Digital Commons Network^™

West Virginia 4-H Camp Songs And Music Traditions, Jason A. Burnside

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to determine the role of music in 4-H traditions from the beginning of the organization to the present. In addition to the overall 4-H traditions, the research focused on traditions in the 4-H camping program. The research examined songs, song quality, and the role they played in the 4-H tradition and/or the 4-H camp experience. Differences and similarities of 4-H music from the beginning of the 4-H program in West Virginia to the present day were explored. The study also examined the origins of the songs used in the West Virginia 4-H program discerning …

Social Skills As Predictors Of Theory Of Mind Development Among Children, Lucia A. Salinas

Theses and Dissertations - UTB/UTPA

The present study examined relationships among social skills including deceptive behavior, socioeconomic status, and theory of mind development in 98 predominantly Hispanic 3- to 7-year-old children residing in the Rio Grande Valley of Texas. Measures were of vocabulary, deceptive ability, true belief, and false belief understanding. Children’s interactions with others were also measured through observational methods and parental data was obtained to compute socioeconomic status and validate social skills information. It was hypothesized that social skill development, including deception would emerge along with theory of mind understanding in this population, and that children from households of lower socioeconomic status would …

An Investigation Into Temperature Trending In Railroad Tapered Roller Bearings Through Vibration Monitoring Techniques, Rafael Kristian Maldonado

Theses and Dissertations - UTB/UTPA

A series of laboratory experiments have been conducted at The University of Texas-Pan American to investigate the cause of bearing “temperature trending.” A combination of theoretical and experimental studies has identified potential sources for the abrupt changes in temperature often seen in railroad bearings. Previous studies suggest the possibility of vibration induced roller misalignment as the root cause for temperature trending. Subsequent research conducted by the UTPA team was designed to provide evidence through vibration monitoring techniques for the proposed hypothesis. To that end, a dynamic bearing tester was used to run four bearings at various speeds and loads experienced …

Are Progressive Ratio And Fixed Interval Schedules Of Reinforcement Related Measures Of Impulsivity?, Christine Guiterrez

Theses and Dissertations - UTB/UTPA

The area of impulsivity is widely studied among many different professional fields. However, given the broad brush that has been used to paint the construct of impulsivity, it’s apparent that there is no true agreement on a definitive definition. In the present study, a purely behavioral procedure was tested with 10 female Sprague-Dawley rats who were placed on a progressive ratio and then a fixed interval 20 s schedule of reinforcement to see if these two schedules were related measures of impulsivity. The definition of impulsivity used in this study was relative to the performance of all animals in that …

Trajectories Of Psychological Distress Among Low-Income, Female Survivors Of Hurricane Katrina, Sarah Ryan Lowe

Graduate Doctoral Dissertations

The purpose of this study was to investigate trajectories of psychological distress among low-income women, primarily unmarried and African American, who survived Hurricane Katrina (N = 386). Data were collected in the year prior to the hurricane, as well as approximately one and three years thereafter. Using Latent Class Growth Analysis (LCGA), we detected six distinct trajectory groups. Over half of participants fit into a trajectory consistent with resilience; that is, they maintained low levels of psychological distress over the course of the study, but experienced an elevation in symptoms at the first pre-disaster time point, followed by a return …

The Ecology Of Cognitive Training And Aging, Anya Potter

Graduate Doctoral Dissertations

Older individuals represent the fastest growing portion of the population in the United States, and are threatened by the loss of mobility and independence. The present study examined the relationship of a computer-based training program, specifically Posit Science Cortex^TM with InSight DriveSharp^TM, and performance on neuropsychological measures and an on-road driving paradigm in a normal aging sample. Participants, ranging in ages 60-75 and randomly assigned to the treatment group, completed the DriveSharp^TM as did, subsequently, a wait-list control group. Identical neuropsychological and on-road assessments were conducted at each visit. Neuropsychological assessment of visual attention included the …

