Digital Commons Network^™

"Nuclear Power: Its Role In Our Future", Betsy Macinness, Dave Ferg, Rudi Nussbaum, Tom Davis, Sandra Kiefer

Special Collections: Oregon Public Speakers

No abstract provided.

Geology Of The Breitenbush Hot Springs Area, Cascade Range, Oregon, Clifford Michael Clayton

Dissertations and Theses

The Breitenbush Hot Springs area lies on the boundary of folded middle to late Tertiary Western Cascade rocks and younger High Cascade rocks. Within the mapped area the Western Cascade rocks are represented by four formations. The Detroit Beds, a sequence of interstratified tuffaceous sandstone, mudflow breccia, and tuff, is overlain unconformably by the Breitenbush Tuff. The Breitenbush Tuff consists of three units of welded pumice-rich crystal-vitric ash-flow tuffs interbedded with tuffaceous sedimentary rocks. The Outerson Formation unconformably overlies the Breitenbush Tuff and consists primarily of basaltic lava and breccia.

The Outerson Formation includes three localized members: a basal, glassy, …

A Test Of Conservation For Continuous And Discontinuous Quantity In The Very Young Child, Nancy Patrick Kaye

Dissertations and Theses

The development of mathematical concepts in children has been studied by many researchers. Much of this research has focused on the concept of conservation which was introduced by Piaget. It has generally been assumed that children under the age of five years are not capable of such conservation. Some recent evidence suggests that children Wlder this age do conserve on particular tasks. In this study one hundred children from age two years four months to three years seven months were tested for conservation of discontinuous and continuous quantity. Although some evidence of conservation in this age range was obtained, no …

"Biological Determinism As A Social Weapon", Richard C. Lewontin

Special Collections: Oregon Public Speakers

No abstract provided.

Viking 1976, Portland State University

The Viking (Yearbooks)

Portland State University 1976 yearbook

Polymerization Of Amino Acids On Kaolinite, Z. Badri Adnani-Gleason

Dissertations and Theses

In the origin of life on the primitive earth a major step must have involved the condensation of amino acids to form the first polypeptides. Several suggestions as to how this might have occurred have been made by other workers. One of the more appealing proposals is that the polymerization was catalyzed by clay minerals. It has been reported, for example, that L-apartic acid polymerizes significantly faster than D-aspartic in the presence of kaolinite in aqueous suspension at 90˚. In this work an attempt was made to repeat this report and extend the pH range to include values presumably present …

Theoretical Studies In Cooperative Phenomena And Population Ecology, Shripad Tuljapurkar

Dissertations and Theses

We study problems in the stability of nonlinear ecological models and in the theory of collective motion in physical systems. We first establish criteria for global stability in deterministic nonlinear population models, including the most general criteria so far available for the Lotka-Volterra model. Next we study conditions for coexistence under periodic perturbations in population models and establish criteria for the appearance of dynamic equilibrium states. The third study in ecological stability establishes that a measure of the stability of population models in the presence of white noise is given by a Liapunov function for the nonlinear deterministic model, and …

Qsim2: A Low-Budget Heuristic Approach To Modeling And Forecasting, Wayne Wakeland

Complex Systems Faculty Publications and Presentations

This paper contains a description of a simple mathematical framework and modeling process which can be used to study a large class of socio-techno-natural systems. Models may be designed using intuitive notions or data to help specify the variables, parameters and interrelationships, which, with the aid of a computer program, can be used to forecast system behavior under various assumptions. Two example models are described.

Threshold Characteristics Of Multimode Laser Oscillators, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

The oscillation characteristics of a multimode laser are considered in detail, and for the first time saturation by all of the cavity modes is included. Analytical expressions are obtained for the mode amplitudes, linewidths, and over‐all spectral characteristics of lasers operating above and below threshold. It is found that with increasing excitation the spontaneous emission spectrum is gradually resolved into a set of narrow discrete modes. Slightly above threshold the number of modes reduces in a homogeneoulsy broadened laser until only a single mode is oscillating strongly. The theoretical results are in agreement with experimental data that have been reported …

Rain: Appropriate Technology, Recycling, Video, Community, Energy, Wind, Solar, Land Use, Energy Conserving Lifestyles, Eco-Net

RAIN: Journal of Appropriate Technology

Volume 2, Number 3

Inside: Wood Heat Stove Buyers Guide; Thinking About Land E. F. Schumacher; Solar Water Heater Plans

RAIN began in October 1974 as a publication of ECO-NET, an environmental education network funded by the Hill Foundation and an Environmental Education grant. Its office was based in the Environmental Education Center at Portland State University. With a focus on the Pacific Northwest, particularly Oregon, RAIN originally described itself as a “bulletin board” with an “emphasis on environmental/energy related and communications kinds of information” and interested in “the evolutionary possibilities of inter-disciplinary connections.”

