During the New Deal, the Civilian Conservation Corps (CCC) put young men to work in state and national parks across the United States. One of such parks, Big Bend National Park, is the focus of this study. The CCC had two camps within the park, one from 1934 to 1937 and another from 1940 to 1942. During their time in Big Bend, the CCC constructed many projects including a road, trails, cabins, and other various structures. The purpose of this study is to delineate the role of the CCC in creating Big Bend National Park and the experience of the CCC during their time in the Big Bend camp. This study determines the role of the CCC through a discussion of the planning done by the CCC for Big Bend National Park and the work completed by the CCC in the park. In doing so, it argues that the CCC played a substantial and significant role in the development and character of the park. This study works to understand the experience of the CCC in Big Bend through a discussion of education, safety, and an investigation of a commanding officer. Through this discussion, the role of the federal government and …

With one in every 59 individuals now diagnosed with autism spectrum disorder (ASD), there is a significant increase in college enrollment for these students, yet, alarmingly, this population has the highest college dropout rate. Using Rawl's social justice theory as the frame, this qualitative study identified the perceptions of students with ASD, their college professors, and the director of the Office of Disability Accommodation (ODA). Perceptions were examined through open-ended surveys regarding awareness of autism, knowledge of student civil rights, and the availability and adequacy of resources provided through the ODA. In addition, the students with autism participated in semi-structured face-to-face interviews. The findings of this study are consistent with other studies in reflecting barriers experienced by students with ASD, such as poor transition planning, communication, and self-advocacy limitations. The variance among reported perceptions revealed a lack of awareness and continuity of resources and support for students with autism, hindering their successful transition from high school to and through post-secondary education. Both students and professors expressed a lack of knowledge of students' rights at the college level and of how to access needed accommodations. These findings reveal the need for a greater awareness of supports needed by students with ASD …

Bacteriophages are viruses that specifically infect bacteria. When a phage infects a bacterium, it attaches itself to the surface of the bacteria and injects its DNA into the intracellular space. The phage DNA hijacks the cellular machinery of the bacteria and forces it to produce phage proteins. Eventually, the bacteria cell bursts or lyses, releasing new phage. The bacteria act as a host for phage reproduction. The ability for a phage to infect multiple bacterial species is known as host range. In siphoviridae bacteriophages, host range is thought to primarily be determined by proteins at the tip of their tail fibers. These proteins act as anti-receptors to specific receptors on the surface of bacteria. In siphoviridae Gram-positive infecting phages, the genes that code these proteins are typically located between the tape measure protein gene and the endolysin gene. It is hypothesized that phages that have similar anti-receptor proteins will have similar host range. In this study, the host ranges of 12 BD1 bacteriophages were tested on 9 different Streptomyces species. In these 12 phages, the genes between the tape measure protein gene and endolysin gene were compared. The 12 phages had high levels of variability in these genes. Five genes …

Computational chemistry has gained interest as a characterization tool to predict photoluminescence, reactivity and structural properties of organic and transition metal complexes. With the rise of methods including relativity, these studies have been expanded to the accurate modeling of luminescence spectra of complexes with considerable spin-orbit splitting due to heavy metal centers as well as the reaction pathways for these complexes to produce natural products such as hydrogen gas. These advances have led to the synthesis and utility of more effective catalysis as well as the development of more effective organic light emitting diodes (OLEDs) through the incorporation of organometallic complexes as emitters instead of typical organic emitters. In terms of significant scientific advancement presented in this work is in relation to the discovery of significant spin-orbit splitting in a gold(I) alkylphosphine complex, where the splitting results in the states that emit in different colors of the visible region of the electromagnetic spectrum. This work also reveals the discovery both computationally and experimentally, of a genuine polar-covalent bond between two-closed shell metals. This work highlights a complex with an incredibly short gold(I) – copper(I) intermetallic distance leading to a vibrational frequency and dissociation energy that is on par with those …

