Results 21 to 30 of about 102,836 (266)

Analysis of Dynamic Characteristics of Tristable Exponential Section of Piezoelectric Energy Harvester

open access: yesEnergies, 2023
Variable-cross-section beams have better mass and strength distribution compared with constant cross-section beams, which can optimize the harvesting power of piezoelectric vibration energy harvesters, which are widely used in self-supplied and low-power
Zhaoxin Cai   +3 more
doaj   +1 more source

Self-restricting Noise and Exponential Relative Entropy Decay Under Unital Quantum Markov Semigroups [PDF]

open access: yesQuantum
States of open quantum systems often decay continuously under environmental interactions. Quantum Markov semigroups model such processes in dissipative environments.
Nicholas LaRacuente
doaj   +1 more source

Exponential Estimates and Stabilization of Discrete-Time Singular Time-Delay Systems Subject to Actuator Saturation

open access: yesDiscrete Dynamics in Nature and Society, 2012
This paper is concerned with exponential estimates and stabilization of a class of discrete-time singular systems with time-varying state delays and saturating actuators.
Jinxing Lin
doaj   +1 more source

The practical electromagnetic effect in surface-enhanced Raman scattering observed by the lithographically fabricated gold nanosquare dimers

open access: yesAIP Advances, 2020
We experimentally investigated the practical electromagnetic effects in surface-enhanced Raman scattering (SERS), using the precisely fabricated array of gold nanosquare dimers. The array of gold nanosquare dimers was fabricated by electron-beam exposure
Satoshi Kaneko   +4 more
doaj   +1 more source

Energy Decay Estimates of a Timoshenko System with Two Nonlinear Variable Exponent Damping Terms

open access: yesMathematics, 2023
This paper is concerned with the asymptotic behavior of the solution of a Timoshenko system with two nonlinear variable exponent damping terms. We prove that the system is stable under some specific conditions on the variable exponent and the equal wave ...
Adel M. Al-Mahdi   +1 more
doaj   +1 more source

Exponential Decay for Nonlinear von Kármán Equations with Memory

open access: yesAbstract and Applied Analysis, 2013
We consider the nonlinear von Kármán equations with memory term. We show the exponential decay result of solutions. Our result is established without imposing the usual relation between g and its derivative.
Jum-Ran Kang
doaj   +1 more source

Is radioactive decay really exponential? [PDF]

open access: yesEPL (Europhysics Letters), 2012
Radioactive decay of an unstable isotope is widely believed to be exponential. This view is supported by experiments on rapidly decaying isotopes but is more difficult to verify for slowly decaying isotopes. The decay of 14C can be calibrated over a period of 12,550 years by comparing radiocarbon dates with dates obtained from dendrochronology.
openaire   +4 more sources

Exponential decay of expansive constants [PDF]

open access: yesScience China Mathematics, 2013
A map $f$ on a compact metric space is expansive if and only if $f^n$ is expansive. We study the exponential rate of decay of the expansive constant of $f^n$. A major result is that this rate times box dimension bounds topological entropy.
openaire   +3 more sources

Hands‐on protocol for preparing water‐soluble fractions from agri‐food samples for NMR‐based metabolomics analysis

open access: yesFEBS Open Bio, EarlyView.
This research protocol outlines a workflow for nuclear magnetic resonance (NMR)‐based metabolomics in the agri‐food sector. Using two case studies—strawberry leaves (solid matrix) and wine (liquid matrix)—it details the procedures for sample preparation, data acquisition, and processing.
Andrea Fernández‐Veloso   +4 more
wiley   +1 more source

Antibiofilm activity of a chionodracine‐derived peptide by NMR‐based metabolomics of cell‐free supernatant of Acinetobacter baumannii clinical strains

open access: yesFEBS Open Bio, EarlyView.
KHS‐Cnd peptide is able to impair biofilm formation and disaggregate mature biofilms in Acinetobacter baumannii clinical isolates. Differences in extracellular metabolites reflect changes in biofilm metabolism due to KHS‐Cnd treatment. Among the differentially represented extracellular metabolites upon KHS‐Cnd treatment, the significantly altered ...
Fernando Porcelli   +9 more
wiley   +1 more source

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