1,720,990 research outputs found
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
P17 | Presenza di escherichia coli stec nei prodotti di origine animale: analisi delle notifiche irasff dal 2020 al 2025
No full textScopo. Gli Escherichia coli STEC si riscontrano prevalentemente nell’intestino dei ruminanti domestici. L’uomo può infettarsi per via del contatto con animali, ambiente o persone infette, oppure tramite ingestione di acqua ed alimenti contaminati. La tossinfezione determina un quadro di enterite emorragica e, in soggetti sensibili, ovvero bambini, anziani e immunocompromessi, di sindrome emolitico uremica. Allo scopo di individuare e caratterizzare le principali fonti alimentari di esposizione a E. coli STEC per i consumatori, è stata condotta un’analisi delle notifiche disponibili su iRASFF. Metodi. Per ciascuna delle notifiche pubblicate dal 01/01/2020 al 30/04/2025, sono stati analizzati i seguenti aspetti: matrice alimentare, tipologia di prodotto, specie animale di appartenenza, eventuali esiti della sierotipizzazione. È stato quindi analizzato il quadro normativo in materia di informazioni fornite al consumatore tramite l’etichetta. Risultati. I prodotti carnei sono stati suddivisi in base alla specie di appartenenza: bovino (118), ovino (22), capriolo (7), cervo (3), cinghiale (2), suino (2), cavallo (1), pollo (1). Sette prodotti erano riferibili a più di una specie: bovino e ovino (2), cervo e capriolo (1), cervo e suino (2), cinghiale e suino (2). Questi appartenevano alle seguenti categorie: carcasse (7), carni fresche (109), carni macinate (14), preparazioni di carni (24), prodotti a base di carne (10). Le specie i cui prodotti sono stati maggiormente sottoposti a sierotipizzazione sono il bovino e l’ovino. I sierotipi più frequentemente individuati dai 39 prodotti contenenti carni bovine sono stati: O26 (11 prodotti), O103 (10 prodotti), O157 (9 prodotti), O145 (6 prodotti), O91 (4 prodotti), O45 (4 prodotti), O111 (4 prodotti), O104 (3 prodotti). I sierotipi riscontrati nei 4 prodotti a base di carni ovine sono stati O91 (2 prodotti), O12, O28, O186, O104 (1 prodotto per sierotipo). I 69 prodotti della categoria “Latte e prodotti lattiero-caseari” erano fabbricati con latte di: bovino (41), bovino e ovino (2), ovino (3), capra (24). Sessantasette erano prodotti a latte crudo (per 2 prodotti il trattamento non era specificato) ed appartenevano principalmente alle seguenti categorie: formaggi a pasta molle e crosta fiorita (22), formaggi a pasta molle (16), formaggi semicotti a pasta pressata (12), formaggi a pasta molle e crosta lavata (6), formaggi freschi a coagulazione acida (6). L’analisi di 31 dei 69 prodotti ha portato al riscontro dei seguenti sierotipi: O26 (14), O103 (10), O157 (5), O145 (4). La normativa europea non prevede un’etichettatura specifica per tutelare le categorie sensibili di consumatori dal rischio associato al consumo di alimenti contaminati da E. coli STEC. Conclusioni. Sebbene i consumatori siano al corrente dei rischi associati al consumo di carne cruda o poco cotta, le informazioni sui rischi associati al consumo di prodotti lattiero-caseari a latte crudo sembrano essere insufficienti. Da questo quadro emerge la necessità di implementare strategie di comunicazione del rischio dedicate
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
P11 | Listeria monocytogenes in bulk milk from sheep farms in Tuscany and upper Lazio: what's the situation?
No full textPurpose. Listeria monocytogenes is a ubiquitous pathogenic bacterium found in the environment and food processing facilities. It can be present in various foods, with ready-to-eat products being of particular importance in relation to public health. It can be present in raw milk and cheeses, especially those made with raw milk and short to medium aging. It is the causative agent of listeriosis, a serious disease with a high mortality rate, primarily associated with the consumption of contaminated food. The study focused on the research, quantification, and characterization (serotyping and antibiotic sensitivity) of Listeria monocytogenes in raw sheep milk samples delivered by Tuscan and Viterbo farms to a Tuscan dairy. Methods. Between February and April 2024, 42 bulk raw milk samples from the same number of farms were analyzed based on ISO standards 11920-1:2017 and ISO 11920-2:2017 for the qualitative and quantitative determination of L. monocytogenes and L. ivanovii. Subsequently, the isolated microorganisms were subjected to phenotypic identification, again according to ISO 11920-1:2017, and then to a subsequent multiplex PCR in combination with phenotypic serotyping to identify the serotype. Finally, the sensitivity spectrum to 10 antibiotics of therapeutic interest was evaluated using the agar diffusion method according to Kirby Bauer. The search and quantification of L. monocytogenes and L. ivanovii were repeated for some of the positive samples over a maximum period of one year. Results. Out of 42 samples analyzed, 10 were positive for Listeria (23.8%); L. monocytogenes was isolated from 5 of them, and L. ivanovii, a pathogenic species for sheep and, rarely, for humans, with loads up to 650 CFU/ml, was isolated from 5. All L. monocytogenes isolates were serotype 1/2a, the most frequently found in food isolates and often associated with human clinical cases. All L. monocytogenes isolates were sensitive to β-lactams and gentamicin, the active ingredients of first-choice therapy, but showed resistance to meropenem, erythromycin, and sulfamethoxazole/trimethoprim. L. ivanovii was found to be sensitive to all antibiotics. Regarding persistence over time, it was possible to follow the evolution of Listeria contamination for approximately one year after the first sampling, finding its persistence in 4 farms for L. monocytogenes and in 1 for L. ivanovii. In one case, there was an increase in L. monocytogenes from 120 to 1000 CFU/ml over time, one year after the initial control. Conclusions. The study provides useful data for risk assessment in the case of raw milk production where milk from a single farm is processed, meaning there is no heat treatment of the milk and no dilution effect due to the use of milk from many farms in the dairy. The presence of the pathogen even at levels above 100 CFU/ml in bulk milk and its sporadic persistence in the herd at increasing levels over a one-year period highlights the need for constant monitoring, also considering the difficulty in detecting L. monocytogenes mastitis in animals
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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