1,720,982 research outputs found
Chirurgia del distacco regmatogeno di retina: cerchiaggio con benderella di silicone con chiusura con filo riassorbibile.
No full textIl cerchiaggio è una delle tecniche elettive nella chirurgia del distacco regmatogeno di retina, I materiali che possono essere utilizzati si differenziano per la larghezza della indentazione e per essere o no assorbibili. La conseguenza è un effetto dell’ indentazione permanente o temporaneo.
Lo scopo del presente lavoro è stato quello di valutare la validità dell’ utilizzo di una benderella di silicone la cui chiusura è stata effettuata con filo riassorbibile Vicryl 6/0.
Sono stati osservati 8 occhi operati di distacco di retina secondo questa tecnica valutando le modificazioni della refrazione e della lunghezza assiale.
I risultati ottenuti dimostrano che 60 giorni dopo l’ intervento la refrazione e la lunghezza assiale degli occhi operati presentano cambiamenti, rispetto ai valori preoperatori, minori in confronto agli interventi in cui la chiusura del cerchiaggio viene effettuata con filo non assorbibileEncircling scleral buckling of the eye is one of the elective surgical methods in retinal rhegmatogenous detachment;
the elements available are characterized by the breadth of indentation and by whether or not
they are absorbable. Consequently, they have a permanent or temporary effect of indentation. It is the purpose
of this study to estimate the validity of a silicone band that has been closed with Vicryl 6/0 absorbable
thread.
A total of 8 eyes were observed, which had undergone retinal rhegmatogenous detachment using this technique,
with the purpose of estimating the changes in refraction and axial length. The results obtained show
that 60 days after surgery, refraction and axial length of the eyes changes, as compared to preoperative values,
and they are less if compared to surgery in which closing of the scleral bucklingis carried out with not
absorbable thread
Chirurgia del distacco regmatogeno di retina: cerchiaggio con benderella in silicone con chiusura in filo assorbibile.
No full textIl cerchiaggio è una delle tecniche elettive nella chirurgia del distacco regmatogeno di retina, i materiali che possono essere utilizzati si differenziano per la lunghezza dell' indentazione e per essere o no assorbibili. la conseguenza è un' effetto dell' indentazione permanente o temporaneo.
lo scopo del presente lavoro è stato quello di valutare la validità dell' utilizzo di una benderella di silicone la cui chiusura è stata effettuata con filo assorbibile Vicryl 6/0.
Sono stati osservati 8 occhi operati di distacco di retina secondo questa tecnica valutando le modificazioni della refrazione e della lunghezza assiale.
I risultati ottenuti dimostrano che 60 giorni dopo l' intervento la refrazione e la lunghezza assiale degli occhi operati presentano cambiamenti, rispetto ai valori preoperatori, minori in confronto agli interventi in cui la chiusura del cerchiaggio viene effettuata con filo non riassorbibile.Encircling scleral buckling of the eye has usually a permanent effect of indentation.The purpose of this study is to examine the validity of an encircling silicon band closed temporarily with an absorbable thread (Vicryl 6/0) in retinal detachment surgery.
A total of 8 eyes were observed, wich had undergone retinal rhegmatogenous detachment using this technique, with the purpose of estimating the changes in refraction and axial length. The results obtained show that 60 days after surgery, refraction and axial length of the eyes changes, as compared to preoperative values, and they are less if compared to surgery in wich closing of the sclera buckling is carried out with not adsorbable threa
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
A new Monodontidae (Cetacea, Delphinoidea) from the lower Pliocene of Italy supports a warm-water origin for narwhals and white whales
Full text linkA new taxon of monodontid cetacean, Casatia thermophila, gen. et sp. nov., is here described on the basis of a partial skull from lower Pliocene (5.1–4.5 Ma) marginal-marine deposits of Tuscany (central Italy). This new taxon belongs to Monodontidae based on the presence of a medial exposure of the maxillae anterior and lateral to the external bony nares; it mainly differs from all other named monodontids by the presence of a median depression of the premaxillae anterior to the premaxillary sac fossae and by a medial margin of the premaxillary-maxillary suture that does not parallel the anterolateral profile of the external bony nares. Our phylogenetic analysis, the first including all taxa of Monodontidae, recovers Casatia as a crown monodontid, more closely related to Delphinapterus than to Monodon and sister group of an unnamed taxon from the North Sea. The holotype of Casatia represents the first and only fossil monodontid from the Mediterranean Basin. Taking its place beside abundant fossils of strongly thermophilic marine vertebrates, such as the bull shark Carcharhinus leucas, the tiger shark Galeocerdo cuvier, and the extinct sirenian Metaxytherium subapenninum, Casatia thermophila represents the strongest evidence supporting the hypothesis that monodontids once thrived in low-latitude, warm-water habitats. On the basis of our phylogenetic reconstruction, early relatives of the extant monodontids might have adapted independently to the high-latitude, cold-water environments they currently master. The definitive disappearance of the Neogene thermophilic monodontids could be attributed to the cooling episode that accompanied the onset of long-term Northern Hemisphere glaciation around 3 Ma
Comparison of carbon stock and biological soil quality in organic and conventional agriculture within Ombrone Plain
No full textVariations 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
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