Pub Date : 2017-08-01DOI: 10.1109/INTERCON.2017.8079687
D. R. Velasquez, Victor Tomanguilla Collazos, Jose Machuca Mines
When learning different control related concepts and methods, simulation is often used as a training tool; but, it does not have some real time characteristics of implementation like dealing with coding and PC resources, supervision, and communications. In some cases, implementation cannot be carried away, since it involves hardware design and is expensive. The proposed solution in this paper involves low-cost Hardware-in-the-Loop for the Real Time Simulation of the plant or process to be controlled, a PC acting as a controller and a supervisor, and communications via Ethernet between the elements. It has the following advantages: new processes can be controlled by the PC without having to change the topology of the system; modifications on the plant or controller only require software changes; and has the potential of being extensible to a real system if the simulator software is changed to work as an Ethernet to analog decoder/transducer.
{"title":"A low-cost hardware-in-the-loop real time simulation of control systems","authors":"D. R. Velasquez, Victor Tomanguilla Collazos, Jose Machuca Mines","doi":"10.1109/INTERCON.2017.8079687","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079687","url":null,"abstract":"When learning different control related concepts and methods, simulation is often used as a training tool; but, it does not have some real time characteristics of implementation like dealing with coding and PC resources, supervision, and communications. In some cases, implementation cannot be carried away, since it involves hardware design and is expensive. The proposed solution in this paper involves low-cost Hardware-in-the-Loop for the Real Time Simulation of the plant or process to be controlled, a PC acting as a controller and a supervisor, and communications via Ethernet between the elements. It has the following advantages: new processes can be controlled by the PC without having to change the topology of the system; modifications on the plant or controller only require software changes; and has the potential of being extensible to a real system if the simulator software is changed to work as an Ethernet to analog decoder/transducer.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128911394","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079694
Yrithze López, Daphne Luna, Alvaro Talavera
This paper proposes a methodology based on Analytical Hierarchical Process (AHP) and Fuzzy Inference Systems (FIS), to obtain a better selection of Enterprise Resource Planning (ERP). The company, which are going to acquire the software, bases this selection on their own imposed criteria and the ERPs alternatives based on some supplier's information. To select the most appropriate ERP, at the beginning, AHP was used. Then, Through a FIS is evaluated the selected ERP to know if it comply with the business financial and operational performance. Finally, another FIS fuses these results in an only one, which is called ”acceptability level”. The proposed methodology try to quantify all the subjectivity that involve an ERP acquisition by a business.
{"title":"Selection of ERP based on analytical hierarchical process and fuzzy inference systems","authors":"Yrithze López, Daphne Luna, Alvaro Talavera","doi":"10.1109/INTERCON.2017.8079694","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079694","url":null,"abstract":"This paper proposes a methodology based on Analytical Hierarchical Process (AHP) and Fuzzy Inference Systems (FIS), to obtain a better selection of Enterprise Resource Planning (ERP). The company, which are going to acquire the software, bases this selection on their own imposed criteria and the ERPs alternatives based on some supplier's information. To select the most appropriate ERP, at the beginning, AHP was used. Then, Through a FIS is evaluated the selected ERP to know if it comply with the business financial and operational performance. Finally, another FIS fuses these results in an only one, which is called ”acceptability level”. The proposed methodology try to quantify all the subjectivity that involve an ERP acquisition by a business.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129214483","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079665
H. Nieto-Chaupis
The human kidney can be seriously threated in the cases where the presence of bunches of electric charges may cancel its electric shield that plays the protectionist role against the pass of giant proteins through the urine. In this paper we use simple physics equations in order to extract the electric field which exerts force on the negative charge distribution located along the glomerular membrane basement and podocytes. The electric forces might be perceived as input signals inside the framework of the Internet of the Bio-Nano Things. In this paper, we have paid attention to the renal glomerulus which is supposed to be very sensitive to the presence of electric fields because the dipole moment of sugar which is one of the charged electrically components of the blood plasm. We provided a simple example which might explain the continuous degradation of kidney in patients with diagnosis of type-2 diabetes.
