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- Aproveitamento de energia excedente em usinas fotovoltaicas: comparação de eficiência entre soluções de armazenamento em bateria e hidrogênio verdePublication . Horn, Beatriz Souza; Brito, Paulo; Soares, OrlandoNo dimensionamento de usinas fotovoltaicas, é comum o sobredimensionamento de módulos DC em relação à potência nominal AC do inversor, o que pode gerar perdas por clipping em alta irradiância. Para aproveitar a energia excedente, soluções de armazenamento são buscadas, sendo as baterias as mais utilizadas. Entretanto, o hidrogênio verde, produzido por eletrólise da água a partir de fontes renováveis, surge como alternativa viável. O objetivo do trabalho é comparar a eficiência de baterias e do hidrogênio verde, ao longo de 25 anos, no armazenamento da energia excedente.
- Energy efficiency assessment of a youth hostel based on multizone modeling and simulationPublication . Monteiro, Délcio; Soares, OrlandoThe building sector is a major contributor to global energy use and greenhouse-gas emissions, so energy efficiency is a key goal of EU and national climate policies. The EU’s Energy Performance of Buildings Directive (EPBD) provides a framework for evaluating and improving building energy performance. Dynamic multizone simulation tools play an important role by modeling realistic building conditions such as thermal zones, internal loads, and HVAC operation to predict heating, cooling, and overall energy needs.
- Hormigón con tierra de diatomeas calcinadas gastadas como material de reemplazo: análisis experimental y estadístico a largo plazoPublication . Magalhães, Leandro; Ferreira, Débora; Gavilán, AnaEstainvestigacióndoctoralexploralaaplicacióndetierradediatomeascalcinadasgastadas(SCDE),unsubproductodelafiltracióndelvino,tratadastérmicamentea700°Cparaeliminarelcontenidoorgánico,comoreemplazoparcialdelcementoolaarenaenelhormigón.Elestudioincluyeunanálisispreliminardereemplazosdelcementoquevandel5%al10%yreemplazosdelaarenadel2,5%al15%,evaluandosusefectossobrelatrabajabilidad,ladensidadylaresistenciaalacompresiónalos7y28días.Elprogramadeensayossecentraentrescomposicionesclave:elhormigóndereferenciaylasmezclasóptimasconun10%dereemplazodelcementoyun5%dereemplazodelaarena.Laspruebasderesistenciaalacompresiónserealizanalos7,28,90,180y360días.ElaltocontenidodesíliceenlaSCDEcontribuyealaformacióndehidratosdesilicatocálcicoadicionalesduranteelprocesodehidratación,loquemejoralaresistenciamecánicaconeltiempo.Losresultados,validadosmedianteANOVA,demuestranlainfluenciadelSCDEenlaresistenciadelhormigónalolargodeltiempo,conpatronesdecomportamientodistintivosidentificadosparadiferentesmezclas.Laresistenciadelhormigónconreemplazosecorrelacionaconlaresistenciadereferencia,conunfactormultiplicadorquevaríaentrelos7ylos90díasyluegoseestabiliza.CuandoelSCDEsustituyealcemento,elfactoresinferioraunoantesdelos28díasdebidoalalentareacciónpuzolánica,mientrasque,enelcasodelasustitucióndearena,siempresuperaelunodebidoalefectorellenoinicial.Despuésde90días,losfactoresmultiplicativosderesistenciason1,13paralasustitucióndecementoy1,30paralasustitucióndearena,loquedemuestraelpotencialdelSCDEparalafabricaciónsostenibledehormigónysuimpactopositivoalargoplazoenelrendimientomecánico.
- Los números del envejecimiento demográfico en PortugalPublication . Praça, Lídia GalvãoLa población mundial está envejeciendo y todos los países del mundo están presenciando un aumento en el número y proporción de personas mayores en su población El número de personas de 60 años o más está creciendo más rápido que todos los grupos de edad más jóvenes, un fenómeno conocido como envejecimiento demográfico Este fenómeno, aunque generalizado, se produce a diferentes ritmos, según la región del globo Por ejemplo, Europa tiene el mayor porcentaje de población de 60 años o más 25 según informes elaborados por la ONU También se pueden encontrar divergencias en los valores cuando el análisis se hace por países.
