Ofshoring de servicios en la economía española en el periodo 2000-2007

La literatura económica ha centrado la atención en el offshoring de servicios y en su efecto sobre el nivel de empleo nacional, unido a importantes críticas en relación al impacto negativo que esta estrategia provoca en términos de destrucción de empleos nacionales. En este trabajo se analiza la relevancia que tiene el offshoring de servicios en la economía española y, en concreto, en las ramas de servicios y se estudia su efecto sobre el nivel de empleo de este sector. El análisis empírico se lleva a cabo estimando una función de demanda de trabajo con elasticidad de sustitución constante (CES), incluyendo en la misma el efecto de offshoring. Este estudio se realiza para el periodo previo a la crisis, 2000-2007, a partir de los datos contenidos en las Tablas Input-Output de la Contabilidad Nacional del INE.

Contextualising Social Work Education in India

Professional Social Work Education is commemorating 75 years of its contribution in addressing social problems and social welfare in India. While engaging layers of social realities, social work tries to create academic rigour, tests out new models and demands a statutory professional regulatory system. This article provides an overview on the issues, challenges and concerns of social work education in India. The first part details the historical development, the second part brings out various debates, the third part discusses the future concerns and challenges for social work education in India and it ends with a discussion.

Surface growth for molten silicon infiltration into carbon millimeter-sized channels: Lattice–Boltzmann simulations, experiments and models

The process of liquid silicon infiltration is investigated for channels with radii from 0.25 to 0.75 [mm] drilled in compact carbon preforms. The advantage of this setup is that the study of the phenomenon results to be simplified. For comparison purposes, attempts are made in order to work out a framework for evaluating the accuracy of simulations. The approach relies on dimensionless numbers involving the properties of the surface reaction. It turns out that complex hydrodynamic behavior derived from second Newton law can be made consistent with Lattice-Boltzmann simulations. The experiments give clear evidence that the growth of silicon carbide proceeds in two different stages and basic mechanisms are highlighted. Lattice-Boltzmann simulations prove to be an effective tool for the description of the growing phase. Namely, essential experimental constraints can be implemented. As a result, the existing models are useful to gain more insight on the process of reactive infiltration into porous media in the first stage of penetration, i.e. up to pore closure because of surface growth. A way allowing to implement the resistance from chemical reaction in Darcy law is also proposed.