Power law temporal auto-correlations in day-long records of human physical activity and their alteration with disease

Autor:	Hiroaki Kumano, Yoshiharu Yamamoto, Liacir S. Lucena, L. R. da Silva, Mariko Saito, Naoko Aoyagi, D. J. Bezerra Soares, L. A. Nunes Amaral
Rok vydání:	2004
Předmět:	business.industry Regular daily routine Healthy individuals Statistics Physical activity General Physics and Astronomy Medicine Nocturnal Constant (mathematics) business Power law Quantitative biology
Zdroj:	Europhysics Letters (EPL). 66:448-454
ISSN:	1286-4854 0295-5075
DOI:	10.1209/epl/i2003-10227-7
Popis:	We 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f2aa93a69ded74ebb956e35011936b32 https://doi.org/10.1209/epl/i2003-10227-7 Zobrazit plný text záznamu