Sleep

Chronotype refers to the behavioral manifestation of underlying circadian rhythms of myriad physical processes.

f.lux is a computer program that adjusts a display's color temperature according to location and time of day.

A nightmare, also called a bad dream, is an unpleasant dream that can cause a strong emotional response from the mind, typically fear but also despair, anxiety and great sadness.

Snoring is the vibration of respiratory structures and the resulting sound due to obstructed air movement during breathing while sleeping.

Rapid eye movement sleep (REM sleep, REMS) is a unique phase of mammalian sleep characterized by random movement of the eyes, low muscle tone throughout the body, and the propensity of the sleeper to dream vividly.

An alarm clock (or sometimes just an alarm) is a clock that is designed to alert an individual or group of individuals at specified time.

A bedroom is a room of a house, mansion, hotel, dormitory, or apartment where people sleep.

Hibernation is a state of inactivity and metabolic depression in endotherms.

A biorhythm (from Greek βίος - bios, "life" and ῥυθμός - rhuthmos, "any regular recurring motion, rhythm") is an attempt to predict various aspects of a person's life through simple mathematical cycles.

Night terror, also known as sleep terror, is a sleep disorder, causing feelings of terror or dread, and typically occurs during the first hours of stage 3-4 non-rapid eye movement (NREM) sleep.

"Rip Van Winkle" is a short story by American author Washington Irving published in 1819.

Redshift is an application that adjusts the computer display's color temperature based upon the time of day.

Dr. Richard Ferber is the director of The Center for Pediatric Sleep Disorders, at Children's Hospital Boston.

The WakeMate was an electronic device with sensors intended to be used to monitor the sleep state of the user using actigraphy.

Memory is the cognitive process whereby experiences, learning and recognition are recalled.

Sleepio is a digital sleep-improvement program featuring cognitive behavioral therapy (CBT) techniques developed by sleep scientist Professor Colin Espie and ex-insomniac Peter Hames.

Pauly Beds or J.

Go the Fuck to Sleep is a book written by American author Adam Mansbach and illustrated by Ricardo Cortés.

Somnolence (alternatively "sleepiness" or "drowsiness") is a state of strong desire for sleep, or sleeping for unusually long periods (compare hypersomnia).

SleepBot is a mobile app and Web application.

Zeo, Inc., formerly Axon Labs, was a private company founded by Brown University students.

Hästens Sängar AB, Hästens Beds AB or simply Hästens (Swedish pronunciation: [hɛstens]); is a Swedish manufacturer established in 1852, today specializing in beds, bedlinen, pillows and lifestyle accessories.

A bedtime story is a traditional form of storytelling, where a story is told to a child at bedtime to prepare the child for sleep.