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- Driving tourism development: multicriteria decision-making in Rio de Janeiro’s tourism sectorPublication . Ferreira, Fernanda A.; Coutinho, José Augusto da Fonseca Pinto; Gomes, Carlos Francisco Simões; Santos, Marcos dosAs operations stabilized after the onset of the Covid-19 pandemic, many economic sectors have gradually resumed activities, with some nearing pre-pandemic levels. Tourism is no exception, as it continues to be used as a source of resource acquisition and socioeconomic development. The purpose of this study is to promote the development of the tourism sector in the municipality of Rio de Janeiro by applying the Analytic Hierarchy Process (AHP) and AHP-Gaussian (AHP-G) multicriteria analysis methods to support potential public and/or private investments in tourism. The findings of this study will help a travel agency make a strategic decision about where to open a new branch, taking into account the sector’s potential in Rio de Janeiro. The study found that São Conrado and Ipanema are ideal neighbourhoods for establishing a new travel agency branch. Furthermore, the methodology used in this study can be used as a guideline for other organizations in the field looking to undertake similar evaluations, providing a structured approach to decision-making and investment evaluation.
- Sequential move model for quantity and quality competition in the restaurant industryPublication . Ferreira, Flávio; Koerich, GuilhermeThis paper examines a competition in both quality and quantity between two asymmetric restaurants. The model that we consider is a Stackelberg duopoly on quantities (sequential decision-making), after a simultaneous choice of quality. Our findings indicate that the restaurant with the best reputation provides a greater variety of higher-quality food compared to its competitor. We also examine how variations in restaurants’ reputations impact market equilibrium outcomes. We demonstrate that an increase in the reputation gap between restaurants boosts the profits of both estab lishments, enhances consumer surplus, and improves social welfare. Additionally, in comparison to the scenario under the Cournot model (simultaneous decision making), small restaurant’s profits are lower under Stackelberg model, while the opposite holds for the large restaurant’s profits and for social welfare.
- Gold Single Atom Doped Defective Nanoporous Copper Octahedrons for Electrocatalytic Reduction of Carbon Dioxide to EthylenePublication . Zhao, Yang; Wang, Yanan; Yu, Zhipeng; Song, Chao; Wang, Jingwei; Huang, Haoliang; Meng, Lijian; Liu, Miao; Liu, LifengElectrocatalytic CO2 reduction into high-value multicarbon products offers a sustainable approach to closing the anthropogenic carbon cycle and contributing to carbon neutrality, particularly when renewable electricity is used to power the reaction. However, the lack of efficient and durable electrocatalysts with high selectivity for multicarbons severely hinders the practical application of this promising technology. Herein, a nanoporous defective Au1Cu single-atom alloy (DeAu1Cu SAA) catalyst is developed through facile low-temperature thermal reduction in hydrogen and a subsequent dealloying process, which shows high selectivity toward ethylene (C2H4), with a Faradaic efficiency of 52% at the current density of 252 mA cm−2 under a potential of −1.1 V versus reversible hydrogen electrode (RHE). In situ spectroscopy measurements and density functional theory (DFT) calculations reveal that the high C2H4 product selectivity results from the synergistic effect between Au single atoms and defective Cu sites on the surface of catalysts, where Au single atoms promote *CO generation and Cu defects stabilize the key intermediate *OCCO, which altogether enhances C−C coupling kinetics. This work provides important insights into the catalyst design for electrochemical CO2 reduction to multicarbon products.
- Ir Nanoparticles Synergistically Regulated by B, N Co-Doping in Carbon for pH-Universal Bifunctional Electrocatalysts towards Energy-Efficient Hydrogen ProductionPublication . Huang, Hongli; Meng, Lijian; li, Haibo; Li, Rui; Zeng, Suyuan; Yao, Qingxia; Chen, Hongyan; Qu, Kong-GangThe ultralow-potential hydrazine oxidation reaction (HzOR) can be integrated with hydrogen evolution reaction (HER) to construct the overall hydrazine splitting (OHzS) system, thus realizing energy-saving hydrogen production. Meanwhile, the real electrocatalytic processes normally involve the constantly changed pH and also need to operate under different pH conditions. Therefore, designing advanced pH-universal electrocatalysts with high compatibility for HER and HzOR is of greatly practical significance. Herein, ultrafine Ir nanoparticles embedding in B, N-codoped carbon (Ir/BNC) were facilely synthesized with one Ir-based complex and boric acid by simple mixing and pyrolysis. To reach the current density of 10 mA cm−2, the bifunctional Ir/BNC merely demands the low potentials of −4.8/-6.3/-38.5 mV for HER, 7.5/157.8/330.1 mV for HzOR, and 19/236/358 mV for OHzS in the alkaline, neutral and acidic electrolytes, respectively, all greatly outperforming commercial Pt/C and displaying the huge energy-saving advantage for pH-universal hydrogen generation over the conventional water splitting. Underlyingly, the codoping of abundant B and N heteroatoms with different electronic modulation effects can play synergistical roles to Ir active sites, endowing with the pH-universal multifunctionality as well as the boosted intrinsic unit activity. Additionally, the large surface area, rich pores and highly graphitized carbon also collectively ensure the remarkable apparent performance for bifunctional HER and HzOR. This work supplies a promising strategy for exploiting pH-universal HER and HzOR bifunctional electrocatalysts, greatly potential to the practical energy-efficient hydrogen generation.
