To visualize my latest results regarding the Yin-Yang symbol, I created the following video. The video shows different versions of the Yin-Yang symbol, depending on the daylight hours for latitudes ranging from -90 to 90 degrees.
When referring to this Yin-Yang video, please cite this paper, which contains more information about the mathematical daylight model used for creating the different Yin-Yang symbols:
Stefan Jaeger (2011). A Geomedical Approach to Chinese Medicine: The Origin of the Yin-Yang Symbol, Recent Advances in Theories and Practice of Chinese Medicine, Prof. Kuang Haixue, Heilongjiang University of Chinese Medicine, China (Ed.), ISBN: 978-953-307-903-5, InTech, Available from: http://www.intechopen.com/articles/show/title/a-geomedical-approach-to-chinese-medicine-the-origin-of-the-yin-yang-symbol