1,720,967 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
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
Studi Kadar Glukosa Darah Mencit yang Diinfeksi Trypanosoma evansi dengan Daya Virulensi yang Berbeda
Get PDFTrypanosoma evansi merupakan protozoa haemoflagella yang menginfestasi hewan ternak sebagai penyebab Surra. Untuk memelihara kelangsungan hidupnya, Trypanosoma tergantung pada suplai glukosa yang cukup dari darah inangnya. Glukosa digunakan oleh Trypanosoma dalam proses metabolisme dan pergerakan. Sejauh ini, studi tentang perbedaan kadar glukosa darah dari ternak yang diinfestasi Trypanosoma dengan daya virulensi yang berbeda (virulensi tinggi dan rendah) belum pernah dilaporkan. Penelitian ini bertujuan untuk mengetahui pengaruh infestasi T. evansi yang berbeda virulensinya pada hewan model (mencit) terhadap tingkat parasitemia dan kadar glukosa darahnya. Sebanyak 36 ekor mencit DDY jantan digunakan pada penelitian ini, yaitu enam ekor untuk perbanyakan T. evansi dan 30 ekor untuk perlakuan yang dibagi menjadi tiga kelompok dengan ulangan 10 ekor mencit/perlakuan, yaitu perlakuan 0 (P 0) adalah kelompok kontrol; perlakuan I (PI) adalah kelompok mencit yang diinfeksi T. evansi berdaya virulensi tinggi (isolat Bangkalan = B 87) dan perlakuan II adalah kelompok mencit yang diinfeksi T. evansi berdaya virulensi rendah (isolat Pemalang = P 287). Pengamatan kematian hewan coba dilakukan setiap hari, sedangkan tingkat parasitemia diamati setiap dua hari dan kadar glukosa diamati setiap empat hari. Kadar glukosa diukur menggunakan strip test glukosa. Hasil penelitian menunjukkan bahwa mencit kelompok PI menunjukkan penurunan kadar glukosa darah pada hari keempat pascainfeksi pada saat tingkat parasitemia mencapai puncak di dalam darah. Kematian serentak (100%) terjadi pada hari kelima pascainfeksi. Sebaliknya, meskipun tingkat parasitema mencapai puncak pada hari keenam pascainfeksi, tetapi kadar glukosa darah pada mencit kelompok PII masih dalam kategori normal. Penurunan kadar glukosa darah terjadi pada hari ke-16. Kematian mencit terjadi secara berhatap, dimulai pada hari kesepuluh (10%), hari ke-12 (30%) dan hari ke-18 (100%). Hasil studi ini mendukung data uji patogenitas kedua isolat tersebut yang telah dilaporkan sebelumnya
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
Analisis Sekuen Gen Tubulin-β Isotipe 1 Cacing Haemonchus contortus Isolat Resisten terhadap Benzimidazole pada Domba di Indonesia
No full text<p>Benzimidazole (BZ)<br />resistance to gastrointestinal nematodes in small ruminants<br />(sheep and goat) has become a significant problem worldwide.<br />Evidences of anthelmintic resistance to albendazole in<br />Indonesia has been reported from some government owned<br />farms in West Java, Central Java, and Yogyakarta. Previous<br />study on the sheep parasite H. contortus had shown that the<br />BZ resistance was related to selection for individuals in a<br />population possesing a spesific β-tubulin isotype 1 gene. The<br />study is aimed to determine mutation on coding region of<br />central part of β-tubulin isotype 1 gene of H. contortus resistant<br />strain from Indonesia. Seven H. contortus worms were<br />isolated from four BZ resistant sheep from two government<br />farms (SPTD Trijaya, Kuningan, West Java, and UPTD<br />Pelayanan Kesehatan Hewan, Bantul, Yogyakarta), and from<br />a BZ susceptible sheep from Cicurug, Sukabumi, West Java.<br />DNA was extracted individually from female H. contortus<br />worms. A fragment of 520 bp β-tubulin isotype 1 gene exon<br />3, 4, 5 was amplified using the PCR technique and then<br />sequenced. The results showed that a single mutation<br />occurred in codon 200 (from phenilalanine to tyrosine) had<br />caused benzimidazole resistance in H. contortus from SPTD<br />Trijaya, Kuningan, West Java. Mutation in β-tubulin isotype 1<br />gene of H. contortus from UPTD Pelayanan Kesehatan<br />Hewan, Yogyakarta, occurred in codon 198 (from glutamate<br />to glycine), codon 201 (from cystein to stop codon), and<br />codon 202 (from isoleucyne to stop codon).</p></jats:p
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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