504 research outputs found
Un filo d'erba tra le macerie
No full textPresentazione del romanzo inedito "Il maglione rosso" di Mario Sturani pubblicato per la prima volta a sett'anni dalla stesura
Mario ed Enrica Labò, traduzione e mediazione culturale nel secondo dopoguerra
No full textL’eredità culturale e materiale di Mario e Giorgio Labò viene raccolta e delineata attraverso la composizione di saggi e contributi sviluppati su diversi piani disciplinari, consentendo di comprenderne l’importanza e il rilievo critico e morale dell’azione svolta. Il saggio illustra l'opera di mediazione culturale, in forma di traduzione, dei coniugi Mario ed Enrica Labò nel periodo successivo alla seconda guerra mondiale
Esempio pratico dell'influenza della termoregolazione di stampi nella presso colata di leghe zama
No full textLight alloys: from traditional to innovative technologies
No full textSelection of materials with the expected, application-dependent characteristics constitutes a very important point in any industrial application. In the automotive and aeronautical industries, the current tendency is to use light metals and their alloys for production of various components. For example, some of the problems related to fuel consumption and weight reduction could be partially solved by using such alloys as an alternative to traditional iron-based alloy components. Due to their very attractive properties, the most commonly employed light materials for producing high-stressed components are aluminium, magnesium and their alloys. Al-based alloys have a high strength/weight ratio, good formability, excellent combination of castability and mechanical properties which together with an excellent corrosion resistance make them very appropriate for a large variety of applications. There are two important families of aluminium alloys: (i) wrought alloys, firstly cast as ingots and/or billets and then mechanically hot- and/or cold-worked into the preferred shape, and (ii) cast alloys, directly cast into their final form through different traditional or innovative processes. At the same time, there is continuing interest in Mg alloys for engineering proposals because of their lowest density directly connected to a weight saving of about 40% compared to steel and cast iron and 20% compared to aluminium for the same component performance. Their high specific strength, good castability and machinability, high thermal conductivity, high dimensional stability, good electromagnetic shielding property, high damping characteristics and full recyclability place them in a particular position for production of different types of components. High-pressure die casting is the most widely used technique and represents about 50% of all light alloy casting production. The tendency to use low-pressure die casting is increasing (it accounts for about 20% of all production). Gravity die casting, a small but growing contribution derived from a vacuum die casting and squeeze casting process, represents the remaining share of manufacturing processes. Generally, during solidification in a traditional manufacturing process, volume contraction is observed. This is due to the wrong feeding system and/or gas development, which in turn generate some voids or cavities within a casting, which are in turn responsible for the presence of defects in the casting components. For these reasons, the research community and manufacturing industries are giving a high level of attention to the development of innovative production procedures. In this context, semi-solid metal processing is able to attain at least the same level of properties and performances as those obtained by conventional techniques. Progresses in materials development represent a valid support for enhancing the life of an engineering component and its reliability. In this chapter, a general overview of the actual scenario concerning the production and use of light alloys will be presented, including a short history and description of state-of-the-art techniques integrated with some results of the current research in this field carried out by the author
Applicabilità dell’analisi estetica nella riabilitazione odontoprotesica attraverso il lavoro di team.
No full textStudio del processo di sinterizzazione reattiva applicato ad acciai inossidabili
No full textIn the present work reactive powders, mixed to stainless steel ones, have been used to increase the density of sintered parts, through the generation of a liquid phase. High density is connected to porosity decrease and also to transformation from open to close pores: this increases also the corrosion behaviour and the mechanical properties
Francisco de Aldana y los claroscuros de Venus: las «Octavas sobre los efectos de amor»
No full textIn his Octavas “on the effects of love”, an apparently eccentric poetic essay, Aldana develops the Ficinian motif of the “Terrestrial Venus” through a complex intertextual dialogue with classical and Italian authors. In this paper, we shall demonstrate the ambitious poetization of some ideas exhibited in the trattati d’amore, especially under Mario Equicola’s influence.En las «Octavas sobre los efectos de amor», aparentemente «una muestra de poesía extravagante», Aldana desarrolla el motivo ficiniano de la «Venus vulgar», entablando un complejo diálogo intertextual con autores clásicos e italianos. En estas páginas vamos a demostrar la ambiciosa poetización de algunas ideas expuestas en los trattati d’amore, sobre todo, bajo la influencia de Mario Equicola
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