IEEE Latin America Transactions最新文献

Short-Circuit Performance of a Synchronverter-Based Microgrid

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2025-03-18 DOI: 10.1109/TLA.2025.10930376

Cristian Hernández García;Juan Segundo Ramírez;Nancy Visairo Cruz;Jesús Camarillo Montero

引用次数: 0

Spectral coherence as a method for evaluating adaptive filtering techniques in photoplethysmography

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2025-03-17 DOI: 10.1109/TLA.2025.10930368

Minerva Guadalupe Vázquez Domínguez;Juan Gerardo Ávalos Ochoa;Juan Carlos Sánchez García;Brayans Becerra Luna

{"title":"Spectral coherence as a method for evaluating adaptive filtering techniques in photoplethysmography","authors":"Minerva Guadalupe Vázquez Domínguez;Juan Gerardo Ávalos Ochoa;Juan Carlos Sánchez García;Brayans Becerra Luna","doi":"10.1109/TLA.2025.10930368","DOIUrl":"https://doi.org/10.1109/TLA.2025.10930368","url":null,"abstract":"In this study, we introduce a method that utilizes spectral coherence as a metric for assessing the restoration of the photoplethysmographic (PPG) pulse signal morphology when filtering myokinetic noise using adaptive filtering techniques. Unlike other approaches that simply focus on detecting peaks and valleys after filtering, our research concentrates on recovering most of the components of the PPG pulse curve, as these reveal highly important information about cardiovascular health status, and which is essential for a proper diagnosis. To record PPG signals, a photoplethysmography system was placed on both hands of the subjects. On one hand, a three-axis accelerometer was also attached to capture the myokinetic motion, while the other hand remained stationary, allowing the PPG system to record a motion-free signal. After capturing the PPG signals with and without motion, we conducted an analysis by calculating the spectral coherence of the contaminated and recovered signals after adaptive filtering. We compared noisy PPG signals with the reference signal (myokinetic motion-free PPG signal). Based on the spectral coherence criterion, the affine projection algorithm and the variable step-size affine projection algorithm were found to be the most effective for filtering a PPG signal contaminated by myokinetic noise, achieving similarity scores of 94.25% and 94.67%, respectively, between the filtered signal and the motion-free pulse signal.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"23 4","pages":"274-284"},"PeriodicalIF":1.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10930368","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new solution based on multi-objective algorithm for multi-application mappings for Many-Core systems

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2025-03-17 DOI: 10.1109/TLA.2025.10930369

Manoel de Almeida;Emerson Pedrino;Igor Gallon

{"title":"A new solution based on multi-objective algorithm for multi-application mappings for Many-Core systems","authors":"Manoel de Almeida;Emerson Pedrino;Igor Gallon","doi":"10.1109/TLA.2025.10930369","DOIUrl":"https://doi.org/10.1109/TLA.2025.10930369","url":null,"abstract":"In the current context of intelligent systems and big data, specifically concerning high-performance and efficient data processing for streams applications, single-core systems can no longer meet this demand. Increasing their operating frequencies would result in higher energy consumption for the chip as a whole. Thus, in this scenario, multicore and manycore chips appear to be a viable solution. However, distributing mono8 application or multi-application tasks on these devices is not trivial in practice. It is necessary to consider heat dissipation effects throughout the system while simultaneously ensuring fault tolerance and good load balancing. Although there is not yet a considerable number of works in the literature addressing the allocation of multi-applications in NoCs, there are many works focusing on mapping mono-applications. Therefore, this article proposes a multi-objective mapping model that focuses on performance metrics and heat distribution for multi-applications in manycores with NoCs, aiming to contribute in this direction. The results found are compared with the state-of-the-art algorithm in this scenario, showing promise for the field, with improvements of more than 30% in latency and 38% in fault tolerance when all applications are taken into account.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"23 4","pages":"323-328"},"PeriodicalIF":1.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10930369","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improved Parallel Algorithm for Finding Minimum Cuts in Stochastic Flow Networks

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2025-03-17 DOI: 10.1109/TLA.2025.10930375

Mohammad Joshan;Jose Hiroki Saito;Emerson Carlos Pedrino

引用次数: 0

FreeRTOS Application in a Real-Time Air Quality Monitoring Architecture for Smart Campus

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2025-03-17 DOI: 10.1109/TLA.2025.10930347

Elton Alves;Noedson Silva;Warley Júnior;Alife Moraes;Nandson Silva;Andson Balieiro

