Im Hochbau, im Kranbau und in der Fördertechnik treten durch die Bewegung von Gütern und Maschinen wandernde Einzellasten auf, die in der Regel als Radlasten auf die meist aus Stahl hergestellten Tragkonstruktionen einwirken. Die Anschlüsse und Verbindungen dieser Konstruktionen erfahren im ...

This thesis is about a MATLAB toolbox for the Scintrex CG-5 gravimeter. The aim of this toolbox is to offer a basic data process for gravity measurement, which is compatible for most applications in geodesy. In particular, the toolbox covers: 1. data selection, &#...

Thermal striping induced fatigue cracking incidents in the vicinity of a T-junction - where coolant streams at different temperatures mix together intensively - has been reported in several Nuclear Power Plants (NPPs) and is considered a challenge to the safe operation of NPPs. The...

A good grasp of hydro-morphodynamic processes plays a major role in modern river management to accommodate its often-conflicting functions. In the last century, a variety of models has been developed to improve our perception of sediment transport and the resulting changes in river ...

The precision of feed drive systems depends strongly on the frictional behaviour of the bearing elements. Friction has two effects onto the feed drive system, on the one hand it improves the damping and reduces vibrations and on the other hand it induces nonlinear effects ...

Ziel der vorliegenden Arbeit ist es, einen Antriebsregler adaptierbar zu machen. In dieser Arbeit wird erstmalig ein Antriebsregler in den Kontext der Adaption gestellt und die Grundmechanismen der Adaption um die Rekonfiguration erweitert. Die Analyse und Defizitextraktion des Stands der Technik...

Konventionelle Methoden des Robust Design verfolgen größtenteils Ansätze zur Varianzbetrachtung, die potentiell über der Produkteinsatzzeit auftreten können. Daher geben diese Methoden keine genauen Informationen über das zeitlich funktionale Verhalten der sich verändernden Produkteigenschaften und -anforderungen sowie&#...

Field-effect transistors based on Mott insulators could overcome the limits encountered with modern electronic devices. In this work I investigate the construction of an all-oxide device amiming at characterizing the electric-field-induced metal-insulator transition in vanadium oxide (VO2) in order to...

Software repositories contain a lot of information that can be transformed into suggestions other files they need to modify during maintenance tasks (so-called “coupled changes”). Existing studies however ignore developer feedback and their influence on the developer strategy for getting help...

Calibration of numerical models is fundamental since the beginning of all types of hydro system modeling, to approximate the parameters that can mimic the overall system behavior. Thus, an assessment of different deterministic and stochastic optimization methods is undertaken to compare thei...

In this thesis, we study the parallel complexity of certain problems in algorithmic group theory. These problems are the word problem, the geodesic and normal form problem and the conjugacy problem. We study these problems for some products of groups, namely direct products, free&#...

Ankerschienen können Zugbeanspruchungen sowie Querbeanspruchungen senkrecht zu Schienenachse und in Schienenlängsrichtung über die am Schienenkörper unverschieblich befestigten Anker in den Beton einleiten. Für die Lastrichtungen Zug und Querlast senkrecht zur Schienenlängsachse stehen bereits Lastverteilungsansätze zur ...

Sustainability is a key global development goal. Countries, especially in the Western world, have created systems that ensure sustainable development including in the area of design and construction. On the other hand progress is rather slow in developing countries like those found...

Barium hexaferrite powder samples with grains in the m-range were obtained from solid-state sintering, and crystals with sizes up to 5 mm grown from PbO, Na2CO3, and BaB2O4 fluxes, respectively. Carbonate and borate fluxes provide the largest and structurally best crystals at sign...