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An Experimental Investigation Of The Finite Time Efficiency Of A Peltier Refrigeration Device, Thomas Schneider

Dissertations and Theses

Since the need of energy conservation has become more and more urgent in the past decades, there has been an increased interest in the study and development of more efficient energy conversion systems. One of the fields that have arisen from that endeavor is a branch of physics called Finite Time Thermodynamics (FIT). It may be said that FIT was initiated through the famous paper by Curzon and Ahlborn (1975) that established new bounds on the efficiency of a finite time Carnot heat engine. Before, the traditional treatments gave a fundamental upper limit on the efficiency of any heat engine. …

Hydrogeology Of An Alluvial Aquifer In The Blue Lake Area, East Multnomah County, Oregon, James Mitchell Wilkinson

Dissertations and Theses

This thesis evaluates the hydraulic relationship between the Blue Lake gravel aquifer, the Columbia River, and Blue Lake. Hydrogeology, water levels, and stable isotopes were used to establish these hydraulic relationships.

A Descriptive Study Of Sexual Health Attitudes And Practices Among Adolescent And Young Adult Male County Health Department Clients, Russel Douglas Robbins

Dissertations and Theses

The purpose of this study is to look at selected sexual attitudes, beliefs, and sexual health practices among adolescent and young adult males. Specifically, the study examines adolescent and young adult males' sexual development and experiences, contraceptive use, sexually transmitted disease (STD) prevention practices, and, to a limited extent, public health clinic utilization.

An Examination Of The Long-Term Effects Of Authorized Training Programs On Injured Workers In The State Of Oregon, Grace Alice Han

Dissertations and Theses

The worth of rehabilitation programs should be measured in terms of their lasting impact on long-term employment. Vocational rehabilitation programs nationally and internationally appear to be falling short of their goal of long-term gainful employment. Competitive employment options for the injured worker appear to have leveled out, the pool of unemployed disabled workers appears to be rising, litigation and adversarial relationships are beginning to dominate the rehabilitation process, and costs of vocational rehabilitation are escalating. Increasingly, interest has focused on the long-term influence of vocational rehabilitation, particularly on the costly training programs, and on the employment and economic potential of …

Establishing Practical Limits To Crime Control Through Environmental Design, Gerald Dennis Brock

Dissertations and Theses

There are myriad approaches to control crime that are currently being advocated by one group or another in contemporary American society. These range from punitive programs of incarceration to global kinds of social intervention to change societal "root causes" of crime. One of the proposals which attracted much attention in the 1960's was the crime control through environmental design perspective hinted at by persons such as Jane Jacobs and developed in detail by Oscar Newman. The idea of defensible space is straightforward: certain kinds of environmental design can have a significant deterrent effect on crime and criminals. The recent literature, …

Evaluating The Role Of Geogrids In The Rehabilitation Of Cracked Dams Via Numerical Techniques, Kelly Dean Uhacz

Dissertations and Theses

Collapse and cracking of debris earth embankment dams is a serious problem in areas of the arid Western United States. The use of geogrids is evaluated in this thesis as a possible solution to prevent or reduce the amount of damage to the structures from collapse and cracking.

An apparatus was designed, constructed, and instrumented to electronically acquire data to evaluate the behavior of geogrids during pullout tests under various normal stresses. The pullout tests were also modelled using numerical techniques to correlate physical test data with numerical test data. Understanding the behavior of the geogrid, in both the physical …

Behavior Of An Ion In A Bubble In The Ground State, Joung Hoon Oh

Dissertations and Theses

Deuterons might be trapped in a bubble embryo which occur s due to statistical fluctuation in heavy water. The size of the bubble embryo is expected to be an order of a small molecule. The ground state energy level which the deuteron may occupy in the bubble is calculated by solving the Schroedinger equation, and by considering the interaction between the trapped deuteron by a spherical bubble and the surrounding polarized liquid medium (heavy water). From the dependence of the energy eigenvalue of the ground state on the bubble radius, the pressure exerted on the bubble wall is obtained. It …

The Dimension Of A Chaotic Attractor, Roslyn Gay Lindquist

Dissertations and Theses

Tools to explore chaos are as far away as a personal computer or a pocket calculator. A few lines of simple equations in BASIC produce fantastic graphic displays. In the following computer experiment, the dimension of a strange attractor is found by three algorithms; Shaw's, Grassberger-Procaccia's and Guckenheimer's. The programs were tested on the Henon attractor which has a known fractal dimension. Shaw's and Guckenheimer's algorithms were tested with 1000 data points, and Grassberger's with 100 points, a data set easily handled by a PC in one hour or less using BASIC or any other language restricted to 640K RAM. …

