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Origin assignment of milk from Alpine regions by multielement stable isotope ratio analysis (SIRA)
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Multielement (H, C, N, O, S) stable isotope characteristics of lamb meat from different Italian regions
No full textThe study focuses on the 2H/H, 13C/12C, 15N/14N, 18O/16O and 34S/32S values of defatted dry matter
(DFDM) and on the 2H/H, 13C/12C and 18O/16O values of the fat fraction of meat samples from various
lamb types reared in seven Italian regions, following different feeding regimes (forage, concentrate,
milk). The 13C/12C (r1⁄40.922), 2H/H (r1⁄40.577) and 18O/16O (r1⁄40.449) values of fat and DFDM are
significantly correlated, the fat values being significantly lower for C and H and higher for O than for
DFDM values and the differences between the two fractions not being constant for different lamb
types. The feeding regime significantly affected the 13C/12C, 15N/14N, 18O/16O and 2H/H of fat. The
DFDM 2H/H, and 18O/16O values, excluding an outlier, are significantly correlated with the corresponding
values in meteoric waters, thus allowing us to trace the variability of geoclimatic factors.
15N/14Nis influenced by pedoclimatic conditions, whereas 34S/32S is influenced by the sea spray effect
and the surface geology of the provenance area. By applying stepwise linear discriminant analysis
only the 2H/H of fat was found not to be significant and 97.7% of the samples were correctly assigned
to the lamb type and more than 90% cross-validated. With the feeding regime, 97.7% of the samples
were both correctly assigned and cross-validated using a predictive model including
13C/12C, 15N/14N, 18O/16O, 34S/32S of DFDM and 18O/16O of fat
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Influence of the distillation step on the ratios of stable isotopes of ethanol in cherry brandies
No full textDispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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