Pub Date : 2016-05-17DOI: 10.1109/APEMC.2016.7522799
Yuan Dingwang, Peiguo Liu, Yanfei Dong
The design of miniaturized metamaterial absorber is based on the modified Minkowski(M-Minkowski) fractal structure. The proposed absorber is composed of M- Minkowski fractal structure in the top layer etched on dielectric substrate with the lower metal plate. The simulated results indicate that the metamaterial absorber has dual-band absorbing peaks with high absorptivity (>99%). The absorber is insensitive to polarization and has a wide angles(upto 60o) characteristic of incident waves for both TE and TM mode. The proposed absorber can reduce the absorption response bands and further implement miniaturization comparing with the Minkowski fractal structure.
{"title":"A novel miniaturized metamaterial absorber based on the modified Minkowski fractal structure","authors":"Yuan Dingwang, Peiguo Liu, Yanfei Dong","doi":"10.1109/APEMC.2016.7522799","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522799","url":null,"abstract":"The design of miniaturized metamaterial absorber is based on the modified Minkowski(M-Minkowski) fractal structure. The proposed absorber is composed of M- Minkowski fractal structure in the top layer etched on dielectric substrate with the lower metal plate. The simulated results indicate that the metamaterial absorber has dual-band absorbing peaks with high absorptivity (>99%). The absorber is insensitive to polarization and has a wide angles(upto 60o) characteristic of incident waves for both TE and TM mode. The proposed absorber can reduce the absorption response bands and further implement miniaturization comparing with the Minkowski fractal structure.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122308023","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522786
Kun Liu, Chuan Wang, Huilian She
In order to estimate the critical electric field intensity of soil ionization, we consider relationship between the differential form of ohm's law and the moment when soil just begin to ionize. And then the critical electric field intensity of soil A which presented in Liew's literature was estimated by the relationship. The effectiveness of the proposed method was verified by the soil A, yielding satisfactory agreement. The result show this method can help us to determine the critical electric field intensity Ec.
{"title":"Estimation of critical electric field intensity of soil ionization base on the ohm's law","authors":"Kun Liu, Chuan Wang, Huilian She","doi":"10.1109/APEMC.2016.7522786","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522786","url":null,"abstract":"In order to estimate the critical electric field intensity of soil ionization, we consider relationship between the differential form of ohm's law and the moment when soil just begin to ionize. And then the critical electric field intensity of soil A which presented in Liew's literature was estimated by the relationship. The effectiveness of the proposed method was verified by the soil A, yielding satisfactory agreement. The result show this method can help us to determine the critical electric field intensity Ec.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126628974","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522765
L. Kun, Guo Junfeng, Shen Huilian
The communication tower leads to a regional increasing lightning density to a certain extent, which brings about more serious threat of lightning electromagnetic interference and lightning invasion. Since the malfunction or permanent damage of electronic equipment caused by harsh electromagnetic environment is mainly attributed to magnetic field, the magnetic field around the tower is analyzed in detail in this paper. A ten meters high communication station tower model was established by CST studio. Then, the transient electromagnetic response when the tower is struck by lightning directly and the space distribution of magnetic field around the tower were analyzed. The results show that the magnetic fields inside tower are much smaller than outside. And the amplitudes of magnetic fields are not monotonically changing with height.
