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: "Depth-Based Real-Time Hand Tracking with Occlusion Handling Using Kalman Filter and DAM-Shift"
  Abstract: In this paper, we propose real-time hand tracking with a depth camera by using a Kalman Filter and an improved DAM-Shift (Depth-based adaptive mean shift) algorithm for occlusion handling. DAM-Shift is a useful algorithm for hand tracking, but difficult to track when occlusion occurs. To detect the hand region, we use a classifier that combines a boosting and a cascade structure. To verify occlusion, we predict in real time the center position of the hand region using Kalman Filter and calculate the major axis using the central moment of the preceding depth image. Using these factors, we measure real-time hand thickness through a projection and the threshold value of the thickness using a 2nd linear model. If the hand region is partially occluded, we cut the useless region. Experimental results show that the proposed approach outperforms the existing method.

Connected through hyperedge HE-1 (induced by source paper "Efficient Model-based 3D Tracking of Hand Articulations using Kinect"):
  with members:
    - "Real-time human pose recognition in parts from single depth images"
    - "3D Tracking of Multiple Objects with Identical Appearance Using RGB-D Input"
    - "Characterizing Predicate Arity and Spatial Structure for Inductive Learning of Game Rules"
    - "Multi-scale Deep Learning for Gesture Detection and Localization"

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