Pub Date : 2018-10-01DOI: 10.1109/ICA-ACCA.2018.8609766
Héctor Kaschel, Cristian Ahumada
This paper presents a new design of a sextuple band microstrip antenna for wearable applications a WBAN (Wireless Body Area Network) low SAR (Specific Absorption Rate). The proposed antenna consists of L-shaped slots have been determined based on the frequency bands. For the integration of these techniques six frequency bands consisting of the GSM 1.8 GHz, the WLAN standard IEEE 802.11 ah the band 900 MHz, the ISM band 2.4 GHz and 5.7 GHz, and 3.5 GHz band UWB respectively were considered. The proposed antenna is designed with the purpose of obtaining a low SAR models of the human body, considering both the electromagnetic effect and the shell model in human tissues.
{"title":"Design of a Sextuple Band Microstrip Antenna for wearable applications a WBAN the Low SAR","authors":"Héctor Kaschel, Cristian Ahumada","doi":"10.1109/ICA-ACCA.2018.8609766","DOIUrl":"https://doi.org/10.1109/ICA-ACCA.2018.8609766","url":null,"abstract":"This paper presents a new design of a sextuple band microstrip antenna for wearable applications a WBAN (Wireless Body Area Network) low SAR (Specific Absorption Rate). The proposed antenna consists of L-shaped slots have been determined based on the frequency bands. For the integration of these techniques six frequency bands consisting of the GSM 1.8 GHz, the WLAN standard IEEE 802.11 ah the band 900 MHz, the ISM band 2.4 GHz and 5.7 GHz, and 3.5 GHz band UWB respectively were considered. The proposed antenna is designed with the purpose of obtaining a low SAR models of the human body, considering both the electromagnetic effect and the shell model in human tissues.","PeriodicalId":176587,"journal":{"name":"2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130711154","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 : 2018-10-01DOI: 10.1109/ICA-ACCA.2018.8609739
Matías Garbarino, Rodrigo Morales, J. Rohten, Vladimir Esparza, E. Rubio, P. Melín, J. Guzmán
This paper presents the comparison between three control strategies: a PID based control, the gains schedule PID based control and a combination of PID and states feedback based control for a dc-dc power converter. The dc-dc converter is usually employed on renewables energies to pump the voltage up to standard values on the grid couple point, which in the case of Chile is 220V rms and 50Hz; or to be used on voltage regulators, which needs to maintain the voltage tracking a reference independently of the input voltage supply. The main objective is to achieve controllable system into the whole power converter operating region, with similar dynamic responses. To corroborate the mathematical study and the proposed design, simulations tests were performed in Simulink/Matlab environment showing every strategy strengths to fairly compare the results under disturbances and references changes.
{"title":"PID Control Strategies Comparison with Gain Schedule and States Feedback in a Buck-Boost Converter","authors":"Matías Garbarino, Rodrigo Morales, J. Rohten, Vladimir Esparza, E. Rubio, P. Melín, J. Guzmán","doi":"10.1109/ICA-ACCA.2018.8609739","DOIUrl":"https://doi.org/10.1109/ICA-ACCA.2018.8609739","url":null,"abstract":"This paper presents the comparison between three control strategies: a PID based control, the gains schedule PID based control and a combination of PID and states feedback based control for a dc-dc power converter. The dc-dc converter is usually employed on renewables energies to pump the voltage up to standard values on the grid couple point, which in the case of Chile is 220V rms and 50Hz; or to be used on voltage regulators, which needs to maintain the voltage tracking a reference independently of the input voltage supply. The main objective is to achieve controllable system into the whole power converter operating region, with similar dynamic responses. To corroborate the mathematical study and the proposed design, simulations tests were performed in Simulink/Matlab environment showing every strategy strengths to fairly compare the results under disturbances and references changes.","PeriodicalId":176587,"journal":{"name":"2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129921618","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 : 2018-10-01DOI: 10.1109/ICA-ACCA.2018.8609768
C. Morales, Katherine Henríquez, Rodrigo Muoz
Integration of Internet of Things, Big Data and Cloud Computing technologies is already a fact in big industry. The smart factory and industry 4.0 integrate these technologies from the very design phase. But outside this area, the adoption of these new technologies will not be so fast and legacy machines will continue providing services for a while, making solutions to integrate new technologies in legacy production lines a need. The present work shows the results of applying a Big Data system for fault diagnosis in a semi-automated production line. The methodology used to implement a minimally invasive system that uses technologies in the state of the art is exposed and results achieved are presented.
