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A novel bone scraper for intraoral harvesting: a device for filling small bone defects
No full textAim: To evaluate histologically the morphology and characteristics of bone chips harvested intraorally by Safescraper (R), a specially designed cortical bone collector.Material and methods: Bone chips harvested near a bone defect or in other intraoral sites were grafted into a post-extractive socket or applied in procedures for maxillary sinus floor augmentation or guided bone regeneration. Core biopsies were performed at implant insertion. Undecalcified specimens embedded in PMMA were studied by histology, histochemistry and SEM.Results: Intraoral harvesting by Safescraper (R) provided a simple, clinically effective regenerative procedure with low morbidity for collecting cortical bone chips (0.9-1.7 mm in length, roughly 100 mu m thick). Chips had an oblong or quadrangular shape and contained live osteocytes (mean viability: 45-72%). Bone chip grafting produced newly formed bone tissue suitable for implant insertion. Trabecular bone volume measured on biopsies decreased with time (from 45-55% to 23%). Grafted chips made up 50% or less of the calcified tissue in biopsies. Biopsies presented remodeling activities, new bone formation by apposition and live osteocytes (35% or higher).Discussion and conclusions: In conclusion, Safescraper (R) is capable of collecting adequate amounts of cortical bone chips from different intraoral sites. The procedure is effective for treating alveolar defects for endosseous implant insertion and provides good healing of small bone defects after grafting with bone chips. The study indicates that Safescraper (R) is a very useful device for in-office bone harvesting procedures in routine peri-implant bone regeneration
Nella Milano secentesca degli affari : tra Mediterraneo e "Oltremonte"
No full textIn the business world of seventeenth-century Milan: between the Mediterranean and
“Oltremonte”.
The essay is part of a research initiative undertaken recently by historians that deals
with seventeenth-century Milanese economy, that is to say, the study of the high-profile
tertiary sector which was active in the international market: merchants, bankers and
money-changers. It analyzes important aspects of the professional activities of foreign businessmen engaged in business and financial intermediation in seventeenth-century Milan, whose skills in managing business and social relationships enabled their descendants to occupy prominent positions in the Public Administration and to obtain titles of nobility. The documents which regard the protagonists of this study also made it possible to contribute to an area of studies heretofore unconcerned with Spanish Milan, the study of lifestyles. The final section of the essay is therefore devoted to a reflection on the lifestyles of two components of the same family branch, but members of different classes: a shopkeeper and a marquis who was born a merchant and later ennobled
Note sui rapporti tra Roma e l'Italia nel XVI e nella prima metà del XVII secolo
No full textIl saggio prende in considerazione i rapporti tra la Santa Sede e i principi italiani nella prima età moderna. Roma tende a presentersi come la tutrice della libertà d'Italia e come colei che ha preservato la penisola dagli attacchi dei turchi. In realtà, alcuni pontefici, procedendo all'inglobamento di Ferrara, Urbino, Castro nello Stato della Chiesa si caratterizzarono più come oppressori della libertà d'Italia che come suoi tutori. In ogni caso, a Roma guardavano i principi italiani come al luogo ove era la più grande e fastosa corte della penisola, ove si potevano acquisire ranghi e incarichi di prestigio, ove fosse possibile coltivare un senso di identità italiana che aveva il suo più valido sostenitore nel papa
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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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