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Cosmophonia: Musical Expressions of Astronomy and Cosmology

Description: Astronomy and music are both fundamental to cultural identity in the form of various musical styles and calendrical systems. However, since both are governed by incontrovertible laws of physics and therefore precede cultural interpretation, they are potentially useful for insight into the common ground of a shared humanity. This paper discusses three compositions inspired by different aspects of astronomy: Solstitium e Equinoctium, a site-specific composition for four voices and metal pipes involving an inclusive communal musical ritual and sonic meditation; Helios, a short symphonic work inspired by helioseismology; and Perspectives, a piece for soprano and percussion based on a logarithmic map of the universe.
Date: August 2018
Creator: Difalco, Elaine Celleste

Differential Associations between Psychopathy Factors and Shooter Bias in the Police Officer's Dilemma

Description: The current study assessed abnormal attention in 71 undergraduate men, approximately half of which displayed elevated psychopathic traits, as they attended to cues on the Police Officer's Dilemma. In the computerized task, participants are instructed to shoot men holding guns and not shoot men holding neutral objects. However, research has shown that irrelevant racial cues in the task can influence participants to shoot unarmed Black men more frequently than unarmed White men; a phenomenon termed shooter bias. Contrary to expectations, individuals with elevated psychopathic traits tended to erroneously shoot unarmed Black men more frequently compared to those with low psychopathy scores. Additional analyses indicated that the interpersonal and lifestyle facets were associated with more interference in determining unarmed Black men as not threatening relative to unarmed White men and the affective domain was associated with faster responses to shooting armed Black men relative to armed White men. Additionally, prejudicial attitudes (i.e., social dominance orientation) moderated the relationship between the affective psychopathic traits and shooting armed Black men by increasing the number of armed Black men identified as threatening relative to armed White targets. These findings are discussed in the context of the relationship between psychopathic traits and prejudicial attitudes and recent refinements to etiological theories of psychopathy.
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Date: August 2018
Creator: Roy, Sandeep

Religious Identity and Interreligious Communications: Predicting In-Group and Outgroup Bias with Topic-Sentiment Analysis

Description: Intergroup relations and the factors affecting them constitute a subject of recurring interest within the academic community. Social identity theory suggests that group membership and the value we assign to it drives the expression of in-group favoritism and outgroup prejudice, among other intergroup phenomena. The present study examines how (ir)religious identities are related to topic-sentiment polarization in the form of positive in-group and negative outgroup bias during interreligious debates in YouTube commentaries. Drawing from the propositions of social identity theory, six hypotheses were tested. The data for the study, a product of a natural experiment, are comments posted on YouTube commentary sections featuring videos of interreligious debates between (a) Christian and atheist or (b) Christian and Muslim speakers. Using topic-sentiment analysis, a multistage method of topic modeling with latent semantic analysis (LSA) and sentiment analysis, 52,607 comments, for the Christian - atheist debates, and 24,179 comments, for the Christian - Muslim debates, were analyzed. The results offer support (or partial support) to the hypotheses demonstrating identity-specific instances of topic-sentiment polarization to the predicted direction. The study offers valuable insights for the relevance of social identity theory in real-world interreligious interactions, while the successful application of topic-sentiment analysis lends support for the more systematic utilization of this method in the context of social identity theory.
Date: August 2018
Creator: Grigoropoulou, Nikolitsa

Mental Illness Stigma, Parent-Child Communication, and Help-Seeking of Young American Adults with Immigrant Parents

Description: This study examined a mediational model of mental illness stigma, parent-child communication about mental health concerns, and help seeking attitudes/behaviors among young adults with at least one immigrant parent while considering the possible moderating effect of acculturation gap. The primary goal of this study was to examine whether the acculturation gap changed the relation between mental illness stigma and communication about personal mental health concerns with immigrant parents, which in turn could become a significant predictor of their help-seeking attitudes, as well as a barrier to seeking professional mental health services. Findings provided support to the direct and indirect effects of mental illness stigma through communication about mental health concerns on attitudes about help-seeking. The acculturation gap hypothesized to be a possible moderator for the stigma-communication about mental health concerns relationship among young adult ABCI was found to be significant for ABCI with a low mainstream culture acculturation gap. Discussion on the findings, limitations of the study, future research directions, and counseling implications are addressed.
Date: August 2018
Creator: Bismar, Danna

