Magnetospheric experiment: UK joins in

Faster Joins , Self - Joins and

We propose a new algorithm, called Stripe-join, for performing a join given a join index. Stripe-join is inspired by an algorithm called \Jive-join" developed by Li and Ross. Stripe-join makes a single sequential pass through each input relation, in addition to one pass through the join index and two passes through a set of temporary les that contain tuple identiiers but no input tuples. Stripe...

Chaos in magnetospheric radio emissions

A three-wave model of auroral radio emissions near the electron plasma frequency was proposed by Chian et al. (1994) involving resonant interactions of Langmuir, whistler and Alfvén waves. Chaos can occur in the nonlinear evolution of this three-wave process in the magnetosphere. In particular, two types of intermittency, due to either local or global bifurcations, can be observed. We analyze t...

Analysis of magnetospheric ELF/VLF wave amplification from the Siple Transmitter experiment

Controlled experiments with dedicated ground-based ELF/VLF (0.3–30 kHz) transmitters are invaluable in investigating nonlinear whistler mode wave-particle interactions in the Earth’s magnetosphere. The most productive such experiment operated between 1973 and 1988 near L= 4 at Siple Station, Antarctica. A major effort has been undertaken to digitize and preserve a significant portion of the his...

Magnetospheric Emissions from Extrasolar Planets Magnetospheric Emission from Extrasolar Planets

Art and Design Education in the UK

This paper seeks to identify the philosophical origins of the teaching of art and design and subsequently trace its incorporation into a teaching program in the UK. It briefly discusses the nature of its classical ‘drawing’ background and the conflicts in the debate as to what ‘design’ means. It then goes on to identify the cultural and political context which shaped the institutions, such as A...