Pub Date : 2011-05-03DOI: 10.1109/SARNOF.2011.5876453
D. Helman, E. Addeo, D. Walters
The purpose of this paper is to discuss the widespread changes impacting consumers and business in the e-Landscape, with a focus upon the idea that market pull is resulting in demand for m-Health, which encompasses mobile health related devices and applications that enable consumers to manage healthcare anywhere, anytime and with security. The e-Landscape model is reviewed and implementation issues are broached by exploring the notions of the value proposition and value chain networks. The value proposition is regarded as a central organizing principle around which a business can be configured. This enables managers to align changing customer needs, resources, internal relationships and external partnerships, to deliver the brand promise to the marketplace.
{"title":"Ubiquity and integration in m-Health: Implications for brand management","authors":"D. Helman, E. Addeo, D. Walters","doi":"10.1109/SARNOF.2011.5876453","DOIUrl":"https://doi.org/10.1109/SARNOF.2011.5876453","url":null,"abstract":"The purpose of this paper is to discuss the widespread changes impacting consumers and business in the e-Landscape, with a focus upon the idea that market pull is resulting in demand for m-Health, which encompasses mobile health related devices and applications that enable consumers to manage healthcare anywhere, anytime and with security. The e-Landscape model is reviewed and implementation issues are broached by exploring the notions of the value proposition and value chain networks. The value proposition is regarded as a central organizing principle around which a business can be configured. This enables managers to align changing customer needs, resources, internal relationships and external partnerships, to deliver the brand promise to the marketplace.","PeriodicalId":339596,"journal":{"name":"34th IEEE Sarnoff Symposium","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123220989","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 : 2011-05-03DOI: 10.1109/SARNOF.2011.5876476
Kanghee Lee, H. Kwon, Yanwu Ding, Y. Ibdah, Zuojun Wang, Yu Bi
This paper presents node geometry and broadband jamming in noncooperative wireless relay networks under the received power constraint. Diagonal relay amplifying matrices based on minimum mean square error (MMSE) criteria corresponding to node geometry and broadband jamming in wireless networks under the received power constraint are derived. All relay nodes are assumed not to communicate with their received signals for no cooperation. N relay nodes and one-source-one-destination node pair for amplify-and-forward (AF) strategy are employed. Bit error rate of the wireless relay network using the derived diagonal relay amplifying matrices is presented.
{"title":"Node geometry and broadband jamming in noncooperative relay networks under received power constraint","authors":"Kanghee Lee, H. Kwon, Yanwu Ding, Y. Ibdah, Zuojun Wang, Yu Bi","doi":"10.1109/SARNOF.2011.5876476","DOIUrl":"https://doi.org/10.1109/SARNOF.2011.5876476","url":null,"abstract":"This paper presents node geometry and broadband jamming in noncooperative wireless relay networks under the received power constraint. Diagonal relay amplifying matrices based on minimum mean square error (MMSE) criteria corresponding to node geometry and broadband jamming in wireless networks under the received power constraint are derived. All relay nodes are assumed not to communicate with their received signals for no cooperation. N relay nodes and one-source-one-destination node pair for amplify-and-forward (AF) strategy are employed. Bit error rate of the wireless relay network using the derived diagonal relay amplifying matrices is presented.","PeriodicalId":339596,"journal":{"name":"34th IEEE Sarnoff Symposium","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128236070","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 : 2011-05-03DOI: 10.1109/SARNOF.2011.5876474
Sanqing Hu, Yu-dong Yao, A. Sheikh, M. A. Haleem
The tagged user approach (TUA) is shown to be an effective method based on queueing theories to analyze random multiple access systems and avoid the high computational complexities of Markovian analysis. In this paper, we investigate using the TUA to analyze a finite-user finite-buffer slotted Aloha system considering AWGN and frequency selective fading effects respectively. The theoretical derivations based on TUA are presented in this paper and computer simulations are performed to evaluate the TUA accuracy. Performance results of system throughput, packet blocking probability, queue length, packet waiting time and response time are presented.
