June 30, 1930, is submitted and accepted first photoradiotherapy. Soviet scientist Hovhannes Adamyan Abgarovich decided to apply to photography’s invention by A. S. Popov radio. Thus, in fact, 85 years ago was the invention of the Fax machine. In 1921, the inventor has performed at the all-Russian electrotechnical Congress, which submitted its report on the transfer of photographic images over a distance. And only after 9 years, the zoo has carried out transmission and reception of the first in the history of photoradiotherapy your way between Moscow and Leningrad.
Hovhannes Adamyan takes the first photoradiotherapy
30 June 1948 publicly for the first time represented by the first transistor. A valid instance of the American physicists William Shockley, John Bardeen and Walter Brattain collected in 1947. Development was carried out in the laboratories of the Bell Telephone company. In practice, the transistor implemented by the staff of the bell States laboratories Gordon Teal and Morgan sparks. A month before the presentation was conducted by secret ballot, on which the new device chose the name. “Semiconductor triode” was too long, “triode surface States” in fact, was wrong, “lototron” does not explain the principle of operation. In the end, Bell Telephone has adopted the name “transistor” (transistor), which comes from the words transconductance (conductivity) or transfer (transfer) and varistor (varistor, controlled resistance). Transistor, which the scientists have invented 68 years ago, is now called the point.
Bardeen, Shockley and Brattain in the laboratory Bell
30 June 2010, the Bluetooth SIG adopted the Bluetooth specification 4.0. This version includes the classic Bluetooth protocols (from previous spec) and high speed (based on wifi). There is also a Protocol with low power consumption, which was intended to increase the operation time of devices with Bluetooth. The Protocol is designed for miniature sensors that don’t require always-on transmitter. Thus, the module is enabled only while sending data, and this allows the gadgets from one hour battery CR2032 during the year, and even more. Standard transmits data at a speed of 1 Mbps when data packet size 8-27 bytes. The first chip with Bluetooth 4.0 support was made at the end of 2009, the company ST-Ericsson. To date, a large number of mobile devices and wearable electronics are produced that support this standard.
Bluetooth 4.0