Digital Commons Network^™

3-D Modelling Of Ic Interconnect Using Openaccess And Art Of Illusion, Navaneeth Prasannakumar Jamadagni

Dissertations and Theses

In search of higher speed and integration, the integrated circuit (IC) technology is scaling down. The total on-chip interconnect length is increasing exponentially. In fact, interconnect takes up the most part of the total chip area. The parasitics associated with these interconnect have significant impact on the circuit performance. Some of the effects of parasitics include cross talk, voltage drop and high current density. These issues can result in cross-talk induced functional failure and failures due to IR drop and electro-migration. This has resulted in interconnect- driven design trend in state-of-the-art integrated circuits. Reliability analysis, that includes simulating the effects …

Model Analysis Of The Hydrologic Response To Climate Change In The Upper Deschutes Basin, Oregon, Michael Scott Waibel

Dissertations and Theses

Considerable interest lies in understanding the hydrologic response to climate change in the upper Deschutes Basin, particularly as it relates to groundwater fed streams. Much of the precipitation occurring in the recharge zone falls as snow. Consequently, the timing of runoff and recharge depend on accumulation and melting of the snowpack. Numerical modeling can provide insights into evolving hydrologic system response for resource management consideration. A daily mass and energy balance model known as the Deep Percolation Model (DPM) was developed for the basin in the 1990s. This model uses spatially distributed data and is driven with daily climate data …

Participatory Action Research With Dignity Village: An Action Tool For Empowerment Within A Homeless Community, Heather Irene Mosher

Dissertations and Theses

With homelessness continuing to rise over the past two decades, disenfranchised unhoused people have sparked a national movement to build for themselves democratically governed communities of affordable housing. Dignity Village, in Portland Oregon, is one of the longest running and most organized self-help housing communities in the nation. This paper presents a theoretical systems-based model of a developmental pathway out of homelessness in the U.S. that has as one of its key steps membership and participation in humane and dignified "self-help micro-housing"; communities such as Dignity Village.

This research involved working collaboratively with Dignity Village on a participatory action research …

The Moderating Effect Of Role Quality On The Relationship Between Work-Family Conflict And Well-Being: A Longitudinal Study, Jenna Risa Lecomte-Hinely

Dissertations and Theses

Work-family conflict (WFC) is a stressor that can cause negative consequences, including deleterious effects on an individual's health and well-being. This study examined this relationship through the lens of the Job Demands-Resources (JD-R) Model. This study expanded on two recent applicable studies to examine role quality as a moderator of the WFC-well-being relationship. Well-being was operationalized by three constructs: overall health, depression, and life satisfaction. Hierarchical regression analyses were used to test the hypotheses that a negative relationship existed between WFC and the three well-being outcomes over time, and that this negative relationship between WFC and well-being could be reduced …

S-Nitrosothiols: Formation, Decomposition, Reactivity And Possible Physiological Effects, Moshood Kayode Morakinyo

Dissertations and Theses

Three biologically-active aminothiols cysteamine (CA), DL-cysteine (CYSH) and DL-homocysteine, were studied in this thesis. These aminothiols react with nitrous acid (HNO₂), prepared in situ, to produce S-nitrosothiols (RSNOs): S-nitrosocyteamine (CANO), S-nitrosocysteine (CYSNO) and S-nitrosohomocysteine (HCYSNO). They also react with S-nitrosoglutathione (GSNO) and S-nitroso-N-acetylpenicillamine (SNAP) through a transnitrosation reaction to produce their corresponding RSNOs. A detailed kinetics and mechanistic study on the formation of these RSNOs and their subsequent decomposition to release nitric oxide (NO) were studied.

For all three aminothiols the stoichiometry of their reaction with nitrous acid is strictly 1:1 with the formation of one mole …

Investing And Vesting International Students' Expressive Resources In Social Capital At Portland State University, Mami Kikuchi

Dissertations and Theses

The study expands the conceptual and methodological precepts of social capital by examining how international students receive social capital from their friends and how students provide social capital to their friends in a North American university setting. The author examines the degree of emotional support that the participants provide ("Investing" social capital) and the support they receive from their friends ("Vesting" social capital), and the relationships between the two social capital variables. In addition, the study examines the influence of demographics and social interaction on social capital, and the influence of social capital on satisfaction. The study suggests that vesting …

Identity, Nostalgia And Leisure: Technology Use In Second Homes, Françoise Bourdonnec

