1,720,989 research outputs found
Vitamin and water requirements of dairy sheep
No full textThe authors review the physiological role and the daily requirement of fat-soluble vitamins (A, D, E and K), vitamin C and water in dairy sheep. Regarding the vitamins, classical clinical symptoms and/or non-specific parameters, such as lowered production and reproduction rates are associated with their deficiencies or excesses. Until the last decade, these compounds were considered important only for the prevention of such alterations; currently, there is more emphasis on their function as the vitamins can play a key role in optimising animal health. In this respect, of particular interest is the action of the antioxidant vitamins (especially vitamin C, vitamin E and beta-carotene) in improving the efficiency of the immune system
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
A review on the use of agro-industrial CO-products in animals’ diets
No full textThe use of agro-industrial co-products in animal nutrition could represent an opportunity to reduce the environmental impact of the food production chain. Co-products can decrease the feeding cost and improve animal products in terms of quality and sustainability. To evaluate the use of co-products as animal feed, 57 studies published in the last 11 years on agro-industrial residues were considered. In vitro trials demonstrated that some co-products, such as ginseng meal, grape pomace and olive cake, in animal diets could affect fermentation parameters decreasing the gas production, particularly the methane emission. Indeed, thanks to their chemical composition and the presence of some bioactive compounds, such as tannins, these co-products seemed able to modify the ruminal and the intestinal environment and consequently fermentation kinetics and end-product. Furthermore, fruits, vegetables and oil extraction co-products could be valid sources of energy, fibre and protein, respectively. The remaining studies, conducted in vivo on different animal species, evidenced as some fruits and oil extraction co-products (e.g., prickly pears, olive, and hemp cake) could improve milk and/or meat fatty acid profile. Moreover, the antioxidant compounds of these co-products could have beneficial effects on gut microbiota and animal health status. The replacement of traditional feedstuffs with agricultural or industrial co-products could represent an interesting prospect for animal production. However, it is important to individuate the right dosage of supplementation in the animal diet, considering that all fruit and vegetable residues showed high variability in chemical composition.Highlights Reduce animal production environmental impact Increase animal welfare Reduce nutritional cost
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
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