1,721,032 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
La caratterizzazione analitica del formaggio Fontina sulla base della sua composizione in amminoacidi liberi
No full textLa composizione in amminoacidi liberi del formaggio Fontina è stata studiata su 80 campioni di origine nota e rappresentativi delle diverse condizioni produttive (zona e periodo di produzione, caseificio, durata della stagionatura), nonché su 21 campioni reperiti in commercio. La possibilità di differenziare questo formaggio da prodotti similari sulla base di parametri oggettivi è stata valutata analizzando anche 24 campioni di formaggio Fontal di diversa origine.
L’elaborazione statistica dei dati ha consentito di individuare nel rapporto (GLN+TYR)/(ILE+LYS+GABA) un parametro analitico capace di differenziare (P<0.01) il formaggio Fontina dal Fontal a qualunque stadio di stagionatura. Viene inoltre evidenziato il ruolo chiave della microflora nativa del late nel determinare le caratteristiche di tipicità della Fontina
Gli amminoacidi liberi nella caratterizzazione analitica del formaggio Grana Padano
No full textViene studiata la possibilità di caratterizzare il formaggio Grana Padano (G.P.) attraverso la determinazione del contenuto quali-quantitativo di amminoacidi liberi (AALIB).
Le analisi condotte su 60 forme di G.P. tradizionale e di età compresa tra 10 e 209 mesi hanno evidenziato ampie variazioni del quadro in AALIB, espresso sulle proteine totali, anche per campioni con lo steso periodo di stagionatura. A differenza di quanto riscontrato per il formaggio Parmigiano-Reggiano, risulta impossibile correlare l’età del G.P. con il suo contenuto in AALIB. Una maggiore omogeneità è invece osservata per la composizione in AALIB espressa in percentuale relativa, soprattutto per campioni con pari “intensità proteolitica”. Ciò consente di individuare un modello chemometrico bidimensionale atto a caratterizzare il formaggio Grana prodotto con tecnologie non tradizionali e basato sull’elaborazione matematica del contenuto relativo di alcuni AALIB.
Determinazioni condotte su 29 campioni di formaggio Grana prodotto con tecnologie non tradizionali o di provenienza estera confermano la capacità del modello proposto di discriminare il G.P. da formaggi merceologicamente simili.The free amino acid (FAA) patterns of 60 samples of traditional Grana Padano cheese (G.P.) of known age (10-20 months) and origin were determined by IEC with post-column ninhydrin derivatization.
In G.P. the total amount of FAA rapidly reaches high levels (18.3% on cheese protein at 10 months of ripening, 22.2% at 20 months), although great differences are observed among the patterns of samples with the same ripening period and produced by different dairies. Nevertheless, the relative amounts of several FAA appear highly constant, particularly in samples containing the same total amount of FAA. It is possible to define 2 analytical parameters, based on the relative content of ASP, GLU, ASN, HIS, GLY, THR, TYR, MET LEU, LYS (Variable I) and on the relative content of SER, GLN (Variable II) which allow to point out a two-dimensional chemometric model suitable for distinguishing traditional G.P. from similar cheeses.
Results obtained according to the proposed chemometric model and related to Grana cheeses produced under different technological conditions are reported
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
- …
