202,961 research outputs found
Viaggi, ritorni e salti di Giovanni Grasso
No full textRecensione a "L’arte di Giovanni Grasso e le rivoluzioni teatrali di Craig e Mejerchol’d" di Gabriele Sofi
Thermal and thermo-chronological constraints to burial-exhumation history of Eastern Sicily fold-and-thrust belt
No full textIl grasso del latte: membrane, composizione e struttura
No full textComposizione del grasso del latte. Struttura della membrana del globulo di grasso del latte. Membrane biologiche
Late Quaternary endorheic basins recording climate changes during Holocene and pre-Holocene times. Results and work in progress. In: Pre-Congress Field Excursion B 30 - The neogene thrust-top basins in central Sicily and the neogene volcanism of the northern Monti Iblei in south-eastern Sicily
No full textIn situ monitoring of powder bed fusion homogeneity in electron beam melting
Get PDFIncreasing attention has been devoted in recent years to in situ sensing and monitoring of the electron beam melting process, ranging from seminal methods based on infrared imaging to novel methods based on backscattered electron detection. However, the range of available in situ monitoring capabilities and solutions is still quite limited compared to the wide number of studies and industrial toolkits in laser-based additive manufacturing processes. Some methods that are already industrially available in laser powder bed fusion systems, such as in situ detection of recoating errors, have not yet been investigated and tested in electron beam melting. Motivated by the attempt to fill this gap, we present a novel in situ monitoring methodology that can be easily implemented in industrial electron beam melting machines. The method is aimed at identifying local inhomogeneity and irregularities in the powder bed by means of layerwise image acquisition and processing, with no external illumination source apart from the light emitted by the hot material underneath the currently recoated layer. The results show that the proposed approach is suitable to detect powder bed anomalies, while also highlighting the link between the severity of in situ detected errors and the severity of resulting defects in the additively manufactured part
PROGETTO DEL WATERFRONT DEL PORTO TURISTICO DI MARINA DI RAGUSA. ARCH. MARIA GIUSEPPINA GRASSO CANNIZZO
No full textViene illustrato il progetto non realizzato, a firma di M. G. Grasso Cannizzo, per i nuovi servizi portuali e la viabilità al margine dell'area portuale di Marina di Ragusa (RG)
- …
