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Measurement of the Electric and Magnetic Elastic Structure Functions of the Deuteron at Large Momentum Transfers

Description: The deuteron elastic structure functions, A(Q{sup 2}) and B(Q{sup 2}), have been extracted from cross section measurements of elastic electron-deuteron scattering in coincidence using the Continuous Electron Beam Accelerator and Hall A Facilities of Jefferson Laboratory. Incident electrons were scattered off a high-power cryogenic deuterium target. Scattered electrons and recoil deuterons were detected in the two High Resolution Spectrometers of Hall A. A(Q{sup 2}) was extracted from forward angle cross section measurements in the squared four-momentum transfer range 0.684 ≤ Q{sup 2} ≤ 5.90 (GeV/c){sup 2}. B(Q{sup 2}) was determined by means of a Rosenbluth separation in the range 0.684 ≤ Q{sup 2} ≤ 1.325 (GeV/c){sup 2}. The data are compared to theoretical models based on the impulse approximation with the inclusion of meson-exchange currents and to predictions of quark dimensional scaling and perturbative quantum chromodynamics. The results are expected to provide insights into the transition from meson-nucleon to quark-gluon descriptions of the nuclear two-body system.
Date: October 1, 1999
Creator: Suleiman, Riad
Partner: UNT Libraries Government Documents Department

Measurement of the deuteron elastic structure functions at large momentum transfers

Description: The cross section for elastic electron-deuteron scattering has been measured using the Hall A Facility of Jefferson Laboratory. Scattered electrons and recoiling deuterons were detected in coincidence in the two 4 GeV/c High Resolution Spectrometers (HRS) of Hall A. The deuteron elastic structure functions A(Q{sup 2}) and B(Q{sup 2}) have been extracted from these data. Results for the measurement of A(Q{sup 2}) in the range of 0.7 ≤ Q{sup 2} ≤ 6.0 (GeV/c){sup 2} are reported. Results for the magnetic structure function, B(Q{sup 2}), are presented in the range of 0.7 ≤ Q{sup 2} ≤ 1.35 (GeV/c){sup 2}. The results for both structure functions are compared to predictions of meson-nucleon based models, both with and without the inclusion of meson-exchange currents. The A(Q{sup 2}) results are compared to predictions of the dimensional scaling quark model and perturbative quantum chromodynamics. The results can provide insights into the transition from meson-nucleon to quark-gluon descriptions of the nuclear two-body system.
Date: August 1, 1999
Creator: McCormick, Kathy
Partner: UNT Libraries Government Documents Department

Study of Quasielastic 1p-shell proton Knockout in the {sup 16}O (e,e'p) reaction at Q{sup 2}=0.8 (GeV/c){sup 2}

Description: Coincidence cross sections and the structure functions R{sub L+TT},#2; R{sub T} and R{sub LT} have been obtained for the quasielastic #2;#3;{sup 16}O(#7;e,#2; e'p)#8; reaction with the proton knocked out from the #2;1p{sub 1/2}#2;#2;#4; and #2;1p{sub 3/2}#5;#2;#4; states in perpendicular kinematics. The nominal energy transfer #3;{omega} was 439#11; MeV#4; the nominal Q{sup 2}#4; was 0.8 (#7;GeV/#14;c){sup 2}#8;#4; and the kinetic energy of knocked-#15;out proton was 427#3;#16; MeV. The data was taken in Hall A#4; Je#17;erson Laboratory#4; using two high resolution spectrometers to detect electrons and protons respectively. Nominal beam energies 845#18; MeV#4;, #2;#19;1645#18; MeV#4; and #3;2445#18; MeV were employed. For each beam energy,#4; the momentum and angle of electron arm were #6;fixed,#4; while the angle between the proton momentum and the momentum transfer {vector #4;q} was varied to map out the missing momentum. R{sub LT} was separated out to ~350 MeV#14;/c in missing momentum. R{sub L+TT} and R{sub T} were separated out to #2;#3;~280 MeV/#14;c in missing momentum. R{sub L} and R{sub T} were separated at a missing momentum of #18;#3;52.5#18; MeV/#14;c for the data taken with hadron arm along #4;{vector q}. The measured cross sections and response functions agree with both relativistic and non#15;relativistic DWIA calculations employing spectroscopic factors between #19;60-75% for 1#2;p{sub 1/2}#2;#2;#4; and 1#2;p{sub 3/2}#5;#2;#4; states. The left-#15;right asymmetry does not support the non#15;-relativistic DWIA calculation using the Weyl gauge. Also#4; the left-#15;right asymmetry measurement favors the relativistic calculation. This thesis describes the details of the experimental setup#4;, the calibration of the spectrometers,#4; the techniques used in the data analysis to derive the fi#6;nal cross sec#15;tions as well as the response functions#4; and the comparison of the results with the theoretical calculations.
Date: June 1, 1999
Creator: Gao, Juncai
Partner: UNT Libraries Government Documents Department

