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: "mobile cloud computing a review on smartphone augmentation approaches"
  Abstract: Smartphones have recently gained significant popularity in heavy mobile processing while users are increasing their expectations toward rich computing experience. However, resource limitations and current mobile computing advancements hinder this vision. Therefore, resource-intensive application execution remains a challenging task in mobile computing that necessitates device augmentation. In this article, smartphone augmentation approaches are reviewed and classified in two main groups, namely hardware and software. Generating high-end hardware is a subset of hardware augmentation approaches, whereas conserving local resource and reducing resource requirements approaches are grouped under software augmentation methods. Our study advocates that consreving smartphones' native resources, which is mainly done via task offloading, is more appropriate for already-developed applications than new ones because of costly re-development process. Moreover, cloud computing is one of the major cornerstone technologies in augmenting computing capabilities of smartphones. Sample execution model for intensive mobile applications is presented and taxonomy of augmentation approaches is devised. For better comprehension, the results of this study are summarized in a table.

Connected through hyperedge HE-1 (induced by source paper "cloud based augmentation for mobile devices motivation taxonomies and open challenges"):
  with members:
    - "sami service based arbitrated multi tier infrastructure for mobile cloud computing"
    - "momcc market oriented architecture for mobile cloud computing based on service oriented architecture"
    - "cloudmonitor profiling power usage"
    - "tripod of requirements in horizontal heterogeneous mobile cloud computing"
    - "a survey of green networking research"
    - "the anatomy of the grid enabling scalable virtual organizations"

Connected through hyperedge HE-2 (induced by source paper "sami service based arbitrated multi tier infrastructure for mobile cloud computing"):
  with members:
    - "tripod of requirements in horizontal heterogeneous mobile cloud computing"

Connected through hyperedge HE-3 (induced by source paper "momcc market oriented architecture for mobile cloud computing based on service oriented architecture"):
  with members:
    - "tripod of requirements in horizontal heterogeneous mobile cloud computing"

Connected through hyperedge HE-4 (induced by source paper "virtual machine migration a resource intensive outsourcing mechanism for mobile cloud computing"):
  with members:
    - "tripod of requirements in horizontal heterogeneous mobile cloud computing"

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.DC(Distributed, Parallel, and Cluster Computing)