Context Selection on Attributed Graphs for Outlier and Community Detection

Today\u27s applications store large amounts of complex data that combine information of different types. Attributed graphs are an example for such a complex database where each object is characterized by its relationships to other objects and its individual properties. Specifically, each node in an attributed graph may be characterized by a large number of attributes. In this thesis, we present different approaches for mining such high dimensional attributed graphs

El reto de vincular reputación online de destinos turísticos con competitividad

The aim of this study is to evidence how 2.0 conversations in social media impact the reputation of destinations. Additionally, the influence of co-creation practices is analysed. The five most competitive destinations worldwide have been chosen for the research. This paper demonstrates that monitoring social media is a challenge in tourism and is a strategic tool to support process decision making and for destination brand building in a sustainable way. Currently, there are several monitoring and analytic tools, but there is a lack of models to systematise and harness it for the Destination Management Organization (DMOs). In conclusion, how tourists play the main role in the competitiveness of Destinations with their experiences and opinions are considered, along with some keys for successful management of social media are given in the view of the results.info:eu-repo/semantics/publishedVersio

Theoretical and Experimental Study of the Friction Behavior of Halogen-Free Ionic Liquids in Elastohydrodynamic Regime

onic Liquids have emerged as effective lubricants and additives to lubricants, in the last decade. Halogen-free ionic liquids have recently been considered as more environmentally stable than their halogenated counterparts, which tend to form highly toxic and corrosive acids when exposed to moisture. Most of the studies using ionic liquids as lubricants or additives of lubricants have been done experimentally. Due to the complex nature of the lubrication mechanism of these ordered fluids, the development of a theoretical model that predicts the ionic liquid lubrication ability is currently one of the biggest challenges in tribology. In this study, a suitable and existing friction model to describe lubricating ability of ionic liquids in the elastohydrodynamic lubrication regime is identified and compared to experimental results. Two phosphonium-based, halogen-free ionic liquids are studied as additives to a Polyalphaolefin base oil in steel–steel contacts using a ball-on-flat reciprocating tribometer. Experimental conditions (speed, load and roughness) are selected to ensure that operations are carried out in the elastohydrodynamic regime. Wear volume was also calculated for tests at high speed. A good agreement was found between the model and the experimental results when [THTDP][Phos] was used as an additive to the base oil, but some divergence was noticed when [THTDP][DCN] was added, particularly at the highest speed studied. A significant decrease in the steel disks wear volume is observed when 2.5 wt. % of the two ionic liquids were added to the base lubricant

Las elecciones presidenciales de Estados Unidos desde la perspectiva de la prensa europea

Public relations strategies based on dramatization are key tools to achieving success in electoral campaigns. Press offices play a fundamental role as theatre directors, turning their leaders into great actors. What at first glance would look like a theatrical performance is, more than ever, what happened in the US presidential elections. Newspapers are intensifying the use of visual elements to reinforce the news. This research paper analyses 2,463 articles from eight digital newspapers in four countries to learn about the impact of visuals and dramatization on the European press. It seems paradoxical that the progressive newspapers devoted more articles to Trump than the conservative newspapers. A lack of time on the part of the journalists? What is certain is that the visuals prepared by Trump’s press office and his perfectly designed public appearances, were reproduced by the media. The study shows that the progressive newspapers analysed have contributed to giving Trump greater visibility in Europe

Aulas afectivas e inclusivas y bienestar adolescente: una revisión sistemática

El ambiente de aula percibido por los estudiantes incide de forma significativa en su aprendizaje y desarrollo de la personalidad. El profesorado puede contribuir a promover el bienestar adolescente y la inclusión a través del ambiente de aula. Los estudios sobre clima de aula, bienestar adolescente e inclusión en educación secundaria son minoritarios en comparación con los existentes en educación infantil y primaria. En este contexto, los objetivos de este trabajo son los siguientes: (a) analizar las relaciones entre un clima de aula afectivo e inclusivo con el bienestar adolescente; (b) sistematizar las competencias docentes más apropiadas para dinamizar la calidad afectiva e inclusiva del ambiente de aula en educación secundaria.            Para responder a los objetivos del estudio, se ha llevado a cabo una revisión sistemática de la literatura y se han seguido las directrices marcadas en la declaración PRISMA para revisiones sistemáticas científicas. Para la revisión metodológica, se evaluaron los artículos con la herramienta JBI Critical Appraisal Checklist for Qualitative Research. Se consultaron las bases de datos ERIC y Web of Science. El período de búsqueda comprendió desde 2016 a 2020.            La revisión se realizó sobre la base de 32 estudios seleccionados. Los resultados obtenidos ofrecen evidencias contrastadas del impacto de un ambiente afectivo e inclusivo de aula en el bienestar adolescente de educación secundaria. Asimismo, se demuestra el papel destacado del profesorado en la promoción de un ambiente amigable e integrador de aula y la necesidad de formación en competencias emocionales, interpersonales e interculturales. Se concluye que un clima de aula afectivo e inclusivo promueve no solo un desarrollo óptimo de la personalidad en la etapa de la adolescencia, sino que también impulsa la socialización en los valores de aprecio y respeto a la diversidad

Population dynamics and reproductive phenology of a harvestman in a tidal freshwater wetland

