The TeX Family in 2009
Jim Hefferon and Karl Berry
Many mathematicians routinely use TeX and its variants to write mathematics, but many of these users do not routinely update their TeX skills as progress is made in the TeX progams. The authors describe some of this progress and explain how the typical user can take advantage of these improvements.
Time-frequency Analysis of Musical Rhythm
Xiaowen Cheng, Jarod V. Hart, and James S. Walker
Gabor transforms, or spectograms, can be used to graphically represent time-frequency structure patterns. Continuous wavelet transforms are a related notion, leading to the notion of a scalogram. The authors review these notions and apply them to analyze musical rhythm and its interaction with melody.