On Approximate Methods of Calculating the Excitation Cross Section of Atoms and Ions.- Effective Excitation and Ionization Cross Sections of Ions.- Unseparated Variables in the Problem of the Excitation of an Atom by Electron Impact.- The Role of Intermediate States in the Excitation of Atoms by Electron Impact.- The Quasi-classical Method in the Theory of Collisions of Atoms with Heavy Particles and Electrons.- Calculation of Effective Scattering Cross Sections Using Atomic Functions Which Consider the Interaction of Configurations.- Charge Exchange at Intermediate Collision Energies.- Broadening of Spectral Lines of Nonhydrogenic Ions.- On the Problem of the Interaction of Excited Atoms of Alkali Metals with Inert Gases.- Investigation of Transitions between Excited States of the Neon Atom during Collisions of Electrons.- Experimental Determination of the Matrix Elements of the Dipole Moment of an Electronic Transition in the System of Swan Bands of the C2 Molecule.