1,721,401 research outputs found
Spatial dimensions of electric mobility. Scenarios for efficient and fair diffusion of electric vehicles in the Milan Urban Region
No full textThe spread of Electric Vehicles (EVs) and the diffusion of the digital sharing mobility service are conditions capable of producing significant impacts on the urban environment and mobility practices. Literature mainly focuses on the technical, safety, regulatory and commercial aspects of Electric Vehicles; less attention has been paid to the contextual conditions (settlements, endowments, mobility practices), individual preferences, lifestyle and attitudinal factors, able to guarantee an efficient and fair diffusion of electric mobility in terms of use of the energy and urban resources, as well as access to urban opportunities. Based on this, the paper investigates the spatial pattern of potential demand for electric vehicles in the Milan Urban Region (North Italy), and its relevance in defining diversified and site-based EV policies for promoting a fair transition towards low carbon mobility. For analysing the relationships between electric mobility, local socioeconomic and settlement features and mobility practices, a multicriteria analysis has been carried out, processing variables that describe the contextual conditions and the propensity towards the adoption of EVs. The empirical application offers four scenarios for identifying different intensities, modes and speeds in the diffusion of EVs, in order to orient policy-making processes to support a sustainable mobility transition
Mobilità sostenibile e inclusiva
No full textUn cambiamento di paradigma verso una mobilità urbana più sostenibile e inclusiva integra soluzioni innovative per favorire l’utilizzo di forme di mobilità già sostenibili come il trasporto collettivo e la mobilità condivisa e attiva, a politiche finalizzate a promuovere l’accessibilità di prossimità e l’intermodalità.
L’accessibilità di prossimità è un concetto oggi al centro del dibattito sulla pianificazione urbana e sulla mobilità. La sua applicazione più diffusa, la cosiddetta città dei 15 minuti, ha trovato ampio riscontro nelle agende politiche di diverse città, mettendo in discussione l’approccio tradizionale della pianificazione dei trasporti, che si concentra sul miglioramento dei servizi di trasporto e delle infrastrutture per facilitare gli spostamenti
quotidiani. Il capitolo offre un quadro delle politiche avviate per traguardare modelli di mobiltà più sostenibili e inclusivi sia in ambiti urbani che in aree peri-urbane, rurali e a bassa densità insediativa
Planning for Proximity: Who, What, Where, When, Why (and How)
No full textProximity is a recurring concept in urban planning. Neighbourhood units (as defined by Clarence Perry), pedestrian pockets (proposed by Peter Calthorpe) and 15-minute cities (coined by Carlos Moreno) are just some of the definitions under which the idea of promoting places and lifestyles based on proximity emerges now and then in the academic, professional and public debate. Nonetheless, to imple-ment such an urban model through urban plans and policies, it is necessary to address several dimensions, deal with potentially tricky definitions and recognize the range of action of proximity. We intend to introduce them briefly, discussing the who, what, where, when (and how) of strategies intended to promote sustainable neighbourhoods, cities and regions through proximity
New Metrics for Inclusive Accessibility by Proximity
No full textStrategies to promote accessibility by proximity are affecting several cities around the words, aiming at creating the conditions, through planning policies, to reduce the spatial and temporal intensities and environmental impacts of daily travels by providing accessible services and opportunities in physical proximity to the citizen. In these experiences, proximity is generally declined in “functional” terms, thus conceived as the physical spatio-temporal distance to essential daily services and opportunities. The chapter proposes to enrich this concept by combining a functional dimension of proximity, measured through an infrastructure-based approach, with a relational one, focused on the exchange of resources and collaboration spontaneously activated in a community, sharing specific accessibility-related needs, problems and mobility opportunities. Both functional and relational proximities are relevant and complementary for better understanding and measuring accessibility by proximity as a condition for a more sustainable, resilient and inclusive city. Based on this, the chapter introduces an index for measuring both the functional and the relational prox-imity, called Inclusive Accessibility by Proximity Index (IAPI), to support policy for promoting forms of accessibility by proximity through the improvement of active modes-based access to essential services. Through a concrete application of the IAPI in the city of Bologna (Italy) and Mykolaiv (Ukraine), the chapter discusses how the proposed index, characterized by a high level of spatial detail, context-sensitivity, and high transferability, can be usefully employed for ensuring equitable access to services and opportunities in very different and challenging spatial conditions
Urban and rural are not symmetrical categories. The challenges of the hybridization processes
No full textThe role of urban agriculture in defining new opportunities for sustainable development in the Milan Urban Region imposes a reflection on what rurality is today in metropolitan areas, what the boundaries between “rural” and “urban” are, not only because the borders are often fractal and practices have a cross-scaling dimension, but also because new co-habitation spaces between different “urban” and “rural” ways of life are emerging, redefining, in the end, the concept of rurality and its relation with the urban conditions. To address these issues the paper takes into account two views, based on two different corpus of the literature: an “urban-centric” point of view, fosusses on the transformation processes of the contemporary cities, in term of “urban regionalization processes” (Soja, 2011) and an alternative approach, consolidated in multi-year reflections (Whitehand, 1988; Gant et al., 2011) about the forms of hybridization between urban and rural, and the features of the urban agriculture and food planning in rethinking the settlement patterns and the functional specialization in metropolitan areas
Accessibilità di prossimità a Mykolaiv. Scenari per una città dei 15 minuti.
