Copper nanoparticles on titania effectively catalyse the oxidative homocoupling of terminal alkynes in the presence of piperidine as a base in tetrahydrofuran (THF) or under solvent-free conditions. A wide range of diynes have been synthesised in high yields using low…

El triatlón es un deporte combinado y de resistencia donde se desarrollan sin solución de continuidad natación, ciclismo y carrera a pie, siempre en ese orden y sin parar el cronometro. La distancia Sprint es la más corta según el…

This research analyzes different aspects related to the sociological context of Spanish sportsmen and sportswomen, specifically the sociological context of athletics, in a time when women practically compete in the same events than men, and sports are accessible and desirable…

The behaviour of a desolvation system based on microwave heating (termed a microwave desolvation system, MWDS) with low acid concentration solutions was evaluated in inductively coupled plasma mass spectrometry. Studies included water, sulfuric acid, perchloric acid, nitric acid and hydrochloric…

We report the results of an experimental-theoretical study on the stopping power of ZrO2 films for swift H and He ion beams. The experiments, using the Rutherford Backscattering technique, were done for protons with incident energies in the range 200–1500…

El presente artículo aborda el conocimiento de la habilidad motriz del equilibrio en el medio terrestre como fundamento con el que poder realizar, posteriormente, las adaptaciones necesarias y específicas a las características propias que tiene el medio acuático para desarrollar…

The aim of this paper is to explore the reasons that lead to information systems outsourcing in the largest Spanish firms. Our paper takes as its starting point the previous literature on information systems and tries to analyse if those…

The traditional games of children are the maximum exponent of a people’s culture of play, and though these games are sometimes derived from adult ceremonies, in spirit they belong to the world of children. Most authors assume that games depend…

A set is called Motzkin decomposable when it can be expressed as the Minkowski sum of a compact convex set with a closed convex cone. The main result in this paper establishes that a closed convex set is Motzkin decomposable…

Autonomous navigation is one of the most essential capabilities of autonomous robots. In order to navigate autonomously, robots need to detect obstacles. While many approaches achieve good results tackling this problem with lidar sensor devices, vision based approaches are cheaper…