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The KnowledgeBank at OSU (74.956 recursos)

Knowledge Bank contains collections of presentations, publications and reports related to Ohio State University.

18th Denman Undergraduate Research Forum (2013)

Mostrando recursos 1 - 18 de 18

  1. Evaluation of Off-Flavor Development in Alpine Cheese Using Selected Ion Flow Tube Mass Spectrometry (SIFT-MS)

    Berusch, Elana; Taylor, Kaitlyn; Harper, William James
    A manufacturer of Alpine cheese has found that within three weeks of removing their product from vacuum packaging, off-flavors start to develop in the cheese. It was speculated that the development of these off-flavors was caused by lipid oxidation. The objective of this study was twofold: determine if the flavor change is, in fact, caused by lipid oxidation, and if it is not, find the agent causing the flavor profile to change. Both goals were met by using selected ion flow tube-mass spectrometry (SIFT-MS) to evaluate two different lots of Alpine cheese, #153 and #160. SIFT-MS is a direct mass...

  2. An Investigation into the Link Between Heart Rate Variability and Intrusive Thoughts: Implications for Cancer Survivors

    Hussain, Mariam A.; Kiecolt-Glaser, Janice K.; Jaremka, Lisa M.; Fagundes, Christopher P.
    Cancer survivors often suffer from long-term health problems like cardiac dysfunction, chronic stress, fatigue, and depression. One common underlying factor for these problems is low heart-rate variability (HRV), exhibiting less variation in the time interval between heartbeats, which is also linked to all-cause mortality. Research has found that stress in the form of persistent, negative thoughts is also linked to poor health and thought to have a direct, harmful impact on somatic disease; however, only a handful of studies investigating this theory have been conducted in cancer populations. Our study examined the relationship between HRV and intrusive thoughts among cancer...

  3. Benchmarking Polarizable Continuum Models For Macromolecular Analysis

    Albrecht, Benjamin
    In quantum chemistry, molecular characteristics, such as energy, vibrational frequency, and geometry, are predicted and modeled using computational chemistry software. In computing these characteristics, calculations can become cumbersome for increasing orders of accuracy or system size. Thus affordability of calculation times has become the largest constraint in quantum chemistry. With no all-encompassing optimal computational method for calculating molecular characteristics, methods have to be chosen depending on the molecular property of interest, the environment of the species, and the desired accuracy of the result. Here, the ability of various state of the art implicit solvent models, known as polarizable continuum models...

  4. Design of a Solar Thermoelectric Generator (STEG)

    Watzman, Sarah
    In a world where fossil fuels dominate as energy sources, the need for an economically and commercially viable renewable energy source is dire. The processes through which fossil fuels are formed do not occur fast enough to replenish their sources to meet society's demands, and combustion of fossil fuels produces carbon dioxide, a greenhouse gas linked to global warming. Solar energy has proven itself to be a promising alternative, with the field dominated by photovoltaics on the consumer-scale and solar thermal power on the plant-scale. Yet solar thermal systems have an innate advantage in their use of all wavelengths of...

  5. Study on the Eccentricity Distribution of the Initial Condition for Uranium-Uranium Collisions

    Goldschmidt, Andy
    A few microseconds after the Big Bang that created our universe, all matter existed in a flowing fireball known as the Quark-Gluon Plasma (QGP). During the last decade, physicists figured out how to create QGP in the laboratory. The Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Lab accelerates large atomic nuclei to near light-speed before colliding them with each other. The results are little fireballs that subsequently explode like miniature versions of the Big Bang. We call these Little Bangs. My research aims at a better understanding of the quantum fluctuations in the initial state of the Little Bang and...

  6. Intra-Communal Violence in Southwest Russia and the Government's Reaction to Extremism

    Marzalik, Peter
    On July 19, 2012, head mufti Ildus Faizov was nearly assassinated and his deputy Valiulla Yakupov was murdered by a radical Islamic sect in the city of Kazan in Tatarstan, Russia. This unprecedented terrorist attack was motivated by the extremists’ outrage for their leaders’ moderate prescriptions on Islamic fundamentalism. Such deadly intra-communal violence triggered a strong military response from the Russian government. In line with Putin-era security policies, the Federal Security Service (FSB) continues to actively pursue extremists in the conflicts of the North Caucasus. However, initial inquiries suggest the dissatisfaction of ethnic minorities with federal mandates extends beyond this...

