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Biotic And Abiotic Characteristics Influencing Nest Location And Trophic Relationships Of The Fungus-Growing Ant Trachymyrmex Septentrionalis (Formicidae: Attini), Jonathan Paul Howell

Biological Sciences Theses & Dissertations

Trachymyrmex septentrionalis represents the only species of fungus-growing ant in the southeastern United States. T. septentrionalis cultivates a symbiotic fungus on which the ants feed. Worker ants collect plant and animal debris to feed the fungus. These ants are common in Florida, but increasingly scarce as they near the northern extent of their range in New Jersey. Colonies of T. septentrionalis occur in patches throughout Blackwater Ecological Preserve, a longleaf pine forest in southeastern Virginia. Blackwater Ecologic Preserve is a 129 hectare tract of land, located in Isle of Wight county, that is undergoing a regimen of controlled burning to …

Effect Of The Herbivorous Channel Clinging Crab (Mithrax Spinosissimus) On Patch Reef Algal Communities In The Florida Keys, Florida (Usa), Angela M. Mojica Osorio

Biological Sciences Theses & Dissertations

Coral reefs worldwide are undergoing dramatic habitat modification from coral to macroalgal dominance due to water pollution, coral diseases, global. warming, and the loss of herbivores. This phase-shift bas been particularly severe on Caribbean reefs due in large measure to the decline of piscine and echinoderm grazers, whose presence appears crucial for stemming the decline of coral reefs and enhancing their resilience. Virtually unknown, however, is the role of other macrograzers in coral reef ecosystems. This is the first study to examine the feeding ecology and grazer effect of the herbivorous West Indian spider crab (Mithrax spinosissimus) on inshore patch …

Design Development And Implementation Of A Resiliency-Based After-School Program For Sixth Grade Students Through Recreational Activities, Takeyra Collins

Human Movement Studies & Special Education Theses & Dissertations

Fostering youth development is the responsibility of caring adults who have the opportunity to provide support, opportunities, and services in a safe and enlightening environment. The purpose of the current study was to determine the benefits of a resiliency-based after-school program and to examine the design, development and implementation of recreational activities that were developed to instill resiliency traits in at-risk youth. The after-school program has resiliency-based activities for sixth graders that were facilitated by undergraduate college students at a public middle school in Norfolk, VA. A 40-item questionnaire, the Resiliency Attitudes and Skills Profile (RASP), was used to gather …

Prostate Cancer Biomarker Identification: A Comparative Study, Wenjuan Jiang

Computational Modeling & Simulation Engineering Theses & Dissertations

With the current development of proteomics techniques, the discovery of potential molecular biomarkers for early detection of prostate cancer has been greatly improved. In this thesis, we implemented five classifiers including the support vector machine (SVM), Bayesian Classifier, Decision Tree, Random Forest and the Multilayer perceptron (MLP) to test their effectiveness in prostate cancer biomarker identification using matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) tissue imaging data. The classifiers were utilized to discriminate cancer mass spectra from normal ones for the data collected at the Eastern Virginia Medical School (EVMS). There are 94 7 spectra from normal tissues and 27 from …

Hydrodynamics Of Pulsed Jetting In Juvenile And Adult Brief Squid Lolliguncula Brevis: Evidence Of Multiple Jet 'Modes' And Their Implications For Propulsive Efficiency, Ian K. Bartol, Paul S. Krueger, William J. Stewart, Joseph T. Thompson

Biological Sciences Faculty Publications

The dynamics of pulsed jetting in squids throughout ontogeny is not well understood, especially with regard to the development of vortex rings, which are common features of mechanically generated jet pulses (also known as starting jets). Studies of mechanically generated starting jets have revealed a limiting principle for vortex ring formation characterized in terms of a 'formation number' (F), which delineates the transition between the formation of isolated vortex rings and vortex rings that have 'pinched off' from the generating jet. Near F, there exists an optimum in pulse-averaged thrust with (potentially) low energetic cost, raising the question: do …

Life Drawing With Gross Anatomy Medical Students And Implications For Art Therapy, Elliott Addesso

EVMS School of Health Professions Theses & Dissertations

It is important to incorporate humanities training into medical education in order to enhance the potential for humane and ethical interactions among physicians. In this study, a life drawing studio course was led by an art therapy graduate student to explore the effects of a life drawing course on medical students concurrently enrolled in Gross Anatomy. Based on students’ perceptions of their experience in the life drawing class, theoretical implications for the practice of art therapy in studio applications were discussed.

