Tuesday, December 14, 2010
Monday, December 13, 2010
Monday, November 29, 2010
Friday, November 26, 2010
The real world comes to the rescue. I am constantly amazed about new lows in pricing for about everything computer related, and this time it was virtual server hosting. I mean, I used to be up to date, but then some time passed when I was busy otherwise, and now suddenly one can get a small Xen instance with Gentoo preinstalled and unlimited server traffic for 5€ per month! OK, I may in the end go for a slightly bigger package since the data does not entirely fit into 20GByte, but anyway... rsync is running. :)
Wednesday, November 10, 2010
So, what else can we do? Turns out, there is a really nice solution for this problem, as long as you already run KDE and use it to view documents: remove the Reader plugin completely, and just install kde-misc/kpartsplugin. Automatically, after a Firefox restart, your browser can display everything that a KPart is available for. This means, a pdf or ps will get you an embedded viewer just like Okular, and much more... Somebody has been thinking this through a lot, you get buttons "Open in separate application" and "Save as file", and if there are several KPart's available, you can choose one and optionally save that preference. Works great here, and the pdf display is way faster!
Tuesday, November 2, 2010
cassis ~ # uname -a... taken me some time to realize that I need an "always on" home server. Not really for big amounts of data or lots of computing power, but for the small conveniences - as printing easily from my laptop to my usb printer, or staying always online on freenode with a quasselcore. The first is something most DSL routers can do today, the second they usually can't. And besides, where is the fun with a prepackaged solution? Requirements: runs Gentoo, is absolutely silent, low power consumption, some hard disk space, USB ports.
Linux cassis 2.6.36-gentoo #1 Sat Oct 30 01:34:28 CEST 2010 armv5tel Feroceon 88FR131 rev 1 (v5l) Marvell OpenRD Ultimate Board GNU/Linux
At first I tried a GuruPlug, but what I did not realize until it was on my desk: it's fan makes quite some noise, and there's unfortunately no soundproof server rack in my flat. So, now I have settled for a (fanless) OpenRD Ultimate board, and I can say it really lives up to my expectations so far. For those who know Raúl's SheevaPlug installation instructions, the process can here be done roughly the same way, with two small caveats:
- Raúl's kernel does not work, we need at least 2.6.35 (I'll place a binary online... see below)
- The console kernel parameter needs to be console=ttyS0,115200n8
Finally (but that applies to both devices of course, they are binary compatible), what I find really astonishing is how many Gentoo packages "just work" on these arm gadgets, even if they dont have the ~arm keyword (yet). This is really the power of a source-based distribution. Cheers!
UPDATE: Try the kernel image from here (together with Raúl's initrd) and tell me if it works! Untested so far...
Saturday, October 16, 2010
Friday, October 15, 2010
That's one side of the story. The other side is that in 1962 the University of Regensburg was newly founded. Today, it has about 17000 students, with a campus in walking distance from the city centre. With the influx of students, the city center is thriving. The old architecture is no good for cars, so most of the center is ~pedestrian area. Many student dorms and rental flats are there, even in historical buildings dating back hundreds of years. The density of cafes, bars, beer gardens, pubs is amazing. I live straight in the middle, and when I get back from the office or lab in the evening I am again and again astonished at the athmosphere around me... Just a few steps away there's a medieval basement turned into a popular restaurant/bar place with the nice name "The Mended Drum"... When there's a slowdown in work, I'll for sure some day again take my camera and tripod and try to capture the spirit of the city - as long as I'm not in some bar sipping drinks with friends. Anyway, enough for today. :o) Cheers!
Tuesday, October 5, 2010
Sunday, October 3, 2010
Afterwards, well, normal work started again. I finally have been able to more or less finish the proofreading of one BSc and one Diploma thesis. Friday a first oral exam marked the beginning of a new series during the upcoming weeks (the student did OK), and then it was finally weekend. :)
Tuesday, September 28, 2010
Saturday, September 25, 2010
Friday, September 24, 2010
Thursday, September 23, 2010
Saturday, September 18, 2010
Thursday, September 16, 2010
Here's my first real piece of Gentoo news: kipi-plugins-1.3.0 and digikam-1.4.0 have been bumped from the kde overlay to the main tree. Be warned that both require kde-4.5... And to answer the question before it is asked, I only bumped kipi-plugins-1.3.0 since this is what we already had. I know 1.4.0 is out there too... soon... :) Via a few corners, Fortran may still be required (digikam uses sci-libs/clapack, which depends on virtual/blas) - that's something that can and will still be fixed sometime. Enjoy!
Monday, September 13, 2010
|Grignano harbour and the|
By the way, the large building on the right edge of this photograph is the Adriatico Guesthouse of the ICTP (International Centre for Theoretical Physics).
Friday, September 10, 2010
Wednesday, September 8, 2010
Tuesday, September 7, 2010
Compared to actual experimental physics, I have a tendency to think of astronomy as boring. Come on, it's not as if you can quickly flip a switch on your warp drive, have a close look what's really out there and tinker with it a bit. But, every now and then something amazing is discovered, as this stunninly beautiful spiral with a size of 1/3 light year. A gigantic sprinkler, lit by background galactic starlight... There's more information on it directly on the Hubble space telescope website, including the original paper discussing the discovery. Great!
Sunday, September 5, 2010
PS. You can buy ethernet cables here in the guesthouse 24h per day from a vending machine. Right now they are sold out though... :)
Sunday, August 29, 2010
Friday, August 27, 2010
A quick note on the name of this blog. "dilfridge" is lab slang for "dilution refrigerator" - a pretty complex (and expensive) apparatus, that has anyway become something of a standard tool in low-temperature physics labs worldwide, for reaching the temperature range 0.003K - 0.3K (degrees above absolute zero). My research experiments take place at these temperatures, and after some years I find the technology still fascinating...