Digital Commons Network^™

Spectrum Regrowth For Ofdm-Based Lte And Wimax Systems, Bosi Chen

Dissertations and Theses

An abstract of the thesis of Bosi Chen for the Master of Science in Electrical and Computer Engineering presented Aug 1st, 2012. Title: Spectrum Regrowth for OFDM-based LTE and WiMAX Systems. In OFDM-based (Orthogonal Frequency Dimension Multiplexing) LTE (Long Term Evolution) and WiMAX (Worldwide Interoperability for Microwave Access) Systems, one of the critical components is the RF power amplifier. With current technologies, RF power amplifiers are not perfectly linear. The nonlinearity of an RF power amplifier is one of the main concerns in RF power amplifier design. The nonlinearity control is described by the out-of-band power emission levels, and the …

Power Transition Theory And The Global Arms Trade: Exploring Constructs From Social Network Analysis, David Todd Kinsella

Political Science Faculty Publications and Presentations

Structural dimensions of the international system are key elements in power transition theory. Most theoretical applications to date have examined the distribution of power, and fluctuations in that distribution, as a precursor to global and regional warfare. Somewhat less attention has been paid to the coalitional structure of the international system in applied research. In this paper I suggest that certain concepts from power transition theory, including those that rely on information about alliance membership, might also be operationalized by examining the global arms trade using tools developed for social network analysis (SNA). I focus in particular on the SNA …

The Illicit Arms Trade In Asia: A Social Network Analysis, David Todd Kinsella

Political Science Faculty Publications and Presentations

In recent years, researchers have increasingly turned their attention to the proliferation of small arms and light weapons. Small arms are difficult to track and are not the stuff of military parades, but they are immensely destructive. In addition to what is already circulating, a substantial percentage of what is newly produced enters the black market and is destined for conflict zones across the globe. I argue that the illicit trade in small arms should be understood not as a market but as a network, one that shares some important properties with networked forms of organization studied by sociologists. I …

Patterns In Nature Forming Patterns In Minds : An Evaluation Of An Introductory Physics Unit, Christopher Ryan Sheaffer

Dissertations and Theses

Educators are increasingly focused on the process over the content. In science especially, teachers want students to understand the nature of science and investigation. The emergence of scientific inquiry and engineering design teaching methods have led to the development of new teaching and evaluation methods that concentrate on steps in a process rather than facts in a topic. Research supports the notion that an explicit focus on the scientific process can lead to student science knowledge gains. In response to new research and standards many teachers have been developing teaching methods that seem to work well in their classrooms, but …

A 40 Ghz Power Amplifier Using A Low Cost High Volume 0.15 Um Optical Lithography Phemt Process, Kenneth W. Mays

Dissertations and Theses

The demand for higher frequency applications is largely driven by bandwidth. The evolution of circuits in the microwave and millimeter frequency ranges always demands higher performance and lower cost as the technology and specification requirements evolve. Thus the development of new processes addressing higher frequencies and bandwidth requirements is essential to the growth of any semiconductor company participating in these markets. There exist processes which can perform in the higher frequency design space from a technical perspective. However, a cost effective solution must complement the technical merits for deployment. Thus a new 0.15 um optical lithography pHEMT process was developed …

Object Detection And Recognition In Natural Settings, George William Dittmar

Dissertations and Theses

Much research as of late has focused on biologically inspired vision models that are based on our understanding of how the visual cortex processes information. One prominent example of such a system is HMAX [17]. HMAX attempts to simulate the biological process for object recognition in cortex based on the model proposed by Hubel & Wiesel [10]. This thesis investigates the ability of an HMAX-like system (GLIMPSE [20]) to perform object-detection in cluttered natural scenes. I evaluate these results using the StreetScenes database from MIT [1, 8]. This thesis addresses three questions: (1) Can the GLIMPSE-based object detection system replicate …

Self-Disclosure And Self-Efficacy In Online Dating, Andrew Christopher España

Dissertations and Theses

This study explores online dating by studying the relationship between self-disclosure and self-efficacy in an online dating environment. This research study examines the way self-disclosure, self-efficacy, self-esteem, and gender interrelate in an online dating environment. This study includes, but is not limited to, discussion of the type of correlation between self-efficacy and self-esteem, the relationship between self-disclosure and self-efficacy, and the differences between men's and women's self-disclosure in an online dating environment. From conducting this study, the researcher was able to determine that there is a statistically significant relationship between gender and how it relates to self-disclosure and self-efficacy. With …

Urban Forest Justice And The Rights To Wild Foods, Medicines, And Materials In The City, Melissa R. Poe, Rebecca J. Mclain, Marla R. Emery, Patrick T. Hurley

