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From ZZ to ZH : How Low Can These Cross Sections Go or Everybody, Let's Cross Section Limbo!
We report on two searches performed at the D0 detector at the Fermi National Laboratory. The first is a search for Z di-boson production with a theoretical cross section of 1.4 pb. The search was performed on 2.6 fb{sup -1} of data and contributed to the first observation of ZZ production at a hadron collider. The second is a search for a low mass Standard Model Higgs in 4.2 fb{sup -1} of data. The Higgs boson is produced in association with a Z boson where the Higgs decays hadronically and the Z decays to two leptons. The ZZ search was performed in both the di-electron and di-muon channels. For the ZH search, we will focus on the muonic decays where we expanded the traditional coverage by considering events in which one of the two muons fails the selection requirement, and is instead reconstructed as an isolated track. We consider Higgs masses between 100 and 150 GeV, with theoretical cross sections ranging from 0.17 to 0.042 pb, and set upper limits on the ZH production cross-section at 95% confidence level.
Date:
August 1, 2009
Creator:
Strauss, Emanuel Alexandre
System:
The UNT Digital Library
The Effects of Multisensory Perceptual Training on Reading and Perceptual Development at the First-Grade Level
This was a study designed to investigate the effects of three independent variables in first-grade reading instruction on reading achievement and perceptual development. The independent variables included initial readiness level, type of instructional method, and sex of pupil. The major purpose of this study was to use an experimental setting to determine the relative effects of a multi-sensory perceptual training program combined with a basal-instruction program, as contrasted to an entirely conventional basal-reading program, on first-grade reading achievement and perceptual development during a school year.
Date:
1969
Creator:
Nichols, Edith E.
System:
The UNT Digital Library
Social Exchange Under Fire: Direct and Moderated Effects of Job Insecurity on Social Exchange
This study is concerned with the impact of job insecurity on the vital social exchange relationship between employee and employer. Specifically, it explored the relationship between job insecurity and two important social exchange outcomes—organizational commitment and organizational citizenship behavior. Moreover, it assessed the moderating effects of individual factors (communal orientation and powerlessness) and situational factors (trust in management, procedural fairness, and organizational support) on these relationships.
Date:
May 1998
Creator:
Bultena, Charles D. (Charles Dean)
System:
The UNT Digital Library
Search for r-parity violating supersymmetry in multilepton final states with the D0 detector
Results obtained from a search for the trilepton signature {mu}{mu}{ell} (with {ell} = e, or {mu}) are combined with two complementary searches for the trilepton signatures ee{ell} and eer and interpreted in the framework of R-parity violating Supersymmetry. Pairwise, R-parity conserving production of the supersymmetric particles is assumed, followed by R-parity violating decays via an LL{bar E}-operator with one dominant coupling {lambda}{sub 122}. An LL{bar E}-operator couples two weak isospin doublet and one singlet (s)lepton fields and thus violates lepton number conservation. The data, collected with the D0 detector at the Fermilab proton-antiproton collider Tevatron, corresponds to an integrated luminosity of {integral} L dt = 360 {+-} 23 pb{sup -1}. No evident is observed, while 0.41 {+-} 0.11(stat) {+-} 0.07(sys) events are expected from Standard Model processes. The resulting 95% confidence level cross section limits on new physics producing a {mu}{mu}{ell} signature in the detector are of the order of 0.020 to 0.136 pb. They are interpreted in two different supersymmetry scenarios: the mSUGRA and the MSSM model. The corresponding lower limits on the masses of the lightest neutralino ({tilde {chi}}{sub 1}{sup 0}) and the lightest chargino ({tilde {chi}}{sub 1}{sup {+-}}) in case of the mSUGRA model are found to …
Date:
November 1, 2006
Creator:
Kaefer, Daniela
System:
The UNT Digital Library
Sustainable Healthcare Provider OUD Assessment and Management in Rural Native American Communities (RNACs): Prevention, Treatment, and Recovery Approaches
