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Fig. 1. Typical RFID tags used to label objects. The size of the tag depicted in the center is 11 × 5 cm. Abstract— In this paper we analyze whether recent Radio Frequency Identification (RFID) technology can be used to improve the localization of mobile robots and persons in their environment. In particular we study the problem of localizing RFID tags with(More)
This paper reports on the design and use of tactile user interfaces embedded within or wrapped around the devices that they control. We discuss three different interaction prototypes that we built These interfaces were embedded onto two handheld devices of dramatically different form factors. We describe the design and implementation challenges , and user(More)
Recognizing and recording activities of daily living is a significant problem in elder care. A new paradigm for ADL inferencing leverages radio-frequency-identification technology, data mining, and a probabilistic inference engine to recognize ADLs, based on the objects people use. A key aspect of pervasive computing is using computers and sensor networks(More)
The role of computers in the modern office has divided ouractivities between virtual interactions in the realm of thecomputer and physical interactions with real objects within thetraditional office infrastructure. This paper extends previous workthat has attempted to bridge this gap, to connect physical objectswith virtual representations or computational(More)
A major event in the history of human-computer interaction (HCI) was the advent at Xerox PARC in the 1970s of the Graphical User Interface (GUI). The GUI was based on a bitmapped display, making the interface to the computer primarily a visual medium, along with a pointing device (typically a mouse), enabling the user to point to parts of the display. The(More)
Recent research has explored ways to obtain and use knowledge of person-object interactions. We present a novel pair of wearables, a glove and a bracelet, that detect when users interact with unobtrusively tagged objects. The glove can also report whether the grasp was with the palm or the fingertips. Both devices have been built and deployed. We present(More)
VIDEO ABSTRACT At the CHI'94 conference we presented a new user interface tool, the Magic Lens (Tkf) filter, that combines an arbitrarily-shaped region with an operator that changes the view of objects viewed through that region. On a computer display, Magic Lens filters appear on a Toolglass sheet that can be positioned over applications, much as a(More)
A <italic>Collaborage</italic> is a collaborative collage of physically represented information on a surface that is connected with electronic information, such as a physical In/Out board connected to a people-locator database. The physical surface (board) contains items that are tracked by camera and computer vision technology. Events on the board trigger(More)