I am a Professor of Informatics in the College of Computing and Informatics at Drexel University, Philadelphia, USA. I am the founding editor and the Editor in Chief of Information Visualization, published quarterly by SAGE. I am also the founding editor and the Chief Field Editor of Frontiers in Scholarly Metrics and Analytics, an open-access journal. I am the author of several books, including Representing Scientific Knowledge: The Role of Uncertainty (Springer, 2017), The Fitness of Information: Quantitative Assessments of Critical Evidence (Wiley, 2014), Mapping Scientific Frontiers: The Quest for Knowledge Visualization (2nd Ed.) (Springer, 2013), and Information Visualization: Beyond the Horizon (Springer, 2004, 2006). I have been developing and maintaining CiteSpace - a computational tool for visualizing patterns and trends in scientific literature.