104 research outputs found
Immigrazione e territorio in Abruzzo/Immigration and territory in the Abruzzo region
No full textIl saggio, dopo una breve introduzione che richiama il tema della presenza straniera in Italia, affronta il caso dell’Abruzzo che è passato recentemente da terra di emigranti a regione di immigrazione. Inserito nel contesto geografico centro-orientale della penisola, il fenomeno migratorio rientra qui nel modello d’insediamento a prevalenza balcanica. I primi due gruppi nazionali, albanesi e macedoni, sono concentrati in gran parte nelle aree montane interne e occupati nel settore della pastorizia. Vi è poi una significativa incidenza dei nordafricani e una consistente comunità di senegalesi, dediti soprattutto al commercio ambulante e distribuiti principalmente sul litorale adriatico. Il mondo del lavoro, le necessità abitative, la distribuzione territoriale delle presenze, le dinamiche dell’illegalità e dell’integrazione, il ruolo della società civile e delle istituzioni segnalano l’esistenza di processi trasformativi in una regione in cui un’immigrazione mediamente giovane, ancora quantitativamente modesta e a carattere prevalentemente familiare, tende a divenire sempre più stabile e numerosa.After a brief introduction referring to foreign presence in Italy, this essay deals with the case of Abruzzo, which has recently moved from being a land of migration to a land of immigration. Placed in the central-eastern geographical context of the Italian peninsula, the migration phenomenon is here prevalently of Balkan character. The two prevalent ethnic groups, Albanians and Macedonians, concentrate mainly in the mountain area of the interior and their main activity is as shepherds. There is also a noticeable presence of Northern Africans and a numerous community of Senegalese, mainly engaged in itinerant trade and mainly settled along the Adriatic coast. The world of labour, their needs of habitation, their distribution over the territory, their position respect to illegality and integration, the role of civil society and institutions show the presence of transformation processes in a region in which immigration of a young population on average, still quantitatively moderate and of mainly family character, tends to become increasingly stable and numerous
Sensore di assetto per nano e micro satelliti
No full textQuesto progetto mira a unire diverse competenze per studiare, analizzare e progettare un sensore di assetto autonomo, a basso costo, e di dimensioni ridotte, utile ad essere impiegato in piccole missioni. Le competenze utilizzate riguardano i sensori stellari (detti anche ‘star trackers’), i sensori inerziali basati su componenti MEMS, e la progettazione di sistemi digitali basati su microcontrollori a 32 bits.Ensure development of Attitude and Orbital Control Systems (AOCS). The action involves three different research fields: star tracker (CCD and APS technologies), IMU (gyroscope and accelerometer MEMS technology) and microprocessor for managing as both “single sensor” and combined operation mode
Understanding the effects of tunneling on buildings by analyzing DInSAR data: The case of the new subway in Rome, Italy
No full textMonitoring the displacements of the buildings during the execution of underground works is a very demanding activity in large urban areas contexts, due to the number of structures involved and to the duration of the measurements throughout the realization time. Therefore, the surface deformation detection cannot be based on direct measurements using ground-based sensors, only, and should include technologies that allow a systematic and comprehensive monitoring. The satellite DInSAR technique (Differential Interferometry Synthetic Aperture Radar) provides displacement time series of a large number of measuring points, which can be associated with different portions of a building and are able to reveal differential settlements. Furthermore, the availability of SAR data archived since 1992 allows performing back analyses to evaluate also long-term settlement processes not directly linked to the tunneling works. More recently, the COSMO-SkyMed constellation, developed by the Italian Space Agency (ASI), has provided data at higher space/time resolution, which have been profitably used to detect and follow the evolution of the settlements caused by tunneling excavation works, as in the case of the new metro line in Rome. By applying the advanced DInSAR methodology, we have estimated average rates of displacement for a number of buildings over the Metro C track interested by the subsidence, very likely triggered by tunneling. A classification-based approach was applied by taking into account the displacement rates and the associated statistical error parameters. This provided a tool for the direct identification of the most critical buildings that need further investigations
Search for Neutral MSSM Higgs bosons decaying to tau pairs in the ATLAS experiment
No full textThe Minimal Supersymmetric Standard Model (MSSM) is a supersymmetric extension of the Standard Model of particle physics, predicting the existence of five Higgs bosons, two charged (H±) and three neutral (h, H, A). At tree level their properties are determined by two independent parameters: the mass of the CP-odd Higgs boson mA, and the ratio between the vacuum expectation values of the two Higgs doublets predicted tan(beta). In Supersymmetric models, the Higgs boson couplings to down-type fermions like b-quarks or tau leptons is significantly enhanced over a large region of the parameter space. Decays to tau lepton pairs occur 10% of the times and provide a cleaner environment for the search than decays to b-quarks. The tau lepton can decay into either a muon or an electron, plus neutrinos, or in hadrons plus neutrinos. In this poster, the search for the heavy neutral MSSM Higgses (h, H, A) is presented, where the final state is a pair of hadronically decaying tau leptons. This channel provides good sensitivity to discovery in the hypothesis of high mass signal. Signal events have to be separated from the background which is dominated by di-jet events from strong interaction processes, Drell-Yan events and W+jets. The event selection is optimized in two independent categories providing their best sensitivities in different mass regions
Performance of the Reconstruction and Identification of Hadronic Tau Decays in the ATLAS Experiment
No full textTau leptons play an important role in the physics program of the ATLAS experiment at the LHC. Identification of hadronically decaying taus is achieved by using multi-variate discriminants exploiting information from tracking and calorimeter detector components. The identification efficiencies are measured in W->tau+nu and Z->tau+tau events selected in data, and compared with the prediction of the Monte Carlo simulation. The energy scale uncertainties for taus are determined by investigating single hadron calorimeter response, as well as kinematic distributions in Z->tau+tau events
BSM Higgs searches in ATLAS
No full textA search for the neutral Higgs bosons predicted by the Minimal Supersymmetric Standard Model (MSSM) is reported. The analysis is performed on data from proton-proton collisions at a centre-of-mass energy of 8\,\TeV collected with the ATLAS detector at the Large Hadron Collider (LHC). The sample was collected in 2012 and corresponds to an integrated luminosity of 19.5-20.3. Higgs bosons decays into oppositely-charged lepton pairs are considered for final states. No significant excess over the expected background is observed, and exclusion limits at the 95\% confidence level are derived for the production cross section of a scalar particle as a function of its mass, and for neutral Higgs boson production in the MSSM as a function of the parameters and
Assessing and improving the measuring capability of the Etna_NETVIS camera network for lava flow rapid mapping
No full textAnalysis of ground deformation using SBAS-DInSAR technique applied to COSMO-SkyMed images, the test case of Roma urban areaSAR Image Analysis, Modeling, and Techniques XII
No full textRECKOn: A real-world, context-aware knowledge-based lab
No full textThe RECKON project focuses on interconnection technologies and context-aware data-analytics techniques to improve safety in workplaces, with the ultimate objective of identifying and preventing dangerous situations before accidents occur. In RECKON, prevention is interpreted through the latest monitoring, diagnostics and prognostics techniques from a safety perspective, allowing to detect and use, even in real time, a large amount of data about the entire operational context. Using sensor networks, we are able to collect information that is used in two ways: (i) when a potentially dangerous situation is detected, the system raises an alarm to prevent an accident, and (ii) whenever an accident or a near-miss (i.e., a potential accident that was narrowly averted) occurs, the related useful information is stored in a case report automatically generated and later used to update the accident-prevention politics. This work briefly describes the operational framework of RECKON, along with its modules and their interaction
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