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Steady State Analysis Of Tropospheric Chemistry, Wen Hsiung Pan

Dissertations and Theses

Hydroxyl radical HO plays a central role in controlling chemical processes in the troposphere. Current mechanisms are believed to accurately describe its formation, destruction and interaction with other atmospheric trace gases in clean air. Hydroperoxyl radical H0₂ is Iinked to HO in several chain processes and serves among other roles as a reservoir for HO. The relative concentration (H0₂/HO) in clean air is believed to be the order of 10². We here examine the conditions under which steady-state kinetics apply to HO₁ chemistry and derive simple relationships which can be used to predict HO and H0₂ concentration from measurable concentrations …

Modification Of The Ca²⁺ Release Channel From Sarcoplasmic Reticulum Of Skeletal Muscle, Hui Xiong

Dissertations and Theses

Muscle contraction and relaxation are controlled by the intracellular free Ca²⁺ concentration. The sarcoplasmic reticulum (SR) is an intracellular membrane system which regulates this internal free Ca²⁺ concentration. Responding to an electrical excitation of the cell surface membrane, the SR releases Ca²⁺ through a specific Ca²⁺ release channel, thus elevating the Ca²⁺ concentration inside muscle cell and causing the muscle to contract. Subsequent sequestration of Ca²⁺ by the SR Ca²⁺ pumps restores the resting state of the muscle cell. This research focuses on the Ca²⁺ release channel from skeletal muscle SR. The planar lipid bilayer technique was used to study …

Comparison Of Two Behavioral Models In Obesity Treatment, Nina Lucille Dominy

Dissertations and Theses

This study compared the results of two methods of behavioral treatment in combination with a very-low-calorie-diet in the treatment of obesity. Subjects were 28 male and 106 female patients admitted to the medically supervised fasting program at Risk Factor Clinic in Portland, Oregon. Subjects were matched by gender, percent over ideal body weight, and age. Subject group I received a smorgasbord of behavioral techniques from various group leaders in a 60-minute weekly session. Presentation was didactic and theoretical and subjects were accountable to themselves for utilization of the techniques. Subject group II participated in 90-minute weekly sessions with a primary …

The Transformation Of Urban Form: A Study Of The Interaction Among Policy, Urban Form, And Change In A Small City, Elton Herbert Schatz

Dissertations and Theses

The central theme of this Case Study is that social policy is changed by its interaction with the changing non-physical (socioeconomic) and physical (infrastructure) urban form of the city within which it is formulated, implemented, and evaluated.

The primary hypothesis of this Case Study is that the policy represented by the Main Street Program changes and is changed during its implementation in the changing non-physical (socioeconomic) and physical (infrastructure) urban form of the small city of Centralia, Washington.

The primary purpose of the Centralia Main Street Program is to involve Centralia in a community development process directed to changing the …

Politics And Education: The Nicaraguan Literacy Crusade, Teresa Squires Osborne

Dissertations and Theses

The Nicaraguan Literacy Crusade of 1980, carried out in the aftermath,of a long and destructive revolution, was able, in five months time, to decrease the nation's illiteracy rate from 50 percent to 13 percent. The newly fonned Nicaraguan government, recognizing the political nature of education, viewed its Literacy Crusade as a major step· in the development of a "new", post-revolutionary Nicaragua.

As a means of comparison, two other literacy campaigns are also examined: the Cuban campaign of 1961, and the UNESCO-sponsored Experimental World Literacy Programme, in place from 1965-1973.

The Cuban campaign served as a precursor to the Nicaraguan effort. …

Distribution Of Sand Within Selected Littoral Cells Of The Pacific Northwest, Don Joseph Pettit

Dissertations and Theses

Beach sand acts as a buffer to wave energy, protecting the shoreline from erosion. Estimates of the quantity and distribution of beach sand in littoral cells of the PNW are critical to the understanding and prediction of shoreline erosion or accretion. This study was initiated in order to: 1) document the distribution of sand in littoral cells of the Pacific Northwest; 2) determine the factors which have brought about these present distributions; and 3) address the relationship of beach sand distribution to shoreline stability.

Gravity Maps, Models And Analysis Of The Greater Portland Area, Oregon, Paul T. Beeson

Dissertations and Theses

Growing concern over earthquakes in the Pacific Northwest has prompted the mapping and location of near surface faults in the Portland area, Oregon. Visible evidence of faults is poor, requiring the use of geophysical methods to assist in mapping and defining structures in the basin. Gravity maps and models may help in addressing this problem.

Two free-air gravity models were produced. The first model constructed from existing data crosses the basin from Petes Mountain northeast to the Columbia River. The second model is from a gravity survey along Forsythe Road near Clackamas Heights.

