Browsing by Author "Sachin Kumar"

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An energy and time-saving task scheduling algorithm for UAV-IoT collaborative system
(Elsevier B.V., 2023) Anuradha Banerjee; Abu Sufian; Ashutosh Srivastava; Sachin Kumar Gupta; Saru Kumari; Sachin Kumar
Unmanned Aerial Vehicles (UAVs) are capable of providing significant potential to the Internet of Things (IoT) devices through sensors, cameras, GPS systems, etc. Therefore, the smart UAV-IoT collaborative system has become a current hot research topic. However, there are issues like resource allocation, security, and privacy preservation, trajectory optimization, intelligent decision, energy harvesting, etc. that need extensive research and analysis. In this article, we propose an energy-efficient and time-saving task scheduling algorithm that divides the IoT devices into certain clusters based on physical proximity. By utilizing the algorithm, cluster heads can apply an Auto Regressive Moving Average (ARMA) model to predict intelligently the timestamp of the arrival of the next task and associated estimated payments. Based on the overall expected payment, a cluster head can smartly advise the UAV about its time of next arrival. Simulation results demonstrate that our proposed Energy and Time-saving Task Scheduling (ETTS) algorithm show significant improvement in terms of energy (around 67%) as well as a delay (around 36%) over the Task scheduling for Indoor Environment (TSIE) and Time Division Multiple Access-Workflow Scheduler (TDMA-WS). The improvement in delay arises from the saved time of retransmissions. ARMA model basically tries to ensure that processing capacity of an UAV doesn't remain unutilized or under-utilized. The energy that UAV invests to arrive at one particular clusterhead, should be reciprocated by a full or close-to-full task queue of a clusterhead. © 2023
Combined Abiotic Stresses: Challenges and Potential for Crop Improvement
(MDPI, 2022) Rubab Shabbir; Rajesh Kumar Singhal; Udit Nandan Mishra; Jyoti Chauhan; Talha Javed; Sadam Hussain; Sachin Kumar; Hirdayesh Anuragi; Dalpat Lal; Pinghua Chen
Abiotic stressors are major constraints that affect agricultural plant physio-morphological and biochemical attributes, resulting in a loss of normal functioning and, eventually, a severe decline in crop productivity. The co-occurrence of different abiotic stresses, rather than a specific stress situation, can alter or trigger a wide range of plant responses, such as altered metabolism, stunted growth, and restricted development. Therefore, systematic and rigorous studies are pivotal for understanding the impact of concurrent abiotic stress conditions on crop productivity. In doing so, this review emphasizes the implications and potential mechanisms for controlling/managing combined abiotic stresses, which can then be utilized to identify genotypes with combined stress tolerance. Furthermore, this review focuses on recent biotechnological approaches in deciphering combined stress tolerance in plants. As a result, agronomists, breeders, molecular biologists, and field pathologists will benefit from this literature in assessing the impact of interactions between combined abiotic stresses on crop performance and development of tolerant/resistant cultivars. © 2022 by the authors.
Correction to: Genetic evidence for a single founding population of the Lakshadweep Islands (Molecular Genetics and Genomics, (2024), 299, 1, (8), 10.1007/s00438-024-02110-z)
(Springer Science and Business Media Deutschland GmbH, 2024) Sachin Kumar; Prajjval Pratap Singh; Nagarjuna Pasupuleti; Shivanand S. Shendre; Jaison Jeevan Sequeira; Idrees Babu; Mohammed S. Mustak; Niraj Rai; Gyaneshwer Chaubey
In this article the author name Mohammed S. Mustak was incorrectly written as Mohammed S. Mutak. The original article has been corrected. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.
