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Gobbi A.,University of Italian Studies for Foreigners of Perugia
Journal of E-Learning and Knowledge Society

Studies and research about second language acquisition (SLA) and Web 2.0 often regard how 2.0 tools (wikis, blogs, podcasts, etc.) are used to enhance and support language learning. However, little has been said on the theoretical side about how and why this adoption might be successful. This work, therefore, takes a theoretical approach to explaining why Web 2.0 should be adopted as a valid support to SLA, based on analogies between the nature of language and that of the Web and second language learning and software development. I demonstrate how an appropriate integration of Web 2.0 tools in language learning could truly offer a new approach to the whole discipline based on open practices, enriching the learning experience and supporting everyday teaching practice. Source

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Grimaldi S.,University of Tuscia | Grimaldi S.,University of Rome La Sapienza | Grimaldi S.,New York University | Petroselli A.,University of Tuscia | And 2 more authors.
Journal of Hydrology

In this work, a fully-continuous hydrologic-hydraulic modeling framework for flood mapping is introduced and tested. It is characterized by a simulation of a long rainfall time series at sub-daily resolution that feeds a continuous rainfall-runoff model producing a discharge time series that is directly given as an input to a bi-dimensional hydraulic model. The main advantage of the proposed approach is to avoid the use of the design hyetograph and the design hydrograph that constitute the main source of subjective analysis and uncertainty for standard methods. The proposed procedure is optimized for small and ungauged watersheds where empirical models are commonly applied. Results of a simple real case study confirm that this experimental fully-continuous framework may pave the way for the implementation of a less subjective and potentially automated procedure for flood hazard mapping. © 2013 Elsevier B.V.. Source

Nardi F.,University of Italian Studies for Foreigners of Perugia | Biscarini C.,University of Italian Studies for Foreigners of Perugia | Di Francesco S.,Niccolo Cusano University | Manciola P.,University of Perugia | Ubertini L.,University of Rome La Sapienza
Irrigation and Drainage

A large-scale floodplain delineation algorithm is applied to identify potentially inundated areas at the basin scale. The model, which mainly uses a digital elevation model (DEM) and design flood peak discharge at the outlet as input data, is implemented within a geographic information system (GIS). It implements a preliminary GIS-based terrain analysis framework for estimating the stream network, surface flow direction and drainage grids, while the core algorithm implements an automated fluvial cross-section extraction for discharge and flow height estimation. The delineation is then implemented by filtering the floodplain cells as those cells whose elevation is lower than the corresponding channel flow height. The proposed 'hydrogeomorphic floodplain', obtained on the Tiber River basin (approx. 17 000 km2) using the global NASA Shuttle Radar Topography Mission (SRTM) DEM at 90 m resolution, is compared to the official flood maps of the Tiber River Basin Authority to evaluate the model behaviour with respect to standard flood mapping results. The presented case study shows the potential of using an automated GIS algorithm and largely available remotely sensed data for the preliminary identification of the floodplain footprint at the global scale. © 2013 John Wiley & Sons, Ltd. Source

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