Abstract: It is possible to easily set the operation of a spectrum analyzer. The spectrum analyzer receives a signal to be measured. The spectrum analyzer includes a display device (28) having a display screen for displaying the signal to be measured with a vertical axis representing a measurement value (power) of the signal to be measured and a horizontal axis representing frequency. Furthermore, a touch panel is provided on the display screen of the display device (28). When a user of the spectrum analyzer touches a point 32a (f0, P0) on the display screen, peak search is performed to detect a maximal value of the measurement value of the signal to be measured in a range of the vicinity of the touched point (frequency f1 to f2, power P1 to P2) (wherein f1=f0??f, f2=f0+?f, P1=P0??P, P2=P0+?P). Thus, it is possible to easily set the range for performing the peak search.

Abstract: An elastomer is molded by a reaction injection molding of polyurethane resins, polyurea resins, polyurethane/urea resins and polyurea/amide resins in the presence of an internal release agent which is a polyester condensate of a saturated or unsaturated fatty acid having a hydroxy group produced by transesterification or a molecular end-aminated or iminated polyester condensate. The elastomer has a good releasing property and a good coating property.

Abstract: An elastomer is molded by a reaction injection molding of polyurethane resins, polyurea resins, polyurethane/urea resins and polyurea/amide resins in the presence of an internal release agent which is a polyester condensate of a saturated or unsaturated fatty acid having a hydroxy group produced by transesterification or a molecular endaminated or iminated polyester condensate. The elastomer has a good releasing property and a good coating property.

Abstract: There is disclosed a resin composition comprising a product produced by the reaction of (a) a prepolymer prepared by reacting a diisocyanate with a hydroxy fatty acid ester or a mixture of a hydroxy fatty acid ester and a polyether polyol, with (b) at least one member selected from the group consisting of aromatic polyamines, polyether polyamines and polyether polyimines or a mixture of such a member as above and a polyether polyol. The resin composition is useful as an internal release agent for resins for reaction injection molding.

Abstract: A structure having a movable dome-type roof including a plurality of independently movable shell sections which nest one beneath the other. A frame superstructure is arched over the dome to support the upper ends of the shell sections. The lower edges of the shell sections are mounted on self-powered carriages and are independently shiftable about a circular base of the structure. By selectively shifting individual shell sections, the dome may be contracted or expanded as desired. The superstructure may be mounted on a circular track or on a pair of linear tracks to expedite the opening and closing of the dome.