Abstract: Methods, systems, and apparatus for automatically skimming swimming pools with a pool cover attachment. In one aspect, an apparatus includes a skimming element holder; a skimming element connected to the skimming element holder; a base member connected between the swimming pool cover and the skimming element, where pivot of the base member pivots the skimming element holder and the skimming element; and a skimming guide connected to the base member, where the swimming pool cover defines a swimming pool plane; the base member automatically actuates the skimming element through the swimming pool plane, and immediately before ending the traversal along the swimming pool plane, the base member again automatically actuates through the swimming pool plane opposite to the previous direction of automatic pivot of the base member.

Abstract: Methods, systems, and apparatus for automatically skimming swimming pools with a pool cover attachment. In one aspect, an apparatus includes a skimming element holder; a skimming element connected to the skimming element holder; a base member connected between the swimming pool cover and the skimming element, where pivot of the base member pivots the skimming element holder and the skimming element; and a skimming guide connected to the base member, where the swimming pool cover defines a swimming pool plane; the base member automatically actuates the skimming element through the swimming pool plane, and immediately before ending the traversal along the swimming pool plane, the base member again automatically actuates through the swimming pool plane opposite to the previous direction of automatic pivot of the base member.

Abstract: A tissue interface device (10) suitable for positioning on or about one or more artificial openings in a biological membrane of an organism and for coupling to a monitor and control unit and a vacuum source. The tissue interface device (10) comprises a housing (100), a sensor channel (130), and a sensor (150). The housing (100) defines an orifice (120), the orifice (120) having an open inlet port (122) on the bottom end (102) of the housing (100) and a distal end (124) that is in fluid communication with the sensor channel (130). The orifice (120) is in fluid communication with fluid that flows from the artificial opening formed in the biological membranes. The sensor channel (130) is for coupling to, and fluid communication therewith, the vacuum source. The sensor (150) is positioned in the sensor channel (130) in a flow path of the fluid for sensing a characteristic of the fluid as it flows out from the artificial opening. The sensor generates a sensor signal representative thereof.

Abstract: An alignment device and related systems and methods for aligning at least one apparatus with respect to a surface of a tissue. The alignment device comprises a tissue interface member suitable for positioning on the surface of the tissue and mating with the apparatus to maintain alignment of the apparatus during an operation of the apparatus. The alignment device is useful to align various apparatus that are part of a continuous analyte monitoring system.