Digital Commons Network^™

Sources And Source Processes Of Organic Nitrogen Aerosols In The Atmosphere, Mark E. Erupe

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The research in this dissertation explored the sources and chemistry of organic nitrogen aerosols in the atmosphere. Two approaches were employed: field measurements and laboratory experiments. In order to characterize atmospheric aerosol, two ambient studies were conducted in Cache Valley in Northern Utah during strong winter inversions of 2004 and 2005. The economy of this region is heavily dependent on agriculture. There is also a fast growing urban population. Urban and agricultural emissions, aided by the valley geography and meteorology, led to high concentrations of fine particles that often exceeded the national ambient air quality standards. Aerosol composition was dominated …

Essays On Investment Fluctuation And Market Volatility, Chaoqun Lai

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This dissertation includes two different groups of objects in macroeconomics and financial economics. In macroeconomics, the aggregate investment fluctuation and its relation to an individual firm's behavior have been extensively studied for the past three decades. Most studies on the interdependence behavior of firms' investment focus on the key issue of separating a firm's reaction to others' behavior from reaction to common shocks. However, few researchers have addressed the issue of isolating this endogenous effect from a statistical and econometrical approach. The first essay starts with a comprehensive review of the investment fluctuation and firms' interdependence behavior, followed by an …

Family Involvement In Three Utah Adolescent Residential Treatment Centers, Wesley W. Larson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Family participation in residential treatment for disturbed adolescents has increased over time. A general sense of this movement is that this is beneficial. However, there are no common descriptions of family involvement in residential treatment in the literature. In order to be able to better understand which components of family involvement are most beneficial, we need to first understand how residential treatment centers (RTCs) define and describe family involvement. This study compiled data from interviews with nine participants, one each from administration, therapy staff, and direct care staff level of three northern Utah RTCs that claimed family involvement in youth …

Reported Mental Health Issues And Marital Quality: A Statewide Survey, Joseph Ruben Smart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study included a representative random sample of 886 married individuals in Utah. This sample was surveyed to discover the relationship between demographic variables, reported mental health issues, and marital quality. In addition, this study sought to discover models, using demographic variables and reported mental health issues, to predict for separate dimensions of marital quality. This survey was a replication of a study completed primarily in Oklahoma, with the addition of questions about the participants' mental health.

Spearman's rho, Pearson's R, and multiple regression were used to analyze the data. The results of the study show that: religious beliefs …

Longitudinal And Reciprocal Effects Of Ethnic Identity And Experiences Of Discrimination On Psychosocial Adjustment Of Navajo (Diné) Adolescents, Matthew D. Jones

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study examined the relationships among ethnic identity, cultural identity, experiences of discrimination, their interactions, and their effects on various psychosocial outcomes (self-esteem, depression, sense of school membership, social functioning, substance abuse, substance related problems, delinquent behaviors, and grade point average [GPA]). Data were collected twice over a 2-year period.

Change across time was observed in male adolescents' experiences of discrimination. Affirmation and belonging to Navajo culture was the strongest protective predictor at Time 1, but at Time 2 less consistent patterns of association emerged. Also at Time 2, experiences of discrimination emerged as a powerful negative predictor of psychosocial …

Weight And Body Composition Change During The First Year Of College: A Study Of Traditional Residence Hall Freshmen, Stephanie V. Christensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Overweight and obesity trends are on the rise, and young people are no exception. The popular phrase "Freshman 15" suggests that freshmen in college tend to gain weight faster than other populations. There is a growing body of literature that supports evidence of increased weight gain during the transition from high school to college. This study sought to examine not only weight changes among freshmen, but body composition, body mass index (BMI), and waist circumference (WC) changes as well. Body composition was measured using air displacement plethysmography (Bod Pod®). This study examined changes in both males (n = 45) …

Racial And Ethnic Comparison Of Migration Selectivity: Primary And Repeat Migration, Sang Lim Lee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purposes of this study are to examine migration disparities in primary, onward, and return migration by Hispanics, non-Hispanic black, and non-Hispanic white and to inspect the differences among the various types of migration. In addition, this study explores explanations of the migration disparities. These have been rarely studied because of a lack of proper migration data. This research employs the National Longitudinal Study of Youth (NLSY79) for a logistic regression of primary migration and for a hierarchical generalized linear model (HGLM) of the two types of repeat migration, namely onward and return. The results demonstrate that whites are more …

