Johannesburg Johannesburg were destroyed and their people driven away during the wars emanating from Zululand during the late 18th and early 19th centuries (the mfecane or difaqane wars), and as a result, an offshoot of the Zulu kingdom, the Ndebele (often referred to as the Matabele, the name given them by the local Sotho–Tswana), set up a kingdom to the northwest of Johannesburg around modern-day Rustenburg. The main Witwatersrand gold reef was discovered in June 1884 on the farm Vogelstruisfontein by Jan Gerritse Bantjes that triggered the Witwatersrand Gold Rush and the founding of Johannesburg in 1886. The discovery of gold
S transform leads to the result having poorer definition. In the second experiment, two more high frequency bursts are added to crossed chirps. In the result, all four frequencies were detected by the S transform. On the other hand, the two high frequencies bursts are not detected by STFT. The high frequencies bursts cross term caused STFT to have a single frequency at lower frequency. S transform S transform as a time–frequency distribution was developed in 1994 for analyzing geophysics data. In this way, the "S" transform is a generalization of the short-time Fourier transform (STFT), extending the continuous wavelet transform and