9-Year Periodicity in the Meteorological Phenomena

Eighty-Eight Year Periodicity in Solar-Terrestrial Phenomena Confirmed

The existence of a 60-100 year periodic variation in solar and/or solar-terrestrial phenomena has been a matter of dispute for many years. A wide variety of data sets previously have been analyzed, and the results of the analyses have been interpreted as showing evidence ither for or against such a variation. However, all data sets that are proxy for solar wind in the ecliptic at 1 AU show vari...

Meteorological Phenomena in India

Lecture 9 Threshold Phenomena

Though our main technical result concerns random graphs in the G(n,p) model, let us mention other contexts in which threshold phenomena occur. One classical example is Percolation, an area started in physics. A typical question here is this: given a planar grid and 0 < p < 1. Create a graph by keeping each edge of the planar grid with probability p and removing each edge with probability 1-p. T...

Multiagent Meta-Level Control for Predicting Meteorological Phenomena

It is crucial for social systems to adapt to the dynamics of open environments. This adaptation process becomes especially challenging in the context of multiagent systems. In this paper, we argue that multiagent meta-level control is an effective way to determine when this adaptation process should be done and how much effort should be invested in adaptation as opposed to continuing with the c...

On the claimed 5.5-year periodicity in solar activity

Recently, Djurovic and Pâquet (1996) claimed to have found an oscillation with a period of about 5.5 years in several solar and solar-terrestrial parameters, in particular in solar activity as indicated by sunspot numbers. Since the temporal evolution of solar activity and solar-terrestrial environment is of great interest in many fields, we have examined their claim in detail. We show here tha...