presentation discusses the implementation of the Extended Date/Time Format (EDTF) within the University of North Texas (UNT) digital collections. It includes a summary of the kinds of date formats in the EDTF with examples from the digital collections, a description of methods used to implement and utilize the machine-readability of the format, and an overview of reasons that other institutions may want to con… more
Date: August 16, 2013
Creator: Tarver, Hannah
Item Type: Refine your search to only Presentation
Partner: UNT Libraries
open access

Computational Studies of Bonding and Phosphorescent Properties of Group 12 Oligomers and Extended Excimers.

Description: Density functional (ca, BLYP, BPW91, B3LYP and B3PW91), MP2 and CCSD(T) methods in combination with LANL2DZ or cc-pVxZ-PP (where x=D(double), T(triple) Q(quadruple), and 5(quintuple)) basis sets have been employed in computing electronic transition energies of zinc and cadmium monomers. CCSD(T)/aug-cc-pV5Z-PP combination finds values that are 150 cm-1 from the experimental value for the zinc monomer and 240 cm-1 remove from the cadmium monomer excitation experimental value. These method/bas… more
Date: August 2008
Creator: Determan, John J.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Extended performance techniques and compositional style in the solo concert vibraphone music of Christopher Deane.

Description: Vibraphone performance continues to be an expanding field of music. Earliest accounts of the presence of the vibraphone and vibraphone players can be found in American Vaudeville from the early 1900s; then found shortly thereafter in jazz bands as early as the 1930s, and on the classical concert stage beginning in 1949. Three Pieces for Vibraphone, Opus 27, composed by James Beale in 1959, is the first solo concert piece written exclusively for the instrument. Since 1959, there have been over 6… more
Date: August 2008
Creator: Smith, Joshua D.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A Conductor's Guide to Harrison Birtwistle's Entr'actes and Sappho Fragments

Description: Entr'actes and Sappho Fragments (1964) by English Composer Harrison Birtwistle represent extended notation, complex meters, and extended instrumental techniques. After World War II, the style and techniques of musical composition evolved considerably and musical trends began to continuously change. Conducting contemporary compositions requires new approaches in conducting methods. This paper examines a) introduce important elements of Birtwistle's compositions in the 1960, b) include an updated… more
Date: August 2019
Creator: Jang, Hyeyoun
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Crystal Clear: A Performance Guide and Electronic Accompaniment of Mario Lavista's Marsias for Oboe and Crystal Glasses

Description: Mario Lavista (b. 1943) is a dominant figure in Mexican classical music. In the second half of the twentieth century, he promoted the use of contemporary techniques, leading to a series of collaborations with expert instrumentalists to explore extended techniques. Marsias for Oboe and Crystal Glasses is one of those pieces. Due to the nature of contemporary techniques, different oboes and reed styles produce different effects with the same fingerings. This document analyzes the contemporary fin… more
Date: August 2019
Creator: Thompson, Jonathan (Oboist)
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

A Comparison of File Organization Techniques

Description: This thesis compares the file organization techniques that are implemented on two different types of computer systems, the large-scale and the small-scale. File organizations from representative computers in each class are examined in detail: the IBM System/370 (OS/370) and the Harris 1600 Distributed Processing System with the Extended Communications Operating System (ECOS). In order to establish the basic framework for comparison, an introduction to file organizations is presented. Additional… more
Date: August 1977
Creator: Rogers, Roy Lee
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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