Zora Ljoljic has joined Melles Griot as general manager of its laser group in Carlsbad, Calif.   . . .   L. Joseph Huss, vice president of human resources for Gould Electronics Inc., has been named president and CEO of the Ohio-based company, which produces printed circuit materials and optoelectronic products. He will succeed C. David Ferguson, who is retiring and who will continue in a consulting capacity with the company.