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A review on the current research on microwave processing techniques applied to graphene-based supercapacitor electrodes:An emerging approach beyond conventional heating

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Journal of Energy Chemistry 2022年第11期31卷 252-282,I0008页

作者： rajesh kumar Sumanta Sahoo Ednan Joanni rajesh kumar singh Department of Mechanical Engineering Indian Institute of TechnologyKanpur 208016Uttar PradeshIndia School of Chemical Engineering Yeungnam UniversityGyeongsanGyeongbuk 38541Republic of Korea Centre for Information Technology Renato Archer(CTI) Campinas 13069-901Brazil School of Physical and Material Sciences Central University of Himachal Pradesh(CUHP)KangraDharamshala 176215HPIndia

The various methods for microwave processing of materials exhibit numerous advantages,such as short processing times,high yield,expanded reaction conditions,high reproducibility,and high purity of ***-assisted synthesis strategies have been widely adopted for the preparation of highperformance graphene-based materials for supercapacitor *** oxides,mixed metal oxides,metal hydroxides,layered double hydroxides,carbon nanotubes and conducting polymers are some of the main materials which have been added to graphene derivatives for advanced composite/hybrid *** review article first provides a brief introduction and an overview of microwave heating and its advantages for processing graphene-based electrode *** that,a systematic survey of recently published research on microwave irradiation-assisted processing is presented,focusing on:(i)transformation of graphite/graphite oxide into graphene/graphene oxide by exfoliation and reduction;(ii)formation of graphene derivatives in various liquid and gaseous media;(iii)modification of graphene derivatives with various metal oxides/hydroxides,carbon nanotubes,and conducting polymers for use in *** challenges and future perspectives for microwave-assisted processing of graphene-based materials for cutting-edge supercapacitor electrode applications are also summarized in the conclusion.

关键词： Microwave irradiation Graphene derivatives Reduction/Exfoliation Supercapacitor Energy

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A review on synthesis of graphene,h-BN and MoS2 for energy storage applications:Recent progress and perspectives

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Nano Research 2019年第11期12卷 2655-2694页

作者： rajesh kumar Sumanta Sahoo Ednan Joanni rajesh kumar singh Ram Manohar Yadav Rajiv kumar Verma Dinesh Pratap singh Wai Kian Tan Angel Perez del Pino Stanislav A.Moshkalev Atsunori Matsuda Department of Eletrical and Electronic Information Engineering Toyohashi University of Technologys1-1 HibarigaokaTempaku-chaToyohashiAichi 441-8580Japan Department of Applied Chemistry Indian Institute of Technology(ISM) Dhanbad826004JharkhandIndia Centre for Information Technology Renato Archer(CTI) Campinas 13069-901Brazil School of Physical and Material Sciences Central University of Himachal Pradesh(CUHP)KangraDharamshala 176215HR India Department of Plhysics VSSD CollegeKanpur 208002India International College Osaka University1-2 MachikaneyamachoToyonaka shiOsaka 560-0043Japan Department of Physics and Milermium Institute for Research in Optics(MIRO) University of SantiagoAvenida Ecuador 3493Estacion CentralSantiago 9170124Chile Institute of Liberal Arts and Sciences Toyohashi University of Technology1-1 HibarigaokaTempaku choToyohashiAichi 441-8580 Japan Instituto de Ciencia de Materiales de Barcelona Consejo Superior de Irvestigaciones Cientificas(ICMAB-CSIC)Campus UABBllaterra08193 BarcelonaSpain Centre for Semiconductor Components and Nanotechnology(CCS Nano) Uniersity of Campinas(UNICAMP)Campinas 13083-870Brazil

The significance of graphene and its two-dimensional(2D)analogous inorganic layered materials especially as hexagonal boron nitride(h-BN)and molybdenum disulphide(MoS2)for“clean energy”applications became apparent over the last few years due to their extraordinary *** this review article we study the current progress and selected challenges in the syntheses of graphene,h-BN and MoS2 including energy storage applications as supercapacitors and *** substrates/catalysts(metals/insulator/semiconducting)have been used to obtain graphene,h-BN and MoS2 using different kinds of *** most widespread methods for synthesis of graphene,h-BN and MoS2 layers are chemical vapor deposition(CVD),plasma-enhanced CVD,hydro/solvothermal methods,liquid phase exfoliation,physical methods *** research has shown that graphene,h-BN and MoS2 layered materials modified with metal oxide can have an insightful influence on the performance of energy storage devices as supercapacitors and *** review article also contains the discussion on the opportunities and perspectives of these materials(graphene,h-BN and MoS2)in the energy storage *** expect that this witen review article including recent research on energy storage will help in generating new insights for further development and practical applications of graphene,h-BN and MoS2 layers based materials.

