Publications
Now showing items 1041-1080 of 2508
New Methods to Improve Large-Scale Microscopy Image Analysis with Prior Knowledge and Uncertainty
(2017)
Multidimensional imaging techniques provide powerful ways to examine various kinds of scientific questions. The routinely produced data sets in the terabyte-range, however, can hardly be analyzed manually and require an ...
A new method of seawater desalination via acrylic acid based hydrogels: Synthesis, characterisation, and experimental realisation
(2014)
The scarcity of potable water is a great challenge. It may be resolved by the desalination of seawater. In this work, the possibilities of a new desalination technique using polymeric hydrogels as a separation medium for ...
Nonlinear state and parameter estimation of spatially distributed systems
(2009)
In this thesis two probabilistic model-based estimators are introduced that allow the reconstruction and identification of space-time continuous physical systems. The Sliced Gaussian Mixture Filter (SGMF) exploits linear ...
Nonlinear resonators for all-optical signal processing
(2007)
All-optical signal processing will be used in future communication networks. We discuss a new and generic scheme for such devices. The basic configuration comprises an asymmetric resonator within an active or passive ...
Nonparametric identification of nonlinear dynamic systems
(2018)
A nonparametric identification method for highly nonlinear systems is presented that is able to reconstruct the underlying nonlinearities without a priori knowledge of the describing nonlinear functions. The approach is ...
Optimizing Dual-Doppler Lidar Measurements of Surface Layer Coherent Structures with Large-Eddy Simulations
(2014)
Coherent structures are patterns in the wind field of the atmospheric boundary layer. The deployment of two scanning Doppler lidars facilitates the measurement of the horizontal wind field, but the inherent averaging ...
Optimization of Hot-Electron Bolometers for THz Radiation
(2013)
Hot-electron bolometers are fast and low noise radiation detectors which can be used for many different applications. The aim of this work was to optimize the fabrication process of hot-electron bolometers and gain a deeper ...
Permanente Optimierung dynamischer Probleme der Fertigungssteuerung unter Einbeziehung von Benutzerinteraktionen
(2015)
Despite huge research efforts only simple scheduling algorithms assist humans in their daily work. This work presents a comprehensive concept for a permanent running algorithmic scheduler intelligently collaborating with ...
Phasenstabilisierung und Oberflächenaktivierung von Sauerstoffseparationsmembranen aus dotiertem Ba$_{0,5}$Sr$_{0,5}$Co$_{0,8}$Fe$_{0,2}$O$_{3-?}$
(2019)
Ba$_{0,5}$Sr$_{0,5}$Co$_{0,8}$Fe$_{0,2}$O$_{3-?}$ (BSCF) is the most promising material für energy efficient oxygen separation membranes. But its electrical and transport properties are unstable at temperatures below 840 ...
Phase-field modeling of multi-domain evolution in ferromagnetic shape memory alloys and of polycrystalline thin film growth
(2013)
The phase-field method is a powerful tool in computer-aided materials science as it allows for the analysis of the time-spatial evolution of microstructures on the mesoscale. A multi-phase-field model is adopted to run ...
Phase-field simulations of multi-component solidification and coarsening based on thermodynamic datasets
(2017)
The utilization of thermodynamic and mobility data plays a major role in phase-field modeling. This work discusses different formulations for the thermodynamic quantities of a grand potential model along with practices to ...
Phase-field modeling of microstructural pattern formation in alloys and geological veins
(2016)
With the advent of high performance computing, the application areas of the phase-field method, traditionally used to numerically model the phase transformation in metals and alloys, have now spanned into geoscience. A ...
Physiologische Bewertung aktiver und passiver Lichtsysteme im Automobil
(2012)
Der Mensch definiert die funktionalen Anforderungen an Lichtsysteme im Automobil. So stellt sich mit der Integration neuer Konzepte im Fahrzeug vor allem die Frage nach deren Einfluss auf die Wahrnehmungsleistung des ...
Planning the Charging Infrastructure for Electric Vehicles in Cities and Regions
(2016)
Planning the charging infrastructure for electric vehicles (EVs) is a new challenging task. This book treats all involved aspects: charging technologies and norms, interactions with the electricity system, electrical ...
Plastische Verformungsmechanismen in hochgradig kaltgewalzten, ultrafeinkörnigen Wolframblechen
(2019)
Cold rolled tungsten sheets are regarded as promising materials for high-temperature applications. The correlation of microstructural features with strain rate sensitive, mechanical properties of differently thick cold ...
Optical Delay Interferometers and their Application for Self-coherent Detection
(2013)
Self-coherent receivers are promising candidates for reception of 100 Gbit/s data rates in optical networks. Self-coherent receivers consist of multiple optical delay interferometers (DI) with high-speed photodiodes attached ...
Optical Coherence Tomography guided Laser-Cochleostomy
(2014)
Despite the high precision of laser, it remains challenging to control the laser-bone ablation without injuring the underlying critical structures. Providing an axial resolution on micrometre scale, OCT is a promising ...
Optical antennas : linear and nonlinear excitation and emission
(2011)
The linear and nonlinear resonance behaviour of optical antennas (metallic nanostructures showing resonance behaviour at optical frequencies) made of gold and aluminum using electron-beam lithography is investigated. ...
Orbital Effects in Spaceborne Synthetic Aperture Radar Interferometry
(2013)
This book reviews and investigates orbit-related effects in synthetic aperture Radar interferometry (InSAR). The translation of orbit inaccuracies to error signals in the interferometric phase is concisely described; ...
Personalized Multi-Scale Modeling of the Atria: Heterogeneities, Fiber Architecture, Hemodialysis and Ablation Therapy
(2013)
This book targets three fields of computational multi-scale cardiac modeling. First, advanced models of the cellular atrial electrophysiology and fiber orientation are introduced. Second, novel methods to create patient-specific ...
