1,721,032 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
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
Analisis Kandungan Garam Gunung Asal Krayan Kabupaten Nunukan Kalimantan Timur
No full textHas been studied composition of mountain salt from Krayan, Nunukan, East Kalimantan. This study aims to determine the composition of the minerals contained in the mountain salt. Mountain salt is obtained from wells Krayan District residents were further prepared for analysis using a technique using Atomic Absorption Spectrometer (AAS), further by looking at the pattern of X-ray Diffraction (XRD) and Scanning electron microscopic (SEM). Based on the results obtained AAS has identified mineral deposits include: Na, K, Mg, Al, Cu, Zn, Fe, Ba, and Sr. From the results of XRD shows that the main peak of the salt Krayan shows major peaks for NaCl crystals with impurities such as KCl, CaCl2, MgCl2, and AlCl3. SEM observation showed that morphology of Krayan salt have cube shape which is the shape of NaCl crystals with space group Fm3m and lattice parameter (a) 5.620 Ã…
Keywords : Mountain Salt, krayan, AAS, XRD, SEM
Abstrak
Telah dilakukan penelitian analisis kandungan garam gunung asal Krayan Kabupaten Nunukan Kalimantan Timur. Penelitian ini bertujuan untuk mengetahui komposisi mineral yang terkandung dalam garam gunung. Garam gunung diperoleh dari sumur warga Kecamatan Krayan yang selanjutnya dipreparasi untuk dianalisis dengan menggunakan menggunakan teknik Spektrometer Serapan Atom (SSA), selanjutnya dengan melihat pola Difraksi Sinar X (XRD), dan Scanning Elektron Microscopy (SEM). Berdasarkan hasil SSA telah diidentifikasi diperoleh kandungan mineral antara lain: Na, K, Mg, Al, Cu, Zn, Fe, Ba, dan Sr. Dari hasil XRD terlihat bahwa puncak utama dari garam krayan tersebut menunjukkan puncak utama untuk Kristal NaCl, dengan impurities antara lain KCl, CaCl2, MgCl2, dan AlCl3. Selain itu hal ini didukung pula oleh pengamatan SEM, bahwa morfologi SEM garam krayan memperlihatkan bentuk kristal kubus yang merupakan bentuk dari Kristal NaCl dengan grup ruang Fm3m dengan panjang kisi kristal 5,620 Ã….
Kata Kunci : Garam Gunung, Krayan, SSA, XRD,SE
Sintesis Oksida Aurivillius Sr2Bi4Ti5-xFexO18 (x = 0,25; 0,5; 0,75; dan 1)
No full textAurivillius oxides Sr2Bi4Ti5-xFexO18 have been synthesized using the solid state reaction method. Powder X-ray diffraction data were refined using Le Bail method implemented in Rietica have space group B2cb, Z = 4, and parameter cell are a = 5.542(8), b = 5.474(9), c = 48.947(1); a = 5.565(5), b = 5.491(9), c = 49,097(1); a = 5.533(7), b = 5.464(7), c = 48.595(2) and a = 5.621(1), b = 5.492(9), c = 49.78(4); respectively for x = 0.25, 0.5, 0.75, and 1. The substitution of cation Fe3+ in these Aurivillius oxides was showed increasing of magnetic moment are μ = 2.67, 3.21, 3.98, and 4.62 for x = 0.25, 0.5, 0.75, and 1 respectively.
Keywords: Aurivillus oxide, solid state reaction, Le Bail method, magnetic moment
ABSTRAK
Oksida Aurivillius Sr2Bi4Ti5-xFexO18 telah disintesis dengan menggunakan metode reaksi kimia padat. Data difraksi sinar-x serbuk yang penghalusan strukturnya menggunakan metode rietveld dengan program rietica menunjukkan bahwa oksida ini memiliki grup ruang B2cb, Z = 4, dan parameter selnya adalah a = 5,542(8), b = 5,474(9), c = 48,947(1); a = 5,565(5), b = 5,491(9), c = 49,097(1); a = 5,533(7), b = 5,464(7), c = 48,595(2) dan a = 5,621(1), b = 5,492(9), c = 49,78(4); berturut-turut untuk x = 0.25; 0,5; 0,75; dan 1. Substitusi kation Fe3+ pada oksida Aurivillius ini menunjukkan terjadinya peningkatan momen magnet oksida ini yaitu μ = 2,67; 3,21; 3,98; dan 4,62 berturut-turut untuk x = 0,25; 0,5; 0,75; dan 1.
Kata kunci: Oksida Aurivillius, reaksi kimia padat, metode Le Bail, momen magne
Identifikasi Metabolit Sekunder Dan Uji Aktivitas Antibakteri Isolat Jamur Endofit Daun Beluntas (Pluchea indica (L.) Less.)
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