El papel de la monarquía en la consolidación señorial del obispo de Oviedo

RESUMEN: Alfonso VI establece las bases de la formación del dominio señorial de los obispos de Oviedo. El año 1075 concede a los titulares de la mitra la tierra realenga –valle> mandación– de Llangréu (Asturias): una circunscripción territorial bien definida por la topografía y probablemente muy antigua. Los hombres de la misma –hereditarii–, que se consideran libres y no quieren depender de los obispos ovetenses, defienden sus libertades ante el propio soberano. Unos años más tarde –1106– éste concede privilegios jurídicos a los dominios señoriales de los prelados de San Salvador de Oviedo. Aquí se analiza la naturaleza de las concesiones reales y las consecuencias socioeconómicas y políticas de las mismas. También se pone especial atención a la validez o autenticidad de algunas de las piezas documentales utilizadas, sometiéndolas a un riguroso análisis diplomático. En realidad, la mayoría de los diplomas altomedievales y no originales, relacionados con la misma, sufrieron muchas alteraciones formales e incluso de fondo, atribuibles, por lo general, al scriptorium del obispo D. Pelayo (1101-1139), el verdadero artífice y creador de la diócesis de Oviedo en su dimensión administrativa y feudal.ABSTRACT: Alfonso VI establishes the bases of the formation of the noble dominion of the bishops of Oviedo. On 1075 he grants to the holders of mitre the land of realengo –valley>mandación– of Llangreu (Asturias): a territorial circumscription well defined by the topography and probably very old. The inhabitants of those territories –hereditarii– who consider themselves free and do not want to depend on Oviedo’s bishops, defend their liberties before the king. Some years later, 1106, the sovereign gives legal grant privileges to the noble dominions of the prelates of San Salvador of Oviedo. This work analyzes the nature of those concessions and their socioeconomic and political consequences. We also pay special attention to the validity or authenticity of some used documentary pieces, putting them under a rigorous diplomatic analysis. In fact, most of the early medieval and non-original diplomas, related to the same one, underwent many formal alterations and even of background. These alterations are generally atributed to the bishop D. Pelayo’s Scriptorium (1101-1139), the true architect and creator of Oviedo’s diocese in its administrative and feudal dimension.</p

Implementation and design of a service-based framework to integrate personal and institutional learning environments

The landscape of teaching and learning has changed in recent years because of the application of Information and Communications technology. Among the most representative innovations in this regard are Learning Management Systems. Despite of their popularity in institutional contexts and the wide set of tools and services that they provide to learners and teachers, they present several issues. Learning Management Systems are linked to an institution and a period of time, and are not adapted to learners' needs. In order to address these problems Personal Learning Environments are defined, but it is clear that these will not replace Learning Management Systems and other institutional contexts. Both types of environment should therefore coexist and interact. This paper presents a service-based framework to facilitate such interoperability. It supports the export of functionalities from the institutional to the personal environment and also the integration within the institution of learning outcomes from personal activities. In order to achieve this in a flexible, extensible and open way, web services and interoperability specifications are used. In addition some interoperability scenarios are posed. The framework has been tested in real learning contexts and the results show that interoperability is possible, and that it benefits learners, teachers and institutions.Peer ReviewedPostprint (author's final draft

Los catálogos de las Reliquias de la Catedral de Oviedo

Las reliquias de la catedral de Oviedo se describen y enumeran en dos conjuntos de fuentes medievales. La primera corresponde a finales del siglo XI y comprende el Acta de Apertura de 1075, la inscripción en el relicario conocido como Arca Santa y la epístola dirigida por el obispo Osmundus de Astorga a Ida de Boulogne. La segunda procede del scriptorium organizado en Oviedo por el obispo Pelayo, en el siglo XII. En este artículo se intenta analizar la secuencia de los diferentes relatos y cómo se relacionan entre sí.The relics of the Cathedral of Oviedo are described and listed in two sets of medieval sources. The first corresponds to the end of the 11th century and includes the Opening Act of 1075, the inscription in the reliquary known as the Arca Santa and the epistle written by Bishop Osmundus of Astorga to Ide de Boulogne. The second comes from the scriptorium organized in Oviedo by Bishop Pelayo, in the 12th century. In this article we try to analyze the sequence of the different stories and how they relate to each othe