{"title":"Tagged user approach for finite-user finite-buffer S-Aloha analysis in AWGN and frequency selective fading channels","authors":"Sanqing Hu, Yu-dong Yao, A. Sheikh, M. A. Haleem","doi":"10.1109/SARNOF.2011.5876474","DOIUrl":"https://doi.org/10.1109/SARNOF.2011.5876474","url":null,"abstract":"The tagged user approach (TUA) is shown to be an effective method based on queueing theories to analyze random multiple access systems and avoid the high computational complexities of Markovian analysis. In this paper, we investigate using the TUA to analyze a finite-user finite-buffer slotted Aloha system considering AWGN and frequency selective fading effects respectively. The theoretical derivations based on TUA are presented in this paper and computer simulations are performed to evaluate the TUA accuracy. Performance results of system throughput, packet blocking probability, queue length, packet waiting time and response time are presented.","PeriodicalId":339596,"journal":{"name":"34th IEEE Sarnoff Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130849463","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 : 2011-05-03DOI: 10.1109/SARNOF.2011.5876441
Mahsa Shafiee, A. J. Jahromi, H. Nia, Negin Sokhandan
In this paper we focus on the problem of code assignment to cognitive users in a synchronous underlay network using Code Division Multiple Access (CDMA) scheme. No knowledge of the spreading codes used by the primary CDMA network is available to the cooperative secondary users a priori, other than the spreading factor. An evolutionary algorithm of relatively low complexity order is proposed based on Ant Colony Optimization (ACO) for assigning spreading codes to secondary users such that the mutual interference between existing secondary and primary users is minimized. This is accomplished at the secondary fusion center by minimizing the mean square cross-correlation between the candidate codes and the matrix which includes all independently received signals by the cooperative secondary users. Simulation results show that performance of the ACO-based method can converge to the optimal interference minimizing code assignment method while the complexity order is significantly reduced.
{"title":"Ant Colony Optimization approach to interference minimizing code assignment in cognitive CDMA networks","authors":"Mahsa Shafiee, A. J. Jahromi, H. Nia, Negin Sokhandan","doi":"10.1109/SARNOF.2011.5876441","DOIUrl":"https://doi.org/10.1109/SARNOF.2011.5876441","url":null,"abstract":"In this paper we focus on the problem of code assignment to cognitive users in a synchronous underlay network using Code Division Multiple Access (CDMA) scheme. No knowledge of the spreading codes used by the primary CDMA network is available to the cooperative secondary users a priori, other than the spreading factor. An evolutionary algorithm of relatively low complexity order is proposed based on Ant Colony Optimization (ACO) for assigning spreading codes to secondary users such that the mutual interference between existing secondary and primary users is minimized. This is accomplished at the secondary fusion center by minimizing the mean square cross-correlation between the candidate codes and the matrix which includes all independently received signals by the cooperative secondary users. Simulation results show that performance of the ACO-based method can converge to the optimal interference minimizing code assignment method while the complexity order is significantly reduced.","PeriodicalId":339596,"journal":{"name":"34th IEEE Sarnoff Symposium","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127678584","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 : 2011-05-03DOI: 10.1109/SARNOF.2011.5876468
Henrik Klessig, A. Fehske, G. Fettweis
Energy efficiency considerations recently gained attention due to ecological aspects, that is to say lowering CO2 emissions and reducing energy consumption. Furthermore, it is important to assess energy efficiency improvements from an operator's point of view, since energy costs are increasing and providing ubiquitous high speed mobile access may scale up the operators' operational expenditure. One of two promising approaches to enhance a network's operation regarding energy efficiency is to utilize smaller micro cells within one large macro cell. Another approach is to regard macro base stations as coverage providers for areas in between micro cells, while reducing their maximum transmit powers to a minimum. In this paper we investigate on the energy efficiency of a heterogeneous OFDM-based mobile network in the downlink taking into account the co-channel interference based on varying traffic demand per area. Furthermore, we carry out an assessment of potential energy savings of the two approaches mentioned above. For a sufficiently large traffic demand, increasing deployment densitiy through additional micro sites may maximize a network's energy efficiency. In that case the network operates at a load of less than 50 %. Moreover, a further gain of energy efficiency of about 20 % can be achieved due to macro site transmit power reduction while still providing coverage.
