Publications
Voici les éléments 1401-1440 de 2508
Ultrafast Dynamics of Metalloporphyrins, DNA and Iron-Lanthanide Clusters in the Liquid Phase
(2013)
Ultraschnelle Dynamik von verschiedenen organischen und anorganischen molekularen Systemen wurde unter Verwendung der zeitaufgelöste Anregungs-Abfrage-Technik in Kombination mit anderen spektroskopischen Methoden untersucht. ...
Ultraschnelle zeitaufgelöste Pump/Probe-Photoelektronenspektroskopie an isolierten und massenselektierten Anionen
(2006)
In der vorliegenden Arbeit wird die Anregungs/Abfrage-Photoelektronenspektroskopie auf die Untersuchung elektronischer Dynamik in massenselektierten Molekülionen unter Hochvakuum-Bedingungen angewendet, wodurch die Beobachtung ...
Ultrakurzzeitdynamik ausgewählter Germaniumcluster, mehrkerniger Seltenerdverbindungen sowie quasi monodisperser (9,7)-Kohlenstoffnanoröhren in Lösung
(2011)
In dieser Arbeit wurden mittels zeitaufgelöster Anregungs-Abfrage-Spektroskopie Untersuchungen zum Relaxationsverhalten eines neunkernigen Germaniumclusters, vierkerniger Lanthanoidkomplexe sowie einwandiger (9,7)-Kohlen ...
Ultrafast photophysics and photochemistry of radical precursors in solution
(2012)
The photoinduced dynamics of radical precursors in solution were investigated by means of femtosecond transient absorption spectroscopy assisted by quantum chemical calculations. The investigated systems show a wide range ...
Uncertainty handling in multi-attribute decision support for industrial risk management
(2008)
The complexity of today's industrial production networks constitutes a new challenge for industrial risk and safety management. In order to handle potential risks to and emanating from industry and their respective impact ...
Uncertainties in energy markets and their consideration in energy storage evaluation
(2013)
This book successfully illustrates the modeling of electricity prices with the help of stochastic processes. The relatively new phenomenon of negative prices is also integrated into the models. The integration of feed-in ...
Systemdesign im Market-Engineering - Experimente zu Teilnehmerverhalten und Technologieakzeptanz
(2008)
Elektronische Märkte haben in den letzten Jahren in vielen Bereichen auch des täglichen Lebens zunehmend an Bedeutung gewonnen. Um im Konkurrenzkampf bestehen zu können, sind die Anbieter elektronischer Marktplätze wie ...
Die Tagesschau-App und die Notwendigkeit der Schaffung eines ""Intermedienkollisionsrechts""
(2013)
The article takes up the example of online news-services to describe the overall purpose of Germany's public broadcasting corporation within the new networks of electronic media. It argues that the rise of the Internet is ...
Time-dependent spectrum analysis of high power gyrotrons
(2015)
In this work, a novel measurement system for the analysis of the gyrotron RF output spectrum was developed. It enables unprecedented time dependent measurements within a large bandwidth, dynamic range and unambiguous RF ...
Time-efficient Simulation of Surface-excited Guided Lamb Wave Propagation in Composites
(2012)
The methods of time-efficient simulation of surface-excited wave propagation in plate-like multilayered composites are presented. The mathematical model of wave propagation in laminated plate based on the elasticity theory ...
Tolerance Simulation in the Loop : Ansätze zur Verbesserung der Vorhersagegenauigkeit der Toleranzsimulation im Automobilbau durch Adaption an reale Fertigungsprozesse
(2019)
The dimensional accuracy in the body-in-white manufacturing process is analysed, basically confirming the simulation scope already in use. An enhanced prediction approach and a visualisation tool enable a precise and ...
Tool-supported identification of functional concerns in object-oriented code
(2010)
Concern identification aims to find the implementation of a functional concern in existing source code. In this work, concerns are described, using the Hierarchic Concern Model, as gray-boxes containing subconcerns, inputs, ...
