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  • Books  (60)
  • E-Books: Directory of Open Access Books (DOAB)  (60)
  • thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering  (45)
  • thema EDItEUR::P Mathematics and Science::PN Chemistry  (15)
  • KIT Scientific Publishing  (60)
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  • Washington, DC : United States Gov. Print. Off.
  • English  (60)
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  • Books  (60)
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  • E-Books: Directory of Open Access Books (DOAB)  (60)
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  • English  (60)
  • French
  • Japanese
  • German  (72)
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  • 1
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    Transactive Control of Coupled Electric Power and District Heating Networks (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: The design of approaches for future market-based energy network operation faces the technical challenge of needing to coordinate a vast number of network participants spatially and temporally, in order to balance energy supply and demand, while achieving secure network operation. To meet this challenge, the research field of transactive control emerged. Within this work a new transactive control approach for coupled electric power and district heating networks is presented.
    Keywords: Transactive Control; Wärmenetze; Stromnetze; Sektorenkopplung; Energiemärkte; District Heating Networks; Electric Power Networks; Energy Markets ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 2
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    Machine Learning for Camera-Based Monitoring of Laser Welding Processes (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: The increasing use of automated laser welding processes causes high demands on process monitoring. This work demonstrates methods that use a camera mounted on the focussing optics to perform pre-, in-, and post-process monitoring of welding processes. The implementation uses machine learning methods. All algorithms consider the integration into industrial processes. These challenges include a small database, limited industrial manufacturing inference hardware, and user acceptance.
    Keywords: CNN; stacked dilated U-Net; semantic segmentation; hairpin technology; laser welding; quality assurance; machine learning; Qualitätssicherung; semantische Segmentierung; Hairpin Technologie; Laserschweißen; Maschinelles Lernen; Künstliche Intelligenz ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 3
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    Proceedings of the International Workshop on Medical Ultrasound Tomography: 14.-15. Oct. 2019, Wayne State University, Detroit, Michigan, USA (2023)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Ultrasound Tomography is an emerging technology for medical imaging that is quickly approaching its clinical utility. Research groups around the globe are engaged in research spanning from theory to practical applications. The International Workshop on Medical Ultrasound Tomography 2019 brought together scientists to exchange their knowledge and discuss new ideas and results in order to boost the research in Ultrasound Tomography.
    Keywords: Ultraschall Tomographie ; Medizinische Bildgebung ; Ultrasound Tomography ; Medical Imaging ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 4
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    Multi-User Gesture Recognition with Radar Technology (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: The aim of this work is the development of a Radar system for consumer applications. It is capable of tracking multiple people in a room and offers a touchless human-machine interface for purposes that range from entertainment to hygiene.
    Keywords: Radar; FMCW; Gestenerkennung; Tracking; gesture recognition; tracking ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 5
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    Dynamic Incentives for Optimal Control of Competitive Power Systems (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work presents a real-time dynamic pricing framework for future electricity markets. Deduced by first-principles analysis of physical, economic, and communication constraints within the power system, the proposed feedback control mechanism ensures both closed-loop system stability and economic efficiency at any given time. The resulting price signals are able to incentivize competitive market participants to eliminate spatio-temporal shortages in power supply quickly and purposively.
    Keywords: Strommarkt; Dynamische Optimierung; Spieltheorie; Nichtlinearer Reglerentwurf; Mathematische Modellbildung; Electricity Market; Dynamic Optimization; Game Theory; Nonlinear Control; Mathematical Modeling ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 6
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    A First 2 MW-Class (136)/170/204 GHz Multi-Frequency Gyrotron Pre-Prototype for DEMO: Design, Construction and Key Components Verification (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: A gyrotron is used in magnetically confined plasma experiments for heating, current drive, plasma stabilization and plasma diagnostics. This work presents the first design and construction of a multi-frequency / multi-purpose coaxial-cavity pre-prototype gyrotron operating at (136)/170/204 GHz with an output power of 2 MW. It is the first step towards operating frequencies up to 240 GHz using the coaxial-cavity gyrotron technology.
    Keywords: mode generator; multi-frequency operation; electron vacuum tube; gyrotron; nuclear fusion; Modenerzeuger; Mehrfrequenzbetrieb; Vakuumröhre; Gyrotron; Kernfusion ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 7
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    Integration of Flywheel Energy Storage Systems in Low Voltage Distribution Grids (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: A Flywheel Energy Storage System (FESS) can rapidly inject or absorb high amounts of active power in order to support the grid, following abrupt changes in the generation or in the demand, with no concern over its lifetime. The work presented in this book studies the grid integration of a high-speed FESS in low voltage distribution grids from several perspectives, including optimal allocation, sizing, modeling, real-time simulation, and Power Hardware-in-the-Loop testing.
    Keywords: Schwungräder; Energiespeicher; Echtzeitsimulation; Power Hardware-in-the-Loop-Tests; Flywheels; Energy Storage; Real-time Simulation; Power Hardware-in-the-Loop Testing ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 8
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    Development of high-temperature superconductor cables for high direct current applications (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: A design process for HTS DC cables was developed for high current applications. Based on the design process, a 35 kA HTS DC cable demonstrator was developed. The superconducting elements of the demonstrator were manufactured and tested individually at 77 K. Afterwards, the demonstrator cable was assembled and tested at 77 K. The assembled demonstrator successfully reached 35 kA at 77 K and self field conditions.
