1,823 research outputs found

    Aesthetic effects on granite of adding nanoparticle TiO2 to si-based consolidants (ethyl silicate or nano-sized silica)

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    Considering that consolidant products are commonly used in the cultural heritage field and the titanium oxide nanoparticles (TiO2) have been used to develop photocatalyst films to induce self-cleaning property, the scientific research on consolidants doped with TiO2 is justified. However, the addition of TiO2 can affect to the physical properties of the cultural heritage object, questioning the adequacy of the procedure. In this paper, we evaluated the influence of nanoparticle TiO2 addition to two different commercial consolidant products (ethyl silicate or nano-sized silica) on the appearance and the color of a granite and the penetration through its fissure system. The stone was previously subjected to high temperature simulating the effect of a fire and the subsequent tap water jet to cool down. Therefore, different concentrations of nanocrystalline TiO2 (0.5, 1, and 3 wt %) were considered. The different compositions were also studied considering the compactness, the extent and the thickness of the superficial xerogel coating, and as well the penetration of the consolidant. The minimal TiO2 concentration tested (0.5 wt %) implied a low-medium risk of incompatibility as an intervention in cultural heritage field, because its low-medium potential as inducer of visible color changes of the granite surface. Regardless of the TiO2 content, the nano-sized silica induced surface xerogel coatings more compact and continue than those formed in the ethyl silicate coated surfaces. Higher penetration rates were identified in the granite treated with nano-sized silica colloidal solution, while ethyl silicate was only found in the first few µm. It was found that penetration could depend on the application procedure, the solvent of the consolidant and the silica particle size. The TiO2 addition reduced the penetration of the nano-sized silica consolidant.Ministerio de Economía y Competitividad | Ref. IJCI-2017-3277

    Medical treatment of superficial thrombophlebitis of the lower limb: heparin or anti-inflammatory?

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    Abstract: Objectives The objective of this review is to clarify the best treatment for superficial thrombophlebitis (ST) of the lower limb (LL), regarding nonsteroidal anti-inflammatory drugs (NSAIDs) and low-molecularweight heparin (LMWH). Data sources Pubmed database, evidence-based medicine websites, General Directorate of Health, Portuguese Association of General Practitioners, MGFamiliar.net, Index of Portuguese Medical Magazines. Review methods Research of clinical guidelines (CG), Systematic reviews (SR) and original studies using the MeSH terms: venous thrombosis; heparin, low-molecular-weight; anti-inflammatory agents. The search was limited to articles published between 2008 and 2011. Exclusion criteria were: repeated articles; ST during hospital admittance; ST not in the LL; pediatric ST; ST prophylaxis; Complicated ST; Risk factor related ST. American Family Physician’s Strength of Recommendation Taxonomy (SORT) was used to assess the level of evidence. Results 215 articles were obtained. We have selected one CG, two SR and one randomized clinical trial (RCT). Evidence supports that there is improvement in patients’ symptoms with ST treated with LMWH or NSAIDs compared with placebo, reducing the incidence of recurrences and complications, without differences in safety profile in the short term. The evidence also highlights the anticoagulation as first-line therapy. The simultaneous use of NSAIDs and LMWH showed greater efficacy in symptomatic relief than LMWH alone in a RCT. Conclusions LMWH and NSAIDs are the two options with evidence supporting its use as first-line treatment (SOR B). Anticoagulation for at least 4 weeks is indicated especially when severity criteria are identified (SOR B). More randomized clinical trials are needed, particularly regarding the choice between LMWH or NSAIDs or its’ simultaneous use, doses and treatment’s length

    Impacto económico y social a causa de la volatilidad en el precio de barril del petróleo en la economía ecuatoriana y el riesgo inminente ante productos sustitutos.

