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Design and Validation of an IoT System for an Experimental Laboratory Microgrid
IF 1.3 4区 工程技术 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-12-20 DOI: 10.1109/TLA.2025.10810485
Juan M. Rey;Jonathan Gómez;Natalia Duarte;Iván Hernández;Maria A. Mantilla;Oscar Quiroga
In the energy transition context, electrical microgrids facilitate the integration of renewable generation into the electrical grid, improving the electrical system's reliability and accelerating its decarbonization. However, to promote the technological advancement of these grids, it is necessary to develop tools to validate new technologies and solutions, such as using the Internet of Things (IoT) for their operation and control. This work presents the design, implementation, and validation of an IoT system for an experimental laboratory microgrid developed at Universidad Industrial de Santander. The main design phases of the IoT system are described, beginning with the definition of requirements and extending through the component selection. Validation tests are proposed to verify the functionalities of the IoT system. The results demonstrate that the IoT system successfully enables the transmission and reception of data from external users and servers. The reported experience and the proposed validation tests are relevant for researchers interested in implementing IoT-based stages in existing or future laboratory microgrids.
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引用次数: 0
Personalized Digital Instructor Based on Arduino for Buerger Exercises in Older Adults with Diabetes: Feasibility Study
IF 1.3 4区 工程技术 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-12-20 DOI: 10.1109/TLA.2025.10810400
Ernesto Ríos Willars;Brandon Emmanuel Delabra Salinas;María Magdalena Delabra Salinas;Daniel Sifuentes Leura;Nereyda Hernández Nava;Alejandro Martínez Ramírez;Rosa Eréndira Fosado Quiroz;Bertha Cecilia Salazar-González
Diabetes in older adults can lead to complications such as peripheral artery disease, neuropathy, and foot ulcers. Accessing treatments can be challenging due to limited resources. Implementing low-cost preventive therapies like Buerger's exercises is essential. However, these exercises must be standardized. The purpose was to develop an Arduino-based electronic system as a gerontechnological tool for homologating Buergers exercises and facilitating their execution by older adults with diabetes mellitus. The Intervention Theory by Sidani guided the development of this study. A feasibility and pilot study with one group, pretest/posttest design, was conducted in twenty older adults with HbA1c 8% and their caregivers in Saltillo, Coahuila, Mexico, from November 2020 to June 2021. Feasibility was measured with an acceptability and satisfaction instrument; the ankle-arm index was measured with 8 Hertz Doppler and neuropathy symptoms with a modified Toronto Clinical Neuropathy Score. The mean age was 67.50 5.61 years old in older adults and 48.32 16.26 in caregivers. The digital instructor was accepted by 73.3% (11 older adults) without any issues; 47.4% (9 older adults) and 26.3% (6 caregivers) expressed high levels of satisfaction. Participants noted significant benefits such as improved peripheral circulation, reduced pain, numbness, and tingling. These promising results underscore the potential of the electronic system to make a noticeable improvement in the lives of older adults with diabetes mellitus and their caregivers. The device was meticulously designed to be user-friendly and accessible, making it ideal gerontechnological tool to manage health at home.
