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: "Interactive environment-aware display bubbles"
  Abstract: We present a novel display metaphor which extends traditional tabletop projections in collaborative environments by introducing freeform, environment-aware display representations and a matching set of interaction schemes. For that purpose, we map personalized widgets or ordinary computer applications that have been designed for a conventional, rectangular layout into space-efficient bubbles whose warping is performed with a potential-based physics approach. With a set of interaction operators based on laser pointer tracking, these freeform displays can be transformed and elastically deformed using focus and context visualization techniques. We also provide operations for intuitive instantiation of bubbles, cloning, cut & pasting, deletion and grouping in an interactive way, and we allow for user-drawn annotations and text entry using a projected keyboard. Additionally, an optional environment-aware adaptivity of the displays is achieved by imperceptible, realtime scanning of the projection geometry. Subsequently, collision-responses of the bubbles with non-optimal surface parts are computed in a rigid body simulation. The extraction of the projection surface properties runs concurrently with the main application of the system. Our approach is entirely based on off the-shelf, low-cost hardware including DLP-projectors and FireWire cameras.

Connected through hyperedge HE-1 (induced by source paper "Lumisight Table: an interactive view-dependent tabletop display"):
  with members:
    - "How people use orientation on tables: comprehension, coordination and communication"

Connected through hyperedge HE-2 (induced by source paper "Occlusion-aware interfaces"):
  with members:
    - "Pre-Touch Sensing for Mobile Interaction"

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