2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/106847GW Vir variables are the pulsating members in the spectroscopic class of PG 1159 stars. In order to understand the characteristic differences between pulsating and non-pulsating PG 1159 stars, we analyse FUSE spectra of eleven objects, of which six are pulsating, by means of state-of-the-art NLTE model atmospheres. The numerous metal lines in the FUV spectra of these stars allow a precise determination of the photospheric parameters. We present here preliminary results of our analysis.4 pages, 3 figures, proceedings of the PhD School "Astrophysics of Variable Stars", eds. C. Sterken and C. Aerts, ASP Conference Series Vol. 349Astrophysicstext