Digital Commons Network^™

Exclusive Electroproduction Of Ρ0 And J/Ψ Mesons At Hera, J. Breitweg, S. Chekanov, 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, L. Cifarelli, F. Cindolo, A. Contin, N. Coppola, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci

Faculty Publications

Exclusive production of ρ0 and J/ψ mesons in e+p collisions has been studied with the ZEUS detector in the kinematic range 0.25 < Q2 < 50 GeV2, 20 < W < 167 GeV for the ρ0 data and 2 < Q2 < 40 GeV2, 50 < W < 150 GeV for the J/ψ data. Cross sections for exclusive ρ0 and J/ψ production have been measured as a function of Q2, W and t. The spin-density matrix elements r0400, r11-1i and Re r510 have been determined for exclusive ρ0 production as well as r0400 and r041-1 for exclusive J/ψ production. The results are discussed in the context of theoretical models invoking soft and hard phenomena.

Measurement Of Inclusive D*± And Associated Dijet Cross Sections In 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, L. Cifarelli, F. Cindolo, A. Contin, N. Coppola, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, G. Laurenti

Faculty Publications

Inclusive photoproduction of D*± mesons has been measured for photon-proton centre-of-mass energies in the range 130 < W < 28OGeV and photon virtuality Q2 < IGeV2. The data sample used corresponds to an integrated luminosity of 37 pb-1. Total and differential cross sections as functions of the D* transverse momentum and pseudorapidity are presented in restricted kinematical regions and the data are compared with next-to-leading order (NLO) perturbative QCD calculations using the "massive charm" and "massless charm" schemes. The measured cross sections are generally above the NLO calculations, in particular in the forward (proton) direction. The large data sample also allows the study of dijet production associated with charm. A significant resolved as well as a direct photon component contribute to the cross section. Leading order QCD Monte Carlo calculations indicate that the resolved contribution arises from a significant charm component in the photon. A massive charm NLO parton level calculation yields lower cross sections compared to the measured results in a kinematic region where the resolved photon contribution is significant.

Using Systematic Thinking To Choose And Evaluate Evidence, Robert J. Griffin

College of Communication Faculty Research and Publications

No abstract provided.

Nonlinear Constrained Optimizer And Parallel Processing For Golden Block Line Search, Duc T. Nguyen, Wilson H. Tang, Yeou K. Tung, Hakizumwami B. Runesha

Civil & Environmental Engineering Faculty Publications

Generalized exponential penalty functions are constructed for the multiplier methods in solving nonlinear programming problems. The non-smooth extreme constraint Gext is replaced by a single smooth constraint Gs by using the generalized exponential function (base a>1). The well-known K.S. function is found to be a special case of our proposed formulation. Parallel processing for Golden block line search algorithm is then summarized, which can also be integrated into our formulation. Both small and large-scale nonlinear programming problems (up to 2000 variables and 2000 nonlinear constraints) have been solved to validate the proposed algorithms.

Machine Vision Routines For Finding Objects Guided By A Pointer, Jade Yang

Theses and Dissertations

No abstract provided.

Transactions Of The Nebraska Academy Of Sciences Table Of Contents: Volume 25 (1999)

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Editorial Contents

Nebraska Academy of Sciences Officers, Policy Committee ................. ii

Editorial Board ................. iv

Membership Objectives and Friends of the Academy ................. v

Nebraska Association of Teachers of Science ................. vi

Preparation of manuscripts ................. inside back cover

Papers

Using omissive faults to obtain local convergence in partially connected networks (M. H. Azadmanesh and A. W. Krings) ................. 1

New floristic records for Nebraska-5 (Steven B. Rolfsmeier, Robert F. Steinauer, and David M. Sutherland) ................. 15

A key to dicotyledonous rosettes of eastern Nebraska (Phillip D. Moore) ................. 23

The brine shrimp Artemia franciscana in closed microalgal-based microcosms (biospheres) …

Deciding About Agent Mobility Using A Performance Cost Model, Dalia Fakher Elmansy

Archived Theses and Dissertations

No abstract provided.

