varsha yadav - Academia.edu (original) (raw)

Papers by varsha yadav

Research paper thumbnail of Linking Supervisor and Co-workers Support to Organizational Commitment: Mediating Effect of Work-Family Conflict

Ramanujan International Journal of Business and Research

Research paper thumbnail of Multifunctional Grid Interfaced Solar Based Microgrid with Seamless Mode Transition

2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2020

This work presents an adaptive control approach of solar Photovoltaic (PV) based nonconventional ... more This work presents an adaptive control approach of solar Photovoltaic (PV) based nonconventional energy system (NCES) with seamless changeover proficiency from an islanded mode (ILM) to grid-connected mode (GCM). The NCES has a capability to feed the load both in GCM and ILM and it operates smoothly during mode shifting from IL to GC and vice-versa. The unknown disruptions and uncertainties of NCES in GC mode are taken care by proportional plus multilayer modified third order sinusoidal signals integrator (P+M3rdOSSI) with multilayer harmonic decoupling network (MHDN). The concern like power fluctuations, DC offset, unbalance in voltage are successfully taken care by P+M3rdOSSI with MHDN. With the help of this algorithm, the sinusoidal quadrature fundamental component (SQFC) is extracted and reduces computational time. At the point of linkage (POL), the power quality gets improve with this control. It improves overall system performance as it operates adequately in steady state and ...

Research paper thumbnail of Probiotics, Prebiotics & Synbiotics: A New Era

The gut microflora health is important to consider as the alteration in the species gives rise to... more The gut microflora health is important to consider as the alteration in the species gives rise to many diseases related to Gastrointestinal tract, Gut-lung axis, Gut-brain axis giving a birth to various types of inflammations, cancer and other metabolic problems. In this review, there is a discussion about the probiotic microbes with its broad range of capability of alleviating diseases, lactose intolerance, lung inflammation, immunomodulation, deficiency of B-vitamins, etc. The prebiotics acts as a food for probiotics, which are present in abundance in natural sources. Synbiotics are made with various formulations of probiotics and probiotics to confer health benefits.

Research paper thumbnail of Fingerprinting Based Recursive Information Hiding Strategy in Cloud Computing Environment

The collection of interconnected servers that are provisioned dynamically on demand, for the exec... more The collection of interconnected servers that are provisioned dynamically on demand, for the execution of applications, to the customer is referred as cloud systems. Cloud computing provides clients the facility to store their data on the cloud; hence security of data stored on the servers of datacenters of Cloud service providers is an important issue. This paper proposed a scheme that helps in ensuring the security of data stored in the servers of Cloud systems. The proposed scheme is based on two methods - Information splitting and Fingerprinting. Information splitting helps in maintaining confidentiality and integrity of data and Fingerprinting helps in recovery of data. The property of proposed scheme that makes it different from existing data storage schemes is that integrity is ensured by client. This property may help in gaining trust of clients.

Research paper thumbnail of Seamless Control of Renewable Energy System with Grid Connected and Islanded Modes

2020 IEEE 17th India Council International Conference (INDICON)

For the seamless synchronization of grid, this work presents the performance enhancement of a non... more For the seamless synchronization of grid, this work presents the performance enhancement of a nonconventional energy based microgrid. A robust control approach is used for Solar Photovoltaic (SPV) and a battery energy storage (BES) based renewable energy system (RNES) with seamless changeover proficiency from grid connected mode (GCM) to the standalone mode (SAM) and grid reconnected mode (GRM). The RNES has a capability to feed the load both in GCM and SAM modes and it operates smoothly during mode shifting from SAM to GCM and GCM to SAM. The unknown disruptions and uncertainties of microgrid in GCM are taken care by a Multilayer Harmonic Decoupling Network (MHDN) based modified multilayer fifth order generalized integrator with an adaptive frequency locked loop (MMVthOGI-AFLL) based control. The concern like power fluctuations, DC offset, unbalance in voltage produced by RNES in GCM, are successfully taken care by MMVthOGI-AFLL with MHDN. With the help of this algorithm, the sinusoidal quadrature fundamental component (SQFC) is extracted and reduces computational time unlike the conventional SOGI. To control the NCES in an IL mode, a control algorithm is used based on the proportional plus resonant (P+R) control. The steady state error gets reduced and system become robust with the help of P+R based controller. Simulated results have been presented to demonstrate the performance of the NCES and validate the robustness and effectiveness of control schemes. Moreover, total harmonic distortions (THDs) of the load and grid parameters are in the limits of the IEEE-519 standard.

