Abstract: Disclosed are foamable compositions that can be particularly beneficial for foam-in-place packaging purposes. The foamable compositions can be reacted to form a polyurethane foam that can be utilized to secure packaging contents inside a transport packages, and that at a later time can be readily decomposed at low degradation temperatures, e.g., about 90° C. or less. The polyurethane foam can also act as a sink for hydrogen radicals and as such can be utilized for transport of high energy emitting materials, e.g., ?-radiating materials.

Abstract: This invention provides a system and method for forming a fibrous porous ceramic substrate that employs a screw extruder, and illustratively, a twin screw extruder to form a substrate by directing a homogeneous, wetted and mixed group of substrate components through a screw extruder die under pressure. The components of the mixture can be initially mixed in a substantially dry state by an appropriate mixer to form a homogeneous powder with a high dispersal of materials therein. The powder can be continuously mixed and conveyed to a feeder of the extruder. Along the path of the extruder, fluid can be introduced at a metered rate, along with other additives, such as colloidal silica (glass binder). The extruder's twin, co-rotating shafts include a combination of screw elements for feeding the mixture and shear-inducing mixing elements (kneading blocks) for thoroughly mixing fluid into the dry components.

Abstract: Methods and apparatus are disclosed which allow many satellites (A1-M, B1-N) in a plurality of Systems (A, B) to use the same radio frequencies (f1-n) so long as there is no interference between radio signals. The methods compute times (t) when satellite radio signals (32, 36) have overlapping reception areas or "footprints" (30, 35) on the Earth's surface (E) whereby a user's reception or transmission of a message would be interfered unless different frequencies (f1-n) are used for the "competing" signals. The methods use a timing algorithm that does not allow two satellites (Ai, Bi) which are "visible" at the same point on the Earth (E) to transmit on the same frequency (fi). In one preferred embodiment, a timing algorithm (48) produces a radio frequency use schedule (49) computed on the Earth from orbital data maintained in an ephemeris (46) of satellite communications systems (A, B) which communicate on frequencies (f1-n) giving rise to interfering radio signals.

Abstract: A deadbolt latch assembly includes a cylindrical latch housing containing a pair of ear tabs for engagement with either of a rectangular or circular faceplate assembly, depending upon the requirements of the door in which the latch assembly is to be mounted. The rectangular faceplate assembly includes a backing plate for rotary engagement with the ear tube, while the circular faceplate assembly includes a pair of elongated slots for slidably engaging the ear tabs and a groove for accepting a retainer ring which holds the ear tabs in place.