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Propagation Of Airy-Hermite-Gaussian Waveguide Modes In Free Space, Lee W. Casperson, O. M. Stafsudd, Leroy V. Sutter, Jonathan Gary Grossman

Electrical and Computer Engineering Faculty Publications and Presentations

The cavity modes of metal strip waveguide lasers are most simply expressed in terms of Airy-Hermite-Gaussian functions. The free space propagation of the resulting beam modes has been examined, and both near- and far-field patterns have been calculated and measured. Phase plates may be useful for enhancing the far-field intensity.

Lateral Coherence Of Aerosol-Scattered Laser Radiation, Donald D. Duncan, D. E. Larch

Electrical and Computer Engineering Faculty Publications and Presentations

To assess the probability of detection (by interferometric techniques) of illumination by a coherent source, we characterize the lateral coherence of the off-axis aerosol scattered radiation by applying the van Cittert-Zernike theorem. We find that, for 1.061-pm radiation at a target range of 1 km, the scattered radiation beyond 3.5 cm off axis does not display appreciable lateral coherence.

Faculty Senate Monthly Packet December 1983, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The December 1983 Monthly packet includes the December agenda and appendices and the Faculty Senate minutes and attachments from the meeting held November 1983.

Faculty Senate Monthly Packet November 1983, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The November 1983 Monthly packet includes the November agenda and appendices and the Faculty Senate minutes and attachments from the meeting held October 1983.

Ionization Of Heavy Atoms By Polarized Relativistic Protons, P.T. Leung, M. L. Rustgi

Physics Faculty Publications and Presentations

The effect due to the polarization of the incident high-energy (~GeV) proton beam on the ionization cross section of heavy atoms is investigated. In particular, with the use of Darwin wave functions for the atomic electron, the effect for hydrogenlike atoms is worked out. A numerical illustration shows that the polarization effect is completely insignificant. The authors also conclude that the K-shell ionization process is completely insensitive to the polarization of the incident beam.

Geophysical Strain And Tilt: Measurement Methodology And Analysis Of Data, Robert Mackay

Dissertations and Theses

Tilt and strain meters were installed on the Portland State University campus in the summer of 1982 and data was collected for 4 months. Instrument selection, operation, installation and performance are discussed.

Suggestions that could enhance data quality and data collection efficiency are presented.

An analysis procedure is suggested and an example of this procedure for an interval of data is discussed. The influence of the temperature, pressure, rainfall and solid earth tides on the signal is investigated, as well as the correlation between similar channels of the different tilt instruments. The temperature, rainfall and solid earth tides were all …

The Application Of Exact Electrodiffusion Theory To Ion Transport Across Lipid Bilayer Membranes, Scott Cohen

Dissertations and Theses

The question of how ions interact with each other and with the potential energy barrier in thin lipid bilayer membranes has interested investigators for several years. The application of electrodiffusion theory to the study of this question is the central theme of this work. We have calculated current-voltage curves for barriers of various shapes and heights, in each case by means of numerically integrating the exact electrodiffusion equation as well as this same equation in the constant field approximation. We have also calculated the total charge in the membrane for the same conditions under which we have calculated the current-voltage …

Generalized Response Of Chemiluminescence Analyzers, A. A. Mehrabzadeh, Robert J. O'Brien, Thomas M. Hard

Chemistry Faculty Publications and Presentations

The mass flow and chemical kinetic equations for a gaseous chemiluminescence (CL) analyzer are formulated and solved. The resultant equation can be used to predict the absolute response of the analyzer as a function of the sample flow rate, the sample gas pressure, the chamber pressure, the chamber volume, the mass flow rate and mole fraction of the reagent gas, and the rate constants of the relevant chemical processes. Thus, the equation allows optimization of these parameters. It is shown that for varying sample pressure the analyzer can be used to measure either concentration or mole fraction and that interfering …

Derivation And Test Of Predictions Of A Discrete Latent State Model For Signed Number Addition Test Performance, Kentaro Yamamoto

Dissertations and Theses

This study is an investigation of the performance of a discrete latent state model devised by Paulson (1982) to account for signed-number arithmetic test data gathered by Birenbaum and Tatsuoka (1980). One hundred twenty nine students took a test which consists of sixteen item types with four parallel arithmetic items of each type. The present study utilizes the five addition item types of four items each; hence, there are four parallel subtests. Responses to the addition items can be analyzed in terms of two components: the sign component (is the sign correct?), and the absolute value component (is the size …

1983 Commencement Program, Commencement

Commencement Archives 1980-89

The program for the Portland State University 1983 Spring Commencement ceremony, held at Memorial Coliseum on June 12, 1983, in Portland, Oregon.

