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In this article we describe a series of projects designed to supply families in rural Bolivia with heat for their cooking needs using simple technology to derive biogas from a mixture of animal manure and water. The novelty is that the adaptation of the anaerobic fermentation process to the climatic conditions at 4000 m above sea level has, for the

We report on initial results from the first phase of Exercise #1 of the asteroFLAG hare and hounds. The asteroFLAG group is helping to prepare for the asteroseismology component of NASA's Kepler mission, and the first phase of Exercise #1 is concerned with testing extraction of estimates of the large and small frequency spacings of the low-degree p

Many barred galaxies show a set of symmetric enhancements at the ends of the stellar bar, called the ansae, or ``handles'', of the bar. In this poster, we make a quantitative analysis of the occurrence of ansae in barred galaxies, making use of The de Vaucouleurs Atlas of Galaxies by Buta and collaborators. We find that ˜40% of SB0s show ansae in

Aims: We present an analytic approximate seismic inversion scheme for damped transverse coronal loop oscillations based on the thin tube and thin boundary approximation for computing the period and the damping time. Methods: Asymptotic expressions for the period and damping rate are used to illustrate the process of seismological inversion in a

Accurate determination of the rotation rate in the radiative zone of the Sun from helioseismic observations requires rotational frequency splittings of exceptional quality as well as reliable inversion techniques. Here we present inferences based on mode parameters calculated from 2088 day MDI, GONG, and GOLF time series that were fitted to