ELEKTRIKA- Journal of Electrical Engineering最新文献_第6页

Wireless Power Transmission Efficiency of Dipole Array Antenna using a Left-Handed Waveguide Slot Antenna as a Feeder 以左波导槽天线为馈线的偶极子阵列天线的无线传输效率

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2022-08-25 DOI: 10.11113/elektrika.v21n2.410

T. Maruyama, Koki Shibata, Masashi Nakatsugawa1, Y. Tamayama, M. Omiya, Tsunayuki Yamamoto, Takahiko Nakamura, Kouzoh Ohshima, M. Muramoto, Yutaka Nasuno, K. Ito

{"title":"Wireless Power Transmission Efficiency of Dipole Array Antenna using a Left-Handed Waveguide Slot Antenna as a Feeder","authors":"T. Maruyama, Koki Shibata, Masashi Nakatsugawa1, Y. Tamayama, M. Omiya, Tsunayuki Yamamoto, Takahiko Nakamura, Kouzoh Ohshima, M. Muramoto, Yutaka Nasuno, K. Ito","doi":"10.11113/elektrika.v21n2.410","DOIUrl":"https://doi.org/10.11113/elektrika.v21n2.410","url":null,"abstract":"This paper proposes to transform microwaves for snow melting, which slightly leaking from the slotted waveguide, into electric power using a wireless power transmission technique for effective use. A combination of left-handed and right-handed waveguides is a method to melt snow evenly over a large area using microwaves. The left-handed waveguide, however, has large loss because of stubs. In order to evaluate the effect of the left-handed waveguide’s loss, this paper analyzed the wireless power transmission efficiency when the left-handed waveguide with a slot was set as the power transmission part, and a dipole array was placed above the left-handed waveguide as a power reception unit. The wireless power transfer efficiency was calculated using kQ product from S-parameters that were obtained by using the method of moments. The results clarified that the sum of the maximum efficiencies of the arrayed dipoles could be made larger than the maximum efficiency of one dipole.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129203817","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: 2

FDTD Analysis on WPT Efficiency Between Circuit-Shape Leaky Waveguide and 𝝀/2 Dipole Antenna for Snow Melting Application 融雪用电路型漏波导与𝝀/2偶极子天线WPT效率的FDTD分析

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2022-08-25 DOI: 10.11113/elektrika.v21n2.409

Yusho Kanaya, M. Nakatsugawa, T. Maruyama, M. Omiya, Y. Tamayama

{"title":"FDTD Analysis on WPT Efficiency Between Circuit-Shape Leaky Waveguide and 𝝀/2 Dipole Antenna for Snow Melting Application","authors":"Yusho Kanaya, M. Nakatsugawa, T. Maruyama, M. Omiya, Y. Tamayama","doi":"10.11113/elektrika.v21n2.409","DOIUrl":"https://doi.org/10.11113/elektrika.v21n2.409","url":null,"abstract":"The wireless transfer characteristics between a circuit-shape leaky waveguide and a /2 dipole antenna were analyzed with scattering parameters obtained with the FDTD method. The circuit-shaped leaky waveguide was composed of two pairs of straight slotted waveguides and two semicircular waveguides. The circuit-shape leaky waveguide was designed to achieve uniform electromagnetic field distribution with a source for snow melting with microwave radiations by microwave heating. The electromagnetic field of the circuit-shape leaky waveguide was firstly simulated with the FDTD method. Although the electromagnetic distribution exhibited the point symmetry with an off-set feeding point and a slot spacing 𝝀𝒈, it was nearly uniform. The wireless transfer efficiency and the maximum transfer efficiency for four locations at 2.45 GHz revealed that the farthest location from the feeding point had the largest WPT efficiency among four locations. This ensures the circuit-shape leaky waveguide’s uniqueness. The circuit-shape leaky waveguide has favorable characteristics to provide WPT energy at any location above it.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124154197","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: 1

Evaluation of Spurious Emission of New System of Wireless Power Transfer 新型无线电力传输系统的杂散发射评估

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2022-04-20 DOI: 10.11113/elektrika.v21n1.374

I. Shirokov, I. Serdyuk, A. Azarov, E. Shirokova

引用次数: 0

Bird Sound Detection with Binarized Neural Networks 基于二值化神经网络的鸟声检测

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2022-04-20 DOI: 10.11113/elektrika.v21n1.349

Muhammad Munim Zabidi, Kah Liang Wong, U. U. Sheikh, Shahidatul Sadiah Abdul Manan, M. A. Hamzah

