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Pulse Evolution In Co₂ Lasers, Lee W. Casperson, M. J. Herbst, John J. Turechek

Electrical and Computer Engineering Faculty Publications and Presentations

Explicit formulas are examined for the development of optical pulses in gain‐switched or Q‐switched laser oscillators and for the distortion of such pulses in succeeding stages of laser amplification. The results are compared to data obtained with a TEA CO₂ oscillator‐amplifier system.

"The Call For A New International Economic Order, Part 1", Joaquin González, Ruth Hinerfield

Special Collections: Oregon Public Speakers

No abstract provided.

A Methodology For Determining Mass Movement Susceptibility For Land-Use Planning, Vern Walter Cimmery

Dissertations and Theses

Land-use planning takes into consideration geologic hazards in order to protect both life and property. One type of geologic hazard is mass movement. Mass movement is a collective term for the downslope movement of mass units of debris e.g., bedrock, soil, and subsurface material, resulting from the influence of gravity and involving transporting media such as ice, snow, water, and air. As population increases, further pressures are placed on existing land use. Many areas once considered unsuitable for development due to steep slope or other physical characteristics are now experiencing problems. These areas, due to their physical characteristics, can be …

Portland State Perspective; October 1976, Portland State University

Portland State Perspective

A quarterly alumni newsletter. In this issue: debut of Portland Ballet Company; senior citizens' lifelong learning at PSU; Project Outreach launched by Department of Art and Architecture.

Analytic Modeling Of Gain‐Switched Lasers. I. Laser Oscillators, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

Detailed mathematical models are derived for the evolution of light pulses in gain‐switched laser oscillators. Unlike previous instantaneous‐switching models, arbitrary pump and spontaneous relaxation rates are considered. Explicit expressions are obtained for the gain and pulse characteristics in several practical situations, and both homogeneous and inhomogeneous limits are considered. By proper adjustment of the laser pump any output‐pulse shape can be obtained. The results are especially relevant for recent short‐pulse ultraviolet lasers and also for more conventional devices such as TEA CO₂ lasers.

Analytic Modeling Of Gain‐Switched Lasers. Ii. Laser Amplifiers, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

The pulse transfer characteristics of gain‐switched laser amplifiers are investigated analytically. New closed‐form solutions have been obtained including arbitrary space‐ and time‐dependent pump distributions. The general results are specialzied to the important cases of uniform and traveling‐wave excitation. Input‐pulse shapes considered include step functions, practial oscillator output pulses, and also the inherent spontaneous‐emission noise. The results lead to improved models for pulse amplifiers and mirrorless traveling‐wave lasers. By proper choice of pump characteristics arbitrary output‐pulse waveforms can be synthesized.

Mammals Of The Bull Run, Edward M. Thatcher

Dissertations and Theses

This study of mammals of the Bull Run Planning Unit has a dual character. First, mammals of special scientific or natural history interest such as threatened or endangered species were sought. This was in conjunction with a Mt. Hood Bull Run Planning Unit. Second, a zoogeographical study of mammals of the Bull Run was performed. Abundance and distributional data was recorded for each species observed. This data was related to availability to moisture as indicated by plant associations trapped. Difference in habitat utilization along a moisture gradient was investigated as a possible coexistence mechanism for sympatric small mammals in the …

Biostratigraphy Of The Snowshoe Formation (Jurassic) In The Izee Area, Grant County, Oregon, Paul Lawrence Smith

Dissertations and Theses

Using the standard Jurassic zonal scheme, this work attempts to determine the ages of the four members of the Snowshoe Formation that crop out in the Izee area. As a corollary, regional correlations are possible. The stratigraphic relationship between the Snowshoe Formation, the subjacent Hyde Formation and the superjacent Trowbridge Formation is also investigated.

Over one thousand fossils were collected from five stratigraphic sections and eight localities. The sections were measured using tape and compass techniques and the relative stratigraphic ranges of the fossils calculated using a computer program written specifically for this project. The ammonite fauna, dominated by the …

Historical Aspects Of Indian Life And Their Effects On The Urban Indian, Ramona Cliff

Dissertations and Theses

The purpose of this study is to explore one aspect of American Indian life: the personal situations and political implications of the American Indian residing in an urban setting.

