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Multicomponent Diffusion In Two-Temperature Magnetohydrodynamics, John D. Ramshaw, C. H. Chang

Physics Faculty Publications and Presentations

A recent hydrodynamic theory of multicomponent diffusion in multitemperature gas mixtures [J. D. Ramshaw, J. Non-Equilib. Thermodyn. 18, 121 (1993)] is generalized to include the velocity-dependent Lorentz force on charged species in a magnetic field B. This generalization is used to extend a previous treatment of ambipolar diffusion in two-temperature multicomponent plasmas [J. D. Ramshaw and C. H. Chang, Plasma Chem. Plasma Process. 13, 489 (1993)] to situations in which B and the electrical current density are nonzero. General expressions are thereby derived for the species diffusion fluxes, including thermal diffusion, in both single- and two-temperature multicomponent magnetohydrodynamics (MHD). It …

Irrigation, Power, And Salmon: The Case For Voluntary Water Transfers In The Columbia Basin, Eric Kuhner

Center for Urban Studies Publications and Reports

This paper begins with a brief history of water law in the west, illustrating the roots of conflict over water allocation. A more detailed examination of activities in the Columbia Basin follows, describing the many parties affected by issues of water use and the overlapping institutional structures that govern the river and its water.

Sources of pressure to change the current pattern of water use are then considered. These include requirements to protect endangered salmon runs and the change over time in the relative values of water for power production and irrigation. This section demonstrates how changes in the value …

Circuit Implementation Of A High-Speed Continuous-Time Current-Mode Field Programmable Analog Array (Fpaa), Osama K. Shana'a

Dissertations and Theses

The growing interest in programmable analog circuits has led to the development of Field Programmable Analog Arrays (FPAAs). An FPAA consists of: 1) a programmable cell that can be reconfigured to perform several analog functions. 2) an architecture that interconnects a number of copies of the programmable cell.

In this thesis, the full monolithic circuit implementation of the analog part of the programmable cell is presented. Chapter I gives an introduction to the idea of FPAA and introduces the FPAA architecture and the cell block diagram. Chapter II deals with the design and verification of a differential current-mode four-quadrant multiplier. …

Meeting Notes 1996-05-09 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Faculty Senate Monthly Packet May 1996, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The May 1996 Monthly packet includes the May agenda and appendices and the Faculty Senate minutes and attachments from the meeting held April 1996.

Layout Synthesis For Datapath Designs, Naveen Buddi

Dissertations and Theses

As datapath chips such as microprocessors and digital signal processors become more complex, efficient CAD tools that preserve the regularity of datapath designs and result in small layout area are required. The standard-cell placement techniques ignore the regularity of datapath designs and hence give inefficient layouts. This has necessitated the development of new techniques for datapath module placement.

We developed a layout synthesis tool DataPathLAYOUT, for the bit-slice datapath logic designed using standard-cell libraries. We developed fast and area efficient heuristics for placing the cells in a bit-slice such that the regularity of datapath circuits is preserved and the number …

Meeting Notes 1996-04-11 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Faculty Senate Monthly Packet April 1996, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The April 1996 Monthly packet includes the April agenda and appendices and the Faculty Senate minutes and attachments from the meeting held March 1996.

Postpollination Mechanisms Influencing Mating Patterns And Fecundity: An Example From Eichhornia Paniculata, Mitchell B. Cruzan

Biology Faculty Publications and Presentations

Plant mating systems are influenced by the amount and genetic composition of pollen grains deposited on stigmas and by the ability of recipients to discriminate among pollen from different sources. We describe an experimental procedure that uses limiting and excess pollinations with mixtures of genetically marked pollen to partition the siring success of donors into three components: prefertilization gamete attrition (failure of male gametophytes before fertilization), pollen competitive ability (differences in pollen tube growth rate), and postfertilization gamete attrition (embryo abortion). Regression models for the relationships of pollen load size with each pollen's siring success and total recipient fecundity indicate …

City Club Of Portland Report: Planning For Urban Growth In The Portland Metropolitan Area, City Club Of Portland (Portland, Or.)

City Club of Portland

No abstract provided.

