Los weblogs y su aplicación como recurso didáctico

La difusión que están teniendo los weblogs o blogs en la red los hace ser merecedores de ocupar un puesto destacado junto con otras herramientas mucho más conocidas como pueden ser los foros, el correo electrónico o el chat. Los weblogs son páginas personales, organizadas de forma cronológica, que permiten la difusión e intercambio de ideas entre usuarios de la red, pero con formatos atractivos desde el punto de vista tecnológico, proporcionado en muchos casos por herramientas que facilitan su desarrollo sin tener que preocuparse de la forma de implementarlos. Se analizan sus características, sus orígenes, su evolución hasta nuestros días, sus utilidades e inconvenientes y sus principales núcleos temáticos. Un punto aparte merecen las variantes y herramientas relacionadas con ellos. Una vez conocidas las particularidades de los blogs, se pasa a describir y desarrollar un caso práctico de creación y gestión en uno de los principales proveedores de estos servicios. La última parte del artículo analiza su potencial como recurso didáctico, estudiando las distintas aplicaciones que pueden tener en distintos niveles del sistema educativo y las ventajas que pueden aportar en cada caso.Eje: TIC, flexibilización, trabajo colaborativoRed de Universidades con Carreras en Informática (RedUNCI

Los weblogs y su aplicación como recurso didáctico

La difusión que están teniendo los weblogs o blogs en la red los hace ser merecedores de ocupar un puesto destacado junto con otras herramientas mucho más conocidas como pueden ser los foros, el correo electrónico o el chat. Los weblogs son páginas personales, organizadas de forma cronológica, que permiten la difusión e intercambio de ideas entre usuarios de la red, pero con formatos atractivos desde el punto de vista tecnológico, proporcionado en muchos casos por herramientas que facilitan su desarrollo sin tener que preocuparse de la forma de implementarlos. Se analizan sus características, sus orígenes, su evolución hasta nuestros días, sus utilidades e inconvenientes y sus principales núcleos temáticos. Un punto aparte merecen las variantes y herramientas relacionadas con ellos. Una vez conocidas las particularidades de los blogs, se pasa a describir y desarrollar un caso práctico de creación y gestión en uno de los principales proveedores de estos servicios. La última parte del artículo analiza su potencial como recurso didáctico, estudiando las distintas aplicaciones que pueden tener en distintos niveles del sistema educativo y las ventajas que pueden aportar en cada caso.Eje: TIC, flexibilización, trabajo colaborativoRed de Universidades con Carreras en Informática (RedUNCI

Bibliometric mapping of the trends and contributions of scientific publications to risk and crisis communication regarding South America

Risk and crisis communication (R&CC) are crucial elements of managing vulnerability to big threats. This paper aims to explore the trends and contributions of scientific publications to R&CC about South America. Through the examination of 330 papers listed in the Web of Science database, the current study conducted a thorough overview between 1998 (oldest study) and 2021 (cut-off date) of bibliometric networks (keyword co-occurrence map, co-authorship maps, and author co-citation map) and multivariate statistical models (principal component analysis, compositional linear model). We address main communication factors, links between communication factors and countries, main academic cooperation networks, determinants of publication trends, and most cited authors. 28 R&CC factors were mapped and their relative importance to various hazards was examined. Most of these factors were intended to strengthen the communication system and increase risk knowledge of vulnerable people. Chile, Colombia, and Ecuador were mostly focused on strengthening R&CC. Brazil and Argentina were best represented with health and exposure to pollutants communication. Publications on R&CC are determined by the level of wealth, tourist arrivals, and the number of people affected by disasters. The compositional analysis revealed that the behavior of publications determinants could have opposite tendencies depending on the threats’ multidimensionality. To the best of our knowledge, this is the first R&CC study on South America to use CoDA in a bibliometric analysisPostprint (published version

Experimental investigation and model validation of a CaO/Ca(OH)2 fluidized bed reactor for thermochemical energy storage applications