William Dunbar: An Analysis Of His Poetic Development, G. David Beebe

Dissertations and Theses

This thesis examines the work of William Dunbar, a sixteenth century Scottish poet, in order to demonstrate that he is not, as he is often styled, a Scottish Chaucerian. It makes an analysis of the chronological occurrence of forms and themes in his poetry which indicates that his work can be divided into three periods: (1) an initial period in which his work deals with traditional matter and forms; (2) a second period in which he develops a distinctly personal poetic voice; and (3) a final period in which he perfects this personal voice and then relinquishes it for a …

International Variation In Metropolitanism: National Integration Into An International System Of Countries As An Important Consideration, Michael Lee Lindsay

Dissertations and Theses

The research reported here is directed toward the determination of whether or not the proportion of a country's population living in cities of 100,000 or more is significantly affected by that country's involvement in trade relations with other countries. The proportion of a country's population living in cities of 100,000 or more was termed its level of metropolitanism. It is proposed that international variation in metropolitanism is a function of, among other things, the country's position relative to other countries in a world system of intersocietal functional linkages. It is argued that one of the best indicators of the functional …

Coordination In Social Service Systems: The Area Agency On Aging As A Case Study, Terrie Todd Wetle

Dissertations and Theses

It is the purpose of this research to examine the interactions between organizations and the work of coordinating agencies in influencing those interactions using social exchange theory. A model was developed, incorporating elements of exchange theory, and the components of that model examined in the community. Techniques of change and the outcomes of activities of the coordinating agency were examined in an effort to develop a "case study" of a coordinating agency's activity in the community.

Historically, social services were provided in the community through informal, often familial, networks. With the urbanization of society, social services have become more formalized …

Electrical Conductivity Of Thin Lecithin-Cholesterol Membranes Due To 2,4-D, 2,4-Db, 2,4,5-T And 2,4-Dcp, Malkanthi Paulis

Dissertations and Theses

The effect of the following pesticides on DC electrical conductivity of lecithin-cholesterol membranes has been studied: endothall, paraquat, diquat, 2,4-D, 2,4-DB, 2,4,5-T, 2,4-DCP. It has been found that the ions of endothall, paraquat and diquat are essentially membrane impermeable and that they do not bind to the membrane surface. In contrast, 2,4-D, 2,4-DB, 2,4,5-T and 2,4-DCP induce electrical conductivity in lecithincholesterol membranes and in addition they also cause an increase in the nonactin-K⁺ membrane conductivity.

The compounds 2,4-D, 2,4-DB, 2,4,5-T and 2,4-DCP basically behave as class II uncouplers. The kinetic scheme of charge transfer across the membrane, based on …

Homosexuality Among Women: Historical And Current Views In Psychology, Craig Bracy

Dissertations and Theses

The purpose of this review is to evaluate the methodology of past and present research with female homosexuals and then to summarize the current state of knowledge in psychology and psychiatry. The data presented in this review have been derived predominantly from material abstracted in the Medicus Index (1900-1976) and Psychology Abstracts (1927-1976).

This reviewer has established specific criteria by which all studies throughout this literature review will be examined. These are: sample size, sampling of experimental control groups, variable controlled (age, education, etc), how sexual orientation was determined, and tests and questionnaires employed, their reliability, validity, administration, and interpretation. …

Stratigraphy, Structure, And Petrology Of The Snoqualmie Pass Area, Washington, Lawrence A. Chitwood

Dissertations and Theses

The Snoqualmie pass area lies about 50 mi (80 km) east of Seattle, Washington, along the crest of the Cascade Range. Five stratified units, forming a composite section over 22,000 ft (6700 m) thick, are recognized in the area. They were deformed and later intruded by granodiorite and quartz monzonite porphyry of the Snoqualmie batholith (middle Miocene). The oldest unit, the Denny Formation (Permian), 7000 ft (2100 m) thick, consists of interstratified basalt, andesite and dacite volcanic rocks and limestone and chert beds. This formation is unconformably overlain by a thick conformable sequence of early Tertiary strata which are subdivided, …

Verbal Strategies In Small Group Communication, Christine Marie Bunsick

Dissertations and Theses

The purpose of this study is to investigate certain types of verbal communications people use in small task-oriented groups. The verbal communications analyzed are certain phrases a speaker may use prior to the central idea of the statement uttered. These verbal communications are referred to as "language tactics".

