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  • Books  (1,132)
  • T1-995  (1,132)
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  • Books  (1,132)
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  • 1
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    Millimeter-Wave Radio-over-Fiber Links based on Mode-Locked Laser Diodes (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Radio communications in the range of 60 GHz enable multi-Gigabit/s network access in indoor environments. Due to the propagation characteristics of such signals only very short range radio transmission is feasible. In order to distribute these signals across large distances, analog transmission over optical fiber is considered. In this work, mode-locked laser diodes serve as optoelectronic oscillators for the generation of such signals. Their system-relevant properties are studied in detail.
    Keywords: T1-995 ; millimeter wave communications ; mode-locked lasers ; wireless personal area networks ; radio-over-fiber ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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  • 2
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    Herstellung und Charakterisierung mechanisch flexibler organischer Solarzellen durch Flüssigprozessierung (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: This document presents the development and optoelectronic analysis of a flexible electrode system. The focus is the application of all functional layers out of solution to enable a cost effective processing with large area print and coating techniques. Moreover, the mechanical stability of the electrode system and the complete solar cell is investigated by tensile tests.
    Keywords: T1-995 ; organische Halbleiter ; printed electronics ; flexible electronics ; druckbare Elektronik ; Photovoltaik ; flexible Elektronik photovoltaic ; organic semiconductor ; solar cell ; Solarzelle ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 3
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    Entwicklung und vergleichende Bewertung einer bildbasierten Markierungslichtsteuerung für Kraftfahrzeuge (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In automotive lighting technology there have been taken place intense research efforts in the field of adaptive lighting systems to provide a flexible luminance intensity distribution optimally adapted to the situational prevailing traffic and atmospheric situation in the last recent years.This paper describes the development and comparative evaluation of an image-based control system for a marking light approach designed for motor vehicles.
    Keywords: T1-995 ; Bildverarbeitung ; Probandenstudie ; Lichtbasiertes Fahrerassistenzsystem ; Erkennbarkeitsentfernung ; Dynamische Zustandsschätzung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 4
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    Modellbasierte Entwicklung eines aktiven Sicherheitssystems für elektrifizierte Fahrräder (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: The electrical energy on electrified bicycles offers new functional possibilities such as an active safety system to assist the rider during the braking process. This work shows the technical feasibility of such a system by presenting a rideable prototype. The so-called braking dynamics assistance system prevents the cyclist from both front wheel lockup and rollover (along the vehicle’s transverse axis).
    Keywords: T1-995 ; Elektrofahrrad ; safety system ; Fahrdynamik ; Electric bicycle ; vehicle dynamics ; model-based design ; Verkehrssicherheit ; road safety ; Modellbasierte Entwicklung ; Sicherheitssystem ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 5
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    Entwicklung einer Plattform zur individuellen Ansteuerung von Mikroventilen und Aktoren auf der Grundlage eines Phasenüberganges zum Einsatz in der Mikrofluidik (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Im Rahmen dieser Arbeit wurde eine Plattform zur individuellen Ansteuerung einer Vielzahl thermisch aktivierter Mikroventile und aktoren, auf Grundlage eines Phasenüberganges, zum Einsatz in der Mikrofluidik entwickelt. Ventile dienen dazu den Fluidstrom in komplexen mikrofluidischen Systemen, aus Einsatzgebieten wie der Biologie, Chemie oder Biotechnologie, zu manipulieren. Mit steigender Komplexität der Mikrosysteme steigt auch die Anzahl der benötigten, individuell steuerbaren Mikroventile.
    Keywords: T1-995 ; thermisch ; Mikrofluidik ; Mikroventile ; Phasenübergang ; Mikroaktoren ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 6
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    Energieoptimale Fahrdynamikregelung mehrmotoriger Elektrofahrzeuge (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Within the scope of this work a generic approach to the control of multiple-drive electric vehicles is evolved. An analysis of the overall system with respect to the exploitable degrees of freedom for wheel torque control reveals that several possible solutions for distributing wheel torque exist in certain driving situations. This characteristic of over-actuated systems is exploited in order to pursue further subordinate objectives from from a control perspective.
    Keywords: T1-995 ; mehrmotoriger Antriebsstrangvehicle dynamics control ; efficiency ; energieoptimal ; Elektrofahrzeug ; torque allocation ; Fahrdynamik ; over-actuated ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 7
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    Prädiktive Lichtfunktionen für volladaptive Scheinwerfersysteme (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In this work, the realisation of an adaptive driving beam is examined that is based on the motion prediction of the ego vehicle and other traffic participants. Furthermore, light functions are developed and analysed regarding their effectiveness that project situation adaptive recommendations for action in front of the vehicle regarding a turn or lane change intention of the driver.
    Keywords: T1-995 ; Trajektorienprädiktion ; maneuver detection ; trajectory prediction ; predictive light functions ; Lichtbasierte Assistenzsysteme ; Prädiktive Lichtfunktionen ; Manöverdetektion ; light-based assistance systems ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 8
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    The Global Race for Technological Superiority (2021)
    Ledizioni
    Details
    Publication Date: 2023-12-21
    Description: This report published by ISPI and the Brookings Institution analyzes the challenges to international order posed by the ongoing race for technological superiority. From artificial intelligence and quantum computing to hypersonic weapons and new forms of cyber and electronic warfare, advances in technology have threatened to make the international security environment more unpredictable and volatile – yet the international community remains unprepared to assess and manage that risk. What is needed is a mature understanding of how technology has emerged as a key enabler of sovereignty in the XXI century, how the ongoing race for technological supremacy is disrupting the balance of power globally, and what the attendant strategic and security implications of those transformations will be. This report is an effort to that end.
    Keywords: T1-995 ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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  • 9
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    Tourenplanung mit alternativen Lieferperioden und Teillieferungen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: 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 employed, freight forwarders get a wider scope for planning and can therefore plan more efficient routes. Even with few alternative delivery periods, which allow vehicles to be used more efficiently, substantial savings can be achieved.
    Keywords: T1-995 ; Column-Generation ; SDVRPAVehicle-Routing-Problem ; Alternative Periods ; SDVRPA ; Tourenplanung ; Teillieferungen ; Branch-Price-and-Cut ; Alternative Perioden ; Split-Deliveries ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 10
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    Recent Advances in Mechanics of Non-Newtonian Fluids (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: Non-Newtonian (non-linear) fluids are common in nature, for example, in mud and honey, but also in many chemical, biological, food, pharmaceutical, and personal care processing industries. This Special Issue of Fluids is dedicated to the recent advances in the mathematical and physical modeling of non-linear fluids with industrial applications, especially those concerned with CFD studies. These fluids include traditional non-Newtonian fluid models, electro- or magneto-rheological fluids, granular materials, slurries, drilling fluids, polymers, blood and other biofluids, mixtures of fluids and particles, etc.
    Keywords: TA1-2040 ; T1-995 ; Poiseuille–Couette flow ; membrane ; viscous fluid ; channel flow ; existence theorem ; yield stress ; hemoglobe capacitor ; creeping flows ; viscoplastic fluids ; projection method ; power-law fluid ; first- and second-order slip ; Mittag–Leffler ; lubrication ; viscoplastic fluid ; rupture ; convection ; Re numbers ; enhanced oil recovery (EOR) ; SPH-FEM ; Gamma densitometer ; oil recovery ; non-newtonian fluids ; marginal function ; particle interaction ; computational fluid dynamics ; non-isothermal flows ; suspensions ; Brinkman equation ; lubrication approximation (76A05 ; lid-driven cavity ; smoothed particle hydrodynamics (SPH) ; 76D08 ; Phan-Thien–Tanner (PTT) model ; bubble suspension ; porous media ; non-equilibrium thermodynamics ; porous medium ; suspension viscosity ; hemoglobin ; convection-diffusion ; slug translational velocity ; closure relationship ; non-linear fluids ; wormlike micellar solutions (WMS) ; high viscosity oil ; viscoelastic surfactants (VES) ; 76A20) ; meshless ; Bingham fluid ; Reynolds equation ; generalised simplified PTT ; dense suspension ; chemical EOR (cEOR) ; buoyancy force ; viscosity ratio ; aspect ratio ; rheology ; lubrication approximation ; fluid-solid interaction (FSI) ; optimal control ; natural convection ; biofluids ; shear-dependent viscosity ; thermodynamic capacitor ; shear-thinning ; stokesian dynamics ; weak solution ; biological capacitor ; cement ; variable viscosity ; Couette flow ; pressure boundary conditions ; inhomogeneous fluids ; boundary control ; similarity transformation ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
    Language: English
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  • 11
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    Nanostructure Based Sensors for Gas Sensing: from Devices to Systems (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: The development of solid state gas sensors based on microtransducers and nanostructured sensing materials is the key point in the design of portable measurement systems able to reach sensing and identification performance comparable with analytical ones. In such a context several efforts must be spent of course in the development of the sensing material, but also in the choice of the transducer mechanism and its structure, in the electrical characterization of the performance and in the design of suitable measurement setups. This call for papers invites researchers worldwide to report about their novel results on the most recent advances and overview in design and measurements for applications in gas sensors, along with their relevant features and technological aspects. Original research papers are welcome (but not limited) on all aspects that focus on the most recent advances in: (i) basic principles and modeling of gas and VOCs sensors; (ii) new gas sensor principles and technologies; (iii) Characterization and measurements methodologies; (iv) transduction and sampling systems; (vi) package optimization; (vi) gas sensor based systems and applications.
    Keywords: TA1-2040 ; T1-995 ; indium oxide ; n/a ; environmental monitoring ; semiconductor ; gas sensor ; packed gas chromatographic column ; ultrathin carbon layer ; metal-oxide-semiconductor array sensor ; halitosis ; laser ablation ; capacitive micromachined ultrasonic transducers (CMUT) ; LTCC side via ; MEMS ; indirect packaging ; gas sensing ; efficiency ; bad breath ; electrospray ; array optimization ; low temperature co-fired ceramic (LTCC) ; electronic nose ; UV irradiation ; core/shell nanostructure ; combinatorial and high-throughput technique ; sensitive material ; hydrogen sulfide ; CO detection ; ZnO ; amperometric ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
    Language: English
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  • 12
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    Neues Konzept zur Bewegungsanalyse und -synthese für Humanoide Roboter basierend auf Vorbildern aus der Biologie (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: New methods to generate and analyze motions of humanoid robots are presented and applied to a demonstrator. Reflexes of humans and neural central pattern generators (CPGs) were used as archetype. With leaky Integrate-and-Fire neurons a generic reflex template was designed and put to work for several specialized reflexes. The designed CPGs were used to analyze robotik motion as well as for generation of locomotion patterns on a biped demonstrator.
    Keywords: T1-995 ; Reflexe ; Humanoider Roboter ; Zentrale MustergeneratorenHumanoid Robot ; CentralPatternGenerator ; Reflexes ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 13
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    Zum Phasengleichgewicht und Stofftransport in vernetzten Polymersystemen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Die vorliegende Arbeit beschäftigt sich mit der Phasengleichgewichts- und Stofftransportcharakteristik vernetzter Polymere, wie sie in Controlled-Release-Anwendungen, der Brennstoffzellen- und Separationstechnologie oder der Sensor-Aktor-Technik zum Einsatz kommen. Dabei werden insbesondere auch Strategien zur quantitativen Bestimmung der relevanten Gleichgewichts- und Transportparameter vorgestellt, welche auf der Kopplung einer spektroskopischen Messmethode und Simulationsrechnungen basieren.
    Keywords: T1-995 ; Polymermembran ; Stofftransport ; Polyvinylalkohol ; Raman-Spektroskopie ; Phasengleichgewicht ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 14
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    Time-dependent spectrum analysis of high power gyrotrons (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: 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 indication in the entire D-Band (110-170 GHz). Special attention was given to the investigation of parasitic RF oscillations, and the analysis of the interplay of thermal cavity expansion and ionization-based space charge neutralization at the start of long RF pulses.
    Keywords: T1-995 ; spectrum analysis ; Mikrowellenmesstechnik ; millimeter waves ; Gyrotron ; Spektralanalyse ; Millimeterwellen ; microwave measurement techniques ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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  • 15
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    Neues Konzept für die bedarfsgerechte Energieversorgung des Künstlichen Akkommodationssystems (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Das Wiederherstellen der Akkommodationsfähigkeit des Auges bei Presbyopie oder nach Kataraktoperationen stellt derzeit eine der größten Herausforderungen der Augenheilkunde dar. Das Künstliche Akkommodationssystem ermöglicht die dauerhafte Wiederherstellung der Akkommodationsfähigkeit. In der vorliegenden Arbeit wird ein neues Konzept für die bedarfsgerechte Energieversorgung des Künstlichen Akkommodationssystems erstellt.
    Keywords: T1-995 ; Akkommodationssystem bedarfsgerecht Energieversorgung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 16
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    Ein Verfahren zum automatischen Entwurf von Mensch-Maschine-Schnittstellen am Beispiel myoelektrischer Handprothesen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Die Steuerung von künstlichen Gliedmaßen durch Muskel- bzw. Nervensignale oder von virtuellen Tastaturen durch Hirnsignale erfordert eine Schnittstelle, die die menschlichen Wünsche erfasst, interpretiert und dem angeschlossenen System verfügbar macht. Bestehende Systeme zeichnen sich durch eine einfache Bedienbarkeit aus, verfügen jedoch nur über eine eingeschränkte Funktionalität und müssen zudem manuell entworfen werden.In dieser Arbeit wird ein neues Verfahren zum automatischen Entwurf von MMIs vorgestellt und so die Funktionalität bestehender Systeme erweitert.
    Keywords: T1-995 ; Mensch-Maschine-Schnittstelle ; Diskriminanzfunktion ; Mensch-Maschine-Kommunikation ; Echtzeitverarbeitung ; Entwurfsautomation ; Steuerung ; Lernende Steuerung ; Klassifikation ; Muskelkontraktion ; Systementwurf ; Gehirn-Computer-Schnittstelle ; Echtheit / Merkmal ; Diskriminanzanalyse ; Elektromyographie ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 17
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    Magnetic Resonance Imaging on Patients with Implanted Cardiac Pacemakers (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: The aim of this work was to identify the patterns that can induce heating around implanted cardiac pacemakers during MRI and to develop strategies to counteract them. Two approaches were taken: computer simulations of the occurring electromagnetic field distributions and in-vitro experiments using phantoms in real MRI devices, both for conventional bore-hole and new open MRI systems. Using the open MRI, the observed heating could be reduced significantly.
    Keywords: T1-995 ; pacemaker ; MRI ; numerical field calculation ; biomedical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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  • 18
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    Solution Models based on Symmetric and Asymmetric Information (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: This Special Issue covers symmetry and asymmetry phenomena occurring in real-life problems. We invited authors to submit their theoretical or experimental research presenting engineering and economic problem solution models dealing with the symmetry or asymmetry of different types of information. The issue gained interest in the research community and received many submissions. After rigorous scientific evaluation by editors and reviewers, nine papers were accepted and published. The authors proposed different MADM and MODM solution models as integrated tools to find a balance between the components of sustainable global development, to find a symmetry axis concerning goals, risks, and constraints to cope with the complicated problems. Most approaches suggested decision models under uncertainty, combining the usual decision-making methods with interval-valued fuzzy or rough sets theory, also Z numbers. The application fields of the proposed models involved both problems of technological sciences and social sciences. The papers cover three essential areas: engineering, economy, and management. We hope that a summary of the Special Issue as provided here will encourage a detailed analysis of the papers included in the Printed Edition.
