Die Stärkung von schulischem Wohlbefinden bei Schülern durch die Förderung von Eigenaktivität am Beispiel einer bayerischen Haupt- bzw. Mittelschule

Die Forschungsarbeit beschreibt die Begleitung einer Schule über mehrere Jahre hinweg. Dabei fokussiert sich die Untersuchung auf die Ausgangsfrage wie sich schulisches Wohlbefinden bei Schülern steigern lässt. Das Forschungsanliegen wird durch die Idee geleitet, die Eigenaktivität der Schüler zu fördern

Ground Improvement by Stone Columns and Surcharge at a Tank Site

The ground improvement performed at the site of two 190-ft (57.9 m) diameter, 40-ft (12.2 m) high, 8 million-gallon (30,300 m3), circular steel water storage tanks consisted of installation of stone columns to mitigate liquefaction and lateral spreading potential and a surcharge program to reduce post-construction settlements. Settlement during the surcharge program ranged between 9 and 15 in. (225 and 375 mm) and post-construction settlement during the hydrotest was about 1.2 inches (305 mm)

DNA Barcoding for Industrial Quality Assurance

DNA barcoding methods originally developed for the identification of plant specimens have been applied to the authentication of herbal drug materials for industrial quality assurance. These methods are intended to be complementary to current morphological and chemical methods of identification. The adoption of these methods by industry will be accelerated by the introduction of DNA-based identification techniques into regulatory standards and monographs. The introduction of DNA methods into the British Pharmacopoeia is described, along with a reference standard for use as a positive control for DNA extraction and polymerase chain reaction (PCR). A general troubleshooting chart is provided to guide the user through the problems that may be encountered during this process. Nevertheless, the nature of the plant materials and the demands of industrial quality control procedures mean that conventional DNA barcoding is not the method of choice for industrial quality control. The design of DNA barcode-targeted quantitative PCR and high resolution melt curve tests is one strategy for developing rapid, robust, and reliable protocols for high-throughput screening of raw materials. The development of authentication tests for wild-harvested Rhodiola rosea L. is used as a case study to exemplify these relatively simple tests. By way of contrast, the application of next-generation sequencing to create a complete profile of all the biological entities in a mixed herbal drug is described and its potential for industrial quality assurance discussed

Assessment of low temperature electricity production with focus on geothermal energy

With the rise of environmental awareness and increased electricity prices, low temperature electricity production cycles are getting more and more into focus. These include applications that produce electricity from industrial waste heat, which otherwise would have been released to the environment. They can also be used for medium enthalpy geothermal heat sources from 125 to 225 °C. The purpose of this Master Thesis is to identify and compare different technologies to produce low temperature electricity, according to their profitability and efficiency. Moreover, this Thesis focuses on investigating electricity cycles for further use in geothermal power plant applications. Finally the specific case of Geotermica1 is studied. Low temperature electricity production cycles have been identified during a literature research. Based on that, the most promising cycles have been analysed in detail. These are the ORC (Organic Rankine Cycle), RORC (Regenerative Organic Rankine Cycle) and the LTD (Low Temperature Differential) Stirling engine. The analysis is carried out in Aspen + and with a modified Schmidt formula for the LTD Stirling engine according to Chen (2003). Starting with set boundaries, each cycle is researched in costume cases while varying the same heat source and sink. The LTD Stirling engine shows the best performance with 18.2% system efficiency. The simulated LTD Stirling engine, however, has a temperature limitation of 150°C and cannot be used above this temperature. For higher temperatures, up to 185°C, the highest efficiency was obtained with the RORC of 18.5%. In the Geotermica case, the LTD Stirling engine did not take part, due to missing economic data in the literature. With the expected well flows of the planned geothermal power station in the south of Italy on the Aeolian Islands and the local weather data, the RORC is most promising. The economic evaluation of the ORC and the RORC show as well, that the RORC is the most profitable, although it is the more expensive one with an investment cost of 10.2 Mio. € whereas the ORC costs 8.9 Mio. €. The RORC has an annual income of 6.3 Mio. € which is roughly 1 Mio. € more than the ORC. Together with the exploration and drilling costs of 30 Mio. €, the payback time is estimated to 6.4 years. 1 Geotermica is the company who plans to build the analysed geothermal power station in south Italy