Precisely Serializable Snapshot Isolation, Stephen Anthony Revilak

Graduate Doctoral Dissertations

Snapshot Isolation (SI) is a method of database concurrency control that uses timestamps and multiversioning, in preference to pessimistic locking. Since its introduction in 1995, SI has become a popular isolation level, and has been implemented in a variety of database systems: Oracle, Postgres, Microsoft SQL Server, and others. Despite the benefits that SI offers, one of the things it cannot provide is serializability. Past approaches for serializable SI have focused on avoiding dangerous structures (or essential dangerous structures). Dangerous structures are patterns of transaction dependencies that indicate the potential for a non-serializable execution; however, the presence of dangerous structures …

The Social Negotiation Of Ambiguous In-Between Stigmatized Identities: Investigating Identity Processes In Multiracial And Bisexual People, Vali Dagmar Kahn

Graduate Doctoral Dissertations

To date, most bisexual and multiracial identity models in psychology capture a largely internal developmental process (Collins, 2000; Kich, 1992; Weinberg, Williams & Pryor, 1994). However, individuals learn to manage their socially stigmatized identities in social interactions (Goffman, 1963). While the demands to socially negotiate stigmatized identity affect all minority peoples, individuals with in-between ambiguous stigmatized identities, such as multiracial and bisexual people, must negotiate also being situated at the margins of their own reference groups (e.g. heterosexual and gay/lesbian). Using a comparative grounded theory approach, this study explored the question: How do experiences of socially negotiating an in-between ambiguous …

Captain Pierce's Fight: An Investigation Into A King Philip's War Battle And Its Remembrance And Memorialization, Lawrence K. Lacroix

Graduate Masters Theses

On March 26, 1676 Native Americans from southern New England overran a company of Plymouth Colony militia, handing the English one of their worst defeats during King Philip's War. This study was concerned with the reconstruction of the Pierce Battle, as it has come to be known, and its eventual memorialization. The study's two main research questions were: First, to what extent did a complete and critical examination of the primary and secondary sources change, support, or add to the commonly accepted battle perspective? Second, in what ways did a contextual analysis of King Philip's War monuments in Rhode Island …

The Marketplace Of Boston: Macrobotanical Remains From Faneuil Hall, Ciana Faye Meyers

Graduate Masters Theses

Residents of Boston in the eighteenth century utilized a wide range of botanical materials in their daily lives, navigating complex urban marketing systems and utilizing their own individual ingenuity to procure botanical resources. The one thousand eight hundred and eighty-three botanical remains recovered from a "community midden" underneath the present-day Faneuil Hall represents a diverse collection of taxa which encodes information not only about the localized dietary practices of colonial urban residents, but also helps to illuminate the more subtle ramifications of Boston's participation in the Atlantic economy on the lives of its residents. These botanical remains represent taxa from …

Prototype Automated Flow-Through Sensor For Measuring Waterborne Microbial Concentrations Using Bulk Fluorescence, Susan M. Savill

Graduate Masters Theses

Timely and inexpensive monitoring of microbial ecology in the world's water supplies is crucial to the study of environmental and human impact on water quality and the prevention of disease outbreaks. Current technology is lacking in its ability to accurately measure and predict the presence of possible disease pathogens in a timely and cost effective manner. This paper describes the construction and initial testing of an automated prototype water sensor intended to detect fluctuations in microbial density in real-time by using bulk fluorescence of SYBR Gold stained bacteria. The sensor is comprised of off-the-shelf hardware and an in-house designed and …

Sexuality Education, Eva Goldfarb, Norman A. Constantine

Department of Public Health Scholarship and Creative Works

Sexuality education comprises the lifelong intentional processes by which people learn about themselves and others as sexual, gendered beings from biological, psychological, and sociocultural perspectives. It takes place through a potentially wide range of programs and activities in schools, community settings, religious centers, as well as informally within families, among peers, and through electronic and other media. Sexuality education for adolescents occurs in the context of the biological, cognitive, and social-emotional developmental progressions and issues of adolescence. Formal sexuality education falls into two main categories: behavior change approaches, which are represented by abstinence-only and abstinence-plus models, and healthy sexual development …

Peddlers Of Hate: The Existence Of Norm Entrepreneurs As A Necessary Precursor To Genocide, Lauren Elise Fairbanks

