We describe Urukul, a frequency synthesizer based on direct digital synthesis (DDS), optimized for wave generate control in atomic, molecular and optical (AMO) physics experiments. The Urukul module is a part of the Sinara family of modular, open-source hardware designed for the ARTIQ quantum operating system. The Urukul has 4-channel, sub-Hz frequency resolution, controlled phase steps and accurate output amplitude control. The module is available in two population variants. This paper presents Urukul module construction and obtained characteristics.

Traditionally you are invited to acquaint yourselves with some abstracts of lectures submitted to the 40th Winter School on Vibroacoustical Hazards Suppressions. This national School is traditionally held at the turn of February and March and is organized in different places of Silesian Beskidy Mountains. This year it is again held in Szczyrk.

This year we celebrate the jubilee edition of the School. Because of this anniversary the conference apart from standard organizers, i.e. Upper Silesian Division of the Polish Acoustical Society and Institute of Physics - Science-Didactic Center at the Silesian University of Technology, has also a co-organizer - the Committee on Acoustics of the Polish Academy of Sciences. Moreover there are two splendid honorary patrons - Prof. Zbigniew Engel, president of the Committee on Acoustics of the Polish Academy of Sciences, and Prof. Andrzej Bluszcz, director of the Institute of Physics - Science-Didactic Center at the Silesian University of Technology.