1,720,986 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
NILAI KETANGGUHAN DAN BENTUK STRUKTUR MIKRO DARI PERUBAHAN KUAT ARUS PENGELASAN PIPA SPIRAL
No full textLas SAW merupakan bentuk pengelasan yang banyak digunakan untuk fabrikasi pipa, misalnya pipa spiral. Luasnya pemakaian las SAW disebabkan karena pengelasan dapat dilakukan secara otomatis dan memiliki keandalan yang tinggi. Ketangguhan las dipengaruhi oleh banyak faktor diantaranya masukan panas, kuat arus, filler dan fluks, kecepatan las dan laju pendinginan. Tujuan dari penelitian ini dimaksudkan untuk mendapatkan struktur mikro berupa ferit acicular yang dapat memberikan kekuatan tinggi dan nilai kekerasan yang rendah dari sambungan las. Hal ini dilakukan dengan membuat variasi heat input pada pengelasan. Percobaan dilakukan menggunakan bahan Baja API 5L X-52 dengan variasi kuat arues pada arus DC 800 Amper, 825 Amper, 850 Amper, 875 Amper and 900 Amper pada pengelasan pipa spiral di bagian luar, dengan kecepatan pengelasan 13,67 mm/s dan Tegangan 35 volt. Pengujian meliputi pengamatan mikro struktur dan ketangguhan. Hasil penelitian menunjukkan bahwa semakin tinggi penggunaan kuat arus dapat meningkatkan jumlah presentase ferit acikular dan meningkatkan nilai ketangguhan
Optimalisasi Penggunaan Heat Input pada Pengelasan Pipa Spiral untuk Meningkatkan Kekuatan Sambungan
Full text linkSubmerged Arc Welding is a welding process used for fabrication of pipes, for example spiral welded pipes. The technique
can be operated automatically and has a high reliability in many various welding aplication. Some factor affecting the
strength of weld metals are Heat Input, current, chemical composition of filler and flux, welding speed and cooling rate. The
purpose of this thes is is to obtaine microstructure containing acicular ferrite which give high strength and low hardness of
the submerged arc welded pipes.Material used in this experiment was API 5L X-52 spiral welded steel pipes, Welding was
carried out using voltage of 35 volt, welding speed of 13,67 mm/s whereas Heat Input was varied, namely 2,059 kJ/mm,
2,123 kJ/mm, 2,187 kJ/mm, 2,252 kJ/mm and 2,316 kJ/mm. A series of mechanical properties test were carried out including
hardness and tensile test. The result show that, an increase in weld Heat Input make increased the tensile strength but the
hardness number decrease
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
Optimalisasi Penggunaan Heat Input pada Pengelasan Pipa Spiral Untuk Meningkatkan Kekuatan Sambungan
No full textSubmerged Arc Welding is a welding process used for fabrication of pipes, for example spiral welded pipes. The technique can be operated automatically and has a high reliability in many various welding aplication. Some factor affecting the strength of weld metals are heat input, current, chemical composition of filler and flux, welding speed and cooling rate. The purpose of this thes is is to obtaine microstructure containing acicular ferrite which give high strength and low hardness of the submerged arc welded pipes.Material used in this experiment was API 5L X-52 spiral welded steel pipes, Welding was carried out using voltage of 35 volt, welding speed of 13,67 mm/s whereas heat input was varied, namely 2,059 kJ/mm, 2,123 kJ/ mm, 2,187 kJ/mm, 2,252 kJ/mm and 2,316 kJ/mm. A series of mechanical properties test were carried out including hardness and tensile test. The result show that, an increase in weld heat input make increased the tensile strength but the hardness number decrease
Perbaikan proses pengelasan sebagai upaya untuk meningkatkan kekuatan dan kekerasan hasil dari sambungan las/ Subeki
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