Digital Commons Network^™

An Examination Of Oral Argumentation Using Socioscientific Issues Among Secondary Students With Disabilities, Mindy A. Gumpert

Communication Disorders & Special Education Theses & Dissertations

The recent science education reforms mandate that all students must receive adequate opportunities to access the science curriculum in order to gain a better understanding of how science and the world works (National Research Council, 2012). According to these reforms, engagement in argumentation is one science practice essential to today’s K-12 science education (Sampson & Clark, 2011). Engagement in argumentation promotes critical thinking, problem solving and communication skills, and has the potential to promote growth of cognitive and metacognitive reasoning (Venville & Dawson, 2010). Additionally, engagement in argumentation using socioscientific issues provides students with authentic links to contemporary real-world social …

Wandering Woodpeckers: Foray Behavior In A Social Bird, Sahas Barve, Natasha D. G. Hagemeyer, Russell E. Winter, Samuel D. Chamberlain, Walter D. Koenig, David W. Winkler, Eric L. Walters

Biological Sciences Faculty Publications

In many cooperatively breeding taxa, nonbreeding subordinates, or helpers, use extra-territorial forays to discover dispersal opportunities. Such forays are considered energetically costly and foraying birds face aggression from conspecific members of the territories they visit. In contrast, breeders in cooperatively breeding taxa are expected to foray seldomly. We used novel tracking technologies to follow 62 acorn woodpeckers (Melanerpes formicivorus), a cooperatively breeding bird, to study extra-territorial foray behavior. Both helpers and breeders engaged in extra-territorial forays routinely and often several times per day. Helpers forayed earlier in the day and invested more time when foraying to high-quality territories. …

Dormant Pathogenic Cd4(+) T Cells Are Prevalent In The Peripheral Repertoire Of Healthy Mice, Anna Cebula, Michal Kuczma, Edyta Szurek, Maciej Pietrzak, Natasha Savage, Wessam R. Elhefnawy, Grzegorz Rempala, Piotr Kraj, Leszek Ignatowicz

Computer Science Faculty Publications

Thymic central tolerance eliminates most immature T cells with autoreactive T cell receptors (TCR) that recognize self MHC/peptide complexes. Regardless, an unknown number of autoreactive CD4+Foxp3⁻ T cells escape negative selection and in the periphery require continuous suppression by CD4+Foxp3⁺ regulatory cells (Tregs). Here, we compare immune repertoires of Treg-deficient and Treg-sufficient mice to find Tregs continuously constraining one-third of mature CD4⁺Foxp3⁻ cells from converting to pathogenic effectors in healthy mice. These dormant pathogenic clones frequently express TCRs activatable by ubiquitous autoantigens presented by class II MHCs on conventional dendritic cells, including selfpeptides that select …

Examine Predictors Of Bmi Classification And Perception Of Overweght Status Of Caregivers Of Preschool Children, Beth H. Chopp

Health Services Research Dissertations

Since the 1970’s the rate of childhood obesity in the United States has tripled and now one in five school-aged children is obese (Ogden et al., 2016). The childhood obesity epidemic will have medical, social, economic implications for future generations. Risk factors for childhood obesity include genetics, food intake, and physical activity, maternal health during pregnancy, parental weight, maternal employment and sociodemographic influences. This study examined the relationship between caregiver misperception of their preschoolers’ overweight/obese weight status and possible predictors that may assist in future interventions. The study evaluated NHANES data of 1245 caregivers with a child under age five …

Effect Of The Physical Micro-Environment On Cell Adhesion And Force Exertion, Mohamad Eftekharjoo

Mechanical & Aerospace Engineering Theses & Dissertations

Physical characteristics of the microenvironment, such as geometry and stiffness, influence cell adhesion and contractile forces. Here, we determined how these physical factors influenced cell force exertion and adhesion in two specific contexts that have broad relevance.

