While applications for mobile devices have become extremely important in the last few years, little public information exists on application usage behavior. We describe a large-scale deployment-based research study that logged detailed from over 4,100 users of Android-powered devices. present two types results analyzing this data: basic descriptive statistics and contextual statistics. In case former, we find average session with an lasts less than minute, even though spend almost hour day...

The use of wearable devices during running has become commonplace. Although there is ongoing research on interaction techniques for while running, the effects resulting interactions natural movement patterns have received little attention so far. While previous studies pedestrians reported increased task load and reduced walking speed interacting, further restricts requires minimizing interferences, e.g. to avoid injuries maximize comfort. In this paper, we aim shed light how interacting...

Due to their mobility, drones are in principle well-suited support runners, but it is not yet clear, which services runners desire and how they would want control them. We, therefore, conducted an online survey (N=22) identify desired then asked produce gestures for those a realistic outdoor elicitation study (N=16). Our main contributions: (1) set of that from drone, such as taking picture or calling the police; (2) intuitive controlling flight actions drone functions forming square with...

Abstract. We present a web service based tool for the planning of atmospheric research flights. The provides online access to horizontal maps and vertical cross-sections numerical weather prediction data in particular allows interactive design flight route direct relation predictions. It thereby fills crucial gap set currently available tools using from models planning. A distinct feature is its lightweight, architecture, requiring only commodity hardware basic Internet connection...

The contextual relevance of a service can only be determined by the human himself. However, measure for is required context-aware delivery. In this paper, we draw attention to icon arrangement on mobile devices as new source information adaptive menus. We conducted inquiries investigate how people arrange icons grid-based menu. Our results show that context has an impact users their menus: during different activities they prefer placed at specific positions. discuss layout options menus and...

Cycling is a popular sport in which assistance devices are used for measuring heart rate, speed or cadence. Even if much more important than performance metrics, systems supporting communication within the group not available. Speech and standard hand-gestures commonly by cyclists to communicate danger propagate commands from front end of group. We propose an approach enhance chain using gesture recognition LEDs sewed into backside cyclists' shirts. studied requirements system augmenting...

In this paper we investigate interaction with a media façade that is out of reach for touch-based interaction. We describe four different applications utilize mobile devices to enable passers-by interact the façade. Each application has been designed constrained by limitations given formal regulations an editorial board (e.g. prevent traffic distractions) and aim catch attention achieve keep users engaged. Besides description design implementation application, report on initial feedback...

Sports watches are popular amongst runners but limited in terms of sensor locations (i.e., one location at the wrist). Thus, apps on watch cannot directly sense movement changes arbitrary body locations. This, turn, severely limits training support services, contextual awareness and seamless interaction mechanisms. Our approach addresses this gap connects with two strategically placed inertial measurement units (IMUs) via bluetooth low energy (BLE). prototypical app for Wear OS receives...

The use of external motion sensors with the athletes' wearables will enable new advanced applications for providing feedback on movement. We show how visual 3D-feedback based Inertial Measurement Units (IMU) is technically and conceptually feasible. Our wearable-app connects to our custom designed IMU-pods measuring legs' orientation. App then shows an animated kinematic model in 3D. study ten runners further contributes by first insights into apply natural, live-feedback supporting...

We establish global existence and uniqueness of the dynamics classical electromagnetism with extended, rigid charges fields which need not to be square integrable. also consider a modified theory where no self-interaction occurs. That our results are crucial for approaching as yet unsolved problem general Wheeler-Feynman electromagnetism, we shall address in follow up paper. conclude by discussing energy conservation without self-interaction.

Public displays are often used to broadcast large amounts of information people who pass by the displays. Flight departure boards, stock market and systems at conferences examples for this kind pervasive While such serve a number users, one key disadvantage individual users results from difficulty pinpoint which many items shown is relevant them. This paper introduces novel method address problem through visual highlighting compares it existing approaches. In doing so, we propose set...

In many countries, informed consent is required before a service provider can collect personal data from user. For location-based services (LBS), this applies in particular to location information, which enable deep inferences about person. paper, we present systematic analysis of how for the collection information obtained 40 popular LBS on each two largest app stores. Two independent raters assessed content, structure and design dialogues shown by apps obtain users. Based their assessment,...

Public displays have become ubiquitous in many places regularly visited by large numbers of people (e.g., traffic hubs or malls). In addition to advertising they often provide information related the location time tables). However, individuals can difficulties find relevant them -- either due overload lack personalization. Multiplexing, as defined theory, help address this issue increasing number available channels. We propose three methods for visual multiplexing, and report on a controlled...

While the demand for Location-based Services (LBS) is strongly increasing, technical laymen are not yet able to build and provide location-aware applications. This paper presents a radical simplification of lifecycle LBSs. An authoring toolkit enables non-technicians easily develop context-aware mobile In addition, an adaptive user interface makes consumption LBSs easier. The platform we present, in covering whole LBS supply chain, hiding complexity providing consuming from end-users.

We establish global existence and uniqueness of the dynamics classical electromagnetism with extended, rigid charges fields which need not to be square integrable. consider also a modified theory where no self-fields occur. That our results are crucial for approaching as yet unsolved problem general Wheeler Feynman electromagnetism, we shall address in follow up paper.

We study the equations of Wheeler-Feynman electrodynamics which is an action-at-a-distance theory about world-lines charges that interact through their corresponding advanced and retarded Liénard-Wiechert field terms. The are non-linear, neutral, involve time-like as well arguments unbounded delay. Using a reformulation in terms Maxwell-Lorentz without self-interaction, we have introduced preceding work, able to establish existence conditional solutions. These solutions solve on any finite...

While public displays have proliferated in many areas, passersby frequently do not perceive the contents shown as useful. One way to provide relevant content is show personalized information or let users personalize interactively. However, this approach raises privacy concerns. To gain a better understanding of these concerns, we carried out study assessing applicability an existing threat model displays. We report on key outcomes, propose extended tailored interactive displays, and...

The aether soon will be pervaded with a high density of digital services for usage on mobile phones. Personalization plays crucial role the success and acceptance such systems. In this paper, we present work in progress new approach improving personalization recommender systems pervasive services. Mobile utilization is extended from inherent devices to We describe concept collaborative content-based filtering based users' service rankings given by arrangement menu icons discuss different...

This poster presents a novel idea of how to provide users with location-based services. The key issues lie in radically simplifying the provision and utilisation Therefore we introduce Mobile Geo Widgets. Our objective is make it possible for non-technicians compose these via web toolkit without need specialized knowledge, enable people use them on their mobile phones context-aware manner any installation effort.