• Security Informatics, Security Big Data; Smart and Connected Health, Health Analytics; Data, Text, Web Mining.
• Digital Library, Intelligent Information Retrieval, Automatic Categorization and Classification, Machine Learning for IR, Large-Scale Information Analysis and Visualization.
• Internet Resource Discovery, Digital Libraries, IR for Large-Scale Scientific and Business Databases, Customized IR, Multilingual IR.
• Knowledge-Based Systems Design, Knowledge Discovery in Databases, Hypertext Systems, Machine Learning, Neural Networks Computing, Genetic Algorithms, Simulated Annealing.
• Cognitive Modeling, Human-Computer Interactions, IR Behaviors, Human Problem-Solving Process.
