This paper describes the implementation of Distributed Active Filters (DAFs). To share the worklo... more This paper describes the implementation of Distributed Active Filters (DAFs). To share the workload of harmonic filtering, several Active Filter Units (AFUs) are placed on different locations which can perform the harmonic filtering without a direct communication. Different configurations of DAFs are described and are implemented using MATLAB /Simpower system Toolbox environment to observe their performances and comparison.
Background: Vegeta on (food stuff) is grown in soil that contains many radioac ve elements such a... more Background: Vegeta on (food stuff) is grown in soil that contains many radioac ve elements such as 238 U (uranium), 232 Th (thorium) and 40 K (potassium), which may get deposited either due to radioac ve fallout or/and by absorp on from the soil and can pose serious health hazards. Materials and Methods: Natural radioac vity, radiological hazards and annual effec ve dose assessment was carried out in vegeta on samples (vegetables, cereals and fruits) collected from fields and market. Gamma spectrometry using HPGe detector was used. Results: The measured specific ac vity concentra on of 238 U (uranium), 232 Th (thorium) and 40 K (potassium) varied from 10.25 ± 0.94 Bq/kg to 29.13 ± 0.69 Bq/kg, 22.20 ± 2.46 Bq/kg to 58.21 ± 1.15 Bq/kg, and 1158.4 ± 26.05 Bq/kg to 1962.2 ± 18.17 Bq/kg respec vely in various vegetable and cereal samples and varied from 2.5 ± 0.16 Bq/kg to 9.8 ± 0.15 Bq/kg, 7.4 ± 1.24 Bq/kg to 18.4 ± 1.39 Bq/kg, and 287.13 ± 11.23 Bq/kg to 815.72 ± 12.50 Bq/kg respec vel...
Background: Natural radionuclides in rock samples, primarily 238 U (uranium), 232 Th (thorium) an... more Background: Natural radionuclides in rock samples, primarily 238 U (uranium), 232 Th (thorium) and 40 K (potassium), are the main source of radia on exposure to workers and general public and their measurement is of paramount importance from radia on protec on point of view. Materials and Methods: Gamma spectrometry using HPGe detector was used to measure the radioac vity and assess the radiological hazards and annual effec ve dose. The data is sta s cally significant. Results: In the studied rock samples, the mean ac vity of 238 U, 232 Th, 40 K is 12.15 ± 1.68 Bq/kg, 45.17 ± 6.92 Bq/kg and 639.24 ± 115.86 Bq/kg, respec vely. The mean values of radium equivalent ac vity, radiological hazards external hazard index (Hex), Internal hazard index (Hin), Gamma index (Iγ) and Alpha index (Iα) are 125.96 ± 14.94 Bq/kg, 0.34 ± 0.04, 0.37 ± 0.04, 0.48 ± 0.06 and 0.06 ± 0.00 respec vely. The mean values of absorbed dose rate, indoor and outdoor annual effec ve dose of gamma radia on are 59.55 ...
This paper deals with the implementation of new proposed strategy for the reduction in the transi... more This paper deals with the implementation of new proposed strategy for the reduction in the transient time of shunt active filter using intelligent controllers. Intelligent control is a class of control techniques that use various AI computing approaches like fuzzy logic, neural network, evolutionary computation, genetic algorithm etc. The proposed strategy works on the principle of energy of the capacitor to maintain the DClink voltage of shunt connected active filter and thus reduces the transient time whenever there is sudden change in the load. A comparison using the PI controller, Fuzzy logic controller and Artificial neural controller has been made using MATLAB Simulink Power System Toolbox.
In the present study, activity concentration and annual effective ingestion dose assessment was c... more In the present study, activity concentration and annual effective ingestion dose assessment was carried out in cereal samples using gamma spectrometry. In the studied samples the activity of 226Ra, 238U, 232Th, and 40K varied from 10.25±0.94 Bq/kg to 29.13±0.69 Bq/kg, 7.04±0.13 Bq/kg to 20.08±1.32 Bq/kg, 22.20±2.46 Bq/kg to 58.21±1.15 Bq/kg and 1158.4±26.05Bq/kg to 1962.2±18.17 Bq/kg with an average value of 20.06±4.82 Bq/kg, 13.08±1.31 Bq/kg, 41.53±3.77 Bq/kg, and 1639±75.55 Bq/kg respectively. The average value of annual effective ingestion dose from ingested food was 0.62±0.08 mSv/y, 0.07±0.006 mSv/y, 1.20±0.11 mSv/y, and 1.28±0.06 mSv/y from 226Ra, 238U, 232Th, and 40K, respectively. The average value of total ingestion dose and cancer risk was found to be 3.18±0.14 mSv/y and (79.5±3.55) × 10−4 respectively.