This dissertation presents a data-driven computational epidemic framework to simulate disease epidemics at global mass gatherings. The annual Muslim pilgrimage to Makkah, Saudi Arabia is used to demonstrate the simulation and analysis of various disease transmission scenarios throughout the different stages of the event from the arrival to the departure of international participants. The proposed agent-based epidemic model efficiently captures the demographic, spatial, and temporal heterogeneity at each stage of the global event of Hajj. Experimental results indicate the substantial impact of the demographic and mobility patterns of the heterogeneous population of pilgrims on the progression of the disease spread in the different stages of Hajj. In addition, these simulations suggest that the differences in the spatial and temporal settings in each stage can significantly affect the dynamic of the disease. Finally, the epidemic simulations conducted at the different stages in this dissertation illustrate the impact of the differences between the duration of each stage in the event and the length of the infectious and latent periods. This research contributes to a better understanding of epidemic modeling in the context of global mass gatherings to predict the risk of disease pandemics caused by associated international travel. The computational modeling and …

In this study, a series of denim fiberboards are fabricated using two different resins, malamine urea formaldehyde (MUF) and polymeric methylene diphenyl diisocyanate (pMDI). Two experimental design factors (1) adhesive content and (2) MUF-pMDI weight ratio, were studied. All the denim fiberboard samples were fabricated following the same resin blending, cold-press and hot-press procedures. The physical and mechanical tests were conducted on the fiberboard following the procedures described in ASTM D1037 to obtain such as modulus of elasticity (MOE), modulus of rupture (MOR), internal bond (IB), thickness swell (TS), and water absorption (WA). The results indicated that the MOE was significantly affected by both factors. IB was affected significantly by weight ratio of different glue types, with 17 wt% more MDI resin portion in the core layer of the denim boards, the IB for total adhesive content 15% fiberboard was enhanced by 306%, while for total adhesive content 25% fiberboard, enhanced by 205%. TS and WA, with higher adhesive content used in denim boards' fabrication, and more pMDI portion in the core layer of the boards, the boards' TS and WA was reduced by up to 64.2% and 78.8%, respectively.

This was a descriptive study that was completed to gather information about musical backgrounds of orchestral concert attendees, and to determine if those attendees perceived relationships between past participation in school music programs and current patronage of classical music concerts. Participants completed a survey about their musical experiences from childhood through adulthood, as well as memories from school music programs. Results and analysis of the responses identified common themes among participants' childhoods, their schooling and private lessons, experiences that served as gateways to classical music listening, the aesthetic benefits that they found in concert attendance, and negative responses that they had to music participation. Results also found a large number of pieces and composers that participants recalled from past participation in school music programs. Findings from this study analyze why these experiences were important to participants and why they might serve as motivation to attend classical music concerts or continue to support them. Implications of this study include suggestions for professional music organizations, school music educators, professional classical musicians, and church music directors. Suggestions for further research based on this study's findings are also included.

This thesis presents a multi-stage rectifier for wireless power transfer in biomedical implant systems. The rectifier is built using Schottky diodes. The design has been simulated in 0.5µm and 130nm CMOS processes. The challenges for a rectifier in a wireless power transfer systems are observed to be the efficiency, output voltage yield, operating frequency range and the minimum input voltage the rectifier can convert. The rectifier outperformed the contemporary works in the mentioned criteria.

The purpose of this quantitative secondary data analysis was to examine the effect of family, school, and community context on high schools whose students participate in financial aid preparation services. Data from the High School Longitudinal Study of 2009 were analyzed to answer the two research questions using Perna's conceptual model of college enrollment behaviors that explores how students gain and utilize information about financial aid and college prices. Descriptive statistics were used to determine the extent of high school participation in financial aid services. The results indicated a varying degree of these interventions being offered at high schools ranging from 22% to 52%. Schools sending students reminders of FAFSA deadlines (52%) and disseminating flyers/pamphlets on financial aid (50%) were the only two interventions that had a slight majority of schools participating. Multiple regression was used to determine if a relationship existed between the outcome variable (participation in financial aid preparation services) and several family context and school context predictor variables for eight financial aid interventions. Results revealed school context variables as the best predictors of the outcome variable. Counselor caseload and school control were the most effective in predicting high school participation in the eight financial aid preparation services, …