The line crossing the basin confirms previous …

Geochemical Evolution Of Ferruginous Bauxite Deposits In Northwestern Oregon And Southwestern Washington, Joseph Michael Fassio

Dissertations and Theses

Ferruginous bauxite deposits developed from flows of the Columbia River Basalt Group in northwestern Oregon and southwestern Washington. Samples of the iron pisolite and the gibbsite nodular zones from the upper portion of the weathering profile of drill core from Columbia County, Oregon and Cowlitz County, Washington, were analyzed by instrumental neutron activation. The mineralogy was determined using Xray diffraction and Mossbauer spectroscopy.

The gibbsite nodular zone is above the clay-rich saprolite or relic basalt zone. The nodules contain relic vesicles and well preserved relic plagioclase microlites. Gibbsite occurs with poorly crystalline goethite and hematite in the gibbsite nodular zone. …

An Exploration Of Some Aspects Of Mystery, Terry Foster Thompson

Dissertations and Theses

This thesis project consists of twenty-four paintings, drawings and lithographs dealing with three sub-themes of the larger subject of mystery: the mystery of existence; the mystery of religion; the mystery of the unknown. These themes are explored through manipulations of light, color, compositional arrangement and painting and drawing techniques.

Determinants Of 2000 Meter Rowing Ergometer Performance, Jeff C. Young

Dissertations and Theses

Lean body weight and aerobic and anaerobic factors have long been recognized as important determinants of performance in the 2000 meter (M) race distance for rowing. Current research with noninvasive techniques has important implications for training and performance but is inconclusive. The purpose of this study was to investigate the relationship between a 2000 M rowing ergometer performance test (PT) and lean body weight (LBW), velocity at heart rate deflection (Vd), and anaerobic capacity (AC) in experienced rowers. Vd was used as an estimate of aerobic function. Thirteen trained male rowers (mean age 38.5 ± 8 years) were studied. Hydrostatic …

Differentially Diagnosing Stuttering In Young Children Using The Stuttering Severity Instrument, Brenda Pekkola Teich

Dissertations and Theses

Young children between the ages of two and six years often exhibit partword, whole word. and phrases repetitions as their language develops. This is also the age range when stuttering most frequently appears. Consequently. speech-language pathologists need diagnostic criteria and evaluation tools to distinguish between the incipient stutterer and the normally disfluent child.

Today a widely used evaluation tool is the Stuttering Severity Instrument (SSI) (Riley, 1972, 1980). The SSI is designed to provide a severity level based upon the parameters of frequency. duration. and physical concomitants. Riley (1972) first designed the SSI to not include monosyllabic word repetitions in …

Creating The Paradox In Form, Dennis A. Peterson

Dissertations and Theses

The intent of this thesis project was to create visual and psychological illusions and paradoxes by manipulating sculptural elements. This format embodied balances between man and nature and social comment.

The Effect Of Hot Dense Hydrogen And Argon In A Ballistic Compressor On The Structure And Composition Of Pure Iron, David Samuel Silver

Dissertations and Theses

An experimental study of pure iron foil exposed to a hot, dense hydrogen and argon gas mixture in a ballistic compressor yielded evidence of structural and compositional changes of the metal due to the presence of the hydrogen gas. Three iron foils have been compared, one of unexposed pure iron, another of pure iron exposed to a mixture of hydrogen and argon gas, and the third of pure iron exposed to argon alone. Exposure to these high temperature, high pressure gases took place in a ballistic compressor.

Line formations were found on the surface of the iron foil exposed to …

Dna Fingerprinting Analysis Of Captive Asian Elephants, Elephas Maximas, Laura Louise Bischof

Dissertations and Theses

This thesis examined the effectiveness of DNA fingerprinting analysis for paternity ascertainment and the establishment of relatedness of captive Asian elephants (Elephas maximas). Eighteen Asian elephants from three North American zoos were examined. Thirteen of these elephants were wild caught. Relationships between these elephants and the remaining elephants born in captivity were known.

Snake River : A Personal Search, Eva Havas Slinker

Dissertations and Theses

This thesis includes twenty landscape paintings, primarily oil on canvas, inspired by a trip to the Hell's Canyon Country of the Snake River.

The search for a personal idiom necessitated introspection, and the visual interpretation of the recalled experience required that formal issues of painting be synthesized to communicate the essential response to the landscape. The images progress from the depiction of deep space to compositions of the component parts of the landscape: trees, water, and rock.

Torso As Ceramic Vessel, Richard Garrett Masterson

Dissertations and Theses

The ceramic forms in this thesis project represent a study of the sculptural and figurative qualities of the ceramic process. This study includes a search for a personal form language, development of the slab construction technique, and development of a glazed surface appropriate to the work. The subject of the work is the human torso, with the vessel-like forms focusing on the core of the body as a metaphor for the core of the human spirit.

