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This would result in a much colder climate for the UK while accelerating warmth in the tropics. Some scientists predict this could happen next century. James Gray, Chair of the polar research sub-committee, said: "For too long the effects of a changing Arctic have been out of sight, out of mind. Before melting glaciers and ice sheets contribute to widespread flooding and irreversible weather patterns in the UK, we must throw our full toolbox at understanding changes in the Arctic better." Hey JV (2014) Design, implementation, and characterization of a novel lidar ceilometer. Springer Cham, London. https://doi.org/10.1007/978-3-319-12613-5 The mirror was verified by means of the interferometric measurement. Two testing configurations were considered: free and screwed. In the former the mirror was simply placed on the support. In the latter, the mirror was fixtured by tightening the screws used for the final assembly with the nominal torque of 1.6 Nm required by the application.
Milan B (2016) Laser additive manufacturing. Materials, Design, Technologies, and Applications. Woodhead Publishing, Cambridge This peculiarity allows the use of precursor materials with a preferred size and shape for a good powder flow. RAM technology utilizes exothermic chemical reactions to synthesize product materials during the additive process to improve printability and properties. The RAM process enables formation of advanced MMCs that combine a metal matrix and high strength reinforcing ceramic or intermetallic phases [ 23]. The tensile test confirmed the expected mechanical properties of the SLMed MMC, namely a ultimate strength of more than 500 MPa and a Young Modulus of 96 GPa;Due to climate warming, irreversibly thawing permafrost is releasing organic matter frozen for up to a million years, most of which decomposes into carbon dioxide and methane, further enhancing the greenhouse effect. Sahu R, Patel V, Singh S, Munjal B (2017) Structural optimization of a space mirror to selectively constrain optical aberrations. Struct Multidiscip Optim 55(6):2353–2363. https://doi.org/10.1007/s00158-016-1616-x
A static balancing of this lightened mirror was provided. In particular, the original mass of 205 g was reduced to 154 g. Therefore, the mirror total mass was cut by 25% (from 415 to 311.8 g).The dynamic analysis showed smaller displacements than the case the mirror is assembled via tightening the screws; A tweet with almost 7,000 likes said: "How is a zombie virus get buried in a frozen lake? And why did they dig it up? That doesn't even make sense". Xu C, Peng X, Liu J et al (2022) (2022) A high efficiency and precision smoothing polishing method for NiP coating of metal mirror. Micromachines 13:1171. https://doi.org/10.3390/mi13081171
Our speculum metal mirror is about the same size as that for the reflecting telescope with which William Herschel discovered the planet Uranus in 1781 – the first planet to be discovered with a telescope. We have a similar reflecting telescope made by Herschel on display in the Science City gallery, as well as the mirror which we had specially made. Qi D, Yu H, Liu M et al (2019) Mechanical behaviors of SLM additive manufactured octet-truss and truncated-octahedron lattice structures with uniform and taper beams. Int J Mech Sci 163:105091. https://doi.org/10.1016/j.ijmecsci.2019.105091Fan Y, Dong D, Li C et al (2021) Research and experimental verification on topology-optimization design method of space mirror based on additive-manufacturing technology. MDPI Machines 9(12):354. https://doi.org/10.3390/machines9120354 This measurement principle is usually referred to as time of flight (ToF). ToF can be obtained by sending through a laser a pulsed signal, and by measuring the phase and frequency of the reflected light signal with respect to a reference.
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