1,721,059 research outputs found
Scientific Visualisations for Developing Students ’ Understanding of Concepts in Chemistry: Some Findings and Some Lessons Learned
No full textThis is the author’s version of a work that was submitted/accepted for pub-lication in the following source: Geelan, David, Mahaffy, Peter, & Mukherjee, Michelle (2014) Scientific visualisations for developing students ’ understanding of concepts in chemistry: some findings and some lessons learned
Does teaching sequence matter when teaching high school chemistry with scientific visualisations?
No full textFive Canadian high school Chemistry classes in one school, taught by three different teachers, studied the concepts of dynamic chemical equilibria and Le Chatelier's Principle. Some students received traditional teacher-led explanations of the concept first and used an interactive scientific visualisation second, while others worked with the visualisation first and received the teacher-led explanation second. Students completed a test of their conceptual understanding of the relevant concepts prior to instruction, after the first instructional session and at the end of instruction. Data on students' academic achievement (highest, middle or lowest third of the class on the mid-term exam) and gender were also collected to explore the relationship between these factors, conceptual development and instructional sequencing. Results show, within this context at least, that teaching sequence is not important in terms of students' conceptual learning gains.Full Tex
One approach to finding evidence for the effectiveness of scientific visualisations in high school physics and chemistry education
No full textEnormous amounts of money and energy are being devoted to the development, use and organisation of computer-based scientific visualisations (e.g. animations and simulations) in science education. It seems plausible that visualisations that enable students to gain visual access to scientific phenomena that are too large, too small or occur too quickly or too slowly to be seen by the naked eye, or to scientific concepts and models, would yield enhanced conceptual learning. When the literature is searched, however, it quickly becomes apparent that there is a dearth of quantitative evidence for the effectiveness of scientific visualisations in enhancing students' learning of science concepts. This paper outlines an Australian project that is using innovative research methodology to gather evidence on this question in physics and chemistry classrooms.Full Tex
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
What are highly effective strategies that improve student attendance in Queensland state secondary schools?
No full textDeclining student attendance at local, national, and global levels is a source of ongoing challenge for schools and school policy makers. The need to address this issue has been identified by various stakeholders such as parents, community members and media outlets. It is readily accepted among educators that high levels of student attendance are desirable, not only because when they are attained student learning performance is enhanced, but also for the many societal benefits that ensue when adolescents are actively engaged in productive pursuits. A literature review of available sources on this topic has identified key areas that have informed the theoretical basis for this study. Many of these could be addressed in practice in Queensland state secondary schools and beyond to support improved student attendance. The challenge of overcoming declining student attendance rates is fundamentally one of systems: systems of beliefs and values within families and the community, and systems of communication and relationships between school and students’ homes. Bronfenbrenner’s Ecological Systems Theory (Bronfenbrenner, 1979) provided the underpinning framework to conceptualise students’ school attendance and factors influencing it, with the view to helping schools improve attendance. Part A of this sequential, mixed methods study consists of a population level analysis of student attendance in Queensland state secondary schools, mapped against demographic data. Part A led to the selection of participants for Part B which consists of a series of case studies that identify the most effective strategies to improve student attendance, and the creation of a new model of student attendance improvement that can be applied across contexts. These outcomes are designed to contribute to educators’ efforts to improve student attendance in schools in Queensland, nationally and internationally.Thesis (Professional Doctorate)Doctor of Education (EdD)School Educ & Professional StArts, Education and LawFull Tex
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
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