909 resultados para Transport Systems and Logistics


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This issue of FAL Bulletin analyses the role of good modal integration between port facilities and the rail network to ensure port competitiveness.

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For the countries of the Caribbean, the international trade and transport of goods are more important than for many others in the region (see FAL Bulletin No. 136 Maritime transport in the Caribbean), and the subregion is strongly affected by structural changes in maritime transport (see FAL Bulletin No. 142 The impact of structural changes in liner shipping on Caribbean ports).For these reasons ECLAC's Transport Unit and the Commissions' sub-headquarters in the Caribbean, jointly organized a Meeting of Experts which took place in Port-of-Spain, Trinidad and Tobago, from 14 to 15 September 2000. Twenty-six participants took part, representing different academic, intergovernmental, financial and industrial institutions and organizations.This edition of the FAL Bulletin presents some of the results of this meeting.

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Urban transport in the largest Latin American and Caribbean cities consumes about 3.5% of regional GDP — a percentage that is inflated by the effects of traffic congestion. In addition to the costs of congestion in terms of lost economic efficiency, there are also negative consequences in terms of social cohesion. The phenomenon of traffic congestion, which is caused mainly by relatively wealthy car drivers, lengthens journey times and, more importantly, forces up public transport fares. Owning a car is one of the fruits of human progress; using it in conditions of acute congestion or contamination is a social ill.

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This edition of the FAL Bulletin tells of recent events and trends in urban transport, railways and highway maintenance in Latin America and the Caribbean.

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The process of urbanization in Latin America presents new challenges for urban transport systems insofar as one of the priorities is to provide proper mobility for the increasing and complex interaction of communities.This edition of the Bulletin, prepared by Irma Chaparro, presents a summary of the recent study entitled Evaluación del impacto socio-económico del transporte urbano en la ciudad de Bogotá. El caso del sistema masivo de transporte, Transmilenio, LC/L 1786-P, October 2002, which considers the socioeconomic impact of the Transmilenio system in Bogotá. This system is part of an integrated transport strategy promoted by the District Authority over the period 1998-2001 and is an avant-garde solution to the difficult problem of transport in the city.

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This issue of the FAL bulletin focuses on the problems which public institutions encounter when formulating transport policies and the challenge of designing and implementing systemic, integrated, sustainable transport policies in the current institutional framework in the countries of Latin America.

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This issue of the FAL Bulletin analyses the situation of women in the transport sector in the countries of Latin America and the Caribbean, from the perspective of women workers. The study begins by giving an overview of labour conditions, looks specifically at the transport sector, and concludes with a series of public policy recommendation.

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This FAL Bulletin is part of a series on ports and maritime trade in the region. It is closely related to Issue No. 337 - Number 1 / 2015, which sets out the need for a new port governance in the region to address the new circumstances that have arisen in the maritime market. As such, and given the need for contextual information, this Bulletin is divided into two sections, the first devoted to the current status of world maritime trade (with special focus on container trade), and the second detailing the situation of the shipping industry.

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Prefacio de Alicia Bárcena y Luciano Sáez

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This literature review article addresses the types and the main components of different etch-and-rinse and self-etch adhesive systems available in the market, and relates them to their function, possible chemical interactions and influence of handling characteristics. Scanning electron microscopy (SEM) images are presented to characterize the interface between adhesives and dentin. Adhesive systems have been recently classifed according to their adhesion approaches in etch-and-rinse, self-etch and glass ionomer. The etch-and-rinse systems require a specifc acid-etch procedure and may be performed in two or three steps. Self-etch systems employ acidic monomers that demineralize and impregnate dental substrates almost at the same time. These systems are separated in one or two steps. Some advantages and defciencies were noted for etch-and-rinse and self-etch approaches, mainly for the simplifed ones due to some chemical associations and interactions. The SEM micrographs illustrate different relationships between adhesive systems and dental structures, particularly dentin. The knowledge of composition, characteristics and mechanisms of adhesion of each adhesive system is of fundamental importance to permit the adoption of ideal bonding strategies under clinical conditions.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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This Special Issue presents a selection of papers initially presented at the 11th International Conference on Vibration Problems (ICOVP-2013), held from 9 to 12 September 2013 in Lisbon, Portugal. The main topics of this Special Issue are linear and, mainly, nonlinear dynamics, chaos and control of systems and structures and their applications in different field of science and engineering. According to the goal of the Special Issue, the selected contributions are divided into three major parts: “Vibration Problems in Vertical Transportation Systems”, “Nonlinear Dynamics, Chaos and Control of Elastic Structures” and “New Strategies and Challenges for Aerospace and Ocean Structures Dynamics and Control”.