Digital Commons Network^™

An Experimental Investigation Into The Impact Of Acute Stress On Alcohol Craving Through Implicit Coping Motives, Douglas J. Glenn

Psychology Theses & Dissertations

Drinking to cope with negative emotions is associated with many negative alcohol-related outcomes such as increased alcohol use, drinking-related problems, and alcohol use disorders. An acute stressor is one example of a stimulus leading to negative emotions that an individual may wish to avoid. Research has shown that acute stress positively relates to drinking. Specifically, previous experimental studies have shown that individuals exposed to a stressor drink more alcohol and have stronger urges to drink than those not exposed to a stressor. Thus, it may be that drinking to cope explains why people experience alcohol cravings after experiencing a stressor. …

The Influence Of Emotion Regulation And Neural Cognitive Control On Distress Tolerance, Alicia L. Milam

Psychology Theses & Dissertations

Tolerance of negative emotions has been associated with transdiagnostic negative mental health outcomes. Theory and research implicate emotion regulation and cognitive control as factors in tolerance of negative emotions. But their unique contributions to tolerance of negative emotions and interdependency have been unclear due to methodological limitations. This study aimed to explicate cognitive and emotional factors affecting distress tolerance in a non-clinical sample of emerging adults. Undergraduate psychology students completed self-report measures of emotion regulation ability and tolerance of negative emotions. The N2 ERP component elicited by a Go-NoGo task was also used as a neurophysiological marker of cognitive control …

A Meta-Analysis Of Three Years Of Data On Outcomes Of Therapy Groups For Inmates In The Virginia Department Of Corrections, Abie Carroll Tremblay

Counseling & Human Services Theses & Dissertations

The Virginia Department of Corrections (VADOC) is responsible for about 28,000 inmates and 66,000 probationers and parolees annually. Mental health services are often conducted through therapeutic groups, many of which are manualized and based in cognitive behavioral therapy theory. In the three years, 2017 through 2019, VADOC conducted 172 therapeutic group therapy studies, and the resulting data, in the form of t-test scores, were made available for academic research. This meta-analysis investigated whether cognitive behavioral group therapy produced superior outcomes when compared to other theoretical orientations in group therapy in VADOC, if manualized group therapy treatments produced superior outcomes when …

The Impact Of A Crisis Intervention Team Program On Psychiatric Boarding, Kurtis Hooks

Counseling & Human Services Theses & Dissertations

Psychiatric boarding is the phenomenon of housing individuals in emergency departments while awaiting access to mental health services in the community. The expansion of psychiatric boarding is attributed to continued deinstitutionalization and under-resourcing of mental health services. Psychiatric boarding is also associated with deleterious outcomes for individuals in need of access to behavioral health services, facilities. There is limited research on programmatic efforts to reduce psychiatric boarding as it pertains to Crisis Intervention Team programs colocated in medical settings. Crisis Intervention Team (CIT) programs are community-based, multi-stakeholder partnerships that include dedicated assessment centers crisis response and referral. This study utilized …

Lean Application: An Assessment Of 5s On Employee Attitudes And Productivity, Nickolaos Dimitrios Karvounis

STEMPS Theses & Dissertations

This study examines the effect of the implementation of 5S on employee attitudes and productivity in an Asian based facility of a global manufacturing company. Utilizing an assessment of the 5S implementation in various areas of the facility and organizational performance data for each of those areas, a non-experimental, causal comparative approach is used to analyze the impact. The study concluded that statistically significant improvements from the implementation of 5S were found both in quality and product cost for this facility; however, the study also found statistical significance where the implementation of 5S led to a decrease in performance and …

Protection And Disturbance Mitigation Of Next Generation Shipboard Power Systems, Marounfa Djibo

Electrical & Computer Engineering Theses & Dissertations

Today, thanks to modern advances mainly in the power electronics field, megawatt-level electric drives and magnetic levitation are being integrated into the marine power grids. These technologies operate based on Direct Current (DC) power which require Alternating Current (AC) to DC conversion within the current grid. Medium-voltage Direct Current (MVDC) and Flywheel Energy Storage Systems (FESS) are the next state-of-the-art technologies that researchers are leaning on to produce, convert, store, and distribute power with improved power quality, reliability, and flexibility. On the other hand, with the extensive integration of high-frequency power electronic converters, system stability analysis and the true system …

An Analysis Of Effective Practice Strategies For The Performing Undergraduate University-Level Pianist, Elizabeth Ann Duncan

Music Theses & Dissertations

The intent of this study was to provide awareness of the trends surrounding piano practice pedagogy as determined by students either immersed in a university piano program or graduates thereof. The areas of study include a historical context of university music programs and the field of piano pedagogy, trends of imitative instruction, the importance of qualitative and quantitative practice, and the discovery of piano practice routines of collegiate pianists. This research project was approved for an IRB exemption by the Old Dominion University College of Arts and Letters.

