Digital Commons Network^™

Cure From The Cave: Volcanic Cave Actinomycetes And Their Potential In Drug Discovery, Naowarat (Ann) Cheeptham Dr., Tara Sadoway, Devon Rule, Kent Watson, Paul Moote, Laiel C. Soliman, Nicholas Azad, Kingsley Donkor, Derrick Horne

International Journal of Speleology

Volcanic caves have been little studied for their potential as sources of novel microbial species and bioactive compounds with new scaffolds. We present the first study of volcanic cave microbiology from Canada and suggest that this habitat has great potential for the isolation of novel bioactive substances. Sample locations were plot ted on a contour map that was compiled in ArcView 3.2. Over 400 bacterial isolates were obtained from the Helmcken Falls cave in Wells Gray Provincial Park, British Columbia. From our preliminary screen, of 400 isolates tested, 1% showed activity against extended spectrum ß-lactamase E. coli, 1.75% against Escherichia …

The Effects Of Uv Light On The Antimicrobial Activities Of Cave Actinomycetes, Devon Rule, Naowarat Cheeptham

International Journal of Speleology

The goal of this study was to determine whether actinomycetes isolated from a volcanic cave in western Canada could produce novel antimicrobial compounds against six multidrugresistant pathogens when exposed to UV light. One hundred and seventy-six actinomycete strains isolated from Helmcken Falls Cave, Wells Gray Provincial Park, BC, were screened against six pathogens using the “plug assay” in UV light and no light conditions. Of the 176 strains tested, 100 or 57% of the cave actinomycete strains had antimicrobial activities against the pathogens in 124 different instances: 35 instances when exposed to UV and no light, 30 when exposed to …

Effects Of Material Variables And Process Parameters On Properties Of Investment Casting Shells, Priyatham Tumurugoti

Masters Theses

"Manufacture of investment casting shells is a complex process. The choice of raw materials - refractory powders or grains, binders and additives - affects the properties of investment casting shells. In this study, different systems of shells were prepared, according to a design of experiments, with commercially available raw materials that differ in chemistry, particle size or particle size distribution. Shell strength was measured in green, fired and cooled, and hot conditions and the results were analyzed for strength-material property relation. Various microstructures of polished cross sections of these shells were characterized using scanning electron microscope. It was determined that …

Evaluating The Effects Of Increasing Mathematics Graduation Requirements: A Survey Of The Effects Of State Policy Change In Illinois, Corey Tafoya

Dissertations and Theses @ UNI

In the summer of 2005, Illinois lawmakers made the decision to elevate the graduation standards for students, joining an increasing number of states who decided current requirements in their state were insufficient. This legislation affected aspects of English, science, and mathematics. The most significant change resulted in the increase of mathematics study from two years of mandatory study to three years in order to graduate. Any district that did not already require students to take three years had to decide how to react to this new requirement. This quantitative research study was designed to examine what effects this change had …

Teachers' Perceptions Of Professional Development For The Use Of Interactive White Boards In Turkey, Erkan Taskin

Dissertations and Theses @ UNI

The primary purpose of this study is to investigate Turkish public school teachers’ and principals’ perceptions regarding professional development opportunities and practices that may be available for interactive whiteboard (IWB) use. The study aims at investigating the following questions: (1) What are Turkish teachers’ perceptions of the quantity and quality of IWB training they receive? (2) How does professional development affect teachers’ use of an IWB in a Turkish K-12 classroom? (3) What type of professional development do teachers have before and after the installation of the IWB in their classroom? (4) What differences, if any, are there among teachers …

Nurturing Resiliency Among Adolescents With Emotional And Behavioral Disturbances (Ebd) In A Special Education Setting, Rimaz Herz

Dissertations and Theses @ UNI

Many youth with emotional and behavioral disturbance (EBD) face significant challenges and difficulties with their families, schools, friends and peers, and even themselves, and experience them academically, emotionally, physically, socially and behaviorally. These youth need resilience to help them overcome these difficulties and challenges. This qualitative study focused on understanding the nature of schooling and interventions provided to students identified as having the most severe emotional and behavioral disabilities or needs, and how such schooling and interventions might explicitly or implicitly promote resilience. The researcher sought to examine interventions used by observing a specific self-contained program with clearly defined services. …

A Midwestern Culture Of Civility: Student Activism At The University Of Northern Iowa During The Maucker Years (1967-1970), Christopher J. Shackelford

