Browsing İşletme Fakültesi / Faculty of Management by Access Type "info:eu-repo/semantics/openAccess"
Now showing items 1-20 of 113
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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 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 preconditioner for transient stability time domain simulation
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Publisher and Date:(2011)Transient Stability analysis which is one of the most important tasks of power system dynamic security analysis determines the dynamic behaviour of the power system after a large disturbance. Differential and algebraic equations (DAEs) model the nonlinear dynamic power system. The conventional time domain solution process uses a Newton method to simultaneously solve the differential equations discretized via an implicit integration method alongside the non-linear algebraic network equations. Direct ...
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A Recommender Model Based on Trust Value and Time Decay Improve the Quality of Product Rating Score in E-commerce Platforms
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Publisher and Date:(IEEE, 2017)Most of the existing products rating score algorithms do not take fake accounts and time decay of users' ratings into account when creating the list of recommendations. The trust values and the time decay of users' ratings to an item may improve the quality of product rating score in e-commerce platforms especially when it is thought that nowadays the majority of customers read the reviews before making a purchase. In this paper we first introduce the concept trust value of users by explaining its ...
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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 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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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 ...
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Assessing quality in higher education: New criteria for evaluating students' satisfaction
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Publisher and Date:(Taylor & Francis, 2011)The aim of this research is to present a new quality assurance model (5Qs) and to examine the major factors affecting students' perception of cumulative satisfaction. The model includes behavioural dimensions of student satisfaction. The factors included in this cumulative summation are technical functional infrastructure interaction and atmosphere of higher education institutions. This study concerns students in higher education institutions in Istanbul Turkey. The questionnaire contains a total ...
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Assessment of chromite liberation spectrum on microscopic images by means of a supervised image classification
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Publisher and Date:(Elsevier Science Bv, 2017)Assessment of mineral liberation spectrum with all its aspects is essential for plant control and optimization. This paper aims to estimate 2D mineral map and its associated liberation spectrum of a particular chromite sample from optical micrographs by using Random Forest Classification a powerful machine-learning algorithm implemented on a user-friendly and an open-source software. This supervised classification method can be used to accurately generate 2D mineral map of this chromite sample. ...
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"Bağımsız Mali Müşavirlerin Müşteri Seçimine Etki Eden Faktörlerin ve Karar Alternatiflerinin AHP ve MAUT Yöntemleri Çerçevesinde Değerlendirilmesi: İstanbul Kentine İlişkin Bir Uygulama"
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Publisher and Date:(Türmob, 2019)Bağımsız Serbest Muhasebeci Mali Müşavirlerin (SMMM) güven, doğruluk ve bilgiye dayanan uzun süreli bir ticari ilişki içerisinde bulunacakları müşterilerinin seçimi sırasında alacakları kararların sonuçları aslında sadece bu iki tarafı değil, işletmenin tüm paydaşlarını da etkilemektedir. Mali müşavirlerin verdikleri hizmetlerin çeşitlenmesinden ve karar alma süreçlerine çok sayıda faktör ve değişkenin etki etmesinden dolayı karar alıcıların kişisel tecrübe ve yargılarına bağlı olarak doğru, hızlı ...
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Bank credit in uncertain times: Islamic vs. conventional banks
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Publisher and Date:(Elsevier Ltd, 2020)This paper explores whether the impact of economic uncertainty on credit growth differs for Islamic vs. conventional banks. Using a sample of 416 banks (58 Islamic and 358 conventional) in 12 countries, the findings indicate that an increase in economic uncertainty significantly decreases the credit growth of conventional banks but does not have any significant impact on Islamic banks’ credit growth. Our results are robust to alternative specifications and addressing endogeneity concerns using GMM ...
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"BANKA PERFORMANSININ ENTROPİ VE COPRAS YÖNTEMİ İLE DEĞERLENDİRİLMESİ: TÜRK BANKACILIK SEKTÖRÜ ÜZERİNE BİR ARAŞTIRMA"
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Publisher and Date:(İstanbul Serbest Muhasebeci Mali Müşavirler Odası, 2019)Bu çalışmanın amacı, Türkiye’de faaliyet gösteren mevduat bankalarının finansal performansının çok kriterli karar verme yöntemlerinden Entropi ve COPRAS (Complex Proportional ASsessment) yöntemleri ile değerlendirilmesidir. Bu amaçla sektörde aktif büyüklüğü açısından en büyük 11 bankanın 2017 dönemine ilişkin finansal tablolarından hesaplanan verileri kullanılmıştır. Bankalara ait özkaynaklar, mevduatlar, personel giderleri, personel sayısı ve şube sayısı girdi faktörleri olarak ...
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BİST KİMYA, PETROL KAUÇUK VE PLASTİK ÜRÜNLER SEKTÖRÜNDEKİ İŞLETMELERİN FİNANSAL PERFORMANSLARININ HİBRİD ÇKKV YAKLAŞIMI ÇERÇEVESİNDE DEĞERLENDİRİLMESİ
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Publisher and Date:(Beykoz Üniversitesi, 2019)Bu çalışmada Borsa İstanbul (BIST) imalat sanayinde yer alan kimya, petrol kauçuk ve plastik ürünler sektöründe yer alan firmaların oran analizi yaklaşımı ile birbirleriyle karşılaştırmalı finansal performans analizi yapılmıştır. Çalışma kapsamında 30 işletmenin 2013-2017 tarihleri arasındaki temel mali tablolardan elde edilen 10 finansal oran kriteri kullanılmıştır. Elde edilen veriler “Çok Kriterli Karar Verme” (ÇKKV) yöntemlerinden Entropi ve Gri İlişkiler Analiz (GİA) ile değerlendirilmiştir. ...
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Borsa İstanbul’da İşlem Gören Çimento Firmalarının Entropi-Eatwios Bütünleşik Yaklaşımı İle Finansal Performanslarının Değerlendirmesi
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Publisher and Date:(Yaşar Üniversitesi, 2019)Gelişmekte olan ülkelerde inşaat, altyapı ve üstyapı projelerinin gerçekleştirilebilmesi büyük oranda çimento sektörü ile ilişkilidir. Bu nedenle ülkelerin çimento sektörlerine ilişkin performans ve etkinliklerinin ölçülmesi gelecekte büyüme ve gelişme perspektifine ilişkin bir takım göstergeler ortaya koyabilmektedir. Türkiye’nin bu perspektifte ilgili sektörlerinin analizi gelecek projeksiyonu için hayati düzeyde öneme sahiptir. Bu kapsamda, Borsa İstanbul (BİST) Taş, Toprak Endeksinde yer ...
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Branch outage solution using particle swarm optimization
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Publisher and Date:(2008)For post outage MW line flows and voltage magnitude calculations most of the methods use linear methods because of their simplicity. Especially for reactive power flow calculations one can face high errors. In this paper we use a minimization method that minimizes the errors resulting from the linear system model implementation. We solve the optimization problem using particle swarm optimization. We give some outage examples using IEEE 14 bus IEEE 30 bus and IEEE 57 bus data and compare the results ...