Endoscopic transnasal canaliculorhinostomy for refractory common canalicular obstruction with an unidentifiable lacrimal sac

AIM: To describe the role of endoscopic transnasal canaliculorhinostomy (ETC) in refractory common canalicular obstruction (CCO) associated with an absent or unidentifiable lacrimal sac.METHODS: The records of patients with refractory CCO who underwent ETC at the Eye Hospital of Wenzhou Medical University from October 2007 to December 2016 were ret

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Tightly Coupled Integration of GPS Ambiguity Fixed Precise Point Positioning and MEMS-INS through a Troposphere-Constrained Adaptive Kalman Filter

Precise Point Positioning (PPP) makes use of the undifferenced pseudorange and copyright phase measurements with ionospheric-free (IF) combinations to achieve centimeter-level positioning accuracy.Conventionally, the IF ambiguities are estimated as float values.To improve the PPP positioning accuracy and shorten the convergence time, the integer ph

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Cell competition, cooperation, and cancer

Complex multicellular organisms require quantitative and qualitative assessments on each of their constitutive cell types to ensure coordinated and cooperative behavior towards overall functional proficiency.Cell competition represents one of the operating arms of such quality control mechanisms and relies on fitness Art Kit comparison among indivi

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