1,721,000 research outputs found
La capitale multietnica. Caratteristiche, inserimento lavorativo e bisogni degli immigrati stranieri a Roma
No full textNel presente studio oltre a ripercorrere brevemente le tappe delle inchieste di campo sugli stranieri realizzare nell’area romana (par. 2), ci si sofferma sui diversi aspetti dell’integrazione tentando di fornire elementi utili ad individuare il modello migratorio seguito dalle diverse collettività considerate. Sulla base dei dati di indagini recenti si cerca di tracciare le principali caratteristiche demografiche, sociali e migratorie degli intervistati (par. 3) e, soprattutto, di fornire indicazioni sulla vita quotidiana di alcune collettività immigrate, considerando alcuni aspetti essenziali dell’integrazione sia di tipo “materiale”, come il lavoro (par. 4) e la sistemazione abitativa (par. 5), sia “immateriali”, quali le relazioni sociali e la partecipazione (par. 6)
Landslide risk and monitoring system for conservation of Vardzia monastery, Georgia
No full textThe present paper reports preliminary results of a feasibility project developed in cooperation with National Agency for Cultural Heritage Preservation of Georgia, aimed at envisaging the stability conditions of the slope-forming rocks of the Vardzia Monastery (rupestrian city cave in the south-western Georgia) and finalized to the implementation of a low impact monitoring systems together with long term mitigation/conservation policies. A field analysis was conducted to reconstruct geometry of the rock cliff, characteristics of discontinuities, main failure modes of potential unstable blocks, magnitude of phenomena and geom.-echanical parameters. Instability processes are the result of different combination of causative factors such as: lithology, frequency and orientation of discontinuities versus slope orientation, physical and mechanical characteristics of slope-forming materials, morphological and hydrological dynamics. The adoption of different survey techniques (e.g. 3D laser scanner, Ground Base Radar Interferometry) adopted together could be the best solution in the interdisciplinary field of Cultural Heritage preservation policies. © 2013 Taylor & Francis Group, London
Integration of geophysical investigation to landslide analysis in the archaeological site of Stabiae (Italy)
No full textThe complex of the Roman villas of the ancient Stabiae is located over a morphological terrace near the edge of a steep slope that separates the archaeological site from the urban area of Castellammare di Stabia (Gulf of Naples). The hill is being affected by debris and earth flows that have endangered some ancient structures of the complex. The present work has reconstructed the slope dynamics and causes by means of a geomorphological and geotechnical approach coupled with geophysical investigation. A slope stability modelling, calibrated with landslide historical information and direct survey, has provided main failure mode and magnitude of recent events. Geophysical investigation has permitted to analyse the state of superficial terrains under prominent archaeological structures, providing important information on potential failure surfaces that can be mobilised in the near future in the lack of urgent mitigation measures in the most hazardous sectors of the slope.The complex of the Roman villas of the ancient Stabiae is located over a morphological terrace near the edge of a steep slope that separates the archaeological site from the urban area of Castellammare di Stabia (Gulf of Naples). The hill is being affected by debris and earth flows that have endangered some ancient structures of the complex. The present work has reconstructed the slope dynamics and causes by means of a geomorphological and geotechnical approach coupled with geophysical investigation. A slope stability modelling, calibrated with landslide historical information and direct survey, has provided main failure mode and magnitude of recent events. Geophysical investigation has permitted to analyse the state of superficial terrains under prominent archaeological structures, providing important information on potential failure surfaces that can be mobilised in the near future in the lack of urgent mitigation measures in the most hazardous sectors of the slope
Assessment of the stability conditions of a large-volume sandstone block in the northern sector of the Siq of Petra
No full textThe present paper describes a specific research performed in the framework of the project “Sustainable Monitoring Techniques for Assessing Instability of Slopes in the Siq of Petra, Jordan” carried out by ISPRA from July 2012 to May 2015. Focus is given to the stability conditions of a large-volume sandstone block located in the northern sector of the Siq, isolated from the rear rock-mass by a sub vertical, partially open, fracture and partially eroded at the base in correspondence of a softer sandstone layer. A limit equilibrium analysis for sliding and toppling failure mechanisms was performed in order to investigate the influence of geometrical and strength parameters and to assess the present stability conditions. These latter were also preliminary evaluated with the support of a numerical analysis, in which the influence of the real geometry and of progressive failure can be studied in detail. This knowledge, associated to the data provided by an integrated monitoring system realised with an automatic and wireless connected crack-gauge network, will help in identifying the most sustainable actions to be realised to mitigate the risk of collapse in such a vulnerable and complex context
Geological and geophysical investigation in the North Stelae Park of Aksum (Ethiopia) as contribution for the re-erection of the Roma Stela
No full textMultidisciplinary approach were used in the characterization of archaeological park of Axum. The study was for the return of stelae to Asum
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