Pub Date : 2023-10-05DOI: 10.1080/02564602.2023.2258490
Dipika Singh, Rakhi Garg
AbstractCommunity detection is a well-known area of research that yields essential results in various fields such as social media, biological networks, pandemic spread, recommendation systems, etc. There are two important areas for improvement in existing community detection algorithms: quality of community formed should be improved and a parallel approach to community detection is needed to handle massive data. In this paper, we have proposed a three-step parallel algorithm, Par-Com, using the concept of k Clique and modularity optimization to address both of the above issues. The proposed algorithm increases the execution speed and also improves the quality of the community formed by optimizing modularity. Par-Com uses dynamic load balancing on the multicore architecture of Supercomputer ParamShivay. We have also evaluated Par-Com’s performance against nine sequential and three parallel community detection algorithms on varying size datasets, i.e. karate, macaque, email, immuno, soc-epinions, facebook, and com-Friendster. The experiment result shows that Par-Com outperforms other algorithms under consideration with up to 45% increase in modularity and up to 84% increase in execution speed. Par-Com is also capable of detecting overlapping communities, fuzzy membership of each node, most influential node in each community formed, and outlier nodes. Nodes within a community that have the highest influence are deemed as experts. The choices made by an expert in a particular community are served as recommendations to other users within that community.Keywords: Community detectionmodularity optimizationoverlapping communityparallel computing Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by University Grants Commission.Notes on contributorsDipika SinghDipika Singh received MCA degree from RGPV University, Bhopal in 2011; qualified GATE in computer science and information technology (2012) with 2135 rank; qualified UGC-National Eligibility Test (NET) in computer science and applications (March 2013); qualified GATE in computer science and information technology (2013); awarded Junior Research Fellowship (on July 2018) and subsequently Senior Research Fellowship by the University Grants Commission (UGC), New Delhi, India (2017–2022). Selected as Lecturer, computer science in UPPSC Polytechnic, 2021 (Gazetted).Corresponding author. Email: dipikaa.ssingh@gmail.comRakhi GargRakhi Garg is associate professor in Department of Computer Science, MMV, BHU; qualified UGC-NET for eligibility for lectureship in computer science & applications in Universities/Institutions throughout the country. Done PhD in association rule mining algorithms at Department of Computer Science, Institute of Science, Banaras Hindu University, Varanasi (INDIA). master in computer science from Banaras Hindu University, Varanasi, INDIA, 1995–1997 with 1st division bachelors in computer science from
{"title":"Performance Analysis of a Multicore Approach Proposed for Efficient Community Detection and Recommendation System","authors":"Dipika Singh, Rakhi Garg","doi":"10.1080/02564602.2023.2258490","DOIUrl":"https://doi.org/10.1080/02564602.2023.2258490","url":null,"abstract":"AbstractCommunity detection is a well-known area of research that yields essential results in various fields such as social media, biological networks, pandemic spread, recommendation systems, etc. There are two important areas for improvement in existing community detection algorithms: quality of community formed should be improved and a parallel approach to community detection is needed to handle massive data. In this paper, we have proposed a three-step parallel algorithm, Par-Com, using the concept of k Clique and modularity optimization to address both of the above issues. The proposed algorithm increases the execution speed and also improves the quality of the community formed by optimizing modularity. Par-Com uses dynamic load balancing on the multicore architecture of Supercomputer ParamShivay. We have also evaluated Par-Com’s performance against nine sequential and three parallel community detection algorithms on varying size datasets, i.e. karate, macaque, email, immuno, soc-epinions, facebook, and com-Friendster. The experiment result shows that Par-Com outperforms other algorithms under consideration with up to 45% increase in modularity and up to 84% increase in execution speed. Par-Com is also capable of detecting overlapping communities, fuzzy membership of each node, most influential node in each community formed, and outlier nodes. Nodes within a community that have the highest influence are deemed as experts. The choices made by an expert in a particular community are served as recommendations to other users within that community.Keywords: Community detectionmodularity optimizationoverlapping communityparallel computing Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by University Grants Commission.Notes on contributorsDipika SinghDipika Singh received MCA degree from RGPV University, Bhopal in 2011; qualified GATE in computer science and information technology (2012) with 2135 rank; qualified UGC-National Eligibility Test (NET) in computer science and applications (March 2013); qualified GATE in computer science and information technology (2013); awarded Junior Research Fellowship (on July 2018) and subsequently Senior Research Fellowship by the University Grants Commission (UGC), New Delhi, India (2017–2022). Selected as Lecturer, computer science in UPPSC Polytechnic, 2021 (Gazetted).Corresponding author. Email: dipikaa.ssingh@gmail.comRakhi GargRakhi Garg is associate professor in Department of Computer Science, MMV, BHU; qualified UGC-NET for eligibility for lectureship in computer science & applications in Universities/Institutions throughout the country. Done PhD in association rule mining algorithms at Department of Computer Science, Institute of Science, Banaras Hindu University, Varanasi (INDIA). master in computer science from Banaras Hindu University, Varanasi, INDIA, 1995–1997 with 1st division bachelors in computer science from","PeriodicalId":13252,"journal":{"name":"IETE Technical Review","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135484081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-02DOI: 10.1080/02564602.2023.2262418