Institute for Sustainable Solutions Publications and Presentations

Urban forests are multifunctional socio-ecological landscapes, yet some of their social benefits remain poorly understood. This paper draws on ethnographic evidence from Seattle, Washington to demonstrate that urban forests contain nontimber forest products that contribute a variety of wild foods, medicines, and materials for the wellbeing of urban residents. We show that gathering wild plants and fungi in urban forests is a persistent subsistence and livelihood practice that provides sociocultural and material benefits to city residents, and creates opportunities for connecting with nature and enhancing social ties. We suggest that an orientation toward human-nature interactions in cities that conceptualizes the …

From The Field: How Oregon Social Studies Teachers Are Preparing Students For The 21st Century, Gayle Y. Thieman, Kenneth T. Carano

Education Faculty Publications and Presentations

Much of the recent data on the state of social studies teaching has focused on the impact of NCLB on the decline of instructional time. The purpose of this study was to investigate the current status of K-12 social studies curriculum and instructional practice, as reported by classroom teachers. The survey investigated the impact of mandated testing, major goals and concepts, teachers’ instructional strategies, and technology integration. This paper presents findings from Oregon teachers with comparison to data from the 2010-2011 National Study on the State of Social Studies (S₄) and the content and skills advocated by the …

Bulletin: General Catalog Issue 2013-2014, Portland State University

Bulletin & Curriculum Change Documents

No abstract provided.

Making Sense Of Human Ecology Mapping: An Overview Of Approaches To Integrating Socio-Spatial Data Into Environmental Planning, Rebecca J. Mclain, Melissa R. Poe, Kelly Biedenweg, Lee Cerveny, Diane Besser, Dale Blahna

Institute for Sustainable Solutions Publications and Presentations

Ecosystem-based planning and management have stimulated the need to gather sociocultural values and human uses of land in formats accessible to diverse planners and researchers. Human Ecology Mapping (HEM) approaches offer promising spatial data gathering and analytical tools, while also addressing important questions about human-landscape connections. This article reviews and compares the characteristics of three HEM approaches that are increasingly used in natural resource management contexts, each focused on a particular aspect of human-environmental interactions. These aspects include tenure and resource use (TRU), local ecological knowledge (LEK), and sense of place (SOP). We discuss their origins, provide examples of their …

Past Tense, 2013, Retired Association Of Portland State

Past Tense columns of the RAPS Sheet

January, 2013 "A Tribute from 1955"

February, 2013 "Remembering our PSU Women's Association"

March, 2013 "RAPS, the Campus Traveler"

April, 2013 "Early Leadership at Portland State College"

May, 2013 "The Beginning: Geology at Portland State"

June, 2013 "Launching Study Abroad at Portland State"

September, 2013 "We Celebrate a Half Century of RAPS at PSU!"

October, 2013 "Celebrating the History of RAPS"

November, 2013 "PSU Football Players Make the Pros"

December, 2013 "PSU's Chamber Choir Has Been Singing Since 1975"

Functional Analysis And Operations Review Of The Oregon Department Of Education, Masami Nishishiba, Shannon Grzybowski, Andrew Dzeguze

Center for Public Service Publications and Reports

In November 2012, the Oregon Department of Education (ODE) entered into an Intergovernmental Agreement with Portland State University’s (PSU) Center for Public Service (CPS). This agreement outlines the scope of work for CPS to perform a Functional Analysis and Operations Review of ODE. The Scope of Work includes:

1. Conduct interviews with key ODE personnel, Oregon Department of Justice (DOJ) legal advisors, Oregon Department of Administrative Services (DAS) staff, and education community key stakeholders. Interviews will be used to determine the extent to which existing ODE personnel have the understanding and tools needed to effectively perform their jobs consistent with …

Educating For The Twenty-First Century, Judith A. Ramaley

Public Administration Faculty Publications and Presentations

In his first inaugural speech, President Obama declared that "our schools fail too many" and an essential component of laying "a new foundation for growth" will be "to transform our schools and colleges and universities to meet the demands of a new age. " Concerns about our nation s position in the global education race have led to a focus on college completion. Policymakers and foundations are setting goals for degree completion and are pressing colleges and universities to shorten the degree programs offered, address the barriers to degree attainment, rethink how best to help underprepared students be successful in …

The Value And Propriety Of Reintroduction As A Conservation Tool For Rare Plants, Edward O. Guerrant Jr.

