Medicine and Health Sciences Commons^™

Plasma Medicine: A Brief Introduction, Mounir Laroussi

Electrical & Computer Engineering Faculty Publications

This mini review is to introduce the readers of Plasma to the field of plasma medicine. This is a multidisciplinary field of research at the intersection of physics, engineering, biology and medicine. Plasma medicine is only about two decades old, but the research community active in this emerging field has grown tremendously in the last few years. Today, research is being conducted on a number of applications including wound healing and cancer treatment. Although a lot of knowledge has been created and our understanding of the fundamental mechanisms that play important roles in the interaction between low temperature plasma and …

An Extensible Mathematical Model Of Glucose Metabolism. Part I: The Basic Glucose-Insulin-Glucagon Model, Basal Conditions And Basic Dynamics, Caleb L. Adams, D. Glenn Lasseigne

Mathematics & Statistics Faculty Publications

A basic model highlighting the counter-regulatory roles of insulin and glucagon is proposed to start a series of models designed to explore continuous rein control and major aspects of glucose metabolism. The three-by-three dynamical system uses black boxes to model unit processes such as the dependencies of insulin secretion rate and the glucagon secretion rate on blood glucose concentration. The dependency of basal conditions on insulin resistance and any defects in insulin or glucagon secretion are shown. Since over-production of hepatic glucose exists early in the history of diabetes, it is important that mathematical models should account for this effect …

Development And Validation Of The College Mental Health Perceived Competency Scale, Michael T. Kalkbrenner, Christopher A. Sink

Counseling & Human Services Faculty Publications

College counselors provide training to their campus constituents on various mental health issues, including the identification of warning signs and the referral of students to appropriate resources. Though extensive information on these topics is available in the counseling literature, college counselors lack a psychometrically sound screening instrument to support some of these educational efforts. To meet this need, the present researchers developed and validated the College Mental Health Perceived Competency Scale (CMHPCS). Based largely on self-determination theory, the measure appraises college student and faculty members’ perceived competence for supporting student mental health. Reliability and construct validity of the CMHPCS are …

A Systematic Review On The Validity Of Teledentistry, Jafar H. Alabdullah, Susan J. Daniel

Dental Hygiene Faculty Publications

Objectives: The aim of this systematic review was to evaluate the validity of using teledentistry in oral care examination and diagnosis.

Methods: In June 2016, a systematic search of the literature was conducted without time restrictions in three electronic databases (Ebscohost, Pubmed, and Scopus). Two reviewers screened the retrieved articles first by title and then by abstract to determine relevant articles for full text review. Studies included were as follows: (1) related to teledentistry, (2) available in full text and English, (3) compared teledentistry application to a gold standard, and (4) provided clear statistical tests for validity. The methodological …

Gain-Of-Function Experiments With Bacteriophage Lambda Uncover Residues Under Diversifying Selection In Nature, Rohan Maddamsetti, Daniel T. Johnson, Stephanie J. Spielman, Katherine L. Petrie, Debora S. Marks, Justin R. Meyer

Biological Sciences Faculty Publications

Viral gain-of-function mutations frequently evolve during laboratory experiments. Whether the specific mutations that evolve in the lab also evolve in nature and whether they have the same impact on evolution in the real world is unknown. We studied a model virus, bacteriophage λ, that repeatedly evolves to exploit a new host receptor under typical laboratory conditions. Here, we demonstrate that two residues of λ’s J protein are required for the new function. In natural λ variants, these amino acid sites are highly diverse and evolve at high rates. Insertions and deletions at these locations are associated with phylogenetic patterns indicative …

Better Living Through Chemistry: Addressing Emerging Antibiotic Resistance, Nathan P. Coussens, Ashley L. Molinaro, Kayla J. Culbertson, Tyler Peryea, Gergely Zahoránszky-Köhalmi, Matthew D. Hall, Dayle A. Daines

