the early years of radio, it was dominated by amateur operators and the public generally built their own receivers. This changed as the industry experienced notable growth during the 1920’s and expanded from a “live” medium to include previously recorded works. Radio advertising grew, networks began to form, and the first round of regulation was welcomed in order to establish better frequencies, free speech protections, equality amongst broadcasting stations, and that radio waves were public property
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Although both radio and television are geared more to entertaining than to informing, they have become increasingly concerned with the news. Certain radio stations are devoted entirely to news and opinion, with spot announcements, editorials, and in-depth reports. There is no national radio station in the United States, but every large city has dozens of independent stations, which range from twenty four hours a day news to rock and classical music. The first commercial radio station took to
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1957-1975 . The Cold War rivalry between the two nations focused on being firsts in space exploration to show a sign of superiority. The Space Race involved launching satellites, suborbital and orbital human spaceflight around the Earth, and manned flights to the Moon. It first began with the Soviet Union’s launch of the Sputnik 1 satellite on October 4. 1957, and ended with the Apollo-Soyuz human spaceflight mission in July 1975. The Apollo-Soyuz project symbolized an easing in the relationship between
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disaster’s such as. Physical Vulnerabilities * Weather * Environmental disaster – Earthquake, flood, tornado * Fire or other preventable disasters * Political instability in foreign countries * Satellite used for communication between China and San Jose, satellite could fail, be destroyed, or lose communication based on orbit and location Once these physical vulnerabilities have been assessed and determined Riordan can then start the process of providing a continuity plan in
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beautiful world. So what are these debris? Where are they from? How can we solve these? Why space debris? Because that the space is getting messy. Space trash is a big problem. The amount of debris orbiting keep growing ever single year. disrupting satellites and occasionally putting astronauts in harm’s way. if the problem gets severe enough, it should eventually make low-earth orbit unusable. Since 1970s, some scientists have been worrying about the space debris. How fast the space debris orbiting
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Air band radio 3. Single sideband | FM | 1. SNR is high, i.e. It is resistive to noise 2. It has good efficiency. | 1. Complicated receiver and transmitter. 2. It cannot be sent over long distances. | 1. Broadcast and Radio communication. | PM | 1. It is easy to implement PM compared to FM. 2. It is resistant to noise. 3. It requires less bandwidth. | 1. Encoding and decoding the signal is harder. | 1. Radio wave transmission 2. GSM 3. Wi-Fi 4. Satellite television
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field every day. This is especially true for communication between pilots in the air, and air traffic controllers on the ground, allowing them to communicate through text messages. Previously, the only way to communicate was by talking over the radio on VHF frequency. This technology is a great benefit to pilots and controllers reducing their work load. But some challenges lie ahead to fully integrate this system. Europe has been using this technology for a few years now while the United States
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electrical conductors or “wire”. The distances involved maybe short (a few meters as in television remote control) or long (thousands or millions of kilometers for radio communications). Wireless communication is generally considered to be a branch of telecommunications. It encompasses various types of fixed mobile and portable two way radios, cellular telephones, personal digital assistants (PDAs) and wireless networking. Other examples of wireless technology include GPS units, garage door openers
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names. (5) - 1880s long-distance calling (5) - 1891 first automating dialing system developed by an undertaker in Kansas City. (5) - 1927 first transatlantic service became operational using radio waves. (5) - 1946 world’s first mobile phone service, again using radio waves (5) - 1947 microwave radio technology used for the first time in long distance calls (5) - 1955 beginning of the laying of the transatlantic telephone cables (5)
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Earth's equator and following the direction of the Earth's rotation. 4c - Canada's first satellite was called Alouette. When Canada launched Alouette on September 29, 1962, Canada became the third country in the world to have a satellite in orbit, after the Soviet Union and the United States. 4d - Canada’s latest satellite’s name is Cassipoe. Questions Continued: 5- Four uses for satellites: * The First use is to make star maps * The Second use would be so
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