Abstract: Systems and techniques are provided for a tree structure for byzantine fault tolerance. A validator computing device may receive a candidate block from a block producer. The block producer may be a second validator computing device of the distributed network. The validator computing device may determine whether or not the candidate block is valid. The validator computing device may sign an indication of whether or not the candidate block is valid to generate a signature. The validator computing device may send the signature to a third validator computing device that is a sibling node to the validator computing device. The validator computing device may receive a second signature from the third validator computing device. The validator computing device may combine the signature and the second signature to generate a combine signature if the signature and the second signature agree.

Abstract: A one-way fill valve for use in electronic enclosures is disclosed. The one-way fill valve allows an inert gas to be added to an electronic enclosure without contamination and without excessive leakage. Generally the one-way fill valve includes a membrane layer and a valve layer that restricts flow of gas in one direction but provides significantly less restriction in another direction.

Abstract: A filtration arrangement for electronic enclosures such as hard disk drives. A wall is formed around the circumference of at least a portion of a rotating disk. A channel is formed between a surface of the wall and the housing of the electronic enclosure, and a filter is located within the channel. When the disk rotates, currents are generated within a gas contained in the electronic enclosure. The gas enters the channel, minimizing contact between the contaminants entrained within the ga5 and the disk. The gas must pass through the filter before exiting the channel, minimizing the amount of gas that bypasses the filter.