New horizons in web based learning : ICWL 2014 international workshops, SPeL, PRASAE, IWMPL, OBIE, and KMEL, FET, Tallinn, Estonia, August 14-17, 2014 revised selected papers - Cao, Yiwei; Väljataga, Terje; Tang, Jeff K. T.; Leung, Howard; Laanpere, Mart (Lecture notes in computer science, 2014)