Digital Commons Network^™

The Use Of Effective Risk Management In Cloud Computing Projects, Usha Kiran Marichetty

Dissertations and Theses

Project management is one of the most important procedures that promote delivery of services. Examples of such projects include cloud computing projects. Despite the potential benefits associated with cloud computing projects, there are a number of security risks that when not properly managed, can always lead into the organization suffering major loses. In the adoption of cloud computing systems, project managers should have secure and well-configured platforms to reduce and control risks associated with cloud computing systems. There is a need for adopting the best risk management tools, techniques, and operations to achieve the desired results in the process of …

Framing Homelessness As Crisis: A Comparative Content Analysis Of Local Media Reports On Portland's Tent Cities, Katrien Cokeley

Dissertations and Theses

This content analysis of mainstream and alternative news narratives interprets the use of the crisis media frame, and describes the relationship between local policy initiatives, media discourse and public opinion on tent cities, organized by people experiencing homelessness in Portland, Oregon. Framing homelessness and housing as a crisis intensified the public debate, attested by an increase in mainstream media reports on tent cities, and by controversial policy changes that addressed the individually-experienced traumatic impacts of the City's anti-camping ordinance, as well as the systemic lack of affordable housing and emergency shelter. Media discourse related to city-sanctioned tent cities blurs the …

Controlling Water Exchange Kinetics And Improving Paracest Imaging, Jacqueline R. Slack

Dissertations and Theses

Generating MR image contrast from exogenous contrast media through chemical exchange saturation transfer (CEST) offers several exciting new possibilities, such as multicolored imaging, the interleaving of pre- and post-contrast images, and the potential to perform ratiometric metabolic imaging. The major limitation of the deployment of CEST imaging is the comparatively high detection limits of exogenous agents and particularly at the low B_¹ power levels required to meet SAR requirements. The large chemical shifts afforded by paramagnetic (paraCEST) agents permit more rapid exchange kinetics and therefore potentially more effective contrast agents. Despite comparatively large chemical shifts, many Ln³⁺ DOTA-tetraamide …

Improved Scoring Models For Semantic Image Retrieval Using Scene Graphs, Erik Timothy Conser

Dissertations and Theses

Image retrieval via a structured query is explored in Johnson, et al. [7]. The query is structured as a scene graph and a graphical model is generated from the scene graph's object, attribute, and relationship structure. Inference is performed on the graphical model with candidate images and the energy results are used to rank the best matches. In [7], scene graph objects that are not in the set of recognized objects are not represented in the graphical model. This work proposes and tests two approaches for modeling the unrecognized objects in order to leverage the attribute and relationship models to …

Refining Bounding-Box Regression For Object Localization, Naomi Lynn Dickerson

Dissertations and Theses

For the last several years, convolutional neural network (CNN) based object detection systems have used a regression technique to predict improved object bounding boxes based on an initial proposal using low-level image features extracted from the CNN. In spite of its prevalence, there is little critical analysis of bounding-box regression or in-depth performance evaluation. This thesis surveys an array of techniques and parameter settings in order to further optimize bounding-box regression and provide guidance for its implementation. I refute a claim regarding training procedure, and demonstrate the effectiveness of using principal component analysis to handle unwieldy numbers of features produced …

Uncovering Coxiella Burnetii'S Pathogenicity By Elucidating Its Metabolism And Host Interactions, Jess Annai Millar

Dissertations and Theses

Coxiella burnetii, the etiologic agent of acute Q fever and chronic endocarditis, has a unique biphasic life cycle, which includes a metabolically active intracellular form that occupies a large lysosome-derived acidic vacuole. C. burnetii is the only bacterium known to thrive within such a hostile intracellular niche, and this ability is fundamental to its pathogenicity; however, very little is known about genes that facilitate Coxiella's intracellular growth. This lack of knowledge of Coxiella's basic biology and molecular pathogenesis is a critical barrier to developing more effective therapies.

