Scale Invariance and Nonlinear Patterns of Human Activity
نویسندگان
چکیده
Kun Hu, Plamen Ch. Ivanov, Zhi Chen, Michael F. Hilton, H. Eugene Stanley, Steven A. Shea Center for Polymer Studies and Department of Physics, Boston University, Boston, MA 02215 Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, MA 02115 Harvard Medical School and Division of Sleep Medicine, Brigham & Women’s Hospital,Boston, MA 02115 (Received March 17, 2003; Revised August 01, 2003)
منابع مشابه
Effect of nonlinear pedagogy on the performance of the short backhand serve of badminton
Motor learning or the acquisition of coordination is a process of searching for stable functional coordination patterns, into which a system can settle during a task or activity. Human as complex creatures can choose the best pattern based on conditions within different coordination patterns and also achieve goals of tasks. So the purpose of this study is to determination the effect of a Nonlin...
متن کاملMultifractality and scale invariance in human heartbeat dynamics.
Human heart rate is known to display complex fluctuations. Evidence of multifractality in heart rate fluctuations in healthy state has been reported [Ivanov, Nature (London) 399, 461 (1999)]. This multifractal character could be manifested as the dependence of the probability density functions (PDFs) of the interbeat interval increments, which are the differences in two interbeat intervals that...
متن کاملDecrease in scale invariance of activity fluctuations with aging and in patients with suprasellar tumors
Motor activity in healthy young humans displays intrinsic fluctuations that are scale-invariant over a wide range of time scales (from minutes to hours). Human postmortem and animal lesion studies showed that the intact function of the suprachiasmatic nucleus (SCN) is required to maintain such scale-invariant patterns. We therefore hypothesized that scale invariance is degraded in patients trea...
متن کاملNon-random fluctuations and multi-scale dynamics regulation of human activity.
We investigate if known extrinsic and intrinsic factors fully account for the complex features observed in recordings of human activity as measured from forearm motion in subjects undergoing their regular daily routine. We demonstrate that the apparently random forearm motion possesses dynamic patterns characterized by robust scale-invariant and nonlinear features. These patterns remain stable ...
متن کاملReduction of scale invariance of activity fluctuations with aging and Alzheimer's disease: Involvement of the circadian pacemaker.
Human motor control systems orchestrate complex scale-invariant patterns of activity over a wide range of time scales (minutes to hours). The neural mechanisms underlying scale-invariance are unknown in humans. In rats, the master circadian pacemaker [suprachiasmatic nucleus (SCN)] is crucially involved in scale-invariant activity fluctuations over multiple time scales from minutes to 24 h. Agi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2003