Digital Commons Network^™

Attitudes Of Employers Toward Exceptional Students (Ages 14-17) In Vocational Education Programs, Eunice A. Ervin

OTS Master's Level Projects & Papers

The purpose of this study was to evaluate attitudes towards exceptional education students participating in vocational employment internships within Prince William County public high schools.

Availability Of Tuition Assistance Funding Effects On Educational Pursuits, Geneva M. Dooley

OTS Master's Level Projects & Papers

The problem of this study was to investigate how the availability of tuition assistance funding effects the educational pursuits of marines stationed at Marine Corps Base Quantico during fiscal years 2013 and 2014.

Socioeconomic Status And Study Abroad: Participation, Academic Performance, And Graduation, Steven Douglas Bell

Educational Leadership & Workforce Development Theses & Dissertations

Research into retention, academic performance, and degree completion of study abroad program participants positively correlates with the assertion of Kuh, Kinzie, Schuh, Whitt, and Associates (2005) that study abroad is a high-impact educational activity. Literature on study abroad participation, academic performance, and graduation status is limited. This quantitative study adds to the literature on study abroad, and specifically examines to what extent participation, academic performance, and graduation at four and six years for study abroad students differ by socioeconomic status.

The Change Process And Sustainability: The Experience Of School Administrators, Heidi R. Brezinski

Educational Leadership & Workforce Development Theses & Dissertations

The aim of this study was to determine the perceptions and experiences of school administrators with change initiatives in their district to reveal the factors necessary for sustainability of effective change. The study was established on research concerning organizational change and change sustainability. For the purpose of this study, the research on organizational change was examined, while utilizing a lens of Michael Fullan’s Model for Change and Eight Elements of Sustainability. In this design, the perceptions and experiences of the school administrators within Coastal City School District were examined based on a 10-year timeframe of change initiatives within the district. …

'Home Was Congo': Refugees And Durable Displacement In The Borderlands Of 1,000 Hills, Erika Frydenlund

Graduate Program in International Studies Theses & Dissertations

As forced migrants linger at the borders of the world’s conflicts, refugees from the Democratic Republic of Congo in Rwanda remain in camps where they have waited for ‘durable solutions’ to their geographic and political existence for nearly two decades. Protracted displacement such as this results from processes at the local, state, regional, and international levels, with consequences reverberating each of these levels, including insecurity, expenditure of already limited resources, and strained interstate political relationships. As refugees’ stays extend to increasingly long periods of time, situations once assumed to be temporary take on a semblance of permanence. Forced displacement increasingly …

Dwelling In Time, Dwelling In Structures: Disintegration In World Politics, Jan Adam Nalaskowski

Graduate Program in International Studies Theses & Dissertations

This dissertation aims to propose a general theory of disintegration. This subject is not treated directly by some theoretical accounts and mistreated by others. European integration theories are fashioned to explain the greater integration process while game-theoretic approaches to withdrawals and secessions, even if treating disintegration directly, fail to include critically responsible factors. This dissertation offers a constructive criticism of both accounts. Since neither turning integration theories symmetrically around nor direct, game-theoretic assessment of disintegration help to provide sufficient explanation, it is suggested that the problem of symmetrical reversal and rational conduct must be revised.

Disintegration fails to follow the …

Wildlife Crime And Other Challenges To Resource System Resilience, Patricia Anne Raxter

Graduate Program in International Studies Theses & Dissertations

Although wildlife crime has exploded in Africa over the past decade —“commercial poaching” now kills an estimated eight percent of the continent’s elephant population each year—some governments have proven more successful than others at protecting wildlife and preserving habitats. To explain this variation, this study examines how the policies of three states (Kenya, Tanzania, and Botswana) have enhanced or undermined the resilience of the continent’s elephant ecosystem. Using the social-ecological system framework, the study illustrates how each state’s changing practices have either exacerbated the stresses wrought by wildlife crime or successfully protected local populations from poaching. The study finds that …

