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Did Tardigrades Survive The Last Glacial Maximum In Antarctica?, Caj Johansson, Byron Adams May 2015

Did Tardigrades Survive The Last Glacial Maximum In Antarctica?, Caj Johansson, Byron Adams

Journal of Undergraduate Research

The current belief of the majority of glaciologists is that during the last glacial maximum (LGM), 17,000-22000 years ago, the entire Antarctic continent was completely covered in ice (Convey, 2008). This would mean that all terrestrial organisms would have died out during this time, essentially leaving Antarctica without life. If this hypothesis is true then all terrestrial organisms found currently in Antarctica arrived after the LGM (the past 12-18,000 years), a very short time frame for speciation to occur. Tardigrades are microscopic terrestrial animals that are most closely related to Arthropods and Nematodes (Edgecombe, 2011 but see also Longhorn, 2007). …

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Lymphoblastoid Cell Line Generation From Sle Patient Lymphocytes, Vera Mayhew, Brian Poole May 2015

Lymphoblastoid Cell Line Generation From Sle Patient Lymphocytes, Vera Mayhew, Brian Poole

Journal of Undergraduate Research

Epstein-Barr Virus (EBV) is one of the viruses found most frequently in the human population. Approximately 95% of the population is infected in the United Sates by the age of 40. When primary infection occurs is young adulthood approximately 50% of cases result in infectious mononucleosis. Whether EBV infection results in mononucleosis manifestations or not, the virus stays latent in the infected individual’s B cells for the rest of their life.

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How Chemokine Ccl28 Binds To Yersinia Pseudotuberculosis, Jeffrey Moffat, David Erickson May 2015

How Chemokine Ccl28 Binds To Yersinia Pseudotuberculosis, Jeffrey Moffat, David Erickson

Journal of Undergraduate Research

Chemokines are tiny proteins that play a valuable role in defending our bodies against bacteria and other pathogens. Chemokines are best known for their role in attracting immune cells to areas of infection. Some chemokines, however, have demonstrated the ability to not only recognize pathogens and/or recruit white blood cells, but also to kill various classes of bacteria and fungi1. One of these antimicrobial chemokines is CCL28.

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P. Larvae Bacteriophages As A Treatment For American Foulbrood In Honeybees, Bryan Merrill, Sandra Burnett May 2015

P. Larvae Bacteriophages As A Treatment For American Foulbrood In Honeybees, Bryan Merrill, Sandra Burnett

Journal of Undergraduate Research

The deadly honey bee disease American Foulbrood (AFB) is caused by the bacterium Paenibacillus larvae. The widespread use of antibiotics to prevent or treat AFB has led to many drug-resistant strains of P. larvae. Bacteriophages can target and destroy specific strains of bacteria and can be used to treat bacterial infections. This study accomplished two main goals. We determined the efficacy of previously isolated P. larvae phages as a treatment for AFB by applying a phage spray to infected beehives. We also isolated P. larvae bacteria from the infected hives we treated and identified phages to better counteract …

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Effects Of Blocking Tlr 4 And Rage On The Progression Of Oa In The Tmj, David Mecham, David Kooyman May 2015

Effects Of Blocking Tlr 4 And Rage On The Progression Of Oa In The Tmj, David Mecham, David Kooyman

Journal of Undergraduate Research

Osteoarthritis is a degenerative disease of the cartilage that affects more than 80% of Americans above the age of 65 (1). Many adults also suffer from Temporomandibular joint dysfunction (TMD), and 80% of such individuals eventually develop Temporomandibular joint associated Osteoarthritis (TMJ OA) (2). Current pharmaceutical options target symptoms of OA, but there are no known treatments available. Research is being undertaken to elucidate the root causes of the disease at a cellular level. Our lab has previously shown that mice lacking the Receptor for Advanced Glycation End Products are protected from OA (3). Other researchers have shown that blocking …

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Effect Of Ebi2 On B Cell Migration, Jeffrey Mella, Brian Poole May 2015

Effect Of Ebi2 On B Cell Migration, Jeffrey Mella, Brian Poole

Journal of Undergraduate Research

My mentored research project was a terrific experience. I have been mentored with Dr. Brian Poole for the last three years. As a result of the project that was made possible by the ORCA grant, I was the first author on an abstract submitted and accepted by the International Immunology Summit. This last October I attended the International Immunology Summit in Las Vegas, Nevada. Dr. Poole and I presented our research and I responded to questions from the audience. I am currently an author on a manuscript that in progress that has been submitted for review. I have enjoyed my …

