Digital Commons Network^™

Snowmelt Detection On Alpine Glaciers Using Synthetic Aperture Radar Time Series, Corey Scher

Dissertations and Theses

Hindu Kush Himalayan (HKH) glaciers serve as some of the most sensitive indicators of changes in global climate. These glaciers shape the hydrologic dynamics of river systems supplying freshwater to over 2 billion people throughout Asia and regulate the geochemistry of sensitive aquatic alpine ecosystems. As snowmelt onsets sooner, lasts longer, and snowfields retreat due to increases in global temperature, the hydrologic dynamics of catchments draining HKH threaten to change the availability of surface freshwater resources for nearly one fifth of the global population, disturb sensitive aquatic habitat, and precipitate hazards associated with glacier wasting. Informed planning and decision-making around …

"Dawn And Doom Was In The Branches": Eros Revisited In Zora Neale Hurston's Their Eyes Were Watching God, Fernando M. Duran

Dissertations and Theses

No abstract provided.

The Mediterranean Crisis, Zuzana Turakova

Dissertations and Theses

A massive European immigration crisis began in 2015, resulting in over a million people flooding into Europe, fleeing conflict and economic desperation. European countries felt threatened by this sudden influx of people who either looked different or practiced different religions, and this caused a major backlash in these predominantly Christian countries. Anti-immigrant fever has changed the political environment in Europe and as a result, most EU policies today focus on preventing migrants from reaching European borders. In this thesis, I argue that the paucity of knowledge and lack of preliminary communication and pre-warning on the scale of the Mediterranean crisis …

Senegal’S Unsustainable Economic Growth., Amadou Konteye

Dissertations and Theses

No abstract provided.

Understanding And Modeling Taxi Demand Using Time Series Models, Sabiheh Faghih

Dissertations and Theses

The spatio-temporal variations in demand for transportation, particularly taxis, are impacted by various factors such as commuting, weather, road work and closures, disruption in transit services, etc. Identifying the factors that influence taxi demand and understanding its dynamic provide planners with the information necessary to improve the transportation systems and also help drivers to reduce their vacant time.

This dissertation focuses on important factors affecting the demand. In the beginning, the impact of price changes on the demand is studied. Chapter One discusses how the seasonal effects and trends are removed from the demand, and then price elasticity for demand …

Characterizing Temperature Variability States Across Southern South America And Associated Synoptic-Scale Meteorological Patterns, Judah Adam Detzer

Dissertations and Theses

The aim of this thesis is to understand spatiotemporal temperature variability in southern South America by identifying overarching temperature variability states and their associated synoptic-scale meteorological patterns. Further, the temporal frequency of occurrence of those temperature variability states is investigated as is the role of recurrent low-frequency modes of climate variability (El Niño Southern Oscillation and the Southern Annular Mode) on temperature variability. K-means cluster analysis is used to group all months during the period 1980-2015 into four primary categories for summer and winter separately. Monthly maps of temperature anomalies are provided as input to the k-means algorithm and the …

Lone Wolves And Copycats: Assessing Policy And Infrastructure For Flood Hazard And Floodplain Management, Samantha L. Hamlin

Dissertations and Theses

To mitigate flood hazard, which affects millions of people every year, increasing numbers of communities are developing green infrastructure policies to not only mitigate the hazard, but to meet other community policy objectives, as green infrastructure is often cited for the multiple benefits it confers. To support the implementation of policies that help communities meet their policy objectives, however, it is imperative to understand how policy is innovated and adopted. To do so, I applied the internal determinants and regional diffusion models, what I refer to as the lone wolf and copycat models. In policy, a lone wolf innovates a …

Assessing Ppgis Usability And Its Relationship To Spatial Data Production: A Case Study, Timothy Michael Hitchins

