We develop a theory to explain the transition from stagnation to modern growth. We focus on the forces that shaped the evolution of total factor productivity in agriculture and manufacturing across history. More specifically, we build a multisector model of…

In this paper, a method of event ordering based on temporal information resolution is presented. This method consists of two main steps: on the one hand, the recognition and resolution of the temporal expressions that can be transformed on a…

The exponential increase of subjective, user-generated content since the birth of the Social Web, has led to the necessity of developing automatic text processing systems able to extract, process and present relevant knowledge. In this paper, we tackle the Opinion…

Presentamos Sentitext, un sistema de análisis de sentimiento con arquitectura cliente-servidor para el español, cuya característica más distintiva es el estar basado en conocimiento. En primer lugar describimos las fuentes de conocimiento léxico que el analizador utiliza y a continuación…

This paper describes an adaptive and autocalibrated method to track surfaces. To do so, a non time
dependent impedance control system is proposed. This method fuses visual and force information to track a
given trajectory maintaining the contact with the…

Los impactos ecológicos de las especies introducidas constituyen uno de los aspectos menos investigados de la ecología de las
invasiones, especialmente en Europa. La mayor parte de los estudios realizados se han restringido a especies que tienen un impacto
económico…

En este artículo, se presenta una propuesta con base en MDWE (Model Driven Web Engineering) para soportar trazabilidad (elemento-a-elemento) aplicando modelos weaving. El método de diseño Web A-OOH (Adaptive Object Oriented Hypermedia) es aplicado para representar el modelo de requisitos,…

El mes de diciembre de 1926 conoció una de las grandes situaciones de frío y nieve que han azotado las tierras ibéricas a lo largo del siglo XX. La nevada de las navidades de 1926-27 forma, junto a las oleadas…

Spatial data warehouses (SDW) rely on extended multidimensional (MD) models in order to provide decision makers with appropriate structures to intuitively analyse spatial data. Several SDW development approaches provide a conceptual modeling and some guidelines in order to obtain logical…

The purpose of the study was to investigate whether teachers’ knowledge of student assessment was influenced by their gender and if it was related to their teaching experience (years in education). One hundred and twenty six physical education teachers (n=126)…