Perhaps his most notable contribution has been to show that if long-run balance of payments equilibrium is a requirement for a country, its growth of national income can be approximated by the ratio of the growth of exports to the income elasticity of demand for imports (Thirlwall's Law).
When the vibrator tunes to the resonant frequency of the system, the reactive load impedance cancels out to zero by virtue of the inductance reactance (mass of the system) equalling the compliance or stiffness reactance (elasticity of the tubular).
In the paper, three example systems are shown to exhibit such a force electrostatic system of molten salt, surface tension and rubber elasticity.
Common applications of force spectroscopy are measurements of polymer elasticity, especially biopolymers such as RNA and DNA.
This was followed in 1676 by Robert Hooke's first statement of Hooke's Law, providing a scientific understanding of elasticity of materials and their behaviour under load.
The BB condition has guided mathematicians and engineers to develop state-of-the-art formulations for many technologically important problems like Darcy flow, Stokes flow, incompressible Navier-Stokes, nearly incompressible elasticity.
He was co-author of two classic books in this field:"Theory of Elasticity," with Timoshenko, 1951; and "Elasticity and Plasticity," with P. G.
1963-1965, 1967-1973 – Associate Professor of the Theory of Elasticity and Plasticity Department YSU
•
1973 – Professor of the Theory of Elasticity and Plasticity, YSU