Efficient Buffer Allocation Scheme For Bursty Traffic In Atm Networks Using Fast Reservation Protocol, Nikhil Mukund Deshpande

Dissertations and Theses

One of the major problems in the realization of ATM is traffic management, in particular, the resource allocation for an efficient network. Many approaches to the bandwidth management problems [2] and buffer management problems have been proposed. Boyer [10] suggested a "Fast Bandwidth Reservation" protocol, while Turner [2] applied the same technique to the buffer allocation for the bursty traffic. In this thesis, we extend Turner's scheme in order to make it more efficient with respect to buffer allocation. We define a new parameter "Reduction Factor'', which has the potential of saving a significant amount of buffer space in a …

Meeting Notes 1996-03-14 [Part A] , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Meeting Notes 1996-04-14 [Part B] , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Output-Based Performance Measures For The North Carolina Office Of Waste Reduction, Sheila A. Martin, James R. Youngberg, Albert D. Bethke

Institute of Metropolitan Studies Publications

Research Triangle Institute (RTI) conducted this study to provide the foundation for implementing a results-based performance measurement system. RTI designed a system for NC OWR and similar state waste reduction outreach programs in EPA’s Region 4 that will collect, analyze, report, and maintain the output-based performance measures needed to manage the system, to monitor program scope and effectiveness, and to report to managers and key stakeholders on the program’s success in accomplishing its 0bjectives. Key questions we have addressed in this study include the following:

What is the current best practice for collecting and analyzing information about the effectiveness of …

Faculty Senate Monthly Packet March 1996, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The March 1996 Monthly packet includes the March agenda and appendices and the Faculty Senate minutes and attachments from the meeting held February 1996.

Main Street Handbook: A User's Guide To Main Streets, Metro (Or.)

Metro Collection

No abstract provided.

Planning Implications Of Globalization In Portland, Oregon, James W. Coker

Master of Urban and Regional Planning Workshop Projects

It is the purpose of this paper to shed a little light on information that has been gathered on the trends of globalization; to examine those trends as they are occurring within the region within the context of the values and goals of the Portland metropolitan area; and to offer classmates an opportunity for exploring the meaning of these trends and values as they relate to their own particular planning projects.

In short, this entire project is conceived as a point of departure for recognizing the impact of globalization on contemporary planning practice within the Portland metro area. It offers …

Justice Delayed: A Sixty Year Battle For Indian Fishing Sites, Roberta Ulrich

Dissertations and Theses

The Army Corps of Engineers promised in 1939 that it would provide six fishing sites totaling 400 acres for Indian fishermen to replace 40 sites that would be flooded by the pool behind Bonneville Dam on the Columbia River. The agreement with the Warm Springs, Yakima and Umatilla tribes and Columbia River Indians also included construction of living quarters, boat launches, drying sheds and sanitary facilities. Only five sites were ever acquired and drying sheds and sanitary facilities were built on only two.

This paper traces the delays through war, congressional appropriations, negotiations over sites, law suits, construction of new …

Nonlinearities In The Base Emitter Junction Of Heterojunction Bipolar Transistors, Oliver Woywode

Dissertations and Theses

The nonlinear behaviour of the base emitter junction in HBTs is investigated. Nonlinearities cause troublesome distortion and intermodulation of signals and raise the bit error rate. They are therefore a key issue in microwave communication systems. Hewlett-Packard's Microwave Design System (MDS) software package has been used to simulate these phenomena. The simulation results are verified by an analytical method called nonlinear current method which is a derivative of the Volterra series approach. With the aid of this method new analytical expressions are derived that provide insight into the subtleties of nonlinear phenomena. These expressions are evaluated by the program MAPLE …

Meeting Notes 1996-02-08 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Faculty Senate Monthly Packet February 1996, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The February 1996 Monthly packet includes the February agenda and appendices and the Faculty Senate minutes and attachments from the meeting held January 1996.

Meeting Notes 1996-01-11 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Faculty Senate Proceedings 1996-1997, Portland State University Faculty Senate

Faculty Senate Monthly Packets

Faculty Senate Proceedings from meetings held 1996-1997. 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.

