Kolja Lubitz

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Mobile devices are already an important platform for digital games. These devices need specialized input metaphors as they have various restrictions such as their own hardware capabilities and the lack of external input devices. Especially challenging are fast paced interactions as in Jump and Run games. This paper explores three user inputs for Jump and(More)
Experimental and theoretical investigations of the electromechanical anisotropy of ceramics modified with Ca, Ni-Nb, and Mn are presented. It is demonstrated that the large anisotropy of these ceramics is neither a bulk property of the PbTiO(3)-crystallites nor a domain wall effect. The anisotropy is caused by the statistical orientation of the crystallites(More)
During the cofiring of PZT actuators, interactions between electrodes and ceramics occur that induce a degradation in the large signal piezoelectric properties for ceramic layer thicknesses below 50 /spl mu/m. It has been shown that the clamping forces applied to the ceramics due to thermal mismatch between the electrode and the ceramics are responsible for(More)
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