KING ALOK YADAV - Academia.edu (original) (raw)

Papers by KING ALOK YADAV

<jats:p xml:lang="en">An easy multiplication method through air-layering of branc... more <jats:p xml:lang="en">An easy multiplication method through air-layering of branches of commercially important horticulture species Litchi chinensis using Sphagnum as substrate media is discussed in the present paper.</jats:p>

The present work involves the simulation design and development of single phase Shunt Active Filt... more The present work involves the simulation design and development of single phase Shunt Active Filter. The topology of the filters is based on a single phase voltage source inverter (VSI) with four insulated gate bipolar transistor (IGBT) semiconductor switches. In p-q theory, the compensation current references are generated based on the measurement of load current and the current feedback from the shunt Active Power Filter output is also required. The pulse width modulated (PWM) technique is then used to generate the required gate drive signals to full bridge VSI.Filter inductors are also incorporated in the output to provide sufficient attenuation of high switching ripples caused by the VSI. Also the effectiveness of the proposed strategies is demonstrated through the results and finally proposed systems are implemented with MATLAB/SIMULINK software.

Lithosphere, 2022

The Gondwana supercontinent was an accretion of several cratons from different landmasses, namely... more The Gondwana supercontinent was an accretion of several cratons from different landmasses, namely South America, Antarctica, Africa, Madagascar, Australia, and the Indian subcontinent. The splitting of Gondwanaland during the Mesozoic led to the gradual rifting of these different cratons over geologic time. In this study, crustal structures are imaged by modeling receiver functions to understand the differences in the nature of the crust that was once part of Precambrian Gondwanaland. On comparing the overall crustal thickness with the age of the cratons, it was found that average bounds of crustal thickness varied from ~33 to 45 km in the Precambrian cratons of different ages, and composition varied from felsic to intermediate (Vp/Vs≈1.65−1.78). Observations of gradational Moho beneath few stations could indicate the possibility of mafic underplating at some point in their history of formation, growth, or evolution. Even if plate tectonics were dominant in the middle to late Archea...

2021 25th International Computer Science and Engineering Conference (ICSEC), 2021

A Differential Neural Computer (DNC) is a type of neural network architecture that can make use o... more A Differential Neural Computer (DNC) is a type of neural network architecture that can make use of external memory. A DNC model can represent complex data sequences and reason about them. However, training a complex DNC with large memory matrices was slow, hence this study focused on improving a DNC model to learn faster and perform bAbi question-answering tasks more accurately. The attempted improvements were to use key-value pairs for memory locations instead of arrays and to obtain a read vector from the memory matrix with a neural network. Evaluation of the improved DNC models on the bAbi dataset showed that their compute time was 13% shorter and their error rate was 6.6% lower. To conclude, the attempted improvements were successful, and the training speed of the key-value memory model also became shorter.

Indian Journal of Forestry, 2014

The present investigations were carried out in Jeypore Reserve Forests in Assam valley tropical w... more The present investigations were carried out in Jeypore Reserve Forests in Assam valley tropical wet evergreen forests. Phytosociological analysis was carried out as per standard methodology. Total 28 family, 47 genus and 53 species were observed. The poaceae was most dominant family. The Shannon – Winner index (H) for herbs ranges from 1.59 to 3.16. The present study will provide the baseline information for biodiversity conservation of tropical wet evergreen forests.

Journal of Optics, 2017

A new encryption scheme using phase masks based on devil's vortex Fresnel lens (DVFL) has been pr... more A new encryption scheme using phase masks based on devil's vortex Fresnel lens (DVFL) has been presented in this study. The encryption is performed using fractional Hartley transform (FRHT) in both spatial and frequency domains. Prior to subjecting the plaintext to operations of the conventional 4f system, it is made to undergo Arnold transform (AT) for additional security. The scheme is validated for grayscale amplitude images. In its optical realization, the use of DVFL eliminates the problem of axis-alignment. The parameters of DVFL, and the orders of FRHT in addition to AT order serve as encryption keys. The scheme has been tested for its sensitivity to these parameters. Also, the scheme is evaluated for its robustness against the occlusion and noise attacks. The use of multiple encryption parameters adds to security of the scheme.

