Current pervasive games are mostly locationaware applications, played on handheld computing devices. Considering pervasive games for children, it is argued that the interaction paradigm existing games support limits essential aspects of outdoor play like spontaneous social interaction, physical movement, and rich face-to-face communication. We present a new genre of pervasive games conceived to address this problem, that we call ''Head Up Games'' (HUGs) to underline that they liberate players from facing down to attend to screen-based interactions. The article discusses characteristics of HUG and relates them to existing genres of pervasive games. We present lessons learned during the design and evaluation of three HUG and chart future challenges.
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Contemporary lighting systems may consist of many individual light sources that can be controlled on various parameters (e.g. intensity, color, spatial position). Therefore, opening up freedom of control to the user in a comprehensive manner is a challenge. We present a lighting system with three different interfaces that suit different usage scenarios in terms of control effort and freedom. The system consists of modular ceiling tiles ( fig. 1) for down-lighting and colored wallwashing for atmospheric lighting. The LightPad ( fig. 2a) allows people to quickly adjust all light sources with an expressive touch; duration and force determine respectively the light color and intensity. This could be used near the entrance of a space to quickly set the lighting. The LightCube ( fig. 2b) allows users to choose between various presets that are related to different activities. The top-facing preset is activated. The LightApp ( fig. 2c/d) is a tablet interface that allows users to control many light sources in detail using simple gestures: dragging, pinching, rotating and wiping. This could be used to create specific atmospheres, or to create presets for the LightCube. { r.magielse, s.a.m.offermans @tue.nl } fig 2. The interfaces; a) LightPad, b) LightCube, c/d) LightApp fig 1. The modular ceiling Video Showcase CHI 2013: Changing Perspectives,
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