99 documents found, page 1 of 10
Pedestrian crossing behavior in social groups: Exploring cultural contexts thro...
Acela, Leidy Marcela Barón; Sousa, Emanuel; Faria, Susana; Almeida, Raul; Freitas, E. F.Walking is a common mode of transportation that offers numerous benefits. However, pedestrians are vulnerable road users and account for a significant number of traffic accidents worldwide. Characterizing pedestrian behavior is crucial for enhancing safety and comfort. Several factors influence pedestrian behavior, including personal, situational, social, and cultural aspects. It is essential to consider these ...
Psychophysiological stress response to urban traffic: the effect of speed limit...
Barros, Ablenya; Pereira, Frederico; Rudnicki, Konrad; Van Renterghem, Timothy; Machado, Dario; Kampen, Jarl K.; Decorte, Paulien; Poels, KarolienThe acoustic environment in urban spaces is often dominated by human-made noise sources, with road traffic noise as the most pervasive. Meanwhile, urban planning often overlooks how soundscape can impact citizens' well-being. This study combined virtual reality, biometric sensing, and questionnaires to evaluate how urban design measures targeting road traffic noise affect, beyond acoustic characteristics, psych...
Marcações horizontais termocrómicas: sensores a base de cor para alertar condut...
Lima Jr., Orlando; Rocha Segundo, Iran; Mazzoni, Laura Nascimento; Freitas, E. F.; Carneiro, Joaquim A. O.As condições climatéricas são fatores críticos em acidentes rodoviários. Em situações adversas de gelo ou neve sobre o pavimento, o atrito superficial é significativamente reduzido, diminuindo a segurança rodoviária. Com a finalidade de alertar os condutores sobre a possível presença dessas condições sobre pavimentos betuminosos, este estudo tem como principal objetivo desenvolver Marcações Rodoviárias (MR) uti...
Anti-icing coatings for asphalt mixtures using sprayed hierarchical nano/micro-...
Rocha Segundo, Iran Gomes da; Moreira, Luís; Freitas, E. F.; Lima, Orlando; Kuzminov, Denis; Carneiro, Joaquim A. O.In cold regions, icy roads cause hazards that extend beyond accidents, impacting communities and escalating air pollution during congestions. To reduce the risk of road accidents caused by ice formation on the pavement surface, new coatings have been developed to create superhydrophobic asphalt mixtures to avoid this issue. This study investigated the effect of two successive spraying coatings applied over an a...
Coaxial fibres incorporated with phase change materials for thermoregulation ap...
Hammes, Nathalia; Pinheiro, Claver Giovanni Silveira; Rocha Segundo, Iran Gomes da; Homem, Natália Cândido; Silva, Maria ManuelaNowadays, the growing concern about improving thermal comfort in different structures (textiles, buildings, and pavements, among others) has stimulated research into phase change materials (PCMs). The direct incorporation of PCMs into composite materials can cause mechanical impacts. Therefore, this study focuses on the design of phase change coaxial fibres (PCFs), using commercial cellulose acetate (CA) or rec...
Improving the road safety and the service life of road markings through self-cl...
Júnior, Orlando Sousa Lima; Rocha Segundo, Iran Gomes da; Mazzoni, Laura Nascimento; Freitas, E. F.; Carneiro, Joaquim A. O.Road markings (RM) are effective safety features. However, over the lifetime, dirt particles, oils and greases are adsorbed on the RM surface reducing visibility, decreasing service life, and consequently negatively impacting road safety. The application of self-cleaning abilities to RM can improve service life because they became able to photodegrade these adsorbed pollu-tants on their surface. Thus, in this r...
Avaliação do ciclo de vida de pavimentos betuminosos fotocatalíticos pulverizad...
Margalho, Élida Melo; Gomes, Igor Samuel Peixoto; Rocha Segundo, Iran Gomes da; Castelo Branco, Verônica; Oliveira, Joel R. M.; Carneiro, Joaquim A. O.A poluição atmosférica é um problema que afeta os centros urbanos. Uma abordagem inovadora para mitigar este problema é a utilização de nanopartículas de dióxido de titânio (TiO2) em pavimentos betuminosos. A aplicação do TiO2 confere ao pavimento capacidades fotocatalíticas, permitindo a degradação de poluentes atmosféricos na presença de luz solar. O método de revestimento por pulverização é considerado o mai...
Evaluation of air cleaning through photocatalytic asphalt mixture functionalize...
Margalho, Élida Melo; Gomes, Igor; Júnior, Orlando Sousa Lima; Rocha Segundo, Iran Gomes da; Nunes, Clarisse; Tavares, Carlos José; Freitas, E. F.Controlling atmospheric pollution is a challenge for society. Air pollutants, such as NO and NO2, resulting from the combustion of fuels in the air, can cause acid rain and pose health risks to human beings. Using semiconductor nanoparticles, e.g., TiO2, in Asphalt Mixtures (AM) to photodegrade NOx is a promising alternative for air cleaning in urban cities. Asphalt pavements are ideal materials for that due to...
Evaluation of the mechanical properties of asphalt mixtures modified with coaxi...
Pinheiro, Claver Giovanni Silveira; Hammes, Nathalia; Homem, Natália Cândido; Rocha Segundo, Iran Gomes da; Felgueiras, Helena PradoThis paper presents a mechanical approach to assess the feasibility of utilising Phase Change Material (PCM) embedded within coaxial fibres for mitigating Urban Heat Island effects in asphalt concrete (AC). The fibres, made via wet spinning, consist of a polyethene glycol core surrounded by a cellulose acetate sheath. Using the Response Surface Method (RSM) and the Design of Experiments (DoE), the study investi...
Monitorização atmosférica dos níveis de NO₂ usando a técnica de amostragem passiva
Pinheiro, Claver Giovanni Silveira; Margalho, Élida Melo; Alcantara, Amanda; Júnior, Orlando Sousa Lima; Rocha Segundo, Iran Gomes daA qualidade do ar em áreas urbanas é um problema global que afeta a saúde pública e o meio ambiente e é muito afetada pelo trafego de veículos automóveis. Este estudo avalia a eficácia da amostragem passiva para medir a concentração de dióxido de nitrogênio (NO2) na cidade de Guimarães da região do Minho no noroeste de Portugal. Utilizando filtros de celulose impregnados com uma solução absorvedora, as amostras...