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Over the course of the 20th century genocide has been responsible for the murder of more than 170 million people; it is has proven to be four times deadlier than war (Voth, 2007). Although it often appears spontaneous, Genocide is instead a result of certain preconditions. Studies into the causes of genocide ought to aid in the formation of methods intended to keep violence from occurring. Unfortunately, seemingly different factors such as economic crisis, resource scarcity, institutional weakness, and ethnic resentment prove difficult to classify as the ultimate cause. Instead these conditions work collectively to create an atmosphere that is …

Development, Implementation, And Evaluation Of A Social Skills Training Intervention In A Rural Special-School Setting For Students With Mild/Moderate Disabilities, Sheree Duncan

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Given the critical degree to which a person’s level of social competence influences one’s academic, mental, social, and interpersonal success, it is imperative that schools facilitate the learning of social skills. The purpose of this study was to design, implement and evaluate a social skills training intervention for students with mild disabilities (and behaviors that adversely affect their participation in a general curriculum or resource settings) in a rural special school setting. A review of literature guided the design and evaluation of the intervention. According to analysis of data on student behavior, the social skills training intervention did not consistently …

Engineering Model To Calculate Mass Flow Rate Of A Two-Phase Saturated Fluid Through An Injector Orifice, Brian J. Solomon

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

An engineering model is developed to calculate mass flow rate of nitrous oxide, a self-pressurizing saturated oxidizer commonly used in hybrid rocket motors. While use of N_{2}0 cannot be accurately modeled using traditional ideal gas, compressible, or incompressible flow assumptions. To obtain accurate mass flow rate this one-dimensional analysis includes both incompressible fluid and homogeneous equilibrium mass flow rate models. Mass flow calculations from the two models are independently weighted and summed to obtain representative two-phase mass flow rate. Fluid properties are iterated in time by keeping track of fluid enthalpy and are propagated across the injector using either isentropic …

Race-Ethnicity And Medical Services For Infertility: Stratified Reproduction In A Population-Based Sample Of U.S. Women, Arthur L. Greil, Julia Mcquillan, Karina M. Shreffler, Katherine M. Johnson, Kathleen S. Slauson-Blevins

Department of Sociology: Faculty Publications

Evidence of group differences in reproductive control and access to reproductive health care suggests the continued existence of “stratified reproduction” in the United States. Women of color are overrepresented among people with infertility but are underrepresented among those who receive medical services. The authors employ path analysis to uncover mechanisms accounting for these differences among black, Hispanic, Asian, and non-Hispanic white women using a probability-based sample of 2,162 U.S. women. Black and Hispanic women are less likely to receive services than other women. The enabling conditions of income, education, and private insurance partially mediate the relationship between race-ethnicity and receipt …

Impact Of Computerized “Sounding Out” On Spelling Performance Of A Child Who Uses Aac: A Preliminary Report, Jillian H Mccarthy, David R. Beukelman, Tiffany Hogan

Department of Special Education and Communication Disorders: Faculty Publications

Spelling is a vital skill for people who rely on augmentative and alternative communication (AAC). The ability to spell words provides an opportunity to create novel and spontaneous communication and increases educational, social, and employment opportunities for children and adults. However, many children and youth who rely on AAC struggle to gain functional spelling skills and written language. The purpose of this preliminary investigation was to develop a strategy to provide auditory letter-sounds using commercially available computer equipment and to evaluate how such a computerized “sounding out” strategy influences spelling accuracy for one child who required AAC support. The spelling …

Nonparametric Goodness-Of-Fit Tests For Discrete Null Distributions, Taylor B. Arnold, John W. Emerson

The R Journal

Methodology extending nonparametric goodness-of-fit tests to discrete null distributions has existed for several decades. However, modern statistical software has generally failed to provide this methodology to users. We offer a revision of R’s ks.test() function and a new cvm.test() function that fill this need in the R language for two of the most popular nonparametric goodness-of-fit tests. This paper describes these contributions and provides examples of their usage. Particular attention is given to various numerical issues that arise in their implementation.

