The materials based on barium titanate have nonlinear dependence of polarization on the intensity of the electrical field. The properties of those materials are used when different automation elements such as primary converters, phase regulators for low and high frequencies, sensors, modulators etc. are derived. Ceramics based on barium titanate (BaTiO3) alloyed with H3BO3 and Bi2O3 have been derived and researched. The influence of the temperature of sintering on the values of the dielectric permittivity on the structural properties has been determined. The influence of the quantity of the added material on the temperature dependencies and the non-linear properties of the ceramics have been analyzed. Both legation additives decrease the sintering temperature. However, the values of the dielectric permittivity decrease while the non-linear properties of the doped barium titanate (BaTiO3) improve. The coefficient of non-linearity reaches its maximum for the H3BO3 composites, synthesized at temperature of 1100 oC.

Modern athletics is developing with incredible dynamics. In sports science and practice there are a number of proven methodological approaches that are related to the diagnosis of the training effects. One of the tasks of functional diagnostics in sports is researching and tracing the body changes related to energy supply in a certain training activity. The aim of the research is to increase the effectiveness of the mid-distance training exercise through the creation of criteria for assessing the adaptation effects of the workloads. The subject of the study is the adaptation changes in the level of HR, VO 2 max and La in the conditions of the training activity. The research was done among 27 male middle distance competitors. The test was performed on the athletics track with the use of a special K4 set which recorded the pulse frequency and oxygen consumption dynamics. The concentration of lactate in capillary blood was recorded immediately after the run. The results show that the speed of recovery of the pulse frequency in the phases of the short ened rest is the correct adaptation marker for the determination of the individual tolerance in running loads and the level of athletes' training. The recommended quantitative values of the respiratory and metabolic adaptation markers and their associated running speed are as follows: aerobic threshold-2 mmol/l at a running speed of less than 4.10 m/sec. and a heart rate up to 157 HR.; anaerobic threshold-4 mmol/l at a running speed between 4.10 and 5.13 m/s and a pulse limit of 157-178 HR-an effective aerobic zone (economic zone); over 178 HR and the running speed over 5.13 m/s.

The purpose of this study is to increase the effectiveness of the training process by showing of optimal basic physical parameters in athletes in middle and long distance running. 73 runners of middle and long distances were researched, which was examined this marks: high, weight, body fats, muscle mass, VO2max, maximum speed. The researched anthropometric measurements were part of functional exam in competitors. To increase the efficiency of the training process in competitors in middle and long distance we have developed optimal value of basic marks. It clearly shows theoretically optimal ranges of each mark. Therefore, when a significant disparity between different marks could be purposefully affect on some anthropometric parameters such as to reduce body fat and increase muscle mass. Periodic monitoring of the levels of anthropometric marks has important information for the ongoing monitoring of the effects of the applied training approaches. We concluded that the influence of anthropometric marks on sporting achievement in middle and long distances running is higher in men than in women. The values of the researched indicators provide opportunities for individual assessment of the relevant levels on each mark as itself and in the context of basic correlations with the others.