841 research outputs found
The Time Of Flight (TOF) system of the ALICE experiment
No full textThe double-stack Multigap Resistive Plate Chamber (MRPC) is the detector chosen for the large Time-Of-Flight system of the ALICE experiment at CERN LHC. The TOF barrel has to cover an area of 160 m and has to be highly segmented (160.000 readout pads of cm) in order to keep the occupancy at the 15% level. In this article recent results on several prototype MRPCs are presented, with particular emphasis on the study of the uniformity of these devices
Lavorare per la rivoluzione. Un'impresa commerciale tra Italia e Cina
No full textThe volume collects the biographical testimony of Fabio Matteini who, starting from the ’60s, undertook an import activity of Chinese handcra products with the aim of supporting the political and cultural initiative of the Edizioni Oriente of Milan, the main center for the spread of Maoism in Italy. The testimony is accompanied by a prefatory essay by Gilda Zazzara on Matteini work culture and by a selection of photographs taken by the author during the years of the Cultural Revolution, chosen and introduced by Silvia Calamandrei
Gilda & Mário: thematic notes and musical style
No full textO presente texto endossa a suspeita de Bento Prado Jr. (1937-2007) de que haveria certa continuidade entre os temas e o estilo de Mário de Andrade (1893-1945) e Gilda de Mello e Souza (1919-2005). Tomando a música como paradigma, ao retomar, uma a uma, as relações temáticas propostas por Prado Jr., propõe-se pensar o conceito marioandradiano de inacabado como um elemento da estética de Gilda. Espera-se, com isso, contribuir para uma compreensão mais aprofundada da forma ensaística em nossa autora enquanto um posicionamento, mais do que teórico, social.This current text endorses Bento Prado Jr.’s (1937-2007) suspicion that there would be some continuity between the themes and style of Mário de Andrade (1893-1945) and Gilda de Mello e Souza (1919-2005). Considering music as a paradigm, by taking up, one by one, the thematic relationships suggested by Prado Jr., it is proposed, in this work, a debate regarding the Mario-Andradian concept of unfinished as an element of Gilda’s aesthetic. It is hoped, therefore, to contribute to a deeper understanding of the essayistic form practiced by the author as a more social than theoretical position
An Integrated Strategic Framework for the Urban Development of Favela Dique da Vila Gilda in Santos, Brazil
No full textFavela Dique da Vila Gilda is located in a complex region, having large areas of valuable natural environments which are put under pressure by the rapid urbanization processes. The slum areas in the region, among other Vila Gilda, are together with the industrial areas the main polluters of the environments. In turn, this is also affecting the living environments of the favelas themselves. Current slum upgrading projects do not respond well to the living and environmental problems, and often result in fragmented iverse local interventions, executed by a various stakeholders. This research project aims to propose an integrated strategic framework for slum upgrading, that could be used to coordinate en integrate these developments.Spatial Planning & StrategyUrbanismArchitecture and The Built Environmen
Gli artigiani metallurghi e il processo formativo nelle"Origini" degli Etruschi
No full textIn the most recent years, genetic analyses applied to archaeology, sometimes conflicting within each others, have reignited the debate around the origin of the Etruscans. Famous archaeologists have brought back the theory of the migration from the East. According to the Author, between the Bronze Age and the Iron Age in Etruria no data from material culture and social practices could justify unequivocally such a migration. The adoption of the funerary ritual of cremation in terracotta urns appears to be the greatest and most radical rupture in the archaeological record after 1200 B.C.E. In this phenomenon an European-Continental aspect prevails and no ethnical link with the East could be related to it. In the Late Bronze Age, the conclusion of the formation process of the huge urban agglomerations, which was begun in the Middle Bronze Age, occurred with no comparanda outside the Etruscan territory. Levantine and Greeks contributed to this formation process during their expansion towards the West up to the Atlantic coasts, while trading with coastal towns, attracted especially by the mineral richness of the central Tyrrhenian sea. Their contribution consisted of techniques, ideas and even people, remaining always at the margins of the society, and continued constantly in the following centuriesNegli ultimi anni le analisi genetiche per lo più in antitesi hanno riacceso il dibattito sulle origini degli Etruschi e archeologi illustri hanno riproposto una migrazione dall’Oriente. Secondo l’A. nella cultura materiale e nelle pratiche sociali riconoscibili fra età del Bronzo ed età del Ferro nel territorio dell’Etruria storica, nulla si incontra che possa