1,721,021 research outputs found
Bevacizumab intravitreale in monoterapia per macroaneurismi retinici sintomatici. Case report.
No full textLong term survival of mature autotransplanted teeth: A retrospective single center analysis
Full text linkObjective: The replacement of an irremediably compromised tooth requires an implant rehabilitation or a traditional fixed partial denture. In well-selected cases, a further therapeutic possibility is represented by tooth autotransplantation. Although dental transplants are poorly understood and practiced, the international literature agrees that it is considered the first choice when applicable. The advantages of this technique are numerous: use of an autologous element, maintenance of tissue trophism, aesthetic and functional restoration, costs reduction. Although autotransplantation is often performed with immature teeth, even mature teeth with fully formed apex can be used as donors. The aim of the present work was to analyze consecutive cases of completely formed donor teeth autotransplantations performed from 2005 to 2011 in 21 patients for evaluating the survival and success rate. Materials and methods: The medical records of patients who underwent transplantation in a specialized center in Rimini (Italy) from 2005 to 2011 were checked. Only transplants of mature donor molars were considered. Patients were called up to evaluate the survival rate and success rate. Results: The mean age at the time of the surgery was 33,6 ± 7,4; mean follow up was 11,9 years ±1,9. Success rate at the time of latest recall visit was 80 % and survival 95 % of the analyzed cases. Conclusions: The survival and success rate are in complete agreement with the most recent literature and confirm that the technique of autotransplantation is reliable when indications and protocols are rigidly followed, also using mature teeth as donors
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
Increased flash flooding and climate change in the Genoa Metropolitan Area (Italy)
No full textThe Genoa Metropolitan Area (GMA) is historically affected by flash floods for two main reasons: the meteorological conditions due to the Genoa Low and the city’s geomorphologic arrangement: a narrow coast belt bounded by mountains. In the last years in GMA there is also an increase in flash floods due to man-made landforms and changes in rainfall regime. In 2014 several floods took place: in some areas of the hinterland the cumulate year rainfall has exceeded 4000 mm, while 2000 mm fell on the coast. The research analyses the thermo-pluviometric statistics collected over more than 100 years, registered by Genoa University (since 1833) and Chiavari (since 1877) stations, which represent the central and the eastern zone of the GMA. An analysis was based on mean annual air temperatures, rainfall, rainy days and rainfall rate, which means an annual rainfall and rainy days ratio. The air temperatures show a positive trend, statistically significant, rising from an average of 15 °C in the 19th Century to a current average of 16° C. The annual rainfall does not show any trend, remaining at an average of 1270 mm for Genoa and 1180 mm for Chiavari [5]. The number of rainy days shows a negative trend, statistically significant, from more than 110 days in the 19th Century in Genoa (90 in Chiavari) to 90 nowadays (80 days in Chiavari). As a consequence, the rate of daily rainfall shows a positive trend: we can say that rainfall is more intense. The scenario above is confirmed by the analysis of maximum precipitation recorded by the two pluviographs for 1,3,6,12 and 24 hours in 1945-2014 period; although there is no statistical relevance, all the analyzed values indicate an increasement over time, showing the intensification of flood events in recent decades
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
- …
