File:Periodogram.jpg
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Examplary spectrogram shows a sleep with a prevailing frequency corresponding with a period of 24.454 hours (i.e. 27 minutes more than a 24 h day-night cycle). There is also a cluster of periods around 12.1-12.8 hours (those are reflected by a midday circadian low time suitable for siesta naps)
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:09, 13 October 2013 | | 1,278 × 951 (214 KB) | SuperMemoHelp (talk | contribs) | Examplary spectrogram shows a sleep with a prevailing frequency corresponding with a period of 24.454 hours (i.e. 27 minutes more than a 24 h day-night cycle). There is also a cluster of periods around 12.1-12.8 hours (those are reflected by a midday circ |
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