    Keywords: Supraleitung ; Hochtemperatur Supraleitung ; Hochtemperatur Supraleiter Kabel ; Hochtemperatur Supraleiter Stromschiene ; High temperature superconductors ; high temperature superconducting cable ; HTS cable ; high temperature superconducting bus bar ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 9
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    Chip-scale optical frequency comb sources for terabit communications (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 transceivers should be compact and energy efficient. Scaling the number of channels, however, is still limited by the lack of adequate optical sources. In this book, we investigate novel chip-scale frequency comb generators as multi-wavelength light sources for Tbit/s WDM links.
    Keywords: Frequenzkämme; Modengekoppelte Laserdioden; Mikroresonator Solitonen; kohärente Terabit-Kommunikation; integrierte Photonik; frequency combs; Mode-locked laser diodes; microresonator solitons; coherent terabit communications; integrated photonics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 10
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    Energy-efficient, scalable and modular industrial microwave applicator for high temperature alkaline hydrolysis of PET (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Microwave-assisted alkaline hydrolysis of PET can be 20 times faster and at lower temperatures. This work presents a novel industrial microwave applicator at 2.45 GHz with homogeneous distribution to support this reaction, which allows an efficient and continuous operation. In addition, an innovative dielectric and calorimetric measurements setup is presented. Furthermore, the modelling of the reaction kinetics based on the measured dielectric parameters is presented.
    Keywords: Mikrowellen; dielektrische Messungen; industrieller Maßstab; alkalische Hydrolyse von PET; microwaves; dielectric measurements; industrial scale; alkaline hydrolysis of PET ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 11
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    Fluorescent thermal imaging method for investigating transient effects in high-temperature superconductor tapes and coils (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work presents the development and application of high-speed fluorescent thermal imaging for quench analysis in high-temperature superconductors (HTS). Using a fluorescent coating, with a temperature-dependent light emission, temperature changes can be calculated over 2D surfaces. The technique uncovered peculiar transient effects in novel HTS tape architectures and also helped to verify and better understand hot spot development in both insulated and non-insulated, HTS–wound pancake coils.
    Keywords: Supraleiter ; Hochtemperatursupraleiter ; Wärmeaufnahme ; Quench ; superconductivity ; high-temperature superconductors ; thermal imaging ; quench ; normal zone propagation ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 12
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    Probabilistic Models and Inference for Multi-View People Detection in Overlapping Depth Images (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: In this work, the task of wide-area indoor people detection in a network of depth sensors is examined. In particular, we investigate how the redundant and complementary multi-view information, including the temporal context, can be jointly leveraged to improve the detection performance. We recast the problem of multi-view people detection in overlapping depth images as an inverse problem and present a generative probabilistic framework to jointly exploit the temporal multi-view image evidence.
    Keywords: probabilistische Personendetektion ; Netzwerk von 3D-Sensoren ; Tiefenbilder ; inverses Problem ; joint multi-view person detection ; depth sensor indoor surveillance ; mean-field variational inference ; vertical top-view indoor pedestrian detection ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 13
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    Optimal Scheduling of Combined Heat and Power Generation Considering Heating Grid Dynamics (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: As the share of renewable generation increases in electric grids, the traditionally heat driven operation of combined heat and power plants (CHPs) reaches its limits. Thermal storage is required for a flexible operation of CHPs. This work proposes three novel methods to use a heating grid as thermal storage by exploiting its thermal dynamics. These include the first approach proving global optimality, a novel linear formulation of grid dynamics and an easily real world applicable approach.
    Keywords: Fernwärme ; thermische Speicher ; variablenabhängige Verzögerung ; optimale Einsatzplanung ; gemischtganzzahlige Optimierung ; district heating ; thermal storage ; variable dependent time delay ; optimal unit commitment ; mixed integer programming ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 14
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    Implementation and application of the explicitly correlated coupled-cluster method in Turbomole (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-05
    Description: In this thesis the implementation of the explicitly correlated coupled-cluster singles-and-doubles model is presented. This tool is capable of efficiently calculating CCSD energies at the basis set limit with relatively small orbital basis sets. The implementation supports RHF, UHF and ROHF reference wave functions. The usefulness of the developed tool is illustrated with selected chemical applications.
    Keywords: QD1-999 ; coupled-cluster theory ; explicit correlation ; transition-state theory ; CCSD ; thema EDItEUR::P Mathematics and Science::PN Chemistry
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  • 15
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    Self-Learning Longitudinal Control for On-Road Vehicles (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Reinforcement Learning is a promising tool to automate controller tuning. However, significant extensions are required for real-world applications to enable fast and robust learning. This work proposes several additions to the state of the art and proves their capability in a series of real world experiments.
    Keywords: Regelungstechnik; Künstliche Intelligenz; Fahrzeugregelung; Längsdynamik; Bestärkendes Lernen; Control Theory; Artificial Intelligence; Vehicle Control; Longitudinal Dynamics; Reinforcement Learning ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 16
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    State-of-the-Art of High-Power Gyro-Devices (2024)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This report presents an update of the experimental achievements published in the review “State- of-the-Art of High-Power Gyro-Devices and Free Electron Masers”, Journal of Infrared, Millimeter, and Terahertz Waves, 41, No. 1, pp 1-140 (2020) and in the KIT Scientific Report 7761 (2021), related to the development of gyro-devices (Tables 2-34). Emphasis is on high-power gyrotron oscillators for long-pulse or continuous wave (CW) operation and pulsed gyrotrons for any applications.
