human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "a six degree of freedom haptic device based on the orthoglide and a hybrid agile eye"
  Abstract: This paper is devoted to the kinematic design of a new six degree-of-freedom haptic device using two parallel mechanisms. The first one, called orthoglide, provides the translation motions and the second one, called agile eye, produces the rotational motions. These two motions are decoupled to simplify the direct and inverse kinematics, as it is needed for real-time control. To reduce the inertial load, the motors are fixed on the base and a transmission with two universal joints is used to transmit the rotational motions from the base to the end-effector. Two alternative wrists are proposed (i), the agile eye with three degrees of freedom or (ii) a hybrid wrist made by the assembly of a two-dof agile eye with a rotary motor. The last one is optimized to increase its stiffness and to decrease the number of moving parts.

Connected through hyperedge HE-1 (induced by source paper "kinematic analysis and trajectory planning of the orthoglide 5 axis"):
  with members:
    - "kinematic and dynamic analyses of the orthoglide 5 axis"
    - "stiffness analysis of 3 d o f overconstrained translational parallel manipulators"
    - "kinematics and workspace analysis of a three axis parallel manipulator the orthoglide"
    - "kinematic analysis of a new parallel machine tool the orthoglide"
    - "design strategies for the geometric synthesis of orthoglide type mechanisms"

Connected through hyperedge HE-2 (induced by source paper "kinematic and dynamic analysis of the 2 dof spherical wrist of orthoglide 5 axis"):
  with members:
    - "stiffness analysis of 3 d o f overconstrained translational parallel manipulators"
    - "architecture optimization of a 3 dof translational parallel mechanism for machining applications the orthoglide"
    - "design strategies for the geometric synthesis of orthoglide type mechanisms"

Connected through hyperedge HE-3 (induced by source paper "kinematic and dynamic analyses of the orthoglide 5 axis"):
  with members:
    - "stiffness analysis of 3 d o f overconstrained translational parallel manipulators"
    - "kinematics and workspace analysis of a three axis parallel manipulator the orthoglide"
    - "design strategies for the geometric synthesis of orthoglide type mechanisms"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.RO(Robotics)