İktisadi ve İdari Bilimler Fakültesi / Faculty of Economics and Administrative Sciences
Permanent URI for this collectionhttps://hdl.handle.net/11727/1399
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Item Numerical Solution of MHD Incompressible Convection Flow in Channels(2019) Gurbuz, Merve; Tezer-Sezgin, MunevverThe purpose of this paper is to study numerically the influence of the magnetic field, buoyancy force and viscous dissipation on the convective flow and temperature of the fluid in a square cavity, lid-driven cavity, and lid-driven cavity with an obstacle at the center. The continuity, momentum and energy equations are coupled including buoyancy and magnetic forces, and energy equation contains Joule heating and viscous dissipation. The equations are solved in terms of stream function, vorticity and temperature by using polynomial radial basis function (RBF) approximation for the inhomogeneity and particular solution. The numerical solutions are obtained for several values of Grashof number (Gr), Hartmann number (M) for fixed Prandtl number Pr = 0:71 and fixed Reynolds number Re = 100 with or without viscous dissipation. It is observed that in the absence of obstacle, viscous dissipation changes the symmetry of the isotherms, and the dominance of buoyancy force increases with an increase in Gr, whereas decreases when the intensity of magnetic field increases. The obstacle in the lid-driven cavity causes a secondary flow on its left part. The effect of moving lid is weakened on the flow and isotherms especially for large Gr when the cavity contains obstacle.Item MNEs' location strategies and labor standards: The role of operating and reputational considerations across industries(2019) Maggioni, Daniela; Santagelo, Grazia D.; Koymen-Ozer, SedaWe investigate the role of local labor standards on MNEs' location decisions across different sectors and sub-national regions within a developing country. We suggest that foreign investors adopt selective location strategies in connection with specific labor standards as a result of reputational and operating considerations. Foreign firms in more hazardous sectors prefer locations with higher occupational health and safety standards because they are more exposed to reputational risks. Those in sectors with less reversible investments prefer locations with lower degrees of unionization because their lower bargaining power increases their sensitivity to operating costs. We test our arguments across 26 sub-national Turkish regions over the period 2005-2011.Item Turkish foreign policy after the 'Arab Spring': from agenda-setter state to agenda-entrepreneur state(2014) Ozpek, Burak Bilgehan; Demirag, YeldaThis article explores Turkey's changing foreign policy approach towards the Middle East after the spread of the Arab upheavals to Syria. Instead of preserving the status quo, Ankara has turned to a revisionist state that has begun to threaten Middle Eastern governments. While Turkey was reluctant to join the foreign military interventions against Middle Eastern regimes, (e. g. Libya) it has been instrumental in immersing NATO in the Syrian civil war. Such transformation ultimately undermines analyses that define Turkey as the kingmaker of the Middle East.Item The 'Arab Spring': implications for US-Israeli relations(2014) Eligur, BanuThis article argues that the 'Arab Spring' has ended the long-standing US-Israeli common strategy of supporting pro-Western and semi-secular autocracies in the Arab world. During these tumultuous events Washington chose to support the rebellions to varying degrees, thus exacerbating Israel's concerns regarding the adverse regional implications attending this shift (notably the ascendance of Islamist regimes and the diversion of world attention from Iran's nuclear quest). By way of ameliorating such threats, the US needs to pursue a policy of supporting pro-democracy groups in the region while formulating a clear policy to deal with the threats from Iran and radical Islamist groups. All in all, the 'Arab Spring' has created a highly volatile strategic environment thus making Israel an even more valuable strategic ally for the USItem Improving service quality in highway passenger transportation: a case study using quality function deployment(2014) Pakdil, Fatma; Kurtulmusoglu, Feride BaharThe highly competitive market conditions in the passenger transportation industry pressure service provider firms to adopt an attitude of customer-oriented service quality. Even though the service quality of passenger transportation has been a concern in the literature, how the service quality of highway passenger transportation systems could be improved using a systematic approach has not been investigated. Using Quality Function Deployment (QFD), this is the first attempt to improve the quality of highway passenger transportation services. The analysis reveals that the passengers' most important expectations are employees' empathetic approach toward customers, technical specifications of buses, error-free services, and competent employees. Additionally, the most important technical requirements are employee-oriented technical requirements, technical specifications of buses, and error-free services in highway passenger transportation.Item Closing price manipulation in Borsa Istanbul and the impact of call auction sessions(2015) Kadioglu, Eyup; Kucukkocaoglu, Guray; Kilic, SaimTo reduce extraordinary price movement and to ensure more effective price formation at closing time, Borsa Istanbul implemented closing call auction sessions on March 2, 2012. This study tests the effect of closing call auction sessions on closing price manipulation in Borsa Istanbul using 102 shares in various indexes. The analysis focuses on 624 days from November 1, 