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A Phylokaryotypic Evaluation Of The Genus Tursiops (Family Delphinidae), Melissa Kay Estes

Dissertations and Theses

In an attempt to correlate genetic data with possible species delineation, this study investigates the presence of chromosomal variants between the North Atlantic bottle nose dolphin, Tursiops truncatus, and the North Pacific bottle nose dolphin, T. gilli. Blood samples were obtained from oceanaria in the United States. Location of capture was correlated with karyotype to compare chromosome morphology with geographic range.

Use Of Synthetic Speech In Tests Of Speech Discrimination, Jane S. Gordon

Dissertations and Theses

The purpose of this study was to develop two tape-recorded synthetic speech discrimination test tapes and assess their intelligibility in order to determine whether or not synthetic speech was intelligible and if it would prove useful in speech discrimination testing. Four scramblings of the second MU-6 monosyllable word list were generated by the ECHO l C speech synthesizer using two methods of generating synthetic speech called TEXTALKER and SPEAKEASY. These stimuli were presented in one ear to forty normal-hearing adult subjects, 36 females and 4 males, at 60 dB HL under headphone&. Each subject listened to two different scramblings of …

The Role Of Copper In The Apparent Aluminum Toxicity Of Aquatic Systems, Kirk Thomas O'Reilly

Dissertations and Theses

The effect of variations in aluminum and copper concentrations on the growth rate and enzyme activity of the green alga Scenedesmus quadricauda was investigated. The goal was to determine which chemical species control the biological parameters. The computer program MINEQL (Westal et al 1976) was used to estimate chemical speciation. In the prevalence of both metals, algal growth rate and alkaline phosphatase activity could be correlated to cupric ion activity. The activity of isolated bacterial alkaline phosphatase was found to be a function of both total copper concentration and cupric ion activity. A model was developed to predicted the effects …

Partial Purification And Characterization Of F₄₂₀-Dependent Nadp Reductase From Methanobrevibacter Smithii Strain De1, Scott D. Sheridan

Dissertations and Theses

The F₄₂₀-dependent NADP reductase of Methanobrevibacter smithii has been partially purified employing a combination of affinity chromatography with Blue Sepharose (Cl-6B) and molecular sieve chromatography with Sephacryl S-200, The enzyme, which requires reduced F₄₂₀ as an electron donor, has been purified over 145 fold with a recovery of 6%. A molecular weight of 120,00 for the native enzyme was determined by Sephacryl S-200 chromatography. A subunit molecular weight of 28,200 was determined by SDS-PAGE, indicating that the native enzyme is a tetramer. The optimal temperature for enzymatic activity was found to be 45°C, with a pH optimum …

Scotopic And Photopic Thresholds : A Dependent Variable For The Mccollough Effect, Marilyn Murphy

Dissertations and Theses

Previous attempts to adequately evaluate orientation-specific colored aftereffects (Mccollough Effects) have thus far been unsuccessful in yielding quantitative measures of relative strengths of the effects. Similarly, little success has been shown in previous attempts to establish what level of illumination is necessary in order to evoke the aftereffects. The present study sought to determine (a) whether threshold measurements could serve as adequate, quantitative dependent variables of the Mccollough Effects, (b) whether photopic illumination was necessary in order to evoke the aftereffect. It was predicted that the greater the number of inspection trials, the dimmer the illumination level could be in …

A Study Using The 10-Key Pad On A Microcomputer And Electronic Calculator, Nancy K. Pechman

Dissertations and Theses

This study was conducted to determine whether there was a significant difference between the development of speed and accuracy on a 10-key pad on a microcomputer or on an electronic calculator. A total of 204 participants were involved in the quasi-experiment.

Sharing As A Function Of The Number Of Play Materials, Nancy Carol Milstead

Dissertations and Theses

This study examined whether the number of available play materials (toys) affected the occurrence of sharing behavior in preschool children. Eighteen four- and five-year-old children were assigned by age and gender to six same-sexed groups of three children each and were observed during three, 10-minute observation sessions. All groups were observed playing with one toy, two toys, and three toys. The children's play activities with the toy(s) were videotaped, and a behavioral coding system was developed to record those behaviors. The effect of toy condition on the sharing categories of Asked-for-Share, Partial Share, Overall Share (a category combining the highly …

Transient Flow Inverse Study Calculation Of Unsaturated Permeability Of Wood, Farid Piroozmandi

