Troubled sleep is a commonly cited consequence of adolescent drug use, but it has rarely been studied as a cause. Nor have there been any studies of the extent to which sleep behavior can spread in social networks from person to person to person. Here we map the social networks of 8,349 adolescents in order to study how sleep behavior spreads, how drug use behavior spreads, and how a friend's s...

The aim of the study was to examine the adaptation of participants to a common night work schedule using urinary 6-sulphatoxymelatonin (aMT6s) concentration as the circadian phase marker. Fifteen adults (7 male, 8 female, age = 21.9 yr) spent nine consecutive nights in the laboratory, including: (i) adaptation sleep, (ii) baseline sleep, and (iii) seven simulated night shifts (23:00-07:00 h) fo...

As the Internet matures, policy questions loom larger in its operation. When should an ISP, city, or government invest in infrastructure? How do their policies affect use? In this work, we develop a new approach to evaluate how policies, economic conditions and technology correlates with Internet use around the world. First, we develop an adaptive and accurate approach to estimate block availab...

A person sleeps a third of his or her life, which means that a person sleeps seven or eight hours a day. However, many people suffer from disturbed sleep. In this paper, we try to segment a video into shots using the method of Bhattacharyya Distance. After analyzing these segmented shots, we decide a movement during sleep. We also try to record all the breath from the beginning of the sleep to ...

Unihemispheric sleep, during which one half of the brain sleeps while the other half remains awake, is seen in some aquatic mammals and birds, particularly in risky situations. It now appears that humans sleeping in unfamiliar environments do something quite similar.

The optimal anesthetic technique for transvaginal ultrasound guided oocyte retrieval (TUGOR) is not known. We present a case series of patients having TUGOR under intravenous remifentanil infusion and paracervical block (PCB). One hundred four unpremedicated patients were included in our study. After monitoring heart rate (HR), mean arterial pressure (MAP), peripheral oxygen saturation (SpO2) a...

Reducing the energy consumption of computers is becoming increasingly important with rising energy costs and environmental concerns. It is especially important for mobile devices such as laptops where battery lifetime is always an issue. Sleep states such as S3 (suspend to RAM) save energy but prevent the device from responding to incoming network events, for example remote desktop logins and f...