This letter addresses a robust adaptive control for the synchronization method based on a modified polynomial observer (slave system) which tends to follow exponentially the chaotic Colpitts circuits brought back to a topology of the Chua oscillator (master system) with perturbations. The...

This paper discusses if the Olymipic Games presented a change- not change along the lines of South Koreas leap towards democracy after the Seol Olympics, but some small shift- and how the nature of its Communist rulers dictated its behaviour and its reaction to its events. The author also look...

The hydrocarbons sector has become one of the most dynamic economic activities in the Bolivian economy and the main driver of improved export performance and international reserve accumulation. The central role of the hydrocarbons sector in the economy is attributable to the high levels of...

This paper formulated a short-run model, with an explicit role for monetary policy, for analyzing world oil and gas markets. The model described carefully the parameters of these markets and their vulnerability to business cycles. Estimates showed that short-run demand for oil and gas was price-...

We consider temporal aggregation of stationary and nonstationary time series with short memory, long memory and antipersistence, within the framework of fractional autoregressive processes. Asymptotically, long memory and antipersistence are preserved whereas short memory components vanish. In...

The article introduces a concept of probabilistic ecological competition from the aquatic hyacinth perspective, which often helps to track and analyze the sustainability of different species involved in the ecological system. A case study is presented to investigate the impact of the pH content...