Results 31 to 40 of about 19,387 (303)
Classical Superintegrable Systems in a Magnetic Field that Separate in Cartesian Coordinates [PDF]
Symmetry, Integrability and Geometry: Methods and Applications, 2020 We consider superintegrability in classical mechanics in the presence of magnetic fields. We focus on three-dimensional systems which are separable in Cartesian coordinates. We construct all possible minimally and maximally superintegrable systems in this class with additional integrals quadratic in the momenta.
Marchesiello, Antonella, Šnobl, Libor
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Transformation procedures in 3D terrestrial coordinate systems [PDF]
Acta Montanistica Slovaca, 2001 Transformation procedures belong to the main tasks of surveyor working in a field of geodesy, for example in satellite geodesy or astronomical geodesy.
Sedlák Vladimír
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Applied Sciences, 2022 The paper is aimed at an assessment of the importance of the coordinate system (Cartesian vs. cylindrical) assumed for simulations of free-round jets.
Karol Wawrzak, Artur Tyliszczak
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New infinite families of Nth-order superintegrable systems separating in Cartesian coordinates [PDF]
Journal of Physics A: Mathematical and Theoretical, 2020 Abstract A study is presented of superintegrable quantum systems in two-dimensional Euclidean space E 2 allowing the separation of variables in Cartesian coordinates. In addition to the Hamiltonian H and the second order integral of motion X, responsible for the separation of variables, they allow a third integral that ...
A M Escobar-Ruiz +2 more
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Analytical solution to swing equations in power grids.
PLoS ONE, 2019 OBJECTIVE:To derive a closed-form analytical solution to the swing equation describing the power system dynamics, which is a nonlinear second order differential equation.
HyungSeon Oh, HyungSeon Oh
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Analytic solutions of a two-fluid hydrodynamic model
Mathematical Modelling and Analysis, 2021 We investigate a one dimensional flow described with the non-compressible coupled Euler and non-compressible Navier-Stokes equations in the Cartesian coordinate system.
Imre Ferenc Barna, László Mátyás
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Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background Myasthenia gravis (MG) is a rare disorder characterized by fluctuating muscle weakness with potential life‐threatening crises. Timely interventions may be delayed by limited access to care and fragmented documentation. Our objective was to develop predictive algorithms for MG deterioration using multimodal telemedicine data ...
Maike Stein +7 more
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Advanced Engineering Materials, EarlyView.A two‐step approach combining laser powder bed fusion of FeSi electrical steel with Bakelite infiltration enables the fabrication of multifunctional gyroid lattice composites. The resulting structures exhibit high strength, magnetic anisotropy, and complete polymer infiltration, demonstrating a simple and scalable route toward lightweight, mechanically
Angelo F. Andreoli +9 more
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A novel laser-based stereotactic localization device for intracranial mass resection
Brain Hemorrhages, 2021 Unfortunately, both frame-based and frameless stereotactic neuronavigation platforms are far from ubiquitous in global neurosurgery, and many facilities lack accurate localization technology to ensure the safety of intracranial surgery such as cerebral ...
Dan Tang, Jose M. Soto, Lingyun Zhang
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Advanced Functional Materials, EarlyView.This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger +11 more
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