A study of the {sup 16}O (e, e'p) reaction at deep missing energies

Description: The {sup 16}O(e,e'p)#8; reaction was studied in the #6;first physics experiment performed at Jefferson lab Hall A. In the quasielastic region cross sections were measured for both quasi#11;parallel and perpendicular kinematics at q = 1000 MeV and #2;{omega} = 445#14;#14;#15; MeV. From the data acquired in quasi#11;parallel kinematics#4; longitudinal and transverse response functions#4; R{sub L} and R{sub T} were separated for E{sub miss} < 60 MeV. The perpendicular kinematics data were used to extract R{sub LT}, #4; R{sub T},#4; and R{sub L#16;} + V{sub TT}/V{sub L}R{sub TT} response functions for the same E{sub miss} range and for P{sub miss} < 310 MeV#18;c. The {sub 16}O(#7;e,#4;e'p)#8; cross section was measured in the dip region at q = 1026 MeV and #2; {omega} = 586#12;#15;#19;#2; MeV for 10 MeV <#3; E{sub miss} < 320 MeV. This thesis presents the results for the missing energy continuum (#7;E{sub miss}>25#4; #3;#15; MeV)#8; from this experiment.
Date: February 1, 1999
Creator: Liyanage, Nilanga
Partner: UNT Libraries Government Documents Department

How to practice in an efficient way

Description: The purpose of this thesis was to understand the nature of practice and to develop a suggested practice routine which incorporates both technical and musical aspects. Two recommendations, strategies toward effective practice and an ideal practice session, serve as a outline and reference for both piano teacher and student.
Date: May 1999
Creator: Hu, Shu-Chen
Partner: UNT Libraries

A model of salespeople's training attitudes and related outcomes

Description: This program of research will identify and evaluate a salesperson's attitudes toward sales training and the influences of training perceptions on salesperson's behaviors and general attitudes. As well, a relationship between transfer of training materials and performance will be evaluated.
Date: August 1999
Creator: Wilson, Phillip H.
Partner: UNT Libraries

The effectiveness of Say It Straight communications training with adults in outpatient chemical dependency treatment

Description: This study compared an experimental group who participated in weekly Say It Straight (SIS) sessions as an adjunct to existing treatment protocols for a period of 6-8 weeks, to a control group who matriculated in treatment without the addition of SIS training for a period of 6-8 weeks.
Date: May 1999
Creator: Hardy, Rebecca B. (Rebecca Biggerstaff)
Partner: UNT Libraries

Jorie Graham's "The Guardian Angel of the Little Utopia": The truth of mystery and "Moonbeams in Quota"

Description: The dissertation includes a critical essay on Jorie Graham's The Guardian Angel of The Little Utopia and a full length collection of poetry entitled Moonlight in Quota. The essay is a critical examination which argues that Graham's poems question Western anthropocentric thought through her constant arrangement of particular images (flowers, yellow sky, leaves) and her subsequent questioning of such intellectual and linguistic arrangements. Graham grapples with ideas of perception, questions the historical concepts of truth and knowledge, and engages in linguistic play both musically and imagistically.
Date: May 1999
Creator: Luna-Grochocki, Sheryl
Partner: UNT Libraries

Search for the Higgs Boson and Technicolor Particles in p anti-p Colisions at sqrt(s) = 1.8 TeV

