title: A new method to analyze basic rest-activity cycle.
abstract: A new method was proposed to analyze a basic rest-activity cycle (BRAC), termed BRAC-A. This method calculates a significant cycle length by chi-squared method and the starting points of a resting phase and an active one by analysis of the array consisting of the segmented time series in the same length. Using 20 3-day computer-simulated time series of standard deviation in fetal heart rate fluctuation with known periodicity of the BRAC, we demonstrated that the BRAC-A was a useful tool to reveal the characteristics of the BRAC.
authors: Department of Obstetrics and Gynecology and Medical Information & Intelligence Center, Saga Medical School Hospital, Saga, Japan. shonoh@post.saga-med.ac.jp
authors: M
authors: M
authors: Shono
authors: H
authors: H
authors: Shono
authors: M
authors: M
authors: Takasaki
authors: Y
authors: Y
authors: Ito
authors: M
authors: M
authors: Muro
authors: T
authors: T
authors: Iwasaka
authors: H
authors: H
authors: Sugimori
mesh_terms: D000204:Activity Cycles / Q000502:physiology*; D016009:Chi-Square Distribution; D006340:Heart Rate, Fetal / Q000502:physiology; D006801:Humans; D012146:Rest / Q000502:physiology*