Pub Date : 2017-05-01DOI: 10.1109/ICEMIS.2017.8273040
Chaima. Rkiai, H. Chaouali, H. Othmani, A. Mami
This study presents an improvement of a classical IFOC speed control technique for a 3 phased asynchronous machine by implementing a Fuzzy Logic controller and an MRAS observer replacing speed sensor. Different simulations are made to investigate the robustness of speed estimation and control of rotor speed by imposing sudden variations in speed reference and load nature. The obtained results show the efficiency and the robustness of both developed MRAS speed observer and Fuzzy Logic controller against the introduced perturbations.
{"title":"Sensorless speed control of a 3 phased asynchronous machine based on MRAS observer and fuzzy logic control technique","authors":"Chaima. Rkiai, H. Chaouali, H. Othmani, A. Mami","doi":"10.1109/ICEMIS.2017.8273040","DOIUrl":"https://doi.org/10.1109/ICEMIS.2017.8273040","url":null,"abstract":"This study presents an improvement of a classical IFOC speed control technique for a 3 phased asynchronous machine by implementing a Fuzzy Logic controller and an MRAS observer replacing speed sensor. Different simulations are made to investigate the robustness of speed estimation and control of rotor speed by imposing sudden variations in speed reference and load nature. The obtained results show the efficiency and the robustness of both developed MRAS speed observer and Fuzzy Logic controller against the introduced perturbations.","PeriodicalId":117908,"journal":{"name":"2017 International Conference on Engineering & MIS (ICEMIS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133738229","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 : 2017-05-01DOI: 10.1109/ICEMIS.2017.8272997
Hajer Najjar, R. Bourguiba, Jaouhar Mouine
This paper presents an updated implementation of the Deriche edge detector in the era of programmable systems-on-chip, that will offer a new opportunity to integrate a whole segmentation chain in a single device. Based on existing optimizations of the filter we judiciously manage the area and the memory so as to leave enough space to insert the rest of the chain units.
{"title":"Real-time implementation of the Deriche edge detector on the Zybo board","authors":"Hajer Najjar, R. Bourguiba, Jaouhar Mouine","doi":"10.1109/ICEMIS.2017.8272997","DOIUrl":"https://doi.org/10.1109/ICEMIS.2017.8272997","url":null,"abstract":"This paper presents an updated implementation of the Deriche edge detector in the era of programmable systems-on-chip, that will offer a new opportunity to integrate a whole segmentation chain in a single device. Based on existing optimizations of the filter we judiciously manage the area and the memory so as to leave enough space to insert the rest of the chain units.","PeriodicalId":117908,"journal":{"name":"2017 International Conference on Engineering & MIS (ICEMIS)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134000093","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 : 2017-05-01DOI: 10.1109/ICEMIS.2017.8273090
R. Belghouthi, T. Selmi
We present in this paper a new model of a InGaN PV module made up of numerous cells interconnected in diverse potential configurations. The spontaneous and the piezoelectric polarizations effects have been included within the Matlab/Simulink model. Using our model, one can use it, and determine all the necessary parameters under any new conditions of irradiance and temperature and then, obtain the I(V) and P(V) characteristics. The model has shown promising and accurate results and would aid researchers in the field of power electronics to consider it as a truthful PV generator (PVG).
{"title":"Modeling of InGaN PV module using Matlab/Simulink","authors":"R. Belghouthi, T. Selmi","doi":"10.1109/ICEMIS.2017.8273090","DOIUrl":"https://doi.org/10.1109/ICEMIS.2017.8273090","url":null,"abstract":"We present in this paper a new model of a InGaN PV module made up of numerous cells interconnected in diverse potential configurations. The spontaneous and the piezoelectric polarizations effects have been included within the Matlab/Simulink model. Using our model, one can use it, and determine all the necessary parameters under any new conditions of irradiance and temperature and then, obtain the I(V) and P(V) characteristics. The model has shown promising and accurate results and would aid researchers in the field of power electronics to consider it as a truthful PV generator (PVG).","PeriodicalId":117908,"journal":{"name":"2017 International Conference on Engineering & MIS (ICEMIS)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133030561","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 : 2017-05-01DOI: 10.1109/ICEMIS.2017.8273015
Sonia Zouaoui, L. Boussaid, A. Mtibaa
In a multi-tasking system, numerous tasks require CPU time, and since there is only one CPU, some form of organization and coordination is needed so each task has the CPU time it needs. In practice, each task takes a very brief amount of time, so it seems as if all the tasks are executing in parallel and simultaneously. In the case of excessive complexity applications, which usually run in hard real time constraints, the use of a real time operating system (RTOS) is strongly required. In this paper, a tiny and reliable RTOS was implemented for PIC18F family of microcontroller. This operating system, which is called SmallRTOS, is based on Round-Robin scheduler. The used system tick is based on a variable time-sliced scheduling that has a direct effect on CPU load, context switching and process waiting time.
