Abstract: Systems and methods are described for determining device positions in a video surveillance system. A method described herein includes generating a reference sound; emitting, at a first device, the reference sound; detecting, at the first device, a responsive reference sound from one or more second devices in response to the emitted reference sound; identifying a position of each of the one or more second devices; obtaining information relating to latency of the one or more second devices; computing a round trip time associated with each of the one or more second devices based on at least a timing of detecting the one or more responsive reference sounds and the latency of each of the one or more second devices; and estimating the position of the first device according to the round trip time and the position associated with each of the one or more second devices.

Abstract: Systems and methods are described for determining device positions in a video surveillance system. A method described herein includes generating a reference sound; emitting, at a first device, the reference sound; detecting, at the first device, a responsive reference sound from one or more second devices in response to the emitted reference sound; identifying a position of each of the one or more second devices; obtaining information relating to latency of the one or more second devices; computing a round trip time associated with each of the one or more second devices based on at least a timing of detecting the one or more responsive reference sounds and the latency of each of the one or more second devices; and estimating the position of the first device according to the round trip time and the position associated with each of the one or more second devices.

Abstract: A non-thermal plasma or corona discharge is generated at multiple points and distributed to decontaminate surfaces and objects contaminated with chemical or biological agents. The corona discharge can be generated using very short high voltage pulses. The pulsed corona discharge can be directed at a contaminated surface through the unbraided strands at an end of a dielectric covered conductor. Another pulsed discharge embodiment incorporates a primary coil surrounding a chamber having a void filled with a plurality of secondary coils. A silent corona discharge can be generated using a variety of different configurations of a dielectric coated electrode and a bare electrode. The silent discharge is produced at all intersections between the dielectric covered electrode and the bare electrode. In one embodiment the apparatus comprises a blanket-like structure that is useful for decontaminating surfaces or decontaminating a fluid passing between spaced-apart bare electrodes.

Abstract: An inflatable structure for protecting an elevator interior includes an inflatable wall configured to be positioned adjacent the walls of an elevator cab. The inflatable wall may be inflated in position within the elevator cab and deflated to a storage position. The inflatable wall protects the walls of the elevator cab and prevents equipment from contacting or damaging the walls of the cab during a moving process.

Abstract: Apparatus and a method for separating particulates from a fluid in which the particulates are entrained. An impact collection surface is coated with a material that improves the efficiency with which the particulates are separated from the fluid and collected. In one embodiment, the coating retains the particulates when dry, but readily releases the particulates when wetted with a liquid. In another embodiment, the coating is a material that has a relatively low coefficient of friction, so that the particulates that have impacted on the coating are readily washed from it with a liquid. The coating may be selected to retain specific biological particulates by including an antibody that selectively links with antigens on the biological particulates. The coated impact collection surface may be used to purify water by removing biological contaminants and other particulates from the water passing over the coated impact collection surface.