1,720,955 research outputs found
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
Modificazioni endocrino-metaboliche nella fase di transizione e nei primi mesi di lattazione.
No full textModificazioni endocrino-metaboliche nella fase di transizione e nei primi mesi di lattazione.
No full textMediterranean Italian buffalo young bull production. Note II: supplementation with vitamine E in the last growing phase.
No full textDespite its nutritional characteristics, buffalo meat is not highly required by the Italian market. One of the characteristics that is responsible for the low diffusion of buffalo meat in Italy, is represented by its earlier (4-5 days after cutting) darkening compared to bovine meat. This phenomenon is favoured by the same nutritional characteristics that make buffalo meat more suitable for some categories of consumers. The higher concentrations of Fe and unsaturated fatty acids in buffalo meat compared to bovine, are the main causes of the earlier qualitative deterioration, due to the oxidation following air exposition. Soon after death, auto-catalytic processes occur, such as lipid oxidation, that results in the production of free radicals that may be inactivated by Vitamin E. This Vitamin has also a protective role on the process of oxidation of oxyhaemoglobin to metahaemoglobin, that is the main factor responsible of colour alterations of the meat. The aim of this study was to verify if the administration of vitamin E per os is able to improve the macroscopic characteristics and the shelf-life of buffalo meat.
The trial was performed on 30 buffalo calves that were 403 days old and had an average live weight of 333 kg The animals were divided in 3 groups: 1) 1500 I.U. of vitamin E/die; 2) 600 I.U. of vitamin E/die; 3) control. Buffaloes were controlled until the live weight for slaughter (426 kg) and received the same diet (mixed hay and concentrate. 38%/62%) ad libitum. All buffalo calves were slaughtered between 102 and 123 days from the beginning of the trial. The carcase were kept at 8°C for four days after slaughter, and then processed and cut according to local habits and weighed. Samples of shoulder (Caput longum tricipitis brachii), loin (Longissimus dorsi) and buttock or rump (Semimembranosus) were sent to the meat laboratories T.M. Bettini and B. Ferrara of the DISCIZIA, to the DSA of Federico II University and to the Department of Chemistry and Alimentary Engineering of the UNISA. After dissection, some slices of shoulder clod were allocated containers at 4°C, without additives. In this paper the macroscopic characteristics of the meat samples after some days of storage are reported.
No differences in terms of both growth and meat yield at slaughter were recorded among the groups. Seven days after slaughter the slices of the subjects treated with 1500 I.U. of vitamin E were judged saleable, as well as those of the subjects treated with 600 I.U. of vitamin E, whereas the slices of the control group were considered at the end of their shelf-life. Eleven days after slaughter the slices of the subjects treated with 1500 I.U. of vitamin E were still judged saleable, whereas those of the subjects treated with 600 I.U. of vitamin E were considered at the end of their shelf-life. The slices of the subjects belonging to the control group were considered not saleable. The supplementation of the diet with 1500 I.U. of vitamin E throughout the trial (102-123 days) significantly prolonged the shelf-life of the meat compared to the samples of subjects treated with 600 I.U. and above all versus the samples of the controls. The cost of the treatment with 1500 I.U. of vitamin E was 0.86 and 0.30 € respectively for kg of meat and of live weight
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
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