Digital Commons Network^™

Modeling, Simulation And Analysis Of Multi-Barge Flotillas Impacting Bridge Piers, Peng Yuan

University of Kentucky Doctoral Dissertations

The current design code governing bridge structure resistance to vessel impact loads in the U.S. is the American Association of State Highway and Transportation Officials' (AASHTO) Guide Specification and Commentary for Vessel Collision Design of Highway Bridges. The code stipulated method, based on Meir-Dornberg's equivalent static load method, is usually not warranted because of insufficient data on the impact load histories and wide scatter of the impact force values. The AASHTO load equations ignore certain fundamental factors that affect the determination of impact forces and bridge dynamic responses. Some examples of factors that are omitted during standard impact force …

Three Dimensional Finite Element Modeling Of Pavement Subsurface Drainage Systems, Yinhui Liu

University of Kentucky Doctoral Dissertations

Pavement subsurface drainage systems (PSDS) are designed to drain the entrapped water out of pavement. To investigate the effects of various factors on the performance of PSDS, three dimensional models were developed using the finite element method to simulate the unsaturated drainage process in pavement. The finite element models were calibrated using the field information on outflow, peak flow, layer saturations, and time to drain. Through a series of parametric analyses, the factors that significantly influence the performance of PSDS were screened out, and a set of recommendations were made to improve our current drainage practices.The effects of pavement geometry …

On The Properties And Complexity Of Multicovering Radii, Andrew Eugene Mertz

University of Kentucky Doctoral Dissertations

People rely on the ability to transmit information over channels of communication that aresubject to noise and interference. This makes the ability to detect and recover from errorsextremely important. Coding theory addresses this need for reliability. A fundamentalquestion of coding theory is whether and how we can correct the errors in a message thathas been subjected to interference. One answer comes from structures known as errorcorrecting codes.A well studied parameter associated with a code is its covering radius. The coveringradius of a code is the smallest radius such that every vector in the Hamming space of thecode is contained in …

The Status And Quality Of Secondary Science Teaching And Learning In Lagos State, Nigeria, Taiwo O. Ogunmade

Theses: Doctorates and Masters

This study investigated and described the status and quality of secondary science teaching and learning in Lagos State, Nigeria. Quantitative and qualitative methods were used for gathering research data. Quantitative data were obtained from the surveys of 78 junior secondary science teachers and 500 junior secondary students from three Local Education Districts of Lagos State. Qualitative data on the other hand, were gathered from analysis of national and state curriculum documents and from focus groups of science teachers, school principals, parent association representatives, education officers, teacher educators, representatives of the professional association for science teachers and representatives of examination bodies …

The Quest For A Formula : Parliamentary Remuneration In Western Australia, Michael J. Britton

Theses: Doctorates and Masters

The Western Australian Payment of Members Act 1900 was promulgated upon two tenets, namely, that Members of Parliament should be compensated for their services to society and that other Australian colonies were already receiving some form of compensation. The premise stipulated that all people, regardless of economic background should be given an opportunity to fulfil the honourable duly of a Representative. Remuneration in this thesis covers the minimalist advent of Parliamentary Remuneration whereby Mrs were compensated by way of a basic salary to the current multifaceted Parliamentary Remuneration which encompasses various structures, processes and is often overarched by complicated determinative …

Investigating Information Management Weaknesses In A Local Government Organisation: A Critical Hermeneutic Ethnographic Case Study Of Internet Documents From Information Warfare And Legal Perspective(S), Edward E. Andre

Theses: Doctorates and Masters

In this thesis I develop an approach to analyse and interpret internet documents belonging to a particular organisation in a State of Australia. My intention in the research is to find ways to protect a local government organisation from litigation and other threats due to weaknesses in information management on the internet. Based on Gadamer's (1985) approach to the interpretation of text discourse, this thesis is a critical hermeneutic ethnographic case study of one local government organisation investigating internet docunents from information warfare and legal perspective(s).