Mode Properties Of Annular Gain Lasers, Lee W. Casperson, Mohammad Shabbir Shekhani

Electrical and Computer Engineering Faculty Publications and Presentations

The properties of a new class of laser resonators are investigated theoretically and experimentally. In these lasers the radiation propagates longitudinally in an annular amplifying medium, and useful low loss modes can be obtained even when the axial region is obscured. Alignment characteristics and far field patterns are discussed, and experiments have been conducted using coaxial double-discharge CO₂ devices.

"The Search For Extra-Terrestrial Life", Donald L. Devincenzi

Special Collections: Oregon Public Speakers

No abstract provided.

Rain: A Monthly Bulletin Board, Eco-Net

RAIN: Journal of Appropriate Technology

Volume 2, Number 1

Inside: Ecotopia by Ernest Callenbach; Conscious Culture of Poverty by E. F. Schumacher

RAIN began in October 1974 as a publication of ECO-NET, an environmental education network funded by the Hill Foundation and an Environmental Education grant. Its office was based in the Environmental Education Center at Portland State University. With a focus on the Pacific Northwest, particularly Oregon, RAIN originally described itself as a “bulletin board” with an “emphasis on environmental/energy related and communications kinds of information” and interested in “the evolutionary possibilities of inter-disciplinary connections.”

The Effects Of An Innovative Curriculum On The Attitudes Of "Educationally Disadvantaged" Freshman College Students, Julius William Wilkerson

Dissertations and Theses

Educational research literature suggests the expectations for success in college for youth from "educationally disadvantaged" backgrounds are tragically small. Reasons offered for this have included the lack of requisite academic preparation, lack of motivation, lack of appreciation for the value of a college education. The general purpose of this study was to investigate the effectiveness of an innovative instructional technique in promoting the development of positive attitudes about self-worth, and academic achievement, for "disadvantaged" students. Specifically, this study attempted to identify the structure of attitudes of "educationally disadvantaged" students in the Portland State University support service program (Operation PLUS) about …

Isolation And Characterization Of Two Sterols From The Green Alga, Selenastrum Capricornutum, Raymond Mark Owings

Dissertations and Theses

The green alga, Selenastrum capricornutum, was cultured in artificial nutrient medium utilizing five-gallon carboys, each of which contained 16 1. of culture. The algal cells were separated from the nutrient medium by continuous-flow centrifugation at 7500 RPM, and were then lyophilized. The lyophilized cells were extracted by refluxing with ether, acetone, and chloroform:methanol (2:1). Free sterols and sterol esters were separated from the crude extract using preparative thin-layer chromatography. Sterol esters were saponified and both the sterols and the fatty acids were recovered.

Individual sterols were separated from the free sterol fraction using argentation thin-layer chromatography. Gas chromatograms, mass …

Construction And Implementation Of An Individualized Math Program For Sixth Graders, Lynda Sylvia Hatch

Dissertations and Theses

The sixth grade teachers at Mooberry School in Hillsboro, Oregon were not pleased with the way they were teaching math. The students, grouped by ability, had a poor self-concept about math and felt "locked into" one class.

During the summer of 1973, these teachers considered ways to change their math instruction. Reading was done to determine the most promising practice in math education in the United States. A successful approach to learning appeared to be individualized instruction, as is discussed in this paper. Many different individualized programs were studied, grouped into eleven general categories, and described in detail. The Mooberry …

Course Demands Of Students In Teacher Education At Portland State University As Demonstrated By An Induced Course Load Matrix, Elinore Janet Rogers

Dissertations and Theses

The purpose of this study was to examine the interrelationships between the School of Education and the rest of the university by means of the course demands placed by elementary education majors and graduate education students on other academic departments during the fall terms of 1972 and 1973. It also examined the course demands placed on the School of Education by other major groups for this period. The Induced Course Load Matrix (ICLM) was the vehicle used in this examination. The hypothesis tested were 1) that elementary education majors and graduate education students placed equal course demands on the other …

"Kubla Khan" And Its Critics, Allen Dale Widerburg

Dissertations and Theses

This paper evaluates the critical response to Samuel Coleridge's "Kubla Khan." In the Introduction I outline my critical approach, which attempts to see the relationships between parts of the poem, sources outside the poem and poet himself. In analyzing Coleridge's esthetics, I have come to the conclusion that the poem was the first of a new type of Romantic poem. The central structural principle of this type of poem is the use of illusion and the fragmented form, or the illusion of the fragmented form. Poems that fall within this esthetic frequently use the "vision within a dream" motif as …

Computer Aided Design For Fluidic Sequential Circuits Of Fundamental Mode, Yau-Hwang Lee

Dissertations and Theses

This thesis presents the method of state diagram synthesis and the development of a computer program for designing fluidic sequential feedback control circuits of the fundamental mode. A paper on state diagram synthesis was authored by Chen and Lee, presented in Detroit and published as ASME paper 73-WA/Flcs-2 in 1973.

