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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
LE INFEZIONI DELLE VIE URINARIE NEL PAZIENTE CON TRAPIANTO DI RENE
Get PDFIl trapianto di rene rappresenta il gold standard terapeutico per i pazienti affetti da insufficienza renale cronica in stadio finale. Le infezioni delle vie urinarie (IVU) sono la patologia infettiva più frequentemente osservata nei pazienti sottoposti a trapianto renale e, nonostante il miglioramento delle tecniche chirurgiche e della profilassi antibiotica, costituiscono ancora oggi un problema clinico di grande rilevanza.
Nel presente studio sono stati esaminate le cartelle cliniche di 800 pazienti sottoposti a trapianto renale e seguiti in follow-up presso il D.H. di Nefrologia e Trapianti di Rene dell’AOU “Federico II” di Napoli.
Degli 800 pazienti esaminati i Maschi erano n. 508 (63,5%) e le Femmine n. 292 (36,5%).
Sugli 800 pazienti sono state effettuate un totale di 35.440 osservazioni e sono state riscontrate n.1.863 (5,25%) osservazioni con IVU. Queste osservazioni corrispondevano a 403 pazienti (50%).
Dei 403 pazienti n.132 (32,7%) hanno sviluppato 1 episodio di IVU; n.66 (16,4%) hanno presentato 2 episodi di IVU; n.205 pazienti (51%) hanno manifestato infezioni recidivanti (definite come 3 o più IVU), e tali episodi hanno interessato n.90 maschi (43,9%) e n.115 femmine (56,1%).
I pazienti diabetici erano 184 (23,1%) sul numero totale di 800 pazienti in follow-up. Nel gruppo con IVU recidivanti vi erano 60 pazienti (29,3%).
Durante il primo anno dal trapianto di rene sono state fatte 9.200 osservazioni in tutti i pazienti e in 634 osservazioni (6,9%) era presente una IVU. Queste osservazioni con IVU corrispondevano a 209 pazienti pari al 51,9% del totale di tutti i 403 pazienti con IVU.
In tutte le osservazioni con IVU i patogeni coinvolti sono stati Escherichia Coli (53.8%), Enterobacteriacee (12.5%), Klebsiella spp. (11.6%), Pseudomonas spp. (4.6%), Candida spp. (4%), Proteus spp. (2.9%).
A 5 anni dal trapianto la funzione renale tra i pazienti con IVU recidivanti (gruppo A) e quella dei pazienti senza IVU o con IVU non recidivanti (gruppo B) era identica (Gruppo A: creatininemia 1,44+0,56; Gruppo B 1,44+0,69 mg/dl).
La prevalenza delle IVU nel campione esaminato si attesta su valori compatibili con quanto descritto in letteratura, confermando che tali infezioni continuano a rappresentare una complicanza molto frequente del trapianto di rene. La loro frequenza è particolarmente rilevante nel primo anno post-trapianto a causa di fattori come la maggiore intensità della terapia immunosoppressiva ed il posizionamento dello stent vescico-ureterale al momento del trapianto con sua rimozione a 2/3 mesi dallo stesso.
Escherichia coli rimane il germe maggiormente isolato nelle urinocolture. Riguardo l’influenza delle IVU precoci o tardive sulla sopravvivenza del graft, nella nostra analisi non si è evidenziata una differenza significativa tra la funzione renale tra il gruppo di pazienti IVU e il gruppo non-IVU
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
Follow-up COVID-19 and lung ultrasound are fundamental to prove full recovery in children with interstitial lung disease requiring oxygen: a case report
No full text
Background:
Children with mild or asymptomatic COVID-19 represent the majority of paediatric cases. Hospitalisation and critical care are required only in a small proportion of SARS-CoV-2 positive children who present severe symptoms, like interstitial lung disease. A quarter of children experience persistent symptoms some months later after being hospitalised, and they need to be properly followed up.
Case presentation:
The authors describe a case report of long-COVID in a 5 years old child, who was previously hospitalized for a severe case of COVID-19 (an interstitial lung disease requiring oxygen), followed up in 3 months in our Pediatric Department.
Results:
After 3 months post-hospitalisation, despite his clinic history, the clinical examination was normal, during the six-minute walking test he did not desaturate, the spirometry was in the norm and the lung ultrasound did not show any pathological findings.
Conclusion:
We reported a case of a child previously hospitalised for interstitial lung disease with long-COVID, who has been followed up 3 months after the hospitalisation by our Department of Pediatrics of the University ‘Luigi Vanvitelli’. Based on our experience, even in children who have experienced a severe form of COVID-19 disease and who continue to exhibit symptoms, a proper follow-up can demonstrate a full recovery in a few months.
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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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