Affiliation: | 1. Department of Physics, University of évora, Colégio Luís António Verney, Rua Rom?o Ramalho, 59, 7002-554, évora, Portugal 5. ICIST, Ottawa, Canada 2. Institute of Structural Mechanics, Bauhaus-University Weimar, MarienstraSSe 15, 99423, Weimar, Germany 3. Departamento de Engenharia Mecanica, University of Aveiro, Campo Universitário de Santiago, 3810-193, Aveiro, Portugal 4. Mechanical Engineering Department, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465, Porto, Portugal
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