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Cooperative Mainstream Traffic Flow Control on Freeways

IFAC-PapersOnLine 2016年第32期49卷 89-94页

作者： Müller, Eduardo R. Carlson, Rodrigo C. Kraus, Werner Post-graduate Program in Automation and Systems Engineering Federal University of Santa Catarina FlorianópolisSC88040-900 Brazil

Mainstream Traffic Flow Control (MTFC) is a freeway traffic control method which aims to maximize throughput by regulating the mainstream flow upstream from a bottleneck. Using Variable Speed Limits (VSL) as actuators for MTFC, we study the effects of different penetration rates of automated vehicles on MTFC-VSL. Automated vehicles can be designed to be much more strict in complying with VSL, which leads to a better MTFC performance than with ordinary VSL. Simulation results show that higher penetration rates translate into better performance with a significant effect up to 30% penetration rate, and very little gains beyond that; and that mixing forms of applying VSL may be detrimental to traffic. © 2016

关键词： Highway traffic control Feedback control Flow control Speed control Automated vehicles Co operative systems Freeway traffic controls Mainstream flow Maximize throughput Penetration rates Traffic flow control Variable speed limits

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Lifecycle Management of Product-service systems: A Preliminary Investigation of a White Goods Manufacturer

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Procedia CIRP 2017年 64卷 31-36页

作者： Thayla T. Sousa-Zomer Lucas Magalhães Eduardo Zancul Paulo A. Cauchick-Miguel Post-graduate Program in Production Engineering Federal University of Santa Catarina Campus Universitário Trindade Caixa Postal 476 88040-970 Florianópolis SC Brazil Post-graduate Program in Production Engineering University of São Paulo Av. Prof. Almeida Prado 128 05508-070 São Paulo SP Brazil Production Engineering Department University of São Paulo Av. Prof. Almeida Prado 128 - 05508-070 São Paulo SP Brazil

Product-Service systems (PSS) have been discussed as promising business strategies towards a circular economy (CE). However, PSS solutions are not necessarily more sustainable. PSS lifecycle management may play an important role to improve the offering and achieve sustainability benefits. Nevertheless, bottom-up issues for CE implementation in the industry such as lifecycle management are still little discussed in the literature. In this sense, this paper aims to explore a PSS business strategy adopted by a large white goods manufacturer that transitioned from a linear to a circular business, and the practices applied throughout the entire lifecycle that may be valuable to achieve CE requirements. A case-based approach was employed in this study and multiple sources of evidence were considered. Data were analyzed in the light of the literature, considering an inductive approach. The main preliminary findings suggest that resources consumption reduction and cost savings can be obtained through lifecycle management practices that take into consideration CE issues since the beginning of life of the PSS offering. Design practices, the adoption of different strategies at the end of life (reuse/remanufacturing or recycle), and the implementation of cleaner production practices are some of the identified practices that can contribute to achieve resource efficiency and CE requirements. This is a work in progress and further work is going to focus on a quantitative analysis of the environmental and economic performance of this PSS. In addition, as this study focused on a use-oriented PSS, future research may compare lifecycle management practices adopted by other and distinct PSS categories, and how different lifecycle management practices may contribute to achieving resource efficiency.

关键词： sustainable product-service systems circular business models lifecycle management

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Proposal of a Hotspot-based Approach to Identifying Social Impacts along the Product-Service systems Life Cycle in the Early Design Phases

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Procedia CIRP 2017年 64卷 85-90页

作者： Thayla T. Sousa-Zomer Paulo A. Cauchick-Miguel Post-graduate Program in Production Engineering Federal University of Santa Catarina Campus Universitário Trindade Caixa Postal 476 88040-970 Florianópolis SC Brazil Production and System Engineering Department Federal University of Santa Catarina Campus Universitário Trindade Caixa Postal 476 88040-970 Florianópolis SC Brazil

