The presented work follows the first part [1], which is focused on the analysis of bone tissue in terms of dependence of bone tissue 'quality' and its subsequent behaviour based on the stress around the disk implant when biting.
This second part is focused on the stress-strain analysis (and tolerability) of disk implants as loaded during the masticating process.
The study includes two types of disk implants (single-disk and double-disk), three types of anchorage, four degrees (stages) of osseointegration in three quality degrees of the cancellous bone. The study, as expected, has shown that the problematic area of he implants is a transition between the implant body and the disk component, where the equivalent stress in the analyzed implants reaches 700 MPa. and Obsahuje seznam literatury
Bothriocephalidean tapeworms parasitic in the blackfish, Centrolophus niger (Gmelin) (Perciformes: Centrolophidae), are redescribed on the basis of the evaluation of freshly collected specimens and museum material. This evaluation enabled us to supplement species diagnoses by new morphological characters of potential use for phylogenetic analyses, including the data from scanning electron microscopical observations, and to provide a key to identification of the following four species occurring in this fish: Amphicotyle heteropleura (Diesing, 1850); Milanella familiaris Kuchta et Scholz, 2008 (both Triaenophoridae); Bothriocotyle solinosomum Ariola, 1900; and Echinophallus wageneri (Monticelli, 1890) (both Echinophallidae). Large spiniform microtriches were observed on the surface of the posterodorsal margin of segments of B. solinosomum, E. wageneri and M. familiaris. The invalidity of Atelemerus Guiart, 1935, first proposed by Bray et al. (1994), is supported by the present data and its type species, A. acanthodes Guiart, 1935, is newly synonymised with E. wageneri.
This article deals with numerical modelling of contaminant transport in a locality near Bzenec. From the 1970s to the 1990s, this locality was subjected to groundwater contamination by chlorohydrocarbons (PCE, TCE, DCE). The locality is known for its drinking water supplies, which serve for over 100 000 people. Since 1992 remediation of the locality has been in progress, with several breaks due to funding problems. Numerical modelling was used as a method for assessing the efficiency of remediation and for predicting the contaminant transport until the end of 2006. In order to model contaminant transport, a 3D groundwater flow model was first created, calibrated and verified in steady state. Then the transport model was built to simulate contaminant transport. The modelling of contaminant transport was solved by using several scenarios where the input values for the dispersion, sorption and decay parameters were verified using measured values of contaminant concentration in the region of interest. and Článek se zabývá numerickým modelováním šíření znečištění v blízkosti Bzence. V průběhu 70. až 90. let minulého století došlo v této lokalitě ke kontaminaci podzemní vody chlorovanými uhlovodíky (PCE, TCE, DCE). Tato lokalita je významným zdrojem pitné vody pro více než 100 000 obyvatel. Od roku 1992 probíhájí v lokalitě sanační práce, které byly z finančních důvodů několikrát přerušeny. Pro ověření účinnosti sanačních prací a pro predikci šíření znečištění do konce roku 2006 byla využita metoda numerického modelování. Aby bylo možné simulovat proces šíření znečištění, byl nejprve sestaven, zkalibrován a verifikován třírozměrný model proudění podzemní vody pro ustálený stav. Potom byl vytvořen transportní model. Transport kontaminantu byl modelován v několika scénářích, lišících se hodnotami parametrů disperze, sorpce a rozpadové konstanty. Hodnoty těchto parametrů byly verifikovány pomocí měřených koncentrací znečišťujících látek v oblasti.
This study focuses on the discovery of iron components of a wheellock pistol found to the south of Hradec nad Moravicí on the route of a former historical road that linked Opava with Moravia. The find consists of an octagonalsection barrel with a lead projectile and a lock plate with an almost complete lock mechanism. The keys to dating the find and determining its provenance are not only the shape of the barrel, but primarily the design of the wheellock mechanism and the shapes of several of its components. Based on the shape of the dog, the manner in which the lock plate was fixed into the wooden body of the pistol, and particularly the existence of an internal dog leaf spring, the pistol can with a high degree of probability be identified as a product of one of the gunsmiths’ workshops in the German towns of Braunschweig or Goslar during the 1570s or 1580s. The find from Hradec nad Moravicí adds to the group of archaeological discoveries of European and North American firearms with wheellock mechanisms, and the study provides a selective overview of this group.