Thank you for sharing this article @sogata . But are you aware that your article is being plagiarized by another steemian here:

https://steemit.com/steemit/@asmaasema/how-effective-is-your-vote-check-it-now

Someone I followed resteemed your post and not long after I found the article above by accident. He rewrote your content but it is obvious that he took it from you. I just wanted to make you aware.