Dissertations and Theses

Modern Geoweb-enabled PPGIS methodologies incorporate interactive map applications as the main driver for public engagement and data collection. However, little research explores exactly how the public interact with these applications to produce spatial data, a fact that contributes to criticisms of final data quality. Usability evaluation offers a solution for developing better PPGIS data production systems by identifying problems in the application interface for which the public engage. Drawing on a case study example of a PPGIS application developed to collect socio-spatial data from members of a random public, this paper addresses usability in a three-stage approach. First, controlled experimentation …

The Urban Food Desert As A Model For The Urban Health Care Desert: Fundamental Causes And Economic Considerations, Estevan A. Garcia

Dissertations and Theses

Introduction: A “health care desert” is a part of the country where needed medical, behavioral, mental, dental, and/or pharmaceutical health care services are extremely limited or altogether unavailable. This terminology is based on the concept of a “food desert,” which describes an area where people have limited access to affordable and healthy foods, and which, together with the negative health consequences of eating lower-quality foods, is well described in public health literature. The application of this terminology to an urban environment with ready access to transportation has been limited and is controversial. However, the recent increase in urban hospital closures …

Burden Of Lipohypertrophy Among Insulin Dependent Diabetes Mellitus Patients In China: An Analysis Of Outcomes And Impact Of Pen Needle Reimbursement Policy, Arthi Chandran

Dissertations and Theses

Background

Diabetes is a global epidemic and with an aging population accompanied by rapid urbanization China ranks highest in disease prevalence and associated burden. Independent of diabetes type, insulin is an eventual and costly requirement for disease management. The consequences of insulin administration however are poorly understood. Lipohypertrophy (LH) is one such consequence. It is hypothesized that method of insulin delivery and poor delivery technique are significant risk factors for this condition which is believed to alter insulin pharmacodynamics. Subsequently, insulin pen needles are a critical component of care however access to pen needles varies across China.

Objective

The objective …

How Can Community Engagement In The Local Past And Archaeological Research Be Mutually Beneficial? A Case Study In Community Archaeology From Sauvie Island, Oregon, Martin John Plumer

Dissertations and Theses

Community archaeology's broader objectives include increasing public understanding of archaeology and making archaeology more relevant to people's day to day lives. Fulfilling these goals could be beneficial to the public in terms of their gaining more agency in, and more access to, archaeology; and it could be beneficial to archaeologists in terms of increasing public support for archaeological work. While many community archaeologists report success, few authors critically evaluate the experience and outcomes of community archaeology. As a result, little data-based understanding exists about what is gained through community archaeology. This project explores that question through three primary means: 1) …

Examining The Spatial Characteristics Of Pluvial Flooding Through Citizen Science In Portland, Oregon, Katelyn Rachel Michelson

Dissertations and Theses

Pluvial flooding is caused by rainfall events that overwhelm drainage systems and do not allow excess water to be absorbed by soils or water infrastructure. This type of flooding occurs frequently in urban systems and leads to public inconveniences and infrastructure deterioration, which could cost more than fluvial flooding over time. Increased rainfall intensity, which is projected to increase with climate change, could result in increased pluvial flooding. This study aims to examine the vulnerability of pluvial flooding in Portland, OR (2010-2017) by incorporating an interdisciplinary framework that examines the physical and socioeconomic vulnerability of flooding through citizen-reported flooding data. …

Assessing Spatiotemporal Stream Temperature Trends And Drivers Through Integrated Longitudinal Thermal Profiling And Stationary Data Logger Methodology On The Upper Chehalis River, Wa, Whitney Vonada

Dissertations and Theses

This study encompasses 25 kilometers of the Chehalis River in Washington, USA that currently has sections under a Total Maximum Daily Load (TMDL) plan for stream temperature impairments that exceed 18°C, a regulatory standard set at the time of the listing to protect salmonid spawning, rearing, and migration. Using information integrated from stationary data loggers (n=22) that collected stream temperature information from August 4-September 10, 2017, and longitudinal thermal profiling performed on July 29-30, August 4-5, and September 9-10, 2017, this study aimed to quantify the spatial distribution of stream temperature, evaluate relative consistencies of the riverine thermal regime over …

Removing Dams, Constructing Science: Watershed Restoration Through A Socio-Eco-Technical Systems Lens, Zbigniew Jakub Grabowski

Dissertations and Theses

Ecological conservation and restoration in the anthropocene must struggle with overlapping drivers of biodiversity and cultural loss; ruptures of the ecological environment mirror ruptures of human relationships with nature. And yet technology cannot remove humans from nature; technological and infrastructural reconfigurations of nature create new vulnerabilities and risks for humans and ecosystems alike. How can conservation and restoration science productively grapple with complex infrastructure systems and decision-making processes as biophysical and social drivers of ecosystem change?

