Digital Commons Network^™

Sexual Behavior And Substance Use Among Women Across The Spectrum Of Sexual Orientation, Margaret M. Wolff

Dissertations and Theses

Background: Compared to non-sexual minority women, sexual minority women are at greater risk for substance use and abuse, sexual risk behaviors, and unplanned teen pregnancy; few studies measure differing associations by sexual orientation (e.g., identity, behavior, attraction) or discordance (e.g., heterosexually-identified women with female partners) components. Minority stress may explain sexual minority women’s health disparities; thus, as U.S. policies evolve to reflect growing acceptance of all sexual minorities, research should examine sexual minority women’s health risk behaviors using multidimensional constructs of sexual orientation.

Methods: Using the female sample of the 2002-2013 National Survey of Family Growth (Aims 1-2 n=25,523; …

Manufacturing Consent In The Maghreb: How Mohammed Vi Of Morocco Survived The Arab Spring, David Michael Duke Ii

Dissertations and Theses

The Arab Spring of 2011 revealed stark variation in the durability of different types of authoritarian regimes. Kings and emirs demonstrably outperformed their republican peers. This paper provides a qualitative study of the Moroccan monarchy in order to better explain this pattern. The findings of an original media content analysis support the paper's thesis that Morocco's King Mohammed VI maintained his throne by effectively using a historically derived position of concentrated power and immense wealth to manipulate potential opposition and dominate public discourse. This multi-causal mechanism of manufactured consent helped create and sustain the monarch's domestic legitimacy while alienating his …

An Orphanage In Mexico: Four United Nations' Human Rights Of Children And Wolins' Prerequisites For Efficient Group Care Through The View Of The Manager And Staff, Lucia Beatriz Quesnel Galván

Dissertations and Theses

In Mexico there are officially 1.8 million orphaned children, without counting non-orphaned children deprived of family, who also need care; of these, only 657,000 are living in 703 orphanages. Mexico's government invests less than 2% of its budget toward protection of children. There is a lack of substantive research or official assessment of orphanages. According to the scant research found, the children's human rights most frequently violated in Mexican orphanages are the rights to nutrition and health care, to be protected from further victimization, to free expression and participation, and to not be exploited. This study was carried out through …

The Effects Of Frequency Of Social Interaction, Social Cohesion, Age, And The Built Environment On Walking, Gretchen Allison Luhr

Dissertations and Theses

The purpose of this dissertation was to explore, through a social ecological framework, the multifaceted effects of the neighborhood environment by investigating how dimensions of both the built environment and the neighborhood social context may interact to influence walking. Aesthetics, land use mix, crime, and pedestrian infrastructure were considered with respect to built environment walkability, and the neighborhood social context was conceptualized using measures of both social cohesion and social interaction with neighbors. This research used data from an Environmental Protection Agency (EPA)-funded study of 748 adults (18 years of age and older) residing in the Lents neighborhood in Portland, …

Formulation Of Colloidal Suspensions Of 3-Mercaptopropionic Acid Capped Pbs Quantum Dots As Solution Processable Qd "Inks" For Optoelectronic Applications, Chase Collier Reinhart

Dissertations and Theses

The use of colloidal quantum dots (QDs) for photovoltaic energy conversion is a nascent field that has been dominated for well over a decade by the use of 3-mercaptopropionic acid (3-MPA) capped PbS QDs. These QDs are routinely deposited via an in situ solid state ligand exchange process that displaces the native oleate ligand on the PbS QD surface. This ligand exchange procedure is wasteful of material and has been demonstrated to leave numerous impurities that limit electronic performance of the as-deposited QD devices. Until the last few years there was very little understanding in chemical literature as to many …

A Multi-Agent System For Adaptive Control Of A Flapping-Wing Micro Air Vehicle, Michal Podhradský

Dissertations and Theses

Biomimetic flapping-wing vehicles have attracted recent interest because of their numerous potential military and civilian applications. In this dissertation is described the design of a multi-agent adaptive controller for such a vehicle. This controller is responsible for estimating the vehicle pose (position and orientation) and then generating four parameters needed for split-cycle control of wing movements to correct pose errors. These parameters are produced via a subsumption architecture rule base. The control strategy is fault tolerant. Using an online learning process, an agent continuously monitors the vehicle's behavior and initiates diagnostics if the behavior has degraded. This agent can then …