Evaluation of different regression models for detection of adulteration of mustard and canola oil with argemone oil using fluorescence spectroscopy coupled with chemometrics
(Taylor and Francis Ltd., 2024) Kunal Shiv; Anupam Singh; Sachin Kumar; Lal Bahadur Prasad; Seema Gupta; Manoj Kumar Bharty
Mustard and canola oils are commonly used cooking oils in Asian countries such as India, Nepal, and Bangladesh, making them prone to adulteration. Argemone is a well-known adulterant of mustard oil, and its alkaloid sanguinarine has been linked with health conditions such as glaucoma and dropsy. Utilising a non-destructive spectroscopic method coupled with a chemometric approach can serve better for the detection of adulterants. This work aimed to evaluate the performance of various regression algorithms for the detection of argemone in mustard and canola oils. The spectral dataset was acquired from fluorescence spectrometer analysis of pure as well as adulterated mustard and canola oils with some local and commercial samples also. The prediction performance of the eight regression algorithms for the detection of adulterants was evaluated. Extreme gradient boosting regressor (XGBR), Category gradient boosting regressor (CBR), and Random Forest (RF) demonstrate potential for predicting adulteration levels in both oils with high R2 values. © 2024 Taylor & Francis Group, LLC.
FRACTIONAL FUZZY MODEL OF ADVECTION-REACTION-DIFFUSION EQUATION WITH APPLICATION IN POROUS MEDIA
(Begell House Inc., 2022) Sachin Kumar
In this present article, a model of the fractional diffusion equation in a fuzzy environment is studied with both singular and nonsingular kernels with a Mittag-Leffler kernel. In this model, initial boundary conditions and coefficients are fuzzy numbers. First of all, we derive the Legendre operational matrix of fractional differentiation concerning the power kernel and Mittag-Leffler kernel. We used the spectral method in addition to these derived operational matrices to find out the numerical solution of the taken model. This method is easily applicable to fuzzy partial differential equation (PDE) with different fractional operators. It reduced the given model into algebraic equations, which with further solving gives the solution of the model. The feasibility and accuracy of the method on a fractional fuzzy PDE can be seen through the numerical examples in which we incorporated the error table calculated between exact and numerical solution. The dynamics of the model concerning different parameters present in the model are presented in thorough figures. The application of this model in porous media is presented. © 2022 by Begell House, Inc.
Genetic evidence for a single founding population of the Lakshadweep Islands
(Springer Science and Business Media Deutschland GmbH, 2024) Sachin Kumar; Prajjval Pratap Singh; Nagarjuna Pasupuleti; Shivanand S. Shendre; Jaison Jeevan Sequeira; Idrees Babu; Mohammed S. Mutak; Niraj Rai; Gyaneshwer Chaubey
Lakshadweep is an archipelago of 36 islands located in the Southeastern Arabian Sea. In the absence of a detailed archaeological record, the human settlement timing of this island is vague. Previous genetic studies on haploid DNA makers suggested sex-biased ancestry linked to North and South Indian populations. Maternal ancestry suggested a closer link with the Southern Indian, while paternal ancestry advocated the Northern Indian genetic affinity. Since the haploid markers are more sensitive to genetic drift, which is evident for the Island populations, we have used the biparental high-resolution single-nucleotide polymorphic markers to reconstruct the population history of Lakshadweep Islands. Using the fine-scaled analyses, we specifically focused on (A) the ancestry components of Lakshadweep Islands populations; (B) their relation with East, West Eurasia and South Asia; (C) the number of founding lineages and (D) the putative migration from Northern India as the paternal ancestry was closer to the North Indian populations. Our analysis of ancestry components confirmed relatively higher North Indian ancestry among the Lakshadweep population. These populations are closely related to the South Asian populations. We identified mainly a single founding population for these Islands, geographically divided into two sub-clusters. By examining the population’s genetic composition and analysing the gene flow from different source populations, this study contributes to our understanding of Lakshadweep Island’s evolutionary history and population dynamics. These findings shed light on the complex interactions between ethnic groups and their genetic contributions in making the Lakshadweep population. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.
