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: "A wireless sensor network For structural monitoring"
  Abstract: Structural monitoring---the collection and analysis of structural response to ambient or forced excitation--is an important application of networked embedded sensing with significant commercial potential. The first generation of sensor networks for structural monitoring are likely to be data acquisition systems that collect data at a single node for centralized processing. In this paper, we discuss the design and evaluation of a wireless sensor network system (called Wisden for structural data acquisition. Wisden incorporates two novel mechanisms, reliable data transport using a hybrid of end-to-end and hop-by-hop recovery, and low-overhead data time-stamping that does not require global clock synchronization. We also study the applicability of wavelet-based compression techniques to overcome the bandwidth limitations imposed by low-power wireless radios. We describe our implementation of these mechanisms on the Mica-2 motes and evaluate the performance of our implementation. We also report experiences from deploying Wisden on a large structure.

Connected through hyperedge HE-1 (induced by source paper "Low-Complexity Cooperative Coding for Sensor Networks using Rateless and LDGM Codes"):
  with members:
    - "Stimulating Cooperative Diversity in Wireless Ad Hoc Networks through Pricing"

Connected through hyperedge HE-2 (induced by source paper "People-centric urban sensing"):
  with members:
    - "BikeNet: A mobile sensing system for cyclist experience mapping"
    - "Sensing meets mobile social networks: the design, implementation and evaluation of the CenceMe application"

Connected through hyperedge HE-3 (induced by source paper "Fine-grained network time synchronization using reference broadcasts"):
  with members:
    - "Stitching: pen gestures that span multiple displays"
    - "Sensor networks for medical care"
    - "Locating tiny sensors in time and space: a case study"
    - "TOSSIM: accurate and scalable simulation of entire TinyOS applications"
    - "PSKA: Usable and Secure Key Agreement Scheme for Body Area Networks"
    - "RMAC: A Routing-Enhanced Duty-Cycle MAC Protocol for Wireless Sensor Networks"

Connected through hyperedge HE-4 (induced by source paper "Underground structure monitoring with wireless sensor networks"):
  with members:
    - "Multiple task scheduling for low-duty-cycled wireless sensor networks"

Connected through hyperedge HE-5 (induced by source paper "Rethinking Data Management for Storage-centric Sensor Networks."):
  with members:
    (none)

Connected through hyperedge HE-6 (induced by source paper "Full length article: Channel model and analysis for wireless underground sensor networks in soil medium"):
  with members:
    - "BorderSense: Border patrol through advanced wireless sensor networks"

Connected through hyperedge HE-7 (induced by source paper "Interference-aware fair rate control in wireless sensor networks"):
  with members:
    - "Mechanisms for centralized flow rate control in 802.11-based wireless mesh networks"

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