Search results for "Sporta"
showing 10 items of 1176 documents
Operational and financial performance of Italian airport companies: A dynamic graphical model
2016
Abstract This paper provides evidence on the relationship within a set of financial and operational indicators for Italian airports over 2008–2014. The limited sample size of national and regional airports suggests to apply the penalised RCON ( V , E ) model, which falls within the class of Gaussian graphical models. It provides both estimate and easy way to visualise conditional independence structures of the variables. Moreover, it is particularly suitable for handling longitudinal data where small number of units and huge number of variables have been collected. Findings highlight that a qualified concept of size matters in determining good financial performance. Specifically, increasing…
Why women do not use the helmet when riding a bicycle
2018
Women seem to use the helmet when riding a bicycle less frequently than men. Two possible explanations for this behavior are that 1) it is less appalling to them because of lack of comfort or other reasons, or 2) they use bicycles in a more cautious way than men so they feel that they do not need the helmet as much. The present paper explores these two explanations in 5,691 cyclists that responded to an online survey conducted in 17 countries as part of an EU COST project. Answers to questions related to the two aforementioned explanations were analyzed graphically and three questions that showed the most conspicuous differences between males and females were identified. These were: ‘Helme…
School Bike Sharing Program: will it Succeed?
2020
Abstract Encouraging active and sustainable transport modes in order to limit the excessive use of cars, as well as reducing pollutant emissions and creating livable urban environments, has become one of the priorities for policymakers in recent years. The introduction of innovative systems increasingly being introduced in modern cities, such as bike sharing, can certainly contribute to the spread of cycling and thus allow a radical change in the mobility habits of their citizens. This can be especially true for high-school students who are often otherwise accompanied by their parents with private cars. This article aims to assess the influence that a bike sharing program for students has o…
Les effets de la livraison à domicile sur l'accès aux produits alimentaires: le cas des grandes surfaces alimentaires et des cybermarchés de l'aire u…
2012
International audience; L’accessibilité des populations aux Grandes Surfaces Alimentaires (1) (GSA) est différenciée selon les espaces. Alors qu’au cœur des villes, les urbains peuvent accéder à pied à une offre diversifiée, les périurbains et les ruraux doivent parcourir plusieurs kilomètres en voiture pour accéder au supermarché le plus proche (Motte-Baumvol, 2008). Si une très grande majorité de périurbains n’éprouvent pas de difficultés, certains y font face plus difficilement tels que les ménages sans voiture, les personnes âgées ou les familles avec des enfants en bas âge. Pour ces ménages, la livraison à domicile, notamment à partir de la vente en ligne, peut constituer un moyen d’am…
A three-stage competition game in an air transport network under asymmetric valuation of flight frequencies
2020
Abstract This paper analyzes the effects of changes in aeronautical charges as brought by several airport management regimes on the air transport industry. Airlines compete on both price and non-prices variables, where connecting passengers have asymmetric valuations of flight frequencies in different legs. Changes in landing fees trigger airlines reactions on flight frequencies and airfares, whose sign depends on the weight attached to flight frequencies. Thus, an increase in the spoke landing fee leads to more international flights under low valuations of frequencies at spoke airports. Simulation exercises show that profit-maximizing aeronautical charges only at the spoke airport are pref…
From bus to tramway: Is there an economic impact of substituting a rapid mass transit system? An empirical investigation accounting for anticipation …
2018
Abstract Hedonic pricing models and price equations have been extensively used to retrieve the implicit prices of urban externalities through real estate markets. Many applications have been devoted to investigating the impact of new mass transit systems, such as rail infrastructures. However, the implementation of such infrastructures usually takes some time and markets can react with an anticipation effect that can vary according to the different development phases. Moreover, the impact may be different if it acts as a substitute to existing rapid transit services. This paper focuses on the impact of substituting bus rapid transit (BRT) for light rail transit (LRT) services, taking into a…
Smart logistics as a basis for the development of the smart city
2019
Abstract In this article the issues of role and meaning of intelligent technologies has been undertaken especially in area of logistics, without which development of smart cities would be actually impossible. Even though we can argue about it, what it actually means “intelligent”, without a doubt it covers use of modern Technologies. They let to reduce negative influence of flow of good and people in urbanized areas, at the same time they increase level of quality of life in the city. In the article we discussed a trial of defining concept of ‘smart city’. As a main goal we set indication of result in area of smart logistics, that let to optimize logistic processes through digitalization an…
Messages beyond the phone: Processing variable message signs while attending hands-free phone calls.
2021
We examined the effects of different types of cognitive distraction coming from a hands-free phone conversation on the processing of information provided by variable message signs (VMS), on driving performance indicators, and on a physiological index of mental effort (heart rate). Participants drove a route in a driving simulator and had to respond to VMS messages under three conditions: no-distraction, visuospatial distraction (attending phone calls with questions inducing visuospatial processing), and conceptual distraction (attending phone calls with questions requiring semantic memory). Results showed more errors responding to VMS messages in the visuospatial distraction condition. In a…
The emissions reduction potential of substituting short-haul flights with non-high-speed rail (NHSR): The case of Finland
2021
Abstract Replacing short-haul flights with high-speed rail (HSR) has been widely discussed as one solution to mitigate the climate change impacts of aviation. However, although HSR can provide travel times similar to those provided by short-haul flights, and at lower emission levels, it also requires considerable investments in time and infrastructure to build. Instead, this study considers the feasibility of replacing short-haul flights with existing non-high-speed rail (NHSR). Our study is based in Finland, a country that has an extensive route network of short-haul flights but does not possess any HSR. We compared all 16 city pairs for which short-haul flights are offered with existing N…
Dimensions fractales et réalités périurbaines. L'exemple du Sud de Bruxelles
2004
This exploratory paper aims at showing how the fractal dimension can be used to characterise the spatial structure of built-up areas within the periurban fringe. The southern periphery of Brussels is considered here. Two estimation techniques (correlation and dilation) are applied to surface areas, and one (correlation after dilation) to the borders of built-up areas. They are applied to windows of fixed size. Fractal dimensions are then compared with traditional socio-economic and morphological indicators. The results are interpreted in the context of urban sprawl and polycentric development of the peripheries. These analyses confirm the usefulness of the fractal approach for describing bu…