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Hyperosmolarity And Trophoblast Behavior In Gestational Diabetes, Preeclampsia, And Intrauterine Growth Restriction, Camilo Mejia, Juan Arroyo May 2015

Hyperosmolarity And Trophoblast Behavior In Gestational Diabetes, Preeclampsia, And Intrauterine Growth Restriction, Camilo Mejia, Juan Arroyo

Journal of Undergraduate Research

Pregnancy necessitates interactions between the mother and the fetus, and the placenta is the medium through which this is accomplished. Many complications during pregnancy, such as intrauterine growth restriction (IUGR) and preeclampsia (PE) arise from abnormalities in trophoblast cells of the human placenta. Trophoblast cells form the connection between the fetus and the uterine wall. We see placental hyperosmolarity in pregnant patients with diabetes, and there are some reports of aberrant trophoblast functioning during IUGR and PE at term, but more needs to be studied regarding the hyperosmolar stress associated with these pathologies and its role in embryo development. Deviation …

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Genome-Wide Association Study Of Cerebrospinal Fluid Prostatic Acid Phosphatase Levels, Lyndsay A. Staley, John S. K. Kauwe May 2015

Genome-Wide Association Study Of Cerebrospinal Fluid Prostatic Acid Phosphatase Levels, Lyndsay A. Staley, John S. K. Kauwe

Journal of Undergraduate Research

In genome wide association studies (GWAS), the use of endophenotypes, or intermediate traits, have been found to provide novel insights into understanding the genetics of complex human disease and the pathways and proteins associated with them. Cerebrospinal fluid (CSF) has been shown to contain analytes that may provide promising insight into disease pathways that may not be identified using blood or other biological fluids. The analytes were selected from the Rules Based Medicine, Inc. (RBM) (Austin, TX) Human Discovery Panel 1.0, which includes a range of signaling, structural, and trafficking proteins that have previously shown relationships with human disease pathology. …

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Diverging Predation Environment Between Two Sister Species Of Live Bearing Fish: Boldness, Activity, And Exploration., David Money, Jerald B. Johnson May 2015

Diverging Predation Environment Between Two Sister Species Of Live Bearing Fish: Boldness, Activity, And Exploration., David Money, Jerald B. Johnson

Journal of Undergraduate Research

Our study takes advantage of a unique species pair within Brachyrhaphis, Brachyrhaphis roseni and B. terrabensis,, which provides insight into how divergence proceeds once speciation is complete. Brachyrhaphis roseni and B. terrabensis are sister species that occur in the same river drainages throughout northwestern Panama. A similar pattern occurs between these two species as occurs within other species of Brachyrhaphis, such that B. roseni lives in the presence of ambush predators (e.g., Hoplias microlepis and Gobiomorus dormitor) in lower elevation streams, and B. terrabensis, lives in largely predator-free, higher elevation streams. Therefore, using B. roseni and …

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Effects Of Phosphorous Availability On Nematode Growth And Morphology In Vitro, Ammon Perkes, Byron Adams May 2015

Effects Of Phosphorous Availability On Nematode Growth And Morphology In Vitro, Ammon Perkes, Byron Adams

Journal of Undergraduate Research

The Growth Rate Hypothesis (GRH) proposes that since high-growth protein synthesis in organisms requires phosphorous-rich rRNA, growth is correlated with and dependent on phosphorous availability to said organisms. The limitation imposed by phosphorus availability thus becomes a selective factor that drives evolution. (Elser et al, 2002). This project seeks to test the GRH in vitro using Plectus murrayi a species of Antarctic nematodes. Previous research in the McMurdo Dry Valleys in Antarctica found a correlation between life history in P. murrayi, including growth, and phosphorous availability. (Adhikari et al, in prep). We seek to replicate this difference in vitro …

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Testing The Validity Of The Lctsr 12-Point Grading System, Ted Poirczynski, Jamie Jensen May 2015

Testing The Validity Of The Lctsr 12-Point Grading System, Ted Poirczynski, Jamie Jensen

Journal of Undergraduate Research

The Lawson Classroom Test of Scientific Reasoning (LCTSR) is a 24-question, multiple-choice test designed to assess students’ scientific reasoning ability. The test consists of 12 scenarios, each of which focuses on testing a specific reasoning pattern. Each scenario is followed by two questions; the first question assesses a student’s ability to apply the specific reasoning pattern being tested, whereas the second asks the student to explain the reasoning behind his or her response to the first question. This dual question approach is designed to verify that students are employing the correct reasoning patterns to reach the correct answers.