{"title":"Bird Sound Detection with Binarized Neural Networks","authors":"Muhammad Munim Zabidi, Kah Liang Wong, U. U. Sheikh, Shahidatul Sadiah Abdul Manan, M. A. Hamzah","doi":"10.11113/elektrika.v21n1.349","DOIUrl":"https://doi.org/10.11113/elektrika.v21n1.349","url":null,"abstract":"By analysing the behavioural patterns of bird species in a specific region, researchers can predict future changes in the ecosystem. Many birds can be identified by their sounds, and autonomous recording units (ARUs) can capture real-time bird vocalisations. The recordings are analysed to see if there are any bird sounds. The sound of a bird can be used for further analysis, such as determining its species. Bird sound detection using Deep Neural Networks (DNNs) has been shown to outperform traditional methods. DNNs, however, necessitate a lot of storage and processing power. The use of Binarized Neural Networks (BNNs) is one of the most recent approaches to overcoming this limitation. In this paper, a bird sound detection architecture based on the XNOR-Net variant of BNN is used. Performance analysis of XNOR-Net in terms of the number of hidden layers used was performed, and the configuration with the highest accuracy was built. The system was tested using Xeno-Canto and UrbanSound8K datasets to represent bird and non-bird sounds, respectively. We achieved 96.06 per cent training accuracy and 94.08 per cent validation accuracy. We believe that BNNs are an effective method for detecting bird sounds.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116026288","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: 1

Reverse Engineer 5 Degrees of Freedom Robot Arm using Programmable Logic Controller 利用可编程逻辑控制器逆向工程5自由度机械臂

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2022-04-20 DOI: 10.11113/elektrika.v21n1.348

N. A. Abd Rahman, Z. Aspar

引用次数: 0

A Pilot Study: The Effect of Sunnah Bedtime Routines on the Memorizing and Problem-Solving Skills of University Students 圣行就寝习惯对大学生记忆和问题解决能力影响的初步研究

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2022-04-20 DOI: 10.11113/elektrika.v21n1.359

P. I. Khalid, Mohd Nur Firdaus Abdul Aziz, R. Alik, M. Harun, Norlaili Mat Safri

{"title":"A Pilot Study: The Effect of Sunnah Bedtime Routines on the Memorizing and Problem-Solving Skills of University Students","authors":"P. I. Khalid, Mohd Nur Firdaus Abdul Aziz, R. Alik, M. Harun, Norlaili Mat Safri","doi":"10.11113/elektrika.v21n1.359","DOIUrl":"https://doi.org/10.11113/elektrika.v21n1.359","url":null,"abstract":"Quality sleep is essential to maintain normal levels of cognitive skills. During sleep, electroencephalogram (EEG) is used to study brain activity to detect disorders. However, the effect of Sunnah bedtime routines on the brain cognitive performance is rarely studied. Therefore, this study was conducted to compare the effect of Sunnah bedtime routines on cognitive performance of ten male college students using cortical information pathway. The students were divided into Group 1 (control) and Group 2 (Sunnah bedtime routine). Members of Group 2 performed Sunnah bedtime routines for six weeks whereas members of Group 1 were not assigned to any particular routine. The participants’ memorizing and problem- solving abilities were assessed in the first and final week of the experiment. The subjects’ brain signals were recorded using EEG and Partial Directed Coherence (PDC) was applied to extract the cortical information pathway. The cortical connectivity and test scores between the two groups were compared. Members of Group 2 were shown to perform better than Group 1 in both abilities and EEG analysis show that the two groups were utilizing different parts of the brain region. In conclusion, this study highlighted the probable impact of Sunnah bedtime routines on the two cognitive skills.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133787033","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

Non-invasive Glucometer using Acetone Gas Sensor for Low Income Earners’ Diabetes Monitoring 丙酮气体传感器无创血糖仪用于低收入人群糖尿病监测

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2022-04-20 DOI: 10.11113/elektrika.v21n1.285

T. M. Ajibola, M. O. Ibitoye, Y. Ahmed, Zainab Gbemisola Jimoh

{"title":"Non-invasive Glucometer using Acetone Gas Sensor for Low Income Earners’ Diabetes Monitoring","authors":"T. M. Ajibola, M. O. Ibitoye, Y. Ahmed, Zainab Gbemisola Jimoh","doi":"10.11113/elektrika.v21n1.285","DOIUrl":"https://doi.org/10.11113/elektrika.v21n1.285","url":null,"abstract":"A glucometer is an important device used to monitor blood glucose level of diabetes patients to prevent degenerated health conditions. The conventional glucometers are characterized by piercing of the sample site for patients’ testing. The invasive nature of these glucometers is painful to the patients and some patients are also scared at the sight of blood. To promote glucometer acceptance among patients, it is important to develop a non-invasive glucometer using acetone gas sensor with “exhaled breath” collected non-invasively as the sample for the glucometer. After the device development, exhaled breath sample of twenty subjects with age range of 20 to 55 years from a University were taken using the developed acetone sensor device. Prior to the exhaled breath sample collection, the blood glucose levels of the volunteered subjects were also determined using the conventional and proprietary invasive clinical method. To infer whether there is significant different between the mean of the results obtained from the conventional and the exhaled breath method, a t-test was carried out on the results and P values of 0.9860 and 0.9306 were obtained for fasting blood sugar and random blood sugar respectively, indicating no significant differences in the results obtained from the developed device when compared with the proprietary device. Hence, non-invasive glucometer using acetone gas sensor can be used to promote inexpensive personalized diabetes monitoring without inflicting pain on the patients. Promotion of this device could also reduce the expenses incurred on lancet and test strips, thus, making it suitable for low income earners.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114116104","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

