Digital Commons Network^™

Investigation Of Spontaneously Patterned Nanoporous Organosilicate Thin Film Channels For Liquid Chromatography Applications., Ashwin Sanjay Bhaskaran

Graduate Research Theses & Dissertations

Microscale devices are attractive options for the advancement of biomedical engineering and life science. They have huge potential in the pharmaceutical and biomedical fields provided the critical factors such as device size, product purity and efficiency are not a hindrance. In most cases, traditional microelectronics fabrication processes are quite costly and complicated. By improving on them, their application in fields such as chemical sensing, detection and analysis is possible. By implementing this on a chip, we can reduce the cost and improve portability. This thesis focuses on the investigation of a novel class of spontaneously patterned nanoporous organosilicate nanoparticle-based films …

Dominance Or Leverage? An Analysis Of Female Power In Captive Varecia, Jessie E. Birckelbaw

Graduate Research Theses & Dissertations

Lemurs are unusual in that, unlike in most other primates, females have more power than males. This is evident by females receiving priority access to foods and preferred spaces, and frequent grooming. Rebecca Lewis provided a framework to analyze the basis of female power that distinguishes between true dominance and leverage. Dominance is defined as the physical ability to overpower an individual, whereas leverage is the ability to influence others based on intangible resources, such as social currency like grooming or the potential for mating. This study aimed to investigate female power in the critically endangered ruffed lemurs (genus Varecia). …

Cultivating A Stem Investigation: Reading And Task Expectations For Introductory Biology Courses, Tina M. Ballard

Graduate Research Theses & Dissertations

College completion is an important discussion in today’s world with only about 30% of community college students completing their degrees within three years of starting their programs. Especially in the Science, Technology, Engineering, and Math (STEM) fields, students are changing their majors or not completing their degrees for a variety of reasons. Previous research has established that there are high attrition and failure rates for introductory biology courses which may be causing some students to change their majors or not complete their degrees. This multicase study investigated the reading and task demands for introductory biology courses designed for STEM majors …

A Quantitative Study Of Community College Student Re-Enrollment Choices And Outcomes After A D/F/W In An Online Class, Patricia Lee Clark

Graduate Research Theses & Dissertations

This quantitative study investigated community college student reenrollment choices, course-taking patterns, and course outcomes after a D/F/W in an online class. The sample included freshmen students with fewer than 30 credit hours, enrolled in a fully online or fully face-to-face (F2F) section of a gateway general education course. Individual-level institutional data were collected for five semesters. Reenrollment was defined as enrolling in the same course with two semesters of the D/F/W grade, and a successful 2nd Attempt was defined as received a final grade of “C or Better.” Preliminary descriptive statistics and course modality pattern analyses were conducted to profile …

Their Lessons: Inspiring Stories Of Ten Retired African American Volunteers Serving The Augusta, Georgia, Community, Gwendolyn Bentley Clayborne

Graduate Research Theses & Dissertations

African Americans found ways to respond to the needs of their communities as volunteers when they were denied many services available to Whites citizens. Opportunities to volunteer were provided both formally and informally through churches, sororities, fraternities and other organizations. Many families would not have been able to afford care for their children and/or elderly family members had it not been for other members of their family and friends volunteering to provide the needed services. Growing up in the early fifties, before starting to school, my first caregiver was Mr. Allen, an elderly man. His wife, who worked from home …

Diatoms And Their Response To Tectonic Gateway Changes: Case Studies From Southern Hemisphere Sites, Jason James Coenen

Graduate Research Theses & Dissertations

This dissertation covers three major transitions in Earth's climate system throughout theCenozoic (the past 65 million years of Earth's history). The progressive breakup of the super continent Pangea and the ultimate change in ocean circulation (and redistribution of heat) as a result of tectonic events dating back to the Mesozoic, primed Earth's climate system for cooling and ultimately bipolar glaciation. Climate transitions in three distinct environments were studied using absolute diatom abundance, diatom assemblages, and geochemical tracers of diatoms (i.e., biogenic silica weight%). Two geographic regions are the focus of this dissertation work. Region one is the Ross Embayment of …

Bidirectional Associations Between Parenting Practices And Child Conduct Problems: The Moderating Role Of Callous-Unemotional Behavior, Elizabeth R. Corning

