1,720,996 research outputs found
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
Etilglucuronide (EtG) nella matrice pilifera post-mortem come marcatore di rischio nell’incidentalità stradale, ferroviaria e negli infortuni sul lavoro: studio pilota = Ethyl glucuronide (EtG) in the post-mortem hair matrix as a risk marker in road, railway, and work accidents: a pilot study
No full textLa correlazione tra abuso cronico di alcol e rischio di incidenti stradali, ferroviari e occupazionali è un tema scarsamente esplorato nella letteratura scientifica. Tuttavia, la disponibilità di biomarcatori affidabili che consentano di rilevare un’associazione tra consumo cronico e aumento dell’incidentalità riveste un ruolo cruciale in ambito medico-legale e preventivo. La determinazione quantitativa nelle strutture pilifere dell’etilglucuronide (EtG), metabolita diretto dell’etanolo, rappresenta un indicatore altamente sensibile di consumo cronico di alcol (≥60 g/die). Rispetto alla CDT (transferrina carboidrato carente), che ha dimostrato in alcuni studi1,2 una buona correlazione con alcolemie positive al momento del sinistro stradale, l’EtG mostra maggiore sensibilità diagnostica e un intervallo temporale più ampio (3–6 mesi contro 2–3 settimane), risultando pertanto preferibile nella valutazione dell’uso cronico di alcol. Questo studio pilota ha indagato la correlazione tra i livelli di EtG in strutture pilifere disponibili (capelli, peli toracici o ascellari) e l’alcolemia al momento dell’evento traumatico in un campione di 27 soggetti deceduti a seguito di incidenti stradali (N=18), ferroviari (N=5) o sul lavoro (N=4). Per evitare falsi positivi da contaminazioni peri- o post-mortem, è stata sviluppata una procedura pre-analitica di decontaminazione della matrice pilifera articolata in quattro fasi. La presenza di EtG (>LOQ=6,7 pg/mg) è stata riscontrata in 14 casi (52%), di cui 7 con concentrazioni comprese tra 7 e 30 pg/mg, e 7 con valori superiori a 30 pg/mg, soglia indicativa di consumo cronico. In un solo caso, l’EtG è stato rilevato nei capelli (0–3 cm) ma non nei peli toracici, suggerendo una contaminazione peri- o post-mortem. Tale ipotesi è avvalorata dalla presenza di EtG nel primo lavaggio di decontaminazione dei capelli e nel campione ematico. L’alcolemia è risultata positiva (>0,17 g/L) nel 59% dei casi totali e in 11 dei 14 soggetti positivi all’EtG, suggerendo una possibile correlazione tra consumo cronico e stato di ebbrezza in acuto. I risultati preliminari supportano l’utilizzo dell’EtG come biomarcatore per individuare soggetti a rischio aumentato di mortalità traumatica legata all’assunzione cronica di alcol
Pilot Application of SEM/EDX Analysis on Suspected Cigarette Burns in a Forensic Autopsy Case of Child Abuse
Full text linkCigarette burn lesions present forensic scenarios that are often difficult to investigate, both from a morphological diagnostic point of view and with regard to the mode of infliction, especially if the victim is unable to speak or has died. Although there may be the suspicion for a lesion to be produced by a lit cigarette, to date one can only rely on the morphological aspects that characterize it, and there is a lack of tools to reach the most evidence-based diagnosis possible. This limitation arose when managing a forensic autopsy case of possible child abuse that resulted in the death of the child, characterized by the presence of 3 suspicious cigarette burn lesions. We therefore decided to perform scanning electron microscopy/energy-dispersive x-ray (SEM/EDX) spectrometry analysis on these lesions and on the cigarette butt found at the crime scene. At the same time, SEM/EDX was applied to the analysis of an unlit cigarette in its entirety (obtained from the same source package as the cigarette butt), a positive control skin sample with an iatrogenic cigarette burn injury, and a negative control skin sample. Among the various compounds highlighted on compositional analysis, only sulfuric anhydride (SO 3 ) and phosphoric anhydride (P 2 O 5 ) showed a highly significant distribution pattern by being found in the autopsy samples, the cigarette butt, the tobacco of the unlit cigarette, and the positive skin control. Considering this, cigarette burns appear to follow Locard's principle as well, and similarly to other lesions, SEM/EDX allowed the diagnosis of cigarette burn lesions, already suspected morphologically, to be corroborated. Therefore, SEM/EDX is confirmed as a helpful tool in forensic pathology investigations
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
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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