Dissertations and Theses

One of the major processes in lumber industry is wood drying. This process consumes large amounts of energy and capital, and due to the length of time it takes, it acts as a governing factor in lumber production levels. Development of improvements in processes and equipment used in wood drying can be expedited through computer simulation of various drying procedures. These numerical simulations depend on the accuracy of numerical models representing wood transport properties, including functional dependency of liquid permeability through wood with respect to local saturation level. Data available in the literature mainly represent wood permeability properties at fully …

The Use Of Humor In The Social Construction Of Role Relationships In A Behavioral Treatment Setting, Daniel D. Martin

Dissertations and Theses

This study examined the use of humor between workers and managerial personnel of two different treatment teams within a residential treatment center for emotionally troubled youth. Three primary questions guided the research: (1) What indigenous types of occupational humor will be found within the treatment teams?, (2) How will the use of humor vary between front and back regions of treatment work?, and (3) How does occupational status affect the way in which team members target on another to be the "butt" of jokes and other humorous remarks?

Structure And Evolution Of The Horse Heaven Hills In South-Central Washington, Michael Curtis Hagood

Dissertations and Theses

The Horse Heaven Hills uplift in south-central Washington consists of distinct northwest and northeast trends which merge in the lower Yakima Valley. The northwest trend is adjacent to and parallels the Rattlesnake-Wallula alignment (RAW; a part of the Olympic-Wallowa lineament). The northwest trend and northeast trend consist of aligned or en echelon anticlines and monoclines whose axes are generally oriented in the direction of the trend. At the intersection, folds in the northeast trend plunge onto and are terminated by folds of the northwest trend.

Load Flow And Contingency Analysis In Power Systems, Kianfar Sorooshian

Dissertations and Theses

A load flow and contingency analysis program for secure design, planning and operation of power systems. Depending on the application either Newton-Raphson or Fast-Decoupled method is employed to solve the load flow. Fault analysis is done by Z bus method. Contingency analysis may be done following the load flow solution by Fast-Decoupled method. The program is also interfaced with a graphic system which displays a single line diagram of the system on the graphic screen along with relevant data and informs the operator of any change by flashing the faulted bus or the line outage.

An Analysis Of The Affects Of Crisis On The Decision Making Practice Of A Dialysis Program: A Case Study, James Christopher Farley

Dissertations and Theses

In 1982 the Health Care Finance Administration mandated changes in the mechanism and financing of the End Stage Renal Disease (ESRD) Program by the provisions of the Omnibus Budget Reconciliation Act. These changes in finances and procedures became effective August 1, 1983 and have created a state of crisis for ESRD facilities program wide. This study analyzes a large non-profit dialysis program and how its decision making practices were affected 2 by the change in Medicare laws. Application of decision theory in health care provides a basis for this study on the affects of crisis on decision making.

This study …

Intercultural Communication Problems Of Nigerian Students In The Portland Metropolitan Area: A Comparative Study Of A Review Of Literature And Personal Interviews, Sam Tugba

Dissertations and Theses

This study is an attempt to discover the intercultural communication problems and the methods of coping used by the Nigerian students in the Portland metropolitan extent to which these discovered problems and tried solutions compare with those of other international students that are commonly reported in the literature.

Jewelry From The Environment, Douglas Lawrence Kollmeyer

Dissertations and Theses

This thesis deals with the development of a body of my own creative work and the teaching of jewelry-working in the secondary schools. Emphasis in both instances was given to the use of the natural environment as a stimulus for design ideas. The philosophy of nature as art forms has been the focus of my creative endeavors for several years. This lead to the design and completion of jewelry, flatware, and holloware in this study. Knowledge gained in my work experiences formed the basis and background of the presentation of these skills to secondary students.

Effects Of Dehydration On Hemoglobin Oxygen Affinity And Blood Cell Volume In Two Anurans, Andrew Christopher Zygmunt

Dissertations and Theses

Two aspects of possible adaptation in cardiovascular performance caused by increased plasma electrolytes were examined. Cells in anisotonic plasma may either act as osmometers or volume regulate. Blood flow rate is dependent upon cell viscosity, which in turn is a consequence of cell volume and membrane deform-ability. Cell volume changes which increase membrane deform-ability will thus potentially extend the limits of dehydration tolerance. It was found in R. catesbeiana and B. marinus that red blood cell is maintain constant volume during dehydration. Cells in vitro initially lose water, but then sodium, potassium and water move into the cell. Cell viscosity …

Effects Of Urbanization On The Hydrologic Regime Of Johnson Creek, Portland, Oregon, William Vandewater Clement

Dissertations and Theses

The Johnson Creek watershed, Portland, Oregon, has undergone urbanization at an increasing rate. Excessive flooding has occurred in the lower portions of the watershed, resulting in an estimated 1.5 million dollars worth of flood losses annually. In attempts to mitigate the flooding damages millions of dollars have been spent to channelize the creek, and over 200 thousand dollars has been spent during the last 20 years on preliminary feasibility studies alone.