Prasanta Kumar Sahoo, Debasis Gountia, Ranjan Kumar Dash, Jahangir Mohammed
AbstractVideo processing is the most emergent area of image processing in Research and Development. This paper, we present some advanced technology interrelated to video and image processing, which will provide a super-resolution high-quality most prominent visible light video for better human visualization and background motions or gesticulations of the human brain. There are two approaches for increasing the current resolution level of an image. The first one is the improvement of spatial resolution by reducing the size of pixels through the techniques of sensor manufacturing by about 40 Mm2 for a 0.35 Mm CMOS process and the second approach is the enhancement of chip size that also enhances the capacitance. In video processing, we mainly focus on object images, i.e. any form of signal processing in which the input is an image and the output is a photograph or a frame of video. So, it will be better to converge over techniques of digital image processing. In the proposed algorithm (MHI Simulink model), edge extraction is performed to find the precious area of MRI and CT-Scan images. Using FPGA, edge detection methods have been implemented over scanned images to get better accuracy. The accuracy of the proposed method has been compared with Prewitt and Sobel’s edge detection techniques. The proposed method has given better accuracy than Prewitt and Sobel methods. Finally, this paper shows future directions for researchers to enhance the characteristics of digital image and video processing.KEYWORDS: CMOSFPGAgesticulationsimage processingmultimediasignal processingsuper resolutionvideo processing Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work has been supported by Microsoft Research [grant #00138000679].Notes on contributorsPrasanta Kumar SahooPrasanta Kumar Sahoo received a bachelor’s degree in computer science and a master’s degree in computer science and engineering from Utkal University, Odisha, India in 2004 and 2014, respectively. He is pursuing a PhD in information technology and engineering at Odisha University of Technology and Research (O. U. T. R.), Odisha, India. His current research interest includes artificial intelligence, image processing, machine learning, cellular automata, and algorithm designing. He has authored 2 internationally referred journals, 1 conference proceedings, and prepared many research articles in the aforementioned areas. Email: mrprasantasahoo@gmail.comDebasis GountiaDebasis Gountia received the Mtech degree in computer science and engineering (CSE) from the Indian Institute of Technology (IIT) Kharagpur, India. He received the Btech degree in CSE from the UCE Burla, India. He received a PhD award in CSE from the IIT Roorkee, India after being recommended and highly praised by Ritsumeikan University Japan and North Texas University USA. He has over 20 years of teaching and research experience in various organizations. His research inte
{"title":"A Technical Analysis of Digital Image and Video Processing","authors":"Prasanta Kumar Sahoo, Debasis Gountia, Ranjan Kumar Dash, Jahangir Mohammed","doi":"10.1080/02564602.2023.2262418","DOIUrl":"https://doi.org/10.1080/02564602.2023.2262418","url":null,"abstract":"AbstractVideo processing is the most emergent area of image processing in Research and Development. This paper, we present some advanced technology interrelated to video and image processing, which will provide a super-resolution high-quality most prominent visible light video for better human visualization and background motions or gesticulations of the human brain. There are two approaches for increasing the current resolution level of an image. The first one is the improvement of spatial resolution by reducing the size of pixels through the techniques of sensor manufacturing by about 40 Mm2 for a 0.35 Mm CMOS process and the second approach is the enhancement of chip size that also enhances the capacitance. In video processing, we mainly focus on object images, i.e. any form of signal processing in which the input is an image and the output is a photograph or a frame of video. So, it will be better to converge over techniques of digital image processing. In the proposed algorithm (MHI Simulink model), edge extraction is performed to find the precious area of MRI and CT-Scan images. Using FPGA, edge detection methods have been implemented over scanned images to get better accuracy. The accuracy of the proposed method has been compared with Prewitt and Sobel’s edge detection techniques. The proposed method has given better accuracy than Prewitt and Sobel methods. Finally, this paper shows future directions for researchers to enhance the characteristics of digital image and video processing.KEYWORDS: CMOSFPGAgesticulationsimage