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Integrating Work Ability Into The Organizational Science Literature: Advancing Theory And Developing The Nomological Network, Grant Brady

Dissertations and Theses

As the workforce ages, enabling individuals to work effectively across the lifespan is critical for individuals, organizations, and societies. Put simply, societies and organizations are beginning to face a "new normal" in which people must continue working later in life. Investigations of work ability (WA), an individual's ability to meet the demands of their job, is a line of research that facilitates our understanding of the factors related to working successfully across the lifespan. Although research has established that WA is influenced by a range of organizational and personal factors and linked WA to retirement and disability, a number of …

Evaluating The Utility Of Theories Of Social Integration In Understanding Areal Suicide Rates In The United States, Nathan Finch Parsons

Dissertations and Theses

Despite over a century's worth of study, areal variations in suicide rate remain largely unexplained. In order to better understand these regional differences, this analysis aggregates county-level National Center for Health Statistics Multiple Cause of Death data with data from the US Census, the Association of Statisticians of American Religious Bodies, and the Penn State Northeast Regional Center for Rural Development to test the three leading conceptualizations of social integration (i.e. demographic, compositional, ecological) against US suicide rates. Results of negative binomial regression models indicate that an ecological measure, social capital, is substantially associated with suicide rate, while demographic and …

Using Marginal Structural Models To Control For Time-Dependent Confounding And Detect Effect Modification In A Randomized Control Trial With A Time-Varying Exposure, Non-Adherence And Missing Data, Elizabeth A. Lancet

Dissertations and Theses

Background: Unlike traditional regression used in the Intention to Treat (ITT) approach, Marginal Structural Models (MSM) can account for joint effects of baseline and subsequent treatments as well as the presence of time-dependent confounding influenced by prior treatment and selection bias due to censoring. In addition, MSMs have been theorized to be able to assist investigators in determining the overall benefit of a drug in the total population as they are able to provide a summary effect size across all strata of an effect modifier which cannot be done via tradition regression techniques. The overall goal of this dissertation is …

Comorbidities And Medication Adherence Among Older Individuals Living With Hiv In The United States, Amanda M. Kong

Dissertations and Theses

The number of people living with HIV (PLWH) ≥65 years old is increasing in the United States (US) as PLWH live longer. In 2015, there were nearly 1 million people living with diagnosed HIV in the US and under 10% were age ≥65. By 2035, the proportion of PLWH in this age group is projected to be 27%. Like the general population of elderly individuals, as they age, PLWH face age-related comorbidities, many of which require routine medical care and daily medications, in addition to daily antiretroviral therapy (ART) for treatment of HIV. Previous research has found that PLWH develop …

Use Of And Access To Abortion Services Among Asian And Immigrant Populations In The United States, Sheila Desai

Dissertations and Theses

Background: Abortion is common in the United States (U.S.) and a critical component of comprehensive reproductive health care. Yet, little research has documented patterns of abortion use among Asian populations or potential barriers to abortion care among immigrants in the U.S., two rapidly growing but understudied populations. In response, this dissertation aims to examine use of and access to abortion services among individuals obtaining abortions in the U.S., focusing specifically on Asians in New York City (NYC), immigrants in the U.S., and individuals living in high immigrant concentration neighborhoods in the U.S.

Methods: Using vital statistics data from …

The Association Of Higher Carbon Dioxide Levels And Teachers’ Perceived Air Quality And Well Being In New York City Elementary Schools, Leon Levine

Dissertations and Theses

Introduction:

Several recent studies have investigated the direct effects of carbon dioxide (CO₂) at concentrations typically found in office buildings on occupant cognitive functioning. These studies have reported a significant association between (impaired) decision making ability and exposure to increased levels of CO₂ (600 ppm versus 1500 ppm). The findings have serious implications in a classroom setting since the objective of schools is to provide an optimal environment for learning. If CO₂ levels in schools are elevated, the teachers’ health and the students’ learning environment will be compromised. Higher CO₂ levels could impact teachers’ and …

