Kurum Yazarı "Balcı, Mehmet Ali" Matematik Bölümü Koleksiyonu İçin 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 ... -
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 ... -
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 ... -
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 ... -
A Series-Based Deep Learning Approach to Lung Nodule Image Classification
Balcı, Mehmet Ali; Batrancea, Larissa M.; Akgüller, Ömer; Nichita, Anca (MDPI, 2023)Although many studies have shown that deep learning approaches yield better results than traditional methods based on manual features, CADs methods still have several limitations. These are due to the diversity in imaging ... -
Sources of SMEs Financing and Their Impact on Economic Growth across the European Union: Insights from a Panel Data Study Spanning Sixteen Years
Balcı, Mehmet Ali; Batrancea, Larissa M.; Chermezan, Leontin; Akgüller, Ömer; Masca, Ema Speranta (MDPI, 2022)Getting access to sufficient funding is the keystone for the development of any business, but especially for small and medium enterprises (SMEs). These economic entities are crucial players in the global economy since they ... -
Time fractional capital-induced labor migration model
Balcı, Mehmet Ali (Elsevier Science Bv, 2017)In this study we present a new model of neoclassical economic growth by considering that workers move from regions with lower density of capital to regions with higher density of capital. Since the labor migration and ...