Abstract: Methods, systems, and storage media for managing and removing participant groups on a social media platform. In an exemplary method, the disclosure comprises receiving a request to generate a participant group wherein the participant group comprises a plurality of members that can access the participant group. The method comprises receiving an expiration date to terminate the participant group. The method comprises generating a deletion request for the participant group, based on a lapse of the expiration date. The method comprises transmitting the deletion request to the participant group; and purging the participant group.

Abstract: A system configured for producing electric power from sea waves. The system includes a buoyant body; an electric generator including an input shaft adapted to rotate with respect to the buoyant body; a first arm coupled to the electric generator; a second arm; and a pivot joint rotatably joining the second arm to the arm. The pivot joint is at a distance, along the first arm, from the input shaft. The first arm connects the second arm to the generator. The tandem arms form a double pendulum system powering an autonomous floating sea analysing station.

Abstract: A method to keep selected messages in a networked conversation thread includes receiving, from a first participant in a networked conversation, a selection of a first message to keep from a sequence of messages in the networked conversation. The method includes verifying that the networked conversation is slated for deletion at a selected time after the selection of the first message, storing the first message in a folder accessible to multiple participants in the networked conversation, and notifying a second participant authoring the first message that the first message has been stored in the folder and is accessible to the participants in the networked conversation.

Abstract: A system configured for producing electric power from sea waves. The system includes a buoyant body; an electric generator including an input shaft adapted to rotate with respect to the buoyant body; a first arm coupled to the electric generator; a second arm; and a pivot joint rotatably joining the second arm to the first arm, said arm. The pivot joint is at a distance, along the first arm, from the input shaft. The first arm connects the second arm to the generator. The tandem arms form a double pendulum system powering an autonomous floating sea analysing station.

Abstract: This invention deals with a new alkylphenol ethoxylated free (APE-free) reactive nonionic surfactant with terminal unsaturation in the hydrophobic part comprising at least one of monoesters and diesters and a process to obtain the APE-free reactive nonionic surfactant comprising the alkoxylation step of fatty acid with terminal unsaturation or direct esterification of fatty acid with terminal unsaturation and glycol derivative. Furthermore, emulsion polymerized latexes are disclosed, which are polymerized with an anionic surfactant and a reactive nonionic surfactant of this invention. Latexes prepared according to this invention generated water-based coating compositions with high water resistance.