Reducing wildland fire hazard exploiting complex network theory. A case study analysis

We discuss a new systematic methodology to mitigate wildland fire hazard by appropriately distributing fuel breaks in space. In particular, motivated by the concept of information flow in complex networks we create a hierarchical allocation of the landscape patches that facilitate the fire propagation based on the Bonacich centrality. Reducing the fuel load in these critical patches results to lower levels of fire hazard. For illustration purposes we apply the proposed strategy to a real case of wildland fire. In particular we focus on the wildland fire that occurred in Spetses Island, Greece in 1990 and burned the one third of the forest. The efficiency of the proposed strategy is compared against the benchmark of random distribution of fuel breaks for a wide range of fuel breaks densities

Complex network statistics to the design of fire breaks for the control of fire spreading

A computational approach for identifying efficient fuel breaks partitions for the containment of fire incidents in forests is proposed. The approach is based on the complex networks statistics, namely the centrality measures and cellular automata modeling. The efficiency of various centrality statistics, such as betweenness, closeness, Bonacich and eigenvalue centrality to select fuel breaks partitions vs. the random-based distribution is demonstrated. Two examples of increasing complexity are considered: (a) an artificial forest of randomly distributed density of vegetation, and (b) a patch from the area of Vesuvio, National Park of Campania, Italy. Both cases assume flat terrain and single type of vegetation. Simulation results over an ensemble of lattice realizations and runs show that the proposed approach appears very promising as it produces statistically significant better outcomes when compared to the random distribution approach

Technical and Vocational Education and Training in Italy: Structure and Changes at National and Regional Level

Even though the institutional framework is strongly centralised, Italy displays important territorial differences in the education system. Historically, such differences are interwoven with territorial differences both in economic and social development. This is the background of our analysis of technical and vocational education and training in Italy. In particular, in Section 1 we shall characterise the national education system; in Section 2 we shall outline the process of reform that has led to the present system of technical and vocational education and the main features of the regional vocational system. Within this framework, we shall present our main thesis – namely, that the system of technical and vocational education is also influenced by action undertaken at local level by the social actors who promote and fuel economic and social development. It is not possible to describe the several territorial specificities which ought to be taken into consideration if one is to speak of Italy as a whole: this because there are no systematic data to enable such analysis to be performed. In this paper, we shall therefore consider only the case of Emilia Romagna (Section 3), which is representative of areas of the Centre North having a highly developed local economy. In this context, we shall concentrate on three points: the role of technical and vocational education in the diffusion of the skills that encouraged the development of small and medium enterprises in the 1950s; the transformations in the last twenty years and, eventually, the process of adjustment of the training system within the changes both in the productive structure and in the composition of the population (age, origin). The last section draws together the threads of our interpretation of the system of technical and vocational education in Italy. Our analysis highlights three goals for a reform of the Italian education system: (1) to revise the meaning of primary literacy; (2); to fuel a social tendency towards technical and vocational education and training; (3) to bridge territorial differences in the education system. The first goal implies an education policy opposing the tendency to limit the possession of knowledge merely to a narrow minority of the population. The second goal considers technical and vocational education an essential element for activating a virtuous circle of growth, starting with a nucleus of knowledge learnt at school that thereafter is diffused and filters down in the tissue of technical and social relations. The last goal in our list calls for policy measures stressing the importance of the interweaving of social and economic sphere and education and training system The attainment of these goals requires sweeping changes involving several fronts of political, economic and social action. With regard to this, we argue that a necessary condition for a convincing start of the process of change is the redistribution of competences between the State and the local authorities. This implies redefining the role of teachers and directors of the individual schools, and the role and competences of the local authorities.Analysis of Education; Education Policy; Regional development policies; Innovation

The Officina Emilia Initiative:Innovative Local Actions to Support Education and Training Systems

