1,721,027 research outputs found
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
Framgångsrik kommunikation i matematikklassrummet
No full textThe research for this thesis was done to examine, describe and understand the ways in which mathematical content (algebra) is communicated in classrooms. It also sought to identify the opportunities that allow successful classroom communication. The educational design research approach in this study was used to understand the connection between teaching, communication and students' learning. The empirical material consisted of video-recorded lessons, observations, students’ tests and teachers’ written reports of the instructions for lessons. The empirical material was analysed using concepts relating to variation theory, strong compositionality and research results found in mathematics education. Some important findings have been found in this thesis. Communicative success is linked to a hierarchic structure of communicative events with a strong compositionality. It is also linked to the discernment of the structure of algebraic objects. This structure is a relation between para- and proto-mathematical concepts and a form of composition with a semantic character. Teachers support successful classroom communication by using research results found in mathematics education to open up patterns of variation in the critical aspects of an object of learning. Similarity is a pattern identified in this study, and it is defined as the property of two or more expressions to adapt the same meaning. Teachers also support successful classroom communication through a systematic analysis of the parts of an object of learning, relations between parts, how to relate the parts to each other in different ways, the relation between the parts, the relation between the parts and the whole as well as the relation between different wholes. Through and around tasks, teachers and students are communicating successfully or not according to the opportunities provided in the classroom to work out the meaning of the whole by understanding the meaning of the simple parts, the semantic significance of a finite number of syntactic modes of composition, and by recognizing how the whole is made up out of simple parts. If the choice/construction of tasks is focused on what may vary and what stays invariant, students' opportunities to distinguish aspects that could lead to algebraic generalizations are improved. One of the values of this study is in the design of the project that contributes to integration of research results found in mathematics education, in teachers' practice. In addition, a value of the study lies in its operational definition of the concept of communication, which can be used to study successful communication. Communication is a collectively performed patterned activity in which an aspect that is critical for one or more students (A) is focused on by the action of the teacher or other students (B) so that A discerns the aspects focused on by B
The significance of teaching to recognize the mathematical terms and notations
No full textWhile the concept of a function has been extensively researched worldwide, there has been limited investigation into how functions are taught in the classroom and the students’ opportunities to understand the uses of notation in two upper-secondary classroom settings. This paper aims to address this gap by examining the content presented in a textbook and within the teaching that occurs in two upper secondary classrooms. Data for the analysis were collected from two classes, involving two teachers and 45 students, and included video recordings of lessons and tests. The analytical framework is grounded in variation theory. The findings underscore the crucial role of teaching in providing students with the opportunity to discern the meaning of the notation related to the concept of a function.Felaktigt ISBN på publikationern: 978106702783</p
- …
