User contributions for 117.103.68.9

27 July 2012

• 05:0405:04, 27 July 2012 diff hist +110‎ Ubiquitous Human Computing ‎ →‎Potential Difficult Problems in the Future

13 June 2012

• 01:2601:26, 13 June 2012 diff hist +295‎ Ubiquitous Human Computing ‎ →‎The Difficult Issues