Pub Date : 2023-09-30DOI: 10.4283/jmag.2023.28.3.309
Hui Min Kim, Yong-Kyu Lee, Meung Geun Song
The solenoid coil is one of the most important design component for electromagnetic induction type coil gun system. When the voltage and current are applied across the coil, a uniform magnetic field is generated inside the coil and that is proportional to the number of coil windings, and the high-density magnetic field generated by the coil can be converted to mechanical energy by applying the strong electromagnetic force to a ferromagnetic material. At this time, the interaction between the current and magnetic field of the solenoid coil generates a strong electromagnetic expansive force between each coil wire. In this paper, we introduced a four-stage induction coil gun as the launcher system using high voltage pulsed power source. Also, we proposed both the method and formula to calculate the electromagnetic expansion force acting on the multi-winding layer solenoid coil gun by using energy transfer equations. When the current flows a solenoid coil, the expansion force is generated in the radial direction of the coil. The mathematical calculation results were verified by simulated ones.
{"title":"Four Stage Induction Coilgun System Design and Analytical Calculation of Electromagnetic Expansion Force on the Stator Coil in the System","authors":"Hui Min Kim, Yong-Kyu Lee, Meung Geun Song","doi":"10.4283/jmag.2023.28.3.309","DOIUrl":"https://doi.org/10.4283/jmag.2023.28.3.309","url":null,"abstract":"The solenoid coil is one of the most important design component for electromagnetic induction type coil gun system. When the voltage and current are applied across the coil, a uniform magnetic field is generated inside the coil and that is proportional to the number of coil windings, and the high-density magnetic field generated by the coil can be converted to mechanical energy by applying the strong electromagnetic force to a ferromagnetic material. At this time, the interaction between the current and magnetic field of the solenoid coil generates a strong electromagnetic expansive force between each coil wire. In this paper, we introduced a four-stage induction coil gun as the launcher system using high voltage pulsed power source. Also, we proposed both the method and formula to calculate the electromagnetic expansion force acting on the multi-winding layer solenoid coil gun by using energy transfer equations. When the current flows a solenoid coil, the expansion force is generated in the radial direction of the coil. The mathematical calculation results were verified by simulated ones.","PeriodicalId":16147,"journal":{"name":"Journal of Magnetics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135040962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Thickness Dependence of Creep-Scaling behavior in Pt/Co Single Interface Films","authors":"Ji-Sung Yu, Seong-Hyub Lee, Minhwan Kim, Jiho Shin, Wooyoung Shim, Sug-Bong Choe","doi":"10.4283/jmag.2023.28.3.227","DOIUrl":"https://doi.org/10.4283/jmag.2023.28.3.227","url":null,"abstract":"","PeriodicalId":16147,"journal":{"name":"Journal of Magnetics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135040978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-30DOI: 10.4283/jmag.2023.28.3.239
Trinh Nguyen Thi, Phuoc Cao Van, Kirakosyan Artavazd, Chanyong Hwang, Jihoon Choi, Hyojin Kim, Jong-Ryul Jeong
ε-FeSUB2/SUBOSUB3/SUB has received attention with particular interest because of its large coercive field at room temperature, high-frequency millimeter-wave absorption, and the coupling of its magnetic and dielectric properties. This work investigated the effect of heat treatment on the formation of ε-FeSUB2/SUBOSUB3/SUB/SiOSUB2/SUB composites fabricated using reverse-micelle and sol-gel methods. The heating process was performed at various temperatures to figure out the optimal conditions for acquisition of the ε-FeSUB2/SUBOSUB3/SUB phase, which exhibits the largest coercive field among the Fe oxides. The sample treated at 1,075 °C had the highest percentage of ε-FeSUB2/SUBOSUB3/SUB phase, with a coercivity (HC) of 21.57 kOe measured at room temperature that reached a maximum of 23.7 kOe at 230 K. The measurement of the magnetization-temperature (M-T) curve for this sample also reveals the characteristic magnetic transition associated with ε-FeSUB2/SUBOSUB3/SUB within the temperature range of 40-150 K. The crystal structure of ε-FeSUB2/SUBOSUB3/SUB was confirmed using X-ray powder diffraction. Transmission electron micrographs revealed a broad size distribution of iron oxide nanoparticles ranging from 12 to 22 nm. The findings indicate that ε-FeSUB2/SUBOSUB3/SUB is a promising candidate with high electromagnetic-wave absorption capacity that is appropriate for high-speed wireless communication applications.
