1,721,489 research outputs found
Importancia de compost para la conciencia ambiental en estudiantes de secundaria de la I.E. N° 14460 “Juan Velasco Alvarado”- Huancabamba
No full textEl objetivo de este trabajo de investigación titulada “Importancia de compost para la conciencia ambiental en estudiantes de secundaria de la Institución Educativa N° 14460 “Juan Velasco Alvarado”- Huancabamba”. El enfoque metodológico adoptado fue cuantitativo y aplicado. Se seleccionó un diseño no experimental de tipo transversal, enmarcado en un abordaje descriptivo y correlacional. La muestra estuvo compuesta por 40 estudiantes. Para la recopilación de información, se optó por la técnica de encuesta, utilizando cuestionarios que contenían 20 ítems correspondientes a las variables bajo análisis. La conclusión indica que, existe relación de confiabilidad, siendo el valor de correlación de 0.517 entre el aprendizaje cooperativo y habilidades sociales en las competencias matemáticas de estudiantes, presentando un valor de significación de 0,001 siendo menor al 0,05 por lo que se acepta la hipótesis alterna, rechazando la hipótesis nula, confirmando que: la importancia de compost se relaciona en forma directa con la conciencia ambiental en estudiantes de secundaria de la Institución Educativa N° 14460 “Juan Velasco Alvarado”- Huancabamba.The objective of this research project, entitled “Importance of Compost for Environmental Awareness in Secondary School Students of Educational Institution No. 14460 “Juan Velasco Alvarado” – Huancabamba,” was to study the environmental impact of composting. The methodological approach adopted was quantitative and applied. A non-experimental, cross-sectional design was selected, framed within a descriptive and correlational approach. The sample consisted of 40 students. Data was collected using a survey technique, employing questionnaires containing 20 items corresponding to the variables under analysis. The conclusion indicates that there is a reliable relationship, with a correlation value of 0.517 between cooperative learning and social skills in students' mathematical competencies, presenting a significance value of 0.001, which is less than 0.05, therefore the alternative hypothesis is accepted, rejecting the null hypothesis, confirming that: the importance of compost is directly related to environmental awareness in secondary school students of the Educational Institution No. 14460 “Juan Velasco Alvarado”- Huancabamba.Educación experimental en sistemas bióticos y abiótico
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“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
Full text linkWe 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
Gas permeation characteristics of heterogeneous ODPA-BIS P polyimide membranes at different temperatures
No full text© 2007 Elsevier B.V. Financial support from University Complutense of Madrid under project PR1/06-14460-B is gratefully acknowledged.Heterogeneous carbon molecular sieves and hypercrosslinked polystyrene microparticles adsorbent-based membranes with a (ODPA-BIS P) polyimide binder were prepared. The effect of adsorbent particles on the gas transport properties of heterogeneous membranes was studied. Permeability, diffusion and solubility coefficients of He, CO2, O-2 and N-2 were estimated for homogeneous and heterogeneous membranes at a feed pressure of 1 atm for different temperatures between 25 and 60 degrees C. It was observed that adsorbent-filled (ODPA-BIS P) polyimide membranes exhibit higher gas permeability in comparison with adsorbent-free membrane, while permselectivity is maintained. The results also showed that the adsorbents enhance significantly gas diffusivity in (ODPA-BIS P) polyimide membrane, whereas the gas solubility is clearly reduced. In both type of heterogeneous membranes, gas permeation and diffusion are thermal activated processes described by the Arrhenius equation, whereas the Sorption process is exothermic. The addition of both type of adsorbents to the (ODPA-BIS P) polyimide membrane increases the activation energy of permeability, this is mainly due to a significant increase of the heat of sorption, because the activation energy for diffusion is slightly decreased.Universidad Complutense de MadridDepto. de Estructura de la Materia, Física Térmica y ElectrónicaFac. de Ciencias FísicasTRUEpu
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
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