Results 41 to 50 of about 129,126 (304)

Q-Extension of Starlike Functions Subordinated with a Trigonometric Sine Function

open access: yesMathematics, 2020
The main purpose of this article is to examine the q-analog of starlike functions connected with a trigonometric sine function. Further, we discuss some interesting geometric properties, such as the well-known problems of Fekete-Szegö, the necessary and ...
Saeed Islam   +4 more
doaj   +1 more source

Generalized translation invariant valuations and the polytope algebra [PDF]

open access: yes, 2015
We study the space of generalized translation invariant valuations on a finite-dimensional vector space and construct a partial convolution which extends the convolution of smooth translation invariant valuations.
Bernig, Andreas, Faifman, Dmitry
core  

Accelerating Luminescence in Nanostructures: Exploring the Physical Limits and Impact of Ultrafast Emission in Nanoscale Materials

open access: yesAdvanced Photonics Research, EarlyView.
This review highlights recent advances in accelerating luminescence in nanostructures through cooperative emission, resonator coupling, and nonlocal light–matter interactions. By unifying concepts such as excitonic superradiance, superfluorescence, and the plasmonic Purcell effect, it reveals physical limits of ultrafast emission and their potential ...
Masaaki Ashida   +3 more
wiley   +1 more source

A Note on Wave Equation and Convolutions

open access: yesDifferential Equations and Nonlinear Mechanics, 2007
We study the first-order nonhomogenous wave equation. We extend the convolution theorem into a general case with a double convolution as the nonhomogenous term.
Adem Kiliçman, Hassan Eltayeb
doaj   +1 more source

Solving Partial Integro-Differential Equations via Double Formable Transform

open access: yesApplied Computational Intelligence and Soft Computing, 2022
In this study, we present a new double integral transform called the double formable transform. Several properties and theorems related to existing conditions, partial derivatives, the double convolution theorem, and others are presented.
Bayan Ghazal   +2 more
doaj   +1 more source

Sleep Alters the Velocity of Physiological Brain Pulsations in Humans

open access: yesAdvanced Science, EarlyView.
Sleep alters I/CSF oscillatory flow, driven by increased respiratory (29%) and vasomotor pulsation (21%) velocities, while cardiovascular pulsations decreased by (22%). Velocity is quantified using optical flow analysis of MREG data. Spectral power increases alongside these pulsations (spatial correlation, r = 0.35 and r = 0.39, respectively ...
Ahmed Elabasy   +13 more
wiley   +1 more source

Trigonometric words ranking model for spam message classification

open access: yesIET Networks, EarlyView., 2022
Abstract The significant increase in the volume of fake (spam) messages has led to an urgent need to develop and implement a robust anti‐spam method. Several of the current anti‐spam systems depend mainly on the word order of the message in determining the spam message, which results in the system's inability to predict the correct type of message when
Suha Mohammed Hadi   +7 more
wiley   +1 more source

A Convolution Theorem Related to Quaternion Linear Canonical Transform

open access: yesAbstract and Applied Analysis, 2019
We introduce the two-dimensional quaternion linear canonical transform (QLCT), which is a generalization of the classical linear canonical transform (LCT) in quaternion algebra setting. Based on the definition of quaternion convolution in the QLCT domain
Mawardi Bahri, Ryuichi Ashino
doaj   +1 more source

Membrane‐Mediated Force Transduction Drives Stick‐Slip Motion of Lipid Vesicles

open access: yesAdvanced Science, EarlyView.
A rotating magnetic field actuates a ferromagnetic particle inside a lipid vesicle, generating internal flows that induce stick‐slip propulsion near a surface. Membrane properties—elasticity, excess area, and phase behavior—modulate this motion by shaping stress dissipation and force transduction.
Paula Magrinya   +3 more
wiley   +1 more source

On uniqueness of recovering the convolution integro-differential operator from the spectrum of its non-smooth one-dimensional perturbation

open access: yesBoundary Value Problems, 2018
We consider a one-dimensional perturbation of the convolution integro-differential operator of arbitrary order on a finite interval. The inverse problem of recovering the convolution component from the spectrum is studied, provided that the perturbation ...
S. A. Buterin, S. V. Vasiliev
doaj   +1 more source

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