Los falsos sagunt de las fuentes árabes

En fechas recientes he dedicado varios trabajos a estudiar el topónimo valenciano Morvedre 1, nombre antiguo de la actual Sagunto. Esto me ha llevado a replantearme el problema de la identificación y localización de los hipotéticos «Sagunto» que aparecen en las fuentes árabes al narrar sendas revueltas acaecidas en los años 172/778-789 y 317/929-930. Mi punto de partida se sigue basando en el hecho de que la existencia de un doblete Sagunto-Morvedre sería un insólito caso andalusí de uso simultáneo de dos denominaciones romances; una de ellas, además, ofrecería grafías dispares en las crónicas (Š gnt, Bs ‘t en 172; Smgws, Šgwns en 317). Por otro lado, en la descripción de al-Andalus de al-R z (m. 344/955) se llama al lugar Morvedre, nunca Sagunto. Me ocuparé del tema ahora para ofrecer nuevas propuestas, distintas a las que presenté en su día para localizar esos lugares

Evaluación del sistema de registro y notificación de casos de VIH en Nicaragua del 1 de Enero al 31 de Diciembre del 2009.

Estudio descriptivo, retrospectivo de corte transversal. Se encontró que de nivel local a nivel regional existe un subregistro hasta el 34% de los casos. Del nivel regional al CNDR se determinó un subregistro hacia el nivel central hasta del 35%, lo que refleja una debilidad en el seguimiento de casos y de diagnóstico. Del nivel central se estableció un subregistro del 48% hacia vigilancia epidemiológica del componente de VIH

L'historiador Chabàs i el passat islàmic valencià.

Barcelo Torres, M.Carmen - E-mail @uv.es: privado (a solicitud del interesado

Generation of heterogeneous cellular structures by sonication

Many materials require functionally graded cellular microstructures whose porosity (i.e. ratio of the void volume to the total volume of a material) is engineered to meet specific requirements and for an optimal performance in diverse applications. Numerous applications have demonstrated the potential of porous materials in areas ranging from biomaterial science through to structural engineering. Polymeric foams are an example of a cellular material whose microstructure can be considered as a blend of material and nonmaterial zones. While a huge variety of foams can be manufactured with homogenous porosity, for heterogeneous foams there are no generic processes for controlling the distribution of porosity throughout the resulting matrix. Motivated by the desire to create a flexible process for engineering heterogeneous foams, this work has investigated how ultrasound, applied during some of the foaming stages of a polyurethane melt, affects both the cellular structure and distribution of the pore size. After reviewing the literature concerning foam chemistry, ultrasound and sonochemistry, series of experiments were performed that used an ultrasonic field created by a sonotrode irradiating in a water bath containing a strategically placed vessel filled with foaming reactants. Prior to this, the acoustic field in the bath had been accurately mapped so that the acoustic pressure conditions within the foam container were known. During the foam polymerisation reaction, the acoustic pressure in the water bath varied causing the bubbles to pulsate in a state of ‘stable cavitation’ (i.e. rectified diffusion). This pulsation of the bubbles pumped gas from the liquid to the gas phase inducing them to increase in volume. The eventual solidification resulted in a porous material with a cellular structure that reflected the acoustic field imposed upon it. The experimental results revealed how the parameters of ultrasound exposure (i.e. frequency and acoustic pressure) influenced the volume and distribution of pores within the final polyurethane matrix: it was found that porosity varies in direct proportion to both the acoustic pressure and the frequency of the ultrasound signal. The effects of ultrasound on porosity demonstrated by this work offer the prospect of a manufacturing process that can control and adjust the cellular geometry of foam and hence ensure that the resulting characteristics of the heterogeneous material match the functional requirements.Engineering and Physical Sciences Research Council (EPSRC)Neilson Endowment Fund, in the Department of Mechanical Engineerin

Untitled: Figurations of memory

The next pages will describe my experience and results of making connections between cognitive sciences and art; the transformations of my memories being the object of study and motivation for this process of self-discovery. The human body reacts according to innumerable neural functions and external stimuli. Neurons respond to the evocation of experienced events, building virtual images, map-like constellations sometimes fulfilled by imagination, desires or knowledge promoting in this way their constant reshaping. This document offers an insight into my recollections as matter. As matter these recollections take on different states and I hope to give you a better sense of my personal voice using my experience with glass to explore this transformation and accompanying my journey with lectures and scientific readings about the mind functions

Metal Accumulation by Jatropha curcas L. Adult Plants Grown on Heavy Metal-Contaminated Soil

Jatropha curcas has the ability to phytoextract high amounts of heavy metals during its first months just after seeding. Notwithstanding, there is scarce information about metal uptake by adult J. curcas plants. To shed light on this issue, 4-year-old J. curcas L. plants were planted in a soil mixture of peat moss and mining soil (high metals content), and the biomass growth and metal absorption during 90 days were compared with those of plants growing in peat moss. The main metal found in the mining soil was Fe (31985 mg kg-1) along with high amounts of As (23717 mg kg-1). After the 90-day phytoremediation, the plant removed 29% of Fe and 44% of As from the soil mixture. Results revealed that J. curcas L. translocated high amounts of metals to its aerial parts, so that translocation factors were much higher than 1. Because of the high translocation and bioaccumulation factors obtained, J. curcas L. can be regarded as a hyperaccumulator plant. Despite the great capacity of J. curcas L. to phytoremediate heavy-metal-contaminated soils, the main drawback is the subsequent handling of the metal-contaminated biomass, although some potential applications have been recently highlighted for this biomass.University of Seville (VIPPIT-2019-I.5

