Digital Commons Network^™

Highly Accurate Fragment Library For Protein Fold Recognition, Wessam Elhefnawy

Computer Science Theses & Dissertations

Proteins play a crucial role in living organisms as they perform many vital tasks in every living cell. Knowledge of protein folding has a deep impact on understanding the heterogeneity and molecular functions of proteins. Such information leads to crucial advances in drug design and disease understanding. Fold recognition is a key step in the protein structure discovery process, especially when traditional computational methods fail to yield convincing structural homologies. In this work, we present a new protein fold recognition approach using machine learning and data mining methodologies.

First, we identify a protein structural fragment library (Frag-K) composed of a …

Cryptic Herbivorous Invertebrates Restructure The Composition Of Degraded Coral Reef Communities In The Florida Keys, Florida, Usa, Angelo Jason Spadaro

Biological Sciences Theses & Dissertations

Coral reefs have been on a trajectory of decline for nearly a century due to a variety of factors that have contributed to the shift in these communities away from dominance by reef-building corals, with commensurate changes on community composition and function. Florida’s reefs are a compelling example of a degraded system that has undergone a phase shift, and thus offered an excellent model system for my study of the effects of grazing by cryptic herbivores on community composition and their potential restoration value. I had four major objectives: (1) determine the suitability of Maguimithrax spinosissimus for manipulating grazing intensity …

Harsh Parenting In Military Versus Civilian Families: Does Military Culture Moderate The Influence Of Socioeconomic Status And Race?, Tiren Antinette Parker

Psychology Theses & Dissertations

Harsh parenting techniques such as yelling and spanking are commonly used in the United States to discipline children, despite the evidence that harsh parenting has a negative sequalae for children that can persistent into adulthood. Socioeconomic status (SES) and race/ethnicity have been identified as two key determinants of harsh parenting. The stressors associated with military service and parenting within military culture place families at increased risk for harsh parenting and child maltreatment. Having a better understanding of how sociodemographic factors influence parenting behaviors within the military culture may help to develop psychoeducational and parenting programs as well as therapeutic interventions …

Arthropod Organic Anion Transporting Polypeptides In Tick-Borne Bacterial And Viral Infections, Vikas Kumar Taank

Biomedical Sciences Theses & Dissertations

Vector-borne diseases (VBDs) are human illness transmitted by an arthropod vector. World Health Organization (WHO) estimates that VBD has a huge impact worldwide that is responsible for affecting a billion people and causes 700,000 deaths annually. In recent years, there has been a continuous increase in the incidences of tick-borne diseases such as Lyme diseases and human anaplasmosis as reported by Center for Disease Control and Prevention. Very few reliable VBD control strategies have emerged till now. Transmission-blocking vaccines can provide effective management of VBDs but requires identification and characterization of novel vector-pathogen conserved molecules that play a significant role …

Submarine Groundwater Discharge In The Southern Chesapeake Bay: Constraints From Numerical Models, Charles Louis Carlson

OES Theses and Dissertations

Terrestrial and oceanic forces drive fluid flow within the coastal zone to produce submarine groundwater discharge (SGD). Groundwater flowing from the seabed serves as a significant pathway for contaminants and nutrients, producing an active biogeochemical reaction zone. In order to quantify the importance of SGD in geochemical and hydrologic budgets for the lower Chesapeake Bay, three coastal Virginia transects (southern Eastern Shore, Lafayette River, and Ocean View beach) with different topographic gradients were modeled using similar boundary conditions and consistent treatment of hydrogeologic layers. A sensitivity study was performed on the variables of recharge rate, seawater density, and hydraulic permeability. …

Sponge Community Biocomplexity, Competition, And Functional Significance In Hard-Bottom Habitats Of The Florida Keys, Fl (Usa), Marla Maxine Valentine

Biological Sciences Theses & Dissertations

Sponges can have powerful effects on ecosystem processes in shallow, tropical marine ecosystems and are an integral component of the bentho-pelagic cycle of nutrients, via filtering of dissolved and particulate organic matter from the water column. The diversity of marine communities is thought to play a determining role in intensity of ecosystem processes; thus the loss of taxa alters community function and by extension ecosystem processes. Coastal sponge populations worldwide are increasingly exposed to declining water quality that in several regions has resulted in mass sponge mortalities and reduced sponge diversity. In the Florida Keys (Florida, USA), for example, frequent …