  7. Development of Surgical Navigation Device for Arthroscopic Cartilage Repair

    Vignos, Michael
    Damage to articular cartilage, in the form of a cartilage defect, is very painful and is a precursor for osteoarthritis. Due its avascular nature, this tissue is unable to repair itself causing surgery to be the main option for treatment. Current surgical algorithms use defect area as the primary attribute to determine which procedure to use for each patient. Unfortunately, current techniques of calculating defect area are very poor, with errors ranging from -78.81% to 236.61% for surgeon area estimation, the current gold standard. Brockmeier (2009) previously developed a cartilage navigation system to improve surgeon accuracy in calculating defect area....

  8. Cognitive Vulnerability and International Student Stress: A Test of the Diathesis-Stress Model of Depression in International Students in Spain

    Kretz, Shelby
    International students face unique life stressors that put them at an increased risk for exhibiting depressive symptoms while they are in college. Due to a changing economy, Spain has seen a large recent increase in international students. Along with stress, cognitive style (i.e., the way a person thinks about the world) has been established as a risk factor for the development of depressive symptoms. In line with diathesis stress models of depression, the purpose of this study was to examine international student stress, cognitive style, and the interaction of these risk factors as predictors of depressive symptoms in international students...

  9. Paleolithic Diet is Associated With Unfavorable Changes to Blood Lipids in Healthy Subjects

    Trexler, Eric
    Background: The Paleolithic (Paleo) diet is one modeled after the perceived food consumption of early human ancestors of the Paleolithic Era, consisting of mainly meat, fish, fruit, vegetables, eggs, and nuts. The purpose of this study was to examine the effects of a Paleo diet on blood lipids, including high-density lipoprotein (HDL), low-density lipoprotein (LDL), non-HDL cholesterol, triglycerides (TG), total cholesterol (TC), and the ratio between TC and HDL (TC/HDL) in a healthy population. Methods: Subjects of both genders (23 males, 20 females) with no history of diabetes, heart disease, dyslipidemia, or other metabolic disease were asked to eat an...

  10. Patient Handoffs: Study of Residents, Nurse Practitioners, and Registered Nurses

    Butz, Alexandra
    
Communication breakdowns during resident physician sign-outs in hospitals are a known contributor to patient harm. In one survey study, 59% of resident physicians reported harm to at least one of their patients due to a problematic patient handoff during their last rotation. In response to these issues, the Accreditation Council for Graduate Medical Education (ACGME) instituted Common Program Requirements to ensure that resident physicians are competent in communicating during handoffs, defined as the process of transferring primary authority and responsibility for providing clinical care to a patient from one departing provider to one oncoming provider. To date, there is no...

  11. Campaign Finance in the United States, the United Kingdom, and Canada

    Shoub, Kelsey
    To survive, parties and politicians need a variety of resources to carry out their various functions of administration, voter persuasion, and getting out the vote. A key resource is money. Due to its ability to be transformed into other resources and its growing importance, political finance—specifically campaign finance—has generated a spirited debate within and among democracies. The existent body of literature on campaign finance describes differences between systems, the influence money has on elections and/or governance, and its impact on corruption levels within countries. I propose to add to the existent body of literature on campaign finance by addressing a...

  12. A Preliminary Comparison of Subsistence Practices at Two Fort Ancient Villages

    French, Melissa
    A key issue in Anthropology is the interplay between the environment and culture as they affect human behavior. An effective way to judge the relative extent of these influences is to examine the subsistence strategies employed at two sites that are part of the same culture but which are located in different ecological zones. This project focuses on two Fort Ancient villages known as Taylor and Guard. The Fort Ancient Culture is a pre-Columbian (ca. A.D. 1000-1650) way of life that included established homes, developed agriculture, stored food, and intertribal trade with sites located throughout the Ohio Valley. These two...