Language tactics are defined here as specific phrases a speaker may use to excuse, justify, rationalize, or interpret for the listener(s) what the speaker is about to say before saying it. The purpose of this study is to look at language tactics as they are used by members of small task-oriented groups …

The Nature And Distribution Of Turf-Banked Terraces In The Olympic Mountains, Washington, Katherine Jane Hansen

Dissertations and Theses

Well-developed turf-banked terraces are found in the Olympic.Mountains of Washington, but not found· in the other mountains of the Pacific Northwest. My study is based just on the Olympic Mountains and the·major thrust of my investigation is aimed at answering questions: What is the nature of turf-banked terrace development in the Olympic Mountains? Why does it occur, and what is its local ecological significance? The major field investigations were carried out during the summer of 1975.

A two hour reconnaissance was made over the Olympic Mountains to plot the distribution of turf-banked terraces; the most striking discovery was that terraces …

A Comparative Study Of Aristotle's Poetics And Ezra Pound's Abc Of Reading, Michael P. Hagensick

Dissertations and Theses

This paper is a comparative study of Aristotle's Poetics and Ezra Pound's ABC of Reading to discover and determine values in literature, especially poetry, which reflect on the nature and the manifestations of human communication. I feel that scholars in the field of communication can benefit personally and academically from exposure to those poets who have expressed themselves on the reasons or the manners in which people communicate. To pursue this question requires the use of a guide to poetry, a method by which I can learn to recognize a poem on sight; so that when it comes to discourse …

The Addition Of Sf5br To Unsaturated Systems, Qui-Chee Wendy Wang

Dissertations and Theses

Addition reactions of pentafluorosulfur bromide with unsaturated substrates were studied and four new compounds containing the pentafluorosulfur group have been prepared.

The mechanism for these reactions seems to involve a radical addition pathway. In reaction with CH₂=CFC1, CF₃C≡CH and CH₃C≡CH the SF₅ radical attacks the carbon atoms carrying the most hydrogens. The reaction with CF₂=CHCl is interesting, as by analogy with other fluoroolefins, the SF₅ primary attack should occur.at the CHCl group, however, SF₅CF₂CHC1Br was found as the only product for this reaction. The reaction of …

A Holistic Approach To Social Work Education, Lynda M. Wright

Dissertations and Theses

The thesis examines social work education from a broad perspective, examining aspects of stress (empathy, self awareness, needs of students, needs of professionals), trends in graduate education and the mind-body-spirit connection from other fields, specifically Hatha yoga, Gestalt Therapy, Aikido, Meditation and other modes of treatment.

A Development Of Natural Forms In Multiple Glass Shapes, Anthony Parker

Dissertations and Theses

This thesis is the description of an attempt to overcome the restrictions of glass sculpture by expanding and developing techniques for the creation of organic glass forms which are consolidations of individual glass shapes.

A Descriptive Study Of Eleven Parent Conferences In A Child Development Center, Yolanda A. Moser

Dissertations and Theses

This is a report of a descriptive study of eleven video-taped diagnostic conferences involving parents of developmentally delayed children who have been assessed at a training facility which provides diagnostic services to a variety of delayed or handicapped children. The variables described were: (1) the amount of verbal participation of staff and parents; and (2) parent ratings of satisfaction obtained from a brief questionnaire administered orally.

The data revealed that: (1) there is no relationship between parent verbal participation and parent satisfaction with the conference; and (2) there is a relationship between parent satisfaction and process and content factors in …

Postdivorce Parental Roles: A Descriptive Study, Victor R. Congleton, Lisa Christina Londos

Dissertations and Theses

Divorce is becoming an increasingly common phenomenon in American society. Its occurrence is increasing both in absolute and relative numbers, and also in its involvement of minor children. As will be demonstrated below, very little is actually known about the process of divorce or about its impact on the members of the family. Of particular concern is the effect of divorce on the children invo1ved, and the decisions and practice of the divorcing parents regarding their subsequent parenting relationship to the children.

The authors of this report intend to study a random sample of divorcing couples and to derive a …

The Analysis Of The Deflection And Containment Of A Hot Plume By Side Draft Exhaust Hooding, Douglas H. Macgowan

Dissertations and Theses

A common industrial ventilation and pollution problem results when a thermally buoyant polluted plume of air must be exhausted away from a work area to allow achievement of air pollution standards. Generally, a close fitting canopy hood is one of the most effective means of exhaust containment; however, physical restrictions or the operation itself often prevent such an arrangement, and a hood located to the side of the operation is required. This arrangement requires the exhaust to bend and contain the vertically rising plume with a horizontal sweep of exhaust air across the surface of the operation.

