Implementation of Collaborative E-Learning System for Unstable Environment - Kazuhiko Sato; Suresh Shrestha; Pramesh Shrestha; Bishnu Prasad Gautam (2016 Intl IEEE Conferences on Ubiquitous Intelligence & Computing, Advanced and Trusted Computing, Scalable Computing and Communications, Cloud and Big Data Computing, Internet of People, and Smart World Congress (UIC/ATC/ScalCom/CBDCom/IoP/SmartWorld), Toulouse, France, July 18-21, 2016, 2016)