The issue of the regeneration of skills, in particular in the light engineering industry, is addressed by Officina Emilia (henceforth OE) as a crucial one in order to re-examine the interweaving of education, innovation and local development in the SMEs production systems. The project, aimed at the education and training systems, is designed to enhance the industrial culture in order to strengthen technical and scientific education. First sponsored in 2000 by the University of Modena & Reggio Emilia (Italy), over the last years OE has gathered the support of local actors dealing with the themes of training, culture, and local development. In 2009 it opened its museolaboratorio (“workshop-museum”) in which teaching activities promote an interest in the themes of work, technologies and the socio-economic development of the territory among the students and teachers of schools of all types and levels. The involvement of class groups, of teachers and other visitors takes place through active learning practices that foster motivation and develop a sense of belonging which is likely to lead to a more profitable educational experience, both secondary and tertiary, as well as to contribute to improving career prospects. Officina Emilia proposes innovative action on a local level, allowing for the implementation of effective teaching practices as well as the broadening and consolidation of best practices which might support a society-wide trend towards maintaining a high demand for a better quality of education and the ability to provide it. Ten years after the beginning of the initiative, with this paper we intend to open up the discussion on the various research issues and on the actions undertaken, focusing on the analytical tools and the main critical areas in the further implementation of the Officina Emilia initiative.Analysis of Education; Education Policy; Regional Development Policies; Innovation

A Plane Wave Virtual Element Method for the Helmholtz Problem

We introduce and analyze a virtual element method (VEM) for the Helmholtz problem with approximating spaces made of products of low order VEM functions and plane waves. We restrict ourselves to the 2D Helmholtz equation with impedance boundary conditions on the whole domain boundary. The main ingredients of the plane wave VEM scheme are: i) a low frequency space made of VEM functions, whose basis functions are not explicitly computed in the element interiors; ii) a proper local projection operator onto the high-frequency space, made of plane waves; iii) an approximate stabilization term. A convergence result for the h-version of the method is proved, and numerical results testing its performance on general polygonal meshes are presented

Wild criticism. Social criticism, emancipation and black comedy

Elsociólogo francés Philippe Corcuff parte de la hipótesis de que el pensamiento contemporáneo viene experimentando una escisión de la crítica social respectode la emancipación. Ante esto y con el objetivo de inspirar la "imaginación sociológica", propone entablar diálogos transfronterizos entre filosofía, sociología y culturas ordinarias. A partir de la metodología de los "juegos delenguaje" se embarca en el análisis del género negro americano caracterizadopor una visión crítica, pesimista y melancólica del mundo. Poniendo en funcionamiento algunas de estas herramientas teóricas y metodológicas desarrolladas por Philippe Corcuff, en este trabajo propongo el análisis de unode los relatos de la película nacional más taquillera de todos los tiempos: el film de comedia negra "Relatos Salvajes" con el fin de que este análisis permita hacer brotar destellos de inteligibilidad que puedan extenderse acuestiones de actualidad social y política. Elrelato sobre Bombita es sumamente jugoso. Se trata de un hombre común y corriente con un trabajo y una familia que se ve entrampado por los poderes operantes en la sociedad dejándolo en la más absoluta soledad. Ante esto, el protagonista diseña una salida. En su registro propio y a partir del ejercicio de diálogos transfronterizos, esta salida nos dona una crítica potente a los procesos de individualización del capitalismo contemporáneo.The French sociologist Philippe Corcuff starts from the hypothesis that contemporary thought is experiencing a separation between social criticism and emancipation. Given this and with the aim of inspiring the "sociological imagination", he proposes to establish cross-border dialogues between philosophy, sociology and ordinary cultures. From the methodology of the "language games" he embarks on the analysis of the American black genre characterized by a critical, pessimistic and melancholic vision of the world. Using some of the theoretical and methodological tools developed by Philippe Corcuff, in this work I propose to analyze one of the stories of the most successful national film of all time: the black comedy film "Relatos Salvajes" in order that this analysis allows to spark flashes of intelligibility that can be extended to issues of social and political actuality. The story about Bombita is extremely juicy. He is a common man with a job and a family that is trapped by the operating powers in society leaving him in the most absolute solitude. Against these, the protagonist designs an exit. In its own register and from the exercise of cross-border dialogues, this output gives us a powerful critique of the processes of individualization of contemporary capitalism.Fil: Russo, Fiorella Paola. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto de Estudios Históricos, Económicos, Sociales e Internacionales. Instituto Multidisciplinario de Estudios Sociales Contemporáneos; Argentin

