Ajit Kumar

ORCID: 0000-0003-1014-2187
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Research Areas
  • Advanced Fiber Laser Technologies
  • Nonlinear Photonic Systems
  • Nonlinear Waves and Solitons
  • Photonic and Optical Devices
  • Magnesium Alloys: Properties and Applications
  • Aluminum Alloys Composites Properties
  • Optical Network Technologies
  • Laser-Matter Interactions and Applications
  • Bamboo properties and applications
  • Electromagnetic wave absorption materials
  • Titanium Alloys Microstructure and Properties
  • Natural Fiber Reinforced Composites
  • Advanced Antenna and Metasurface Technologies
  • Shape Memory Alloy Transformations
  • Erosion and Abrasive Machining
  • Metamaterials and Metasurfaces Applications
  • Spectroscopy Techniques in Biomedical and Chemical Research
  • Tribology and Wear Analysis
  • Photonic Crystals and Applications
  • Additive Manufacturing and 3D Printing Technologies
  • Additive Manufacturing Materials and Processes
  • Cold Atom Physics and Bose-Einstein Condensates
  • Plant Water Relations and Carbon Dynamics
  • Greenhouse Technology and Climate Control
  • Solar-Powered Water Purification Methods

University of Delhi
2024

King Fahd University of Petroleum and Minerals
2024

Indian Institute of Technology Indore
1996-2023

Jawaharlal Nehru University
2015-2023

GIET University
2022

National Institute of Technology Delhi
2022

Indian Institute of Science Bangalore
2022

Indian Institute of Technology Delhi
2012-2021

National Institute of Technology Patna
2021

Indira Gandhi National Open University
2008-2019

In the present work, biocompatible materials such as niobium (Nb), zinc (Zn) and calcium (Ca) have been blended with magnesium (Mg) to develop a novel biomaterial (BM) improved mechanical corrosion resistant properties. Powder metallurgy (PM) technique was used fabricate Mg based BM. The powder of all aforementioned were mixed homogenously in specific quantities create uniform composite component. order analyse influence process parameters on properties fabricated part, experiments performed...

10.1016/j.jma.2020.02.011 article EN cc-by-nc-nd Journal of Magnesium and Alloys 2020-05-30

The application of natural fibers as reinforcement in polymer composites has been continuously growing during the last few decades. These find diverse applications hostile environment where they are exposed to external attacks such solid particle erosion. Also, many respects, mechanical properties different their most important characteristics. Therefore, improvement erosion resistance and behavior prime requirements applications. Bamboo fiber which is rich cellulose, relatively inexpensive,...

10.1155/2011/592906 article EN cc-by International Journal of Polymer Science 2011-01-01

Electromagnetic interference (EMI) pollution has now become a subject of great concern with the rapid development delicate electronic equipment in commercial, civil, and military operations. There been surge pursuit light-weight, adaptable, effective, efficient EMI screening materials recent years. The present article addresses simple sensitive approach to synthesize core/shell carbon nanotube/MoS2 heterostructure supported on reduced graphene oxide (CNT/MoS2-rGO nanohybrid) as an...

10.1021/acsami.0c06219 article EN ACS Applied Materials & Interfaces 2020-08-13

Bamboo is a naturally occurring composite material which grows abundantly in most of the part world. It treated as because it has cellulose fibers imbedded lignin matrix. As cheap and fast-grown resource, with superior physical mechanical properties, bamboo offers great potential an alternative to wood. can widely substitute not only wood, but also plastics & other materials structural product applications through improvements processing technologies, innovation application scientific...

10.1177/097324700800400312 article EN Asia Pacific Business Review 2008-07-01

Mint has been used as a medicinal and aromatic plant since ancient times. Its leaves are for flavoring, spicing, mint oil, which is to treat several diseases. In order preserve this seasonal consumers during the year, it undergoes various technological treatments, such drying. The economy of production burdened considerably by energy costs To substitute high-cost fossil energy, hybrid photovoltaic-thermal (PVT) ultraviolet (UV)-stabilized polyethylene greenhouse dryer was developed lower...

10.1080/07373937.2010.547265 article EN Drying Technology 2011-06-29

This work reports a detailed study of reduced graphene oxide (rGO)-Fe3O4 nanoparticle composite as an excellent electromagnetic (EM) interference shielding material in GHz range. A rGO-Fe3O4 was synthesized using facile, one step, and modified solvothermal method with the reaction FeCl3, ethylenediamine graphite powder presence ethylene glycol. Various structural, microstructural optical characterization tools were used to determine its synthesis various properties. Dielectric, magnetic EM...

