generally, the measured secondary field data is inverted into resistivity using two principal models; the homogeneous half-space model and the layered half-space model. while the homogeneous half-space inversion uses single frequency data, the inversion is done individually for each of the frequencies used, the multi-layer 1d inversion is able to take the data of all frequencies available into ...

The first priority in designing a strategy to control nitrogen oxides is to protect human health. Human health impacts appear to be related to peak exposures to nitrogen oxides (NOx). In addition to potentially damaging human health, nitrogen oxides are precursors to ozone (O3) formation, which can harm human health and vegetation. Finally, nitrogen oxides contribute to acid deposition, which d...

Substantial efforts have recently been made toward integrating more processes to improve ecosystem model performances. However, model uncertainties caused by new processes and/or data sets remain largely unclear. In this study, we explore uncertainties resulting from additional nitrogen (N) data and processes in a terrestrial ecosystem (TECO) model framework using a data assimilation system. Th...

In the title mol-ecule, C(17)H(21)FN(2)S, the mean planes of the benzene ring and the thio-urea fragment form a dihedral angle of 61.93 (9)°. In the crystal, pairs of weak N-H⋯S inter-actions link the mol-ecules, forming inversion dimers.

In the title compound, C(12)H(12)ClF(3)N(2)OS, the dihedral angle between the benzene ring and the thio-urea fragment is 69.41 (5)°. The thio-urea N-H atoms adopt an anti conformation, such that one of them forms an intra-molecular N-H⋯O hydrogen bond, generating an S(6) ring. In the crystal, both N-H groups form inversion dimers, one via a pair of N-H⋯S hydrogen bonds and one via a pair of N-H...

We pump low-pressure nitrogen gas with ionizing femtosecond laser pulses at 1.5 μm wavelength. The resulting rotationally excited N2 molecular ions generate directional, forward-propagating stimulated and isotropic spontaneous emissions at 428 nm wavelength. Through high-resolution spectroscopy of these emissions, we quantify rotational population distributions in the upper and lower emission l...

Inversion of magnetic data is an important step towards interpretation of the practical data. Smooth inversion is a common technique for the inversion of data. Physical bound constraint can improve the solution to the magnetic inverse problem. However, how to introduce the bound constraint into the inversion procedure is important. Imposing bound constraint makes the magnetic data inversion a n...

In this paper, we studied effect of different parameters including density, viscosity, interfacial tension and solute transfer concentration on phase inversion hold-up. The results showed that change in phase density ratio had no effect on phase inversion hold-up. It also disclosed that the phase viscosity ratio was the most effective parameter affecting phase inversion hold-up and each phase h...