Zobrazeno 1 - 10
of 943
pro vyhledávání: '"Kaltsas, P."'
Wave dynamics in disordered open media is an intriguing topic, and has lately attracted a lot of attention in non-Hermitian physics, especially in photonics. In fact, spatial distributions of gain and loss elements are physically possible in the cont
Externí odkaz:
http://arxiv.org/abs/2410.09185
The Burgers hierarchy consists of nonlinear evolutionary PDEs with increasingly higher-order dispersive and nonlinear terms, resulting in a rich variety of soliton solutions. Notable members include the Burgers equation and the Sharma-Tasso-Olver equ
Externí odkaz:
http://arxiv.org/abs/2408.07027
Autor:
Kaltsas, Dimitrios A.
The effectiveness of the Physics Informed Neural Networks (PINNs) for learning the dynamics of constrained Hamiltonian systems is demonstrated using the Dirac theory of constraints for regular systems with holonomic constraints and systems with non-s
Externí odkaz:
http://arxiv.org/abs/2401.15485
Publikováno v:
Physics of Plasmas 31, 042503 (2024)
We extend previous work [Y. E. Litvinenko, Phys. Plasmas 17, 074502 (2010)] on a direct method for finding similarity reductions of partial differential equations such as the Grad-Shafranov equation, to the case of the generalized Grad-Shafranov equa
Externí odkaz:
http://arxiv.org/abs/2401.09061
Publikováno v:
Plasma Phys. Control. Fusion 66, 065016 (2024)
We derive axisymmetric equilibrium equations in the context of the hybrid Vlasov model with kinetic ions and massless fluid electrons, assuming isothermal electrons and deformed Maxwellian distribution functions for the kinetic ions. The equilibrium
Externí odkaz:
http://arxiv.org/abs/2309.16802
Equilibrium equations for magnetically confined, axisymmetric plasmas are derived by means of the energy-Casimir variational principle in the context of Hall magnetohydrodynamics (MHD). This approach stems from the noncanonical Hamiltonian structure
Externí odkaz:
http://arxiv.org/abs/2307.16091
Publikováno v:
J. Plasma Phys. 89, 905890403 (2023)
In this paper, we develop a one-dimensional (1-D), quasineutral, hybrid Vlasov-Maxwell equilibrium model with kinetic ions and massless fluid electrons and derive associated solutions. The model allows for an electrostatic potential that is expressed
Externí odkaz:
http://arxiv.org/abs/2304.01151
Autor:
Aris Kaltsas, Athanasios Zikopoulos, Fotios Dimitriadis, Danja Sheshi, Magdalena Politis, Efthalia Moustakli, Evangelos N. Symeonidis, Michael Chrisofos, Nikolaos Sofikitis, Athanasios Zachariou
Publikováno v:
Current Issues in Molecular Biology, Vol 46, Iss 8, Pp 8807-8834 (2024)
Erectile dysfunction (ED) is a prevalent condition affecting men’s sexual health, with oxidative stress (OS) having recently been identified as a significant contributing causative factor. This narrative review aims to elucidate the role of OS in t
Externí odkaz:
https://doaj.org/article/14f53966f44e4a09a32a52996dc05880
Autor:
Avinash Singh, Massimilano Pinto, Petros Kaltsas, Salvatore Pirozzi, Shifa Sulaiman, Fanny Ficuciello
Publikováno v:
Frontiers in Robotics and AI, Vol 11 (2024)
Prisma Hand II is an under-actuated prosthetic hand developed at the University of Naples, Federico II to study in-hand manipulations during grasping activities. 3 motors equipped on the robotic hand drive 19 joints using elastic tendons. The operati
Externí odkaz:
https://doaj.org/article/b8aa43b47a9042f3ab099df876e8cf73
Non-Hermitian topological systems simultaneously posses two antagonistic features: ultra sensitivity due to exceptional points and robustness of topological zero energy modes, and it is unclear which one prevails under different perturbations. We stu
Externí odkaz:
http://arxiv.org/abs/2203.02519