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Investigating The Impact Of Novel Iron Oxide Nanoparticles On Legionella Pneumophila Biofilms And Trophic Interactions, Brennen Jenkins May 2014

Investigating The Impact Of Novel Iron Oxide Nanoparticles On Legionella Pneumophila Biofilms And Trophic Interactions, Brennen Jenkins

All Theses

Microbial biofilms serve as the base of food webs and are important for nutrient cycling in aquatic ecosystems. Nanoparticles (NPs) that enter into these aquatic systems have the potential to settle and become trapped within biofilms. As NPs become further integrated into consumer products, understanding their fate and effects on aquatic ecosystems is of paramount importance. Previous studies from our lab show that gold NPs induce dispersal of Legionella pneumophila biofilms. NPs with platinum and iron oxide core chemistries also lead to similar dispersal events, however, silver core NPs do not seem to induce these events due to NP aggregation. …

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Design Of A High Temperature Subsurface Thermal Energy Storage System, Qi Zheng May 2014

Design Of A High Temperature Subsurface Thermal Energy Storage System, Qi Zheng

All Theses

Solar thermal energy is taking up increasing proportions of future power generation worldwide. Thermal energy storage technology is a key method for compensating for the inherent intermittency of solar resources and solving the time mismatch between solar energy supply and electricity demand. However, there is currently no cost-effective high-capacity compact storage technology available (Bakker et al., 2008). The goal of this work is to propose a high temperature subsurface thermal energy storage (HSTES) technology and demonstrate its potential energy storage capability by developing a solar-HSTES-electricity generation system. In this work, main elements of the proposed system and their related state-of-art …

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An Examination Of Students’ Technology Apprehension, Communication Competence, And Achievement Emotions In Community College Developmental Education Courses, Sara Crocker May 2014

An Examination Of Students’ Technology Apprehension, Communication Competence, And Achievement Emotions In Community College Developmental Education Courses, Sara Crocker

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Despite the infusion of information and communication technology into higher education, the effects of incorporating this technology in community college classrooms, particularly developmental courses, remains to be thoroughly studied. The demographic differences found in community colleges versus four-year institutions are stark and warrant their own focused investigation. The college experience is an emotion-laden one, especially from the position of an academically at-risk student. Experiencing high levels of technology apprehension could negatively affect a student’s achievement emotions. In exploring technology apprehension, self-perceived communication competence should be taken into account because of the communicative nature of the technology used in higher education. …

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A Comparison Of The Source, Media Format, And Sentiment In Generating Source Credibility, Information Credibility, Corporate Brand Reputation, Purchase Intention, And Social Media Engagement In A Corporate Social Responsibility Campaign Presented Via Social Media, Kristie Byrum May 2014

A Comparison Of The Source, Media Format, And Sentiment In Generating Source Credibility, Information Credibility, Corporate Brand Reputation, Purchase Intention, And Social Media Engagement In A Corporate Social Responsibility Campaign Presented Via Social Media, Kristie Byrum

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ABSTRACT This study addresses the impact of source, media format, and sentiment in the influencing source credibility, information credibility, corporate brand reputation, purchase intention, and social media engagement in a corporate social responsibility campaign presented in a social media environment. The study utilized a 2 x 3 x 2 ANOVA to analyze results from an online survey that exposed respondents to various source, format, and sentiment combinations. The source was designated as either a corporation or a consumer. The media format was a news release, an advertisement or a news article. The sentiment was classified as either 'with sentiment' or …

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An Examination Of The Role That Academic, Athletic, And Social Integration Play In The First-Year Freshman Student Athlete Experience, Adam Mcfarlane May 2014

An Examination Of The Role That Academic, Athletic, And Social Integration Play In The First-Year Freshman Student Athlete Experience, Adam Mcfarlane

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The focus on student athlete experiences continues to be a growing area of inquiry for researchers in higher education. While much of the focus for student athletes is on their academic performance in relation to their retention and persistence, there is an increasing concern for educational administrators to understand the experiences of student athletes in higher education settings. This study sought to gain a better understanding of the student athlete experience in higher education. To capture an understanding of the student athlete experience, the researcher asked: How do academic, athletic, and social experiences integrate to affect the freshman student athlete …

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Monte Carlo Modeling Based Patient Dose Optimization In Diagnostic Radiology, Wenjun He May 2014

Monte Carlo Modeling Based Patient Dose Optimization In Diagnostic Radiology, Wenjun He

