urn:nasa:pds:context:instrument:ttu-ag_eng.darwish_wt 1.0 1.11.0.0 Product_Context 2019-02-13 1.0 Initial creation of the context product. urn:nasa:pds:context:facility:laboratory.ttu-ag_eng instrument_to_facility Darwish, M., (1991) Threshold Friction Velocity: Moisture and Particle Size Effects, MS Thesis, Dept. Agricultural Engineering, Texas Tech University. Darwish Wind Tunnel at Texas Tech University, Agricultural Engineering Department Atmospheric Sciences Open circulation wind tunnel, suction type with a length of 4.87 m, 1.0 m height, and 0.5 m width. The tunnel was constructed for the M.S. Thesis of Mukaddes Darwish by James M. Gregory around 1991 at Texas Tech University as part of the Agricultural Engineering Department (which no longer exists). Likely places to contact: Texas Tech University Whitacre College of Engineering, Lubbock, TX http://www.depts.ttu.edu/coe/ or National Wind Institute, Texas Tech University, Lubbock, TX http://www.depts.ttu.edu/nwi/