Experiencias de aprendizaje con las TIC desde una perspectiva dialógica: Hacia la desaparición de las fronteras entre los diferentes escenarios educativos

En la sociedad actual, los diferentes ámbitos “clásicos” de la educación – formal, no formal e informal-, tienden a mezclarse y ejercer de forma superpuesta su dominio. Las pretensiones de poder ya no son válidas. Ahora necesitamos el diálogo argumentado para llegar a acuerdos, para establecer las funciones y roles que antes estaban dadas de antemano. Al mismo tiempo que vehículo de consenso comprometedor, la palabra compartida canaliza los aprendizajes necesarios en la sociedad actual: lo que sabemos se construye en interacciones mediadas por el lenguaje. Estas interacciones se dan ya en muchas ocasiones en entornos o redes virtuales. El presente trabajo trata de visibilizar prácticas educativas que han tenido su punto de partida en el acuerdo entre familiares, profesorado y alumnado para lograr el aprendizaje de estos. El hoy necesario uso de las TIC ha sido clave en la consecución y mantenimiento de dichos compromisos y aprendizajes.Departamento de PedagogíaMáster en Psicopedagogí

Variability in metal deposition among industrial, rural and urban areas in the Cantabria region (Northern Spain)

Cantabria is a small region located in Northern Spain that combines different land uses; thus, urban, industrial and rural areas are present in a relatively small area (5300 km2); however, the anthropogenic influence is evident by studying the deposition of metals towards these areas. Three sampling sites (industrial, urban and rural) were selected to assess the variability in metal deposition. Sampling was carried out monthly (from January 2012 to July 2012) using a bulk (funnelbottle) sampler. As, Cd, Cr, Cu, Mn, Mo, Ni, Pb, Ti, Zn and V were determined in the water-soluble and in the insoluble fractions of deposition samples. The impact of the human activities in the industrial area can be seen on several metals such as Pb, Zn, Cu and Mn. The most obvious influence was found for Mn, high fluxes were measured in the industrial site with a mean value of 2260 μg/m2·day; in contrast to urban (99.6 μg/m2·day) and rural (15.3 μg/m2·day) areas. The lowest flux values were found in the rural area for all the elements. Enrichment Factor (EF) analysis were also studied for the three sites. The high EFs values found for Pb, Mn, Cu, and Zn (>100) in the industrial site point to significant anthropogenic sources, mainly originated from industrial activities (steel and ferro-manganese alloy manufacturing plants) and road traffic

A comparative study between the fluxes of trace elements in bulk atmospheric deposition at industrial, urban, traffic, and rural sites

The input of trace elements via atmospheric deposition towards industrial, urban, traffic, and rural areas is quite different and depends on the intensity of the anthropogenic activity. A comparative study between the element deposition fluxes in four sampling sites (industrial, urban, traffic, and rural) of the Cantabria region (northern Spain) has been performed. Sampling was carried out monthly using a bulk (funnel bottle) sampler. The trace elements, As, Cd, Cr, Cu, Mn, Mo, Ni, Pb, Ti, Zn, and V, were determined in the water soluble and insoluble fractions of bulk deposition samples. The element deposition fluxes at the rural, urban, and traffic sites followed a similar order (Zn>Mn>>Cu=Ti>Pb>V=Cr>Ni>>As=Mo>Cd). The most enriched elements were Cd, Zn, and Cu, while V, Ni, and Cr were less enriched. An extremely high deposition of Mn was found at the industrial site, leading to high enrichment factor values, resulting from the presence of a ferro-manganese/silicomanganese production plant in the vicinity of the sampling site. Important differences were found in the element solubilities in the studied sites; the element solubilities were higher at the traffic and rural sites, and lower at the urban and industrial sites. For all sites, Zn and Cd were the most soluble elements, whereas Cr and Ti were less soluble. The inter-site correlation coefficients for each element were calculated to assess the differences between the sites. The rural and traffic sites showed some similarities in the sources of trace elements; however, the sources of these elements at the industrial and rural sites were quite different. Additionally, the element fluxes measured in the insoluble fraction of the bulk atmospheric deposition exhibited a good correlation with the daily traffic volume at the traffic site.The authors are grateful for the financial support from the CTM 2010-16068 (Spanish Ministry of Science and Innovation) and CTM 2013-43904 R (Spanish Ministry of Economy and Competitiveness) projects. The “Consejería de Medio Ambiente” from the Cantabria Government is also acknowledged for sending the report on the background levels of heavy metals and trace elements in soils in the Cantabria region. The authors are also grateful to “Ayuntamiento de Camargo” for helping us with the sampling site of Maliaño

Juez de comisión para el control de las cuentas toledanas en 1635-1636

En este estudio se refleja la participación del arbitrista Miguel Caza de Leruela en el examen de las cuentas de la ciudad de Toledo entre 1635 y 1636 aportando datos biográficos hasta ahora desconocidos

Levels and sources of polycyclic aromatic hydrocarbons in the soluble fraction of the atmospheric deposition in Cantabria (northern Spain)