    Keywords: Dielectric Vacuum Windows; Gyro-Amplifier; Gyro-BWO; Gyrotron-Oscillator; Dielektrische Vakuumfenster; CARM; Gyro-Verstärker; Gyro-RWO; Gyrotron-Oszillator ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 17
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    On the diverse bonding situations in nanostructures : an ab initio computational study (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-05
    Description: This computational study investigates diverse bonding situations in nanostructures (carbon nanotubes, fullerenes, metal compounds) spanning a broad range of energies. Weak, dispersive interactions and covalent metal-ligand and metal-metal bonding are examined. The results of efficient density functional calculations are compared to those of correlated wavefunction calculations on model systems. This rigorous validation is crucial in evaluating the balance between computational cost and accuracy.
    Keywords: QD1-999 ; open-cage fullerenes ; single-walled carbon nanotubes ; subvalent aluminium and magnesium compounds ; computational chemistry ; nanostructures ; thema EDItEUR::P Mathematics and Science::PN Chemistry
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  • 18
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    Modeling Backscattering Behavior of Vulnerable Road Users Based on High-Resolution Radar Measurements (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: During the evolvement of autonomous driving technology, obtaining reliable 3-D environmental information is an indispensable task in approaching safe driving. The operational behavior of automotive radars can be precisely evaluated in a virtual test environment by modeling its surrounding, specifically vulnerable road users (VRUs). Such a realistic model can be generated based on the radar cross section (RCS) and Doppler signatures of a VRU. Therefore, this work proposes a high-resolution RCS measurement technique to determine the relevant scattering points of different VRUs.
    Keywords: RCSmodeling of extended targets; range-Doppler; radar high-resolution measurement; Human body radar cross section (RCS) measurement; RCS-Modellierung von ausgedehnten Ziel; Entfernungs-Doppler; hochauflösende Radarmessung; Messung des Radarquerschnitts (RCS) des menschlichen Körpers ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 19
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    Ultrafast Dynamics of Metalloporphyrins, DNA and Iron-Lanthanide Clusters in the Liquid Phase (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-05
    Description: Ultraschnelle Dynamik von verschiedenen organischen und anorganischen molekularen Systemen wurde unter Verwendung der zeitaufgelöste Anregungs-Abfrage-Technik in Kombination mit anderen spektroskopischen Methoden untersucht. Diese Dynamik umfasst, z.B. die Relaxationsprozesse in Metalloporphyrins, die Ladungstransfer zwischen Donor und Akzeptor durch DANN-Doppelhelix sowie die Dynamik von Ladungsträger in anorganischen nanostrukturierten zyklischen koordinierten Eisen-Lanthanoide Clustern.
    Keywords: QD1-999 ; Lanthanide ; Femtosecond Spectroscopy ; DNA ; Metalloporphyrin ; Ultrafast Dynamics ; thema EDItEUR::P Mathematics and Science::PN Chemistry
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  • 20
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    Ultrafast photophysics and photochemistry of radical precursors in solution (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-05
    Description: 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 of excited state lifetimes ranging from tens of femtoseconds to nanoseconds. Thus, in the first case, on the investigated time scale the dynamics of the generated radicals can be additionally investigated. In the latter case only the excited singlet lifetime is observable.
    Keywords: QD1-999 ; femtosecond spectroscopy ; radical ; photolysis ; thema EDItEUR::P Mathematics and Science::PN Chemistry
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  • 21
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    Integrated optical sensors on the Si₃N₄-organic hybrid (SiNOH) platform (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: A waveguide-based sensor chip is demonstrated that is suitable for point-of-care applications. The biosensor is designed using a mathematical model to investigate the sensitivity of the waveguides. A new class of integrated laser sources for visible wavelengths is being investigated for the first time for light coupling into the waveguides. The functionality of the waveguide-based biosensor chip is successfully demonstrated by detection experiments.
    Keywords: Sensorik; integrierte Laser; organische Laser; photonische Wellenleiter; patientennahe Labordiagnostik; Sensors; integrated lasers; organnic lasers; photonic waveguides; point-of-care diagnostics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 22
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    Technology Entrepreneurship : A Treatise on Entrepreneurs and Entrepreneurship for and in Technology Ventures. Band 2 (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-05
    Description: The treatise is the first coherent and comprehensive presentation of the important sub-field of ""technology entrepreneurship"" emphasizing the science and engineering perspectives. It is a presentation of technology entrepreneurship as an inter-cultural approach referring to the US and Germany. It integrates micro- and macro aspects referring to numerous cases of firms' foundations. The book provides also a new semi-quantitative approach to growth of new technology ventures.
    Keywords: QD1-999 ; Unternehmertum ; Unternehmer ; Technology ; Entrepreneurship ; Science ; Firmengründungen ; TechnikEntrepreneurs ; Firms' Foundations ; Wissenschaft ; thema EDItEUR::P Mathematics and Science::PN Chemistry
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  • 23
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    A Multiscale In Silico Study to Characterize the Atrial Electrical Activity of Patients With Atrial Fibrillation (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: The atrial substrate undergoes electrical and structural remodeling during atrial fibrillation. Detailed multiscale models were used to study the effect of structural remodeling induced at the cellular and tissue levels. Simulated electrograms were used to train a machine-learning algorithm to characterize the substrate. Also, wave propagation direction was tracked from unannotated electrograms. In conclusion, in silico experiments provide insight into electrograms' information of the substrate.
