Digital Commons Network^™

Constructing The 1990 Public Transportation Study Process: Reflections Of The 1988 Research Team, Janice Dean, Sheldon Edner

Center for Urban Studies Publications and Reports

The 1988 Oregon Public Transportation Study provided a solid foundation of information about Oregon’s transportation providers. In particular, it furnishes information on which revenue sources members of the industry are utilizing, expenditure patterns, capital and operating revenue needs, the protected increased demands for public transportation, and the ability of provides to makes use of available resources in their strategic planning. The study also substantiated that many members of the industry do not identify themselves as transportation providers, particularly the Special Need Transportation providers. The research process also revealed several additional factors about the process of collecting information that should be …

A Comparative Study Of The Performance Of Various Image Analysis Methods For Dimensional Inspection With Vision Systems, Ralf Heinrich Koeppe

Dissertations and Theses

Dimensional inspection with Vision Systems requires a careful selection of image analysis methods in order to obtain accurate information about the geometry of the parts to be measured.

The purpose of this project is to study, implement and compare different image evaluation methods and to show their strengths and weaknesses with respect to dimensional inspection. Emphasis is made on the inspection of circular features. The criteria of comparison for these methods are discussed. Using synthetically generated images, various analysis methods are compared and conclusions for their use are drawn. Results of the comparison show that the selection of a method …

Meeting Notes 1989-07-13 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

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

Portland State Magazine

PSU’s alumni magazine, published quarterly. In this issue: PSU’s Environmental Sciences and Resources program addresses problems of our ever-changing planet; a student travels to Japan in an unprecedented business exchange; questions outnumber answers in the complex world of child custody; and more.

Invariant Pattern Recognition Algorithm Using The Hough Transform, Duwang Li

Dissertations and Theses

A new algorithm is proposed which uses the Hough Transform to recognize two dimensional objects independent of their orientations, sizes and locations. The binary image of an object is represented by a set of straight lines. Features of the straight lines, namely the lengths and the angles of their normals, their lengths and the end point positions are extracted using the Hough Transform. A data structure for the extracted lines is constructed so that it is efficient to match the features of the lines of one object to those of another object, and determine if one object is a rotated …

Integrating Psychological And Economic Perspectives On Energy Consumption: The Determinants Of Thermostat Setting Behavior, Jane Stromme Peters

Dissertations and Theses

Data obtained from two surveys of 283 residents of recently built homes in the Pacific Northwest were used to examine winter thermostat setting behavior. Attitude scales along with demographic, economic and dwelling structure data were used to estimate models of daytime, nighttime and average temperature setting choices. Two series of models were estimated: a partial model using demographic, dwelling structure characteristics and economic data; and an integrated model including the attitude scales.

The results of these analyses demonstrated that the inclusion of data on respondent attitudes toward comfort, conservation, health and cost control significantly improved the explanatory power of the …

Theory Of A Synchronously Pumped Mode-Locked Dye Laser In The Short Pump Pulse Limit, Duncan Leo Macfarlane, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

We study the operation of a synchronously pumped mode-locked dye laser when the pump pulse is taken as a Dirac delta function, a limit that is sometimes experimentally reasonable. We find that in this limit the model simplifies considerably and that with further assumptions the physical interpretation of synchronously pumped mode-locked operation becomes apparent. Specifically, our nonlinear dynamical model reduces to the same set of equations that govern a prepumped Q-switched laser, and from this simple picture we are able to derive approximate analytic formulas for the synchronously pumped mode-locked laser pulse width and peak intensity. Additionally, we present a …

Dynamics Of The Suburban Activity Center, Rodney Jennings

Center for Urban Studies Publications and Reports

Suburban congestion is a much-discussed phenomenon, although its nature and dimensions are poorly understood. During the Winter term of 1989, several students in the Transportation and Land Use class in the Department of Urban Studies and Planning, Portland State University, examined in term papers transportation issues related to suburban activity centers, particularly the Washington Square center area of suburban Portland.

