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Are Delay Discounting, Probability Discounting, Time Perception, And Time Perspective Related? A Cross-Cultural Study Among Latino And White American Students, Ana Amelia L. Baumann Neves

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The present study aimed to evaluate (a) the extent to which different impulsivity measures would be related to each other and to a risk taking measure, (b) the extent to which impulsivity, risk taking, time perception and time perspective are related to each other, and (c) the extent to which these processes differ in Latino and White American students. Experiment I was conducted at Utah State University. One hundred and forty-three participants were exposed to the delay discounting, probability discounting and temporal bisection procedures, and answered the Barratt Impulsiveness Scale (BIS-11) and the Zimbardo Time Perspective Inventory (ZTPI). Results showed …

Teaching Creativity In Technical Communication Curricula, Curtis Robert Newbold

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis addresses the need to claim creativity as an essential component to our technical communication curricula as we prepare students for what their managers want. While many technical communication programs at universities across the country have recognized a need to teach skills beyond "writing technically," few, if any, have addressed or "claimed" a concept such as creativity that helps build these skills. I argue that creativity is what managers are looking for and what technical communication programs are already implementing. Claiming this concept will help us further define a discipline that is becoming much richer and help students develop …

The Impact Of Religious Schema On Critical Thinking Skills, Matthew Kirby

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to examine the relationship between critical thinking and religious schema as represented by religious orientation. Past research has included religious belief within the larger construct of paranormal belief, and demonstrated a correlation between high levels of paranormal belief and poor critical thinking skills. Studies in the psychology of religion suggested that a more complex religious measure based on religious orientation was necessary to understand these correlations. Additionally, schema theory offered a cognitive framework within which to experimentally test the cause of these correlations. This study found that primed religious schema did not account for …

Adolescent Religiosity, Religious Affiliation, And Premarital Predictors Of Marital Quality And Stability, Stacey Macarthur

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The influence of religiosity in adolescence on several variables that have been shown to be predictors of marital quality and stability was examined using a nationally representative sample of 3,151 youth, aged 13 to 17 years, from the National Study of Youth and Religion (NSYR). Religiosity was defined to incorporate multiple characteristics including religious beliefs, attitudes, participation, experiences, and identities. The effect of religious affiliation and religiosity was also examined for seven premarital predictors, which included relationship with parents, ideal age for marriage, right and wrong, academic achievement, sexual behavior, attitude toward cohabitation, and attitude toward divorce. Data were collected …

Ethylene Synthesis And Sensitivity In Crop Plants, Joseph F. Romagnano

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The gaseous plant hormone ethylene is a small molecule that regulates developmental change. Research was conducted in three areas: sensitivity, synthesis, and alterations to synthesis. Vegetative pea plants were more sensitive than radish plants to atmospheric ethylene. Light intensity did not affect ethylene sensitivity. Ethylene synthesis rates were measured for unstressed cotton, corn, soybean, and tomato plants. The per-plant ethylene synthesis rate ranged from 0.1-80 pmol plant^-1 s^-1. However, when normalized to net photosynthetic rate, this range was 1-4 µmol of ethylene synthesis per mol of CO₂ uptake. Diurnal cycles in ethylene synthesis were present in …

Principals' Perspectives On Adolescent Literacy Implementation And Support In Secondary Schools: Views Through A Sociocultural Lens, Jack A. Robinson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In this study, interview data were analyzed to illustrate the perspectives of five secondary school principals in adolescent literacy implementation and support. These principals fell on the continuum from beginning practitioners in adolescent literacy to “seasoned veterans.” They were selected based on the recommendations of their district’s assistant superintendents and/or curriculum directors. I interviewed two high school principals, two middle school principals, and one junior high school principal.