Pollinator Visitation Frequency Associated With Native And Non-Native Plants In A Mid-Atlantic Piedmont (Usa) Urban Garden, Nicholas J. Ruppel, Saunders M. Riley, Ellis D. Mumford, Barbara L. Swedo

Virginia Journal of Science

The recent focus on the importance of native plants and their pollinators has highlighted the critical role of local species in their natural environment. As urban encroachment, climate change, and invasive species continues to threaten native habitats, it is increasingly important to promote the use of local green spaces as refugia for native plants and their pollinators. The aim of this project, therefore, was to identify and assess the visitation frequency of insect pollinators associated with an urban setting within the Piedmont region of Virginia, and compare their association with native versus closely-related but non-native summer-flowering plants. Several modes of …

Predicting Dissertation Methodology Choice Among Doctoral Candidates At A Faith-Based University, Rebecca Lunde, Kurt Y. Michael, Scott Watson, Kelly Paynter

Virginia Journal of Science

Limited research has investigated dissertation methodology choice and the factors that contribute to this choice. Quantitative research is based in mathematics and scientific positivism, and qualitative research is based in constructivism. These underlying philosophical differences posit the question if certain factors predict dissertation methodology choice. Using the theoretical framework of intersectionality, this predictive, correlational study used archival data to determine if biological sex, ethnicity, age, or religious affiliation predicts dissertation methodology choice. A logistics regression analysis was used to review 398 doctoral dissertations and determine if any of the criterion variables predicted dissertation methodology choice. After analysis, it was determined …

A Hierarchical Core Reference Ontology For New Technology Insertion Design In Long Life Cycle, Complex Mission Critical Systems, Kevin J. Michael

EMSE Doctoral Projects

Organizations, including government, commercial and others, face numerous challenges in maintaining and upgrading long life-cycle, complex, mission critical systems. Maintaining and upgrading these systems requires the insertion and integration of new technology to avoid obsolescence of hardware software, and human skills, to improve performance, to maintain and improve security, and to extend useful life. This is particularly true of information technology (IT) intensive systems. The lack of a coherent body of knowledge to organize new technology insertion theory and practice is a significant contributor to this difficulty. This research organized the existing design, technology road mapping, obsolescence, and sustainability literature …

Estimation Of Arterial Wall Parameters Via Model-Based Analysis Of Noninvasively Measured Arterial Pulse Signals, Dan Wang

Mechanical & Aerospace Engineering Theses & Dissertations

This dissertation presents a model-based method for estimating arterial wall parameters from noninvasively measured arterial pulse signals via a microfluidic-based tactile sensor. The sensor entails a polydimethylsiloxane (PDMS) microstructure embedded with 5×1 transducer array built on Pyrex/Polyethylene terephthalate (PET) substrate. The arterial pulse causes a time-varying deflection on the top of the PDMS microstructure, which registers as a resistance change by the transducer at the site of the artery.

Owing to the time-harmonic nature of its radial motion, the arterial wall is modeled as a second-order dynamic system. By combining this dynamic model with a hemodynamic model of blood flow, …

Study Of The Effects Of Silver Ions And Silver Nanoparticles On Embryonic Development, Martha Sharisha Johnson

Biomedical Sciences Theses & Dissertations

This dissertation focuses on the study of the toxicity of metal nanoparticles (NPs) and their ions on the development of zebrafish embryos, aiming to understand unique biological effects of NPs and ions, and design new in vivo assays to characterize the toxicity of these metal NPs and metal ions. Currently, the underlying molecular mechanisms of biological effects of nanomaterials are partially understood. Some studies assume that the toxic effects of NPs can be attributed to the release of their ions. We investigate the effects of silver NPs (Ag NPs) and silver ions (Ag+ ions) on the embryonic development of zebrafish …

Examining Validity Of Aha! Ratings As A Construct Of Insight, Ekaterina Y. Shurkova

