Enviaments recents

  • Analysis of mesh router placement in wireless mesh networks using Friedman test 

    Oda, Tetsuya; Barolli, Admir; Spaho, Evjola; Barolli, Leonard; Xhafa Xhafa, Fatos (2014)
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    In this paper, we deal with connectivity and coverage problem in Wireless Mesh Networks (WMNs). We used Friedman test to compare Genetic Algorithm (GA) and Tabu Search (TS). We found out that GA and TS have difference in ...
  • A Tabu Search algorithm for ground station scheduling problem 

    Xhafa Xhafa, Fatos; Herrero Garcia, Xavier; Barolli, Admir; Takizawa, Makoto (2014)
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    Mission planning plays an important role in satellite control systems. Satellites are not autonomously operated in many cases but are controlled by tele-commands transmitted from ground stations. Therefore, mission scheduling ...
  • Security in online learning assessment towards an effective trustworthiness approach to support e-learning teams 

    Miguel, Jorge; Caballé Llobet, Santiago; Xhafa Xhafa, Fatos; Prieto, Josep (2014)
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    This paper proposes a trustworthiness model for the design of secure learning assessment in on-line collaborative learning groups. Although computer supported collaborative learning has been widely adopted in many educational ...
  • Ring oscillator clocks and margins 

    Cortadella Fortuny, Jordi; Lupon Navazo, Marc; Moreno Vega, Alberto; Roca Pérez, Antoni; Sapatnekar, Sachin (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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    How much margin do we have to add to the delay lines of a bundled-data circuit? This paper is an attempt to give a methodical answer to this question, taking into account all sources of variability and the existing EDA ...
  • Discovering duplicate tasks in transition systems for the simplification of process models 

    San Pedro Martín, Javier de; Cortadella Fortuny, Jordi (Springer, 2016)
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    This work presents a set of methods to improve the understandability of process models. Traditionally, simplification methods trade off quality metrics, such as fitness or precision. Conversely, the methods proposed in ...
  • MapReduce vs. pipelining counting triangles 

    Pasarella Sánchez, Ana Edelmira; Vidal Serodio, Maria Esther; Zoltan, Cristina (CEUR-WS.org, 2016)
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    In this paper we follow an alternative approach named pipeline, to implement a parallel implementation of the well-known problem of counting triangles in a graph. This problem is especially interesting either when the input ...
  • Security-sensitive tackling of obstructed workflow executions 

    Holderer, Julius; Carmona Vargas, Josep; Müller, Günter (CEUR-WS.org, 2016)
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    Imposing access control onto workflows considerably reduces the set of users authorized to execute the workflow tasks. Further constraints (e.g. Separation of Duties) as well as unexpected unavailabilty of users may finally ...
  • De Menos a Distinto: Estudio de la Implantación de R en las asignaturas del grado de estadística 

    Baixeries i Juvillà, Jaume; Fairén González, Marta; Gabarró Vallès, Joaquim; Pasarella Sánchez, Ana Edelmira (2016)
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    Teaching computer science in degrees that are not computer science related presents an important challenge: to motivate the students and to achieve good average grades. The student’s complaint is always based ...
  • Incorporating negative information in process discovery 

    Ponce de León, Hernán; Carmona Vargas, Josep; vanden Broucke, Seppe (Springer, 2015)
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    The discovery of a formal process model from event logs describing real process executions is a challenging problem that has been studied from several angles. Most of the contributions consider the extraction of a model ...
  • Log-based simplification of process models 

    San Pedro Martín, Javier de; Carmona Vargas, Josep; Cortadella Fortuny, Jordi (Springer, 2015)
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    The visualization of models is essential for user-friendly human-machine interactions during Process Mining. A simple graphical representation contributes to give intuitive information about the behavior of a system. ...

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