Dissertations and Theses @ UNI

This project examines the changing social dynamic of those affiliated with the University of Northern Iowa during the latter half of the 1960s, with special emphasis on student activism and the changing attitudes of administrators and community members. This project intends to use the medium of alternative newspapers as a central component in the analysis of the time studied and as an unfiltered voice of student dissent. By narrowing the focus of this project to an individual university and community, an intimate narrative emerges that acts as a testament of the overwhelming atmosphere of change that engulfed American colleges throughout …

Behind The Mask: An Analysis Of Women's Perceptions And Rationale Toward The Purchase And Use Of Anti-Aging Products, Clair Maureen Williams

Dissertations and Theses @ UNI

An exploratory study was done to unveil a more contemporary and intimate look at women and aging in U.S. society. This qualitative research explored what women do, if anything, to confront pressures associated with aging. Purposeful sampling was used to homogenize the participant sample for increased richness of data. Criterion was as follows: women, 50’s age range, married with children, Caucasian, from the Midwest, and who currently use one or more anti‐aging products. In total, 17 women of similar status and background participated in this research. Data collection consisted of in‐depth audio taped interviews followed by immediate transcription. The analysis …

Christians, Lesbians, Gays, And Bisexuals: Examining The Roles Of Uncertainty And Religiosity In Christian Attitudes Toward Lgb Individuals, Megan Deanne Wharff Kavanaugh

Dissertations and Theses @ UNI

This thesis examines heterosexual Christian attitudes toward LGB individuals, specifically to determine if there is a relationship between intergroup contact, uncertainty reduction, and supportive attitudes toward LGB individuals among Christian individuals. Participants completed an online survey, which assessed religious beliefs, levels of uncertainty about interactions with LGB individuals, levels of contact with LGB individuals, and attitudes toward LGB individuals. The goal of the research was to identify the current attitudes of heterosexual Christians and the factors that may influence those attitudes. Findings indicate that participants were unsure, but leaned toward valuing the contributions of LGB individuals in society and believing …

Understanding The Critical Role Of A Wetland In Maintaining The Ecosystem: A Case Study, Sushil Tuladhar

Dissertations and Theses @ UNI

Beaver Valley Wetland in north-east Iowa was studied to determine its functionality in filtering incoming contaminants from the surrounding agricultural fields. The study was conducted from May through November of 2011. Altogether 78 water samples (from 13 sites), 84 soil samples (from 14 sites), and some sediment samples were collected for chemical analysis. Heavy metals in three different soil categories, such as surface, 6” deep, and sediments were found to be at or below the acceptable concentrations, indicating no immediate concern for metal toxicity in the wetland environment. The chemical tracers that were used to study the sub-surface flow regime …

Recalcitrant Arguments, Kiranjeet Kaur Dhillon

Dissertations and Theses @ UNI

On January 26, 2011, Reuters photojournalist Amr Abdallah Dalsh took an image of a unknown veiled woman gesturing at Dalsh and his camera. Using TinEye, a reverse image search engine, I found that 86 circulations and 22 recirculations of the photo were primarily in the United States. US graphic artist Nick Bygon created one of the recirculations, which primarily appeared on US blogs. The photo achieved this level of circulation in the US because it is consistent with, and therefore legible within the symbolic language, of the liberal democratic order. Similar to “Migrant Mother” and “Tank Man”, the photo is …

Mental Illness And Schools: An Examination Of How Schools Are Providing Supports And Services To Students With Mental Health Concerns, Nikki Leigh King

Dissertations and Theses @ UNI

This purpose of this study was to explore the educational experiences of an individual entitled to services through the labels of an intellectual disability and a mental health concern. The study employed qualitative methodologies and methods, through the use of a life/oral history, which allowed the researcher to interview the participant to gain a deeper understanding of the school experiences pertaining to a student with a mental health concern. The study concluded that authentic and individualized supports and services are needed as well as promoting meaningful relationships. Study considerations and future studies are discussed at the end.

