Search results for "TRADE"
showing 10 items of 1475 documents
Assessing the Environmental Performances of Urban Roundabouts Using the VSP Methodology and AIMSUN
2022
In line with globally shared environmental sustainability goals, the shift towards citizen-friendly mobility is changing the way people move through cities and road user behaviour. Building a sustainable road transport requires design knowledge to develop increasingly green road infrastructures and monitoring the environmental impacts from mobile crowdsourced data. In this view, the paper presents an empirically based methodology that integrates the vehicle-specific power (VSP) model and microscopic traffic simulation (AIMSUN) to estimate second-by-second vehicle emissions at urban roundabouts. The distributions of time spent in each VSP mode from instantaneous vehicle trajectory data gathe…
Future Development of an Energy-Efficient Electric Scooter Sharing System Based on a Stakeholder Analysis Method
2023
E-scooters as a new form of mobility are gaining more and more popularity. This popularity results from the flexibility of this mode of transport, but above all from the positive impact on the natural environment through the much higher energy efficiency of an e-scooter compared to a motor vehicle (according to the literature the rate is 2 km per kWh equivalent for a motor vehicle and the range is 90–100 km per kWh in the case of an e-scooter). This paper introduces a discussion on the future development of an energy-efficient electric scooter sharing system based on stakeholder analysis methods. The implementation of the e-scooter sharing system involves linking several areas of human acti…
Optimization and sensitivity analysis of existing deep learning models for pavement surface monitoring using low-quality images
2022
Automated pavement distress detection systems have become increasingly sought after by road agencies to in crease the efficiency of field surveys and reduce the likelihood of insufficient road condition data. However, many modern approaches are developed without practical testing using real-world scenarios. This paper ad dresses this by practically analyzing Deep Learning models to detect pavement distresses using French Secondary road surface images, given the issues of limited available road condition data in those networks. The study specifically explores several experimental and sensitivity-testing strategies using augmentation and hyper- parameter case studies to bolster practical mode…
Eventi e giornate di studio. L’impegno di SIIV nell’avanzamento delle conoscenze di settore.
2009
La Società Italiana di Infrastrutture Viarie, impegnata nella promozione dell’avanzamento delle conoscenze nel settore di interesse e nella diffusione della cultura delle infrastrutture stradali, ferroviarie e aeroportuali, propone un importante evento scientifico il 4th EATA Conference 2010, che avrà luogo presso la sede di Parma nel giugno del 2010. Si riferisce, inoltre, di un evento culturale organizzato dalla sede universitaria di Cagliari nel Marzo 2009 intitolato Vulnerabilità di una rete viaria: implicazioni climatiche, idrogeologiche e responsabilità dell’ingegnere civile.
La guerra ideológica
1982
Manifiesto firmado por sesenta intelectuales norteamericanos en apoyo a la guerra de Afganistán y las otras guerras "contra los países del Eje del Mal" anunciadas por Bush tras el 11-S.
La corruption et le droit du commerce international
2020
Corruption is a practice that hinders development and can affect various activities, including international economic activities. It undermines the proper functioning of international trade requiring the need to fight against itThis study aims to highlight the existence of an anti-corruption legal framework implemented by international trade law which resists to corruption fight. This anti-corruption legal framework is materialized by the existence of tools that can be classified into two categories: tools belonging to the corpus of international trade rules and complementary tools provided by other legal rules very widely connected to international trade law, such as international arbitrat…
Essays on Corruption
2021
Paper III and Paper IV is not published yet. Corruption is blamed for reductions in operational efficiency, information asymmetry, limited income distribution, policy failure, and weak economic growth and development. Corruption can originate from either the “demand-side” (the recipients of the bribe) or the “supply-side” (the givers of the bribe). This double edge effect of corruption on the economy and society makes it a multidisciplinary subject and phenomenon. Thus, scholars from different fields and disciplines, such as finance, banking, economics, accounting, law, foreign aid, and international business, examined and analyzed corruption as a multidisciplinary subject. In this disserta…
Comparison between bitumen modified with crumb tyre rubber and styrene butadiene styrene
2009
The improvements in terms of mechanical properties due to the use of polymers to modify bitumens in road paving applications have already been widely demonstrated. The aim of this paper is to show how the rheology and the performance of a bituminous binder mixed with crumb rubber recycled from used tyres (CR-MB), could be comparable with a styrene butadiene styrene (SBS-MB) created with the same base binder and currently used for road applications. Physical, chemical and performance characterization followed by rheological and storage stability analyses have been undertaken as the basis for the comparison. The results of the investigation indicate that the blended CR-MB shows large improvem…
Analytical approach for the mix design optimisation of bituminous mixtures with crumb rubber
2018
The present paper provides a basis for defining a mix design method specifically tailored to rubberised asphalt that takes into account the behaviour of crumb rubber. An analytical approach to quantifying the recovered deformation of crumb rubber in the post-compaction phase has been developed in order to adjust the number of gyrations proposed by the Superpave method for compacting specimens of hot mix asphalt using a Superpave gyratory compactor. The maximum allowable amount of rubber has been calculated. Finally, a step-by-step protocol has been proposed in order to fabricate and compact crumb rubber modified mixtures with the gyratory compactor.
Increased Stability of Rubber-Modified Asphalt Mixtures to Swelling, Expansion and Rebound Effect during Post-Compaction
2017
The application of bituminous mixtures modified with rubber from scrap-tires require attention and care during mixing and compaction. Rubber modifies the properties because it reacts in the internal structure of bitumen at high temperatures changing the performance of the mixture (interaction process of solvents with binder-rubber aggregate). The main change is the increasing of the viscosity and elasticity of the binder due to the larger sizes of the rubber particles by dry process but, this positive effect is counteracted by short mixing times, compared to wet technology, and due to the transport processes, curing time and post-compaction of the mixtures. Therefore, negative effects as sw…