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The Fatigue Problems Of Cracks Subjected To Obliquely Incident Stress Waves, I-Chung Weng

Dissertations

Catastrophic failure of aircraft and other structures are often caused by undetected cracks. Fracture mechanics has been developed to augment traditional static and fatigue design. In the static theory of fracture mechanics, extensive treatment has been given to the stress distribution around sharp cracks and notches under various loading conditions. Previous works on the problems of dynamic loadings are not accurate in dealing with singularities at high frequencies. The numerical solutions become unrealistic at high frequencies in many practical applications.

To address the need to obtain the stress intensity factor in high frequency dynamic loading situations, we studied the use …

The Perspectives Of The Woman/Nurse/Executive Working In The Managed Care Environment Of Southern California, Cheryl Lynn Brandi Dnsc, Ms, Msn, Rn

Dissertations

The purpose of this study was to explore the perspectives of the woman/nurse/executive working in the managed care environment of Southern California. This research was extremely timely because (a) Southern California leads the nation in managed care market penetration, (b) changes in health care financing have resulted in a prolific expansion of nurse executive responsibilities, and (c) nurse executive experiences regarding increased responsibilities have not been researched. Role expansion impacts both male and female nurse executives, but female nurse executives must confront the dilemma of functioning in administrative domains which have been largely dominated by men. Knowledge about their experiences …

The Experiences Of Taiwanese Women Caregiving For Parents-In-Law, Shu-Yuan Chao Dnsc

Dissertations

Using grounded theory, a semi-structured in-depth interview was conducted to explore the experiences of Taiwanese women who were caregivers for their parents-in-law. Thirty-one Taiwanese women aged 23 to 58 participated in this study. Just Doing was identified as the core category to indicate the caregivers' striving process once they committed to their in-laws' care. Recognizing Duty, Experiencing Trials, and Responding to Caregiving were subcategories and reflected how a caregiver perceived her role, how she was affected by caregiving tasks, and what responses she had to the caregiving situation. The findings also suggested that caregiving behaviors were influenced by cultural expectations …

Correlates Of Staff Nurse Work Satisfaction In Hospitals With Shared Governance, Mary Kay Flynn Dnsc, Rn, Ccrn

Dissertations

Lack of staff nurse participation in hospital decision-making has been cited as a major reason for the dissatisfaction in nursing. Shared governance has been proposed as an organizational model that provides staff nurses with both the structure and the mechanism for having increased decision-making authority. The purpose of this study was to investigate the relationship of organizational culture, perceived importance of involvement and actual involvement in decision-making, the discrepancy between importance and involvement, staff nurse years of involvement in shared governance, control over nursing practice, and work satisfaction among staff nurses working in hospitals with shared governance. A descriptive, correlational …

Role Expectation Of Chief Nurse Executive Officers In Integrated Healthcare Systems Located In Highly Managed Care Markets, Daniel L. Gross Dnsc

Dissertations

The healthcare industry is undergoing radical transformation. Healthcare's transformation is characterized by new patterns of organization, alliance, management, administration, and governance. Traditional fee-for-service reimbursement strategies are rapidly dissolving and managed health care is proliferating. Managed care and managed competition are forcing hospitals and healthcare providers to reduce expenses and identify improved methods for healthcare delivery. Integrated healthcare delivery systems (IDSs) and networks are at the center of healthcare reform. Chief Nurse Executive Officers (CNEOs) are increasingly finding themselves in roles within complex IDSs located within highly managed care markets (HMCMs). This new work environment is altering old and mandating new …

The Work Of Living With Hiv: A Study Of Binational Groups, Christina Joy Dnsc

Dissertations

The purpose of this investigation was to study the experience of individuals who live with and manage HIV infection and AIDS. The context of living with HIV/AIDS, the prevailing conditions, the actions/strategies used, and the consequences of the actions were considered using grounded theory methodology and dimensional analysis. A purposeful sample of 21 individuals HIV positive or diagnosed with AIDS from San Diego, California and Tijuana, Mexico were interviewed using semi-structured questions. Data were analyzed using open and axial coding, the constant comparative method, and dimensional analysis. The work of living with HIV emerged as the central dimension within the …

Living With Changing Health: Perimenopause Among Chinese Women In Taiwan, Lee-Ing Tsao Dnsc, Mnsc, Rn

