Abstract: A costume suit modeled after a large size animal having a head and mouth section, a neck section, a torso section, a foot section, a tail section, a skeletal part as a whole, and an outer skin part covering the whole is provided. The torso section is communicated with the foot section forming an internal hollow, just enough for an adult to fit at standing position. The hollow includes a frame pack fixed and installed to the skeletal part of the costume suit, in a position of an approximate equilibrium point of the costume suit. In the hollow, a means for manipulating a movement of the head and mouth section and the neck section, and a means for manipulating opening and closing of a mouth of the head and mouth section are equipped. Moreover, the skeletal part of the tail section is composed of a flexible tabular member placed in an internal hollow of the tail section, imitating a skeleton of a tail, and a plurality of foam blocks fixed and placed on the tabular member at certain intervals.

Abstract: In a live-action theater, a catapult launches a prop which achieves free flight in the theater. The catapult and prop are concealed until the moment of launch, whereupon the prop suddenly hurtles into an audience's view, and lands in front of the audience. The audience views the launch from a seating area or from a vehicle moved through the theater. The prop is for example, a seaplane or a jetski. The prop is then retrieved from the landing area using a crane or other lifter and returned to the catapult for a subsequent launch. By launching a prop in a theater with a catapult, the audience sees true free flight, rather than an illusion of flight. The audience sees no supports or other devices which can diminish the effect. A catapult allows a prop to be launched directly at the audience at a realistic or full speed, creating a more dramatic effect than if a prop is moved about some distant stage area using cables or a boom.

Abstract: A film to live-action theater includes a screen facing an audience seating area. The screen has exit and entrance openings and movable panels to open and close off the openings. A screen elevator lifts the screen from a lowered position, wherein the entrance and exit openings are concealed behind a stage, to an up position, to allow an actor and/or a prop to move through the openings. The audience views a film presentation projected onto the lowered screen. At a predetermined time, the screen is quickly raised and a live actor and/or a prop move through the screen to a front stage area, on a track. The opening of the door panels is preferably partially concealed through special effects such as fog or lighting. As the film presentation is preferably made with three dimensional film technology, the audience perceives a film-to-live transition.

Abstract: A very sensitive and reliable analytical method is proposed for the concentration determination of silane SiH.sub.4 in a gaseous mixture. In the method, the sample gas is admixed with ozone and irradiated with ultraviolet of a wave length of 200 to 320 nm so that a silicic aerosol is formed in the sample gas and the concentration of the silicic aerosol suspended in the sample gas is determined by the measurement of light scattering. Instead of the admixture of ozone, the sample gas containing or admixed with oxygen is first irradiated with ultraviolet of shorter than 200 nm wave length to convert the oxygen into ozone in situ and then the photochemical formation of silicic aerosol and light scattering measurement are undertaken as mentioned above.