Benjamin Weiß

Dennis Guse, Oliver Hohlfeld, Anna Wunderlich et al.

QoE is traditionally evaluated by using short stimuli usually representing parts or single usage episodes. This opens the question on how the overall service perception involving multiple} usage episodes can be evaluated---a question of high practical relevance to service operators. Despite initial research on this challenging aspect of multi-episodic perceived quality, the question of the underlying quality formation processes and its factors are still to be discovered. We present a multi-episodic experiment of an Audio on Demand service over a usage period of 6~days with 93 participants. Our work directly extends prior work investigating the impact of time between usage episodes. The results show similar effects---also the recency effect is not statistically significant. In addition, we extend prediction of multi-episodic judgments by accounting for the observed saturation.

Felix Schmitt, Ralf Heidger, Stephen Straub et al.

SESAR is supposed to boost the development of new operational procedures together with the supporting systems in order to modernize the pan-European air traffic management (ATM). One consequence of this development is that more and more information is presented to - and has to be processed by - air traffic control officers (ATCOs). Thus, there is a strong need for a software design concept that fosters the development of an advanced (tower) controller working position (A-CWP) that comprehensively integrates the still counting amount of information while reducing the data management workload of ATCOs. We report on our first hands-on experiences obtained during the development of an A-CWP prototype that was used in two SESAR validation sessions.