human: Given a node-centered hypergraph: <hypergraph>, where nodes represent authors and hyperedges represent groups of authors who co-authored the same paper.

Details of the hypergraph:
Center node: "Rapid-prototyping of hardware and software in a unified framework"
  Abstract: The authors present a CAD (computer-aided design) framework for design of application-specific systems that use a mix of dedicated hardware modules and software processes running on programmable hardware modules. Many application-specific systems are actually being designed using this framework. Some are using the entire top-down mixed hardware-software architecture template based methodology, whereas others are fruitfully employing just the board-level module generators and libraries for specific custom boards. The main contribution of this work is the handling of board-level module generation, system software generation, and hardware-software integration in a unified framework. The application area addressed is that of systems that interact with their environment in real-time; a robot control system and a speech recognition system are examples of such systems. >

Connected through hyperedge HE-1 (induced by source paper "Using VHDL for high-level, mixed-mode system simulation"):
  with members:
    (none)

Question: Please tell me which research area the center author belongs to. The 4 classes are: Computer science, Mathematics, Engineering, Economics, Psychology, Business. Directly output the class name.

gpt: Computer science