Abstract: A valve includes a holder having an expandable material. The valve includes a retainer coupled to the holder. The valve further includes an umbrella member with a stem coupled to the holder. The expandable material is adapted to expand in size when absorbing a fluid and translate the umbrella member along an axis of the stem.

Abstract: A valve includes a holder having an expandable material. The valve includes a retainer coupled to the holder. The valve further includes an umbrella member with a stem coupled to the holder. The expandable material is adapted to expand in size when absorbing a fluid and translate the umbrella member along an axis of the stem.

Abstract: Provided herein are systems and methods for providing reliable control of an unmanned aerial vehicle (UAV). A system for providing reliable control of the UAV can include a computing device that can execute reliable and unreliable programs. The unreliable programs can be isolated from the reliable programs by virtue of executing one or more of the programs in a virtual machine client. The UAV can initiate a recovery action when one or more of the unreliable programs fail. The recovery action can be performed without input from one or more of the unreliable programs.

Abstract: A valve includes a holder having an expandable material. The valve includes a retainer coupled to the holder. The valve further includes an umbrella member with a stem coupled to the holder. The expandable material is adapted to expand in size when absorbing a fluid and translate the umbrella member along an axis of the stem.

Abstract: Provided herein are systems and method for autonomously or semi-autonomously landing an unmanned aerial vehicle (UAV) on a landing pad. The landing pad can include features configured to correct misalignment of the UAV on the landing pad. The landing pad can additionally include one or more markers than can be identified by the UAV to aid the UAV in locating the landing pad and determining the location of the UAV relative to the landing pad.

Abstract: Provided herein are systems and methods for providing reliable control of an unmanned aerial vehicle (UAV). A system for providing reliable control of the UAV can include a computing device that can execute reliable and unreliable programs. The unreliable programs can be isolated from the reliable programs by virtue of executing one or more of the programs in a virtual machine client. The UAV can initiate a recovery action when one or more of the unreliable programs fail. The recovery action can be performed without input from one or more of the unreliable programs.

Abstract: Provided herein are systems and methods for providing reliable control of an unmanned aerial vehicle (UAV). A system for providing reliable control of the UAV can include a computing device that can execute reliable and unreliable programs. The unreliable programs can be isolated from the reliable programs by virtue of executing one or more of the programs in a virtual machine client. The UAV can initiate a recovery action when one or more of the unreliable programs fail. The recovery action can be performed without input from one or more of the unreliable programs.

Abstract: Provided herein are systems and method for autonomously or semi-autonomously landing an unmanned aerial vehicle (UAV) on a landing pad. The landing pad can include features configured to correct misalignment of the UAV on the landing pad. The landing pad can additionally include one or more markers than can be identified by the UAV to aid the UAV in locating the landing pad and determining the location of the UAV relative to the landing pad.

Abstract: Provided herein are systems and methods for providing reliable control of an unmanned aerial vehicle (UAV). A system for providing reliable control of the UAV can include a computing device that can execute reliable and unreliable programs. The unreliable programs can be isolated from the reliable programs by virtue of executing one or more of the programs in a virtual machine client. The UAV can initiate a recovery action when one or more of the unreliable programs fail. The recovery action can be performed without input from one or more of the unreliable programs.

Abstract: A modular battery module that includes a plurality of substantially identical cartridges, a chassis, and a compression member, wherein each cartridge includes a heat sink with a thermal management channel; a prismatic cell coupled to the heat sink; and a first and a second manifold fluidly coupled to the thermal management channel, wherein the first and second manifolds form opposing edges of a frame, wherein the frame supports the edges of the heat sink. The plurality of cartridges is coupled together in the thickness direction to form a stack with a first and a second end. The chassis is formed from a first end plate, a second end plate, and the plurality of frames, wherein the first and second end plates cap the ends of the stack. The compression member couples the end plates and cartridges together, wherein the compression member applies a compressive force over a face of the batteries.