Tracking Federated Queries in the Linked Data

Federated query engines allow data consumers to execute queries over the federation of Linked Data (LD). However, as federated queries are decomposed into potentially thousands of subqueries distributed among SPARQL endpoints, data providers do not know federated queries, they only know subqueries they process. Consequently, unlike warehousing approaches, LD data providers have no access to secondary data. In this paper, we propose FETA (FEderated query TrAcking), a query tracking algorithm that infers Basic Graph Patterns (BGPs) processed by a federation from a shared log maintained by data providers. Concurrent execution of thousand subqueries generated by multiple federated query engines makes the query tracking process challenging and uncertain. Experiments with Anapsid show that FETA is able to extract BGPs which, even in a worst case scenario, contain BGPs of original queries

Revisión sistemática sobre la eficacia de la heparina sódica para mantener la permeabilidad de los accesos venosos

Trabajo fin de grado en EnfermeríaObjetivo: esta revisión sistemática pretende evaluar la eficacia de la heparina sódica para mantener permeable un acceso venoso, ya sea en una vía venosa periférica o en una vía venosa central, tanto en pacientes adultos como en niños. Método: se han realizado búsquedas bibliográficas en lenguaje controlado (términos MeSH y DeCS) y en texto libre en PubMed, BVS, CINAHL, Cochrane, SciELO, Scopus y Clinical trials, utilizando como criterios de inclusión que fueran ensayos clínicos aleatorizados que comparasen la eficacia de la heparina con la del suero salino en accesos venosos. Resultados: Se encontraron 10 ensayos clínicos que cumplían los criterios de inclusión: 3 de ellos en catéteres venosos centrales, tanto en población adulta como en niños, y 7 en vías venosas periféricas, 2 de ellos en población adulta, 2 en niños y 3 en neonatos. De estos 10 ensayos, utilizando como criterio la duración del catéter o la obstrucción del mismo, 4 demuestran la mayor eficacia de la heparina frente al suero salino para permeabilizar un acceso venoso periférico, mientras que los otros 6 demuestran que el suero salino es igual de eficaz que la heparina para mantener permeable una vía. Conclusión: La mayoría de los estudios muestran que el suero salino es igual de eficaz que dosis bajas de heparina como solución para permeabilizar accesos venosos. Si bien cuatro de los ensayos utilizados en esta revisión demuestran la mayor eficacia de la heparina frente al salino, no existe suficiente evidencia que respalde su uso en el mantenimiento de catéteres venosos, por lo que se recomienda mayor investigación sobre la eficacia de la heparina o sobre fármacos alternativos para permeabilizar catéteres venosos.Aim: This systematic review aims to evaluate the efficacy of heparin to maintain the patency of a venous access, whether it is a peripheral catheter or a central catheter, both in children and adults. Methods: A bibliographic research was carried out with MeSH and DeCS terms and free-text language in PubMed, BVS, CINAHL, Cochrane, SciELO, Scopus and Clinical trials using as inclusion criteria for the results to be randomized clinical trials comparing the efficacy of heparin and sodium chloride in venous accesses. Results: 10 clinical trials were found that met the inclusion criteria: 3 of them on central venous accesses, both in children and adults; 7 of them on peripheral catheters: 2 of them in adults, 2 in children and 3 in neonates. Of these 10 trials, whether using as criteria the duration of the catheter or the occlusion of it, 4 of them prove that heparin is more effective than sodium chloride to maintain the patency of a venous peripheral access, while 6 of the trials show that sodium chloride is as effective as heparin to maintain patency of a catheter. Conclusion: Most of the trials show that saline is as effective as a low dose of heparin to maintain the patency of venous accesses. Although 4 of the trials used in this review show the more efficacy of heparin compare to saline, there is not enough scientific evidence that supports its use in the maintenance of venous catheters, so more investigation is recommended about the efficacy of heparin or about alternative drugs to maintain patency in venous catheters

D.3.1 – Privacy Breach Scenarios in SocioPlug

GDD_HCERES2020In SocioPlug, we have particular concerns about data protection. Services proposed by SocioPlug will conform to European regulations, during personal data collection and data access. In particular the right to oblivion, collection and access purposes should be explicitly determined by data owners. SocioPlug’s architecture is fully distributed and has no centralized server, thereafter, there is no centralized control about data and applications of users. The goal is to avoid the existence of a “big brother” vigilating every person of the social cloud. Nevertheless, collaboration implies accessing personal data of other users. As services and data will be distributed in a social cloud, participants must be responsible of their data but also of other’s data they collect and use. Thus, they must define usage policies for each shared data and people that collects and uses other’s data must preserve stated policies.From application scenarios described in deliverable D.4.1, in this report, we identify some important privacy breach scenarios that may appear in SocioPlug

A dynamic analysis of the effect of social security reform on Spanish widow pensioners

This paper shows the dynamic effects of the reform of the Spanish social security pension system on the pensions received by one of the most vulnerable groups of the population, namely, widows. We undertake a duration analysis to account for the effects of reform over time. We study the effects on the widows’ overall financial welfare in terms of the evolution of their risk of poverty. We show that the combined effects of the measures to be implemented will have a positive impact; that is to say, the risk of poverty diminishes with respect to the current financial situation of the widows. However, the risk of poverty increases as the pensioners get older

How can digital help biotherm growing in the Portuguese selective skincare channel?