Autonomous Agriculture Robot for Monitoring Plant using Internet of Things 利用物联网监控植物的自主农业机器人

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2022-04-20 DOI: 10.11113/elektrika.v21n1.336

Mohd Ariffanan Mohd Basri, Muhamad Azizi Adnan

引用次数: 1

Performance Analysis of Digital Video Broadcasting - Second Generation Terrestrial (DVB-T2) Propagation for Fixed Reception in The Central Region of Malaysia 马来西亚中部地区用于固定接收的第二代地面数字视频广播(DVB-T2)的性能分析

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2022-04-20 DOI: 10.11113/elektrika.v21n1.355

Ahmad Fesol Mansor, D. Mohd Ali, Yusmardiah Yusuf

{"title":"Performance Analysis of Digital Video Broadcasting - Second Generation Terrestrial (DVB-T2) Propagation for Fixed Reception in The Central Region of Malaysia","authors":"Ahmad Fesol Mansor, D. Mohd Ali, Yusmardiah Yusuf","doi":"10.11113/elektrika.v21n1.355","DOIUrl":"https://doi.org/10.11113/elektrika.v21n1.355","url":null,"abstract":"Due to the increasing demand of services and content, Quality of Service (QoS) has become an important aspect in digital broadcasting industry especially with the implementation of Digital Terrestrial Television (DTT) in Malaysia. Thus, the performance of DVB-T2 in Malaysia should be investigated because there are areas which are not in the coverage due to variety of terrain, where some areas received weak DVB-T2 signals. Apart from geological and topographic factors in Malaysia, the selection of DVB-T2 parameters is also an important factor in determining signal strength and coverage This research has proposed to study the performance analysis of DVB-T2 propagation for fixed reception in Malaysia's central region. The Field Strength Measurement (FSM) was set up to evaluate the QoS of DVB-T2 signal such as Field Strength (E), Modulation Error Ratio (MER), and Carrier to Noise Ratio (C/N) at specific test points across Malaysia's central region. The FSM was simulated at the designated test points using CHIRplus_BC software to evaluate the performance of Single Frequency Network (SFN) at three locations of transmitter. The DVB-T2 Modulation and Forward Error Correction (FEC) code rate parameters were simulated in order to evaluate the improvement in terms of coverage area. It can be concluded that the coverage of DTT is reduced with the increase in the distance of the measurement area to the transmitter. The finding also shows that the field strength value obtained from FSM and simulation was comparable. Furthermore, from the simulation results. it can be perceived that the coverage area across the central region of Malaysia could be improved by optimizing the modulation and FEC code rate. However, there is a trade-off between the signal coverage and channel capacity. The greater the signal coverage the less the channel capacity.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129543713","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

Optimal Sitting and Sizing of Distributed Generators using Pareto-Based Multi-Objective Particle Swarm Optimization for Improving Power System Operation 基于pareto的多目标粒子群优化分布式发电机组布局与规模优化，改善电力系统运行

ELEKTRIKA- Journal of Electrical Engineering Pub Date : 2022-04-20 DOI: 10.11113/elektrika.v21n1.346

Saifulnizam Abd Khalid, Meenuja Arumugam Arumugam, H. Shareef

{"title":"Optimal Sitting and Sizing of Distributed Generators using Pareto-Based Multi-Objective Particle Swarm Optimization for Improving Power System Operation","authors":"Saifulnizam Abd Khalid, Meenuja Arumugam Arumugam, H. Shareef","doi":"10.11113/elektrika.v21n1.346","DOIUrl":"https://doi.org/10.11113/elektrika.v21n1.346","url":null,"abstract":"Utilization of distributed generation (DG) in the distribution network has become trending ever since it has been introduced with proven benefits. DG plays a significant role in improving the quality and quantity as well as the efficiency of the power transmission and distribution system. By allowing smaller generating units to operate in parallel with the main grid, a continuous reliable power supply with lower power loss and higher power output can be achieved. However, improper placement and inappropriate sizing of DG leads to a moderate level performance in terms of power loss and voltage profile. Limited studies have been conducted on mitigating these problems in order to maximize the benefits from DG’s application. To solve this problem, a research is proposed which mainly aims in determining the location and size of DG as well as improving the voltage profile and efficiency of the distribution system significantly. A metaheuristic algorithm called Multi-Objective Particle Swarm Optimization (MOPSO) method is used to simultaneously determine the optimal size and location of DG. To assist the proposed method, Pareto analysis is incorporated to handle conflicting objectives. This method is then tested on the IEEE 14-bus and 33-bus distribution systems under two different conditions which is before and after optimization. The percentage of power loss reduction is calculated and the voltage profile is drawn to compare the output of both conditions. Evaluations from the tests have proven that by using the Pareto-Based MOPSO method, the most optimal size and location of DG in producing an improved voltage profile with lower power loss is identified.","PeriodicalId":312612,"journal":{"name":"ELEKTRIKA- Journal of Electrical Engineering","volume":"128 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130007445","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