The problematics of creation and development of bank erosion, follow-up repairs of abrasion damaged banks and development of abrasion progress prognostic methods is often discussed. One of the contributions to this discussion is presentation of ''Modificated Methods of Abrasion Terminal Line Determination''. The prognosis of bank erosion advance is determined also in areas, where original condition of bank is unknown. This method was successfully verified during years 1998-2001 at Brno Reservoir on the Svratka River and can be used at other dam reservoirs as well. and O problematice vzniku a rozvoje břehové abraze, o návrzích následné sanace abrazí poškozených břehů a vývoji prognostických metod postupu abraze se v posledních letech diskutuje stále častěji. Jedním z příspěvků k této diskusi je i prezentace ''modifikované metody určení abrazní terminanty''. Jedná se zde o stanovení prognózy postupu břehové abraze, a to i v oblastech, ve kterých neznáme původní stav pobřeží. Tato metoda byla úspěšně ověřována v letech 1998-2001 na údolní nádrži Brno na řece Svratce a je široce použitelná i na jiných vodních dílech.
Studies involving comparisons of taxa that vary in their degree of relatedness may allow the distinction of functional and phylogenetic components in cercarial sensory systems. In this study, cercariae of allocreadiids Bunodera Railliet, 1896 and Crepidostomum Braun, 1900, lecithodendriid Allassogonoporus Olivier, 1938 and opecoelid Allopodocotyle Pritchard, 1966 were compared as regards ultrastructure and chaetotaxy of sensory receptors as well as neuromorphology. Cercariae were treated with acetylthiocholine iodide and silver nitrate and some were processed for scanning and transmission electron microscopy. The types of cercarial sensory receptors differed in the presence of a tegumentary sheath, a dome-like base and a tegumentary collar, number of cilia (0, 1, 2 or more), cilium length (short, moderately long or long) and tegumentary collar length (low to moderately low, high or very high). Chaetotaxic patterns were consistent at the family level in all taxa studied. Irregular cholinergic nerve networks were identified. The present study indicates that the major categories of cercarial sensory receptors are nonciliated (including sheathed and subtegumentary types) and ciliated (including uncollared and collared types) receptors. It also allows the distinction of functional and phylogenetic components in the sensory systems of the cercariae studied. Functional components were reflected in the numbers of sensory receptors associated with each nerve region and in the ultrastructure and site-specificity of receptor types. Phylogenetic components included taxon-specific chaetotaxic patterns and receptor types.
The aim of the paper is to present transient calculations of an elastohydrodynamically lubricated (EHL) point contact. The paper focuses on the description of the numerical algorithm used to model non-smooth contacts with surface feature on one of the contacting bodies. Results of film thickness and pressure distributions of a selected surface feaure are presented. Simulations were performed and compared for two different rheology approaches (Newtonian, resp. non-Newtonian). and Obsahuje seznam literatury