Tag: Contact

Bodies in Contact Rethinking Colonial Encounters in World History


Free Download Adele Perry, Carter Findley, Elisa Camiscioli, "Bodies in Contact: Rethinking Colonial Encounters in World History"
English | 2005 | pages: 460 | ISBN: 0822334550 | PDF | 2,0 mb
From portrayals of African women’s bodies in early modern European travel accounts to the relation between celibacy and Indian nationalism to the fate of the Korean "comfort women" forced into prostitution by the occupying Japanese army during the Second World War, the essays collected in Bodies in Contact demonstrate how a focus on the body as a site of cultural encounter provides essential insights into world history. Together these essays reveal the "body as contact zone" as a powerful analytic rubric for interpreting the mechanisms and legacies of colonialism and illuminating how attention to gender alters understandings of world history. Rather than privileging the operations of the Foreign Office or gentlemanly capitalists, these historical studies render the home, the street, the school, the club, and the marketplace visible as sites of imperial ideologies.

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Computational Contact Mechanics Geometrically Exact Theory for Arbitrary Shaped Bodies


Free Download Computational Contact Mechanics: Geometrically Exact Theory for Arbitrary Shaped Bodies By Alexander Konyukhov, Karl Schweizerhof (auth.)
2013 | 446 Pages | ISBN: 3642315305 | PDF | 16 MB
This book contains a systematical analysis of geometrical situations leading to contact pairs — point-to-surface, surface-to-surface, point-to-curve, curve-to-curve and curve-to-surface. Each contact pair is inherited with a special coordinate system based on its geometrical properties such as a Gaussian surface coordinate system or a Serret-Frenet curve coordinate system. The formulation in a covariant form allows in a straightforward fashion to consider various constitutive relations for a certain pair such as anisotropy for both frictional and structural parts. Then standard methods well known in computational contact mechanics such as penalty, Lagrange multiplier methods, combination of both and others are formulated in these coordinate systems. Such formulations require then the powerful apparatus of differential geometry of surfaces and curves as well as of convex analysis. The final goals of such transformations are then ready-for-implementation numerical algorithms within the finite element method including any arbitrary discretization techniques such as high order and isogeometric finite elements, which are most convenient for the considered geometrical situation.The book proposes a consistent study of geometry and kinematics, variational formulations, constitutive relations for surfaces and discretization techniques for all considered geometrical pairs and contains the associated numerical analysis as well as some new analytical results in contact mechanics.

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Extraterrestrials and the American Zeitgeist Alien Contact Tales Since the 1950s


Free Download Aaron John Gulyas, "Extraterrestrials and the American Zeitgeist: Alien Contact Tales Since the 1950s"
English | ISBN: 0786471166 | 2013 | 260 pages | PDF | 4 MB
Since the 1950s, men and women around the world have claimed to have had contact with human-like visitors from space. This book explores how the "contactee" subculture has critiqued political, social and cultural trends in the United States, Europe and elsewhere. Not merely quaint relics of the 1950s Atomic Age, contactees have continued their messages of transformation into the 21st century. Regardless of whether these alleged contacts took the form of physical meetings or channeled paranormal psychic communications, or whether they actually happened at all, contactees have provided a consistently relevant source of commentary on this world and beyond.

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Particles in Contact Micro Mechanics, Micro Process Dynamics and Particle Collective (Repost)


Free Download Sergiy Antonyuk, "Particles in Contact: Micro Mechanics, Micro Process Dynamics and Particle Collective"
English | 2019 | pages: 661 | ISBN: 3030158985, 3030159019 | PDF | 41,2 mb
This book contains the latest scientific findings in the area of granular materials, their physical fundamentals and applications in particle technology focused on the description of interactions of fine adhesive particles.In collaboration between physicists, chemists, mathematicians and mechanics and process engineers from 24 universities, new theories and methods for multiscale modeling and reliable measurement of particles are developed, with a focus on:* Basic physical-chemical processes in the contact zone: particle-particle and particle-wall contacts,* Particle collisions and their dynamics* Constitutive material laws for particle systems on the macro level.

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Principal Symbol Calculus on Contact Manifolds


Free Download Principal Symbol Calculus on Contact Manifolds
English | 2024 | ISBN: 3031699254 | 170 Pages | PDF EPUB (True) | 16 MB
This book develops a C*-algebraic approach to the notion of principal symbol on Heisenberg groups and, using the fact that contact manifolds are locally modeled by Heisenberg groups, on compact contact manifolds. Applying abstract theorems due to Lord, Sukochev, Zanin and McDonald, a principal symbol on the Heisenberg group is introduced as a homomorphism of C*-algebras. This leads to a version of Connes’ trace theorem for Heisenberg groups, followed by a proof of the equivariant behavior of the principal symbol under Heisenberg diffeomorphisms. Using this equivariance and the authors’ globalization theorem, techniques are developed which enable further extensions to arbitrary stratified Lie groups and, as a consequence, the notion of a principal symbol on compact contact manifolds is described via a patching process. Finally, the Connes trace formula on compact contact sub-Riemannian manifolds is established and a spectrally correct version of the sub-Riemannian volume is defined (different from Popp’s measure).

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