1,720,973 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
Bioactive compounds of fresh tea shoots plucked in different seasons: Optimization of extraction of polyphenols
Get PDFIn this study, the effects of harvest year and period on the total polyphenol (TP), radical scavenging activity (RSA), total flavonoid (TF) and ascorbic acid (AA) contents of fresh tea leaves were investigated. Extraction of polyphenols from the tea leaf was optimized using the response surface methodology (RSM). The effect of the independent variables ((solvent concentration, extraction time and solid to solvent (S/S) ratio)) on TP and RSA was studied using Box-Behnken design (BBD). The results showed that extraction parameters selected were significant in the extraction procedure regarding TP and RSA (p < 0.05). The optimum extraction conditions were obtained as 1/60.86 of S/S ratio, 84.65% of ethanol concentration and the extraction time of 50 min. As a result of the extraction of tea leaves under optimum conditions, the TP, RSA and TF contents of the leaves harvested in September in 2020 were found to be higher. In addition, the individual phenolic compounds of these leaves were analyzed by high performance liquid chromatography (HPLC) and epigallocatechin gallate (EGCG) was detected the most (57.52 mg/g DM). After in-vitro digestion of the same samples, TP and RSA values were significantly decreased, mostly at intestinal stage (p < 0.05), and the bioaccessibility of the polyphenols was determined as 48.98%. As a result of AA analysis by HPLC of the, the highest contents for 2019 and 2020 were observed in the leaves harvested in May (41.92 mg/100 g DM) and those in July (38.55 mg/100 g DM), respectively
Assessment of cactus pear leather (pestil) as a new snack food
No full textIn this study, selected nutritional and functional properties of cactus pear and cactus pear leather (pestil) processed with different dryers (oven type and pilot scale tray dryers) were evaluated. For this aim, the fruits collected from three different districts of Turkey were processed and the most suitable region and processing method were investigated. Processing with different dryers had significant (p 0.05) affected from different dryers. Pestil obtained by tray drying gave the highest rate for the taste. According to the results, the fruits collected from the Aegean region of Turkey were more convenient for processing. Because there is a limited number of studies on this fruit, data provided in the present study may also contribute to further studies
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
Nar ekşilerinin bileşimi üzerine bir araştırma
No full textIn this study, seven different brands of pomegranate molasses purchased from the local markets of Bursa, Turkey, were analyzed for the chemical components, some of which are important for nutrition and health. Four samples were found to contain glucose syrup, one of which was found to have very high amount of hydroxymethylfurfural (1524.98 mg/kg). Analyses showed that protein, invert sugar, total sugar and total polyphenol contents of the samples were ranged 0.08-1.54 g/100g, 21.60-57.60 g/100 g, 44.80 - 65.3 g/100 g and 551.61-9695.17 mg/kg, respectively, while the antioxidant activity of the samples were found to be between 0 to 46.31%. The samples were also found rich in minerals e.g. potassium (450-4700 mg/100g), calcium (71.88-1803.63 mg/100g), magnesium (7.48-409.10 mg/100g) and iron (1.05-22.99 mg/100g). As some of the components were found in more amounts than the limits of the relevant standard, it is suggested that the production techniques for pomegranate molasses should be improved and optimized.Bu çalışmada, Bursa piyasasındaki marketlerden temin edilen 7 farklı marka nar ekşisinin kimyasal bileşimi ve insan beslenmesi ve sağlığı açısından önem taşıyan bazı bileşenler analiz edilmiştir. Sonuçta, 4 farklı marka nar ekşisinin glikoz şurubu içerdiği; bunlardan birinin oldukça yüksek hidroksimetilfurfural içeriğine (1524.98 mg/kg) sahip olduğu ortaya konmuştur. Aynı zamanda nar ekşilerinin 0.08-1.54 g/100g arasında protein, 21.60-57.60 g/100 g arasında indirgen şeker, 44.80-65.3 g/100 g arasında toplam şeker, 551.61-9695.17 mg/kg arasında toplam polifenol içerdiği; % 0 - 46.31 arasında antioksidan aktiviteye sahip olduğu saptanmıştır. Nar ekşilerinde yüksek düzeyde mineral madde bulunmuş, örneklerin sırasıyla potasyum (450-4700 mg/100g), kalsiyum (71.88-1803.63 mg/100g), magnezyum (7.48-409.10 mg/100g) ve demir (1.05-22.99 mg/100g) yönünden zengin olduğu ortaya konmuştur. Bu çalışmadan elde edilen verilere göre, piyasada bulunan nar ekşilerinin bazı bileşenler bakımından ilgili standartta yer alan limitlere uygunluk göstermediği; dolayısıyla üretim tekniklerinin iyileştirilmesi ve optimize edilmesi gerektiği sonucuna varılmıştır
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
- …
