•  137
    Enterprise Web Accessibility Levels Amongst the Forbes 250: Where Art Thou O Virtuous Leader? (review)
    with Ramiro Gonçalves, Jorge Pereira, Manuel Au-Yong Oliveira, and João José P. Ferreira
    Journal of Business Ethics 113 (2): 363-375. 2013.
    The research team measured the enterprise web accessibility levels of the Forbes 250 largest enterprises using the fully automatic accessibility evaluation tool Sortsite, and presented the compliance of the evaluated websites to WCAG 1.0, WCAG 2.0 and Section 508 accessibility levels. Given the recent attention to organizational leaders having ethical duties towards their dedicated employees, we propose that ‘societal citizenship behaviour’ concerns ethical duties of organizational leaders towar…Read more
  •  52
    Dynamics of Epidemiological Models
    with Alberto Pinto, Maíra Aguiar, and Nico Stollenwerk
    Acta Biotheoretica 58 (4): 381-389. 2010.
    We study the SIS and SIRI epidemic models discussing different approaches to compute the thresholds that determine the appearance of an epidemic disease. The stochastic SIS model is a well known mathematical model, studied in several contexts. Here, we present recursively derivations of the dynamic equations for all the moments and we derive the stationary states of the state variables using the moment closure method. We observe that the steady states give a good approximation of the quasi-stati…Read more