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41.
The association between neighbourhood walkability and children's independent mobility using an ecological approach is relatively unexplored. In 2007, 1480 10- to 12-year-old children (and 1314 parents) attending low and high walkable schools across Perth, Western Australia, completed surveys. Objective built environment, social-cultural and individual-level factors were explored. High neighbourhood walkability predicted girls' independent mobility. However, girls and boys were more likely to be independently mobile if they and their parents were confident that they could travel independently. Providing safe, walkable neighbourhoods – particularly for girls – combined with strategies to improve children's skills to safely navigate their neighbourhood may increase independent mobility.  相似文献   
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This study focuses on integration processes in European Research and Development (R&D) by analyzing the spatiotemporal dimension of three different R&D collaboration networks across Europe. The studied networks cover different types of knowledge creation, namely project‐based R&D networks within the European Union (EU) Framework Programmes (FPs), co‐patent networks, and co‐publication networks. Integration in European R&D—one of the main pillars of the EU Science Technology and Innovation policy—refers to the harmonization of fragmented national research systems across Europe and to the free movement of knowledge and researchers. The objective is to describe and compare spatiotemporal patterns at a regional level and to estimate the evolution of separation effects over the time period 1999–2006 that influence the probability of cross‐region collaborations in the distinct networks under consideration. The study adopts a spatial interaction modeling perspective, econometrically specifying a panel generalized linear model relationship, taking into account spatial autocorrelation among flows using eigenfunction spatial filtering methods. The results show that geographical factors are a lower hurdle for R&D collaborations in the FP networks than in co‐patent networks and co‐publication networks. Furthermore, it is shown that the geographical integration is higher in the FP network.  相似文献   
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ABSTRACT This paper analyses the evolution of city size distribution in the United States throughout the twentieth century. It tests the validity of two empirical regularities studied in urban economics: Zipf's law (the rank‐size rule), and Gibrat's law, or the law of proportionate growth. The main contribution of this work is the use of a new database with information on all the cities (understood as incorporated places), without size restrictions. Our results enable us to confirm that Gibrat's law holds (weakly), and that Zipf's law holds only if the sample is sufficiently restricted at the top, not for a larger sample.  相似文献   
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Abstract.  We investigate the ( r ∣ X p )‐medianoid problem for networks. This is a competitive location problem that consists of determining the locations of r facilities belonging to a firm in order to maximize its market share in a space where a competitor is already operating with p facilities. We consider six scenarios resulting from the combination of three customer choice rules (binary, partially binary, and proportional) with two types of services (essential and unessential).
Known discretization results about the existence of a solution for the set of nodes are extended. Some examples and computational experience using heuristic algorithms are presented.  相似文献   
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African Archaeological Review - This study focuses on the chronostratigraphic sequence of the Cave of Kaf Taht el-Ghar (Dar Ben Karrich, Tétouan, Morocco) excavated in 2012 in the framework of...  相似文献   
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For children and young people in street situations, to give up street life is easier said than done. The study reported in this article aims to contribute to the field of children and young people in street situations by introducing the voices of parents whose daughters live on the streets. In biographical narrative interviews, we asked parents together with street educators from Bolivia to share their stories of girls entering and leaving street life. Our findings showed that a child's act of running away made parents aware about their parenting, leading to new openings and possible renewed social bonds with their children. At the same time, street educators’ stories exposed the importance of the family support during the process of exiting street life. Nevertheless, even though parents no longer want to stand on the sidelines, the stories also revealed that parents are still forgotten throughout interventions with street children in Bolivia.  相似文献   
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ABSTRACT

This article reviews selected contemporary theoretical approaches to cultural diplomacy and suggests that there is still room for further theorizing in the field. Cultural diplomacy has drawn its justification and objectives from a rationalist view of politics, particularly the various realisms and liberalisms, and substantiating it with theories of social constructivism and cosmopolitanism is pertinent. Cultural diplomacy all the way down implies making common understanding of Other-societies the prime objective of the field, deploying cooperation and exchanges as a core strategy. An Ibero-American perspective implies a specific cultural-regional discourse, where mestizaje, cooperation, and understanding in the area of cultural diplomacy require a cosmopolitan constructivist approach to make sense. The result is a radical view of the Other-in-relation-to-us, both of whom are part of the family of mankind.  相似文献   
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