Abhishek Mallick | West Bengal State University (original) (raw)
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Papers by Abhishek Mallick
Neural Computing and Applications, 2018
In these days, energy, water, fossil fuel restrictions and greenhouse gas emission have become th... more In these days, energy, water, fossil fuel restrictions and greenhouse gas emission have become the mutual problem of all countries. The application of hydro turbines, especially pumps as turbines in water distribution network, can be a great solution to these problems. In this research study, it is aimed to introduce a procedure for obtaining the optimum position of a pump as turbine in water distribution network. For this purpose, two objective functions are considered, namely power and up surge ratio. The reason of selecting the power is to maximize the energy production and minimize the payback period, and the reason of selecting the upsurge ratio is to minimize the initial costs and network risks. In the proposed methodology, a transient analysis database is being combined with optimization algorithms. In this research study, Bently hammer software has been used for generating the mentioned database. Ant colony optimization algorithm has been used for obtaining the discrete variable and three other heuristic algorithms, namely grey wolf optimizer, whale optimization algorithm and ion motion algorithm were used for finding the best continuous variable. Pipe number and the position of hydro turbine on the pipe were considered as the discrete and continuous variables, respectively. The proposed methodology was tested on a network in Palermo which data were available. The results indicated that the proposed methodology can suggest the best 6 pipes among 70 pipes of network and also the accurate position of the turbine on the pipe.
AIMS Biophysics, 2023
Accurate extraction of Cole parameters for applications in bioimpedance spectroscopy (BIS) is cha... more Accurate extraction of Cole parameters for applications in bioimpedance spectroscopy (BIS) is challenging. Precise estimation of Cole parameters from measured bioimpedance data is crucial, since the physiological state of any biological tissue or body is described in terms of Cole parameters. To extract Cole parameters from measured bioimpedance data, the conventional gradient-based nonlinear least square (NLS) optimization algorithm is found to be significantly inaccurate. In this work, we have presented a robust methodology to establish an accurate process to estimate Cole parameters and relaxation time from measured BIS data. Six nature inspired algorithms, along with NLS are implemented and studied. Experiments are conducted to obtain BIS data and analysis of variation (ANOVA) is performed. The Cuckoo Search (CS) algorithm achieved a better fitment result and is also able to extract the Cole parameters most accurately among all the algorithms under consideration. The ANOVA result shows that CS algorithm achieved a higher confidence rate. In addition, the CS algorithm requires less sample size compared to other algorithms for distinguishing the change in physical properties of a biological body.
Physics Education, 2022
A linear variable differential transformer is termed as LVDT in short. A simple miniature and ine... more A linear variable differential transformer is termed as LVDT in short. A simple miniature and inexpensive LVDT was constructed for laboratory teaching. Starting from the fundamental physics of LVDT, a complete demonstration was presented. The heart of an LVDT is three coils that were taken from the electrical ‘Ding-dong’ doorbell. A universal laboratory experiment kit named ‘ExpEyes-17’ is used to drive the LVDT and display the input and output signals on a laptop screen. Thus, a compact LVDT system was developed. Displacement experiments were conducted, and the well-known V-shape response for our LVDT was obtained. The theory and experiment were presented with a high degree of clarity for ease of understanding. A complete demonstration was given to a group of students while teaching the theory of LVDT, and an excellent response from the group was obtained. Moreover, online demonstration of LVDT experiments using our kit was easily achievable. The authors have used the setup for rem...
American Journal of Physics, 2018
The beauty of a diode lies in its voltage-dependent nonlinear resistance. The voltage on a chargi... more The beauty of a diode lies in its voltage-dependent nonlinear resistance. The voltage on a charging and discharging capacitor through a reverse-biased diode is calculated from basic equations and is found to be in good agreement with experimental measurements. Instead of the exponential dependence of charging and discharging voltages with time for a resistor-capacitor circuit, a linear time dependence is found when the resistor is replaced by a reverse-biased diode. Thus, well controlled positive and negative ramp voltages are obtained from the charging and discharging diode-capacitor circuits. This experiment can readily be performed in an introductory physics and electronics laboratory.The beauty of a diode lies in its voltage-dependent nonlinear resistance. The voltage on a charging and discharging capacitor through a reverse-biased diode is calculated from basic equations and is found to be in good agreement with experimental measurements. Instead of the exponential dependence o...
