111 documents found, page 1 of 12
AirVA - Indoor Air Quality Monitoring and Control with Occupants Alerting System
Ramos, A.; Bom Jesus, V.; Gonçalves, C.; Caetano, F.; Silveira, C.The objective of this work is to detail the development of an IoT system to monitor the indoor air quality index and record the entry and exit of occupants of the same space. Data is collected, processed, and sent to a data server through the MQTT communication protocol. This server is responsible for storing and displaying information on the ThingsBoard platform. To evaluate the solution, the air quality index...
PetWatcher – Ubiquitous Device Proximity Location System
Fernandim, L.; Gonçalves, C.; Caetano, F.; Silveira, C.This paper presents a solution, PetWatcher, that uses BLE technology in conjunction with the Blynk IoT platform to monitor the proximity of specific devices to a landmark. The main objective is to monitor the presence of devices placed on animals, through MAC address, in relation to a fixed point, controlling the movement of the devices in a specific area. The system was developed using the ESP32 microcontrolle...
EgiCool - IoT Solution for Datacenter Environmental Control and Energy Consumpt...
Gonçalves, V.; Daniel, J.; Gonçalves, C.; Caetano, F.; Silveira, C.The increasing demand for digital services and cloud computing has brought the problem of energy consumption of datacenters and the quest for innovative solutions. Among the emerging approaches, free cooling stands out as a promising technique that allows a significant advancement in the operational efficiency of datacenters, contributing to environmental sustainability. The objective of this work is to detail ...
Airsense - Low-Cost Indoor Air Quality Monitoring Wireless System
Marques, R.; Gonçalves, C.; Pitarma, R.This manuscript presents the project aimed at creating a low-cost indoor air quality monitoring system. By using a variety of sensors connected to an ESP32 microcontroller, the system measures specific parameters such as carbon dioxide, volatile organic compounds, particulate matter, temperature, humidity, and pressure. The sensor-recorded measurements are sent to an InfluxDB database via Wi-Fi, where they are ...
Estudo da dinâmica recente no litoral norte de Portugal com recurso a veículos ...
Henriques, Renato; Chikhradze, Nino; Correia, J.; Gomes, P.; Gomes, Miguel; Gonçalves, C.; Maia, J.; Peixoto, P.; Silva, J.; Pereira, P.RESUMO: Um conhecimento detalhado e atualizado da morfodinâmica local é fundamental para apoiar as decisões e iniciativas de gestão costeira na costa arenosa atlântica do Norte de Portugal. Nos últimos anos foram realizados levantamentos fotográficos de alta precisão com recurso a veículos aéreos não tripulados. As imagens foram processadas e foram produzidos Modelos Digitais de Superfície (MDS) e ortomosaicos ...
Unclonable fluorescent tags produced on bioplastics by in-situ electron beam ir...
Calderon V, S.; Ballesteros, Lina F.; Gonçalves, C.; Dittmann, G.; Evans, C.; Cerqueira, Miguel A.; Pastrana, L. M.Counterfeiting of assets, documents, and goods is a growing issue with substantial economic impacts from the proliferation of fake products and significant risks to consumer health and safety. This highlights the urgent need for advanced anti-counterfeiting technologies. In this work, we demonstrate a novel approach to creating unclonable fluorescent tags on poly(lactic acid) (PLA) films using electron beam irr...
LIPTracker - People Detection System Based on Their Devices
Silveira, C.; Ramos, A.; Gonçalves, C.This manuscript describes LIPTracker, a system for tracking human presence in indoor environments. LIPTracker uses devices connected to the same access point to identify specific users and track their real-time location. The location is estimated based on the Received Signal Strength Indicator (RSSI) of the devices, and the system uses exit zones to determine whether a device is still in the monitored environme...
Sustainable and Autonomous Soil Irrigation: Agro Smart Solution
Santos, G.; Vicente, G.; Salvado, T.; Gonçalves, C.; Caetano, F.; Silveira, C.Water scarcity is probably one of the most serious problems that humanity will have to face globally. For that reason, it will certainly be urgent to try to define practices and find solutions that, in a first phase, allow to mitigate the problem, but whose ultimate objective will be to overcome the situation. This chapter presents an irrigation system set on an internet of things platform, able to act in real ...
Monitoring Indoor Air Quality and Occupancy with an IoT System: Evaluation in a...
Ramos, A.; Jesus, V.; Gonçalves, C.; Caetano, F.; Silveira, C.Indoor air quality is a determining factor in maintaining occupant comfort, especially in educational environments such as classrooms. Traditional methods of monitoring indoor air quality and occupancy, such as casual inspections or periodic measurements, do not provide timely and accurate information for those who must make decisions about ventilation and controlling the number of occupants. Internet of Things...
Association between urinary sodium excretion and body fat in school-aged childr...
Soares, A.P.; Rodrigues, Mónica; Padrão, Patrícia; Gonçalves, C.; Moreira, André; Moreira, PedroChildhood obesity has been associated with increased sodium intake. Nonetheless, evidence linking sodium intake to Body Mass Index (BMI) and Body Fat Mass Percentage (%BF) remains limited, especially in the pediatric age group. Therefore, this study aims to investigate whether there is an association between 24 h urinary sodium excretion with BMI and %BF in a sample group of children from the ARIA study. This c...