Hi @Rochmady,
This is an old thread, so I’m going to close it, but I recommend joining this conversation about supporting RoR identifiers for affiliations. Currently without the RoR plugin OJS uses a plain-text field for affiliations, which means grouping authors by affiliations isn’t possible to do well (e.g. Simon Fraser University is different from SFU is different from Simon Fraser); RoR identifiers make it possible to group authors definitively with the same identifier.
If RoR doesn’t suit your needs (see the limitations in the mentioned thread), I’d suggest starting a new topic starting there.
Regards,
Alec Smecher
Public Knowledge Project Team