This is a cool concept, though it appears to only care about the total number of people being below a set threshold regardless how people interact (i.e. maintain social distancing)
Shameless plug: two friends and I put together a small app that uses security cameras feed to calculate real-time density + estimate "safe" space capacity:
Very interesting experiments. I have been thinking for a long time that it's a good idea to do these atomic tests. About test 8, it is actually well known that if you want accuracy vs # of epochs, decrease the batch size -- however it causes time inefficiency. And I found number 7 quite surprising!