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Pair Formation in Insect Swarms Driven by Adaptive Long-Range Interactions
No full textIn swarms of flying insects, the motions of individuals are largely uncoordinated with those of their neighbours, unlike the highly ordered motion of bird flocks. However, it has been observed that insects may transiently form pairs with synchronized relative motion while moving through the swarm. The origin of this phenomenon remains an open question. In particular, it is not known if pairing is a new behavioural process or whether it is a natural by-product of typical swarming behaviour. Here, using an ‘adaptive-gravity’ model that proposes that insects interact via long-range gravity-like acoustic attractions that are modulated by the total background sound (via ‘adaptivity’ or fold-change detection) and that reproduces measured features of real swarms, we show that pair formation can indeed occur without the introduction of additional behavioural rules. In the model, pairs form robustly whenever two insects happen to move together from the centre of the swarm (where the background sound is high) towards the swarm periphery (where the background sound is low). Due to adaptivity, the attraction between the pair increases as the background sound decreases, thereby forming a bound state since their relative kinetic energy is smaller than their pair-potential energy. When the pair moves into regions of high background sound, however, the process is reversed and the pair may break up. Our results suggest that pairing should appear generally in biological systems with long-range attraction and adaptive sensing, such as during chemotaxis-driven cellular swarming
The Attack on Blackness in Fashion
Get PDFThis paper identifies specific and general instances of anti-black sentiment in the fashion industry across the Western world, in order to demonstrate how the actions and rhetoric of this industry equates to an all out assault on blackness and black culture, despite the contemporary acceptance and commodification of some of its elements. Next, an analysis is conducted into the overall effect this trend has on black life and psyche in today’s world. Finally, the paper suggests specific changes that must be made in order to reverse and correct this trend
African American Disparities within the Medical World
Get PDFThere are many challenges that African Americans face and the lack of quality in care towards African Americans is an ongoing problem. Black men and women are not given the same care compared to their white counterparts. African Americans are faced with numerous disparities in the medical world. This can exist due to factors that are out of their control such as; failure of medical professionals recognizing the sociocultural differences, distrust in the health care system, cultural differences in understanding and explaining illness, history of hospital and medical office segregation, and knowledge of available services. It is very unlikely to eliminate social inequalities in health care but educating the people about this is important. Colorblindness is not always the answer because people need to be seen for who they are because someone’s background can determine certain health statuses
Airbnb, Short-Term Rentals and the Future of Housing
No full textHow do Airbnb and short-term rentals affect housing and communities? Locating the origins and success of Airbnb in the conditions wrought by the 2008 financial crisis, the authors bring together a diverse body of literature and construct case studies of cities in the US, Australia and Germany to examine the struggles of local authorities to protect their housing and neighborhoods from the increasing professionalization and commercialization of Airbnb.
The book argues that the most disruptive impact of Airbnb and short-term rentals has been on housing and neighborhoods in urban centers where housing markets are stressed. Despite its claims, Airbnb has revealed itself as platform capitalism, incentivizing speculation in residential housing. At the heart of this trajectory is its business model and control over access to data. In a first narrative, the authors discuss how Airbnb has institutionalized short-term rentals, consequently removing long-term rentals, contributing to rising rents and changing neighborhood milieus as visitors replace long-term residents. In a second narrative the authors trace the transformation of short-term rentals into a multibillion-dollar hybrid real estate sector promoting a variety of flexible tenure models. While these models provide more options for owners and investors, they have the potential to undermine housing security and exacerbate housing inequality.
While the overall effects have been similar across countries and cities, depending on housing systems, local response has varied from less restrictive in Australia to increasingly restrictive in the United States and most restrictive in Germany. Although Airbnb has made some concessions, it has not given any city the data needed to efficiently enforce regulations, making for costly externalities. Written in a clear and direct style, this volume will appeal to students and scholars in Urban Studies, Urban Planning, Housing and Tourism Studies.https://cupola.gettysburg.edu/books/1169/thumbnail.jp
APPC Minutes - April 14, 2020
No full textMinutes of the Academic Policy and Program Committee Meeting, April 14, 2020
Faculty Meeting Minutes - April 16, 2020.
Get PDFMinutes of the Gettysburg College Faculty Business Meeting, April 16, 2020
Faculty Meeting Minutes - April 30, 2020
Get PDFMinutes of the Gettysburg College Faculty Business Meeting, April 30, 2020
How Wendy Red Star Decolonizes the Museum with Humor and Play
Get PDFMuseums play a prominent role in crafting racial narratives in the United States, and as evidenced by recent social uprisings, these institutions have come under scrutiny. Take, for example, the statue outside the American Museum of Natural History in New York, which depicts U.S. President Theodore Roosevelt on horseback flanked by a Black man and an American Indian, both unnamed. As National Public Radio reported in June 2020, “The statue was intended to pay homage to Roosevelt as a ‘devoted naturalist and author of works on natural history,’” but, in calling for its removal, Mayor Bill de Blasio’s office affirmed that it “explicitly depicts Black and Indigenous people as subjugated and racially inferior.” [excerpt
The Flowering of Ecology: Maria Sibylla Merian\u27s Caterpillar Book
Get PDFThe Flowering of Ecology presents an English translation of Maria Sibylla Merian’s 1679 ‘caterpillar’ book, Der Raupen wunderbare Verwandelung und sonderbare Blumen–Nahrung. Her processes in making the book and an analysis of its scientific content are presented in a historical context. Merian raised insects for five decades, recording the food plants, behavior and ecology of roughly 300 species. Her most influential invention was an \u27ecological\u27 composition in which the metamorphic cycles of insects (usually moths and butterflies) were arrayed around plants that served as food for the caterpillars. Kay Etheridge analyzes the 1679 caterpillar book from the viewpoint of a biologist, arguing that Merian’s study of insect interactions with plants, the first of its kind, was a formative contribution to natural history.https://cupola.gettysburg.edu/books/1170/thumbnail.jp
Women’s Participation and Globalization
Get PDFWhat effect does women’s participation in national legislatures have on the levels of globalization, specifically economic and social globalization? I contend that women’s participation in national legislatures will have differing effects on economic and social globalization. I expect that higher levels of women’s participation in national legislatures will have a negative effect on levels of economic globalization and a positive effect on levels of social globalization. I demonstrate the plausibility of these relationships through an analysis of 194 countries between the years 1990 and 2017. Interestingly, my findings suggest that women’s participation in national legislatures has a positive and statistically significant impact on both economic and social globalization