26,446 research outputs found
Macro-routing: a new hierarchical routing protocol
In a continually evolving Internet, tools such as quality of service routing must be used in order to accommodate user demands. QoS routing raises scalability issues within very large networks, which can he avoided by using hierarchical routing strategies. However, such strategies can lead to inaccurate path selection due to the aggregation process. To avoid such problems, we propose a hierarchical routing protocol, called macro-routing, which can distribute the route computation more efficiently throughout the network using mobile agents. It processes more detailed information than conventional hierarchical routing protocols, so is more likely to find the best path between source and destination. Also, by using mobile agents, more than one available path can be found. This provides a fast recovery mechanism, where no protocol restart is needed in a failure situation
Spin Electronics and Spin Computation
We review several proposed spintronic devices that can provide new
functionality or improve available functions of electronic devices. In
particular, we discuss a high mobility field effect spin transistor, an
all-metal spin transistor, and our recent proposal of an all-semiconductor spin
transistor and a spin battery. We also address some key issues in
spin-polarized transport, which are relevant to the feasibility and operation
of hybrid semiconductor devices. Finally, we discuss a more radical aspect of
spintronic research--the spin-based quantum computation and quantum information
processing.Comment: 17 pages, 3 figure
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