Reviews of topical problems

A.V. Andreev “Optical superradiance: new ideas and new experiments” Sov. Phys. Usp. 33 (12) 997–1020 (1990)

V.A. Bazylev, N.K. Zhevago “Channeling of fast particles and associated phenomena” Sov. Phys. Usp. 33 (12) 1021–1046 (1990)

From the history of physics

M.A. El’yashevich, N.G. Kembrovskaya, L.M. Tomil’chik “Rydberg and the development of atomic spectroscopy (Centennial of J. R. Rydberg’s paper on the laws governing atomic spectra)” Sov. Phys. Usp. 33 (12) 1047–1060 (1990)

Methodological notes

B.A. Trubnikov “On the possible generation of cosmic rays in plasma pinches” Sov. Phys. Usp. 33 (12) 1061–1071 (1990)

G.A. Vardanyan, G.S. Mkrtchyan “A solution to the density matrix equation” Sov. Phys. Usp. 33 (12) 1072–1072 (1990)

A.G. Bershadskii “Large-scale fractal structure in laboratory turbulence, astrophysics, and the ocean” Sov. Phys. Usp. 33 (12) 1073–1075 (1990)

Personalia

L.M. Barkov, S.T. Belyaev, G.I. Dimov, E.P. Kruglyakov, A.P. Onuchin, D.D. Ryutov, A.N. Skrinskii, A.G. Khabakhpashev, B.V. Chirikov “Veniamin Aleksandrovich Sidorov (in celebration of his sixtieth birthday)” Sov. Phys. Usp. 33 (12) 1076–1077 (1990)

Book reviews

M.B. Menskii “Proceedings of the 5th Marcel Grossmann Conference on General Relativity” Sov. Phys. Usp. 33 (12) 1078–1079 (1990)

A.V. Chubukov “Symposium on Magnetism in Honor of Professor W. E. Henry” Sov. Phys. Usp. 33 (12) 1080–1080 (1990)

V.V. Osipov “Noise in physical systems” Sov. Phys. Usp. 33 (12) 1081–1082 (1990)