Tourenplanung mit alternativen Lieferperioden und Teillieferungen
(2014)
This book examines the Vehicle-Routing-Problem with split-deliveries and alternative delivery periods (SDVRPA). It is solved with a Branch-and-Price-Algorithm. When alternative delivery periods and split-deliveries are ...
Tourenplanung für den eCommerce-Lebensmittel-Heimlieferservice
(2006)
In dieser Arbeit wird das praxisrelevante Problem der Tourenplanung im eCommerce-Lebensmittel-Heimlieferservice im Kontext transportlogistischer und betriebswirtschaftlicher Anforderungen untersucht. Ausgehend von der ...
Towards a rigorous fusion of GNSS and InSAR observations for the purpose of water vapor retrieval
(2014)
In the framework of the rigorous fusion of GNSS and InSAR observations, the presented work carries out at a straightforward comparison of the wet delay, caused by water vapor, derived from GNSS and InSAR. The contributions ...
Towards automated restructuring of object oriented systems
(2008)
The work introduces a method for diagnosing design flaws in object oriented systems, and finding meaningful refactorings to remove such flaws. The method is based on pairing up a structural pattern that is considered ...
Towards magnetic resonance in scanning tunneling microscopy using heterodyne detection
(2015)
The present work introduces a new concept for magnetic resonance measurements in the GHz regime inside a scanning tunneling microscope. It is based on heterodyne detection in a spin-polarized tunneling barrier. The ...
Tracking Extended Objects in Noisy Point Clouds with Application in Telepresence Systems
(2016)
We discuss theory and application of extended object tracking. This task is challenging as sensor noise prevents a correct association of the measurements to their sources on the object, the shape itself might be unknown ...
Tracking Extended Objects with Active Models and Negative Measurements
(2019)
Extended object tracking deals with estimating the shape and pose of an object based on noisy point measurements. This task is not straightforward, as we may be faced with scarce low-quality measurements, little a priori ...
Tragfähigkeit von Verbindungen mit selbstbohrenden Holzschrauben mit Vollgewinde
(2006)
Gegenwärtig stehen für den Holzbau selbstbohrende Vollgewindeschrauben mit Längen bis zu 600 mm und Durchmessern bis zu 12 mm zur Verfügung, die ohne Vorbohren und damit schnell und wirtschaftlich ins Holz eingedreht werden ...
Tragfähigkeit von stiftförmigen Verbindungsmitteln in Brettsperrholz
(2007)
Im Rahmen dieser Forschungsarbeit wurden Vorschläge zur Ermittlung der Tragfähigkeit von Verbindungen mit stiftförmigen Verbindungsmitteln in den Seiten- und Schmalflächen von Brettsperrholz erarbeitet. Die für die Berechnung ...
Tragverhalten von biegebeanspruchten Stahlmasten mit polygonalen Querschnitten
(2015)
This work deals with the bending moment capacity of thin-walled steel poles with polygonal sections. Based on experimental and numerical investigations the bearing behavior of steel poles in bending with polygonal sections ...
Transformation von Multiphysics-Modellen in einen FPGA-Entwurf für den echtzeitfähigen HiL-Test eingebetteter Systeme
(2013)
This work establishes an integrated tool chain from modeling physical simulations to design automation for FPGA-based real-time simulations. Modelica was chosen as a versatile, intuitive and object-oriented modeling language. ...
Transistor- und Leitungsmodellierung zum Entwurf von monolithisch integrierten Leistungsverstärkern für den hohen Millimeterwellen-Frequenzbereich
(2013)
The aim of this work is the design of monolithic integrated power amplifiers for frequencies from 200 to 250 GHz and beyond. For this, reliable and flexible transmission line and transistor models are required. The models ...
Transient behaviour of ITER poloidal field coils
(2011)
Transient voltages occur on the terminals of superconducting coils and may lead to internal over-voltages. The main objective of this work was to calculate the transient electrical behaviour and internal voltage distribution ...
Transport- und Umsatzprozesse bei der Abwasserversickerung aus undichten Kanälen
(2007)
Abwasserkanäle erleiden im Verlauf ihrer Nutzung Schäden durch Abnutzung, Alterung oder sonstige Einwirkung, die zu Undichtigkeiten führen können. Durch die Undichtigkeiten kann entweder unbelastetes Fremdwasser aus dem ...
