Sewanee: The University of the South
Sewanee DSpace Repository (The University of the South)Not a member yet
4066 research outputs found
Sort by
Finding the Resistivity of Graphene using the van der Pauw method
No full textThin resistivities of conducting and semiconducting materials were measured. The samples are thin films between 15µm and 50m thick, including aluminum, copper, silicon, and graphene. These included rectangles and squares of uniform thickness, as well as other symmetrical shapes that satisfy Van der Paw’s method. This measurement technique allows a straight-forward method for determining the resistance of a square with a set of specific measurements of the resistance of the thin film. Four contacts were made on the edges of each material and the resistance between any two sets of contacts were used to determine the resistance of the square. From this the resistivity of the material is calculated. Samples included squares, rectangles, and squares with holes. The holes, which violate one important criterium for the Van der Pauw method, have been carefully studied by Chenfei Miao, who modeled them using infinite matrice
JD Franklin Oral History Interview Records
No full textJD Franklin of Sewanee, Tennessee, was interviewed in person by Lizzy Ray, a Sewanee student, on October 31st, 2023. While their conversation was primarily on the Black Lives Matter Movement, other topics included the #BLM on social media and discussions on race within education. We hope that this conversation will assist scholars with a further understanding of race in the United States during the early twenty-first century. Please click on the link to see the full interview.Dr. Andrew Maginn, Visiting Assistant Professor of Histor
Kylie Greer Oral History Interview Record
No full textKylie Greer of Murfreesboro, Tennessee was interviewed by Kaila Seger, a Sewanee student, on November 26th, 2023 in person. While their conversation was primarily on the Black Lives Matter Movement, other topics included reactionary politics in relation to the Black Lives Matter Movement and the future of Black Lives Matter. We hope that this conversation will assist scholars with a further understanding of race in the United States during the early twenty-first century. Please click on the link to see the full interview.Dr. Andrew Maginn, Visiting Assistant Professor of Histor
Gray Nischwitz Oral History Interview Records
No full textGray Nischwitz of Sewanee, Tennessee was interviewed by Stewart Buchanan, a Sewanee student, on November 28th, 2023 in person. While their conversation was primarily on the Black Lives Matter Movement, other topics included how the Black Lives Matter movement has helped to promote unity, and COVID-19’s effect on protests. We hope that this conversation will assist scholars with a further understanding of race in the United States during the early twenty-first century. Please click on the link to see the full interview.Dr. Andrew Maginn, Visiting Assistant Professor of Histor
Victoria Bradley Oral History Interview Records
No full textVictoria Bradley of Atlanta, Georgia was interviewed by Lyberti Bradley, Sewanee student, on November 28, 2023 on Zoom. While their conversation was primarily on the Black Lives Matter Movement, other topics included discussing Victoria Bradley's experience in LA during riots after the death of Trayvon Martin. We hope that this conversation will assist scholars with a further understanding of race in the United States during the early twenty-first century. Please click on the link to see the full interview
Ethan Britt Oral History Interview Records
No full textEthan Britt of Sewanee, Tennessee was interviewed by Stewart Buchanan, a Sewanee student, on November 28th, 2023, in person. While their conversation was primarily on the Black Lives Matter Movement, other topics included talking about race relations in his hometown of Chapel Hill, North Carolina as well as its reaction to the death of George Floyd. We hope that this conversation will assist scholars with a further understanding of race in the United States during the early twenty-first century. Please click on the link to see the full interview
Subalpine forest mortality in the Colorado Rocky Mountains: assessing global change
Full text linkThe Colorado river provides water directly to >40 million Americans in the southwest, and indirectly to millions more, including Sewanee students, through winter agriculture. The Colorado River obtains as much as 75% of its water from snow melt, for which the upper elevation subalpine forests act as an important buffer to variation in precipitation. The summer of 2022 marked Sewanee’s first field campaign to the Rocky Mountain Biological Laboratory in Gothic, Colorado. RMBL is located at an elevation of 9,500 feet, making it an optimal location for cataloging the interannual dynamics and the environmental controls regulating the distribution of subalpine forests. We surveyed 12 40x40 m pre-existing forest plots to assess mortality and forest structure. These sites spanned across several gradients within the East River Watershed, Colorado, including aspect, slope, radiation load, topographic wetness index (TWI) and elevation. The primary tree species in this area are subalpine fir (Abies lasiocarpa), Engelmann spruce (Picea engelmannii), and lodgepole pine (Pinus contorta). We recorded the species, height, diameter at breast height (dbh), crown illumination index (CII), and health status of 5876 trees across all plots. We constructed correlations between these data and the associated topographic variables of each plot. Tree mortality significantly (p<0.01) increased with TWI . Stocking density significantly decreased with an increase in hill slope angle. These findings suggest a relationship between TWI and mortality and between stocking density and hill slope angle, but further data must be collected in order to further support these conclusions. These results are crucial as we face future global climate change, since increased natural disasters and other pressures will affect future tree mortality. This ongoing work will continue to quantify the mortality of subalpine forest along different gradients in order to assess the long term stability of forests within the Colorado River Watershed.The Bran and Cindy Potter Fund, Sewanee’s Department of Earth and Environmental
Systems Gift Fund, The Energy and Resources Group of the University of California—Berkeley, Berkeley Lab, the Watershed Function Scientific Focus Area project, and the Rocky Mountain Biological Societ
William Buchanan Oral History Interview Records
No full textWilliam Buchanan of Dallas, Texas was interviewed by Stewart Buchanan, a Sewanee student, on November 30th, 2023, on Zoom. While their conversation was primarily on the Black Lives Matter Movement, other topics included discussing how the Black Lives Matter movement has influenced law enforcement training. We hope that this conversation will assist scholars with a further understanding of race in the United States during the early twenty-first century. Please click on the link to see the full interview.Dr. Andrew Maginn, Visiting Assistant Professor of Histor
Food Desert and Obesity Rates: Evidence from Washington D.C.
No full textThe high financial and human costs of obesity create an urgency to combat this disease that has been increasing with unceasing relentlessness in the United States since the 1970s. This study investigates food deserts as a key variable affecting individuals’ body mass index (BMI) in the District of Columbia to help understand the connection between food inequity and obesity. We analyze sociodemographic, socioeconomic, and food deserts data in pooled cross-sectional and fixed effects ordinary least squares regressions. The narrowness of our study results in data limitations that leave us unable to determine a statistically significant correlation between living within a food desert and BMI. Our findings contribute to the wider literature on obesity in the United States and broaden our understanding of factors affecting this epidemic.The University of the South; Doctor Aaron Elro