The equipment described in the paper consists of a portable optoelectronic structure meant to determine in situ the element chemical composition, metallic material of a welding seam, basic metallic material welded, metallic walls of plasma or gas cutting joint, material welded or cut by laser, some charges of melted steel as well as some other high energy processes accompanied by emission of light electromagnetic radiation, using exactly the high energy radiation in the spectrometer analysis of these heat sources. The device structure and its technical feasibilities are described, too

Screening systems that provides shielding of workspaces and living quarters of electromagnetic radiation in microwave and radio waves field from the environment are electrical structures presented in the paper. The energy of these radiations is consumed by means of passive resonant oscillating electric circuits, each provided at different wavelength and covering a wide range of frequency and by short-circuit copper or aluminum turns. Oscillating circuits and metal cage coils are invisibly embedded in various building or ornamental materials of spaces and uses the radiant energy from the outside by the resonant oscillation, turning it in heat and protecting living spaces effect of high frequency electromagnetic radiations.