Dissertations

The purpose of this qualitative study was to generate theory about women's perimenopausal life experiences. Thirty-five Taiwanese women aged 40 to 59 who perceived themselves as perimenopausal and who were not using hormone therapy were interviewed. Data were generated from interviews which were conducted in Mandarin. Living with Changing Health was the core category for describing and guiding the process of perimenopause. During this process, Awareness was identified as the antecedent condition. Once the woman became aware, she would begin the process of living with her changing health. This process would be marked by action and interaction among the categories …

Determinants Of Health-Promoting Lifestyle Among Nurses In Taiwan, Chou Chuan-Chiang Yao Dnsc, Ms, Rn

Dissertations

This two-phase study was undertaken to: (1) determine the relationships of self-efficacy, perceived health status, perceived social support, age, marital status, education, work shift, work setting, and years employed as a registered nurse (RN) to the practice of a health-promoting lifestyle; (2) determine the combination of predictor variables explaining the variance in the practice of a health-promoting lifestyle; and (3) investigate other personal and environmental cues and characteristics related to health-promoting lifestyles among nurses (N = 218) in Taiwan. Findings of the quantitative approach in Phase One indicated that a health-promoting lifestyle was significantly related to self-efficacy, perceived health status, …

Outcomes Related To The Quality Of Life Of Oncology Patients Aged 65 And Older Following Initial Cancer Treatment, Rosemary Clare Zivic

Dissertations

The purpose of this study was to determine whether there were changes in the quality of life of cancer patients aged 65 and older (N>488) following initial treatment for cancer. A Quality of Life conceptual model was developed. Quality of Life refers specifically to physical, social, and functional status. The study analyzed data from a larger longitudinal data set and compared data for patient’s with prostate, breast, lung, and colon cancer at three observation points: (1) three month Recall, (2) after surgery and prior to chemotherapy or radiation (Wave I), and (3) fourteen weeks following surgery, during chemotherapy or …

Caroline Bartlett Crane And Progressive Era Reform: A Socio-Historical Analysis Of Ideology In Action, Linda J. Rynbrandt

Dissertations

This dissertation is a sociohistorical analysis of women and social reform in the Progressive Era. Until recently, the role of women has been virtually invisible in accounts of Progressive social reform. While this is no longer the case, considerable questions remain. Using the archival records of one woman, Caroline Bartlett Crane (1858-1935), which document her professional, intellectual and personal life, I describe her contribution to social reform and early sociology. I analyze how her life and work reveals a greater understanding of current feminist debates and other social, historical and political questions.

A Systems Approach To Performance Quality: An Application To Higher Education, Tobias Lafleur

Dissertations

Graduate-student teaching apprentices (TAs) in the psychology department at a university in Michigan conducted seminars in an advanced undergraduate-level psychology course. All were members of the department’s behavior analysis training system (BATS). BATS was an integrated series of courses and practicum experiences designed to achieve three main goals: recruiting, training, and maintaining the skills of competent behavior analysts. Twenty-five different tasks performed by the TAs were analyzed and measured prior to an intervention aimed at their improvement. Informal observation suggested that failure to complete these tasks reduced BATS’ ability to meet its larger goals. Three well-known systems analysis models were …

The Military-Bureaucracy Relationship In Nigeria: A Study Of Public Policy Making And Implementation, Robert Aziakpono Dibie

Dissertations

The Federal Government of Nigeria’s Structural Adjustment/Make-or-Buy policy was introduced in July 1986 to accelerate the development of Nigerian industrial capacity by contracting government R & D out to the private sector. This study expands the empirical and theoretical analyses of development policy and its implementation that have traditionally relied on motives of "rationality" (costs/benefits) to explain bureaucratic behavior. It examines and juxtaposes the military-dominated policy making apparatus with the traditional bureaucracy, which has the responsibility for the execution of public policy. It also attempts to make some contribution to Nigerian and comparative literature in the field of industrial development …

Reconstruction Of Wetland Hydrology Dynamics Using Tree Rings, Allan P. Hascall Iii

Dissertations

Increment core samples were collected and examined to test the hypothesis that the history of punctuated or intermediate-term changes in wetland soil-moisture conditions can be reconstructed from the annual growth-ring record of trees. The hypothesis is based on plant physiological principles that indicate a relationship between water surplus stress and impaired physiological activity that could lead to reduced growth.

