The ability of radiation to cause cancer is dependent on whether or not the radiation is able to alter chemical bonds. This occurs when electrons involved in bonding in a molecule absorb radiation with enough energy to allow them to escape – this is called ionization. The thing is, whether or not radiation is ionizing is based solely on its energy, not on its number, and as we saw above, its energy is determined entirely from its frequency.

Cool article on WordPress.com about Why Cell Phones Can’t Cause Cancer, But Bananas Can, which I read while eating (and finishing) a banana. It covers dielectric heating too.

Panels Finished

Asides

My last panel was yesterday at 5 PM so now I’m taking as much time as I can to catch the panels that are left and learn a few things. Speaking was more stressful than I expected but most of the feedback was good. I still need to check out the web feedback though, as people are probably more candid online than when they’re shaking your hand.

Usable Security

Asides

Usable Security is a new blog about—you guessed it—the intersection of usability and security. This comes up every few weeks since I improved the error messages on the WordPress login (and bbPress) to specify which part of the login was mistaken, the username or the password. Security folks see this as a problem because you’re revealing more information but I see making the error message more generic as premature security optimization. Plenty of systems where login names are public or easily discoverable, such as Yahoo, Gmail, Hotmail, most email systems, and so forth, seem to be doing just fine.