Branding La

Personal Linked Data: A Solution to Manage User's Privacy on the Web

National audienceWhile using modern applications, personal digital data is spread over hundreds of servers all around the world and users have very poor control over these data. To tackle this issue, based on the semantic Web, we are developing a framework, named Privacy-Lookout, to allow people to be on the lookout for transgressions of their personal data privacy. Concretely, we propose to construct a personal linked data view of individuals to organize and semantically enrich the meta information of their personal data existing in the Web. The mean idea is to allow users to know if the information the Web posses about them respects their privacy principles. This paper introduces the first ideas of such approach

La pobreza energética en mujeres rurales mexicanas: el adobe como tecnología sustentable

La relevancia de este estudio radica en la convicción de que los esfuerzos de apoyo al desarrollo rural, en especial a los millones de personas que viven en condiciones de pobreza extrema en México, deben orientarse, al acceso limpio, accesible y sustentable de energía como un factor que puede propiciar el desarrollo económico y la reducción de la pobreza. Esta es una investigación con perspectiva de género, orientada hacia el desarrollo rural a partir del diseño, cuyo objetivo es implementar tecnologías sustentables para la obtención de energía. La metodología contempla, trabajo etnográfico con visitas de campo, registros fotográficos y entrevistas a profundidad en tres comunidades de extrema pobreza del Estado de México. La investigación presenta un análisis de las opciones más viables para la obtención de energía sustentable, dando como resultado la utilización de adobe en la construcción de estufas o fogones y diseños más eficientes

Evaluating WUW, a service to enhance users' satisfaction in Content-Based Peer-to-Peer Networks

International audienceNowadays, Peer-to-Peer (P2P) architectures are becoming more popular in content delivery applications thanks to their valuable characteristics as scalability, performance and low maintenance costs. In those systems, peers share their resources automatically (bandwidth, storage, etc.) and not only download content but also upload content to other peers organized in a neighbourhood. Each peer' neighbourhood is based basically on QoS-related parameters (available bandwidth, number of connections, etc.) and the amount of exchanged content. We consider that peers are under control of users that are autonomous and free persons having rights, preferences and interests. As users' resources are the richness of P2P systems, we think it is important to satisfy their preferences beyond the QoS. In this paper we present first experimental results of WUW (What Users Want), a service located on top of a P2P layer and proposed to satisfy users' preferences during content exchange. In the current implementation we use the BitTorrent protocol for measuring to which extent users' preferences influence the P2P behaviour when WUW is used. We describe how the experimental scenarios are built using the resources provided by Grid'5000. Our preliminary results are encouraging because they show a low overhead of WUW on the global content sharing performance

Construction of meanings related to violent contents of video games in children aged 11 to 14

Este estudio forma parte de la línea de investigación Violencia y medios de Comunicación de la Facultad de Psicología de la Uiversidad de la Sabana. Se propuso como objetivo conocer los significados que construyen los niños frente a los contenidos violentos de los videojuegos. Los participantes fueron cuatro niños de 11 a 14 años de edad de dos colegios públicos del municipio de Chía (Colombia). Se utilizó un método de carácter descriptivo explicativo con enfoque cualitativo. La estrategia empleada fue el estudio de caso único en donde a partir de la narrativa de los participantes se analizaron los significados que construyen frente a temas como el reconocimiento de la violencia, la percepción del conflicto y la resolución del mismo, la identidad de género, la relación entre familia y videojuegos, y el poder en los videojuegos. La información fue recogida a través de grupos focales, y analizada a partir de la propuesta de Strauss y Corbin. (2002). Los resultados obtenidos demuestran que existe relación entre los contenidos violentos de los videojuegos y la construcción de significados que realizan los participantes del grupo focal, lo que señala la influencia que tienen los videojuegos como generadores de valores, creencias y significados en los niños.This project was part of the research line entitled Violence and the Media developed by the Faculty of Psychology of the Universidad de la Sabana. , The aim of the study was to enquire about the meaning that children give to violent contents of videogames. Participants were four children between the ages of 11 and 14, who attended public schools in the village of Chía (Colombia). The research had a qualitative approach and used a descriptive-explanatory method, adopting the single-case study strategy. Based on the participants narratives an analysis was made of the meanings that children gave to topics such as recognition of violence, conflict perception, conflict resolution, gender identity, relationship between family and videogames and the power of videogames. Data were collected through the use of Focus Groups and analyzed according to Strauss and Corbin s theory (2002). Results show that there is a relationship between the violent contents of videogames and the meaning given to them by the participants in the focus group. This underlines the influence that videogames have on the development of values and beliefs in children

Low molecular weight fatty acids removal from Cocoa butter

Bolivian cocoa beans butter has had problems of sour flavorand smell that inhibited its possibilities of being sold in internationalmarkets. An hypothesis following a Strecker type kinetics was postulated forthe formation of low molecular weight fatty acids which were deemedresponsible for these unwanted properties. Since the formation of theseorganic acids has probably an origin in the improper handling of the beansby the farmers, and since no alternative source of raw materials was available,a process modification was proposed to deal with these problems. An acidbase neutralization reaction using concentrated solutions of potassiumcarbonate involving several mass transfer steps is proposed as a mechanismfor a process developed to remove low molecular fatty acids from cocoabeans butter. The removal of these acids greatly improved the product’sflavor and its physical properties including a narrowing of the band ofmelting points. The experimental data was well correlated only after theconsideration of dead zones in the model proposed. The process modificationincluding a steam jacketed reactor devoted to the neutralization reactor isunder way