The potential for sustainability has been highlighted as one of the most important characteristics of product-service systems (PSS). Nevertheless, a PSS is not intrinsically sustainable. Methods and tools for PSS sustainability assessment should be developed to be integrated into the design process, especially in the early design phases, in order to conceive sustainable solutions. In addition, a PSS should be planned considering the three sustainability dimensions, from a life cycle perspective. However, PSS design and assessment considering the full life cycle is scarcely addressed in the literature, especially concerning the social dimension of sustainability. In this sense, this study proposes a streamlined life cycle assessment based approach to identify potential social impacts along the PSS life cycle that can be integrated into the early PSS design stages. The proposal is based on a hotspot analysis, which identifies where in the life cycle the most significant issues may occur. The proposal was developed in three main phases, anchored in both hotspots analysis and PSS literature. After developing it, 10 experts in PSS and sustainability assessed the proposal strengths and weakness. Some suggestions were offered by the researchers and improvements were introduced to the proposal regarding PSS life cycle phases and the social impact subcategories. The experts considered the hotspot analysis suitable to be applied in the early design stages when there is not much information yet regarding the system to conduct a complete life cycle assessment. The next step of this research is the proposal assessment by practitioners in industry. Further work will also integrate the environmental dimension of sustainability into the proposal.

关键词： sustainable product-service systems sustainability assessment social impacts early design stages

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Resolution of one-dimensional bin packing problems using augmented neural networks and minimum bin slack

Resolution of one-dimensional bin packing problems using aug...

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作者： De Almeida, Ricardo Steiner, Maria Teresinha Arns Industrial and Systems Engineering Post-Graduate Program Pontifical Catholic University of Paraná - PUCPR Curitiba Brazil

The objective of this work is to compare the augmented neural network (AugNN) metaheuristic to minimum bin slack (MBS) heuristic to solve combinatorial optimisation problems, specifically, in this case, the one-dimensional bin packing problem (1D-BPP), a class of cutting and packing problems (CPP). CPP are easily found among various industry sectors and its proper treatment can improve the use of stocks in cutting problems or optimise physical space in packing problems. In order to optimise AugNN parameters, a design of experiment (DOE) was applied in order to guide a statistical analysis of different configurations of AugNN. The tests, developed in many benchmark problems found in the literature, showed that MBS heuristic was, in general superior, both in terms of the solution quality, which is about 70% better, and computational time, which is about 90% less. Copyright © 2016 Inderscience Enterprises Ltd.

关键词： Design of experiments

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A stochastic method for characterization of soft magnetic material with a damped LC circuit 17

A stochastic method for characterization of soft magnetic ma...

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17th Biennial IEEE Conference on Electromagnetic Field Computation, IEEE CEFC 2016

作者： Eckert, Paulo R. Righi, Luiz A. Filho, Aly F. Flores Kanieski, Joao M. Federal University of Rio Grande do Sul Post-Graduate Program in Electrical Engineering RS Brazil Federal University of Santa Maria Department of Electromechanical and Power Systems RS Brazil

ISBN: (纸本)9781509010325

This paper presents a method to determine hysteresis parameters of an inductor's core with a closed magnetic circuit based on electric current and voltage curves of a damped LC circuit. The proposed procedure makes use of the concept of hysteresis modeling by separating the magnetic field into four components, which can be linearized in terms of its parameters. Thus, curves can be adjusted with a stochastic method in order to match experimental ones, allowing for determination of hysteresis parameters. © 2016 IEEE.

关键词： Hysteresis

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Resolution of one-dimensional bin packing problems using augmented neural networks and minimum bin slack

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International Journal of Innovative Computing and Applications 2016年第4期7卷 214-224页

作者： de Almeida, Ricardo Steiner, Maria Teresinha Arns Industrial and Systems Engineering Post-Graduate Program Pontifical Catholic University of Paraná - PUCPR Curitiba Brazil

关键词： Design of experiments

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Exploring the Critical Factors for Sustainable Product-service systems Implementation and Diffusion in Developing Countries: An Analysis of two PSS Cases in Brazil

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Procedia CIRP 2016年 47卷 454-459页

作者： Thayla T. Sousa-Zomer Paulo A. Cauchick Miguel Post Graduate Program in Production Engineering Federal University of Santa Catarina (UFSC) Florianópolis Brazil Production and System Engineering Department Federal University of Santa Catarina (UFSC) Florianópolis Brazil

