1,720,994 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
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
Split liver network (SLN): un network collaborativo per ottimizzare l'allocazione di split liver attraverso Internet.
No full textPremessa - Il trapianto di fegato Split Liver (SLT) è un'opzione cruciale per massimizzare il pool di donatori. Le Organizzazioni di organ procurement allocano usualmente fegati interi a singoli centri, mentre non è disponibile un sistema per l'allocazione multicentrica di split graft. Nel 2003, il Ministero della Salute ha finanziato il progetto “Strategie Innovative per il Trapianto di Fegato” (SITF) con l'obiettivo principale di elaborare/condividere criteri per SLT su due riceventi adulti.
Metodi - Coordinato dal Dipartimento Trapianti di Genova, il gruppo di lavoro SITF, comprendente i principali Centri Trapianto nazionali, il Nord Italia Transplant (NITp) ed il Centro Nazionale Trapianti, ha definito criteri di inclusione di donatori e riceventi, individuando un rapporto minimo graft-to-recipient weight ratio (GRWR) di 1.2%. Attraverso la condivisione di donatori cadavere e pazienti in lista, è stata realizzata un'area protetta Internet (Split Liver Network, SLN). SLN restituisce in tempo reale gli accoppiamenti tra il donatore segnalato ed i pazienti del pool SLN, calcolati in base al GRWR, suggerendo le possibili allocazioni in seguito al riferimento del fegato intero al centro titolare.
Risultati - Nell'anno 2005 sono stati inseriti in SLN 47 donatori e 124 riceventi (9 centri), con la registrazione di 6 procedure SLT adulto/adulto. Una simulazione retrospettiva effettuata applicando i criteri SITF all'area NITp (9 centri, 613 pazienti, 32 donatori) ha dimostrato la possibilità di reperire riceventi per tutti i donatori, maggiormente condizionata dalla rarità del gruppo sanguigno rispetto al peso del donatore.
Commenti - SLN rappresenta un approccio innovativo per lo SLT, consentendo di condividere un unico pool macroregionale di donatori e riceventi, attraverso la collaborazione tra Centri Trapianto. Il modello di allocazione SLN, ricevente-orientato anziché centro-orientato, potrebbe aumentare la probabilità di matching, offrendo un trapianto tempestivo per riceventi di gruppo raro, di taglia piccola e con limitata possibilità di permanenza in lista di attesa
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
Split liver network (SLN): an experimental internet-based system to expand organ pool.
No full textBackground - Split Liver Transplantation (SLT) has become a crucial option to maximize the liver pool, while Organ Procurement Organisations (OPOs) usually allocate whole livers to single centers. In 2003, Italian Ministry of Health funded the ‘SITF’ project with the goal to establish sharing criteria for Split Liver Transplantation for two adults (SLT A/A), involving Italian transplantation centers, the North Italy Transplant OPO and the Italian National Transplant Center.
Methods - SITF group defined donor/recipient inclusion criteria, setting minimum graft/recipient weight ratio (GRWR) at 1.2%. Donors and recipients on waiting list were shared on an Internet secured Web-based application (Split Liver Network, SLN). SLN performs realtime matches between the registered donor and all patients on the bases of GRWR, displaying a size-based list of matched donor/patients, figuring hemiliver allocation once the whole organ is referred to owner Center.
Results - In the 2005 period, 47 donors and 124 patients were entered by nine centers, and six hemiliver allocations for three SLT A/A procedures were performed. By retrospective simulation of 32 donors and 613 recipients in the NITp area, matchable recipients were available for all donors, while blood group frequency seemed a determining factor, more than donor body weight.
Comments - SLN hemiliver allocation might increase matching possibilities, offering a timely transplant for recipients of rare group, small-size or in need of short wait. Our experience suggests that such an environment may be helpful to share a macroregional pool of liver recipients and to optimize SLT
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