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Context-sensing for context-aware HCI challenges the traditional sensor fusion methods with dynamic sensor configuration and measurement requirements commensurate with human perception. The Dempster-Shafer theory of evidence has uncertainty management and inference mechanisms analogous to our human reasoning process. Our Sensor Fusion for Contextaware(More)
The sound of a working vehicle provides an important clue to the vehicle type. In this paper, we introduce the “eigenfaces method,” originally used in human face recognition, to model the sound frequency distribution features. We show that it can be a simple and reliable acoustic identification method if the training samples can be properly chosen and(More)
In the “coin tap test,” an operator taps with a coin-like light tool on the structure to be inspected, feeling the subtle difference of impact force and hearing the resulting sound to discriminate defective regions from normal ones. The test remains largely subjective, and there has been considerable uncertainty about the physical principles behind it.(More)
To answer the challenge of context-understanding for HCI, we propose and test experimentally a top-down sensor fusion approach. We seek to systematize the sensing process in two steps: first, decompose relevant context information in such a way that it can be described in a model of discrete facts and quantitative measurements; second, we build a(More)
1 Huadong Wu is the recipient of a Motorola Partnerships in Research Grant Abstract Context sensing for context-aware HCI challenges traditional sensor fusion methods with its requirements for (1) adaptability to a constantly changing sensor suite and (2) sensing quality commensurate with human perception. We build this paper on two IMTC2002 papers, where(More)
A texture characterization method has been explored to model the visual appearance of paintings, before and after a surface treatment. A preliminary experiment has been conducted to test the texture feature vectors before and after varnishing with Grumbacher’s Picture Varnish liquid. Numerical functions, such as level of harmony (energy) and level of(More)
Online monitoring of power transformers which supports established diagnosis methods gains importance. Continuous measurement using trend analysis allows the detection and tracing of undesirable changes at an early state. For partial discharges (PD), ultra-high frequency monitoring represents an advantageous technique. The used measurement inside a tank is(More)
We present a novel and relatively simple method for magnifying forces perceived by an operator using a tool. A sensor measures the force between the tip of a tool and its handle held by the operator’s fingers. These measurements are used to create a proportionally greater force between the handle and a brace attached to the operator’s hand, providing an(More)