Hydrogen Production By Anaerobic Fermentation Using Agricultural And Food Processing Wastes Utilizing A Two-Stage Digestion System, Reese S. Thompson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Hydrogen production by means of anaerobic fermentation was researched utilizing three different substrates. Synthetic wastewater, dairy manure, and cheese whey were combined together at different concentrations under batch anaerobic conditions to determine the optimal hydrogen producing potential and waste treatment of each. Cheese whey at a concentration of 55% was combined with dairy manure at a concentration of 45% to produce 1.53 liters of hydrogen per liter of substrate. These results are significant because the control, synthetic wastewater, which was a glucose-based substrate, produced less hydrogen, 1.34 liters per liter of substrate, than the mixture of cheese whey and dairy …

Fabrication Of Long-Fiber-Reinforced Metal Matrix Composites Using Ultrasonic Consolidation, Yanzhe Yang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research is a systematic study exploring a new fabrication methodology for long-fiber-reinforced metal matrix composites (MMCs) using a novel additive manufacturing technology. The research is devoted to the manufacture of long-fiber-reinforced MMC structures using the Ultrasonic Consolidation (UC) process. The main objectives of this research are to investigate the bond formation mechanisms and fiber embedment mechanisms during UC, and further to study the effects of processing parameters on bond formation and fiber embedment, and the resultant macroscopic mechanical properties of UC-made MMC structures.

From a fundamental research point of view, bond formation mechanisms and fiber embedment mechanisms have been …

Utah Middle-Level School Community Councils: An Evaluation Of Compliance, Processes, And Perceived Impact, Richard Jackson Nygaard

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The historical perspective of schools in our democratic society provides a framework of tension between local parent and community control versus professional and state control of public school decisions. Today, federal and state requirements demand increased student achievement. The state of Utah requires each public school to have a school community council (SCC) that is responsible for the development of plans for school improvement. Limited funds are provided to each school community council through the School LAND Trust Program to assist in the implementation of the developed plans for the purpose of increased student achievement. Three Utah middlelevel school community …

Student Achievement And Affective Traits In Electrical Engineering Laboratories Using Traditional And Computer-Based Instrumentation, Matthew D. Lammi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Distance education has the ability to transcend distance and time, reaching students anywhere at any time, particularly those underrepresented in engineering. Engineering is a practice-oriented profession requiring an interweaving of scientific theory and applied hands-on activities. Despite the need for distance education in engineering, few studies have systematically investigated the impact of student achievement and attitude in distance engineering laboratories. This quasi-experimental research addressed that need by studying the cognitive and affective domains of achievement in engineering laboratories while employing computer-based and traditional oscilloscopes. The students from two courses, electrical engineering for nonmajors and electronic fundamentals, were randomly assigned into …

Livestock Mortality At Beef Farms With Chronic Wolf (Canis Lupus) Depredation In The Western Great Lakes Region (Wglr), Arion Vandergon

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Gray wolf (Canis lupus) depredation on beef calves has been studied extensively in recent years. As wolf populations increase throughout the United States there is a corresponding increase in wolf/livestock interactions. Most research concentrates on summaries of reported depredations and surveys of producers affected by depredations. The objective of this study was to present data on the fate of beef calves on 3 farms in Minnesota and Wisconsin over a 2-year period. Predator presence/absence was studied as an indicator of potential depredations. Also, data are presented comparing 2 techniques that may aid researchers and livestock producers with monitoring …

Decadal-Scale Changes On Coral Reefs In Quintana Roo, Mexico, Thaddeus Allen Nicholls

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In 1988 data on coral reef community composition were collected from two areas, Akumal and Chemuyil, Quintana Roo, Mexico, ranging from 5-35m depth. These areas were revisited in 2005 and data were collected by the same methods and at the same depths as in 1988. Data from 1988 and 2005 were compared to determine if the coral reefs had undergone significant changes, and what specific changes had occurred. Chi-square analysis determined that community composition data collected in 1988 are significantly different from data collected in 2005 at all sites and depths within the categories of corals, gorgonians, sponges, and macroalgae. …

Socio-Demographic And Financial Predictors Of Discharged Chapter 12 Bankruptcies For Utah, Idaho, And Wyoming, Jessica Johnson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to examine the socio-demographic and financial characteristics that were associated with the likelihood of a discharge among Chapter 12 bankruptcy filers in Utah, Idaho, and Wyoming. Previous bankruptcy studies conducted in Utah have looked at the same associations in Chapter 7 and Chapter 13. This study contains individual filer-level data from 158 Chapter 12 bankruptcy cases filed in Utah, Idaho, and Wyoming between 1997 and 2005. These cases were accessed through the Web-PACER system, a database of imaged court documents filed in district bankruptcy courts. Free access to this system was given by the …

