Abstract: A process for producing a fluorinated polymer coating on a fabric substrate, including providing a first plasma source containing at least one pair of hollow-cathode plasma generating electrodes, injecting a first plasma generating gas in the at least one pair of hollow-cathode plasma generating electrodes, applying a first electrical power to the first plasma source, injecting a fluorinated monomer with an inert carrier gas between the at least one pair of hollow-cathode plasma generating electrodes, and depositing the fluorinated polymer coating on a surface of the fabric substrate by exposing the fabric substrate to the plasma of the first plasma source. The fluorinated polymer coating is water repellent.

Abstract: Embodiments of the invention include a unidirectional exhalation valve for a respiratory device such as a facemask. The valve opens to vent air out of the interior of the facemask and closes to prevent the inflow of ambient air. The valve is comprised of a valve body, a valve cover and a membrane. The membrane is secured to the valve body around its perimeter by the valve cover. The membrane is comprised of two or more flaps that flex toward a central region, in a direction away from the valve body, to open the unidirectional valve.

Abstract: A system for design, modeling, simulation, and analysis of transportation systems is described herein. The system may obtain a set of configuration data for a set of transportation systems. The system may generate a set of models for the set of transportation systems based on the set of configuration data. The system may simulate operations of the proposed transportation system and the one or more other transportation systems based the set of models. The system may also obtain a set of performance metrics for the set of transportation systems based on the simulation.

Abstract: Generating a layout for a transportation system. A method is provided. The method includes determining a set of destinations for a transportation system that uses a first transportation technology. The method also includes determining a set of routes. The method further includes generating a graph based on the destinations and routes. The graph comprises a set of nodes that represent the destinations. The graph further comprises a set of edges that represent a first subset of the set of routes. The set of edges are associated with a set of costs. Each cost of the set of costs represents a respective travel time when the first transportation technology is used. The method further includes updating the graph based on a second set of costs. Each cost of the set second of costs represents a respective travel time when a second transportation technology is used. The method further includes generating a layout for the transportation system based on the graph.

Abstract: Discloses a respiratory device comprising a mask positioned around the mouth and nose of a wearer to form a relative closed area sealed from the ambient air, at least one unidirectional valve for mounting of an active venting system, installed onto the mask for exhausting warm, moist exhaled air from the interior space of the respirators and at least one active venting system attached onto the valve and operated during the exhalation cycle. The top housing of the unidirectional valve has an attachment member for attaching the active venting system onto it. The active venting system can be attachable or detachable onto the valve. The valve attached with active venting system together effectively and quickly exchanges the air from the interior of the mask during exhalation cycle. When the AVS is not attached onto the valve, a simple valve cap can be attached on instead, for aesthetic purposes.

Abstract: Discloses a respiratory device comprising a mask positioned around the mouth and nose of a wearer to form a relative closed area sealed from the ambient air, at least one unidirectional valve for mounting of an active venting system, installed onto the mask for exhausting warm, moist exhaled air from the interior space of the respirators and at least one active venting system attached onto the valve and operated during the exhalation cycle. The top housing of the unidirectional valve has an attachment member for attaching the active venting system onto it. The active venting system can be attachable or detachable onto the valve. The valve attached with active venting system together effectively and quickly exchanges the air from the interior of the mask during exhalation cycle. When the AVS is not attached onto the valve, a simple valve cap can be attached on instead, for aesthetic purposes.