Analysis of Young and Mature Thrombocytes in Zebrafish

Description: Eukaryotic platelets are small cell fragments that are released into the bloodstream from megakaryocytes, and their production is initiated in the bone marrow. They are mainly involved in blood hemostasis and thrombus formation. The newly synthesized platelets are called reticulated platelets or young platelets. Zebrafish thrombocytes are equivalent to mammalian platelets and have similar characteristics and functions. Likewise, zebrafish has both young and mature thrombocytes. Only young thrombocytes as reticulated platelets are labeled with thiazole orange. Similarly, labeling zebrafish thrombocytes with a specific concentration of DiI-C18 showed two populations of thrombocytes (DiI+ and DiI-). Again, only young thrombocytes showed DiI+ labeling. The mechanism of selective labeling of young thrombocytes by is unknown. Furthermore, there is no zebrafish line where young and mature thrombocytes are differentially labeled with fluorescence proteins. Therefore, in this study, we identified and confirmed that the RFP labeled cells of Glofish were young thrombocytes. In addition, we found that myosin light chain 2 (MLC2) promoter is expressed in young thrombocytes. We also generated a transgenic zebrafish line, GloFli fish, where the young and mature thrombocytes are labeled with red and green fluorescence proteins respectively. Furthermore, this study showed a two-fold increase in glycerol-phospholipids (GP) in mature thrombocytes compared to young thrombocytes suggesting the lipid composition may be important for differential labeling. Therefore, we tested the liposomes prepared with different ratios of phosphatidylcholine (PC) and phosphatidylethanolamine (PE) and observed that the lower amounts of PE favor the DiI-C18 labeling whereas higher concentrations of PC are less efficient. Also, in both PE and PC, increased concentrations of both resulted in decreased binding. These results are consistent with our observation that mature thrombocytes have higher concentrations GP and thus DiI-C18 may not bind to them efficiently compared to young thrombocytes.
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Date: August 2018
Creator: Fallatah, Weam

Hydrophobicity of Magnetite Coating on Low Carbon Steel

Description: Superhydrophobic coatings (SHC) with excellent self-cleaning and corrosion resistance property is developed on magnetite coated AISI SAE 1020 steel by using a simple immersion method. Roughness measurement, scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray diffraction (XRD), contact angle measurement (CAM), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), potentiodynamic polarization test, electrochemical impedance spectroscopy (EIS), and qualitative characterization of self-cleaning behavior, antifouling property and durability of the coatings are assessed. A water contact angle as high as 152o on the coated surface with excellent self-cleaning and resistivity to corrosion and good longevity in atmospheric air is obtained. Self-cleaning test results prove that these surfaces can find applications in large scale production of engineering materials. Potentiodynamic polarization tests and EIS tests confirm that the superhydrophobic low carbon steel surfaces have better resistance to corrosion compared to bare steel and magnetite coated steel in 3.5% NaCl solution. But the longevity of the coated steel surfaces in 3.5% salt solution is limited, which is revealed by the immersion durability test. However, hydrophobic coatings (HC) have better stability in normal tap water, and it can stay unharmed up to 15 days. Finally, hydrophobic coatings on low carbon steel surface retains hydrophobic in open atmosphere for more than two months. Results of this investigation show surface roughness is a critical factor in manufacturing hydrophobic steel surfaces. Higher contact angles are obtained for rougher and more uniform surfaces. A linear mathematical relationship (y =6x+104; R2 = 0.93) is obtained between contact angle (y) and surface roughness (x).
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Date: August 2018
Creator: Akhtar, Mst Alpona

Use of Bio-Product/Phase Change Material Composites in the Building Envelope for Building Thermal Control and Energy Savings

