Results 81 to 90 of about 5,052 (252)

Nonlinear analysis of electroencephalogram signals while listening to the holy Quran

Journal of Medical Signals and Sensors, 2019
Background: Electrical activity of the brain, resulting from electrochemical signaling between neurons, is recorded by electroencephalogram (EEG). The neural network has complex behavior at different levels that strongly confirms the nonlinear nature of ...
Mahsa Vaghefi, Ali Motie Nasrabadi, Seyed Mohammad Reza Hashemi Golpayegani, Mohammad Reza Mohammadi, Shahriar Gharibzadeh   +4 more
doaj   +1 more source

Diagnosing the 11‐year solar cycle's influence on the East Atlantic pattern

Quarterly Journal of the Royal Meteorological Society, EarlyView.
A previously unidentified solar‐cycle response in the East Atlantic pattern is found in late winter at lag +3 years with larger amplitude than the NAO response. A statistically significant NAO response to the solar cycle is seen in late winter at lag 0 years.
Stergios Misios, Paula L. M. Gonzalez, Lesley J. Gray, Scott Osprey, Hedi Ma   +4 more
wiley   +1 more source

Detrended Fluctuation Analysis Complements Spectral Features in Characterizing Functional Brain Aging

Fractal and Fractional
Aging is a significant risk factor for several neurodegenerative diseases. Understanding brain aging processes is a fundamental step in identifying the early signs of pathological dysfunction.
Simone Cauzzo, Sadaf Moaveninejad, Angelo Antonini, Maurizio Corbetta, Camillo Porcaro   +4 more
doaj   +1 more source

Spring onset forecast using harmonic analysis on daily mean temperature in Germany

Environmental Research Letters, 2020
The onset of spring is crucial for planning agricultural practices and has influences on animal activities as well. It is no doubt beneficial to properly forecast spring onset in advance.
Qimin Deng, Philipp G Meyer, Zuntao Fu, Holger Kantz   +3 more
doaj   +1 more source

Evaluating anisotropy‐based Monin–Obukhov similarity theory over canopies and complex terrain

Quarterly Journal of the Royal Meteorological Society, EarlyView.
This study shows that an anisotropy‐based generalization of Monin–Obukhov surface‐layer scaling (SC23) applies readily across a wide range of atmospheric conditions with variable terrain, canopies, and land‐cover complexity. This work focuses on the scaling of velocity variances for 7 years at the 47 sites in the National Ecological Observation Network
Tyler S. Waterman, Ivana Stiperski, Nathaniel Chaney, Marc Calaf   +3 more
wiley   +1 more source

Impact of data assimilation on Arctic sea‐ice thickness variability and its coupling with atmospheric forcing

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We document for the first time how the assimilation of CS2SMOS observations improves the model representation of Arctic sea‐ice thickness (SIT) and its variability: biases are reduced (top row), while excessive variability in the Beaufort Sea and lack of variability in the ice pack are both corrected (bottom row).
Jiping Xie, Yue Ying, Richard Davy, Laurent Bertino   +3 more
wiley   +1 more source

Analysis of Indian Foreign Exchange Markets: A Multifractal Detrended Fluctuation Analysis (MFDFA) Approach

International Journal of Empirical Economics
The objectives of this paper are to analyse the presence of multifractality in daily exchange rates of the US dollar (USD), British Pound (GBP), Euro (EUR), and Japanese Yen (JPY) relative to the Indian Rupee (INR) for a specific period (1999–2018) and ...
Radhika Prosad Datta
doaj   +1 more source

Trends in thunderstorm days, lightning activity, squalls and the environmental factors in Hong Kong

Weather, EarlyView.
This study analyses trends in Hong Kong's convective weather using long‐term observer‐based and shorter‐term instrument‐based data. Annual thunderstorm days increased significantly by 1.9 days decade−1 in 1947–2024, notably in June–September, consistent with increasingly favourable warm‐season environments for thunderstorms.
Yuk Sing Lui, Kin‐chung Hui, Chun‐wing Choy, Pak‐wai Chan, Ming‐chun Lam, Kin‐yu Chan   +5 more
wiley   +1 more source

Alpha band oscillations in common synaptic input are explanatory of the complexity of isometric knee extensor muscle torque signals

Experimental Physiology
We investigated whether the strength of oscillations in common synaptic input was explanatory of knee extensor (KE) torque signal complexity during fresh and fatigued submaximal isometric contractions, in adults aged from 18 to 90 years.
Christopher R. J. Fennell, Alexis R. Mauger, James G. Hopker   +2 more
doaj   +1 more source

Edges as ecological filters: Asymmetrical orientation‐specific arthropod activity across forest boundaries

Insect Science, EarlyView.
Moderate retention forestry creates structurally sharp forest edges that act as ecological filters, shaping orientation‐specific activity of ground‐dwelling arthropods. Using drift‐fence pitfall traps, we show that activity aligned with ecotones is more frequent than activity across forest–clearcut boundaries, particularly among detritivores.
Dominik Stočes, Ondřej Košulič, Adrián Purkart, Jan Šipoš   +3 more
wiley   +1 more source