Anonymous database search protocols allow users to query a database anonymously. This can be achieved by letting the users form a peerto-peer community and post queries on behalf of each other. In this article we discuss an application of combinatorial configurations (also known as regular and uniform partial linear spaces) to a protocol for anonymous database search, as defining the key-distri...

BACKGROUND The probable coexistence of two or more epidemiological profiles in urban Africa is poorly documented. In particular, very few studies have focused on the comparison of cause-specific mortality between two types of neighborhoods that characterize contemporary southern cities: formal neighborhoods, that is, structured or delineated settlements (planned estates) that have full access t...

Acidification and eutrophication are two environmental impacts that have a significant effect on air pollution human health. The quantitative analysis of these remains hitherto unknown at the scale new neighborhoods. main objective this study is to evaluate, analyze compare acidification potentials one neighborhood initially located in Belgium. For making comparison, was built 149 other countri...

We study the minimum total weighted completion time problem on parallel machines, which is known to be strongly NP-hard. We develop general ideas leading to exponential neighborhoods in which the best improving neighbor can be determined by calculating a maximum weighted matching of an improvement graph. In a second step we introduce neighborhoods that form the base for the exponential neighbor...

OBJECTIVES The health consequences of neighborhood poverty are a public health problem. Data were obtained to examine links between neighborhood residence and mental health outcomes. METHODS Moving to Opportunity was a randomized, controlled trial in which families from public housing in high-poverty neighborhoods were moved into private housing in near-poor or nonpoor neighborhoods, with a s...