Digital Commons Network^™

Characterization Of Hiv Diversity, Phylodynamics And Drug Resistance In Washington, Dc., Marcos Pérez-Losada, Amanda D Castel, Brittany Lewis, Michael Kharfen, Charles P Cartwright, Bruce Huang, Taylor Maxwell, Alan E Greenberg, Keith A Crandall

Epidemiology Faculty Publications

No abstract provided.

Evolution In The Deep Sea: Scales And Mechanisms Of Population Divergence, Amanda E. Glazier

Graduate Doctoral Dissertations

The deep sea is the Earth’s largest ecosystem and harbors a unique and largely endemic fauna. Although most research has focused on the ecological mechanisms that allow coexistence, recent studies have begun to investigate how this remarkable fauna evolved.. My work quantifies geographic patterns of genetic variation and investigates potential mechanisms that shape evolution in the deep ocean.

Bathymetric genetic divergence is common in the deep sea with population structure typically decreasing with depth. The evolutionary mechanisms that underlie these patterns are poorly understood. Geographic patterns of genetic variation indicated that the protobranch bivalve Neilonella salicensis was composed of two …

Essays On Economics Of Gender And Labour Market., Kanika Mahajan Dr.

Doctoral Theses

The differences in labor market outcomes between males and females have been of interest to the economists for at least past half a century. Gender inequality in the labor market manifests itself in the form of wage and employment gaps between males and females. However, little is understood about why these inequalities emerge. There are taste based theories of discrimination, occupational exclusion and theories of statistical discrimination. In this thesis, we study gender disparities in the labor market of rural India. The main objective of this thesis is to further our understanding about the existing wage and employment disparities in …

Planning And Implementing A Successful Nsa-Nsf Gencyber Summer Cyber Academy, Bryson R. Payne, Tamirat Abegaz, Keith Antonia

Journal of Cybersecurity Education, Research and Practice

The GenCyber program is jointly sponsored by the National Security Agency (NSA) and the National Science Foundation (NSF) to help faculty and cybersecurity experts provide summer cybersecurity camp experiences for K-12 students and teachers. The main objective of the program is to attract, educate, and motivate a new generation of young men and women to help address the nationwide shortage of trained cybersecurity professionals. The curriculum is flexible and centers on ten cybersecurity first principles. Currently, GenCyber provides cyber camp options for three types of audiences: students, teachers, and a combination of both teachers and students. In 2016, over 120 …

Mapping Neighborhood Scale Survey Responses With Uncertainty Metrics, Charles R. Ehlschlaeger, Yizhao Gao, James D. Westervelt, Robert C. Lozar, Marina V. Drigo, Jeffrey A. Burkhalter, Carey L. Baxter, Matthew D. Hiett, Natalie R. Myers, Ellen R. Hartman

Journal of Spatial Information Science

This paper presents a methodology of mapping population-centric social, infrastructural, and environmental metrics at neighborhood scale. This methodology extends traditional survey analysis methods to create cartographic products useful in agent-based modeling and geographic information analysis. It utilizes and synthesizes survey microdata, sub-upazila attributes, land use information, and ground truth locations of attributes to create neighborhood scale multi-attribute maps. Monte Carlo methods are employed to combine any number of survey responses to stochastically weight survey cases and to simulate survey cases' locations in a study area. Through such Monte Carlo methods, known errors from each of the input sources can be …

Gender Bias In It Hiring Practices: An Ethical Analysis, Harmony L. Alford

Student Scholarship – Computer Science

With the current movement to increase the number of women in STEM-related careers, modified IT hiring practices may be considered debatably unethical. Studies cited in this work have asserted that female representation in STEM fields is integral not only to encouraging continued progression toward gender equality in the workplace but also to creating more inclusive products. In turn, some argue that when faced with reasonably comparable female and male candidates, a hiring manager should select the female candidate in order to increase the female representation in the company and provide a female perspective. However, it is simultaneously debatably unethical and …

What Affects Parents’ Choice Of Milk? An Application Of Bayesian Model Averaging, Yingzhe Cheng