Personalizing Simulations of the Human Atria : Intracardiac Measurements, Tissue Conductivities, and Cellular Electrophysiology
(2011)
This work addresses major challenges of heart model personalization. Analysis techniques for clinical intracardiac electrograms determine wave direction and conduction velocity from single beats. Electrophysiological ...
Opening digital fabrication: transforming TechKnowledgies
(2018)
This study analyses the field of open digital fabrication where novel digital capabilities and hopes for social transformation have merged to form arrangements that seek to democratise knowledge and technology through ...
Optimierung des Verformungswiderstandes von Splittmastixasphalt durch Modifikation mit Elektroofenschlacke
(2009)
Ziel dieser Arbeit war die Prüfung, ob und ggf. inwieweit durch Modifikation von Splittmastixasphalt mit Elektroofenschlacke (EOS) in verschiedenen Kornklassen eine Optimierung des Verformungswiderstandes unter Berücksichtigung ...
Optimierung von Verfahren zur Lösung rechtsrelevanter Wissensprobleme in kritischen Infrastrukturen : Befunde im Smart Grid und technikrechtliche Empfehlungen
(2018)
This work is concerned with regulation and the reconciliation of interests at the interface of energy sector and privacy law. To improve regulatory knowledge within the Smart Grid, an existing procedure of the Federal ...
Optimisation of hysteretic losses in high-temperature superconducting wires
(2014)
Hysteretic loss optimisations through numerical simulation and subsequent experimental confirmation in transport current and background field measurements: ferromagnetic shielding and topological geometry optimisation is ...
Optimierung der Energieeffizienz zweibeiniger Roboter durch elastische Kopplungen
(2014)
This work investigates the optimization of bipedal robots’ energy efficiency by using elastic couplings. The regarded robots are modeled as underactuated systems and controlled by input-output linearization. To ...
Optimierung von Kathoden und Zwischenschichten für Polymersolarzellen
(2010)
Diese Arbeit beschäftigt sich mit dem Einfluss der Kathode auf die Eigenschaften von Polymersolarzellen. Neben der Untersuchung verschiedener Abscheidearten liegt der Schwerpunkt vor allem auf der Erforschung der Wirkungsweise ...
Organic laser diodes: modelling and simulation
(2009)
This thesis analyzes the impact of various loss processes on the threshold current density of organic semiconductor laser diodes by numerical simulation. Design concepts based on organic double-heterostructures are evaluated ...
Performance Problem Diagnostics by Systematic Experimentation
(2018)
In this book, we introduce an automatic, experiment-based approach for performance problem diagnostics in enterprise software systems. The proposed approach systematically searches for root causes of detected performance ...
Organisation, Repräsentation und Analyse menschlicher Ganzkörperbewegung für die datengetriebene Bewegungsgenerierung bei humanoiden Robotern
(2017)
This work presents an approach to data-driven motion generation for humanoid robots, which is based on the observation and analysis of human whole-body motions. To this end, we investigate how captured human motions can ...
Parameter dependencies for reusable performance specifications of software components
(2008)
To avoid design-related performance problems, model-driven performance prediction methods analyse the response times, throughputs, and resource utilizations of software architectures before and during implementation. ...
Parameterisation of electromagnetic showers and search for large extra dimensions in pp collisions at s = 14 TeV
(2006)
The emission of dibenzofurans and dioxins from industrial processes is a major environmental concern. Focussing on dibenzofuran, this study tend to improve our understanding of the general oxidation chemistry and to provide ...
Parameteranalyse eines redundanten Roboters mit Pivotpunkt-Restriktion
(2017)
Nowadays robots are used not only in production lines, but also in the field of medicine. In this thesis an analysis was performed which relates to a serial, redundant robot and its parameters. The pivot point restriction ...
Path regularity for stochastic differential equations in Banach spaces
(2007)
In this work we analzyse the Stochastic Cauchy Problem driven by a cylindrical Wiener process. Given the existence of solutions we show regularity of the paths of the solution. In dependence on properties of the operators ...
A New Concept for Mobile Environmental Education
(2007)
The new concept for mobile environmental education extends the traditional media-based environmental interpretation by means of a mobile context-aware computer. This mobile nature guide system can assist its user during ...
New contributions to R-curves and bridging stresses - Applications of weight functions
(2012)
Most ceramics show an increase of the crack growth resistance during crack propagation (R-curve behaviour). Reasons for such behaviour are bridging effects between opposite crack surfaces, phase transformations around the ...
Materialklassifikation in optischen Inspektionssystemen mithilfe hyperspektraler Daten
(2014)
In this work, different methods for material classification by hyperspectral images in the near infrared range are investigated. Specifically, the design of problem-adapted camera systems and the choice of optimal optical ...
Measuring the Impact of Lean Techniques on Performance Indicators in Logistics Operations
(2013)
Several in-depth studies have verified the positive impact of lean techniques on performance indicators in production environments. Studies performed on warehouse environments have partially confirmed this. This thesis ...
Optische Oberflächensignalmessung mit Mikrolinsen-Detektoren für die Kleintierbildgebung
(2009)
Die vorliegende Arbeit zeigt, wie sich die optische Bildgebung kleiner Tiere platzeffizient mit flachen Mikrolinsen-Detektoren realisieren lässt. Als Grundlage der Bildberechnung dient ein hierfür entwickeltes Abbildungsmodell. ...
Optische Antennen aus Al und Au: Anregungskonzepte und Einfluss der Oxidation
(2016)
Optical antennas are metallic nanostructures showing a resonant behaviour which can be tuned at wish. In this work, optical antennas from aluminum and gold are fabricated, optically characterized and investigated numerically ...