Radio

Radio is the use of radio waves is to carry information, such as sound, by systematically modulating some property of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.

Radio systems need a transmitter to modulate (change) some property of the energy produced to impress a signal on it, for example using amplitude modulation or angle modulation (which can be frequency modulation or phase modulation). Radio systems also need an antenna to convert electric currents into radio waves, and vice versa. An antenna can be used for both transmitting and receiving. The electrical resonance of tuned circuits in radios allow individual stations to be selected. The electromagnetic wave is intercepted by a tuned receiving antenna. A radio receiver receives its input from an antenna and converts it into a form usable for the consumer, such as sound, pictures, digital data, measurement values, navigational positions, etc. Radio frequencies occupy the range from a 3 kHz to 300 GHz, although commercially important uses of radio use only a small part of this spectrum.

Samara

Samara may refer to:

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Samara Felippo

Samara Felippo Santana (born October 6, 1978 in Rio de Janeiro) is a Brazilian actress.

Biography

Samara had planned to become a gymnast but decided to study theater to lose her inhibitions. At age 17, she decided against taking competitive exams to major in Computer Science upon being offered a spot in the actors troupe of the television network Rede Globo.

Career

She was invited to join Caça Talentos, a children's morning telenovela (televised soap opera) with Angélica. In early 1997, she participated in the Star for a Day segment of the weekly Sunday TV program Domingão do Faustão. Her test was to re-enact a scene in the role of the Nívea Stelmann character in the soap opera A Indomada opposite Matheus Rocha. Her performance was excellent and enabled her to participate in other productions of the soap opera broadcast industry.

The first such soap opera, Anjo Mau, found Samara playing the young Simone Garcia. Later, she performed in Meu Bem Querer and Suave Veneno, among others. The highlight of her career came in Malhação, where she portrayed the rebellious Érica Schmidt, a character who discovers she has contracted HIV. In 2003, Mariana played the romantic Mariana, in the miniseries A Casa das Sete Mulheres; later that year she portrayed Celina Costa Andrade Fernandes in Chocolate com Pimenta. In 2004 she was in the soap opera Da Cor do Pecado, where she showed her comic vein opposite Karina Bacchi and Rosi Campos. In 2005, she played the coquettish Detinha in América. Exploring her comic side, the character of pedestrians trying to conquer the city and get a boyfriend at all costs.