Environmental Science and Management Faculty Publications and Presentations

Three recent reviews of reintroduction for conservation purposes, which draw on substantial and largely non-overlapping data sets, have come to strikingly different conclusions about its value. One concludes that “reintroduction is generally unlikely to be a successful conservation strategy as currently conducted.” Another that “…this review cannot conclusively comment on the effectiveness of re-introductions…” The third concludes there is “strong evidence in support of the notion that reintroduction, especially in combination with ex situ conservation, is a tool that can go a long way toward meeting the needs it was intended to address.” The argument over the conservation value of …

Impacts Of Predicted Global Sea-Level Rise On Oregon Beaches And Tidelands, Curt D. Peterson

Geology Faculty Publications and Presentations

Forward by:

Phillip Johnson, Executive Director Oregon Shores Conservation Coalition

The Oregon Shores Conservation Coalition’s "Coastal Climate Change Adaptation Project" is under development as an experiment in grassroots organizing for adaptive planning for expected climate change impacts. Oregon Shores is a regional conservation group with a 40-year history of working to protect marine, shoreline, estuarine and other coastal habitats. The organization’s board and staff came to recognize that the likely effects of climate change—rising sea levels, more intensive storm surges, increased erosion, lower-river flooding, among others—would affect every aspect of the group’s work. Consequently, a new program, the Climate Action …

Topographic Signatures And A General Transport Law For Deep-Seated Landslides In A Landscape Evolution Model, Adam M. Booth, Joshua J. Roering, Alan W. Rempel

Geology Faculty Publications and Presentations

A fundamental goal of studying earth surface processes is to disentangle the complex web of interactions among baselevel, tectonics, climate, and rock properties that generate characteristic landforms. Mechanistic geomorphic transport laws can quantitatively address this goal, but no widely accepted law for landslides exists. Here we propose a transport law for deep-seated landslides in weathered bedrock and demonstrate its utility using a two-dimensional numerical landscape evolution model informed by study areas in the Waipaoa catchment, New Zealand, and the Eel River catchment, California. We define a non-dimensional landslide number, which is the ratio of the horizontal landslide flux to the …

Strain Energy Release From The 2011 9.0 Mw Tōhoku Earthquake, Japan, Kenneth M. Cruikshank, Curt D. Peterson

Geology Faculty Publications and Presentations

The purpose of this paper is to compare the strain energy released due to elastic rebound of the crust from the tragic 2011 9.0 Mw Tōhoku earthquake in Japan with the observed radiated seismic energy. The strain energy was calculated by analyzing coseismic displacements of 1024 GPS stations of the Japanese GEONET network. The value of energy released from the analysis is 1.75 × 1017 J, which is of the same order of magnitude as the USGS-observed radiated seismic energy of 1.9 × 1017 Nm (J). The strain energy method is independent of seismic methods for determining the energy released …

Development Of Dynamic Thermal Performance Metrics For Eco-Roof Systems, Seth Sinclair Moody

Dissertations and Theses

In order to obtain credit for an eco-roof in building energy load calculations the steady state and time-varying thermal properties (thermal mass with evapotranspiration) must be fully understood. The following study presents results of experimentation and modeling in an effort to develop dynamic thermal mass performance metrics for eco-roof systems. The work is focused on understanding the thermal parameters (foliage & soil) of an eco-roof, further validation of the EnergyPlus Green Roof Module and development of a standardized metric for assessing the time-varying thermal benefits of eco-roof systems that can be applied across building types and climate zones. Eco-roof foliage, …

The Common Core Of A Toothache: Envisioning A Pedagogy Of Renewal And Contemplation, David Lee Keiser

Northwest Journal of Teacher Education

In this article, the author makes a case for the metaphor of “Sea Mind” as seen through the lens of pedagogy and describes the importance of his perspective for teaching and teacher education. As a teacher educator who has engaged both educational and contemplative work, his essay introduces the concept of a Sea Mind’s relationship to contemplative teaching and explores the challenge of maintaining healthy selves in a raging river of highstakes testing and test preparation and the rough waters of public school reform.

A Transformation-Based Approach To Implication Of Gste Assertion Graphs, Gouwu Yang, William N. N. Hung, Xiaoyu Song, Wensheng Guo

Electrical and Computer Engineering Faculty Publications and Presentations

Generalized symbolic trajectory evaluation (GSTE) is a model checking approach and has successfully demonstrated its powerful capacity in formal verification of VLSI systems. GSTE is an extension of symbolic trajectory evaluation (STE) to the model checking of -regular properties. It is an alternative to classical model checking algorithms where properties are specified as finite-state automata. In GSTE, properties are specified as assertion graphs, which are labeled directed graphs where each edge is labeled with two labeling functions: antecedent and consequent. In this paper, we show the complement relation between GSTE assertion graphs and finite-state automata with the expressiveness of regular …

Developing And Assessing Curriculum On The Physics Of Medical Instruments, Warren Christensen, James K. Johnson, Grace R. Van Ness, Elliot E. Mylott, Justin C. Dunlap, Elizabeth A. Anderson, Ralf Widenhorn

Physics Faculty Publications and Presentations

Undergraduate educational settings often struggle to provide students with authentic biologically or medically relevant situations and problems that simultaneously improve their understanding of physics. Through exercises and laboratory activities developed in an elective Physics in Biomedicine course for upper-level biology or pre–health majors at Portland State University, we aim to teach fundamental physical concepts, such as light absorption and emission and atomic energy levels, through analysis of biological systems and medical devices. The activities address the properties of electromagnetic waves as they relate to the interaction with biological tissue and make links between physics and biomedical applications such as microscopy …

