Abstract: The invention provides door and window sensors, which can be incorporated into building pressurisation and depressurisation systems, for use in protecting a building's escape routes against smoke ingress during a fire.

Abstract: The invention provides door and window sensors, which can be incorporated into building pressurisation and depressurisation systems, for use in protecting a building's escape routes against smoke ingress during a fire.

Abstract: The invention provides door and window sensors, which can be incorporated into building pressurization and depressurization systems, for use in protecting a building's escape routes against smoke ingress during a fire.

Abstract: Embodiments of the invention provide apparatuses, methods, and systems utilizing one or more commonly available sensors to actively monitor one or more particular environments based on data received from one or more physical sensors and virtual sensors (e.g., physical sensors “fused” to provide more useful information) regarding one or more attributes of the environments being monitored. This sensor data may then be utilized to describe the activity/non-activity of individual(s) present in the monitored environments. Aspects of the invention further determine behavioral patterns related to activity of the monitored environments and evaluates the received data to determine one or more deviations from one or more behavioral patterns, and then, based on the evaluating, selectively indicating an alert condition indicative of the determined one or more deviations.

Abstract: The invention provides door and window sensors, which can be incorporated into building pressurisation and depressurisation systems, for use in protecting a building's escape routes against smoke ingress during a fire.

Abstract: A detector for locating a sonde includes a plurality of antennas, an analogue to digital converter 11 and a digital signal processor to isolate the magnetic signal produced by the sonde. The digital signal processor includes a phase feedback loop 21 to allow the digital processing unit to follow variations in the frequency of oscillation of the magnetic signal produced by the sonde.

Abstract: A detector for locating a sonde is comprised of a plurality of antennas, a corresponding number of signal isolator modules 1 and a geometrical evaluation module. The magnetic signal generated by the sonde has a fundamental frequency and harmonic frequencies. A frequency spectrum analyser 29 which forms part of the signal isolator module 1 has frequency bins which are aligned with the fundamental frequency and a plurality of harmonic frequencies of the magnetic signal produced by the sonde. The frequency bins follow variations in the frequency of the magnetic signal produced by the sonde which allows the detector to detect the sonde at a separation of up to 30 m.

Abstract: A detector 1 for detecting a buried current carrying conductor comprises a digital homodyne receiver. The receiver processes field strength signals induced in a pair of vertically spaced antennae 3, 5. The analogue to digital converter is an audio-grade stereo CODEC 11.

Abstract: An apparatus is described for applying electrical pulses to a patients body by at least two electrodes at respective locations on the patients body, the apparatus comprising a pulse generating unit connectable to the electrodes, the pulse generating unit being arranged to provide a series of electrical pulses, wherein said series of pulses comprises a plurality of first and second polarity impulses having a temporal spacing between the first and second impulses, wherein each impulse has a width of between 2 to 30 ?S.

Abstract: A gamma detection and modeling system in which the energy deposition and incident locations on two detectors are used to calculate the source. The detector assembly and processing means are provided as distinct units allowing the detectors' use in radioactive and other inaccessible areas. The gamma radiation image can be superimposed on an optical image of the monitored location. Various detector arrays from a simple pair of detectors through single first and multiple second detectors to combinations of such detector pairs are disclosed together with a method for their use.

Abstract: A chair capable of rocking and reclining is provided with a contoured seat and an external frame assembly for maintaining the contoured seat above the ground. The external frame assembly has a pair of spaced-apart tubular side members with a continuous outer periphery forming a loop. Each of the tubular side members has a large, ground-contacting arcuate region that extends for approximately 90 degrees and an arm support region that forms an arm rest. The tubular side members are coupled together by cross members that extend between the two. The contoured seat fits between the side members and rests upon the cross members. A user is comfortably positioned in the chair by head, back and seat support areas of the contoured seat.