9 documents found, page 1 of 1
Short-Term Indoor Radon Gas Assessment in Granitic Public Buildings: A Multi-Pa...
Azevedo, Rolando; Silva, Joaquim P.; Lopes, Nuno; Curado, António; Lopes, Sérgio I.Radon is a naturally occurring radioactive gas formed in the soil with higher predominance in granitic zones. It is a well-known Indoor Air Quality (IAQ) parameter that is measured in higher radon risk zones. The proposed methodology begins with a unidimensional data characterization followed by a multidimensional analysis that will relate radon concentration with other parameters, i.e. Temperature, Relative Hu...
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 I.In 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,...
Short-term indoor radon gas study in a granitic school building: A comparative ...
Azevedo, Rolando; Silva, Joaquim P.; Lopes, Nuno; Curado, António; Lopes, Sérgio I.Granite territories continuously release radon, a radioactive gas that can be very harmful to human health. The assessment of radon gas indoor concentration is relevant for granitic buildings that lie over this substrate. In this work we use a sensor system to study the variation through time of indoor air quality (IAQ) parameters like radon concentration, temperature, and humidity following the occupation patt...
Joining sustainable design and internet of things technologies on campus : the ...
Curralo, Ana Filomena; Lopes, Sérgio I.; Mendes, João; Curado, AntónioHigher education institutions (HEIs) are favored environments for the implementation of technological solutions that accelerate the generation of smart campi, given the dynamic ecosystem they create based on the involvement of inspired and motivated human resources (students, professors, and researchers), moving around in an atmosphere of advanced digital infrastructures and services. Moreover, HEIs have, in th...
A pre-diagnosis model for radon potential evaluation in buildings : a tool for ...
Silva, Joaquim; Lopes, Nuno; Curado, António; Nunes, Leonel J. L.; Lopes, Sérgio I.In a very early stage of implementation of a comprehensive experimental campaign for indoor radon assessment, a preevaluation 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 d...
Contactless smart screening in nursing homes : an IoT-enabled solution for the ...
Lopes, Sérgio I.; Pinho, Pedro; Marques, Paulo; Abreu, Carlos; Carvalho, Nuno B.; Ferreira, JoséIn the COVID-19 era, the provision of health indicators seamlessly and without contact, in groups at risk such as the elderly, is crucial due to the fast spread of the disease and the need to act quickly to contain its evolution. Continuous monitoring of vital signs, such as body temperature and cardio-respiratory rates, can be vital in early detection and prediction of COVID-19, which rapidly progresses and pa...
On the design of a Human-in-the-Loop Cyber-Physical System for online monitorin...
Lopes, Sérgio I.; Cruz, António M.; Moreira, Pedro M.; Abreu, Carlos; Silva, Joaquim P.; Lopes, Nuno; Vieira, José M. N.; Curado, AntónioThis paper presents the design methodology used to specify a Human-in-the-Loop Cyber-Physical System (HITLCPS)for online monitoring and active mitigation of the indoor radon gas concentration in non-residential granitic buildings with regular human occupation restricted to a work schedule, such as public buildings like administration offices, schools, kindergartens, etc. The paper follows the methodology that i...
Challenges in resource-constrained IoT devices: energy and communication as cri...
Pereira, Felisberto; Correia, Ricardo; Pinho, Pedro; Lopes, Sérgio I.; Carvalho, Nuno BorgesInternet of Things (IoT) has been developing to become a free exchange of useful information between multiple real-world devices. Already spread all over the world in the most varied forms and applications, IoT devices need to overcome a series of challenges to respond to the new requirements and demands. The main focus of this manuscript is to establish good practices for the design of IoT devices (i.e., smart...
Antenna design for ultra-compact Bluetooth devices
Pereira, Felisberto; Pinho, Pedro; Gonçalves, Ricardo; Carvalho, Nuno; Lobato, João; Lopes, Sérgio I.This paper presents a solution for an ultra-compact antenna for small Bluetooth devices. The work considers the battery and the electronic components influence in the antenna design process for a real device, i.e. a Bluetooth tracker. Three different models for representing the battery and the main electronic components are studied: (i) a simple model that represents both battery and components by a ground plan...