Pub Date : 2010-01-10DOI: 10.1109/RWS.2010.5434147
S. Okabe, T. Ikeda, F. Suginoshita, K. Shogen, A. Hirata, M. Yaita, N. Kukutsu, Y. Kado
We are developing elemental technologies for next-generation high-speed wireless links for transmitting program materials in live broadcasts. In particular, we are developing a 10-Gbps forward error correction (FEC) system for transmitting multiplexed HD-SDI wireless signals in the 120-GHz-band. The system can send error-free 10-Gbps data transmissions over a distance of 3 km. This paper describes FEC for 120-GHz-band wireless transmissions and the results of indoor and outdoor transmission experiments that measured the BER characteristics of transmission using 10-Gbps FEC systems.
{"title":"10-Gbps forward error correction system for 120-GHz-band wireless transmission","authors":"S. Okabe, T. Ikeda, F. Suginoshita, K. Shogen, A. Hirata, M. Yaita, N. Kukutsu, Y. Kado","doi":"10.1109/RWS.2010.5434147","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434147","url":null,"abstract":"We are developing elemental technologies for next-generation high-speed wireless links for transmitting program materials in live broadcasts. In particular, we are developing a 10-Gbps forward error correction (FEC) system for transmitting multiplexed HD-SDI wireless signals in the 120-GHz-band. The system can send error-free 10-Gbps data transmissions over a distance of 3 km. This paper describes FEC for 120-GHz-band wireless transmissions and the results of indoor and outdoor transmission experiments that measured the BER characteristics of transmission using 10-Gbps FEC systems.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126923035","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434234
S. Pan, J. Yao
We propose and demonstrate a simple and novel method to generate a quasi-single-sideband (QSSB) optical ultra-wideband (UWB) signal using a dual-drive Mach-Zehnder modulator. To evaluate the transmission performance of the generated QSSB UWB signal, an analytical model is developed with the evolution of the waveforms and the spectra with the transmission distance studied. The theoretical analysis is verified by an experiment. Eye diagrams, electrical spectra and bit-error rate measurement show that the proposed system has a good tolerance to the chromatic dispersion (CD) of single mode fiber (SMF).
{"title":"Transmission of 1.25-Gb/s quasi-single-sideband optical UWB signals over single-mode fiber","authors":"S. Pan, J. Yao","doi":"10.1109/RWS.2010.5434234","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434234","url":null,"abstract":"We propose and demonstrate a simple and novel method to generate a quasi-single-sideband (QSSB) optical ultra-wideband (UWB) signal using a dual-drive Mach-Zehnder modulator. To evaluate the transmission performance of the generated QSSB UWB signal, an analytical model is developed with the evolution of the waveforms and the spectra with the transmission distance studied. The theoretical analysis is verified by an experiment. Eye diagrams, electrical spectra and bit-error rate measurement show that the proposed system has a good tolerance to the chromatic dispersion (CD) of single mode fiber (SMF).","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131746214","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434226
Michael Lewis, K. Hsu
This work outlines the design and implementation of an ad-hoc wireless networking capable multi-protocol RFID reader system, called TelosRFID. The name TelosRFID stems from the system's combination of Crossbow Telos rev. B (TelosB) ZigBee motes with a custom 13.56MHz RFID reader board. Custom firmware enables the TelosB motes to construct an ad-hoc ZigBee network and relay RFID tag data from the custom reader board back to a client PC.
这项工作概述了一个具有多协议无线网络功能的自组织RFID阅读器系统的设计和实现，称为TelosRFID。TelosRFID的名称源于该系统将Crossbow Telos rev. B (TelosB) ZigBee motes与定制的13.56MHz RFID读取器板结合在一起。自定义固件使TelosB motes能够构建自定义ZigBee网络，并将RFID标签数据从自定义读取器板传回客户端PC。
{"title":"TelosRFID: An ad-hoc wireless networking capable multi-protocol RFID reader system","authors":"Michael Lewis, K. Hsu","doi":"10.1109/RWS.2010.5434226","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434226","url":null,"abstract":"This work outlines the design and implementation of an ad-hoc wireless networking capable multi-protocol RFID reader system, called TelosRFID. The name TelosRFID stems from the system's combination of Crossbow Telos rev. B (TelosB) ZigBee motes with a custom 13.56MHz RFID reader board. Custom firmware enables the TelosB motes to construct an ad-hoc ZigBee network and relay RFID tag data from the custom reader board back to a client PC.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"686 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132584403","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434237
H. Tsuchiya, K. Umebayashi, Y. Kamiya, Yasuo Suzuki
This paper investigates a cooperative spectrum sensing to implement the spectrum sharing system. In the cooperative sensing, observations of multiple secondary users (SUs) are used to detect presence of PS. There are two approaches in cooperative sensing. The first approach is non-weighted cooperative sensing (NWCS). The second approach is a weighted cooperative sensing (WCS) where the weight is used to enhance the sensing performance. In this paper, we study a WCS, where the weight is designed based on a PS signal energy and the noise power. To estimate the PS signal energy, an estimation method is employed. In addition, our WCS implements plural antenna elements to suppress the effect of Rayleigh fading. Computer simulations show that the proposed WCS can outperform the conventional NWCS under shadow and Rayleigh fading environment.
