Dr. Semmelweis and the discovery of handwashing

Dr. Ignaz Semmelweis was a Hungarian physician born in 1818 and active at the Vienna General Hospital during the 1840s. In 1847, the Ignaz Semmelweis made a breakthrough discovery: he discovered handwashing. Contaminated hands were a major cause of childbed fever and were often fatal by enforcing handwashing at his hospital he saved hundreds of lives. Childbed fever was a deadly disease affecting women that just have given birth. In Vienna General Hospital’s First Obstetrical Clinic, doctors’ wards had three times the mortality of midwives’ wards.

Wrangling and Visualizing Music Data

Introduction How do musicians choose the chords they use in their songs? Do guitarists, pianists, and singers gravitate towards different kinds of harmony? We can uncover trends in the kinds of chord progressions used by popular artists by analyzing the harmonic data provided in the McGill Billboard Dataset. This dataset includes professionally tagged chords for several hundred pop/rock songs representative of singles that made the Billboard Hot 100 list between 1958 and 1991.