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The paper describes a radio-linked short-period seismometer network now operating in Scotland and recording on analogue magnetic tape. The network will be used as a permanent network for time-term refraction studies, and for monitoring the minor seismic activity within the area. The magnetic tapes may be digitized in the laboratory, processed in a computer, and the network used as an array of 100-km aperture. The aperture allows fine resolution between beams for determining apparent velocity and azimuth of teleseisms.

There is overwhelming and compelling evidence that control efforts for STI have a major role to play in the prevention of HIV transmission. Community-based randomized controlled trials are set as the highest standard of evidence for showing the efficacy of STI interventions to prevent HIV transmission. The negative results of recent randomized controlled trials have cast doubt on the positive findings of the Mwanza study. Deeper analysis of the result of these trials has improved understanding of the role of STI interventions and augmented the wealth of evidence provided by numerous epidemiological and biomedical studies. Apart from the biological impact of effective treatment of curable STIs on HIV transmission, clinical services also support the reduction of HIV-risk behaviors. STI interventions should limit the scale of the impending epidemics in Asia and Eastern Europe, depending on the priority that they are given by governments and major donor agencies.

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