Pub Date : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827732
F. Grimminger, G. Kowalczyk, Hartwig Unterassinger, Andre Schwarzmeier, G. Fischer, R. Weigel, D. Kissinger
This work presents the implementation of an asynchronous event detector circuit by applying subthreshold standard cells. The presented circuit operates in an on-chip power management unit (PMU) of a wireless sensor node. Such an application demands an ultra-low power architecture fur an increased overall lifetime of the sensor node. The asynchronous circuit architecture and its subthreshold logic implementation both significantly reduce the leakage power dissipation by factor three. The presented event detector is realized in a 130nm CMOS process with regular transistors operating from a 200 mV supply voltage.
{"title":"Asynchronous subthreshold CMOS event detector for wireless BAN sensor nodes","authors":"F. Grimminger, G. Kowalczyk, Hartwig Unterassinger, Andre Schwarzmeier, G. Fischer, R. Weigel, D. Kissinger","doi":"10.1109/BIOWIRELESS.2014.6827732","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827732","url":null,"abstract":"This work presents the implementation of an asynchronous event detector circuit by applying subthreshold standard cells. The presented circuit operates in an on-chip power management unit (PMU) of a wireless sensor node. Such an application demands an ultra-low power architecture fur an increased overall lifetime of the sensor node. The asynchronous circuit architecture and its subthreshold logic implementation both significantly reduce the leakage power dissipation by factor three. The presented event detector is realized in a 130nm CMOS process with regular transistors operating from a 200 mV supply voltage.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121793084","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 : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827727
X. Hu, Guofen Yu, Ji Wei Sun, David Moline, Pingshan Wang
Radio-frequency (RF) measurements provide a potentially label-free approach for quantitative analysis of cells and particles in microfluidic channels. We demonstrate an interference based RF sensor which operates from 5 MHz to 2 GHz at high sensitivity. Millimeter-sized gold and amazonite particles show particle position, size, and material strongly affect quantitative RF measurements. Lossy materials do not significantly reduce the effective quality factor, which is as high as 30,000 at 1.2 GHz, of the sensor. Thus, the sensor is particularly suitable for biomedical applications such as skin cancer detection and the development of novel label-free and all electronic rheological instrumentation.
{"title":"Radio frequency detection and analysis of synthetic particles","authors":"X. Hu, Guofen Yu, Ji Wei Sun, David Moline, Pingshan Wang","doi":"10.1109/BIOWIRELESS.2014.6827727","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827727","url":null,"abstract":"Radio-frequency (RF) measurements provide a potentially label-free approach for quantitative analysis of cells and particles in microfluidic channels. We demonstrate an interference based RF sensor which operates from 5 MHz to 2 GHz at high sensitivity. Millimeter-sized gold and amazonite particles show particle position, size, and material strongly affect quantitative RF measurements. Lossy materials do not significantly reduce the effective quality factor, which is as high as 30,000 at 1.2 GHz, of the sensor. Thus, the sensor is particularly suitable for biomedical applications such as skin cancer detection and the development of novel label-free and all electronic rheological instrumentation.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121110133","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 : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827733
Zhao Li, H. Lv, Yang Zhang, G. Lu, Sheng Li, X. Jing, Jianqi Wang
Being capable of detecting vital signs of human beings, impulse radio ultra wideband (IR-UWB) radar can be applied to search and rescue (SAR) operation in post-disaster scenarios to detect trapped survivors under collapsed buildings. In the application, IR-UWB radar systems with a low center frequency are commonly used to guarantee good penetrability. These systems transmit pulses with nanosecond width. So they have relatively low range resolution, which in turn impacts their performance of detecting the vital signs. To cope with the problem, a dual-frequency IR-UWB radar system is developed. The system combines two IR-UWB radars with different center frequencies, namely 400 MHz and 270 MHz, and utilizes time division multiplexing, composite antenna array and novel signal processing techniques to ensure its compatibility and performance. Experimental results are also presented to show the system's advantages over single-frequency IR-UWB radar systems.