Much emphasis has been placed over the last several decades on improving the reading skills of elementary school children, especially in the primary grades. While this goal continues to be an important …

Rereading And Rewriting Women's History, Jacqueline Harris

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In Margaret Atwood’s nonfiction book Negotiating with the Dead: A Writer on Writing (2002), Atwood discusses the importance of the female writer’s responsibility, that to write as a woman or about women means that you take upon yourself the responsibility of writing as a form of negotiation with our female dead and with what these dead took with them—the truth about who they were. By rereading and rewriting our communal past, women writers pay tribute to our female ancestors by voicing their silent stories while also changing gender stereotypes, complicating who these women were, and acknowledging their accomplishments.

In her …

Measuring And Modeling Of Plant Root Uptake Of Organic Chemicals, Erik Dettenmaier

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Determining the root uptake of xenobiotic organic chemicals into plants is critical for assessing the human and ecological health risks associated with the consumption of plants growing in contaminated environments. Root uptake of xenobiotic organics occurs passively in conjunction with transpiration and the transport from root to shoot is ultimately controlled by passage through one or more lipid root membranes. The transpiration stream concentration factor (TSCF), the ratio between the concentration of a chemical in the xylem to that in the solution used by the roots, is used to describe the relative ability of an organic chemical to be passively …

Growing Wild: Crested Wheatgrass And The Landscape Of Belonging, Lafe Gerald Conner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Crested wheatgrass arrived in North America at the turn of the twentieth century through the foreign plant exploration missions sponsored by the United States Department of Agriculture. During the first two decades of the new century, scientists tested the grass at agricultural experiment stations. They determined it was useful for grazing and particularly valuable because it could grow in drought conditions with little or no care and would continue to produce high quality feed even after several years of heavy use. Beginning in the 1930s federally sponsored land utilization and agricultural adjustment programs sponsored the use of crested wheatgrass for …

Measurement Of Fine Spatial Scale Ecohydrologic Gradients In A Pinyon-Juniper Ecosystem, Matthew David Madsen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

With the dramatic expansion of pinyon-juniper woodlands over the last century, improved understanding of how these woodlands modify infiltration properties is needed, in order for land managers to make informed decisions on how to best manage their specific resources. However, current methods for measuring soil infiltration are often limited by low sample sizes and high experimental error, due to constraints associated with remote, non agricultural settings. This thesis first presents a scheme for automating and calibrating two commercially available infiltrometers, which allows collection of a large number of precise unsaturated infiltration measurements in a relatively short period of time. Secondly, …

Demographic Factors That Predict Breastfeeding In The Early Postpartum Period In Utah Women, Amyanne Wuthrich-Reggio

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Breastfeeding is considered to be the optimal choice of infant feeding methods, yet the rates of breastfeeding are consistently lower than national recommendations despite efforts to reverse this trend. Designing effective interventions to increase breastfeeding requires a thorough understanding of the women who choose to breastfeed their infants as well as those who do not choose this infant feeding method. In order to determine which demographic factors predicted breastfeeding in the early postpartum period in Utah women, 600 "intercept interviews" were conducted in the spring and early summer of 2007. Women included in the study were 18 years or older …

Utah Off-Highway Vehicle Owners' Specialization And Its Relationship To Environmental Attitudes And Motivations, Jordan W. Smith

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Off-Highway Vehicle (OHV) use has grown enormously on Utah’s public lands and is one of the most contentious and difficult issues for federal, state, and local land management agencies to address and provide for. Despite OHV use’s meteoric rise in popularity and its ongoing public conflicts, little is known about OHV recreationists. This thesis develops a typology that identifies within-activity differences related to recreation specialization; it also determines differences in OHV owners’ environmental attitudes and motivations. Findings show Utah’s owners comprise a range of use along the recreation specialization continuum. Results also indicate that an OHV owners’ specialization level is …

Dechlorinating And Iron Reducing Bacteria Distribution In A Trichloroethene Contaminated Aquifer, Carmen Lourdes Yupanqui Zaa

