3 research outputs found
Vertical variance analysis of geomagnetic disturbance during solar cycle 23
The geomagnetic field consists of temporal variations induced primarily by the variations in the solar wind and embedded interplanetary magnetic field. 34 stations across the Earth have been categorized in this paper on the basis of their geomagnetic disturbance during solar cycle 23 (1997-2008). The Vertical Variance (VV) disturbance quantifier has been used to develop such profile. The latitude profile of geomagnetic disturbance has been found to exhibit a typical 'Knee' behaviour, with the fluctuation content seen to rise sharply beyond this critical latitude determined near 52Ā° latitude. The increasing trend in geomagnetic fluctuation content however is seen to end around the auroral oval beyond where abrupt variations has been observed indicating the transition from closed to open magnetic field lines. The physical mechanism behind this trend has also been explored. The VV analysis of geomagnetic disturbance has revealed prominent features of solar wind ā magnetosphere coupling
Vertical variance analysis of geomagnetic disturbance during solar cycle 23
300-309The geomagnetic field consists of temporal variations induced primarily by the variations in the solar wind and embedded interplanetary magnetic field. 34 stations across the Earth have been categorized in this paper on the basis of their geomagnetic disturbance during solar cycle 23 (1997-2008). The Vertical Variance (VV) disturbance quantifier has been used to develop such profile. The latitude profile of geomagnetic disturbance has been found to exhibit a typical āKneeā behaviour, with the fluctuation content seen to rise sharply beyond this critical latitude determined near 52Ā° latitude. The increasing trend in geomagnetic fluctuation content however is seen to end around the auroral oval beyond where abrupt variations has been observed indicating the transition from closed to open magnetic field lines. The physical mechanism behind this trend has also been explored. The VV analysis of geomagnetic disturbance has revealed prominent features of solar wind ā magnetosphere coupling
Sustainable Electronic Materials: Reversible Phototuning of Conductance in a Noncovalent Assembly of MWCNT and Bioresource-Derived Photochromic Molecule
Tuning the microstructure, conductance,
band gap of a single molecule
with an external stimuli such as light have vital importance in nanoscale
molecular electronics. Azobenzene systems are inimitable light responsive
molecules suitable for the development of optically modulated materials.
In this work we have demonstrated the development of an optically
active Multiwalled Carbon Nanotube (MWCNT)-hybrid material by the
noncovalent functionalization of azo based chromophore derived from
cardanol, a bioresource material. This photoresponsive noncovalent
hybrid shows transācis photoisomerization induced switching
of conductance. We report this as the first example in which the photochromic
assembly developed from a bioresource material exhibited tunable conductivity.
We expect that this novel photoswitchable hybrid with reversible conductance
may have potential applications in nanoscale molecular electronics,
solar cells, OLEDs, etc