{"title":"Weighted cooperative sensing with plural antenna elements","authors":"H. Tsuchiya, K. Umebayashi, Y. Kamiya, Yasuo Suzuki","doi":"10.1109/RWS.2010.5434237","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434237","url":null,"abstract":"This paper investigates a cooperative spectrum sensing to implement the spectrum sharing system. In the cooperative sensing, observations of multiple secondary users (SUs) are used to detect presence of PS. There are two approaches in cooperative sensing. The first approach is non-weighted cooperative sensing (NWCS). The second approach is a weighted cooperative sensing (WCS) where the weight is used to enhance the sensing performance. In this paper, we study a WCS, where the weight is designed based on a PS signal energy and the noise power. To estimate the PS signal energy, an estimation method is employed. In addition, our WCS implements plural antenna elements to suppress the effect of Rayleigh fading. Computer simulations show that the proposed WCS can outperform the conventional NWCS under shadow and Rayleigh fading environment.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129276251","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434117
T. Bjorninen, L. Ukkonen, L. Sydanheimo
A compact slot type tag antenna design for passive UHF RFID is presented. Advantages of slot type radiators in UHF RFID are discussed. Physical operation principle of the proposed antenna structure is explained and explored by simulations. Modeling results at different design stages are presented and a case study of realization of impedance matching to a specific RFID IC is discussed. Design verification is done by wireless protocol-based measurements, results are presented and compared with our previous tag antenna designs.
{"title":"Design and non-invasive design verification of a slot-type passive UHF RFID tag","authors":"T. Bjorninen, L. Ukkonen, L. Sydanheimo","doi":"10.1109/RWS.2010.5434117","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434117","url":null,"abstract":"A compact slot type tag antenna design for passive UHF RFID is presented. Advantages of slot type radiators in UHF RFID are discussed. Physical operation principle of the proposed antenna structure is explained and explored by simulations. Modeling results at different design stages are presented and a case study of realization of impedance matching to a specific RFID IC is discussed. Design verification is done by wireless protocol-based measurements, results are presented and compared with our previous tag antenna designs.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"157 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132402408","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434256
M. Kuhn, M. Awida, M. Mahfouz, A. Fathy
We have simulated and experimentally tested a coaxial probe measuring system to be used in distinguishing between normal (healthy) breast tissue and cancerous (often malignant) breast tissue. The system employs commercially available components including an Agilent 8363B phase network analyzer (PNA) and an Agilent 85070D dielectric probe. Instead of the Agilent software three material calibration technique, we propose a four material calibration method across the frequency range of 3–17 GHz for more robust measurements of the complex permittivity. Experimental results on human and snake tissues show the non-homogeneous nature of biological tissues and also illuminate the dependence of complex permittivity on tissue temperature. Building upon the differences and also the variation seen in complex permittivity in literature between normal and cancerous breast tissue across this frequency range, we propose a technique which utilizes a neural network where multiple measurements are input in making the final decision on whether or not the tissue under test is cancerous. Simulation results using Ansoft HFSS are provided here and show the potential of microwave diagnosis of breast cancer.
