1,720,977 research outputs found
A scuola di acquariologia
No full textè presa in esame la legislazione in materia di commercio di pesci ornamental
L'anemia ferropriva del vitello e suoi risvolti economico-sanitari
No full textGli AA dopo aver richiamato le principali caratteristiche dell'allevamento del vitello a carne bianca in Italia, ne prendono in esame diversi aspetti alla luce di un'ampia rassegna bibliografica. Dapprima viene discussa la valutazione e l'interpretazione dei valori ematologici nel vitello con particolare riferimento alle modificazioni valori sierici dell'emoglobina nei primi mesi d'età; sulla base di queste informazioni scientifiche gli AA propongono alcune considerazioni critiche sul valore minimo di emoglobina posto dalla vigente normativa dell'UE. Successivamente è proposta una rassegna dei fattori in grado di influenzare lo stato anemico e le caratteristiche dell'anemia nel vitello a carne bianca con un approfondimento sui tenori minimi di ferro da integrare nel latte, sull'influenza sugli incrementi ponderali e sulla risposta immunitaria per trarre infine alcune conclusioni sulla rilevanza economico-commericiale di questi fattori
Indagine sul benessere animale in 793 allevamenti di bovini da latte nell'Italia meridionale ed insulare
Full text linkL’indagine sul benessere animale è stata condotta, tra il 2009 e il 2012, in 793 allevamenti di vacche da latte di 5 Regioni. Lo scopo è stato quello di valutare le condizioni di benessere degli animali attraverso la raccolta di informazioni rilevate in azienda e la compilazione di apposite schede (check list), mediante le quali è stato possibile attribuire punteggi relativi a diverse aree funzionali, generali e specifiche per le varie categorie produttive di animali. Al fine di consentire una valutazione del benessere basata non solo sui criteri minimi fissati dalla legislazione vigente ma comprensiva anche di altri aspetti di sicuro impatto sugli animali, le schede messe a punto comprendono sia parametri indiretti, volti a valutare le strutture e l’ambiente di allevamento e le modalità di gestione sia parametri diretti, idonei cioè ad analizzare e misurare gli effetti delle condizioni di allevamento sull’animale. Questo approccio ha consentito di cogliere appieno ed immediatamente i segnali sull’impiego delle animal-based mesures per la valutazione del benessere animale provenienti, come discusso in premessa, sul finire del 2009 a livello internazionale (OIE) e dell’UE ed ora accolti nel Piano strategico dell’UE per il benessere animale per il 2012-2015. Il risultato complessivamente ottenuto dovrebbe, pertanto, essere degno di una qualche attenzione a motivo non solo dell’ampiezza dell’indagine, fin ora priva di riscontri di pari dimensioni nel nostro Paese, ma anche per l’adozione di misure dirette del benessere animale su un campione non trascurabile di animali (complessivamente oltre 100.00)
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
Survey on animal welfare in nine hundred and forty three Italian dairy farms
No full textThe final results of a survey on welfare of dairy cows in 7 Italian Regions are presented. The study has been performed on 943 farms in southern and central Italy to highlight critical and strong points concerning animal welfare in dairy systems, by using direct and indirect criteria. To assess animal welfare, a checklist based on 303 parameters has been used; indirect criteria have been organised in 5 general areas concerning Farm management. Farming and housing systems, Environment, Feeding, Health and hygiene: other resource-based criteria were considered in 5 specific areas for the different productive categories (lactating cows, dry cows, pregnant heifers, cows comeback, calves up to 8 weeks and calves between 8 weeks and 6 months); finally, an Indicators section focused on animal based criteria. Parameters have been valued as conforming or not conforming on the basis of the current lesgislation on animal welfare, and in the other cases by the use of a semi-quantitative scale such as poor, satisfactory., good or very good referring to scientific literature and reports by the Animal Health and Animal Welfare panel of the European Food Safety Authority Among the 249 examined parameters (54 criteria have been valued as descriptive), 15 showed a failure prevalence inferior to 1%; for the remaining parameters, the overall non-compliance prevalence on the whole sample ranged from a maximum of 67% to a minimum of 2%, showing an inverse proportionality correlation with the herd size. One hundred and ten parameters were judged as poor (96) or not in compliance with the rules in force (14) in more than 10% of the examined herds. The most common non-compliance aspects detected in the different areas concern calves management, staff training and prophylaxis programmes; staff training levels were inversely related to failure prevalences in almost all areas. The combination of direct and indirect criteria has allowed to fully embrace recommendations on the use of animal based measures for the assessment of animal welfare, as accepted into the strategic Plan for the EU animal welfare for 2012-2015
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