{"title":"Research on the distribution of magnetic field around communication tower when struck by lightning","authors":"L. Kun, Guo Junfeng, Shen Huilian","doi":"10.1109/APEMC.2016.7522765","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522765","url":null,"abstract":"The communication tower leads to a regional increasing lightning density to a certain extent, which brings about more serious threat of lightning electromagnetic interference and lightning invasion. Since the malfunction or permanent damage of electronic equipment caused by harsh electromagnetic environment is mainly attributed to magnetic field, the magnetic field around the tower is analyzed in detail in this paper. A ten meters high communication station tower model was established by CST studio. Then, the transient electromagnetic response when the tower is struck by lightning directly and the space distribution of magnetic field around the tower were analyzed. The results show that the magnetic fields inside tower are much smaller than outside. And the amplitudes of magnetic fields are not monotonically changing with height.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125440029","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522792
Kaitian Huang, Y. Zhanqing, Zhiye Gao, R. Zeng, Min Li, Lei Liu
Corona discharge appears near the HVDC lines when the surface electric field strength of the line is higher than the corona incept field. Ion flow will be formed under the affection electric field near conductors. Ion flow is a non-equilibrium plasma at low temperature, they are distributed among lines and the earth. Measurements of the DC synthetic electric field is important for the evaluation of the EMC of electric devices. Among several measuring methods, MEMS sensor is a new but useful one. When a MEMS electric field sensor with packaging is put into the area, charges will accumulate onto the shell of the sensor in a quick transient charging process and generate a reverse field. After the process finished, there exists an “empty zone” near the sensor where no charges in it. This paper studies the charging process of ion flow on packaging shell and the effects it cause, by using FEM simulation method and Multiphysics analysis, to provide theoretical basis for the design of MEMS sensors used for measuring electric field near HVDC. According to this paper, the effect of “empty zone” is lower than that of ion flow, the electric field changes it causes is about 50 V/m at the background target field 15 kV/m, while field changes caused by the ion flow among the area outside the sensor could be several dozen times of it.
{"title":"The charging process on sensor's shell in ion flow field and its influence towards electric field near HVDC lines","authors":"Kaitian Huang, Y. Zhanqing, Zhiye Gao, R. Zeng, Min Li, Lei Liu","doi":"10.1109/APEMC.2016.7522792","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522792","url":null,"abstract":"Corona discharge appears near the HVDC lines when the surface electric field strength of the line is higher than the corona incept field. Ion flow will be formed under the affection electric field near conductors. Ion flow is a non-equilibrium plasma at low temperature, they are distributed among lines and the earth. Measurements of the DC synthetic electric field is important for the evaluation of the EMC of electric devices. Among several measuring methods, MEMS sensor is a new but useful one. When a MEMS electric field sensor with packaging is put into the area, charges will accumulate onto the shell of the sensor in a quick transient charging process and generate a reverse field. After the process finished, there exists an “empty zone” near the sensor where no charges in it. This paper studies the charging process of ion flow on packaging shell and the effects it cause, by using FEM simulation method and Multiphysics analysis, to provide theoretical basis for the design of MEMS sensors used for measuring electric field near HVDC. According to this paper, the effect of “empty zone” is lower than that of ion flow, the electric field changes it causes is about 50 V/m at the background target field 15 kV/m, while field changes caused by the ion flow among the area outside the sensor could be several dozen times of it.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121464276","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522927
Tao Song, Mengjun Wang, Panpan Zuo, Jianying Liu
The accurate measurement of near-field EMI of Printed circuit board (PCB) and electronic equipment is essential nowadays. The photoelectric type probe could provide a better solution to the near-field measurement. In this paper, a combined with copper-clad laminate and electron component, the strip line embedded into PCB basal lamina is designed to get a specific frequency response. However, in consideration of the spatial electro-magnetic disturbance and the high-frequency harmonic jamming from the power supply to the probe, a photoelectric type power supply is proposed to make the power tunable. a structure of the strip line is simulated and analyzed. By changing the value of the patch capacitance between the strip line and the copper-clad laminate, three fixed resonance frequency points are located at 327.046MHz, 1.699GHz and 2.439GHz. The probe proposed in this paper can be widely used in near-field EMI testing.