Infiltrated electroless deposition of gold nanoparticles on porous Prussian blue-Fe2O3 hetero-microstructures for environmental remediation applications: A novel infiltration strategy to form 3-D nano-catalytic networks
(Elsevier B.V., 2024) Sachin Kumar; Perumal Viswanathan; Mayavan Viji; Kyuwon Kim; Shanmugam Manivannan
Metal and metal oxide nanocomposites are promising candidates for heterogeneous catalytic applications. In this regard, most of the metal oxide inner core volume remains as a dead volume, not participating in the catalysis, only the metal/metal oxide hetero-junctions available at the surfaces are involved in the catalysis. Herein, we report a novel strategy for the infiltration of gold nanoparticles into the inner core of 3D-porous Prussian blue/Fe2O3 hetero-microstructures (PBFHM-Au) beyond its outer surface to form an advanced heterogeneous catalyst for the environmental remediation applications. The porosity of the Prussian blue microstructures is thermally tuned for the infiltration of gold ion precursor into the inner core volume of Prussian blue/Fe2O3 hetero-microstructures to facilitate the galvanic displacement reaction between Fe and Au to enlarge the lattice shell and form Au nanoparticle 3D networks throughout the PBFHM. Notably, the resulting PBFHM-Au2 shows enhanced structural stability electron transfer kinetics and catalytic activity in comparison with the only surface-attached Au/Fe2O3 composite. The obtained PBFHM-Au2 catalyst demonstrates remarkable catalytic activity for Rhodamine-B dye degradation with rate constant (k = 3.47 × 10−2 s−1) and p-nitrophenol reduction reactions with rate constant (k = 1.199 × 10−1 s−1). © 2024 Elsevier B.V.
Lanthanide based double perovskites: Bifunctional catalysts for oxygen evolution/reduction reactions
(Elsevier Ltd, 2021) Sachin Kumar; Monika Singh; Raj Pal; Uday Pratap Azad; Ashish Kumar Singh; Divya Pratap Singh; Vellaichamy Ganesan; Akhilesh Kumar Singh; Rajiv Prakash
In this work, we are reporting the facile synthesis of double perovskite oxide materials LnBa0.5Sr0·5Co1·5Fe0·5O6 (LnBSCF, Ln = Pr, Nd, Sm, and Gd) using citrate-nitrate based sol-gel method. These double perovskite oxide materials exhibit bifunctional catalytic activity for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). The phase formation and structure of the prepared oxides have been determined by powder X-ray diffraction, SEM analysis. Presence of various phases is analyzed and quantified by mean of Le-Bail refinement of XRD profiles. SEM analyses confirm the morphology and composition of prepared catalysts. Electrochemical measurements, e.g. Linear Sweep Voltammetry, Cyclic Voltammetry and Electrochemical Impedance spectroscopy were used to study catalytic performance of prepared catalyst towards both oxygen evolution and oxidation reduction reactions in alkaline solution. Better catalytic performance was obtained in case of double perovskites as compared to parent perovskite for both reactions. Best catalytic performance was observed for Gd based double perovskite. © 2021 Hydrogen Energy Publications LLC
Performance Enhancement of STATCOM Integrated Wind Farm for Harmonics Mitigation Using Optimization Techniques
(Springer Science and Business Media Deutschland GmbH, 2021) Mohamed Hamdy; Mahmoud A. Attia; Almoataz Y. Abdelaziz; Sachin Kumar; Kumari Sarita; R.K. Saket
Renewable energy generation is growing every day all over the world. This injects the grids with harmonics and increases the total harmonics distortion of the systems. In the other hand, Flexible AC transmission systems (FACTS) are used in the different power systems for the enhancement of the stability of these systems. In this paper, Flexible AC transmission systems (FACTS) shall be used not for the enhancement of the stability of the system as usual, but to mitigate the harmonics of the system and decrease the Total harmonics distortion (THD). The Static Synchronous Compensator (STATCOM) performance is compared using The Harmony Search Optimization Algorithm (HSA) and the Invasive Weed Optimization (IWO) trying to achieve better results. MATLAB/SIMULINK is used to create a power system model of wind generation system and then is used to compare the two techniques. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Phytotoxic impact of di-butyl phthalate (DBP) on physiological, biochemical, and oxidative stress parameters of rice (Oryza sativa)
(Springer, 2025) Sachin Kumar; Shivani Prakash Singh; Kunal Shiv; Anupam Singh; Pradeep Harish Kumar; Lal Bahadur Prasad
Phthalates are synthetic compounds, well-known plasticizers, with numerous applications and reported to have adverse effects on all living organisms residing in terrestrial and aquatic environments. In this study, the rice (Oryza sativa) seedlings were exposed to di-butyl phthalate (DBP) exogenously for 7 days, with varying concentrations of 0, 200, 400, 800, and 1600 mg/L, to explore the toxicological, physiological, and biochemical consequences by measuring various parameters such as pigment, lipid, and H2O2 (hydrogen peroxide) contents. The biochemical analysis of seedlings showed that the pigments, lipids, and H2O2 concentrations were altered abnormally. After 7 days of exposure, the maximum amount of DBP was accumulated and translocated in both the shoot and root of the grown seedlings, and all morphological parameters (i.e., length and weight of both shoot and root) and pigment content (such as total carotenoid, chlorophyll a and b) were declined significantly. Superoxide dismutase (SOD), H2O2, and thiobarbituric acid reactive substance (TBARS) levels in seedlings increase as the stress increases due to the higher exposure dose of DBP. Cell viability was observed under a confocal microscope confirming the damage of the plasma membrane. Additionally, molecular docking studies indicated that DBP has a good binding affinity with key antioxidant enzymes of Oryza sativa, interacting via hydrogen bonds with specific amino acids. This suggests a potential mechanistic pathway for the observed biochemical changes in Oryza sativa. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.