2019 International Conference on Ubiquitous and Emerging Concepts on Sensors and Transducers (UEMCOS), 2019
Identifying abnormality or diseases in tissue or organ by means of bioimpedance measurement is ch... more Identifying abnormality or diseases in tissue or organ by means of bioimpedance measurement is challenging though it is a novel application of bioimpedance measurement. In the identifying process, it is extremely important to standardize the measurement and to identify the bioimpedance parameters which are unique to a particular tissue. The set of unique bioimpedance parameters is used to characterize the given tissue. The unique parameters should be independent of position or coordinate of the tissue. For example, the characterizing parameters of an apple tissue should be independent of the measurement position of the apple. Cole bioimpedance parameters along with few derived parameters from Cole parameters are investigated in this work. Applying ANOVA on the boimpedance parameters, unique bioimpedance parameters are identified for characterizing tissue of apple. The capability of the identified impedance parameters to distinguish different species of apple is shown. This verificat...
2019 International Conference on Ubiquitous and Emerging Concepts on Sensors and Transducers (UEMCOS), 2019
Measurement of frequency of ambient vibration, especially at low range is challenging.From practi... more Measurement of frequency of ambient vibration, especially at low range is challenging.From practical point of view,the sensing of frequency of ambient vibration below 70 Hz is extremely important for real applications. Unfortunately, the amplitude of the source of vibration is extremely small at low range of vibration frequencies and thus possesses additional challenge in the measurement. Two types of mass loaded PVDF piezofilm sensors are used to capture minute vibration with a special arrangement of the sensors for better efficiency. A signal conditioning circuit consisting of a buffer and comparator is investigated for processing the analog output from the active sensors. An artificial vibrator is used to simulate the ambient vibration and the frequency of which is measured by means of optical sensor independently. The output signals from the signal conditioning circuit and optical sensor are compared to measure the frequency of vibration of the source. It is found that at the ve...
AIMS Biophysics, 2020
It is difficult to apply bioimpedance technique to discriminate plant tissues due to the large va... more It is difficult to apply bioimpedance technique to discriminate plant tissues due to the large variability of Cole parameters. A novel electronic method for characterizing tissue of fruit or vegetable with discrimination capability is presented. A specially designed electrode-pair is used to measure the bioimpedance and Cole parameters are extracted. The relaxation time which is a fundamental property of a given tissue is then estimated and analysis of variance is performed to gain statistical relevance. Bioimpedance is measured for apple and potato tissues in the frequency range of 1 Hz to 1 MHz and rigorous data analyses are performed. With 99% confidence, it is shown than the relaxation time is independent of position of measurement and is specific for a given fruit or vegetable. Further, the tissues of different species of a given fruit (or vegetable) is shown to be discriminated statistically at the confidence level of 98%. An excellent correlation is shown between the bioimpedance parameters and the parameters of cellular structure. Experimental data shows that our technique can be generalized to distinguish unhealthy or treated fruits (or vegetables) and therefore bearing immense applicability in the characterization of plant tissue.
2018 IEEE Electron Devices Kolkata Conference (EDKCON)
Harnessing and usability of electrical energy from piezofilm-based energy harvester is investigat... more Harnessing and usability of electrical energy from piezofilm-based energy harvester is investigated. Three possible combinations such as parallel, series-parallel and series configurations of piezofilms are investigated for load carrying capability. A total of six mass loaded piezofilms are employed in this study. An artificial vibrator is used to simulate the ambient vibration to generate electrical energy from the piezofilms. A commercial passive converter is used to convert generated ac power into usable dc power. Load characteristics are obtained at different vibrating frequency for all the three configurations. Among these three configurations, experimentally it is found the parallel combination of the piezofilms is the best configuration as far power generation capability is concerned, even at low vibrating frequency. It is also noticed that, the peak power is obtained at almost equal load for the first two configurations while the same is found to be at larger load resistance for the last configuration. The possible reasons for differences in the load characteristics of the three configurations are discussed.