老年人患糖尿病会导致并发症,如外周动脉疾病、神经病变和足部溃疡。由于资源有限,获得治疗可能具有挑战性。实施布格氏运动等低成本的预防性疗法至关重要。但是,这些练习必须标准化。我们的目的是开发一个基于 Arduino 的电子系统,作为一种通用技术工具,用于布格尔运动的标准化,并方便患有糖尿病的老年人进行这些运动。Sidani 的干预理论为本研究的发展提供了指导。2020 年 11 月至 2021 年 6 月期间,在墨西哥科阿韦拉州萨尔蒂略市对 HbA1c 为 8%的 20 名老年人及其护理人员进行了一项可行性试点研究,采用一组、前测/后测设计。可行性通过可接受性和满意度工具进行测量;踝臂指数通过 8 赫兹多普勒进行测量;神经病变症状通过改良的多伦多临床神经病变评分进行测量。老年人的平均年龄为 67.50 5.61 岁,护理人员的平均年龄为 48.32 16.26 岁。73.3%(11 位老年人)接受了数字指导器,没有任何问题;47.4%(9 位老年人)和 26.3%(6 位护理人员)表示非常满意。参与者注意到了明显的益处,如改善外周循环、减轻疼痛、麻木和刺痛。这些令人鼓舞的结果凸显了电子系统明显改善老年糖尿病患者及其护理人员生活的潜力。该设备经过精心设计,方便用户使用,使其成为在家管理健康的理想通用技术工具。
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引用次数: 0
Editorial 2025
IF 1.3 4区 工程技术 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-12-19 DOI: 10.1109/TLA.2025.10810398
Daniel Ulises Campos Delgado
Editorial of inaugural edition of IEEE Latin America Transactions in 2025.
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引用次数: 0
Optimizing Solar Irradiance Prediction: Feature Selection for All-Sky Image Processing Using a Hybrid Prediction Method
IF 1.3 4区 工程技术 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-12-19 DOI: 10.1109/TLA.2025.10810404
Joylan Nunes Maciel;Gustavo de Souza Campoi;Willian Zalewski;Jorge Javier Gimenez Ledesma;Oswaldo Hideo Ando Junior
The forecasting of solar irradiance is crucial for photovoltaic solar energy generation, as production is subject to intermittency due to climatic conditions, such as cloud cover, wind and, temperature. Based on the Hybrid Prediction Method (HPM), this study investigated the influence of a set of all-sky image processing features on the HPMs Artificial Neural Network prediction accuracy. Using correlation-based attribute selection, three predictive models with different input feature sets were evaluated. The results show that, when considering all horizons together and paired, the Medium set of 6 features achieves prediction accuracy statistically similar to the Complete set with 9 features, reducing the computational time (14.4%) and model input dimensionality (33.3%). However, when comparing individual horizons, the Complete set outperforms the Medium set at 5- and 15-minute horizon, while maintain similar accuracy at the 1-minute horizon. The Reduced set, with three features, consistently underperformed. This study provides news insights into the optimization of solar irradiance forecasting using HPM, contributing to advances in photovoltaic energy forecasting.
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引用次数: 0
Investigation and Optimization of StringDeduplication with Custom Heuristic in Different Versions of the JVM
IF 1.3 4区 工程技术 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-12-19 DOI: 10.1109/TLA.2025.10810397
Darlan Noetzold;Anubis Graciela de Moraes Rossetto;Jorge Barbosa;Valderi Reis Quietinho Leithardt
Memory optimization in Java applications is essential for performance and scalability. This paper investigates the efficiency of the StringDeduplication parameter in JVM versions 11, 17, and 21, using a Web Crawler developed in Spring Boot. The results show that the efficiency of StringDeduplication decreased from 34.3% deduplication in version 11 to 3.4% in version 21, with an increase in deduplication time from 1,264 ms to 3,439 ms. To mitigate this problem, a custom solution in C was developed for JVM version 21, which increased deduplication to 31.1% and saved 110.2 MB of memory. The main scientific contribution of this work is the identification of the loss of efficiency of StringDeduplication in the latest JVM versions and the proposal of a custom solution that improves string deduplication, offering a viable alternative for developers and software engineers.
