Abstract. The four-dimensional local ensemble transform Kalman filter (4D-LETKF) data assimilation system for the whole neutral atmosphere is updated to better represent disturbances with wave periods shorter than 1 d in mesosphere and lower thermosphere (MLT) region. First, incremental analysis update (IAU) filtering introduced reduce generation of spurious waves arising from insertion updates...

A set of various short artificial disturbances from rifle firings, car engine operation, radio, shakings the apparatus, etc. , were generated deliberately near our ELF recording stations in order to identify their footprint on recordings atmospheric electromagnetic radiation Schumann resonance (SR) band (from about 2–50 Hz). Such simulate anthropogenic noises hunters, hikers, campers, etc., whi...

the reaction of ch₃nh₂ with o₂ on the singlet potential energy surfaces (pes) was carried out using the b3lyp, ccsd(t) and g3b3 theoretical approaches along with 6-311++g(3df,3pd) basis set. the suggested mechanism for the title reaction consists of one pre-reactive complex. from the pre-reactive complex, nine types of products, ch2nh+h2o2, ch3nh+ooh, nh2cho+h2o, ch2nho+h2o, nh3+hcooh, ch2nh+h2...

results each group comprised 27 students; eventually, 26 in the homeopathic and 21 in the placebo group were followed up. there was no significant difference between the groups for either pain intensity (adjusted difference: -0.44; 95% ci: -1.43 to 0.54) or any other outcomes. compared with the baseline scores, statistically significant improvements were observed in pain intensity (p = 0.021) a...