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Histone Modifications And Their Effects On Nucleosome Positioning And Gene Expression, Jordon Ritchie, Steven Johnson May 2015

Histone Modifications And Their Effects On Nucleosome Positioning And Gene Expression, Jordon Ritchie, Steven Johnson

Journal of Undergraduate Research

Nucleosome positioning plays an important role in gene regulation and expression. Nucleosomes consist of DNA-histone interactions that comprise the first order of DNA compaction into chromatin in the cell. Modifications to the histone in the nucleosome have been hypothesized to influence the location of the nucleosome on the DNA and therefore the regulation of the gene the nucleosome is forming on. In our original proposal, we proposed to show the effects that different modifications had on the position of the nucleosome on the DNA and the DNA sequence that had the highest affinity for nucleosome formation given a specific histone …

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Analysis Of The Adjuvant Effect Of Vitamin D3 In Enhancing Mucosal Immune Responses, Cameron Sargent, Dr. Eric Wilson May 2015

Analysis Of The Adjuvant Effect Of Vitamin D3 In Enhancing Mucosal Immune Responses, Cameron Sargent, Dr. Eric Wilson

Journal of Undergraduate Research

Because skin provides an effective physical barrier, most pathogens that invade the body do so at mucosal sites like the nose and mouth. As such, finding methods of improving mucosal immunity is key to providing greater defense against communicable diseases, the cause of approximately one-quarter of all deaths worldwide [1]. Improving vaccination, the technique in which the body is exposed to a weakened or nonvirulent dosage of a pathogen or toxin to promote an immune response specific to that foreign material, is a potential way of enhancing mucosal immunity. Vaccination has been used for several decades in medicine, nearly eradicating …

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Three-Dimensional Modeling Of Facial Nerve Vii, Dani Peterson, Jonathan Wisco May 2015

Three-Dimensional Modeling Of Facial Nerve Vii, Dani Peterson, Jonathan Wisco

Journal of Undergraduate Research

Due to its long and complicated trajectory through the cranium, facial nerve VII (CN VII) (see figure 1) can be damaged in surgeries, sometimes resulting in facial muscle paralysis. Surgical removal of acoustic neuromas and parotid tumors, in addition to surgical repair of the temporomandibular joint disorder are associated with a risk of damage to CN VII. In addition, insertion of auditory implants can damage the nerve, as can improper stimulation to the nerve after the implantation has occurred. This study’s focus was the creation of a three-dimensional (3D) model based off of data from dissection of the nerve in …

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The Role Of Endocannabinoid Receptor Gpr55 On Learning And Memory, Bradley Prince, Jeffery Edwards May 2015

The Role Of Endocannabinoid Receptor Gpr55 On Learning And Memory, Bradley Prince, Jeffery Edwards

Journal of Undergraduate Research

Each year millions of people are affected by Alzheimer’s disease, one of the most common forms of dementia. Extensive research has shown that Alzheimer’s affects the hippocampus, the part of the brain principally responsible for learning and memory. The mechanisms responsible for learning and memory are just beginning to be elucidated, and a more comprehensive knowledge of them will be essential in order to understand the brain under normal situations as well as in neurodegenerative diseases such as Alzheimer’s. Studies in this area have sought to understand the causes and treatments of disease, but so far both the underlying physiology …

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Utilization Of The Tgf-Β Signaling Pathway And Cell-Substrate Interaction In A Novel Anti-Cancer Drug Screen, Nicholas Saguibo, Dr. Marc Hansen May 2015

Utilization Of The Tgf-Β Signaling Pathway And Cell-Substrate Interaction In A Novel Anti-Cancer Drug Screen, Nicholas Saguibo, Dr. Marc Hansen

