Abstract: This disclosure relates to methods for low latency orthogonal frequency division multiple access communication, according to some embodiments. A wireless device may determine to communicate with another wireless device on a frequency channel as a pair of wireless devices. The wireless device may coordinate with a set of wireless device pairs to share medium access on the frequency channel. The wireless device communicate with the paired wireless device on the frequency channel in a frequency division multiplexing configuration with the set of wireless device pairs.

Abstract: A system for testing durability of a gas diffusion layer (GDL) is provided, including a clamping component, a liquid storage tank and a peristaltic pump. The clamping component is configured to fix the GDL. The liquid storage tank is configured to store a corrosive liquid. The peristaltic pump is arranged between the clamping component and the liquid storage tank. The peristaltic pump is connected to the clamping component via a first pipeline, and is connected to the liquid storage tank via a second pipeline. A GDL durability testing method is also provided. During the testing, the corrosive liquid is pumped into the clamping component to perform erosion-corrosion on the GDL.

Abstract: This disclosure relates to methods for low latency orthogonal frequency division multiple access communication, according to some embodiments. A wireless device may determine to communicate with another wireless device on a frequency channel as a pair of wireless devices. The wireless device may coordinate with a set of wireless device pairs to share medium access on the frequency channel. The wireless device communicate with the paired wireless device on the frequency channel in a frequency division multiplexing configuration with the set of wireless device pairs.

Abstract: A method for high grade magnetic separation using a matrix having one or more magnetizable matrix elements, wherein each element comprises a pair of poles aligned substantially parallel to a direction of flow of a slurry fluid containing particles to be separated, whereby a rear fluid vortex attributable to the upstream pole extends substantially to meet a front fluid vortex attributable to the downstream pole.