Comunitats en xarxes complexes: detecció i centralitat

En aquest treball estudiem l'estructura de comunitats en xarxes complexes. S'anomenen xarxes complexes als grafs construïts a partir de dades empíriques complint una sèrie de propietats, i s'entén per comunitat en un xarxa complexa, en línies generals, a una part del graf on la densitat de connexions és més gran que a la resta del graf. En una primera part del treball es comparen quatre algoritmes de detecció de comunitats diferents, i en la segona s'estudia la correlació entre la proporció d'arestes internes i externes a la comunitat d'un node, i la seva centralitat segons diverses mesures

Comunitats en xarxes complexes: detecció i centralitat

En aquest treball estudiem l'estructura de comunitats en xarxes complexes. S'anomenen xarxes complexes als grafs construïts a partir de dades empíriques complint una sèrie de propietats, i s'entén per comunitat en un xarxa complexa, en línies generals, a una part del graf on la densitat de connexions és més gran que a la resta del graf. En una primera part del treball es comparen quatre algoritmes de detecció de comunitats diferents, i en la segona s'estudia la correlació entre la proporció d'arestes internes i externes a la comunitat d'un node, i la seva centralitat segons diverses mesures

South African Society and Cuban Medical Collaboration during Nelson Mandela Government

The present work constitutes a brief historical review of the reality South African and the Cuban medical collaboration during Nelson Mandela government, with the objective of analyzing the influence of the politicians of Mandela's government in the social transformations with the competition of the doctor-Cuban collaboration. During the African National Congress, Mandela assumes the address of the country; it is big economic and social difficulties among those that the few doctors highlight for inhabitants. The government begins to improve the material conditions of the town. In this context diplomatic relationships settled down and agreements were signed for the Cuban medical collaboration in that country. An integration of the collaborators existed with the mass of workers of the centers of health. The Cuban experience in South African gave positive results mainly in the native population, since it was guaranteed during this period the health of the town

Sesión Doble : Karla Nahuelpan (GRAFO-UAB) y Alexi Quintana (Northeastern University)

Conferències impartides per Karla Nahuelpan (GRAFO-UAB) i Alexi Quintana (Northeastern University) el 14 de decembre de 2022A mediados del siglo XX, comienzan los movimientos sociales indígenas en América, esto tras las políticas asimilacionistas por parte de los Estados-nación. Sin embargo, ya en la década del 90, ciertos movimientos indígenas dieron un vuelvo en su forma de hacer activismo, realizándolo de manera digital. Este hecho ha generado no tan solo mayor visibilización del movimiento indígena, sino que también ha forjado relaciones transnacionales entre organizaciones indígenas con organismos internacionales y ONG's. Este es el caso de la Coordinadora de Organizaciones Indígenas de la Cuenca Amazónica, quienes han hecho de lo digital una herramienta para el activismo indígenaThe structure of ties among users of a Social Media platform strongly conditions the content users see and experience on the site. In particular, the extent that relationships on the platform are segregated based on attributes such as partisanship has important implications for how information flows on it. This talk presents an analysis of homophily in following relationships on Twitter for a sample of 1.1 million U.S. users matched to administrative data, including age, race/ethnicity, sex, location, and partisanship information. We look at how these variables are associated with having a tie on Twitter and find geographical distance to be the most important variable. In contrast, partisanship homophily is not as relevant as concerns over polarization generally impl

The COVID States Project #10: The pandemic and the protests

A multi-wave 50-state COVID-19 survey: https://covidstates.org/ From: The COVID-19 Consortium for Understanding the Public’s Policy Preferences Across States. A joint project of: Northeastern University, Harvard University, Rutgers University, and Northwestern University

The COVID States Project #76: Storming of the Capitol, one year later

The COVID states project conducted a survey and issued a report in the immediate aftermath of the storming of the Capitol building on January 6, 2021. Here, we revisit some of the opinions regarding January 6th, a year later

The COVID States Project #11: Perceptions of school reopening safety in the US

An increasing number of school districts across the United States have announced that they will provide entirely remote learning when school resumes this fall. Others, like New York City, continue to consider alternatives, including hybrid models in which students attend school part-time. While many other countries have succeeded in reopening schools without a resurgence of cases (with some notable exceptions), they reopened in a very different context, with rates of infection in the community far lower than in many places in the United States. On the other hand, the federal government, and some state governments, continue to focus on the importance of reopening. Another complication is the role of teachers’ unions, who have expressed discomfort about their teachers’ safety and their ability to provide a safe environment for students. And among schools already reopening, some students have already tested positive for COVID-19. Parents of school-age children thus confront difficult decisions about their children’s education - decisions that will hinge on whether they believe schools can be made safe. We surveyed 19,058 adults in the 50 U.S. states and the District of Columbia for 2 weeks beginning July 10 and ending July 26, asking about their perception of the safety of returning to school. We also asked a subset of respondents whether they support reopening schools for in-person classes in the fall. We further aimed to understand whether these comfort levels vary depending on rates of infection in their community, and on other attitudes about COVID-19

The COVID States Project #34: Update on holiday gatherings in December 2020

Public health officials have expressed concern that multi-household holiday gatherings might have driven a January surge of COVID-19 cases. As noted in report 31, social distancing behaviors have generally been improving since late October, including in our most recent wave conducted over the holidays. However, the scope of our data collection regarding social distancing, which focused on proximity to others in the 24 hours preceding survey response, might have missed important spikes in proximity around Thanksgiving, Christmas and New Year. Therefore, here we evaluate the responses from a survey conducted between December 16th and January 10th, to a separate question asking whether people had gathered for the holidays in November and December

The COVID States Project #35: Public attitudes towards COVID-19 vaccines

We present a variety of descriptive results on attitudes and beliefs regarding COVID-19 vaccines. We find a notable consensus across population subgroups regarding order of prioritization for receiving vaccines, which roughly aligns with current policies. We additionally find that while there are generally positive attitudes and beliefs regarding vaccines, there are also some negative attitudes and misbeliefs that are especially common within certain demographics (political independents and, to a lesser extent, Republicans; Black respondents; and individuals ages 25-44). The reported results are based on data collected from 24,682 people between December 16, 2020 and January 10, 2021. For these descriptive analyses, we apply survey weights using national benchmarks for race, gender, age, education, Census region, and urbanicity

The COVID States Project #21: Most important problems facing the nation today

Which issues are, or will be, on voters’ minds as they enter the voting booth on or before November 3rd? Candidates Trump and Biden have stressed quite distinct issues throughout the campaign. The Democrat, Joe Biden, has sought to maintain a focus on the President’s handling of the COVID-19 pandemic, claiming that Donald Trump is undermining Americans’ healthcare with his COVID-19 response. He also has accentuated Trump’s efforts to revoke the Affordable Care Act, and the issue of systemic racism. President Trump, the Republican, has emphasized starkly different issues, particularly law and order and the economy, while seeking to avoid focus on the COVID-19 pandemic. But to what extent are the campaigns succeeding in framing the election according to their preferred emphases? In this report, we present results from our September and October survey waves in which we asked respondents to name the most important problems (MIPs) facing the nation. We investigate overall responses, as well as differences across individual states and demographic subgroups