Bøger udgivet af Sudwestdeutscher Verlag Fur Hochschulschriften AG

Das Projekt: schwul und katholisch, eine christliche Gemeinschaft von und für Lesben, Schwule und ihre Freund*innen (PSK) in Frankfurt am Main ist die erste deutsche, katholische Gemeinschaft, die seit über dreißig Jahren ununterbrochen Gottesdienst feiert. Ihre ökumenische Gastfreundschaft sowoie ihre basiskirchliche Orientierung auf Grundlage der Dokumente des zweiten Vatikanischen Konzils und einer schwule Befreiungtheologie bestimmen das Selbstverständnis dieser Gottesienstgemeinschaft. Das PSK ist sowohl mit der lesbisch-, schwulen-, trans- Community auf lokaler und europäischer Ebene als auch mit der diözesanen- und stadtkirchlichen Ebene vernetzt. Das Coming out, das Sichtbarwerden von Lesben, Schwulen, Bisexuellen, Transsexuellen und Transgender ist ein wichtiges Lebens- und Glaubenszeugnis und zu einer wichtigen Lernerfahrung innerhalb der Kirchen geworden.

The book analyzed the harmonic of the SPWM inverter and traction motor. In Simpack simulation software, subway train model is established, with motor, rotor, big gear and small gear and so on in metro traction electric drive system. In the Simulink simulation software, traction motor direct torque control model is established, and electromechanical coupling model is established by using the software co-simulation. Simulation analysis is conducted under constant speed condition of 60 km/h, finding that 12 times rotor fundamental wave frequency have a great effect on the vibration of the bogie.

In this work, a novel predictive control scheme for the permanent magnet synchronous machine by using a pulse-width modulation technique of variable switching frequency and variable sampling time is proposed. The control scheme is based on the model-based predictive control theory and makes use of a flexible pulse width modulation stage that can be reconfigured during the operation of the system without stopping the execution. The proposed control scheme demands a high degree of flexibility in the implementation and a fast signal processing. Therefore, a FPGA implementation was mandatory that allows the realization of most of the control algorithm in silicon and a parallel execution. The proposed predictive control approach, successfully overcomes the majority of the drawbacks of conventional field-oriented control and eliminates some of the drawbacks of conventional model predictive control, delivers good dynamics in the torque behavior and exploits the parallel processing capabilities and high computational power provided by an FPGA implementation. Sensorless implementation complements the proposed predictive control strategy.

Despite the widespread use of more and more effective detection technologies such as tandem-mass spectrometry, it is becoming increasingly clear that proper sample preparation is still the key to a successful analysis. The most important demands are thereby complete automation, sensitivity, reliability, economic efficiency and also implementation of ¿green¿ technologies that conserve our environment, e.g., by avoiding the use of larger volumes of organic solvents. Modern microextraction techniques can fulfill these demands and are already capable of replacing many traditional, manual sample preparation approaches. This thesis presents advances in the field of microextraction technologies. The primary scope is thereby the development and evaluation of a novel solid-phase microextraction device (SPME). PAL (prep and load) SPME Arrow retains all advantages of the classical SPME fiber and augments this proven concept with improved mechanical reliability and sorption phase volume. Initial evaluation of the method shows significantly increased extraction yields and a potential to further advance the field of SPME.

In current organic photovoltaic devices, the loss in energy caused by the inevitable charge transfer step leads to a low open circuit voltage, which is one of the main reasons for rather low power conversion efficiencies. A possible approach to increase the voltage is to lower the exciton binding energy, which can be accomplished by materials with a higher dielectric constant. It is shown how to calculate the dielectric constant with ionic and electronic contributions and how to obtain the exciton binding energy by using the density functional theory framework. We obtain a lower limit of the exciton binding energy for different commonly used one dimensional molecules, and an improved dielectric constant for a ladder polymer with polar side-chains. Different arrangements of a donor and an acceptor molecules are discussed in terms of the exciton binding energy of the respective charge transfer state. It is shown that a spatial separation between the donor and acceptor molecule can lower the exciton binding energy by a factor of two.

This work covers the synthesis and electrochemical characterization of donor doped barium titanate ceramics via impedance spectroscopy. Two synthesis routes were followed: The solid oxide route for microscale products and the oxalate process for nanosynthesis. The particles as well as the micrographs of sintered specimens were characterized with scanning electron microscopy. The necessary sample preparation in respect to the grain size of the material is explained in detail. Industrial samples of donor doped barium titanate were also characterized by means of impedance spectroscopy. The work offers a good introduction to the literature and methods which are applied for the characterization of electroceramics. A small chapter covers optical measurements like reflectance spectroscopy in the UV-VIS-NIR as well as solid state luminescence spectroscopy.