Results 101 to 110 of about 19,320 (310)

Investigating Stress During a Virtual Reality Game Through Fractal and Multifractal Analysis of Heart Rate Variability

Applied System Innovation
This article presents the process of creating a virtual reality (VR) game designed to assess the impact of stress on heart rate variability (HRV). The game features dynamic and challenging scenarios to induce stress responses, incorporating advanced 3D ...
Penio Lebamovski, Evgeniya Gospodinova
doaj   +1 more source

Detrended fluctuation analysis of traffic data

, 2008
Different routing strategies may result in different behaviors of traffic on internet. We analyze the correlation of traffic data for three typical routing strategies by the detrended fluctuation analysis (DFA) and find that the degree of correlation of the data can be divided into three regions, i.e., weak, medium, and strong correlation.
Zhu, Xiaoyan, Liu, Zonghua, Tang, Ming
openaire   +2 more sources

Using a social‐ecological macrosystems framework to understand how human activities alter ecological synchrony

People and Nature, EarlyView.
Abstract Different aspects of ecological systems, biotic or abiotic, often fluctuate in coordinated patterns over space and time. Such high concordance between ecological processes is often referred to as ecological synchrony. Human activities, including and beyond climate change, have the potential to alter ecological synchrony by disrupting or ...
Yiluan Song, Mallory Barnes, K. Ann Bybee‐Finley, Kyla M. Dahlin, Travis McDevitt‐Galles, Stephan B. Munch, Guillermo E. Ponce‐Campos, Casey Youngflesh, Benjamin Zuckerberg, Kai Zhu   +9 more
wiley   +1 more source

Using a causal effect network approach to quantify the impact of ENSO teleconnections on summer monsoon precipitation over the Himalayas and key regional circulations

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We quantified the causal effect (CE) of linkages between four monthly climate indices ENSO, SMHP, RWC, and MHC for 1940–2022 with a time lag of one month. The results show CE values from (1) ENSO to SMHP of −0.33$$ -0.33 $$ to −0.44$$ -0.44 $$ (i.e., a one standard deviation (SD) increase in ENSO causes a decrease in SMHP of −0.33$$ -0.33 $$ to −0.44$$
Grzegorz Muszynski, Andrew Orr, Indrani Roy, Giorgia Di Capua, Hamish D. Pritchard, J. Scott Hosking   +5 more
wiley   +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

Multifractal Fluctuations in Seismic Interspike Series

, 2005
Multifractal fluctuations in the time dynamics of seismicity data have been analyzed. We investigated the interspike intervals (times between successive earthquakes) of one of the most seismically active areas of central Italy by using the Multifractal ...
Allan, Arneodo, Ashkenazy, Ashkenazy, Bacry, Bak, Barabasi, Buldyrev, Buldyrev, Bunde, Davis, Dietrich, Feder, Godano, Goltz, Gutenberg, Hu, Ivanov, Ivanov, Kagan, Kantelhardt, Kantelhardt, Liu, Lowen, Luciano Telesca, Malamud, Maria Macchiato, Muzy, Muzy, Ossadnik, Peng, Peng, Sachs, Saucier, Stanley, Stanley, Telesca, Telesca, Telesca, Telesca, Telesca, Telesca, Telesca, Telesca, Telesca, Telesca, Telesca, Telesca, Turcott, Turcotte, Utsu, Vandewalle, Vincenzo Lapenna   +52 more
core   +1 more source

The relationship between seasonal mean temperature and most extreme day

Quarterly Journal of the Royal Meteorological Society, EarlyView.
In Northern Hemisphere winter, there is a strong correlation between seasonal mean temperature and coldest daily mean temperature which varies in magnitude from one region to another (with a weaker relationship in summer between mean and hottest day).
Anna Maidens, Hazel E. Thornton, Philip Bett‐Williams, Doug Smith   +3 more
wiley   +1 more source

Modulation of North Atlantic atmospheric rivers by the Gulf Stream

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Gulf Stream ocean variability plays a key role in modulating atmospheric river (AR) activity over the North Atlantic during winter and spring at monthly time‐scales. Increased ocean heat transport and mesoscale activity in the Gulf Stream are linked to northward shifts in ARs, while stronger surface heat fluxes drive ARs southward.
Ferran Lopez‐Marti, Arnaud Czaja, Gabriele Messori, Anna Rutgersson   +3 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

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