{"title":"FreeRTOS Application in a Real-Time Air Quality Monitoring Architecture for Smart Campus","authors":"Elton Alves;Noedson Silva;Warley Júnior;Alife Moraes;Nandson Silva;Andson Balieiro","doi":"10.1109/TLA.2025.10930347","DOIUrl":"https://doi.org/10.1109/TLA.2025.10930347","url":null,"abstract":"Monitoring air quality in smart campuses is essential for safeguarding the health of the academic community, as air pollution in university environments can lead to respiratory and cardiac issues. While the Internet of Things (IoT) offers a suitable solution for monitoring and notifying about air quality in smart campuses, it is of paramount importance that these notifications occur in real-time to ensure information reaches users with minimal latency. This paper presents an architecture for collecting, storing, and notifying about atmospheric pollutants in a smart campus and analyzes the use of Real-Time Operating Systems (RTOS) for managing the system. The evaluation focuses on IoT technologies, represented by the end node, gateway, and cloud server. The experimental results show that using RTOS reduces the average transmission interval by 37.5% and achieves higher transmission and reception throughput compared to non-real-time operating systems. For instance, in a monitored location, the transmission and reception throughput reached approximately 178.23 and 164.18 with RTOS, compared to 110.97 and 99.41 without RTOS, respectively.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"23 4","pages":"266-273"},"PeriodicalIF":1.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10930347","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Artificial Neural Network Applied to Virtual Commissioning and Control of a Robotic Cell

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2025-03-17 DOI: 10.1109/TLA.2025.10930373

Gabriel Bastos de Miranda;Fábio Lima

{"title":"Artificial Neural Network Applied to Virtual Commissioning and Control of a Robotic Cell","authors":"Gabriel Bastos de Miranda;Fábio Lima","doi":"10.1109/TLA.2025.10930373","DOIUrl":"https://doi.org/10.1109/TLA.2025.10930373","url":null,"abstract":"The world is undergoing significant changes in information technologies and industrial processes. The rise of Industry 4.0 and the advancement of artificial intelligence are creating new opportunities and challenges for industries. This study investigates the feasibility of substituting a traditional programmable logic controller (PLC) with a neural network-based control system for discrete event management within a robotic cell. The research assesses the feasibility of this replacement, analyzing the associated challenges, limitations, and advantages compared to traditional methods. Digital manufacturing software is employed for simulating and validating the proposed model through a Virtual Comissioning (VC). The control system of the proposed model utilizes artificial neural networks, trained using data derived from a Boolean logic model. The results indicate that it is possible to swiftly train an artificial neural network (ANN) to take over cell control. This approach opens up the possibility of implementing low-cost hardware, aligning the system with the concepts of Industry 4.0. Additionally, the virtual modeling conducted using digital manufacturing software paves the way for a future implementation of a digital twin. Findings indicate that the neural network control approach is feasible and offers operational advantages over traditional programming methods.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"23 4","pages":"301-311"},"PeriodicalIF":1.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10930373","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

COVID-19 impact in the Brazilian Multiplex Air Transportation Network

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2025-03-17 DOI: 10.1109/TLA.2025.10930377

Fernanda Silva Toledo;Nelson Francisco Favilla Ebecken

{"title":"COVID-19 impact in the Brazilian Multiplex Air Transportation Network","authors":"Fernanda Silva Toledo;Nelson Francisco Favilla Ebecken","doi":"10.1109/TLA.2025.10930377","DOIUrl":"https://doi.org/10.1109/TLA.2025.10930377","url":null,"abstract":"The Brazilian Air Transportation Network has been changing in the last years, due to an economic recession since 2016, the concession of the main airports and the impact of the COVID-19 pandemic. Air transportation is a complex infrastructure system, in which each airline represents a different layer. Adding the weight of interactions combined with a multilayer approach can make the network description even more detailed than a single-layer analysis, because important network features emerge from the multilayer character. The multilayer approach for complex networks is yet new in the literature. As far as the authors know, there are no studies yet applying multiplex network to analyze domestic and international Brazilian air network to improve the understanding of complex systems and investigate macroeconomic effects of the economic recession and COVID-19 pandemic in the air network. The objective of this paper is to evaluate changes in the Brazilian Air Transportation network from 2019 to 2020, before and during the COVID-19 pandemic, using topology measures for network characterization. We compared the network topology and evaluated COVID-19 impact on airports under concession and on regional aviation, also comparing with the aggregated approach. Results show a network concentration during this period in hub airports, reduced connectivity and reduced density resulting in a sparser network. The airlines strategies were different over this period and the multilayer approach changed the importance ranking of airports compared with the aggregated approach. These analyses indicate an opportunity to improve regional air transportation and the need to enhance regional airports versatility.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"23 4","pages":"294-300"},"PeriodicalIF":1.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10930377","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Table of Contents April 2025