Polyimides and Other High Temperature Polymers: Synthesis, Characterization and Applications, Volume 5
Multiple Relaxation Processes in Swift Heavy Ion Irradiated Kapton-H Polyimide JK Quamara∗, Manee... more Multiple Relaxation Processes in Swift Heavy Ion Irradiated Kapton-H Polyimide JK Quamara∗, Maneesha Garg and Geetika Goyal Department of Physics, National ... The dipolar origin of this peak has been established by Bhardwaj et al.[12] owing to the facts:(i) peak current ...
2012 2nd International Conference on Power, Control and Embedded Systems, 2012
A new control strategy is proposed for power quality enhancement in the three phase three wire sy... more A new control strategy is proposed for power quality enhancement in the three phase three wire system. A fuzzy logic controller is integrated in Synchronous Reference Frame (SRF) topology to minimize the transient time of Active filter. The proposed algorithm evaluates energy of capacitor rather than voltage and analyzes a fast response. A comparison has been made to analyze the performance in transient time using conventional and proposed controller when there is abrupt fall in load. The model is developed using MATLAB / “SimPower Systems” Block library.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2006
High-energy ion irradiation effects on the thermally stimulated depolarization current (TSDC) beh... more High-energy ion irradiation effects on the thermally stimulated depolarization current (TSDC) behaviour of kapton-H samples (12.5μm) irradiated with 50MeV Li ion (fluence 5×104, 105 and 5×105 ions/cm2) have been investigated. The TSDC spectra of the irradiated samples reveal that the β-peak (appearing around 80–110°C) associated with dipolar relaxation has been significantly affected owing to the demerization of carbonyl groups due
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2001
High energy ion irradiation effects on the conduction behaviour of Kapton-H polyimide have been i... more High energy ion irradiation effects on the conduction behaviour of Kapton-H polyimide have been investigated. Kapton-H samples of 125 μm thickness were irradiated with 100 MeV Si+ beam for fluences 2.3×1011, 4.3×1011 and 1.15×1012ions/cm2 at Nuclear Science Center (PELLETRON FACILITY), New Delhi. Measurements under both transient and the steady state conditions at different temperatures were made at different electric fields
This paper describes the implementation of Distributed Active Filters (DAFs). To share the worklo... more This paper describes the implementation of Distributed Active Filters (DAFs). To share the workload of harmonic filtering, several Active Filter Units (AFUs) are placed on different locations which can perform the harmonic filtering without a direct communication. Different configurations of DAFs are described and are implemented using MATLAB /Simpower system Toolbox environment to observe their performances and comparison.
Background: Vegeta on (food stuff) is grown in soil that contains many radioac ve elements such a... more Background: Vegeta on (food stuff) is grown in soil that contains many radioac ve elements such as 238 U (uranium), 232 Th (thorium) and 40 K (potassium), which may get deposited either due to radioac ve fallout or/and by absorp on from the soil and can pose serious health hazards. Materials and Methods: Natural radioac vity, radiological hazards and annual effec ve dose assessment was carried out in vegeta on samples (vegetables, cereals and fruits) collected from fields and market. Gamma spectrometry using HPGe detector was used. Results: The measured specific ac vity concentra on of 238 U (uranium), 232 Th (thorium) and 40 K (potassium) varied from 10.25 ± 0.94 Bq/kg to 29.13 ± 0.69 Bq/kg, 22.20 ± 2.46 Bq/kg to 58.21 ± 1.15 Bq/kg, and 1158.4 ± 26.05 Bq/kg to 1962.2 ± 18.17 Bq/kg respec vely in various vegetable and cereal samples and varied from 2.5 ± 0.16 Bq/kg to 9.8 ± 0.15 Bq/kg, 7.4 ± 1.24 Bq/kg to 18.4 ± 1.39 Bq/kg, and 287.13 ± 11.23 Bq/kg to 815.72 ± 12.50 Bq/kg respec vel...
