Prevent Opening Additional Popover View from Navigation Bar Button Using UIPopoverController

In a recent iOS project for the iPad, I wanted to open a popover view from a bar button in the navigation bar. However, tapping somewhere on the navigation bar would not dismiss the popover view but (depending on where I tapped on the bar) open an additional popover view or even navigate to another view controller.
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Creating Animated GIFs from the Command Line in Mac OS X Using Convert

You can easily create animated GIFs from the command line in Mac OS X (or Linux) using ImageMagick. To figure out if ImageMagick is installed open the application Terminal from the Utilities folder in Applications, type ‘convert’ and hit ‘Enter’. If something like »Version: ImageMagick 6.6.9-3 2011-04-04 Q16« and lots of options appear, ImageMagick is installed and you can proceed. If not, you can install it using MacPorts (look for ‘Mac OS X Binary Release’). install it using homebrew or MacPorts.
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SimProj: A Tool for the Calculation of Rear-Projection Mirroring

The SimProj Project provides a Processing-based (and therefore Java-based) application that provides a GUI for the simulated calculation of a video projection setup. SimProj allows to add and manipulate virtual projectors, mirrors and projection planes in order to show how the projection is mirrored and which sizes, angles and positions the setup components require. SimProj can be configured to comfortably show all necessary measures that can be ‘easily’ (everyone who has ever built a rear-projection setup knows what ‘easily’ means in that context) transferred to the hardware setup.

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SecuVa – A Collaborative Gesture Framework Supporting Tabletop User Interfaces

In the course of his Master thesis at the Hochschule RheinMain, Tim Hofmann researched the possibilities of collaborative gestures on tabletop user interfaces. I supervised his thesis and am really impressed what Tim has created.

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A Few HCI International 2013 Impressions

Currently, I am attending the conference HCI International 2013 to present the EMIL paper by our research group. HCI International is a conference on human factors similar to CHI and it is huge with 1666 accepted papers and 264 parallel sessions. The conference takes place at The Mirage in Las Vegas, which adequately is a huge place.
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A 3D-Printable Set of Tangible Objects

At the Hochschule RheinMain, we experiment with tangible user interfaces (TUI) a lot. We are especially interested in improving the authoring process of TUIs. On one hand of the creation process is the software issue how the interaction and the user interfaces can be designed and developed. However, on the other hand, there stands the problem, how the actual physical tangible objects have to look like and how they can be created. Continue reading “A 3D-Printable Set of Tangible Objects”

R.I.P. Douglas Engelbart

Recently Douglas Engelbart passed away. He is popular for his human-computer interaction research and famous for a demo session which has been named »The Mother of all Demos« on December 9, 1968. In this demo session he introduced the computer mouse, hypermedia (which lead to HTML) and word processing (plus many other techniques). Watch the video above to see the demo.

I love the Dr. Strangelove-ish spirit of it. If you do not want to watch the whole demo, just put on headphones, switch to another task and enjoy Engelbart’s soothing voice.

[Update:] I think this quote endorses the last point I made: »Ken Kesey who, having received a demo of Engelbart’s NLS (the oNLine System) said, awed, “It’s the next thing after acid.”«