The CaO/Ca(OH)2 hydration/dehydration chemical loop has long been recognized as a potential candidate for application in energy storage systems for concentrated solar plants. However, the technology still remains at a conceptual level because little information has been published on the performance of the key reactors in the system. In this work, we experimentally investigate the hydration and dehydration reactors in a 5.5 kWth batch fluidized bed reactor, in conditions relevant to larger systems (superficial gas velocities of up to 0.53 m/s, temperatures of up to 500°C for dehydration, input H2O(v) fractions between 0 and 0.8 etc.). Furthermore, to assist in the interpretation of the experimental results, a standard 1D bubbling reactor model has been formulated and fitted to the experimental results by including kinetic information at particle level independently measured in a thermogravimetric apparatus. The results indicate that the hydration reaction is mainly controlled by the slow kinetics of the CaO material tested while significant emulsion-bubble mass-transfer resistances were identified during dehydration due to the much faster dehydration kinetics.The financial support provided by the European Commission under the 7th Framework Program (StoRRe Project GA 282677) is acknowledged. Y.A. Criado thanks the Government of the Principality of Asturias for a Ph.D. fellowship (Severo Ochoa Program).Peer reviewe

Guidelines for Accessibility to Microblogging: an Integral Approach

Microblogging is one of the most popular user-generated media, hence its accessibility has a large impact for users. However, the accessibility of this medium is poor in practice, due to the combination of bad practices by different agents ranging from the providers that host microblogging services to prosumers that post contents to them. Here we present an accessibility-oriented model of microblogging services, analyze the impact of its components, and propose guidelines for each of them to meet accessibility requirements. In particular, we base on an study we have performed on Twitter, one of the most-relevant microblogging platform, to identify good and bad practices in microblogging content generation regarding accessibility in microblogging content generation

Continuous CaO/Ca(OH)2 Fluidized Bed Reactor for Energy Storage: First Experimental Results and Reactor Model Validation

This document is the Accepted Manuscript version of a Published Work that appeared in final form in Industrial and Engineering Chemistry Research, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/acs.iecr.6b04105Novel thermochemical energy storage systems that employ fluidized beds of CaO/Ca(OH)2 for hydration/dehydration reactions are under development because of the inherent advantages of the low cost of the materials and their relatively high temperature operation windows (450 °C–550 °C). We report in this work the results of the first steady state experiments conducted in a new pilot plant designed to test the concept under realistic reactor conditions. The pilot has a fluidized bed reactor with an internal diameter of 0.108 m and a height of 780 mm fed continuously with gas and solids as well as heat exchangers to supply/extract the required reaction heat. The experimental results during dynamic and steady state periods were fitted to a KL reactor bubbling bed model, using kinetic parameters from thermogravimetric studies and a single crossflow factor. The resulting continuous reactor model will serve as useful tool for the continued scaling up of this technology.Financial support provided by the European Commission under the 7th Framework Program (StoRRe Project GA 282677) is acknowledged.Peer reviewe

Potential Use of Wild Einkorn Wheat for Wheat Grain Quality Improvement: Evaluation and Characterization of Glu-1, Wx and Ha Loci

Wild einkorn (Triticum monococcum L. ssp. aegilopoides (Link) Thell.) is a diploid wheat species from the Near East that has been classified as an ancestor of the first cultivated wheat (einkorn; T. monococcum L. ssp. monococcum). Its genome (Am), although it is not the donor of the A genome in polyploid wheat, shows high similarity to the Au genome. An important characteristic for wheat improvement is grain quality, which is associated with three components of the wheat grain: endosperm storage proteins (gluten properties), starch synthases (starch characteristics) and puroindolines (grain hardness). In the current study, these grain quality traits were studied in one collection of wild einkorn with the objective of evaluating its variability with respect to these three traits. The combined use of protein and DNA analyses allows detecting numerous variants for each one of the following genes: six for Ax, seven for Ay, eight for Wx, four for Gsp-1, two for Pina and three for Pinb. The high variability presence in this species suggests its potential as a source of novel alleles that could be used in modern wheat breeding