Pub Date : 2010-03-18DOI: 10.1109/SECON.2010.5453921
C. Baber, Yaohang Li
Recently, sensors and sensor networks are receiving much attention due to the growing number of small, inexpensive sensor nodes with advanced sensing capabilities. These “smart” sensors enable sensor networks and Sensor Webs to better monitor environmental variables and to share the resulting sensor data in real-time. The advancement in sensor technology also poses new challenges due to the increased number of distributed sensors, the increased amount of heterogeneous sensor data, and the sensor services that must interoperate in this dynamic environment with bandwidth, power, time, and computational power constraints. In this work, we present an approach to using the workflow technology on a service-oriented information framework to provide state-of-the-art mechanisms to access, integrate, analyze, and visualize distributed sensor data. We demonstrate the effectiveness and feasibility of this information framework on implementing weather station sensor services based on the Open Geospatial Consortium (OGC) Sensor Observation Service (SOS) standard.
{"title":"Sensor information framework: Using workflow to integrate distributed sensor services","authors":"C. Baber, Yaohang Li","doi":"10.1109/SECON.2010.5453921","DOIUrl":"https://doi.org/10.1109/SECON.2010.5453921","url":null,"abstract":"Recently, sensors and sensor networks are receiving much attention due to the growing number of small, inexpensive sensor nodes with advanced sensing capabilities. These “smart” sensors enable sensor networks and Sensor Webs to better monitor environmental variables and to share the resulting sensor data in real-time. The advancement in sensor technology also poses new challenges due to the increased number of distributed sensors, the increased amount of heterogeneous sensor data, and the sensor services that must interoperate in this dynamic environment with bandwidth, power, time, and computational power constraints. In this work, we present an approach to using the workflow technology on a service-oriented information framework to provide state-of-the-art mechanisms to access, integrate, analyze, and visualize distributed sensor data. We demonstrate the effectiveness and feasibility of this information framework on implementing weather station sensor services based on the Open Geospatial Consortium (OGC) Sensor Observation Service (SOS) standard.","PeriodicalId":286940,"journal":{"name":"Proceedings of the IEEE SoutheastCon 2010 (SoutheastCon)","volume":"5 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113976100","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 : 2010-03-18DOI: 10.1109/SECON.2010.5453830
Amitangshu Pal, A. Nasipuri
In this paper we consider anycast routing for multi-gateway wireless mesh networks to maximize the overall quality of communications. For such networks, anycasting provides an effective mechanism to reduce problems due to congestion and interfence by appropriate selection of gateways, particularly at heavy traffic conditions. However, as proved in this paper, the optimal gateway selection problem is NP-hard. Hence, we propose a heuristic for route selection that tries to perform gateway and route selection to minimize interference. Simulation results show that our proposed anycasting scheme performs better than other well known anycasting protocols.
{"title":"A quality aware anycast routing protocol for wireless mesh networks","authors":"Amitangshu Pal, A. Nasipuri","doi":"10.1109/SECON.2010.5453830","DOIUrl":"https://doi.org/10.1109/SECON.2010.5453830","url":null,"abstract":"In this paper we consider anycast routing for multi-gateway wireless mesh networks to maximize the overall quality of communications. For such networks, anycasting provides an effective mechanism to reduce problems due to congestion and interfence by appropriate selection of gateways, particularly at heavy traffic conditions. However, as proved in this paper, the optimal gateway selection problem is NP-hard. Hence, we propose a heuristic for route selection that tries to perform gateway and route selection to minimize interference. Simulation results show that our proposed anycasting scheme performs better than other well known anycasting protocols.","PeriodicalId":286940,"journal":{"name":"Proceedings of the IEEE SoutheastCon 2010 (SoutheastCon)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124443612","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 : 2010-03-18DOI: 10.1109/SECON.2010.5453846
Aaron Hussey, A. Nasipuri, Robert Cox, J. Sorge
Low cost, battery powered wireless sensors have recently become commercially available and have the potential to radically alter traditional methods of equipment monitoring in power plants. This paper reports on a research project co-sponsored by Southern Company and EPRI to demonstrate wireless sensors in a power plant environment. The designed wireless mesh sensor networks studied in this project operated consistently in the 2.4 GHz wireless frequency band within a coal-fired power plant. Transmission distances of approximately 30-50 feet were achieved inside the plant despite concrete and steel obstructions. Communication across multiple levels or floors of the plant was also achieved. The lifetime of the wireless sensor node batteries was adequate for temporary installation (approximately 4-6 months), but can be further increased by reducing data sampling rates, using intelligent local processing techniques, using power harvesting where practical, and taking advantage of advancing battery technologies as they become commercially available. In addition to on-board, embedded sensors that measure light intensity, noise, humidity, temperature and other variables depending on the sensor board, the motes were interfaced to thermocouples for high temperature and accelerometers for rotating machinery vibration measurements.
