Abstract: In one embodiment, a method includes receiving a request at a wireless access point from a client system to access a network through the wireless access point. The wireless access point sends an identifier associated with the client system to a social-networking system, the social-networking system including user profiles arranged in one or more social graphs. The social graphs store relationships between the user profiles. The method further includes receiving at the wireless access point from the social-networking system an authorization determination. The authorization determination is based upon a first user profile of the plurality of user profiles. The first user profile includes the identifier associated with the client system. The method further includes providing the client system with access to the network through the wireless access point in accordance with the authorization determination.

Abstract: In one embodiment, a geo-social networking system automatically tags one or more social contacts of a first user to a photo of the first user by ranking the social contacts based on spatial and temporal proximity to the first user, and in response to the first user's selection of one or more top ranked social contacts, associating the selected social contacts to the photo.

Abstract: In particular embodiments a social networking system captures data associated with video content provided to a first user of a social-networking system, identifies, using the captured data, the video content provided to the first user, and updates a graph of the social-networking system to associate the first user with the identified video content. The graph of the social-networking system has a plurality of nodes and edges connecting the nodes. The nodes of the graph include user nodes that are each associated with a particular user of the social-networking system.

Abstract: In particular embodiments, one or more computer systems of a social-networking system determine a first media device of a first user of a social-networking system and determine a second media device of a second user of the social-networking system. The one or more computer systems access a social graph of the social-networking system, update the social graph based on the determined first and second media devices, and stream media from the first media device to the second media device using the updated social graph. The social graph includes nodes and edges connecting the nodes, the nodes including user nodes that are each associated with a particular user of the social-networking system and concept nodes that are each associated with a particular media device.

Abstract: In particular embodiments, one or more computer systems of a social-networking system determine available media content from one or more content sources and query a social graph of a social-networking system for social content associated with a user of the social-networking system. The social graph includes nodes and edges connecting the nodes. The nodes include user nodes that are each associated with a particular user of the social-networking system. The one or more computer systems of the social-networking system determine, using the social content and the available media content, a plurality of social coefficients for the user, determine, based on the determined social coefficients, recommended media content for the user, and provide the recommended media content for display in a programming guide on a display device.

Abstract: In one embodiment, a method comprising by one or more computing devices, transmitting, from a first mobile device, a first message that includes a first user identifier corresponding to a first user of the first mobile device, wherein the first user identifier corresponds to a user account of the first user in a social-networking system, receiving, at the first mobile device, one or more second messages that includes a second user identifier corresponding to a second mobile device within a direct radio connectivity of the first mobile device, wherein the second user identifier corresponds to a respective user account of a second user in the social-networking system, and storing, at the first mobile device, information received in the second message for access by one or more applications hosted on the first mobile device.

Abstract: In one embodiment, one or more computing devices determine, substantially in real time and locally at a mobile device, one or more current dynamic operating conditions of the mobile device related to energy consumption by the mobile device. The computing devices identify a pre-determined device state that corresponds to the current dynamic operating conditions of the mobile device and determine, based at least in part on the pre-determined device state, an action for the mobile device to take, the action being related to energy consumption by the mobile device.

Abstract: In particular embodiments, one or more images associated with a primary user are received. The image(s) may comprise single images, a series of related images, or video frames. In each image, one or more faces are detected and/or tracked. For each face, a set of one or more candidates are selected who may be identified with the face. A candidate score is calculated for each candidate based on a computed measure of affinity of the primary user for a particular candidate, a facial recognition score comparing the candidate to the face, and a geographic proximity of the candidate to the primary user at a time when the one or more images were created. A winning candidate is selected based on the candidate scores.

Abstract: In one embodiment, a method comprises maintaining a set of connections for the first computing device, intercepting a request from a software application executing on the first computing device to establish a connection with a second computing device, selecting from the set of connections an available connection, and assigning the available connection to the software application for connecting to the second computing device.

Abstract: In one embodiment, a method includes determining for each of multiple countdowns to an automatic screen timeout of a computing device whether the countdown was too long or too short. The countdown is too short if user interaction with the computing device occurred within a first pre-determined amount of time after the automatic screen timeout. The countdown is too long if user interaction with the computing device turned off a screen of the computing device prior to a second pre-determined amount of time before the automatic screen timeout. The method includes determining an underage of each of one or more of the countdowns that was too short; determining an overage of each of one or more of the countdowns that was too long; and adjusting a countdown length of the automatic screen timeout based at least in part on the underages or overages.