In the US, rural Native American communities (RNACs) experience excess morbidity in mental health disorders and mortality from opioid use disorder (OUD). This study used mixed methods to evaluate and analyze the primary data from 76 healthcare providers (HPs) from 24 states across the US (physicians = 7%), to identify HP knowledge and training regarding available prevention, treatment, and recovery (PTR) programs in treating OUD, assessment and management skills, and networking and collaboration capacity among the RNACs they serve. The HP completed the Opioid Survey for Health Care Providers online. A majority of HPs reported a need for knowledge and training regarding OUD treatments (92%). Less than half of the HPs provide intensive outpatient treatment; 40% contracted out for medication assisted treatment/medications for opioid use disorder (MAT/MOUD) services. Recovery support was low at 33% for adults and 38% for youth. HPs reported use of Narcan to be effective in reversing overdose (87%). Qualitative responses supported survey findings and described barriers, including lack of resources, inadequate staffing, insufficient funding, lack of training and OUD knowledge, stigma, and lack of tribal involvement and support. The study findings indicate HPs' need for information and training about OUD and networking and collaboration of healthcare …
Date:
July 2023
Creator:
Mincer, Wendy Faye
System:
The UNT Digital Library
Study of collisons of supersymmetric top Quark in the channel stop anti-stop -> e+- mu-+ sneutrino anti-sneutrino b anti-b with the experience of D0 at the Tevatron. Callibration of the electromagnetic calorimeter at D0.
Supersymmetry is one of the most natural extensions of the Standard Model. At low energy it may consist in the Minimal Supersymmetric Standard Model which is the framework chosen to perform the search of the stop with 350 pb{sup -1} of data collected by D0 during the RunIIa period of the TeVatron. They selected the events with an electron, a muon, missing transverse energy and non-isolated tracks, signature for the stop decay in 3-body ({bar t} {yields} bl{bar {nu}}). Since no significant excess of signal is seen, the results are interpreted in terms of limit on the stop production cross-sections, in such a way that they extend the existing exclusion region in the parameter space (m{sub {bar t}},m{sub {bar {nu}}}) up to stop masses of 168 (140) GeV for sneutrino masses of 50 (94) GeV. Finally because of the crucial role of the electromagnetic calorimeter, a fine calibration was performed using Z {yields} e{sup +}e{sup -} events, which improved significantly the energy resolution.
Date:
October 1, 2006
Creator:
Mendes, Aurelien & /Marseille U., Luminy
System:
The UNT Digital Library
Structural Analysis of the TOL pDK1 xylGFJQK Region and Partial Characterization of the xylF and xylG Gene Products
Access:
Use of this item is restricted to the UNT Community
TOL plasmids encode enzymes responsible for utilization of toluene and related aromatic compounds by Pseudomonas putida, ultimately converting them to central metabolic intermediates. The nucleotide sequence for the 5.6 kb xylGFJQK region of the pDK1 TOL meta operon was determined. DNA sequence analysis revealed the presence of five open reading frames corresponding to xylG (1458 bp), xylF (846 bp), xylJ (783 bp), xylQ (936 bp) and xylK (1047 bp), encoding predicted protein products of 51.6, 31.3, 27.8, 32.8, and 36.6 kDa in size, respectively. The average G+C content of the xylLTEGFJQK region was 65.7%, somewhat higher than the 58.9% seen in the immediately upstream xylXYZ region and substantially more than the 50% G+C content reported for the upper TOL operon of this plasmid. Homology comparisons were made with genes and proteins of related catabolic plasmids. The dmpCDEFG and pWWO xylGFJQK regions exhibit consistently high levels of nucleotide and amino acid homology to pDK1 xylGFJQK throughout the entire region. In contrast, although the nucleotide sequence homology of the Acinetobacter atdCDE region to xylGFJ is high, the homology of atdFG to xylQK is markedly less. Such radical changes in homology between corresponding regions of different operons, combined with variable base and codon …
Date:
December 1999
Creator:
Poulter, Melinda D.