Travel Time Models and Throughput Analysis of Dual Load Handling Automated Storage and Retrieval Systems in Double Deep Storage
(2018)
A general analytical travel time model for the quadruple command cycle in double deep storage systems with a dual capacity load handling device is formulated and validated by means of a simulation model. Various routing ...
Treatment of phenolic wastewater in suspended and fixed bed bioreactors
(2009)
Phenol and chlorophenols are among the most important class of raw materials in chemical industry. These compounds also list among priority pollutants. The main problem in treating phenol or chlorophenol containing wastewater ...
Neue Methode zur Bestimmung und Beschreibung der taktfrequenten Stromsteigungen in Drehstromsynchronmaschinen
(2022)
Knowledge of the cycle-frequency changes in the machine currents is of great advantage for many methods of controlling modern, highly utilized electrical machines. But how can these changes in machine currents be reliably ...
Design of Cast Steel Components under Cyclic Loading
(2022)
This work presents a design approach that links fatigue resistance of cast steel component to permissible defect sizes. It is based on fractures mechanics, is in line with experiences of the last 60 years and validated by ...
Chip-scale optical frequency comb sources for terabit communications
(2022)
To keep up with the ever-increasing data transmission speed needs, data center interconnects are scaling up to provide multi-Tbit/s connectivity. These links require a high number of WDM channels, while the associated ...
Objektivierung des Schwingungskomforts schwerer Nutzfahrzeuge
(2021)
A time efficient development process of new trucks includes an early development of ride comfort before real prototypes exist. Therefore it is necessary to determine objective and measurable characteristic values to predict ...
Entwicklung einer Kontinuumsbeschreibung für die Versetzungsmobilität in Versetzungsnetzwerken
(2020)
This work deals with the homogenization of dislocation reactions across slip systems in a physically based three-dimensional formulation of metal plasticity. Based on comparisons with discrete dislocation dynamics simulations, ...
Zur Geschichte der Reedereigebaude an der Elbstrase bei der Alten Liebe in Cuxhaven seit den 1920er Jahren
(2020)
This study will discuss the history of the creation, construction and use of three distinctive shipping company villas in the harbour of Cuxhaven/Germany, located south of the harbours lighthouse, near the Alte Liebe”. The ...
Modellierung und Optimierung der strömungstechnischen Vorgänge in Abweiseradsichtern
(2022)
Centrifugal classifiers are processing machines used in the gas-particle classification. The aim of this work is to reduce energy costs by improving the classification properties and reducing the pressure drop. In addition ...
Integrierte planare Antennen für supraleitende Detektorsysteme zur THz-Strahldiagnostik
(2022)
In the THz frequency range, superconducting detectors coupled to planar antennas are well suited for the use in the field of accelerator beam diagnostics. This work studies the coupling efficiency and spectral sensitivity ...
Optical coherence tomography for characterization of nanocomposite materials
(2021)
Major challenges in nanoparticle and nanocomposite development are the control of particle size and shape, and to achieve uniform particle dispersion. In this book, the application of optical coherence tomography (OCT) for ...
Untersuchung der Augensicherheit durch Multi-Pulsbestrahlung für LiDAR-Anwendungen
(2022)
LiDAR (Light detection and ranging) represents one of the key technologies for autonomous driving. For this reason, this work is concerned with the question of eye safety of the laser-based technology. For this purpose, ...
Bildfolgenbasierte Gewinnung und Nutzung partikelindividueller Bewegungsinformation in der optischen Schüttgutsortierung
(2022)
Sensor-based sorting enables the separation of individual particles from a material stream. In this work, a novel sorting system using an area-scan camera is investigated. The use of high-speed cameras raises exciting ...
Biegefestigkeit von Trägern aus kreissektorförmigen Lamellen
(2022)
Laminated Segment Timber (LST) consists of mutually glued trapezoidal lamellas made of Spruce. Due to the optimization of process parameters the wood yield can be increased to an average of 85 %. LST and layered LST are ...