Digital Commons Network^™

Advances In Autonomous-Underwater-Vehicle Based Passive Bottom-Loss Estimation By Processing Of Marine Ambient Noise, Lanfranco Muzi

Dissertations and Theses

Accurate modeling of acoustic propagation in the ocean waveguide is important to SONAR-performance prediction, and requires, particularly in shallow water environments, characterizing the bottom reflection loss with a precision that databank-based modeling cannot achieve. Recent advances in the technology of autonomous underwater vehicles (AUV) make it possible to envision a survey system for seabed characterization composed of a short array mounted on a small AUV. The bottom power reflection coefficient (and the related reflection loss) can be estimated passively by beamforming the naturally occurring marine ambient-noise acoustic field recorded by a vertical line array of hydrophones. However, the reduced array …

Beyond Fruit: Examining Community In A Community Orchard, Emily Jane Becker

Dissertations and Theses

The Fruits of Diversity Community Orchard, located in Portland, Oregon in an affordable housing neighborhood, is a site of alternative food provisioning in which a group of people, organized by two nonprofits, work together to manage fruit and nut producing plants. Through conversations with volunteers who participate regularly and participant observation, this study explores the questions: What does community mean in the context of a community orchard? In what ways does partnering with a nonprofit from outside the neighborhood influence community and the way the project is operationalized?

This thesis situates community orchards within the literature on alternative food networks …

Language Policy And Bilingual Education For Immigrant Students At Public Schools In Japan, Naomi Asakura

Dissertations and Theses

This thesis discusses the current Japanese language (nihongo) education for immigrant students at public schools in Japan and provides recommendations through the study of language policy and the comparison of bilingual education in the United States. The current situation of a decreasing birth rate and increasing aging population in Japan has led to the acceptance of more foreign workers. Due to this change, language education in Japan has increasing development. The focus of chapter 1 is on the theories of language policy. This paper particularly focuses on the ideas of Wright (2004), Neustupný (2006), Spolsky (2004), and Cooper (1989), and …

A Town On Fire: The Copperfield Affair Of 1914, Daniel Joseph Shepard

Dissertations and Theses

In 1914, Copperfield, Oregon was militarily occupied by order of the governor, Oswald West. Its town government was deposed, the city officials were arrested, and the town's saloons were closed and all liquor and gambling devices were seized. The town, previous to Governor West's interdiction, had seen a breakdown into violence and arson between two competing saloon cliques. The resulting martial law of Copperfield and subsequent court battles between the governor and Copperfield's saloonkeepers would become known as the Copperfield Affair.

The purpose of this study is to explain how and why the Copperfield Affair happened. The event which precipitated …

Inspiring Action: Measuring The Effect Of Motivational Frames On Social Movement Mobilization, Rebecca Louise Smith

Dissertations and Theses

In order to probe how social movement messages foster participant mobilization, this study utilized an experimental design to investigate collective action frames, core messaging tasks that define problems, assign blame, convey a plan of action, and inspire participation. The study compared the effects of climate change messages that contain motivational frames with those that do not, incorporating the influence of resonance, and exposure to competing and counter frames. Results revealed that motivational frames contributed to mobilization, especially intention to act, under conditions of resonance and with exposure to counter frames. Salience primed participants to respond to motivational frames, however for …

A Critical Race Analysis Of Travel For Transformation: Pedagogy For The Privileged Or Vehicle For Socio-Cultural Transformation?, James Arthur Gambrell

Dissertations and Theses

Transformative learning theory (TLT) describes the process of reframing discriminative, untenable worldviews with a more inclusive, permeable, and reflective epistemology. Although TLT has been around for more than 50 years, few studies empirically engage critical theoretical frameworks to move beyond personal learning to identify the impacts of transformation on society. Through a critical race theory (CRT) framework, this study analyzed how the participants' socio-cultural identities (race, class, gender, sexuality, and heritage language) impacted the transformative learning of eight study-abroad students from a medium-sized, rural Midwestern university. Focusing on the extent to which the participants experienced the elements of transformative …

Naturally Occurring Background Levels Of Arsenic In The Soils Of Southwestern Oregon, Heather Ann Hurtado

Dissertations and Theses

This study examines the natural background concentrations of arsenic in the soils of southwest Oregon, using new samples in addition to data collected from previous theses (Khandoker, 1997 and Douglas, 1999). The original 213 samples were run by ICP-AES with a reporting limit of 20 ppm, and only three samples had detected values. The original samples were tested again (2013) at a lower reporting limit of 0.2 ppm by ICP-MS, as were 42 new samples (2013), to better ascertain the natural levels of arsenic in undisturbed soils. The aim is to add to the existing DEQ data set, which has …

Focus On A Stem, Based In Place, Watershed Curriculum: A Confluence Of Stormwater, Humans, Knowledge, Attitudes, And Skills, Lecia Molineux Schall

