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Der Einfluss der Fahrbahnoberflächenkrümmung auf den Rollwiderstand, die Cornering Stiffness und die Aligning Stiffness von Pkw-Reifen

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Book Series: Karlsruher Schriftenreihe Fahrzeugsystemtechnik / Institut für Fahrzeugsystemtechnik ISSN: 18696058 ISBN: 9783866449831 Year: Volume: 16 Pages: 262 p. DOI: 10.5445/KSP/1000032808 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:01:58
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In der Industrie und in den Forschungsinstitutionen werden die unterschiedlichsten Prüfstandskonzepte eingesetzt, um die Reifeneigenschaften messtechnisch zu erfassen. Ziel der vorliegenden Forschungsarbeit war es, den Einfluss der Fahrbahnoberflächenkrümmung auf Rollwiderstandsmessergebnisse sowie auf die Ergebnisse von Cornering-Stiffness- und Aligning-Stiffness-Messungen genau zu erfassen und die Wirkung unterschiedlicher Versuchsparameter auf den Fahrbahnkrümmungseinfluss aufzuzeigen.

Application of the cohesive zone model to the analysis of rotors with a transverse crack

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Book Series: Schriftenreihe des Instituts für Technische Mechanik, Karlsruher Institut für Technologie ISSN: 16143914 ISBN: 9783866447912 Year: Volume: 16 Pages: XVII, 183 p. DOI: 10.5445/KSP/1000025401 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:02:00
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Ein Riss im Rotor ruft eine lokale Steifigkeitsänderung hervor. Die vorliegende Arbeit ermittelt die Steifigkeitsänderung einer angerissenen Welle. Dazu wird ein Kohäsivzonenmodell eingesetzt. Das Modell wurde für die erste Rissöffnungsmode bei ebenem Verzerrungszustand in Abhängigkeit der Mehrachsigkeit des Spannungszustandes (Triaxialität) entwickelt. Außerdemwird das Kohäsivzonenmodell bei einem eindimensionalen Kontinuumsrotor als FE Modell ausgeführt.

Neuronal Mechanics and Transport

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Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889198238 Year: Pages: 212 DOI: 10.3389/978-2-88919-823-8 Language: English
Publisher: Frontiers Media SA
Subject: Neurology --- Science (General)
Added to DOAB on : 2016-01-19 14:05:46
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Understanding the underlying mechanisms of how axons and dendrites develop is a fundamental problem in neuroscience and a main goal of research on nervous system development and regeneration. Previous studies have provided a tremendous amount of information on signaling and cytoskeletal proteins regulating axonal and dendritic growth and guidance. However, relatively little is known about the relative contribution and role of cytoskeletal dynamics, transport of organelles and cytoskeletal components, and force generation to axonal elongation. Advancing the knowledge of these biomechanical processes is critical to better understand the development of the nervous system, the pathological progression of neurodegenerative diseases, acute traumatic injury, and for designing novel approaches to promote neuronal regeneration following disease, stroke, or trauma. Mechanical properties and forces shape the development of the nervous system from the cellular up to the organ level. Recent advances in quantitative live cell imaging, biophysical, and nanotechnological methods such as traction force microscopy, optical tweezers, and atomic force microscopy have enabled researchers to gain better insights into how cytoskeletal dynamics and motor-driven transport, membrane-dynamics, adhesion, and substrate rigidity influence axonal elongation. Given the complexity and mechanical nature of this problem, mathematical modeling contributes significantly to our understanding of neuronal mechanics. Nonetheless, there has been limited direct interaction and discussions between experimentalists and theoreticians in this research area. The purpose of this Frontiers Research Topic is to highlight exciting and important work that is currently developing in the fields of neuronal cell biology, neuronal mechanics, intracellular transport, and mathematical modeling in the form of primary research articles, reviews, perspectives, and commentaries.

