The objective of present work is to predict the thermal performance of wire screen porous bed solar air heater using artificial neural network (ANN) technique. This paper also describes the experimental study of porous bed solar air heaters (SAH). Analysis has been performed for two types of porous bed solar air heaters: unidirectional flow and cross flow. The actual experimental data for thermal efficiency of these solar air heaters have been used for developing ANN model and trained with Levenberg-Marquardt (LM) learning algorithm. For an optimal topology the number of neurons in hidden layer is found thirteen (LM-13).The actual experimental values of thermal efficiency of porous bed solar air heaters have been compared with the ANN predicted values. The value of coefficient of determination of proposed network is found as 0.9994 and 0.9964 for unidirectional flow and cross flow types of collector respectively at LM-13. For unidirectional flow SAH, the values of root mean square error, mean absolute error and mean relative percentage error are found to be 0.16359, 0.104235 and 0.24676 respectively, whereas, for cross flow SAH, these values are 0.27693, 0.03428, and 0.36213 respectively. It is concluded that the ANN can be used as an appropriate method for the prediction of thermal performance of porous bed solar air heaters.

The aim of the study is to present cycling as an active form of tourism in the context of the motivation of people cultivating it – in particular residents of the Municipality of Radom. The work indicates the essence and importance of cycling tourism, taking into account its types and infrastructure. Factors and trends influencing the development of cycling tourism – promoting a healthy lifestyle were discussed. Also presented are the results of research on the motivation of moving residents of the Municipality of Radom using the bike in individual age groups.

Artykuł ma na celu analizę koncepcji, kierunków i perspektyw badawczych, za pomocą których nauki o wsi opisują wiejskich mężczyzn. Analiza powstała na podstawie najważniejszych publikacji podejmujących temat relacji między płcią kulturową a wsią w szeroko pojętych społeczeństwach zachodnich. Artykuł opisuje społeczny kontekst tworzenia konstrukcji wiejskich męskości, ich przemiany oraz główne kategorie, które pozwalają na ich definiowanie. Wyodrębnione kategorie analityczne to: rolnictwo i jego znaczenie w kreowaniu figury rolnika/farmera jako symbolu męskości wiejskiej; alkohol i publiczne odgrywanie męskości; seksualność i erotyczne obrazy wsi; małżeństwo heteroseksualne i praktyki rodzicielskie. Celem artykułu jest ukazanie dynamiki wiejskich męskości i zmian, którym podlegają, oraz wskazanie wzajemnych powiązań miasta i wsi w kontekście męskości. Artykuł wskazuje na potrzebę zwrócenia uwagi na dotychczas rzadko poruszane w polskiej socjologii wsi kwestie, na przykład sytuację osób nieheteronormatywnych.

This paper analyses, using the recently restored Evangelical cemetery at Radzewice as an example, the circumstances of the phenomenon which should be described as funerary inheritance. The cemetery, just like tens of other cemeteries in its nearest vicinity, fell into oblivion after the Evangelical community was displaced. However, in contrast to the majority of non-Catholic burial sites in the region, its further decomposition and ruination were stopped owing to the activity of the persons indicated in the publication. The above was possible in view of certain specific local relations, the existence of which formed the basis of the inheritance process. Above all, they included the dominance of individual memory over the collective and the national memory, and the preserved sense of sacred space, connected with the area, space of the cemetery. The reconstruction of the former cemetery chapel was a harbinger of the restitution of the cemetery, which was carried out in the late 1980s. Its circumstances and consequences, i.e. the establishment of a memorial site and a new Catholic cemetery next to the former Evangelical cemetery, now covered by maintenance, picture the funerary inheritance announced by the title of this paper.