Pinpointing the Geographic Origin of 165-Year-Old Human Skeletal Remains Found in Punjab, India: Evidence From Mitochondrial DNA and Stable Isotope Analysis
(Frontiers Media S.A., 2022) J.S. Sehrawat; Shailesh Agrawal; Deeksha Sankhyan; Monika Singh; Sachin Kumar; Satya Prakash; Richa Rajpal; Gyaneshwer Chaubey; Kumarasamy Thangaraj; Niraj Rai
In 2014, 157 years after the Sepoy Mutiny of 1857, several unidentified human skeletons were discovered in an abandoned well at Ajnala, Punjab. The most prevailing hypothesis suggested them as Indian soldiers who mutinied during the Indian uprising of 1857. However, there is an intense debate on their geographic affinity. Therefore, to pinpoint their area of origin, we have successfully isolated DNA from cementum-rich material of 50 good-quality random teeth samples and analyzed mtDNA haplogroups. In addition to that, we analyzed 85 individuals for oxygen isotopes (δ18O values). The mtDNA haplogroup distribution and clustering pattern rejected the local ancestry and indicated their genetic link with the populations living east of Punjab. In addition, the oxygen isotope analysis (δ18O values) from archaeological skeletal remains corroborated the molecular data and suggested the closest possible geographical affinity of these skeletal remains toward the eastern part of India, largely covering the Gangetic plain region. The data generated from this study are expected to expand our understanding of the ancestry and population affinity of martyr soldiers. Copyright © 2022 Sehrawat, Agrawal, Sankhyan, Singh, Kumar, Prakash, Rajpal, Chaubey, Thangaraj and Rai.
Pyramiding of genes for grain protein content, grain quality, and rust resistance in eleven Indian bread wheat cultivars: a multi-institutional effort
(Springer Science and Business Media B.V., 2022) Pushpendra K. Gupta; Harindra S. Balyan; Parveen Chhuneja; Jai P. Jaiswal; Shubhada Tamhankar; Vinod K. Mishra; Navtej S. Bains; Ramesh Chand; Arun K. Joshi; Satinder Kaur; Harinderjeet Kaur; Gurvinder S. Mavi; Manoj Oak; Achla Sharma; Puja Srivastava; Virinder S. Sohu; Pramod Prasad; Priyanka Agarwal; Moin Akhtar; Saurabh Badoni; Reeku Chaudhary; Vijay Gahlaut; Rishi Pal Gangwar; Tinku Gautam; Vandana Jaiswal; Ravi Shekhar Kumar; Sachin Kumar; M. Shamshad; Anupama Singh; Sandhya Taygi; Neeraj Kumar Vasistha; Manish Kumar Vishwakarma
Improvement of grain protein content (GPC), loaf volume, and resistance to rusts was achieved in 11 Indian wheat cultivars that are widely grown in four different agro-climatic zones of India. This involved use of marker-assisted backcross breeding (MABB) for introgression and pyramiding of the following genes: (i) the high GPC gene Gpc-B1; (ii) HMW glutenin subunits 5 + 10 at Glu-D1 loci, and (iii) rust resistance genes, Yr36, Yr15, Lr24, and Sr24. GPC increased by 0.8 to 3.3%, although high GPC was generally associated with yield penalty. Further selection among high GPC lines allowed identification of progenies with higher GPC associated with improvement in 1000-grain weight and grain yield in the backgrounds of the following four cultivars: NI5439, UP2338, UP2382, and HUW468. The high GPC progenies (derived from NI5439) were also improved for grain quality using HMW glutenin subunits 5 + 10 at Glu-D1 loci. Similarly, progenies combining high GPC and rust resistance were obtained in the backgrounds of following five cultivars: Lok1, HD2967, PBW550, PBW621, and DBW1. The improved pre-bred lines developed following multi-institutional effort should prove a valuable source for the development of cultivars with improved nutritional quality and rust resistance in the ongoing wheat breeding programmes. © 2022, The Author(s), under exclusive licence to Springer Nature B.V.