Identification of value added services from intelligent transportation systems using concept maps technique

El desarrollo de la tecnología aplicada a los sistemas de transporte ha desarrollado un nuevo campo de investigación: los Sistemas Inteligentes de Transporte, permitiendo la aplicación y control de la información electrónica en el transporte. La evaluación de sus aspectos socioeconómicos es particularmente importante para las decisiones políticas gubernamentales a la hora de desarrollar pautas de evaluación apropiadas para los proyectos de los sistemas inteligentes de transporte (Zhang et al., 1996). Sin embargo, la mayoría de estas guías no detallan cómo deberían ser medidos, valorados, o al menos, definidos sus impactos. Las metodologías más utilizadas a la hora de evaluar estos impactos socio-económicos son los análisis coste-beneficio (CBA), los análisis de efectividad del coste y las aproximaciones multi-criterio tales como el análisis envolvente o análisis de la frontera (DEA). Así pues, si bien son muchos los trabajos a partir de los que es posible identificar el rango de beneficios potenciales sin recurrir a la utilización de los costes en los proyectos ITS, no obstante, y desafortunadamente también, los resultados alcanzados son a menudo difíciles de comparar dado que los diferentes proyectos existentes adoptan distintas pautas de acción y de evaluación de los costes y los beneficios (Zhicai et al., 2006). Cabe mencionar también que los beneficios típicos de la implantación de Sistemas Inteligentes de Transporte están relacionados con los servicios de valor añadido que conlleva el empleo de las nuevas tecnologías. Esta investigación pretende utilizar una nueva perspectiva a la hora de valorar los Sistemas Inteligentes de Transporte, al utilizar, no una perspectiva de coste-beneficio, sino una perspectiva estratégica., pretendiendo, en cierta medida, que los resultados obtenidos sirvan de guía para futuras comparaciones de estos sistemas. Con todo esto en mente, el objetivo inicial ha sido identificar los servicios de valor añadido que la aplicación de los Sistemas Inteligentes de Transporte pudiera ofrecer. Para ello hemos hecho uso de una herramienta científica, basada en el proceso de elaboración de los Mapas conceptuales. Los resultados obtenidos nos han permitido identificar seis servicios de valor añadido a tener en cuenta al tratar estos sistemas. Dichos servicios se podrían englobar en tres grandes áreas: Información, Seguridad y Gestión. De igual forma, se ha podido constatar también que aquellos servicios referidos a la mejora de la seguridad y al acceso de información sobre el tráfico son los más valiosos, en contraposición a aquellos referidos a información sobre puntos de interés, resultado, este último, consecuente con los obtenidos por Adler & Blue (1998) en investigaciones previas. Este trabajo propone una clasificación de los servicios de valor añadido que estos sistemas pueden ofrecer, con el fin de facilitar sus evaluaciones y comparaciones futuras. La carencia en el ámbito de la evaluación y comparación de estos sistemas justifica la originalidad de este trabajoA new research area is appearing because of the development of the technology applied to transport systems. This new area is called: Intelligent Transportation Systems (ITS). Electronic information is applied and controlled in transport systems. The assessment of the socio-economic aspects is important for governments’ public decision-making when developing guides for evaluating ITS projects (Zhang et al., 1996). However, most of these guides do not specify the way in which the impacts should be measured, assessed or even defined. The most used methodologies have been Cost-Benefit Analysis (CBA), Cost Effectiveness Analysis, and multicriteria approaches such as Development Efficiency Analysis (DEA). Although there are too much researches through which the potential benefits could be identified without using costs rates in ITS projects, their results are sometimes difficult to compare because of the use of different guides to assess costs and benefits (Zhicai et al., 2006). The usual benefits derived from ITS refer to the value added services of these new technologies. Our research make use of a strategic view to assess ITS, instead of a cost-benefit view, in order to make easier the comparison among these systems. The main objective of this research is to identify the value added services that ITS could offer. We have made use of Concept Maps Technique to achieve this objective. Six value added services when working with these systems have been identified. These can be grouped into three regions: Information, Security & Safety, and Management. Moreover, those services referring to safety and to accessing to information on traffic are more valuable than those referring to security and information on point of interests. This result coincides with those from Adler & Blue (1998). This research proposes a classification of the value added services that these systems could offer in order to make easier future evaluations and comparisons. The scarcity in this area is what justifies the originality of this research

Topological properties of the core group in online communities

Online communities are self-organized networks with a clear core-periphery structure, where most of the contributions are due to a small group of users known as the core group. Although several methods for detecting the coreperiphery structure have been proposed, all of them assume a pre-defined structure of the core group. However, online communities exhibit a wide variety of organizations and shapes, and the patterns of behavior of the core group is continuously changing. This paper investigates the relationship between the global parameters of the community and those of the core group. Findings reveal that the behavior of the core group determines the global structure of the community and therefore, the identification of the core group should consider the global characteristics of the network in which they are contributing

A study of global and local visibility as web indicators of research production

The concept of webpage visibility is usually linked to search engine optimization, and it is based on global in-link metric, that is, the number of received links from other websites, but without considering the sources of these links. The purpose of this article is to demonstrate that this global idea of visibility is only weakly correlated with web metrics measured over a network of related institutions or organizations (local visibility) and research production. As a case study, global and local visibility measurements have been obtained for a set of Spanish Universities, and they have been correlated with results provided by international rankings like the Webometrics Ranking of World’s Universities and the Academic Ranking of World Universities by Shanghai Jiao Tung University. Obtained results suggest that the development of web indicators to be included as part of Universities evaluation programs should consider a local idea of visibility, considering a certain geographical context or similar related institution