543 research outputs found
Balanced directed cycle designs based on groups
AbstractA balanced directed cycle design with parameters (Ï
, k, λ) is a decomposition of the complete directed multigraph λKÌÏ
into edge disjoint directed cycles CÌk. The paper elaborates on the âdifference methodâ for constructing these designs from groups and obtains some new constructions and classification results for designs with large automorphism groups
Stops and Stares: Street Stops, Surveillance, and Race in the New Policing
The use of proactive tactics to disrupt criminal activities, such as Terry street stops and concentrated misdemeanor arrests, are essential to the ânew policing.â This model applies complex metrics, strong management, and aggressive enforcement and surveillance to focus policing on high crime risk persons and places. The tactics endemic to the ânew policingâ gave rise in the 1990s to popular, legal, political and social science concerns about disparate treatment of minority groups in their everyday encounters with law enforcement. Empirical evidence showed that minorities were indeed stopped and arrested more frequently than similarly situated whites, even when controlling for local social and crime conditions. In this article, we examine racial disparities under a unique configuration of the street stop prong of the ânew policingâ â the inclusion of non-contact observations (or surveillances) in the field interrogation (or investigative stop) activity of Boston Police Department officers. We show that Boston Police officers focus significant portions of their field investigation activity in two areas: suspected and actual gang members, and the cityâs high crime areas. Minority neighborhoods experience higher levels of field interrogation and surveillance activity net of crime and other social factors. Relative to white suspects, Black suspects are more likely to be observed, interrogated, and frisked or searched controlling for gang membership and prior arrest history. Moreover, relative to their black counterparts, white police officers conduct high numbers of field investigations and are more likely to frisk/search subjects of all races. We distinguish between preference-based and statistical discrimination by comparing stops by officer-suspect racial pairs. If officer activity is independent of officer race, we would infer that disproportionate stops of minorities reflect statistical discrimination. We show instead that officers seem more likely to investigate and frisk or search a minority suspect if officer and suspect race differ. We locate these results in the broader tensions of racial profiling that pose recurring social and constitutional concerns in the ânew policing.â
The Infinite Little Box: How Limitations Encourage Creativity
This IQP consists of my work on a Perlenspiel game called Whither which I prototyped during a class taught by Professor Brian Moriarty and a look at how limitations can lead to creativity. The first version of Whither was coded and designed by Ryan Melville and myself and I continued on my own with advice from Professor Moriarty. The game emphasized limitations which opened artistic possibilities. I then researched other arts which also utilized restrictions to inspire their design. I found that limitations often encouraged creativity
An Analysis of the NYPD\u27s Stop-and-Frisk Policy in the Context of Claims of Racial Bias
Recent studies by police departments and researchers confirm that police stop racial and ethnic minority citizens more often than whites, relative to their proportions in the population. However, it has been argued stop rates more accurately reflect rates of crimes committed by each ethnic group, or that stop rates reflect elevated rates in specific social areas such as neighborhoods or precincts. Most of the research on stop rates and police-citizen interactions has focused on traffic stops, and analyses of pedestrian stops are rare. In this paper, we analyze data from 175,000 pedestrian stops by the New York Police Department over a fifteen-month period. We disaggregate stops by police precinct, and compare stop rates by racial and ethnic group controlling for previous race-specific arrest rates. We use hierarchical multilevel models to adjust for precinct-level variability, thus directly addressing the question of geographic heterogeneity that arises in the analysis of pedestrian stops. We find that persons of African and Hispanic descent were stopped more frequently than whites, even after controlling for precinct variability and race-specific estimates of crime participation
2003-2007 Report on Hate Crimes and Discrimination Against Arab Americans
Analyzes rates, patterns, and sources of anti-Arab-American hate crimes and discrimination, including detainee abuse, delays in naturalization, and threats; civil liberties concerns; bias in schools; and defamation in the media. Includes case summaries
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