Zu finden übrigens auf dem sehr empfehlenswerten Sampler Trojan Soulful Reggae.

The symptoms were the following: After successfully installing Redmine and Git using some nice instructions I found on a blog, I had permanent problems using the git push command:

$ git push
Username: 
Password: 
Fetching remote heads...
  refs/
  refs/heads/
  refs/tags/
updating 'refs/heads/master'
  from a698d7bfbd2147cc8ba850aefab63f9591e1e395
  to   fa8dd4f3454c72525061d4a94c93ee547f682f69
    sending 3 objects
MKCOL 148cad6c4de87c7cca4265293b238e9b738cd398 failed, aborting (22/401)
MKCOL fa8dd4f3454c72525061d4a94c93ee547f682f69 failed, aborting (22/401)
Updating remote server info
fatal: git-http-push failed

The strange thing was, that I always had to execute git push exactly three times, then it worked. After examination of the HTTP output produced with the command GIT_CURL_VERBOSE=1 git push, I noticed that Git sends the HTTP authentication stuff only for the first MKCOL WebDav command, not for the follwing two. Therefore it was necessary to execute the command three times. However, the solution to the problem was to create a .netrc-file in the $HOME-directory and provide it with the needed login:

machine <servername>
login <username>
password <password>

Now the authentication information gets always passed to the server and therefore the MKCOL commands are successfully executed.

Update: Another problem I just encountered was when uploading large files, it might occur that the DAV lock timeout mechanism might cause another "git-http-push failed" error:

git-http-push failed 412 unable to refresh lock

The solution is to increase the timeout in your Apache configuration:

# set minimum timeout to 1h:
DavMinTimeout 3600

Eine Instanz in Sachen verquerer, jazziger Russenrock ist auf jeden Fall die St. Peteresburger Band Auktyon (Аукцыон) um Leonid Fyodorov, die schon seit Anfang der 80er ihre eigenwillige Melange aus Progrock, Folk und jazzigen Bläsern spielt. Höhepunkt ist für mich das Album Ptica von dem es zum Glück auch ein paar Stücke auf YouTube gibt, mitsamt verstörender Musikclips. Als erstes das hypnotische Maya Lyubov:

Der Clip von Doroga ist nicht weniger verstörend:

In eine ähnliche Richtung geht auch Ne Zhdali (Не Ждали), die Ende der 80er in der musikalischen Untergrundszene Estlands begannen und nach Zusammenbruch des Ostblocks in den Niederlanden und danach in Deutschland eine neue Heimat fanden. Der Mix aus Punk, Jazz, traditionell osteuropäischer Musik und ich will es mal "Chaos" nennen, ist hierbei meist unzugänglicher als die Musik z.B. von Auktyon und stellenweise ziemlich anstrengend. Dennoch finden sich einige Perlen wie z.B. Air - Ground:

Der Bandleader von Ne Zhdali, Leonid Soybelman, hat in allerlei Bands gespielt und empfehlenswert ist hierbei unter anderem der Yiddisch-Folk-Jazz-Mix von Kletka Red, hier mit dem Video von Kosiak Lyubvie:

Wenn auch nicht so "Avantgarde" wie die bisher vorgestellten Bands, passt die tatarisch-russisch-australische (!) Sängerin Zulya Kamalova doch ganz gut als Anschluss:

Zu guter letzt sei noch auf Fusedmarc aus Litauen hingewiesen, die v.a. live ein absolutes Erlebnis sind. Die Kombination aus kraftvoller, an Björk erinnernden Stimme, treibender Beats und bizarrer Videoperformance hat mich auf meinem ersten Sziget-Festival (ich glaube es war 2005) fasziniert.

Solche und ähnliche Entdeckungen lassen sich übrigens im Panda Theater Berlin machen, eine der wenigen guten Adressen in der Kulturbrauerei...

The LBG-algorithm allows clustering of vectors of any dimension. This is helpful for example for image classification when using the SIFT or SURF algorithms. It might be also useful if you want to cluster a large amount of points on a map.

The mobile museum visits schools all over Germany and features a full exhibition that fits into a van when it is packed. Once it is set up in the school yard, a exhibition is unfolded with four different thematic "islands". Additionally there are workshops in the classrooms where the children can immerse into six different interactive diaries of Jewish children and learn about their lives and believes. A video in German gives an overview about the project:

The project team in our research group was responsible to develop the interactive modules of the exhibition and the interactive diaries which were realized as iPad applications using cocos2D. The software base is planned to be released under an Open Source license.

