Proof of research - contribute computing power to the network, and solve mathematical problems
http://wiki.gridcoin.us/Proof-of-ResearchProof of stake - consensus method for processing transactions / securing the network based on an investors stake in the network and age of the coins
https://en.wikipedia.org/wiki/Proof-of-stakeProof of work - consensus method for processing transactions / securing the network based on solving cryptographic hashes, depends on the hash rate of the equipment deployed for mining
Another method for consensus is Directed Acrylic Graphs and is used for Byteball and Iota.
Proof of concept - has nothing to do with mining or minting (used as a synonym for staking), this means a simplified model which proves that a methodology is feasible
Thanks for the references, I was looking for this. Because some new token from airdrops and bounties makes me confuse. Some of them makes this PoS and PoW as and advantages. Still learning on it. Thanks