Showing 2221 - 2230 of 5708 Items
"A Doula Can Only Do So Much": Birth Doulas and Stratification in United States Maternity Care
Date: 2015-05-01
Creator: Kaylee S Wolfe
Access: Open access
Stuck in Limbo: Temporary Protected Status, Climate Migrants and the Expanding Definition of Refugees in the United States
Date: 2021-01-01
Creator: Noelia Calcaño
Access: Open access
- There will be 1.2 billion climate refugees by 2050 as ecological disasters precipitate mass migrations around the world. The U.S. does not legally recognize climate migrants as refugees, instead adhering to the 1951 UN Refugee Convention that limits the definition of a refugee to individuals facing political persecution. Despite failing to expand the definition of a refugee, the U.S. has accommodated migrants displaced by natural disasters through a series of ad hoc fixes, most notably “Temporary Protected Status.” In Central American countries that were granted TPS, we encounter the paradox of the U.S. employing environmental disasters to justify continued extensions of this temporary protection, while addressing chronic conditions in the region. The central question of this thesis is, has employing the environment as a catch-all tool for Temporary Protected Status protection expanded the de facto definition of a “refugee,” for Central American migrants impacted by climate catastrophes and if so, how? Though TPS fills a gap in US law by providing de facto protections to migrants fleeing environmental disasters, the environment is being used as a catch-all tool for more systemic economic and political vulnerabilities in Central America. The environment is a catch-all tool for continued protection only insofar as it is not recognized as political, yet it is getting harder to employ the environment as an apolitical driver of migration. The precarious foundation of TPS threatens the hundreds of thousands of Central Americans that depend on this program to live and work legally in the United States.
Who We Are: Incarcerated Students and the New Prison Literature, 1995-2010
Date: 2013-05-01
Creator: Reilly Hannah N Lorastein
Access: Open access
- This project focuses on American prison writings from the late 1990s to the 2000s. Much has been written about American prison intellectuals such as Malcolm X, George Jackson, Eldridge Cleaver, and Angela Davis, who wrote as active participants in black and brown freedom movements in the United States. However the new prison literature that has emerged over the past two decades through higher education programs within prisons has received little to no attention. This study provides a more nuanced view of the steadily growing silent population in the United States through close readings of Openline, an inter-disciplinary journal featuring poetry, essays, fiction, and visual art created by incarcerated students enrolled in the College Program at San Quentin State Prison. By engaging the first person perspective of the incarcerated subject, this project will reveal how incarcerated individuals describe themselves, how they maintain and create intimate relationships from behind bars, and their critiques of the criminal justice system. From these readings, the project outlines conventions of “the incarcerated experience” as a subject position, with an eye toward further research analyzing the intersection of one's “incarcerated status” with one’s race, class, gender, and sexuality.
A Bayesian hierarchical mixture model with continuous-time Markov chains to capture bumblebee foraging behavior
Date: 2021-01-01
Creator: Max Thrush Hukill
Access: Open access
- The standard statistical methodology for analyzing complex case-control studies in ethology is often limited by approaches that force researchers to model distinct aspects of biological processes in a piecemeal, disjointed fashion. By developing a hierarchical Bayesian model, this work demonstrates that statistical inference in this context can be done using a single coherent framework. To do this, we construct a continuous-time Markov chain (CTMC) to model bumblebee foraging behavior. To connect the experimental design with the CTMC, we employ a mixture model controlled by a logistic regression on the two-factor design matrix. We then show how to infer these model parameters from experimental data using Markov chain Monte Carlo and interpret the results from a motivating experiment.
Cascades and Overexposure in Networks Access to this record is restricted to members of the Bowdoin community. Log in here to view.
Date: 2021-01-01
Creator: Kim Hancock
Access: Access restricted to the Bowdoin Community
Characterizing and Investigating the Electrophysiological Properties of the Plastic Cricket Auditory System in Response to Cooling
Date: 2022-01-01
Creator: Hannah Tess Scotch
Access: Open access
- The auditory system of the Mediterranean field cricket (Gryllus bimaculatus) is capable of profound compensatory plasticity. Following deafferentation due to the loss of an auditory organ, the dendrites of intermediate auditory neuron Ascending Neuron 2 (AN-2) grow across the midline and functionally connect to contralateral afferents. The loss of the auditory organ can be mimicked with reversible cold-deactivation, in which cooled Peltier elements silence the auditory organ and its afferents. Though this would presumably prevent AN-2 from firing, cooling instead induces a novel firing pattern called DOPE (delayed-onset, prolonged-excitation). In this study, intracellular physiological recordings were completed before, during, and after cooling in response to “chirp” and “pulse” sounds. Analysis was performed within and across crickets to characterize DOPE. Results revealed expected variability across individuals, as well as a wider spread of onset delay and a decrease in spike frequency and number of spikes per burst relative to baseline within individuals during cooling. Generally, subsequent warming only partially restored the neuronal responses to baseline as measured by all three parameters. This was particularly true in response to “pulse” stimuli. Future experiments will investigate if DOPE is caused by synaptic inputs or intrinsic properties of AN-2, as well as the role of inhibition in the circuit. Eventually, we hope to develop a complete model of the auditory circuit for future investigations of plasticity, with ramifications for treating human neuronal injury.
Characterizing the Motor Activity Patterns of the Mammalian Thoracic Spinal Cord Neural Network This record is embargoed.
- Embargo End Date: 2027-05-16
Date: 2024-01-01
Creator: Sam McClelland
Access: Embargoed
A histological investigation of Arceuthobium pusillum infections in Picea rubens and Picea glauca
Date: 2024-01-01
Creator: Sade K. McClean
Access: Open access
- Arceuthobium pusillum is a hemiparasite that infects select Picea species. The hosts of A. pusillum do not experience the same symptoms of infection. A. pusillum infections are more fatal to P. marinara, and P. glauca. P. rubens, on the other hand, can survive longer with sustained infection. This presents itself as a contemporary issue because P. glauca, one of the parasite’s most vulnerable hosts, was untethered from ecological competition when old growth forests were subjected to large scale anthropogenic disturbances. These disturbances allowed P. glauca to proliferate, with A. pusillum following. A deeper understanding of the host-species specific responses to A. pusillum infection can broaden general knowledge of parasitic growth and development while also potentially inspiring conservation techniques. This study took advantage of the intrinsic differences between host and parasite to visualize infections in P. rubens and P. glauca, highlighting differences in infection outcome. By illuminating lignin and callose within cross sections of infected P. rubens and P. glauca branches, it was revealed that P. rubens forms dense bands of cells around the cortical strands of infection. These bands form more frequently in P. rubens than in P. glauca and are of a significantly larger area in P. rubens than in P. glauca (t(8), p=0.003, p=0.005). The discovery of the exterior bands is novel and exciting, as the bands are possibly made of callose and potentially facilitate P. rubens survival against A. pusillum infection. The foundational discoveries and results of this study should inspire, and warrant, further analysis.
Are People Blaming Artificial Intelligence More or Less for Incorrect Advice? Access to this record is restricted to members of the Bowdoin community. Log in here to view.
- Restriction End Date: 2029-06-01
Date: 2024-01-01
Creator: Anh Nguyen
Access: Access restricted to the Bowdoin Community