From the ediorial board

M.S. Aksenteva “In memory of Boris Borisovich Kadomtsev” Phys. Usp. 41 842–842 (1998)

Reviews of topical problems

M.R. Trunin “Surface impedance of HTSC single crystals in the microwave band” Phys. Usp. 41 843–863 (1998)

Physics news on the internet

Yu.N. Eroshenko “Physics news on the Internet (based on electronic preprints)” Phys. Usp. 41 864–864 (1998)

Reviews of topical problems

I.K. Kamilov, Kh.K. Aliev “Ultrasonic studies of the critical dynamics of magnetically ordered crystals” Phys. Usp. 41 865–884 (1998)

D.N. Klyshko “Basic quantum mechanical concepts from the operational viewpoint” Phys. Usp. 41 885–922 (1998)

M.B. Menskii “Decoherence and the theory of continuous quantum measurements” Phys. Usp. 41 923–940 (1998)

Methodological notes

Yu.I. Hovsepyan “Some notes on the relativistic Doppler effect” Phys. Usp. 41 941–944 (1998)