Felipe Rodrigues Perche Mahlow;André Felipe Zanella;William Alberto Cruz Castañeda;Regilene Aparecida Sarzi-Ribeiro
{"title":"Illustrating Classic Brazilian Books using a Text-To-Image Diffusion Model","authors":"Felipe Rodrigues Perche Mahlow;André Felipe Zanella;William Alberto Cruz Castañeda;Regilene Aparecida Sarzi-Ribeiro","doi":"10.1109/TLA.2024.10789626","DOIUrl":"https://doi.org/10.1109/TLA.2024.10789626","url":null,"abstract":"In recent years, Generative Artificial Intelligence (GenAI) has undergone a profound transformation in addressing intricate tasks involving diverse modalities such as textual, auditory, visual, and pictorial generation. Within this spectrum, text-to-image (TTI) models have emerged as a formidable approach to generating varied and aesthetically appealing compositions, spanning applications from artistic creation to realistic facial synthesis, and demonstrating significant advancements in computer vision, image processing, and multimodal tasks. The advent of Latent Diffusion Models (LDMs) signifies a paradigm shift in the domain of AI capabilities. This article delves into the feasibility of employing the Stable Diffusion LDM to illustrate literary works. For this exploration, seven classic Brazilian books have been selected as case studies. The objective is to ascertain the practicality of this endeavor and to evaluate the potential of Stable Diffusion in producing illustrations that augment and enrich the reader's experience. We will outline the beneficial aspects, such as the capacity to generate distinctive and contextually pertinent images, as well as the drawbacks, including any shortcomings in faithfully capturing the essence of intricate literary depictions. Through this study, we aim to provide a comprehensive assessment of the viability and efficacy of utilizing AI-generated illustrations in literary contexts, elucidating both the prospects and challenges encountered in this pioneering application of technology.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 12","pages":"1000-1008"},"PeriodicalIF":1.3,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10789626","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810346","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}
Marco Carnaghi;Marcos Judewicz;Paula Cervellini;Rogelio Garcia Retegui;Marcos Funes
{"title":"Stability of Networking DC Microgrids with Active Loads","authors":"Marco Carnaghi;Marcos Judewicz;Paula Cervellini;Rogelio Garcia Retegui;Marcos Funes","doi":"10.1109/TLA.2024.10789631","DOIUrl":"https://doi.org/10.1109/TLA.2024.10789631","url":null,"abstract":"Direct current (DC) networking microgrids have gained prominence as a means to integrate renewable energy sources and enhance system resilience. However, these types of microgrids heavily rely on communication networks, whose inherent time delays can significantly impact system stability. Additionally, the presence of various, often non-linear load characteristics further complicates the scenario. In this paper, a delay-dependent stability analysis for networking microgrids is presented, with a specific focus on robust operation in the presence of active loads. The formulation also accounts for the uncertain and varying nature of loads within microgrids.The results show that active loads impose more stringent constraints on feasible operating conditions, consensus matrix design, and controller tuning.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 12","pages":"1042-1053"},"PeriodicalIF":1.3,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10789631","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810352","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}
Rodolfo Orosco Guerrero;Elias José Juan Rodríguez Segura;José Juan Martínez Nolasco;Fany Rodriguez
{"title":"Low Cost and Optimized FPGA-HIL Real Time Simulation of a Boost Converter Powered by a Photovoltaic Panel","authors":"Rodolfo Orosco Guerrero;Elias José Juan Rodríguez Segura;José Juan Martínez Nolasco;Fany Rodriguez","doi":"10.1109/TLA.2024.10738270","DOIUrl":"https://doi.org/10.1109/TLA.2024.10738270","url":null,"abstract":"This paper presents the development, analysis and testing of a dynamic model for a boost converter powered by a photovoltaic panel. The mathematical model of the panel is presented and a strategy is proposed to integrate its nonlinear dynamics into the dynamic model of the boost converter. Emphasis is placed on the dynamic behavior, leaving the modeling of the effects of parasitic losses inherent to electronic devices for a future study. A discrete model that is feasible to implement in an FPGA to achieve HIL simulation in real time is shown. An optimized strategy of implementation of nonlinear functions implemented in lookup tables is presented. That strategy allows optimizing the resolution without affecting the calculation latency. A latency analysis of the calculation of the model states is also included where a time of 100ns is established for each simulation step. This latency time is sufficient for real-time simulations. Finally, comparisons of results with a software-based simulator to validates the proposed model are shown.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"962-970"},"PeriodicalIF":1.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10738270","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142555116","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}