System:
The UNT Digital Library
A Study of Body-and-Soul Poetry in Old and Middle English
In this paper I will examine the sources for the tradition of the address of the soul to the body or the dialogue between, the two. I will consider the Old and Middle English poetic expressions of the body-and-soul legend in terms of the criticism of the ten poems which specifically belong to that tradition and the elements which constitute that genre. I will also deal with those poems written at the same time which exhibit one or more of those elements, with the body-and-soul tradition in English morality plays, with the Ars Moriendi, and with the Dance of Death. I will demonstrate that a shift occurs in the consideration of death from a concern for the soul to a preoccupation with the grotesque and gruesome aspects of death. The address and dialogue forms fall into disuse as a vehicle for theological argument concerning the responsibility for sin, and the view of death reflected by the popular pictorial representations of the Dance of Death becomes prominent.
Date:
August 1979
Creator:
Tuck, Mary Patricia
System:
The UNT Digital Library
Male Army Nurses: The Impact of the Vietnam War on Their Professional and Personal Lives
As American involvement in Vietnam escalated in the 1960s, the military's need for medical personnel rose as well. A shortage of qualified nurses in the United States coupled with the requirements of providing adequate troops abroad meant increased opportunity for male nurses. To meet the needs of Army personnel, the Army Nurse Corps actively recruited men, a segment of the nursing population that had previously faced daunting restrictions in the Army Nurse Corps (ANC). Amidst mounting tension, the Army Student Nurse Program began accepting men and provided educational funding and support. Additionally, Congress extended commissions in the Regular Army to previously excluded male nurses. Men answered the call and actively took advantage of the new opportunities afforded them by the demands of war. They entered the educational programs and committed to serve their country through the ANC. Once admitted to the corps, a large percentage of male nurses served in Vietnam. Their tours of duty proved invaluable for training in trauma medicine. Further, these men experienced personal and professional growth that they never would have received in the civilian world. They gained confidence in their skills and worked with wounds and diseases seldom seen at home. For many, the opportunities …
Date:
August 2000
Creator:
Hess, Lucinda Houser
System:
The UNT Digital Library
Operationalizing Listening-to-Question and Questioning-to-Listen in Mathematics Teaching
This study focused on the evaluative listening practices of four teachers who participated in an algebra professional development involving lesson study. This instrumental case study operationalizes the enactment of teacher listening followed by teacher questions and responses to define listening-to-question. Also, questioning-to-listen is operationalized as the enactment of purposefully posing questions to posture oneself to listen to students' mathematical thinking. Because of the tacit aspect of teacher listening and the visibility of teacher questioning, interrelating listening and questioning affords teachers an accessible point of entry into developing listening practices. In response to participants wondering as to when evaluative listening is appropriate in the mathematics classroom, this study discusses six instances of teaching excerpts along a continuum of listening orientations from directive to observational to responsive. The results indicate positive aspects of evaluative listening towards an observational and responsive listening stance. Results of the study also confirm a reliance on low-order gathering information questions as the predominant type of teacher question posed in mathematics teaching. This study reveals the necessity of contextualizing teacher questions to inform appropriate uses of evaluative listening. Future professional development should consider emphasizing positive aspects of evaluative listening in mathematics teaching.
Date:
August 2018
Creator:
Kuehnert, Eloise Aniag
System:
The UNT Digital Library
Some Aspects of the National Education Association's Emphases on Instruction
The purpose of this study was to identify and describe the purposes, plans, activities, and programs of the National Education Association that focused upon instruction. To carry out this purpose, guideline questions were developed. Answers to the questions were sought through leads obtained from a study of the volumes of Addresses and Proceedings for the years since the first NTA meeting in 1857 through the 1976 NEA Convention and editions of the NEA Handbook from the first in 1945 through the 1976 edition. Findings were presented in a six-chapter historical-descriptive narrative. Although interest in instruction is not an exclusive concern held only by professional associations, the findings of this study do suggest that instruction has been a fortunate focus for the NEA in two respects. First, the times of NEA's more obvious emphasis on instruction have been relatively free of criticism of Association activity. Secondly, emphasis on instruction has emerged as a thread to unify the National Education Association with diverse organizations and with classic human institutions--the home, the church, the school, and governmental agencies--throughout the world.
