Frontiers in electronics最新文献

Quantitative musculoskeletal monitoring and analysis in aquatic rehabilitation. 水生康复中的定量肌肉骨骼监测与分析。

IF 1.8

Frontiers in electronics Pub Date : 2025-01-01 Epub Date: 2025-04-02 DOI: 10.3389/felec.2025.1566899

Abu Bony Amin, Ebenezer Asabre, Sina Razaghi, Yeonsik Noh

{"title":"Quantitative musculoskeletal monitoring and analysis in aquatic rehabilitation.","authors":"Abu Bony Amin, Ebenezer Asabre, Sina Razaghi, Yeonsik Noh","doi":"10.3389/felec.2025.1566899","DOIUrl":"10.3389/felec.2025.1566899","url":null,"abstract":"The benefits of aquatic rehabilitation have been demonstrated to promote wellbeing and facilitate motor recovery in middle-aged adults and geriatrics. Individualized patient-centered treatment is essential to accelerate and improve the rehabilitation process of neurological and orthopedic patients. Although aquatic therapy and rehabilitation are well known to be beneficial to these populations, it can be challenging for therapists to visualize and monitor patient progress and provide individualized feedback to ensure correct movement as planned. To establish the suitability of the developed wearable device in an aquatic environment, this study compared the extracted features of the sEMG and IMU data in on-land and aquatic environments for the bicep curls (BC) and tricep kickback (TK) protocols. We conducted a systematic analysis of the reproducibility and precision of the sEMG-IMU characteristics to assess the feasibility of the device for practical applications. While time and frequency domain features of sEMG were higher in aquatic environments compared to on-land, the Intraclass Correlation Coefficient (ICC) for these features ranged from 0.81 to 0.98, and the Coefficient of Variation (CV%) exhibited a range of 5.7% to 14.4%, highlighting reproducibility and correlation across environments in the two protocols. Environment. Moreover, for frequency domain the reproducibility and precision of the sEMG recordings for each muscle in this study were obtained high (ICC = 0.92 - 0.96, CV% = 5.4 - 13.8%). It's noticeable that the observed acceleration data is almost similar to the same movement was maintained throughout the exercise. Eventually, the quantitative result is used to cluster the protocol types along with various repetitions to promote the personalized aquatic rehabilitation.","PeriodicalId":73081,"journal":{"name":"Frontiers in electronics","volume":"6 ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13175757/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147965789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 e-health cloud-based system for cardiovascular risk assessment 基于云的心血管风险评估电子健康新系统

Frontiers in electronics Pub Date : 2023-12-22 DOI: 10.3389/felec.2023.1315132

G. Tatsis, G. Baldoumas, V. Christofilakis, P. Kostarakis, P. Varotsos, N. Sarlis, E. Skordas, A. Bechlioulis, L. Michalis, K. K. Naka

{"title":"A new e-health cloud-based system for cardiovascular risk assessment","authors":"G. Tatsis, G. Baldoumas, V. Christofilakis, P. Kostarakis, P. Varotsos, N. Sarlis, E. Skordas, A. Bechlioulis, L. Michalis, K. K. Naka","doi":"10.3389/felec.2023.1315132","DOIUrl":"https://doi.org/10.3389/felec.2023.1315132","url":null,"abstract":"Sudden cardiac death (SCD) is one of the leading causes of death worldwide. Many individuals have no cardiovascular symptoms before the SCD event. As a result, the ability to identify the risk before such an event is extremely limited. Timely and accurate prediction of SCD using new electronic technologies is greatly needed. In this work, a new innovative e-health cloud-based system is presented that allows a stratification of SCD risk based on the method of natural time entropy variability analysis. This innovative, non-invasive system can be used easily in any setting. The e-health cloud-based system was evaluated using data from a total of 203 individuals, patients with chronic heart failure (CHF) who are at high risk of SCD and age-matched healthy controls. Statistical analysis was performed in two-time windows of different duration; the first-time window had a duration of 20 min, while the second was 10 min. Employing modern methods of machine learning, classifiers for the discrimination of CHF patients from the healthy controls were obtained for the first as well as the second (half-time) window. The results indicated a very good separation between the two groups, even from samples taken in a 10-min time window. Larger studies are needed to further validate this novel e-health cloud-based system before its use in everyday clinical practice.","PeriodicalId":73081,"journal":{"name":"Frontiers in electronics","volume":"43 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138946416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

EMI challenges in modern power electronic-based converters: recent advances and mitigation techniques 现代电力电子转换器中的电磁干扰挑战:最新进展和缓解技术

