Frederik Wiehr

Deutsches Forschungszentrum für Künstliche Intelligenz | DFKI · Ubiquitous Media Technologies Lab

The question of how cyber-physical systems should interact with human partners that can take over control or exert oversight is becoming more pressing, as these systems are deployed for an ever larger range of tasks. Drawing on the literatures on handing over control during semi-autonomous driving and human-robot interaction, we propose a design of...

Ontologies provide the logical underpinning for the Semantic Web, but their consequences can sometimes be surprising and must be explained to users. A promising kind of explanations are proofs generated via automated reasoning. We report about a series of studies with the purpose of exploring how to explain such formal logical proofs to humans. We...

For mixed-initiative control between cyber-physical systems (CPS) and its users, it is still an open question how machines can safely hand over control to humans. In this work, we propose a concept to provide technological support that uses formal methods from AI -- description logic (DL) and automated planning -- to predict more reliably when a ha...

In this paper, we investigate the link between machine perception and human perception for highly/fully automated driving. We compare the classification results of a camera-based frame-by-frame semantic segmentation model (Machine) with a well-established visual saliency model (Human) on the Cityscapes dataset. The results show that Machine classif...

Today, ambitious amateur athletes often do not have access to professional coaching but still invest great effort in becoming faster runners. Apart from a pure increase in the quantitative training load, a change of the running technique, e.g. transitioning from heel striking to mid-/forefoot running, can be highly effective and usually prevents kn...

Rock climbing involves complex movements and therefore requires guidance when acquiring a new technique. The classic approach is mimicking the movements of a more experienced climber. However, the trainee has to remember every nuance of the climb, since the sequence of movements cannot be performed in parallel to the experienced climber. As a solut...

Tangible User Interfaces (TUIs) allow for effective and easy interaction with digital information by encapsulating them into a physical form. Especially in combination with interactive surfaces, TUIs have been studied in a variety of forms and application cases. By taking advantage of the human abilities to grasp and manipulate they ease collaborat...

Mobile and wearable computing has great potential to support alpine outdoor sport activities. This includes, but is not limited to, rock climbing, hiking, mountain biking, paragliding, and skiing. Interestingly, technology for tracking, monitoring and supporting sport activities is broadly used in sports like running or cycling, but has not reached...

The human's visual attention focus usually reflects the activity and environment engaged in or simply his context in the most coherent way. The cornea, which is encasing the iris and pupil, is protected by tear fluid, and thus is a highly reflective surface. Our eyes show a reflection of what we see in our current context. We present an attempt of...

Most outdoor activities, such as alpine climbing, cycling, or hiking, require a careful route planning in advance. Today, most routing applications are single-user desktop applications. Furthermore, it is good practice to be able to do paper map based navigation during the trip as a backup. In this work, we propose ARTopos, a concept and implementa...

In this demo, we present our FootStriker prototype in companion to the full paper. FootStriker detects heel striking while running with a pressure-sensitive insole and corrects the striking in real-time to mid-/forefoot running by applying electrical muscle stimulation (EMS) on one of the calf muscles. The device will be worn and demonstrated by th...

Wearable sports technology such as fitness trackers or smart watches has become ubiquitous in our everyday lives, resulting in a vast collection of recorded routes. This technology now enables new forms of tracking and sharing outdoor adventures, that go beyond prosaic descriptions and photographs of the tour. Existing web mapping services and onli...

In this paper we present an interactive slackline assistant which features a life-size projection, skeleton tracking and real-time feedback. As in other sports, proper training leads to a faster buildup of skill and lessens the risk for injuries. We chose a set of exercises from slackline literature and implemented an interactive trainer which guid...

Today, ambitioned amateur athletes often do not have access to professional coaching but still invest great effort in becoming faster runners. Apart from a pure increase in the quantitative training load, a change of the running technique, e.g. transitioning from heel striking to fore- or midfoot running, can be highly effective and usually prevent...

While it has been well established that incorporating landmarks into route descriptions enhances understanding and performance of wayfinding, only a very few available systems make use of them. This is primarily due to the fact that landmark data is often not available, and the creation of the data is connected to tedious manual labor. Prior work e...

In running, knee-related injuries are very common. The main cause are high impact forces when striking the ground with the heel first. Mid- or forefoot running is generally known to reduce impact loads and to be a more efficient running style. In this paper, we introduce a wearable running assistant, consisting of an electrical muscle stimulation (...

The ubiquity of heart rate monitors (HRM) has lead to a situation in which amateur athletes often autodidactly engage in online training plans. However, the relationship between the individual heart rate and the exercise intensity is subject to stronger fluctuations and is influenced by other external and internal factors. Using solely a HRM to con...

Ambient notifications can support people in their daily activities, providing courses of action and relevant information in context. A key aspect of ambient notifications is the unobtrusive provision of information, embedded into the users' environment. The number of services which are providing notifications on numerous devices, both mobile and em...

Wearable sports devices like GPS watches and heart rate monitors are ubiquitous in sports like running or road cycling and enable the users to receive real-time performance feedback. Although rock climbing is a trending sport, there are little to no consumer electronics available to support rock climbing training during exercise. In this paper, we...

In rock climbing, discussing climbing techniques with others to master a specific route and getting practical advice from more experienced climbers is an inherent part of the culture and tradition of the sport. Spatial information, such as the position of holds, as well as learning complex body postures plays a major role in this process. A typical...

Mobile and wearable computing has great potential to support alpine outdoor sport activities. This includes, but is not limited to, rock climbing, hiking, mountain biking, paraglid-ing, and skiing. Interestingly, technology for tracking, monitoring and supporting sport activities is broadly used in sports like running or cycling, but has not reache...

Automakers are increasingly providing connectivity enhancements for vehicles to download navigational data, as well as to upload sensor information to the cloud. Generally, while more data may be better, for the driver on-the-go, information needs to be displayed in a manner that can be comprehended rather quickly. One of the major problems with vi...

The increased prevalence of mobile touch screen interfaces in cars provides for new challenges in terms of optimizing safety, usability and affective response. While touch screens have certain usability benefits, the interfaces present significant visual attention demands from the driver. Suppose that you are traveling to an unfamiliar destination...