Gabriel M. Domingues Filho;Caetano M. Ranieri;Saulo Neves Matos;Rodolfo Ipolito Meneguette;Jó Ueyama
{"title":"Deep Learning and object detection for water level measurement using patterned visual markers","authors":"Gabriel M. Domingues Filho;Caetano M. Ranieri;Saulo Neves Matos;Rodolfo Ipolito Meneguette;Jó Ueyama","doi":"10.1109/TLA.2024.10738344","DOIUrl":"https://doi.org/10.1109/TLA.2024.10738344","url":null,"abstract":"Flooding is one of the most impactful natural disasters, causing significant losses and prompting extensive research into monitoring water levels in urban streams. Current technologies rely on pressure and ultrasonic sensors, which, while accurate, can be susceptible to damage from floods and are often costly. As an alternative, ground camera approaches offer a low-cost solution; however, most of these methods use raw images from the water stream and are sensitive to environmental factors. We address this gap with a dataset comprising a visual marker with black bars indicating the water level, which we refer to as \"barcode panel\". We employed various deep learning algorithms to predict the water level and compared their performance. The proposed approach was evaluated using classic classification and error metrics. The models demonstrated accuracy in detecting the water level. These promising results provide important insights for practical applications and future studies.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"892-898"},"PeriodicalIF":1.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10738344","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540482","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}
Marco Quispe;Javier Samaniego;Jorge Olivares;Rolando Adriano;Brayan Perez;Saúl Inca
{"title":"Design and implementation of a low cost isotropic electric field sensor for SAR measurements","authors":"Marco Quispe;Javier Samaniego;Jorge Olivares;Rolando Adriano;Brayan Perez;Saúl Inca","doi":"10.1109/TLA.2024.10738269","DOIUrl":"https://doi.org/10.1109/TLA.2024.10738269","url":null,"abstract":"Specific Absorption Rate (SAR) measurement systems are used to evaluate exposure to fields radiated by wireless devices placed close to people's bodies. One of the fundamental elements of these systems is an isotropic electric field sensor that is small relative to the radiated wavelength. The obtained SAR value must be compared with the basic restriction levels or exposure limits established by the International Commission on Non-Ionizing Radiation Protection (ICNIRP) or similar international bodies. This work presents the design and implementation of a novel isotropic electric field sensor made with low-cost materials and processes. The response of the developed sensor was compared with the response of a commercial probe in order to perform calibration. The calibration methodology proposed in this work allows transforming voltage measured with the developed low-cost probe to electric field values measured with a calibrated commercial probe in order to calculate SAR values. The results show that the developed sensor can be used in SAR measurement processes.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"983-989"},"PeriodicalIF":1.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10738269","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540414","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}
{"title":"High Step-up DC-DC Converter with Reconfiguration Capability","authors":"Krishna Velmajala;Srinivasa Rao Sandepudi","doi":"10.1109/TLA.2024.10738345","DOIUrl":"https://doi.org/10.1109/TLA.2024.10738345","url":null,"abstract":"In this paper a high step-up DC-DC converter is proposed with reconfiguration capability that can operate safely without redundancy even if one of its power electronic switches fails. The proposed converter topology provides continuous input current, reduce voltage stress, uniform current sharing among power electronic switches, common grounding features, and also reduces the power handled by the power electronic devices using alternate paths, thereby improves the converter overall efficiency. Further, the control technique used for the converter reduces the transients during the healthy and fault operations. A fuse-MOSFET pair has been used to protect the converter from short-circuit faults. The proposed converter characteristic is analyzed in the continuous current mode (CCM), and its features are discussed in detail for both healthy and fault operation. The proposed converter was designed, fabricated and experimentally tested in a closed loop at 100 W to verify the operation and feasibility of the controller designed for both healthy and fault operation.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"971-982"},"PeriodicalIF":1.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10738345","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540367","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}
{"title":"Table of Contents November 2024","authors":"","doi":"10.1109/TLA.2024.10738346","DOIUrl":"https://doi.org/10.1109/TLA.2024.10738346","url":null,"abstract":"","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"891-891"},"PeriodicalIF":1.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10738346","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142540406","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}