Next Generation Science Standards And Physics First: A Case Study Of High School Teachers' Beliefs And Practices, Stephen Godfrey Scannell

Dissertations and Theses

This dissertation is a case study of a school district in the Pacific Northwest that developed three-year high school science curricula using a Physics First course sequence (Physics, Chemistry, Biology), with the crosscutting concept Patterns as the central theme of the courses. The purpose of the study was to examine the impact of the implementation of the 9th grade course, Patterns Physics, on teacher practice and beliefs about science teaching and determine whether this new approach facilitated teacher classroom practices and beliefs congruent with those expressed in A Framework for K-12 Science Education (NRC, 2012) and the Next Generation Science …

Context-Aware Wi-Fi Infrastructure-Based Indoor Positioning Systems, Huy Phuong Tran

Dissertations and Theses

Large enterprises are often interested in tracking objects and people within buildings to improve resource allocation and occupant experience. Infrastructure-based indoor positioning systems (IIPS) can provide this service at low-cost by leveraging already deployed Wi-Fi infrastructure. Typically, IIPS perform localization and tracking of devices by measuring only Wi-Fi signals at wireless access points and do not rely on inertial sensor data at mobile devices (e.g., smartphones), which would require explicit user consent and sensing capabilities of the devices.

Despite these advantages, building an economically viable cost-effective IIPS that can accurately and simultaneously track many devices over very large buildings is …

Distribution And Origin Of Carbide In Ordinary Chondrites, Karla Rae Farley

Dissertations and Theses

To understand the occurrence and distribution of carbide minerals in ordinary chondrites, thirty meteorites were examined, twenty-eight ordinary chondrites and two iron meteorites. The occurrence of carbide, textures, and chemical compositions were examined in the 7 carbide-bearing meteorites. Two formation methods for carbide have been presented in previous research. These are aqueous alteration and shock heating, and they are examined for validity in this thesis. Additionally, one other formation method for carbide formation through impact and brecciation is put forth and examined. Textural differences between the carbide-magnetite assemblages (CMAs) observed by Krot et al., (1997) and those seen in this …

An Investigation Of The Impact Of High School Student Fine Arts Course Accumulation On Mathematics Course Achievement, Daniel Mackin Freeman

Dissertations and Theses

Science, technology, engineering, and mathematics (STEM) educational achievement is vital to economic competitiveness in the United States and abroad. Despite a concerted effort, the US lags well behind many similarly developed nations. Research suggests that the integration of fine arts education into traditional STEM curriculum (STEAM) boosts academic achievement in STEM subjects and closes gaps between low- and high-socioeconomic status students. Justifications for STEAM programs are based, however, on the unexamined assumption, for one, that fine arts courses instill creative and critical thinking skills that can be transferred to STEM subjects. The present study explores the impact of taking fine …

Seismic Performance Of Substandard Reinforced Concrete Bridge Columns Under Subduction-Zone Ground Motions, Alvaro Francisco Lopez Ibaceta

Dissertations and Theses

A large magnitude, long duration subduction earthquake is impending in the Pacific Northwest, which lies near the Cascadia Subduction Zone (CSZ). Great subduction zone earthquakes are the largest earthquakes in the world and are the sole source zones that can produce earthquakes greater than M8.5. Additionally, the increased duration of a CSZ earthquake may result in more structural damage than expected. Given such seismic hazard, the assessment of reinforced concrete substructures has become crucial in order to prioritize the bridges that may need to be retrofitted and to maintain the highway network operable after a major seismic event. Recent long …

"It's All Because I Like The Person That's Teaching Me": Masculinities, Engagement, And Caring Relationships In Secondary Schools, Cristy Lauren Weggelaar

Dissertations and Theses

U.S. schools face a well-documented gender gap within some important educational and social indicators. In the United States, boys and young men are significantly more likely than girls and young women to be diagnosed with a learning disability, leave high school without a diploma, receive failing grades in core classes, and be suspended or expelled from school. This study uses an interpretive research framework to investigate the relationship between this gender gap in education and constructions of masculinity, social and cultural capital, agency, caring and resistance in secondary schools. Data collected through interviews with young men who engaged in acts …