Description: In the Standard Model (SM) of the elementary particles, the interactions among the known fundamental fermions (leptons and quarks) are mediated through gauge bosons which obey the symmetry: SU(3) {circle_times} SU(2) {circle_times} U(1). More precisely, the electroweak interaction [4-6] is described by a gauge symmetry SU(2) {circle_times} U(1) which is broken spontaneously. The electroweak symmetry breaking is implemented by the introduction of a complex scalar Higgs field which has a non-zero vacuum expectation value (vev). This way, the lagrangian of the theory remains invariant under SU(2) transformations, but quantization of the fields must start from a ground state which does not exhibit this symmetry, and therefore the full symmetry of the lagrangian is not manifest. Invariance of the theory under local SU(2) transformations implies the presence of vectorial gauge fields which mediate the electroweak interactions. The so called spontaneous symmetry breaking allows the quanta of these gauge fields, the W and Z bosons, to acquire a finite mass. The photon, the particle which mediates the electromagnetic interaction, remains massless. The Higgs boson is one of only two particles in the SM which have not yet been directly observed (the other is the {nu}{sub {tau}}, although there is indirect evidence of its existence). Although the SM does not predict the Higgs mass, a lower limit {approx} 100 GeV/c{sup 2} is set by LEPII data, and theoretical considerations prefer Higgs masses not higher than a few hundred GeV/c{sup 2}. At the Tevatron, a search for the Higgs boson is hard due to the small production cross section and the huge backgrounds that do not allow to see the signal clearly. It is still interesting, however, to perform sensitivity studies at the Tevatron. The easiest production channel to observe at the Tevatron is the associated production of Higgs with weak (W or Z) ...
Date: November 1, 1999
Creator: Cortabitarte, Rocio Vilar & /Cantabria U., Santander
Partner: UNT Libraries Government Documents Department

Paul Wittgenstein's transcriptions for left hand: pianistic techniques and performance problems : a lecture recital, together with three recitals of selected works of R. Schumann, S. Prokofiev, F. Liszt, M. Ravel, and F. Chopin

Description: Paul Wittgenstein (1887-1961) made significant contributions to the piano literature for the left hand through numerous commissioned works as well as his own transcriptions. In the transcriptions, Wittgenstein preserved the texture of two-hand music, aiming for the simulation of the original works.
Date: August 1999
Creator: Kong, Won-Young
Partner: UNT Libraries

Michael Tippett's piano sonata No. 1: A study of his eclectic approach to the sonata form in the twentieth century, and three recitals with works by Beethoven, Bartok, Bach/Busoni, Schumann, Mozart, Ginastera, Barber, and Chopin

Description: The intent of this dissertation is to investigate Michael Tippett's eclectic approach to the sonata form in the twentieth century as demonstrated in his Sonata No. 1. Topics of discussion include historical background of English music, particularly the English piano sonata, at the turn of the century, biographical information and a general overview of tippet's music, a brief examination of Tippett's Sonata Nos. 2, 3, and a formal analysis of Sonata No. 1 as well as Tippett's approach to contrapuntal techniques, rhythm, harmony and tonality.
Date: May 1999
Creator: Kwak, Stacy (Stacy Joo Yeon)
Partner: UNT Libraries

A performer's analysis of Benjamin Britten's Phaedra, dramatic cantata for mezzo soprano and small orchestra, op. 93: a lecture recital, together with three recitals of selected works of H. Purcell, R. Schumann, R. Vaughan Williams, P. Tchaikovsky, G. Fauré, K. Löwe, G. Menotti, S. Barber and others

Description: In order to gain complete understanding of Phaedra, this document will begin with an investigation into the historical background of Racine's Phédre and the conventions of French tragedy from which it arose. Lowell's translation method will then be explored in comparison to Racine's play. In turn, Britten's extractions from Lowell's translation will be examined. Further the baroque elements of the cantata and the compositional ideas inherited by Britten from Henry Purcell will be included. Finally there will be an inspection of the character of Phaedra and Britten's interpretation through orchestration through orchestration and melodic choices.
Date: May 1999
Creator: Beard-Stradley, Cloyce (Cloyce May)
Partner: UNT Libraries

Alec Wilder's music for marimba: a performance guide, a lecture recital, together with three recitals of selected works of G. Stout, N. Zivkovic, D. Erb, W. Kraft, K. Abe, W. Penn and others

Description: The intent of this dissertation is to provide a reference guide for any prospective performer of Alec Wilder's four works for marimba: Suite for Solo Guitar (1976), Suite for Trumpet and Marimba (1977), Suite for Flute and Marimba (1977), and Sextet and Marimba and Wind Quintet (1977). The first part of the dissertation provides background information pertaining to Wilder himself, the works for marimba, and theoretical aspects of Wilder's music. The second part addresses specific performance problems contained in the music. The dissertation culminates with the presentation of a performance edition of the marimba part of the previously unedited Sextet.
Date: May 1999
Creator: Waldrop, Michael Van
Partner: UNT Libraries

A performance analysis of Joseph Turrin's works for solo trumpet, a lecture recital, together with three recitals of selected works by J.S. Bach, E. Bloch, H. Tomasi and others

