By applying holomorphic motions, we prove that a parabolic germ is quasiconformal rigid, that is, any two topologically conjugate parabolic germs are quasiconformally conjugate and the conjugacy can be chosen to be more and more near conformal as long as we consider these germs defined on smaller and smaller neighborhoods. Before to prove this theorem, we use the idea of holomorphic motions to ...

I study the effects of neighborhoods on perceived inequality and preferences for redistribution. Using administrative data universe dwellings real estate transactions in Barcelona (Spain), construct a novel measure local — Local Neighborhood Gini (LNG). The LNG is based spatial distribution housing within city, independent boundaries, building-specific. elicit perceptions redistribution from an...

Flexibility of management is an important requisite for access control systems as it allows users to adapt the access control system in accordance with practical requirements. This paper builds on earlier work where we defined administrative policies for a general class of RBAC models. We present a formal definition of administrative refinement and we show that there is an ordering for administ...

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In this paper, we introduce the subclass R b (A,B, α, μ) which is defined by concept of subordination. According to this, we obtain a necessary and sufficient condition which is equivalent to this class. Further, we apply to the δ− neighborhoods for belonging toR b (A,B, α, μ) to this condition.

BACKGROUND We examined the relationship between overweight in preschool children and three environmental factors--the proximity of the children's residences to playgrounds and to fast food restaurants and the safety of the children's neighborhoods. We hypothesized that children who lived farther from playgrounds, closer to fast food restaurants, and in unsafe neighborhoods were more likely to b...

Abstract The identification of territorial clusters where the population suffers from worse health conditions is an important topic in social epidemiology, order to identify inequalities cities and provide policy interventions. This objective particularly challenging because mechanism self-selection individuals into neighborhoods, which causes selection bias. aim this paper consists neighborhoo...