My "office hour" is basically a period when I am in my office and available for consultation. I am pretty flexible, however - if that time is not suitable for you, it should easily be possible to find another. The easiest way to fix an alternative appointment, or just consult me in general, is to e-mail. My e-mail address is written plainly on a paper on my office door (A510), but if I write it out plainly here I will be inviting all sorts of junk mail as the web trawlers pick it up. So I'll write it partly in words. "Dot" of course means "full stop" or period, "at" is the sign "@", and "plus" just means "join together", so "i plus c plus stirk" is "icstirk". Now you should be able to work out my e-mail address:

i plus c plus stirk plus at plus hcn plus dot plus zaq plus dot plus ne plus dot plus jp

Clear enough?