DB Tsai, a.k.a. Dong-Bang Tsai, is a Data Scientist. He also got passionate about entrepreneurship, and he co-founded a social fashion site, keekaa.com. His current focus is on Big Data, Data Mining, and Machine Learning. He uses Hadoop, Spark, Mahout, and several Machine Learning algorithms for building powerful, scalable, and robust cloud-driven applications. His favorite programming languages are Java, Scala, and Python. DB is a Ph.D. student in Applied Physics at Stanford University (currently leave of absence). He holds a Master’s degree in Electrical Engineering from Stanford University, as well as a Master's degree in Physics from National Taiwan University. He received a Bachelor's degree in Physics from National Cheng Kung University.