Radical transformations in the turn of the nineties initiated a lot of changes in political, social and economic systems. These changes were expected and desired but on the other hand they become impediment in normal ...

Solid Oxide Fuel Cells (SOFCs) are promising devices for the production of electricity and heat in combined systems (CHP – cogeneration heat and power), both mobile and stationary. These cells require high operating ...

The article presents theoretical facts of thermoelectric phenomena (i.e. Joule effect, Seebeck effect, Thomson effect and Peltier effect). Lead-free $Na_{1-x}Li_xNbO_3$ ceramics (x = 0 – 0,06) were synthesized by a ...

The comparison of the calculated dynamic responses of typical, high-rise, prefabricated residential buildings subjected to some measured paraseismic-type excitations (mine-induced tremors) modelled in two ways, is presented ...

Efficiency of a firearm depends on both ammunition and a type of a gun. Bullets differ in calibre and framework. The core of a bullet destructive impact is the way of energy transfers and its distribution in the material. ...

Modern facilities that control car security systems are becoming more and more common. Their possession increases the safety of both driver and passengers as well as other road users. However, one should remembered that ...

In the first part of the «Science of Logic» Hegel defines the category of being. He implicitly introduces first the notion of a line, and then a basal graph, still unknown in his time. The author of the article describes ...

The article analyses the two-position regulation system. The simulation results of a simple two-position system without correction and correction of the controller are presented. The influence of some coefficients is ...

Photography is one of the most interesting field of creative actions and passions. We can find many interesting applications of this profession in various technical laboratories, its begin in the form of traditional ...