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SSRN 2023年

作者： de Souza, Thiago Delgado Enríquez-León, Alexis Jair Mesquita, Andressa Rosa da Fonseca Martins Gomes, Otávio Ulsen, Carina Underwood, Benjamin Shane Aragão, Francisco Thiago Sacramento Civil Engineering Program - COPPE Federal University of Rio de Janeiro Rio de Janeiro21941-596 Brazil Transportation Engineering Program - COPPE Federal University of Rio de Janeiro Rio de Janeiro21941-596 Brazil Center for Mineral Technology - CETEM Rio de Janeiro21941-908 Brazil Mining and Petroleum Engineering Program - POLI-USP Universidade of São Paulo São Paulo05508-010 Brazil Civil Construction and Environmental Engineering Program North Carolina State University Raleigh27695-7908 United States

Aggregate particles within an asphalt mixture are coated in a thin film of binder. Several studies and even mix design procedures have been based on an implied correlation between the binder film thickness (BFT) and the mechanical properties of these mixtures. Those studies generally define the BFT based on a predictive equation linked to one or more theoretical considerations, but without direct experimental determination of the BFT. However, recent developments of powerful scanning electron microscopes (SEMs) and digital image processing (DIP) techniques allow one to perform detailed analysis of microstructural images and thus directly measure the BFT value. This paper presents an analysis of BFT and mastic film thickness (MFT) within asphalt concrete (AC) mixtures using high-resolution SEM images and DIP. Based on this methodology, the measured mean BFT and MFT values ranged from 5.6 µm to 10.8 µm, and from 20.8 µm to 28.2 µm, respectively. Additionally, a BFT analysis considering fine aggregate matrix (FAM) phase within the ACs was pursued. A criterion to obtain FAM BFT is proposed and it can be useful in volumetric FAM mix design and sample fabrication. © 2023, The Authors. All rights reserved.

关键词： Film thickness

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Drivers of the World Tourism: A Regional View

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SSRN 2023年

作者： Ventura, Rodrigo V. Fernandes, Elton Cabo, Manoela de Mello Carvalho, Carla F. Fernandes, Vicente Aprigliano COPPE Production Engineering Program UFRJ Federal University of Rio de Janeiro Rio de Janeiro Brazil COPPE Transportation Engineering Program UFRJ Federal University of Rio de Janeiro Rio de Janeiro Brazil IBGE Brazilian Institute of Geography and Statistics Rio de Janeiro Brazil Escuela de Ingeniería de Construcción y Transporte Pontificia Universidad Católica de Valparaíso Chile

The commercial air transport innovation and its technological evolution, especially after the Second World War, are fundamental factors in the people's movement growth between the nations of the planet. Advances in air transport and income growth have allowed more and more people to realise the dream of getting to know and interacting with cultures from other countries, most times very far from their places of residence. Many studies examine the travel demand evolution more broadly or specifically between locations, which we can characterise as tourist demand. The quest to understand the drivers that move people between different destinations on the planet is a fundamental element of the company's planning and for the public policies formulation. This study contributes to this sense, analysing three socioeconomic factors of the world reality: globalisation, the countries’ economic structure and this structure's dynamics. Using panel data regression analysis methodology and the World Bank's world development indicators, relationships between the international tourism evolution and the mentioned socioeconomic factors are estimated and discussed. Each of the three perspectives analysed shows a strong relationship with the historical demand for tourism. The globalisation indicator revealed a growing positive impact on the level of tourist movement. The country's economic structure indicator showed a significant difference between countries, which suggests the need to examine tourism according to regions concept. Among dynamics indicators, income was the major factor in the tourism indicators variation. © 2023, The Authors. All rights reserved.

关键词： Regression analysis

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The strategies of private higher educational institutions during the Covid-19 pandemic. A review of literature

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Social Sciences and Humanities Open 2023年第1期8卷 100581页

作者： do Lago, Mauricio Maynard Fernandes, Elton Barboza, Raphael Cunha COPPE Production Engineering Program UFRJ Federal University of Rio de Janeiro Rio de Janeiro Brazil COPPE Transportation Engineering Program UFRJ Federal University of Rio de Janeiro Rio de Janeiro Brazil Cefet-RJ – Centro Federal de Educação Tecnológica Celso Suckow da Fonseca Rio de Janeiro Brazil

This paper sought a qualitative/quantitative bibliometric approach, using the literature review, to present the main strategies with a bias toward sustainability, used by private Higher Education Institutions, in an attempt to neutralize the effects of the lockdown caused by the Covid-19 pandemic. To meet the reliability requirements of the source of the papers used, a search was made in the Web of Science and Scopus databases, where 47 papers were selected. As a result, there was a scattering of strategic actions in several works. However, no actions were identified that orientated to deliberate planning, as a way of confrontation with the new environment that was quickly established, caused by the Covid-19 pandemic. Instead, we found fragmented or emerging strategic actions, mostly concentrated on Teaching activities as a possible response, given the circumstances, to a situation that presented itself as an emergency. This study divides the actions identified in the strategic areas of the Institutions into Teaching, Research, Extension, Business Management, and Teacher Training. © 2023