Disaster Studies, 2020

The case study attempts to capture the community’s perspective and understanding of arsenic conta... more The case study attempts to capture the community’s perspective and understanding of arsenic contamination in the high arsenic areas of West Bengal and Assam in India. It tries to articulate the community’s everyday experiences living with this slow poison and present the mechanisms through which they adapt and cope with the problem of iron- and arsenic-rich water. Following an anthropological approach, the study tries to capture the natural, human, social, manufactured and financial capitals of sustainable development within the cultural context of the communities. The study employed mainly participatory rapid appraisal (PRA) techniques to capture people’s understanding of the toxic impact of groundwater arsenic poisoning on their social lives. In the context of their near-complete dependence on groundwater for their daily consumption and the ‘choicelessness’ in tackling the contamination, the communities were also probed on the ‘ability to pay’ for mitigation technologies. The governments of West Bengal and Assam have been involved in the identification of the affected areas and implementation of medium- and long-term mitigation measures. In keeping with the multi-sectoral synergy espoused in the National Policy on Disaster Management 2009 for disaster mitigation, different educational institutions, scientists, NGOs and INGOs have also come together to raise awareness on the issue. But the state efforts remain grossly inadequate in tackling this slow-onset disaster which has assumed monstrous proportions. Therefore, it is imperative that arsenic contamination is brought under the ambit of disaster management as a slow-onset disaster, and that subsequent institutional and financial arrangements are put in place for its effective mitigation.

Lecture Notes in Mechanical Engineering, 2021

In view of the significant diversity of the genus Clerodenderum in Assam and its potential use in... more In view of the significant diversity of the genus Clerodenderum in Assam and its potential use in indigenous medicine systems, a total of 60 respondents from different tribal communities of Nambor Reserve Forest, Assam including Adivasi, Bodo, Karbi, Mishing and Shan were interviewed in 6 villages to put together the various uses and applications.

To save our environment is a prime concern of the government in all over the worlds due to the in... more To save our environment is a prime concern of the government in all over the worlds due to the increment in the usage of automobiles in few decades. This paper presents the development of “RETRO STYLE ELECTRIC BI-CYCLE with FUTURE TEGHNOLOGY”. The aim of this paper is to show that the normal bi-cycle can be upgraded to an electric one by some means that including the development of a new front suspension i.e REDEMPTION SPRINGER FORK and innovative BLDC motor control for providing comfort to the rider. Electric bikes have simultaneously gained popularity in many regions of the world and some have suggested that it could provide an even higher level of service compared to existing systems. There are several challenges that are related electric bike design: electric-assisted range, recharging protocol, and bike and battery checkout procedures. This paper outlines system requirements to successfully develop and deploy an electric bike, focusing on front suspension, operational concepts,...

The Indian Forester, 2013

Guadua angustifolia Kunth. tree is a potential resource as structural and ornamental building mat... more Guadua angustifolia Kunth. tree is a potential resource as structural and ornamental building material due to its high mechanical strength. The air layering of side branches of G. angustifolia using dry Sphagnum khasinum moss as substrate has initiated early rooting in rainy season compared to winter season as well as control conditions.

International Journal of Advance Research, Ideas and Innovations in Technology, 2018

The present study was carried out to assess the early growth performance of Eucalyptus clones in ... more The present study was carried out to assess the early growth performance of Eucalyptus clones in Vindhyan region of Uttar Pradesh for identification of promising clones for the region. A clonal trial was established in the year 2016 in Vindhyan region of Eastern Uttar Pradesh with 19 clones to assess their suitability. The results of early growth performance evaluation of these clones after one year of planting were carried out for annual measurements of survival, total height, girth at breast height (gbh), soil chemical and physical analysis. The data were analyzed statistically. The results of early growth performance evaluation of these clones after one year of planting were carried out for annual measurements of height, girth at breast height (gbh) and soil analysis. The data were analyzed statistically. The highest value of increment in gbh belonged to clones 526 (9.04 cm) followed by 2136 (8.84 cm), P-50 (8.53 cm), P-14 (8.33 cm), P-32 (8.04 cm), 2023 (7.88 cm) and P-13 (7.81 ...

