The U-learning
According to Lyytinen & Yoo (2002), the evolution of ubiquitous computing has been accelerated by the
improvement of wireless technology and the flexibility of the technology. In general, a widely accepted
definition of mobile learning is using mobile technologies to facilitate learning while a popular definition of
ubiquitous learning is emphasizing on the learning context where learning can happen at anywhere and anytime
with the ubiquitous tools (Hwang, Tsai 2011).