processingmultimediasignal processingsuper resolutionvideo processing Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work has been supported by Microsoft Research [grant #00138000679].Notes on contributorsPrasanta Kumar SahooPrasanta Kumar Sahoo received a bachelor’s degree in computer science and a master’s degree in computer science and engineering from Utkal University, Odisha, India in 2004 and 2014, respectively. He is pursuing a PhD in information technology and engineering at Odisha University of Technology and Research (O. U. T. R.), Odisha, India. His current research interest includes artificial intelligence, image processing, machine learning, cellular automata, and algorithm designing. He has authored 2 internationally referred journals, 1 conference proceedings, and prepared many research articles in the aforementioned areas. Email: mrprasantasahoo@gmail.comDebasis GountiaDebasis Gountia received the Mtech degree in computer science and engineering (CSE) from the Indian Institute of Technology (IIT) Kharagpur, India. He received the Btech degree in CSE from the UCE Burla, India. He received a PhD award in CSE from the IIT Roorkee, India after being recommended and highly praised by Ritsumeikan University Japan and North Texas University USA. He has over 20 years of teaching and research experience in various organizations. His research inte","PeriodicalId":13252,"journal":{"name":"IETE Technical Review","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135900245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-21DOI: 10.1080/02564602.2023.2260345
Ramesh Amugothu, Vakula Damera
AbstractA novel compact microwave metamaterial absorber structure with a wide bandwidth is proposed. The absorber structure is designed on an FR4 substrate with a 2.4 mm thickness. The metamaterial absorber unit cell design consists of a combination of W and S-shaped structures in which splits are incorporated to have the effect of a split ring resonator. The proposed unit cell structure is designed to have a wide absorption band, which includes the X and Ku frequency bands. The optimized dimension of the unit cell is 0.071 λ0 × 0.71 λ0 where λ0 is the wavelength of the center frequency of the absorption band. The WS-shaped structures are oriented to absorb TE and TM waves for a wide range of polarization angles. The simulation results of the unit cell have shown absorption above 95% from 10.48 to 13.28 GHz. In addition, the absorber has an efficiency above 92% for incidence angles from 0° to 60° for fixed polarization. The unit cell structure and array are fabricated, and measurements are performed. The simulation and measured results have shown good agreement. The proposed metamaterial can be used in defense and radar surveillance applications.KEYWORDS: Metamaterial absorberPolarizationPolarization insensitiveSplit ring resonatorWideband Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsRamesh AmugothuRamesh Amugothu received his Btech degree in electronics and communication engineering from Jawaharlal Nehru Technological University in Hyderabad, India, in 2013, and an Mtech degree in the department of electronics and communication engineering from the National Institute of Technology Surathkal, India, in 2016. Currently, he is pursuing his PhD degree in the department of electronics and communication engineering at the National Institute of Technology, Warangal, India. He has over 3 year’s research/academic experience. He is an IEEE student member, voice chair for IEEE-MTT and IEEE-APS at NIT Warangal, India. Corresponding author. Email: ar720057@student.nitw.ac.inVakula DameraVakula Damera received a bachelor’s degree in electronics and communication engineering from Nagarjuna University, Andhra Pradesh, India. And a master’s degree from the Birla Institute of Technology, Mesra, India. With a focus on microwave specialization in 1992 and 1994, respectively, and a PhD degree in fault diagnostics of antenna arrays from the National Institute of Technology, Warangal, India, in 2010. She is a professor at the National Institute of Technology, Warangal. She has authored 81 papers for international conferences and journals. Her areas of interest include phase array antennas, ultra-wideband antennas, multiband antennas, fault diagnostics, neural networks, and metamaterials. She has over 30 years research/academic experience in the areas of RF and microwave systems/components and has executed over 15 projects sponsored by DST/AICTE/MHRD or Other Sponsored R&D project. Email:
{"title":"A Wideband DNG Metamaterial Absorber with WS-Shaped Split Ring Resonator for X- and Ku- Frequency Band Applications","authors":"Ramesh Amugothu, Vakula Damera","doi":"10.1080/02564602.2023.2260345","DOIUrl":"https://doi.org/10.1080/02564602.2023.2260345","url":null,"abstract":"AbstractA novel compact microwave metamaterial absorber structure with a wide bandwidth is proposed. The absorber structure is designed on an FR4 substrate with a 2.4 mm thickness. The metamaterial absorber unit cell design consists of a combination of W and S-shaped structures in which splits are incorporated to have the effect of a split ring resonator. The proposed unit cell structure is designed to have a wide absorption band, which includes the X and Ku frequency bands. The optimized dimension of the unit cell is 0.071 λ0 × 0.71 λ0 where λ0 is the wavelength of the center frequency of the absorption band. The WS-shaped structures are oriented to absorb TE and TM waves for a wide range of polarization angles. The simulation results of the unit cell have shown