Showing 291 - 300 of 583 Items
Damned If You Do, Damned If You Don't: A Logical Analysis of Moral Dilemmas
Date: 2018-05-01
Creator: Samuel Monkman
Access: Open access
- This project explores the logical structure of moral dilemmas. I introduce the notion of genuine contingent moral dilemmas, as well as basic topics in deontic logic. I then examine two formal arguments claiming that dilemmas are logically impossible. Each argument relies on certain principles of normative reasoning sometimes accepted as axioms of deontic logic. I argue that the principle of agglomeration and a statement of entailment of obligations are both not basic to ethical reasoning, concluding that dilemmas will be admissible under some logically consistent ethical theories. In the final chapter, I examine some consequences of admitting dilemmas into a theory, in particular how doing so complicates assignment of blame.
Hybridization dynamics of a newly discovered parrotfish swarm in the Tropical Eastern Pacific
Date: 2017-05-01
Creator: Robert Barron
Access: Open access
- Hybrid zones and their dynamics are important in the understanding of the genetic basis of reproductive isolation and speciation. This study seeks to investigate the hybridization dynamics of a Scarus hybrid swarm within the Tropical Eastern Pacific (TEP) that includes four phenotypically distinct species: S. perrico, S. ghobban, S. rubroviolaceus, and S. compressus. Genetic and population structure analyses of four nuclear loci and a mitochondrial locus revealed that one of the four species, S. compressus, was the result of two different hybrid crosses: S. perrico ✕ S. rubroviolaceus and S. perrico ✕ S. ghobban. A NewHybrids model indicated that most of the S. compressus samples were F1 hybrids, but 21% of the S. compressus sample was classified as “parentals” which could also be explained by the presence of either F2 hybrids or backcrosses with S. compressus phenotypes, given the relatively low power of the nuclear data set (4 loci) to resolve complex hybrid genotypes. Significant mito-nuclear discordance in all three non-hybrid species is consistent with an evolutionary effect of backcrossing between F1 hybrids and “pure” species. This study reveals a relative ease of hybridization between parrotfish taxa separated by an estimated 4.5 million years of isolation and opens the door to further studies on the potential effects of gene flow across old species boundaries and perhaps the formation of new species by hybrid speciation in a diverse clade of tropical reef fish. Elucidating the nature of potentially “deep” F2 crosses and backcrosses within the TEP Scarus hybrid system will allow us to better understand the effects of hybridization on evolution and speciation on both a micro- and macro-ecological scale.
Tracking photosynthetic seasonality at needle and forest scales in pines experiencing mild winters Access to this record is restricted to members of the Bowdoin community. Log in here to view.
- Restriction End Date: 2025-06-01
Date: 2022-01-01
Creator: Sara Elizabeth Nelson
Access: Access restricted to the Bowdoin Community
The sex specific effects of acute ketamine treatment on parvalbumin and anxiety and depression following early life adversity Access to this record is restricted to members of the Bowdoin community. Log in here to view.
- Restriction End Date: 2025-06-01
Date: 2022-01-01
Creator: Seneca N. Ellis
Access: Access restricted to the Bowdoin Community
Sorption of Cationic Heterocyclic Amines to Soils: Effects of Charge Delocalization and other Factors Access to this record is restricted to members of the Bowdoin community. Log in here to view.
Date: 2023-01-01
Creator: Mariah McKenzie
Access: Access restricted to the Bowdoin Community
Is Faith the Ultimate Divider?: The Intersections Between Religion and Political Behavior in the United States
Date: 2023-01-01
Creator: Ryan Supple
Access: Open access
- This thesis examines the complex relationship between religiosity and voting behavior in the United States. In a country where religion has diminished in importance over time, it seems rather fascinating that it still plays such a large role in the inner-workings of American politics. Chapter One analyzes the varying ways in which scholars have approached emergent political trends between religious groups, particularly with regards to political parties, voting behavior, and government representation. Chapter Two extends this analysis to the American National Election Studies (ANES), a national survey distributed to random samples of Americans during election seasons. The information from the ANES facilitated a more in-depth analysis of how individuals with varying levels of affiliations have interacted with politics, such as ideologies, affiliations, and feelings towards religiously salient political issues. Lastly, Chapter 3 focuses on college-aged students, using both the UCLA's CIRP Freshman Survey and the Bowdoin College Polar Poll, to evaluate how America's educated youth are interacting with politics. These data allowed for a more proper investigation into how a historically unreligious portion of the population interact with religion today, and how this may affect America's religious climate in the future, as students eventually grow into educated professionals and further immerse themselves into politics. Ultimately, this paper suggests that a growing political polarity has coincided with polarization in religion, with two coalitions-- a religious and non religious one moving in opposite directions, thus amounting to further divisions and misunderstandings between the American public.
Reframing Mourning: Liberatory Grief in Post-Tragedy Chinese American Women’s Fiction
Date: 2024-01-01
Creator: Sophia Li
Access: Open access
- My project approaches discussions of Asian American melancholia and mourning with a specific focus on contemporary Chinese American women’s fiction. Scholars such as David Eng, Shinhee Han, and Anne Anlin Cheng have long spotlighted the prevalence of depression among Asian American populations, particularly those with immigrant backgrounds, and they variously adopt psychoanalytic approaches to understand Asian American mental health and intersectional identities. Looking beyond psychoanalytic models, my project focuses on the works of Yiyun Li, Jenny Zhang, and K-Ming Chang to explore diverse forms of post-tragedy positionality. I read the authors paratextually, not only to locate them within legacies of diasporic fiction and intersectional auto-writing but also to highlight their critically self-reflexive authorship. I study novels and characters depicting complex processes of mourning, ultimately proposing a reading that views them not only as resisting complete recovery but as forging pathways toward liberatory grief.
