1,720,962 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
PEMBUATAN EDIBLE FILM DARI GELATIN TULANG IKAN NILA (Oreochromis niloticus) DENGAN PENAMBAHAN KARAGENAN
Full text linkPEMBUATAN EDIBLE FILM DARI GELATIN TULANG IKAN NILA (Oreochromis niloticus) DENGAN PENAMBAHAN KARAGENA
PENGARUH PENAMBAHAN AMMONIUM KARBONAT PADA PEMBUATAN KATALIS CAO SUPERBASA DARI CANGKANG TELUR AYAM
Full text linkCangkan telur ayam yang dihasilkan di kabupaten kutai kartanegara sebesar 191,472 kg pada tahun 2015. Cangkang telur ayam dapat digunakan sebagai bahan baku dalam pembuatan katalis CaO hal ini disebabkan cangkang telur ayam memiliki kandungan CaCO3 yang tinggi. Penelitian ini bertujuan untuk mengetahui pengaruh variasi konsentrasi ammonium karbonat (NH4)2CO3 terhadap kadar CaO dan kebasaan katalis CaO dari limbah cangkang telur. Proses pembuatan katalis CaO superbasa diawali pembersihan cangkang telur, pengeringan dan pengecilan ukuran partikel sampai ukuran -200+325 mesh lalu dikalsinasi, hasil kalsinasi selanjutnya direndam dengan variasi konsentrasi amonium karbonat 0,12 g/ml, 0,23 g/ml, 0,35 g/ml, 0,46 g/ml, 0,57 g/ml dan, 0,69 g/ml selama 30 menit, kemudian dikeringkan dengan cara dioven lalu dikalsinasi pada temperatur 950oC. karakterisasi katalis meliputi uji kristalinitas dengan XRD, uji struktur dan morfologi dengan SEM-EDS dan uji kebasaan. Hasil penelitian menunjukkan katalis CaO superbasa memiliki derajat kristalinitas sebesar 96,64%, kadar CaO sebesar 96,85%, kekuatan basa (H-) 9,3 dengan jumlah situs basa 7,866 mmol/g pada konsentrasi ammonium karbonat 0,57 g/ml.Kata kunci : Cangkang telur ayam,CaO superbasa, katalis, kalsinas
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
PROTEKSI KOROSI PADA BAJA API 5L DENGAN INHIBITOR ORGANIK EKSTRAK DAUN BAWANG DAYAK (Eleutherme Americana Merr) DALAM LINGKUNGAN HCL 0,5 M
Full text linkCorrosion is a decrease in metal quality due to an electrochemical reaction with its environment. Many factors can cause corrosion of a material. One of them is due to the influence of the concentration of chloride acid dissolved in water media so that the environment is corrosive (acidic). Corrosion can occur in various forms, ranging from uniform corrosion on the entire metal surface to corrosion that is concentrated in certain parts. There are many methods to inhibit the corrosion process. One of the many methods is the use of inhibitors. Organic inhibitor is a type of inhibitor that is non-toxic, inexpensive, readily available in nature, easy to renew and does not damage the environment. These organic inhibitors are obtained by extracting some materials that exist in nature. In this study, the inhibitor used was Dayak leek. The inhibitor is used on API 5L steel material in 0.5M HCl media. The method used to retrieve the steel corrosion rate data using the weight loss method. The inhibition efficiency reached 99.02% for the addition of an inhibitor with a concentration of 5% with an immersion time of 10 days with a corrosion rate of 4.46 mpy
PENGARUH RASIO MOL D AN WAKTU REAKSI PADA SINTESIS BIODIESEL DARI MINYAK JARAK DENGAN MENGGUNAKAN KATALIS CaO/Al2O3
Full text linkPENGARUH RASIO MOL D AN WAKTU REAKSI PADA SINTESIS BIODIESEL DARIMINYAK JARAK DENGAN MENGGUNAKAN KATALIS CaO/Al2O
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