This paper aims at exploring how some factors identified in the PSS and product/service innovation literature can hinder or foster sustainable PSS implementation in developing countries, since there is a lack of knowledge concerning the characteristics of PSS transition processes in different contexts. The identified factors were investigated empirically, through two PSS solutions located in an emerging economy. The main results demonstrated the role of some potential factors in supporting the implementation and diffusion of PSS solutions, especially those related to the involvement of multiple actors in the value creation and the social embeddedness. However, the role of those factors still need to be investigated in future works, since only two cases were analyzed in this research. Analyses of successful and unsuccessful PSS cases as well as the identification of other factors and characteristics of PSS implementation in different contexts are directions for further research.

关键词： product-service systems PSS sustainability developing countries.

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COVID-19 pandemic exacerbated food insecurity in South American countries

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Food Security 2025年 1-22页

作者： Vasconcelos-Neto, Carlos Frederico A. Jacob, Michelle Tregidgo, Daniel Valle, Denis El Bizri, Hani R. Gomes, Sávio Marcelino Fa, Julia E. Morcatty, Thais Q. Monteiro, Frederico Ozanan Barros Scofield, Alessandra Matte, Alessandra Chaves, Willandia A. Borges, Luiz Henrique Medeiros Silva, Antônia I. A. Santos-Fita, Dídac Silva, Tiago Lucena Lopes-Filho, Isaac Ibernon Silva, Maria Isabel Afonso Barreto, Rebeca Mascarenhas Fonseca Oliveira, Marcela A Ferreira, Felipe Silva Santos, Ricardo Rodrigues Honorato-Júnior, Jaime Brazil, Marilene Vasconcelos Silva Sousa, Shirliane Araújo Oliveira, Deise C. L. Ferreira, Valéria R. F. Soares, Hyago K. L. Pinto, Marcia F. Beltrão-Mendes, Raone Rodrigues, Marcos Paulo Lopes Rocha, Wáldima Alves Gutiérrez Poblete, Roberto Schettini, Francisco Luigi Rojas, Joe S. S. Aspilcueta, Marco A. Zevallos, Justo D. V. Gagliardi-Urrutia, Giussepe Menéndez Delgado, Erick Rodolfo Polit-Vera, Mariela Lissette Rodríguez Ríos, Elvira Carrascal Velásquez, Juan Carlos Forlano Riera, Maria Dalila Perera Romero, Lucy Salas Dueñas, Danilo A. Garin, Daniel Mayor, Pedro Sanitat i Anatomia Animals Facultad Veterinaria Universitat Autònoma de Barcelona Campus UAB S/N Bellaterra Barcelona 08640 Spain Instituto de Desenvolvimento Sustentável Mamirauá GP Ecologia de Vertebrados Terrestres Estrada do Bexiga Amazonas Tefé 258469553 - 225 Brazil Departamento de Saúde Coletiva e Nutrição Centro de Ciências da Saúde Universidade Federal do Rio Grande do Norte Lagoa Nova Rio Grande do Norte Natal 59075000 Brazil University of Florida Gainesville 32611 FL United States School of Science Engineering and Environment University of Salford 43 Crescent Salford M5 4 WT United Kingdom Department of Nutrition Centre of Health Sciences Universidade Federal da Paraíba R. Tabeliao Estanislau Eloy S/N Paraiba João Pessoa 58050585 Brazil Natural Sciences Faculty of Science and Engineering Manchester Metropolitan University Chester Street Manchester M15 6BH United Kingdom Department of Geography University College London North West Wing Gower Street London WC1E 6BT United Kingdom Institute of Health and Animal Production Federal Rural University of the Amazon Av. Presidente Tancredo Neves 2501 Pará Belém 66077 - 830 Brazil Laboratory of Animal Health Postgraduate Program in Animal Health in the Amazon Institute of Veterinary Medicine Federal University of Pará Universidade Federal do Pará (UFPA) BR 316 Km 61 s/n bairro Saudade II Pará Castanhal 68746360 Brazil Programa de Pós-Graduação Em Agroecossistemas (PPGSI) Universidade Tecnológica Federal Do Paraná (UTFPR) Prolongamento da Rua Cerejeiras S/N Paraná Santa Helena 85892000 Brazil Department of Fish and Wildlife Conservation Virginia Polytechnic Institute and State University 310 West Campus Drive Blacksburg 24061 VA United States Associação SOS Amazônia Rua Pará 61 Acre Rio Branco 69905082 Brazil Universidade Federal do Amazonas Instituto Natureza e Cultura Rua 1º de Maio 5 bairro Colônia Amazonas Benjamin Constant 69630000 Brazil Antropología Social y Cult