Biological Sciences Faculty Publications

The increasing emergence of multidrug-resistant bacteria is recognized as a major threat to human health worldwide. While the use of small molecule antibiotics has enabled many modern medical advances, it has also facilitated the development of resistant organisms. This minireview provides an overview of current small molecule drugs approved by the US Food and Drug Administration (FDA) for use in humans, the unintended consequences of antibiotic use, and the mechanisms that underlie the development of drug resistance. Promising new approaches and strategies to counter antibiotic-resistant bacteria with small molecules are highlighted. However, continued public investment in this area is critical …

Lack Of Delayed-Type Hypersensitivity In Striped Bass (Morone Saxatilis), Jessica Shannon Miller

Biological Sciences Theses & Dissertations

Mycobacteriosis is a fatal disease in fishes caused by acid-fast bacteria in the genus Mycobacterium. This disease impacts aquaculture, aquariums, and wild fishes. Unfortunately, there are currently no non-lethal diagnostic tests for mycobacterial infection in fishes. Type IV delayed type hypersensitivity (DTH) responses in vivo and in vitro are currently used for the non-lethal detection of mycobacterial infections in humans and in animals; however, there is little information available on DTH responses in fishes. In this work, we examine in vivo DTH response in Striped Bass (Morone saxatilis), an important U.S. Eastern seaboard fish species, experimentally …

Structure Of The Picornavirus Replication Platform: A Potential Drug Target For Inhibiting Virus Replication, Meghan Suzanne Warden

Chemistry & Biochemistry Theses & Dissertations

Picornaviruses are small, positive-stranded RNA viruses, divided into twelve different genera. Members of the Picornaviridae family cause a wide range of human and animal diseases including the common cold, poliomyelitis, foot and mouth disease, and dilated cardiomyopathy. The picornavirus genome is replicated via a highly conserved mechanism involving a presumed cloverleaf structure located at the 5’ noncoding region of the virus genome. The 5’ cloverleaf consists of three stem loops (B, C, and D) and one stem (A), which interact with a variety of virus and host cell proteins during replication. In this dissertation, human rhinovirus serotype 14 (HRV-14) SLB …

Effects Of Knee Sleeves On Knee Mechanics During Squats At Variable Depths, Alexandria A. Trypuc

Human Movement Studies & Special Education Theses & Dissertations

The squat is a functional, compound and multi-joint exercise that targets several muscles of the lower body and is widely used in both athletics and many exercise programs. This exercise has been the subject of many studies, comparing different squat variations and examining how external gear, such as squat suits and knee wraps impact the exercise. The aim of this study was to assess the effects of wearing neoprene knee sleeves on lower extremity kinematics, kinetics, and muscle activations during weighted back squats. Fifteen resistance trained men and women, aged 28±5 years, from the local fitness community and university campus …

Radial And Longitudinal Motion Of The Arterial Wall: Their Relation To Pulsatile Pressure And Flow In The Artery, Dan Wang, Linda Vahala, Zhili Hao

Mechanical & Aerospace Engineering Faculty Publications

The aim of this paper is to analyze the radial and longitudinal motion of the arterial wall in the context of pulsatile pressure and flow, and to understand their physiological implications for the cardiovascular system. A reexamination of the well-established one-dimensional governing equations for axial blood flow in the artery and the constitutive equation for the radial dilation of the arterial wall shows that two waves—a pulsatile pressure wave in the artery and a radial displacement wave in the arterial wall—propagate simultaneously along the arterial tree with the same propagation velocity, explaining why this velocity combines the physical properties and …

Temporal Trends In Human Vulnerability To Excessive Heat, Scott C. Sheridan, Michael J. Allen

Political Science & Geography Faculty Publications

Over recent decades, studies have examined various morbidity and mortality outcomes associated with heat exposure. This review explores the collective knowledge of the temporal trends of heat on human health, with regard to the hypothesis that humans are less vulnerable to heat events presently than in the past. Using Web of Science and Scopus, the authors identified all peer-reviewed articles that contained keywords on human impact (e.g. mortality, morbidity) and meteorological component (e.g. heat, heatwave). After sorting, a total of 71 articles, both case studies and epidemiological studies, contained explicit assessments of temporal trends in human vulnerability, and thus were …

