Pub Date : 2021-11-01DOI: 10.1109/comcas52219.2021.9629087
Donevollon Sladden, L. Farrugia, Roberta Scicluna, J. Bonello, C. Sammut
This paper reports on a preliminary characterisation of the complex permittivity of tissues within the oral cavity. In-vivo dielectric measurements were conducted on the lips and on five different areas of the tongue corresponding to different anatomical areas (ventral, dorsal, tip, left and right sides). The study included 25 patients having different ages and for each patient, three independent measurements were repeated for each tissue type. From this study, it has been observed that no statistical difference exists between the different areas of the tongue. However, there exists a statistical difference between the average dielectric properties of the tongue and lips.
{"title":"Preliminary study on in-vivo dielectric properties of tissues in the human oral cavity at microwave frequencies","authors":"Donevollon Sladden, L. Farrugia, Roberta Scicluna, J. Bonello, C. Sammut","doi":"10.1109/comcas52219.2021.9629087","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629087","url":null,"abstract":"This paper reports on a preliminary characterisation of the complex permittivity of tissues within the oral cavity. In-vivo dielectric measurements were conducted on the lips and on five different areas of the tongue corresponding to different anatomical areas (ventral, dorsal, tip, left and right sides). The study included 25 patients having different ages and for each patient, three independent measurements were repeated for each tissue type. From this study, it has been observed that no statistical difference exists between the different areas of the tongue. However, there exists a statistical difference between the average dielectric properties of the tongue and lips.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125545141","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 : 2021-11-01DOI: 10.1109/comcas52219.2021.9629080
J. Fordham, L. Foged, V. Rodriguez, J. Dobbins, V. Monebhurrun
IEEE Standard 149, Standard Test Procedures for Antennas, was last revised in 1979 [1]. Over the years, the standard was reaffirmed without any change and its validity for antenna measurements was re-established without a proper revision to account for state-of-the-art facilities and measurement practices. To initiate the revision of this standard, a project authorization request (PAR) was approved by the IEEE Standards Association and a working group (WG) was formed. After several years revising and updating different clauses, the revision tasking is nearing completion. In this paper, we describe and comment on the changes to the document.
{"title":"Revision of the Antenna Measurement Standard IEEE Std 149","authors":"J. Fordham, L. Foged, V. Rodriguez, J. Dobbins, V. Monebhurrun","doi":"10.1109/comcas52219.2021.9629080","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629080","url":null,"abstract":"IEEE Standard 149, Standard Test Procedures for Antennas, was last revised in 1979 [1]. Over the years, the standard was reaffirmed without any change and its validity for antenna measurements was re-established without a proper revision to account for state-of-the-art facilities and measurement practices. To initiate the revision of this standard, a project authorization request (PAR) was approved by the IEEE Standards Association and a working group (WG) was formed. After several years revising and updating different clauses, the revision tasking is nearing completion. In this paper, we describe and comment on the changes to the document.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126260426","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 : 2021-11-01DOI: 10.1109/comcas52219.2021.9629020
Aviel Glam, Barak Farbman, I. Ashkenazi
The term Internet of Things (IoT) refers today to the rapidly growing number of energy-limited wireless end-node sensor devices that interconnect over the internet and are remotely monitored and controlled. IoT is the main enabler for smart cities and as a consequence, it impacts various smart city applications like air pollution monitoring, traffic and parking control, waste management, and more. In most cases, the sensors are spread over the city and are wirelessly connected to one or more gateways. The gateway receives the collected sensor’s data and transfers it up to a server located at the backbone. Achieving optimal connectivity and availability between the end-node devices and the backbone is challenging and requires deploying multiple device-to-gateway configuration schemes. This paper describes and explores several such schemes that incorporate most communication needs in smart cities.