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Radiation doses are caused by the energy deposited in unit mass of matter from ionizing radiation. In the US, radiation doses from medical imaging increased six-fold in the past generation. Among medical exposures to patients, computed tomography (CT) composes about half of the collective doses, and interventional fluoroscopy composes 14%. Radiation exposure to patients undergoing diagnostic radiological procedures causes increased lifetime carcinogenic risks, especially for pediatric patients who are more radiosensitive than adults. The correlation between procedural x-ray techniques and the radiation doses to patients, as well as the resultant image quality, is not well understood, and therefore the focus …

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Miniaturization Of Chemical Analysis Tools: Micro-Solid Phase Extraction Tips For Protein Extractions And Development Of A Miniaturized Glow Discharge Source For Elemental Analysis, Benjamin Manard May 2014

Miniaturization Of Chemical Analysis Tools: Micro-Solid Phase Extraction Tips For Protein Extractions And Development Of A Miniaturized Glow Discharge Source For Elemental Analysis, Benjamin Manard

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An increased interest has been placed on the miniaturization of chemical processes. Focus is placed on rapid chemical analysis, decreased operation cost, minimal generation of chemical waste, and reduced sample size. Presented here is an approached the goal of 'miniaturization' through two distinct areas of analytical chemistry: 1) employing capillary-channeled polymer (C-CP) fibers as a stationary phase in micro-SPE (solid phase extraction) tips for the extraction of proteins from buffered solutions (i.e. biofluids) with analysis by mass spectrometry (MS) and 2) the development of the liquid sampling-atmospheric pressure glow discharge (LS-APGD) as an excitation source for elemental analysis. Determination of …

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Effects Of Teacher Training On Preservice Teachers' Knowledge, Personal Beliefs, And Attitudes, Sloan Smith Huckabee May 2014

Effects Of Teacher Training On Preservice Teachers' Knowledge, Personal Beliefs, And Attitudes, Sloan Smith Huckabee

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This study examines the effects of the NAMI Parents and Teachers as Allies training on the Mental Health Literacy, Personal Beliefs, and Stigmatizing Attitudes of preservice teachers. A researcher developed survey was administered three times to the training group prior to, immediately following, and two weeks after the training. A nonequivalent control group was administered two surveys—a preliminary measure and a follow up measure—to provide comparison data for investigating the effects of the intervention on the group of preservice teachers receiving the intervention. Results of the study indicate the Parents and Teachers as Allies training is an inexpensive, relatively short …

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Reading Graphically: Examining The Effects Of Graphic Novels On The Reading Comprehension Of High School Students, Michael Cook May 2014

Reading Graphically: Examining The Effects Of Graphic Novels On The Reading Comprehension Of High School Students, Michael Cook

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There have been few empirical studies investigating the uses of graphic novels in education, fewer still in English Language Arts (ELA). As a result, there remain misconceptions about possible uses and potential benefits of graphic texts in ELA classrooms. The purpose of this study was to investigate the effects of graphic novels on the reading comprehension of high school students in English classrooms. The study specifically examined the potential benefits and effects of a graphic adaptation of the Edgar Allan Poe short story, 'The Cask of Amontillado.' This study explored the effects of the graphic adaptation in two ways: one, …

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Processes Utilized By High School Students Reading Scientific Text, Alicia Clinger May 2014

Processes Utilized By High School Students Reading Scientific Text, Alicia Clinger

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In response to an increased emphasis on disciplinary literacy in the secondary science classroom, an investigation of the literacy processes utilized by high school students while reading scientific text was undertaken. A think-aloud protocol was implemented to collect data on the processes students used when not prompted while reading a magazine article and a selection from a textbook. Following the think-aloud, participants provided an oral summary that was analyzed for content and quality to assess the effectiveness of the strategies. The data showed that familiarity with text structure and prior knowledge of the content affected the processes utilized. Differences between …

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A Memento Of Complexity: The Rhetorics Of Memory, Ambience, And Emergence, Glen Southergill May 2014

A Memento Of Complexity: The Rhetorics Of Memory, Ambience, And Emergence, Glen Southergill

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Drawing from complexity theory, this dissertation develops a schema of rhetorical memory that exhibits extended characteristics. Scholars traditionally conceptualize memory, the fourth canon in classical rhetoric, as place (loci) or image (phantasm). However, memory rhetoric resists the traditional loci-phantasm framework and instead emerges from enmeshments of interiority, collectivity, and technology. Emergence considers the dynamics of fundamental parts that generate complex systems and offers a methodological lens to theorizing memory. The resulting construct informs everyday life, which includes interfacing with pervasive computing or sensing familiarity. Further, congruently with a neurological turn that contradicts simplification, this dissertation resituates rhetorical memory as generative …

