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Effect of graphene and its derivatives on thermo-mechanical properties of phase change materials and its applications:a comprehensive review

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Frontiers in Energy 2022年第2期16卷 150-186页

作者： Sumit NAGAR kamal sharma A.K.PANDEY V.V.TYAGI Department of Mechanical Engineering GLA UniversityMathura(U.P)-281406India Research Center for Nano-Materials and Energy Technology(RCNMET) School of Engineering and TechnologySunway University47500 Selangor Darul EhsanMalaysia School of Energy Management Shri Mata Vaishno Devi UniversityKatra 182320India

Phase change materials(PCMs)play a leading role in overcoming the growing need of advanced thermal management for the storage and release of thermal energy which is to be used for different solar ***,the effectiveness of PCMs is greatly affected by their poor thermal ***,in the present review the progress made in deploying the graphene(Gr)in PCMs in the last decade for providing the solution to the aforementioned inadequacy is presented and discussed in *** and its derivatives((Gr oxide(GO),Gr aerogel(GA)and Gr nanoplatelets(GNPs))based PCMs can improve the thermal conductivity and shape stability,which may be attributed to the extra ordinary thermo-physical properties of ***,it is expected from this review that the advantages and disadvantages of using Gr nanoparticles provide a deep insight and help the researchers in finding out the exact basic properties and finally the applications of Gr can be *** this work,Gr and its derivatives based PCMs was characterized by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction spectroscopy(XRD),and scanning electron microscopy(SEM)by which crystal structure was known,phase was identified along with the knowledge of surface structure *** increase in the mass fraction(%)of the filler(Gr and its derivatives)led to even better thermo-physical properties and thermal *** thermal characterization was also done by differential scanning calorimetry(DSC),thermo gravimetric analysis(TGA)and thermal conductivity *** enthalpy of freezing and melting showed that Gr and its derivatives based PCMs had a very high energy storage capability as reflected in its various applications.

关键词： phase change materials(PCMs) graphene thermal conductivity characterization

维普期刊数据库

炭纤维/氨基化多壁碳纳米管/环氧树脂复合材料力学性能的分子模拟( 英文)

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新型炭材料 2014年第2期29卷 132-142页

作者： kamal sharma Mukul Shukla Mechanical Engineering Department Motilal Nehru National Institute of Technology Allahabad Uttar Pradesh 211004 India Department of Mechanical Engineering Technology University of Johannesburg Johannesburg South Africa

采用分子动力学模拟(MD)分析炭纤维/氨基化多壁碳纳米管/环氧树脂复合材料的力学性能。采用碳纳米管作为环氧树脂的主要增强材料以期提高三相复合材料的力学性能。建立固化的环氧树脂模型以提高碳纳米管和基体间的粘结强度。炭纤维体积... 详细信息

采用分子动力学模拟(MD)分析炭纤维/氨基化多壁碳纳米管/环氧树脂复合材料的力学性能。采用碳纳米管作为环氧树脂的主要增强材料以期提高三相复合材料的力学性能。建立固化的环氧树脂模型以提高碳纳米管和基体间的粘结强度。炭纤维体积分数设定为60%,碳纳米管体积分数为0.25%-5%。结果表明,碳纳米管体积分数从0.25%增加至5%时,沿炭纤维方向上的杨氏模量由92GPa提高至224.4GPa,抗张强度由1.35GPa提高至2.85GPa。

关键词：炭纤维分子模拟三相碳纳米管力学性能

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PARAMETER AND INTERACTION STUDY OF EDGE CRACK PROBLEM USING MESHFREE METHOD

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International Journal of Modeling, Simulation, and Scientific Computing 2012年第4期3卷 58-76页

作者： kamal sharma VIVEK BHASIN I.V.SINGH B.K.MISHRA K.K.VAZE Reactor Safety Division BARC TrombayMumbaiMaharastraIndia MIED IIT RoorkeeRoorkeeUttarakhandIndia

In this work,element free Galerkin method(EFGM)has been used to obtain the solution of edge crack problem under mechanical loads as it provides a versatile technique to model static as well as moving crack problems without any requirement of *** first,some techniques are presented for enriching the EFG approximations near the crack tip such as extrinsic and intrinsic *** enrichment involves the addition of solution form to the trial function,whereas the EFG basis is expanded to include few terms from crack tip solution in intrinsic *** from enrichment techniques,four basic techniques of smoothing meshless approximations near nonconvex boundaries are also presented such as diffraction,transparency,see through and wedge *** techniques are then used for the parameteric analysis of an edge crack problem under mode-1 loading and results obtained using different approaches are compared with each other as well as with exact *** these techniques,the extrinsic PU enrichment technique was found to be more accurate as compared to other *** PU enrichment technique has also been used for the analysis of a shear edge crack *** all these techniques,the value of mode-1 stress intensity factor and mode-2 stress intensity factor has been evaluated by interaction integral *** of crack orientation is also studied for different cases.