Description: This research investigates the bio-products/phase change material (PCM) composites for the building envelope application. Bio-products, such as wood and herb, are porous medium, which can be applied in the building envelope for thermal insulation purpose. PCM is infiltrated into the bio-product (porous medium) to form a composite material. The PCM can absorb/release large amount of latent heat of fusion from/to the building environment during the melting/solidification process. Hence, the PCM-based composite material in the building envelope can efficiently adjust the building interior temperature by utilizing the phase change process, which improves the thermal insulation, and therefore, reduces the load on the HVAC system. Paraffin wax was considered as the PCM in the current studies. The building energy savings were investigated by comparing the composite building envelope material with the conventional material in a unique Zero-Energy (ZØE) Research Lab building at University of North Texas (UNT) through building energy simulation programs (i.e., eQUEST and EnergyPlus). The exact climatic conditions of the local area (Denton, Texas) were used as the input values in the simulations. It was found that the EnergyPlus building simulation program was more suitable for the PCM based building envelope using the latent heat property. Therefore, based on the EnergyPlus simulations, when the conventional structure insulated panel (SIP) in the roof and wall structures were replaced by the herb panel or herb/PCM composite, it was found that around 16.0% of energy savings in heating load and 11.0% in cooling load were obtained by using PCM in the bio-product porous medium.
Date: August 2018
Creator: Boozula, Aravind Reddy

An Ethnography of Direct-to-Consumer Genomics [DTCG]: Design Anthropology Insights for the Product Management of a Disruptive Innovation

Description: Direct-to-consumer genomics (DTCG) health testing offers great promise to humanity, however to date adoption has lagged as a result of consumer awareness, understanding, and previous government regulations restricting DTCG companies from providing information on an individual's genetic predispositions. But in 2017 the broader DTCG market which also includes genealogical testing demonstrated exponential growth, implying that DTCG is starting to diffuse as an innovation. To better understand the sociocultural forces affecting diffusion, adoption, and satisfaction, qualitative ethnographic research was conducted with DTCG genealogy and health consumers. The data was qualitatively analyzed using thematic analysis to understand the similarities and differences in beliefs, attitudes, intentions, and mediating factors that have influenced consumers. Design anthropology theory and methods were used to produce ethnographically informed insights. The insights were then translated into actionable product management and business strategy recommendations.
Date: August 2018
Creator: Artz, Matthew

Effects of a Single Bout of Exercise on Neurocognitive Function following Acute Sleep Loss

Description: Acute sleep loss may lead to elevated fatigue, decreased energy, and diminished cognitive performance. Traditionally, sleep extension is used to restore mood and cognitive function to baseline levels following insufficient sleep, yet this method may not be feasible or preferred. Acute exercise may serve as an affordable and relatively safe intervention to reduce detriments to daytime functioning following sleep loss. The primary purpose of this study was to examine the effects of moderate-intensity aerobic exercise on neurocognitive function following acute sleep restriction. A secondary aim was to examine the effects of exercise in subjective reports of fatigue, energy, and sleepiness following acute sleep restriction. Fifty-six participants, matched by sex, age, and chronotype, were randomly assigned to either an exercise (EX) or seated control (SC) condition. Following a 4-hour sleep restriction protocol, participants completed the oddball paradigm before and after 20 minutes of exercise or stationary sitting. P3 amplitude and latency, arousal, sleepiness, energy, and fatigue were assessed during the experiment. After controlling for pre-test differences, P3 latency was significantly faster following exercise relative to the control group. No significant P3 amplitude differences were observed between conditions. The EX group displayed significant improvements in arousal, sleepiness, energy, and fatigue compared to the SC group. Findings suggest that 20 minutes of moderate-intensity aerobic exercise following acute sleep restriction may improve cognitive processing speeds, as well as improve arousal, sleepiness, energy, and fatigue.
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Date: August 2018
Creator: Carmichael, Kaitlyn E.

Room and Elevated Temperature Sliding Wear Behavior of Cold Sprayed Ni-WC Composite Coatings

Description: The tribological properties of cold sprayed Ni-WC metal matrix composite (MMC) coatings were investigated under dry sliding conditions from room temperature (RT) up to 400°C, and during thermal cycling to explore their temperature adaptive friction and wear behavior. Characterization of worn surfaces was conducted using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and Raman spectroscopy to determine the chemical and microstructural evolution during friction testing. Data provided insights into tribo-oxide formation mechanisms controlling friction and wear. It was determined that the steady-state coefficient of friction (CoF) decreased from 0.41 at RT to 0.32 at 400˚C, while the wear rate increased from 0.5×10-4 mm3/N·m at RT to 3.7×10-4 mm3/N·m at 400˚C. The friction reduction is attributed primarily to the tribochemical formation of lubricious NiO on both the wear track and transfer film adhered to the counterface. The increase in wear is attributed to a combination of thermal softening of the coating and a change in the wear mechanism from adhesive to more abrasive. In addition, the coating exhibited low friction behavior during thermal cycling by restoring the lubricious NiO phase inside the wear track at high temperature intervals. Therefore, cold sprayed Ni-WC coatings are potential candidates for elevated temperature and thermally self-adaptive sliding wear applications.
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Date: August 2018
Creator: Torgerson, Tyler B.