Longitudinal Analysis Of Perceived Body Image, Sport Commitment, Burnout, And Athletic Injury, Erik Chaouch

Dissertations and Theses @ UNI

Injury is a risk that all athletes face while participating in sport. How injuries affect athletes perceived body image, sport commitment levels, and burnout levels are not yet fully understood. Athletes are aware of what the media portrays an athlete as, aware of what peers think an athlete should look like, and even have their own pre-conceived notions as to what an athlete’s body should look like. Many athletes perceive their bodies to be appropriate for their sport, yet there is dissatisfaction with their own bodies in the context of what is socially considered to be attractive. A distorted body …

Long-Term, Low-Dose Exposure Of People Residing In Arsenic Affected Areas Of Iowa: A Cross-Sectional Analytical Study, Junu Shrestha

Dissertations and Theses @ UNI

Arsenic contamination in the ground water source is a major problem throughout the world. Epidemiological studies show that long-term arsenic exposure in drinking water, even at low concentrations, can lead to chronic toxicity problems and negative health outcomes. In the United States, private wells are not mandated to comply with the drinking water standards that piped water is, putting many people at risk. This study focused on monitoring of arsenic contamination of private well water, hair samples, and questionnaire based surveys. Of the 260 private well owners selected from 13 counties in Iowa who were invited to participate in the …

From Sidebets To Sideshow: The Influence Of Gambling On The Development Of Professional Wrestling In America, 1870-1911, Lee Casebolt

Dissertations and Theses @ UNI

While boxing and baseball have been common subjects of historical study, other sports of the nineteenth century have been comparatively neglected by historians. Professional wrestling, in particular, has received very little attention as a sport, as opposed to its twentieth century “sports entertainment” incarnation. What attention it has received has most commonly been through the lens of social history, focusing on wrestling as theater or its psychosexual overtones. Missing from its history is any consideration of the economic factors which influence the evolution of any professional endeavor. This paper explores the relationship between a wrestler’s payment and performance. Specifically, it …

From Saeter To Sod: Single Women Homesteaders Of Norwegian Descent Farming Their Land In Dakota Territory, 1862-1929, Sara Marie Skindelien

Dissertations and Theses @ UNI

On May 20, 1862 Congress signed into effect the Homestead Act which provided 160 acres of surveyed government land to any citizen over the age of twenty-one and who was a head of household. One of the most historical aspects of this act was that it allowed single women the opportunity to own land. Not only were native-born women taking advantage of such a lucrative offer, but the women of Norway saw just the opening they needed to venture out on their own. They joined thousands of their countrymen across the Atlantic to find a bit of land where they …

Computational Fluid Dynamics Flow Comparison Between Openhole Sleeve And Plug-And-Perf Completion In A Hydraulic Fractured Horizontal Well, Viriyah Theppornprapakorn

Masters Theses

"Multi-stage hydraulic fracture completions in horizontal wells have facilitated economic development of natural gas from unconventional and tight gas reservoirs.Industry has relied on two horizontal multi-stage completion technologies: cemented and perforated liner or Plug-and-perf method and Openhole Sleeve Multi-stage method. Each method has its own advantages and disadvantages. However, one of the most important questions is which method yields better gas production? Computation fluid dynamics (CFD) is a powerful tool for solving complex fluid flow problems. In well completion design, CFD plays a significant role aiding the completion engineers on making decision on well completion methods. In this study, a …

Fuzzy Logic Color Detection: Blue Areas In Dermoscopy Melanoma Images, Mounika Lingala

Masters Theses

"Malignant melanoma is one of the deadliest forms of skin cancer and is one of the most rapidly increasing cancers in the world. Image analysis techniques for the early detection of melanoma are dependent upon the detection of multiple color shades in melanoma images. Use of magnified visible-light imaging by dermoscopy allows detailed investigation of these color shades. This research explores the fuzzy logic methods for the detection and characterization of blue color shades to discriminate melanoma from benign skin lesions. Standard thresholds are placed on the RGB dermoscopy images firstly and then the restrictiveness is explored by implementing fuzzy …

Distribution And Occurrence Of Escherichia Coli In Water And Sediments At Grand Glaize Beach In Lake Of The Ozarks State Park, Jordan Lee Wilson

Masters Theses

"Public swimming beaches at the Lake of the Ozarks State Park (LOSP) are popular vacationing spots for many Missourians; however, on several occasions Escherichia coli (E. coli) concentrations have exceeded standards set by the Missouri Department of Natural Resources (MDNR). Exceedances lead to beach closures which not only represent a potential public health threat but are also detrimental to the local economy and the public's perception of the lake's general water quality. In a collaborative effort between Missouri S&T, the United States Geological Survey (USGS) and the MDNR, an in-depth, two-summer study was conducted which included collection of …

Factors That Influence Superintendents In Iowa To Implement A One-To-One Computer Initiative, Gerald Eugene Schnabel

