02337nas a2200289   4500000000100000000000100001008004100002260001200043653001600055653000900071653001400080653001400094100001600108700001800124700001900142700001700161700001700178700001800195700002500213700002100238245010600259856009900365300001000464490000600474520155300480022001402033       2016                            d  c06/201610a3D Printing10aTest10aFrequency10aStudent-T1 aAnilesh Dey1 aD K Bhattacha1 aD N Tibarewala1 aNilanjan Dey1 aAmira Ashour1 aDac-Nhuong Le1 aEvgeniya Gospodinova1 aMitko Gospodinov00aChinese-chi and Kundalini yoga Meditations Effects on the Autonomic Nervous System: Comparative Study  uhttp://www.ijimai.org/journal/sites/default/files/files/2016/05/ijimai20163_7_13_pdf_34001.pdf  a87-950 v33 aCardiac disease is one of the major causes for death all over the world. Heart rate variability (HRV) is a significant parameter that used in assessing Autonomous Nervous System (ANS) activity. Generally, the 2D Poincare′ plot and 3D Poincaré plot of the HRV signals reflect the effect of different external stimuli on the ANS. Meditation is one of such external stimulus, which has different techniques with different types of effects on the ANS. Chinese Chi-meditation and Kundalini yoga are two different effective meditation techniques. The current work is interested with the analysis of the HRV signals under the effect of these two based on meditation techniques. The 2D and 3D Poincare′ plots are generally plotted by fitting respectively an ellipse/ellipsoid to the dense region of the constructed Poincare′ plot of HRV signals. However, the 2D and 3D Poincaré plots sometimes fail to describe the proper behaviour of the system. Thus in this study, a three-dimensional frequency-delay plot is proposed to properly distinguish these two famous meditation techniques by analyzing their effects on ANS. This proposed 3D frequency-delay plot is applied on HRV signals of eight persons practicing same Chi-meditation and four other persons practising same Kundalini yoga. To substantiate the result for larger sample of data, statistical Student t-test is applied, which shows a satisfactory result in this context. The experimental results established that the Chi-meditation has large impact on the HRVcompared to the Kundalini yoga.  a1989-1660