YOUNG STELLAR NUCLEI IN LENTICULAR GALAXIES: NGC 5574 AND NGC 7457 1 O. K. Sil'chenko 2 Sternberg Astronomical Institute, Universitetsky Pr. ... The compact nuclei of the galaxies appear to be chemically distinct: in NGC 5574 the nucleus is distinguished by a higher than solar iron­to­magnesium ratio, and in NGC 7457 a drop of mean stellar met­ allicity by a factor of 2 exists between the nucleus and the bulge. ... The bulges in NGC 5574 and NGC 7457 have rather young stellar populations. ...

... 322, L29 ± L36 (2001) The 2dF QSO Redshift Survey ± V. The 10k catalogue S. M. Croom,1w R. J. Smith,2 B. J. Boyle,1 T. Shanks,3 N. S. Loaring,4 L. Miller4 and I. J. Lewis1 1 2 3 4 Anglo-Australian Observatory, PO Box 296, Epping, NSW 1710, Australia Liverpool John Moores University, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD Department of Physics, University of Durham, South Road, Durham DH1 3LE Department of Physics, Oxford University, 1 Keble Road, Oxford OX1 3RH Accepted 2001 March 7....

... 23 Algorithm fo r evalua tion of two burn maneuv ers using linearity Input information: ( t t E1 , rEI , v t1L , t E2 2L ( ) EI )T )T ­ ­ ­ ­ the time and the state vector of initial orbit for this time ; interval of possible thrusts for transition from initial orbit to the transfer on e; the time and the state vector of the target orbit for this time ; ... We cal culate the state vector for the initial orbit for the time t1a and the target one ­ for the time t2 a . ...