I don't think we are given enough information to say whether they are dependent on each other or not. However, I did dissagree with the premise the article made that the omniscience was dependent on omnipotency, because it implied that the only way God knows the future is that He thoroughly controls the future. And that would appear to deny man free will.
You are definitely correct about that. It would deny free will.
Thanks, DTN. Signing off for now.