); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY In a message dated 10/14/2007 23:07:04 Pacific Daylight Time, [EMAIL PROTECTED] writes:
>Thermal transients propagate into the ground on a different law, >Gauss' Error Function. >If the ground is cleared of trees, one hundred years later at a depth >of 100 metres or >so there will be a record of the change in average soil temperature. >The Cave was Saltpetre Cave in Carter Caves Park. >Just thought you might like to know..... >Neville Michie Hi Neville, your post made me remember stuff from my University days! Gauss' Error Function is also used to calculate diffusion depth of semiconductors. HP/Agilent makes a semiconductor tester to measure this depth. One interesting fact I remember from this: the form of the diffusion profile depends on the speed (time) of the actual diffusion process into the bulk material. I bet there is a nice analog to temperature transients progressing through soil. I love it when micro and macro effects show mathematical similarities. bye, Said ************************************** See what's new at http://www.aol.com _______________________________________________ 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.
