Archive for March, 2008

Kernel panic

March 5th, 2008

kaboomI like my OS best when it ticks away in the background peacefully, gives me a few stats if i ask for it, but basically shuts up and does its job. I like to know what’s going on, more or less, but i’m definitely an inhabitant of userland.

Yesterday, however, my 5-years old desktop decided to die on me. Or, to be more precise:

Kernel panic – not syncing: Attempted to kill init!

Which told me that something not right, and i couldn’t watch my movie. I ran memtest since it comes prepackaged … and that froze, after a while. Mh.

A post morten was called for, if only out of respect. I booted on an old boot disk Gentoo liveCD), and mounted the hard drive partitions, but couldn’t find any useful forensics. Will teach me to look at my logs more often, i guess. Worse, i’m not positive that i’ve not been hacked.

On internet: i actually found a good common-sense post. I’m gonna have a look at the kernel code, just out of curiosity.

But to be honest, i think my PC’s day as a desktop are over. I’m very much minded to turn it into a svn server cum media server (and any other uses of the kind i can think of).

That last bit was asked by my non-geek bf, my first plan was to make it my FreeBSD testing ground + webserver + svn server (since i’m told FreeBSD has nice things called jails). But i guess the media player bit doesn’t really fit in there. Things we do for love.

Barcodes are amongst us

March 1st, 2008

A while ago i went to this BIABH meetup where we talked about the future pervasion of the web into the physical world. One of the ways of doing that was to have barcodes encoding URIs labeling the reality around us.

Well, i just generated one of the types of 2D barcodes for my blog with a generator (through Denis):
QR code
This is a QR code. From what i read, this is patented, but the specs are known and the patent is not enforced. So open-in-all-but-name, so far (update: there’s even a whole webzine on the subject).

This is far from being the only standard around. The wikipedia lists a fair-sized lists of possibilities. Close to 30 for 2D barcodes, most of them proprietary.

As i said before, the use of barcode-reading software in phones is now effectively standard in Japan. Wonder when it will come to us. But then again, it will only be of wide-spread use when surfing will be common (and cheaper) on phones.

Also, what will the uses be ? I can imagine some good games involving putting barcodes around town. For tourism as well: forget the audio guides, just surf to the site with your phone. When shopping, you check out the specs of your product online.

Actually, the nicest application i’ve seen so far is described in this article (while ago in IEEE Computer, i think): Assistive Technologies for Grocery Shopping for the Blind. It’s brilliant, in a way, combining existing and cheap technologies in an inventive way: barcode reader, internet, text-to-speech software.


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