Interpretation Of The Thermal Behavior Of Groundwater In An Alluvial Terrace: Bonneville Dam, Columbia Gorge, Oregon, Richard Stephen Malin

Dissertations and Theses

Groundwater temperature data, collected at an alluvial terrace located on the Oregon shore of the Columbia River downstream from Bonneville Darn, was analyzed in order to characterize and formulate a conceptual model of the thermal data for the groundwater system in the terrace. There is concern that an unlined entrance channel for a new navigation lock, to be located down the middle of the terrace, will widen the range of temperatures in the fish hatchery-groundwater supply. The analysis of temperature behavior in the terrace supports the hydraulic observations derived from analysis of pump test data, but with greater definition of …

A Comparison Of The Vocabulary Needs Of Speaking And Nonspeaking Twins, Dana Lynette Hamburg

Dissertations and Theses

Children with severe physical disabilities often do not have the capabilities for oral communication. Therefore, the vocabulary needs of nonspeaking children has been a subject of research in the area of augmentative communication for a number of years. The idea of allowing children with disabilities the opportunity for expression and communication is one not easily ignored. Obtaining vocabulary items, however, that are useful to nonspeaking disabled children that also meet normal language acquisition standards has been a concern. This study specifically addresses this concern by looking into the vocabulary issues of twins. The purpose of this research project is to …

The Angler As Environmentalist: Oregon Trout And The Fight To Save The Wild Salmon Of The Columbia River, John P. Rosenberg

Dissertations and Theses

This paper traces the history of Oregon Trout, an environmental organization in Portland, Oregon, from its beginning in the fall of 1983 through the spring of 1990, when it filed petitions on behalf of four stocks of Columbia and Snake River salmon under the Endangered Species Act. It focuses on Oregon Trout's efforts to preserve the wild salmon of the Columbia River as a contemporary example of anglers acting as environmentalists to conserve threatened or endangered species. According to historian John Reiger in American Sportsmen and the Origins of Conservation, hunters and anglers have been acting in this role …

The Impact Of Organizational Climate On The Relationship Between Job Characteristics And Job Satisfaction: An Empirical Assessment Of Public Sector Managers, Unsuk Song

Dissertations and Theses

The central purpose of this study was to explore the relationship between job characteristics and job satisfaction, and the impact of organizational climate on that relationship in the public sector. The subjects of the study were all Oregon State Government managers at and above the level of supervisor in all of the state agencies and the judicial branch.

This study was conducted with the use of a survey. Six hundred and fifty-six (656) questionnaires were returned for a response rate of 66 percent. The questionnaire consisted of four parts. The first part was drawn from the Organizational Climate Questionnaire; the …

Reciprocating Transformations, Joyce A. Bryerton

Dissertations and Theses

The paintings in this thesis project began with a study of various representational images, both personal and symbolic. It included the exploration of assorted media and different styles of execution in a search for imagery to represent the scope of my life experience. This search involved a method of working that excluded preconceived images. The original images evolved into an abstract state which alludes directly to the figurative and organic nature of the earlier work.

Transient Heat Transfer, Eric Roth

Dissertations and Theses

With the advent of the new high Tc superconductors, liquid nitrogen will be one of the preferred cryogens used to cool these materials. Consequently, a more thorough understanding of the heat transfer characteristics of liquid nitrogen is required. In our investigations we examine the transient heating characteristics of liquid nitrogen to states of nucleate and film boiling under different liquid flow conditions. Using a platinum hot wire technique, it is verified that there is a premature transition to film boiling in the transient case at power levels significantly lower than under steady state nucleate boiling conditions. It is also shown …

The Spatial Patterning Of Residential Differentiation In Metropolitan Community : The Case Of Kaohsiung City In Taiwan, 1982, Chih-Jen Chen

Dissertations and Theses

The urban growth process produces a complex socio-geographic division of labor among the component parts of the urban community. During this process, each subarea of the community differentiates from the other parts in its physical and demographic characteristics, becomes specialized functionally and structurally. The spatial patterning of the urban community is the result of this differentiation process.

