Browsing İşletme Fakültesi / Faculty of Management by Type "Article"
Now showing items 1-20 of 169
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A Bayesian approach to developing a strategic early warning system for the French milk market
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Publisher and Date:(HALMSTAD UNIV SWEDEN, 2017)A new approach is provided in our paper for creating a strategic early warning system allowing the estimation of the future state of the milk market as scenarios. This is in line with the recent call from the EU commission for tools that help to better address such a highly volatile market. We applied different multivariate time series regression and Bayesian networks on a pre-determined map of relations between macro-economic indicators. The evaluation of our findings with root mean square error ...
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A behavioral analysis of investor diversification
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Publisher and Date:(Routledge Journals Taylor & Francis Ltd, 2014)This paper studies the link between individual investors' portfolio diversification levels and various personal traits that proxy informational advantages and overconfidence. The analysis is based on objective data from the largest Turkish brokerage house tracking 59951 individual investors' accounts with a total of 3248654 million transactions over the period 2008-2010. Wealthier highly educated older investors working in the finance sector and those trading relatively often show higher diversification ...
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A characterization of totally umbilical hypersurfaces of a space form by geodesic mapping
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Publisher and Date:(Springer, 2013)The idea of considering the second fundamental form of a hypersurface as the first fundamental form of another hypersurface has found very useful applications in Riemannian and semi-Riemannian geometry especially when trying to characterize extrinsic hyperspheres and ovaloids. Recently T. Adachi and S. Maeda gave a characterization of totally umbilical hypersurfaces in a space form by circles. In our paper we give a characterization of totally umbilical hypersurfaces of a space form by means of ...
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A critical analysis of current legal developments on the political participation of minorities in Turkey
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Publisher and Date:(2010)This is a follow-up article to the one published in the IJMGR half a decade ago (Vol. 12 2005). Although there have been domestic and international legal cases that are directly concerned with the political participation of minorities in Turkey few improvements have been made in law covering the subject. This encouraged this author to analyse and criticise the judgements of the European Court of Human Rights and the legal and political actors at domestic level. The aim of this article is to reflect ...
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A Generic Framework for Building Heterogeneous Simulations of Parallel and Distributed Computing Systems
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Publisher and Date:(Springer Heidelberg, 2017)There have been many systems available for parallel and distributed computing (PDC) applications such as grids clusters super-computers clouds peer-to-peer and volunteer computing systems. High-performance computing (HPC) has been an obvious candidate domain to take advantage of PDC systems. Most of the research on HPC has been conducted with simulations and has been generally focused on a specific type of PDC system. This paper however introduces a general purpose simulation model that can be ...
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A new energy paradigm for Turkey: A political risk-inclusive cost analysis for sustainable energy
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Publisher and Date:(Elsevier Science, 2011)Implementing sustainable development policies in order to achieve economic and social development while maintaining adequate environmental protection to minimize the damage inflicted by the constantly increasing world population must be a major priority in the 21st century. While the emerging global debate on potential cost-effective responses has produced potential solutions such as cap and trade systems and/or carbon taxes as part of evolving sustainable energy/environmental policies this kind ...
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A New Preconditioner Design Based on Spectral Division for Power Flow Analysis
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Publisher and Date:(Praise Worthy Prize Srl, 2011)Solution of large sparse linear systems is the most lime consuming part in many power system simulations. Direct solvers based on LU factorization although robust are known to have limited satiability on parallel platforms. Thus. Krylov subspace based iterative methods (i.e. Conjugate Gradient method Generalized Minimal Residuals (GMRES) method) can be used as alternatives. To achieve competitive performance and robustness however the Krylov subspace methods need a suitable preconditioner. In this ...
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A Search for Missing Links: Specifying the Relationship Between Leader-Member Exchange Differentiation and Service Climate
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Publisher and Date:(Sage Publications Inc, 2016)We search for missing links in how the different social exchange relationships employees have with supervisors (i.e. leader-member exchange [LMX] differentiation) affect their unit service climate perceptions. Drawing on a social comparison perspective we propose a model in which the different relationships service employees establish with supervisors negatively impact unit service climate through elevated unit relationship conflict. We further suggest that unit relationship conflict plays a ...
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A sparsity-preserving spectral preconditioner for power flow analysis
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Publisher and Date:(TUBITAK Scientific & Technical Research Council Turkey, 2016)Due to the ever-increasing demand for more detailed and accurate power system simulations the dimensions of mathematical models increase. Although the traditional direct linear equation solvers based on LU factorization are robust they have limited scalability on the parallel platforms. On the other hand simulations of the power system events need to be performed at a reasonable time to assess the results of the unwanted events and to take the necessary remedial actions. Hence to obtain faster ...
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A survey analysis on the investment attitudes of individual investors
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Publisher and Date:(Bilgesel Yayincilik San & Tic Ltd, 2013)This study aims to analyze determinants of trading behavior of individual investors where a survey of 55 questions on 85 people is used. The survey is composed of four parts: demographic properties perceived emotions investment preferences portfolio diversification. The findings show that investors are subject to home bias and the surveyed investors prefer to invest in local equity market. The findings show that older investors have less investment confidence and more diversification where number ...
