Results 91 to 100 of about 1,351,782 (335)

Type-K Exponential Ordering with Application to Delayed Hopfield-Type Neural Networks

Journal of Applied Mathematics, 2012
Order-preserving and convergent results of delay functional differential equations without quasimonotone condition are established under type-K exponential ordering.
Bin-Guo Wang
doaj   +1 more source

Dynamical system approach of non-minimal coupling in holographic cosmology

Nuclear Physics B, 2019
We study the dynamical system approach of non-minimally coupled scalar field to induced gravity on the brane in the framework of holographic cosmology. In this context, we derive the modified Friedmann equation and the equation of motion. The dynamics of
Aatifa Bargach, Farida Bargach, Taoufik Ouali   +2 more
doaj   +1 more source

Incidence of nonextensive thermodynamics in temporal scaling at Feigenbaum points

, 2006
Recently, in Phys. Rev. Lett. 95, 140601 (2005), P. Grassberger addresses the interesting issue of the applicability of q-statistics to the renowned Feigenbaum attractor.
A. Robledo, Anania, Añaños, Baldovin, Baldovin, Baldovin, Baldovin, Beck, Borges, Buiatti, Casati, Coraddu, Coraddu, Costa, de Moura, Eckmann, Farmer, Fujisaka, Grassberger, Grassberger, Halsey, Hata, Hilborn, Horita, Latora, Latora, Lyra, Mayoral, Mayoral, Montangero, Mori, Paladin, Robledo, Robledo, Robledo, Robledo, Sano, Schuster, Tirnakli, Tonelli, Tsallis, Tsallis, Yang   +42 more
core   +1 more source

Unique Performance Considerations for Printable Organic Semiconductor and Perovskite Radiation Detectors: Toward Consensus on Best Practice Evaluation

Advanced Functional Materials, EarlyView.
A lack of standard approaches for testing and reporting the performance of metal halide perovskites and organic semiconductor radiation detectors has resulted in inconsistent interpretation of performance parameters, impeding progress in the field. This Perspective recommends key metrics and experimental details, which are suggested for reporting in ...
Jessie A. Posar, Matthew Large, Andrea Ciavatti, Laura Basiricò, Beatrice Fraboni, Paul J. Sellin, Attila J. Mozer, Marco Petasecca, Matthew J. Griffith   +8 more
wiley   +1 more source

Is a hyperchaotic attractor superposition of two multifractals?

, 2017
In the context of chaotic dynamical systems with exponential divergence of nearby trajectories in phase space, hyperchaos is defined as a state where there is divergence or stretching in at least two directions during the evolution of the system.
Ambika, G., Harikrishnan, K. P., Misra, R.   +2 more
core   +1 more source

Exponential attractors of the nonlinear wave equations

Chinese Science Bulletin, 1998
This paper is devoted to the exponential attractors of nonlinear wave equations of the form: \[ \begin{cases} u_{tt}+ \alpha u_t-\Delta u+g(u)= f(x), (x,t) \in\Omega \times\mathbb{R}_+,\\ u|_{\partial \Omega}=0,\;u(x,0)=u_0(x),\;u_t(x,0)= u_1(x).\end{cases} \] The authors prove \(H^1_0(\Omega)\times L^2 (\Omega)\)-type exponential attractors using both
Dai, Zhengde, Ma, Dacai
openaire   +2 more sources

Influence of Layering and Curie Temperature Uncertainty on the Performance of Multilayer Active Magnetic Regenerators

Advanced Functional Materials, EarlyView.
This study examines how manufacturing uncertainties in Curie temperatures (1.5–2°C) affect multilayer active magnetic regenerators (AMR). While increasing the number of magnetocaloric layers boosts cooling power, performance degrades due to temperature variations.
Urban Tomc, Guilherme F. Peixer, Christian R. H. Bahl, Kaspar K. Nielsen, Jaime A. Lozano, Jader R. Barbosa, A. Kitanovski   +6 more
wiley   +1 more source

Quasi-stability and continuity of attractors for nonlinear system of wave equations

Nonautonomous Dynamical Systems, 2021
In this paper, we study the long-time behavior of a nonlinear coupled system of wave equations with damping terms and subjected to small perturbations of autonomous external forces.
Freitas M. M., Dos Santos M. J., Ramos A. J. A., Vinhote M. S., Santos M. L.   +4 more
doaj   +1 more source

Pre - Inflationary Clues from String Theory ?

, 2014
"Brane supersymmetry breaking" occurs in String Theory when the only available combinations of D-branes and orientifolds are not mutually BPS and yet do not introduce tree-level tachyon instabilities.
A. Gruppuso, A. Gruppuso ., A. Kamenev, A. Sagnotti, A. Sagnotti, A. Sagnotti, A. Sen, A.A. Andrianov, A.Y. Kamenshchik, B. Zwiebach, C. Condeescu, C.V. Johnson, D.H. Lyth, D.S. Gorbunov, D.Z. Freedman, E. Bergshoeff, E. Dudas, E. Dudas, E. Kiritsis, E.A. Bergshoeff, E.A. Bergshoeff, F.G. Pedro, G. Aldazabal, G.F. Giudice, G.F. Giudice, I.P.C. Heard, J. Ellis, J. Martin, J. Polchinski, J. Wess, J.M. Maldacena, K. Becker, M. Cicoli, M. Shifman, M.B. Green, N. Kitazawa, P. Fré, P. Fré, P.K. Townsend, Planck collaboration, Planck collaboration, Planck collaboration, Planck collaboration, R. Barbieri, R. Bousso, R. Emparan, R. Kallosh, R. Kallosh, R.K. Jain, S. Ferrara, S. Ferrara, S. Ferrara, S. Weinberg, S.V. Ketov, V. Mukhanov, V.F. Mukhanov, V.F. Mukhanov, WMAP collaboration, WMAP collaboration, Y. Golfand, Y. Golfand, Z.-G. Liu   +61 more
core   +1 more source

Scaling solutions in general non-minimal coupling theories [PDF]

, 1999
A class of generalized non-minimal coupling theories is investigated, in search of scaling attractors able to provide an accelerated expansion at the present time.
A. R. Liddle, B. Ratra, C. Wetterich, C. Wetterich, D. B. Guenther, E. J. Copeland, F. S. Accetta, H. J. Schmidt, I. Zlatev, J. D. Barrow, J. Frieman, K. Coble, K. I. Maeda, L. Amendola, L. Amendola, L. Amendola, Luca Amendola, M. S. Turner, P. G. Ferreira, P. J. Steinhardt, P. Viana, R. R. Caldwell, S. Perlmutter, T. Futamase, U. Kasper   +24 more
core   +2 more sources