{"title":"Complete IoT Solution for Smart Cities Using LoRaWAN Technology","authors":"Aviel Glam, Barak Farbman, I. Ashkenazi","doi":"10.1109/comcas52219.2021.9629020","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629020","url":null,"abstract":"The term Internet of Things (IoT) refers today to the rapidly growing number of energy-limited wireless end-node sensor devices that interconnect over the internet and are remotely monitored and controlled. IoT is the main enabler for smart cities and as a consequence, it impacts various smart city applications like air pollution monitoring, traffic and parking control, waste management, and more. In most cases, the sensors are spread over the city and are wirelessly connected to one or more gateways. The gateway receives the collected sensor’s data and transfers it up to a server located at the backbone. Achieving optimal connectivity and availability between the end-node devices and the backbone is challenging and requires deploying multiple device-to-gateway configuration schemes. This paper describes and explores several such schemes that incorporate most communication needs in smart cities.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127930253","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 : 2021-11-01DOI: 10.1109/comcas52219.2021.9629103
J. L. Carvalho, L. Kretly
This work presents a derivation of the Newton-Raphson method, treated here as the Quasi-Newtonian (QN) algorithm. The QN has the same proprieties as the traditional Newton-Raphson method for extreme seeking, but due to a different manipulation of the Taylor series expansion, the method becomes a second-order method instead of a first-order method. Hence acquiring a fast convergence. That characteristic is explored in the performance of the Perturb and Observe algorithm for maximum power point tracking of photovoltaic systems. At this work, the QN is used not only to analyze the slope of the PxV curve of the photovoltaic system in order to choose the perturbation direction inserted by the Perturb and Observe algorithm (P&O) but to calculate the value of the perturbation as well. The simulation results have shown a fast-tracking of the maximum power point (MPP) and a small steady-state error when compared to the classical P&O algorithm.
{"title":"Modified Newton-Raphson Method to Achieve Variable Step Hill-Climbing Algorithm for Maximum Power Point Tracking","authors":"J. L. Carvalho, L. Kretly","doi":"10.1109/comcas52219.2021.9629103","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629103","url":null,"abstract":"This work presents a derivation of the Newton-Raphson method, treated here as the Quasi-Newtonian (QN) algorithm. The QN has the same proprieties as the traditional Newton-Raphson method for extreme seeking, but due to a different manipulation of the Taylor series expansion, the method becomes a second-order method instead of a first-order method. Hence acquiring a fast convergence. That characteristic is explored in the performance of the Perturb and Observe algorithm for maximum power point tracking of photovoltaic systems. At this work, the QN is used not only to analyze the slope of the PxV curve of the photovoltaic system in order to choose the perturbation direction inserted by the Perturb and Observe algorithm (P&O) but to calculate the value of the perturbation as well. The simulation results have shown a fast-tracking of the maximum power point (MPP) and a small steady-state error when compared to the classical P&O algorithm.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"316 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124290321","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 : 2021-11-01DOI: 10.1109/comcas52219.2021.9629086
Matan Shapira, A. Boag, A. Natan
We demonstrate a parallel and efficient mutli-domain scheme for Density Functional Theory (DFT) calculations of large molecular systems. The system is divided into sub-domains and the electrostatic potential produced by the charge density of each subdomain is calculated in a parallel manner. We show that our scheme leads to a linear scaling (instead of cubic) for the calculation time while keeping the same accuracy. This is demonstrated for a couple of systems with two molecules.
{"title":"Efficient Multi-Domain Schemes for Large Quantum Systems’ Calculations","authors":"Matan Shapira, A. Boag, A. Natan","doi":"10.1109/comcas52219.2021.9629086","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629086","url":null,"abstract":"We demonstrate a parallel and efficient mutli-domain scheme for Density Functional Theory (DFT) calculations of large molecular systems. The system is divided into sub-domains and the electrostatic potential produced by the charge density of each subdomain is calculated in a parallel manner. We show that our scheme leads to a linear scaling (instead of cubic) for the calculation time while keeping the same accuracy. This is demonstrated for a couple of systems with two molecules.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114985144","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 : 2021-11-01DOI: 10.1109/comcas52219.2021.9629074
Cedric Münger, K. Cools
We present a method for the numerical evaluation of 6D singular integrals appearing in Volume Integral Equations. It is an extension of the Sauter-Schwab/Taylor-Duffy strategy for singular triangle-triangle interaction integrals to singular tetrahedron-tetrahedron interaction integrals. This general approach allows to use different kinds of kernel and basis functions. It also works on curvilinear domains. Our approach is based on relative coordinates and splitting the integration domain into subdomains for which quadrature rules can be constructed. Further, we show how to build these tensor-product quadrature rules economically using quadrature rules defined over 2D, 3D and 4D simplices. Compared to the existing approach where the integral is computed as a sequence of 1D integrations significant speedup can be achieved. The accuracy and convergence properties of the method are demonstrated by numerical experiments.
