Digital Commons Network^™

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 …

Framing Physical Activity: Weight Control Frames And Physical Activity Motivation, Kristin Spurkland

Dissertations and Theses

Public health institutions and popular media frequently frame weight loss and weight control as primary benefits of physical activity. This exploratory, descriptive study examined how respondents rated statements exemplifying three physical activity frames: a weight control frame, a medical frame, and an active embodiment frame. An anonymous, online survey was conducted in March 2018; respondents rated frame statements in terms of inspiring motivation to engage in physical activity, and in terms of perceived credibility. They also provided anthropometric data and physical activity data. Data were analyzed for the entire sample as well as stratified by multiple variables, including body mass …

The Gender Gap In Postsecondary Enrollment Intentions: The Mediating Role Of Student Attitudes And Behaviors, Paul J. Deppen Iii

Dissertations and Theses

Current literature on the gender gap in higher education lacks in-depth exploration of how the gap between males and females in postsecondary enrollment and degree attainment differs among racial/ethnic groups and among students of differing socioeconomic status (SES). This thesis explores the potential mediating role of student attitudes and behaviors and whether or not inclusion in certain racial/ethnic or SES groups moderates the relationship between gender and intentions to continue one's education immediately after high school graduation. This study uses data from the High School Longitudinal Study of 2009. Results suggest that student attitudes mediate more of the relationship between …

Millennial Perceptions On Homeownership And Financial Planning Decisions, Margaret Ann Greenfield

Dissertations and Theses

This master's thesis investigates the economic factors that are affecting the financial decision-making of educated, middle to upper class Millennials in Los Angeles, California. This thesis explores how economic factors, preferences, and self-efficacy interact to determine housing pathways. This thesis also asks whether Millennials in Los Angeles will be able to afford homes and how the cultural narrative of the American Dream affects preferences. In order to answer these questions, twenty in person interviews are conducted with residents of Los Angeles in which they are asked about their values and preferences regarding housing, and the economic factors they are currently …

Epa-Rimm-V: Efficient Rootkit Detection For Virtualized Environments, Tejaswini Ajay Vibhute

Dissertations and Theses

The use of virtualized environments continues to grow for efficient utilization of the available compute resources. Hypervisors virtualize the underlying hardware resources and allow multiple Operating Systems to run simultaneously on the same infrastructure. Since the hypervisor is installed at a higher privilege level than the Operating Systems in the software stack it is vulnerable to rootkits that can modify the environment to gain control, crash the system and even steal sensitive information. Thus, runtime integrity measurement of the hypervisor is essential. The currently proposed solutions achieve the goal by relying either partially or entirely on the features of the …

The Limitations Of Dna Interstrand Cross-Link Repair In Escherichia Coli, Jessica Michelle Cole

Dissertations and Theses

DNA interstrand cross-links are a form of genomic damage that cause a block to replication and transcription of DNA in cells and cause lethality if unrepaired. Chemical agents that induce cross-links are particularly effective at inactivating rapidly dividing cells and, because of this, have been used to treat hyperproliferative skin disorders such as psoriasis as well as a variety of cancers. However, evidence for the removal of cross-links from DNA as well as resistance to cross-link-based chemotherapy suggests the existence of a cellular repair mechanism. Characterizing the pathways involved in DNA interstrand cross-link repair has been challenging due to the …

Short-Term Tracking Of Orientation With Inertial Sensors, Golriz Sedaghat

Dissertations and Theses

In the past several years, IMU's have been widely used to measure the orientation of a moving body over a continuous period of time. Although, inertial navigation is a common approach for estimating the orientation, it greatly suffers from the accumulation of error in the orientation estimation. Most of the current common practices apply zero velocity update as a calibration method to address this problem and improve the estimation accuracy. However, this approach requires the sensors to be stationary frequently.

