1,721,187 research outputs found
Environmental impacts evaluation of treated copper tailings as supplementary cementitious materials
No full textSupplementary Cementitious Materials (SCMs) have been researched to improve properties of concrete, including environmental indicators. Copper Treated Tailings (TT) have shown a promissory use as SCM but need of mechanical and thermal treatment has an impact on their environmental performance. The impact of the use of SCMs on the mechanical properties mixtures and environmental indicators needs to be considered into the calculations, such as the mechanical performance decrease and the leaching of some potentially harmful elements from the mixture. This study calculates the environmental impacts of the use of TT as SCM. Three scenarios are evaluated: equivalent mechanical performance at the same water-to-cementitious (w/c) ratio, maximum mechanical performance, and maximum allowable replacement level (i.e. minimum allowable mechanical performance). To achieve each level of mechanical performance, different replacement levels were tested for mixtures with TT, and different w/c ratios were tested for mixtures without TT, at a constant water level to vary only the binder content. Results show that at higher mechanical performance TT mixtures show better environmental indicators than mixtures without TT. In the case of TT mixtures with lower mechanical performance, environmental benefits of the use of TT shows a decrease in environmental indicators of concrete with TT. It is concluded that considerations need to be made on the properties of the SCM for a proper comparison of concrete mixes. Avoided impacts and the relative contribution of cement depending on the performance and level of replacement are also important considerations to be made for a proper environmental comparison
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Plan de negocios para venta de sistemas de cultivos hidropónicos automatizados Intelligent Garden
Get PDFTesis para optar al grado de Magíster en AdministraciónVaras, Sebastián [Parte I], Vargas, Felipe [Parte II]Intelligent Garden surge como respuesta a las necesidades de una sociedad moderna que dentro de sus valores fundamentales busca la sustentabilidad, el diseño y el cuidado del medio ambiente.
Ante los factores descritos, la empresa busca entregar a sus clientes sistemas automatizados de cultivo hidropónico, mezclando la tecnología y el diseño inteligente de manera que el usuario pueda cultivar productos de calidad superior y de manera más saludable.
El entorno social y cultural en el cual se gestiona la empresa resulta atractivo la posibilidad de generar un negocio rentable para entregar una solución y una experiencia única a los habitantes de la capital del país o ciudades en crecimiento.
El mercado es incipiente y con un gran potencial de crecimiento.
El rol de la tecnología es un pilar fundamental en el cual se basa la empresa y una forma de entregar un valor agregado.
Dentro de este ambiente descrito, Intelligent Garden busca penetrar en el mercado con estrategias de enfoque con diferenciación, centrándose en entregar a sus clientes un producto de valor superior y ser reconocidos como una marca líder en innovación en sistemas de cultivo. Para a futuro cimentar el camino hacia una sociedad cada vez más preocupada por la alimentación y el medioambiente
En el siguiente plan de negocios se mostrará en profundidad las estrategias, el análisis industrial y el plan de marketing que validan la idea y el modelo de negocio viable y rentable
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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