“ @aldel Thanks, Aldel, for explaining the errors in the blog post.  It's a confusing topic, and unfortunate that a many people will confused if this... (read full comment) ” 

Posted on April 6, 2012 at 8:09 AM EDT

“ Yes, the piston will get hot. And in this design it contains a magnet that will be demagnetized if it gets hot. That's one of the many problems... (read full comment) ” 

Posted on October 4, 2008 at 8:23 PM EDT

“ Simpler? If you are going to create an image by scanning a laser on a flexible screen, wouldn't it be simpler, cheaper,and brighter if you used a... (read full comment) ” 

Posted on October 4, 2008 at 7:55 PM EDT

“ In cities where transit is the norm (e.g., large cities in Germany and Japan) stores offer delivery service. When you buy large stuff, you expect... (read full comment) ” 

Posted on November 25, 2007 at 9:34 AM EST