Using dam removals in the USA and in the Mid Columbia River region of the Pacific Northwest, this dissertation develops a conceptual framework for …

Quantifying Spatial Potential Access Equity In An Agent Based Simulation Model Of Buprenorphine Treatment Policy In The United States, Alexandra Elizabeth Nielsen

Dissertations and Theses

Opioid dependence and opioid related deaths are a public health problem which the United States Centers of Disease Control have declared an epidemic. While opioid agonist therapy for opioid addiction has been accepted as the most effective treatment for opioid dependence among academics, and office based buprenorphine treatment has been available in the Unites States for over 10 years, OB buprenorphine faces many barriers to widespread adoption. Empirical data on the geographic distribution of physicians able to prescribe buprenorphine and the prescribing patterns of those physicians show considerable unevenness in access and utilization of treatment services.

Federal-level policies have recently …

White Space, Black Space: Community Gardens In Portland, Oregon, David Ross Billings Jr.

Dissertations and Theses

Community gardens have been the focus of social science research in the United States for several decades and the benefits associated with these alternative food spaces has been well documented. More recently, scholars have begun to argue that these benefits are inequitably distributed across society. Largely as a result of the whiteness of these spaces, people of color are less represented in community and benefit less from their presence. Portland, Oregon is recognized as a leader in sustainability, with its abundance of community gardens and urban agriculture. It is also one of the whitest urban cities in the United States. …

Between A Rock And A Hot Place: Economic Development And Climate Change Adaptation In Vietnam, Khanh Katherine Pham

Dissertations and Theses

This thesis explores 1) the ways that three Vietnamese infrastructure development projects undermine their cities' climate change adaptation goals and 2) the political and economic forces driving these developments. In-depth interviews highlight four main perspectives of planners and decision makers, which explain why these infrastructure projects often undermine cities' climate resilience goals. I describe how the mainstream climate change adaptation planning approach, with its emphasis on participatory planning, good governance and green growth, implicitly reinforces the neoliberal growth model, even as it seeks to ameliorate the inequality and ecological destruction that such a growth model creates. My research reveals how …

Utilitarian Skateboarding: Insight Into An Emergent Mode Of Mobility, Michael Joseph Harpool

Dissertations and Theses

In recent years research and planning efforts to enhance the conditions and opportunities for active transportation modes have increased significantly; however, these efforts have primarily focused on pedestrians and bicyclists. Skateboarding and other alternative modes of mobility remain an untapped potential for healthy and sustainable travel. This research addresses numerous knowledge gaps in the literature on utilitarian skateboarding under the larger umbrella of active transportation. Analysis of online survey results and semi-structured interviews with skateboarders in Portland, OR provides insight into the motivations and barriers of traveling by skateboard and the demographics and perceptions of skateboard commuters. Like bicyclists and …

Impact Of Suburban Landscape Features On Gene Flow Of The Model Invasive Grass, Brachypodium Sylvaticum, Tina Marie Arredondo

Dissertations and Theses

Rapid range expansion of newly invasive species provides a unique opportunity for studying patterns of dispersal and gene flow. In this thesis, I examined the effect of landscape features on gene flow in the invasive grass Brachypodium sylvaticum at the edge of its expanding range. I used genome-wide Single Nucleotide Polymorphism (SNP) surveys of individuals from 22 locations in the Clackamas Watershed in the Portland, Oregon metropolitan region to assess genetic diversity and structure, to identify putative source populations, and to conduct landscape genetic analyses. Resistance surfaces were created for each landscape feature, using ResistanceGA to optimize resistance parameters. My …