{"title":"Modeling the dynamics of failure of the electric shield at the renal glomerulus","authors":"H. Nieto-Chaupis","doi":"10.1109/INTERCON.2017.8079665","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079665","url":null,"abstract":"The human kidney can be seriously threated in the cases where the presence of bunches of electric charges may cancel its electric shield that plays the protectionist role against the pass of giant proteins through the urine. In this paper we use simple physics equations in order to extract the electric field which exerts force on the negative charge distribution located along the glomerular membrane basement and podocytes. The electric forces might be perceived as input signals inside the framework of the Internet of the Bio-Nano Things. In this paper, we have paid attention to the renal glomerulus which is supposed to be very sensitive to the presence of electric fields because the dipole moment of sugar which is one of the charged electrically components of the blood plasm. We provided a simple example which might explain the continuous degradation of kidney in patients with diagnosis of type-2 diabetes.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127781308","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079660
Wilfredo M. Ticona, Karla Figueiredo, M. Vellasco
Everywhere in the world tax revenues are rolled back for the commonwealth to invest and finance goods and public services, such as: infrastructure, health, security and education. The predict income revenue (taxes) is one of the challenges that the Secretariat of the Federal Revenue of Brazil (RFB for its Portuguese acronym) has. This is an important challenge since the obtained information is valuable to support the decisions pertaining the federal government financial planning. In this work, it is introduced a hybrid model based on Genetic Algorithms (GAs) and Neural Networks (NNs) for a multi-step forecast of tax revenue collection. The results were more accurate in comparison to the outcome the RFB had estimated with the indicators method. The forecast results using endogenous and exogenous variables were divided into two parts: (i) in 2013 (validation period), there was obtained a Mean Absolute Percentage Error (MAPE) of 2.37% and a decrease of the Relative Error of 11.38% to 0.49%; (ii) in 2014 (testing data set) a decrease of Relative Error of 10.82% to 3.51% was obtained.
{"title":"Hybrid model based on genetic algorithms and neural networks to forecast tax collection: Application using endogenous and exogenous variables","authors":"Wilfredo M. Ticona, Karla Figueiredo, M. Vellasco","doi":"10.1109/INTERCON.2017.8079660","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079660","url":null,"abstract":"Everywhere in the world tax revenues are rolled back for the commonwealth to invest and finance goods and public services, such as: infrastructure, health, security and education. The predict income revenue (taxes) is one of the challenges that the Secretariat of the Federal Revenue of Brazil (RFB for its Portuguese acronym) has. This is an important challenge since the obtained information is valuable to support the decisions pertaining the federal government financial planning. In this work, it is introduced a hybrid model based on Genetic Algorithms (GAs) and Neural Networks (NNs) for a multi-step forecast of tax revenue collection. The results were more accurate in comparison to the outcome the RFB had estimated with the indicators method. The forecast results using endogenous and exogenous variables were divided into two parts: (i) in 2013 (validation period), there was obtained a Mean Absolute Percentage Error (MAPE) of 2.37% and a decrease of the Relative Error of 11.38% to 0.49%; (ii) in 2014 (testing data set) a decrease of Relative Error of 10.82% to 3.51% was obtained.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130576167","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079720
G. Carlos, Leonidas Gabriel, H. N. Pedro
This article presents the designing and construction of an electrohydraulic system controlled via the microcontroller ATmega328P and the Matlab software using the graphical programming environment Simulink by means of programmable blocks. These blocks achieve the communication through a COM serial port specifically configured for this task; this interaction allows the control of two hydraulic pistons connected to the system's platform, which enables the control of the platform displacement. Through this system, it is possible to reproduce seismic events registered in Lima during the last years.
