1. Structural Materials Programme Advanced Materials Research Centre, SIRIM Bhd, Lot 34 Jalan Hi Tech 2/3, Kulim Hi Tech Park, 09000 Kulim, Kedah, Malaysia;, Email: afian@sirim.my
2. Structural Materials Programme Advanced Materials Research Centre, SIRIM Bhd, Lot 34 Jalan Hi Tech 2/3, Kulim Hi Tech Park, 09000 Kulim, Kedah, Malaysia