1,720,955 research outputs found
Influenza della numerosità del gruppo sulle performance di suinetti in postsvezzamento.
No full textIn order to evaluate the effect of group size on post-weaned piglet performance, two 42 d-trials were carried out in two farms situated in Montecastrilli (TR) and in Perugia.
In the first trial 108 piglets, coming from 12 crossbred sows artificial inseminated with the semen of the same boar, were used.
Piglets were weaned at 28,0 d ( 2,1) and divided in 3-two flat-deck cages groups; all the cages were placed in the same room. In each cage of the same group 9 (group A), 18 (group B) and 27 (group C) piglets were housed. The groups were made homogeneous for genetic type, sex (barrows and gilts), body weight, floor-area allowance (0,25 m2/piglet), nipple drinker num-ber/piglet (1/9) and feeder-trough space. The animal were fed ad libitum with pelleted feed. The piglets were weighed at the start and at the end of the trial and every two weeks. At the same time the food consumption of every group was pointed out.
The second trial were performed using 100% Large White piglets. The animals, weaned at 26,6 d ( 1,9), were subjected to the same experimental design employed in the first trial, except-ing the diet, that had a different composition.
The growth performance of the piglets during the tests in Montecastrilli and in Perugia showed no significative differences between the groups in comparison. In fact at the end of the research the daily gain was between 447 g (group B) and 439 g (group C) in the first test, and be-tween 405 g (group A1) and 396 g (group B1), in the second test. Also the feed efficiency ratio showed lightly different values between the groups, because of the few data: 1,63 (group B), 1,54 (group C) in the first test and 1,58 (group B1) and 1,46 (group A1) in the second test. About the behaviour and the health conditions of the animals no big differences between the groups were noticed
Impiego di probiotici nell'alimentazione del suinetto
No full textEffect of probiotics in the piglet feeding
A research, using post-weaning piglets, was carried out to evaluate the effects of probiotic Biomate 2Bpuls, containing in equal parts Bacillus subtilis and Bacillus licheniformis. Forty animals weaned at an a average age of 28 ± 0,25 days were divided into four homogeneous groups according to age, weight, sex, genotype of provenience and were housed in individual flat-deck cages of 0,48 m2 and supplied with a holed plastic floor. The cages, were put in a common room and were provided with feed trough and nipple drinker. The animals were fed ad libitum with the following diet: group C (standard diet, control group), group A (standard diet added with probiotic at 400 g/ton), group P700 (standard diet with probiotic at 700 g/ton). The trial went on for 42 days, each tow weeks the animals were singularly weighed and at the same time feed consumption was verified. During the last week of the experiment, on five animals in each group, the ingesta-excreta balance was carried out with the grab-sampling method, using the insoluble ashes as internal indicator. Moreover, during the last day of experimentation, on four animals in each group blood samples from jugular vein and faeces from rectal canal were taken to perform haematic and microbiological analysis respectively. The results of breeding performance, all through the trial, pointed out that the average daily weight gain ranged from 527 g/d (group C) and 548 g/d (group P400), with a significant difference for P<0,05, while for feed efficiency the limit values were 1,99 (group A) and 1,92 (group P700). The slight better results were furnished by piglets fed with probiotic. The letter results agree with those obtained from the digestibility trial, where the digestive employ of dry matter, organic matter and energy was slightly better in P400 and P700 groups. The microbiological analysis of faeces pointed out the great reduction of lactobacillis and coliforms, due to the ingestion of probiotic. As to haematic parameters, there emerged the absence of any effects of probiotics on triglycerids and colesterol values. Finally, the health status of piglets was good, as witnessed by the absence of diarroic events and survival of all animals
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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