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Operable Unit 5 (OU 5) area of Hill Air Force Base currently has two trichloroethene-contaminated groundwater plumes underneath residential areas in Sunset and Clinton, Utah. Bioremediation by biological reductive dechlorination can be an important mechanism for the removal of chlorinated compounds from the plumes. The presence of suitable bacteria to carry on reductive dechlorination is the key in the bioremediation process. The goal of this study was to determine the distribution and population density of the 16S rRNA genes of Bacteria, Dehalococcoides ethenogenes, Desulfuromonas michiganensis, Geobacter spp and Rhodoferax ferrireducens-like bacteria, as well as the functional genes trichloroethene reductive …

Online Education For Nontraditional Adult Students: Perceptions And Attitudes Of Emergency Services Workers In Asynchronous Learning Environments, R. Jeffery Maxfield

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The goal of this research was to better understand the lived experiences and perceptions of nontraditional, adult college students in an asynchronous online environment. Contemporary researchers have investigated the differences between online education and the traditional, in-class learning. Most of the work has been done in quantitative methodologies, focusing on the similarities and differences in cognitive achievement. The extant literature is replete with studies and positions claiming little or no difference between the two delivery methods. However, most research is not presented in a theoretical construct; therefore, it is difficult to create a nexus between one study and the next. …

Forensic And Anti-Forensic Techniques For Object Linking And Embedding 2 (Ole2)-Formatted Documents, Jason M. Daniels

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Common office documents provide significant opportunity for forensic and anti-forensic work. The Object Linking and Embedding 2 (OLE2) specification used primarily by Microsoft’s Office Suite contains unused or dead space regions that can be over written to hide covert channels of communication. This thesis describes a technique to detect those covert channels and also describes a different method of encoding that lowers the probability of detection.

The algorithm developed, called OleDetection, is based on the use of kurtosis and byte frequency distribution statistics to accurately identify OLE2 documents with covert channels. OleDetection is able to correctly identify 99.97 percent of …

Examining The Perceived Benefits For Engaging In Cybersex Behavior Among College Students, Delores D. Rimington

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study examined college students’ cybersex use, perceived benefits of use, time spent online, and compulsive cybersex. Participants consisted of students attending Utah State University Spring semester 2007. Data were collected via an online survey, and 262 surveys were used in the correlation and regression analyses.

Results indicated that age, religion and gender are predictive of perceiving more benefits for cybersex participation. A strong positive correlation was found between perceived benefits and compulsive cybersex use. Students’ lack of social skills was predictive of more time spent online. Time spent online for cybersex was predictive of sexually compulsive behavior. There was …

Cause And Prevention Of Liver Off-Flavor In Five Beef Chuck Muscles, Ranjeeta Wadhwani

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Liver off-flavor is a sporadic problem that limits the consumer acceptance of several beef chuck muscles, including the infraspinatus (flat iron steak). Residual blood hemoglobin is known to contribute to liver off-flavor development. This study was conducted to evaluate factors affecting development of liver off-flavor after cooking of beef chuck (shoulder) muscles. The study was conducted in three parts.

The objective of part 1 was to determine effects of muscle (infraspinatus, longissimus dorsi, serratus ventralis, supraspinatus, teres major) and processing (with or w/o carcass electrical stimulation) on residual blood hemoglobin content and total pigment content of raw muscle …

Teaching Patterns: A Pattern Language For Improving The Quality Of Instruction In Higher Education Settings, Daren Olson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

One method for improving the appeal of instruction is found in Christopher Alexander’s work on architectural design patterns. In this qualitative research study, student comments on teacher/course evaluation forms were analyzed to generate six instructional design patterns. The teacher enthusiasm pattern encourages teachers to show (a) increased scholarship and enthusiasm towards the subject matter, (b) genuine concern and enthusiasm towards the students, and (c) mastery of and enthusiasm towards the act of teaching. The balanced curriculum pattern recommends that teachers (a) determine the appropriate depth or breadth of subject matter and communicate it to the students, (b) create a balanced …

Pulse-Laser Infrared Photothermal Spectrometry Of Condensed-Phase Aerosols Based On Photothermal Deflection Spectroscopy, Oluwatosin Olubunmi Dada

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The research reported in this dissertation is aimed at development of photothermal deflection detector that is consistent with constraints imposed by aerosols sampling and analysis. The main objectives of this project are: 1) the design and evaluation of initial apparatus prototypes and 2) a test of the prototype apparatus with surrogate substances using conventional mid-infrared gas lasers.

