If you cannot attend the conference on sites due to the Visa or international flight et al, you can attend on-line instead. The partial registration fee will be refunded (paid back after conference).

 The refund amount will be as follows:

*100 euro (student registrant)
*200 euro (full registrants/delegates).

 If you register for on-line (ONLY), the registration fee is listed as below:

*100 euro (full registrants/delegates, but not a speaker), excluding the paper.
*150 euro (full registrants/delegates, a speaker), excluding the paper.
*200 euro (full registrants/delegates , a speaker), including the paper.

The deadline for on-line registration will be also 30th July 2021 (after 30th July 2021, the registration will be closed). For one paper, at least one separate author needs to be registered.