OPTIMIZATION OF FAST TOOL SERVO DIAMOND TURNING FOR ENHANCING GEOMETRICAL ACCURACY AND SURFACE QUALITY OF FREEFORM OPTICS

Optimization of fast tool servo diamond turning for enhancing geometrical accuracy and surface quality of freeform optics

Fast tool servo (FTS) in ultra-precision diamond turning is an efficient technique for high-precision fabrication of freeform optics.However, the currently adopted constant scheme for control point sampling takes no account of the shape variation of the desired surface, which might lose some micro features and result in low form accuracy and non-un

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Types and effectiveness of mental health promotion programmes for young people in sub-Saharan Africa: A systematic review

Studies show that mental health promotion is an effective strategy that can reduce the burden of mental health disorders and improve overall well-being in both children and adults.In addition to promoting high levels of mental well-being and preventing the onset of mental illness, these mental health promotion programmes, including mental illness p

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Algal Carotenoids: Chemistry, Sources, and Application

Recently, the isolation and identification of various biologically active secondary metabolites from algae have been of scientific interest, with particular attention paid to carotenoids, widely distributed in various photosynthetic organisms, including algal species.Carotenoids are among the most important natural ZINC PICOLINATE pigments, with ma

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The impacts of lithium and silicon coating on the W source in EAST

Application of lithium (Li) or silicon (Si) wall coating in the Experimental Advanced Superconducting Tokamak (EAST) has proven to be an effective method to reduce fuel recycling and control impurity level, and also to improve the plasma performance.In 2014, the upper graphite divertor in EAST was upgraded into a full tungsten (W) one with ITER-lik

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