1,720,962 research outputs found
USE OF ULTRASOUND REAL-TIME EXAMINATION AND COLOUR-DOPPLER TO EVALUATE INITIAL RESPONSE TO ROOT CANAL TREATMENT
No full textENDODONTIC TREATMENT AND HYPOTHESES ON AN UNUSUAL CASE OF DENS INVAGINATUS
No full textThis work describes a case of ‘‘dens invaginatus’’ and
analyzes the possible aspects of this malformation. An
unusual type of dens invaginatus was detected in
a young patient corresponding to the maxillary lateral
incisor and showing extensive periradicular radiolucency
and a vestibular fistula. The radiographic and tomographic
examination revealed two apices: one wide
open in the distal part of the root and the other normally
formed in the mesial. Nonsurgical endodontic treatment
was performed by using the ‘‘one-step apexification
technique,’’ filling both apexes with mineral trioxide
aggregate followed by composite resin. The follow-up
examination 6 months later showed the healing of the
radiolucent area and the healing of the sinus tract.
Hypotheses on which was the type of dens invaginatus
we had to deal with are formulated. (J Endod 2009;35:
417–42
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
Ponticulus posticus: clinical and CBCT analysis in a young Italian population
Full text linkAim To evaluate the prevalence, the morphological characteristics and any related symptoms of Ponticulus Posticus (PP) in young Italian patients by means of cone-beam computed tomography.Materials and methods A retrospective study was conducted on images derived from cone-beam CT scans of an Italian population in developmental age (mean age 12.61 +/- 2.69); medical history was also evaluated from medical records. The total prevalence and morphology of PP, the prevalence by gender and according to age groups were calculated. For the statistical analysis the chi(2) test was used.Results Total prevalence of PP was 28.24%, the prevalence by gender was 35.27% for males and 21.42% for females, with statistically significant differences. PP was bilateral in 74.33%, and monolateral in 25.67%. As regards symptoms, the cases with headache were 32.43%, tinnitus 6.08%, migraine 3.38%. Dividing by age, patients aged <= 11 years showed headache in 25% of cases, patients aged between 12 and 14 years in 54.17% of cases and patient aged between 15 and 17 years in 20.83%.Conclusions PP is not a rare anomaly in Italian young patients and should always be sought in the lateral cephalograms and CBCT, in patients whether or not symptomatic, irrespective of their age, for differential diagnosis and management of cranio-cervicofacial pain in developmental patients
Ponticulus posticus: Clinical and CBCT analysis in a young Italian population
No full textAim To evaluate the prevalence, the morphological characteristics and any related symptoms of Ponticulus Posticus (PP) in young Italian patients by means of cone-beam computed tomography. Materials and methods A retrospective study was conducted on images derived from cone-beam CT scans of an Italian population in developmental age (mean age 12.61 ± 2.69); medical history was also evaluated from medical records. The total prevalence and morphology of PP, the prevalence by gender and according to age groups were calculated. For the statistical analysis the χ2 test was used. Results Total prevalence of PP was 28.24%, the prevalence by gender was 35.27% for males and 21.42% for females, with statistically significant differences. PP was bilateral in 74.33%, and monolateral in 25.67%. As regards symptoms, the cases with headache were 32.43%, tinnitus 6.08%, migraine 3.38%. Dividing by age, patients aged ≤ 11 years showed headache in 25% of cases, patients aged between 12 and 14 years in 54.17% of cases and patient aged between 15 and 17 years in 20.83%. Conclusions PP is not a rare anomaly in Italian young patients and should always be sought in the lateral cephalograms and CBCT, in patients whether or not symptomatic, irrespective of their age, for differential diagnosis and management of cranio-cervicofacial pain in developmental patients
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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