Digital Commons Network^™

Meeting Notes 1990-01-18 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Faculty Senate Proceedings 1990-1991, Portland State University Faculty Senate

Faculty Senate Monthly Packets

Faculty Senate Proceedings from meetings held 1990-1991. This item contains Ex-officio Members, Chronological Index of Senate Minutes, Reports and Documents and a subject index for the Faculty Senate meetings between these dates. Some issues accompanied by reports from officers of administration and faculty committees.

Meeting Agenda October 1990 - June 1995, Portland State University Faculty Senate

Faculty Senate Meeting Agenda Compilations (Five Year)

Meeting agendas of the Faculty Senate for October 1990 to June 1995.

Annual Faculty Senate Minutes October 1990 - June 1991, Portland State University Faculty Senate

Annual Compilations of the Faculty Senate Minutes (Minutes Only)

Minutes of the Faculty Senate for October 1990 to June 1991.

Terrain Disturbances By Winter Roads In The Lower And Central Mackenzie River Valley, N.W.T., Canada, Christoph Gnieser

Dissertations and Theses

Winter roads, built from compacted snow and I or ice, are common throughout the circumpolar North. They are considered effective and economical means of providing seasonal access into permafrost terrain while minimizing the potential for environmental damage.

The purpose of this study is an appraisal of long-term environmental impacts of winter roads by comparative assessment of terrain morphology, microclimate, permafrost, soils, and vegetation, on winter road right-of-ways and in adjacent undisturbed control areas.

Threaded Octree Structures For Fast Neighbor Voxel Processing In A Parallel Ray Tracer, B.R. Naveen Chandra

Dissertations and Theses

In the field of Computer Graphics, Ray Tracing has so far been the the best algorithm for rendering of realistic three dimensional images created by mathematical models. Ray Tracing is also known for its very large computation times, where the computation depends on the picture resolution, the number of objects and the complexity of the scene.

Optimization And Thermodynamic Performance Measures Of A Class Of Finite Time Thermodynamic Cycles, Joseph D. Walters

Dissertations and Theses

Modifications to the quasistatic Carnot cycle are developed in order to formulate improved theoretical bounds on the thermal efficiency of certain refrigeration cycles that produce finite cooling power. The modified refrigeration cycle is based on the idealized endoreversible finite time cycle. Two of the four cycle branches are reversible adiabats, and the other two are the high and low temperature branches along which finite heat fluxes couple the refrigeration cycle with external heat reservoirs.

This finite time model has been used to obtain the following results: First, the performance of a finite time Carnot refrigeration cycle (FTCRC) is examined. In …

The Knowledge Systems Transfer Project: A Multiple Perspective Investigation Into The Integration Of A New Technology Within A Business Unit, Steven Craig Tarr

Dissertations and Theses

Many organizations have been attempting to build a conceptual framework for managing technology, with varying degrees of success. Most begin by consulting leading technology authorities, borrowing elements of their thinking, and adapting these elements to their organizational and personal situations. This dissertation extends this process by using the formal research methodology of multiple perspectives (technical, organizational, personal, and cross-cuing) to build a case-based model of the technology integration process. The research and the model construction benefits from a solid foundation established through a review of technology management and knowledge systems literature. The significant aspects of the research are tied to …

Portland City At A Crossroads: Portland Civic Index Project, Portland (Or.). City Planning Commission

Portland Regional Planning History

Beginning in June, 1989 and continuing through May, 1990, a group of citizens from the Portland Metropolitan area met to study the future of the community through the Civic Index process established by the National Civic League. This report represents the results of this effort.

Residual Circulation In Shallow Estuaries 2. Weakly Stratified And Partially Mixed, Narrow Estuaries, David A. Jay, J. Dungan Smith

Civil and Environmental Engineering Faculty Publications and Presentations

Long-wave theory is used herein to analyze circulation in weakly stratified and partially mixed estuaries. Unlike the highly stratified systems considered in part 1, the flows considered here have only a minimal tidal-frequency internal wave component. These estuaries may therefore be modeled as the sum of weakly interacting barotropic and baroclinic modes. The dominant factors driving the residual flow are finite amplitude barotropic effects in weakly stratified estuaries and a combination of barotropic effects and steady horizontal density gradient forcing in partially mixed estuaries. The dominant vertical exchange mechanism in the weakly stratified case is bottom boundary-induced turbulence, and that …

