Istanbul, Turkey

Galatasaray University

gsu.edu.tr/
Istanbul, Turkey

Galatasaray University is a Turkish university established in İstanbul, Turkey in 1992, following an agreement signed with the presence of President François Mitterrand of France and President Turgut Özal of Turkey during a ceremony at Galatasaray High School, the mother school of the university. Turkey's Ambassador to France, Coşkun Kırca, played an important role in organizing the agreement. Galatasaray University is one of the most important members of the Galatasaray Community as Galatasaray High School and Galatasaray Sports Club, and is widely regarded as one of the most prestigious and notable universities in Turkey. Galatasaray University is the only Francophone University in Turkey. The establishment has five faculties ; two institutes , 200 teachers and 2500 students.As a participant in the European exchange programs Erasmus and Socrates, Galatasaray University accommodates around 50 European students. Meanwhile, 100 students of Galatasaray University travel each year to France within the framework of these exchange programs.In essence, Galatasaray University represents a secular tradition of teaching. Courses at Galatasaray University are tri-lingual: in Turkish, French and English. Apart from French which is the primary foreign language, fluency in English as the secondary foreign language is also required. For the Faculty of Engineering, the preparatory period includes only one year of linguistic training. Galatasaray University is located at Ortaköy within the borough of Beşiktaş, a populated central district on the European side of İstanbul. The building which accommodates Galatasaray University was originally the Feriye Palace, a coastal summer palace on the Bosphorus built in 1871. Galatasaray University is heir to the centuries-old traditions of Galatasaray High School which was established in 1481 as the Galata Sarayı Enderun-u Hümayunu . Wikipedia.

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Oncan T.,Galatasaray University | Punnen A.P.,Simon Fraser University
Computers and Operations Research | Year: 2010

In this paper we consider the quadratic minimum spanning tree problem (QMSTP) which is known to be NP-hard. Given a complete graph, the QMSTP consists of finding a minimum spanning tree (MST) where interaction costs between pairs of edges are prescribed. A Lagrangian relaxation procedure is devised and an efficient local search algorithm with tabu thresholding is developed. Computational experiments are reported on standard test instances, randomly generated test instances and quadratic assignment problem (QAP) instances from the QAPLIB by using a transformation scheme. The local search heuristic yields very good performance and the Lagrangian relaxation procedure gives the tightest lower bounds for all instances when compared to previous lower bounding approaches. © 2010 Elsevier Ltd. All rights reserved.


Elicin Y.,Galatasaray University
Habitat International | Year: 2014

This article aims to focus on the urban public policy shaped by neoliberal policies and to analyze The Urban Transformation Act for the Areas under Disaster Risk in this context. With the help of policy analysis concepts and methods, the article tries to demonstrate that the political authority attempts to centralize urban politics, to eliminate mechanisms of participation in decision making and to impose an authoritarian and top-down decision-making style as the dominant mode of decision. The article concentrates on agenda-setting and argues that far from being a pluralistic process, it denies any opposition or criticism coming either from the opposition party or civil society. The source of initiative is the political authority which tries to legitimize urban transformation via an eventual earthquake risk. However, the implementation proves that urban transformation ended with an unjust rent transfer, displacement, social exclusion and thus gentrification. Despite this, the neoliberal development policies put into implementation during the last decades make clear the great importance that has been attached by the AKP government to the urban transformation process. AKP's main development strategy is based on creating attractive investment opportunities both for national and foreign capital. An authoritarian and undemocratic method of policy making accompanies these policies. © 2013 Elsevier Ltd.


Buyukozkan G.,Galatasaray University | Ifi G.,Galatasaray University
Expert Systems with Applications | Year: 2012

It is well known that "green" principles and strategies have become vital for companies as the public awareness increased against their environmental impacts. A company's environmental performance is not only related to the company's inner environmental efforts, but also it is affected by the suppliers' environmental performance and image. For industries, environmentally responsible manufacturing, return flows, and related processes require green supply chain (GSC) and accompanying suppliers with environmental/green competencies. During recent years, how to determine suitable and green suppliers in the supply chain has become a key strategic consideration. Therefore this paper examines GSC management (GSCM) and GSCM capability dimensions to propose an evaluation framework for green suppliers. However, the nature of supplier selection is a complex multi-criteria problem including both quantitative and qualitative factors which may be in conflict and may also be uncertain. The identified components are integrated into a novel hybrid fuzzy multiple criteria decision making (MCDM) model combines the fuzzy Decision Making Trial and Evaluation Laboratory Model (DEMATEL), the Analytical Network Process (ANP), and Technique for Order Performance by Similarity to Ideal Solution (TOPSIS) in a fuzzy context. A case study is proposed for green supplier evaluation in a specific company, namely Ford Otosan. © 2011 Elsevier Ltd. All rights reserved.


Alptekin S.E.,Galatasaray University
Expert Systems with Applications | Year: 2012

Mobile phones have been the most rapidly spreading development in the field of communication and information technologies over the past decades. Nowadays, digital cameras have taken their place. The wide product range in the market, each with numerous heterogeneous technical attributes, complicates the selection of the most convenient camera for end-users. The aim of this work is to provide end-users with a decision support framework for selecting the best digital camera according to their preferences. End-users and photography experts use subjective assessments when determining their requirements and making their evaluations. The proposed decision support tool is built on the basis of fuzzy set theory. The imprecision of the subjective assessments are transformed to fuzzy triangular numbers. The fuzzy analytic hierarchy process (FAHP) and fuzzy compromise programming methodologies are applied in order to determine the relative weights of sub-criteria and criteria and to rank the digital camera alternatives, respectively. © 2011 Elsevier Ltd. All rights reserved.


