Now showing items 41-60 of 70

    • Optimizing bus lines using genetic algorithm for public transportation 

      Batuhan, Bulut; Günay, Melih; Özgün, Kamer; Ledet, Joseph (The 6th International Conference on Smart City Applications, 2021)
      Due to increasing human population, the need for quality public transportation has also increased. This study takes stop density, stop layout, and passenger population of those stops into consideration to offer a better ...
    • Effects of pedestrian traffic changes due to COVID-19 pandemic: case study in Antalya, Turkey 

      Alagök, Ece; Şimşek, Elvan; Demir, Emre; Özgün, Kamer (6th International New York Conference on Evolving Trends in Interdisciplinary Research & Practices, 2022)
    • Use of phase-contrast MRI to measure aortic stiffness in young-onset hypertension: a pilot study 

      Özer Gökaslan, Çiğdem; Gökaslan, Serkan; Demirel, Emin; Şengül Ayan, Sevgi (Cardiology in the Young, 2022)
      Young-onset hypertension is defined as hypertension diagnosed before the age of40 years. Aortic pulse wave velocity is an indication of aortic stiffness. MRI assessment has beenwell verified compared to invasive pressure ...
    • Classification of diabetic cardiomyopathy-related cells using machine learning 

      Dalaman, Uğur; Şengül Ayan, Sevgi; Yaraş, Nazmi (Moscow University Physics Bulletin, 2022)
      The patch-clamp technique is a significant tool in current electrophysiology research, especially in cardiovascular diseases, because it can capture electrical activity of the heart from cardiomyocytes. It is challenging ...
    • Similar and self-similar null Cartan curves in Minkowski-Lorentzian spaces 

      Şimşek, Hakan (Communications Faculty of Sciences University of Ankara Series A1 Mathematics and Statistics, 2022)
      In this paper, differential invariants of null Cartan curves are studied in (n+2) dimensional Lorentzian similarity geometry. The fundamental theorem for a null Cartan curve in similarity geometry is investigated and the ...
    • Quantitative roles of ion channel dynamics on ventricular action potential 

      Şengül Ayan, Sevgi; Sırcan, Ahmet Kürşad (Channels, 2021)
      Mathematical models for the action potential (AP) generation of the electrically excitable cells including the heart are involved different mechanisms including the voltage-dependent currents with nonlinear time- and ...
    • An alternative approach to determination of Covid‑19 personal risk index by using fuzzy logic 

      Şimşek, Hakan; Yangın, Elifnaz (Health and Techonology, 2022)
      COVID-19 disease is an outbreak that seriously affected the whole world, occurred in December 2019, and thus was declared a global epidemic by WHO (World Health Organization). To reduce the impact of the epidemic on humans, ...
    • Modeling and analyzing Ca2+ channel dynamics during cardiac action potential 

      Şengül Ayan, Sevgi; Sırcan, Ahmet K.; Kurt, Ahmet; Özdoğan, Hasan (International Conference on Applied Analysis and Mathematical Modeling, 2019)
      We have studied the cardiac action potential model which consists of 26 nonlinear first-order differential equations in a detailed manner computationally. Later, it has been discussed what is the role of the Ca2+ ion channel ...
    • Computational bifurcation analysis to find dynamic transitions of the corticotroph model 

      Şengül Ayan, Sevgi; Kurt, Ahmet (Ankara University Faculty of Sciences, 2018)
      The corticotroph model is a 7th order nonlinear differential equation system derived for representing the action potential dynamics of corticotrophs; one of the endocrine cells that are responsible for stress regulation. ...
    • Mathematical model of the ventricular action potential and effects of isoproterenol-induced cardiac hypertrophy in rats 

      Şengül Ayan, Sevgi; Sırcan, Ahmet K.; Abewa, Mohamedou; Kurt, Ahmet; Dalaman, Uğur; Yaraş, Nazmi (European Biophysics Journal, 2020)
      Mathematical action potential (AP) modeling is a well-established but still-developing area of research to better understand physiological and pathological processes. In particular, changes in AP mechanisms in the isoproterenol ...
    • Selection industry 4.0 maturity model using fuzzy and intuitionistic fuzzy topsis methods for a solar cell manufacturing company 