{"title":"A photoelectric type tunable frequency probe for near-field EMI measurement","authors":"Tao Song, Mengjun Wang, Panpan Zuo, Jianying Liu","doi":"10.1109/APEMC.2016.7522927","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522927","url":null,"abstract":"The accurate measurement of near-field EMI of Printed circuit board (PCB) and electronic equipment is essential nowadays. The photoelectric type probe could provide a better solution to the near-field measurement. In this paper, a combined with copper-clad laminate and electron component, the strip line embedded into PCB basal lamina is designed to get a specific frequency response. However, in consideration of the spatial electro-magnetic disturbance and the high-frequency harmonic jamming from the power supply to the probe, a photoelectric type power supply is proposed to make the power tunable. a structure of the strip line is simulated and analyzed. By changing the value of the patch capacitance between the strip line and the copper-clad laminate, three fixed resonance frequency points are located at 327.046MHz, 1.699GHz and 2.439GHz. The probe proposed in this paper can be widely used in near-field EMI testing.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117354442","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522807
Weiqi Gao, Zheng Kou, Pengfei Ding
By use of French mesoscale non-hydrostatic numerical model Meso-NH, using two kinds of ice phase particles scheme: ICE3 scheme (no hail), ICE4 scheme (with hail), simulate the thunderstorm clouds charge structure, lightning flash rates to explore the impact of the hail process on the microphysical and electrical processes of the thunderstorm clouds. The results showed that: 1) ICE4 scheme of thunderstorm duration is shorter than ICE3 scheme, from ICE3 to ICE4, lightning flash rates display significantly reduced; 2) After addition of hail, thunderstorm cloud charge structure changes very little, charge density of ICE4 scheme significantly less than ICE3 scheme; 3) With the ICE4 scheme, lightning flash peak occurred after precipitation of hail.
{"title":"A numerical study of hail process effects on charge structure and lightning flash rate of thunderstorms","authors":"Weiqi Gao, Zheng Kou, Pengfei Ding","doi":"10.1109/APEMC.2016.7522807","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522807","url":null,"abstract":"By use of French mesoscale non-hydrostatic numerical model Meso-NH, using two kinds of ice phase particles scheme: ICE3 scheme (no hail), ICE4 scheme (with hail), simulate the thunderstorm clouds charge structure, lightning flash rates to explore the impact of the hail process on the microphysical and electrical processes of the thunderstorm clouds. The results showed that: 1) ICE4 scheme of thunderstorm duration is shorter than ICE3 scheme, from ICE3 to ICE4, lightning flash rates display significantly reduced; 2) After addition of hail, thunderstorm cloud charge structure changes very little, charge density of ICE4 scheme significantly less than ICE3 scheme; 3) With the ICE4 scheme, lightning flash peak occurred after precipitation of hail.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127841562","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}
The electromagnetic waves emitted from devices can be a source of information leakage and can cause electromagnetic compatibility (EMC) problems. Electromagnetic radiation signal from computer display can be seen as a computer security risk if the radiation signal is intercepted and reconstructed. In addition to the image information displayed by the computer, electromagnetic radiation leaks the hardware information of the computer itself which is more important for some attackers, protectors and security inspection workers. In this paper, we model the electromagnetic radiate video signal and theoretically prove that variation trend of spectrum harmonics of electromagnetic radiate video signal vary between different computers. Based on the model we propose spectral centroid based algorithm (SP algorithm) to identify computers. By using the algorithm, we can automatically and accurately identify computers through electromagnetic radiation.
{"title":"A new method to recognize computer through electromagnetic radiation based on spectral centroid","authors":"Degang Sun, Jun Shi, Dong Wei, Meng Zhang, Wei-qing Huang, Xuguang Qiu","doi":"10.1109/APEMC.2016.7523003","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7523003","url":null,"abstract":"The electromagnetic waves emitted from devices can be a source of information leakage and can cause electromagnetic compatibility (EMC) problems. Electromagnetic radiation signal from computer display can be seen as a computer security risk if the radiation signal is intercepted and reconstructed. In addition to the image information displayed by the computer, electromagnetic radiation leaks the hardware information of the computer itself which is more important for some attackers, protectors and security inspection workers. In this paper, we model the electromagnetic radiate video signal and theoretically prove that variation trend of spectrum harmonics of electromagnetic radiate video signal vary between different computers. Based on the model we propose spectral centroid based algorithm (SP algorithm) to identify computers. By using the algorithm, we can automatically and accurately identify computers through electromagnetic radiation.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"2010 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127345844","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522790
Donglin Meng
An improved method is proposed to adequately validate the performance of a semi-anechoic chamber (SAC) from 200 MHz to 1000 MHz, by replacing the transmit antenna (Tx) from a log-periodic dipole array (LPDA) antenna with a mini-biconical antenna. SACs are widely used to make radiated emission (RE) measurements, and for each SAC, after newly construction or after several years, a validation must be made to make sure it is good enough to make RE measurements. However, in present standard such as CISPR 16-1-4:2012 or ANSI C63.4:2014, a directive antenna, e.g. LPDA is always used as the Tx from 200 MHz / 300 MHz to 1000 MHz. This is based on a questionable assumption that the RE from an equipment under test (EUT) is directional over this frequency band. Comparisons are made by measuring SACs with a LPDA and a mini-biconical antennas as the Tx, respectively. The measured results show that for a good SAC, the performance is slightly degraded once the Tx is changed from a LPDA into a mini-biconical antenna; however, for a compact SAC, the change is fairly larger. This shows the improved method is more sensitive to the real performance of a SAC.
