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: "happy software developers solve problems better psychological measurements in empirical software engineering"
  Abstract: For more than thirty years, it has been claimed that a way to improve software developers’ productivity and software quality is to focus on people and to provide incentives to make developers satisfied and happy. This claim has rarely been verified in software engineering research, which faces an additional challenge in comparison to more traditional engineering fields: software development is an intellectual activity and is dominated by often-neglected human factors (called human aspects in software engineering research). Among the many skills required for software development, developers must possess high analytical problem-solving skills and creativity for the software construction process. According to psychology research, affective states—emotions and moods—deeply influence the cognitive processing abilities and performance of workers, including creativity and analytical problem solving. Nonetheless, little research has investigated the correlation between the affective states, creativity, and analytical problem-solving performance of programmers. This article echoes the call to employ psychological measurements in software engineering research. We report a study with 42 participants to investigate the relationship between the affective states, creativity, and analytical problem-solving skills of software developers. The results offer support for the claim that happy developers are indeed better problem solvers in terms of their analytical abilities. The following contributions are made by this study: (1) providing a better understanding of the impact of affective states on the creativity and analytical problem-solving capacities of developers, (2) introducing and validating psychological measurements, theories, and concepts of affective states, creativity, and analytical-problem-solving skills in empirical software engineering, and (3) raising the need for studying the human factors of software engineering by employing a multidisciplinary viewpoint.

Connected through hyperedge HE-1 (induced by source paper "measurement of interpersonal trust in global software development slr protocol"):
  with members:
    - "software developers moods emotions and performance"

Connected through hyperedge HE-2 (induced by source paper "happiness and the productivity of software engineers"):
  with members:
    - "what happens when software developers are un happy"
    - "on the unhappiness of software developers"
    - "how do you feel developer an explanatory theory of the impact of affects on programming performance"
    - "do feelings matter on the correlation of affects and the self assessed productivity in software engineering"
    - "software developers moods emotions and performance"

Connected through hyperedge HE-3 (induced by source paper "what happens when software developers are un happy"):
  with members:
    - "unhappy developers bad for themselves bad for process and bad for software product"
    - "consequences of unhappiness while developing software"
    - "on the unhappiness of software developers"
    - "mining valence arousal and dominance possibilities for detecting burnout and productivity"
    - "understanding the affect of developers theoretical background and guidelines for psychoempirical software engineering"
    - "how do you feel developer an explanatory theory of the impact of affects on programming performance"
    - "the affect of software developers common misconceptions and measurements"
    - "do feelings matter on the correlation of affects and the self assessed productivity in software engineering"

Connected through hyperedge HE-4 (induced by source paper "analysing developers affectiveness through markov chain models"):
  with members:
    - "easier contagion and weaker ties make anger spread faster than joy in social media"
    - "mining valence arousal and dominance possibilities for detecting burnout and productivity"
    - "understanding the affect of developers theoretical background and guidelines for psychoempirical software engineering"
    - "the role of emotions in contributors activity a case study on the gentoo community"
    - "a computational approach to politeness with application to social factors"

Connected through hyperedge HE-5 (induced by source paper "toward a better understanding of how to develop software under stress drafting the lines for future research"):
  with members:
    - "are happy developers more productive"

Connected through hyperedge HE-6 (induced by source paper "consequences of unhappiness while developing software"):
  with members:
    - "unhappy developers bad for themselves bad for process and bad for software product"
    - "mining valence arousal and dominance possibilities for detecting burnout and productivity"
    - "understanding the affect of developers theoretical background and guidelines for psychoempirical software engineering"
    - "how do you feel developer an explanatory theory of the impact of affects on programming performance"
    - "the affect of software developers common misconceptions and measurements"
    - "do feelings matter on the correlation of affects and the self assessed productivity in software engineering"
    - "software developers moods emotions and performance"

Connected through hyperedge HE-7 (induced by source paper "on the unhappiness of software developers"):
  with members:
    - "consequences of unhappiness while developing software"
    - "mining valence arousal and dominance possibilities for detecting burnout and productivity"
    - "understanding the affect of developers theoretical background and guidelines for psychoempirical software engineering"
    - "how do you feel developer an explanatory theory of the impact of affects on programming performance"
    - "the affect of software developers common misconceptions and measurements"
    - "do feelings matter on the correlation of affects and the self assessed productivity in software engineering"
    - "software developers moods emotions and performance"

Connected through hyperedge HE-8 (induced by source paper "unhappy developers bad for themselves bad for process and bad for software product"):
  with members:
    - "understanding the affect of developers theoretical background and guidelines for psychoempirical software engineering"
    - "how do you feel developer an explanatory theory of the impact of affects on programming performance"
    - "do feelings matter on the correlation of affects and the self assessed productivity in software engineering"
    - "software developers moods emotions and performance"

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.SE(Software Engineering)