STOL landing thrust: Reverser jet flowfields

Analysis tools and modeling concepts for jet flow fields encountered upon use of thrust reversers for high performance military aircraft are described. A semi-empirical model of the reverser ground wall jet interaction with the uniform cross flow due to aircraft forward velocity is described. This ground interaction model is used to demonstrate exhaust gas ingestion conditions. The effects of control of exhaust jet vector angle, lateral splay, and moving versus fixed ground simulation are discussed. The Adler/Baron jet-in-cross flow model is used in conjunction with three dimensional panel methods to investigate the upper surface jet induced flow field

Investigation of impingement region and wall jets formed by the interaction of high aspect ratio lift jets and a ground plane

Flow characteristics of impinging jets emanating from rectangular exit area converging nozzles of exit area aspect ratio four, six, and eight were investigated. Azimuthal distributions of wall jet radial momentum flux in the ground plane were strongly directional and sensitive to rectangular nozzle exit area aspect ratio, jet impingement angle, and height above ground, H/D. Effects of jet exit velocity profile nonuniformities were also investigated. Data from the single nozzle rectangular jet impringement investigations were incorporated into an existing VTOL aircraft ground flow field computer program. It is suggested that this program together with the Douglas Neumann program modified for V/STOL applications may be used for the analysis and prediction of flow fields and resulting forces and moments on multijet V/STOL aircraft hovering in ground effect

Research Briefs: Teaching and Learning Science in the 21st Century: Challenging Critical Assumptions in Post-Secondary Science

Teaching and Learning Science in the 21st Century: Challenging Critical Assumptions in Post-Secondary Scienc

Adam Smith and William James on the psychological basis of progress

This paper identifies extensive connections between Adam Smith’s and William James’s accounts of the psychological basis of intellectual, material and moral progress. These connections are brought into focus through discussion of their shared circumspection towards claims to objective truth, which highlights Smith’s distance from mainstream interpretations of his contributions to economics. The paper additionally argues that insight into the sustained emphases that Smith and James place upon the role of psychological satisfaction as a motivating factor in societal and personal progress can aid current efforts to draw upon their work and to reconcile the disciplines that they are widely credited with founding

Obesity in the Geriatric Population

This retrospective cross-sectional study focused on patients who were 65 years and older who have Medicare and an ICD10 code of obesity. The study uses archival billing data from the 2017 Medicare 5% Limited Data Set to examine use of bariatric surgery. This study examined the different characteristics (geographic region, age, sex, co-morbidities) for all patients with a BMI greater than 40 who had bariatric surgery in 2017 compared to patients with a BMI greater than 40 who did not receive a surgical intervention. Results found that patients who are female are associated with higher odds of receiving bariatric surgery. Patients who are older, dual eligible for Medicare and Medicaid, or have a diagnosis of diabetes with complications are associated with lower odds of receiving bariatric surgery. The results of this study should be used to target patients over the age 65, have a diagnosis of obesity, and are considering making healthy lifestyle change with bariatric surgery or other healthy options

From Worldviews to Classrooms: Framing Evolution Acceptance in Pre-Service Science Teachers in the Southeastern United States

Research demonstrates that teachers\u27 acceptance or rejection of evolution impacts whether they teach evolution in their classrooms. Furthermore, factors such as religiosity and nature of science understanding impact acceptance or rejection. What is absent from the literature is an exploration of experiences that inform choices made regarding acceptance or rejection, experiences that illuminate the counter-intuitive relationships demonstrated in quantitative studies. For this reason, we explore the lived experiences that inform the worldviews of Pre-Service Secondary Science Teachers (PSSTs) and how those worldviews might inform their acceptance or rejection of evolution. Coding and pattern analysis informed themes within the data explaining how worldviews and evolution intersect, influencing acceptance or rejection. Themes included framing of experiences by worldviews, levels of commitment to religiosity, lack of consistent exposure to evolution, conflicting and coping, and the fact that PSSTs are already thinking about whether to teach evolution before they enter the classroom. Exploring these interactions and the process by which PSSTs negotiate acceptance or rejection provide insights for support and rich preparation in order to ease the process and positively impact the teaching of evolution, and other controversial topics. Understanding how PSSTs think about evolution can inform teacher education and science education, using understanding of our past and present to impact the future

A Baseline Measurement of Alcohol Use and Its Relating Factors as It Pertains to Abilene Christian University

Many studies show correlation in the understanding of social norms relating to drugs and alcohol use on college campuses and the effectiveness of campus alcohol education and prevention programs (Borsari & Carey, 2003; Dvorak et al., 2018; LaChance et al., 2009). Interest in alcohol education programs is increasing across the U.S. due to universities being asked to take more accountability for their students’ actions and the consequences of those actions, both on and off campus (Knoll v. Board of Regents of University of Nebraska, 1999). However, managing student drinking patterns is a daunting task for universities, as research indicates that the belief of peer use is the most telling marker of a student’s potential to use, and alcohol consumption is being marketed as central to the college experience by mass media outlets and social media platforms (Cleveland, Turrisi, Reavy, Ackerman, & Buxton, 2018). While there is research available regarding the effectiveness of university alcohol policies and education programs, and the importance of university specific social norming data in effectively implementing both of those things, there has not been any research conducted in the Abilene Christian University (ACU) population to establish a baseline measurement of social norm data and begin the conversation of how these variables affect students’ choices relating to alcohol consumption in their time as students of the university. The purpose of this study was to gather a baseline measurement of the culture of alcohol use and education as it exists on ACU’s campus. This includes, but is not limited to, analyzing baseline social norm data, measuring the effectiveness of the currently utilized alcohol education curriculum, and analyzing correlations between student characteristics and their reported patterns of use. This thesis will include a review of literature, an explanation of methodology, and an exploration of potential implications for policy, practice, and research that may come as a result of the findings of this study