Transitioning from Sport: Retirement and Former Female Collegiate Athletes' Satisfaction with Life, Depressive Symptomatology, and Body Satisfaction

Description: Retirement from elite sport can be highly distressing for athletes, and many athletes report elevated depression and anxiety or body dissatisfaction when going through this transition. Factors that may be important in determining a higher level of adjustment in retirement include feeling in control of when and how retirement occurs, planning occupationally for after sport, and having achieved sport goals. Thus, we examined how such factors related to former female collegiate athletes (N = 218) satisfaction with life, depression, and body satisfaction. Two to six years post retirement, athletes completed an online questionnaire that measured their satisfaction with life, depressive symptomatology, and body satisfaction; retirement factors were measured by the 12-items from the BALANCE scale. Through regression analyses, we examined the extent to which each of the 12 retirement factors is related to life satisfaction, depression, and body satisfaction; time since retirement was unrelated to these outcomes. Future research might address the transition immediately following retirement utilizing these factors that appear most influential.
Date: August 2018
Creator: Wartalowicz, Karolina Maria

"World Life"

Description: During this time of interest and uncertainty in immigration, a foreigner seeking an education, home, and career wonders how welcoming America really is. This documentary film focuses on how the organization known as World Life is involved in helping international students in terms of language, accommodation, and religion. It follows an organization that is willing to open up and welcome them into the community.
Date: August 2018
Creator: Ingabire, Cyuzuzo

Redesigning Police Beat Zone Placement to Improve 911 Response Time: A Data Driven Approach

Description: Research suggests that using data driven solutions in policing strategies improves the quality of service provided by the police department. Unfortunately, many police departments, including the Denton Police Department, do not use their spatial data to inform beat zone placement. Analysis of the current beat zone configuration found that there are disparities in the workload, as measured by number of calls for service, between beat zones. Further, there was also a statistically significant difference between the median response times across all the five beat zones in Denton. This means that the median response time varies depending on where the call for service originates. Using readily available data, these police departments can apply methods such as UPAS to improve the quality of service provided by the department. UPAS is a deterministic algorithm that produces a given number of contiguous spatial partitions of approximately equal population size; in this case, calls for service are substituted for population. Although this algorithm was originally developed to create solutions for bio-terrorism response planning, it has been applied to the problem of creating beat zones of roughly equal workload in this research. I have shown that this algorithm results in a beat zone configuration that significantly reduces the difference in workload between the busiest and least busy beat zone (~94% reduction). Assuming an equal distribution of resources across beat zones, having approximately similar workloads should lead to fewer disparities in quality of service.
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Date: August 2018
Creator: Jones, Brince Robert

Desire Lines: Dérive in Heterotopias

Description: This study provides an examination and application of heterotopic dérive, a concept that combines spatial theories originated by Foucault and psychogeographical methods advocated by the Situationists, as enacted within theatrical performance spaces. The first chapter reviews theories related to space, place, and heterotopias, as well as the psychogeographical methods of the Situationists, particularly the dérive. The literature review is augmented with accounts of my experiences of serendipitous heterotopic dérive over a period of several years as a cast member in, or a technical director for, theatrical productions in the Department of Communication Studies Black Box Theatre. Based on the review, I postulate that heterotopic dérive is a potentially valuable phenomenon that performance studies scholar/artists can utilize consciously in the rehearsal process for mounting theatrical performances. To test this proposition, I worked collaboratively with a theatrical cast to craft a devised performance, Desire Lines, with a conscious effort to engender heterotopic dérive in the process of creating the performance. This performance served as the basis for the second chapter of the study, which analyzes and discusses of the results of that investigation. This project enhances understanding of the significance of the places and spaces in which performers practice their craft, and argues for the potential of recognizing and utilizing the agency of heterotopic spaces such as the Black Box.
Date: August 2018
Creator: Snider, Jesse Rhea