Journal of Undergraduate Research

The TGF-β signaling pathway has been researched extensively over the past few years, and has been shown to be active in the majority of metastatic tumors. Interestingly, tumors expressing TGF-β activity are positively correlated with poorer prognosis in patients, making it a logical target for cancer therapeutics. Furthermore, research conducted in our lab in recent years has demonstrated that the stiffness of the substrate upon which metastatic cancer cells are adhered plays a significant role in the rate of metastasis. To summarize: the harder the substrate, the higher the rate of metastasis. This same research has also demonstrated that softer, …

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How Yersinia Pseudotuberculosis Biofilm Formation Is Regulated By Global Regulator Csra, Jeffrey Schachterle, David Erickson May 2015

How Yersinia Pseudotuberculosis Biofilm Formation Is Regulated By Global Regulator Csra, Jeffrey Schachterle, David Erickson

Journal of Undergraduate Research

The bacteria Yersinia pestis is the causative agent of bubonic plague, and its ability to form biofilm in fleas is essential for plague transmission by fleas [1]. Y. pestis recently evolved from Y. pseudotuberculosis (Y. pstb), and the two have nearly identical genomes. Y. pestis forms a biofilm in fleas that is capable of blocking the flea’s feeding. These biofilms are made up of a community of bacteria adhering to a polysaccharide matrix that is made by the hmsHFRS gene products. Y. pstb is capable of infecting fleas, but will not block the flea’s feeding [1]. Since the …

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Paleopathologies Of A Nabataean Burial Site, Mariana L. F. Castroand, Dr. David Johnson May 2015

Paleopathologies Of A Nabataean Burial Site, Mariana L. F. Castroand, Dr. David Johnson

Journal of Undergraduate Research

The purpose of this project was to examine the paleopathologies of Nabataean burial remains, with emphasis on the osteological evidences for diet, sex and age. The main goal of Archaeology is to uncover the past. However, this cannot be done if scholars and students do not engage in the process of excavation, analysis and consequent publication of the results. This project was important insofar that it put forward a better understanding of Nabataean burial practices and their treatment of the dead. This study can also help us better understand human limitations and past socio-cultural dilemmas, including gender related issues, political …

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Firefly Evolution And Signaling Systems, Michael Swindle, Michael Whiting May 2015

Firefly Evolution And Signaling Systems, Michael Swindle, Michael Whiting

Journal of Undergraduate Research

The goal of this project was to expand and clarify the relationships between the various subfamilies of fireflies. Lampyridae (the scientific name for fireflies) is a family within the beetle order, Coleoptera, and include about 2000 species across the world. Lampyridae is currently recognized as having nine separate subfamilies, but the relationships between these groups are unclear. This project was meant to determine clear relationsips between these groups and further determine the location of key species, such as Pterotus obscuripennis, whose phylogenetic position has remained uncertain after many attempts to place it firmly within a specific subfamily. However, this …

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The Countering Effects Of Exercise On Stress Reduced Long-Term Potentiation In Mouse Hippocampi, Jacob Trotter, Dr. Jerffrey Edwards May 2015

The Countering Effects Of Exercise On Stress Reduced Long-Term Potentiation In Mouse Hippocampi, Jacob Trotter, Dr. Jerffrey Edwards

Journal of Undergraduate Research

The hippocampus is an area of the brain that mediates learning and memory by changing the properties of synapses between its neurons. This ability of synapses to change is known as synaptic plasticity. Long-term potentiation (LTP), a long-lasting increase in signal transmission between two neurons, is one of several phenomena underlying synaptic plasticity and is the cellular correlate of memory and learning. Several studies of LTP in mice show that there is a marked impairment of LTP in hippocampal slices taken from rodents exposed to stress. Their data suggests that stress may lead to deficits in learning and memory. In …

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The Effects Of Stress And Exercise On Learning And Memory, Teresa Nufer (St. Pierre), Jeffery G. Edwards May 2015

The Effects Of Stress And Exercise On Learning And Memory, Teresa Nufer (St. Pierre), Jeffery G. Edwards

Journal of Undergraduate Research

Both stress and exercise have significant physiological effects. Researchers have studied these effects throughout the body, and current evidence suggests that exercise and stress also have profound effects on the brain. While stress decreases brain function, exercise has been show to enhance brain function. Recently, researchers have begun to investigate the effects of stress and exercise on the brain simultaneously, instead of studying the effects individually. Our lab has furthered these studies through the use of electrophysiology and behavioral experiments. Four groups of mice were studied: a control group, a group that experienced a chronic stress protocol, a group that …

