1,720,960 research outputs found
Applicability of different test day models and effect on time at first evaluation of Italian Simmental bulls
No full textIl presente lavoro si prefigge di valutare l’effetto che l’ap- plicazione di diversi modelli test day esercita sul numero di bovine e d’allevamenti coinvolti nel pro- gramma di valutazione, sul numero di tori valutati e sull’età degli stessi alla prima valutazione in una popolazione bovina a ridotta dimensione aziendale. L’applicazione di modelli univariati e multivariati a regressioni casuali comporta una notevole riduzione del numero di bovine e d’allevamenti che apportano informazioni fenotipiche. Tale perdita determina un aumento dell’età alla prima valutazione dei tori che si ripercuote sul progresso genetico annuo
Comparison between methods of measurement of milkability in Italian dairy cows reared in mountain area
No full textGenetic aspects of milk electrical conductivity in Italian Brown cattle
No full textElectrical conductivity (EC) of milk is defined as an indicator of the udder health. The EC is a low cost and easy recordable
information in dairy herds with automatic milking systems. The heritability of EC showed to be higher than somatic
cell count and for this reason might be an useful trait for indirect selection for mastitis resistance. The heritability for
EC in Italian Brown cattle was equal to 0.23. Therefore, EC could be useful not only for dairy cows management but
also for selection of dairy cows. The high correlation between breeding values for SCC and EC is promising in order for
improving mastitis resistance and functional ability of dairy cows
Sources of variation of milk rennet-coagulation ability of five dairy cattle breeds reared in Trento province
No full textA total of 506 samples of bulk tank milk from morning and evening milkings were analyzed to assess the milk rennet-coagulation ability. Data from the following dairy breeds reared in 55 herds of Trento province, were available: Holstein Friesian (8 herds), Brown (16 herds), Simmental (10 herds), Rendena (13 herds) and Alpine Grey (8 herds). Minimum and maximum number of samples per herd was 4 and 12, respectively. Traits analyzed were: coagulation time in minutes (R), curd-firming time in minutes (K20) and curd firmness in millimeters (A30). Mean and standard deviation for R, K20 and A30 was: 15.90 ± 3.26, 6.13 ± 2.52 and 24.03 ± 6.95, respectively. Analysis of variance was performed using a GLM procedure (SAS package) in order to study the effect of the following sources of variation: breed, herd, recording season, class of milk yield, fat and protein percentage, acidity, urea, bacterial count, clostridia contamination, somatic cell count, herd average days in milk and herd average age at calving. Breed resulted one of the most important sources of variation analysed; other results will be discussed
Comparison between two methods of measurement of milking speed in dairy cattle reared in Trento province
No full text
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
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