Opening statement by Gary Miranda, Poet-in-Residence, Reed College; opening remarks by Louis B. Perry, Oregon State System of Higher Education, and Mary Christine Bailey, Class of 1983.

Depositional Model Of The Antelope Coal Field, Wyoming, Christine M. Budai

Dissertations and Theses

The coal-bearing sediments of the Antelope coal field in the southcentral Powder River Basin, Wyoming were deposited in paludal and tributary subsystems of the fluvial system that existed in the basin during the early Tertiary. A depositional model for the Antelope coal field was constructed from data collected from approximately 500 drill holes that penetrated the upper 90 meters (300 feet) of the Fort Union Formation. The depositional environments were interpreted from lithologic descriptions and guidelines established in the literature.

The two main coal seams at the Antelope coal field are the Anderson and stratigraphically lower Canyon coal seams. They …

An Internal Review Of A Discipline: Journal Editors' Opinions Of Paradigm Development Within Speech Communication, Laurie A. Houghton

Dissertations and Theses

A review of the literature on paradigm development within academic fields revealed that researchers have drawn distinctions between disciplines with greater paradigm development (discussed as discipline-wide consensus) and disciplines with lesser paradigm development. Several of these investigations centered on paradigm development and evaluative criteria used by academic journal editors for judging scholarly work. The purpose of this study was to ascertain Speech Communication journal editors' opinions of paradigm development within their field.

A two-part survey was developed and mailed to eleven editors of the major Speech Communication journals. Data generated from the survey were analyzed using a descriptive methodology. Part …

The Combined Effect Of Cu And Zn On Selenastrum Capricornutum, Helmer Colonia-Roque

Dissertations and Theses

It has been demonstrated that the toxicity of heavy metals depends on their chemical speciation and can be related to their free ion activities, rather than the total metal concentrations. The objective of this study was to determine the effect of combined free ions of zinc and copper on the toxicity to the green alga Selenastrum capricornutum. This alga was grown in a defined medium, under controlled laboratory conditions, with a varying range of zinc and copper concentrations. The growth rate of the alga was inhibited at pZn = 5.93 or at pCu = 7.24. The results suggest that …

The Effects Of Various Chemical Treatments On The Surface Area Of Coals, Maria Margaret Ludvig

Dissertations and Theses

Surface areas of most American coals are small when measured by N₂ adsorption at 77 K and large when measured by CO₂ adsorption at 298 K, implying that the majority of the pores are less than 5 Å in diameter. This small pore size would restrict many gaseous and liquid reactants from entering the internal pore system of the coal, and hence, reduces the efficiency of coal conversion. Therefore, if the surface area, as measured by N₂ (77 K), could be increased, that is, to increase the pore size, the conversion of coal into useful products should …

Holocene Geologic History Of The Clatsop Plains Foredune Ridge Complex, David Karl Rankin

Dissertations and Theses

This research formulated a recent geologic history of the Clatsop Plains dating from 3500 years BP to present. Research consisted of geomorphic mapping, near-surface stratigraphic evaluation, carbon dating and subsurface interpretation of available data.