{"title":"Effect of Heat-treatment Temperature on the Formation of ε-Fe<SUB>2</SUB>O<SUB>3</SUB> Nanoparticles Encapsulated by SiO<SUB>2</SUB>","authors":"Trinh Nguyen Thi, Phuoc Cao Van, Kirakosyan Artavazd, Chanyong Hwang, Jihoon Choi, Hyojin Kim, Jong-Ryul Jeong","doi":"10.4283/jmag.2023.28.3.239","DOIUrl":"https://doi.org/10.4283/jmag.2023.28.3.239","url":null,"abstract":"ε-FeSUB2/SUBOSUB3/SUB has received attention with particular interest because of its large coercive field at room temperature, high-frequency millimeter-wave absorption, and the coupling of its magnetic and dielectric properties. This work investigated the effect of heat treatment on the formation of ε-FeSUB2/SUBOSUB3/SUB/SiOSUB2/SUB composites fabricated using reverse-micelle and sol-gel methods. The heating process was performed at various temperatures to figure out the optimal conditions for acquisition of the ε-FeSUB2/SUBOSUB3/SUB phase, which exhibits the largest coercive field among the Fe oxides. The sample treated at 1,075 °C had the highest percentage of ε-FeSUB2/SUBOSUB3/SUB phase, with a coercivity (HC) of 21.57 kOe measured at room temperature that reached a maximum of 23.7 kOe at 230 K. The measurement of the magnetization-temperature (M-T) curve for this sample also reveals the characteristic magnetic transition associated with ε-FeSUB2/SUBOSUB3/SUB within the temperature range of 40-150 K. The crystal structure of ε-FeSUB2/SUBOSUB3/SUB was confirmed using X-ray powder diffraction. Transmission electron micrographs revealed a broad size distribution of iron oxide nanoparticles ranging from 12 to 22 nm. The findings indicate that ε-FeSUB2/SUBOSUB3/SUB is a promising candidate with high electromagnetic-wave absorption capacity that is appropriate for high-speed wireless communication applications.","PeriodicalId":16147,"journal":{"name":"Journal of Magnetics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135041122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-30DOI: 10.4283/jmag.2023.28.3.299
Haixu Qin, Youping Zheng, Liu Yang, Sibo Sun, Zhiyong Gao
Large latent heat is produced in the stress-induced martensitic phase transition process of Ni-Mn-Ca-based materials, i.e., elastocaloric effect. That makes such materials show tremendous potential for solid-state refrigeration which is identified as one of the most promising non-vapor-compression cooling devices. However, the still low refrigeration ability of these materials restricts further commercially promoting of solid-state refrigeration. In this work, we adjusted the Co content to regulate the elastocaloric effect for the NiSUB51.5/SUBMnSUB25/SUBGaSUB23/SUBCoSUB0.5./SUB According to the results, the transformation strain and ratio of loading stress/transformation temperature (dσ/dT) were increased by replacing the Ni atoms with a little more Co, leading to an improvement of the stressinduced transformation entropy-change ΔSσ. As a result, a huge ΔSσ of 45.0 JKgSUP-1/SUPKSUP-1/SUP is achieved in NiSUB50/SUBMnSUB25/SUB-GaSUB23/SUBCoSUB1/SUB alloy.
ni - mn - ca基材料在应力诱导马氏体相变过程中产生较大的潜热，即弹性热效应。这使得这种材料在固态制冷方面显示出巨大的潜力，固态制冷被认为是最有前途的非蒸汽压缩冷却装置之一。然而，这些材料的制冷能力仍然较低，限制了固态制冷的进一步商业化推广。在这项工作中，我们通过调整Co含量来调节NiSUB51.5/SUBMnSUB25/SUBGaSUB23/SUBCoSUB0.5的弹性热效应。结果表明，用少量Co取代Ni原子提高了合金的转变应变和加载应力/转变温度之比(dσ/dT)，从而改善了合金的应力诱导转变熵变ΔSσ。因此，在NiSUB50/SUBMnSUB25/SUB- gasub23 /SUBCoSUB1/SUB合金中实现了45.0 JKgSUP-1/SUPKSUP-1/SUP的巨大ΔSσ。
{"title":"Effect of Co Doping on the Elastocaloric Effect of Ni-Mn-Ga-Co Alloy","authors":"Haixu Qin, Youping Zheng, Liu Yang, Sibo Sun, Zhiyong Gao","doi":"10.4283/jmag.2023.28.3.299","DOIUrl":"https://doi.org/10.4283/jmag.2023.28.3.299","url":null,"abstract":"Large latent heat is produced in the stress-induced martensitic phase transition process of Ni-Mn-Ca-based materials, i.e., elastocaloric effect. That makes such materials show tremendous potential for solid-state refrigeration which is identified as one of the most promising non-vapor-compression cooling devices. However, the still low refrigeration ability of these materials restricts further commercially promoting of solid-state refrigeration. In this work, we adjusted the Co content to regulate the elastocaloric effect for the NiSUB51.5/SUBMnSUB25/SUBGaSUB23/SUBCoSUB0.5./SUB According to the results, the transformation strain and ratio of loading stress/transformation temperature (dσ/dT) were increased by replacing the Ni atoms with a little more Co, leading to an improvement of the stressinduced transformation entropy-change ΔSσ. As a result, a huge ΔSσ of 45.0 JKgSUP-1/SUPKSUP-1/SUP is achieved in NiSUB50/SUBMnSUB25/SUB-GaSUB23/SUBCoSUB1/SUB alloy.","PeriodicalId":16147,"journal":{"name":"Journal of Magnetics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135041130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-30DOI: 10.4283/jmag.2023.28.3.268
Rong Guo, Wei He