No full textCostruire scenari futuri per Mykolaiv può rappresentare uno sforzo catartico per ripensare la città più vivibile, vitale, inclusiva e sostenibile rispetto al passato. Per orientare questo percorso, l’articolo presenta i risultati dell’implementazione di un indice di accessibilità di prossimità (IAPI) per la costruzione di scenari post-conflitto pensati per traguardare una città della prossimità, sostenibile, inclusiva e resiliente
NONEXISTENCE FOR P-LAPLACE EQUATIONS WITH SINGULAR WEIGHTS
No full textAim of this paper is to give some nonexistence results of nontrivial solutions for a quasilinear elliptic equations with singular weights in R^n / {0}. The main tool for deriving nonexistence theorems for the equations is a Pohoaev-type identity. We first show that such identity holds true for weak solutions sufficiently smooth. Then, under a suitable growth condition on the nonlinearity, we prove that every weak solution has thhe required regularity, so that the Pohosaev-type identity can be applied. From this identity we derive some nonexistence results, improving several theorems already appeared in the literature. In particular, we discuss the case when h and f are pure powers
Trespassing for mobilities. Operational directions for addressing mobile lives
Full text linkTransport geography and mobilities studies share the same object of study – mobility - which nonetheless has been differently conceptualized by the two disciplinary fields. This difference impacts their analytical, interpretative and operational approaches as well as their actual contribution to transport planning, so that despite their proximity, mobility studies and transport geography still appear as bordering disciplinary fields. To deal with concerns that affect the way we address urban mobility issues, the paper suggests putting into practice what the heterodox economist Albert Hirschman famously called trespassing, as a tactic to cross disciplinary boundaries and progress with some puzzles through detours and forays into other fields. In doing so, the paper aims at exploring how trespassing enhances the way mobilities studies and transport geography may usefully cross-fertilize each other and enhance operational responses to mobility issues, by analysing the conceptual and operational innovations that could benefit from such a reciprocal interchange. To discuss forms of significant trespassing for mobilities, the paper proposes to detect and address emerging forms of everyday mobility, taking long distance commuters (LDC) in the Milan Urban Region as an example. Here, trespassing allows the merging of quantitative and qualitative datasets to understand the articulated nature of this and other forms of contemporary mobilities. Working on the interpretative and operational challenges posed by these emerging mobilities that question key principles of the traditional ‘utilitarian approach’ to transport planning, the paper discusses the conceptual, analytical and operational directions along which trespassing may be develope
Critical Dirichlet problems on H domains of Carnot groups
No full textThe paper deals with the existence of at least one (weak) solution for a wide class of one-parameter subelliptic critical problems in unbounded domains of a Carnot group G, which present several difficulties, due to the intrinsic lack of compactness. More precisely, when the real parameter is sufficiently small, thanks to the celebrated symmetric criticality principle of Palais, we are able to show the existence of at least one nontrivial solution. The proof techniques are based on variational arguments and on a recent compactness result, due to Balogh and Kristály in [2]. In contrast with a persisting assumption in the current literature we do not require any longer the strongly asymptotically contractive condition on the domain. A direct application of the main result in the meaningful subcase of the Heisenberg group is also presented
Mobilità & Città: verso una post-car city. Ottavo Rapporto sulle città
No full textLa transizione verso una mobilità urbana sostenibile, inclusiva e sicura è un obiettivo condiviso da diverse agende urbane, orientate a perseguire un modello di città meno dipendente dall’uso dell’auto che è stato definito Post-Car City. Il cambiamento di paradigma richiede azioni di progettazione e ri-organizzazione della mobilità urbana finalizzate al riequilibrio modale in favore del trasporto pubblico, della mobilità attiva e di quella condivisa, grazie anche alla diffusione di piattaforme di infomobilità che possono migliorare l’organizzazione degli spostamenti individuali e ottimizzare la gestione dei servizi. La sfida si pone rispetto alle modalità e ai tempi per conseguire questa transizione.
Non si tratta infatti (solo) di sostenere la ricerca e la diffusione di innovazioni tecnologiche , ma di ripensare il ruolo di tutte le componenti della mobilità urbana, nell’ottica di fornire soluzioni integrate per spostamenti door-to-door e per garantire una accessibilità diffusa ai servizi. Il libro, che raccoglie contributi di studiosi di numerose università italiane, restituisce un quadro di misure avviate per traguardare un modello di Post Car City, valutarne la significatività rispetto alle diverse condizioni insediative e la applicabilità rispetto al quadro normativo di riferimento. Il Rapporto offre tre prospettive di dibattito: si interroga sull’efficacia e trasferibilità di modelli di integrazione trasporti e usi del suolo come i TOD e le politiche per sostenere forme di accessibilità di prossimità; discute del ruolo delle innovazioni tecnologiche e digitali e delle implicazioni socio-economiche e spaziali della loro diffusione e, infine, si confronta con le necessarie innovazioni normative per perseguire la transizione
- …