    Keywords: Vorhofflimmern ; Fibrose ; maschinelles Lernen ; Bidomain ; Modellierung des Herzens ; atrial fibrillation ; fibrosis ; machine learning ; bidomain ; cardiac modeling ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 24
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    A detailed approach to model transport, heterogeneous chemistry, and electrochemistry in solid-oxide fuel cells (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-05
    Description: This book lays out a numerical framework for the detailed description of heterogeneous chemistry, electrochemistry and porous media transport in solid-oxide fuel cells (SOFC). Assuming hydrogen as the only electrochemically active species, a modified Butler-Volmer equation is used to model the electrochemical charge transfer.
    Keywords: QD1-999 ; Elektrochemie ; thema EDItEUR::P Mathematics and Science::PN Chemistry
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  • 25
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    Dynamical Modeling and Control of Multiphase Heat Transport Systems Based on Loop Heat Pipes (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Effective heat transport systems in aerospace are based on multiphase loop heat pipes (LHPs). For a precise thermal control of the electronics, electrical heaters are additionally used to control the operating temperature of the LHP. This work focusses on the dynamical modeling and model-based control design for LHP-based heat transport systems. The results of this work can be used for the optimization of current control parameters and the efficient control design for future LHP applications.
    Keywords: Dynamische Modellierung; Wärmetransportsystem; Loop Heat Pipe; Nichtlineare Regelung; dynamical modeling; heat transport system; loop heat pipe; nonlinear control ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 26
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    Reconstruction from Spatio-Spectrally Coded Multispectral Light Fields (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: In this work, spatio-spectrally coded multispectral light fields, as taken by a light field camera with a spectrally coded microlens array, are investigated. For the reconstruction of the coded light fields, two methods, one based on the principles of compressed sensing and one deep learning approach, are developed. Using novel synthetic as well as a real-world datasets, the proposed reconstruction approaches are evaluated in detail.
    Keywords: Computer Vision; Lichtfelder; Multispektrale Bildgebung; Compressed Sensing; Deep Learning; computer vision; light fields; multispectral imaging; compressed sensing; deep learning ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 27
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    Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix [online] (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-05
    Description: The investigation of the interfacial phase transitions in fluid systems with short-range intermetallic interactions are of great interest. The phenomena were studied in two systems exhibiting a liquid-liquid miscibility gap: at the fluid/wall interface in fluid KxKCl1-x and at the fluid/vacuum interface of the Ga1 xBix alloys. To characterize the interfacial changes of the ultra thin films (composition, thickness and their evolution with time) the spectroscopic ellipsometry was performed over a wide spectral range. Whereas in the experiments on KxKCl1-x an existing ellipsometer could be used, a completely new UHV-apparatus including the in-situ phase modulation ellipsometer had to be developed for Ga1 xBix alloys. For the KxKCl1-x system new results on complete wetting at solid-liquid coexistence as well as in the homogenous liquid phase (prewetting) are presented. The spectra show the typical F center absorption which indicates that the film is a salt-rich phase. The thickness strongly increases approaching the monotectic from 30 to 440 nm, which is in agreement with the tetra point wetting scenario. For this interpretation a quantitative description of the excess Gibbs energy has been developed. For the Ga1 xBix system the results on complete wetting, surface freezing and oscillatory interfacial instabilities are presented. The high-precision spectra have been recorded approaching the liquid-liquid miscibility. These spectra have been modeled using a Ga-Bi effective medium approximation for the substrate covered by a film of liquid Bi. The measurements give evidence of tetra point wetting in the Ga-Bi system. First ellipsometric study of the surface freezing in Ga-Bi has been performed. Within the miscibility gap a very interesting effect of surface and bulk oscillatory instability was observed. The details of this process at present are not well understood, but a qualitative description is given.
    Keywords: QD1-999 ; molten salt ; surface phase transition ; spectroscopic ellipsometry ; Ga-Bi alloys ; thema EDItEUR::P Mathematics and Science::PN Chemistry
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  • 28
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    Optical coherence tomography for characterization of nanocomposite materials (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: 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 nanocomposite and nanoparticle characterization is investigated. Industrial requirements are robustness, small system cost and size, and an open path towards parallelization. We design and investigate silicon photonic integrated OCT systems that comply with these requirements.
    Keywords: Optische Messtechnik ; Optische Kohärenztomographie ; Nanoverbundmaterialien ; Nanopartikel ; Siliziumphotonik ; optical metrology ; optical coherence tomography ; nanocomposite materials ; nanoparticles ; silicon photonics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Human-Machine Cooperative Decision Making (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: The research reported in this thesis focuses on the decision making aspect of human-machine cooperation and reveals new insights from theoretical modeling to experimental evaluations: Two mathematical behavior models of two emancipated cooperation partners in a cooperative decision making process are introduced. The model-based automation designs are experimentally evaluated and thereby demonstrate their benefits compared to state-of-the-art approaches.
    Keywords: Mensch-Maschine-Interaktion; Mensch-Maschine-Kooperation; Mensch-Maschine-Systemdesign; Kooperative Entscheidungsfindung; Entscheidungsfindung; Human-Machine Interaction; Human-Machine Cooperation; Human-Machine System Design; Cooperative Decision Making; Decision Making ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Intelligent Reflecting Surfaces in Wireless Communication Systems (2024)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Accompanied with the development of the wireless communication technologies, the high data traffic is more necessary for civil and industrial applications than ever The concept of an intelligent reflective surface (IRS) has attracted considerable attention recently as a low-cost solution. As the main contribution, the dissertation creates new state-of-the-art and formulates a solid milestone for the IRS research field.