This paper presents an improved T-shape linear permanent magnet machine (T-LPMM) based on a traditional surface-mounted linear permanent magnet machine (SM-LPMM). The proposed topological structure aims to protect the surface of the permanent magnet from corrosion and enhance the rigidity against make highfrequency vibration. Firstly, the slotless magnetic field is predicted using finite-element method (FEM) with automatic scripting in MATLAB to consider the inset T-shape structure of PM. Then, the Schwarz-Christoffel (SC) mapping is adopted to calculate the slot effect. Afterward, a subdomain (SD) model is established to analyze the armature reaction, and Taguchi method is employed for optimization purposes. The optimized result is verified by FEM, and a comparison experiment is conducted between T-LPMM and SM-LPMM. The experimental demonstrate superior electromagnetic output performance of the proposed T-LPMM.
{"title":"Design and Optimization of an Improved T-shape Linear Permanent Magnet Machines","authors":"Rong Guo, Wei He","doi":"10.4283/jmag.2023.28.3.268","DOIUrl":"https://doi.org/10.4283/jmag.2023.28.3.268","url":null,"abstract":"This paper presents an improved T-shape linear permanent magnet machine (T-LPMM) based on a traditional surface-mounted linear permanent magnet machine (SM-LPMM). The proposed topological structure aims to protect the surface of the permanent magnet from corrosion and enhance the rigidity against make highfrequency vibration. Firstly, the slotless magnetic field is predicted using finite-element method (FEM) with automatic scripting in MATLAB to consider the inset T-shape structure of PM. Then, the Schwarz-Christoffel (SC) mapping is adopted to calculate the slot effect. Afterward, a subdomain (SD) model is established to analyze the armature reaction, and Taguchi method is employed for optimization purposes. The optimized result is verified by FEM, and a comparison experiment is conducted between T-LPMM and SM-LPMM. The experimental demonstrate superior electromagnetic output performance of the proposed T-LPMM.","PeriodicalId":16147,"journal":{"name":"Journal of Magnetics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135041251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-30DOI: 10.4283/jmag.2023.28.3.230
Chang-Uk Jung
We investigated the magnetic properties of SrRuOSUB3/SUB epitaxial thin film synthesized by using pulsed laser deposition on KTaOSUB3/SUB (001) substrate. X-ray reciprocal space mapping scans showed clear peaks demonstrating high quality, tensile strain with increased unitcell volume, and relaxed growth behavior. Magnetization data shows that the magnetization of the SrRuOSUB3/SUB film with magnetic field along the in-plane direction was larger than one with magnetic field along surface-normal direction.
{"title":"Magnetic Properties of SrRuO<SUB>3</SUB> Epitaxial Thin Film Grown on KTaO<SUB>3</SUB> (001) Substrate","authors":"Chang-Uk Jung","doi":"10.4283/jmag.2023.28.3.230","DOIUrl":"https://doi.org/10.4283/jmag.2023.28.3.230","url":null,"abstract":"We investigated the magnetic properties of SrRuOSUB3/SUB epitaxial thin film synthesized by using pulsed laser deposition on KTaOSUB3/SUB (001) substrate. X-ray reciprocal space mapping scans showed clear peaks demonstrating high quality, tensile strain with increased unitcell volume, and relaxed growth behavior. Magnetization data shows that the magnetization of the SrRuOSUB3/SUB film with magnetic field along the in-plane direction was larger than one with magnetic field along surface-normal direction.","PeriodicalId":16147,"journal":{"name":"Journal of Magnetics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135041249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.4283/jmag.2023.28.2.91
P. Kumar, Ch.R. Phani Kumar
{"title":"Design Analysis of Amended PIFA with Ferrite Sheet Attachment for SAR Reduction in Human Head","authors":"P. Kumar, Ch.R. Phani Kumar","doi":"10.4283/jmag.2023.28.2.91","DOIUrl":"https://doi.org/10.4283/jmag.2023.28.2.91","url":null,"abstract":"","PeriodicalId":16147,"journal":{"name":"Journal of Magnetics","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85668406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.4283/jmag.2023.28.2.194
D. Kweon
This study provides data for the development of oral contrast media for abdominal magnetic resonance imaging (MRI) examinations for potential use in clinical practice. The signal intensities, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) were quantified using various contrast media with longitudinal (T1) and transverse relaxation (T2) pulse sequences. Prediction accuracy error comparisons were conducted according to the mean-squared, mean-absolute, and root-mean-squared errors of the contrast media intensities using the Orange data mining software. The signal strength and SNR were higher in canola oil and pineapple juice (T1-weighted images), while the intensities of blueberry juice and apple juice were high in the T2-weighted images; SNR was high in blueberry and cranberry juice, and CNR was high in Solotop ® and blueberry syrup. The accuracy of the deep-learning prediction errors of MR signal intensities was high. In conclusion, data from ex vivo MRI research can be used for the development of oral contrast media.