absorption above 95% from 10.48 to 13.28 GHz. In addition, the absorber has an efficiency above 92% for incidence angles from 0° to 60° for fixed polarization. The unit cell structure and array are fabricated, and measurements are performed. The simulation and measured results have shown good agreement. The proposed metamaterial can be used in defense and radar surveillance applications.KEYWORDS: Metamaterial absorberPolarizationPolarization insensitiveSplit ring resonatorWideband Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsRamesh AmugothuRamesh Amugothu received his Btech degree in electronics and communication engineering from Jawaharlal Nehru Technological University in Hyderabad, India, in 2013, and an Mtech degree in the department of electronics and communication engineering from the National Institute of Technology Surathkal, India, in 2016. Currently, he is pursuing his PhD degree in the department of electronics and communication engineering at the National Institute of Technology, Warangal, India. He has over 3 year’s research/academic experience. He is an IEEE student member, voice chair for IEEE-MTT and IEEE-APS at NIT Warangal, India. Corresponding author. Email: ar720057@student.nitw.ac.inVakula DameraVakula Damera received a bachelor’s degree in electronics and communication engineering from Nagarjuna University, Andhra Pradesh, India. And a master’s degree from the Birla Institute of Technology, Mesra, India. With a focus on microwave specialization in 1992 and 1994, respectively, and a PhD degree in fault diagnostics of antenna arrays from the National Institute of Technology, Warangal, India, in 2010. She is a professor at the National Institute of Technology, Warangal. She has authored 81 papers for international conferences and journals. Her areas of interest include phase array antennas, ultra-wideband antennas, multiband antennas, fault diagnostics, neural networks, and metamaterials. She has over 30 years research/academic experience in the areas of RF and microwave systems/components and has executed over 15 projects sponsored by DST/AICTE/MHRD or Other Sponsored R&D project. Email:","PeriodicalId":13252,"journal":{"name":"IETE Technical Review","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136236962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AbstractIn this manuscript, a new vertically stacked GaSb-source stepped oxide split-pocket vertical dielectrically modulated tunnel field effect transistor (SOSPVDMTFET) is presented for the first time. The novelty of this device lies in its stepped oxides with full gate length cavity and n + split-pockets in source region. These design features significantly suppress the ambipolar current at drain/channel junction and improves the drain current (ION), subthreshold swing (SS), threshold voltage (Vth), and current ratio (Iratio). In addition, it enhances the RF parameters such as transconductance (gm), maximum cut-off frequency (fT), transit time (τ), and device efficiency. It is found that the drain current sensitivity of the proposed device is 3000 times higher than the work reported in [Theja and Panchore, “Performance investigation of GaSb/Si heterojunction based gate underlap and overlap vertical TFET biosensor,” IEEE Trans. Nano Biosci., Vol. 22, no. 2, pp. 284–91, 2022]. Further, the behavior of biomolecules at different subcavity regions (R1, R2, R3) and cavity thickness has been investigated. The effect of non uniform distribution of biomolecule in cavity region is also discussed.KEYWORDS: Ambipolaritybiosensorstepped oxide (SO)split-pocket (SP)GaSb-source Stepped Oxide Split-Pocket Vertical Biosensor (SOSPVB) ACKNOWLEDGEMENTSThe authors would like to thank Dr. Shivendra Yadav from Department of Electronics Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, India for providing valuable suggestions and support to carry out this research work.DISCLOSURE STATEMENTNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsMadhulika VermaMadhulika Verma is currently pursuing the PhD degree with the ECE department from National Institute of Technology Delhi. She has completed her Mtech in micro-nano electronics (ECE) from PDPM IIITDM Jabalpur in 2017, and Btech in ECE from the IPEC Ghaziabad in 2013. Her area of interest is nanoscale devices and their biosensor applications. Email: madhulika53@nitdelhi.ac.inSachin AgrawalSachin Agrawal completed his PhD from IIITDM Jabalpur in 2018. He has completed his ME from Birla Institute of Technology Pilani, India in 2009. Currently, he is working as an assistant professor at National Institute of Technology Delhi. His area of interest is RF energy harvesting, antenna designing and mobile communication. SujalSujal is currently pursuing a Btech degree in electronics and communication engineering from National Institute of Technology Delhi, India (2020–2024). His current research interests include TFET. Email: 201220045@nitdelhi.ac.inMohit MeenaMohit Meena is currently pursuing a Btech degree in electronics and communication engineering from National Institute of Technology Delhi, India (2020–2024). His current research interests include TFET. Email: 201220029@nitdelhi.ac.in
