Abstract: A constraint-based configurator receives a configuration property expressed as a numeric value. A calculation is performed using the numeric value and a constraint is evaluated based on the result of the calculation. An output is automatically displayed based on the evaluated constraint.

Abstract: A method for automatically calibrating and deploying a tracking system of the type used by emergency responders (10) at the scene of a chaotic event such as a fire or the like. Each firefighter (10) is issued a wireless tag (26) having a unique identification number. Personal details about the firefighter (10) are prerecorded in a central database (44). Every piece of equipment (12, 14, 16) is also issued a wireless tag (26), with details about that piece of equipment prerecorded in the central database (44). At the scene of an emergency, drop readers (30, 30?) are scattered about the area. The drop readers (30, 30?) sense the location and ID number of each wireless tag (26). The drop readers (30, 30?) communicate with the central database (44) via a wireless connection (46). A scene commander (18) interfaces with the central database (44) through a graphic user interface (48) to acquire real time information about the location and movement of all personnel and equipment at the response scene.

Abstract: An apparatus for rollably supporting a cement-pouring chute having a support structure cooperatively engageable with a cement-pouring chute for supporting the chute and directing the pouring of cement therefrom. The support structure is angularly adjustable to allow for the angular adjustment of the cement-pouring chute. At least one roller assembly is connected to the support structure to provide a rollable adjustment to the support structure. The roller assembly may provide a pneumatic tire mounted on a caster and a bearing.