Ckmeans.1d.Dp: Optimal K-Means Clustering In One Dimension By Dynamic Programming, Haizhou Wang, Mingzhou Song

The R Journal

The heuristic k-means algorithm, widely used for cluster analysis, does not guarantee optimality. We developed a dynamic programming algorithm for optimal one-dimensional clustering. The algorithm is implemented as an R package called Ckmeans.1d.dp. We demonstrate its ad vantage in optimality and runtime over the standard iterative k-means algorithm.

Content-Based Social Network Analysis Of Mailing Lists, Angela Bohn, Ingo Feinerer, Kurt Hornik, Patrick Mair

The R Journal

Social Network Analysis (SNA) provides tools to examine relationships between people. Text Mining (TM) allows capturing the text they produce in Web 2.0 applications, for example, however it neglects their social structure. This paper applies an approach to combine the two methods named “content-based SNA”. Using the R mailing lists, R-help and R-devel, we show how this combination can be used to describe people’s interests and to find out if authors who have similar interests actually communicate. We find that the expected positive relationship between sharing interests and communicating gets stronger as the centrality scores of authors in the communication …

Life History Tradeoffs And Phenotypic Plasticity: The Tale Of A Flight Polyphenic Field Cricket, Chandreyee Mitra

School of Biological Sciences: Dissertations, Theses, and Student Research

Most organisms are resource limited. Such limitations can result in tradeoffs between life history traits -- any traits that affect survival or reproduction. Flight polyphenic field crickets are thought to be a classic example of such a life history tradeoff, in which individuals tradeoff investment in flight capability and investment in reproduction. This polyphenism results from the interaction of two morphological traits: wing morphology (short or long) and flight muscle morphology (functional pink or non-functional white), and is affected by both genes and the environment. I examined life history traits of a flight polyphenic field cricket, Gryllus lineaticeps. First, …

Impact Of Crop And Residue Management On The Physical And Chemical Stabilization Of Soil Organic Matter At Farm Level, Ana B. Wingeyer

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

This dissertation explores changes over time in soil organic matter (SOM) stabilization of two irrigated production fields: a continuous maize sequence that was converted from no-till to conservation deep tillage (Site 1), and a no-till maize-soybean rotation (Site 2). An integrated approach using humic acid extractions and density-based physical fractionation of SOM within aggregate size classes was developed to evaluate the changes in SOM stabilization (physical protection, organo-mineral associations and humification). At Site 1, loss of SOM in the surface layer was compensated for by increased SOM in deeper soil layers with no net change in C stocks. Whole field …

Modeling Parental Provisioning By Red-Winged Blackbirds In North Dakota, George M. Linz, Richard S. Sawin, Mark W. Lutman, William J. Bleier

The Prairie Naturalist

Male red-winged blackbirds (Agelaius phoeniceus) exhibit a difference in nest provisioning rates along an east-west gradient in North America. North Dakota is located in the center of North America and harbors a large population of breeding red-winged blackbirds (RWBL). This location provided an opportunity to compare provisioning rates in the central U.S. with those reported for the eastern and western populations. We placed video cameras at RWBL nests to record male and female feeding trips. Thirty-four nests were located on territories with original males and 30 were on territories where a replacement (floater) male had taken over a …

The Effects Of Academic Advising On College Student Development In Higher Education, Kelly K. Pargett

Department of Educational Administration: Dissertations, Theses, and Student Research

This paper explored the relationship between faculty academic advising and college student development by examining factors such as a student’s academic success, including grade point average, campus involvement, expected graduation date, and job placement upon graduation. The research studied the relationship by examining the student’s age, gender, academic year, ethnicity, and grade point average. Results from this study will be significant to retention, graduation rate, and overall student success at the University of Nebraska-Lincoln. In addition, information gathered from student surveys can help the improvement of faculty advising for all advisors on campus. Results also indicated that the majority of …

Success In One High-Poverty, Urban Elementary School: A Case Study, Shavonna L. Holman

Department of Educational Administration: Dissertations, Theses, and Student Research

The purpose of this qualitative study was to explore the efforts implemented in a high-poverty, urban elementary school in order to increase academic achievement. The central research question was:

1. How do teachers and administrators in a high-poverty, urban school describe the strategies they use to achieve academic success?

