[time-nuts] nubie querie

Mike Feher mfeher at eozinc.com
Fri Mar 5 16:17:00 UTC 2010


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-bounces at febo.com [mailto:time-nuts-bounces at 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
>>> 
> 
> 
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