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Ondřej Lufinka,Jan Kadeřábek,Juraj Prstek,Jiří Skála,Kamil Kosturik 한국자동차공학회 2022 International journal of automotive technology Vol.23 No.5
This paper deals with the movement, localization and navigation possibilities of Autonomous Robotic Platform (ARP). Such a platform is used for ADAS (Advanced Driver Assistance Systems) testing in automotive. At the beginning, the paper discusses different solutions that are already available worldwide and it outlines ideas for improving the process of this ADAS testing. In the next chapters, ARP that is used as a prototype to test these ideas is introduced mainly from the embedded electronics point of view, since it is the core of this research. The mechanical design of the prototype is explained in a different paper, which is cited in the references section. Then the paper focuses on the key aspects of this research; that is the possibility to achieve an omnidirectional movement to make the testing more variable and to explore different solutions for the localization and navigation of these platforms. Various sensors are compared with the reference position and the results are discussed in the last chapter and in the conclusion. Also, the possibility of multiple platforms synchronisation is proposed.
Simulating dynamics, durability and noise emission of wind turbines in a single CAE environment
Guillaume Lethé,J. De Cuyper,J. Kang,Matthew Furman,Dick Kading 대한기계학회 2009 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.23 No.4
To optimize the design of their windturbines, manufacturers make use of simulation tools to predict the loads that the different components need to transmit along the drivetrain from the blades to the generator. Using detailed 3D Multibody simulation allows for in-depth studies, capturing the dynamic behavior of the overall system. Multi-body simulation is used to assess the structural reliability of components such as the gearbox and to make sure they resist the extreme and unpredictable loads from the wind for a reasonable lifetime. LMS Virtual.Lab provides state-of-the art methods to model gearboxes and the meshing of gears with varying stiffness. It also provides capabilities to model the rotorblade as well as the generator. The complete system is built from the subsystems assembled in a versatile and modular way. Using LMS Virtual.Lab Motion, a dynamic simulation is finally performed to visualize the behavior of the system trough graphs and animations. The integrated simulation capabilities within LMS Virtual.Lab environment also offer an efficient solution to analyze and optimize the durability performance, noise emissions and overall yield of wind turbines. Accurate loads are easily generated with LMS Virtual.Lab Motion thanks to state-of-the-art contact formulations suited for system level analysis. Those loads lead the engineers to evaluate the stresses occurring in each component and the vibrations generated in the structure. The environment enables to quickly analyze the effect of design changes on a specific performance attribute, which allows engineering teams to perform fast optimization loops from the early development stages onwards.
Olusola Olalekan Elekofehinti,Jean Paul Kamdem,Daiane Francine Meinerz,Ige Joseph Kade,Isaac Gbadura Adanlawo,Joa˜o Batista Teixeira Rocha 대한약학회 2021 Archives of Pharmacal Research Vol.44 No.9
Solanum anguivi fruit saponin has antidiabeticproperty via interference with cellular energy metabolismand inhibition of reactive oxygen species (ROS) generation. In the current study, brain specific in vitro anti-oxidantrole of S. anguivi saponin was investigated in the P2synaptosomal fraction of rat brain. Using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide reductionassay, S. anguivi saponin concentration- dependently(10–200 lg/ml) reversed Fe2? and sodium nitroprussideinduceddecrease in mitochondrial activity via inhibition ofROS production, ROS-induced oxidation of protein andnon-protein thiol-containing molecules and lipid peroxidationas measured by thiobarbituric acid reactive substanceslevels. Conclusively, S. anguivi fruit saponin represents a class of natural compounds with the ability toreverse synaptosomal disruption, loss of mitochondrialintegrity and function often associated with the progressionof Huntington’s disease, Alzheimer disease, Parkinsondisease and amyotrophic lateral sclerosis diseases.