Computing the exponential of an intensity matrix

AbstractMelloy, B.J. and G.K. Bennett, Computing the exponential of an intensity matrix, Journal of Computational and Applied Mathematics 46 (1993) 405–413.A scaling and squaring procedure for computing the exponential of an intensity matrix is developed in this paper. Intensity matrices occur naturally in inventory, reliability and queueing systems. It will be seen that when these matrices are properly transformed, they are well-conditioned for the matrix exponential function, and particularly well-suited for the scaling and squaring approach. As a result, many of the reliability problems associated with the standard procedure have been circumvented

Binocular Eye Tracking in Virtual Reality for Inspection Training

(a) User interface. (b) Eye image from tracking device. (c) 3D scanpaths. Figure 1: Recording binocular eye movements in aircraft cargo bay virtual inspection environment. This paper describes the development of a binocular eye tracking Virtual Reality system for aircraft inspection training. The aesthetic appearance of the environment is driven by standard graphical techniques augmented by realistic texture maps of the physical environment. A “virtual flashlight” is provided to simulate a tool used by inspectors. The user’s gaze direction, as well as head position and orientation, are tracked to allow recording of the user’s gaze locations withi