{"title":"New method to validate the performance of SACs from 200 MHz to 1000 MHz","authors":"Donglin Meng","doi":"10.1109/APEMC.2016.7522790","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522790","url":null,"abstract":"An improved method is proposed to adequately validate the performance of a semi-anechoic chamber (SAC) from 200 MHz to 1000 MHz, by replacing the transmit antenna (Tx) from a log-periodic dipole array (LPDA) antenna with a mini-biconical antenna. SACs are widely used to make radiated emission (RE) measurements, and for each SAC, after newly construction or after several years, a validation must be made to make sure it is good enough to make RE measurements. However, in present standard such as CISPR 16-1-4:2012 or ANSI C63.4:2014, a directive antenna, e.g. LPDA is always used as the Tx from 200 MHz / 300 MHz to 1000 MHz. This is based on a questionable assumption that the RE from an equipment under test (EUT) is directional over this frequency band. Comparisons are made by measuring SACs with a LPDA and a mini-biconical antennas as the Tx, respectively. The measured results show that for a good SAC, the performance is slightly degraded once the Tx is changed from a LPDA into a mini-biconical antenna; however, for a compact SAC, the change is fairly larger. This shows the improved method is more sensitive to the real performance of a SAC.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132611793","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522924
Huapeng Zhao, Jun Hu, Z. Chen
In order to reduce memory cost, this paper applies block Gauss-Seidel method to solve the unknowns in hybrid discrete singular convolution (DSC)-method of moments (MoM) modeling of reverberation chambers. Based on block Gauss-Seidel method, the DSC and MoM sub-problems are alternatively solved until convergence is achieved. Compared to existing methods, the proposed solution method significantly saves memory cost. Simulations are performed to study the convergence behavior of the proposed method.
{"title":"An alternative solution method for hybrid discrete singular convolution-method of moments modeling of reverberation chambers","authors":"Huapeng Zhao, Jun Hu, Z. Chen","doi":"10.1109/APEMC.2016.7522924","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522924","url":null,"abstract":"In order to reduce memory cost, this paper applies block Gauss-Seidel method to solve the unknowns in hybrid discrete singular convolution (DSC)-method of moments (MoM) modeling of reverberation chambers. Based on block Gauss-Seidel method, the DSC and MoM sub-problems are alternatively solved until convergence is achieved. Compared to existing methods, the proposed solution method significantly saves memory cost. Simulations are performed to study the convergence behavior of the proposed method.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"186 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116605788","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522942
J. Schutt-Ainé
The main challenge in the synthesis of macromodel-based SPICE subcircuits resides in the accurate representation of the complex-pole residue pairs from the rational function expansion. This paper examines the different circuit topologies that can be used from the scattering parameter description. The circuit extraction algorithms are studied and tested through the use of simulation to verify the robustness and accuracy of these models.
{"title":"SPICE circuit synthesis from complex pole-residue S-parameter representation","authors":"J. Schutt-Ainé","doi":"10.1109/APEMC.2016.7522942","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522942","url":null,"abstract":"The main challenge in the synthesis of macromodel-based SPICE subcircuits resides in the accurate representation of the complex-pole residue pairs from the rational function expansion. This paper examines the different circuit topologies that can be used from the scattering parameter description. The circuit extraction algorithms are studied and tested through the use of simulation to verify the robustness and accuracy of these models.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"5 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116661529","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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