Publication statistics

Pub. period:2009-2011
Pub. count:4
Number of co-authors:4


Number of publications with 3 favourite co-authors:

Florian Heller:
Moritz Wittenhagen:
Jan Borchers:



Productive colleagues

Leonhard Lichtschlag's 3 most productive colleagues in number of publications:

Jan Borchers:38
Thorsten Karrer:13
Florian Heller:5

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Leonhard Lichtschlag


Publications by Leonhard Lichtschlag (bibliography)

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Karrer, Thorsten, Wittenhagen, Moritz, Lichtschlag, Leonhard, Heller, Florian and Borchers, Jan (2011): Pinstripe: eyes-free continuous input on interactive clothing. In: Proceedings of ACM CHI 2011 Conference on Human Factors in Computing Systems 2011. pp. 1313-1322.

We present Pinstripe, a textile user interface element for eyes-free, continuous value input on smart garments that uses pinching and rolling a piece of cloth between your fingers. The input granularity can be controlled in a natural way by varying the amount of cloth pinched. Pinstripe input elements physically consist of fields of parallel conductive lines sewn onto the fabric. This way, they can be invisible, and can be included across large areas of a garment. Pinstripe also addresses several problems previously identified in the placement and operation of textile UI elements on smart clothing. Two user studies evaluate ideal placement and orientation of Pinstripe elements on the users' garments as well as acceptance and perceived ease of use of this novel textile input technique.

© All rights reserved Karrer et al. and/or their publisher

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Heller, Florian, Lichtschlag, Leonhard, Wittenhagen, Moritz, Karrer, Thorsten and Borchers, Jan (2011): Me hates this: exploring different levels of user feedback for (usability) bug reporting. In: Proceedings of ACM CHI 2011 Conference on Human Factors in Computing Systems 2011. pp. 1357-1362.

User feedback for deployed software systems ranges from simple one-bit-feedback to full-blown bug reports. While detailed bug reports are very helpful for the developers to track down problems, the expertise and commitment required from the user is high. We analyzed existing user report systems and propose a flexible and independent hard- and software architecture to collect user feedback. We report our results from a preliminary two-week user study testing the system in the field and discuss challenges and solutions for the collection of multiple levels of user feedback through different modalities.

© All rights reserved Heller et al. and/or their publisher

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Lichtschlag, Leonhard and Borchers, Jan (2010): CodeGraffiti: communication by sketching for pair programmers. In: Proceedings of the 2010 ACM Symposium on User Interface Software and Technology 2010. pp. 439-440.

In pair programming, two software developers work on their code together in front of a single workstation, one typing, the other commenting. This frequently involves pointing to code on the screen, annotating it verbally, or sketching on paper or a nearby whiteboard, little of which is captured in the source code for later reference. CodeGraffiti lets pair programmers simultaneously write their code, and annotate it with ephemeral and persistent sketches on screen using touch or pen input. We integrated CodeGraffiti into the Xcode software development environment, to study how these techniques may improve the pair programming workflow.

© All rights reserved Lichtschlag and Borchers and/or their publisher

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Lichtschlag, Leonhard, Karrer, Thorsten and Borchers, Jan (2009): Fly: a tool to author planar presentations. In: Proceedings of ACM CHI 2009 Conference on Human Factors in Computing Systems 2009. pp. 547-556.

Modern presentation software is still built around interaction metaphors adapted from traditional slide projectors. We provide an analysis of the problems in this application genre that presentation authors face and present Fly, a presentation tool that is based on the idea of planar information structures. Inspired by the natural human thought processes of data chunking, association, and spatial memory, Fly explores authoring of presentation documents. Evaluation of a paper prototype showed that the planar UI is easily grasped by users, and leads to presentations more closely resembling the information structure of the original content, thus providing better authoring support than the slide metaphor. Our software prototype confirmed these results, and outperformed PowerPoint in a second study for tasks such as prototyping presentations and generating meaningful overviews. Users reported that this interface helped them better to express their concepts, and expressed significant preference for Fly over the traditional slide model.

© All rights reserved Lichtschlag et al. and/or ACM Press

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