In recent years, changes have been made in the structure of primary energy use in the European

Union In addition, a reduction in the use of primary energy has also been observed. According to

the forecasts of the International Energy Agency, the European energy market will be subject to

further changes in the perspective of 2040. These may include the reduction of the energy consumption

and the change in the structure of the energy balance as a result pro-ecological activities.

Natural gas will be the only fossil energy carrier whose role in covering the energy demand will not

change. Along with the changes taking place in the European energy market, global changes can

also be observed. The EU Member States will continue to strive to diversify natural gas supplies.

One of the main elements of diversification of natural gas supplies is the use of LNG regasification

terminals. The reasons for that include the increasing production of natural gas, particularly in the

case of unconventional deposits, the ongoing development of liquefaction terminals, and, as a consequence,

an increase in the LNG supply in the global market. The article presents the utilization of

regasification terminals in the EU Member States and plans for the development of LNG terminals.

Europe has the opportunity to import natural gas through LNG terminals. However, until now,

these have been used to a limited extent. This may indicate that in addition to diversification tasks,

terminals can act as a safeguard against interruptions in gas supplies.

The Finns built a goal-oriented policy of lifelong guidance, which promotes not only the climate of constant learning, but also the development of knowledge and skills. The Finnish success is related to the changes in the contemporary world. It relies on the perfect recognition of skills and competences, which are needed in society of the future due to the different working conditions, which students and employees of XXI century have to face.

Complex circuit of milling-classify systems are used in different branches of industry, because the required particle size distribution of product can seldom be reached in a single-stage grinding on the same device. The multistage processes of comminution and classification make possible suitable selection of parameters process for variables graining of fed material, mainly through sectioning of devices or change of their size and the types. Grinding material usually contains size fractions, which meet the requirements relating finished product. Then profitable is preliminary distributing material on a few size fractions, so to deal out with them demanded fraction of product, whereas remaining to direct alone or together with fed material to the same or different device. If the number of mills and classifiers in a circuit is large enough, building the model of particle size distribution transformation becomes rather complicated even for the circuit of a given structure. The situation becomes much more complicated, if we want to compare characteristics of all possible circuits, that can be constructed from these mills and classifiers, because the number of possible circuits increases greatly with the increase of number of devices being in the milling-classify system. The method creating matrix model for transformation of particle size distribution in a circuit of arbitrary structure of milling-classify system is presented in the article. The proposed model contains the mass population balance of particle equation, in which are block matrices: the matrix of circuit M, the matrix of inputs F and the matrix of feed F0. The matrix M contains blocks with the transition matrix P, the classification matrix C, the identity matrix I and the zero matrix 0 or elements describing the transformation of particle size distribution in the circuit. The matrix F is the block column matrix, which elements describing all particle size distributions at inputs to the circuit elements. The matrix F0 is the block column matrix, which elements describing particle size distributions in all feeds to the circuit. In paper was discussed this model in details, showed algorithm and three examples formatrix construction for the closed circuit ofmilling-classify systems. In conclusion was affirmed, that presented model makes possible to forecasting particle size distribution of grinding product, which leaving chosen the unit of system. The matrix model can be applied to improving modeling of mineral processing in the different grinding devices.

The semantics of temporal distributiveness comes into the fore in two cases: a) either when a habitual activity is correlated with the recurrent periods of time; b) or when the recurrent periods of time are accompanied by an activity. The present paper is yet another contribution to a series of papers exploring Polish temporal constructions with distributive meaning. It focuses on constructions with the pronoun każdy, such as (spotykamy się) w każdą sobotę (każdą sobotę).

Reliable evaluation of stress-strain characteristics can be done only in the laboratory where boundary conditions with respect to stress and strain can be controlled. The most popular laboratory equipment is a triaxial apparatus. Unfortunately, standard version of triaxial apparatus can reliable measure strain not smaller than 0.1 %. Such accuracy does not allow to determine stiffness referred to strain range most often mobilized in situ i.e. 10-3 ÷ 10-1%, in which stiffness distribution is highly nonlinear. In order to overcome this problem fundamental modifications of standard triaxial apparatus should be done. The first one concerns construction of the cell. The second refers to method of measurement of vertical and horizontal deformation of a specimen. The paper compares three versions of triaxial equipment i.e. standard cell, the modified one and the cell with system of internal measurement of deformation. The comparison was made with respect to capability of stiffness measurement in strain range relevant for typical geotechnical applications. Examples of some test results are given, which are to illustrate an universal potential of the laboratory triaxial apparatus with proximity transducers capable to trace stress-strain response of soil in a reliable way.