1,110 research outputs found
Abitare Via Anelli: proposta di un cohousing contro l'abbandono urbano
No full textProgetto di riqualificazione urbana in luogo del complesso "Serenissima" di Via Anelli; sviluppo di residenze ad alta complessità spaziale in forma di cohousingope
Valorization of cultural heritage and land take reduction: an urban compensation model for the replacement of unsuitable buildings in an Italian UNESCO site
No full textThe enhancement of historical, artistic and cultural assets is a topic of significant interest in the interna- tional and national context within the policies able to reduce the land take. However, it often happens that the full conservation and enhancement of the cultural heritage site is hindered by recently built buildings that are inconsistent with the valuable characteristics of the surrounding urban environment. Aim of the work is to define and implement an innovative compensation-based model to enable the de- molition and reconstruction of unsuitable buildings that prevent the enhancement of historic city centers. It represents a decision support system for the Public Administration in the determination of the building rights to be transferred to the Private Entrepreneur involved, by ensuring financial convenience, environ- mental purposes and overall positive public effects. The analysis of the results obtained by applying the compensation-based model to the city of Alberobello, a UNESCO Italian heritage site, demonstrates its usefulness, efficiency and flexibility
Spatial decision support systems for effective ex-ante risk evaluation: An innovative model for improving the real estate redevelopment processes
No full textThe real estate redevelopment process is an important route for achieving the sustainable development goals
established worldwide, but at the same time it represents a complex and not very transparent decision-making
issue for the public and private subjects involved. In particular, for the private entrepreneurs it is generally
considered more risky than new construction, therefore it requires a careful evaluation for avoiding losses. Most
of the existent risk assessment tools provide for the analysis at the aggregated scales or require knowledge of
many financial data of the project which are often not yet known in an ex-ante evaluation condition. Aim of the
work is to define a structured framework for creating a Spatial Real Estate Risk Index (ISRR) through a spatial
decision support system based on an innovative model that allows public and private subjects to carry out an
effective ex-ante risk assessment at the sub-municipal territorial scale for public-private partnerships (PPP) risks.
The proposed model adopts the flexibility of the Analytic Hierarchy Process multicriteria technique for managing
qualitative and quantitative real estate data, the capability of indicators system to reduce the complexity of the
real estate risk issues and the sleight of the Geographic Information System to clearly show the spatial distribution
of the real estate risk. The ISRR is a territorial synthetic index that represents the “base risk”, i.e. the risk
level that is expressed by the different features that characterize the demand and supply of the several urban
areas within the city at the time of the evaluation. In order to test the usefulness of the proposed model, the
application to the city of Rome (Italy) is described. The obtained results highlight the immediate ability to
recognize the riskiest urban areas located on the northern and eastern boundaries of the city. The innovative
contribution of the work is mainly represented by the analysis of the real estate risk carried out at the submunicipal
scale by using both quantitative and qualitative real estate data, therefore the proposed structured
framework for creating the ISRR allows to immediately recognize the riskiest and least risky sub-municipal areas
through an adequate risk map
Mid-infrared optical fiber Devices: Challenges, advances and applications
No full textThis review provides an overview on part of the several recent progresses in mid-infrared optical fiber devices, with a focus on enabling technologies and emerging applications. The mid-infrared spectral region is of particular interest due to its strong and selective molecular absorption, which is a key element for high-sensitivity applications such as gas sensing, chemical and biomedical sensing, and environmental monitoring. The paper first outlines the significance of the mid-infrared wavelength window and its application landscape. Then, it reports the state-of-the-art of mid-infrared optical sources, including those based on nonlinear frequency conversion and fiber laser architectures. Special emphasis is then placed on recent developments in fiber-based components that support the fabrication of compact, mechanically robust, and alignment-free, all-fiber mid-infrared systems. In particular, fluoride glass fibers, owing to their broad transmission wavelength range and low phonon energy, have emerged as a practical platform in this area. The review highlights the substantial research efforts devoted to improving the performance, fabrication, and integration of fluoride fiber technologies, which are expected to play a crucial role in the advancement of next-generation mid-infrared photonic systems
Design and fabrication of mid-infrared devices for IoT applications
No full textThe advancement of photonics has transformed the fields of communication and sensing, allowing for outstanding improvements in transmission speed, accuracy, miniaturization, and scalability. This Ph.D. thesis reports the design and fabrication of Mid-InfraRed (Mid-IR) devices tailored for Internet of Things (IoT) applications, focusing on the use of optical fibers based on soft glasses. The research encompasses various optical components, including Bragg gratings inscribed on flat fibers and planar substrates, and optical fiber devices based on stretching and heating fabrication technique such as combiners, couplers, photonic lanterns, long period gratings (LPGs), non-adiabatic tapers, and S-tapers. Additionally, the modelling and design of a Praseodymium-doped laser is explored to enhance Mid-IR light generation.
