Results 81 to 90 of about 218,183 (349)

Boundedness of solutions to fourth-order differential equation with oscillatory restoring and forcing terms

Electronic Journal of Differential Equations, 2007
This paper concerns the fourth order differential equation $$ x''''+ax'''+f(x'')+g(x')+h(x)=p(t). $$ Using the Cauchy formula for the particular solution of non-homogeneous linear differential equations with constant coefficients, we prove that the
Mathew O. Omeike
doaj  

Oscillations of differential equations with non-monotone deviating arguments

Advances in Difference Equations, 2019
The oscillatory behavior of the solutions to a differential equation with several non-monotone arguments and nonnegative coefficients is studied, and some new oscillation criteria are given.
George E. Chatzarakis, Irena Jadlovská, Tongxing Li   +2 more
doaj   +1 more source

Critical Exponents and Stability at the Black Hole Threshold for a Complex Scalar Field

, 1995
This paper continues a study on Choptuik scaling in gravitational collapse of a complex scalar field at the threshold for black hole formation. We perform a linear perturbation analysis of the previously derived complex critical solution, and calculate ...
A.M. Abrahams, A.M. Abrahams, A.M. Abrahams, C. Gundlach, C. Gundlach, C. Gundlach, C.R. Evans, C.R. Evans, C.R. Evans, D. Garfinkle, D. Garfinkle, D. Garfinkle, D.M. Eardley, Douglas M. Eardley, E.W. Hirschmann, E.W. Hirschmann, E.W. Hirschmann, Eric W. Hirschmann, M.W. Choptuik, M.W. Choptuik, M.W. Choptuik, T. Koike, T. Koike, T. Koike, W.H. Press, W.H. Press, W.H. Press   +26 more
core   +1 more source

Understanding and Optimizing Li Substitution in P2‐Type Sodium Layered Oxides for Sodium‐Ion Batteries

Advanced Functional Materials, EarlyView.
This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous 
Mingfeng Xu, Giovanni Gammaitoni, Michael Häfner, Eduardo Villalobos‐Portillo, Carlo Marini, Matteo Bianchini   +5 more
wiley   +1 more source

Oscillation analysis of numerical solutions for nonlinear delay differential equations of population dynamics

Mathematical Modelling and Analysis, 2011
This paper is concerned with oscillations of numerical solutions for the nonlinear delay differential equation of population dynamics. The equation proposed by Mackey and Glass for a ”dynamic disease” involves respiratory disorders and its solution ...
Jianfang Gao, Minghui Song, Mingzhu Liu
doaj   +1 more source

Oscillatory and non-oscillatory solutions of dynamic equations with bounded coefficients

Electronic Journal of Differential Equations, 2018
Summary: We analyze second-order half-linear dynamic equations on time scales. We prove oscillation and non-oscillation criteria which are sharp in the sense that the considered equations remain uncovered only for one setting of their coefficients. We continue in the research of the so-called conditional oscillation.
Petr Hasil, Michal Vesely
openaire   +2 more sources

EXISTENCE OF OSCILLATORY SOLUTIONS OF FRACTIONAL DIFFERENTIAL EQUATIONS

Journal of Applied Analysis & Computation
Summary: In this paper, we use Schauder-Tychonoff theorem to obtain a new sufficient condition for the global existence of oscillatory solutions for forced fractional delay differential equations.
Zhao, Huanhuan, Liu, Youjun, Kang, Shugui   +2 more
openaire   +2 more sources

Gyrokinetics from variational averaging: existence and error bounds

, 2017
The gyrokinetic paradigm in the long wavelength regime is reviewed from the perspective of variational averaging (VA). The VA-method represents a third pillar for averaging kinetic equations with highly-oscillatory characteristics, besides classical ...
Possanner, Stefan
core   +1 more source

Printed Integrated Logic Circuits Based on Chitosan‐Gated Organic Transistors for Future Edible Systems

Advanced Functional Materials, EarlyView.
Edible electronics needs integrated logic circuits for computation and control. This work presents a potentially edible printed chitosan‐gated transistor with a design optimized for integration in circuits. Its implementation in integrated logic gates and circuits operating at low voltage (0.7 V) is demonstrated, as well as the compatibility with an ...
Giulia Coco, Valerio Francesco Annese, Valerio Galli, Ilaria Penna, Debora Russo, Marina Veronesi, Rita Scarpelli, Stefania Sabella, Mario Caironi   +8 more
wiley   +1 more source

Hopf Bifurcation in an Oscillatory-Excitatory Reaction-Diffusion Model with Spatial heterogeneity

, 2016
We focus on the qualitative analysis of a reaction-diffusion with spatial heterogeneity. The system is a generalization of the well known FitzHugh-Nagumo system in which the excitability parameter is space dependent.
Ambrosio, B.
core   +2 more sources