Self-Consistent Effective Binary Diffusion In Multicomponent Gas Mixtures, John D. Ramshaw

Physics Faculty Publications and Presentations

The correct treatment of diffusion in multicomponent gas mixtures requires solution of a linear system of equations for the diffusive mass fluxes relative to the mass-averaged velocity of the mixture. Effective binary diffusion approximations are often used to avoid solving this system. These approximations are generally internally inconsistent in the sense that the approximate diffusion fluxes do not properly sum to zero. The origin of this inconsistency is identified, and a general procedure for removing it is presented. This procedure applies equally to concentration, forced, pressure, and thermal diffusion, either separately or in combination. It is used to obtain a …

Analysis And Numerical Simulation Of The Ground Water System At The Bonneville Navigation Lock Site, Oregon, Dirk Baron

Dissertations and Theses

As part of the new navigation lock for Bonneville Dam a new water source for the Bonneville Fish Hatchery must be supplied. The hatchery is located on the Oregon side of the Columbia River downstream of the dam. It requires large quantities of water free from chemical and biological contamination. In addition, the water has to be in a narrow temperature range. Currently the fish hatchery receives its water from a well field that is located on the alluvial terrace downstream of Bonneville Dam. The well field lies in the proposed approach channel for the new lock and has to …

Metamodeling Aspects Of Model Conceptualization, Wayne W. Wakeland

Complex Systems Faculty Publications and Presentations

This paper suggests a technique for improving the conceptualization of models. The key aspect of this technique is to set aside the main model for a period of time during the model conceptualization process and focus on building a "watchdog" submodel. The primary purpose of the watchdog submodel is to assure that the main model remains internally consistent during its operation. In the experience of this author, such a submodel can help to identify model conceptualization errors and to determine if a model is sufficiently "robust" to adequately replicate the behavior of the system being modeled.

This is not a …

Residual Circulation In Shallow Estuaries 1. Highly Stratified, Narrow Estuaries, David A. Jay, J. Dungan Smith

Civil and Environmental Engineering Faculty Publications and Presentations

Long-wave theory and simple turbulence closures have been used to show that three distinct types of circulation (highly stratified, weakly stratified, and partially mixed) arise in narrow, shallow estuaries from the finite amplitude of the tide and the interaction of stratification with vertical mixing. Each type has a different dominant process causing the vertical exchange of salt and fresh water on the flood, and each gives rise to a characteristic residual circulation. The tidal circulation in highly stratified shallow estuaries, described herein, is the result of a finite amplitude internal motion driven by the barotropic tide; shear instabilities at the …

Benchmarking Parallel Machines Via A Software Architecture, Srikanth Kambhatla, Jon Inouye, Jonathan Walpole

Computer Science Faculty Publications and Presentations

The diversity in parallel architectures and the programming styles induced thereof, make benchmarking of parallel machines a hard problem. Current benchmarking techniques are limited in applicability due to the issues of portability. We present a different approach to benchmarking parallel machines, which would make the resulting benchmarks portable, easy to use and widely applicable. The approach involves the use of a software architecture to mask the diversities of the underlying architectures. The benchmarks are based on the Linda Tuple Space, and is called BeLinda. In this report, we motivate the use of a software architecture, give a specification of the …

Job Satisfaction Of Classified Employees In A Public Suburban School District, Jeradean Emma Rehm Masciocchi

Dissertations and Theses

This study examined the sources of job satisfaction and dissatisfaction for classified employees in a large public suburban school district. The population included randomly-selected bus drivers, custodians, school and non-school secretarial employees, instructional assistants, maintenance workers, food service personnel and technical employees. Three research questions were posed: (a) What are the primary sources of job satisfaction and dissatisfaction for classified employees? (b) Is there a significant difference in job satisfaction among the specific categories of classified employees? (c) Are demographic/personal variables of classified employees related to overall job satisfaction? The study incorporated both qualitative and quantitative methodology. Focus groups were …

The Object-Oriented Design Of A Hardware Description Language Analyser For The Diades Silicon Compiler System, Lian Yang

Dissertations and Theses

This thesis is one of the first to introduce a systematic and general Source Language Analysis System (called SLA) for a high -level synthesis system.

Meeting Notes 1989-12-14 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Report On Joint Roads/Transit Funding For The Portland Metropolitan Area, City Club Of Portland (Portland, Or.)

City Club of Portland

No abstract provided.