{"title":"Using Big Data for fault diagnosis in legacy manufacturing production lines","authors":"C. Morales, Katherine Henríquez, Rodrigo Muoz","doi":"10.1109/ICA-ACCA.2018.8609768","DOIUrl":"https://doi.org/10.1109/ICA-ACCA.2018.8609768","url":null,"abstract":"Integration of Internet of Things, Big Data and Cloud Computing technologies is already a fact in big industry. The smart factory and industry 4.0 integrate these technologies from the very design phase. But outside this area, the adoption of these new technologies will not be so fast and legacy machines will continue providing services for a while, making solutions to integrate new technologies in legacy production lines a need. The present work shows the results of applying a Big Data system for fault diagnosis in a semi-automated production line. The methodology used to implement a minimally invasive system that uses technologies in the state of the art is exposed and results achieved are presented.","PeriodicalId":176587,"journal":{"name":"2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126436066","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 : 2018-10-01DOI: 10.1109/ICA-ACCA.2018.8609727
N. Aguila-Camacho, C. Ponce
This paper presents a preliminary analysis of the energy spent making control of first order plus time delay (FOPTD) plants, using a fractional proportional integral (FOPI) controller. Using three representative FOPTD plants and adjusting the FOPI parameters, the control energy is analyzed using simulation studies. The results are compared to that obtained using a classical proportional integral (PI) controller using the same tuning rule, under ideal conditions and also in the presence of non linearity in the sensor path, showing that the energy used for control can be reduced when using the FOPI controller, compared to the case using the PI controller. This suggests that using FOPI could be more efficient than using integer order controllers, from an an energy use viewpoint, justifying a follow up of this research.
{"title":"Improving the control energy use for first order plus time delay plants with fractional proportional integral controllers: a preliminary analysis","authors":"N. Aguila-Camacho, C. Ponce","doi":"10.1109/ICA-ACCA.2018.8609727","DOIUrl":"https://doi.org/10.1109/ICA-ACCA.2018.8609727","url":null,"abstract":"This paper presents a preliminary analysis of the energy spent making control of first order plus time delay (FOPTD) plants, using a fractional proportional integral (FOPI) controller. Using three representative FOPTD plants and adjusting the FOPI parameters, the control energy is analyzed using simulation studies. The results are compared to that obtained using a classical proportional integral (PI) controller using the same tuning rule, under ideal conditions and also in the presence of non linearity in the sensor path, showing that the energy used for control can be reduced when using the FOPI controller, compared to the case using the PI controller. This suggests that using FOPI could be more efficient than using integer order controllers, from an an energy use viewpoint, justifying a follow up of this research.","PeriodicalId":176587,"journal":{"name":"2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125556775","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 : 2018-10-01DOI: 10.1109/ICA-ACCA.2018.8609845
Oscar Ancán, Carlos Cares
In Software Engineering, maintainability is considered a non-functional feature that gives the software the ability to be modified effectively and efficiently. In the late 1990s, code smells emerged as a way to approach potential failures. Although the link between code smells and effort has been studied, there are few quantitative studies trying to demonstrate the relationship between code smells and effort of maintenance. In this paper an experiment is used to analyze whether there are any differences in effort when performing perfective maintenance with and without a code smell. However, no significant differences were found between the control group and the experimental group, indicating that elimination of code smells would not substantially impact effort. The result is relevant because refactoring efforts appear not having a significative effect on maintainability. Finally, the presence of a threshold of code smells concentration would make it possible to determine when refactoring would become a viable activity.
{"title":"Are Relevant the Code Smells on Maintainability Effort? A Laboratory Experiment","authors":"Oscar Ancán, Carlos Cares","doi":"10.1109/ICA-ACCA.2018.8609845","DOIUrl":"https://doi.org/10.1109/ICA-ACCA.2018.8609845","url":null,"abstract":"In Software Engineering, maintainability is considered a non-functional feature that gives the software the ability to be modified effectively and efficiently. In the late 1990s, code smells emerged as a way to approach potential failures. Although the link between code smells and effort has been studied, there are few quantitative studies trying to demonstrate the relationship between code smells and effort of maintenance. In this paper an experiment is used to analyze whether there are any differences in effort when performing perfective maintenance with and without a code smell. However, no significant differences were found between the control group and the experimental group, indicating that elimination of code smells would not substantially impact effort. The result is relevant because refactoring efforts appear not having a significative effect on maintainability. Finally, the presence of a threshold of code smells concentration would make it possible to determine when refactoring would become a viable activity.","PeriodicalId":176587,"journal":{"name":"2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126336155","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 : 2018-10-01DOI: 10.1109/ICA-ACCA.2018.8609829
M. Hosseinzadeh, M. Sarbanzadeh, E. Sarebanzadeh, M. Rivera, J. Muñoz
Multilevel inverters are suitable option for changing DC power to AC power in medium-voltage and high-power applications. This work look for to present a new module featuring a low amount of devices for a multilevel converter with cascaded connection. The proposed module consists of a modified T-type topology and a half-bridge inverter that is back-to-back connected. The proposed circuit includes five dc voltage sources and nine semiconductor switches that generate 23 levels. To show the superiority of the proposed topology, a detailed comparison is made with other comparable multilevel converter topologies. Simulations in MATLAB/Simulink are shown to validate the behavior of the proposal.
