Constitutive equations and wave propagation in Green\u2013Naghdi type II and III thermoelectroelasticity

In this article we extend the theory of thermoelasticity devised by Green and Naghdi to the framework of finite thermoelectroelasticity. Both isotropic and transversely isotropic bodies are considered and thermodynamic restrictions on their constitutive relations are obtained by virtue of the reduced energy equality. In the second part, a linearized theory for transversely isotropic ther- mopiezoelectricity is derived from thermodynamic restrictions by construct- ing the free energy as a quadratic function of the 11 second-order invariants of the basic melds. The resulting theory provides a natural extension of the (linear) Green and Naghdi theory for types II and III rigid heat conductors. As a particular case, we derive the linear system which rules the processes depending on the symmetry axis coordinate only

Torino 1884: Africani in mostra

A study of the first Italian exhibition of human beings in 1884 with a propaganda purpose referring to the start of Italian colonial enterprises in Eastern Afric

Cellular Automaton for Realistic Modelling of Landslides

A numerical model is developed for the simulation of debris flow in landslides over a complex three dimensional topography. The model is based on a lattice, in which debris can be transferred among nearest neighbors according to established empirical relationships for granular flows. The model is then validated by comparing a simulation with reported field data. Our model is in fact a realistic elaboration of simpler ``sandpile automata'', which have in recent years been studied as supposedly paradigmatic of ``self-organized criticality''. Statistics and scaling properties of the simulation are examined, and show that the model has an intermittent behavior.Comment: Revised version (gramatical and writing style cleanup mainly). Accepted for publication by Nonlinear Processes in Geophysics. 16 pages, 98Kb uuencoded compressed dvi file (that's the way life is easiest). Big (6Mb) postscript figures available upon request from [email protected] / [email protected]

Simulation of Impedance Discontinuities Resulting from Degradation of Interconnections on Printed Circuit Boards

Numerical simulation of impedance discontinuities resulting from degradation of interconnections on printed circuit board