Graduate Research Theses & Dissertations

A growing body of research has evidenced bidirectional associations between parenting practices and the development of conduct problems in children. However, studies examining the effect of child callous-unemotional (CU) behavior in the context of these reciprocal associations have produced mixed findings. This study used data from the Fragile Families and Child Wellbeing Study (N= 4,898) to investigate bidirectional associations between parenting practices (i.e., positive and harsh) and child conduct problems across ages 3, 5, and 9 and determine if these associations are moderated by child CU behavior. Cross-lagged panel analyses revealed that higher positive parenting at age 5 was associated …

Application Of Data And Geospatial Analysis In Energy And Health Systems, Ali Faghani

Graduate Research Theses & Dissertations

Having sustainable energy and health systems are the main factors in the vision plan of every country. Both of these systems are correlated with a variety of frameworks, including social, physical, technological, political, and economic factors. Therefore, different types of analytics methods can be implemented to develop the required assessments for those who make plans since understanding the effect of such factors individually, also their interactions, and the overall effect is crucial. With this regard, applications of data analysis and geospatial techniques in both energy, and health systems have recently gained attention. The proposed research here deployed advanced data analytics …

The Balance Of Online Learning: A Qualitative Case Study Exploring Online Students’ Decision Making And Experiences, Jessica Ashley Hill-Jones

Graduate Research Theses & Dissertations

Online learning is an evolving and growing aspect of higher education. Past research highlights the benefits of online learning, such as the flexibility and increased access it provides to students, as well as its drawbacks such as isolation, time management, and teacher presence. As the number of students who are pursuing their degrees online continues to increase, more research is needed to holistically understand the experiences of online learners.

The purpose of this qualitative case study was to explore what influences students’ decisions to pursue an online degree and their experiences once in the online program. Data was collected via …

Characterization Of Potential Anti-Infective Agents By Targeting Burkholderia Pseudomallei And Escherichia Coli Ispf, Dakota Lane Grote

Graduate Research Theses & Dissertations

With the likelihood of contracting an antibiotic resistant infection increasing, the need for novel anti-infective agents is critical. The development of novel anti-infective agents benefits from the identification of new target pathways necessary for the survival of the pathogen. One such target is the methylerythritol phosphate (MEP) pathway, responsible for the synthesis of the isoprenoid precursors isopentyl pyrophosphate (IPP) and dimethylallyl pyrophosphate (DMAPP) in bacteria and other pathogenic organisms. The MEP pathway is an attractive target because it is specific to a wide range of pathogenic organisms, while humans have a separate pathway, the mevalonate (MVA) pathway, for the biosynthesis …

Fly On The Wall: Comparing Arthropod Communities Between Islands With And Without House Mice (Mus Musculus), Wieteke A. Holthuijzen

Graduate Research Theses & Dissertations

Invertebrates are key to island ecosystems but impacts from invasive mammalian predators are not well documented or understood. Given this knowledge gap, we studied terrestrial arthropod communities in the presence of a common invasive rodent (house mice, Mus musculus) on a subtropical atoll—Midway Atoll National Wildlife Refuge (MANWR). Here, invasive mice recently began to attack and depredate nesting seabirds, prompting a mouse eradication. Although eradication planning efforts are underway, uncertainty remains regarding the ecosystem’s response to mouse removal. As part of a pre-eradication investigation, we conducted a baseline survey of MANWR’s arthropod community structure and diversity, comparing islands with and …

Traffic Fatality Rate Prediction Based On Deep Neural Network And Bayesian Neural Network, Yiqun Hu

Graduate Research Theses & Dissertations

There have been numerous studies on traffic accidents and their fatality rate. For this challenging machine learning regression problem, Neural Networks (NNs) have produced state-of-the-art data. Despite their success, they are often used in a fre- quentist scheme, which means they cannot account for uncertainty in their forecasts. BNNs are comprised of a Probabilistic Model and a Neural Network. The aim of such a design is to bring together the benefits of Neural Networks and stochastic modeling. Neural networks have the ability to approximate continuous functions uni- versally. Statistical models allow for the direct definition of a model with known …

Herlands: Imperial Feminisms From Charlotte Perkins Gilman To Wonder Woman, Anna Jankovsky

