[Beowulf] on powering off and its character

[mathog]

On 08-Aug-2014 12:00, Lux, Jim (337C) wrote:

> On the power lines from Northern California to Southern California, for
> instance, a switching transient can take more than 8 hours to die out, 
> as
> it propagates around, bouncing back and forth.

Large water lines have somewhat similar issues.  It took them 3 hours to 
shut off the recent water main break near UCLA not because they couldn't 
turn the shutoff valve any faster, but because if they had done so the 
resulting pressure spikes going back up the pipe would have blown up 
other water lines.

Regards,

David Mathog
mathog at caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech