Auflistung nach Autor:in "Rohs, Michael"
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- ZeitschriftenartikelEnvironZen: Immersive Soundscapes via Augmented Footstep Sounds in Urban Areas(i-com: Vol. 21, No. 2, 2022) Schrapel, Maximilian; Happe, Janko; Rohs, MichaelUrban environments are often characterized by loud and annoying sounds. Noise-cancelling headphones can suppress negative influences and superimpose the acoustic environment with audio-augmented realities (AAR). So far, AAR exhibited limited interactivity, e. g., being influenced by the location of the listener. In this paper we explore the superimposition of synchronized, augmented footstep sounds in urban AAR environments with noise-cancelling headphones. In an online survey, participants rated different soundscapes and sound augmentations. This served as a basis for selecting and designing soundscapes and augmentations for a subsequent in-situ field study in an urban environment with 16 participants. We found that the synchronous footstep feedback of our application EnvironZen contributes to creating a relaxing and immersive soundscape. Furthermore, we found that slightly delaying footstep feedback can be used to slow down walking and that particular footstep sounds can serve as intuitive navigation cues.
- KonferenzbeitragA GPS Tracking Application with a Tilt- and Motion- Sensing Interface(INFORMATIK 2008. Beherrschbare Systeme – dank Informatik. Band 1, 2008) Mock, Michael; Rohs, MichaelCombining GPS tracks with semantic annotations is the basis for large data analysis tasks that give insight into the movement behavior of populations. In this paper, we present a first prototype implementation of a GPS tracking application that aims at subsuming GPS tracking and manual annotation on a standard mobile phone. The main purpose of this prototype is to investigate its usability, which is achieved by a tilt- and motion-sensing interface. We provide a GPS diary function that visualizes GPS trajectories on a map, allows annotating the trajectory, and navigating through the trajectory by moving and tilting the mobile phone. We present the design of our application and report on the very first user experiences.
- KonferenzbeitragMobile and embedded interactive systems(Informatik 2009 – Im Focus das Leben, 2009) Rohs, Michael; Holleis, Paul; Kranz, Matthias; Hußmann, Heinrich; Lukowicz, Paul
- KonferenzbeitragMobile and Embedded Interactive Systems (MEIS’08)(INFORMATIK 2008. Beherrschbare Systeme – dank Informatik. Band 1, 2008) Rohs, Michael; Holleis, Paul; Kranz, Matthias; Hußmann, Heinrich
- KonferenzbeitragMobile and Embedded Interactive Systems (MEIS’09)(Informatik 2009 – Im Focus das Leben, 2009) Rohs, Michael; Holleis, Paul; Kranz, Matthias; Hußmann, Heinrich; Lukowicz, Paul
- KonferenzbeitragNavigating Dynamically-Generated High Quality Maps on Tilt-Sensing Mobile Devices(INFORMATIK 2008. Beherrschbare Systeme – dank Informatik. Band 1, 2008) Kratz, Sven; Rohs, MichaelOn mobile devices, navigating in high-resolution and high-density 2D information spaces, such as geographic maps, is a common and important task. In order to support this task, we expand on work done in the areas of tilt-based browsing on mobile devices and speed-dependent automatic zooming in the traditional desktop en- vironment to create an efficient interface for browsing high-volume map data at a wide range of scales. We also discuss infrastructure aspects, such as streaming 2D content to the device and efficiently rendering it on the display, using standards such as Scalable Vector Graphics (SVG).
- KonferenzbeitragSign H3re: Symbol and X-Mark Writer Identification Using Audio and Motion Data from a Digital Pen(Mensch und Computer 2022 - Tagungsband, 2022) Schrapel, Maximilian; Grannemann, Dennis; Rohs, MichaelAlthough in many cases contracts can be made or ended digitally, laws require handwritten signatures in certain cases. Forgeries are a major challenge with digital contracts, as their validity is not always immediately apparent without forensic methods. Illiteracy or disabilities may result in a person being unable to write their full name. In this case x-mark signatures are used, which require a witness for validity. In cases of suspected fraud, the relationship of the witnesses must be questioned, which involves a great amount of effort. In this paper we use audio and motion data from a digital pen to identify users via handwritten symbols. We evaluated the performance our approach for 19 symbols in a study with 30 participants. We found that x-marks offer fewer individual features than other symbols like arrows or circles. By training on three samples and averaging three predictions we reach a mean F1-score of F 1 = 0.87, using statistical and spectral features fed into SVMs
- TextdokumentSpecial Issue on Mobile and Wearable Interaction(i-com: Vol. 21, No. 2, 2022) Rohs, Michael; Echtler, Florian