Algorithm For Premature Ventricular Contraction Detection From A Subcutaneous Electrocardiogram Signal, Iris Lynn Shelly

Dissertations and Theses

Cardiac arrhythmias occur when the normal pattern of electrical signals in the heart breaks down. A premature ventricular contraction (PVC) is a common type of arrhythmia that occurs when a heartbeat originates from an ectopic focus within the ventricles rather than from the sinus node in the right atrium. This and other arrhythmias are often diagnosed with the help of an electrocardiogram, or ECG, which records the electrical activity of the heart using electrodes placed on the skin. In an ECG signal, a PVC is characterized by both timing and morphological differences from a normal sinus beat.

An implantable cardiac …

Wiki-Based Collaborative Creative Writing In The Esl Classroom, Rima Elabdali

Dissertations and Theses

Despite the growing number of L2 studies examining digitally-mediated collaborative writing, the vast majority of these studies have focused on academic writing tasks. This study examined the dynamics and perceptions of groups of ESL students who used wikis to write collaborative short stories. The study also compared the short stories written in groups with posttest short stories written individually in terms of creativity, accuracy, and complexity. The study involved nine students taking a Creative Writing course in an intensive English program at a large university in the U.S. It followed a multiple case study design; the students were divided into …

The Effectiveness Of Participation In A Project-Based Learning Project On At-Risk Student Self-Efficacy, Benjamin Aaron Weber

Dissertations and Theses

Project-based learning is a multifaceted approach to teaching in which students explore real-world problems and challenges while working in small collaborative groups. Project-based learning is active and engaging and drives students to obtain a deeper knowledge of the subjects they're studying, and students develop confidence and self-direction as they move through both team-based and independent work. This project endeavored to assess the effect of participation in a project-based learning (PBL) activity of the Wind and Oar Boat School's curriculum on the self-efficacy of at-risk high school students. Twenty students participated in the program for both math and applied arts credits …

Geothermometry Of Two Cascade Geothermal Systems, Donnel Alexander Malkemus

Dissertations and Theses

For this thesis I applied classical and multi-component geothermometry techniques to new water chemistry data from Breitenbush Hot Springs, Oregon and the Wind River Valley, Washington. A total of 20 well, spring, and stream samples from Breitenbush Hot Springs and 4 spring samples from the Wind River Valley were collected and analyzed for major, minor, and select trace anions and cations, as well as stable oxygen and hydrogen isotopes. I used two computer programs, GeoT and RTEst, to conduct multi-component geothermometry reservoir condition estimation on each water sample. Water chemistry data from Breitenbush Hot Springs indicates a range of thermal, …

A Meta-Analysis Of The Nomological Network Of Work Ability, Grant Brady

Dissertations and Theses

As the workforces of industrialized countries around the world continue to age, research is needed to better understand how policies regarding retirement, and exit from the workforce, impact older workers. In particular, it is important to identify mechanisms that can be used to understand and promote the retention of older workers. Work ability (WA), a construct that has been predominately studied in Scandinavian and European countries, has been studied in this context, and identified as a predictor of exit from the workforce. Using the Job Demands-Resources model (JDR; Demerouti, Bakker, Nachreiner, & Schaufeli, 2001) as the theoretical basis, the goal …

Investigations Into The Effects Of Water Exchange And The Structure Of Lanthanide Chelates, Katherine Marie Payne

Dissertations and Theses

Lanthanide chelates are effective agents for improving contrast in MR images. Optimizing the relaxation of inner sphere water molecules is a common focus of research in this field. However, the efforts to design an optimal contrast agent have commonly over-looked the relationship of water position and water exchange kinetics. This work explores structural conformation, the impact of very fast water exchange kinetics on hydration, and differing tumbling rates for regioisomers of a number of lanthanide chelates. We have grown crystals of LnDOTMA and obtained structural data by X-ray diffraction that provide a picture of the chelate during water exchange and …

