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Yayın Optimization of fertile land usage and agricultural production of Turkey(Işık Üniversitesi, 2017-01-18) Arslan, Şafak; Altunbay, Seyhun; Işık Üniversitesi, Fen Bilimleri Enstitüsü, Endüstri Mühendisliği - Yöneylem Araştırması Yüksek Lisans ProgramıTurkey has a large amount of land which is suitable for agriculture. On the other hand, agricultural activities gradually decrease every year. Moreover, the fertile lands are not used effectively. As a result, production of agricultural goods does not satisfy the domestic demand. Thus, Turkey is obliged to import lots of agricultural goods in the recent decade.Turkey has to develop the agricultural potential and productivity and demand -supply stability as soon as possible. For this purpose, an optimization model has been developed to optimize the fertile land usage and agricultural production to satisfy the increasing agricultural demand of Turkey. Residential settlements on fertile lands are another problem about the agriculturalland usage of Turkey. The fertile lands are allowed for the construction of residential settlements and this causes the decrease of the fertile land area beside a lot of negative effects to the national economy and nature.This study aims to find solutions to these problems with the help of an optimization model. Specifically, which parts of land has to be farmed, which products has to be cultivated, how much has to be cultivated, how much area has to be used for the cultivation of a specific product. Additionally, the model will yield the effect of loss of fertile land due to residential settlements on fertile lands.Yayın Deprem sonrası planlamaya yönelik lojistik ağ tasarımı: Ümraniye bölgesinde farklı deprem senaryoları için bir uygulama(Pamukkale Univ, 2019) Temur Tekin, Gül; Turgut, Yelda; Yılmaz, Abdurrahman; Arslan, Şafak; Camcı, AlperIn this study, a logistic network design for post-earthquake planning was developed. The purpose of this design is to develop a plan that enables earthquake survivors to access to basic humanitarian needs in the shortest time. In this direction, humanitarian aid and need scores were calculated for each neighborhood in a selected region, using the humanitarian aid and need scores emergency material distribution center locations were defined and distribution centers to which each neighborhood will be connected were identified. An integrated two-stage model for logistic network design optimization is proposed. In the first stage, using Analytical Hierarchy Process (AHP), humanitarian aid and need scores of the neighborhoods, each of which is a candidate for a potential distribution center, were determined. In the next stage, with the help of humanitarian aid and need score weighted and distance minimization aiming p-median model, the neighborhoods in which the distribution centers should be located as well as the distribution centers which other neighborhoods should be connected to, were identified. The proposed model was applied to the problem of establishing humanitarian aid distribution centers in the post-earthquake period for the Umraniye district of Istanbul province, and the model was reconstructed for different earthquake scenarios.