关键词： Covid-19 Private university Strategy Sustainable management

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A Multi-Tier Approach to Estimate Energy Efficiency in Urban Passenger Mobility

Research Square

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Research Square 2020年

作者： Gonçalves, Daniel Neves Schmitz de Mello Bandeira, Renata Albergaria de Assis, Tássia Faria D'Agosto, Marcio Almeida Goes, George Vasconcelos de Almeida, Isabela Rocha Pombo Lessi da Costa, Mariane Gonzales de Freitas, Rodrigo Rodrigues Program of Transportation Engineering COPPE UFRJ. Technology Center University City–Rio de Janeiro Building H–Room 117 Rio de Janeiro999074 Brazil Military Institute of Engineering Praça General Tibúrcio 80 Praia Vermelha Rio de Janeiro999074 Brazil Federal Center of Technological Education Celso Suckow da Fonseca Rio de Janeiro999074 Brazil

Background: Recent studies evidence a lack of accurate methods to estimate energy efficiency in urban areas. This is due to the complex nature of obtaining wide range of activity and energy data from a single municipality, especially from developing countries, where data is usually scarce. Under these circumstances, this paper develops a method for estimating the energy efficiency in urban passenger mobility, considering three different levels of detail. The innovative factor is the use of a multi-tier approach to compare and adjust outputs. The method was applied in Sorocaba, Brazil, estimating a baseline of energy efficiency in this city. Results: Results show that energy efficiency varied from 0.67 passenger per kilometer/Mega Joule in 2013 to 0.70 passenger per kilometer /Mega Joule in 2017, which are consistent with the Brazilian passenger transport energy efficiency. Conclusions: The method proved to be an important mechanism for benchmarking purposes and for the decision-making process on transport investments. Moreover, it can be applied in cities from countries with different cultural and economic contexts. © 2020, CC BY.

关键词： Energy efficiency

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A semi-analytical solution of the dynamic behavior of free-spanning submarine pipelines conveying fluid 26

A semi-analytical solution of the dynamic behavior of free-s...

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26th Annual International Ocean and Polar engineering Conference, ISOPE 2016

作者： Li, Tongtong Li, Xinzhong Liang, We I Jian, Su An, Chen Duan, Menglan Offshore Oil and Gas Research Center China University of Petroleum Beijing102249 China CNOOC Research Institute Beijing102249 China College of Mechanical and Transportation Engineering China University of Petroleum Beijing102249 China Nuclear Engineering Program COPPE Universidade Federal do Rio de Janeiro Rio de Janeiro21941-972 Brazil

ISBN: (纸本)9781880653883

Subject to the influence of both the external flow of the current and the internal flow of the fluid, free-spanning submarine pipelines are susceptible to oscillation which consequently will cause fatigue damage to the pipelines. The operation safety of submarine pipelines is of ultimate importance in underwater production. A wake oscillator model is adopted to describe the vortex shedding acting on pipelines. The dynamic response of free-spanning submarine pipelines conveying internal fluid is analytically and numerically studied using the generalized integral transform technique (GITT). Firstly, the results are calculated under pinned-pinned boundary condition, and validated against previous literature. Then the clamped-clamped boundary condition is also investigated. With GITT, the coupled fluid-structure system of partial differential equations (PDEs) indicating the transverse displacement is transformed into a system of second-order ordinary differential equations (ODEs) in temporal variable. The convergence behavior is evaluated. In addition, parametric studies are carried out to analyze the influence of different internal and external flow velocities. GITT is proved to be an adequate approach for analyzing the dynamic response of free-span submarine pipelines under the influence of both the current and the internal flow. © Copyright 2016 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Fluid structure interaction

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Determining Critical Links in a Road Network: Vulnerability and Congestion Indicators

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Procedia - Social and Behavioral Sciences 2014年 162卷 158-167页

作者： Eduardo Leal de Oliveira Licínio da Silva Portugal Walter Porto Junior Doctoral student Transportation Engineering Program of COPPE/UFRJ Brazil Professor Transportation Engineering Program of COPPE/UFRJ Brazil

This article focuses on the performance attributes congestion and vulnerability , proposing a conceptual framework based on recent research. We present a case study that allows observing the differences obtained in the ranking of importance of the links of a road network according to each of the two attributes. The differences observed suggest that the exclusive use of congestion indicators to determine performance bottlenecks can lead to misleading solutions.

关键词： congestion vulnerability road network performance indicators.