Vulnerability And Protective Factors Of Stress-Related Drinking: An Exploration Of Individual And Day-Level Predictors Of Alcohol Involvement, Cameron Trim Mccabe

Dissertations and Theses

Problem alcohol use has far-reaching economic, intra-, and interpersonal consequences. One particularly hazardous form of drinking pertains to the consumption of alcohol as a means of regulating stress, or drinking to cope. As such, it is critical to identify pathways through which stress-related alcohol use occurs, as well as protective factors which may mitigate the aforementioned consequences. To achieve this, I conducted three studies examining these topics at multiple levels of analysis among two at risk populations for engaging in problematic drinking: College students and military service members. Study 1 is a published manuscript examining the association between personality, a …

Understanding The Importance Of Intermittently Fragmented Stream Habitat For Isolated Westslope Cutthroat Trout (Oncorhynchus Clarki Lewisi) In The Colville National Forest, Washington, Forrest Michael Carpenter

Dissertations and Theses

Climate change and anthropogenic effects have vastly reduced Westslope Cutthroat Trout (Oncorhynchus clarki lewisi, WCT) habitat throughout their range, including the Colville National Forest in northeastern Washington where this study was conducted. Many native salmonid populations have declined in abundance since the early 1900s due to a variety of climate- and human-driven forces. Westslope Cutthroat Trout are especially sensitive to habitat loss or degradation and to climate change. Together, climate change, habitat degradation, and non-native salmonid invasions are contributing to increasingly fragmented WCT populations. Ongoing and predicted future warming trends are expected to further fragment these populations and …

Citizen-Led Urban Agriculture And The Politics Of Spatial Reappropriation In Montreal, Quebec, Claire Emmanuelle Bach

Dissertations and Theses

Urban Agriculture (UA) has been practiced in Montreal, Quebec for well over a century. In the last five years or so, a renewed enthusiasm for UA has manifested itself in the form of citizen-led UA projects. The latter are often established in residual spaces, from vacant lots to sidewalks, and alleyways. These more spontaneous and informal UA practices point to a shift in how urban inhabitants perceive and use urban space. Through a case study of informal UA projects in Montreal, QC, this work brings attention to the dynamics surrounding the establishment of citizen-led UA projects, paying special attention to …

Development Of 3d Accelerometer Testing System, Mohammed Abbas Soudai Alsaedi

Dissertations and Theses

Accelerometers are used in numerous industries including aircrafts and missile navigations systems, rotary machines, and electronic devices such as tablets, cell phones, and cameras. Accelerometers of different purposes and specifications are being produced in large quantities. The large demand for accelerometers forces the need for accelerometer testing methodology that is more convenient and accurate. Inertial Micro-Electromechanical Systems Accelerometer (MEMS) require a series of tests that include physical stimuli. One of the key challenges is the cost associated with testing. Therefore, the accurate prediction of the sensor functions not only reduces the testing time but also more importantly contributes to reducing …

Unmanned Aerial Vehicle Based Structure From Motion Biomass Inventory Estimates, Emily Jane Bedell

Dissertations and Theses

Riparian vegetation restoration efforts demand cost effective, accurate, and replicable impact assessments. In this thesis a method is presented using an Unmanned Aerial Vehicle (UAV) equipped with a GoPro digital camera to collect photogrammetric data of a 2.02-acre riparian restoration. A three-dimensional point cloud was created from the photos using Structure from Motion (SfM) techniques. The point cloud was analyzed and compared to traditional, ground-based monitoring techniques. Ground truth data collected using the status-quo approach was collected on 6.3% of the study site and averaged across the entire site to report stem heights in stems/acre in three height classes, 0-3 …

Surviving Catastrophe: Resource Allocation And Plant Interactions Among The Mosses Of Mount St. Helens Volcano, Trevor David Williams

Dissertations and Theses

Mosses are some of the first colonizers to disturbed sites, yet their roles in early plant community structuring are not well understood. The primary succession zones of volcanoes provide opportunities to conduct natural experiments into how mosses contribute to early plant community formation, as well as how the unique environments found in such zones affect plant traits, particularly those associated with stress tolerance. Though plant community changes have been well-documented since Mount St. Helens (MSH) volcano erupted in 1980, the volcano's moss assemblages, their influence on other plants, and their potential roles in chemical-mediated competition and biogeochemical cycling have garnered …

