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: "viewpoints in co design a field study in concurrent engineering"
  Abstract: We present a field study aimed at analysing the use of viewpoints in co-design meetings. A viewpoint is a representation characterised by a certain combination of constraints. Three types of viewpoints are distinguished: prescribed viewpoint, discipline-specific viewpoint and integrated viewpoint. The contribution of our work consists in characterising the viewpoints of various stakeholders involved in co-design ("design office" disciplines, and production and maintenance disciplines), the dynamics of viewpoints confrontation and the cooperative modes that enable these different viewpoints to be integrated.

Connected through hyperedge HE-1 (induced by source paper "aides en ligne a l utilisation de logiciels grand public probl emes sp ecifiques de conception et solutions potentielles"):
  with members:
    - "the lumiere project bayesian user modeling for inferring the goals and needs of software users"
    - "do oral messages help visual search"

Connected through hyperedge HE-2 (induced by source paper "a methodological framework for socio cognitive analyses of collaborative design of open source software"):
  with members:
    - "changing our view on design evaluation meetings methodology a study of software technical review meetings"
    - "cognitive effort in collective software design methodological perspectives in cognitive ergonomics"

Connected through hyperedge HE-3 (induced by source paper "collaborative design managing task interdependencies and multiple perspectives"):
  with members:
    - "a methodological framework for socio cognitive analyses of collaborative design of open source software"
    - "negotiation in collaborative assessment of design solutions an empirical study on a concurrent engineering process"
    - "changing our view on design evaluation meetings methodology a study of software technical review meetings"
    - "quantitative measurements of the influence of participant roles during peer review meetings"
    - "analysing viewpoints in design through the argumentation process"

Connected through hyperedge HE-4 (induced by source paper "multimodality and parallelism in design interaction co designers alignment and coalitions"):
  with members:
    - "conception individuelle et collective approche de l ergonomie cognitive individual and collective design the cognitive ergonomics approach"
    - "designing as construction of representations a dynamic viewpoint in cognitive design research"
    - "changing our view on design evaluation meetings methodology a study of software technical review meetings"
    - "quantitative measurements of the influence of participant roles during peer review meetings"

Connected through hyperedge HE-5 (induced by source paper "users participation to the design process in an open source software online community"):
  with members:
    - "a methodological framework for socio cognitive analyses of collaborative design of open source software"
    - "changing our view on design evaluation meetings methodology a study of software technical review meetings"

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.HC(Human-Computer Interaction)