Employers' Perceptions Of Utah State University's Marriage And Family Therapy Program Requirements, Blake D. Altom

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to assess the influence of program requirements on employability of Utah State University's (USU) marriage and family therapy (MFT) program graduates, the training and employability of USU MFT graduates, and whether or not there is anything that sets these graduates apart from graduates of other MFT programs. Nineteen employers participated in this study. Twelve of these employers were known to have hired USU MFT graduates as the graduates' first employment post-graduation, and seven of the participants were considered potential employers: those who could hire MFTs in the future. Questions were asked to these participants …

Evaluation Of Arrayed-Field Concentration Measurements And U. S. Epa-Regulatory Models For The Determination Of Mixed-Source Particulate Matter Emissions, Derek Jones

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

With the continued population growth and the blurring of the urban and rural interface, air quality impacts associated with agricultural particle-producing processes are becoming increasingly important. There is a lack of emission rate data from these source types and no prescribed measurement technique available to the agricultural and regulatory communities. One technique that has shown promise is combining field measurements with inverse modeling. This approach was used herein to examine particulate emissions from an almond harvesting operation, a cotton ginning facility, and comparative emissions from conservation versus conventional tillage practices. EPAapproved models ISCST3 and AERMOD were used with AirMetrics samplers. …

School-Based Services For Children With Attention-Deficit/Hyperactivity Disorder, Tonya M. Tree

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was designed to present descriptive data from a survey of 201 school psychologists. Psychologists completed a survey addressing current practices for determining placement for students with ADHD including the role of school psychologists in determining placement, how often and who monitors services, where students are served, and what services are provided in each setting. Findings indicated that psychologists were involved less frequently in placement decisions and evaluation for Section 504 than in Special Education. Students with 504 plans received less frequent follow-up than students in Special Education. Results indicated that schools were generally following federal guidelines and recommendations …

Lessons In Humanity: A Memoir, Chelsi Joy Sutton-Linderman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the opening pages of his work, Dog Years; A Memoir, Mark Doty explains: Love for a wordless creature, once it takes hold, is an enchantment, and the enchanted speak, famously, in private mutterings, cryptic riddles, or gibberish. This is why I shouldn't be writing anything about the two dogs that have been such presences for sixteen years of my life. How on earth could I stand at the requisite distance to say anything that might matter? (1)

In this thesis I argue that Doty, among other respected contemporary writers, is saying something that matters when he writes of …

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. …

Bushnell General Military Hospital And The Community Of Brigham City, Utah During World War Ii, Andrea Kaye Carter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bushnell General Military Hospital was an Army World War II hospital in Brigham City, Utah from August 1942 to June 1946. It specialized in treating amputations, maxillofacial surgery, neuropsychiatric conditions, and tropical diseases. It was also one of the first hospitals to experimentally use penicillin. Bushnell was a regional facility for wounded solders from the Mountain States that provided quality medical care to patients. The community of Brigham City and the citizens of other Northern Utah communities were an integral part of the success of Bushnell. Citizens donated time, supplies, and money to support the facility and to assist in …

Self-Medicative Behavior Of Sheep Experiencing Gastrointestinal Nematode Infections And The Postingestive Effects Of Tannin, Larry D. Lisonbee

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Diet selection and self-medication are fundamental to the survival of all species. The abilities to choose healthy foods in response to past consequences are basic elements of evolution. This study explores self-medication regarding tannins both as a medication and as a dietary challenge. In the first study, sheep with natural parasite infections were offered a low quality supplement containing a dose of tannins considered to be therapeutic (medicine), while the control infected lambs received the same supplement without tannins (placebo). This study included a group of parasite-free lambs. The parasitized lambs ate more of the tannin containing supplement than non-parasitized …

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 …

Hydrological Characterization Of A Riparian Vegetation Zone Using High Resolution Multi-Spectral Airborne Imagery, Osama Zaki Akasheh

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Middle Rio Grande River (MRGR) is the main source of fresh water for the state of New Mexico. Located in an arid area with scarce local water resources, this has led to extensive diversions of river water to supply the high demand from municipalities and irrigated agricultural activities. The extensive water diversions over the last few decades have affected the composition of the native riparian vegetation by decreasing the area of cottonwood and coyote willow and increasing the spread of invasive species such as Tamarisk and Russian Olives, harmful to the river system, due to their high transpiration rates, …

Influence Of Supplemental Legumes That Contain Tannins And Saponins On Intake And Diet Digestibility In Sheep Fed Grasses That Contain Alkaloids, Jacob Michael Owens

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

My objectives were to determine if nutritional benefits occur when animals are offered foods with compounds -- alkaloids, saponins, and tannins - that are potentially complementary. I hypothesized that food intake and digestibility increase when lambs consume plants such as alfalfa ALF that contain saponins or birdsfoot trefoil (BFT) that contain tannins when the basal diet is endophyte-infected tall fescue (TF) or reed canarygrass (RCG) both of which contain alkaloids. I predicted that the nutritional status of lambs would be enhanced if basal diets of alkaloid-containing grasses were supplemented with ALF or BFT.