    Keywords: TA1-2040 ; T1-995 ; rough sets ; interval type-2 fuzzy set (IT2FS) ; resources distribution ; the criteria of the weights ; public management ; Step-wise Weight Assessment Ratio Analysis (SWARA) ; multi-criteria decision-making (MCDM) ; symmetry of the method ; quadcopter ; transaction cost ; full fuzzy environment ; dual generalized geometric Bonferroni mean (DGGBM) operator ; data logger ; information theory ; control system ; salvage value ; nonlinear dynamics ; pattern formation ; oscillations ; stability ; Pythagorean fuzzy set ; FAHP ; fuzzy sets ; group decision-making ; generalized Bonferroni mean (GBM) operator ; probabilistic systems analysis ; economic decisions ; 2-tuple linguistic neutrosophic numbers set (2TLNNSs) ; evaluating the quality of distant courses ; subjective weights ; Z-numbers ; green supplier selection ; dual generalized Bonferroni mean (DGBM) operator ; normal cloud ; thrust ; sensor ; neutrosophic numbers ; MCDM ; Bayes’ theorem ; optimal dividend ; logistics ; measurement ; hybrid MCDM ; combining the weights ; data envelopment analysis ; criteria weights ; multiple attribute decision making (MADM) ; IDOCRIW ; excess-of-loss reinsurance ; fuzzy efficiency ; multiple-criteria decision-making (MCDM) ; MCGDM ; transport ; backward cloud transformation ; engineering problems ; rough ARAS ; capital injection ; performance ; Bonferroni mean (BM) operator ; green supply chain management ; population sizes ; hybrid problem solution models ; criteria weight assessment ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
    Language: English
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  • 19
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    Werkstoffanalytische Betrachtung der Eigenschaften von mittels neuartiger RTM-Fertigungsprozesse hergestellten glasfaserverstärkten Polymerverbunden (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In this work fiber reinforced polymers were characterized. The composites were manufactured with optimized resin transfer molding (RTM) production strategies to make the standard RTM process more efficient. To determine where the potential of the new production techniques is the quasi static mechanical properties were measured and also calculated with an analytical modulation. On this database the different processes were compared to each other.
    Keywords: T1-995 ; Werkstoffprüfung ; RTM-Fertigungsverfahren ; process comparison ; Polymer ; RTM ; Verbundwerkstoff ; materials characterization ; RTM manufacturing process ; Glasfaser ; aserverbundwerkstoffe ; Prozessvergleich ; fiber reinforced polymers ; Materialcharakterisierung ; Analytische Modellierung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 20
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    Realization Limits of Impulse-Radio UWB Indoor Localization Systems (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In this work, the realization limits of an impulse-based Ultra-Wideband (UWB) localization system for indoor applications have been thoroughly investigated and verified by measurements. The analysis spans from the position calculation algorithms, through hardware realization and modeling, up to the localization experiments conducted in realistic scenarios. The main focus was put on identification and characterization of limiting factors as well as developing methods to overcome them.
    Keywords: T1-995 ; localization ; UWB ; transceiver ; positioning ; ultra-wideband ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
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  • 21
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    Middleware Solutions for Wireless Internet of Things (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: The proliferation of powerful but cheap devices, together with the availability of a plethora of wireless technologies, has pushed for the spread of the Wireless Internet of Things (WIoT), which is typically much more heterogeneous, dynamic, and general-purpose if compared with the traditional IoT. The WIoT is characterized by the dynamic interaction of traditional infrastructure-side devices, e.g., sensors and actuators, provided by municipalities in Smart City infrastructures, and other portable and more opportunistic ones, such as mobile smartphones, opportunistically integrated to dynamically extend and enhance the WIoT environment. A key enabler of this vision is the advancement of software and middleware technologies in various mobile-related sectors, ranging from the effective synergic management of wireless communications to mobility/adaptivity support in operating systems and differentiated integration and management of devices with heterogeneous capabilities in middleware, from horizontal support to crowdsourcing in different application domains to dynamic offloading to cloud resources, only to mention a few. The book presents state-of-the-art contributions in the articulated WIoT area by providing novel insights about the development and adoption of middleware solutions to enable the WIoT vision in a wide spectrum of heterogeneous scenarios, ranging from industrial environments to educational devices. The presented solutions provide readers with differentiated point of views, by demonstrating how the WIoT vision can be applied to several aspects of our daily life in a pervasive manner.
    Keywords: TA1-2040 ; T1-995 ; container ; fog computing ; virtual reality ; privacy and security ; software defined infrastructure ; intelligent medical service ; very long instruction word (VLIW) ; semantics ; privacy leakage detection ; context information ; post-copy ; ontology ; body area network ; DSP ; Internet-of-Things ; Mobile Device Management ; interoperability ; Android ; water consumption ; Processing-in-Memory ; performance analysis ; semantic ; mobility ; data management ; CRIU ; training simulator ; Industry 4.0 ; sensor networks ; experimental evaluation ; programming paradigm ; pre-copy ; microservice-oriented platform ; CubeSats ; middleware ; registry ; smart metering ; big data analytics ; nanosatellites ; medium access control ; Internet of Things ; heterogeneity ; web-of-things ; one-to-one computing educational program ; Web-of-Things ; internet of things ; instruction set extension ; microservices architecture ; migration ; behaviour ; wireless access networks ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
    Language: English
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  • 22
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    Untersuchung der Schwingungseigenschaften von teleskopierbaren Maschinenelementen mit Spiel am Beispiel eines Gabelstapler-Hubgerüstes (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Teleskopierbare, spielbehaftete Hubgerüste von Gabelstaplern werden während eines Arbeitszyklus oftmals zu Schwingungen angeregt. Die charakteristischen Schwingungseigenschaften, bedingt durch das usammenwirken von Spiel, auskragender Last und Schwerkraft, werden experimentell untersucht und durch ein 5-Massen-Modell sehr gut abgebildet.Sowohl mit aktiven als auch mit passiven Maßnahmen lassen sich die Schwingungen schnell und deutlich reduzieren.
    Keywords: T1-995 ; Maschinenelement ; Spiel ; Schwingungsverhalten ; Gabelstapler ; Flurförderer ; Hubgerüst ; Schwingungsdämpfer ; Schwingungstilger ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 23
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    Beitrag zur modellbasierten Regelung von Verbrennungsprozessen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Verbrennungsprozesse sind meist mit der Emission von Schadstoffen verbunden, weshalb sie möglichst schadstoffarm und energieeffizient geführt werden müssen.Bei den bislang dominierenden primären Brennstoffen sind aufgrund der gleichbleibenden Brennstoffeigenschaften langfristig optimierte Technologien und feste Regelungen einsetzbar. Zunehmend werden jedoch sekundäre Brennstoffe wie Prozessabgase oder Biomasse genutzt. Sie haben stark veränderliche chemisch-physikalische Eigenschaften und bewirken so einen veränderlichen Verbrennungsablauf der schwierig beherrschbar ist. Eine optimale Verbrennung lässt sich dann nur durch eine an den Verbrennungszustand und die Brennstoffe adaptierte modellbasierte Prozessregelung erreichen, die noch nicht Stand der Technik ist.Die Arbeit widmet sich im ersten Schwerpunkt dem modellbasierten Reglungsentwurf. Die theoretische Modellierung und der modellbasierte Entwurf adaptiver Regelungen für die Temperatur und die Sauerstoffkonzentration im Abgas wird am Beispiel einer halbtechnischen Brennkammer für veränderliche Brenngase analysiert. Berücksichtigt wird dabei das für Verbrennungen typische vorhaltbehaftete Regelstreckenverhalten.Der zweite Schwerpunkt bildet die online Messung und die rechnerba-sierte Auswertung von Zustandsgrößen am Beispiel der infrarotbasierten Temperaturmessung bei einem Feststoffbrennbett. Es werden neue Auswerteverfahren entwickelt, die sich u.a. auch bei der Regelung industrieller Verbrennungen bewährt haben.
    Keywords: T1-995 ; Modellierung ; Verbrennungsanalyse ; Regelungstechnik ; Technikumsanlage ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Direct hydroxylation of benzene to phenol in a microstructured Pd-based membrane reactor (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: The gas phase direct hydroxylation of benzene into phenol with hydrogen and oxygen, as initially described by Niwa in 2002, was realized in a newly developed double-membrane reactor. In the concept described by Niwa, a dense Pd membrane is used for the (safe) dosage of dissociated hydrogen species into the tubular reaction zone, where it reacts with gas phase oxygen to form surface species capable of directly converting benzene into phenol in a single-step process.
    Keywords: T1-995 ; Pd-Membran ; Katalyse ; Phenol ; Benzol ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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    Magnetization of High Temperature Superconducting Trapped-Field Magnets (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: High temperature superconducting (HTS) bulks and stacks of coated conductors can be magnetized to become trapped-field magnets that provide much stronger magnetic fields than those reachable with conventional permanent magnets. This work investigates the flux dynamics during the magnetization of HTS trapped-field magnets and proposes possible strategies to improve the trapped field produced by the pulsed field magnetization method that is promising for practical applications.
    Keywords: T1-995 ; trapped-field magnet ; Hochtemperatur-Supraleiter ; pulsed field magnetization ; High temperature superconductor ; Supraleiter mit eingeschlossenem Magnetfeld ; gepulste Feldmagnetisierung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
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    Radiation Tolerant Electronics (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: Research on radiation-tolerant electronics has increased rapidly over the past few years, resulting in many interesting approaches to modeling radiation effects and designing radiation-hardened integrated circuits and embedded systems. This research is strongly driven by the growing need for radiation-hardened electronics for space applications, high-energy physics experiments such as those on the Large Hadron Collider at CERN, and many terrestrial nuclear applications including nuclear energy and nuclear safety. With the progressive scaling of integrated circuit technologies and the growing complexity of electronic systems, their susceptibility to ionizing radiation has raised many exciting challenges, which are expected to drive research in the coming decade. In this book we highlight recent breakthroughs in the study of radiation effects in advanced semiconductor devices, as well as in high-performance analog, mixed signal, RF, and digital integrated circuits. We also focus on advances in embedded radiation hardening in both FPGA and microcontroller systems and apply radiation-hardened embedded systems for cryptography and image processing, targeting space applications.
    Keywords: TA1-2040 ; TK1-9971 ; T1-995 ; single event effects ; n/a ; radiation-hardening-by-design (RHBD) ; frequency divider by two ; single event upset ; Image processing ; CMOS analog integrated circuits ; FPGA ; total ionizing dose (TID) ; Impulse Sensitive Function ; soft error ; hardening by design ; radiation hardening by design ; X-rays ; Single-Event Upsets (SEUs) ; line buffer ; heavy ions ; VHDL ; FPGA-based digital controller ; radiation hardening by design (RHBD) ; radiation hardening ; SRAM-based FPGA ; proton irradiation ; ring oscillator ; sensor readout IC ; fault tolerance ; space application ; physical unclonable function ; voltage controlled oscillator (VCO) ; Ring Oscillators ; analog single-event transient (ASET) ; single event opset (SEU) ; SEB ; single event upsets ; bipolar transistor ; total ionizing dose ; protons ; triple modular redundancy (TMR) ; gain degradation ; space electronics ; saturation effect ; configuration memory ; Co-60 gamma radiation ; total ionization dose (TID) ; frequency synthesizers ; CMOS ; PLL ; TDC ; single-event upsets (SEUs) ; bandgap voltage reference (BGR) ; 4MR ; single-shot ; error rates ; Radiation Hardening by Design ; soft errors ; heavy-ions ; single-event effects (SEE) ; single event transient (SET) ; SEE testing ; proton irradiation effects ; RFIC ; single event upset (SEU) ; FMR ; ionization ; radiation tolerant ; triplex–duplex ; neutron irradiation effects ; digital integrated circuits ; single event gate rupture (SEGR) ; power MOSFETs ; ring-oscillator ; selective hardening ; voltage reference ; nuclear fusion ; TMR ; gamma-rays ; gamma ray ; instrumentation amplifier ; radiation effects ; reference circuits ; radiation-hardened ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Smart Sensors for Structural Health Monitoring (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: Smart sensors are technologies designed to facilitate the monitoring operations. For instance, power consumption can be minimized through on-board processing and smart interrogation algorithms, and state detection enhanced through collaboration between sensor nodes. Applied to structural health monitoring, smart sensors are key enablers of sparse and dense sensor networks capable of monitoring full-scale structures and components. They are also critical in empowering operators with decision making capabilities. The objective of this Special Issue is to generate discussions on the latest advances in research on smart sensing technologies for structural health monitoring applications, with a focus on decision-enabling systems. This Special Issue covers a wide range of related topics such as innovative sensors and sensing technologies for crack, displacement, and sudden event monitoring, sensor optimization, and novel sensor data processing algorithms for damage and defect detection, operational modal analysis, and system identification of a wide variety of structures (bridges, transmission line towers, high-speed trains, masonry light houses, etc.).
    Keywords: TA1-2040 ; T1-995 ; NSGA-II ; wind force ; wavelet packet decomposition ; structural health monitoring ; amplitude spectrum ; environmental noise ; patch antenna ; damage identification ; event-triggered sensing ; Particle Swarm Optimization (PSO) algorithm ; high-speed train ; low-velocity impacts ; concrete structures ; sensors distribution optimization ; acceleration ; digital sampling moiré ; crack ; displacement sensor ; length effect ; FBG sensor array ; SHM ; space window ; Bayesian blind source separation ; feature selection ; stress detection ; wheel minor defect ; strain ; uniaxial stress measurement ; turbine ; impact identification ; helical antenna ; energy analysis of wavelet band ; strain wave ; time window ; structural steel members ; steel frame ; acoustoelastic effect ; demand-based nodes ; online wayside detection ; sensor ; bridge ; sensitivity ; acoustic emission ; bending stiffness ; wireless smart sensors ; distributed dense sensor network ; mapping construction ; data fusion ; fuzzy classification ; shear-wave birefringence ; normal mode ; piezoelectric wafer active sensors ; resonant frequency ; electromagnetic oscillation ; settlement ; sensor optimization ; modal frequencies ; perturbation theory ; feature extraction ; Virtual Distortion Method (VDM) ; reflective optical sensor ; fibre bundle ; smartphones ; crack identification ; active sensing ; test vehicle ; calibration ; stretching method ; model updating ; rotary ultrasonic array ; 2D crack growth ; data processing ; damage detection ; impactor stiffness ; tip clearance ; transmission tower ; phase spectrum ; concrete crack ; structural impact monitoring ; shaking table tests ; optical crack growth sensor ; steel strand ; passive sensing ; sudden event monitoring ; aero engine ; principal component analysis ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Advanced Mobile Robotics: Volume 3 (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: Mobile robotics is a challenging field with great potential. It covers disciplines including electrical engineering, mechanical engineering, computer science, cognitive science, and social science. It is essential to the design of automated robots, in combination with artificial intelligence, vision, and sensor technologies. Mobile robots are widely used for surveillance, guidance, transportation and entertainment tasks, as well as medical applications. This Special Issue intends to concentrate on recent developments concerning mobile robots and the research surrounding them to enhance studies on the fundamental problems observed in the robots. Various multidisciplinary approaches and integrative contributions including navigation, learning and adaptation, networked system, biologically inspired robots and cognitive methods are welcome contributions to this Special Issue, both from a research and an application perspective.