inequivocabilmente accreditare un modello migrazionistico ; il più marcato e radicale cambiamento di cui la documentazione dia testimonianza consiste, a partire da circa il 1200, nell’adozione del rito funerario dell’incinerazione in urna di terracotta. C’è un aspetto chiaramente europeo-continentale e non si può certo invocare a conforto degli apporti etnici da Oriente. Alla fine dell’età del Bronzo si conclude il processo formativo, iniziato verosimilmente nella piena età del Bronzo, con l'emergere delle gigantesche agglomerazioni urbane, prive praticamente di confronti fuori del territorio etrusco. Levantini e Greci, nel loro moto espansivo verso Occidente fino alle coste atlantiche, nella frequentazione delle città costiere e delle connesse ricchezze minerarie del medio Tirreno, che di quel moto erano certamente uno dei principali obbiettivi, hanno contribuito a questo processo formativo con l’apporto di tecniche, idee e persone anche socialmente ai margini, apporto che continuerà abbondantemente nei secoli successivi
Typability and type inference in atomic polymorphism
No full textIt is well-known that typability, type inhabitation and type inference are
undecidable in the Girard-Reynolds polymorphic system F. It has recently been proven
that type inhabitation remains undecidable even in the predicative fragment of system F
in which all universal instantiations have an atomic witness (system Fat). In this paper we
analyze typability and type inference in Curry style variants of system Fat and show that
typability is decidable and that there is an algorithm for type inference which is capable of
dealing with non-redundancy constraints.The second author acknowledges the support of FCT — Fundação para a Ciência e a Tecnologia under the
projects UIDB/04561/2020, UIDB/00408/2020 and UIDP/00408/2020, and she is also grateful to CMAFcIO —
Centro de Matemática, Aplicações Fundamentais e Investigação Operacional and to LASIGE — Computer
Science and Engineering Research Centre (Universidade de Lisboa).info:eu-repo/semantics/publishedVersio
I diritti violati: la tutela nazionale e internazionale dei minori
No full textThe article offers some reflections based upon papers discussed in a Congress whose topic was the legal system of protection of minors. The idea that runs under the discussion is the recognition of the role of a minor as subject of individual rights, since for many years minors has been invisible, and considered only as object of a protection directed toward the family or the society. Child abuse has been considered, as long as the perspective of the minor as author of crimes, in connection with the problem of the age of accountability, and of that of different and specific forms of detention measured on the characteristic of young persons viewed under the influence of UE and international legislation. Child abuse has been particularly focused in a comparative perspective, with data coming from the experience of African and South American countries and from the jurisprudence of the Inter-American Court of Human Rights. Child work and child labour too has been detected, with a special reflection given to the drama of child soldiers, that has recently been recognized: The ICC in March 2012 has in her first decision found Thomas Lubanga, former Chief Officer of a rebel Militia in Congo, guilty of war crimes for having recruited as soldiers a large amount of children under the age of 15
Experimental study of the time resolution for particle detectors based on MRPC, SiPM and UFSD technologies
No full textThe work here presented describes in details an extensive study of the time resolution of various detectors. Precise time measurements are of funda- mental importance both in particle and in medical physics; even more, an excellent time resolution (tens of ps) will be necessary for the next generation of colliders in high energy physics, facing also the challenging request of a high rate capability.
Several detectors have been studied, spanning several technologies from gaseous to silicon: Multigap Resistive Plate Chamber (MRPC), Silicon PhotoMulti- plier (SiPM) and a new prototype of silicon detectors, the Ultra Fast Silicon Detector (UFSD). These studies have been performed both in a cosmic ray setup, at the INFN Bologna laboratories, and in a beam test setup, in the T10 and H8 beam lines at CERN. The R&D on time resolution for all the three technologies has been performed with different detector designs. The study showed promising results; indeed all the detectors reached a final time resolution smaller than 70 ps, with a minimum value of 35 ps. For the MRPC, an attempt to improve also the rate capability has been successfully realised. Moreover, a study based on data analysis has been performed for the ALICE TOF detector (based on the MRPC technology); possible degradations of the time resolution related to signals in two adjacent readout pads have been investigated and corrected, allowing an improvement of the final TOF time resolution
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