In the Post Cold War Scenario, after dis-integratio n of Soviet Union, the United States of Ameri... more In the Post Cold War Scenario, after dis-integratio n of Soviet Union, the United States of America eme rged as the single largest super power by the virtue of which t he importance of several regional literal and multi lateral strategic groups increased. In order to further the strategic interest, India's "Look East Policy" was initially mainly focused on Economic Interest in ASEAN region in the early year s of globalization. This Article deals with the tra nsition of the "Look East Policy" to the contemporary "Act East Policy".

Supplementary information of "Optimized evolution of networks for principal eigenvector loca... more Supplementary information of "Optimized evolution of networks for principal eigenvector localization" article

This paper presents the design of first and second-order incremental analog-to-digital converters... more This paper presents the design of first and second-order incremental analog-to-digital converters (ADCs). The characteristics of converters are extremely wide from Giga samples to a few samples per second for bandwidth and resolution variation from a few bits to more than 20 bits. Delta sigma converters are most commonly used high-resolution A/D converters. In instrumentation and measurement applications, the continuous operation, the large offset and inaccurate gain of delta-sigma does not satisfy the specifications. The incremental converters are also based on delta-sigma architecture but work in transient mode are more adapted.

Objective : The objective of this study was to evaluate the diagnostic accuracy of various ultras... more Objective : The objective of this study was to evaluate the diagnostic accuracy of various ultrasound parameters in the diagnosis of malignant thyroid nodules and to correlate ultrasonographic findings with cytological diagnosis as reference.Material & Methods: In this prospective study a total of 165 patients attending the surgery/ENT OPD with complaints of thyroid swelling were included. On Ultrasonography the nodules were assessed on the basis of composition , echogenecity, margins , calcification , internal vascularity and presence of any associated lymphadenopathy. Sensitivity, Specificity and diagnostic accuracy of each individual US parameter was calculated . The results were then compared with cytological diagnosis.Results: The incidence of malignancy in our study was 6.66% (11/165). Of all the ultrasound characteristics, a predominantly solid composition, presence of fine calcifications and irregular borders had high sensitivity but low specificity for the diagnosis of ma...

Traffic congestions are a recurring problem that results in significant losses both financially a... more Traffic congestions are a recurring problem that results in significant losses both financially and environmentally. optimizing traffic signal timings is one of the most cost-effective ways to mitigate such effects. optimization of traffic signal timings capable of minimizing congestion is, however, computationally expensive. Research needs to be conducted to develop algorithms capable of better optimization using fewer computational resources. This paper presents a novel approach to traffic signal optimization that combines genetic algorithms and a gradient descent like algorithm to obtain optimized traffic signal timings. The genetic algorithm is used to arrive at a starting point for gradient descent; gradient descent is then used to obtain further improvement.

International Journal of System Assurance Engineering and Management, 2021

Current microbiology, Jan 20, 2018

The antibiotic resistance in bacteria responsible for causing community and health care-associate... more The antibiotic resistance in bacteria responsible for causing community and health care-associated infection displayed a major threat to global health. Use of broad-spectrum antibiotics for the treatment of various ailments poses serious side effects. In the present research, we investigated the combined role of 2% phytic acid with 2% methanolic seed extract of Syzygium cumini and 0.5% sodium chloride for inhibition of Bacillus subtilis and Pseudomonas aeruginosa and found it to be efficient over B. subtilis. The zone of inhibition by present mixture was found to be 2.9 ± 0.0004 and 1.9 ± 0.0006 cm against Bacillus subtilis and P. aeruginosa in comparison to individual component. Mixture was found more potent against B. subtilis and selected for further study. The underlying mechanism involved in inhibitory action of this mixture was determined by Scanning electron microscope, DNA fragmentation and propidium iodide staining. Scanning electron microscopy revealed that inhibition of B...