Dynamic Behavior Of Co₂ Lasers, Li Zhang

Dissertations and Theses

Spontaneous pulsations have been observed in the output of a CO₂ laser. The temporal waveforms, transverse mode patterns, and laser lines are simultaneously measured under various operation conditions. The experimental data show that these pulsations have a direct connection with the transverse modes. We interpret the oscillations as being caused by mode beating, and the frequency shift of the oscillation as resulting from mode pulling. The theoretical explanations for these effects are in good agreement with the experimental results.

Endless State-Of-Polarization Control For Coherent Optical Communication Systems Using Nematic Liquid Crystal, Scott H. Rumbaugh

Dissertations and Theses

One of the obstacles to coherent fiber-optic communications is the unpredictable polarization drift which necessitates the use of an active polarization controlling system to match the polarizations of the signal and local oscillator. The polarization match must be maintained during the reset of any of the finite range components to prevent loss of data. We present a novel and practical system which uses three liquid crystal devices for the polarization matching process. Also, the required reset control algorithm and its derivation are described in detail.

An Approach To Pattern Recognition Of Multifont Printed Alphabet Using Conceptual Graph Theory And Neural Networks, Ihab A. Harb

Dissertations and Theses

This thesis describes an approach for accomplishing a pattern recognition task using conceptual graph theory and neural networks (NNs). The set of patterns to be recognized are the capital letters of six different fonts of the English alphabet, plus two shifted and six rotated versions of each. The letters are represented to the neural network on a 16x16 input grid (256 "sensor lines"). A standard classification encoding for such patterns is to use a 26-bit vector (26 lines at the NN's output), one bit corresponding to each letter. Experiments with such an encoding yielded results with poor generalization capability. A …

Meeting Notes 1989-11-09 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Meeting Notes 1989-10-12 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

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

Faculty Senate Monthly Packets

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

Meeting Notes 1989-09-14 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Site Location Study For An Integrated Traffic Data Collection System: Phase 1 Report, Kenneth Dueker, Richard Ledbetter, Bruce Rex

Center for Urban Studies Publications and Reports

Improved technology for counting, classifying, and weighing vehicles in the highway traffic stream is becoming increasingly available. Research has been undertaken to make effective use of these new technologies, not just to replace current data collection programs of counting, classifying, and weighing with more efficient versions. This reports on the Phase I research, which had three major objectives;

• a literature review to guide the analysis of alternative methods;
• a statement of requirements to modernize and integrate the data collection programs of traffic counting, vehicle classification and truck weights, and to identify the type and use of traffic data for design, …

Challenges Confronting Metropolitan Portland's Transportation Decision-Making Regime, Sheldon Edner, Sy Adler, Peter B. Morris

Center for Urban Studies Publications and Reports

In this paper we discuss the structure and dynamics of this consensus process through an exploration of a series of challenges to the regime. These challenges include: (1) cultivating new sources of project finance, as the federal government reduces its contribution; and (2) integrating transport projects with regional and local land use plans designed to manage urban growth; in the context of (3) intensifying competition between -business centers within the region, as rapidly growing suburban areas seek transport projects that will facilitate locally-oriented economic growth. We first discuss the institutional and normative elements of the regional consensus process in historical …

Spontaneous Mode Locking In Long-Cavity Xenon Lasers, Manuela Fe Tarroja, Mohammad Sharafi, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

Spontaneous mode locking in Fabry—Perot xenon lasers has been experimentally investigated for cavity lengths up to 66 m. Our results show dependence of the number of pulses per round-trip time on the cavity length and the excitation current. Other dynamical effects such as the ringing and modulation of the mode-locked pulses have been observed. A semiclassical model for the self-locking of an inhomogeneously broadened laser is also presented. Numerical results based on this model describe many dynamical features observed in our experiments.

Augmented Analysis Of Oregon's Special Need Transportation Providers, Janice Dean, Sheldon Edner, Kenneth Dueker, Transportation Northwest (Transnow)

Center for Urban Studies Publications and Reports

This analysis extends the work originally provided in the 1988 Oregon Public Transportation Study by the same authors. The intent is to focus attention on a particularly diverse segment of the public transportation community, special need providers (SNT), in an effort to further specify and define their nature and role in the public transportation system. The results of this analysis are intended to assist the Oregon Department of Transportation, Public Transit Division, with its efforts to implement Oregon's public transportation programs and to provide a basis for further specifying additional research needs in this area.