Psychology Theses & Dissertations

Currently, there are two main views on insightful problem solving. Results of the studies supporting “business-as-usual” theory suggest that the processes involved in solving insight problems are the same as in analytical problem solving—slow, controlled, and effortful, while findings of the studies supporting the restructuring theory of insight suggest involvement of fast and automatic, one-trial-learning type of processes. The goal of the current study was to investigate the construct validity of the Aha! ratings, used in many studies as the measure of insight, by isolating its three components, effort, confidence, and suddenness, and examining their correlation with working memory span. …

Estimating Cognitive Workload In An Interactive Virtual Reality Environment Using Electrophysiological And Kinematic Activity, Christoph Tremmel

Biomedical Engineering Theses & Dissertations

As virtual reality (VR) technology continues to gain prominence in commercial, educational, recreational and research applications, there is increasing interest in incorporating physiological sensors in VR devices for passive user-state monitoring to eventually increase the sense of immersion. By recording physiological signals such as the electroencephalogram (EEG), electromyography (EMG) or kinematic parameters during the use of a VR device, the user’s interactions in the virtual environment could be adapted in real time based on the user’s cognitive state. This dissertation evaluates the feasibility of passively monitoring cognitive workload via electrophysiological and kinematic activity while performing a classical n-back task in …

Sustainability Of Study Abroad Programs At Rural Community Colleges, Michelle Lieberman

Educational Leadership & Workforce Development Theses & Dissertations

In this era of increased globalization, it is important to prepare students to participate in world issues and a worldwide economy. Study abroad increases knowledge regarding international affairs, boosts access to valuable cross-cultural experiences, and promotes academic success, retention (Raby, Rhodes, & Biscarra, 2014), cultural awareness (Clarke, Flaherty, Wright, & McMillen, 2009), and professional growth (Younes & Asay, 2003). Community colleges educate nearly half of the nation’s undergraduate students, but offer disproportionately few study-abroad programs (Hardy & Katsinas, 2007). Little existing research has documented the study abroad experiences of community college students. Even fewer studies have addressed sparse community college …

Adaptive Leadership Approaches In Online Education: A Study Of Trust Creation And Change Management In Higher Education, Andrew R. Casiello

Educational Leadership & Workforce Development Theses & Dissertations

The focus of this study was to determine which aspects of “Adaptive Leadership” are most commonly used by leaders in online education at doctoral research institutions where online education is playing a major role in enrollment. Within this study, the current state of higher education is reviewed and major changes in the financial, technological and competitive landscape are discussed. Challenges within the higher education context are addressed. These challenges include the increasing cost of a college education, decreased state support for public institutions, reduction of regional hegemony caused by technological advancements, increasing competition for students, and student demand for greater …

Comparing Higher Order Value Differences By Religious And Spiritual Association And Implications For Counseling: An Exploratory Study, Gregory C. Lemich

Counseling & Human Services Theses & Dissertations

The spiritual but not religious (SBNR) population in the U.S. has grown into a significant minority demographic (27%; Lipka & Gecewicz, 2017). Despite this emergence, scant literature has addressed this population and how it differs in values from others, specifically, how SBNR groups differ from those who identify as spiritual and religious (SAR), religious but not spiritual (RBNS), and not spiritual or religious (NSOR). To help this deficiency, this dissertation study explored the intersection of spirituality, religiosity, spiritual and religious categories (SRC; i.e. SAR, SBNR, RBNS, NSOR), and the theory of basic human values (Schwartz, 1992, 1994; Schwartz et al., …

Numerical Simulation Of Viscoelastic Flow In Micro/Nanochannels, Lanju Mei

Mechanical & Aerospace Engineering Theses & Dissertations

Micro/Nanofluidic devices often involve use of biological fluids or polymeric solutions that cannot be simply treated as Newtonian fluids. The numerical simulation for the complex fluids at micro/nanoscale presents a significant computational challenge, and the inclusion of electrokinetic body force further increases the complexity. Specifically, the well-known High Weissenberg Number Problem (HWNP) has become a challenge for the numerical simulation of viscoelastic fluid. This dissertation is aimed to develop a numerical tool to simulate the behavior of viscoelastic fluid in the micro/nanochannel. The most popular log-conformation reformulation to solve the HWNP is presented and implemented in a finite volume scheme. …

Anticipated Vs Experienced Work-Family Conflict: Newcomer Expectations And Early Socialization Outcomes, Seterra D. Burleson

