Abstract: This letter proposes a novel hybrid automatic repeat request with chase combining assisted sparse code multiple access (HARQ-CC-SCMA) scheme. Depending on whether the same superimposed ...
Abstract: Learner interactions are necessary for academic success and can be implemented synchronously or asynchronously in online education. Taking an online course from a university in Central China ...
The bell rings at 10:00 a.m. A teacher begins explaining quadratic equations. Some students lean forward, pencils ready. Others stare at the clock. A few are still turning yesterday’s lesson over in ...
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