The message of this Editorial is simple and straightforward. For the past decade or more, billions of dollars have been invested by the pharmaceutical industry and the National Institutes ofHealth (NIH) to develop effective therapies for Alzheimerdisease.Despite thesevast sumsofmoney, aneffective therapy todelayorpreventAlzheimerdiseasehasnotbeendeveloped. Seeing the lack of progress, several m...

Michael Moodie is President of the Chemical and Biological Arms Control Institute in Alexandria, Virginia. He is a former Assistant Director of the U.S. Arms Control and Disarmament Agency, where he had responsibility for a range of arms control matters, including negotiations concluding the Chemical Weapons Convention and issues related to the Biological and Toxin Weapons Convention. Dr. Amy S...

This paper presents a hardware configuration for a long reach robotic arm in which passive dampers eliminate unwanted oscillation. This paper derives and reduces the equations of motion for the proposed configuration; then develops a "realistic" design. Using a single degree of freedom approximation, the paper presents and experimentally verifies equations for the dominant natural frequency and...

[32] Nader Sadegh and Roberto Horowitz. Stability and robustness analysis of a class of adaptive controllers for robotic manipulators. [40] John T. Wen and David S. Bayard. Robust control for robotic manipulators part ii: Adaptive case. Comparative experiments with a new adaptive controller for robot arms.

Ron Smith is Professor of Economics, Birkbeck College, University of London. He has been Visiting Professor at the London Business School and the University of Colorado and has published seven books and over a hundred papers in the areas of applied econometrics and defense economics. Bernard Udis is Professor of Economics, Emeritus, at the University of Colorado at Boulder. During 1997, he was ...

This paper presents a new model-based adaptive controller and proof of its global asymptotic stability with respect to the standard rigid-body model of robot-arm dynamics. Experimental data from a study of one new and several established globally asymptotically stable adaptive controllers on two very different robot arms 1) demonstrate the superior tracking performance afforded by the model-bas...