{"title":"Quantitative Experimental Phantom Study Based on Abdominal MR Contrast Media Using Deep Learning","authors":"D. Kweon","doi":"10.4283/jmag.2023.28.2.194","DOIUrl":"https://doi.org/10.4283/jmag.2023.28.2.194","url":null,"abstract":"This study provides data for the development of oral contrast media for abdominal magnetic resonance imaging (MRI) examinations for potential use in clinical practice. The signal intensities, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) were quantified using various contrast media with longitudinal (T1) and transverse relaxation (T2) pulse sequences. Prediction accuracy error comparisons were conducted according to the mean-squared, mean-absolute, and root-mean-squared errors of the contrast media intensities using the Orange data mining software. The signal strength and SNR were higher in canola oil and pineapple juice (T1-weighted images), while the intensities of blueberry juice and apple juice were high in the T2-weighted images; SNR was high in blueberry and cranberry juice, and CNR was high in Solotop ® and blueberry syrup. The accuracy of the deep-learning prediction errors of MR signal intensities was high. In conclusion, data from ex vivo MRI research can be used for the development of oral contrast media.","PeriodicalId":16147,"journal":{"name":"Journal of Magnetics","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89723384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-30DOI: 10.4283/jmag.2023.28.2.162
Fuxiang Hao, A. Mu
{"title":"Numerical Analysis and Experimental Study of Symmetric Stepped Magnetic Fluid Seal with Three Magnetic Sources","authors":"Fuxiang Hao, A. Mu","doi":"10.4283/jmag.2023.28.2.162","DOIUrl":"https://doi.org/10.4283/jmag.2023.28.2.162","url":null,"abstract":"","PeriodicalId":16147,"journal":{"name":"Journal of Magnetics","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85490810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Currently, most of the inspection robots for high-voltage transmission lines, both at home and abroad, utilize a multi-cantilever rigid structure. However, the inefficiency and poor safety of these robots when it comes to crossing obstacles make them impractical. To address this issue, a magnetically actuated soft inspection robot has been developed. This robot uses the amperage force applied to the current-carrying coil in a HVDC toroidal magnetic field to efficiently and flexibly cross multiple obstacles in an inchworm-like motion. The focus of this paper is on the design and theoretical calculation of the magnetically actuated model, specifically the magnetic linear traction force and magnetic adsorption force (diastolic force), required to enable the soft robot to crawl. Through simulation and kinematic analysis, the results show that the magnetically actuated soft robot design proposed in this paper is theoretically feasible, providing a foundation for future developments in magnetically actuated soft robots.
{"title":"Research on Magnetic Actuation Mechanism and Kinematics of Soft Inspection Robot for HVDC Transmission Line","authors":"Xianjin Xu, Yanhao Huang, Lanlan Liu, Yu Yan, Haifeng Yan, Yuhang Yang","doi":"10.4283/jmag.2023.28.2.108","DOIUrl":"https://doi.org/10.4283/jmag.2023.28.2.108","url":null,"abstract":"Currently, most of the inspection robots for high-voltage transmission lines, both at home and abroad, utilize a multi-cantilever rigid structure. However, the inefficiency and poor safety of these robots when it comes to crossing obstacles make them impractical. To address this issue, a magnetically actuated soft inspection robot has been developed. This robot uses the amperage force applied to the current-carrying coil in a HVDC toroidal magnetic field to efficiently and flexibly cross multiple obstacles in an inchworm-like motion. The focus of this paper is on the design and theoretical calculation of the magnetically actuated model, specifically the magnetic linear traction force and magnetic adsorption force (diastolic force), required to enable the soft robot to crawl. Through simulation and kinematic analysis, the results show that the magnetically actuated soft robot design proposed in this paper is theoretically feasible, providing a foundation for future developments in magnetically actuated soft robots.","PeriodicalId":16147,"journal":{"name":"Journal of Magnetics","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88273156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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