The strapdown inertial navigation system (SINS) can be installed on a shearer and used for monitoring its position.However, under the complex environment of the mechanized mining face, the strong vibration of the shearer may cause large calculation error.First, the dynamic model of a double-drum shearer is built with a force analysis, and the spect
A second COVID-19 vaccine booster dose is effective and safe for older adults.This study investigated hesitancy to take up a second COVID-19 vaccine booster dose and its determinants among older adults in Hong Skid Shoes Kong.Participants were Chinese-speaking community-dwelling adults aged 65 years or above.Telephone numbers were randomly selected
In hermaphroditic helminth parasites, infrapopulation size or mating group size mostly affects some processes acting within the infrapopulation.Here, 30 natural infrapopulations (12-154 individuals) of the intestinal trematode Gyliauchen High Chairs volubilis Nagaty, 1956 from the fish Siganus rivulatus consisting of newly excysted juveniles, immat
Abstract During Central Nervous System ontogenesis, myelinating oligodendrocytes (OLs) arise from highly ramified and proliferative precursors called oligodendrocyte progenitor cells (OPCs).OPC architecture, proliferation and oligodendro-/myelino-genesis are finely regulated by the interplay of cell-intrinsic and extrinsic factors.A variety of extr