Monthly and dekadal mean soil temperatures were evaluated with a use of measurements at depths of 5, 10, 20 and 50 cm, collected during the expeditions 1978—1986 and additionally at depths of 80 and 100 cm during the expeditions 1980—1986. Fourier analysis revealed a phase shift of 1 to 2 dekads between neighboring measurement depths.
Functional urban areas (FUA) have became an important component of polycentric settlement structure of all European countries. FUAs have been defined as labour market basins, composed on large city and its surrounding areas (commuting zones). The very spatial and economic concept formed the foundation of old industrial regions. Old industrialized regions with all the spatial challenges and economic problems could be also perceived as a specific type of functional urban area. In Poland, National Spatial Development Concept 2030 (NSDC 2030 2013) describes restructuring and revitalization of degraded areas and cities in terms of spatial policy measures addressed to the supporting of cohesion in problematic areas. That is why integrated revitalization programs of functional urban areas may become key instrument of regional spatial policy and urban strategies. In response to the problems of degraded land and related land-use conflicts, it can significantly help in establishing valuable solutions, as well as ensuring connections between environmental, social and economic needs in the development of functional urban areas.
The article reports the results of a comparative analysis made for three novel unconventional gear wheel forging processes based on the authors’ patented [5,6,21] plastic forming methods developed chiefly for the purposes of extruding hollow products as well as valves and pins. These processes are distinguished by the fact that part of the tooling elements which are normally fixed during conventional forging are purposefully set in motion. This is intended to change the conditions of friction at the metal-tool contact surface and to induce additional thermal effects due to the transformation of the plastic deformation energy into thermal energy and, as a consequence, to improve the plastic flow of metal and to reduce the force parameters of the process.