Pub Date : 2018-09-01DOI: 10.1109/DIPED.2018.8543288
T. Kaladze, L. Tsamalashvili, D. Kaladze
Properties and peculiarities of linear 3D-propagation of electromagnetic internal gravity waves in an ideally conducting incompressible medium embedded in uniform magnetic field are studied. Local and non-local (plane waves) approaches are applied. It is shown that ordinary internal gravity waves couple with Alfven waves. Associated partial differential equations and dispersion relations are obtained. New branches of oscillations are revealed. Obtained results are applicable to the Earth’s ionosphere and solar atmosphere.
{"title":"Electromagnetic Internal Gravity Waves in an Ideally Conducting Medium","authors":"T. Kaladze, L. Tsamalashvili, D. Kaladze","doi":"10.1109/DIPED.2018.8543288","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543288","url":null,"abstract":"Properties and peculiarities of linear 3D-propagation of electromagnetic internal gravity waves in an ideally conducting incompressible medium embedded in uniform magnetic field are studied. Local and non-local (plane waves) approaches are applied. It is shown that ordinary internal gravity waves couple with Alfven waves. Associated partial differential equations and dispersion relations are obtained. New branches of oscillations are revealed. Obtained results are applicable to the Earth’s ionosphere and solar atmosphere.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114960504","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 : 2018-09-01DOI: 10.1109/diped.2018.8543264
{"title":"[Title page]","authors":"","doi":"10.1109/diped.2018.8543264","DOIUrl":"https://doi.org/10.1109/diped.2018.8543264","url":null,"abstract":"","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115247119","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 : 2018-09-01DOI: 10.1109/DIPED.2018.8543133
Deniz Ustun, E. Yiğit, A. Toktas, K. Sabanci, Huseyin Duysak
In this study a synthetic aperture radar-based reconstruction technique is applied to focus the unwanted disruptive effects in the two-dimensional ground penetrating radar data. The formulation of the applied Matched Filter Algorithm (MFA) which completely removes the hyperbolic effects is presented in detail. To test the capability of the proposed technique an experimental measurement setup is constructed in the laboratory and MFA is operated to gathered real GPR data. Thanks to the applied technique, high-resolution focused B-Scan GPR images are successfully obtained.
{"title":"GPR Image Focusing Using Matched Filter Algorithm","authors":"Deniz Ustun, E. Yiğit, A. Toktas, K. Sabanci, Huseyin Duysak","doi":"10.1109/DIPED.2018.8543133","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543133","url":null,"abstract":"In this study a synthetic aperture radar-based reconstruction technique is applied to focus the unwanted disruptive effects in the two-dimensional ground penetrating radar data. The formulation of the applied Matched Filter Algorithm (MFA) which completely removes the hyperbolic effects is presented in detail. To test the capability of the proposed technique an experimental measurement setup is constructed in the laboratory and MFA is operated to gathered real GPR data. Thanks to the applied technique, high-resolution focused B-Scan GPR images are successfully obtained.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132115588","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 : 2018-09-01DOI: 10.1109/DIPED.2018.8543290
D. Gretskih, A. Luchaninov, J. V. Vishniakova, V. Katrich, M. Nesterenko
A nonlinear mathematical model of wireless power transmission (WPT) systems of various classes and purposes is developed. The WPT system is considered as antenna with nonlinear elements (ANE). Models of the WPT systems and analysis of nonlinear effects in the systems are based on the mathematical apparatus of the ANE.