Graduate Research Theses & Dissertations

The society of women is a trope of feminist utopian fiction in which a group of women live together in harmony without the influence of men to disrupt their society. This trope functions on five criteria: 1) The society must be able to defend itself and replenish itself without the assistance of men. 2) It must be fully isolated and nearly impenetrable from the outside world 3) It must have a utopic order of society untroubled by ambition. 4) It must be infiltrated and challenged by a man during the course of the story. 5) It must grapple with the …

Coaxially Electrospun Fibrous Polymer Scaffolds For Tissue Regeneration And Drug Delivery, Matthew Michael Kleszynski

Graduate Research Theses & Dissertations

A biomaterial is a substance that is specifically engineered to take on a role within the body, either alone or in conjunction with other materials, with the purpose of influencing the body. Using Polymers as a biomaterial is an exciting field of study that has the potential to further our abilities to help those in need. Creating composite nanofibrous scaffolds composed of hydrophobic and hydrophilic polymers may outperform structures made of a single polymer in both in vitro and in vivo environments. Hydrophilicity governs the behavior of polymers in the body and has influence over the mechanical properties of the …

Testing A Global Standard For Quantifying Species Recovery And Assessing Conservation Impact, Molly K. Grace, John Carroll, 201 Other Scholars

School of Biological Sciences: Faculty Publications

Recognizing the imperative to evaluate species recovery and conservation impact, in 2012 the International Union for Conservation of Nature (IUCN) called for development of a “Green List of Species” (now the IUCN Green Status of Species). A draft Green Status framework for assessing species’ progress toward recovery, published in 2018, proposed 2 separate but interlinked components: a standardized method (i.e., measurement against benchmarks of species’ viability, functionality, and preimpact distribution) to determine current species recovery status (herein species recovery score) and application of that method to estimate past and potential future impacts of conservation based on 4 metrics ( …

Equality Of Autonomy? Physician Aid In Dying And Supported Decision Making, Megan S. Wright

Faculty Scholarship

The legalization of physician aid in dying (“PAID”) has been spreading across the United States and is currently legal in ten jurisdictions. Meant to respect autonomy at the end of life, PAID legislation is modeled after the Oregon Death with Dignity Act, which permits only terminally ill adults with contemporaneous decisional capacity to choose to hasten death with PAID. Right-to-die advocates and legal scholars have critiqued the strict eligibility requirements, which although meant to function as safeguards against mistakes and abuse, can be autonomy thwarting. Advocates and scholars have thus proposed using advance directives for PAID to expand access to …

Catalysis Of Chlorovirus Production By The Foraging Of Bursaria Truncatella On Paramecia Bursaria Containing Endosymbiotic Algae, Zeina T. Al-Ameeli, Maitham A. Al-Sammak, John Delong, David Dunigan, James L. Van Etten

School of Biological Sciences: Faculty Publications

Chloroviruses are large viruses that replicate in chlorella-like green algae and normally exist as mutualistic endosymbionts (referred to as zoochlorellae) in protists such as Paramecium bursaria. Chlorovirus populations rise and fall in indigenous waters through time; however, the factors involved in these virus fluctuations are still under investigation. Chloroviruses attach to the surface of P. bursaria but cannot infect their zoochlorellae hosts because the viruses cannot reach the zoochlorellae as long as they are in the symbiotic phase. Predators of P. bursaria, such as copepods and didinia, can bring chloroviruses into contact with zoochlorellae by disrupting the paramecia, which results …

Electrochemical Study Of The Performance Of Manganese Vanadium Oxide Cathodes In Zinc Batteries, Sarat Alabidun

Graduate Research Theses & Dissertations

Zinc metal batteries are considered a promising alternative for grid energy storage due to the low redox potential (-0.76V vs SHE) and high theoretical specific capacity (850mAh/g) of zinc metal anode as well as its compatibility with aqueous electrolytes. They however face issues of poor cathode stability and rapid capacity fading. Several methods have been devised to improve the stability of the cathode materials and develop novel cathode materials with better performance including the metal ion doping of intercalation materials.This study investigated the performance of zinc metal batteries with novel manganese vanadium oxide cathodes. Organic structure directing agents have been …

Carborane-Appended Levodopa For Prostate-Specific Membrane Antigen And Boron Neutron Capture Therapy, Alejandra Macias

