In this article we apply numerical methods to the research of the notion that control specialists are familiar with, i.e. controllability. The main novelty of this article is the research methodology that fully considers lower bounds of the manipulated variables and their upper limitations....

This paper addresses the issue of conservatism in the stability robustness bound obtained by the Lyapunov matrix equation solution. Ellipsoidal set-theoretical approach is employed to improve the bound on the interval uncertainty of an asymptotically stable linear system for robust stability....

We study the linearized stability of a discontinuous solution of a multidimensional hyperbolic system of conservation laws by linearizing the system around the basic solution; the resulting linearized system has discontinuous coefficients and involves nonconservative products. We propose a...

Today the Internet and the World Wide Web (WWW) are on the cusp of a paradigm shift. Up to now most actions in the WWW are sorts of human–computer interaction, but the introduction of the eXtensible Markup Language (XML) changed the perception. The Internet will be seen as a great space of...

This paper aims to analyse the seasonality in New Zealand tourism demand from Australia and the USA using spectral analysis. Tourism demand is divided into four different categories depending on the tourists’ visiting purposes as registered in the customs cards upon their arrivals in New...

This paper shows that in the almost four decades from January 1965 through to December 2003, US stock prices closely followed the 4-year Presidential Election Cycle. In general, stock prices fell during the first half of a Presidency, reached a trough in the second year, rose during the second...