{"title":"Electrodynamic Model of a Wireless Power Transmission System","authors":"D. Gretskih, A. Luchaninov, J. V. Vishniakova, V. Katrich, M. Nesterenko","doi":"10.1109/DIPED.2018.8543290","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543290","url":null,"abstract":"A nonlinear mathematical model of wireless power transmission (WPT) systems of various classes and purposes is developed. The WPT system is considered as antenna with nonlinear elements (ANE). Models of the WPT systems and analysis of nonlinear effects in the systems are based on the mathematical apparatus of the ANE.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131707330","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 : 2018-09-01DOI: 10.1109/DIPED.2018.8543310
Tamar Nozadze, V. Jeladze, V. Tabatadze, I. Petoev, R. Zaridze
Mobile phones’ radiation influence on a homogenous human model located inside a car is studied in this research. One of the novelty of proposed research is earth surface influence consideration under the car on EM field formation inside it. The inner field and its amplification by the car’s walls that in some cases act like a resonator are studied. The problem was solved numerically using the Method of Auxiliary Sources. Numerical simulations were carried out at the 450, 900, 1800 [MHz] standard communication frequencies. Obtained results showed the presence of resonant phenomena inside the car.
{"title":"Mobile Phone Antenna’s EM Exposure Study on a Homogeneous Human Model Inside the Car","authors":"Tamar Nozadze, V. Jeladze, V. Tabatadze, I. Petoev, R. Zaridze","doi":"10.1109/DIPED.2018.8543310","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543310","url":null,"abstract":"Mobile phones’ radiation influence on a homogenous human model located inside a car is studied in this research. One of the novelty of proposed research is earth surface influence consideration under the car on EM field formation inside it. The inner field and its amplification by the car’s walls that in some cases act like a resonator are studied. The problem was solved numerically using the Method of Auxiliary Sources. Numerical simulations were carried out at the 450, 900, 1800 [MHz] standard communication frequencies. Obtained results showed the presence of resonant phenomena inside the car.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123576272","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 : 2018-09-01DOI: 10.1109/DIPED.2018.8543258
N. Yeliseyeva, V. Katrich, M. Nesterenko, S. Berdnik
The resonant values of impedance, uniformly distributed along a surface of a dipole, located in the bisector plane of a dihedral corner reflector with perfectly conducting faces of infinite sizes are calculated versus a dipole to corner distance S at different aperture corner angles. There are used the mirror image method and asymptotic expression for a current in a horizontal impedance dipole placed above an infinite ideally conducting plane. The field intensity and directive gains in the normal direction to a corner aperture and radiation resistances of the dipoles with different lengths were calculated depending on a spacing S, type and magnitude of dipole surface impedance. The characteristics of the resonant dipoles placed inside a corner reflector with different aperture angles are analyzed in detail.
{"title":"Characteristics of Resonant Impedance Dipole Placed Inside Dihedral Corner Reflector","authors":"N. Yeliseyeva, V. Katrich, M. Nesterenko, S. Berdnik","doi":"10.1109/DIPED.2018.8543258","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543258","url":null,"abstract":"The resonant values of impedance, uniformly distributed along a surface of a dipole, located in the bisector plane of a dihedral corner reflector with perfectly conducting faces of infinite sizes are calculated versus a dipole to corner distance S at different aperture corner angles. There are used the mirror image method and asymptotic expression for a current in a horizontal impedance dipole placed above an infinite ideally conducting plane. The field intensity and directive gains in the normal direction to a corner aperture and radiation resistances of the dipoles with different lengths were calculated depending on a spacing S, type and magnitude of dipole surface impedance. The characteristics of the resonant dipoles placed inside a corner reflector with different aperture angles are analyzed in detail.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125112611","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 : 2018-09-01DOI: 10.1109/DIPED.2018.8543127
V. Borulko, G. P. Zouros
In this work we propose a modified Prony interpolation (MPI) technique for the integration of highly oscillating functions appearing in various engineering problems, like electrically large scattering or physical optics problems. We develop a quadrature for the numerical integration over a finite domain [a, b]. In domain [a, b], the integrand function is appropriately interpolated using Prony’s method, taking into account the optimal estimation of the complex exponents existing in the interpolation formula. This optimal selection is chosen by examining the principal value of the involved logarithm, and allows for improved convergence. The convergence and accuracy of the MPI method is demonstrated by comparisons with the alternative Gauss-Kronrod quadrature, which is suitable for integrating highly oscillating functions. Different numerical results are presented. Represented numerical results.
