Results 41 to 50 of about 4,246 (261)

Phase Topology Stability of an Optical Vortex via an Electrically Controlled Twist‐Planar Oriented Liquid Crystal Fresnel Lens

open access: yesAdvanced Optical Materials, EarlyView.
A simple and efficient method for determining the stability of optical vortices via Fourier transform using a conventional spherical lens is presented. The theoretical and experimental results demonstrate a practical approach to directly and unambiguously measure the magnitude and sign of the topological charge of a beam without altering an ...
Elena Melnikova   +5 more
wiley   +1 more source

Modelling smurfing patterns in cryptocurrencies with integer partitions

open access: yesIET Blockchain
In this paper, we propose the modelling of patterns of financial transactions ‐ with a focus on the domain of cryptocurrencies ‐ as splittings and present a method for generating such splittings utilizing integer partitions.
Marlene Koelbing   +4 more
doaj   +1 more source

A hardware-oriented concurrent TZ search algorithm for High-Efficiency Video Coding

open access: yesEURASIP Journal on Advances in Signal Processing, 2017
High-Efficiency Video Coding (HEVC) is the latest video coding standard, in which the compression performance is double that of its predecessor, the H.264/AVC standard, while the video quality remains unchanged.
Nghia Doan   +3 more
doaj   +1 more source

Terahertz Volume Plasmon‐Polariton Modulation in All‐Dielectric Hyperbolic Metamaterials

open access: yesAdvanced Optical Materials, EarlyView.
THz volume plasmon‐polariton (VPP) propagation through plasmon‐based hyperbolic metamaterials, made of alternating layers of doped and undoped III‐V semiconductors. Abstract The development of plasmonics and related applications in the terahertz range faces limitations due to the intrinsic high electron density of the standard metals.
Stefano Campanaro   +3 more
wiley   +1 more source

On the Distribution of the H-index

open access: yesInternational Journal of Information Science and Management, 2018
The h-index has been considered in terms of both unrestricted integer partitions and fuzzy integrals, and the expected value of h for a given number of citations has been estimated.
Simon Brown
doaj  

Efficient calculation of the number of partitions of the set into subsets satisfying

open access: yesMathematics Open
Consider the set [Formula: see text]. We are interested in determining the number of partitions of this set into subsets of three elements each, where the sum of two of the elements equals the third.
Christian Hercher, Frank Niedermeyer
doaj   +1 more source

Generalized Beatty sequences

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1978
A well-known result due to S. Beatty is that if α and β are positive irrational numbers satisfying α−1+β−1=1 then each positive integer is to be found in precisely one of the sequences {[kα]}, {[kβ]}(k=1,2,3,…) where [x] denotes the integral part of x ...
A. McD. Mercer
doaj   +1 more source

Counting monster potentials

open access: yesJournal of High Energy Physics, 2021
We study the large momentum limit of the monster potentials of Bazhanov-Lukyanov-Zamolodchikov, which — according to the ODE/IM correspondence — should correspond to excited states of the Quantum KdV model.
Riccardo Conti, Davide Masoero
doaj   +1 more source

Multipolar Resonances in Electro‐Optic Metasurfaces with Moderate Refractive Index

open access: yesAdvanced Photonics Research, EarlyView.
Electro‐optic nanoantennas with moderate refractive indices of 2.3 to 3.0 are numerically shown to sustain strong multipolar resonances, enabling efficient light confinement and EO tuning. Multipolar modes of even parity are most sensitive to variations in the refractive index.
Viktoriia E. Babicheva   +1 more
wiley   +1 more source

Continuum Mechanics Modeling of Flexible Spring Joints in Surgical Robots

open access: yesAdvanced Robotics Research, EarlyView.
A new mechanical model of a tendon‐actuated helical extension spring joint in surgical robots is built using Cosserat rod theory. The model can implicitly handle the unknown contacts between adjacent coils and numerically predict spring shapes from straight to significantly bent under actuation forces.
Botian Sun   +3 more
wiley   +1 more source

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