Independent And Interactive Associations Of Negative Affect, Restraint, And Impulsivity In Relation To Binge Eating Among Women, Tyler B. Mason, Kathryn E. Smith, Jason M. Lavender, Robin J. Lewis

Psychology Faculty Publications

There is growing recognition that impulsivity may serve as an underlying risk factor for binge eating. In addition, the association of impulsivity with binge eating may be moderated by other affective and cognitive risk factors. This study examined independent and interactive associations of negative affect, dietary restraint, and facets of impulsivity with binge eating. A diverse sample of 566 undergraduate women completed online questionnaires of study variables. Results revealed a three-way interaction of negative affect, dietary restraint, and attentional impulsivity in relation to binge eating. Women who were high on each of these three variables reported the greatest levels of …

Preconceptional Health Behavior Change In Women With Overweight And Obesity: Prototype For Smart Strong Healthy Women Intervention, Frank T. Materia, Joshua M. Smyth, Kristin E. Heron, Marianne Hillemeier, Mark E. Feinberg, Patricia Fonzi, Danielle Symons

Psychology Faculty Publications

Background: The prevalence of maternal perinatal obesity is rising, and in turn, increases health risks and morbidity for both mother and child. Past evidence suggests the preconceptional Strong Healthy Women (SHW) intervention can reduce multiple biobehavioral risk factors for adverse perinatal health. The SHW intervention, however, was time- and resource-intensive to deliver. Mobile health (mHealth) technologies provide an opportunity to expand intervention reach while reducing implementation cost and burden. Previous research suggests that preconceptional women are broadly supportive of using smartphones for behavior change, yet few studies have elicited their specific preferences for a targeted mHealth intervention. The objective of …

Sexual Coercion, Drinking To Cope Motives, And Alcohol-Related Consequences Among Self-Identified Bisexual Women, Michelle L. Kelly, Sarah J. Ehlke, Robin J. Lewis, Abby L. Braitman, Wendy Bostwick, Kristin E. Heron, Cathy Lau-Barraco

Psychology Faculty Publications

Background: Given higher sexual victimization and greater alcohol use among bisexual women, a critical public health challenge is to understand within-group variation that may heighten or explain these associations in bisexual women. Objectives: The present study tested a moderated-mediation model in which sexual coercion was hypothesized to be associated with alcohol-related consequences via drinking to cope motives in self-identified bisexual women who reported at least occasional binge drinking. Negative affect was hypothesized to moderate the sexual coercion-drinking to cope motives association. Methods: Participants were a community sample of 107 self-identified bisexual women (age M = 20.97, SD = 2.11) who …

Measuring Sexual Minority Stressors In Lesbians Women's Daily Lives: Initial Scale Development, Kristin Heron, Abby L. Braitman, Robin J. Lewis, Alexander T. Shappie, Phoebe T. Hitson

Psychology Faculty Publications

Lesbian women face unique sexual minority stressors (SMS) because of their stigmatized and marginalized status in society. Existing studies of SMS are primarily cross-sectional and use global measures of SMS. The goal of the present study was to develop a brief daily measure of SMS for use in daily diary or ecological momentary assessment studies. Existing retrospective measures of SMS were reviewed, resulting in an initial pool of 29 items. Thirty-eight lesbian women (Mage = 24.3 years, range: 19–30 years) completed a daily web-based survey including the SMS items for 12 days. Two response scales were tested; participants were randomized …

Cultural Stressors, Identity Development, And Substance Use Attitudes Among Hispanic Immigrant Adolescents, Timothy J. Grigsby, Myriam Forster, Alan Meca, Byron L. Zamboanga, Seth J. Schwartz, Jennifer B. Unger

