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Ultrashort Pulse Production In Synchronously Pumped Mode-Locked Dye Laser Systems, Duncan Leo Macfarlane

Dissertations and Theses

The concern of this dissertation is the understanding and improvement of a class of lasers that is responsible for some of the shortest optical pulses available today. In particular, we seek ways to produce from synchronously pumped mode-locked dye laser systems, shorter pulses of higher intensity with improved pulse-to-pulse consistency. Specific topics.that are discussed herein include the study of the role of the pump pulse in synchronously pumped mode-locked lasers, the study of the pulse shaping and shortening due to an intracavity saturable absorber, and the study of a fundamental pulse train instability associated with these lasers.

Commercial Activities And The Geography Of Movement In A West African Urban Market: A Study Of Market-Stall Traders In Onitsha With Implications For Transport Policy, Krys Chukwuma Ochia

Dissertations and Theses

The purpose of this study is to understand the non home-based travel behavior of urban market traders in Onitsha, Nigeria, where 58-70% of the labor force is engaged in trading.

Relevant trip-inducing variables--gender, location, a means of personal transportation, size of stall and, type of good sold--were selected to assist in theorizing about the travel behavior of traders. Using a systematic sampling methodology, 246 stalls were selected and the MLR model was applied in data analyses.

The results show that a typical stall is occupied by either one or two traders. There are three male traders for every female trader …

Strategic Implications Of R&D Investment On Dynamic Business Systems, George F. Farrimond Jr.

Dissertations and Theses

The United States' ability to compete in many international markets has been based on competitive advantage in high-technology products. Until recently, these industries had a favorable trade balance but in 1987, it slipped to deficit of $0.6 billion. Management of research and development programs is one of the most important elements in remaining competitive. Therefore, this research study of 291 high-technology firms was undertaken to determine if: (1) a positive relationship exists between the amount of investment in research and development (R&D) and a firms success in sales, net income, or market share, (2) excessive investment in R&D would decrease …

A Preliminary Analysis Of Beneficiary Discharge Status And Post-Hospital Placement Before And After The Implementation Of Medicare's Prospective Payment System, Anne Marguerite Wilkinson

Dissertations and Theses

In recognition of the inherently inflationary nature of retrospective reimbursement, the Reagan Administration enacted legislation that substantially changed Medicare's hospital reimbursement system. The Prospective Payment System (PPS) mandated paying hospitals a fixed payment, set in advance, based on the patient's diagnosis rather than retrospectively paying for all services delivered to a patient. Critics contend that PPS introduces incentives for hospitals to conserve resources during the hospital stay and to shift care to less costly settings, both potentially affecting quality of care to the elderly. The question addressed by this dissertation is whether there were changes in the discharge health status …

The Preparation And Involvement Of Oregon Speech-Language Pathologists In Dysphagia, Christine Marie Gaynor

Dissertations and Theses

The purpose of this study was to determine the amount, type, and content of training acquired by SLPs presently working in dysphagia management, as well as their level of involvement. A questionnaire was sent to 97 Oregon SLPs. Of these, 77 (80%) responded, and 52 met criteria. The resulting data indicated that SLPs involved with dysphagia work in a variety of settings, including hospitals, nursing homes, home health agencies, and private practice. Seventy-two percent of the subjects have been involved with dysphagia management for less than 10 years; 79% treated between 1 and 10 patients for dysphagia the month prior …

Social Construction Of Sexual Equality In Distilled Beverage Advertising, Kathleen Dianne Lecoe-Cannucci

Dissertations and Theses

One aspect of the role of advertising in the process of maintaining and reinforcing or challenging the socially constructed worlds of maleness and femaleness, and especially the portrayal of the "woman's place," was explored in this study.

Cultural Relativism In Intercultural Communication Theory : A Descriptive And Heuristic Study, Ellen Linnea Trygstad

Dissertations and Theses

The purpose of this descriptive study was to determine how the concept of "cultural relativism" is used in the current literature pertaining to intercultural communication. This concept is central to much of the work being done on face-to-face intercultural communication, but a preliminary review of that literature indicated ambiguity and lack of concurrence among authors' views regarding the concept. This research was designed to describe the range of authors' views on cultural relativism as well as to provide some historical and critical perspective regarding "cultural relativism."

Naive Listener Judgments Of Esophageal Air Intake Noise Acceptability, Janet Gordon Daucsavage

Dissertations and Theses

The purpose of this study was to determine the judgments by naive listeners of the acceptability of esophageal air intake noise and compare those ratings to their judgments of overall esophageal speech proficiency. The primary question this study sought to answer was: Are naive listener judgments of overall esophageal speech proficiency significantly correlated with naive listener judgments of esophageal air intake noise acceptability? The secondary question asked was: Are naive listener acceptability judgments of air intake noise significantly correlated with sophisticated listener acceptability judgments of air intake noise?

