Pub Date : 2015-11-01DOI: 10.1109/CCINTELS.2015.7437876
Dakshita, Gaurav Walia, Sushil Kumar
This paper presents multiband split ring fractal patch antenna. The proposed geometry is based on square ring in which a slit is inserted on one side and finally the sides are replaced with the Minkowski curve. The proposed geometry is simulated in HFSS using FR4 and RT Duroid as the substrate material. The 0th and 1st iterations of the design are compared minutely in terms of return loss, bandwidth, vswr and gain. The designs are showing multiband performance ranging between 5.4Ghz to 19.2 Ghz. There has been a considerable improvement in Gain by using RT duroid than FR4. In terms of size the patch area has been reduced to 49.78% and 72.52% when compared to simple rectangular patch using FR4 and RT Duroid respectively.
{"title":"Design and optimization of multiband split ring fractal patch antenna for wireless communication","authors":"Dakshita, Gaurav Walia, Sushil Kumar","doi":"10.1109/CCINTELS.2015.7437876","DOIUrl":"https://doi.org/10.1109/CCINTELS.2015.7437876","url":null,"abstract":"This paper presents multiband split ring fractal patch antenna. The proposed geometry is based on square ring in which a slit is inserted on one side and finally the sides are replaced with the Minkowski curve. The proposed geometry is simulated in HFSS using FR4 and RT Duroid as the substrate material. The 0th and 1st iterations of the design are compared minutely in terms of return loss, bandwidth, vswr and gain. The designs are showing multiband performance ranging between 5.4Ghz to 19.2 Ghz. There has been a considerable improvement in Gain by using RT duroid than FR4. In terms of size the patch area has been reduced to 49.78% and 72.52% when compared to simple rectangular patch using FR4 and RT Duroid respectively.","PeriodicalId":131816,"journal":{"name":"2015 Communication, Control and Intelligent Systems (CCIS)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122110933","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 : 2015-11-01DOI: 10.1109/CCINTELS.2015.7437894
Priya Rajput, M. Bhatnagar, J. P. Saini
A new concept of research is cooperative communication which is influencing technique to reduce fading in wireless relaying layout. Concerning with the fading issue, this paper focuses to giving a better non-orthogonal space-time block code (NOSTBC) scheme and assimilate it in cooperative relaying nodes for upgrading system performance. The Golden code proven to present a ranking performance in a Multiple-Input Multiple-Output (MIMO) scenario than any other code and been incorporated in IEEE 802.16 standards as a full rate and full diversity space-time code. At the receiver, maximum likelihood (ML) detection of different symbol is attained by decoupling of signal transmit from various antenna instead of joint detection. This paper of multi-hop wireless relay network consisting of source, relay and destination each equipped with two antennas have been taken into account using decode-and-forward cooperative protocol strategy in relay nodes. The simulation results support the effectiveness of the proposed scheme by offering better symbol error rate performance and increased spectral efficiency than other codes.
{"title":"Analysis of Golden code in multi-hop relay network","authors":"Priya Rajput, M. Bhatnagar, J. P. Saini","doi":"10.1109/CCINTELS.2015.7437894","DOIUrl":"https://doi.org/10.1109/CCINTELS.2015.7437894","url":null,"abstract":"A new concept of research is cooperative communication which is influencing technique to reduce fading in wireless relaying layout. Concerning with the fading issue, this paper focuses to giving a better non-orthogonal space-time block code (NOSTBC) scheme and assimilate it in cooperative relaying nodes for upgrading system performance. The Golden code proven to present a ranking performance in a Multiple-Input Multiple-Output (MIMO) scenario than any other code and been incorporated in IEEE 802.16 standards as a full rate and full diversity space-time code. At the receiver, maximum likelihood (ML) detection of different symbol is attained by decoupling of signal transmit from various antenna instead of joint detection. This paper of multi-hop wireless relay network consisting of source, relay and destination each equipped with two antennas have been taken into account using decode-and-forward cooperative protocol strategy in relay nodes. The simulation results support the effectiveness of the proposed scheme by offering better symbol error rate performance and increased spectral efficiency than other codes.","PeriodicalId":131816,"journal":{"name":"2015 Communication, Control and Intelligent Systems (CCIS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130431917","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 : 2015-11-01DOI: 10.1109/CCINTELS.2015.7437929
B. Nayak, Subrat Kumar, S. Dash
This paper addresses the dynamic modeling of buck dc-dc converter with separately excited dc motor load by average state-space analysis method. Based on these models, the speed of the machine is controlled using direct measurement of speed. Inductor value is calculated based on switching frequency to limit the current and torque ripple. Dynamic behavior is improved by designing the proper phase lead compensator using bode diagram, instead of PI controller. Hysteresis band controller and peak current controller are used for inner current loop for controlling the duty ratio of the switch. Performances of both hysteresis band controller and peak current controller are verified by MATLAB Simulation.