Psychology Theses & Dissertations

Applying met expectations and newcomer socialization theory, congruence and discrepancy between anticipated work-family conflict (AWFC) and experienced WFC were examined in relation to job satisfaction, affective commitment, and turnover intent. It was hypothesized that when AWFC and WFC are in agreement outcomes are more favorable. Further, it was hypothesized that when the discrepancy is such that WFC is higher than AWFC outcomes are more favorable than vice versa. Data were collected from 205 adults, first as graduating seniors in college and again three months after starting their post-graduation jobs. Polynomial regression revealed that congruence between work interference with family (WIF) …

Familiar Forms, Strange Uses: Paratexts, Narrative Interventions, And The Queering Of Possible Worlds In Illicit Narratives Of Nineteenth-Century Britain, Jessica Saxon

English Theses & Dissertations

“Losing” one’s self in a story is one of the great pleasures of reading. Key to this act is the “transport” of the reader into the storyworld. Nineteenth-century British narratives offered various transport modes, including prefaces and footnotes designed to orient the reader to the storyworld and narrative interventions designed to align the reader with the values of that world. Yet this act of transport was fraught with tensions and anxieties in the nineteenth century. Worries about the dangers of reading, especially the dangers for women and the lower classes, abounded; much of the worry stemmed from fears that these …

Role Of Avian Hosts In Spread And Maintenance Of Borrelia Spp. And Rickettsia Spp. In Ixodes Spp. Collected Off Birds In Southeastern Virginia, Alexandra Cumbie, Erin Heller, Anna Phan, Zach Bement, Eric Walters, Holly Gaff, Wayne Hynes

Graduate School Posters

The role that birds play in the maintenance and the movement of ticks and tick-borne pathogens is an important area of research. The home ranges of resident bird species, and the migratory nature of others, can influence vector-borne disease ecology in a region. Of particular interest is the interaction of birds, both resident and migratory, with Ixodes spp. which are the primary vector species of Borrelia burgdorferi, the causative agent of Lyme disease. This genus has also been associated with the detection of other tick-borne pathogens, including Rickettsia rickettsii. In this study, Ixodes spp. were removed from birds captured …

Cryptic Lineages And A Population Damned To Incipient Extinction? Insights Into The Genetic Structure Of A Mekong River Catfish, Amanda S. Ackiss, Binh T. Dang, Christopher E. Bird, Ellen E. Biesack, Phen Chheng, Latsamy Phounvisouk, Quyen H.D. Vu, Sophorn Uy, Kent E. Carpenter

Biological Sciences Faculty Publications

An understanding of the genetic composition of populations across management boundaries is vital to developing successful strategies for sustaining biodiversity and food resources. This is especially important in ecosystems where habitat fragmentation has altered baseline patterns of gene flow, dividing natural populations into smaller sub-populations and increasing potential loss of genetic variation through genetic drift. River systems can be highly fragmented by dams built for flow regulation and hydropower. We used reduced-representation sequencing to examine genomic patterns in an exploited catfish, Hemibagrus spilopterus, in a hotspot of biodiversity and hydropower development- the Mekong River basin. Our results revealed the …

5th/6th Graders And Preservice Teachers Explore Engineering And Coding In A Combined After-School Technology Club/Educational Technology Course, Jennifer Kidd, Sam Sacks, Krishnanand Kaipa, Kelly Rippard

Teaching & Learning Faculty Publications

Elementary schools are increasingly encouraged to adopt STEM education efforts that include engineering and programming, yet pre-service teachers (PSTs) are not traditionally prepared to teach these subjects. This pilot study describes an innovative preparation experience designed to help PSTs gain experience and confidence in these areas. As part of an undergraduate educational technology course, PSTs led an after-school technology club at a local public school. PSTs enrolled in the course worked alongside fifth and sixth grade students on a series of collaborative design challenges that culminated in the creation of animal-inspired robots. The “WoW Club”, as it came to be …

A Case Study Of A Stem Teacher’S Development Of Tpack In A Teacher Preparation Program, Mary C. Enderson, Ginger S. Watson

Teaching & Learning Faculty Publications

This case study involved researching pre-service secondary STEM teachers’ development of TPACK by use of modeling & simulation applications. The main research question focused on how do self-reported TPACK measures align with demonstrated TPACK knowledge and skills. The study design was qualitative and included five secondary STEM pre-service teachers who were completing their program of study and teaching lessons in the field with secondary students. This particular brief paper reports on one of the pre-service STEM teachers in this study. Coding and analysis were carried out to search for characteristics of tasks that support development of TPACK in future teachers. …

2019 Undergraduate Research Symposium: Full Program, Honors College, Old Dominion University

Undergraduate Research Symposium

Full program with schedule and abstracts for the 2019 Undergraduate Research Symposium.

