This article is an archaeological report on the results of the excavation carried out around the fi lled-up river branch and bridge No. 1 in Mikulčice in 2012 (excavation B 2012). The main aim of the research was to complete the fi eld works at bridge No. 1, which was discovered during the large-scale excavations performed at the defunct river channel in front of the NW gate of the bailey in 1966-1968. At the same time, the question of how the river channel developed at the site of the bridge was investigated, as well as the topic of the settlement in the wider area between the bailey and the north-western suburb. Presented along with the interpretation of the movable fi nds from the defunct river branch were two possible variants on how the settlement developed in relation to the gradual fi lling-up of the river channel. After analysing the fi nd circumstances in area B 2012, the authors inclined towards the second variant and thus revised the existing theories concerning the evolution of sedimentation in the area of the extinct riverbed. This has helped to resolve some key questions regarding the existence and demise of the power centre in Mikulčice., Marek Hladík, Lumír Poláček., and Obsahuje seznam literatury
At present, the catalogue of early mediaval bridges in the nort-western part of territory with Slavic settlement contains 81 localities: 47 in Germany and 34 in Poland. In some of them more than one bridge (2 to 3 structure) was documented, bringing the total number of bridges to 101. Construction dates, different prhases in the lives of the bridges and dates ranges for when they were reapired were obtained based on dendrochronology and spartial-chronological analysis. The present anaylsis deals with 48 bridges from 37 localities in north-west Slavic territory: 22 in Germany and 16 in Poland. In 16 cases more or less probable reconstructions have been made and four basic types of bridges ascertained., Gerard Wilke., and Obsahuje seznam literatury
The paper presents cellular automata as a promising modeling approach to simulate the diffusion process as a 2D task. The proposed methodology is applied to the degradation assessment of civil engineering structures describing more realistically the spatial and temporal variability of harmful substance ingress (e.g. chloride ions in concrete). Some illustrative examples are presented together with an example of application to a particular bridge. and Obsahuje seznam literatury
The subject of this analysis is Bridge No. 1 in Mikulčice, which was discovered during a large-scale archaeological excavation of a former riverbed between the years 1966 and 1968 and revisited in 2012. Although it is the best preserved bridge in Mikulčice, reconstucting it faces a number of limitations. The aim of this article is to define in more detail such limitations as well as possibilities, drawing on previous attempt to reconstuct this bidge. During the processing of the find situation of Bridge No. 1 foru "key questions" regarding reconstruction have been formulated. Our resulting statement says that in the fiven circumstances we cannot exclude the existence of a number of substantial reconstructions of the bridge, or rather the existence of more bridges constucted over time in the same place. Because only the load-bearing parts of the bridge´s construction have been preserved, we know almost nothing about the part above water level. Here we can be inspored especially by mediaeval and modern era bridges in period representations or by bridges of similar constuction that are still standing. There remains the general quetion of the origin of the bridge´s consturction, which has analogies in a nuber of La téne and Roman localities in Western Europe. A possible explanation is that the Classical tradition of engineering may have been mediated by the provinces in the Danube region., Lumír Poláček, Gerard Wilke., and Obsahuje seznam literatury
The article summarizes the current state of knowledge of bridges and river channels in the 9th century Mikulčice. It defines the basic themes of a new project, which is expected to synthesize unique large-scale excavations of filled -up river channels in Mikulčice. The excavations took place between 1966 and 1984 and yielded wooden structures and artefacts — uncommon for this region. The main focus of this article is the structural features and dating of three archaeologically documented wooden bridges. Two of the structural designs are specific to the local water features. Bridge designs include classical river structures used by Celts and Romans, as well as a design similar to lake bridges known from regions settled by north-western Slays. The most well preserved bridge (No. 1) allows dendrochronolo gical dating and detailed reconstruction. Many questions remain unanswered regarding bridges, archaeological and palaeoecological reconstructions offilled-up oxbows., Lumír Poláček., and Obsahuje seznam literatury