1,720,959 research outputs found
TECNOLOGIA E CONTROLLO MICROBIOLOGICO DELLA “MRECA”, ALIMENTO TRADIZIONALE A BASE DI MUGIL CEPHALUS. [Technological optimisation and microbiological control of “Mreca”: a Sardinian traditional food based on Mugil cephalus]
No full textLa Mreca, alimento a base di muggine ( è un prodotto
tradizionale della Sardegna, la cui preparazione
artigianale presenta la peculiarità di utilizzare l’arbusto
Halimione portulacoides (L.) Aellen come involucro per
conservare i muggini dopo bollitura. La Mreca artigianale
non risulta conservabile a lungo. A questo scopo è stato
applicato un processo di trasformazione industriale che ha
tenuto conto sia dei parametri tradizionali, come l’impiego
del H. portulacoides sia di alcune azioni (trattamenti
termici adeguati) necessarie per l’ottenimento di un
prodotto sicuro.
Sui campioni di Mreca ottenuti con la tecnologia industriale
è stata valutata la presenza e l’evoluzione dei microrganismi
indicatori di igiene e di sicurezza verifi candone la shelf-life.
I risultati hanno mostrato l’idoneità della tecnologia
industriale proposta e l’effi cacia del trattamenti termici
eff ettuati sui muggini durante la preparazione della Mreca
che ne consentono un aumento signifi cativo della shelf
life. È stata, inoltre, evidenziata la necessità di ridurre
ulteriormente la carica batterica da parte della pianta in
quanto potenzialmente responsabile di ricontaminazione
durante il confezionamento e la conservazione.Mreca is a traditional food from Sardinia. It is made
with Mugil cephalus traditionally prepared by using the
Halimione portulacoides shrub as a casing during storage.
Mreca, thus produced, is storable only for a few days. For
this reason it has become mandatory to develop a new
industrial process to lengthen the shelf life of this product. In
this work, an industrial process transformation was applied
that took into account traditional parameters such as the
use of H. portulacoides and implemented new actions as
appropriate heat treatments and vacuum packaging. In all
industrial Mreca samples hygiene and safety parameters
were evaluated.
The results showed the eff ectiveness of the heat treatments
carried out on M. cephalus during the preparation of Mreca
and the potential recontamination by H. portulacoides
during the packaging and storage
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
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