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The article offers facts about the Self Help programme. Self Help is engaged in a range of cost-effective programmes which enable communities to harness and utilise rainwater for both drinking and irrigation purposes. It will invest more than €250,000 on a series of water development projects in its new Eritrean project area at Elaberid, providing a water supply to nearly 25,000 people living in the locality.

A monaural complex tone is synthesized from 12 harmonically related pure tones, played in phase. In each of 12 segments, one of the tones (the target) is played out of phase so that the sequence of targets is increasing or decreasing in frequency. If the target is at least 30° out of phase, the targets are perceptually segregated. This tone-segregation by phase raises doubts concerning several current theories of pitch perception. The phenomenon is conjectured to be caused by the ear's nonlinear compressive transfer characteristic or by a temporal analysis of the stimulus. [ABSTRACT FROM AUTHOR]