Abstract: A method and system for detecting computer network data leaks over optical channels, for example using a mobile phone or other handheld device to rapidly scan a room with many light sources to identify the hidden transmission of data via optical steganography. The method of identification leverages spectral divergence created by the entropy produced by steganographically embedding data in the optical channel. The method and system proceed through multiple steps that can be computed in near real-time to eliminate background spectrum effects and isolate likely sources of information. The user or automated detection system captures a short video, and the video frames are then subdivided into smaller blocks effectively producing many adjacent videos of smaller pixel area.

Abstract: A cooling tower system includes a gas-liquid contactor having a housing coupled to a plurality of structural members. The system includes one or more basins positioned within the housing, and the one or more basins include a bottom basin. The system includes one or more packing sections positioned at least partially above the bottom basin, a fan operable to circulate a gas through the one or more packing sections, and a liquid distribution system configured to flow a solution onto the one or more packing sections, wherein the gas-liquid contactor comprises one or more materials of construction (MOCs). The plurality of structural members define a plenum comprising a containment that is at least partially segregated from the bottom basin by one or more walls, the bottom basin positioned at least partially below the packing.

Abstract: An aircraft nacelle has a first and second heat exchanger section to cool aircraft during different modes. Additionally, a fan and other components are configured to maximize efficiency and cooling capacity during a plurality of operating conditions.