Abstract: The present disclosure relates to recombinant DNA molecules and engineered proteins useful for conferring tolerance to ?-triketone herbicides such as mesotrione. The present disclosure also provides herbicide tolerant transgenic plants, plant parts, cells and seeds comprising the recombinant DNA molecules, and methods of using the same.

Abstract: Systems and method for providing application layer fault tolerance in a VoIP architecture is shown and described. The method includes associating a virtual network address with one of a first communication device and second communication device, receiving a message from a network element, detecting a fault on an active one of the communication devices, and associating the virtual address with the other of the communication devices. Each of the first and second communication devices is coupled to a VoIP network. The virtual network address is associated with the active one of the communication devices. The detection of the fault occurs when the active communication device is at a first execution point of an application executing on the active communication device. When the virtual address is associated with the other communication device, the other of communication devices continues to provide the service from the first execution point.

Abstract: Systems and methods for messaging handling among redundant application servers are described. A method of providing application synchronization among a plurality of servers in an VoIP network environment includes pausing execution of an application on a standby server when the standby server encounters a checkpoint in the application and receiving a first message indicating that an active server reached the same checkpoint in a copy of the application executing on the active server. The method also includes transmitting, from the standby server, a second message to the active server indicating that the standby server received the first message and resuming execution of the application on the standby server.

Abstract: Systems and methods for providing redundant application servers are described. A method of providing application server redundancy in a VoIP environment includes, receiving, at a standby server, application layer and signaling layer state information related to an active server and configuring the standby server to have substantially the same application layer and signaling layer state as the active server. The method also includes receiving, at the standby server, a copy of a message received by the active server and processing, by the standby server, the copy of the message to maintain synchronization between the state of the active server and the standby server.