Kostas Kleidis
Associate Professor Kostas Kleidis is a Faculty Member of the Mechanical Engineering Department at the International Hellenic University, Greece (since March 2010), and Head of the Department since September 2010.
He was born in Drama, Greece, on July 18, 1967. He obtained the B.Sc. in Physics (1990) and the Ph.D. in Astrophysics and Cosmology (1999) from the Aristotle University of Thessaloniki, Greece. He worked as Scientific Associate in the Departments of Mechanical Engineering and Civil Engineering at the Technological Education of Central Macedonia, Greece (1999 – 2009), as Research Associate in the Laboratory of Astronomy at the Aristotle University of Thessaloniki, Greece (2004 – 2006), and as Collaborating Faculty Member in the Faculty of Natural Sciences and Technology of the Hellenic Open University, at Patras, Greece (2000 – 2006).
His scientific interests include: General relativity, theoretical cosmology, quantum gravity. He has published forty (40) papers of original research in international refereed journals, one (1) chapter in refereed special volumes (book), and eleven (11) papers in refereed proceedings of international conferences and workshops. There are two hundred and fifty (250) citations to his work (h-index: 10).
He has participated in seven (7) scientific and two (2) educational projects, in fifteen (15) international and five (5) local meetings, as well as in three (3) international summer schools – he has delivered thirty-five (35) lectures on subjects related to his work. He was member of the Organizing Committee in two (2) international conferences and two (2) summer schools (in one of them, as Head of the Committee). He served as Guest Editor of the international scientific journal Entropy (MDPI) for the Special Issue "Dark Energy", and he is the Guest Editor of the Special Issue “Advances in Loop Quantum Cosmology” for the international scientific journal Galaxies (MDPI). He serves as Referee for twenty (20) international scientific journals. He was the Head of the Scientific Committee of the 1st Balkan Physics Olympiad (2019 BPO).
He is a member of the Hellenic Physical Society, the Hellenic Astronomical Society, and the Hellenic Society of Relativity, Gravity & Cosmology. He is also a member of the European Astronomical Society and the American Mathematical Society.
He teaches Calculus, Differential Equations, Numerical Analysis and Operational Research to undergraduate students – Applied Thermodynamics and Operational Research to postgraduate students.
He is married to Stavroula Kyriakidou and they have three daughters.
Home address: 3, K. Palaiologou Street, 60100 Katerini, Greece.
Phone: +30-23510-20565
Work address: Department of Mechanical Engineering, International Hellenic University, Serres Campus, 62124 Serres, Greece.
Phone: +30-23210-49122
e-mail: kleidis@teiser.gr, webpage: http://teachers.teicm.gr/kleidis
Supervisors: Demetrios B. Papadopoulos
Phone: +30-23210-49122
Address: Department of Mechanical Engineering, Technological Education Institute of Central Macedonia, End of Magnesias Street, 62124 Serres, Greece
He was born in Drama, Greece, on July 18, 1967. He obtained the B.Sc. in Physics (1990) and the Ph.D. in Astrophysics and Cosmology (1999) from the Aristotle University of Thessaloniki, Greece. He worked as Scientific Associate in the Departments of Mechanical Engineering and Civil Engineering at the Technological Education of Central Macedonia, Greece (1999 – 2009), as Research Associate in the Laboratory of Astronomy at the Aristotle University of Thessaloniki, Greece (2004 – 2006), and as Collaborating Faculty Member in the Faculty of Natural Sciences and Technology of the Hellenic Open University, at Patras, Greece (2000 – 2006).
His scientific interests include: General relativity, theoretical cosmology, quantum gravity. He has published forty (40) papers of original research in international refereed journals, one (1) chapter in refereed special volumes (book), and eleven (11) papers in refereed proceedings of international conferences and workshops. There are two hundred and fifty (250) citations to his work (h-index: 10).
