In this paper we present a new approach to create neighbor lists with strict memory bounds for incompressible Smoothed Particle Hydrodynamics (SPH) simulations. Our proposed approach is based on a novel efficient predictive-corrective algorithm that locally adjusts particle support radii in order to yield neighborhoods of a user-defined maximum size. Due to the improved estimation of the initia...

The present study (a) tests main and moderational effects of neighborhood and family risk, and adolescent impulsivity on the development of male and female antisocial behavior (ASB) and (b) examines the extent to which these effects work indirectly through parental knowledge. Adolescents (N = 4,597; 51% male) reported on informal social control in their neighborhoods, their family types, and im...

Abstract Safety net programs, common in settings with high informality like Latin America, often use a means test to establish eligibility. We ask: which organized crime provides lucrative opportunities the informal market, will discouraging formal employment via benefits eligibility criteria increase criminal enterprise activity? link administrative socioeconomic microdata universe of arrests ...

The purpose of this note is to state a collection of results, all related to questions of uniqueness of smooth neighborhoods of finite complexes as imbedded (nicely) in differentiable manifolds. The reported results will appear in subsequent papers, the first of which is [l ]. The approach taken is always via the theory of simple homotopy types (due to J. H. C. Whitehead), and the main theorem ...

living in satisfying urban environments is important for an individual’s well-being. in order to create such environments, planners, designers, and policy makers need to understand the structures that cause residents to feel satisfied with their environments. this paper focuses on the perceived quality of urban residential environments: dwellings and neighborhoods. first, literature review was ...

Abstract Social networks amplify inequalities by fundamental mechanisms of social tie formation such as homophily and triadic closure. These forces sharpen segregation, which is reflected in fragmented network structure. Geographical impediments distance physical or administrative boundaries also reinforce segregation. Yet, less known about the joint relationships between structure, urban geogr...

We construct a maximal function associated with family of skewed cylinders. These cylinders, which are defined as tubular neighborhoods trajectories mollified flow, appear in the study fluid equations such Navier-Stokes and Euler equations. define subordinate to these show it is weak type $(1, 1)$ strong $(p, p)$ by covering lemma. As an application, we give alternative proof for higher derivat...