    Keywords: Signal Processing; Communication Systems; Wireless Communication; Intelligent Reflecting Surface; Signalverarbeitung; Kommunikationssysteme; drahtlose Kommunikation; Intelligente reflektierende Oberfläche ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Automated Model Generation and Observer Design for Interconnected Systems (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work addresses the automated generation of physical-based models and model-based observers. We develop port-Hamiltonian methods, which for the first time allow a complete and consistent automation of these two processes for a large class of interconnected systems.
    Keywords: Mathematische Modellbildung; Beobachterentwurf; Automatisierung; Port-Hamiltonsche Systeme; Mathematical Modeling; Observer Design; Automation; Port-Hamiltonian Systems ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 32
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    In Situ Characterization and Modelling of Drying Dynamics for Scalable Printing of Hybrid Perovskite Photovoltaics (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: Hybrid perovskite photovoltaics could play a vital role in future’s renewable energy production. However, there are still severe challenges when scaling the technology. In this work, perovskite solution films drying in laminar and slot-jet air flows are investigated extensively by optical in situ characterization. The main results are a quantitative model of perovskite drying dynamics and a novel in situ imaging technique – yielding valuable predictions for large-scale perovskite fabrication.
    Keywords: Hybrid perovskite ; in situ characterization ; drying dynamics ; photoluminescence imaging ; up-scaling ; Hybride Perowskite ; In-Situ Charakterisierung ; Trocknungsdynamik ; Photolumineszenz-Bildgebung ; Hochskalierung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 33
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    Thermochemistry and Kinetics for the Oxidative Degradation of Dibenzofuran and Precursors (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-05
    Description: 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 a mechanism suitable for future modelling studies.Based on quantum chemical methods, energies, chemical structures and reactions are calculated numerically. Not only stable molecules and radicals, but also transition states are reported in this work.
    Keywords: QD1-999 ; ab initio ; Transition state theory ; Thermochemistry ; DFT ; Dioxin ; Dibenzofuran ; Groupe additivity ; Kinetics ; QRRK ; Isodesmic reactions ; thema EDItEUR::P Mathematics and Science::PN Chemistry
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    Hybrid photonic assemblies based on 3D-printed coupling structures (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Photonic integrated circuits (PIC) become increasingly important for numerous applications. Mass production of PIC has become widely available, but large-volume low-cost photonic packaging still represents a challenge. Additive micro-fabrication of free-form optical coupling structures is discussed as a concept to overcome this technology gap. Multi-photon 3D-lithography is used to fabricate dielectric waveguides ("photonic wire bonds", PWB) as well as facet-attached microlenses (FaML).
    Keywords: Photonische Aufbau- und Verbindungstechnik; integrierte photonische Schaltkreise; Multiphotonenlithographie; additive 3D Mikrofabrikation; Mikrooptik; photonic packaging; photonic integrated circuits (PIC); multi-photon lithographie; additive 3D micro-fabrication; micro-optics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 35
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    380 kV Superconducting Fault Current Limiter Feasibility Study (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: In this study the technical and economic feasibility of a 380 kV, 5 kA resistive type superconducting fault current limiter was investigated. Conceptual designs were developed with superconducting tapes cooled by liquid nitrogen and arranged in bifilar coils. A cryostat was designed using FEM simulations taking into account the non-linear voltage distribution. For the complete system including current limiting reactors and cooling system, the investment and operation costs were calculated.
    Keywords: economic feasibility; bifilar coil; high voltage; superconducting fault current limiter; superconductor; wirtschaftliche Machbarkeit; bifilare Spule; Hochspannung; supraleitender Strombegrenzer; Supraleiter ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 36
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    Electrochemical SPM study of 2D phase and 3D phase formation of Zn at the ionic liquid / Au(111) interface [online] (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-05
    Description: Zn electrodeposition in the under- (UPD) and overpotential (OPD) ranges by means of in-situ Scanning Tunneling Microscopy (STM) was examined, supported by in-situ cyclic voltammetry and chronoamperometrie. The underpotential deposition of Zn follows a layer-by-layer growth. For the first time the formation of three successive Zn monolayers has been observed in the UPD range. It has been shown, that the UPD of Zn is complicated due to surface alloying. The same growth mechanism extends from the UPD into OPD range until Al bulk deposition sets in. The UPD of Al at 100 mV vs. Zn/Zn(II) is marked by Moiré pattern formation. For the first time in this system the effective tunneling barrier f has been measured by STS. A first insight into the 2D phase formation of electrodeposited Zn at the electrolyte / electrode interface was obtained from STM images at various times and potentials. Before a coherent layer is formed wormlike structures are observed characteristic of spinodal decomposition. This implies a first order phase transition, which has been resolved here for the first time for 2D electrodeposition.
    Keywords: QD1-999 ; electrochemistry ; spinodal decomposition ; STM ; zinc ; layer growth ; thema EDItEUR::P Mathematics and Science::PN Chemistry
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    Development of NbN based Kinetic Inductance Detectors on sapphire and diamond substrates for fusion plasma polarimetric diagnostics (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work aimed at designing, studying and producing the first prototypes of KIDs tailored for fusion plasma polarimetric diagnostics. Diamond was considered for the first time as substrate material for low-temperature superconducting detectors given its unmatched optical, radiation hardness and thermal qualities, properties necessary for working environments potentially saturated with radiation. This work represents a first step toward the optimization and final application of this technology.
    Keywords: Supraleitender Detektor; Diamant; NbN; Kernfusionsplasma; Polarimetrie; Superconducting detector; Diamond; Nuclear Fusion Plasma; Polarimetry ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 38
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    Inverse Dynamic Game Methods for Identification of Cooperative System Behavior (2021)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work addresses inverse dynamic games, which generalize the inverse problem of optimal control, and where the aim is to identify cost functions based on observed optimal trajectories. The identified cost functions can describe individual behavior in cooperative systems, e.g. human behavior in human-machine haptic shared control scenarios.