{"title":"Energy efficiency gains in interference-limited heterogeneous cellular mobile radio networks with random micro site deployment","authors":"Henrik Klessig, A. Fehske, G. Fettweis","doi":"10.1109/SARNOF.2011.5876468","DOIUrl":"https://doi.org/10.1109/SARNOF.2011.5876468","url":null,"abstract":"Energy efficiency considerations recently gained attention due to ecological aspects, that is to say lowering CO2 emissions and reducing energy consumption. Furthermore, it is important to assess energy efficiency improvements from an operator's point of view, since energy costs are increasing and providing ubiquitous high speed mobile access may scale up the operators' operational expenditure. One of two promising approaches to enhance a network's operation regarding energy efficiency is to utilize smaller micro cells within one large macro cell. Another approach is to regard macro base stations as coverage providers for areas in between micro cells, while reducing their maximum transmit powers to a minimum. In this paper we investigate on the energy efficiency of a heterogeneous OFDM-based mobile network in the downlink taking into account the co-channel interference based on varying traffic demand per area. Furthermore, we carry out an assessment of potential energy savings of the two approaches mentioned above. For a sufficiently large traffic demand, increasing deployment densitiy through additional micro sites may maximize a network's energy efficiency. In that case the network operates at a load of less than 50 %. Moreover, a further gain of energy efficiency of about 20 % can be achieved due to macro site transmit power reduction while still providing coverage.","PeriodicalId":339596,"journal":{"name":"34th IEEE Sarnoff Symposium","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129184674","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 : 2011-05-03DOI: 10.1109/SARNOF.2011.5876437
Z. Dong, R. Rojas-Cessa
Buffered Clos-network switch, also referred as memory-memory-memory (MMM) Clos-network switch, is an alternative to single-stage switches to implement large-scale packet switches. In this paper, we unveil the head-of-line blocking problem of MMM Clos-network switches with switch modules implemented by buffered crossbars, which causes performance degradation. We propose a three-stage buffered Clos-network switch with per-output flow queues in the switch modules at the first two stages to avoid head-of-line blocking. The proposed switch, called the MMeM switch, achieves higher performance than an MMM buffered Clos-network packet switch. We show the performance improvement of the proposed MMeM switch under different traffic patterns.
{"title":"Non-blocking memory-memory-memory Clos-network packet switch","authors":"Z. Dong, R. Rojas-Cessa","doi":"10.1109/SARNOF.2011.5876437","DOIUrl":"https://doi.org/10.1109/SARNOF.2011.5876437","url":null,"abstract":"Buffered Clos-network switch, also referred as memory-memory-memory (MMM) Clos-network switch, is an alternative to single-stage switches to implement large-scale packet switches. In this paper, we unveil the head-of-line blocking problem of MMM Clos-network switches with switch modules implemented by buffered crossbars, which causes performance degradation. We propose a three-stage buffered Clos-network switch with per-output flow queues in the switch modules at the first two stages to avoid head-of-line blocking. The proposed switch, called the MMeM switch, achieves higher performance than an MMM buffered Clos-network packet switch. We show the performance improvement of the proposed MMeM switch under different traffic patterns.","PeriodicalId":339596,"journal":{"name":"34th IEEE Sarnoff Symposium","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129349123","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 : 2011-05-03DOI: 10.1109/SARNOF.2011.5876434
J. Sucec, L. Wong, M. Fecko, M. Kaplan, D. Shur, S. Samtani
Efficient congestion detection represents an unsolved challenge for tactical networks. This paper presents an edge-based packet probing technique to detect congestion that incurs modest control overhead. The approach presented, herein, is “Differential Performance Packet Probing” (DP3) and leverages the differential treatment of packets at the queues of routers and radios. By measuring loss rates across different types of probe packets, DP3 can detect congestion events and, furthermore, distinguish packet losses due to path congestion events from losses due to link outage events. Extensive results are reported for lab experiments of the DP3 concept in an emulated wireless network environment and in a wired Cisco environment. Detailed statistical analysis of the tradeoff between reliability and agility of the DP3 congestion indicator is also described.
