A simple method for retrieving information in Hopfield neural network is discussed. Numerical simulations for different network sizes were performed in order to test the ability of the model in retrieving patterns. It is shown that an imposed external field (stimulus) enhances the retrieval results of the neural network. For random and unbiased patterns the critical saturation parameter is enha...

In this paper, a multiagent system for supporting users in retrieving information from heterogeneous data sources, and classifying them according to users’ personal preferences, is presented. The system is built upon PACMAS, a generic architecture that supports the implementation of Personalized, Adaptive, and Cooperative MultiAgent Systems. Preliminary tests have been conducted to evaluate the...

In this paper we describe the work done by the Pattern Recognition and Computer Vision Laboratory (PeRCeiVe Lab) of the University of Catania (Italy) for the MediaEval 2014 Retrieving Diverse Social Images Task. The main challenge consists of retrieving, for a given topic, a set of photos which are relevant to the topic but also showing diverse views of it. We submitted four runs exploiting a c...

A large amount of video content is available and stored by broadcasters, libraries and other enterprises. However, the lack of effective and efficient tools for searching and retrieving has prevented video becoming a major value asset. Much work has been done for retrieving video information from constrained structured domains, such as news and sports, but general solutions for unstructured aud...