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Perceived travel time in public transport trip directly affects passengers’ satisfaction and therefore is an essential consideration when planning and operating the public transport system. However, beyond the prevalent analysis on the waiting time perception, there are few articles that have studied the travel time perception along the entire multimodal trip. In this context, this paper presents...
When manually testing Web sites humans can go with vague, yet general instructions, such as "add the product to shopping cart and proceed to checkout". Can we teach a robot to follow such instructions as well?In this paper I present a novel model, called semantic usage patterns which allows us to capture the general topics behind the individual steps of interactions. These models can be...
When interacting with user interfaces, do users always get what they expect? For each user interface element in thousands of Android apps, we extracted the Android APIs they invoke as well as the text shown on their screen. This association allows us to detect outliers: User interface elements whose text, context or icon suggests one action, but which actually are tied to other actions. In our evaluation...
When analyzing version histories, researchers traditionally focused on single events: e.g. the change that causes a bug, the fix that resolves an issue. Sometimes however, there are indirect effects that count: Changing a module may lead to plenty of follow-up modifications in other places, making the initial change having an impact on those later changes. To this end, we group changes into change...
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