Experimental evaluation of reduced size photothermal apparatus is first performed with gaseous samples. Analysis of trichlorofluoromethane (CFC-11) and ethanol vapors is performed with both conventional large apparatus and the prototype small apparatus. Comparison studies in terms of photothermal signal from both apparatuses are …

Integrating Surface And Sub Surface Flow Models Of Different Spatial And Temporal Scales Using Potential Coupling Interfaces, Alphonce Chenjerayi Guzha

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The main objective of this research was to develop and utilize a coupled surface water groundwater model to simulate hydrological responses of watersheds. This was achieved by coupling the U.S. Geological Survey (USGS) groundwater flow model, MODFLOW, and the rainfall runoff model, TOPMODEL, in one case study and coupling MODFLOW with a networked version of TOPMODEL called TOPNET in another case study. The model coupling was achieved using the InCouple approach, which utilizes Potential Coupling Interfaces (PCIs) that are abstractions from model flow diagrams that expose only those aspects of a model relevant to coupling. Coupling the rainfall-runoff models to …

Use Of Stimulus Management Techniques To Reduce Sedentary Behaviors Of Overweight Children, Julie A. Pelletier

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An epidemic proportion of children and adolescents is currently overweight or at-risk of being overweight. This is associated with many negative outcomes, including short-term and long-term health risks, as well as increased psychosocial problems. The etiology of this problem is likely complex, though environmental factors (i.e., factors related to decreased physical activity and increased consumption of calories) have been implicated in previous research. Providing effective, easy-to-implement treatment strategies for children who are overweight or at-risk of being overweight could be helpful to reverse the current epidemic and to decrease current health care costs associated with pediatric obesity. The overall purpose …

Evaluation Of Competition Between Turfgrass And Trees In The Landscape, Christopher A. Hendrickson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Population growth in regions of the Intermountain West has resulted in rapid growth of residential neighborhoods. In Utah, the landscapes associated with these expanding neighborhoods consume vast quantities of treated water. This is a concern in all states of the Intermountain West, as water becomes increasingly scarce. Traditionally used turfgrasses, trees and other plants in Intermountain West landscapes require significant amounts of supplemental water considering the intense sunlight, dry winds and sparse rainfall typical of the region. Characterizing the interactions between turfgrass and tree species in these landscapes can aid in the identification of candidate species that consume less nutritional …

Gene Expression Analysis Of Immobilized Saccharomyces Cerevisiae, Ryan Michael Summers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Immobilization is an effective method to increase ethanol production, as proven by previous research. Results almost exclusively demonstrate an increase in ethanol production by and decrease in reproduction rate of immobilized Saccharomyces cerevisiae cells. Recently, research has been conducted to determine the cause of this change. The extreme variance in results due to lack of technology makes it difficult to determine the cellular changes induced by immobilization. With the advent of new technology, specifically gene expression analysis, the RNA content of cells can be easily and rapidly analyzed.

S. cerevisiae cells were immobilized in 3% (w/v) calcium alginate beads and …

Variational Asymptotic Micromechanics Modeling Of Composite Materials, Tian Tang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The issue of accurately determining the effective properties of composite materials has received the attention of numerous researchers in the last few decades and continues to be in the forefront of material research. Micromechanics models have been proven to be very useful tools for design and analysis of composite materials. In the present work, a versatile micromechanics modeling framework, namely, the Variational Asymptotic Method for Unit Cell Homogenization (VAMUCH), has been invented and various micromechancis models have been constructed in light of this novel framework. Considering the periodicity as a small parameter, we can …

