SUPER-ROUGH DYNAMICS ON TUMOR-GROWTH

The growth of a cultivated typical brain tumor is studied in this work . The tumor is analyzed both dynamically and morphologically. We have measured its fractal dimension to be d(f) = 1.21 +/- 0.05. From its dy namical behavior we determine the scaling critical exponents of this c ircular symmetry system which are compatible with the linear molecular beam epitaxy universality class. A very important feature of tumor pr ofiles is that they are super-rough, which constitutes the first (1 1)-dimensional experiment in literature with super-roughness. The resu lts obtained from the dynamics study make manifest two very surprising features of tumor growth: Its dynamics is mainly due to contour cells and the tendency of an interface cell to duplicate is a function of t he local curvature. [S0031-9007(98)07545-0].