A self activating catalyst for treating heavy hydrocarbon feedstocks that comprises a calcined particle comprising a co-mulled mixture made by co-mulling inorganic oxide powder, molybdenum trioxide powder, and a nickel compound and then forming the co-mulled mixture into a particle that is calcined to thereby provide the calcined particle. The method include receiving a power offset parameter for an aperiodic SRS set by a base station through an higher layer, setting transmission power of the aperiodic SRS based transmission power on the power offset parameter, and transmitting the aperiodic SRS to the BS based on the set transmission power of the aperiodic SRS. The proximal end of the tip section is fixedly attached to the distal end of the catheter body.