      Altan Koyuncu, Cansu; Aydemir, Erdal; Başarır, Ali Cem (Soft Computing, 2021)
      Maturity models help organizations identify the processes of transformation and needs by analyzing the current situation of production systems. Within the scope of Industry 4.0, in this study, several maturity models are ...
    • On Einstein Finsler metrics 

      Ülgen, Semail; Sevim, Esra Sengelen; Hacinliyan, İrma (World Scientific Publishing Company, 2021)
      In this paper, we study Finsler metrics expressed in terms of a Riemannian metric, a 1-form, and its norm and find equations with sufficient conditions for such Finsler metrics to become Ricci-flat. Using certain ...
    • Analysis of public transportation for efficiency 

      Özgün, Kamer; Günay, Melih; Başaran, Barış Doruk; Bulut, Batuhan; Yürüten, Ege; Baysan, Fatih; Kalemsiz, Melisa (Springer, 2020)
      Transit authorities have been searching for the indicators to measure transit service quality and the key factors to attract citizens who do not prefer public transport. The recent advent of data collection technologies ...
    • ERP software selection using intuitionistic fuzzy and interval grey number-based MACBETH method 

      Yurtyapan, Mustafa Said; Aydemir,Erdal (Grey Systems: Theory and Application, 2021)
      Purpose – Enterprise Resource Planning (ERP) software which is a knowledge-based design on the interconnective communication of business units and information share, ensures that business processes such as finance, ...
    • Analysis of parameter changes of a neuronal network model using transfer entropy 

      Şengül Ayan, Sevgi; Gençağa, Deniz (International Advanced Researches and Engineering Journal, 2020)
      Understanding the dynamics of coupled neurons is one of the fundamental problems in the analysis of neuronal model dynamics. The transfer entropy (TE) method is one of the primary analyses to explore the information flow ...
    • Statistical approaches for the analysis of dependency among neurons under noise 

      Gençağa, Deniz; Şengül Ayan, Sevgi; Farnoudkia, Hajar; Okuyucu, Serdar (MDPI, 2020)
      Neuronal noise is a major factor affecting the communication between coupled neurons. In this work, we propose a statistical toolset to infer the coupling between two neurons under noise. We estimate these statistical ...
    • Mazeret/telafi sınavı çizelgeleme problemi için bir hedef programlama modeli 

      Saraç, Tuğba; Özçelik, Feristah; Erdoğan Akbulut, Hatice (Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi, 2020)
      Üniversitelerde ve diğer eğitim kurumlarında, sınav çakışması, sağlık problemleri vb. nedenlerle planlanan sınav dönemlerinde sınava giremeyen öğrencilere mazeret/telafi sınavları yapılmaktadır. Özellikle bu sınavlara ...
    • Investigation of the effects of IMPULS Maturity model with a simulation-based analysis 

      Altan, Cansu; Başarır, Ali Cem; Aydemir, Erdal (10th International Symposium onIntelligent Manufacturing and Service Systems, 2019)
      Industry 4.0 enables to produce products that are complex in production in a short time and in high quality by entering factories and making our production environments smarter. Industry 4.0 is defined as the digitization ...
    • A cost-effective framework for the optimal placement of drones in smart cities 

      Ülgen, Semail; Al-Turjman, Fadi; Daboul, Reda; Zahmatkesh, Hadi (CRC Press, 2019)
      This chapter presents the existing studies related to the use of unmanned aerial vehicles in the internet of things era. It outlines problem description and the proposed framework. The chapter discusses the performance ...
    • On conformal curves in 2-dimensional de sitter space 

      Şimşek, Hakan; Özdemir, Mustafa (Advances in Applied Clifford Algebras, 2016)
      In this paper, we examine the pseudo-spherical curves, which are equivalent to each other under the conformal maps preserving a fixed point in the de Sitter 2-space, by using the Clifford algebra Cl 2,1. Also, we find the ...