Hypothetical systems are illustrated by using series of events characterized by the piston positions of some double-acting pneumatic cylinders. In these systems , an action can only begin when the previous action has been completed. Every extension or retraction of a piston is memorized and manifested by a flip-flop element …

The Dynamics Of An Hcp Crystal With A Substitutional Defect, Pramod C. Karulkar

Dissertations and Theses

We examine the problem of the dynamics of a hexagonal close packed crystal with a single substitutional impurity. The effects of the mass and the force constant changes due to the introduction of the impurity atom are taken into account assuming nearest neighbor interactions under the harmonic approximation. Using Green’s function and group theoretical methods, the equations of motion for the perturbed normal modes are obtained in an exact form. The calculations are performed by allowing for very general force constant changes which can have noncentral as well as central contributions. Further, by assuming central forces, we simplify the equations …

Alternative Methods For The Analysis Of Curves, Randi Christine Martin

Dissertations and Theses

The interpretation of data from psychological experiments often involves the analysis and comparison of curves, like the electrocardiogram, spectral sensitivity, or dose-response curves. Existing statistical techniques are often inadequate for making this type of analysis. This thesis presents alternative methods for handling the data comprising curves and discusses the advantages of these techniques against those of existing methods.

Four types of analysis are discussed:

1. finding a confidence band around one curve,
2. finding a confidence band around the difference between two curves, or making an overall comparison between two curves,
3. decomposing a curve into its components,
4. making a component by component …

Private Pensions And The Free Market, John Louis Dobra

Dissertations and Theses

In light of the retirement phenomena, the development and utilization of private pensions may be viewed as a market response based on individual and collective recognition of the need to plan to finance retirement from the labor force. This market response however, is shown to have produced a profusion of independent differential pension schemes which may vary with respect to their administrative mechanisms, the type and adequacy of benefits paid, the level at which contributions are made to the plan by participants and the basis of these contributions, and the adequacy of funding. As a result, it is not only …

A Survey And Critical Analysis Of Current Literature On The Post Audit Of Capital Expenditure, Gene Albert Katke

Dissertations and Theses

Several writers in the field of capital budgeting have charged that present day literature on the subject fails to adequately address the post audit phase of capital expenditure programs. This study is essentially a survey of current literature designed to determine the validity of this charge. To accomplish this task, the study compares each author’s published views on selected post audit factors with other responses from the literature and analyzes collective agreements and differences. Armed with this information, an attempt is made to provide answers to three pertinent questions:

l. Does general agreement exist among writers on what constitutes the …

The Effect Of Human Activity On The Middle Course Of The Tualatin River, Oregon, Lolita M. Carter

Dissertations and Theses

A diurnal study of biological, chemical, and physical parameters was made on the middle course of the, Tualatin River, which drains a 1840 km² (711 mi²) basin adjacent to metropolitan Portland, Oregon. This portion of the river lies along land in transition of use from rural agriculture to highly urbanized development.

There is no nutrient loading of the river from farming practices because there was no return of water from summer, sprinkler irrigation of commercial crops. However, irrigation significantly reduces the volume of water in the river in the summers.

Effluents from sewage treatment plants flowing into …

Implications Of American Missionary Presence In 19th And 20th Century Iran, Linda Colleen Karimi

Dissertations and Theses

American missionaries to Iran exerted little influence in the area of religion, rather their impact was in education and medicine. Two decisive factors involved in their success were the awakening of Iran to the advances of Western technology and the limited scope of indigenous opportunities in the fields of learning and medicine. Their work in Iran was, however, hampered by opposition from those elements wishing to retain the status quo. In spite of such reactions, they were able to maintain their positions in Iran for approximately one hundred years. It was the advent of the Pahlavi dynasty which initially limited …

Rain, Eco-Net

RAIN: Journal of Appropriate Technology

Volume 1, Number 8

RAIN began in October 1974 as a publication of ECO-NET, an environmental education network funded by the Hill Foundation and an Environmental Education grant. Its office was based in the Environmental Education Center at Portland State University. With a focus on the Pacific Northwest, particularly Oregon, RAIN originally described itself as a “bulletin board” with an “emphasis on environmental/energy related and communications kinds of information” and interested in “the evolutionary possibilities of inter-disciplinary connections.”

Studies In Transition Metal Chemistry, Steven David Brown

Dissertations and Theses

The electronic and vibrational spectra of liquid chromium pentafluoride have been investigated. They were found to be consistent with a d¹ system that is extensively fluorine-bridged at room temperature. The vibrational spectra were not consistent with C_4v or D_3h monomers.

Gaussian Modes In High Loss Laser Resonators, Lee W. Casperson, Susan D. Lunnam

Electrical and Computer Engineering Faculty Publications and Presentations

Matrix techniques are applied to the mode analysis of laser resonators having spherical mirrors and Gaussian profiles of the mirror reflectivity. These same analytical methods provide a useful approximation to the mode and loss characteristics of conventional resonators having an abrupt discontinuity of the reflectivity. Mode selection in apertured waveguides and resonators is also discussed.

Electromagnetic Modes Of An Inhomogeneous Sphere, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

Vector wave solutions are derived for the electromagnetic modes of a sphere having radial variations of the refractive index and gain. For some inhomogeneity models, confined-mode solutions exist. The results are applicable to the refracting atmospheres of stars and planets.

"Large Systems", Richard Ernest Bellman

Special Collections: Oregon Public Speakers

No abstract provided.