The Output Of Compression Hearing Aids With A Transient Input Signal, Michael Andrew Berg

Dissertations and Theses

The output characteristics of five compression hearing aids in response to a transient signal were examined to determine if, the input-output function (i.e. output levels of the hearing aid as a function of input level) for a transient signal could be made to approximate that of a continuous signal, by activating the compression circuit with a second signal (activator). Input-output functions for three input compression and two output compression hearing aids were obtained in order to determine if: 1. the automatic gain control (AGC) was activated by the second signal and the transient signal output approximates that of a continuous …

The Use Of Auditory Brainstem Responses In Determining The Maximum Outputs Of Hearing Aids, Kathryn Jean Merry

Dissertations and Theses

Uncomfortable listening level (UCL) is a behavioral measure which is currently used to set the maximum outputs of hearing aids. This study explored the feasibility of prescribing the maximum outputs of hearing aids by using results obtained from auditory brainstern response (ABR) testing. More specifically, this study compared ABR wave latencies with behaviorally-measured UCLs for a single cycle 3 kHz stimulus in normal-hearing adults.

Reading Comprehension In Dementia Of The Alzheimer's Type : Factual Versus Inferential, Donna Jensen Graville

Dissertations and Theses

The purpose of this study was to investigate the reading comprehension abilities of those with mild and moderate dementia of the Alzheimer's type (DAT) and compare their performance to that of a sample of non-demented elderly. Thirty-eight male subjects were used, 20 non-demented elderly, nine mild DAT and nine moderate DAT. All were administered level B of the NRST. This test contains questions requiring three levels of inference: literal, translational, and high-level inference.

U.S.-Soviet Interchange : An Examination Of The Underlying Assumptions Of U.S. Peace Organizations Sponsoring Contact With Soviet Citizens, Hyla Rosenberg

Dissertations and Theses

The research focus of this study was upon U.S. peace organizations which sponsor face-to-face contact with Soviet citizens. Nine U.S. peace organizations were included in the study, the names of which were acquired through a publication produced by the Institute for Soviet-American Relations. The researcher contacted approximately 28 organizations either by telephone or mail, requesting that organizational literature (program descriptions, newsletters, brochures, pamphlets) be sent to the researcher for the purpose of conducting a rhetorical analysis of such literature.

The Effects Of Bandwidth Limiting Tuning Elements On A Synchronously Pumped Mode-Locked Dye Laser, Bahram Zandi

Dissertations and Theses

In this study an improved description of the bandwidth limiting tuning filters has been introduced into a semiclassical model for a synchronously pumped mode-locked dye laser system. This model is an improvement over the traditional rate equation approach since it has detailed representations of the energy levels, rotational distribution, and coherence effects. The new set of equations has been solved numerically using the best available values for the various parameters, and autocorrelations have been computed for a range of different length detuning and bandwidth limiting elements. In the experiments, an acousto-optically mode-locked argon ion laser is used to synchronously pump …

An Analysis Of The Relationship Between Learning Style Perceptual Preferences And Attitudes Toward Computer-Assisted Instruction, Mary Brambilla Mcfarland

Dissertations and Theses

The purpose of this investigation was to identify the perceptual learning style preferences of nursing students and to examine the relationship, if any, among students whose learning style perceptual preferences were identified as being auditory, tactile or visual and their attitudes toward the use of computer-assisted instruction (CAI) in the areas of comfort, creativity and function. The relationships between nursing students' perceptual learning style preferences and the following were also examined: (a) the amount of time they spent using the computer program, Cardiac Exam Bingo; (b) whether the use of the computer program added to their learning the content about …

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

Portland State Magazine

PSU’s alumni magazine, published quarterly. In this issue: PSU faculty experience Middle Eastern and North African cultures through study-travel program; joint program encourages ethnic minorities to become teachers; Portland’s reputation for racist violence; and more.

A News Discourse Analysis Of La NacióN, Jimen Chan

Dissertations and Theses

This thesis is a study of La Nacion, the largest circulating newspaper in Costa Rica. The purpose of this study is to examine whether claims made by La Nacion regarding their fairness and balance of news coverage are justified.

Land Information System: Strategies For Local Governments In Oregon, Oregon. State Map Advisory Council

Center for Urban Studies Publications and Reports

The purpose of this report is to disseminate the findings and recommendations from the deliberations of the Oregon Land Records Committee (OLRC) of the State Map Advisory Council (SMAC). The OLRC consists of state and local government officials and professionals, and representation from utilities and private sector firms involved in the maintenance and use of land records and geographic information systems (GIS) for the analysis of data about land. These individuals have given freely of their time and experience in furtherance of the mission and goals of the OLRC.

This report is directed to professionals and public officials in local …

Normative Data On The Auditory Memory Test Battery For Ages 9 Through 13 Years, Elisabeth Y. Carter

Dissertations and Theses

Auditory short-term memory (STM) is important for speech and language development and for learning new information presented auditorily. Research has shown that auditory STM ability is of a developmental nature in the 5 through 8 year age range for a variety of auditory stimuli. Many tests and subtests are available to measure auditory STM ability, however one test, the Auditory Memory Test Battery (AMTB) measures auditory memory span and memory for sequence for 5 types of stimuli.