2006 to May 31, 2012. The results reveal an upward-oriented closing price manipulation prior to the implementation of closing call auction sessions. The data show a significant elimination in closing price manipulation following the implementation of closing call auction sessions. Copyright (C) 2015, Borsa Istanbul Anonim Sirketi. Production and hosting by Elsevier B.V.Item Ecovillages as A Destination and A Study of Consumer Approaches to Ecovillages(2015) Adalilar, Sefik Naci; Alkibay, Sanem; Eser, ZelihaEcovillages are models of sustainable settlements in cultural, ecological and economic context. There are several scientific studies related to ecovillages in other countries; however, there are no such studies in Turkey. This study is aimed to examine the consumer perceptions, attitudes and preferences regarding ecovillages. Based on 420 surveys with domestic and foreign consumers in Turkey, the findings revealed that, ecovillages are generally preferred by people who are between the 35-54 years old, and have high level education and income. "Being a sustainable life style" and "Having an authentic experience in a rural area" are identified as the most important factors that influence consumers' demand for ecovillages. Findings also manifested that transportation to the ecovillage accommodation, supporting services and attractions are the important factors for consumer pereferences. (C) 2015 The Authors. Published by Elsevier B.V.Item Counterfeit Supply Chains(2015) Eser, Zeliha; Kurtulmusoglu, Bahar; Bicaksiz, Adnan; Sumer, Selay IlgazThis paper studies supply chains of counterfeits in Turkey based on insider information from actors in such chains as well as from knowledgeable witnesses. The study depends on semi-structured interviews with actors in or witnesses to such chains. Findings suggest that (i) various forms of counterfeit supply chains exist, (ii) profit margins of counterfeiters seem to be higher than legitimate businesses, (iii) counterfeiters are discouraged if they experience actual or threatened litigation, (iv) law enforcement places higher priority on fighting counterfeits that threaten public health and safety, and (v) counterfeits appear to drive down the prices of legitimate products. Overall, poor action by legitimate businesses against counterfeiters, weak institutional efforts on the part of law enforcement and low consumer awareness appear to foster counterfeit supply chains, or at least contribute to their persistence. (C) 2015 The Authors. Published by Elsevier B.V.Item The need for technology management education for undergraduate programs: A conceptual framework(2018) Tas, M.; Yeloglu, H.O.As the National Research Council [17] described the technology management as “a process, which includes planning, directing, control and coordination of the development and implementation of technological capabilities to shape and accomplish the strategic and operational objectives of an organization’’, Technology Management education is becoming more important for solving problems within organizations. Therefore, institutions of higher education need to lead the way in developing programs, curriculums, departments, and institutes addressing and meeting the needs of industries and the organizations. In this paper we evaluate the need of technology management undergraduate programs and provide some insights about this need. We realize the importance of technology management in both industrial and academic contexts and how important it is to have an interaction and collaboration between the industry organizations and universities. However, there is a lack of technology education on undergraduate level at today’s universities curriculum. While there are many graduate programs on technology management in universities around the world, scholars and practitioners are paying less attention to undergraduate programs on technology management education. Therefore, we focus more on technology management education in undergraduate programs by outlining several assumptions, proposing a conceptual framework based on current debates in literature, and articulating its importance in the academic. © 2018 by authors, all rights reserved.Item The Moderating Role of Self Efficacy on the Perceptions of Justice and Turnover Intentions(2016) Celik, Duysal Askun; Yeloglu, Hakki Okan; Yildirim, Olcay Bilge; L-1624-2017Previous research in organizational behavior has reported many variables serving as either mediators or moderators in the predictive relationship between justice perceptions and turnover intentions. So far, none of the studies seems to have considered the possible influence of self-efficacy as a moderating variable in that relationship. Positive organizational behavior approach strongly offers usage of individual capacity variables for producing positive organizational outcomes (Luthans, 2002). In this study, we have explored the moderating role of self-efficacy in the relationship between justice perceptions and turnover intentions. Nine-hundred and four employees coming from private companies of Istanbul and Ankara, in Turkey, participated in the study. To analyze the results, we have used confirmatory factor analyses and regression analyses. Our results revealed important findings in relation to the moderating effects of different self-efficacy dimensions. We have found a negative relationship between justice perceptions and turnover intentions. For self-efficacy dimensions, many interaction effects were as expected, except for those high in willingness to expend effort in completing the behavior. We discussed the results in light of certain theoretical assumptions and offered related recommendations for organizational practice and future research. (C) 2016 The Authors. Published by Elsevier Ltd.