Publications
Now showing items 1041-1120 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 ...
Organische Nanopartikel zum Aufbau photoaktiver Schichten Organischer Solarzellen
(2017)
Nanoparticle dispersions were used to fabricate photoactive layers of organic solar cells from water or ethanol. By using a precipitation method the power conversion efficiencies of the nanoparticulate solar cells were ...
Organische Halbleiterbauelemente für mikrooptische Systeme
(2007)
Diese Arbeit befasst sich mit neuen Aspekten der Nutzung der Klasse der organischen Halbleiterbauelemente. Es wird dabei insbesondere die Integration organischer Bauelemente in mikrooptische Systeme untersucht. Dabei stehen ...
Photonic Wire Bonding as a Novel Technology for Photonic Chip Interfaces
(2018)
To create photonic multi-chip modules, integrated photonic chips need to be connected internally and to external glass fibers. A novel approach to address this task is the concept of photonic wire bonding, where free-standing ...
Photon upconversion heterostructures made from surface-anchored metal-organic frameworks
(2019)
This work deals with the process of photon upconversion in surface-anchored metal-organic frameworks. During the upconversion, two low-energy photons are absorbed and fused into a higher-energy photon, which is emitted. ...
Photonic crystal slabs for low-cost biosensors
(2010)
Biosensors are devices that utilize biological recognition elements to selectively detect and analyze specific biological and chemical analyte substances. In this work a technology platform for label-free optical biosensors ...
Nitrification in Fixed Bed Reactors Treating Saline Wastewater
(2011)
Two fixed bed reactors for nitrification with either polyethylene/clay sinter lamellas (FBR A) or porous ceramic rings (FBR B) were continously run for treating synthetic saline wastewater. Seawater from Hafen Büsum was ...
Die Notebook-Universität Karlsruhe (TH) NUKATH
(2004)
Neue Wege in der Lehre und Forschung an deutschen Hochschulen:Die Universität Karlsruhe (TH) entwickelte, erprobte und evaluierte Wege und Instrumente zur Verbesserung der Qualität mobilen und multimediagestützten Lebens, ...
A novel micro-mechanical model for prediction of multiaxial high cycle fatigue at small scales
(2017)
The grain microstructure and damage mechanisms at the grain level are the key factors that influence fatigue of metals at small scales. This is addressed in this work by establishing a new micro-mechanical model for ...
Novel MRI Technologies for Structural and Functional Imaging of Tissues with Ultra-short T? Values
(2017)
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 ...
Optische und mechanische Messungen von elektrophysiologischen Vorgängen im Myokardgewebe
(2008)
Die vorliegende Arbeit befasst sich mit der optischen Erfassung von elektrischen Signalen im Herzen, welche eine kontaktlose Messung der elektrischen Signale von der Herzoberfläche ermöglicht. Hieraus lassen sich ...
Personalised body counter calibration using anthropometric parameters
(2014)
This book describes the development of a new method for personalisation of efficiency factors in partial body counting. Its achieved goal is the quantification of uncertainties in those factors due to variation in anatomy ...
Oxidation von Isobutan und Isobuten zu Methacrolein an einem neuen Mo-basierten Mischoxid-Katalysator
(2019)
In the present work kinetic experiments addressing the oxidation of isobutene and isobutene to methacrolein over a new Mo-based mixed oxide catalyst are presented. The experiments focus on the one hand on the synthesis of ...
Palm theory, mass transports and ergodic theory for group-stationary processes
(2011)
This work is about random measures stationary with respect to a possibly non-transitive group action. It contains chapters on Palm Theory, the Mass-Transport Principle and Ergodic Theory for such random measures. The thesis ...
Die partielle Oxidation von Propan zu Acrylsäure. Bestimmung der Reaktionskinetik und in-situ Charakterisierung des Katalysators unter Betriebsbedingungen
(2004)
Gegenstand der vorliegenden Arbeit ist die partielle einstufige Oxidation von Propan zu Acrylsäure an einem oxidischen Multikomponentenkatalysator mit der Zusammensetzung Mo1V0,33Nb0,17Te0,25Ox. In der vorliegenden Arbeit ...