A Critical Analysis Of Devolution And The Corporate Reform Of Teachers' Work, Patrick O'Brien

Theses: Doctorates and Masters

The corporate transformation of bureaucratic public education in Western Australia commenced in the late 1980s. The reforms announced in the Better Schools Report (1987) aimed to devolve responsibility to schools for the purpose of improving the efficiency and effectiveness of public education. Designed to be responsive, adaptable, flexible and accountable, the administrative style accompanying the reforms is described as corporate managerialism. Devolution has impacted heavily on schools and teachers' work. Evidence presented in this thesis suggests that the corporate values and practices that dominate the organisation and management of schools create personal and professional conflict for many classroom teachers. Devolution …

The Effect Of Nursing Interventions On Thermoregulation And Neuromotor Function In Very Low Birthweight Infants, Leanne Monterosso

Theses: Doctorates and Masters

The prone position is used routinely in neonatal intensive care units worldwide in the nursing of preterm infants because of reported beneficial psychological effects This position can, however, lead to development of flattened posture very low birthweight (VLBW) infants and contributes to both short and longer term implications for functional motor development of upper and lower extremities. To date limited research has been undertaken to investigate methods of reducing flattened posture and its related negative outcomes temperature instability is also a problem for VLBW infants and no nappy exists that meets postural size and thermoregulation requirements. The purpose of this …

Teacher Receptivity To System Wide Change: The Introduction Of Student Outcome Statements In Secondary Schools In Western Australia, Rose Moroz

Theses: Doctorates and Masters

The study has three aims. One is to investigate teachers’ receptivity to the use of Student Outcome Statements in Western Australian government secondary schools. The dependent variable is receptivity towards the use of Student Outcome Statements and is measured in four aspects: Overall Feelings, Attitudes, Behaviour Intentions and Behaviour. Two is to investigate the relationships between receptivity, as the dependent variable and ten independent variables: non-monetary cost benefits, alleviation of fears and concerns, significant other support, feelings compared to the previous system, shared goals (shared teaching goals and cohesiveness), collaboration (team teaching, involvement in decision making and teacher collaboration) and …

Analysis Of Increases In Fishing Power In The Western Rock Lobster (Panulirus Cygnus) Fishery, John Fernandez

Theses: Doctorates and Masters

The western rock lobster, Panulirus cygnus, fishery represents a significant commercial asset to Western Australia, and it is therefore important that appropriate strategies are developed to effectively manage it. Because the fishery has a very high level of exploitation, researchers and managers rely significantly on annual stock assessments which are based on catch and effort data. This study will identify and assess the effects that changes in fishing power factors (e.g. advances in fish-finding technology) have had on estimates of catch and effort. The fishing power increases can be used to adjust nominal fishing effort to produce a time series …

An Adaptive Hierarchical Fuzzy Logic System For Modelling And Prediction Of Financial Systems, Mark Kingham

Theses: Doctorates and Masters

In this thesis, an intelligent fuzzy logic system using genetic algorithms for the prediction and modelling of interest rates is developed. The proposed system uses a Hierarchical Fuzzy Logic system in which a genetic algorithm is used as a training method for learning the fuzzy rules knowledge bases. A fuzzy logic system is developed to model and predict three month quarterly interest rate fluctuations. The system is further trained to model and predict interest rates for six month and one year periods. The proposed system is developed with first two, three, then four and finally five hierarchical knowledge bases to …

Development Of A Model For Smart Card Based Access Control In Multi-User, Multi-Resource, Multi-Level Access Systems, David Shaw

