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The covalent radius (a measure of how large individual atoms are) shows different trends if you are moving across a period or down a group. A comparison of the relative covalent radii of atoms is ...

Abstract: Sixth-generation (6G) mobile communication networks are expected to have dense infrastructures, large antenna size, wide bandwidth, cost-effective hardware, diversified positioning methods, ...

2 Department of Ophthalmology & Clinical Centre of Optometry, Peking University People’s Hospital, Beijing, China Objective This study aims to investigate the associations of axial length to corneal ...