The sub-questions were:

1. What are the aspects of the instructional program that assure student success for all students?
2. What changes occurred in the school to achieve its current status?
3. How have the changes been implemented to assure student success?
4. What resources have been instrumental to achieve student success in the school? …

In Vitro Evaluation Of Electrospun Chitosan Mats Crosslinked With Genipin As Guided Tissue Regeneration Barrier Membranes, Peter A. Norowski Jr.

Electronic Theses and Dissertations Archive

Guided tissue regeneration (GTR) is a surgical technique commonly used to exclude bacteria and soft tissues from bone graft sites in oral/maxillofacial bone graft sites by using a barrier membrane to maintain the graft contour and space. Current clinical barrier membrane materials based on expanded polytetrafluoroethylene (ePTFE) and bovine type 1 collagen are non-ideal and experience a number of disadvantages including membrane exposure, bacterial colonization/biofilm formation and premature degradation, all of which result in increased surgical intervention and poor bone regeneration. These materials do not actively participate in tissue regeneration, however bioactive materials, such as chitosan, may provide advantages such …

Seismic Wave Attenuation In The Unconsolidated Sediments Of The Upper Mississippi Embayment, Chigozie Simeon Obikili

Electronic Theses and Dissertations Archive

The attenuation characteristics of P waves in the Upper Mississippi embayment were estimated using U.S. Geological Survey explosion data recorded by 17 Portable Array for Numerical Data Acquisition (PANDA) stations deployed in the New Madrid Seismic Zone. Seven explosive sources, ranging from 500-lbs to 1000-lbs, located west of the PANDA stations were used. Head waves with an apparent velocity of 6km/s and the large amplitude wave train with an apparent velocity of 1.8 to 2km/s are identified from the seismogram. They were interpreted as a P-wave refracted from the top of Pleozoic basement and reverberating P-waves trapped in the unconsolidated …

Weighted Meta Analytic Procedure For Pooling High Throughput Biological Data, Xiaodong Zhou

Electronic Theses and Dissertations Archive

High throughput technologies such as DNA microarray have been widely used to simultaneously measure the expressions of thousands of genes. Analysis of such data often yields to high false positive and false negative rates. When multiple datasets addressing the same scientific question are available, it is clear that integrating them can be more informative, with superior operating characteristics, than any individual study. Pooling the P-values of the statistical tests from the individual studies presents a feasible and proven solution for integrating heterogeneous datasets. However, pooling these P-values with equal weights may result in suboptimal statistical power because of the unequal …

Solution Conformation Of Biologically Active Peptides As Determined By Hydrogen/Deuterium Exchange And Mass Spectrometry, Deepa Kunapuram

Electronic Theses and Dissertations Archive

This research is focused on appplying mass spectrometry based methods to understand the conformational changes of bioactive peptides in solution. In this dissertation, electrospray ionization mass spectrometry (ESI-MS) coupled with hydrogen/deuterium exchange (HDX) has been employed to probe the secondary structure of selected peptides in membrane-mimetic enviroments. The membrane-mimetic systems used in our study include water and trifluoroethanol (TFE). HDX of the amide protons in native proteins depends on the solvent accessibility and spatial arrangement of amino acid residues, thus providing information about the secondary structure of a protein. A total of six biologically active peptides have been chosen for …

Ethnic Difference In Healthcare Delivery, Benny Mathew Varghese

Department of Industrial and Management Systems Engineering: Dissertations, Theses, and Student Research

Quality in healthcare is a very important aspect; this is obtained when there is proper care provided to the patients without any discrimination. The healthcare system in the US can be improved in the fields of patient’s care, the amount of money spent and proper advice, if proper responsibilities are taken. Quality has been improving over the years, but the median by which there is an increase is too small. The other main factor is access to the healthcare system, which has over the year, has not progressed. Studies in healthcare quality should be conducted on a regular base, so …