{"title":"Designing of control using Matlab and Arduino for a electrohydraulic system from seismic simulation","authors":"G. Carlos, Leonidas Gabriel, H. N. Pedro","doi":"10.1109/INTERCON.2017.8079720","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079720","url":null,"abstract":"This article presents the designing and construction of an electrohydraulic system controlled via the microcontroller ATmega328P and the Matlab software using the graphical programming environment Simulink by means of programmable blocks. These blocks achieve the communication through a COM serial port specifically configured for this task; this interaction allows the control of two hydraulic pistons connected to the system's platform, which enables the control of the platform displacement. Through this system, it is possible to reproduce seismic events registered in Lima during the last years.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"366 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134018444","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079725
R. R., Jorge Rendulich Talavera, Enrique A. Soto Mendoza, Nelly M. Dávila, Elvis Supo
The quality of electrocardiogram (ECG) signal is fundamental for reliable patient diagnosis. Reality is that ECG signal will be, in most cases, corrupted with electromagnetic interference (EMI) from several sources, mainly power-line. This type of interference can be reduced with different well-known methods like IIR (infinite impulse response) notch filters and adaptive cancelling algorithms. In this work, a 60 Hz interference cancellation algorithm is applied on real ECG data, which is processed in an embedded system built on STMicroelectronics STM32F401RE Cortex M4 microcontroller, and multichannel 24-bit ADS1298 (ADC) from Texas Instruments. The performance of this embedded algorithm is calculated as interference suppression (percentage) and extracted interference from a single ADS1298 channel.
{"title":"Implementation of a real-time 60 Hz interference cancellation algorithm for ECG signals based on ARM cortex M4 and ADS1298","authors":"R. R., Jorge Rendulich Talavera, Enrique A. Soto Mendoza, Nelly M. Dávila, Elvis Supo","doi":"10.1109/INTERCON.2017.8079725","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079725","url":null,"abstract":"The quality of electrocardiogram (ECG) signal is fundamental for reliable patient diagnosis. Reality is that ECG signal will be, in most cases, corrupted with electromagnetic interference (EMI) from several sources, mainly power-line. This type of interference can be reduced with different well-known methods like IIR (infinite impulse response) notch filters and adaptive cancelling algorithms. In this work, a 60 Hz interference cancellation algorithm is applied on real ECG data, which is processed in an embedded system built on STMicroelectronics STM32F401RE Cortex M4 microcontroller, and multichannel 24-bit ADS1298 (ADC) from Texas Instruments. The performance of this embedded algorithm is calculated as interference suppression (percentage) and extracted interference from a single ADS1298 channel.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123622795","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079728
Gustavo Solano, Franco Lama, Jordan Terrazos, Jimmy Tarrillo
This article presents the design and develop of a weather station for educational purposes, which can be monitored continuously under different kinds of climatological changes and works autonomously to the energy network. The proposal of this design is based mainly on the measurement of temperature, humidity, wind, UV radiation and rain parameters using low cost commercial sensors compatible with the Arduino platform.
{"title":"Weather station for educational purposes based on Atmega8L","authors":"Gustavo Solano, Franco Lama, Jordan Terrazos, Jimmy Tarrillo","doi":"10.1109/INTERCON.2017.8079728","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079728","url":null,"abstract":"This article presents the design and develop of a weather station for educational purposes, which can be monitored continuously under different kinds of climatological changes and works autonomously to the energy network. The proposal of this design is based mainly on the measurement of temperature, humidity, wind, UV radiation and rain parameters using low cost commercial sensors compatible with the Arduino platform.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123854294","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079661
Alexi Delgado
Social conflicts in the world have increased, due to the fact that the natural resources is being over exploited. In this work, we conducted a social conflict analysis using the entropy-weight method, which is based on Shannon entropy theory. The case study was conducted on a mining project allocated in northern Peru. The rural population and urban population stakeholder groups were analyzed under seven social criteria or variables. The results revealed that the criterion most likely to generate social conflict between stakeholder groups was access to drinking water. These results could help to central and local governments to make the best decision in order to prevent possible social conflict. The entropy-weight method showed interesting results and could be applied to other social conflicts, as this method considers the uncertainty within its analysis.
