A5103464771- Fatigue and fracture mechanics
- Ionosphere and magnetosphere dynamics
- Metal Forming Simulation Techniques
- Numerical methods in engineering
- Solar and Space Plasma Dynamics
- Dust and Plasma Wave Phenomena
- Metallurgy and Material Forming
- Silicon Carbide Semiconductor Technologies
- Semiconductor materials and devices
- High-Velocity Impact and Material Behavior
- Non-Destructive Testing Techniques
- Earthquake Detection and Analysis
- Hydrogen embrittlement and corrosion behaviors in metals
- Geomagnetism and Paleomagnetism Studies
- Engineering Structural Analysis Methods
- Material Properties and Failure Mechanisms
- Structural Integrity and Reliability Analysis
- Welding Techniques and Residual Stresses
- Probabilistic and Robust Engineering Design
- Electrostatic Discharge in Electronics
- Advancements in Semiconductor Devices and Circuit Design
- Nuclear Materials and Properties
- Magnetic confinement fusion research
- Nuclear reactor physics and engineering
- Composite Material Mechanics
Institute of Space Technology
2023-2025
Techno India Group (India)
2025
Homi Bhabha National Institute
2022-2024
Space Science Institute
2024
Bhabha Atomic Research Center Hospital
2024
Bhabha Atomic Research Centre
2011-2023
Government College University, Lahore
2018-2021
Zhejiang Ocean University
2019
Purdue University West Lafayette
1998-2003
We report recent measurements of the drift velocity electrons parallel to basal plane in 6H and 4H silicon carbide (SiC) as a function applied electric field. The dependence low field mobility saturated on temperature are also reported. velocities at room approximately 1.9/spl times/10/sup 7/ cm/s 6H-SiC 2.2/spl 4H-SiC.
Electrostatic solitary waves (ESWs) are frequently detected by Cluster and Magnetospheric Multiscale missions within Earth's magnetosheath. Recent findings indicate that the observed ESWs exhibit typical parallel half-widths ranging from 10 to 100 m, corresponding 1–10 Debye lengths, along with amplitudes of electrostatic potential varying 200 mV. Motivated above observations, in this study, we investigated formation magnetosheath using a theoretical model. In model, considered...
Cold ions of ionospheric origin have been observed in the Earth's magnetosphere, and it has argued that these cold greatly influenced magnetospheric dynamics. In addition to ions, electrons are also aforesaid environment. Moreover, double layers detected by various spacecraft missions terrestrial magnetosphere. Specifically, structures can occur inside reconnection exhaust at magnetopause, regulate magnetic energy released during reconnection, control electron ion heating. this article, we...
Abstract The utilization of the Cairns distribution serves as a vital tool for characterizing nonthermal attributes commonly observed in space plasmas. In these intricate plasma environments, extensive measurements have been conducted to monitor fluctuations inherent perturbed electromagnetic (EM) field and associated Poynting flux, specifically concerning kinetic Alfvén waves (KAWs). Traditionally, attributed gyroradius correction terms within framework Maxwellian distributed However, our...
We report the design and fabrication of UMOSFETs on 4H-SiC with specific on-resistances 105.1 m/spl Omega/ cm/sup 2/ at a current density 100 A/cm/sup blocking voltage 5,050 V. These devices incorporate an extended self-aligned p-bottom implant to protect gate oxide from high electric fields. A novel shadow mask was developed shield sidewalls any unwanted implant. are also first post-oxidation anneal (POA) in nitric (NO) improve inversion layer electron mobility. single zone JTE (junction...
Applying the separate spin evolution-quantum hydrodynamic model incorporating Coulomb exchange interaction, instabilities of upper hybrid mode and beam driven due to passing electron in a polarized degenerate plasma are studied. It is found that not only changes growth rate these modes but also gives birth new spin-dependent wave (spin acoustic wave) real frequency spectrum. Further, Bohm potential interaction effects significantly affect spectra mode. Other parameters like streaming speed...
Spectra of magnetosonic waves are studied by taking account spin-up and spin-down electrons as two different fluids. It is found that the electron spin effect modifies dispersions perpendicular obliquely propagating even without considering magnetization current effect. may be noted previously in these appeared only due to magnetization. Furthermore, consideration separate evolution gives rise existence a new dependent mode, i.e., magnetoacoustic mode along with fast slow modes. also...
Abstract The objective of this present work was to predict the strength distribution bi-modular cylindrical ceramic specimen from that another based on Weibull statistical theory. In order do so, initially, semi-analytical expression for effective volume and surface bar loaded in flexure were derived. addition, scaling ratio one flexural loading configuration with various modulus made available. Elaborate experimentation numerical simulations carried out verify analytical model. Generally,...
ABSTRACT In solar physics, there is a decades-old conundrum that still unsolved. Why the temperature of corona so much larger than surface Sun? To solve this, various approaches have been adopted far, but they certain limitations. present analysis, we invoke standard Vlasov model and steady-state Poynting theorem to unlock mysterious coronal heating mechanism in terms inertial kinetic Alfvén waves whose electromagnetic energies turn into heat during wave–particle interaction. The plasmas...
This article presents a numerical solution of three-dimensional cracks using coupled EFGM and FEM. The FEM adequately handles problems without discontinuities but faces severe limitations in solving crack growth problems, while does fairly well handling such problems. Hence, has been used region near the whereas utilized rest region. In interface/transition region, coupling scheme known as mixed-mode interpolation is to obtain shape functions. These simulations show that results obtained by...
The dispersion relations and Landau damping of Alfvén waves in kinetic inertial limits are studied temperature anisotropic Cairns distributed plasma. In the case (KAWs), it is found that real frequency enhanced when either electron perpendicular or non-thermal parameter Λ increases. For (IAWs), slightly affected by anisotropy Λ. Besides frequency, rate KAWs reduced IAWs, enhance reduce depending upon wavelength. These results may be helpful to understand dynamics IAWs space plasmas where...