Mathematics & Statistics ETDs

This study identifies the factors that influence parents’ choice of milk for their children, using data from a unique survey administered in 2013 in Hunan province, China. In this survey, we identified two brands of milk, which differ in their prices and safety claims by the producer. Data were collected on parents’ choice of milk between the two brands, demographics, attitude towards food safety and behaviors related to food. Stepwise model selection and Bayesian model averaging (BMA) are used to search for influential factors. The two approaches consistently select the same factors suggested by an economic theoretical model, including price …

A Green Oasis: What Makes Community Gardens Worth Saving? While Researchers Amass Evidence Of Benefits, Advocates Develop New Strategy To Prove Their Value., Joel Wolfram

Capstones

Green Valley Community Garden in Brownsville, Brooklyn, is one of about a dozen gardens on land owned by the New York City Department of Housing Preservation and Development that are being uprooted by plans to build affordable housing. The gardeners are fighting back to prevent the garden’s destruction, saying that the food-producing green space is a source of healthy eating in a community with high rates of health problems, like diabetes and obesity. Researchers are attempting to tease out the public health benefits of community gardens as one metric of their value, but the science is still catching up with …

The Paradox Of Social Media Security: A Study Of It Students’ Perceptions Versus Behavior On Using Facebook, Zahra Y. Alqubaiti

Master of Science in Information Technology Theses

Social media plays an essential role in the modern society, enabling people to be better connected to each other and creating new opportunities for businesses. At the same time, social networking sites have become major targets for cyber-security attacks due to their massive user base. Many studies investigated the security vulnerabilities and privacy issues of social networking sites and made recommendations on how to mitigate security risks. Users are an integral part of any security mix. In this thesis, we explore the relationship between users’ security perceptions and their actual behavior on social networking sites. Protection motivation theory (PMT), initially …

In-Class Versus At-Home Quizzes: Which Is Better? A Flipped Learning Study In A Two-Site Synchronously-Broadcast Organic Chemistry Course, Michael A. Christensen, Alyssia M. Lambert, Louis S. Nadelson, Kami M. Dupree, Trish A. Kingsford

Chemistry and Biochemistry Faculty Publications

We recently shared our design of a two-semester flipped organic chemistry course, in which we gave students in-class quizzes to incentivize attendance and watching the lecture videos in advance. With a second iteration, we planned to make the video-watching experience more engaging. We accordingly hypothesized that if students completed short at-home quizzes while watching the videos, then attentiveness, engagement, and learning would increase. We tested this with a later section of the course, dividing the material into 13 units. For units 1-6, we gave in-class quizzes; for 7-13, quizzes were at home. Although units 1-6 and 7-13 covered different material, …

The Evolution Of Zero-Tolerance Policies, Stephanie D. Stahl

CrissCross

Most Americans today have a largely negative image of zero-tolerance policies (ZTP) enacted to stop and prevent violence in the United States school system. According to the U.S. Department of Education Office of Educational Research and Improvement, zero-tolerance procedures are policies that mandate predetermined consequences or punishments for specific offenses (Walker). These policies specifically targeted actions considered violent and threatening, such as possession of a firearm or weapon. The concept of zero-tolerance policies was introduced into the education system during the 1980s as part of the failed War on Drugs as an attack on drug usage and violence in schools. …

Tracking The Elephant (Lexodonta Africana) Corridor And The Human-Wildlife Conflict In Selela Village, Nicole Chlebek, Laura Stalter

CrissCross

The beastly journey of long-distance migration for the African Elephant (Lexodonta Africana) is important for upholding their connections between diminishing protected areas, especially in northeastern Tanzania. However, human development is encroaching into these corridors, creating a human-elephant conflict, which can ruin livelihoods of villagers, depending on the extent of conflict. This study focused on exploring the hypothesized human-elephant conflict on the Selela corridor, specifically in Selela village, as well as GPS (Global Positioning System) mapping evidence of elephant travel along the projected Selela elephant corridor connecting Ngorongoro Conservation Area (NCA), to Selela Forest Reserve (SFR), and finally to …

Using Gis To Predict Cetacean Strandings Related To Harmful Algal Blooms, Jessica L. Boyd

