VIZIANAGARAM: ARISTON-09, the 2-day technical symposium, organised by JNTU-K (Vizianagaram campus), concluded on Tuesday. K. Padma Raju, Director of Industry, Institute Interaction, Placement and Training, B. Prabhakar Rao, Director of Institute of Science and Technology and V. Ramachandra Raju, Principal of the college attended the valedictory function.