CSCW
2008
ACM
14 years 20 days ago
2008
ACM
Within a group of peers, it is often useful or interesting to know whether someone in the group has gone to bed or whether they have awakened in the morning. This information, nat...
TEI
2009
ACM
14 years 5 months ago
2009
ACM
This paper presents the Digital Hourglass, an alarm clock that focuses on the amount of sleep, rather than wake-up times. It follows a simple approach, lighting one LED for each h...