User: jazeeb

Auto generated temp addresses

On: Major ISPs Publish Anti-Spam Best Practices

I created a simple script to generate temporary email addresses that I can use to post on the web. I send an email to temp_address@mydomain.com and qmail sends me an email address that forwards mail to my normal address in a form like expire_07day_20040618_103454fqcv@mydomain.com my crontab removes the aliases that are older than 7 days. Very convenient and works nicely. Coincidentally, Yahoo mail added this type of feature at about the same time I did.

Re:Accelerating

On: The Physics of Baseball

I think the answer to this is to consider conservation of momentum, ie: change in momentum = Force.
After the ball has left the bat, (and still compressed) the only external forces acting on the ball is gravity and air resistance. The ball will not accelerate in the horizontal direction due to the effect of compression/decompression because there is no external horizontal force acting on it.
The decompression will make the ball undulate like a water droplet in space, but not change it's velocity.
Air resistance will change based on the shape of the ball, but that is another matter.