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Monitoring degradačních vlastností karbonu
Němeček, Václav
In the diploma thesis there was made an attempt to compare the samples of carbon fiber composite materials (carbon). The teoretical part presents knowledge of the composition of composite material. Next, there is described the production and possible use of carbon composite materials in various technological branches. In the practical part the thesis focuses on the testing of composite materials made of carbon fiber with different orientation and weights of fibers. There is performed a tensile test and simultaneous monitoring of the course of the tensile test by acoustic emission. Finally, the statistical processing of the measured values occurs.
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Repeated individual comparasion of heart rate on the land and in the water
Němeček, Václav ; Thiel, Dan (advisor) ; Chrzanowská, Babeta (referee)
Title Repeated individual comparasion of heart rate on the land and in the water. Objective Find if exist significant difference of heart rate in repeated measurements between rating heart rate on dry land and in the water. Used methods The quantitative empirical research was carried out. The research method was the measurement of resting heart rate. Measurements were carried out in the form of intraindividual comparative analysis among six probands who were repeatedly tested supine for 5 minutes on land and subsequently 5 minutes in water. The water temperature was 30 řC and the water column height was 30 cm. Heart rate was measured using sporttester. Results The same tendency of reaction of the organism during repeated measurements did not confirm in 4 cases. Results in two cases confirmed the trend of decreasing heart rate during a stay in the water. The most measured resting heart rate decreased in water compared with the resting heart rate on dry land by 21.1% and increased the most by 6.1%. Keywords swimming, water, heart rate, resting heart rate, diving
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Comparasion of the loading rate each of types of pulling a browning
Němeček, Václav ; Sýkora, Karel (advisor) ; Nečas, Dušan (referee)
Title of work Comparasion of the loading rate each of types of pulling a browning. Work objektive Identify and compare the load on the hert rate of each types of pulling a drowning. Compare the types of puding using the resulting values determined by measuring heart rate and choose which of measured types will cause puding the browning the simplest and the least exhausting. Used methods Quantitative research follows the changes in heart rate while swimming particular types of puding drowning. Measurements were carried out in the form of intra-individual komparative analysis among three probands, who swam in the pool with counterflow, for 2.5 minutes at a flow speed of 1,06 m/s. Heart rate was measured using sporttester. Keywords military swimming, water rescue, pulling a browning, comparation of load, heart rate
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Disaggregation of rainfall data
Němeček, Václav ; Máca, Petr (advisor) ; Heřmanovský, Martin (referee)
The bachelor thesis studies selected disaggregation methods, which are used for the description of hydrological time series. The literature search provides the survey of important disaggregation methods. The special attention is put on disaggregation method using the Wavelet coefficients. The methods of moment were applied on estimation of parameters for disaggregation model. Variance reduction function were estimated for selected precipitation time series obtained from the MOPEX database.
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Kvalita založení porostů obilnin různými secími stroji
Němeček, Václav
In bachelor work, field trial, where quality of cereal stand establishment using different drilling machines was carried out. These drilling machines were used: Horsch Airseeder 6.25 CO, Pneusej Accord, Väderstad Rapid 600 S, Farmet Excelent Premium 6 and Kverneland Accord DA. In winter wheat with loosening, better quality of crop establishment was with Väderstad then Horsch. In variant with ploughing, in winter rye better results were with Horsch then Pneusej. In winter wheat with deeper loosening, drilling machines Farmet and Kverneland brought comparable results.
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