The aim of this work is to assess the levels of polycyclic aromatic hydrocarbons (PAHs) in the soluble fraction of the bulk atmospheric deposition in four sites of a small region located in northern Spain (Cantabria). Samples were collected monthly for two years at an urban site (Santander), and for one year at an industrial (Maliaño), rural (Bárcena Mayor) and traffic (Cabezón de la Sal) sites. Samples were filtered and the filtrate was extracted, concentrated, purified and analysed for 15 PAHs: acenaphthylene (ACY), acenaphthene (ACE), fluorene (FLU), phenanthrene (PHE), anthracene (ANT), fluoranthene (FLA), pyrene (PYR), benzo[a]anthracene (BaA), chrysene (CHR), benzo[b]fluoranthene (BbF), benzo[k]fluoranthene (BkF), benzo[a]pyrene (BaP), indeno[1,2,3-cd]pyrene (IcdP), dibenzo[a,h]anthracene (DahA), and benzo[ghi]perylene (BghiP). The highest deposition fluxes of PAHs were found at the industrial site (Maliaño); the total PAH fluxes at the other sites were similar. Box plots of the PAH levels found in the literature in wet and bulk deposition samples were used to compare the values observed in this work. FLA, BaA, PHE and PYR were the most abundant PAHs at the industrial site. At the urban and rural site, the profile found in the deposition samples was similar: PHE>FLA>BaA>PYR. The traffic site showed a different profile: PYR>ANT>FLU>FLA. A preliminary source identification study was made by calculating diagnostic ratios of some PAH isomers (FLA/(FLA+PYR) and BaA/(BaA+CHR)); these ratios were compared with those found for the main PAH industrial and non-industrial sources in the region.This work was supported by the Spanish Ministry of Economy and Competitiveness (MINECO) through the Projects CTM2010-16068 and CTM2013-43904R

Implementación mediante FPGA de un sistema SVM de verificación de locutor

Los sistemas biométricos caracterizados por su alto nivel de seguridad se implementan habitualmente con sistemas procesadores de altas prestaciones como los ordenadores personales. Estos procesadores trabajan en un rango de frecuencias de GHz que les permiten realizar millones de operaciones por segundo, de forma que pueden ejecutar en tiempo real complejos algoritmos de verificación. Sin embargo, esta solución de implementación tiene el inconveniente del elevado coste. La utilización de dispositivos programables del tipo FPGA (Field Programmable Gate Array) permite obtener a bajo coste soluciones a medida con las que se consiguen elevadas velocidades de proceso similares a los sistemas μP de altas prestaciones. En este artículo se presenta el diseño e implementación sobre una FPGA de un sistema de verificación de locutor basado en los coeficientes Mel-Cepstrum y en un algoritmo de clasificación SVM (Support Vector Machines). Los resultados experimentales obtenidos con el diseño propuesto muestran una velocidad de proceso equiparable a la conseguida con un ordenador personal basado en el μP Pentium IV.Peer ReviewedPostprint (published version

TERASENSE: THz device technology laboratory: final summary

The use of THz frequencies, particularly W and G band allows reaching higher resolution and deeper penetration in emerging applications like imaging, sensing, etc. The development of those new applications lays on reliable technologies, background of expertise and know-how. The CDS2008-00068 TERASENSE CONSOLIDER project has given the opportunity to extent upwards in frequency the previous background of the microwaves research group partners. This article summarizes the developments of the TERASENSE work package “THz Device Technology Laboratory”.This work was supported by the Spanish Ministerio de Ciencia e Innovación through the CONSOLIDER-INGENIO 2010 program reference CSD2008-00068 TERASENSE

Levels and sources of trace elements and polycyclic aromatic hydrocarbons in atmospheric deposition in Cantabria

RESUMEN: La deposición atmosférica es un mecanismo de aporte de sustancias desde la atmósfera hacia la superficie. Entre estas sustancias se incluyen elementos traza o hidrocarburos aromáticos policíclicos (HAPs). El muestreo, caracterización y evaluación se ha realizado en cuatro puntos diferentes de la Comunidad Autónoma de Cantabria, representativos a su vez de zona industrial, urbana, rural y tráfico. En cuanto a elementos traza, los niveles encontrados varían dependiendo de la zona estudiada. Además se identificaron fuentes comunes y locales en los diferentes puntos estudiados. Por otro lado se identificaron Zn y Mn como los principales trazadores del punto de muestreo urbano a partir del desarrollo del modelo PMF. En cuanto a las HAPs, los niveles de estos compuestos dependen de la zona estudiada, siendo la zona industrial la que presenta los niveles más elevados. Finalmente, para llevar a cabo el estudio de fuentes de emisión se emplearon ratios de diagnóstico.ABSTRACT: Atmospheric deposition is the transfer of substances from the atmosphere to the surface. These substances include trace elements or polycyclic aromatic hydrocarbons (PAHs). Sampling, Characterization and evaluation has been carried out in four different sites of Cantabria region representing industrial, urban, rural and traffic environments. Trace elements levels varied depending on the studied area. Furthermore, common and local sources were identified in the different sites. In addition, Zn and Mn were identified as the main tracers in the urban site according to PMF model. Otherwise, PAHs levels depended on the area studied, showing the industrial site the highest levels. Finally, with the aim of studying emission sources diagnostic ratios were used

Procedure for the determination of trace metals in atmospheric deposition

Ingeniería técnica Industrial. Especialidad en Química industria