Astronomy Reports -- March 2004 Volume 48, Issue 3, pp. 171-260 H2O Maser Emission in the Direction of Sagittarius B2: Results of Monitoring for 1982–1992 E. E. Lekht, O. Ramirez Hernandes, A. M. Tolmachev, and I. I. Berulis pp. 171-184 Full Text: PDF (821 kB) Neutron-Capture Elements in Halo, Thick-Disk, and Thin-Disk Stars: Neodymium L. I. Mashonkina, L. A. Kamaeva, V. A. Samotoev, and N. A. Sakhibullin pp. 185-199 Full Text: PDF (337 kB) Long-Term Monitoring of the Water-Vapor Maser in NGC 7538: 1993–2003 E. E. Lekht, V. A. Munitsyn, and A. M. Tolmachev pp. 200-209 Full Text: PDF (573 kB) Masses of Protostars with Methanol Protoplanetary Disks I. E. Val'tts and S. Yu. Lyubchenko pp. 210-218 Full Text: PDF (200 kB) Evolutionary Connection between Low-Mass Detached Binaries, Contact W UMa Systems, and Blue Stragglers A. V. Tutukov, G. N. Dremova, and M. A. Svechnikov pp. 219-228 Full Text: PDF (268 kB) The Influence of High-Energy Neutrinos on the Ejection of the Envelope of a Type-II Supernova I. V. Baikov and V. M. Chechetkin pp. 229-235 Full Text: PDF (218 kB) Light Curve and Neutrino Spectrum Emitted during the Collapse of a Nonrotating, Supermassive Star A. N. Baushev and G. S. Bisnovatyi-Kogan pp. 236-245 Full Text: PDF (223 kB) Topological Model for the Large Solar Flare of July 14, 2000 B. V. Somov, I. V. Oreshina, and G. P. Lubimov pp. 246-253 Full Text: PDF (376 kB) Active Longitudes and North–South Asymmetry of the Activity the Sun as Manifestations of Its Relic Magnetic Field A. V. Mordvinov and L. L. Kitchatinov pp. 254-260 Full Text: PDF (667 kB)