Abstract: A first communication channel is established between a user device and a server using a cellular network. The user device receives a timeout interval for the first communication channel. The user device transmits a packet to maintain the first communication channel when the user device detects that other data is being transmitted using a second communication channel during the timeout interval.

Abstract: A fulfillment services provider may offer export services to merchants, including generation of required export documentation; calculation, collection, and remittance of customs duties; and transportation via an international carrier. Such export services may be offered through a registration service, and may be integrated with other fulfillment services provided to registered merchants (e.g., domestic order fulfillment and/or warehousing of inventory), or may be offered to merchants that do not receive other fulfillment services from the provider. Export services may be provided to merchants who certify that all registered or specified items may be legally exported to all (or specified) international destinations, or the provider may verify compliance to export regulations on behalf of registered merchants. The provider may assume the role of Principal Party in Interest for registered merchants or the merchants may retain this role.

Abstract: A fulfillment services provider may offer export services to merchants, including generation of required export documentation; calculation, collection, and remittance of customs duties; and transportation via an international carrier. Such export services may be offered through a registration service, and may be integrated with other fulfillment services provided to registered merchants (e.g., domestic order fulfillment and/or warehousing of inventory), or may be offered to merchants that do not receive other fulfillment services from the provider. Export services may be provided to merchants who certify that all registered or specified items may be legally exported to all (or specified) international destinations, or the provider may verify compliance to export regulations on behalf of registered merchants. The provider may assume the role of Principal Party in Interest for registered merchants or the merchants may retain this role.

Abstract: An antenna element for use in the nose section of a small missile is disclosed. The antenna element includes a ground plane and a pair of end fed radiating elements, the free ends thereof being fastened to ground plane. With such arrangement the antenna element fits compactly within the nose section and the ground plane provides a heat sink and structural support for the radiating elements.