Frontiers in electronics Pub Date : 2023-11-09 DOI: 10.3389/felec.2023.1274258

Liang Yuan, Jian Zhang, Zheng Liang, Mingxin Hu, Genhua Chen, Wei Lu

{"title":"EMI challenges in modern power electronic-based converters: recent advances and mitigation techniques","authors":"Liang Yuan, Jian Zhang, Zheng Liang, Mingxin Hu, Genhua Chen, Wei Lu","doi":"10.3389/felec.2023.1274258","DOIUrl":"https://doi.org/10.3389/felec.2023.1274258","url":null,"abstract":"The utilization of power electronic-based converters is gaining momentum across a wide spectrum of industries. However, modern power electronic converters operate at higher frequencies compared to conventional power electronic converters, which can lead to higher rates of change in voltage and current during phase switching, and thus potentially produce more severe conducted and radiated electromagnetic interference (EMI). Their electromagnetic compatibility (EMC) has become a critical research topic, and EMI in high-frequency power electronic-based converters is more complex than that in conventional converters. This review presents a comprehensive survey of recent advancements, EMI design, and analysis of modern power electronic-based converters, focusing on the sources and mechanisms of both conducted and radiated EMI, and mitigating techniques. This review also covers the impact of topology optimization, control strategy design, and packaging design on EMC performance. Addressing emerging EMI issues in modern power electronic device-based converters is essential for ensuring safe and reliable operations. Through strategic design optimization and the implementation of EMI mitigation strategies, modern converters can seamlessly be integrated into diverse applications, offering improved EMI performance as a hallmark of their versatility.","PeriodicalId":73081,"journal":{"name":"Frontiers in electronics","volume":" 38","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135291806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two-dimensional semiconductors based field-effect transistors: review of major milestones and challenges 基于二维半导体的场效应晶体管:回顾主要的里程碑和挑战

Frontiers in electronics Pub Date : 2023-11-08 DOI: 10.3389/felec.2023.1277927

Keshari Nandan, Amit Agarwal, Somnath Bhowmick, Yogesh S. Chauhan

{"title":"Two-dimensional semiconductors based field-effect transistors: review of major milestones and challenges","authors":"Keshari Nandan, Amit Agarwal, Somnath Bhowmick, Yogesh S. Chauhan","doi":"10.3389/felec.2023.1277927","DOIUrl":"https://doi.org/10.3389/felec.2023.1277927","url":null,"abstract":"Two-dimensional (2-D) semiconductors are emerging as strong contenders for the future of Angstrom technology nodes. Their potential lies in enhanced device scaling and energy-efficient switching compared to traditional bulk semiconductors like Si, Ge, and III-V compounds. These materials offer significant advantages, particularly in ultra-thin devices with atomic scale thicknesses. Their unique structures enable the creation of one-dimensional nanoribbons and vertical and lateral heterostructures. This versatility in design, coupled with their distinctive properties, paves the way for efficient energy switching in electronic devices. Moreover, 2-D semiconductors offer opportunities for integrating metallic nanoribbons, carbon nanotubes (CNT), and graphene with their 2-D channel materials. This integration helps overcome lithography limitations for gate patterning, allowing the realization of ultra-short gate dimensions. Considering these factors, the potential of 2-D semiconductors in electronics is vast. This concise review focuses on the latest advancements and engineering strategies in 2-D logic devices.","PeriodicalId":73081,"journal":{"name":"Frontiers in electronics","volume":"36 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135430396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measurement and analysis of the electromagnetic environment in 500 kV back-to-back converter stations 500kv背靠背换流站电磁环境的测量与分析

Frontiers in electronics Pub Date : 2023-10-18 DOI: 10.3389/felec.2023.1249007

Zhichao Yang, Qian Li, Peng Zhao, Shanshan Lin, Mingmin Zhao, Yong Ju, Yongwen Gong, Cong Wang

引用次数: 0

Editorial: Re-electrification technology and application of the energy consumption terminal 社论：再电气化技术和能耗终端的应用

Frontiers in electronics Pub Date : 2023-10-13 DOI: 10.3389/felec.2023.1178703

Wei Wang, Zhenya Ji, Haimeng Wu, Z. Jaffery, Yipeng Wu, Ming Xue, Linlin Tan

引用次数: 0

Hybrid neuroelectronics: towards a solution-centric way of thinking about complex problems in neurostimulation tools 混合神经电子学:朝着以解决方案为中心的方式思考神经刺激工具中的复杂问题

Frontiers in electronics Pub Date : 2023-09-12 DOI: 10.3389/felec.2023.1250655

Sofia Drakopoulou, Francesc Varkevisser, Linta Sohail, Masoumeh Aqamolaei, Tiago L. Costa, George D. Spyropoulos