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Range Collapse, Genetic Differentiation, And Climate Change: An Ecological History Of The Diana Fritillary, Speyeria Diana And Projections For Its Future, Carrie Wells May 2014

Range Collapse, Genetic Differentiation, And Climate Change: An Ecological History Of The Diana Fritillary, Speyeria Diana And Projections For Its Future, Carrie Wells

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The geographic ranges of most plant and animal species are tied closely to climatic factors, including temperature, precipitation, and soil moisture. For this reason, recent changes in the global climate due to human activities are predicted to have profound effects on natural populations, communities and ecosystems over a relatively short period of time. Combined effects from global warming and other anthropogenic activities such as land-use changes, pollution, and habitat loss/fragmentation, are altering species' distributions faster than they can be documented. Recent climate change has also been shown to alter species' breeding behaviors and alter the synchrony and timing of species' …

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Novel Light Emissive Yttrium-Based Nanoparticles And Composites, Laura Hill May 2014

Novel Light Emissive Yttrium-Based Nanoparticles And Composites, Laura Hill

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Yttrium-based inorganic optical materials generally are of practical interest for three applications: solid state lighting/displays, lasers, and scintillators. Solid-state lighting is particularly desirable commercially for its efficiency and lifetime compared to traditional incandescent alternatives. This type of lighting technology is of increasing interest as incandescent light bulbs are being gradually phased-out due to government regulations on maximum wattage of these devices. Additionally, shortcomings in the current state of the art have driven the need for a more thermally stable material for use in this area. In this dissertation, we develop and characterize a novel composite material consisting of optically active …

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University Administrators' Attitudes And Perceptions Of State Authorization For Online Learning, Penelope Vassar May 2014

University Administrators' Attitudes And Perceptions Of State Authorization For Online Learning, Penelope Vassar

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The purpose of this study was to gain an understanding of the differences in attitudes and perceptions toward state authorization of online learning among higher education administrators situated at different levels of policy involvement. The population for this study was higher education administrators at 153 institutions in the United States that hold the Association to Advance Collegiate Schools of Business (AACSB) accreditation and offer degrees online. The study was conducted during the 2013-2014 academic year. A mixed-methods approach to data collection was selected for this study. The findings revealed the following: a) attitudes and perceptions toward state authorization of online …

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The Contagion Of Sharing: Rhetorics Of Community In An Age Of Digital Media, Jared Colton May 2014

The Contagion Of Sharing: Rhetorics Of Community In An Age Of Digital Media, Jared Colton

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This dissertation, entitled 'The Contagion of Sharing: Rhetorics of Community in an Age of Digital Media,' interrogates the relationship between rhetoric, ethics, and politics in community building, practice, and critique in an age of online communities and new media writing. I focus on how rhetoric and composition scholars overemphasize the role inclusion plays in communal phenomena and that not enough attention is paid to understanding how community practices and processes require both sharing and protection, identity and difference, and thus, inclusion and exclusion. I argue that, as teachers of rhetoric and writing, if we intend to help students write for, …

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Hybrid Spaces: Users' Perceptions Of Digitally Mediated Public Space, Melanie Duffey May 2014

Hybrid Spaces: Users' Perceptions Of Digitally Mediated Public Space, Melanie Duffey

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Public space has served as a central component to human settlement since the ancient Greeks, and a forum for unmediated discussion, communication, and debate (Hénaff & Strong, 2001; Mitchell 2003). During the industrialization of cities, public space continued to transform in form and typology, and has served society in various ways (Carr, Rivlin, Francis, & Stone, 1992). Public space is also a physical environment where interaction with digital environment occurs. Today, in the City of New York there are 503 privately owned public spaces (POPS) (Kayden, 2000); often these spaces provide varying levels of wireless access as public and/or private …

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Cardiovascular Tissue Engineered Constructs For Patients With Diabetes, James Chow May 2014

Cardiovascular Tissue Engineered Constructs For Patients With Diabetes, James Chow

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Clinical translation of cardiovascular tissue engineering (CVTE) is rapidly shifting from concept to application, granting a myriad of opportunities for the treatment of cardiovascular disorder (CVD). There remains, however, a critical hurdle to overcome: the application of tissue engineering to a comprised patient - more specifically, a patient with diabetes mellitus (DM). The alarming prevalence of DM is of great concern due to its duel threat as both a risk factor for CVD and a predictor of biomedical device failure. Elevated levels of inflammation and impaired wound healing are hallmarks of DM contributing to cardiomyopathy, atherosclerosis, and valve disease. The …

