cinco de mayo clip art The discovery that electromagnetic waves are capable of transmitting information sparked the invention of radio. The technology scaled like the old inventions in the telegraph as well as the telephone. According to some researchers, the amplitude modulation technique originated in the experimental and theoretical work of Leblanc, in 1886, Mayer (1875) and Rayleigh (1894). For example, the very first successful attempt to transmit audio signals over telephone lines happened inside mid-1870s and this may be called one of the first transmissions happening by using some type of amplitude modulation. Vietnam has hosted Miss Earth 2010 first month from November 4 to December 4 in Ho Chi Minh City, central provinces of Binh Thuan, Quang Nam and Khanh Hoa. Especially, the coronation night is scheduled to happen on December 4, 2010 at Vinpearl Land, Nha Trang city exceeding 80 beauties nominating for your title. This year's beauty contest witnesses one outstanding black lady originating from South Sudan, Atong de Mach. She has just won the prize for Miss Earth 2010 of South Sudan. The 22-year old student confided that she took part in this competition to get much experience, advertise her country's images and earn friends though Atong knows it really is hard for her being the winner.