Pub Date : 2008-07-16DOI: 10.1109/NAECON.2008.4806518
M. A. Patterson
This research compares the results of five multispectral transforms applied to images of carbonized scrolls to determine which transform creates the best readable image. These transforms are vector quantization with principal components analysis, noise subspace projection, interference-and-noise-adjusted principal components analysis, convex cone analysis, and penalized discriminant analysis with principal components analysis. One approach to interference-and-noise-adjusted principal components analysis called signal-to-interference-plus-noise-ratio-based principal components analysis had the highest readability score according to a subjective judgment of 30 randomly selected individuals. However, convex cone analysis created a resultant image with the highest signal-to-noise ratio.
{"title":"A Comparison of Multispectral Transforms","authors":"M. A. Patterson","doi":"10.1109/NAECON.2008.4806518","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806518","url":null,"abstract":"This research compares the results of five multispectral transforms applied to images of carbonized scrolls to determine which transform creates the best readable image. These transforms are vector quantization with principal components analysis, noise subspace projection, interference-and-noise-adjusted principal components analysis, convex cone analysis, and penalized discriminant analysis with principal components analysis. One approach to interference-and-noise-adjusted principal components analysis called signal-to-interference-plus-noise-ratio-based principal components analysis had the highest readability score according to a subjective judgment of 30 randomly selected individuals. However, convex cone analysis created a resultant image with the highest signal-to-noise ratio.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"210 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121216518","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 : 2008-07-16DOI: 10.1109/NAECON.2008.4806556
Erik Blasch, A. Rice, Chun Yang, I. Kadar
Tracking performance is a function of data quality, tracker type, and target maneuverability. Many contemporary tracking methods are useful for various operating conditions. To determine nonlinear tracking performance independent of the scenario, we wish to explore metrics that highlight the tracker capability. With the emerging relative track metrics, as opposed to root-mean-square error (RMS) calculations, we explore the Averaged Normalized Estimation Error Squared (ANESS) and Non Credibility Index (NCI) to determine tracker quality independent of the data. This paper demonstrates the usefulness of relative metrics to determine a model mismatch, or more specifically a bias in the model, using the probabilistic data association filter, the unscented Kalman filter, and the particle filter.
{"title":"Relative Track Metrics to Determine Model Mismatch","authors":"Erik Blasch, A. Rice, Chun Yang, I. Kadar","doi":"10.1109/NAECON.2008.4806556","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806556","url":null,"abstract":"Tracking performance is a function of data quality, tracker type, and target maneuverability. Many contemporary tracking methods are useful for various operating conditions. To determine nonlinear tracking performance independent of the scenario, we wish to explore metrics that highlight the tracker capability. With the emerging relative track metrics, as opposed to root-mean-square error (RMS) calculations, we explore the Averaged Normalized Estimation Error Squared (ANESS) and Non Credibility Index (NCI) to determine tracker quality independent of the data. This paper demonstrates the usefulness of relative metrics to determine a model mismatch, or more specifically a bias in the model, using the probabilistic data association filter, the unscented Kalman filter, and the particle filter.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114929433","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 : 2008-07-16DOI: 10.1109/NAECON.2008.4806508
K. Jones
This thought experiment discusses concepts that should be considered when performing systems integration and systems engineering efforts applicable to integrating standalone avionic and electronic cognition systems to attain complex adaptive communication and collaboration capabilities. The concepts are artificial sensory and cognition systems; biomimetics; engineering and systems engineering memes; and informational silos and their relationships to memes and memes integration problems. Put simply, from a problematic perspective, one problem is the following: Design and development teams oftentimes encounter technical challenges when attempting to integrate standalone, biomimetically-based, communication and collaboration cognition systems that were not designed to be integrated with other systems. A second problem is the following: Design and development teams oftentimes integrate systems based only on their machine-centered designs and functions and without consideration of human factor elements such as informational silos, memes and corporate cultures. A third problem is the following: Teams might encounter other systems integration and systems engineering problems and roadblocks too such as proprietary information; perceptual lenses; blind spots; and interdisciplinary and professional prejudgments, parochialisms and stereotypes. The latter can also interfere with efforts to integrate standalone systems (developed by different companies) and can also interfere with the systems being capable of providing individually attained information into command and control networks within required response times. Use of sociological processes related to holistic systems engineering, systems thinking and non-traditional professionals can be used to solve people-rated problems, to categorized unknowns for mitigating risks, and to then perform systems integration regarding communication and collaboration cognition systems.