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The Context Of Successful Navigation Of Gendered Norms In Outdoor Adventure Recreation: The Case Of Professional Female Adventure Athletes, Katherine Evans May 2014

The Context Of Successful Navigation Of Gendered Norms In Outdoor Adventure Recreation: The Case Of Professional Female Adventure Athletes, Katherine Evans

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Females have long found it difficult to find entrance to and acceptance in the outdoors because of socially engrained gender expectations, a lack of female role models, and fear. Despite the hurdles, research indicates that females who participate in outdoor recreation are more empowered, and have higher levels of self-esteem, self-trust, self-worth, assertiveness, self-sufficiency, independence, confidence, and body image (McDermott, 2004; Pohl, Borrie, & Patterson, 2000). Therefore, it is important that females are not only encouraged to participate in outdoor recreation, but empowered to do so. Current research on females' leisure in the outdoors largely focuses on women who are …

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The Effects Of Indirubin-3’-(2,3 Dihydroxypropyl)-Oximether (E804) On Inflammation Profile In Macrophages, Amy Lauren Anderson May 2014

The Effects Of Indirubin-3’-(2,3 Dihydroxypropyl)-Oximether (E804) On Inflammation Profile In Macrophages, Amy Lauren Anderson

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Indirubin is a deep-red bis-indole isomer of indigo blue, both of which are biologically active ingredients in Danggui Longhui Wan, an ancient Chinese herbal tea mixture used to treat neoplasia and chronic inflammation, and to enhance detoxification of xenobiotics. Multiple indirubin derivatives have been synthesized and shown to inhibit cyclin-dependent kinases (CDKs) and glycogen-synthase kinase (GSK-3β) with varying degrees of potency. Several indirubins are also aryl hydrocarbon receptor (AhR) agonists, with AhR-associated activities covering a wide range of potencies, depending on structure-activity-relationships (SAR). In this study, the effects on indirubin-3’-(2,3 dihydroxypropyl)-oximether (E804), a novel indirubin derivative with potent effects on …

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Pretreatment Development Of Lignocellulosic Feedstocks For The Production Of Bioproducts, Arpan Jain May 2014

Pretreatment Development Of Lignocellulosic Feedstocks For The Production Of Bioproducts, Arpan Jain

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Three different lignocellulosic feedstocks – switchgrass, sweet sorghum bagasse and pine wood chips, were analyzed for the production of bioproducts (sugars and enzymes). High sugar content of these feedstocks could be utilized either in the production of enzymes, biofuel and paper/pulp. Utilization of lignocellulosic feedstock in any production processes require preprocessing to remove phenolic compounds (lignin). Lignin acts as a barrier and protects the structure of polysaccharides from oxidation. Removal of lignin (delignification) leads to maximum utilization of lignocellulosic polysaccharides, mainly glucan and xylan in bioproducts production. The effect of pretreatment on ground switchgrass were evaluated through enzyme production and …

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Evaluation And Development Of Nisin-Containing Packaging For Ready-To-Eat Meats, Utilizing Methods Feasible For Future Commercialization, Angela Morgan May 2014

Evaluation And Development Of Nisin-Containing Packaging For Ready-To-Eat Meats, Utilizing Methods Feasible For Future Commercialization, Angela Morgan

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Antimicrobial food packaging may extend shelf life, reduce spoilage, maintain food quality and eliminate foodborne pathogens in ready-to-eat (RTE) deli meat. Nisin is a polypeptide with natural antimicrobial activity against gram-positive microorganisms. This food additive is generally recognized as safe (GRAS) in the United States. In order to combat Listeria monocytogenes, continued good manufacturing practices, continued proper handling by food workers, and additional secondary safety measures such as antimicrobial packaging are necessary. However, current research for antimicrobial packaging is in preliminary stages and is primarily based on theoretical lab scale testing. Antimicrobial coatings containing nisin were developed and studied. Diffusion …

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Optically Active And Stimuli-Responsive Macromolecules: Photophysics, Morphology And Sensor Applications, Ashley A. Buelt May 2014

Optically Active And Stimuli-Responsive Macromolecules: Photophysics, Morphology And Sensor Applications, Ashley A. Buelt