<jats:p xml:lang="en">An easy multiplication method through air-layering of branc... more <jats:p xml:lang="en">An easy multiplication method through air-layering of branches of commercially important horticulture species Litchi chinensis using Sphagnum as substrate media is discussed in the present paper.</jats:p>

The present work involves the simulation design and development of single phase Shunt Active Filt... more The present work involves the simulation design and development of single phase Shunt Active Filter. The topology of the filters is based on a single phase voltage source inverter (VSI) with four insulated gate bipolar transistor (IGBT) semiconductor switches. In p-q theory, the compensation current references are generated based on the measurement of load current and the current feedback from the shunt Active Power Filter output is also required. The pulse width modulated (PWM) technique is then used to generate the required gate drive signals to full bridge VSI.Filter inductors are also incorporated in the output to provide sufficient attenuation of high switching ripples caused by the VSI. Also the effectiveness of the proposed strategies is demonstrated through the results and finally proposed systems are implemented with MATLAB/SIMULINK software.

Lithosphere, 2022

The Gondwana supercontinent was an accretion of several cratons from different landmasses, namely... more The Gondwana supercontinent was an accretion of several cratons from different landmasses, namely South America, Antarctica, Africa, Madagascar, Australia, and the Indian subcontinent. The splitting of Gondwanaland during the Mesozoic led to the gradual rifting of these different cratons over geologic time. In this study, crustal structures are imaged by modeling receiver functions to understand the differences in the nature of the crust that was once part of Precambrian Gondwanaland. On comparing the overall crustal thickness with the age of the cratons, it was found that average bounds of crustal thickness varied from ~33 to 45 km in the Precambrian cratons of different ages, and composition varied from felsic to intermediate (Vp/Vs≈1.65−1.78). Observations of gradational Moho beneath few stations could indicate the possibility of mafic underplating at some point in their history of formation, growth, or evolution. Even if plate tectonics were dominant in the middle to late Archea...

2021 25th International Computer Science and Engineering Conference (ICSEC), 2021

A Differential Neural Computer (DNC) is a type of neural network architecture that can make use o... more A Differential Neural Computer (DNC) is a type of neural network architecture that can make use of external memory. A DNC model can represent complex data sequences and reason about them. However, training a complex DNC with large memory matrices was slow, hence this study focused on improving a DNC model to learn faster and perform bAbi question-answering tasks more accurately. The attempted improvements were to use key-value pairs for memory locations instead of arrays and to obtain a read vector from the memory matrix with a neural network. Evaluation of the improved DNC models on the bAbi dataset showed that their compute time was 13% shorter and their error rate was 6.6% lower. To conclude, the attempted improvements were successful, and the training speed of the key-value memory model also became shorter.

Indian Journal of Forestry, 2014

The present investigations were carried out in Jeypore Reserve Forests in Assam valley tropical w... more The present investigations were carried out in Jeypore Reserve Forests in Assam valley tropical wet evergreen forests. Phytosociological analysis was carried out as per standard methodology. Total 28 family, 47 genus and 53 species were observed. The poaceae was most dominant family. The Shannon – Winner index (H) for herbs ranges from 1.59 to 3.16. The present study will provide the baseline information for biodiversity conservation of tropical wet evergreen forests.

Journal of Optics, 2017

A new encryption scheme using phase masks based on devil's vortex Fresnel lens (DVFL) has been pr... more A new encryption scheme using phase masks based on devil's vortex Fresnel lens (DVFL) has been presented in this study. The encryption is performed using fractional Hartley transform (FRHT) in both spatial and frequency domains. Prior to subjecting the plaintext to operations of the conventional 4f system, it is made to undergo Arnold transform (AT) for additional security. The scheme is validated for grayscale amplitude images. In its optical realization, the use of DVFL eliminates the problem of axis-alignment. The parameters of DVFL, and the orders of FRHT in addition to AT order serve as encryption keys. The scheme has been tested for its sensitivity to these parameters. Also, the scheme is evaluated for its robustness against the occlusion and noise attacks. The use of multiple encryption parameters adds to security of the scheme.