Tree Canopy Cover And Potential In Portland, Or: A Spatial Analysis Of The Urban Forest And Capacity For Growth, Jeff Ramsey

Dissertations and Theses

Urban forests have positive impacts on human and ecosystem health, reduce stress on aging stormwater infrastructure, increase property values, and reduce energy consumption. The scale of these benefits ranges from the hyper-local to the global. While the benefits of urban forests can extend well beyond the boundaries of cities, they often do not reach all residents of the city equally. Urban forest policies do not adequately address environmental equity or employ planting strategies with knowledge of the social and political factors that determine the spatial variations of tree canopy extent in cities. Chapter I analyzes the determinants of current canopy …

Making Imaginaries: Identity, Value, And Place In The Maker Movement In Detroit And Portland, Stephen Joseph Marotta

Dissertations and Theses

This dissertation explores the maker economy and culture in Detroit, MI and Portland, OR and queries the "Made in Place" branding strategy that relies so heavily on a shared imagination of cities, identities, and values. Bridging the gap between urban economic development, political economy, and affect theory, this dissertation is centrally concerned with how imagination works as a commons and how such "imaginaries" shape each city's milieu of small, entrepreneurial, artisanal producers ("makers"). The constituent elements of "Made in" branding "made" and "place" suggest common understandings of each; this sense of coherence is critical for how value is added to …

Learning From Culturally Specific Programs And Their Impact On Latino Parent Engagement, Analucia Lopezrevoredo

Dissertations and Theses

Latinos are the largest and fastest growing ethnic minority group in the United States. Academically, they are significantly trailing their non-Latino peers in graduation and overall educational attainment. Among many socioeconomic factors, parent engagement has been identified as being a defining indicator of student success. Reflective of racial and class disparities, this study explored with the use of critical race and intersectionality theory, that low Latino parent engagement is a result of the historical devaluing and omission of Latino culture, history and language from formal academic settings, and compounding social factors that make engagement complex for Latino immigrants in America …

Memcapacitive Reservoir Computing Architectures, Dat Tien Tran

Dissertations and Theses

In this thesis, I propose novel brain-inspired and energy-efficient computing systems. Designing such systems has been the forefront goal of neuromorphic scientists over the last few decades. The results from my research show that it is possible to design such systems with emerging nanoscale memcapacitive devices.

Technological development has advanced greatly over the years with the conventional von Neumann architecture. The current architectures and materials, however, will inevitably reach their physical limitations. While conventional computing systems have achieved great performances in general tasks, they are often not power-efficient in performing tasks with large input data, such as natural image recognition …

Snowy Plover Demography In Oregon, Eleanor Prindiville Gaines

Dissertations and Theses

A thorough understanding of demographic parameters and their contribution to overall population growth is fundamental to effective conservation of small populations, but this information is often lacking. The Pacific Coast population of the Western Snowy Plover (Charadrius nivosus nivosus) is listed as threatened and has been the target of long-term, multi-pronged management in Oregon. The Oregon coastal population has been intensively monitored since 1990, and over 80% of the population is color banded, but a comprehensive analysis of demographic parameters and the effect of management on vital rates and population growth has been unavailable until now. Here, the …

Closing The Loop: The Capacities And Constraints Of Information And Communication Technologies For Development (Ict4d), Phillip Nicholas Turman-Bryant

Dissertations and Theses

As a mechanism for collecting and sharing information, information and communications technologies (ICT) hold immense potential for individuals and institutions in low- and middle-income countries. Currently the distribution and adoption of ICTs--particularly mobile devices--has far outpaced the provision of other household services like clean water, sanitation, hygiene, or energy services. At the same time, the development and deployment of Internet of Things (IoT) devices including cellular- and satellite-connected sensors is facilitating more rapid feedback from remote regions where basic services are most limited. When used in conjunction with economic development or public health interventions, these devices and the feedback they …

