Digital Commons Network^™

Synthesis Of Graphitic Nanostructures On Noble Metals, Amelie Adele Parmentier

Theses and Dissertations

In this research, two subjects are studied: the growth of graphene from various catalysts with RF-CVD and the growth of graphitic nanostructures from gold-decorated graphene with RF-CVD. In the first topic, various catalysts are made with magnesium oxide and metal nanoparticles: iron, silver and gold. Using a radio-frequency generator, these catalysts are heated and placed in contact with three gases (argon, hydrogen and methane). By controlling various parameters, graphene synthesis can happen. The results are analyzed with Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Thermo-gravimetrical analysis (TGA), and X-ray diffraction (XRD). In the second topic, commercial graphene is functionalized …

Synthesis And Characterization Of Neo-Confused Porphyrins And Related Systems, Arwa Salem Almejbel

Theses and Dissertations

Carbaporphyrins have been the focus of many studies, and a wide variety of related carbaporphyrinoid systems have been reported. N-confused porphyrins are a class of carbaporphyrins where one pyrrole unit has been inverted. In this work, a newly discovered family of porphyrin isomers where one of the pyrrolic subunits is connected to the meso-bridges in a 1,3-fashion, called neo-confused porphyrins, has been investigated.

Reaction of pyrrole-3-carbaldehydes with acetoxymethylpyrroles and NaH in DMF gave neo-confused dipyrrylmethane dialdehydes. The resulting dialdehydes underwent an acid catalyzed condensation with a dipyrrylmethane to give neo-confused phlorins, and following oxidation with FeCl3 afforded new neo-confused porphyrins. …

The Detection And Molecular Evolution Of Francisella Tularensis Subspecies, Mark K. Gunnell

Theses and Dissertations

Francisella tularensis is the etiological agent of tularemia, a zoonotic disease with worldwide prevalence. F. tularensis is a highly pathogenic organism and has been designated as a potential biothreat agent. Currently there are four recognized subspecies of F. tularensis: tularensis (type A), holarctica (type B), mediasiatica, and novicida. In addition, genomic studies have further subdivided type A tularensis into two subclassifications, type A.I and type A.II. These two subclassifications differ in geographic distribution with type A.I appearing mainly in the Eastern United States and type A.II appearing mainly in the Western United States. Because of differences of virulence among the …

Muze Etnografik, Armend Begisholli

Theses and Dissertations

Bukuritë fizike të shqiptarit gërshetuar me ato të natyrës, ambientit ku ai jeton, qëndron e gjallëron përball stuhive të shumta të jetës fuqizohen edhe më veshjet kombëtare që padyshim se janë ditari më i mirë që flasin për rrjedhën e jetës, historinë e bujshme shqiptare me të gjitha sfidat. Muzetë etnografik moden e eskpresiv si një ndër pikat kryesore të shpalosjes së historise së veshjeve vërehet qartë qe i mungojn shtetit të Kosovës, andaj, duhet pasur si qëllim trajtimin e muzeve etnografik si ndërtim arkitektonik me karakteristika të arkitekturës moderne dhe tek i cili kemi gjithëpërfshirje të kulturës sonë e …

A Path To Empathy: Child And Family Communication, Sarah Ann Stone

Theses and Dissertations

This longitudinal study examined the association between communication in the family on the development of empathy in young children. Co-regulation and family expressiveness measured communication in parent-child dyads at age 12 months (N = 186), 24 months (N = 100), and 36 months (N = 78). A follow-up was conducted at 60 months (N = 47) to measure empathy-related responding in children. Co-regulation styles change over time, generally increasing in the most engaged, two-way style of communication (symmetrical) and decreasing in one-sided and less engaged types. Greater family expressiveness predicted higher levels of empathy as observed in an empathy-eliciting experiment, …

Alternating Direction Implicit Method With Adaptive Grids For Modeling Chemotaxis In Dictyostelium Discoideum, Christopher F. Loomis

Theses and Dissertations

Dictyostelium discoideum (Dd) is a model organism, studied for reasons from cell movement to chemotaxis to human disease control. Creating a computer model of the life cycle of Dd has garnered great interest, one part of which is the Aggregation Stage, where thousands of amoeba gather together to form a slug. Chemotaxis is the mechanism through which this is accomplished. This thesis develops two- and three-dimensional alternating direction implicit code which solves the diffusion equation on an adaptive grid. The calculated values for both two and three dimensions are checked against the actual solution and error results are provided. Comparisons …

