Baigiamajame magistro darbe nagrinėjamas mažo negilaus humusinio ežero, kuris tapo meromiktiniu dar prieš Černobylio avariją, užterštumas radioceziu. Tyrimai parodė, kad ežeras yra sudarytas iš dviejų atskirų baseinų. Viršutinė ežero dalis (iki 3 m gylio) tampa visiškai aerobine tik rudenį, kai ežere vyksta gravitacinis maišymasis. Ežero dugno nuosėdos žemiau kaip 3 m gylio anaerobiniame nesimaišančiame baseine užterštos radioceziu tik dėl branduolinio ginklo bandymų iškritų. Aukštesnis ežero baseinas yra papildomai užterštas radioceziu dėl įvykusios Černobylio avarijos. / Peculiarities of radiocesium contamination of a small shallow humic lake, which became meromictic before the Chernobyl accident, are examined. It is shown that the lake consists of two separate basins. Radiocesium load of the sediments below the 3-m depth in the anaerobic stagnant water part of the lake is mainly formed by nuclear weapons fallout. That load of the upper water basin is significantly larger due to additional contamination after the Chernobyl accident.

The city of Nairobi, Kenya, is plagued by the aching problem of multitudes of stagnant churches cramping the metropolis amidst a few mega churches. This research aims to identify the factors of revitalization in selected churches that have succeeded in bringing about a turnaround in this urban context and to propose a model feasible for revitalizing stagnant churches in the city. The researcher wants to go beyond acknowledging the urban church growth problem of stagnation by seeking to understand the perceptions of numerical growth amongst church leaders and the members of six selected churches that have undergone a turnaround in Nairobi. These churches are: African Inland Church; All Nations Gospel Church; Deliverance Church; Gospel Revival Centre Church; Pentecostal Assemblies of God; and Uthiru Pentecostal Church. Using a mix of qualitative and quantitative research methods, questionnaires were administered to 600 randomly selected church members from six selected churches, while face-to-face interviews were conducted with 100 pastors and church leaders. The analysis of both research instruments led to the discovery of perceptions of what constitutes the factors of stagnation and revitalization at the different stages of each congregation. In order to develop a proposed model of revitalization for the metropolis, eight critical elements of revitalization common to all the churches were identified and analysed as normative turnaround elements. Two groups of supplementary factors of revitalization were noted in addition: common factors that address converts’ entry points and membership expectations, and non-common issues that may not be applicable universally, but nevertheless play significant roles in church growth, depending on the context and strategy that a local congregation opts for. The research contributes to the understanding of urban mission work and church growth within the context of a growing African metropolis like Nairobi. A few urban mega churches colour the perception of missiologists and church historians on the plight of sprawling stagnant congregations on the African continent. The implication that this holds for urban missio Dei is the wholesale marketing and misapplication of the strategies used by big churches to small congregations, leading to an increased decline in membership and eventual retardation of the salvation of the city. Furthermore, the city church perceives spiritual growth to be subsumed in the pursuit of numerical growth, and that God is where the ‘church’ is, leading to a gulf between growth and grace in the urban mission work of Nairobi. Churches stagnate not because of a lack of external inducement to growth (the existence of which is neither a necessary nor a sufficient condition to church growth), but the absence of internal growth dynamics. This originates with a weak and non-credible pastor that has lost vision and passion for sacrificial ministry to a congregation that is adrift in the church boat of socio-political wrangling and misplaced kingdom priorities. The church begins to grow when it starts to act out its calling as salt and light in the world. Again, churches grow inside out and the turnaround experience is a product of strong pastoral leadership that is surrounded by a balanced mix of well mobilized and enabled members serving in all units of church ministries. When set in motion, such a revitalization process will propel the urban church to both quantitative and qualitative growth that would prepare it in readiness for its place in the New Jerusalem where “all nations, and kindreds, and people, and tongues” will gather with the shout of the final hallelujah “to him who sits on the throne and to the Lamb” that “was slain to receive power and wealth and wisdom and strength and honour and glory and praise” (Rev. 5:12, 13). / Thesis (Ph.D. (Missiology))--North-West University, Potchefstroom Campus, 2011.

