Abstract: Sleep tracking systems and techniques for monitoring two or more co-sleepers in a single bed are disclosed. Such systems and techniques may incorporate sleeper identification, as well as various non-user-specific aspects. Some implementations may incorporate user-specific or user-tailored alarm functionality.

Abstract: A system for use with a connection comprising a terminus opening into an underground vault. The system includes a perturbation detector and a system controller. The perturbation detector is configured to detect values of each of one or more properties and transmit a signal encoding the values to the system controller. The system controller is configured to receive the signal, use at least one of the values to determine whether a fire is occurring or has occurred, and alert a user when the system controller determines that the fire is occurring or has occurred.

Abstract: A social networking system displays information about a user via a timeline included in a profile page. Narrative data about a user stored in a social networking system, including data about the user and social network activities related to the user is accessed. Timeline units summarizing information about the user are generated from the narrative data. When a viewing user requests a profile page, timeline units are displayed based information related to the viewing user and interactions with the profile page by other users connected to the viewing user. Users that administer the profile page are presented with additional information when viewing the profile page, allowing the administering users to modify appearance of the timeline or to identify actions for an administering user to take to increase interaction with the profile page.

Abstract: An online system presents a feed of content including content items and one or more scrollable content units to a user of the online system. A scrollable content unit includes an ordered set of content items sharing a common attribute, such as advertisement requests associated with the same advertising campaign or images associated with a common subject. The scrollable content unit is scrollable in a direction that is orthogonal to an orientation of the feed of content, allowing presentation of additional content items from the ordered set when a user navigates through the ordered set. When all content items in the ordered set have been displayed by the scrollable content unit, an interaction with the scrollable content unit by the user presents additional content associated with the ordered set of content items, such as a page associated with the common attribute of content items in the ordered set.

Abstract: A social networking system user creates an album including a shared collection of content (a “shared album”) and associates a privacy model with the shared album. The privacy model specifies additional users of the social networking system authorized to access content items in the shared album and specifies types of actions users authorized to access content items in the shared album are permitted to perform to content items in the shared album. Notifications describing actions associated with content items in a shared album may be presented to users authorized to access the shared album. The social networking system may prompt a user to create a shared album containing based on actions performed by the user or performed by connected to the user.

Abstract: A low-profile band latch mechanism that is configured to connect a wristband to a fitness tracker or other wrist-wearable device is provided.

Abstract: An online system selects advertisements for inclusion in a scrollable advertisement unit that includes a display area and multiple advertisements, each associated with a position in the scrollable advertisement unit. Positions in the scrollable advertisement unit are ranked based on a measure of predicted performance of an advertisement in each position. Advertisements are ranked based on a probability of being viewed by a user if associated with a particular position in the scrollable advertisement unit and, optionally, on a probability of presenting an advertisement based on characteristics of the advertisement. The position ranking and the advertisement ranking are used to associate advertisements with positions. For example, an advertisement is associated with a position having a location in the position ranking corresponding to the advertisement's position in the advertisement ranking.

Abstract: A social networking system presents suggestions to a user of a social networking system to use or install one or more applications accessible in the system. The social networking system offers suggestions by ranking candidate applications for a particular user and selecting applications to recommend based on the rankings. Advertisers associated with some applications may bid to boost the rankings of an application, making it more likely to appear for a given user.

Abstract: An online system presents a feed of content including content items and one or more scrollable content units to a user of the online system. A scrollable content unit includes an ordered set of content items and a display area presenting fewer than all of the content items of the ordered set at a time. The user navigates through the ordered set of content items in the display area by interacting with the scrollable content unit. If the user navigates through fewer than all of the content items in the ordered set, the online system modifies the ordered set. If the scrollable content unit is again provided to the user, the scrollable content unit presents content items based the modified ordered set. For example, the modified ordered set prioritizes presentation of content items from the ordered set that were not previously presented to the user.