Digital Commons Network^™

When Older Mothers Work : Adult Children's Perceptions Of Maternal Employment Effects Christine B. Nelson, Christine B. Nelson

Dissertations and Theses

The effects of maternal employment on the young child have been examined for over 50 years. This research focuses on perceived maternal employment effects at a later point in the family life cycle: when mother is older and children are grown. Thirty-two poverty level women aged 56-83 (M=66.4 years) and their adult sons (n=l 6) and daughters (n= 16) were independently interviewed. All of the older women were paid workers or "stipended volunteers" who were employed part time (20 hours a week) in child care, clerical, or other service jobs. They had a variety of work histories; all were widowed …

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 …

The Unified Speech Period Of A Bilingual Child, Gary Frank Wood

Dissertations and Theses

Previous studies of bilingual infants learning their languages simultaneously have suggested that such children go through what is known as a unified speech period in which they make no differentation between the languages in question and in which they frequently use mixed utterances (Arnberg, 1987; Grosjen, 1982; Leopold, 1939; & Skutnabb-Kangas, 1981). To test the validity of the claim that there is such a period, an English-Japanese bilingual child from one year and six months of age (1;6) through two years and six months of age (2;6) was observed and his speech recorded.

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, …

A Study Of Prospective Entrepreneurs' Perceptions Of Knowledge Required For Success : And Its Implications For Curriculum Development And Revision, Vickie Lynn Schray

Dissertations and Theses

The purpose of this study was to provide information to secondary, post-secondary and vocational teachers on what instructional areas should be taught to prospective entrepreneurs involved in pre-venture training. In addition it was hoped that information gained from the study would add to the existing body of knowledge on entrepreneurship education and validate entrepreneurship education practices in Oregon.

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.

The Relationship Between Reading Comprehension And Self-Esteem In Low Level Reading Adults, Judy Rosen Heumann

Dissertations and Theses

The purpose of this study was to determine if a correlation existed between reading comprehension and self-esteem in adults with no reading ability to adults reading at the fifth grade level. Reading comprehension was measured by the comprehension section of the Brigance Diagnostic Comprehensive Inventory of Basic Skills in half year increments after primer level, from lower first to upper third grade. Full year increments were indicated from fourth through ninth grade. Self-esteem was self-reported through use of the Counseling form of the Tennessee Self Concept Scale. Data were collected during Fall term, 1989 (September through December) at Portland Community …

A Survey Of Diplomatic And Commercial Relations Between The United States And Oman In Zanzibar, 1828-1856, Mohammed Al-Mukadam

Dissertations and Theses

Informal relations between American merchant traders and the Sultanate of Oman in the port of Zanzibar began with the landing of the first American merchants about 1828. At the same approximate time, Sultan Said bin Sultan moved his official residence from Muscat, Oman, to Zanzibar, underlining the importance of Zanzibar to the administration of his territories on the East African coast. Relations were formalized by the Treaty of 1833 between the United States and Oman, and the U.S. established a consular mission in Zanzibar in 1837 and in Muscat in 1838.

The growth of the Omani Empire under Sultan Said …

The Use Of The California Consonant Test And The Northwestern University Auditory Test No. 6 In Hearing Aid Evaluations For Individuals With Precipitous Losses Above 1 Khz, Bradley James Allard

Dissertations and Theses

These two joint-studies used recorded versions of the Northwestern University Auditory Test Number 6 (NU-6) and the California Consonant Test (CCT) in the hearing aid evaluations (HAEs) of 12 male and one female subjects, aged 41 to 87 years. They exhibited precipitous high frequency losses beyond 1 kHz in at least one ear. All subjects were evaluated without amplification and while monaurally aided with two conventional high pass hearing aids. Ten of the subjects were evaluated in multi-talker noise and 11 were tested in quiet. Since the CCT was more heavily weighted than the NU-6 with target phonemes sensitive to …

Methionine Metabolism In Fasciola Hepatica, Carol Theresa Ayer

Dissertations and Theses

5'-Deoxy-5'-methylthioadenosine (MTA) is derived from s-adenosylmethionine (AdoMet) during the synthesis of the polyamines spermidine and spermine. Methionine can be regenerated from MTA by one of two mechanisms. In mammalian cells and some microorganisms, MTA is degraded to adenine and 5-methylthioribose-1-phosphate (MTR-1-P) via MTA phosphorylase. In certain other microbes, however, MTA is catabolized in two steps; first to adenine and 5-methylthioribose (MTR) via MTA nucleosidase followed by conversion of MTR to MTR-1-P via MTR kinase.