Wapato For The People : An Ecological Approach To Understanding The Native American Use Of Sagittaria Latifolia On The Lower Columbia River, Melissa Cole Darby

Dissertations and Theses

Sagittaria latifolia Willd. was an important root food and trade commodity for the Indians who lived along the Lower Columbia River in early historic times. This plant was prolific in the extensive wetlands of the Lower Columbia from about the great Cascades to the Kalama River. The tubers of this plant were called "wapato" in Chinook Jargon, the local trade language. The wetlands, and this plant that grew there, occupied a vast extent of the Lower Columbia territory; so much so that this valley was named 'Wapato Valley' by Lewis and Clark in 1805. This thesis will provide pertinent information …

Jitter And Wander Reduction For A Sonet Ds3 Desynchronizer Using Predictive Fuzzy Control, Kevin Blythe Stanton

Dissertations and Theses

Excessive high-frequency jitter or low-frequency wander can create problems within synchronous transmission systems and must be kept within limits to ensure reliable network operation. The emerging Synchronous Optical NETwork (SONET) introduces additional challenges for jitter and wander attenuation equipment (called desynchronizers) when used to carry payloads from the existing Plesiochronous Digital Hierarchy (PDH), such as the DS3. The difficulty is primarily due to the large phase transients resulting from the pointer-based justification technique employed by SONET (called Pointer Justification Events or PJEs). While some previous desynchronization techniques consider the buffer level in their control actions, none has explicitly considered wander …

The Development And Evaluation Of Aggregation Methods For Group Pairwise Comparison Judgments, Sida Zhou

Dissertations and Theses

The basic problem of decision making is to choose the best alternative from a set of competing alternatives that are evaluated under conflicting criteria. In general, the process is to evaluate decision elements by quantifying the subjective judgments. The Analytic Hierarchy Process (AHP) provides us with a comprehensive framework for solving such problems. As pointed out by Saaty, AHP "enables us to cope with the intuitive, the rational, and the irrational, all at the same time, when we make multicriteria and multiactor decisions". Furthermore, in most organizations decisions are made collectively, regardless of whether the organization is public or private. …

A Methodology For Regional Seismic Damage Assessment And Retrofit Planning For Existing Buildings, Thomas C. Mccormack

Dissertations and Theses

Recent geologic research has shown that earthquakes more destructive than formerly expected are likely to occur in the Pacific Northwest. To mitigate catastrophic loss, planners are gathering information to make decision on implementing regional seismic retrofit programs. This research develops a model to estimate regional earthquake losses for existing buildings, and determine optimal retrofit priorities and budgets. Fragility curves are developed to provide earthquake damage estimates for a range of seismic intensities. The published earthquake damage estimates of a large group of prominent earthquake engineering experts are extended to include the combined effect of structure type, earthquake-sensitive variations in building …

Solutions Of Linear Equations And A Class Of Nonlinear Equations Using Recurrent Neural Networks, Karl Mathia

Dissertations and Theses

Artificial neural networks are computational paradigms which are inspired by biological neural networks (the human brain). Recurrent neural networks (RNNs) are characterized by neuron connections which include feedback paths. This dissertation uses the dynamics of RNN architectures for solving linear and certain nonlinear equations. Neural network with linear dynamics (variants of the well-known Hopfield network) are used to solve systems of linear equations, where the network structure is adapted to match properties of the linear system in question. Nonlinear equations inturn are solved using the dynamics of nonlinear RNNs, which are based on feedforward multilayer perceptrons. Neural networks are well-suited …

Simple Approximation For Thermal Diffusion In Ionized Gas Mixtures, John D. Ramshaw

Physics Faculty Publications and Presentations

A simple approximation for thermal diffusion in gas mixtures was recently proposed [1]. This approximation was based upon relations valid for rigid spheres. It is therefore appropriate for molecules with steep repulsive potentials, but not for ionized species interacting via the Coulomb potential. Here we formulate an analogous approximation for ionized species and free electrons. The resulting thermal diffusion coefficients differ in sign from those for hard molecules.

Friction-Weighted Self-Consistent Effective Binary Diffusion Approximation, John D. Ramshaw, C. H. Chang

Physics Faculty Publications and Presentations

The self-consistent effective binary diffusion (SCEBD) approximation for multicomponent diffusion in gas mixtures is reconsidered and reformulated. The new formulation is based on the fact that a suitable rearrangement of the Stefan-Maxwell equations provides an exact expression for the complementary mean velocity a_i for species i as a weighted average of the velocities of all the other species. The coefficients in a_i are normalized friction coefficients which are simply related to the true binary diffusion coefficients. A simple factorized bilinear approximation to the friction coefficients then yields approximate species diffusion fluxes identical in form to those of a …