Sampling sites were selected for their ostensible historic hydrologic variability and the availability of documentation of hydrologic disturbances. A conceptual model was developed by which trees were sampled along a hydrotopographic gradient for comparison of radial stem growth in uplands versus …

The Relationship Between Course Outcomes And The Factors Of Retention As Determined By Webb’S Model Of Student Persistence, Jan K. Fields

Dissertations

This study looked at the differences in various factors of college retention for students who successfully completed all courses in a particular semester as compared to students who did not successfully complete at least one course during that same semester. The college retention factors were taken from Webb's (1988) Model of Student Retention and were assessed through the use of student records and two survey instruments developed by Noel/Levitz (Schreiner & Juillerat, 1994; Stratil, 1988).

The study was conducted at Muskegon Community College during the 1995 Fall Semester using four groups of students: (1) students enrolled in high success vocational …

Decision Making And The Felony Offender: A Cognitive Approach, Marlene O’Hara

Dissertations

The purpose of this study was to assess the effectiveness of the theory of cognitive self-change as it applies to increasing the successful completion rate of felony offenders sentenced to a probation half-way house. Subjects used were young, males who had been convicted of non-violent crimes and who were ordered to complete the Alternative Directors Residential Probation program as part of their probation order.

The group of residents who entered Alternative Directions in October, 1994 was given an intensive ten hour course using cognitive decision making techniques during their first two weeks in residence. The groups of residents entering the …

Analytical Solutions Of Openings Formed By Intersection Of A Cylindrical Shell And An Oblique Nozzle Under Internal Pressure, Hengming Cai

Dissertations

Since several decades ago, many authors have published their research results about local stress distributions of shells and shell-nozzles both analytically and numerically. However, there has not been a published paper, which deals with analytical solutions of cylindrical shell and oblique nozzle, even though in the case of openings formed by intersection of a cylindrical shell and an oblique nozzle.

A comprehensive analytical study of local stress factors at the area of openings formed by intersection of a cylindrical shell and an oblique nozzle under internal pressure is presented in this dissertation.

By means of traditional approach in theory of …

Adaptive Distributed Detection With Applications To Cellular Cdma, Jian-Guo Chen

Dissertations

Chair and Varshney have derived an optimal rule for fusing decisions based on the Bayesian criterion. To implement the rule, probabilities of detection P_D and false alarm P_F for each detector must be known, which is not readily available in practice. This dissertation presents an adaptive fusion model which estimates the P_D and P_F adaptively by a simple counting process. Since reference signals are not given, the decision of a local detector is arbitrated by the fused decision of all the other local detectors. Adaptive algorithms for both equal probable and unequal probable sources, for independent …

Least Space-Time First Scheduling Algorithm : Scheduling Complex Tasks With Hard Deadline On Parallel Machines, Bo-Chao Cheng

Dissertations

Both time constraints and logical correctness are essential to real-time systems and failure to specify and observe a time constraint may result in disaster. Two orthogonal issues arise in the design and analysis of real-time systems: one is the specification of the system, and the semantic model describing the properties of real-time programs; the other is the scheduling and allocation of resources that may be shared by real-time program modules.

The problem of scheduling tasks with precedence and timing constraints onto a set of processors in a way that minimizes maximum tardiness is here considered. A new scheduling heuristic, Least …

Synthesis And Characterization Of Lpcvd Sic Films Using Novel Precursors, Mahalingam Bhaskaran

Dissertations

A unique low pressure chemical vapor deposition (LPCVD) process has been developed to synthesize amorphous and crystalline SiC films using environmentally benign chemicals. The interrelationships governing the process variables, compositions and select properties of the resulting films were established. Such films can be used to produce high quality mask membrane for x-ray lithography. These films can also be used in fabricating high power electrical devices, and hetrojunction devices in conjunction with silicon.