Energy As A Factor For Turkish - Russian Rapprochement, Saltuk Bugra Karahan

Graduate Program in International Studies Theses & Dissertations

This dissertation started with a simple question: What was the main source of Turkish-Russian rapprochement seen generally after the end of the Cold War, specifically within the last 15 years (2001-2015)? A review of the literature on the subject revealed three explanations for Turkish-Russian rapprochement: (1) Perception of the U.S. as a threat in the Black Sea and Caucasus region, (2) Deterioration of Turkey’s relations with the West, and (3) Turkey’s need for energy. Thus came the main question for this work: To what extent does Turkey’s need for energy play a role in Turkish-Russian rapprochement? Although each of the …

Kinematics And Hydrodynamics Of Cephalopod Turning Performance In Routine Swimming And Predatory Attacks, Rachel A. Jastrebsky

Biological Sciences Theses & Dissertations

Steady rectilinear swimming has received considerable attention in aquatic animal locomotion studies. Unsteady swimming movements, however, represent a large portion of many aquatic animals’ locomotive repertoire and have not been examined extensively. This study incorporates kinematic analyses of routine turning performance of brief squid Lolliguncula brevis and dwarf cuttlefish Sepia bandensis (Chapter 2), 3D velocimetry techniques to examine hydrodynamic turning performance of L. brevis (Chapter 3) and kinematic analyses of turning performance of L. brevis during predatory attacks on shrimp and fish prey (Chapter 4).

Both L. brevis and S. bandensis demonstrated high maneuverability, having the lowest measures of length-specific …

Spillover Effects Of Brand Alliance And Service Experience On Host Brands In Loyalty Program Partnerships, Gulfem Cigdem Kutlu

Marketing Theses & Dissertations

Three studies explored the consequences of loyalty program partnership on individual brands. The first study sought to determine what kinds of brand equity and category similarity would result in customers’ higher perceived attractiveness of and intention to join the loyalty program partnership. The study finds that higher category similarity increases both perceived attractiveness and joining intention towards a loyalty program partnership. When loyalty program partnership consisted of similar category businesses, individual brands also experienced changes to their brand equity levels. Low equity brands when partnered with high equity brands experienced a significant improvement in their brand equity levels. A high-high …

Improving Response Characteristics Of Split Ring Resonators Using Experimental Designs, Omer Faruk Keskin

Engineering Management & Systems Engineering Theses & Dissertations

The purpose of this thesis is to investigate the application of design of experiments approaches in the analysis of split ring resonators, and to compare two different approaches. The design parameters of the meta-material device are examined to study all the main effects, the two factor interactions, and the curvature effects. A full factorial design and a central composite design is utilized for the study. The results in improving split ring resonator design are discussed.

This study shows that the design of experiments approaches can effectively be utilized to examine the effects on the response values of a specific type …

Dental Consumers' Perceptions Of Dental Hygienists With Visible Tattoos, Amanda Brooke Verissimo

Dental Hygiene Theses & Dissertations

Purpose: The purpose of this study was to determine if visible tattoos affected the perceptions of dental consumers toward the professionalism and credibility of dental hygienists.

Methods: An 11 item, IRB approved investigator designed survey was administered online to 203 subjects invited to participate via a commercial web source. Surveys were randomized according to respondents' birth month. Participants viewed one of three photographs of a dental hygiene model wearing short-sleeved scrubs without a tattoo, with a large sleeve tattoo on the arm or with a small tattoo on the wrist. Participants scored each photograph on a 5-point Likert scale based …

Using Eye And Head Movements As A Control Mechanism For Tele-Operating A Ground-Based Robot And Its Payload, Kathryn C. Hicks

Computational Modeling & Simulation Engineering Theses & Dissertations

To date, eye and head tracking has been used to indicate users' attention patterns while performing a task or as an aid for disabled persons, to allow hands-free interaction with a computer. The increasing accuracy and the reduced cost of eye- and head-tracking equipment make utilizing this technology feasible for explicit control tasks, especially in cases where there is confluence between the visual task and control.