The city of Nairobi, Kenya, is plagued by the aching problem of multitudes of stagnant churches cramping the metropolis amidst a few mega churches. This research aims to identify the factors of revitalization in selected churches that have succeeded in bringing about a turnaround in this urban context and to propose a model feasible for revitalizing stagnant churches in the city. The researcher wants to go beyond acknowledging the urban church growth problem of stagnation by seeking to understand the perceptions of numerical growth amongst church leaders and the members of six selected churches that have undergone a turnaround in Nairobi. These churches are: African Inland Church; All Nations Gospel Church; Deliverance Church; Gospel Revival Centre Church; Pentecostal Assemblies of God; and Uthiru Pentecostal Church. Using a mix of qualitative and quantitative research methods, questionnaires were administered to 600 randomly selected church members from six selected churches, while face-to-face interviews were conducted with 100 pastors and church leaders. The analysis of both research instruments led to the discovery of perceptions of what constitutes the factors of stagnation and revitalization at the different stages of each congregation. In order to develop a proposed model of revitalization for the metropolis, eight critical elements of revitalization common to all the churches were identified and analysed as normative turnaround elements. Two groups of supplementary factors of revitalization were noted in addition: common factors that address converts’ entry points and membership expectations, and non-common issues that may not be applicable universally, but nevertheless play significant roles in church growth, depending on the context and strategy that a local congregation opts for. The research contributes to the understanding of urban mission work and church growth within the context of a growing African metropolis like Nairobi. A few urban mega churches colour the perception of missiologists and church historians on the plight of sprawling stagnant congregations on the African continent. The implication that this holds for urban missio Dei is the wholesale marketing and misapplication of the strategies used by big churches to small congregations, leading to an increased decline in membership and eventual retardation of the salvation of the city. Furthermore, the city church perceives spiritual growth to be subsumed in the pursuit of numerical growth, and that God is where the ‘church’ is, leading to a gulf between growth and grace in the urban mission work of Nairobi. Churches stagnate not because of a lack of external inducement to growth (the existence of which is neither a necessary nor a sufficient condition to church growth), but the absence of internal growth dynamics. This originates with a weak and non-credible pastor that has lost vision and passion for sacrificial ministry to a congregation that is adrift in the church boat of socio-political wrangling and misplaced kingdom priorities. The church begins to grow when it starts to act out its calling as salt and light in the world. Again, churches grow inside out and the turnaround experience is a product of strong pastoral leadership that is surrounded by a balanced mix of well mobilized and enabled members serving in all units of church ministries. When set in motion, such a revitalization process will propel the urban church to both quantitative and qualitative growth that would prepare it in readiness for its place in the New Jerusalem where “all nations, and kindreds, and people, and tongues” will gather with the shout of the final hallelujah “to him who sits on the throne and to the Lamb” that “was slain to receive power and wealth and wisdom and strength and honour and glory and praise” (Rev. 5:12, 13). / Thesis (Ph.D. (Missiology))--North-West University, Potchefstroom Campus, 2011.

Modern geodynamic modeling is more complex than ever, and has been used to answer questions about Earth pertaining to the dynamics of the convecting mantle and core, layers humans have never directly interacted with. While the insights gleaned from these models cannot be argued, it is important to ensure calculations are understood and behaving correctly according to known math and physics. Here I perform several thermal 3-D spherical shell tests using the geodynamic code ASPECT, and compare the results against the legacy code CitcomS. I find that these two codes match to within 1.0% using a number of parameters. The application of geodynamic modeling is also traditionally to expand our understanding of Earth; however, even with a scarcity of data modern methods can provide insight into other planetary bodies. I use machine learning to show that coronae, circular features on the surface of the planet Venus, are not randomly distributed. I suggest the idea of coronae being fed by secondary mantle plumes in connected clusters. The entirety of the Venusian surface is poorly understood as well, with a large percentage being topographically smooth and much younger than the planet's hypothesized age. I use modeling to test the hypothesis of a large impact being responsible for a major resurfacing event in Venus's history, and find three distinct scenarios following impact: relatively little change, some localized change evolving into resurfacing through geologic time, or large-scale overturn and injection of heat deep into the Venusian mantle. / Doctor of Philosophy / Modern geodynamic modeling has been used to answer questions about Earth in wide-ranging fields. Despite technological improvements, it is important to ensure the calculations are understood and behaving correctly. Here I perform several tests using a code called ASPECT and compare the results against another code, CitcomS. I find that the two codes are in good agreement. Application of these techniques is also traditionally done for Earth, but modern methods can provide insight into other planets or moons as well. Coronae are circular features on the surface of Venus that are poorly understood. I use machine learning to show that these are not randomly distributed, and suggest a mechanism for the formation of clusters of coronae. The surface of Venus is also strange: it is both too flat and too young based on current ideas in planetary science. I use modeling to test whether a large impact could cause the details of Venus's surface we see today.

