The PDF of the issue is available here (Dr. Kao's article can be found on the final page):
http://www.upenn.edu/almanac/volumes/v61/n15/pdf/112514.pdf
The PDF of the issue is available here (Dr. Kao's article can be found on the final page):
http://www.upenn.edu/almanac/volumes/v61/n15/pdf/112514.pdf