Abstract: A churn prediction model is presented that uses both behavioral data as well as user characteristics to predict whether a given user will churn (i.e., stop using) an application. Initially a training set of user interactions can be correlated to a churn probability value for various sequences of user activity. Then, as regards a real time user, user actions in navigating through the app may be recorded, and this information can be used, in addition to user characteristics, to predict the probability that this user will churn, thus implementing in a “nip churn in the bud” approach (or, the inverse, remain loyal and continue to use the app). In some embodiments, a partial set of user actions can be identified as subsequences of known churn sequences. To users performing those subsequences of activity, a real time message, offer or promotion may be sent so as to influence them not to churn.

Abstract: A container for thermal conditioning of a fluid under pressure, use of the container for thermally conditioning a fluid under pressure, a chemical reactor including the container and a polymerization process using the reactor, and a method of producing the container and the reactor. The container is bounded over at least part of its surface facing the outside by at least one external plate and facing the inside by at least one internal plate, the external plate being thicker than the internal plate, the external plate and the internal plate being joined together in places to define a space between joints for circulation of a heat-transfer fluid and the container including a mechanism to adjust the pressure of the heat-transfer fluid to that of the fluid under pressure.

Abstract: A method for drying a wet polymer including a drying carried out in a dryer containing at least heating element inside which a heat-transfer fluid flows, the heat-transfer fluid being low-pressure steam.

Abstract: A container for thermal conditioning of a fluid under pressure, use of the container for thermally conditioning a fluid under pressure, a chemical reactor including the container and a polymerization process using the reactor, and a method of producing the container and the reactor. The container is bounded over at least part of its surface facing the outside by at least one external plate and facing the inside by at least one internal plate, the external plate being thicker than the internal plate, the external plate and the internal plate being joined together in places to define a space between joints for circulation of a heat-transfer fluid and the container including a mechanism to adjust the pressure of the heat-transfer fluid to that of the fluid under pressure.