Liver Myofibroblasts

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Book Series: Frontiers Research Topics ISSN: 16648714 ISBN: 9782889199891 Year: Pages: 99 DOI: 10.3389/978-2-88919-989-1 Language: English
Publisher: Frontiers Media SA
Subject: Science (General) --- Physiology
Added to DOAB on : 2016-01-19 14:05:46
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Myofibroblasts (MFB) are found in most tissues of the body. They have the matrix-producing functions of fibroblasts and contractile properties that are known from smooth muscle cells. Fundamental work of the last decades has shed remarkable light on their origin, biological functions and role in disease. During hepatic injury, they fulfill manifold functions in connective tissue remodeling and wound healing, but overshooting activity of MFB on the other side induces fibrosis and cirrhosis. The present e-book "Liver myofibroblasts" contains 9 articles providing comprehensive information on "hot topics" of MFB. In our opening editorial we provide a short overview of the origin of MFB and their relevance in extracellular matrix formation which is the hallmark of hepatic fibrosis. Thereafter, leading experts in the field share their current perspectives on special topics of (i) MFB in development and disease, ii) their role in hepatic fibrogenesis, and (iii) promising therapies and targets that are suitable to interfere with hepatic fibrosis.

Analyse der mechanischen Randbedingungen zur Adaption der oszillierenden Hinterschneidtechnik an einen Mobilbagger

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Book Series: Karlsruher Schriftenreihe Fahrzeugsystemtechnik / Institut für Fahrzeugsystemtechnik ISSN: 18696058 ISBN: 9783731501930 Year: Volume: 24 Pages: 159 p. DOI: 10.5445/KSP/1000039462 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:01:58
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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.

Steifigkeit axial beanspruchter Vollgewindeschrauben

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Book Series: Karlsruher Berichte zum Ingenieurholzbau / Karlsruher Institut für Technologie, Holzbau und Baukonstruktionen ISSN: 1860093X ISBN: 9783731508267 Year: Volume: 34 Pages: 174 p. DOI: 10.5445/KSP/1000085040 Language: GERMAN
Publisher: KIT Scientific Publishing
Subject: General and Civil Engineering
Added to DOAB on : 2019-07-28 18:37:01
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The load-bearing capacity of axially loaded fully threaded screws can be determined correctly according to the acknowledged rules of technology. Whereas the currently available calculation models for the axial stiffness are clearly different from one another. In this research, different test methods for the determination of the axial stiffness were tested and analysed. Based on the test results, a test method was finally identified and calculation models were developed.

Ultrasound Elastography

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ISBN: 9783038979104 / 9783038979111 Year: Pages: 144 DOI: 10.3390/books978-3-03897-911-1 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Medicine (General) --- Therapeutics
Added to DOAB on : 2019-08-28 11:21:27
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The comparison between methods, evaluation of portal hypertension and many other questions are still open issues in liver elastography. New elastographic applications are under evaluation and close to being used in clinical practice. Strain imaging has been incorporated into many disciplines and EFSUMB guidelines are under preparation. More research is necessary for improved evidence for clinical applications in daily practice. The Special Issue published papers on recent advances in development and application of Ultrasound Elastography.

Mechanism Design for Robotics

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ISBN: 9783039210589 / 9783039210596 Year: Pages: 212 DOI: 10.3390/books978-3-03921-059-6 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-06-26 08:44:06
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MEDER 2018, the IFToMM International Symposium on Mechanism Design for Robotics, was the fourth event in a series that was started in 2010 as a specific conference activity on mechanisms for robots. The aim of the MEDER Symposium is to bring researchers, industry professionals, and students together from a broad range of disciplines dealing with mechanisms for robots, in an intimate, collegial, and stimulating environment. In the 2018 MEDER event, we received significant attention regarding this initiative, as can be seen by the fact that the Proceedings contain contributions by authors from all around the world.The Proceedings of the MEDER 2018 Symposium have been published within the Springer book series on MMS, and the book contains 52 papers that have been selected after review for oral presentation. These papers cover several aspects of the wide field of robotics dealing with mechanism aspects in theory, design, numerical evaluations, and applications.This Special Issue of Robotics (https://www.mdpi.com/journal/robotics/special_issues/MDR) has been obtained as a result of a second review process and selection, but all the papers that have been accepted for MEDER 2018 are of very good quality with interesting contents that are suitable for journal publication, and the selection process has been difficult.

