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Sympecma fusca and S. paedisca occur in a wide spectrum of habitats within standing waters. However, the knowledge of these species distribution in oxbows is poor in Poland. In this study, new sites of S. fusca and S. paedisca along the Vistula River valley, be- tween Jawiszowice and Otałęż in the Małopolska Region (the Lesser Poland), are presented (Tab. 1, Fig. 1) and the importance of oxbows for...
W północno-zachodniej części Pojezierza Kaszubskiego, w bezpośrednim sąsiedztwie aglomeracji trójmiejskiej, odnaleziono torfowisko przejściowe z kompleksem torfianek, będące cenną ostoją owadów wodnych. Obiekt okazał się nieznanym wcześniej stanowiskiem pięciu gatunków parasolowych dla torfowisk sfagnowych, czterech gatunków ściśle chronionych i dwóch gatunków z listy Natura 2000. Na szczególną uwagę...
The paper presents the results of studies conducted in Roztocze Upland (SE Poland) during the camp of Student Scientific Circle of Biologists of Maria Curie-Skłodowska University in July 2008. At 27 study sites, of which 13 were situated in the Roztoczański National Park, 37 dragonfly species were found (51% of the national fauna). The most interesting were: Sympecma paedisca, Nehalennia speciosa,...
In this paper is shown methodology how to create a relatively small but at the same time accurate finite element model of the big models with shape difficulties. Dimensionality criterion is total number of degrees of freedom. Principle of simplification is similar to principle of macroelements. For solving was used program ANSYS, work was made with assistance of project of MSMT CEZ:J 17/98:2724019.
The flat conveyer belt can be used for transport of material in capsulated form. If both edges of the belt are clasped together, the material is rounded into closed volume. Then, during transport, the material can not be dumped. The important question is what is the rounded area because this determines the amount of transported material. Also the proportions of the clasped belt (especially horizontal...
This paper shows creating and solution of numerical model of fluid flow problem in paper machine. It shows this numerical model with its boundary conditions and results we received. Those results will be later used as loads for structural analysis and we will be try to calculate deflection of paper web.
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