Schöning, Johannes
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Schöning, Johannes
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Schöning, Johannes
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Item-typ:Veröffentlichung, Beautiful...but at What Cost? An Examination of Externalities in Geographic Vehicle Routing(ACM, 2017); 240 92 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, Understanding Death by GPS : A Systematic Study of Catastrophic Incidents Associated with Personal Navigation TechnologiesCatastrophic incidents associated with GPS devices and other personal navigation technologies are sufficiently common that these incidents have been given a colloquial nickname: Death by GPS . While there is a significant body of work on the use of personal navigation technologies in everyday scenarios, no research has examined these technologies roles in catastrophic incidents. In this paper, we seek to address this gap in the literature. Borrowing techniques from public health research and communication studies, we construct a corpus of 158 detailed news reports of unique catastrophic incidents associated with personal navigation technologies. We then identify key themes in these incidents and the roles that navigation technologies played in them, e.g. missing road characteristics data contributed to over 24% of these incidents. With the goal of reducing casualties associated with personal navigation technologies, we outline implications for design and research that emerge from our results, e.g. advancing space usage rule mapping, incorporating weather information in routing, and improving visual and audio instructions in complex situations.Konferenzbeitrag519 110 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, FoldWatch: Using Origami-Inspired Paper Prototypes to Explore the Extension of Output Space in Smartwatches(2018); 261 119 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, 77 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, Large Scale Detailed Mapping of Dengue Vector Breeding Sites Using Street View Images(2019); 350 124 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, Pharos: Improving Navigation Instructions on Smartwatches by Including Global LandmarksLandmark-based navigation systems have proven benefits re- lative to traditional turn-by-turn systems that use street names and distances. However, one obstacle to the implementation of landmark-based navigation systems is the complex challenge of selecting salient local landmarks at each decision point for each user. In this paper, we present Pharos, a novel system that extends turn-by-turn navigation instructions using a single global landmark (e.g. the Eiffel Tower, the Burj Khalifa, mu- nicipal TV towers) rather than multiple, hard-to-select local landmarks. We first show that our approach is feasible in a large number of cities around the world through the use of computer vision to select global landmarks. We then present the results of a study demonstrating that by including global landmarks in navigation instructions, users navigate more con- fidently and build a more accurate mental map of the navigated area than using turn-by-turn instructions.Konferenzbeitrag332 161 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, Disabled, but at What Cost? An Examination of Wheelchair Routing AlgorithmsPlatforms like Google Maps or Bing Maps are used by a large number of users to find the shortest path to their destinations. While these services mainly focus on supporting drivers and pedestrians, first services exist that support wheelchair users. Routing algorithms for wheelchair users try to avoid obstacles like stairs or bollards and optimize on criteria like surface properties and slope of the route. In this study, we undertake the first controlled examination of wheelchair routing approaches. By analyzing three routing platforms, including two wheelchair routing algorithms and three pedestrian routing algorithms, across fifteen major cities in Germany, our results highlight that the routes for wheelchair users are significantly longer and partially also more complex than those for pedestrians. In addition, we show that today s pedestrian routing algorithms also output very diverse routes.KonferenzbeitragBand:MobileHCI294 131 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, WatchThru: Expanding Smartwatch Displays with Mid-air Visuals and Wrist-worn Augmented RealityWe introduce WatchThru, an interactive method for extended wrist-worn display on commercially-available smartwatches. To address the limited visual and interaction space, WatchThru expands the device into 3D through a transparent display. This enables novel interactions that leverage and extend smartwatch glanceability. We describe three novel interaction techniques, Pop-up Visuals, Second Perspective and Peek-through, and dis- cuss how they can complement interaction on current devices. We also describe two types of prototypes that helped us to explore standalone interactions, as well as, proof-of-concept AR interfaces using our platform.Konferenzbeitrag351 93 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, It s Time to Do Something: Mitigating the Negative Impacts of Computing Through a Change to the Peer Review Process(2018); 299 203 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, The Effect of Population and Structural Biases on Social Media-based Algorithms - A Case Study in Geolocation Inference Across the Urban-Rural SpectrumMuch research has shown that social media platforms have substantial population biases. However, very little is known about how these population biases affect the many algorithms that rely on social media data. Focusing on the case study of geolocation inference algorithms and their performance across the urban-rural spectrum, we establish that these algorithms exhibit significantly worse performance for underrepresented populations (i.e. rural users). We further establish that this finding is robust across both text- and network-based algorithm designs. However, we also show that some of this bias can be attributed to the design of algorithms themselves rather than population biases in the underlying data sources. For instance, in some cases, algorithms perform badly for rural users even when we substantially overcorrect for population biases by training exclusively on rural data. We discuss the implications of our findings for the design and study of social media-based algorithms.Konferenzbeitrag258 125