This thesis introduces a novel method of calibration for estimating the elevation and bank angles of the orientation over a …

Murmuration, Braeden Dillenbeck

Dissertations and Theses

The poems that comprise Murmuration are an act of vigilance in the face of loss. At certain moments in the distorted timeline of grief one searches the remaining world around them for signs of the beloved, signs that they are not simply gone but instead transformed or dispersed into another way of being. In this looking one's relationship to the external world undergoes a radical transformation of its own and demands a sustained attention from the bereaved that often draws from, but ultimately outruns cataloguing acts of memory. These poems attempt to render the movements of that attention as it …

The Role Of Caregiver Disruption In The Development Of Juvenile Sexual Offenders, Miranda Sitney

Dissertations and Theses

In the last decade, it has been recognized that juveniles commit as much as 20% of all sexual offenses in the United States (DOJ, 2004). Research that attempts to understand why young people commit sex crimes points to an array of family factors that may uniquely contribute to the development of sexual offending over and above general juvenile delinquency. This study specifically examines disrupted caregiving, or receiving insufficient or substitute care, as a potential moderator in the relationship between offense status and caregiver-child relationship quality. Four distinct moderators were tested: gender of caregiver, biological relationship between caregiver and child, number …

A Mutual Charge: The Shared Mission Of Herbert Hoover And Harry S. Truman To Alleviate Global Hunger In A Postwar World, Brian Douglas Reese

Dissertations and Theses

Famine and destitution stemming from the Second World War had spread across the European continent and parts of Asia by mid-1945. Recognizing the need for recovery and survival in those regions, President Harry S. Truman at the recommendation of several Cabinet members, summoned ex-President Herbert Hoover for advice on how the United States should proceed in offering aid beyond the earlier efforts of the United Nations Rehabilitation and Relief Administration and other relief sources. After an absence from the White House and official government participation for many years, Hoover readily provided crucial advice on addressing famine relief in Europe and …

Verb Stem Alternation In Vaiphei, Jesse Prichard

Dissertations and Theses

This thesis describes the form and function of verb stem alternations (VSAs) in Vaiphei, a Kuki-Chin (KC) language belonging to the larger Tibeto-Burman branch of the Sino-Tibetan language family. In the existing literature on Vaiphei and Kuki-Chin verb stem alternations, there is no treatment of the form and function of Vaiphei verb stem alternations and how they may be used in classifying Vaiphei in the broader Northern Kuki-Chin language family. I document the form and function of Vaiphei verb stem alternations, showing how these compare to other Northern Kuki-Chin languages and where to classify Vaiphei in Northern Kuki-Chin.

Participants were …

Volcanic Glass As A Paleoenvironmental Proxy: Comparing Preparation Methods On Ashes From The Lee Of The Cascade Range In Oregon, Usa, Tessa Boe Carlson

Dissertations and Theses

Deuterium ratios (δD) of hydrated volcanic glass have been used to reconstruct paleoenvironments, although the reliability and proper sample preparation protocol have been debated. In this study, hydrated volcanic ash samples from the lee of the Cascades were prepared using two separate methods. Method 1 involves sonicating and rinsing samples with hydrochloric acid (HCl) followed by hand-selection of glass shards (125-212µm). Method 2 requires hydrochloric acid (HCl) and hydrofluoric acid (HF) abrasion as well as heavy liquid separation of shards (70-150µm). Method 2 produced more consistent results with decreased intra-replicate variability in both water content (-0.92 wt. %) and deuterium …

Anarchism On The Willamette: The Firebrand Newspaper And The Origins Of A Culturally American Anarchist Movement, 1895-1898, Alecia Jay Giombolini

Dissertations and Theses

The Firebrand was an anarchist communist newspaper that was printed in Portland, Oregon from January 1895 to September 1897. The newspaper was a central catalyst behind the formation of the culturally American anarchist movement, a movement whose vital role in shaping radicalism in the United States during the Progressive Era has largely been ignored by historians. The central argument of this thesis is that the Firebrand publishers' experiences in Gilded Age Portland shaped the content and the format of the newspaper and led to the development of a new, uniquely American expression of anarchism.