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Genetic Basis For Rheumatic Heart Disease In High Risk Families In Western Samoa, Eleni Tukuafu, John S.K. Kauwe May 2015

Genetic Basis For Rheumatic Heart Disease In High Risk Families In Western Samoa, Eleni Tukuafu, John S.K. Kauwe

Journal of Undergraduate Research

Rheumatic heart disease (RHD) is the most common form of acquired cardiovascular disease among children worldwide and results in 233,000 deaths annually. Although genetic and environmental factors are known to contribute to RHD, not much is known about genes that increase susceptibility. RHD results from untreated rheumatic fever (RF). RF develops when a Streptococcus pyogenes infection, such as streptococcal pharyngitis, goes untreated. About 34% of children with an untreated Streptococcus pyogenes infection develop rheumatic fever. Only 1/3 of those children acquire RHD1. This suggests that there is a genetic basis for why some children are prone to the …

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A Method Of Introducing Site Specific Mutations Into The Phor Gene Of The E. Coli Chromosome, Cameron Woodward, William Mccleary May 2015

A Method Of Introducing Site Specific Mutations Into The Phor Gene Of The E. Coli Chromosome, Cameron Woodward, William Mccleary

Journal of Undergraduate Research

Phosphate intake by Escherichia coli serves as a good model system to study phosphate intake by other bacteria. The pho phosphate uptake system used by E. coli is well conserved in pathogens like Vibrio cholerae (1). To better understand this important mode of phosphate uptake a study was performed to examine the interactions between the phoR and phoU proteins of this system. PhoU interacts with the pstSCAB complex, which brings phosphate into the cell. After communicating with pstSCAB the phoU protein interacts with phoR to tell it if phosphate is present in the environment or not. PhoR has been shown …

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Characterizing Dna2 In Model Plant Arabidopsis, Connor Woodward, Brent Nielsen May 2015

Characterizing Dna2 In Model Plant Arabidopsis, Connor Woodward, Brent Nielsen

Journal of Undergraduate Research

Dna2 is a protein that is known to be essential for DNA replication in human and yeast mitochondria. In these organisms it acts as both a helicase and an endonuclease. In the model plant Arabidopsis thaliana an ortholog of Dna2 exists but has never been studied. Two questions were answered in this study. The first question is “What would happen to A. thaliana plants that lacked Dna2?”. The second is “Where is Dna2 localized in plant cells?”

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Histone Deacetylase 6 (Hdac6) Promotes The Pro-Survival Activity Of 14-3-3Ζ Via Deacetylation Of Lysines Within The 14-3-3Ζ Binding Pocket, Jeffrey B. Mortenson, Lisa N. Heppler, Courtney J. Banks, Vajira K. Weerasekara, Matthew D. Whited, Stephen R. Piccolo, William E. Johnson, J. Will Thompson, Joshua L. Andersen May 2015

Histone Deacetylase 6 (Hdac6) Promotes The Pro-Survival Activity Of 14-3-3Ζ Via Deacetylation Of Lysines Within The 14-3-3Ζ Binding Pocket, Jeffrey B. Mortenson, Lisa N. Heppler, Courtney J. Banks, Vajira K. Weerasekara, Matthew D. Whited, Stephen R. Piccolo, William E. Johnson, J. Will Thompson, Joshua L. Andersen

Faculty Publications

The phospho-binding protein 14-3-3ζ acts as a signaling hub controlling a network of interacting partners and oncogenic pathways. We show here that lysines within the 14-3-3ζ binding pocket and protein-protein interface can be modified by acetylation. The positive charge on two of these lysines, Lys49 and Lys120, is critical for coordinating 14-3-3ζ-phosphoprotein interactions. Through screening, we identified HDAC6 as the Lys49/Lys120 deacetylase. Inhibition of HDAC6 blocks 14-3-3ζ interactions with two well described interacting partners, Bad and AS160, which triggers their dephosphorylation at Ser112 and Thr642, respectively. Expression of an acetylation-refractory K49R/K120R mutant of 14-3-3ζ rescues both the HDAC6 inhibitor-induced loss …