This study was to demonstrate the presence of MTA nucleosidase or MTA phosphorylase in both redia containing cercariae and adult Fasciola hepatica Linnaeus, 1758. If MTA …

Written Narratives Of Language Disordered And Normal Adolescents On Two Tasks, Antigone Howick Brown

Dissertations and Theses

The purpose of this study was to describe written narratives of language disordered adolescents by comparing their written narratives via story grammar analysis with those of normal adolescents. The written narratives were obtained by administering two tasks as required assignments within the English or communications classes of the two groups. Task A was to write about a personal experience and Task B was about an imaginary experience. This study used Merritt and Liles' adaptations (1987) of Stein and Glenn's procedures (1979) for story grammar analysis to describe the content of the narratives.

A Comparison Of An Acoustic Stethoscope And An Amplified Stethoscope In White Noise And Cafeteria Noise During Cardiac Auscultation, Lynda Lynell Gigstad

Dissertations and Theses

A basic relationship between stethoscopic auscultation and background noise interference was reviewed and examined in this study. The principle experimental design of the study questioned whether hospital background noise levels are capable of masking the threshold of detection for auscultated heart sounds. Several cited studies monitoring background noise levels in various hospital locations have reported averages exceeding the U.S. Environmental Protection Agency (EPA) (1974) and World Health Organization (WHO) (1980) recommendations of "quiet", namely 35 to 40 dBA (Falk & Woods, 1973; Hilton, 1985, 1987; Shapiro & Berland, 1972; Turner, et al., 1975; Woods & Falk, 1974) by as much …

The Use Of Phonological Process Assessment For Differentiating Developmental Apraxia Of Speech From Functional Articulation Disorders, Kathryn Dearmond

Dissertations and Theses

Focus has turned from emphasis on phonetic sound errors to phonologic rule systems in the study of articulation disorders. The current theory proposes that the phonological disorders which children experience are controlled by higher levels in the brain than those that control the motor functioning of the brain. The purpose of the present study was to compare the use of phonological processes by a group of school-age children with moderate to severe multiple articulation disorders (MAD) with developmental apraxia of speech (DAS) to the phonological processes used by those without developmental apraxia of speech. For the purposes of this study, …

Threaded Octree Structures For Fast Neighbor Voxel Processing In A Parallel Ray Tracer, B.R. Naveen Chandra

Dissertations and Theses

In the field of Computer Graphics, Ray Tracing has so far been the the best algorithm for rendering of realistic three dimensional images created by mathematical models. Ray Tracing is also known for its very large computation times, where the computation depends on the picture resolution, the number of objects and the complexity of the scene.

On A Women's Language, Tamara Brown

Dissertations and Theses

Assessing the feminist belief that women have a perspective dramatically differing from the patriarchal perspective, and that this viewpoint is, or could be, couched in a language differing from the norm, this researcher addressed the following three questions: (1) is there a definition of a women's language? (2) does a women's language exist? and (3) if a women's language does exist, in what form does it exist? These questions engendered feminist rhetorical criticism on the work of two radical feminists well known for their interest in, and attention to, the issue of a women's language.