Theses: Doctorates and Masters

The primary focus of this research is an examination of the issues involved in the granting of access in an environment characterised by multiple users, multiple resources and multiple levels of access permission. Increasing levels of complexity in automotive systems provides opportunities for improving the integration and efficiency of the services provided to the operator. The vehicle lease / hire environment provided a basis for evaluating conditional access to distributed, mobile assets where the principal medium for operating in this environment is the Smart Card. The application of Smart Cards to existing vehicle management systems requires control of access to …

The Measurement Of Classroom Music Learning Using An Outcomes Framework In Western Australian Schools, Beverley J. Pascoe

Theses: Doctorates and Masters

This study addresses the problem of a lack of reliable and systematic methodology for evaluating progress in classroom music, using an outcomes framework, in primary and secondary schools in Western Australia. An innovative range of assessment tasks was developed for use at system, school or classroom level in order to develop a Music Achievement Scale, so that in the future, meaningful reporting of student outcomes in music, in relation to The Arts Student Outcome Statements (Education Department of Western Australia, 1996), can occur. Music tasks were tested with a representative sample of 2191 government primary school students from Years 3 …

The Response Of Secondary Students From Non-English Speaking Backgrounds To A Visual Arts Course, Jean O. Aitken

Theses: Doctorates and Masters

Interest in multiculturalism has been expressed by educators for a number of years. Much of the literature concerning multiculturalism in visual arts education calls for the adoption of a culturally inclusive curricula in order to meet the needs of all students. In his consideration of conceptions of curriculum, Eisner (1988) made reference to a preferred body of knowledge which often excludes students from minority groups within society. Many Australian schools are experiencing increases in enrolments of students from non-English speaking backgrounds (NESB). These students may themselves be immigrants or the children of one or both parents born in another country. …

Confrontation And Identity In The Fiction Of J.M. Coetzee, Dawn Grieve

Theses: Doctorates and Masters

This thesis is an examination of the fictional works of J.M. Coetzee to date. By focusing my gaze upon either the lack of encounter or the encounters between the 'Self' and the 'Other', I explore the relationship between confrontation and the fluid formation and erosion of identity. This exploration takes place against a dual background: the history of the apartheid government in South Africa, the legacy of oppression and the post-apartheid opportunities and challenges; and Coetzee's own acknowledgement of complicity with the past and commitment to a reconciled future. This study not only examines a broad range of criticism on …

Urban Aboriginal Children In Sport: Experiences, Perceptions And Sense Of Self, Cheryl S. Kickett-Tucker

Theses: Doctorates and Masters

The purpose of this study was to describe the sense of self for a group of urban Western Australian Aboriginal children through analysing their perspectives and experiences in school sport and physical education. A symbolic interaction inquiry paradigm complemented with qualitative data collection methods was utilised. Informal conversational interviews and nonparticipant observations were employed. Interviews were conducted with participants and those whom they reported as their significant others. Participants were also observed in the school sport setting during physical education classes and intra and inter school sport competitions. Eight Western Australian Aboriginal children who resided in an urban suburb of …

Barbadian Teachers' Personal Practical Knowledge About Advocated Pedagogic Practices Used In The Education Of The Under-Fives, Sonja M. Anderson

Theses: Doctorates and Masters

This study investigated the personal practical knowledge of twenty-one Barbadian teachers in relation to a range of pedagogic practices advocated for use in the education of children under five years of age. The investigation of this knowledge was based on an interpretative perspective. The conceptual underpinning was framed by Personal Construct Psychology (Kelly, 1995), and its methodology, the repertory grid technique. The grid was formulated and used in a sample of schools with under-fives. Findings were clarified, confirmed and elaborated by the use of in-depth interviews conducted with teachers in their classroom settings. The findings revealed that teachers construed pedagogic …

The Psychological Impact Of Long-Term Unemployment In Mature-Aged Men : Volunteer Work As A Moderating Variable, Ming Yeu

