1,720,959 research outputs found
Un metodologia Multicriteria Fuzzy per la minimizzazione del rischio nel trasporto su strada delle merci pericolose
No full textRegolazione ferroviaria tra gestione pubblica e liberalizzazione: lo stato dell’arte in Italia e in Europa
No full textIl trasporto ferroviario è un comparto chiave dell’economia italiana. L’infrastruttura ferroviaria italiana, tra le più estese di Europa, ha subito, nel corso degli anni, un profondo processo di mutazione con l’obiettivo di liberalizzare il settore, introducendo elementi di concorrenza.
Primaria importanza, negli ultimi decenni, ha assunto la riorganizzazione dei trasporti ferroviari a livello comunitario, e a cascata, nazionale, con il recepimento dei quattro pacchetti ferroviari e della normativa Recast. La disciplina comunitaria, infatti, a partire dal Duemila, si è posta l’obiettivo della costruzione di un mercato unico europeo e l’apertura al libero mercato negli Stati membri. L’adozione della disciplina a livello italiano ha permesso l’istituzione dell’Autorità di Regolazione dei Trasporti (ART) trasformando l’assetto regolatorio, che si connota per la centralità dell’Autorità, e l’organizzazione della infrastruttura ferroviaria. Superate le contrapposizioni iniziali al processo di riorganizzazione del settore, si sono poste anche in Italia le basi per gli sviluppi futuri, orientati ad accrescere la competitività del comparto, in linea con l’Europa. Inoltre, l’Autorità si è posta, tra gli obiettivi primari, la definizione dei meccanismi attraverso i quali gli operatori eserciscono il servizio al fine di definire le strutture di costo e di determinare i canoni di accesso da applicare per l’uso delle infrastrutture.
Il lavoro che segue analizza lo stato di avanzamento del processo di liberalizzazione nel contesto europeo e italiano, descrivendo il processo normativo che ha aperto alla libera concorrenza. Dopo aver illustrato l’evoluzione storica dell’esercizio del servizio ferroviario in Italia, focalizza l’attenzione sulle principali normative comunitarie e nazionali a partire dagli anni Novanta sino giorni nostri. Successivamente, attraverso la presentazione dell’assetto ferroviario italiano e dell’organizzazione di questo, ossia dei poteri e dei compiti dell’ART, illustra la moderna regolazione ferroviaria nazionale con un focus sui canoni di accesso alle infrastrutture
Influencing Factors for Potential Bike-Sharing Users An Empirical Analysis During the COVID-19 Pandemic
No full textClimate change awareness is becoming widespread. The consequences of pollution are increasingly evident, and transport, being one of the main sources of congestion and pollution, is cited as the major culprit. In this context and as one of the few positive externalities of the COVID-19 pandemic, micro-mobility and, more generally, environmentally friendly and co-managed mobility, are gaining ground. In particular, bike-sharing has seen double-digit growth rates of diffusion and use in its various forms. It is a fast and efficient solution, with zero emissions, convenience, speed of movement for short distances and beneficial effects on users’ health. However, its use is still rather limited in Italian cities. Through an online survey conducted at the national level in 2020, we shed light on the elements that determine the adoption of bike-sharing among potential users. Through factor analysis, ordered logit and probit regressions, we have identified the factors that facilitate the extensive adoption of this service. In addition, we have seen how consumers’ habits have changed, comparing them in the pre- and post-COVID-19 lockdown periods and highlighting the health benefits for both potential and current users. The results and policy implications could be useful for local regulators and bike-sharing scheme operators
Multicriteria Fuzzy Methodology for Feasibility Study of Transport Projects: Case Study of Southeastern Trans-European Transport Axes
No full textThis paper presents a multicriteria fuzzy methodology for evaluating the transport network that could better connect the Balkans to the European Union (EU). The Balkan countries have not yet solved the problems related to poverty, unemployment, and development. To address their problems, a comparison study conducted the implementation of Egnatia Way Corridor VIlI, and of the Durrës, Albania-Skopje, Macedonia-Thessaloniki, Greece-Kipi, Greece, route as an intermediate solution between the two. A functional comparison is made of the routes not only as physical transport systems, but also as instruments of economic and political development. The proposed approach is a multicriteria fuzzy analysis as developed by G. Munda, the so-called NAIADE (novel approach to imprecise assessment and decision environments) method, to study the possible integration of the Balkan countries (Albania, FYR Macedonia, and Bulgaria) into the EU. This method can be charted on an impact matrix, which contains different numerical values and therefore allows the use of information and data with various degrees of accuracy to determine the most efficient solution among the project alternatives. An equity analysis can also be performed to evaluate the alternative infrastructures the groups involved in the decision-making process will consider. The fuzzy multicriteria methodology will be used to determine whether the more efficient solution among the alternatives is also the fairest
A fuzzy data meta training system for ranking hub container terminals
No full textThe potential and critical aspects of any transport service can be highlighted through the estimation of appropriate performance indicators of the examined system. Commonly, container terminal analysis is based first on the evaluation and comparison of quantitative parameters that describe the level of service of the terminal and, on the other side by means of performance indicators related to terminal productivity. In this paper a Fuzzy Inference System for evaluation of a synthetic performance indicator is proposed. This tool could help planners and managers in terminals performances analysis and ranking as well as in assessing the effects of possible intervention on the systems. The proposed approach is suitable in the case of hub container ports. In fact this system is characterised by significant uncertainties and it is not always governed by certain rules, rational behaviour, so that it cannot be easily represented by traditional mathematical techniques and models. In our opinion, could be convenient to define the values of the considered parameters by explicitly define them in an approximate way, that is to say by fuzzy set
The project planning of urban decongestion - A contingent valuation methodology of making scenarios
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
- …
