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Yayın Energy harvesting cooperative multiple access channel with decoding costs(IEEE, 2016) Arafa, Ahmed M.; Kaya, Onur; Ulukuş, ŞennurWe consider an energy harvesting cooperative multiple access channel (AC) with decoding costs. In this setting, users cooperate at the physical layer (data cooperation) in order to increase the achievable rates. Data cooperation comes at the expense of decoding costs: each user spends some amount of its harvested energy to decode the message of the other user, before forwarding both messages to the receiver. The decoding power spent is an increasing convex function of the incoming message rate. We characterize the optimal power scheduling policies that achieve the boundary of the maximum departure region subject to energy causality constraints and decoding costs by using a generalized water-filling algorithm.Yayın Countering insurgency: Turkey's policy toward the PKK's transnational dynamics in Europe(Routledge Journals, Taylor & Francis Ltd, 2018-01-02) Kayhan Pusane, Özlem; Ilgıt, AslıInsurgents often develop international connections and benefit from external assistance from a variety of sources. Support from diaspora communities has long been considered one of the critical external factors in the persistence of insurgent groups. Yet how the counterinsurgent state addresses external support from transnational ethnic communities and what factors influence the state's policies remain understudied. By focusing on the transnational political practices of the Kurdish community and the PKK in Western Europe, this paper examines how Turkey has addressed the diasporic support for the PKK since the 1980s. It shows that three major factors - the composition of foreign policy decision-makers, their ideological contestation over the Kurdish question, and the European political context - have affected Turkey's policy regarding the PKK's transnational dynamics in Europe.
