Results 121 to 130 of about 225,313 (340)

An investigation into in‐sample and out‐of‐sample model selection for nonstationary autoregressive models

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract The stationary autoregressive model forms an important base of time‐series analysis in today's psychology research. Diverse nonstationary extensions of this model are developed to capture different types of changing temporal dynamics. However, researchers do not always have a solid theoretical base to rely on for deciding a‐priori which of ...
Yong Zhang, Anja F. Ernst, Ginette Lafit, Ward B. Eiling, Laura F. Bringmann   +4 more
wiley   +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

Detrended Fluctuation Analysis of Systolic Blood Pressure Control Loop

, 2009
We use detrended fluctuation analysis (DFA) to study the dynamics of blood pressure oscillations and its feedback control in rats by analyzing systolic pressure time series before and after a surgical procedure that interrupts its control loop. We found,
, Afifi A K, Bernardi L, C E C Galhardo, Carretta R, da Silva Soares P P, Echeverría J C, Eke A, Galhardo C E C Penna T J P de Menezes M A Soares P P, Guyton A C, Jacob F, Krieger E M, Langewitz W, M Argollo de Menezes, Mancia G, P P S Soares, Pagani M, Pagani M, Press W, Schreihofer A M, Smyth H S, T J P Penna, Virginia L B   +22 more
core   +1 more source

Untangling nutrient co‐regulation of ombrotrophic peatland development

Boreas, EarlyView.
Multi‐method (FTIR, FT‐NIR and TGA) approaches characterizing the organic peat constituents at Holcroft Moss reveal a record of switches that reflect broadly hydroclimate variability governing the decomposition patterns. There are periods, however, where hydroclimate does not fully explain the variability observed and instead changes appear linked to ...
Richard C. Chiverrell, Daniel N. Schillereff, Fiona E. Russell, Julie Valentine, Jason R. Kirby, David M. Wilkinson, John F. Boyle   +6 more
wiley   +1 more source

Modified detrended fluctuation analysis based on empirical mode decomposition

, 2009
Detrended fluctuation analysis (DFA) is a simple but very efficient method for investigating the power-law long-term correlations of non-stationary time series, in which a detrending step is necessary to obtain the local fluctuations at different ...
Alessio, Alvarez-Ramirez, Arrault, Bashan, Carbone, Carbone, Chen, Chen, Chianca, Decoster, Du, Flandrin, Flandrin, Gao-Feng Gu, Gu, Gu, Gu, Halsey, Heneghan, Hu, Huang, Jiang, Jiang, Jiang, Jiang, Jánosi, Kantelhardt, Kantelhardt, Mandelbrot, Mantegna, Meneveau, Montanari, Norouzzadeh, Novikov, Peng, Podobnik, Podobnik, Podobnik, Schertzer, Schertzer, Simonsen, Talkner, Taqqu, Wang, Wei, Wei, Wei-Xing Zhou, Wu, Xi-Yuan Qian, Yeh, Yuan, Yuan, Zhou, Zhou   +53 more
core   +1 more source

ESG Thematic Bonds in Emerging Markets: Risk, Uncertainty, and Ambiguity

European Financial Management, EarlyView.
ABSTRACT We examine the impact of risk aversion, ambiguity, and uncertainty (geopolitical and economic) on the ESG thematic bond markets in emerging countries. We analyze ESG sovereign (both USD and local currency denominated) and corporate bond markets on the aggregate and regional levels.
Nebojsa Dimic, Vanja Piljak, Laurens Swinkels, Milos Vulanovic   +3 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

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

Long‐Term Trends in Juvenile Blue Crab Recruitment Patterns in a Wind‐Driven Estuary

Fisheries Oceanography, EarlyView.
ABSTRACT Conserving exploited marine species requires understanding population dynamics across life stages and habitats. This study analyzes juvenile blue crab (Callinectes sapidus) recruitment trends in North Carolina's Albemarle‐Pamlico Estuarine System.
Erin Voigt, Lisa Etherington, David Eggleston   +2 more
wiley   +1 more source

Application of Multifractal Measures to Tehran Price Index

, 2004
We report an empirical study of Tehran Price Index (TEPIX). To analyze our data we use various methods like as, rescaled range analysis ($R/S$), modified rescaled range analysis (Lo's method), Detrended Fluctuation Analysis (DFA) and generalized Hurst ...
Barabasi, Bouchaud, Challet, Challet, Cont, Costa, Dacorogna, Fama, Feder, Flandrin, Giardina, Grau-Carles, Ivanov, Jefferies, Lo, Lux, Mandelbrot, Mantegna, Mantegna, Openg, Peng, Peters, Skjeltorp, Teverovsky   +23 more
core   +1 more source