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28 March 2024
 
  » arxiv » cond-mat/0210028

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Power-law temporal auto-correlations in day-long records of human physical activity and their alteration with disease
Luis A. Nunes Amaral ; Danyel J. Bezerra Soares ; Luciano R. da Silva ; Liacir S. Lucena ; Mariko Saito ; Hiroaki Kumano ; Naoko Aoyagi ; Yoshiharu Yamamoto ;
Date 1 Oct 2002
Subject cond-mat q-bio
AffiliationNorthwestern University), Danyel J. Bezerra Soares, Luciano R. da Silva, Liacir S. Lucena (Universidade Federal do Rio Grande do Norte), Mariko Saito, Hiroaki Kumano (University of Tokyo Hospital), Naoko Aoyagi, and Yoshiharu Yamamoto (University of To
AbstractWe investigate long-duration time series of human physical activity under three different conditions: healthy individuals in (i) a constant routine protocol and (ii) in regular daily routine, and (iii) individuals diagnosed with multiple chemical sensitivities. We find that in all cases human physical activity displays power law decaying temporal auto-correlations. Moreover, we find that under regular daily routine, time correlations of physical activity are significantly different during diurnal and nocturnal periods but that no difference exists under constant routine conditions. Finally, we find significantly different auto-correlations for diurnal records of patients with multiple chemical sensitivities.
Source arXiv, cond-mat/0210028
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