Hi
There's a paper in the February IEEE UFFC transactions proposing that the SI standard of mass be replaced with a 1 KG quartz resonator. It's by Vig and Howe, so a copy should be freely available soon. It currently shows up as "submitted" on the NIST site. The short version: The SI mass standard is a 100+ year old lump of metal in Paris. Coming up with something that can be related to a time or frequency measurement could vastly improve the ability to measure any changes in the lump. With adequate care, you might be able to make a great big quartz resonator that would do the trick. There's lots of "if you could do it, it would be a big step forward" stuff in the paper. The solutions to a lot of the design challenges either are not yet fully worked out, or are being saved for the next paper. Anybody out there with a pre-WWII GR 100KHz bar standard might find a whole new customer base. Bob _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