10.1088/1361-6528/aab87a article EN Nanotechnology 2018-03-21

In this study the mechanical and erosion wear behavior of bamboo fiber reinforce epoxy composites filled with Cement By-Pass Dust (CBPD) were studied. The effect CBPD content alkalization on various properties these was also investigated. Taguchi's orthogonal arrays are used for analysis experiential results. It identifies significant control factors influencing outlines interaction effects. Analysis variance (ANOVA) test has been performed measured data to find most affecting rate. Finally,...

10.4236/jsemat.2012.23024 article EN Journal of Surface Engineered Materials and Advanced Technology 2012-01-01

In this paper, starting with the Maxwell equations and corresponding nonlinear wave equation, we derive a pulse evolution equation for metamaterial cubic (Kerr) nonlinearity. The given model goes beyond commonly employed slowly evolving approximation (SEWA). dispersive properties of dielectric susceptibility magnetic permeability are accounted in accordance Drude model. Using propagation single-cycle 4-cycle studied numerically left-handed (LHMM) third-order

10.1364/josab.29.001330 article EN Journal of the Optical Society of America B 2012-05-21

In this paper, a study was carried out to evaluate the annual thermal and exergy performance of hybrid photovoltaic-thermal greenhouse dryer, located at IIT Delhi, India by considering various silicon non-silicon-based photovoltaic (PV) modules namely mono crystalline (c-Si), multi (mc-Si), nano silicon, amorphous Cadmium Telluride Copper Indium Gallium Selenide. The net electrical energy savings for these a, b, c d type weather conditions New Delhi has been calculated. Embodied outputs have...

10.1080/14786451.2012.751914 article EN International Journal of Sustainable Energy 2013-03-12

The present work investigates the effect of ultrasonic power (%) and time vibration on sintered density ultimate compressive strength (UCS) Mg15Nb3Zn1Ca fabricated using assisted conventional sintering (UACS). customized UACS setup was designed manufactured to conduct experimentations. A stepped horn assembly used for providing vibrations sample during sintering. Further, evaluate efficacy parameters, developed sinter composite material. study unveiled an increased UCS by increase in (%)....

10.1016/j.jma.2020.11.006 article EN cc-by-nc-nd Journal of Magnesium and Alloys 2020-12-25

Enhanced electrocaloric response in lead‐free 0.8Na 0.5 Bi TiO 3 ‐0.2SrTiO (NBT‐0.2ST) ceramics are investigated using an indirect approach based on Maxwell's relations over a wide operating temperature range. The effect (ECE) is obtained broad range with the maximum change ( T ) value reaching 0.75 K at working of 400 under electric field 35 kV cm −1 . EC coefficient () found to be 0.022 K·cm K. Energy storage density NBT‐0.2ST calculated and 0.36 J −3 393 High ECE (350–450 K) make it...

10.1002/pssa.201800786 article EN physica status solidi (a) 2019-01-03

In the present work, initially, microwave sintering was used to fabricate a magnesium-based metal matrix composite (MgMMCs) especially Mg3Zn1Ca15Nb, at same process parameters which were develop aforesaid material using conventional sintering. But, no improvement in results found, may be owing non-optimized of To carry out optimization parameters, first, range obtained this study. Sintering temperature (ST), heating rate (HR), and holding time (HT) selected as parameters. Additionally,...

10.1177/0954406220951236 article EN Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science 2020-08-20

The propagation characteristics of a single-cycle pulse, at $0.8\text{ }\ensuremath{\mu}\text{m}$ wavelength, are studied numerically in one spatial dimension. It is shown that Raman term does influence the by counteracting self-steepening effect.

10.1103/physreva.79.063807 article EN Physical Review A 2009-06-03

We theoretically investigate the propagation of surface plasmon polaritons in an amplifying plasmonic coupler (metal--amplifying dielectric--metal). study loss-compensated nonlinear stationary modes system by deriving coupled-mode equations for optical amplitudes, predicting existence a mode with broken symmetry gain values higher than characteristic threshold. analyze stability symmetric, antisymmetric, and nonsymmetric solving linearized small perturbations numerically integrating...

10.1103/physreva.91.043815 article EN Physical Review A 2015-04-09
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