Exploring The Main Effects Of Patient Activation And Provider Support For Patient Self-Management On Patient Portal Use, Linda Anne Greenspan

Dissertations and Theses

Objectives:

This dissertation was designed to: (1) explore variations in clinicians’ views about patient self-management, (2) explore variation in patient activation and (3) explore variation in patients’ and their primary care physicians’ characteristics in the use of a patient portal and the main effects of patient activation and primary care physician support for patient self-management on portal use in an understudied closed multi-specialty ambulatory center. The main hypothesis is that primary care physician support for patient self-management will be an effect modifier on the association between patient activation and patient portal use.

Setting:

The New York Hotel Trades Council and …

Impact Of Professional Development On Accessible Early Literacy Content For Preschool Children With Disabilities In Public Library Storytime, Melissa Pebly

Dissertations and Theses

Library storytime programs provide opportunities for preschool children to develop readiness skills in early literacy that are linked in research to later success in learning to read and write. Children with disabilities that do not demonstrate school readiness skills upon entry to kindergarten are often placed in self-contained special education settings where opportunities to learn to read and write are diminished. English Language Learners (ELL) who have disabilities face additional challenges in benefiting from the models of language that are optimal for learning literacy when placed in self-contained settings. Despite the critical role that storytime programs play in equalizing the …

Development Of A Readiness Assessment Model For Evaluating Big Data Projects: Case Study Of Smart City In Oregon, Usa, Husam Ahmad Barham

Dissertations and Theses

The primary goal of this research is to help any organization, which is planning to transform to the big data analytics era, by providing a systematic and comprehensive model that this organization can use to better understand what factors influence big data projects. Also, the organization's current status against those factors. Finally, what enhancements are needed in the organization's current capabilities for optimal management of factors influencing an upcoming big data project. However, big data applications are vast and cover many sectors, and while most of the factors influencing big data projects are common across sectors, there are some factors …

Isoprene Emission In Polytrichaceae Mosses, Timea Deakova

Dissertations and Theses

Our first aim was to identify and quantify Biological Volatile Organic Compound (BVOC) emissions, specifically emissions of isoprene, from the moss Polytrichum juniperinum during its earliest stage of life. Isoprene emission from mosses could be a significant component of the total global budget of BVOC emissions. Data concerning the spatial and temporal variability of these emissions are lacking due to poor characterization of the physical and biological factors controlling isoprene synthesis in both vascular and non-vascular plants. We found that P. juniperinum in its early life stage (protonema) can emit isoprene at detectable levels at day five after spore germination. …

Simultaneous Bilingual Middle School Students Becoming Biliterate: What Do Students Think About Their Biliteracy As Taught Through The "Bridge" Strategy In A Humanities Dual Language/Immersion Class?, Alma Lucinda Diaz-Philipp

Dissertations and Theses

In response to the increasing number of United States school students from diverse linguistic and cultural backgrounds at all grade levels, often called "simultaneous bilinguals," the U.S. school districts are opening schools that offer bilingual instruction. One instructional strategy that seems promising is the "Bridge," where students contrast and connect the literacy skills learned in one language to the literacy skills in their other language. An underlying component of learning a language is student attitude and motivation to learn. Research also seems to indicate that student attitude and motivation toward biliteracy can affect their achievement. There seems to be a …

Crumpled And Abraded Encryption: Implementation And Provably Secure Construction, Scott Sherlock Griffy

Dissertations and Theses

Abraded and crumpled encryption allows communication software such as messaging platforms to ensure privacy for their users while still allowing for some investigation by law enforcement. Crumpled encryption ensures that each decryption is costly and prevents law enforcement from performing mass decryption of messages. Abrasion ensures that only large organizations like law enforcement are able to access any messages. The current abrasion construction uses public key parameters such as prime numbers which makes the abrasion scheme difficult to analyze and allows possible backdoors. In this thesis, we introduce a new abrasion construction which uses hash functions to avoid the problems …

Very High Frequency Bipolar Junction Transistor Frequency Multiplier Drive Network Design And Analysis, Daniel Dale Schaeffer

Dissertations and Theses

The function of a frequency multiplier is verbatim -- a frequency multiplier is a circuit that takes a signal of particular frequency at the input and produces harmonic multiples of the input signal's frequency at the output. Their use is widespread throughout history, primarily in the application of frequency synthesis. When implemented as a part of a large system, a chain of multipliers can be used to synthesize multiple reference signals from a single high-performance reference oscillator.

