Showing 5571 - 5580 of 5716 Items
Albert Camus: An Ethical Politics in the Absurd World Access to this record is restricted to members of the Bowdoin community. Log in here to view.
Date: 2015-05-01
Creator: Stephanie Lane
Access: Access restricted to the Bowdoin Community
Regional Identity, Devolution and Ethnic Outbidding: The Rise and Radicalization of Ethnoregionalist Parties in Spain Access to this record is restricted to members of the Bowdoin community. Log in here to view.
Date: 2021-01-01
Creator: Alex Baselga Garriga
Access: Access restricted to the Bowdoin Community
Localizing Resistance: How Southern Women Locate Sexual and Bodily Autonomy and Strategically Resist the Institutions Aiming to Shape Them
Date: 2021-01-01
Creator: Gillian Raley
Access: Open access
- This paper analyzes the methods of resistance enacted by women-identifying people in Mississippi against the institutions seeking to police how they understand their own sexuality and bodily autonomy. This analysis draws upon a series of in-depth, semi-structured interviews conducted in the summer of 2020 focused on construction of community, intersectional identity, relationship with the body, and what inputs frame how women in Mississippi understand sex. This project puts these interviews in conversation with literature from a variety of subfields, including resistance studies, the Sociology of the South, and the Sociology of sexuality, all of which help bring the argument behind these data to light. Resistance looks different in different eras, and generally scholars like to analyze resistance as collective action, collective voice, collective struggle. These data instead argue that strategic, individualized resistance is just as vital to marginalized bodies, particularly when explosive action is not possible. Studying strategies of resistance that lurk beneath the surface not only expands what we now see as “radical,” but it also lends insight into where lasting change can begin.
Analytical tendex and vortex fields for perturbative black hole initial data
Date: 2012-10-26
Creator: Kenneth A. Dennison, Thomas W. Baumgarte
Access: Open access
- Tendex and vortex fields, defined by the eigenvectors and eigenvalues of the electric and magnetic parts of the Weyl curvature tensor, form the basis of a recently developed approach to visualizing spacetime curvature. In particular, this method has been proposed as a tool for interpreting results from numerical binary black hole simulations, providing a deeper insight into the physical processes governing the merger of black holes and the emission of gravitational radiation. Here we apply this approach to approximate but analytical initial data for both single boosted and binary black holes. These perturbative data become exact in the limit of small boost or large binary separation. We hope that these calculations will provide additional insight into the properties of tendex and vortex fields and will form a useful test for future numerical calculations. © 2012 American Physical Society.
Accretion onto endoparasitic black holes at the center of neutron stars
Date: 2021-01-01
Creator: Chloe B Richards
Access: Open access
- We revisit the system consisting of a neutron star that harbors a small, possibly primordial, black hole at its center, focusing on a nonspinning black hole embedded in a nonrotating neutron star. Extending earlier treatments, we provide an analytical treatment describing the rate of secular accretion of the neutron star matter onto the black hole, adopting the relativistic Bondi accretion formalism for stiff equations of state that we presented elsewhere. We use these accretion rates to sketch the evolution of the system analytically until the neutron star is completely consumed. We also perform numerical simulations in full general relativity for black holes with masses up to nine orders of magnitude smaller than the neutron star mass, including a simulation of the entire evolution through collapse for the largest black hole mass. We construct relativistic initial data for these simulations by generalizing the black hole puncture method to allow for the presence of matter, and evolve these data with a code that is optimally designed to resolve the vastly different length scales present in this problem. We compare our analytic and numerical results, and provide expressions for the lifetime of neutron stars harboring such endoparasitic black holes.
Silent Nation: a memoir of sorts This record is embargoed.
- Embargo End Date: 2026-05-20
Date: 2021-01-01
Creator: Mishal Kazmi
Access: Embargoed
RPCH modulation of a multi-oscillator network: Effects on the pyloric network of the spiny lobster
Date: 2001-01-01
Creator: Patsy S. Dickinson, Jane Hauptman, John Hetling, Anand Mahadevan
Access: Open access
- The neuropeptide red pigment concentrating hormone (RPCH), which we have previously shown to activate the cardiac sac motor pattern and lead to a conjoint gastric mill-cardiac sac pattern in the spiny lobster Panulirus, also activates and modulates the pyloric pattern. Like the activity of gastric mill neurons in RPCH, the pattern of activity in the pyloric neurons is considerably more complex than that seen in control saline. This reflects the influence of the cardiac sac motor pattern, and particularly the upstream inferior ventricular (IV) neurons, on many of the pyloric neurons. RPCH intensifies this interaction by increasing the strength of the synaptic connections between the IV neurons and their targets in the stomatogastric ganglion. At the same time, RPCH enhances postinhibitory rebound in the lateral pyloric (LP) neuron. Taken together, these factors largely explain the complex pyloric pattern recorded in RPCH in Panulirus.
Maximally rotating supermassive stars at the onset of collapse: Effects of gas pressure
Date: 2019-09-21
Creator: Kenneth A. Dennison, Thomas W. Baumgarte, Stuart L. Shapiro
Access: Open access
- The ‘direct collapse’ scenario has emerged as a promising evolutionary track for the formation of supermassive black holes early in the Universe. In an idealized version of such a scenario, a uniformly rotating supermassive star spinning at the mass-shedding (Keplerian) limit collapses gravitationally after it reaches a critical configuration. Under the assumption that the gas is dominated by radiation pressure, this critical configuration is characterized by unique values of the dimensionless parameters J/M2 and Rp/M, where J is the angular momentum, Rp the polar radius, and M the mass. Motivated by a previous perturbative treatment, we adopt a fully non-linear approach to evaluate the effects of gas pressure on these dimensionless parameters for a large range of masses. We find that gas pressure has a significant effect on the critical configuration even for stellar masses as large as M ~ 106 MO. We also calibrate two approximate treatments of the gas pressure perturbation in a comparison with the exact treatment, and find that one commonly used approximation in particular results in increasing deviations from the exact treatment as the mass decreases, and the effects of gas pressure increase. The other approximation, however, proves to be quite robust for all masses M >~ 104 MO.