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    Parametric Analysis of Static–Dynamic Characteristics of Adjacent Tunnels in Super-Large Twin Tunnels by DEM by Lin Wu, Zhuoyuan Cao, Xiaoya Bian, Jiayan Wang, Hong Guo

    Published 2025-06-01
    “…The dynamic characteristics of super-large-diameter twin tunnels under train vibration loads have become a critical issue affecting not only the engineering safety of their own tunnels but also adjacent tunnels. …”
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    Launch Experiment of Microwave Rocket Equipped with Six-Staged Reed Valve Air-Breathing System by Kosuke Irie, Ayuto Manabe, Tomonori Nakatani, Tatsuki Kinoshita, Toshinobu Nomura, Matthias Weiand, Kimiya Komurasaki, Takahiro Shinya, Ryosuke Ikeda, Keito Ishita, Taku Nakai, Ken Kajiwara, Yasuhisa Oda

    Published 2025-06-01
    “…However, insufficient air intake during repetitive PDE cycles has limited achievable thrust performance. To address this issue, a model equipped with a six-stage reed valve system (36 valves in total) was developed to ensure sufficient air intake, which measured 500 mm in length, 28 mm in radius, and 539 g in weight. …”
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    SAFETY AS AN ELEMENT OF CREATING COMPETITIVE ADVANTAGE AMONG AIRLINES GIVEN THE EXAMPLE OF THE AIRBUS A350 XWB AND THE BOEING 787 DREAMLINER AIRCRAFT by Marcin RUTKOWSKI

    Published 2020-09-01
    “…An important element, a condition that may determine the achievement of competitive advantage, is the issue of safety, which also applies to the operation of aircraft. …”
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