Date:
December 1977
Creator:
Kemp, Doris Ruth
System:
The UNT Digital Library
The Use of a Real Life Simulated Problem Based Learning Activity in a Corporate Environment
This narrative study examines using a real life simulated problem base learning activity during education of clinical staff, which is expected to design and develop clinically correct electronic charting systems. Expertise in healthcare does not readily transcend to the realm of manipulating software to collect patient data that is pertinent to the care of patients. To gain the expertise, troubleshooting abilities and knowledge required to maintain their clinical system, each participant in this study has gone through the RLSPBL activity. Education in the corporate world must be effective and efficient while providing a good return on the educational investment. Corporate education must use material contextually similar to a workplace, and the techniques for education must provide both near and far transfer of the material. Ten individuals (eight clinical, two non-clinical) who work across the United States were interviewed; their reflections on their career as a clinical interface designer are told here. The participants varied in their age, educational background, and current work responsibility and computer experience. Their insights revealed four major themes which summarize their stories: problem-based learning, collaboration, hands-on activities and the use of a real-life simulated problem-based learning activity.The clinical environment requires patient safety as a paramount parameter …
Date:
May 2013
Creator:
Laurent, Mark A.
System:
The UNT Digital Library
An Art Curriculum Guide for the Junior High Catholic School System of the Dallas Diocese
This study is about the development of a curriculum guide which projects flexibility, continuity, sequential framework, and to a certain extent, uniformity, around which each teacher may build an art program that will best meet the students' needs. Areas pertinent to developing the curriculum guide are presented in light of literature in this field. The guide may be used to facilitate the teaching of art in recognizing and understanding artistic development that is essential in bringing to fruition the inherent individual ability of all the Junior High Catholic School students.
Date:
May 1983
Creator:
Da Silva, Geraldine
System:
The UNT Digital Library
Functional Theory for Applied Music Students
The purpose of this study was to prepare music theory textbook-workbooks for students of elementary school grades four through eight who are taking private music lessons in voice, piano, or other instruments. The study was prompted by the action taken first by Texas Music Teachers Association and later by Music Teachers National Association which made the passing of comprehensive music theory examinations a prerequisite for entering all student performance and contest events sponsored by these associations.
Date:
December 1970
Creator:
Flinn, Lois Clark
System:
The UNT Digital Library
Carbon Capture Utilization for Bio-Based Building Insulation Foams
Ecological, health and environmental concerns are driving the need for bio-resourced foams for the building industry and for other applications. This is because insulation is one of the most important aspects of the building envelope. Global building insulation is expected to reach USD 27.74 billion in 2022. Conventional insulation materials currently used in buildings are made from nonrenewable products (petroleum, fiber glass). However, they yield increasing unrecyclable eco-unfriendly waste at the end of their lives; styrene and polyurethane generates over 100,000 kg of waste insulation in US alone yearly. This is because they are non-biodegradable and can remain as microplastics in the environment for 1000 years. Polyurethane contains the same amount of energy as coal. Additionally, most of the processing techniques and blowing agents used in this manufacturing of these foams are cancerous and injurious to health when inhaled. Because buildings and their construction together account for 36% of global energy use and 39% of energy-related carbon dioxide emissions annually, there is a need to develop eco-friendly foams that will serve as possible substitutes to the currently used petroleum-based foams. This dissertation examined the development and characterization of eco-friendly foams that were developed using the melt mixing technique of bio-resourced …
Date:
August 2021
Creator:
Oluwabunmi, Kayode Emmanuel
System:
The UNT Digital Library
An Analysis of the Knowledge and Attitudes of Secondary School Teachers Concerning Suicide Among Adolescents and Intervention in Adolescent Suicide
The purpose of this study is to analyze the interaction of (1) the secondary school teacher's knowledge concerning both the problem of adolescent suicide and the potential for teacher intervention and (2) selected demographic variables on the dependent variables of the teacher's attitudes concerning both the problem of adolescent suicide and the potential for teacher intervention in order to develop a data base upon which to examine the prospects for realizing the intervention potential of secondary school teachers in the area of adolescent suicide. Findings indicate that there are significant differences in knowledge concerning the problem of adolescent suicide and the potential for teacher intervention as a function of particular demographics. Similarly, there are significant differences in attitude toward the problem of adolescent suicide and the potential for teacher intervention as a function of particular demographics. Findings further reveal that level of knowledge appears to be a significant contributing factor in the secondary school teacher's attitude as a function of selected demographics. Secondary school teachers appear to possess a low level of knowledge concerning both the problem of adolescent suicide and the potential for teacher intervention, and they exhibit a range of predominantly negative attitudes toward the problem of adolescent …
