Abstract: A different combination of multiple portions of a content item is selected for display to each of multiple sets of users of an online messaging application. The different combination of portions of the content item is sent for display to the corresponding set of users within a user interface of the online messaging application in association with information identifying a set of message threads in which each user is participating. A request to view the entire content of the content item is then received from a subset of each of the sets of users and a performance metric associated with each combination of portions of the content item is tracked based on the received request. Based on the performance metric, a performance of each portion of the content item is evaluated and used to select an optimal combination of the portions of the content item.

Abstract: An online system allows users to exchange messages with other users, including entities such as businesses. The online system determines a metric describing measure of an entity's responsiveness to messages received via the online system based on a number of messages to which the entity responds and times for the entity to respond to messages. The online system displays an indication of the metric for an entity in connection with content identifying the entity. For example, the indication is displayed in conjunction with a content item identifying the entity, such as a content item including a link to initiate communication of a message to the entity.

Abstract: A messaging application provides a user interface displaying a user's threads, where each thread includes at least one message between the user and another user. Via the user interface, the user may select a thread to access messages in the thread or to add one or more messages to the thread. The messaging application also displays a sponsored content item along with the threads, but displays the sponsored content item below threads having unread messages to avoid reducing engagement with threads the user is likely to select. In some embodiments, the messaging application predicts a probability that displaying the sponsored content item above a thread including an unread message thread will cause the user not to engage with the thread and displays the sponsored content item above the thread including the unread message if the predicted probability is below a threshold.

Abstract: A different combination of multiple portions of a content item is selected for display to each of multiple sets of users of an online messaging application. The different combination of portions of the content item is sent for display to the corresponding set of users within a user interface of the online messaging application in association with information identifying a set of message threads in which each user is participating. A request to view the entire content of the content item is then received from a subset of each of the sets of users and a performance metric associated with each combination of portions of the content item is tracked based on the received request. Based on the performance metric, a performance of each portion of the content item is evaluated and used to select an optimal combination of the portions of the content item.

Abstract: The present disclosure is directed to systems and methods for providing dynamic communication threads in response to a detected interaction with a sponsored digital content item. For example, systems and method described herein detect a user interaction with a sponsored digital content item and generate a screened communication thread between the user and the sponsor that is not available to the sponsor. The screened communication thread serves as a reminder to the user of the sponsored digital content item. Systems and methods described herein convert the screened communication thread to an open communication thread based on user interaction with the screened communication thread (e.g., after the user submits a reply in the screened communication thread). Thus, systems and methods described herein protect the user's online privacy unless and until the user indicates a desire to interact with the sponsor.

Abstract: The present disclosure is directed to systems and methods for providing dynamic communication threads in response to a detected interaction with a sponsored digital content item. For example, systems and method described herein detect a user interaction with a sponsored digital content item and generate a screened communication thread between the user and the sponsor that is not available to the sponsor. The screened communication thread serves as a reminder to the user of the sponsored digital content item. Systems and methods described herein convert the screened communication thread to an open communication thread based on user interaction with the screened communication thread (e.g., after the user submits a reply in the screened communication thread). Thus, systems and methods described herein protect the user's online privacy unless and until the user indicates a desire to interact with the sponsor.

Abstract: One or more embodiments of the disclosure provide a promotional messaging system for efficiently providing promotional messages to customers via an electronic messaging system. For example, in one or more embodiments, the promotional messaging system identifies users of the electronic messaging system that have previously communicated with a merchant as part of a customized audience. Additionally, in some embodiments, the promotional messaging system analyzes activity patterns of the users to provide improved delivery of promotional messages in a non-intrusive, private, and timely manner. Overall, the promotional messaging system described herein improves communications via an electronic messaging system between users and a merchant.

Abstract: One or more embodiments of the disclosure provide a promotional messaging system for efficiently providing promotional messages to customers via an electronic messaging system. For example, in one or more embodiments, the promotional messaging system identifies users of the electronic messaging system that have previously communicated with a merchant as part of a customized audience. Additionally, in some embodiments, the promotional messaging system analyzes activity patterns of the users to provide improved delivery of promotional messages in a non-intrusive, private, and timely manner. Overall, the promotional messaging system described herein improves communications via an electronic messaging system between users and a merchant.

Abstract: One or more embodiments of the disclosure provide a promotional messaging system for efficiently providing promotional messages to customers via an electronic messaging system. For example, in one or more embodiments, the promotional messaging system identifies users of the electronic messaging system that have previously communicated with a merchant as part of a customized audience. Additionally, in some embodiments, the promotional messaging system analyzes activity patterns of the users to provide improved delivery of promotional messages in a non-intrusive, private, and timely manner. Overall, the promotional messaging system described herein improves communications via an electronic messaging system between users and a merchant.

Abstract: The invention disclosed herein provides tunable process for the preparation of water dispersive, biocompatible, fluorescent L-cysteine labeled gold (Au) quantum clusters without using any toxic reactants. Further the invention discloses application of synthesized fluorescent gold (Au) quantum clusters in the field of nano-medicine, fluorescence imaging and florescence based sensors.