Results 81 to 90 of about 15,117 (175)
The Linearized Inverse Boundary Value Problem in Strain Gradient Elasticity
Mathematical Methods in the Applied Sciences, EarlyView.ABSTRACT In this paper we study the linearized version of the strain gradient elasticity equation in ℝ2$$ {\mathbb{R}}^2 $$ with constant coefficients and we prove that one can determine the two Lamé coefficients λ,μ$$ \lambda, \mu $$ as well as the internal strain gradient parameter g$$ g $$, as indicated by Mindlin in his revolutionary papers in 1963–
Antonios Katsampakos +1 more
wiley +1 more source
Scientific ReportsThe scientific community studies tight focusing of radially and azimuthally-polarized vector beams as it is a versatile solution for many applications.
Sushanta Kumar Pal, Leslie A. Rusch
doaj +1 more source
Symmetries of celestial amplitudes
Physics Letters B, 2019 Celestial amplitudes provide holographic imprints of four-dimensional scattering processes in terms of conformal correlation functions on a two-dimensional sphere describing Minkowski space at null infinity.
Stephan Stieberger, Tomasz R. Taylor
doaj +1 more source
Generalized MICZ-Kepler system, duality, polynomial and deformed oscillator algebras
, 2010 We present the quadratic algebra of the generalized MICZ-Kepler system in three-dimensional Euclidean space $E_{3}$ and its dual the four dimensional singular oscillator in four-dimensional Euclidean space $E_{4}$.
Ian Marquette +2 more
core +1 more source
Weak Solutions for a Class of Nonlocal Singular Problems Over the Nehari Manifold
Mathematical Methods in the Applied Sciences, EarlyView.ABSTRACT In this paper, we consider a nonlocal model of dilatant non‐Newtonian fluid with a Dirichlet boundary condition. By using the Nehari manifold and fibering map methods, we obtain the existence of at least two weak solutions, with sign information.
Zhenfeng Zhang +2 more
wiley +1 more source
Higher-order Poincaré spheres and spatiospectral Poincaré beams
Physical Review ResearchLight with a complex structure has become a powerful tool in many studies in classical and quantum optics. Here, we introduce a visual representation of light that is structured simultaneously in space, frequency, and polarization in the form of a higher-
R. Fickler, L. Kopf, M. Ornigotti
doaj +1 more source
PHYSICAL SPACE AND ABSTRACT SPACES—Klein Space, Poincaré Space and the Stereographic Projection
PhotonicsIn this paper we compare the rotation of a rigid body in the real three-dimensional Euclidean space E3 and its representation in the complex plane (Klein space), on one hand, with the transformation of polarization states of light (SOPs) by the phase ...
Tiberiu Tudor
doaj +1 more source
Adaptive Sliding‐Mode Control of a Perturbed Diffusion Process With Pointwise In‐Domain Actuation
International Journal of Robust and Nonlinear Control, EarlyView.ABSTRACT A sliding mode–based adaptive control law is proposed for a class of diffusion processes featuring a spatially‐varying uncertain diffusivity and equipped with several point‐wise actuators located at the two boundaries of the spatial domain as well as in its interior.
Paul Mayr +3 more
wiley +1 more source
Numerical Study of Polarization Dynamics in Optical Fibers with a Harmonically Rotating Birefringence Axis using Stokes Vectors Approach [PDF]
فیزیک کاربردی ایرانThe control and analysis of polarization dynamics in optical fibers in the presence of birefringence are important, particularly for sensitive applications such as quantum communications and optical sensors.
Somaye Zare +2 more
doaj +1 more source
Ether and Electrons in Relativity Theory [PDF]
, 2018 This chapter discusses the roles of ether and electrons in relativity theory. One of the most radical moves made by Albert Einstein was to dismiss the ether from electrodynamics.
Walter, Scott A.
core