Late Holocene Paleoseismicity Along The Northern Oregon Coast, Mark Edward Darienzo

Dissertations and Theses

Marsh paleoseismological studies were conducted in four bays (Necanicum, Nestucca, Siletz, and Yaquina) along the northern Oregon coast and compared with completed studies in two other bays (Netarts and Alsea). Coseismically buried peats were identified in all bays, based on 1) abrupt contacts, decreases in organic content, increases in sand content, increases in beach sand, and changes in diatom assemblages, all from the peat to the overlying sediments, 2) distinct sandy layers and key plant macrofossils, such as Triglochin, above the buried peat, and 3) widespread correlation of the buried peats within the bay. The stratigraphy and the ages and …

Formation Of Superhexagonal Chromium Hydride By Exposure Of Chromium Thin Film To High Temperature, High Pressure Hydrogen In A Ballistic Compressor, Yi Pan

Dissertations and Theses

The interaction of hydrogen with metals has great environmental significance in problems ranging from the catastrophic failure of materials due to hydrogen embrittlement to safe and efficient storage of hydrogen as a metal hydride. Chromium (Cr) is widely used as an alloying agent to produce materials such as stainless steel and as an electroplated coating on materials to prevent corrosion and to minimize wear. Hydrogen which co-deposits with chromium during electroplating forms hexagonal close packed CrH or face centered cubic CrH2 which cracks the deposit. The behavior of hydrogen in Cr, especially the crystal structure modifications of metal Cr when …

Development And Analysis Of A Model For Change In The Workplace, Using Quasi-Experimentation With Computer Professionals In Northwestern Investor Owned Utilities, John Ronald Thompson

Dissertations and Theses

Computer professionals have been agents of change in many organizations. In some cases the role inadvertently became theirs as they were the ones at the vanguard of implementing the new information processing technology in organizations. While in other cases they were the catalysts for change, to force new methods/procedures onto lethargic organizations. While introducing change on others in the organization and adapting to new technological changes themselves, the computer professionals have not really had to face a significant change in their status, power, or importance to the organization. The introduction of the personal computer has brought about significant change in …

Freeway Control Via Ramp Metering: Development Of A Basic Building Block For An On-Ramp, Discrete, Stochastic, Mesoscopic, Simulation Model Within A Contextual Systems Approach, Mohamed Yaser Alkadri

Dissertations and Theses

One of the most effective measures of congestion control on freeways has been ramp metering, where vehicle entry to the freeway is regulated by traffic signals (meters). Meters are run with calibrated influx rates to prevent highway saturation. However, recent observations of some metering sites in San Diego, CA indicate that metering, during peak hour demand, is helping freeway flow while sometimes creating considerable traffic back-ups on local streets, transferring congestion problems from the freeway to intersections. Metering problems stem largely from the difficulty of designing an integrated, dynamic metering scheme that responds not only to changing freeway conditions but …

Programs For At-Risk Students In The Washington County (Oregon) Schools: A Policy Study, John Young

Dissertations and Theses

This study develops recommendations for school district administrators and policy makers regarding policies and programs for students at risk of school failure. The study develops a descriptive picture of policies and programs for at-risk students in Washington County school districts and evaluates those policies and programs against criteria for effective policies and programs in order to understand the degree to which such policies and programs implemented in Washington County school districts correspond to criteria associated with effective practices reported in the literature. The study identifies 23 such criteria and numerous indicators associated with each. Data collection, analysis and evaluation were …

The Role Of Tourism In Development: A Case Study Of Turkey, Habib Alipouraghtapeh

Dissertations and Theses

Until quite recently "tourism" was principally a feature of, and was largely confined to, the developed countries. During the past two decades, however, tourism has become an income earning alternative to the many Third World countries, and many have capitalized on the industry which has become known as a "passport to development." In recent years the situation has worsened for these former exporters of primary agricultural products. These products are suffering from the general fall in world commodity prices and competition from larger and more efficient agricultural producers. In addition, the world economic impact has been translated to ever-burgeoning foreign …

A Comparison Of Socio-Political Attitudes Of Older Urban Women: The 1910-1924 Cohorts, Elizabeth Slack Ikehara

Dissertations and Theses

The central theme of this study is that because of the changing life styles and the macro-events which occurred after World War I these years were a watershed. The women born in the three five-year cohorts from 1910 through 1924 were at different stages of maturity and awareness as particular economic and political events occurred. The social and political climates were different for each of these cohorts of women. Therefore there would be discernible differences in attitudes and opinions among the cohorts. A literature review indicated three models for the formation of social attitudes and political opinions. The "Personality Types" …

The Development And Testing Of An Instrument To Measure Client Satisfaction Of Child Protective Service Families, James Michael White

Dissertations and Theses

The purpose of this study was to develop and test an instrument to measure client satisfaction among families who are clients of a child protective services agency. With the growing numbers of families coming into contact with CPS agencies, the burgeoning numbers of children in foster care, and the increasing attention to the effectiveness of services within this population, client feedback is one approach that has been largely ignored by CSP administrators. The basic problem this dissertation addressed is the issue of obtaining feedback from the involuntary client, such as the family in a child abuse case. Specifically, this dissertation …