HCNSO Student Capstones

Exposure to harmful algal bloom (HAB) toxins, such as Karenia brevis, has been linked to cetacean strandings and mortalities. Biological and environmental data from a bottlenose dolphin (Tursiops truncatus) Unusual Mortality Event (UME) in 2004 are compared to those from pilot whale (Globicephala macrorhynchus) mass stranding events in 2013-2014 in western Florida. Geographical Information Systems (GIS) maps have been created by overlaying stranding locations and select K. brevis presence data in order to identify common spatial and temporal trends. Preliminary results indicate that elevated K. brevis levels (>10,000 cells/L) in Sarasota Bay during January-February and November may …

Population Demographics And Sexual Reproduction Potential Of The Pillar Coral, Dendrogyra Cylindrus, On The Florida Reef Tract, Lystina Kabay

HCNSO Student Theses and Dissertations

The pillar coral, Dendrogyra cylindrus, has been commonly described as widely distributed, but rare throughout its geographical range in the Caribbean. Having recently been listed as Threatened under the US Endangered Species Act, an understanding of population status is needed to promote species conservation and population recovery. Previous to this study the status of the pillar coral population in the state waters of Florida, U.S.A, was relatively unknown primarily due to few colonies being recorded and no comprehensive summary of population abundance, distribution or health being completed. Along with various environmental and anthropogenic factors affecting the pillar coral population …

Economic Opportunity And Young Adult Mortality: Variations By Race/Ethnicity And Gender, Jocelyn Mineo

Honors Projects

This study examines the relationship between economic opportunity and adolescent and young adult mortality in the United States. In addition, this study explores other variables, such as social support and rurality, and their link to young adult mortality rates. First, we examined the link between economic opportunity and all-cause mortality rates for youth ages 15 to 34 in the United States. Given the increasing racial and ethnic diversity of America’s youth, we pay particular attention to race/ethnic differences. We also examine the differences in mortality by gender.

An Examination Of The Neural Unreliability Thesis Of Autism, John Butler, Sophie Molholm, Gizely Andrade, John J. Foxe

Articles

An emerging neuropathological theory of Autism, referred to here as “the neural unreliability thesis,” proposes greater variability in moment-to-moment cortical representation of environmental events, such that the system shows general instability in its impulse response function. Leading evidence for this thesis derives from functional neuroimaging, a methodology ill-suited for detailed assessment of sensory transmission dynamics occurring at the millisecond scale. Electrophysiological assessments of this thesis, however, are sparse and unconvincing. We conducted detailed examination of visual and somatosensory evoked activity using high-density electrical mapping in individuals with autism (N = 20) and precisely matched neurotypical controls (N = 20), recording …

Student Lifestyle Choices And Perceptions Of Stress Based On Majors, Nathan Robinson, Seth Andrews, Benjamin E. Yoder

Exercise Science Senior Research Projects

College students are often experience many stressors. This study was designed to look at perceived-stress and health habits with relation to academic department of undergraduate students at Cedarville University. The results of this study have implications for the Physical Activity and the Christian Life (PACL) class, offered on the Cedarville campus, in assessing its current curriculum and making potential future adjustments to the course. The objective of this study was to answer the question: “Do perceived stress levels within different academic departments affect health habits in Cedarville University undergraduate students?”

The study was conducted with a campus-wide, 27 question survey …

‘‘Can I Drop It This Time?’’ Gender And Collaborative Group Dynamics In An Engineering Design-Based Afterschool Program, Jessica Schnittka, Christine Schnittka

Journal of Pre-College Engineering Education Research (J-PEER)

The 21st century has brought an increasing demand for expertise in science, technology, engineering, and math (STEM). Although strides have been made towards increasing gender diversity in several of these disciplines, engineering remains primarily male dominated. In response, the U.S. educational system has attempted to make engineering curriculum more engaging, informative, and welcoming to girls. Specifically, project-based and design-based learning pedagogies promise to make engineering interesting and accessible for girls while enculturating them into the world of engineering and scientific inquiry. Outcomes for girls learning in these contexts have been mixed. The purpose of this study was to explore how …

Trophic Ecology Of Green Turtles (Chelonia Mydas) From Dry Tortugas National Park, Florida, David C. Roche