Background: Natural radionuclides in rock samples, primarily 238 U (uranium), 232 Th (thorium) an... more Background: Natural radionuclides in rock samples, primarily 238 U (uranium), 232 Th (thorium) and 40 K (potassium), are the main source of radia on exposure to workers and general public and their measurement is of paramount importance from radia on protec on point of view. Materials and Methods: Gamma spectrometry using HPGe detector was used to measure the radioac vity and assess the radiological hazards and annual effec ve dose. The data is sta s cally significant. Results: In the studied rock samples, the mean ac vity of 238 U, 232 Th, 40 K is 12.15 ± 1.68 Bq/kg, 45.17 ± 6.92 Bq/kg and 639.24 ± 115.86 Bq/kg, respec vely. The mean values of radium equivalent ac vity, radiological hazards external hazard index (Hex), Internal hazard index (Hin), Gamma index (Iγ) and Alpha index (Iα) are 125.96 ± 14.94 Bq/kg, 0.34 ± 0.04, 0.37 ± 0.04, 0.48 ± 0.06 and 0.06 ± 0.00 respec vely. The mean values of absorbed dose rate, indoor and outdoor annual effec ve dose of gamma radia on are 59.55 ...
This paper deals with the implementation of new proposed strategy for the reduction in the transi... more This paper deals with the implementation of new proposed strategy for the reduction in the transient time of shunt active filter using intelligent controllers. Intelligent control is a class of control techniques that use various AI computing approaches like fuzzy logic, neural network, evolutionary computation, genetic algorithm etc. The proposed strategy works on the principle of energy of the capacitor to maintain the DClink voltage of shunt connected active filter and thus reduces the transient time whenever there is sudden change in the load. A comparison using the PI controller, Fuzzy logic controller and Artificial neural controller has been made using MATLAB Simulink Power System Toolbox.
In the present study, activity concentration and annual effective ingestion dose assessment was c... more In the present study, activity concentration and annual effective ingestion dose assessment was carried out in cereal samples using gamma spectrometry. In the studied samples the activity of 226Ra, 238U, 232Th, and 40K varied from 10.25±0.94 Bq/kg to 29.13±0.69 Bq/kg, 7.04±0.13 Bq/kg to 20.08±1.32 Bq/kg, 22.20±2.46 Bq/kg to 58.21±1.15 Bq/kg and 1158.4±26.05Bq/kg to 1962.2±18.17 Bq/kg with an average value of 20.06±4.82 Bq/kg, 13.08±1.31 Bq/kg, 41.53±3.77 Bq/kg, and 1639±75.55 Bq/kg respectively. The average value of annual effective ingestion dose from ingested food was 0.62±0.08 mSv/y, 0.07±0.006 mSv/y, 1.20±0.11 mSv/y, and 1.28±0.06 mSv/y from 226Ra, 238U, 232Th, and 40K, respectively. The average value of total ingestion dose and cancer risk was found to be 3.18±0.14 mSv/y and (79.5±3.55) × 10−4 respectively.
Polyimides and Other High Temperature Polymers: Synthesis, Characterization and Applications, Volume 5
Multiple Relaxation Processes in Swift Heavy Ion Irradiated Kapton-H Polyimide JK Quamara∗, Manee... more Multiple Relaxation Processes in Swift Heavy Ion Irradiated Kapton-H Polyimide JK Quamara∗, Maneesha Garg and Geetika Goyal Department of Physics, National ... The dipolar origin of this peak has been established by Bhardwaj et al.[12] owing to the facts:(i) peak current ...
2012 2nd International Conference on Power, Control and Embedded Systems, 2012
A new control strategy is proposed for power quality enhancement in the three phase three wire sy... more A new control strategy is proposed for power quality enhancement in the three phase three wire system. A fuzzy logic controller is integrated in Synchronous Reference Frame (SRF) topology to minimize the transient time of Active filter. The proposed algorithm evaluates energy of capacitor rather than voltage and analyzes a fast response. A comparison has been made to analyze the performance in transient time using conventional and proposed controller when there is abrupt fall in load. The model is developed using MATLAB / “SimPower Systems” Block library.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2006
High-energy ion irradiation effects on the thermally stimulated depolarization current (TSDC) beh... more High-energy ion irradiation effects on the thermally stimulated depolarization current (TSDC) behaviour of kapton-H samples (12.5μm) irradiated with 50MeV Li ion (fluence 5×104, 105 and 5×105 ions/cm2) have been investigated. The TSDC spectra of the irradiated samples reveal that the β-peak (appearing around 80–110°C) associated with dipolar relaxation has been significantly affected owing to the demerization of carbonyl groups due
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2001
High energy ion irradiation effects on the conduction behaviour of Kapton-H polyimide have been i... more High energy ion irradiation effects on the conduction behaviour of Kapton-H polyimide have been investigated. Kapton-H samples of 125 μm thickness were irradiated with 100 MeV Si+ beam for fluences 2.3×1011, 4.3×1011 and 1.15×1012ions/cm2 at Nuclear Science Center (PELLETRON FACILITY), New Delhi. Measurements under both transient and the steady state conditions at different temperatures were made at different electric fields
Uploads
Papers by Maneesha Garg