{"title":"Detection of trapped survivors using 270/400 MHz dual-frequency IR-UWB radar based on time division multiplexing","authors":"Zhao Li, H. Lv, Yang Zhang, G. Lu, Sheng Li, X. Jing, Jianqi Wang","doi":"10.1109/BIOWIRELESS.2014.6827733","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827733","url":null,"abstract":"Being capable of detecting vital signs of human beings, impulse radio ultra wideband (IR-UWB) radar can be applied to search and rescue (SAR) operation in post-disaster scenarios to detect trapped survivors under collapsed buildings. In the application, IR-UWB radar systems with a low center frequency are commonly used to guarantee good penetrability. These systems transmit pulses with nanosecond width. So they have relatively low range resolution, which in turn impacts their performance of detecting the vital signs. To cope with the problem, a dual-frequency IR-UWB radar system is developed. The system combines two IR-UWB radars with different center frequencies, namely 400 MHz and 270 MHz, and utilizes time division multiplexing, composite antenna array and novel signal processing techniques to ensure its compatibility and performance. Experimental results are also presented to show the system's advantages over single-frequency IR-UWB radar systems.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129362565","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 : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827736
Andre Schwarzmeier, R. Weigel, G. Fischer, D. Kissinger
This paper presents a fall detection and activity monitoring system comprised of a server software for data management, multiple UHF RFID readers and an energy efficient, small and lightweight semi-passive UHF RFID sensor tag. The system is able to gather activity and indoor localization data of several persons wearing just one sensor tag, making it particularly suitable for the use in nursing facilities or hospitals. The implemented fall detection alerts nursing staff in case of a detected fall and allows quick intervention in case of an emergency.
{"title":"A low power fall detection and activity monitoring system for nursing facilities and hospitals","authors":"Andre Schwarzmeier, R. Weigel, G. Fischer, D. Kissinger","doi":"10.1109/BIOWIRELESS.2014.6827736","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827736","url":null,"abstract":"This paper presents a fall detection and activity monitoring system comprised of a server software for data management, multiple UHF RFID readers and an energy efficient, small and lightweight semi-passive UHF RFID sensor tag. The system is able to gather activity and indoor localization data of several persons wearing just one sensor tag, making it particularly suitable for the use in nursing facilities or hospitals. The implemented fall detection alerts nursing staff in case of a detected fall and allows quick intervention in case of an emergency.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129468781","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 : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827726
D. Zito, D. Pepe
An ultra-wideband (UWB) pulse radar sensor consisting of a system-on-a-chip radar transceiver and planar differential antennas has been implemented and applied to the contactless detection of the respiration activity of adult and infant. The field operational tests show that the radar sensor tracks the respiratory rate and pattern of person under test through the contactless detection of thorax and abdomen movements in a range of conditions, allowing the continuous-time non-invasive monitoring of adult and infant prone to obstructive apneas or other respiratory diseases.
{"title":"Monitoring respiratory pattern in adult and infant via contactless detection of thorax and abdomen movements through SoC UWB pulse radar sensor","authors":"D. Zito, D. Pepe","doi":"10.1109/BIOWIRELESS.2014.6827726","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827726","url":null,"abstract":"An ultra-wideband (UWB) pulse radar sensor consisting of a system-on-a-chip radar transceiver and planar differential antennas has been implemented and applied to the contactless detection of the respiration activity of adult and infant. The field operational tests show that the radar sensor tracks the respiratory rate and pattern of person under test through the contactless detection of thorax and abdomen movements in a range of conditions, allowing the continuous-time non-invasive monitoring of adult and infant prone to obstructive apneas or other respiratory diseases.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"os-13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127972469","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 : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827741
Shin Okamoto, T. Tsujioka, S. Hara, Hajime Nakamura, Takashi Kawabata, Kenji Watanabe, M. Ise, Noa Arime, H. Okuhata
In recent years, the vital data of athletes during training and game have been used to plan effective training menus and avoid injuries and diseases, where a vital sensor node is often mounted at the chest position of an athlete. One of the main problems is that a tri-axis accelerometer sensor should be mounted at a different position such as rear waist for accurate energy expenditure (EE) estimation whereas an electro-cardio-gram (ECG) sensor should be separately mounted at a chest position for accurate heart rate (HR) estimation. In this paper, we newly design a wireless waist-mounted vital sensor node for both EE and HR estimations. First of all, to select a microcontroller suitable for the data processing in the vital sensor node, we numerically compared three microcontrollers in terms of energy consumption required for the vital data processing. The comparisons showed that LPC1768 is the most power-efficient candidate, so then we designed and implemented a prototype vital sensor node using LPC1768.