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Access of Wheelchair Users in Sportive Mega Events: The Case of Confederation Cup

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Procedia - Social and Behavioral Sciences 2014年 162卷 148-157页

作者： Lorena de Freitas Pereira Mariana Silva de Albuquerque Licínio da Silva Portugal Master Transportation Engineering Program of COPPE UFRJ Brazil Graduate Student Physical Education School of UFRJ Brazil Professor Transportation Engineering Program of COPPE UFRJ Brazil

This article aims to evaluate the Access conditions for wheelchair users in sporting mega-events. It will show the characterization of some attributes related with the walk, as the variables that express them, showing the studied group particularities. The data collect was made in June, 2013 by questionnaire application during the competitions of The World Confederation Cup realized in Rio de Janeiro on the Maracanã Stadium. This paper establishes the principal attributes identified based on the literature review and the exploratory field research, signalizing the satisfaction with the security and comfort attributes, and also the main infrastructural problems at surroundings, that are the ramps leveling the streets to the sidewalks and the flowerbeds along of the public footpaths. Reinforcing the necessity of rethink the planning of the public spaces focusing in the Universal Design, but contemplating explicitly the studied group perceptions by the Service Quality concept.

关键词： Mega-events wheelchair users accessibility hubs generating trips.

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Analysis of Explanatory Variables of Rail Ridership: The Situation of Rio de Janeiro

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Procedia - Social and Behavioral Sciences 2014年 162卷 449-458页

作者： Gustavo Teixeira de Andrade Jorge Augusto Martins Gonçalves Licinio da Silva Portugal Program of Transportation Engineering – COPPE/UFRJ. Technology Center Building H - Room 106. University City - Rio de Janeiro. 21949-900 Brazil Network of Travel Generator Center – PET-COPPE/UFRJ. Technology Center Bulding H - Room 106. University City - Rio de Janeiro. 21949-900 Brazil

This paper aims to establish, from the variables incorporated in the bibliography, the ones potentially indicated to explain and rate the rail ridership, considering the characteristics and specificities of the suburban trains and stations of Rio de Janeiro Metropolitan Area (RJMA) as well as its environment. It will be considered the data of railway branch lines of RJMA and their links, along with the econometric models that will be determined, taking into account the explanatory variables of boarding and landing rates of train stations. Contrary to what is observed in international literature, the HDI (Human Development Index), average income and population variables present low interrelation with the following dependent variables: boarding rate, landing rate and total amount of journeys. The HDI calls our attention because it presents a negative interrelation, which strengths the idea that in Brazil the train offer does not contribute to a human development. The low correlation with the average income and population may explain the low quality of the service and the unattractive image of the train. The variables that present greater explanatory capacity of railway rates were the number of jobs in the area of influence and the numbers of extensions of the train itself. This suggests that in Rio the train plays the role of the transport that will take the employees to their workplaces, highlighting the importance of connectivity to obtain passengers.

关键词： Railway stations Trip generation hubs Travel management

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Use of the analytic hierarchy process to evaluate transit fare system

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Research in transportation Economics 2012年第1期36卷 50-62页

作者： Nassi, Carlos David Costa, Fabiene Cristina de Carvalho da Transportation Engineering Program - COPPE Federal University of Rio de Janeiro Technology Center Cidade Universitária 21945-970 Rio de Janeiro Bloco H Sala 106 Brazil 20520-050 Rio de Janeiro Rua Conde de Bonfim 211 Sala 813 Brazil

The transportation fare system influences the mobility of a region and the life quality of its inhabitants. This study aims to evaluate a region's optimal fare system by using the analytic hierarchy process, based on a survey among transportation experts, divided into three categories: operators, professors/consultants and government officials. The results are presented divided by category and overall, and the performance of the most important relative criteria to establish a fare system is determined. The most important criterion according to all the selected experts was the fare price, with 21.5%. The fare system determined as the best was distance/zone (31.1%) and the worst was a flat fare system (7.2%). In addition, we show the influence of the fare price criterion in each fare system through sensitivity charts and highlight its importance for all three groups of experts to evaluate the fare system. © 2012 Elsevier Ltd.

关键词： Fare system Pricing strategies transportation planning

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Airport contributions to local air pollution case study: Rio de Janeiro International Airport

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Eleventh Interantional Conference on Modelling, Monitoring and Management of Air Pollution, Air Pollution XI

作者： D'Agosto, M.A. Ribeiro, S.K. Transportation Engineering Program COPPE Federal University of Rio de Janeiro Brazil

ISBN: (纸本)1853129828

This paper outlines a procedure for estimating the relative contributions by airports to local air pollution, taking into account the operations of aircraft, as well as support vehicles and equipment, in addition to any other items required for routine airport activities. A selected set of air pollution sources is taken as a comparative reference, drawn from the airport surroundings. The results of this procedure help identify each source of emission by relative importance, indicating the principal actions required to lower these emissions. A case study is presented based on specific information for the Rio de Janeiro International Airport - RJIA.

关键词： Air pollution

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