Within this study, the subjects were either graduates of a collegiate piano …

Experiences Of Low-Income Student-Parents At A Community College During The Coronavirus (Covid-19) Pandemic, Marlena Yvonne Jarboe

Educational Leadership & Workforce Development Theses & Dissertations

Twenty-two percent of United States undergraduate students are parents (Cruse, et al., 2020). Referred to as student-parents, they are most likely to have low-incomes and attend community colleges (Cruse, et al., 2019; Gault et al., 2014). They tend to reduce their course loads and drop out of college due to work-life balance challenges even though they typically have better grade point averages than their non-parent peers (Cruse et al., 2019; Manze, et al., 2021; Peterson, 2016).

The problem to be addressed was how community college instructors, leaders, and legislators can support low-income student-parents’ persistence toward a postsecondary credential. There is …

Towards Characterizing Adversarial Opportunity And Behavior In Critical Infrastructure Network, Md Sharif Ullah

Electrical & Computer Engineering Theses & Dissertations

The growth of information and communication technology is constantly revolutionizing various domains, e.g., energy utility systems, healthcare, the internet of things, etc. This inception of widespread cyber technology enables reliability and first operability of the system, yet simultaneously imposed a risk of significant impact due to disruption of safe and secure operation. The attack surface is expanding, creating a cyber exposure gap which indicates a higher threat landscape and increased risk of compromise. Motivated by this increased threat exposure, this dissertation investigates the attack surface as a static and dynamic indicator of adversary propagation, seeking an efficient modeling paradigm to …

Hydrothermal Processes For Extraction And Conversion Of Biomass To Produce Biofuels And Value-Added Products, Anuj Hemant Thakkar

Civil & Environmental Engineering Theses & Dissertations

An integrated biorefinery approach based on subcritical hydrothermal processes was developed to maximize utilization of biomass components by producing multiple products. Biomass from various sources like agricultural waste (lignocellulose), food waste (spent yeast), and dedicated cultivation (micro-algae) was used in this research.

Corn stover (agricultural waste) was hydrothermally pretreated to remove lignin and xylan while preserving most of the glucan. The pretreated corn stover was utilized to produce levulinic acid (thermochemically) and fermentable sugars (biochemically). The solid residue generated during levulinic acid production was utilized to produce biocarbon electrode material. The results generated from the experiments were used for designing …

The Spooky Vein: The Reparative Gothic-Modern In The Works Of Richard A.W. Hughes, Corwin R. Baden

English Theses & Dissertations

This dissertation explores the dual nature of Richard A.W. Hughes as a marginalized Gothicist and modernist. This duality facilitated the development of the author’s reparative vision for a 20th-century world traumatized by planetary war. The present study utilizes close readings—both surface and symptomatic—combined with archival research to assert that Hughes fashions this reparative imperative consistently across his corpus: in his short stories, poems, novels, stage plays, and screenplays. In his short stories, this vision includes an embrace of the Stranger, a shadowy Gothic figure whose possessions, power, difference, and familiarity lead the human subject from contestation, through representation, and toward …

Genetically Engineered Thermosynechococcus Elongatus Bp1: Assessment Of Potential Biorisks And Biofuel Production, Thu Ho Anh Nguyen-Jones

Chemistry & Biochemistry Theses & Dissertations

According to the International Energy Outlook 2019, released by the U.S. Energy Information Administration, it is projected that the energy consumption will increase up to 50% between 2018 and 2050 worldwide. As fossil fuel being a finite source of energy with the risk of depletion, many countries are now facing an energy security crisis. Therefore, it is important to develop other renewable and sustainable energy sources that will allow countries to shift away from depending on fossil fuels. Among several types of renewable energy, biofuel production using genetically engineered cyanobacteria is capturing much interest due to its many advantages. Different …

A Testing And Experimenting Environment For Microscopic Traffic Simulation Utilizing Virtual Reality And Augmented Reality, Mahmud Hasan

