Abstract: An oral hygiene device comprises a housing having an outside mouth portion and an inside mouth portion, at least one energy delivery element disposed in or on the inside mouth portion, configured to deliver energy to one or more teeth of a subject, a controller disposed in the outside mouth portion electrically connected to the at least one energy delivery element, an energy storage unit disposed in the outside mouth portion, and a sleeve removably connected to the inside mouth portion of the housing, the sleeve having upper and lower channels configured to accept the upper and lower teeth of the subject. A method of using an oral hygiene device and a method of administering an oral hygiene treatment are also described.

Abstract: Technologies such as stealth buoys and underwater gliders need to modify their own buoyancy in order to operate. Strategies such as pumping fluid are typically used to change the device's net volume. This in turn requires a mechanically sophisticated apparatus, increasing the cost of the vehicle while diminishing its reliability. The concept of a buoyancy engine that exploits the enormous volume and pressure changes accompanying the reversible electrochemical interconversion of water to hydrogen and oxygen gases is applied to stealth buoys and underwater gliders.

Abstract: Technologies such as stealth buoys and underwater gliders need to modify their own buoyancy in order to operate. Strategies such as pumping fluid are typically used to change the device's net volume. This in turn requires a mechanically sophisticated apparatus, increasing the cost of the vehicle while diminishing its reliability. The concept of a buoyancy engine that exploits the enormous volume and pressure changes accompanying the reversible electrochemical interconversion of water to hydrogen and oxygen gases is applied to stealth buoys and underwater gliders.