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2025-03-17 DOI: 10.1109/TLA.2025.10930371

引用次数: 0

Design and Analysis of an Improved Gain Single Inductor Dual Switch DC-DC Converter with Reduced Duty Ratio and Minimal Voltage Stress

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2025-03-17 DOI: 10.1109/TLA.2025.10930372

Srimaheswaran V;Niveditha N;Rajan Singaravel M M

{"title":"Design and Analysis of an Improved Gain Single Inductor Dual Switch DC-DC Converter with Reduced Duty Ratio and Minimal Voltage Stress","authors":"Srimaheswaran V;Niveditha N;Rajan Singaravel M M","doi":"10.1109/TLA.2025.10930372","DOIUrl":"https://doi.org/10.1109/TLA.2025.10930372","url":null,"abstract":"This paper proposes an Improved Gain Single Inductor Dual Switch Converter (IGSIDSC) for the grid integration of solar and fuel cells, which achieves high voltage gain at reduced duty ratio and with less component count. The proposed converter is designed to operate with a duty ratio less than 50% to ensures reduced losses and less component stress This salient feature makes the proposed converter unique among the other converters reported so far. By reducing voltage stress on switches and diodes, the design permits the use of lower-rated components and reduces the cost. The common ground configuration helps to reduce dv/dt issue. The IGSIDSC is analyzed in steady state with consideration of parasitic resistance for all components of the converter. Further, the simulation results are validated through experimental investigation using the prototype developed in laboratory for the power rating of 200 W. Also, the investigations on steady-state performance and dynamic behavior of the experimental prototype effectively demonstrate the successful operation of the IGSIDSC.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"23 4","pages":"339-352"},"PeriodicalIF":1.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10930372","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dense-PMSFNet: DenseNet Pyramidal Multi-Scale Fusion Network for Retinal Vasculature and FAZ Segmentation in OCTA Images

IF 1.3 4区工程技术

IEEE Latin America Transactions Pub Date : 2025-03-17 DOI: 10.1109/TLA.2025.10930374

Nisan Pranavah Raja;Srivatsan Sarvesan;Anju Thomas;Varun P Gopi

{"title":"Dense-PMSFNet: DenseNet Pyramidal Multi-Scale Fusion Network for Retinal Vasculature and FAZ Segmentation in OCTA Images","authors":"Nisan Pranavah Raja;Srivatsan Sarvesan;Anju Thomas;Varun P Gopi","doi":"10.1109/TLA.2025.10930374","DOIUrl":"https://doi.org/10.1109/TLA.2025.10930374","url":null,"abstract":"Diabetic retinopathy (DR) is a condition that leads to damage to the retina due to high blood sugar levels in the eyes caused by prolonged diabetes. People of working age in developing countries are particularly at risk of developing diabetic retinopathy, which causes permanent vision loss in diabetic patients. Diagnosis involves maintaining the current level of vision of the patient, as the disease can cause blindness. Optical Coherence Tomography Angiography (OCTA) is an advanced eye imaging technique that offers a detailed view of the structures of retinal blood vessels and effectively treats various eye conditions. Therefore, it is crucial to accurately identify and separate the capillary, artery, vein, and Foveal Avascular Zone (FAZ) from OCTA images. The DenseNet Pyramidal MultiScale Fusion Network (Dense-PMSFNet) is introduced in this article as a new segmentation network based on deep learning. It utilizes the DenseNet Encoder to integrate local semantic contextual information, the Multi-Scale Pyramidal Fusion Module (MSPFM) to effectively merge local features at different scales, and Deep Fusion to enhance the representation of multiscale decoder outputs. Through extensive experimentation on four distinct segmentation tasks involving capillary, artery, vein, and FAZ from OCTA images, it has demonstrated superior performance for the quantitative metrics such as Dice coefficient (DSC), Accuracy (ACC), Intersection Over Union (IoU), Specificity (SP) and Sensitivity (SE) in comparison to state-of-the-art methods.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"23 4","pages":"312-322"},"PeriodicalIF":1.3,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10930374","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0