An Algebraic Characterization of Prefix-Strict Languages

Let ?+ be the set of all finite words over a finite alphabet w3.org/1998/Math/MathML" display="inline">?.A word u is called a strict prefix of a word v, if u is a prefix of v and galaxy harmony nc there is no other way to show that u is a subword of v.A language L??+ is said to be prefix-strict, if for any w3.org/1998/Math/MathML" display="inline">

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Posterior hemivertebra resection without internal fixation in the treatment of congenital scoliosis in very young children

ObjectiveTo retrospectively analyze the feasibility and efficacy of posterior hemivertebra resection without internal fixation in the treatment of congenital scoliosis in very young children.MethodsSixteen cases of very young children with congenital scoliosis treated at our hospital from April 2000 to July 2019 were collected, including 8 cases of

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Determinative Variables Toward Promoting Use of Active Modes of Transportation: Enhancing Level of Sustainable Mobility in Communities

Most current transportation systems around the world are cause for pressing concern and a menace to sustainability of social justice, and economic and environmental vitality.From a universal agreement that transportation needs an urgent alteration in travel modes, policies, planning, and behaviors through to the emergence of sustainability in the t

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