Five medical students participated in the course on a voluntary, non-credit basis. The course consisted of seven meetings and …

Exploring American Indian Adolescents’ Needs Through A Community-Driven Study, Emily Gordon Basto

EVMS School of Health Professions Theses & Dissertations

The current higher rates of substance use and abuse for Native American adolescents compared to non-Natives is an issue that requires attention. There are a variety of risk factors that lead to this current situation, including discrimination and acculturation pressures. Past treatment options have been limited with American Indians and have not incorporated community involvement. Art therapy has been utilized in substance abuse programs and with American Indian populations; however, art therapy has been limited in taking a community-driven approach. As art therapy and community involvement are seen as culturally relevant, together they may serve as a model for assessing …

Attachment Styles And Children In Foster Care: A Study Involving Art Therapy Evaluation, Abigail Johnson

EVMS School of Health Professions Theses & Dissertations

This case study explored the attachment style and perceptions of family, from the perspective of children in the foster care system, through the use of art therapy evaluative methods. The participants for this study included two half-sisters in the second and fourth grades. The Art Therapy-Projective Imagery Assessment (AT-PIA) was adapted and used to construct a well-rounded understanding of each client. Within the adapted AT-PIA, the Human Figure Drawing and the Bird’s Nest Drawing were evaluated using rating schemes. A dyad session was held with the two participants, where a Safe Place Sculpture was created. Review of the artwork revealed …

Pulsed Jet Dynamics Of Squid Hatchlings At Intermediate Reynolds Numbers, Ian K. Bartol, Paul S. Krueger, William J. Stewart, Joseph T. Thompson

Biological Sciences Faculty Publications

Squid paralarvae (hatchlings) rely predominantly on a pulsed jet for locomotion, distinguishing them from the majority of aquatic locomotors at low/intermediate Reynolds numbers (Re), which employ oscillatory/undulatory modes of propulsion. Although squid paralarvae may delineate the lower size limit of biological jet propulsion, surprisingly little is known about the hydrodynamics and propulsive efficiency of paralarval jetting within the intermediate Re realm. To better understand paralarval jet dynamics, we used digital particle image velocimetry (DPIV) and high-speed video to measure bulk vortex properties ( e. g. circulation, impulse, kinetic energy) and other jet features [ e. g. average and …

The Chakra Energy System And Art Therapy: A Heuristic Study, Linda Scalise

EVMS School of Health Professions Theses & Dissertations

The chakra system, an Eastern philosophy relating to an individual’s health, energy, and consciousness, has been integrated into the healing practices of psychology, meditation, yoga, and alternative medicine. Dale (2005), Judith (1996), and Myss (1996) described the chakra energy system as focal points embedded within the human energy system that regulate all components of the self. Researchers in complementary therapies and energy medicine have long been interested in how the integration of this system affects the progression of disease, human behavior, and emotional disturbances. However, although rich in symbolism and metaphor, no literature has been found demonstrating the use of …

Paternal Involvement As Determined By Paternal Motivational Social Support And Stress Skills And Self-Confidence And Institutional Factors, Jessica E. Ladage

Psychology Theses & Dissertations

No abstract provided.

An Examination Of The Combined Impact Of Exposure To Intimate Partner Violence And Child Abuse Or Neglect On Juvenile Delinquency, Tracie R. Johnson

Sociology & Criminal Justice Theses & Dissertations

The purpose of this research is to examine the relationship between children's exposure to intimate partner violence and child abuse or neglect on juvenile delinquency. Much of the research on this topic suggests that a disturbed home life can have a significant impact on delinquency among children. This study explores patterns of delinquency among a large group of children in the Seattle Washington area (n=877). Gender differences in violent and nonviolent delinquency are examined as well as the impact of witnessing intimate partner violence in the home is tested. Analyses reveal that gender, race, and exposure to intimate partner violence …

Analysis Of Electroencephalogram Signals For The Identification Of Mental Tasks, My Thy Thi Tran