Research paper thumbnail of Green Synthesis of Silver Nanoparticles from Aqueous leaf extract of "Selaginella bryopteris" and elucidation of its Antimicrobial activity

Current Bioactive Compounds

Background: Biosynthesis of nanoparticles from aqueous leaf extract of ‘Selaginella bryopteris’ i... more Background: Biosynthesis of nanoparticles from aqueous leaf extract of ‘Selaginella bryopteris’ is a green chemistry approach and is considered to be one of the most efficient methods as it is devoid of toxic chemicals as well as provides natural capping agents for the stabilization of synthesized nanoparticles. ‘S.bryopteris’ also known as ‘Sanjeevani’ (in India), is thought to be prospective natural resource that possesses extraordinary pharmaceutical potential. Objective: S. bryopteris is exclusively native to India and has already been known for its expression of stress-associated genes and high levels of protective metabolites of sugars, phenolic compounds, and polyols. Its potential as an antibacterial agent is being elucidated. Methods: Different leaf extract volumes, silver nitrate (AgNO3) concentrations, and reaction time were investigated separately and the optimal conditions for the synthesis of AgNPs were suggested. The resulting AgNPs were characterized by various techn...

Research paper thumbnail of Nonconventional Energy Sources Based Microgrid with Seamless Transition Capabilities

2020 3rd International Conference on Energy, Power and Environment: Towards Clean Energy Technologies

The nonconventional energy sources based microgrid increases the reliability and sustainability o... more The nonconventional energy sources based microgrid increases the reliability and sustainability of supply. This work presents a system having a wind and solar Photovoltaic (PV) along with battery energy storage (BES) with seamless transition capability from grid connected (GC) to islanded (IL) and vice-versa. The disruptions and uncertainties of MG in grid connected mode are managed by a combined generalized complex filter (CGCF) based control. CGCF solves the issues like fluctuations, DC offset, imbalance in voltage, swell/sag produced by the system. To control the MG in an IL mode, the proportional resonant combine with resonant ($\text{PR}+\mathrm{R}$) based control algorithm is used. For synchronization of the grid, a dual CGCF (DCGCF) is cascaded with phase locked loop (PLL) is used. During various operating conditions, the performance of system is found satisfactory.

Research paper thumbnail of Linking Supervisor and Co-workers Support to Organizational Commitment: Mediating Effect of Work-Family Conflict

Ramanujan International Journal of Business and Research

Research paper thumbnail of Multifunctional Grid Interfaced Solar Based Microgrid with Seamless Mode Transition

2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2020

This work presents an adaptive control approach of solar Photovoltaic (PV) based nonconventional ... more This work presents an adaptive control approach of solar Photovoltaic (PV) based nonconventional energy system (NCES) with seamless changeover proficiency from an islanded mode (ILM) to grid-connected mode (GCM). The NCES has a capability to feed the load both in GCM and ILM and it operates smoothly during mode shifting from IL to GC and vice-versa. The unknown disruptions and uncertainties of NCES in GC mode are taken care by proportional plus multilayer modified third order sinusoidal signals integrator (P+M3rdOSSI) with multilayer harmonic decoupling network (MHDN). The concern like power fluctuations, DC offset, unbalance in voltage are successfully taken care by P+M3rdOSSI with MHDN. With the help of this algorithm, the sinusoidal quadrature fundamental component (SQFC) is extracted and reduces computational time. At the point of linkage (POL), the power quality gets improve with this control. It improves overall system performance as it operates adequately in steady state and ...

Research paper thumbnail of Probiotics, Prebiotics & Synbiotics: A New Era

The gut microflora health is important to consider as the alteration in the species gives rise to... more The gut microflora health is important to consider as the alteration in the species gives rise to many diseases related to Gastrointestinal tract, Gut-lung axis, Gut-brain axis giving a birth to various types of inflammations, cancer and other metabolic problems. In this review, there is a discussion about the probiotic microbes with its broad range of capability of alleviating diseases, lactose intolerance, lung inflammation, immunomodulation, deficiency of B-vitamins, etc. The prebiotics acts as a food for probiotics, which are present in abundance in natural sources. Synbiotics are made with various formulations of probiotics and probiotics to confer health benefits.