Psychology Faculty Publications

The goal of this investigation was to determine whether various cultural stressors (bicultural stress, perceived discrimination, and perceived negative context of reception [PNCR]) predict positive and negative substance use attitudes, directly and indirectly through personal identity, in a sample of immigrant Hispanic adolescents. Data on cultural stressors, substance use attitudes, and covariates were collected from 302 Hispanic immigrant adolescents (152 from Miami [61% Cuban] and 150 from Los Angeles [70% Mexican]) at 3 time points. PNCR was associated with identity confusion (𝛽=.175, p=.033). Identity confusion significantly predicted higher positive attitudes toward alcohol and other drug (AOD; 𝛽 =.216, p<.001) and cigarette use (𝛽=.191, p=.015) and mediated the relationship between PNCR with unfavorable AOD attitudes (𝛽 =-.019, 95% confidence interval [CI] [-0.052,-0.001]) and favorable AOD attitudes (𝛽=0.038, 95% CI [0.003, 0.086]). Perceptions of a negative context of reception may hinder successful personal identity formation and impact health outcomes for immigrant youth.

Workplace Bullying: A Survey Of Virginia Dental Hygienists, Gayle B. Mccombs, S. Lynn Tolle, Tara L. Newcomb, Ann M. Bruhn, Amber W. Hunt, Lanah K. Stafford

Dental Hygiene Faculty Publications

Purpose: Workplace bullying in health care has been identified as a problem that negatively affects career satisfaction, career longevity and patient outcomes. The purpose of this pilot study was to determine the prevalence of workplace bullying in a convenience sample of dental hygienists in the state of Virginia.

Methods: Two hundred and forty Virginia dental hygienists attending a continuing education seminar were invited to participate. Using the Negative Acts Questionnaire-Revised (NAQ-R), respondents were asked to indicate how often they had experienced 22 negative acts or behaviors according to rate of occurrence (never, now and then or monthly, weekly or …

Towards Understanding The Role Of Small Mammals In The Transmission Of Lyme Disease In Virginia, Usa, Robert K. Rose, Laura Bitzer, Wayne Hynes, Holly D. Gaff, Robyn Nadolny, Jory Brinkerhoff

Biological Sciences Faculty Publications

Larvae and nymphs of many species of ticks select small mammals, reptiles, and birds as hosts. Since 2011, we have examined more than 1,000 small mammals of 10 species and collected a small tissue sample as well as all visible ticks; rates of infestation range from 18% in harvest mice to 53% in meadow voles. Identification of immature ticks is challenging and requires molecular or genetic methods beyond classification as being from the genus Ixodes or another genus. Ixodes ticks include Ixodes scapularis, the species that transmits the Lyme disease-causing bacterium Borrelia burgdorferi to humans. Of the approximately 2,300 ticks …

How To Prepare Interprofessional Teams In Two Weeks: An Innovative Education Program Nested In Telehealth, Tina S. Haney, Karen Kott, Carolyn M. Rutledge, Bruce Britton, Christianne N. Fowler, Rebecca D. Poston

Ellmer School of Nursing Faculty Publications

PROBLEM:

Preparing health professional students for interprofessional collaborative practice, especially at a distance where provider shortages prevail remains difficult.

APPROACH:

A two-week interprofessional education (IPE) immersion experience preparing students from 11 disciplines and four universities was implemented. Week-one, using online technology, students develop/present an interprofessional careplan for a complex patient. Students then meet face-to-face to conduct group interviews with two standardized patient dyads. Week-two, students develop a website for use of the patient dyads. Websites are presented to faculty and fellow students via an online virtual meeting space.

