1,720,966 research outputs found
A Tribute to Emeritus Professor David Tall: A Mentor, Scholar, and Academic Father
Get PDFThis tribute reflects on the life and contributions of Emeritus Professor David Tall, a distinguished scholar in Mathematical Thinking and Mathematics Education, who passed away on July 15, 2024. David Tall’s groundbreaking ideas, such as concept image, procept, and the three worlds of mathematics, have profoundly influenced the mathematics education community. His philosophy of reciprocal learning and encouragement of innovative research shaped many scholars, including the author, who considers him not only a supervisor but an academic father. David\u27s legacy will continue to inspire future generations in academia
Making sense of mathematics : supportive and problematic conceptions with special reference to trigonometry
Get PDFThis thesis is concerned with how a group of student teachers make sense of
trigonometry. There are three main ideas in this study. This first idea is
about the theoretical framework which focusses on the growth of
mathematical thinking based on human perception, operation and reason.
This framework evolves from the work of Piaget, Bruner, Skemp, Dienes,
Van Hiele and others. Although the study focusses on trigonometry, the
theory constructed is applicable to a wide range of mathematics topics.
The second idea is about three distinct contexts of trigonometry namely
triangle trigonometry, circle trigonometry and analytic trigonometry.
Triangle trigonometry is based on right angled triangles with positive sides
and angles bigger than 0 [degrees] and less than 90 [degrees]. Circle trigonometry involves
dynamic angles of any size and sign with trigonometric ratios involving
signed numbers and the properties of trigonometric functions represented
as graphs. Analytic trigonometry involves trigonometric functions expressed
as power series and the use of complex numbers to relate exponential and
trigonometric functions.
The third idea is about supportive and problematic conceptions in making
sense of mathematics. This idea evolves from the idea of met‐before as
proposed in Tall (2004). In this case, the concept of ‘met‐before’ is given a
working definition as ‘a trace that it leaves in the mind that affects our
current thinking’. Supportive conception supports generalization in a new
contexts whereas problematic conception impedes generalization.
Furthermore, a supportive conception might contain problematic aspects in
it and a problematic conception might contain supportive aspects in it. In
general, supportive conceptions will give the learner a sense of confidence
whereas problematic conceptions will give the learner of sense of anxiety.
Supportive conceptions may occur in different ways. Some learners might
know how to perform an algorithm without a grasp of how it can be related
to different mathematical concepts and the underlying reasons for using
such an algorithm
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
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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