{"title":"Vertically Stacked Stepped Oxide Split-Pocket VTFET as a Label Free Biosensor","authors":"Madhulika Verma, Sachin Agrawal, None Sujal, Mohit Meena","doi":"10.1080/02564602.2023.2258502","DOIUrl":"https://doi.org/10.1080/02564602.2023.2258502","url":null,"abstract":"AbstractIn this manuscript, a new vertically stacked GaSb-source stepped oxide split-pocket vertical dielectrically modulated tunnel field effect transistor (SOSPVDMTFET) is presented for the first time. The novelty of this device lies in its stepped oxides with full gate length cavity and n + split-pockets in source region. These design features significantly suppress the ambipolar current at drain/channel junction and improves the drain current (ION), subthreshold swing (SS), threshold voltage (Vth), and current ratio (Iratio). In addition, it enhances the RF parameters such as transconductance (gm), maximum cut-off frequency (fT), transit time (τ), and device efficiency. It is found that the drain current sensitivity of the proposed device is 3000 times higher than the work reported in [Theja and Panchore, “Performance investigation of GaSb/Si heterojunction based gate underlap and overlap vertical TFET biosensor,” IEEE Trans. Nano Biosci., Vol. 22, no. 2, pp. 284–91, 2022]. Further, the behavior of biomolecules at different subcavity regions (R1, R2, R3) and cavity thickness has been investigated. The effect of non uniform distribution of biomolecule in cavity region is also discussed.KEYWORDS: Ambipolaritybiosensorstepped oxide (SO)split-pocket (SP)GaSb-source Stepped Oxide Split-Pocket Vertical Biosensor (SOSPVB) ACKNOWLEDGEMENTSThe authors would like to thank Dr. Shivendra Yadav from Department of Electronics Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, India for providing valuable suggestions and support to carry out this research work.DISCLOSURE STATEMENTNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsMadhulika VermaMadhulika Verma is currently pursuing the PhD degree with the ECE department from National Institute of Technology Delhi. She has completed her Mtech in micro-nano electronics (ECE) from PDPM IIITDM Jabalpur in 2017, and Btech in ECE from the IPEC Ghaziabad in 2013. Her area of interest is nanoscale devices and their biosensor applications. Email: madhulika53@nitdelhi.ac.inSachin AgrawalSachin Agrawal completed his PhD from IIITDM Jabalpur in 2018. He has completed his ME from Birla Institute of Technology Pilani, India in 2009. Currently, he is working as an assistant professor at National Institute of Technology Delhi. His area of interest is RF energy harvesting, antenna designing and mobile communication. SujalSujal is currently pursuing a Btech degree in electronics and communication engineering from National Institute of Technology Delhi, India (2020–2024). His current research interests include TFET. Email: 201220045@nitdelhi.ac.inMohit MeenaMohit Meena is currently pursuing a Btech degree in electronics and communication engineering from National Institute of Technology Delhi, India (2020–2024). His current research interests include TFET. Email: 201220029@nitdelhi.ac.in","PeriodicalId":13252,"journal":{"name":"IETE Technical Review","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136236957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-19DOI: 10.1080/02564602.2023.2258494
Nisha Thanua, Ganesh B. Kumbhar
AbstractThe present article provides a comprehensive analysis of the aging phenomenon of transformer insulation and the corresponding changes in insulation performance that occur over time. The present manuscript outlines diverse insulating materials that are employed in transformers, the fundamental aging mechanism of the insulation, the function of space charges in the aging of the insulation, and various simulation methodologies utilized for diagnosing the insulation status of the transformer. The primary focus of this paper is to examine the various numerical techniques employed in modeling and analyzing the aging characteristics of transformer insulation. The mechanisms underlying the accumulation of charge and distortion of electric fields in insulation are explained through the utilization of numerical modeling techniques. This paper focuses on understanding the mechanism of insulation aging, thereby facilitating the optimization and maintenance of insulation performance throughout its operational lifespan.Keywords: Bipolar charge transport modelElectric fieldFinite element methodOil-paper insulationPlasma modelPower transformerSpace charges Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsNisha ThanuaNisha Thanua received her BTech and MTech degrees in electrical engineering from Aligarh Muslim University, Aligarh, India, in 2014 and 2017, respectively. Currently, she is a PhD candidate at the Department of Electrical Engineering of the Indian Institute of Technology Roorkee. Her research interests are transformer insulation aging, condition monitoring of transformers, multiphysics modeling, electrical insulation materials, computational electromagnetics, numerical techniques in electrostatics, and high-voltage engineering. Corresponding author. Email: nthanua@ee.iitr.ac.inGanesh B. KumbharGanesh B Kumbhar received the BE degree in electrical engineering from the Government College of Engineering, Karad, India, in 1999, the MTech degree from the Indian Institute of Technology Madras, Chennai, India, in 2002, and the PhD degree from the Indian Institute of Technology Bombay, Mumbai, India, in 2007. He was a postdoctoral research scholar with the Center for Energy System Research, Tennessee Technological University, Cookeville, TN, USA.Hewas also with Eaton Technologies Pvt. Ltd., (Eaton Corporation), Pune, India; Tata Consultancy Services, Mumbai, India; and Crompton Greaves, Ltd., Mumbai, India. He is currently an associate professor with the Department of Electrical Engineering, Indian Institute of Technology Roorkee, Roorkee, India. His research interests include high-voltage engineering, electromagnetic design and analysis of power apparatus, computational electromagnetics, and coupled-field modeling and simulations. Email: ganesh.kumbhar@ee.iitr.ac.in
