A city’s public spaces ought to meet a number of requirements to serve their main purpose, that is to foster public life. They need, for instance, to answer people’s needs, fulfil certain social functions, and let people use their basic rights, among them the most important right of access. In Katowice, one of the most prominent examples of the regeneration of public spaces is now the Culture Zone. The aim of this paper is to discuss the development of social functions in the area mentioned, a fine example of the post-industrial heritage of Upper Silesia. Applying some of the qualities of public space identified in the theories adopted, the paper discusses how the Culture Zone [in Polish: Strefa Kultury] fulfils the above-mentioned demands and requirements. Is it accessible? Does it meet the need for comfort? Does it function as a leisure space? By referring to analyses and opinions presented in the literature and comparing them with the results of the author’s own empirical research, this article discusses the importance, opportunities, and shortcomings of the Culture Zone as a public space.
This paper deals with the new conception of the highly efficient generating sets dedicated to application in small hydropower stations. The main features of a new generating set solution are a variable speed operation of water turbine according to actual hydrological conditions in the hydropower station and no need for gearbox between the turbine and the generator. The main elements of new generating set solution are the high efficiency low speed permanent magnet synchronous generator and dedicated frequency converter with proper control algorithm implemented. The benefits resulting from the installation of newly developed generating sets instead of traditional constant speed solutions will be the significantly higher efficiency of power generation in the new or modernized hydropower stations and the significantly better utilization of hydropower resources available in a country.Index Terms permanent magnet generator, small hydro power station, hydro generating set, efficiency improvement, low rotational speed generator, renewable energy, synchronous generator.
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