  Semi-Detached binary stars are very important systems for the precise
determination of astrophysical parameters and the analysis of mass transfer and
loss mechanisms between the components. In this study, the light curve analysis
of some semi-detached systems (RV Pic and AS Eri), which light changes are
obtained by the Transiting Exoplanet Survey Satellite (TESS), was performed.
The astrophysical parameters of the systems were obtained. In addition,
oscillational properties of the systems were investigated, and the mass
transfer and the loss amount of such stars are discussed and compared with
observational data.