Promoting Metacognitive Regulation Through An On-Line Environment, Mark Mcmahon

Theses: Doctorates and Masters

The constantly evolving world of work is causing a great deal of emphasis on the need for graduating students to demonstrate a range of generic skills to enable them to be both employable and able to adapt easily to new requirements. However, research indicates that secondary schooling is not preparing students adequately for learning independently.

This study sought to explore strategies for developing and supporting the metacognitive skills of higher education students. In particular, it sought to explore how university students' cognitive self-regulation could be supported in an on-line environment designed to engage them in the self-monitoring integral to metacognitive …

A Comparative Analysis Of Locally Owned Banks In The United Arab Emirates, Catherine Budd

Theses: Doctorates and Masters

All UAE banks perform the dual role of intermediaries 'for both the money and capital markets. They are entering a crucial stage of banking" development towards global competition with new banking laws imminent and the Basel II Capital acc6'rd being , , effective by December 2006. Within a challenging climate of financial transparency and limited data availability, .this research provides a benchmark and a unique league table of efficiency performances between 1998 and 2003 for comparative analysis between local banks in the UAE for present and future operational policymakers and researchers. This study offers an analysis and insight into UAE …

Character Cars : How Computer Technology Enhances Learning In Terms Of Arts Ideas And Arts Skills And Proceses In A Year 7 Male Visual Arts Education Program, Gemma E. Scarparolo

Theses: Doctorates and Masters

'The possibilities that the technology can offer are seemingly endless and remain to be fully explored in [visual] art education." (Callow. 2001. p,43) The aim of this research is to investigate whether the integration of Visual Arts Technology Tools (TECH-TOOLS) into Traditional Visual Arts Programs (TRAD-['ROG) enhance the students' learning in terms of Arts Ideas (AI) and Arts Skills and Processes (ASP) and whether it is a cost effective option for Western Australian primary schools. To determine whether it is worth the inclusion of TECH-TOOLS in terms of enhancing learning. this research will statistically state whether the combination of TECH-TOOLS …

An Exploratory Case Study Using An Expert Learning Process Designed To Promote Number Sense In A Year 6 Classroom, Paula Mildenhall

Theses: Doctorates and Masters

not available

Survivability Through Pre-Configured Protection In Optical Mesh Networks, Quoc V. Phung

Theses: Doctorates and Masters

Network survivability is a very important issue, especially in optical networks that carry huge amount of traffic. Network failures which may be caused by human errors, malfunctional systems and natural disaster (eg. Earthquakes and lightening storms), have occurred quite frequently and sometimes with unpredictable consequences. Survivability is defined as the ability of the network to maintain the continuity of service against failures of network components. Pre-configuration and dynamic restoration are two schemes for network survivability. For each scheme, survivability algorithms can be applied at either Optical Channel sublayer (Och) known as link-based. Or, Optical Multiplex Section sublayer (OMS) known as …

Towards A Pro-Active Model Of Professional Development For Tertiary Level Teachers In The United Arab Emirates, Lynn J. Nicks-Mccaleb

Theses: Doctorates and Masters

This body of work identifies the professional development needs of teachers at Abu Dhabi Men's College in the UAE as their role in the classroom and pedagogical trends change in response to the needs of the 21st century global workforce. The aim of the research was to identify what pedagogical changes had impacted the teaching and learning environment at the college and subsequently to identify strategies and professional development models to prepare the teachers for dynamic developments in their teaching and learning environment. A pragmatic, interpretive approach was taken in the study, drawing on qualitative data to explore ways to …

A Study Of Assessment Policies And Practices Of Directors In Pre-Kindergarten Programs In West Virginia., Janet Dozier

Graduate Theses, Dissertations, and Problem Reports (ETD)

As education for young children becomes more standards-based there has been a cry for more assessments. Developmentally appropriate assessment for young children has been defined by the twelve guidelines developed by the National Association for Young Children. The purpose of this study was done by surveying the 440 pre-kindergarten program directors in West Virginia regarding his/her perception of importance and implementation of those national assessment guidelines and followed by ten structured interviews of directors across the program descriptions. The study found the implementations of guidelines to be positively correlated to the director's perception of importance. Further it found that all …