Graduate Research Theses & Dissertations

A multi-step organic synthetic method to attach carborane cages to biocompatible organic compounds for application in Boron Neutron Capture Therapy (BNCT) was conducted. Boron Neutron Capture Therapy is a form of radiation therapy that promises a new and effective form of cancer treatment that involves the destruction of tumor cells using an isotope of boron (10B). The effectiveness of this therapy depends on the boron content accumulated in cancerous tissue. Carboranes are boron-rich clusters that possess unique physical and chemical properties making them suitable for a wide range of applications including medicinal chemistry. Because of their high boron content, carborane-appended …

The Transcorporeal South: Bodies And Ecologies In Twentieth-Century Southern Literature, Tiffany Morgan Messick

Graduate Research Theses & Dissertations

This dissertation proposes that transcorporeality offers an alternative to Cartesian dualistic modes of embodiment in Walker Percy’s, The Moviegoer, Zora Neale Hurston’s, Their Eyes Were Watching God, Richard Wright’s, Native Son, and Carson McCullers’s The Heart is a Lonely Hunter. Opposing the division between mind and body as theorized by René Descartes, transcorporeality advances the body’s porosity, maintaining that the individual is enmeshed within the material world and that this entanglement consubstantiates consciousness. Examining the works of Descartes, focusing especially on the ways that Cartesian ideas have been applied in Southern culture, I contend that a Cartesian definition of subjectivity, …

The Influence Of Resting Metabolic Rate And Environment On Tonic Immobility In A Parasitoid Wasp (Hymenoptera: Pteromalidae), Ryan D. Morris

Graduate Research Theses & Dissertations

The effects of RMR (resting metabolic rate) and environment on tonic immobility were examined in the parasitoid wasp Spalangia cameroni (Order Hymenoptera: Family Pteromalidae). Tonic immobility (TI) is described as a state that an organism enters wherein they fall onto their back or side and become immobile for a period of time when disturbed. This state can last for several seconds to a few hours, depending on the organism in question. The organism may be aware during this period of time but unable to move. Female wasps were subjected to experimental treatments that involved manipulation of their environment, specifically, cold …

Design And Optimization Of Superconducting Radio-Frequency Electron Sources, Osama Mohsen

Graduate Research Theses & Dissertations

High brightness electron beams are an essential component that drives current and future accelerators and accelerator-based light sources including Free-Electron lasers (FELs), electron cooling experiments, and compact ultrafast electron probe setups (e.g. ultrafast electron diffraction). In FEL, the possible use of a superconducting radiofrequency (SRF) electron gun to support the generation of high-repetition-rate bright-beam can produce copious amounts of radiation over a broad range of the electromagnetic spectrum which can be used in several scientific experiments while in electron probes, the use of SRF gun can enable the generation of high brightness electron beams at high repetition rates, e.g., necessary …

A Qualitative Evaluation Of A Pre-College Summer Program: The Research Apprentice Program, Stanford B. Oglesby Iii

Graduate Research Theses & Dissertations

The Research Apprentice Program is a pre-college, summer enrichment program that seeks to recruit underrepresented students into the field of agriculture and the College of ACES at the University of Illinois. The program has been in operation for more than thirty years and has reported many successes. Among these successes are a recruitment rate of 55% and a graduation rate of 96%. This program has yet to be formally evaluated. This study was conducted to provide a formative evaluation of the program to assess if the intended outcomes of the administrative participants are consistent with the lived experiences of the …

Blood Flow Simulation In A Microvascular Network, Kacper Ostalowski

Graduate Research Theses & Dissertations

Cardiovascular disease such as heart attack or stroke has been the leading cause of death in the US for over 100 years. Understanding the blood cell transport physics in a vascular network is important in both fundamental research and clinical practices. In this study, 3Dnumerical simulations on blood flow in a complex retina vascular network were performed considering deformable red blood cells (RBCs), white blood cells (WBCs), and obstructed vessels. The blood was modeled as a mixture of RBCs and WBCs suspended in fluid. The fluid was solved using the lattice Boltzmann method (LBM), and blood cells were modeled by …

Longitudinal And Concurrent Contributions Of Verbal And Physical Scaffolding To Toddlers’ Inhibitory Control, Anton Petrenko