OUTCOMES:

To date, 594 students have participated demonstrating capacity to: 1.effectively engage …

The Practical Utility And Suitability Of Email Interviews In Qualitative Research, Janice E. Hawkins

Ellmer School of Nursing Faculty Publications

Interviews with key informants are the most common means of data collection in qualitative descriptive research. Researchers have historically preferred face-to-face interviews but advances in technology have resulted in more options, including email exchanges, to conduct interviews. This article examines the practical utility and suitability of the email interview in qualitative research. The author will share personal experiences from a recent qualitative study involving email interviews of nurse educators. The purpose of the study was to describe the experiences of nurse educators in developing and implementing concurrent enrollment ADN-BSN programs. Interviews of nurse educators describing their experiences of developing and …

Non-Canonicaly Recruited Tcrαβcd8Αα Iels Recognize Microbial Antigens, Lukasz Wojciech, Edyta Szurek, Michal Kuczma, Anna Cebula, Wessam R. Elhefnawy, Maciej Pietrzak, Grzegorz Rempala, Leszek Ignatowicz

Computer Science Faculty Publications

In the gut, various subsets of intraepithelial T cells (IELs) respond to self or non-self-antigens derived from the body, diet, commensal and pathogenic microbiota. Dominant subset of IELs in the small intestine are TCRαβCD8αα⁺ cells, which are derived from immature thymocytes that express self-reactive TCRs. Although most of TCRαβCD8αα⁺ IELs are thymus-derived, their repertoire adapts to microbial flora. Here, using high throughput TCR sequencing we examined how clonal diversity of TCRαβCD8αα⁺ IELs changes upon exposure to commensal-derived antigens. We found that fraction of CD8αα⁺ IELs and CD4⁺ T cells express identical …

Predictors Of Medical Students’ Attitudes Towards Abortion And Their Changes Overtime, Rebecca Elizabeth Morales

Sociology & Criminal Justice Theses & Dissertations

As new legislation is regularly being introduced to minimize Roe v. Wade’s protection of women’s right to choose in a medical setting, it is imperative to study what predictors may have an impact on abortion attitudes within the demographic of medical students, as well as how these predictors impact one’s willingness to provide the service in the future. The current study then, uses data collected in 2000 and 2015 from a medical school located in Virginia, and in collaboration with a research university in the state to examine what factors are associated with a willingness to provide an abortion, as …

Characterization Of Language Cortex Activity During Speech Production And Perception, Hassan Baker

Electrical & Computer Engineering Theses & Dissertations

Millions of people around the world suffer from severe neuromuscular disorders such as spinal cord injury, cerebral palsy, amyotrophic lateral sclerosis (ALS), and others. Many of these individuals cannot perform daily tasks without assistance and depend on caregivers, which adversely impacts their quality of life. A Brain-Computer Interface (BCI) is technology that aims to give these people the ability to interact with their environment and communicate with the outside world. Many recent studies have attempted to decode spoken and imagined speech directly from brain signals toward the development of a natural-speech BCI. However, the current progress has not reached practical …

Frameworks For Integrating Technology Into Optometric Education, Helen Crompton

Teaching & Learning Faculty Publications

(Introduction) Technology has driven a major societal change permeating the very traditions, beliefs and rituals of our social and work milieu. Following the revolution caused by the introduction of the Gutenberg printing press, the current digital epoch has been recognised as the second major event in history that has extended and enhanced access to information and learning (Brynjolfsson 2014; Topol 2015). Research shows that digital technologies can be used to provide educational opportunities that were not possible before this digital era. These technologies allow learning in contextualised settings and provide a variety of learning opportunities for those studying optometry (Yi …

Reducing The Rate Of Cesarean Delivery On Maternal Request Through Institutional And Policy Interventions In Wenzhou, China, Yushan Yu, Xiangyang Zhang, Caixia Sun, Huijie Zhou, Qi Zhang, Chun Chen

Community & Environmental Health Faculty Publications

The objective of this study was to evaluate the effect of institutional and policy interventions on reducing the rate of cesarean delivery on maternal request (CDMR) in Wenzhou, China. Institutional interventions included health education, painless delivery introduction, and doula care. Additionally, a series of health policies were developed by the Chinese central and local governments to control cesarean section rates, mostly through controlling CDMR rates. We conducted a pre-/post-intervention study using 131,312 deliveries between 2006 and 2014 in three tertiary-level public hospitals in Wenzhou, China. Chi-square tests and predictive models were used to examine changes in the CDMR rate before …

