Results 31 to 40 of about 71,208 (194)

Observational constraints and preheating in cuscuton inflation

open access: yesEuropean Physical Journal C: Particles and Fields, 2023
We study cuscuton inflation for the models where the potential of the cuscuton takes quadratic and exponential forms. We find that for the quadratic potential, a scalar spectral index $$n_s$$ n s is not affected by cuscuton at the leading order in the ...
Phongpichit Channuie   +2 more
doaj   +1 more source

Magnetic Vortex Core String Gyrotropic Oscillations in Thick Cylindrical Dots

open access: yesMagnetism, 2022
The nonuniform magnetic vortex gyrotropic oscillations along the cylindrical dot thickness were calculated. A generalized Thiele equation was used for describing the vortex core motion including magnetostatic and exchange forces.
Konstantin Guslienko
doaj   +1 more source

Mathieu functions and its useful approximation for elliptical waveguides

open access: yesEPJ Web of Conferences, 2017
The standard form of the Mathieu differential equation is d2ydη2+(a−2qcos2η)y=0 where a and q are real parameters and q > 0. In this paper we obtain closed formula for the generic term of expansions of modified Mathieu functions in terms of Bessel and ...
Pillay Shamini, Kumar Deepak
doaj   +1 more source

Elliptical beams [PDF]

open access: yes, 2008
A very general beam solution of the paraxial wave equation in elliptic cylindrical coordinates is presented. We call such a field an elliptic beam (EB).
Bandres, Miguel A.   +1 more
core   +1 more source

Study of pulsatile pressure-driven electroosmotic flows through an elliptic cylindrical microchannel with the Navier slip condition

open access: yesAdvances in Difference Equations, 2017
This paper aims to study an unsteady electric field-driven and pulsatile pressure-driven flow of a Newtonian fluid in an elliptic cylindrical microchannel with Navier boundary wall slip.
Pearanat Chuchard   +2 more
doaj   +1 more source

Dynamical Behavior of Fractional-Order Delayed Feedback Control on the Mathieu Equation by Incremental Harmonic Balance Method

open access: yesShock and Vibration, 2022
In this study, the dynamical analysis of the Mathieu equation with multifrequency excitation under fractional-order delayed feedback control is investigated by the incremental harmonic balance method (IHBM).
Shaofang Wen   +3 more
doaj   +1 more source

A Lie group treatment on a generalized evolution Fisher type equation with variable coefficients

open access: yesResults in Physics, 2023
In this study, a general second-order evolution equation of the Fisher-type, with time-dependent variable coefficients, is considered. This equation contains many well-known equations, and obtained results may be applicable in investigating other ...
Shao-Wen Yao   +2 more
doaj   +1 more source

Effect of space charge potential on the behavior of confined gaseous 238UF6 ions in paul ion trap [PDF]

open access: yesمجله علوم و فنون هسته‌ای, 2020
This paper examined the behavior of confined 238UF6 gaseous ions in Paul’s quadrupole mass spectrometer under the influence of the field induced by the RF and DC potential applied to the end cap and ring electrodes and space charge potential, based on ...
N. Pishbin   +4 more
doaj   +1 more source

On the motion of spinning test particles in plane gravitational waves [PDF]

open access: yes, 2001
The Mathisson-Papapetrou-Dixon equations for a massive spinning test particle in plane gravitational waves are analysed and explicit solutions constructed in terms of solutions of certain linear ordinary differential equations.
Benn I M   +19 more
core   +2 more sources

Solution of Fractional Kinetic Equations Associated with the p,q-Mathieu-Type Series

open access: yesDiscrete Dynamics in Nature and Society, 2020
In this paper, our aim is to finding the solutions of the fractional kinetic equation related with the p,q-Mathieu-type series through the procedure of Sumudu and Laplace transforms.
D. L. Suthar   +2 more
doaj   +1 more source

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