Higher Institute on Territorial Systems for Innovation
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A Collaborative Method for GNSS-based Inter-Agent Range Estimation and Hybrid Positioning Algorithm in Harsh Environment
No full textHarsh environment is the main impediment to GNSS service availability due to the obstruction of line-of-sight between the satellites and the receiver. A well-known countermeasure to this issue is the exploitation of additional measurements integrated with the GNSS solution, addressed to assure the continuity of service or to improve the positioning performance. Modern communication networks (i.e. 5G/LTE or VANET) provide limited delays allowing a quasi-real-time data transfers suitable for positioning applications. This work relies on such a kind of low-latency communication network, to cooperatively extract the pseudo-distance between pairs of agents equipped with Global Navigation Satellite Systems receivers, thus adapting the positioning algorithm to exploit the additional navigation data. The simultaneous observation of shared satellites allows to estimate the Non-Line-Of-Sight Inter-Agent Range and pseudo-Inter-Agent Range. This is pursued with the aim to guarantee a continuous position availability to the subset of receivers that are experiencing a GNSS positioning failure due to the limited visibility of the constellation, as it may happen in urban scenarios. In this context, the effectiveness of the hybrid cooperative positioning, smoothed with a properly designed Kalman Filter, is verified
An Innovative Cloud-based Supervision System for the Integration of RPAS in Urban Environments
No full textThis paper proposes the outline of a Cloud-based supervision system for Remotely Piloted Aircraft Systems (RPAS), which are operating in urban environments. The novelty of this proposed concept is dual: (i) a Cloud-based supervision system focusing on safety and robustness, (ii) the definition of technical requirements allowing the RPAS to fly over urban areas, as a possible evolution of drone use in future smart cities. A new concept for the regulatory issues is also proposed, compared with existing worldwide regulations. The Cloud framework is intended to be an automated system for path planning and control of RPAS flying under its coverage, and not limited to conventional remote control as if supervised by a human pilot. Future works will be based on the experimental validation of the proposed concept in an urban area of Turin (Italy)
MBSE approach to support and formalize mission alternatives generation and selection processes for hypersonic and suborbital transportation systems
Get PDFThis paper deals with the application of a Model Based Systems Engineering (MBSE) approach to support and formalize mission alternatives generation and selection processes aimed at developing operative hypersonic and suborbital transportation systems. Due to the high-level of complexity of these ultimate aerospace initiatives, a MBSE approach demonstrates to be very effective to allow reduction of risk of inconsistencies, of unappropriated or incompatible design choices, reducing the overall time and effort spent in design and development phases. After a brief introductory section aimed at providing some details about these kinds of vehicles, both in terms of enabling technologies and missions, a step-by-step innovative methodology based on a MBSE approach to carry out mission analysis is proposed. All along the methodology description, the application to a specific reference case study of a suborbital single-stage vehicle aimed at performing commercial parabolic flight services is proposed. Eventually, the selected mission baseline is detailed and the major benefits and further application of this innovative integrated methodology are reported and discussed
Location and real estate values: a study for the segmentation of the Microzones of Turin
Get PDFThe city of Turin is segmented in 40 cadastral Microzones, approved by the City Council in June 1999, which are set up as independent segments of the real estate market. Eighteen years have passed since the approval of the division of the city into homogeneous spatial segments, a period of time in which the pattern of the city has changed, both on the level of urban planning and due to the important changes in the real estate market, most notably the economic-financial crisis which has led to a steady decrease of prices from 2010 to date. Over the past few years, prior to upgrading the Microzones, the Turin Real Estate Market Observatory (TREMO) conducted a series of studies including the segmentation of the Microzones in Historical Territorial Units (HTU), identified on the basis of a historical-urban analysis of the area without questioning the boundaries of the Microzones. The purpose of this article is to illustrate the HTUs and to examine the contribution that a territorial unit smaller than the Microzone can give to the explanation of property prices, taking into account that when decreasing the territorial extension, one has to manage even less representative data samples. In order to study the explanatory capacity of the positional variable, together with a series of variables related to the features of the apartments and buildings in the price determination process, a hedonic model was applied by using a sample of housing units offered on the market during the four-year period 2013-2016. In particular, starting from the territorial segmentation of the Microzones in the HTUs, a traditional hedonic model was applied: in the first application, the Microzone positional variable was assumed, whereas in the second, the HTUs were adopted. Both applications generated significant results, with a high coefficient of determination (Adjusted R2) and an excellent explanatory capacity of the variables considered. The importance of the "location", taken into consideration through the Microzones or through the HTUs, is historically recognized even at an international level and continues to be one of the most important features in the listing price determination process, even during the crisis period of the real estate market
The Retrace Holistic Diagnosis
Get PDFThis part illustrates the role of Systemic Design as a tool for performing the Holistic Diagnosis in the context of each partner of Retrace's European project, achieving results that will allow to develop policy roadmaps
Fantasia e realtà: l'Internet delle cose serve?
No full textVengono esaminate le problematiche della sicurezza dei sistemi informativi relativi all'Internet delle cose
Characterization of 3-strap antennas in ASDEX Upgrade
Get PDFThe response of the local RF current measured at limiters of 3-strap ICRF antenna to variations of power balance and phasing at fICRF=30MHz agrees qualitatively well with EM calculations by TOPICA and RAPLICASOL codes. Measurements of tungsten sputtering yield and DC current at the limiters correlate strongly with the local RF current. In contrast to findings for the 2-strap antennas, values of DC current are predominantly positive, and negative only for some locations and feeding parameters. Explanations can involve more physical mechanisms than only parallel sheath dynamics
Comparison of multi-mode dynamics in single section quantum well and quantum dot lasers
No full textWe numerically study the effect of carrier grating originated by standing wave pattern on the multi-mode dynamics of semiconductor lasers toward the generation of optical frequency combs. The numerical analysis shows that, due to the localization of the carriers in the quantum dot (QD) active region, the carrier grating guarantees the simultaneous lasing of several optical lines with low mode partition noise, whereas this behavior is not observed in quantum well (QW) lasers because of the carrier diffusion in the active layer
Architectural design and planning talk to each other: a dialogue via Strategic Choice Approach (SCA)
No full textThe paper proposes the use of the Strategic Choice Approach as a way of structuring the architectural design process, partly individually and partly supported by meetings and interviews with DMs, experts, and stakeholders. SCA is employed as a graphic and a designing tool to provide alternative transformation scenarios. We reflect on the possible use of SCA to determine prescriptive conditions on physical form at a scale that is still intermediate between the single building and the urban tissue. In this sense, planning and architectural design talk to each other via SCA. It still represents a way of approaching the challenge of planning in an uncertain world, but moreover it produces an architectural project or transformation. SCA can work in a physical sense, not only eliciting guidelines and strategies. This proposal shows an application to a real-world problem, currently under debate by the City of Turin (Italy), the re-use of abandoned barracks located in a prestigious residential area