Demystifying Research: Accessing & Understanding Evidence For Clinical Practice, Kimberly A. Murphy, Meredith Poore Harold, Mary Huston

Communication Disorders & Special Education Faculty Publications

The demands on clinicians for evidence-based practice (EBP) are great. However, many speech-language pathologists have received little to no training in how to ‘do’ EBP. In this presentation, we aim to describe and provide practical suggestions for two of the steps in EBP—accessing, then reading and interpreting research to inform clinical decision-making. Our goal is to give clinicians the tools and confidence they need to grow into expert clinicians.

Learner Outcome 1: Describe the components of evidence-based practice (EBP)

Learner Outcome 2: Identify ways to access research

Learner Outcome 3: Identify steps in reading and evaluating the …

Motor Learning Guided Treatment For Acquired Apraxia Of Speech: Factors That Influence Treatment Outcomes, Rachel K. Johnson, Joanne P. Lasker, Julie A.G. Stierwalt, Megan K. Macpherson, Leonard L. Lapointe

Communication Disorders & Special Education Faculty Publications

Purpose: The purpose of this study was to examine factors that might influence the treatment effectiveness of motor learning guided (MLG) treatment approach for apraxia of speech (AOS). Specifically, this study examined the effects home practice and the stimuli selection on speech production.

Method: This is a case study across two treatment cycles involving a 52 year-old male five months post left CVA (due to a carotid artery dissection). Each treatment cycle used three conditions of practice to investigate the influence of practice frequency on treatment outcomes. The personal relevance of stimuli within and across treatment conditions differed in the …

Computational Modeling For Abnormal Brain Tissue Segmentation, Brain Tumor Tracking, And Grading, Syed Mohammad Shamin Reza

Electrical & Computer Engineering Theses & Dissertations

This dissertation proposes novel texture feature-based computational models for quantitative analysis of abnormal tissues in two neurological disorders: brain tumor and stroke. Brain tumors are the cells with uncontrolled growth in the brain tissues and one of the major causes of death due to cancer. On the other hand, brain strokes occur due to the sudden interruption of the blood supply which damages the normal brain tissues and frequently causes death or persistent disability. Clinical management of these brain tumors and stroke lesions critically depends on robust quantitative analysis using different imaging modalities including Magnetic Resonance (MR) and Digital Pathology …

The Relationship Between Obesity And Periodontal Disease, Jean Conover

Dental Hygiene Master's Papers and Projects

Obesity has been targeted as the sixth most significant risk factor worldwide that is known to contribute to both oral and other associated systemic diseases.² According to the Centers for Disease Control and Prevention (CDC), the prevalence of obesity among adults in the U.S. is 40% and 18.5% in youth with prevalence higher among middle aged adults (42.8%) than younger adults (35.7%).³ As of 2016, nearly two billion people worldwide were either overweight or obese.¹ Research indicates accumulated excessive fat from being overweight or obese contributes to serious health impairments.⁴ World-wide obesity is associated with increased …

A Social-Ecological Framework Of Theory, Assessment, And Prevention Of Suicide, Robert J. Cramer, Nester D, Kapusta

Community & Environmental Health Faculty Publications

The juxtaposition of increasing suicide rates with continued calls for suicide prevention efforts begs for new approaches. Grounded in the Centers for Disease Control and Prevention (CDC) framework for tackling health issues, this personal views work integrates relevant suicide risk/protective factor, assessment, and intervention/prevention literatures. Based on these components of suicide risk, we articulate a Social-Ecological Suicide Prevention Model (SESPM) which provides an integration of general and population-specific risk and protective factors. We also use this multi-level perspective to provide a structured approach to understanding current theories and intervention/prevention efforts concerning suicide. Following similar multi-level prevention efforts in interpersonal violence …