![Joanna Chan, Data Scientist, National Technical and Information Service (NTIS). Joanna Chan, Data Scientist, National Technical and Information Service (NTIS).](../sites/default/files/styles/full_width_image_700x400max/public/media/images/2018/joannachan.jpg%3Fitok=kHBrNgec)
Joanna Chan, Data Scientist, National Technical and Information Service (NTIS).
An official website of the United States government
Official websites use .gov
A .gov
website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites..