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Extra Performances by the Constructional Procurement Contracts in Czech Republic and Germany
Uhlířová, Monika ; Štěpánek, Petr (advisor) ; Kovařovicová, Eva (referee)
This thesis deals with the issue of extra performences, ie. constructional procurement contracts amendments. The main objektive was to compare the legislativ of extra performances in the Czech Republic and Germany and to study the influence of both legislations on the practice in the construction industry. There have been solved causes why the extra performances are needed and their legitimacy, as well as the consequences which are result from the imperfection of the legislative in both countries. There are also analyzed the cancelled perfomances and the question of edgibility against the extra performances. Finally there are sumarized some recommendations for both countries to improve their legal basis in this area.
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Predictability of wind famrs operated by Amper-Market company
Farda, Aleš ; Rajdl, Kamil ; Štěpánek, Petr
This report contains an analysis of the electric energy production of wind power plants of the company Amper Market a.s. from the point of view of its predictability, with the main objective of determining the potential accuracy of hourly predictions of the power production. To calculate the analyzed predictions a regression forecasting model utilizing wind speed and direction in two height levels is used. The necessary values of these meteorological variables are obtained from three numerical weather prediction models – Aladin, EPS Aladin and IFS. The accuracy of the energy production predictions is optimized regarding the choice of suitable geographical points for obtaining outputs of the numerical models, the combine utilization of the models and individual setting of the regression model for the single power plants. The analysis was performed based on data from the period January 2013 to April 2014.
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Quality control and homogeneity testing of daily time series of eca ECA&D
Zahradníček, Pavel ; Štěpánek, Petr ; Farda, Aleš ; Skalák, Petr
For any meaningful climate analysis, it is necessary for analysed time series to be homogeneous, which means that their variations are caused solely by variations in weather and climate (Conrad and Pollak 1950). Th us, prior to any analysis, the need to homogenize data and check their quality arises. Unfortunately, most of the climatological series that span over decades, to centuries, contain inhomogeneities caused by station relocations, exchange of observers, changes in the vicinity of the stations (e.g. urbanization), changes in instruments, observing practices (e.g. diff erent formulas for calculating daily means, diff erent observation times), etc. In this work we focused on testing the quality and homogeneity of daily data produced by ECA&D. Th is is a free available dataset of daily meteorological elements from the European Climate Assessment & Dataset (http://eca.knmi.nl/). Th is database was used to create a regular grid of EOBS points, which are oft en used to validate climate models.
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Comparison of corrected and uncorrected model simulations in the perspective of climate change in the area of the Czech Republic
Štěpánek, Petr ; Farda, Aleš ; Zahradníček, Pavel ; Skalák, Petr
In recent years, simulations from various regional climate models became available for the area of the Czech Republic, thanks to several national and international projects (e.g. the EC FP6 projects CECILIA, ENSEMBLES or the national project VaV SP/1a6/108/07). Th e simulations of all the models were performed according to the IPCC A1B emission scenario with various spatial resolutions. Since models suff er from biases, the model outputs were statistically corrected using the quantile approach of M. Déqué. Aft er correction, the RCM outputs were statistically processed and analyzed, especially for air temperature and precipitation, but also for other elements (like relative humidity, wind speed and sunshine duration). In this study, the diff erences between models outputs, as well as the corrected and uncorrected results, are presented.
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Misleading advertising from the point of view of average consumer
Hobzová, Anna ; Štěpánek, Petr (advisor) ; Vavrečka, Jan (referee)
This bachelor's thesis deals with the European legislation of consumer protection from misleading advertising using the institute of average consumer. The objective is to determinate whether the institute in its current form works efficiently and really protects the consumer. After explanation of basic terms and application of the method of average consumer on some specific situations, the thesis concludes, that the current way of using average consumer is not sufficient. The thesis also brings a possible solution created by the author.
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Temporal Evolution of Dry and Wet Conditions in the Czech Republic During the Growing Season
Potop, V. ; Boroneant, C. ; Možný, Martin ; Štěpánek, Petr ; Skalák, Petr
In the present study, the Standardized Precipitation Evapotranspiration Index (SPEI) was adopted to assess temporal evolution of wet and dry months during growing season (April to September) in the Czech Republic based on a dense network of 184 climatological stations for the period 1961–2010. The SPEI were calculated with various lags, 1, 3, 6, 12 and 24 months because the drought at these time scales is relevant for agricultural, hydrological and socio-economic impact, respectively. To assess the temporal evolution of dry and wet conditions during the growing season, first, the monthly time series of the SPEI for the months April to September were averaged at each station for each SPEI accumulation period (1, 3, 6, 12 and 24 months, respectively). Then, these SPEI time series were averaged over all 184 stations to get a time series of drought index at country level. The temporal evolution of the SPEI with one month lag represents the year by year moisture characteristic of the current growing season. In this respect, at country level, during the second half of the 20th century and the first decade of 21st century, the hierarchy of the driest years during the growing season was 2003, followed by 1992, 2000, 1983, 1982, 1976, 2009 and 1999. On the other hand, the wettest years during the growing seasons were 1965, 2010, 1977, 1996, 1966, 2001, 1972, 1980 and 1995.
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Analysis of Rainfall Intensity in the Area of Brno
Štěpánek, Petr ; Zahradníček, Pavel ; Doleželová, M.
The measurements of 18 stations in the area of Brno, in the Czech Republic, were established for the purpose of better management of the city sewerage system. The background for the measurements was to propose optimizations for the sewerage network for occasions of extremely intense precipitation. The automatic precipitation stations (instrument type SR 02) were installed with respect to the prevailing wind direction (inflow), and at least four stations were situated along the main sewerage routes (Prax et al., 2010). These measurements were combined with the measurements of CHMI. Before evaluation of the measurements, quality control was executed on the daily sums and 15-minute precipitations and all suspicious data were compared with radar measurements and erroneous input data were removed. From this quality-controlled data, the maxima of precipitation sums for durations of 5, 10, 15 and 60 minutes were calculated for the given time frames (months, seasons and years) and were spatially analyzed.
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Climate Change in the Area of the Czech Republic according to Various Model Simulations
Štěpánek, Petr ; Skalák, Petr ; Farda, Aleš ; Zahradníček, Pavel
In recent years, simulations from various regional climate models became available for the area of the Czech Republic, thank to several national or international projects (e.g. the EC FP6 projects CECILIA, ENSEMBLES or VaV). The simulations of the all models were performed according to the IPCC A1B emission scenario with various spatial resolutions. Since models suffer from biases, the model outputs were statistically corrected using the quantile approach of M. Déqué. After correction, RCM outputs were statistically processed and analyzed. In this paper, the differences between models outputs, as well as corrected and uncorrected results, are presented.
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