A method and apparatus for forming a fibrous web includes a movable, foraminous forming surface and a substantially stationary, vacuum-commutator duct system which is located substantially subjacent the forming surface. For example, the invention provides compounds of Formula:Also provided in the present invention are methods of using such compounds or compositions, and methods of using these compositions to modulate activities of one or more of these kinases, especially for therapeutic applications such as treatment of cancer. Another lecture presentation system disclosed by the present invention includes a display screen for displaying an image.