Yazar "Balcı, Mehmet Ali" için listeleme
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THE ANALYSIS OF INTERLOCKING DIRECTORS VIA HYPERGRAPHS
Balcı, Mehmet Ali; Akgüller, Ömer (Isik University, 2021)Since the dawn of the modern era, the associations that link companies together in the gathering and control networks have been interconnected. At the level of corporate governance, companies are linked by common stock ... -
Coarse Graining on Financial Correlation Networks
Balcı, Mehmet Ali; Batrancea, Larissa M.; Akgüller, Ömer; Nichita, Anca (MDPI, 2022)Community structure detection is an important and valuable task in financial network studies as it forms the basis of many statistical applications such as prediction, risk analysis, and recommendation. Financial networks ... -
Correlatıons between Network Vulnerabılıty And Laplacıan Energıes
Balcı, Mehmet Ali; Akgüller, Ömer; Kol, Erva (2019)In the network analysis, vulnerability plays key role. Similarly, Laplacian matrices are also effective tools in network analysis. In this study, we examine correlations between those two concepts. We first calculate the ... -
Discrete Geodesic Distribution-Based Graph Kernel for 3D Point Clouds
Balcı, Mehmet Ali; Akgüller, Ömer; Batrancea, Larissa M.; Gaban, Lucian (MDPI, 2023)In the structural analysis of discrete geometric data, graph kernels have a great track record of performance. Using graph kernel functions provides two significant advantages. First, a graph kernel is capable of preserving ... -
Empirical investigation on how wellbeing-related infrastructure shapes economic growth: Evidence from the European Union regions
Batrancea, Larissa M.; Nichita, Anca; Balcı, Mehmet Ali; Akgüller, Ömer (PMC, 2023)One of the most important policies of the European Union is regional development, which comprises measures of enhancing economic growth and citizens' living standards via strategic investment. Considering that economic ... -
Fractality of Borsa Istanbul during the COVID-19 Pandemic
Balcı, Mehmet Ali; Batrancea, Larissa M.; Akgüller, Ömer; Gaban , Lucian; Rus, Mircea-Iosif (MDPI, 2022)Forecasting price changes is very important for the process of estimating and managing market risk in financial markets. Price changes in financial markets may also depend on non-market factors. Considering this situation, ... -
Fractional Interaction of Financial Agents in a Stock Market Network
Balcı, Mehmet Ali (Walter de Gruyter GmbH, 2020)In this study, we present a model which represents the interaction of financial companies in their network. Since the long time series have a global memory effect, we present our model in the terms of fractional ... -
Fractional virus epidemic model on financial networks
Balcı, Mehmet Ali (De Gruyter Poland Sp Z O O, 2016)In this study, we present an epidemic model that characterizes the behavior of a financial network of globally operating stock markets. Since the long time series have a global memory effect, we represent our model by using ... -
Genelleştirilmiş Atama Probleminin Hypergraf Çözümü ve Uzaysal Veri Kümelerine Uygulaması
Balcı, Mehmet Ali (2017)Basit atama probleminde, her bir etkene en fazla bir iş atanmaktadır; bu kısıtlanış genelleştirilmiş atama problemlerinde gevşetilmiştir. Oldukça iyi bilinen Genelleştirilmiş Atama Probleminin hedefi etkenlere iş atarken ... -
Geodetic convex boundary curvatures of the communities in stock market networks
Akgüller, Ömer; Balcı, Mehmet Ali (Elsevier Science Bv, 2018)We analyze the daily returns of stock market indices of NASDAQ and S&P 500 over the period of 2004-2015. We build network models by using a threshold method that captures strong relations amongst the agents. We also subdivide ... -
Hierarchies in communities of Borsa Istanbul Stock Exchange
Balcı, Mehmet Ali (Hacettepe Univ, Fac Sci, 2018)Nowadays, increase of the analyzing stock markets as complex systems lead graph theory to play key role. For instance detecting graph communities is an important task in the analysis of stocks, and minimum spanning trees ... -
Hybrid Euler-Taylor matrix method for solving of generalized linear Fredholm integro-differential difference equations
Balcı, Mehmet Ali; Sezer, Mehmet (Elsevier Science Inc, 2016)The main purpose of this paper is to present a numerical method to solve the linear Fredholm integro-differential difference equations with constant argument under initial-boundary conditions. The proposed method is based ... -
Hyperpath Centers
Balcı, Mehmet Ali; Paşalı Atmaca, Sibel; Akgüller, Ömer (Springer-Verlag Berlin, 2016)Path centers play an important role for several kinds of networks. In this study we present a novel approach to find a path center for a spatial data set modelled as a hypergraph. For this purpose, we first present a simple ... -
Jeodezi Dagılımı Temelli Graf Çekirdegi ve 3B Nokta Bulutu Uygulamaları
Akgüller, Ömer; Balcı, Mehmet Ali (EEEAG, 2022)Nokta bulutları, veri kümeleri için en temel çok yönlü temsillerden biridir. Nokta bulutlarının elde edilmesini saglayan kaynaklardan biri, birçok disiplinde de uygulamaları olan lazer menzil tarayıcıları gibi 3B sekil ... -
Mathematical Morphology on Soft Sets for Application to Metabolic Networks
Balcı, Mehmet Ali; Akgüller, Ömer (Springer-Verlag Berlin, 2015)In this paper, we introduce mathematical morphological operators such as dilation and erosion on soft sets. Rather than the common approach which is based on expressing soft set analogues of the classical theory, we use ... -
Network-Induced Soft Sets and Stock Market Applications
Balcı, Mehmet Ali; Batrancea, Larissa M.; Akgüller, Ömer (MDPI, 2022)The intricacy of the financial systems reflected in bilateral ties has piqued the interest of many specialists. In this research, we introduce network-induced soft sets, a novel mathematical model for studying the dynamics ... -
A New Topologıcal Measure for the Communıtıes of Stock Market Networks
Akgüller, Ömer; Öcal, Sinem; Balcı, Mehmet Ali (2017)Gıda ağları, bilimsel alıntılar, sosyal ağlar, haberleşme ağları, Internet ve borsa ağları gibi interaktif aktörleri içeren sistemler, karmaşık sistemlerin içeriği kapsamı altında pek çok araştırmacı tarafından incelenmiştir. ... -
Novel Graph Neighborhoods Emerging from Ideals
Çaksu Güler, Ayşegül; Balcı, Mehmet Ali; Batrancea, Larissa M.; Akgüller, Ömer; Gaban, Lucian (MDPI, 2023)Rough set theory is a mathematical approach that deals with the problems of uncertainty and ambiguity in knowledge. Neighborhood systems are the most effective instruments for researching rough set theory in general. ... -
Path-Based Visibility Graph Kernel and Application for the Borsa Istanbul Stock Network
Balcı, Mehmet Ali; Akgüller, Ömer; Batrancea, Larissa M.; Gaban, Lucian (MDPI, 2023)Using networks to analyze time series has become increasingly popular in recent years. Univariate and multivariate time series can be mapped to networks in order to examine both local and global behaviors. Visibility ... -
Potential of game << PLANT TISSUE CULTURE >> in bioengineering education as distance laboratory classes
Balcı, Mehmet Ali; Akgüller, Ömer; Kaya, Ergun; Rzhevska, Nataliia; Dobroskok, Irina; Basiuk, Liubov; Kosa, Tetiana (Wiley, 2020)This study evaluates the effectiveness of the developed game as a form of distance laboratory works at the Universities of Turkey and Ukraine. Studying the effectiveness of laboratory research concerning engineering ...
