Although the actual state-of-the-art on Recommender Systems is good enough to allow recommendations and personalization along many application fields, developing a general purpose multi-algorithm recommender system is a tough task. In this paper we present the main challenges involved on developing such system and a system’s architecture that allows us to face this challenges.

It has been suggested in the literature of social psychology that consumers that search exhaustively for the best option of a product in the market -called maximizerseventually feel worse than those that just look for something good enough -in turn, satisficers-. We address this striking phenomenon using a formal framework for consumer rational choice relaying on time allocation which accounts ...

ed / Indexed Yes Open Access Yes http://www.frontiersin.org/Marine_Science

The resolution of conflicts between n aircraft is highly combinational and cannot be optimally solved using classical mathematical optimisation techniques. Using a priority order to solve a n-aircraft conflict is much easier but the solution is not optimal. However it is difficult to determine the best order, or even an order that is good enough to ensure that a solution exists. In this paper, ...

Sea level observations made in the Venice Lagoon between 1751 and 1792 have been recovered, consisting of two time series of daily data on high and low waters in Venice and Chioggia. From comparisons with modern observations, the quality of the 18th century data appears to be good enough to allow a useful analysis. A composite time series of daily mean sea level is obtained by merging the 18th ...

In a recent paper [1], it was shown that a new Genetic Algorithm (GA) performed better than basic GA. In the present paper, we will focus an Improved Genetic Algorithm which uses the theory of cosets. The new technique was tested using some benchmark functions [2] which the basic GA performance was not good enough. The main purpose of this paper is to suggest how to use Linear Codes properties ...

Gigerenzer and colleagues have proposed the ‘adaptive toolbox of heuristics’ as an account of resource-bounded human decision-making. According to these authors, evolution has endowed such toolboxes with ‘ecological rationality’, defined as the ability to make good quality decisions in their specific environments. Here we explore to what extent the mechanisms of evolution alone are sufficient t...

From the DTAG likability database the 30 most and 30 least likable ones have been selected for further phonetic analysis and expert questionnaire. In contrast to dislikable speakers, likable ones exhibit almost no perceivable accent, command style or disfluencies and were rated very high on all six questionnaire scales. Dislikable speakers are only moderately rated. However, dislikable speakers...

An exactly solvable model is used to investigate the assumptions behind color transparency. 1 INTRODUCTION Color transparency (CT) is the anomalously high transparency of the nucleus to nucle-ons in quasi-elastic high-momentum transfer nuclear processes, measured with resolution good enough to insure that no " extra " pions are produced. This means that the ab-sorptive nuclear optical potential...

In this paper, we propose a method for cataract screening. Referring to the fact of increasing number of cataract especially for the people who lived in the developing countries, this kind of discussion will be important. The method used three kinds of features; specular reflection appearance, texture uniformity and average intensity inside the pupil. Actually, The core of our method is based o...