Reconstructing the population history of the Sinhalese, the major ethnic group in Śrī Laṅkā
(Elsevier Inc., 2023) Prajjval Pratap Singh; Sachin Kumar; Nagarjuna Pasupuleti; P.R. Weerasooriya; George van Driem; Kamani H. Tennekoon; Niraj Rai; Gyaneshwer Chaubey; R. Ranasinghe
The Sinhalese are the major ethnic group in Śrī Laṅkā, inhabiting nearly the whole length and breadth of the island. They speak an Indo-European language of the Indo-Iranian branch, which is held to originate in northwestern India, going back to at least the fifth century BC. Previous genetic studies on low-resolution markers failed to infer the genomic history of the Sinhalese population. Therefore, we have performed a high-resolution fine-grained genetic study of the Sinhalese population and, in the broader context, we attempted to reconstruct the genetic history of Śrī Laṅkā. Our allele-frequency-based analysis showed a tight cluster of Sinhalese and Tamil populations, suggesting strong gene flow beyond the boundary of ethnicity and language. Interestingly, the haplotype-based analysis preserved a trace of the North Indian affiliation to the Sinhalese population. Overall, in the South Asian context, Śrī Laṅkān ethnic groups are genetically more homogeneous than others. © 2023 The Authors
Screen Generic Lightlike Submanifolds of Golden Semi-Riemannian Manifolds
(Birkhauser, 2022) Akhilesh Yadav; Sachin Kumar
In the present paper, we introduce screen generic lightlike submanifold of golden semi-Riemannian manifolds and give non-trivial examples of such submanifolds. We obtain necessary and sufficient conditions for integrability of the distributions. Further, we find a necessary and sufficient condition for the induced connection to be a metric connection. We also obtain necessary and sufficient condition for totally umbilical screen generic lightlike submanifold of golden semi-Riemannian manifolds to be totally geodesic. Finally, we find some necessary and sufficient conditions for minimal screen generic lightlike submanifold of golden semi-Riemannian manifolds. © 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.
SCREEN SEMI SLANT LIGHTLIKE SUBMANIFOLDS OF GOLDEN SEMI-RIEMANNIAN MANIFOLDS
(Yarmouk University, 2022) Akhilesh Yadav; Sachin Kumar
In this paper, we introduce the notion of screen semi slant lightlike submanifold of golden semi-Riemannian manifolds and providing characterization theorem with some non-trivial examples of such submanifolds. We find necessary and sufficient conditions for integrability and totally geodesic foliation of distributions RadTM, D1 and D2 Copyright © Deanship of Research and Graduate Studies, Yarmouk University, Irbid, Jordan.
Screen slant lightlike submanifolds of golden semi-Riemannian manifolds
(Institute of Mathematics, 2024) Sachin Kumar; Akhilesh Yadav
The aim of our paper is to introduce the notion of screen slant lightlike submanifolds of golden semi-Riemannian manifolds. We give some non-trivial examples of screen slant lightlike submanifolds and provide a characterization theorem of such submanifolds. Further, we obtain necessary and sufficient conditions for integrability of the distributions and investigate the geometry of the leaves of the foliation de-termined by the distributions. We also obtain a necessary and sufficient condition for the induced connection to be a metric connection. © 2024, Institute of Mathematics. All rights reserved.
