Accession Number : ADP003845

Title :   Complex Demodulation - A Technique for Assessing Periodic Components in Sequentially Sampled Data,

Corporate Author : WALTER REED ARMY INST OF RESEARCH WASHINGTON DC

Personal Author(s) : Sing,H. C. ; Genser,S. G. ; Babkoff,H. ; Thorne,D. R. ; Hegge,F. W.

Report Date : JUN 1984

Pagination or Media Count : 26

Abstract : Circadian and other rhythmic components in data obtained from a sleep deprivation study are detected and characterized by complex demodulation. The output of this analytical technique yields both frequency and time domain representation of each periodic component of interest. Non-stationarity introduced by an experimental treatment such as progressive sleep loss, may be observed and quantified. The analytical results provide a common basis of comparison for data as diverse as cognition responses from a performance assessment battery, moodscale scores, and physiological data such as oral temperature. The procedure operates on the entire data set and variance accounted for by each component may be calculated. (Author)

Descriptors :   *Statistical data, *Sleep deprivation, *Circadian rhythms, Demodulation, Sampling, Tables(Data), Charts, Physiological effects, Battlefields

Distribution Statement : APPROVED FOR PUBLIC RELEASE