{"title":"Modified Prony Method for Integration of Highly Oscillating Functions","authors":"V. Borulko, G. P. Zouros","doi":"10.1109/DIPED.2018.8543127","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543127","url":null,"abstract":"In this work we propose a modified Prony interpolation (MPI) technique for the integration of highly oscillating functions appearing in various engineering problems, like electrically large scattering or physical optics problems. We develop a quadrature for the numerical integration over a finite domain [a, b]. In domain [a, b], the integrand function is appropriately interpolated using Prony’s method, taking into account the optimal estimation of the complex exponents existing in the interpolation formula. This optimal selection is chosen by examining the principal value of the involved logarithm, and allows for improved convergence. The convergence and accuracy of the MPI method is demonstrated by comparisons with the alternative Gauss-Kronrod quadrature, which is suitable for integrating highly oscillating functions. Different numerical results are presented. Represented numerical results.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122496245","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 : 2018-09-01DOI: 10.1109/diped.2018.8543327
{"title":"Modeling in Electronics","authors":"","doi":"10.1109/diped.2018.8543327","DOIUrl":"https://doi.org/10.1109/diped.2018.8543327","url":null,"abstract":"","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"358 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122733442","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 : 2018-09-01DOI: 10.1109/DIPED.2018.8543303
A. Lomia, L. Shoshiashvili, D. Kakulia, B. Baratashvili, G. Chaganava, G. Ghvedashvili, F. Shubitidze
Recently, nano-particles (NP) hyperthermia emerged as one of the most promising technologies for the treatment of cancers at the cell level. Studies show that cancer cells accept and accumulate NP more preferable than normal cells [1]. We have shown in [1], that heat production mechanism for Dartmouth mNP cannot be hysteresis. In this paper, we present experimental SAR measurement for Dartmouth mNP and give simulation results taking in account viscous friction loss as the main mechanism of SAR production. We have modeled eddy current heat generation in phantom as well as in the realistic human model. Results show that the eddy current heat effect is the same order as in mNP, which exhibits necessity of mechanism for eddy currents minimization.
{"title":"Heat Production During mNP Hyperthermia - applied on a Deep Seated Tumors","authors":"A. Lomia, L. Shoshiashvili, D. Kakulia, B. Baratashvili, G. Chaganava, G. Ghvedashvili, F. Shubitidze","doi":"10.1109/DIPED.2018.8543303","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543303","url":null,"abstract":"Recently, nano-particles (NP) hyperthermia emerged as one of the most promising technologies for the treatment of cancers at the cell level. Studies show that cancer cells accept and accumulate NP more preferable than normal cells [1]. We have shown in [1], that heat production mechanism for Dartmouth mNP cannot be hysteresis. In this paper, we present experimental SAR measurement for Dartmouth mNP and give simulation results taking in account viscous friction loss as the main mechanism of SAR production. We have modeled eddy current heat generation in phantom as well as in the realistic human model. Results show that the eddy current heat effect is the same order as in mNP, which exhibits necessity of mechanism for eddy currents minimization.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134646318","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 : 2018-09-01DOI: 10.1109/DIPED.2018.8543320
G. Koshovy
Analysis of acoustic wave scattering by a finite flat impedance strip grating is presented. The associated two-dimensional (2-D) boundary-value problem is considered in the full-wave manner and cast to a set of coupled integral equations. Based on them, we build several mathematical models. The focus of research is on the acoustic plane wave scattering by a grating of narrow impedance strips that has explicit asymptotic solution.
{"title":"Mathematical Models of Acoustic Wave Scattering by a Finite Flat Impedance Strip Grating","authors":"G. Koshovy","doi":"10.1109/DIPED.2018.8543320","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543320","url":null,"abstract":"Analysis of acoustic wave scattering by a finite flat impedance strip grating is presented. The associated two-dimensional (2-D) boundary-value problem is considered in the full-wave manner and cast to a set of coupled integral equations. Based on them, we build several mathematical models. The focus of research is on the acoustic plane wave scattering by a grating of narrow impedance strips that has explicit asymptotic solution.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114202832","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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