A review of …

An Examination Of The Relationship Between Population Density, Density Related Social Factors, And Physical Morbidities, Douglas King Huebner

Dissertations and Theses

The relationship between the number of persons per room in the home and the relative occurrence of stress-related morbidities of hospitalized patients is investigated. The social factors of age, social class, and level of social support also are examined as they relate to both density and morbidity type occurrence. The population under study is composed of all Kaiser-Permanente Medical Care Program members twenty years of age and older, discharged from Bess Kaiser Hospital during 1974, and whose diagnosed morbidity was included in specific morbidity categories. All data were obtained through the facilities of the Health Services Research Center, Kaiser Foundation …

The Chromosome Constitutions Of A Hybrid Salmonid And Its Parental Types: Salmo Gairdneri And Salmo Clarki, Peter Bruce Valentine Jacky

Dissertations and Theses

A study was undertaken to investigate the application of tissue culture and histochemical banding techniques normally used in mammalian studies to fish cells and to examine the mechanisms of chromosome evolution and speciation in salmonids by comparing the chromosomes of the hybrid to those of the parental types. The application of banding techniques was generally unsuccessful in revealing bands, though quinacrine staining did reveal the presence of two fluorescent spots in the vicinity of the centromere. These were thought to be heterochromatic blocks, possibly related to the high incidence of centric fusion or fission in salmonids. Results of chromosome analysis …

Evaluation Of The Institute Of Transportation Engineers Program For School Pedestrian Crossing, Nabil Shafiq Hamadeh

Dissertations and Theses

The Technical Council of the Institute of Transportation Engineers (ITE) developed a program for school crossing protection. The intent of this thesis is to evaluate the ITE program within. the context of those programs developed by other agencies throughout the nation. Research materials were obtained from the appropriate Federal, state, local and other agencies through papers, articles, reports and correspondence. Upon the analysis of these sources, the ITE program was found to be deficient in several ways. Recommendations for modifying the program which are set forth herein include a revision of the ITE program including the school route map, clarification …

Lifespring's Basic Seminar: An Evaluation Study, Patricia A. Percival

Dissertations and Theses

This was a three part study designed to evaluate the effectiveness of the Basic Seminar, a five-day personal growth training designed and presented by Lifespring, Inc. The instrument used in this study was the Personal Orientation Inventory (POI) published in 1963 by Everett L. Shostrom and copyrighted by Edits Publishing Co., San Diego, CA. This inventory consists of 150 two-choice comparative value and behavior judgments. Two basic scales measure personal orientation, inner directed support and time competence. Ten subscales measure different conceptually important elements of self-actualizing. The items are scored twice, once for the two basic scales and second for …

Assessment Of Hearing Sensitivity By Use Of The Acoustic Reflex In The Geriatric Population, Donna Elvira Gilham

Dissertations and Theses

The purpose of this study was to investigate the use of the SPAR test (Sensitivity Prediction by the Acoustic Reflex) on a sample of older adults who professed negative otologic histories. Twenty-seven subjects, ranging in age from sixty-four to eighty-three years of age (54 ears) were ultimately chosen as subjects. A young adult group, ranging in age from eighteen to thirty years of age, with normal audiometric hearing levels served as controls. Reflex threshold levels were obtained using 500 Hz., 1000 Hz., and 2000 Hz. pure tones and noise stimuli. Assessment of hearing loss was calculated on the difference between …

Debye–Hückel Theory For Rigid‐Dipole Fluids, John D. Ramshaw

Physics Faculty Publications and Presentations

The dipolar analog of classical linearized Debye–Hückel theory is formulated for a finite fluid system of arbitrary shape composed of rigid polar molecules. In contrast to the ionic case, the dipolar Debye–Hückel (DDH) theory is nonunique due to an inherent arbitrariness in the choice of a local field E*. This nonuniqueness is expressed in terms of a parameter ϑ related to the ellipticity of the spheroidal cavity used to define E*. The theory then leads to an expression for the direct correlation function c (ϑ) as a function of ϑ. Only the short‐range part of c (ϑ) depends upon ϑ; …