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AbstractFor small groups fighting in multi-actor civil wars, joining a larger coalition is often a way to survive. Yet, it is not only rebel or pro-government non-state armed groups that form alliances; in many cases, jihadists have been surprisingly successful in building winning coalitions in civil wars. This is puzzling because jihadists attract fierce international opposition and are therefore very risky teams to join. Jihadists are also typically excluded from the political process, which means that they are unlikely to enjoy the spoils of a peace agreement. Why then would any local groups choose to join jihadist coalitions, rather than other rebel or pro-government coalitions in a conflict theatre? In this paper, we argue that ideology fails to explain this choice; rather, we contend that competition among rebel and pro-government coalitions inevitably produces winners and losers. Under these conditions, jihadists serve as an attractive spoiler coalition, drawing support from groups that see no chance of benefitting from an existing or future peace agreement. By offering these 'losers' a wider network and reference group, jihadists can expand their coalition base and territorial reach. By courting support from marginalized groups across ethnic and tribal lines, jihadists can create a winning coalition out of a diverse mix of losers.

Authors and/or their employers shall have the right to post the accepted version of IEEE-copyrighted articles on their own personal servers or the servers of their institutions or employers without permission from IEEE, provided that the posted version includes a prominently displayed IEEE copyright notice and, when published, a full citation to the original IEEE publication, including a link to the article abstract in IEEE Xplore. Authors shall not post the final, published versions of their papers. ; In sensor networks, the large amount of data generated by sensors greatly influences the lifetime of the network. In order to manage this amount of sensed data in an energy-efficient way, new methods of storage and data query are needed. In this way, the distributed database approach for sensor networks is proved as one of the most energy-efficient data storage and query techniques. This paper surveys the state of the art of the techniques used to manage data and queries in wireless sensor networks based on the distributed paradigm. A classification of these techniques is also proposed. The goal of this work is not only to present how data and query management techniques have advanced nowadays, but also show their benefits and drawbacks, and to identify open issues providing guidelines for further contributions in this type of distributed architectures. ; This work was partially supported by the Instituto de Telcomunicacoes, Next Generation Networks and Applications Group (NetGNA), Portugal, by the Ministerio de Ciencia e Innovacion, through the Plan Nacional de I+D+i 2008-2011 in the Subprograma de Proyectos de Investigacion Fundamental, project TEC2011-27516, by the Polytechnic University of Valencia, though the PAID-05-12 multidisciplinary projects, by Government of Russian Federation, Grant 074-U01, and by National Funding from the FCT-Fundacao para a Ciencia e a Tecnologia through the Pest-OE/EEI/LA0008/2013 Project. ; Diallo, O.; Rodrigues, JJPC.; Sene, M.; Lloret, J. (2013). Distributed Database Management ...