Performance Analysis Of A Distributed File System, Meenakshi Mukhopadhyay

Dissertations and Theses

An important design goal of a distributed file system, a component of many distributed systems, is to provide UNIX file access semantics, e.g., the result of any write system call is visible by all processes as soon as the call completes. In a distributed environment, these semantics are difficult to implement because processes on different machines do not share kernel cache and data structures. Strong data consistency guarantees may be provided only at the expense of performance.

This work investigates the time costs paid by AFS 3.0, which uses a callback mechanism to provide consistency guarantees, and those paid by …

Spatial Manipulation As A Covariant Of Mental Practice, Vincent James Wolff

Dissertations and Theses

This experiment examined the relationship between a subject's ability to manipulate spatial relationships and utilize mental practice in the mirror drawing ability of 45 naive volunteer college students, using a six-pointed star track. The spatial manipulation abilities of all subjects were assessed with the Minnesota Paper Form Board Test, after which the subjects were divided into three treatment groups (no practice, mental practice, and physical practice) of 15 subjects using a blocked random design based upon their MPFBT scores. All three groups were trained in the mirror drawing task and given three physical practice pre-trials for familiarization. The physical practice …

Terrain Disturbances By Winter Roads In The Lower And Central Mackenzie River Valley, N.W.T., Canada, Christoph Gnieser

Dissertations and Theses

Winter roads, built from compacted snow and I or ice, are common throughout the circumpolar North. They are considered effective and economical means of providing seasonal access into permafrost terrain while minimizing the potential for environmental damage.

The purpose of this study is an appraisal of long-term environmental impacts of winter roads by comparative assessment of terrain morphology, microclimate, permafrost, soils, and vegetation, on winter road right-of-ways and in adjacent undisturbed control areas.

Instrumentation For Multi-Electrode Voltammetry, I-Pin Ho

Dissertations and Theses

When metal pollutants exist in natural water, their toxicity is dramatically dependent on the chemical species. Numerous sophisticated techniques and instruments have been developed to detect metal pollutants at very low concentration levels. However, one important factor is often ignored, i.e., rarely is species determination required. Electrochemical (EC) methods have the particular advantage of being, in principle, a species-sensitive method rather than an element-sensitive method for the study of metal speciation in natural waters.

The goal of this research was to develop an instrument using the EC technique for speciation and general voltammetric studies. It was accomplished by designing a …

An Investigation Of The Relationship Between Training In Cooperative Learning And Teacher Job Satisfaction, Margaret Maloy Dutton

Dissertations and Theses

The research on cooperative learning has been conducted in terms of student achievement but little is known of how training in and use of cooperative learning affects teachers. The central purpose of this study was to examine the association between training in cooperative learning and teacher job satisfaction, with special attention to the subsets of collegiality and efficacy. A second purpose was to examine how levels of job satisfaction, efficacy, and collegiality vary as a function of the following training variables: (a) setting, (b) amount of use, (c) kind of training, (d) preparation for implementation, and (e) opportunity for skill …

Optimization And Thermodynamic Performance Measures Of A Class Of Finite Time Thermodynamic Cycles, Joseph D. Walters

Dissertations and Theses

Modifications to the quasistatic Carnot cycle are developed in order to formulate improved theoretical bounds on the thermal efficiency of certain refrigeration cycles that produce finite cooling power. The modified refrigeration cycle is based on the idealized endoreversible finite time cycle. Two of the four cycle branches are reversible adiabats, and the other two are the high and low temperature branches along which finite heat fluxes couple the refrigeration cycle with external heat reservoirs.

This finite time model has been used to obtain the following results: First, the performance of a finite time Carnot refrigeration cycle (FTCRC) is examined. In …

The Knowledge Systems Transfer Project: A Multiple Perspective Investigation Into The Integration Of A New Technology Within A Business Unit, Steven Craig Tarr

Dissertations and Theses

Many organizations have been attempting to build a conceptual framework for managing technology, with varying degrees of success. Most begin by consulting leading technology authorities, borrowing elements of their thinking, and adapting these elements to their organizational and personal situations. This dissertation extends this process by using the formal research methodology of multiple perspectives (technical, organizational, personal, and cross-cuing) to build a case-based model of the technology integration process. The research and the model construction benefits from a solid foundation established through a review of technology management and knowledge systems literature. The significant aspects of the research are tied to …

Resolution And Reconstitution Of The Photosystem I Reaction Center: Structure And Function Of The Terminal Electron Acceptor Fa/Fb Polypeptide, Tetemke Mehari