{"title":"Design of phase lead compensator for buck converter fed adjustable speed drive","authors":"B. Nayak, Subrat Kumar, S. Dash","doi":"10.1109/CCINTELS.2015.7437929","DOIUrl":"https://doi.org/10.1109/CCINTELS.2015.7437929","url":null,"abstract":"This paper addresses the dynamic modeling of buck dc-dc converter with separately excited dc motor load by average state-space analysis method. Based on these models, the speed of the machine is controlled using direct measurement of speed. Inductor value is calculated based on switching frequency to limit the current and torque ripple. Dynamic behavior is improved by designing the proper phase lead compensator using bode diagram, instead of PI controller. Hysteresis band controller and peak current controller are used for inner current loop for controlling the duty ratio of the switch. Performances of both hysteresis band controller and peak current controller are verified by MATLAB Simulation.","PeriodicalId":131816,"journal":{"name":"2015 Communication, Control and Intelligent Systems (CCIS)","volume":"87 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120965882","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 : 2015-11-01DOI: 10.1109/CCINTELS.2015.7437933
Jeetendra Agarwal, Aditi Vidyarthi, G. Parmar
The steam generator water level is an important process parameter in nuclear power stations. It is essential to provide continuous heat sink to reactor through primary heat transport system and to ensure reactor safety. While on power or during reactor shutdown, the level control system removes the decay heat from the reactor core via boiler. At low reactor power the level control is very much difficult due to unreliable flow measurement and non-minimum phase characteristics. In order to overcome shortcomings of the PID controller, a fuzzy controller has been proposed by using the experiences of plant operators. In this work, a novel concept of Linear Quadratic Regulator (LQR) control is proposed to achieve efficient control. A simulation model for steam generator in nuclear power plant as an example has been given to verify the effectiveness of fuzzy and LQR controller.
{"title":"Comparative analysis of fuzzy and LQR for water level control of U-tube steam generator","authors":"Jeetendra Agarwal, Aditi Vidyarthi, G. Parmar","doi":"10.1109/CCINTELS.2015.7437933","DOIUrl":"https://doi.org/10.1109/CCINTELS.2015.7437933","url":null,"abstract":"The steam generator water level is an important process parameter in nuclear power stations. It is essential to provide continuous heat sink to reactor through primary heat transport system and to ensure reactor safety. While on power or during reactor shutdown, the level control system removes the decay heat from the reactor core via boiler. At low reactor power the level control is very much difficult due to unreliable flow measurement and non-minimum phase characteristics. In order to overcome shortcomings of the PID controller, a fuzzy controller has been proposed by using the experiences of plant operators. In this work, a novel concept of Linear Quadratic Regulator (LQR) control is proposed to achieve efficient control. A simulation model for steam generator in nuclear power plant as an example has been given to verify the effectiveness of fuzzy and LQR controller.","PeriodicalId":131816,"journal":{"name":"2015 Communication, Control and Intelligent Systems (CCIS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120998633","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 : 2015-11-01DOI: 10.1109/CCINTELS.2015.7437865
D. Meena, R. Meena
A novel gain and directivity enhancement of microstrip patch array antenna with metallic ring is presented here for WLAN/Wi-Fi application. U-slot technique is used to achieve the necessary impedance transformation at preferred frequency. The designs have array and metallic ring coplanar to radiation patch to enhance the gain. The topology of the structure is dissimilar from conventional microstrip patch antenna. The structure present on the Rogers RO 4003; Using CST Microwave studio is designed & simulated. The simulated return loss is greater than 10 dB at center frequencies 5.9 GHz and 5.96 GHz. The results of microstrip patch antenna with array and metallic ring are simulated. In that microstrip patch antenna array design the improvement to gain and directivity of microstrip patch antenna with reference to 150% dB and 157.89% dBi frequencies as compared to conventional one. Using metallic ring around the patch on dielectric substrate realize gain enhancement and improved return loss. The substrate height is 1.3 mm and dielectric constant is 6.15.