The goal of this research was to investigate the use of eye-tracking as a more natural interface for the control of a camera-equipped, remotely operated robot in tasks that require the operator to simultaneously …

Comparing Nutrient Recovery Via Rapid (Flash Hydrolysis) And Conventional Hydrothermal Liquefaction Processes For Microalgae Cultivation, Caleb Richard Talbot

Civil & Environmental Engineering Theses & Dissertations

Algal biofuels have the potential to provide a scalable source of renewable fuels in the near future. The high nutrient use in algae cultivation and its recovery and recycling is one of the challenges that may limit the scalability and sustainability of algal biofuels. The present study evaluates the use of Hydrolysate obtained after Flash Hydrolysis (FH) of Scenedesmus at 280 C as a nutrient source for microalgae cultivation. FH Hydrolysate nutrient recycling was compared with low temperature batch Hydrothermal Liquefaction (HTL) nutrient recycling. Oocystis and Scenedesmus were cultivated using Hydrolysate as a partial phosphorous (P) and nitrogen (N) source. …

Experimental And Predicted Behavior Of Frp Beam-Columns Including Retrofitting, Ali Al-Huazy

Civil & Environmental Engineering Theses & Dissertations

This thesis presents the outcome of a theoretical and experimental study of Fiber Reinforce Polymer (FRP) beam-columns with uniaxial bending and including retrofitting. The research involved the design and fabrication of a testing apparatus which was then used for a series of beam-column tests. Three different types of beam-column cross sections were used, namely, channel section, I-section, and square tube section. Six non-retrofitted beam-columns were tested in addition to two retrofitted ones. The members were subjected to an eccentric vertical load applied through a lever arm generating gradually increasing axial load and uniaxial bending moment up to the maximum load. …

New Engineering Approaches To Arrhythmias And Myocardial Infarction, Frency Varghese

Biomedical Engineering Theses & Dissertations

In this thesis, we present new engineering approaches to several important cardiac diseases. Chapter 1 considers the dynamics of arrhythmias. The most dangerous arrhythmias are reentrant arrhythmias, including ventricular fibrillation and ventricular tachycardia. During these arrhythmias, there are one or several rotating excitation waves present in the heart. Because of their shape, these waves are called scroll waves; their center of rotation is a one-dimensional curve called the filament. Filaments largely constrain the configuration of a scroll wave but are much simpler, so much effort has gone into describing scroll wave dynamics in terms of the dynamics of their filaments. …

Source-Specific Molecular Signatures For Light-Absorbing Organic Aerosols, Amanda Susan Willoughby

Chemistry & Biochemistry Theses & Dissertations

Organic aerosols (OA) are universally regarded as an important component of the atmosphere based on quantitative significance as well as the far-reaching impact they have on global climate forcing and human health. Despite the acknowledged importance, OA amounts and impacts remain the largest uncertainties regarding radiative forcing estimates. Incomplete chemical characterization of aerosol organic matter (OM) and a lack of concrete source apportionment is a major source of this uncertainty. The primary focus of this study is to provide much needed molecular details regarding ambient OA from key emission sources, and establish links between molecular and optical properties.

Complete chemical …

Perceptions Of Impediments To The Advancement Of Women Leaders In Community Colleges, Teresa Alley Yearout

Educational Leadership & Workforce Development Theses & Dissertations

As community college presidents, chief operating officers (CEOs), and other senior level administrators plan to retire, the critical demand for qualified leaders brings greater focus on previous trends and current statistics in community colleges leadership. These findings provide evidence of the continuing underrepresentation of women in senior level leadership positions. Further investigation examines women leaders’ perceptions of the barriers or impediments to their advancement into these leadership positions. The purpose of the current study was to examine the perceptions of impediments of women community college leaders in a variety of institutional settings (rural, suburban, urban).

