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1998

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Articles 14581 - 14610 of 14614

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Elastic And Proton-Dissociative Ρ0 Photoproduction At Hera, J. Breitweg, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, R. Yoshida, H. Zhang, Margarita C. K. Mattingly, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, S. De Pasquale, I. Gialas, P. Giusti, G. Iacobucci Jan 1998

Elastic And Proton-Dissociative Ρ0 Photoproduction At Hera, J. Breitweg, M. Derrick, D. Krakauer, S. Magill, D. Mikunas, B. Musgrave, J. Repond, R. Stanek, R. L. Talaga, R. Yoshida, H. Zhang, Margarita C. K. Mattingly, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, G. Castellini, M. Chiarini, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, S. De Pasquale, I. Gialas, P. Giusti, G. Iacobucci

Faculty Publications

Elastic and proton-dissociative ρ0 photoproduction (γp → p0p, γp → ρ0N, respectively, with p0 → π+π-) has been studied in ep interactions at HERA for photon-proton centre-of-mass energies in the range 50 < W < 100 GeV and for |t| < 0.5 GeV2, where t is the square of the four-momentum transfer at the proton vertex; the results on the proton-dissociative reaction are presented for masses of the dissociated proton system in the range M2N < 0.1W2. For the elastic process, the π+π- invariant mass spectrum has been investigated as a function of t. As in fixed target experiments, the ρ0 resonance shape is asymmetric; this asymmetry decreases with increasing |t|, as expected in models in which the asymmetry is ascribed to the interference of resonant and non-resonant π+π- production. The cross section has been studied as a function of W; a fit to the resonant part with the form Wa gives a = 0.16 ± 0.06 (stat.) +0.11-0.15 (syst.). The resonant part of the γp → π+π-p cross section is 11.2 ± 0.1 (stat.) +1.1-1.2 (syst.) μb at 〈W〉 = 71.7 GeV. The t dependence of the cross section can be described by a function of the type Aρ exp (-bρ|t| + cρt2) with bρ = 10.9 ± 0.3 (stat.) +1.0-0.5 (syst.) GeV-2 and cρ = 2.7 ± 0.9 (stat.) +1.9-1.7 (syst.) GeV-4. The t dependence has also been studied as a function of W and a value of the slope of the pomeron trajectory α IP′ = 0.23 ± 0.15 (stat.) +0.10-0.07 (syst.) GeV-2 has been deduced. The ρ0 spin density matrix elements r0400 r041-1 and ℜe[r0410] have been measured and found to be consistent with expectations based on s-channel helicity conservation. For proton-dissociative π+π- photoproduction in the ρ0 mass range, the distributions of the two-pion invariant mass, W and the polar and azimuthal angles of the pions in the helicity frame are the same within errors as those for the elastic process. The t distribution has been fitted to an exponential function with a slope parameter 5.8 ± 0.3 (stat.) ± 0.5 (syst.) GeV-2. The ratio of the elastic to proton-dissociative ρ0 photoproduction cross section is 2.0 ± 0.2 (stat.) ± 0.7 (syst.).

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Supernumerary Teeth In Pleistocene, Recent, And Hybrid Individuals Of The Spermophilus Richardsonii Complex (Sciuridae), H. Thomas Goodwin Jan 1998

Supernumerary Teeth In Pleistocene, Recent, And Hybrid Individuals Of The Spermophilus Richardsonii Complex (Sciuridae), H. Thomas Goodwin

Faculty Publications

A supernumerary distal upper molar, always expressed bilaterally, occurred in Pleistocene (one of 204) and Recent (five of 1,667) specimens of the Spermophilus richardsonii complex. Among Recent specimens with the abnormality, three of four with known provenance came from adjacent colonies with hybrids of S. richardsonii (Richardson's ground squirrel) and S. elegans (Wyoming ground squirrel). Elsewhere, the trait was rare in S. richardsonii (one of 947) and absent in S. elegans (out of 668). Affected individuals exhibited normal P3-M2, but two aberrant teeth distal to M2. Aberrant teeth exhibited a mosaic of features typical of M2, M3, and atypical of …

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Correlating Crystalloid Fluid Resuscitation And Postoperative Ventilatory Time In The Coronary Artery Bypass Graft Patient, Linda S. Dunnam Jan 1998

Correlating Crystalloid Fluid Resuscitation And Postoperative Ventilatory Time In The Coronary Artery Bypass Graft Patient, Linda S. Dunnam

Theses and Dissertations

No abstract provided.

