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.

Unis

UNIS or Unis may refer to:

See also

RTL

RTL may refer to:

Media

Julius Oscar Brefeld

Julius Oscar Brefeld (19 August 1839 – 12 January 1925), usually just Oscar Brefeld, was a German botanist and mycologist.

Biography

Brefeld was a native of Telgte. He studied pharmacy in Heidelberg and Berlin, and afterwards served as an assistant to Anton de Bary (1831-1888) at the University of Halle. In 1878 he became a lecturer of botany at the Eberswalde Forestry Academy at Eberswalde, and in 1882 was a professor of botany at the University of Münster, as well as manager of its botanical gardens. In 1898 he succeeded Ferdinand Cohn (1828-1898) as professor at the University of Breslau. In 1898 Brefeld was stricken by glaucoma, and subsequently became totally blind. His eye problems caused him to retire from the university in 1909.

Brefeld was a prolific author of works in the field of mycology, being remembered for his writings on the heteroecious nature of fungal rusts and smuts. He pioneered culture techniques in the growth of fungi (using gelatin as a solid media), and in doing so, was able to study the life histories and systematic relationships of different groups of fungi. He is credited with providing nomenclature for a number of genera and species of fungi. The names Conidiobolus, Heterobasidion, Oligoporus and Polysphondylium (genus of slime mold) are a few of genera that he described. He is remembered for his disagreements with Anton de Bary in regards to the nature of yeasts as well as to the sexual nature of fungi (Brefeld maintained that higher fungi were devoid of sexuality).

Bref

Bref. is a French television series created by Kyan Khojandi, cowritten by the latter and Bruno Muschio, and produced by Harry Tordjman for My Box Productions. It has been broadcast on Canal+ since August 29, 2011. The end of the series was announced on June 29, 2012, the last episode having aired July 12, 2012.

Plot

The main character is an anonymous 30-year-old Parisian (he celebrates his 30th birthday in the 46th episode). He is also unemployed and single. He uses “I” to talk about himself, and his name is never revealed to the audience. His life is boring until he meets a girl at a party who unintentionally seduces him, especially with her eyes. As soon as the party is over, his only wish is to see her again. Many of the show's episodes are devoted to his failed attempts at meeting up with her or really connecting.

The hero sometimes looks for a job, and finally gets a one-on-one interview in a copying machine company. Despite a catastrophic interview that revealed all the lies about his CV, he gets the job. Nevertheless, exasperated by his workmates and bored by the job, he quits. Thereafter, he works in a call center (Telecom 3000).