Digital Commons Network^™

Fine-Grain Period Adaptation In Soft Real-Time Environments, David Steere, Joshua Gruenberg, Dylan Mcnamee, Calton Pu, Jonathan Walpole

Computer Science Faculty Publications and Presentations

Reservation-based scheduling delivers a proportion of the CPU to jobs over a period of time. In this paper we argue that automatically determining and assigning this period is both possible and useful in general purpose soft real-time environments such as personal computers and information appliances. The goal of period adaptation is to select the period over which a job is guaranteed to receive its portion of the CPU dynamically and automatically. The choice of period represents a trade-off between the amount of jitter observed by the job and the overall efficiency of the system. Secondary effects of period include quantization …

Qos Scalability For Streamed Media Delivery, Charles Krasic, Jonathan Walpole

Computer Science Faculty Publications and Presentations

Applications with real-rate progress requirements, such as mediastreaming systems, are difficult to deploy in shared heterogenous environments such as the Internet. On the Internet, mediastreaming systems must be capable of trading off resource requirements against the quality of the media streams they deliver, in order to match wide-ranging dynamic variations in bandwidth between servers and clients. Since quality requirements tend to be user- and task-specific, mechanisms for capturing quality of service requirements and mapping them to appropriate resource-level adaptation policies are required. In this paper, we describe a general approach for automatically mapping user-level quality of service specifications onto resource …

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

Portland State Magazine

PSU’s alumni magazine, published 2-3 times a year. In this issue: The Willamette River can be made safe to drink, say researchers, but who wants to?; the technology for a super fast, home, Internet connection is brand new, in demand, and taught at Portland State; new help is finding the right word and the right career in writing; performing jazz drives this alumna to local night spots and to the recording studio; alumni and faculty support a program that links at-risk children with long-term mentors; and more.

Double-Pass High-Gain Laser Amplifiers, Janet M. Casperson, Frederick G. Moore, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

Double-pass laser amplifiers have advantages of compactness and efficiency in the amplification of optical signals, and such amplifiers have been employed in a wide range of optical systems. Work in this area is reviewed briefly, and analytical solutions are obtained for the intensity of the electromagnetic waves in double-pass homogeneously-broadened high-gain laser amplifiers. Expressions are derived relating the output power to the input, including the effects of arbitrary mirror reflectivity and frequency detuning from line center. In the limits of weak saturation and of high reflectivity the results are consistent with earlier studies.

Capillary Surfaces In An Exotic Container: Results From Space Experiments, Paul Concus, Robert Finn, Mark M. Weislogel

Mechanical and Materials Engineering Faculty Publications and Presentations

Experimental results from the Interface Configuration Experiment (ICE) performed aboard the Space Shuttle and the Mir Space Station are reported. The experiment concerns fluid interfaces in certain ‘exotic’ containers in a low-gravity environment. These containers are rotationally symmetric and have the property that for given contact angle and liquid volume, a continuum of distinct rotationally symmetric equilibrium configurations can appear, all of which have the same mechanical energy. These symmetric equilibrium configurations are unstable, in that deformations that are not rotationally symmetric can be shown mathematically to yield configurations with lower energy. It is found experimentally, in confirmation of mathematical …

Modeling Macrophytes Of The Columbia Slough, Oregon, Chris Berger, Scott A. Wells

Civil and Environmental Engineering Faculty Publications and Presentations

The Columbia Slough is a tidally influenced freshwater system of wetlands, channels, and lakes located within the Portland, Oregon metropolitan area at the confluence of the Willamette and Columbia Rivers. It is a eutrophic water body susceptible to algae blooms and crashes and periods of high pH which violate water quality standards. High nutrient loads from groundwater principally controls algae productivity. Past structural changes to the Columbia Slough have included filling of wetlands and lakes and the construction of levees, dikes, culverts and irrigation channels. These changes have altered the natural flow dynamics creating an environment more conducive to eutrophication. …

City Club Of Portland Information Report: Endangered Fish Species In Portland, City Club Of Portland (Portland, Or.)

City Club of Portland

No abstract provided.

Meeting Notes 1999-07-08 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Defining Issues: An Outline For The Future Of Our Region, Portland State University. Institute Of Portland Metropolitan Studies

Institute of Metropolitan Studies Publications

Exploration of critical "super-regional" issues defined at the 1998 Annual Leadership Conference.

Meeting Notes 1999-06-17 [Part F] , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Meeting Notes 1999-06-17 [Part D] , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Meeting Notes 1999-06-17 [Part A] , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Meeting Notes 1999-06-17 [Part E] , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Documentary Proposal, Ernest Bonner

Ernie Bonner Collection

No abstract provided.

City Club Of Portland Report: Privatization Of Government Services, City Club Of Portland (Portland, Or.)

