All of this reminds me of a cartoon I saw ages ago, I think was called "BC". Characters were from the cave-man era. Regardless, in one cartoon there is a guy sitting in the middle of a desert. His friend comes up and asks him what he is doing. The guy replies that he is going to count all of the sand in the desert. His friend says - you are crazy, that will take forever. The guys says, what you think, I am that stupid? I just count every other one, when I am done I will just double it. Regards - Mike
Mike B. Feher, N4FS 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 -----Original Message----- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp Sent: Friday, March 05, 2010 11:02 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] nubie querie Hi So can you / do you actually *see* the last grain in the hourglass in question? If we are looking at something that is not observed in "normal operation" we have re-defined the function of the device. Bob On Mar 5, 2010, at 10:50 AM, Raj wrote: > The variability will depend on friction between particles and the last particle's physical slide down the glass! > > At 05-03-10, you wrote: >> Hi >> >> Even defining when the sand timer is "done" is not a real simple thing. Waiting for that very last particle to drop may not be the best approach. >> >> Bob >> >> >> On Mar 5, 2010, at 9:20 AM, Tom Holmes, N8ZM wrote: >> >>> tvb... >>> >>> Not to kick sand in your face, but it seems that in order for your automated >>> turn-over device to work, as well as to accurately measure the time >>> intervals, you would need a means to determine when the sand quits flowing. >>> Possibly an accelerometer or microphone, with the added benefit of being >>> able to hear the close-in phase noise. >>> >>> I admire your dedication to monitoring the hour long periods of the sand >>> timer so diligently. Truly a time-nut! >>> >>> Regards, >>> >>> Tom Holmes, N8ZM >>> Tipp City, OH >>> EM79xx >>> > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