Computational Modeling & Simulation Engineering Theses & Dissertations

Microscopic traffic simulation (MTS) is the emulation of real-world traffic movements in a virtual environment with various traffic entities. Typically, the movements of the vehicles in MTS follow some predefined algorithms, e.g., car-following models, lane changing models, etc. Moreover, existing MTS models only provide a limited capability of two- and/or three-dimensional displays that often restrict the user’s viewpoint to a flat screen. Their downscaled scenes neither provide a realistic representation of the environment nor allow different users to simultaneously experience or interact with the simulation model from different perspectives. These limitations neither allow the traffic engineers to effectively disseminate their …

Interpreting Summer In The Parks In The National Capital Area Of The National Park Service, Brendan J. Kane

Human Movement Studies & Special Education Theses & Dissertations

Washington D.C. has witnessed many watershed events throughout the history of the United States of America. One of these events was the Summer in the Parks (SITP) program organized by the National Park Service (NPS) from 1968-1976. Summer in the Parks was a community-based series of events including concerts, park visits, and exhibitions designed to quell racial tensions and promote park usage. Researchers have begun chronicling SITP, but have yet to explore how the story of SITP is conveyed by park interpreters to visitors and subsequently what themes are shared to inform public understanding of the historic relationship between NPS …

Synthesis And Characterization Of 4,6-Protected Glucosamine Derivatives And Branched Glycoconjugates, Jonathan Bietsch

Chemistry & Biochemistry Theses & Dissertations

Low molecular weight gelators (LMWGs) are small molecules that self-assemble in appropriate solvents to form three dimensional networks that immobilize the solvent, creating a supramolecular gel. The self-assembly of LMWGs occurs through non-covalent interactions such as hydrogen bonding, aromatic interactions, donor-acceptor interactions, Van der Waals interactions, hydrophobic forces, halogen bonding, etc. Due to self-assembly occurring through reversible non-covalent interactions, supramolecular gels can undergo a gel to solution transformation. Because of this, these materials can be sensitive to external stimuli such as temperature changes, pH changes, and other stimuli that effect non-covalent interactions. This makes the synthesis of LMWG’s an appealing …

Elementary Classroom Teachers’ Perceptions Of Redesigned Classroom Space: A Qualitative Case Study, Kristin Lee Pender

Teaching & Learning Theses & Dissertations

Classroom redesign is being recognized globally as necessary to better increase student’s enjoyment levels, engagement, collaboration, and learning. Instead of seeing traditional classrooms in a fixed setting where students are seated in rows facing the front of the room, classrooms are being arranged in multiple ways. As a result of this focus on redesigned learning spaces, there is a need to examine teachers’ perceptions about redesigned classroom spaces and understand the decisions behind their design. Thus, it is important to examine teachers’ perceptions of their classroom space to better understand if they consider their students learning needs, engagement levels, and …

Design, Synthesis And Characterization Of Carbohydrate Based Macrocycles, Photo Responsive Derivatives, And Glycoconjugates Based Low Molecular Weight Gelators, Surya Bahadur Adhikari

Chemistry & Biochemistry Theses & Dissertations

Functional glycoconjugates are important classes of compounds with many applications in different research fields. Our lab has been studying the synthesis and applications of different classes of glycoconjugates ranging from macrocycles to sugar heterocycle derivatives. Due to the importance of these compounds, our research is based on development of synthetic methods for various carbohydrate derivatives. This dissertation includes introduction and overview of projects, followed by the synthesis and studies of several different series of glycomacrolactones. The second project focuses on two classes of photoresponsive molecules, the coumarins and diarylethenes. The third project involves the synthesis and self-assembling properties of isoxazole-based …

Data-Driven Operational And Safety Analysis Of Emerging Shared Electric Scooter Systems, Qingyu Ma

Computational Modeling & Simulation Engineering Theses & Dissertations

The rapid rise of shared electric scooter (E-Scooter) systems offers many urban areas a new micro-mobility solution. The portable and flexible characteristics have made E-Scooters a competitive mode for short-distance trips. Compared to other modes such as bikes, E-Scooters allow riders to freely ride on different facilities such as streets, sidewalks, and bike lanes. However, sharing lanes with vehicles and other users tends to cause safety issues for riding E-Scooters. Conventional methods are often not applicable for analyzing such safety issues because well-archived historical crash records are not commonly available for emerging E-Scooters.

