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: "Pre-Touch Sensing for Mobile Interaction"
  Abstract: Touchscreens continue to advance including progress towards sensing fingers proximal to the display. We explore this emerging  pre-touch modality  via a self-capacitance touchscreen that can sense multiple fingers above a mobile device, as well as grip around the screen's edges. This capability opens up many possibilities for mobile interaction. For example, using pre-touch in an  anticipatory  role affords an "ad-lib interface" that fades in a different UI--appropriate to the context--as the user approaches one-handed with a thumb, two-handed with an index finger, or even with a pinch or two thumbs. Or we can interpret pre-touch in a retroactive manner that leverages the approach trajectory to discern whether the user made contact with a ballistic vs. a finely-targeted motion. Pre-touch also enables  hybrid touch + hover gestures , such as selecting an icon with the thumb while bringing a second finger into range to invoke a context menu at a convenient location. Collectively these techniques illustrate how pre-touch sensing offers an intriguing new back-channel for mobile interaction.

Connected through hyperedge HE-1 (induced by source paper "Gaze and Touch Interaction on Tablets"):
  with members:
    - "Design considerations for combining augmented reality with intelligent tutors"

Connected through hyperedge HE-2 (induced by source paper "Occlusion-aware interfaces"):
  with members:
    - "Interactive environment-aware display bubbles"

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