Global navigation satellite system signals are known to be an efficient tool monitor the Earth ionosphere. We suggest Galileo E5 AltBOC phase and pseudorange observables—a single-frequency combination—to estimate ionospheric total electron content (TEC). performed a one-month campaign in September 2020 compare noise level for different TEC estimations based on dual-frequency data. Unlike GPS, G...

the purpose of this study was to examine cook’s (2003) ‘multiple competence’ by investigating backward pragmatic transfer (from l2 [english] to l1 [persian]) in refusals to invitations. it explored participants’ frequency and content of refusal strategies in l1 regarding the status (i.e., power and distance) of interlocutors and the proficiency level of efl learners. the participants were persi...

skidding operations can cause considerable and wide spread soil disturbance. the objective of this study was to evaluate the effects of ground skidding operations on soil compaction, moisture content, and total porosity at different levels of slope and traffic frequency. four levels of traffic intensity (3, 8, 13, and >13 passes of a crawler tractor onezhets ? 110) and three levels of slope ( 2...

The Wigner-Ville Distribution (WVD) is a promising method for analyzing frequency variations in seismic signals, including those of interest for structural monitoring. Nonlinearities in the force displacement relationship will temporarily decrease the apparent natural frequencies of structures during strong to moderate excitation, and earthquake damage can permanently change building stiffnesse...