{"title":"Social conflict analysis on a mining project using shannon entropy","authors":"Alexi Delgado","doi":"10.1109/INTERCON.2017.8079661","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079661","url":null,"abstract":"Social conflicts in the world have increased, due to the fact that the natural resources is being over exploited. In this work, we conducted a social conflict analysis using the entropy-weight method, which is based on Shannon entropy theory. The case study was conducted on a mining project allocated in northern Peru. The rural population and urban population stakeholder groups were analyzed under seven social criteria or variables. The results revealed that the criterion most likely to generate social conflict between stakeholder groups was access to drinking water. These results could help to central and local governments to make the best decision in order to prevent possible social conflict. The entropy-weight method showed interesting results and could be applied to other social conflicts, as this method considers the uncertainty within its analysis.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127987254","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079680
D. L. Oliveira, Orlando Verducci, L. Faria, T. Curtinhas
Digital circuit design may demand critical requirements, such as power consumption, robustness, performance, etc., while being implemented in VLSI (Very Large Scale Integration). The asynchronous paradigm presents interesting features that serve as an alternative to these critical requirements. An important class of the asynchronous paradigm is the one called QDI (Quasi Delay Insensitive) circuits that can also be used for critical requirements design. QDI circuits are interesting for these applications because they are robust to certain kinds of faults, to noise and to temperature and supply voltage variations, having also low electromagnetic emissions. An interesting style of QDI circuits is the NCL (Κ Convention Logic) circuits because they accept conventional Boolean functions and can achieve great optimization. This paper presents an architecture based on basic QDI gates for the synthesis of NCL gates focusing on VLSI that uses only standard libraries and FPGA (Field Programmable Gate Array).
{"title":"A novel Κ convention logic (NCL) gates architecture based on basic gates","authors":"D. L. Oliveira, Orlando Verducci, L. Faria, T. Curtinhas","doi":"10.1109/INTERCON.2017.8079680","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079680","url":null,"abstract":"Digital circuit design may demand critical requirements, such as power consumption, robustness, performance, etc., while being implemented in VLSI (Very Large Scale Integration). The asynchronous paradigm presents interesting features that serve as an alternative to these critical requirements. An important class of the asynchronous paradigm is the one called QDI (Quasi Delay Insensitive) circuits that can also be used for critical requirements design. QDI circuits are interesting for these applications because they are robust to certain kinds of faults, to noise and to temperature and supply voltage variations, having also low electromagnetic emissions. An interesting style of QDI circuits is the NCL (Κ Convention Logic) circuits because they accept conventional Boolean functions and can achieve great optimization. This paper presents an architecture based on basic QDI gates for the synthesis of NCL gates focusing on VLSI that uses only standard libraries and FPGA (Field Programmable Gate Array).","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126879081","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079716
L. P. Fernandez, Jorge Luis Diaz Rodriguez, Edison Andrés Caicedo Peñparanda
This paper deals with the development of a V/F control of an induction motor with THD optimization using cascaded multilevel converters. The optimization algorithm was a genetic algorithm, which allows to obtain a voltage vs. frequency ratio (V/F) that decreases the voltage value as the frequency is reduced by maintaining the total harmonic distortion (THD) at levels very close to 0% over the entire frequency range of operation. The power converter is a common-source cascaded H-bridge multilevel inverter with maximum 15 steps per line voltage. The inverter was simulated by supplying a three-phase induction motor. The result of the simulations allows verify the optimization of the THD throughout all of the frequency operation range.
{"title":"V/F control of an induction motor with THD optimization using cascaded multilevel converters","authors":"L. P. Fernandez, Jorge Luis Diaz Rodriguez, Edison Andrés Caicedo Peñparanda","doi":"10.1109/INTERCON.2017.8079716","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079716","url":null,"abstract":"This paper deals with the development of a V/F control of an induction motor with THD optimization using cascaded multilevel converters. The optimization algorithm was a genetic algorithm, which allows to obtain a voltage vs. frequency ratio (V/F) that decreases the voltage value as the frequency is reduced by maintaining the total harmonic distortion (THD) at levels very close to 0% over the entire frequency range of operation. The power converter is a common-source cascaded H-bridge multilevel inverter with maximum 15 steps per line voltage. The inverter was simulated by supplying a three-phase induction motor. The result of the simulations allows verify the optimization of the THD throughout all of the frequency operation range.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114667240","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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