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Riflessioni su costo opportunità del capitale e premi per il rischio
Full text linkRiflessioni su costo opportunità del capitale e premi per il rischi
Principi di finanza aziendale
No full textGl interventi per la nuova edizione hanno riguardato l'aggiornamento e l'arricchimento dei dati e i cambiamenti giuridici, fiscali e istituzionali che hanno interessante la finanza in italia negli ultimi cinque anni
Influence of micellar calcium and phosphorus on rennet coagulation properties of cows milk
No full textThe main requirement for milk processed in most cheese typologies is its rennet coagulation ability.
Despite the increasing number of studies, the causes for abnormal coagulation of milk are not fully
understood. The aim of this study was to ascertain relationships between milk characteristics
and its rennet coagulation ability, focusing on the influence of calcium (Ca) and phosphorus (P).
Ca and P are essential constituents of the micelles. Micellar P can be present as part of colloidal
calcium phosphate (inorganic-P) or covalently bound to caseins as phosphate groups (casein-P).
Eighty one herd milk samples (SCC<400000 cell/ml) were classified as Optimal (8), Suboptimal (39)
Poor (29) and Non-coagulating milk (5), according to their rennet coagulation parameters as assessed
by lactodynamographic test. Samples were analysed for their chemical composition (basic
composition, protein fractions, minerals and salt equilibria), physicochemical parameters (pH and
titratable acidity) and rheological properties. Optimal milk was characterised by the highest contents
of major constituents, protein fractions and minerals, lowest content of chloride and highest values
of titratable acidity. Non-coagulating milk was characterised by the highest values of pH and
the lowest of titratable acidity. At micellar level, Optimal milk showed the highest values of colloidal
Ca, casein-P and colloidal Mg (g/100 g casein), while Non-coagulating milk showed the lowest
values. Interestingly, there was no statistical difference regarding the content of colloidal inorganic-P
(g/100 g casein) between Optimal and Non-coagulating milks. Overall, high mineralisation of the
micelle (expressed as g inorganic-P/100 g casein) positively affect its rennetability. However,
excessive mineralisation could lead to a reduction of the phosphate groups (g casein-P/100 g casein)
available for curd formation
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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