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Utilization Of Genetic Counseling Services In North Dakota, Mary Ebertowski Jan 1998

Utilization Of Genetic Counseling Services In North Dakota, Mary Ebertowski

Theses and Dissertations

No abstract provided.

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Early Versus Late Extubation Of The Postoperative Coronary Artery Bypass Patient And Its Effect On Length Of Postoperative Hospital Stay, Eric L. Flaten Jan 1998

Early Versus Late Extubation Of The Postoperative Coronary Artery Bypass Patient And Its Effect On Length Of Postoperative Hospital Stay, Eric L. Flaten

Theses and Dissertations

No abstract provided.

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Health Related Attitudes Of People With Diabetes Living In Urban Versus Rural North Dakota, Patricia K. Freitag Jan 1998

Health Related Attitudes Of People With Diabetes Living In Urban Versus Rural North Dakota, Patricia K. Freitag

Theses and Dissertations

No abstract provided.

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Post-Cabg Delirium And Its Effect On Length Of Stay, Michele D. O'Donnell Frank Jan 1998

Post-Cabg Delirium And Its Effect On Length Of Stay, Michele D. O'Donnell Frank

Theses and Dissertations

No abstract provided.

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Primary Care Provider's Views Of Medication Compliance, Rachel Ann Koch Jan 1998

Primary Care Provider's Views Of Medication Compliance, Rachel Ann Koch

Theses and Dissertations

No abstract provided.

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Summer And Seasonal Movements And Habitats, Home Ranges And Buffer Zones Of A Central Minnesota Population Of Blanding's Turtles, Stephen Alan Piepgras Jan 1998

Summer And Seasonal Movements And Habitats, Home Ranges And Buffer Zones Of A Central Minnesota Population Of Blanding's Turtles, Stephen Alan Piepgras

Theses and Dissertations

No abstract provided.

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Physical Training And Functional Capacity In Elderly : Meta Analysis, Mary Jill Schaberg Jan 1998

Physical Training And Functional Capacity In Elderly : Meta Analysis, Mary Jill Schaberg

Theses and Dissertations

No abstract provided.

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The New York Times Coverage Of The United Nations Fourth World Conference On Women, Carla Frederica Almeida Santos Jan 1998

The New York Times Coverage Of The United Nations Fourth World Conference On Women, Carla Frederica Almeida Santos

Theses and Dissertations

No abstract provided.

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Quality Of Visit Perceived By Family Members Of Dementia Residents In The Nursing Home, Patricia L. Wetzel Jan 1998

Quality Of Visit Perceived By Family Members Of Dementia Residents In The Nursing Home, Patricia L. Wetzel

Theses and Dissertations

No abstract provided.

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Music As An Intervention With Anesthesia And Its Relationship To Post-Anesthesia Anxiety Levels, Anthony J. Watts Jan 1998

Music As An Intervention With Anesthesia And Its Relationship To Post-Anesthesia Anxiety Levels, Anthony J. Watts

Theses and Dissertations

No abstract provided.

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A Feminist Analysis Of Doris Lessing's The Golden Notebook, Jo Ann L Miller Jan 1998

A Feminist Analysis Of Doris Lessing's The Golden Notebook, Jo Ann L Miller

Theses and Dissertations

No abstract provided.

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Development Of A Fire Science Curriculum Program At The University Of North Dakota, Jamie Lisell Jan 1998

Development Of A Fire Science Curriculum Program At The University Of North Dakota, Jamie Lisell

Theses and Dissertations

No abstract provided.