Electrical & Computer Engineering Theses & Dissertations

Electroencephalogram (EEG) signals can be used for implicit communication such as to control robots or medical equipment by brain activity or to detect an individual's intentions of committing premeditated crimes. An EEG based brain-computer interface allows paralyzed patients to express their thoughts. However, biological and technical artifacts heavily interfered with EEG signals due to blinking of the eyes, muscle activities and line noise. Sometimes the noise interference due to signal artifacts becomes more prominent than the information content. This thesis investigates novel feature extraction methodologies in EEG signals to represent different thought processes and employs neural network-based pattern classification techniques …

A Qualitative Inquiry Of Conceptualized Heterosexuality And Its Influence On The Counseling Process, Breyan N. Haizlip

Counseling & Human Services Theses & Dissertations

With CACREP's increasing attention to majority cultural group memberships and its influence on trainee self-awareness and the counseling relationship (see CACREP 2001/2009), heterosexually-identified counselors have little or no opportunity to increase awareness of their own sexuality, creating challenges when working with clients of various sexual identities. The purpose of this article is to present a qualitative analysis of conceptualized heterosexuality and its influences on the counseling process. A model of the process by which heterosexually-identified counselors conceptualize their heterosexual identity and its influences the counseling process is proposed. Results suggest that providing counselor trainees an opportunity to explore the relationship …

A Phenomenological Case Study Of The Multicultural Counseling Experience Of Students And Faculty In Relation To Their Perceptions Of Their Multicultural Competency And Cacrep Standards, Nial P. Quinlan

Counseling & Human Services Theses & Dissertations

The shifting population demographics of the United States are an unmistakable sign that the work of professional counselors and educators will continue to see an increase in the diversity of their client populations. It can be surmised, that paralleling this population change will be a subsequent increase in the demand for multicultural sensitive education and counseling, with particular attention being given to oppressed and marginalized groups who have been traditionally underserved. The counseling profession, guided by the American Counseling Association's (ACA) Code of Ethics, has unequivocally stated that professional counselors need to be proficient at providing multicultural competent counseling services …

A Grounded Theory Of School Counselors' Conceptualizations Of Their Training Regarding Adolescent Mental Health Issues, Cynthia Theresa Walley

Counseling & Human Services Theses & Dissertations

There is a paucity of research regarding master's level school counselors' conceptualizations of their training regarding recognizing and responding to adolescent mental health issues. The purpose of this study was to propose develop a theory that illuminates new school counselors' conceptualizations of their training related to gaining knowledge in recognizing and responding to adolescent mental health issues. To accomplish this, eight school counselors in the southeastern Virginia area participated in two rounds of individual interviews and a reflective writing activity. Utilizing a qualitative grounded theory design, both the interviews and the reflective writing were analyzed to extrapolate themes about their …

Spatiotemporal Estuarine Water Quality Parameterization Using Remote Sensing And In-Situ Characteristics, Kwisun Park Yu

Civil & Environmental Engineering Theses & Dissertations

This dissertation develops a new paradigm in a water quality monitoring approach to parameterize spatiotemporal estuarine water quality with sustainable reliability, less cost and less time. A key underpinning of this paradigm of the spatiotemporal estuarine water quality parameterization is various water quality parameters' interrelationship with ambient water temperature as a common factor, their time dependent characteristics, and spatiotemporal characteristics of remote sensing. It has two core models to provide input data of water quality parameterization model in a system; the transfer function models of the physical system and an analytical temperature time series model. The objective of this dissertation …

The Effects Of Elaborative Interrogation And Summarization On Student Comprehension, Retention, And Satisfaction In Online, Self-Paced Instruction, Heather M. Brown

Teaching & Learning Theses & Dissertations

The purpose of this study was to investigate the effects of two elaboration strategies, elaborative interrogation questioning (EIQ) and summarization, on student comprehension, retention, and satisfaction in a self-paced online environment. There were four treatment groups: (a) Control (no treatment); (b) EIQ only; (c) Summarization only; and (d) EIQ and Summarization. Both undergraduate and graduate students (mean age = 25.84 years) volunteered and completed the study (N=191).

Results revealed a significant interaction between strategy type and age on comprehension. Older participants in the Control and EIQ/Summarization strategy groups comprehended more than the younger participants, and the younger participants in the …

Jamesonian Analysis Of Contemporary American Rape Autobiographies, Michele Laaksonen

English Theses & Dissertations

Sexual assault is widespread throughout America; unfortunately, because this crime breeds shame in its victims, most sexual assault victims never tell anyone. But, as Confessional writing became popularized in contemporary society and more victims felt the need and space to speak out, the rape autobiography developed as an essential tool in understanding the epidemic of sexual violence and the ways in which victims internalize their experiences.

