Abstract: A memory device includes a memory material portion, and an ovonic threshold switch selector element. The ovonic threshold switch selector element includes a first carbon-containing electrode comprising carbon and a metal, a second carbon-containing electrode comprising the carbon and the metal, and an ovonic threshold switch material portion located between the first electrode and the second electrode.

Abstract: A head wearable air purifier includes a headgear, an air purifier assembly supported by the headgear, a nozzle assembly and a mask body. The air purifier assembly includes a filter and an airflow generator for generating an airflow through the filter. The nozzle assembly is configured to extend in front of a face of a wearer in use. The nozzle assembly includes an inlet aperture configured to receive a filtered airflow from the air purifier assembly, and an air outlet for emitting the filtered airflow from the nozzle assembly. The mask body detachably connects to the nozzle assembly and defines a cavity for receiving a mouth and/or nose of the wearer. The cavity is in fluid communication with the air outlet.

Abstract: Energy conversion systems that may employ control grid electrodes, acceleration grid electrodes, inductive elements, multi-stage anodes, and emissive carbon coatings on the cathode and anode are described. These and other characteristics may allow for advantageous thermal energy to electrical energy conversion.

Abstract: A memory device includes a memory material portion, and an ovonic threshold switch selector element. The ovonic threshold switch selector element includes a first carbon-containing electrode comprising carbon and a metal, a second carbon-containing electrode comprising the carbon and the metal, and an ovonic threshold switch material portion located between the first electrode and the second electrode.

Abstract: There is provided a filter assembly arranged to be mounted over the air inlet of a fan assembly, the filter assembly comprising a filter frame arranged to support one or more filter media. The filter frame is provided with a first engagement member on a first edge of the filter frame and a second engagement member on a second edge of the filter frame, the first edge being opposite to the second edge. The first engagement member and the second engagement member are each configured to be engaged by a respective retention assembly when mounted on the fan assembly.

Abstract: A memory cell includes an ovonic threshold switch (OTS) selector containing a first electrode, a second electrode, an OTS located between the first electrode and the second electrode, and a current focusing layer containing discrete electrically conductive current focusing regions having a width of 30 nm or less located between the first electrode and the OTS, and a memory device located in electrical series with the OTS selector.

Abstract: There is provided a fan assembly comprising a fan body comprising a first air inlet and a second air inlet, the first air inlet and the second air inlet being provided on opposing halves of the fan body. The fan assembly also comprises a first filter assembly mounted on the fan body over the first air inlet, and a second filter assembly mounted on the fan body over the second air inlet. The fan body further comprises a first retention assembly that is configured to releasably engage both the first filter frame and the second filter frame, and a second retention assembly that is also configured to releasably engage both the first filter frame and the second filter frame.

Abstract: A phase change memory cell includes a first electrode, a second electrode located over the first electrode, a vertical pillar structure located between the first and second electrodes, the pillar structure containing a first phase change memory (PCM) material portion, a second PCM material portion and an intermediate electrode located between the first PCM material portion and the second PCM material portion, and a resistive liner containing a first segment electrically connected in parallel to the first PCM material portion between the first electrode and the intermediate electrode, and a second segment electrically connected in parallel to the second PCM material portion between the intermediate electrode and the second electrode. The first PCM material portion has a different electrical resistance than the second PCM material portion, and the first segment of the resistive liner has a different electrical resistance than the second segment of the resistive liner.

Abstract: Energy conversion systems that may employ control grid electrodes, acceleration grid electrodes, inductive elements, multi-stage anodes, and emissive carbon coatings on the cathode and anode are described. These and other characteristics may allow for advantageous thermal energy to electrical energy conversion.

Abstract: A phase change memory cell includes a first electrode, a second electrode located over the first electrode, a vertical pillar structure located between the first and second electrodes, the pillar structure containing a first phase change memory (PCM) material portion, a second PCM material portion and an intermediate electrode located between the first PCM material portion and the second PCM material portion, and a resistive liner containing a first segment electrically connected in parallel to the first PCM material portion between the first electrode and the intermediate electrode, and a second segment electrically connected in parallel to the second PCM material portion between the intermediate electrode and the second electrode. The first PCM material portion has a different electrical resistance than the second PCM material portion, and the first segment of the resistive liner has a different electrical resistance than the second segment of the resistive liner.

Abstract: Energy conversion systems that may employ control grid electrodes, acceleration grid electrodes, inductive elements, multi-stage anodes, and emissive carbon coatings on the cathode and anode are described. These and other characteristics may allow for advantageous thermal energy to electrical energy conversion.

Abstract: Energy conversion systems that may employ control grid electrodes, acceleration grid electrodes, inductive elements, multi-stage anodes, and emissive carbon coatings on the cathode and anode are described. These and other characteristics may allow for advantageous thermal energy to electrical energy conversion.

Abstract: Energy conversion systems that may employ control grid electrodes, acceleration grid electrodes, inductive elements, multi-stage anodes, and emissive carbon coatings on the cathode and anode are described. These and other characteristics may allow for advantageous thermal energy to electrical energy conversion.

Abstract: Energy conversion systems that may employ control grid electrodes, acceleration grid electrodes, inductive elements, multi-stage anodes, and emissive carbon coatings on the cathode and anode are described. These and other characteristics may allow for advantageous thermal energy to electrical energy conversion.

Abstract: Filter rods for use in the manufacture of cigarette filter elements are provided, with each rod having a longitudinal axis and incorporating a generally longitudinally extending filter material and a generally longitudinally extending strand within that filter material. A filter making unit receives a continuous supply of a filter material, and forms the filter material into a gathered composite having a continuous cylindrical shape. A continuous supply of a strand (e.g., colored thread) is provided and is introduced into the filter material gathered composite in the tongue of the filter making unit. The filter material and continuous strand positioned therein are formed into a continuous rod having the strand material laterally positioned within that rod, and the continuous rod is subdivided at pre-determined longitudinal intervals to provide a plurality of rod portions.

Abstract: There is provided a filter assembly arranged to be mounted over the air inlet of a fan assembly, the filter assembly comprising a filter frame arranged to support one or more filter media. The filter frame is provided with a first engagement member on a first edge of the filter frame and a second engagement member on a second edge of the filter frame, the first edge being opposite to the second edge. The first engagement member and the second engagement member are each configured to be engaged by a respective retention assembly when mounted on the fan assembly.

Abstract: There is provided a fan assembly comprising a fan body comprising a first air inlet and a second air inlet, the first air inlet and the second air inlet being provided on opposing halves of the fan body. The fan assembly also comprises a first filter assembly mounted on the fan body over the first air inlet, and a second filter assembly mounted on the fan body over the second air inlet. The fan body further comprises a first retention assembly that is configured to releasably engage both the first filter frame and the second filter frame, and a second retention assembly that is also configured to releasably engage both the first filter frame and the second filter frame.