Erectile Dysfunction Causes and Symptoms. There are many causes of erectile dysfunction (impotence) and some include: 1  blood vessel diseases (such as peripheral vascular disease and others), 2  systemic disease, 3  hormonal imbalance, and. 4  medications (such as blood pressure and heart medications).
For the martial arts rank of Nidan, see Dan (rank). Nidan (sometimes known as Midan or Idan) was a Welsh priest and, according to some sources, a bishop, in the 6th and 7th centuries. He is now commemorated as a saint.
Heian Nidan. The Heian Series. The word Heian is a combination of Heiwan that means âPeacefulnessâ and Antei that means. âCalmness.â For this reason the meaning of the kata signifies a âPeaceful Mind.â The name. suggests that the student who has mastered the five Heian forms can be confident in his ability to.