Partielle Oxidation von o-Xylol zu Phthalsäureanhydrid : Keramische Schwämme als alternative Trägerstrukturen
(2008)
Gegenstand der vorliegenden Arbeit war die Abschätzung des Potentials keramischer Schwämme als Katalysatorträger. Die dafür notwendigen Untersuchungen wurden mittels der partiellen Oxidation von o-Xylol zu Phthalsäureanhydrid ...
Partikeldetektion in mikrofluidischen Systemen
(2015)
Analysis of microparticles is an important tool in medicine, biology and chemistry. In order to address future application areas, new systems will be produced by printing technology. In this work new microfluidic particle ...
Physics-Based Probabilistic Motion Compensation of Elastically Deformable Objects
(2012)
A predictive tracking approach and a novel method for visual motion compensation are introduced, which accurately reconstruct and compensate the deformation of the elastic object, even in the case of complete measurement ...
Piezoelektrische Self-sensing-Aktoren zur Korrektur statischer Verlagerungen
(2008)
In Kombination mit dem Funktionsprinzip einer Schwingsaitenwaage können piezoelektrische Wandler im Bereich kleiner Frequenzen gleichzeitig sensorisch und aktorisch betrieben werden. In der vorliegenden Arbeit werden ...
Novel Aggregated Solutions for Robust Visual Tracking in Traf?c Scenarios
(2019)
This work proposes novel approaches for object tracking in challenging scenarios like severe occlusion, deteriorated vision and long range multi-object reidenti?cation. All these solutions are only based on image sequence ...
Online-Abschätzung der Rammguttragfähigkeit beim langsamen Vibrationsrammen in nichtbindigen Böden
(2009)
Es wird ein Verfahren vorgestellt, das die Abschätzung der Rammguttragfähigkeit beim Vibrationsrammen während des Rammprozesses ermöglicht. In Labor- und Feldversuchen wurden neben den üblichen Vibrationsrammparametern die ...
Online-Identifikation fraktionaler Impedanzmodelle für die Hochtemperaturbrennstoffzelle SOFC
(2008)
In dieser Arbeit wird ein Verfahren entwickelt, das die Online-Schätzung fraktionaler Impedanzmodelle im Zeitbereich ermöglicht. Hierzu wird ein neuartiges Verfahren vorgestellt, welches die Beschreibung der Impedanz durch ...
Optically Powered Highly Energy-efficient Sensor Networks
(2013)
In optically powered networks, both, communication signals and power for remotely located sensor nodes, are transmitted over an optical fiber. Key features of optically powered networks are node operation without local ...
An Optical Grooming Switch for High-Speed Traffic Aggregation in Time, Space and Wavelength
(2010)
In this book a novel optical switch is designed, developed, and tested. The switch integrates optical switching, transparent traffic aggregation/grooming, and optical regener-ation. Innovative switch subsystems are developed ...
Organisation der Bauproduktion nach dem Vorbild industrieller Produktionssysteme : Entwicklung eines Gestaltungsmodells eines Ganzheitlichen Produktionssystems für den Bauunternehmer
(2009)
Im Bauwesen wurde Mitte der 90er Jahre begonnen, singuläre Gestaltungsprinzipien und Methoden der Lean Production zu adaptieren sowie neue bauspezifische Methoden zu entwickeln (Lean Construction). In der vorliegenden ...
Organic Semiconductor Lasers and Tailored Nanostructures for Raman Spectroscopy
(2015)
This work presents the application of organic semiconductor distributed feedback laser as free-space excitation source in Raman spectroscopy. Surface-enhanced Raman scattering effect is exploited to improve the detection ...
Organic Service-Level Management in Service-Oriented Environments
(2011)
Dynamic service-oriented environments (SOEs) are characterised by a large number of heterogeneous service components that are expected to support the business as a whole. The present work provides a negotiation-based ...
