2,160 research outputs found
Ruins of War : The Green Sea and the Mysterious Island
No full textThis chapter provides a semiotic investigation of an emblematic space in Palermo, the Foro Italico. After the Second World War, this space was occupied for many years by the ruins left when the city was bombed. Analysing the diachronic evolution of the Foro Italico, the author examines the semantic categories that have defined the space, exploring how the memory of the war has been concealed and inscribed in the post-war rewritings of the place. The chapter reads this space as 'a mysterious island', caught between nature and culture. Referring to different kinds of texts, Marrone illustrates how the practices of various local and migrant communities contribute not only to the resemantisation of space but also to the production of new memories
Performance of the two aerogel Cherenkov detectors of the JLab Hall A hadron spectrometer Author(s): Marrone S
No full text
Formalizzazione o accumulazione? Digitalizzazione e dipendenza nelle piattaforme di food delivery
No full textThe paper provides a perspective, empirically explorated in the context of food delivery, able to focus those factors which have developed the digitalizazion of the economy, but also why its benefits are not being redistributed among those who have been involved. The hypothesis is that this happens because digitalization is not only the product of technological development, but also of a ri-articulation of accumulation processes happening in the context of neoliberalism effects on the society. A process which is not only increasing the relevance of food delivery, but it is also transforming social relations inside such context. The paper presents empirical evidences coming from the analysis of four of the major food delivery platforms balance sheet. Furthermore, the author will analyze 5 interviews conducted among food delivery workers and 7 among restaurant’s manager. The author finally underlines how digitalization is producing a dependency from digital platforms which gets deepen by the way in which they operate
Model-driven V&V processes for computer based control systems: A unifying perspective
No full textA recent trend in software engineering is to support the development process by providing flexible tool chains allowing for effective Model-Driven approaches. These solutions are very appealing in industrial settings since they enable the creation of development and verification processes, enhancing abstraction and reuse, and hence improving productivity. This paper addresses advantages and challenges in extending Model-Driven approaches to system engineering and specifically to verification and validation (V&V) of critical computer-based systems. Specifically, the paper highlights the needs for real-world industrial contexts and proposes the definition of a unifying Model-Driven process for V&V of functional and non-functional system properties. Some enabling techniques which aim at improving the reuse of Model-Driven artifacts are addressed to deal with process scalability and effectiveness. Two sample applications are described for ERTMS/ETCS signalling system in order to show the advantages of the approach: formal modeling for performance evaluation of message delivery between train and track controllers and test case generation for the verification of functional requirements of trains outdistancing. © 2012 Springer-Verlag.</p
Modelli di progettazione integrata: struttura e flussi delle informazioni di progetto attraverso i modelli BIM
No full textLow-Power Wide-Area Networks in Intelligent Transportation: Review and Opportunities for Smart-Railways
No full textThe aim of this paper is to provide an overview of the state-of-the-art in LPWAN, with a focus on intelligent transportation. IoT and LPWAN technologies appear as very promising for cost-effective remote surveillance, monitoring and control over large geographical areas, by collecting data for several sensing applications (e.g., predictive condition-based maintenance, security early warning and situation awareness, etc.) even in situations where power supply is limited (e.g., solar panels) or absent (e.g., installation on-board freight cars).
R. Dirnfeld, F. Flammini, S. Marrone, R. Nardone and V. Vittorini, "Low-Power Wide-Area Networks in Intelligent Transportation: Review and Opportunities for Smart-Railways," 2020 IEEE 23rd International Conference on Intelligent Transportation Systems (ITSC), 2020, pp. 1-7,
doi: 10.1109/ITSC45102.2020.9294535
Towards Model-Driven V&V assessment of railway control systems
No full textVerification and Validation (V&V) activities aiming at certifying railway controllers are among the most critical and time-consuming in system development life cycle. As such, they would greatly benefit from novel approaches enabling both automation and traceability for assessment purposes. While several formal and Model-Based approaches have been proposed in the scientific literature, some of which are successfully employed in industrial settings, we are still far from an integrated and unified methodology which allows guiding design choices, minimizing the chances of failures/non-compliances, and considerably reducing the overall assessment effort. To address these issues, this paper describes a Model-Driven Engineering approach which is very promising to tackle the aforementioned challenges. In fact, the usage of appropriate Unified Modeling Language profiles featuring system analysis and test case specification capabilities, together with tool chains for model transformations and analysis, seems a viable way to allow end-users to concentrate on high-level holistic models and specification of non-functional requirements (i.e., dependability) and support the automation of the V&V process. We show, through a case study belonging to the railway signalling domain, how the approach is effective in supporting activities like system testing and availability evaluation
Challenging Goliath. Informal Unionism and Digital Platforms in the Food Delivery Sector. The Case of Riders Union Bologna
No full textThe growth of digital platforms in many industries attracted the attention of scholars and activists alike. A number of studies, in disciplines such as management, emphasized the role of digital technology in transforming market logics and described platforms as the harbingers of a more democratic organization of economic activities. The more platforms became relevant in intermediating between clients and providers of services and goods, the more conflicts related to working conditions rose, calling for a critical approach to the so-called platform economy. The most recent debate focused on the connection between the rise of platforms and the effects of neoliberalism in relaxing employment regulations and in pushing an increasing number of individuals towards “gig” types of jobs. We deal with these tensions and consider the emerging forms of organization and strategies of workers’ movements. We focus on the food delivery sector and on the most popular informal workers’ movement in Italy: Riders Union Bologna (Rub). The aim of the paper is to investigate the factors that stimulated the rise of informal unionism in food delivery, and to pinpoint the reasons motivating specific struggling and organizing strategies among platform workers.The growth of digital platforms in many industries attracted the attention of scholars and activists alike. A number of studies, in disciplines such as management, emphasized the role of digital technology in transforming market logics and described platforms as the harbingers of a more democratic organization of economic activities. The more platforms became relevant in intermediating between clients and providers of services and goods, the more conflicts related to working conditions rose, calling for a critical approach to the so-called platform economy. The most recent debate focused on the connection between the rise of platforms and the effects of neoliberalism in relaxing employment regulations and in pushing an increasing number of individuals towards "gig" types of jobs. We deal with these tensions and consider the emerging forms of organization and strategies of workers' movements. We focus on the food delivery sector and on the most popular informal workers' movement in Italy: Riders Union Bologna (Rub). The aim of the paper is to investigate the factors that stimulated the rise of informal unionism in food delivery, and to pinpoint the reasons motivating specific struggling and organizing strategies among platform workers
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