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A tournament analysis of mutual funds in Turkey
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Publisher and Date:(Bilgesel Yayincilik San & Tic Ltd, 2012)This is an analysis of the mutual funds in Turkey with respect to their risk-altering behavior Using the monthly returns and volatilities of 133 funds from 2002 to 2007 we divide each year in two parts and check whether or not the funds' performance in the first part affects the behavior of mutual fund companies in the second part in terms of risk. We find sufficient evidence that the funds which have lower/higher performance in the first part of the year have higher/lower risk appetite for the ...
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An Adaptive Affinity Matrix Optimization for Locality Preserving Projection via Heuristic Methods for Hyperspectral Image Analysis
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Publisher and Date:(IEEE-Inst Electrıcal Electronıcs Engıneers Inc, 2019)Locality preserving projection (LPP) has been often used as a dimensionality reduction tool for hyperspectral image analysis especially in the context of classification since it provides a projection matrix for embedding test samples to low dimensional space. However, the performance of LPP heavily depends on the optimization of two parameters of the graph affinity matrix: k-nearest neighbor and heat kernel width, when one considers an isotropic kernel. These two parameters might be optimally ...
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Adoption of Mobile Health Apps in Dietetic Practice: Case Study of Diyetkolik
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Publisher and Date:(Jmır Publıcatıons, Inc, 130 Queens Quay E, 2020)Background: Dietetics mobile health apps provide lifestyle tracking and support on demand. Mobile health has become a new trend for health service providers through which they have been shifting their services from clinical consultations to online apps. These apps usually offer basic features at no cost and charge a premium for advanced features. Although diet apps are now more common and have a larger user base, in general, there is a gap in literature addressing why users intend to use diet apps. ...
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Alone but together autonomous but related: Self-construal effects on happiness in social experiences
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Publisher and Date:(Wiley, 2018)Communal tables and open workspaces have become popular servicescapes that is contemporary spaces for experiencing dining or working alone but together. Previous research demonstrates that experiencing with close others (e.g. with friends or family) increases happiness and satisfaction but experiences shared with strangers in contexts such as communal tables or workshops have not yet been thoroughly analyzed. Addressing this research gap from a social-psychological perspective we suggest that even ...
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An analysis of the unemployment selected MENA countries and Turkey
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Publisher and Date:(2008)One of the most important economic and social problems of the Middle East and North Africa (MENA) is the high rate of unemployment. Unemployment in the selected MENA countries like Egypt Israel Jordan and Turkey are examined as well as the relationship between growth and unemployment. For this reason active labor market policies should be designed to address job creation in addition to structural reform in labor markets.
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An Inverse Boundary Value Problem for a Second Order Elliptic Equation in a Rectangle
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Publisher and Date:(Vilnius Gediminas Tech Univ, 2014)In this paper the inverse problem of finding a coefficient in a second order elliptic equation is investigated. The conditions for the existence and uniqueness of the classical solution of the problem under consideration are established. Numerical tests using the finite-difference scheme combined with an iteration method is presented and the sensitivity of this scheme with respect to noisy overdetermination data is illustrated.
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An inverse coefficient problem for a quasilinear parabolic equation with periodic boundary and integral overdetermination condition
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Publisher and Date:(Wiley-Blackwell, 2015)In this paper the inverse problem of finding the time-dependent coefficient of heat capacity together with the solution periodic boundary and integral overdetermination conditions is considered. Under some natural regularity and consistency conditions on the input data the existence uniqueness and continuous dependence upon the data of the solution are shown. Some considerations on the numerical solution for this inverse problem are presented with an example. Copyright (c) 2014 John Wiley & Sons Ltd.
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An investigation of financial literacy money ethics and time preferences among college students: A structural equation model
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Publisher and Date:(Emerald Group Publishing Limited, 2019)Purpose: Financial literacy has a strong influence on financial well-being and it is a concept especially important for college students who start to develop their financial habits. The purpose of this paper is to examine the relationship between financial literacy money attitudes and time preferences among Turkish university students. Design/methodology/approach: Data were collected from 1443 university students from 14 campuses in Turkey. Structural equation modeling methodology is employed to ...
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Antecedents and performance outcomes of value-based selling in sales teams: a multilevel, systems theory of motivation perspective
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Publisher and Date:(Springer, 2020)Firms are increasingly deploying a value-based selling (VBS) approach in their sales organizations to drive growth for new offerings. However, VBS adoption remains challenging, signaling that leaders need guidance to motivate VBS. Drawing from the systems theory of motivation, we examine motivational mechanisms at two levels-salesperson and sales team-to understand how to motivate, and benefit from, VBS. Using multisource data (i.e., salespeople, managers, archival performance) from 70 sales teams ...
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Applying a behavioural and operational diagnostic typology of competitive intelligence practice: empirical evidence from the SME sector in Turkey
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Publisher and Date:(Taylor and Francis Group, 2012)This paper reports on an empirical study conducted within the SME sector in the city of Istanbul Turkey. The findings from this study enabled the creation of a behavioural and operational typology of competitive intelligence practice one developed from the work of S. Wright D.W. Pickton and J. Callow (2002. Competitive intelligence in UK firms: A typology. Marketing Intelligence & Planning 20 349-360). Using responses to questions which indicated a type of behaviour or operational stance towards ...