284 research outputs found
Tra utopia e futurismo: strutture italiane all’estero nella seconda metà del Novecento
No full textA partire dagli anni Cinquanta e Sessanta del Novecento, mentre l’ingegneria italiana vive la sua età dell’oro, si assiste alla diffusa tendenza da parte di progettisti e imprese nazionali a cercare fortuna oltre confine. Stimolano questa propensione sia le trasformazioni del Paese conseguenti al boom economico e ai successivi, difficili anni di crisi economica e politica, sia il crollo degli imperi coloniali e dei loro regimi protezionistici, con la conseguente
apertura di mercati prima inaccessibili. Uno studio specifico, condotto nell’ambito della ricerca SIXXI, in corso presso l’Università di Roma Tor Vergata, è stato riservato all’attività degli italiani che, dal secondo dopoguerra, si dedicano alla realizzazione all’estero di grandi strutture, per verificare se anche le opere esportate presentino, pur in un diverso contesto, i tratti distintivi e identitari dell’ingegneria Made in Italy. Dagli studi è emerso che a parte Pier Luigi Nervi – l’unico che ha veramente l’occasione di vedere le sue opere costruite nei cinque continenti –, gli italiani riescono a operare in questi anni quasi esclusivamente nel cosiddetto Terzo mondo e nelle nazioni in via di sviluppo. Nel settore delle grandi dighe le imprese conquistano, effettivamente, una rilevante fetta di mercato degli enormi appalti finanziati dalla Banca Mondiale per stimolare l’industrializzazione in Africa, Asia e Sudamerica, ma realizzano per lo più opere progettate da grandi società d’ingegneria straniere. I lavori nei Paesi più avanzati tecnologicamente, invece, come quelli dell’Europa occidentale, gli Stati Uniti e il Giappone restano sostanzialmente fuori dalla portata delle ditte italiane e del loro caratteristico modo di costruire e, soprattutto, dei migliori rappresentanti della nostra Scuola di ingegneria.
Per rintracciare all’estero strutture Italian style bisogna allora guardare anche a una particolare produzione: quella costituita dai progetti più visionari e utopici, tanto degli ingegneri – compresi i Maestri della Scuola – quanto degli architetti che cercano di esportare un’interpretazione «artistica» della struttura, inquadrandola nella più ampia vicenda della storia dell’ingegneria italiana del Novecento
La predicazione duecentesca su s. Pietro Martire
No full textStudio sull'immagine di Pietro Martire diffusa nella predicazione domenicana in Italia e in Europa
Perché una ricerca non standard?
No full textMany migration studies are devoted to the representations that local residents have about foreigners. Less numerous are the research focusing on the representations that foreigners have of the native majority or other minorities. The book of which this essay is part shows the results of a study conducted between 2010 and 2011, by which we wanted to put ourselves in listening immigrants from China, often the victims of stereotypes and prejudices, because they are considered members of a community " closed and isolated". How Italians are, in their eyes? To answer this question we interviewed 41 Chinese immigrants who live permanently in Rome. The in-depth interviews allowed us to collect stories and life experiences: this was the main communication vehicle for the emergence of representations and values. The essay is methodological. In the first part I deal with the differences and the possibility of integration between qualitative and quantitative research. In the second part I describe the features of the qualitative approach that are best suited to the objectives our research ( to make the interviewee protagonist of a process of listening , build empirical material as little as possible affected by the researcher's conceptual schemes , etc.) and main problems of our research (interview people for which the Italian language can be a barrier difficult to overcome , especially when you ask them to talk about attitudes, opinions and values)
The Development of Submerged Floating Tunnels as an innovative solution for waterway crossings
No full textThe present Thesis is organized in 10 chapters. In particular Chapter 1
gives a general overview of the modern solutions and technologies available
in the field of waterway crossings, introducing briefly the revolutionary
concept of Submerged Floating Tunnel.
Chapter 2 provides a deeper insight into the main characteristics of this
innovative structural solution for waterway crossings: first its structural
features are described and the relevant loading conditions discussed,
subsequently the main advantages of the SFT with respect to the traditional
crossing solutions, such as the Cable Supported Bridges and the Underground
and Immersed Tunnel are described.
Chapter 3 traces the history of the SFT, starting from its first proposal
made in 1969 for the Messina Strait crossing, describing all the feasibility
studies and preliminary designs developed all over the world in the following
years. This Chapter is concluded by a description of the Sino-Italian
cooperation programmes, involving among the other partners the University
of Naples “Federico II”, which led to a feasibility study relative to the
crossing of the Jintang Strait (P.R. of China) with a SFT and to the complete
design of the first SFT full-scale prototype, planned to be realized in the
forthcoming years in the Qiandao Lake (P.R. of China). A potential SFT
crossing in the Pulau Seribu Archipelago (Indonesia), preliminary studied in
the last years by the research team headed by Prof. Mazzolani, is also briefly
illustrated.
Chapter 4 explains in the detail of the various aspects faced in the design of
the Archimedes Bridge prototype. The features of the selected location and the
structural scheme are illustrated. The structural analyses aimed at
investigating the prototype behaviour under the environmental loads are
discussed. The conception and the design of the constructional details are
presented. Finally, the fabrication and erection procedures are briefly
described.
Chapter 5 provides a description of the structural models which can be used
to analyse the SFT structural behaviour: the beam on elastic foundation, which
2 Outline of the Thesis
can be used in the preliminary phase of the design, and a SFT Finite Element
Model.
Chapters 6 and 7 are devoted to the study of the response of the SFT to the
main environmental loads to which is subjected: the hydrodynamic actions
due to the presence of waves and currents and the earthquakes. Numerical
analyses are carried out with the Finite Element analyses aimed at the
understanding of the SFT structural behaviour and at the definition of the
optimal structural configurations.
In Chapter 8 potential SFT solutions developed for the Messina Strait and
Gibraltar Strait crossings are illustrated and a technical-economical
comparison with the Suspension Bridges designed for the same locations is
made.
Chapter 8 describes a simple procedure for a quick comparison of the SFT
and CSIB solutions with the Cable Supported Bridges one, providing useful
curves highlighting the conditions under which the former ones are more
competitive than the latter ones.
Finally, in Chapter 9 the future steps and challenges to be faced in the
development of Submerged Floating Tunnel are presented. An alternative
typology of floating tunnel is introduced too: the Cable Supported Immersed
Inversed Bridge (CSIB), which is conceived as a combination of the
submerged floating bridge concept with the cable system configurations and
features several advantages also with respect to the “traditional” SFT solution
Ricerche nella cripta della Basilica Cattedrale di Sant'Agapito Martire a Palestrina
No full textIl contributo descrive le attività di documentazione archeologica e di indagine preliminare effettuate nel corso del 2014-2015 all'interno della cripta della Cattedrale di Sant'Agapito Martire a Palestrin
Personal Influence nella storia del Bureau
No full textThe volume in which the paper is contained proposes a series of reflections on the contributions of Elihu Katz to communication studies, reconstructing the history and highlighting the modernitiy of his thought The paper proposes an historiographical analysis of the famous book Personal Influence and theories contained in it. In the paper it is argued that the approach to the influence process developed by Katz and Lazarsfeld in Personal Influence (the so-called theory of the limited effects) is part of a broader program of research: the empirical study of the action. This is the main reason why this approach has established itself at the Bureau of applied social research (The research center directed by Merton and Lazarsfeld and the heart of the sociological school of Columbia), to the detriment of other theories about mass media communication
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