Digital Commons Network^™

Synthetic Files: Enabling Low-Latency File I/O For Qos-Adaptive Applications, Dylan Mcnamee, Dan Revel, Calton Pu, David Steere, Jonathan Walpole

Computer Science Faculty Publications and Presentations

Files are a tried and true operating system abstraction. They present a simple byte-stream model of I/O that has proven intuitive for application programmers and efficient for operating system builders. However, current file systems do not provide good support for adaptive continuous media (CM) applications - an increasingly important class of applications that exhibit complex access patterns and are particularly sensitive to variations in I/O performance. To address these problems we propose synthetic files. Synthetic files are specialized views of underlying regular files, and convert complex file access patterns into simple sequential synthetic file access patterns. Synthetic file construction can …

Meeting Notes 1998-07-09 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Šawaš Ili?I-Šawaš Wawa -- 'Indian Country--Indian Language' : A Participant Observation Case Study Of Language Planning By The Confederated Tribes Of The Grand Ronde Community Of Oregon, Gregry Michael Davis

Dissertations and Theses

The Kwelth Tahlkie Culture and Heritage Board (KTC&HB) of the Confederated Tribes of the Grand Ronde Community of Oregon (CTGR) have made it a priority to revitalize one of the languages which historically has been associated with being a Grand Ronde Indian-Chinook Jargon, referred to as činuk wawa 'Chinook talk' or simply činuk.

The purpose of the present study was to observe the language planning process as executed by the KTC&HB. Initial guiding questions were: (i) What stages is the KTC&HB going through in the process of planning for činuk revitalization? (ii) How do these efforts compare with theory and …

Quality Of Service Semantics For Multimedia Database Systems, Jonathan Walpole, Charles Krasic, Ling Liu, David Maier, Calton Pu, Dylan Mcnamee, David Steere

Computer Science Faculty Publications and Presentations

Quality of service (QoS) support has been a hot research topic in multimedia databases, and multimedia systems in general, for the past several years. However, there remains little consensus on how QoS support should be provided. At the resource-management level, systems designers are still debating the suitability of reservation- based versus adaptive QoS management. The design of higher system layers is less clearly understood, and the specification of QoS requirements in domain-specific terms is still an open research topic. To address these issues, we propose a QoS model for multimedia databases. The model covers the specification of user-level QoS preferences …

Photoadaptation Rate Of Synechococcus Wh7803 Cultures At Two Iron Concentrations, Jon Daniel Moulton

Dissertations and Theses

The marine cyanobacterium Synechococcus WH7803 adapts to changes in light intensity by changing its photosynthetic physiology. This work is a study o f the rate o f photoadaptation of Synechococcus WH7803 in laboratory cultures. Cultures were shifted from constant 8 µEm^-2s^-1 light to constant 80 µEm^-2s^-1 light, from constant 80 µEm^-2s^-1 light to 8 µEm^-2s^-1 light and from different light regimes to a single fluctuating light regime. The response of high iron cultures grown in modified aquil culture medium at 5*10^-6M Fe was compared with the …

Location Independent Names For Nomadic Computers, David Steere, Mark Morrissey, Peter Geib, Calton Pu, Jonathan Walpole

Computer Science Faculty Publications and Presentations

Recent advances in the Domain Name System (DNS) and the Dynamic Host Configuration Protocol (DHCP) have enabled a new approach to supporting mobile users: location independent naming. In this approach, machines use the same hostname from any internet location, but use an IP address that corresponds to their current location. We describe a protocol that implements location independent naming for nomadic computers, i.e., machines that do not need transparent mobility. Our protocol allows hosts to move across security domains, uses existing protocols, and preserves existing trust relationships. Therefore, it preserves the performance and security of normal IP for nomadic computers …

Meeting Notes 1998-05-14 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Information Content In American Television Advertising: A Replication And Update, Laura Kathleen Sandgren

Dissertations and Theses

Three hundred and seven randomly selected American network television commercials aired between October 18 and November 18, 1997 were analyzed to determine their informational value using the fourteen criteria established by Resnik and Stem in 1977. The results of this study were compared with Resnik and Stem's 1991 study, revealing that there has not been any significant change in the amount of information in American television commercials since Resnik and Stem's replication sample.