AIMS Biophysics, 2020
It is difficult to apply bioimpedance technique to discriminate plant tissues due to the large va... more It is difficult to apply bioimpedance technique to discriminate plant tissues due to the large variability of Cole parameters. A novel electronic method for characterizing tissue of fruit or vegetable with discrimination capability is presented. A specially designed electrode-pair is used to measure the bioimpedance and Cole parameters are extracted. The relaxation time which is a fundamental property of a given tissue is then estimated and analysis of variance is performed to gain statistical relevance. Bioimpedance is measured for apple and potato tissues in the frequency range of 1 Hz to 1 MHz and rigorous data analyses are performed. With 99% confidence, it is shown than the relaxation time is independent of position of measurement and is specific for a given fruit or vegetable. Further, the tissues of different species of a given fruit (or vegetable) is shown to be discriminated statistically at the confidence level of 98%. An excellent correlation is shown between the bioimpedance parameters and the parameters of cellular structure. Experimental data shows that our technique can be generalized to distinguish unhealthy or treated fruits (or vegetables) and therefore bearing immense applicability in the characterization of plant tissue.
INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH, 2020
Usable electrical energy harvesting from mechanical vibration is novel for operating low-power re... more Usable electrical energy harvesting from mechanical vibration is novel for operating low-power remote devices. Two different mass loaded cantilever type piezofilms (commonly used as piezo sensor) are considered in this investigation to convert mechanical vibration into electrical energy. An artificial vibrator is fabricated to simulate the ambient vibration. The ac power generated by the piezofilms is converted by a commercial passive converter to obtain usable dc power. A total of eight experiments are c onducted and we found that in the regime of ambient vibration (<100 Hz), the piezofilms of lower area with lower resonant frequency can provide higher power. Further, when energy harvester contains mult iple piezofilms, better performance is obtained for homogeneous films in contrast to the heterogeneous films. Study on load characteristics reveals that parallel combination of films generates highest power, signifying that a vibrating piezofilm acts as a current source. In our study, peak power is obtained for a load resistance of 480 kΩ, signifying a better current driving capability of the harvester. The peak power is found to be highly nonlinear with the vibrating frequency and is found to be maximum around the vibrating frequency of 59 Hz. In addition, electrical power delivered to the resistive load per unit area of the film is found to be as high as 1.43 µW/cm 2 and it is much higher than the similar reported harvesters.
Neural Computing and Applications, 2018
In these days, energy, water, fossil fuel restrictions and greenhouse gas emission have become th... more In these days, energy, water, fossil fuel restrictions and greenhouse gas emission have become the mutual problem of all countries. The application of hydro turbines, especially pumps as turbines in water distribution network, can be a great solution to these problems. In this research study, it is aimed to introduce a procedure for obtaining the optimum position of a pump as turbine in water distribution network. For this purpose, two objective functions are considered, namely power and up surge ratio. The reason of selecting the power is to maximize the energy production and minimize the payback period, and the reason of selecting the upsurge ratio is to minimize the initial costs and network risks. In the proposed methodology, a transient analysis database is being combined with optimization algorithms. In this research study, Bently hammer software has been used for generating the mentioned database. Ant colony optimization algorithm has been used for obtaining the discrete variable and three other heuristic algorithms, namely grey wolf optimizer, whale optimization algorithm and ion motion algorithm were used for finding the best continuous variable. Pipe number and the position of hydro turbine on the pipe were considered as the discrete and continuous variables, respectively. The proposed methodology was tested on a network in Palermo which data were available. The results indicated that the proposed methodology can suggest the best 6 pipes among 70 pipes of network and also the accurate position of the turbine on the pipe.
AIMS Biophysics, 2023
Accurate extraction of Cole parameters for applications in bioimpedance spectroscopy (BIS) is cha... more Accurate extraction of Cole parameters for applications in bioimpedance spectroscopy (BIS) is challenging. Precise estimation of Cole parameters from measured bioimpedance data is crucial, since the physiological state of any biological tissue or body is described in terms of Cole parameters. To extract Cole parameters from measured bioimpedance data, the conventional gradient-based nonlinear least square (NLS) optimization algorithm is found to be significantly inaccurate. In this work, we have presented a robust methodology to establish an accurate process to estimate Cole parameters and relaxation time from measured BIS data. Six nature inspired algorithms, along with NLS are implemented and studied. Experiments are conducted to obtain BIS data and analysis of variation (ANOVA) is performed. The Cuckoo Search (CS) algorithm achieved a better fitment result and is also able to extract the Cole parameters most accurately among all the algorithms under consideration. The ANOVA result shows that CS algorithm achieved a higher confidence rate. In addition, the CS algorithm requires less sample size compared to other algorithms for distinguishing the change in physical properties of a biological body.