Abstract: In one embodiment, in response to data to be transmitted to or from an electronic device, the electronic device determines whether the electronic device currently has a first network connection with a sufficiently high bandwidth. If the electronic device currently does not have a first network connection with a sufficiently high bandwidth, then the electronic device estimates a future time when the electronic device is likely to have a second network connection with a sufficiently high bandwidth, and schedules transmission of the data at the future time.

Abstract: In one embodiment, a method comprises monitoring one or more sensors of a computing device that is in a locked state and is associated with an authorized user of a social-networking system, identifying, based on information associated with the authorized user, content to be downloaded from the social-networking system, and downloading the identified content from the social-networking system, wherein the identified content is stored for display after the computing device is unlocked. The downloading may be in response to determining that an operation to unlock the computing device is imminent, and the content may include commonly-viewed content. The downloading may include downloading one or more notifications from the social-networking system. The downloading may be based on one or more previous habits of the authorized user. The information associated with the authorized user may include information indicating that the authorized user habitually checks one or more sites or feeds.

Abstract: In particular embodiments, one or more computer systems of a social-networking system determine identities of one or more users in proximity to a display device and query a social graph of the social-networking system for social content associated with the determined identities. The social graph includes nodes and edges connecting the nodes. The nodes include user nodes that are each associated with a particular user of the social-networking system. The one or more computer systems of the social-networking system identify, using the social content, recommended media content for the one or more users in proximity to the display device and provide a playlist for display on the display device. The playlist includes the recommended media content for the one or more users in proximity to the display device.

Abstract: In one embodiment, a computing device determines a communication to be sent to a client computing device. The communication could be a push notification or a keep-alive message from a social-networking system, the client computing device being associated with a user of the social-networking system. The computing device determines that a plurality of network connections already exists between the social-networking system and the client computing device, wherein at least one of the network connections is reserved for, and dedicated exclusively to, sending or receiving notifications or keep-alive messages. The computing device sends the communication to the client computing device using the reserved and dedicated network connection.

Abstract: A method including, by a computing device, receiving an indication of an electronic communication from a first user to a second user, receiving a location of the first user, determining an urgency of the electronic communication based at least in part on the location of the user, and providing an indication of the urgency as determined for presentation to the second user.

Abstract: In particular embodiments, one or more computer systems of a social-networking system provide social content for display in a mobile application running on a mobile device of a user of the social-networking system. The mobile application is configured to display the social content and an interface for selecting media content to view on a display device. The social content is from a social graph of the social-networking system. The social graph includes nodes and edges connecting the nodes. The nodes include user nodes that are each associated with a particular user of the social-networking system. The one or more computer systems of the social-networking system receive an indication from the mobile application that an option to view particular media content has been selected and provide one or more instructions to display the selected particular media content on the display device.

Abstract: A method is provided for automatically determining an event and tagging the event to photos uploaded from multiple users based on social and spatio-temporal proximity. The method includes receiving a first media object uploaded by a first user of a social network. A determination is made that the first media object is associated with a first event. At least one event tag is associated with the first media object. The first media object and the at least one event tag is displayed in a newsfeed associated with a second user associated with the social network.

Abstract: In one embodiment, a request to share a message is received from a first user. The request includes a first location, the message, and note-access criteria for sharing the message based on one or more groups of second users. A particular second user is identified having a second location that is within a threshold distance of the first location. Based on the note-access criteria and one or more groups associated with the particular second user, it is determined that the message should be shared with the particular second user, the message is sent to the particular second user, and a location of the first user is determined to be within a predetermined distance from the first location. If the first user is currently within the predetermined distance, a notification is sent to the first user informing the first user that the message was sent to the particular second user.

Abstract: In one embodiment, while a mobile electronic device is in a first operation state, it receives sensor data from one or more sensors of the mobile electronic device. The mobile electronic device in a locked state analyzes the sensor data to estimate whether an unlock operation is imminent, and in response to a positive determination, initializes the camera subsystem so that the camera is ready to capture a face as soon as the user directs the camera lens to his or her face. In particular embodiments, the captured image is utilized by a facial recognition algorithm to determine whether the user is authorized to use the mobile device. In particular embodiments, the captured facial recognition image may be leveraged for use on a social network.

Abstract: In one embodiment, a first computing device receives a communication from a second computing device. If the communication is a keep-alive ping from the second computing device for a network connection between the first computing device and the second computing device, then the first computing device sends a response to the ping to the second computing device using a secondary processor of the first computing device.