1,720,954 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
ANALISIS KOMPATIBILITAS CAMPURAN PELUMAS INDUSTRI (MESIN DAN HIDROLIK) DARI BAHAN DASAR MINERAL DAN SINTETIK
Full text linkSalah satu komponen yang terpenting dari kinerja sebuah mesin adalah minyak pelumas atau yang biasa disebut oli. Minyak pelumas berfungsi mengurangi terjadinya gesekan-gesekan antar komponen yang dapat mengakibatkan kerusakan pada mesin. Dengan berkembangnya teknologi saat ini berbagai merk pelumas dari jenis yang sama maupun yang berbeda semakin banyak beredar dipasaran. Sangat dianjurkan untuk melakukan analisis kompatibilitas dilaboratorium sebelum melakukan pencampuran untuk memastikan bahwa pelumas dapat larut dengan baik (kompatibel). Pencampuran dua jenis pelumas yang tidak kompatibel dapat menjadi salah satu penyebab utama terjadinya kegagalan mesin dan pelumas. Pada penelitian ini pelumas yang digunakan adalah pelumas industri yaitu dari jenis pelumas mesin dan hidrolik. Uji kompatibilitas dilakukan di laboratorium dengan metode pengujian ASTM D-7155. Pada penelitian ini sampel dibuat dengan komposisi campuran 0:100, 20:80, 50:50, 80:20, dan 100:0. Pengamatan dilakukan selama 7 hari pada dua kondisi suhu yaitu suhu 65°C dan suhu kamar. Hasil pengamatan menunjukkan bahwa pelumas mesin industri monograde (SAE 40) dan multigrade (SAE 80W-90) dari bahan dasar mineral kompatibel jika dicampur dengan bahan dasar mineral yang sama. Sedangkan pada sampel pelumas mesin monograde mineral dicampur dengan sintetik setelah diamati mulai hari ke-6 pada suhu 65°C terdapat endapan pada komposisi 50:50 dan 80:20. Hal ini menunjukkan bahwa sampel pelumas tersebut tidak kompatibel dan tidak dapat dilakukan pencampuran pada saat digunakan pada mesin. Pada penelitian campuran pelumas hidrolik ISO VG 46 dan ISO VG 32 dengan bahan mineral, semua komposisi tidak terdapat endapan dan tidak terjadi pemisahan selama pengamatan. Pelumas terlihat bersih dan dapat larut dengan baik (kompatibel)
Kata kunci: pelumas industri, pelumas hidrolik, pelumas mesin, kompatibilitas peluma
Pengaruh Waktu Pereaksian K2so4 Terhadap Yield Pembuatan Alum Dari Tanah Liat Plered Dengan Proses Kering
Full text linkSelama ini pemanfaatan mineral tanah liat baru sebatas untuk bahan baku pabrik keramik, semen, genteng dan batu bata, padahal tanah liat dapat didiversifikasikan nilai ekonomisnya untuk keperluan lain seperti pembuatan Alum yang dapat digunakan untuk proses pengolahan air. Penelitian ini bertujuan untuk mencari kondisi optimum dari waktu reaksi terhadap yield pembuatan alum dari tanah liat dengan proses kering. Penelitian ini merupakan eksperimen untuk menentukan kondisi operasi pada pembuatan alum dari tanah liat, analisis korelasi antara waktu reaksi dan yield pembentukan alum diolah menggunakan metode persamaan “Least Square”. Hasil penelitian didapatkan waktu reaksi Kalium Sulfat maksimum pembentukan Alum berlangsung selama 1.75 jam (105 menit) dengan yield 76.7%, sedangkan waktu reaksi optimum terjadi pada waktu 0,167 jam (10 menit) dengan yield sebesar 68,4%
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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