Abstract: A method of identifying incidents using mobile devices can include receiving a communication from each of a plurality of mobile devices. Each communication can specify information about a detected sound. Spatial and temporal information can be identified from each communication as well as an indication of a sound signature matching the detected sound. The communications can be compared with a policy specifying spatial and temporal requirements relating to the sound signature indicated by the communications. A notification can be selectively sent according to the comparison.

Abstract: A wellbore assembly is provided that can include a first motor housing assembly member and a second motor housing assembly member that can bend relative to the first motor housing assembly at a bend location. The assembly can also include a magnet positioned to emit a magnetic field. A sensor can be magnetically coupled with the magnet and positioned to detect the strength of the magnetic field emitted by the magnet. Based on the strength of the magnetic field detected by the sensor, the amount of bend or bend direction of the second motor housing assembly member relative to the first motor housing assembly member can be determined.

Abstract: The present disclosure provides a firearm monitoring and notification apparatus to allow users to monitor a firearm without interfering with the accessibility to the firearm. The firearm monitoring and notification apparatus mitigates common risks surrounding unauthorized access and tampering through deterrence and notification strategies.

Abstract: An improvement in a tool of the type which is adapted for connection into a drilling string, which tool is adapted to perform a function in the drilling string as a first function. The improvement is a magnetic field source incorporated with the tool so that the tool is adapted to perform a magnetic field source carrying function as a second function. The first function is unrelated directly to the second function.

Abstract: A flash-bang projectile that generates one or more noise pulses and one or more flashes of light. In generating a noise pulse, the flash-bang projectile provides a housing that includes a gas chamber that entraps air. The gas chamber includes a compression device that, when the flash-bang projectile is shot or otherwise ejected by a gun or other form of ejection device, compresses the air that is entrapped in the gas chamber. A burst disk forms one wall of the gas chamber and is configured to rupture a selected time delay after the air has been compressed. Rupturing of the burst disk releases the compressed air entrapped in the gas chamber, allowing the air to be released through a horn nozzle, thereby generating a noise pulse. The flash-bang projectile may have more than one gas chambers, with associated compression devices, whose burst disks are configured to rupture with diverse time delays, in which case the flash-bang projectile can generate multiple noise pulses with corresponding delays.

Abstract: A method of detecting a firearm shot includes providing a firearm shot detection system in a location where firearm shots are prone to occur; detecting with the firearm shot detection system a bang of a gunpowder explosion from the firearm shot; detecting with the firearm shot detection system a flash of exploding gases exiting a barrel of a firearm that fired the firearm shot; detecting with the firearm shot detection system a crack of a bullet breaking the sound barrier from the firearm shot; and initiating an alarm with the firearm shot detection system based on the detection of the bang of the gunpowder explosion from the firearm shot, the flash of exploding gases exiting the barrel of the firearm that fired the firearm shot, and the crack of the bullet breaking the sound barrier from the firearm shot.

Abstract: High-power pressure wave source for generating pressure waves that can be repeated by igniting a combustible fluid mixture and by increasing its rate of combustion up to detonation. The high-performance pressure wave source has a channel, which expands toward one of its ends and forms a combustion chamber, a feed means for the components of the fluid mixture, and an igniting means in the area of the narrow end of the channel, a discharge means for the waste gas in the area of the wide end of the channel, and a membrane closing the wide end of the channel on the front side, as well as a plurality of vortex generators distributed over the length of the channel.

Abstract: A method and apparatus for communicating a desired target signal along a piping structure is provided. Because of a lossy communication path presented by the piping structure, an input signal, which is transmitted from a first location on the piping structure, is consciously predistorted prior to transmission. The amount and nature of the predistortion applied to the input signal is determined by mathematically modeling the communication path between the first location and a second location. Predistortion of the input signal results in reception of an output signal at the second location that closely approximates the desired target signal. Application of this predistortion method of communicating is described in the context of communicating in the borehole of a petroleum well.