Digital Commons Network^™

The Design Of High-Frequency Continuous-Time Integrated Analog Signal Processing Circuits, Pan Wu

Dissertations and Theses

High-performance, high-frequency operational transconductance amplifiers (OTAs) are very important elements in the design of high-frequency continuous-time integrated analog signal processing circuits, because resistors, inductors, integrators, mutators, buffers, multipliers, and filters can be built by OTAs and capacitors. The critical considerations for OTA design are linearity, tuning, frequency response, output impedance, power supply rejection (PSR) and common-mode rejection (CMR). For linearity considerations, two different methods are proposed. One uses cross-coupled pairs (CMOS or NMOS), producing OTAs with very high linearity but either the input range is relatively small or the CMR to asymmetrical inputs is poor. Another employs multiple differential pairs …

Thermoregulation In Mice Under The Influence Of Ethanol, Candace Sharon O'Connor

Dissertations and Theses

Thermoregulation after acute ethanol, during chronic exposure and during withdrawal from ethanol dependency was studied using genetically heterogeneous (HS) mice, and lines of mice selected in replicate for smaller (HOT1, HOT2) or greater (COLD1, COLD2) decline in rectal temperature (Tre ) after intraperitoneal ethanol. First, HS mice were injected with 20% ethanol in 0.9% NaCI, or NaCI alone during sessions of behavioral thermoregulation in individual temperature gradients (9-38°C). Internal temperature (Tj ) was monitored with implanted telemetry devices. An imaging system recorded selected temperature (Tsel ) within the gradient every 5 sec. Acute 2.25 and 2.60 g ethanol/kg produced significantly …

Nucleation And Heat Transfer In Liquid Nitrogen, Eric Roth

Dissertations and Theses

With the advent of the new" high Tc superconductors as well as the increasing use of cryo-cooled conventional electronics, 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 these investigations the transient heating characteristics of liquid nitrogen to states of nucleate and film boiling under different liquid flow conditions are examined. Using a metal hot wire/plate technique, it is verified that there is a premature transition to film boiling in the transient case at power levels as much as …

Rapists And Their Parental Relationships, Yaeko Steidel

Dissertations and Theses

This dissertation attempts to find out what associations exist between dysfunctional parental relationships in the childhood of rapists and the rapists' violent acts. It also briefly examines the sociocultural effects which nurture such relationships.

Rape, a crime very prevalent in our society today, is now perceived as an acute expression of men's contempt for and anger against women. The former interpretation of rape as primarily a sexually motivated crime is no longer popular. This dissertation attempts to trace the origin of the rapist's psyche from his dysfunctional parental relationships.

Rare data on rapist's family relations from a recent FBI survey …

Lexicography In West Africa: Preparing A Bilingual Kisi-English Dictionary, George Tucker Childs

Applied Linguistics Faculty Publications and Presentations

This paper presents some of the issues involved in preparing a bilingual dictionary for Kisi, an underdocumented language spoken in West Africa. Because the language possesses little in the way of literacy materials, fundamental issues as to orthography, word division, etc., had to be considered. In addition, no grammar of the language (or its closest congeners) was available and thus basic grammatical analysis had to be performed simultaneously. I briefly consider some of these problems, discussing the use of the lexical data base programs known as LEXWARE. I then focus on the specific problems raised by the expressive word class …

Five Downtown Strategies: Policy Discourse And Downtown Planning Since 1945, Carl Abbott

Urban Studies and Planning Faculty Publications and Presentations

Downtown planning since World War II has been based on constantly changing assumptions about the nature of central business districts. From 1945 to 1955, downtown was seen as the city's unitary center, and the focus of planning activity was the improvement of downtown access and circulation. Between 1955 and 1965, downtown became a declining activity center and failing real estate market; planners and business groups fought decline and competition from the suburbs through programs like urban renewal. In the decade after 1965, a reaction against urban renewal led to a new conception of downtown as a set of distinct functional …

Object Parallel Spatio-Temporal Analysis And Modeling System, David Bruce Rex

Dissertations and Theses

The dissertation will outline an object-oriented model from which a next-generation GIS can be derived. The requirements for a spatial information analysis and modeling system can be broken into three primary functional classes: data management (data classification and access), analysis (modeling, optimization, and simulation) and visualization (display of data). These three functional classes can be considered as the primary colors of the spectrum from which the different shades of spatial analysis are composed. Object classes will be developed which will be designed to manipulate the three primary functions as required by the user and the data.

