Results 51 to 60 of about 17,220,730 (291)
Extinction of Fleming-Viot-type particle systems with strong drift
, 2011 We consider a Fleming-Viot-type particle system consisting of independently moving particles that are killed on the boundary of a domain. At the time of death of a particle, another particle branches.
Bieniek, Mariusz +2 more
core +3 more sources
Detection of Bessel beams with digital axicons
, 2014 We propose a simple method for the detection of Bessel beams with arbitrary radial and azimuthal indices, and then demonstrate it in an all-digital setup with a spatial light modulator.
Forbes, Andrew +6 more
core +1 more source
Multilevel axicon for perfect optical vortex generation [PDF]
EPJ Web of Conferences, 2019 We present the fabrication of a beam shaper with 32 levels for the generation of nondiffractive optical fields representing quasi-Bessel beams of order zero.
Tudor Rebeca +3 more
doaj +1 more source
Dynamics of Twisted Electron Impact Ionization of CH4 and NH3 Molecule
Atoms, 2023 Electron vortex beams (EVBs, also known as twisted electron beams) possess an intrinsic orbital angular momentum (OAM) with respect to their propagation direction.
Nikita Dhankhar, Neha, Rakesh Choubisa
doaj +1 more source
Squared Bessel Process with Delay [PDF]
, 2016 We discuss a generalization of the well known squared Bessel process with real nonnegative parameter $\delta$ by introducing a predictable almost everywhere positive process $\gamma(t,\omega)$ into the drift and diffusion terms. The resulting generalized
Hughes, Harry Randolph +1 more
core +2 more sources
Advanced Functional Materials, EarlyView.This research applies advanced laser beam shaping (LCoS‐SLM) to fabricate the Ti‐6Al‐4V alloy via laser powder bed fusion. A tailored beam is used to prevent martensite formation and create a dual α+β microstructure by controlling cooling rates.
Reza Esmaeilzadeh +8 more
wiley +1 more source
Asymptotic behavior of critical irreducible multi-type continuous state and continuous time branching processes with immigration [PDF]
, 2015 Under natural assumptions, a Feller type diffusion approximation is derived for critical, irreducible multi-type continuous state and continuous time branching processes with immigration.
Barczy, Matyas, Pap, Gyula
core +2 more sources
Double Helical Plasmonic Antennas
Advanced Functional Materials, EarlyView.Plasmonic double helical antennas funnel circularly polarized light to the nanoscale, offering strong chiroptical interaction and directional light emission. Extending a single helix design tool, this study combines numerical modeling with experimental validation, revealing large, broadband dissymmetry factors in the visible range.
Aleksei Tsarapkin +7 more
wiley +1 more source
BESSEL BEAM GENERATED BY THE ZERO-INDEX METALENS
Progress In Electromagnetics Research, 2022 Bessel beam is an important propagation-invariant optical field. The size and shape of its central spot remain unchanged in the long-distance transmission process, which has a wide application prospect.
F. Deng +7 more
semanticscholar +1 more source
On Schr\"odinger's equation, 3-dimensional Bessel bridges, and passage time problems
, 2010 In this work we relate the density of the first-passage time of a Wiener process to a moving boundary with the three dimensional Bessel bridge process and a solution of the heat equation with a moving boundary.
Hernandez-del-Valle, Gerardo
core +1 more source