This paper introduces an improvement to a currently published algorithm to compute both Lucas " sister " sequences V k and U k. The proposed algorithm uses Lucas sequence properties to improve the running time by about 20% over the algorithm published in .
Wettability and interface microstructure were studied for Nb-containing melts in the contact with ceramic oxide materials of Al 2 O 3-SiO 2 system. Ni-40.5 at.%Nb and Au-(0-20) at.%Nb alloys were investigated as prospective alloys for high temperature brazes. Ceramic samples ranged in composition from pure Al 2 O 3 to pure SiO 2. The wettability was… (More)