An Attack-Resistant Approach To Vulnerability Scanner Design., David Phillip Shaver

Graduate Theses, Dissertations, and Problem Reports (ETD)

Vulnerability scanners are used to scan and detect known vulnerabilities in computer systems. An attacker can exploit these vulnerabilities to compromise the security of a system and potentially cause harm. Thus, it is vital to detect and repair any vulnerabilities that exist. Vulnerability scanners, however, are themselves susceptible to attack. If an attacker were to compromise a scanner, they could force it ignore the vulnerabilities of other systems. They could then compromise these other computers by exploiting the undetected vulnerabilities. Due to the importance of preventing such false positives in scan results, this research proposes a new approach to vulnerability …

Measurement Of Charm Fragmentation Ratios And Fractions In Photoproduction At Hera, S. Chekanov, M. Derrick, S. Magill, S. Miglioranzi, B. Musgrave, J. Repond, R. Yoshida, Margarita C. K. Mattingly, N. Pavel, A. G. Yagües Molina, P. Antonioli, G. Bari, M. Basile, L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, G. Cara Romeo, L. Cifarelli, F. Cindolo, A. Contin, M. Corradi, S. De Pasquale, P. Giusti, G. Iacobucci, A. Margotti, A. Montanari, R. Nania, F. Palmonari, A. Pesci, A. Polini

Faculty Publications

© 2005, Springer New York LLC. All rights reserved. The production of D∗+, D0, D+, D+s and Λ+c charm hadrons and their antiparticles in ep scattering at HERA was measured with the ZEUS detector using an integrated luminosity of 79 pb−1. The measurement has been performed in the photoproduction regime with the exchanged-photon virtuality Q2 < 1GeV2 and for photon-proton centre-of-mass energies in the range 130 3.8GeV and pseudorapidity |η(D,Λc)| < 1.6. The production cross sections were used to determine the ratio of neutral and charged D-meson production rates, Ru/d, the strangeness-suppression factor, γs, and the fraction of charged D mesons produced in a vector state, Pdv. The measured Ru/d and γs values agree with those obtained in deep inelastic scattering and in e+e- annihilations. The measured Pdv value is smaller than, but consistent with, the previous measurements. The fractions of c quarks hadronising as a particular charm hadron, f(c → D, Λc), were derived in the given kinematic range. The measured open-charm fragmentation fractions are consistent with previous results, although the measured f(c → D*+) is smaller and f(c → Λ+c) is larger than those obtained in e+e- annihilations. These results generally support the hypothesis that fragmentation proceeds independently of the hard sub-process.

Habitat Patch Occupancy Dynamics Of Glaucous-Winged Gulls (Larus Glaucescens) I: A Discrete-Time Model, Karl W. Phillips, Smruti P. Damania, James L. Hayward, Shandelle M. Henson, Clara J. Logan

Faculty Publications

Diurnal habitat occupancy dynamics of Glaucous-winged Gulls were evaluated in a system of six habitats on and around Protection Island, Washington. Data were collected on the rates of gull movement between habitat patches, and from these data the probabilities of transitions between habitats were estimated as functions of tide height and time of day. A discrete-time matrix model based on the transition probabilities was used to generate habitat occupancy predictions, which were then compared to hourly census data. All model parameters were estimated directly from data rather than through model fitting. The model made reasonable predictions for two of the …

Energy-Sensitive Machining Parameter Optimization Model, Deepak Prakash Gupta

Graduate Theses, Dissertations, and Problem Reports (ETD)

Manufacturing industries are one of the most important elements in the economic growth and stability of any country. It is very important that the process parameters are given proper attention to maximize the value addition and increased profits for these industries. Parameter optimization for different manufacturing processes has been a challenging and interesting problem in the past. Many researchers have studied the problem of optimizing the process parameters for the turning process. In all the cases studied so far, no one has considered the significance of energy required and its cost for the machining process as an integral part of …

