The study showed that Ukrainian scientists are getting more and more disconnected from the Ukrainian scientific community, proving dangerous for the future of Ukraine and Ukrainian research.
The attack began hitting different districts of Kyiv in the early hours of Saturday, with more waves coming as the sun came up.
At least 571 people have received injuries during more than 560 incidents involving mines or explosive objects left behind by the fighting, the General Staff said on Telegram messenger.
Officials posted footage of rescue workers clambering through smoldering rubble. Bodies lay alongside slabs of concrete and twisted metal.
In a video address released on the anniversary of Russia's controversial announcement it was annexing 4 parts of Ukraine, Putin said the choice to join Russia was reinforced by local elections.
Russia launched six Iranian-made Shahed drones and 10 cruise missiles, with Ukraine's forces destroying six drones and six missiles before they hit their target, the Air Force said.
Russia and Ukraine have conducted regular exchanges of prisoners of war, as well as the bodies of dead soldiers, since the Kremlin launched its full-scale invasion in February 2022.
Ahead of Rosh Hashanah Israelis take trains from Poland to reach Uman in Ukraine.
During the operation there was a clash between Ukrainian special forces on boats and a Russian fighter jet, which was damaged and forced to retreat.