1,972 research outputs found

    Battling the big one: LGBTQ inclusive art education during the Trump era

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    Recently, because of our new political atmosphere, there have been many attacks on lesbian, gay, bisexual, transgender, and queer, or LGBTQ+, individuals and communities. Even though there have been positive developments in the past few years, homophobia is still a major concern for many people in the Unit- ed States. These issues often manifest themselves to a greater degree within the microcosm of public schools where LGBTQ+ students are forced to deal with hateful speech, heteronorma- tive environments, and rampant homophobia. These strugglescan have harmful e ects on the social and emotional develop- ment of queer youth. Progressive and inclusive art educationthat provides re ective and thoughtful creative projects may aidin identity development, increase self-esteem, and encourage activism, thus helping to improve the lives of LGBTQ+ youth and educators

    Synthetic Methods Development Towards the Total Synthesis of Chlorosulfolipids

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    The focus of this dissertation is the development of a novel chlorination reaction utilizing a triphosgene-amine based mixture towards the total synthesis of chlorosulfolipids, a subclass of naturally occurring organohalogen natural products. This novel, mild chlorination reaction will be utilized under a global chlorination strategy to chlorinate multiple alcohol substituents in one synthetic operation. Chapter one details the history of chlorosulfolipids from the early stages of their isolation, relevant structural elucidation techniques, appropriate biosynthetic discoveries, and their biological relevance to a thorough investigation of the total syntheses completed to date. These compounds demonstrate a range of biological activities and have largely gone ignored by synthetic organic chemist for over 40 years since their discovery in freshwater microalga. Chapter two describes our interest in chlorosulfolipids and the importance of developing a synthetic strategy to achieving the total synthesis of these natural products. This chapter introduces our novel chlorination methodology, utilizing a triphosgene-triethylamine mixture to convert unactivated aliphatic primary alcohols to their corresponding primary alkyl chlorides. An unanticipated result arose in which α-branched primary alcohols produced diethylcarbamates and secondary alcohols afforded a mixture of chlorination and diethylcarbamate products. Mechanistic studies revealed a competitive reaction pathway driven by sterics. In chapter three, the optimization for chlorinating secondary alcohols and α-branched primary alcohols is discussed. This chapter focuses on resolving the reactivity concerns posed by the triphosgene-triethylamine activation of primary alcohols. Herein, we discover that a triphosgene-pyridine mixture readily improves the reactivity of secondary alcohols and α-branched primary alcohols to produce their corresponding alkyl chlorides. We also investigate the chlorination of racemic 1,3- and 1,6-diols in our initial attempts at a global chlorination. Chapter four details the stereospecific dichlorination of stereocomplementary 1,3-anti and 1,3-syn diols using a mixture of triphosgene-pyridine. 1,3-anti diols readily reacted to produce the corresponding 1,3-anti dichlorides. It was discovered that 1,3-syn diols must be modified into monosilylethers in order to access the corresponding 1,3-syn dichlorides. We also investigate the chlorination of stereocomplementary 1,3,5-triols to afford the 1,3,5-trichlorides in a global chlorination strategy introducing three C-Cl bonds

    A comparative study and data analysis for the Ultimate Fighting Championship

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    Mixed Martial Arts is the fastest growing sport with many organizations worldwide. The biggest stage or biggest organization for Mixed Martial Arts is the Ultimate Fighting Championship (UFC). There are eight weight classes for men. The website: http://www.foxsports.com/ufc/stats provides data on fighters in all these categories. This data measures Striking Accuracy, Take downs, Reversals, Knockdowns, etc. in each category. It is interesting to understand and interpret all these numbers and study their relationships. Statistical tools like both parametric and nonparametric inference may give rise to such interpretations and provide explanations how the weight classes differ from one another. In this study, we selected 30 fighters per weight class and conducted some comparative study. Using Correlation Analysis, Shapiro-Wilk Test, Levene’s Test ANOVA, and Kruskal-Wallis Test. We believe that our study will give rise to many striking insights, which may be of help for future research

    Evaluation of Food Insecurity in Students Attending a University in the Southern Region of the United States

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    Food insecurity plagues college students and is associated with negative health and academic outcomes. The aim of the study was to examine the prevalence of food insecurity, its determinants, and food intake outcomes associated with students found to have low food security. A cross-sectional study design of Mississippi university students completed online surveys that included socio-demographic, Adult Food Security questions, coping strategies, and money expenditures. Descriptive, correlation, and chi-square analyses determined how student characteristics were associated with food security. A total of 246 (41.3%) students were food insecure. Significant variables associated with food insecurity were African American or other minority, low GPA, use of public transportation, do not own a car, reported fair or poor perceived health status, higher money expenditure scores, and lower coping strategy scores. Additional research and institutional strategies are needed to close the gap of food insecurity among this population

    MOBILE CUBESAT COMMAND AND CONTROL GROUND STATION ARCHITECTURE FOR FREE-SPACE OPTICAL COMMUNICATION RECEIVER

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    The United States military continues to encourage the need for robust satellite communications in order to successfully execute defense missions. CubeSats are a smaller-scale spacecraft, initially utilized to expand educational opportunities in the field of aerospace and satellite communications. This research explores both existing and potential ground station architecture options for integration of free-space optical communication downlinks from CubeSats. Future experimentation plans will focus on the application of this capability in more diverse environments to include expanded ground architecture opportunities. Systems engineering design and architecture methods are useful in understanding the current hardware and software options and limitations for future expansion opportunities. By considering a comparable planning approach, alternatives for architecture development can be organized to aid in the identification of control factors for sub-system and ground communication interfaces. As a well-established CubeSat communications system, the existing Mobile CubeSat Command and Control (MC3) architecture serves as an excellent candidate for experimental integration and eventual considerations for a planned proof of concept.Civilian, Naval Information Warfare CenterApproved for public release. Distribution is unlimited
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