Anarchism was developed in response to …

Affirmative Consent Endorsement And Peer Norms Supporting Sexual Violence Among Vulnerable Students On College Campuses, Alyssa Marie Glace

Dissertations and Theses

Understanding how students endorse affirmative consent in their sexual relationships is essential to sexual violence prevention. Some research has indicated that LGBT students and students with disabilities may negotiate and endorse consent uniquely because of socially constructed traditional sexual scripts. Research indicates gender differences may exist as well. The proposed research examines differences based on gender, LGBT status, and disability in affirmative consent endorsement and peer norms around sexual violence. Results indicated that women, nonbinary students, LGBT students, and students with disabilities were significantly less likely than their privileged counterparts to indicate low endorsement of affirmative consent. Results also indicated …

Comparative Genetic And Genomic Analysis Of The Novel Fusellovirus Sulfolobus Spindle-Shaped Virus 10, David Andrew Goodman

Dissertations and Theses

Viruses that infect thermophilic Archaea are unique in both their structure and genetic makeup. The lemon-shaped fuselloviruses - which infect members of the order Sulfolobales, growing optimally at 80º C and pH 3 - are some of the most ubiquitous and best studied viruses of the thermoacidophilic Archaea. They provide a malleable and useful genetic tool for probing into the functions of their host, as well as the host responses to infection. Nonetheless, much about these viruses remains to be learned to further understand their morphological, genetic, and life cycle characteristics.

In order to investigate these aspects of these …

Electro-Drop Bouncing In Low-Gravity, Erin Stivers Schmidt

Dissertations and Theses

We investigate the dynamics of spontaneous jumps of water drops from electrically charged superhydrophobic dielectric substrates during a sudden step reduction in gravity level. In the brief free-fall environment of a drop tower, with a non-homogeneous external electric field arising due to dielectric surface charges (with surface potentials 0.4-1.8 kV), body forces acting on the jumped drops are primarily supplied by polarization stress and Coulombic attraction instead of gravity. This electric body force leads to a drop bouncing behavior similar to well-known phenomena in 1-g₀, though occurring for much larger drops (~0.5 mL). We show a simple …

An Experimental Study On The Impact Of Informal Rape Myth Education To Alter Rape Myth Acceptance Scores In A Non-Student Sample, Leah Noelle Reddy

Dissertations and Theses

Sexual assault has come to the forefront in terms of prevention and education for many social institutions such as college campuses. However, with a growing body of research highlighting the importance and effectiveness of interventions, research examining the impact of rape-related education on altering rape myth acceptance (RMA) among non-student populations is severely lacking. This is a problematic gap given the issue of sexual assault in the United States extends well beyond academia. The current study aimed to fill this gap by employing an experimental design with repeated measures. To detect changes in RMA after a short rape myth education …

Mooring Impacts On Zostera Marina Meadows And Associated Epifauna In Nantucket Harbor, Massachusetts, Usa, Andrew Wright Mccandless

Dissertations and Theses

Seagrass ecosystems are some of the most productive in the world and provide a variety of ecosystem services but are facing global decline chiefly due to anthropogenic disturbance. Mechanical disturbances to seagrass meadows from anchoring, propeller scars, and mooring scars result in losses or damage to both shoots and the underlying rhizome. I conducted a literature synthesis on the extent of, recovery from, and ecological impacts of these mechanical disturbances to seagrass meadows. The literature suggests that anchoring damage tends to be worst in deeper water where larger vessels anchor and can cause large (>100m²) loss per …

Effects Of Fan Cooling At Room Temperature On Indoor 20-Km Cycling Time Trial Performance, Matthew Bloom

Dissertations and Theses

Aim: The primary purpose of this study was to examine effects of a fan-induced airflow at standard room temperature (20-23°C) on 20-km cycling time trial performance. A secondary purpose was to investigate two fan speeds and whether a difference in performance existed with increased fan speed in intermediate duration indoor cycling tests.

Methods: Seven trained cyclists completed three 20-km cycling time trials under three conditions in a randomized crossover design. The 3 conditions were: 1) control (no fan), 2) low speed fan, and 3) high speed fan.

