Abstract: An antimicrobial composition that includes: an antimicrobial component having at least one quaternary ammonium compound; a synthetic polymer that includes: at least one cationic monomer Ab, optionally, at least one anionic monomer Ba, and optionally, at least one non-ionic monomer Ca; an organic acid; and a surfactant selected from cationic surfactants, amphoteric surfactants and combinations thereof, wherein the composition is free of non-ionic surfactants. This composition when applied to a surface provides robust long lasting disinfection.

Abstract: Disclosed are hierarchical buoyant materials comprising porous components having multiple length scales that provide reduced density, higher strength, and improved buoyancy. The hierarchical buoyant materials include components having at least two length scales including a first porous material having elements characterized by a first linear length scale and a second porous material having elements characterized by a second linear length scale. The first porous material includes hollow microspheres, and the second porous material provides low effective density via geometrical arrangements. The second linear length scale is substantially different than the first linear length scale in terms of size, e.g., diameter, length, or distance.

Abstract: Among other things, a rowing technology includes a first rowing machine having an electromagnetic brake providing a resistance to a rower of the machine in each rowing stroke of a series of rowing strokes of the rower An electronic controller causes the resistance of the electromagnetic brake to vary over each rowing stroke in a profile that emulates resistance to which another rower in a shell on water or on a second rowing machine is subjected in each rowing stroke of a corresponding series of rowing strokes.

Abstract: In some examples, a method of making a filter includes heating a metal substrate to precipitate a first phase on a surface of the metal substrate from a metal alloy, the metal substrate defining a plurality of apertures configured to allow a gas to pass through the apertures. The metal substrate is the metal alloy including a first metal and a second metal. The method further includes growing a plurality of carbon nanotubes (CNTs) on the surface of the first metal of the first phase, and the CNTs are configured to capture at least one particle.

Abstract: An in-ear listening device having a device housing including a speaker housing and an elongated tube protruding away from the speaker housing, an audio port formed through the speaker housing, a speaker disposed in the speaker housing and aligned to emit sound through the audio port, a microphone port formed through the elongated tube, a microphone disposed in the elongated tube and operatively coupled to receive sound through the microphone port, a rechargeable battery and a wireless antenna disposed within the device housing, wireless circuitry coupled to the wireless antenna and configured to input and output radio frequency signals for wireless communications, a user-interface touch control disposed on the device housing and operable to control a function of the earbud, and battery charging circuitry coupled to the rechargeable battery and positioned within the device housing and operable to charge the rechargeable battery when coupled to receive power from an external power source.

Abstract: According to an aspect, an electrochemical cell may include a vessel, at least two instances of an anode assembly, at least two instances of an oxygen evolution electrode (OEE), and a gas diffusion electrode (GDE). In the vessel, the GDE may be disposed between mirrored arrangements of the at least two instances of the OEE and the at least two instances of the anode assembly.

Abstract: Techniques for performing audio-based device location determinations are described. A system may send, to a first device, a command to output audio requesting a location of the first device be determined. A second device may receive the audio and send, to the system, data representing the second device received the audio, where the received data includes spectral energy data representing a spectral energy of the audio as received by the second device. The system may, using the spectral energy data, determine attenuation data representing an attenuation experienced by the audio as it traveled from the first device to the second device. The system may generate, based on the attenuation data, spatial relationship data representing a spatial relationship between the first device and the second device, where the spatial relationship data is usable to determine a device for outputting a response to a subsequently received user input.

Abstract: A hydrophobic, self-healing coating includes a vitrimer film having a silicone polymer network crosslinked with dynamic covalent bonds including a boronic ester, where the vitrimer film has a thickness of less than 1000 nm, and where the dynamic covalent bonds provide a mechanism for self-healing of the vitrimer film.

Abstract: Systems and methods of the various embodiments may provide bifacial sealed gas diffusion electrode (GDE) assemblies. In some embodiments, a bifacial sealed gas diffusion electrode (GDE) assembly includes active electrode layers on two opposing sides of the assembly. Various embodiments may provide architecture and/or sealing methods for GDE assemblies. In various embodiments, the GDE assemblies may be for use in devices. In various embodiments, the devices may be primary or secondary batteries. In various embodiments, these devices may be useful for energy storage. For example, bifacial sealed GDE assemblies of the various embodiments may form cathode electrodes (sometimes called air electrodes) of a battery, such as a metal-air battery.

Abstract: An automated video game testing framework and method includes communicatively coupling an application programming interface (API) to an agent in a video game, where the video game includes a plurality of in-game objects that are native to the video game. The agent is managed as an in-game object of the video game. A test script is executed to control the agent, via the API, to induce gameplay and interrogate one or more target objects selected from the plurality of in-game objects native to the video game. Video game data indicating a behavior of the one or more target objects during the gameplay is received. Based on the received video game data, performance of the video game is evaluated.

Abstract: An oral insert includes a plurality of manifolds and a plurality of fluid nozzles. A manifold switch is coupled to the plurality of manifolds. The manifold switch is configured to select which of the plurality manifolds is to receive fluid from a fluid source.

Abstract: A modular transportable exercise apparatus includes a first support member having a first hollow tubular plastic frame at least partially embedded with a support material and a second support member having a second hollow tubular plastic frame at least partially embedded with the support material. A connector including a pivoting joint may be arranged to connect a first end of the first support member to a first end of the second support member, including a first portion engaged with the first end of the first support member and a second portion engaged with the first end of the second support member, the first portion being detachably connectable to the second portion.