{"title":"SmallRTOS: Microcontroller-based embedded multitasking","authors":"Sonia Zouaoui, L. Boussaid, A. Mtibaa","doi":"10.1109/ICEMIS.2017.8273015","DOIUrl":"https://doi.org/10.1109/ICEMIS.2017.8273015","url":null,"abstract":"In a multi-tasking system, numerous tasks require CPU time, and since there is only one CPU, some form of organization and coordination is needed so each task has the CPU time it needs. In practice, each task takes a very brief amount of time, so it seems as if all the tasks are executing in parallel and simultaneously. In the case of excessive complexity applications, which usually run in hard real time constraints, the use of a real time operating system (RTOS) is strongly required. In this paper, a tiny and reliable RTOS was implemented for PIC18F family of microcontroller. This operating system, which is called SmallRTOS, is based on Round-Robin scheduler. The used system tick is based on a variable time-sliced scheduling that has a direct effect on CPU load, context switching and process waiting time.","PeriodicalId":117908,"journal":{"name":"2017 International Conference on Engineering & MIS (ICEMIS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133285420","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 : 2017-05-01DOI: 10.1109/ICEMIS.2017.8273107
S. Mehri, M. Hammami
Adipose tissue expresses all the renin-angiotensin system (RAS) components that play an important role in the adipogenesis, lipid and glucose metabolism regulation in an auto/paracrine manner. The classical RAS has been found to be over-activated during the adipose tissue enlargement, thus elevated Generation of Angiotensin II (Ang II) may contribute to the obesity pathogenesis. Obesity rates continue to increase worldwide. The question arises whether obesity is truly perceived as a risk factor and a disease. Then, the association between angiotensin converting enzyme (ACE) gene I/D polymorphism and the risk of overweight/obesity remains controversial. We investigated the possible relationship between ACE gene I/D polymorphism and obesity in Tunisian type 2 diabetes mellitus (T2DM) patients. In this study, obesity was defined as a body mass index (BMI) value ≥ 25 kg/m2 and subjects were classified into 4 groups (lean, normal, overweight, and obese). ACE genotyping was determined by PCR. Finding of 47.9% of hypertensives among the subjects having DD genotype and BMI ≥ 30 kg/m2 is consistent with an additive effect of DD genotype and obesity. In conclusion, the present study implies that genotyping of the ACE gene I/D polymorphism could in the future become an important part of the clinical process of risk identification for T2DM in Tunisian population.
{"title":"ACE gene I/D polymorphism and obesity in patients with type 2 diabetes mellitus","authors":"S. Mehri, M. Hammami","doi":"10.1109/ICEMIS.2017.8273107","DOIUrl":"https://doi.org/10.1109/ICEMIS.2017.8273107","url":null,"abstract":"Adipose tissue expresses all the renin-angiotensin system (RAS) components that play an important role in the adipogenesis, lipid and glucose metabolism regulation in an auto/paracrine manner. The classical RAS has been found to be over-activated during the adipose tissue enlargement, thus elevated Generation of Angiotensin II (Ang II) may contribute to the obesity pathogenesis. Obesity rates continue to increase worldwide. The question arises whether obesity is truly perceived as a risk factor and a disease. Then, the association between angiotensin converting enzyme (ACE) gene I/D polymorphism and the risk of overweight/obesity remains controversial. We investigated the possible relationship between ACE gene I/D polymorphism and obesity in Tunisian type 2 diabetes mellitus (T2DM) patients. In this study, obesity was defined as a body mass index (BMI) value ≥ 25 kg/m2 and subjects were classified into 4 groups (lean, normal, overweight, and obese). ACE genotyping was determined by PCR. Finding of 47.9% of hypertensives among the subjects having DD genotype and BMI ≥ 30 kg/m2 is consistent with an additive effect of DD genotype and obesity. In conclusion, the present study implies that genotyping of the ACE gene I/D polymorphism could in the future become an important part of the clinical process of risk identification for T2DM in Tunisian population.","PeriodicalId":117908,"journal":{"name":"2017 International Conference on Engineering & MIS (ICEMIS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133309476","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 : 2017-05-01DOI: 10.1109/ICEMIS.2017.8273051
H. Abdelali, R. Bedira, H. Trabelsi, A. Gharsallah
This paper presents an implementation of new compact substrate integrated waveguide (SIW) band pass filter (BPF) as a candidate for Wireless sensor network (WSN) applications. The proposed filter is working in UWB frequency and is constructed by three cavities. Two adjacent cavities connected with an iris located in the middle of the structure. While the third cavity is glued above as a superposed layer. In order to transfer the energy to the upper cavity, two symmetrical slots are etched in the top metal of the lower layer cavities. The simulation and performance evaluation have been performed by using the full-wave electromagnetic 3D simulator Ansys HFSS. In the same time, the proposed filter maintains low insertion loss approaching 0 dB as well as good matching since the return loss noted is under 15 dB over the pass band. Moreover, a generated transmission zero located under −15 dB close to the pass band with steep cut-off frequency response. Thus, to guarantee higher selectivity. Furthermore, the compact size of this filter make it suitable for easy integration in systems on chip for microwave circuits.