{"title":"Gain and directivity enhancement of microstrip patch array antenna with metallic ring for WLAN/Wi-Fi applications","authors":"D. Meena, R. Meena","doi":"10.1109/CCINTELS.2015.7437865","DOIUrl":"https://doi.org/10.1109/CCINTELS.2015.7437865","url":null,"abstract":"A novel gain and directivity enhancement of microstrip patch array antenna with metallic ring is presented here for WLAN/Wi-Fi application. U-slot technique is used to achieve the necessary impedance transformation at preferred frequency. The designs have array and metallic ring coplanar to radiation patch to enhance the gain. The topology of the structure is dissimilar from conventional microstrip patch antenna. The structure present on the Rogers RO 4003; Using CST Microwave studio is designed & simulated. The simulated return loss is greater than 10 dB at center frequencies 5.9 GHz and 5.96 GHz. The results of microstrip patch antenna with array and metallic ring are simulated. In that microstrip patch antenna array design the improvement to gain and directivity of microstrip patch antenna with reference to 150% dB and 157.89% dBi frequencies as compared to conventional one. Using metallic ring around the patch on dielectric substrate realize gain enhancement and improved return loss. The substrate height is 1.3 mm and dielectric constant is 6.15.","PeriodicalId":131816,"journal":{"name":"2015 Communication, Control and Intelligent Systems (CCIS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114386309","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 : 2015-11-01DOI: 10.1109/CCINTELS.2015.7437927
Amit Karande, M. Nigam, V. Kadam
In power plants a control system is designed to stabilize output frequency and output electrical voltages in presence of variable power demand which acts as disturbance in transmission and distribution system. In this paper, Fuzzy PID is designed for MontazerGhaem power plant gas turbine (GE9001E).While designing, the identified model (linear) is correlated through fuel flow with the aim of controlling rotor speed of turbine during startup and power demand variation. The simulation results obtained through MATLAB Simulink shows that proposed fuzzy PID controller gives better transient response than PID controller while maintaining desired rotor speed of turbine.
{"title":"Design of a Fuzzy PID controller for a gas turbine power plant","authors":"Amit Karande, M. Nigam, V. Kadam","doi":"10.1109/CCINTELS.2015.7437927","DOIUrl":"https://doi.org/10.1109/CCINTELS.2015.7437927","url":null,"abstract":"In power plants a control system is designed to stabilize output frequency and output electrical voltages in presence of variable power demand which acts as disturbance in transmission and distribution system. In this paper, Fuzzy PID is designed for MontazerGhaem power plant gas turbine (GE9001E).While designing, the identified model (linear) is correlated through fuel flow with the aim of controlling rotor speed of turbine during startup and power demand variation. The simulation results obtained through MATLAB Simulink shows that proposed fuzzy PID controller gives better transient response than PID controller while maintaining desired rotor speed of turbine.","PeriodicalId":131816,"journal":{"name":"2015 Communication, Control and Intelligent Systems (CCIS)","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132220246","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 : 2015-11-01DOI: 10.1109/CCINTELS.2015.7437966
Sarika Shrivastava, A. Tripathi, K. S. Verma
Multi level inverter technology is being incorporated in various renewable energy based power generation technologies like wind and solar for higher voltage and power applications. Doubly fed induction generator (DFIG) based wind energy conversion systems is the leading technology in wind power market as they tender a variable speed, economically feasible and efficient substitute to the fossil fuel. The present paper comprises of a wind energy conversion system which is simulated using two-level pulse width modulation (PWM) converter as well as three level PWM converter. The performance of DFIG is compared using these technologies under normal and fault conditions. It is observed that multi-level inverters generate purer sinusoidal voltage with reduced total harmonic distortion thus bringing an upgrading in the quality of power produced by DFIG.
{"title":"Reduction in total harmonic distortion by implementing multi-level inverter technology in grid integrated DFIG","authors":"Sarika Shrivastava, A. Tripathi, K. S. Verma","doi":"10.1109/CCINTELS.2015.7437966","DOIUrl":"https://doi.org/10.1109/CCINTELS.2015.7437966","url":null,"abstract":"Multi level inverter technology is being incorporated in various renewable energy based power generation technologies like wind and solar for higher voltage and power applications. Doubly fed induction generator (DFIG) based wind energy conversion systems is the leading technology in wind power market as they tender a variable speed, economically feasible and efficient substitute to the fossil fuel. The present paper comprises of a wind energy conversion system which is simulated using two-level pulse width modulation (PWM) converter as well as three level PWM converter. The performance of DFIG is compared using these technologies under normal and fault conditions. It is observed that multi-level inverters generate purer sinusoidal voltage with reduced total harmonic distortion thus bringing an upgrading in the quality of power produced by DFIG.","PeriodicalId":131816,"journal":{"name":"2015 Communication, Control and Intelligent Systems (CCIS)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126093239","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 : 2015-11-01DOI: 10.1109/CCINTELS.2015.7437957
T. Anand, Rekha Pal, S. Dubey
As big data computing is in emergence, therefore handling of large amount of data becoming a problematic day by day. Analyzing, visualizing, and managing this massive amount of data causing remarkable issues and challenges which are not even resolve through traditional technologies. Therefore it requires innovative technologies or methods to resolve issues and challenges. The main aim of this paper is to explore the effectiveness of combination of big data with soft computing to overcome the issues and challenges more efficiently and in less time. Here emphasis is given on three main soft computing techniques namely neural network, fuzzy logic and genetic for minimizing big data related problems. Research questions are also formed for this purpose in the present paper from 2004-2015 as primary study that will help the researchers in future in their related study.