This study also used Resnik and Stem's (1977) criteria to further examine if the amount-of information contained in TV commercials varied depending on the gender or age …

Gene Expression In Two Cyanobacteria, Freshwater Synechococcus Sp. Pcc 7942 And Oceanic Synechococcus Sp. Wh 7803, In Response To Ammonium, Nitrate Or Iron, Abbas Sadeghi

Dissertations and Theses

The transcriptional response of freshwater Synechococcus sp. PCC 7942 and oceanic Synechococcus sp. WH 7803 to ammonium, nitrate or iron was studied in single or multiple factor limited cultures. Both strains showed maximum production of NiR mRNA when grown in nitrate-containing media. When grown in ammonium-containing medium, they did not show any signal for NiR mRNA synthesis. The influence on the transcription of NiR mRNA by iron as sole limiting nutrient was also evaluated. Iron increased the NiR mRNA whether or not the positive effect of nitrate was already present. The hybridization signal of mRNA for the large subunit of …

A Descriptive Study Of First-Year Students Of Color At Portland State University: The Student's Perspective, Dorothy Claire Oliveros

Dissertations and Theses

The population of the United States is rapidly growing and the country's demographics are changing. As the U.S. population nears 269 million, 74.2 million represent ethnic minorities. Hence, many more ethnic minority students will enter the hallways of academe. Therefore, it is important for institutions of higher education to provide ethnic and racially diverse students opportunities for academic and social development within the educational setting.

Attending predominantly white institutions can cause ethnic minority students social, cultural, and mental adjustments that may affect academic achievement.

This thesis is an examination of the similarities and differences among first-year African American, Latino, and …

Faculty Senate Monthly Packet May 1998, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The May 1998 Monthly packet includes the May agenda and appendices and the Faculty Senate minutes and attachments from the meeting held April 1998.

Adaptation Space: Surviving Non-Maskable Failures, Crispin Cowan, Lois Delcambre, Anne-Francoise Le Meur, Ling Liu, David Maier, Dylan Mcnamee, Michael Miller, Calton Pu, Perry Wagle, Jonathan Walpole

Computer Science Faculty Publications and Presentations

Some failures cannot be masked by redundancies, because an unanticipated situation occurred, because fault-tolerance measures were not adequate, or because there was a security breach (which is not amenable to replication). Applications that wish to continue to offer some service despite nonmaskable failure must adapt to the loss of resources. When numerous combinations of non-maskable failure modes are considered, the set of possible adaptations becomes complex. This paper presents adaptation spaces, a formalism for navigating among combinations of adaptations. An adaptation space describes a collection of possible adaptations of a software component or system, and provides a uniform way of …

Temperature Sensitivity Of El Tor 01, Classical 01, And 0139 Vibrio Cholerae, Michelle Angela O'Neill

Dissertations and Theses

Vibrio cholerae has long been recognized as the causative agent of the disease cholera, but what has only become evident in recent years is the role of the environment in cholera. The cholera bacterium is found autochthonously in the marine and estuarian environment, and if there is any hope of controlling the disease the environmental aspects must be understood.

The central questions addressed in this study were how bacterial survival was influenced by temperature and the role that available nutrients play in V. cholerae survival. Survival of three different V. cholerae strains [classical (01); El Tor (01), and El Tor …

The Antiquities Act Of 1906: The Public Response To The Use Of Presidential Power In Managing Public Lands, Barbara L. Grover

Dissertations and Theses

President Clinton created Grand Staircase-Escalante National Monument on September 17, 1996. The Antiquities Act of 1906 gives the president power to establish national monuments on public lands through presidential proclamation. The Act has been used to create national monuments in places such as Muir Woods, Grand Canyon, Mount Olympus, Jackson Hole, and the 1978 Alaskan d-2 lands. Its use has also produced negative public response, manifested as demonstrations, lawsuits, and congressional bills.

In spite of significant legal and legislative challenges, the Antiquities Act and most of the monuments established through its use remain. The negative public response to the Act …

Meeting Notes 1998-04-09 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Faculty Senate Monthly Packet April 1998, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The April 1998 Monthly packet includes the April agenda and appendices and the Faculty Senate minutes and attachments from the meeting held March 1998

Hermite–Sinusoidal-Gaussian Beams In Complex Optical Systems, Lee W. Casperson, Anthony A. Tovar

Electrical and Computer Engineering Faculty Publications and Presentations

Sinusoidal-Gaussian beams have recently been obtained as exact solutions of the paraxial wave equation for propagation in complex optical systems. Another useful set of beam solutions for Cartesian coordinate systems is based on Hermite–Gaussian functions. A generalization of these solution sets is developed here. The new solutions are referred to as Hermite–sinusoidal-Gaussian beams, because they are in the form of a product of Hermite-polynomial functions of either complex or real argument, sinusoidal functions of complex argument, and Gaussian functions of complex argument. These beams are valid for propagation through systems that can be represented in terms of complex beam matrices, …

Meeting Notes 1998-03-12 [Part A] , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Transit Time Internet Access, Janet Vorvick, Kenneth Dueker

Center for Urban Studies Publications and Reports

Transit Time Internet Access (TTIA) is a World Wide Web (WWW) application which delivers real-time bus schedule information to users of the Internet. TTIA allows a bus rider to request and receive schedule deviation information about a specific bus at a specific timepoint. This report explains the design of TTIA, the specifics of the implementation, the issues of scope, the problems that were encountered and some conclusions.