The Anatomy Of Porcine And Human Larynges: Structural Analysis And High Resolution Magnetic Resonance Imaging Of The Recurrent Laryngeal Nerve, Nena Lundgreen Mason

Theses and Dissertations

The recurrent laryngeal nerve (RLN) innervates all the intrinsic muscles of the larynx that are responsible for human vocalization and language. The RLN runs along the tracheoesophageal groove bilaterally and is often accidentally damaged or transected during head and neck surgical procedures. RLN palsy and vocal cord paralysis are the most common and serious post op complications of thyroid surgeries. Patients who suffer from RLN injury can develop unilateral or bilateral vocal fold paralysis (BVFP). Theoretically, selective reinnervation of the posterior cricoarytenoid muscle would be the best treatment for BVFP. The phrenic nerve has been shown in several studies to …

Lignin-Derived Thermosetting Vinyl Ester Resins For High Performance Applications, Daniel Rogers

Theses and Dissertations

Vinyl ester (VE) resins are utilized to produce polymer matrix composites for use in a wide range of applications due to possessing relatively high moduli, strengths, and glass transition temperatures while maintaining low weight and cost. VE resins often contain high concentrations of a petroleum-based reactive diluent (RD), such as styrene. Many of the commonly used RDs have been designated as hazardous air pollutants, potential carcinogens, and volatile organic compounds. Renewable VE resins and RDs with similar performance to petroleum-based RDs are desired to potentially mitigate the aforementioned hazards as well as to facilitate the transition from petrochemical feedstocks to …

Multiple Detector Wireless Fnirs Sensor To Detect Hemodynamic Activity, Sivaram Karra

Theses and Dissertations

An established, non-invasive and flexible technique, "functional Near Infra-Red Spectroscopy" (fNIRS), has opened new opportunities for the study of brain functionality. This powerful method uses the optical properties of a tissue at multiple near infra-red wavelengths to dynamically determine the levels of both oxygenated hemoglobin (HbO2) and deoxygenated hemoglobin (Hbr). Traditional techniques such as functional Magnetic Resonance Imaging (fMRI), Positron Emission Tomography (PET), Electroencephalography (EEG) and Event Related brain Potentials (ERP) have increased our understanding of brain functionality, however, the basic limitations of these technologies such as high cost of equipment, difficulty of operation and levels of radiation make access …

Fan The Flames Of Discontent: Contemporary Labor Literature And Social Movements, Ericka Rae Wills

Theses and Dissertations

Fan the Flames of Discontent: Contemporary Labor Literature and Social Movements balances a literary approach to textual analysis with socially grounded reflections on diverse worker organizations. Chapters analyze Leslie Marmon Silko's Almanac of the Dead, Helena Maria Viramontes's Under the Feet of Jesus, and Thomas Pynchon's Against the Day alongside worker-writers' texts and testimonies, such as Fran Leeper Buss and María Elena Lucas's Forged under the Sun / Forjada bajo el sol and The Heat: Steelworker Lives and Legends, a collection of United Steelworkers' Institute for Career Development writings. In each of five chapters, this dissertation respectively discusses how literature …

The Effects Of Modafinil And Atomoxetine On Dopamine Signaling In The Striatal Subregions Of The Rat, Martin Bobak

Theses and Dissertations

In an effort to combat diseases and disorders that impede our health, comfort and well-being, an abundance of prescription drugs have emerged in the past 60 years. Many prescription drugs have remarkable efficacy for treating the primary symptoms of these diseases and disorders; however, some drugs carry negative side effects that impose their own adverse symptoms, albeit, often to a lesser degree than the primary symptoms. Thus, one of the main objectives of the pharmaceutical industry is to innovate and develop novel therapeutics, which remediate the primary symptoms of disease and lack undesirable negative side effects. However, in order to …

Can Non-Haptic Manipulation Of Temperature Influence The Same Emotions As Ostracism?, Rebecca Ann Oglesby

Theses and Dissertations

I explored the possibility that temperature can alter the same variables affected by ostracism (i.e., being ignored and excluded): belonging, control, meaningful existence, and self-esteem need satisfaction, feelings of ostracism, mood, and loneliness. According to the theory of embodied cognition, individuals can associate physical warmth with social intimacy, as well as cold temperatures with social isolation (Zhong & Leonardelli, 2008; IJzerman et al., 2012). Bargh and Shalev (2012) found that participants holding a cold pack reported higher loneliness than participants holding a neutral or warm pack. My study expands upon Bargh and Shalevâ??s (2012) findings by examining more emotions frequently …