关键词： EFGM edge crack enrichment techniques meshfree.

Smart Grid: Future of Electrical Transmission and Distribution

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International Journal of Communications, Network and System Sciences 2020年第4期13卷 45-54页

作者： kamal Kant sharma Himanshu Monga Department of EE Chandigarh University Mohali India Department of ECE JNGEC Mandi India

For century, the need of change in the system of power grid is being felt and being considered as the most important change that we need in the modern era electrical system but before moving towards a new change the things in past should be kept in mind so that there are better chances of great and beneficial change. The purpose of this research is to investigate the changes need to be incorporated in a conventional system to make a system self-sufficient and automated in order to make Electrical Power system more reliable. This paper assesses the current one way power system that is needed to be changed and has tried to provide an overview of the changes that we need in the system. The paper has focused more on the smart grid system and has explained the importance of smart grid system in terms of efficiency, automation and decision making capability in case of faults occurred on primitive grids with the help of comparative studies. The paper also highlighted the results in form of comparison with conventional grids and threw some light on the vision, control and the application of the smart grid system that will provide a two way system to the electrical network of the country and will make the distribution and consumption of energy more efficient also which is going to increase the reliability and accuracy in the system.

关键词： Smart Grid Automatic Grid System Vision of Smart Grid Communication Technologies

The yins and yangs of ceramide

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Cell Research 1999年第1期9卷 1-10页

作者： kamal sharma YUFANG SHI(Department of Immunology, Jerome H.Holland Laboratory, American Red Cross, 15601 Crabbs Branch Way,Rockville, MD 20855) Department of Immunology Jerome H. Holland Laboratory American Red Cross Rockville

Since their discovery over 100 years ago, sphingolipids have caught the eyes and the imagination of *** science has made many new insights on the cell biology and day-to-day functions of many integral sphingolipids, especially those of ceramide. Ceramide is recognized as a vital second messenger in the signal transduction process mediated by receptors of many cytokines and growth factors.A great part of our current understanding of ceramide has been achieved from apoptosis-related studies, however recent data in the fields of immunology, endocrinology and neurobiology, also suggest a fundamental involvement of ceramide in the onset of diseases. Therefore, understanding the biology of ceramide could be a key to unraveling many biological mechanisms and provide information for the treatment of some common diseases.

关键词： Cermide sphingomyelinase signal transduction

Advancements in the Development of Various Types of Dye-Sensitized Solar Cells:A Comparative Review

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Energy Engineering 2021年第4期118卷 737-759页

作者： Sandhia Bai A.K.Amirruddin A.K.Pandey M.Samykano Muhammad Shakeel Ahmad kamal sharma V.V.Tyagi Department of Mechanical Engineering College of EngineeringUniversity Malaysia PahangPahang26300Malaysia Research Centre for Nano-Materials and Energy Technology School of Engineering and TechnologySunway UniversitySelangor47500Malaysia Higher Institution Centre of Excellence UM Power Energy Dedicated Advanced CentreUniversity of MalayaKuala Lumpur59990Malaysia Department of Mechanical Engineering Institute of Engineering and TechnologyGLA UniversityMathura281406India School of Energy Management Shri Mata Vaishno Devi UniversityKatraJammu and Kashmir182320India

The global increase in energy demand has resulted in the depletion of non-renewable resources and caused environmental ***,emerging renewable technologies are a potential solution to fulfil energy demand and mitigate the effect of global ***-cost solar energy harvesting technologies are most feasible *** solar cells technologies have been developed with improved overall performance and conversion ***,due to low cost and a wide range of applications,dye-sensitized solar cells(DSSCs)have been immensely focused on one of the most promising third-generation solar *** highest conversion efficiency of DSSC achieved after three decades of research is more than 14%,but the commercialization of this technology is still a *** this review paper,an attempt has been made to present the comparison of different articles published,that gives the in-depth study of recent developments in various types of DSSCs based on architectural assembly and physical *** overview of the limitations and challenges with their possible improvement strategies have also been *** review paper concludes that appropriate selection of electrolytes dramatically affects the performance of DSSC,and quasi-solid-state electrolyte proves to be a better ***,it also concludes that tandem structures are widely agreed with the approach to expand light utilization spectrum for an overall increase in its ***,still,the research is required,which could efficiently widen the applications of the DSSCs.

