Showing 441 - 450 of 583 Items
Directed interactions during episodic memory Access to this record is restricted to members of the Bowdoin community. Log in here to view.
- Restriction End Date: 2025-06-01
Date: 2020-01-01
Creator: Rhianna J Patel
Access: Access restricted to the Bowdoin Community
An Ode to the Birth Justice Movement Birthing, Battling, Being: Black Access to this record is restricted to members of the Bowdoin community. Log in here to view.
Date: 2020-01-01
Creator: Eskedar Girmash
Access: Access restricted to the Bowdoin Community
Investigating enhancer regulation through chromatin conformation in Drosophila Access to this record is restricted to members of the Bowdoin community. Log in here to view.
Date: 2020-01-01
Creator: Hannah D. Konkel
Access: Access restricted to the Bowdoin Community
Applying IsoTaG to understand Helicobacter pylori’s glycoprotein biosynthesis Access to this record is restricted to members of the Bowdoin community. Log in here to view.
Date: 2021-01-01
Creator: Chiamaka Doris Okoye
Access: Access restricted to the Bowdoin Community
Promises Unfulfilled: Integration and Segregation in Metropolitan Philadelphia Public Schools, 1954-2009
Date: 2021-01-01
Creator: Nina Nayiri McKay
Access: Open access
- Even though Brown v. Board of Education outlawed segregation in public schools in 1954, many American children still attend schools that are racially and, increasingly, socioeconomically segregated. Philadelphia, a northern city that did not have an explicit policy of segregating children on the basis of race when Brown was decided, nevertheless still has entrenched residential segregation that replicates in public schools. The metropolitan area became a segregated space in the years around World War II, when housing discrimination, employment discrimination, lending discrimination, suburbanization, and urban renewal started the years-long trajectory of growing white suburbs surrounding an increasingly non-white and under-resourced urban core. These patterns had profound implications for school segregation, which city organizers began trying to fight shortly after Brown v. Board. However, the first court case to take on segregation in Philadelphia schools—Chisholm v. The Board of Education—was largely unsuccessful, with overburdened NAACP and ally lawyers struggling to meet the judge’s expectations of concrete proof of an intent to segregate on the School District of Philadelphia’s part. In the early 1960s, though, the state’s Human Relations Commission obtained a legislative mandate to take on school desegregation. It won its first integration victory in the Pennsylvania port city of Chester before moving to Philadelphia, where it pushed for school integration from 1968 to 2009. The city’s political and ideological battles over those decades reflect national trends around the rise of conservatism and neoliberalism in suburban politics and school reform, limiting the possibilities for change.
When is Change Possible? Presidential Power as Shaped by Political Context, Constitutional Tools, and Legislative Skills
Date: 2021-01-01
Creator: Ryan Telingator
Access: Open access
- Many Americans believe that the president is an omnipotent figure who can achieve any political or policy objective if they try hard enough. On the contrary, the presidency was intentionally crafted by the Framers of the Constitution to have limited legislative powers to mitigate the risk of despotism. Thus, this paper seeks to answer the question, when is change possible?, to try to bridge the gap between popular belief and Constitutional powers. Three questions guide this research: 1) What conditions are conducive for change? 2) What Constitutional tools help a president facilitate change? And 3) What skills can a president bring to office to help create change? This thesis seeks to answer these questions by reviewing the existing literature on political context, tools, and legislative skills. Case study analyses of the Lyndon Johnson and Ronald Reagan presidencies are then presented to assess their legislative successes and failures, and the factors behind them. Finally, the thesis concludes by evaluating President Joseph Biden’s first 100 days in office and uses the theory and findings from the cases to predict Biden’s ability to affect change. This research reveals that the political context is the most important factor in determining the possibility of change – successful change relies on open policy windows, resilient ideological commitments, and a mandate to stimulate congressional action. Within the constraints of the case studies, Constitutional tools were not important. Legislative skills helped to pass legislation, however, they were not potent enough to overcome a bad political context.
Characterizing the exhumation path of the first ultrahigh-pressure terrane in North America Access to this record is restricted to members of the Bowdoin community. Log in here to view.