    Keywords: TA1-2040 ; T1-995 ; similarity measure ; swarm-robotics ; drag-based system ; PID algorithm ; human–robot interaction ; behaviour dynamics ; state constraints ; fair optimisation ; micro mobile robot ; robot ; actuators ; high-gain observer ; turning model LIP ; space robot ; manipulation action sequences ; subgoal graphs ; remotely operated vehicle ; constrained motion ; joint limit avoidance ; curvilinear obstacle ; rehabilitation system ; stability criterion ; system design ; quad-tilt rotor ; iterative learning ; spiral curve ; cable detection ; SEA ; douglas–peuker polygonal approximation ; predictable trajectory planning ; ATEX ; obstacle avoidance system ; kinematic singularity ; collision avoidance ; biologically-inspired ; jumping robot ; differential wheeled robot ; design and modeling ; control efficacy ; robotics ; extremum-seeking ; object-oriented ; non-holonomic mobile robot ; magneto-rheological fluids ; rendezvous consensus ; altitude controller ; master-slave ; switching control ; deep reinforcement learning ; mechanism ; expansion logic strategy ; negative buoyancy ; action generation ; radial basis function neural networks ; unmanned aerial vehicles ; extend procedure ; glass façade cleaning robot ; convolutional neural network ; climbing robot ; micro air vehicle ; car-like kinematics ; variable speed ; machine learning ; dynamical model ; transportation ; geodesic ; unmanned surface vessel ; medical devices ; stopper ; extended state observer (ESO) ; high efficiency ; object mapping ; multi-objective optimization ; hybrid robot ; robot learning ; auto-tuning ; cable disturbance modeling ; manipulation planning ; pesticide application ; high-speed target ; sparse pose adjustment (SPA) ; service robot ; lumped parameter method ; Geometric Algebra ; dynamic coupling analysis ; Thau observer ; tri-tilt-rotor ; industrial robotic manipulator ; hardware-in-the-loop simulation ; robotic drilling ; muscle activities ; small size ; chameleon ; continuous hopping ; wall climbing robot ; hover mode ; 3D-SLAM ; curvature constraints ; PSO ; drilling end-effector ; Rodrigues parameters ; gait adaptation ; static environments ; position/force cooperative control ; snake-like robot ; shape-fitting ; powered exoskeleton ; input saturation ; kinematic identification ; methane ; human–machine interactive navigation ; q-learning ; path following ; hopping robot ; mobile manipulation ; high step-up ratio ; actuatorless ; monocular vision ; stability analysis ; compact driving unit ; snake robot ; non-holonomic robot ; curvature constraint ; phase-shifting ; dialytic elimination ; gesture recognition ; snake robots ; series elastic actuator ; flapping ; servo valve ; motion camouflage control ; biomimetic robot ; minimally invasive surgery robot ; centralized architecture ; trajectory planning ; computing time ; adaptive control law ; kinematics ; facial and gender recognition ; single actuator ; victim-detection ; shape memory alloys ; undiscovered sensor values ; discomfort ; Differential Evolution ; numerical evaluation ; quadruped robot ; coverage path planning ; localization ; MPC ; n/a ; fault diagnosis ; neural networks ; disturbance-rejection control ; sample gathering problem ; cart ; bio-inspired robot ; opposite angle-based exact cell decomposition ; optimization ; safety ; goal exchange ; hierarchical planning ; ocean current ; robot motion ; nonlinear differentiator ; mapping ; finite-time currents observer ; Newton iteration ; inverse kinematics ; deposition uniformity ; spatial pyramid pooling ; hierarchical path planning ; end effector ; head-raising ; fault recovery ; LOS ; path tracking ; non-inertial reference frame ; step climbing ; obstacle avoidance ; sliding mode control ; symmetrical adaptive variable impedance ; lane change ; quadcopter UAV ; singularity analysis ; biped mechanism ; fault-tolerant control ; dynamic neural networks ; mobile robots ; data association ; UAV ; enemy avoidance ; reinforcement learning ; grip optimization ; safety recovery mechanism ; exoskeleton ; dynamic environment ; uncertain environments ; hybrid bionic robot ; potential field ; robot navigation ; cleaning robot ; unmanned aerial vehicle ; non-singular fast-terminal sliding-mode control ; contact planning ; Lyapunov-like function ; piezoelectric actuator ; transition mode ; non-prehensile manipulation ; multiple mobile robots ; Tetris-inspired ; real-time action recognition ; integral line-of-sight ; topological map ; alpine ski ; target tracking ; closed-loop detection ; working efficiency ; mathematical modeling ; curve fitting ; force control ; biped robots ; NSGA-II ; mobile robot ; load carriage ; prescription map translation ; artificial fish swarm algorithm ; Q-networks ; self-reconfigurable robot ; G3-continuity ; autonomous vehicle ; loop closure detection ; excellent driver model ; robots ; graph representation ; regional growth ; target assignment ; evolutionary operators ; intelligent mobile robot ; motion sensor ; exploration ; droplets penetrability ; dynamic uncertainty ; simultaneous localization and mapping (SLAM) ; area decomposition ; multi-criteria decision making ; 4WS4WD vehicle ; biped climbing robots ; skiing robot ; ROS ; decision making ; smart materials ; centrifugal force ; missile control system ; formation of robots ; electro-rheological fluids ; pneumatics ; variable spray ; inertial measurement unit (IMU) ; Robot Operating System ; trajectory interpolation ; formation control ; immersion and invariance ; dragonfly ; parallel navigation ; harmonic potential field ; pallet transportation ; mobile robot navigation ; negative-buoyancy ; grip planning ; manipulator ; position control ; external disturbance ; legged robot ; passive skiing turn ; autonomous underwater vehicle (AUV) ; gait cycle ; path planning ; sliding mode observer ; dynamic gait ; self-learning ; polyomino tiling theory ; coalmine ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Modeling of electrophysiology and tension development in the human heart (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Comprehension of the beating of the human heart is important for cardiac research and will improve many clinical applications. Simulations based on models describing cardiac electro-mechanics can acquire insights into this behavior. This work focuses on the mathematical reconstruction of electrophysiology, excitation conduction, and tension development in the human heart on the cellular and the tissue level. The tissue models represent accurate anatomical shapes of the atria and the ventricles and incorporate electrophysiological heterogeneity and anisotropic conduction. The simulations comprehend the physiological behavior of the ventricles and of the atrium including the sinoatrial node as well as pathological cases like ventricular and atrial fibrillation and genetic defects in ionic channels.
    Keywords: T1-995 ; Heterogenität ; Gewebe ; Kardiologie ; Computersimulation ; Ionenkanal ; Aktionspotenzial ; Erregung ; Elektrophysiologie ; Muskelfaser ; Kraft ; Tachykardie ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Flow control : theoretical concept of absolute instability (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: At the 37th Prandtl memorial lecture on Regions of Viccous Flow, H.Oertel 1994 developed for the first time the stability theory of local perturbations in boundary layers and wake flows, as well as their practical application in the flow control of vehicle flows and the boundary layer of civil aircraft wings.This work presents how the stability theory concept of absolute instability has advanced and proven in practice in the last 15 years in terms of the efficient flow control.
    Keywords: T1-995 ; Flow Control ; Fluid Mechanics ; Stability Theory ; Wake Flow ; Bundary Layer Transition ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
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    Modeling and Experimental Characterization of Nanocomposite Materials (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: This Special Issue gathers research from different branches of science and engineering disciplines working on experiments and modelling of nanocomposites into one volume. The Guest Editor welcomes papers dedicated to experimental, computational, and theoretical aspects dealing with many important state-of-the-art technologies and methodologies regarding the synthesis, fabrication, characterization, properties, design, and applications, and both finite element analysis and molecular dynamic simulations, of nanocomposite materials and structures. Full papers covering novel topics, extending the frontiers of the science and technology of nanoreinforced composites are encouraged. Reviews covering topics of major interest will be also considered.
    Keywords: TA1-2040 ; T1-995 ; ab initio ; critical yield strength ; carbon nanotube ; impact buckling ; elasticity ; molecular dynamics simulation ; magnetism ; coarse-grained model ; 3D fiber-metal laminates ; mechanical property ; interface ; nanocomposites ; interface force fields ; YN ; graphene/Fe composite ; cohesive element ; stability ; ScN ; delamination propagation ; interfaces ; graphene nanoplatelets ; nanoindentation ; pressure ; molecular dynamics ; piezoelectric property ; temperature effect ; Fe-Al ; hardness ; equivalent fiber ; disorder ; Fe3Al ; elastic modulus ; delamination buckling ; CNT agglomeration ; CNTs/epoxy nanocomposites ; boron nitride honeycomb ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Einfluss des Alkali/Niob-Verhältnisses und der Kupferdotierung auf das Sinterverhalten, die Strukturbildung und die Mikrostruktur von bleifreier Piezokeramik (K0,5Na0,5)NbO3 (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: Kalium-Natrium-Niobat (KNN) ist eine bleifreie ferroelektrische Keramik. Seine Herstellung ist aufgrund des hygroskopischen Verhaltens von Alkalikarbonat und Verdampfung bei hohen Temperaturen eine Herausforderung. Während des Herstellungsverfahrens wird die erwünschte Stöchiometrie schwanken. Undotierten und kupferdotierten KNN mit Alkali- oder Niobüberschüssen wurden hergestellt. Ihre Strukturbildung, Sinterverhalten, Mikrostrukturbildung und ihre elektrischen Eigenschaften werden untersucht.
    Keywords: T1-995 ; ferroelektrisch ; Stöchiometrie ; piezoelektrisch ; Keramik ; bleifrei ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TD Industrial chemistry and manufacturing technologies::TDC Industrial chemistry and chemical engineering::TDCQ Ceramic and glass technology
    Language: German
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    Measuring the Impact of Lean Techniques on Performance Indicators in Logistics Operations (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: 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 helped to close the gap between the disparities in the level of evidence mentioned above. A study was conducted that included 16 warehouses in an observation group and 56 warehouses in a control group. These significant results help close the gap in the evidence.
    Keywords: T1-995 ; Lean Management ; Lean Production ; schlanke Produktionssysteme ; Lager ; LogistikLean Management ; KPI ; Logistikzentren ; Lean Warehousing ; Logistics ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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    Unternehmensspezifisches Klassifikationssystem zur effizienten Datenverwaltung (mit Anwendungsszenarien aus der Praxis). Abschlußbericht des Verbundprojektes ""Klassifikationssysteme automatisiert erstellen"" (KLASTER) + 1 CD (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Innerhalb des zweijährigen Verbundprojektes KLASTER (Klassifikationssysteme automatisiert erstellen) wurde aufbauend auf den Ergebnissen des Vorgängerprojektes PAK (Produkte automatisch klassifizieren) ein Konzept erarbeitet und validiert, das eine Automatisierung des Klassifizierungsprozesses erlaubt. Während innerhalb von PAK die automatische Einordnung von Objekten in eine existierende Klassenstruktur behandelt wurde, beschäftigt sich KLASTER mit der automatischen Erstellung eines unternehmensspezifischen Klassensystems.Der vorliegende Abschlussbericht beschreibt neben dem Konzept ausführlich Anwendungsbeispiele bei den beteiligten Projektpartnern.
    Keywords: T1-995 ; Klassifikation ; Datenverwaltung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Spurführungsregelung eines aktiv gelenkten Radpaars für Straßenbahnen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: This work presents investigates the feasibility of the ""directly steered wheels (DSW)"" under operating condition of tramcars. After analyzing the wheel/rail geometric contact between track and DSW, a mathematical model has been developed to describe the lateral dynamics. Based on this model, a robust guidance controller is designed according to the µ-synthesis. The results of simulations show that the DSW with the designed controller can improve the running performance of tramcars significantly.
    Keywords: T1-995 ; aktive Spurführung ; active guidance ; directly steered wheels ; Straßenbahn&#956 ; -Synthesis ; µ-synthesis ; wheel/rail geometric contact ; Rad-Schiene-Kontaktkinematik ; aktiv gelenktes Radpaar ; tramcar ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    AlGaN/GaN-HEMT power amplifiers with optimized power-added efficiency for X-band applications (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: This work has arisen out of the strong demand for a superior power-added efficiency (PAE) of AlGaN/GaN high electron mobility transistor (HEMT) high-power amplifiers (HPAs) that are part of any advanced wireless multifunctional RF-system with limited prime energy. Different concepts and approaches on device and design level for PAE improvements are analyzed, e.g. structural and layout changes of the GaN transistor and advanced circuit design techniques for PAE improvements of GaN HEMT HPAs.
    Keywords: T1-995 ; MMIC design ; power amplifier ; AlGaN/GaN HEMT ; X-band ; power-added efficiency ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
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    Ansätze zur akustischen Optimierung von Reifen und Fahrbahnen für Elektrofahrzeuge unter Antriebsmoment (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: This work systematically describes the mechanisms of tyre/road noise atdriving and braking torque based on measurements with different tyres. The studies on the influence of circumferential force on tyre/road noise can be divided into two different tire tread designs. One sub-chapter reports about a selective influence of force induced tyre/road noise using inclined groove edges. The influence of the circumferential stiffness of the tread blocks on the tyre/road noise is discussed afterwards.
    Keywords: T1-995 ; Elektrofahrzeug ; electric vehicle ; Reifen-Fahrbahn-Geräusch ; Antriebsmomenttyre-road-noise ; driving torque ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Produktgestaltung an kolloidalen Agglomeraten und Gelen : Gelierung und Fragmentierung anorganisch gefällten Siliciumdioxids (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Amorphes Siliciumdioxid findet als Füllstoff verbreitet Anwendung. Es wird u.a. durch die Vermischung einer Silikatlösung mit einer Säure hergestellt. Dabei entsteht intermediär ein Gel. Mit dieser Arbeit wird ein Beitrag zur Steuerung der Eigenschaften des Produktpulvers geleistet. Es wird eine Formel vorgestellt, mit der die Gelierzeit aus den Konzentrationen der Einsatzstoffe abgeschätzt werden kann. Für die Fragmentierung des Gels werden Parallelen zum Aufbruch hochviskoser Tropfen gezeigt.
    Keywords: T1-995 ; Kolloide ; Gelierung ; Verfahrenstechnik ; Agglomeration ; Partikeltechnologie ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Advances in Food and By-Products Processing Towards a Sustainable Bioeconomy (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: The bioeconomy initially focused on resource substitution, including the production of biomass from various resources; its conversion, fractionation, and processing by means of biotechnology; and chemistry and process engineering towards the production and marketing of food, feed, fuel, and fibre. Nevertheless, although resource substitution is still considered important, the emphasis has been recently shifted to the biotechnological innovation perspective of the bioeconomy, in terms that ensure environmental sustainability. It is estimated that around one-third of the food produced for human consumption is wasted throughout the world, posing not only a sustainability problem related to food security but also a significant environmental problem. Food waste streams, mainly derived from fruits and vegetables, cereals, oilseeds, meat, dairy, and fish processing, have unavoidably attracted the interest of the scientific community as an abundant reservoir of complex carbohydrates, proteins, lipids, and functional compounds, which can be utilized as raw materials for added-value product formulations. This Special Issue focuses on innovative and emerging food and by-products processing methods for the sustainable transition to a bioeconomy era.
