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Crisis narratives surrounding Europe’s 2015 migration influx fuelled demands for new ways of tracking, mapping and predicting human mobility. We explore how market opportunities for technology firms and data analytics start-ups created by the EU’s Global Approach to Migration led to solutionistic approaches to compiling and analysing migration statistics. We show that initiatives such as the rebranding of existing platforms and services as migration prediction systems are consolidating policy conceptualisations of migration as risk. Despite the promise of greater granularity, this “big data approach” cannot offer greater certainty about who is on the move and why. Instead such approaches are ill-suited to understanding the complex dynamics of migration and to offering protection to vulnerable people. The marketisation of migration statistics through big data offers a key case for advancing progressive approaches to both migration statistics and global data justice.  相似文献   
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Landscape connectivity networks are composed of nodes representing georeferenced habitat patches that link together based on a species’ maximum dispersal distance. These static representations cannot capture the complexity in species dispersal where the network of habitat patch nodes changes structure over time as a function of local dispersal dynamics. Therefore, the objective of this study is to integrate geographic information, complexity, and network science to propose a novel Geographic Network Automata (GNA) modeling approach for the simulation of dynamic spatial ecological networks. The proposed GNA modeling approach is applied to the emerald ash borer (EAB) forest insect infestation using geospatial data sets from Michigan, U.S.A. and simulates the evolution of the EAB spatiotemporal dispersal network structures across a large regional scale. The GNA model calibration and sensitivity analysis are performed. The simulated spatial network structures are quantified using graph theory measures. Results indicate that the spatial distribution of habitat patch nodes across the landscape in combination with EAB dispersal processes generate a highly connected small-world dispersal network that is robust to node removal. The presented GNA model framework is general and flexible so that different types of geospatial phenomena can be modeled, providing valuable insights for management and decision-making.  相似文献   
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Policy entrepreneurs are thought to be instrumental in agenda change, yet we lack knowledge of how legislators perceive their role in the agenda formation process. Using data from a national survey of state legislators, we examine whether entrepreneurs shape the legislative agenda on disaster preparedness and relief, which types of entrepreneurs are most influential, and what strategies they use in their interactions with legislators. The results indicate that legislators who report contact with policy entrepreneurs are more likely to have introduced related legislation, evidence of the important link between entrepreneurs and policy change. While entrepreneurs utilize a variety of different strategies, the analysis reveals policymakers are particularly receptive to entrepreneurs who provide new and reliable information. This finding suggests the influence of entrepreneurs lies not only in their ability to define problems and build coalitions, but also in their distinctive ability to provide information to elected officials, an important role that has largely been overlooked by existing literature.  相似文献   
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Reviews     
Abstract

The existence of sacred places is a widespread phenomenon throughout Palestine, one which is reflected in various types of local sites, such as water sources, graves, caves, trees and constructed shrines (maqams). In Islamic Palestine, the construction of maqams originated with the Fatimid (a Shiite group), in order to memorialise and 'greet' distinguished figures descended from the family of the prophet Muhammad. Thereafter, the Sunni faith actively adopted this concept and dedicated more than 2,500 sites to prophets, holy people, the righteous and martyrs. The sacred place of Sheikh Shihab ed-Din, like several hundred other Islamic maqams throughout Mandate Palestine, is located on top of a natural hill commanding a panoramic view. This place has held religious importance during the Byzantine and Ayyubid-Mamluk periods, right through to the present day. This paper studies the construction of the maqam as well as its related archaeological remains. It is based on a field study, a survey of the literature, and archaeological explorations conducted during a brief excavation season.  相似文献   
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