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Conjugated polymers are of particular interest for many device applications, especially those involving optoelectronics. Not only is there a potential for π-conjugated organic materials to replace inorganic materials in applications such as solar cells and light emitting diodes, but there is also the possibility for these materials to serve as key components of cheaper, more environmentally-friendly, lighter and more flexible materials. For over thirty years, researchers have been striving to understand the morphology, electrochemical and photophysical properties of this new class of organic materials. The work presented herein advances the field through synthetic design and morphological studies. In addition, several …

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Freesources: A Treasure Chest Of Free-To-Use Online Tools And Goodies, Diana Finkle May 2014

Freesources: A Treasure Chest Of Free-To-Use Online Tools And Goodies, Diana Finkle

Presentations

One of the most amazing things about the Internet is its wealth of free, high-quality resources. Come learn about some free, online sources for video and infographic creation, productivity tools, and image and audio sources and software. This whirlwind tour will cover more than twenty resources, so you should be able to find at least one new tool for your professional (or personal) toolkit!

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Employee Picks Display, Maggie Mason Smith May 2014

Employee Picks Display, Maggie Mason Smith

Presentations

No abstract provided.

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2014 Committee Annual Reports/Updates May 2014

2014 Committee Annual Reports/Updates

NASIG Newsletter

No abstract provided.

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May 2014 Full Issue May 2014

May 2014 Full Issue

NASIG Newsletter

No abstract provided.

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Volumetric Cloud Rendering: An Animation Of Clouds, Zhaoxin Ye May 2014

Volumetric Cloud Rendering: An Animation Of Clouds, Zhaoxin Ye

All Theses

This paper demonstrates a production workflow for a volumetric-rendering-based short animation about clouds. The animation is based on the concept of a giant fish swimming in the sky from Zhuangzi's philosophical story. The algorithm and implementation for the modeling and rendering of clouds are also presented. A renderer was developed that uses the OpenVDB library for data storage, fast retrieving and grid manipulation. A user-friendly pipeline was also developed for cloud modeling and rendering, which used Python and XML for adjusting rendering parameters. The pipeline includes Maya to build the rough cloud model and Houdini to calculate the interior light …

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Effects Of Creosote-Contaminated Sediment Extracts On Mouse Macrophage Physiology And Function, Rayna Silva May 2014

Effects Of Creosote-Contaminated Sediment Extracts On Mouse Macrophage Physiology And Function, Rayna Silva

All Theses

The southern branch of the Elizabeth River, at Portsmouth Virginia is one of the most polluted systems in North America. This harbor estuary system is also home to the Atlantic Wood Superfund site, which is heavily contaminated with creosote from the Atlantic Wood (AW) preservative company that ceased production in the later 1990s. Creosote is a mixture of polyaromatic hydrocarbons (PAHs), metals, and numerous aliphatic hydrocarbons, and well known to be carcinogenic. The toxicity of sediments and pore waters from the AW site has been studied extensively using Fundulus heteroclitus, also known as the mummichog, or Atlantic killifish. Most adult …

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'Meaning Strides Through These Poems': Ted Berrigan's The Sonnets And The Poetics Of Sociability, Joshua Martin May 2014

'Meaning Strides Through These Poems': Ted Berrigan's The Sonnets And The Poetics Of Sociability, Joshua Martin

All Theses

In the field of modern/postmodern poetry studies, the Second Generation New York School of poets has been, and continues to be, an undervalued aesthetic movement. Following the now famous First Generation New York School - a literary and artistic coterie containing the likes of Ashbery, O'Hara, and Pollock - the poets of the Second Generation lived, worked, and often died in New York's Lower East Side and, in the process, emulated and altered the aesthetic of the First Generation. This thesis attempts to contextualize the achievements of the Second Generation New York School by focusing on the movement's de facto …

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Synthesis And Characterization Of Polymeric Micelle Delivery System As A Drug And, Justin Nice May 2014

Synthesis And Characterization Of Polymeric Micelle Delivery System As A Drug And, Justin Nice

All Theses

Traumatic brain injury (TBI) is a leading cause of death and disability worldwide. There is currently no effective therapeutic for the treatment of TBI. Primary injury, from the initial injury, causes contusions and hemorrhaging at the site of impact. Diffuse damage is caused throughout the brain from the impact; this includes axonal injury, hypoxic brain damage, brain swelling and vascular injury. Brain damage continues as the secondary injury; which is characterized by hypoxia, hypotension, amino acid excitotoxicity and ionic imbalance. All of these conditions cause additional cell death and damage. Inflammation, brought about by reduced cyclic AMP levels is also …

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