In this study, we aimed to understand both bacterial and …

How Does A Next Generation Science Standard Aligned, Inquiry Based, Science Unit Impact Student Achievement Of Science Practices And Student Science Efficacy In An Elementary Classroom?, Kayla Lee Whittington

Dissertations and Theses

This study examined the impact of an inquiry based Next Generation Science Standard aligned science unit on elementary students' understanding and application of the eight Science and Engineering Practices and their relation in building student problem solving skills. The study involved 44 second grade students and three participating classroom teachers. The treatment consisted of a school district developed Second Grade Earth Science unit: What is happening to our playground? that was taught at the beginning of the school year. Quantitative results from a Likert type scale pre and post survey and from student content knowledge assessments showed growth in student …

Turbidity Dynamics During High-Flow Storm Events In The Clackamas River, Oregon 2006-2012, Micelis Clyde Doyle

Dissertations and Theses

Turbidity is a useful parameter that can be utilized to help understand the water quality in a river and is an expression of the optical properties of a liquid that cause light rays to be scattered and absorbed rather than transmitted in straight lines. A total of 41 storm events occurring during water years 2006-2012 were analyzed for this study. A hysteresis index (HI) was used to assess the difference in turbidity on the rising and falling limbs of a storm-hydrograph. The upstream Carter Bridge site exhibited a clockwise (C) hysteresis in 38 of 41 storm events and counter-clockwise (CC) …

Escalating Language At Traffic Stops: Two Case Studies, Jamalieh Haley

Dissertations and Theses

In recent years, the public has seen a rise in recorded footage of violent encounters between police and Black American citizens, partially due to technology such as cell phones, dash-cameras, and body-cameras. This linguistic study examines how these encounters get escalated to the point of violence by asking 1) what kind of directives were used, 2) how were they responded to, 3) how the directives contributed to escalation, and 4) how might power and authority have played a role. I use two case studies to analyze directives and their responses. Findings reveal that repetition of directives on the part of …

The 2016 Presidential Election: Demographic Transformation And Racial Backlash, Skyler Lillian Brocker-Knapp

Dissertations and Theses

Despite analysts' predictions and assertions prior to the 2016 presidential election, the Hispanic vote did not prove decisive. Donald Trump's victory elucidates a new electoral calculus, one that will be ruled simultaneously by changing demographics and the backlash against such change. While Hispanic voters largely supported Hillary Clinton, structural and individual impediments hinder their access to the voting booth and their turnout on election day. This thesis explores the reasons why the Hispanic electorate did not prove decisive in the 2016 presidential election. It further illuminates the changing Electoral College map, in which the Midwest and the Rustbelt are determined …

A Conservationist Takes Flight: The Early Career Of William Lovell Finley, 1887-1911, Carey Elizabeth Myles

Dissertations and Theses

William Lovell Finley was an American conservationist active in Oregon and California from 1894 to 1947. He was president of the Oregon Audubon Society and a field representative for the National Audubon Society. He also served as Oregon State Game Warden, State Biologist and as a Commissioner on the Oregon State Fish and Game Commission. He wrote for ornithology journals and popular magazines, was an early wildlife field photographer, and made wildlife films. This thesis examines the Finley's career from 1887 to 1911 to demonstrate how Finley, as a self-taught naturalist, forged a professional identity and became part of a …

Loanwords In Context: Lexical Borrowing From English To Japanese And Its Effects On Second-Language Vocabulary Acquisition, Andrew Michael Sowers

Dissertations and Theses

Research has shown that cognates between Japanese and English have the potential to be a valuable learning tool (Daulton, 2008). Yet little is known on how Japanese learners of English produce cognates in context. Recently, studies have argued that cognates can cause a surprisingly high number of syntactic errors in sentence writing activities with Japanese learners (Rogers, Webb, & Nakata, 2014; Masson, 2013). In the present study, I investigated how Japanese learners of English understood and used true cognates (words that have equivalent meanings in both languages) and non-true cognates (words where the Japanese meaning differs in various ways from …

Investigations Of Electronic Cigarette Chemistry: 1. Formation Pathways For Degradation Products Using Isotopic Labeling; And 2. Gas/Particle Partitioning Of Nicotine And Flavor Related Chemicals In Electronic Cigarette Fluids, Kilsun Kim

