1,721,210 research outputs found
Figure 1 in On two syntopic species of Euscorpius Thorell, 1876 (Scorpiones: Euscorpiidae) in and nearby San Marco fortress (Veneto, Italy): a preliminary investigation
No full textFigure 1: San Marco fortress, a view of the inner northern side (photo by G. Colombo).Published as part of Colombo, Marco, 2009, On two syntopic species of Euscorpius Thorell, 1876 (Scorpiones: Euscorpiidae) in and nearby San Marco fortress (Veneto, Italy): a preliminary investigation, pp. 1-14 in Euscorpius 87 (87) on page 2, DOI: 10.18590/euscorpius.2009.vol2009.iss87.1, http://zenodo.org/record/467339
Lezioni di Odontoiatria Conservativa
No full textQuesto manuale, destinato agli studenti del corso di laurea magistrale in odontoiatria e del corso di laurea in igiene dentale, nasce allo scopo di fornire una guida per lo studio dell’odontoiatria conservativa. Dopo un breve excursus storico, inizia con cenni di istologia e di anatomia dentale, indispensabili per la comprensione degli stretti rapporti che intercorrono fra le diverse parti del dente; vengono quindi trattate l’eziopatogenesi e l’anatomia patologica del processo carioso, causa principale della necessità di interventi riparativi sugli elementi dentali. Un capitolo è dedicato agli strumenti di normale uso in odontoiatria conservativa ritenendo importante conoscere i mezzi a disposizione dell’operatore. Prima di passare alla parte clinica viene riservato ampio spazio allo studio dei materiali dentali con particolari riferimenti e precise indicazioni per il loro utilizzo clinico. Con queste nozioni di base è possibile impostare un discorso operativo che in grado considerare le varie evenienze cliniche e di fornire le indicazioni e i suggerimenti per giungere a un risultato quanto più valido e duraturo possibile. Poiché è impensabile che si possa focalizzare l’attenzione su un solo aspetto di una situazione che può essere più complessa, vengono anche trattati i rapporti che l’odontoiatria conservativa può contrarre di volta in volta con le altre discipline odontoiatriche. Solo in questo modo e possibile non incorrere nell’errore, purtroppo comune, di considerare i problemi da un solo punto di vista, trascurando una visione più ampia che permetterebbe, non certo di eliminare, ma senza dubbio di diminuire le possibilità di insuccesso
Lezioni di Odontoiatria Conservativa
No full textIl manuale rappresenta una guida esaustiva per gli studenti di odontoiatria e igiene dentale, pensata in due parti: la prima teorica, la seconda clinica e operativa. In apertura ci sono brevi cenni su istologia e anatomia dentale, successivamente vengono trattate l’eziopatogenesi e l’anatomia patologica del processo carioso, causa principale della necessità di interventi riparativi sugli elementi dentali. Prima di approfondire gli aspetti operativi, viene riservato ampio spazio alle basi indispensabili per una corretta pratica, come gli strumenti di normale uso in odontoiatria conservativa e lo studio dei materiali dentali con precise indicazioni per il loro utilizzo clinico. Con lo scopo di creare un quadro cognitivo e operativo completo vengono, infine, approfonditi anche i rapporti dell’odontoiatria conservativa con le altre discipline odontoiatriche
Microstructures and mechanical properties of innovative Al-Si-Mg alloys.
Full text linkWhen considering structural applications, the maximum temperature of use of Aluminum alloys is limited by
the degrading mechanical properties of Aluminum with temperature and, in the case of age-hardenable
alloys, by the thermal stability of the precipitates formed during heat treatments. The addition of elements
promoting the precipitation of coarsening-resistant particles, is one of the major and most effective ways to
improve mechanical properties at elevated temperature. In this regard, transition elements and rare earths,
added in fractions of unity in weight percent in the base alloy, can cause tremendous improvements in the
thermal resistance of Al alloys. The present contribution focuses on specific additions made to a
conventional Al-7Si-Mg casting alloy (A356). A set of alloys has been designed and cast with different Er and
Zr additions. The microstructures of the alloys were characterized by means of optical micrographs, which
showed the effectiveness of Er in modifying the Si eutectic, similarly to Sr, already in the as -cast state. Heat
treatment cycles were performed and characterized by means of microhardness tests. It was found that,
increasing the concentration of Er and Zr, the microhardness of the alloys in the peak hardness and after
prolonged exposure to high temperatures was higher than that of the reference alloy
Ontogeny of an arlequin: morphological and colour pattern changes from juvenile to adult in Gnathophyllum elegans (Risso, 1816) (Decapoda: Palaemonidae), traced through citizen science and social media data mining
No full textManunza, Bruno, Colombo, Marco, Crocetta, Fabio (2020): Ontogeny of an arlequin: morphological and colour pattern changes from juvenile to adult in Gnathophyllum elegans (Risso, 1816) (Decapoda: Palaemonidae), traced through citizen science and social media data mining. Zootaxa 4881 (3): 597-600, DOI: https://doi.org/10.11646/zootaxa.4881.3.1
Characterization of innovative Al-Si-Mg-based alloys for high temperature applications
No full textThe role played by transition elements and rare earths, added in small quantities (fractions of unity in weight percent) was proved by several authors to be beneficial for the age-hardening response and for the microstructural stability at high temperature of Al-based alloys. The paper illustrates the results of an experimental investigation on the effects of erbium (Er) additions on the microstructural features, microstructural stability and mechanical properties of an Al-7Si-0.4Mg alloy of wide industrial use. The effects are multifold: in the cast microstructure, a silicon (Si) eutectic modification was observed with the formation of several Er-containing intermetallic phases. After solution treatment and aging, an increase in peak hardness and an enhanced microstructural stability were obtained. In this preliminary study, the beneficial effects of Er additions were confirmed
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
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