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Continuous flow microreactors with an annular microchannel for cyclical chemical reactions were fabricated by either bulk micromachining in silicon or by rapid prototyping using EPON SU-8. Fluid propulsion in these unusual microchannels was achieved using AC magnetohydrodynamic (MHD) actuation. This integrated micropumping mechanism obviates the use of(More)
and is reprinted with permission from Lane WA. The operative treatment of fractures. I HOPE to put before you clearly and briefly my views of and experience in the treatment of simple fractures. I was originally led to resort to operative procedures by finding, from the dissection of bodies whose bones had sustained fractures, that the fragments when(More)
The method of extracting MOSFET model parameters using optimization offers significant advantages over classical methods of extracting model parameters sequentially. Previous work in this field has concentrated on speed of convergence rather than general applicability. Gradient following methods have been applied to this problem but difficulties arise(More)
Ultraviolet images of Venus over a 3-month period show marked evolution of the planetary scale features in the cloud patterns. The dark horizontal Y feature recurs quasi-periodically, at intervals of about 4 days, but it has also been absent for periods of several weeks. Bow-shaped features observed in Pioneer Venus images are farther upstream from the(More)
The first polarization measurements of the orbiter cloud photopolarimeter have detected a planet-wide layer of submicrometer aerosols of substantial visible optical thickness, of the order of 0.05 to 0.1, in the lower stratosphere well above the main visible sulfuric acid cloud layer. Early images show a number of features observed by Mariner 10 in 1974,(More)
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