关键词： graphene norganic layered materials hierarchical structures energy storage supercapacitor battery

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Optimal site selection for a hospital using a fuzzy extended ELECTRE approach

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Journal of Management Analytics 2016年第2期3卷 115-135页

作者： Pravin kumar rajesh kumar singh Prerna Sinha Delhi Technological University DelhiIndia-110042 Management Development Institute GurgaonIndia-110042 Tilkamanjhi Bhagalpur University BhagalpurBiharIndia-812007

About two thirds of the population in India lives in *** is an acute shortage of health centers in rural *** are not located uniformly across different regions of *** areas are also not well connected with cities due to a lack of ***,the demand for super specialty hospitals is greater in rural *** paper has analyzed the health requirement in a prominent Indian state,Bihar,in terms of population *** purpose of this study is to illustrate the hospital site-selection problem by using the fuzzy extended elimination and choice expressing reality(ELECTRE)*** attributes considered for site selection in this paper are cost,proximity,population characteristics,availability of human resources,accessibility,environment,*** findings of the study will be of great value to the health ministry and policy makers in taking judicious decision s while selecting the site for a new hospital or health center.

关键词： site selection multicriteria decision-making fuzzy sets ELECTRE

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A nonautonomous mat hematical model to assess the impact of algae on the abatement of atmospheric carbon dioxide

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International Journal of Biomathematics 2021年第7期14卷 227-264页

作者： Pankaj kumar Tiwari rajesh kumar singh Debaldev Jana Yun Kang Arvind kumar Misra Department of Basic Science and Humanities Indian Institute of Information Technology Bhagalpur 813210 India Government Shahid Kedamath P.G.College Mauganj Rewa 486331India Department of Mathematics&SRM Research Institute SRM Institute of Science and Technology Kattankulathur 603203 Tamil NaduIndia Science and Mathematics Faculty Arizona State University Mesa AZ 85212USA Department of Mathematics Institute of Science Banaras Hindu UniversityVaranasi 221005India

The world's oceans have played an important role in sequestering atmospheric carbon dioxide through solubility and the action of *** of atmospheric carbon dioxide by photoautotrophic algal cultures has the potential to diminish the release of carbon dioxide into the atmosphere,thereby helping to alleviate the trend toward global *** work investigates the role of algae in controlling the level of atmospheric carbon *** Rank Correlation Coefficients(PRCCs)technique is used to address how the concentration of atmospheric carbon dioxide is affected by changes in a specific parameter disregarding the uncertainty over the rest of the model *** related to algal growth are shown to significantly reduce the level of atmospheric CO_(2).Further,we explore the dynamics of nonautonomous system by incorporating the seasonal variations of sonic ecologically important model *** nonautonomous system exhibits globally attractive positive periodic solution,and also the appearance of double periodic solution is ***,by letting the seasonally forced parameters as almost periodic functions of time,we show almost periodic behavior of the *** findings suggest that the policy makers should focus on continuous addition of nutrients in the ocean to accelerate the algal growth thereby reducing the level of carbon dioxide in the atmosphere.