Christians And Jerusalem In The Fourth Century Ce: A Study Of Eusebius Of Caesarea, Cyril Of Jerusalem, And The Bordeaux Pilgrim, Stephen David Green

Dissertations and Theses

This thesis addresses Constantine's developments of the Roman province of Palaestina. It analyzes two important Christian bishops, Eusebius of Caesarea and Cyril of Jerusalem, and one nameless Christian traveler, the Bordeaux pilgrim, to illuminate how fourth-century Christians understood these developments. This study examines the surviving writings of these Christian authors: the Bordeaux Itinerary, Cyril's Catechetical Lectures, and Eusebius's Ecclesiastical History, Onomasticon, Preparation of the Gospel, Proof of the Gospel, and the Life of Constantine, and the archaeological remains of several Constantinian basilicas to interpret their views of the imperial attentions that were being poured …

A Temperate And Wholesome Beverage: The Defense Of The American Beer Industry, 1880-1920, Lyndsay Danielle Smith

Dissertations and Theses

For decades prior to National Prohibition, the "liquor question" received attention from various temperance, prohibition, and liquor interest groups. Between 1880 and 1920, these groups gained public interest in their own way. The liquor interests defended their industries against politicians, religious leaders, and social reformers, but ultimately failed. While current historical scholarship links the different liquor industries together, the beer industry constantly worked to distinguish itself from other alcoholic beverages.

To counter threats from anti-alcohol groups, beer industry advocates presented their drink as a wholesome, pure, socially and culturally rich, and economically significant beverage that stood apart from other alcoholic …

Understanding Asean : An Alternative Approach To International Relations Theory In Asia, Ryan Grimstad Driver

Dissertations and Theses

The Association of Southeast Asian Nations (ASEAN) was originally formed in 1967 by five members as a means to promote peaceful relations and prevent the spread of communist influence within their sovereign states. Since then the regional organization has doubled in size and now includes communist states amongst its membership as it seeks to establish itself as a strong economic and political hub for the greater region as two large military powers, China and the United States, vie for hegemonic influence. The American presence in the region must be governed by a firm understanding of ASEAN's unique nature and goals. …

Assessment Of Observational Uncertainty In Extreme Precipitation Over The Continental United States, Emily Anne Slinskey

Dissertations and Theses

An extreme precipitation categorization scheme, developed to temporally and spatially visualize and track the multi-scale variability of extreme precipitation climatology, is introduced over the continental United States and used as the basis for an observational dataset intercomparison. The categorization scheme groups three-day precipitation totals exceeding 100 mm into five precipitation categories, or "P-Cats". To assess observational uncertainty across a range of precipitation measurement approaches, we compare in situ station data from the Global Historical Climatology Network-Daily (GHCN-D), satellite derived data from the Tropical Rainfall Measuring Mission (TRMM), gridded station data from the Parameter-elevation Regression on Independent Slopes Model (PRISM), global …

An Analysis Of The Bizx Commercial Trade Exchange: The Attitudes And Motivations Behind Its Use, Ján André Montoya

Dissertations and Theses

The Global Financial Crisis underscored both the complexity and brittleness of the global financial system, especially for small to medium enterprises dependent on the current banking regime for credit. More than ever, we have also begun to see the disentanglement of small businesses from traditional banks at the local and regional level in the form of CDFIs, fintech alternative lending, and now complementary currencies. Through interviews with the management and members of the BizX complementary currency this study asks what the attitudes and motivations are behind its offering and use. In addition, it inquires into the economic and psychological benefits …

Bilingual Teachers' Experiences: Being English Learners, Becoming Teachers, And Bilingual Education, Carrie Susan Larson