- Optical immunosensor panel using quantum dot-antibody conjugates for highly sensitive detection of carbohydrate antigen 19–9 (CA19-9)Publication . Oliveira, Daniela; Oliveira, Pedro; Xu, Ana; Rodrigues, Eduarda; Guerreiro, Susana G.; Castro, Rafael C.; Ribeiro, David S. M.; Santos, João L. M.; Piloto, Ana Margarida L.This study introduces a fluorescent immunosensor colour panel with antibody-conjugated quantum dots for detecting CA19-9 in human serum. The immunosensors presented decreasing fluorescence with increasing CA19-9 concentrations, with a linear detection range from 0.01 to 501.87 U mL−1 and detection limits of 1.66 × 10⁻⁴, 2.71 × 10⁻⁴, and 5.45 × 10⁻⁴ U mL−1 for the green-, orange-, and red-emitting conjugates in human serum. These limits are well below the 37 U mL−1 cutoff for early pancreatic cancer risk. The immunosensor panel is simple, sensitive, and specific, offering a visual colour readout for rapid CA19-9 detection, making it ideal for point-of-care applications. The results highlight the potential of the developed conjugates as a sensitive fluorescence colour panel for detecting CA19-9 across a wide range in human serum, both below and above the pancreatic cancer cutoff. With just 200 μL of sample and a single pre-filtration step, the assay delivers results in under 15 min, offering a cost-effective and efficient platform for point-of-care use.
- Engineering a Sustainable Future with EPS@ISEPPublication . Malheiro, Benedita; Guedes, Pedro; Leal Filho, Walter; Gasparetto Rebelatto, Bianca; Annelin, Alice; Boström, Gert-OlofThe challenge of engineering education is to transform engineering students into agents of innovation and well-being. In addition to solid scientific and technical knowledge, critical thinking, problem-solving and interpersonal competencies, it implies the ability to design and implement solutions supported by ethical and sustainability principles. With this goal in mind, the European Project Semester (EPS) provides a student-centred project-based learning framework. It is offered by a group of European higher education institutions, including the Instituto Superior de Engenharia do Porto (ISEP), the engineering school of the Polytechnic of Porto. Students work in teams of four to six, from different fields of study and nationalities, to design solutions to problems that affect individuals, society or the planet, taking into account the state of the art, the market and the ethical and sustainability implications of their decisions. These solutions are then implemented in a proof-of-concept prototype. Most of the projects address problems in education, the environment, food production and smart cities and have a strong educational, ethical and sustainability drive, encouraging students to develop sustainability competencies. This work analyses team papers of illustrative EPS@ISEP projects searching for evidences of the development of sustainability competencies. The proposed method maps keywords related to the sixteen United Nations Sustainable Development Goals to the contents of team papers by applying natural language processing and reusing the list of SDG keywords proposed by Auckland University. The results confirm EPS@ISEP fosters sustainability competencies in engineering undergraduates.
- Moving toward sustainability and circular economy in the restaurant industryPublication . Melo, António; Azevedo, Daniel; Silva, Susana; Silva, Goretti; Maia, Beatriz; Camões, Henrique; Barreto Salgueiro de Melo, Carla IsabelThe United Nations 2030 Agenda emphasizes reducing food waste through responsible consumption and production. The concept and principles of Circular Economy (CE) propose rethinking the entire food chain to minimize environmental impact. This chapter aims to characterize the adoption and implementation level of CE dimensions by restaurants in specified regions of Portugal. An exploratory quantitative study was performed through an online survey, with responses from 304 restaurants. Descriptive data analysis was performed with IBM SPSS 28.0. Key findings include significant food and beverage management practices, such as root-to-stem utilization and effective portion control. However, less emphasis is placed on practices like donating surplus food and promoting vegetarian options. Waste management practices, particularly waste separation, are widely adopted; however, energy and water-saving measures are lagging. The main conclusions highlight the need for increasing awareness, supportive governance, and investment in infrastructures to enhance CE adoption by restaurants and the food service industry. The results also advocate for collaborative efforts among stakeholders to overcome barriers and promote sustainable practices in the restaurant sector.
