Da beim Einsatz von Stahlguss die Beschaffenheit den rechnerisch ansetzbaren Bauteilwiderstand direkt beeinflusst, muss eine Ausführungsqualität schon in der Entwurfs- und Planungsphase festgelegt werden. Eine Entscheidungsgrundlage bezüglich der Auswahl einer Qualitätsstufe in Abhängigkeit der Beanspruchung gibt es derzeit jedoch nicht. In dieser Arbeit werden daher zwei Bemessungskonzepte für den Tragfähigkeitsnachweis von Stahlgussbauteilen in Abhängigkeit der Gütestufe entwickelt. Since the internal condition directly influences the calculated component resistance by using cast steel, the requirement of a quality grade already has to be determined during the design and planning phase. However, there is currently no decision-making on the selection of a quality level depending on the load. Therefore, two design concepts are developed for the load-bearing capacity of steel castings depending on the grades.

The thesis investigates the formation of subaqueous patterns by means of high-fidelity numerical simulations which resolve all the relevant scales of the flow and the sediment bed. This is required to provide a space- and time-resolved information on the flow field and the sediment bed. Secondly, detailed analysis of the generated data allows to address the different governing mechanisms involved in the formation of patterns as well as to access the validity of various existing models.

To manage the influx of information into surgical practice, new man-machine interaction methods are necessary to prevent information overflow. This work presents an approach to automatically segment surgeries into phases and select the most appropriate pieces of information for the current situation. This way, assistance systems can adopt themselves to the needs of the surgeon and not the other way around.

The analysis of turbulent mixing in complex turbulent flows is a challenging task. The effective mixing of entrained fluids to a molecular level is a vital part of the dynamics of turbulent flows, especially when combustion is involved. The work has shown the limitations of the steady-state simulations and acknowledged the need of applying high-fidelity unsteady methods for the calculation of flows with pronounced unsteadiness promoted by large-scale coherent structures or other sources.

The annual report of the Institute for Nuclear and Energy Technologies of KIT summarizes its research activities and provides some highlights of each working group, like thermal-hydraulic analyses for nuclear fusion reactors, accident analyses for light water reactors, and research on innovative energy technologies: liquid metal technologies for energy conversion, hydrogen technologies and geothermal power plants. The institute has been engaged in education and training in energy technologies.

Bildverarbeitung spielt in vielen Bereichen der Technik zur schnellen und berührungslosen Datenerfassung eine Schlüsselrolle. Der vorliegende Tagungsband des „Forums Bildverarbeitung“, das am 1. und 2. Dezember 2016 in Karlsruhe als Veranstaltung des Karlsruher Instituts für Technologie und des Fraunhofer-Instituts für Optronik, Systemtechnik und Bildauswertung stattfand, enthält die Aufsätze der eingegangenen Beiträge. Darin wird über aktuelle Trends und Lösungen der Bildverarbeitung berichtet. Image Processing plays an important role in many technical fields for a fast and contactless data acquisition. The proceedings at hand of the “Forum Bildverarbeitung”, which took place on December 1 and 2, 2016 in Karlsruhe as event of the Karlsruhe Institute of Technology and the Fraunhofer Institute of Optronics, System Technologies and Image Exploitation, contains the articles of the submitted contributions. They report on current trends and solutions of image processing.

The increasing demand for powerful, reliable, and efficient gyrotron oscillators for Electron Cyclotron Resonance Heating (ECRH) in fusion plasma experiments requires a close look at the various factors in gyrotrons that determine gyrotron performance. In this frame, the influence of emitter surface roughness, emission inhomogeneity, and secondary electron generation on gyrotron operation is presented, with focus on Low Frequency Oscillations (LFOs) and Electron Beam Halo (EBH) generation.

Ein neuer Modellierungsansatz für die Simulation geschichteter Zweiphasenströmungen wird vorgestellt. Eine einfache Möglichkeit das Zusammenspiel von Turbulenz und Oberflächenwellen zu modellieren, bietet der Zweischichten-Turbulenzansatz. Die Wellenamplitude ist dabei als turbulentes Längenmaß für den Wellenbereich gewählt worden. Sie lässt sich dabei aus statistischen Gleichgewicht zwischen turbulenter kinetischer, turbulenter potentieller und turbulenter Oberflächenenergie berechnen. A new modeling approach for stratified two-phase flows has been developed. The two-layer turbulence model is a simple method to model the interaction between turbulence and surface waves. The wave amplitude is used here as turbulent length scale in the inner wavy region. It can be calculated from a statistical equilibrium between turbulent kinetic, turbulent potential and turbulent surface energy.

Diese Arbeit beschreibt, wie man natürlichsprachliche Schnittstellen für die Programmierung von Software-Anwendungen erstellen kann. Hierbei wird insbesondere betrachtet, wie die Textanalyse vom konkreten Einsatzszenario, d.h. der angesteuerten Software, entkoppelt und somit wiederverwendbar gemacht werden kann. Zur Evaluation werden zwei Fallstudien vorgestellt: Die befehlsgesteuerte Heimautomatisierung mit openHAB und die Erzeugung von 3D-Animationen aus englischen Drehbüchern mit Alice. This book presents an architecture for programming in natural language called NLCI. It decouples the application domain from the text analyses: NLCI is an extensible architecture and its components are reusable. NLCI is evaluated with two case studies in two radically different domains: translating commands for a home automation system (openHAB) and generating 3D animations from English scripts with Alice.

Conventional MRI has several limitations such as long scan durations, motion artifacts, very loud acoustic noise, signal loss due to short relaxation times, and RF induced heating of electrically conducting objects. The goals of this work are to evaluate and improve the state-of-the-art methods for MRI of tissue with short T₂, to prove the feasibility of in vivo Concurrent Excitation and Acquisition, and to introduce simultaneous electroglottography measurement during functional lung MRI.