It is known in the last fifteen years that there is an increase of people in Spain over 35 years old significantly who are often training and competing at several levels in athletics. They are master athletes. There are not…

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Data Warehouses manage historical information for the decision making process, and this information could be discovered by unauthorized users if security constraints are not established. It is therefore highly important for OLAP tools to consider the security rules defined at…

China’s growing economic importance has led to a significant increase in the volume of empirical research about business and management in this country during the last few years. This study reviews the 180 empirical papers focusing on the Chinese context…

STUDY OBJECTIVE: The aim was to investigate the association between mothers' occupational exposure during pregnancy and the incidence of acute lymphoblastic leukaemia in children. DESIGN: The study was a case-control investigation. A face to face interview was used to assess…

This paper deals with the non-linear oscillation of a simple pendulum and presents an approach for solving the non-linear differential equation that governs its movement by using the harmonic balance method. With this technique it is possible to easily obtain…

The evenly convex hull of a given set is the intersection of all the open halfspaces
which contain such set (hence the convex hull is contained in the evenly convex hull). This paper
deals with finite dimensional linear systems containing…

The methods of differential geometry are used with the assumption that rays of light follow geodesic trajectories in a space whose metric is determined by the refraction index. Keeping this in mind, we show that these hypotheses are equivalent to…

The harmonic balance method is used to construct approximate frequency–amplitude relations and periodic solutions to the relativistic oscillator. By combining linearization of the governing equation with the harmonic balance method, we construct analytical approximations to the oscillation frequencies and periodic…

Our intention in this paper is to shortly address some of the basic categories that determine the paradigm of sport culture as we know it. We do believe that by understanding these basic categories the changes of prevailing sport paradigm,…