TY JOUR TI TACTICAL AND TECHNICAL SPECIFICATIONS OF MODIFIED HYDROGELS FOR THERMAL PROTECTION AND EXTINGUISHING FIRES KW modified hydrogels KW variable frequency modulated potential KW fire tactics KW FDS model JO Problems of risk management in the technosphere AU Hajiyev, S.G. AU Ivanov, A.V. AU Ivakhnyuk, G.K. AU Krutolapov, A.S. PY 2016 IS 2016 PB Saint-Petersburg University of State Fire Service of Emercom of Russia