Date:
May 1979
Creator:
Gordon, Susan E. Licht
System:
The UNT Digital Library
Search for first generation leptoquarks in electron + neutrino + dijet channel
None
Date:
May 1, 2004
Creator:
Cothenet, Alexis
System:
The UNT Digital Library
The United States Occupation of Mexico City, 1847-1848
The expansionist agenda of the Polk administration culminated in the War with Mexico. The capture of Mexico City in September 1847 left the United States Army with the unprecedented task of occupying an enemy capital for an extended period. After the initial theaters of operation proved unable to secure a peace, Maj. Gen. Winfield Scott commenced a campaign to take central Mexico including the capital city. In March 1847, an army of 11,000 soldiers under Scott landed at Vera Cruz. In six months, Scott's army marched over 250 miles and won five major battles. In mid-September, Scott took Mexico City. Throughout the campaign, Scott attempted to implement a pacification plan in an effort to prompt Mexico to open peace negotiations. Concern for his army weighed heavily on him as he faced unprecedented challenges in occupying Mexico City after its capture. The United States simply had almost no experience in the ramifications of fighting a foreign war, other than a few brief small-scale incursions onto foreign soil at Tripoli in 1805 and in British Canada. The difficulties that arose for Scott from the situation in Mexico were frustrating. Scott pacification plan used conciliation, coercion, and force on Mexico's army and people …
Date:
May 2022
Creator:
Onyon, David E
System:
The UNT Digital Library
Environmental Determinants and Choice of Project Evaluation Techniques in US and UK Firms
The purpose of this dissertation is to develop a theory that helps explain the conditions under which firms select certain project evaluation techniques. This study uses contingency theory to analyze the impact of environmental uncertainty on the choice of project evaluation techniques. In addition to a direct measure of uncertainty, several dimensions of uncertainty are included in this study. These dimensions of uncertainty include control structure, method of financing, foreign assets, method of growth, and product domination. This study also analyzes the use of project evaluation, management science and risk management techniques in US firms over time and in UK firms over time in order to compare to prior research. A comparison of firms in the two countries are also provided. The primary method of data collection was a survey instrument. Data were also collected from annual reports and various other public sources. The variables that appear significant in the choice of project evaluation technique in US firms are environmental uncertainty, control structure, method of financing, foreign assets, and product domination. The variable that appear significant in the choice of project evaluation technique in UK firms is method of financing. US firms favor discounted cash flow techniques although this study …
Date:
May 1996
Creator:
Smolarski, Jan M. (Jan Mietek)
System:
The UNT Digital Library
Rhetorical Transformations of Trees in Medieval England: From Material Culture to Literary Representation
Literary texts of medieval England feature trees as essential to the individual and communal identity as it intersects with nature, and the compelling qualities and organic processes associated with trees help vernacular writers interrogate the changing nature of this character. The early depiction of trees demonstrates an intimacy with nature that wanes after the tenth-century monastic revival, when the representation of trees as living, physical entities shifts toward their portrayal as allegorical vehicles for the Church's didactic use. With the emergence of new social categories in the late Middle Ages, the rhetoric of trees moves beyond what it means to forge a Christian identity to consider the role of a ruler and his subjects, the relationship between humans and nature, and the place of women in society. Taking as its fundamental premise that people in wooded regions develop a deep-rooted connection to trees, this dissertation connects medieval culture and the physical world to consider the variety of ways in which Anglo-Saxon and post-Norman vernacular manuscripts depict trees. A personal identification with trees, a desire for harmony between society and the environment, and a sympathy for the work of trees lead to the narrator's transformation in the Dream of the Rood. …
Date:
December 2008
Creator:
Grimes, Jodi Elisabeth
System:
The UNT Digital Library
An Analysis of the Motivational Content of Current Basal Reader Stories
The problem was to compare the motivational elements of basal reader stories of the past with those of the present. The purpose of the problem were 1) to determine the motivational content as represented by thema found in current basal reader stories and 2) to find differences, if any, between motivational content basal reader stories and findings of previous research.