Measuring Students Acceptance and Usability of a Cloud Virtual Desktop Solution for a Programming Course

[EN] Virtual desktops in cloud scenarios play a significant role in higher education. Nowadays, the idea of moving laboratories to the cloud seems mandatory and it is necessary to maintain students’ commitment in this new scenario. This paper aims at two targets, customizing a Virtual Desktop platform for delivering the laboratories of a programming course in a Computer Science Bachelor Degree and empirically apply the technology acceptance model and the system usability scale to a set of students that use it. Results obtained in this paper provide insights about the direct effect between the perceived ease of use, perceived usefulness, and attitude to technology following the technology acceptance model (TAM) as well as a comprehensive analysis of the system usability scale (SUS) of our platform.SIErasmus+ KA201 Strategic Partnership Project, Grant/Award Number: 2018-1-ES01-KA201-05093

Enhancement in corneal permeability of riboflavin using cyclodextrin derivates complexes as a previous step to transepithelial cross-linking

Corneal cross-linking has been described as an effective treatment to slow the progression of keratoconus. The standard protocol entails corneal epithelial removal to allow the diffusion of riboflavin into the stroma. Although, de-epithelization can generate risks or complications that transepithelial cross-linking tries to solve or avoid. Different formulations were developed after verifying that hydroxypropyl-β-cyclodextrin (HPβCD) and sulfobuthylether-β-cyclodextrin (SBEβCD) in a 20% concentration, increased the solubility of practically insoluble in water drugs such as riboflavin from 0.12 mg/mL to 0.35 mg/mL and 0.29 mg/mL respectively. These values were higher when chitosan and arginine were added to the formulation, showing solubility of 0.78 mg/mL when HPβCD concentration was not modified. Ex vivo corneal permeability was measured after having kept in contact bovine corneas with intact epithelium for 5 h with the 0.1 mg/mL riboflavin solution, the formulations developed and a reproduced nanoemulsion from another work. Riboflavin’s permeability was increased when cyclodextrins, chitosan, and arginine were part of the formulations, compared to the control drug solution. The best permeability coefficient was reached when riboflavin was combined with 40% (w/v) HPβCD, 0.5% (w/w) arginine, and 0.5% (w/w) chitosan. After having carried out toxicity studies as bovine corneal opacity and permeability (BCOP) and Heńs Egg Test - Chorioallantoic Membrane Test (HET-CAM) it was verified that both, the active ingredients and the excipients of the different formulations were not harmful without generating irritation, loss of transparency or corneal permeability alterations. The results show the great potential of the ocular developed solution for their use in transepithelial cross-linking for keratoconus treatmentS

Quality control on radiant heaters manufacture

An inspection process of radiant heaters is presented in this paper. The proposed non destructive testing and evaluation (NDT and E) technique for defect assessment of radiant heaters is based on infrared thermography images properly acquired and processed. The technique can be used in on-line fabrication quality control radiant heaters manufacturing processes. By exciting the heater with a very short electrical pulse, a sequence of thermographic images is captured by an infrared camera and then analyzed. Regardless of the electrical excitation applied to the heating element of the heater, the electrical power supplied will dissipate at the resistor. Provided enough spatial resolution, the heaters could be tested with an infrared camera capturing the radiated heat. The analysis of the heating wire during the heating flank shows differences among pixels corresponding to defective points and pixels belonging to non-defective areas of the wire. The automation is provided by the development of an algorithm that looks for the slope of the heating evolution of each pixel. A Radon Transform based algorithm is here proposed to reduce human intervention providing just one image where an operator could quickly locate possible defects

Automated skin lesion segmentation with kernel density estimation

Skin lesion segmentation is a complex step for dermoscopy pathological diagnosis. Kernel density estimation is proposed as a segmentation technique based on the statistic distribution of color intensities in the lesion and non-lesion regions.This work is supported by the “Ministerio de Economía, Industria y Competitividad” (MINECO) under projects DA2TOI (FIS2010-19860), SENSA (TEC2016-76021-C2-2-R), the “Instituto de Salud Carlos III” (ISCIII) through projects FUSIODERM (DTS15/00238) and CIBERBBN and the co-financed by FEDER funds