{"title":"Communication And Collaboration Cognition Systems: A Sociological Process For Integrating Standalone Technologies With The Global Information Grid","authors":"K. Jones","doi":"10.1109/NAECON.2008.4806508","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806508","url":null,"abstract":"This thought experiment discusses concepts that should be considered when performing systems integration and systems engineering efforts applicable to integrating standalone avionic and electronic cognition systems to attain complex adaptive communication and collaboration capabilities. The concepts are artificial sensory and cognition systems; biomimetics; engineering and systems engineering memes; and informational silos and their relationships to memes and memes integration problems. Put simply, from a problematic perspective, one problem is the following: Design and development teams oftentimes encounter technical challenges when attempting to integrate standalone, biomimetically-based, communication and collaboration cognition systems that were not designed to be integrated with other systems. A second problem is the following: Design and development teams oftentimes integrate systems based only on their machine-centered designs and functions and without consideration of human factor elements such as informational silos, memes and corporate cultures. A third problem is the following: Teams might encounter other systems integration and systems engineering problems and roadblocks too such as proprietary information; perceptual lenses; blind spots; and interdisciplinary and professional prejudgments, parochialisms and stereotypes. The latter can also interfere with efforts to integrate standalone systems (developed by different companies) and can also interfere with the systems being capable of providing individually attained information into command and control networks within required response times. Use of sociological processes related to holistic systems engineering, systems thinking and non-traditional professionals can be used to solve people-rated problems, to categorized unknowns for mitigating risks, and to then perform systems integration regarding communication and collaboration cognition systems.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129612368","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 : 2008-07-16DOI: 10.1109/NAECON.2008.4806576
Wonmo Koo, S. Chun, S. Sung, Young Jae Lee, T. Kang
This paper presents a real-time heading estimation algorithm using IMU and strapdown magnetometer without any other external heading reference. To calibrate the magnetic deviation, sensor errors caused by hard iron effect and initial heading of strapdown magnetometers are considered. In our approach, sensor output distortion due to the soft iron effect is ignored, which is relatively small. First, for the estimation of heading angle, system and measurement model is derived, which is nonlinear. Then particle filter and extended Kalman filter is introduced for performance comparison. The proposed algorithm for the integration of IMU and magnetometer is verified via numerical simulation in Matlab. Simulation result demonstrates accurate heading estimation error within 1 degree for both algorithms when there exists small initial heading error and hard iron effect, yet particle filter provides more robust and precise result than the extended Kalman filter in case the initial heading error and biases are large.
{"title":"In-flight Heading Estimation of Strapdown Magnetometers using Particle Filters","authors":"Wonmo Koo, S. Chun, S. Sung, Young Jae Lee, T. Kang","doi":"10.1109/NAECON.2008.4806576","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806576","url":null,"abstract":"This paper presents a real-time heading estimation algorithm using IMU and strapdown magnetometer without any other external heading reference. To calibrate the magnetic deviation, sensor errors caused by hard iron effect and initial heading of strapdown magnetometers are considered. In our approach, sensor output distortion due to the soft iron effect is ignored, which is relatively small. First, for the estimation of heading angle, system and measurement model is derived, which is nonlinear. Then particle filter and extended Kalman filter is introduced for performance comparison. The proposed algorithm for the integration of IMU and magnetometer is verified via numerical simulation in Matlab. Simulation result demonstrates accurate heading estimation error within 1 degree for both algorithms when there exists small initial heading error and hard iron effect, yet particle filter provides more robust and precise result than the extended Kalman filter in case the initial heading error and biases are large.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131107123","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}
D. Diggs, J. Grote, C. Bartsch, F. Ouchen, A. Sharma, J. Taguenang, A. Kassu, R. Sileshi
Photopatterning with 266 nm UV light was accomplished on spin-coated DNA thin films using two different techniques. Lithographic masks were used to create 10-100 micron-sized arrays of enhanced hydrophilicity. Two such masks were used: (1) Polka Dot Filter having opaque squares and a transparent grid and (2) A metal wire-mesh having transparent squares and opaque grid. UV light selectively photodissociates the DNA film where it is exposed into smaller more hydrophilic fragments. UV-exposed films are then coated with a solution of a protein. The protein appears to selectively coat over areas exposed to UV light. We have also used interferometric lithography with UV light to accomplish patterning on the scale of 1 micron on DNA thin films. This technique has the potential to generate micro/nano arrays and vary the array-size. This paper describes the fabrication of these microarrays and a plausible application for fabricating antibody arrays for protein sensing applications.
