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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
Chemical Screening and Antioxidant Activity of Ethyl Acetate Fraction and Residue from Lansium domesticum Ethanolic Extract
No full textLangsat (Lansium domesticum) is a plant that thrives in the tropics. The search for photoprotective compounds derived from natural ingredients has been intensively conducted to develop cosmetic formulations to obtain safe and protective products against UV rays. This study aims to identify chemical compounds in the ethyl acetate fraction and residues of ethanol extract from L. domesticum bark using tube and gas chromatography-mass spectrophotometry tests. At the same time, the antioxidant activity and SPF values were assessed with the DPPH and FRAP methods. The qualitative GC-MS test obtained the percentage peak value and molecular weight. Furthermore, the antioxidant activity was tested using the compound DPPH measured with an ELISA reader at a wavelength of 515.5 nm with UV/vis spectrophotometer and FRAP method using FeCl3 and TPTZ compounds at 615 nm. The SPF value was assessed using Mansur's formula with UV/Vis spectrophotometer at 290 to 320 nm. The results obtained in the ethyl acetate fraction showed terpenoids, while the residue contains phenolics, flavonoids, tannins, and saponins. The GC-MS tests found that the ethyl acetate fraction had 47 types of chemical compounds, including terpenoids and fatty acids group; in the residue, four classes were found, with terpenoid and fatty acid groups being more predominant. Based on the results, the ethyl acetate fraction has an IC50 value of 341.25±26.45 µg/ml and 436.3±10.8 µg/ml; the residue was 94.72±34.22 µg/ml and 2602.79±11.8 µg/ml. Additionally, the SPF values for both were 2.87 and 3.9
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
POTENSI SENYAWA ANTIOKSIDAN TANAMAN ENDEMIK PADA MASYARAKAT DAYAK SEKAJANG DI KALIMANTAN BARAT
No full textPenelitian ini dilakukan untuk mengetahui khasiat tanaman obat yang digunakan secara empiris pada masyarakat dayak di dusun Sekajang. Kelompok masyarakat adat yang berada di dusun Sekajang yaitu Dayak Semuh. Menurut hasil wawancara yang dilakukan terhadap Batra (Pengobat Tradisional) pada penelitian Riset Tanaman Obat dan Jamu tahun 2015 diperoleh ramuan yang digunakan dalam pengobatan nyeri oleh masyarakat dayak sekajang. Ramuan yang digunakan terdiri  daun buluh (Bambusa vulgaris), daun sak (Melastoma malabathricum), kulit batang langsat (Lansium domesticum correa), daun saoh, daun empedu. Pada penelitian ini proses ekstraksi dilakukan secara maserasi menggunakan etanol 95%. Dilakukan uji metabolit kandungan senyawa kimia dan uji aktivitas antioksidan dengan menggunakan DPPH. Hasil identifikasi terhadap kandungan metabolit sekunder senyawa diperoleh adalah alkaloid, fenol, tannin, flavonoid, saponin, dan terpenoid. Nilai aktivitas antioksidan yang dimiliki masing-masing ekstrak yaitu Daun Buluh (Bambusa vulgaris) 67%, Daun Sak (Melastoma malabathricum) 64%,  Kulit Batang Langsat (Lansium domesticum correa) 55,6%, Daun Empedu 64,98 %, dan Daun Saoh 73,02%.Kata Kunci:  Antioksidan , DPPH, Dusun Sekajang, Tanaman Endemik
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
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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