Abstract: A server system stores media library associated with a user. The media library includes at least one media file. The server system determines whether the media file is stored on a second computing device that is able to send the media file to the first computing device across a local network connecting the first computing device and the second computing device. If the determination indicates that the media file is stored on a second computing device that is able to send the stored media file to the first computing device across a local network connecting the first computing device and the second computing device, the server system sends causes the second computing device to send the media file to the first computing device across the local network such that the first computing device is able to output the media file to the user.

Abstract: In general, the subject matter described in this specification can be embodied in methods, systems, and program products for loading media files to a mobile computing device. A media library that includes media files is stored at a server system. Information indicating a present state of the mobile device is accessed, where the present state is based on the device being at a geographical location at a present time. Information indicating a previous state of the mobile device is accessed, where the previous state is based on the device being at a previous geographical location at a previous time. A selection of preferred media files are accessed based on the present state and the previous state. A selection of a subset of media files are accessed based on the preferred media files. At least a portion of each media file in the subset is transmitted to the mobile device.

Abstract: In general, the subject matter described in this specification can be embodied in methods, systems, and program products for loading media files to a mobile computing device. A media library that includes media files is stored at a server system. Information indicating a present state of the mobile device is accessed, where the present state is based on the device being at a geographical location at a present time. Information indicating a previous state of the mobile device is accessed, where the previous state is based on the device being at a previous geographical location at a previous time. A selection of preferred media files are accessed based on the present state and the previous state. A selection of a subset of media files are accessed based on the preferred media files. At least a portion of each media file in the subset is transmitted to the mobile device.

Abstract: Data indicates characteristics of a user's multiple media files. The multiple media files are associated with a media library. At least one of the multiple media files matches content in a master media file. The content in the matching media file is of a quality that is lower than the quality of the master media file. The user can provide payment for access to the master media file and, if the user does so, the master media file is associated with the media library and the user is provided with access to the master media file.

Abstract: In general, the subject matter described in this specification can be embodied in methods, systems, and program products for loading media files to a mobile computing device. A media library that includes media files is stored at a server system. Information indicating a present state of the mobile device is accessed, where the present state is based on the device being at a geographical location at a present time. Information indicating a previous state of the mobile device is accessed, where the previous state is based on the device being at a previous geographical location at a previous time. A selection of preferred media files are accessed based on the present state and the previous state. A selection of a subset of media files are accessed based on the preferred media files. At least a portion of each media file in the subset is transmitted to the mobile device.

Abstract: Methods, systems and program products for replacing a master media file. Data indicates characteristics of a first user's multiple media files. At least one of the multiple media files matches content in a master media file. The content in the matching media file is of a second quality that is higher than the first quality of the master media file. A server system stores the matching media file in place of the master media file. The server system receives a request from a second user for content matching the master media file, and accesses quality parameters that indicate the second user can access a version of the content at a third quality that is less than the second quality. A media file that contains the requested content at the third quality is generated and sent to the second user.

Abstract: A server system stores media library associated with a user. The media library includes at least one media file. The server system determines whether the media file is stored on a second computing device that is able to send the media file to the first computing device across a local network connecting the first computing device and the second computing device. If the determination indicates that the media file is stored on a second computing device that is able to send the stored media file to the first computing device across a local network connecting the first computing device and the second computing device, the server system sends causes the second computing device to send the media file to the first computing device across the local network such that the first computing device is able to output the media file to the user.

Abstract: Methods, systems and program products for replacing a master media file. Data indicates characteristics of a first user's multiple media files. At least one of the multiple media files matches content in a master media file. The content in the matching media file is of a second quality that is higher than the first quality of the master media file. A server system stores the matching media file in place of the master media file. The server system receives a request from a second user for content matching the master media file, and accesses quality parameters that indicate the second user can access a version of the content at a third quality that is less than the second quality. A media file that contains the requested content at the third quality is generated and sent to the second user.

Abstract: Data indicates characteristics of a user's multiple media files. The multiple media files are associated with a media library. At least one of the multiple media files matches content in a master media file. The content in the matching media file is of a quality that is lower than the quality of the master media file. The user can provide payment for access to the master media file and, if the user does so, the master media file is associated with the media library and the user is provided with access to the master media file.

Abstract: Data indicates characteristics of a user's multiple media files. The multiple media files are associated with a media library. At least one of the multiple media files matches content in a master media file. The content in the matching media file is of a quality that is lower than the quality of the master media file. The user can provide payment for access to the master media file and, if the user does so, the master media file is associated with the media library and the user is provided with access to the master media file.

