Page 15 - Special Topic Session (STS) - Volume 2

STS451 Yuji M.
2.2. MM-Index
Mizukami et al. (2017) [1] aimed at objectively defining the
specialization of the researcher, and defined the derivation method of the
specialization based on co-author analysis.

2.2.1. Visualization of researchers’ specialization fields and
applied fields
Traditionally, the specialization fields chosen by researchers are
based on each individual’s offer; therefore, can be said to be a
subjective definition. Also, because it is a subjective definition, in one
case, the achievement in the specialized field was not accompanied,
and the significance of the special field of researchers was not clear
[2]. In response to this problem, Mizukami et al. [2] aimed at
objectively defining the expertise of researchers, and they defined a
method for deriving fields of specialization based on co-authored
analysis.
Figure 1 (a) shows an example of the specialization field and the
application fields of researchers. Researcher A’s published papers
include two articles in the mathematics field (Field 12), one article in
the clinical medicine field (Field 4), one article in the economics and
business fields (Field 6), and one article in the comprehensive field
(Field 15). The field of specialization of researcher A is the
mathematical field, and its concentration rate is assumed to be 40%.
If the degree of concentration rate is high, the researcher is thought
to concentrate substantially on research in that specialized field.
However, if the degree of concentration rate is low, the researcher
seems to have applied the research results of the specialization field
to other fields (i.e., application fields).

Figure 1 Specialized field and application fields of the
researcher

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