Disaster Studies, 2020

The case study attempts to capture the community’s perspective and understanding of arsenic conta... more The case study attempts to capture the community’s perspective and understanding of arsenic contamination in the high arsenic areas of West Bengal and Assam in India. It tries to articulate the community’s everyday experiences living with this slow poison and present the mechanisms through which they adapt and cope with the problem of iron- and arsenic-rich water. Following an anthropological approach, the study tries to capture the natural, human, social, manufactured and financial capitals of sustainable development within the cultural context of the communities. The study employed mainly participatory rapid appraisal (PRA) techniques to capture people’s understanding of the toxic impact of groundwater arsenic poisoning on their social lives. In the context of their near-complete dependence on groundwater for their daily consumption and the ‘choicelessness’ in tackling the contamination, the communities were also probed on the ‘ability to pay’ for mitigation technologies. The governments of West Bengal and Assam have been involved in the identification of the affected areas and implementation of medium- and long-term mitigation measures. In keeping with the multi-sectoral synergy espoused in the National Policy on Disaster Management 2009 for disaster mitigation, different educational institutions, scientists, NGOs and INGOs have also come together to raise awareness on the issue. But the state efforts remain grossly inadequate in tackling this slow-onset disaster which has assumed monstrous proportions. Therefore, it is imperative that arsenic contamination is brought under the ambit of disaster management as a slow-onset disaster, and that subsequent institutional and financial arrangements are put in place for its effective mitigation.

Lecture Notes in Mechanical Engineering, 2021

In view of the significant diversity of the genus Clerodenderum in Assam and its potential use in... more In view of the significant diversity of the genus Clerodenderum in Assam and its potential use in indigenous medicine systems, a total of 60 respondents from different tribal communities of Nambor Reserve Forest, Assam including Adivasi, Bodo, Karbi, Mishing and Shan were interviewed in 6 villages to put together the various uses and applications.

To save our environment is a prime concern of the government in all over the worlds due to the in... more To save our environment is a prime concern of the government in all over the worlds due to the increment in the usage of automobiles in few decades. This paper presents the development of “RETRO STYLE ELECTRIC BI-CYCLE with FUTURE TEGHNOLOGY”. The aim of this paper is to show that the normal bi-cycle can be upgraded to an electric one by some means that including the development of a new front suspension i.e REDEMPTION SPRINGER FORK and innovative BLDC motor control for providing comfort to the rider. Electric bikes have simultaneously gained popularity in many regions of the world and some have suggested that it could provide an even higher level of service compared to existing systems. There are several challenges that are related electric bike design: electric-assisted range, recharging protocol, and bike and battery checkout procedures. This paper outlines system requirements to successfully develop and deploy an electric bike, focusing on front suspension, operational concepts,...

The Indian Forester, 2013

Guadua angustifolia Kunth. tree is a potential resource as structural and ornamental building mat... more Guadua angustifolia Kunth. tree is a potential resource as structural and ornamental building material due to its high mechanical strength. The air layering of side branches of G. angustifolia using dry Sphagnum khasinum moss as substrate has initiated early rooting in rainy season compared to winter season as well as control conditions.

International Journal of Advance Research, Ideas and Innovations in Technology, 2018

The present study was carried out to assess the early growth performance of Eucalyptus clones in ... more The present study was carried out to assess the early growth performance of Eucalyptus clones in Vindhyan region of Uttar Pradesh for identification of promising clones for the region. A clonal trial was established in the year 2016 in Vindhyan region of Eastern Uttar Pradesh with 19 clones to assess their suitability. The results of early growth performance evaluation of these clones after one year of planting were carried out for annual measurements of survival, total height, girth at breast height (gbh), soil chemical and physical analysis. The data were analyzed statistically. The results of early growth performance evaluation of these clones after one year of planting were carried out for annual measurements of height, girth at breast height (gbh) and soil analysis. The data were analyzed statistically. The highest value of increment in gbh belonged to clones 526 (9.04 cm) followed by 2136 (8.84 cm), P-50 (8.53 cm), P-14 (8.33 cm), P-32 (8.04 cm), 2023 (7.88 cm) and P-13 (7.81 ...