{"title":"Feasibility of using a wireless mesh sensor network in a coal-fired power plant","authors":"Aaron Hussey, A. Nasipuri, Robert Cox, J. Sorge","doi":"10.1109/SECON.2010.5453846","DOIUrl":"https://doi.org/10.1109/SECON.2010.5453846","url":null,"abstract":"Low cost, battery powered wireless sensors have recently become commercially available and have the potential to radically alter traditional methods of equipment monitoring in power plants. This paper reports on a research project co-sponsored by Southern Company and EPRI to demonstrate wireless sensors in a power plant environment. The designed wireless mesh sensor networks studied in this project operated consistently in the 2.4 GHz wireless frequency band within a coal-fired power plant. Transmission distances of approximately 30-50 feet were achieved inside the plant despite concrete and steel obstructions. Communication across multiple levels or floors of the plant was also achieved. The lifetime of the wireless sensor node batteries was adequate for temporary installation (approximately 4-6 months), but can be further increased by reducing data sampling rates, using intelligent local processing techniques, using power harvesting where practical, and taking advantage of advancing battery technologies as they become commercially available. In addition to on-board, embedded sensors that measure light intensity, noise, humidity, temperature and other variables depending on the sensor board, the motes were interfaced to thermocouples for high temperature and accelerometers for rotating machinery vibration measurements.","PeriodicalId":286940,"journal":{"name":"Proceedings of the IEEE SoutheastCon 2010 (SoutheastCon)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131922122","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 : 2010-03-18DOI: 10.1109/SECON.2010.5453840
A. Willis, Yunfeng Sui
This article describes a novel method for localization of a robot within a 2D scene given a binary map of the scene and a set of range measurements obtained by the robot from some unknown position and orientation. Theoretically, the algorithm is capable of solving all recognized variants of the robot localization problem: tracking, global localization, and kidnapped robot. This is accomplished by treating each set of range measurements as a unique fingerprint, referred to as a range pattern, that is associated with each potential (x, y, θ) pose of the robot. We provide detailed theoretical analysis and an exact solution for the problem when both the range and angle measurements are constrained to come from a discrete set of possible values. Experimental results are obtained using simulated range data taken from synthetic and real-world maps to provide insight on the robustness of our approach and identify situations where the localization solution obtained is not unique. Our solution to this more-constrained problem has low computational complexity and is exact which makes it appropriate for use in real-time robotic navigation applications. Solutions to this problem are of great importance for successful deployment of autonomous robotic vehicles within a-priori known spaces, e.g., buildings, hospitals, etc.
{"title":"Robot 2D self-localization using range pattern matching via the Discrete Fourier Transform","authors":"A. Willis, Yunfeng Sui","doi":"10.1109/SECON.2010.5453840","DOIUrl":"https://doi.org/10.1109/SECON.2010.5453840","url":null,"abstract":"This article describes a novel method for localization of a robot within a 2D scene given a binary map of the scene and a set of range measurements obtained by the robot from some unknown position and orientation. Theoretically, the algorithm is capable of solving all recognized variants of the robot localization problem: tracking, global localization, and kidnapped robot. This is accomplished by treating each set of range measurements as a unique fingerprint, referred to as a range pattern, that is associated with each potential (x, y, θ) pose of the robot. We provide detailed theoretical analysis and an exact solution for the problem when both the range and angle measurements are constrained to come from a discrete set of possible values. Experimental results are obtained using simulated range data taken from synthetic and real-world maps to provide insight on the robustness of our approach and identify situations where the localization solution obtained is not unique. Our solution to this more-constrained problem has low computational complexity and is exact which makes it appropriate for use in real-time robotic navigation applications. Solutions to this problem are of great importance for successful deployment of autonomous robotic vehicles within a-priori known spaces, e.g., buildings, hospitals, etc.","PeriodicalId":286940,"journal":{"name":"Proceedings of the IEEE SoutheastCon 2010 (SoutheastCon)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133834664","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 : 2010-03-18DOI: 10.1109/SECON.2010.5453928
Suraj Swami, Onkar Raut, Ipsita Acharya, J. Conrad
One of the many important parts of any multi-participant quiz game show is the Player Selection System. All participating groups are equipped with a selection button placed in front of them which can be used by them to give a response. The Player Selection System determines the group that gives the first response. Many of these systems used today are wired systems that consume a considerable amount of power. This paper describes an easily installable, expandable robust wireless quiz system using a low battery-powered microcontroller interfaced with a RF wireless transmitter.
