Vascular resistance recent results showing the sheath flow surrounding the plug flow in a vessel, the sheath flow size is not neglectible in the real blood flow velocity profile in a vessel. The velocity profile is directly linked to flow resistance in a vessel. The viscosity variations, according to Thurston, are also balanced by the sheath flow size around the plug flow. The secondary regulators of vascular resistance, after vessel radius, is the sheath flow size and its viscosity. Thurston, as well, shows that the resistance R is constant, where, for a defined vessel radius, the value η(δ)/δ is constant in the
The Resistance to Theory about language." The resistance to theory is therefore, according to de Man, a resistance to reading: "Nothing can overcome the resistance to theory since theory 'is' itself this resistance." De Man concludes however by stating that "literary theory is not in danger of going under; it cannot help but flourish, and the more it is resisted, the more it flourishes, since the language it speaks is the language of self resistance." (p. 365) The Resistance to Theory "The Resistance to Theory" is an essay by Paul de Man (1919–83), a renowned literary critic and theorist belonging to the Yale School