NOTICE: this is the author's version of a work that was accepted for publication in Microelectronic Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reected in this document. Changes may have been made to this work since it was submitted for publication. A denitive version was subsequently published in Microelectronic Engineering, 124, 25 July 2014, 10.1016/j.mee.2014.06.002.
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Modelling and Experimental Verification of Heat Dissipation Mechanisms in an SU-8 Electrothermal MicrogripperBelen Solano
AbstractWithin this work, a microgripper based on a hot-cold arm principle was tested to give a greater understanding of the associated heat dissipation methods. Experiments were conducted in air at atmospheric and sub-atmospheric pressure, and in helium, argon and helium at sub-atmospheric pressure. The change in deflection, when using gases with different thermal conductivities and at varying pressures showed the significance of conduction through the atmosphere. The experimental results were found to verify a theoretical model created previously by this group, and a further model developed independently; both predicted the deflection that a given current would cause.
August i6o8 John Smith and his band of explorers captured an Indian named Amoroleck during a skirmish along the Rappahannock River. Asked why his men-a hunting party from towns upstreamhad attacked the English, Amoroleck replied that they had heard the strangers "were a people come from under the world, to take their world from them."1 Smith's prisoner grasped a simple yet important truth that students of colonial America have overlooked: after I492 native Americans lived in a world every bit as new as that confronting transplanted Africans or Europeans. The failure to explore the Indians' new world helps explain why, despite many excellent studies of the native American past,2 colonial history often remains "a history of those men and women-English, European, and African-who transformed America from a geographical expression into a new nation."3 One reason Indians generally are left out may be the apparent inability to fit them into the new world theme, a theme that exerts a powerful hold on our historical imagination and runs throughout Mr. Merrell is a member of the Department of History, Vassar College. Acknowledgments: I would like to thank the participants in the colloquium at the Institute of Early American History and Culture for their comments on a draft of this article. I am also grateful to Linda K. Merrell for preparing the map. ' Edward Arber and A. G. Bradley, eds., Travels and Works of Captain John Smith. . ., II (Edinburgh, I 9 I0), 427. 2 Bernard W. Sheehan, "Indian-White Relations in Early America:
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