  13. Developing Methodology to Prepare a Nanoparticle Coated Crystal for Infrared Analyses

    Ayres, Craig; Noerpel, Matt
    The widespread use of nanomaterials demonstrates a tremendous benefit to society; however, as nanomaterials are inevitably introduced to the environment, it is unknown how their compositions and coating agents alter in different settings and over a prolonged period of time. Coating agents are applied either during or post synthesis to prevent aggregation. Tracking changes to the molecules that coat the surface of nanomaterials is imperative to understanding the inherent risk when nanomaterials are released to the environment. The purpose of my research is to develop a method to prepare a nanoparticle coated crystal for infrared (IR) analyses in order to...

  14. Real-Time Hardware Implementation of Telephone Speech Enhancement Algorithm

    Forrest, Obnamia
    Hearing impairment detrimentally affects communication over the telephone. Since phone lines reduce bandwidth and dynamic range, the poor quality speech signal can cause hard of hearing (HoH) listeners to experience extreme frustration and inefficient communication. One possible solution has been developed at the Ohio State University to help combat this problem. The Telephone Speech Enhancement Algorithm (TSEA) has been created to improve telephone signals so that speech is more intelligible for HoH listeners. Tests for TSEA have been run on human subjects and proven the algorithm effective. However, a hardware implementation of TSEA has yet to be designed. In this...

  15. Energy and Feasibility Analysis of Gasoline Engine Start/Stop Technology

    DeBruin, Luke
    The national mandate set forth by the Environmental Protection Agency to increase fuel efficiency and reduce greenhouse gas emissions by 5% each year for all new model mid-size cars, medium-duty cars, and light-duty trucks is pushing automobile makers to convert their fleets to hybrid-electric and micro-hybrid vehicles. Implementing automated start/stop technology in a passenger vehicle is a cost effective way to improve fuel economy and reduce emissions without affecting consumer acceptance. In urban areas, where much of the vehicle driving time is spent idling at stop lights or in traffic, the engine can be shut down when the vehicle is...

  16. Complex Behavior from a Simple Rule: Demonstration with Lego Mindstorms NXT Kit

    Yang, Ruochen
    The project covers the successful implementation of two robots, built using Lego Mindstorms, that demonstrate how complex animal behaviors can be replicated using a simple algorithm to replicate a two neuron nervous system. The process of cognition and decision making inside the mammalian brain occurs subtly but near instantaneously and in a way that makes it hard to replicate synthetically. However, the understanding of its behavior is valuable in multiple disciplines and it may be applied to future technologies. In order to explore some behavior that relates to sensing and cognition, the Lego Mindstorms NXT robot kit has been used....

  17. Words Interlacing Works: An Investigation of Collaborative Interdisciplinary Endeavors

    Switlick, Rachel
    Over the course of my undergraduate experience at The Ohio State University, I have become increasingly interested in investigating the depth of human expression and relation found within art forms. My dual studies in English and Dance as well as my extracurricular activities have exposed me to many contrasting viewpoints and approaches to artistic endeavors. It is my belief that the wide range of ways we express ourselves in various cultures and disciplines are more interrelated than may be apparent at first glance. However, it has been my experience that often the segregating terminologies (i.e. professional jargon) that align with...

  18. Effect of Early Weight-Bearing Training on Blood-Spinal Cord Barrier Function in Mice

    Black, Nicholas
    Spinal cord injury (SCI) results in a breakdown of the blood-spinal cord barrier (BSCB) that permits a robust inflammatory response. Mechanisms responsible for inflammation promote further damage to the neural tissue. Neurotoxicity results from inflammatory cells moving into the spinal cord through the damaged and permeable blood vessels. Activities such as treadmill training attempt to utilize spinal plasticity to promote recovery, but recent animal studies have shown increased BSCB permeability with early swim training [1]. Exercise-regulated gelatinase matrix metalloproteinase-9 (MMP-9) is a regulator of vascular permeability utilized to degrade tight-junctions of the blood vessel wall, allowing extravasation into surrounding tissues....

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