… worked as a research assistant at Yale School of Public Health for a year on a low-cost air quality sensor network, and my main duty was data analysis and visualization. After that, I … worked as a research assistant at Yale School of Public Health for a year on a low-cost air quality sensor network, and my main duty was data analysis and visualization. After that, I … worked as a research assistant at Yale School of Public Health for a year on a low-cost air quality sensor network, and my main duty was data analysis and visualization. After that, I …