The purpose of this study was to collect normative data on the AMTB scores of normal 9 through 13 year old students and …

Speech Reception Via Bone Conduction, Sherry G. Morris

Dissertations and Theses

The purpose of this investigation was to determine if the performance-intensity function for spondees delivered via bone conduction (using the Radioear E-72 and Pracitronic KH-70) differed from the performance-intensity function for air conduction (using TDH-39 earphones). A secondary consideration addressed in this study was the comparison of the discrimination scores using the three transducers. Performance-intensity functions for spondee thresholds were calculated on 12 normal hearing subjects using two bone conduction vibrators, the Radioear B-72 and Pracitronic KH-70, and TDH-39 earphones. Results indicated that there was no significant difference between the performance-intensity function of speech via bone conduction as compared to …

Law Enforcement Services In Clackamas County: Description And Financial Analysis, Judy Seppanen Davis, Peter B. Morris, Mark Bechtel, Jan Monroe, Charles Tracy, Sheldon Edner

Center for Urban Studies Publications and Reports

This report was prepared for the Clackamas County Blue Ribbon Committee on Law Enforcement by the Center for Urban Studies, Portland State University. The report provides a description of the current system of law enforcement service provision in the County by city and County service providers. It also analyzes the current financing process of law enforcement with regard to the equity of service received in relation co amounts paid by city and County residents. The analysis focuses only on law enforcement and does not address rhe other services provided by the County or other jurisdictions. Further, the findings presented here …

Faculty Senate Monthly Packet December 1988, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The December 1988 Monthly packet includes the December agenda and appendices and the Faculty Senate minutes and attachments from the meeting held November 1988.

Employment Decline I Timber Dependent Regions, Anthony M. Rufolo, James G. Strathman, Lois M. Bronfman

Center for Urban Studies Publications and Reports

Employment in the wood products industry in Oregon has declined over the past decade despite the resurgence in demand for the products of the industry in the last few years. Because of the dependency of rural regions on this industry, the Ford Foundation funded the authors to undertake a study of the causes and consequences of employment decline within the industry. Such information can contribute to the development of strategies for improving the economic viability of these regions.

Tunber dependent regions in Oregon fit the classic export-base model of economic development These areas produce wood products for export to other …

Coverbal Behavior Of Aphasic And Right Hemisphere Damaged Subjects In Conversation, Jill Duvall

Dissertations and Theses

The frequency and duration of six coverbal behaviors were examined in two experimental groups and one control group. Conversational samples of ten aphasic subjects, ten right hemisphere damaged (RHD) subjects, and ten matched, non-brain damaged (NBD) control subjects were scored for frequency and duration of eye contact, head nod, head shake, head tilt, smile and eyebrow raise. Only the frequency of smile was found to differ significantly; the RHD subjects smiled less often than either of the other two groups.

Geographic Information Systems: Research Issues, Kenneth Dueker

Center for Urban Studies Publications and Reports

GIS research has evolved by trial and error. We need to think more systematically about GIS research. New technology and societal needs are important determinants of issues that govern GIS research strategies. URISA has a stake in fostering GIS research, particularly research that is appliications driven.

Report On Ballot Measure 8 Revokes Ban On Sexual Orientation Discrimination In State Executive Branch, City Club Of Portland (Portland, Or.)

City Club of Portland

No abstract provided.

Information Report On Burglary In Multnomah County, City Club Of Portland (Portland, Or.)

City Club of Portland

No abstract provided.

From Myth To History: Yap Ah Loy And The Heroic Past Of Chinese Malaysians, Sharon Carstens

Anthropology Faculty Publications and Presentations

The exploration of differing historical interpretations has become an area of growing interest to anthropologists and historians alike, who have come to recognize that diverse interpretations of the same events can create as powerful a force for future actions as the events themselves. Following this approach, history becomes not so much a narrative progression of events, as shifts in meaning structures over time. The impact of such a perspective on scholars of Southeast Asian societies has led to both an increasingly critical use of colonial sources as well as to renewed interest in native or indigenous documents. We have also …

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

Portland State Magazine

PSU’s alumni magazine, published quarterly. In this issue: Predicting presidential performance is the subject of the day for professors Jim Heath and David Smeltzer; paint brush to canvas has become light pen to video terminal in one Art Department office; advanced degrees in science and engineering are the focus of far-reaching plans at Portland State; a professor and a student from PSU heads up an experimental needle exchange program; and more.

Meeting Notes 1988-08-11 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Advertising In Restrooms, Karsten C. Hofmann

Dissertations and Theses

There is a common belief that the special situation one encounters in restrooms is likely to evoke negative associations between the setting and a potential product, and that these presumed associations make advertising in restrooms incompatible with the objectives of advertisers.

This general proposition was questioned on theoretical grounds. It was argued that the specific situation in a restroom would be conducive to advertising goals in a number of ways. In addition, while negative associations may occur with certain kinds of products, others were hypothesized to be unaffected. In particular, the potential value of restrooms for communicating public education issues …