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Accurate and fast path computation is essential for applications such as onboard navigation systems and traffic network routing. While a number of heuristic algorithms have been developed in the past few years for faster path queries, the accuracy of them are always far below satisfying. In this paper, we first develop an agglomerative graph partitioning method for generating high balanced traverse distance partitions, and we constitute a three-level graph model based on the graph partition scheme for structuring the urban road network. Then, we propose a new hierarchical path computation algorithm, which benefits from the hierarchical graph model and utilizes a region pruning strategy to significantly reduce the search space without compromising the accuracy. Finally, we present a detailed experimental evaluation on the real urban road network of New York City, and the experimental results demonstrate the effectiveness of the proposed approach to generate optimal fast paths and to facilitate real-time routing applications. [ABSTRACT FROM AUTHOR]

Over the last five decades, immigration has profoundly transformed the population of metropolitan New York, long divided by race and class. The almost-forgotten 'underclass' debate established that New York was the nation's capital of concentrated poverty, which grew significantly worse during the 1970s and 1980s. Though more recent data show that New York has achieved a remarkable turnaround since 1990, most probably associated with immigration, it remains a city of economic extremes and stubbornly high poverty. Concern about where new immigrants—and their children—might fit into this matrix of urban inequality led several leading social scientists to hypothesise that some members of the second generation would be downwardly mobile. To investigate this possibility, in 1999 and 2000, the Immigrant Second Generation in Metropolitan New York (ISGMNY) surveyed 3,415 young people aged 18 to 32 years, from five immigrant and three native-born racial and ethnic backgrounds, about their life trajectories. This paper conducts an analysis of the contextual effects of the neighbourhoods in which respondents grew up on their later experiences in terms of educational attainment and labour market success. Using OLS and HLM modelling, we find small but consistent and theoretically interesting effects. In particular, growing up in a poor neighbourhood has a negative effect on later outcomes, while growing up in a black neighbourhood does not, once poverty is taken into account. [ABSTRACT FROM AUTHOR]

Neighborhood research, the body of work examining how the built environment affects residents, has been actively pursued across the social sciences in the past decade. Within this work, researchers focus mainly on adult residents and rely on crude census reports to measure the neighborhood space. As there are many problems associated with census data, researchers are currently surveying residents about their perceptions of their neighborhoods. Since young people are not recognized in this research agenda, this paper describes a qualitative study with 10 early adolescents in New York City, aged 11 to 13 years, and their perceptions of their neighborhoods. Results from this study serve as a foundation for quantitative work exploring the relationship between different neighborhood measurements and their association to adolescents' health. [ABSTRACT FROM AUTHOR]

Many have argued that educational research does little to change (and may actually reproduce) the social-structural inequalities shaping the quality of high-poverty urban schools. Building from this premise, this paper asks: How can university-based scholars of urban education do research that encourages, produces, or informs change in urban schools and the conditions that shape them? I examine two broad aspects of urban educational research: the questions we ask and the methods we use. In both cases, I critique the dominant paradigm of technical rationality—one in which school failure is approached as a localized technical problem unveiled through neutral, objective, and experimental research methods. In contrast, I propose a paradigm of “political rationality” (Klees, Rizzini, & Dewees, , Children on the streets of the Americas: homelessness, education and globalization in the United States, Brazil and Cuba. New York: Routledge) that approaches school failure and research practice as political issues situated within and shaped by social relations of power. Innovations in urban education research that reflect the logic of political rationality include: more contextualized and politicized analyses of urban schools, and the expanded use of engaged, collaborative, and participatory research methods. Drawing on this work and my experience implementing a participatory research project, I propose a framework for activist research in urban education, and critically evaluate the limits and possibilities of such work to effect change in urban schools. [ABSTRACT FROM AUTHOR]

This article presents information related to a business meeting. The annual AKD business meeting was held on August 31, 1986, at the New York Hilton. Jerry Michel, scholar at the Memphis State University and AKD President presided the meeting. Those present were: Candace Clark, Helen Clarke, Al Clarke, Ken Davidson, David Demo, Marie Fuller, Rose Helper, Mark Butter, Lyn Lofland, Mike Malec, Betty Maynard, Annabelle Motz, Wayne Seelbach, Don Shoemaker, Jim Skipper, Jim Williams, Kenneth Wilson and Donna Darden. In addition to normal items of business, the following announcements and decisions were made at the meeting. The winners of the 1986 paper competition were as follows First prize: Tracey Watson, Skidmore College, Second prize: Jane Melada, Montclair State and third prize: William Axinn, Cornwell. Watson's paper, "Women Athletes and Athletic Women: The Dilemmas and Contradictions of Managing Incongruent Identities," will be published in the journal "Sociological Inquiry." The Council voted to name Dennis Peck, scholar at the University of Alabama-Bitmingham, as new editor of the journal.

This paper addresses the change associated with the department of social science at Columbia University in the 1920s with particular emphasis on the role of Franklin Giddings. [ABSTRACT FROM AUTHOR]