Lambs fed a basal diet of either …

A Study Of Utah Teachers' Developmentally Appropriate Beliefs And Practices As Related To Perceptions Of Kindergarteners' Successful School Entry, Mary Mceuen Darnell

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was an exploration of 450 Utah kindergarten teachers' perceptions of problems children face at the time of kindergarten entry, as well as an examination of the teachers' developmentally appropriate beliefs and practices. Consistent with previous research, teachers' beliefs were found to be more developmentally appropriate than their reported practices. This study also investigated the relationship between both teacher and classroom/school demographics and teachers' developmentally appropriate beliefs and practices. Further, the relationship between teachers' perceptions of children's transition to kindergarten and beliefs, practices, teacher demographics, and classroom/school demographics was studied.

Study findings indicated that teachers perceive 20% of kindergarten …

Enhancing The Proportions Of Healthy Fatty Acids In Milk From Dairy Cows, Korie A.S. Nelson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Twenty cows were used in a repeated measures, block design experiment for 9 wk to determine the effects of feeding partially ruminally inert calcium salts (Ca-salts) of fish oil (FO) and a general fatty acid (FA) supplement (EnerGII) at varying levels. The effects on cow health, milk components, composition of milk FA, and sensory evaluation of milk were evaluated. Cows in the 4 treatments were fed either a control diet of 57% forage and 43% concentrate mix with EnerGII fat supplement at 1.65% of diet DM (CTL) or EnerGII in basal diet was partially replaced with (a) 0.21% …

Mother-Child Interactions Among Latino Families And European-American Families In Relation To Children's Language Outcomes, Katie Christiansen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The number of Latino families in the United States is increasing dramatically. For some of the children in these families, the acquisition of reading skills is hampered by inadequate early language development. Early language development is a key predictor of reading success. Identifying ways in which parents in these families can help children acquire early language skills will better prepare them for acquiring reading skills.

This study used a new parenting measure, PICCOLO, to identify parenting behaviors that are related to children's language development. The primary focus of this project was on Spanish-speaking Latino families, but a group of English-speaking …

Mechanisms Of Nutrition Bar Hardening: Effect Of Hydrolyzed Whey Protein And Carbohydrate Source, Shaun P. Adams

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The influence of increasing hydrolyzed protein content on the microstructure and hardness of high protein nutrition bars was investigated to determine the mechanism of hardening during storage. Bars with various hydrolyzed protein levels were manufactured using differing ratios of 0, 25, 50, 75, 100% (wt. /wt.) of partially hydrolyzed whey protein isolate (HWPI) to an intact (non-hydrolyzed) whey protein isolate (WPI) which made up approximately 38% of the total bar composition. High fructose corn syrup (HFCS) (42%) and vegetable shortening (20%) constituted the rest of the ingredients. Accelerated aging was performed by storing bars at 32 ^oC for 36 …

Threat Perception As A Determinant Of Pro-Environmental Behaviors: Public Involvement In Air Pollution Abatement In Cache Valley, Utah, Joshua D. Marquit

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Threat perception related to environmental issues such as air pollution may be a determinant of pro-environmental behaviors. Among the potential threats of air pollution, include the perceived impacts on the psychological, social, and economic wellbeing of a community. Because of rapid increases in population growth, urbanization, and the mountainous landscapes, the American West is extremely susceptible to the adverse impacts of air pollution.

A secondary data analysis was conducted using data from the Air Quality Perception Survey conducted in Cache County, Utah. The survey focused on the public perception of air pollution in Cache County and perceived impact on personal …

Agroforestry Practice Adoption Among Solomon Island Women On The Island Of Malaita, Etta K. Sechrest

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The goal of agricultural training is the adoption and diffusion of introduced agriculture techniques. New subsistence agricultural techniques have been introduced mainly to the male population in many developing countries, even though most subsistence farmers are women. Therefore, an understanding of how new subsistence agricultural techniques can be introduced and adopted by women would be important to achieve. This study focuses on women's adoption of agricultural techniques. It takes place on the island of Malaita, in the Solomon Islands. The study looks at the adoption of agroforestry and several other subsistence techniques that were introduced under a joint program by …