akshay kale - Academia.edu (original) (raw)

Papers by akshay kale

2019 2nd International Conference on Power and Embedded Drive Control (ICPEDC), 2019

A Voltage Source Converter based High Voltage Direct Current (VSC-HVDC) are the most efficient an... more A Voltage Source Converter based High Voltage Direct Current (VSC-HVDC) are the most efficient and reliable method for electrical power transmission and implementation of HVDC grids over long distances. Generally, a meshed HVDC transmission grid has major problems such as protection against dc faults and to manage the power flows between the lines. As Current Flow Controllers (CFCs) will be required to balance line currents between nodes in meshed-HVDC grids. Hybrid circuit breaker with forced commutation can interrupt the fault current and thus protect grids of HVDC from dc faults but the fault clearing time for the available dc breakers are not fast enough and reliable to provide adequate protection for dc faults on multi-terminal networks. In order to overcome these problems CFCs is interline with hybrid dc circuit breaker. So, CFC will be interline with Pro-active Hybrid DC-Circuit Breaker (PHCB) by suffling the switches orientation within the Load Commutation Switch (LCS). The CFC design and its control performance will be verified by MATLAB Simulink. The two cases are studied which include, an integrated system consisting of CFC with Circuit Breakers (CBs) and the separate design that includes CFC and CB separately that are compared and thus power losses can be reduced.

2018 IEEE 18th International Conference on Nanotechnology (IEEE-NANO), 2018

Acoustic concentration of target species inside fluidic media has gained attention as a pre-conce... more Acoustic concentration of target species inside fluidic media has gained attention as a pre-concentration step for improving the performance of several downstream applications. Majority of the existing literature on simulations of this phenomenon focuses upon a point particle assumption which states that the acoustic field responsible for concentration is unaffected by the particles treated as points in a liquid continuum. In reality, a non-zero volume occupied by the concentrating particles increasingly perturbs the local acoustic fields. This modifies the subsequent concentration process, thereby indicating a dynamic bi-directional coupling between the same and the driving acoustic fields. This paper demonstrates a novel finite element model that considers such a coupling for the first time. Acoustic concentration of latex beads inside a radially polarised piezoceramic tube filled with water is analysed as a proof of concept. By modelling the solid-liquid system as a mixture chara...

Many of the authentication or security system uses numeric characters for password protection, ho... more Many of the authentication or security system uses numeric characters for password protection, however this system fails from several attacks. Attacks are like Brute force,social engineering etc. In today’s world Biometric Technology which produces high accurate processing, but Biometric Technology requires special purpose or additional hardware and large processing power to fulfill the user requirement. The advanced techniques which analyze the behavioral characters of the user is called Behavioral Biometrics. These techniques implement using mouse dynamics. The mouse dynamics technique recognize and extract the movement and characters of user, At the time of interaction between the user interact with the computer. This information which is extracted is then later used for the authentication purpose. The existing system achieves better work in continuous authentication.

International Journal of Advance Research and Innovative Ideas in Education, 2017

In this paper, we give a study of the power-line communication ( PLC) technique.Birth of this tec... more In this paper, we give a study of the power-line communication ( PLC) technique.Birth of this technology is from world war second happened in US. In which utilization of this technology carried out. They developed this technology to secure confidential data from the enemies,During that time, noise was simply added to a voice signal to prevent enemies from listening to the conversations. Noise was added by playing a record of noise in synch with the voice signal and when the voice signal reached the receiver, the noise signal was subtracted out, leaving the original voice signal. In this technique we can transmit data over 230V,50Hz-60Hz frequency, we can control our electronic home equipments by using half duplex communication technique. Along with power transmission system is useful for data transmission as well as for controlling over home appliances. The system will add in effect to reduce extra wiring. In our project the main aim is to secure communication and free of cost commu...

Industrial & Engineering Chemistry Research, 2021

Journal of Micromechanics and Microengineering, 2014

Trapping and concentrating particles in a continuous flow is critical for their detection and ana... more Trapping and concentrating particles in a continuous flow is critical for their detection and analysis as well as removal in many fields. A variety of electrical and non-electrical forces have been demonstrated to continuously capture and enrich particles in microfluidic devices. This work presents an experimental study of the development of particle trapping in an asymmetric ratchet microchannel under dc-biased ac electric fields. The dc/ac dielectrophoretic accumulation of particles in the first pair of ratchets and the dc electrokinetic shifting of particles into the second and subsequent ratchets are studied, which are found to depend on the particle moving direction with respect to the asymmetric ratchets. The dielectrophoretically trapped particles are eventually patterned into triangular zones in all but the first pair of ratchets for both the forward and backward motions. This developing process of particle trapping can be qualitatively simulated by modifying the channel geometry in the computational domain to mimic the particle chains/clusters formed in the ratchets.