{"title":"Congestion awareness in tactical wireless networks: Discerning congestion-induced losses from wireless link effects","authors":"J. Sucec, L. Wong, M. Fecko, M. Kaplan, D. Shur, S. Samtani","doi":"10.1109/SARNOF.2011.5876434","DOIUrl":"https://doi.org/10.1109/SARNOF.2011.5876434","url":null,"abstract":"Efficient congestion detection represents an unsolved challenge for tactical networks. This paper presents an edge-based packet probing technique to detect congestion that incurs modest control overhead. The approach presented, herein, is “Differential Performance Packet Probing” (DP3) and leverages the differential treatment of packets at the queues of routers and radios. By measuring loss rates across different types of probe packets, DP3 can detect congestion events and, furthermore, distinguish packet losses due to path congestion events from losses due to link outage events. Extensive results are reported for lab experiments of the DP3 concept in an emulated wireless network environment and in a wired Cisco environment. Detailed statistical analysis of the tradeoff between reliability and agility of the DP3 congestion indicator is also described.","PeriodicalId":339596,"journal":{"name":"34th IEEE Sarnoff Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129116964","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 : 2011-05-03DOI: 10.1109/SARNOF.2011.5876481
S. Alam, O. Odejide, O. Olabiyi, A. Annamalai
A simple measurement to analyze the signal detector's performance is desirable. Although, receiver operating characteristic (ROC) curve has long been used for characterizing system performance, area under the ROC curve (AUC) measurement provides meaningful insights of the system performance. Signal detector's performance can be characterized simply by average AUC, since average AUC varies from 0.5 to 1. In the worst case scenario, the detector's performance can be no less than 0.5 and the best can be 1. In this paper simple expression of average AUC is developed based on the kth order derivative of the moment generating function (MGF) over the generalized fading channels for no-diversity and several diversity cases. Simplified expressions are derived for maximum ratio combing (MRC), square-law combing (SLC) diversity schemes and a simple CDF based single integral expression is developed for selection combining (SC) technique. Examples are given considering the Nakagami-m and Rice channels. Our approaches are simple and analytical results are even shown using the half integer bandwidth-time product (u) and the half integer Nakagami-m fading index. Different factors affecting energy sensing has been analyzed, which can be readily used for other applications such as cognitive radio.
{"title":"Further results on area under the ROC curve of energy detectors over generalized fading channels","authors":"S. Alam, O. Odejide, O. Olabiyi, A. Annamalai","doi":"10.1109/SARNOF.2011.5876481","DOIUrl":"https://doi.org/10.1109/SARNOF.2011.5876481","url":null,"abstract":"A simple measurement to analyze the signal detector's performance is desirable. Although, receiver operating characteristic (ROC) curve has long been used for characterizing system performance, area under the ROC curve (AUC) measurement provides meaningful insights of the system performance. Signal detector's performance can be characterized simply by average AUC, since average AUC varies from 0.5 to 1. In the worst case scenario, the detector's performance can be no less than 0.5 and the best can be 1. In this paper simple expression of average AUC is developed based on the kth order derivative of the moment generating function (MGF) over the generalized fading channels for no-diversity and several diversity cases. Simplified expressions are derived for maximum ratio combing (MRC), square-law combing (SLC) diversity schemes and a simple CDF based single integral expression is developed for selection combining (SC) technique. Examples are given considering the Nakagami-m and Rice channels. Our approaches are simple and analytical results are even shown using the half integer bandwidth-time product (u) and the half integer Nakagami-m fading index. Different factors affecting energy sensing has been analyzed, which can be readily used for other applications such as cognitive radio.","PeriodicalId":339596,"journal":{"name":"34th IEEE Sarnoff Symposium","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126645621","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 : 2011-05-03DOI: 10.1109/SARNOF.2011.5876464
M. Coupechoux, J. Kélif
The uplink power control procedure in Long Term Evolution (LTE) cellular networks is made of an open-loop part and a closed loop part. In this paper, we focus on the former and study the compensation factor of the related Fractional Power Control (FPC) scheme. In particular, we propose a first analytical approach in order to derive approximate equations for the Signal to Interference plus Noise Ratio (SINR) at a given distance of the eNode-B, the average SINR, and the average cell spectral efficiency. This method avoids extensive and time-consuming simulations. From derived expressions, we are able to find the optimal compensation factor, and to study the impact of various network and environment parameters on the system performance.
