1,720,959 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
Campi elettromagnetici e suicidio: un protocollo di studio
No full textL’esposizione a campi elettromagnetici può provocare effetti sulla salute. In particolare alcuni studi hanno evidenziato una possibile correlazione tra la esposizione a campi elettromagnetici a frequenze estremamente basse generati dalle linee elettriche ad alta tensione ed alcune patologie quali leucemie infantili e tumori cerebrali. Altri studi hanno inoltre proposto la presenza di una associazione tra la residenza in prossimità di elettrodotti e l’occorrenza di sindromi depressive e suicidi.Abbiamo così steso un protocollo per la conduzione di uno studio di tipo caso-controllo da realizzare con l’ausilio di procedure di georeferenziazione GIS (Geographical Information System) nel territorio di Reggio Emilia. Tale studio si pone i seguenti obiettivi: costruire una mappa di patologia che mostri la distribuzione territoriale dei suicidi occorsi fra i residenti del comune di Reggio Emilia nel periodo 1989-2008; studiare la correlazione tra suicidi e l’esposizione a campi elettromagnetici generati dalle linee elettriche ad alta tensione; identificare eventuali aggregati spaziali di tale fenomeno. Saranno identificati tutti i casi di suicidio occorsi dal 1989 al 2008 nei residenti nel comune di Reggio Emilia. Per ciascuno di essi saranno estratti casualmente dalla popolazione residente due controlli dello stesso sesso ed anno di nascita. Di ogni soggetto in studio saranno ricercati la residenza al momento del suicidio, la professione ed il titolo di studio consultando i registri informatizzati e cartacei dell’anagrafe comunale. Con una simulazione modellistica calcoleremo il campo magnetico generato dalle linee elettriche ad alta tensione (>132kV) presenti sul territorio comunale ed identificheremo fasce di esposizione lungo gli elettrodotti caratterizzate da induzione magnetica con cutoff pari a 0.1, 0.2 e 0.4 microtesla (μT).In un progetto GIS inseriremo le localizzazioni delle abitazioni dei casi e dei rispettivi controlli (dopo avere attribuito ad ogni edificio le proprie coordinate cartografiche) e le aree espositive identificate lungo gli elettrodotti al fine di attribuire ad ogni soggetto il proprio status espositivo.Sarà così elaborata una ‘mappa di patologia’ che descriverà la distribuzione dei casi di suicidio nel territorio del comune di Reggio Emilia e che permetterà, con opportune analisi di cluster, di individuare la presenza di possibili aggregati spaziali. Inoltre, utilizzando modelli multivariati di regressione logistica condizionata e tenendo conto dei possibili fattori confondenti, sarà calcolato il rischio relativo di suicidio associato alla residenza nelle aree a crescente esposizione ai campi elettromagnetici generati da linee elettriche ad alta tensione
Sensibilità ed accuratezza diagnostica dei flussi informativi del Servizio Sanitario Nazionale nella rilevazione dell’incidenza delle patologie linfoproliferative in una popolazione italiana.
No full textWe examined the sensitivity and the accuracy of three health databases (hospital discharge data, death certificates and pathologic records) between 1997 and 2001 in an Italian community, to evaluate their accuracy for the diagnosis of lymphoid malignancies and their ability to detect newly diagnosed patients affected by these diseases. Hospital discharge data showed the best sensitivity among the examined databases, though they exhibited an unexpectedly high number of diagnostic errors, even when limiting the analysis to patients with repeated hospital admissions over time. Overall, the pathologic registry and the death certificate file showed a higher diagnostic accuracy, though their sensitivity was considerably lower than hospital discharge data
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
