Yuxian Eugene Liang is a researcher, author, web developer, and business developer. He enjoys solving difficult problems creatively in the form of implementing web applications using Python/Django/Tornado, and JavaScript/Jquery/Node.js. He also enjoys doing research related to the areas of social network analysis, social computing, recommendation algorithms, link analysis, data visualization, data mining, information retrieval, business intelligence, and intelligent user interfaces. He previously authored JavaScript Testing Beginner's Guide. Find him at http://www.liangeugene.com. Support for this book can also be found at http://wordpressphonegap.liangeugene.com.