- A proposal to understand the perception of trying insect-based foodPublication . Martins, Oliva M.D.; Bastos, Adriana de Fatima Valente; Coelho, Ana Sofia; Nutu, Oana; Simion, Violeta-Elena Violeta; Bucea-Manea-Țoniș, Rocsana; Beck, CeresThe perspective of the world population growth, with an estimate of more than nine billion people by 2050 (UN, 2022), associated with environmental concerns, gives a singular combination able to create many future problems about humans and animals’ food supply. Recognizing that the available protein sources influence negatively the surrounding environment, it is crucial to reflect on safety food alternatives for the future of humanity. A protein can be of animal or vegetable origin, but the animal proteins have more impact on the environment (Lucchese-Cheung et al., 2020). The perverse effects of animal production on the environment can drive us to assume that the supply of this protein will be insufficient to meet the future global demand, which will favor increasing the price of meat. In this sense, it is urgent to find sustainable and accessible alternatives for future food and feeding to replace or complement the current sources of animal protein. So, edible insects could be considered as a viable and sustainable solution. This research aims to explore variables, agents, and barriers that influence insect-based food experimentation, proposing a project based on three phases of research: qualitative, quantitative, and experimental (sensorial perception). Assuming that sequential qualitative-quantitative is an adequate methodology (Steckler at al., 1992), the project intends also to develop experimental (sensorial) research, using experiencing influencing factors, such as: state of matter (liquid such as smooth, yogurt, juice, ice cream etc.; or solid, such as cereal bar, sweets, cooking, flour etc.); temperature (ambient temperature, hot, cold, etc.); vision (quantity, distribution, color, appearance, etc.); smell (mild/intense, pleasant/unfriendly, etc.); touch (thick/low consistent, solid/liquid, etc.). Changing food behavior, however, is a complex task, which involves perception, individual and social beliefs, as well as cognitive aspects of influence on decision making. Regarding food preferences, social pressure plays an important role (Ferreira et al., 2011) linked to local food traditions and cultural practices (Cicatiello et al., 2020). Furthermore, social beliefs are a form of social pressure, while individual beliefs reinforce attitudes (Fishbein & Ajzen, 1975). Also, friends, colleagues, or family recommendations can influence intention regarding trying insect-based food. Familiarity with food (Alhujaili, Nocella & Macready, 2023) and preparation (House, 2016), as well as the methods and ingredients (Hartmann et al., 2015), are important factors of influence. Finally, individual, social, and environmental benefits and risks can influence individuals to try insect-based food (Lange & Nakamura, 2021). In this regard, to modify individual behavior, it is possible to identify structural barriers in the environment, as well as agents, variables (factors) and respective relationship of influence (model of interaction) that can be used by Social Marketing to educate consumers and teach them to try alternative foods
- Can Scopus AI help to understand e-cigarette experimentation?Publication . Ravara, Sofia; Cruz, Carla Dias Marques da; Cunha Filho, Hilson; Martins, Oliva M.D.According to the most recent data from the 5th National Survey on the Consumption of Psychoactive Substances in the General Population, Portugal (SICAD, 2022), tobacco consumption remains relatively high. Consumption is lower among young people (15-24 years old) and in the older age groups, 65 and over. According to the same report, experimentation happens even earlier, around the age of 16, in both sexes. And 96 per cent report low motivation to quit. There is an upward trend in experimentation with new products (e-cigarettes and heated tobacco) among young people aged between 13 and 18 (Lavado and Calado, 2020; SICAD, 2023, preliminary data). The risk of addiction depends on several factors, especially the young age of experimentation and the intensity of use of nicotine-based products. Considering that there is safe and effective treatment for quitting, and with a view to counselling society in general, the Portuguese Society of Pneumonology has launched a campaign on the two leading social networks: Facebook and Instagram. Associated with World No Tobacco Day 2024, the campaign ran between 24/05/2024 and 31/05/2024 and reached 5140 people on Facebook and 18437 people on Instagram. The second campaign was associated with European Ex-Smokers' Day 2024, ran between 23/09/2024 and 28/09/2024, and reached 6102 people on Facebook and 11155 on Instagram. These results are considered insufficient. However, they may also represent a lack of interest in this type of information, especially for young people. With so much information, why are young people still experimenting? Aiming to understand the factors that lead young people to experiment with electronic cigarettes, a search was conducted using Scopus AI to explore the main articles indexed in this database. The objective is to identify variables, indicators, and respective relationships to find a model. In other words, to identify significant factors that can be used by social marketing to describe, explain, and predict desired behavior.
- Demand and supply of outdoor tourism activities in Northern Portugal: a survey-based approachPublication . Ferreira, Fernanda A.; Fernandes, Paula Odete; Santos, Eleonora; Correia, Alexandra I.; Nunes, Alcina; Veloso, Cláudia M.; Vieira, Elvira Pacheco; Silva, Goretti; Fonseca, Manuel José; Carrança, Paulo; Rachão, SusanaThis paper focuses on the North of Portugal, as a diversified region with unique natural resources, to create information regarding both resources and equipment and business dynamics; the evolution of tourism supply and demand.
- Monitoring of outdoor tourism demandPublication . Martins, Oliva M.D.; Nunes, Alcina; Ferreira, Fernanda A.; Veloso, Cláudia M.; Santos, Sónia; Correia, Alexandra I.; Fonseca, Manuel José; Silva, Goretti; Rachão, Susana; Vieira, Elvira Pacheco; Carrança, Paulo; Fernandes, Paula OdeteThe Herfindahl-Hirschman Index (HHI) was used in order to understand the tourism competitiveness of the different sub-regions that make up the North Region of Portugal. This index is a measure which helps to analyse market concentration and at the same time determines the competitiveness of the market.
- Utilização de aplicativos m-health na oncologia: uma revisão sistemáticaPublication . Martins, Danilo M.D.; Lima, Laíres; Vaz, Clara B.; Pereira, Ana I.O presente trabalho consiste em uma revisão sistemática de literatura acerca de estudos recentes sobre aplicativos móveis relacionados com saúde (m-health) na prática clínica de doenças oncológicas para catalogação das principais características dos aplicativos desenvolvidos.
- Fire protection durability of intumescent coatings after accelerated agingPublication . Thabet, R.; Benarous, Abdallah; Mesquita, L.M.R.Intumescent coating is a reactive chemical material, which is used as the main fire protection material to steel structures. When intumescent coating is exposed to fire, the chemical components in the intumescent coating react to cause the coating to swell forming a lightweight flame-retardant char to protect the steel substrate from excessive rise in temperature. However, exposure to long-term environmental conditions can cause the intumescent coating to lose some of the reactive materials, thus reducing the effectiveness of the intumescent coating over time. Because fire safety requirement is throughout the entire life of a building structure, which may last many tens of years, it is important to understand the long-term protection performance of intumescent coating under exposure to environmental conditions, [1].