Quantitative risk assessment on a hydrogen refuelling station

The Directive 2014/94/UE (DAFI, Alternative Fuel Initiative Directive) on the deployment of alternative fuels (i.e. hydrogen) infrastructures has been recently transposed into national law in Italy. Consequently, the technical regulation on fire prevention for H2fuelling stations has been updated, in order to consider the current maximum delivery pressure (700 bar) of gaseous hydrogen for road vehicles. This technical regulation establishes the prescriptive safety distance from a piece of equipment. In the case of a new station, an assessment of the frequency of the event and its potential consequences is necessary. This is to understand which risk can reasonably be mitigated by a safety distance or whether additional mitigation or prevention measures should be taken. This paper presents the quantitative risk assessment (QRA) study on a hydrogen station planned to be installed, study which aims at determining the safety distances. Such study utilizes the Sandia-developed QRA tool, Hydrogen Risk Analysis Model (HyRAM), to calculate risk values when developing risk-equivalent plans. HyRAM combines reduced order deterministic models that characterize hydrogen release and flame behavior with probabilistic risk models to quantify risk values. Thanks to HyRAM tool it is possible to estimate physical effects and consequences on people and structures and plants, related to risk scenarios, by means of a damage model library. Use of risk assessment may allow station owners and designers to flexibly define station-specific mitigations, with the purpose of achieving equal or better levels of safety with respect to prescriptive recommendation levels, as suggested by ISO19880-1 (2018)

Education with micro-robots and innovation in education

Knowledge-driven re-industrialisation in Europe calls for changes in education systems. We address those changes by focusing on the adoption of a context-based approach to place science and technology within young people\u2019s daily lives and to promote their understanding of the relevant issues emerging in society. In particular, we propose the use of micro-robots labs in order to: (i) improve a context-based approach to technology education and (ii) spread the knowledge of working condi-tions, employment opportunities and industrial enterprises activities. We suggest action-research as a feasible practice to boost bottom-up changes in teaching and learning activities, and we focus on the university initiative Officina Emilia as an example. The paper proposes some concluding remarks focusing on hybrid places to foster innovation, involving not only teachers and experts on education, but also researchers in different technological domains and in the social sciences and humanities, manufacturing and services companies, civil society

Effective fire extinguishing systems for lithium-ion battery

Lithium-ion batteries are a popular choice of power source for a variety of energy and power demanding applications for both stationary applications and electromobility. Among electrochemical storage systems, Lithium-ion batteries were found to be promising candidate, due to their high power and high energy density. In order to assemble high power batteries for plug-in hybrid electric vehicles and pure electric vehicles, several hundreds of large-format Lithium-ion cells will be required, and even more cells for power/energy demanding stationary applications. However, safety remains a significant concern, as battery failure leads to ejection of hazardous materials and rapid heat release. The failure of a single cell can generate a large amount of heat which can then initiate, in the worst case, the thermal runaway of neighbouring cells, leading to failure throughout the battery pack. The heat accumulation can also run into the venting of a cell, with the emission of flammable organic solvent inside the battery pack. Battery failure can be initiated via a number of different abuse scenarios, such as overheating, overcharging, puncture/crushing, water immersion, or external short circuit. Development of effective mitigation strategies necessitates a study on battery failure events and a better understanding of important characteristics relating to safety, such as heat release, hazardous materials ejection, and thermal propagation. On the other hand, when a fire event is initiated, proper intervention strategies have to be defined in order to avoid it becoming catastrophic. In this paper are reported the results of thermal abuse tests on single Lithium-ion cells and a battery pack. The tests were performed with the technical equipment and resources of National Fire Corps. Screening tests for battery fire extinguishing agents were also performed. The effectiveness of an agent was evaluated through experiments on the cooling effect of fire extinguishing agents. Among the various agents, water and foam were found to be the most effective