Dissertations and Theses

Use of electronic cigarettes (e-cigarettes) is rapidly growing around the world. E-cigarettes are commonly used as an alternative nicotine delivery system, and have been advocated as generating lower levels of harmful chemicals compared to conventional cigarettes. Cigarette smoke-like aerosols are generated when e-cigarettes heat e-liquids. The main components of e-cigarette liquids are propylene glycol (PG) and glycerol (GL) in a varying ratio, plus nicotine and flavor chemicals. Both PG and GL are considered safe to ingest in foods and beverages, but the toxicity of these chemicals in aerosols is unknown. Current studies of e-cigarettes have mainly focused on dehydration and …

Influence Of The Presidential Inaugural Address On Audience Perceptions Of Candidate Image And The State Of The Nation, Kyle Alexander Rush

Dissertations and Theses

This study asks whether and how the presidential inaugural address influences American audiences. The current study explores how the 2017 Presidential Inaugural Address of Donald Trump influences audiences. Two areas were studied: Candidate image and the state of the nation. I hypothesized that participants who watched the address would have different attitudes regarding candidate image and the state of the nation compared to non-viewers. I also hypothesized that viewers of the address who voted for Donald Trump would respond differently to candidate image and the state of the nation when compared with those who did not vote for Trump.

With …

Constraining The Holocene Extent Of The Northwest Meers Fault, Oklahoma Using High-Resolution Topography And Paleoseismic Trenching, Kristofer Tyler Hornsby

Dissertations and Theses

The Meers Fault (Oklahoma) is one of few seismogenic structures with Holocene surface expression in the stable continental region of North America. Only the ~37 km-long southeastern section of the ~55 km long Meers Fault is interpreted to be Holocene-active. The ~17 km-long northwestern section is considered to be Quaternary-active (pre-Holocene); however, its low-relief geomorphic expression and anthropogenic alteration have presented difficulties in evaluating the fault length and style of Holocene deformation. We reevaluate surface expression and earthquake timing of the northwestern portion of the Meers Fault to improve fault characterization, earthquake rupture models, and seismic hazard evaluations based on …

Compositional And Physical Gradients In The Magmas Of The Devine Canyon Tuff, Eastern Oregon: Constraints For Evolution Models Of Voluminous High-Silica Rhyolites, Shelby Lee Isom

Dissertations and Theses

Large-volume silicic ignimbrites erupt from reservoirs that vary in composition, temperature, volatile content and crystallinity. The 9.7 Ma Devine Canyon Tuff (DCT) of eastern Oregon is a large-volume (>250 km³), compositionally zoned and variably welded ignimbrite. The ignimbrite exhibits heterogeneous trace element compositions, variable volatile content and crystallinity. These observations were utilized in the investigation into the generation, accumulation and evolution of the magmas composing the DCT. Building off previous research, pumices were selected from the range of trace element compositions and analyzed with respect to crystallinity, mineral abundances and assemblages. The DCT displays a gradational trace …

Intraminority Support For And Participation In Race-Based Collective Action Movements: An Intersectional Perspective, Jaboa Shawntaé Lake

Dissertations and Theses

Due to high profile police shootings, collective action movements addressing racial bias in policing, such as the Black Lives Matter (BLM) movement, have come to the forefront of societal concern. Though these movements and actions directly address police use of force against Black people, a number of non-Black racial minority individuals and organizations have declared solidarity and joined in protests with BLM. This study takes an intersectional approach to examine racial intraminority attitudes (i.e., racial minorities' attitudes toward other racial minority outgroups) toward support for and participation in protests against police excessive use of force and the BLM movement, through …

Invertebrate Community Composition Across Inundation Regimes And Its Potential To Reduce Plant Stress, Inez Ilicia Lawson

Dissertations and Theses

Appreciation of the ecological and economic values associated with healthy salt marshes has led to a recent rise in the number of marshes that are being targeted for restoration by dike removal. The success of restoration is often measured by the return of marsh plants, though this overlooks a key component of salt marshes, that of the invertebrate community within marsh sediments. To evaluate the short-term recovery of these invertebrates, sediment cores were collected across an elevational gradient in a recent dike removal marsh, one and two years post removal, and a nearby reference marsh. Abundance, richness and diversity as …

