R.M.Rani , Dr.M.Pushpalatha. “Detecting Change in Activity or Identifying Failure Sensors in IOT Using Frequent Count Activity Matrix (FCAM) Algorithm”. International Journal of Advanced Science and Technology, Vol. 29, no. 06, May 2020, pp. 4804 -13, http://sersc.org/journals/index.php/IJAST/article/view/19403.