Exploring The Dark Side: Investigating The Relationship Between Creativity And Perceptions Of Dishonesty, Kiera Michelle Dymit

Theses and Dissertations

Previous studies have reported a connection between creativity and dishonesty (Beaussart, Andrews, & Kaufman, 2013; Gino & Ariely, 2012; Gino & Wiltermuth, 2014). This study attempts to investigate these finding further, and empirically connect the number of justifications provided or produced for a dishonest behavior to the perceived acceptability of the behavior. 203 participants were given two tasks involving evaluating and justifying dishonest behavior. Those who scored high on the Creative Behavior Inventory were able to produce significantly more justifications overall, but not those who scored high on the Creative Personality Scale. The total number of justifications produced was correlated …

Using An Agent-Based Model To Study The Effect Of Reproductive Skew On Mongoose Populations, Stacy Lee Mowry

Theses and Dissertations

Reproductive skew is the name given to the unequal partitioning of breeding

within social groups. Within these groups a mating hierarchy emerges wherein one dominant mating pair holds an unproportional majority of the group's reproductive benefit, while other members mate infrequently, yet allocate energy and resources toward the offspring of the dominant group members. In this paper, we use an agent-based model, which mimics dwarf and banded mongoose populations, to investigate how reproductive skew aftects the speed natural selection, and thus how reproductive skew affects fitness. The results of the model show that due to the geometric structure of skewed …

Examining The Sources Of Teacher Efficacy And How The Context Of Teaching Contributes To Teacher Efficacy, Leah Selbie

Theses and Dissertations

Early education researchers posited that a student’s background was the primary factor in academic achievement and there was little that teachers could do to overcome this source (Coleman, Campbell, Hobson, McPartland, Mood, Winefield & York, 1966). In response to this bleak outlook in education, researchers have searched for factors that can make a difference in student achievement, regardless of home environment. Selfefficacy, which “refers to beliefs in one’s capabilities to organize and execute the courses of action required to produce given attainments,” (Bandura, 1997, p. 3), has been an important concept in educational research for teachers (Pajares, 1992). Schacter and …

Repeated Trait Evolution Driven By Divergent Natural Selection At Early And Late Stages Of Speciation, Spencer J. Ingley

Theses and Dissertations

Speciation – the process by which new species arise – is of fundamental importance in the biological sciences. The means by which new species arise, and the relationship among living species, has been a topic that has captivated both lay and scientific observers for centuries. In recent years, the study of speciation has enjoyed increased attention, resulting in significant advances in our understanding of how species form. Although our understanding of the processes that contribute to speciation has increased dramatically in recent years, our knowledge of how reproductive barriers accumulate as speciation proceeds is still limited. Thus, studies that evaluate …

Mass Spectrometry Based Proteomics And Lipidomics Studies, Huan Kang

Theses and Dissertations

Mass spectrometry has emerged as having a vital role in various applications to biochemical fields. In this thesis, we have utilized a variety of mass spectrometry techniques for both bacteriophage proteomics and colostrum and milk lipidomics studies. Our first study was the proteome characterization of Great Salt Lake bacteriophage NS01 with SDS-PAGE GEL to separate the viral proteins and high performance liquid chromatography (HPLC) coupled with an LTQ Orbitrap to identify the proteins after in-gel digestion. In this project, we have successfully identified 11 proteins with high confidence, p-values < 0.01, including coat protein gp88 with a coverage of 91% and tail protein gp86 with a coverage of 40.96%, which facilitated the classification of NS01 as a T7-like phage. Our second study was the discovery of colostrum and milk biomarkers that can be used to predict the likelihood of development of production-related metabolic diseases (PRMDs) in dairy cows through a lipidomics approach. In this study, an electrospray ionization, time-of-flight mass spectrometer was applied to lipid profiling, quantification and significant biomolecule selection. A Q-Star quadrupole, orthogonal time-of-flight mass spectrometer and an Agilent 6530 accurate-mass quadrupole/time-of flight mass spectrometer were both used for lipid biomarker fragmentation and identification. According to linear discriminative statistical modeling, three panels of biomarkers were defined. A combination of 2 milk lipid predictors, including DG18:0/18:0 and TG 18:0/18:0/18:1, provided PRMD predictions with 75.0% sensitivity at 90.0% specificity. A combination of 3 colostrum lipid predictors, including TG16:0/18:1/18:3, DG16:0/16:0 and C₄₀H₆₀NO, provided PRMD prediction with 90.0% sensitivity at …