{"title":"Analyzing the Performance of Transformer Oil-Paper Insulation with Aging Using Numerical Simulation Technique – A Review","authors":"Nisha Thanua, Ganesh B. Kumbhar","doi":"10.1080/02564602.2023.2258494","DOIUrl":"https://doi.org/10.1080/02564602.2023.2258494","url":null,"abstract":"AbstractThe present article provides a comprehensive analysis of the aging phenomenon of transformer insulation and the corresponding changes in insulation performance that occur over time. The present manuscript outlines diverse insulating materials that are employed in transformers, the fundamental aging mechanism of the insulation, the function of space charges in the aging of the insulation, and various simulation methodologies utilized for diagnosing the insulation status of the transformer. The primary focus of this paper is to examine the various numerical techniques employed in modeling and analyzing the aging characteristics of transformer insulation. The mechanisms underlying the accumulation of charge and distortion of electric fields in insulation are explained through the utilization of numerical modeling techniques. This paper focuses on understanding the mechanism of insulation aging, thereby facilitating the optimization and maintenance of insulation performance throughout its operational lifespan.Keywords: Bipolar charge transport modelElectric fieldFinite element methodOil-paper insulationPlasma modelPower transformerSpace charges Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsNisha ThanuaNisha Thanua received her BTech and MTech degrees in electrical engineering from Aligarh Muslim University, Aligarh, India, in 2014 and 2017, respectively. Currently, she is a PhD candidate at the Department of Electrical Engineering of the Indian Institute of Technology Roorkee. Her research interests are transformer insulation aging, condition monitoring of transformers, multiphysics modeling, electrical insulation materials, computational electromagnetics, numerical techniques in electrostatics, and high-voltage engineering. Corresponding author. Email: nthanua@ee.iitr.ac.inGanesh B. KumbharGanesh B Kumbhar received the BE degree in electrical engineering from the Government College of Engineering, Karad, India, in 1999, the MTech degree from the Indian Institute of Technology Madras, Chennai, India, in 2002, and the PhD degree from the Indian Institute of Technology Bombay, Mumbai, India, in 2007. He was a postdoctoral research scholar with the Center for Energy System Research, Tennessee Technological University, Cookeville, TN, USA.Hewas also with Eaton Technologies Pvt. Ltd., (Eaton Corporation), Pune, India; Tata Consultancy Services, Mumbai, India; and Crompton Greaves, Ltd., Mumbai, India. He is currently an associate professor with the Department of Electrical Engineering, Indian Institute of Technology Roorkee, Roorkee, India. His research interests include high-voltage engineering, electromagnetic design and analysis of power apparatus, computational electromagnetics, and coupled-field modeling and simulations. Email: ganesh.kumbhar@ee.iitr.ac.in","PeriodicalId":13252,"journal":{"name":"IETE Technical Review","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135107444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
AbstractThis paper presents a modified rectangular microstrip patch antenna (MRMPA) array conforming to the hemisphere for wide-angle beam scanning. Two different conformal antenna array designs are presented in this work. The first of these designs, a 13-element MRMPA array conformal to the surface of a circular arc, and the second one, a 9-element array conformal to the surface of a hemisphere, are designed and optimized. The geometrical approach of calculating the phase value is used to calculate the phase value of each antenna. The simulated results show that the 13-element conformal MRMPA array is achieving a beam scanning angle of ±84° with a gain of 13.89 dBi with low side lobe levels, and further, the gain of the array is enhanced by a dielectric superstrate that improved the gain by ∼2 dBi at all the scanning angles. Second, an MRMPA array conformal to a hemisphere with nine elements is designed with beam scanning ability from φ = 0°−360° and θ = ±30° with a gain of 15.69 dBi, and further, the gain is enhanced by ∼3 dBi with the dielectric superstrate. Full-wave simulations have proven both designs to be accurate and aligned with theoretical calculations.KEYWORDS: Antenna arraysBeam scanningmmWaveScan lossSuperstrate ACKNOWLEDGMENTThe authors would like to thank IIIT Naya Raipur for providing support.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsAnil Kumar YerrolaAnil Kumar Yerrola, received BTech degree in electronics communication engineering from VNR Vignana Jyothi Institute of Engineering and Technology, Hyderabad, T.S, and MTech degree in VLSI systems design from JNTUH, Hyderabad, Telangana, India in 2009 and 2013 respectively. Having 6 years of teaching experience currently he is working toward his PhD degree at Dr. SPM International Institute of Information Technology, Naya Raipur. His research interests include mm-wave antennas, beam forming networks and electromagnetic fields. Corresponding author. Email: anil@iiitnr.edu.inMaifuz AliMaifuz Ali was born in Sabalmara, West- Midna pure, India. He received PhD degree in electronics and electrical communication engineering from Indian Institute of Technology, Kharagpur, India, in 2010. He received the Brain Korea Research Fellowship in 2010 and was a postdoctoral researcher at the Korea Advanced Institute of Science and Technology, Daejeon, Korea, until 2012. Since 2012, he has been a postdoctoral researcher at the Tokyo Institute of Technology, Tokyo, Japan. He is a member of IEEE His main research interests include high-frequency diffraction theory, such as physical optics and geometrical theory of diffraction. His research also covers the design of reflector antennae, electromagnetic field sensors, wireless channel modeling, and antenna. Email: maifuzali@iiitnr.edu.inRavi Kumar AryaRavi Kumar Arya is a distinguished professor at Xiangshan Laboratory (XSL), Zhongshan Institute of Changchun University o