Fibroblasts are cells in connective tissues that interact with a fibrous extracellular matrix (ECM) that have a predominantly one-dimensional (1D) (fibrillar) geometry. However, it has been unclear as to how the 1D nature of the fibrillar ECM influences the forces exerted by fibroblasts. Here, we used fibroblast cells adherent on fibronectin lines on polyacrylamide (PAA) gels of stiffness 13 and 45 kPa to …

Tick Control Methods For Amblyomma Americanum In Virginia: Applications And Modeling, Alexis Lynn White

Biological Sciences Theses & Dissertations

Tick-borne diseases continue to increase in the United States, and yet no comprehensive method of tick control currently exists. The lone star tick, Amblyomma americanum, is an aggressive human-biting tick and vector of several pathogens which effect both humans and other animals. Standard control methods do not work as well for A. americanum as they do for the more commonly studied blacklegged tick, Ixodes scapularis. TickBot, a tick-killing robot, is a potential method to control A. americanum that lures ticks to its path with carbon dioxide and the ticks die from contact with a permethrin-treated cloth that is …

Illuminator, Volume 3, Issue 1, Batten College Of Engineering & Technology, Old Dominion University

College of Engineering & Technology Newsletter

September 2019 issue of Illuminator, a monthly publication of ODU's Batten College of Engineering and Technology.

College Of Health Sciences E-Newsletter, September 2019, Irvin B. Harrell (Editor)

Ellmer College of Health Sciences Newsletters

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

Biogeochemical Controls Of Surface Ocean Phosphate, Adam C. Martiny, Michael W. Lomas, Weiwei Fu, Philip W. Boyd, Yuh-Ling L. Chen, Gregory A. Cutter, Michael J. Ellwood, Ken Furuya, Fuminori Hasshihama, Jota Kanda, David M. Karl, Taketoshi Kodama, Qian P. Li, Jian Ma, Thierry Moutin, E. Malcolm S. Woodward, J. Keith Moore

OES Faculty Publications

Surface ocean phosphate is commonly below the standard analytical detection limits, leading to an incomplete picture of the global variation and biogeochemical role of phosphate. A global compilation of phosphate measured using high-sensitivity methods revealed several previously unrecognized low-phosphate areas and clear regional differences. Both observational climatologies and Earth system models (ESMs) systematically overestimated surface phosphate. Furthermore, ESMs misrepresented the relationships between phosphate, phytoplankton biomass, and primary productivity. Atmospheric iron input and nitrogen fixation are known important controls on surface phosphate, but model simulations showed that differences in the iron-to-macronutrient ratio in the vertical nutrient supply and surface lateral transport …

Measuring The Muck, Jim Morrison

How Flooding Impacts Water Quality

No abstract provided.

Career Pathways Program Annual Report, 2018-2019, Wie Yusuf

Career Pathways

Career Pathways launched in August 2017 as the university-wide initiative to provide graduate student professional development. It encompasses both the Preparing Future Faculty program and the Preparing Future Professionals Certificates. The Preparing Future Faculty Certificate was an existing program, started in 2007, while the Preparing Future Professionals Certificate was launched concurrently with Career Pathways. The Career Pathways program prepares graduate students for successful transition into thriving careers. Career Pathways is a gateway to resources, programs, events, and planning tools for ODU graduate students and post-doctoral fellows. Career Pathways events are also available to NSU graduate students.

Circulation, Vol. 24, No. 3, Center For Coastal Physical Oceanography, Eileen Hofmann, Brynn Pecher, Margaret Mulholland

CCPO Circulation

Summer 2019 issue of CCPO Circulation featuring article, "Combining Forces to Understand Harmful Algal Bloom Dynamics," by Eileen Hofmann, Brynn Pecher, and Margie Mulholland.

Supplemental Instruction, Calibration, And Self-Efficacy: A Path Model Analysis, Jennifer Leigh Grimm

Educational Leadership & Workforce Development Theses & Dissertations

Many students preparing for careers in the fields of science, technology, engineering, and mathematics (STEM) are unable to persist past entry-level courses to complete their college degrees. As a result, many higher education institutions have implemented intervention programs, like Supplemental Instruction (SI), to help students master course content and gain the self-regulated learning (SRL) behaviors necessary for success in challenging STEM courses. Numerous studies have demonstrated that SI attendance is correlated with improved course grades; however, few studies have examined the effect of SI attendance on students’ SRL behaviors, like self-efficacy and calibration, which may explain students’ academic achievement throughout …

The Impact Of Diet And Psychosocial Factors Post Bariatric Surgery, Eva Rani Panigrahi