    Keywords: TP248.13-248.65 ; T1-995 ; ash content ; sorghum milling waste ; lipids ; compost ; oleic acid ; microbial oil ; bioprocess development ; glucoamylase ; fatty acid methyl esters ; oleaginous yeast ; integrated biorefineries ; biorefineries ; hydrophobic substrates ; food processing ; hydrophilicity ; biodiesel ; films ; biodegradability ; clarified butter sediment waste ; submerged fungal fermentation ; blood plasma protein powder ; Morchella ; hydrogels ; heat-induced gelation ; sustainability ; bacterial cellulose ; bioprocesses ; circular economy ; olive waste ; prebiotics ; Rhodosporidium toruloides ; carotenoids ; waste valorization ; glucosamine ; food-processing ; size exclusion chromatography (SEC) ; bioeconomy ; food waste valorization ; whey proteins ; arabinoxylan ; Ostwald ripening ; emulsion ; emulsifier ; food biotechnology ; drying method ; polysaccharides ; food packaging ; texture ; lactose esters ; morel mushrooms ; circular-economy ; solid state fermentation ; bioactive compounds ; edible films ; hydrolysis ; Aspergillus awamori ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TC Biochemical engineering::TCB Biotechnology
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    Numerische Untersuchung des Verformungs- und Bruchverhaltens von einkristallinem Wolfram auf mikroskopischer Ebene (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: The aim of the present work is to describe the deformation and fracture behavior of single crystal tungsten at the microscopic scale by using the ?nite element method. Therefore, the studies focus mainly on the in?uence of crystal orientation as well as the investigation of crack initiation and crack propagation. With a defined crack propagation model, the simulations of microbending allows for evaluating the details of the fracture process more accurately and supported the experimental studies.
    Keywords: T1-995 ; Microcracking ; Finite elements ; Crystal plasticity ; Wolframeinkristall ; KristallplastizitätSingle Crystal Tungsten ; Bruchzähigkeit ; Finite Elemente ; Mikrorißbildung ; Fracture toughness ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    High Voltage Engineering and Applications (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: This book is a collection of recent publications from researchers all over the globe in the broad area of high-voltage engineering. The presented research papers cover both experimental and simulation studies, with a focus on topics related to insulation monitoring using state-of-the-art sensors and advanced machine learning algorithms. Special attention was given in the Special Issue to partial discharge monitoring as one of the most important techniques in insulation condition assessment. Moreover, this Special Issue contains several articles which focus on different modeling techniques that help researchers to better evaluate the condition of insulation systems. Different power system assets are addressed in this book, including transformers, outdoor insulators, underground cables, and gas-insulated substations.
    Keywords: TA1-2040 ; T1-995 ; artificial neural network ; simulation ; high-frequency ; artificial flashover tests ; wide bandgap power modules ; tracking ; electrical field strength ; fast-rise square wave voltages ; FDTD simulation ; cable joint ; corona discharge ; feature selection ; post insulator ; earthing systems ; wind speed ; surface discharge ; oil/paper insulation ; oil-paper insulation ; high-magnitude currents and impulse polarity ; UFVM ; Tettex 9520 ; electrical tree ; flashover characteristics ; composite insulator ; partial discharge ; numerical modeling ; saline mechanism ; thermal parameters ; space charge density ; seasonal ; ion flow field ; denoising ; DDX 9121b ; temperature ; transformer asset management ; cavity discharge ; space/interface charge ; insulation health index ; heat transfer model ; leakage current ; machine learning ; partial discharges (PD) ; RF signal ; flashover ; high impulse conditions ; grounding electrodes ; generalized finite difference time domain ; curve fitting ; grounding ; plasma discharge ; outdoor insulators ; flashover dynamic model ; wavelet transform ; degradation ; thermal properties ; bipolar charge transport model ; UHF sensor ; cable ; random walk theory ; tracking test setup ; GIL ; pressure ; modelling ; non-uniform pollution between windward and leeward sides ; calibrator ; secondary arc ; polymeric insulation ; optical-UHF integrated detection ; shoreline ; dry band arcing ; photoelectric fusion pattern ; DDX 8003 ; XLPE ; silicone gel ; partial discharge modeling ; electric field analysis ; NSCT ; electrode’s geometry ; gas ; Comsol Multiphysics ; fast-impulses ; laying modes ; ageing ; cable ampacity ; residual resistance formulation ; finite element analysis ; thermal effect ; hydrophobicity ; soil resistivity ; charge simulation method ; short-circuit discharge ; dry band formation ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Bewertung der Energieeffizienz von Antriebssystemen mobiler Arbeitsmaschinen am Beispiel Bagger (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In this book a methodology for the evaluation of energy efficiency of mobile working machines by simulation is presented. It allows an efficiency analysis and systematic optimization of a single power train as well as a comparison of different power train concepts. The methodology is applied to a wheeled excavator. To ensure a realistic power demand in the simulation, a rule-based operator model is developed.
    Keywords: T1-995 ; simulation ; Energieeffizienz ; Bagger ; Mobile Arbeitsmaschinen ; Bewertungsmethodik ; Antriebssysteme ; Fahrermodellmobile machines ; excavator ; Simulation ; operator model ; energy efficiency ; evaluation methodology ; power trains ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Durchgängige Timing-Bewertung von Vernetzungsarchitekturen und Gateway-Systemen im Kraftfahrzeug (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Die steigende Anzahl von Elektrik-/Elektronik-Systemen im Automobil und damit verbunden das zunehmende Kommunikationsaufkommen stellen immer höhere Anforderungen an den Entwicklungsprozess. Aufgrund der wachsenden Anzahl an vernetzten Funktionen spielt die Betrachtung des Timing-Verhaltens der Systeme eine zentrale Rolle. Die Arbeit beschreibt eine Methodik, welche eine durchgängige Bewertung von Vernetzungsarchitekturen und Gateway-Systemen hinsichtlich deren Timing-Verhaltens ermöglicht.
    Keywords: T1-995 ; E/E-Architekturen ; Entwicklungsprozess ; Timing ; Vernetzungsarchitekturen ; Gateway-Systeme ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Sustainable Energy Systems Planning, Integration and Management (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: Energy systems worldwide are undergoing major transformation as a consequence of the transition towards the widespread use of clean and sustainable energy sources. Basically, this involves massive changes in technical and organizational levels together with tremendous technological upgrades in different sectors ranging from energy generation and transmission systems down to distribution systems. These actions generate huge science and engineering challenges and demands for expert knowledge in the field to create solutions for a sustainable energy system that is economically, environmentally, and socially viable while meeting high security requirements. This book covers these promising and dynamic areas of research and development, and presents contributions in sustainable energy systems planning, integration, and management. Moreover, the book elaborates on a variety of topics, ranging from design and planning of small- to large-scale energy systems to the operation and control of energy networks in different sectors, namely electricity, heat, ?and transport.
    Keywords: TA1-2040 ; T1-995 ; n/a ; Romanian coastal environment ; neural networks ; intermittent heating ; wind velocities ; time-space network ; optimal chiller loading (OCL) ; renewable energy ; pure electric buses ; mixed-integer non-linear programming problem (MINLP) ; control system ; FANP ; energy consumption ; load regulation ; energy ; smart box ; novel method ; smart logistics system ; multiple uncertainties ; non-intrusive load monitoring ; wind speed forecasting ; solid waste to energy plant ; uncertain cooling demand ; dual robust optimization ; Black Sea ; field test and numerical simulation ; electric power ; sustainable development ; multi-type bus operating organization ; cuckoo search algorithm ; vehicular emissions ; SWAN ; public transport ; product quality model ; MCDM ; TOPSIS ; heat transfer ; solar energy ; forecasting validity ; information gap decision theory (IGDT) ; photovoltaic systems ; configurations of internal wall ; ensemble empirical mode decomposition ; agricultural pruning ; hot summer and cold winter climate zone ; energy and environmental systems ; feature extraction ; information platform ; pruning biomass ; smart grid ; product usability testing ; meteorological variables ; fuzzy logic ; performance evaluation ; rural residential building ; threshold value of daily operation hours ; datacenter ; wave energy ; thermal comfort ; heat storage and release ; resampling ; risk aversion ; environment ; support vector machine ; internal coverings ; numerical models ; gradient descent ; renewable biomass energy ; demand response ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Zum Einfluss von Fahrzeug- und Straßenparametern auf die Ausbildung von Straßenunebenheiten (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Die vorliegende Arbeit untersucht den Einfluss unterschiedlicher Fahrzeug- und Straßenparameter auf die Ausbildung von longitudinalen Straßenunebenheiten. Hierzu wird ein abstrahiertes Fahrzeugmodell zur Abbildung der Vertikaldynamik von Lkw formuliert sowie ein phänomenologisches Gesetz zur Berechnung der bleibenden Straßenverformung verwendet. Mit Hilfe von analytischen und semianalytischen Methoden wird die Entwicklung einzelner Spektralanteile der Straßenoberfläche prognostiziert.
    Keywords: T1-995 ; Fahrzeugschwingungen ; Längsunebenheiten ; bleibende Verformung ; Parametereinfluss ; Fahrzeug-Straße-Interaktion ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 46
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    Funkkanalmodellierung für OFDM-Kommunikationssysteme bei Hochgeschwindigkeitszügen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In diesem Buch wird ein drahtloses OFDM-Kommunikationssystem für Hochgeschwindigkeitszüge analysiert, der Funkkanal modelliert und das Modell durch Messungen verifiziert. Mit Hilfe des Kanalmodells können drahtlose Zugkommunikationssysteme unter Berücksichtigung der hohen Zeitvarianz in optimaler Weise ausgelegt werden. Aus der Untersuchung verschiedener Einflüsse werden richtungsweisende Regeln für die Auslegung solcher Systeme abgeleitet und ein entsprechendes OFDM-System vorgeschlagen.
    Keywords: T1-995 ; Zeitvarianz ; OFDM-System ; Funkkanalmodellierung ; Hochgeschwindigkeitszüge ; drahtlose Kommunikation ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Effiziente MHz-Wechselrichter mit unipolaren SiC-Transistoren für Hochleistungs-Induktionslampen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: This work presents the design and investigation of a novel UV-lamp-system, which is based upon UV-induction lamps and a MHz-inverter equipped with normally-on junction field effect transistors (JFET). A system efficiency of some more than 27 % is verified with the prototype UV-induction lamp system, which positions between the two previous UV-systems and open up new fields of application.
    Keywords: T1-995 ; MHz-Wechselrichter ; Siliziumkarbid ; UV-disinfection ; resonant inverter ; UV-Induktionslampe ; UV-induction lamp ; Resonanzwechselrichter ; silicon carbide ; UV-DesinfektionMHz inverter ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Prüfplanung : ein neues Prozessmanagement für Fahrzeugprüfungen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Die Arbeit analysiert die Potentiale der Risikoanalyse für die Planung von Prüfungen, Tests und Wartungsmaßnahmen an technischen Systemen. Der Autor beschreibt ein Prozessmanagement zur Prüfplanung, welches die Definition von komponenten- und funktionsbezogenen Qualitätsmerkmalen, die Risikobewertung der Qualitätsmerkmale, sowie einen neuartigen numerischen Priorisierungsalgorithmus umfasst. Die Methode ist generisch formuliert, die Anwendung ist für Personenkraftwagen erläutert.
    Keywords: T1-995 ; Wartung ; Test ; Fahrzeugprüfung ; Prüfung ; Risikoanalyse ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Flow and Transport Properties of Unconventional Reservoirs 2018 (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: Unconventional reservoirs are usually complex and highly heterogeneous, such as shale, coal, and tight sandstone reservoirs. The strong physical and chemical interactions between fluids and pore surfaces lead to the inapplicability of conventional approaches for characterizing fluid flow in these low-porosity and ultralow-permeability reservoir systems. Therefore, new theories and techniques are urgently needed to characterize petrophysical properties, fluid transport, and their relationships at multiple scales for improving production efficiency from unconventional reservoirs. This book presents fundamental innovations gathered from 21 recent works on novel applications of new techniques and theories in unconventional reservoirs, covering the fields of petrophysical characterization, hydraulic fracturing, fluid transport physics, enhanced oil recovery, and geothermal energy. Clearly, the research covered in this book is helpful to understand and master the latest techniques and theories for unconventional reservoirs, which have important practical significance for the economic and effective development of unconventional oil and gas resources.
    Keywords: TA1-2040 ; T1-995 ; shale gas ; permeability ; prediction by NMR logs ; matrix–fracture interaction ; faults ; remaining oil distributions ; unconventional reservoirs ; coal deformation ; reservoir depletion ; carbonate reservoir ; nanopore ; fracturing fluid ; pseudo-potential model ; shale reservoirs ; matrix-fracture interactions ; multi-scale fracture ; succession pseudo-steady state (SPSS) method ; fluid transport physics ; integrated methods ; chelating agent ; dissolved gas ; non-equilibrium permeability ; effective stress ; fractal ; fracture network ; spontaneous imbibition ; tight oil ; porous media ; 0-1 programming ; the average flow velocity ; geothermal water ; micro-fracture ; pore types ; pore network model ; petrophysical characterization ; nitrogen adsorption ; analysis of influencing factors ; mudstone ; rheology ; velocity profile ; shale permeability ; flow resistance ; global effect ; tight sandstones ; fractal dimension ; contact angle ; temperature-resistance ; fractured well transient productivity ; reservoir classifications ; deep circulation groundwater ; viscosity ; NMR ; fractional diffusion ; lattice Boltzmann method ; multiporosity and multiscale ; fractal geometry ; imbibition front ; productivity contribution degree of multimedium ; wetting angle ; pH of formation water ; enhanced oil recovery ; isotopes ; tight sandstone ; fracture diversion ; shale ; SRV-fractured horizontal well ; low-salinity water flooding ; shale gas reservoir ; tight reservoirs ; fracture continuum method ; tight oil reservoir ; Lucaogou Formation ; hydraulic fracturing ; clean fracturing fluid ; recovery factor ; flow regimes ; local effect ; complex fracture network ; pore structure ; gas adsorption capacity ; polymer ; non-linear flow ; conformable derivative ; production simulation ; analytical model ; enhanced geothermal system ; multi-scale flow ; experimental evaluation ; extended finite element method ; fluid-solid interaction ; groundwater flow ; well-placement optimization ; thickener ; imbibition recovery ; equilibrium permeability ; slip length ; large density ratio ; clay mineral composition ; finite volume method ; volume fracturing ; influential factors ; sulfonate gemini surfactant ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Diffraktive Optiken im Automobil - Achromatisierung, Athermalisierung, Formung von Scheinwerferlichtverteilungen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: The complexity of optical systems in headlamps is increasing rapidly. This leads to new design concepts, but it is also leading to increasing influence of aberrations. This work is dealing with the minimization of chromatical and thermal effects by using diffractive optics. Therefore, a new lens design in combination with the optical simulation of diffractive structures based on ray tracing is presented.
    Keywords: T1-995 ; Athermalisierung ; headlamp ; Achromatisierung ; diffractive ; athermalization ; Optikachromatization ; Scheinwerfer ; diffraktiv ; optics ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
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    Thin Film Transistor (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: Recently, new wide-band energy gap semiconductors can be grown by ALD, PLD, sputtering, or MOCVD. They have great potential for the fabrication and application to TFTs. Inorganic semiconductors have good stability against environmental degradation over their organic counterparts, whereas organic materials are usually flexible, transparent, and when solution-processed at low temperatures, are prone to degradation when exposed to heat, moisture, and oxygen. For this Special Issue, we invited researchers to submit papers discussing the development of new functional and smart materials, and inorganic as well as organic semiconductor materials, such as ZnO, InZnO, GaO, AlGaO, AnGaO, AlN/GaN, conducting polymers, molecular semiconductors, perovskite-based materials, carbon nanotubes, carbon nanotubes/polymer composites, and 2D materials (e.g., graphene, MoS2) and their potential applications in display drivers, radio frequency identification tags, e-paper, gas, chemical and biosensors, to name but a few.