关键词： Dye-sensitized solar cells solar energy architectural assembly quasi-solid electrolyte tandem structures

A New Record on Flowering in Harar (<i>Terminalia chebula</i>Retz.) Seedling

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American Journal of Plant Sciences 2012年第5期3卷 693-695页

作者： kamal sharma Sanjeev Thakur Seema sharma Som Dutt sharma Dr. Y.S. Parmar University of Horticulture and Forestry Regional Horticultural and Forestry Research Station Hamirpur India Dr. Y.S. Parmar University of Horticulture and Forestry Regional Horticultural Research Station Kangra India

Harar (Terminalia chebula), a large deciduous tree belongs to family combretaceae. It grows naturally in greater part of India up to 1500 m elevation. Due to several alkaloids present in fruit, it is used as laxative, purgative and astringent for curing a number of ailments. Keeping in view its medicinal and tanning properties, the authors have been working for the last two decades on various aspects like propagation and development of promising strains of harar. Grafting/budding techniques have been standardized to produce true to type precocious plants which bear flower in two to three years. However, flowering has been observed in three months old seedling, which can be ascribed to biochemical and/or cellular changes. Early flowering is a rare incidence in tree seedlings which otherwise could be very useful for breeding and early evaluation of fruit species.

关键词： Terminalia chebula Early Flowering Seedling

Mechanical Property Estimation of Similar Weld using Ball Indentation Technique

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Journal of Minerals and Materials Characterization and Engineering 2012年第11期11卷 1095-1110页

作者： Harshit Kumar Khandelwal kamal sharma Rahul Chhibber Homi Bhabha National Institute Mumbai India Indian Institute of Technology Rajasthan Jodhpur India Reactor Safety Division Bhabha Atomic Research Centre Mumbai India

A weld joint is composed of three principal zones viz., base metal, Heat Affected Zone (HAZ), and weld zone. Thus, the variation in mechanical behavior exists not only among these zones, but also from point to point in each individual zone. Being destructive in nature, the conventional method of mechanical testing cannot successfully used to estimate the variation in the mechanical behavior at different zones of the weld joint. Moreover, the conventional method of mechanical testing cannot characterize the material using small amount of material. In this respect, Ball Indentation (BI) methodology was considered to be useful approach, since it can characterize the mechanical properties of a material using very small amount of material in non destructive manner. The present work is an attempt to characterize the variation in the mechanical properties among each zone (global variation), and from point to point in each zone (local variation) of the similar weld joint used in nuclear application using BI approach. For this purpose, the similar weld joint of two SS-304 LN pipe lines was investigated using BI approach.

关键词： Ball Indentation In Situ Similar Weld Joint Flow Properties Pressurized Water Reactor Reactor Pressure Vessel

Non-odontogenic hard palate cysts with special reference to globulomaxillary cyst

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Plastic and Aesthetic Research 2016年第1期3卷 302-305页

作者： Bharat Bhushan sharma Shweta sharma Arvind Jha kamal Deep sharma Jai Deep sharma Chattur Bhuj sharma Department of Radio-diagnosis SGT Medical CollegeGurgaon 122505India Department of ENT&Head&Neck Surgery PGIMER&RML HospitalNew Delhi 110001India Department of ENT&Head&Neck Surgery SGT Medical CollegeGurgaon 122505India Department of Orthodontics Sri Guru Ramdas Dental CollegeAmritsar 143006India Department of Orthodontics Himalyan Institute of Dental SciencesPaonta Sahib 173025India Department of Oral&Maxillofacial Surgery Deepak Dental CentrePathankot 145001India

Palatal cysts are always confusing by defining their exact nomenclature or conclusive *** of these presentations is globulomaxillary cyst which requires to be categorized under appropriate head for the management point of *** this entity appears to be of odontogenic in origin but because of its anatomical relation and histo-pathological background this is placed in non odontogenic *** the mechanism of its formation remains the same but this cyst cannot be mixed up with nasopalatine cyst as per their *** cyst appears as inverted pear shaped radiolucency in all radiological *** remains asymptomatic for a long time and rarely gets *** present a 29-year-old male who reported with one year history of asymptomatic right side hard palate *** was subsequently diagnosed as globulomaxillary cyst with the help of radiological modalities like computerized tomography and magnetic resonance *** article will highlight mainly the clinical and radiological features of these cysts with particular reference to globulomaxillary cyst which is our presenting case.

关键词： Palatal cyst globulomaxillary cyst non-odontogenic magnetic resonance imaging computerized tomography