{"title":"A wireless quiz system using low power microcontrollers","authors":"Suraj Swami, Onkar Raut, Ipsita Acharya, J. Conrad","doi":"10.1109/SECON.2010.5453928","DOIUrl":"https://doi.org/10.1109/SECON.2010.5453928","url":null,"abstract":"One of the many important parts of any multi-participant quiz game show is the Player Selection System. All participating groups are equipped with a selection button placed in front of them which can be used by them to give a response. The Player Selection System determines the group that gives the first response. Many of these systems used today are wired systems that consume a considerable amount of power. This paper describes an easily installable, expandable robust wireless quiz system using a low battery-powered microcontroller interfaced with a RF wireless transmitter.","PeriodicalId":286940,"journal":{"name":"Proceedings of the IEEE SoutheastCon 2010 (SoutheastCon)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132982890","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 : 2010-03-18DOI: 10.1109/SECON.2010.5453911
Jianhua Liu, Christopher Grant, Donald W. Gallagher
There are many remote airfields that are not connected to the power grid. Providing adequate lighting to these airfields is necessary and challenging. The Federal Aviation Administration (FAA) has sponsored a research project, Remote Airfield Lighting Systems (RALS), through the Center for General Aviation Research (CGAR). The findings from the RALS research specified a light that had low power needs and a color/intensity to meet the requirements for airfield identification and landing. To make these lights more appropriate to wide spread applications, the research team is conducting an exemplary operational test. In this paper, we discuss the new functions added to these lights for the operational test, including both automatically/remotely switching on/off the lights and smart charging of the batteries using solar panels under the control of a microcontroller. In addition, we consider future new functions such as low cost pilot controlled lighting as well as wireless networking for health monitoring and controlling of the lighting system. These new functions can greatly improve the convenience of the usage of RALS while keeping the same low cost.
{"title":"Adding new functions to the remote airfield lighting system","authors":"Jianhua Liu, Christopher Grant, Donald W. Gallagher","doi":"10.1109/SECON.2010.5453911","DOIUrl":"https://doi.org/10.1109/SECON.2010.5453911","url":null,"abstract":"There are many remote airfields that are not connected to the power grid. Providing adequate lighting to these airfields is necessary and challenging. The Federal Aviation Administration (FAA) has sponsored a research project, Remote Airfield Lighting Systems (RALS), through the Center for General Aviation Research (CGAR). The findings from the RALS research specified a light that had low power needs and a color/intensity to meet the requirements for airfield identification and landing. To make these lights more appropriate to wide spread applications, the research team is conducting an exemplary operational test. In this paper, we discuss the new functions added to these lights for the operational test, including both automatically/remotely switching on/off the lights and smart charging of the batteries using solar panels under the control of a microcontroller. In addition, we consider future new functions such as low cost pilot controlled lighting as well as wireless networking for health monitoring and controlling of the lighting system. These new functions can greatly improve the convenience of the usage of RALS while keeping the same low cost.","PeriodicalId":286940,"journal":{"name":"Proceedings of the IEEE SoutheastCon 2010 (SoutheastCon)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128933131","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 : 2010-03-18DOI: 10.1109/SECON.2010.5453933
B. Geltz, J. A. Berlier, J. M. McCollum
Apple's iPod Touch1 is a powerful pocket computing platform, allowing users to play graphics-intensive games, listen to music, browse the World Wide Web, and communicate using email through a Wi-Fi internet connection. Apple's iPhone extends the iPod Touch by providing telephone service and high-speed 3G internet support when a Wi-Fi connection is unavailable. In this work, we investigate utilizing the iPhone and iPod Touch platforms for remote sensor control and data collection. Our example design interfaces a set of switches, a set of light emitting diodes, and a temperature sensor to the iPod Touch through a micro-controller and allows these devices to be controlled and monitored by a remote computer. Through this work, we show that the iPod Touch and iPhone can provide a low-cost, high-performance, and lightweight platform for remote data collection and control.
{"title":"Using the iPhone and iPod Touch for remote sensor control and data acquisition","authors":"B. Geltz, J. A. Berlier, J. M. McCollum","doi":"10.1109/SECON.2010.5453933","DOIUrl":"https://doi.org/10.1109/SECON.2010.5453933","url":null,"abstract":"Apple's iPod Touch1 is a powerful pocket computing platform, allowing users to play graphics-intensive games, listen to music, browse the World Wide Web, and communicate using email through a Wi-Fi internet connection. Apple's iPhone extends the iPod Touch by providing telephone service and high-speed 3G internet support when a Wi-Fi connection is unavailable. In this work, we investigate utilizing the iPhone and iPod Touch platforms for remote sensor control and data collection. Our example design interfaces a set of switches, a set of light emitting diodes, and a temperature sensor to the iPod Touch through a micro-controller and allows these devices to be controlled and monitored by a remote computer. Through this work, we show that the iPod Touch and iPhone can provide a low-cost, high-performance, and lightweight platform for remote data collection and control.","PeriodicalId":286940,"journal":{"name":"Proceedings of the IEEE SoutheastCon 2010 (SoutheastCon)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116826666","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 : 2010-03-18DOI: 10.1109/SECON.2010.5453922
P. Shoghi, Christopher J. Barnwell, R. Mulagada, T. Weldon
A variety of applications such as spectrum monitoring systems and dynamic spectrum access systems motivate the development of on-chip capability to measure the frequency spectrum of the local radio environment. Toward this end, a prototype of a simple single-chip frequency-synthesized spectrum analyzer is presented. The design is targeted for applications where the spectrum analyzer would be a component of a larger complex system. Therefore, a simple architecture is considered in order to minimize chip area and reduce power consumption. Although the proposed spectrum analyzer architecture is uncomplicated, it nevertheless provides useful baseline capability for measurement of the frequency spectrum. A prototype was fabricated in a standard 0.5 micron CMOS process, and measured results are given from 20 to 200 MHz.
