This map shows the geographic impact of Heejun Lim's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Heejun Lim with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Heejun Lim more than expected).
This network shows the impact of papers produced by Heejun Lim. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Heejun Lim. The network helps show where Heejun Lim may publish in the future.
Co-authorship network of co-authors of Heejun Lim
This figure shows the co-authorship network connecting the top 25 collaborators of Heejun Lim.
A scholar is included among the top collaborators of Heejun Lim based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with Heejun Lim. Heejun Lim is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Noh, Taehee, Heejun Lim, Jihyun Yoon, & Ji Young Kim. (2010). Pedagogical Content Knowledge Factors Considered by Pre-service Elementary Teachers in Planning and Implementing of Science Teaching Demonstration. Journal of Korean Elementary Science Education. 29(3). 350–363.1 indexed citations
8.
Kim, Jeong-Seon, et al.. (2009). The Effect of Problem-Based Learning on Creative Problem-Solving Skills and Achievement in Elementary Science. Journal of Korean Elementary Science Education. 28(4). 382–389.1 indexed citations
9.
Lim, Heejun, et al.. (2008). Middle and High School Students' Awareness on Scientific or Technological Workplaces and Relevant Professions. Journal of The Korean Association For Science Education. 28(8). 890–900.1 indexed citations
10.
Lim, Heejun, et al.. (2007). Developing an Innovative Framework of Grade 3～4 Science Textbooks. Journal of Korean Elementary Science Education. 26(5). 580–595.1 indexed citations
11.
Lim, Heejun, et al.. (2007). A Comparison Study on Illustrations of Elementary Science Textbooks in Korea and USA. Journal of Korean Elementary Science Education. 26(4). 459–467.1 indexed citations
12.
Lim, Heejun. (2007). Comparison of General Teaching Efficacy and Science Teaching Efficacy of Preservice Elementary Teachers. Journal of Korean Elementary Science Education. 26(1). 131–139.
13.
Lim, Heejun & Taehee Noh. (2001). Verbal Interactions in Heterogeneous Small-group Cooperative Learning. Journal of The Korean Association For Science Education. 21(4). 668–676.4 indexed citations
14.
Lim, Heejun, et al.. (2001). The relationships of verbal behaviors with learning variables in cooperative learning environments, and middle school students' perceptions of cooperative learning. Journal of The Korean Association For Science Education. 21(3). 487–496.3 indexed citations
15.
Lim, Heejun, et al.. (1999). The Relationships between Verbal Behaviors and Academic Achievement in Cooperative Learning. Journal of The Korean Association For Science Education. 19(3). 367–376.1 indexed citations
16.
Noh, Taehee, et al.. (1998). The Effects of Grouping in Cooperative Learning Strategy. Journal of The Korean Association For Science Education. 18(1). 61–70.2 indexed citations
17.
Noh, Taehee, et al.. (1998). The Instructional Influences of Metacognitive Learning Strategies in Elementary School Science Course. Journal of The Korean Association For Science Education. 18(2). 173–182.2 indexed citations
18.
Noh, Taehee, et al.. (1998). The Use of Cognitive and Metacognitive Strategies of Elementary School Students in the Learning and Testing Situations. Journal of The Korean Association For Science Education. 18(3). 327–336.3 indexed citations
19.
Lim, Heejun, et al.. (1998). The Instructional Effects of Student-Centered Cooperative Learning Strategies in Elementary School Science Course. Journal of The Korean Association For Science Education. 18(2). 201–208.1 indexed citations
20.
Noh, Taehee, et al.. (1997). The Instructional Influences of Cooperative Learning Strategies: Applying the STAD Model to High School Chemistry Course. Journal of The Korean Association For Science Education. 17(3). 251–260.1 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.