Amorphous SiC films were synthesized using a single precursor, ditertiarybutylsilane, at temperatures below 850°C. Compositional analysis performed on these deposits revealed that, in the deposition temperature range of …

Bilinear Time-Frequency Representations Of Heart Rate Variability And Respiration During Stress, Rindala Saliba

Dissertations

Recently, joint time-frequency signal representation has received considerable attention as a powerful tool for analyzing a variety of signals and systems. In particular, if the frequency content is time varying as in signals of biological origin which often do not comply with the stationarity assumptions, then this approach is quite attractive. In this dissertation, we explore the possibility of better representation of two particular biological signals, namely heart rate variability (HRV) and respiration. We propose the use of time-frequency analysis as a new and innovative approach to examine the physical and mental exertion attributed to exercise. Two studies are used …

Evaluation Of Environmental Characteristics Of Wtp Residuals For Disposal In Monofills, Ping Tian

Dissertations

Disposal of water treatment plant (WTP) have raised great concerns due to the stringent water quality standards and environmental regulations, and limited availability of land for ultimate disposal. The ultimate disposal of water treatment plant residuals by using monofill may be one of the most economical, and feasible options. Design and operation of such a monofill will be simple because of the uniformity of the characteristics of WTP residuals.

The objectives of this project were to determine the environmental characteristics of WTP residuals and to apply these characteristics for the design of monofills and development of the metal leaching model …

Safe Code Transfromations For Speculative Execution In Real-Time Systems, Mohamed Mohamed Younis

Dissertations

Although compiler optimization techniques are standard and successful in non-real-time systems, if naively applied, they can destroy safety guarantees and deadlines in hard real-time systems. For this reason, real-time systems developers have tended to avoid automatic compiler optimization of their code. However, real-time applications in several areas have been growing substantially in size and complexity in recent years. This size and complexity makes it impossible for real-time programmers to write optimal code, and consequently indicates a need for compiler optimization. Recently researchers have developed or modified analyses and transformations to improve performance without degrading worst-case execution times. Moreover, these optimization …

Non-Linear Evaluation Of Concrete-Filled Steel Tubular Columns, Mohammad Hassan Shams

Dissertations

Concrete-filled steel tubular (CFT) columns have become increasingly popular in structural applications due to their high strength, high ductility, and large energy absorption capacity. These structural properties are the result of integral behavior of the concrete core and the steel tube. This research provides an analysis of the interaction of the concrete core and the steel tube in CFT columns.

While there have been many experimental studies of CFT columns, there has been no analytical work modeling the confining effect of the steel tube on the concrete core. Furthermore, current design procedures tend to underestimate the ultimate strengths of CFTs …

Massively Parallel Reasoning In Transitive Relationship Hierarchies, Yugyung Lee

Dissertations

This research focuses on building a parallel knowledge representation and reasoning system for the purpose of making progress in realizing human-like intelligence. To achieve human-like intelligence, it is necessary to model human reasoning processes by programs. Knowledge in the real world is huge in size, complex in structure, and is also constantly changing even in limited domains. Unfortunately, reasoning algorithms are very often intractable, which means that they are too slow for any practical applications. One technique to deal with this problem is to design special-purpose reasoners. Many past Al systems have worked rather nicely for limited problem sizes, but …

Shaped Charges Having A Porous Tungsten Liner-An Experimental And Theoretical Study Of Metal Compression, Jet Formation And Penetration Mechanics, Brian Edward Fuchs

Dissertations

The use of porous tungsten as a liner for shaped charges to improve their penetration was proposed by Ki-Hwan Oh in his invention disclosure "Shock Extrusion of Ingots from Powders or Solids", at the New Mexico Institute of Mining and Technology, Socorro NM on June 7, 1988. The intention was to increase the ductility of the normally brittle metal by heating the liner to a high temperature by shock compaction during its acceleration just before jet formation.

The feasibility of increasing the ductility of tungsten in this way is the subject of the present study. The theory and prior experimental …

An Investigation Of The Utility Of Using Local Curriculum-Based Measurement Norms Versus Group Standardized Norms To Predict Students At Riskfor Academic Failure In Reading And Mathematics, Lara E. Druckman

Dissertations

No abstract provided.

Performing The Self: Subjectivity, Feminist Theory, And Political Praxis, Ann Victoria Dolinko

Dissertations

No abstract provided.

The Impact Of Work On Gay Male Identity Among Male Flight Attendants, Kay V. Adams

Dissertations

No abstract provided.

The Acquisition Of Critical Thinking Skills And Personal Qualities In Behavior Disordered Students In Real World Environments Versus Structured Classroom Settings, Janice Ledonne Alexander

Dissertations

No abstract provided.

Risk Factors Associated With Suicide Probability In Hiv Positive And Aids Patients, Kenneth W. Jackson

Dissertations

No abstract provided.