This report is a synthesis of work derived from the student's term papers. Four of the students continued their research in a collaborative way and presented their joint finding at a workshop at the University of Washington sponsored by TransNOW, …

Meeting Notes 1989-05-11 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Taylor Instability In Ryholite Lava Flows, B. A. Baum, W. B. Krantz, Jonathan H. Fink, R. E. Dickinson

Geology Faculty Publications and Presentations

A refined Taylor instability model is developed to describe the surface morphology of rhyolite lava flows. The effect of the downslope flow of the lava on the structures resulting from the Taylor instability mechanism is considered. Squire's (1933) transformation is developed for this flow in order to extend the results to three-dimensional modes. This permits assessing why ridges thought to arise from the Taylor instability mechanism are preferentially oriented transverse to the direction of lava flow. Measured diapir and ridge spacings for the Little and Big Glass Mountain rhyolite flows in northern California are used in conjunction with the model …

The Application Of The Ordered List Method And The Dynamic Programming To The Unit Commitment, Hoang Uong

Dissertations and Theses

The thesis presents a method of committing generating units in a hydro-thermal power system within practical computer resources such as computer time and data storage.

Faculty Senate Monthly Packet May 1989, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The May 1989 Monthly packet includes the May agenda and appendices and the Faculty Senate minutes and attachments from the meeting held April 1989.

Direct Current-Excited Cw Co² Metal Waveguide Laser, Fahad S. Al-Mashaabi, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

A novel design for a dc-excited cw CO₂ metal waveguide laser has been developed in which a slotted hollow cathode also doubles as a metal waveguide for the cavity modes. This design has been implemented in a compact structure that produces over 1 W of cw 10.6-µm radiation. The discharge characteristics, laser gain, and laser output have been studied as functions of various discharge parameters. The advantages of the transverse discharge of the slotted hollow cathode geometry include low voltage, positive impedance, rugged structure, and high optical gain. Overall efficiency is comparable with that of conventional longitudinal CO² lasers. The …

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

Portland State Magazine

PSU’s alumni magazine, published quarterly. In this issue: New decisions in Portland’s higher education scene could lead to significant changes for the University; engineers and scientists are learning management insight and skills in a new master’s program; a PSU conference brings distinguished Soviet and Chinese scholars together to discuss their countries’ historic reform movements; retiring Professor Charlie White will be fondly remembered by students, colleagues and international scholars; and more.

Meeting Notes 1989-04-13 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

A Finite State Machine Synthesizer, Jiuling Liu

Dissertations and Theses

This thesis presents a Finite State Machine (FSM) Synthesizer developed at Portland State University. The synthesizer starts from a high level behavioral description, in which no states are specified, and generates the lower level FSM descriptions for simulation and physical layout generation.

Pump Pulse Effects In Synchronously Pumped Mode-Locked Dye Lasers, Duncan Leo Macfarlane, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

We consider the role of the pump pulse in the output of a synchronously pumped mode-locked dye laser. Our theoretical formalism is a nonlinear dynamical model that includes semiclassical effects, dipole orientation, and intrband relaxation. In particular, we study the shortenting of the output pulse with decreasing pump pulse length and increasing pump level. Both of these predictions agree with experiments.

Spontaneous Coherent Pulsations In Standing-Wave Laser Oscillators: Frequency Characteristics, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

The output signal from a spontaneously pulsing laser must, by definition, consist of more than one frequency component. The experimental and theoretical study of the frequency components'associated with such a laser can provide valuable insights into the pulsation processes. The results of an investigation into the frequency characteristics of a spontaneously pulsing standing-wave laser are reported.

Application Of Hough Transformation To Detect Ovulatory Patterns In Cervical Mucus Images, Shiliang Wang

Dissertations and Theses

A microcomputer system called ovulocomputer is proposed. The system is used to predict and detect ovulation of women. It will use image processing and analysis, pattern recognition theory, spectrophotometry, ionometry and conductometry to measure various physical and chemical properties of cervical mucus that are related to blood hormone levels.

The functions and characteristics of cervical mucus are introduced in this thesis. Among them, the identification of cervical mucus images, named the ferning test, and related features, are well described.

