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In this paper a novel article ranking method called NectaRSS is introduced. The system recommends incoming articles, which we will designate as newsitems, to users based on their past choices. User preferences are automatically acquired, avoiding explicit feedback, and ranking is based on those preferences distilled to a user profile. NectaRSS uses the(More)
This paper investigates the behaviour of the Evolvable Agent model (EvAg) in static and dynamic environments. The EvAg is a spatially structured Genetic Algorithm (GA) designed to work on Peer-to-Peer (P2P) systems in which the population structure is a small-world graph built by newscast, a P2P protocol. Additionally to the profits in computing(More)
JavaScript is an interpreted language mainly known for its inclusion in web browsers, making them a container for rich Internet based applications. This has inspired its use, for a long time, as a tool for evolutionary algorithms, mainly so in browser-based volunteer computing environments. Several libraries have also been published so far and are in use.(More)
This paper describes Algorithm::Evolutionary (A::E), a Perl module released under an open source license and designed for the exploration and exploitation of evolutionary algorithms. We describe the design decisions taken to enhance flexibility, how performance was improved by using several implementation tweaks, and what kind of design patterns were(More)
In this paper we present a distributed Evolutionary Algorithm (EA) whose population is structured using newscast, a gossiping protocol. This algorithm has been designed to deal with computation-ally expensive problems via massive scalability; therefore, we analyse the response time of the model using large instances of well-known hard optimization problems(More)
In this paper we analyse the resilience of a Peer-to-Peer (P2P) Evolutionary Algorithm (EA) subject to the following dynamics: computing nodes acting as peers leave the system independently from each other causing a collective effect known as churn. Since the P2P EA has been designed to tackle large instances of computationally expensive problems, we will(More)
This work presents a Service Oriented Architecture for Evolutionary Algorithms (SOA-EA), and an implementation of this architecture using a specific technology (called OSGiLiath). Service Oriented Architecture is a computational paradigm where users interact using services to increase the integration between systems. The presented abstract architecture is(More)