Hisham Alhussein

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This paper investigates the mobility analysis and forward kinematics of 4 different configurations of 3(rt)PS parallel manipulators in which the moving platform and the base are two arbitrarily chosen platforms. After proposing mathematical model, multivariate polynomials describing the position and orientation of the moving platform are constructed in(More)
Peer assessment is widely used at all levels of education. Students give and receive feedback from their classmates, and thereby produce a wealth of information that can potentially be used to improve the assessment process. But thus far, each online peerassessment system has been an entity unto itself. There has been no attempt to compare the approaches(More)
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