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: "participant a new concept for optimally assisting the elder people"
  Abstract: Elder people are becoming a predominant aspect of our societies. As such, solutions both efficacious and cost-effective need to be sought. The approach pursued so far to solve this problem used to increase the number of people working in the health sector, e.g. doctors, nurses, etc. This increases the costs, which is becoming a big burden for countries. In this paper we propose a new concept in the health management of elder people, which we name as "participant". We propose the "participant" concept to encourage elder people to participate in those group activities that they are able to. Their roles in these activities are not passively requesting help, but actively participating to some healthcare processes. Characteristics of the participant approach are that medical resources are efficiently spared with this model, and the social network of the elder people is kept. A "virtual community" for mutual assistance is set up in this paper, and the simulations demonstrate that the "participant" model could fully utilize the community resources. Furthermore, the psychological health of the elder people will be improved.

Connected through hyperedge HE-1 (induced by source paper "fractal social organization as a foundation to pervasive social computing services"):
  with members:
    - "fractally organized connectionist networks conjectures and preliminary results"
    - "on the requirements of new software development"
    - "on environments as systemic exoskeletons crosscutting optimizers and antifragility enablers"
    - "models and representations for fractal social organizations"
    - "on resilient behaviors in computational systems and environments"
    - "how resilient are our societies analyses models and preliminary results"
    - "service oriented communities visions and contributions towards social organizations"
    - "mutualistic relationships in service oriented communities and fractal social organizations"

Connected through hyperedge HE-2 (induced by source paper "on environments as systemic exoskeletons crosscutting optimizers and antifragility enablers"):
  with members:
    - "fractally organized connectionist networks conjectures and preliminary results"
    - "tapping into the wells of social energy a case study based on falls identification"
    - "on the quality of emergence in complex collective systems"
    - "on resilient behaviors in computational systems and environments"
    - "a framework for trustworthiness assessment based on fidelity in cyber and physical domains"
    - "how resilient are our societies analyses models and preliminary results"
    - "service oriented communities visions and contributions towards social organizations"
    - "on the behavioral interpretation of system environment fit and auto resilience"

Connected through hyperedge HE-3 (induced by source paper "promises and challenges of ambient assisted living systems"):
  with members:
    - "a design tool to reason about ambient assisted living systems"
    - "a service oriented infrastructure approach for mutual assistance communities"

Connected through hyperedge HE-4 (induced by source paper "service oriented communities visions and contributions towards social organizations"):
  with members:
    - "a design tool to reason about ambient assisted living systems"
    - "on the requirements of new software development"
    - "promises and challenges of ambient assisted living systems"
    - "a service oriented infrastructure approach for mutual assistance communities"
    - "the missing ones key ingredients towards effective ambient assisted living systems"

Connected through hyperedge HE-5 (induced by source paper "antifragility elasticity resilience machine learning models and algorithms for open system fidelity"):
  with members:
    - "the missing ones key ingredients towards effective ambient assisted living systems"
    - "on the constituent attributes of software and organizational resilience"
    - "application layer fault tolerance protocols"

Connected through hyperedge HE-6 (induced by source paper "reflections on organization emergence and control in sociotechnical systems"):
  with members:
    - "service oriented communities visions and contributions towards social organizations"
    - "behavior organization substance three gestalts of general systems theory"
    - "the missing ones key ingredients towards effective ambient assisted living systems"

Connected through hyperedge HE-7 (induced by source paper "mutualistic relationships in service oriented communities and fractal social organizations"):
  with members:
    - "service oriented communities visions and contributions towards social organizations"
    - "quality indicators for collective systems resilience"
    - "the missing ones key ingredients towards effective ambient assisted living systems"

Connected through hyperedge HE-8 (induced by source paper "the missing ones key ingredients towards effective ambient assisted living systems"):
  with members:
    - "a design tool to reason about ambient assisted living systems"
    - "promises and challenges of ambient assisted living systems"
    - "a service oriented infrastructure approach for mutual assistance communities"

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.CY(Computers and Society)