Pub Date : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130239
E. Halasová, Barbara Tóthová, M. Sivoňová, Terézia Okajčeková, Henrieta Skovierová, P. Spánik, M. Pavelek, M. Frivaldský
Novel technologies based on the emission of electromagnetic field (EMF) are spreading intensively and so as the public concerns about their possible health risks. Because the most adverse effects and carcinogenic influences are generally associated with extremely low EMF and radiofrequency, the majority of in vitro and in vivo studies is focused on cellular responses activated under these conditions. Only few studies had been realized on the biological effects or health risks of intermediate frequency (IF) fields. In this study, SH-SY5Y and T98G cell lines were exposed to 86 kHz IF-EMF for 30 minutes at 3 mT or 1.5 mT, respectively. To analyze IF- EMF impact on metabolic and mitotic activity of human neural cells, various biochemical and biological methods were used. IF- EMF exposure did not induce any significant changes in cell viability and proliferation as well as in DNA damage. Our results suggest that the possibility of acute long-term exposure in wireless power transfer devices with the properties of 86 kHz and 3 mT (i.e. 1.5 mT) is not harmful and does not cause cell stress responses.
{"title":"Effect of acute intermediate frequency electromagnetic field exposure on human neural cells","authors":"E. Halasová, Barbara Tóthová, M. Sivoňová, Terézia Okajčeková, Henrieta Skovierová, P. Spánik, M. Pavelek, M. Frivaldský","doi":"10.1109/ELEKTRO49696.2020.9130239","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130239","url":null,"abstract":"Novel technologies based on the emission of electromagnetic field (EMF) are spreading intensively and so as the public concerns about their possible health risks. Because the most adverse effects and carcinogenic influences are generally associated with extremely low EMF and radiofrequency, the majority of in vitro and in vivo studies is focused on cellular responses activated under these conditions. Only few studies had been realized on the biological effects or health risks of intermediate frequency (IF) fields. In this study, SH-SY5Y and T98G cell lines were exposed to 86 kHz IF-EMF for 30 minutes at 3 mT or 1.5 mT, respectively. To analyze IF- EMF impact on metabolic and mitotic activity of human neural cells, various biochemical and biological methods were used. IF- EMF exposure did not induce any significant changes in cell viability and proliferation as well as in DNA damage. Our results suggest that the possibility of acute long-term exposure in wireless power transfer devices with the properties of 86 kHz and 3 mT (i.e. 1.5 mT) is not harmful and does not cause cell stress responses.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114693457","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}
Pub Date : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130275
A. Merfeldas, P. Kuzas, D. Gailius, Ž. Nakutis, M. Knyva, A. Valinevicius, D. Andriukaitis, M. Zilys, D. Navikas
In this paper, the improved near-field probe power radiation profile investigated. The modelling of the electromagnetic field strength in 80-3000 MHz frequency range in the proximity of the near-field probe was performed. The -6 dB aperture boundaries of the magnetic near-field probe were determined for adaptive scanning height systems in the distance range of 1-15 mm for both X and Z axis. The simulation of improved near-field probe absolute magnetic field strength distribution reference map in open-air conditions is carried out in this work and approximation by 9th order polynomial function proposed for radiated susceptibility maps post-processing and hotspot localization improvement.
{"title":"Near-field Probe Radiation Profile Boundaries Assessment for Optimal Radiated RF Power Susceptibility Pre-mapping","authors":"A. Merfeldas, P. Kuzas, D. Gailius, Ž. Nakutis, M. Knyva, A. Valinevicius, D. Andriukaitis, M. Zilys, D. Navikas","doi":"10.1109/ELEKTRO49696.2020.9130275","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130275","url":null,"abstract":"In this paper, the improved near-field probe power radiation profile investigated. The modelling of the electromagnetic field strength in 80-3000 MHz frequency range in the proximity of the near-field probe was performed. The -6 dB aperture boundaries of the magnetic near-field probe were determined for adaptive scanning height systems in the distance range of 1-15 mm for both X and Z axis. The simulation of improved near-field probe absolute magnetic field strength distribution reference map in open-air conditions is carried out in this work and approximation by 9th order polynomial function proposed for radiated susceptibility maps post-processing and hotspot localization improvement.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125662367","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}
Pub Date : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130332
B. Skala, V. Kindl, L. Poláček, P. Turjanica, Ales Vobornik, J. Valenta, Vojtech Bachura
The paper proposes design procedure of several types of current sensors. The winding design is analyzed regarding its impact on operational characteristics and evaluated for preferred application. The paper also discusses the measurement results and given frequency characteristic and quality factors of the laboratory prototypes.