We will present our results on the forthcoming Culture and Computer Science Conference next week in the Pergamon Museum, Berlin.

• Open a terminal on Linux or Mac OSX.
• Copy & paste the following line:

clear; echo -en "\033[1;37m\033[40m"; while [ true ]; do i=0; echo; while [ $i -lt 80 ]; do i=`expr $i + 1`; if [ $RANDOM -gt 32000 ]; then echo -n "*"; else echo -n " "; fi; done; done;

• Press Enter.

Got enough? Press CTRL-C and type echo -e "\033[0m"; to reset the colors to black on white.

Merry Christmas!

Die neue Webseite ist bewusst minimalistisch gehalten. Mir ging es vor allem darum, das Einpflegen von neuem Inhalt einfacher zu gestalten, deswegen habe ich die neue Webseite auf Basis eines Wikis realisiert, nämlich PmWiki und es mit allerlei frei verfügbaren sowie selbst geschriebenen Cookbooks zu einem kleinen CMS umgebaut.

Wenn ich mal mehr Zeit habe werde ich die Inhalte auch noch auf englisch anbieten, der Grundstein dafür ist schon gelegt, PmWiki ist multilingual und ich bin es in begrenztem Maße zum Glück auch...

Read more on the dedicated page and/or download the PDF.

The covered libraries are:

• CoreAudio
• LibPd
• MoMu/Synthesis ToolKit
• CocosDenshion

Some examples on how to use them are also given. The paper can be a good starting point for audio synthesis on the iOS platform.

You can download it here:

• Paper as PDF and all example XCode projects
• Only the PDF

• Download the patch from https://github.com/xemus/cocos2d-GestureRecognizers/archives/master
• Apply the patch using the Terminal:

cd <path-to-project>/libs/cocos2d 
patch -p1 -i cocos2d.patch

• You might get an error, saying Hunk #3 FAILED at 269. The solution is to go to line 276 of the file CCNode.m and add the following lines:

#ifdef __IPHONE_OS_VERSION_MAX_ALLOWED 
        // lazy allocation 
        gestureRecognizers_ = nil; 
        isTouchEnabled_ = NO; 
#endif

• Don't forget to add the files CCGestureRecognizer.h/.m to your XCode-Project, so that they will be compiled

That's all you need to get it running. Now you can use a new class named CCGestureRecognizer in your App like that:

// create a CCGestureRecognizer for rotation-gesture
CCGestureRecognizer* recognizer;
recognizer = [CCGestureRecognizer CCRecognizerWithRecognizerTargetAction:[[[UIRotationGestureRecognizer alloc]init] autorelease]    // use rotation recognizer
    target:self  // callback object -> this object gets called when there is rotation gesture
    action:@selector(rotateGesture:node:)];   // callback method -> rotateGesture:node: gets called when there is rotation gesture
[self addGestureRecognizer:recognizer]; // register the gesture recognizer

// create a CCGestureRecognizer for pinch-gesture
recognizer = [CCGestureRecognizer CCRecognizerWithRecognizerTargetAction:[[[UIPinchGestureRecognizer alloc]init] autorelease]    // use rotation recognizer
    target:self // callback object
    action:@selector(pinchGesture:node:)];  // callback method
[self addGestureRecognizer:recognizer]; // register the gesture recognizer

Implement your callback-methods that will receive the gesture-events. This sample codes will change the rotation and scale of a sprite.

// This method is called upon recognizing a gesture by the UIRotationGestureRecognizer
- (void)rotateGesture:(UIRotationGestureRecognizer *)recognizer node:(CCNode *)node {
    // get the rotation from the recognizer, convert it into degrees and set it to the sprite's rotation
    sprite.rotation = CC_RADIANS_TO_DEGREES([recognizer rotation]);
}

// This method is called upon recognizing a gesture by the UIPinchGestureRecognizer
- (void)pinchGesture:(UIPinchGestureRecognizer *)recognizer node:(CCNode *)node {
    // get the scale from the recognizer
    sprite.scale = [recognizer scale];
}

You can download a full documented sample-project and have a look in the TouchLayer.m file: Cocos2DTouch.zip