This research was performed to test the effectiveness of the microclimate body cooling system which belongs to the group of active systems with liquid-cooled technology. The liquid cooling vest efficiency was observed concerning the physiological fitness of the standard protective set used in specific environmental conditions which imply increased thermal strain of the test subjects. Experimental results from the research are based on the examinations carried out in a thermo-physiological laboratory. Ten healthy male volunteers ? test subjects aged (23.4 ? 2.4 years, weight 74 ? 7 kg, and height 184 ? 9 cm) were exposed to thermal strain testing (40 ?C temperature, 40 ?3 % relative humidity, without wind) and simultaneously to physical effort caused by walking on the treadmill at a speed of 5 km/h, during 45 minutes. Tests were performed in two variants: without any cooling system and with the KewlFlow Circulatory Cooling Vest with Cooler Kit. Throughout heat exposure, the subject?s body core temperature (tympanic temperature ? Tty), mean skin temperature, Tsk, and heart rate were measured. Furthermore, sweat rate was calculated in order to determine all changes in the water and electrolyte status. Experimental results confirm that the results of this study have recognized the benefits of a liquid-cooled vest in lowering the thermal strain.

Excessive everyday use of mobile phones and wireless communication systems has produced life in electromagnetic fields and growing public concern about possible effects on human health. All these devices operate close to the head and body and electromagnetic waves leave part of their energy in the matter through which they pass. There has been a lot of research on the toxic effects of amalgam fillings that are believed to be the main source of human total mercury body burden but there is not sufficient knowledge about the influence of electromagnetic radiation from mobile phone on amalgam filling and how that affects human health. Electrical engineering has the task to produce devices that improve the quality of human life without any negative effects, and to ensure the safety of new products and technologies. Using electromagnetic simulation to obtain electromagnetic quantities in the head and teeth and linking these results to physical and physical-chemical processes in the matter has led to advances in clarifying these issues. In general, the conclusion is that the use of mobile phones can lead to increased absorption of energy and other electromagnetic quantities in teeth and filling of teeth and cause increased release of mercury and toxicological effects to health associated with the intake of mercury in the human organism.

This paper discusses the reactions of formation and decomposition of nitrogen oxides during fossil fuel combustion and in the atmosphere. Information about the chemical processes of pollutant formation and decomposition is the basis for the development of theoretical models of pollutant emissions. The information also provides a clearer picture about the primary factors influencing emissions. Nitrogen oxides are pollutants that damage human health, living and nonliving nature, and material property.