Christian Vogel

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Christian Vogel

Frequentou Friedrich-Alexander-University, Erlangen-Nuremberg

Morou em Dillberg, Postbauer-Heng

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Christian Vogel

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Full Disk Encryption with Cyanogenmod CM12.1 on a Samsung Galaxy S4 Mini
If you try to enable full disk encryption on Cyanogenmod CM12.1 using the normal settings menu ( Security -> Encrypt Phone ) it doesn't work, the phone will just soft-reboot and nothing will have happened. If you "logcat" the debugging log of your phone (us...

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Full Disk Encryption with Cyanogenmod CM12.1 on a Samsung Galaxy S4 Mini

vogelchr.blogspot.com

Christian Vogel

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(note that I made a typo in the mkfs command line which results in a unusable 500MB /data filesystem... :-(. So I made an update showing how to fix that.)

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Christian Vogel

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Not Even Close: The State of Computer Security (with slides) - James Mickens

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Christian Vogel

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Public Service Announcement: Putty
A recent upgrade of sshd apparently broke my saved putty connections, which have a deprecated key-exchange protocol on the top of the "Algorithm selection policy." It manifests itself as a long pause, showing a black putty terminal window, followed by the m...

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Public Service Announcement: Putty

vogelchr.blogspot.com

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Christian Vogel

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A hillarious 70s style advertising for the 1.0 release of a text-editor... (just in case you haven't heard of Atom before).

https://www.youtube.com/watch?v=Y7aEiVwBAdk

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Introducing Atom 1.0!

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Christian Vogel

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Ben Krasnow compartilhou originalmente:

Electron microscope video of phonograph needle in an LP groove. About 1/400 actual speed. Captured via Tektronix MDO3000 oscilloscope.

This video was made via the "stop motion" animation technique. I moved the LP by 50 microns at a time, and captured a frame after each move. The setup inside the microscope was made possible by the fact that there are two separate stages with their own motion controls. I fixed the needle to one stage and the LP to the other so that I could get both parts into the frame at a good angle.

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Fotos do Ben Krasnow

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Christian Vogel

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From a discussion about a new kind of ball-bearing with dubious properties...

❝Anyway, this should be perfect for my perpetual motion machine. Less friction means it'll run for more forevers before it stops.❞

https://news.ycombinator.com/item?id=9588547

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New Greaseless Bearings Spin with 10 Times Less Friction | Hacker News

news.ycombinator.com

The friction under zero load is rarely a factor in a real design. You wouldn't use a bearing as big as the one in the video unless you had thousands of pounds of radial force, in which case it's the rolling friction that dominates. (Rolling friction is due to the balls compressing as they roll).

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Nos círculos dele

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Christian Vogel

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Frank Haubenschild compartilhou originalmente com Twitterperlen 🐦:

Momentaufnahme, wie eine Sternwarte einen Stern einfängt um einen Stern zu warten. #sternetüv

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js on Twitter: "Momentaufnahme, wie eine Sternwarte einen Stern einfängt um einen Stern zu warten. #sternetüv "

twitter.com

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Johannes Thumshirn

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Warum muss ich jetzt an Pacman denken?

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Christian Vogel

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Owlfred NightLong compartilhou originalmente:

Fotos de Owlfred NightLong

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Christian Vogel

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Martin Vogel compartilhou originalmente:

Bochum: 41° im Schatten gemessen!

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Fotos do Martin Vogel

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Christian Vogel

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The winner of the 2014 underhanded c contest is pretty impressive...

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The Underhanded C Contest

underhanded-c.org

6.01.15. 2014 Winners. Posted in Uncategorized at 7:17 pm by XcottCraver. Winners of the 7th Underhanded C Contest are now online. The goal of the Underhanded C contest is to write code that is as readable, clear, innocent and straightforward as possible, and yet it must fail to perform at its ...

Johannes Thumshirn

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Didn't know about the contest, but pretty cool, indeed

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Christian Vogel

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http://www.righto.com/2015/05/bitcoin-mining-on-55-year-old-ibm-1401.html

Bitcoin mining on a 55 year old IBM 1401 mainframe: 80 seconds per hash

righto.com

Could a IBM mainframe from the 1960s mine Bitcoin? The idea seemed crazy, so I decided to find out. I implemented the Bitcoin hash algorithm in assembly code for the IBM 1401 and tested it on a working vintage mainframe. It t...

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Christian Vogel

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Sascha Pallenberg compartilhou originalmente:

Warum wir eine richtige Flatrate fuer mobile Plattformen brauchen
Ich denke diese kleine Statistik zeigt ganz wunderbar wo wir in Deutschland stehen. Achtung... die Tarife haben min. 1000 Gespraechsminuten und eine SMS-Flat.
Dennoch macht es meinen Rant noetiger denn je...
http://www.mobilegeeks.de/artikel/schluss-mit-dem-etikettenschwindel-wir-brauchen-eine-richtige-flatrate/

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