The literature provided an inventory …

Two-Year And Four-Year Tertiary Education: Measuring Human Capital Effects On Economic Growth In Developing And Developed Countries With The Uzawa-Lucas Model, Darryl M. Tyndorf

Educational Leadership & Workforce Development Theses & Dissertations

Tertiary education is believed to be a driver of economic development through the relationship between human capital development and economic output. Global massification efforts of tertiary education have led to increased global demand. Countries with limited tertiary education systems, like developing countries, have employed policies to increase domestic tertiary education opportunities instead of sending students abroad. Many tertiary education policies have focused on importing tertiary education from countries with established tertiary education systems. Import efforts first emphasized university models, but limited success prompted the import of more flexible short-cycle education modeled after the United States’ community college system. Limited empirical …

Behavior And Strength Of Pultruded Frp I-Section Columns Including Uniaxial And Biaxial Bending, Emad M. Amin

Civil & Environmental Engineering Theses & Dissertations

This thesis presents the outcome of a study of the behavior and strength of pultruded glass fiber reinforced polymer (FRP) I-section columns including uniaxial and biaxial applied bending moments. Also included in the study is a critical assessment of ASCE-LRFD Pre-standard for pultruded FRP structures in view of the rigorous analysis presented herein. The theoretical solution is based on a system of three coupled differential equations of equilibrium combined with pinned flexural and torsional boundary conditions. Effects of induced warping due to second-order terms as well as initial out-of-straightness are accounted-for in the governing differential equations. Detailed investigations into the …

An Exploration Of Infant And Toddler Child Care Consultation: A Multiple Case Study, Christine Marie John

Communication Disorders & Special Education Theses & Dissertations

This qualitative, multiple case study was an exploration of the professional development (PD) experience of consultation as it occurred within infant and toddler child care settings. Consultation is dependent upon the establishment of a relationship between the consultant and the consultee and offers opportunities for professional growth and enhanced quality child care. This researcher followed four infant and toddler child care consultants working with child care centers through a quality enhancement PD program in a Mid-Atlantic state. Within each of the four participating centers, a member of the administration and one infant and/or toddler caregiver along with their consultant contributed …

Employee Opportunism In Two Early Modern British Trading Companies, Robert Franklin Unger

History Theses & Dissertations

The English East India Company and the Hudson’s Bay Company were the most prominent of a score or more of seventeenth and eighteenth century joint stock European trading companies whose merchants conducted their trading activities around the globe. The extraordinary distances and length of time that separated the London directorate committees of both companies from their distant employees was perhaps their greatest managerial challenge. Neither company could directly supervise their employees at their remote trading concessions, whether it was India and the East Indies for the East India Company or sub-arctic North America for the Hudson’s Bay Company.

Because of …

Diabetes Status, Predisposing, Enabling, And Oral Health Illness Level Variables As Predictors Of Preventive And Emergency Dental Service Use, Sabha Alshatrat

Health Services Research Dissertations

The purpose of this study was to clarify the relationship between diabetes and dental service use. This study addressed the question of whether individuals with diabetes are more or less likely to utilize dental services, measured in terms of preventive and emergency services during the past year. A cross-sectional study was conducted to assess the contributions of diabetes status to dental service use, relative to the contributions of Andersen and Newman Framework of Health Services Utilization dimensions (predisposing, enabling, and illness variables) in predicting dental service utilization during the past year using a nationally representative sample from a 2001-2002 National …

Multiple Point Constraint (Mpc)-Based Variable Node Super-Element, Mohamad Eftekharjoo

Mechanical & Aerospace Engineering Theses & Dissertations

The multiple point constraint (MPC)-based variable node element is introduced in this study to handle mismatched meshes between sub-domains in finite element analysis. The MPC-variable node element is a collection of a group of elements. The compatibility condition along the interface boundary is imposed along the edge of these elements through Lagrange multipliers. The Elimination method is then used to remove the effects of the dependent nodes in these elements to produce a single MPC-based variable node element. The derived variable node elements are applied to solve two plane strain problems in order to validate the accuracy of the proposed …

Essays On International Risk-Return Trade-Off Relations, Liang Meng

Finance Theses & Dissertations

This dissertation consists of two essays on the international risk-return trade-off relations. The first essay is titled “The Role of the US Market on International Risk-Return Trade-Off Relations” and the second essay is titled “The Role of Investor Sentiment on International Risk-Return Trade-Off Relations”.

