Abstract: A computer system determines one or more media placement opportunities for a media application at a client device and generates a request message that includes an indication of each media placement opportunity. The request message has a hierarchical framework with a plurality of levels that includes, for each media placement opportunity: (i) a media application context level; and (ii) a sub-context level. The computer system transmits the request message to a server system; and receives, from the server system, a response to the request message that includes one or more media content items selected based on the information included in the hierarchical framework of the request message. The computer system provides, to the media application at the client device, at least one of the one or more media content items within at least one of the media placement opportunities.

Abstract: A method of recycling solar panels, including a frame, glass, silicon wafers, and wiring, incorporates the steps of: (a) delaminating the solar panel by breaking down ethylene-vinyl acetate polymer in the solar panel to generate fumed acetic acid, (b) dissolving silver from the silicon wafers of the solar panel in a metal recovery solution using the fumed acetic acid generated during the delaminating and (c) recovering the dissolved silver from the metal recovery solution.

Abstract: A server determines, at a first predetermined time, a default decision as to whether to provide a first media content clip after the end of a first media content item. At a second predetermined time, after the first predetermined time, the server initiates a determination of a first decision as to whether to provide the first media content clip after the end of the first media content item. In accordance with the first decision being reached within a predetermined latency period, the server provides the first media content clip to the first electronic device in accordance with the first decision. In accordance with a determination that the predetermined latency period has elapsed without the first decision being reached, provides the first media content clip to the first electronic device in accordance with the default decision.

Abstract: A method of recycling lithium-ion batteries includes steps of: roasting black mass from lithium-ion batteries to produce a reduced black mass, conducting simultaneous aqueous leaching and wet magnetic separation of the reduced black mass for (a) extracting soluble lithium species and (b) enriching metallic Ni—Co and subjecting the extracted soluble lithium species to electrochemical lithium ion purification. A system for recycling lithium ion batteries includes a roaster, an aqueous leaching and wet magnetic separator and an electrochemical lithium ion separator.

Abstract: A server determines, at a first predetermined time, a default decision as to whether to provide a first media content clip after the end of a first media content item. At a second predetermined time, after the first predetermined time, the server initiates a determination of a first decision as to whether to provide the first media content clip after the end of the first media content item. In accordance with the first decision being reached within a predetermined latency period, the server provides the first media content clip to the first electronic device in accordance with the first decision. In accordance with a determination that the predetermined latency period has elapsed without the first decision being reached, provides the first media content clip to the first electronic device in accordance with the default decision.

Abstract: A method performed at a server system includes providing to a device a media content item included in a listening session. The method includes receiving from the device characteristics of the listening session corresponding to a first time and determining, based on the characteristics, a default decision as to whether to provide a media content clip after the media item. The method includes receiving characteristics of the listening session corresponding to a second time and initiating a determination of a first decision as to whether to provide the media content clip after the media item. In accordance with the first decision being reached within a latency period, the media content clip is provided in accordance with the first decision. In accordance with the latency period being lapsed without the first decision being reached, the media content clip is provided in accordance with the default decision.

Abstract: A method performed at a server system includes providing to a device a media content item included in a listening session. The method includes receiving from the device characteristics of the listening session corresponding to a first time and determining, based on the characteristics, a default decision as to whether to provide a media content clip after the media item. The method includes receiving characteristics of the listening session corresponding to a second time and initiating a determination of a first decision as to whether to provide the media content clip after the media item. In accordance with the first decision being reached within a latency period, the media content clip is provided in accordance with the first decision. In accordance with the latency period being lapsed without the first decision being reached, the media content clip is provided in accordance with the default decision.