{"title":"Design of wireless waist-mounted vital sensor node for athletes — Performance evaluation of microcontrollers suitable for signal processing of ECG signal at waist part","authors":"Shin Okamoto, T. Tsujioka, S. Hara, Hajime Nakamura, Takashi Kawabata, Kenji Watanabe, M. Ise, Noa Arime, H. Okuhata","doi":"10.1109/BIOWIRELESS.2014.6827741","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827741","url":null,"abstract":"In recent years, the vital data of athletes during training and game have been used to plan effective training menus and avoid injuries and diseases, where a vital sensor node is often mounted at the chest position of an athlete. One of the main problems is that a tri-axis accelerometer sensor should be mounted at a different position such as rear waist for accurate energy expenditure (EE) estimation whereas an electro-cardio-gram (ECG) sensor should be separately mounted at a chest position for accurate heart rate (HR) estimation. In this paper, we newly design a wireless waist-mounted vital sensor node for both EE and HR estimations. First of all, to select a microcontroller suitable for the data processing in the vital sensor node, we numerically compared three microcontrollers in terms of energy consumption required for the vital data processing. The comparisons showed that LPC1768 is the most power-efficient candidate, so then we designed and implemented a prototype vital sensor node using LPC1768.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131814152","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 : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827734
Lingyun Ren, Y. Koo, Yazhou Wang, G. To, M. Mahfouz, A. Fathy
UWB Doppler radar is capable of monitoring vital signs of human beings in a non-contact way by detecting the changes in the time of flight of narrow pulses emitted by the radar and reflected from the human chest. However, the received signal may be corrupted when there is a random motion if handheld UWB radar is used, especially when the amplitude of motion is higher than that of the thoracic motion. In this paper, a random motion cancellation method using an embedded system is proposed for recovering the real vital signs similar to image stabilization in optical cameras. The proposed embedded system is attached to the receiving antenna and used to collect the data of motion acceleration. The correlation between the data collected by the UWB system and embedded system is analyzed and a Finite Impulse Response (FIR) model considering the time delay between these two systems is developed as well. Experiments show that the respiration rate of a subject can be accurately recovered by motion cancellation method even in the presence of a high-amplitude motion of the receiver.
{"title":"High-amplitude motion cancellation method for handheld UWB Doppler radar","authors":"Lingyun Ren, Y. Koo, Yazhou Wang, G. To, M. Mahfouz, A. Fathy","doi":"10.1109/BIOWIRELESS.2014.6827734","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827734","url":null,"abstract":"UWB Doppler radar is capable of monitoring vital signs of human beings in a non-contact way by detecting the changes in the time of flight of narrow pulses emitted by the radar and reflected from the human chest. However, the received signal may be corrupted when there is a random motion if handheld UWB radar is used, especially when the amplitude of motion is higher than that of the thoracic motion. In this paper, a random motion cancellation method using an embedded system is proposed for recovering the real vital signs similar to image stabilization in optical cameras. The proposed embedded system is attached to the receiving antenna and used to collect the data of motion acceleration. The correlation between the data collected by the UWB system and embedded system is analyzed and a Finite Impulse Response (FIR) model considering the time delay between these two systems is developed as well. Experiments show that the respiration rate of a subject can be accurately recovered by motion cancellation method even in the presence of a high-amplitude motion of the receiver.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"713 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132508265","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 : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827728
U. Schwerthoeffer, Christopher Warter, R. Weigel, D. Kissinger
A highly sensitive biosensor to detect small variations of glucose concentrations in water is proposed. The sensor structure is based on a planar half-wavelength (lambda/2) microstrip line (MSL) resonator with a microflu-idic container placed on top. The interaction between the electric field and the milliliter range water-glucose solutions under test can be observed measuring the phase shift of the S-parameter from 3.95 to 4.10 GHz. Combining the microwave detection and the microfluidic network, a time efficient and low cost architecture is presented. With this technique, a very sensitive water-glucose concentration of less than 50 mg/dl can be separated.