    Keywords: TA1-2040 ; TK1-9971 ; T1-995 ; charge transport and injection mechanisms ; optical synaptic devices ; flat panel displays ; simulation ; persistent photoconductivity ; hydrogen ; interdigitated ; interface state trap density ; technology computer aided design (TCAD) ; oxygen defects ; Corbino ; transistor model evaluation ; metal-halide lamp ; InGaZnOx ; contact resistances ; chemical treatment ; colour difference ; organic transistor ; equivalent circuit ; channel-length dependence ; just noticeable difference ; oxide semiconductor ; OTFT ; chromaticity ; modeling contact effects ; oxygen deficiency ; dual-threshold inverter ; surface treated ; charge-carrier-mobility extraction ; optical detecting ; thin film transistor ; green ; photo-sensors ; modelling ; capacitor ; TFT-LCD ; organic thin-film transistor ; spectrum ; hydrogen effect ; organic film growth ; transparent conducting oxides ; quartz-halogen lamp ; optical ; blue LED ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Image Analysis and Evaluation of Cylinder Bore Surfaces in Micrographs (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: This work presents two image-based inspection approaches for the quality evaluation of cylinder bore surfaces. In the first algorithm, metal folds on plateau-honed surfaces are inspected with scanning electron microscopy. An edge-aware structure tensor is proposed for feature extraction and localization of surface defects. The second algorithm uses a morphgraphical method for detecting graphite grains in optical micrographs. Based on the inspection results, quality parameters are proposed.
    Keywords: T1-995 ; image processing ; Bildverarbeitung ; Kantendetektion ; Mikrographhoning ; micrograph ; automated vision inspection ; Honung ; edge detection ; Automatische Sichtprüfung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
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    Simulation von Fahrspielen und Energieflüssen in Nahverkehrssystemen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: For ecological und economic reasons, special attention is paid to the energy balance of rail-bound, local, direct current-based transport systems. With the tram and urban railway network of Karlsruhe being used as an example, 16 simulation scenarios with different measures for energy optimization are analysed in a coupled computation of driving cycles and energy flows.
    Keywords: T1-995 ; energy flow calculation ; driving cycle simulation ; Fahrspielsimulation ; Energieflussberechnung ; local transport system ; Nahverkehrssystem ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Ontologie-basierte Definition von Anforderungen an Validierungswerkzeuge in der Fahrzeugtechnik (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Validation and verification are central activities of product engineering. The aim of these activities is to predict and evaluate the future system behaviour of the product in development. This is achieved by conducting tests and interpreting the generated measurement data. This work introduces an ontology-based method for increasing the efficiency and effectively of innovative automotive development projects, especially in cases where an organisational knowledge base does not exist yet.
    Keywords: T1-995 ; Wissensmanagement ; Validierung ; ProduktentwicklungAutomobile technology ; knowledge management ; Fahrzeugtechnik ; validation ; product engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Duktilisierung von Wolfram : Synthese, Analyse und Charakterisierung von Wolframlaminaten aus Wolframfolie (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Der in dieser Arbeit untersuchte Ansatz ist die Duktilisierung von Wolfram durch Synthese eines Wolframlaminats. Da Wolframfolie duktil ist und sich selbst bei Raumtemperatur plastisch verformen lässt, könnte es durch Übereinanderschichten und geeignetes Verbinden mehrerer Folienlagen gelingen, die duktilen Eigenschaften der Wolframfolie auf ein Massivbauteil zu übertragen.
    Keywords: T1-995 ; Laminate ; Wolfram ; Duktilisierung ; Wolframlaminate ; Wolframfolie ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Environmental Impact Assessment of Buildings (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: This Special Issue covers a wide range of areas—including building orientation, service life, use of photocatalytically active structures and PV facades, implications of transportation system, building types (i.e., high rise, multilevel, commercial, residential), life cycle assessment, and structural engineering—that need to be considered in the environmental impact assessment of buildings, and the chapters include case studies across the globe. Consideration of these strategies would help reduce energy and material consumption, environmental emissions, and waste generation associated with all phases of a building’s life cycle. Chapter 1 demonstrates that green star concrete exhibits the same structural properties as conventional concrete in Australia. Chapter 2 showed that the use of TiO2 as a photocatalyst on the surface of construction materials with a suitable stable binding agent, such as aggregates, would enable building walls to absorb NOx from air. This study found that TiO2 has the potential to reduce ambient concentrations of NOx from areas where this pollutant becomes concentrated under solar irradiation. Chapter 3 presents the life cycle assessment of architecturally integrated glass–glass photovoltaics in building facades to find the appropriate material composition for a multicolored PV façade offering improved environmental performance. Chapter 4 shows that urban office buildings lacking appropriate orientation experienced indoor overheating. Chapter 5 details four modeling approaches that were implemented to estimate buildings’ response towards load shedding. Chapter 6 covers the life cycle GHG emissions of high-rise residential housing block to discover opportunities for environmental improvement. Chapter 7 discusses an LCA framework that took into account variation in the service life of buildings associated with the use of different types of materials. Chapter 8 presents a useful data mining algorithm to conduct life cycle asset management in residential developments built on transport systems.
    Keywords: TA1-2040 ; T1-995 ; wash water ; greenhouse gases ; environmental life cycle assessment ; sustainable-development ; transit-policy ; public-engagement ; Multilevel buildings ; building integrated photovoltaic ; slag ; operational energy ; life-cycle social analysis ; building ; travel-satisfaction ; TEASER ; BIPV ; photocatalytic construction materials ; functionalized aggregate ; green star concrete ; work-commute ; shallow plan forms ; life cycle assessment ; recycled aggregate ; environmental remediation ; block of buildings ; rain cladding ; LCA ; sustainability ; peak shaving ; residential building ; indoor overheating ; LCI ; air pollution ; environmental performance ; service life ; nitric oxides ; thermal model ; coloured glass ; demand response ; modal-variability ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Spaltverhalten von Holz beim Eindrehen von selbstbohrenden Holzschrauben (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Für Verbindungen im Holzbau werden häufig selbstbohrende Holzschrauben eingesetzt. Diese können oft mit geringen Abständen untereinander und zu den Bauteilrändern angeordnet werden. Durch die Einhaltung von Mindestabständen und Mindestholzdicken soll hierbei ein Versagen des Holzes durch Aufspalten verhindert werden. Im Rahmen dieser Arbeit wurde ein Verfahren entwickelt, mit dem sich die Anforderungen an Abständen und Holzdicken effizienter und zuverlässiger als bisher bestimmen lassen.
    Keywords: T1-995 ; Mindestabstände ; Holzschrauben ; Holzbau ; Verbindungen ; Spaltversagen ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
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    The Effects of Internal Stress and Lithium Transport on Fracture in Storage Materials in Lithium-Ion Batteries (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Fracture of storage particles is considered to be one of the major reasons for capacity fade and increasing power loss in Li-ion batteries. In this work, we tackle the problem by merging a coupled model of mechanical stress and diffusion of Li-ions with a phase field description of an evolving crack. The novel approach allows us to study the evolution of the Li concentration together with the initiation and growth of a crack in an arbitrary geometry and without presuming a specific crack path.
    Keywords: T1-995 ; Lithium-Diffusion ; Lithium-Ionen-BatterienCrack Growth ; Storage Particles ; Risswachstum ; Phasefield ; Li-Diffusion ; Phasenfeld ; Li-Ion-Batteries ; Speicherpartikel ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
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  • 59
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    Creep and High Temperature Deformation of Metals and Alloys (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: By the late 1940s, and since then, the continuous development of dislocation theories have provided the basis for correlating the macroscopic time-dependent deformation of metals and alloys—known as creep—to the time-dependent processes taking place within the metals and alloys. High-temperature deformation and stress relaxation effects have also been explained and modeled on similar bases. The knowledge of high-temperature deformation as well as its modeling in conventional or unconventional situations is becoming clearer year by year, with new contemporary and better performing high-temperature materials being constantly produced and investigated.This book includes recent contributions covering relevant topics and materials in the field in an innovative way. In the first section, contributions are related to the general description of creep deformation, damage, and ductility, while in the second section, innovative testing techniques of creep deformation are presented. The third section deals with creep in the presence of complex loading/temperature changes and environmental effects, while the last section focuses on material microstructure–creep correlations for specific material classes. The quality and potential of specific materials and microstructures, testing conditions, and modeling as addressed by specific contributions will surely inspire scientists and technicians in their own innovative approaches and studies on creep and high-temperature deformation.
    Keywords: TA1-2040 ; T1-995 ; TN1-997 ; Larson–Miller parameter ; n/a ; visualization ; bond coat ; hydrogen ; poly-crystal ; Gibbs free energy principle ; constitutive equations ; creep damage ; DFT ; finite element method ; austenitic stainless steel ; strain rate sensitivity ; MCrAlY ; excess volume ; superalloy ; scanning electron microscopy ; creep buckling ; dislocation dynamics ; creep ; elevated temperature ; modelling ; size effect ; residual stress ; superalloy VAT 32 ; water vapor ; activation energy ; small angle neutron scattering ; superalloy VAT 36 ; metallic glass ; iron aluminides ; Gr.91 ; internal stress ; relaxation fatigue ; multiaxiality ; creep grain boundary ; grain boundary cavitation ; cavitation ; solute atom ; stress exponent ; external pressure ; P92 ; TMA ; low cycle fatigue ; nanoindentation ; high temperature ; FEM ; intrinsic ductility ; normalizing ; creep ductility ; creep rupture mechanism ; microstructural features ; simulate HAZ ; P92 steel ; glide ; ferritic–martensitic steel ; creep rupture ; cyclic softening ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Konditionierung von biogenen Energieträgern aus den Produkten der bioliq®-Schnellpyrolyse (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Within the bioliq®-process, the organic phase of straw pyrolysis condensates can be gasified directly, while the aqueous phase can be mixed with char to form a slurry, which also can be gasified. For production and storage, several mixers and stirrers are examined. Grinding the porous and elongated char particles decelerates sedimentation and also reduces the viscosity. Thus, higher concentrated slurries can be mixed, which leads to higher stability.
    Keywords: T1-995 ; Pyrolysekondensat ; Vergasungchar ; pyrolysis condensate ; gasification ; Suspension ; Mischen ; slurry ; mix ; Koks ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Thermal and Electro-thermal System Simulation (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: With increasing power levels and power densities in electronics systems, thermal issues are becoming more and more critical. The elevated temperatures result in changing electrical system parameters, changing the operation of devices, and sometimes even the destruction of devices. To prevent this, the thermal behavior has to be considered in the design phase. This can be done with thermal end electro-thermal design and simulation tools. This Special Issue of Energies, edited by two well-known experts of the field, Prof. Marta Rencz, Budapest University of Technology and Economics, and by Prof. Lorenzo Codecasa, Politecnico di Milano, collects twelve papers carefully selected for the representation of the latest results in thermal and electro-thermal system simulation. These contributions present a good survey of the latest results in one of the most topical areas in the field of electronics: The thermal and electro-thermal simulation of electronic components and systems. Several papers of this issue are extended versions of papers presented at the THERMINIC 2018 Workshop, held in Stockholm in the fall of 2018. The papers presented here deal with modeling and simulation of state-of-the-art applications that are highly critical from the thermal point of view, and around which there is great research activity in both industry and academia. Contributions covered the thermal simulation of electronic packages, electro-thermal advanced modeling in power electronics, multi-physics modeling and simulation of LEDs, and the characterization of interface materials, among other subjects.
    Keywords: TA1-2040 ; T1-995 ; thermal interface material ; thermal aging ; modeling ; LED compact thermal models ; niobium pentoxide ; model-order reduction ; ferromagnetic cores ; LED digital twin ; Cauer RC ladder ; in-situ characterization ; electronic packages ; time domain thermoreflectance ; multi-domain compact model ; power LEDs ; DC–DC converters ; structure function ; boundary condition independent ; electric aircraft ; multi-LED ; modelling ; light emitting diodes ; thin film ; JEDEC metrics ; tool agnostic ; power losses ; switching ; dynamic thermal compact model ; thermal transient testing ; reliability ; thermal transient analysis ; thermal simulation ; non-destructive testing ; IGBT ; carbon nanotubes ; compact thermal model ; power semiconductor devices ; SPICE ; phosphor light conversion ; thermal management ; LED luminaire design ; design flow ; thermal characterization ; motor cooling ; thermal phenomena ; silicone dome ; LED ; secondary heat path ; multi-domain modelling ; heating and optical power ; transient analysis ; thermal testability ; thermal conductivity ; multiple heat source ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
    Language: English
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    Optimization Methods Applied to Power Systems: Volume 2 (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: This book presents an interesting sample of the latest advances in optimization techniques applied to electrical power engineering. It covers a variety of topics from various fields, ranging from classical optimization such as Linear and Nonlinear Programming and Integer and Mixed-Integer Programming to the most modern methods based on bio-inspired metaheuristics. The featured papers invite readers to delve further into emerging optimization techniques and their real application to case studies such as conventional and renewable energy generation, distributed generation, transport and distribution of electrical energy, electrical machines and power electronics, network optimization, intelligent systems, advances in electric mobility, etc.
    Keywords: TA1-2040 ; T1-995 ; n/a ; Stackelberg game ; MILP ; optimal congestion threshold ; magnetic field mitigation ; simulation ; multi-objective particle swarm optimization ; virtual power plant ; internal defect ; day-ahead load forecasting ; neural network ; modular predictor ; multi-objective particle swarm optimization algorithm ; stochastic optimization ; dragonfly algorithm ; unit commitment ; metaheuristic ; multi-population method (MP) ; optimization ; tabu search ; considerable decomposition ; loss minimization ; active distribution system ; islanded microgrid ; dynamic solving framework ; feature selection ; electric energy costs ; power factor compensation ; dependability ; interactive load ; overhead ; energy internet ; evolutionary computation ; wind power ; developed grew wolf optimizer ; underground ; ETAP ; fuzzy algorithm ; electric vehicles ; Schwarz’s equation ; evolutionary algorithms ; electric power contracts ; congestion management ; optimizing-scenarios method ; building energy management system ; particle encoding method ; ringdown detection ; HOMER software ; DC optimal power flow ; prosumer ; constrained parameter estimation ; distributed generations (DGs) ; strong track filter (STF) ; transient stability ; calibration ; cost minimization ; radiance ; decentralized and collaborative optimization ; hybrid renewable energy system ; renewable energy sources ; rural electrification ; distribution network reconfiguration ; interval variables ; optimization methods ; particle swarm optimization ; hierarchical scheduling ; micro grid ; AC/DC hybrid active distribution ; consensus ; artificial bee colony ; CCHP system ; data center ; support vector machine ; affinity propagation clustering ; extended Kalman filter ; affine arithmetic ; linear discriminant analysis (LDA) ; current margins ; heterogeneous networks ; Cameroon ; hybrid method ; distributed heat-electricity energy management ; discrete wind driven optimization ; fitness function ; cross-entropy ; GenOpt ; wind energy ; demand uncertainty ; UC ; off-design performance ; genetic algorithm ; energy storage ; the biomimetic membrane computing ; power system optimization ; electric vehicle ; power architectures ; economic load dispatch problem (ELD) ; runner-root algorithm (RRA) ; Cable joint ; battery energy storage system ; load curtailment ; integration assessment ; power system unit commitment ; artificial lighting ; power flow ; hybrid membrane computing ; two-point estimation method ; low-voltage networks ; demand bidding ; non-sinusoidal circuits ; energy flow model ; power transfer distribution factors ; sustainability ; HVAC system ; voltage deviation ; street light points ; radial basis function ; energy storage system ; charging/discharging ; power systems ; intelligent scatter search ; MV/LV substation ; optimal power flow ; stochastic state estimation ; eight searching sub-regions ; chaos optimization algorithm (COA) ; mutual information theory ; inter-turn shorted-circuit fault (ISCF) ; C&I particle swarm optimization ; multiobjective optimization ; passive shielding ; sub-Saharan Africa ; micro-phasor measurement unit ; geometric algebra ; bio-inspired algorithms ; adaptive consensus algorithm ; energy management ; PCS efficiency ; multi-stakeholders ; generalized generation distribution factors ; the genetic algorithm based P system ; JAYA algorithm ; thermal probability density ; power optimization ; pumped-hydro energy storage ; smart grid ; two-stage feature selection ; piecewise linear techniques ; photovoltaic ; SOCP relaxations ; switched reluctance machine (SRM) ; optimal reactive power dispatch ; optimal operation ; controllable response ; off-grid ; active shielding ; transformer-fault diagnosis ; IEEE Std. 80-2000 ; principal component analysis ; demand response ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Marine Structures (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2022-01-31
    Description: Structural mechanics is an important field of engineering. The main goal of structural mechanics is to ensure that structures are safe and durable so that catastrophic situations can be prevented, which can otherwise cause loss of life, environmental pollution and financial losses. Depending on the uses of the structure and the conditions that the structure is subjected to, special treatment may be required for the analysis. Specifically, marine structures are subjected to harsh environmental conditions due to the marine environment, which can cause several different damage mechanisms including fatigue and corrosion. This book on “Marine structures” considers a wide range of areas related to marine structures and provides a compilation of numerical and experimental studies related to “Marine structures” research.