Since sexual assault is a societal problem, and narratives arc a tool for victims to express themselves and expose the sexual violence within a society, rape narratives should be analyzed as windows into American's …

Factors Affecting Adult Foraging And Chick Growth Of Adélie Penguins (Pygoscelis Adeliae) Off The Western Antarctic Peninsula: A Modeling Study, Erik W. Chapman

OES Theses and Dissertations

Coupled individual-based models that simulate Adélie penguin ( Pygoscelis adeliae) chick growth and adult foraging behavior during the chick growth period were developed and used to explore factors that influence chick fledging mass and adult foraging energetics off the western Antarctic Peninsula (WAP). Adélie penguin colonies in this region are undergoing changes in population size that have been correlated with climate-driven alteration of the marine and terrestrial environment. Simulations were selected to highlight possible mechanistic linkages between climate variability and chick growth and adult foraging processes. These processes were the focus of this study because chicks that fledge at …

Phosphorylation Of The Estrogen Receptor Alpha (Erα) At Serine 118 By Phospho-P44/42 Mapk And Regulation By Estrogen And Progesterone In Human Uterine Leiomyoma Tissue And Cells, Tonia Lakisha Hermon

Theses and Dissertations in Biomedical Sciences

It is thought that the growth of uterine leiomyomas may be mediated by the interaction of estrogen receptor alpha (ERα) and growth factor pathways and that phosphorylation of ERα at serine 118 (ERα-phospho-Ser118) is important in this interaction. In tissue, immunoblotting and immunohistochemistry were used to investigate the expression of ERα-phospho-Ser118, phosphorylated p44/42 mitogen-activated protein kinase (phospho-p44/42 MAPK), and proliferating cell nuclear antigen (PCNA) in human leiomyoma and myometrial tissues during the proliferative and secretory phases of the menstrual cycle. In vitro studies to assess proliferation of uterine leiomyoma (UtLM) and uterine smooth muscle (UtSMC) cells and expression of ERα-phospho-Ser118 …

A Pilot Study To Explore The Use Of Expressive Writing To Reduce Anxiety And Psychological Threat In An Academic Setting, Cynthia Delores Jenkins

Counseling & Human Services Theses & Dissertations

The purpose of this study was to investigate if the use of Pennebaker's short-term expressive writing intervention would have a positive effect on the academic performance of a group of third semester underperforming freshmen. This is a relatively brief and simple intervention pioneered by J. W. Pennebaker (1997) who conducted numerous studies using the procedure. Most of the research has involved having subjects write about traumatic, stressful or emotional events for 15–20 minutes (the maximum) over 3–5 days. In contrast, the studies by Wilson (2006) and Cohen et al (2006) used self-affirmations for writing. For this study self-affirmation directions were …

Effects Of Hze Irradiation On Chemical Neurotransmission In Rodent Hippocampus, Mayumi Machida

Theses and Dissertations in Biomedical Sciences

Space radiation represents a significant risk to the CNS (central nervous system) during space missions. Most harmful are the HZE (high mass, highly charged (Z), high energy) particles, e.g. ⁵⁶Fe, which possess high ionizing ability, dense energy deposition pattern, and high penetrance.

Accumulating evidence suggests that radiation has significant impact on cognitive functions. In ground-base experiments, HZE radiation induces pronounced deficits in hippocampus dependent learning and memory in rodents. However, the mechanisms underlying these impairments are mostly unknown.

Exposure to HZE radiation elevates the level of oxidation, resulting in cell loss, tissue damage and functional deficits through direct ionization …

A Bio-Optical Model For Syringodium Filiforme Canopies, Margaret A. Stoughton

OES Theses and Dissertations

Seagrasses are significant ecological and biogeochemical agents in shallow water ecosystems throughout the world. In many regions, seagrass meadows occupy a sufficient fraction of the coastal zone, and generate optical signatures that can be observed from space. Bio-optical models of light absorption and scattering by submerged plant canopies for certain species such as Thalassia testudinum and Zostera marina have successfully modeled the plane irradiance distribution and photosynthesis within the submerged canopies. Syringodium filiforme differs &om T. testudinttm and Z marina, in leaf morphology and canopy architecture. The objective of this study was to develop a radiative transfer model that …

