1,720,972 research outputs found
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
Penggunaan Tes Diagnostik Four-Tier Untuk Diagnosa Model Mental Siswa Pada Konsep Kesetimbangan Heterogen Di SMAN 3 Padang
Full text linkModel mental merupakan konsep-konsep dalam pikiran siswa yang mewakili ide-ide yang digunakan untuk menggambarkan dan menjelaskan fenomena. Penelitian ini bertujuan untuk mendeskripsikan model mental peserta didik pada konsep kesetimbangan heterogen. Penelitian ini merupakan penelitian deskriptif kuantitatif atau mengkaji situasi apa adanya dengan melibatkan 30 siswa kelas XI SMAN 3 Padang. Pengumpulan data dilakukan dengan memberikan tes diagnostik four-tier berdasarkan multiple representasi kimia kepada peserta didik. Hasil penelitian menunjukkan kategori model mental peserta didik pada konsep kesetimbangan heterogen yaitu Synthesis-Partial Understanding B sebesar 43.33%, Synthesis-Misconception sebesar 33.33%, Initial Model sebesar 23.33%, sedangkan kategori Scientific Model dan Synthesis-Partial Understanding A tidak di miliki oleh peserta didik pada konsep kesetimbangan kimia. Peserta didik masih belum mampu menghubungkan ketiga level representasi kimia
Description of student learning difficulties in the acid-base material
Full text linkAcid-base material is material that class XI IPA students study in the even semester. In this material, 81.38% of class XI IPA students at SMAN 16 Padang have yet to achieve the minimum criteria set. It indicates that students have learning difficulties. Learning difficulties are failures to attain learning goals characterized by low learning outcomes. This study aims to determine the percentage of students who experience learning difficulties for each indicator on acid-base material and determine the factors that cause learning difficulties experienced by students in terms of learning methods. Its research is a type of descriptive research. The sample for this research was students in class XI IPA 2 at SMAN 16 Padang in the 2022/2023 academic year, which consisted of 34 people. The research instrument was a diagnostic test with two-tier multiple-choice questionnaires and interviews. The data analysis used is descriptive, namely analyzing and then providing an understanding of the data in the form of numbers so that an overview can be given in an orderly, concise, and clear manner. The results of this study stated that students of SMAN 16 Padang had learning difficulties in acid-base material, with a percentage of 66.65% in the high category. The highest difficulty level is found in the first indicator (Analyzing the properties of the solution based on the acid-base theory according to Arrhenius, Bronsted-Lowry, and Lewis) of 72.88%. Ineffective learning methods cause learning difficulties experienced by students. Effective ways of learning are making study schedules and carrying them out, reading and taking notes, repeating subject matter, concentrating, and doing assignments
DESCRIPTION OF STUDENTS' MENTAL MODELS ON BUFFER SOLUTION MATERIALS USING FOUR-TIER DIAGNOSTIC TESTS
Full text linkMental models are very important to know because they can describe the level of students' understanding of chemical phenomena related to certain materials, one of which is a buffer solution that emphasizes the interconnection understanding of the three levels of chemical representation. This study aims to describe the mental model of students in buffer solution materials. The research method used is quantitative descriptive. The sampling technique was purposive sampling, with a sample of 35 students. The research instruments used were a four-tier multiple choice diagnostic test based on mulltire, chemical presentations, and interviews.The results showed that the mental models of students on the buffer solution material were diverse, namely: Scientific Model with a percentage of 18.05%, Synthesis-Partial Understanding A of 5.35%, Synthesis-Partial Understanding B of 32.34%, Synthesis-Misconception of 26.27%, and Initial Model of 21.54%. The percentage of agreement between the test answers and the interview answers was 75% which showed that the answers given in the test and the interview were correct from the students' own understanding
Student’s Mental Model using Four-Tier Diagnostic Test on Acid-Base
Full text linkThe purpose of this study was to describe the mental model of students on the acid-base material class XI phase F. The type of research used is descriptive research with a quantitative approach. The research population consisted of students in class XI Phase F, and the research sample comprised 31 students from XI F9 at SMAN 2 Payakumbuh, using a purposive sampling technique. The data collection technique was conducted in two stages: the test stage and the interview stage. This test stage utilises a four-tier diagnostic test instrument, employing three levels of chemical representation. Then, the interview stage is conducted to gather data and confirm the results of the diagnostic tests that have been performed. The findings of this study detected that students have varied mental models. There are 41.1% have a mental model of synthesis-partial understanding B; 19.6% synthesis-partial understanding A; 15% initial model; 12.5% scientific model, and 11.8% synthesis-misconception. This is supported by the presentation agreement of the interview result with the diagnostic test
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