Theses: Doctorates and Masters

Previous research has recognised the negative psychological distress associated with unemployment for older workers aged over 40 years, as they are considered to be more at risk of being unemployed for a longer duration than other age groups. Several moderating variables of the negative effects of unemployment such as age, length of unemployment and leisure participation have also been identified. In examining the experiences of unemployment with an Australian mature-aged group of men, this study also investigated the potential moderating effect of volunteer work participation that had been noted previously but had never been explored. One-hundred and eighteen men aged …

Development And Evaluation Of A Scaffolding Guide To Help Lower Secondary Science Students Use The Internet To Search For, Select And Organise Information For The Construction Of Personal Text, Andrea Tunks

Theses: Doctorates and Masters

The purpose of this study was to develop and evaluate a scaffolding guide to help lower secondary students use the internet to search for and organise information for the construction of personal text. An intact Year 10 science class participated in the study. Data were collected using the scaffolding guide completed by students, work samples, a questionnaire designed to elicit from students their perceptions about the research guide, observational notes made by the researcher and debriefing interviews conducted with the teacher and with a group of students. The study identified the skills needed by students to search for and select …

Capital Investment Decisions Of Large Industrial Firms In Major European Countries, Faith Yilmaz

Plymouth Business School Theses

Using large-company panel data, this thesis empirically analyses investment decisions in major European countries. We particularly concentrate on three issues: the taxation of capital in the EU, the role of agency costs of debt on investment decisions, and the empirical analyses of the investment-uncertainty relationship. First, based on a dynamic system in capital and Tobin's q ratio, some simplified analytical results are derived to simulate various tax policy effects on investment. Also, for a single investment project, a model is developed to consider jointly the role of uncertainty and irreversibility in the taxation of capital. The simulation results cast doubt …

Time, Uncertainty, And The Law Of Corporate Reorganizations, John M. Czarnetzky

Fordham Law Review

No abstract provided.

Have You Hedged Today? The Inevitable Advent Of Consumer Derivatives, Carolyn H. Jackson

Fordham Law Review

No abstract provided.

Intellectual Property, Contracts, And Reverse Engineering After Procd: A Proposed Compromise For Computer Software, Anthony J. Mahajan

Fordham Law Review

No abstract provided.

Measurement Of The Diffractive Cross Section In Deep Inelastic Scattering Using Zeus 1994 Data, 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, L. Cifarelli, F. Cindolo, A. Contin, N. Coppola, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, G. Laurenti

Faculty Publications

The DIS diffractive cross section, dσdiffγ*p→XN/dMx, has been measured in the mass range Mx < 15 GeV for γ*p c.m. energies 60 < W < 200 GeV and photon virtualities Q2 = 7 to 140 GeV2. For fixed Q2 and Mx, the diffractive cross section rises rapidly with W, dσdiffγ*p→X N (Mx, W, Q2)/dMx ∝ Wadiff with adiff = 0.507 ± 0.034 (stat) +0.155-0.046 (syst) corresponding to a t-averaged pomeron trajectory of ̄αℙ = 1.127 ± 0.009 (stat) +0.039-0.012 (syst) which is larger than ̄αℙ observed in hadron-hadron scattering. The W dependence of the diffractive cross section is found to be the same as that of the total cross section for scattering of virtual photons on protons. The data are consistent with the assumption that the diffractive structure function FD(3)2 factorizes according to cursive greek chiℙFD(3)2(cursive greek chiℙ, β, Q2) = (cursive greek chi0//cursive greek chiℙ)nFD(2)2(β, Q2). They are also consistent with QCD based models which incorporate factorization breaking. The rise of cursive greek chiℙFD(3)2 with decreasing cursive greek chiℙ and the weak dependence of FD(2)2 on Q2 suggest a substantial contribution from partonic interactions.