Frequency multiplier designs use a variety of nonlinear devices and topologies to achieve excitation of harmonics. This thesis will focus on the design …

Examining Human Behavior And Tool Use Through Experimental Replications And A Technological Analysis Of Ground Stone In The Lower Columbia, Kelley Prince Martinez

Dissertations and Theses

While ground stone tools represent diverse activities, the technology is analyzed at a coarse level in the Pacific Northwest. Conducting more detailed analyses of ground stone assemblages can inform on regional Indigenous raw material knowledge, resource use, and tool manufacturing and maintenance practices.

In this thesis I addressed questions regarding ground stone technology, including manufacturing time investments, tool recycling, and how ground stone tools were used through the application of experimental tool replication, use studies, and in depth analyses. I replicated tools that are common in the region, including a banded and notched net weight, a maul, two bowls, and …

Necessary Conditions For Stability Of Vehicle Formations, Pablo Enrique Baldivieso Blanco

Dissertations and Theses

Necessary conditions for stability of coupled autonomous vehicles in R are established in this thesis. The focus is on linear arrays with decentralized vehicles, where each vehicle interacts with only a few of its neighbors. Decentralized means that there is no central authority governing the motion. Instead, each vehicle registers only velocity and position relative to itself and bases its acceleration only on those data. Explicit expressions are obtained for necessary conditions for asymptotic stability in the cases that a system consists of a periodic arrangement of two or three different types of vehicles, i.e. configurations as follows: ...2-1-2-1 or …

A Scoring Model To Assess Organizations' Technology Transfer Capabilities: The Case Of A Power Utility In The Northwest Usa, JoãO Ricardo Lavoie

Dissertations and Theses

This research intends to advance knowledge in the technology management field, most importantly in the study of organizations that develop technologies in-house and wish to enhance their technology transfer performance while maintaining adherence between R&D activities and overall business strategies. The objective was to build a multi-criteria decision-making model capable of producing a technology transfer score, which can be used by practitioners in order to assess and later improve their organizations' technology transfer capabilities -- ultimately aiming to improve technology development as a whole. The model was applied to a major power utility organization in the Pacific Northwest of the …

Can Churches Change A Neighborhood? A Census Tract, Multilevel Analysis Of Churches And Neighborhood Change, David E. Kresta

Dissertations and Theses

This study examines the role of local churches in neighborhood change, analyzing the relationship between Christian churches and changes in household median incomes from 1990 to 2010 in the census tract in which each church is located. Based on a nationally representative sample of churches from 2006 and 2012, the study uses hierarchical linear modeling and statistical matching techniques to analyze how key church characteristics such as social service involvement, social capital generation, residential patterns of attendees, and demographic composition are related to changes in neighborhoods. Two primary research questions were addressed: 1) How have patterns of church location changed …

Fatigue Characteristics Of New Eco Series Aluminum 7175 Alloy, Chinh Q.L. Vu

Dissertations and Theses

In this dissertation, the fatigue characteristics of three newly developed experimental compositions for aluminum 7175, with improved mechanical strength, that uses magnesium-calcium alloy instead of pure magnesium are studied.

Specimens of each variant were fabricated and subjected to fatigue life testing, fatigue life data analysis, and observation of their fracture characteristics through optical microscopy and scanning electron microscopy (SEM), and metallography to study their grains and surface characteristics.

Fatigue life testing shows all three variants have a fatigue strength that is approaching approximately 200 MPa. ECO7175v3 is shown to have the highest fatigue strength of approximately 220 MPa at 5x10 …