Showing papers by "University of Johannesburg published in 1999"
TL;DR: In this article, the conditions to find periodic orbits of the two-disk dynamo system using an ellipsoid bounding condition were proved unsatisfactory and the conditions cannot be satisfied.
Abstract: The Rikitake two-disk dynamo system is a simplemodel to describe the earth's magnetic field. We derivethe conditions to find periodic orbits of this systemusing an ellipsoid bounding condition. We prove that the conditions cannot besatisfied.
32 citations
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TL;DR: This article extended the Svensson inflation forecast targeting framework with a convex Phillips curve and derived an asymmetric target rule, which implies a higher level of nominal interest rates than Svensson forward-looking version of the reaction function popularised by Taylor.
Abstract: This paper extends the Svensson inflation forecast targeting framework with a convex Phillips curve. An asymmetric target rule is derived, which implies a higher level of nominal interest rates than the Svensson forward-looking version of the reaction function popularised by Taylor. Extending the analysis with uncertainty about the output gap, it is found that uncertainty induces a further upward bias in nominal interest rates.
18 citations
TL;DR: A polygalacturonase-inhibiting protein (pgip) gene from Malus domestica cv Granny Smith apple fruit was cloned by degenerate oligo-primed polymerase chain reaction (PCR) and Inverse PCR, which has broad application to isolation of homologues of any gene for which some sequence information is known.
9 citations