The notch in the sample affects the results of the impact test, thus it is necessary for the notch to be of regular dimensions and geometry. The size of the sample can also affect results, since the dimensions determine whether or not the material is in plane strain. This difference can greatly affect conclusions made.
At any point if you would like to enable touch screen functionality again, simply go back to the Device Manager, right-click HID compliant touch screen, and select Enable. Remember, you will be required to restart your PC to enable the touch screen functionality again.
BF. I've done several searches and can't seem to find a way to turn off my touch pad on my Lenovo Laptop. I recently updated my laptop with Windows 8, so I'm not sure if this has anything to do with it.) Press the Fn (Function Key) and F8 keys simultaneously to toggle between enabling and disabling the touchpad. Make the touchpad insensitive when tapped. b) Press Windows Key + Q on the Keyboard. c) Type Control Panel and click on Enter.