- Attraction and retention strategies: what matters to the millennial?Publication . Silva, Susana; Martins, Dora; Marques, AureaThe labour market is suffering many changes and transformations putting several challenges to human resources management. One of the biggest challenges is related to the attraction and retention of employees to work in several activity sectors and to retain the talent in the organisations. In particular, hospitality and technology sectors have seen robust growth since the pandemic-induced. This study aims to explore the strategies for attracting and retaining millennials. More specifically, to understand the challenges of multigenerational management, and to understand the strategies used by organisations to meet the needs and interests of the millennial generation. A qualitative exploratory study was conducted using a semi-structured interview with 17 Human resources managers. Data were analysed according to thematic analysis procedures. The results showed that university partnerships are the preferred practice for attracting millennials, work-life balance, benefits, organisational culture, investment in professional development, feedback, and recognition are the main attraction and retention strategies. Participants consider the millennial Generation to be committed, and the biggest challenge in managing generational diversity is linked to the demand and impatience of millennials. In conclusion, human resources managers should consider the generation characteristics to adequate and update their human resources practices.
- Exploring intercultural adjustment of self-initiated expatriates: a study of brazilians in PortugalPublication . Martins, Dora; Silva, Susana; Silva, QuérenSelf-initiated expatriation is a widespread phenomenon that has gained limited attention, in particular related to some countries and industries. Recent literature indicates that the hospitality industry is looking for talent beyond national boundaries. The main goal of this study is to understand the experiences of Brazilian self-initiated expatriates (SIEs) residing in Portugal. We are studying how individuals adjust to the job market and Portuguese society, to identify factors that help or hinder their integration into a country known as “sister nations”. The methodology employed in this study involved a qualitative approach to comprehensively investigate the experiences of Brazilian SIEs living in Portugal. A semi-structured interview script was administered to the participants, focusing on their perceptions of cultural adjustment in the country. The findings of this research indicate that adapting to the intercultural environment in Portugal can be quite difficult in terms of professional development. Building social connections and being part of the SIE communities is crucial for a smooth transition and integration into the country. The perception of acceptance by the local community varies, with some individuals reporting positive experiences while others encounter prejudice and discrimination. Participants mentioned that the main challenge in finding work in Portugal is the recognition of degrees in certain fields of study. The final section outlines the study’s limitations and suggests future research directions, with a specific focus on SIEs in Portugal.
- Arte e cultura como elementos de valorização do Bairro do LagarteiroPublication . Magalhães, Andreia Filipa da Silva; Veludo, Sérgio; Lambert, FátimaEsta dissertação parte de uma reflexão sobre o potencial da cultura e da arte como instrumentos para impulsionar e valorizar a comunidade do Bairro do Lagarteiro, focando-se no impacto das atividades culturais na transformação social e comunitária. Face à necessidade de uma abordagem mais agregadora, optou-se por analisar o quadro das políticas culturais em Portugal e os seus programas, nomeadamente aqueles que, através da arte e da cultura, trabalham para a inclusão das comunidades. Por outro lado, sustentámos a hipótese de que a concretização de um projeto inclusivo de arte urbana poderia constituir um caminho para desconstruir estereótipos e promover um sentimento de pertença e valorização da comunidade do Bairro do Lagarteiro. Propõe-se, na etapa final desta investigação, o projeto Iniciativa Bairro Criativo, no âmbito do Cercar-te no Lagarteiro – E9G. Esta proposta surge na sequência de uma pesquisa inicial sobre os projetos atualmente em curso no bairro, tendo identificado o Cercar-te no Lagarteiro – E9G, como um projeto significativo, implementado pelo Espaço T. Foi possível acompanhar o projeto desde novembro de 2024 até ao presente momento, o que nos permitiu obter um conhecimento mais empírico das suas dinâmicas. A partir desse acompanhamento, surgiu a ideia de apresentar uma proposta a enquadrar no Cercar-te, tendo por principal objetivo a valorização do Bairro do Lagarteiro através da arte urbana. Ao encorajar a participação ativa da comunidade, pretendemos valorizar a comunidade local, assim construindo uma narrativa mais positiva e inclusiva do bairro. Com esta proposta espera-se transformar o espaço urbano num ambiente de convivência e expressão cultural e artística, estimulando o orgulho e o sentimento de pertença e identidade entre os moradores.