Abstract: A server system stores media library associated with a user. The media library includes at least one media file. The server system determines whether the media file is stored on a second computing device that is able to send the media file to the first computing device across a local network connecting the first computing device and the second computing device. If the determination indicates that the media file is stored on a second computing device that is able to send the stored media file to the first computing device across a local network connecting the first computing device and the second computing device, the server system sends causes the second computing device to send the media file to the first computing device across the local network such that the first computing device is able to output the media file to the user.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for providing incentives for media sharing. In one aspect, a method includes receiving a request from a first user to share a media item with a second user, and providing the second user with access to the media item. The method includes determining that the second user has performed an action related to the media item, and in response to determining that the second user has performed the action related to the media item, accessing a referral attribute associated with the first user, the referral attribute being related to the action. The method includes comparing the referral attribute to a reference value, based on comparing the referral attribute to the reference value, determining an amount of referral credit, and providing the determined amount of referral credit to the first user.

Abstract: A server system stores media library associated with a user. The media library includes at least one media file. The server system determines whether the media file is stored on a second computing device that is able to send the media file to the first computing device across a local network connecting the first computing device and the second computing device. If the determination indicates that the media file is stored on a second computing device that is able to send the stored media file to the first computing device across a local network connecting the first computing device and the second computing device, the server system sends causes the second computing device to send the media file to the first computing device across the local network such that the first computing device is able to output the media file to the user.

Abstract: Methods, systems and program products for replacing a master media file. Data indicates characteristics of a first user's multiple media files. At least one of the multiple media files matches content in a master media file. The content in the matching media file is of a second quality that is higher than the first quality of the master media file. A server system stores the matching media file in place of the master media file. The server system receives a request from a second user for content matching the master media file, and accesses quality parameters that indicate the second user can access a version of the content at a third quality that is less than the second quality. A media file that contains the requested content at the third quality is generated and sent to the second user.

Abstract: In general, the subject matter described in this specification can be embodied in methods, systems, and program products for loading media files to a mobile computing device. A media library that includes media files is stored at a server system. Information indicating a present state of the mobile device is accessed, where the present state is based on the device being at a geographical location at a present time. Information indicating a previous state of the mobile device is accessed, where the previous state is based on the device being at a previous geographical location at a previous time. A selection of preferred media files are accessed based on the present state and the previous state. A selection of a subset of media files are accessed based on the preferred media files. At least a portion of each media file in the subset is transmitted to the mobile device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for providing incentives for media sharing. In one aspect, a method includes receiving a request from a first user to share a media item with a second user, and providing the second user with access to the media item. The method includes determining that the second user has performed an action related to the media item, and in response to determining that the second user has performed the action related to the media item, accessing a referral attribute associated with the first user, the referral attribute being related to the action. The method includes comparing the referral attribute to a reference value, based on comparing the referral attribute to the reference value, determining an amount of referral credit, and providing the determined amount of referral credit to the first user.

Abstract: Methods, systems and program products for replacing a master media file. Data indicates characteristics of a first user's multiple media files. At least one of the multiple media files matches content in a master media file. The content in the matching media file is of a second quality that is higher than the first quality of the master media file. A server system stores the matching media file in place of the master media file. The server system receives a request from a second user for content matching the master media file, and accesses quality parameters that indicate the second user can access a version of the content at a third quality that is less than the second quality. A media file that contains the requested content at the third quality is generated and sent to the second user.

Abstract: In general, the subject matter described in this specification can be embodied in methods, systems, and program products for loading media files to a mobile computing device. A media library that includes media files is stored at a server system. Information indicating a present state of the mobile device is accessed, where the present state is based on the device being at a geographical location at a present time. Information indicating a previous state of the mobile device is accessed, where the previous state is based on the device being at a previous geographical location at a previous time. A selection of preferred media files are accessed based on the present state and the previous state. A selection of a subset of media files are accessed based on the preferred media files. At least a portion of each media file in the subset is transmitted to the mobile device.

Abstract: A thrust chamber assembly for liquid fueled rocket engines and the method of making it wherein a two-piece mandrel wrapped with a silica tape saturated with a phenolic resin, the tape extending along the mandrel and covering the combustion chamber portion of the mandrel to the throat portion. The phenolic in the tape is cured and the end of the wrap is machined. The remainder of the mandrel is wrapped with a third silica tape. The resin in the third tape is cured and the assembly is machined. The entire assembly is then wrapped with a tow of graphite fibers wetted with an epoxy resin and, after the epoxy resin is cured, the graphite is machined to final dimensions.

Abstract: A thrust chamber assembly for liquid fueled rocket engines and the method of making it wherein a two-piece mandrel having the configuration of an assembly having a combustion chamber portion connected to a nozzle portion through a throat portion is wrapped with a silica tape saturated with a phenolic resin, the tape extending along the mandrel and covering the combustion chamber portion of the mandrel to the throat portion. The width of the tape is positioned at an angle of 30 to 50° to the axis of the mandrel such that one edge of the tape contacts the mandrel while the other edge is spaced from the mandrel. The phenolic in the tape is cured and the end of the wrap is machined to provide a frustoconical surface extending at an angle of 15 to 30° with respect to the axis of the mandrel for starting a second wrap on the mandrel to cover the throat portion.