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引用次数: 0
STAR-IRS Assisted Rate Splitting Multiple Access with Perfect and Imperfect CSI for 6G Communication
IF 1.3 4区 工程技术 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-12-19 DOI: 10.1109/TLA.2025.10810403
Aswini Krishnan;Sundaresan Sabapathy;Surendar Maruthu
Incorporating cutting-edge technology like rate splitting multiple access (RSMA) and intelligent reflecting surface (IRS) are essential in 6G communications to satisfy the constantly growing needs for more connection, better reliability, and faster data rates. This paper explores the concept of simultaneously transmitting and reflecting IRS (STAR-IRS) assisted RSMA in the presence of both perfect and imperfect channel state information (CSI). STAR-IRS leverages its dual capability to transmit and reflect signals simultaneously, enhancing spectral efficiency and expanding coverage. So far, in literature, STAR-IRS assisted RSMA system is analyzed in terms of outage probability with perfect CSI scenario. So, in this work, we carry out the performance analysis of STAR-IRS in terms of outage probability and sum rate. Firstly, we derive the analytical expression of the outage probability and sum rate. Secondly, we propose a automatic optimization (AO) algorithm for weighted sum rate (WSR) maximization. The performance analysis is carried out by varying power allocation factor to find its optimality. The derived outage probability and sum rate expressions are validated with Monte Carlo simulations. Also, it is found that on using WSR maximization, the sum rate is enhanced for STAR-IRS based RSMA system when compared with the conventional sum rate maximization.
为满足对更多连接、更高可靠性和更快数据传输速率不断增长的需求,在 6G 通信中采用速率分裂多路存取(RSMA)和智能反射面(IRS)等尖端技术至关重要。本文探讨了在完美和不完美信道状态信息(CSI)同时存在的情况下,同时发射和反射 IRS(STAR-IRS)辅助 RSMA 的概念。STAR-IRS 利用其同时发射和反射信号的双重能力,提高了频谱效率并扩大了覆盖范围。迄今为止,文献中的 STAR-IRS 辅助 RSMA 系统都是在完美 CSI 情况下分析中断概率的。因此,在本研究中,我们从中断概率和总和率两个方面对 STAR-IRS 进行性能分析。首先,我们推导出中断概率和总和率的分析表达式。其次,我们提出了加权总和率(WSR)最大化的自动优化(AO)算法。通过改变功率分配系数进行性能分析,以找到其最优性。得出的中断概率和总和率表达式通过蒙特卡罗模拟进行了验证。同时发现,与传统的和率最大化相比,使用 WSR 最大化时,基于 STAR-IRS 的 RSMA 系统的和率得到了提高。
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引用次数: 0
Through the Youth Eyes: Training Depression Detection Algorithms with Eye Tracking Data
IF 1.3 4区 工程技术 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-12-19 DOI: 10.1109/TLA.2025.10810399
Derick Axel Lagunes-Ramírez;Gabriel González-Serna;Leonor Rivera-Rivera;Nimrod González-Franco;María Y. Hernández-Pérez;José A. Reyes-Ortiz
Depression is a prevalent mental health disorder, and early detection is crucial for effective intervention. Recent advancements in eye-tracking technology and machine learning offer new opportunities for non-invasive diagnosis. This study aims to assess the performance of different machine learning algorithms in. predicting depression in a young sample using eye-tracking metrics. Eye-tracking data from 139 participants were recorded with an emotional induction paradigm in which each participant observed a set of positive and negative emotional stimuli. The data were analyzed to find differences between groups, where the most significant features were selected to train prediction models. The dataset was then split into training and testing sets using stratified sampling. Four algorithms support vector machines (SVM), random forest (RF), a multi-layer perceptron (MLP) neural network, and gradient boosting (GB) were trained with hyperparameter optimization and 5-fold cross-validation. The RF algorithm achieved the highest accuracy at 84%, followed by SVM, GB, and the MLP neural network. Performance metrics such as accuracy, recall, F1-score, precision recall area under the curve (PR-AUC), and Matthews Correlation Coefficient (MCC) were also used to evaluate the models. The findings suggest that eye-tracking metrics combined with machine learning algorithms can effectively identify depressive symptoms in the young, indicating their potential as non-invasive diagnostic tools in clinical settings.