{"title":"Design of Current Sensor for Medium Frequency Operation","authors":"B. Skala, V. Kindl, L. Poláček, P. Turjanica, Ales Vobornik, J. Valenta, Vojtech Bachura","doi":"10.1109/ELEKTRO49696.2020.9130332","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130332","url":null,"abstract":"The paper proposes design procedure of several types of current sensors. The winding design is analyzed regarding its impact on operational characteristics and evaluated for preferred application. The paper also discusses the measurement results and given frequency characteristic and quality factors of the laboratory prototypes.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121607890","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}
Pub Date : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130257
V. V. Gudzev, V. Litvinov, V. G. Mishustin, A. D. Maslov, M. Zubkov
In this paper we present description of the developed current DLTS spectrometer to investigate deep energy levels in barrier structures based on crystalline and non-crystalline semiconductors with large rectifying junction area and high leakage currents. This modified equipment allows to define DL parameters such as ionization energy, cross section and concentration in the wide temperature range 7…500К, relaxation time range 10 μs…10 s, maximum barrier capacitance till 2000 pF, relaxation current amplitude range 10 pА…10 mА.
{"title":"Experimental equipment to investigate deep energy levels in semiconductor barrier structures with high leakage current","authors":"V. V. Gudzev, V. Litvinov, V. G. Mishustin, A. D. Maslov, M. Zubkov","doi":"10.1109/ELEKTRO49696.2020.9130257","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130257","url":null,"abstract":"In this paper we present description of the developed current DLTS spectrometer to investigate deep energy levels in barrier structures based on crystalline and non-crystalline semiconductors with large rectifying junction area and high leakage currents. This modified equipment allows to define DL parameters such as ionization energy, cross section and concentration in the wide temperature range 7…500К, relaxation time range 10 μs…10 s, maximum barrier capacitance till 2000 pF, relaxation current amplitude range 10 pА…10 mА.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"225 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132470717","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}
Pub Date : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130327
B. Dobrucký, J. Šedo, P. Braciník, M. Lusková
The paper is about improving a secure supply of phase-sensitive appliances in the AC network. Mainly, it deals with short-time sags of energy delivering or/and influence of non-linear loads on the power supply network [1]–[4] without a change of a phase position of the supply voltage. Application of combine techniques of dynamical voltage restorer (DVR) and uninterruptible power supply (UPS) makes possible the voltage sags compensation. This needs a fast control method which can provide a voltage recovery for phase-sensitive loads during a few/several calculation steps, so, the dead-beat regulator is used. The simulation results in Matlab/Simulink without and with compensation control are given in the paper.
{"title":"Improving reliability of sensitive appliance supply combining DVR and UPS techniques: A new concept","authors":"B. Dobrucký, J. Šedo, P. Braciník, M. Lusková","doi":"10.1109/ELEKTRO49696.2020.9130327","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130327","url":null,"abstract":"The paper is about improving a secure supply of phase-sensitive appliances in the AC network. Mainly, it deals with short-time sags of energy delivering or/and influence of non-linear loads on the power supply network [1]–[4] without a change of a phase position of the supply voltage. Application of combine techniques of dynamical voltage restorer (DVR) and uninterruptible power supply (UPS) makes possible the voltage sags compensation. This needs a fast control method which can provide a voltage recovery for phase-sensitive loads during a few/several calculation steps, so, the dead-beat regulator is used. The simulation results in Matlab/Simulink without and with compensation control are given in the paper.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132722792","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}
Pub Date : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130364
Koryachko Aleksei Vyacheslavovich, Minaev Vladimir Aleksandrovich, Faddeev Aleksandr Olegovich
System-dynamic model of manipulative influences in social networks is considered. Used differential equation system is given. Experiments with the model using simulation system AnyLogic are carried out. Experimental results based on the research of information distribution in different regions of Russian Federation are shown. Using cluster analysis, the typology of locations into statistically homogeneous groups is made. An accurate model showing the dependency of dynamic characteristics shown by information distribution in social networks of different clusters from the median that characterizes the number of network user "followers" is constructed. The model allows implementing the forecast of information counteractions in social networks and reproducing different scenarios of given processes development.