Field Solutions For Bidirectional High-Gain Laser Amplifiers And Oscillators, Lee W. Casperson, Mohammad Azadeh

Electrical and Computer Engineering Faculty Publications and Presentations

General analytical solutions are obtained for the amplitude, phase, and intensity of the electromagnetic waves in bidirectional homogeneously broadened high-gain laser amplifiers and oscillators. These solutions are important as increasingly high-gain lasers are being employed in practical systems. Expressions are derived relating the output power to the input, including the effects of arbitrary mirror reflectivities and frequency detunings from the line center. For negligible reflectivities, these regenerative amplifier results reduce to earlier expressions for single-pass high-gain amplifiers. Multivalued outputs also occur, and in the limit of low gain per pass the results are consistent with earlier studies of single-frequency laser …

Speech Intelligibility Of 4-Year-Old Children, M. Jane Firestone

Dissertations and Theses

While speech-language pathologists routinely measure and report speech intelligibility when assessing young children with speech impairments, normative data have not been available for comparison purposes. When assessing children to determine if their communication abilities are at or below that of peers, one must first know what the normative standards are. Knowing the normal distribution for speech intelligibility at several ages would allow for more precise uses of the intelligibility information than is currently possible. Only a few available studies exist to allow tentative normative comparisons of speech intelligibility data.

The goals of this pilot study were to collect normative data …

Meeting Notes 1998-02-12 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Faculty Senate Monthly Packet February 1998, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The February 1998 Monthly packet includes the February agenda and appendices and the Faculty Senate minutes and attachments from the meeting held January 1998.

Illegal Drug Use During Pregnancy: The Effects Of Defendant Race And Type Of Defense On Juror Judgments Of Guilt, Anita Rotondo

Dissertations and Theses

Since the early 1980s fetal harm "caused" by women's illegal drug use during pregnancy has garnered public attention and legal scrutiny. Motivated by concerns over fetal health, the cost of caring for drug-addicted infants, and public support for get tough on crime policies, various states have employed statutes on child abuse, neglect or endangerment, delivering a controlled substance to a minor and contributing to the delinquency of a minor to criminally inculpate maternal drug users.

Utilizing a written hypothetical trial summary in which a woman was charged with child abuse for using cocaine while pregnant, this research explored the effects …

Meeting Notes 1998-01-15 , Joint Policy Advisory Committee On Transportation

Joint Policy Advisory Committee on Transportation

No abstract provided.

Annual Faculty Senate Minutes October 1998 - June 1999, Portland State University Faculty Senate

Annual Compilations of the Faculty Senate Minutes (Minutes Only)

Minutes of the Faculty Senate for October 1998 to June 1999.

Bulletin: General Catalog Issue 1998-1999, Portland State University

Bulletin & Curriculum Change Documents

No abstract provided.

Faculty Senate Monthly Packet January 1998, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The January 1998 Monthly packet includes the January agenda and appendices and the Faculty Senate minutes and attachments from the meeting held December 1997.

Few-Cycle Pulses In Two-Level Media, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

Techniques for producing, measuring, and applying ever shorter electromagnetic pulses are being developed for incorporation in a variety of modern high-speed systems. In many cases these pulses are at most a few cycles in length, and so-called half-cycle electromagnetic pulses are also widely employed. The interaction of such pulses with two-level media is considered here in detail, and these media are basic to many of the absorbing and amplifying configurations of optics and laser studies. Significant delays and distortion of the resulting polarization and population pulses can occur, and nonlinear optical effects are also revealed. The limitations of the parity, …

Free Trade, Regionalism, And The Democratic Peace Theory, Julia B. Johnson

Dissertations and Theses

Democratic nations worldwide rarely, if ever, go to war against one another. A variety of reasons for these peace loving democracies are offered in the social sciences literature. Many proponents of the theory of a democratic peace argue that democratic nations do not war against one another because of similar libertarian norms of behavior, and prohibitive structural institutions.

This thesis disagreed with the above assessment of peaceful democratic norms and institutions, and sought instead to investigate the role of economic prosperity as a crucial element of international cooperation. Combining the characteristics of democracy and economic prosperity, more fully rounded out …