National Journal 2011 2011 Supawadee Boonyachut and Chai Sunyavivat, (2011), “Hospital Directional Sign : Color and Font”, Journal of the National Research Council of Thailand Vol 43, No. 1, January – June, pp 13-32. Supawadee Boonyachut and Chamnarn Tirapas, (2011), “Shophouse: Quality of Living and Improvement” Journal of the National Research Council of Thailand Vol 43, No.2, July- December, pp 161-181. Supawadee Boonyachut, Krisnaphol Wattanawanyoo and Chai Sunyavivat, (2011), “Two flea market forms: economic and tourist flea market” Journal of the National Research Council of Thailand Vol 43, No.2,July- December , pp 125-141.