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In this paper we propose methods to optimize the speed-up which can be obtained for a parallel program in a distributed system by modelling the assignment of the tasks of a parallel program as a graph partitioning problem. The tasks (set of instructions that must be executed sequentially) which compose the program are represented by weighted nodes, and the arcs of the graph represent the precedence...
In this paper is presented an adaptive module of the learning style of the students of the Computational Platform for the Educational Model based on the Cloud Paradigm, proposed in previous work. This adaptive module redefines the learning style that has the student, in order to improve his academic performance in the platform. The learning style of the students is very important in this platform,...
In this work we present a tool for the development of Fuzzy Cognitive Map (FCM). In our proposed tool, the FCM is defined by concepts and relationships that can change during the execution time. Using the tool, we can design a FCM, follow the evolution of a given FCM, change FCM defined previously, etc. Our tool allows to use the classical casual relationship defined in [2, 4], or to define the casual...
In this work we propose a Dynamical Fuzzy Cognitive Map (DFCM) where its casual relationships are based on fuzzy rules, in a way that the structure of the map changes during the phase of execution (runtime). We propose the modification of the values of the relationships between the concepts through of fuzzy rules derived from the concept states that represent the system modeled by the map. Our DFCM...
This article specific a management system of the learning cloud, based on the ODA (Ontology Driven Architecture) and SOA (Service Oriented Architecture) paradigms, of the educational online platform defined for the Career in Computer Science and Informatics in the University of the Andes in Mérida. This platform consists of three clouds: Formation Cloud, composed of the graph in which is defined the...
In a volumetric receiver installed in solar tower power plants, the absorber operates as a convective heat exchanger, absorbing concentrated solar radiation and transferring thermal energy to a fluid flowing through it. Radiation absorption is related to the absorber geometry, the optical properties of the absorber surface, and the incident radiation intensity distribution, which depends on the heliostat...
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