• closedAccess   On the robustness of persistence in mutual fund performance 

      Matallín Sáez, Juan Carlos; Soler-Dominguez, Amparo; Tortosa-Ausina, Emili Elsevier (2016)
      This paper analyzes persistence in US equity mutual fund performance over the period 1990–2015. We apply commonly used measures of persistence, which we test using a set of simulated passive funds. In the first stage we ...
    • openAccess   Topological States in Twisted Pillared Phononic Plates 

      Jin, Yabin; Wang, Wan; Wen, Zhihui; Torrent, Daniel; Djafari Rouhani, Bahram Elsevier (2020-09-20)
      In recent years, the advances in topological insulator in the fields of condensed matter have been extended to classical wave systems such as acoustic and elastic waves. However, the quantitative robustness study of ...
    • openAccess   Topological vortex mode for flexural waves in pillared plates 

      Wen, Zhihui; Iglesias Martínez, Julio Andrés; Jin, Yabin; Li, Yan; Djafari Rouhani, Bahram; Torrent, Daniel; Raynaud, Jean-louis; Khelif, Abdelkrim Elsevier (2023)
      Localized topological modes with high robustness to various perturbations are receiving increasing attention. Recently, zero-order topological vortex modes have been designed in phononic structures, in analogy with ...