Psychology Theses & Dissertations

Bariatric surgery is a medical procedure that has been found to be an effective option for weight loss. Despite the benefits of bariatric surgery, little is known about the psychosocial factors that may impact weight outcome. The present study attempted to examine patients’ level of perceived stress, depressed mood, and diet, and the association of these factors with percent weight loss in the first 6-months after surgery. Eighty patients completed pre- and 6-months post-operative depressed mood assessment (Patient Quality Health Questionnaire – 7 [PHQ-7]), a perceived stress measure (Cohen’s Perceived Stress Scale – 10 [PSS-10]), and dietary measures (Block Dietary …

Nutrient Controls Over Cyanobacterial Synthesis Of The Neurotoxin Β-N-Methylamino-L-Alanine (Bmaa) And Its Potential Accumulation In The Blue Crab (Callinectes Sapidus), Madeline M. Hummel

OES Theses and Dissertations

Cyanobacteria are known to produce a variety of toxins that negatively impact both aquatic and terrestrial organisms. One putative neurotoxic compound is the non-protein amino acid β-N-methylamino-L-alanine (BMAA), which has epidemiological linkages to the development of several human neurological diseases. Three cyanobacterial species thought to produce BMAA —Microcystis aeruginosa, Synechococcus bacillaris, and Nostoc sp. —were grown in nutrient replete cultures to examine its synthesis and cellular distribution over a growth cycle. Production of BMAA was also examined in nutrient (nitrogen and phosphorus) deplete cultures of Microcystis aeruginosa. In addition, natural assemblages of phytoplankton dominated by …

In Hot Water: Thermal Acclimation Is Insufficient To Save Corals In The Anthropocene, Harmony Alise Martell

Biological Sciences Theses & Dissertations

Scleractinian corals are animal partners in exquisite symbioses with a suite of algal, microbial, fungal and viral associates comprising miniature ecosystems collectively referred to as a holobiont. In recent decades, ocean warming has jeopardized the delicate balance of the very symbioses that have enabled coral survival. Thermal stress causes a reduction of algal symbionts, a phenomenon referred to as ‘coral bleaching’ that represents dysbiosis in the holobiont and often leads to mortality. Current thermal acclimation theory states variation and gradual increases in temperature can ameliorate thermal stress. Indeed, there is evidence some coral species have some capacity to acclimatize to …

The Expression Of Connexin-43 By Cd11c+ Dendritic Cells Is Required To Maintain Cd4+ Foxp3+ Regulatory T Cell Population In Peripheral Lymphoid Organs, Caroline Titus Miller

Biological Sciences Theses & Dissertations

Foxp3⁺ regulatory T cells (T_R) are an immunosuppressive subset of CD4⁺ T cells that maintain homeostasis of the immune system. They are sustained by the interaction between the Major Histocompatibility Complex (MHC) molecules present on antigen presenting dendritic cells and the T Cell Receptor (TCR) expressed on T_R cells that is specific for the MHC loaded with an antigenic peptide. Here, we show that in addition to MHC/TCR interaction, Connexin-43 (Cx43) expression by dendritic cells is required to maintain the TR cell population. CD11c⁺ dendritic cells represent a major subset of antigen presenting cells. …

Lipid Biomarkers Of Bering And Chukchi Sea Euphausiids And Their Application To Diet History, Rachel L. Pleuthner

OES Theses and Dissertations

In the eastern Bering Sea, Thysanoessa raschii are the most abundant krill species and a keystone trophic member that serve as both an important grazer and link to upper level consumers. In this system krill experience large annual variation in food resources, especially during ice advance and retreat; multiple lipid classes are used to temper the effects of those fluctuations, as well as to fuel reproduction and growth. Two shipboard feeding experiments that occurred during late spring and early summer of 2010, respectively, monitored the lipid retention in adult T. raschii and examined the fluctuation of specific lipid biomarkers under …

Adding Soul To The Message: Applying African American Jeremiad Rhetoric As Culturally Competent Health Communication Online, Wilbert Francisco Laveist

