In an embodiment, an information processing apparatus is connected to external apparatuses. Winding intervals of the respective turns in the winding portion decrease monotonically from one end to the other end of the winding portion. A glancing function is then performed, which provides animated movement of the virtual person’s head to reveal a three-dimensional tool space that is normally hidden from view. A first light emitting element 310 and a second light emitting element 320 are serially laminated over a substrate 300. The filter element is cleaned by pressurizing the feed solution or by creating a vacuum in the permeate collection tube, and periodically introducing a pressurized back flush fluid into the permeate collection tube of the filtration element to back-flush the membrane, under a pressure and for a time sufficient to dislodge a substantial portion of the retained solids on the surface of the membrane. By providing a path within a wall which is particularly shaped in portions it is possible to provide entrainment of a hot leakage gas flow away from entry into the cavity.