Results 41 to 50 of about 12,289 (264)

Optimal polynomial decay of functions and operator semigroups [PDF]

Mathematische Annalen, 2009
We characterize the polynomial decay of orbits of Hilbert space $C_0$-semigroups in resolvent terms. We also show that results of the same type for general Banach space semigroups and functions obtained recently in the paper by C.J.K.Batty and T.Duyckaerts, Non-uniform stability for bounded semi-groups on Banach spaces (J. Evol. Eq.
Borichev, Alexander, Tomilov, Yuri
openaire   +4 more sources

Resistance to Overdoping Allows Over 2000 S cm−1 Conductivity in P(g3BTTT) With Anion‐Exchange Doping

Advanced Materials, EarlyView.
Anion‐exchange doping of conjugated polymers is an effective way to achieve high conductivities. Here, we report over 2000 S cm−1 electrical conductivity for doped P(g3BTTT). In addition, we show that P(g3BTTT) sustains exceptionally high doping levels without any drop in the charge mobility.
Basil Hunger, Maximilian M. Horn, Eva Röck, Diego Rosas Villalva, Lize Bynens, Jochen Vanderspikken, Christina Kousseff, Silène Gobeil, Olivier Bardagot, Nesibe Akmanşen‐Kalayci, Sarah H. Tolbert, Iain McCulloch, Wouter Maes, Demetra Tsokkou, Natalie Banerji   +14 more
wiley   +1 more source

Decadimento uniforme per equazioni integro-differenziali lineari di Volterra

Bruno Pini Mathematical Analysis Seminar, 2011
This talk is devoted to some recent results concerning the exponential and the polynomial decays of the energy associated with a linear Volterra integro-differential equation of hyperbolic type in a Hilbert space, which is an abstract version of the ...
Stefania Gatti
doaj  

Decay estimates for oscillatory integrals with polynomial phase

Journal of Mathematical Analysis and Applications, 2003
The paper deals with oscillatory integrals \(\int^b_a e^{i\lambda \varphi(t)}dt\) with phase \(p(t)\) being a real monic polynomial of degree \(n\) and big positive parameter \(\lambda\). It is supposed that for some \(j\), \(1\leq j\leq n-1\), the \(j\)-th derivative \(p^{(j)}(t)\) of \(p(t)\) has real and simple roots only.
openaire   +1 more source

Switchable Magnonic Crystals Based on Spin Crossover/CrSBr Heterostructures

Advanced Materials, EarlyView.
Multiscale modeling is employed to investigate the functionality of a light‐controlled, tunable magnonic crystal based on spin‐crossover Fe‐pz molecules integrated with a monolayer of CrSBr. Ab initio simulations confirm that the molecules remain functional on the CrSBr surface, while a semiclassical elastic model demonstrates that light‐induced ...
Andrei Shumilin, Sourav Dey, Denisa Coltuneac, Laurentiu Stoleriu, José J. Baldoví   +4 more
wiley   +1 more source

Strong stability results for a Timoshenko system with thermoelasticity and two fractional damping terms

Boundary Value Problems
This paper investigates a Timoshenko system with two fractional damping terms acting on the transverse displacement and rotation angle equations, coupled with a thermoelastic effect governed by the Coleman–Gurtin law for heat flux.
Ali Krelifa, Imene Laribi, Djamel Ouchenane, Salah Boulaaras, Mohammad Shahrouzi   +4 more
doaj   +1 more source

Polynomial decay to equilibrium for the Becker-Döring equations

, 2015
This paper studies rates of decay to equilibrium for the Becker-Döring equations with subcritical initial data. In particular, polynomial rates of decay are established when initial perturbations of equilibrium have polynomial moments. This is proved by using new dissipation estimates in polynomially weighted $\ell^1$ spaces, operator decomposition ...
Murray, Ryan W., Pego, Robert L.
openaire   +2 more sources

Space‐Time Coding Conformal Metasurfaces for Multifrequency Beam Steering and Shaping

Advanced Materials, EarlyView.
Space‐time coding conformal metasurfaces enable dynamic wave control on curved surfaces by combining programmable spatial patterns with temporal modulation. This study shows that a single conformal aperture can independently manipulate multiple frequency components, achieving multifunctional beam shaping and steering, with implications for ...
Filippo Pepe, Lei Zhang, Yi Ning Zheng, Xiao Qing Chen, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Tie Jun Cui, Vincenzo Galdi   +8 more
wiley   +1 more source

Hard‐Magnetic Soft Millirobots in Underactuated Systems

Advanced Robotics Research, EarlyView.
This review provides a comprehensive overview of hard‐magnetic soft millirobots in underactuated systems. It examines key advances in structural design, physics‐informed modeling, and control strategies, while highlighting the interplay among these domains.
Qiong Wang, Zixuan Zhang, Bingyan Li, Junkai Wang, Hongcheng Gu   +4 more
wiley   +1 more source

Polynomial Fourier decay for fractal measures and their pushforwards

Mathematische Annalen
Abstract We prove that the pushforwards of a very general class of fractal measures $$\mu $$ μ on $$\mathbb {R}^d$$ R
Simon Baker, Amlan Banaji
openaire   +4 more sources