{"title":"Efficient and kernel-independent Evaluation of Singular Integrals in Volume Integral Equations","authors":"Cedric Münger, K. Cools","doi":"10.1109/comcas52219.2021.9629074","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629074","url":null,"abstract":"We present a method for the numerical evaluation of 6D singular integrals appearing in Volume Integral Equations. It is an extension of the Sauter-Schwab/Taylor-Duffy strategy for singular triangle-triangle interaction integrals to singular tetrahedron-tetrahedron interaction integrals. This general approach allows to use different kinds of kernel and basis functions. It also works on curvilinear domains. Our approach is based on relative coordinates and splitting the integration domain into subdomains for which quadrature rules can be constructed. Further, we show how to build these tensor-product quadrature rules economically using quadrature rules defined over 2D, 3D and 4D simplices. Compared to the existing approach where the integral is computed as a sequence of 1D integrations significant speedup can be achieved. The accuracy and convergence properties of the method are demonstrated by numerical experiments.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123603070","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 : 2021-11-01DOI: 10.1109/comcas52219.2021.9629067
M. Peleg, T. Michaeli, S. Shamai
We consider the capacity of a band-limited additive white Gaussian noise channel, with bipolar inputs, a framework motivated by power-efficient faster than Nyquist signaling. We improve the available Ozarow-Wyner-Ziv (OWZ) lower bound on capacity by introducing a new communication scheme, exhibiting two advantages over the OWZ approach based on peak-power constrained pulse-amplitude modulation. We demonstrate analytically, a moderately improved information rate of the suggested technique, exhibiting also considerably less sign transitions of the bipolar signal. The gap between the known upper-bound based on spectral constrains of bipolar signals and the new achievable lower bound is reduced to 1.1 bits per Nyquist interval at the high signal-to-noise ratio regime.
{"title":"On Information Rates over a Binary-Input Filtered Gaussian Channel","authors":"M. Peleg, T. Michaeli, S. Shamai","doi":"10.1109/comcas52219.2021.9629067","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629067","url":null,"abstract":"We consider the capacity of a band-limited additive white Gaussian noise channel, with bipolar inputs, a framework motivated by power-efficient faster than Nyquist signaling. We improve the available Ozarow-Wyner-Ziv (OWZ) lower bound on capacity by introducing a new communication scheme, exhibiting two advantages over the OWZ approach based on peak-power constrained pulse-amplitude modulation. We demonstrate analytically, a moderately improved information rate of the suggested technique, exhibiting also considerably less sign transitions of the bipolar signal. The gap between the known upper-bound based on spectral constrains of bipolar signals and the new achievable lower bound is reduced to 1.1 bits per Nyquist interval at the high signal-to-noise ratio regime.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128507085","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 : 2021-11-01DOI: 10.1109/comcas52219.2021.9629016
D. Rotshild, A. Abramovich
A metasurface reflector that supports two-dimensional beam steering is essential for switching between users and bypassing obstacles to create a quasi-line-of-sight in fifth-generation wireless communication. Polarization considerations become very important when two-dimensional beam steering is desired. In practical beam-steering uses, the assumption that the users' polarization and the metasurface reflector polarization are the same is invalid. The beam steering performances of the metasurface reflector were analyzed as a function of the polarization angle between the users and the metasurface. This work shows that up to medium values in the polarization angle differences between the users and the intended metasurface reflector polarization, the beam steering performance is maintained in terms of gain, losses, and sidelobe level.
