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Does the uncertainty associated with post-authoritarian transitions cause political and social polarization? Does ubiquitous social media exacerbate these problems and thus make successful democratic transitions less likely? This article examines these questions in the case of Egypt between the 11 February 2011 fall of President Hosni Mubarak and the 3 July 2013 military coup, which overthrew President Mohamed el-Morsi. The analysis is based on a Twitter dataset including 62 million tweets by 7 million unique users. Using a mix of quantitative and qualitative methods, we demonstrate how clusters of users form and evolve over time, the density of interactions between them, and the flow of particular types of information through the clustered network structure. We show that the Egyptian Twitter public developed into increasingly isolated clusters of the like-minded which shared information unevenly. We argue that the growing distance between these clusters encouraged political conflict and facilitated the spread of fear and hatred, which ultimately undermined the democratic transition and won popular support for the military coup.  相似文献   
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This study aims to integrate scientific knowledge from a variety of disciplines with local experience to describe, contextually and in detail, the impact of flood events on the community of the Alpine Shire and current mitigation efforts to alleviate and reduce these impacts. The Myrtleford Floodplain Management Study was the cornerstone of the strategy to address the goal of reducing flood damage in the community. It was found that the most consequential deficiencies in the Myrtleford flood mitigation scheme decision process are related to flaws in four elements of the process: the articulation of goals; the development of appropriate knowledge support; the effectiveness of promotion; and the ability to move from invocation to application. The Alpine Shire can be used as a microcosm that can represent adaptation challenges in other communities to climate change and extreme events. This research contributes to the development of the conceptual and analytical framework of integrated assessments, while making concrete contributions to the development of adaptive policies in Alpine Shire.  相似文献   
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This study examines whether macro-level opportunity indicators affect cyber-theft victimization. Based on the arguments from criminal opportunity theory, exposure to risk is measured by state-level patterns of internet access (where users access the internet). Other structural characteristics of states were measured to determine if variation in social structure impacted cyber-victimization across states. The current study found that structural conditions such as unemployment and non-urban population are associated with where users access the internet. Also, this study found that the proportion of users who access the internet only at home was positively associated with state-level counts of cyber-theft victimization. The theoretical implications of these findings are discussed.  相似文献   
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Book reviews in this article:
Negotiation and the New World Disorder James G. Blight Andrew W. Lynch  相似文献   
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