Abstract: A patient interface including a plenum chamber, a first seal-forming structure for forming a seal around the patient's mouth, and a second seal-forming structure for forming a seal around the patient's nares. The patient interface further includes at least one stopper rib disposed in the cavity of the plenum chamber spaced apart from the first seal-forming structure in a rest position. The first seal-forming structure configured to contact the at least one stopper rib in an operational position. The at least one stopper rib configured to oppose compression of the first seal-forming structure in an anterior direction. The second seal-forming structure is not configured to contact the at least one stopper rib.

Abstract: Described herein is a computer implemented method for automatically grouping design elements on a page. The method includes: determining an initial set of design element groups; performing one or more design element grouping iterations, each including: calculating a set of pairwise relationship scores and determining, based on the set of pairwise relationship scores, whether any pairs of design element groups should be combined. In response to determining that a particular pair of design element groups should be combined the method further includes combining the particular pair of design element groups into a single design element group.

Abstract: A semi-automated maintenance management system instructs a technician to disassemble a component into parts, compare each part to a reference entry and identify any discrepancies between the part and the reference entry, repair or replace the component according to instructions automatically provided for the discrepancy when a known discrepancy is found, create a disposition when an unknown discrepancy is found, and reassemble the component.