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pro vyhledávání: '"Kaltsas, A."'
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
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
Publikováno v:
Phys. Plasmas 29, 022506 (2022)
We present several numerical solutions to a generalized Grad-Shafranov equation (GGSE), which governs axisymmetric plasma equilibria with incompressible flows of arbitrary direction, using fully connected, feed-forward, deep neural networks, also kno
Externí odkaz:
http://arxiv.org/abs/2109.12850
Publikováno v:
Applied Sciences, Vol 14, Iss 15, p 6490 (2024)
This study focuses on the successful fabrication of a cost-effective strain sensor using exclusively additive manufacturing Fused Deposition Modeling (FDM) technology, enabling fast on-site production, which is particularly advantageous in maritime s
Externí odkaz:
https://doaj.org/article/c17deac558524b30a94e15727f9f5159
Autor:
Aris Kaltsas, Marios Stavropoulos, Evangelos N. Symeonidis, Zisis Kratiras, Athanasios Zachariou, Athanasios Zikopoulos, Efthalia Emmanouela Chrisofos, Fotios Dimitriadis, Nikolaos Sofikitis, Michael Chrisofos
Publikováno v:
Biomedicines, Vol 12, Iss 7, p 1481 (2024)
Endometriosis is a debilitating gynecological condition commonly seen in individuals designated female at birth; however, there has been limited research focused on its prevalence and impact among transgender men. This narrative review aims to fill a
Externí odkaz:
https://doaj.org/article/9385b6aae1cb4f8abb245b3cd8200287