Towards Comprehensive Migration Modeling: A Meta-Analytic Approach, Wamukota Francis Wambalaba

Dissertations and Theses

In view of theoretical proliferations in migration studies, there is a need for a more comprehensive approach to migration modeling. A central problem identified in this study was the multitude of potential variables for migration research and the lack of established procedures for selecting among them. Several studies on migration have attempted to answer cornmon migration questions, but with differing variables and therefore divergent conclusions. There is thus a strong potential for misinterpretation by researchers and policy makers. Partial theories of migration have been developed rather than a unified one. This study offers an objective process through which variables may …

Solution-State Proton Nuclear Magnetic Resonance (Nmr) Spectroscopic Studies Of The Active Site Of Myoglobins In Various Ligated States: Models For Macromolecule-Substrate Binding And Advancement Of Paramagnetic Nmr Techniques, Sidney Yee

Dissertations and Theses

This work focuses on pigmy sperm whale and horse myoglobins (Mbs), which are distinguished by a single heme pocket residue variant in the CD3 position, when the heme iron is in the +3 oxidation state (i.e. the met form). The strategy employed is as follows: (i) assign heme peripheral protons; (ii) assign the amino acid residues from the heme cavity; (iii) assess the dynamics of ligand binding in the active site by means of hydrogen Iability, solvent isotope effects, and heme-insertion isomer trapping, all by NMR methods. The results of these studies portray dynamic solution structure of the Mb ligand …

Portland State Magazine, Portland State University. Office Of University Communications

Portland State Magazine

PSU’s alumni magazine, published 2-3 times a year. In this issue: The Pacific Northwest is ripe for a major quake in the not-so-distant future; layoffs and job cutbacks will persist in the new administration, but this may not be the best way for companies to go; does the Metropolitan Service District represent a loss of local control or a boon for delivery of regional services?; a PSU alumna has helped organize diaries from the Oregon Trail as a volunteer for the Oregon Historical Society; and more.

Viking 1993, Portland State University

The Viking (Yearbooks)

Portland State University 1993 yearbook

The Theory And Practice Of Community Policing: An Evaluation Of The Iris Court Demonstration Project, Charles Moose

Dissertations and Theses

This dissertation deals both with the theory and practice of community policing in the United States and elsewhere while focusing on a specific community policing project in Portland, Oregon. It discusses the history of police work in America, as well as that of the Portland Police Bureau. It also explicates the various meanings of "community policing," along with the problems and issues that have surfaced as the community policing movement has evolved. The research reported here was based on a project conducted by the Portland Police Bureau and numerous supporting agencies. The project was inaugurated in May 1990 with the …

Space, Consciousness, And Gender In Colette, William A. Parnell

Dissertations and Theses

Colette's desire, to reveal the different levels of difficulties in relationships, results in the creation of three masterpieces, L e Ble en Herbe, La Chatte, and La Vagabonde. Through her characters in these novels, the author exposes the spatial boundaries set by each couple. Also, she concentrates on the maturation of the protagonists. The woman's function in society transforms as she gains personal power, and she becomes self-reliant. Finally, Colette evades sexual stereotyping by introducing the reader to the issues of gender and androgyny. She helps to dispel the sexual myths around the. idea of normal stereotyping. Themes such as …

Nuclear Magnetic Resonance Investigation Of The Interaction Of Heme Binding Proteins With Snivprotoporphyrin Ix And Heme: Structure And Conformational Changes Of Myoglobin And Hemopexin, Ruba Saba Deeb

Dissertations and Theses

Tin protoporphyrin IX (SnPP) is currently under investigation for the treatment of hyperbilirubinemia. The study of the complex between SnPP and equine myoglobin (EqMb) by ¹H and ¹¹⁹Sn nuclear magnetic resonance spectroscopy (NMR) can be viewed as a general model for SnPP interaction with hemoproteins. The complex formed from the equilibrium mixture of SnPP and EqMb, SnPP•EqMb, was found to have essentially the same porphyrin-binding pocket as EqMbCO and SwMbCO, including the same porphyrin orientation in the major form of the two species. ¹¹⁹Sn NMR spectroscopy was used to demonstrate that the proximal His(93)F8-metal coordination is likely to be intact …

A Case Study Of The Acceptance Of The Tacoma-Pierce County Needle Exchange Program By Three Diverse Groups: Law Enforcement Personnel, Health Department Officials, And Program Clients (I.E., Intravenous Drug Users), Lauren Sue Ibrahim

Dissertations and Theses

Legitimate and underground needle exchange programs, specifically targeted for intravenous drug users (IVDUs) (i.e., currently the second largest risk group in the AIDS epidemic), have emerged in various locales in a desperate attempt to change their drug use practices and behaviors associated with the transmission of HIV-1/AIDS. This study focuses on one such program, the Tacoma-Pierce County Needle Exchange Program, in which the pioneering efforts of a private individual are provided, the manifestations of public entrepreneurism are examined, and in which various attributes of program acceptance are identified and explored. An introductory and exploratory case study approach is the research …

