Results 21 to 30 of about 17,600,790 (296)

The Semiotics of the ode Al-samedoun" by Abdul Quddus al-Ameli in the light of Michael Riffaterre’s semiotic approach [PDF]

open access: yesنقد ادب معاصر عربی, 2021
Poetry of Resistance is considered to be a meaning-based poetry with its referential function being superior to its poetic and literary functions due to its external references.
Narges Ansari
doaj   +1 more source

Analysis of Preterm Pregnancies using Empirical Mode Decomposition based Fractal Features

open access: yesCurrent Directions in Biomedical Engineering, 2021
Preterm birth (gestational age < 37 weeks) is a serious pregnancy related complication that could lead to fetal morbidity and mortality. Monitoring the activity of uterus is considered to be crucial for the early diagnosis of preterm birth.
Padmanabhan Vardhini   +2 more
doaj   +1 more source

Single-Layer Phase Screen With Pointing Errors for Free Space Optical Communication

open access: yesIEEE Access, 2021
Single-layer phase screen is a classical, simple and accurate approach for simulating the optical field under turbulence, and it is generally used in free space optical communication (FSOC).
Xin Liu   +4 more
doaj   +1 more source

Stochastic resonance of fractional-order Langevin equation driven by periodic modulated noise with mass fluctuation

open access: yesAdvances in Difference Equations, 2020
The stochastic resonance (SR) of a second-order harmonic oscillator subject to mass fluctuation and periodic modulated noise in viscous media is studied.
Shan Yang, Mou Deng, Ruibin Ren
doaj   +1 more source

Collective Behaviors of Star-Coupled Harmonic Oscillators with Fluctuating Frequency in the Presence of Stochastic Resonance

open access: yesFractal and Fractional, 2022
The stochastic resonance (SR) of a star-coupled harmonic oscillator subject to multiplicative fluctuation and periodic force in viscous media is studied.
Ruibin Ren, George X. Yuan
doaj   +1 more source

Superfluid density, Josephson relation and pairing fluctuations in a multi-component fermion superfluid

open access: yesScientific Reports, 2021
In this work, a Josephson relation is generalized to a multi-component fermion superfluid. Superfluid density is expressed through a two-particle Green function for pairing states.
Yi-Cai Zhang
doaj   +1 more source

Jarzynski Equality for Driven Quantum Field Theories

open access: yesPhysical Review X, 2018
The fluctuation theorems, and in particular, the Jarzynski equality, are the most important pillars of modern nonequilibrium statistical mechanics.
Anthony Bartolotta, Sebastian Deffner
doaj   +1 more source

Numerical Investigation of Periodic Fluctuations in Energy Efficiency in Centrifugal Pumps at Different Working Points

open access: yesEnergies, 2017
In order to simulate the energy efficiency fluctuation behavior of an industrial centrifugal pump with a six-blade impeller, a full-scale three-dimensional (3D) an unsteady state computational fluid dynamics (CFD) model was used.
Hehui Zhang, Shengxiang Deng, Yingjie Qu
doaj   +1 more source

Quantum work statistics close to equilibrium

open access: yesPhysical Review Research, 2020
We study the statistics of work, dissipation, and entropy production of a quantum quasi-isothermal process, where the system remains close to thermal equilibrium along the transformation.
Matteo Scandi   +3 more
doaj   +1 more source

A study on the possible usefulness of detrended fluctuation analysis of the electroencephalogram background activity in Alzheimer's disease [PDF]

open access: yes, 2008
We studied the EEG background activity of Alzheimer's disease (AD) patients with detrended fluctuation analysis (DFA). DFA provides an estimation of the scaling information and long-range correlations in time series. We recorded the EEG in 11 AD patients
Abasolo, Daniel   +3 more
core   +1 more source

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