{"title":"Bandwidth enhancement of substrate integrated waveguide band pass filter for wireless sensor network applications","authors":"H. Abdelali, R. Bedira, H. Trabelsi, A. Gharsallah","doi":"10.1109/ICEMIS.2017.8273051","DOIUrl":"https://doi.org/10.1109/ICEMIS.2017.8273051","url":null,"abstract":"This paper presents an implementation of new compact substrate integrated waveguide (SIW) band pass filter (BPF) as a candidate for Wireless sensor network (WSN) applications. The proposed filter is working in UWB frequency and is constructed by three cavities. Two adjacent cavities connected with an iris located in the middle of the structure. While the third cavity is glued above as a superposed layer. In order to transfer the energy to the upper cavity, two symmetrical slots are etched in the top metal of the lower layer cavities. The simulation and performance evaluation have been performed by using the full-wave electromagnetic 3D simulator Ansys HFSS. In the same time, the proposed filter maintains low insertion loss approaching 0 dB as well as good matching since the return loss noted is under 15 dB over the pass band. Moreover, a generated transmission zero located under −15 dB close to the pass band with steep cut-off frequency response. Thus, to guarantee higher selectivity. Furthermore, the compact size of this filter make it suitable for easy integration in systems on chip for microwave circuits.","PeriodicalId":117908,"journal":{"name":"2017 International Conference on Engineering & MIS (ICEMIS)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125109501","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 : 2017-05-01DOI: 10.1109/ICEMIS.2017.8272993
Ali Lahouar, Amal Mejri, J. Slama
Load forecast is one of the most important tasks in modern and smart grids. With the integration of renewable intermittent sources and the adoption of demand response strategies, an accurate short-term prediction becomes mandatory. Modern forecast approaches do not merely estimate future values, but provide also confidence intervals with different widths and probabilities. Therefore, this paper proposes a probabilistic day-ahead load forecast approach based on quantile regression forests. Quantile regression forests are extensions to random forests that provide confidence intervals instead of single points. The forecaster inputs are chosen according to measures of correlation and importance, profile analysis and wavelet decomposition of load curves. Several tests are performed using real data sets from the Ontario market. The results reflect the accuracy and the effectiveness of the proposed model under different circumstances.
{"title":"Probabilistic day-ahead load forecast using quantile regression forests","authors":"Ali Lahouar, Amal Mejri, J. Slama","doi":"10.1109/ICEMIS.2017.8272993","DOIUrl":"https://doi.org/10.1109/ICEMIS.2017.8272993","url":null,"abstract":"Load forecast is one of the most important tasks in modern and smart grids. With the integration of renewable intermittent sources and the adoption of demand response strategies, an accurate short-term prediction becomes mandatory. Modern forecast approaches do not merely estimate future values, but provide also confidence intervals with different widths and probabilities. Therefore, this paper proposes a probabilistic day-ahead load forecast approach based on quantile regression forests. Quantile regression forests are extensions to random forests that provide confidence intervals instead of single points. The forecaster inputs are chosen according to measures of correlation and importance, profile analysis and wavelet decomposition of load curves. Several tests are performed using real data sets from the Ontario market. The results reflect the accuracy and the effectiveness of the proposed model under different circumstances.","PeriodicalId":117908,"journal":{"name":"2017 International Conference on Engineering & MIS (ICEMIS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123896272","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 : 2017-05-01DOI: 10.1109/ICEMIS.2017.8273079
Asma Bouhlel, A. Sakly, S. Ikki
Inspired by the high spectral efficiency improvement of the Spatial Modulation (SM), Orthogonal Frequency Division Multiplexing with Index Modulation (OFDM-IM) was recently proposed and expected to be one of the key technologies of 5G systems. This novel transmission technique incorporates the index of active subcarriers to convey additional information. Similar to conventional OFDM, channel estimation error is considered as a dominant performance degrading cause of OFDM-IM system. This paper deals with robust OFDM-IM system implementation under practical conditions. For this purpose, Discrete Wavelet Transform (DWT) based OFDM-IM is announced to improve the performance of the conventional OFDM-IM affected by non ideal channel estimation. To this purpose, DWT based OFDM-IM performance in terms of Bit Error Rate (BER) is compared to the original OFDM-IM based on Fast Fourier Transform (FFT) in the presence of channel estimation error. Simulation results are provided to prove the performance enhancement of our proposed system over Rayleigh fading channel.
