Air is trapped in a container at an origin location associated with an event, and the container is sealed to hermetically confine the trapped air therein. In one exemplary embodiment, a system employs a centralized base unit that wirelessly communicates with remote switching units, which control various loads, such as lights andor other electrical components, based on commands from the base unit. In one version, a solid, single core having an outer surface and center is provided, wherein the outer surface has a hardness substantially the same or lower than the hardness of the center to define a zero or negative hardness gradient. The SPECT subsystem may be replaced with a SPECTCT combined system to provide morphology that allows for treatment planning. The memory hub controller uses the response status signal to control the coupling of memory requests to the memory modules and thereby control the number of outstanding memory requests in each of the memory modules. Split shift PSTD involves transmitting at least two phase swept versions of a signal over diversity antennas, wherein the two phase swept versions of the signal have a different phase.