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Variations In Health Promotion Practices Among Adult Hutterites, Ladean Morford Jan 1998

Variations In Health Promotion Practices Among Adult Hutterites, Ladean Morford

Theses and Dissertations

No abstract provided.

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Diadochokinetic Rate And Articulation Skill Among 3,4, And 5 Year Old Children, Terryann Mccurry Jan 1998

Diadochokinetic Rate And Articulation Skill Among 3,4, And 5 Year Old Children, Terryann Mccurry

Theses and Dissertations

No abstract provided.

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Crossing The Line Between Church And State, Barbara Honeyman Pierce Jan 1998

Crossing The Line Between Church And State, Barbara Honeyman Pierce

Theses and Dissertations

No abstract provided.

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A Case Against Electoral Reform : The Importance Of Our Two-Party System, Gary J. Estenson Jan 1998

A Case Against Electoral Reform : The Importance Of Our Two-Party System, Gary J. Estenson

Theses and Dissertations

No abstract provided.

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Identifying Health Care Needs Of The Resident Native American Student Population, Lawrence D. Blue Jan 1998

Identifying Health Care Needs Of The Resident Native American Student Population, Lawrence D. Blue

Theses and Dissertations

No abstract provided.

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The Effect Of Age And Gender On Length Of Hospitalization Of Coronary Artery Bypass Graft And Cardiac Valve Patients, Jacqueline Devine-Leiran Jan 1998

The Effect Of Age And Gender On Length Of Hospitalization Of Coronary Artery Bypass Graft And Cardiac Valve Patients, Jacqueline Devine-Leiran

Theses and Dissertations

No abstract provided.

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The Nature And Provision Of Instruction In Summary Writing For Students From Years 7-9, D. A. Bergin Jan 1998

The Nature And Provision Of Instruction In Summary Writing For Students From Years 7-9, D. A. Bergin

Theses: Doctorates and Masters

As students progress through our education system they are increasingly asked to independently comprehend and compose informational material to show evidence of their ability to use and learn from texts. One skill which facilitates students' abilities to learn from texts is summarizing. Research into summarizing suggests it is a complex skill needing explicit and systematic instruction. However, materials to which teachers turn to for advice on strategies and instruction do not always reflect the findings of research. This being the case, this study set out to investigate what teachers understood about the nature of summarizing and the extent to which …

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Redefining The Art Experience : From Static To Temporal Art Forms, Justine Mcknight Jan 1998

Redefining The Art Experience : From Static To Temporal Art Forms, Justine Mcknight

Theses: Doctorates and Masters

This research examines an approach to art making and viewing that questions the acceptance of the autonomous object in favour of a transient experience. It focuses specifically on work and writing from the 1960s by the American artist Robert Morris that attempted to alter the then predominant Formalist understanding of the art object as autonomous and self-referential. This investigation follows the formal and conceptual development of Morris' work (and that of associated artists Richard Serra and Rafael Ferrer) with particular focus on the shift from static objects to time-based and transient an-forms including film/video and installation. I address the influence …

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A Methodology For The Selection Of A Paradigm Of Reasoning Under Uncertainty In Expert System Development, Vivian Campbell Jan 1998

A Methodology For The Selection Of A Paradigm Of Reasoning Under Uncertainty In Expert System Development, Vivian Campbell

Theses: Doctorates and Masters

The aim of this thesis is to develop a methodology for the selection of a paradigm of reasoning under uncertainty for the expert system developer. This is important since practical information on how to select a paradigm of reasoning under uncertainty is not generally available. The thesis explores the role of uncertainty in an expert system and considers the process of reasoning under uncertainty. The possible sources of uncertainty are investigated and prove to be crucial to some aspects of the methodology. A variety of Uncertainty Management Techniques (UMTs) are considered, including numeric, symbolic and hybrid methods. Considerably more information …

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The Effect Of Lip-Slur Practice On Increasing Pitch Range In Brasswind Instrument Students, Robert L. Benton Jan 1998