Poverty Ends with a 12 Year Old Girl: Empowerment and the Contradictions of International Development
Date: 2017-05-01
Creator: Meghan Elizabeth Bellerose
Access: Open access
- This thesis argues that international development programs focused on adolescent girls reproduce problematic and contradictory depictions of girls in the global South. Using Girl Effect marketing materials and interviews with INGO staff, I demonstrate that present-day international aid programs center on the neoliberal notion that an empowered adolescent girl holds the unique potential to end global poverty. Through empowerment programs, girls are encouraged to recognize their agency and take personal responsibility for improving the wellbeing of their communities. However, I argue that even as development leaders claim that an empowered adolescent girl is a source of indefatigable strength who can transform her community, they carry a deep conviction that such a feat is not possible without significant Western aid. Despite the empowerment rhetoric that The Girl Effect and related international initiatives espouse, their programs depict adolescent girls in the developing world as vulnerable and oppressed by poverty, local men, and their cultures. Thus, Western donors are called upon to save “Third World” adolescent girls. I argue that these contradictions in the language of international development contribute to the perception of girls in the global South as weak, inferior, and homogenous and lead to the establishment of programs that strengthen inequitable structures and sideline girls’ sexual rights.
Gendered Subjectivity in Refugee Resettlement Processes: From Somalia to Lewiston, ME
Date: 2018-01-01
Creator: Elena Gleed
Access: Open access
- Refugee Resettlement to the United States is a globalized and transnational process of making home. After Somali state collapse in 1991, more than a million displaced people fled to refugee camps across the Kenyan border. Today, over 12,000 Somali people now live in Lewiston, ME, an old mill town located along the Androscoggin River. As refugees are resettled by the United Nations High Commissioner for Refugees they enter a system created over fifty years ago in response to World War II. Using post-colonial and feminist scholarship, this project analyses the “female refugee” subject as she appears in the official discourse of resettlement processes. I trace the historical emergence of this subjectivity from an individual and work-based neoliberal American ethos to non-governmental organizations run by Somali women in Lewiston. Drawing from document analysis and ethnographic interviews, this paper explores the how Somali women are made to be “new American workers” in a process that combines western liberal feminism with ideas of integration and cultural orientation to the United States.
Using data from the LISST-100 to recreate phytoplankton size distribution and processes in Harpswell Sound, Maine
Date: 2014-08-01
Creator: Schuyler Nardelli
Access: Open access
- Phytoplankton are the simple single-celled photosynthesizers that live in the ocean and form the base of the food chain. Cell size is a basic proxy for physiological rates as well as ecosystem structure. Thus, cell size can be used in a model framework to track changing environmental conditions that could potentially lead to harmful algal blooms (HABs, aka “red tides”)—events that can be detrimental to human health, marine life, and fisheries. HABs occur when a single algae (phytoplankton) species either grows unconstrained to a concentration such that it becomes toxic or causes low oxygen concentration in the water. In typical estuaries, less dense freshwater flows towards the ocean, and denser salty seawater flows into the estuary in the subsurface. However, Harpswell Sound is a reverse estuary that receives its freshwater input at its mouth from the upstream Kennebec River. This yields upstream surface low salinity flow and downstream deep high salinity flow. This rare dynamic allows phytoplankton located in the surface of seawater to be retained in the sound in conditions conducive to high growth and HABs, and can be used as a warning for conditions throughout the Gulf of Maine. To study the temporal and spatial dynamics of phytoplankton in the sound, we used the LISST-100, which uses light scattering properties to collect continuous in-situ water column observations of particle concentrations and size distributions. Although the LISST-100 was built to measure sediment size with a spherical shape, studies have been conducted that show it can accurately describe a diverse range of phytoplankton shapes and sizes, provided the population has sufficient size differences and is fairly concentrated, conditions found in Harpswell Sound. Weekly profiles of the water column were collected at the Bowdoin Buoy from 5/21/14-6/18/14, as well as a 20-day continuous time series collected at Bowdoin’s Coastal Studies Center dock from 5/30/14-6/18/14 along with supplementary oceanographic data. We determined that semi-diurnal tidal fluctuations are sufficient to move water masses past the buoy and dock with each tide, thereby connecting them. Phytoplankton were found to be in the 3-50 micron size range, with a peak diameter of approximately 7 microns. Additionally, three independent phytoplankton blooms were observed over the course of the 20-day time series as different water masses flowed through the sound. They were sourced in the oceanic water masses found under the freshened surface layer. Over the five-week period the populations gradually surfaced with their water mass as the overlying freshwater dissipated in the absence of rainfall. The LISST-100 served as a useful tool for determining phytoplankton distribution and dynamics within Harpswell Sound, and with further research there is great potential to continue to increase proficiency with the instrument in order to better understand phytoplankton dynamics and harmful algal blooms. Final Report of research funded by the Rusack Coastal Studies Fellowship.