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In this study, the authors have investigated warehouse processes to identify critical ones that are wasteful. The aim of this research study was to improve the efficiency of warehouse processes by reducing travel time and cost in replenishment and order picking. To achieve this objective, the authors have proposed a mathematical model and discrete event simulation study. For the simulation model, the Dijkstra algorithm has been selected to schedule forklifts driving and picking vehicles routes in internal transport. According to the extensive simulation analysis approximately 67 % of waste could be reduced in warehouses. Of course, this number depends significantly on a warehouse layout, operations and material handling equipment used in warehouses.

Currently, a lot of emphasis is placed of the ability of a person to successfully communicate in any sphere of activity, which along with upbringing and education is among the factors that determine a person’s culture. In the context of rapid scientific and technological progress, it is vital to constantly exchange relevant infor- mation. The effectiveness of this process relies not only on the proficient knowledge of the subject and the ability to make grammatically correct sentences, but to a large extent on the level of competence in scientific language. The present article attempts to consider the interaction of discourse and vocabulary, different types of cognitive phenomena responsible for the use of a language in real time and related to the language as a means of storing and organising information. Analysing and classifying some key elements of a scientific discourse lexicon contributes to the development of certain provisions of lexicology, functional stylistics, cognitive linguistics and terminology. The results of the analysis may be advantageous both to linguistics and teaching the language for specific purposes.