1,721,013 research outputs found
Active Learning and ICT in Upper Secondary School: an Exploratory Case Study on Student Engagement by Debating
No full textThe paper outlines the first phase of a three-year research activity on active learning in the core curriculum subject, intended as a possible solution to student disengagement in secondary schools. The paper presents the problem the research intend to attack - school failure, school unsuccess, student disengagement and early school leaving - and describes the context of the research, its originality, and the remedial measures put in place by the research team and policy makers. Among those, Continuing Professional Development (CPD) of teachers and structural measures to involve several stakeholders, including students. Then, the research design is given and the research tools presented, showing what dimensions are investigated. Finally, it provides the results on one of the four case studies carried out, namely the one on foreign language teaching
α-tricalcium phosphate hydrolysis to octacalcium phosphate: Effect of sodium polyacrylate
No full textα-Tricalcium phosphate (α-TCP) hydrolysis into octacalcium phosphate (OCP) has been investigated in phosphoric acid solution at different concentrations of sodium polyacrylate (NaPA). The hydrolysis process has been followed by powder X-ray diffraction, infrared absorption and scanning electron microscopy analyses. In the absence of the polyelectrolyte, α-TCP undergoes a complete transformation into OCP in 24 h. The presence of polyacrylate in solution inhibits the hydrolysis so that a NaPA concentration of 0.5μM is sufficient to lengthen the time required to complete the hydrolysis to 4 days. The variation of Ca2+ concentration in the soaking solution suggests that the transformation occurs through α-TCP dissolution followed by OCP precipitation. The delayed OCP nucleation and growth in the presence of polyacrylate implies a preferential adsorption of the polyelectrolyte on the growing OCP crystals, which induces an anisotropic reduction of the coherence lengths of the perfect crystalline domains. © 2002 Elsevier Science Ltd. All rights reserved
alfa-Tricalcium phosphate hydrolysis to octacalcium phosphate: effect of sodium polyacrylate.
No full textTEAL as an innovative teaching model. Insights from “Educational Avant-Garde” Movement in Italy
No full textSince 2013, INDIRE has been carrying out research activities with the goal of identifying practices that could represent a disruptive and radical change in the traditional classroom pedagogy.
Among all the innovative teaching models, (twelve identified at present), INDIRE selected the practice adopted by a network of Italian schools and imported by the Massachusetts Institute of Technology. This practice, whose acronym is TEAL proved to be effective in changing the classroom routines and in improving students’ learning achievements. In particular, Italian schools have pointed out that by using TEAL, students improve their learning experience and outcomes, feel more engaged, satisfied, aware of ICT pros and cons, and take more responsibility over their learning.
Teachers remark that a TEAL-style pedagogy helps them work closely with their colleagues because
the problem-solving approach forces them to rethink their subject curriculum. Moreover, by using TEAL,
the education setting is rearranged, the uses of technologies require making conscious pedagogical
choices and flipping the classroom becomes more natural.
This paper analyses the original TEAL model at MIT and the derivative practices observed in the
Italian schools. Even if other publications describe the TEAL Model, this paper reflects on the positive
results of its impact on the Italian school system, underlying strengths and weakness of the process
of innovation in schools
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
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