Date:
January 1967
Creator:
Myers, Howell Lewis, 1922-
System:
The UNT Digital Library
Mathematics Teacher Motivation in the Context of Lesson Study with Open Approach
Providing professional development to in-service teachers remains a high priority when attempting to meet state and federal school accountability requirements, yet principals may neglect teacher motivation and the teacher change process when facilitating teacher learning. Drawing on self-determination theory, this research examined social and environmental factors shaping teacher motivation in the context of lesson study with open approach. This descriptive case study included the perceptions of eight secondary mathematics teachers who engaged lesson study as a form of professional development. Thematic analysis of semi-structured interviews suggested the following contextual factors improve motivation: emerging proficiency, synergy, interpersonal dynamics, volition, and internalization. Additionally, apprehension, minor barriers, and contentious interpersonal dynamics may reduce intrinsic-like motivation. As teachers encountered supportive contextual factors, they satisfied their need to experience competence, relatedness, and autonomy which encouraged value internalization of new learning manifesting as an epistemological shift in teaching paradigm. By internalizing the value of new learning, teachers may become more likely to authentically enact new pedagogy in their classrooms. The results of this study indicated lesson study with open approach may provide a robust form of learning capable of changing prior instructional beliefs. These findings suggest principals create and maintain contextual factors (with deliberate intent) that …
Date:
August 2019
Creator:
Petty, Clinton Scott
System:
The UNT Digital Library
Toward a Framework for a New Philosophy of Music Education: Løgstrup as Synergy Between the Platonic and the Aristotelian Perspectives in the Music Education Philosophies of Bennett Reimer and David Elliott
In the domain of music education philosophy there are, at present, two foundational systems that purport to be self-contained philosophies of music education. These are music education as aesthetic education, often referred to as MEAE, espoused by Bennett Reimer, and the praxial philosophy of music education posited by David Elliott. The debate between these two philosophies has been contentious and has had the effect of fracturing the philosophical underpinning of the music profession in an irreconcilable way. It is the purpose of this dissertation to introduce a third voice, that of the Danish philosopher Knut Løgstrup, to serve as a synergy between the philosophies of Reimer and Elliott and lead toward a framework of thinking for music education philosophy. I assert that the philosophies of Reimer and Elliott represent a modern articulation of an ancient dialectic between Platonic and Aristotelian ideals. Thus, the Reimer philosophy has its foundation in Platonic thought and Elliott has embraced an Aristotelian philosophical perspective. Løgstrup's position provides a third fundamental viewpoint that includes both Platonic and Aristotelian thinking and can therefore provide a synergy for these two music education philosophies. He refers to his philosophy as an ontological ethics. As a methodological approach, I utilize …
Date:
December 2006
Creator:
Wheeler, T. Ray
System:
The UNT Digital Library
Oracy, Literacy and the Music of Adam De La Halle: The Evidence of the Manuscript Paris, BibliothèQue Nationale f.fr. 25566
This study examines the thirteenth century Artesian trouvère Adam de la Halle in the manuscript Paris, Bibliothèque Nationale f.fr 25566 as it pertains to the oral/literate model for explaining characteristics of musical traditions. The fortuitous collaboration of a single scribe with a single composer on a musical collection encompassing a cross-section of thirteenth-century styles and idioms make this repertoire uniquely appropriate to a comparison of musical oracy and literacy.
Date:
August 1996
Creator:
Keyser, Dorothy
System:
The UNT Digital Library