{"title":"New Sub-Module for Cascaded Multilevel Inverters with Reduced Switching Devices","authors":"M. Hosseinzadeh, M. Sarbanzadeh, E. Sarebanzadeh, M. Rivera, J. Muñoz","doi":"10.1109/ICA-ACCA.2018.8609829","DOIUrl":"https://doi.org/10.1109/ICA-ACCA.2018.8609829","url":null,"abstract":"Multilevel inverters are suitable option for changing DC power to AC power in medium-voltage and high-power applications. This work look for to present a new module featuring a low amount of devices for a multilevel converter with cascaded connection. The proposed module consists of a modified T-type topology and a half-bridge inverter that is back-to-back connected. The proposed circuit includes five dc voltage sources and nine semiconductor switches that generate 23 levels. To show the superiority of the proposed topology, a detailed comparison is made with other comparable multilevel converter topologies. Simulations in MATLAB/Simulink are shown to validate the behavior of the proposal.","PeriodicalId":176587,"journal":{"name":"2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA)","volume":"234 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114197732","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 : 2018-10-01DOI: 10.1109/ICA-ACCA.2018.8609815
C. Montoya, J. Tapia, C. Pesce, J. Riedemann, G. Bramerdorfer, W. Jara
A novel winding configuration for an open-slot permanent magnet synchronous machines with modular stator (MPMSM) that improves the electromagnetic performance is proposed in this paper. Core-coil-winding (CCW) in combination with tooth tips between the stator modules are used to increase the induced voltage and electromagnetic torque. Furthermore, the proposed topology helps to reduce the eddy current losses in the permanent magnets. A 24 slot and 20 poles CCW-MPMSM is analyzed by means of finite element method and compared with a machine with the same rotor structure and continuous stator core (classical topology). The preliminary results show that the CCWMPMSM achieves similar performance compared to the classical topology when a suitable value of tooth tips width is selected.
{"title":"Electromagnetic Analysis of a Novel PMSM with Modular Stator for Low Power Generation","authors":"C. Montoya, J. Tapia, C. Pesce, J. Riedemann, G. Bramerdorfer, W. Jara","doi":"10.1109/ICA-ACCA.2018.8609815","DOIUrl":"https://doi.org/10.1109/ICA-ACCA.2018.8609815","url":null,"abstract":"A novel winding configuration for an open-slot permanent magnet synchronous machines with modular stator (MPMSM) that improves the electromagnetic performance is proposed in this paper. Core-coil-winding (CCW) in combination with tooth tips between the stator modules are used to increase the induced voltage and electromagnetic torque. Furthermore, the proposed topology helps to reduce the eddy current losses in the permanent magnets. A 24 slot and 20 poles CCW-MPMSM is analyzed by means of finite element method and compared with a machine with the same rotor structure and continuous stator core (classical topology). The preliminary results show that the CCWMPMSM achieves similar performance compared to the classical topology when a suitable value of tooth tips width is selected.","PeriodicalId":176587,"journal":{"name":"2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121620042","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 : 2018-10-01DOI: 10.1109/ICA-ACCA.2018.8609736
M. Rivera, D. Faundez, J. Kolar, P. Wheeler
Nowadays, electrical energy is the alternative to supply aircraft systems. In this paper a new converter for ground power units supply in aircraft applications is proposed. The topology consists in a rectifier with an active current injection circuit linked to a three level neutral point clamped converter. The design procedure is detailed in this paper showing the principal requirements for the safe operation of the converter. Simulation results validate the good performance of the proposed system.
