Dr Alaei is known for his research work on data mining (sentiment analysis) of Big Data, document image analysis and recognition, human visual system modelling, and biometrics. He has published more than 60 high-quality research papers in reputed international journals and peer-reviewed conferences. He has worked on several projects, such as Big Data Analysis for Opinion Mining, Document Image Retrieval, and Writer Detection, to understand how cutting-edge technologies can be used to understand different communities' opinions on tourism and environmental issues, facilitate fast document retrieval, handwriting forensics, etc. https://researchportal.scu.edu.au/esploro/profile/ali_alaei/overview