Abstract: In example embodiments, techniques are provided for classifying elements of infrastructure models using a convolutional graph neural network (GNN). Graph-structured data structures are generated from infrastructure models, in which nodes represent elements and edges represent contextual relationships among elements (e.g., based on proximity, functionality, parent-child relationships, etc.). During training, the GNN learns embeddings from the nodes and edges of the graph-structured data structures, the embeddings capturing contextual clues that distinguish between elements that may share similar geometry (e.g., cross section, volume, surface area, etc.), yet serve different purposes.

Abstract: In example embodiments, techniques are provided for labeling elements of an infrastructure model with classes. The techniques may be implemented by a labeling tool that uses an ML model to create element selections and provides a cycle review mode to speed review within such selections. The labeling tool may further provide for two file loading and a number of visualization schemes to speed comparison of label files and prediction files.

Abstract: A helmet has a helmet shell, and a breathing mask assembly connected to the helmet shell. The breathing mask assembly has: a breathing mask; a flexible connector connecting the breathing mask to the helmet shell; and an actuator mounted to the breathing mask and operatively connected to the flexible connector. The actuator and the flexible connector are configured such that moving the actuator from a first position to a second position shortens a length of the flexible connector extending between the actuator and the helmet shell thereby moving the breathing mask closer to a rear of the helmet shell, the actuator moving with the breathing mask closer to the rear of the helmet shell.

Abstract: A clamp for clamping an object having an aperture therethrough to a member is disclosed. The clamp passes through the aperture when clamping the object to the member. The clamp has a head portion defining a channel adapted for receiving an edge of the aperture; a body portion extending from the head portion; and a tail portion extending from the body portion. The tail portion has a member contacting surface shaped for wrapping around at least a portion of a perimeter of the member. A vehicle having a windshield clamped to a frame member using at least one such clamp is also disclosed.

Abstract: A clamp for clamping an object having an aperture therethrough to a member is disclosed. The clamp passes through the aperture when clamping the object to the member. The clamp has a head portion defining a channel adapted for receiving an edge of the aperture; a body portion extending from the head portion; and a tail portion extending from the body portion. The tail portion has a member contacting surface shaped for wrapping around at least a portion of a perimeter of the member. A vehicle having a windshield clamped to a frame member using at least one such clamp is also disclosed.