aci·16 năm trước·discussThis is not only your impression. Look for example at this Wikpedia page: http://en.wikipedia.org/wiki/List_of_countries_by_income_equ...
aci·16 năm trước·discuss"I want to tell them how awesome it is that they are doing it, but am never sure if that's the right thing to do some stranger lol."General heuristic: If you are not sure, if it is right to approach a stranger, just do it. Really. Talk to them next time.And don't end your sentences with "lol", please.
aci·17 năm trước·discussI've seen a simple implementation, with a splitscreen and a table of content based on the slides here:http://videolectures.net/epsrcws08_campbell_isvm/The ability to see the slides on the split screen and jump to previous slides via the table of contents really helped me as a user much.