Positive Matrix Factorization Of Pm2.5 - Eliminating The Effects Of Gas/Particle Partitioning Of Semivolatile Organic Compounds, Mingjie Xie, Kelley Barsanti, Michael P. Hannigan, Steven J. Dutton, Sverre Vedal

Civil and Environmental Engineering Faculty Publications and Presentations

Gas-phase concentrations of semi-volatile organic compounds (SVOCs) were calculated from gas/particle (G/P) partitioning theory using their measured particle-phase concentrations. The particle-phase data were obtained from an existing filter measurement campaign (27 January 2003-2 October 2005) as a part of the Denver Aerosol Sources and Health (DASH) study, including 970 observations of 71 SVOCs (Xie et al., 2013). In each compound class of SVOCs, the lighter species (e.g. docosane in n-alkanes, fluoranthene in PAHs) had higher total concentrations (gas + particle phase) and lower particle-phase fractions. The total SVOC concentrations were analyzed using positive matrix factorization (PMF). Then the results were …

On Continuously Defective Elastic Crystals, Marek Elźanowski, Serge Preston

Mathematics and Statistics Faculty Publications and Presentations

We analyze mathematical underpinnings of Davini's theory of defective crystals when the defectiveness of a kinematic state may be material point dependent. We show how the underlying space can be identified with a suitably chosen homogeneous space and how the uniformly defective structure is just a special case.

Incorporating Value Judgment In Technology Forecasting Using Data Envelopment Analysis, Dong-Joon Lim, Timothy R. Anderson

Engineering and Technology Management Faculty Publications and Presentations

Technology Forecasting using Data Envelopment Analysis (TFDEA) has been employed to a wide range of applications because of its ability to model complex tradeoffs. The very name indicates that it is based on Data Envelopment Analysis (DEA) which has strength that it doesn?t require fixed a priori weighting scheme. Instead, it adopts dynamic weighting scheme that each data point can choose their best possible weights. However, it is well known that this flexibility may result in extreme weights that may be considered unrealistic in certain applications and has been one subject of DEA researches. This paper extends the standard TFDEA …

Modules And Dialects As Objects In Grace, Michael Homer, James Noble, Kim B. Bruce, Andrew P. Black

Computer Science Faculty Publications and Presentations

Grace is a gradually typed, object-oriented language for use in education; consonant with that use, we have tried to keep Grace as simple and straightforward as possible. Grace needs a module system for several reasons: to teach students about modular program design, to organise large programs, especially its self-hosted implementation, to provide access to resources defined in other languages, and to support different “dialects”—language subsets, or domain specific languages, for particular parts of the curriculum. Grace already has several organising constructs; this paper describes how Grace uses two of them, objects and lexical scope, to provide modules and dialects.

The Grace Programming Language Draft Specification Version 0.3.1261, Andrew P. Black, Kim B. Bruce, James Noble

Computer Science Faculty Publications and Presentations

This is a specification of the Grace Programming Language. This specification is notably incomplete, and everything is subject to change.

On The Role Of Shape Prototypes In Hierarchical Models Of Vision, Michael David Thomure, Melanie Mitchell, Garrett T. Kenyon

Computer Science Faculty Publications and Presentations

We investigate the role of learned shape-prototypes in an influential family of hierarchical neural-network models of vision. Central to these networks’ design is a dictionary of learned shapes, which are meant to respond to discriminative visual patterns in the input. While higher-level features based on such learned prototypes have been cited as key for viewpointinvariant object-recognition in these models [1], [2], we show that high performance on invariant object-recognition tasks can be obtained by using a simple set of unlearned, “shape-free” features. This behavior is robust to the size of the network. These results call into question the roles of …

The Problem Of Semantics In The Metadata Mess, Veronika Margaret Megler, David Maier

Computer Science Faculty Publications and Presentations

This presentation addresses problems related to the volume of available scientific data, and its accessibility or inaccessibility to researchers who seek it. Topics addressed include metadata and reducing semantic diversity, especially as they refer to geospatial and other architectures

Taming The Metadata Mess, Veronika Margaret Megler

Computer Science Faculty Publications and Presentations

The rapid growth of scientific data shows no sign of abating. This growth has led to a new problem: with so much scientific data at hand, stored in thousands of datasets, how can scientists find the datasets most relevant to their research interests? We have addressed this problem by adapting Information Retrieval techniques, developed for searching text documents, into the world of (primarily numeric) scientific data. We propose an approach that uses a blend of automated and “semi-curated” methods to extract metadata from large archives of scientific data, then evaluates ranked searches over this metadata. We describe a challenge identified …