Melting In The Mantle Wedge: Quantifying The Effects Of Crustal Morphology And Viscous Decoupling On Melt Production With Application To The Cascadia Subduction Zone, Jiaming Yang

Dissertations and Theses

Arc magmatism is sustained by the complex interactions between the subducting slab, the overriding plate, and the mantle wedge. Partial melting of mantle peridotite is achieved by fluid-induced flux melting and decompression melting due to upward flow. The distribution of melting is sensitive to temperature, the pattern of flow, and the pressure in the mantle wedge. The arc front is the surface manifestation of partial melting in the mantle wedge and is characterized by a narrow chain of active volcanoes that migrate in time. The conventional interpretation is that changes in slab dip angle lead to changes in the arc …

Urban Impacts To Forest Productivity, Soil Quality, And Canopy Structure In Forest Park, Portland, Oregon, Andrew David Addessi

Dissertations and Theses

Land use practices and exposure to low impact disturbances associated with an urban environment can alter forest structure and function. Past and ongoing research in Forest Park, a large urban forest in Portland, Oregon, suggests that mature mixed Douglas-fir (Psuedotsuga meziesii)-hardwood stands in the more urban end of the park lack a shade-tolerant conifer understory composed of the late successional conifer tree species, such western hemlock (Tsuga heterophylla) and western red-cedar (Thuja plicata). 5-year plot remeasurement data that characterizes productivity and mortality patterns did not show a strong relationship to urban proximity. Plot productivity …

Making Software, Making Regions: Labor Market Dualization, Segmentation, And Feminization In Austin, Portland And Seattle, Dillon Mahmoudi

Dissertations and Theses

Through mixed-methods research, this dissertation details the regionally variegated and place-specific software production processes in three second-tier US software regions. I focus on the relationship between different industrial, firm, and worker production configurations and broad-based economic development, prosperity, and inequality. I develop four main empirical findings.

First, I argue for a periodization of software production that tracks with changes in software laboring activity, software technologies, and wage-employment relationships. Through a GIS-based method, I use the IPUMS-USA to extensively measure the amount and type of software labor in industries across the US between 1970 and 2015. I map the uneven geography …

Detecting Change In Rainstorm Properties From 1977-2016 And Associated Future Flood Risks In Portland, Oregon, Alexis Kirsten Cooley

Dissertations and Theses

In response to increased greenhouse gases and global temperatures, changes to the hydrologic cycle are projected to occur and new precipitation characteristics are expected to emerge. The study of these characteristics is facilitated by common indices to measure precipitation and temperature developed by the Expert Team on Climate Change Detection and Indices (ETCCDI). These indices can be used to describe the likely consequences of climate change such as increased daily precipitation intensity (SDII) and heavier rainfall events (R95p). This study calculates a subset of these indices from observed and modelled precipitation data in Portland, Oregon. Five rainfall gages from a …

Gis Spatial Analysis Of Arctic Settlement Patterns: A Case Study In Northwest Alaska, Justin Andrew Junge

Dissertations and Theses

In northwest Alaska, archaeologists hypothesize that environmental variability was a major factor in both growing coastal population density, with large aggregated villages and large houses, between 1000 and 500 years ago (ya), and subsequent decreasing population density between 500 ya and the contact era. After 500 ya people are thought to have dispersed to smaller settlements with smaller house sizes in coastal areas, and perhaps, upriver. This settlement pattern was identified through research at four site locations over 30 years ago. The changing geographic distribution of sites, associated settlement size, and house size has not been examined in detail. A …

The Social Acceptance Of Community Solar: A Portland Case Study, Anne Weaver

Dissertations and Theses

Community solar is a renewable energy practice that's been adopted by multiple U.S. states and is being considered by many more, including the state of Oregon. A recent senate bill in Oregon, called the "Clean Electricity and Coal Transition Plan", includes a provision that directs the Oregon Public Utility Commission to establish a community solar program for investor-owned utilities by late 2017. Thus, energy consumers in Portland will be offered participation in community solar projects in the near future. Community solar is a mechanism that allows ratepayers to experience both the costs and benefits of solar energy while also helping …

