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• Libro
  Book of abstract RUC-APS international conference 2021

  (University of Liverpool, United Kingdom, 2021) Hernández, Jorge ; Brockley, Rachel ; Antonelli, Leandro ; Esteso, Ana ; Liu, Shaofeng ; Iannacone, Rina ; Arias, Horacio ; Zarate, Pascale ; Kacprzyk, Janusz ; Fernández, Alejandro

  This book includes the abstracts of accepted submissions to the 2nd International RUC-APS conference, held online from November 29th to December 2nd 2021.
• Parte de libro
  A User Interface for Consistent AHP Pairwise Comparisons

  (Springer, Cham, 2021) Cimadamore, Andrés ; Fernández, Alejandro ; Ye, Chenhui ; Zaraté, Pascale ; Kamissoko, Daouda

  Decision Makers generally reason on several criteria, aiming to obtain a total consistency or partial order of several alternatives. MultiCriteria analysis is based on the assumption that such ordering exists. Decision Makers are supported by several kinds of approaches or tools. One approach consists in comparing the criteria two by two, i.e. pairwise comparison, to find the relative importance of each criterion. This relative importance, called weight of criteria, is used to find the final order of alternatives. One methodology, developed by Saaty, called Analytical Hierarchical Process (AHP), is based on this principle of pairwise comparison. Having the weights of criteria, the decision makers have then to compare the alternatives two by two for each criterion. Pairwise comparisons are simple to use; however, as the number of items to compare increases, so do the effort of conducting all comparisons and the probability of introducing inconsistencies. In this article we present an innovative approach to conduct pairwise comparisons based on a UI widget that resembles an interactive data plot. It uses the transitivity property of a consistent comparison matrix to infer comparisons. Our hypothesis is that this new approach is more efficient (as it reduces the number of actions the user must conduct to compare all items), more effective (as it limits the sources of inconsistencies), and yields better user satisfaction. We conducted a controlled experiment involving 50 participants. We observed that the proposed widget reduces the effort of making pairwise comparisons, improves the consistency of the comparisons, and leads to a better user experience.
• Parte de libro
  Optimizing a Gamified Design Through Reinforcement Learning - A Case Study in Stack Overflow

  ( 2021) Martin, Jonathan ; Torres, Diego ; Fernández, Alejandro

  Gamification can be used to foster participation in knowledge sharing communities. While designing and assessing the potential impact of a gamification design in such a context, it is important to avoid work disruption and negative side effects. A gamification optimization approach implemented with deep reinforcement learning based on play-testing approaches helps prevent possible disruptive configuration and has the capability to adapt to different communities or gamification targets. In this research, a case of study for this approach is presented running over the Stack Overflow Q&A community. The approach detects the best configuration for a Contribution, Reinforcement, and Dissemination (CRD) gamification strategy using Stack Overflow historical data in a year. The results show that the approach funds proper gamification strategy configurations. Moreover, those configurations are robust enough to be applied along the time unseen periods.
• Parte de libro
  La comunicación: el futuro de las redes sociales

  ( 2019) Rosen, Marta ; Fernández, Alejandro ; Muravchik, Carlos Horacio

  En este cápitulo los autores discuten aspectos de privacidad, rol politico, ética y valores de las redes sociales, enmarcando las mismas en el contexto de la evolución de las comunicaciones.