Metasurface tessellation for reconfigurable electromagnetic scatteringMetasurfaces have attracted significant research interest owing to their unprecedented control over the spatial distributions of electromagnetic fields. Herein we propose the concept of metasurface…Xiangdong Kong, Chuanning Niu, Jia Zhao et al.·Nov 19, 2020SaveLearn
Bateman Oscillators: Caldirola-Kanai and Null Lagrangians and Gauge FunctionsThe Lagrange formalism is developed for Bateman oscillators, which include both damped and amplified systems, and a novel method to derive the Caldirola-Kanai and null Lagrangians is presented. For…L. C. Vestal, Z. E. Musielak·Nov 18, 2020SaveLearn
Perturbations of circuit evolution matrices with Jordan blocksIn our prior studies we synthesized special circuits possessing evolution matrices that involve nontrivial Jordan blocks and the corresponding degenerate eigenfrequencies. The degeneracy of this type…Alexander Figotin·Nov 18, 2020SaveLearn
Motion of the heavy symmetric top when magnitudes of conserved angular momenta are differentA symmetric top or gyroscope can start its motion with different initial values. One can not decide the motion type only by looking at these initial values. For example, in a motion, precession…Vedat Tanriverdi·Nov 16, 2020SaveLearn
Continuous anisotropic damage as a twin modelling of discrete bi-dimensional fractureIn this contribution, the use of discrete simulations to formulate an anisotropic damage model is investigated. It is proposed to use a beam-particle model to perform numerical characterization…C Oliver-Leblond, R Desmorat, Boris Kolev·Nov 16, 2020SaveLearn
Multipolar engineering of subwavelength dielectric particles for scattering enhancementElectromagnetic scattering on subwavelength structures keeps attracting attention owing to abroad range of possible applications, where this phenomenon is in use. Fundamental limits of scattering…S. D. Krasikov, M. A. Odit, D. A. Dobrykh et al.·Nov 11, 2020SaveLearn
The Effects of Robin Boundary Condition on Thermal Convection in a Rotating Spherical ShellConvection in a spherical shell is widely used to model fluid layers of planets and stars. The choice of thermal boundary conditions in such models is not always straightforward. To understand the…Thibaut Clarté, Nathanaël Schaeffer, Stéphane Labrosse et al.·Nov 6, 2020SaveLearn
Four spacetime dimensional simulation of rheological waves in solids and the merits of thermodynamicsThe recent results attained from a thermodynamically conceived numerical scheme applied on wave propagation in viscoelastic/rheological solids are generalized here, both in the sense that the scheme…Áron Pozsár, Mátyás Szücs, Róbert Kovács et al.·Nov 1, 2020SaveLearn
Olbertian partition function in scalar field theoryThe Olbertian partition function is reformulated in terms of continuous (Abelian) fields described by the Landau-Ginzburg action, respectively Hamiltonian. In order do make some progress, the…R. A. Treumann, Wolfgang Baumjohann·Oct 31, 2020SaveLearn
Exact closed-form and asymptotic expressions for the electrostatic force between two conducting spheresWe present exact closed-form expressions and complete asymptotic expansions for the electrostatic force between two charged conducting spheres of arbitrary sizes. Using asymptotic expansions of the…Shubho Banerjee, Thomas Peters, Nolan Brown et al.·Oct 30, 2020SaveLearn
Influence of lunisolar tides on plants. Parametric resonance induced by periodic variations of gravityRecent experiments conducted in the International Space Station highlight the apparent periodicity of leaf oscillations and other biological phenomena associated with rhythmic variations of lunisolar…Henri Gouin·Oct 30, 2020SaveLearn
Negative flow of energy in a mechanical waveA classical system, which is analogous to the quantum one with a backflow of probability, is proposed. The system consists of a chain of masses interconnected by springs, as well attached by other…A. Matulis, A. Acus·Oct 29, 2020SaveLearn