{"title":"Polarization consideration of 2-D beam-steering metasurface reflector at Ka-band for wireless communication","authors":"D. Rotshild, A. Abramovich","doi":"10.1109/comcas52219.2021.9629016","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629016","url":null,"abstract":"A metasurface reflector that supports two-dimensional beam steering is essential for switching between users and bypassing obstacles to create a quasi-line-of-sight in fifth-generation wireless communication. Polarization considerations become very important when two-dimensional beam steering is desired. In practical beam-steering uses, the assumption that the users' polarization and the metasurface reflector polarization are the same is invalid. The beam steering performances of the metasurface reflector were analyzed as a function of the polarization angle between the users and the metasurface. This work shows that up to medium values in the polarization angle differences between the users and the intended metasurface reflector polarization, the beam steering performance is maintained in terms of gain, losses, and sidelobe level.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129580695","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 : 2021-11-01DOI: 10.1109/comcas52219.2021.9629082
Ida Maiorov, A. Livneh, Roy Efraim, A. Landesberg
Evaluation of myocardial function is critical in severe inflammations as myocarditis, COVID-19 and sepsis, since it can lead to organ failure and death. Point-of-care detection of myocardial injury may improve the treatment of these critically ill patients. The study aimed to develop point of care technology for assessing the systolic and diastolic cardiac functions in animal model of systemic inflammation. Ultrasound and ventricular pressure were continuously recorded in Langendorff perfused isolated adult rat hearts. A computer controlled system controlled the ventricle loading conditions. The preload of both ventricles swung in a sinusoidal manner between target values of 2 and 22 mmHg. Collagenase (MMP8) was added to the Krebs-Henseleit solution following baseline recordings, to emulate the release of MMPs from activated leukocytes and macrophages. Collagenase perfusion led to gradual decline in peak systolic pressure and decrease in the end-diastolic volume (EDV), that were associated with concentric myocardial wall thickening. Extracellular matrix degradation by collagenases caused sever diastolic dysfunction with overt shift of the end-diastolic volume toward lower volumes, without significant changes in the epicardial diameter. Early detection of these signs may assist in assessing the severity of the myocardial injury and prompt the adequate treatment.
{"title":"Point-of-care detection of myocardial injury, a pre-clinical study","authors":"Ida Maiorov, A. Livneh, Roy Efraim, A. Landesberg","doi":"10.1109/comcas52219.2021.9629082","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629082","url":null,"abstract":"Evaluation of myocardial function is critical in severe inflammations as myocarditis, COVID-19 and sepsis, since it can lead to organ failure and death. Point-of-care detection of myocardial injury may improve the treatment of these critically ill patients. The study aimed to develop point of care technology for assessing the systolic and diastolic cardiac functions in animal model of systemic inflammation. Ultrasound and ventricular pressure were continuously recorded in Langendorff perfused isolated adult rat hearts. A computer controlled system controlled the ventricle loading conditions. The preload of both ventricles swung in a sinusoidal manner between target values of 2 and 22 mmHg. Collagenase (MMP8) was added to the Krebs-Henseleit solution following baseline recordings, to emulate the release of MMPs from activated leukocytes and macrophages. Collagenase perfusion led to gradual decline in peak systolic pressure and decrease in the end-diastolic volume (EDV), that were associated with concentric myocardial wall thickening. Extracellular matrix degradation by collagenases caused sever diastolic dysfunction with overt shift of the end-diastolic volume toward lower volumes, without significant changes in the epicardial diameter. Early detection of these signs may assist in assessing the severity of the myocardial injury and prompt the adequate treatment.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127273136","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 : 2021-11-01DOI: 10.1109/comcas52219.2021.9629101
O. Tutian, V. Vulfin, R. Shavit
In this paper, a design of a miniaturized microstrip quadrature 90° hybrid coupler using printed transmission lines and printed capacitors is presented. In order to perform the miniaturization process, the conventional quadrature 90° hybrid coupler planar arms are replaced with equivalent shorter ones which include printed capacitors in each junction of the component. The proposed coupler structure is designed to operate in the 24 GHz - 24.25 GHz band which is used for communication and radar systems. In this design, the main challenge in miniaturization was due to the coupling between the adjacent microstrip lines of the component. The proposed device area is 41% smaller compared to the conventional quadrature 90° hybrid coupler. The simulations were done using Ansys HFSS and Ansys Circuit software.
{"title":"The Quadrature 90° Hybrid Miniaturization at 24 GHz Band","authors":"O. Tutian, V. Vulfin, R. Shavit","doi":"10.1109/comcas52219.2021.9629101","DOIUrl":"https://doi.org/10.1109/comcas52219.2021.9629101","url":null,"abstract":"In this paper, a design of a miniaturized microstrip quadrature 90° hybrid coupler using printed transmission lines and printed capacitors is presented. In order to perform the miniaturization process, the conventional quadrature 90° hybrid coupler planar arms are replaced with equivalent shorter ones which include printed capacitors in each junction of the component. The proposed coupler structure is designed to operate in the 24 GHz - 24.25 GHz band which is used for communication and radar systems. In this design, the main challenge in miniaturization was due to the coupling between the adjacent microstrip lines of the component. The proposed device area is 41% smaller compared to the conventional quadrature 90° hybrid coupler. The simulations were done using Ansys HFSS and Ansys Circuit software.","PeriodicalId":354885,"journal":{"name":"2021 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127411577","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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