Güncel Gönderiler: WOS İndeksli Yayınlar Koleksiyonu

Toplam kayıt 142, listelenen: 61-80

    • Heuristic modelling of traffic accident characteristics 

      Tercan, Emre; Beşdok, Erkan; Tapkın, Serkan (Taylor & Francis, 2020)
      Due to the complex structure of observation based traffic accident data and the absence of an analytic model to define their characteristics, different models are required. Accident characteristics have been modeled for ...

    • Design gyration number determination of 100 mm-diameter asphalt mixtures 

      Tapkın, Serkan; Keskin, Mustafa (Springer, 2019)
      At present, there is no accepted standard by highway authorities on the compaction procedures of 100 mm-diameter gyratory compactor specimens. In previous studies on gyratory compaction, the method of either coring from ...

    • Structure of conflict graphs in constraint alignment problems and algorithms 

      Alkan, Ferhat; Bıyıkoğlu, Türker; Demange, Marc; Erten, Cesim (Discrete Mathematics Theoretical Computer Science, 2019)
      We consider the constrained graph alignment problem which has applications in biological network analysis. Given two input graphs G1 = (V1, E1), G2 = (V2, E2), two vertices u1, v1 of G1 paired respectively to two vertices ...

    • Graph-theoretical comparison of normal and tumor networks in identifying BRCA genes 

      Erten, Cesim; Dopazo, Joaquin (BMC Systems Biology, 2017)
      Background: Identification of driver genes related to certain types of cancer is an important research topic. Several systems biology approaches have been suggested, in particular for the identification of breast cancer ...

    • 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 ...

    • Some results on p-shape curvatures of non-lightlike space curves 

      Şimşek, Hakan; Özdemir, Mustafa (International Electronic Journal of Geometry, 2018)
      In this paper, we obtain some findings for a non-null curve parameterized by spherical arc length. We investigate the relationship between a non-null curve with p-shape curvatures and pseudospherical curves on S21 and ...

    • Shape curvatures of the Lorentzian plane curves 

      Şimşek, Hakan; Özdemir, Mustafa (Communications Faculty of Sciences University of Ankara Series A1 Mathematics and Statistics, 2017)
      In this paper, we examine the Lorentzian similar plane curvesusing the hyperbolic structure and spherical arc length parameter. We classifyall self-similar Lorentzian plane curves and give formulas for pseudo shapecurvatures ...

    • Bäcklund’s theorem for n dimensional lorentzian submanifold in the minkowski space 𝔼21𝑛−1 

      Şimşek, Hakan; Özdemir, Mustafa (Results in Mathematics, 2016)
      In this paper, Bäcklund’s Theorem is introduced on the Lorentzian n-submanifold of the Minkowski space 𝔼2𝑛−11 by using the method of moving frames. Also, we prove the Integrability Theorem for the Lorentzian n-submanifold ...

    • Similar and self-similar curves in minkowski n-space 

      Şimşek, Hakan; Özdemir, Mustafa (Bulletin of Korean Mathematical Society, 2015)
      In this paper, we investigate the similarity transformations in the Minkowski n-space. We study the geometric invariants of nonnull curves under the similarity transformations. Besides, we extend the fundamental theorem ...

    • Generating hyperbolical rotation matrix for a given hyperboloid 

      Şimşek, Hakan; Özdemir, Mustafa (Linear Algebra and Its Applications, 2016)
      Hyperbolic rotation is hyperbolically the motion of a smooth object on general hyperboloids given by −a1x2+a2y2+a3z2=±λ, λ ∈R+. In this paper, we investigate the hyperbolical rotation matrices in order to get the motion ...

    • On the eigenvalues and eigenvectors of a lorentzian rotation matrix by using split quaternions 

      Özdemir, Mustafa; Erdoğdu, Melek; Şimşek, Hakan (Advances in Applied Clifford Algebras, 2014)
      In this paper, we examine eigenvalue problem of a rotation matrix in Minkowski 3 space by using split quaternions. We express the eigenvalues and the eigenvectors of a rotation matrix in term of the coefficients of the ...

    • On focal curves of null Cartan curves 

      Şimşek, Hakan (Turkish Journal of Mathematics, 2017)
      The focal curve, which is determined as the locus of centers of osculating pseudo-spheres of a null Cartan curve, is investigated in Minkowski (n+2)-space Mn+2. Moreover, a curve called acceleration focal curve of a null ...

    • Rotations on a lightcone in minkowski 3-Space 

      Şimşek, Hakan; Özdemir, Mustafa (Advances in Applied Clifford Algebras, Springer, 2017)
      In this paper the generalization of the rotations on any lightcone in Minkowski 3-space ℝ1,2𝑔 is given. The rotation motion on the lightcone is examined by means of a bilinear form and Lorentzian notions. We use the ...

    • Number of design gyrations for 100 mm compacted asphalt mixtures modified with polypropylene 

      Tapkın, Serkan; Keskin, Mustafa (Journal of Engineering Research, 2018)
      There is no standard accepted by highway authorities on the compaction procedures of 100 mm diameter gyratory compactor specimens. In previous studies on gyratory compaction, the utilisation of either coring from 150 mm ...

    • Beyond the institutional logics: international level systemic analysis of EU-Turkish relations 

      Cenker-Özek, Işıl Cerem; Oğuzlu, Tarık (Turkish Studies, 2013)
      This article aims to explain the slowing down of European Union (EU)–Turkish relations since the start of the accession negotiations in 2005 with international level systemic analysis. For this purpose, it examines the ...

    • Discussion networks in Turkey: a social capital approach to informal social relations 

      Cenker-Özek, Işıl Cerem (Southeast European and Black Sea Studies, 2019)
      The present study inquires into the informal social network underpinnings of generalized trust in Turkey. For this purpose, it utilizes survey data on Turkish discussion networks. The findings show that informal social ...

    • Civic space in Turkey: a social capital approach to civil society 

      Cenker-Özek, Işıl Cerem (Turkish Studies, 2017)
      The present study explores civil society organizations’ (CSOs) civic and political potential in Turkey. For this purpose, it generates original data from Antalya and utilizes social network analysis to analyze the CSOs’ ...

    • Accelerated weathering performance of Scots pine preimpregnated with copper based chemicals before varnish coating. Part II: Coated with water based varnish 

      Gündüz, Ahmet; Baysal, Ergün; Türkoğlu, Türkay; Küçüktüvek, Mustafa; Altay, Çağlar; Peker, Hüseyin; Toker, Hilmi (Wood Research, 2019)
      This study was designed to investigate some surface characteristics such as gloss, color, and surface hardness changes of Scots pine wood preimpregnated with some copper-based chemicals before varnish coating after accelerated ...

    • A comparative outline for quantifying risk ratings in occupational health and safety risk assessment 

      Gül, Muhammet; Ak, Muhammet Fatih (Journal of Cleaner Production, 2018)
      The concept of risk assessment has been introduced as an examination of safety in the workplace to enable assessments as to whether sufficient precautions have been taken or if more should be done to prevent potential harm. ...

    • AHP-TOPSIS integration extended with Pythagorean fuzzy sets for information security risk analysis 

      Ak, Muhammet Fatih; Gül, Muhammet (Complex & Intelligent Systems, 2019)
      Risk analysis (RA) contains several methodologies that object to ensure the protection and safety of occupational stakeholders. Multi attribute decision-making (MADM) is one of the most important RA methodologies that is ...