1,721,012 research outputs found
Rappresentazione materna e paterna in gravidanza in un campione di coppie sottoposte a procreazione medicalmente assistita
No full textPushing the limits in order to avoid pneumonectomy
Full text linkWe have read with great interest the letter from Dr. Perentes and colleagues (1) with his comments about our recent paper (2). Dr. Perentes agrees with our results affirming that for the treatment of centrally located lung cancer sleeve lobectomy should be preferred over pneumonectomy even after induction treatment. Our paper included patients undergoing Y sleeve lobectomy after neoadjuvant chemotherapy. Other experiences on sleeve lobectomy after induction treatment, reporting good results have been published (3-5). In their letter, the authors suggest that video-assisted thoracoscopic surgery (VATS) approach should be considered a viable option also when complex reconstructive operation like lower sleeve lobectomy are to be performed. This is an interesting point of view and published experiences on Y-sleeve lobectomy performed by VATS has been reported (4). We all have seen case videos and pictures of VATS sleeve; often we have not seen any picture or data on long-term results. Important technical issues that pertain difficult bronchial reconstructions can be addressed by a careful technique. In this setting, open surgery allows a more precise placement of the stiches in order to correct even large discrepancy of size between the bronchial stamps, to preserve the segmental bronchi division and to avoid the torsion of the bronchial axis. These are crucial technicalities when performing in particular lower sleeve lobectomy. Novel techniques have been proposed, in particular, for reconstruction of the pulmonary artery (in our opinion, tangential pulmonary artery repair should not be considered a real vascular reconstruction) (4,6). Therefore, pulmonary artery reconstruction (end-to end, patch or conduit) is not an issue anymore. The alternative among bronchial and/or vascular reconstruction, pneumonectomy, or irresectability is always an issue. If it has been demonstrated that easy and straightforward reconstructions can be made by VATS or robotic-assisted thoracoscopic surgery (RATS), this certainly does not apply to the majority of circumstances. Our paper maybe is not the first example of a contribution towards pushing the limits of what surgeon can achieve with sleeve lobectomy as Dr. Perentes and colleagues wrote; but our and other experiences suggest that every technical limit, when oncologically feasible, should be exceed in order to avoid pneumonectomy
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
Procreazione medicalmente assistita e rappresentazioni materne in gravidanza
No full textObiettivo. Analizzare le rappresentazioni materne in un campione di donne in gravidanza tramite fecondazione assistita. Nello specifico si intende analizzare: 1) il contenuto dell’esperienza della gravidanza e dell’essere madre e 2) lo stile delle rappresentazioni materne relative a sé e al bambino. Metodologia. Campione: 20 donne italiane di età compresa tra i 28 e i 42 anni (età media 35; d.s. 4) in attesa del primo figlio. Strumento: Intervista per le Rappresentazioni Materne in Gravidanza (Ammaniti et al., 1995). Risultati. Il tema dell’infertilità emerge con forza dalle interviste; il modo in cui è avvenuta la fecondazione influenza l’esperienza della gravidanza che viene vissuta in maniera più concreta e meno affettiva. Inoltre, soprattutto se la gravidanza è stata a forte rischio medico, le donne hanno maggiore difficoltà a lasciarsi andare alla gravidanza e tendono ad usare meccanismi di difesa volti a mantenere il controllo su di sé
Critical tracheal stenosis caused by mediastinal lipomatosis: Long-term efficacy of airway stenting.
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