HCNSO Student Theses and Dissertations

Located 100 km west of Key West, Florida, Dry Tortugas National Park (DRTO) is a largely untouched subtropical marine ecosystem that serves as an important developmental habitat, nesting ground, and foraging area for several species of sea turtles, including green turtles. The Park supports a recovering population of green turtles comprised of resident juveniles, subadults, and adults of both sexes; nesting females include residents and migrating females that only return to nest. Stable isotope analysis has been applied widely to describe the trophic ecology of green turtles, from urbanized bays with significant anthropogenic input, to relatively pristine ecosystems with healthy …

Self-Reported Sleep Apnea And Dementia Risk: Findings From The Prevention Of Alzheimer's Disease With Vitamin E And Selenium Trial, Xiuhua Ding, Richard J. Kryscio, Joshua Turner, Gregory A. Jicha, Gregory E. Cooper, Allison M. Caban-Holt, Frederick A. Schmitt, Erin L. Abner

Sanders-Brown Center on Aging Faculty Publications

OBJECTIVES: To investigate the association between baseline sleep apnea and risk of incident dementia in the Prevention of Alzheimer's Disease with Vitamin E and Selenium (PREADViSE) study and to explore whether the association depends on apolipoprotein E (APOE) ɛ4 allele status.

DESIGN: Secondary analysis based on data collected during PREADViSE.

SETTING: Participants were assessed at 128 local clinical study sites during the clinical trial phase and later were followed by telephone from a centralized location.

PARTICIPANTS: Men enrolled in PREADViSE (without dementia or other active neurological conditions that affect cognition such as major psychiatric disorders, including depression; N = …

Exploration Of Student Biodiversity Knowledge And Decision-Making For A Wildlife Conservation Socioscientific Issue, Ashley R. Alred

School of Natural Resources: Dissertations, Theses, and Student Research

Global biodiversity, a foundation for ecosystem function, is diminishing at a rate unprecedented in the last 50 years. Biodiversity loss and ecosystem services deterioration is linked to increased food insecurity, reduced water quality and availability, decreased energy security, higher economic losses and human suffering (Millennium Ecosystem Assessment, 2005). Consequently, educators should invest in supporting students in their development of ecological understanding and formal decision-making skills so they are equipped with meaningful tools they can use as scientifically literate citizens. To contribute to that mission, this study seeks to explore student 1) comprehension and explanation of biodiversity concepts and 2) decision-making …

Privacy Protection And Aggregate Health Data: A Review Of Tabular Cell Suppression Methods (Not) Employed In Public Health Data Systems, Gregory J. Matthews, Ofer Harel, Robert H. Aseltine Jr.

Mathematics and Statistics: Faculty Publications and Other Works

Public health research often relies on individuals’ confidential medical data. Therefore, data collecting entities, such as states, seek to disseminate this medical data as widely as possible while still maintaining the privacy of the individual for legal and ethical reasons. One common way in which this medical data is released is through the use of Web-based Data Query Systems (WDQS). In this article, we examined WDQS listed in the National Association for Public Health Statistics and Information Systems (NAPHSIS) specifically reviewing them for how they prevent statistical disclosure in queries that produce a tabular response. One of the most common …

The Utility Of Mobile Phones For Health Among Women Living With Hiv In Urban Malawi, Linda Marie Dietrich

Theses and Dissertations

The use of mobile phones are becoming ubiquitous with growing interest by healthcare providers to utilize mobile phone technology for various health-related applications, called mHealth. This is especially true in low-income countries such as those in sub-Saharan Africa. When implementing mHealth applications, it is important to understand the dynamic social, cultural and environmental factors where mHealth will be implemented to ensure that interventions developed are effective. A qualitative study to explore the sociotechnical factors experienced by women participating in an HIV support group in urban Malawi was conducted to enhance our understanding of women’s experience with mobile phone use and …

Identifying With “The Native” In Anglo-American Environmental Writing: A Rhetorical Study, Alexis Piper

Theses and Dissertations

ABSTRACT

IDENTIFYING WITH “THE NATIVE”

IN ANGLO-AMERICAN ENVIRONMENTAL WRITING:

A RHETORICAL STUDY

by

Alexis F. Piper

The University of Wisconsin-Milwaukee, 2016

Under the Supervision of Professor Anne Wysocki

In an effort to contribute to rhetorical theories of “identification” this dissertation examines Anglo nature writing written for Anglo audiences in the United States over several centuries. In my conclusion, I suggest approaches current nature writers might use to offer audiences ways of engaging with Indigenous peoples and Native conceptions of environment that are more ethical, appropriate, and effective than approaches used in previous centuries. I maintain that such approaches could potentially …

Birth Mass Is The Key To Understanding The Negative Correlation Between Lifespan And Body Size In Dogs, Rong Fan, Gayla R. Olbricht, Xavior Baker, Chen Hou

Mathematics and Statistics Faculty Research & Creative Works

Larger dog breeds live shorter than the smaller ones, opposite of the mass-lifespan relationship observed across mammalian species. Here we use data from 90 dog breeds and a theoretical model based on the first principles of energy conservation and life history tradeoffs to explain the negative correlation between longevity and body size in dogs. We found that the birth/adult mass ratio of dogs scales negatively with adult size, which is different than the weak interspecific scaling in mammals. Using the model, we show that this ratio, as an index of energy required for growth, is the key to understanding why …

Exploring The Potential Impacts Of Climate Change On North America's Laurentian Great Lakes Tourism Sector, Natalie Chin

Open Access Dissertations

Climate change is one of the major challenges facing the global hospitality and tourism sector in the coming century and, given the important role that weather and climate play in all aspects of the tourism experience, tourism businesses owners need to start thinking about and enacting climate change adaptation strategies now. This work has utilized a combination of social science and physical science methods to (1) understand how the Great Lakes tourism sector could be impacted by climate change and (2) provide some insights into how researchers can help business owners prepare for these potential impacts. Overall, the results of …

Characterizing The Effects Of Repetitive Head Trauma In Female Soccer Athletes For Prevention Of Mild Traumatic Brain Injury, Diana Otero Svaldi

Open Access Dissertations

As participation in women’s soccer continues to grow and the longevity of female athletes’ careers continues to increase, prevention of mTBI in women’s soccer has become a major concern for female athletes as the long-term risks associated with a history of mTBI are well documented. Among women’s sports, soccer exhibits the highest concussion rates, on par with those of men’s football at the collegiate level. Head impact monitoring technology has revealed that “concussive hits” occurring directly before symptomatic injury are not predictive of mTBI, suggesting that the cumulative effect of repetitive head impacts experienced by collision sport athletes should be …

Lightcraft Previzion In Distance Education, Perry L. Cox

Open Access Theses

Visual Effects has continued to progress at an astonishing rate and green screen technology can be seen in all aspects of the video industry from Hollywood blockbusters down to training videos and distance education.

As video technology has increased, so has the quality and capability of distance education. Purdue University has set itself to be at the forefront of distance education. This study looked to evaluate Purdue's investment in the Lightcraft Technology's Previzion system and its impact on distance education at Purdue. There were 65 initial participants and this study compared the impact of two separate videos on their learning. …

A Mixed Methods Study: Evaluating The Relationship Of Project Manager Competencies And It Project Management Methodologies, Keith A. Mcdermott

Open Access Theses

Determining skillsets that are particularly important to the development of an effective project manager can be useful for a variety of applications. These applications range from the hiring of a new project manager for an organization to continued training for current employees. Past research has called upon current project managers to rate what skillsets they see as important to the cultivation of an optimal or effective project manager. Additional research has expanded this idea to determine how skillsets vary between project managers and functional managers (El-Sabaa, 2001). While this research is certainly important, skillset grouping can be further explored. This …

Laboratory Experiences In Mathematical Biology For Post-Secondary Mathematics Students, Matthew Lewis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In addition to the memorization, algorithmic skills and vocabulary which is the default focus in many mathematics classrooms, professional mathematicians are expected to creatively apply known techniques, construct new mathematical approaches and communicate with and about mathematics. We propose that students can learn these professional, higher level skills through Laboratory Experiences in Mathematical Biology (LEMBs) which put students in the role of mathematics researcher creating mathematics to describe and understand biological data. LEMBs are constructed so they require no specialized equipment and can easily be run in the context of a college math class. Students collect data and develop mathematical …