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Barrier coverage is a fundamental problem in wireless sensor networks, which can be applied to detect intruders that attempt to cross the boundaries of the region we are supervising. Among a number of issues related to barrier coverage, the most critical one is how to deploy sensors to construct barriers. Many barrier-building approaches have been proposed in previous papers by other scholars, while...
Background Anterior cervical discectomy and fusion (ACDF) has been considered as a gold standard for symptomatic cervical disc degeneration (CDD), which may result in progressive degeneration of the adjacent segments. The artificial cervical disc was designed to reduce the number of lesions in the adjacent segments. Clinical studies have demonstrated equivalence of cervical disc arthroplasty (CDA)...
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