Online learning is no longer considered novel within higher education. It has emerged as an accepted distinct channel and environment for instructional engagement. There is a notable deficit of works and theoretical constructs specifically addressing the identification and differentiation of online learner types and examining them as a distinct system within the learning environment. Learning effectiveness within an online instructional environment is affected by the individual student engaged in the instruction. The instructional experience of the learner is determined by their individual perceptions of and reactions to both internal and external factors. Therefore, it is critical to address the online learner holistically as a stand-alone systemic dimension of the online learning environment to truly understand their differentiating behaviors, motives, characteristics, and dynamics. The study classified and articulated the distinctive types of learners engaged in online instruction within the higher education context based on the key dynamics, factors, and influencers of the individual in order to provide a more comprehensive understanding of the individuals engaged in learning. Additionally, the study generated a new theoretical model, the taxonomy of online learner types (TOLT) to provide unique insights into the different types of learners and serve as an essential step towards developing awareness …

This research of distance learning in singing study provides some historical framework of long-distance singing study, including research on three former distance singing courses, which exemplify the "best practices" of their time: Siegel-Myers Correspondence School of Music, the Perfect Voice Institute, and the Hermann Klein Phono-Vocal Method: Based Upon the Famous School of Manuel Garcia. I also discuss current trends in long-distance singing study, including interviews and insights from current long-distance singing teachers using cutting edge technology in their virtual studios. Lastly, I make predictions and projections, based on analyses of past "best practices," where this information may have impact upon future methods of distance singing lessons, including conceivable distance singing course components of online degree programs offered at universities.

Eak Tai Ahn is not only the first generation of Korean musicians, composers and conductors to have studied Western music and given successful musical performances in Western countries, but also is among the first to introduce the music of Korea to the West utilizing the Western music system. Korea Fantasy is an important work that helped Ahn win international acclaim. Korea Fantasy is an orchestral piece that evolved along with Ahn's unique life experiences shaped by the state of his native country. The piece is programmatic, depicting the history of Korea, which utilizes musical devices, such as rhythms and quotation that are distinctive musical elements of Korea. This document discusses the political and social history of Korea during Ahn's life time, offers an overview of Ahn's education and musical footsteps, and describes the premiere and reception of Korea Fantasy. Moreover, a discussion of his compositional traits and a musical analysis of Korea Fantasy are presented.

A computerized program was designed to test whether arranging a common element in two, otherwise independent, 2-term correlations (stimulus-stimulus and response-stimulus) would result in emergent simple discriminative-stimulus properties for the antecedent stimulus relative to an arrangement with no common elements programmed. Data from 8 adult participants in this experiment indicate that common element arrangements led to relatively high rates of responding in the presence of the putative discriminative stimulus and relatively low rates or no responding in the presence of the putative s-delta during testing in extinction. Conversely, the uncommon element arrangements produced no clear discriminative control. The current data reflect a comparison of arrangements across subjects. These data support Sidman's (2000) suggestion that common elements among contingencies are sufficient to produce stimulus classes and cause class mergers. The data also have implications for thinking about the mechanism by which and the conditions under which discriminative control develops. Finally, these data have the potential to inform the programming and implementation of reinforcement contingencies in applied settings.

Self-monitoring involves teaching students to be aware of their own behavior, and be able to record whether the behavior happened or not. The present study uses meta-analysis of single case design (SCD) studies to evaluate the effectiveness of self-monitoring interventions that use electronic devices during implementation for individuals with autism spectrum disorder (ASD). Eligible studies were accessed to determine design quality, and examine the use of self-monitoring for individuals diagnosed with ASD. Studies were evaluated against inclusion-exclusion criteria. The studies that met inclusion criteria (n = 15) were assessed with the What Works Clearinghouse (WWC) standards for methodological rigor. The WWC standards were applied to baseline and intervention phases. There were a total of 12 studies with 32 students diagnosed with ASD that met SCD standards without, and with reservations. The 12 studies were evaluated using the Tau-U effect size metric to quantify the percentage of change that was attributed to the self-monitoring intervention. Overall, omnibus Tau-U was 0.96 (95% confidence interval [CI] = [0.89, 1.0]). Limitations and directions for future research are discussed.

