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Communications in Theoretical Physics 2024年第5期76卷 114-127页

作者： sourav Chaudhary Jitendra kumar s.k maurya sweeti kiroriwal Abdul Aziz Department of Mathematics Central University of HaryanaJant-PaliMahendergarhIndia Department of Mathematical and Physical sciences College of Arts and ScienceUniversity of NizwaP.O.Box 33Nizwa 616Oman

In this work,we have explored wormhole(WH)solutions in F(R,L_(m))gravity by assuming the Morris-Thorne WH metric and F(R,Lm)=R/2+(1+γR)L_(m),whereγis the free model *** determined the WH solutions by utilizing two newly developed shape functions(sF)that satisfy all basic conditions for a WH’s physical *** also observe that the null energy condition(NEC)behaves ***,for both models,we use the volume integral quantifier(VIQ)and Tolman-Oppenheimer-Volkoff(TOV)equation to determine how much exotic matter is needed near the WH throat and the stability of the *** extensive detailed discussions of the matter components have been done via graphical *** obtained WH geometries meet the physically acceptable conditions for a stable wormhole.

关键词： energy conditions wormhole exotic matter F(R L_(m))gravity

Physical properties and maximum allowable mass-radius relation of complexity-free compact stellar objects within modified f(R,T)gravity formalism

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Chinese Physics C 2024年第7期48卷 273-288页

作者： M.k.Jasim s.k.maurya Abdelghani Errehymy Ali khalid Jassim kottakkaran sooppy Nisar Abdel-Haleem Abdel-Aty Department of Mathematical and Physical sciences College of Arts and SciencesUniversity of NizwaNizwa 616Sultanate of Oman Astrophysics Research Centre School of MathematicsStatistics and Computer ScienceUniversity of KwaZulu-NatalPrivate Bag X54001Durban 4000South Africa Electrical Engineering Department College of EngineeringMustansiriyah UniversityBaghdadIraq Department of Mathematics College of Science and Humanities in AlkharjPrince Sattam bin Abdulaziz UniversityAl KharjSaudi Arabia Department of Physics College of SciencesUniversity of BishaP.O.Box 344Bisha 61922Saudi Arabia

This paper investigates the physical properties and predicted radii of compact stars generated by the Tolman-IV complexity-free model within the background of modified gravity theory,particularly the f(R,T)-gravity theory,under complexity formalism for a spherically symmetric spacetime proposed by ***[Phys Rev D 97:044010,2018].By solving the resulting set of differential equations,we obtain the explicit forms of the energy-momentum(EM)tensor components,including the density,radial pressure,and tangential *** influence of the parameterχon various physical properties of the star is thoroughly *** model undergoes a series of rigorous tests to determine its physical *** findings indicate that the model exhibits regularity,stability,and a surface with vanishing *** boundary of this surface is determined by carefully selecting the parameter *** complexity method employed in f(R,T)gravity offers an interesting approach for developing astrophysical models that are consistent with observable events as demonstrated by recent *** this regard,we use observational data from the GW190814 event,detected by the LIGO and Virgo observatories,to investigate the validity of the Tolman-IV model in f(R,T)*** analysis includes comparing the model's predictions with the observed characteristics of the compact object involved in the *** addition,data from two-millisecond pulsars,PsR J1614-2230 and PsR J0952-0607,are incorporated to further constrain the theoretical ***,we present a diagram depicting the relationship between the total mass and radius of the compact object candidates for different values ofχ.

关键词： complexity modified gravity compact stars

Wharton’s jelly mesenchymal stem cells: Future regenerative medicine for clinical applications in mitigation of radiation injury

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World Journal of stem Cells 2024年第7期16卷 742-759页

作者： Prashasti sharma Dharmendra kumar maurya Life sciences Homi Bhabha National InstituteMumbai 400094MaharashtraIndia Radiation Biology&Health sciences Division Bhabha Atomic Research CentreMumbai 400085MaharashtraIndia

Wharton’s jelly mesenchymal stem cells(WJ-MsCs)are gaining significant attention in regenerative medicine for their potential to treat degenerative diseases and mitigate radiation ***-MsCs are more naïve and have a better safety profile,making them suitable for both autologous and allogeneic *** review highlights the regenerative potential of WJ-MsCs and their clinical applications in mitigating various types of radiation *** this review,we will also describe why WJ-MsCs will become one of the most probable stem cells for future regenerative medicine along with a balanced view on their strengths and ***,the most updated literature related to both preclinical and clinical usage of WJ-MsCs for their potential application in the regeneration of tissues and organs will also be compiled.