Dissertations and Theses

This thesis, based on two years of ethnographic fieldwork in the US, Russia, France and Australia, focuses on technology use in second homes and its implications for technology design. I highlight the unexpectedly strong sense of nostalgia, for place as well as for richer relationships, felt in second homes around the world, and the ways in which second home residents use technology to shape space and behavior to reinforce this link to an imagined past. I show that the transition between main and second homes, with its rituals of preparation and transition between physical locations, allows residents to assume different …

Removing Textured Artifacts From Digital Photos Using Spatial Frequency Filtering, Ben Huang

Dissertations and Theses

An abstract of the thesis of Ben Huang for the Master of Science in Electric and Computer Science presented [August 12nd, 2010]. Title: Removing textured artifacts from digital photos by using spatial frequency filtering Virtually all image processing is now done with digital images. These images, captured with digital cameras, can be readily processed with various types of editing software to serve a multitude of personal and commercial purposes. But not all images are directly captured and even of those that are directly captured many are not of sufficiently high quality. Digital images are also acquired by scanning old paper …

The Effects Of Animals On Children's Development Of Perspective-Taking Abilities, Mika Maruyama

Dissertations and Theses

Although attention to the effects of child-animal interactions on children's development has increased in the last three decades, developmental psychology has not attended to the importance of the effects of animals on children's development. There is a need to consider the possible impacts of animals as significant social partners for children's socioemotional development. The current study, through survey questionnaires and interview methods, investigated whether interacting with animals, especially when children have responsibilities for the welfare of pets and perhaps have formed strong attachments with pets, will promote children's socio-emotional development, specifically their abilities to take the perspective of others. Sixty-five …

Modular, Configurable Bus Architecture For Ease Of Ip Reuse On System On Chip And Asic Devices, Naveendran Balasingam

Dissertations and Theses

Integrated Circuit (IC) designs are increasingly moving towards Intellectual Property (IP) reuse for various targeted products and market segments. Therefore, there is a need to share and synergize internal bus architectures to enable the reuse of IP blocks for various ASIC and SoC applications. Due to the different market segments of various ASICs and SoCs, design teams and architects have opted to use customized internal bus architectures to suit the respective targeted features for their market segments. As a result, many ASIC and SoC companies that produce microprocessors for computers, microcontrollers for consumer electronics as well as memory and I/O …

Performance Measures For Managerial Decision Making: Performance Measurement Synergies In Multi-Attribute Performance Measurement Systems, Robert Andrew Fowke

Dissertations and Theses

This research tests for correlation between corporate performance and use of financial measures, nonfinancial measures, and number of balanced scorecard categories used. Literature notes a preference for managing by nonfinancial measures because financial measures are lagging indicators, but little empirical evidence is available on the relationship between nonfinancial measures and financial performance, and few companies are found to realize the benefits of nonfinancial measurements. The balanced scorecard has been studied to find the impact of diversity of performance measures, and anecdotal improvements have been reported, but there is a paucity of empirical evidence regarding how the use of a balanced …

Family Relationship Quality And Acculturation: Examination Of Their Relationship Among Latino Adolescent Sexual Offenders, Lindsey B. Patterson

Dissertations and Theses

Research on child sexual abuse (CSA), from the perspective of the perpetrator, has been conducted to better inform intervention and prevention programs. Although information from perpetrators can be beneficial for these programs, much of the research is limited by the diversity of sample populations of sex offenders. Moreover, potentially distinct variables relevant to specific populations (e.g., Latinos) have not been thoroughly studied in relation to CSA. To better understand the perpetration of CSA on variables that may be of particular concern to Latinos (i.e., relationship quality in familial supervision and acculturation strategies), the purpose of the present study was to …

Somatization And Engagement In Mental Health Treatment, Teresa Chianello

Dissertations and Theses

Somatization, the presentation of physical symptoms without an identifiable cause, is among the most common problems in primary medical care. Treatment approaches are typically offered within the medical consultation interview once the medical provider distinguishes between physical and emotional etiology. This dualistic strategy is especially troublesome for patients whose physical complaints cannot be validated and who are recommended for only mental health therapy. The aim of this study was to examine how medical practitioners can instead motivate patients to consider both physical and emotional treatment. An analogue intervention consisting of an enhanced consultation interview was compared to a care as …

Initiation Zone Characterization Of Debris Flows In November, 2006, Mount Hood, Oregon, Rachel Pirot