    Keywords: optimale Regelung ; dynamische Spieltheorie ; kooperative Systeme ; Identifikation ; optimal control ; dynamic game theory ; cooperative systems ; identification ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 39
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    Dynamic Model-based Analysis of Oxygen Reduction Reaction in Gas Diffusion Electrodes (2024)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: In this work, the first simulation model of oxygen depolarized cathodes (ODC), which are silver catalyst-based gas diffusion electrodes, is presented that considers the phase equilibrium of the gas-liquid interface and structure-related inhomogeneities in electrolyte distribution. By means of the model it has been identified that mass transport of water and ions in the liquid phase is a crucial factor for electrode performance and how it is influenced by the electrode structure.
    Keywords: Chlor-alkali electrolysis; Three-phase model; Electrochemical Mass Spectroscopy; Inhomogeneous electrode structure; Chloralkali-Elektrolyse; Dreiphasen Modellierung; Elektrochemische Massenspektroskopie; Maxwell-Stefan Diffusion; Inhomogene Elektrodenstruktur ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 40
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    Technology Entrepreneurship : A Treatise on Entrepreneurs and Entrepreneurship for and in Technology Ventures. Band 1 und Band 2 (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-05
    Description: The treatise is the first coherent and comprehensive presentation of the important sub-field of ""technology entrepreneurship"" emphasizing the science and engineering perspectives. It is a presentation of technology entrepreneurship as an inter-cultural approach referring to the US and Germany. It integrates micro- and macro aspects referring to numerous cases of firms' foundations. The book provides also a new semi-quantitative approach to growth of new technology ventures.
    Keywords: QD1-999 ; Unternehmertum ; Unternehmer ; Technology ; Entrepreneurship ; Science ; Firmengründungen ; TechnikEntrepreneurs ; Firms' Foundations ; Wissenschaft ; thema EDItEUR::P Mathematics and Science::PN Chemistry
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    Wireless Terahertz Communications: Optoelectronic Devices and Signal Processing (2021)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Novel THz device concepts and signal processing schemes are introduced and experimentally confirmed. Record-high data rates are achieved with a simple envelope detector at the receiver. Moreover, a THz communication system using an optoelectronic receiver and a photonic local oscillator is shown for the first time, and a new class of devices for THz transmitters and receivers is investigated which enables a monolithic co-integration of THz components with advanced silicon photonic circuits.
    Keywords: Terahertz Kommunikation ; Drahtlosnetzwerke ; 6G ; Optoelektronische Signalverarbeitung ; Silizium Plasmonik ; Terahertz communication ; Wireless networks ; Optoelectronic signal processing ; Silicon plasmonics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 42
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    New Type of sub-THz Oscillator and Amplifier Systems Based on Helical-Type Gyro-TWTs (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: This work presents the development of a new sub-THz source for the generation of trains of coherent high-power ultra-short pulses at 263 GHz via passive mode-locking of two coupled helical gyro-TWTs. For the first time, it is shown that the operation of such passive mode-locked helical gyro-TWTs in the hard excitation regime is of particular importance to reach the optimal coherency of the generated pulses. This could be of particular interest for some new time-domain DNP-NMR methods.
    Keywords: passive Modenkopplung; Sub-THz; Gyro-TWT; Ultrakurze Pulse; passive mode-locking; sub-THz; gyro-TWT; ultra-short pulses ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 43
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    Technology and readout for scaling up superconducting nanowire single-photon detectors (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work presents three advances to scale SNSPDs from few-pixel devices to large detector arrays: atomic layer deposition for the fabrication of uniform superconducting niobium nitride films of few-nanometer thickness, a frequency-multiplexing scheme to operate multiple detectors with a reduced number of lines, and the integration of SNSPDs with free-form polymer structures to achieve efficient optical coupling onto the active area of the detectors.
    Keywords: SNSPD; Einzelphotonendetektor; Supraleitung; Atomlagenabscheidung; single-photon detector; superconductivity; thin-film technology; frequency-division multiplexing; optical integration ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 44
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    Technology Entrepreneurship : A Treatise on Entrepreneurs and Entrepreneurship for and in Technology Ventures. Band 1 (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-05
    Description: The treatise is the first coherent and comprehensive presentation of the important sub-field of ""technology entrepreneurship"" emphasizing the science and engineering perspectives. It is a presentation of technology entrepreneurship as an inter-cultural approach referring to the US and Germany. It integrates micro- and macro aspects referring to numerous cases of firms' foundations. The book provides also a new semi-quantitative approach to growth of new technology ventures.
    Keywords: QD1-999 ; Unternehmertum ; Unternehmer ; Technology ; Entrepreneurship ; Science ; Firmengründungen ; TechnikEntrepreneurs ; Firms' Foundations ; Wissenschaft ; thema EDItEUR::P Mathematics and Science::PN Chemistry
    Language: English
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  • 45
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    Guaranteed Verification of Dynamic Systems (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work introduces a new specification and verification approach for dynamic systems. The introduced approach is able to provide type II error free results by definition, i.e. there are no hidden faults in the verification result. The approach is based on Kaucher interval arithmetic to enclose the measurement in a bounded error sense. The developed methods are proven mathematically to provide a reliable verification for a wide class of safety critical systems.