{"title":"UV Lithographic Patterning on Spin-coated DNA Thin-films","authors":"D. Diggs, J. Grote, C. Bartsch, F. Ouchen, A. Sharma, J. Taguenang, A. Kassu, R. Sileshi","doi":"10.1117/12.802222","DOIUrl":"https://doi.org/10.1117/12.802222","url":null,"abstract":"Photopatterning with 266 nm UV light was accomplished on spin-coated DNA thin films using two different techniques. Lithographic masks were used to create 10-100 micron-sized arrays of enhanced hydrophilicity. Two such masks were used: (1) Polka Dot Filter having opaque squares and a transparent grid and (2) A metal wire-mesh having transparent squares and opaque grid. UV light selectively photodissociates the DNA film where it is exposed into smaller more hydrophilic fragments. UV-exposed films are then coated with a solution of a protein. The protein appears to selectively coat over areas exposed to UV light. We have also used interferometric lithography with UV light to accomplish patterning on the scale of 1 micron on DNA thin films. This technique has the potential to generate micro/nano arrays and vary the array-size. This paper describes the fabrication of these microarrays and a plausible application for fabricating antibody arrays for protein sensing applications.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"202 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132641097","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 : 2008-07-16DOI: 10.1109/NAECON.2008.4806540
C. Pilcher, A. Khotanzad
This research explores the statistical performance of several classifiers (Bayes, nearest neighbor, and a neural network) on a maritime ATR problem. The features employed were derived from range profiles and inspired by the physical structure of the ship targets to maximize the generalizability of the classifiers. The ship targets were created using Pro Engineer (parametric technology corporation), facetized, and input into XPATCH. XPATCH was used to create range profiles from 0 to 30 degree aspect. A likelihood based confidence measure was employed to force the classifiers to output at 98% confidence. The confidence measure was based on a discriminant that was the distance between a classifier output and a template.
{"title":"Statistical Performance of classifiers for a maritime ATR Task","authors":"C. Pilcher, A. Khotanzad","doi":"10.1109/NAECON.2008.4806540","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806540","url":null,"abstract":"This research explores the statistical performance of several classifiers (Bayes, nearest neighbor, and a neural network) on a maritime ATR problem. The features employed were derived from range profiles and inspired by the physical structure of the ship targets to maximize the generalizability of the classifiers. The ship targets were created using Pro Engineer (parametric technology corporation), facetized, and input into XPATCH. XPATCH was used to create range profiles from 0 to 30 degree aspect. A likelihood based confidence measure was employed to force the classifiers to output at 98% confidence. The confidence measure was based on a discriminant that was the distance between a classifier output and a template.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123789943","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 : 2008-07-16DOI: 10.1109/NAECON.2008.4806531
S. Masturzo, H. Jackson, J. Boyd, R. Ewing, H. Abdel-Aty-Zohdy, J. Yarrison-Rice
Incorporation of DNA into nanoscale wells in a silicon substrate has been demonstrated to show fabrication feasibility for optically tunable photonic crystal waveguides. A change in propagation characteristics due to DNA incorporation has been observed for a silicon-on-insulator photonic crystal waveguide.
{"title":"Optically Tuneable Photonic Crystal Waveguides for Photonic Integrated Circuits","authors":"S. Masturzo, H. Jackson, J. Boyd, R. Ewing, H. Abdel-Aty-Zohdy, J. Yarrison-Rice","doi":"10.1109/NAECON.2008.4806531","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806531","url":null,"abstract":"Incorporation of DNA into nanoscale wells in a silicon substrate has been demonstrated to show fabrication feasibility for optically tunable photonic crystal waveguides. A change in propagation characteristics due to DNA incorporation has been observed for a silicon-on-insulator photonic crystal waveguide.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123273000","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 : 2008-07-16DOI: 10.1109/NAECON.2008.4806573
S. Toshniwal, A. Gaur, Demin Wang, D. Agrawal
Energy constrained nature and unattended deployment of sensors motivates the need of special techniques for designing reliable wireless sensor networks. Recently many approaches are considering mobile sensor nodes to deal with this problem. But making all the sensors mobile involves more signaling overhead for network maintenance. It is energy efficient to move the base station which has no power limitations. Also, there are many real life applications in which event based approach is more appropriate. In this paper, we propose an adaptive scheme for a mobile base station that moves according to the occurrence of events. We propose two optimization schemes: moving the BS towards the event centroid and moving the BS towards distance based weighted centroid. Simulation results show that moving the base station adaptively significantly prolongs the network lifetime.