Improved Sprint Results With Offshore Indian Teams, Fnu Abdul Hasheem

Dissertations and Theses

Due to the cultural and linguistic differences, different time zones, and complexities of knowledge transfer involved in IT offshoring, offshore-outsourced projects are more prone to failure than in-house and domestically outsourced projects. These inherent risks exacerbate the communication, coordination and collaboration between vendors and clients and thus affect various stages of the offshore outsourced software development (OSD).

Communication is a major factor of success or failure for any software project. In offshore software development OSD, communication is more critical than collocated software development. Frequent communication is not always possible due to challenges like time zone differences, holiday customs etc. where …

To Overcome Communication Challenges In Distributed/Virtual Scrum Teams, Priyamvada Walimbe

Dissertations and Theses

The purpose of this research is to give an overview of a scrum in distributed teams and to suggest ways overcome communication challenges in such projects. In this research proposal, the latest available research on a scrum in distributed teams will be thoroughly analyzed and evaluated to know the possible solutions for communication problems in distributed teams. A review of the literature suggested scrum is widely accepted agile methodology in software projects and also it works best within collocated teams. However, the literature review also proposes that lack of proper communication is one of the main challenge faced by distributed …

A Different Approach To Project Management: The Use Of Soft Skills, Hannah Adams

Dissertations and Theses

The term soft skills is traditionally used to describe interpersonal and subjective skills such as leadership, communication, and emotional intelligence. This paper addresses a further explanation of soft skills, their relation to project management, project management education, and the highlighted differences between a transactional leader and a transformational leader. Project management has often been defined as the making of schedules/tasks; but more importantly providing the inspiration, motivation, and facilitator of great minds to produce innovative ideas. Because of the sheer necessity for human interaction within the project management profession, soft skills are of crucial concern. Although mastering soft skills is …

Challenges When Using Scrum In Globally Distributed Teams, Sweta Shah

Dissertations and Theses

The interest of companies towards using agile approaches in GSD projects is growing at a rapid pace. On that note, it is extremely vital to consider the challenging factors involved in agile practices such as scrum in GSD projects. However, the remarkable and effective attempts towards precisely identify, synthesize and report the literature on agile practices for GSD projects have always been inadequate (Hossain, AliBabar & Young Paik, 2009).

With the purpose of encouraging research committee to explore and analyze the projects that implements scrum process in globally distributed environment, the thesis paper places great emphasis on challenges involved with …

Erp Critical Success Factors: Importance Of Erp Consultants In Erp Implementation, Adekunle S. Balogun

Dissertations and Theses

Enterprise Resource Planning, ERP is one of the most popular and successful information technology solution used in many organizations to share information within different business units to enhance and maximize productivity. The system is expensive, time-consuming, and complicated to implement and manage. The difficulties of ERP implementation have resulted in high rates of unsuccessful ERP implementation according to the stories of many organizations that have implemented the solution. The failure of ERP implementation has then led to several studies to investigate the Critical Success Factors (CSFs) that could influence the ERP implementation during and after implementation phases. Some of the …

The Effects Of Anthropogenic Stressors On Mercury Concentrations And Community Composition Of Freshwater Zooplankton, Meredith Powers Jordan

Dissertations and Theses

Methylmercury (MeHg) bioaccumulation in freshwater aquatic systems is impacted by anthropogenic stressors, including climate change and excess nutrients. The goal of this study was to determine how warmer water temperatures and excess nutrients would impact zooplankton communities and phytoplankton concentrations, and in turn increase or decrease MeHg concentrations in freshwater zooplankton. I used a 2x2 factorial design to determine if the interaction of temperature and nutrients would impact plankton metrics and zooplankton MeHg concentrations. Mesocosms were filled with Hg-contaminated water and plankton from Cottage Grove Reservoir, Oregon, a waterbody that has experienced decades of elevated MeHg concentrations and corresponding fish …