Pathways to Prolonged Grief and Posttraumatic Growth: Examining the Roles of Attachment, Identity Distress, and Shattered Assumptions

Description: The sudden or violent death of a loved one (e.g., suicide, homicide, accident, etc.) poses unique challenges for the bereaved. Research has found such losses to be associated with higher levels of chronic psychological distress, now termed Persistent Complex Bereavement Disorder in the DSM-5 and Prolonged Grief Disorder in the forthcoming ICD-11. The present study, developed through the lens of Multidimensional Grief Theory (MGT; Kaplow et al., 2013), explored underlying mechanisms and risk and protective factors for both prolonged grief and posttraumatic growth. With a mixed college and community sample of 374 traumatically bereaved adults, results of a path analysis suggest that insecure attachment strategies play a significant role in prolonged grief symptoms through the mediators of identity distress and shattered assumptions. Faced with the traumatic loss of a loved one, the ability and desire to effectively access relationships facilitating intentional processing that promotes cognitive reorganization is predicated on the bereaved's internal working model of attachment. Specifically, attachment anxiety in relation to close others and God, and attachment avoidance in relation to close others, were indirectly associated with prolonged grief. However, attachment avoidance in relation to God was negatively associated with both prolonged grief and posttraumatic growth, and there was no evidence for mediation. One explanation for this could be that individuals endorsing divine attachment avoidance are less likely to make negative religious attributions about the death, which have been associated with chronic psychological distress, but are also less likely to be able to utilize the sacred as a context for growth. By considering traumatically bereaved individuals' internal working model of attachment, level of identity distress, and potentially shattered assumptions, our model accounted for each of MGT's three domains of distress thought to impact post-lost adjustment. That these domains were both inter-related and associated with differential outcomes speaks to the ...
Date: August 2018
Creator: Captari, Laura E

Detection of Harmful Chemicals in the Air using Portable Membrane Inlet Mass Spectrometry

Description: Portable mass spectrometry has become an important analytical tool for chemical detection and identification outside of a lab setting. Many variations and applications have been developed to benefit various fields of science. Membrane inlet mass spectrometry is used to allow certain analytes to pass into the mass spectrometer without breaking vacuum or letting in large particulate matter. These two important analytical tools have been applied to the detection of harmful chemicals in the air. Earth-based separations and reverse gas stack modelling are useful mathematical tools that can be used to locate the source of a chemical release by back calculation. Earth-based separations studies the way different molecules will diffuse and separate through the air. Reverse gas stack modelling refers to the concentration differences of a chemical in relation to its distance from its source. These four analytical techniques can be combined to quickly and accurately locate various harmful chemical releases. The same system can be used for many applications and has been tested to detect harmful chemicals within and air-handling system. The monitoring of air-handling systems can greatly reduce the threat of harm to the building occupants by detecting hazardous chemicals and shutting off the air flow to minimize human exposure.
Date: August 2018
Creator: Kretsch, Amanda Renee

Giving Texas Veterans a Voice: Traumatic Experience and Marijuana Use

Description: Disabled veterans with post-traumatic stress disorder (PTSD) exist in a category separate from many civilians and soldiers. Their experiences land them in a category distinctly marked as atypical. The standard protocol to manage this atypical subject position is prescription drugs- a mark of the ill. In a distorted, post-war American society, what happens when veterans with PTSD refuse to be labeled as ‘sick,' ‘different,' or even ‘disabled'? This thesis explores the actions and intricacies of a community of veterans who advocate for medical cannabis to manage associated symptoms of PTSD. This group of veterans campaigns for individuality, both in medical treatment and in personal experience. Collaboratively, their experiential evidence indicates that none can be treated in the same fashion. After a year of participant observation and field work, it becomes apparent that their work both individualizes and unifies the veterans. This thesis details their experiences and the results of their activist campaign to demarcate themselves.
Date: August 2018
Creator: Berard, Amanda Kay

Retail District Evolution: An Exploration of Retail Structure and Diversity, a Case Study in Denton, Texas

