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One of the most important parameters in a burning chamber - in power stations, in waste to energy plants - is the temperature. This temperature is in the range of 700-1500 °C - one of the most advanced measuring methods being the acoustic pyrometry with the possibility of producing temperature mapping in one level of the burning chamber - comparable to computer tomography. The results of these measurements discussed in the presentation can be used - to fulfil the legal requirements in the FRG or in the EU - to equalise the temperature in one level of the burning chamber to optimise the steam production (better efficiency of the plant) and to minimise the production of temperature controlled flue gas components (NO, CO a. o.) - to control the SNCR-process if used.
Temperature-dependent ranges of coexistence in a model of a two-prey-one-predator microbial food web
(2012)
The objective of our study was to analyze the effects of temperature on the population dynamics of a three-species food web consisting of two prey bacteria (Pedobacter sp. and Acinetobacter johnsonii) and a protozoan predator (Tetrahymena pyriformis) as model organisms. We assessed the effects of temperature on the growth rates of all three species with the objective of developing a model with four differential equations based on the experimental data. The following hypotheses were tested at a theoretical level: Firstly, temperature changes can affect the dynamic behavior of a system by temperature-dependent parameters and interactions and secondly, food web response to temperature cannot be derived from the single species temperature response. The main outcome of the study is that temperature changes affect the parameter range where coexistence is possible within all three species. This has significant consequences on our ideas regarding the evaluation of effects of global warming.
Temporärer, mobiler Lebensraum: ein Wohnkonzept für Tinyhouses aus alten, ungenutzten Bahnwaggons
(2021)
Das Olympiagelände in München wurde im Jahre 1972 durch die Münchener S-Bahn erreichbar. Nach der Nutzung während der Olympischen Spiele wurde die Strecke weiterhin von der Linie S3angefahren, aber schließlich 1988 stillgelegt und steht seither unter Denkmalschutz. Das umfassende Gelände ist bis heute gut ausgebaut und bietet viel Raum für Freizeitaktivitäten. Nun bietet sich dieser Standort für ein neues Wohnkonzept an. Aus alten, nicht mehr nutzbaren Bahnwaggons entstehen Tinyhouse-Module. Aus dem alten Olympiabahnhof der S3 wird ein neues Viertel für junge Leute, Studenten und alle anderen, die sich vorstellen können in einem Tinyhouse zu wohnen.
In the context of the Solvency II directive, the operation of an internal risk model is a possible way for risk assessment and for the determination of the solvency capital requirement of an insurance company in the European Union. A Monte Carlo procedure is customary to generate a model output. To be compliant with the directive, validation of the internal risk model is conducted on the basis of the model output. For this purpose, we suggest a new test for checking whether there is a significant change in the modeled solvency capital requirement. Asymptotic properties of the test statistic are investigated and a bootstrap approximation is justified. A simulation study investigates the performance of the test in the finite sample case and confirms the theoretical results. The internal risk model and the application of the test is illustrated in a simplified example. The method has more general usage for inference of a broad class of law-invariant and coherent risk measures on the basis of a paired sample.