{"title":"Analytical approach of soft computing in big data issues","authors":"T. Anand, Rekha Pal, S. Dubey","doi":"10.1109/CCINTELS.2015.7437957","DOIUrl":"https://doi.org/10.1109/CCINTELS.2015.7437957","url":null,"abstract":"As big data computing is in emergence, therefore handling of large amount of data becoming a problematic day by day. Analyzing, visualizing, and managing this massive amount of data causing remarkable issues and challenges which are not even resolve through traditional technologies. Therefore it requires innovative technologies or methods to resolve issues and challenges. The main aim of this paper is to explore the effectiveness of combination of big data with soft computing to overcome the issues and challenges more efficiently and in less time. Here emphasis is given on three main soft computing techniques namely neural network, fuzzy logic and genetic for minimizing big data related problems. Research questions are also formed for this purpose in the present paper from 2004-2015 as primary study that will help the researchers in future in their related study.","PeriodicalId":131816,"journal":{"name":"2015 Communication, Control and Intelligent Systems (CCIS)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115861906","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 : 2015-11-01DOI: 10.1109/CCINTELS.2015.7437921
A. Sharma, Sanjeev Kumar, Amod Kumar
A master-slave robotic system with haptic feedback has been proposed by the authors for proving the force feedback principle during the execution of motion transfer from master side to slave side. The focus is on designing an appropriate mechanical structure for proper implementation of the force feedback principle and takes care about the stability of the overall control system. The proposed configuration with force feedback capability uses the current sensing technique for measuring the force acting on the slave side and implements the same on the master side. The technique has a wide application, with accuracy, efficiency, safety and over all user experience that provide superior performance and reliability in master- slave robot assisted interventions.
{"title":"Implementation of force feedback (haptic) in master slave robotic configuration","authors":"A. Sharma, Sanjeev Kumar, Amod Kumar","doi":"10.1109/CCINTELS.2015.7437921","DOIUrl":"https://doi.org/10.1109/CCINTELS.2015.7437921","url":null,"abstract":"A master-slave robotic system with haptic feedback has been proposed by the authors for proving the force feedback principle during the execution of motion transfer from master side to slave side. The focus is on designing an appropriate mechanical structure for proper implementation of the force feedback principle and takes care about the stability of the overall control system. The proposed configuration with force feedback capability uses the current sensing technique for measuring the force acting on the slave side and implements the same on the master side. The technique has a wide application, with accuracy, efficiency, safety and over all user experience that provide superior performance and reliability in master- slave robot assisted interventions.","PeriodicalId":131816,"journal":{"name":"2015 Communication, Control and Intelligent Systems (CCIS)","volume":"133 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130929915","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 : 2015-11-01DOI: 10.1109/CCINTELS.2015.7437919
Purnima K. Sharma, P. C. Sau, D. Sharma
The expansion of the Internet in the past years has rapidly enlarged the accessibility of digital data like digital audio, images and videos to the common community of people. The rapid development in information technologies has given an extended and easy access to digital data. Digital data is a major trend of business communication today. Therefore, copyright protection of digital data has been a significant research issue of information security. Digital watermarking is one of the proposed solutions for copyright protection of multimedia and it is becoming a major player not only for use in images but also in the latest technology such as audio, image and video. It also has applications in defense, certification of business documents, distribution, anti-forgery of the digital media. It is an important area of study in information hiding and retrieval. The secrecy of the image may be adjusted using the level indicator (LI) introduced in this paper. Comparison of different watermarking techniques for various LI values is accomplished in this paper to test robustness.
{"title":"Digital image watermarking: An approach by different transforms using level indicator","authors":"Purnima K. Sharma, P. C. Sau, D. Sharma","doi":"10.1109/CCINTELS.2015.7437919","DOIUrl":"https://doi.org/10.1109/CCINTELS.2015.7437919","url":null,"abstract":"The expansion of the Internet in the past years has rapidly enlarged the accessibility of digital data like digital audio, images and videos to the common community of people. The rapid development in information technologies has given an extended and easy access to digital data. Digital data is a major trend of business communication today. Therefore, copyright protection of digital data has been a significant research issue of information security. Digital watermarking is one of the proposed solutions for copyright protection of multimedia and it is becoming a major player not only for use in images but also in the latest technology such as audio, image and video. It also has applications in defense, certification of business documents, distribution, anti-forgery of the digital media. It is an important area of study in information hiding and retrieval. The secrecy of the image may be adjusted using the level indicator (LI) introduced in this paper. Comparison of different watermarking techniques for various LI values is accomplished in this paper to test robustness.","PeriodicalId":131816,"journal":{"name":"2015 Communication, Control and Intelligent Systems (CCIS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122142585","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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