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. The primary user has a computed measure of affinity for candidates in the set through a social network, or the candidate in the set is otherwise known to the primary user. A facial recognition score is calculated for each candidate. A subset of candidates is selected, wherein each candidate in the subset has a facial recognition score above a predetermined threshold. A candidate score is calculated for each candidate based on the facial recognition score and the computed measure of affinity. A winning candidate is selected based on the candidate scores.

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: 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 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 includes receiving data corresponding to a set of sensor values and one or more indicators that each correspond to one of a number of physical states of a client device. The client device includes a first and second set of sensors. The method also includes generating a number of functions that each determine a probability that the client device is in a respective one of the physical states. The determination includes correlating the set of sensor values with a corresponding physical state of the client device. A first function of the number of functions is based on sensor values of the first set of sensors. A second function of the number of functions is based on sensor values of the second set of sensors. The method also includes sending the number of functions to the client device.

Abstract: In one embodiment, a social networking system maintains a moving average of the number of connection problems, including socket timeouts and failed uploads, per client in a geographic area to determine whether the wireless data network serving the geographic area is overloaded. In response to detecting a network overload, the social networking system may transmit an instruction to the clients in the particular geographic area to enter one of a plurality of traffic throttling modes. In particular embodiments, the social networking system maintains a historical log of network overload conditions, and uses the historical log to generate an estimate of the wireless network capacity serving a geographic area. Thus, the social networking system may preemptively transmit instructions to clients to enter a bandwidth-conservation mode when the estimated traffic demand exceeds the estimated capacity for a particular geographic region.

Abstract: In one embodiment, a method includes receiving data associated with multiple first client devices, the data corresponding to a first set of sensor values and physical-state indicators of the first client devices; receiving data associated with a second client device corresponding to a second set of sensor values, the second client device including a first and a second set of sensors; generating functions that each determine a probability that the second client device is in a particular physical state, wherein the determination includes correlating the second set of sensor values with a corresponding physical state of the second client device based on the data associated with the multiple first client devices, and wherein a first function is based on values of the first set of sensors and a second function is based on values of the second set of sensors; and sending the generated functions to the second client device.

Abstract: In particular embodiments, a social TV dongle receives a first video stream from a content source using a first interface and receives social content from a social-networking system using a second interface. The social TV dongle generates a modified video stream using at least the first video stream and the social content and sends the modified video stream to a display device using a third interface.

Abstract: Particular embodiments may retrieve information associated with one or more nodes of a social graph from one or more data stores. A node may comprise a user node or a concept node. Each node may be connected by edges to other nodes of a social graph. A first user may be associated with a first user node of the social graph. Particular embodiments may detect that the first user is entering an input term. Predictive typeahead results may be provided as the first user enters the input term. The predictive typeahead results may be based on the input term. Each predictive typeahead result may include at least one image. Each predictive typeahead result may correspond to at least one node of the social graph.

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 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.

Abstract: In particular embodiments, one or more computer systems of a social-networking system determine information associated with a product displayed on a display device and access a database of known products. The one or more computer systems of the social-networking system determine, by comparing the database of known products with the determined information associated with the product, an identity of the product displayed on the display device. The one or more computer systems of the social-networking system provide one or more instructions to display media content related to the identified product.

Abstract: In particular embodiments, one or more computer systems of a social-networking system identify a user viewing video content on a first display device, identify the video content being viewed on the first display device by the user, and determine a second display device associated with the identified user. The one or more computer systems of the social-networking system determine an action related to the video content being viewed by the user on the first display device and provide one or more instructions to the determined second display device to display a call-to-action associated with the determined action.

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: In one embodiment, note is received from a first user, comprising a message and a first location. The first location may be specified by the first user. A number of second users are identified based on a respective second location of each identified second user being within a threshold distance of the first location. The message of the note is sent to the identified second users. When the message is sent, it is determined whether a current location of the first user is within a predetermined distance from the first location. If the current location is within the predetermined distance, a notification is sent to the first user informing the first user that the message has been sent to the identified second users.

Abstract: A method including, by one or more computing systems, receiving an indication of a communication from a first user to a second user, calculating an implicit urgency score of the communication, calculating a composite urgency score, determining an urgency of the communication and providing an indication of the urgency as determined for presentation to the second user. The implicit urgency score may be based at least in part on information accessible by the computing systems. The composite urgency score may be based at least in part on the implicit urgency score. The urgency of the communication may be based at least in part on the composite urgency score.

Abstract: In one embodiment, a method includes receiving data corresponding to a set of sensor values and one or more indicators that each correspond to one of a number of physical states of a client device. The client device includes a first and second set of sensors. The method also includes generating a number of functions that each determine a probability that the client device is in a respective one of the physical states. The determination includes correlating the set of sensor values with a corresponding physical state of the client device. A first function of the number of functions is based on sensor values of the first set of sensors. A second function of the number of functions is based on sensor values of the second set of sensors. The method also includes sending the number of functions to the client device.

Abstract: In one embodiment, a first computing device receives a communication from a second computing device; and if the communication is a ping from the second computing device, then sends a response to the ping to the second computing device using a secondary processor of the first computing device.

Abstract: A social networking system determines common location information included in a set of posts between a set of users. Using the determined common location information, the social networking system generates a message interface for grouping a set of messages into a conversation thread. For example, the messages may be grouped into a conversation thread based on common location information in the messages and being associated with participants sharing a social relationship. When a group conversation is created, the social networking system presents a message interface containing the conversation thread to one or more participants of the thread. The social networking system adds the set of messages to the conversation thread based on social information about the social relationships among the participants of the conversation thread. The social networking system then presents the message interface for display to one or more of the participants.

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.