Geeky detail: For some reason I had set Apache to try and parse every file on the site for server-side includes. Now it only parses certain pages but I may have missed some that need it. If you find anything broken, let me know. (A nice side-effect is that now all pages will have ETags and Last-Modified dates.) I also turned on mod_gzip so now HTTP/1.1 clients can get the same information with less bits (and hopefully sooner).

Reed’s submission to the FCC on open spectrum explains why using “bandwidth” to mean “information rate” is wrong. Bandwidth is a measurement of how much of the radio “spectrum” is being used. We used to think that bandwidth was directly proportional to information rate (like bits per second) so many used the terms interchangably (more frequencies used meant more bits per second). This specific confusion turned into a generic one when bandwidth begun being used to mean information rate even when radio is not involved. But even with radio waves, we’ve since discovered that this isn’t true — there are ways to increase information rate within the same bandwidth.

This open spectrum stuff is really exciting. I couldn’t really get excited about ultrawideband or software defined radio, but the larger picture is much more interesting. I hope to write a LogicError article explaining why soon.

posted November 25, 2002 08:48 PM (Technology) #


greenspan# make economy
I’ll be at Comdex
Stirling Engine introduced on 60 Minutes, Segway on
cupcake controls a prior restraint?
photographic beauty
bandwidth and open spectrum
the rss rebellion
Total Information Awareness Demo
Creative Commons Launch!
the next eldred
web publishing is also typography (The Elements of Typographic Style)

Aaron Swartz (