{"title":"A microstrip resonant biosensor for aqueous glucose detection in microfluidic medical applications","authors":"U. Schwerthoeffer, Christopher Warter, R. Weigel, D. Kissinger","doi":"10.1109/BIOWIRELESS.2014.6827728","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827728","url":null,"abstract":"A highly sensitive biosensor to detect small variations of glucose concentrations in water is proposed. The sensor structure is based on a planar half-wavelength (lambda/2) microstrip line (MSL) resonator with a microflu-idic container placed on top. The interaction between the electric field and the milliliter range water-glucose solutions under test can be observed measuring the phase shift of the S-parameter from 3.95 to 4.10 GHz. Combining the microwave detection and the microfluidic network, a time efficient and low cost architecture is presented. With this technique, a very sensitive water-glucose concentration of less than 50 mg/dl can be separated.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133556817","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 : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827742
C. Kaynak, M. Kaynak, M. Wietstruck, S. Marschmeyer, P. Kulse, K. Schulz, H. Silz, A. Kruger, R. Barth, K. Schmalz, B. Tillack
In this paper, modeling and characterization of BiCMOS embedded microfluidic platform for biosensing applications is presented. The novel process integration scheme with two bonded wafers provides microchannels, accessing to the inlets and the outlets as well as the mm-wave sensor easily. The developed microfluidic platform provides very flexible size of microchannels in BiCMOS chip and it is able to bring the fluid very close to the sensor. A fully integrated 120 GHz dielectric sensor has been used for the demonstration of the platform. The high reproducibility, micron size, high throughput and low-cost process make the presented BiCMOS integrated microfluidic channels as a key platform for bio and THz sensing applications.
{"title":"Modeling and characterization of BiCMOS embedded microfluidic platform for biosensing applications","authors":"C. Kaynak, M. Kaynak, M. Wietstruck, S. Marschmeyer, P. Kulse, K. Schulz, H. Silz, A. Kruger, R. Barth, K. Schmalz, B. Tillack","doi":"10.1109/BIOWIRELESS.2014.6827742","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827742","url":null,"abstract":"In this paper, modeling and characterization of BiCMOS embedded microfluidic platform for biosensing applications is presented. The novel process integration scheme with two bonded wafers provides microchannels, accessing to the inlets and the outlets as well as the mm-wave sensor easily. The developed microfluidic platform provides very flexible size of microchannels in BiCMOS chip and it is able to bring the fluid very close to the sensor. A fully integrated 120 GHz dielectric sensor has been used for the demonstration of the platform. The high reproducibility, micron size, high throughput and low-cost process make the presented BiCMOS integrated microfluidic channels as a key platform for bio and THz sensing applications.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121074989","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 : 2014-06-09DOI: 10.1109/BIOWIRELESS.2014.6827729
S. Liu, I. Ocket, B. Nauwelaers, D. Schreurs
We present in this paper an inexpensive sensor realized on printed circuit board for broadband dielectric characterization of both liquids and solids. It is based on a CPW-CPW transition and statistical calibration. The specific property of the approach is that no assumption regarding cascading transmission lines with different properties has to be made as permittivity is obtained by a single-tier calibration. The sensor is validated by measurements of methanol and PDMS.
{"title":"An inexpensive backside-sensing coplanar waveguide sensor for characterization of liquids and solids up to 40 GHz","authors":"S. Liu, I. Ocket, B. Nauwelaers, D. Schreurs","doi":"10.1109/BIOWIRELESS.2014.6827729","DOIUrl":"https://doi.org/10.1109/BIOWIRELESS.2014.6827729","url":null,"abstract":"We present in this paper an inexpensive sensor realized on printed circuit board for broadband dielectric characterization of both liquids and solids. It is based on a CPW-CPW transition and statistical calibration. The specific property of the approach is that no assumption regarding cascading transmission lines with different properties has to be made as permittivity is obtained by a single-tier calibration. The sensor is validated by measurements of methanol and PDMS.","PeriodicalId":341652,"journal":{"name":"2014 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS)","volume":"213 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133067091","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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