An interesting track for the BrachistochroneIf a particle has to fall first vertically 1 m from A and then move horizontally 1 m to B, it takes a time t(=τ1+τ2=τ3=3/2g)=0.67 s. Under gravity and without friction, if it sides down…Zafar Ahmed, Amal Nathan Joseph·Oct 29, 2020SaveLearn
Observation of an accidental bound state in the continuum in a chain of dielectric disksBeing a general wave phenomenon, bound states in the continuum (BICs) appear in acoustic, hydrodynamic, and photonic systems of various dimensionalities. Here, we report the first experimental…M. S. Sidorenko, O. N. Sergaeva, Z. F. Sadrieva et al.·Oct 28, 2020SaveLearn
Second gradient electrodynamics: a non-singular relativistic field theoryIn this paper, we give the covariant formulation of second gradient electrodynamics, which is a generalized electrodynamics of second order including derivatives of higher order. The relativistic…Markus Lazar, Jakob Leck·Oct 26, 2020SaveLearn
High speed escape from a circular orbitYou have a rocket in a high circular orbit around a massive central body (a planet, or the Sun) and wish to escape with the fastest possible speed at infinity for a given amount of fuel.Philip Blanco, Carl Mungan·Oct 26, 2020SaveLearn
A coupled electromagnetic-thermomechanical approach for the modeling of electric motorsFuture developments of lighter, more compact and powerful motors-driven by environmental and sustainability considerations in the transportation industry-involve higher stresses, currents and…N Hanappier, E Charkaluk, N Triantafyllidis·Oct 26, 2020SaveLearn
Creating deterministic collisions between two orbiting bodiesWe aim to create deterministic collisions between orbiting bodies by applying a time-dependent external force to one or both bodies, whether the bodies are mutually repulsive, as in the two- or…Akhtar Munir, Barry C. Sanders·Oct 25, 2020SaveLearn
Analytical Dynamics Development of the Canonical EquationsIt is most common to construct the Hamiltonian function and Hamilton's canonical equations through a Legendre transformation of the Lagrangean function or through the central equation. These…John E. Hurtado·Oct 20, 2020SaveLearn
Endo-irreversible thermo-mechanical engine with new concept of entropy production action coefficientThermostatics of CARNOT engines has been extended by more recent research based on endo-reversible model. Our model assumes exo-reversibility but endo-irreversibility to determine new upper-bound to…Michel Feidt, Renaud Feidt·Oct 15, 2020SaveLearn
Spherical-harmonic tensorsThe connection between spherical harmonics and symmetric tensors is explored. For each spherical harmonic, a corresponding traceless symmetric tensor is constructed. These tensors are then extended…Francisco Gonzalez Ledesma, Matthew Mewes·Oct 13, 2020SaveLearn
Leaking elastic capacitor as model for active matterWe introduce the "leaking elastic capacitor" (LEC) model, a nonconservative dynamical system that combines simple electrical and mechanical degrees of freedom. We show that an LEC connected…Robert Alicki, David Gelbwaser-Klimovsky, Alejandro Jenkins·Oct 12, 2020SaveLearn
Dynamic Green's functions in discrete flexural systemsThe paper presents an analysis of the dynamic behaviour of discrete flexural systems composed of Euler--Bernoulli beams. The canonical object of study is the discrete Green's function, from which…K. H. Madine, D. J. Colquitt·Oct 9, 2020SaveLearn
Spatial transient behavior in waveguides with lossy impedance boundary conditionsAttenuation in acoustic waveguides with lossy impedance boundary conditions are associated with non-Hermitian and non-normal operators. This subject has been extensively studied in fundamental and…Wei Guo, Juan Liu, Wenping Bi et al.·Oct 7, 2020SaveLearn
The divergence and curl in arbitrary basisIn this work, the divergence and curl operators are obtained using the coordinate free non rigid basis formulation of differential geometry. Although the authors have attempted to keep the…Waleska P. F. de Medeiros, Rodrigo R. de Lima, Vanessa C. de Andrade et al.·Oct 6, 2020SaveLearn