Results 51 to 60 of about 1,096,865 (195)

Generating Helical Polymorphic Beams Using Dielectric Metasurfaces

open access: yesLaser &Photonics Reviews, EarlyView.
Helix‐shaped polymorphic beams are optical fields whose intensity maxima spiral around the propagation axis, enabling particle manipulation through attractive or repulsive forces. Traditionally requiring expensive spatial light modulators, metasurfaces now provide a compact, cost‐effective alternative. This work demonstrates general helical polymorphic
Maryam Setareh   +3 more
wiley   +1 more source

Analytic representation of the distributional finite Hankel transform

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1985
Various representations of finite Hankel transforms of generalized functions are obtained. One of the representations is shown to be the limit of a certain family of regular generalized functions and this limit is interpreted as a process of truncation ...
O. P. Singh, Ram S. Pathak
doaj   +1 more source

Parameter tuning for the NFFT based fast Ewald summation

open access: yesFrontiers in Physics, 2016
The computation of the Coulomb potentials and forces in charged particle systems under 3d-periodic boundary conditionsis possible in an efficient way by utilizing the Ewald summation formulas and applying the fast Fourier transform (FFT).
Franziska Nestler
doaj   +1 more source

A radial version of the Kontorovich-Lebedev transform in the unit ball [PDF]

open access: yesOpuscula Mathematica, 2011
In this paper we introduce a radial version of the Kontorovich-Lebedev transform in the unit ball. Mapping properties and an inversion formula are proved in \(L_p\)
Semyon B. Yakubovich, Nelson Vieira
doaj   +1 more source

Digital Twin‐Based Optimization of Service Availability in LEO Mega Constellations Considering Handover Delays in Open RAN

open access: yesInternational Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT As non‐terrestrial networks (NTNs) become integral to future 6G systems, ensuring seamless connectivity and service continuity over low Earth orbit (LEO) satellite constellations is essential. This work investigates the impact of open radio access network (RAN) functional splits on handover performance in NTNs, focusing on minimizing service ...
Siva Satya Sri Ganesh Seeram   +3 more
wiley   +1 more source

Applications of Fourier transform infrared spectroscopy [PDF]

open access: yes, 2012
Podeu consultar el llibre complet a: http://hdl.handle.net/2445/32166This article summarizes the basic principles of Fourier Transform Infrared Spectroscopy, with examples of methodologies and applications to different field ...
Ferrer i Felis, Núria
core   +4 more sources

Error Estimates on Approximating the Finite Fourier Transform of Complex-Valued Functions via a Pre-Grüss Inequality [PDF]

open access: yes, 2004
Some estimates for the error in approximating the Finite Fourier Transform in terms of exponential means via a pre-Grüss inequality for complex-valued functions are ...
Hanna, George T   +2 more
core   +3 more sources

A Dual‐Frequency Sensitivity Model for Optical Fibre Ultrasonic Sensors in Power Transformer Partial Discharge Detection

open access: yesHigh Voltage, EarlyView.
ABSTRACT The detection of partial discharges (PD) on the power transformer tank demands higher sensitivity in ultrasonic detection. To target the detection frequency band for sensor optimisation and enhance sensitivity, this paper presents a dual‐frequency sensitivity model for optical fibre ultrasonic sensors.
Sihan Wang   +4 more
wiley   +1 more source

The Dawson Transform and Its Operational Properties

open access: yesAxioms
We introduce and study an integral transform whose kernel is Dawson’s integral. The proposed transform is connected to the Fourier sine transform through a classical integral representation of Dawson’s function and to the Glasser transform through an ...
Osman Yürekli
doaj   +1 more source

Cauchy Problem for Equations with Fractional Differentiation Bessel Operator in the Space of Temperate Distributions

open access: yesNonlinear Analysis, 2003
The well-posedness of the Cauchy problem, mentioned in title, is studied. The main result means that the solution of this problem is usual C00 - function on the space argument, if the initial function is a real functional on the conjugate space to the ...
V. Litovchenko
doaj   +1 more source

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