Physics Education, 2022
A linear variable differential transformer is termed as LVDT in short. A simple miniature and ine... more A linear variable differential transformer is termed as LVDT in short. A simple miniature and inexpensive LVDT was constructed for laboratory teaching. Starting from the fundamental physics of LVDT, a complete demonstration was presented. The heart of an LVDT is three coils that were taken from the electrical ‘Ding-dong’ doorbell. A universal laboratory experiment kit named ‘ExpEyes-17’ is used to drive the LVDT and display the input and output signals on a laptop screen. Thus, a compact LVDT system was developed. Displacement experiments were conducted, and the well-known V-shape response for our LVDT was obtained. The theory and experiment were presented with a high degree of clarity for ease of understanding. A complete demonstration was given to a group of students while teaching the theory of LVDT, and an excellent response from the group was obtained. Moreover, online demonstration of LVDT experiments using our kit was easily achievable. The authors have used the setup for rem...
American Journal of Physics, 2018
The beauty of a diode lies in its voltage-dependent nonlinear resistance. The voltage on a chargi... more The beauty of a diode lies in its voltage-dependent nonlinear resistance. The voltage on a charging and discharging capacitor through a reverse-biased diode is calculated from basic equations and is found to be in good agreement with experimental measurements. Instead of the exponential dependence of charging and discharging voltages with time for a resistor-capacitor circuit, a linear time dependence is found when the resistor is replaced by a reverse-biased diode. Thus, well controlled positive and negative ramp voltages are obtained from the charging and discharging diode-capacitor circuits. This experiment can readily be performed in an introductory physics and electronics laboratory.The beauty of a diode lies in its voltage-dependent nonlinear resistance. The voltage on a charging and discharging capacitor through a reverse-biased diode is calculated from basic equations and is found to be in good agreement with experimental measurements. Instead of the exponential dependence o...
2019 International Conference on Ubiquitous and Emerging Concepts on Sensors and Transducers (UEMCOS), 2019
Identifying abnormality or diseases in tissue or organ by means of bioimpedance measurement is ch... more Identifying abnormality or diseases in tissue or organ by means of bioimpedance measurement is challenging though it is a novel application of bioimpedance measurement. In the identifying process, it is extremely important to standardize the measurement and to identify the bioimpedance parameters which are unique to a particular tissue. The set of unique bioimpedance parameters is used to characterize the given tissue. The unique parameters should be independent of position or coordinate of the tissue. For example, the characterizing parameters of an apple tissue should be independent of the measurement position of the apple. Cole bioimpedance parameters along with few derived parameters from Cole parameters are investigated in this work. Applying ANOVA on the boimpedance parameters, unique bioimpedance parameters are identified for characterizing tissue of apple. The capability of the identified impedance parameters to distinguish different species of apple is shown. This verificat...
2019 International Conference on Ubiquitous and Emerging Concepts on Sensors and Transducers (UEMCOS), 2019
Measurement of frequency of ambient vibration, especially at low range is challenging.From practi... more Measurement of frequency of ambient vibration, especially at low range is challenging.From practical point of view,the sensing of frequency of ambient vibration below 70 Hz is extremely important for real applications. Unfortunately, the amplitude of the source of vibration is extremely small at low range of vibration frequencies and thus possesses additional challenge in the measurement. Two types of mass loaded PVDF piezofilm sensors are used to capture minute vibration with a special arrangement of the sensors for better efficiency. A signal conditioning circuit consisting of a buffer and comparator is investigated for processing the analog output from the active sensors. An artificial vibrator is used to simulate the ambient vibration and the frequency of which is measured by means of optical sensor independently. The output signals from the signal conditioning circuit and optical sensor are compared to measure the frequency of vibration of the source. It is found that at the ve...