关键词： stem cells Wharton’s jelly mesenchymal stem cells Radiotherapy Xerostomia Lung fibrosis

Review of Electrochemical sensors and Biosensors Based on First-Row Transition Metals,Their Oxides,and Noble Metals Nanoparticles

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Journal of Analysis and Testing 2024年第2期8卷 143-159页

作者： kulveer singh kuldeep kumar maurya Manisha Malviya Department of Chemistry Indian Institute of Technology(Banaras Hindu University)Varanasi221005India

The use of electrochemical sensors for sensitive disease diagnosis and detecting various species with pharmacological,therapeutic,industrial,food-related,and environmental origins is now widely accepted.A catalytic or binding event resulting from the sensor’s electroactive component recognizing its analyte creates an electrical signal proportionate to the analyte concentration,which is then monitored by a *** development of morphologically distinct metal and metal oxide nanoparticles formed from first-row transition elements(Mn,Cr,Fe,Co,Ti,Ni,Cu,Zn)and noble metals(Pt,Au,Ag,Pd)is described in this *** effect of these metal nanoparticles has been studied using Tetracyanoquinodimethane(TCNQ),Ferrocene,and other organic compounds as electroactive species using carbon paste-modified *** sensors,mostly based on ferrocene,are exceedingly sensitive,selective,affordable,and for detecting numerous biomolecules like glucose,dopamine,NADH,ascorbic acid,and a few dyes and are simple to *** recent decades,charge transfer organic species-based chemosensors have become a prominent study *** paper outlines current developments in electrochemical biosensors based on transition metal nanoparticles,covering glucose,ascorbic acid,uric acid,and other inorganic and organic *** importance of transition metal and transition metal oxide nanoparticles as potential electrode modifiers for developing sensors is highlighted.A discussion of the present problem and possible solutions,and plausible future directions marks the review’s conclusion.

关键词： Electrochemical sensing Amperometry Cyclic voltammetry square wave voltammetry Linear sweep voltammetry

A Comprehensive Review on Preclinical safety and Toxicity of Medicinal Plants

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Clinical Complementary Medicine and Pharmacology 2024年第1期4卷 95-111页

作者： Madhav Nilakanth Mugale kapil Dev Bhumika s.More Vaishali sunil Mishra kaveri R.Washimkar kishan singh Rakesh maurya srikanta kumar Rath Debprasad Chattopadhyay Naibedya Chattopadhyay Division of Toxicology and Experimental Medicine CSIR-Central Drug Research Institute(CSIR-CDRI)Lucknow 226031India Division of Phytochemistry CSIR-Central Institute of Medicinal and Aromatic Plants(CSIR-CIMAP)Lucknow 226015India Medicinal and Process Chemistry Division CSIR-CDRI Lucknow 226031India Division of Endocrinology CSIR-CDRI Lucknow 226031India Division of Ethnomedicine ICMR-National Institute of Traditional MedicineNehru NagarBelagavi 590010and ICMR-Virus UnitKolkata 700010India Department of Health Research NSHM Knowledge CampusKolkata 700051India

Background:Globally,80%people use plant-derived products for treating or preventing *** prevalent perception about medicinal plants is that they are safe and devoid of adverse ***,approximately 1,50,000 plants contain toxic ***:The present review focuses on medicinal plant extracts/fractions toxicity assessments made in preclin-ical models by oral ***:Detail studies were searched from databases including PubMed and Google scholar.A manual reference screening of the selected studies was done to identify relevant articles,with no language restriction being imposed at the time of ***:The studies included were performed in rodents,and the test substances were administered *** search revealed 33 widely used plants or products with significant toxicity,and phytochemicals from these plants have been *** a systematic review,we identified a plethora of medicinal plant extracts reporting safety and toxicity ***:In the future,preclinical toxicokinetic studies of herbs and the determination of their no-observed-adverse-effect levels are required for a complete safety ***,the interaction of herbs with com-monly used/over-the-counter drugs in terms of the latter’s metabolic profile should be undertaken.

