Abstract: Device, systems, and methods relating to a mask interface are disclosed. For example, a mask interface may include a body and an interface coupled to the body. The body may include a nasal portion including an opening and a mouth portion including an open channel. The interface may be in contact with a subject’s face and may include a flexible material conformable to the subject’s face.

Abstract: A simulation system receives a request to retrieve simulation data from memory of a computing system. The received request includes a property key identifying the simulation data to be retrieved. The property key is searched in a map storing associations between a plurality of property keys and memory where simulation data associated with a corresponding property key is stored. The memory for the requested simulation data accessed to obtain the requested simulation data.

Abstract: A simulation system receives a request to retrieve simulation data from memory of a computing system. The received request includes a property key identifying the simulation data to be retrieved. The property key is searched in a map storing associations between a plurality of property keys and memory where simulation data associated with a corresponding property key is stored. The memory for the requested simulation data accessed to obtain the requested simulation data.

Abstract: A simulation system receives a request to perform a function for a model having a specified geometry. The function is received as an interface that is not geometry specific. The simulation system determines the type of geometry of the model. If the simulation system determines that the geometry of the model is structured, a simulation engine of the simulation system executes a structured geometry specific implementation of the function. The structured geometry specific implementation of the function procedurally determines simulation data associated with the model. If the simulation system determines that the geometry of the model is not structured, or if the simulation system determines that the geometry of the model is unstructured, the simulation engine of the simulation system executes an unstructured geometry specific implementation of the function. The unstructured geometry specific function access a memory of a computing device for obtaining the simulation data associated with the model.