We consider the problem of collectively delivering a package from specified source to designated target location in graph, using multiple mobile agents. Each agent starts some vertex graph; it can move along edges graph and pick up drop another during course its movement. However, each has limited energy budget allowing traverse path bounded length B; thus, agents need collaborate destination. ...

A wireless sensor network (WSN) consists of a huge number of sensor nodes that are inadequate in energy, storage and processing power. One of the major tasks of the sensor nodes is the collection of data and forwarding the gathered data to the Base Station (BS). Hence, the network lifetime becomes the major criteria for effective design of the data gathering schemes in WSN. In this paper, an En...