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A new visualization tool, called "Visual Concept Explorer (VCE)", was developed to visualize concept relationships in bio-medical literatura VCE integrates Pathfinder Network Scaling and Kohonen Self-organizing Feature Map Algorithm for visual mapping. As a case study, VCE was applied to visualize a chromatin protein-protein interaction (PPI) network The mapping results demonstrated that VCE could explore the semantic structure and latent domain knowledge hidden in protein-protein interactiondoi:10.1109/grc.2005.1547307 dblp:conf/grc/ZhuLHS05 fatcat:j5s2yqorxrd7hl4antpnfs3niy