1,720,954 research outputs found
IDENTIFICATION OF HISTOLOGICAL INDICATORS OF LARVAL/JUVENILE QUALITY IN MARINE FISH SPECIES
Get PDFThis PhD activity was conducted within the framework of the EU Horizon2020 funded project PerformFISH, which aims at increasing the sustainability and the competitiveness of Mediterranean gilthead sea bream (GSB, Sparus aurata) and European sea bass (ESB, Dicentrarchus labrax) farming. One of the main specific objectives is the improvement of predictability, quality and sustainability of the hatchery phase; in fact, the production of good quality larvae and juveniles is fundamental for the success of marine aquaculture, as the poor quality of juveniles affects growth performance, survival, technical viability and susceptibility to disease and infection both in the hatchery phase and in the subsequent grow-on stages. In this light, the aim of the thesis was to identify histological indicators that can be supportive for farmers in order to promptly recognize fish health problems and correct sub-optimal managerial practices to avoid losses. For this purpose, based both on a literature review, and on the previous experience of the research group, an original Multiparametric Semi-quantitative Scoring System (MSSS) specific for the histological evaluation of larval GSB and ESB was designed. It allows to obtain a complete histopathological view of a larval batch, also thanks application of an algorithm which synthesizes MSSS descriptors in a single Cumulative Histological Index (CHI). The construction of the MSSS is here explained in detail, with particular attention to the descriptors, the causes of their alteration in rearing conditions, and the criteria for the score assignment. The MSSS was applied on many GSB and ESB samples from 3 European farms, to test its applicability in a hatchery context and the ability to highlight the problems. It emerged that this tool could be a valid support for commercial hatcheries, both as internal quality control and or for the control of incoming fish. Finally, the MSSS was also used for larval evaluation during a thermal imprinting pilot test, which involved the application of 3 different thermal regimes during the autotrophic phase of GSB and ESB. This set had the dual purpose of verifying whether the water temperature applied in the early stages of embryonic development can affect the following development stages, and whether the MSSS can be effective also as a research tool in a controlled experimental setting. Although the MSSS proved to be valid for this purpose, and the differences found in the first stage evaluated are possible effects of the thermal regimes, it was not possible to define whether the differences found in the subsequent stages are equally attributable to these
ProtecTM improves innate immune response and specific antibody response against Lactococcus garvieae in rainbow trout (Oncorhynchus mykiss)
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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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