1,720,966 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
Eco-friendly extraction of anthocyanins compounds from red radicchio by-products with natural deep eutectic solvents
No full textThe food industry requires novel green solvents to extract bioactive compounds, particularly regarding agrifood by-product valorization. Considering this, an eco-friendly ultrasound-assisted method for extracting phenolic compounds from the processing residues of red chicory of Treviso Precoce IGP using natural deep eutectic solvents (NaDESs) has been developed. Citric acid:choline chloride (1:2) was identified as the most suitable NaDES based on its stability and extraction capability towards phenolic compounds. Using a three-factor, three-level Box–Behnken experimental design combined with Response Surface Modeling, the maximization of polyphenol yield by optimizing the water percentage in NaDES, the ultrasound extraction time, and the citric acid: choline chloride molar ratio has been obtained. The maximum extraction yield (117.43 ± 0.33 and 2894 ± 0.22 μg/mL of chlorogenic and chicoric acids, respectively) was obtained by using a 3:2 citric acid:choline chloride molar ratio with 25% of water and by sonicating the extracts for 49 min. Considering the green nature, biodegradability, and low cost of NaDES, the obtained polyphenolic extracts are expected to offer advantages in industrial food and pharmaceutical applications, eliminating the need for expensive downstream purification steps
Isolated pulmonary langerhans cell histiocytosis: a diagnostic challenge in oncologic patients
Full text linkFrom fear to fork—exploring food neophobia and the inclination towards entomophagy in Italy
No full textThis study explored how sociodemographic factors, food preferences, and individual characteristics inf luence food neophobia and the acceptance of insect-based foods among Italian consumers. Findings revealed that age, monthly income, and education level significantly inf luenced food neophobia, while gender, age, and education level were associated with the propensity for entomophagy. Additionally, there was a correlation between food neophobia and the inclination towards entomophagy, indicating that more neophobic individuals were less willing to consume insects or insect-based foods. The research underscored the importance of prior experience with insect-based products, familiarity with entomophagy, species, and presentation form of insects in shaping consumer acceptance. Crickets emerged as the most popular insect species for consumption, with cricket f lour being the preferred form for incorporation, particularly in pasta and bakery products. Overall, the study underscores the importance of understanding consumer profiles and utilizing attractive insect species or developing appealing attributes for insect-based products to overcome psychological barriers and increase acceptance of entomophagy
Dietary Fibers Effects on Physical, Thermal, and Sensory Properties of Low-Fat Ice Cream
No full textThis study investigated the effect of incorporating dietary fibers, inulin, acacia, oat, and apple, in a low-fat vanilla ice cream. A significant increase in the ice cream mixture viscosity was observed with the addition of dietary fibers. Significant differences (p<0.05) were observed in the crystallization temperature when apple and oat fibers were used. Additionally, low-fat dietary fiber ice creams displayed statistically lower (p<0.05) glass transition and melting temperatures than full-fat ones, with the most pronounced reductions observed for samples enriched with acacia and apple fibers. Dietary fibers affected (p<0.05) the sensory profile of low-fat ice cream. However, inulin and acacia fibers samples showed a sensory profile comparable to the full-fat ice cream for nearly all attributes. These findings suggest that utilizing inulin and acacia fibers in low-fat ice cream yields characteristics of full-fat, underscoring the potential for crafting high-quality, reduced-fat ice cream products
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