Perceiving the growth of such a micro-mobility …

Estimating The Risk Of Future Plastic Marine Debris Resulting From The Urban Coastal Built Environment, Kelly C. Jones

OES Theses and Dissertations

The growing urban built environment in the coastal zone poses an unknown risk to the marine biosphere as a source of marine debris. Plastic, since its introduction in the mid- 1900s, is now used in nearly all aspects of human life. Growth in human population and urbanization in coastal zones has resulted in the accumulation of large stocks of plastic in the coastal built environment, and these stocks are still growing exponentially. The coastal zone is exposed to a number of hazards including storms, tsunamis, and sea level rise, and most of these hazards are expected to change in the …

Space Charge Effects In Low Energy Magnetized Electron Beams, W. M. Sajini Anushika Kumari Wijethunga

Physics Theses & Dissertations

Magnetized electron cooling of the ion beam is one of the major approaches towards obtaining the required high luminosity in the proposed Electron-Ion Collider (EIC). To increase the cooling efficiency, a bunched electron beam with a high bunch charge and high repetition rate is required. However, these features can combine to enhance the collective interactions, such as the space charge effect. A magnetized electron beam was successfully generated at the Thomas Jefferson National Accelerator Facility (JLab) using a compact, 300 kV DC high voltage photo-gun with an inverted insulator geometry and bi-alkali antimonide photocathode. The beam magnetization was characterized using …

Phytoplankton Community Response To Upwelling Events: Distribution And Abundance Investigated Using Genomic Methods, Sveinn V. Einarsson

OES Theses and Dissertations

Upwelling events are known to support blooms of phytoplankton, important primary producers at the base of the oceanic food web. Phytoplankton community structure changes in response to upwelling support higher trophic level growth and increased efficiency of carbon export from the euphotic zone. While these events occur globally, this study examined upwelling in coastal regions, where alongshore winds can drive Ekman transport and upwelling of deeper waters. The two upwelling regimes examined were the California Current System and the Alaskan Beaufort Sea. In the California Current System, the relative diatom community composition was examined using 18S sequencing to determine how …

Spatiotemporal Variations Of Precipitation And Climate-Resilient Structure Design In Virginia, Xiaomin Yang

Civil & Environmental Engineering Theses & Dissertations

How to consider effects of climate change on the design and management of hydrology related infrastructure is crucial but remains a challenge for sustaining resilient society. To address this challenge, existing hydrologic design procedures may need to be revised and/or redeveloped to take into account the precipitation non-stationarity resulting from climate change. Using the state of Virginia as a testbed and advanced statistical techniques such as nonparametric test, spatial autocorrelation, linear regression, distribution fitting, and spatial interpolation, this dissertation developed an innovative framework to detect the historical spatiotemporal variations of various precipitation characteristics, namely maximum precipitation intensity, precipitation amount, simple …

A Copula Model Approach To Identify The Differential Gene Expression, Prasansha Liyanaarachchi

Mathematics & Statistics Theses & Dissertations

Deoxyribonucleic acid, more commonly known as DNA, is a complex double helix-shaped molecule present in all living organisms and hosts thousands of genes. However, only a few genes exhibit differential expression and play a vital role in a particular disease such as breast cancer. Microarray technology is one of the modern technologies developed to study these gene expressions. There are two major microarray technologies available for expression analysis: Spotted cDNA array and oligonucleotide array. The focus of our research is the statistical analysis of data that arises from the spotted cDNA microarray. Numerous models have been proposed in the literature …

On The P-Inner Functions Of ℓPA, James G. Dragas

Mathematics & Statistics Theses & Dissertations

Define ℓ^p_A as the space of all functions holomorphic over the unit disk whose Taylor coefficients are p-summable. Despite their classical origins and simple definition, these spaces are not as well understood as one might expect. This is particularly true when compared with the Hardy spaces, which provide a useful road map for the types of questions we might consider reasonable. In this work we examine the zero sets of ℓ^p_A, p ∈ (1;∞), as well as a notion of inner function that is consistent with the approach taken on numerous other function spaces. …

Identification Of Opportunity Barriers And Supports For Individuals Using Augmentative And Alternative Communication (Aac) And Stakeholders, Meredith K. Gohsman