AIMS Biophysics, 2020
It is difficult to apply bioimpedance technique to discriminate plant tissues due to the large va... more It is difficult to apply bioimpedance technique to discriminate plant tissues due to the large variability of Cole parameters. A novel electronic method for characterizing tissue of fruit or vegetable with discrimination capability is presented. A specially designed electrode-pair is used to measure the bioimpedance and Cole parameters are extracted. The relaxation time which is a fundamental property of a given tissue is then estimated and analysis of variance is performed to gain statistical relevance. Bioimpedance is measured for apple and potato tissues in the frequency range of 1 Hz to 1 MHz and rigorous data analyses are performed. With 99% confidence, it is shown than the relaxation time is independent of position of measurement and is specific for a given fruit or vegetable. Further, the tissues of different species of a given fruit (or vegetable) is shown to be discriminated statistically at the confidence level of 98%. An excellent correlation is shown between the bioimpedance parameters and the parameters of cellular structure. Experimental data shows that our technique can be generalized to distinguish unhealthy or treated fruits (or vegetables) and therefore bearing immense applicability in the characterization of plant tissue.
2018 IEEE Electron Devices Kolkata Conference (EDKCON)
Harnessing and usability of electrical energy from piezofilm-based energy harvester is investigat... more Harnessing and usability of electrical energy from piezofilm-based energy harvester is investigated. Three possible combinations such as parallel, series-parallel and series configurations of piezofilms are investigated for load carrying capability. A total of six mass loaded piezofilms are employed in this study. An artificial vibrator is used to simulate the ambient vibration to generate electrical energy from the piezofilms. A commercial passive converter is used to convert generated ac power into usable dc power. Load characteristics are obtained at different vibrating frequency for all the three configurations. Among these three configurations, experimentally it is found the parallel combination of the piezofilms is the best configuration as far power generation capability is concerned, even at low vibrating frequency. It is also noticed that, the peak power is obtained at almost equal load for the first two configurations while the same is found to be at larger load resistance for the last configuration. The possible reasons for differences in the load characteristics of the three configurations are discussed.
AIMS Biophysics, 2020
It is difficult to apply bioimpedance technique to discriminate plant tissues due to the large va... more It is difficult to apply bioimpedance technique to discriminate plant tissues due to the large variability of Cole parameters. A novel electronic method for characterizing tissue of fruit or vegetable with discrimination capability is presented. A specially designed electrode-pair is used to measure the bioimpedance and Cole parameters are extracted. The relaxation time which is a fundamental property of a given tissue is then estimated and analysis of variance is performed to gain statistical relevance. Bioimpedance is measured for apple and potato tissues in the frequency range of 1 Hz to 1 MHz and rigorous data analyses are performed. With 99% confidence, it is shown than the relaxation time is independent of position of measurement and is specific for a given fruit or vegetable. Further, the tissues of different species of a given fruit (or vegetable) is shown to be discriminated statistically at the confidence level of 98%. An excellent correlation is shown between the bioimpedance parameters and the parameters of cellular structure. Experimental data shows that our technique can be generalized to distinguish unhealthy or treated fruits (or vegetables) and therefore bearing immense applicability in the characterization of plant tissue.
INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH, 2020
Usable electrical energy harvesting from mechanical vibration is novel for operating low-power re... more Usable electrical energy harvesting from mechanical vibration is novel for operating low-power remote devices. Two different mass loaded cantilever type piezofilms (commonly used as piezo sensor) are considered in this investigation to convert mechanical vibration into electrical energy. An artificial vibrator is fabricated to simulate the ambient vibration. The ac power generated by the piezofilms is converted by a commercial passive converter to obtain usable dc power. A total of eight experiments are c onducted and we found that in the regime of ambient vibration (<100 Hz), the piezofilms of lower area with lower resonant frequency can provide higher power. Further, when energy harvester contains mult iple piezofilms, better performance is obtained for homogeneous films in contrast to the heterogeneous films. Study on load characteristics reveals that parallel combination of films generates highest power, signifying that a vibrating piezofilm acts as a current source. In our study, peak power is obtained for a load resistance of 480 kΩ, signifying a better current driving capability of the harvester. The peak power is found to be highly nonlinear with the vibrating frequency and is found to be maximum around the vibrating frequency of 59 Hz. In addition, electrical power delivered to the resistive load per unit area of the film is found to be as high as 1.43 µW/cm 2 and it is much higher than the similar reported harvesters.