Dissertations and Theses

This case study investigated the potential of a place-based watershed curriculum, using STEM principles, to increase watershed literacy and knowledge of human impacts on stormwater in the environment. A secondary goal was to examine whether the place-based connection and increased exposure to issues within their local watershed impacted the students' environmental attitudes and sense of place. Over 500 sixth graders participated in this localized curriculum, where they learned the science behind watershed issues on their own school campuses. They focused on ways humans can monitor and mitigate their impacts on stormwater, through engineering investigations. The mixed-method research study investigated the …

Localized Ecological And Educational Effects Of Environmental Service-Learning In Portland, Oregon, Steven Matthew Braun

Dissertations and Theses

Environmental service-learning is an intentional educational experience(s) wherein learners engage in meaningful activities designed to serve the environment. Environmental service-learning activities vary according to their learning and service goals and include ecomanagement, persuasion, legal action, economic action and political action. The purpose of this mixed methods research was to explore the ecological and educational impacts of grades 6-12 environmental education, with special attention to environmental service-learning throughout Portland, Oregon.

Ecological impacts considered restoration and conservation outcomes of several environmental service-learning programs including plant communities, soils, litter removal and trail maintenance. Educational outcomes considered aspects of environmental literacy including locus of …

Democratizing The City Through The Colonization Of Public Space: A Case Study Of Portland Food Not Bombs, Trent Adam Saari

Dissertations and Theses

The implementation of neoliberal economic and political policies is often touted as a way to increase overall individual well-being and freedom. While these policies may benefit those already wielding economic security and political power, marginalized populations often bear the negative cost associated with such policies. As deregulation and privatization increases, social safety nets and social spending are dramatically reduced. At the local level, liberalization has resulted in increased surveillance and regulation of public space. Organized resistance to global corporatization and increased economic and political marginalization has occurred across the globe. Resisting neoliberalism is complex as the adaptability of the state …

Building Social Sustainability From The Ground Up: The Contested Social Dimension Of Sustainability In Neighborhood-Scale Urban Regeneration In Portland, Copenhagen, And Nagoya, Jacklyn Nicole Kohon

Dissertations and Theses

In response to growing social inequality, environmental crises, and economic instability, sustainability discourse has become the dominant "master signifier" for many fields, particularly the field of urban planning. However, in practice many sustainability methods overemphasize technological and economic growth-oriented solutions while underemphasizing the social dimension. The social dimension of sustainability remains a "concept in chaos" drawing little agreement on definitions, domains, and indicators for addressing the social challenges of urban life. In contrast, while the field of public health, with its emphasis on social justice principles, has made significant strides in framing and developing interventions to target the social determinants …

Discursive Security: F.B.I. Stings And The Nature Of Peace, Adam Testerman

Dissertations and Theses

The current study utilizes Critical Discourse Analysis and Thematic Analysis to study newspaper coverage of F.B.I. sting operations in The New York Times, Washington Post, and USA Today. F.B.I. sting operations are a modern counter-terrorism policy designed to preempt acts of terrorism. This study develops a theoretical approach to understanding F.B.I. sting operations by reviewing the critique of security. The critique of security suggests that nations construct threats in order to produce and maintain ideological and practical hegemony. Thematic categories of the newspaper discourse are formulated and analyzed in the context of security. The study employs aspects of grounded theory …

Combining Systems Methodologies To Reduce Allergen-Related Food Recalls, Jill Marie Sweney

Dissertations and Theses

The risk of poor food safety is a major focus for managers in the food manufacturing industry. Despite industry-led and regulatory efforts to improve the overall food safety of US packaged consumer foods, product recalls and market withdrawals are increasing. This is especially true for the most frequent cause for food recall: the undeclared allergen. With industry trends leaning toward adoption of third-party food safety management certifications, a popular food safety code from the Safe Quality Foods Institute is evaluated using Systems Analysis. Three changes to the food safety code are proposed to address three of the top causes for …

Developing Key Sustainability Competencies Through Real-World Learning Experiences: Evaluating Community Environmental Services, Erin Lorene Anderson

Dissertations and Theses

This study focuses on sustainability in higher education and the competencies essential to address sustainability issues. Because sustainability issues are complex, "wicked", and dynamic, sustainability education programs need to reflect the interdisciplinary and collaborative nature of the field. Graduates who are competent in sustainability research and problem solving will have the knowledge, skills, and attitude necessary to analyze a sustainability problem systemically and comprehensively, then will construct and implement interventions to reach optimal sustainability solutions. To prepare graduates, sustainability education programs should facilitate the development of key sustainability competencies (Wiek, Withycombe, & Redman, 2011). Such programs provide an interdisciplinary approach …

Landforms Along The Lower Columbia River And The Influence Of Humans, Charles Matthew Cannon