    Keywords: TC1501-1800 ; TA1-2040 ; T1-995 ; shock loads ; n/a ; jacket structures ; protective device ; tripod support structures ; soil-pile-structure interaction ; acoustic metamaterials ; semi-active ; jacket platform ; solitons ; waves ; biofouling ; seawater piping systems ; motion response ; earthquake ; low-frequency sound ; failure mechanism ; free-surface flow ; depressed bottom ; performance prediction ; acoustic band gap ; marine growth ; uncoupled analysis ; towing resistance ; viscous fluid flow ; ice-induced vibration ; superelement ; anti-collision assessment ; peridynamics ; steel ; integrated numerical model ; fairlead position ; reliability ; cross-flow ; coupled analysis ; morphology evolution ; composites ; tuned mass damper ; towing method ; wave loading ; vortex-induced vibration ; coastal protection structures ; structural control ; vortical flow ; critical mass ratio ; flexible pipe ; stochastic modeling ; offshore wind turbine ; hydrodynamics ; high pressure ; offshore integrated meteorological mast (OIMM) ; ice-resistant cone ; sediment transport ; offshore wind ; thermomechanical ; corrosion detection
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    Entwicklung supraleitender, strombegrenzender Transformatoren (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Durch den Einsatz von Hochtemperatursupraleitern (HTSL) können Verluste, Volumen und Gewicht von Transformatoren reduziert werden, zudem werden diese aktiv Fehlerstrom begrenzend. In dieser Arbeit wurde die Rückkühlung von YBCO-Bandleitern nach einer Strombegrenzung untersucht. Weiterhin wurde ein Entwurfsgang für HTSL-Transformatoren erstellt und ein 60 kVA-Transformator entworfen und getestet. Darüber hinaus wurde eine Fallstudie zur Energieeinsparung durch HTSL-Transformatoren erstellt.
    Keywords: T1-995 ; Anwendung der Supraleitung ; YBCO-Bandleiter ; Hochtemperatursupraleitung ; Strombegrenzung ; Transformatoren ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Analyse der mechanischen Randbedingungen zur Adaption der oszillierenden Hinterschneidtechnik an einen Mobilbagger (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: The oscillating disc cutting process has shown excellent results in precisely removing area-limited-concrete structures. Due to the highly dynamic oscillatory motion, the stiffness requirements to the tool structure and the basic machine have to be considered, which is the main purpose of this work. Based on these results, a concept of a mechanical adaption of the oscillating disc cutting process to an excavator attachment tool will be developed and tested on a prototype.
    Keywords: T1-995 ; system analysis ; MobilbaggerDisc Cutting ; Werkzeugadaption ; Systemanalyse ; stiffness requirement ; Hinterschneidtechnik ; Steifigkeitsanforderung ; Wheeled Excavator ; tool adaption ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Antimicrobial Resistance in Environmental Waters (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: This Special Issue on Antimicrobial Resistance in Environmental Waters features 11 articles on the monitoring and surveillance of antimicrobial resistance (AMR) in natural aquatic systems (i.e., reservoirs, rivers), and effluent discharge from water treatment plants to assess the effectiveness of AMR removal and resulting loads in treated waters. Some of the key elements of AMR studies presented in this Special Issue highlight the underlying drivers of AMR contamination in the environment and the evaluation of the hazard imposed on aquatic organisms in receiving environments through ecological risk assessments. As described in this Issue, screening antimicrobial peptide (AMP) libraries for biofilm disruption and antimicrobial candidates are promising avenues for the development of new treatment options to eradicate resistance.
    Keywords: TA1-2040 ; T1-995 ; TA170-171 ; risk assessment ; reuse water ; Acinetobacter junii ; Escherichia coli ; co-occurrence pattern ; EPS ; wastewater treatment plant ; UV-disinfection ; biofilm ; estuary reservoir ; Environmental Waters ; antibiotic resistance genes ; antimicrobial peptide (AMP) ; wastewater ; tertiary media filtration ; Psl ; antibiotic-resistant strains ; drinking water treatment plants ; water ; sediment ; surface water ; gastrointestinal infections ; Acinetobacter baumannii ; metal resistance genes ; metagenomics ; water reuse ; bacterial community ; antibiotics ; ERIC-PCR ; river-reservoir system ; the Yellow River ; ecological risk assessment ; aquatic environment ; wastewater treatment ; sand settling reservoirs ; antibiotic resistance gene ; environmental ecology ; antibiotic resistance ; ESBL ; water treatment plants ; Pseudomonas aeruginosa ; chlorination ; irrigation water ; exopolysaccharide ; fecal indicator bacteria ; Antimicrobial Resistance ; persistence ; Qingcaosha reservoir ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Silicon-Organic Hybrid Platform for Photonic Integrated Circuits (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: We study the potential of the silicon-organic hybrid (SOH) platform for integrated optics. The unique properties of selected organic materials are added to silicon devices made with CMOS-based processes. We investigate the feasibility of this approach by making prototypes of key components in form of photonic integrated circuits: SOH lasers and SOH modulators are designed, fabricated, post-processed, and characterized. Application scenarios are identified.
    Keywords: T1-995 ; CMOS ; Modulator ; laser ; modulator ; Silizium-Photonik ; Laser ; Detektor ; CMOSsilicon photonics ; detector ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
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    Nichtlineare Modellierung von Ferroelektrika unter Berücksichtigung der elektrischen Leitfähigkeit (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In dieser Arbeit wird ein Simulationswerkzeug zur Untersuchung des komplexen elektromechanischen Verhaltens von Ferroelektrika entwickelt. Es wird ein neues Materialmodell vorgestellt, das die elektrische Leitfähigkeit der Ferroelektrika berücksichtigt. Anhand von anwendungsnahen Beispielen wird der Einfluss der elektrischen Leitfähigkeit untersucht.
    Keywords: T1-995 ; Ferroelektrika ; Materialmodell ; Finite-Elemente-Methode ; elektrische Leitfähigkeit ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Biegefestigkeit von Brettschichtholz-Hybridträgern mit Randlamellen aus Buchenholz und Kernlamellen aus Nadelholz (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In der Forschungsarbeit wird die Verwendung von Nadelholz statt Buchenholz im weniger biegebeanspruchten Kernbereich von Brettschichtholz untersucht. Es wird anhand von Versuchen und mithilfe von numerischen Methoden gezeigt, dass sich mit so genannten Hybridträgern hohe Festigkeitswerte und geringere Materialkosten als bei reinen Buchenträgern miteinander vereinen lassen.
    Keywords: T1-995 ; Fichte ; Tan ; Brettschichtholz ; Keilzinkung ; Vollwandträger ; Rotbuche ; Biegefestigkeit ; Nadelholz ; Buchenholz ; Fichtenholz ; Elastizitätsmodul ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Gleisselektive Ortung von Schienenfahrzeugen mit bordautonomer Sensorik (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In dieser Arbeit wird eine gleisselektive, bordautonome Ortungsplattform für Schienenfahrzeuge unter Verwendung diversitärer, redundanter Sensoren vorgestellt. Durch die Verwendung eines neuartigen Wirbelstrom-Sensorsystems in Kombination mit inertialer Sensorik, GPS und einer digitalen Streckenkarte werden die Anforderungen an eine sicherheitsrelevante Ortungsplattform erfüllt. Hierbei werden unterschiedliche Fusionsansätze hergeleitet und anhand realer Messdaten bewertend verglichen.
    Keywords: T1-995 ; Map-Matching ; Schienenfahrzeuge ; Ortung ; Weichenerkennung ; Kalman-Filter ; Wirbelstrom-Sensorsystem ; Integriertes Navigationssystem ; Informationsfusion ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Integrated Role of Nutrition and Physical Activity for Lifelong Health (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: As computer and space technologies have been developed, geoscience information systems (GIS) and remote sensing (RS) technologies, which deal with the geospatial information, have been rapidly maturing. Moreover, over the last few decades, machine learning techniques including artificial neural network (ANN), deep learning, decision tree, and support vector machine (SVM) have been successfully applied to geospatial science and engineering research fields. The machine learning techniques have been widely applied to GIS and RS research fields and have recently produced valuable results in the areas of geoscience, environment, natural hazards, and natural resources. This book is a collection representing novel contributions detailing machine learning techniques as applied to geoscience information systems and remote sensing.
    Keywords: TA1-2040 ; T1-995 ; n/a ; sport games ; compensatory eating ; breath test ; exercise-induced anorexia ; Fitbit ; nutrition education ; senescence ; body weight ; sport nutrition ; fitness ; long-term follow-up ; self-efficacy ; protein ; food consumption ; cytokines ; physical exercise ; cardiometabolic health ; mediation analyses ; obesity ; food choice ; telomere length ; sporting events ; carbohydrates ; free radicals ; marathon ; adolescents ; movement skills ; naturally enriched 13C-milk proteins ; behavioral intervention ; acute exercise ; skeletal muscle damage ; Protein ; TERRA ; nutrition ; telemonitoring ; Latino ; adolescent ; macronutrients ; metabolism ; mechanisms of impact ; anabolic competence ; endurance exercise ; food healthiness ; exercise ; health promotion ; behavioral economics ; immunity ; stunting ; lifestyle intervention ; running ; telomerase ; dietary intake ; inflammation ; vegetarian ; recreational athlete ; physical performance ; out-of-home eating ; diet ; overweight ; dietary restriction ; soccer ; dual burden of malnutrition ; protein shake ; childhood memories ; chronic diseases ; music events ; oxidation ; added sugar ; lifestyle change ; vegan ; nudges ; food ; physical activity ; half-marathon ; health conscious ; free or reduced lunch ; low-income ; diet quality ; National School Lunch Program ; older adults ; aging ; sport spectators ; chronic low-grade systemic inflammation ; sport ; food intake ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
    Language: English
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    Numerical Modeling of Stagnation Flows over Porous Catalytic Surfaces (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In this book, stagnation flows on a catalytic porous plate is modeled one-dimensionally coupled with multi-step surface reaction mechanisms and molecular transport (diffusion and conduction) in the flow field and in the porous catalyst. Internal and external mass transfer limitations as well as possible reaction routes in the catalyst are investigated for CO oxidation, WGS reaction, partial and steam reforming of methane over Rh/Al?O?.
    Keywords: T1-995 ; Heterogeneous catalysis ; Stofftransportlimitierungen ; Reaktion-DiffusionStagnation-flow reactor ; Staupunktreaktor ; Reaction-Diffusion ; Heterogenen Katalyse ; External and internal mass transfer limitation ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
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    Design e ergonomia: aspectos tecnológicos (2021)
    SciELO Books - Editora UNESP
    Details
    Publication Date: 2023-12-21
    Description: Nesta coletânea são apresentadas diferentes questões, métodos de abordagem e demandas para a aplicação da Ergonomia no Design. A evolução tecnológica observada nas últimas décadas proporcionou inúmeros benefícios para o aumento na qualidade de vida das pessoas, mas também resultou em vários problemas de interface tecnológica, os quais geram constrangimentos, acidentes, e frustração aos consumidores. Tais questões são analisadas no livro, no qual se destacam temas de grande atualidade, como por exemplo: o uso de equipamentos médico-hospitalares por indivíduos obesos e de cadeiras de rodas por indivíduos idosos; as avaliações ergonômicas de espaços e equipamentos escolares; as dificuldades de leitura em rótulos e bulas de embalagens; o uso de colete de proteção nas atividades policiais, de calçados femininos com salto alto ou da poltrona do motorista de ônibus urbano, entre outros. Os artigos relatam pesquisas desenvolvidas no Programa de Pós-graduação em Design da UNESP, Campus Bauru, e ressaltam a importância da aplicação da ergonomia no design de produtos e sistemas, com a finalidade de se desenvolver tecnologias para melhorar a qualidade de vida humana.
    Keywords: T1-995 ; TECHNOLOGY & ENGINEERING ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: Portuguese
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    Liquid Crystal on Silicon Devices: Modeling and Advanced Spatial Light Modulation Applications (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: Liquid Crystal on Silicon (LCoS) has become one of the most widespread technologies for spatial light modulation in optics and photonics applications. These reflective microdisplays are composed of a high-performance silicon complementary metal oxide semiconductor (CMOS) backplane, which controls the light-modulating properties of the liquid crystal layer. State-of-the-art LCoS microdisplays may exhibit a very small pixel pitch (below 4 ?m), a very large number of pixels (resolutions larger than 4K), and high fill factors (larger than 90%). They modulate illumination sources covering the UV, visible, and far IR. LCoS are used not only as displays but also as polarization, amplitude, and phase-only spatial light modulators, where they achieve full phase modulation. Due to their excellent modulating properties and high degree of flexibility, they are found in all sorts of spatial light modulation applications, such as in LCOS-based display systems for augmented and virtual reality, true holographic displays, digital holography, diffractive optical elements, superresolution optical systems, beam-steering devices, holographic optical traps, and quantum optical computing. In order to fulfil the requirements in this extensive range of applications, specific models and characterization techniques are proposed. These devices may exhibit a number of degradation effects such as interpixel cross-talk and fringing field, and time flicker, which may also depend on the analog or digital backplane of the corresponding LCoS device. The use of appropriate characterization and compensation techniques is then necessary.
    Keywords: TA1-2040 ; T1-995 ; n/a ; aberration compensation ; holographic and volume memories ; achromatic lens ; head-up displays ; phase characterization ; holographic display ; spatial resolution ; spatial light modulator ; zoom lens ; soliton ; transmission matrix ; head-mounted displays ; diffraction ; parallel-aligned ; liquid-crystal on silicon ; phase measurement ; multimode fiber ; digital holography ; chromatic aberration ; multiorder diffractive lens ; holography ; phase accuracy ; interference ; computer generated hologram ; optical manipulation ; speckle suppression ; phase modulation ; transparent mode ; light scattering ; ferroelectric ; phase change ; liquid-crystal-on-silicon ; imaging systems ; Liquid Crystal on Silicon display ; diffractive optical element ; liquid crystals ; spatially anamorphic phenomenon ; calibration ; head-up display ; helix-free ; phase precision and stability ; kinoform ; spatial light modulators ; photopolymer ; diffractive optics ; mode division multiplexing ; liquid crystal on silicon device ; augmented reality displays ; holographic data storage ; liquid crystal spatial light modulator ; harmonic lens ; fringing field effect ; liquid crystal ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Recent Trends in Phosphate Mining and Beneficiation and Related Waste Management (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: The extraction of apatite minerals is becoming more and more crucial with the depletion of high-grade ores. At the same time, many streams of waste are continuously being produced by the phosphate industry, including calcareous and siliceous waste rocks, clayey sludge and phosphogypsum. These waste products are produced in huge volumes reaching a ratio of between 5 to 10 tons of waste per each ton of concentrated phosphate. The management of these waste products is becoming a real issue in terms of growing public awareness and environmental and financial aspects. In addition, phosphate ores are known to contain other critical raw materials (CRM) such as rare earth elements and uranium. The recovery of these vital elements from phosphate waste may help to develop the needs of the green energy of the future and contribute to the achievement of the sustainable development goals. In this Special Issue, insights related to the following aspects were studied: phosphate extraction and beneficiation, novel phosphate ores, the fine characterization of phosphate ores and waste, phosphoric acid production, critical raw material (CRM) recovery from phosphate ores and waste, reprocessing of phosphate wastes and finally the valorization and reuse of phosphate waste and phosphogypsum.
