Got some new hardware installed.

Jul 20 2019

For a couple of years now, I've had my eye on the community of people who've had RFID or NFC chips implanted somewhere in their bodies, usually in the back of the hand.  If you've ever used a badge to unlock a door at work or tapped your phone on a point-of-sale terminal to buy something, you've used one of these two technologies in your everyday life to do something useful.  What I've wanted to do for a while was use an implanted chip as a second authentication factor to my servers for better security.  As for why I couldn't just use something like a key fob or a card or something.. there were a bunch of reasons, most of them having to do with only being able to find what I needed in bulk or the cost being too high because the equipment was aimed at corporate IT departments, where they have a need to crank out a couple of dozen ID badges an hour.  There is also the fact that, while I've been curious about various forms of body modification over the years I never really got into into them for a couple of reasons that probably aren't terribly interesting so why not do something useful?

Due to the fact that not everybody is going to be okay with me talking about an elective medical procedure, I'm going to put the rest of this article after the fold.

Well, that was a hair raising experience.

Jun 02 2016

Last Thursday morning I went in to have a certain problematic molar taken care of at the dentist's office before it got much worse. To recap briefly, there is a particular molar on the bottom-left side of my mouth that has been through hell: It's broken several times (once particularly memorable time while eating a German soft pretzel, of all things), it's been filled several times, and I've honestly lost track of the number of root canals performed done on it (somewhere between three and six in the last fifteen years). While getting the abscessed #19 tooth taken care of, it was observed that it was looking a little dodgy. To be somewhat more specific, the crown on it was loose and wiggling, and I started to notice a black line on the gum just below it.

The rest is going under a cut because I'd like to save people who don't specifically want the down-low the writeup. For those of you with relatively delicate constitutions suffice it to say that I hope I never experience that again in my life.

3D printing of nanomaterials and implanted prosthetic limbs.

Apr 02 2016

Long-time readers of my site no doubt know of my fascination with the field of 3D printing and tracking the advances that are made almost weekly to this technology. From simple plastic tchotchkes to replacement parts to materials that few ever dreamed would be used, 3D fabbers are fast becoming an integral part of manufacturing at all levels of complexity. A few months ago researchers at Lawrence Livermore National Laboratory published the results for a revolutionary 3D printer called the Optomec Aerosol Jet 500, a fabber which uses a range of nanomaterials as its feedstock. To cut to the chase they've been using it to construct electronic components and integrated circuits at the molecular level, laying down conductive pathways in three dimensions, constructing semiconductor units material by material, and linking everything together into working circuitry in situ. Current semiconductor prototyping fabs are huge, on the order of thousands of square feet in size but the Optomec is just slightly over 250 square feet in size, well within the working space of your average science lab (and doesn't use any of the incredibly dangerous chemicals ordinarily involved in semiconductor manufacture). The new generation fabber prints at a resolution of 10 microns, which is about the size of a large grain of pollen or silt but far to small for the human eye to discern unaided. I don't know when this technology will leave the lab but you can bet that the semiconductor giants are going to be keeping a close eye indeed on them, if only because eliminating many of the chemicals they use would raise their bottom line significantly (by not needing to worry about licensing and disposal costs).