The COVID-19 pandemic triggered unparalleled political, economic, and social ramifications, exacerbating global food insecurity (FI). To understand the overall impact of the pandemic and how different socio-economic groups were affected, we assessed prevalence and severity of FI in a sample of 18,997 households across seven countries in South America. We employed the Food Insecurity Experience Scale developed by the FAO. Our results showed that pre-pandemic, 4.5% of the sampled population across the entire continent faced Moderate FI, while 0.6% experienced severe FI. During the pandemic, Moderate FI increased to 16.9% (+ 12.4%), and Severe FI to 2.7% (+ 2.1%). By country, pre-pandemic households in Venezuela had the highest prevalence of Moderate FI (9.7%), with Peru experiencing the highest Severe FI frequency (1.1%). Peru had the greatest rise in Moderate (+ 23.9%) and Severe FI (+ 4.6%) during the pandemic. Low-income households, defined as those earning < 2 minimum wages per month, were most susceptible to FI. Uruguayan low-income families exhibited the most significant rise (+ 40.4%) in Moderate FI, while those in Peru experienced an increase of + 9.1% in Severe FI. This study measures the profound and far-reaching impact of the COVID-19 pandemic on FI in South America. Our findings also emphasise the critical importance of implementing effective public policy interventions to improve resilience against future shocks. This would enable policymakers to develop targeted strategies that address the immediate challenges posed by pandemics as well as laying the groundwork for a more resilient and sustainable food security landscape in the region. © The Author(s) 2025.

关键词： Covid-19 Food security Hunger Nutrition South America

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Biological responses of fibroblasts and osteoblasts on modified bioactive titanium implant surfaces

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Clinical Oral Implants Research 2018年第S17期29卷

作者： Beatriz Ferreira Mariana Cruz Gabriella Peñarrieta-Juanito Joana Marques Filipe Silva João Caramês Júlio Souza Ricardo Magini Mafalda Costa Georgina Miranda António Mata Faculty of Dental Medicine Universidade de Lisboa Portugal Center for Research on Dental Implants Post-graduate program in dentistry (PPGO) School of Dentistry Federal University of Santa Catarina (UFSC) Brazil Oral Biology and Biochemistry Research Group LIBPhys Faculty of Dental Medicine University of Lisbon Portugal Center for Microelectromechanical Systems (CMEMS) Dept. of Mechanical Engineering University of Minho Portugal Bone Physiology Research Group LIBPhys Faculty of Dental Medicine University of Lisbon Portugal Center for Research on Dental Implants Post-graduate program in dentistry (PPGO) School of Dentistry Federal University of Santa Catarina (UFSC) Portugal

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Human osteoblast and fibroblast behavior on modified zirconia implant surfaces

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Clinical Oral Implants Research 2018年第S17期29卷

作者： Mariana Cruz Joana Marques Gabriella Peñarrieta-Juanito Filipe Silva António Mata Mafalda Costa Georgina Miranda Júlio Souza Ricardo Magini Silvio Mario Meloni João Caramês Faculty of Dental Medicine Universidade de Lisboa Portugal Oral Biology and Biochemistry Research Group LIBPhys Faculty of Dental Medicine University of Lisbon Portugal Center for Research on Dental Implants Post-graduate program in dentistry (PPGO) School of Dentistry Federal University of Santa Catarina (UFSC) Brazil Center for Microelectromechanical Systems (CMEMS) Dept. of Mechanical Engineering University of Minho Portugal Center for Research on Dental Implants Post-graduate program in dentistry (PPGO) School of Dentistry Federal University of Santa Catarina (UFSC) Portugal NA Italy Faculty of Dental Medicine University of Lisbon Portugal

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