January 2011

Polyaniline based anticorrosive and anti-molding coating

  Polyaniline (PAni) was synthesized by miniemulsion polymerization. One coating solution of poly (epichlorohydrine-co-ethylene oxide) (ECO) and another of ECO and PAni mixture were prepared in a mixture of solvents and then applied on cast iron and stainless steel coupons using spin coating technique. The efficiency of these coatings to retard the environmental rust formation was studied as...

Author(s): Sambhu Bhadra, Nikhil K. Singha and Dipak Khastgir

January 2011

Modified exponentially weighted moving average (EWMA) control chart for an analytical process data

  This article introduces modified exponentially weighted moving average (modified EWMA) control chart. The modified EWMA control chart is very effective in detecting small and abrupt shifts in monitoring process mean. This chart is based on modified EWMA control chart statistic, which is a correction of EWMA chart statistic and it is free from inertia problem. The advantage of using modified EWMA chart is its...

Author(s):   Alpaben K. Patel and Jyoti Divecha