Design And Validation Of A Complex Loading Whole Spinal Segment Bioreactor, Amanda Marie Beatty

Theses and Dissertations

Intervertebral disc (IVD) degeneration is a prevalent health problem that is highly linked to back pain. To understand the disease and tissue response to therapies, ex-vivo whole IVD organ culture systems have recently been introduced. The goal of this study was to develop and validate a whole spinal segment culturing system that loads the disc in complex loading similar to the in-vivo condition, while preserving the adjacent endplates and vertebral bodies. The complex loading applied to the spinal segment was achieved with three pneumatic cylinders. The pneumatic cylinders were rigidly attached to two triangular alumni plates at each corner, comprising …

Image-Charge Detection €“ Novel Instrumentation And Applications, Brandon Lee Barney

Theses and Dissertations

Image-charge detection is an analytical technique in which a highly-charged particle is detected by the magnitude of the image current that it generates in a detecting electrode. This current is represented as a voltage between the charged particle and the sensing electrode. It is a single particle detection method, ideal for the analysis of large, variable mass particles such as biological cells. Some of the physical properties of Bacillus subtilis spores were explored using different applications of image-charge detection. B. subtilis is a gram-negative spore-forming bacteria that has been shown to exhibit extremophile behavior. The particular extremophile behavior that was …

Biophysical Properties Of Cellular Membranes In Gram-Positive Bacterial Pathogens And Their Impact On Major Physiological Attributes And Virulence Determinants, Suranjana Sen

Theses and Dissertations

The cytoplasmic membrane of bacterial cells, forming an essential barrier from the surroundings, is a critical component of cellular physiology ensuring proper survival and maintenance of major cellular functions. The integrity of the membrane is an important feature that plays an essential role in the transport of solutes and nutrients through active and passive pathways, functions of membrane-associated proteins, electron transport and ATP synthesis, maintaining turgor pressure and combating environmental stresses, and thus is a crucial factor of a majority of cellular adaptations. The various biophysical properties affecting the integrity of this membrane are mainly determined by the composition and …

Genomic Deoxyuracil: Targeting, Regulation And Repair, Nate Warren Holton

Theses and Dissertations

Maintaining genomic integrity is critical to avoid sequence mutations and genetic disease. However the immune system requires genomic rearrangements in order to produce novel antibodies and illicit a full immunological response. The expression of DNA modifying enzymes is essential for antibody production but the off target effects are not well understood. The work presented here was performed to elucidate molecular mechanisms responsible for the regulation and targeting of DNA editing enzymes, as well as characterize repair of these lesions at off target loci.

Living Between Dialectics: A Bakhtinian And Lacanian Reading Of Jade Snow Wong's Fifth Chinese Daughter And Maxine Hong Kingston's The Woman Warrior, Xiaojun Luo

Theses and Dissertations

This dissertation creates a dialogic web encompassing the sociocultural and psychological aspects of Jade Snow Wong's and Maxine Hong Kingston's autobiographies Fifth Chinese Daughter and The Woman Warrior. The American mainstream society and Chinese patriarchal community have conceived insurmountable ethnic and gender differences that are inherent in Wong's and Kingston's growing-up environment. The dissertation argues that how the two authors perceive the way of how these differences have been conceived is central to our understanding of their representations of ethnic female consciousness when they are writing as both subjects and writers. The dissertation notes, to be more specific, Wong's and …

Analysis Of Hypersonic Vehicle Wakes, Matthew A. Kania

Theses and Dissertations

As advancements are made with ballistic missiles, particularly in the area of hypersonic bodies, there is a growing need to advance the methods of detecting these new ballistic weapons. As a result, the National Air and Space Intelligence Center has asked the Air Force Institute of Technology to examine the wake region behind hypersonic bodies. A thorough understanding of the aerothermal phenomena and the chemical reactions occurring in the wake region will enable an advancement of tracking hypersonic bodies. This research examined the wake region behind a hypersonic body using computational fluid dynamics.
This study used Pointwise® to develop a …

Modeling Radiation Effectiveness For Inactivation Of Bacillus Spores, Emily A. Knight

