1,721,047 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
Tool wear and tool life performance of TiA1N coated carbide cutting tools when turning XW 42 hardened tool steel
Full text linkHard turning is an alternative technique that can be used for finishing operations of hardened material (HRC 45 and above). CBN and ceramic tools are widely used for finish hard turning (54-55 HRC), but these tools are associated with significantly higher cost. This study was undertaken to investigate the performance of KC 5010 FP when turning XW 42 hardened tool steel (54-55 HRC). Tool performance, tool failure modes and wear mechanisms were investigated under various cutting conditions (V=100, 123, and 150 m/min, f=0.08, 0.1, and 0.125 mm/rev). Tool failure modes were also investigated, and flank wear, crater wear, and catastrophic failure are found to be occurring on the tool while flank wear is the main wear form found on tool. The wear mechanisms responsible for the wear formation are abrasion and adhesion. Mathematical models for tool life and surface roughness were developed using experimental design technique. Tool life and surface roughness models can be used for coated carbide tool KC 5010 FP for finishing hardened tool steel XW 42 (HRC 54-55) under cutting the condition investigated
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
DOSIS EFEKTIF ZEOLIT DALAM MENURUNKAN KADAR NH3 PADA LIMBAH CAIR PABRIK KARET PT. WAY KANDIS BANDAR LAMPUNG 2003 SOLAWATI
Full text linkIndustri karet merupakan industri yang menghasilkan limbah dengan kadar NH3 yang tinggi. Kadar NH3 yang tinggi akan mengakibatkan penurunan oksigen terlarut dalam air sehingga terjadi perubahan warna air dan timbul bau yang tidak sedap.
Penelitian ini bertujuan untuk mengetahui efektifitas zeolit dalam menurunkan kadar NH3 pada limbah cair pabrik karet PT. Way Kandis Bandar Lampung. Jenis penelitian yang digunakan adalah Quasi Exsperiment dengan rancangan Pretes Post Test Contro Group Design. Perlakuaan pemberian dosis zeolit dilakukan dengan lima variasi dosis serta satu perlakuan tanpa pemberian zeolit (kontrol), sedangkan replikasi sebanyak lima kali. Sampel diambil dari limbah cair Pabrik Karet PT. Way Kandis yang berlokasi di kelurahan Way Kandis kecamatan Kedaton Bandar Lampung. Pengolahan dan analisa data dengan uji anova. Hasil penelitian menunjukkan kadar NH3 sebelum perlakuan berkisar antara 15,97 mg/l sampai 18,02 mg/l sedangkan setelah perlakuan rerata kadar NH3 menjadi 9,73 mg/l sampai 3,33 mg/l. Berdasarkan uji anova satu jalan dengan tingkat kepercayaan 95%, dosis memberikan pengaruh yang berbeda dalam menurunkan kadar NH3. Dosis zeolit paling efektif secara statistik adalah 50 gr/l sedangkan berdasarkan kemampuannya dalam menurunkan kadar NH3 hingga kadar yang diperbolehkan adalah 35 gr/l.
Kata Kunci: DOSIS, EFEKTIF, ZEOLIT, PENURUNAN, KADAR NH
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
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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