He has participated in seven (7) scientific and two (2) educational projects, in fifteen (15) international and five (5) local meetings, as well as in three (3) international summer schools – he has delivered thirty-five (35) lectures on subjects related to his work. He was member of the Organizing Committee in two (2) international conferences and two (2) summer schools (in one of them, as Head of the Committee). He served as Guest Editor of the international scientific journal Entropy (MDPI) for the Special Issue "Dark Energy", and he is the Guest Editor of the Special Issue “Advances in Loop Quantum Cosmology” for the international scientific journal Galaxies (MDPI). He serves as Referee for twenty (20) international scientific journals. He was the Head of the Scientific Committee of the 1st Balkan Physics Olympiad (2019 BPO).
He is a member of the Hellenic Physical Society, the Hellenic Astronomical Society, and the Hellenic Society of Relativity, Gravity & Cosmology. He is also a member of the European Astronomical Society and the American Mathematical Society.
He teaches Calculus, Differential Equations, Numerical Analysis and Operational Research to undergraduate students – Applied Thermodynamics and Operational Research to postgraduate students.
He is married to Stavroula Kyriakidou and they have three daughters.
Home address: 3, K. Palaiologou Street, 60100 Katerini, Greece.
Phone: +30-23510-20565
Work address: Department of Mechanical Engineering, International Hellenic University, Serres Campus, 62124 Serres, Greece.
Phone: +30-23210-49122
e-mail: kleidis@teiser.gr, webpage: http://teachers.teicm.gr/kleidis
Supervisors: Demetrios B. Papadopoulos
Phone: +30-23210-49122
Address: Department of Mechanical Engineering, Technological Education Institute of Central Macedonia, End of Magnesias Street, 62124 Serres, Greece
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magnetic field can be amplified due to a potential energy transfer from the GW to the electromagnetic (EM) degrees of freedom. The evolution of the perturbed quantities depends on four free parameters, namely, the conductivity of the fluid, σ; the speed of sound square, 1/3 < (Cs/c)^2 ≡ γ < 1, which in this model may serve also as a measure of the inherent anisotropy; the GW frequency, ωg; and the associated angle of propagation with respect to the direction of the magnetic field, θ. We find that GW propagation in the anisotropic magnetized medium under consideration does excite several MHD modes; in other words, there is energy transfer from the gravitational to the EM degrees of freedom
that can result in the acceleration of charged particles at the spot and in the subsequent damping of the GW.
scalar field is considered, to guarantee the renormalizability of the energymomentum
tensor in a multi-dimensional curved spacetime. According to it, a
self-consistent coupling between the square curvature term R^2 and the quantum
field is introduced. The subsequent interaction discards any higher-order
derivative terms from the gravitational field equations, but, in the expense,
it introduces a geometric source term in the wave equation for the quantum
field. Unlike the conformal coupling case, this term does not represent an
additional ”mass” and, therefore, the quantum field interacts with gravity in
a generic way and not only through its mass (or energy) content.
magnetic field can be amplified due to a potential energy transfer from the GW to the electromagnetic (EM) degrees of freedom. The evolution of the perturbed quantities depends on four free parameters, namely, the conductivity of the fluid, σ; the speed of sound square, 1/3 < (Cs/c)^2 ≡ γ < 1, which in this model may serve also as a measure of the inherent anisotropy; the GW frequency, ωg; and the associated angle of propagation with respect to the direction of the magnetic field, θ. We find that GW propagation in the anisotropic magnetized medium under consideration does excite several MHD modes; in other words, there is energy transfer from the gravitational to the EM degrees of freedom
that can result in the acceleration of charged particles at the spot and in the subsequent damping of the GW.
scalar field is considered, to guarantee the renormalizability of the energymomentum
tensor in a multi-dimensional curved spacetime. According to it, a
self-consistent coupling between the square curvature term R^2 and the quantum
field is introduced. The subsequent interaction discards any higher-order
derivative terms from the gravitational field equations, but, in the expense,
it introduces a geometric source term in the wave equation for the quantum
field. Unlike the conformal coupling case, this term does not represent an
additional ”mass” and, therefore, the quantum field interacts with gravity in
a generic way and not only through its mass (or energy) content.