{"title":"Performance analysis of DWT based OFDM with index modulation under channel estimation error","authors":"Asma Bouhlel, A. Sakly, S. Ikki","doi":"10.1109/ICEMIS.2017.8273079","DOIUrl":"https://doi.org/10.1109/ICEMIS.2017.8273079","url":null,"abstract":"Inspired by the high spectral efficiency improvement of the Spatial Modulation (SM), Orthogonal Frequency Division Multiplexing with Index Modulation (OFDM-IM) was recently proposed and expected to be one of the key technologies of 5G systems. This novel transmission technique incorporates the index of active subcarriers to convey additional information. Similar to conventional OFDM, channel estimation error is considered as a dominant performance degrading cause of OFDM-IM system. This paper deals with robust OFDM-IM system implementation under practical conditions. For this purpose, Discrete Wavelet Transform (DWT) based OFDM-IM is announced to improve the performance of the conventional OFDM-IM affected by non ideal channel estimation. To this purpose, DWT based OFDM-IM performance in terms of Bit Error Rate (BER) is compared to the original OFDM-IM based on Fast Fourier Transform (FFT) in the presence of channel estimation error. Simulation results are provided to prove the performance enhancement of our proposed system over Rayleigh fading channel.","PeriodicalId":117908,"journal":{"name":"2017 International Conference on Engineering & MIS (ICEMIS)","volume":"26 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120968097","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 : 2017-05-01DOI: 10.1109/ICEMIS.2017.8273102
M. Benabdeladhim, A. Fradi, B. Hamdi
This paper presents an Interconnect Built-In Self-Repair (IBISR) strategies for Through Silicon Via (TSV) in three dimension integrated circuits (3D-IC). The proposed IBISR structure focuses on testing of specific defective TSV by using Interconnect BIST methodology. After interconnect test, the result giving will be delivered to the BISR structure for repairing TSV defects. Additionally, a parallel processing approach is presented of the proposed IBISR structure to up grit speed of operations of test and repair. Experimental results demonstrate that the proposed IBISR scheme can achieve the good performance in repair rate and yield with little area overhead penalty.
{"title":"Interconnect BIST based new self-repairing of TSV defect in 3D-IC","authors":"M. Benabdeladhim, A. Fradi, B. Hamdi","doi":"10.1109/ICEMIS.2017.8273102","DOIUrl":"https://doi.org/10.1109/ICEMIS.2017.8273102","url":null,"abstract":"This paper presents an Interconnect Built-In Self-Repair (IBISR) strategies for Through Silicon Via (TSV) in three dimension integrated circuits (3D-IC). The proposed IBISR structure focuses on testing of specific defective TSV by using Interconnect BIST methodology. After interconnect test, the result giving will be delivered to the BISR structure for repairing TSV defects. Additionally, a parallel processing approach is presented of the proposed IBISR structure to up grit speed of operations of test and repair. Experimental results demonstrate that the proposed IBISR scheme can achieve the good performance in repair rate and yield with little area overhead penalty.","PeriodicalId":117908,"journal":{"name":"2017 International Conference on Engineering & MIS (ICEMIS)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121378844","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 : 2017-05-01DOI: 10.1109/ICEMIS.2017.8273058
Yassin Dhahri, S. Ghedira, R. Zrafi, K. Besbes
Integrated converters have a promising application for solar photovoltaic systems. These converters are highly recognized by its reduced sizes that benefit the direct attachment to each photovoltaic module. This paper presents a development of a non-isolated DC-DC converter topology for photovoltaic applications. A numerical simulation based on the 3D finite element method (3D FEM) of inductor has been performed since it represents a pivotal element with large dimension in DC-DC converters. The optimization of the electrical parameters values of the integrated inductor was carried out based on a numerical analysis of the geometric parameter influence on the electrical characteristics.
{"title":"Design of an integrated inductor in micro-converter DC-DC for photovoltaic applications","authors":"Yassin Dhahri, S. Ghedira, R. Zrafi, K. Besbes","doi":"10.1109/ICEMIS.2017.8273058","DOIUrl":"https://doi.org/10.1109/ICEMIS.2017.8273058","url":null,"abstract":"Integrated converters have a promising application for solar photovoltaic systems. These converters are highly recognized by its reduced sizes that benefit the direct attachment to each photovoltaic module. This paper presents a development of a non-isolated DC-DC converter topology for photovoltaic applications. A numerical simulation based on the 3D finite element method (3D FEM) of inductor has been performed since it represents a pivotal element with large dimension in DC-DC converters. The optimization of the electrical parameters values of the integrated inductor was carried out based on a numerical analysis of the geometric parameter influence on the electrical characteristics.","PeriodicalId":117908,"journal":{"name":"2017 International Conference on Engineering & MIS (ICEMIS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121159167","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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