Development Of A Transparent Indenter Measurement System And Indentation Analysis For Material Mechanical Property Evaluation, Chuanyu Feng

Graduate Theses, Dissertations, and Problem Reports (ETD)

Since Tabor showed the application of the spherical indentation approach to obtain material post-yielding true stress-strain curves, the indentation technique has been investigated to determine mechanical properties besides hardness measurement. With the development of various thin film materials, depth-sensing indentation is often applied to evaluate mechanical properties of thin film materials. However, indentation testing is a complicated mechanical process and analytical solutions are difficult to obtain. As a result, much of the understanding of the indentation process has been acquired through experiments and finite element simulations. Thus accurate measurement of indentation parameters is critical in the determination of surface mechanical …

Gallium Nitride-Based Blue Laser Diodes, Sridhar Kuchibhatla

Graduate Theses, Dissertations, and Problem Reports (ETD)

Group III nitride wide band gap semiconductors have recently attracted considerable attention due to their applications for optical devices operating in the blue and UV wavelength regions. Nitride materials are stable at high temperatures and also chemically stable. Analysis of InGaN based blue laser diodes is required for the research and development of future deep UV laser diodes for bio-sensing applications. The conventional multiple quantum wells suffer from inhomogeneous carrier distribution across quantum wells. This inhomogeneous distribution increases the threshold current density of the laser diode. This project addresses the issue through the design of a novel structure for the …

Graph Algorithms For The Haplotyping Problem, Yunkai Liu

Graduate Theses, Dissertations, and Problem Reports (ETD)

Evidence from investigations of genetic differences among human beings shows that genetic diseases are often the results of genetic mutations. The most common form of these mutations is single nucleotide polymorphism (SNP). A complete map of all SNPs in the human genome will be extremely valuable for studying the relationships between specific haplotypes and specific genetic diseases. Some recent discoveries show that the DNA sequence of human beings can be partitioned into long blocks where genetic recombination has been rare. Then, inferring both haplotypes from chromosome sequences is a biologically meaningful research topic, which has compounded mathematical and computational problems.;We …

Adaptive Edge-Based Prediction For Lossless Image Compression, Rahul G. Parthe

Graduate Theses, Dissertations, and Problem Reports (ETD)

Many lossless image compression methods have been suggested with established results hard to surpass. However there are some aspects that can be considered to improve the performance further. This research focuses on two-phase prediction-encoding method, separately studying each and suggesting new techniques.;In the prediction module, proposed Edge-Based-Predictor (EBP) and Least-Squares-Edge-Based-Predictor (LS-EBP) emphasizes on image edges and make predictions accordingly. EBP is a gradient based nonlinear adaptive predictor. EBP switches between prediction-rules based on few threshold parameters automatically determined by a pre-analysis procedure, which makes a first pass. The LS-EBP also uses these parameters, but optimizes the prediction for each pre-analysis …

Generic Multimodal Biometric Fusion, Yash Shah

Graduate Theses, Dissertations, and Problem Reports (ETD)

Biometric systems utilize physiological or behavioral traits to automatically identify individuals. A unimodal biometric system utilizes only one source of biometric information and suffers from a variety of problems such as noisy data, intra-class variations, restricted degrees of freedom, non-universality, spoof attacks and unacceptable error rates. Multimodal biometrics refers to a system which utilizes multiple biometric information sources and can overcome some of the limitation of unimodal system. Biometric information can be combined at 4 different levels: (i) Raw data level; (ii) Feature level; (iii) Match-score level; and (iv) Decision level. Match score fusion and decision fusion have received significant …

Integrated Stability Mapping System For Mines, Quanxi Wang

Graduate Theses, Dissertations, and Problem Reports (ETD)

The Integrated Stability Mapping System (ISMS) was developed as an engineering tool to quantify the geologic and geo-mechanical information of mines, and to integrate the critical stability influence factors into an overall stability index for use in mine planning and support design. It is generally understood that the inherent underground roof stability is determined by the interaction of both the given geologic characteristics and the local stress influences. Form this perspective, in this dissertation, the need for an integrated stability mapping system is established through investigating the traditional and current hazard mapping practices. In order to fulfill this need, computer …

National Cave And Karst Research Institute 2004-2005 Annual Report, National Cave And Karst Research Institute

KIP Articles

No abstract provided.