Research paper thumbnail of Fingerprinting Based Recursive Information Hiding Strategy in Cloud Computing Environment

The collection of interconnected servers that are provisioned dynamically on demand, for the exec... more The collection of interconnected servers that are provisioned dynamically on demand, for the execution of applications, to the customer is referred as cloud systems. Cloud computing provides clients the facility to store their data on the cloud; hence security of data stored on the servers of datacenters of Cloud service providers is an important issue. This paper proposed a scheme that helps in ensuring the security of data stored in the servers of Cloud systems. The proposed scheme is based on two methods - Information splitting and Fingerprinting. Information splitting helps in maintaining confidentiality and integrity of data and Fingerprinting helps in recovery of data. The property of proposed scheme that makes it different from existing data storage schemes is that integrity is ensured by client. This property may help in gaining trust of clients.

Research paper thumbnail of Seamless Control of Renewable Energy System with Grid Connected and Islanded Modes

2020 IEEE 17th India Council International Conference (INDICON)

For the seamless synchronization of grid, this work presents the performance enhancement of a non... more For the seamless synchronization of grid, this work presents the performance enhancement of a nonconventional energy based microgrid. A robust control approach is used for Solar Photovoltaic (SPV) and a battery energy storage (BES) based renewable energy system (RNES) with seamless changeover proficiency from grid connected mode (GCM) to the standalone mode (SAM) and grid reconnected mode (GRM). The RNES has a capability to feed the load both in GCM and SAM modes and it operates smoothly during mode shifting from SAM to GCM and GCM to SAM. The unknown disruptions and uncertainties of microgrid in GCM are taken care by a Multilayer Harmonic Decoupling Network (MHDN) based modified multilayer fifth order generalized integrator with an adaptive frequency locked loop (MMVthOGI-AFLL) based control. The concern like power fluctuations, DC offset, unbalance in voltage produced by RNES in GCM, are successfully taken care by MMVthOGI-AFLL with MHDN. With the help of this algorithm, the sinusoidal quadrature fundamental component (SQFC) is extracted and reduces computational time unlike the conventional SOGI. To control the NCES in an IL mode, a control algorithm is used based on the proportional plus resonant (P+R) control. The steady state error gets reduced and system become robust with the help of P+R based controller. Simulated results have been presented to demonstrate the performance of the NCES and validate the robustness and effectiveness of control schemes. Moreover, total harmonic distortions (THDs) of the load and grid parameters are in the limits of the IEEE-519 standard.

Research paper thumbnail of Green Synthesis of Silver Nanoparticles from Aqueous leaf extract of "Selaginella bryopteris" and elucidation of its Antimicrobial activity

Current Bioactive Compounds

Background: Biosynthesis of nanoparticles from aqueous leaf extract of ‘Selaginella bryopteris’ i... more Background: Biosynthesis of nanoparticles from aqueous leaf extract of ‘Selaginella bryopteris’ is a green chemistry approach and is considered to be one of the most efficient methods as it is devoid of toxic chemicals as well as provides natural capping agents for the stabilization of synthesized nanoparticles. ‘S.bryopteris’ also known as ‘Sanjeevani’ (in India), is thought to be prospective natural resource that possesses extraordinary pharmaceutical potential. Objective: S. bryopteris is exclusively native to India and has already been known for its expression of stress-associated genes and high levels of protective metabolites of sugars, phenolic compounds, and polyols. Its potential as an antibacterial agent is being elucidated. Methods: Different leaf extract volumes, silver nitrate (AgNO3) concentrations, and reaction time were investigated separately and the optimal conditions for the synthesis of AgNPs were suggested. The resulting AgNPs were characterized by various techn...

Research paper thumbnail of Nonconventional Energy Sources Based Microgrid with Seamless Transition Capabilities

2020 3rd International Conference on Energy, Power and Environment: Towards Clean Energy Technologies

The nonconventional energy sources based microgrid increases the reliability and sustainability o... more The nonconventional energy sources based microgrid increases the reliability and sustainability of supply. This work presents a system having a wind and solar Photovoltaic (PV) along with battery energy storage (BES) with seamless transition capability from grid connected (GC) to islanded (IL) and vice-versa. The disruptions and uncertainties of MG in grid connected mode are managed by a combined generalized complex filter (CGCF) based control. CGCF solves the issues like fluctuations, DC offset, imbalance in voltage, swell/sag produced by the system. To control the MG in an IL mode, the proportional resonant combine with resonant ($\text{PR}+\mathrm{R}$) based control algorithm is used. For synchronization of the grid, a dual CGCF (DCGCF) is cascaded with phase locked loop (PLL) is used. During various operating conditions, the performance of system is found satisfactory.