This diploma thesis deals with the description of the chemistry of stagnant and flowing surface waters in selected part of the Velká podkrušnohorská dump and subsequent statistical processing of data. Sulfates are dominating element of the stagnant and flowing water, which form sulfato complexes with elements Ca2 + and Mg2+. The values CHSKCr in stagnat water are half compared to flowing water (upper and lower reaches). Higher values CHSKCr are result of biochemical, chemical and biological processes in the aquatic environment in stagnant water.

This master thesis deals technology of floating islands and their application in practice. In the first theoretical part describes detail of physical and chemical properties of water, the cycle of substances in water and the distribution of standing water, which are considered the most suitable interest sites for the application and instalation of floating systems. The sekond part describes the measurement metodology, which was carried out in several stages on the research land of the Institute of Landscape Water Management. The measuremenr was focused on monitoring the quality characteristics of water in free artificial tanks (lysimeters). The first tank was with floating island, the sekond with floating rack without plants and the third tank with free surface (to ensure the simulation of the natural state). The measurement was under way in the calendar year 2017 and was divided into free stages (spring, summer, winter). During this period were monitored COD, total phosphorus, nitric and amoniacal nitrogen and dissolved oxygen, turbidity, pH, oxidation-reduction potential, water and air temperature and aggregate rainfall. Part of the master thesis is graphical and tabular evaluation of the results. The results are processed in the Minitab 16 statistical software, graphical representation is supplemented by the interlaced linear and cubic regression curves for easier search for the dependence of selected factors. The stages are compared at the end of the master thesis. At hhe end of summer 2017, the first application of the floating island according to utility model No. 31 169 was carried out within the Czech Republic on selected water reservoir in the Bílý Potok basin (Polička).

A model is developed to describe solute transport and retention in fractured rocks. It accounts for the fact that solutes not only can diffuse directly from the flowing channel into the adjacent rock matrix composed of different geological layers but can also at first diffuse into the stagnant water zone occupied in part of the fracture and then from there into the rock matrix adjacent to it. Moreover, the effect of radioactive decay-chain has also been studied in the presence of matrix comprising different geological layers. In spite of the complexities of the system, the analytical solution obtained for the Laplace-transformed concentration at the outlet of the flowing channel can conveniently be transformed back to the time domainby use of e.g. De Hoog algorithm. This allows one to readily include it into a fracture network modelorachannelnetwork model to predictnuclide transport through channels in heterogeneous fracturedmedia consisting of an arbitrary number of rock units withpiecewise constant properties. Simulations made in this study indicate that, in addition to the intact wall rock adjacent to the flowing channel, the stagnant water zone and the rock matrix adjacent to it may also lead to a considerable retardation of solute in cases with a narrow channel. The results further suggest that it is necessary to account for decay-chain and also rock matrix comprising at least two different geological layers in safety and performance assessment of the repositories for spent nuclear fuel. The altered zone may cause a great decrease of the nuclide concentration at the outlet of the flowing channel. The radionuclide decay, when accounted for, will drastically decrease the concentration of nuclides, while neglecting radioactive ingrowth would underestimate the concentration of daughter nuclides. / <p>QC 20140224</p>

Austrian playwright Jovita Epp's German language novel Amado mí­o, which takes place in post-WWII Argentina, is a modern adaptation of the traditional colonial novel. As such, the romances between the female main character, an Argentine of German descent, and her two love interests, an Argentine of Spanish descent (Criollo), and an Austrian Argentine, reflect the hopes and fears of persons and/or cultures caught up in the imperialist dreams of their nation. In the wake of WWII, Argentina becomes a space in which European(-descended) settlers can look back at Europe's "barbarism," questioning the imperialist worldviews that brought Europe to the brink of destruction. At the same time, these colonists search for European values that are salvageable from the cultural wreckage in Europe and employable in reconstructing a new identity in Argentina.