II. Componente Politécnica
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Percorrer II. Componente Politécnica por Objetivos de Desenvolvimento Sustentável (ODS) "11:Cidades e Comunidades Sustentáveis"
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- Air pollution forecasting using autoencoders: a classification-based prediction of NO2, PM10, and SO2 concentrationsPublication . Rodríguez-García, María Inmaculada; Carrasco-García, María Gema; Fernández, Paloma Rocío Cubillas; Ribeiro, Conceição; Cardoso, Pedro; Turias, Ignacio. J.This study aims to evaluate and compare the performance of Autoencoders (AEs) and Sparse Autoencoders (SAEs) in forecasting the next-hour concentration levels of various air pollutants—specifically NO2(t + 1), PM10(t + 1), and SO2(t + 1)—in the Bay of Algeciras, a highly complex region located in southern Spain. Hourly data related to air quality, meteorological conditions, and maritime traffic were collected from 2017 to 2019 across multiple monitoring stations distributed throughout the bay, enabling the analysis of diverse forecasting scenarios. The output variable was segmented into four distinct, non-overlapping quartiles (Q1–Q4) to capture different concentration ranges. AE models demonstrated greater accuracy in predicting moderate pollution levels (Q2 and Q3), whereas SAE models achieved comparable performance at the lower and upper extremes (Q1 and Q4). The results suggest that stacking AE layers with varying degrees of sparsity—culminating in a supervised output layer—can enhance the model’s ability to forecast pollutant concentration indices across all quartiles. Notably, Q4 predictions, representing peak concentrations, benefited from more complex SAE architectures, likely due to the increased difficulty associated with modelling extreme values.
- Innovation and competitiveness in the territorial brand of the Algarve: a comparative analysis of its social media communication and web contentPublication . Cristòfol, Francisco J.; Berraquero-Rodríguez, Diego; Zamarreño-Aramendia, Gorka; Alves, PauloIn an increasingly competitive global tourism context, territorial branding plays a key role in enhancing the visibility, identity, and resilience of regions. This study focuses on the Algarve, a region in southern Portugal, and investigates how innovation and competitiveness are reflected in its digital communication strategy. Using a mixed-methods approach, this research combines the quantitative analysis of 689 social media posts published in 2024 on Facebook, Instagram, and YouTube with the qualitative content analysis of 38 documents and the official website of Algarve. The findings reveal a coherent and visually appealing brand narrative centred on the coastal identity of the Algarve, complemented by content related to nature, gastronomy, and cultural heritage. Instagram stands out as the most engaging platform, particularly when posts adopt a participatory tone, emotional storytelling, and references to specific locations. However, only 6.4% of the content surpassed the 1% engagement threshold, suggesting limited audience connection. The website presents a broader thematic range but under-represents intangible heritage and local products. The Algarve brand successfully projects an aspirational image based on landscape and leisure but would benefit from greater content diversification, enhanced stakeholder integration, and expanded narrative strategies to strengthen digital engagement and destination competitiveness.
- Minute city concept for healthy tourism during the COVID-19 pandemic crisis. who for? The city of Lagos, PortugalPublication . Pires Rosa, Manuela; Lopes, Ana; Aghaeizadeh, Esmaeil; Gomes, André; Andraz, JorgeUrban spatial organization provided an important contribution for healthy tourism in the first COVID-19 pandemic period. The 15-Minute City concept promotes walking which is essential for the development of outdoor activities for a healthier tourism. The tourist city of Lagos (Portugal) is a pilot city of the Interreg Med SuSTowns Project which aims to promote sustainable and resilient territories. This study presents an analysis of the pedestrian accessibility through a specific geographical indicator: the percentage of short-term rentals existing in the surrounding tourist attractions. Ideal standard distances, studied internationally, were considered to assess this close proximity. Different walking speeds were considered to address human diversity and their implications on the 15-Minute City concept. The functionalities of the geographic information systems, in particular the assessment of distances over the pedestrian network were used. The results indicate that in the city of Lagos there is a trend towards an effective 15-Minute City for healthy tourists, promoting walking which could enhance tourism attraction. For tourists with reduced mobility, the use of accessible public transportation is required and needs to be integrated in the 15-Minute City concept.