Kuang Chen (http://www.eecs.berkeley.edu/~kuangc/) is a PhD student at Berkeley. After finishing his Bachelor's at UW-CSE, he has been focusing on data management systems that help low-resource organizations and people in the developing world. He works on improving local practices in data collection and quality and his USHER (paper,slides) system is a great example of the practical tools he builds. Kuang explains in the video below that “Data quality is a critical problem in modern databases. Data entry forms present the first and arguably best opportunity for detecting and mitigating errors, but there has been little research into automatic methods for improving data quality at entry time. In this paper, we propose USHER, an end-to-end system for form design, entry, and data quality assurance. Using previous form submissions, USHER learns a probabilistic model over the questions of the form. USHER then applies this model at every step of the data entry process to improve data quality. Before entry, it induces a form layout that captures the most important data values of a form instance as quickly as possible. During entry, it dynamically adapts the form to the values being entered, and enables real-time feedback to guide the data enterer toward their intended values. After entry, it re-asks questions that it deems likely to have been entered incorrectly. We evaluate all three components of USHER using two real-world data sets. Our results demonstrate that each component has the potential to improve data quality considerably, at a reduced cost when compared to current practice.” Video: http://www.youtube.com/watch?v=jdl5ECWtHcU Paper: http://www.eecs.berkeley.edu/~kuangc/publications/icde10-usher.pdf Slides: http://www.eecs.berkeley.edu/~kuangc/publications/icde10-usher.slides.pdf