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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

[Peter Nardi: Dissertation]

Description: A dissertation text from Peter Nadri analyzing the relationship between gays and lesbians towards their families and friends during holidays.
Date: 1994
Partner: UNT Libraries Special Collections

[Christopher Carrington notes]

Description: Notes from PHd. Candidate in Sociology, Christopher Carrington, from the University of Massachusetts Amherst. His dissertation topic is about gay and lesbian families' life and how they interact with their families during Thanksgiving.
Date: 1994
Partner: UNT Libraries Special Collections

Making meaning out of difference: a cultural studies analysis of the struggle over the meaning of gayness in "Ellen" and Time Magazine

Description: This study revealed sites of ideological differences between the April 30, 1997 episode of the sit com "Ellen" and an April 14th, 1997 Time magazine article where Ellen Degeneres (and the character she played on television) came out as a lesbian. This study examines the two pieces of media as a struggle over the meaning of gayness in modern American society.
Date: August 1998
Creator: Stearns, Susan
Partner: UNT Libraries

Critical factors in successful Texas middle schools 1993-1995

Description: An examination of the characteristics of Texas middle schools was conducted with the objective of developing a planning tool for middle staffs. This success is measured by the Academic excellence Indicator System (AEIS), whose rating scale has three components: campus scores on the Texas Assessment of Basic Skills (TAAS), campus attendance percentages, and campus dropout rates. TAAS scores and attendance rates have been the focus of this study.
Date: August 1997
Creator: Antoine, Terry W.
Partner: UNT Libraries

Advanced techniques in microbial and molecular biology: laboratory procedures for a graduate level course

Description: Advanced laboratory techniques for Microbial and Molecular Biology at the graduate level are presented in this thesis. The procedures for the laboratory experiments are set forth in detail. This laboratory is conducted as two parts, covering staining procedures, mutagenesis experiments, phenotyping strains, conjugative transfer of plasmids, and other topics.
Date: August 1998
Creator: Kumar, Shalini
Partner: UNT Libraries

Primarily Thai

Description: This thesis is a production report that describes the research process, pre-production and post-production stages of making a documentary about the Thai language school in the Thai temple in Dallas County. The film documents the teachers from Chulalongkorn University who volunteered to teach Thai-American students in the United States, and explores Thai-American students' attitudes toward the school and their heritage.
Date: May 1998
Creator: Phatthanodom, Fahmui
Partner: UNT Libraries

Substitution chemistry of Ruthenium clusters with the diphosphine ligands: 4,5-Bis(diphenylphosphino)-4-cyclo-penten-1,3-dione (bpcd), (Z)-Ph₂PCH=CHPP₂ and 3,4-Bis(diphenylphosphino)-5-methoxy-2(5H)-furanone (bmf)

Description: This study embarks on a program designed to study the reactivity of polynuclear clusters with redox-active phospines in an effort to prepare new ligand/cluster redox systems. This study aims to prove that such compounds will display superior electron reservoir capabilities, as a result of the cooperative mixing of ligand and cluster orbitals.
Date: May 1997
Creator: Shen, Huafeng
Partner: UNT Libraries

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

Assessing the feasibility of developing a DBAE curriculum in Qatar utilizing multimedia technology

Description: The purpose of this study was to demonstrate the feasibility of developing an art curriculum in Qatar, using the principles of the DBAE curriculum in conjunction with technology. Many of the challenges facing art educators and the art curriculum in Qatar can be approached through the multimedia applications of DBAE, which will provide instructors and students with an opportunity to more readily interact with visual art and to discover its educational relevance. Additionally, this study attempted to discover whether teachers are engaged in implementing technology in the art classroom and whether they are given the opportunity to engage in art to their satisfaction.
Date: May 1998
Creator: Al-Hamad, Wafaa
Partner: UNT Libraries

Ultrasensitive technique for measurement of two-photon absorption

Description: In this study the technique of pulse delay modulation is described, which can monitor nonlinear changes in transmission with shot noise limited signal-to-noise ratios even in the presence of large background signals.
Date: December 1991
Creator: Miller, Steven A. (Steven Alan)
Partner: UNT Libraries

Ode to the ninth: the poetic and musical tradition behind the finale of Beethoven's choral symphony

Description: This study examines the finale of Beethoven's choral symphony and focuses on its inspirations and aims to invoke critical theories involving genre, namely genre's "horizon of expectation", and lead to an enriched perspective that points toward a number of compelling aspects of the Choral Finale overlooked by previous commentators.
Date: May 1992
Creator: Parsons, James
Partner: UNT Libraries

An ethnographic study of outstanding veteran elementary teachers

Description: The purpose of this study was to describe outstanding, veteran elementary teachers using an ethnographic approach. This qualitative study was conducted in a suburban independent school district in northeast Texas serving approximately 17,000 students. The data collected focused on five outstanding, veteran elementary teachers who had at least twenty years of uninterrupted teaching service.
Date: August 1992
Creator: Adams, Sandra K. (Sandra Kay)
Partner: UNT Libraries

The art process in therapy:a phenomenological study

Description: This study utilized a phenomenological research methodology based on Husserl's work to explore the content of subjective internal experiencing during the art process. The study was designed to examine what transpired during the art experience in therapy to provide a better understanding of the therapeutic dimensions of the subject's interaction with the art medium, in this case, drawing with pastels.
Date: August 1991
Creator: Bliss, Shirley E.
Partner: UNT Libraries

An evaluative study of three units developed for multi-cultural and art historical resource curriculum for kindergarten and first grade ar

Description: Two curricular needs exist for the elementary art classroom: multi-cultural lessons which are customized to address North Texas ethnicities, and art history materials for early grades. This thesis addresses both of these concerns by developing lesson plans to meet the needs, and executing an evaluative study with North Texas art and regular classroom teachers of kindergarten and first grade.
Date: December 1990
Creator: Morrison, Pamela Jay Hudson
Partner: UNT Libraries

Trade negotiations in agriculture: a comparative study of the US & the EC

Description: This study applies Destler's institutional counterweights to Putnam's two-level analysis, substituting Liberal Institutionalism and Realism for internationalism and isolationism, in a comparative case study of the roles played by the United States and the European Economic Community in multilateral trade negotiations in agriculture under the aegis of the General Agreement for Tariffs and Trade during the first half of the Uruguay round.
Date: December 1994
Creator: Gordon, H. William (Harold William)
Partner: UNT Libraries