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: "Pervasive computing: vision and challenges"
  Abstract: This article discusses the challenges in computer systems research posed by the emerging field of pervasive computing. It first examines the relationship of this new field to its predecessors: distributed systems and mobile computing. It then identifies four new research thrusts: effective use of smart spaces, invisibility, localized scalability, and masking uneven conditioning. Next, it sketches a couple of hypothetical pervasive computing scenarios, and uses them to identify key capabilities missing from today's systems. The article closes with a discussion of the research necessary to develop these capabilities.

Connected through hyperedge HE-1 (induced by source paper "Adapting to network and client variability via on-demand dynamic distillation"):
  with members:
    - "Potential benefits of delta encoding and data compression for HTTP"
    - "Security on the move: indirect authentication using Kerberos"

Connected through hyperedge HE-2 (induced by source paper "Using architecture models for runtime adaptability"):
  with members:
    - "Self-adaptive software: Landscape and research challenges"

Connected through hyperedge HE-3 (induced by source paper "Infrastructures and Their Discontents: Implications for Ubicomp"):
  with members:
    - "From today's augmented houses to tomorrow's smart homes: new directions for home automation research"

Connected through hyperedge HE-4 (induced by source paper "BOSS: building operating system services"):
  with members:
    (none)

Connected through hyperedge HE-5 (induced by source paper "A Review on Distributed Application Processing Frameworks in Smart Mobile Devices for Mobile Cloud Computing"):
  with members:
    - "A lightweight secure cyber foraging infrastructure for resource-constrained devices"
    - "An Improved Approach of Decoupling in Mobile Cloud Computing"

Connected through hyperedge HE-6 (induced by source paper "A lightweight secure cyber foraging infrastructure for resource-constrained devices"):
  with members:
    - "A Review on Distributed Application Processing Frameworks in Smart Mobile Devices for Mobile Cloud Computing"
    - "An Extendable Simulation Framework for Modeling Application Processing Potentials of Smart Mobile Devices for Mobile Cloud Computing"

Connected through hyperedge HE-7 (induced by source paper "Using Activity Theory to Model Context Awareness: a Qualitative Case Study"):
  with members:
    - "Macro process of knowledge management for continuous innovation"

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