Novedrate, Italy
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Grilli A.,University of San Marino | Graziani A.,Marche Polytechnic University | Bocci E.,eCampus University | Bocci M.,Marche Polytechnic University
Materials and Structures/Materiaux et Constructions | Year: 2016

Volumetric characteristics significantly influence the mechanical performance and the durability of bituminous mixtures. Indeed, they are important parameters to be considered in both mix design and quality control phases. Nowadays, among compaction methods, the gyratory compactor (GC) is worldwide used for bituminous mixtures. Even if there is not a universally accepted compaction procedure for cold recycling, numerous universities and road administration agencies have employed the GC especially for bituminous emulsion treated materials. However, the presence of recycled aggregate, cement, bituminous emulsion and water requires adapting the traditional volumetric parameters to these recycled materials. This paper describes the volumetric characteristics of cold recycled mixtures based on the traditional principles used for hot bituminous mixtures. In particular, the compactability and the influence of water content on a mixture containing 50 % of reclaimed asphalt stabilized with 3 % of emulsion and 2 % of cement were investigated. Moreover, closed and slotted moulds were used to study in depth the saturation process. Results showed that specimens compacted in a closed mould, at high water contents, have a bi-linear evolution of the voids content, which defines two compaction phases. In addition, laboratory compaction using a closed mould seems to simulate better the full-scale compaction procedure. Finally, the water content that allowed the saturation state to be reached at the end of the compaction process corresponded to the optimum water content of the mixture. © 2016 RILEM

Cattoni E.,eCampus University | Tamagnini C.,University of Perugia
Acta Geotechnica | Year: 2015

The paper presents some results from a number of dynamic FE simulations carried out to investigate the seismic response of a propped flexible retaining wall in a dry coarse-grained soil, considering two bedrock acceleration time histories as seismic input. Two different soil plasticity models have been considered in this study: an anisotropic hardening, critical-state model for cyclic/dynamic loading of sands and the classical Mohr–Coulomb elastic-perfectly plastic model with nonassociative flow rule. The results obtained allow to highlight the main features of the seismic performance of such type of flexible retaining structures and to evaluate the effects of the constitutive assumptions made on soil behavior on the predicted wall displacements and structural loads. © 2015 Springer-Verlag Berlin Heidelberg

Lopizzo N.,IRCCS Fatebenefratelli San Giovanni di Dio | Chiavetto L.B.,IRCCS Fatebenefratelli San Giovanni di Dio | Chiavetto L.B.,eCampus University | Cattane N.,IRCCS Fatebenefratelli San Giovanni di Dio | And 6 more authors.
Frontiers in Psychiatry | Year: 2015

Major depressive disorder (MDD) is a multifactorial and polygenic disorder, where multiple and partially overlapping sets of susceptibility genes interact each other and with the environment, predisposing individuals to the development of the illness. Thus, MDD results from a complex interplay of vulnerability genes and environmental factors that act cumulatively throughout individual's lifetime. Among these environmental factors, stressful life experiences, especially those occurring early in life, have been suggested to exert a crucial impact on brain development, leading to permanent functional changes that may contribute to lifelong risk for mental health outcomes. In this review, we will discuss how genetic variants (polymorphisms, SNPs) within genes operating in neurobiological systems that mediate stress response and synaptic plasticity, can impact, by themselves, the vulnerability risk for MDD; we will also consider how this MDD risk can be further modulated when gene × environment interaction is taken into account. Finally, we will discuss the role of epigenetic mechanisms, and in particular of DNA methylation and miRNAs expression changes, in mediating the effect of the stress on the vulnerability risk to develop MDD. Taken together, we aim to underlie the role of genetic and epigenetic processes involved in stress- and neuroplasticity-related biological systems on the development of MDD after exposure to early life stress, thereby building the basis for future research and clinical interventions. © 2015 Lopizzo, Bocchio Chiavetto, Cattane, Plazzotta, Tarazi, Pariante, Riva and Cattaneo.

Depaoli P.,LUISS University | Za S.,LUISS University | Za S.,eCampus University
Lecture Notes in Business Information Processing | Year: 2016

This conceptual paper considers the cooperative enterprise model in the light of how it can be affected by the digital world and-at the same time-of how it can positively affect both the Internet and its users. The aim of the paper is therefore twofold: (i) to consider the extent and the way in which cooperative principles are going to be affected by the transition of these firms towards ‘digital materiality’ [1]; (ii) to outline the potential implications of a diffusion of cooperative forms to Internet organizations and users. Based on the traits of this enterprise model, an emerging perspective is described whereby the ‘cooperative’ (especially if considered as a ‘service system’) has an interesting potential both as a competent actor in the domain of virtual enterprises and as a possible driver for safeguarding Internet users. © Springer International Publishing Switzerland 2016.

