[1] George Mason Univ, Coll Educ & Human Dev, Math Educ, Fairfax, VA 22030 USA
[2] George Mason Univ, Sch Engn, Bioengn, Fairfax, VA 22030 USA
[3] George Mason Univ, Coll Sci, Math Sci, Fairfax, VA 22030 USA
[4] Pohang Univ Sci & Technol POSTECH Pohang, Creat IT Engn CiTE, Pohang, South Korea
[5] Red Venture, Cambridge, MA USA
[6] Pohang Univ Sci & Technol, Creat IT Engn, Pohang, South Korea