University of Tennessee at Chattanooga

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    2405 research outputs found

    Advances in high-speed store separation for upward-ejected stores and dynamic cavity doors

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    As technology continues to evolve for aircraft-deployed weapons, computational approaches to store separation analysis face new challenges. Anticipating vehicle designs that require upward store ejection, this study uses computational fluid dynamics and 6DoF motion analysis to predict such store trajectories in high-speed flow. Several store designs are analyzed at various ejection velocities in Mach 4 and Mach 6 conditions. The trajectory results show that streamlined store geometries may not induce sufficient drag to clear the aircraft after ejection. However, store designs with drag-enhancing features show potential for safe separation trajectories. To account for the unsteady effects of a cavity door which opens just prior to store ejection, dynamic cavity door simulations are presented, comparing their results to a quasi-static approach. The results show that such cavity opening effects impact pressure loads on the store, which may be critical for accurate store trajectory predictions

    Iuno… Saevissima: patriarchy, divinity, and villainy in imperial Roman epic

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    Juno is a Roman deity with a significant amount of scholarship around her impact on Roman literature and Roman social life. Her divine department is as the protector of motherhood, banks, family order, marriage, and women in general. Many Roman temples still exist that immortalize her. However, there is another aspect to her character that is at odds to her portrayal in day-to-day Roman life, mainly her portrayal in the Roman epics of Virgil\u27s Aeneid and Silius Italicus\u27 Punica. Virgil (fl. ~26. B.C.) and Silius Italicus (b. ~26 A.D.) wrote, respectively, examples of epic literature, both which detail the myths that revolve around Roman bellicosity. Both portray the queen of the heavens, Juno, in a negative light. These accounts of Juno’s relationships to Roman heroes and villains provide a view into their authors’ viewpoints especially regarding theories of divinity, the purposes of mythography, and the Roman understanding of female status. These interpretations of Juno as an adversarial deity reveal not only the authors’ propagandistic and deeply political ideologies, but also the social norms underpinning their stories

    Investigating the relationship between hybrid work, job burnout, and job satisfaction in higher education

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    This study investigated the relationship between hybrid work, job burnout, and job satisfaction in higher education. Amid the 2020 coronavirus (COVID-19) pandemic, many organizations began shifting their workplace model to encourage hybrid work. This research gleaned insight into the administrative staff perspective to provide data-informed support for higher education leaders when continuing or implementing hybrid work. Two measurement instruments were utilized, including the Maslach’s Burnout Inventory – General Survey (MBI-GS) and the Job Satisfaction Survey (JSS), along with demographic questions and three open-ended questions for hybrid-staff only. The combined survey was electronically administered to staff employed with three public higher education governing offices or coordinating bodies in one southeastern state. Virtual interviews were also conducted with hybrid staff. Quantitative methods were utilized to understand differences and relationships between the independent variables, including mode of work, length of service, job type, and salary, and the dependent variables, JSS and MBI-GS subscale scores. Length of service and the MBI-GS burnout dimension of emotional exhaustion were positively correlated, indicating as participant length of service increases, the frequency of feeling exhaustion also increases. There were no significant differences in job satisfaction or burnout dimensions by mode of work, or evidenced relational effects based on the remaining attribute variables. The rich qualitative data provided suggestions for how higher education organizations can increase job satisfaction and support staff

    The benefits of increasing access to theatre education in K-12 schools

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    Theatre has been a part of education in the United States since the nineteenth century, when Horace Mann launched the public-school movement, and educators introduced the children of immigrants to American language and culture. The use of theatre in education has gradually evolved along with K-12 curriculums in the United States. However, during this time, theatre has not been used as well or much as it could be, even though participation in theatre can improve students’ educational achievements while simultaneously teaching important life skills. In my research, I look at how theatre can be a vital part of education in secondary schools in the United States and how theatre can help school systems reach their educational goals. After reading a range of studies about the benefits of theatre, I analyzed the Hamilton County, Tennessee, Board of Education’s strategic plan, Opportunity 2030, to see how theatre aligns with its goals. Even though Opportunity 2030 does not mention the inclusion of theatre to achieve its goals, my research demonstrates that theatre provides undeniable benefits for students, advancing the educational goals set forth in school districts’ strategic plans

    The only disability in life is a bad attitude : A quantitative exploration of the impacts of inspiration porn

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    Inspiration porn is a social media representation of visibly disabled individuals performing physical activities accompanied by short motivation captions meant to inspire viewers. Critics of inspiration porn hold that it misrepresents the reality of disability and negatively impacts disabled people. This study aimed to quantitatively explore the impacts of inspiration porn on various disability-related variables, as there is limited research on this topic. We hypothesized that exposure to inspiration porn would increase system justification and belief in a just world, decrease support for disability-related policies, and cause viewers to view disabled individuals as sources of inspiration. We also had several exploratory hypotheses. We hypothesized that exposure to inspiration porn would increase dehumanization of and prejudice towards disabled people. Additionally, we hypothesized exposure to inspiration porn would increase support for the medical model of disability and decrease support for the social model of disability. In this study participants (n = 296) saw either inspiration porn or a control image and then completed self-report measures of our dependent variables. Our results were mostly null; however, exposure to inspiration porn did increase the dehumanization of disabled people. We hope this work brings awareness to the negative impacts of inspiration porn

