Fig. 6.

Association rule mining (ARM)-based research category trends from 2001 to 2020.

Although the types of research categories have diversified, as explained in Fig. 3, several categories, such as Forestry, Oceanography, Plant Sciences, and Marine & Freshwater Biology, have received decreasing interest (Fig. 6b). Categories such as Energy & Fuels, Education Scientific Disciplines, Health Care Sciences & Services, Health Policy & Services, and Transportation have emerged as significant resilience-related societies since 2010 (Fig. 6c). Interest in Green & Sustainable Science & Technology was low prior to 2010 but has been ranked as an important category every year since 2011. As ARM-based research topics are linked to the corresponding research categories, we can understand in-depth resilience-related multidisciplinary research trends in terms of both topics and research categories over 20 years based on bibliographic data.