1,721,064 research outputs found
Cellule staminali da elementi dentali decidui e terzi molari (SHED e DPSCs), biomateriali e sostituti ossei
No full textImportance of Fetal MRI in Evaluation of Craniofacial Deformities
No full textAim: This retrospective study aims at demonstrating the importance of a correct and detailed early diagnosis of craniomaxillofacial malformations affecting the fetus, which would (1) allow improvement in ultrasonography (US) diagnosis, (2) help in planning the therapeutic-surgical procedure, and (3) improve handling of the pathology by the families. Materials and Methods: Between 2008 and 2011, a sample of 28 fetuses was selected, all with an ultrasound diagnosis of cleft lip (cheiloschisis-CL) and cleft lip and palate (palatoschisis-CLP) and craniofacial malformation, whose mothers had all underwent ultrasound diagnostic examinations and nuclear magnetic resonance (MRI). All cases were submitted to US examination between the 12th and 19th week of pregnancy, US-3D examination performed by a specialist radiologist between the 19th and 22nd week, and MRI examination between the 23rd and 33rd week of pregnancy. Results: The MRI confirmed the ultrasound diagnosis of 16/28 cases and added information in 11/28 cases, and in 1 (1/28) case, the MRI denied previous CL-CLP ultrasound diagnosis. Moreover, in this study MRI improved the analysis of the entire morphology of the fetuses in cases when syndromic involvement with the involvement of other organs needs to be determined. Conclusions: The MRI method in fetal patients allows to obtain more details regarding the CL-CLP studied, allowing the medical-surgical team to plan, before the birth, the type of postnatal assessment and surgery to be performed, thus minimizing the impact on neonatal health and improving quality of life of both the patient and his family
Scheduling assembly tasks with caterpillar precedence constraints on dedicated machines
No full textIn this work, we address the problem of scheduling a set of n non-preemptive tasks on m dedicated machines in order to minimise the makespan. For each task deterministic processing times and a specific processing machine are given, moreover a set of precedence constraints among the tasks are known. We present a heuristic and some lower bounds on the minimum makespan for a relevant case in manufacturing applications, namely when the precedence constraints form a caterpillar graph. A caterpillar is a directed tree consisting of a single directed path and leaf nodes each of which is incident to the directed path by exactly one incoming arc. A number of computational experiments are also performed in order to test the performance of the proposed solution algorithm
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
Surgical Management of Compound Odontoma Associated with Unerupted Tooth
Full text linkOdontomas represent the most common type of odontogenic benign jaws tumors among patients younger than 20 years of age. These tumors are composed of enamel, dentine, cementum, and pulp tissue. According to the World Health Organization classification, two distinct types of odontomas are acknowledged: complex and compound odontoma. In complex odontomas, all dental tissues are formed, but appeared without an organized structure. In compound odontomas, all dental tissues are arranged in numerous tooth-like structures known as denticles. Compound odontomas are often associated with impacted adjacent permanent teeth and their surgical removal represents the best therapeutic option. A case of a 20-year-old male patient with a compound odontoma-associated of impacted maxillary canine is presented. A minimally invasive surgical technique is adopted to remove the least amount of bone tissue as far as possible
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
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