Reviews of topical problems

R.V. Jolos, E.A. Kolganova “Phase transitions in atomic nuclei” Phys. Usp. 64 325–343 (2021)

M.M. Markina, P.S. Berdonosov, V.A. Dolgikh, K.V. Zakharov, E.S. Kuznetsova, A.N. Vasil’ev “Francisites as new geometrically frustrated quasi-two-dimensional magnets” Phys. Usp. 64 344–356 (2021)

G.M. Zinovjev, A.M. Snigirev “Multiparton distribution functions in quantum chromodynamics” Phys. Usp. 64 357–369 (2021)

Physics of our days

A.M. Zheltikov “In search of lost time: attosecond physics, petahertz optoelectronics, and quantum speed limit” Phys. Usp. 64 370–385 (2021)

Instruments and methods of investigation

I.D. Novikov, S.F. Likhachev, Yu.A. Shchekinov, A.S. Andrianov, A.M. Baryshev, A.I. Vasyunin, D.Z. Wiebe, T. de Graauw, A.G. Doroshkevich, I.I. Zinchenko, N.S. Kardashev, V.I. Kostenko, T.I. Larchenkova, L.N. Likhacheva, A.O. Lyakhovets, D.I. Novikov, S.V. Pilipenko, A.F. Punanova, A.G. Rudnitsky, A.V. Smirnov, V.I. Shematovich “Objectives of the Millimetron Space Observatory science program and technical capabilities of its realization” Phys. Usp. 64 386–419 (2021)

Personalia

E.B. Aleksandrov, A.F. Andreev, M.V. Arkhipov, V.E. Zakharov, L.M. Zelenyi, S.V. Ivanov, E.L. Ivchenko, L.P. Pitaevskii, M.V. Sadovskii, R.A. Suris, A.M. Shalagin, I.A. Shcherbakov “Nikolai Nikolaevich Rosanov (on his 80th birthday)” Phys. Usp. 64 420–421 (2021)

I.S. Aranson, A.V. Gaponov-Grekhov, V.E. Zakharov, V.A. Zverev, E.A. Kuznetsov, A.G. Litvak, V.I. Nekorkin, A.S. Pikovsky, O.V. Rudenko, A.M. Sergeev, Ya.G. Sinai, L.Sh. Tsimring “Mikhail Izrailevich Rabinovich (on his 80th birthday)” Phys. Usp. 64 422–424 (2021)

Physics news on the internet

Yu.N. Eroshenko “Physics news on the Internet (based on electronic preprints)” Phys. Usp. 64 425–426 (2021)