Aminoglycosides And Syringomycin E As Fungicides Against Fusarium Graminearum In Head Blight Disease, Yukie Kawasaki

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Fusarium graminearum is one of the most problematic phytopathogens in US agriculture. This fungus causes head blight, foot rot, and damping off on wheat and barley. The infection lowers the grain yield and causes contamination of the grain product with mycotoxins. Effective control measures are lacking, and new fungicides that kill F. graminearum but remain safe and economical to use are needed. Newly synthesized aminoglycosides (JL22, JL38, JL39, JL40, NEOF004, NEOF005), classic aminoglycosides (amikacin, gentamicin, kanamycin A, kanamycin B, neomycin, and ribostamycin), and a lipopeptide, syringomycin E (SRE), were studied to determine their antifungal potential to control F. graminearum. …

Evaluation Of An Interactive Health Communication Trans Fat Website, Tara Banks

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In order to evaluate the short-term educational and behavioral impact of the American Heart Association's "Face the Fats" web application had upon college students, a study involving 116 Utah State University undergraduate students was conducted. A one-group pre-posttest design was utilized to answer eight research questions focusing on: health risks associated with trans fat, general trans fat knowledge, ability to identify foods containing trans and saturated fats, food label information, healthy alternatives to trans fat, and readiness to change trans fat intake. Participants completed an online pretest survey and then viewed the "Face the Fats" website at their own pace. …

Nursery Production Of Selected Actinorhizal Species, Taun D. Beddes

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An important aspect of sustainable landscaping includes utilization of plants requiring few to no inputs once installed. Limited research exists for many of these species. For this research, we chose four with potential for use: Mexican cliffrose (Purshia mexicana), silver buffaloberry (Shepherdia argentea), roundleaf buffaloberry (Shepherdia rotundifolia), and seaside alder (Alnus maritima). All are actinorhizal, meaning they form a symbiotic relationship with soil-borne Frankia bacteria that fix atmospheric N₂ for plant use. Many actinorhizal species are also native to arid environments where soils have low organic matter (OM) content. We suspect …

An Assessment Of The Perceived Value Of Teacher Portfolios In The Early Years Enhancement (Eye) Program By Primary And Secondary Teachers In Utah's Schools, Teresa J. Denison

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to examine the use of the teacher portfolio as an evaluation of professional development in Utah's new teacher licensing--the Early Year's Enhancement (EYE) program. This study explored teacher perceptions of the value of the portfolio. Results of the study identified the perceived value of teacher portfolios related to: (a) accuracy as an evaluation tool, (b) usefulness with respect to teacher professional growth, (c) feasibility with regard to teacher time, and (d) appropriateness related to the effect of portfolios on teaching practices. It also identified the relationship of the teacher's perceived value and the required …

Effective Practices Of Project Lead The Way Partnership Teams, Cody J. Reutzel

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to gather information from Project Lead The Way (PLTW) partnership team experts. This project follows the methodology of a modified Delphi study. A review of literature in the areas of curriculum development, pre-college engineering, and the Delphi research technique provided the background for the structure utilized. Top programs from across the country were questioned to identify and come to a consensus on top components essential to developing and utilizing a successful PLTW partnership team. The components were categorized into two lists: effective practices utilized to make a program successful and effective practices employed by …

Design Of Tunable Edge-Coupled Microstrip Bandpass Filters, Srinidhi V. Kaveri

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This thesis is a study of tunability of edge-coupled filters. Microstrip edge-coupled bandpass filters are planar structures and have advantages such as easy design procedures and simple integration into circuits.

Three tuning techniques were implemented. The first technique involved the loading of one open end of each coupled into tunable capacitors. The second technique used a tunable resonator in series with the edge-coupled blocks. The final design made use of tunable feedback sections.

A detailed mathematical analysis of each design was performed. MATLAB code based on the analyses was written. The MATLAB simulations were compared to Agilent Advanced Design System …