1,720,966 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
PENENTUAN KADAR GULA DARAH PADA PENDERITA DIABETES MELLITUS (DM) MELALUI UJI SPEKTROSKOPI ASETON DALAM AIR LIUR.
Full text linkTelah dilakukan penelitian untuk menetukan hubungan antara kadar aseton dalam air liur dengan kadar gula darah pada penderita diabetes mellitus (DM). Sampel terdiri dari dua kelompok, lima orang tanpa keluhan DM dan lima orang pasien DM dari RSUP Dr. M. Djamil Padang. Pengambilan air liur dan pengukuran gula darah dilakukan bersamaan pada dua waktu, dua jam setelah makan dan setelah berpuasa selama dua belas jam. Semua sampel air liur dispektroskopi dengan spektrofotometer UV-Vis menggunakan lampu xenon sebagai sumber cahaya. Hasil penelitian menunjukkan bahwa terdapat korelasi tinggi antara kadar aseton dalam air liur dengan kadar gula darah dengan koefisien korelasi sebesar 0.985.</jats:p
PENGARUH FISISORPSI ZEOLIT ALAM TERAKTIVASI PADA PEMBUATAN BIODIESEL DARI MINYAK JELANTAH
Full text linkTelah dilakukan penelitian untuk mengetahui pengaruh penggunaan zeolit alam teraktivasi sebagai penyerap (adsorben) dalam proses pembuatan biodiesel berbahan dasar minyak jelantah. Pembuatan biodiesel menggunakan minyak jelantah menggunakan prosedur standar. Untuk melihat pengaruh zeolit alam teraktivasi sampel diberikan beberapa perlakuan yang berbeda, perlakuan TZ (Tanpa Zeolit), biodiesel TA (Tanpa Aktivasi) yang menggunakan zeolit alam sebagai adsorben namun tanpa aktivasi, biodiesel A1 100 yang menggunakan zeolit alam yang telah diaktivasi selama satu jam pada temperatur 100oC, serta biodiesel A2 100, A1 150, A2 150, A1 200 dan A2 200. Semua sampel dikarakterisasi dengan menggunakan uji sifat fisik yaitu kerapatan relatif, viskositas kinematik, densitas dan uji korosi terhadap lempeng tembaga mengacu pada standar ASTM dan Dirjen Migas. Hasil penelitian menunjukkan bahwa zeolit alam yang telah diaktivasi secara fisika terbukti mampu meningkatkan kualitas biodiesel dari minyak jelantah. Biodiesel yang memenuhi standar untuk semua pengujian adalah A2 150, A1 200 dan A2 200.</jats:p
INTERFEROMETER MICHELSON DAN CCD WEBCAM SEBAGAI PENENTU FREKUENSI GETAR OBJEK
Full text linkTelah dilakukan penelitian pengukuran getaran suatu obyek dengan menggunakan interferometer Michelson dan CCD webcam. Pola intereferensi dihasilkan dari perbedaan lintasan laser HeliumNeon dengan panjang gelombang 632,8 nm melewati obyek getar speaker piezo yang diletakkan pada cermin uji. Pemberian frekuensi getar dimulai 5 Hz – 30 Hz dengan kelipatan 5 Hz serta frekuensi 1 KHz-20 KHz dengan kelipatan 1 KHz. CCD webcam dapat merekam berkas sinar laser dari cermin referensi dan cermin uji dengan kemampuan CCD webcam 30 frame perdetik. Perubahan intensitas laser yang menggambarkan frekuensi getar obyek dapat dilihat pada frekuensi di bawah frekuensi CCD webcam
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
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