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Table 4 Top representative concepts of two groups of articles categorized as nucl-th

From: Ground truth? Concept-based communities versus the external classification of physics manuscripts

%

Concept (cluster no. 1)

%

Concept (cluster no. 3)

43

Hadronization

55

Isotope

39

Isospin

53

Hamiltonian

37

Pion

39

Hartree-Fock

33

Degree of freedom

36

Quadrupole

32

Heavy ion collision

34

Isospin

31

Quark

31

Nuclear matter

29

Chirality

30

Degree of freedom

29

Hamiltonian

28

Mean field

29

Nuclear matter

26

Harmonic oscillator

26

Coupling constant

25

Spin orbit

  1. The left side of the table represents the group of articles that fell into hep dominated cluster (no. 1) in idf partition. The right side - the other group: the nucl-th articles that fell into cond-mat dominated cluster (no. 3). For each group, the numbers next to the concepts give the percentage of articles in which the concept has been identified. The table allows us to make a suggestion that the two groups of articles significantly differ by the methods used to investigate nuclear matter.