123 documents found, page 1 of 13
Designing a Multicriteria WebGIS-Based Pre-Diagnosis Tool for Indoor Radon Pote...
Nunes, Leonel; Curado, António; Azevedo, Rolando; Silva, Joaquim P.; Lopes, Nuno; Lopes, Sérgio IvanRadon (222Rn) is a well-known source of indoor air contamination since in its gaseous form it is a reported source of ionizing radiation that belongs to the group of rare gases. Radon occurs naturally in soils and rocks and results from the radioactive decay of its longer-lived progenitors, i.e., radium, uranium, and thorium. Radon releases itself from the soil and rocks, which mainly occurs in outdoor environm...
A pre-diagnosis model for radon potential evaluation in buildings: A tool for b...
Silva, Joaquim; Lopes, Nuno; Curado, António; Nunes, Leonel J R; Lopes, Sérgio IvanIn a very early stage of implementation of a comprehensive experimental campaign for indoor radon assessment, a pre-evaluation selection of the variables that play a leading role in influencing expected results must be insightfully assessed, by stimulating compatibility between Indoor Air Quality (IAQ) and energy efficiency. Hence, a practical methodology for variable selection based on an analysis of historic ...
Towards Indoor Radon Analytics: An OLAP-based Multidimensional Approach
Azevedo, Rolando; Silva, Joaquim P.; Lopes, Nuno; Curado, António; Nunes, Leonel J R; Lopes, Sérgio IvanIndoor radon represents a known hazard to public health, namely, its relationship with lung cancer. The adoption of data analytics tools for indoor radon human exposure risk assessment is crucial for building management decision-making and is a fundamental requirement for the implementation of remediation measures. This work presents the implementation of a data warehouse and an OLAP cube as components of a mor...
Designing an IoT-enabled Data Warehouse for Indoor Radon Time Series Analytics
Azevedo, Rolando; Silva, Joaquim P.; Lopes, Nuno; Curado, António; Nunes, Leonel J R; Lopes, Sérgio IRecently we have seen an increase in the frequency of radon concentration measurement campaigns, largely driven by directives adopted at a European level, and by increased public awareness of the problem. Many of the conducted assessments are simple concentration averages over a time range, where passive sensors are mostly used. Other assessments use portable devices that measure radon in a continuous mode, whi...
Indoor Radon Remediation in Highly Constrained Built Environments: Balancing In...
Curado, António; Nunes, Leonel J R; Silva, Joaquim P; Lopes, Nuno; Azevedo, Rolando; Lopes, Sérgio IvanEnergy Efficiency (EE) and Indoor Air Quality (IAQ) are mandatory features in the rehabilitation of historical buildings. Even though it is challenging to manage both sides, EE demands are fundamental to increasing buildings´ thermal comfort, and IAQ requirements are essential for improving occupants’ wellness. There are, however, several constraints that limit the intervention in complex buildings, such as the...
A Pre-Diagnosis Model for Indoor Radon Potential Assessment
Meneses, Paulo; Lopes, Nuno; Leite, Patrícia; Texeira, Paulo; Gonçalves, Joaquim; Silva, joaquim PIndoor radon is a well-known public health threat. WHO estimates radon causes between 3-14% of all lung cancers and has issued many recommendations to encourage countries to act against the exposure to radon and associated cancer risks. However, many people continue to be unaware about radon health risk. In previous works we developed a prediagnosis approach to evaluate the radon potential in indoor environment...
CITIZEN SCIENCE PLATFORM FOR RADON POTENTIAL ASSESSMENT AND RADON RISK AWARENESS
Meneses, Paulo; Lopes, Nuno; Leite, Patrícia; Teixeira, Paulo; Silva, Joaquim P.The WHO estimates that cancers caused by radon gas may account for 14% of all lung cancers. The concentration of indoor radon gas is a well-known public health threat and has been the subject of many scientific studies. The WHO has issued recommendations to encourage countries to act against radon exposure to reduce the associated cancer risks. However, despite the vast knowledge on this subject, the measures a...
Designing a qualitative pre-diagnosis model for the evaluation of radon potenti...
Silva, Joaquim P.; Lopes, Nuno; Curado, António; Nunes, Leonel J R; Lopes, Sérgio IIn a very early stage of implementation of a comprehensive experimental campaign for indoor radon assessment, a pre-evaluation selection of the variables that play a leading role in influencing expected results must be insightfully assessed. Hence, a practical methodology for variable selection based on an analysis of historic data plays a key role concerning radon potential assessment. Given the circumstances,...
Assessing tumour-associated macrophage phenotype and glycan signatures in breas...
Lopes, Nuno"Breast cancer (BC) remains the cancer type with highest incidence in women, being the leading cause of cancer-related mortality. Among all subtypes, triple negative BC (TNBC) presents the worst prognosis, with the highest rates for recurrence and progression. Despite the dire scenario for TNBC, scarce therapeutic options are available, relying primarily on chemotherapy. In past years, the immune microenvironme...
Bending resistance of austenitic stainless steel hollow sections at elevated te...
Piloto, P.A.G.; Mesquita, L.M.R.; Cruz, Áureo A.T.; Lopes, Nuno; Arrais, Flávio; Real, Paulo VilaThe present research aims to increase the knowledge of the structural behaviour of stainless steel members under fire. Eight experimental bending tests at elevated temperatures (500, 700 ºC) built with RHS 150×100×3 austenitic stainless-steel beams, using two different grades (1.4301, 1.4571) also known as 304 and 316Ti, are presented. Both grades 1.4301 (X5CrNi18–10) and 1.4571 (X6CrNiMo17–12–2) have almost th...