Reviews of topical problems

K.N. Mukhin, O.O. Patarakin “The pion-pion interaction (review of experimental data)” Sov. Phys. Usp. 24 161–186 (1981)

A.P. Levanyuk, V.V. Osipov “Edge luminescence of direct-gap semiconductors” Sov. Phys. Usp. 24 187–215 (1981)

Physics of our days

Ya.B. Zel’dovich “Vacuum theory: a possible solution to the singularity problem of cosmology” Sov. Phys. Usp. 24 216–230 (1981)

From the history of physics

L.M. Nemenov “The history of the development of the cyclotron over fifty years (1930-1980)” Sov. Phys. Usp. 24 231–240 (1981)

Meetings and conferences

E.N. Yakovlev “The problem of metallic hydrogen advances and prospects” Sov. Phys. Usp. 24 241–242 (1981)

V.S. Berezinskii “The neutrino astronomy of high energies: sources and fluxes” Sov. Phys. Usp. 24 242–244 (1981)

B.A. Dolgoshein “Possibility of acoustic detection of neutrinos in the ocean” Sov. Phys. Usp. 24 244–244 (1981)

Personalia

A.A. Ansel’m, V.N. Gribov, I.T. Dyatlov, L.B. Okun’, O.I. Sumbaev “Vladimir Mikhailovich Shekhter (Obituary)” Sov. Phys. Usp. 24 245–246 (1981)

Kh.P. Keres, K.A. Piragas, A.A. Sokolov, F.I. Fedorov, M.F. Shirokov “Anatolii Evgen’evich Levashev (Obituary)” Sov. Phys. Usp. 24 247–248 (1981)

A.A. Abrikosov, L.P. Gor’kov, I.E. Dzyaloshinskii, A.I. Larkin, A.B. Migdal, L.P. Pitaevskii, I.M. Khalatnikov “Vadim L’vovich Berezinskii (Obituary)” Sov. Phys. Usp. 24 249–250 (1981)