1,721,097 research outputs found
OPERAZIONI DI PRIVATE EQUITY E PERFORMANCE ECONOMICO-FINANZIARIE DELLE PMI ITALIANE Evidenze dal settore meccanico
No full textThis paper investigates the relation between corporate financing through private equity and the effects on backed firms’ performance. In particular, using a dataset of Italian small and medium enterprises (SMEs), the study explores the distributions of private equity operations within the Italian SMEs in 2003. Specifically, the paper analyses the impact of private equity on the backed firms’ performance, with reference to the most involved industry by the institutional investors.
The results confirm the positive association between private equity financing and firms performance, and report significant differences between the performance of backed firms and of a benchmark of non-backed ones
Coral granules in the repair of human mandibular defects
No full textBook with contributes of studies on biomaterial
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
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
Osteoconduzione del Fosfato Tricalcico e del Corallo
No full textGranuli di Fosfato Tricalcico (TCP) o di Corallo madreporico sono stali impiantati in cavità post-estrallive di 14 Uomini adulti; dopo 3-75 mesi, in dascun soggetto è stata effettuata una biopsia, poi fissata in paraformaldeide e inclusa in PMMA, e quindi trattata per il microscopio ottico, SEM e microsonda a raggi-X. I risultati dimostrano che tra i granuli di Corallo l'osso neoformato è già presente dopo 3 mesi, mentre tra i granuli di TCP non compare prima di 6 mesi. I granuli di Corallo scompaiono dalle biopsie dopo 10-12 mesi, mentre granuli di TCP hanno dimensioni simili a quelle iniziali anche dopo 15 mesi di impianto. L'osso neodeposto, inoltre, viene assai più estesamente a diretto contatto con il Corallo che con i granuli di TCP. La microsonda ai raggi-X dimostra infine che l'osso a ridosso del Corallo ha un contenuto minerale più elevato. La neodeposizione avviene pertanto in tempi più brevi e con migliori modalità negli impianti di Corallo rispetto a quelli di TCP; la più elevala capacità riparatrice di difelli ossei mostrata dal Corallo è verosimilmente da attribuire alla maggiore reattività del Carbonato di Calcio rispetto a quella del Fosfato.The alveolar cavities, obtained after the removal of a toolh in 14 adult men, were filled with TriCalcium Phosphate (TCP) or Coral; from 3 to 75 months after the implant, a biopsy was made and processed for optical microscope, SEM and X-ray microanalysis. The results show that bone tissue is present among the Coral granules after 3 months, whereas around TCP granules bone does not appear before 6 months; Coral granules disappear from biopsies after 10-12 months, whereas TCP granules have the same size as at the start even after 75 months; there is direct bone-Coral contact but only a partial bone-TCP contact. X-ray microanalyses show that the bone mineralization is higher close to the Coral than near the TCP. In conclusion, the new bone formation appears to take place at a higher rate in Coral implants than in TCP ones; the higher capability shown by Coral in bone defect repair is probably due lo the higher reactivity of Calcium Carbonate with respect to Calcium Phosphate
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