Results 151 to 160 of about 3,588,956 (379)

On the principle of limiting amplitude

open access: yesProceedings of the Japan Academy, Series A, Mathematical Sciences, 1967
and the Sommerfeld radiation conditions at infinity. A denotes the Laplacian in E and o* is a real number. In the case when &(#)=0 and the real valued function £(#) is once continuously differentiable and its support is compact, this principle has been proved by O. A. Ladyzenskaja [1] . Here the rate of approach to steady state is like e~, e>0 as £-^oo.
openaire   +4 more sources

The amplitudes of nonlinear oscillations

open access: yesApplied Mathematics Letters, 2005
The authors consider the nonlinear second-order differential equation \[ y''(t)+p(t)f(y(t))=0, ~t\geq t_0, \] where \(p\) is continuous and positive, and \(f\) is continuous with \[ uf(u)>0\text{ for } u\neq 0 \] and \[ \int_0^{\pm\infty}f(u)\,du=\infty.
Kulenović, M. R.S., Moussa, N.
openaire   +3 more sources

Influence of Temperature on Scratch and Wear Properties of Technical Thermoplastics: Implications for Material Selection

open access: yesAdvanced Engineering Materials, EarlyView.
The share of technical thermoplastics is expected to grow further in the e‐mobility segment. In this study, a detailed temperature‐based tribological characterization of technical thermoplastics is performed. The tribological properties are discussed in terms of the dynamic mechanical properties of polymers at different ambient temperatures. A proof of
Harsha Raghuram   +2 more
wiley   +1 more source

Amplitude death in coupled chaotic oscillators

open access: yes, 2005
Amplitude death can occur in chaotic dynamical systems with time-delay coupling, similar to the case of coupled limit cycles. The coupling leads to stabilization of fixed points of the subsystems.
A. Pikovsky   +6 more
core   +1 more source

ON THE PROPAGATION OF ION ACOUSTIC SOLITARY WAVES OF SMALL AMPLITUDE.

open access: yes, 1966
: It is shown that under certain approximations the basic system of equations governing the propagation of ion acoustic waves can be reduced to the Kortweg-deVries equation. (Author)
H. Washimi, T. Taniuti
semanticscholar   +1 more source

Femtosecond Single‐ and Double‐Pulse Fabrication of Periodic Nanostructures on Stainless Steel for Surface‐Enhanced Raman Spectroscopy

open access: yesAdvanced Engineering Materials, EarlyView.
Periodic submicron features are fabricated on 304 stainless steel using single and double femtosecond laser pulses. By adjusting polarization, fluence, and inter‐pulse delay, 1D and 2D nanostructures are formed. Enhanced hydrophobicity and dense surface‐enhanced Raman spectroscopy hotspots enable analyte detection down to 10−10 M with good ...
Balaji Baskar   +3 more
wiley   +1 more source

Face amplitude of spinfoam quantum gravity

open access: yes, 2010
The structure of the boundary Hilbert-space and the condition that amplitudes behave appropriately under compositions determine the face amplitude of a spinfoam theory. In quantum gravity the face amplitude turns out to be simpler than originally thought.
Bianchi, Eugenio   +2 more
core   +4 more sources

X‐Ray Computed Tomography Quantifies Primary Phases and Reveals Crack Morphology in High‐Cycle Fatigue of Aluminum Alloy EN AW‐2618A

open access: yesAdvanced Engineering Materials, EarlyView.
Primary phases and a fatigue crack are studied in a forged blank of an aluminum alloy using synchrotron and laboratory X‐ray computed tomography. To image the crack, the fatigue test is interrupted, and a static tensile load is applied to open the crack.
Jakob Schröder   +6 more
wiley   +1 more source

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