Description: It is well established that national retail chains impact small, single location retail businesses in terms of revenue generation, retail structure, retail type diversity, and location. This study examines the retail structure and diversity of five retail districts in the City of Denton, Texas. The analysis focuses on one central business district (CBD), one traditional retail strip center (University Drive, also known as US HWY 380), one special retail district (Fry Street District), one traditional enclosed shopping mall and associated development (Golden Triangle Mall), and one power retail center (Denton Crossing). The empirical foundation for the investigation is a historical business database covering years 1997 to 2010, obtained from Info Group's Reference USA. This Reference USA database includes location, industry, and status (single versus chain location) information for each business. Retail diversity and evenness were measured for each of the five retail districts using the Simpson's Diversity Index and the Simpsons Measure of Evenness, leading to specification of the differences that exist in retail structure and diversity among the districts. Golden Triangle Mall and Denton Crossing were primarily chain location in composition while Fry Street District, the CBD, and University Drive were primarily single location in composition. Across all years, the single versus chain status of the local business communities did not substantially change within any of the districts. The Fry Street District exhibited the most change in diversity as well as the lowest overall diversity among the retail districts, followed by University Drive and Golden Triangle Mall. The CBD did not experience any major change in retail type diversity. However, all retail districts experienced major changes in retail evenness. Overall for the city, single location retail businesses accounted for the majority of all the retail businesses, however, chain locations employed more people. In total, these findings indicate that the ...
Date: August 2018
Creator: Bova, Joshua Paul

Microcantilever Based Viscosity Measurement as it Applies to Oscillation Amplitude Response

Description: The goal of this research is to measure viscosity via the analysis of amplitude response of a piezo driven vibrating cantilevers partially immersed in a viscous medium. As a driving frequency is applied to a piezoceramic material, the external forces acting on the system will affect its maximum amplitude. This thesis applies this principle through experimental and analytical analyses of the proportional relationship between viscosity and the amplitude response of the first natural frequency mode of the sinusoidal vibration. Currently, the few cantilever-based viscometer designs that exist employ resonant frequency response as the parameter by which the viscosity is correlated. The proposed piezoelectric viscometer employs amplitude response in lieu of resonant frequency response. The goal of this aspect of the research was to provide data confirming amplitude response as a viable method for determining viscosity. A miniature piezoelectric plate was mounted to a small stainless-steel cantilever beam. The tip of the cantilever was immersed within various fluid test samples. The cantilever was then swept through a range of frequencies in which the first frequency mode resided. The operating principle being as the viscosity of the fluid increases the amplitude response of cantilever vibration will decrease relatively. What was found was in fact an inversely exponential relationship between dynamic viscosity and the cantilever beam's vibrational amplitude response. The experiment was performed using three types of cantilevers as to experimentally test the sensitivity of each.
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Date: August 2018
Creator: Siegel, Sanford H.

Getting the College Experience: Exploring the Effect of the Residential Component of the Upward Bound Summer Program

Description: Upward Bound is a federally funded program designed to help low-income and first-generation high school students become college graduates by providing them with academic enrichment, financial aid information, and relevant educational experiences. Many Upward Bound programs throughout the country include a 6-week summer program when participants stay in residence halls on a university campus. The Upward Bound program at the University of North Texas is one such program. The goals of this research project are to understand how the residential component of the summer program affects the experience of participants in Upward Bound and the possible benefits it may have towards meeting the overall goals of the program. Participant observation during the 2016 UNT Upward Bound summer program and interviews with participants, RAs, program alumni, and organizational leaders uncovered the ways in which the residential component benefits and enriches the experience of participation in Upward Bound.
Date: August 2018
Creator: Krehbiel, Riley M

Assessment of Caregiver Generalization of Reinforcement in a Large Residential Facility and Use of Prompting and Feedback to Improve Performance

Description: Behavioral skills training (BST) is often used to train caregivers to implement various behavior management procedures; however, additional strategies are sometimes required to promote the generalization of skills from a contrived setting to the natural environment. Generalizing skills to the natural environment requires that the caregiver's behavior transfer from control of stimuli in the contrived setting to stimuli in the natural environment, and the skill continues to be performed with high levels of accuracy. The purpose of this study was to assess the extent to which caregivers generalized the use of social reinforcement, in the form of descriptive praise, from the contrived setting to the natural environment. When caregivers failed to respond to opportunities, a progressive prompt delay was used to bring caregivers' responding under the control of relevant client behavior; feedback was used to improve the accuracy with which caregivers implemented reinforcement. Five caregivers in a large residential facility participated in the study; single-opportunity probes were used to assess caregiver's identification of opportunities and accuracy in implementing reinforcement for two defined client behaviors, compliance and appropriate attention-getting behavior. Results of the study suggest that skills failed to generalize from the contrived setting to the natural environment. However, prompting was effective in training caregivers to identify opportunities to provide reinforcement, and feedback improved implementation of reinforcement.
Date: August 2018
Creator: Licausi, Ashley

