Virtual portraits from rotating selfies

Editorial: Understanding Selfies

Moche Portraits from Ancient Peru

About thirteen centuries ago in the northern coastal region of what is now Peru, a ten-yearold boy was selected by the leaders of his community to become, eventually, a great leader himself. As he grew older, he took on more and more responsibility, and finally he achieved his destiny as a man of high status and regard. During his adult life, he occasionally participated in a form of one-onone ...

Ambivalent effect of member portraits in virtual groups

Knowledge exchange with shared databases can be seen as a public-goods dilemma. People are reluctant to contribute information because they save time, effort and perhaps social power if they withhold their knowledge and socially loaf. But if all people choose this individually efficient strategy, then no information exchange can take place, and the group is less effective than it would have bee...

From Camera to Deathbed: Understanding Dangerous Selfies on Social Media

Selfie culture has emerged as a ubiquitous instrument for selfportrayal in recent years. To portray themselves differently and attractive to others, individuals may risk their life by clicking selfies in dangerous situations. Consequently, selfies have claimed 137 lives around the world since March 2014 until December 2016. In this work, we perform a comprehensive analysis of the reported selfi...

Large-Scale Sleep Condition Analysis Using Selfies from Social Media

Sleep condition is closely related to an individual’s health. Poor sleep conditions such as sleep disorder and sleep deprivation affect one's daily performance, and may also cause many chronic diseases. Many efforts have been devoted to monitoring people's sleep conditions. However, traditional methodologies require sophisticated equipment and consume a significant amount of time. In this paper...