City Club of Portland

No abstract provided.

Faculty Senate Monthly Packet June 1999, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The June 1999 Monthly packet includes the June agenda and appendices and the Faculty Senate minutes and attachments from the meeting held May 1999.

Meeting Notes 1999-05-13 [Part B] , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Meeting Notes 1999-05-13 [Part A] , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Anti-Blooming Nightvision: Extending Global Dynamic Range By Neural Network Image Fusion, Daniel L. Schuster

Dissertations and Theses

Sensor saturation in the presence of bright objects can create a non-restorable loss of image information as the spatial gradient tends to zero. Blooming is an attendant morphological corruption of image data that plagues quantum well sensors, and in particular, low-light Charge-Coupled Devices (CCD's) used for nightvision applications. A novel application of Radial Basis Function Neural Networks has shown promise as a means for patching gain/brightness adjusted short exposure frame detail into the bloomed regions of long exposure image frames. A computer-tethered CCD camera was used to capture robust target images, at different exposures, in a controlled light-box environment to …

The Universal Nature Of Hatred: Keith Stimely And The Culture Of Holocaust Denial, Linda Maizels

Dissertations and Theses

A partial accounting of the discord beneath the seeming conformity of opinion within the insular community of the proponents of Holocaust denial was documented and preserved by Keith Stimely, a Holocaust denier who donated his personal papers to the University of Oregon Special Collections Library in 1991. The thesis uses the Stimely Collection to emphasize the universal nature of the hatred and animosity inherent in the denial movement.

Chapter One surveys revisionist historiography concerning both world wars and the manner in which the deniers appropriated the trappings of revisionism in their attempt to rewrite the history of the Nazi genocide …

Moorings, Nancy Jeanne Slavin

Dissertations and Theses

This novel is set in the fictional town of Snug Harbor, Alaska - a small south-coastal fishing village. The beauty and ruggedness of the natural environment constantly inform the movements of the purse seining fleet, the local businesses, and, especially, the people. The characters' connections and experiences with the land and sea scapes are integral to how they perceive their internal worlds. As the seasons progress quickly from the opening chapter of the spring equinox, the arrival of light augments the townspeople's activities.

The novel alternately is told through the third person viewpoints of two protagonists, who both tend to …

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

Portland State Magazine

PSU’s alumni magazine, published 2-3 times a year. In this issue: Adventurous theater from around the globe comes to Portland each summer through PIP Fest; a long-forgotten burial ground in New York City is providing new clues into 18th-century slavery; dependable, dedicated and loud, Vern Schultz is always there for the Vikings; former governor Barbara Roberts is on faculty sharing what she knows best—leading in times of change; broken homes, collapsed tunnels, washed-out roads, and eroded beaches—PSU geologists say this is just the beginning; and more.

Faculty Senate Monthly Packet May 1999, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The May 1999 Monthly packet includes the May agenda and appendices and the Faculty Senate minutes and attachments from the meeting held April 1999.

Meeting Notes 1999-04-08 [Part A] , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Meeting Notes 1999-04-08 [Part B] , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Benefit Analysis Of Igbt Power Device Simulation Modeling, Michael P. Gallaher, Sheila A. Martin

Institute of Metropolitan Studies Publications

The National Institute of Standards and Technology’s Electronic and Electrical Engineering Laboratory (NIST/EEEL) program supports the development of mathematical models for several classes of semiconductor devices. This study presents the results from a microeconomic impact assessment of the development of mathematical models for the design of insulated-gate bipolar transistor (IGBT) semiconductor power devices. NIST/EEEL’s IGBT mathematical modeling program (referred to as the NIST IGBT modeling program) has led to significant economic benefits. These benefits include: improvements in R&D efficiency, decreases in transaction costs, decreases in production costs, and improvements in product quality.

NIST’s activities have affected software companies, IGBT device …

Faculty Senate Monthly Packet April 1999, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The April 1999 Monthly packet includes the April agenda and appendices and the Faculty Senate minutes and attachments from the meeting held March 1999.

Enhancements To The Scalable Coherent Interface Cache Protocol, Robert J. Safranek

Dissertations and Theses

As the number of NUMA system's cache coherency protocols based on the IEEE Std. 1596-1992, Standard for Scalable Coherent Interface (SCI) Specification increases, it is important to review this complex protocol to determine if the protocol can be enhanced in any way. This research provides two realizable extensions to the standard SCI cache protocol. Both of these extensions lie in the basic confines of the SCI architectures.

The first extension is a simplification to the SCI protocol in the area of prepending to a sharing list. Depending if the cache line is marked "Fresh" or "Gone", the flow of events …

Meeting Notes 1999-03-11 [Part A] , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Meeting Notes 1999-03-11 [Part B] , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.