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The publisher, Scientific Research Publishing, has other journals, as well. Some of them (Applied Mathematics, Journal of Modern Physics, Biosciences*, Journal of Cancer Therapy**, etc.) also appear to follow the publish things that were already published, but dont mention that principle.
On the organizations web site, we found barely any identifying or location information. The contact page says Name: Scientific Research Publishing, Inc. USA and lists an email address but we have not found any such corporation in the USA, and email sent to that address has produced no reply. The web site is registered to an organization in Wuhan, China.
Scientific Research Publishing, also known as scirp.org, also organizes conferences. Discussions in the blogosphere [see this one, for example and for pointers to others], for whatever those are worth, suggest that some of those conferences, too, are full of mystery.