User: youngcho

It could also be that it was too cold

On: 1928 Time Traveler Caught On Film?

I see people do that in cold places... pull up their collar to keep warm

Covering her face with collar of her coat

On: 1928 Time Traveler Caught On Film?

It is obvious that she is covering her face either away from the camera or from sun light. And what she's holding is the collar of her coat.

DETER Testbed

On: Simple Virus For Teaching?

You should look into using DETER Testbed for this type of class. http://www.isi.edu/deter/ In short, DETER is an Emulab clone for Network Security type of experiments. There is an on-going effort to promote DETER for education purpose and the DETER team has access to several types of virus. https://education.deterlab.net/ Hope this helps. Young