... Here you will find various documents I have written, or assisted in the writing of. ... Progress Report, 2003 . ... Winter, Jeffery Drilling, 2003 . ... Abstract: We apply a multilayer feed-forward back propagation artificial neural network to a sample of 380 subdwarf spectra classified by Drilling et al. (2002), showing that it is possible to use this technique on large sets of spectra and obtain classifications in good agreement with the standard. ... Chris Winter, 2007 . ...