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    El trabajo llevado a cabo en este documento destaca un análisis profundo del impacto económico y social que hay en la economía ecuatoriana como resultado de la fluctuación en el precio del barril del petróleo. El trabajo analiza la situación actual en las finanzas públicas, el endeudamiento que actualmente tiene el país y como se puede cubrir dicha deuda a largo plazo para cumplir con las obligaciones ya adquiridas, y así mejorar paulatinamente el indicador riesgo país. De igual manera el trabajo señala la actual situación del sector privado tanto en la economía de las familias, como la liquidez de las empresas, y qué relación tiene la actual crisis con la baja de solicitud de créditos, pese a existir en los bancos fondos disponibles para otorgar préstamos. Finalmente se hace una breve investigación sobre el porvenir en la industria petrolera, los cambios que se están suscitando en la misma, de la mano con los sustitutos que van siendo desarrollados que amenazan al sector petrolero. Haciendo un compendio de todo lo anterior, se plasma sugerencias e ideas para superar estos problemas actuales y potenciales para el futuro del país con modelos político-económicos que direccionen al Ecuador por el camino correcto.The following document highlights a deep analysis about the social and economic impact that has arisen within the Ecuadorian economy as a result of the fluctuation of the oil price worldwide. The document also details the current situation in regards of the public finances, the public debt that the country has acquired and how will be able to cover such long term liabilities, in order to strengthen the name of the country overseas and upgrade our current country-risk ratio. Likewise, the document highlights the current problems within the private sector, both the Ecuadorian families and companies throughout the country, in regards of the available liquidity to acquire debt, how the amount of loans has decreased, despite the available funds in banks. Finally, a brief analysis on the future of the oil industry, the changes that have taken place within this industry, and the threat of new substitutes worldwide that eventually will make the oil market disappear. Doing a summary of all the points stated above, the document provide advices and suggestions in order to overcome the current and potential problems in our country, showing political and economic models to be followed which will put the country into the right path

    Key drivers for the adoption of circular economy practices in the tourist accommodation sector

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    Purpose – This article assesses the degree of adoption of the circular economy model in the tourist accommodation sector. Additionally, the study aims to understand whether the type of accommodation, size and year of construction or remodelling have an impact on the adoption of circular economy practices. Design/methodology/approach – The study is based on a survey administered to directors and owners of tourist accommodation facilities in Portugal. The questionnaire was developed based on an extensive literature review of circular economy practices in the accommodation sector. Findings – Accommodation companies currently operate in a linear economy model and are still in the early stages of transitioning to a more circular economic model. Among the most commonly implemented practices are those that represent expenditure savings for accommodation companies. The findings also suggest a growing awareness and commitment to sustainability and circular economy practices in the tourist accommodation sector, particularly in more recently constructed or renovated accommodation. Originality/value – To the best of the authors’ knowledge, this study is the first to evaluate the accommodation characteristics that impact the adoption of sustainability and circular economy practices in the tourist accommodation sector. It contributes to the literature by providing primary quantitative data supporting the adoption of such practices. Keywords Sustainability practices, Accommodation sector, Circular economy practices, Pairwise comparisons, Tourist accommodation characteristics Paper type Research paperinfo:eu-repo/semantics/publishedVersio

    Results of a feasibility randomised controlled trial of osteopathy on neck-shoulder pain in computer users

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    Computer use is a well-known source of chronic pain, leading to absenteeism and reduced productivity and well-being. This study evaluated the feasibility of conducting a full-scale randomised controlled trial. Several methodological variables defined trial feasibility. Of 77 participants interested, 30 were included and randomised into three groups of ten. All participants concluded the study, and all the data was analysed. The feasibility outcomes were deemed appropriate. No adverse events or severe side effects were reported or identified. Studying the efficacy of osteopathic consultation on computer users by conducting an RCT is feasible and safe. With adjustments, a full-scale study can be designed.info:eu-repo/semantics/publishedVersio

    Production of tγ, tZ and tH via Flavour Changing Neutral Currents

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    A Unique FeynRules Output (UFO) model describing general top quark Flavour Changing Neutral Currents is presented. We use it to study tg, tH and tZ production via FCNCs anomalous couplings at the Large Hadron Collider, in particular how the distributions of physical observables depend on the anomalous couplings. A sensitivity study of the Large Hadron Collider experiments to tZ production via FCNC in its second stage of operation is also performed.(undefined)info:eu-repo/semantics/publishedVersio