Zeus Results On The Measurement And Phenomenology Of F2 At Low Cursive Greek Chi And Low Q2, J. Breitweg, S. Chekanov, 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, G. Abbiendi, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, N. Coppola, M. Corradi, S. De Pasquale, P. Giusti

Faculty Publications

Measurements of the proton structure function F2 for 0.6 < Q2 < 17 GeV2 and 1.2 × 10-5 < cursive Greek chi < 1.9 × 10 -3 from ZEUS 1995 shifted vertex data are presented. From ZEUS F2 data the slopes dF2/d ln Q2 at fixed cursive Greek chi and din F2/d ln(1/cursive Greek chi) for cursive Greek chi < 0.01 at fixed Q2 are derived. For the latter, E665 data are also used. The transition region in Q2 is explored using the simplest non-perturbative models and NLO QCD. The data at very low Q2 ≤ 0.65 GeV2 are described successfully by a combination of generalised vector meson dominance and Regge theory. From a NLO QCD fit to ZEUS data the gluon density in the proton is extracted in the range 3 × 10-5 < cursive Greek chi < 0.7. Data from NMC and BCDMS constrain the fit at large cursive Greek chi. Assuming the NLO QCD description to be valid down to Q2 ∼ 1 GeV2, it is found that the qq̄ sea distribution is still rising at small cursive Greek chi and the lowest Q2 values whereas the gluon distribution is strongly suppressed.

Forward Jet Production In Deep Inelastic Scattering 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, L. Cifarelli, F. Cindolo, A. Contin, N. Coppola, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, G. Laurenti

Faculty Publications

The inclusive forward jet cross section in deep inelastic e+p scattering has been measured in the region of cursive Greek chi-Bjorken, 4.5 · 10-4 to 4.5 · 10-2. This measurement is motivated by the search for effects of BFKL-like parton shower evolution. The cross section at hadron level as a function of cursive Greek chi is compared to cross sections predicted by various Monte Carlo models. An excess of forward jet production at small cursive Greek chi is observed, which is not reproduced by models based on DGLAP parton shower evolution. The Colour Dipole model describes the data reasonably well. …

Measurement Of High-Q2 Neutral-Current E+P Deep Inelastic Scattering Cross-Sections At Hera, J. Breitweg, S. Chekanov, M. Derrick, D. Krakauer, S. Magill, B. Musgrave, A. Pellegrino, J. Repond, R. Stanek, R. Yoshida, Margarita C. K. Mattingly, G. Abbiendi, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, N. Coppola, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, G. Laurenti

Faculty Publications

The e+p neutral-current deep inelastic scattering differential cross-sections dσ/dQ2, for Q2 > 400 GeV2, dσ/dx and dσ/dy, for Q2 > 400, 2500 and 10000 GeV2, have been measured with the ZEUS detector at HERA. The data sample of 47.7 pb-1 was collected at a center-of-mass energy of 300 GeV. The cross-section, dσ/dQ2, falls by six orders of magnitude between Q2 = 400 and 40000 GeV2. The predictions of the Standard Model are in very good agreement with the data. Complementing the observations of time-like Z° contributions to fermion-antifermion annihilation, the data provide direct evidence for the presence of Z° exchange in the …

Measurement Of Multiplicity And Momentum Spectra In The Current And Target Regions Of The Breit Frame In Deep Inelastic Scattering At Hera, J. Breitweg, S. Chekanov, M. Derrick, D. Krakauer, S. Magill, B. Musgrave, J. Repond, R. Stanek, R. Yoshida, Margarita C. K. Mattingly, G. Abbiendi, F. Anselmo, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, G. Castellini, L. Cifarelli, F. Cindolo, A. Contin, N. Coppola, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, G. Laurenti, G. Levi

Faculty Publications

Charged particle production in neutral current deep inelastic scattering (DIS) has been studied using the ZEUS detector. The evolution of the mean multiplicities, scaled momenta and transverse momenta in Q2 and cursive Greek chi for 10 < Q2 < 5120 GeV2 and cursive Greek chi > 6 × 10-4 has been investigated in the current and target fragmentation regions of the Breit frame. Distributions in the target region, using HERA data for the first time, are compared to distributions in the current region. Predictions based on MLLA and LPHD are inconsistent with the data.