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 …

The Relationship Between School Integration And Student Attitude Toward Residential Racial Integration, David Allen Johnson

Dissertations and Theses

This study examined factors related to the teaching effectiveness of adjunct faculty in higher education. Specifically, it explored the relationship between personality, as defined by the Five-Factor Model, occupation, and student ratings of teaching effectiveness. Results indicate that personality is correlated to an instructor's classroom behavior and education goals, which in turn are related to teaching effectiveness. In addition, instructors with occupations in social services and education had significantly higher mean teaching effectiveness scores than those from other occupations. Finally, there was an inverse relationship between age and teaching effectiveness in this study, and a positive relationship between teaching experience …

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 …

Policy Into Practice: A Study Of Legislative Impact On Administrative Practice In Washington Schools, James Carter Leffler

Dissertations and Theses

This research project was designed to obtain data on factors that influence whether state level Legislative policies affect the changes in practice at which they are directed. Specifically, the study examined a teacher evaluation short form option created in 1985, the original intent of the policy, and the resultant changes in practice. It examined the situations in which the option was utilized, and whether current practice reflected research on effective practices. Phone interviews were conducted to identify legislative intent and to develop study questions and forced choice items. Systematic sampling techniques were used to distribute surveys to principals in every …

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 …

The Overage Student: Candidate For School Failure, Virginia Homeier Anderson

Dissertations and Theses

This study, conducted in a suburban school district, examined academic achievement and demographic considerations for a group of students overage for their respective grades. Records of 127 subjects were examined and data collected with respect to student performance on academic indicators of at risk behavior. Indicators were scores on criterion referenced tests in reading and mathematics as well as school absence figures for all subjects. These data were subjected to ANOVA and Chi Square Tests of significance to ascertain if there were differences between the students who were overage due to in-grade retention and those overage for other reasons. Research …

Job Satisfaction Of Classified Employees In A Public Suburban School District, Jeradean Emma Rehm Masciocchi

Dissertations and Theses

This study examined the sources of job satisfaction and dissatisfaction for classified employees in a large public suburban school district. The population included randomly-selected bus drivers, custodians, school and non-school secretarial employees, instructional assistants, maintenance workers, food service personnel and technical employees. Three research questions were posed: (a) What are the primary sources of job satisfaction and dissatisfaction for classified employees? (b) Is there a significant difference in job satisfaction among the specific categories of classified employees? (c) Are demographic/personal variables of classified employees related to overall job satisfaction? The study incorporated both qualitative and quantitative methodology. Focus groups were …

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 …

The Determinants Of Opec Market Share Stability, Fahed M. Al-Ajmi

Dissertations and Theses

The objectives of this dissertation are to explain the production behavior of OPEC's member countries from 1971 to 1987 and to determine whether there was any structural shift in OPEC's production behavior after the organization attempted to assign a quota to each member. This study focused on political and social as well as economic variables, in order to overcome the misspecification of previous models. In order to achieve the above objectives, the study used the following four models, with modifications: the cartel, competitive, target revenue, and property rights models. The double log multiple linear regression technique was used to operationalize …

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 …

Speechreading Ability In Elementary School-Age Children With And Without Functional Articulation Disorders, Barbara L. Habermann

Dissertations and Theses

The purpose of this study was to compare the speechreading abilities of elementary school-age children with mild to severe articulation disorders with those of children with normal articulation. Speechreading ability, as determined by a speechreading test, indicates how well a person recognizes the visual cues of speech. Speech sounds that have similar visual characteristics have been defined as visemes by Jackson in 1988 and can be categorized into distinct groups based on their place of articulation. A relationship between recognition of these visemes and correct articulation was first proposed by Woodward and Barber in 1960. Dodd, in 1983, noted that …

Phrasal Verbs In Academic Lectures, Robert D. Pierce

Dissertations and Theses

Phrasal verbs are a pervasive and distinctly Germanic part of the spoken English language that has been alive for centuries. They have preceded American history, and yet considered to be "the most active and creative pattern and word formation in the American language" (Meyer, 1975). Distinctly colloquial, idiomatic and varying in shades of literalness and figurativity, phrasal verbs are largely dominant in casual usage, such as conversation, while the Latinate verbs of English are dominant in formal usage, such as in making reports (McArthur 1989). While foreign educators and their students, such as from Chinese countries, are found to emphasize …