The study of piezoelectric material in the past was in T-Domain form; however, no one has studied piezoelectric material in the S-Domain form. This paper will present the piezoelectric material in the transfer function or S-Domain model. S-Domain is a well known mathematical model, used for analyzing the stability of the material and determining the stability limits. By using S-Domain in testing stability of piezoelectric material, it will provide a new tool for the scientific world to study this material in various forms.
 Yu Wangi, Qiang Mia02, Michael Peche, "Health Monitoring of Hard Disk Drive Based on Mahalanobis Distance”, 2011 Prognostics & System Health Management Conference (PHM2011 Shenzhen)
 Peter Lyman and Hal R.Varian, "How much information?"
2003/index.htm, October 2003.
 Brian D. Strom, SungChang Lee, George W. Tyndall and Andrei
Khurshudov, "Hard Disk Drive Reliability Modeling and Failure
Prediction”, IEEE Transactions on Magnetics, Vol. 43, No. 9, September
2007, pp 3676-3684.
 W.Singjungreed, "Harddisk Failure Analysis Using Data Mining
Method”, Electrical Engineering of King Mongkutfs University of
Technology North Bangkok, 2007.
 Mueller, Scott (2011). Upgrading and Repairing PCs (20th ed.). Que.
 Data Clinic Knowledgebase: Data Recovery and Hard Disk reference
section, "Hard disk drive functionality”. http://www.dataclinic.it.
 Wikipedia the free encyclopedia, "Hard disk drive – Hard drive failure”,
 Hitachi Global Storage Technologies (Thailand) Ltd. Failure Analysis 1