{"title":"Mobility of a Base Station for Simultaneous Multiple Events in a Static Wireless Sensor Network","authors":"S. Toshniwal, A. Gaur, Demin Wang, D. Agrawal","doi":"10.1109/NAECON.2008.4806573","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806573","url":null,"abstract":"Energy constrained nature and unattended deployment of sensors motivates the need of special techniques for designing reliable wireless sensor networks. Recently many approaches are considering mobile sensor nodes to deal with this problem. But making all the sensors mobile involves more signaling overhead for network maintenance. It is energy efficient to move the base station which has no power limitations. Also, there are many real life applications in which event based approach is more appropriate. In this paper, we propose an adaptive scheme for a mobile base station that moves according to the occurrence of events. We propose two optimization schemes: moving the BS towards the event centroid and moving the BS towards distance based weighted centroid. Simulation results show that moving the base station adaptively significantly prolongs the network lifetime.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127259076","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 : 2008-07-16DOI: 10.1109/NAECON.2008.4806544
D. J. Nowak, G. Lamont
Interest in Self-Organized (SO) unmanned aerial vehicles (UAVs) systems is increasing because of their flexibility, versatility and economics. Many countries and industries are developing autonomous and swarming UAVs for reconnaissance, surveillance, intelligence gathering, and target engagement and neutralization. The processes for effectively developing these systems are still in their infancy. Currently, little effort is focused on building simple agent rules with low-level SO systems communication in order to facilitate emergent behaviors. Note that only with the use of effective control structures can the full potential of these systems realized. Presented is an innovative new paradigm for developing SO-based autonomous vehicles. Using a formal design model, the Interactive Partially Observable Markov Decision Process, a full understanding of this SO domain is possible. With this design model and a focused effort on the minimization of computational and informational complexity, emergent entangled control hierarchies allow the SO rules to operate efficiently and effectively. This work extends the formal model decomposition technique, and in doing so ties in the information theoretic optimization to develop emergent structures. Preliminary computational results reflect limited success.
{"title":"Autonomous Self Organized UAV Swarm Systemis","authors":"D. J. Nowak, G. Lamont","doi":"10.1109/NAECON.2008.4806544","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806544","url":null,"abstract":"Interest in Self-Organized (SO) unmanned aerial vehicles (UAVs) systems is increasing because of their flexibility, versatility and economics. Many countries and industries are developing autonomous and swarming UAVs for reconnaissance, surveillance, intelligence gathering, and target engagement and neutralization. The processes for effectively developing these systems are still in their infancy. Currently, little effort is focused on building simple agent rules with low-level SO systems communication in order to facilitate emergent behaviors. Note that only with the use of effective control structures can the full potential of these systems realized. Presented is an innovative new paradigm for developing SO-based autonomous vehicles. Using a formal design model, the Interactive Partially Observable Markov Decision Process, a full understanding of this SO domain is possible. With this design model and a focused effort on the minimization of computational and informational complexity, emergent entangled control hierarchies allow the SO rules to operate efficiently and effectively. This work extends the formal model decomposition technique, and in doing so ties in the information theoretic optimization to develop emergent structures. Preliminary computational results reflect limited success.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129848983","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 : 2008-07-16DOI: 10.1109/NAECON.2008.4806535
J. Teller, F. Ozguner, R. Ewing
In this paper, we propose a physical process inspired routing that routes data from a high-bandwidth data port to multiple processing tiles. Our routing is named magnetic based routing (MBR); data is "attracted" towards the processing tiles that need the data and is "repulsed" away from other data flows.
{"title":"Using a Tiled Architecture to Process Data from High-Bandwidth, Optical Interfaces","authors":"J. Teller, F. Ozguner, R. Ewing","doi":"10.1109/NAECON.2008.4806535","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806535","url":null,"abstract":"In this paper, we propose a physical process inspired routing that routes data from a high-bandwidth data port to multiple processing tiles. Our routing is named magnetic based routing (MBR); data is \"attracted\" towards the processing tiles that need the data and is \"repulsed\" away from other data flows.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129907936","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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