Integrated RFID readers are appearing in mobile phones, enabling the selection of tags and communication with physical objects in a user-friendly way by touching. The authors have built a system that emulates UHF tags and supports other physical selection paradigms in addition to touching: pointing by IR or visual light, and scanning of nearby tags. The emulator is based on RF communication and sensing units, SoapBoxes. The emulator is used to study the feasibility and usability of different selection paradigms in the context of physical browsing. This paper introduces a tag reader system emulator, which expands the selection concept from touching to pointing and scanning of nearby tags.
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