Stress relieving in the welded joints occurs when loaded of the platform lift. Critical welds of profile from steel S235JRH and of stiffener from steel S355J0 are examined in terms of flexibility, strength and safety using strength analysis method. Under different welding conditions and parameters are performed the testing welds by method MAG. Macroscopic and microscopic inspection are conducted as well as tension test. Weld created in active gas 82 %Ar + 18 %CO2, by dip transfer with low values of welding current 96 A and voltage 20,2 V became as the top evaluated sample. This weld is recommended to use in practice.

Heating and cooling along with the indoor air quality is now discussed topic not only in the family houses. Goes hand in hand with reducing the energy consumption of buildings. This fact is edited by various laws or Regulations, no matter we discuss new buildings requirements, or for example energy label on older constructions.

The diploma thesis is focused on the combustion of the low calorific gaseous fuels. The first part is devoted to the characterization and usage of low calorific fuels. Then combustion theory focused mainly on emissions and thermodynamics. Next characterization of burners and their modifications for low calorific value fuels is described. Safe storage and handling of chosen gases is also included in the last chapter of the theoretical part. Practical part includes the description of the laboratory experiment, which was a part of this thesis. It consists of the experiment description, experimental plan, calculation and evaluation of emissions, high and low heating value, density, flame temperatures and heat flux. Laboratory experiment was carried out with different fuels. Low calorific fuels were simulated by gradual increase of the concentration of inert gasses in the natural gas. Increased concentration of inert gasses had positive effect on the emissions. Measurement of the flame temperatures confirmed that the decrease of emissions corresponds to the inert gas addition to the noble fuel. Heat flux and thermal efficiency of the combustion was almost identical for each configuration.

This diploma thesis deals with the history and the development of the gas industry in Czechoslovakia, namely the construction of the transit gas pipeline and development of the gas transit system. One of the part of this thesis is a history of the coal gas and the reasons for its gradual replacement by a natural gas. The metodology of this thesis is based mainly on interviews based on the method of oral history, on archival records, and contemporary literature. Primarily it is focused on oral history fieldwork, particularly on the personal experiences of narrators who were direct participants in the construction. This work is also focused on the circumstances of the negotiations of the construction of a transit gas pipeline and further expansion of the transit system from the seventies to the nineties of the 20th century. Keywords Transit pipeline, natural gas, gas industry, economy, energetics, coal gas, normalization

This thesis is based on the historical base, a deep look at the Norwegian referendum results and public opinion development. We concentrated on three research questions and on three related hypotheses studying Norway history, Norwegian politics and the possibilities of Norwegian integration to the European Union. We studied intrastate and also international aspects of this integration process. The Nordic cooperation is very important for this research. This Nordic cooperation provided a platform for alternative economic cooperation and this cooperation is also a special first stage on the way to the EU. We fulfilled the thesis goals, we answered the research questions and we verified all three hypotheses. In conclusion, we think that Norwegian admission to the EU is unreal nowadays because there are non-sufficient economic and non- economic reasons and stimuli for that. Norwegian political parties are not interested in this topic because this topic is very risky. Moreover, Norwegian public opinion is against the full membership in the EU.

The master thesis analyzes the natural gas policy of Hungary in light of the duality in its international context. Hungarian decisions regarding energy policy are directly influenced by the EU through the country's membership and subscription to the Union's multilateral framework, but are simultaneously affected by the bilateral relationship with the key supplier of natural gas, Russia. This duality is analyzed as embodied in two natural gas pipelines projects, Nabucco and South Steam, both including Hungary as a transit country, but serving different interests. The study finds that the multilaterally defined community interests - although of increasing importance - do not prevail over bilaterally articulated interests with Russia in the field of energy.

The goal of this thesis is to examine the term of public interest within the framework of the 'shale gas' issue in the Czech Republic. The theoretical section is divided into two basic parts. The first part defines the term public interest from the point of view of political science, sociology and economy. The second one describes the issue of shale gas extraction in global context. The examination is focused on the context of administrative procedures defining the prospecting exploration area of unconventional hydrocarbon resources in the Trutnov region and around the Berounka River The intention of private companies to extract shale gas in the Czech Republic caused a big discussion. In its core there is the dispute between the economic development of the country connected with energy security on one hand and the environment protection on the other. Within this debate the term public interest appears in many different contexts. The way it is used by the people involved and their interests are described through interviews with them and analysis of the gained material.

The Thesis aims to analyze the possible shale gas development in the EU in context with raising problem of energy security. Based on the experience of shale revolution in the USA and econometric modelling using the method of Ordinary Least Squares with Fixed Effects to test the dependence of price on shale gas production, the transfer of US model to the EU is discussed. The results show that shale production affects the price negatively and that US model is successful due to multiple reasons, primarily presence of experienced companies, geological structure and strong regulation rules. The Thesis shows the unsuitability of the US model for the EU market. After the first enthusiasm for shale plays research in late 2000s the multiple barriers for drilling have risen up; the most significant are the environmental worries; both on governmental and public levels. US companies have lost interest in the EU and moved to other parts of the world. The shale gas development is not able to affect the energy security of the EU on European, international level.

The goal of this master thesis is to analyse the potential of LNG for the Central European region with the emphasis on the strategic role of LNG imports in strengthening the energy security of the region and its possible role in replacing the traditional fuels in the transport sector of the Visegrad Group countries. The increasing availability of LNG, together with the predictions of its rapidly growing global supply in the following years, offers a window of opportunity for the Central European states. Particularly when it comes to their energy security, as the growing access to LNG supplies translates into a growing competition for the existing pipeline supplies from Russia. Furthermore, the thesis also focuses on the potential of LNG as an alternative fuel in the inland waterway and heavy duty road transportation of the Visegrad Group countries and the steps that these countries take to integrate LNG fuel in their transport sector.

Main purpose of this thesis is to find out how self sufficient concerning the energy raw materials are countries within Visegrad group. Further purpose of my thesis is to analyse total primary energy supply, the structure of energy supply in countries of Visegrad group and its developments in last 4 decades. Furher I want to reveal how the structure of total primary energy supply and structure of electricity generation reflect the disponibility of raw materials in these countries and transformation of economics in the nineties. A sub-objective of my work will examine how countries of the Visegrad Four use the potential of renewable energy sources and how they support it.