Hydrodynamical and radiative modeling of temporal H{\alpha} emission V/R variations caused by a discontinuous mass transfer in binaries

H{\alpha} emission V/R variations caused by a discontinous mass transfer in interacting binaries with a rapidly rotating accreting star are modelled qualititatively for the first time. The program ZEUS-MP was used for a non-linear 3-D hydrodynamical modeling of a development of a blob of gaseous material injected into an orbit around a star. It resulted in the formation of an elongated disk with a slow prograde revolution. The LTE radiative transfer program SHELLSPEC was used to calculate the H{\alpha} profiles originating in the disk for several phases of its revolution. The profiles have the form of a double emission and exhibit V/R and radial velocity variations. However, these variations should be a temporal phenomenon since imposing a viscosity in given model would lead to a circularization of the disk and fading-out of given variations.Comment: accepted for a publication in Astronomical Journa

B[e] Phenomenon in a Binary System V2028 Cyg

We present a preliminary analysis of our five-years observation campaign of the B[e] stellar system V2028 Cyg (MWC 623). The time variability of spectral features is described

Oborový manuál pro prevenci a minimalizaci odpadů:Obecný manuál prevence a minimalizace odpadu

Obecný manuál pro prevenci a minimalizace odpadů popisuje a vysvětluje jednotlivé kroky v projektu prevence. Odvolává se na přijaté dokumenty a ověřené metodiky, vytváří rámec pro oborové manuály, které mohou vzniknout pro potřeby konkrétní činnosti a služby. Obecná příručka má sloužit managementu podniků a pověřeným pracovníkům při hledání, volbě a zavádění preventivních opatření na ochranu ŽP do každodenní činnosti a rozhodovacích procesů