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Nike Air Max Womens Pink the linear theory Kalker 1967 3
In this paper the theory of rolling contact is surveyed after a development of over 60 years. Six theories are significant at present: (1) the two-dimensional theory of Carter (1926); (2) the linear theory (Kalker 1967); (3) the complete theory (CONTACT, Kalker 1983–1990); (4) the British Rail Table Book (ca. 1980); (5) the theory of Shen, Hedrick and Elkins (1984); (6) the simplified theory (Kalker, 1973–1989). Their operation, scope and limitations will be discussed, and it will be indicated Nike Air Max Womens Pink to which problem(s) of wheel-rail technology each of these theories is best suited. Ohmic contacts based on the use of InN have been Nike Air Max Womens Pink developed which show low contact resistance and good adhesion even after annealing at temperatures up to 600°C. Samples with thin InN layers actually showed improvement in contact resistance with annealing in this range. InN layer thicknesses ≤1000 Å also showed good adhesion over this range, while thicker samples exhibited delamination at temperatures as low as 400°C. Annealing at 700°C produced severe degradation of the contact resistance due to decomposition of the InN and diffusion of the In into the WSix.