Assessing The Accuracy Of The Differential Assessment Of Autism And Other Developmental Disorders (Daadd) As A Screening Tool, Christine Jurgens

Masters Theses

Professionals are encountering children with developmental disorders more often and with more diversity than ever before. Disorder labels are being introduced increasingly early in a child's life in order to qualify them for services. However, characteristics of developmental disorders overlap significantly in young children, with features beginning to differentiate as the child enters formal education at kindergarten age. Debate continues on whether the autistic spectrum is being over-diagnosed, based on increasing incidence and prevalence statistics.

Research has suggested that developmental disorders impact multiple developmental areas, including language, socialization, sensory, motor, and medical/physical aspects and skills. Therefore, distinguishing one developmental disorder …

Cover, Copy And Compare Method Versus Copy, Cover, And Compare Method For Teaching Mathematics: A Comparative Analysis, Joel Grafman

Masters Theses

This study compared the fluency and accuracy rates produced when using the Cover, Copy, and Compare and Copy, Cover, and Compare interventions to complete subtraction math problems. Two second grade classrooms consisting of 20 or more students participated in the study. Participants were administered a pretest, Cover, Copy, and Compare worksheet, Copy, Cover, and Compare worksheet, and a posttest. Results revealed significantly higher digits correct per second (i.e. fluency) scores on the posttest and Cover, Copy, and Compare worksheets when compared to the pretest and Copy, Cover, and Compare worksheets with no difference in the errors per second (i.e. accuracy) …

A Formative Evaluation Of The Alpha Sigma Tau Sorority's National Recruitment Program In Its Inaugural Year, Colleen Elizabeth Coffey

Masters Theses

This study was conducted as a formative evaluation of the Alpha Sigma Tau sorority's national recruitment program. The researcher sought to determine the effectiveness of all aspects of the program over the course of the last year, to discover any perceived needs among undergraduate members and chapters that were not met over the course of the last year, and to create recommendations for the program to be implemented during the 2006-2008 biennial term. Through a mixed method design the study evaluated the program using qualitative and quantitative survey data, focus groups, and existing data on membership intake from the National …

Trends Of Employment-Based Health Insurance: Why Did The Coverage For Private-Sector Workers Decrease During Economic Boom, Yan Ni

Masters Theses

After a decade of erosion of employment-based health insurance coverage in the American population, the overall employment-based health insurance coverage increased beginning in the mid-1990s when the strong economy occurred. According to the previous studies, the labor market and health insurance premium are primary determinants of the coverage rate. However, in spite of the tight labor market and non-existent health care cost inflation (the growth of health insurance premiums is close to the growth of wages), the health insurance coverage of private-sector workers continued to decline. Since the private sector workers are the bulk of the population who benefit from …

Early Determinants Of Women In The It Workforce: A Model Of Girls’ Career Choices, Monica Adya, Kate Kaiser

Management Faculty Research and Publications

Purpose – To develop a testable model for girls’ career choices in technology fields based on past research and hypotheses about the future of the information technology (IT) workforce.

Design/Methodology/Approach – Review and assimilation of literature from education, psychology, sociology, computer science, IT, and business in a model that identifies factors that can potentially influence a girl’s choice towards or against IT careers. The factors are categorized into social factors (family, peers, and media), structural factors (computer use, teacher/counselor influence, same sex versus coeducational schools), and individual differences. The impact of culture on these various factors is also explored.

Findings …

2005 Commencement Program, Seattle University

Commencement Programs

No abstract provided.