Field Mapping Investigation And Geochemical Analysis Of Volcanic Units Within The Dinner Creek Tuff Eruptive Center, Malheur County, Eastern Oregon, Matthew Cruz

Dissertations and Theses

The Dinner Creek Tuff is a mid-Miocene rhyolitic to dacitic ignimbrite, consisting of four cooling units with ⁴⁰Ar/³⁹Ar ages 16--15 Ma. Previous geologists have suspected that the source of the tuff is located in northwestern Malheur County, eastern Oregon. This broad area is called the Dinner Creek Tuff Eruptive Center.

This thesis summarizes field work, XRF/ICP-MS geochemistry, thin section petrography, and SEM feldspar analysis from the summers of 2015 and 2016. The main purpose of this study is to identify sources for the Dinner Creek Tuff units within the Dinner Creek Tuff Eruptive Center. The secondary purpose …

Investigating Cable: The Potential And Actual Value Of Peg & Franchise Fees, Duncan Chaz Stewart

Dissertations and Theses

Cable Franchise Fees and PEG Fees function as key resources to the longevity of local media. Critics of the fees suggest that revenue earned from them is misplaced, and/or misused. This research examines the budgets of twenty US cities to determine how much money cities are collecting from these fees and where these funds are spent in an attempt to determine if the actual usages of Franchise and PEG Fee revenue corresponds to their theoretical benefits.

Identifying Clusters Of Non-Farm Activity Within Exclusive Farm Use Zones In The Northern Willamette Valley, Nicholas Chun

Dissertations and Theses

This thesis provides an extensive look at where permitted non-farm uses and dwellings have clustered within Exclusive Farm Use (EFU) zones in the Northern Willamette Valley in Oregon. There is a looming concern that non-farm related uses and dwellings, or non-farm development, are conflicting with agricultural preservation strategies. Specifically, non-farm developments can potentially undermine the critical mass of farmland needed to keep the agricultural economy sustainable, but until now, studies have lacked spatially precise data to systematically track these phenomena. This thesis offers methodological contributions towards analyzing these operations and presents a broad account of what has been occurring in …

An Investigation Of Public Injection Drug Use In New York City: A Mixed-Methods Study, Taeko M. Frost

Dissertations and Theses

Background: Drug use and injection-related harms are on the rise in the United States (US). As a result, new outbreaks of HIV and viral hepatitis C (HCV) attributed to injection drug use have been identified across the country. In addition to HIV and HCV, skin and soft tissue infection (SSTIs) that result from risky injection practices lead to preventable and costly emergency department (ED) visits. The concurrent opioid overdose epidemic has prompted a national conversation on how to effectively address drug-related harms and associated costs. International studies have identified that the place a person injects is related to adverse health …

Nonprofit Hospital Community Benefit Requirements: An Exploration Of National Health Policy Models, Justin P. Swearingen

Dissertations and Theses

Introduction: Nonprofit hospital organizations are public charities with complete tax immunity. Such exemptions are worth $24.6 billion and impact the health of hundreds of millions of people, yet what these charities must do to meet the current “community benefit standard” to maintain their tax-exempt status remains a policy debate. To help inform policymaking, an evaluation of four national requirement models was performed: Tax Value Requirement (at least the value of the tax exemptions must be spent on community benefit), Grassley Requirement (at least 5% of revenue must be spent on community benefit), Expense Requirement (at least 3% of expenses must …

The Function Of Religion In The Israeli-Palestinian Conflict, Stephanie Claire Mitchell

Dissertations and Theses

The role of religion in politics has been rising to the forefront of history in the Middle East for a number of decades and more so since 9/11, raising significant questions as to whether religion functions as a catalyst for conflict or peace. This thesis focuses specifically on the role of religion in the Israeli-Palestinian conflict and the manner in which actors incorporate religion into their national politics. In doing so, the inquiry focuses on the proponents of religion on both the Jewish and the Palestinian sides in addressing a) territorial rights, b) interpretations in the use of deadly force …