Qualifying types represent a new approach to modifying the behaviour of instances of other types in a general way, in the form of components which can be designed and implemented without a prior knowledge of the types to be modified or their implementations. This paper illustrates the idea by showing how they can be used to program various standard synchronisation problems, including mutual exc...

Industry cluster and supply chain are in focus of every countries which rely on knowledge-based economy. Both focus on improving the competitiveness of firm in the industry in the different aspect. This paper tries to illustrate how the industry cluster can increase the supply chain performance. Then, the proposed methodology concentrates on the collaboration and knowledge exchange in supply ch...

Russia, with total production of 581 bcm (billion of cubic meters), is the world’s leading producer of gas. Despite that, however, the problems currently faced by its gas industry are many and significant. On one hand, questions are still being asked on the capacity of Gazprom, the national company, to face up to the considerable financial needs to renew the major gas deposits developed under t...

introduction earth's atmosphere plays an important role in preventing the temperature decrease. one of the principal factors of environmental pollution and the main source of earth's climate and biodiversity changes is greenhouse gas emissions from various sources, particularly agricultural sector. agriculture sector is considered as a major source of greenhouse gas sequestration, including me...

Ecological aspects of coal combustion utilization of CO2 from flue gas Slovakia belongs to the group of twenty worst polluters throughout the world, releasing 10 12 tons of carbon dioxide per capita, whereas the worldwide average value is about 5 tons. It is known that the big electric and thermal power stations produce only 25 % of the overall production of carbon dioxide in Slovakia, whereas ...

The authors explore Massively Multiplayer Online Games (MMOG) business models in order to characterize two main problems: big initial investment and continuous expenditures. The four main actors of a MMOG environment – game producer, Game, Players and Business Model – are analysed resorting to Actor Network Theory in order to understand their alignment in Business Models and how they can influe...