Search results for "hell"
showing 10 items of 1035 documents
Comparative Study for Springback Prediction on Single Point Incremental Forming Process
2014
The present paper proposes a comparative study in order to determine the springback in single point incremental forming process. Using the Ls-Dyna software the process was simulated for one piece in frustum of pyramid shape. In the end of the explicit dynamic analysis, it was run, using the same software, an implicit analysis to determine the springback. For this comparison study we selected four different shell formulations. The results obtained in this simulation were compared with those obtained experimentally for the same part. The experimental research was conducted on a robot and, on the opposite side of the machined surface, an Aramis measuring optical system was placed to allow the …
Influence of a density mismatch on TMPTMA shells nonconcentricity
2011
Some laser target designs require low-density organic foam shells to study fusion on the French high-power laser laser mega joule. Low-density trimethylolpropane trimethacrylate foam shells composed of C, H, and O, 2 mm diameter, 100-μm wall thickness, and 250 mg cm−3 density are synthesized by a microencapsulation technique using a droplet generator. These shells have to reach a sphericity higher than 99.9% and a nonconcentricity (NC) lower than 1%. The wall thickness variation is one of the most difficult specifications to meet. An important factor in reducing this defect is the density matching between the three phases of the emulsion at polymerization temperature. The influence of a den…
Un viaje de ida y vuelta al otro mundo. El Cabaret del Diavolo de Gino Gori y Fortunato Depero en Roma (1922-1925)
2023
The Roman cabarets linked to Futurism were meeting places where the programme of the manifesto Ricostruzione futurista dell’universo was applied. Following the experiences of Bragaglia and Marchi at the Circolo delle Cronache d’Attualità and the setting by Giacomo Balla at the Bal Tic Tac, the entrepreneur and poet Gino Gori commissioned Fortunato Depero to decorate the Cabaret del Diavolo. Based on Dante’s Commedia, Depero would create an integral design of three spaces that configured an allegorical inverted reading of the Florentine poet’s journey to the afterworld. Its originality and careful advertising made the cabaret one of the representative spaces of the Roman nightlife which, des…
GIV noroviruses and other enteric viruses in bivalves: a preliminary study.
2012
We evaluated the presence of the enteric viruses: norovirus, adenovirus, enterovirus, astrovirus, hepatitis A virus, and hepatitis E virus in bivalves using nested PCR methods and cell culture assays. Noroviruses GII.4 and GIV.1, adenoviruses types 1 and 2, hepatitis A, and echovirus type 7 were detected in the shellfish tested, which were often co-infected. This is the first study to detect such a high level of viral contamination in Italian mussels (up to four different viral groups in a single sample), and the first to document the presence of GIV NoV in shellfish.
55-Atom clusters of silver and gold: Symmetry breaking by relativistic effects
2006
Abstract Anionic 55-atom clusters of gold and silver are studied using density functional theory, scalar relativistic ab initio pseudopotentials and self-consistent generalized gradient corrections. An almost perfect icosahedron is found to be the clear ground state of Ag 55 - , and its electronic density of states agrees almost perfectly with recently measured high-resolution photoelectron spectra, up to the magnitude of the splitting of the highest free-electron shells by the Ih crystal field. A comparison between theory and a recent experiment allows one to assign icosahedral-based structures also for the Ag 57 - cluster. On the other hand, the Au 55 - cluster has several close-lying low…
The formation and mineralization of mollusk shell.
2011
27 pages; International audience; In the last years, the field of mollusk biomineralization has known a tremendous mutation. The most recent advances deal with the nanostructure of shell biominerals, and with the identification of several shell matrix proteins: on one hand, the complex hierarchical organization of shell biominerals has been deciphered in few models, like nacre. On the other hand, although proteins represent a minor shell component, they are the major macromolecules that control biocrystal synthesis. Until recently, the paradigm was to consider that this control occurs by two antagonist mechanisms: crystal nucleation and growth inhibition. Emerging models try to translate a …
Le città costiere di Sicilia e le loro architetture nella “memoria” di viaggio di Giovan Battista Pacichelli (1685)
2014
Il resoconto del viaggio che l’abate toscano Giovan Battista Pacichelli (1640-1702) compie in Sicilia nel 1684, Moderno stato della Sicilia, compreso dalla sua navigatione e passeggio, è parte integrante di una più ampia opera in cinque volumi intitolata Memorie de’ viaggi per l’Europa christiana …., edita a Napoli nel 1685. Il testo restituisce l’immagine urbana di alcune delle principali città costiere dell’isola, oggetto della sua visita, nonché una descrizione, in alcuni casi puntuale e resa con dovizia di particolari, delle architetture da lui selezionate. Il testo fornisce il punto di vista di un autentico viaggiatore, come si evince dalla grande quantità di luoghi da lui visitati, e …
Glasgow ou l’Écosse urbaine dans les poèmes de Hugh MacDiarmid
2012
Hugh MacDiarmid is sometimes still thought a parochial poet, mostly interested in the depiction of rural Scotland. However, in the 1930s, he wrote several poems about the city of Glasgow but his work on urban predicaments has been largely forgotten. In his Glasgow sequence, MacDiarmid, along with many other writers in the 30s, redefines Scotland as an urban nation. Post-industrial Glasgow urges the whole country to ‘re-write’ itself and the canonical representation of rural Scotland to fade away. Scotland is mercilessly deconstructed in Glasgow 1938: Glasgow is no longer ‘a dear green place’, Scotland no longer a land of peasants but urban hell where filthy disease and dirty capitalism spre…
Potential and limitation of combining terrestrial and marine growth records from Iceland
2017
Abstract Seasonally formed, perennial growth increments of various organisms may possibly contain information about past environmental changes, well before instrumental measurements occurred. Such annually resolved proxy records have been mainly obtained from terrestrial archives, with a paucity of similar data originating from marine habitats. Iceland represents ideal conditions to develop both, tree ring (dendro) and bivalve shell (sclero) chronologies from adjacent sites. Here we introduce the first network of Icelandic birch (Betula pubescens Ehrh.) and rowan (Sorbus aucuparia) dendrochronologies, as well as ocean quahog (Arctica islandica L.) sclerochronologies. In order to identify th…
The shell-forming proteome of Lottia gigantea reveals both deep conservations and lineage-specific novelties
2013
19 pages; International audience; Proteins that are occluded within the molluscan shell, the so-called shell matrix proteins (SMPs), are an assemblage of biomolecules attractive to study for several reasons. They increase the fracture resistance of the shell by several orders of magnitude, determine the polymorph of CaCO(3) deposited, and regulate crystal nucleation, growth initiation and termination. In addition, they are thought to control the shell microstructures. Understanding how these proteins have evolved is also likely to provide deep insight into events that supported the diversification and expansion of metazoan life during the Cambrian radiation 543 million years ago. Here, we p…