Scientific reports, Feb 2, 2017

The ability to isolate specific, viable cell populations from mixed ensembles with minimal manipu... more The ability to isolate specific, viable cell populations from mixed ensembles with minimal manipulation and within intra-operative time would provide significant advantages for autologous, cell-based therapies in regenerative medicine. Current cell-enrichment technologies are either slow, lack specificity and/or require labelling. Thus a rapid, label-free separation technology that does not affect cell functionality, viability or phenotype is highly desirable. Here, we demonstrate separation of viable from non-viable human stromal cells using remote dielectrophoresis, in which an electric field is coupled into a microfluidic channel using shear-horizontal surface acoustic waves, producing an array of virtual electrodes within the channel. This allows high-throughput dielectrophoretic cell separation in high conductivity, physiological-like fluids, overcoming the limitations of conventional dielectrophoresis. We demonstrate viable/non-viable separation efficacy of >98% in pre-puri...

ELECTROPHORESIS, 2013

Insulator-based DEP (iDEP) has been established as a powerful tool for manipulating particles in ... more Insulator-based DEP (iDEP) has been established as a powerful tool for manipulating particles in microfluidic devices. However, Joule heating may become an issue in iDEP microdevices due to the local amplification of electric field around the insulators. This results in an electrothermal force that can manifest itself in the flow field in the form of circulations, thus affecting the particle motion. We develop herein a transient, 3D, fullscale numerical model to study Joule heating and its effects on the coupled transport of charge, heat, and fluid in an iDEP device with a rectangular constriction microchannel. This model is validated by comparing the simulation results with the experimentally obtained fluid flow patterns and particle images that were reported in our recent works. It identifies a significant difference in the time scales of the electric, temperature, and flow fields in iDEP microdevices. It also predicts the locations of electrothermal flow circulations in different halves of the channel at the upstream and downstream of the constriction.

2019 2nd International Conference on Power and Embedded Drive Control (ICPEDC), 2019

A Voltage Source Converter based High Voltage Direct Current (VSC-HVDC) are the most efficient an... more A Voltage Source Converter based High Voltage Direct Current (VSC-HVDC) are the most efficient and reliable method for electrical power transmission and implementation of HVDC grids over long distances. Generally, a meshed HVDC transmission grid has major problems such as protection against dc faults and to manage the power flows between the lines. As Current Flow Controllers (CFCs) will be required to balance line currents between nodes in meshed-HVDC grids. Hybrid circuit breaker with forced commutation can interrupt the fault current and thus protect grids of HVDC from dc faults but the fault clearing time for the available dc breakers are not fast enough and reliable to provide adequate protection for dc faults on multi-terminal networks. In order to overcome these problems CFCs is interline with hybrid dc circuit breaker. So, CFC will be interline with Pro-active Hybrid DC-Circuit Breaker (PHCB) by suffling the switches orientation within the Load Commutation Switch (LCS). The CFC design and its control performance will be verified by MATLAB Simulink. The two cases are studied which include, an integrated system consisting of CFC with Circuit Breakers (CBs) and the separate design that includes CFC and CB separately that are compared and thus power losses can be reduced.

2018 IEEE 18th International Conference on Nanotechnology (IEEE-NANO), 2018

Acoustic concentration of target species inside fluidic media has gained attention as a pre-conce... more Acoustic concentration of target species inside fluidic media has gained attention as a pre-concentration step for improving the performance of several downstream applications. Majority of the existing literature on simulations of this phenomenon focuses upon a point particle assumption which states that the acoustic field responsible for concentration is unaffected by the particles treated as points in a liquid continuum. In reality, a non-zero volume occupied by the concentrating particles increasingly perturbs the local acoustic fields. This modifies the subsequent concentration process, thereby indicating a dynamic bi-directional coupling between the same and the driving acoustic fields. This paper demonstrates a novel finite element model that considers such a coupling for the first time. Acoustic concentration of latex beads inside a radially polarised piezoceramic tube filled with water is analysed as a proof of concept. By modelling the solid-liquid system as a mixture chara...

