Luke J. Bowman

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The San Vicente volcano in central El Salvador has a recurring and destructive pattern of landslides and debris flows occurring on the northern slopes of the volcano, and in recent memory, there have been at least seven major destructive debris flows. There has been no known attempt to study the inherent stability of these slopes and determine the factors(More)
This paper describes a project to investigate the odour of sewage sludge after anaerobic digestion. The impact of air stripping on the odour of liquid sludge and on the quality of the dewatered product was evaluated at a full-scale sludge treatment installation. A continuous and a batch air-stripping mode were tested. Odour samples were collected during air(More)
The purpose of this project is to determine what characteristics an active volcanic system should exhibit in order to be considered ‘open-vent.’ As we have debated there seems to a broad spectrum of definitions describing the degree of openness. In one definition open-vent can simply mean that the magma within the system is exposed to the open atmosphere.(More)
The manufacture of miniature Stirling cycle cryocoolers, using standard micro-machining techniques and materials has been pursued by the authors [1]. A MEMS based cryocooler would allow integration of a cryogenic cooling system directly into a cryoelectronic device. Resonant bossed diaphragms were proposed as the means to sweep the working gas in the(More)
....................................................................................................................... vii 1.0 Introduction ........................................................................................................... 1 1.1 Debris Flow Hazards in El Salvador ................................................................... 2(More)
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