In this work, we study a unilateral contact problem with non local friction of Coulombbetween a locking material and a rigid foundation. In the first step , we present the mathematicalmodel for a static process, we establish the variational formulation in the form of a variationalinequality and we prove the existence and uniqueness of the solution. In the second step, usingthe penalty method we...

This paper deals with an experimental description of the acoustic behaviour of non-consolidated granular materials submitted to static force. The aim of this work is to investigate the effect of a small amount of an interstitial fluid on the acoustic propagation. Measurements of the velocity and of the transmission of the coherent wave are performed for different values of the applied force. It...

Copyright 2007 by the American Society of Law, Medicine & Ethics, Inc., and Boston university. All rights reserved. For permission to photocopy articles or other materials appearing in the American Journal of Law & Medicine, contact Copyright Clearance Center, 222 Rosewood Drive, Danvers, Massachusetts, 01923; tel. 978-750-8400; fax 978-750-4470; or contact the Editor, American Society of Law, ...

Copyright 2008 by the American Society of Law, Medicine & Ethics, Inc., and Boston University. All rights reserved. For permission to photocopy articles or other materials appearing in the American Journal of Law & Medicine, contact Copyright Clearance Center, 222 Rosewood Drive, Danvers, Massachusetts, 01923; tel. 978-750-8400; fax 978-750-4470; or contact the Editor, American Society of Law, ...

This paper shows how contact curvature can be determined from a single contact with a cylindrical tactile sensor. When the tactile finger touches an unknown smooth convex surface, contact location, principal curvatures, and normal force are determined from a 4 x 4 window of strain measurements. In principle, contact properties can be determined by a linear inverse-filter process, but this appro...


 The purpose of this article is to demonstrate how the Wittgenstein Tractatus deals with themes related laws nature, as well metatheoretical principles science. More specifically, our intention expose notions scientific representation linked such those causality and induction. As a starting point, we propose that notion non-precedence one theory over another Hertzian inspiration, which ar...

In order to improve the service life of needle roller bearing used in a precision cycloid reducer, and reveal skew collision phenomenon bearing, based on force analysis transmission mechanism reducer considering friction between wheel, roller, cage, crank shaft, dynamic contact rolling bodies is simulated by Hertz elastic contact, where cage pocket hole equivalent spring damping, nonlinear mode...

The mechanical calculation model of rotary-vertical (RV) reducer is established on the basis considering displacement and stiffness. Without manufacturing error, parameters RV are input into solved by MATLAB software. Comparing solution results with analysis based Hertz contact theory, error within a reasonable range, which verifies reliability model. errors high-precision measuring instrument ...

This work describes the improved uniformity of short gate length (sub100nm) T-gate lithography observed for InP HEMT devices through the development of a nonannealed ohmic contact process. The incorporation of such a process allows the reversal of ohmic and gate levels as part of a standard device process flow. This eliminates fluctuations in the gate geometry that result from the spinning of g...