关键词： Extract Herbal medicine Toxicity Rodent secondary metabolite

Bifurcation analysis and optimal control of an epidemic model with limited number of hospital beds

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International Journal of Biomathematics 2023年第4期16卷 229-253页

作者： A.k.Misra Jyoti maurya Department of Mathematics Institute of Science Banaras Hindu UniversityVaranasi 221005India

This paper deals with a three-dimensional nonlinear mathematical model to analyze an epidemic's future course when the public healthcare facilities,specifically the number of hospital beds,are *** feasibility and stability of the obtained equilibria are analyzed,and the basic reproduction number(Ro)is *** show that the system exhibits transcritical *** show the existence of Bogdanov-Takens bifurcation,we have derived the normal *** have also discussed a generalized Hopf(or Bautin)bifurcation at which the first Lyapunov coefficient *** show the existence of saddle-node bifurcation,we used sotomayor's ***,we have identified an optimal layout of hospital beds in order to control the disease with minimum possible *** optimal control setting is studied analytically using optimal control theory,and numerical simulations of the optimal regimen are presented as well.

关键词： Hospital beds Hopf-bifurcation saddle-node bifurcation transcritical bifurcation Bogdanov-Takens bifurcation optimal control

Feature selection: key to enhance node classification with graph neural networks

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CAAI Transactions on Intelligence Technology 2023年第1期8卷 14-28页

作者： sunil kumar maurya Xin Liu Tsuyoshi Murata Tokyo Institute of Technology TokyoJapan AIRC AISTTokyoJapan

Graphs help to define the relationships between entities in the *** relationships,represented by edges,often provide additional context information which can be utilised to discover patterns in the *** Neural Networks(GNNs)employ the inductive bias of the graph structure to learn and predict on various *** primary operation of graph neural networks is the feature aggregation step performed over neighbours of the node based on the structure of the *** addition to its own features,for each hop,the node gets additional combined features from its *** aggregated features help define the similarity or dissimilarity of the nodes with respect to the labels and are useful for tasks like node ***,in real-world data,features of neighbours at different hops may not correlate with the node's ***,any indiscriminate feature aggregation by GNN might cause the addition of noisy features leading to degradation in model's *** this work,we show that selective aggregation of node features from various hops leads to better performance than default aggregation on the node classification ***,we propose a Dual-Net GNN architecture with a classifier model and a selector *** classifier model trains over a subset of input node features to predict node labels while the selector model learns to provide optimal input subset to the classifier for the best *** two models are trained jointly to learn the best subset of features that give higher accuracy in node label *** extensive experiments,we show that our proposed model outperforms both feature selection methods and state-of-the-art GNN models with remarkable improvements up to 27.8%.

关键词： classification feature selection neural network

Robust Iteration-dependent Least Mean square-based Distribution static Compensator Using Optimized PI Gains

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Chinese Journal of Electrical Engineering 2022年第4期8卷 79-90页

作者： sabha Raj Arya Rakesh maurya Jayadeep srikakolapu Department of Electrical Engineering Sardar Vallabhbhai National Institute of TechnologySurat 395007India

A robust iteration-dependent least mean square(RIDLMs)algorithm-based fundamental extractor is developed to estimate the fundamental components of the load current for a four-wire DsTATCOM with a nonlinear *** averaging parameter for calculating the variable step size is iteration dependent and uses variable tuning *** than using the current value,the previous learning rate was used in this method to achieve a more adaptive *** additional control factor aids in determining the exact learning rate,resulting in reliable and convergent *** faster convergence rate and the avoidance of local minima make it *** estimation of the PI controller gains is achieved through a self-adaptive multi-population *** adaptive change in the group number will increase exploration and *** self-adaptive nature of the algorithm was used to determine the subpopulation number needed according to the fitness *** main advantage of this self-adaptive nature is the multi-population spread throughout the search space for a better optimal *** estimated gains of the PI controllers are used for the DC bus and AC terminal voltage error *** RIDLMs-based control with PI gains obtained using the proposed optimization algorithm showed better power quality *** considered RIDLMs-supported control was demonstrated experimentally using d-sPACE-1104.

