Ben Hargreaves looks into why ADHD medicines are still suffering shortages nearly a year after first being announced. The problem has emerged due to surging demand for the medication, but also amid a ...
Abstract: Noncrossing catenary turnout section is a specific catenary arrangement for electrified railways. The height of the contact wire changes dynamically to enable the pantograph to transition ...
Abstract: Sixth-generation (6G) mobile communication networks are expected to have dense infrastructures, large antenna size, wide bandwidth, cost-effective hardware, diversified positioning methods, ...
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