Dissertations and Theses

River systems, such as the Columbia River in the Pacific Northwest, USA have been influenced by human activities, resulting in changes to the physical processes that drive landform evolution. This work describes an inventory of landforms along the Columbia River estuary between the Pacific Ocean and Bonneville Dam in Oregon and Washington. Groupings of landforms are assigned to formative process regimes that are used to assess historical changes to floodplain features. The estuary was historically a complex system of channels with a floodplain dominated by extensive tidal wetlands in the lower reaches and backswamp lakes and wetlands in upper reaches. …

The Scales And Shapes Of Queer Women's Geographies: Mapping Private, Public And Cyber Spaces In Portland, Or, Paola Renata Saldaña

Dissertations and Theses

Queer women's relationship to space has been under-theorized due to the difficulties in identifying particular spatial patterns that can describe their presence in urban settings. Most of the research that has focused on queer space has mentioned the difficulty of mapping queer women. The purpose of this research is to identify the ways in which the scarcity of queer women-specific space in Portland, Oregon, has affected the development of a women's community based on a queer identity, the role of intersecting identities such as race and gender identity in these communities and spaces, as well as the implications of queer …

Energy Efficiency And Conservation Attitudes: An Exploration Of A Landscape Of Choices, Mersiha Spahic Mcclaren

Dissertations and Theses

This study explored energy-related attitudes and energy-saving behaviors that are no- or low-cost and relatively simple to perform. This study relied on two data sources: a longitudinal but cross-sectional survey of 4,102 U.S. residents (five biennial waves of this survey were conducted from 2002 to 2010) and a 2010 cross-sectional survey of 2,000 California residents. These two surveys contained data on two no- and low-cost behaviors: changing thermostat setting to save energy (no-cost behavior) and CFL installation behavior (low-cost behavior). In terms of attitudes, two attitudinal measures emerged from these data following a Cronbach's alpha and Confirmatory Factor Analysis (CFA): …

The Right To Dream: Assessing The Spatiality Of A Homeless Rest Site In Portland, Oregon, Stephen Przybylinski

Dissertations and Theses

The continued increase in homelessness in Portland, Oregon is in part a result of the systemic restructuring of the welfare state as well as a shift in local governance purviews. Primarily this has eradicated the affordable housing stock in the city which is compounded by the limited availability of emergency shelter spaces. These and other financial constraints have left a depleted service support system to cover a rising homelessness problem. In response to this, contemporary social movements have been focusing attention on economically marginalized groups such as the homeless, calling for rights to access resources in cities such as housing. …

"Microfinance As A Determinant Of Domestic Violence In Bangladesh: Who Is At Risk?", Alvin Christian

Dissertations and Theses

This paper examines the impact that microfinance participation has on reported domestic violence rates among women in Bangladesh. While microfinance programs are aimed at reducing poverty, they may have unintended consequence and contribute to domestic violence or Intimate Partner Violence (IPV). Using nationally representative data from the Urban Health Survey (2006), I study the association between microfinance participation and domestic violence among currently married women. The outcome variable is domestic violence, which is coded as a dummy variable, where a women either has experienced domestic violence episodes or she hasn’t. Predictor variables include microfinance participation, community attitudes, liberal views, labor …

Do Oil Economies In Sub-Sahara Africa, Rebecca Girma

Dissertations and Theses

The African continent provides majority of the world’s raw material for technology and fine jewelry. Countries dependent on their extractive industries lag behind on developmental goals. Their GDPs are high as well as their national poverty levels. This paper explores the factors in which a nation lacks development when it is financially wealthy to do so. There are similar patterns in nations where resource curse has occurred. What is the key to sustainable development in Sub-Saharan Africa? Is solving corruption and migrating away from a market dependent on primary exports the answer? Can they transition from the ancient patrimonial state …

Empirical Investigation Of Samhsa’S (Substance Abuse And Mental Health Services Administration) Model Of Wellness, Dipanjana Das

Dissertations and Theses

The quest to operationalize the construct of wellness has been elusive. Part of the difficulty resides in the way wellness has been conceptualized in the literature, using different non-overlapping models. Another drawback is that many existing models are not based on solid empirical evidence. The current study addressed these limitations by assessing the empirical validity of SAMHSA’s (Substance Abuse and Mental Health Services Administration) model of wellness. We created an instrument to assess wellness based on a thorough review of the literature that serves as the basis of the SAMHSA model that can be used to assess wellness. Findings revealed …

Is The Trans-Pacific Partnership A ‘Natural’ Trade Bloc?, Matthew Ziegler

Dissertations and Theses

The Trans-Pacific Partnership began as a free trade agreement between Brunei Darussalam, Chile, New Zealand and Singapore which was enacted in 2004. Since that time, additional countries have entered into formal negotiations to expand the trade bloc, including the USA, Mexico, Peru, Australia, Malaysia, Canada, Vietnam and Japan. This paper seeks to determine whether these countries represent a ‘natural’ trade partnership by comparing and contrasting the trade complementarity index between each pair of countries within the partnership and those other countries counted in the APEC 21 countries plus India, which is a member of the RCEP trade bloc.
Previous studies …