Organic traffic control
(2011)
Modern cities cannot be imagined without traffic lights controlling the road network. To handle the network's changing demands efficiently, the signal plan specification needs to be shifted from the design time to the ...
Organic Smart Home - Energiemanagement für Intelligente Gebäude
(2013)
The Organic Smart Home is a generic framework as well as a runtime environment for the application in real smart homes to cope with the challenges of a flexible and adaptive energy management system.
Policy-based Contracting in Semantic Web Service Markets
(2007)
This book presents an interdisciplinary approach drawing from the fields of computer science, economics, and law to realize dynamic and flexible Web service markets. It thereby addresses technical issues such as the ...
Qualification of the airborne FTIR spectrometer MIPAS-STR and study on denitrification and chlorine deactivation in Arctic winter 2009/10
(2013)
This work describes the qualification of the airborne Fourier-Transform infrared spectrometer Michelson Interferometer for Passive Atmospheric Sounding-STRatospheric aircraft (MIPAS-STR) and studies on ozone-relevant ...
Qualitätsorientierter Entwurf von Anwendungsdiensten
(2011)
Um die mit dienstorientierten Architekturen verknüpften Ziele wie bspw. eine höhere Flexibilität erreichen zu können, wird von Diensten die Einhaltung bestimmter Qualitätseigenschaften wie bspw. loser Kopplung oder Autonomie ...
Quantum simulation experiments with superconducting circuits
(2018)
While the universal quantum computer seems not in reach for the near future, this work focusses on analog quantum simulation of intriguing quantum models of light-matter interactions, with the goal of achieving a computational ...
Ranking for Web Data Search Using On-The-Fly Data Integration
(2014)
Ranking - the algorithmic decision on how relevant an information artifact is for a given information need and the sorting of artifacts by their concluded relevancy - is an integral part of every search engine. In this ...
Die Reaktionskinetik des Gipsabbindens: Makroskopische Reaktionsraten und Mechanismen in molekularem Maßstab
(2005)
Das Gipsabbinden setzt sich in molekularem Maßstab aus drei Teilschritten zusammen: Auflösung des Halbhydrats (CaSO4 · 0.5 H2O, Bassanit) sowie Keimbildung und Kristallwachstum des Dihydrats (CaSO4 · 2 H2O, Gips). Eine ...
Real-time Digital Signal Processing for Software-defined Optical Transmitters and Receivers
(2014)
A software-defined optical Tx is designed and demonstrated generating signals with various formats and pulse-shapes in real-time. Special pulse-shapes such as OFDM or Nyquist signaling were utilized resulting in a highly ...
Real-time imaging systems for superconducting nanowire single-photon detector arrays
(2014)
Superconducting nanowire singe-photon detectors (SNSPD) are promising detectors in the field of applications, where single-photon resolution is required like in quantum optics, spectroscopy or astronomy. These cryogenic ...
Reaktionskinetische Untersuchungen zur Umwandlung stickstoffhaltiger Gaskomponenten unter Bedingungen der Abfallverbrennung
(2010)
Die vorliegende Arbeit stellt einen detaillierten Reaktionsmechanismus zur Verfügung, der die Stickstoffoxidbildung aus brennstoffgebundenem Stickstoff in der Gasphase unter Bedingungen der Abfallverbrennung beschreiben ...
Real-time Biomechanical Modeling for Intraoperative Soft Tissue Registration
(2015)
Computer assisted surgery systems intraoperatively support the surgeon by providing information on the location of hidden risk and target structures during surgery. However, soft tissue deformations make intraoperative ...
Proliferation-Proof Uranium/Plutonium Fuel Cycles: Safeguards and Non-Proliferation
(2011)
After description of the uranium / plutonium fuel cycle results are reported for various isotopic compositions of reactor-grade plutonium for usability in hypothetical nuclear explosive devices. It is shown that it is ...
Possibly imperfect ontologies for effective information retrieval
(2007)
Ontologies and semantic metadata can theoretically solve all problems of traditional full-text search engines. In practice, however, they are always imperfect. This work analyzed whether the negative effect of ontology ...