{"title":"A New Topology of AC-AC Ground Power Unit for Aeronautical Applications","authors":"M. Rivera, D. Faundez, J. Kolar, P. Wheeler","doi":"10.1109/ICA-ACCA.2018.8609736","DOIUrl":"https://doi.org/10.1109/ICA-ACCA.2018.8609736","url":null,"abstract":"Nowadays, electrical energy is the alternative to supply aircraft systems. In this paper a new converter for ground power units supply in aircraft applications is proposed. The topology consists in a rectifier with an active current injection circuit linked to a three level neutral point clamped converter. The design procedure is detailed in this paper showing the principal requirements for the safe operation of the converter. Simulation results validate the good performance of the proposed system.","PeriodicalId":176587,"journal":{"name":"2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131405727","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 : 2018-10-01DOI: 10.1109/ICA-ACCA.2018.8609732
Víctor Aguayo, Silvana Navarro, D. Vega, J. Rohten, P. Melín, Á. Estrada, Oscar Castro
Multilevel converters can manage electric energy adding a low Total Harmonic Distortion (THD), with good behavior on their variables and fast dynamic performance. The importance of the power converter control leads to manage the variables in order to track the references into all operating region and therefore may inject the energy into the system disturbance independence of. Therefore, this works employs predictive control technique in a single-phase multi-cell topology to inject power coming from a solar array to the grid, imposing a fast dynamic performance and reactive power compensation. In addition, predictive control together with a SPWM modulation technique fix the switching commutation spectrum and cancel the dominant harmonics throughout the cells of every phase. Finally, the control design is corroborated by simulation results including several tests to see the closed loop system perform.
{"title":"Solar Energy Injection for a Multilevel Power Converter9 Using Predictive Control Strategy","authors":"Víctor Aguayo, Silvana Navarro, D. Vega, J. Rohten, P. Melín, Á. Estrada, Oscar Castro","doi":"10.1109/ICA-ACCA.2018.8609732","DOIUrl":"https://doi.org/10.1109/ICA-ACCA.2018.8609732","url":null,"abstract":"Multilevel converters can manage electric energy adding a low Total Harmonic Distortion (THD), with good behavior on their variables and fast dynamic performance. The importance of the power converter control leads to manage the variables in order to track the references into all operating region and therefore may inject the energy into the system disturbance independence of. Therefore, this works employs predictive control technique in a single-phase multi-cell topology to inject power coming from a solar array to the grid, imposing a fast dynamic performance and reactive power compensation. In addition, predictive control together with a SPWM modulation technique fix the switching commutation spectrum and cancel the dominant harmonics throughout the cells of every phase. Finally, the control design is corroborated by simulation results including several tests to see the closed loop system perform.","PeriodicalId":176587,"journal":{"name":"2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133467401","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 : 2018-10-01DOI: 10.1109/ICA-ACCA.2018.8609844
Witman Alvarado-Díaz, Brian Meneses-Claudio, Victor Romero-Alva, Oscar Minaya-Varas, A. Roman-Gonzalez, M. Zimic
The bioimpedance analysis is a technique used with a small alternating current to determine the impedance that is the human body’s opposition to the electric current. The bioelectrical impedance analysis equipment, which currently exists, is not prepared to be used in under-ten children, since they do not have the necessary formulas to perform the calculations, which is why in this project it is demonstrated by making use of electronic circuits and microcontrollers, that it is possible to make an analysis of electric impedance in under-ten children, thanks to the development of a device through which it is possible to estimate the impedance of the human body and with this it was possible to find the percentage of body fat, in addition to parameters such as lean mass (mass that is not fat), fat mass, total water and body mass index.
{"title":"Design of a System of Analysis of Bioimpedance in Children","authors":"Witman Alvarado-Díaz, Brian Meneses-Claudio, Victor Romero-Alva, Oscar Minaya-Varas, A. Roman-Gonzalez, M. Zimic","doi":"10.1109/ICA-ACCA.2018.8609844","DOIUrl":"https://doi.org/10.1109/ICA-ACCA.2018.8609844","url":null,"abstract":"The bioimpedance analysis is a technique used with a small alternating current to determine the impedance that is the human body’s opposition to the electric current. The bioelectrical impedance analysis equipment, which currently exists, is not prepared to be used in under-ten children, since they do not have the necessary formulas to perform the calculations, which is why in this project it is demonstrated by making use of electronic circuits and microcontrollers, that it is possible to make an analysis of electric impedance in under-ten children, thanks to the development of a device through which it is possible to estimate the impedance of the human body and with this it was possible to find the percentage of body fat, in addition to parameters such as lean mass (mass that is not fat), fat mass, total water and body mass index.","PeriodicalId":176587,"journal":{"name":"2018 IEEE International Conference on Automation/XXIII Congress of the Chilean Association of Automatic Control (ICA-ACCA)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127659255","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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