1,720,991 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
Oligometastatic Cancer in Upper GI : A Renaissance for Surgery ?
No full textOligometastatic upper gastrointestinal (UGI) cancers represent a biologically distinct state in which aggressive local therapies can lead to prolonged survival or even, in selected cases, durable remission. This concept has received increasing attention as growing evidence supports the integration of surgery or other local approaches alongside systemic treatment in patients with a limited metastatic burden.
In oesophageal cancer, clinical investigations have primarily focused on metachronous recurrences. Retrospective studies and case series suggest a survival benefit in patients with a long disease-free interval, a favorable response to systemic therapy, and the possibility of achieving complete tumor resection with low operative risk. Within this context, pulmonary and cervical lymph node oligometastases have emerged as ideal candidates for local treatment, given their resectability and the relatively limited morbidity associated with surgery in these locations.
In gastric cancer, most available studies, both retrospective and prospective, suggest that surgery may be a valuable therapeutic option in selected patients with synchronous oligometastatic disease, where both primary and metastatic lesions are treated during the same procedure. However, the only randomised trial to date, FLOT5/RENAISSANCE, provides inconclusive results that do not allow for definitive recommendations.
While these findings do not yet support a full-scale surgical renaissance, they reinforce the legitimate and increasingly recognised role of surgery as part of a multimodal treatment approach for both gastric and oesophageal cancers. The integration of systemic and local therapies, guided by multidisciplinary evaluation and tumor biology, holds the promise of extending therapeutic objectives beyond palliation toward sustained disease control in carefully selected patients.</p
Nouveaux standards dans le traitement du cancer de l'estomac
No full textLe cancer de l’estomac est une pathologie dont la prise en charge est multidisciplinaire avec de nombreux standards bien établis. Malgré cela, la survie à long terme des patients atteint par cette pathologie reste décevante. De nouvelles options thérapeutiques sont donc nécessaires pour améliorer cette situation.
Objectif
La présente thèse se focalise sur deux de ces options thérapeutiques :
1. La première est l’approche minimalement invasive de la chirurgie.
2. La deuxième est le traitement de la maladie métastatique.
Méthodologie
Dans le cas de l’approche minimalement invasive de la chirurgie, il s’agit d’une méta-analyse portant sur les études comparant la chirurgie ouverte à la chirurgie laparoscopique pour les cancers de l’estomac. Afin d’avoir des résultats applicables à la population Européenne, nous n’avons sélectionné que les études Européennes. Notre méta-analyse s’est concentrée sur des études retrouvées sur Pubmed et Embase en utilisant les mots-clefs ‘Gastric cancer’ AND ‘laparoscopy’. Nous avons retrouvé 14 études, une randomisée et 13 études de cohorte.
Concernant le traitement de la maladie métastatique, il s’agissait de récolter les connaissances actuelles sur la maladie oligométastatique dans le cancer de l’estomac. Nous avons donc recherché dans les bases de données Pubmed et Embase les mots clefs ‘Gastric cancer’ AND ‘oligometastasis’ et nous avons résumé l’état des connaissances actuelles dans notre revue de la littérature.
Conclusions
L’approche minimalement invasive de la chirurgie permettrait de diminuer le stress opératoire et augmenter la proportion de patients capables de bénéficier d’une chimiothérapie post-opératoire. Nous n’avons pas constaté de différence en termes de qualité chirurgicale avec un même nombre de ganglions réséqués et un taux de marge de résection saine équivalent quel que soit l’approche. La mortalité à court et long terme était également similaire. La chirurgie laparoscopique semble être sûre et constitue donc une alternative acceptable à la chirurgie ouverte.
Le traitement de la maladie métastatique était autrefois catégorisé comme une maladie incurable. Avec l’évolution des traitements de plus en plus efficace, un contrôle voire une régression de la maladie métastatique est possible. Dans ces cas, les patients peuvent être éligibles pour une chirurgie à but curatif. Un sous-groupe de patient avec une maladie métastatique limité peut bénéficier d’un traitement intensif. Des études supplémentaires sont nécessaires afin d’identifier ces patients spécifiques et de pouvoir les inclure dans des protocoles de traitement différents que ceux actuels. Les standards du traitement du cancer de l’estomac sont en pleine évolution avec le changement d’anciens dogmes devenu obsolètes. Beaucoup d’autres molécules avec des pistes d’action différentes de celles de la chimiothérapie sont en cours d’étude et pourront également apporter une amélioration de la prise en charge de cette pathologie au pronostic sombre.</p
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
- …