{"title":"Wide-Angle Scanning Microstrip Patch Antenna Array for mmWave Applications with High Gain","authors":"Anil Kumar Yerrola, Maifuz Ali, Ravi Kumar Arya, Lakhindar Murmu, Ashwani Kumar","doi":"10.1080/02564602.2023.2255544","DOIUrl":"https://doi.org/10.1080/02564602.2023.2255544","url":null,"abstract":"AbstractThis paper presents a modified rectangular microstrip patch antenna (MRMPA) array conforming to the hemisphere for wide-angle beam scanning. Two different conformal antenna array designs are presented in this work. The first of these designs, a 13-element MRMPA array conformal to the surface of a circular arc, and the second one, a 9-element array conformal to the surface of a hemisphere, are designed and optimized. The geometrical approach of calculating the phase value is used to calculate the phase value of each antenna. The simulated results show that the 13-element conformal MRMPA array is achieving a beam scanning angle of ±84° with a gain of 13.89 dBi with low side lobe levels, and further, the gain of the array is enhanced by a dielectric superstrate that improved the gain by ∼2 dBi at all the scanning angles. Second, an MRMPA array conformal to a hemisphere with nine elements is designed with beam scanning ability from φ = 0°−360° and θ = ±30° with a gain of 15.69 dBi, and further, the gain is enhanced by ∼3 dBi with the dielectric superstrate. Full-wave simulations have proven both designs to be accurate and aligned with theoretical calculations.KEYWORDS: Antenna arraysBeam scanningmmWaveScan lossSuperstrate ACKNOWLEDGMENTThe authors would like to thank IIIT Naya Raipur for providing support.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationNotes on contributorsAnil Kumar YerrolaAnil Kumar Yerrola, received BTech degree in electronics communication engineering from VNR Vignana Jyothi Institute of Engineering and Technology, Hyderabad, T.S, and MTech degree in VLSI systems design from JNTUH, Hyderabad, Telangana, India in 2009 and 2013 respectively. Having 6 years of teaching experience currently he is working toward his PhD degree at Dr. SPM International Institute of Information Technology, Naya Raipur. His research interests include mm-wave antennas, beam forming networks and electromagnetic fields. Corresponding author. Email: anil@iiitnr.edu.inMaifuz AliMaifuz Ali was born in Sabalmara, West- Midna pure, India. He received PhD degree in electronics and electrical communication engineering from Indian Institute of Technology, Kharagpur, India, in 2010. He received the Brain Korea Research Fellowship in 2010 and was a postdoctoral researcher at the Korea Advanced Institute of Science and Technology, Daejeon, Korea, until 2012. Since 2012, he has been a postdoctoral researcher at the Tokyo Institute of Technology, Tokyo, Japan. He is a member of IEEE His main research interests include high-frequency diffraction theory, such as physical optics and geometrical theory of diffraction. His research also covers the design of reflector antennae, electromagnetic field sensors, wireless channel modeling, and antenna. Email: maifuzali@iiitnr.edu.inRavi Kumar AryaRavi Kumar Arya is a distinguished professor at Xiangshan Laboratory (XSL), Zhongshan Institute of Changchun University o","PeriodicalId":13252,"journal":{"name":"IETE Technical Review","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135783998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-12DOI: 10.1080/02564602.2023.2255553
Sachin Agrawal, Manoj Singh Parihar
A printed monopole super wideband (SWB) antenna is presented in this paper. It consists of a beveled-shaped radiator and a tapered ground plane. It is investigated that tapering of the radiator and ground plane enhances the impedance matching and results in broad impedance bandwidth. The experimental result depicts that the antenna achieved 164.9% impedance bandwidth from 2.6 to 27.27 GHz. Furthermore, to prevent the interference caused by communication systems within the ultra-wideband (UWB) range, dual-band rejection at Wi-MAX (2.7–4 GHz). and X-band (8.5–12 GHz) are introduced by etching an H-shape and two back-to-back C-shaped notches in the radiator and feedline, respectively. The measured result demonstrates that both slots effectively reject the desired frequency bands with a small shift in the lower frequency edge from 2.41 to 2.6 GHz. In addition, the proposed antenna application is shown in the two elements MIMO system where a bowtie decoupling structure is utilized to improve the isolation. It is found that the presence of a decoupling structure improves the isolation by up to 60%. To characterize the diversity performance, parameters such as Diversity Gain (DG), Envelop Correlation Coefficient (ECC), Channel Capacity Loss (CCL), and Mean Effective Gain (MEG) are calculated and all are found in the acceptable limit.
