Musical theatre singing requires the use of two vocal registers in the female voice. The voice source and subglottal pressure Ps characteristics of these registers are analysed by inverse filtering. The relationship between Ps and closed quotient Qclosed, peak-to-peak pulse amplitude Up-t-p, maximum flow declination rate MFDR and the normalised amplitude quotient NAQ were examined. Ps was typic...

The power spectrum of airborne magnetometer total intensity field profiles can be used to determine average depth values to buried magnetic rocks. These depths are established from the slope of the log-power spectrum at the lower end of the total wavenumber, or spatial frequency band. The method is based on the assumption that the magnetic effect of the basement surface can be simulated by an u...

A total of 33 polar ring galaxies and polar ring galaxy candidates were observed in the 21-cm H i line with the 64-m Parkes radio telescope. The objects, selected by their optical morphology, are all south of declination –39◦ and in only 5 of them H i had been reported previously. H i line emission was detected towards 18 objects, though in 3 cases the detection may be confused by another galax...

In this paper, we propose a calculation method of local dominance and enhance multiobjective evolutionary algorithms by performing a distributed search based on local dominance. We divide the population into several sub-populations by using declination angles of polar coordinate vectors in the objective space. We calculate local dominance for individuals belonging to each sub-population based o...

Abstract In December 2019, the International Association of Geomagnetism and Aeronomy (IAGA) Division V Working Group (V-MOD) adopted thirteenth generation Geomagnetic Reference Field (IGRF). This IGRF updates previous with a definitive main field model for epoch 2015.0, 2020.0, predictive linear secular variation 2020.0 to 2025.0. letter provides equations defining IGRF, spherical harmonic coe...