Rehabilitation Sciences Theses & Dissertations

Individuals using augmentative and alternative communication (AAC) are supported by many AAC stakeholders and communication partners. Clinical decision making and AAC assessment models consider the capabilities and access needs of the individual using AAC, as well as opportunity barriers and supports imposed by communication partners and environments. The purpose of this research was to investigate opportunity barriers and supports identified by two critical AAC stakeholders: speechlanguage pathologists and caregivers. The first study investigated characteristics of AAC service provision reported by post-professional speech-language pathologists. Speech-language pathologists reported lack of perceived knowledge related to AAC service delivery, inconsistent use of AAC modalities, …

The Impact Of Muscular Strength On Cardiovascular Disease Risk Factors, Joel Ernest Harden

Human Movement Studies & Special Education Theses & Dissertations

The purpose of this study was to determine the associations between isokinetic leg muscular strength and cardiovascular disease (CVD) risk factor characterizations in Americans aged 50 and older. Using a publicly available dataset from the National Health and Nutrition Examination Survey (NHANES), a secondary analysis was conducted on participants (males ≥50 yrs; females ≥55 yrs; N=10,858) pooled from 1999 to 2002. CVD risk factors were determined using the American College of Sports Medicine (ACSM) cutoff values, with all nine ACSM risk factors analyzed. CVD risk factor characterization was determined by creating CVD risk factor profiles (i.e., the total number of …

Assessment Of The Hydrograv® Adapt Variable Height Secondary Clarifier Inlet At Hrsd Nansemond Treatment Plant, Matthew Poe

Civil & Environmental Engineering Theses & Dissertations

The Hampton Roads Sanitation District (HRSD) recently completed the first North American and center driven installation of the Hydrograv® Adapt Variable Height Secondary Clarifier Inlet (Adapt) at HRSD’s Nansemond Treatment Plant. This is a variable height inlet structure designed to decrease clarifier effluent turbidity and maintain low turbidity during high flow events. Low turbidity is achieved by feeding the secondary clarifier influent within the solids blanket during dry weather conditions and lifting the inlet structure during wet weather conditions to avoid disrupting the blanket. The Adapt clarifier was monitored alongside an identical fixed inlet clarifier to assess performance. Both clarifiers …

The Investigations Of Nps Modulated Immunity And Immunometabolism, Brittney Leigh Ruedlinger

Biomedical Sciences Theses & Dissertations

Cancers remain in the top noncommunicable diseases responsible for premature mortality. The heterogeneity among cancers and within tumors makes treating them ever more challenging. Our misfortune for developing cures is mocked by cancer, with the lowest probability of success (PoS) through clinical trials and FDA approval. At the basic level, there are generally two broad gaps impeding cancer eradication: the unidentified shared mechanism(s) exploited by all cancers and the therapeutic approach to intervene. Nanosecond pulse stimulation (NPS) offers a unique approach since its broad impacts intersect those often hijacked by oncogenesis. Metabolic pathways, known for dysfunctions among cancers, share a …

Mechanisms Of Stress Survival In Gram Positive Bacterial Pathogens, Asia Poudel

Chemistry & Biochemistry Theses & Dissertations

Anaerobic Gram-positive bacteria are not a well-characterized group but include many human pathogens that are resilient against stresses caused by the human immune system or by antibiotic treatment. This dissertation investigated the survival mechanisms of two clinically relevant Gram-positive organisms, Clostridioides difficile and Cutibacterium acnes under extracellular stresses. The response of the opportunistic skin pathogen Cutibacterium acnes to nanosecond electric pulses is characterized and found that growth in a biofilm, which usually protects bacteria from stress, renders this species more killable by this treatment. In addition, the stringent response (SR), a conserved bacterial stress survival mechanism, is studied in the …

The Effects Of Depression, Anxiety, And Stress On College Students: Examining The Role Of Mental Health Self-Efficacy On Willingness To Engage In Mental Health Services, Leeanna L. Golembiewski

Psychology Theses & Dissertations

Relative to younger ages, mental health problems are more prevalent among college students (Pedrelli et al., 2015) and nearly 20% of U.S college students are diagnosed each year with a mental health problem (Blanco et al., 2008). College students’ self-efficacy may influence mental health outcomes by impacting an individual’s decision to change their behavior and execute a course of action (Bresó et al., 2011). Mental health may also be influenced by the degree of willingness that an individual possesses, such that those who are more willing to seek mental health treatment are also more likely to follow through and seek …