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The Angel In The Theatre: Ellen Terry And Olga Nethersole As Liminal Victorian Performers, Anna Kristine Daines Rennaker May 2015

The Angel In The Theatre: Ellen Terry And Olga Nethersole As Liminal Victorian Performers, Anna Kristine Daines Rennaker

Theses and Dissertations

The late nineteenth century British stage was hopelessly confused. It couldn’t decide whether it was London’s principle source of entertainment—mainstream and respectable enoughfor Queen Victoria herself to patronize—or the seedbed of all corruption and deviance in Victorian society. At the center of this split identity was the actress, a figure both well-beloved (in the case of stars like Ellen Terry) and the literal embodiment of everything a Victorian women shouldn’t be—loose, sexualized, and working (in the case of her contemporary, Olga Nethersole). Because of this liminal position, Victorian actresses thus create a fascinatingmicrocosm in which to study the implications of …

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Polyethylene Glycol Diacrylate (Pegda) Resin Development For 3d-Printed Microfluidic Devices, Kamran Qaderi May 2015

Polyethylene Glycol Diacrylate (Pegda) Resin Development For 3d-Printed Microfluidic Devices, Kamran Qaderi

Theses and Dissertations

In this thesis, the successful fabrication of 3D-printed microfluidic devices will be discussed. Fabrication is performed with a low-cost commercially available stereolithographic 3D printer utilizing a custom PEGDA resin formulation tailored for low non-specific protein adsorption based on my colleagues' work [Rogers et al., Anal. Chem. 83, 6418 (2011)]. Horizontal microfluidic channels with designed rectangular cross sectional dimensions as small as 300 um wide and 150 um tall are printed with 100% yield, as are cylindrical vertical microfluidic channels with 300 um designed (334 um actual) diameters. Moreover, two different resins developed by our group are utilized in the process …

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Ligament Model Fidelity In Finite Element Analysis Of The Human Lumbar Spine, Mitchell Scott Hortin May 2015

Ligament Model Fidelity In Finite Element Analysis Of The Human Lumbar Spine, Mitchell Scott Hortin

Theses and Dissertations

The purpose of this project is to quantify the effects of increasing spinal ligament fidelity on the mechanics of the human lumbar spine using finite element analysis (FEA). In support of this goal, a material characterization study was completed to provide anisotropic, nonlinear material parameters for the human anterior longitudinal ligament. (ALL). Cadaveric samples of the human ALL were tested using a punch test technique. Multi- axial force-deformation data were gathered and fit to a commonly used transversely isotropic material model using an FEA system identification routine. The resulting material parameters produced a curve that correlated well with the experimental …

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The Effectiveness Of Alternative Dissertation Models In Graduate Education, Rebecca Arlene Thomas May 2015

The Effectiveness Of Alternative Dissertation Models In Graduate Education, Rebecca Arlene Thomas

Theses and Dissertations

Historically, the doctoral dissertation has had two purposes: to train young scholars in proper research methodology, and to contribute original findings to research. However, some feel that the traditional dissertation format falls short of these goals for two reasons. First, the majority of dissertations never get published in academic journals, and dissertations are unlikely to get cited in academic articles. Second, many students in doctoral programs see little authenticity in traditional dissertations because the writing style and process differ from that of academic articles. In response to these concerns, many Instructional Technology programs have implemented alternative dissertation formats. This study …

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Online Mormon Self-Presentation: Content Analysis Of Mormon.Org And Ldssingles.Com Profiles, Megan Marie Fereday May 2015

Online Mormon Self-Presentation: Content Analysis Of Mormon.Org And Ldssingles.Com Profiles, Megan Marie Fereday

Theses and Dissertations

This study aimed to examine online Mormon self-presentation, specifically in the context of Mormon.org and LDSSingles.com (LDSSO). To examine the different styles of self-presentation used in Mormon.org and LDSSO profiles, this study drew upon self-presentation theory (Goffman, 1959; Jones, 1990; Jones & Pittman, 1982) and analyzed profiles according to Dominick's (1990) definitions of Jones and Pittman's (1982) five self-presentation strategies. In addition, this study examined the relationship between a profile poster's sex and the self-presentation strategies exhibited in his or her Mormon.org or LDSSO profile. Content analysis of 100 (50 male and 50 female) Mormon.org and 100 (50 male and …

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