Description: This study addresses on facet of Joseph Turrin's compositional oeuvre: his published works for solo trumpet. Complete histories if all six trumpet compositions are chronicles. A discussion of formal organization and significant style features including harmonic language, melodic style and rhythmic features is included. A detailed performance analysis follows. The degree of difficulty of each work is assessed through an investigation of tessitura, range, melodic contour, endurance factors, fingerings, and technical features of the accompaniment. Analysis of tempi and dynamics, articulation and phrasing, and timbral considerations provides additional points of focus to the study. Finally, the importance of Turrin's works for trumpet and his impact on trumpet literature is assessed. Idiomatic aspects of composition that make Turrin's music attractive to performers are investigated and discussed.
Date: May 1999
Creator: Korak, John
Partner: UNT Libraries

The history of horn playing in Los Angeles from 1920 to 1970: a lecture recital, together with three recitals of selected works for horn by M. Haydn, Franz, Britten, Mozart, Koetsier, Hindemith, Herzogenberg, Rossini, Stevens and others

Description: The History of Horn Playing in Los Angeles from 1920 to 1970 begins with the horn players who played in the silent film orchestras and the Alfred Brain's tenure with the Los Angeles Philharmonc. This study details the introduction of sound tracks, the early studio orchestras, the contact studio orchestras, the musician union's role in structuring the work environment, the horn players who played in both the Los Angeles Philharmonicand the studios, major figures from the subsequent freelance perios such as Vincent de Rosa, and the local and international influence of the Los Angeles Horn Club.
Date: May 1999
Creator: Hilliard, Howard (Howard Louis)
Partner: UNT Libraries

Monitoring watershed health in the upper Trinity River Basin, North Central Texas

Description: This study conducts watershed analysis using biological and geo-spatial techniques. Incorporating landscape features with biological attributes has been shown to be an effective method of monitoring environmental quality within watersheds. In situ biomonitoring using the Asiatic Clam, Corbicula fluminea, habitat suitability, and water quality data were evaluated for their potential to describe ecological conditions in agricultural and urban areas within the Upper Trinity River watershed. These data were analyzed with GIS to identify effects of land use on ecological conditions.
Date: May 1999
Creator: Csekitz, Jill Diane
Partner: UNT Libraries

Gender, jobs and geographic origin of Australian immigrants

Description: This thesis examines access to managerial jobs in the Australian labor market by immigrant women and men from five continents and five individual countries. Comparisons were not made only among both continent and country groups, but also between the women and men within each group, as a measure of occupational gender inequality.
Date: August 1999
Creator: Flanagan, Annette F.
Partner: UNT Libraries

A stylistic analysis of Fabrics, a brass quintet by John Stevens:a lecture recital, together with three recitals of selected works of E. Gregson, B. Broughton, P. Hindemith, V. Holmboe, H. Stevens, J.S. Bach, and others

Description: A stylistic analysis of John Stevens' second brass quintet, Fabrics, which discusses the composer's use of orchestration, harmonic language, rhythmic activity, melodic and formal considerations, and performance practice issues. Collaboration between composer and performer is investigated, particularly through Stevens' status as member of the Wisconsin Brass Quintet, the ensemble for which Fabrics was composed. Biographical information about Stevens and the Wisconsin Brass Quintet is provided, with appendices providing information regarding Stevens' activities as composer and performer and the activities of the Wisconsin Brass Quintet. Stevens was extensively interviewed as source material for this dissertation.
Date: May 1999
Creator: Spies, David Edward
Partner: UNT Libraries

Counselor Effectiveness and Correlations With Select Demographic Variables for Masters Level Counseling Students

Description: Counselor education programs are charged with the responsibility to train students to be effective counselors. Despite relative consistency in academic and clinical experiences, some students are less effective than others. It was the intent of this research to investigate possible relationships which may exist between students' background and experiences and their levels of demonstrated counselor effectiveness as measured by the Counselor Rating Form - Short Version (CRF-S) and the Supervisor Rated-Counselor Interaction Analysis (SR-CIA). It was hypothesized that counselor effectiveness would be negatively correlated with prior teaching experience and level of religious participation. Data was collected using a demographic survey from masters level counseling students participating in their practicum semester. Counseling tapes from each of the participants were collected towards the end of the semester. These tapes were then rated by doctoral students using the CRF-S and the SR-CIA. The total sample size was 28. Regression analysis was used to investigate the hypotheses. Three models were constructed. The dependent variables used were scores from the CRF-S, the SR-CIA and a third comprised of a normalized composite of CRF-S and SR-CIA termed COMPOSITE. Each model used, as the independent variables, years of teaching experience, and hours of religious participation. Results from regression analysis suggested that a negative correlation existed between counseling effectiveness and years of teaching experience and a positive correlation between counselor effectiveness and hours of religious participation. Statistically significant results were not achieved for any of the models tested. Further investigation was conducted using effect size analysis. Small to medium effect sizes were achieved, however, suggesting that the models were detecting a negative correlation between counselor effectiveness and years of teaching experience, and a positive correlation between hours of religious participation and counselor effectiveness.
Access: This item is restricted to UNT Community Members. Login required if off-campus.
Date: December 1999
Creator: Calhoun, Kenneth
Partner: UNT Libraries