Characterization Of Antibiotic Resistance In Vibrio Cholerae Isolated From Ships' Ballast And Other Environmental Sources, Frank Kornegay Thomson Iii

OES Theses and Dissertations

Ships' ballast has been implicated as a vector in the dispersal of invasive species into new environments. Numerous cases have been documented for the introduction of macroorganisms via ballasting operations, but what is less known is the role of ballast water and residuals in the spread of potentially harmful microbes, especially with reference to novel genotypes. Of particular interest are the genes encoding for various forms of antibiotic resistance, many of which are carried on mobile genetic elements. A four-year sampling effort has yielded over 300 putative isolates of Vibrio cholerae from ships' ballast tanks and various environmental sources, of …

Interdependent Regulation Of Cytomegalovirus Proteins In Complex, Lisa L. Bolin

Theses and Dissertations in Biomedical Sciences

Human cytomegalovirus (HCMV) is a ubiquitous herpesvirus that causes significant morbidity and mortality in the immune compromised. Using the mutine cytomegalovirus (MCMV) model, we identified two genes, M140 and M141, which are determinants of macrophage tropism. Monocytes/macrophages are a critical cell type for cytomegalovirus (CMV) pathogenesis as sites of viral latency and by supporting viral replication and disseminating virus throughout the body. We previously found that the localization of the M140/M141 gene products (pM140/pM141) is different when the proteins are co-expressed as compared to their individual expression. When the proteins are individually expressed pM141 localizes diffusely throughout the cytoplasm and, …

Comparison Of Immune Correlates, Age Related Changes And Proteomic Profiling Of Healthy Individuals Receiving Influenza Vaccines, Gaurav Basu

Theses and Dissertations in Biomedical Sciences

The burden of influenza related infections is substantial, both in terms of illness, lives lost and economic impact on society. The degree of impact of influenza related infections is much higher in the elderly population where it is a leading cause of catastrophic disability; greatly affecting the quality of life of elderly persons above 65 years of age. Vaccination is the mainstay for control and prevention of influenza infections. There are two vaccine formulations that are licensed for use at present. The inactivated influenza vaccines (TIIV) which have been used for 60 years in all age groups and the new …

Role Of The Human Cytomegalovirus Ie2 Protein On Transcriptional Regulation Of Viral Promoters, Siabhon Michelle Harris

Theses and Dissertations in Biomedical Sciences

Human cytomegalovirus (HCMV) is a ubiquitous pathogen able to cause severe mortality and morbidity in immuno-compromised individuals. Successful infection by HCMV is dependent on expression of viral genes essential for replication. Immediate early (IE) gene products are the first subset of viral genes to be expressed during infection and function as key transcriptional regulators. IE2 is one the most predominantly expressed IE proteins and is essential for HCMV infection. IE2 transactivates several viral promoters, including those of the essential viral DNA polymerase (UL54) and UL112-113 gene regions. IE2 is also able to autoregulate is own expression and repress expression of …

Study Of The Dna Damage Complexes Within The Htlv-1 Tax Oncoprotein Interactome, Sidi Mehdi Belgnaoui

Theses and Dissertations in Biomedical Sciences

Human T-cell leukemia virus type 1 (HTLV-1) is a transforming retrovirus that can give rise to adult T-cell leukemia (ATL) and HTLV-1 associated myelopathy/tropical spastic paraparesis (HAM/TSP). Tax is a virally encoded oncoprotein that is involved in HTLV-1 mediated cellular transformation. It has been hypothesized that Tax induces genomic instability via repression of the cellular DNA damage repair response. Our laboratory has previously shown that the interaction between Tax and various proteins involved in the DNA-damage response pathway impairs the ability of these proteins to mount an efficient repair response. As part of these observations, we proposed that Tax induces …

Graminicolous Fungi Of Virginia: Fungi In Collections 2004-2007, Curtis W. Roane

Virginia Journal of Science

Fungus-grass associations recognized in Virginia from 2004 to 2007 are recorded. Many associations are new to the United States (U), eastern United States (EU) and Virginia (V); other associations extend the known distribution of those previously discovered. These reports contribute further to knowledge of the mycoflora of Virginia.