{"title":"Hybrid neuroelectronics: towards a solution-centric way of thinking about complex problems in neurostimulation tools","authors":"Sofia Drakopoulou, Francesc Varkevisser, Linta Sohail, Masoumeh Aqamolaei, Tiago L. Costa, George D. Spyropoulos","doi":"10.3389/felec.2023.1250655","DOIUrl":"https://doi.org/10.3389/felec.2023.1250655","url":null,"abstract":"Responsive neuromodulation is increasingly being used to treat patients with neuropsychiatric diseases. Yet, inefficient bridges between traditional and new materials and technological innovations impede advancements in neurostimulation tools. Signaling in the brain is accomplished predominantly by ion flux rather than the movement of electrons. However, the status quo for the acquisition of neural signals is using materials, such as noble metals, that can only interact with electrons. As a result, ions accumulate at the biotic/abiotic interface, creating a double-layer capacitance that increases impedance and negatively impacts the efficiency of neural interrogation. Alternative materials, such as conducting polymers, allow ion penetration in the matrix, creating a volumetric capacitor (two orders of magnitude larger than an area-dependent capacitor) that lowers the impedance and increases the spatiotemporal resolution of the recording/stimulation. On the other hand, the increased development and integration capabilities of CMOS-based back-end electronics have enabled the creation of increasingly powerful and energy-efficient microchips. These include stimulation and recording systems-on-a-chip (SoCs) with up to tens of thousands of channels, fully integrated circuitry for stimulation, signal conditioning, digitation, wireless power and data telemetry, and on-chip signal processing. Here, we aim to compile information on the best component for each building block and try to strengthen the vision that bridges the gap among various materials and technologies in an effort to advance neurostimulation tools and promote a solution-centric way of considering their complex problems.","PeriodicalId":73081,"journal":{"name":"Frontiers in electronics","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135885543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Topology synthesis of integrated active power decoupling converters using asymmetrical H-bridge circuits 采用不对称H桥电路的集成有源功率去耦变换器的拓扑综合

Frontiers in electronics Pub Date : 2023-09-08 DOI: 10.3389/felec.2023.1250099

Yonglu Liu, Yiqi Zuo, Liang Yuan

引用次数: 0

Lifetime prediction and reliability analysis for aluminum electrolytic capacitors in EV charging module based on mission profiles 基于任务剖面的电动汽车充电模块铝电解电容器寿命预测与可靠性分析

Frontiers in electronics Pub Date : 2023-08-16 DOI: 10.3389/felec.2023.1226006

Hongpeng Liu, Jiahui Qiu, Wei Zhang, Mengyuan Zhang, Z. Dou, Liangliang Chen

{"title":"Lifetime prediction and reliability analysis for aluminum electrolytic capacitors in EV charging module based on mission profiles","authors":"Hongpeng Liu, Jiahui Qiu, Wei Zhang, Mengyuan Zhang, Z. Dou, Liangliang Chen","doi":"10.3389/felec.2023.1226006","DOIUrl":"https://doi.org/10.3389/felec.2023.1226006","url":null,"abstract":"The charging modules of Electric vehicles (EVs) always run in a complex and variable state. As the weakness in the reliable operation of charging modules, the accurate lifetime prediction of aluminum electrolytic capacitors (Al-caps) is important for the later maintenance and reliability design. The hotspot temperature calculation method and lifetime model limit the accuracy of aluminum electrolytic capacitors lifetime prediction methods, which cannot meet the increasing requirements for reliability. In order to solve the problems above, this paper has proposed a hotspot temperature calculation method based on the ripple current with frequency characteristics and the cooling conditions on the heat generation and thermal conductivity of the capacitors. Furthermore, the lifetime model under reference voltage has been constructed with 3D surface fitting toolbox, which describes the trends of capacitor lifetime with ambient temperature and hotspot temperature under the constant voltage condition. Considering the variation of voltage, the multiple lifetime model of capacitor is established with a voltage correction coefficient. With the proposed method, it can be realized about the real-time lifetime prediction of capacitors under multiple operating profiles such as ripple current, thermal dissipation conditions, ambient temperature and operating voltage. Finally, the effectiveness of the proposed method is verified with the annual profiles of a 30 kW EV charging module.","PeriodicalId":73081,"journal":{"name":"Frontiers in electronics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47333068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of inverter-based resources on transmission line relaying -part II: power swing protection 基于逆变器的资源对输电线路继电保护的影响.第二部分：功率摆动保护

Frontiers in electronics Pub Date : 2023-08-10 DOI: 10.3389/felec.2023.1144383

A. Jalilian, D. Robinson

{"title":"Impact of inverter-based resources on transmission line relaying -part II: power swing protection","authors":"A. Jalilian, D. Robinson","doi":"10.3389/felec.2023.1144383","DOIUrl":"https://doi.org/10.3389/felec.2023.1144383","url":null,"abstract":"The power swing characteristic of transmission lines (TLs) can be affected by the large-scale integration of inverter-based resources (IBRs), resulting in the maloperation of the legacy power swing blocking (PSB) and out-of-step tripping (OST) functions. This paper presents a brief review of power swing phenomena and the impact on power swing protection functions. In this regard, the impact of IBR integration of type-III, and type-IV wind turbine generation (WTG) on legacy power swing protection functions has been scrutinized. To do so, the performance of impedance-based PSB and OST functions during the IBR integration has been investigated via comprehensive simulation studies. The results show that under a system contingency and high IBR penetration, depending on the IBR technology, the system experiences frequency oscillations and swinging impedance trajectories which are different from those from synchronous generators, such that the reliable operation of the legacy PSB and OST functions can be jeopardized. Moreover, during power swing phenomena, the simulation results have found that the security of distance protection cannot be guaranteed and the fault ride-through requirements cannot be maintained when a high share of IBRs have been integrated.","PeriodicalId":73081,"journal":{"name":"Frontiers in electronics","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46666680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0