A Scottish dance group is only as good as its leader and its players. Tony & Donald, the organisers of Scotland's Ceilidh Band, come with a 20-year track record in the Scottish traditional music scene.Few other organisers can provide this depth of expertise and insider-knowledge on how to deliver a memorable performance along with a great party atmosphere. We had a fantastic ceilidh.ony & Donald, the organisers of Scotland's Ceilidh Band, come with a 20-year track record in the Scottish traditional music scene. Few other organisers can provide this depth of expertise and insider-knowledge on how to deliver a memorable performance along with a great party atmosphere. We had a fantastic ceilidh.
Torrefaction is a thermal process to convert biomass into a coal-like material, which has better fuel characteristics than the original biomass. Torrefied biomass is more brittle, making grinding easier and less energy intensive.
Rarefaction is the reduction of an item's density, the opposite of compression. Like compression, which can travel in waves, rarefaction waves also exist in nature. A common rarefaction wave is the area of low relative pressure following a shock wave. Rarefaction waves expand with time; in most cases rarefaction waves keep the same overall profile at all times throughout the wave's movement: it is a self-similar expansion. Each part of the wave travels at the local speed of sound, in the local m