The Role of Thyroid Hormone on the Development of Endothermy in White Leghorn Chickens [Gallus gallus]

Description: As chickens hatch, there is a rapid change in their physiology and metabolism associated with attaining endothermy. It is thought that thyroid hormones (TH) play a major role in regulating developmental changes at hatching. In birds, TH regulates skeletal muscle growth, which has a direct impact on the chick's ability to thermoregulate via shivering thermogenesis. To better understand the role of TH in the timing of hatching, development of thermogenic capacity, and metabolic rate, we manipulated plasma TH levels in chicken embryos beginning at 85% development (day 17 of a 21 day incubation) with either thyroperoxidase inhibitor methimazole (MMI) or supplemental triiodothyronine (T3). After TH manipulation, we characterized O2 consumption and body temperature in the thermal neutral zone and during gradual cooling. Externally pipped embryos and 1 day post hatch (dph) chicks were cooled from 35 to 15°C. Manipulation of TH altered the timing of hatching, accelerating hatching under hyperthyroid conditions and decelerating hatching with hypothyroid conditions. Cohen's d revealed a large effect size on body temperature (Tb) of EP embryos of hypothyroid animals when compared to euthyroid animals in environmental temperatures of 32°C to 15°C, which was not seen in 1dph animals. Hyperthyroid EP animals were able to maintain metabolic rate over a wider range of ambient temperatures compared to control and hypothyroid animals, but these differences disappeared in 1dph animals. Here, we find that elevating TH levels prior to hatching accelerated hatching and the animal's thermogeneic ability to respond to cooling, but these differences disappear with age.
Date: August 2018
Creator: Rippamonti, Jessica D

Sonic "Alchemy": An Original Composition for Piano and Electronics with Critical Essay

Description: This paper presents the history and the theoretical study of mixed music and focuses on two piano solo works and two mixed electroacoustic compositions for piano and electronics. By discussing the working process and giving the analysis of the original composition Alchemy for piano and electronics, this paper investigates the relationship between cause, source and spectromorphology, reflecting how the concept of energy-motion trajectory are embodied in this mixed electroacoustic work. Alchemy is a mixed composition for piano solo and 8-channel fixed electronics focusing on the gestural play and sonic expression. The live piano part explores the gestural sound played with a slide (cup), paper clip, and objects placed inside the piano. The 8-channel electronics part is mainly derived from the recorded acoustic piano. It extends the sonic potential of source materials and presents the diverse vectorial movements of spatialization.
Date: August 2018
Creator: Wen, Bihe

Advancing a Community's Conversations About and Engagement with Climate Change

Description: The goal of this project completed for the Greater Northfield Sustainability Collaborative (GNSC) was to understand how Northfield, Minnesota citizens are experiencing climate change. Thirty individuals were interviewed to find out what they know about climate change, what actions they are taking, what they think the solutions are to the problems, and what barriers they have to more fully engaging with climate change issues. The interview results are intended to promote and advance the community's discussion on climate change via social learning and community engagement activities such as town hall forums and community surveys. These activities encourage citizens in the community to have direct input into the development of the community's climate action plan (CAP). Analysis of the interviews showed that the interviewees are witnessing climate change, that most are taking at least some action such as recycling or lowering thermostats, that they can name barriers to their own inaction, that they say communication about climate change remains confusing and is not widespread in Northfield, and that they are able to provide numerous suggestions for what the local and broader leadership should be doing. The analysis also showed wide individual variation within the group. Interviewees who were less knowledgeable about climate were less likely to be taking action and do not participate in social groups where climate change is discussed. Conclusions are that the whole group would like more and better communication and education from our leaders, that they also expect our leaders to be part of creating solutions to climate change, and that the solutions the interviewees suggested provide a very thorough initial list of mitigation and adaptation strategies for the city's future CAP.
Date: August 2018
Creator: Hansen, Carla Grace