{"title":"Simulation Modeling of Manipulative Influences in Social Networks","authors":"Koryachko Aleksei Vyacheslavovich, Minaev Vladimir Aleksandrovich, Faddeev Aleksandr Olegovich","doi":"10.1109/ELEKTRO49696.2020.9130364","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130364","url":null,"abstract":"System-dynamic model of manipulative influences in social networks is considered. Used differential equation system is given. Experiments with the model using simulation system AnyLogic are carried out. Experimental results based on the research of information distribution in different regions of Russian Federation are shown. Using cluster analysis, the typology of locations into statistically homogeneous groups is made. An accurate model showing the dependency of dynamic characteristics shown by information distribution in social networks of different clusters from the median that characterizes the number of network user \"followers\" is constructed. The model allows implementing the forecast of information counteractions in social networks and reproducing different scenarios of given processes development.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131696069","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}
Pub Date : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130271
Jaroslav Ilončiak, Marek Kováč, G. Kácsor, Z. Biel, M. Franko, J. Buday
This paper describes a regulation structure for the BUCK converter without galvanic isolation. The feedforward control structure with an adaptive feedback loop improves the dynamic properties of the entire inverter. It also ensures higher resistance of the regulation structure against changes of the input variable. The control structure has been designed for traction converters that are supplied with voltage from the traction dc bus which is characterized by significant rises and falls. It may occur especially during transient events, for instance, locomotive’s drift in pull or when the locomotive changes its mode from a drive to a brake mode and vice-versa.However, this theory and principles of the regulation structure can be used also in other types of DC/DC converters. What is more, it is possible to use it also for DC/DC converters with galvanic isolation after adaptation for the particular application.
{"title":"Feedforward control structure with adaptive feedback loop of step down converter","authors":"Jaroslav Ilončiak, Marek Kováč, G. Kácsor, Z. Biel, M. Franko, J. Buday","doi":"10.1109/ELEKTRO49696.2020.9130271","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130271","url":null,"abstract":"This paper describes a regulation structure for the BUCK converter without galvanic isolation. The feedforward control structure with an adaptive feedback loop improves the dynamic properties of the entire inverter. It also ensures higher resistance of the regulation structure against changes of the input variable. The control structure has been designed for traction converters that are supplied with voltage from the traction dc bus which is characterized by significant rises and falls. It may occur especially during transient events, for instance, locomotive’s drift in pull or when the locomotive changes its mode from a drive to a brake mode and vice-versa.However, this theory and principles of the regulation structure can be used also in other types of DC/DC converters. What is more, it is possible to use it also for DC/DC converters with galvanic isolation after adaptation for the particular application.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115682490","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}
Pub Date : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130265
Domenico Nardo, Alfio Scuto, M. Cacciato
Addressing modern SMPS applications, the impact of gate-source threshold voltage (VGSth) in super junction MOSFET is investigated, using a DCM PFC and a half bridge LLC as test vehicles. Specifically, a higher VGSth, while effecting the performance, introduces benefits and disadvantages as well.
{"title":"Analysis of the impacts of the VGSth in modern SMPS","authors":"Domenico Nardo, Alfio Scuto, M. Cacciato","doi":"10.1109/ELEKTRO49696.2020.9130265","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130265","url":null,"abstract":"Addressing modern SMPS applications, the impact of gate-source threshold voltage (VGSth) in super junction MOSFET is investigated, using a DCM PFC and a half bridge LLC as test vehicles. Specifically, a higher VGSth, while effecting the performance, introduces benefits and disadvantages as well.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114493853","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}
Pub Date : 2020-05-01DOI: 10.1109/ELEKTRO49696.2020.9130361
D. Perepelkin, M. Ivanchikova
Currently, the most popular approach in information technology and computer networks is technology of software defined networks (SDN). Its main feature is separation of data plane and control plane levels, as well as support of specified requirements for the quality of service (QoS) of network applications. The aim of this work is the development of intelligent adaptive routing algorithm in SDN with support QoS. Proposed algorithm based on using a composite LARAC metric in that the bandwidth can be constant and the effect of transmission delay varies depending on the control coefficient. To implement the algorithm comparative analysis and experimental research of different neural network architectures were carried out. Also a model that allows the highest accuracy of optimal routes search in SDN with support multiple QoS parameters was developed.
{"title":"Intelligent Adaptive Routing Algorithm in Software Defined Networks with Quality of Service","authors":"D. Perepelkin, M. Ivanchikova","doi":"10.1109/ELEKTRO49696.2020.9130361","DOIUrl":"https://doi.org/10.1109/ELEKTRO49696.2020.9130361","url":null,"abstract":"Currently, the most popular approach in information technology and computer networks is technology of software defined networks (SDN). Its main feature is separation of data plane and control plane levels, as well as support of specified requirements for the quality of service (QoS) of network applications. The aim of this work is the development of intelligent adaptive routing algorithm in SDN with support QoS. Proposed algorithm based on using a composite LARAC metric in that the bandwidth can be constant and the effect of transmission delay varies depending on the control coefficient. To implement the algorithm comparative analysis and experimental research of different neural network architectures were carried out. Also a model that allows the highest accuracy of optimal routes search in SDN with support multiple QoS parameters was developed.","PeriodicalId":165069,"journal":{"name":"2020 ELEKTRO","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123923657","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}
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