Dengue mitigation is a major research area among scientist who are working towards an effective management of the dengue epidemic. An effective dengue mitigation requires several other important components. These components include an accurate epidemic modeling, an efficient epidemic prediction, and an efficient resource allocation for controlling of the spread of the dengue disease. Past studies assumed homogeneous response pattern of the dengue epidemic to climate conditions throughout the regions. The dengue epidemic is climate dependent and also it is geographically dependent. A global model is not sufficient to capture the local variations of the epidemic. We propose a novel method of epidemic modeling considering local variation and that uses micro ensemble of regressors for each region. There are three regressors that are used in the construction of the ensemble. These are support vector regression, ordinary least square regression, and a k-nearest neighbor regression. The best performing regressors get selected into the ensemble. The proposed ensemble determines the risk of dengue epidemic in each region in advance. The risk is then used in risk-based resource allocation. The proposing resource allocation is built based on the genetic algorithm. The algorithm exploits the genetic algorithm with major modifications to its main components, …

First, we show that the Rothberger and 2-Rothberger games are equivalent. Then we adjust the former proof and introduce another game, the restricted Menger game, in order to obtain a broader result. This provides an answer in the context of Hausdorff spaces for an open question posed by Aurichi, Bella, and Dias.

The participant was a 52 year-old woman, diagnosed with a profound intellectual disability, who engaged in high rates of severe self-injurious behaviors (SIB) predominantly in the forms of head banging and head hitting. A series of analyses and interventions was implemented to establish appropriate toileting behavior in the natural environment. Treatment consisted of conjugate reinforcement for optimal toilet positioning with the absence of SIB, episodic positive reinforcement of eliminating in the toilet, and programed generalization across environments and staff. Results showed the maintenance of optimal toilet positioning, decrease in SIB (under 1 instance per min), and appropriate eliminating in 96.3% of all available sessions. Direct support staff were trained to implement the program with 100% fidelity.

The Dallas Morning News is a leader in using engagement journalism to increase and retain digital subscribers. This ethnography examined the efficacy of the engagement journalism work by the News in rebuilding trust and forming relationships with its audience. This research is exceptionally timely as more newsrooms are erecting paywalls to their content and asking their audiences to offer monetary support in exchange for greater access and engagement by journalists. This work is examined through two mass communications theories: functionalism, which says a society can be viewed like an ecosystem as a "system in balance" consisting of complex sets of interrelated activities, each of which supports the others in maintaining the system as a whole; and the dual responsibility model, which says that companies should operate in the best interests of all in the community who depend on them, not only those who benefit financially. Additionally, the work is considered from a human-interaction design standpoint to evaluate whether the News has created affordances that enable the journalists and the readers to communicate, and whether the journalists are effectively practicing service design when publishing news and information for the audience.

The purpose of this study is to provide a historiographical and musical analysis examining the jazz ride cymbal pattern, from its inception on woodblock, small accessory cymbals, hand cymbal mechanisms and brushes through what becomes known as the modern-day ride cymbal pattern. This research examines a wide array of drummers and bandleaders, with the objective of identifying the earliest recordings of this important addition to jazz drumming, and popular music history while analyzing the ride cymbal pattern's evolution through definitive recordings. The study begins with the earliest known recordings that clearly display the pattern as it is played on any of the instruments mentioned above. The research concludes with the jam sessions of the early 1940s at Minton's Playhouse, where the pioneer of bebop drumming, Kenny Clarke, experimented with altering the pattern. At this point, the pattern reach its final level of maturity and has since experienced no subsequent major modification. The historical and geographical analysis uses relevant literature from the field of jazz history in order to interpret and evaluate the impact of the the overall trajectory of the music and players. By surveying newspaper and magazine articles, archival interviews, and photographic sources, combined with audio and film analysis, …

This study examined the relationships between family structure (organization and control), family process (cohesion, expressiveness, and conflict) with parenting sense of competency (parenting efficacy) for mothers (n = 138) engaged in Home Instruction for Parents of Preschool Youngsters (HIPPY) related activities. Family structure in this study looked at how the family system is organized regarding clarity of family rules. In addition, family processes of the research participants looked at daily family routines and interactions. General parenting self-efficacy, task-specific self-efficacy for nurturance, and task-specific self-efficacy for teaching which are the dependent variables, looked at the degree to which parents feel competent and capable of solving problems related to these processes in the parent-child relationship. Research questions were answered using multivariate analysis of canonical correlational analysis (CCA) to examine the associations between the independent and dependent variables. Results showed significant relationship between family structure variables of control and organization and parents' self-report of their general efficacy and their task specific efficacy for teaching and nurturing. The study also showed an inverse relationship between process variable of conflict and overall self-efficacy of parents' and their task specific efficacy for teaching and nurturing.

