1,720,956 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
Identifikasi Kandungan Senyawa Antioksidan Ekstrak Daun Bidara (Ziziphus mauritiana Lamk.) Dengan Menggunakan Metode DPPH
Full text linkBidara is a plant that is known to be rich in antioxidants and is a plant that can withstand extreme temperatures and is able to survive in a rather dry environment. Bidara leaves are included in the type of compound leaves where these compound leaves have branching stalks and on the stem branches there are leaf blades, on one stalk there are more than one leaf blade, a compound leaf is considered to come from a single leaf whose incision is so deep that the the leaves between the nicks are separate from each other and each is a separate little strand. The purpose of this study was to determine the level of antioxidants contained in bidara leaf extract (Ziziphus mauritiana Lamk) using the DPPH method. The method used is the DPPH method (2,2-diphenyl-1-picrylhydrazyl). This test consisted of 4 concentration treatments, namely, 50 ppm, 100 ppm, 150 ppm, and 200 ppm with each comparison of vitamin C with a concentration of 2 ppm, 4 ppm, 6 ppm and 8 ppm. By testing using Uv-Vis Spectrophotometry. The results of this study obtained a linear equation Y = 0.0005x + 0.4172, so the IC50 value is 119.84 (μg/ml), this means that the level of antioxidant activity of bidara leaf extract is moderate
Formulasi dan Uji In Vitro Nilai Sun Protecting Factor (SPF) Krim dari Cangkang Telur Ayam Ras
Full text linkPotensi limbah cangkang telur (CT) ayam ras di Indonesia cukup besar yakni dihasilkan + 133.703 ton per tahunnya. Penyusun utama dari cangkang tersebut adalah kalsium karbonat (CaCO3) sebesar + 98% dapat berfungsi memblok sinar ultraviolet yang akan terpapar pada kulit. Penelitian ini bertujuan untuk membuat formula dan penentuan nilai sun protecting factor (SPF) secara in vitro krim dari limbah cangkang telur ayam ras. Formula dibuat dengan perbedaan konsentrasi cangkang telur F1(10%) dan F2 (15%). Kemudian dilakukan evaluasi karakteristik fisik yang meliputi uji organoleptis, tipe emulsi, kriming, viskositas dan pH serta inversi fase sebelum dan setelah kondisi dipercepat selama 10 siklus. Selanjutnya ditentukan nilai SPF menggunakan spektrofotometer UV-VIS pada panjang gelombang 290-320 nm dan hasil pengukurannya dihitung menggunakan rumus SPF. Data hasil evaluasi kestabilan fisik krim dianalisis menggunakan SPSS dengan uji T parsial dengan tingkat kepercayaan 95% dan signifikansi dianggap bermakna jika P<0,05. Sedangkan nilai SPF dianalisis berdasarkan kategori proteksi tabir surya. Hasil penelitian menunjukkan F1 dan F2 memiliki stabilitas fisik yang memadai. Hasil uji nilai SPF baik CT 7500; CT 9000, F1 dan F2 menunjukkan tidak ada perbedaan kategori proteksi UV. Semua kelompok menunjukkan aktivitas uv protektif dengan kategori ekstra.The potential of chicken eggshell waste in Indonesia is quite large, which is produced + 133.703 every years. The main constituent of this shell is 98% of calcium carbonate (CaCO3) which functions to block ultraviolet light that will be exposed to the skin. This study aims to make a formula and determine the sun protecting factor (SPF) by in vitro test of cream from waste of this eggshells. The formula was made with difference concetration of this eggshell F1 (10%) and F2 (15%). Then the evaluation of physical characteristics includes organoleptic test, emulsion type, creaming, viscosity and pH as well as phase inversion before and after the accelerated condition for 10 cycles. Furthermore, the SPF was determined using a UV-VIS spectrophotometer at a wavelength of 290-320 nm and the measurement results were calculated using the SPF formula. The data from the evaluation of the physical stability of the cream were analyzed using SPSS with a partial T test with a confidence level of 95% and the significance was considered significant if P <0.05. Meanwhile, the SPF value was analyzed based on the sunscreen protection category. The results showed that F1 and F2 had adequate physical stability. The SPF value test results are CT 7500; CT 9000, F1 and F2 showed no difference in the UV protection category. All groups showed extra category protective UV activity
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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