Work in progress - semantic annotations and teaching analytics on lecture videos in engineering educationSaar, Merike; Kusmin, Marge; Laanpere, Mart; Prieto, Luis P.; Rüütmann, TiiaProceedings of 2017 IEEE Global Engineering Education Conference (EDUCON) : 25-28 April 2017, Athens, Greece2017 / p. 1548–1551 http://dx.doi.org/10.1109/EDUCON.2017.7943055