Abstract: Aspects of duct systems for use with fuel cells and methods of using the same are disclosed. According to an aspect of the disclosure, a duct system (10) for cooling fuel cells (12) via a coolant fluid includes a housing (100); a cooling chamber (112); an inlet port (120) configured to receive the coolant into the system; an exhaust port (130) configured to expel the coolant from the system; and a means for moving the coolant into, through, and out of the system.

Abstract: A fan assembly, comprising an airflow generator arranged to generate an airflow and a nozzle comprising a nozzle body and first and second air outlets defined in a front side of the nozzle body, the first and second air outlets arranged to emit the airflow from the fan assembly in a substantially forward direction of the nozzle body. The fan assembly comprises a valve mechanism to selectively permit the airflow to pass through the first air outlet or the second air outlet, wherein the first and second air outlets have different geometries such that the first air outlet emits a first airflow delivered to a user as a focused airflow, and the second air outlet emits a second airflow delivered to a user as a diffused airflow.

Abstract: An apparatus for filtering raw sea water and methods for using the same are provided. The apparatus includes a longitudinal beam member having a first end and a second end. A first header is located about the first end of the beam member and a second header is located about the second end of the beam member. A removable mesh screen can be disposed around the beam member and between the first and second headers, defining an inner cavity between an inner surface of the removable mesh screen and outer surface of the beam member. A handle can be disposed on the first header. The removable mesh screen includes at least one latching member that is configured to secure the mesh screen around the beam member when latched and to release the removable mesh screen from around the beam member when unlatched.

Abstract: Provided are electrochemical cells including separators permeable to some materials and impermeable to other materials in electrolytes. Also provide are methods of forming such separators. The selective permeability of a separator is achieved by its specific pore diameter and a narrow distribution of this diameter. Specifically, a species responsible for ion transport in an electrochemical cell are allowed to pass through the separator, while another species is blocked thereby preventing degradation of the cell. For example, a species containing lithium ions is allowed to pass in rechargeable cells, while one or more species containing transition metals are blocked. In some embodiments, a separator may include a membrane layer with at least 90% of pores of this having a diameter of between about 0.1 nanometers and 1.0 nanometer. The membrane layer may be a standalone layer or supported by a membrane support.

Abstract: A method of operating a fuel cell system (100) comprising a fuel cell stack (110) and a closed loop water cooling circuit for direct injection of cooling water into the stack (110), the method comprising: measuring an operational parameter of the fuel cell system (100) over a time period; adding an amount of water to the closed loop cooling circuit from the total amount of water generated during operation of the fuel cell stack (110) over the time period; and removing the amount of water from the closed loop cooling circuit generated during operation of the fuel cell stack (110) over the time period is automatically determined by the fuel cell system (100) as a function of the operational parameter.

Abstract: A mask assembly or interface with a mask assembly includes a mask seal and a mask shell that supports the mask seal. In some configurations, the mask assembly is configured to be fully positioned lower than a bridge of a nose of a face of a user and to provide an exposed bridge of the nose of the user. The mask seal includes one or more features that decouple movement of the nasal portion and the oral portion to allow relative movement therebetween at least about a longitudinal axis extending in the front to back direction of the mask seal. In some configurations, an interface assembly includes a movement limiting arrangement that limits movement of the upper portion of the mask seal.

Abstract: An interface for positive pressure respiratory therapy includes a mask assembly having a mask seal and a mask shell. The mask assembly is positioned lower than and exposes a bridge of the user's nose. The mask seal includes first and second portions on respective first and second sides of a nasal region that contact opposing sides of the user's nose. The first and second portions each include supports that help maintain a shape of the mask seal. A pair of covers can be supported relative to the mask assembly and adjacent a respective one of the first and second portions of the mask seal. The covers limit expansion of the first and second portions of the mask seal in response to pressurized air within the mask seal. The supports of the first and second portions can transfer load from the mask seal to the covers.

Abstract: An interface for positive pressure therapy includes a mask assembly, a headgear assembly and a connection port assembly. The mask assembly comprises a seal member that has an upper portion movably connected to an integrated lower portion, wherein the upper portion rolls during hinging movement of the upper portion relative to the lower portion. The headgear assembly allows connection to the mask assembly in a direction substantially normal to a direction of strap tension. The connection port assembly includes a swivel elbow with a valve member that controls flow through a port that opens toward the user.

Abstract: An interface for positive pressure respiratory therapy includes a mask assembly having a mask seal and a mask shell. The mask assembly is positioned lower than and exposes a bridge of the user's nose. The mask seal includes first and second portions on respective first and second sides of a nasal region that contact opposing sides of the user's nose. The first and second portions each include supports that help maintain a shape of the mask seal. A pair of covers can be supported relative to the mask assembly and adjacent a respective one of the first and second portions of the mask seal. The covers limit expansion of the first and second portions of the mask seal in response to pressurized air within the mask seal. The supports of the first and second portions can transfer load from the mask seal to the covers.

Abstract: An interface for positive pressure therapy includes a mask assembly and a headgear assembly. The mask assembly comprises a mask seal that is adapted to underlie the nose. The mask seal extends up the lateral sides of the nose. The mask seal has a primary seal below the nose and a secondary seal alongside the nose.

Abstract: A headgear assembly for a full-face under-nose respiratory mask can include a flexible headgear connector element. A free end of each of upper straps of the headgear is coupled to the headgear connector element, which is configured to extend laterally across and be removably fastened to a frame of the respiratory mask below a tip of a user's nose. A respiratory mask assembly can include a bias vent in communication with a cushion module and configured to allow air to be exhausted from the cushion module through the bias vent. The bias vent can be provided with a diffuser including a diffuser material configured to extend over the bias vent. The diffuser material provides a tortuous air path from the bias vent through the diffuser. The bias vent and/or the diffuser can be provided on various components of the assembly.

Abstract: Provided are imaging agents comprising a compound of Formula I, or a pharmaceutically acceptable salt thereof, and methods of their use.

Abstract: An interface assembly includes an interface, such as a mask, that is secured to a head using a headgear assembly. The headgear assembly can include at least one halo portion and a plurality of straps. The headgear assembly can include both a front halo portion and a rear halo portion. In some arrangements, the headgear and mask define an adjustable closed loop. In some arrangements, the headgear can include one or more rigid portions that contact the user's face to at least partially isolate a seal of the mask from tightening forces applied to the headgear. In some arrangements, the mask is an oral-nasal mask and the headgear applies a force to the mask comprising an upward force component. In some arrangements, the headgear can be contoured to the user's head.