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    Examining the prominent components of the emerging specialty coffee sector in Turkey
    (Routledge Journals, Taylor & Francis Ltd, 2022) Ünan Göktan, Deniz; Uslu, Tanyeri
    The aim of this study is to explore the specialty coffee sector in Turkey as an emerging business and culinary culture. Semi-structured in-depth interviews are collected with individuals that work as baristas, managers, and sectorial experts, to examine how individuals who offer service within the market perceive the sector and consumers. Results show that individuals who work within the market embrace distinctive characteristics of specialty coffee and see coffee making as a life style. Symbolic value of specialty coffee is a substantial source of motivation for participants. Consumers' involvement with third wave is seen as limited. A major issue for the sector comes forward as the lack of standardization, which is observed through the instabilities within product and service quality and branding. Our study contributes to the existing literature as it demonstrates how specialty coffee culture emerges in a particular context, Turkey and examines third wave coffee with an interdisciplinary perspective.
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    Scenario-based designing of closed-loop supply chain with uncertainty in returned products
    (Growing Science, 2019) Sahebi, Iman Ghasemian; Masoomi, Behzad; Ghorbani, Shahryar; Uslu, Tanyeri
    Closed-loop supply chain management is an effective and efficient solution for a set of activities to retrieve a product from a customer and improve its value or to dispose it. Today, designing and planning a closed-loop chain is an inevitable but difficult task. In this research, a scenario-based modeling approach is presented by considering both forward and reverse flows as a closed-loop supply chains in steel industry. The proposed study also develops a multi-product and multiperiod model based on a mixed integer linear programming (MILP) approach for profit maximization. The study also considers uncertainty in the amount of raw material, processing, storage and distribution of several products flow. Uncertainty is associated with the quantity and quality of the products in the reverse flow, which are directly affected by customers and sorting centers, respectively. Finally, the model is deployed in Steel industry with real data. The results show that by increasing the quality level of returned products the need for raw materials is reduced and the total profit of the supply chain is increased.