Formation And Zonation Of Ferruginous Bauxite Deposits Of The Chapman Quadrangle, Oregon, Richard Charles Marty

Dissertations and Theses

Two major theories have been advanced to account for the scattered distribution of ferruginous bauxite deposits. Original workers proposed that ferruginous bauxite originally developed over all exposed Columbia River Basalt in western Oregon and was subsequently removed by erosion. Studies which followed have suggested that it may be locally favorable conditions, especially of drainage, which are responsible for deposit distribution. Field mapping in the Chapman Quadrangle shows a possible correlation between a series of sheared zones, which may have improved drainage, and the distribution of ferruginous bauxite deposits. Examination of the pisolitic zone ferruginous bauxite of the Chapman Quadrangle failed …

Stratigraphic Relationships Of The Tillamook Volcanics And The Cowlitz Formation In The Upper Nehalem River-Wolf Creek Area, Northwestern Oregon, Michael Keith Jackson

Dissertations and Theses

The upper Nehalem River-Wolf Creek area is located on the northeastern flank of the Tillamook Highlands in the northern Oregon Coast Range. Three rock stratigraphic units underlie the thesis area, and these units range from late Eocene to Oligocene in age.

Teaching Visual Awareness To General Education Students, Larry Edward Gross

Dissertations and Theses

The goal of this thesis was to present a teaching method which would demonstrate increased visual awareness in general education college students. The particular approach presented for that purpose was also designed to be of potential benefit to students' total educational experience. To that end sane conditions and specific research were introduced as necessary considerations for the teaching approach and for the role of art education as it pertains to the thesis goal.

A Study Of The Diagenesis Of The Overburden Between The Badger And School Coal Seams, Dave Johnston Coal Field, Converse County, Wyoming, Rebecca K. Jaffer

Dissertations and Theses

Low pH zones in portions of the overburden at the Dave Johnston Coal Field, Converse County, Wyoming are the subject of this study. The low pH zones are restricted to limonite stained sandstones which grade downdip into normal pH gray sandstones. Changes in color, clay mineralogy, cementation and feldspar surface textures are noted between the two sandstone units. These changes appear to be the result of post depositional alteration that was responsible for oxidation of pyrite and chlorite, dissoluion of calcite, and the etching of feldspar grains. The parameters for the diagenesis fit those of uranium roll front models proposed …

Role Conflict And Role Ambiguity And Their Perceived Relationships To Substitute Teaching Effectiveness, Castilla Jack Ryan

Dissertations and Theses

This research is an exploratory study of role conflict and role ambiguity and their relationships to effectiveness in the substitute teaching services. In many public school systems, large numbers of substitute teachers are assigned to a classroom on a daily basis when the regular teacher is absent. The assignment is usually done through a central administrative office. Substitutes are assigned with very short notice; and since their assignment is based on availability, they may be asked to teach a subject outside their certified field. In addition, the lesson plans left for the substitutes by regular teachers may be incomplete or …

An Exploratory Functional-Structural Analysis Of American Urban Traditional And Alternative Secondary Public Schools, Mary Ellen Sweeney

Dissertations and Theses

This study investigates the way traditional and alternative secondary public school organizations are structured to impact youths. Some studies have found that traditional secondary schools utilize inappropriate and outdated organizational elements and arrangements. Alternative schools with different organizational arrangements have been initiated in public school districts to institute school reform measures. The three goals of this study are to: (1) collate a large share of the literature on the function, social context and organizational characteristics of conventional and alternative secondary public school organizations, (2) explicate a theoretical framework or interrelated set of propositions of organizational principles regarding modern organizations, including …

A Descriptive Predictive Model For The Employment Of Computer-Based Management Information Systems For The Government Of A Developing Country: Case, Iran, Hossein Bidgoli

Dissertations and Theses

This study was undertaken to identify the most decisive variables in the successful employment of a Computer-Based Management Information System (CBMIS) in a developing country such as Iran. A descriptive model was designed. Using a series of predictive models, several dimensions of successful CBMIS employment were investigated. Data were collected via a questionnaire sent to 79 Iranian governmental computer installations. Questions posed by the study are: (1) Under what conditions should a developing country continue to operate manually? (2) If computerization is feasible, what should the acquisition criteria be? (3) What are the most important variables for optimum utilization of …

A Computer Decision Support System To Assist In Providing Equality Of Educational Opportunity, Porter Sexton

Dissertations and Theses

This dissertation presented research by the author in the development of a computer Decision Support System (DSS) for assisting in providing equal educational opportunity in a public school district. The research process consisted of five major phases: (1) The support of a local school district was obtained, and, with the assistance of the superintendent, a task group of concerned administrators was assembled to assist in defining the needs and goals for the DSS. (2) A list of key variables was developed for inclusion in the support system. Data were gathered and stored for a preliminary version of the DSS. (3) …

