1,720,963 research outputs found
Infezione sperimentale di pecore con Mycoplasma agalactiae. Rilievi clinici, batteriologici e sierologici
No full textLa PCR come mezzo di identificazione dei fattori di virulenza di Bacillus anthracis. Dati preliminari sull’analisi del ceppo vaccinale “CARBOSAP” utilizzato nelle campagne vaccinali contro il carbonchio ematico ovino e bovino in Italia
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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
La paratubercolosi negli ovini e caprini I: prolegomeni allo studio delle cause predisponenti a questa malattia
Full text linkLa paratubercolosi, o enterite paratubercolare (conosciuta anche come malattia di Johne), è una patologia infettiva ad andamento cronico sostenuta da Mycobacterium avium subsp. paratuberculosis (MAP). È diffusa ovunque si pratichi l’allevamento ovino e caprino, rappresentando una delle malattie infettive più importanti per i danni arrecati agli allevamenti. Alla diffusione del MAP hanno contribuito specifici fattori gestionali, ma soprattutto la commercializzazione incontrollata di animali, con conseguente aumento dell’incidenza della malattia e prevalenza di allevamenti infetti ormai variabile tra il 7 ed il 60% su scala mondiale. In questo quadro si colloca il progetto PON “EpiSud-Programma per lo sviluppo di metodologie per l’identificazione ed il controllo di infezioni micobatteriche animali”, che vede il Parco Tecnologico Padano come proponente e l’Istituto Zooprofilattico della Sicilia nonché l’Università degli Studi di Bari Aldo Moro (DETO-Sez. Cliniche veterinarie e Produzioni Animali) in qualità di partner. L’Università di Bari, in particolare, sta conducendo un’indagine epidemiologica in Puglia su allevamenti estensivi ovini e caprini al fine di studiare la prevalenza della malattia ed i fattori di rischio scatenanti l’infezione in relazione alle pratiche gestionali adottate dagli allevatori. L’indagine è ancora in fieri ed è prematuro trarre conclusioni circa i dati epidemiologici; è tuttavia possibile, ancorché su dati parziali, avanzare ipotesi circa i fattori di rischio. Data la natura complessa di detti fattori, per l’analisi è stato scelto un approccio multivariato, cosicché nel presente lavoro si riportano i risultati dei primi dati raccolti mediante la somministrazione agli allevatori di un’apposita scheda aziendale, redatta al fine di reperire una serie di informazioni di carattere strutturale, igienico-sanitario e gestionale
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
Development of a Western blotting assay to discriminate Brucella spp. and Yersinia enterocolitica O:9 infection in sheep
No full textEpidemiology and risk factors of Mycobacterium avium subspecies paratuberculosis in semi-extensive dairy sheep and goat farms of Apulia, southern Italy
Full text linkParatuberculosis (PTB) is a well-documented chronic and sometimes fatal infection that affects the small intestine of ruminants both in captive and free-ranging living conditions. Although the infection has been detected on small ruminant farms worldwide, epidemiological and risk factor information regarding Mycobacterium avium subspecies paratuberculosis (MAP) infection on semi-extensive sheep and goat farms is generally still scarce, particularly in the Mediterranean area and in Italy. This paper reports the epidemiological findings and risk factors of the infection on semi-extensive sheep and goat farms in Apulia. It particularly focuses on the involvement of biological, structural and management factors, as well as the farmers’ socioeconomic data as predisposing causes of PTB, and investigates their possible connection with the survivability of the infection. The true seroprevalence values of MAP on semi-extensive Apulian sheep and goat farms are reported and the risk factors causing the spread of infection analyzed. Data were collected through a two-year survey over the whole regional area, involving 419 farms, 16,903 sheep and 9369 goats. The epidemiological results showed a true seroprevalence of 66.2% for flocks and of 9.7% at the animal level. Analysis of the risk factors showed that the spread of infection occurs via several concomitant biological, managerial, and farmer-related factors. The survey highlighted the need for urgent and suitable control plans providing guidelines to help Apulian farmers and their veterinarians contain and eliminate the disease, prevent biological risks for animal and humans as well as negative economic effects on the regional livestock sector
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
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