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Dr. Dimitris Vartziotis studied Aeronautical and Space Engineering (MSc) and Civil Engineering (MSc). He carried out his PhD Thesis in Computational Mechanics. He worked as a scientific executive in IBM Germany. He founded and manages the companies ΝΙΚΙ ΜΕΠΕ and TWT GmbH. TWT GmbH has been awarded first place for innovation and overall evaluation amongst the top German automotive companies. His research focuses on scientific technology and theoretical Mathematics. He publishes in international scientific journals of publishing houses such as Elsevier and Springer. Moreover, he is a reviewer for the European Mathematical Society (zbMATH) and the American Mathematical Society (AMS).
Dr. Dimitris Vartziotis, CEO and founder of TWT GmbH Science and Innovation has been named as “Best Automotive Innovation CEO 2020 (Germany)”. On-line magazine “CEO monthly” publishes this award. Learn more on Dr. Vartziotis’ accomplishment and how he shapes TWT towards becoming a knowledge society.
As a general manager of TWT GmbH and NIKI he was responsible for the development of the first Greek car “Aletis” for the Greek Vehicles Industry ΕΛΒΟ Α.Ε. in collaboration with Pininfarina (Italy). The first prototype of “Aletis” was presented at the international automotive exhibition IAA 2001 in Frankfurt.
Dimitris Vartziotis. Computing arithmetic series by expressing the summands as sum of ones, 10 December 2019 [DOI | http ]
Dimitris Vartziotis and Florian Pausinger. On the symmetry of finite sums of exponentials. arXiv:1810.01674, 3 October 2018 [ http ]
Dimitris Vartziotis, Doris Bohnet and Benjamin Himpel. GETOpt mesh smoothing: Putting GETMe in the framework of global optimization-based schemes. Finite Elements in Analysis and Design, Volume 147, S.10-20, 2018, 10.1016/j.finel.2018.04.010 [ DOI | http ]
Dimitris Vartziotis and Juri Merger. On geometric polygon transformations leading to anisotropy. arXiv:1805.01767, 4 May, 2018 [ http ]
Dimitris Vartziotis and Juri Merger. Contributions to the study of the non-trivial roots of the Riemann zeta-function. arXiv:1804.00913, 4 April, 2018 [ http ]
Dimitris Vartziotis and Doris Bohnet. Fractal Curves from Prime Trigonometric Series. Fractal and Fractional, Volume 2, 2018 [ http ]
Dimitris Vartziotis, Benjamin Himpel, and Markus Pfeil. Creation of higher-energy superposition quantum states motivated by geometric transformations. arXiv:1712.07963, 21 December, 2017. [ http ]
Dimitris Vartziotis and Joachim Wipper. The fractal nature of an approximate prime counting function. Fractal and Fractional, 1, 1-9, 2017 [ DOI | http ]
Dimitris Vartziotis and Doris Bohnet. A geometric mesh smoothing algorithm related to damped oscillations. Computer Methods in Applied Mechanics and Engineering 326C (2017), 102-121 [ DOI | http ]
Dimitris Vartziotis. Curvature Transformation. arXiv:1608.03898 [math.DG], 2016 [ http ]
Dimitris Vartziotis and Aristos Tzavellas. The ß-functions and their relation to the prime counting function. arXiv:1607.08521 [math.NT], 2016 [ http ]
Dimitris Vartziotis and Doris Bohnet. Existence of an attractor for a geometric tetrahedron transformation. Differential Geom. Appl., 49, 197-207,2016, [ DOI | http ]
Dimitris Vartziotis and Doris Bohnet. Von der Symmetriegruppe des Dreiecks zur Glättung von industriellen Netzen. In: Udo Beyer (Hrsg.): Die Basis der Vielfalt – 10. Tagung der DGfGG, Springer Vieweg, Wiesbaden, 2016, 207-217. [ DOI ]
Dimitris Vartziotis and Benjamin Himpel. Laplacian smoothing revisited. arXiv:1406.4333 [math.OC], 2014. [ http ]
Dimitris Vartziotis and Doris Bohnet. Convergence properties of a geometric mesh smoothing algorithm. arXiv:1411.3869, 17 November, 2014 [ http ]
Dimitris Vartziotis and Benjamin Himpel. Efficient mesh optimization using the gradient flow of the mean volume. SIAM J. Numer. Anal., 52(2), 1050–1075, 2014. [ DOI | http ]
Dimitris Vartziotis and Benjamin Himpel. Efficient and Global Optimization-Based Smoothing Methods for Mixed-Volume Meshes. Proceedings of the 22nd International Meshing Roundtable, Springer International Publishing, 2014, pp 293-311. [ DOI | http ]
Dimitris Vartziotis and Doris Bohnet. Regularizations of non-euclidean polygons. arXiv:1312.2500 [math.MG], 2013. [ http ]
Dimitris Vartziotis and Manolis Papadrakakis. Improved GETMe by adaptive mesh smoothing. Computer Assisted Methods in Engineering and Science, 20:55-71, 2013.
Dimitris Vartziotis, Joachim Wipper, and Manolis Papadrakakis. Improving mesh quality and finite element solution accuracy by GETMe smoothing in solving the poisson equation. Finite Elem. Anal. Des., 66:36-52, 2013.
Dimitris Vartziotis and Simon Huggenberger. Iterative geometric triangle transformations. Elem. Math., 67(2):68-83, 2012. [ DOI | http ]
Dimitris Vartziotis and Joachim Wipper. Fast smoothing of mixed volume meshes based on the effective geometric element transformation method. Comput. Methods Appl. Mech. Engrg., 201/204:65-81, 2012. [ DOI | http ]
Dimitris Vartziotis and Joachim Wipper. A dual element based geometric element transformation method for all-hexahedral mesh smoothing. Comput. Methods Appl. Mech. Engrg., 200(9-12):1186-1203, 2011. [ DOI | http ]
Dimitris Vartziotis and Joachim Wipper. Characteristic parameter sets and limits of circulant Hermitian polygon transformations. Linear Algebra Appl., 433(5):945-955, 2010.[ DOI | http ]
Dimitris Vartziotis and Joachim Wipper. On the Construction of Regular Polygons and Generalized Napoleon Vertices. Forum Geom., 9:213-223, 2009. [ html ]
Dimitris Vartziotis and Joachim Wipper. Classification of symmetry generating polygon-transformations and geometric prime algorithms. Math. Pannon., 20(2):167-187, 2009.
Dimitris Vartziotis and Joachim Wipper. The Geometric Element Transformation Method for Mixed Mesh Smoothing. Eng. Comput., 25(3):287-301, 2009.
Dimitris Vartziotis, Joachim Wipper, and Bernd Schwald. The geometric element transformation method for tetrahedral mesh smoothing. Comput. Methods Appl. Mech. Engrg., 199(1-4):169-182, 2009. [ DOI | http ]
Dimitris Vartziotis, Theodoros Athanasiadis, Iraklis Goudas, and Joachim Wipper. Mesh smoothing using the Geometric Element Transformation Method. Comput. Methods Appl. Mech. Engrg., 197(45-48):3760-3767, 2008. [ DOI ]
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