{"title":"Open-ended coaxial probe measurements for breast cancer detection","authors":"M. Kuhn, M. Awida, M. Mahfouz, A. Fathy","doi":"10.1109/RWS.2010.5434256","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434256","url":null,"abstract":"We have simulated and experimentally tested a coaxial probe measuring system to be used in distinguishing between normal (healthy) breast tissue and cancerous (often malignant) breast tissue. The system employs commercially available components including an Agilent 8363B phase network analyzer (PNA) and an Agilent 85070D dielectric probe. Instead of the Agilent software three material calibration technique, we propose a four material calibration method across the frequency range of 3–17 GHz for more robust measurements of the complex permittivity. Experimental results on human and snake tissues show the non-homogeneous nature of biological tissues and also illuminate the dependence of complex permittivity on tissue temperature. Building upon the differences and also the variation seen in complex permittivity in literature between normal and cancerous breast tissue across this frequency range, we propose a technique which utilizes a neural network where multiple measurements are input in making the final decision on whether or not the tissue under test is cancerous. Simulation results using Ansoft HFSS are provided here and show the potential of microwave diagnosis of breast cancer.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124426983","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434128
C. Mikeka, H. Arai
This paper presents a batteryless transmitter for wireless sensor systems. Unlike the conventional battery powered sensor transmitters, our proposed transmitter is powered from a cellular energy-harvesting circuit, a microwave energy transmission technique that has capacity to harvest 3.2 V in 5.5 hours at 0 dBm of incident cellular signals (2 GHz). The transmitter is built around a 2.4 GHz nRF24L01+ programmable radio chip, controlled by a PIC16F877A MCU via a Serial Peripheral Interface (SPI). A 5 min successful locked carrier transmit test was carried out at ISM band channels (2.402, 2.440, and 2.850 GHz). The cellular energy-harvesting circuit described in this work is rated 36.16 mW max, given 11.3 mA maximum transmit drain current.
{"title":"Development of a batteryless sensor transmitter","authors":"C. Mikeka, H. Arai","doi":"10.1109/RWS.2010.5434128","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434128","url":null,"abstract":"This paper presents a batteryless transmitter for wireless sensor systems. Unlike the conventional battery powered sensor transmitters, our proposed transmitter is powered from a cellular energy-harvesting circuit, a microwave energy transmission technique that has capacity to harvest 3.2 V in 5.5 hours at 0 dBm of incident cellular signals (2 GHz). The transmitter is built around a 2.4 GHz nRF24L01+ programmable radio chip, controlled by a PIC16F877A MCU via a Serial Peripheral Interface (SPI). A 5 min successful locked carrier transmit test was carried out at ISM band channels (2.402, 2.440, and 2.850 GHz). The cellular energy-harvesting circuit described in this work is rated 36.16 mW max, given 11.3 mA maximum transmit drain current.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115364753","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434181
K. Yamashita, Takeshi Yamamoto, H. Seita, E. Shimane, S. Kawasaki
5.8 GHz band digital phase shifters to control a beam direction for an Active Integrated Phased Array Antenna (AIPAA) are designed. The 4-bit phase shifters with integrated GaAs FET SPDT switches are integrated with an LTCC substrate. We realized a low loss 4-bit LTCC phase shifter with the size of 10 mm × 13 mm × 0.55 mm. From the simulation results, the insertion loss of LTCC phase shifter without the switch is simulated with about 0.5dB/bit. The insertion loss of the LTCC phase shifter integrated with the GaAs FET SPDT switches and phase error are measured to be about 2.3dB/bit and less than 15°, respectively. In addition, beam scanning with angles of ±30 degrees was successfully achieved with 10 Mbps MSK signal from the 16-element active integrated phased array antenna.
