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This paper reviews the state of the art in the display and perception of walking generated sounds and tactile vibrations, and their current and potential future uses in interactive systems. As non-visual information sources that are closely linked to human activities in diverse environments, such signals are capable of communicating about the spaces we(More)
A shoe-based interface is presented, which enables users to play percussive virtual instruments by tapping their feet. The wearable interface consists of a pair of sandals equipped with four force sensors and four actuators affording audio-tactile feedback. The sensors provide data via wireless transmission to a host computer, where they are processed and(More)
We present a floor tile designed to provide the impression of walking on different ground materials, such as gravel, carpet, or stone. The device uses affordable and commercially available vibrotactile actua-tors and force sensors, and as such might one day be cost-effectively used in everyday environments. The control software is based on a lumped model of(More)
—Waveguide meshes are efficient and versatile models of wave propagation along a multidimensional ideal medium. The choice of the mesh geometry affects both the computational cost and the accuracy of simulations. In this paper, we focus on two-dimensional (2-D) geometries and use multidimensional sampling theory to compare the square, triangular, and(More)
Some computational aspects and behavioral patterns of P systems are considered, emphasizing dynamical properties that turn useful in characterizing the behavior of biological and biochemical systems. A framework called state transition dynamics is outlined in which general dynamical concepts are formulated in completely discrete terms. A metabolic algorithm(More)