English Theses & Dissertations

This study examines whether online health communications targeting African Americans could be more effective by structuring the message in the format of African American jeremiad rhetoric, a culturally unique version of the American jeremiad literary form. Health disparities (also known as health inequality) persist among African Americans despite increased health knowledge, improved communication practices, and access to health facts online. The problem is systemic, and thus a predictable outcome that requires change in societal structures that produce and maintain inequality. Individual behavior changes to improve health is also necessary. Information alone does not change behavior. Altering environmental factors is also …

Endogenous Force Transmission Between Epithelial Cells And A Role For Α-Catenin, Sandeep Dumbali

Mechanical & Aerospace Engineering Theses & Dissertations

In epithelial tissues, epithelial cells adhere to each other as well as to the underlying extra-cellular matrix (ECM). E-cadherin-based intercellular junctions play an important role in tissue integrity. These junctions experience cell-generated mechanical forces via apparent adaptor proteins such as beta (β) catenin, alpha (α) catenin and vinculin. Abnormalities in these junctions may result in skin related diseases and cancers. Here, I devised methods to determine the endogenous intercellular force within cell pairs as well as in large epithelial islands. I further ascertained the factors that affect the level of inter-cellular tension.

Experiments with pairs of epithelial cells exogenously expressing …

Two Essays On The Consumer Acculturation Process – A Need For And Development Of A Consumer Acculturation Measure, Kristina Marie Harrison

Theses and Dissertations in Business Administration

The United States is becoming increasingly multi-cultural and there are various new immigrant consumer groups that businesses try to reach through ethnic-based segmentation and targeting. Often, businesses offer accommodation strategies to their ethnic consumer groups through language or other cultural accommodation tactics. There are inconsistencies in the literature for the efficacy of ethnic-based targeting and accommodation strategies: often these do not have the desired results and there is evidence that ethnic identification may be fading over time for many immigrant groups.

There is evidence that acculturation may be a better predictor of consumer behavior such as preferences for brand, services, …

The Impact Of State Equity Standards On Leaders' Espoused Beliefs About Social Justice, Amanda Hadgraft

Educational Leadership & Workforce Development Theses & Dissertations

School leaders are tasked with greater responsibilities than ever before. Today’s school leaders are expected to act as social justice leaders, ensuring all students have an equitable environment to learn in. State departments of education hold leaders accountable by comparing standardized test scores of students in majority and minority groups. The problem is these assessments measure the outcome of learning, but fail to measure the environments learning occurs in. The purpose of this study was to understand, within the context of the accountability climate, school leaders’ espoused beliefs about social justice, and the practices they employ to those ends. Using …

A Study To Determine How To Measure The Laser Safety Climate At Academic Institutions, John Settlemyer

OTS Master's Level Projects & Papers

Statement of Problem

The purpose of this study was to determine if the laser safety climate can be measured at academic institutions and what factors would provide valid measures of the laser safety climate at academic institutions. Specifically, the study attempted to answer the following questions:

Research Questions

RQ1. Can laser safety climate be measured at academic institutions using a climate survey instrument?

RQ2. What factors should be measured by a laser safety climate instrument?

RQ3. What measures would provide actionable data for prescriptive intervention by laser safety professionals at academic institutions? (p. 4)

Electrostatically Localized Proton Bioenergetics: Better Understanding Membrane Potential, James Weifu Lee

Chemistry & Biochemistry Faculty Publications

In Mitchell's chemiosmotic theory, membrane potential Δψ was given as the electric potential difference across the membrane. However, its physical origin for membrane potential Δψ was not well explained. Using the Lee proton electrostatic localization model with a newly formulated equation for protonic motive force (pmf) that takes electrostatically localized protons into account, membrane potential has now been better understood as the voltage difference contributed by the localized surface charge density ([H-⁺_L] + ⁿΣ _i=1 [M⁽ⁱ⁺⁾_L]) at the liquid-membrane interface as in an electrostatically localized protons/cations-membrane-anions capacitor. That is, the origin of membrane …

Host Genetics And Geography Influence Microbiome Composition In The Sponge Ircinia Campana, Sarah M. Griffiths, Rachael E. Antwis, Luca Lenzi, Anita Lucaci, Donald C. Behringer, Mark J. Butler, Richard F. Preziosi

Biological Sciences Faculty Publications

1. Marine sponges are host to large, diverse communities of microorganisms. These microbiomes are distinct among sponge species and from seawater bacterial communities, indicating a key role of host identity in shaping its resident microbial community. However, the factors governing intraspecific microbiome variability are underexplored, and may shed light on the evolutionary and ecological relationships between host and microbiome.