    Keywords: TA1-2040 ; T1-995 ; TN1-997 ; n/a ; valorization ; ceramic membrane ; general industrial solid waste ; cemented paste backfill ; cemented phosphogypsum backfill ; unconfined compressive strength ; mineralogy ; froth flotation ; silicate-carbonate gangue ; geochemical characteristic ; activity concentration ; building materials ; valuable elements ; upgrading ; radiological influence ; durability ; phosphogypsum ; phosphate ore processing ; low-grade phosphate ; industrial waste ; phosphogypsum (PG) ; filtration ; civil engineering ; comprehensive utilization ; phosphorite ; flotation ; REE recovery ; phosphate mine waste rocks ; Gafsa-Metlaoui Basin ; acid extraction ; rare earth elements ; drying-wetting cycles ; column flotation ; slimes ; collector ; phosphate mine tailings ; apatite ; purification ; REE-bearing phases ; weathered ore ; water washing ; depressant ; environment behavior ; experimental design ; interfering ions ; technological mineralogy ; red mud ; rare earth elements (REEs) ; waste management ; phosphate ore ; waste recycle ; natural radioactivity ; natural aggregates ; phosphate ; beneficiation ; beneficiation tailings ; road techniques wet process ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Electrical-field sensitive YBa?Cu?O??? detectors for real-time monitoring of picosecond THz pulses (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: This work investigates the capability of the high-temperature superconductor YBCO to sense the evolution of the electrical field of THz pulses. A deposition process for ten unit-cell thin films and a sub-µm patterning process were developed to enable high sensitivities. The detector response to THz exctiations and its electrical-field sensitivity were studied. This unique characteristic allows for the investigation of instabilities of the THz radiation emitted from synchrotron storage rings.
    Keywords: T1-995 ; electrical-field sensitivity ; E-Feld Sensitivität ; synchrotron ; terahertz radiation ; YBCO ; Dünnfilmabscheidung ; Synchrotron ; thin film deposition ; Terahertzstrahlung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
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    High accuracy determination of skin friction differences in an air channel flow based on pressure drop measurements (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: The present work delivers a versatile, accurate and reliable wind tunnel facility that is particularly developed to test different flow control techniques for drag reduction in precisely adjustable test conditions. Skin friction changes of 0.4% are resolved, which is comparable to the most accurate reported studies in liquids. this high accuracy is verified through a comprehensive uncertainty analysis. Subsequently, various passive and active flow control strategies are investigated.
    Keywords: T1-995 ; Riblets ; Kanalströmung ; pressure measurement ; riblets ; accuracy ; Messgenauigkeitchannel flow ; drag reduction ; Wandreibung ; Druckmessung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
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    Textile Reinforced Cement Composites: New Insights in Structural and Material Engineering (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: This Special Issue presents the latest advances in the field of Textile-Reinforced Cement Composites, including Textile-Reinforced Concrete (TRC), Textile-Reinforced Mortar (TRM), Fabric-Reinforced Cementitious Matrix (FRCM), etc. These composite materials distinguish themselves from other fibre-reinforced concrete materials by their strain-hardening behaviour under tensile loading. This Special Issue is composed of 14 papers covering new insights in structural and material engineering. The papers include investigations on the level of the fibre reinforcement system as well as on the level of the composites, investigating their impact and fatigue behaviour, durability and fire behaviour. Both the strengthening of existing structures and the development of new structural systems such as lightweight sandwich systems are presented, and analysis and design methods are discussed. This Special Issue demonstrates the broadness and intensity of the ongoing advancements in the field of Textile-Reinforced Cement composites and the importance of several future research directions.
    Keywords: TA1-2040 ; T1-995 ; practical application ; fabric reinforced cementitious mortar ; tensile strength ; carbon concrete composite ; TRC ; cement composites ; model calibration ; micro-fiber ; textile reinforced cementitious composites (TRC) ; alkaline environment ; test setup ; fatigue ; textile-reinforced mortar ; foam concrete (FC) ; FRCM ; fire ; stochastic cracking model ; model ; retrofitting ; toughness ; bending tests ; normal weight/lightweight aggregates ; layered finite elements ; carbon-reinforced concrete ; fiber ; tension ; ACK model ; impact loading ; sandwich elements ; durability ; textile ; creep ; fiber-reinforced concrete ; digital image correlation (DIC) ; moisture ; size effect ; textile reinforcement ; bending ; CRC ; elevated temperatures ; mixture rules ; fibre ; carbon reinforced concrete ; cathodic corrosion protection ; glass fabric ; strengthening ; design provisions ; high performance concrete ; wind loading ; textile reinforced mortar ; masonry ; textile-reinforced concrete ; strain-hardening cement-based composites ; cementitious composites ; design ; carbon textile ; textile reinforced concrete ; textile coating ; thin-walled shells ; reactive powder concrete (RPC) ; shear ; short-fiber reinforcement ; epoxy impregnation ; finite element analysis (FEA) ; bond ; high temperature ; textile reinforced concrete (TRC) ; finite element model ; uniaxial tensile tests ; structural insulating sandwich panel ; shear span ; crack spacing ; hybrid reinforcement ; four-point bending tests ; real scale bending experiments ; single-yarn pullout ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    ECG Based Analysis of the Ventricular Repolarisation in the Human Heart (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: ECG recordings provide diagnostic relevant information on the de- and repolarisation sequences of the heart. A modification of the repolarisation sequence is assumed to cause Torsades de Pointes. Especially drug induced effects on the repolarisation processes are in focus, since some non-cardiac drugs have been associated with sudden cardiac death in the 1990s. The analysis of the ventricular repolarisation using a set of parameters depicting the morphology of the T-wave is introduced in this work. Therefore, new methods of fully automatic patient-specific QRS detection, beat classification and precise T-wave delineation are presented. Using these methods, medical studies are investigated regarding the modification of the T-wave by different compounds. Also the impact of the heart rate on the morphology of the T-wave is part of this research.The reliable identification of ventricular ectopic beats allows an analysis of the influence of these beats on subsequent heart beats. It turned out that the morphology of subsequent heart beats can significantly be changed. This might give new information on the proarrythmical risk of ventricular ectopic beats.
    Keywords: T1-995 ; QT interval ; QT prolongation ; T wave ; Repolarisation ; HRT ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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    Energy Storage and Management for Electric Vehicles (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: This Special Edition of Energies on “Energy Storage and Management for Electric Vehicles” draws together a collection of research papers that critically evaluates key areas of innovation and novelty when designing and managing the high-voltage battery system within an electrified powertrain. The addressed topics include design optimisation, mathematical modelling, control engineering, thermal management, and component sizing.
    Keywords: TA1-2040 ; T1-995 ; battery charging ; lithium ion battery ; adaptive forgetting factor ; operating expenses ; cell sorting ; linear programming ; Simulink ; equivalent circuit model ; genetic algorithm ; multi-parameters sorting ; hybrid power system ; electric vehicle ; energy storage ageing and degradation ; parameter estimation ; Simscape ; supercapacitors ; state-of-health (SOH) ; battery energy storage system ; ECE15 ; efficiency ; residential battery storage ; timetable optimization ; self-discharge ; dynamic programming approach ; state of charge estimation ; regenerative energy ; fuel cell ; energy storage system ; nonlinear battery model ; charging scheme ; Li-Sulfur batteries ; Matlab ; dynamic flow rate optimization ; rule-based optimal strategy ; second-life energy storage applications ; Identification ; hybrid vehicle ; recursive least square ; thermal modelling ; zinc–nickel single-flow battery ; Luenberger observer ; HPPC ; vehicle-to-building ; ?-constraint method ; lithium-ion battery ; life cycle assessment ; parameter identification ; Lipschitz nonlinear system ; lithium titanate oxide batteries ; batteries ; battery degradation ; improved artificial bee colony ; optimal control ; thermal behaviour ; supercapacitor models ; battery cycle-life extension ; cycle-life ; self-organizing maps clustering ; principal component analysis ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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  • 81
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    Ein Vorgehensmodell zur automatischen Kopplung von Services am Beispiel der Integration von Standardsoftwaresystemen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Heutige Architekturen von PLM-Lösungen sind überwiegend Client-Server orientiert. Mittelfristig wird sich hier eine offene, flexible-Architektur wie Service-orientierte Architekturen (SOA) durchsetzen. Dabei werden die PLM-Funktionen als Services zur Ausführung prozessrelevanter Tätigkeiten angeboten. Daraus ergibt sich ein service-basierter Ansatz für das PLM. Die Kombination von PLM und SOA kann so Unternehmen helfen, ihre bestehenden Infrastrukturen im Laufe der Zeit schrittweise aufzubauen.
    Keywords: T1-995 ; Produktdatenmanagement Integration SOA PDM PLM ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Laser Welding (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: Laser welding is a high-energy process used in a wide range of advanced materials to obtain micro- to macro-sized joints in both similar and dissimilar combinations. Moreover, this technique is widely used in several industries, such as automotive, aerospace, and medical industries, as well as in electrical devices. Although laser welding has been used for several decades, significant and exciting innovations often arise from both the process and/or advanced materials side.
    Keywords: TA1-2040 ; T1-995 ; n/a ; tensile strength ; microstructure ; aided electric current ; stainless steel ; accuracy ; porosity control ; laser offset welding ; T-joint ; BTi-6431S ; dissimilar metal ; finite element method ; weld pool behavior ; dissimilar welding ; WPP ; laser welds ; HLAW ; fiber laser ; steel S700MC ; conduction regime ; liquid metal ; buy-to-fly ; EBSD phase mapping ; mass transfer ; mechanical properties ; hardness ; MAG ; phase transformation ; prediction ; LKW ; Ti-5Al-5V-5Mo-3Cr ; laser beam ; laser welding-brazing ; DP1000 steel ; Ti–6Al–4V ; titanium ; low alloyed steel ; H-shaped fusion zone ; pulsed Nd:YAG laser beam welding ; spatter ; high-speed imaging ; weld morphology ; high temperature titanium alloy ; Al/steel joints ; hybrid welding ; dissimilar material ; laser beam welding ; intermetallic layer ; WW ; L-joint ; penetration ; laser stake welding ; laser keyhole welding ; trip steel ; finite element analysis ; laser welding ; magnesium alloy thin sheet ; keyhole ; tensile properties ; dissimilar joining ; IMC layers ; SKM ; fiber laser welding ; aluminium ; dual phase steel ; aluminum alloy T-joint ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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  • 83
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    Magnetisches Nanoaktorsystem (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Ziel dieser Arbeit ist die Entwicklung eines metallischen Nanoaktors, dessen mechanisches Verhalten über magnetische Felder gesteuert werden kann. Mit Hilfe der in der Mikrotechnik etablierten Technologien werden Titan-Nanobiegebalken realisiert, dessen Vorderenden mit einem magnetischen Element funktionalisiert sind. Prozessablauf und Charakterisierungsmethoden werden ausführlich beschrieben und liefern wertvolle Erkenntnisse für den Betrieb solcher Nanoaktoren in zukünftigen Nanosystemen.
    Keywords: T1-995 ; Nanoaktoren ; Magnetpartikel ; Nanostrukturierung. Nanobalken ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 84
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    Planung und Steuerung von Crossdocking-Zentren (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In dieser Arbeit werden zwei Verfahren zur operativen Planung und Steuerung von Crossdocking-Zentren (CDZ) entwickelt und bewertet. Es wird erläutert, wie externe Logistikdienstleister zur Steuerung von CDZ eingesetzt werden können und es werden sowohl ein zentral-hierarchischer als auch ein dezentral-heterarchischer Planungsansatz abgeleitet. Hierdurch lassen sich die Kosten in der Tourenplanung deutlich senken und es wird ein reibungsloser Ablauf der logistischen Prozesse im CDZ ermöglicht.
    Keywords: T1-995 ; Auktionstheorie ; Vickrey-Auktion ; Logistik ; Logistikplanung ; Tourenplanung ; Logistikunternehmen ; Ressourcenal ; Gemischt-ganzzahlige Optimierung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Verfahren zur Entschwefelung von flüssigen handelsüblichen Brennstoffen für die Anwendung in Brennstoffzellensystemen durch partielle Verdampfung und anschließende hydrierende Entschwefelung (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Um Brennstoffzellen mit flüssigen Brennstoffen zu betreiben, müssen diese fast schwefelfrei sein. Die Arbeit stellt ein neuartiges Verfahren zur Entschwefelung vor, bei dem nur der für die Brennstoffzelle bestimmte Teil des Einsatzstroms verdampft und in der Gasphase mit rezykliertem Wasserstoff aus der Brenngaserzeugung entschwefelt wird. Schwerpunkt ist die experimentelle Untersuchung der hydrierenden Entschwefelung von teilverdampftem Kerosin und Heizöl.
    Keywords: T1-995 ; Hydrierende Entschwefelung ; Brennstoffzelle ; Kerosin ; Heizöl ; Teilverdampfung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 86
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    Zum Einfluß stochastischer Anregungen auf mechanische Systeme (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Dynamische Systeme sind durch die Angabe des Zeitverlaufs ihrer Zustandsvariablen vollständig beschreibbar. Diese Form ist jedoch für eine mathematische Bearbeitung ungeeignet. Die Datenmenge reduziert sich um ein vielfaches und eine mathematische Behandlung wird ermöglicht, wenn zur Beschreibung der dynamischen Systeme charakteristische Größen herangezogen werden.In dieser Arbeit werden mit der phänomenologischen Herangehensweise durch eine Untersuchung der Verteilungsdichten die Bifurkationen in stochastischen dynamischen Systemen beschrieben.
    Keywords: T1-995 ; Lineares dynamisches System ; Radsatz ; Fokker-Planck-Gleichung ; Stochastisches dynamisches System ; Nichtlineares dynamisches System ; Querdynamik ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Entropy in Image Analysis (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: Image analysis is a fundamental task for extracting information from images acquired across a range of different devices. Since reliable quantitative results are requested, image analysis requires highly sophisticated numerical and analytical methods—particularly for applications in medicine, security, and remote sensing, where the results of the processing may consist of vitally important data. The contributions to this book provide a good overview of the most important demands and solutions concerning this research area. In particular, the reader will find image analysis applied for feature extraction, encryption and decryption of data, color segmentation, and in the support new technologies. In all the contributions, entropy plays a pivotal role.
