Abstract: A computer-implemented method for monitoring user activity during content presentation at a content presentation device having an input interface for receiving input from the user, the method comprising performing the following steps at the content presentation device: obtaining content to be presented to the user; monitoring user's actions input via the input interface while presenting the content to the user; calculating a user satisfaction rating; storing the user satisfaction rating in a memory of the user device; characterized by: when monitoring user's actions, determining volume level changes and navigation commands input by the user; and calculating the user satisfaction rating value (R) as a function of a volume level rating (R_VL) having a value dependent on determined volume level changes and predefined volume level patterns and a navigation commands rating (R_NC) having a value dependent on determined navigation commands and predefined content navigation patterns.

Abstract: Method for audio volume control, the method comprising the steps of: receiving (301) a volume change request; changing (304) the volume according to a volume change step; the method being characterized in that the volume change step determination (302) is executed by applying one or more rules wherein each rule provides a definition of at least two ranges, with respect to a monitored condition, wherein the volume change step, associated with each such range, is different; storing a new volume change step in a volume step register (120).

Abstract: Method for audio volume control, the method comprising the steps of: receiving (301) a volume change request; changing (304) the volume according to a volume change step; the method being characterized in that the volume change step determination (302) is executed by applying one or more rules wherein each rule provides a definition of at least two ranges, with respect to a monitored condition, wherein the volume change step, associated with each such range, is different; storing a new volume change step in a volume step register (120).

Abstract: Method for managing content deletion from a computer memory, the method comprising the steps of: reading free storage space amount (601); monitoring data storage within at least one time window and obtaining amount of stored data (602); associating the stored data amount with each time window (603); verified presence of a specified condition (604); obtaining (605) a list of files to delete, according to predefined rules, wherein the amount of data used by the files, present on list of files to delete, exceeds the stored data amount associated with the at least one time window; deleting (606) the files identified by the list of files to delete.