The Effect Of Road Investment On Economic Development: A Case Study Of The Oregon Counties, Ameer Mohammed Al-Alwan

Dissertations and Theses

Despite its significance and frequent mentioning in the literature, the relationship between road investment and economic development has never been clearly understood. A significant number of scholars in this field have always emphasized the need for further research to examine this complex and dynamic relationship. Historically, investment in transportation networks has played a great role in the development of cities, regions, and nations. This positive view is attributed to the indispensable role that water transportation, and then rail transport, played in the early development of Europe and the United States. In recent years, many scholars, as well as policy makers, …

An Exploratory Analysis Of Certain Characteristics Of Policewomen: A Second Look, Harry Oliver White Jr.

Dissertations and Theses

Female police officers are relatively new to the profession of law enforcement. Prior to 1968, the very few who were employed by police agencies were not permitted to perform the full range of police duties. Subsequent to that time their number has increased so that today they account for approximately 8.3 percent of the total sworn police population. There have been numerous studies which have attempted to identify the sociopsychological characteristics of male police officers. For example, Neiderhoffer reported in 1967 that male officers rate high in authoritarianism, anomia, job dissatisfaction, and choose police work for job security reasons. Very …

Creative Drama As An Instructional Strategy In Adult Christian Education, Darlene Richards Graves

Dissertations and Theses

This study reviews the tenents of adult learning. Christian education and creative drama and presents the observation that there are parallel objectives in each of these three major areas. Noting that creative drama is rarely used in adult Christian education, which is primarily cognitive-based and lecture-discussion oriented, the study proposes the application of creative drama strategies to provide an alternative experiential learning process and therefore create a drama strategies to provide an alternative experiential learning process and therefore create a balance of focus between cognitive, affective, reflective and active learning styles in adult Christian education. It also suggests that through …

Perceptions Of Psycho-Social Factors That Affect Retirement Decision-Making, Darlene Zickefoose

Dissertations and Theses

The purpose of the study was to examine retirement decision making of certificated employees (N = 284 respondents N = 241) of the Beaverton School District in a near retirement age category. The Beaverton School District is a large suburban school district near Portland, Oregon. It currently serves over 25,000 students and employs approximately 2,600 certificated and classified employees. The study answered the following questions:

1. Can psycho-social factors be identified that will enable the Beaverton School District to help potential retirees make an informed decision to retire?
2. What personal factors affect a person's decision to retire?
3. Does it matter, in …

Development Of A Direct, Low Pressure, Laser-Induced Fluorescence Measurement Technique For No2., Ambient Measurements And Urban Nox Chemistry, Linda Acha George

Dissertations and Theses

Nitrogen oxides control the global formation of ozone in the lower atmosphere and influence the much higher levels of ozone formed in areas subjected to photochemical air pollution. As an important member of the nitrogen oxide family, N02 plays a significant role in serving as the only known source of ozone (through photolysis) in the lower atmosphere and as sink for HO via the formation of nitric acid. Ozone can be destroyed by reaction with another member of the nitrogen oxide family, nitric oxide (NO), to reform N02. This cycle between NO, N02 and 03 is known as the NOx-03 …

Development And Applications Of High Resolution Kinetic Atmospheric Pressure Ionization Mass Spectrometry In Atmospheric Chemistry, David Michael Myton

Dissertations and Theses

Much important work has been done to understand reaction pathways and identify products, yields, and reaction rates for atmospheric oxidation processes. Non-methane hydrocarbons (NMHCs) are the most significant of the organic compounds present in the atmosphere from a chemical perspective and are released into the atmosphere from both natural and anthropogenic sources. The oxidation of these hydrocarbons by hydroxyl radical HO generates products that may themselves be toxic, that play a major role in the formation of photochemical smog, and that to a lesser extent contribute to the formation of acid precipitation. NMHCs have chemical reactivities many times that of …

Solvent And Substituent Effects On The Redox Potentials Of Several Substituted Tetraphenylporphyrins, Robert Arthur Ransdell

Dissertations and Theses

Tetraphenylporphyrins can be used to absorb visible light and pass on their excitation energy to electron transfer agents. The purpose of this research has been to investigate our ability to understand and control the energetics of porphyrin derivatives in order to use their electron transfer ability to harness the energy of sunlight. Shifts in the redox (reduction and oxidation) potentials of tetraphenylporphyrins result from variations in the substituents attached at the para- position of the phenyl rings of tetraphenylporphyrins, as well as variations in the state of ionization of those substituents, and the solvent in which the reactions are carried …