The Placement Information Base: Its Utility And Meaning For Nursing Home Placement Decisions, Darlene Schroedl Mckenzie

Dissertations and Theses

The State of Oregon is using the Placement Information Base, PIB, as part of an assessment process to determine the type of placement needed by Medicaid clients. While used for functional assessment, PIB has not been empirically studied for its use as a screening or predictive instrument to differentiate between the need for nursing home care and community care. This dissertation addresses the question of whether PIB is suitable for use as a screening instrument for nursing home placement decisions. Both PIB's measurement and predictive capabilities are examined. Using secondary PIB data on 2287 elderly Department of Human Resources clients, …

Stopping Power Of K Electrons At Extreme Relativistic Energies, P.T. Leung, M. L. Rustgi

Physics Faculty Publications and Presentations

The recent work of Anholt (1979) on K-vacancy production by relativistic projectiles has been applied to calculate the stopping power of the K electrons. The results show that for protons of energy ~10³ GeV and heavy target elements, the relativistic contributions to the stopping power amount to several times the results due to the longitudinal terms obtained from Walske's (1956) work.

Faculty Senate Monthly Packet January 1983, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The January 1983 Monthly packet includes the January agenda and appendices and the Faculty Senate minutes and attachments from the meeting held December 1982.

A Study Of Single Angle Compression Members, James Robert Callaway

Dissertations and Theses

A study was undertaken to investigate the compressive capacity of a specific group of single angle members.

A review of existing literature and techniques was presented. Laboratory compression tests were performed on 22 angle members of four different sizes and two different lengths. Additional tests were performed to determine the yield strength of the material. The results, normalized with respect to the yield stress, were tabulated and discussed.

Two existing analytic models were used to attempt to predict the ultimate capacity of the test members. The first, an elastic method, was based upon the AISC combined stress equation. The second, …

Psychometric Properties Of The Group Process Questionnaire, Lucia Igou Eakins

Dissertations and Theses

The Group Process Questionnaire (GPQ), a 55-item rating scale, was developed by Richard Wollert in 1981 to assess perceptions of the frequency of processes occurring in self-help groups (SHGs). The GPQ was first employed by Wollert, Eakins, and Dixon (Note 1) as the primary data collection instrument in an ongoing investigation of urban SHGs. This investigation is one of a small number of empirical studies which have attempted to specify the range of SHG activities. Due to the relatively recent emergence of SHGs as topics of research, and the unique obstacles to research presented by the independent character of these …

The Geology Of The Floras Creek Area, Curry County, Oregon, Jon Dudley Bounds

Dissertations and Theses

The Floras Creek area, east of the town of Langlois, near the southwest Oregon coast, includes Colebrooke Schist (a klippe of metamorphosed pelitic sediments of Jurassic age), Jurassic Otter Point Formation (a melange complex), and lower the middle Eocene Roseburg and Lookingglass Formations, part of a sandstone-shale sequence occurring more extensively in other areas. The Colebrooke Schist occurs in the south-central part of the area, bounded on the Otter Point and Roseburg. The Lookingglass is exposed as a small (1.5 sq. km) block in the north-north-west part of the area. Two major structural trends are found in the Floras Creek …

A Geophysical Study Of The North Scappoose Creek, Alder Creek, Clatskanie River Lineament, Along The Trend Of The Portland Hills Fault, Columbia County, Oregon, Nina Haas

Dissertations and Theses

The Portland Hills fault forms a strong northwest trending lineament along the east side of the Tualatin Mountains. An en echelon lineament follows North Scappoose Creek, Alder Creek, and the Clatskanie River along the same trend, through Columbia County, Oregon. The possibility that this lineament follows a fault or fault zone was investigated in this study. Geophysical methods were used, with seismic refraction, magnetic and gravity lines run perpendicular to the lineament. The seismic refraction models indicate the near surface basalt is broken in many places, with 15 - 30 meters (50 - 100 feet) vertical displacement, down to the …