Paweł Trębacz

In the currently functioning planning system there is a lack of studies enabling to determine the main spatial structure of larger urban units. As a result of the analysis of the process of planning the public space structure and the factors influencing the effective transformation of post-industrial areas, the authors argue that the appropriate tool for the transformation of larger and integrated urban units of the city would be an equivalent of the former master plan. The basic content that should be included in such a plan is the functional and spatial structure, defining in particular the form and the layout of the city’s public space. The examples of master plans of Pelcowizna area in conjunction with the development plan analyzed in the text, in which hierarchical spatial structures have been distinguished, show the necessity to cover the entire urban unit with general guidelines and are an example of its more effective development. The article ends with a proposal of a method concerning the manner of constructing the city’s public space structure and being a condition for an effective transformation of post-industrial areas.

The article presents results of iced wire’s temperature approximation during process of heating this wire to melt ice. This approximation was implemented in Matlab using a two-layer feedforward artificial neural network (ANN). The results of the approximation are acceptable, but it is possible to improve them.

Atmospheric icing on traction lines is very important problem because it causes difficulties of using electric vehicles by people and can result to breaking of traction lines. Heating the wire can preventing atmospheric icing.

Observation of experiences of Polish cities with railway areas shows that despite its unquestionable advantages, railway contributed to the strengthening of spatial divisions and the separation of individual areas. In the era of technological progress, tunneling of railway lines in city centers facilitates investment process in these previously problematic but exposed areas in the city landscape and contributes to their revitalization. The aim of this article is to present methods of work on a degraded post-railway area in an incoherent spatial structure of the city and to show how the effective design supports the revitalization process by complementing social activities. Based on variant, study examples, the area of the Vilnius railway line and the surrounding areas located in the Warsaw district of Praga Północ have been analyzed. The article is a part of the debate on the proper designation of the revitalization area on the basis of reliable data taken from the analyzes of existing and planned conditions in the spatial and functional context of larger urban units.