Bibliometric Analysis Asia-Pacific Research Area ... - JuSER

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within South-East Asia, we can conclude that there is a high degree of dependency on a
possible research area. The cooperation figures of developed countries, such as Japan and
Australia, also experience a significant increase. As a result, we can speak of increasing
cooperation in South-East Asia.
Relationship between publication output and cooperation of South-East Asian countries 2007
100000
100%
75000
75%
number of publications
50000
33.45%
43.71%
50%
share of co-publications
25000
22.24%
16.95%
22.89%
24.25%
25%
7.86% 7.05%
10.39%
8.21%
10.25%
0
0%
publications
share of co-publications
Figure 113: Relationship between publication output and cooperations in South-East Asia 2007
The network diagrams in Figures 114 to 117 clearly illustrate increasing networking between the
countries studied for the period 1998 – 2007. Figures 114 and 115 show the development of the
co-published journal articles between 1998 and 2007 in the form of network diagrams. The copublications
are indicated by the lines joining the dots representing the countries. The thicker
the line, the greater the number of co-publications. The joint co-publications are relativised with
respect to the output of the country. Salton’s measure of international collaboration strength (S)
was applied. This measures the strength of networking activities between two countries x and y,
and relativises this strength to the size of the output of the two countries. This value is
calculated by dividing the number of joint co-publications of two countries (C xy ) by the root of the
product of the total publications of country x (C x ) and country y(C y ).
S
xy
=
C
C
x
xy
⋅C
y
The diagrams in Figures 114 and 115 show that networking among the countries has increased
perceptibly between 1998 and 2007. Since the co-publications have been relativised with
respect to the total output of a country, the extreme increase in joint publications cannot be
explained by the general rise in scientific output within these ten years. On the contrary,
cooperation in the form of scientific networking within the research area studied has increased
at a disproportionate rate and the network has become denser.
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