1,721,020 research outputs found
Sviluppi evolutivi e manutentivi per l'applicazione DBRR-SIAP - Database rifiuti radioattivi
Full text linkLo scopo del presente documento è quello di presentare lo stato dell'applicazione DBRR-SIAP utilizzata per ottenere delle stime dei volumi finali dei rifiuti condizionati. Nel documento sono descritte le modifiche migliorative ed evolutive apportate per ottimizzare il lavoro dei ricercatori ENEA
Preliminary remarks about rainfall thresholds for triggering debris flows on the Messina area
No full textMessina area (Italy) range stretches along the coast and have high relief energy. Huge rainfall events cause rapid gravitational phenomena classified as debris flows. The rampant urbanization developed in the last decades in the Messina Municipality has determined a fragile territorial settlement, prone to be heavily damaged by debris flows, as in October 2009. In order to support the community in tackling the risk conditions which it is subjected to, it is necessary to develop “non-structural” measures, characterized by a high level of environmental sustainability. The scientific community and the public authorities responsible for land management and involved in the mitigation of the geomorphological risk are paying a specialattention to the development of monitoring and alarm systems able to improve the current civil defence plans. Based on the historical information on rainfall, this study deals with the triggering thresholds of debris flows. The results provide additional elements to the knowledge of the critical rainfall, useful for developing effective early warning systems. . © Springer International Publishing Switzerland 2015
Contribution to the runout evaluation of potential debris flows in Peloritani Mountains (Messina, Italy)
No full textEspecially important for landslide prevention activities is to recognize the potential path of the debris flows from the triggering point to the stop. The huge number of debris flow (over 2000), occurred after 2007 in the Messina Municipality area, has allowed to evaluate the runout of these phenomena in the geographical area of the Peloritani Mountains. A preliminary runout analysis was carried out plotting the mobilized volume by phenomena multiplied the altitude difference (Δha) between the trigger point (Piff) and the stop point (Pip), in abscissa, and the distance travelled by the phenomena from the Piff to Pip, in the ordinate. Subsequently, these approach has been revised to make the applicability to potential phenomena more effective and easier to use. With this aim, was chosen to use the altitude difference (Δhb) between the trigger point (Piff) and the foot of the slope where the movement occurred. Starting from the location and size of the potential triggering areas and from the knowledge of the volume of the potentially mobilized material and basing on these curves, the runout of potential trigger areas has been estimated. . © Springer International Publishing Switzerland 2015
Soil water content and triggering of debris flows in the Messina area (Italy): Preliminary remarks
No full textThe analysis of the triggering thresholds is aimed at answering the question of when an event can take place. Based on the historical information on rainfall—the main triggering factor of this type of landslides—the triggering thresholds of debris flows have been investigated with the aim to provide additional elements to the knowledge of the critical rainfall. Nevertheless, the most directly factor related to the triggering of debris flows is the soil moisture level that depends not only on the intensity of rainfall in a given moment, but also by the thermoprecipitation regime of the previous period. The state of soil saturation was analysed in this study in laboratory with the pressure plate extractors techniques and monitored in field by the FDR probes. The responses of the FDR probes seem to confirm the data modelling, showing in some cases a marked sensitivity to the rainfall input. Coupling rainfall and soil water content data, the study would give a contribution to the development of more effective early warning systems. . © Springer International Publishing Switzerland 2015
Landslides inventory in the Messina municipality area: Integration of historical and field survey data
No full textThrough the recording of historical and recent events data, three different landslides inventory of the Messina town territory have been created. The first collects information about localization and date of historical landslides occurred between the XVI century and 2011. The second collects ground effects induced by the 1908 earthquake registered in numerous technical reports compiled by expert researchers and technicians of that time. The third gathers recent landslides and was carried out through field activities, by reviewing aerial photographs for the years 2007 and 2009 and by analysis of Google satellite images. These three landslides inventories represent a source of specific information, essential for the knowledge and the analysis of the territory. They represent a valid tool not only for experts in the sector but also for everyone who faces the issues linked to the geomorphologic risk assessment. Nevertheless the information on the landslide characteristics constituted the basis for the definition of the landslide susceptibility map and landslides’ trigger rainfall thresholds of the area. . © Springer International Publishing Switzerland 2015
A database of the coseismic effects following the 30 October 2016 Norcia earthquake in Central Italy
No full textWe provide a database of the coseismic geological surface effects following the Mw 6.5 Norcia earthquake that hit central Italy on 30 October 2016. This was one of the strongest seismic events to occur in Europe in the past thirty years, causing complex surface ruptures over an area of >400 km 2. The database originated from the collaboration of several European teams (Open EMERGEO Working Group; about 130 researchers) coordinated by the Istituto Nazionale di Geofisica e Vulcanologia. The observations were collected by performing detailed field surveys in the epicentral region in order to describe the geometry and kinematics of surface faulting, and subsequently of landslides and other secondary coseismic effects. The resulting database consists of homogeneous georeferenced records identifying 7323 observation points, each of which contains 18 numeric and string fields of relevant information. This database will impact future earthquake studies focused on modelling of the seismic processes in active extensional settings, updating probabilistic estimates of slip distribution, and assessing the hazard of surface faulting. © 2018 The Author(s)
Mean-square consistency of the f-truncated M2-periodogram
No full textThe paper deals with the problem of estimating the M2 (i.e. multivariate and multidimensional) spectral density function of a stationary random process or random field. We propose the f-truncated periodogram, i.e. a truncated periodogram where the truncation point is a suitable function f of the sample size. We discuss the asymptotic consistency of the estimator and we provide three concrete problems that can be solved using the proposed approach. Simulation results show the effectiveness of the procedure
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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