In the Post Cold War Scenario, after dis-integratio n of Soviet Union, the United States of Ameri... more In the Post Cold War Scenario, after dis-integratio n of Soviet Union, the United States of America eme rged as the single largest super power by the virtue of which t he importance of several regional literal and multi lateral strategic groups increased. In order to further the strategic interest, India's "Look East Policy" was initially mainly focused on Economic Interest in ASEAN region in the early year s of globalization. This Article deals with the tra nsition of the "Look East Policy" to the contemporary "Act East Policy".

Supplementary information of "Optimized evolution of networks for principal eigenvector loca... more Supplementary information of "Optimized evolution of networks for principal eigenvector localization" article

This paper presents the design of first and second-order incremental analog-to-digital converters... more This paper presents the design of first and second-order incremental analog-to-digital converters (ADCs). The characteristics of converters are extremely wide from Giga samples to a few samples per second for bandwidth and resolution variation from a few bits to more than 20 bits. Delta sigma converters are most commonly used high-resolution A/D converters. In instrumentation and measurement applications, the continuous operation, the large offset and inaccurate gain of delta-sigma does not satisfy the specifications. The incremental converters are also based on delta-sigma architecture but work in transient mode are more adapted.

Objective : The objective of this study was to evaluate the diagnostic accuracy of various ultras... more Objective : The objective of this study was to evaluate the diagnostic accuracy of various ultrasound parameters in the diagnosis of malignant thyroid nodules and to correlate ultrasonographic findings with cytological diagnosis as reference.Material & Methods: In this prospective study a total of 165 patients attending the surgery/ENT OPD with complaints of thyroid swelling were included. On Ultrasonography the nodules were assessed on the basis of composition , echogenecity, margins , calcification , internal vascularity and presence of any associated lymphadenopathy. Sensitivity, Specificity and diagnostic accuracy of each individual US parameter was calculated . The results were then compared with cytological diagnosis.Results: The incidence of malignancy in our study was 6.66% (11/165). Of all the ultrasound characteristics, a predominantly solid composition, presence of fine calcifications and irregular borders had high sensitivity but low specificity for the diagnosis of ma...

Traffic congestions are a recurring problem that results in significant losses both financially a... more Traffic congestions are a recurring problem that results in significant losses both financially and environmentally. optimizing traffic signal timings is one of the most cost-effective ways to mitigate such effects. optimization of traffic signal timings capable of minimizing congestion is, however, computationally expensive. Research needs to be conducted to develop algorithms capable of better optimization using fewer computational resources. This paper presents a novel approach to traffic signal optimization that combines genetic algorithms and a gradient descent like algorithm to obtain optimized traffic signal timings. The genetic algorithm is used to arrive at a starting point for gradient descent; gradient descent is then used to obtain further improvement.

International Journal of System Assurance Engineering and Management, 2021

Current microbiology, Jan 20, 2018

The antibiotic resistance in bacteria responsible for causing community and health care-associate... more The antibiotic resistance in bacteria responsible for causing community and health care-associated infection displayed a major threat to global health. Use of broad-spectrum antibiotics for the treatment of various ailments poses serious side effects. In the present research, we investigated the combined role of 2% phytic acid with 2% methanolic seed extract of Syzygium cumini and 0.5% sodium chloride for inhibition of Bacillus subtilis and Pseudomonas aeruginosa and found it to be efficient over B. subtilis. The zone of inhibition by present mixture was found to be 2.9 ± 0.0004 and 1.9 ± 0.0006 cm against Bacillus subtilis and P. aeruginosa in comparison to individual component. Mixture was found more potent against B. subtilis and selected for further study. The underlying mechanism involved in inhibitory action of this mixture was determined by Scanning electron microscope, DNA fragmentation and propidium iodide staining. Scanning electron microscopy revealed that inhibition of B...