Cloud IoT data processing (2017.01 – 2017.12) Develop of IoT data processing and analysis system based on Lambda architecture Figure 1. IoT data processing system Development of a distributed query processing system for heterogeneous NoSQL databases (2017.06 – 2019.02) Conduct a taxi trip data analysis study based on NoSQL, which is a subject of continuous research in the previous research Figure 2. Profitable areas query processing using NoSQL databases