Dissertations and Theses @ UNI

The purpose of this study is to identify factors that influence superintendents in Iowa to implement a one-to-one computer initiative. An in-depth, phenomenological based interview method was used. Two interviews were conducted with each of the five superintendents in the study. The superintendent responses were then organized using the Saskatchewan Educational Indicators, which are context, process and outcome indicators. The major questions addressed in the study were: 1. What factors influenced the decision to implement a one-to-one computer initiative? 2. What are the results of implementing a one-to-one computer initiative? 3. What decision-making process do superintendents in Iowa use when …

Identification Of Motivation In Senior Individuals Who Engage In The Adventure Experience Of Ice Climbing, Donald B. Briggs

Dissertations and Theses @ UNI

Research has shown that individuals participate in high adventure activities for a variety of reasons. This study identified motivational factors for seniors, 55 and older, who participate in the high adventure activity of ice climbing. Semi-structured interviews were conducted with eight senior ice climbers who had at least three years of experience, had climbed the Midwest Silos, and were familiar with the researcher. Using a constant-comparative method, primary and secondary themes were identified from the data.

The findings of this study suggest senior ice climbers participate for a variety of reasons with the primary motivators of self-efficacy, social interaction, fun, …

Quasi-Experimental Evaluation Of Undergraduate Learning In A Multidimensional Wellness Course, Kristi Leonard

Dissertations and Theses @ UNI

Introductory wellness courses are common among American institutions of higher education. These courses are typically of a unidimensional approach, focusing on just the physical component of wellness. Some wellness educators would argue that a multidimensional approach is a richer and more valuable learning experience. Furthermore, technology has played a larger role in wellness education, as it is being created, developed, and implemented into the field. Therefore, college wellness educators and curriculum designers need to determine the implications for both online and face-to-face instructional methods in their execution of teaching the holistic concept of wellness to their students.

The purpose of …

Integrative And Holistic Global Higher Education : An Investigation Of Camp Adventure Child And Youth Services As A Model Service Learning Program, Bin Ruan

Dissertations and Theses @ UNI

Camp Adventure™ Child and Youth Services (CACYS) is a distinctive academic program that emphasizes service learning opportunities for students. It focuses on preparing students with necessary knowledge, skills, and competencies to plan and implement the services for children and youth of varying lengths with a focus on different ages and needs. The primary purpose of this study was to investigate the changes of college and/or university students in core competencies from entry to exit in the CACYS using a framework offered by Bok (2006). The core competencies included in this study were communication, critical thinking, character development, citizenship, diversity, global …

Processing Of Continuous Fiber Reinforced Ceramic Composites For Ultra High Temperature Applications Using Organosilicon Polymer Precursors, James Robert Nicholas

Masters Theses

"The current work is on the development of continuous fiber reinforced ceramic materials (CFCCs) for use in ultra high temperature applications. These applications subject materials to extremely high temperatures (> 2000⁰C). Monolithic ceramics are currently being used for these applications, but the tendency to fail catastrophically has driven the need for the next generation of material. Reinforcing with continuous fibers significantly improves the toughness of the monolithic materials; however, this is a manufacturing challenge. The development of commercial, low-viscosity preceramic polymers provides new opportunities to fabricate CFCCs. Preceramic polymers behave as polymers at low temperatures and are transformed into ceramics …

The Effect Of Perturbation On Interface And Intramuscular Temperatures During An Ice Water Immersion, Andrew Dean Jedlicka

Dissertations and Theses @ UNI

Context: It seems that clinicians build ice water immersions differently, with one protocol factor, perturbation, being different. Perturbation may affect cooling efficacy of the immersion. Objective: Compare the cooling efficacy of 3 different ice water perturbation protocols on interface and muscle temperatures during Tx. Design: Crossover trial. Setting: Laboratory. Patients or Other Participants: Sixteen active volunteers in accordance with university IRB. Interventions: During 2 sessions separated by 48 hours both legs were immersed independently in 38 L cylinder coolers filled to the fibular head. Independent variables will be perturbation [Immersion with no perturbation (ImmNP), Immersion with perturbation every 3 min. …

Fluidic Sensor Devices Utilizing Dry Film Resist As Main Structural Materials, Sijia Gong

Masters Theses

"In this thesis, two types of fluidic sensor devices are demonstrated. The first device utilizes a dry film resist (DFR) as the main structural material of fluidic device utilizing the photolithography process. The second one involves a simple, low-cost sensor platform composed of ubiquitous materials such as polymer tubing and metal wires. Both devices are prepared to measure the dissolved oxygen content, as a model target analyte, based on the oxygen quenching reaction of a ruthenium complex fluorophore as the reporting agent. Characterization of sensors is conducted based on the fluorescence lifetime measurement. The first type of sensor is constructed …