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In this paper, we present Q U A L E X , a system and algor i thm for generating first-order quali tat ive causal graphs for tutor ia l purposes based on de Kleer and Brown's qualitative modeling theory. Q U A L E X is embedded in a constructive simulation environment called Heart Works which teaches hydraulics principles about the cardio-vascular system to first year college biology students.

This paper introduces a new dynamical model which enhances the relationship between face movements and speech acoustics. Based on the autocorrelation of the acoustics and of the face movements, a causal and a non-causal filter are proposed to approximate dynamical features in the speech signals. The database consisted of sentences recorded acoustically, and by using a Qualisys system to capture...

This paper addresses some of the issues involved in modeling the domain of turbojet engine operation. A causal model based on the relationships between engine parameters has been developed and used to implement an engine simulation. The implementation includes a facility for explaining the results of the simulation.

Little is understood about the long term, indirect health consequences of drought (a period of abnormally dry weather). In particular, the implications of drought for mental health via pathways such as loss of livelihood, diminished social support, and rupture of place bonds have not been extensively studied, leaving a knowledge gap for practitioners and researchers alike. A systematic review o...