1,720,956 research outputs found
Fattori di rischio perinatali, socio-economici ed infettivi per la malattia celiachia: uno studio di coorte di nascita attraverso record-linkage di flussi informativi correnti.
No full text
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
Association of Maternal Education, Early Infections, and Antibiotic Use With Celiac Disease: A Population-Based Birth Cohort Study in Northeastern Italy.
No full textWe conducted a population-based birth cohort study of approximately 203,000 babies born in northeastern Italy
(1989–2012) to investigate perinatal variables, early infections leading to hospital admission, and antibiotic use in
the first 12 months of life as possible risk factors for celiac disease (CD). Incident CD cases were identified from
pathology reports, hospital discharge records, and exemptions from prescription charges for clinical tests. Multivariate
Poisson regression models were fitted to estimate incidence rate ratios (IRRs). A total of 1,227 children had CD;
CD was histopathologically confirmed in 866 (71%). Female sex, maternal age, and high maternal educational level
were found to be significantly associated with CD. Gastrointestinal infections were strongly associated with a subsequent
diagnosis of CD (IRR = 2.04, 95% confidence interval (CI): 1.30, 3.22). Antibiotic use was significantly associated
with CD onset (IRR = 1.24, 95% CI: 1.07, 1.43), with a dose-response relationship for number of courses
(P-trend < 0.01). Cephalosporin use strongly increased the risk of CD (IRR = 1.42, 95% CI: 1.18, 1.73). Use of antibiotics
(supported by the dose-response relationship) and gastrointestinal infections in the first year of life may
facilitate the early onset of CD by altering intestinal microflora and the gut mucosal barrier. Perinatal factors, including
cesarean section, had little influence on the risk of childhood CD
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
FATTORI DI RISCHIO PERINATALI, SOCIO-ECONOMICI ED INFETTIVI PER LA MALATTIA CELIACHIA: UNO STUDIO DI COORTE DI NASCITA ATTRAVERSO RECORD-LINKAGE DI FLUSSI INFORMATIVI CORRENTI.
No full textIntroduzione La malattia celiaca (MC) è un'enteropatia autoimmune permanente scatenata dall'ingestione della frazione proteica del glutine del glutine. La MC è diagnosticata attraverso il riscontro istologico delle lesioni della mucosa duodenale (atrofia dei villi). Mentre fattori genetici sono condizione necessaria per lo sviluppo della MC e l'assunzione di glutine nei primi mesi di vita potrebbe in parte spiegare differenze nella sua occorrenza, altri fattori di rischio sono stati indagati con risultati spesso inconsistenti (Tack 2010). Obiettivi Identificare fattori di rischio perinatali, socio-demografici ed infettivi per la MC ed identificare sottogruppi a più alto rischio attraverso uno studio di coorte di nuovi nati seguiti per 23 anni di follow-up. Metodi E' stata costituita una coorte di nati dal 1989 al 2012 nella Regione Friuli Venezia Giulia attraverso certificati di assistenza al parto (CEDAP) che contengono informazioni socio-economiche, relative al parto ed al neonato, e successivamente linkati con id anonimo a diverse fonti amministrative correnti. I casi incidenti di MC sono stati identificati attraverso referti patologici di atrofia dei villi , ricoveri in tutte le diagnosi (ICD IX 5790) ed ET per MC (I0060). Sono stati identificati ricoveri per malattie infettive e consumo di farmaci antibiotici (ATC: J01*) nel primo anno di vita. Sono stati inclusi neonati con almeno 1 anno di follow-up. Sono stati calcolati incident rate ratio (IRR) per ciascun fattore di rischio utilizzando modelli multivariati di Poisson per identificare possibili fattori di rischio aggiustati per genere ed anno di nascita del neonato. Risultati Sono stati identificati 1,227 soggetti con almeno una diagnosi di MC (di cui 866 con referto istologico) e 202,330 senza MC (tot 29,369,750 mesi persona). Dalle analisi sono emersi alcuni fattori associati all'insorgenza di MC, in particolare il genere femminile: IRR 1.69 (1.51-1.89); il basso peso alla nascita: IRR 1.23 (0.98-1.54); il livello di istruzione superiore (vs elementare/media) della madre: IRR 1.24 (1.10-1.40); ed universitario del padre: IRR 1.36 (1.14-1.61). Al contrario, altri fattori di rischio perinatali come presenza parità, parti gemellari, parto cesareo, punteggio Apgar non sono risultati associati alla MC. L'aver avuto almeno un ricovero per malattie infettive è risultato fattore di rischio per successiva diagnosi di MC: IRR 1.39 (1.01-1.92), come l'assunzione di farmaci antibiotici: IRR: 1.24 (1.07-1.43), per la quale è stato evidenziato un effetto dose risposta (p-trend<0.01). I risultati rimangono simili restringendo i casi di MC a quelli con referto istologico. Conclusione Lo studio ha identificato alcuni fattori di rischio ambientali perinatali o dei primi mesi di vita per insorgenza di MC. In particolare il consumo di antibiotici, supportato da un effetto dose-risposta, e precedenti gastroenteriti batteriche possono giocare un ruolo nello sviluppo precoce di MC attraverso alterazioni della mucosa intestinale. L'effetto †̃protettivo' del livello socio-economico, possibilmente dovuto ad altri fattori di rischio legati allo sviluppo della malattia deve essere ulteriormente investigato
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
- …
