Archive for date: October 17, 2005

Comments now fixed

October 17, 2005 | General, System Notices | By: Mark VandeWettering

Mneptok let me know that comments on my blog were broken (I had forgotten to reinstall Image Magick when I upgraded the operating system). That should be fixed now. Let the comments commence!

DocuColor Tracking Dot Decoding Guide

October 17, 2005 | Cryptography, Security | By: Mark VandeWettering

Xerox printers use a watermarking technique to insert codes onto all printed documents from their Docucolor color laser printers. These identify date, time and printer serial number with a grid of yellow dots which appear in the printout. Presumably these codes are inserted to make the job of the Secret Service simpler in tracking their […]

Of Prions and People

October 17, 2005 | Science | By: Mark VandeWettering

Wow: another terrific article from The Panda’s Thumb, which is quickly becoming one of my favorite destinations on the web. This article is discussing some of the interesting research surrounding prions, self-propagating variants of certain proteins that are the infectious agents behind diseases like scrapie, bovine spongiform encephalopathy, and variant Cruetzfeld-Jakob disease. What’s really interesting […]

Andromeda Galaxy in IR

October 17, 2005 | Astronomy | By: Mark VandeWettering

Courtesy of the Bad Astronomy Blog, some very nice images of our closest galactic neighbor M31, the Andromeda Galaxy taken with the Spitzer telescope in infrared. It shows a great deal of detail which is missing from visible light photographs. Very nice. (Okay, okay, there are the Magellenic clouds, and other dwarf galaxies that are […]