Using Blind Source Separation And A Compact Microphone Array To Improve The Error Rate Of Speech Recognition, Jeffrey Dean Hoffman

Dissertations and Theses

Automatic speech recognition has become a standard feature on many consumer electronics and automotive products, and the accuracy of the decoded speech has improved dramatically over time. Often, designers of these products achieve accuracy by employing microphone arrays and beamforming algorithms to reduce interference. However, beamforming microphone arrays are too large for small form factor products such as smart watches. Yet these small form factor products, which have precious little space for tactile user input (i.e. knobs, buttons and touch screens), would benefit immensely from a user interface based on reliably accurate automatic speech recognition.

This thesis proposes a solution …

Sedimentologic Changes In The Deposits Of An Evolving Lahar-Flood In 2006, Hood River Basin, Mount Hood, Oregon, Matthew Ray Poole

Dissertations and Theses

Over a span of six days from November 2-7, 2006 approximately 43 cm of precipitation fell over the Hood River Basin in Oregon. A lahar was initiated on the Eliot Branch of the Middle Fork Hood River by two or more landslides that occurred on the lateral moraines of the Eliot Glacier on the early part of November 7th, 2006. The Eliot Branch lahar was embedded within the larger regional flood that was occurring in the Hood River Basin and traveled a total of 48 km from the initiation points on the north flank of Mount Hood to the Hood …

Experimental Investigation Of Cfrp Wrapped Square Non-Ductile Reinforced Concrete Columns, Hayder Lateef Al-Khafaji

Dissertations and Theses

The use of fiber-reinforced polymers (FRP) for retrofitting or strengthening deficient concrete columns noticeably increased in the past few decades. Plenty of research has been conducted on the behavior of FRP-strengthened circular concrete columns, but far less research has dealt with non-circular columns. In the current study, the focus was to investigate the behavior of square columns with low to medium grade concrete and low steel reinforcement that were strengthened using carbon fiber reinforced polymer (CFRP) wrap. In the experimental portion of this investigation, twelve short square reinforced concrete columns (5" x 5" in cross section and 12" high) were …

An Assessment Of Post-Encroachment Times For Bicycle-Vehicle Interactions Observed In The Field, A Driving Simulator, And In Traffic Simulation Models, Ali Razmpa

Dissertations and Theses

Most safety analysis is conducted using crash data. Surrogate safety measures, such as various time-based measures of time-to-collision can be related to crash potential and used to gain insight into the frequency and severity of crashes at a specific location. One of the most common and acknowledged measures is post-encroachment time (PET) which defines the time between vehicles occupying a conflicting space. While commonly used in studies of motor vehicle interactions, studies of PET for bicycle-vehicle interactions are few. In this research, the PET of bicycle-vehicle interactions measured in the field, a driving simulator, and in a micro-simulation are compared. …

Seeing The Forest For The Roads: Auto-Tourism And Wilderness Preservation In Mount Hood National Forest, 1913-64, Taylor Elliott Rose

Dissertations and Theses

Between 1913 and 1964, automobile roads appeared throughout the Cascade Mountains around Mount Hood, just east of Portland, Oregon. From elaborate scenic highways to primitive dirt trails, each had its own story. Many of them are gone today, decommissioned and decomposing with the rotting understory soil of the forest. However, some remain as the most utilized spaces in Mount Hood National Forest, one of the most popular public land units for recreation in the country, owned and managed by the United States Forest Service. "Seeing the Forest for the Roads" uncovers the history of why roads were built, who planned …

Investigation Of Jet Dynamics In Cross-Flow: Quantifying Volcanic Plume Behavior, Graham Freedland

Dissertations and Theses

Volcanic eruption columns inject high concentrations of ash into the atmosphere. Some of this ash is carried downwind forming ash clouds in the atmosphere that are hazardous for private and commercial aviation. Current models rely on inputs such as plume height, duration, eruption rate, and meteorological wind fields. Eruption rate is estimated from plume height using relations that depend on the rate of air entrainment into the plume, which is not well quantified. A wind tunnel experiment has been designed to investigate these models by injecting a vertical air jet into a cross-flow. The ratio of the cross-flow and jet …