{"title":"Bioenergy and Electric Power Generation from Agricultural Residues in Morocco: Lessons for Brazil","authors":"Meisam Mahdavi;Augustine Awaafo;Francisco Jurado","doi":"10.1109/TLA.2024.10735448","DOIUrl":"https://doi.org/10.1109/TLA.2024.10735448","url":null,"abstract":"Brazil's and Morocco's energy sectors face a persistent challenge in their heavy reliance on fossil fuel consumption. Brazil is a big consumer of liquefied natural gas (LNG), while Morocco is a big fossil fuel importer. This dependence not only entails substantial import costs for Morocco and high NG liquefaction and transportation expenses for Brazil, but also contributes to elevated carbon emissions. Consequently, Brazil and Morocco are actively exploring substitute resources of renewable power to decrease their dependence on natural fuels and align with global renewable energy targets, including those set forth in agreements like the Kyoto Protocol. Brazil and Morocco boast an abundant array of renewable energy resources, including wind, hydro, solar, and biomass. Leveraging these resources has the potential to swiftly propel these countries towards a low-carbon emissions status when harnessed sustainably for electric power generation. Instead of relying on fossil fuels, the focus of this study is on tapping into the significant potential for power and electricity generation from agricultural residues in Morocco, giving the lessons to Brazilian energy sector for power and electric energy generation form ample agricultural biomass within Brazil. The results show a high potential for energy and electricity generation from cereals, olive biomass, citrus, and date palm residues in Morocco, while cereals, citrus, and sugarcane have better potential for bioenergy and electricity generation in Brazil.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"952-961"},"PeriodicalIF":1.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10735448","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142517912","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}
Baba Fakruddin Monakanti;Giridhar Archakam Vijayaraghavulu;Narasimharaju Beeramangalla Lakshminarasiah;Harish Sarma Krishnamoorthy
{"title":"An Ultra High Gain Switched-Capacitor Boost DC-DC converter with Reduced Ripple Current","authors":"Baba Fakruddin Monakanti;Giridhar Archakam Vijayaraghavulu;Narasimharaju Beeramangalla Lakshminarasiah;Harish Sarma Krishnamoorthy","doi":"10.1109/TLA.2024.10735444","DOIUrl":"https://doi.org/10.1109/TLA.2024.10735444","url":null,"abstract":"An ultra high gain quadratic boost converter based on switched-capacitor is proposed in this article. The ultra high gain is achieved with a low duty ratio and a wide range of flexibility. The proposed converter provides significantly reduced device voltage stress and source current ripple. This article presents in detail discussion on the operating principle, continuous conduction mode (CCM) and, discontinuous conduction modes (DCM) and the parasitics effect on the output voltage and efficiency of the proposed converter. Also, the stated converter performance comparison with similar quadratic boost dc-dc converters is presented. The performance indices of the proposed converter are verified by a prototype of 400 V, 50 kHz, 200 W, subsequently, the converter is also experimented for 800 V output with suitable elements to verify its performance feasibility for ultra voltage gain.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"920-932"},"PeriodicalIF":1.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10735444","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142517864","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}
Jeziel Vazquez;Elías Juan José Rodríguez Segura;Jaime E. Arau Roffiel;Nimrod Vázquez
{"title":"Bidirectional protection for DC systems based on di/dt behavior","authors":"Jeziel Vazquez;Elías Juan José Rodríguez Segura;Jaime E. Arau Roffiel;Nimrod Vázquez","doi":"10.1109/TLA.2024.10735447","DOIUrl":"https://doi.org/10.1109/TLA.2024.10735447","url":null,"abstract":"The modern electric power systems are going through a revolutionary change due the development of DC loads and higher efficiency of DC systems where DC microgrids have some attractive characteristics, however they have several challenges such as limiting and interrupting fault current. In this paper, a protection for DC systems based on transient di/dt detection is proposed to provide faster short-circuit and overcurrent fault detection, where DC breakers are required to be designed for bidirectional fault current conditions, which is a challenge regarding DC microgrid applications due to some associated problems such as long periods of fault interruption, complex circuit structure, and low reliability. The proposal can detect fault current conditions for different distances from the point of failure, and is suitable to operation in both islanding and grid connected conditions. The proposed circuit was analyzed theoretically and experimentally in steady state, as well as under load changes and short circuit conditions to ensure proper operation, making this solution a suitable fast current fault DC breaker solution, which is a significant advantage and requirement in protection of DC systems.","PeriodicalId":55024,"journal":{"name":"IEEE Latin America Transactions","volume":"22 11","pages":"945-951"},"PeriodicalIF":1.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10735447","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142517849","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}