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Detection of Failures and cavities in structures using radar
Tkadleček, Petr ; Anton, Ondřej (referee) ; Cikrle, Petr (advisor)
The bachelor‘s thesis describes non-destructive testing and methods, which are used in civil engineering. It is focused on the detection of failures and cavities in concrete structures. In the first part the methods are described and compared. The second part describes experimental measurements on concrete structures, which contain failures. The results are described and interpreted. The used methods are compared. It was evaluated, which of these methods is suitable for the detection of failures and cavities in structures.
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Využití přístrojových metod k hodnocení stavu stromů
Vančurová, Klára
The bachelor thesis is focused on the topic: Use of instrumental methods to evaluate the condition of trees. The first part of the literature review describes the vitality of trees and explains why they are evaluated. Subsequently, the work deals with the division of individual methods and devices into visual and instrumental evaluation. These are then further categorized according to their principle of use.Totaly were evaluated four instrumental methods of physiological vitality and for biomechanical vitality six visual and eighteen instrumental method. In the next part, based on the description of these instrumental methods, an analysis of companies in the Czech Republic was created, which provide measurement and evaluation of expert opinions with these instruments.
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Porovnání araneofauny dutin ovocných dřevin v okolí liniových staveb v Brně - Obřany a Rohozná
Boučková, Monika
The aim of my bachelor thesis was to determine the number of spiders in the cavities of fruit alley trees around the line structures (path, roads). I chose two localities, one made of fruit and the other leafy trees, which I then compare. I caught the spiders in the news traps during the 2014/2015 period every month. I found a total of 163 spiders, of which only 5 were adult. I found these adults in the summer months in a different kind of representation. The most numerous of them is the family Salticidae represented by 2 pieces. Juvenile individuals were the most represented by the families of Philodromidae. These species I discovered 61 predominantly on Malus domestica. Keywords: spiders, trees, cavities, line structures, adult, juvenile
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Porovnání araneofauny dutin ovocných dřevin v okolí liniových staveb v okolí Brna
Bednařík, Martin
The aim of my bachelor thesis was to collect spiders in the cavities of fruit trees in selected alleys along the communications of third class. Identify and evaluate the effects of tree species, dimensions of the cavity opening and the environment for the presence of spiders. I have collected the spiders only with a help of newspapers traps for a period of one year. Selection and set new traps took place at the beginning of each month. I placed a total of 504 traps that caught the 157 spiders. Of these, only 33 were adult spiders belonging to 12 species. For juveniles were most abundant genus Philodromus with 76 individuals. Of the adult spiders were the most numerous species Pseudicius encarpatus and Micaria subopaca. The occurrence of spiders were affected primarily by the dimensions of inlets cavities. The surroundings did not influence the results. Occurrence of spiders throughout the year was relatively balanced. The richest month was April with 27 individuals.
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Arachnofauna dutin hlavatých vrb
Boučková, Monika
The aim of this dissertation "Arachonofauna cavities of the head willows" was to find a cavity fauna that inhabits willow trees and point out the pollarding of willow trees as a suitable management for the formation of cavities. The chosen location for this research was Vojkovice near Židlochovice, where during the years 2018 – 2019 were examined 21 willow trees with the help of newspaper traps. Traps were always exchanged at monthly intervals. A total of 72 spiders were found, of which only 10 were adults. The most important finding of this work is the discovery of Midia midas (Simon, 1884), which represents a typical inhabitant of hollow fauna and is a highly endangered species. This finding indicates that willow cavities are also a refuge for rare species. Juvenile individuals were most represented in the Gnaphosidae family of 20 pieces. Most of the spiders found were synanthropic species, so they are close to humans.
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Porovnání araneofauny dutin ovocných dřevin v okolí Licibořic
Blažek, Jiří
The main target of my bachelor thesis was the analysis how the measures of cavities (diameter and depth) influenced ammount of spiders. The spiders were caught into the cardboard traps placed in cavities of fruit trees along the roads during the year 2015. Totally were caught 42 individuals (thereof 37 juvenile and 5 adult spiders) which were determined and sorted into the 9 genders. The measures of cavity had influence on spiders ammount. Cavities with diameter between 10 and 15 centimeters and deeper than 40 centimeters were the most suitable for spiders. The perimeter of tree trunk is also important. All of studied cavities were situated on trees with trunk perimeter more than 90 centimeters. Ammount of spiders varied during the year, the most abundant month was May. The most common gender was Philodromus.
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Araneofauna dutin ovocných dřevin v okolí obce Želetice
Bělohoubek, Jiří
The main target of my bachelor thesis was to measuring the frequency of spiders in the cavities of fruit trees around the village Želetice, their species composition and compare the results by different kinds of fruit trees in the study area. Spiders've fielded in card-board or newspaper traps for a year, always at monthly intervals and a total of 83 I found spiders, of which 9 were adult. For juveniles, the most represented family Phi-lodromidae and most frequent representative adults is Lepthyphantes leprosus. The most abundant month was November 2015, and most individuals was found on Malus domestica namely 48.8% of all spiders.
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Araneofauna dutin různých dřevin v okolí obce Hrotovice
Vymazalová, Pavla
Collection of spiders from fruit tree cavities was done in the period from 20th March 2014 till 20th January 2015 in Hrotovice surroundings. Among the total of 172 collected individuals there were identified 12 families. The most represented families are Clubionidae 23.8%, Gnaphosidae 20.3% and Dictynidae 19.2%. It was possible to identify just 55 of adult individuals into 14 species. The most represented species found on the surveyed sites was Micaria subopaca, which is an endangered species. Among other endangered species that occurs there were Clubiona marmorata and Lathys humilis. At the surveyed sites were also collected Pistius truncatus species and Pseudius encarpatus, which are the nearly threatened.
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Detection of Failures and cavities in structures using radar
Tkadleček, Petr ; Anton, Ondřej (referee) ; Cikrle, Petr (advisor)
The bachelor‘s thesis describes non-destructive testing and methods, which are used in civil engineering. It is focused on the detection of failures and cavities in concrete structures. In the first part the methods are described and compared. The second part describes experimental measurements on concrete structures, which contain failures. The results are described and interpreted. The used methods are compared. It was evaluated, which of these methods is suitable for the detection of failures and cavities in structures.
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