    Keywords: TA1-2040 ; T1-995 ; keyframes ; time-delay ; whale optimization algorithm ; multilevel thresholding ; multi-exposure image fusion ; additive manufacturing ; patch structure decomposition ; ultra-sound images ; 3D scanning ; Arimoto entropy ; contrast enhancement ; spatial filling factor ; depth maps ; image processing ; 3D prints ; differential evolution ; field of experts ; normalized divergence measure ; image privacy ; multiscale top-hat transform ; q-exponential ; texture information entropy ; diffusion ; hybrid algorithm ; Weibull statistics ; adaptive selection ; nonextensive entropy ; computer aided diagnostics ; fatty liver ; random forest ; DNA encoding ; low contrast ; entropy ; Minkowski island ; fuzzy entropy ; free-form deformations ; person re-identification ; chaotic system ; DNA computing ; pavement ; information entropy ; discrete entropy ; Tsallis statistics ; video skimming ; prime-indexed primes ; natural scene statistics (NSS) ; Hénon map ; q-sigmoid ; image entropy ; Shannon entropy ; macrotexture ; Shannon’s entropy ; binary image ; multi-feature fusion ; image analysis ; uncertainty assessment ; non-rigid registration ; hash layer ; Cantor set ; dynamic filtering ; deep neural network ; security analysis ; multiple-image encryption ; Hamming distance ; blind image quality assessment (BIQA) ; q-Gaussian ; remote sensing ; decay trend ; chaotic cryptography ; chaotic strategy ; cross-entropy loss ; random insertion ; metabolic syndrome ; sign languages ; generalized entropies ; relevance feedback ; image retrieval ; two-dimensional chaotic economic map ; cryptanalysis ; infrared images ; 3D Latin cube ; SHA-256 hash value ; gradient distributions ; structural entropy ; discrete cosine transform (DCT) ; chaotic map ; hepatic steatosis ; machine vision ; electromagnetic field optimization ; security ; image segmentation ; quantization loss ; colonoscopy ; video summarization ; permutation ; Kapur’s entropy ; surface quality assessment ; permutation-diffusion ; Ramanujan primes ; Rényi entropies ; chosen-plaintext attack ; image encryption ; dynamic index ; color image segmentation ; ultrasound ; Otsu method ; sigmoid ; reconstruction ; image information entropy ; 3-D digital imaging ; positron emission tomography ; medical imaging ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
    Language: English
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    Feldtheoretische Modellierung der Materialprozessierung mit Mikrowellen im Durchlaufbetrieb (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Mikrowellen bewirken direkt im Inneren des zu prozessierenden Materials eine schnelle und energiesparende Heizung. In Kombination mit dem Durchlaufbetrieb wird eine besonders gleichmäßige Prozessierung sowie eine verbesserte Integration in den Produktionsprozeß erreicht. Es wird beschrieben, wie sich solche Applikatoren in konsistenter Weise modellieren lassen. Dies umfaßt die gekoppelte elektromagnetische und thermische Feldberechnung unter Berücksichtigung eines simultanen Materialvorschubs.
    Keywords: T1-995 ; Mikrowellenprozessierung Materialprozessierung Durchlaufbetrieb Modellierung Feldtheorie ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Development of an Electrochemical Biosensor Platform and a Suitable Low-Impedance Surface Modification Strategy (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In this work, a flexible biosensor platform based on impedance spectroscopy and comprising of gold electrodes, polymeric flow cells and a suitable surface modification were developed. Initially, several surface modification techniques described in literature were implemented and optimized for impedimetric biosensors but their individual limitations rendered them unsuitable for this biosensor platform. A novel method based on photobleaching was developed and tested showing satisfactory results.
    Keywords: T1-995 ; Mikrofluidik ; electrochemical impedance spectroscopy ; Oberflächenmodifikation ; Biosensor ; surface modification ; photobleaching ; PhotobleichungBiosensor ; microfluidics ; Elektrochemische Impedanzspektroscopie ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
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  • 90
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    Grain-size effects in nanoscaled electrolyte and cathode thin films for solid oxide fuel cells (SOFC) (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Due to their high energy conversion efficiencies and low emissions, Solid Oxide Fuel Cells (SOFCs) show promise as a replacement for combustion-based electrical generators at all sizes. Further increase of SOFC efficiency can be achieved by microstructural optimization of the oxygen-ion conducting electrolyte and the mixed ionic-electronic conducting cathode. By application of nanoscaled thin films, the exceptionally high efficiency allows the realization of mobile SOFCs.
    Keywords: T1-995 ; grain-size effect ; nanoscaled thin film ; solid oxide fuel cell (SOFC) ; cathode ; electrolyte ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
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  • 91
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    Verbrennungskontrollierte Erwärmung des Brennraums zur Emissionsreduktion während des Kaltstarts - Untersuchungen zu Emissionen und zur Flammenausbreitung (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: This work describes the influence of catalytic converter heating strategies on the emissions during heating operation, as well as during the subsequent load demand at different engine start temperatures. A novel strategy is presented, that provides heating of the combustion chamber, without decreasing the catalyst converter heating significantly. The studies were carried out on a gasoline engine. Emissions were examined in detail. In addition, the flame propagation is evaluated experimentally.
    Keywords: T1-995 ; Katalysatorheizen ; cold start ; combustion process ; Flammenausbreitung ; particulate emission ; Partikelemissionen ; Brennverfahren ; Kaltstart ; flame Development ; catalytic converter heating ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 92
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    Advances in Wood Composites (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-11
    Description: Wood composites have shown very good performance, and substantial service lives when correctly specified for the exposure risks present. Selection of an appropriate product for the job should be accompanied by decisions about the appropriate protection, whether this is by design, by preservative treatment or by wood modification techniques. This Special Issue, Advances in Wood Composites presents recent progress in enhancing and refining the performance and properties of wood composites by chemical and thermal modification and the application of smart nanomaterials, which have made them a particular area of interest for researchers. In addition, it reviews some important aspects in the field of wood composites, with particular focus on their materials, applications, and engineering and scientific advances, including solutions inspired biomimetrically by the structure of wood and wood composites. This Special Issue, with a collection of 13 original contributions, provides selected examples of recent Advances in Wood Composites
    Keywords: TA1-2040 ; T1-995 ; shear strength ; n/a ; buckling ; thermal property ; acetic anhydride ; WPC ; silicon carbide ; coating amount ; composite ; polymer-triticale boards ; wood ; activation volume ; oriented strand lumber (OSL) ; bending strength ; nanowollastonite ; VOCs ; wood-inorganic composites ; thermal modification ; wood plastic composite ; crystallinity ; sol-gel process ; wood adhesive ; straw ; mechanical properties ; bamboo ; plastic ; carbothermal reduction ; formaldehyde emissions ; cellulose ; graphene nano-platelets ; creep behavior ; surface properties ; dimensional stability ; nanocompounds ; UF resin ; tunnel-structured ; ceramic ; color ; water absorption ; high-density polyethylene film ; mechanical property ; aquacultural ; HDPE ; biorefinery lignin ; methyl methacrylate ; structural analysis ; sol–gel process ; polyurethane-acrylate ; mechanical and physical properties ; water-based UV curing coating ; oak (Quercus alba L.) ; dynamic thermodynamic ; stepped isostress method ; thermoplastic polymers ; sustainable adhesives ; finite element analysis ; rapid formaldehyde release ; adhesive penetration ; modulus of elasticity in bending ; Southwell’s method ; hydrophobicity ; Abaqus ; sepiolite ; chemical structure ; alder plywood ; wood panels ; particleboard properties ; chemical modification ; thickness swelling ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
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    Neuartige Drehgelenke für reibungsarme Mechanismen : Auslegungskriterien und Berechnungsmethoden (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In many branches of technology is a need for mechanisms with minimum friction and minimum bearing play. Such mechanisms are neither feasible with conventional hinges nor with hinges from the micro- and nanopositioning. This thesis proposes novel hinges in order to bridge the gap between the precision of micropositioning and the workspace of applications in manufacturing. The proposed implementations are flexure hinges for large displacements and dry slide bearings with friction reduction.
    Keywords: T1-995 ; Festkörpergelenke ; Reibwertglättung ; Drehgelenke ; Trockengleitlager ; Elastica ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Chemie für den Maschinenbau. Bd. 2: Organische Chemie für Kraft- und Schmierstoffe, Polymerchemie für Polymerwerkstoffe (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Dieses Buch beinhaltet zunächst eine kurze Einführung in die Organische Chemie. Organische Grundkenntnisse sind die Voraussetzung, um nicht nur Kraftstoffe und Schmierstoffe zu verstehen, sondern im Besonderen die Polymerchemie für Polymerwerkstoffe.Die Vorlesung ""Polymerwerkstoffe"" wird im Maschinenbaustudium in einem höheren Semester angeboten.Allgemeine chemische Grundkenntnisse für Chemie im Nebenfach findet man im Buch 1 ""Chemie für Maschinenbau - Anorganische Chemie für Werkstoffe und Verfahren"".
    Keywords: T1-995 ; Organische Chemie ; Polymerchemie ; Polymerwerkstoffe ; Schmierstoffe ; Kraftstoffe ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Supraleitende koplanare Mikrowellenfilter für radioastronomische Empfänger bei 15 K (2021)
    KIT Scientific Publishing
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    Publication Date: 2023-12-21
    Description: In dieser Arbeit wird die anwendungsorientierte Entwicklung von Empfangsfiltern für das Radioteleskop des Max Planck Institutes für Radioastronomie (MPIfR) in Effelsberg vorge-stellt. Dort bestand großes Interesse an Bandpassfiltern für das 21 cm bzw. 11 cm Band, die bei radioastronomischen Polarisationsmessungen zum Einsatz kommen sollen. Für beide Bänder sind jeweils zwei zirkularpolarisierte Empfangskanäle auf ein Polarimeter geschaltet, das eine Empfängerrauschtemperatur von ca. 5 K besitzt. Die schmalbandigen Vorfilter für jeden einzelnen Kanal sollen daher im Durchlassbereich eine extrem kleine Dämpfung und möglichst identische Übertragungscharakteristiken (Streuparameter) bei einer Betriebstemperatur von 15 K aufweisen. Dabei soll dieses Ergebnis ohne jegliche nachträgliche mechanische Abstimmung, wie z. B. durch die Verwendung keramischer Schrauben, erreicht werden. Für die spätere Endmontage auf einem Kaltfinger im Hochvakuum, wird zudem ein möglichst hoher Grad an Miniaturisierung der einzelnen Bandpässe angestrebt, um die Packungsdichte des Komplettsystems zu erhöhen. Neben der notwendigen Filtersynthese, um die geforderten Übertragungscharakteristiken zu erreichen, werden die benötigten Materialien mit ihren Eigenschaften beschrieben, mittels derer die elektrischen Anforderungen der konzipierten Netzwerke erfüllt werden können. Darüber hinaus werden die Bauelemente, um das Ziel einer hohen Integration der einzelnen Bandpässe zu erreichen, und die Entwicklung sowie Auslegung koplanarer Leitungsresonatoren in Mäanderform für den modularen Aufbau der Bandpässe vorgestellt. Mit den gewonnenen Resultaten aus Simulationen und insbesondere Mes-sungen an realisierten Filterexemplaren schließt diese Arbeit.
    Keywords: T1-995 ; Mikrowellenfilter ; Kryoelektronik ; Radioastronomie ; Koplanarleitung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 96
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    Hybride Dünnschichtphotovoltaik auf der Basis von Cu(In,Ga)Se2 und organischen Halbleitern (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In dieser Arbeit wurden hybride Bauelementarchitekturen für effiziente Dünnschichtsolarzellen konzipiert, experimentell realisiert und charakterisiert. Neben hybriden Konzepten für flüssig prozessierbare Elektrodensysteme wurden vor allem Ansätze verfolgt, hocheffiziente Kupfer-Indium-Gallium-Diselenid-Absorber mit perspektivisch druckbaren organischen Halbleitern sowohl in Einzel- als auch in Tandem-Solarzellen zu kombinieren.
    Keywords: T1-995 ; Organische Halbleiter ; Polymersolarzellen ; Nanotechnologie ; Photovoltaik ; CIGS ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Hybride Funkkanalmodellierung für ultrabreitbandige MIMO-Systeme (2021)
    KIT Scientific Publishing
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    Publication Date: 2023-12-21
    Description: In diesem Buch werden die Eigenschaften des ultrabreitbandigen und richtungsaufgelößten Funkkanals umfassend analysiert. Auf Basis von strahlenoptischen Verfahren werden zwei hybride Modellierungsansätze vorgeschlagen, welche die Streuprozesse im Funkkanal nachbilden. Die Modelle werden mit Messungen verifiziert und in Systemsimulationen eines MIMO-UWB Kommunikationssystems eingesetzt. Anhand dieser Simulationen wird der Leitfaden zum Design von Antennenarrays für solche Systeme abgeleitet.
    Keywords: T1-995 ; Kanalmodellierung ; UWB ; Mehrantennensysteme ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 98
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    Micro/Nano-Chip Electrokinetics (2021)
    MDPI - Multidisciplinary Digital Publishing Institute
    Details
    Publication Date: 2024-04-09
    Description: Micro/nanofluidic chips have found increasing applications in the analysis of chemical and biological samples over the past two decades. Electrokinetics has become the method of choice in these micro/nano-chips for transporting, manipulating and sensing ions, (bio)molecules, fluids and (bio)particles, etc., due to the high maneuverability, scalability, sensitivity, and integrability. The involved phenomena, which cover electroosmosis, electrophoresis, dielectrophoresis, electrohydrodynamics, electrothermal flow, diffusioosmosis, diffusiophoresis, streaming potential, current, etc., arise from either the inherent or the induced surface charge on the solid-liquid interface under DC and/or AC electric fields. To review the state-of-the-art of micro/nanochip electrokinetics, we welcome, in this Special Issue of Micromachines, all original research or review articles on the fundamentals and applications of the variety of electrokinetic phenomena in both microfluidic and nanofluidic devices.
    Keywords: T1-995 ; micro/nanofluidics ; streaming potential/current ; electrical sensing ; electrokinetics ; diffusioosmosis ; dielectrophoresis ; electroosmosis ; electrophoresis ; diffusiophoresis ; induced charge electrokinetics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
    Format: application/octet-stream
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  • 99
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    Numerische Berechnung der Tragfähigkeit und der Steifigkeit von querzugverstärkten Verbindungen mit stiftförmigen Verbindungsmitteln (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Holz im Verbindungsbereich neigt zum Spalten, wenn Verbindungen mit mehreren Verbindungsmitteln sowie mit geringen Abständen der Verbindungsmittel untereinander ausgeführt werden. Spalten des Holzes kann jedoch verhindert werden, wenn das Holz im Verbindungsbereich mit selbstbohrenden Holzschrauben verstärkt wird. Diese Arbeit stellt verschiedene Methoden dar, wie das Tragverhalten spaltgefährdeter und verstärkter Verbindungen mit Hilfe der Finite-Elemente-Methode erfasst werden kann.
    Keywords: T1-995 ; Verstärkungen ; Holzbau ; Verbindungen ; selbstbohrende Holzschrauben ; Ingenieurholzbau ; FEM im Holzbau ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Design and Experimental Investigation of a Second Harmonic 20 kW Class 28 GHz Gyrotron for Evaluation of New Emitter Technologies (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Gyrotrons are high-power mm-wave tubes. Here, the design, construction and experimental investigation of a 20 kW, 28 GHz gyrotron (2nd harmonic) are reported. This tube was designed to evaluate new emitters for future highly efficient and reliable fusion gyrotrons and for material processing applications. Following experimental results have been achieved in CW operation: 22.5 kW output power at 23.4 kV electron beam voltage and 2.23 A beam current with the world record efficiency of 43 %.
    Keywords: T1-995 ; Microwave-Materials-Processing ; Wirkungsgrad ; Efficiency ; Kernfusion ; Emitter-Technologien ; Nuclear-Fusion ; Emitter-Technologies ; Gyrotron ; MikrowellenmaterialprozesstechnikGyrotron ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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