1,721,023 research outputs found
La copertura dei rischi finanziari nelle imprese non finanziarie italiane attraverso gli strumenti derivati
No full textUse of a portable NIR instrument as a rapid tool for cattle feeding control.
No full textAvoid feed sorting and providing a homogeneous ratio is a crucial
aspect of cattle feeding. We evaluated Near Infra-Red (NIR) as a
tool for assessing TMR’s homogeneity (Hi), animals’ sorting (Si)
and their relationship with mixer wagon (MW) and ration
features. A dataset of 311 TMR samples was split into 55% testing
and 45% validation sets. Samples were analyzed for chemical
composition, particles size (PS) distribution through a 6-strata
sieve and geometric mean length (GML). A portable NIR
instrument was calibrated in a range of 902–1660 nm on the
testing set by a partial least square (PLS) algorithm and validated on the training set (v). An observational open cohort study of 19
dairy farms was conducted over two years. MW characteristics,
TMR formulation, and milk yield were collected through a survey
and TMR analysis was performed by NIR. The Hi (range 0–100%,
100 = perfect homogeneity) was calculated as the weighted sum
of the standard deviation to mean ratios of TMR composition
recorded along the feed alley at 16 points. In these 16 points, the
Si (range 0–1, 0 = no selection) was calculated by comparing
values of fresh distributed TMR with those collected after 2 h from
feed distribution, by a t-test and a weighted coefficient correction.
Parameters used for Hi and Si calculation were PS =3.8 and
1.8 mm, pan, GML, crude protein (CP), aNDF, and starch. The
median was used as a threshold for Hi and Si binary classification
as inhomogeneous (Ibhi, Hi ≤79%) or homogeneous (Hbhi), and
as negligible selection (NSbsi ≤0.30) or evident selection (ESbsi).
Logistic and linear models assessed the outcomes (Hi–Si) for
predictors. ROC curves were drawn. In NIRs calibration, the
coefficient of determination of validation (Rv2) was 0.95, 0.74,
0.93, and 0.82 for DM, CP, aNDF, and starch, respectively. The PS
traits showed all Rv2 between 0.68 and 0.82. The logistic
regression for binary Hi showed odds =1.72 (p = .03) and 0.39
(p = .06), Akaike’s information criterion (AIC) = 16.6 and 20.8,
Area under the curve (AUC) = 0.89 and 0.79 for DM and aNDF,
respectively. The Hi regressed for MX load fullness with intercept
=96.0, coefficient = −0.19, adjusted R2 = 0.374 (p = .02). The
logistic regression for binary Si showed odds =2.57 (p = .06), AIC
=19.5, AUC =0.82 for aNDF. These findings confirm NIR as a
reliable instrument for at farm TMR analysis and suggest a
relation between aNDF and both Hi and Si and between DM and
MX load with Hi
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
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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