    Reverberar

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    107 p. : Tablas; il.Libro ElectrónicoLa presente publicación fue desarrollada en el marco del Máster Internacional de Comunicación y Educación del Gabinete de Comunicación y Educación-UAB y tiene por objeto divulgar aquellos contenidos estudiados, analizados e investigados dentro de las áreas disciplinares propuestas en el programa académico del mismo. Entendemos que el campo de la Comunicación y el de la Educación no se encuentran en la actualidad aislados sino que, fruto de la interdisciplinariedad, permiten el desarrollo de trabajos Educomunicativos. En este sentido, los textos publicados son el resultado de un proceso de aprendizaje basado en la reflexión de las problemáticas y tópicos propios de estos campos disciplinares. A su vez, tienen la intención de generar en el lector nuevos interrogantes del mundo Educomunicativo. De allí la expresión inicial de nuestra contraportada: “Aprender sin reflexionar es malgastar la energía”(Confucio).Introducción 5 Palabras Mentoras Sometimes i feel like reality... 7 El reto de “re-fundar” y “re-inventar” los medios. José Manuel Pérez Tornero 9 Tiempos difíciles donde todo es fácil. Santiago Tejedor Calvo 13 La inmensa capacidad de no atender. José María Perceval 19 Parte de esta historia. Walter Temporelli 23 Ciudadanía Activa y Alfabetización Mediática: relaciones básicas y posibilidades de desarrollo. Santiago Giraldo Luque 27 Presentación de proyectos audiovisuales. José Martínez Abadía 33 Sociedad de la Información y Sociedad del Conocimiento ...los problemas de Lázaro realmente empezaron... 37 A influência sobre o livre pensamento nas Universidades. Albanir Faleiros Machado Neto 39 Brevísima historia de la divulgación científica. Felipe Jaramillo Vélez 47 Del Circo al Carnaval. De la divulgación a la apropiación social del conocimiento. Felipe Jaramillo Vélez 51 Psicologia Educacional e Práticas Educativas mediadas pelas Tecnologias de Informação e Comunicação. Elisabete Álvarez Santos 57 Alfabetización Digital y Mediática …Lázaro disfrutaba como nunca antes... 63 Comunicação e Ócio - Uma via de mão única. Albanir Faleiros Machado Neto 65 En tiempos de crisis: reingeniería de los telediarios. Fernanda Tusa Jumbo 71 De la Videoclipzación al Mushup: implicancias en Comunicación y Educación. Natalia Scantamburlo 75 Medios y Tecnologías Educativas, Educación en Medios …En el principio estaba todo... 79 ¿Cómo formar en el contexto de la cultura actual de Internet a los jóvenes usuarios? Leticia Vázquez Méndez 81 Alicia en el País de las Maravillas 2010. Propuesta de actividad para una lectura crítica de cine. Azucena Rodríguez Ramírez 85 Proyectos y Talleres ...una cosa sí es segura, por ahora toca seguir viajando... 93 El cosmonauta: un modelo alternativo de producción y distribución cinematográfica. Simón Vilás Fernández 95 Sometimes I feel like abstract. Janet Velázquez 10

    Capital structure management differences in Latin American and US firms after 2008 crisis

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    Purpose – This paper aims to analyse the capital structure determining factors of Latin American and US corporations after the crisis of 2008, as a means of comparing theoretical assumptions and empirical results in markets of different efficiency levels. Design/methodology/approach – The study sample comprises 1,091 companies belonging to the six largest economies in Latin America plus the USA, in the years 2009 to 2013. The authors performed a regression with data from a balanced overview, which were obtained by using the criterion of minimum weighted square. Findings – The results demonstrated differences in determining factors of capital structure between companies from Latin America and from the USA. The pecking order theory was mostly observed in Latin American companies and the trade-off theory greater was closely aligned with US firms. Originality/value – This research brings new contributions to the issue, once the differences and determinative of the debt profile in companies from different economic contexts are compared.Propósito – Este artículo analiza los factores determinantes de la estructura de capital de las corporaciones latinoamericanas y estadounidenses después de la crisis de 2008, para comparar los supuestos teóricos y los resultados empíricos en mercados de diferentes niveles de eficiencia. Diseño/metodología/enfoque – La muestra del estudio comprende 1.091 empresas pertenecientes a las seis mayores economías de América Latina y Estados Unidos, entre los años 2009 y 2013. Se realizó una regresión con datos de una visión general equilibrada, que se obtuvo utilizando el criterio de cuadrado mínimo ponderado. Hallazgos – Los resultados muestran diferencias en los factores determinantes de la estructura de capital entre empresas de América Latina y de Estados Unidos. La Teoría de la selección jerárquica se observó principalmente en las empresas latinoamericanas y la Teoría del intercambio más cercana estaba estrechamente alineada con las firmas estadounidenses. Originalidad/valor – Esta investigación aporta nuevas contribuciones al tema, una vez que comparamos las diferencias y determinantes del perfil de la deuda en empresas de diferentes contextos económicos

    Prevalencia del síndrome de quemarse por el trabajo (burnout) en profesores de educación secundaria del I.E.S. José Manuel Blecua(Zaragoza, España).

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    El presente estudio tiene como objetivo evaluar la presencia de burnout en los docentes de educación secundaria del centro J.M. Blecua. A través del instrumento Maslach Burnout Inventory (MBI) se pretende obtener un medida de burnout presente para poder establecer una serie de relaciones con variables propias del individuo como: sexo, edad, estado civil, años en el centro, tipo de contrato o número de hijo. A su vez, se evalúan las variables que pueden estar contribuyendo en el proceso de burnout a través del Cuestionario Seis áreas de vida laboral (WAS). Un 70% de la muestra presenta burnout. La sobrecarga laboral y las recompensas son los principales predictores de los altos índices en energía, implicación y eficacia
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