    Keywords: Verifikation ; Dynamische Systeme ; Intervall Arithmetik ; Diagnose ; Bounded Error ; Verification ; Dynamic Systems ; Interval Arithmetic ; Diagnosis ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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    OCM 2021 - Optical Characterization of Materials (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: The state of the art in the optical characterization of materials is advancing rapidly. New insights have been gained into the theoretical foundations of this research and exciting developments have been made in practice, driven by new applications and innovative sensor technologies that are constantly evolving. The great success of past conferences proves the necessity of a platform for presentation, discussion and evaluation of the latest research results in this interdisciplinary field.
    Keywords: Charakterisierung von Materialien ; Hyperspektral ; multispektrale Bildanalyse ; Röntgenmethoden ; Recycling ; characterisation of materials ; hyperspectral ; multispectral image analysis ; X-ray methods ; recycling ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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    OCM 2023 (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: The state of the art in the optical characterization of materials is advancing rapidly. New insights have been gained into the theoretical foundations of this research and exciting developments have been made in practice, driven by new applications and innovative sensor technologies that are constantly evolving.The great success of past conferences proves the necessity of a platform for presentation, discussion and evaluation of the latest research results in this interdisciplinary field.
    Keywords: Charakterisierung von Materialien; Hyperspektral; multispektrale Bildanalyse; Röntgenmethoden; Recycling; characterisation of materials; hyperspectral; multispectral image analysis; X-ray methods; recycling ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 48
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    Charge Transport in DNA - Insights from Simulations (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-05
    Description: Charge transport and charge transfer (CT) capabilities of deoxyribonucleic acid (DNA) are investigated. A QM/MM multi-scale framework is applied to calculate the CT capabilities of DNA under conditions resembling the experimental setup. The simulations are able to explain and predict the outcome of experiments and therefore make suggestions in advance. Based on the findings, suitable DNA sequences can be opted for the design of DNA-based devices as nano-scale electronic elements.
    Keywords: QD1-999 ; Charge Transfer ; Molecular Dynamics ; Charge Transport ; Quantum Mechanics ; DNA ; thema EDItEUR::P Mathematics and Science::PN Chemistry
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    Solid-state ¹?F-NMR studies on fluorine-labeled model compounds and biomolecules (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-05
    Description: The fluorine nucleus, when introduced as a reporter group in membrane-associated proteins or peptides, offers a highly sensitive alternative to conventional isotope labels in solid-state NMR spectroscopy. The study presented here is concerned with the development of 19F-NMR methods, as well as data analysis schemes to extract the wealth of structural and motional information from the spectra.
    Keywords: QD1-999 ; Fluorkern ; thema EDItEUR::P Mathematics and Science::PN Chemistry
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    State-of-the-Art of High-Power Gyro-Devices. Update of Experimental Results 2021 (2021)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This report presents an update of the experimental achievements published in the review “State- of-the-Art of High-Power Gyro-Devices and Free Electron Masers”, Journal of Infrared, Millime-ter, and Terahertz Waves, 41, No. 1, pp 1-140 (2020) related to the development of gyro-devices (Tables 2-34). Emphasis is on high-power gyrotron oscillators for long-pulse or continuous wave (CW) operation and pulsed gyrotrons for any applications.
    Keywords: Gyrotron-Oszillator ; Gyro-RWO ; Gyro-Verstärker ; CARM ; Dielektrische Vakuumfenster ; Gyrotron-Oscillator ; Gyro-BWO ; Gyro-Amplifier ; Dielectric Vacuum Windows ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 51
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    Multiscale Cohort Modeling of Atrial Electrophysiology (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: An early detection and diagnosis of atrial fibrillation sets the course for timely intervention to prevent potentially occurring comorbidities. Electrocardiogram data resulting from electrophysiological cohort modeling and simulation can be a valuable data resource for improving automated atrial fibrillation risk stratification with machine learning techniques and thus, reduces the risk of stroke in affected patients.
    Keywords: Electrophysiologische Modellierung und Simulation; Elektrokardiogramm; Maschinelles Lernen; Vorhofflimmern; Statistisches Shape Modell; electrophysiological modeling and simulation; electrocardiogram; machine learning; atrial fibrillation; statistical shape model ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 52
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    Light Field Imaging for Deflectometry (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Optical measurement methods are becoming increasingly important for high-precision production of components and quality assurance. The increasing demand can be met by modern imaging systems with advanced optics, such as light field cameras. This work explores their use in the deflectometric measurement of specular surfaces. It presents improvements in phase unwrapping and calibration techniques, enabling high surface reconstruction accuracies using only a single monocular light field camera.
    Keywords: phase unwrapping; camera calibration; light field cameral Phasenentfaltung; Kamerakalibrierung; Lichtfeldkamera; surface reconstruction; deflectometry; Oberflächenrekonstruktion; Deflektometrie ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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    A new method of seawater desalination via acrylic acid based hydrogels: Synthesis, characterisation, and experimental realisation (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-05
    Description: 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 water and salt is explored. The bound charges in such a polymeric network prevent salt from entering it - under pressure the desalinated water is released from the gel. It is demonstrated that the method is viable and the influence of various process parameters investigated.
    Keywords: QD1-999 ; Polyelectrolyte networks ; Desalination ; Pore size determination ; Hydrogel ; thema EDItEUR::P Mathematics and Science::PN Chemistry
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  • 54
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    High-Precision Automotive Radar Target Simulation (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Radar target simulators (RTSs) deceive a radar under test (RuT) by creating an artificial environment consisting of virtual radar targets. In this work, new techniques are presented that overcome the rasterization deficiency of current RTS systems and enable the generation of virtual targets at arbitrary high-precision positions. This allows for continuous movement of the targets and thus a more credible simulation environment.