Many of the authentication or security system uses numeric characters for password protection, ho... more Many of the authentication or security system uses numeric characters for password protection, however this system fails from several attacks. Attacks are like Brute force,social engineering etc. In today’s world Biometric Technology which produces high accurate processing, but Biometric Technology requires special purpose or additional hardware and large processing power to fulfill the user requirement. The advanced techniques which analyze the behavioral characters of the user is called Behavioral Biometrics. These techniques implement using mouse dynamics. The mouse dynamics technique recognize and extract the movement and characters of user, At the time of interaction between the user interact with the computer. This information which is extracted is then later used for the authentication purpose. The existing system achieves better work in continuous authentication.

International Journal of Advance Research and Innovative Ideas in Education, 2017

In this paper, we give a study of the power-line communication ( PLC) technique.Birth of this tec... more In this paper, we give a study of the power-line communication ( PLC) technique.Birth of this technology is from world war second happened in US. In which utilization of this technology carried out. They developed this technology to secure confidential data from the enemies,During that time, noise was simply added to a voice signal to prevent enemies from listening to the conversations. Noise was added by playing a record of noise in synch with the voice signal and when the voice signal reached the receiver, the noise signal was subtracted out, leaving the original voice signal. In this technique we can transmit data over 230V,50Hz-60Hz frequency, we can control our electronic home equipments by using half duplex communication technique. Along with power transmission system is useful for data transmission as well as for controlling over home appliances. The system will add in effect to reduce extra wiring. In our project the main aim is to secure communication and free of cost commu...

Industrial & Engineering Chemistry Research, 2021

Journal of Micromechanics and Microengineering, 2014

Trapping and concentrating particles in a continuous flow is critical for their detection and ana... more Trapping and concentrating particles in a continuous flow is critical for their detection and analysis as well as removal in many fields. A variety of electrical and non-electrical forces have been demonstrated to continuously capture and enrich particles in microfluidic devices. This work presents an experimental study of the development of particle trapping in an asymmetric ratchet microchannel under dc-biased ac electric fields. The dc/ac dielectrophoretic accumulation of particles in the first pair of ratchets and the dc electrokinetic shifting of particles into the second and subsequent ratchets are studied, which are found to depend on the particle moving direction with respect to the asymmetric ratchets. The dielectrophoretically trapped particles are eventually patterned into triangular zones in all but the first pair of ratchets for both the forward and backward motions. This developing process of particle trapping can be qualitatively simulated by modifying the channel geometry in the computational domain to mimic the particle chains/clusters formed in the ratchets.

Scientific reports, Feb 2, 2017

The ability to isolate specific, viable cell populations from mixed ensembles with minimal manipu... more The ability to isolate specific, viable cell populations from mixed ensembles with minimal manipulation and within intra-operative time would provide significant advantages for autologous, cell-based therapies in regenerative medicine. Current cell-enrichment technologies are either slow, lack specificity and/or require labelling. Thus a rapid, label-free separation technology that does not affect cell functionality, viability or phenotype is highly desirable. Here, we demonstrate separation of viable from non-viable human stromal cells using remote dielectrophoresis, in which an electric field is coupled into a microfluidic channel using shear-horizontal surface acoustic waves, producing an array of virtual electrodes within the channel. This allows high-throughput dielectrophoretic cell separation in high conductivity, physiological-like fluids, overcoming the limitations of conventional dielectrophoresis. We demonstrate viable/non-viable separation efficacy of >98% in pre-puri...

ELECTROPHORESIS, 2013

Insulator-based DEP (iDEP) has been established as a powerful tool for manipulating particles in ... more Insulator-based DEP (iDEP) has been established as a powerful tool for manipulating particles in microfluidic devices. However, Joule heating may become an issue in iDEP microdevices due to the local amplification of electric field around the insulators. This results in an electrothermal force that can manifest itself in the flow field in the form of circulations, thus affecting the particle motion. We develop herein a transient, 3D, fullscale numerical model to study Joule heating and its effects on the coupled transport of charge, heat, and fluid in an iDEP device with a rectangular constriction microchannel. This model is validated by comparing the simulation results with the experimentally obtained fluid flow patterns and particle images that were reported in our recent works. It identifies a significant difference in the time scales of the electric, temperature, and flow fields in iDEP microdevices. It also predicts the locations of electrothermal flow circulations in different halves of the channel at the upstream and downstream of the constriction.