关键词： Mathematical model algae atmospheric CO2 sensitivity analysis:seasonality periodic solution

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Efficiency measurement of fertilizer-manufacturing organizations usingFuzzy data envelopment analysis

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Journal of Management Analytics 2017年第3期4卷 276-295页

作者： Pravin kumara rajesh kumar singh Ravi Shankar Department of Mechanical Engineering Delhi Technological UniversityDelhiIndia Management Development Institute GurgaonIndia Department of Management Studies Indian Institute of Technology DelhiDelhiIndia

The aim of the paper is to benchmark the performance of the Indian fertilizermanufacturing organizations based on the ranking of efficiencies using a fuzzy data envelopment analysis(FDEA).FDEA has been used to find the relative efficiency and ranking of the fertilizer-manufacturing *** last few years’data have been converted into the fuzzy inputs and outputs as minimum,mean,and maximum values,*** performance of the fertilizer manufacturing organizations is based on the output maximization model of *** frontier organizations set the benchmark for the lagging organizations for further improvement in the *** method can also be used to incorporate the data of the several years for multiple inputs and outputs instead of consideration of data of only one *** proposed approach in this study may help organizations to improve its efficiency to fulfill its goal.

关键词： benchmarking data envelopment analysis(DEA) fuzzy sets efficiency measurement decision-making units(DMUs) Yager index

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Traffic Engineering and Quality of Service in Hybrid Software Defined Networks

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China Communications 2024年第2期21卷 96-121页

作者： Samiullah Mehraban rajesh kumar Yadav IOT Lab Department of Computer Science&EngineeringDelhi Technological UniversityDelhi 110042India

For Future networks, many research projects have proposed different architectures around the globe;Software Defined Network(SDN) architectures, through separating Data and Control Layers, offer a crucial structure for it. With a worldwide view and centralized Control, the SDN network provides flexible and reliable network management that improves network throughput and increases link utilization. In addition, it supports an innovative flow scheduling system to help advance Traffic Engineering(TE). For Medium and large-scale networks migrating directly from a legacy network to an SDN Network seems more complicated & even impossible, as there are High potential challenges, including technical, financial, security, shortage of standards, and quality of service degradation challenges. These challenges cause the birth and pave the ground for Hybrid SDN networks, where SDN devices coexist with traditional network devices. This study explores a Hybrid SDN network’s Traffic Engineering and Quality of Services Issues. Quality of service is described by network characteristics such as latency, jitter, loss, bandwidth,and network link utilization, using industry standards and mechanisms in a Hybrid SDN Network. We have organized the related studies in a way that the Quality of Service may gain the most benefit from the concept of Hybrid SDN networks using different algorithms and mechanisms: Deep Reinforcement Learning(DRL), Heuristic algorithm, K path partition algorithm, Genetic algorithm, SOTE algorithm, ROAR method, and Routing Optimization with different optimization mechanisms that help to ensure high-quality performance in a Hybrid SDN Network.

关键词： DRL hSDN QoE QoS SDN TE

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Corrosion of Snails (Gastropods) in Acidic Environment and Their Protection

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Journal of Surface Engineered Materials and Advanced Technology 2019年第1期9卷 1-10页

作者： rajesh kumar singh Veena kumari Deepmala Department of Chemistry Jagdam College Jai Prakash University Chhapra India Department of Zoology Deoghar College Deoghar India

Snails’ protection is essential because this species is to maintain a balanced ecology of water sources. They occur in rivers as well as ponds and balance the pH level of water. But these sources of water are contaminated by effluents, pollutants, acid rain, particulates, biological wastes etc. They can change the pH of water. Water is absorber of carbon dioxide and it converts carbon dioxide into carbonic. Other above mentioned wastes also increase the concentration of H+ ions in water. They produce hostile environment for snails. The outer part of snails is made of CaCO3. It produces chemical reaction in acidic medium and corrosion reaction is accelerated, and thus deterioration starts on the surface of snails. This medium makes their survival become miserable. For this work, corrosion of the snails’ study in the pH values of water is 6.5 in H2CO3 environment. The corrosion rates of snails were calculated by gravimetric methods and potentiostat technique. Aloe Vera was used for corrosion protection in acidic medium. The surface adsorption phenomenon was studied by Langmuir isotherm. Aloe Vera formed thin surface film on the interface of snails which adhered with chemical bonding. It was confirmed by activation energy, heat of adsorption, free energy, enthalpy and entropy. The results of surface coverage area and inhibitors efficiency indicated that Aloe Vera developed a strong protective barrier in the acidic medium.

