Showing 4041 - 4050 of 5713 Items
Political advertising and persuasion in the 2004 and 2008 presidential elections
Date: 2010-03-01
Creator: Michael M. Franz, Travis N. Ridout
Access: Open access
- The 2008 presidential election was historic in many respects. The campaign included the first African American major-party candidate, and neither candidate was an incumbent president or vice president. In addition, one candidate took public funding and the other candidate did not. This latter disparity resulted in an imbalance of resources across the two campaigns, especially in the purchase of political advertising. But did that imbalance matter for who won? Did advertising move voters, and if so, by how much? This article examines patterns of presidential ad buys in 2008 and compares them with presidential ad buys in 2004. It also examines the impact of advertising on county-level vote returns in both years. The results demonstrate some important differences in advertising patterns across years, especially in terms of ad sponsorship and market-level advertising advantages. We also find significant and strong advertising persuasion effects in 2008. © The Author(s) 2010.
Commercial plant production and consumption still follow the latitudinal gradient in species diversity despite economic globalization
Date: 2016-10-01
Creator: Erik J. Nelson, Matthew R. Helmus, Jeannine Cavender-Bares, Stephen Polasky, Jesse R., Lasky, Amy E. Zanne, William D. Pearse, Nathan J.B. Kraft, Daniela A. Miteva
Access: Open access
- Increasing trade between countries and gains in income have given consumers around the world access to a richer and more diverse set of commercial plant products (i.e., foods and fibers produced by farmers). According to the economic theory of comparative advantage, countries open to trade will be able to consume more-in termsof volume and diversity-if they concentrate production on commodities that they can most cost-effectively produce, while importing goods that are expensive to produce, relative to other countries. Here, we performa global analysis of traded commercial plant products and find little evidence that increasing globalization has incentivized agricultural specialization. Instead, a country's plant production and consumption patterns are still largely determined by local evolutionary legacies of plant diversification. Because tropical countries harbor a greater diversity of lineages across the tree of life than temperate countries, tropical countries produce and consume a greater diversity of plant products than do temperate countries. In contrast, the richer and more economically advanced temperate countries have the capacity to produce and consume more plant species than the generally poorer tropical countries, yet this collection of plant species is drawn from fewer branches on the tree of life. Why have countries not increasingly specialized in plant production despite the theoretical financial incentive to do so? Potential explanations include the persistence of domestic agricultural subsidies that distort production decisions, cultural preferences for diverse local food production, and that diverse food production protects rural households in developing countries from food price shocks. Less specialized production patterns will make crop systems more resilient to zonal climatic and social perturbations,but this may come at the expense of global crop production efficiency, an important step in making the transition to a hotter and more crowded world.
AF/AM/50 Oral History Project
- In the fall of 2019, students (Nate DeMoranville ‘20, Aisha Rickford ‘20, Marina Henke ‘19) conducted the AF/AM/50 Oral History Project to commemorate the 50th anniversary of the Africana Studies Program at the College. Over the course of the weekend, they interviewed more than 30 alumni, past professors, and staff. Interviewees varied across many spectrums: black and white, old and young. Some had not been back to Bowdoin for more than a decade. Others still lived in Brunswick. While in no way entirely encompassing the experience of black students at Bowdoin or the history of the Africana Studies Program, this project aimed to provide a window into the lives of a select few. These selections are not representative. No path through Bowdoin was identical. Hopes for the future of the College ranged widely. Themes and topics certainly emerged: of isolation, of prejudice, of pushback, but also of friendship and resilience.
Carbon credits compete poorly with agricultural commodities in an optimized model of land use in Northern California
Date: 2016-11-01
Creator: Erik Nelson, Virginia Matzek
Access: Open access
- Nascent US carbon markets reward farmers for reforesting agricultural land, with consequent ecological co-benefits. We use a dynamic optimization model to determine the likelihood of an orchard farmer in northern California converting to forest under 90 plausible future scenarios. We find reforestation to be a highly unlikely outcome, occurring only 4.0% of the time under current economic, biophysical, and policy conditions, and only 18.5% of the time under a set of assumptions that make carbon offset production more economically viable. Conversion to "carbon farming" was more sensitive to changes in orchard production costs and yields than to carbon offset policy changes. In the absence of other changes, the price of a carbon offset would have to increase nearly a hundredfold to make reforestation compete economically with orchard agriculture. Our results partly explain low participation in the reforestation sector of US carbon markets. We conclude that farmers will not be interested in forest conversion unless their land has limited agricultural potential or they are motivated by social, rather than economic, rewards.
Medals and Plaquettes from the Molinari Collection at Bowdoin College
Date: 1976-01-01
Creator: Andrea S. Norris, Ingrid S. Weber
Access: Open access
- Catalogue of the exhibition of medals. With an introduction to the medals catalogue by Graham Pollard. "Typographic composition and letterpress printing by the Anthoensen Press, Portland, Maine"--T.p. verso
SR-Like RNA-binding protein Slr1 affects Candida albicans filamentation and virulence
Date: 2013-04-01
Creator: Chaiyaboot Ariyachet, Norma V. Solis, Yaoping Liu, Nemani V. Prasadarao, Scott G., Filler, Anne E. McBride
Access: Open access
- Candida albicans causes both mucosal and disseminated infections, and its capacity to grow as both yeast and hyphae is a key virulence factor. Hyphal formation is a type of polarized growth, and members of the SR (serine-arginine) family of RNA-binding proteins influence polarized growth of both Saccharomyces cerevisiae and Aspergillus nidulans. Therefore, we investigated whether SR-like proteins affect filamentous growth and virulence of C. albicans. BLAST searches with S. cerevisiae SR-like protein Npl3 (ScNpl3) identified two C. albicans proteins: CaNpl3, an apparent ScNpl3 ortholog, and Slr1, another SR-like RNAbinding protein with no close S. cerevisiae ortholog. Whereas ScNpl3 was critical for growth, deletion of NPL3 in C. albicans resulted in few phenotypic changes. In contrast, the slr1δ/δ mutant had a reduced growth rate in vitro, decreased filamentation, and impaired capacity to damage epithelial and endothelial cells in vitro. Mice infected intravenously with the slr1δ/δ mutant strain had significantly prolonged survival compared to that of mice infected with the wild-type or slr1δ/δ mutant complemented with SLR1 (slr1δ/δ+SLR1) strain, without a concomitant decrease in kidney fungal burden. Histopathology, however, revealed differential localization of slr1δ/δ hyphal and yeast morphologies within the kidney. Mice infected with slr1δ/δ cells also had an increased brain fungal burden, which correlated with increased invasion of brain, but not umbilical vein, endothelial cells in vitro. The enhanced brain endothelial cell invasion was likely due to the increased surface exposure of the Als3 adhesin on slr1δ/δ cells. Our results indicate that Slr1 is an SR-like protein that influences C. albicans growth, filamentation, host cell interactions, and virulence. © 2013, American Society for Microbiology.