Graduate Research Theses & Dissertations

Executive function (EF) is crucial to lifespan development and environmental factors have been found to impact its development. Previous research has shown that parenting can make meaningful impacts on children’s EF, with scaffolding receiving broad support. Scaffolding refers to an adult’s ability to guide a child through a challenging task without providing too much or too little support. However, many of the studies which have examined scaffolding have been done in preschool- and school-aged samples, with limited research conducted in younger samples. Very few studies have separately examined verbal and physical components of scaffolding, which may differentially contribute to children’s …

Barcode Biosensors Based On Surface Plasmon Resonance, Sneha Ramesh

Graduate Research Theses & Dissertations

Affordable and easy to use biological assays are the current need of the day owing to the rising cost of health care within the US and worldwide. The goal of this thesis is to develop a sensitive label-free biosensing scheme exploiting surface plasmon resonance (SPR) that yields the sensor output in an easy-to-read optical bio-barcode format for high through put and multiplexed medical diagnostics. Through this research, we would like to investigate if SPR phenomena can be achieved by fabricating SP supporting metallic structures over a nanoporous dielectric layer whose optical constants are progressively varied across the substrate in a …

The Monster As Queer Opportunity: Monstrous (Re)Construction, Embodiment, And Approbation On The Boulet Brothers' Dragula, Adam Harrison Reedy

Graduate Research Theses & Dissertations

While mainstream tides in the drag industry have largely come to signify the art form’s growing popularity, there exist multiple alternative artists and communities who have yet to find space for their expressions to thrive and find praise. The Boulet Brother’s Dragula is constructed out of such need, giving a space to alternative, radical, or “monster” drag artists who have experienced the pains of ridicule, alienation, and alterity in both queer and heteronormative spaces. Prior research on drag artistries has often glossed over alternative drag artistries, comparing them to popular or heteronormative representations while also focusing disproportionately on gender presentation. …

The Gut Microbiome Of Hapalemur Griseus Griseus, Propithecus Diadema, And Propithecus Coquereli: A Comparative Study Between Wild And Captive Lemur Species, Brenna Ritchie

Graduate Research Theses & Dissertations

Madagascar is home to thousands of endemic species, making it a biodiversity hotspot that is rapidly losing its fauna due to deforestation and human expansion. Efforts to restore and preserve this unique island are ongoing and several researchers have placed their focus on preventing species extinctions. One research avenue that can help contribute to these efforts is to study health and wellness of animals located in areas affected by these changes. In this study, I sought to characterize microbial community composition of two native lemur species found in Madagascar and compare those profiles to similar species found in captivity in …

Tailoring Thermoresponsive Poly(N-Isopropylacrylamide) Toward Sensing Perfluoroalkyl Acids, Dustin Thomas Savage

Theses and Dissertations--Chemical and Materials Engineering

Widespread distribution of poly- and perfluoroalkyl substances (PFAS) in the environment combined with concerns for their potentially negative health effects has motivated regulators to establish strict standards for their surveillance. The United States Environmental Protection Agency issued a cumulative domestic threshold of 70 ppt for water supplies, and this bar is even lower in some local districts and other countries. Monitoring PFAS consequently requires sensitive analytical equipment to meet regulatory specifications, and liquid chromatography with tandem mass spectroscopy (LC/MS/MS) is the most common technique used to satisfy these requirements. Though extremely sensitive, the instrument is often burdened by pretreatment regimens, …

Development Of Novel Polymeric Materials For Their Application In Monitoring And Remediation Of Environmental Pollutants, Rishabh Shah

Theses and Dissertations--Chemical and Materials Engineering

Remediation of environmental pollutants from water is one of the major challenges in the 21st century. Utilizing novel polymeric materials to accomplish this challenge has garnered a lot of interest in recent times. Flexibility in synthesizing as well as functionalizing makes them attractive for their application in pollutant remediation. This work is based on development and characterization of novel crosslinked polymeric as well as linear polymeric materials from biphenyl-based monomers, biphenyl based crosslinker and a temperature responsive monomer (Nisopropylacrylamide (NIPAAm)) for their application in remediation of toxic pollutants such as polychlorinated biphenyls (PCBs), polyaromatic hydrocarbons (PAHs) and iron oxide nanoparticle …