Results 71 to 80 of about 27,202 (290)

Saddle-point dynamics of a Yang-Mills field on the exterior Schwarzschild spacetime

, 2010
We consider the Cauchy problem for a spherically symmetric SU(2) Yang-Mills field propagating outside the Schwarzschild black hole. Although solutions starting from smooth finite energy initial data remain smooth for all times, not all of them scatter ...
Andrzej Rostworowski, Anıl Zenginoğlu, Bizoń P, Bizoń P, Boutaleb-Joutei H, Christodoulou D, Chruściel P T, Dumitrascu O, Piotr Bizoń, Szpak N, Zenginoğlu A, Zenginoğlu A, Zenginoğlu A   +12 more
core   +1 more source

Investigation of Oxygen‐Free Wetting Behavior of Aluminum on Copper via Molecular Dynamics Simulations and Experiments

Advanced Engineering Materials, EarlyView.
The wettability of aluminum droplets (Al) on different copper substrates (Cu), where liquid Al spreads on solid Cu surfaces to form a liquid–solid interface, is studied numerically and experimentally. The experimental and numerical results show good agreement in the fast‐spreading regime.
Shan Lyu, Timon Steinhoff, Finn‐Lennard Janthur, Sarah Seffer, Jörg Hermsdorf, Christian Klose, Ludger Overmeyer, Hans‐Jürgen Maier, Nina Merkert   +8 more
wiley   +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

Labyrinthine pathways towards supercycle attractors in unimodal maps

, 2007
We uncover previously unknown properties of the family of periodic superstable cycles in unimodal maps characterized each by a Lyapunov exponent that diverges to minus infinity.
Moyano, L. G., Robledo, A., Silva, D.
core   +1 more source

Evaluating Energy Absorption Performance of Filled Lattice Structures

Advanced Engineering Materials, EarlyView.
Maximum stress must be considered to robustly evaluate energy absorber designs. This approach was applied to compare all types of absorbers in a single Ashby diagram and determine the utility of filling lattice voids with a second material. High‐performance fillers can improve the performance of lattices that are limited by buckling or catastrophic ...
Christian Bonney, William P. King, Iwona Jasiuk   +2 more
wiley   +1 more source

Anisotropic Power-law Inflation

, 2010
We study an inflationary scenario in supergravity model with a gauge kinetic function. We find exact anisotropic power-law inflationary solutions when both the potential function for an inflaton and the gauge kinetic function are exponential type.
A. Golovnev, B. Himmetoglu, B. Ratra, E. Komatsu ., J. Martin, J.J. Blanco-Pillado, J.M. Maldacena, Jiro Soda, K. Dimopoulos, M.-a. Watanabe, Masa-aki Watanabe, P.V. Moniz, R. Emami, S. Kanno, S. Kanno, S. Yokoyama, Sugumi Kanno, Y. Kitada   +17 more
core   +1 more source

Multifunctional Crushing and Piezoresistive Self‐Sensing in Conductive Epoxy/CNT‐Coated Polyetherimide TPMS Lattices

Advanced Engineering Materials, EarlyView.
This study reports lightweight polyetherimide triply periodic minimal surfaces lattices coated with carbon nanotube‐reinforced epoxy that combine mechanical robustness with self‐sensing. The conformal coating enhances stiffness, strength and energy absorption while enabling reliable strain monitoring.
A. Triay, J. Schneider, P. Harrison, S. Kumar   +3 more
wiley   +1 more source

Attractor Solution of Phantom Field

, 2003
In light of recent study on the dark energy models that manifest an equation of state ...
A.E. Schulz, A.G. Riess, B. Ratra, D.E. Holz, E.J. Copeland, F. Lucchin, I. Zlatev, J.G. Hao, Jian-gang Hao, K. Coble, N. Bahcall, P. de Bernardis, P.J. Steinhardt, R.R. Caldwell, R.R. Caldwell, S. Hanany, S. Perlmutter, X.Z. Li, X.Z. Li, X.Z. Li, Xin-zhou Li, Y. Kitada   +21 more
core   +1 more source

Rafting of Ni‐Based Superalloys Under Multiaxial Load as Understood by Phase‐Field Simulations and Critical Experiments

Advanced Engineering Materials, EarlyView.
Phase‐field simulations coupled with dislocation‐density‐based crystal plasticity modeling reproduce γ′ rafting behavior in single‐crystal Ni‐based superalloys under varied loading conditions. The model captures both macroscopic creep and microscopic morphology evolution, with results matching high‐temperature creep experiments.
Micheal Younan, David Bürger, Gunther Eggeler, Oleg Shchyglo, Ingo Steinbach, Muhammad Adil Ali   +5 more
wiley   +1 more source

Robust exponential attractors for singularly perturbed Hodgkin–Huxley equations

Journal of Differential Equations, 2009
A. L. Hedgkin and A. F. Huxley formulated the mathematical model describing the mechanism of the neural excitability. In this paper a singular perturbation of the associated dynamical system is considered: \[ \begin{aligned}\varepsilon u_{tt}+ (1+\varepsilon f_3(w))u_t- u_{xx}= -f_1(w)u+ f_2(w)+\varepsilon g(w,u)\quad &\text{in } Q,\\ w_t= -h_1(u)w ...
CAVATERRA C, GRASSELLI, MAURIZIO
openaire   +3 more sources