Conveners
Technical Session 05: Plenary Talk 04 & Track 04 Oral Presentations (1st half)
- U.D. Goswami (Dibrugarh University)
Description
Gravity and Cosmology, Plasma Physics, Nuclear Physics, Non-linear dynamics, Space and Atmospheric Physics (& Plenary Talk 3)
Presentation materials
The coronavirus disease (COVID-19) was first observed in December 2019 in the Wuhan Province of China and then it spread throughout the world. It affected the whole world in the most devastating way possible. In this paper, a nonlinear differential equation-based mathematical model is proposed to describe the spread dynamics of COVID-19 with the consideration of some important factors like...
In this paper, a fractional dynamical system is considered involving instantaneous impulses and non-local initial conditions. The fractional derivative is taken in Caputo sense with order
Abstract
The atmospheric boundary layer (ABL) is the lower part of the atmosphere, which is in continuous interaction with Earth’s surface due to friction and heating or cooling. The ABL extends upward from the surface to a height that ranges from 100-3000m. The ABL is often turbulent, with a strong diurnal cycle of temperature, wind, and other factors, particularly over land and ice...
Clouds occur both horizontally and vertically and are one of the most significant atmospheric constituents which play a vital role in the alteration of meteorological phenomena in a region. They can alter the climate by trapping the emitted longwave radiation from the earth, which warms the environment or by reflecting back the incoming solar radiation into space, cooling the atmosphere....
Abstract:
A crucial and fundamental problem in ionospheric physics is the ionosphere's dependency on solar activity. This dependence provides information that is necessary to comprehend the ionosphere's changes and its processes. Here in this work, ionospheric electron densities and fof2 is utilized to characterize large-scale ionosphere responses during 2015 geomagnetic storm. With the data...
Patterns emerge in spatially extended systems at all scales, from astronomical to micrometer. The appearance of galaxies in a spiral, elliptical, or irregular form, the patterns formed by a starving colony of slime molds, wind-swept sand patterns in rivers and deserts, patterns in zebra and snow leopards are a few examples. The hexagonal pattern in Rayleigh-Benard experiment and spiral wave in...
The well-known one-dimensional wave equation for a vibrating string holds good only for slowly varying waves with the motion being confined in a plane. Furthermore, it is assumed that the strain is uniform and small. Here we generalize the wave equation for the vibration of a string under non-uniform tension and arbitrary initial deformation.
In recent years, theoretical and numerical studies have been carried out on the excitation of collision-less shocks due to moving charge-density objects in both electron-ion plasma [1] and dusty plasma [2]. However, it is well-established that a dusty plasma can have dust grains of opposite polarity depending on the size of the grains and hence the characteristics of potential shock structures...
The study of black hole shadows after the discovery of the M87 black hole by the Event Horizon Telescope (EHT) has gained major interest recently. In this work, we have studied the shadows of a renormalization group improved (RGI) black hole system surrounded by two types of plasma media, viz homogeneous and inhomogeneous plasma. We have found that the associated free parameter
The Earth system is composed of the atmosphere, hydrosphere, geosphere, and biosphere. The mass of the Earth system remains constant, however, there is a redistribution of mass between the compartments. This mass redistribution gets perturbed by the variations in the precipitations induced by climate change. The surface of the Earth responds elastically to these mass variations and it can be...
The need for a small scale portable neutron source is always immense. The inertial electrostatic confinement (IEC) device is one such device which uses electric field to produce neutron through D-D or D-T fusion [1,2]. In CPP-IPR the maiden IECF device uses deuterium plasma to produce neutron in the order of 10^7 n/s in triple grid cylindrical geometry [3]. The electric field produced due to...
Tropical Cyclones (TCs) are one of the most significant weather phenomena in the Earth's lower atmosphere that causes a variety of damages and large scale destruction to lives and property due to violent winds, heavy rain (torrential rainfall) and storm surges. TCs, also referred to as hurricanes in the Atlantic Ocean and eastern Pacific Ocean and typhoons in the western Pacific, is a low...