Keywords

hexapod walking robot --- 3-UPU parallel mechanism --- kinematics --- stability --- gait planning --- shape changing --- rolling --- robot --- cylindrical --- elliptical --- velocity control --- economic locomotion --- actuation burden --- inadvertent braking --- humanoid robots --- parallel mechanisms --- cable-driven robots --- robotic legs --- painting robot --- collaborative robot --- image processing --- non-photorealistic rendering --- artistic rendering --- robot wrists --- spherical parallel mechanism --- orientational mechanisms --- computer-aided design --- workspace analysis --- iCub --- shape memory alloy --- compliant mechanism --- SMA actuator --- pneumatic artificial muscle --- McKibben muscle --- haptic glove --- hand exoskeleton --- teleoperation --- force reflection --- human-machine interaction --- robot kinematics --- robot singularity --- singularity analysis --- robot control --- mobile manipulation --- human-robot-interaction --- learning by demonstration --- compliance control --- trajectory planning --- energy efficiency --- redundancy --- robotic cell --- kinematic redundancy --- cable-driven parallel robots --- fail-safe operation --- exercising device --- cobot --- V2SOM --- safety mechanism --- safe physical human–robot interaction --- pHRI --- variable stiffness actuator --- VSA --- collaborative robots --- humanoid robotic hands --- underactuated fingers --- graphical user interface --- grasp stability --- safe physical human–robot interaction (pHRI) --- variable stiffness actuator (VSA) --- collaborative robots --- robot-assisted Doppler sonography --- n/a

Geomechanics for Energy and a Sustainable Environment

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ISBN: 9783039281503 / 9783039281510 Year: Pages: 102 DOI: 10.3390/books978-3-03928-151-0 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: General and Civil Engineering --- Technology (General)
Added to DOAB on : 2020-01-30 16:39:46
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This book describes recent advances in geomechanics for energy and the sustainable environment. Four research articles, related to high-level radioactive nuclear waste disposal stability, geological effect and wellbore stability considerations for methane gas hydrate production, and artificial soil freezing, are presented in this book. In addition, a comprehensive state-of-the-art review verifies the strong correlation between global climate change and the occurrence of geotechnical engineering hazards. The review also summarizes recent attempts to reduce CO2 emissions from civil and geotechnical engineering practices. Readers will gain ideas as to how we can deal with conventional and renewable energy sources and environment-related geotechnical engineering issues.

Smart Sensors for Structural Health Monitoring

Authors: --- ---
ISBN: 9783039217588 / 9783039217595 Year: Pages: 342 DOI: 10.3390/books978-3-03921-759-5 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering
Added to DOAB on : 2019-12-09 11:49:16
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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

optical crack growth sensor --- digital sampling moiré --- 2D crack growth --- calibration --- concrete crack --- feature extraction --- mapping construction --- fuzzy classification --- rotary ultrasonic array --- bending stiffness --- damage identification --- environmental noise --- bridge --- test vehicle --- structural impact monitoring --- sensors distribution optimization --- NSGA-II --- energy analysis of wavelet band --- principal component analysis --- transmission tower --- settlement --- wind force --- acceleration --- modal frequencies --- sudden event monitoring --- wireless smart sensors --- demand-based nodes --- event-triggered sensing --- data fusion --- patch antenna --- sensor --- structural health monitoring --- crack identification --- resonant frequency --- damage identification --- sensor optimization --- Virtual Distortion Method (VDM) --- Particle Swarm Optimization (PSO) algorithm --- sensitivity --- structural health monitoring --- piezoelectric wafer active sensors --- active sensing --- passive sensing --- damage detection --- acoustic emission --- uniaxial stress measurement --- structural steel members --- amplitude spectrum --- phase spectrum --- shear-wave birefringence --- acoustoelastic effect --- damage detection --- smartphones --- steel frame --- shaking table tests --- wavelet packet decomposition --- low-velocity impacts --- strain wave --- impactor stiffness --- data processing --- feature selection --- impact identification --- crack --- strain --- distributed dense sensor network --- structural health monitoring --- fibre bundle --- reflective optical sensor --- tip clearance --- turbine --- aero engine --- principal component analysis --- space window --- time window --- damage detection --- length effect --- stress detection --- electromagnetic oscillation --- steel strand --- concrete structures --- SHM --- stretching method --- model updating --- displacement sensor --- helical antenna --- resonant frequency --- perturbation theory --- normal mode --- wheel minor defect --- high-speed train --- online wayside detection --- Bayesian blind source separation --- FBG sensor array

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