1,720,960 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
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
Profil Release Enkapsulasi Antosianin, Flavonoid dan Fenolik pada Kulit Semangka Menggunakan Metode Spray Drying
Get PDFDaerah Istimewa Yogyakarta merupakan salah satu daerah yang memiliki potensi bencana alam yang cukup tinggi. Makanan adalah bahan habis pakai yang paling dibutuhkan saat bencana alam terjadi. Untuk menjaga makanan bergizi yang akan didistribusikan ke korban bencana alam tetap layak untuk dimakan, diperlukan suatu adanya alternatif berupa pengawet alami makanan. Dalam penelitian ini, dipilih kulit semangka sebagai bahan untuk membuat pengawet alami karena mengandung flavonoid dan antosianin. Tujuan penelitian ini adalah untuk mengetahui banyaknya kandungan total antosianin, flavonoid dan fenolik pada kulit semangka merah serta mengetahui pengaruh komposisi kitosan terhadap kemampuan pelepasan antosianin, flavonoid dan fenolik pada makanan. Penelitian ini dilakukan dengan metode ekstraksi dan enkapsulasi. Pada proses enkapsulasi digunakan teknik spray drying. Analisa yang dilakukan antara lain pengujian analisis kandungan Total Antosianin (TA), Total Flavonoid (TF) dan Total Fenolik (TPC) di dalam supernatant, serta analisa uji in vitro (uji kemampuan pelepasan flavonoid dan fenolik) pada makanan. Kandungan total antosianin pada kulit semangka merah sebesar 0,1113 mg/L. Kandungan total flavonoid pada kulit semangka merah sebesar 0,6159 g/mL. Kandungan total fenolik kulit semangka merah sebesar 0,3410 g/mL. Pada uji in vitro untuk senyawa flavonoid maupun fenolik, terjadi ketidakstabilan pelepasan kadar flavonoid dan fenolik terhadap waktu pada variasi kitosan 0,4 gram, 0,5 gram, dan 0,6 gram. Namun dari hasil rata-rata pelepasan kadar flavonoid dan fenolik, yang paling tinggi terjadi pada variasi kitosan 0,6 gram, dengan masing-masing nilai yaitu untuk flavonoid 0,1172 gram/mL dan untuk fenolik 0,0867 gram/mL. Hal ini menunjukkan bahwa semakin tinggi kadar kitosan, maka pelepasan kadar flavonoid dan fenolik juga meningkat
PENGARUH KONSENTRASI K2SO4TERHADAP DRUG LOADING ASAM SALISILAT PADA PECTIN EDIBLE FILM
No full textWaste from orange peel contains pectin that can be utilized as raw material to produce drug delivery system membrane for various types of drugs. Drug loading and release behavior of the membrane can be controlled by adding crosslinker (K2SO4). This research aimed to study the effect of crosslinker composition to the salicylic acid loading as an example of antibiotics. Pectin was dissolved in water, mixed with plasticizers and the variation of K2SO4 solution were 0, 0.1, and 0.2 g / mL at temperature 66°C. The mixture was dried in an oven at temperature 50°C for about 15 hours. The analysis have been done were drug loading, gel sweeling and FTIR. The results show that the more concentration of crosslinker added, the loading of salicylic acid were influenced in range 0.031 – 0.045 g/mL. The parameters estimated by adding K2SO4 crosslinker were gel swelling in range 0,11-0,29 g, whereas FTIR analysis has not significant changein each concentration
Characteristic of ascorbic acid in crosslinked chitosan edible film as drug delivery system membrane
No full textChitosan is a polysaccharide compound in the form of a linear polysaccharide consisting of N-acetyl glucosamine (GlcNAc) and D-glucosamine (GlcN) monomer, which is a derivative of deacetylization of chitin polymer. Chitin is one of common type of polysaccharide on earth after the excess cellulose from inveterbrata skeletons. Chitosan has anti-microbial properties. Based on this properties, chitosan is potentially used to be an edible film as drug delivery system membrane. Edible film was made by dissolving chitosan in 100 mL acetic acid 1%, then the plasticizer and crosslinker was added while heated at 60° C. It was molded and dried in oven at 50°C for 48 hours. Drug loading in the edible film could be controlled by remodeling membrane characteristics in the presence of crosslinker additions. The purpose of this study was to estimate the mass transfer coefficient (kCa) of drug loading in various concentrations of ascorbic acid in the edible film. The characteristics of ascorbic acid in chitosan edible film could be seen from the number of drugs that could be loaded through the uv-vis spectrophotometric analysis. The higher concentration of ascorbic acid was added, the drug would be loaded more into edible film
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