{"title":"How to set the fractional power control compensation factor in LTE ?","authors":"M. Coupechoux, J. Kélif","doi":"10.1109/SARNOF.2011.5876464","DOIUrl":"https://doi.org/10.1109/SARNOF.2011.5876464","url":null,"abstract":"The uplink power control procedure in Long Term Evolution (LTE) cellular networks is made of an open-loop part and a closed loop part. In this paper, we focus on the former and study the compensation factor of the related Fractional Power Control (FPC) scheme. In particular, we propose a first analytical approach in order to derive approximate equations for the Signal to Interference plus Noise Ratio (SINR) at a given distance of the eNode-B, the average SINR, and the average cell spectral efficiency. This method avoids extensive and time-consuming simulations. From derived expressions, we are able to find the optimal compensation factor, and to study the impact of various network and environment parameters on the system performance.","PeriodicalId":339596,"journal":{"name":"34th IEEE Sarnoff Symposium","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123443212","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 : 2011-05-03DOI: 10.1109/SARNOF.2011.5876465
Mattia Minelli, M. Coupechoux, J. Kélif, M. Ma, P. Godlewski
This paper proposes a study on the performance of multi-hop relays networks. We demonstrate the importance of the relays for coverage and capacity enhancement and study how the number of relays and their position inside the cell impact the performance, and how an efficient relay location scheme can guarantee better performance with less relays per cell. Further we give an estimation of the amount of power per square meter on the ground when relays are used, with respect to traditional network, showing the fundamental role of relays for green networking. We consider the downlink of an LTE-Advanced network, in which all the User Equipments (UE) are supposed to be attached to the eNode-B (eNB) or Relay Node (RN) from which they receive more power. Numerical results are obtained through Monte-Carlo simulations and the performance measures are represented by the average effective Signal to Interference and Noise Ratio (SINR) and the average spectral efficiency.
{"title":"Relays-enhanced LTE-Advanced networks performance studies","authors":"Mattia Minelli, M. Coupechoux, J. Kélif, M. Ma, P. Godlewski","doi":"10.1109/SARNOF.2011.5876465","DOIUrl":"https://doi.org/10.1109/SARNOF.2011.5876465","url":null,"abstract":"This paper proposes a study on the performance of multi-hop relays networks. We demonstrate the importance of the relays for coverage and capacity enhancement and study how the number of relays and their position inside the cell impact the performance, and how an efficient relay location scheme can guarantee better performance with less relays per cell. Further we give an estimation of the amount of power per square meter on the ground when relays are used, with respect to traditional network, showing the fundamental role of relays for green networking. We consider the downlink of an LTE-Advanced network, in which all the User Equipments (UE) are supposed to be attached to the eNode-B (eNB) or Relay Node (RN) from which they receive more power. Numerical results are obtained through Monte-Carlo simulations and the performance measures are represented by the average effective Signal to Interference and Noise Ratio (SINR) and the average spectral efficiency.","PeriodicalId":339596,"journal":{"name":"34th IEEE Sarnoff Symposium","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131802081","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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