There is a great amount of ecological information for terrestrial arthropods in several types of habitats, but few studies have focused on populations living in tidal freshwater wetlands. During a two-year field survey, we studied the temporal dynamics of the harvestman Discocyrtus prospicuus inhabiting a freshwater wetland exposed to predictable tides and unpredictable floods. We also explored the effects of temperature, precipitation, and tide level on the population dynamics and reproductive phenology. Our findings are markedly different from those reported in other harvestman species living in different habitats and also from conspecific populations living in the mainland. Adults, subadults, and juveniles remain active throughout the year, and a long breeding season was observed. However, the number of adults, subadults, juveniles, and egg clutches showed clear variations over the year without a consistent seasonal pattern. Contrary to the general pattern in harvestmen, no climatic variables were significant predictors of abundance fluctuations. We discuss the potential masking effect of unpredictable flood events, obscuring the relationship between abundance and abiotic factors. In addition, given that climatic conditions seem to favor harvestmen activity throughout the year, we also hypothesized that abundance variations could be driven mainly by biotic rather than by abiotic interactions.Fil: Iglesias, Patricia Paola. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Pereyra, Martín Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Posadas; Argentin

The Lubrication Ability of Ionic Liquids as Additives for Wind Turbine Gearboxes Oils

The amount of energy that can be gained from the wind is unlimited, unlike current energy sources such as fossil and coal. While there is an important push in the use of wind energy, gears and bearing components of the turbines often fail due to contact fatigue, causing costly repairs and downtime. The objective of this work is to investigate the potential tribological benefits of two phosphonium-based ionic liquids (ILs) as additives to a synthetic lubricant without additives and to a fully formulated and commercially available wind turbine oil. In this work, AISI 52100 steel disks were tested in a ball-on-flat reciprocating tribometer against AISI 440C steel balls. Surface finish also affects the tribological properties of gear surfaces. In order to understand the combined effect of using the ILs with surface finish, two surface finishes were also used in this study. Adding ILs to the commercial available or synthetic lubricant reduced the wear scar diameter for both surface finishes. This decrease was particularly important for trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl) amide, where a wear reduction of the steel disk around 20% and 23% is reached when 5 wt % of this IL is added to the commercially available lubricant and to the synthetic lubricant without additives, respectively

Ionic Liquids as Additives of Coffee Bean Oil in Steel-Steel Contacts

Environmental awareness and ever-growing restrictive regulations over contamination have increased the need for more environmentally-friendly lubricants. Due to their superior biodegradability and lower toxicity, vegetable oils are a good alternative to replace currently-used mineral oils. However, vegetable oils show low oxidation and thermal stability and poor anti-wear properties. Most of these drawbacks can be attenuated through the use of additives. In the last decade, ionic liquids have emerged as high-performance fluids and lubricant additives due to their unique characteristics. In this study, the tribological behavior of two phosphonium-based ionic liquids is investigated as additives of coffee bean oil in steel-steel contact. Coffee bean oil-ionic liquid blends containing 1, 2.5, and 5 wt% of each ionic liquid are studied using a block-on-flat reciprocating tribometer and the test results are compared to commercially-available, fully-formulated lubricant. Results showed that the addition of the ionic liquids to the coffee bean oil reduces wear volume of the steel disks, and wear values achieved are comparable to that obtained when the commercially-available lubricant is used

Almacenaje de metales arqueológicos. Estudio de caso: El almacén del Museo Arqueológico de Sevilla

En la primera parte plantearemos las necesidades de conservación específicas del patrimonio metálico arqueológico y conoceremos el marco normativo existente y los criterios establecidos por la profesión para afrontar su conservación. En la segunda parte analizaremos el caso concreto del Almacén de Metales del Museo Arqueológico de Sevilla, examinando el contexto y valiéndonos del método plantaeado por Stefan Michalsky3 para evaluar riesgos. Por último, en la tercera parte, en base a los resultados obtenidos en el apartado anterior, propondremos una serie de mejoras prácticas para el Almacén de Metales del museo.Universidad de Sevilla. Grado en Conservación y Restauración de Bienes Culturale

El diseño de espacios en el cine de Wes Anderson

[Resumen] El cine y la arquitectura son dos artes que siempre han estado estrechamente relacionadas. Un buen ejemplo de esta relación es el cine de Wes Anderson que pone un especial y reconocido cuidado en el diseño de espacios, así como en la selección de los objetos y de los colores, que actúan como reflejo de los personajes que los habitan. Su estilo como cineasta se sustenta en un exhaustivo trabajo de dirección artística que da lugar a un resultado visual muy característico basado en una marcada simetría, una gama cromática limitada y específica para cada película, y un obsesivo cuidado por el detalle. Todo ello se explicita a través de un lenguaje visual propio, que muestra los mundos andersonianos desde una perspectiva única.[Abstrect] Cinema and architecture are two arts that have always been closely related. A good example of this relationship is the Wes Anderson’s cinema that puts special and recognized care in the design of spaces, as well as in the selection of ob jects and colors, which act as a reflection of the characters that inhabit them. His style as a filmmaker is based on an exhaustive work of artistic direction that gives rise to a very characteristic visual result based on a marked symmetry, a limited and specific chromatic range for each film, and an obsessive care for detail. All this is made explicit through a visual language of its own, which shows the Ander sonian worlds from a unique perspective.[Resumo] O cine e a arquitectura son duas artes que sempre foron estreitamente relacio nadas. Un bo exemplo desta relación é o cine de Wes Anderson que pon un especial e recoñecido coidado no deseño de espazos, así como na selección dos obxectos e as cores, que actúan como reflexo dos personaxes que os habitan. O seu estilo como cineasta susténsase nun exhaustivo traballo de dirección artística que dá lugar a un resultado visual moi característico baseado nunha marcada simetría, unha gama cromática limitada e específica para cada película, e un obsesivo coidado polo detalle. Todo iso explicitouse a través dunha linguaxe visual propia, que mostra os mundos andersonianos dende unha perspectiva única.Traballo fin de grao (UDC.ETSA). Estudos en arquitectura. Curso 2017/201