Dissertations and Theses

Bilingual students are the fastest growing demographic group in U.S. P-12 public schools and offer promise and hope to our increasingly global workforce. However, many bilingual students are lagging behind in school, too many do not complete high school, and their schooling experiences are overshadowed by racial and linguistic segregation, low-academic tracking, and subtractive educational experiences. There is a growing body of literature that recognizes the importance of bilingual and bicultural teachers and leaders who can include students' linguistic, cultural, and community assets in school. This qualitative research study explores the experiences of a specialized group of elementary bilingual and …

The Dispute Over The Commons: Seed And Food Sovereignty As Decommodification In Chiapas, Mexico, Carol Frances HernáNdez RodríGuez

Dissertations and Theses

Seeds have become one of the most contested resources in our society. Control over seeds has intensified under neoliberalism, and today four large multinational corporations control approximately 70 percent of the global seed market. In response to this concentration of corporate power, an international social movement has emerged around the concept of seed sovereignty, which reclaims seeds and biodiversity as commons and public goods. This study examines the relationship between the global dynamics of commodification and enclosure of seeds, and the seed sovereignty countermovement for decommodification. I approach this analysis through an ethnographic case study of one local seed sovereignty …

Incidence, Risk Factors, And Prediction Of Gastrointestinal And Intracranial Bleeding In A Cohort Of Older Veterans Prescribed Oral Anticoagulants, Angela Laurio

Dissertations and Theses

ABSTRACT

Incidence, Risk Factors, and Prediction of Gastrointestinal and

Intracranial Bleeding in a Cohort of Older Veterans Prescribed Oral Anticoagulants

by

Angela L. Laurio

Advisor: Marianne (Mimi) C. Fahs, PhD, MPH

Objectives:

The objectives of this dissertation were to: (1) describe and compare the incidence and odds of gastrointestinal and intracranial bleeding in veterans age 50 to 89 who were prescribed warfarin, direct oral anticoagulants, or no oral anticoagulants; (2) identify risk factors for gastrointestinal and intracranial bleeding among older veterans prescribed oral anticoagulants, and to calculate the relative risk of bleeding over time through time-to-event analysis; and (3) develop …

Making Room For Roses: The 1911 Relocation Of The Multnomah County Poor Farm, Kira Helene Lesley

Dissertations and Theses

From 1868 to 1911, the Multnomah County Poor Farm off Canyon Road in the Tualatin Hills housed indigent and sick residents of Portland and surrounding areas. In 1911, county officials relocated the Poor Farm from the West Hills flanking Portland to the far eastern portion of the county. Subsequently, the site hosted a municipal golf course and is currently home to the Oregon Zoo and Hoyt Arboretum. With no physical presence left, the original Poor Farm was quickly forgotten, and the reasons for its relocation have been obscured by the passage of time. Occasional references to the farm in newspapers …

Using The Syrian Civil War To Measure Hierarchy: Regional Power Transition In The Middle East, Eric Michael Clary

Dissertations and Theses

In 2018, the Syrian Civil War will enter into its ninth year of conflict. From an international relations perspective there are few, if any, studies on state actors in regional sub-state systems. What can an intrastate conflict teach us about future dynamics of the regional interstate hierarchy? It is worthwhile to examine The Syrian Civil War for three reasons. First, Syria lies in the heart of the Middle East lending proximity to regional actors. Second, the breakdown of order in Syria represents a microcosm of the global anarchic environment. Third, Syrian Civil War is an intrastate war that encapsulates both …

"Agglutinating" A Family: Friedrich Max MüLler And The Development Of The Turanian Language Family Theory In Nineteenth-Century European Linguistics And Other Human Sciences, Preetham Sridharan

Dissertations and Theses

Some linguists in the nineteenth century argued for the existence of a "Turanian" family of languages in Eastern Europe and Northern Asia, claiming the common descent of a vast range of languages like Hungarian, Finnish, Turkish, Mongol, Manchu, and their relatives and dialects. Of such linguists, Friedrich Max Müller (1823-1900) was an important developer and popularizer of a version of the Turanian theory across Europe, given his influence as a German-born Oxford professor in Victorian England from the 1850s onwards. Although this theory lost ground in academic linguistics from the mid twentieth century, a pan-nationalist movement pushing for the political …