The Effect of Increased Collaboration Among the Library Media Specialist and School Personnel on Perceptions of the Roles and Responsibilities of the Library Media Specialist

Description: This study measured and explored changes in perceptions of the roles and responsibilities of the library media specialist when the level of collaboration increased. Seven library media specialists targeted four members of their educational communities with whom to increase collaborative activities. Before and after the collaboration began, the library media specialists, the teachers with whom they chose to collaborate, other members from the same educational community, and a control group that did not participate in increased collaboration were given a roles and responsibilities rank-order form. This form was used to measure changes in perceptions regarding the importance of the three roles and selected responsibilities related to the three roles before and after the collaborative experience. The library media specialists and the targeted teachers also kept reflection logs to record factors that enhanced collaboration, factors that inhibited collaboration, and any changes in their teaching style as a result of the collaborative experience. Results indicate that the participating library media specialists themselves experienced the most change. Role identification remains a problem as library media specialists seek to become teaching partners with classroom teachers yet still must keep the library media center aligned with school and district goals and move toward making it an information center that provides information resources for all members of the educational community in an effective, efficient and timely manner. Major enhancers to increased collaboration included flexible scheduling of the library, sharing ideas and resources, partnership in teaching, and student achievement. Major inhibitors included time, wanting to keep things the way they were, and lack of resources. Changes in teaching practice included working with another professional instead of in isolation, integrating many resources into the lesson to provide for the learning needs of all students, the incorporation of technology into the lesson, and an awareness of the roles of ...
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Date: August 1999
Creator: Beaird, Marilyn Miller
Partner: UNT Libraries

Cassette Systems for Creating Intergeneric Hybrid ATCases

Description: Cassette systems for creating intergeneric hybrid ATCases were constructed. An MluI restriction enzyme site was introduced at the carbamoylphosphate binding site within the pyrB genes of both Pseudomonas putida and Escherichia coli. Two hybrids, E. coli pyrB polar domain fused with P. putida pyrB equatorial domain and P. putida pyrB polar domain fused with E. coli pyrB equatorial domain, are possible. The intergeneric E. coli-P. putida hybrid pyrB gene was constructed and found to encode an active ATCase which complemented an E. coli Pyr- strain. These hybrids are useful for kinetic and expression studies of ATCase in E. coli.
Date: December 1999
Creator: Simpson, Luci N.
Partner: UNT Libraries

Scientific Considerations of Olestra as a Fat Substitute

Description: Olestra is, a sucrose polyester, a noncaloric fat substitute, made from sucrose and several fatty acid esters. It has been approved by the FDA as a food additive used in preparing low-fat deep-frying foods such as savory snacks. Available literature on olestra was evaluated that had both positive and negative connotations. Clinical trials in numerous species of animals including humans were conducted to determine if olestra would affect the utilization and absorption of macro- and micronutrients; the effects of olestra on growth, reproduction, or its toxicity were also examined. The roles of olestra as a fat substitute, how it could effect on humans and the environment, and the potential impacts from its use in large amounts were assessed. Olestra can be removed from the environment by aerobic bacteria and fungi which may be isolated from activated sludge and soils.
Date: December 1999
Creator: Rattagool, Kullakan
Partner: UNT Libraries

Performing "Camp, Vamp & Femme Fatale": Revisiting, Reinventing & Retelling the Lives of Post-Death, Retro-Gothic Women

Description: This thesis examines the production process for "Camp, Vamp and Femme Fatale," performed at the University of North Texas in April of 1997. The first chapter applies Henry Jenkins's theory of textual poaching to the authors' and cast's reappropriation of cultural narratives about female vampires. The chapter goes on to survey the narrative, cinematic and critical work on women as vampires. As many of the texts were developed as part of the fantasy role-playing game Vampire: The Masquerade, this chapter also surveys how fantasy role-playing develops unpublished texts that can make fruitful ground for performance studies. The second chapter examines the rehearsal and production process in comparison to the work of Glenda Dickerson and other feminist directors.
Date: December 1999
Creator: Ruane, Richard T.
Partner: UNT Libraries