The initial section of this thesis concentrates on the design, fabrication, and characterization of innovative Bragg gratings. These are wavelength-selective mirrors, essential for the construction of laser cavities. Moreover, they can be used as sensors exploiting the Bragg wavelength shift to measure various physical parameters, such as strain, curvature, and temperature. These results were achieved in collaboration with the University of Southampton (Optoelectronic Research Centre - ORC, UK) and the University of Bristol (School of Civil, Aerospace and Design Engineering, UK).
Considering the increasing interest in the Mid-IR spectral range, the second part of the thesis investigates the design, fabrication, and characterization of Mid-IR optical fiber components based on soft glasses, mainly operating within the wavelength range from λ=0.5 μm to λ=5.5 μm. Optical fiber combiners and couplers are key building blocks in communication and sensing systems, serving for spectral splitting/combining and the increasing of optical power. Photonic lanterns offer an efficient interface between multi-mode and single-mode waveguides, proving beneficial in astrophotonics where “every photon counts”. LPGs and tapers enable sensing capabilities in the Mid-IR, spectral range that allows to identify the typical bonds of many molecules. In collaboration with Le Verre Fluoré (Bruz, France), the development of a specialized manufacturing process for soft glasses permitted the fabrication and characterization of these devices.
Finally, Bragg gratings in combination with some of the developed building blocks allow the fabrication of all-in-fiber Mid-IR amplifiers, and lasers systems. In this context, optical fiber lasers, emitting in the Mid-IR wavelengths, can be employed for novel communication and sensing schemes. Therefore, the design and optimization of a Mid-IR continuous wave (CW) laser based on Praseodymium, is reported in the last part of the Ph.D. research work.
Some of the findings from this research have been published in International Journals and presented at National and International Conferences, as detailed in the list at the end of the thesis
The Financial Feasibility Analysis of Urban Transformation Projects: An Application of a Quick Assessment Model
No full textIn the field of urban planning processes, the territorial redevelopment initiatives are important for the sustainable development of the cities. With reference to a real case study in the city of Pontedera (Italy), the aim of the present work is to highlight the usefulness of the Cost-Volume Profit Analysis (CVPA) as a tool to support the decisions of the public and private operators involved in three urban redevelopment initiatives. Specifically, for each identified transformation plots, two scenarios have been analyzed, by considering for each one all the building rights allowed by the General Regulatory Plan (GRP) of the city, and the requests of public and private subjects involved. The results achieved prove the inadequacy and rigidity of the forecasts of the GRP which, therefore, need to be checked in advance to avoid the expenditure of public money. In this way, the proposed model allows the public subject to correctly calibrate the extent and type of requests to be made to the private entrepreneur, who will be able to verify its own financial balance sheet and its expected amount of revenues and costs. The implemented methodology can be a useful support for the municipal administration in order to favor a quick financial assessment and to activate a negotiation on the building parameters of the different analyzed interventions
Editorial: New frontiers in evaluation, management, and technologies for sustainable cities
No full textUrban planning decisions: an evaluation support model for natural soil surface saving policies and the enhancement of properties in disuse
No full textPurpose: The present research aims to develop and test an evaluation support model for decisions alert soil surface saving to be used in the redevelopment of abandoned and degraded properties through involvement of private developers. Design/methodology/approach: Adapting operations research principles to the public–private partnership features that are typical of urban planning issues, the model pursues a complex objective function, that concerns urban parameters to be attributed to properties to be recovered. An elaboration of a Pareto-optimal frontier has defined possible scenarios for different trends of the variables under consideration. Findings: The efficiency of the model is verified through application to a real case study concerning urban renewal of a property in disuse located in a city in Southern Italy. The outputs confirm the potentialities and flexibility of the proposed model to support urban planning decisions by improving the implementation of conservation policies, in terms of a reduced impact of urban transformation projects on the available natural land surface. Practical implications: Depending on the objectives of public sector, the model can generate a range of urban parameter combinations to be attributed to the recovered properties to achieve low consumption of natural surfaces, with bargaining between the public and private sectors around these parameters. The model can also be used in the initial phases of the renewal initiative, when it is necessary to define the costs and the revenues involved or to assess alternative solutions capable of reducing impacts on the environment. Originality/value: The model can be applied to identify the appropriate rewards in a project that can stimulate the private developers to realize further public infrastructures and services than minimum quantities established by the current local urban regulations. In this sense, the model represents an original scientific reference in the current strategies promoted by the European Union for achievement of a “no net land take” by 2050, aimed at reducing natural surface occupied by buildings and roads
