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  2. Power nap - Wikipedia

    en.wikipedia.org/wiki/Power_nap

    A power nap, also known as a Stage 2 nap, is a short slumber of 20 minutes or less which terminates before the occurrence of deep slow-wave sleep, intended to quickly revitalize the napper. The expression "power nap" was coined by Cornell University social psychologist James Maas. [2] The 20-minute nap increases alertness and motor skills. [2]

  3. Nap - Wikipedia

    en.wikipedia.org/wiki/Nap

    A nap is a short period of sleep, typically taken during daytime hours as an adjunct to the usual nocturnal sleep period. Naps are most often taken as a response to drowsiness during waking hours. A nap is a form of biphasic or polyphasic sleep, where the latter terms also include longer periods of sleep in addition to one period. For years ...

  4. Polyphasic sleep - Wikipedia

    en.wikipedia.org/wiki/Polyphasic_sleep

    Longer naps were found to be better, with some cognitive functions benefiting more from napping than others. Vigilance and basic alertness benefited the least while working memory benefited greatly. Naps in the individual subjects' biological daytime worked well, but naps in their nighttime were followed by much greater sleep inertia lasting up ...

  5. Microsleep - Wikipedia

    en.wikipedia.org/wiki/Microsleep

    Microsleep is extremely dangerous when it occurs in situations that demand constant alertness, such as driving a motor vehicle or working with heavy machinery. People who experience microsleeps often remain unaware of them, instead believing themselves to have been awake the whole time, or to have temporarily lost focus.

  6. Multiple Sleep Latency Test - Wikipedia

    en.wikipedia.org/wiki/Multiple_Sleep_Latency_Test

    The nap trial begins when the lights are turned off. [9] The patient is asked to perform simple tasks to test that the equipment is working properly. The patient is asked to nap for 20 minutes, and then is awakened. The nap process is repeated every 2 hours for a total of four or five times.

  7. Social system - Wikipedia

    en.wikipedia.org/wiki/Social_system

    In sociology, a social system is the patterned network of relationships constituting a coherent whole that exist between individuals, groups, and institutions. [1] It is the formal structure of role and status that can form in a small, stable group. [1]

  8. Social capital - Wikipedia

    en.wikipedia.org/wiki/Social_capital

    Social capital is a concept used in sociology and economics to define networks of relationships which are productive towards advancing the goals of individuals and groups. [1] [2] It involves the effective functioning of social groups through interpersonal relationships, a shared sense of identity, a shared understanding, shared norms, shared values, trust, cooperation, and reciprocity.

  9. Sociological theory - Wikipedia

    en.wikipedia.org/wiki/Sociological_theory

    A sociological theory is a supposition that intends to consider, analyze, and/or explain objects of social reality from a sociological perspective, [1]: 14 drawing connections between individual concepts in order to organize and substantiate sociological knowledge.