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Alcon offices in Johns Creek, Georgia. Alcon Inc. ( German: Alcon AG) is a Swiss-American pharmaceutical and medical device company specializing in eye care products. It has a paper headquarters in Geneva, Switzerland but its operational headquarters are in Fort Worth, Texas, United States, where it employs about 4,500 people. [2]
In the Americas (defined as International Telecommunication Union (ITU) region 2), the FM broadcast band consists of 101 channels, each 200 kHz wide, in the frequency range from 87.8 to 108.0 MHz, with "center frequencies" running from 87.9 MHz to 107.9 MHz. For most purposes an FM station is associated with its center frequency.
Cellular frequencies. Cellular frequencies are the sets of frequency ranges within the ultra high frequency band that have been assigned for cellular-compatible mobile devices, such as mobile phones, to connect to cellular networks. [ 1] Most mobile networks worldwide use portions of the radio frequency spectrum, allocated to the mobile service ...
There are 51 MTAs, 493 BTAs and 175 EAs in the United States. A: 1850–1865 MHz and 1930–1945 MHz (30 MHz) B: 1870–1885 MHz and 1950–1965 MHz (30 MHz) C: 1895–1910 MHz and 1975–1990 MHz (30 MHz, 15 MHz or 10 MHz) D: 1865–1870 MHz and 1945–1950 MHz (10 MHz) E: 1885–1890 MHz and 1965–1970 MHz. F: 1890–1895 MHz and 1970–1975 ...
The General Dynamics F-16 Fighting Falcon is an American single-engine supersonic multirole fighter aircraft originally developed by General Dynamics for the United States Air Force (USAF). Designed as an air superiority day fighter, it evolved into a successful all-weather multirole aircraft with over 4,600 built since 1976. [ 4]
A graph of the A-, B-, C- and D-weightings across the frequency range 10 Hz – 20 kHz Video illustrating A-weighting by analyzing a sine sweep (contains audio). A-weighting is a form of frequency weighting and the most commonly used of a family of curves defined in the International standard IEC 61672:2003 and various national standards relating to the measurement of sound pressure level. [1]
The radio spectrum is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3,000 GHz (3 THz ). Electromagnetic waves in this frequency range, called radio waves, are widely used in modern technology, particularly in telecommunication. To prevent interference between different users, the generation and transmission of radio ...
The Electric Reliability Council of Texas (ERCOT) manages the flow of electric power on the Texas Interconnection, that supplies power to 26 million Texas customers – representing 90 percent of the state's electric load. [3] ERCOT is the first independent system operator (ISO) in the United States [4] and one of nine ISOs in North America. [5]