A test of a new intervention or treatment on people for. detecting. -Tolerability. -Safety. -Efficacy. A Clinical trial is defined as a prospective study. comparing the effect and value of intervention. (s) against a control in human beings.
In fact, whether the DVD players play AVI videos or not, it depends on the DVD player model, the AVI video codec or the AVI video resolution/size: 1  Most DVD players only accept MPEG-2 in standard VOBs. 2  Though some newer DVD players can play AVI files, it only plays AVI which is encoded with DivX. However, AVI is a container video format which may encoded with different video codecs like DivX, Xvid, MPEG-4, H.263, WMV, MPEG-1 and etc.
With the release of Windows 8 and Windows 8 Pro, Microsoft made the decision to remove DVD playback, and forego the inclusion of Blu-ray playback. Whereas with Windows 7 you could slot a DVD into your computer and open it in Windows Media Player, that is no longer the case with Windows 8 and Windows 8 Pro. There is a very simple reason for this: The codecs required to play DVDs and Blu-rays â primarily MPEG-2/4 for video and Dolby Digital for audio â cost money.