Date: 2015-05-01
Creator: Zachary FM Burton
Access: Access restricted to the Bowdoin Community
An AGN as a Counterpart for Neutrino Event IceCube-220303A
Date: 2024-01-01
Creator: Nur Schettino
Access: Open access
- Cosmic rays have been detected for over a century. While some sources have been confirmed, they cannot explain the high energy of the particles (> 10^15 eV), so it remains unclear where and how they are accelerated to extreme energies. The study of astrophysical high-energy neutrinos may help solve the puzzle. These neutrinos are produced by cosmic rays interacting with other charged particles or photons. Moreover, while cosmic rays do not reveal their sources of origin because they can be deflected by magnetic fields, cosmic neutrinos detected by the IceCube Observatory can be traced back to their sources of origin. We will consider an active galactic nucleus (AGN) as a candidate source for a high-energy neutrino.This thesis examines the AGN WISEA J175051.31+105645.3 as a potential source for IceCube-220303A, a high-energy neutrino with a 78% probability of being astrophysical in origin. Using follow-up NuSTAR and Swift/XRT observations, WISEA J175051.31+105645.3 was the only viable source we found in IceCube-220303A’s uncertainty region. We used follow-up X-ray data to construct a multi-wavelength spectral energy distribution (SED) through which we calculated the AGN’s neutrino energy flux. This calculation yields the number of neutrinos we would expect to detect from the AGN in a given time period. We used this number to calculate the probability that IceCube-220303A was emitted by WISEA J175051.31+105645.3. Finding a statistically significant link between IceCube-220303A and WISEA J175051.31+105645.3 may help us better understand what processes can accelerate particles like cosmic rays to extreme energies and learn more about AGN.
Modulation of the stretch feedback pathway in the cardiac neuromuscular system of the American lobster, Homarus americanus
Date: 2024-01-01
Creator: Karin van Hassel
Access: Open access
- The cardiac ganglion (CG) is a central pattern generator, a neural network that, when activated, produces patterned motor outputs such as breathing and walking. The CG induces the heart contractions of the American lobster, Homarus americanus, making the lobster heart neurogenic. In the American lobster, the CG is made up of nine neurons: four premotor pacemaker neurons that send signals to five motor neurons, causing bursts of action potentials from the motor neurons. These bursts cause cardiac muscle contractions that vary in strength based on the burst duration, frequency, and pattern. The activity of the CG is modulated by feedback pathways and neuromodulators, allowing for flexibility in the CG’s motor output and appropriate responses to changes in the animal’s environment. Two feedback pathways modulate the CG motor output, the excitatory cardiac muscle stretch and inhibitory nitric oxide feedback pathways. Despite our knowledge of the modulation of the CG by feedback pathways and neuromodulators separately, little is known about how neuromodulators influence the sensory feedback response to cardiac muscle stretch. I found one neuromodulator to modulate each phase of the stretch response differently, one neuromodulator to generally not affect the stretch response, and three neuromodulators to suppress the stretch response. These results suggest neuromodulators can act to produce flexibility in a CPG’s motor output, allowing the system to respond appropriately to changes in an organism’s environment, and allow for variation in CPG responses to different stimuli.
Sexual Knowledge in Late-Colonial Bombay: Contested Authority, Politicized Sciences
Date: 2022-01-01
Creator: Rahul Prabhu
Access: Open access
- Sexuality was at the fulcrum of various issues facing late-colonial India from social reform projects such as child marriage, women’s rights and birth control to concerns of socioeconomic, physical and sexual weakening. The question of sexual modernity became implicated in imaginations of the modern post-colonial nation, setting the stage for a period of energized, linguistically plural projects of sexual knowledge production. While science was used to authorize such projects in the West, where could authority be located in a context where science held plural meaning and authority itself was highly contested? This paper asks how scientific authority was understood, deployed and shaped by the eugenics project of Narayan Sitaram Phadke (1894-1978) and the sexology project of A.P. Pillay (1890-1956). This thesis argues that the mechanics of each figures’ utilization of science captures how the interaction between scientific authority and society was understood by Phadke and Pillay in different ways. While both figures subscribed to the idea that science was universally authoritative in the making of sexual modernity, Phadke’s and Pillay’s projects show the plurality in how science was understood by social reformers. Furthermore, the thesis presents the differences between Phadke’s and Pillay’s projects as a product of the larger movements – British-era birth control advocacy, Hindu nationalism, upper-caste marriage reform and global sexology – that Phadke and Pillay were distinctly invested in or separated from. Scientific authority and the mechanics of its use is proposed as a vivid lens into the complex dynamics of modernization in late-colonial India.