Bocci E.,eCampus University | Cerni G.,University of Perugia | Colagrande S.,University of L'Aquila
RILEM Bookseries | Year: 2016

Recycling of waste materials is actually one of the main targets in civil engineering, because of economic and environmental features. To this aim, the field of road engineering offers many technical solutions, including the use of recycled materials from construction and demolition of civil works (C&D) in pavement layers. These materials have been investigated to be used as aggregate in asphalt concrete base layers for flexible road pavements. Different percentages (0, 15, 30 and 50 %) of C&D materials were used in order to determine the most suitable solution. The scope was to evaluate both static and dynamic mechanical properties of the mixtures. In particular, a servo-hydraulic control static press was used to run indirect tensile tests and a Nottingham Asphalt Tester was used to determine indirect tensile stiffness modulus and fatigue strength. Specimens were manufactured by mixing the aggregate with 5% of bitumen and compacted with a shear gyratory compactor to a fixed height, in order to have a constant air voids content equal to 5%. Experimental results showed that C&D materials can conveniently be used in asphalt concrete for base layers (up to maximum 30 %) without penalizing the mechanical performance of the mixture. © RILEM 2016.

Bonomi S.,eCampus University | Moggi S.,University of Verona | Ricciardi F.,University of Verona
Lecture Notes in Business Information Processing | Year: 2016

Service oriented perspectives represent an opportunity of innovation and an answer to current challenges for social welfare, sustainable development and everyday life. The prevention of food waste requires new networked and collaborating competences, in the light of the increasing inefficiencies of modern economic growth models and the improvement of new paradigms for sustainable development. This research presents the case of a project that, while addressing food waste at the level of several organizations throughout the supply chain, implemented a recovering process to reduce food impairment. The project (R.e.b.u.s.) applies the efficiency system originally developed for school and university canteens to other food donors. In order to support this project, a farreaching educational program for sustainable development was started in schools, universities and through public events. By educating the local community and enhancing processes that drive a change in behaviour, this initiative proved essential for the successful prevention of food waste. © Springer International Publishing Switzerland 2016.

Palmieri G.,eCampus University | Callegari M.,Marche Polytechnic University | Carbonari L.,Marche Polytechnic University | Palpacelli M.C.,Marche Polytechnic University
Meccanica | Year: 2015

The article describes the mechanical design and testing of a miniaturized spherical parallel manipulator, conceived to handle the orientation of a mobile platform during the assembly of very small components. The kinematic synthesis of the device has been driven by the cooperative tasks to be performed, aiming at enlarging the orientation workspace while still keeping good static performances and a high positioning accuracy. The preliminary experimental tests carried out on the first prototype of the manipulator are presented in the paper. The perspective is to contribute to the realization of general automatic production systems at the moment absent for objects of these dimensions. © 2015, Springer Science+Business Media Dordrecht.

Pecori R.,ECAMPUS University | Pecori R.,University of Parma
2015 7th International Conference on New Technologies, Mobility and Security - Proceedings of NTMS 2015 Conference and Workshops | Year: 2015

An important and common prerequisite of many asymmetric cryptography systems is the availability of a secure mechanism for exchanging or distributing public keys. In this paper we compare two adaptive trust-based distributed schemes to deliver public keys in a peer-to-peer network. In such a scenario, centralized solutions, for example based on a certification authority or a public key infrastructure, cannot be used. For this reason we considered a completely distributed approach creating a sort of context aware web-of-trust. This is achieved in two different trust-based manners: one considering a classic request-response scheme and another one that exploits a Distributed Hash Table (DHT). We compare performances of both solutions trying to find an optimum trade-off. © 2015 IEEE.

Pecori R.,ECAMPUS University | Pecori R.,University of Parma
2015 7th International Conference on New Technologies, Mobility and Security - Proceedings of NTMS 2015 Conference and Workshops | Year: 2015

Coping with multiple false identities, also known as a Sybil attack, is one of the main challenges in securing structured peer-to-peer networks. Poisoning routing tables through these identities may make the process for storing and retrieving resources within a DHT (Distributed Hash Table) extremely difficult and time consuming. We investigate current possible countermeasures and propose a novel adaptive method for making the storage and retrieval process, in a Kademlia-based network, more secure. This is done through the use of a trust-based storage algorithm, exploiting reputation techniques. Our solution shows promising results in thwarting a Sybil attack in a Kademlia network, also in comparison with similar methods. © 2015 IEEE.

This article analyses the role of organizations’ ideological affiliation in shaping information networks within civil society and in granting access to the political sphere. It investigates whether the Catholic and Leftist affiliation of organizations impacts in the city of Turin (Italy) and Kielce (Poland). Applying different social network analysis techniques, the article finds that in both cities there is a tendency towards preferring similar partners. However, while the influence of affiliation is relevant to predict the access to policy making in Turin, in Kielce, this influence is mediated by the actor’s centrality in the social sphere. In both cities, networks are characterized by the higher centrality of Catholic organizations, which also translate in a greater involvement in the political sphere. Twenty-five years after the end of the cold war, past-affiliation is still a strong predictor of political involvement and impacts on the shape of local governance structure. © 2016 International Society for Third-Sector Research and The Johns Hopkins University

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