1,720,969 research outputs found
Effects on growth mindset development of a teaching/learning sequence on surface phenomena
Full text linkIn this paper we discuss some aspects of the design of a teaching/learning sequence
(TLS) on surface phenomena for high school students, inspired by the ideas proposed by inquiry and investigative based learning approaches. A good understanding of surface phenomena is relevant in Physics and other scientific and technical fields. This, and the acknowledgement that traditional teaching methods used to introduce the basic concepts related to this topic have often proved to be not very effective in captivating students’ interest and in favoring authentic understanding of the related physical content drove us in choosing this physics topic. Furthermore, some considerations on a case study on the efficacy of the TLS on the development of a growth mindset are reported
Affordable methods for surface tension and contact angle measurements
Full text linkIn this paper, we present two different experiments aimed at supporting the understanding of surface phenomena at undergraduate level. In the first experiment, we measure the surface tension of several common liquids like water, oil, alcohol, etc by using a simplified custom-built Du Nouy ring apparatus. In the second experiment, the contact angle at the water-glass-air interface is estimated by means of two glass slides that form a sort of variable-size capillary. Materials and experimental apparatuses require a low budget, but the results agree very well with those reported in the literature, obtained with much more sophisticated and expensive equipment. This makes the experiments presented here suitable for educational paths aimed at understanding surface phenomena at undergraduate and even at high school level
A study of capillarity phenomena by using a computer-based simulation approach
No full textLiquid properties are relevant for the understanding of fundamental and applied sciences. Among these properties, those that can be traced back and explained through the surface tension are particularly interesting to study and reconstruct in educational terms. Traditional educational treatment of surface tension is often obscure or too complex, sometimes superficial or completely neglected. The aim of the research here described is to discuss in detail a mesoscopic model of liquids and show quantitative results obtained by a computer simulation approach. Looking at the educational aspect, the main advantage of this approach is that it allows the student/teacher to control the simulation parameters and understand step by step how the physical quantities influence the investigated system. Some of themain properties of capillarity phenomena (meniscus formation, capillary rise, etc) are analysed through the simulation of a liquid in a tray with a capillary tube inside, where a value of surface tension is obtained
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
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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