Browsing by Author "Yazgan, Ogulcan"

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Citation - WoS: 3
Citation - Scopus: 3
Construction and Demolition Waste Management in Urban Transformation: A Case Study for Performance Evaluation
(Penerbit UTHM, 2023) Ogulcan Yazgan; Yucel Yilmaz Ozturkoglu; Yeşim Deniz Özkan-Özen; Ozkan-Ozen, Yesim Deniz; Yazgan, Ogulcan; Ozturkoglu, Yucel
Due to the decreasing resources in the world different recycling applications in different sectors are gaining more importance. Urban transformations initiated especially for earthquake remnants and old buildings provide many advantages for the construction sector. Recycling of valuable materials from the wastes from each demolished construction site is very important in terms of costs. It is also important to analyse the effectiveness of both public and private companies to compare different approaches and illustrate best practices. From this point of view this research has been carried out on the recycling of construction and demolition wastes in Turkey and the performance of companies dealing with this business. Analytical hierarchy process (AHP) and gray relations analysis (GRA) will be applied for the evaluation phase. The criteria will be analysed through AHP and the connection between companies will be determined with the GRA method. According to the results potential improvement opportunities will be identified to increase the performance and competitiveness of construction excavation companies. This will also allow the findings to serve as a potential model for other construction companies operating under different contingency factors as well as presenting the list of criteria that construction companies should pay attention for performance evaluation. © 2023 Elsevier B.V. All rights reserved.
Citation - WoS: 85
Citation - Scopus: 100
Sustainable collection center location selection in emerging economy for electronic waste with fuzzy Best-Worst and fuzzy TOPSIS
(PERGAMON-ELSEVIER SCIENCE LTD, 2021) Muhittin Sagnak; Yalcin Berberoglu; Ilker Memis; Ogulcan Yazgan; Memis, Ilker; Berberoglu, Yalcin; Yazgan, Ogulcan; Sagnak, Muhittin
In emerging economies electronic waste is an important problem because it negatively affects the health of staff and people and causes pollution. Moreover the location of the collection center has a crucial role in sustainable supply chains. Therefore in this study a framework was proposed to identify the location of sustainable collection centers for e-waste. The criteria set includes 3 main criteria and 23 sub-criteria and 7 different location options. The main criteria cover economic social and environmental criteria which are organized as the Triple-Bottom-Line dimensions. Alternatives are Manisa Menemen Gaziemir Kemalpasa Torbali cigli and Akhisar. Fuzzy Best-Worst Method (BWM) and Fuzzy TOPSIS methods are used to calculate the weights of criteria and rankings of the alternatives respectively. Transportation cost was found as the most important criterion for sustainable collection center selection followed by collection cost storage/holding cost land cost greenhouse gas emissions energy cost tax and investment cost respectively. Among other alternatives cigli was found as the best alternative for sustainable collection center followed by Gaziemir and Manisa. Managerial implications were presented based on the findings. (C) 2021 Elsevier Ltd. All rights reserved.