ENGINEERING SCIENCE AND MECHANICS / 155 occurring in aeronautical, mechanical, and structural engineering. Response of such systems to impulse, shock, and random excitations, emphasizing computer techniques. ESM 634-INTRODUCTION TO ELASTICITY. 3 credits Prerequisite: ESM 303 or ESM 305. Theory of stress and strain for con- tinuous media. Stress and strain relations of elasticity. Strain energy density. Compatibility equations. Elementary three-dimensional problems. Plane elasticity in Cartesian and polar coordinates. Torsion of noncircular bars. ESM 635-INTRODUCTION TO PLATES AND SHELLS. 3 credits Prerequisite: ESM 303 or ESM 305. Small-deflection theory of plates. Boundary conditions. Rectangular and circular plates. Energy methods. Large deflections of plates. Orthogonal curvilinear coordinates. Surfaces of shells. Membrane theory of shells. Bending of shells of revolution. ESM 636-NUMERICAL METHODS OF ENGINEERING ANALYSIS 1. 3 credits Prerequisite: ISE 351. Variational principles. Minimum potential energy. Re- laxation, Rayleigh-Ritz and Galerkin methods. Modern computer techniques. ESM 637-NUMERICAL METHODS OF ENGINEERING ANALYSIS 2. 3 credits Prerequisite: ESM 636. Trefftz's procedure. Prager's function space concept. Perturbation and collocation procedures. Use of computer. ESM 642-MICROMECHANICS 1. 3 credits Identical with MTL 642. Prerequisite: MTL 641 or ESM 601. Continuum theory of dislocation. Stress fields, displacement fields, and energies of simple shapes and finite arrays of dislocations. Continuous distributions of dislocations and their relationship to mechanical properties. Relation of the state of dislocation to the geometry of deformed lattices. ESM 644-ADVANCED DYNAMICS 1. 3 credits Prerequisite: ESM 536. Dynamics of particles and rigid bodies applied to advanced engineering problems utilizing variational and transformation principles. ESM 645-ADVANCED DYNAMICS 2. 3 credits Prerequisite: ESM 644. Theory and application of Lagrangian equations to engineering problems. Hamilton-Jacobi theory and its applications. ESM 646-STABILITY OF DYNAMICAL SYSTEMS. 3 credits Prerequisite: ESM 520 or ESM 536. Basic concepts of stability, stability and asymptotic behavior of motion. Forced oscillations of systems with nonlinear characteristics. Floquet theory, Mathieu and Hill equations, Liapunov's direct method, criterion of Routh-Hurwitz, Popov and others. ESM 650-ADVANCED EXPERIMENTAL STRESS ANALYSIS 1. 3 credits Prerequisite: ESM 549. General optical theory of propagation of light in anisotropic media. Three-dimensional photoelasticity; theory and applications. ESM 651-ADVANCED EXPERIMENTAL STRESS ANALYSIS 2. 3 credits Prerequisite: ESM 650. Moir6 method, two- and three-dimensional applications. Mathematical theory of similitude and model analysis. ESM 652-THEORY OF ELASTICITY 1. 3 credits Prerequisite: ESM 601. Linear theory of homogeneous, isotropic, elastic media. Analysis of stress and strain. Nonlinear considerations. ESM 653-THEORY OF ELASTICITY 2. 3 credits Prerequisite: ESM 652. Tensor development of stress-strain laws and basic equations of elasticity. Two-dimensional problems. Energy and variational methods. ESM 654-THEORY OF ELASTICITY 3. 3 credits Prerequisite: ESM 653. Two-dimensional problems and their solutions by com-