1,721,292 research outputs found
Palermo Ro-Ro / C. Prati. - 27.05.2019 bis
No full textPalermo Ro-Ro / C. Prati. - 27.05.2019.
1 schizzo : china ed evidenziatore su carta
; 20,5 x 14 cm.
Schizzo di progetto dei nuovi terminal
cruise e Ro-Ro, nuovo porto di Palermo
per il “Concorso internazionale per il
terminal Cruise, il terminal Ro-ro e l’interfaccia con la città” - I° classificato. Donato dall’autore nel luglio 2020.
Segnatura: FDA 024.2
Architettura industriale prefabbricata e sostenibilità: dalla valutazione energetico ambientale alle strategie di riqualificazione
No full text
FTIR, Raman and SEM analysis of enamel and dentin after the application of stannous flouride
No full textFTIR, Raman and SEM analysis of enamel and dentin after the application of stannous flouride
No full textAnalysis of enamel and dentin performed by Raman, SEM and FTI
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
MTA apexification in a traumatic lesion: a case report
No full textIntroduction:
Mineral trioxide aggregate is a recently introduced dental material. It may be used to seal perforations, make retrograde fillings in root-end resections, seal open apices or cap vital pulps. Studies have suggested that MTA provides a better seal than formerly used materials such as IRM, amalgam, and Super-EBA. Further, MTA has low cytotoxicity and excellent biocompatibility. In vivo studies demonstrated a beneficial effect of MTA on pulpal and periodontal regeneration. Although controlled randomized clinical trials are still missing, MTA appears to be a suitable material to tightly seal dental hard tissues from the periodontium.
Case report:
A case of severe crown fracture and luxation in the upper permanent incisors of a 6-year-old boy is reported. The boy presented an extrusive luxation and enamel fracture of 2.1, a lateral luxation of 1.1. The teeth was repositioned and fixed with a termoplastic resin device for two weeks. Eighteen months later a discromy appeared and the vitality tests showed that necrosis of 1.1 and 2.1 occurred.
The teeth was treated with calcium hydroxide, but as there was no apical stop after 2 years of treatment, it was decided to use a new root-end filling material: mineral trioxide aggregate (MTA).
Endodontic treatment was performed and MTA was used as filling material. The boy has been followed for four years with clinical and radiographic examinations every six months during the first two years and then every years.
At follow-up 4 years later the tooth was asymptomatic and radiographically showed the repair of the apex and absence of radiolucent apical lesion.
Conclusion:
This case report demonstrates the placement of an apical barrier using MTA as an alternative to conventional calcium hydroxide therapy. One negative aspect of the apexification with calcium hydroxide is that the treatment can take a very long time and complications can then appear. Many authors has already demonstrated that MTA has very good root sealing abilities, so it can be correctly used as a root-end filling material. Nevertheless, more long-term follow-up studies in humans are necessary to confirm these conclusions.
References
1.Torabinejad M, Chivian N. Clinical applications of mineral trioxide aggregate. J Endod 1999;3: 197–205.
2.Giuliani V, Baccetti T, Pace R, Pagavino G. The use of MTA in teeth with necrotic pulps and open apices.Dent Traumatol. 2002 Aug;18(4):217-21
3.Joffe E. Use of mineral trioxide aggregate (MTA) in root repairs. Clinical cases. N Y State Dent J. 2002 Jun-Jul;68(6):34-6.
4.Hayashi M, Shimizu A, Ebisu S MTA for obturation of mandibular central incisors with open apices: case report. J Endod. 2004 Feb;30(2):120-2
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
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