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The use of SPE methods for determination of ultratrace concentrations of platinum metals in environmental matrices
Ježek, Stanislav ; Zlámalová Gargošová, Helena (referee) ; Gregor, Tomáš (referee) ; Komendová, Renata (advisor)
This dissertation is focused on the study of sorption techniques for the determination of platinum and palladium on modified solid sorbents and ion exchangers. The final determination was made using atomic absorption spectrometry with electrothermal atomization (ET-AAS). Six modified sorbents were selected for the sorption study. Four modified non-polar silica gels were studied and two sorbents were based on styrene divinylbenzene copolymer. Furthermore, three cation exchange resins and three anion exchange resins were studied. The sorption efficiency of platinum and palladium was studied with modified sorbents and anion exchange resins. Furthermore, the influence of interfering elements (Fe, Cu, Zn, Pb, K, Na, Ca and Mg). Another parameter for evaluating the effectiveness of sorbents is the volume of the elution mixture required for effective elution of platinum and palladium from the sorbents. Based on the results, a sorbent was selected for the preconcentration of platinum and palladium from real environmental samples from the environment. The study of the concentration of platinum and palladium in environmental components is divided into two parts. The first part compares two cities with different sizes and vehicle concentrations. It is a regional capital in the Czech Republic – Jihlava and the capital of Austria – Vienna. For soil matrix sampling, locations near frequent traffic junctions were selected. In Jihlava, the concentration of platinum ranged from 16.93 to 38.72 ng.g-1 and for palladium from 2.705 to 8.452 ng.g-1. In Vienna, the detected concentrations were higher. Platinum concentrations ranged from 39.22 ng.g-1 to 159.2 ng.g-1 and for palladium from 18.45 ng.g-1 to 98.21 ng.g-1. The second part was focused on the busiest traffic junction in the Czech Republic - the D1 highway, focusing on the section near the Švihov water reservoir, which serves as one of the main sources of drinking water for the capital of the Czech Republic - Prague. Rain retention tanks - "lapolas" - are installed in this section. A soil sample was always taken in the vicinity of these lapolas, and from the lapolas the sediment in the reservoir and settled water at the outlet from the reservoir. These rain retention tanks proved to be suitable places for monitoring pollutants from automobile traffic.
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Measuring value-added in education
Potužníková, Eva ; Greger, David (advisor) ; Veselý, Arnošt (referee) ; Ježek, Stanislav (referee)
Value-added measurement is a general term for a variety of approaches that assess school effectiveness based on their students' learning progress. In the context of growing interest in monitoring educational achievement, value-added is gaining importance as a fairer measure of school contribution to student learning. The aim of this work is to give an overview of main approaches to value-added measurement and to prove their applicability in the Czech education system. Value-added is measured by statistical models that rely on the method of linear regression but vary in how they model the school effects and which independent variables they use. Value-added scores estimated by nine different models are compared in the empirical part of this work. The study uses data of 3016 students from 141 basic schools assessed in grades 4 and 6 in the Czech Longitudinal Study in Education (CloSE). Value-added estimates differ from average raw test scores and from effectivity estimates obtained from models that account for the students' socio-demographic characteristics but not for their prior test achievement. School effects obtained from different value-added models are highly correlated, but simple regression models classify more schools into groups with above-average or below-average value-added. Simple...
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Consolidation of the business process management in the area of semi-budgetary organizations
Ježek, Svatopluk ; Chlapek, Dušan (advisor) ; Řepa, Václav (referee)
This thesis is aimed on the business process management of semi-budgetary organizations in the Czech Republic. For description of the field of business process management, the work lists common definitions and important information that is linked to this area. Subsequently, there was described the specificity of public administration in the Czech Republic, taking into account the level of and ability to implement business process management in this area. The important part of this thesis is the analysis of assumptions, which should public organizations fulfill in order to implement business process management. Thesis focuses on business process modeling, both in terms of methodology and standards used, and from the perspective of adequate tools for creating business process models. The main focus of the work is on the consolidation of the business process models of semi-budgetary organizations simultaneous checked on a case study. Case study, which is part of the practical part of this thesis, is a modified description of the implemented project, which aimed to merge two semi-budgetary organizations, especially from the perspective of the consolidation process management and process models.
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