Effects Of Temperature Stress On Coral Fluorescence And Reflectance, Andrea Gomez

Dissertations and Theses

Around the world, climate change, land-based pollution and fishing impacts are recognized as principal threats to coral reef ecosystems. Sea surface temperatures, in particular, are expected to change dramatically over the next decades and result in high coral mortality in some regions. Through controlled experiments, I examined changes in coral fluorescence and reflectance in response to water temperature alterations to assess the potential of employing these signatures as a diagnostic tool to measure coral health. At the NOAA Coral Culture and Collaborative Research Facility, I conducted controlled laboratory-based heat stress experiments on three Caribbean species of coral: Acropora cervicornis, Orbicella …

"Model Complexity And Variable Selection In Maxent Niche Models: Analyses For Rodents In Madagascar", Peter Galante

Dissertations and Theses

Ecological niche models (ENMs) characterize the relationship between localities where a species is known to occur and the abiotic characteristics of these regions. While widely used, ENMs remain subject to several outstanding issues, including those related to model complexity and violation of modeling assumptions (e.g., representative sampling). Critical in resolving these issues is a better understanding of the effectiveness of model selection techniques. Here, I compare two strategies for optimizing ENMs: an information-criterion approach (AICc) and a sequential approach that assesses model performance on withheld data. I do so for a single species using two datasets, one with all available …

Food Imports As A Hindrance To Food Security And Sustainable Development: The Cases Of Nigeria And Senegal, Dioume Astou

Dissertations and Theses

Despite the growing global acceptance of an individual’s right to adequate food and nutrition, and the state’s obligation to ensure that all its citizens are free from hunger, 805 million or one in nine people around the world today are still chronically malnourished; the majority live in developing countries. African states have had a particular problem with food insecurity. Food security on the continent has worsened since the 1970s and by the end of the century, the population in Africa is

expected to be three times its current level. Hence, food insecurity in Africa will be much more severe than …

Degradation Of Carbon Tetrachloride Using Hydrophobic Green Rust, Sheena Bowman

Dissertations and Theses

Hydrophobic green rusts (GR) were produced using aerial oxidation of solutions containing bis (2-ethylhexyl) sulfosuccinate (BIS) and sodium N-lauroylsarcosinate (SNLS), iron (II) sulfate and sodium hydroxide. The synthesis was conduced at constant pH 8.0±0.1 for the duration of 1-3 hrs. Partition tests showed GRBIS and GRSNLS suspended in the organic phase (tetrachloroethylene). Through X-ray diffraction analysis both GRs exhibit similar patterns to Green Rust II, an inorganic form of GR. The kinetics of GR reductive dechlorination of carbon tetrachloride (CT) was investigated. CT at high concentrations was degraded at high percentages for GRBIS-3, 88.5% and GRSNLS-5, 97.6%. Their reactions were …

The Widespread Skink Mabuya Dorsivittata Reveals Complex Patterns Of Genetic Diversity In South America, Danielle Rivera

Dissertations and Theses

No abstract provided.

United States Multilateral Policy In Dealing With North Korea, Alex Guarino

Dissertations and Theses

No abstract provided.

World Bank, Agriculture And Policy: A Case Study In Ghana And Ethiopia, Steven Margel

Dissertations and Theses

This thesis tests the effectiveness of the World Bank’s agricultural-aid policy by examining case studies in Ghana and Ethiopia in the period of 2000-2010. Each study examines the policy context, project/program success, overall human development results, and threats to sustainability, of agricultural aid. The primary hypothesis of the paper is that participatory processes and inclusive institutions will prove to be decisive factors. Each case is tested against this political view of aid in addition to three additional images (Destructive, Ineffective, Effective Technical), in order to ensure a comprehensive review.

The Ghana case showed a lack of participation in forming the …

Intra- And Inter-Seasonal Variability Of Supra-Glacial 1 Streams And Lakes Over The West Greenland Ice Sheet 2 From High-Resolution Satellite Optical Data, Michael Gregory Brown

Dissertations and Theses

The Greenland ice sheet (GrIS) is one of the largest glacial ice masses on Earth, second only to the Antarctic ice sheet. The surface hydrology of the GrIS plays a crucial role on the surface energy and mass balance budgets of the ice sheet as a whole. Surface water, known as supra-glacial water, is seasonally found in the ablation zone and feeds the en-glacial and sub-glacial hydrological environments of the ice sheet. The spatial distribution of surface streams is poorly understood and their temporal variability is (to our knowledge) unknown. One of the reasons for the lack of knowledge on …