Abstract: Fluid sensing devices including a layer of fluid absorption and distribution material are provided. The layer includes a porous fibrous nonwoven matrix for absorbing fluid from the object to the first major surface of the layer and laterally distributing the absorbed fluid throughout the layer and to a second major surface of the layer opposite the first major surface. Hydration sensors are disposed on the second major surface of the layer to measure a hydration level.

Abstract: A solid state light having a solid state light source such as LEDs, a light guide having an enclosed interior volume such as a bulb shape without vents, and a thermal guide. The light guide is coupled to the light source for receiving and distributing light from the light source. The thermal guide is at least partially contained within the interior volume with an air gap between a portion of the thermal guide and the light guide. The thermal guide provides for thermal conduction from the light source and dissipating heat through convection and radiation for cooling the light.

Abstract: A solid state light having a solid state light source such as LEDs, a light guide having an enclosed interior volume such as a bulb shape without vents, and a thermal guide. The light guide is coupled to the light source for receiving and distributing light from the light source. The thermal guide is at least partially contained within the interior volume with an air gap between a portion of the thermal guide and the light guide. The thermal guide provides for thermal conduction from the light source and dissipating heat through convection and radiation for cooling the light.

Abstract: A solid state light having a shell forming an interior volume and with surface texture for redirecting light. A light section is coupled to the shell, and a light source board in the light section includes at least one solid state light source such as an LED. The shell, light section, and light source board have apertures for providing an air cooling channel through the light. The solid state light source transmits light into the interior volume, and the light exits from the shell and is redirected by the surface texture, providing for various light distribution curves of the light.

Abstract: A solid state light having a shell forming an interior volume and with surface texture for redirecting light. A light section is coupled to the shell, and a light source board in the light section includes at least one solid state light source such as an LED. The shell, light section, and light source board have apertures for providing an air cooling channel through the light. The solid state light source transmits light into the interior volume, and the light exits from the shell and is redirected by the surface texture, providing for various light distribution curves of the light.

Abstract: A light with integrated light and thermal guides, and having solid state light sources such as LEDs. The light guide includes a material having a first surface and a second surface opposite the first surface and forming an interior volume. The light guide is coupled to the LEDs for receiving and distributing light from them through the first surface, and the light is transported through the light guide until the light is extracted from the first or second surface. The light guide can include alignment features such as fiducials that mate with a base. The thermal guide is contained within the interior volume and integrated with the light guide for providing thermal conduction from the LEDs for cooling the light. The thermal guide can be vented to provide for internal cross flow of air for the cooling.

Abstract: A light with integrated light and thermal guides, and having solid state light sources such as LEDs. The light guide includes a material having a first surface and a second surface opposite the first surface and forming an interior volume. The light guide is coupled to the LEDs for receiving and distributing light from them through the first surface, and the light is transported through the light guide until the light is extracted from the first or second surface. The light guide can include alignment features such as fiducials that mate with a base. The thermal guide is contained within the interior volume and integrated with the light guide for providing thermal conduction from the LEDs for cooling the light. The thermal guide can be vented to provide for internal cross flow of air for the cooling.

Abstract: A fuel cell assembly includes first and second compression members. Two or more membrane electrode assembly (MEA) stacks are disposed between the compression members, each MEA stack having a positive and negative end. A first current collector is electrically coupled to a positive end of a first stack of the MEA stacks. A second current collector is electrically coupled to a negative end of a second stack of the MEA stacks. A current shunt is disposed between the compression members and electrically couples the MEA stacks.

Abstract: A head support system, comprising a seat cover having a front portion and a rear portion that terminate at a bottom end. The front portion comprises first and second loop padding. Headwear comprises first and second earpieces. The first and second earpieces have third and fourth loop padding thereon. Double-sided hook padding attaches onto the first and second loop padding, and the third and fourth loop padding respectively. Restraining means are used to restrain an infant or toddler's head in an upright position with comfort to the infant or toddler.

Abstract: An optical unit that includes a polarizing beamsplitter (PBS). The PBS includes a reflective polarizer that transmits a portion of a light beam that has a first polarization and reflects a portion of the light beam that has a second polarization. A light absorbing device is operatively disposed relative to the PBS. The light absorbing device receives the light either transmitted or reflected by the PBS. The light absorbing device includes a light capture portion having a structured surface.

Abstract: A fuel cell assembly includes first and second compression members at first and second ends of the fuel cell assembly. A membrane electrode assembly (MEA) stack is disposed between the compression members. The MEA stack includes a fluid flow passage that allows gases to flow between the first and second ends of the fuel cell assembly. A fastening member connecting the first and second compression members and is disposed within the fluid flow passage of the MEA stack.

Abstract: A proton exchange membrane fuel cell stack includes two or more plate assemblies stacked together. Each plate assembly includes a membrane electrode assembly (MEA) disposed between a first plate and second plate. One of the first and second plates is an anode plate and the other is a cathode plate. The first and second plates each include a first side facing the MEA and a second side facing away from the MEA. The plates include flow fields on the first sides and gas manifold holes coupled to gas distribution passages of the fuel cell stack. The first plates each further include a flow path carrying gases from at least one of the gas manifold holes to the flow field of the first plate. The flow path is formed at least in part by channels on the second side of an adjacent second plate when the plate assemblies are stacked together.

Abstract: A fuel cell assembly includes first and second compression members. Two or more membrane electrode assembly (MEA) stacks are disposed between the compression members, each MEA stack having a positive and negative end. A first current collector is electrically coupled to a positive end of a first stack of the MEA stacks. A second current collector is electrically coupled to a negative end of a second stack of the MEA stacks. A current shunt is disposed between the compression members and electrically couples the MEA stacks.

Abstract: A fuel cell assembly includes a membrane electrode assembly (MEA) stack has a plurality of stacked planar membranes. The MEA stack further includes gas passageways arranged so that anode and cathode gases flow perpendicular to the planar membranes between a first side and a second side of the fuel cell assembly. Anode gas inlet and outlet ports and cathode gas inlet and outlet ports are disposed on the first side of the fuel cell assembly and coupled to the gas passageways of the MEA stack.