Correction: New Approaches For Assessing Squid Fin Motions: Coupling Proper Orthogonal Decomposition With Volumetric Particle Tracking Velocimetry (Doi:10.1242/Jeb.176750), Ian K. Bartol, Paul S. Krueger, Carly A. York, Joseph T. Thompson

Biological Sciences Faculty Publications

Squid, which swim using a coupled fin/jet system powered by muscular hydrostats, pose unique challenges for the study of locomotion. The high flexibility of the fins and complex flow fields generated by distinct propulsion systems require innovative techniques for locomotive assessment. For this study, we used proper orthogonal decomposition (POD) to decouple components of the fin motions and defocusing digital particle tracking velocimetry (DDPTV) to quantify the resultant 3D flow fields. Kinematic footage and DDPTV data were collected from brief squid, Lolliguncula brevis [3.1–6.5 cm dorsal mantle length (DML)], swimming freely in a water tunnel at speeds of 0.39–7.20 DML …

University Libraries Annual Report 2018-2019, Jennifer Hoyt (Ed.)

Libraries Reports and Documents

Annual Report of the Old Dominion University Libraries for 2018-2019. Contents define ways the Libraries engage:

1. Deal With at Length - Reorganization: Departments, Budgets, & Big Deals
2. To Begin and Carry On - Services, Instruction, Excellence, & Grand Spaces
3. A Crossroads Community - A Collaboration of Research, Exhibits, & Events
4. To Provide Occupation for Success - Publications, Presentations, & Representation
5. To Offer Opportunities for Engagement - Our Pledge to ODU Libraries & the ODU Community

Emerging Roles Of Virtual Patients In The Age Of Ai, C. Donald Combs, P. Ford Combs

Computational Modeling & Simulation Engineering Faculty Publications

Today's web-enabled and virtual approach to medical education is different from the 20th century's Flexner-dominated approach. Now, lectures get less emphasis and more emphasis is placed on learning via early clinical exposure, standardized patients, and other simulations. This article reviews literature on virtual patients (VPs) and their underlying virtual reality technology, examines VPs' potential through the example of psychiatric intake teaching, and identifies promises and perils posed by VP use in medical education.

College Of Health Sciences E-Newsletter, January 2019, Irvin B. Harrell

Ellmer College of Health Sciences Newsletters

January 2019 issue of Old Dominion University's College of Health Sciences Newsletter.

Automated Trading Systems Statistical And Machine Learning Methods And Hardware Implementation: A Survey, Boming Huang, Yuziang Huan, Li Da Xu, Lirong Zheng, Zhuo Zou

Information Technology & Decision Sciences Faculty Publications

Automated trading, which is also known as algorithmic trading, is a method of using a predesigned computer program to submit a large number of trading orders to an exchange. It is substantially a real-time decision-making system which is under the scope of Enterprise Information System (EIS). With the rapid development of telecommunication and computer technology, the mechanisms underlying automated trading systems have become increasingly diversified. Considerable effort has been exerted by both academia and trading firms towards mining potential factors that may generate significantly higher profits. In this paper, we review studies on trading systems built using various methods and …

Ideological Analysis Of Colorblindness In Get Out, Danielle Goldstein

OUR Journal: ODU Undergraduate Research Journal

This ideological analysis of the horror film, Get Out, directed by Jordan Peele investigates three major ideological aspects that are poignant to the film. The main ideology that will be examined is “colorblindness” also known as colorblind racism, which is the belief or attitude that denying the existence of race will cure racism and achieve racial equality. The two other sub-ideologies that will be examined are multicultural racism and post-racism, as they are both facets of colorblindness and work together to reinforce one another in society. Colorblindness is apparent in the film’s dialogue that reveal attitudes regarding interracial dating …