92,530 research outputs found
Preface
No full textThe purpose of this book is to present the current state of the art of the Virtual Element Method (VEM) by collecting contributions from many of the most active researchers in this field and covering a broad range of topics: from the mathematical foundation to real life computational applications.
The book is naturally divided into three parts. The first part of the book presents recent advances in theoretical and computational aspects of VEMs, discussing the generality of the meshes suitable to the VEM, the implementation of the VEM for linear and nonlinear PDEs, and the construction of discrete hessian complexes. The second part of the volume discusses Virtual Element discretization of paradigmatic linear and non-linear partial differential problems from computational mechanics, fluid dynamics, and wave propagation phenomena. Finally, the third part contains challenging applications such as the modeling of materials with fractures, magneto-hydrodynamics phenomena and contact solid mechanics.
The book is intended for graduate students and researchers in mathematics and engineering fields, interested in learning novel numerical techniques for the solution of partial differential equations. It may as well serve as useful reference material for numerical analysts practitioners of the field
Gearing up and accelerating cross-fertilization between academic and industrial robotics research in Europe: technology transfer experiments from the ECHORD project
No full textThis monograph by Florian Röhrbein, Germano Veiga and Ciro Natale is an edited collection of 15 authoritative contributions in the area of robot technology transfer between academia and industry. It comprises three parts on Future Industrial Robotics, Robotic Grasping as well as Human-Centered Robots. The book chapters cover almost all the topics nowadays considered ‘hot’ within the robotics community, from reliable object recognition to dexterous grasping, from speech recognition to intuitive robot programming, from mobile robot navigation to aerial robotics, from safe physical human-robot interaction to body extenders. All contributions stem from the results of ECHORD – the European Clearing House for Open Robotics Development, a large-scale integrating project funded by the European Commission within the 7th Framework Programme from 2009 to 2013. ECHORD’s two main pillars were the so-called experiments, 52 small-sized industry-driven research projects, and the structured dialog, a powerful interaction instrument between the stakeholders. The results described in this volume are expected to shed new light on innovation and technology transfer from academia to industry in the field of robotics.
Virtual Elements for linear elasicity problems
No full textWe discuss the application of virtual elements to linear elasticity problems, for both the compressible and the nearly incompressible case. Virtual elements are very close to mimetic finite differences (see, for linear elasticity, [L. Beira͂o da Veiga, M2AN Math. Model. Numer. Anal., 44 (2010), pp. 231--250]) and in particular to higher order mimetic finite differences. As such, they share the good features of being able to represent in an exact way certain physical properties (conservation, incompressibility, etc.) and of being applicable in very general geometries. The advantage of virtual elements is the ductility that easily allows high order accuracy and high order continuity
E. Veiga De Oliveira, F. Galhano & B. Pereira, Sistemas de atrelagem dos bois em Portugal
No full textStahl Paul-Henri. E. Veiga De Oliveira, F. Galhano & B. Pereira, Sistemas de atrelagem dos bois em Portugal. In: L'Homme, 1974, tome 14 n°2. pp. 157-158
E. Veiga De Oliveira, F. Galhano, B. Pereira, Actividades agro-marítimas em Portugal
No full textRosa Victor Pereira. E. Veiga De Oliveira, F. Galhano, B. Pereira, Actividades agro-marítimas em Portugal. In: L'Homme, 1977, tome 17 n°2-3. pp. 172-173
E. Veiga De Oliveira, F. Galhano, B. Pereira, Tecnologia tradicional portuguesa. O linho
No full textStahl Paul-Henri. E. Veiga De Oliveira, F. Galhano, B. Pereira, Tecnologia tradicional portuguesa. O linho. In: L'Homme, 1982, tome 22 n°1. p. 112
E. Veiga de Oliveira, F. Galhano, B. Pereira, Sistemas de Atrelagem dos Bois em Portugal.
No full textCaillier-Boisvert Colette. E. Veiga de Oliveira, F. Galhano, B. Pereira, Sistemas de Atrelagem dos Bois em Portugal. . In: Études rurales, n°58, 1975. pp. 117-118
E. Veiga De Oliveira, F. Galhano, B. Pereira, Construções primitivas em Portugal
No full textStahl Paul-Henri. E. Veiga De Oliveira, F. Galhano, B. Pereira, Construções primitivas em Portugal. In: L'Homme, 1972, tome 12 n°3. pp. 156-157
Integration schemes for von mises plasticity models based on exponential maps: numerical investigations and theoretical considerations
No full textWe consider three different exponential map algorithms for associative von-Mises plasticity with linear isotropic and kinematic hardening. The first scheme is based on a different formulation of the time continuous plasticity model, which automatically grants the yield consistency of the method in the numerical solution. The second one is the quadratically accurate but non-yield consistent method already proposed in Auricchio and Beirão da Veiga (Int. J. Numer. Meth. Engng 2003; 56: 1375-1396). The third method is an improved version of the second one, in which the yield consistency condition is enforced a posteriori. We also compare the performance of the three methods with the classical radial return map algorithm. We develop extensive numerical tests which clearly show the main advantages and disadvantages of the three methods
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