In our first essay, we study the intertemporal risk-return trade-off relations based on returns from 18 international markets. Our main contribution is that we find the US market plays an important role affecting the international risk-return trade-off. We present striking new empirical evidence that the inclusion of US market variables significantly changes the estimated risk-return trade-off …

The Effects Of Urbanization On Tick Parasitism Rates In Birds Of Southeastern Virginia, Erin Leigh Heller

Biological Sciences Theses & Dissertations

The coastal region of southeastern Virginia is one of the largest urban areas along one of North America’s migratory flyways. Because hundreds of avian species use this flyway, understanding factors affecting birds and their health is of paramount concern. Within this region, 14 species of ticks have been documented, all of which may serve as vectors of mammal (including human) pathogens. By sampling birds at sites of varying levels of urbanization within the coastal southeastern urban matrix, I studied the relationship between ticks and their avian hosts, and how this relationship varies seasonally. Mistnets were set-up at five permanent sites …

Synthesis, Characterisation, Electrochemical, And Spectroscopic Studies Of Cobaloximes: Unique Clues Of Cobalt(I) Species In Various Solvents, Michael John Celestine

Chemistry & Biochemistry Theses & Dissertations

With the dwindling amount of fossil fuels in the world’s reserve is said to run out in the future. The use of alternative fuels such as hydrogen can be produced from renewable sources. One source is the use of first row transition metal complexes that can harness the power of the sun to reduce protons to hydrogen. In this thesis we investigated a well-known hydrogen evolution catalyst in a quest to understand the behavior of different oxidation states that occur during the catalytic cycle.

In an attempt to synthesize a binuclear ruthenium(II) complex, [{Ru(phen)2}2{µmes(1,4-phO-Izphen)3}](PF6)4, as a possible photosensitizer for the …

An Approach For The Development Of Complex Systems Archetypes, Walter Lee Akers

Engineering Management & Systems Engineering Theses & Dissertations

The purpose of this research is to explore the principles and concepts of systems theory in pursuit of a collection of complex systems archetypes that can be used for system exploration and diagnostics. The study begins with an examination of the archetypes and classification systems that already exist in the domain of systems theory. This review includes a critique of their purpose, structure, and general applicability. The research then develops and employs a new approach to grounded theory, using a visual coding model to explore the origins, relationships, and meanings of the principles of systems theory. The goal of the …

Experiences Affecting Associate Degree In Nursing Program Graduates’ Decisions To Pursue A Bachelor Of Science In Nursing Degree, David P. Bartos

Educational Leadership & Workforce Development Theses & Dissertations

This qualitative research study explored those experiences that influenced associate degree in nursing (ADN) graduates’ decisions to pursue a bachelor of science in nursing degree (BSN) after they had graduated from a two year nursing program at a state community college in a Southeast region state. The research design used was phenomenological research tradition, using semi-structured interviews to identify participants’ experiences, and Moustakas’ phenomenal data analysis to analyze the collected narrative data to determine themes from the acquired experiences. ADN registered nurses (RN) who had graduated from a specific state community college nursing program participated in this study. Life experiences …

Groundwater Thresholds For Root Decomposition And The Relation To Barrier Island Ecological State Changes, Matthew Lee Smith

Biological Sciences Theses & Dissertations

Barrier islands off the eastern shore of Virginia exhibit distinct habitats that abruptly transition between periodically brackish/freshwater marshes, wooded swales, and sparsely vegetated dunes. There is strong evidence that the plant communities and ecosystem processes occurring in each habitat are primarily influenced by nutrient availability and the distance between two of the three free surfaces: land and freshwater. At the Virginia Coast Reserve-Long Term Ecological Research Site in Virginia, USA, thresholds to belowground decomposition rates were identified by measuring decay of native roots and rhizomes at 32 elevations in relation to mean annual groundwater levels (-0.356 – 1.937 m). Negative …