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In this paper, we explore body language in mobile phones as a means of relational interaction. We describe a prototype that allows the simulation of proxemic reactions to the nearing hand of a user, ranging from affection to aversion, based on nearness-based input and shape change-based output. A user study is reported, which indicates that users were able(More)
This paper compares two novel physical information displays, both of which allow for haptic, non-invasive, non-audiovisual information display: a shape-changing device and a weight-shifting device. As for their suitability in mobile navigation applications, the two haptic systems are compared against each other, and also against a GUI-based solution, which(More)
In this paper, a novel means of status display in mobile phones is discussed: A permanent tactile heartbeat-like pulsation of the phone. In the study presented, this pulse was used to let the phone continuously communicate a calm state of 'Everything is okay.' – then, this pulse was suddenly interrupted, as soon as the phone needed the user's attention. We(More)
In this paper, we present a novel type of persuasive home appliance: A thrifty water faucet. Through a servo motor construction, it is enabled to move and behave in life-like manners and to step into dialogue with the user. For example about water consumption or hygiene. We sought to research the reactions of users to such an appliance, alongside possible(More)
This paper presents a novel haptic actuation system for mobile phones: Two-dimensional tapering through an actuated back plate. It proposes this type of shape-change for various applications, e.g. for ergonomically actuating the shape itself, displaying internal contents, and pointing to entities located outside the device. The paper reports a user study(More)
In this paper, we introduce the change of a mobile phone's hardware shape as a means of tactile interaction. The alteration of shape is implemented in a hardware prototype using a dynamic knob as an interaction device for the user. The knob alters the phone's shape according to different events and states, like incoming calls, new voice mail, or missed(More)
In this paper, we present a new shape-based display technique for mobile phones: A rotatory deformation of the phone's chassis, resulting in a tapering between the phone's front and back panel. It draws on proprioceptive skills of the human hand, which we hypothesize to be sensitive to paralellism and tapering of two opposing panels. We present a number of(More)
In this paper, we explore how direct physical cues of interpersonal nearness can be achieved in mobile phones. Exemplarily, we present three novel means of communication for mobile phones: grasping, kissing and whispering. Reviewing the related work, we point to a research gap in direct physical near-body actuation in mobile telecommunication. To assess(More)
In this paper, we present a novel type of haptic display for usage in mobile phones. It changes the gravitational properties of the device by shifting an internal weight along two axes. Its utility is explored in a performance study, in which users were estimating positions of the device's actuated center of gravity. The users also participated in(More)