Undergraduate nursing students face tremendous stress in regards to academic and clinical demands while emotional intelligence (EI) is a topic of interest in the nursing field. This study examined whether problem-focused coping methods for stress are related to ability and personality. In this study, EI represented ability and locus of control (LOC) represented personality. Confrontive coping, seeking social support, and planful problem-solving represented the problem-focused coping variables. A survey instrument which represented a combination of the Assessing Emotions Scale, Perceived Stress Scale, Ways of Coping Scale (Revised), and the Rotter Locus of Control Scale was administered to 11 undergraduate nursing schools during the spring semester of 2019. The results indicated that EI had strong and statistically significant correlations with each of the other variables in the study which were LOC, stress, confrontive coping, seeking social support, and planful problem-solving. The results further supported that EI was a statistically significant predictor for each of the three problem-focused coping variables. It was concluded that level of stress did not mediate the relationship between EI and any of the three problem-focused coping methods. In addition, LOC moderated the relationship between EI and stress. The limitations and possibilities for future research are addressed in …

Research is needed that examines the effects of kiosk technology on restaurant operational performance measures, such as total sales. The study employs a 2X2 between-subjects field experimental design to empirically test the hypothesized relationships proposed in the research model. The data collection site was Burger King located in the student union of a large Tier 1 research university in southwest USA. The independent variables included ordering method (kiosk vs. cashier) and operational volume (peak vs. off-peak). The dependent variables were cognitive and affective attitudes, behavioral intention, satisfaction, sales per person, and order time. Consumers at Burger King were approached before they started ordering their meal to ask for voluntary participation. If they agreed to participate, they were randomly assigned into two test groups. Participants in one test group used kiosk technology to order their meals, while those in the other test groups spoke with a cashier to order their meals. The same number of participants were recruited from peak and non-peak volumes. The seconds used to order was observed and recorded after consumer engagement with the ordering method. After participants ordered, they completed a paper survey that measured their behaviors while ordering with each method and asked participants to indicate …

Many classically-trained clarinetists do not know how to use their performance skills and life experiences to create financially sustainable and artistically fulfilling musical opportunities. Music careers have traditionally included teaching positions in academia and performance positions in professional ensembles. Because of the limited number of jobs in these two areas, clarinetists, and classical musicians in general, often turn to work that provides financial security but may lack artistic fulfillment. The proposed solution to this situation is for musicians to create "portfolio careers," which is defined in this document as a combination of multiple part-time jobs to create full-time work. The purpose of this document was to examine best practices in creating and sustaining a portfolio career through the specific lens of seven clarinetists who have shown themselves to be successful performers and entrepreneurs. Results showed that the best practices include: 1) turn ideas into actions, even if the idea is still in the prototype stage, 2) build and utilize a network of successful and supportive people, 3) say "yes" to opportunities, and 4) find creative work outside the field of music that inspires music-related work.

Since phages use the host resources to replicate themselves after infection, the different sizes of the phage genome should influence the replication rate. We, therefore, hypothesized that the smaller genomes should burst the cell faster than the larger ones. As well, the shorter genomes would have greater burst sizes because they should replicate faster. Here, we obtained 16 phages of various genome length. All phages were isolated on Streptomyces griseus and available in our phage bank at the University of North Texas. We performed one-step growth studies for the 16 phages, as well as determined the host doubling time from its growth curve. The results show that S. griseus grown in nutrient broth has a doubling time of 5 hours and 22 minutes. This doubling time is used as a guideline for the phage growth studies. Because the filamentous nature of the host caused several difficulties during the experiment, we isolated single cells by sonication and centrifugation. After the cell number was determined by viable cell count, the cells were infected with each type of phage using a multiplicity of infection (MOI) of 0.5. The results show that phages' burst times range between 45 (±0, standard error) and 420 (±30) …