Screen transversal CR-lightlike submanifolds of golden semi-Riemannian manifolds
(World Scientific, 2025) Akhilesh Yadav; Sachin Kumar
In this paper, we introduce a new class of lightlike submanifolds namely, screen transversal Cauchy–Riemann (CR)-lightlike submanifolds of golden semi-Riemannian manifolds. We give some non-trivial examples of screen transversal CR-lightlike submanifolds. Further, we obtain necessary and sufficient conditions for integrability of the distributions and investigate the geometry of the leaves of the foliation determined by the distributions. We also obtain a necessary and sufficient condition for the induced connection to be a metric connection. Finally, we find some necessary and sufficient conditions for minimal screen transversal CR-lightlike submanifolds of golden semi-Riemannian manifolds. © 2025 World Scientific Publishing Company.
SEMI-SLANT LIGHTLIKE SUBMANIFOLDS OF GOLDEN SEMI-RIEMANNIAN MANIFOLDS
(University of Kragujevac, Faculty of Science, 2025) Sachin Kumar; Akhilesh Yadav
The aim of our paper is to introduce the notion of semi-slant lightlike submanifolds of golden semi-Riemannian manifolds. We give non-trivial examples of semi-slant lightlike submanifolds and provide a characterization theorem of such submanifolds. Further, we obtain necessary and sufficient conditions for integrability of the distributions and investigate the geometry of the leaves of the foliation determined by the distributions. We also obtain a necessary and sufficient condition for the induced connection to be a metric connection. Finally, we obtain necessary and sufficient condition for mixed-geodesic semi-slant lightlike submanifold of golden semi-Riemannian manifold. © (2025), (University of Kragujevac, Faculty of Science). All Rights Reserved.
SLANT LIGHTLIKE SUBMANIFOLDS OF GOLDEN SEMI-RIEMANNIAN MANIFOLDS
(Drustvo Matematicara Srbije, 2023) Akhilesh Yadav; Sachin Kumar
In this paper, we introduce the notion of slant lightlike submanifold of a golden semi-Riemannian manifold and provide a characterization theorem with some non-trivial examples of such submanifolds. We find necessary and sufficient conditions for integrability of distributions. Finally, we study curvature properties of slant lightlike submanifolds of golden semi-Riemannian manifolds. © 2023, Drustvo Matematicara Srbije. All rights reserved.
The genetic admixture and assimilation of Ahom: a historic migrant from Thailand to India
(Oxford University Press, 2024) Sachin Kumar; Prajjval Pratap Singh; Nagarjuna Pasupuleti; Veena Mushrif Tripathy; Milan Kumar Chauley; Gyaneshwer Chaubey; Niraj Rai
The Northeastern region of India is considered a gateway for modern humans' dispersal throughout Asia. This region is a mixture of various ethnic and indigenous populations amalgamating multiple ancestries. One reason for such amalgamation is that, South Asia experienced multiple historic migrations from various parts of the world. A few examples explored genetically are Jews, Parsis and Siddis. Ahom is a dynasty that historically migrated to India during the 12th century. However, this putative migration has not been studied genetically at high resolution. Therefore, to validate this historical evidence, we genotyped autosomal data of the Modern Ahom population residing in seven sister states of India. Principal Component and Admixture analyses haave suggested a substantial admixture of the Ahom population with the local Tibeto-Burman populations. Moreover, the haplotype-based analysis has linked these Ahom individuals mainly with the Kusunda (a language isolated from Nepal) and Khasi (an Austroasiatic population of Meghalaya). Such unexpected presence of widespread population affinities suggests that Ahom mixed and assimilated a wide variety of Trans-Himalayan populations inhabiting this region after the migration. In summary, we observed a significant deviation of Ahom from their ancestral homeland (Thailand) and extensive admixture and assimilation with the local South Asian populations. © 2024 The Author(s). Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.