Dissertations and Theses

The Photosystem I core protein containing P700, A₀, A₁, and Fx has been isolated from Synechococcus sp. PCC 6301 and spinach Photosystem I complexes with 6.8 M urea followed by sucrose density ultracentrifugtion. The Photosystem I core protein has retained > 90% of Fx and 100% of P700 (determined by optical spectroscopy) but is totally devoid of iron-sulfur centers Fᴀ and Fв (determined by optical and ESR spectroscopy). SDS-PAGE indicates the retention of the 82-and 83-kDa reaction center polypeptides. The loss of Fᴀ and Fв is further reflected in the decline of acid labile sulfide from 11.8 ± 0.4 S²-/P700 in …

Chemistry Of Pentafluorothio (Sf5) Alkyl Derivatives, Rolf Walter Winter

Dissertations and Theses

Part I describes the preparation of a number of useful intermediates from the sultone F₅SCHCF₂OSO₂ (1). These intermediates include the following: the ketene F₅SC(SO₂)=C=O (21), the unique sultone F₄S=CCF₂OSO₂ (23), and various ionic intermediates of the form Y⁺ [F₅SC(SO₂F) COX]^-. These intermediates play an important role in providing new pathways for preparing fluorosulfonic acid precursors. Fluorosulfonic acids are excellent candidates to improve the efficiency of environmentally safe fuel cells. It was possible to obtain new derivatives of 1 by …

The Effect Of Two Viologens On The Solution Speciation Of Tetrakis([Rho]-Carboxyphenyl)Porphine, Suzanne Elizabeth Clarke

Dissertations and Theses

Porphyrins and viologens are often utilized in photocatalyzed electron transfer chemistry. Some of the problems faced by researchers in these applied studies include the lack of information correlating the porphyrin absorbance spectral changes with porphyrin dimerization, complexation, and the effect of noncomplexing cations. In addition, the efficiency of the system is greatly reduced by the formation of porphyrin:viologen association complexes. Knowledge of the values of these constants may allow selection of appropriate porphyrin:viologen concentration ratios which would enable optimization of these systems when used in such applications as artificial photosynthesis. This study reports the effect of selected salts and solvents …

Analysis And Numerical Simulation Of The Ground Water System At The Bonneville Navigation Lock Site, Oregon, Dirk Baron

Dissertations and Theses

As part of the new navigation lock for Bonneville Dam a new water source for the Bonneville Fish Hatchery must be supplied. The hatchery is located on the Oregon side of the Columbia River downstream of the dam. It requires large quantities of water free from chemical and biological contamination. In addition, the water has to be in a narrow temperature range. Currently the fish hatchery receives its water from a well field that is located on the alluvial terrace downstream of Bonneville Dam. The well field lies in the proposed approach channel for the new lock and has to …

The Relationship Between A Private Voluntary Organization And The Government Of A Developing Country In The Delivery Of Public Education: A Case Study In Rural Guatemala, Timothy John Peterson

Dissertations and Theses

As government agencies face a complexity of economic and political issues the availability and utilization of resources through private voluntary organizations (PVOs) have become increasingly important. A review of the literature covering the role of PVOs in developing countries indicates the significant contribution these agencies can have in the development process. There are only a handful of situations where small organizations are working directly with a government agency in the provision of a public service. Theoretically, PVOs are adaptable to a variety of settings, are effective conduits for delivering aid to the grassroots level, and are able to initiate long …

A Theoretical And Experimental Study Of The Three-Ring Electrostatic Electron Lens, Thomas Anthony Sommer

Dissertations and Theses

A theoretical and experimental study of the three-ring electrostatic lens is presented. The lens consists of three isolated ring-shaped conductors, equally spaced along a common axis of symmetry. When appropriate potentials are applied to the conductors an electric field is produced near the axis which is capable of focusing a collimated beam of electrons. In the theoretical study the charge density method is used to find a closed-form solution for the field. This method approximates the field by replacing each ring with an infinitely thin hoop of uniform charge. The radial and axial equations of motion are then solved numerically, …

Elementary Teachers' Perceptions Of Their Instructional Styles In The Teaching Of Conflict Resolution, Marcia Gregor Garrick

Dissertations and Theses

In order to assess current practices in the teaching of conflict resolution, this study examined (through survey methods) the perceptions of teachers in three Oregon school districts of similar size regarding the techniques they use to teach conflict resolution skills to their students, teachers' perceptions of the frequency of the use of those techniques, and teachers' perceptions of the effectiveness of those techniques. This study also compared the responses of teachers in school districts which provided teachers with staff development for the teaching of conflict resolution with the responses of those teachers from districts without that staff development. In addition, …