Reviews of topical problems

D.K. Belashchenko “Does the embedded atom model have predictive power?” Phys. Usp. 63 1161–1187 (2020)

L.P. Babich “Relativistic runaway electron avalanche” Phys. Usp. 63 1188–1218 (2020)

Instruments and methods of investigation

P. Mazarov, V.G. Dudnikov, A.B. Tolstoguzov “Electrohydrodynamic emitters of ion beams” Phys. Usp. 63 1219–1255 (2020)

Methodological notes

A.V. Belinsky “Wigner's friend paradox: does objective reality not exist?” Phys. Usp. 63 1256–1263 (2020)

Personalia

V.M. Agranovich, E.B. Aleksandrov, S.N. Bagaev, I.V. Grekhov, A.G. Zabrodskii, S.V. Ivanov, E.L. Ivchenko, V.V. Kveder, B.V. Novikov, R.A. Suris, V.B. Timofeev, I.A. Shcherbakov “Aleksandr Aleksandrovich Kaplyanskii (on his 90th birthday)” Phys. Usp. 63 1264–1265 (2020)

Physics news on the internet

Yu.N. Eroshenko “Physics news on the Internet (based on electronic preprints)” Phys. Usp. 63 1266–1267 (2020)