关键词： Corrosion Snails Aloe Vera Carbonic Acid Potentiostat Thin Film Formation

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Dual PPAR delta/gamma agonist offer therapeutic potential for Alzheimer's disease

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Neural Regeneration Research 2024年第6期19卷 1175-1176页

作者： Ian Steinke Meenakshi singh rajesh Amin Department of Drug Discovery and Development Auburn UniversityAuburn AlabamaALUSA

The increasing incidence of Alzheimer's disease(AD)in the aging population,indicates the critical need for the development of novel targeted molecular therapies for ameliorating AD ***,clinical and preclinical evidence demonstrates that peroxisomal proliferator activating receptors(PPAR)agonists regulate energy and lipid homeostasis in models of diabetes,as well as improve spatial memory in animal models of AD(Khan et al.,2019).

关键词： Alzheimer clinical homeostasis

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Application of Response Surface Methodology for Analysing and Optimizing the Finned Solar Air Heater

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Journal of Thermal Science 2024年第3期33卷 985-1009页

作者： Vineet singh Vinod singh YADAV Vaibhav TRIVEDI Manoj kumar Niraj kumar Department of Mechanical Engineering School of Engineering&TechnologyIFTM UniversityMoradabadUttar PradeshIndia Department of Mechanical Engineering NITUttarakhandPauriUttarakhandIndia Department of Electronics and Communication Engineering Jaypee Institute of Information TechnologyNoidaUttar Pradesh201309India

In this research paper,a solar air heater with triangular fins has been experimentally analysed and ***,an experimental set-up of a solar air heater having triangular fins has been developed at the location of 28.10°N,78.23°*** heat transfer rate through fins and fins efficiency has been determined by the Finite Difference Method model *** experimental data and modeled data of response parameters have been optimized in MINITAB-17 software by the Response Surface Methodology *** creating the response surface design,three input parameters have been selected namely solar intensity,Reynolds number,and fin base-to-height *** range of solar intensity,Reynolds number,and fin base-to-height ratio is 600 to 1000W/m^(2),4000 to 6000,and 0.4 to 0.8 *** response surface design has been analyzed by calculating the outlet temperature,friction factor,Nusselt number,fin efficiency,thermal performance factor,and exergy *** optimum settings of input parameters:solar intensity is 1000 W/m^(2);Reynolds number is 4969.7,and the fin base to height ratio is 0.6060,on which these response:namely outlet temperature of 92.531℃,friction factor of 0.2350,Nusselt number of 127.761,thermal efficiency of 50.836%,thermal performance factor of 1.4947,and exergy efficiency of 8.762%.

关键词： solar air heater optimization fins exergy response surface methodology air

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Effect of cooling media on bead geometry,microstructure,and mechanical properties of wire arc additive manufactured IN718 alloy

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Advances in Manufacturing 2024年第1期12卷 124-149页

作者： Parveen kumar Satish kumar Sharma Ratnesh kumar Raj singh Department of Mechanical Engineering Thapar Institute of Engineering and TechnologyPatialaPunjab147004India

This work aims to present and explore thermal management techniques for the wire arc additive manufacturing(WAAM)of IN718 *** heat can be mitigated via air or water *** this study,the material was deposited under four different heat-input conditions with air or water *** air cooling,the layer is deposited in a normal atmospheric air environment,whereas with water cooling,the material is deposited inside a water tank by varying the water *** validate the air and water cooling thermal management techniques,IN718 single-pass and multilayer linear walls were deposited using the bidirectional gas metal arc welding based WAAM setup under four different heat input *** the deposition of single layers,the temperature profiles were recorded,and the geometric and microstructural features were *** multilayer wall structures,the mechanical properties(hardness,tensile strength,and elongation)were determined and assessed using the corresponding microstructural features explored through scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),and electron backscatter diffraction(EBSD)*** microstructure observed through SEM analysis in the building direction was found to be nonhomogenous compared with that in the deposition ***,water cooling was found to govern bead characteristics,such as wall width and *** grain size and anisotropy of the mechanical properties also decreased in the water-cooled ***,water cooling is an economical and efficient method to mitigate excessive heat accumulation in WAAM-deposited IN718.

关键词： Air cooling Water cooling IN718 Bead characteristics Microstructure Electron backscatter diffraction(EBSD)

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