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AbstractAdvanced business services (ABS) are seen as generators and disseminators of innovation among their client companies, and their use by client companies can improve efficiency and productivity. However, one question that has not been addressed is whether ABS provision can be an explanatory factor for the total productivity of the factors (TPF). This paper aims to determine whether the innovation generated and/or transmitted by ABS companies is reflected in the TPF growth in the manufacturing sector. For this purpose, a Cobb-Douglas function was estimated using panel data analysis on data of ten OECD countries in the period 1977-1996. ABS labour was considered the proxy variable for the provision of these types of services and treated as a separate factor in the production process. The quantitative study shows that the contribution of labour endowment in ABS to the efficiency and productivity of manufacturing industry is significant, that it generates spillovers and that it is an explanatory factor for the TPF.

•Research on Solutrean points needs more interdisciplinary works beyond typology.•Analysis of fractures and dimensions of each element of the projectile points are key to establish their functionality.•Identification of remains of glue on Solutrean points, never recorded before, greatly establish hafting systems.•The percentage of Solutrean points with use marks, as well as that of unfinished ones provide information about the mobility and meat procurement strategies of the hunting-gathering groups of the time.

AbstractThis article aims to find an optimal solution for illuminating cave art, based on the improvement of color reproduction and minimizing the damage caused by visible radiation on the painting. To improve visual perception, a light source with optimal spectral distribution has been calculated. This spectral distribution minimizes the damage, maximizes the colorimetric distance between the color of the rock paintings and the closer stone, and takes into account how it was lit by the author. A mathematical function has been used to optimize the spectral distribution of the light source. With this aim, a tunable red–green–blue (RGB) light emitting diode (LED) luminaire has been used. It has been found that the new calculated lighting of the cave does not alter the environmental conditions by performing a test of algae growth and thermographic measurements.

La determinación de la posición angular instantánea del rotor es parte integral del control en los accionamientos de Motores de Reluctancia Conmutada (MRC). La medición directa de esta variable adiciona complejidad y costo al sistema y no siempre da buenos resultados. Esto ha motivado el desarrollo y prueba de estimadores de la posición angular del rotor que utilicen solamente las mediciones de las variables eléctricas del MRC. En este trabajo se presentan dos variantes del Estimador de Horizonte Deslizante (MHE) para estimar la velocidad y la posición angular del rotor del MRC MFR 132.5, empleando dos modelos distintos del motor, uno de caja blanca y otro de caja gris. Se muestran los resultados de la simulación de los estimadores diseñados para estimar la velocidad y la posición angular del rotor durante el arranque hasta haber activado consecutivamente todas las fases y para estimar estas variables cuando el motor trabaja regularmente y aparecen perturbaciones en el torque de la carga, considerando en ambos casos un error en la estimación de la posición angular de partida y la presencia de ruidos en las mediciones. Los resultados demuestran que este tipo de estimadores realiza estimaciones satisfactorias del estado del motor, aún ante la presencia de perturbaciones en el torque de la carga, siendo mejores cuando se utiliza un modelo gris del sistema. Copyright© 2014 CEA. Publicado por Elsevier España, S.L. Todos los derechos reservados.

Several hydroximethylfurfural (HMF) microbiosensors, based on a microelectrode configuration built by photolithographic techniques, have been developed. Two different biosensors based on the aldehyde dehydrogenase (ALDH) enzyme coupling with NADH oxidase (NOD) or diaphorase (Diaph) are described. Experimental variables were optimized using experimental design methodology, by central composite designs, taking the intensity registered for a given HMF solution as response. Given the reproducibility (residual standard deviation (RSD), 7.20%), repeatability (RSD=3%) and limit of detection (LOD)=1.68×10−4mol dm−3(α=β=0.05 and a replicate) reached by the ALDH‐Diaph microbiosensor under the optimum conditions, the analysis of HMF in honey was successfully accomplished.

To know the variations of serum transferrin receptor (sTfR) and its indices depending on the status of body iron and the presence of infection in children, to evaluate their usefulness for recognizing the nature of anemia in infection, and to know the role of erythropoietic activity in these conditions.

Puesto que la hipótesis explicativa de Asch respecto al fenómeno de la conformidad al grupo (que ahogaba porque en el sujeto se da una reorganización cognitiva y perceptiva) no quedó confirmada por sus experimentos, en los que los sujetos debían enfrentarse a tareas perceptivas altamente estructuradas, se hipotetizó que tal vez esta explicación sí sería aplicable a situaciones no estructuradas. Para comprobarlo, se planteó a 40 estudiantes una tarea de juicios de valor, asignando aleatoriamente a la mitad de ellos (grupo experimental) a presión grupal hacia una determinada decisión. Se bloqueó la variable sexo y se midió el estado de ansiedad de los sujetos ante la situación. Los resultados indicaron que 13 de los 20 sujetos del grupo experimental adoptaron la decisión del grupo de presión, X2(l) =36, p <. 01. Doce de estos trece presentaron en una entrevista posterior claros indicios de reorganización cognitiva, X2(1) = 11.1, p <. 05. La variable estado de ansiedad no mostró valores estadísticamente significativos en ningún sentido, con U(7,13) = 83.

Dystonia is a movement disorder characterised by sustained muscle contractions that produce repetitive twisting movements or abnormal postures. It can be classified according to the aetiology as primary (idiopathic and genetic forms), or secondary. The presentation associated with generalised, intense episodes and with exacerbation of severe muscle contractures and usually refractory to traditional pharmacotherapy is known as dystonic status or dystonic storm. In the present article, a case is presented of a 33-year-old patient with a history of congenital deafness, stimulant use disorder and on psychopharmacological treatment with antipsychotics, who presented with a severe dystonic reaction that evolved to a status dystonicus.