Digital Commons Network^™

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 …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

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.

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 …

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.

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 …

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 …

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 …

A Study Of Washington Secondary Principals' Perceptions Of Effective Dropout Prevention Policies And Programs, Susan Lindsley Greenwood

Dissertations and Theses

This study examined what Washington high school principals perceive to be the most effective dropout prevention policies and programs. The population included all public high schools in the State of Washington. Five questions were posed: 1. (a) What preventative measures, intervention programs or student services designed to enhance environmental and personal factors are perceived to have reduced dropout rates? (b) Does the availability of those services and programs account for a significant difference in the actual dropout rates? 2. (a) What personal/psychological factors characterize potential dropouts? (b) Do these identifying characteristics account for a significant variance in the actual dropout …