2. Here, we examined the influence of genetic variation and geographic location on the composition of the Ircinia campana microbiome.

3. We developed new microsatellite markers to genotype I. campana from two locations in the Florida Keys, USA, and characterised their …

Targeting The Pin Domain Of Type Ii Toxins Is A Novel Approach To Treat Infections Caused By Nontypeable Haemophilus Influenzae, Ashley Lynne Molinaro

Biomedical Sciences Theses & Dissertations

Toxin-antitoxin (TA) gene pairs have been identified in nearly all bacterial genomes sequenced to date and are thought to facilitate persistence and antibiotic tolerance. TA loci are classified into various types based upon the characteristics of their antitoxins, with those in type II expressing proteic antitoxins. Many toxins from type II modules are ribonucleases that maintain a PilT N-terminus (PIN) domain containing conserved amino acids considered essential for activity. The vapBC (virulence associated protein) TA system is the largest subfamily in this class and has been linked to pathogenesis of nontypeable Haemophilus influenzae (NTHi). This dissertation presents three studies investigating …

Assessing The Relationship Between Flood Risk Perceptions And Adaptive Behaviors Of Households, Dontá Council

School of Public Service Theses & Dissertations

The purpose of this dissertation research is to examine the multiple relationships that explain household adaptive behaviors to flooding, and if risk perceptions play a mediating role in these relationships. Given the shift in transferring risks from public flood risk governance structures to households, there is a renewed interest in promoting private adaptive behavior amongst households that are vulnerable to flood impacts. Currently, the literature purports that flood risk perceptions rarely account for the variance explained in statistical models that examine household adaptive behaviors. This study analyzed an integrated conceptual framework that explored the mediating role of risk perceptions. The …

Using Feature Extraction From Deep Convolutional Neural Networks For Pathological Image Analysis And Its Visual Interpretability, Wei-Wen Hsu

Electrical & Computer Engineering Theses & Dissertations

This dissertation presents a computer-aided diagnosis (CAD) system using deep learning approaches for lesion detection and classification on whole-slide images (WSIs) with breast cancer. The deep features being distinguishing in classification from the convolutional neural networks (CNN) are demonstrated in this study to provide comprehensive interpretability for the proposed CAD system using the domain knowledge in pathology. In the experiment, a total of 186 slides of WSIs were collected and classified into three categories: Non-Carcinoma, Ductal Carcinoma in Situ (DCIS), and Invasive Ductal Carcinoma (IDC). Instead of conducting pixel-wise classification (segmentation) into three classes directly, a hierarchical framework with the …

Computational Analysis And Design Optimization Of Convective Pcr Devices, Jung Il Shu

Mechanical & Aerospace Engineering Theses & Dissertations

Polymerase Chain Reaction (PCR) is a relatively novel technique to amplify a few copies of DNA to a detectable level. PCR has already become common in biomedical research, criminal forensics, molecular archaeology, and so on. Many have attempted to develop PCR devices in numerous types for the purpose of the lab-on-chip (LOC) or point-of-care (POC). To use PCR devices for POC lab testing, the price must be lower, and the performance should be comparable to the lab devices. For current practices with the existing methods, the price is pushed up higher partially due to too much dependence on numerous developmental …

Intersectional Identities And Microaggressions: The Experience Of Transgender Females, Cory Daniel Gerwe

Counseling & Human Services Theses & Dissertations

Historically, attention given to privileged LGBT minorities such as white LGBT individuals, renders those who experience multiple minority identities as unacknowledged. There is a scarcity of research exploring the intersectional experiences of transgender individuals and how these experiences impact their mental health and well-being. For that reason, the intent of this study was to learn more about transgender females who hold additional minority statuses, their transition experiences, their circumstances, and the nature of their social environment. Specifically, I investigated trans female experiences of transitioning with a specific focus on the intersection of gender identity, race, socioeconomic status (SES), and age. …