{"title":"A prototype single-chip spectrum analyzer with integrated frequency-synthesized tuning","authors":"P. Shoghi, Christopher J. Barnwell, R. Mulagada, T. Weldon","doi":"10.1109/SECON.2010.5453922","DOIUrl":"https://doi.org/10.1109/SECON.2010.5453922","url":null,"abstract":"A variety of applications such as spectrum monitoring systems and dynamic spectrum access systems motivate the development of on-chip capability to measure the frequency spectrum of the local radio environment. Toward this end, a prototype of a simple single-chip frequency-synthesized spectrum analyzer is presented. The design is targeted for applications where the spectrum analyzer would be a component of a larger complex system. Therefore, a simple architecture is considered in order to minimize chip area and reduce power consumption. Although the proposed spectrum analyzer architecture is uncomplicated, it nevertheless provides useful baseline capability for measurement of the frequency spectrum. A prototype was fabricated in a standard 0.5 micron CMOS process, and measured results are given from 20 to 200 MHz.","PeriodicalId":286940,"journal":{"name":"Proceedings of the IEEE SoutheastCon 2010 (SoutheastCon)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116183763","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 : 2010-03-18DOI: 10.1109/SECON.2010.5453832
R. Tashakkori, Christopher D. Sholar
Digital images store large amounts of data and information. This data can be manipulated to some extend without being detected by human eyes. An example of such manipulations is insertion of secret information which is often referred to as information hiding. A successful insertion of a message into an image is more difficult using color images than that of grayscale images. A successful information hiding should result in the extraction of the hidden data from the image with high degree of data integrity. This paper presents an information hiding technique that utilizes lifting schemes to effectively hide information in color images.
{"title":"Message encoding in images using lifting schemes","authors":"R. Tashakkori, Christopher D. Sholar","doi":"10.1109/SECON.2010.5453832","DOIUrl":"https://doi.org/10.1109/SECON.2010.5453832","url":null,"abstract":"Digital images store large amounts of data and information. This data can be manipulated to some extend without being detected by human eyes. An example of such manipulations is insertion of secret information which is often referred to as information hiding. A successful insertion of a message into an image is more difficult using color images than that of grayscale images. A successful information hiding should result in the extraction of the hidden data from the image with high degree of data integrity. This paper presents an information hiding technique that utilizes lifting schemes to effectively hide information in color images.","PeriodicalId":286940,"journal":{"name":"Proceedings of the IEEE SoutheastCon 2010 (SoutheastCon)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124501099","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 : 2010-03-18DOI: 10.1109/SECON.2010.5453930
Zhenyu Qi, A. C. Cabe, Robert T. Jones, M. Stan
A CORDIC processor with three computation modes is designed. The design targets low power applications. A novel fine grain clock gating scheme is employed to reduce power. The design is mapped to two technology nodes, i.e., 350 nm and 65 nm, using a script-based, parameterizable ASIC/SoC flow that can be easily adapted for different designs and technologies for fast concept-to-silicon mapping. Power numbers at both technology nodes are reported for the CORDIC design. The contribution of the paper includes both the actual design and the design flow.
{"title":"CORDIC implementation with parameterizable ASIC/SoC flow","authors":"Zhenyu Qi, A. C. Cabe, Robert T. Jones, M. Stan","doi":"10.1109/SECON.2010.5453930","DOIUrl":"https://doi.org/10.1109/SECON.2010.5453930","url":null,"abstract":"A CORDIC processor with three computation modes is designed. The design targets low power applications. A novel fine grain clock gating scheme is employed to reduce power. The design is mapped to two technology nodes, i.e., 350 nm and 65 nm, using a script-based, parameterizable ASIC/SoC flow that can be easily adapted for different designs and technologies for fast concept-to-silicon mapping. Power numbers at both technology nodes are reported for the CORDIC design. The contribution of the paper includes both the actual design and the design flow.","PeriodicalId":286940,"journal":{"name":"Proceedings of the IEEE SoutheastCon 2010 (SoutheastCon)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129506074","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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