34 documents found, page 1 of 4

Sort by Issue Date

State of the art in electric batteries’ State-of-Health (SoH) estimation with m...

Sylvestrin, Giovane Ronei; Maciel, Joylan Nunes; Amorim, Marcio Luís Munhoz; Carmo, João Paulo; Afonso, José A.; Lopes, Sérgio F.

The sustainable reuse of batteries after their first life in electric vehicles requires accurate state-of-health (SoH) estimation to ensure safe and efficient repurposing. This study applies the systematic ProKnow-C methodology to analyze the state of the art in SoH estimation using machine learning (ML). A bibliographic portfolio of 534 papers (from 2018 onward) was constructed, revealing key research trends. ...


Secret cryptographic key sharing through the integer partition function

Nobrega, Daniel Fernandes da; Amorim, Marcio Luís Munhoz; Lopes, Sérgio F.; Carmo, João Paulo Pereira; Afonso, José A.; Gazziro, Mario

Secret key exchange is a necessary function for modern cryptography. The integer partition function is a mathematical function that arises from number theory. New methods for computing the integer partition function were developed and evaluated in the context of this paper, as well as new methods for using the integer partition function in a secret key exchange. The methods were categorized into single-variable...


Open-source data logger system for monitoring and fault detection in bench testing

Amorim, Marcio Luís Munhoz; Lima, Jorge Gomes; Torres, Norah Nadia Sánchez; Afonso, José A.; Lopes, Sérgio F.; Carmo, João P. P. do

This paper presents the design and development of a proof-of-concept (PoC) open-source data logger system, designed for wireless data acquisition via Wi-Fi, aimed at bench testing and fault detection in combustion and electric engines. The system integrates several sensors, including accelerometers, microphones, thermocouples, and gas sensors, to monitor critical parameters such as vibration, sound, temperature...


An efficient adaptive data-link-layer architecture for LoRa networks

Coutinho, Micael Bruno Silva; Afonso, José A.; Lopes, Sérgio F.

LoRa is one of the most popular low-power wireless network technologies for implementation of the Internet of Things, with the advantage of providing long-range communication, but lower data rates, when compared with technologies such as Zigbee or Bluetooth. LoRa is a single-channel physical layer technology on top of which LoRaWAN implements a more complex multi-channel network with enhanced functionalities, s...


Editorial: wireless networks and IoT applications

Lopes, Sérgio F.; Costa, António; Santos, Henrique

[Excerpt] Wireless networks play a key role in IoT applications, often with wireless sensor networks as ad hoc local area networks with self-healing routing, recent low-power wide-area network technologies enabling new application felds and/or more efcient architectures, and mobile networks ofering the possibility of extending applications to remote areas. Wireless networks also enable innovative and interestin...


Environmental parameters monitoring system with an application interface for sm...

Ramos, Jorge; Teixeira, André; Arantes, Carlos; Lopes, Sérgio F.; Esteves, João Sena

Air pollution has become a major cause of health problems and mortality. Monitoring systems based on fixed stations are not able to adequately characterize air pollution on a large area such as city. This paper describes the study, development, implementation and validation of a mobile system for monitoring environ-mental parameters. The system consists of a sensor network, a communications system, a web applic...


Documentation-driven GUI development for integration of image processing libraries

Lopes, Ana Patrícia Ribeiro; Silva, Daniel F.; Lopes, Sérgio F.; Correia, J. H.; Lima, C. S.; Silva, Carlos A.

A graphical integrated development environment (IDE) for computer vision applications allows developing solutions by composing graphical widgets that represent operators of a computer vision library. A challenge in developing such IDE is the development of a graphical interface for each operator in the library, which is a slow and repetitive task. In this paper, we propose to generate a specific graphical widge...


A dataflow execution engine for automatic visual inspection of production lines

Silva, Daniel; Lopes, Ana Patrícia Ribeiro; Costa, Daniel; Cabral, José; Silva, Carlos A.; Lopes, Sérgio F.

Automatic visual inspection is used to control the quality of the assembly steps of a product. By allowing the early detection of faults in the production line, it can have a large economic impact. In this work, we propose an execution environment for supporting the development of automatic visual inspection applications and running them in the production line. The applications are described as graphs, which ar...


Cost effective CTD for long term deployments in water columns

Rocha, J. L.; Matos, T.; Martins, Marcos Silva; Lopes, Sérgio F.; Gomes, Pedro T.; Henriques, Renato F.; Gonçalves, L. M.

Estuaries have the particularity of being in constant change concerning the salinity of the water, since the river carries fresh water to the mouth, while the force of the tide pushes salty water upstream, reaching several kilometers upstream given the right conditions. These bodies of water do not mix instantly, allowing the appearance of a distinct border between the two, known as the front. This document pre...


Preface S-cube 2019

Costa, António; Santos, Henrique; Lopes, Sérgio F.


34 Results

Queried text

Refine Results

Author





















Date





















Document Type







Access rights



Resource



Subject