Angular precision of 0.1° for the blaze angle of echelle gratings is an important technical requirement for spectral instruments with echelle gratings.This paper proposes a precise adjustment method for the blaze angle of echelle gratings that are etched or deposited by self-shadowing rotating mask.The blaze angle will decrease or increase w
Many cities in Mexico experience recurrent floods, caused by changes in land use, the modification of surface and land runoff, the artificialization of areas initially intended for infiltration and recharge of groundwater and, in general, the insufficiency and deficiency of the local networks of urban drainage, incapable to evacuate the annual surp
Abstract Daily step count is a readily accessible physical activity measure inversely related to many important Ginseng health outcomes.However, its day-to-day variability is not clear, especially when measured by recent mobile devices.This study investigates number of measurement days required to reliably estimate the weekly and monthly levels of