1. Executive Director, Biomass Controls, 105 Hood St., P.O. Box 3650, Durham, NC 27701. ORCID: .
2. Lecturer, Cranfield Water Science Institute, Cranfield Univ., Cranfield MK43 0AL, UK (corresponding author). ORCID: .
3. Research Fellow, Cranfield Water Science Institute, Cranfield Univ., Cranfield MK43 0AL, UK.
4. Research Professor, Dept. of Electrical and Computer Engineering, Duke Univ., Durham, NC 27708.