X-Message-Number: 20982 Date: Mon, 27 Jan 2003 05:21:25 -0500 From: Thomas Donaldson <> Subject: CryoNet #20963 - #20971 For Yvan Bozzonetti: There seems to be an argument here about whether nanodevices might be created to store hydrogen at high enough densities to be useful. For what it's worth, there are chemical methods to do this already, one of which is being worked on by a company with the specific intent of storing hydrogen. Borohydride (a compound of hydrogen and boron) seems to do it well enough for use. For Mike Peters: Hold on a minute here! If it matters to you, you need not define the relation between A, B, and C as that of continuer, but as that of having characteristics historically related to one another. B and A and C and A are both historically related, but then (like Canada and Australia) B and C are also historically related. It's true that B and C aren't continuers, but you may have shown that "continuer" just isn't the right notion for the relations you want. It is certainly true that we forget lots of things between when we were (say) 20 and when we were 50. We learn things too. We would like to say that we are the same (sometimes) and different (other times). I would say myself that we are looking at close historical relations, close being defined as no major changes over periods of (say) one day, "major" referring to a change important to the person before or after it happens. BUT this is not a statement about the world, it is an attempt to state how I feel I can be the same as the person who did a maths PhD at the U of Chicago starting in 1965, or did waterskying on the Ohio River when I was 15. Best wishes and long long life to all, Thomas Donaldson Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=20982