Buyukozkan G.,Galatasaray University | Cifci G.,Galatasaray University
Expert Systems with Applications | Year: 2012

Service sector is under pressure to deliver continuing performance and quality improvement while being customer-focused. In recent terms, there exists web based or electronic service quality (e-sq) concept. With the birth of electronic commerce, it has become important to be able to monitor and enhance e-sq. Therefore, this study will examine the e-sq concept and determine the key components of e-sq. The e-sq framework is employed by the aid of service quality (SERVQUAL) methodology as the theoretical instrument. Finally, proposed e-sq framework is illustrated with a web service performance example of healthcare sector in Turkey by using a combined multiple criteria decision making (MCDM) methodology containing fuzzy analytic hierarchy process (AHP) and fuzzy technique for order performance by similarity to ideal solution (TOPSIS). The work presented in this paper shows the applicability of the e-sq framework in explaining the complexity of aspects observed in the implementation of healthcare services via internet. © 2011 Elsevier Ltd. All rights reserved.


Karsak E.E.,Galatasaray University | Dursun M.,Galatasaray University
Expert Systems with Applications | Year: 2014

Supplier evaluation and selection is an important group decision making problem that involves not only quantitative criteria but also qualitative factors incorporating vagueness and imprecision. This paper proposes a novel fuzzy multi-criteria group decision making framework for supplier selection integrating quality function deployment (QFD) and data envelopment analysis (DEA). The proposed methodology allows for considering the impacts of inner dependence among supplier assessment criteria through constructing a house of quality (HOQ). The lower and upper bounds of the weights of supplier assessment criteria are identified by adopting fuzzy weighted average (FWA) method that enables the fusion of imprecise and subjective information expressed as linguistic variables. An imprecise DEA methodology is implemented for supplier selection, which employs the weights of supplier assessment criteria computed by FWA utilizing the data from the HOQ and the supplier ratings with respect to supplier assessment criteria. The application of the proposed framework is demonstrated through a case study in a private hospital in Istanbul. © 2014 Elsevier Ltd. All rights reserved.


Van Den Bleeken D.,Galatasaray University
Journal of High Energy Physics | Year: 2012

We revisit BPS solutions to classical N = 2 low energy effective gauge theories. It is shown that the BPS equations can be solved in full generality by the introduction of a Hesse potential, a symplectic analog of the holomorphic prepotential. We explain how for non-spherically symmetric, non-mutually local solutions, the notion of attractor flow generalizes to gradient flow with respect to the Hesse potential. Furthermore we show that in general there is a non-trivial magnetic complement to this flow equation that is sourced by the momentum current in the solution. © 2012 SISSA.


Buyukozkan G.,Galatasaray University | Cifci G.,Galatasaray University
Computers in Industry | Year: 2011

Both academic and corporate interest in sustainable supply chains has increased in recent years. Supplier selection process is one of the key operational tasks for sustainable supply chain management. This paper examines the problem of identifying an effective model based on sustainability principles for supplier selection operations in supply chains. Due to its multi-criteria nature, the sustainable supplier evaluation process requires an appropriate multi-criteria analysis and solution approach. The approach should also consider that decision makers might face situations such as time pressure, lack of expertise in related issue, etc., during the evaluation process. The paper develops a novel approach based on fuzzy analytic network process within multi-person decision-making schema under incomplete preference relations. The method not only makes sufficient evaluations using the provided preference information, but also maintains the consistency level of the evaluations. Finally, the paper analyzes the sustainability of a number of suppliers in a real-life problem to demonstrate the validity of the proposed evaluation model. © 2010 Elsevier B.V. All rights reserved.


Buyukozkan G.,Galatasaray University | Cifci G.,Galatasaray University
Information Sciences | Year: 2012

Quality function deployment (QFD) is a widely-used methodology for developing a design quality aimed at satisfying the customer and translating the customer's demand into design targets. As QFD methodology is based on the voices of customers, it requires a group of individuals, or decision makers (DMs), to express their preferences. However, there can be a bottleneck since DMs may not have a perfect knowledge of the problem to be solved. Thereby, the aim of this study is to improve the effectiveness of the evaluation process in QFD. The QFD methodology is extended by introducing a new group decision making (GDM) approach that takes into account incomplete information of DMs by means of the fuzzy set theory. The proposed approach is applied to a collaborative software development process to demonstrate its potential. © 2012 Elsevier Inc. All rights reserved.


Buyukozkan G.,Galatasaray University
International Journal of Production Research | Year: 2012

Purchasing is one of the most vital functions within a company and supplier performance evaluation is one of the most important business processes of the purchasing function. Traditionally, companies have considered factors such as price, quality, flexibility, etc. while evaluating suppliers. However, environmental pressures urge them to consider green issues. This study proposes a decision model for supplier performance evaluation by considering various environmental performance criteria. An integrated, fuzzy group decision-making approach is adopted to evaluate green supplier alternatives. More precisely, a fuzzy analytic hierarchy process (AHP) is applied to determine the relative weights of the evaluation criteria and an axiomatic design (AD)-based fuzzy group decision-making approach is applied to rank the green suppliers. Finally, a case study is given to demonstrate the potential of the methodology. © 2012 Copyright Taylor and Francis Group, LLC.

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