{"title":"The Design and Investigation of a Super Wideband Antenna with Dual-Band Notch Characteristics for MIMO Application","authors":"Sachin Agrawal, Manoj Singh Parihar","doi":"10.1080/02564602.2023.2255553","DOIUrl":"https://doi.org/10.1080/02564602.2023.2255553","url":null,"abstract":"A printed monopole super wideband (SWB) antenna is presented in this paper. It consists of a beveled-shaped radiator and a tapered ground plane. It is investigated that tapering of the radiator and ground plane enhances the impedance matching and results in broad impedance bandwidth. The experimental result depicts that the antenna achieved 164.9% impedance bandwidth from 2.6 to 27.27 GHz. Furthermore, to prevent the interference caused by communication systems within the ultra-wideband (UWB) range, dual-band rejection at Wi-MAX (2.7–4 GHz). and X-band (8.5–12 GHz) are introduced by etching an H-shape and two back-to-back C-shaped notches in the radiator and feedline, respectively. The measured result demonstrates that both slots effectively reject the desired frequency bands with a small shift in the lower frequency edge from 2.41 to 2.6 GHz. In addition, the proposed antenna application is shown in the two elements MIMO system where a bowtie decoupling structure is utilized to improve the isolation. It is found that the presence of a decoupling structure improves the isolation by up to 60%. To characterize the diversity performance, parameters such as Diversity Gain (DG), Envelop Correlation Coefficient (ECC), Channel Capacity Loss (CCL), and Mean Effective Gain (MEG) are calculated and all are found in the acceptable limit.","PeriodicalId":13252,"journal":{"name":"IETE Technical Review","volume":"77 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":"135886203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-23DOI: 10.1080/02564602.2023.2244826
Mamidala Jagadesh Kumar
The Indian Institutes of Technology (IITs) have played a pivotal role in shaping the India’s education landscape, particularly in technical education. With decades of experience and rich contributions, IITs have been adapting to meet the changing demands of the educational needs in India. Implementing the National Education Policy (NEP-2020) has opened up new avenues for IITs to further their impact on higher education in the country. This editorial explores how IITs are embracing NEP2020 and introducing significant reforms to create a more inclusive, multidisciplinary, and transformative educational system.
{"title":"Editorial","authors":"Mamidala Jagadesh Kumar","doi":"10.1080/02564602.2023.2244826","DOIUrl":"https://doi.org/10.1080/02564602.2023.2244826","url":null,"abstract":"The Indian Institutes of Technology (IITs) have played a pivotal role in shaping the India’s education landscape, particularly in technical education. With decades of experience and rich contributions, IITs have been adapting to meet the changing demands of the educational needs in India. Implementing the National Education Policy (NEP-2020) has opened up new avenues for IITs to further their impact on higher education in the country. This editorial explores how IITs are embracing NEP2020 and introducing significant reforms to create a more inclusive, multidisciplinary, and transformative educational system.","PeriodicalId":13252,"journal":{"name":"IETE Technical Review","volume":"40 1","pages":"609 - 610"},"PeriodicalIF":2.4,"publicationDate":"2023-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43328531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-21DOI: 10.1080/02564602.2023.2246426
A. Nechibvute, H. Mafukidze
{"title":"Integration of SCADA and Industrial IoT: Opportunities and Challenges","authors":"A. Nechibvute, H. Mafukidze","doi":"10.1080/02564602.2023.2246426","DOIUrl":"https://doi.org/10.1080/02564602.2023.2246426","url":null,"abstract":"","PeriodicalId":13252,"journal":{"name":"IETE Technical Review","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2023-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49252177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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