A new idea, called ferning test automation, which has been neither proposed nor developed before, is presented and explained in detail …

Meeting Notes 1989-02-09 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Structure And Dynamics Of Household Hazardous Wastes, Douglas C. Wilson, William L. Rathje

Anthropology Faculty Publications and Presentations

Municipal Solid wastes--the majority of which are household refuse--have, increasingly been implicated as a source of hazardous materials in landfill leachate discharges (U.S. EPA 1988). Data collected on the components of these wastes are critical for solid wastes systems planning--especially landfill design, hazardous materials collection systems, and resource recovery. A number of recent studies by the University of Arizona's Garbage Project have identified household products as a possible source of hazardous materials in landfills (Wilson 1985, Rathje et al. 1987a, 1987b). Studies have addressed (1) the definition of these "household hazardous wastes" (HHW), (2) the characteristics of HHW from hands-on …

Meeting Notes 1989-01-12 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Urban Service Delivery System And Federal Government Bureaucracy: A Structural Analysis Of Spatial Distribution Of Water Supply In A Suburban Community Of Metropolitan Lagos, Michael Udochukwu Mbanaso

Dissertations and Theses

This study identifies the prevailing scarcity of urban public services and the conceptual relations among service delivery, patronage, bureaucratic activities and structural factors in the Lagos Metropolitan region. It examines the extent to which clientelism, bureaucratic decision rules and structural theoretical models explain water service delivery patterns in Festival Town (Festac), a suburb of Lagos, Nigeria.

The unprecedented pace of growth of the Lagos Metropolis since the mid-twentieth century gave rise to the spectacular spatial expansion of the continuous built up region. Urban industrial and governmental institutions have not kept pace with the population growth rate of Lagos. This demographic …

The Use Of Efficient Information Systems For Information Acquisition By The Hearing Impaired: A Case Study, William L. Nicolay

Dissertations and Theses

This paper presents an exploratory case study focusing on the acquisition of information, through technologically efficient systems, by the hearing impaired. The multiple-case study was conducted during one school year with seven students participating.

While a central question and propositions derived from that question guide the data collection and analysis, this is a hypothesis-building study. The purpose of the study was to generate questions to focus further research of a descriptive or explanatory format.

One question, and the propositions generated by it, dominated this research: How do efficient acquisition systems in the classroom effect academic and social behavior, independent activities, …

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 …

The Formation And Expansion Of High Technology Firms In Metropolitan Areas, Oliver Ikeotuonye Orjiako

Dissertations and Theses

The theme of high-technology economic base and regional development, around which this research is based, has been receiving increased attention from policy-makers and researchers in recent years. This partly reflects the reappraisal of the emerging structural changes which have been stimulated by the negative effects of the economic recessions of the past decade. It also reflects the rapid growth and expansion of high-technology firms in centers like the well-publicized Silicon Valley in California, Route 128 in Massachusetts, and the Research Triangle in North Carolina. Promoting a high-technology economic base thus has been widely adopted as a regional development policy for …

Self-Concept Competency Of National Aeronautics And Space Administration Research And Development Managers, Mark A. Beymer

Dissertations and Theses

Boyatzis has stated that "true" management competencies are characteristics of a manager which differentiate superior from average and below average performance. Boyatzis, however, treats a manager's self-image (self-concept) as a "threshold" rather than a "real" competency. Lafferty's research, which has measured relationships between several lifestyle (self-concept) variables and corresponding organizational behavior, has found that performance differences between average and high performing managers are associated with differences in self-concept construction. The researcher proposes to treat variations in self-concept measurements from managers as indications of their relative management competency. Thisresearch investigates seventeen hypotheses relating to the self-concepts of high performing, mid-level technical …

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.

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 …

A New Approach To State Minimization Of Finite State Machines, William Yue Zhao

Dissertations and Theses

A complete program to ease the task of large scale Finite State Machine (FSM) minimization presented in this thesis: TDFM (Two Dimensional FSM Minimizer), is a part of the DIADES system. DIADES is an Automatic Design Synthesis System whose development in the Department of Electrical Engineering at Portland State University is supported in part by a research grant from SHARP Microelectronics Technology.