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The FICEP Infrastructure - How we deployed the Italian eIDAS Node in the cloud
No full textThe EU Regulation No. 910/2014 imposes to each EU Member State to notify its electronic identification scheme and to recognize the ones notified by other Member States by 29 September 2018. In this process, Italy will notify SPID, an authentication scheme that allows citizens and business entities to access online services provided by the public administration and private bodies with a unique set of credentials. Technological and operational aspects related to the infrastructure that will allow the SPID notification represent the core business of the FICEP project. This paper offers an overview of the architectural and technological aspects that made possible the deployment of the FICEP architecture in the cloud
Land take effects on airborne fluxes. A proposal for future research development
No full textPurpose - Among others, the resuspension of fine and ultrafine particulate matters (PMs) on air due by land take effect is an uncovered issue. The relation between land use change and fluxes of PM is not systematically observed even if the common classification of ecosystem services (ESs) clearly shows relationship between soil and aerosol concentrations. Soil does not act only as carbon pool, but it is also a crucial variable for the resuspension dynamic of particulates. If key policies of sustainable urban development is focused on "quality of life," it is necessary to map and evaluate the effect of land take on airborne fluxes in metropolitan areas. The paper aims to discuss these issues. Design/methodology/approach - The paper allows to introduce pioneer studies on air quality in large urban areas outling a methodology of particulate field measurement. It introduces newer quantitative/qualitative assessment of environmental effect due to urbanization ensuring a major efficiency on ES degradation. Findings - Expected results are the estimation of resuspension dynamics of aerosol for typical land cover pattern. Research limitations/implications - Implications are mainly destinated to increase significant knowledge and general awareness of the environmental effect caused by urban growth: urban areas act as a hotspot for health risk as both particle sources and human population are concentrated in these areas. Originality/value - Considering that cardiovascular diseases are significantly caused by air quality, the paper aims to support sustainable planning policies aimed to achieve a better quality of environment on urban areas
Missions, Architectures and Technologies for a Lunar Space Tug in Support of Cislunar Infrastructures
No full textCuriosity and discovery are vital elements for the future of human space exploration. Starting from past and present experiences in human and robotic exploration, the global community is working on preparing humans to push themselves beyond known boundaries, i.e. the Low Earth Orbit environment, to reach, explore and, eventually, colonize the Mars surface. This goal requires capability evolution and technology investments. The pathway to Mars includes multiple destinations. The Moon and its vicinity seem to represent the most promising intermediate step to fill the technology gap. The Lunar Space Tug represents one of the possible key elements to sustain the growth and the operability of the future Space Station orbiting in Cislunar space, thanks to its reusability and the adoption of electric propulsion. It can transfer unmanned modules from Low Earth Orbit up to the Cislunar Space Station and back, to provide the required replenishment. Among all Lunar Space Tug mission phases, autonomous rendezvous and mating maneuvers represent one of the most critical one from the point of view of the technology involved in the Lunar Space Tug design. The strong environmental impact must be considered to define the optimal rendezvous approach, especially when the maneuver must be performed in different environments as in this case, i.e. Near Earth Orbit and Cislunar. For the rendezvous maneuver, it is crucial to estimate environmental disturbances that can jeopardize the system as well as the maneuver success. To be compliant with the strict safety requirements that characterize this maneuver, a robust control can guarantee the constraints satisfaction, even when persistent disturbances are acting on the system. In this paper, a Linear-Quadratic Model Predictive Control has been adopted to control the Lunar Space Tug during the last phase of the rendezvous maneuver, showing the robustness behavior of this approach in the presence of reduced persistent disturbances and the compliance of the controller with the real-time application. Once the Lunar Space Tug design is defined through a multi-purpose systems engineering tool, the 6 degrees-of- freedom Lunar Space Tug simulator is used to analyze in deep the rendezvous maneuver. The optimal maneuver design is obtained according to the Attitude and Orbit Control Subsystem architecture and the Thrust Management Function adopted for the determination of the proper control actuators selection and command duration, to realize the control action required. Main results on the Lunar Space Tug design and related performance during proximity operations in both Near Earth Orbit and Cislunar environments are discussed and main conclusions are drawn
Electrical vehicles - practical solutions for power traction drive systems
No full textThis paper presents various solutions for the power traction motors of electrical vehicles. Equivalent designs to those commercially available on the roads are investigated. Potential simple modifications of the winding configurations and cooling system are studied: (a) flat wire (hairpin) winding vs stranded round wire, (b) material grades effect - copper vs aluminum, (c) cooling systems - water jacket vs spray, fluid properties and flow rate
The role of complexity in random element removal in statically indeterminate structures
No full textModern requirements on constructions impose that proper design strategies must be adopted in order to obtain a robust structure: in this sense, consequence-based design focuses the attention on the structural response to damage. The behavior of statically indeterminate structural systems under damage is non-linear because the load paths intertwine each other, even if each component behaves linearly. As much as the structural complexity increases, the presence of effective ways of carrying the load becomes crucial for the robustness of the struc- tural system under a damage process acting at random on the structure. In addition, the size of the system plays an important role: although tendentially more fragile, large systems are able to redistribute and absorb the effects of damage even with low complexity. The theoretical considerations are applied to a real case: a statically indeterminate truss structure is presented and randomly damaged. The results are discussed and the possibility of using the normalized structural complexity index as a potential metrics for testing the efficacy of alternate load path strategy in structural design is critically debated