Urbanization In A Peripheral Capitalist State: A Guyana Case Study, Wazir Ahmad Ishmael

Dissertations and Theses

This research proposes to examine the process of urbanization in Guyana, South America. In particular, the objectives of this research are threefold. The first is to identify, describe, and evaluate some of the historic and current causes of urban growth and urbanization which have taken place in a peripheral capitalist state that was under the plantation mode and that illustrates a legacy of "uneven development." The second objective is to attempt to assess planning responses, through attempts by the state to formulate policies to deal more effectively with urbanization. And the third objective is to contribute to a dialogue between …

Nuclear Magnetic Resonance Study Of Antigen-Antibody Complexes, Including Sequence Specific Assignments And Structural Analysis Of Neurophysin As An Antigen Model, Elisar Jamil Barbar

Dissertations and Theses

The interaction between molecules is essential in a wide range of biological processes. A detailed knowledge of these interactions is necessary for understanding these processes. Among the systems that involve important interactions is the immune system. NMR spectroscopy has a large number of spectral parameters that were used in this work to study antibody-antigen interactions. These same parameters were also used to begin a structural analysis of a medium-sized protein, neurophysin, that has important interactions with neurohormones, and served here as a model antigen. A set of ligands differing in size and charge was designed and used to probe the …

Vision, Interpersonal Orientation And Personal Values In Elementary School Principals, Allan Leslie Weston

Dissertations and Theses

This study looked at possible relationships which exist between three personal characteristics variables believed to be associated with effective leadership in elementary schools. The three variables were (1) Principal Vision, (2) Principal Interpersonal Orientation and, (3) Principal Personal Values. The relationship between selected teacher, principal and school demographic variables and teacher's perceptions of their principal's vision was also explored.

Data were collected from 51 principals and 841 teachers in elementary schools from 10 school districts in the Portland, Salem and Vancouver metropolitan areas. Teachers were asked to score their perceptions of their principal's vision on the School Vision Inventory. The …

A Validation Study Of Components Necessary For The Professional Development Of School Business Officials, William Henry Dierdorff Iii

Dissertations and Theses

A key element of a profession is a formalized training program. School business officials in the United States and Canada face dynamic and complex issues without a standardized training program. This study surveyed a representative group to validate a curriculum model developed by a 1988 task force funded by the Danforth Foundation. Another objective was to increase awareness of the need for an effective training program for school business officials and the most appropriate sources to implement that. As indicated in the analysis, all components of the ASBO/Danforth model were considered important to the parties surveyed. There was no single …

Perceived Administrative Support For Teachers Of Urban At-Risk Students, Betsy Bennet-Costi

Dissertations and Theses

The purpose of this study was to investigate effective administrative support for successful teachers of urban at-risk students. The main difficulty in studying administrative support is that it comes in so many ways. Johnson’s (1990) theory of workplace variables and Butterworth's (1981) social exchange theory were the basis for this study. Failures of at-risk students threaten the well being of public schools and have become a generally recognized social problem of national priority. This study explores how principals act to influence the success of teachers as they work with at-risk students. It is grounded in the following four assumptions: 1. …

Attitudes, Motivations And Expectations Of Students And Instructors In An Intensive University Esl Summer Session, Ronald Andrew Ragsdale

Dissertations and Theses

All international students have specific motivations and expectations when learning English as a Second Language (ESL) in the United States, and recognizing the diversity of those motivations and expectations is the first step toward providing successful second language instruction. This study was designed to elicit the attitudes, expectations and motivations of two unique groups of students studying in the same classes in an ESL summer session at Portland State University (PSU), the preconception of the instructors, and the impressions and evaluations of the program upon its completion by the students, instructors, coordinators and administrators.

A successful curriculum can only be …

State Policy And Public Administration Impacts On An Emerging Industry: The Wine Industry In Oregon And Washington, Anthony Gene White

Dissertations and Theses

Oregon and Washington state administrative agencies’ impacts on economic development within the winery industry are examined. Policy cluster development appears to impact economic development programs differently in each state. The wine industry has flourished in both states since 1970, yet Oregon with 60% of Washington's population supports 10% more wineries. Oregon winery numbers continue to grow while Washington’s seem to have leveled out. From the literature and industry interviews, three variables were selected to be tested for their industry impacts:

1. domestic consumption (state population times wine industry per-capita consumption);
2. market domination (estimated from interviews and proportional market share); and
3. net …

An Implementation Analysis Of The Water Resources Development Act Of 1986, James Joseph Rich