The author saw a need to verify that there has been a change in the rainfall-runoff relationships in the upper Johnson Creek basin since 1941 and to quantify this …

The Effect Of Problem Complexity On The Efficiency Of Intuitive And Analytic Processes, Teresa Farley Kao

Dissertations and Theses

Some investigators have suggested that when material becomes more complex, an individual is forced to use an intuitive process, while others suggest that increasing complexity forces analysis. This study was an attempt to resolve this question by manipulating rate of presentation and instructions. No effect was found due to these manipulations or due to complexity. The reason is not clear, but may be due to a combination of factors which inclined the experiment in the direction of the intuitive process.

Effect Of Menstrual Cycle On Hedonic Response To Gustatory Stimuli, Laurie Ann O'Toole

Dissertations and Theses

The present experiment was conducted to determine the relationship between the human menstrual cycle and gustatory hedonic response. Hedonic response was defined as the perceived pleasantness or unpleasantness of a taste stimulus. Gender differences in taste hedonic have been observed; these may be due to differences in endocrine systems. Animal taste preferences are altered when reproductive hormonal status is experimentally manipulated. Previous researchers report that human females' hedonic responses to sucrose vary systematically with phase of menstrual cycle.

Peri-Urban Agriculture In Western Washington: An Identification Of Factors Of Potential Influence To The Development Of Metropolitan Food Policy, William H. Gray

Dissertations and Theses

Historically, agricultural policy has been developed at the national level, while land use decisions have been made at the municipal or county level. In primarily rural areas, the policy objectives of these domains are largely consistent: agricultural development. In urban areas, however, the food production objectives of national policy and the planning objectives of local government may be incongruent. This research uses the European construct of "peri-urban agriculture" as a framework in which to address the issues confronting both farm producers and metropolitan areas.

The principal hypothesis to be tested in this research is that farmer characteristics differ between peri-urban …

A Comparison Of A Group Approach And A Personalized Approach In Teaching Behavior Management Techniques To Parents, Vicki Martin

Dissertations and Theses

Parent intervention programs that assist parents in increasing their skills in behavior management techniques have experienced considerable success over the last 20 years. Parent training not only aids the parent in changing the child's behavior but may be beneficial in preventing future problems.

When a program of this type is utilized with low income populations, cost effectiveness becomes an important issue. The purpose of the present study was to compare the effectiveness of a parent intervention program when utilizing a group format versus a personalized, one-to-one approach to training.

The Eyberg Child Behavior Inventory (ECBI) was administered pre and posttreatment …

A History Of The Street Railway Systems Of Vancouver, Washington, 1889-1926, David Warren Freece

Dissertations and Theses

The decade of the 1880s was a time of unprecedented development in the Pacific Northwest. Railroads were being constructed, immigration was high, lumber in demand and statehood for Washington appeared imminent. Vancouver, Washington, benefited from this prosperity. In 1888, a Portland firm built a steam powered railway from East Portland, through its real estate development, Woodlawn, to the Vancouver ferry. The success of this enterprise in aiding the sale of real estate was observed by several Vancouver men who formed the Columbia Land and Improvement Company to promote the sale of their property. The company constructed a horse drawn street …

Career Lines In The Area Of Mental Retardation, Charlotte Ballard

Dissertations and Theses

In the past few years there has been a large growth in the number of facilities and services provided to the mentally retarded in the community, as contrasted to the institutional setting.

This thesis reviews some of the factors involved in the transition to community care for the mentally retarded as a background for an examination of the characteristics and perceptions of the persons who provide community care.

The Effect On Culture-Bound Evaluation By The Intercultural Communication Workshop (Icw) At Portland State University, Marion Franc Sørensen

Dissertations and Theses

The purpose of this study is to investigate the effect on culture-bound evaluation by the Intercultural Communication Workshop (ICW) at Portland State University. An increase in positive evaluation of an intercultural dyad was taken to indicate a decrease in culture-bound evaluation. Methodology consisted of an adaptation of Dawes' "Direct Estimation Techniques" which was utilized in creating the testing instrument. The results are inconclusive but suggest that the ICW training may be more effective in this dimension for the American students than for International students.

