Abstract: Embodiments are disclosed for crash detection on one or more mobile devices (e.g., smartwatch and/or smartphone). In some embodiments, a method comprises: detecting, with at least one processor, a crash event on a crash device; extracting, with the at least one processor, multimodal features from sensor data generated by multiple sensing modalities of the crash device; computing, with the at least one processor, a plurality of crash decisions based on a plurality of machine learning models applied to the multimodal features; and determining, with the at least one processor, that a severe vehicle crash has occurred involving the crash device based on the plurality of crash decisions and a severity model.

Abstract: A system and method for managing a network of nodes that share sensor data is presented. In one embodiment, the system and method clusters groups of nodes into subnets. Nodes in a common subnet share sensor data with other nodes in the subnet at one rate, while nodes that are not in a common subnet share sensor data at a second substantially reduced rate.

Abstract: A system and method for managing a network of nodes that share sensor data is presented. In one embodiment, the system and method clusters groups of nodes into subnets. Nodes in a common subnet share sensor data with other nodes in the subnet at one rate, while nodes that are not in a common subnet share sensor data at a second substantially reduced rate.

Abstract: A system and method for managing a network of nodes that share sensor data is presented. In one embodiment, the system and method clusters groups of nodes into subnets. Nodes in a common subnet share sensor data with other nodes in the subnet at one rate, while nodes that are not in a common subnet share sensor data at a second substantially reduced rate.

Abstract: A system and method for managing a network of nodes that share sensor data is presented. In one embodiment, the system and method clusters groups of nodes into subnets. Nodes in a common subnet share sensor data with other nodes in the subnet at one rate, while nodes that are not in a common subnet share sensor data at a second substantially reduced rate.

Abstract: A chimney reinforcing device for increasing the resistance of a brick chimney to destruction during an earthquake. The chimney to be reinforced is of the type which extends above the roof line and which is built between two vertical studs within a wall. The chimney is reinforced by two shorter lengths of angle iron extending from near the top of the chimney to near the roof line and two longer lengths of angle iron which extend on the exterior corners of the chimney below the roof line. These four angle irons are tied together by one or more cables. The two longer lengths of angle iron are secured to the vertical studs providing a chimney top which is supported by the lower portion of the chimney and which is less likely to be destroyed in an earthquake.