human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "hybrid spectral efficient cellular network deployment to reduce rf pollution"):
  Abstract: the mobile telecommunication systems are growing tremendously all over the world, the numbers of handheld and base stations are also rapidly growing and it became very popular to see these base stations distributed everywhere in the neighborhood and on roof tops which has caused a considerable amount of panic to the public in Palestine concerning wither the radiated electromagnetic fields from these base stations may cause any health effect or hazard. Recently UP High Court in India ordered for removal of BTS towers from residential area, it has created panic among cellular communication network designers too. Hybrid cellular networks could be a solution for the above problem. This paper deals with hybrid cellular networks with the help of multi-layer overlaid hierarchical structure (macro / micro / pico / femto cells). Macrocell for area coverage, micro for pedestrian and a slow moving traffic while pico for indoor use and femto for individual high capacity users. Hybrid cellular network could be the answer of the problem of energy conservation and enhancement of spectral density as well as reduction of RF pollution. Proposed network will optimize all available resources in existing cellular network through application of remote technologies.

Includes members:
  Member "r f pollution reduction in cellular communication":
    also connected through other hyperedges:
      (none)
  Member "an intelligent approach for dense urban area in existing 2g 2 5g":
    also connected through other hyperedges:
      (none)
  Member "hierarchical cellular structures in high capacity cellular communication systems":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "blip jit and footloose on the edge")
  Member "proposed cellular network for indian conditions for enhancement of spectral density and reduction of power consumption rf pollution":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "r f pollution reduction in cellular communication")
  Member "survey of latest wireless cellular technologies for enhancement of spectral density at reduced cost":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "r f pollution reduction in cellular communication")

Question: Please tell me which class the source paper 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)