Commento agli artt. 154. 155-quater, 157 e 191 c.c. per il Codice della Separazione e del Divorzio, a cura di Franco Anelli
No full textCommento agli artt. 154. 155-quater, 157 e 191 c.c. per il Codice della Separazione del del Divorzio, a cura di Franco Anell
A decisions support model for investment through the social impact bonds. The case of the city of Bari (Italy) = Un modello a supporto delle decisioni per gli investimenti attuati mediante i Social Impact Bond. Il caso della città di Bari
No full textNegli ultimi anni il sistema creditizio ha attivato delle strategie innovative per recuperare la fiducia persa deglienti pubblici derivante dalla crisi finanziaria del 2007. Si è così puntato ad un uso “sostenibile” dei capitali finanziari, sviluppando il c.d. filone degli investimenti sostenibili e responsabili (SRI). Nel mercato degli SRI, di recente è emerso il settore dell’Impact Investing. I soggetti che decidono di realizzare questa tipologia d’investimento possono avvalersi di un’ampia varietà di strumenti finanziari innovativi, in particolare dei Social Impact Bond(SIB). La diffusione dei SIB, che si configurano come una partnership tra pubblico e privato appartenente alla categoria dei c.d. Outcomes based-contracts, non è avvenuta allo stesso modo in tutti i Paesi. In Italia, i SIB sono stati impiegati in ritardo rispetto agli altri Paesi, nonostante la forte rilevanza che il Terzo Settore, rappresentato dalle imprese sociali, ha nel contesto socio-culturale italiano, e le evidenti politiche di austerity che, avviate a seguito della crisi finanziaria del 2007, hanno fortemente limitato le disponibilità economiche delle casse pubbliche. È nel contesto delineato che si inserisce il presente lavoro, il cui obiettivo è quello di sviluppare e implementare un modello che permetta di definire la miglior combinazione– espressa nei termini di ordine di priorità temporale –dei diversi social impact sector, tramite cui attivare i programmi sociali destinati a soddisfare i bisogni della comunità locale. La validità del modello di ottimizzazione pro-posto, costruito mutuando i principi e le tecniche della Ricerca Operativa, è verificata attraverso un’applicazione alla città di Bari. I risultati mostrano che l’ordine di priorità dei settori d’intervento cambia in ragione degli obiettivi che riguardano la Pubblica Amministrazione e l’investitore sociale nella fase preliminare di decisione del programma sociale da attivare, evidenziando come, in un contesto territoriale caratterizzato da differenti bisogni sociali, l’individuazione del settore in cui investire necessiti di un’accurata valutazione.In the last years the trend of the traditional finance towards the exclusive aim of the earnings maximization has been affected by the idea of a sustainable use of the financial capitals, due to the development of the Sustainable and Responsible Investment (SRI). Within the SRI market, the recent sector of the “Impact Investing“ has been growing. The subjects that decide to carry out this typology of investment can use a wide variety of innovative financial instruments, including the Social Impact Bonds (SIBs). The spread of the SIBs, which are configured as a public-private partnership belonging to the category of the “Outcomes based-contracts“, did not happen in the same way in all the countries. In Italy, the SIBs have been used late compared to other countries, despite the strong relevance that the Third Sector, represented by the social enterprises, has in the Italian socio-cultural context. Furthermore, the evident austerity policies that have started following the subprime crisis in 2007, have limited the economic resources of the public entities. This work gives a contribute in the outlined context: the aim is to develop and implement a model that allows defining the best combination – expressed in terms of order of time priorities – of the different social impact sectors, through which it is possible to activate social programs for satisfying the needs of the local community. The validity of the proposed optimization model, elaborated by borrowing the principles and the techniques of the Operational Research, has been verified through a concrete application to the city of Bari (Italy). The results have shown that the order of priority of the intervention sectors changes according to the objectives that concern the Public Administration and the private investor in the preliminary phase for the decision of the social program to be activated. Moreover, the outputs have highlighted that, in a territorial context characterized by different social needs, the identification of the sector in which to invest requires an accurate assessment
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