Results: A tendency for modest decreases in time to completion (TTC) were noted …

Differential Well-Being In Response To Incivility And Surface Acting Among Nurses As A Function Of Race, Lauren Sarah Park

Dissertations and Theses

Demand for healthcare services is rising dramatically as the proportion of older adults in the United States increases, and the success of these healthcare organizations depends on cooperation among patients, doctors, and nurses. These interpersonal interactions come with costs associated with managing one's emotions in ways that are in line with completing job tasks effectively, especially as past research has demonstrated that nurses are likely to experience and respond to incivility, and nurses of minority backgrounds even moreso. This study examines the effect of experiencing incivility on engaging in surface acting, or simulating emotions that are not actually felt; how …

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 …

Sexual Expression And Social Connectedness Among Community-Dwelling Older Adults, In The United States, Neal J. Blangiardo

Dissertations and Theses

Sexuality is a central aspect of human identity for all people, including older persons. Sexual expression continues across the lifespan, despite the cultural fallacy of the sexlessness of older adults. Older adults live active sexual lives which involve relationships, social roles, and an array of sexuality-related needs.

This dissertation examines the relationship between sexual expression and social connectedness, in older community-dwelling adults. Research on sexuality in this community predominately focuses on genital sexual expression, has not explored the non-genital dimension of sexual expression, and little is known about the role of social relationships that can play in supporting sexual expression. …

What's New Pussyhat? Men, Feminism, And Social Identity, Rachel Lee Crist

Dissertations and Theses

Current understandings of feminism do not seek to dissuade men from feminism as a movement; moreover, men's inclusion in the feminist movement is seen as paramount to achieving equality and dismantling all forms of hegemonic power. Past research has shown that identification with a social movement is a strong predictor for participation in social change, more so than belonging to a disadvantaged social category. Despite this, there is nascent literature on how men define, identify as, and practice feminism. This study draws from a thematic analysis of three focus groups of self-identified males to investigate their self-identification as feminist. Using …

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. …

Biomimetic Design And Construction Of A Bipedal Walking Robot, Alexander Gabriel Steele

Dissertations and Theses

Human balance and locomotion control is highly complex and not well understood. To understand how the nervous system controls balance and locomotion works, we test how the body responds to controlled perturbations, the results are analyzed, and control models are developed. However, to recreate this system of control there is a need for a robot with human-like kinematics. Unfortunately, such a robotic testbed does not exist despite the numerous applications such a design would have in mobile robotics, healthcare, and prosthetics.

This thesis presents a robotic testbed model of human lower legs. By using MRI and CT scans, I designed …

A Million Piece Jigsaw Puzzle: Transition Experiences Of Foster Youth Accessing Higher Education Through Community College, Karen A. Sullivan-Vance

Dissertations and Theses

A college education offers people social and economic benefits, yet youth from foster care backgrounds are less likely than their peers to attain a college education, which places this already vulnerable population at higher risk for a lifetime of living on the margins of society. Foster alumni face multiple obstacles to accessing and persisting in higher education. To facilitate and support the success of this frequently overlooked population, professionals in higher education need to understand these obstacles. Little is known about the experiences of youth with foster care backgrounds as they transition into and through higher education. Although existing research …

Development Of A Direct Aqueous Synthetic Route For The Production Of Elemental Bismuth Nanoparticles, Colin Jon Hiatt

Dissertations and Theses

Bismuth nanoparticles (Bi NPs) for use as an X-ray contrast material have gained significant traction in recent years due to the high atomic number and generally accepted biological tolerance of bismuth. However, to be considered a viable candidate for use in this application, water solubility is a necessity, which poses a challenge, since bismuth tends to readily oxidize. For this reason, research into the direct aqueous synthesis of Bi NPs is still in its infancy and can be very difficult, as described in Chapter 1. The remaining chapters of the thesis describe the direct aqueous synthesis of Bi NPs starting …

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 …

Electric Water Heater Modeling For Distributed Energy Resource Aggregation And Control, Anne E. Clarke

Dissertations and Theses

Today's utilities face new challenges due to the continually increasing penetration of residential solar and other distributed, stochastic generation sources. In order to maintain balance and stability in the grid without building costly, large-scale generation plants, utilities are turning to distributed energy resources for use in demand response programs. Demand response is a cost-efficient way to balance grid load/generation without the need for increased capital investment in traditional generation resources. Demand response programs are excellent exploiters of end-user devices that otherwise further accentuate the daily load curve and thus, add to the difficulties created by daily load peaks.

Electric water …