Results 21 to 30 of about 10,238,385 (298)

Explicit criteria for the oscillation of second-order differential equations with several sub-linear neutral coefficients

Advances in Difference Equations, 2020
In this work, we present sufficient conditions for oscillation of all solutions of a second-order functional differential equation. We consider two special cases when γ > β $\gamma >\beta $ and γ < β $\gamma
Shyam Sundar Santra, Tanusri Ghosh, Omar Bazighifan   +2 more
doaj   +1 more source

Deformation characteristics of droplet generated by Rayleigh jet breakup

AIP Advances, 2021
This article investigated the effects of driving and jet parameters on the deformation characteristics of the droplet generated by a Rayleigh jet breakup for the first time. The deformation characteristics of the droplet include its oscillation amplitude
Liang Hu, Lei She, Yanshen Fang, Rui Su, Xin Fu   +4 more
doaj   +1 more source

Temporal variations in English Populations of a forest insect pest, the green spruce aphid (Elatobium abietinum), associated with the North Atlantic Oscillation and global warming [PDF]

, 2007
Based on an exceptionally long modern ecological dataset (41 years), it has been possible to show that warm weather in England associated with a positive North Atlantic Oscillation (NAO) index causes the spring migration of the green spruce aphid ...
Harrington, R., Leroy, S. A. G., Suzanne A.G. Leroy, Westgarth-Smith, Angus R., Harrington, Richard, Collins, Philip E.F., Westgarth-Smith, AR, Leroy, S.A.G., Richard Harrington, Angus R. Westgarth-Smith, Collins, P.E.F., Westgarth-Smith, A. R., Philip E.F. Collins, Leroy, Suzanne A.G., Leroy, SAG, Collins, PEF, Harrington, R, Westgarth-Smith, Angus, Collins, P. E. F.   +18 more
core   +1 more source

Oscillation of a second order half-linear difference equation and the discrete Hardy inequality

Electronic Journal of Qualitative Theory of Differential Equations, 2017
In local terms on finite and infinite intervals we obtain necessary and sufficient conditions for the conjugacy and disconjugacy of the following second order half-linear difference equation \begin{equation*} \Delta(\rho_i|\Delta y_i|^{p-2}\Delta y_i ...
Aigerim Kalybay, Danagul Karatayeva, Ryskul. Oinarov, Ainur Temirkhanova   +3 more
doaj   +1 more source

Optical Parametric Oscillation with Ultra-Low Power Threshold in a Dimer of Active-Passive Cavities

Crystals, 2021
Optical parametric oscillation can convert the input laser into a couple of coherent optical output with signal and idler frequencies. It is an important method for the realization of the broadband middle infrared tunable lasers.
Bo Lu, Chen-Rui Fan, Jun-Yang Song, Chuan Wang   +3 more
doaj   +1 more source

Linking the flow-induced tremor model to the seismological observation: application to the deep harmonic tremor at Hakone volcano, Japan

Earth, Planets and Space, 2023
Decades ago, Julian (J Volcanol Geotherm Res 101:19–26, 1994. https://doi.org/10.1029/93JB03129 ) proposed the lumped parameter model of non-linear excitation of an elastic channel vibration by fluid flow as a mechanism of volcanic harmonic tremor. Since
Tomonori Ozaki, Yohei Yukutake, Mie Ichihara   +2 more
doaj   +1 more source

Condensation oscillation characteristic of steam with non-condensable gas through multi-hole sparger at low mass flux

Nuclear Engineering and Technology, 2023
To study oscillation characteristic of steam and non-condensable gas direct contact condensation through multi-hole sparger at low mass flux, a series of experiments of pure steam and mixture gas condensation have been carried out under the conditions of
Dandi Zhang, Lili Tong, Xuewu Cao
doaj   +1 more source

Comparison theorems for oscillation and non-oscillation of perturbed Euler type equations [PDF]

Opuscula Mathematica
The aim of this paper is to present two comparison theorems. These results enable to describe the oscillation behavior of second order Euler type half-linear differential equations with perturbations in both terms using previously obtained oscillation ...
Petr Hasil, Jiřina Šišoláková, Michal Veselý   +2 more
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Theoretical investigation on resonance characteristics of a vapor bubble based on Laplace transform method

Ultrasonics Sonochemistry, 2023
In the present paper, resonance characteristics of the vapor bubble oscillating in an acoustic field are investigated analytically. The analytical solution of the non-dimensional perturbation of the instantaneous bubble radius during the transient ...
Xiaoyu Wang, Xuan Du, Dan Gao, Yuning Zhang, Ting Chen, Yuning Zhang   +5 more
doaj   +1 more source

Oscillation conditions for difference equations with several variable delays [PDF]

Opuscula Mathematica, 2023
A technique is developed to establish a new oscillation criterion for a first-order linear difference equation with several delays and non-negative coefficients.
Bassant M. El-Matary, Hassan A. El-Morshedy, Vasileios Benekas, Ioannis P. Stavroulakis   +3 more
doaj   +1 more source