I can be reached by telephone at 516-877-4483, or (preferably) by email at sbloch@boethius.adelphi.edu. FAXes can be sent to me ("Attn: Dr. Bloch, Math/CS Dept") at 516-877-4558.
I'm in my office and available for consultation from 8:30-5:00 most weekdays, except when teaching a class.