设计了用于有源集成相控阵天线(AIPAA)波束方向控制的5.8 GHz频段数字移相器。集成GaAs FET SPDT开关的4位移相器集成在LTCC衬底上。我们实现了一个低损耗的4位LTCC移相器，尺寸为10 mm × 13 mm × 0.55 mm。从仿真结果来看，不带开关的LTCC移相器的插入损耗仿真值约为0.5dB/bit。与GaAs FET SPDT开关集成的LTCC移相器的插入损耗和相位误差分别为2.3dB/bit和小于15°。此外，利用16元有源集成相控阵天线的10 Mbps MSK信号，成功实现了±30度角的波束扫描。
{"title":"A 16-element power AIPAA with a 4-bit digital LTCC phase shifter operating at the 5.8 GHz-band for wireless communication and power transmission","authors":"K. Yamashita, Takeshi Yamamoto, H. Seita, E. Shimane, S. Kawasaki","doi":"10.1109/RWS.2010.5434181","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434181","url":null,"abstract":"5.8 GHz band digital phase shifters to control a beam direction for an Active Integrated Phased Array Antenna (AIPAA) are designed. The 4-bit phase shifters with integrated GaAs FET SPDT switches are integrated with an LTCC substrate. We realized a low loss 4-bit LTCC phase shifter with the size of 10 mm × 13 mm × 0.55 mm. From the simulation results, the insertion loss of LTCC phase shifter without the switch is simulated with about 0.5dB/bit. The insertion loss of the LTCC phase shifter integrated with the GaAs FET SPDT switches and phase error are measured to be about 2.3dB/bit and less than 15°, respectively. In addition, beam scanning with angles of ±30 degrees was successfully achieved with 10 Mbps MSK signal from the 16-element active integrated phased array antenna.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"25 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121014645","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434115
J. Staudinger, G. Bouisse, J. Kinney
An asymmetric Doherty power amplifier based upon a three-device architecture for improved efficiency performance under extended power backoff operation is presented. The topology provides significant advantages in easing input/output matching constraints inherent in asymmetric Doherty amplifiers where the asymmetry necessitates unequal device geometries for the peaking and carrier sub-amplifier circuits. Excellent high efficiency performance (45% @ 8 dB power back-off) is demonstrated by implementing the Doherty amplifier using an advanced prototype LDMOS device technology developed at Freescale Semiconductor. The amplifier achieves a saturated output power greater than 450W at 2.14 GHz when biased with a 28V supply. When driven with a single carrier W-CDMA signal, an efficiency of 45% is achieved at 8 dB power back-off. Moreover, when linearized with a digital feedback pre-distorter the amplifier achieves an ACPR better than −55 dB.
{"title":"High efficiency 450W asymmetric three-device Doherty amplifier with digital feedback predistortion","authors":"J. Staudinger, G. Bouisse, J. Kinney","doi":"10.1109/RWS.2010.5434115","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434115","url":null,"abstract":"An asymmetric Doherty power amplifier based upon a three-device architecture for improved efficiency performance under extended power backoff operation is presented. The topology provides significant advantages in easing input/output matching constraints inherent in asymmetric Doherty amplifiers where the asymmetry necessitates unequal device geometries for the peaking and carrier sub-amplifier circuits. Excellent high efficiency performance (45% @ 8 dB power back-off) is demonstrated by implementing the Doherty amplifier using an advanced prototype LDMOS device technology developed at Freescale Semiconductor. The amplifier achieves a saturated output power greater than 450W at 2.14 GHz when biased with a 28V supply. When driven with a single carrier W-CDMA signal, an efficiency of 45% is achieved at 8 dB power back-off. Moreover, when linearized with a digital feedback pre-distorter the amplifier achieves an ACPR better than −55 dB.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120955647","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434191
Xuetao Chen, S. Hasan, T. Bose, Jeffrey H. Reed
The allocation of communication power consumption and computing rate is inherently one of the cross-layer problems in wireless distributed computing networks (WDCNs). This paper exploits a subgradient approach to choose the optimal power-rate pair for maximizing the network computing capability and minimizing the power consumption. The impact of heterogeneous channel conditions for different nodes are modeled as a penalty term in the objective function to balance the performance and power consumption, and increase the amount of the power for the computing task. Simulation results show that both energy efficiency and the distributed computing power ratio (DCPR) can be increased by considering the wireless channel conditions. These results provide some guidelines for designing the protocol dedicated to WDCNs.
{"title":"Cross-layer resource allocation for wireless distributed computing networks","authors":"Xuetao Chen, S. Hasan, T. Bose, Jeffrey H. Reed","doi":"10.1109/RWS.2010.5434191","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434191","url":null,"abstract":"The allocation of communication power consumption and computing rate is inherently one of the cross-layer problems in wireless distributed computing networks (WDCNs). This paper exploits a subgradient approach to choose the optimal power-rate pair for maximizing the network computing capability and minimizing the power consumption. The impact of heterogeneous channel conditions for different nodes are modeled as a penalty term in the objective function to balance the performance and power consumption, and increase the amount of the power for the computing task. Simulation results show that both energy efficiency and the distributed computing power ratio (DCPR) can be increased by considering the wireless channel conditions. These results provide some guidelines for designing the protocol dedicated to WDCNs.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"280 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121406001","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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