    Do you know the pangolin?: Analyzing biodiversity awareness and attitudes

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    Understanding the impact education has on environmental knowledge and values is critical for knowing how we can promote pro-environmental awareness and attitudes. Thus, this study investigated how environmental education level influences awareness and attitudes on environmental issues, specifically the Biodiversity Crisis. Through a survey primarily utilizing Likert scale statements, the researcher evaluated the differences in knowledge and care levels between classes taking an introductory environmental science course, one class of environmental science majors and one for non-majors. One focus point of the course is the world’s most trafficked mammal, the pangolin, so this species was used as a focus species to evaluate people’s awareness of the role of overexploitation in the Biodiversity Crisis. Conducting the survey on the first day of class and again on the last day allowed the researcher to perform a one-way t-test to test for changes in people’s knowledge and care after taking the course. The study found that education plays a significant role in affecting people’s biodiversity knowledge and how much they care about biodiversity. The classes were significantly different in both awareness level and their attitudes at the beginning of the semester, with the class of ESC majors having more positive responses than the non-majors. Both classes had a significant increase in awareness and attitudes about the Biodiversity Crisis after taking the course. By the end of the semester, both classes were equally knowledgeable about the Biodiversity Crisis, though the ESC majors still had a higher care score overall

    Lucille excerpts

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    The thesis titled “Lucille Excerpts” by Graicen O’Neal Hixson contains two parts. The first is a ten-page craft paper analyzing worldbuilding within three novels: The Hunger Games by Suzanne Collins, The Road by Cormac McCarthy, and Annihilation by Jeff VanderMeer. The craft paper uses the book Wonderbook: The Illustrative Guide to Creating Imaginative Fiction by Jeff VanderMeer to analyze how setting and character form worldbuilding within the three chosen novels. This thesis also contains approximately fifty pages of prose from Lucille, a dystopian novel about the titular character’s world-altering actions after the murder of her wife by their government. The multi-chapter excerpts from this novel are non-chronological with summaries of the plot between chapters

    Declare I Dare Not

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    This thesis contains two parts: a craft paper on dialogue and seven chapters of a young adult historical fiction novel. The craft paper focuses on the use of dialogue to convey information rather than other means such as backstory and flashback, and it analyses these strategies in three historical novels, Wolf Hall and Bring Up the Bodies by Hilary Mantel and Anne Boleyn: A King’s Obsession by Alison Weir. The novel chapters included are from Act III of Declare I Dare Not, focusing on the tumultuous ending of Anne Boleyn’s reign as Queen of England. After using witchcraft to seduce the king and secure her throne in earlier chapters, Anne now faces her downfall as Henry VIII’s eye turns elsewhere and he prepares to rid himself of her for good

    Developing and validating a measure for recovery motives

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    “Workplace Recovery” refers to the replenishment of workers\u27 energetic resources which is an important process for bettering workers’ personal lives and their organization. Regularly engaging in workplace recovery has significant benefits for work and home domains. Yet, there has been little to no research on what motivates employees on an individual level to participate in recovery behaviors. The present study identified individual motivations to engage in recovery through interviews. Responses were used to create a Motives for Recovery scale which was then validated in a survey study. Three common motivational themes were identified; self-regulation, social and personal development, and externally driven roles. Self-regulation and social/personal development tended to correlate more with well-being outcomes while externally driven role motives tended to correlate with work outcomes. This scale could be used to identify common motivations for engaging in recovery, which can help aid in relevant recovery interventions

    Determining the antimicrobial activity and permeabilizing effects of polyunsaturated fatty acids and piscidins on Vibrio parahaemolyticus and Vibrio vulnificus

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    Antimicrobial peptides (AMPs) are found in all organisms and have gained attention for their effectiveness against a variety of pathogens. Piscidins are AMPs that were discovered in mast cells of vertebrates, mostly within marine animals, and are an important part of the innate immune system due to their potent antimicrobial properties. Piscidin 1 (P1) and piscidin 3 (P3) are found within sea bass and have different antimicrobial activities. P1 exhibits strong membrane disruptive properties, while P3 goes through the membrane to the targeted DNA. These piscidins can experience metalation with copper (Cu2+) which enhances their antimicrobial activity in vitro (P1-Cu2+ and P3-Cu2+). V. parahaemolyticus is one of the leading foodborne pathogens in humans, causing acute gastrointestinal and immunological disorders. V. vulnificus has high mortality (18%) and economic burden ($320 million/year worldwide), causing necrotizing fasciitis and sepsis leading to approximately 100 deaths per year in the United States. The purpose of this study was to investigate the activity of metalated and nonmetallated P1 and P3 on Vibrio parahaemolyticus and Vibrio vulnificus, as the Vibrio genus possesses the ability to modify membrane permeability based on the available ambient fatty acids. To examine polyunsaturated fatty acid (PUFA) impacts on piscidin activity, we performed membrane permeability assays with the hydrophobic crystal violet and minimal inhibitory concentration (MIC) assays with linoleic (18:2), arachidonic (20:4) and docosahexaenoic (22:6) acids. In V. parahaemolyticus, PUFAS raised the MIC for P1 and P1-Cu2+ while the opposite effect was observed with P3 and P3-Cu2+. The data highlights antimicrobial susceptibility differences dependent upon the piscidin isoform. Each PUFA caused a distinct change in membrane permeability, while the effects of each piscidin were variable. In V. vulnificus, at least one PUFA raised the MIC of each piscidin. All PUFAs lowered permeability, but significant piscidin-dependent effects were observed with P1 only. The data herein sheds light on bacterial membrane dynamics regarding piscidin activity and PUFA-mediated effects which could potentially be used as future treatment for infectious diseases


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