Theses and Dissertations

This research models and analyzes the inactivation of Bacillus spores following a radiation exposure and the process enacted by the Bacillus spore to repair the resulting damage. Irradiation of a spore and the medium surrounding the spore induces chemical reactions that produce reactive oxygen species (ROS). This research will consider the reaction- diffusion of these ROS throughout the spore. These ROS can react with the spore's DNA and enzymes to degrade them to such an extent that the DNA cannot be repaired or replicated, thus causing spore death. In order to survive a dose of radiation, a spore must repair …

Testing The Adequacy Of A Semi-Markov Process, Richard S. Seymour

Theses and Dissertations

Due to the versatility of its structure, the semi-Markov process is a powerful modeling tool used to describe complex systems. Though similar in structure to continuous time Markov chains, semi-Markov processes allow for any transition time distribution which enables these processes to t a wider range of problems than the continuous time Markov chain. While semi-Markov processes have been applied in fields as varied as biostatistics and finance, there does not exist a theoretically-based, systematic method to determine if a semi-Markov process accurately fits the underlying data used to create the model. In fields such as regression and analysis of …

Network Analysis With Stochastic Grammars, Alan C. Lin

Theses and Dissertations

Digital forensics requires significant manual effort to identify items of evidentiary interest from the ever-increasing volume of data in modern computing systems. One of the tasks digital forensic examiners conduct is mentally extracting and constructing insights from unstructured sequences of events. This research assists examiners with the association and individualization analysis processes that make up this task with the development of a Stochastic Context -Free Grammars (SCFG) knowledge representation for digital forensics analysis of computer network traffic. SCFG is leveraged to provide context to the low-level data collected as evidence and to build behavior profiles. Upon discovering patterns, the analyst …

Development Of Enzymatic Biofuel Cell For Glucose Sensor Application, Ashar Turky Abd

Theses and Dissertations

For several decades, biological fuel cells have drawn significant attention as alternative power sources since they are environmentally friendly and less expensive, compared to the conventional noble metal-based fuel cells. Some enzymatic biocatalysts such as glucose dehydrogenase and glucose oxidase consume glucose as fuel, generating electric currents if paired with an oxygen reduction electrode. While microbial biofuel cells inevitably require a physical barrier or proton exchange membrane between anode and cathode, enzyme-based biofuel cells allow a membraneless or single compartment design, since enzymes are very selective on redox species. For example, glucose dehydrogenase oxidizes the glucose fuel only, while it …

Multi-Target Therapeutic Evaluation Of Phytochemicals To Analyze The Ethnobotanical Applications In Current Medical Therapy Using Computational And Bioinformatics & Computational Biology Approaches, Venkata Kiran Kumar Melapu

Theses and Dissertations

Traditional medicinal knowledge originated when ancient humans began treating their ailments and those of their livestock by systematically using plants and/or plant extracts. This knowledge has been transmitted across generations by verbal testimony and in writing through Vedic manuscripts. This study was undertaken to conserve the traditional medicinal knowledge and to evaluate the applications of traditional treatments on current systems of medical practice. Medicinal plant inventory was prepared with plants collected from five different states of southern India: Telangana, Andhrapradesh, Tamilnadu, Karnataka, and Kerala. The collected medicinal plants were classified and segregated based on the ailments these plants treat. Further, …

Implementation Of Web 2.0 As An Instructional Tool: Experiences Of Language Arts Teachers, Elizabeth Wyatt

Theses and Dissertations

The purpose of this study was to explore the integration of Web 2.0 tools in language arts classrooms and teachers’ beliefs about the value of Web 2.0 tools as well as their beliefs about the effectiveness of technology-based professional development. Cross-sectional surveys were administered to language arts teachers to identify how they were using Web 2.0 tools in their classrooms, their beliefs in the value of Web 2.0 tools to enhance instruction and student learning, and to provide a better understanding of the effectiveness of technology-based professional development. The major findings in the study were that the majority of teachers …

The Use Of Language To Scaffold Students’ Meaning-Making Process During Literature Discussions, Kayla D. Lewis

Theses and Dissertations

This qualitative case study with multiple-case design was conducted to determine how language was used to scaffold students’ thinking during literature discussions in order to facilitate the meaning-making process. Participants included three fifth-grade teachers and their literature discussion groups. Two research questions guided the research process: 1) How do teachers use language to scaffold students’ meaning-making process during literature discussions? 2) How do students internalize mediation provided by the teacher and use language to support the meaning-making process of their peers during literature discussion? From a sociocultural standpoint, Vygotsky’s (1978) theory of assisted performance, along with Wood, Bruner, and Ross’ …