1,720,970 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
PEMANFAATAN BAKTERI UNTUK MENURUNKAN KONSENTRASI CEMARAN MERKURI
No full textAbstrak Penelitian ini bertujuan untuk menggali potensi bakteri yang resisten terhadap merkuri sebagai biosorbent merkuri. Melalui penelitian ini telah diisolasi 64 isolat bakteri yang resisten terhadap 3 macam senyawa merkuri pada konsentrasi 1µg/ml. bakteri tersebut diisolasi dari air dan sedimen Sungai Banjir Kanal Barat Semarang dengan metode enrichment. Selanjutnya dilakukan seleksi untuk memperoleh isolate yang paling resisten terhadap merkuri dengan cara meneumbuhkannya dalam medium yang mengandung merkuri pada konsentrasi yang semakin meningkat.Hasil seleksi menetapkan isolate no 11(Pseudomonas sp) sebagai isolate yang paling resisten karena mampu tumbuh dengan baik pada konsentrasi merkuri (sebagai HgCl) 20µg/ml. Isolat ini selanjutnya dipakai dalam penelitian yang mencangkup pengaruh senyawa merkuri(HgCl2) terhadap pertumbuhan sel bakteri, kemampuan sel bakteri mengaakumulasikan merkuri dari medium selama pertumbuhan, dan pada system resting cell, serta penentuan letak akumulasi merkuri pada sel bakteri. Pertumbuhan sel bakteri dipantau dengan spektrofometer pada panjang gelombang 600nm, sedangkan konsentrasi merkuri ditentukan dengan Atomic Absorption Spectrophotometer (AAS). Hasil yang diperoleh menunjukan bahwa pertumbuhan sel bakteri terhambat kecuali bila inoculum ditumbuhkan dalam medium yang mengandung merkuri. Bakteri yang ditumbuhkan dalam medium cair yang mengandung merkuri dari medium pertumbuhan sebesar 94% selama tiga jam masa inkubasi, dan ditemukan pula bahwa 85% merkuriyang hilang dari medium diakumulasikan di dlam sel. System resting cell tidak mampu menurunkan konsentrasi merkuri dalam larutan
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
The Effectiviness of Student Teams Achievement Division and Scrambel Combined Model on Collaborative Skills and Conceptual Knowledge Mastery of Class X SMAN 1 Semparuk on Bacteria
Get PDFThis study aims to analyze whether or not there is a significant difference in collaboration skills and mastery of conceptual knowledge of students who follow the STADBEL combined model learning in the experimental class with students who follow the Make a Match model learning in the control class on the subject of bacteria class X SMAN 1 Semparuk. In this study used non-equivalent control group design. The research sample was students of class X MIPA SMA. Sampling used cluster random sampling technique. The instruments used consisted of conceptual knowledge mastery tests and non-test collaboration skills in the form of questionnaires and self-assessment questionnaires of student responses to learning and student responses to learning models. Learning with the STADBEL combined model can be effective on collaboration skills and mastery of conceptual knowledge of students. A Sig value of 0.027 < 0.05, it is concluded that there is a significant effect of the STADBEL combined model on collaboration skills and mastery of conceptual knowledge of students. These results indicate that the STADBEL combined model effectively improves collaboration skills and mastery of conceptual knowledge of students of SMAN 1 Semparuk class X IPA on the subject of bacteria.Penelitian ini bertujuan untuk mengetahui keefektifan model gabungan STAD dan Scramble terhadap: 1) peningkatan kemampuan kolaborasi dan penguasaan pengetahuan konseptual, 2) peningkatan kemampuan kolaborasi, 3) peningkatan penguasaan pengetahuan konseptual, dan 4) hubungan antara kemampuan kolaborasi dan penguasaan pengetahuan konseptual siswa pada materi bakteri SMAN 1 Semparuk kelas X. Metode yang digunakan adalah quasi experiment dengan desain non-equivalent control group design. Populasi dalam penelitian ini adalah seluruh siswa SMAN 1 Semparuk kelas X. Instrumen yang digunakan terdiri dari tes dan non tes berupa angket. Berdasarkan hasil analisis menunjukkan bahwa terdapat pengaruh yang signifikan dari model gabungan STAD dan Scramble terhadap kemampuan kolaborasi dan penguasaan pengetahuan konseptual siswa nilai Sig 0,027 < 0,05. Kemudian untuk hasil nilai univariat keterampilan kolaborasi dengan nilai Sig 0,04 < 0,05 dan penguasaan pengetahuan konseptual dengan nilai Sig 0,01 < 0,05. Hubungan antara kemampuan kolaborasi dengan penguasaan pengetahuan konseptual dengan nilai Sig 0,000 < 0,5 dengan nilai r sebesar 0,501 menunjukkan adanya hubungan yang cukup kuat antara kemampuan kolaborasi dengan penguasaan pengetahuan konseptual
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