    Keywords: automotive radar; Radar target simulation; Automobilradar; Radarzielsimulation; autonomous driving; validation; Validierung; Autonomes Fahren ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 55
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    Model-based Filtering of Interfering Signals in Ultrasonic Time Delay Estimations (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work presents model-based algorithmic approaches for interference-invariant time delay estimation, which are specifically suited for the estimation of small time delay differences with a necessary resolution well below the sampling time. Therefore, the methods can be applied particularly well for transit-time ultrasonic flow measurements, since the problem of interfering signals is especially prominent in this application.
    Keywords: Laufzeitschätzung; Analytische Wavelet-Pakete; Ultraschalldurchflussmessung; Time Delay Estimation; Analytic Wavelet Packets; Ultrasonic Flow Measurement ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 56
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    AC Losses in High-Temperature Superconductor Tapes and Cables for Power Applications (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work focuses on two topics. The first is the investigation of producing filaments on copper-stabilized coated conductors, with striations made after or before electroplating the tape. The second topic is the applicability of the striations for reducing the AC losses of cables, in particular the CORC® and RACC cables, which are made with high-temperature superconductor (HTS) striated tapes.
    Keywords: AC-Verlustmessung; AC-Magnetisierungsverluste; Hochtemperatursupraleiter; Multifilament-Supraleiter; HTS-Kabel; AC loss measurement; AC magnetization losses; high-temperature superconductors; multifilamentary superconductors; HTS cables ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Raman spectroscopic study of high temperature rare earth metal - rare earth halide solutions: Ln-LnX3- and LnX2-LnX3-(LiX-KX)eu systems (Ln: Nd, Ce; X: Cl, I) [online] (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-05
    Description: In this work new Raman spectroscopic experiments on rare earth metal-rare earth trihalide melts (Ln-LnX3 and LnX2-LnX3: Ln=Ce, Nd; X=Cl, I) and their mixtures in alkali halide eutectic solvents ((LiX-KX)eu; X=Cl, I) are presented. The main results can be summarized as follows:- The Raman spectra of following trihalide systems have been measured for the first time: CeCl3, CeI3, NdI3 and their mixtures in the respective alkali halide eutectic solvent. The structure of the LnX3 in the solvent can be characterized by octahedral complexes. The force constants decrease from the chlorides to the iodides. - The Raman spectra of the following dihalides have been observed in this work: NdCl2, CeI2 and their mixtures in the alkali halide solvent. Interestingly, CeCl2 might form as intermediate species on doping CeCl3 with Ce. It is not a stable compound in the Ce-CeCl3 phase diagram.- With respect to the above mentioned main objective the following conclusions can be drawn: (i) On mixing of NdCl2 with NdCl3 in (LiCl-KCl)eu the undisturbed spectra of both components can be observed simultaneously. This is in agreement with the suggested intervalence charge transfer hopping mechanism if one assumes a hopping rate below 1012.(ii) Even though CeCl2 might form as intermediate, in the equilibrium spectra of liquid Ce-CeCl3-(LiCl-KCl)eu only the typical - 36 CeCl -octahedra can be identified. This supports the assumption that in these systems the electronic defect states are probably mobile Drude-like electrons which do not lead to new Raman detectable species. A qualitatively similar observation was made for CeI2-CeI3-(LiI-KI)eu melts.
    Keywords: QD1-999 ; Seltenerdhalogenide ; Hochtemperatur ; Raman-Spektroskopie ; thema EDItEUR::P Mathematics and Science::PN Chemistry
    Language: English
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    Limited Information Shared Control and its Applications to Large Vehicle Manipulators (2024)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work focuses on the Limited Information Shared Control and its controller design using potential games. Through the developed systematic controller design, the experiments demonstrate the effectiveness and superiority of this concept compared to traditional manual and non-cooperative control approaches in the application of large vehicle manipulators.
    Keywords: Experimental Validation; Vehicle Manipulator; Cooperative Shared Control; Potential Games; Differential Games; Experimentelle Validierung; Mobile Arbeitsmaschinen; Kooperative Regelung; Potenzialspiele; Differenzialspiele ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Waveguide-Based Photonic Sensors: From Devices to Robust Systems (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Integrated photonic sensor systems are miniaturized, mass-producible devices that leverage the mature semiconductor fabrication technology and a well-established ecosystem for photonic circuits. This book aims at a holistic treatment of waveguide-based photonic sensor systems by analyzing photonic waveguide design, photonic circuit design and readout design. Across all levels, a special emphasis is given to system-level performance optimization under realistic environmental conditions.
    Keywords: Optik ; Photonik ; Optoelektronik ; Sensoren ; Wellenleiter ; Optics ; Photonics ; Optoelectronics ; Sensors ; Waveguides ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Pushing the KIT 2 MW Coaxial-Cavity Short-Pulse Gyrotron Towards a DEMO Relevant Design (2021)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Magnetic fusion is one approach to generate thermonuclear fusion power in an environmental friendly way. The Electron Cyclotron Resonance Heating is considered as the major concept for startup, heating and control of the fusion plasma. Megawatt-class gyrotrons generate the required microwave power. This work focuses on advanced key components and technologies for a DEMO relevant 2 MW gyrotron. One major focus is on the development of advanced Magnetron Injection Guns. Another focus is on the red.
    Keywords: Gyrotron ; Koaxialer Resonator ; Fusion ; ECRH ; Coaxial Resonator ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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