Dissertations and Theses

In November, 2006, a storm generated a minimum of 34 cm of precipitation in six days, triggering debris flows in many of the drainages on all sides of Mount Hood, Oregon. Of the eleven drainages surveyed, seven experienced debris flows; these include the White River, Salmon River, Clark Creek, Newton Creek, Eliot Creek, Ladd Creek and Sandy River basins. Flows in the White River, Eliot Creek, and Newton Creek, caused major damage to bridges and roadways. Initiation elevations averaged around 1,860 meters. Initiation zone material was predominantly sand (45-82%) with gravel (15-49%) and had few fines (3-5%). Four debris flows …

Writing Chinuk Wawa: A Materials Development Case Study, Sarah A. Braun Hamilton

Dissertations and Theses

This study explored the development of new texts by fluent non-native speakers of Chinuk Wawa, an endangered indigenous contact language of the Pacific Northwest United States. The texts were developed as part of the language and culture program of the Confederated Tribes of the Grand Ronde Community of Oregon for use in university-sponsored language classes. The collaborative process of developing 12 texts was explored through detailed revision analysis and interviews with the materials developers and other stakeholders.

Fluent non-native speakers relied on collaboration, historical documentation, reference materials, grammatical models, and their own intuitions and cultural sensibilities to develop texts that …

Public Opinion And Public Engagement With Genetically Modified Foods : A Qualitative Study, Celeste Laurana Moser

Dissertations and Theses

The purpose of the current study was to understand public opinion formation by determining what factors influence opinion leaders in the organic food community to engage in the genetically modified food debate, and how opinion leaders describe American lay publics' engagement in the debate.

A Dynamic Physical Model For Soil Temperature And Water In Taylor Valley, Antarctica, H. W. Hunt, Andrew G. Fountain, Peter T. Doran, Hassan J. Basagic

Geography Faculty Publications and Presentations

We developed a simulation model for terrestrial sites including sensible heat exchange between the atmosphere and ground surface, inter- and intra-layer heat conduction by rock and soil, and shortwave and longwave radiation. Water fluxes included snowmelt, freezing/thawing of soil water, soil capillary flow, and vapour flows among atmosphere, soil, and snow. The model accounted for 96-99% of variation in soil temperature data. No long-term temporal trends in soil temperature were apparent. Soil water vapour concentration in thawed surface soil in summer often was higher than in frozen deeper soils, leading to downward vapour fluxes. Katabatic winds caused a reversal of …

The Portland Spectator, December 2009, Portland State University. Student Publications Board

Portland Spectator

Editor: Joe Wirtheim

Articles in this issue include: One pill makes you smarter; Proudfoot takes a side step; Sustainability keeps on going; More than a student club; Witnessing the purge; and Fueling free speech with FIRE

Governance In Motion: Service Provision And Child Welfare Outcomes In A Performance-Based, Managed Care Contracting Environment, Bowen Mcbeath, William Meezan

School of Social Work Faculty Publications and Presentations

Examining the linkage between service provision and client outcomes is important in performance-based human service environments. Since most performance initiatives reward agencies for improving client outcomes rather than providing specific services, managers may have incentives to streamline workers’ efforts and reduce resources devoted to services considered nonessential. This article uses data from a performance-based child welfare initiative to examine the relationship between child permanency outcomes, the services provided by caseworkers, and the environment surrounding frontline service provision. Findings indicate that greater service efforts are required to reunify children with parents than to reach other outcomes, including adoption and placement with …

Creating Insanity In Learning Systems: Addressing Ambiguity Effects Of Predicting Non-Linear Continuous Valued Functions With Reconstructabilty Analysis From Large Categorically Valued Input Data Sets, William D. Eisenhauer

Systems Science Friday Noon Seminar Series

Being told to give two different, and potentially counter, responses to the same stimulus can set up a double bind in humans, leading to a type of insanity. So what how do you deal with it when it comes up quite frequently in modeling through simplification and removal of predictive variables?

In his current dissertation research Ike Eisenhauer is using reconstructability analysis to implement K-System, U-System, and B-System approaches to predict a continuously valued function through discrete categorically valued input variables [e.g. textual data]. One of the key issues is how to address the inability of K-Systems and U-Systems to …

Faculty Senate Monthly Packet December 2009, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The December 2009 Monthly packet includes the December agenda and appendices and the Faculty Senate minutes and attachments from the meeting held November 2009

Citizens’ Local Political Knowledge And The Role Of Media Access, Lee Shaker

Communication Faculty Publications and Presentations

Locally based media institutions that have been at the core of citizens' media environments for generations are facing an onslaught of new competition from new media. The twin goals of this article are to expand our understanding of the distribution of local political knowledge in general and to specifically examine the relevance of media access. The article suggests that media access does bear upon levels of local political knowledge and confirms that citizens who are knowledgeable about local politics do not mirror the profile of those who are knowledgeable about national politics.