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引用次数: 0
A Novel Approach to Performance Evaluation of Current Controllers in Power Converters and Electric Drives Using Non-Parametric Analysis
IF 1.3 4区 工程技术 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-12-19 DOI: 10.1109/TLA.2025.10810402
Gustavo Ignacio Rivas-Martínez;Jorge Rodas;Edher Herrera;Jesús Doval-Gandoy
In the field of current controllers for power converters and electric motor units, conventional figures of merit (FMs) such as mean squared error (MSE), integral of time multiplied by absolute error (ITAE), or total harmonic distortion (THD) have traditionally been used. The stochastic nature of these FMs introduces variability, which often results in inaccurate comparisons of the controllers' performance. To address this issue, a parametric statistical methodology has recently been proposed. However, it presents certain limitations, such as the assumption of normality. In response to this, the adoption of a non-parametric methodology is suggested in this work, which promises a precise evaluation of the efficiency of current controllers. In this study, we demonstrate that, under parametric approach, when the assumption of normality is violated, there is a significant increase in Type I error. Furthermore, we show that the non-parametric Mann-Whitney U test offers greater sensitivity compared to its parametric counterpart under these circumstances. Thus, the newly proposed methodology aims to optimize the decision-making process in designing high-performance current controllers for applications in power converters and electric motors. This allows for design decisions grounded in rigorous and statistically-based evaluations. The effectiveness of this methodology is confirmed through its application to a real dataset, enhancing its practicality and contributing to a deeper understanding of the subject matter.
在用于电源转换器和电动马达装置的电流控制器领域,传统上使用的是均方误差 (MSE)、时间乘以绝对误差积分 (ITAE) 或总谐波失真 (THD) 等传统的性能指标 (FM)。这些调频的随机性带来了可变性,往往导致控制器性能的比较不准确。为解决这一问题,最近提出了一种参数统计方法。不过,这种方法也存在一定的局限性,例如假设正态性。为此,本研究建议采用非参数方法,以精确评估当前控制器的效率。在这项研究中,我们证明了在参数方法下,当违反正态性假设时,I 类错误会显著增加。此外,我们还证明,在这种情况下,非参数的曼-惠特尼 U 检验比参数检验具有更高的灵敏度。因此,新提出的方法旨在优化设计高性能电流控制器的决策过程,以应用于功率转换器和电机。这样就能在严格的统计评估基础上做出设计决策。通过将该方法应用于真实数据集,证实了其有效性,从而增强了其实用性,并有助于加深对该主题的理解。
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引用次数: 0
Asset Administration Shell Submodel for Representing the Procedural Part of ISA-88 Recipes
IF 1.3 4区 工程技术 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-12-19 DOI: 10.1109/TLA.2025.10810401
Johnny Alvarado;Marcela Vegetti;Silvio Gonnet
It is undeniable the benefits that the implementation of digital twins provides to industries. However, the greatest advances in this regard have been made in the definition and implementation of digital twins in discrete manufacturing industries. The development of these twins is still in its early stages in process industries. An important issue in creating digital twins to support decision-making in the process industry is to be able to describe the production procedures. This paper aims to present an Asset Administration Shell submodel that allows the representation of procedural recipes in the batch process industry based on the ISA-88 standard. This paper proposes a conceptual model to represent the Sequential Function Chart language, which is one of the languages proposed by the mentioned standard to represent manufacturing procedure. In addition, the proposal includes a set of rules to map Sequential Function Chart concepts into concepts belonging to the Asset Administration Shell metamodel introduced by Platform Industrie 4.0. These mapping rules would allow the implementation of tools that automatically translate existing Sequential Function Chart models into Asset Administration Shell submodels to reuse existing knowledge for the implementation of digital twins in batch process industries.
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引用次数: 0
Table of Contents January 2025
IF 1.3 4区 工程技术 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-12-19 DOI: 10.1109/TLA.2025.10810395
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引用次数: 0
期刊
IEEE Latin America Transactions
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