In Pragueon November 15, 2022 
Dear Conference Organizers, Technical Sponsors, Travel agencies, Airlines, Proceedings publishers and Participants:
The local organizing team has made the difficult choice to hold the conference entirely online in June 2023 after great discussion and consideration.
The regional organizing committee has been keeping a careful eye on the issue. Since a further significant increase in energy and maintenance costs is anticipated in January 2023 (hence the decision to delay the start of the spring semester until the end of January), it is impossible to estimate the costs associated with holding the conference. Even now, electricity costs in the Czech Republic increased by 62% in a month (see https://www.expats.cz/czech-news/article/czech-government-releases-guidelines- on-saving-energy-amid-highest-electricity-price-increase-in-eu). Several variables, including the weather, whether electricity must be supplied from the EU to Ukraine, and whether a new wave of Ukrainian refugees will arrive in Czechia during the winter, will affect the anticipated future price hike. As a result, if conference prices are set at this time, they might not be enough to pay the true costs of holding the conference in June 2023. Additionally, the cost of flight tickets is rising steadily, and there aren't many participants who can enter the Czech Republic without a visa.
We have come to the conclusion that it is not advisable to hold this conference in person at this time in June 2023. However, as the conference has already been postponed once due to the COVID pandemics, we don't want to do it again. As a result, we had to make the painful choice to hold the conference entirely online in June 2023.This is not a decision we have taken lightly, and we regret having to postpone an occasion that will foster tremendous collaboration value and provide a springboard for future endeavors. Our top objective, however, is to proactively take all safety and health precautions for the benefit of everyone present and the general public. In addition to this, an increasing number of presenters are now subject to travel limitations, which makes it harder for us to deliver the high-quality in-person experience for which this conference has become recognized over the past 25 years. The following conference will take place in person.
The registration costs and other cost-related issues will be updated in January 2023, while the conference website icnpaa.com will be updated very shortly. Update your submissions, please.
The organizing committee chairs, session organizers, keynote speakers, organizing committees, technical sponsors, and all other attendees are especially appreciated for their perseverance in adjusting to the difficult decision to have the conference completely online in June 27–30, 2023. We appreciate your flexibility as we work together to address this unprecedented situation.
Thank you for your continued support.
Sincerely, Local Organizers and Chairs
Dr. Michal Schmirler, Czech Technical University in Prague, Czech Republic
Dr. Vladimir Kulish, Czech Technical University in Prague, Czech Republic
Local Organizing CommitteeProf. Vladimfr Horak, University of Defence, Czech Republic V4 .....Prof. Pavel Safai'fk, Czech Technical University in Prague, Czech Republic ¥Dr. Tomas Hyhlik, Czech Technical University in Prague, Czech Republic

Dr. Zbynek Studeny, University of Defence, Brno, Czech Republic

Local Advisory Committee

Dr. Jiri Maxa, Brno University of Technology, Czech Republic
Mr. Petr Prokop, Czech Technical University in Prague, Czech Republic  f?.eJ/P
Ms. Katerina Houbova, Czech Technical University in Prague, Czech Republic
Ms. Hana Schmirlerova, Czech Technical University in Prague, Czech Republic,, I,

Seenith Sivasundaram