Dissertations and Theses

Implementation research, an area once largely ignored in favor of policy design and impact assessment, now constitutes a significant portion of the policy analysis literature. One of the key issues addressed by the theory building portion of that literature is the necessity of precisely identifying implementation variables, conditions, or actions that measurably contribute to the success or failure of implementation efforts over a broad range of policies and programs, and to then suggest some order of significance. In order to test the validity of a variable set proposed by the literature, a multivariate implementation model was employed as the basis …

The Effects Of Rapid Heating And Cooling On The Composition, Structure, And Superconducting Properties Of Bi-Sr-Ca-Cu-O Compounds, Qing Duan

Dissertations and Theses

Bulk and thin film samples of Bi₂₋[subscript x]Pb[subscript x]Sr₂Ca₂Cu₃O[subscript y] compounds were prepared by suitable methods. The thin film and bulk samples were exposed to argon gas at temperatures of about 2000 °C and pressures of about 300 atm. in a ballistic compressor (BC) and then cooled at a rate of about 10⁵ °C/sec. The samples before and after this treatment were examined and compared using a transmission electron microscope (TEM), a scanning electron microscope (SEM), an energy dispersive spectrometer (EDS) , and an x-ray diffractometer (XRD). Resistance and magnetic susceptibility measurements were made to determine changes in superconducting temperature …

Semiconductor P-N Junction Space Charge Region Capacitance, Mohammad Humayun Habib

Dissertations and Theses

The classical capacitance voltage characteristics based on the depletion approximation, is adequate at reverse bias, but introduces errors at high forward bias. Because of its inherent simplicity and compactness this classical depletion model is well studied and widely used in circuit simulators. In this work, a new model for the semiconductor space charge region (SCR) capacitance, based on physical justification, will be derived. This new model takes three input parameters, C0 , Vbi and m, thus eliminating the fitting parameter FC currently used in SPICE. This new model is applicable for any applied voltage and will be compared with the …

Connected Painted Rectangles Experiments In Quantitative Shape And Contrasting Elements, Ann Shiogi

Dissertations and Theses

The thesis consisted of a series of paintings in which the canvases were individually painted in a predetermined way, then arranged and assembled more spontaneously in a final wall construction. Narrow limitations, such as working with only horizontal and vertical compositions and contrasting colors were specified. By working within a method or procedure, and by remaining strict to these guidelines, the ideas inherent in the paintings emerged and were then promoted.

The dominant ideas that developed out of the process of making the paintings were the use of both "found" shapes--found in leftover lengths of support material--and "found" means of …

Speaker Preferences Of Listening Behaviors That Lead To Perceived Listening : A Pre-Condition Of Perceived Understanding, Christine M. Carpenter

Dissertations and Theses

When attempting to communicate with another person, the success or failure that a communicator perceives, he or she interprets as understanding or misunderstanding. Research has shown that "perceived understanding" or the "feeling of being understood" is important in self-concept development. However, for some time researchers have focused on the listener's needs and the speaker's needs have been given less attention. Yet, the listener's role in meeting the speaker's needs, particularly in providing feedback to the speaker, is of utmost importance if the speaker is to have the "feeling of being understood." This research examined the concept of the "feeling of …

Faculty Senate Monthly Packet December 1992, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The December 1992 Monthly packet includes the December agenda and appendices and the Faculty Senate minutes and attachments from the meeting held November 1992.

A Comparison Of Developmental Sentence Score Patterns In Three Groups Of Preschool Children, Michelle Lynn Riback

Dissertations and Theses

Researchers have successfully labeled specific patterns of expressive language development as it appears in children developing language normally. Little research has identified particular patterns of expressive language in children who display expressive language disorders or delays. Longitudinal studies of expressively language impaired children indicate that linguistic, educational and social impairments exist long after the language impairment was first identified (Aram, Eckelman and Nation, 1984; Aram and Nation, 1980; Fundudis, Kolvin and Garside, 1979; Stark, Berstein, Condino, Bender, Tallal and Catts, 1984). If patterns of delayed or disordered language development are researched and possibly labeled in the early stages of language …

Correction Of Chromatic Aberration With An Electron Mirror, Michael Stewart Mauck

Dissertations and Theses

The theoretical basis for using electron mirrors as correctors of chromatic aberration is presented and an experimental verification of correction of chromatic aberration is demonstrated. A hyperbolic electrostatic electron mirror operating in its converging range and at unity magnification was used as a corrector. A novel separating system with deflections taking place at image planes was developed to implement the mirror without impairing the resolution. Correction was demonstrated in an electron optical probe system. The chromatic aberration was measured by means of the shadows cast by a fine mesh placed near the final image. The experimental method and equipment are …