How Do You Say No?, Emily Ford

Library Faculty and Staff Publications and Presentations

The article discusses ways on how to say a "no." It states that a person's ability to say "no" to taking a new project at work or another appointment affects the mental wellness and healthy work or life balance. William Ury, author of the book "The Power of a Positive No" argues that positive "no" affirms an individual's values and sends clear communication with others. It also provides various experiences of the other workers of how they approach in saying "no."

Gain Guiding In Large-Core Bragg Fibers, Xianyu Ao, Tsing-Hua Her, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

We theoretically analyze gain guiding in large-core Bragg fibers, to be used for large-mode-area laser amplifiers with single-transverse-mode operation. The signal is gain-guided in a low-index core, whereas the pump is guided by the photonic bandgap of the Bragg cladding to achieve good confinement. The high-index layers in the Bragg cladding are half-wave thick at the signal wavelength in order to eliminate Bragg reflection, reducing the Bragg fiber effectively to a step-index fiber for gain guiding.

Bringing Librarianship Back Home: Information Literacy As A Return To Method, Kimberly A. Jones

Communications in Information Literacy

Information literacy (IL) has arisen as a response to the reification of information. As information has been commodified, it has lost its fluidity as a term and an idea. Librarianship, as a result, has lost its footing, its philosophy. IL seeks to restore method to librarianship and, as a result, return subjectivity to information.

Surveying Libraries To Identify Best Practices For A Menu Approach For Library Instruction Requests, Candice Benjes-Small, Jennifer L. Dorner, Robert Schroeder

Communications in Information Literacy

A challenging situation has developed in regards to library instruction. With increases in both the quantity of information and the variety of information technologies being made available to researchers, the information literacy landscape is getting more complex. Simultaneously, the time allotted for library instruction is remaining essentially the same. In order to market the breadth of content available for library instruction sessions and to promote collaboration between librarians and teaching faculty in order to create optimal instruction sessions an 'a la carte menu' approach to library instruction requests was adopted by Radford University in 2004. Since the late 1990s a …

Teaching Matters: U.S. Government Information And Information Literacy: A Time-Sensitive Issue For Our Profession, Patrick P. Ragains

Communications in Information Literacy

No abstract provided.

Conference Report: 5th Annual Georgia Conference On Information Literacy, Rebecca Ziegler, Mark Lewis Richardson

Communications in Information Literacy

The 5th annual Georgia Conference on Information Literacy took place in Savannah, Georgia on October 3-4, 2008. Since its inception, this conference has drawn participants from across the United States and even a few from abroad. Jointly sponsored by the Zach S. Henderson Library, the Department of Writing and Linguistics, the College of Education, and the Center for Continuing Education at Georgia Southern University, the conference offers both theoretical and practical discussions of the complex issues involved in teaching students how to find, interpret and use information in emerging electronic technologies against the backdrop of one of America's loveliest cities.

Exploring Wikis In A Library Credit Course, Vivien Elizabeth Zazzau

Communications in Information Literacy

Wiki is a type of software (also known as social software) that enables its users to create a website with only a minor knowledge of html. Many universities, schools, businesses, and libraries are currently using wiki software to great effect. Even so, there is very little literature addressing the use of wiki software in the university library instruction classroom. This report will focus on the use of wiki software in a university library instruction classroom and consider its feasibility as a tool for teaching critical thinking through team-based learning.

Advancing The Promotion Of Information Literacy Through Peer-Led Learning, Tamsin Bolton, Tina Pugliese, Jill Singleton-Jackson

Communications in Information Literacy

Two new courses at the University of Windsor are opening the door to thinking about information literacy and curricular integration in very different ways. The courses, Ways of Knowing and Mentorship & Learning, were originally designed to help with retention and transition issues. They were also founded on the concept of peer-led learning at the university level. In this model students are able to connect with their peers in an organic way that is not always possible with faculty and librarians. It did not take long to see the potential in using peer mentors as potential conduits in the transfer …