Alternating Current Studies And Kinetic Analysis Of Valinomycin Mediated Charge-Transport Through Lipid Bilayer Membranes, Kenneth Lee Cox

Dissertations and Theses

In this study we have investigated the frequency dependence of bilayer lipid membranes for a series of glycerylmonoolein/n-decane bilayers in various aqueous ionic solutions containing the ionophore valinomycin. Reliable values of membrane capacitance and conductance were obtained over the frequency range 0.2 - 200 KHz using an automatic balancing bridge under the control of a microprocessor unit. The admittance data was then normalized and curve-fitted to produce relaxation times and amplitudes from which the kinetic rate parameters, as deduced from a single slab dielectric membrane model, were calculated. These ac experimental rate constants were then compared with those obtained from …

Integration In West Africa: An Empirical Examination Of Ecowas, Stephen C. Adkisson

Dissertations and Theses

The Economic Community of West African States (ECOWAS) was established by treaty in 1975 to promote the economic and political well-being of its 16 regional members. As a coordinated effort of geographically associated states ECOWAS joins an expanding group of regional integration schemes created by developing countries.

As an international organization with some claim to supranational authority the success of the ECOWAS scheme is of practical and theoretical importance. Success in this sense implies an increasing level of interaction among the ECOWAS members and the development of a regional economic and political position toward non-member states. This coordination of member …

Determination Of Systemic Blood Pressure Via Autospectral Analysis Of Oscillometric Data, Eugene Elie Warner

Dissertations and Theses

The currently accepted methods for measuring systemic blood pressure are either highly accurate but invasive in nature or clinically convenient but prone to observer-related errors. A new oscillometric method uses sensitive signal conditioning and sensing equipment with a non-invasive arm cuff to record arterial pulsations. The goal of this study is to establish more reliable criteria for the identification of systolic and diastolic pressures from oscillometric data.

Measurement Of Low Vapor Pressures: A Kinetic Approach, Samuel Bernard Bliden

Dissertations and Theses

A kinetic model was applied to vapor pressure data obtained by a variable flow method. The vapor pressures of benzoic acid, naphthalene, benzophenone, and phenylhydrazine were measured at temperatures of 293K to 307K. The data are summarized in the data table on the following page. These data were obtained by passing air over a sample of the substance in a tube. The air stream was combusted, and a flame ionization detector was used to measure the mass of CO₂ so obtained. Several different flow rates were used at each temperature with each substance.

Effects Of Intraperitoneal And Intracerebral Injections Of Triiodothyronine On Temperature Selection In Fish, Dennis A. Grahn

Dissertations and Theses

Goldfish (Carassius auratus) of 15-28g were maintained at 23 C and subsequently were intraperitoneally injected with saline (controls) and varying doses of Triiodothyronine (T₃). Following the injection, the fish were placed in a thermal gradient and temperature selection and activity monitored for 30 min. There was no- significant difference between the responses of the experimental fish to the 2 different doses of T₃. However, there was a significant difference in response between the experimental and control groups (P < 0.001). The decreased temperature selection occurred early in the test runs, while the increased activity began later. Larger goldfish (175-205g) received 0.5 μl intracerebral injections of 1.5-3.0 ng T₃ in the anterior brainstem via an indwelling cannula injection system. These fish responded to the injections by …

Early Childhood Education And Compensatory Education In The Portland, Oregon, Public Schools, 1965-1984, Dolores Jean Robinett Pappas

Dissertations and Theses

This investigation had the dual purpose of exploring, in historical perspectives, the academic discipline known as Early Childhood Education and the use of Early Childhood Education as a vehicle for compensatory education in the Portland Public Schools from 1965-1984.

Geology, Alteration And Mineralization Of A Silicic Volcanic Center, Glass Buttes, Oregon, Michael James Johnson

Dissertations and Theses

Glass Buttes, a Pliocene silicic volcanic complex within the High Lava Plains province of Oregon, was erupted approximately 5.0 to 5.8 million years ago. Geologic mapping revealed that the eastern portion of the complex is underlain by rhyolitic glass domes, flows and rare pyroclastic flows. Basalt flows are interlayered with and onlap the silicic glass. Younger basalt flows, erupted from local vents, overlie silicic glass and onlapping basalts.

The eastern end of Glass Buttes is hydrothermally altered at the surface; a weak geothermal anomaly coincides with the altered areas. Alteration, localized by northwest trending normal faults, occurs primarily as opalite …