The Effect Of Lip-Slur Practice On Increasing Pitch Range In Brasswind Instrument Students, Robert L. Benton

Theses: Doctorates and Masters

Lip-slur exercises comprise part of the practice routines of many professional and serious amateur brasswind players. There are several reasons why so many players practise lip-slurs. One of those reasons is the belief that lip-slurs contribute to the development of the brasswind high register. This study argues that while there is a vast amount of anecdotal evidence from many authors widely deemed to be influential in the form of method books or writings that lip-slurs can contribute to the development of the brasswind high register, there has been little research to support this widely held belief. This study used a …

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Predicting The Severity Of Radiation Skin Reactions In Women With Breast Cancer, Davina Porock Jan 1998

Predicting The Severity Of Radiation Skin Reactions In Women With Breast Cancer, Davina Porock

Theses: Doctorates and Masters

Skin reactions are unavoidable side effects of radiotherapy for breast cancer that may limit the amount of treatment a patient is able to receive. As well, the discomfort associated with the treatment may negatively affect the patient's quality of life and their willingness to complete a course of treatment that typically extends over seven weeks. Prior literature suggests that variations in patients' tissue reactions to radiation may be related to Individual patient characteristics. Before health care providers can intervene to prevent or minimise skin reactions, a clinical model that helps predict which patients will experience more skin reactions is needed. …

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Perceptions Of Elder Abuse Among Australian Elderly Individuals And General Practitioners, Marianela Cuevas Jan 1998

Perceptions Of Elder Abuse Among Australian Elderly Individuals And General Practitioners, Marianela Cuevas

Theses: Doctorates and Masters

Research available on elder abuse is limited. There continues to be a lack of uniformity in how to define and identify the problem, as well as how to intervene. One group which continues to be excluded from the process of gaining knowledge on the issue of elder abuse is the elderly themselves. As general practitioners are the primary source of health care for older people, their perspectives on elder mistreatment should be explored as well. The first objective of this study was to examine whether differences existed in the perceived severity of potentially abusive situations between three groups of older …

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A Comparative Study Of Controversy In The Education Systems Of Western Australia, Victoria And New Zealand: Community Participation In Government Schools 1985-1993, Anne M. Coffey Jan 1998

A Comparative Study Of Controversy In The Education Systems Of Western Australia, Victoria And New Zealand: Community Participation In Government Schools 1985-1993, Anne M. Coffey

Theses: Doctorates and Masters

The release of Better Schools in Western Australia: A Programme for Improvement (1987), in line with other public sector agency reforms; contained a prescription for the restructuring of the Education Department of Western Australia from 11 bureaucratic to a corporate management system of school administration. These changes were intended to render the education system, and especially schools more flexible, responsive and accountable. Among the proposals for educational restructuring was a new opportunity for community participation through ''school based decision making groups." Contemporaneously, the education systems in Victoria and New Zealand were undergoing similar reforms. The research agenda for this thesis …

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Early Discharge Planning : Primiparous Women's Perceptions Of Their Readiness For Going Home, Graeme N. Boardley Jan 1998

Early Discharge Planning : Primiparous Women's Perceptions Of Their Readiness For Going Home, Graeme N. Boardley

Theses: Doctorates and Masters

Early discharge for women after childbirth was introduced in Australia approximately ten years ago. Early discharge involves going home from hospital within three days of giving birth. Since its introduction, early discharge has been the subject of much debate. Previous research has argued the cost effectiveness and safety of early discharge, but little has been done to examine this phenomenon from the human aspect. An exploratory study of first time mothers, in an early discharge programme was undertaken to address how these women felt in relation to their readiness for going home. A purposive sample of twenty Caucasian, English speaking …

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Hearsay Hazards In The American Criminal Trial: An Adversary-Oriented Approach, Gordon Van Kessel Jan 1998

Hearsay Hazards In The American Criminal Trial: An Adversary-Oriented Approach, Gordon Van Kessel

Faculty Scholarship

No abstract provided.

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