Nickel pyridine 2-thiolate (Ni(PyS)3(-)) has shown good stability and activity as a H2 generation catalyst for use in solar energy storage. The experimentally proposed catalytic pathway is explored using DFT calculations. Free energy changes along the reaction coordinate, spin states, localization of charge and geometry of the intermediates were explored. Calculations were performed using Gauss...

To better understand the geomagnetic conditions and particularities of solar cycles 23 24, we present analysis from morphological variations activities parameters IMF-Bz, interplanetary electric field (E), proton density (N), Dst (disturbance storm time), Polar cap (PC) indices (PCN PCS), activity index aa. The occurrences different classes established by Zerbo et al. (2012), through daily aver...

It is generally believed that the low-frequency variability of climatic parameters seems to be connected to solar cycles. The principal periodicities are: 11-year (Schwabe), 22-year (Hale), 33-year (Bruckner) and 80–100year (Gleissberg) cycles. The main heliophysical factors acting on climate, the biosphere and the atmosphere are solar irradiance, the intensity of solar and galactic cosmic rays...

Determined systematic differences in the overall shapes of successive 11-year modulation cycles (1946–1995) and similarities in the shapes of alternate 11-year cycles seem to be related to the 22-year magnetic cycle and to the polarity reversals of the polar magnetic field of the Sun. This different behaviour of the odd and even solar cycles that are the two parts of the 22-year periodicity is ...

Facular emission is one of the major contributors to long-term solar irradiance variations. Reconstructions of past facular variations, however, are strongly hampered by the lack of reliable proxies, particularly on time-scales longer than a solar cycle. We consider the five potential facular proxies with records covering more than 40 years. By suitably weighting and combining them we create a ...

Solar activity has a cyclic nature with the ~11-year Schwabe cycle dominating its variability on interannual timescale. However, solar cycles are significantly modulated in length, shape and magnitude, from near-spotless grand minima to very active maxima. The ~400-year-long direct sunspot-number series is inhomogeneous quality too short study robust parameters of long-term variability. cosmoge...

The damages and logical failures in dierent parts of a satellite may occur during a solar event, when a bulk of solar energetic particles approaching the Earth. During solar events, these particles may cause extensive damages which are even permanent (hard errors). A way of damage reduction is designing a proper coating as the fuselage. As protons are the major component of solar particles and ...