Building envelope design as a contribution for improvement of urban spaces and social housing environmental quality

The design of building envelope and the definition of its elements, can influence both the quality of the external spaces perception and the living standard referred to internal building spaces. This improvement depends by the planning of some component design. Particularly, solar shadings and integrated plant solutions, also thanks to an increasing consequential interest about the issue and the legislative and normative evolution, represent factors able to be involved both in the performance and morphological quality of building envelope (improvement of energy efficiency and living quality of internal spaces), which can influence the perception of environment. A study about this questions has been conducted through the elaboration of a system of Best Pratices, a Code of Practice, for the new Plans of Zone of Rome Municipality. The indications contained in the Code takes in examination the integration-mitigation and facilities connection of solar collectors in the building design, and the possibility of integration between solar shading and collector elements, customized like a support tool for the sustainable design of building envelope. The design of building envelope, reported to morphological and technological issues, can assume particular importance in the definition of living quality. Design of closures, developed through some indications referred to its technological components, can influence both the quality perception of external living spaces through the morphological definition of building, and the life quality of internal spaces by the implementation of energy efficiency of building system. Solar shading in particular, also thanks to the increasing consequential interest in the evolution of legislation about the argument, more in the future will represent a fundamental element for design and the increment of performance and morphological quality of building enclosure

Tensorial characterization and quantum estimation of weakly entangled qubits

In the case of two qubits, standard entanglement monotones like the linear entropy fail to provide an efficient quantum estimation in the regime of weak entanglement. In this paper, a more efficient entanglement estimation, by means of a novel class of entanglement monotones, is proposed. Following an approach based on the geometric formulation of quantum mechanics, these entanglement monotones are defined by inner products on invariant tensor fields on bipartite qubit orbits of the group SU(2)xSU(2).Comment: 23 pages, 3 figure

Complex delay dynamics on railway networks: from universal laws to realistic modelling

Railways are a key infrastructure for any modern country. The reliability and resilience of this peculiar transportation system may be challenged by different shocks such as disruptions, strikes and adverse weather conditions. These events compromise the correct functioning of the system and trigger the spreading of delays into the railway network on a daily basis. Despite their importance, a general theoretical understanding of the underlying causes of these disruptions is still lacking. In this work, we analyse the Italian and German railway networks by leveraging on the train schedules and actual delay data retrieved during the year 2015. We use {these} data to infer simple statistical laws ruling the emergence of localized delays in different areas of the network and we model the spreading of these delays throughout the network by exploiting a framework inspired by epidemic spreading models. Our model offers a fast and easy tool for the preliminary assessment of the {effectiveness of} traffic handling policies, and of the railway {network} criticalities.Comment: 32 pages (with appendix), 28 Figures (with appendix), 2 Table