1,720,980 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
Caratterizzazione chimica di oli di oliva raffinati e di prodotti di seconda lavorazione (repaso) offerti sui mercati nazionale e internazionale
No full textIn questo lavoro sono stati analizzati, per quanto riguarda alcuni parametri qualitativi (acidità libera, numero di perossidi ed alchil esteri) e compositivi (contenuto in aldeidi alifatiche a lunga catena), 15 campioni di olio provenienti dalla lavorazione delle olive reperiti sul mercato internazionale così suddivisi: 3 campioni di oli extravergini di oliva genuini di origine certa, 2 oli lampanti ed i 2 corrispondenti
oli raffinati, 4 oli prodotti dalla seconda lavorazione delle olive (repaso) e 4 raffinati di diversa provenienza. I risultati hanno mostrato l’assenza di alchil esteri tanto negli oli extravergini quanto in quelli raffinati, mentre il loro contenuto è risultato elevato negli oli lampanti (63-607 mg/kg) e repaso (416-1597 mg/kg). Per quanto riguarda lo squalene, il contenuto era ben evidente negli oli extravergini, mentre era molto inferiore tanto negli oli repaso quanto nei raffinati. Infine, sia negli oli repaso che in quelli lampanti è stata rilevata una concentrazione
più elevata, rispetto agli altri campioni, di aldeidi alifatiche a lunga catena. Future ricerche verranno condotte su un più ampio numero di campioni prendendo in considerazione oli lampanti di altre aree di provenienza (Italia e Paesi del Mediterraneo) così come campioni di oli ottenuti mediante diverse condizioni di raffinazione
Caratterizzazione chimica di oli di oliva raffinati e di prodotti di seconda lavorazione (repaso) offerti sui mercati nazionale e internazionale
No full textIn this work, quality (free acidity, peroxide and alkyl esters) and composition (long-chain aliphatic aldehydes) parameters were evaluated on 15 oil samples from olive processing, obtained from the international market. The samples were 3 genuine extra virgin olive oil samples of known origin, 2 lampante olive oils and 2 corresponding refined samples, 4 oils produced from second-olive processing (repaso) and other 4 refined olive oils. Alkyl esters were not found in either extra virgin olive oils or refined samples, whereas their content was high in lampant (63-607 mg/kg) and in repaso (416-1597 mg/kg) oils. Squalene was abundant in extra virgin olive oils, while its content decreased in repaso oils and was very low in refined samples. Finally, a higher content of long-chain aliphatic aldehydes was detected in lampante and repaso oils. These preliminary findings will be confirmed by the analysis of a larger set of samples taking into account lampante oils from different geographical proveniences (i.e. Italy and other Mediterranean countries) as well as samples undergoing different refining conditions
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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