关键词： Least mean square variable learning DsTATCOM local minima Rao algorithm reactive power neutral current

Analyzing the Effects of Milling and sintering Parameters on Crystalline Phase Evolution and Mechanical Properties of Al_(86)Ni_(8)Y_(6) and Al_(86)Ni_(6)Y_(4.5)Co_(2)La_(1.5) Amorphous Ribbons

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Acta Metallurgica sinica(English Letters) 2022年第6期35卷 1043-1054页

作者： Ashutosh sahu Ram sajeevan maurya Lavish kumar singh Tapas Laha Department of Mechanical Engineering School of Engineering and TechnologySharda UniversityGreater Noida 201310India Department of Metallurgy Engineering and Materials science Indian Institute of Technology IndoreIndore 453552India Department of Metallurgical and Materials Engineering Indian Institute of Technology KharagpurKharagpur 721302India

In the present study,Al_(86)Ni_(8)Y_(6) and Al_(86)Ni_(6)Y_(4.5)Co_(2)La_(1.5) bulk amorphous nanocomposites were synthesized by spark plasma sintering of milled melt spun ribbon *** as-cast ribbons were of near amorphous nature with minute amount of FCC Al embedded in the amorphous *** of the ribbons resulted in partial devitrifi cation due to mechanical *** milled ribbon particles were sintered in the temperature and pressure range of 300-500℃ and 500-700 MPa,*** was observed that nominal amount of amorphous phase was retained at 500℃ and 500 *** increase in sintering pressure and decrease in sintering temperature,the amount of crystalline phase evolution decreased,and maximum amount of amorphous phase was retained at 300℃ and 700 *** microstructure consisting of amorphous phase embedded with hard intermetallic phases led to increase in the nanohardness of Al_(86)Ni_(8)Y_(6) and Al_(86)Ni_(6)Y_(4.5)Co_(2)La_(1.5) as-cast ribbons from 3.26±0.59 GPa and 3.81±0.58 GPa to 6.06±0.70 GPa and 6.14±0.82 GPa,respectively,for the corresponding consolidated amorphous *** of the three and five component system bulk samples was 4.19±0.13GPa and 3.6±0.13 GPa,respectively.

关键词： Amorphous alloy Milled ribbon spark plasma sintering Nanohardness Internetallic compound

A review on high performance photovoltaic cells and strategies for improving their efficiency

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Frontiers in Energy 2022年第4期16卷 548-580页

作者： Muni Raj maurya John-John CABIBIHAN kishor kumar sADAsIVUNI kalim DEsHMUkH Mechanical and Industrial Engineering Department College of EngineeringQatar UniversityDoha 2713Qatar Center for Advanced Materials Qatar University Doha 2713Qatar Center for Advanced Materials Qatar UniversityDoha 2713Qatar New Technologies-Research Center University of West BohemiaPlzen 30100Czech Republic

The introduction of a practical solar cell by Bell Laboratory,which had an efficiency of approximately 6%,signified photovoltaic technology as a potentially viable energy *** efforts have been made to increase power conversion efficiency(PCE).In the present review,the advances made in solar cells(sCs)are *** and device engineering are described for achieving enhanced light absorption,electrical properties,stability and higher PCE in *** strategies in materials and coating techniques for large area deposition are further elaborated,which is expected to be helpful for realizing high-efficiency *** methods of lightharvesting in sCs via anti-reflecting coatings,surface texturing,patterned growth of nanostructure,and plasmonics are ***,progress in mechanical methods that are used for sun tracking are *** assistance of the above two protocols in maximizing the power output of sCs are discussed in ***,further research efforts needed to overcome roadblocks in commercialization were highlighted and perspectives on the future development of this rapidly advancing field are offered.

关键词： photovoltaic efficiency large area deposition light harvesting sun tracker